bluuebunny/crossref_metadata_2025 huggingface dataset:
Poetik des Kolibris
Authors: Jöhnk Marília
Published: October 2021

Lange Zeit galten Reiseberichte als Wegbegleiter des Kolonialismus. Dies ändert sich im Lateinamerika der 1920er Jahre, wovon die in Vergessenheit geratenen Feuilletonartikel, Tagebücher und Aufzeichnungen der chilenischen Nobelpreisträgerin Gabriela Mistral, des »Papstes des brasilianischen Modernismus« Mário de Andrade und des belgisch-französischen Avantgardisten Henri Michaux zeugen. Marília Jöhnk geht dem wissensgeschichtlichen Interesse der drei Reisenden am Kontinent und ihrem Spiel mit etablierten Formen literarischer Wahrnehmung nach. Mit dem tief in der aztekischen Mythologie verankerten Kolibri eint deren kleine Reiseprosa nicht nur die kompakte Größe, sondern auch die Mobilität und Geschwindigkeit.
Development and Evaluation of Scales for Measuring Self-Efficacy and Teaching Beliefs of Students Facilitating Peer-Supported Pedagogies
Authors: Clark Aaron M. , Raker Jeffrey R.
Published: October 2021

Two scales measuring teaching self-efficacy and beliefs were developed from previous instruments for use with near-peer facilitators assisting with peer-supported pedagogies. Construct and face validity, measurement reliability, and factor structure were determined using a population of near-peer facilitators working in a peer-led team learning chemistry classroom at a large research-intensive postsecondary institution in the Southeast United States. Results suggest that the scales produce valid and reliable data. Teaching self-efficacy and beliefs were found to increase between pre and post administrations with small to medium effect sizes. The scales can provide a means to evaluate peer-supported pedagogies and as discussion points for faculty members training near-peer facilitators.
Multi-factor analysis and operation optimization for the imple-mentation of foreign economic activity AT an industrial enterprise
Authors: Bataev Vyacheslav V.
Published: October 2021

The paper is devoted to the urgent problem of increasing the efficiency of foreign economic activity of enterprises of the metallurgical and machine-building industries. To increase the economic efficiency of industrial enterprises functioning in the process of implementing foreign economic activity, the paper proposes an algorithm for multivariate analysis, including the procedure for optimizing the system of interaction between an enterprise and customs authorities. When developing and testing the algorithm, customs operations are considered as critical links that determine the increase of the enterprise foreign economic activity efficiency. The mathematical programming problems are formulated on the basis of the CCR model of the DEA (Data envelopment Analysis) method to carry out a multivariate analysis of the comparative efficiency of import and/or export customs operations. The relative efficiency estimates obtained from solving mathematical programming problems make it possible to identify ineffective or least effective export and import customs operations. Based on directed weighted graphs, the special procedures have been developed to optimize the following parameters of customs operations: time of customs operations, labor costs of the enterprise, financial costs associated with compliance with the established prohibitions and restrictions of foreign trade. The algorithm was tested on the example of an industrial enterprise in the metallurgical industry Arkonik SMZ, which carries out export operations for the sale of lid tape of its own production, as well as import operations for the supply of varnish, which is a necessary technological material to ensure the production process of the tape. The administrative and operational decisions made on the basis of comparative evaluations of the obtained optimization results make it possible to exclude ineffective customs operations of foreign economic activity of an industrial enterprise.
Riddance jamming of pipeline shut-off valves
Authors: Bazarov Alexander A. , Bondareva Nataliya V. , Navardyan Ashot A.
Published: October 2021

The paper conciders the problems of modeling the processes of thermal deformation of valves with an ambient temperature decrease. Some type of wedge valves are exposed to jamming. Heating the valve body is used to eliminate jamming. This problem is common for rigid wedge valves but the reasons not fully explained. Sometimes the valve stem is destroyed due to the significant power of the gate valve electric drives. The aim of the study is to determine the nature of the stress distribution between the structural elements of the valve, which are the cause of jamming with an ambient temperature decrease, and to search for the parameters of the heating process that ensure minimum energy consumption and time.

To study the thermal processes in the valve body, a numerical model describing the heat transfer in the structural elements and the fluid is developed. The thermal model is combined with the elastic deformation model. That allows to make compatible calculations without introducing additional errors. The thermal deformations appear in the cooling process and give rise to disproportionate changes in valve dimensions and thermal stresses. Thermal stresses are the cause of jamming. Modeling of the processes of thermal deformation with a decrease in temperature showed that pressure forces of different signs arise in the middle plane of the wedge. At the average height of the horizontal line, there is a compacting pressure and at the lower and upper points there is a stretching pressure. To eliminate the compacting forces local heating was performed in several areas of the body. It was found that the most effective option is to heat the lower hemispherical surface of the body. Heating for thirty minutes reduces the thermal stresses in the wedge and compressive forces to minimum values. For this reason, jamming of the valve is eliminated. For heating the body, a hemispherical induction heater with a magnetic core is provided. The proposed design allows the use of industrial frequency voltage without a step-down transformer and reactive power compensation.
Implicancias de la inclusión financiera y el empleo informal en la pobreza monetaria de los departamentos del Perú
Authors: Grados Smith Pedro
Published: October 2021

A pesar de un crecimiento sostenido del PBI del Perú en los últimos veinte años, la pobreza monetaria aún es el principal problema económico y social. Este fenómeno se extiende a dos factores importantes: la inclusión financiera y el empleo informal, que tienen implicancias en la sostenibilidad de los mecanismos impulsores del crecimiento económico para aliviar la pobreza. Utilizando el modelo econométrico de mínimos cuadrados generalizados factibles (FGLS) con efectos fijos (FEGLS), a fin de controlar los efectos heterogéneos entre los departamentos del Perú durante el periodo 2010-2019, este documento evalúa empíricamente el impacto de la inclusión financiera y el empleo informal en la pobreza monetaria. Los resultados empíricos muestran que la expansión de la inclusión financiera beneficiaría a la reducción de la pobreza monetaria, en tanto con respecto al empleo informal se revela que existe una relación negativa: se determina que su desarrollo está asociado con la reducción de la pobreza, pero no es determinante para su alivio.
Una revisión para el Perú de la relación entre el desempleo, el subempleo y la producción
Authors: Samanamud Valderrama Enrique
Published: October 2021

Este artículo examina la relación entre el desempleo y la producción en el Perú entre 1970 y 2018 —denominada comúnmente como Ley de Okun—, a partir de las dos primeras versiones planteadas originalmente por Arthur Okun. Asimismo, se plantea una nueva formulación econométrica que agrega al desempleo el subempleo como variable dependiente, buscando una aproximación a los elevados niveles deempleo precario característicos de economías en desarrollo, que sirven de vía de escape a la población y evitan mayores niveles de desempleo. Finalmente, a los modelos se incorporan variables adicionales al producto que permitan un mejor ajuste. Los resultados evidencian inferiores niveles del coeficiente en comparación con los estimados originalmente para la economía de Estados Unidos y de similares trabajosefectuados para las economías desarrolladas por diversos autores, lo que implica mayores niveles de producto para reducir el desempleo. Además, la reformulación agregada de desempleo con subempleo ayuda a explicar mejor las necesidades de crecimiento de la economía peruana.
Mogontiacum: czynniki rozwoju
Authors: Mrozewicz Leszek
Published: October 2021

The history of Mogontiacum spans the period from 17/16 BCE to the end of the fourth century CE. It was a strong military base (with two legions stationed there in the first century) and a major settlement centre, though without municipal rights. However, the demographic and economic development, as well as the superior administrative and political status enabled Mogontiacum to transform – in socio-economic and urbanistic terms – into a real city. This process was crowned in the latter half of the third century with the construction of the city walls.
Tšcnhj eØr»mata. The Motif of Culinary Inventions in the Middle and New Comedy and Gastronomic Poetry
Authors: Stuligrosz Magdalena
Published: October 2021

The purpose of this paper is to show how Middle and New comedy as well as gastronomic poetry authors use the protos heuretes-motif characteristic of literature undertaking heurematographic themes, to present the originality and innovation of the cook’s and parasite’s art.
Portret idealnej królowej w antycznej powieści greckiej – w stronę modelu
Authors: Cieśluk Małgorzata
Published: October 2021

This article line of reasoning follows the assumption that in the period in which the ancient Greek novel was developing there already existed fixed cultural norms which thus provided for the frames of the then literary presentations of women in power. In Callirhoe by Chariton or Aethiopica by Heliodorus the reader comes across three images of queens and can consequently ponder over the most significant elements of the model of an ideal female ruler. The comparative analysis of the three heroines in question as well as the juxtaposition of their images with the remaining female characters of Greek novels thus constitutes the core of the article.
„Vectes” i „vestes”. Dwie lekcje antycznego tekstu i dwie różne imitacje
Authors: Głombiowska Zofia
Published: October 2021

The article shows the Horatian ode III 26 on the background of the votive epigram and in reference to the custom and at the same time the topos of „winning” by violence the house of a lover (frangere postes) and the way of imitating this ode by Filip Buonaccorsi Kallimach in the XXVII elegy and by Jan Kochanowski in the elegy II 11 (in the version preserved in the so-called Osmólski’s manuscript). Callimachus had the text of the ode with the lesson of vestes in verse 7, Kochanowski with the lesson of vectes. As a consequence, in Kallimach’s elegy there is no topos of breaking the door, but the motif of the victorious militia amoris remains, while Kochanowski uses the topos of frangere postes, but departs with love, Lydia and the goddess Venus not with the satisfaction of a victorious soldier, but similarly to Propertius in anger and with a feeling of experienced harm.
A Brief, Mobile Intervention to Decrease Depression and Loneliness and Improve Relationship Quality During the Covid-19 Pandemic
Authors: Kanter Jonathan W. , Nash Michael G. , Kuczynski Adam , Rosen Daniel C.
Published: October 2021

Introduction: Effective, scalable interventions to address depression and loneliness and improve the quality of social relationships are needed for public health in pandemic and non-pandemic contexts. Towards this end, a randomized, controlled trial tested a mobile-based intervention, derived from social psychological and relationship science, for improving relational well-being and decreasing depression and loneliness. Methods: Participants were randomly assigned to either intervention (n = 719) or assessment only (n = 701) conditions and completed daily diary surveys for 28 days in the midst of the first wave of the Covid-19 pandemic. In the middle 14 days of the study, intervention participants received daily text-message suggestions for improving relational and mental well-being. Results: Results indicated that the intervention decreased depression and loneliness and improved relationships during the intervention period but these changes were not sustained when the intervention ceased. Discussion: Results are encouraging in that evidence-based suggestions can be scaled effectively but additional efforts are required to sustain improvements over time.
Educación musical, creatividad y tecnología: Un estudio exploratorio sobre estrategias docentes y actividades creativas con software ex novo
Authors: Riaño Maria Elena , Murillo Adolf , Tejada Jesús
Published: October 2021

Objetivo. Analizar las estrategias y las actividades creativas que el profesorado de música realiza en sus aulas mediante un software construido por las personas investigadoras que facilita la creación sonora colaborativa en contextos docentes. Método. El trabajo se ha realizado mediante un enfoque exploratorio-descriptivo a través de una experiencia didáctica desarrollada durante 12 semanas en aula y después se encuestó a 27 docentes de educación primaria y secundaria. La encuesta recogió información sobre actividades de aula realizadas, procesos creativos llevados a cabo, estrategias docentes adoptadas, recursos de aula y uso del software en las actividades. Resultados. Los resultados muestran: 1) un estilo directivo del profesorado; 2) unas actividades creativas que estuvieron limitadas en su mayoría a sonorización de imágenes y relatos; 3) una dedicación horaria en clase media-baja; 4) percepciones positivas sobre el trabajo cooperativo y la creatividad del alumnado; 5) una valoración positiva del software 6) un gran número de problemas de comprensión del software. Conclusiones. Se sugiere la necesidad de una mayor implicación del profesorado en los procesos creativos de composición, así como una mayor y mejor formación tecnológica de este.
Jogos Paralímpicos no caderno de esportes do jornal O Globo
Authors: Marinho da Silva Jaqueline Monique , Fernandes da Silva Carolina , Torres Pereira Eveline
Published: October 2021

O objetivo do estudo é analisar a cobertura do caderno de esportes do jornal O Globo durante as edições dos Jogos Paralímpicos de 1988 a 2016. Para tanto, foram coletadas notícias no acervo online do jornal O Globo, três dias antes e três após o término de cada edição dos Jogos Paralímpicos de 1988 a 2016, posteriormente, foram analisadas e interpretadas com o auxílio do software ATLAS.ti 7.5.18, a partir da técnica de análise documental. Evidenciou-se uma tendência em noticiar os feitos esportivos dos atletas utilizando terminologias depreciativas ou enfatizando assuntos que não possuíam relação direta com o ambiente esportivo.
TAKE THE RISK OR LOSE THE CHANCE!
Authors: Tsvetkova G. , Zdravkov Y. , Oscar A.
Published: October 2021

The hallmark of keratoconus is central or paracentral stromal thinning, accompanied by apical protrusion and irregular astigmatism. Patients typically experience variable reductions in visual acuity, image distortion, and increased sensitivity to glare and light. The latter becomes of major interest when patients with keratoconus present with a cataract which contributes to a further visual decline.
PURPOSE: To present a case report of a patient who underwent cataract surgery, with implantation of an intraocular implant called pinhole and correction of an irregular corneal astigmatism as a result of keratoconus.
METHODS: A report of a rare case, the first implantation of XtraFocus implant in Bulgaria for the correction of keratoconus combined with cataract.
RESULTS: All necessary measurements were performed using an iTrace aberrometer and IOL Master 700. The cataract removal was performed by standard phacoemulsification followed by implantation of a pinhole implant in the capsular bag. No complications related to the position of the implant were observed in the postoperative period. Optimal correction of the distance vision and near vision was achieved, and the results were monitored within six months after surgery.
CONCLUSION: The pinhole implant was securely positioned in the capsular bag. Well tolerated by the patient, the implant played a key role in effectively overcoming the irregular corneal astigmatism. There is a significant improvement in visual acuity with results satisfying the patient's high expectations.
Hydrogel networks by aliphatic dithiol Michael addition to glycidylmethacrylated gelatin
Authors: Neffe Axel T. , Löwenberg Candy , Lendlein Andreas
Published: October 2021

Functionalization of gelatin with glycidylmethacrylate (GMA-gelatin) enables network formation employing the double bond, so that the reaction is orthogonal to the inherent functional groups in the biomacromolecule. Here, network formation by crosslinking of GMA-gelatin with hexane 1,6-dithiol or nonane 1,9-dithiol to tailor properties and enable a shape-memory effect is shown by 1H NMR and FT-IR spectroscopy. Hydrogel swelling (460–1900 vol%) and mechanical properties (Young’s modulus E = 59–512 kPa, elongation at break εb = 44–127%) depended on the molecular composition of the networks and temperature. Increased crosslinker length, thiol:methacrylate molar ratio, and precursor concentrations led to denser networks. Change of properties with temperature suggested adoption of triple helices by gelatin chains, forming physical netpoints at lower temperatures (< 20 °C). However, the limited freedom of the gelatin chains to move allowed only a minimal extent of triple helices formation, as it became apparent from the related signal in wide-angle X-ray scattering and the thermal transition associated to triple helices in some networks by DSC. The presented strategy is likely transferable to other biomacromolecules, and the results suggest that too short crosslinkers may result in a significant amount of grafting rather than network formation.

Graphic abstract
Markers of atherosclerosis lipoprotein-associated phospholipase A2 and E-selectin and vascular risk factors in patients with carotid stenosis
Authors: Dubenko Olga , Anysienkova Victoria
Published: October 2021

The aim of this study is to evaluate serum level biomarkers of atherosclerosis lipoprotein-associated phospholipase A2 and E-selectin in patients with atherosclerotic carotid stenosis with different clinical manifestation in associated with vascular risk factors.

Materials and methods: A total 106 patients with atherosclerotic carotid stenosis (74 men and 32 women, aged from 31 to 74 years, mean 62.6±0.9) were included: with acute ipsilateral atherothrombotic stroke (35), history of stroke and carotid endarterectomy (41) and 30 patients with asymptomatic carotid stenosis. The control group consist of 20 health subjects without cardiovascular disease. All participants underwent duplex sonography. Lipoprotein-associated phospholipase A2 and E-selectin was measured using commercially available (ELISA) kit.

Results: The level of lipoprotein-associated phospholipase A2 was in general 55.664±3.537 ng/ml, which was significantly higher (M-W U=10, p=1.023136´10-11 <0.05) than in the control group (9.296±0.935 ng/ml). Level was significantly higher in groups of symptomatic patients who underwent carotid endarterectomy (p=0.04893), and proportion patients with high degree stenosis >70 % was greater in this group. The level of E-selectin in the study patients was significantly higher (7.653±0.246 pg/ml) than in the control group (3.101±0.503 pg/ml) p<0.05. No association the serum level of lipoprotein-associated phospholipase A2 and E-selectin with common stroke risk factor such as hypercholesterinemia, smoking and body mass index were found, but positive correlation of lipoprotein-associated phospholipase A2 with E-selectin was significant (p=0.00085).

Conclusions: Increasing plasma level lipoprotein-associated phospholipase A2 and E-selectin in patients with the carotid atherosclerotic stenosis were observe. Statistically significant correlation between the level of lipoprotein-associated phospholipase A2 and E-selectin were found in symptomatic carotid atherosclerotic stenosis
Methodological principles for improving the professional training of doctors in the process of studying biological and bioorganic chemistry in the aspect of chemical safety
Authors: Ishchenko Alla , Liudmyla Haiova , Horkunenko Oksana
Published: October 2021

Chemical safety is a component of general and professional competencies of future doctors, namely: general culture (handling of chemical substances, household chemicals); promotion of a healthy lifestyle; prevention of diseases of the population; protection and preservation of public health; providing emergency medical care in emergencies (related to chemical accidents). The article substantiates the method of improving the professional training of future doctors by integrating modern aspects of chemical safety into biochemical training. The potential of the discipline "Biological and Bioorganic Chemistry" as a tool for the formation of competence in chemical safety of future physicians, due to a combination of theoretical training (training material on the mechanisms of inhibition of enzymatic reactions by toxicants; inhibitors and disintegrants of oxidative phosphorylation; molecular mechanisms of action of toxicants; formation and disposal of endogenous toxins; biotransformation of xenobiotics) and laboratory workshops (handling of chemical reagents; modern approaches to hazard labeling and labeling of chemicals; toxicants’ action modeling) is substantiated. The method of studying the educational material of the discipline "Biological and Bioorganic Chemistry" in the context of modern ideas on chemical safety is described. It provides a comprehensive application of modern teaching methods (design, solving situational problems, laboratory experiments, simulating the action of hazardous chemicals, testing) and teaching aids (glossary of terms on biochemical aspects of chemical safety; video lectures and methodical recommendations for independent work of students). The stages of the study method realization of the "Biological and bioorganic chemistry" discipline’s educational material in the context of modern ideas on chemical safety are described. These are the substances’ handling culture formation; formation of biochemical aspects of chemical safety; integration of modern ideas in the field of chemical safety and biochemical components
Morphological and anatomical properties of Veronica crista-galli Steven
Authors: Pashayeva Nigar Hidayet , Suleymanov Tahir Abbasali , Kerimov Yusif Balakerim , Gasimov Eldar Kocheri , Rzayev Fuad Huseynali
Published: October 2021

The aim of this work was to study of diagnostic signs of the morphological and anatomical structure of Veronica crista-galli Steven. from the flora of Azerbaijan.

Materials and methods. The samples for research were collected during their flowering time in June 2018, in the Ismailli region of the Republic of Azerbaijan. Plant samples were fixed in a solution made in 0.1 M phosphate buffer (pH=7.4), containing 2.5 % glutar-aldehyde, 2.5 % paraformal-aldehyde and 0.1 % picric acid. In the next stage was the preparation of block and their filling in Araldite – Epon according to the TEM method.

Results. The leaf is simple, lower part is short-petiolate and upper is sessile. The surface, on both sides of the leaf, is reliefly, and 7–8 conductive veins are clearly visible. The lower and upper sides of the leaf, and also margin, are strewn with multicellular hairs. The calyx of the flower consists of two sepals which grown together at the base, covered with simple multicellular hairs. The stalk in is a long filiform. The corolla of flower consists of 4 petals which grown together at the base and 2 stamens attached to the tube of the corolla. On the epidermis, cells with sinuous and bead-like walls, numerous stomata of the stavrocytic type, capitate hairs are visible. From the cross section of the leaf, it is visible that palisade tissue at the upper and sponge tissue at the bottom.

Conclusions. As a result of morphological and anatomical studies, it was revealed that diagnostic signs of plant raw material can be: Present of multicellular hairs on the leaf blade; The location of the capsule between the sepals; Stavrocytic type of the stoma structure; The bead-like walls of the epidermis; Capitate hairs on the epidermis; Sepals covered by hairs.

The established anatomical diagnostic features can be used for the drafting of the normative document on the plant raw materials and for identification of plant raw material of Veronica crista-galli
AUTOMATIC DETERMINATION OF THE NAVIGATORS MOTIVATION MODEL WHEN OPERATING WATER TRANSPORT
Authors: Nosov P. S. , Popovych I. S. , Zinchenko S. M. , Kobets V. M. , Safonova A. F. , Appazov E. S.
Published: October 2021

Context. The article proposes an approach for automated identification of the  navigators motivational model in the control of water transport. Algorithms for data extraction as a result of the man-machine interaction of navigator with the electronic control systems of the vessel during performing navigation operations of increased complexity are proposed.

Objective. The purpose of research is to apply formal and algorithmic approaches to extracting data on the motivational model of navigator to prevent accidents in water transport. 

Method. The identification of manifestation determination of navigators’ mental activity by means of the visual concept of the geometric group theory is proposed. This approach delivered the visual systematic-logical combining of diagnostic methods aimed at determining navigators motivational centers and the processes of professional activity like maneuver performing. The key indicator of identification is said to be the parameter of the navigator’s activity as “rpm_port” having an impact on the vessel speed being a marker of intensification of the navigator’s physiological activity. Such an approach is beneficial in time phase identification while maneuvering indicating explicitly at the stepping up of the navigator’s physiological motivational state. It was proven to be correct based on the results due to Ward’s dendrogram, several statistical methods and applied software. The obtained research results encourage the prediction of the navigator’ motivational states in critical situations.

Results. In order to confirm the proposed formal-algorithmic approach, an experiment was carried out using the navigation simulator Navi Trainer 5000. Automated analysis of experimental ones made it possible to form a motivational map of the navigator and determine the decision-making model affecting in the processes of  control vessel in difficult situations.

Conclusions. The proposed research approaches made it possible to automate the processes of extracting data indicating the principles of decision-making by navigator. The effectiveness of proposed approach was substantiated by the results of experimental data automated processing and the constructed tree-like decision-making spaces.
MULTI-AGENT LATENT SEMANTIC INTERNET TECHNOLOGY FOR THE FORMATION OF A SUBJECT-ORIENTED KNOWLEDGE MODEL
Authors: Stenin A. A. , Pasko V. P. , Soldatova M. A. , Drozdovich I. G.
Published: October 2021

Context. The article proposes a latent-semantic technology for extracting information from Internet resources, which allows processing information in natural language, as well as a multi-agent search algorithm based on it. The relevance of this approach to the search for subject-oriented information determined by the fact that currently a direct lexical comparison of queries with document indexes does not fully satisfy the developer. The object of the study is a multi-agent latent-semantic algorithm for searching for subject-oriented information. 

Objective.  The work is to increase the efficiency of forming a knowledge model that is adequate for this subject area.

Method. A latent semantic technology based on the weighted descriptor method developed by the authors is proposed. The main difference from the existing methods is that the analysis of words occurring in the text both in frequency and taking into account semantics carried out by selecting the appropriate descriptors, which improves the quality of the information found.

Results. The developed latent-semantic technology of information search tested in the task of constructing a knowledge model of automated decision support systems for operational and dispatching control of urban engineering networks. The conducted modeling of the search for subject-oriented information in this subject area showed the effectiveness of the developed approach.

Conclusions. Improving the efficiency of search and semantic content of subject-oriented information of the knowledge model of this subject area achieved by using the weighted descriptor method based on Zipf’s laws in this technology. The prospects for further research are to build evolutionary models of knowledge and improve the quality of updated information.
Materials based o tricalcium phosphate as bone defects substitute (literature review)
Authors: Korzh Mykola , Filipenko Volodymyr , Poplavska Karolina , Ashukina Nataliya
Published: October 2021

The objective of the study is to determine the current tendencies in the use of osteoplastic materials based on tricalcium phosphate (TCP) in orthopedics and traumatology. Methods. The search of the scientific information for the analysis was carried out in the PubMed, Google Scholar, World Digital Library, ScienceDirect. Results. The development of biomaterials for reconstructive surgery on the skeleton remains an urgent issue of biomaterial engineering, biology and current traumatology and orthopedics. Calcium-phosphate ceramics have the excellent properties of biocompatibility, affinity with bone tissue, biodegradability as well as perfect osteoconductive and osteointegrative properties. They are used in orthopaedics and traumatology as a coating for endoprosthesis components in order to achieve a strong bond with the bone as well as a filling material for bone defects in the form of blocks, granules or powder. The optimal structure of ceramic materials in order to achieve the necessary hardness and control of the dissolution rate is still undetermined. The interest of researchers in the creation of osteoplastic materials containing TCP is explained by the advanced osteoinductive properties and the ability to quickly degrade with the formation of bone tissue. Due to different configurations and sizes of the bone defects, the creation of a material with osteoinductive and osteoconductive properties that could be inserted into the cavity in a liquid state and which would quickly harden and acquire the properties similar to those of the bone has been of great current interest. The material should be biodegradable while having sufficient time for bone formation at the implantation site. In view of the above, the creation of cements based on calcium phosphates has become more attractive. Unfortunately, this material is limited in use due to its brittleness and insufficient hardness. Certain reinforcing additives are expected to significantly improve the mechanical properties of the cement. It is desirable that these particles should have bioactive properties analogous to those of cement. A slight modification of the material can significantly change its properties, which makes it imperative to investigate experimentally the biological properties of the investigated material.
Fryda Solomonivna Leontyeva
Authors: "ORTHOPAEDICS, TRAUMATOLOGY AND PROSTHETICS" Staff of
Published: October 2021

The article is devoted to the well-known specialist in the field of clinical laboratory diagnostics, biochemist, teacher and organizer, candidate of biological sciences, senior researcher, head of the department of laboratory diagnostics and immunology F. S. Leontieva.
Complex revision hip arthroplasty for aseptic implant instability with 3D-modeling
Authors: Chabanenko Diomyd , Polіvoda Oleksandr , Puhkan Grigory , Vytychak Oleh
Published: October 2021

The increasing number of hip replacement surgeries in the worldwide practice causes the progressive increase in revision cases. The treatment of patients with instability of the hip implants requires the individual approach, taking into account the size of the defect, the loss of bone mass and the structural state of the bone in each case. Objective. To show the technical opportunities of the revision cementless implants in combination with 3D-modeling for the treatment of acetabulum massive defects. Methods. It was shown the cli­nical case of hip replacement surgery of the patient with the aseptic instability of endoprosthesis components. A 3D-model of the pelvis and femur was created on the basis of the СT scan in order to make an analysis of bone tissue defects and to select the exact size of implant components for revision surgery. Results. It was suggested a standardized methodology of the preoperative examination to make the high-tech operation easier and maximally effective. It is necessary not only to take into account the results of the X- ray analysis, but also to pay attention to all changes in the damaged segments. It was shown that the real plastic model make the work of the surgeon easier during all steps of the treatment. The opportunity to use the standard revision components for the restoration of the complex geometrically shaped bone was demonstrated with the good nearest clinical and radiological and functional results. Conclusions. The success of the revision arthroplasty depends on the carefully preoperative planning, the maximum approximation of the parameters of the artificial joint to the anatomical parameters of the patient and biomechanics of the hip join. No less important is the individual recovery program during the postoperative period.
Quality elements of after-school programmes: A case study of two programmes in the Western Cape province of South Africa
Authors: Ndlovu Mdutshekelwa , Simba Precious
Published: October 2021

The qualitative case study reported on here was commissioned and funded by the Western Cape Government (WCG) in partnership with the Cape Higher Education Consortium (CHEC) to inquire into attributes of well performing after-school programmes (ASPs) within the Western Cape provincei of South Africa. The research question of the study was: What quality elements of ASPs can be identified in 2 purposefully selected ASPs in the Western Cape province? In the multiple (double) case study we used interviews and archival data from the 2 ASPs. Using Mott’s Theory of Change (ToC) framework and Socio-Cultural Learning (SCL) theory as analytical lenses, we found that adaptability, strong management, staff commitment, involvement of current and former learners, family involvement, multi-stakeholder partnerships, continuous programme funding, and monitoring and evaluation were central to the success of the ASPs. Upscaling and replication efforts in the province and similar contexts should seriously consider embedding these quality elements in their logic models.
Assessing prospective teachers’ soft skills curriculum implementation: Effects on teaching practicum success
Authors: Macqual Stephen Maren , Mohd Salleh Umi Kalsum , Zulnaidi Hutkemri
Published: October 2021

Soft skills encompassing conscientiousness, lifelong learning, communication, creativity, and teamwork are beneficial to success in work and life. The education policy in Nigeria on teacher education stipulates that students should learn basic soft skills at universities as performance improvement tools for teaching, but for the most part teacher education programmes do not include such skills. The aim of the study reported on here was to assess whether the soft skills curriculum and instruction course has been effectively implemented in university teacher education programmes. This course is theory based designed to inculcate soft skills in would-be teachers within 2 semesters. We used paper questionnaires and performed data analysis by way of partial least square structural equation modelling (PLS-SEM) using SmartPLS software in a non-experimental procedure with a total of 722 prospective teachers. The analysis revealed that prospective teachers gained moderate soft skills, which, in turn, benefited them in classroom control and, ultimately, teaching success in terms of lesson planning, development, and results. It is fair to suggest that the PLS-SEM model shows that participation in the curriculum and instruction course generates different kinds of benefits to teachers at the same time.
The transition of learners to classes for learners with special educational needs from the perspective of the learners, teachers and parents
Authors: Rens Julialet , Louw Hannelie
Published: October 2021

The researchers investigate how learners with barriers to learning experience the transition to classes for learners with special educational needs. The research was conducted at a full-service school in Potchefstroom, North West province, South Africa. Interviews were conducted with current and former teachers as well as the parents of selected participants who were learners in special educational needs (LSEN) classes at the school. Focus group interviews were held with each of the groups of learners. The findings of the study could be divided into intrapersonal factors (emotional development; group pressure; self-image and self-confidence; a feeling of loss; a transition that was traumatic, filled with stress and aggression; level of security; and the inability to hold his or her own in situations) and interpersonal factors (low social skills, the loss of friends, the loss of social status and the feeling that the transition was merely a temporary measure). We concluded that, based on the social and psychological effects of the transition between LSEN- and mainstream classes, teachers and parents need to make better informed decisions about the transition of learners.
Mechanized system rice intensification (MSRI) is boon to farmers to save money and time in rice cultivation in Vizianagaram district of North Coastal Zone of Andhra Pradesh
Authors: Rao M. M. V. Srinivasa , Roy G. S. , Lakshmana K.
Published: October 2021

Paddy is major predominant crop during Kharif in Vizianagaram district of Andhra Pradesh, cultivated in an area of 112353 ha, out of total cropped area of 117608 ha with productivity of 2524 kg/ ha. Farmers grow crop by adopting traditional method of paddy cultivation, use more seed rate, close spacing, late transplanting with over aged seedlings common phenomenon due to erotic rainfall climate change. Scarcity of labour and escalation in labour wages, reduction in labour efficiency are leading to low net returns. In this context DAATT Centre, Vizianagaram district of ANGRAU, in collaboration with Department of Agriculture, Vizianagaram has introduced “Mechanized System Rice Intensification (MSRI). Mechanized system rice intensification (MSRI) is boon to farmers to save money and time. DAATT Centre, Vizianagaram has organized on farm trials (OFTs) in farmer fields in two seasons Kharif, 2015 and Kharif, 2016. MSRI technology in paddy recorded 20.76 per cent yield over normal transplanting method of paddy cultivation during both Kharif seasons. The results from the study showed that the farmers realized the Rs.15038 additional net income due to increased grain yield by 20.76 per cent with reduction of cost of cultivation by Rs.1150, it could be attributed to reduction in manual labour of 3 man labour and 21 women labour per ha and also increase in yield attributes and yield.
Training needs of agro service centre owners and their constraints
Authors: Gaikwad J. H.
Published: October 2021

The most of the agriculture input dealers are related to transfer of agriculture technology. Agriculture inputs dealers may this way perform the function of the “Change agent”. Agriculture input dealers are also playing an important role in increasing agricultural production in the country. The main aim of agriculture input dealers was thus, to provide expert services, advice to farmers and supply of inputs to agriculture according to local needs i.e. quality seeds, fertilizers, pesticides, engineering material and provide the employment to the people indeed an input dealer forms an important bridge between the farmers and the agriculture developmental agencies and is often regarded by the farmers as a “Friend, Philosopher and Guide” and is truly a change agent. Study is designed with specific Objectives: To know the training needs of owners of agro service centre and to study the constraints faced by owners of agro service centre. The study was conducted in Ahmednagar district of the western Maharashtra region, as maximum number of agro service centre owners of agro service centres in this district. Rahuri, Rahata, Shrirampur, Ahmednagar, Sangamner and Kopargaon tahsils selected for study, results are majority of owners (73.33%) had medium level of training need. On the other hand 20 per cent had more level of training need and majority of respondents faced constraints mostly related to overdue from farmers followed by lack of technical assistance, competition with other owners and lack of finance.
Promising integrated farming system crops + Horticulture + Dairy + Poultry developed and demonstrated at farmer’s for doubling tribal farmers income in high altitude tribal area of Andhra Pradesh
Authors: Rao K. Tejeswara , Rao M.M.V. Srinivasa , Nagarajuna D.
Published: October 2021

Farming systems approach introduces a change in farming techniques for attaining food and nutritional security and for maximizing farm income through optimal utilization of resources by a judicious mix of allied enterprises like dairy, small ruminants like goat and sheep, poultry, piggery, fishery, sericulture etc., with crops suitable for the existing agro-climatic conditions and socio-economic status of the farmers. On farm research was conducted in 36 small tribal farmers fields o in high altitude and tribal area of Srikakulam district of Andhra Pradesh state in East Coast Plain and Hills Agro-climatic zone East coast plains, hot, sub humid to semi arid eco region (S7 Cd 2-5). Agro-ecological region with 915 mm rainfall distribution in 55 rainy days. By diversification in all enterprises farmers realized Rs. 83,630, 96,830, 1,04,720 and 1,12,960 gross returns and Rs.57435, 68600, 65080 and 81240 net returns was than the bench mark Rs. 53110 and Rs. 35430 at the additional cost of interventions of Rs. 8515 than the bench mark cost of cultivation Rs. 17680 in 2012-13, 2013-14, 2014-15 and 2015-16, respectively. Net returns are getting doubled from the third year of interventions onwards. The increase income is attributed to increase in income from intervention in paddy crop and cashew crop, introduction of YMV tolerant green gram variety, feeding of supplement feed to the cattle and also the introduction of Vanaraja and Rajshri back yard poultry birds. In addition to this not only due to diversification of existing enterprises, but also introduction of Azolla and nutritional kithen garden, helped the farmer nutritional food, besides reduction in cost of maintenance helped in increase in net returns recorded. By introduction of interventions the cost of cultivation is increased by 63.73 per cent with increase of gross returns by 87.42 per cent and net returns of 99.23 per cent with 13.33 per cent increase in B:C ratio was observed. The area share was allocated 44 per cent to crops, 43 per cent horticultural crops, 1-2 per cent area for other components, these various components the net income was maximum in livestock (44.93%), closely followed by horticulture (37.93 %) and crops (16.14%). Additionally 54 man days were created on an average during four years of introduction of IFS approach due to diversification of enterprises and introduction of few enterprise.
Revisão teórica sobre o potencial da adição do óxido de grafeno em materiais cimentícios
Authors: Rocha Vanessa Vilela , Horta Ricardo Augusto dos Santos , Paula Júnia Nunes de , Ludvig Péter
Published: October 2021

RESUMO O óxido de grafeno tem sido apontado como um material de reforço para compósitos de cimento. Além de ser um material com boa dispersão em água, ele apresenta elevado módulo de elasticidade, elevada resistência à tração, elevada superfície específica e alta condutividade térmica e elétrica. Visando aprofundar o conhecimento acerca do uso do óxido de grafeno em compósitos de cimento, o presente trabalho apresenta uma ampla revisão bibliográfica sobre os efeitos da adição do óxido de grafeno em compósitos de cimento Portland. A metodologia empregada para a seleção dos artigos acadêmicos foi o ProKnow-C, (Knowledge Development Process – Constructivist), ferramenta de revisão literária que permite a evidenciação do estágio atual do conhecimento acadêmico relacionado ao tema de estudo. Por meio desta metodologia de busca e seleção de artigos, foi possível selecionar, a partir de uma amostra bruta de 1354 artigos, os 47 artigos mais relevantes que apresentam as alterações nas propriedades mecânicas, no comportamento reológico e na microestrutura de compósitos de cimento com adição de óxido de grafeno, bem como técnicas de dispersão utilizadas. Dessa forma, as principais conclusões, as lacunas atuais de pesquisa e as oportunidades de estudo foram sumarizadas, constituindo uma base de referência para orientar trabalhos futuros envolvendo o uso de óxido de grafeno para a preparação de compósitos de cimento.
Avaliação do comportamento reológico de pastas de cimento com adição de óxido de grafeno
Authors: Horta Ricardo Augusto dos Santos , Murta Júlia Ferreira , Paula Júnia Nunes de , Calixto José Márcio Fonseca
Published: October 2021

RESUMO A adição de óxido de grafeno (OG) em materiais cimentícios permite a obtenção de compósitos mais resistentes e duráveis, com menor carga de poluentes associada à sua produção. Pesquisas anteriores demonstraram que a adição de nanomateriais à pasta de cimento pode provocar o aumento nos parâmetros reológicos de viscosidade e limite de escoamento. Este estudo teve como objetivo investigar as alterações no comportamento reológico de pastas de cimento devido à adição de OG. De forma a cumprir este objetivo, foram realizados testes com OG produzido e patenteado no CTNano/UFMG (Centro de Tecnologia em Nanomateriais e Grafeno da Universidade Federal de Minas Gerais) nos teores de 0,03% e 0,05%, sobre pastas de cimento de classes CP-III e CP-V. Foram utilizados dois métodos de análise, o mini-slump e a reometria rotacional de fluxo. No ensaio de mini-slump, foram obtidas reduções no raio de espalhamento de 42,94% (CP-III) e de 23,34% (CP-V) em relação às amostras de referência, considerando a adição de 0,05%OG. Para este mesmo percentual de adição e utilizando o reômetro, foram obtidos aumentos na viscosidade de 125,49% (CP-III) e 31,51% (CP-V) e aumentos de 82,24% (CP-III) e 38,87% (CP-V) no limite de escoamento. Ambas as técnicas utilizadas se mostraram eficientes na determinação da influência da adição do OG sobre a reologia das pastas de cimento, e apontaram para um aumento na viscosidade da pasta à medida que uma maior quantidade de OG é incorporada à mistura. A diferença principal entre as técnicas apresentadas está na qualidade dos resultados obtidos. Enquanto a reometria rotacional de fluxo é um método mais sofisticado e produz um relatório de resultados mais completo e preciso, a técnica de mini-slump tem como vantagem permitir a visualização dos efeitos das adições sobre a fluidez e a consistência das pastas de cimento.