bluuebunny/crossref_metadata_2025 huggingface dataset:
Material Origins of Accelerated Operational Wear of RD-33 Engine Blades
Authors: Kozakiewicz Adam , Jóźwiak Stanislaw , Jóźwiak Przemysław , Kachel Stanisław
Published: November 2020

The structural and strength analysis of the material used to construct such an important engine element as the turbine is of great significance, both at the design stage as well as during tests and expertises related to emergency situations. Bearing in mind the conditions above mentioned, the paper presents the results of research on the chemical composition, morphology and phased structure of the metallic construction material used to produce the blades of the high and low pressure turbine of the RD-33 jet engine, which is the propulsion unit of the MiG-29 aircraft. The data obtained as a result of the material tests of the blades allowed, on the basis of the analysis of chemical composition and phased structure, to determine the grade of the alloy used to construct the tested elements of the jet engine turbine. The structural stability of the material was found to be lower in comparison with engine operating conditions, which manifested itself as a clear decrease in the resistance properties of the blade material. The results obtained can be used as a basis for analyzing the life span of an object or a selection of material replacements, which enable to produce the analyzed engine element.
Citation review of Human-Machine Collaboration in Virtual Reality for Adaptive Production Engineering by de Giorgio et al.
Authors: de Giorgio Andrea , Onori Mauro
Published: November 2020

This article argues that despite a citation review is a rarely used research tool, this can be very useful to assess the impact of new research topics, both from the future research direction and the bibliometric perspectives. An explorative study is presented around the research area marked as Industry 4.0 with the conference paper mentioned in the title of this citation review. Even though the given reference paper is relatively recent, there are already twenty-seven citations listed among three different scholar databases. These are Google Scholar, ResearchGate and Semantic Scholar. In light of this, the article provides a bibliometric confirmation and analysis for the progression of the line of research adopted by de Giorgio et al. in the exploration of non-traditional methods using virtual reality technology and human-robot collaboration for adaptive applications in Industry 4.0. Furthermore, it represents a model for the authors’ self-development and an example of an unconventional approach to scientific work that may help improve related bibliometric research and scholar database strategies to index new articles and topics in the future.
ACE2 Nascence, Trafficking and SARS-CoV-2 Pathogenesis: The Saga Continues
Authors: Badawi Sally , Ali Bassam
Published: November 2020

With the emergence of the novel corona virus SARS-CoV-2 since December 2019, more than 43 million cases have been reported worldwide. This virus has shown high infectivity and severe symptoms in some cases leading to over 1 million deaths globally. Despite the collaborative and concerted research efforts that has been made, no effective treatment for COVID-19 (corona virus disease-2019) is currently available. SARS-CoV-2 uses the angiotensin converting enzyme 2 (ACE2) as an initial mediator for viral attachment and host cell invasion. ACE2 is widely distributed in human tissues including the cell surface of lung cells which represent the primary site of the infection. Inhibiting or reducing cell surface availability of ACE2 represents a promising therapy for tackling COVID-19. In this context, most ACE2–based therapeutic strategies have aimed to achieve this through the use of angiotensin converting enzyme (ACE) inhibitors or neutralizing the virus by exogenous administration of ACE2. However, through this review, we present another perspective focusing on the subcellular localization and trafficking of ACE2. Membrane targeting of ACE2, shedding and its cellular trafficking pathways including internalization are not well elucidated. Therefore, hereby we present an overview on the fate of newly synthesized ACE2, its post translational modifications, what is known of its trafficking pathways. In addition, we highlight the possibility that some of the identified ACE2 missense variants might affect its trafficking efficiency and localization and hence may explain some of the observed variable severity of SARS-CoV-2 infections. Extensive understanding of these processes is necessary to evaluate the potential use of ACE2 as a credible therapeutic target.
Ruminal Ecology, Microbial Protein Synthesis and Milk Production in Lactating Dairy Cows Fed Glycerin-Based Diet: A Comparison Study on Chitosan Sources Supplementation
Authors: Seankamsorn Anuthida , Cherdthong Anusorn , So Sarong , Wanapat Metha
Published: November 2020

The study compared the influence of chitosan sources on rumen fermentation, methane emission and milk production in lactating dairy cows fed a glycerin-based diet. Six, lactating Holstein-Frisian crossbreeds (410 ± 5.0 kg BW, 120 ± 21 day-in-milk), were arranged in a 3 x 3 replicated Latin square design. In addition to control, a 2% chitosan extract supplement and a 2% commercial chitosan supplement of dry matter intake were the treatments. The results denoted that no significant differences on daily dry matter, nutrients or estimated energy intake were noted when cows received different sources of chitosan. Nutrient digestibility was not influenced differently by extraction based or commercial chitosan supplements. The pH, temperature, ammonia nitrogen, blood urea and microbial count were similar among treatments. The different sources of chitosan supplements did not change the totals of volatile fatty acids, acetate and butyrate; in contrast, different chitosan sources influenced (P<0.05) propionate content. The ruminal acetate to propionate ratio was markedly (P<0.05) reduced with chitosan supplement, but no change appeared between sources of chitosan. At 4 hours after feeding, the methane estimation signiﬁcantly decreased with the addition of chitosan supplementation (P<0.05) compared to the control group. The purine derivatives and microbial protein synthesis were not altered by the treatments. No significant differences existed on milk yield, milk composition or milk urea nitrogen when cows received different sources of chitosan (P>0.05). In sum, supplementing extracted chitosan showed more potential than did commercial chitosan for enhancing economic efficiency and recycling shrimp residues, therefore, reducing environmental waste.
Application of Fuzzy Decision Support Methods for Recruiting
Authors: Sivakova Tatiana Vladimirovna , Sudakov Vladimir Anatolievich , Titov Yuri Pavlovich
Published: November 2020

The solution of the problem of personnel selection by methods of fuzzy sets is considered. The description of the stages of personnel selection and the connection of these stages with the methodological foundations of the theory of decision-making is given. It is shown how to build a tree of aggregation of criteria for personnel decisions, how the search for personnel and fuzzy assessment of candidates for vacant positions occurs. Methods for multi-criteria fuzzy assessment of candidates based on fuzzy judgments of decision-makers are proposed. The software is implemented as a web service on the WS-DSS. This approach is useful when looking for employees to perform both simple and complex work, including work in the field of scientific and technical development.
Statistical Analysis of Building Damage from the 2013 Super Typhoon Haiyan and its Storm Surge in the Philippines
Authors: Chaivutitorn Tanaporn , Tanasakcharoen Thawalrat , Leelawat Natt , Tang Jing , Caro Carl Vincent C. , Lagmay Alfredo Mahar Francisco A. , Suppasri Anawat , Bricker Jeremy D. , Roeber Volker , Yi Carine J. , Imamura Fumihiko ,   School of Management, National Taiwan University of Science and Technology 43, Sec. 4, Keelung Road, Taipei 106, Taiwan,   Department of Industrial Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand,   Disaster and Risk Management Information Systems Research Group, Chulalongkorn University, Bangkok, Thailand,   International School of Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand,   Viosimos Integrated Planning Consultants Inc., Bagumbong Caloocan City, The Philippines,   University of the Philippines Diliman, Manila, The Philippines,   International Research Institute of Disaster Science (IRIDeS), Tohoku University, Miyagi, Japan,   Department of Hydraulic Engineering, Delft University of Technology, Delft, The Netherlands,   Université de Pau et des Pays de l’Adour, Anglet, France,   R. Park & Associates Inc., Ontario, Canada
Published: November 2020

In November 2013, Super Typhoon Haiyan (Yolanda) hit the Philippines. It caused heavy loss of lives and extensive damages to buildings and infrastructure. When collapsed buildings are focused on, it is interesting to find that these buildings did not collapse for the same reasons after the landfall of the typhoon and storm surge. The objective of this study is to develop a statistical model for building damage due to Super Typhoon Haiyan and its storm surge. The data were collected in collaboration with Tanauan Municipality, the Philippines. The data for the inundation map were obtained by field surveys conducted on-site to determine the cause of the damages inferred from satellite data. The maximum wind speed was derived from the Holland parametric hurricane model based on the Japan Meteorological Agency (JMA) typhoon track data and the inundation depth of storm surge was calculated using the MIKE model. Multinomial logistic regression was used to develop a model to identify the significant factors influencing the damage to buildings. The result of this work is expected to be used to prepare urban plans for preventing damage from future storms.
Policy Implementation: Teachers’ Role as First Responders in Emergencies and Disasters
Authors: Hyder Shabir , Manzoor Adnan Fazal , Iqbal Muhammad Amjad
Published: November 2020

During the past decade, the schoolchildren faced many disasters and emergencies originating from natural and man-made sources. The safety of schoolchildren rests with school management and teachers. This study aimed to assess teachers' awareness with regard to disaster prevention and health, safety, security, and environment (HSSE) policies at primary schools in Pakistan. In addition, it explores the suitability of teachers to perform as emergency handlers in the absence of school nurses and resource officers (SROs). The study involved a qualitative study, based on open-ended interviews from a sample of 25 school teachers. Methodology triangulation was applied to reduce bias. Results revealed that the majority of teachers do not know about national policies related to school safety and security. Most of the teachers had been assigned additional roles as safety officers at the school, though they lack relevant training. Moreover, neither safety nor security aspects are incorporated into national educational policy. This study was the first study on Pakistani teachers’roles as emergency first responders. With the highest rate of attacks on educational institutions globally, the region still lacks a coherent policy structure. The study found numerous inconsistencies in public policies. It seeks to contribute to the literature to better understand the educational safety environment at both the ground and policy levels.
La ciudad desigual en Palma (Mallorca): geografía del confinamiento durante la pandemia de la COVID-19
Authors: González Pérez Jesús M. , Piñeira Mantiñán María José
Published: November 2020

La crisis consecuencia de la pandemia de la COVID-19 está poniendo de manifiesto las débiles estructuras en las que sustentaba la supuesta recuperación económica y las fuertes desigualdades socio-urbanas sobre las que se fundamenta esta recuperación. La enfermedad es un indicador de desigualdad pero, en el contexto de la COVID-19, también lo son las medidas para su contención. El objetivo de este artículo es estudiar la desigualdad urbana en Palma, focalizando la investigación en uno de los barrios más empobrecidos y vulnerables de la ciudad, son Gotleu, durante la etapa del confinamiento de la COVID-19. La metodología combina dos tipos de análisis, uno a escala de ciudad y otro de barrio. Para esto, primero elaboramos un mapa social de la desigualdad de Palma a partir de un Análisis de Componentes Principales. Segundo, realizamos una encuesta sobre la calidad de vida durante el confinamiento a residentes de son Gotleu. El trabajo concluye manifestando, por un lado, la existencia de importantes brechas sociales y económicas en Palma. Por otro, las débiles condiciones sociales, económicas y de vivienda a las que se enfrenta son Gotleu para hacer frente a una crisis (sanitaria y económica) de esta envergadura.
Difusão do conhecimento por minicurso
Authors: Ykeizumi Lara , Ribeiro Eduardo
Published: November 2020

Este trabalho abordará sobre a importância de um minicurso como instrumento de difusão do conhecimento em um mestrado profissional. Esta atividade está dentro do contexto do debate de pensar em estratégias efetivas na popularização do conhecimento, assim, ampliando a promoção da qualidade de vida das pessoas. A proposta de minicurso se mostrou exitosa. A ideia de trazer o debate de uma parte da pesquisa com a comunidade cientifica, agregou leituras e críticas para o amadurecimento da pesquisa.
Application of Nanosilica in Glycerol-Based Drilling Fluid for Shale Formations
Authors: Lyu Chao , Hao Shuqing , Yang Liang
Published: November 2020

In this study, we perform several tests to develop a formula of glycerol-based drilling fluid that is suitable for shale formations with severe wellbore instability problems. Drilling fluids with varying combinations of nanosilica, glycerol, sodium carboxymethyl cellulose (Na-CMC), and xanthan gum (XG) in organic soil glycerol-based slurry are tested, and the effects of nanosilica on the swelling of shale samples and the lubricity of drilling fluids are also investigated to verify the feasibility of designed drilling fluids. The experimental investigations reveal that the values of apparent viscosity (AV), plastic viscosity (PV), and yield value (YP) of the optimal formulation meet the rheological parameters required for the drilling of shale formations. The AV and PV values of drilling fluid with 55:45 glycerol/water ratio are lower than those of drilling fluids with other glycerol/water ratios. A higher XG content means higher YP value in the experiment and 0.4% XG is suitable for the glycerol-based drilling fluid to prevent the collapse of the shale wellbore. There is a critical nanosilica content threshold (0.5%), and the filtration loss (FL) increases gradually when this threshold is exceeded due to the agglomeration of nanosilica. The nanosilica coated on clay particles in shales because of the formation of hydrogen bonds results in a decrease in permeability of shale formations. The swelling of shale through hydration is greatly reduced by 37% and the sticking coefficient of drilling fluid is reduced by 28% when 0.5% nanosilica is added. The addition of nanosilica to glycerol-based drilling fluid is significant to deal with the wellbore instability problems in troublesome shale formations.
AN UNUSUAL CASE OF EXTRAGINGIVAL PYOGENIC GRANULOMA ASSOCIATED WITH A FENESTRATION DEFECT
Authors: Ahuja Annapurna , Kumari Sharmila , Mishra Aiswarya , Minz Ruchi
Published: November 2020

Pyogenic granulomas are relatively common benign mucocutaneous lesions found in the oral cavity or extra orally; The first case was reported in 1844 by Hullihen and the term “pyogenic granuloma” or “granuloma pyogenicum” was coined only in 1904 by Hartzell. It is a reactive tumor like lesion which arises in response to various stimuli such as chronic low grade irritation[1], trauma and hormonal imbalance[2]. It's an inflammatory hyperplasia commonly seen in the oral cavity caused due to chronic irritation and trauma. In this case report we present a case of pyogenic granuloma associated with gingival/bony fenestration caused due to chronic irritation by exposed root tip.
RARE OCCURRENCE OF LOBULAR CAPILLARY HAEMANGIOMA IN MAXILLARY POSTERIOR SEGMENT INVOLVING THE ALVEOLAR MUCOSA
Authors: Suraj Pandey  , Ashish Saini  , Sunil Chandra Verma  , Pranav Kumar Singh
Published: November 2020

Pyogenic granuloma (PG) is one of the inflammatory hyperplasias seen in the oral cavity. This term is a misnomer because the lesion is unrelated to infection and in reality arises in response to various stimuli such as low-grade local irritation, traumatic injury or hormonal factors. PG is predominantly seen in the second decade of life in young adult females. PGs generally are soft, painless, and deep red to reddish-purple in colour. It shows a striking predilection for the maxillary anterior area. Also, the majority of PGs are found on the marginal gingiva with only 15% of the tumours on the alveolar part. There are two kinds of PG namely lobular capillary hemangioma (LCH type) and non-LCH type, which manifest as distinct entities and differ in many aspects. Although excisional surgery is the treatment of choice for it, some other treatment protocols such as the use of Nd:YAG laser, flash lamp pulsed dye laser, cryosurgery, intralesional injection ofethanol or corticosteroid and sodium tetradecylsulfatesclerotherapy have been proposed. We hereby present a rare case report of lobular capillary hemangioma occurring in the maxillary posterior region. Also, contrary to its site specificity, it involved the attached gingiva and alveolar mucosa, thereby presenting a diagnostic dilemma. The various differences between the LCH and Non-LCH type PG are also discussed emphasising their different pathways of evolution.
AN IN VITRO STUDY TO ASCERTAIN THE TRANSVERSE STRENGTH OF DENTURE BASE RESIN REINFORCED WITH TWO DIFFERENT FIBERS AND THEIR COMBINATION
Authors: Abhinav Agarwal  , Manesh Lahori  , Dharmesh Kumar
Published: November 2020

Purpose: The purpose of this study was to compare the transverse strength of denture base resin reinforced with two distinct fibers and their combination with the denture base resin without any reinforcement. MaterialsandMethod: Atotal40testsamplesofclearheatcureresinwerefabricatedwiththehelpofa customized metallic die and divided in to four groups- Group1: samples fabricated with clear acrylic resin without any reinforcement(Control group),Group2: samples reinforced with carbon fiber epoxy resin composite block, Group3: samples reinforced with glass fiber epoxy resin composite block, Group 4: samples reinforced with combination of carbon and glass fiber epoxy resin composite block. After finishing and polishing all the samples were having final dimension of 3 cm × 1 cm × 0.3cm with a ±0.02 error measured with digital vernier caliper. Samples were immersed in water for 7 days in an incubator. A 3-point bend test was done in a universal testing machine, and load to fracture was recorded (MPa). Statistical analysis was performed using one way analysis of variance (ANOVA) followed by tukey HSD post-hoc test to compare mean transverse Strength in four groups.

Results: Group 2 and group 4 showed highest strength with significant difference with all other groups and non-significant with each other. Group1(control group) showed lowest transverse strength among all the groups.

Conclusion: carbon fiber and glass fiber alone provided either good transverse strength or good esthetics respectively while unique combination of carbon and glass fiber epoxy resin composite significantly increased the transverse strength of acrylic resin along with good esthetics.
EVALUATION OF PATIENT'S PERCEPTION AND HEALING, FOLLOWING CONVENTIONAL AND PARALLELING TECHNIQUE OF FRENECTOMY USING SCALPEL AND OTHER MODALITY
Authors: Gupta Dr. Ira , Saranik Sarkar  , Rohit Gupta  , Nidhi Gupta  , Janardhana Amaranath B. J.  , Mohd. Amir Khan
Published: November 2020

Background: Frenum that encroaches on the margin of the gingiva may interfere with plaque removal and can lead to gingival recession and midline diastema. Thus, to maintain proper oral hygiene and prevent gingival recession, frenectomy is done. Frenectomy can be accomplished by conventional frenectomy technique, which has certain disadvantages. To overcome those drawbacks, paralleling technique of frenectomy has been introduced. Both the techniques can be performed by using various treatment modalities.

Aim: The purpose of this clinical study was to compare the bleeding during surgery, post-operative wound healing and patient's perception towards the conventional frenectomy technique with scalpel, paralleling frenectomy technique with scalpel and paralleling technique with electrocautery.

Materials and method: A total of 30 subjects with gingival or papillary frenal attachment were selected and equally divided into three groups. Group 1 was treated by conventional technique with scalpel, Group 2 by paralleling technique with scalpel and Group 3 by paralleling technique with electrocautery. Various parameters such as bleeding during surgery, patient's perception towards the various techniques and post-operative wound healing were evaluated.

Results: The results showed that bleeding during surgery was minimum in group 3 as compared to other two groups. Patient's perception towards paralleling technique with scalpel, was found better than the other groups. At 7th day, though there was a difference in the healing but at 21st day wound healing was almost similar in all the three groups.

Conclusion: Based on our findings and clinical outcome, paralleling technique with scalpel provided better patient's perception and an efficient and satisfactory option for frenectomy.
INVESTIGATION ON SPOT BOOKING AND DYNAMIC OCEAN FREIGHT MODELLING FOR HIGHER SPACE UTILISATION ON ULTRA LARGE CONTAINER VESSELS
Authors:   Faculty of Maritime Studies and Transport, University of Ljubljana, Pot pomorščakov 4, 6320 Portorož, Slovenija, Beškovnik Bojan
Published: November 2020

The article deals with the very topical issues of the use of spot ship’s space booking and the dynamic adjustment of ocean freight, according to the demand and availability of cargo space on container ships. Container lines are facing the challenges of filling the growing container ships, which also raises the difficulty of managing the overbooking. Two research hypothesis; that (H1) freight forwarders have concerns about a new spot booking mode and a dynamic way of formulating ocean rates; and that (H2) freight forwarders feel threatened by Container Lines (CL) to some extent to phase them out from the organization of intermodal transport chains due to the introduction of larger ships and the risk of low space occupation, are followed by the research. A survey between freight forwarders and NVOCCs (Non-Vessel Operating Common Carrier) on a global scale provides guidelines for the further development of CL model for the booking process and the formation of ocean rates because the results expose how new ways of working have a greater impact on the operational and commercial work between CL, freight forwarders and NVOCCs. According to the obtained result, the article proposes a three-step approach to be developed by CL that would bring freight forwarders and NVOCCs closer to a new way of working, reduce business risks, and, as a result, provide leverage to achieve ship space optimization and lower space pressure on container terminals. The study provides new understandings in building new operational models for efficient maritime logistics and brings novelty to the scientific community by defining descriptive gaps in changing strategic and operational approach for ship’s cargo space optimization.
RESEARCH ON THE MANUFACTURING MAGNESIUM FROM THANHHOA DOLOMITE BY PIDGEON PROCESS
Authors: Vu Viet Quyen , Thu Trang Vu Thi , Duong Nam Nguyen , Ngoc Binh Duong , Duc Huy Tran
Published: November 2020

The magnesium and magnesium alloys has applied widely in different industrial aspects in Vietnam in the modern life. Especially, the products from magnesium alloys implementing in the automotive have increased rapidly since the car elements tend to be generated by the light alloys in order to save the fuel. However, in the current time, Vietnam has no factories to produce the magnesium to adapt the domestic demand although it owns an enrich resource of raw materials. This research indicates the possibility of using the dolomite ore in Thanhhoa – Vietnam to make the magnesium as well as evaluate the primary factors like recovering temperature, reducing agent rate, recovering time having effect on the reduction efficiency of Thanhhoa dolomite by metallothermic method in vacuum (Pidgeon Process). This is basic process, low investment and suitable for the small and medium scales in Vietnam. The experiment includes heating, indicating the chemical ingredients and recovering experiment on the dolomite after calcination (dolime) by using ferrosilicon. The thermodynamic model is created to estimate the recovering efficiency in the Pidgeon. The result shows that the CaO/MgO molar ratio of calcination dolomite in Thanhhoa is nearly 1.5 which is suitable to produce magnesium in the case of highly-required efficiency and pureness. Besides, the result from the furnace of the experiment is lower than the one in the model. The samples are set up to check the influence of the rate of ferrosilicon in the compound. The result indicates that the ideal efficiency reaches 85 % with 30 % ferrosilicon. Moreover, the study confirms that the optimal operating conditions in this process are recovering during three hours at 1200 °C and 100 Pa pressure. This result proves the potential application of Thanhhoa dolomite in the industry suitable with the current condition in Vietnam
FEATURES OF FINDING OPTIMAL SOLUTIONS IN NETWORK PLANNING
Authors: Domina Olena
Published: November 2020

The object of research is a test network diagram, in relation to which the task of minimizing the objective function qmax/qmin→min is posed, which requires maximizing the uniformity of the workload of personnel when implementing an arbitrary project using network planning. The formulation of the optimization problem, therefore, assumed finding such times of the beginning of the execution of operations, taken as input variables, in order to ensure the minimum value of the ratio of the peak workload of personnel to the minimum workload.

The procedure for studying the response surface proposed in the framework of RSM is described in relation to the problem of optimizing network diagrams. A feature of this procedure is the study of the response surface by a combination of two methods – canonical transformation and ridge analysis. This combination of methods for studying the response surface allows to see the difference between optimal solutions in the sense of "extreme" and in the sense of "best". For the considered test network diagram, the results of the canonical transformation showed the position on the response surface of the extrema in the form of maxima, which is unacceptable for the chosen criterion for minimizing the objective function qmax/qmin→min. It is shown that the direction of movement towards the best solutions with respect to minimizing the value of the objective function is determined on the basis of a parametric description of the objective function and the restrictions imposed by the experiment planning area. A procedure for constructing nomograms of optimal solutions is proposed, which allows, after its implementation, to purposefully choose the best solutions based on the real network diagrams of your project
CALCULATION OF THE INSTANT MODEL OF SOLAR RADIATION DISTRIBUTION ON CURVED SURFACES IN HIGH-RISE BUILDINGS
Authors: Krivenko Olga , Kulikov Peter , Zaprivoda Andrey , Zaprivoda Vitaliy
Published: November 2020

The aim of research is to simulate the zones of solar radiation on the curved surfaces of the shells of high-rise buildings for the effective use of renewable solar energy. An urgent task is the development of tools that can substantiate the decision-making by designers about the location of solar thermal devices in the energy-efficient design of curvilinear high-rise buildings. The main attention is paid to high-rise buildings, is actively growing in modern megalopolises and requires a significant energy resource. To optimize the integration of solar thermal devices in high-rise buildings, it is important to take into account a set of design parameters, including parameters of surface shape and location in space. A feature of curved surfaces, considered in the study, is their aerodynamic properties, which provide them with the advantage of choosing among modern high-rise buildings. At the same time, the complexity of setting the parameters of a curved surface to determine the zones of solar radiation for the effective use of regenerative solar energy lies in providing reliable and convenient tools for optimizing decision-making.
The study proposes an application of the method based on a discrete geometric model of solar radiation input on the surface of the shells of high-rise buildings, described by compartments of curved geometric surfaces. As a result of modeling, let’s obtain a family of lines of the same level of solar radiation on a certain curved surface for the given parameters of time and geographic location. As an example of simulation modeling, the performed calculations of the instantaneous model of the distribution of solar radiation on the compartments of the curved surfaces of an ellipsoid of revolution, hemisphere, hyperbolic paraboloid. On the basis of the proposed model for the distribution of solar radiation over curvilinear surfaces of buildings, the influence of factors arising in the design process is investigated: changes in the geometric parameters of the surface shape, orientation to the cardinal points, the formation of zones of its own shadow on surfaces. Calculations were performed and instantaneous solar radiation zones were constructed on the surfaces of a hemisphere, a hyperbolic paraboloid with various geometric parameters, taking into account different orientations relative to the cardinal points, and determining the zones of its own shadow.
At this stage of the study, the result is an algorithm for constructing zones of different levels of solar radiation on curved surfaces of high-rise buildings. The advantage of the algorithm is the ability to analyze the results of changes in the design parameters of the surface of a high-rise building when placing solar systems on them. The proposed approach will provide a basis for automating the modeling process, will help expand the scope of solar systems in high-rise construction and increase the efficiency of their work
DEVELOPMENT AND OPTIMIZATION OF AN ULTRA WIDEBAND MINIATURE MEDICAL ANTENNA FOR RADIOMETRIC MULTI-CHANNEL MULTI-FREQUENCY THERMAL MONITORING
Authors: Sedankin Mikhail , Leushin Vitaly , Gudkov Alexander , Sidorov Igor , Chizhikov Sergey , Mershin Lev , Vesnin Sergey
Published: November 2020

The article is devoted to the development of a printed ultra-wideband miniature antenna that can be used for microwave radiometry. An antenna design with a ring-shaped radiator has been proposed, which provides reception of microwave radiation from biological tissues in the 1800–4600 MHz range. The results of mathematical modeling of the antenna electromagnetic field in biological tissues using the finite difference time domain (FDTD) method are presented. Optimization of the antenna design has been carried out to ensure acceptable matching parameters and optimal antenna functionality. The developed antenna has a height of 6 mm and a calculated mass of 5 g; it is planned to manufacture a dielectric substrate based on PDMS polymer with the addition of barium titanate. The issues of calculating the antenna parameters (measurement depth, resolution and distribution of radiation power over the volume of biological tissue, sensitivity, etc.) are considered. The research results and design parameters of the developed antenna demonstrated the effectiveness of the new antenna and the possibility of its adaptation to the object of research. Considering the presence of an ultra-wide band and miniature dimensions, the antenna can be a sensor of a multi-frequency multi-channel microwave radiothermograph
IMPROVEMENT OF THE ELECTRICAL PROPERTIES OF SYNTHETIC LIQUID DIELECTRIC FOR PULSE CAPACITORS
Authors: Yadigar Abdullayeva Maya , Habibov Ibrahim Abulfas
Published: November 2020

An increase in electricity generation is possible not only through the construction of power plants, but also through the creation of fundamentally new energy sources. One of the problems of modern electrical engineering is to ensure the reliability of the operation of capacitors at electric field strengths exceeding I50-200MV. In the domestic and foreign capacitor industry, for heavy pulse modes, castor oil (CO) is used as a liquid impregnation. The development of a method for producing a substitute for natural castor oil, which is a universal impregnating liquid in capacitors, is an urgent problem in the electrical industry. Thus, we have developed a method for the production of acetoxymethyl-w.hexyl-o-xylene, the electrophysical properties of which make it possible to use it as an environmentally friendly and promising substitute for natural castor oil. However, there was a problem of stabilization, since compounds of the ester type have (as impregnating liquids in capacitors) a disadvantage, which consists in their sensitivity to light hydrolysis and atmospheric effects. Ester exhibits high stability with respect to air up to 200 °С, therefore, inhibition by the addition of antioxidants is required is not new.
In this work developed the basic electrophysical properties of the ester-acetoxymethyl-secondary hexyl-o-xyleole; methods for its purification and stabilization. There were chosen the adsorption method of thermo-oxidative stabilization to clean dielectric fluid from conductive impurities.
As a result of the electrophysical characteristics of the acetoxymethyl-secondary hexyl-o-xyleole ester, as well as the method of its purification using alumina, and hydrogenation on a catalyst representing 0.2 % palladium on alumina and stabilization using additives NG-2246. As a result of the research, it was possible to obtain an ester with improved electrophysical parameters
STUDY OF BONE MARROW ASPIRATE INJECTION EFFECT ON DENERVATED MUSCLE ACCORDING TO ELECTROMYOGRAPHY STUDIES
Authors: Strafun Serhii , Gaiko Oksana , Halii Yulianna , Lysak Andrii
Published: November 2020

The aim. To study in experiment the effect of bone marrow aspirate injection on the course of denervation-reinnervation processes in skeletal muscle using neurophysiological research method. Materials and methods. Experimental study was performed on 36 mature rabbits weighing 3-4 kg. Experimental model of the peripheral nerve acute injury and neurorrhaphy is taken as a basis. Animals were divided into 4 groups of 9 animals per group (3 animals for each experimental period). At 8, 12, and 16 weeks after surgery, all rabbits underwent needle EMG of the target muscles (m. gastrocnemius, and m. tibialis anterior) to study denervation-reinnervation changes. Results. Results of target muscles electromyographic examination are shown. As norm, we took motor unit potentials parameters, which were registered during the study of contralateral (not operated) pelvic limbs. Largest number of registered MUPs at different stages of the denervation-reinnervation process was observed, and was significantly higher (α = 0.07) in the groups in which bone marrow aspirate was injected in relation to group without bone marrow aspirate injection. Changes in the parameters of the registered MUPs in all groups corresponded to the general characteristics of the denervation-reinnervation process. Conclusions. Injection of bone marrow aspirate into the target muscles during surgery and in the early stages of reinnervation (in experimental study it is 7 weeks after surgery) – reliably (α = 0.07) promotes improvement of reinnervation processes in muscles, which is manifested by registration of more motor unit potentials.
Structured personal conflict as a main determinant of intragroup conflict: a study in Mexico
Authors: Llanos Luis , Granados Fernando
Published: November 2020

Managers can spot and target the common driving forces of conflicting employees to ensure their efficiency and productivity. The aim of this research is to provide evidence for the existence of a personal profile, named in this work Structured Personal Conflict, which is present in intragroup conflicts, traditionally studied based on the factoring of conflicts of processes, results and relationships. More than 400 questionnaires were distributed by mail among workers from different organizations and jobs in Mexico, the methodology used the information of 201 usable questionnaires. Various goodness-of-fit tests obtained were applied and rival models were compared using Confirmatory Factor Analysis (AFC). As a result, it was found that structured personal conflict can be estimated from the intragroup conflicts of processes, results and relationships, and that it has a greater explanatory power than either of them individually. The importance of structured personal conflict in the personnel selection and in the performance of teams should be emphasized.
Competitive features of country associations based on the Global Competitiveness Index: the case of the United States – Mexico – Canada Agreement
Authors: Verhun Volodymyr , Pryiatelchuk Olena , Zayats Olena
Published: November 2020

Modern architecture of the world economy is determined not only by the indicators of development of individual national economies and not only by their individual efforts, but also by coordinated efforts of several countries, such as trade agreements. One of such agreements that should lead to freer market relations, fairer trade and sustainable economic growth in the region, better resolution of international disputes, environmental protection, intellectual property protection, etc., is the United States – Mexico – Canada Agreement (USMCA). The aim of this paper is an attempt to analyze the level of global competitiveness of intergovernmental associations (agreements) as influential participants in the international market. To do this, the concepts of “competitive power of the country” and “competitive power of international integration groups” are compared with the concept of firm competitiveness. The competitiveness of the country association was analyzed through the example of the USMCA based on The Global Competitiveness Report 2019 and The Global Competitiveness Index 4.0. used in it. The paper also examines the global challenges and obstacles affecting the level of competitiveness and competitive advantage that each country receives when participating in an international integration agreement. This analysis helps explain real competitive processes in the global economy.
Mathematical modeling of the solution to the problem of plate bending given various fastenings along the contour and various loads
Authors: Toibayev Serikbay , Uderbayeva Assemgul , Bidakhmet Zhanar , Rakhmatulina Ayaulym , Zhauyt Algazy
Published: November 2020

The classical equations of plate bending in various fastenings along the contour and various loads are considered. Using the decomposition method, three auxiliary problems are formulated to determine the deflection of the plate. The task is to determine the individual terms of the decomposition coefficients anmi from the individual terms of the load series. Then the system of algebraic equations is obtained to determine anmi. If the plate contour is pivotally fixed along the contour, then the system of equations takes a known form and the expression for the deflection function is explicitly found. Approximate analytical solutions are obtained for the functions of deflections, internal force factors and stresses under various boundary conditions of the plate.
Biped dynamic walker with alternate unpowered and partially powered steps in a gait cycle
Authors: Yadav Krishna Prakash , R Prasanth Kumar
Published: November 2020

The biped dynamic walker considered in this paper has three actuators - two at the ankle joints and one at the hip joint. We consider the case of one of the two ankle actuators at fault. Despite having only two actuators operational, we show that successful gait is possible for a typical case of virtual passive dynamic walking. We analyze such gaits for local and global stability for a virtual slope and for the cases of completely unpowered or partially powered alternate steps. It is shown that completely unpowered alternate steps are preferred over partially powered alternate steps in the case of virtual passive dynamic walking for global stability, and the other way for local stability.
Performance of a granular activated carbon biologically active filter (GAC-BAF) for removing microcystin-LR (MC-LR) from eutrophic water
Authors: Xu Wei , Kong Meijun , Song Jie , Zhang Zhen
Published: November 2020

Microcystin-LR (MC-LR) removals linked with empty bed contact time (EBCT), temperature and backwash strategies are important for biologically active filter (BAF) application but remain not entirely clear. In addition, there is still a lack of understanding about the bio-regeneration of MC-LR adsorption capacity in a BAF. This study examined MC-LR removals by a granular activated carbon-biologically active filter (GAC-BAF) as a function of EBCT, temperature, and backwash strategies. Results demonstrated that the optimum EBCT (1.2 h for this study) likely depended upon an optimum superficial velocity as well as the GAC column height. A superficial velocity not greater than 0.5 m/h was deemed appropriate according to this research. The MC-LR removals achieved at the optimum EBCT reached 54.8%–72.0%. A higher temperature resulted in a greater MC-LR removal; adsorption might contribute to effective MC-LR removal by the GAC-BAF at a lower temperature. A strategy (Air + air-water + water) was suggested as an optimal backwash strategy for GAC-BAFs in terms of MC-LR removal. A comparison of the effectiveness of the experimental GAC-BAF in continuous and discontinuous operations on MC-LR removals was conducted, from which indirect evidence for bio-regeneration of MC-LR adsorption capacity of the GAC was obtained.
Sustainable industrial wastewater reuse using ceramic nanofiltration: results from two pilot projects in the oil and gas and the ceramics industries
Authors: Beery Matan , Pflieger Christian , Weyd Marcus
Published: November 2020

The federal research project, PAkmem, deals with the recycling of industrial wastewater. The aim of the project is to develop and pilot an innovative integrative process for produced water treatment in the oil and gas industry utilizing flotation and ceramic micro-nano-membrane filtrations (MF-NF membranes) as well as the wastewater treatment of the ceramic industry with ceramic NF-membranes and electrodialysis (ED). The process utilized should remove fine particles, organic matter and divalent ions in order to make the water dischargeable or reusable (direct disposal or reuse as process water in the ceramic industry and the enhanced oil recovery reinjection in the oil and gas industry in which the water is conditioned in order to increase the oil production yield). Three pilot plants were designed and built according to strict safety standards and were operated on industrial manufacturing sites in Germany in 2019. Two innovative optical fine particle measuring techniques (inline and online) have been specially adapted for the project and integrated into the pilot plants. The results show promising technical potential for the use of ceramic membranes in the above-mentioned applications.
ESTRATÉGIA DE TELEMONITORAMENTO PARA EXTENSÃO UNIVERSITÁRIA
Authors: Santos Eufrásio Laiane , De Oliveira Anunciação Jaciara , Amilton Ameida Silva Thierre , Gomes Magalhães Adriana
Published: November 2020

O estudo objetivou relatar a escolha do telemonitoramento em um projeto de extensão universitária, bem como sua importância, frente a realidade da pandemia do coronavirus. Trata-se de um relato de experiência que contou com a participação de 5 alunos de fisioterapia e 2 docentes da área de saúde da mulher. O delineamento da ação foi dividido em: planejamento entre docentes, detalhamento das ações e planejamento com discentes e docentes. Houveram 2 reuniões de planejamento pelas docentes, sequenciamento das atividades com escrita do projeto e posterior discussão com os discentes sobre as ações. Foram realizados 5 atendimentos virtuais durante um mês, supervisionados pelas docentes. Ao final de cada atendimento foram realizadas reuniões de reorganização. Conclui-se que no processo de decisão e execução do projeto, foi essencial o planejamento em equipe, agregando valor para a universidade e comunidade.

Palavras-chaves: Educação em saúde. Fisioterapia. Cuidado Periódico. Universidades.
Influências da Pandemia Covid-19 Sobre a Extensão Tecnológica num Instituto Federal: Análise Preliminar
Authors: Zaak Saraiva Illyushin , Butzen Eduardo , Morejon Camilo Freddy
Published: November 2020

A pandemia Covid-19, com espantosos 3,4 milhões de infectados até 04 de maio de 2020, tem trazido à humanidade inéditos desafios relacionados às perdas de centenas de milhares de vidas humanas mas, sobretudo, relacionados ao imenso impacto econômico advindo das políticas de quarentena, com fechamento de fronteiras e viagens internacionais para 91% da população mundial, e o fechamento escolas e universidades para 1,27 bilhões de estudantes, ou 72% do total mundial. Dentre as funções da Universidade, a extensão se caracteriza justamente pela alta capilaridade de suas ações e projetos, que pressupõem o contato profundo com a comunidade, para além do público interno dos campi e das faculdades. Este artigo analisa os impactos das políticas de quarentena sobre a ação extensionista de um campus de um Instituto Federal em SC, que se destaca pela alta qualidade de suas ações de extensão.
PERCEPÇÃO DISCENTE FRENTE À ESTRATÉGIA DE TELEMONITORAMENTO EM TEMPOS DE PANDEMIA, 2020
Authors: Gomes Magalhães Adriana , Augusto Medeiros Silva César , Nayara Pereira Ingrid , Fernanda Dantas da Silva Vívian , Santos Eufrásio Laiane
Published: November 2020

A partir do cenário de isolamento social pela pandemia do coronavírus, as universidades começaram a adotar estratégicas diferentes. O estudo objetivou relatar a experiência de discentes de graduação em fisioterapia com uma nova estratégia de atendimento. Trata-se de um trabalho descritivo, tipo relato de experiência, referente ao telemonitoramento em fisioterapia na saúde da mulher, por extensão universitária. Participaram 5 discentes, 2 docentes, atendendo 6 mulheres com disfunções uroginecológicas e funcionais. Ocorreu via chamadas de vídeos em tempo real, por aplicativo de comunicação virtual, durante 1 mês, 1 sessão por semana. A estratégia fortaleceu vínculos entre comunidade, discentes e docentes, enriqueceu os estudantes tanto no âmbito profissional de forma prática, como na produção de conteúdos teóricos, além de beneficiar mulheres com a continuidade do cuidado.

Palavras-chaves: Coronavirus. Universidades. Estudantes.