bluuebunny/crossref_metadata_2025 huggingface dataset:
Cancer Stem Cell Microenvironment Models with Biomaterial Scaffolds In Vitro
Authors: Hassan Ghmkin , Afify Said M. , Kitano Shiro , Seno Akimasa , Ishii Hiroko , Shang Yucheng , Matsusaki Michiya , Seno Masaharu
Published: December 2020

Defined by its potential for self-renewal, differentiation and tumorigenicity, cancer stem cells (CSCs) are considered responsible for drug resistance and relapse. To understand the behavior of CSC, the effects of the microenvironment in each tissue are a matter of great concerns for scientists in cancer biology. However, there are many complicated obstacles in the mimicking the microenvironment of CSCs even with current advanced technology. In this context, novel biomaterials have widely been assessed as in vitro platforms for their ability to mimic cancer microenvironment. These efforts should be successful to identify and characterize various CSCs specific in each type of cancer. Therefore, extracellular matrix scaffolds made of biomaterial will modulate the interactions and facilitate the investigation of CSC associated with biological phenomena simplifying the complexity of the microenvironment. In this review, we summarize latest advances in biomaterial scaffolds, which are exploited to mimic CSC microenvironment, and their chemical and biological requirements with discussion. The discussion includes the possible effects on both cells in tumors and microenvironment to propose what the critical factors are in controlling the CSC microenvironment focusing the future investigation. Our insights on their availability in drug screening will also follow the discussion.
Autonomous Power Decision for the Grant Free Access MUSA Scheme in the mMTC Scenario
Authors: Ben Ameur Wissal , Mary Philippe , Hélard Jean-François , Dumay Marion , Schwoerer Jean
Published: December 2020

Non-orthogonal multiple access schemes with grant free access have been recently highlighted as a prominent solution to meet the stringent requirements of massive machine-type communications (mMTCs). In particular, the multi-user shared access (MUSA) scheme has shown great potential to grant free access to the available resources. For the sake of simplicity, MUSA is generally conducted with the successive interference cancellation (SIC) receiver, which offers a low decoding complexity. However, this family of receivers requires sufficiently diversified received user powers in order to ensure the best performance and avoid the error propagation phenomenon. The power allocation has been considered as a complicated issue especially for a decentralized decision with a minimum signaling overhead. In this paper, we propose a novel algorithm for an autonomous power decision with a minimal overhead based on a tight approximation of the bit error probability (BEP) while considering the error propagation phenomenon. We investigate the efficiency of multi-armed bandit (MAB) approaches for this problem in two different reward scenarios: (i) in Scenario 1, each user reward only informs about whether its own packet was successfully transmitted or not; (ii) in Scenario 2, each user reward may carry information about the other interfering user packets. The performances of the proposed algorithm and the MAB techniques are compared in terms of the successful transmission rate. The simulation results prove that the MAB algorithms show a better performance in the second scenario compared to the first one. However, in both scenarios, the proposed algorithm outperforms the MAB techniques with a lower complexity at user equipment.
Demand Management for Optimized Energy Usage and Consumer Comfort Using Sequential Optimization
Authors: Samadi Mikhak , Fattahi Javad , Schriemer Henry , Erol-Kantarci Melike
Published: December 2020

The Energy-efficiency of demand management technologies and customer’s experience have emerged as important issues as consumers began to heavily adopt these technologies. In this context, where the electrical load imposed on the smart grid by residential users needs to be optimized, it can be better managed when customer’s comfort parameters are used, such as thermal comfort and preferred appliance usage time interval. In this paper a multi-layer architecture is proposed that uses a multi-objective optimization model at the energy consumption level to take consumer comfort and experience into consideration. The paper shows how our proposed Clustered Sequential Management (CSM) approach could improve consumer comfort via appliance use scheduling. To quantify thermal comfort, we use thermodynamic solutions for a Heating Ventilation and Air Conditioner (HVAC) system and then apply our scheduling model to find the best time slot for such thermal loads, linking consumer experience to power consumption. In addition to thermal loads, we also include non-thermal loads in the cost minimization and the enhanced consumer experience. In this hierarchal algorithm, we classified appliances by their load profile including degrees of freedom for consumer appliance prioritization. Finally, we scheduled consumption within a Time of Use (ToU) pricing model. In this model, we used Mixed Integer Linear Programming (MILP) and Linear Programming (LP) optimization for different categories with different constraints for various loads. We eliminate the customer’s inconvenience on thermal load considering ASHRAE standard, increase the satisfaction on EV optimal chagrining constrained by minimum cost and achieve the preferred usage time for the non-interruptible deferrable loads. The results show that our model is typically able to achieve cost minimization almost equal to 13% and Peak-to-Average Ratios (PAR) reduction with almost 45%.
Accuracy Evaluation of Selected Mobile Inspection Robot Localization Techniques in a GNSS-Denied Environment
Authors: Szrek Jarosław , Trybała Paweł , Góralczyk Mateusz , Michalak Anna , Ziętek Bartłomiej , Zimroz Radosław
Published: December 2020

Locating an inspection robot is an essential task for inspection missions and spatial data acquisition. Giving a spatial reference to measurements, especially those concerning environmental parameters, e.g., gas concentrations may make them more valuable by enabling more insightful analyses. Thus, an accurate estimation of sensor position and orientation is a significant topic in mobile measurement systems used in robotics, remote sensing, or autonomous vehicles. Those systems often work in urban or underground conditions, which are lowering or disabling the possibility of using Global Navigation Satellite Systems (GNSS) for this purpose. Alternative solutions vary significantly in sensor configuration requirements, positioning accuracy, and computational complexity. The selection of the optimal solution is difficult. The focus here is put on the assessment, using the criterion of the positioning accuracy of the mobile robot with no use of GNSS signals. Automated geodetic surveying equipment is utilized for acquiring precise ground truth data of the robot’s movement. The results obtained, with the use of several methods, compared: Wheel odometry, inertial measurement-based dead-reckoning, visual odometry, and trilateration of ultra-wideband signals. The suitability, pros, and cons of each method are discussed in the context of their application in autonomous robotic systems, operating in an underground mine environment.
Comparing Direct Observation of Torsion with Array-Derived Rotation in Civil Engineering Structures
Authors: Guéguen Philippe , Guattari Frédéric , Aubert Coralie , Laudat Theo
Published: December 2020

In this article, we analyze the rotation rates in a building derived from a network of translation sensors and recorded by a rotation sensor. The building is Grenoble city hall, a reinforced concrete structure with permanent accelerometric translation sensors at the top and bottom of the building. A temporary experiment was conducted, consisting in installing a BlueSeis-3A rotation sensor for more than 24 h at the top of the structure. The ambient vibrations were analyzed. The amplitudes of translation accelerations and rotation rates at the top and bottom of the building, along with their variations over time, were analyzed. The acceleration/rotation ratios were then compared with the impulse wave velocities derived from seismic interferometry by deconvolution between the top and bottom. Perspectives with regard to building imaging, time monitoring of structural integrity and understanding the contribution of rotations to the structure’s response are discussed, offering new suggestions for research projects.
Effects of Neighboring Units on the Estimation of Particle Penetration Factor in a Modeled Indoor Environment
Authors: Lai Yonghang , Ridley Ian A. , Brimblecombe Peter
Published: December 2020

Ingress of air from neighboring apartments is an important source of fine particulate matter (PM2.5) in residential multi-story buildings. It affects the measurement and estimation of particle deposition rate and penetration factor. A blower-door method to measure the particle deposition rate and penetration factor has previously been found to be more precise than the traditional decay-rebound method as it reduces variability of PM2.5 ingress from outside. CONTAM is a multi-zone indoor air quality and ventilation analysis computer program to aid the prediction of indoor air quality. It was used in this study to model the indoor PM2.5 concentrations in an apartment under varying PM2.5 emission from neighboring apartments and window opening and closing regimes. The variation of indoor PM2.5 concentration was also modeled for different days to account for typical outdoor variations. The calibrated CONTAM model aimed to simulate environments found during measurement of particle penetration factor, thus identifying the source of error in the estimates. Results show that during simulated measurement of particle penetration factors using the blower-door method for three-hour periods under a constant 4 Pa pressure difference, the indoor PM2.5 concentration increases significantly due to PM2.5 generated from adjacent apartments, having the potential to cause an error of more than 20% in the estimated value of particle penetration factor. The error tends to be lower if the measuring time is extended. Simulated measurement of the decay-rebound method showed that more PM2.5 can penetrate inside if the PM2.5 was generated from apartments below under naturally variable weather conditions. A multiple blower-door fan can be used to reduce the effects of neighboring emission and increase the precision of the penetration estimates.
Using Deliberative Democracy for Better Urban Decision-Making through Integrative Thinking
Authors: Hartz-Karp Janette , Marinova Dora
Published: December 2020

This article expands the evidence about integrative thinking by analyzing two case studies that applied the collaborative decision-making method of deliberative democracy which encourages representative, deliberative and influential public participation. The four-year case studies took place in Western Australia, (1) in the capital city Perth and surrounds, and (2) in the city-region of Greater Geraldton. Both aimed at resolving complex and wicked urban sustainability challenges as they arose. The analysis suggests that a new way of thinking, namely integrative thinking, emerged during the deliberations to produce operative outcomes for decision-makers. Building on theory and research demonstrating that deliberative designs lead to improved reasoning about complex issues, the two case studies show that through discourse based on deliberative norms, participants developed different mindsets, remaining open-minded, intuitive and representative of ordinary people’s basic common sense. This spontaneous appearance of integrative thinking enabled sound decision-making about complex and wicked sustainability-related urban issues. In both case studies, the participants exhibited all characteristics of integrative thinking to produce outcomes for decision-makers: salience—grasping the problems’ multiple aspects; causality—identifying multiple sources of impacts; sequencing—keeping the whole in view while focusing on specific aspects; and resolution—discovering novel ways that avoided bad choice trade-offs.
Simulation of Torsional Vibration of Driven Railway Wheelsets Respecting the Drive Control Response on the Vibration Excitation in the Wheel-Rail Contact Point
Authors: Trimpe Fritz , Lück Sönke , Naumann Rolf , Salander Corinna
Published: December 2020

For the stability verification of railway wheelsets in Germany, dynamic torsional stresses must be respected as they affect the axle and press fit stability of a wheelset. These dynamic stresses are applied to a wheelset by torsional vibration. However, dynamic stresses cannot be predicted by calculation, and so time-consuming and cost-intensive test runs are performed to measure the maximum dynamic stresses. Therefore, this article deals with the setup of a simulation model that shall enable the simulative prediction of maximum dynamic torsional stresses. This model respects that vibration excitation originates from the wheel-rail contact point and that the vibration energy input comes from a high-frequency drive train control. The first results show successful simulation of vibration excitation and correlations between adhesion change and maximum dynamic stresses.
Further Empirical Evidence on Patrick Hughes’ Reverspectives: A Pilot Study
Authors: Galmonte Alessandra , Murgia Mauro , Sors Fabrizio , Prpic Valter , Agostini Tiziano
Published: December 2020

Reverspectives are paintings created by the English artist Patrick Hughes. They are 3D structures, for example, pyramids or prisms, which elicit an illusory depth perception that corresponds to the reverse of the physical depth layout. Rogers and Gyani state that “the perspective information provided by a simple grid of vertical and horizontal lines on a slanting surface can be just as powerful as the information provided by a rich, naturalistic scene”. The present experiment was aimed to further investigate this perspective reversal. Three independent variables were manipulated: (1) texture components (i.e., vertical, horizontal, and oblique lines components), (2) texture spatial arrangement (i.e., Hughes-type “perspective” grid vs. equidistant “no perspective” grid), and (3) illumination direction (i.e., homogeneous illumination, light from above, and light from below). The dependent variable was the “critical distance”, namely, the distance between an approaching observer and the stimulus at which the illusory depth perception of concavity/convexity switched to the actual perception of convexity/concavity. The results showed that a stronger illusion is elicited by: (a) a Hughes-type texture spatial arrangement; (b) a complete grid texture composition, having both vertical and horizontal, and oblique components; and (c) illumination from below, as opposed to the condition in which light is coming from above.
Recent Developments in the Application of Water Resource Dispatching Systems in China
Authors: Xiang Xinfeng , Kong Lingzhong , Sun Huaiwei , Lei Xiaohui , Liang Ji , Li Yueqiang
Published: December 2020

This paper addresses recent developments in the application of water Resource dispatching systems (WRDSs) in China. Through a survey of watershed managers and a literature analysis, it was found that water diversion projects should be the top priority of water resource management by considering the recovery construction of water diversion projects. Case studies of WRDSs in the South-to-North Water Diversion (SNWD) and Pearl River Basin are discussed in this article. The results show that total water consumption management (WCM), water quality monitoring and management (WQMM), minimum discharge flow management (MDFM), and water dispatch management (WDM) modules should be considered in WRDSs. Finally, strategies and needs for resolving water resource management problems are discussed, along with other applications of WRDSs in China.
ECONOMICALLY USEFUL QUALITIES OF JERSEY CATTLE IN THE SELECTION OF MILK PROTEIN GENES CSN2 AND CSN3
Authors: КОВАЛЮК Н.В. , САЦУК В.Ф. , ШИРЯЕВА Е.В. , ЯКУШЕВА Л.И.
Published: December 2020

В данной статье  дана частота встречаемости носителей генотипов по локусам CSN2 и CSN3 и оценена степень влияния CSN2 и CSN3 генотипов на молочную продуктивность у животных джерсейской породы. Проведено генотипирование 697 (609 телок и 88 коров) животных джерсейской породы, проанализирована информация о 178 джерсейских быках-производителях. Установлено, что в различных группах животных частота встречаемости «предпочтительных» в хозяйственном отношении локусов CSN2 генотипа А2А2 составляет от 0,50 до 0,80 и CSN3 генотипа ВВ — от 0,66 до 0,88. Высокая частота встречаемости «желательных» CSN2 и CSN3 генотипов позволяет создать джерсейское стадо с генотипами А2А2 и ВВ гораздо быстрее, чем у крупного рогатого скота других пород. Генотипы А2А2 и ВВ (локусы CSN2 и CSN3) не оказывают негативного влияния на молочную продуктивность их носителей.

In this article, the frequency of occurrence of carriers of genotypes at the CSN2 and CSN3 loci is given and the degree of influence of CSN2 and CSN3 genotypes on milk productivity in Jersey animals is estimated. Genotyping of 697 (609 heifers and 88 cows) Jersey animals was performed, and information about 178 Jersey bulls was analyzed. It was found that in different groups of animals, the frequency of occurrence of «preferred» loci in the economic relation CSN2 genotype A2A2 is from 0.50 to 0.80 and CSN3 genotype BB — from 0.66 to 0.88. The high frequency of occurrence of «desirable» CSN2 and CSN3 genotypes makes it possible to create a Jersey herd with genotypes A2A2 and BB much faster than in cattle of other breeds. The A2A2 and B genotypes (CSN2 and CSN3 loci) do not negatively affect the milk productivity of their carriers.
REALIZATION OF MILK PRODUCTIVITY OF SIMMENTALS IN THE CONDITIONS OF YAKUTI
Authors: ЧЕРКАШИНА А.Г. , КАЛИНИНСКИЙ Р.Г.
Published: December 2020

По состоянию на 27 февраля 2020 года во всех категориях хозяйств Республики Саха (Якутия) численность поголовья крупного рогатого скота составила 190039 голов, из них  76075 коров. На примере скотоводства Центральной агропромышленной зоны республики рассмотрены состояние, проблемы и возможности повышения молочной продуктивности коров самой многочисленной из разводимых пород республики — симментальской (более 75% в структуре поголовья). Установлено уменьшение ее поголовья, в том числе коров.  Снижение численности скота и низкий среднегодовой удой отрицательно отразились на валовом производстве молока в республике. Анализ рационов кормления коров в стойловый и пастбищный периоды 2016—2017 годов показал несоответствие рационов рекомендуемым нормам кормления, прежде всего, отмечен дефицит протеина и энергии. Несбалансированность рационов способствовала снижению продуктивности скота в 2017 году: удой на 1 фуражную корову уменьшился на 153,8 кг и выход телят — на 14%. Кормление симментальских коров согласно рекомендуемым нормам по обменной энергии и питательным веществам обеспечит реализацию потенциала молочной продуктивности и повысит выход телят.

As of February 27, 2020, in all categories of farms in the Republic of Sakha (Yakutia), the number of cattle was 190,039 heads, of which 76,075 were cows. In the example of cattle breeding in the Central agro-industrial zone of the republic, the state, problems and possibilities of increasing the milk productivity of cows of the most numerous of the breeding breeds of the republic — Simmental (more than 75% in the structure of livestock) are considered. A decrease in her livestock, including cows, has been established. The decline in the number of livestock and the low average annual milk yield had a negative impact on the gross milk production in the republic. Analysis of the rations for feeding cows in the stall and pasture periods of 2016–2017 showed that the rations did not correspond to the recommended feeding norms, primarily, there was a deficiency of protein and energy. The imbalance in diets contributed to a decrease in livestock productivity in 2017: milk yield per forage cow decreased by 153.8 kg and calf yield — by 14%. Feeding Simmental cows according to the recommended metabolic energy and nutrient levels will ensure the potential of milk production is realized and the calf yield will be increased.
ASSESSMENT BY ORIGIN OF BULLS OF DIFFERENT GENOTYPES ASSOCIATED WITH DISEASE RESISTANCE AND PRODUCT QUALITY
Authors: ГИЛЬМАНОВ Х.Х. , ТЮЛЬКИН С.В. , ВАФИН Р.Р. , ПРЯНИЧНИКОВА Н.С.
Published: December 2020

Успешное развитие скотоводства с целью получения биологически безопасной молочной продукции высокого качества возможно лишь в условиях эпизоотического благополучия. Повышенная молочная продуктивность коров сопряжена со снижением резистентности к различным заболеваниям, включая лейкоз и мастит. Изучена оценка племенной ценности чистопородных и помесных с голштинской породой быков-производителей, принадлежащих племпредприятию Республики Татарстан, с комплексными генотипами iNOS и LTF по характеру проявления молочной продуктивности у ближайших женских предков. Установлено, что наибольшие показатели по удою и выходу молочного жира женских предков оказались у быков с комплексным генотипом BB/AA генов iNOS/LTF. Согласно результатам исследований рекомендуем в хозяйствах Республики Татарстан с часто встречаемыми случаями заболевания животных лейкозом и маститом целенаправленно использовать в селекционно-племенной работе быков-производителей, несущих в своем генотипе A и B аллели соответствующих генов iNOS и LTF.

The successful development of cattle breeding in order to obtain biologically safe high-quality dairy products is possible only in conditions of epizootic well-being. The increased milk performance of cows is associated with the reduction of the resistance to various diseases, including leukemia and mastitis. In this research work we studied purebred breeding bulls and bulls crossbred with Holstein breed (both type of bulls have a complex iNOS and LTF genotypes) belonging to the plempredprime of the Republic of Tatarstan. We made an assessment of their breeding value based on the nature of milk production in the closest female ancestors. It was found that the highest indicators of milk yield and milk fat yield of female ancestors were found in bulls with a complex genotype BB / AA of the iNOS / LTF genes. According to the research results, in breeding work in farms of the Republic of Tatarstan with frequent cases of animal disease with leukemia and mastitis, we recommend purposefully using breeding bulls that carry in their genotype A and B alleles of the corresponding iNOS and LTF genes.
Grammatical and Syntactical Functions of Auxiliaries in English and Urdu
Authors: Aziz Asif , Saleem Tahir , Maqsood Binish , Ameen Zanib
Published: December 2020

The current study investigates grammatical and syntactical functions of auxiliaries in Urdu and English to draw certain distinctions regarding the behavior, syntactic representation and semantic content auxiliaries add to the main verbs (Vs) through the X-bar theory as a theoretical framework within the minimalist program (MP). The data of the current research were collected from authentic sources (Urdu and English text books and grammars) to consider a diverse range of possible usage of Urdu and English auxiliaries. 200 sentences extracted from textbooks and grammars were analyzed grammatically in terms of morphology, and syntax (through tree-representation and their movement). The findings indicate sharp differences related to the syntactic position of auxiliaries in Urdu and English. In Urdu, auxiliaries always occupy their position after the main verbs in a sentence and their position is fixed and also have the ability to mark number (singular & plural) and gender (masculine & feminine). In contrast, English auxiliaries can only mark number. Another sharp difference is observed in the question formation process. In Urdu, unlike English, auxiliaries cannot be moved from its latent position towards the specifier position at the beginning of the sentence to construct question structures, because, if it happens, the sentence is considered ungrammatical which may result in the violation of MP. The findings of the study would prove helpful for understanding the semantic, grammatical and syntactical nature and behavior of auxiliaries comparatively in Urdu and English.
Docta religio y pia philosophia en el pensamiento de Marsilio Ficino: las fuentes herméticas y la búsqueda de una concordia
Authors: Paul Andrea
Published: December 2020

El objetivo del trabajo es doble: por un lado, está dirigido a examinar la reelaboración de la Prisca Theologia por parte de Marsilio Ficino, neoplatónico florentino del siglo XV. Esto es, un saber cuyos orígenes se remontan hasta el Egipto de los faraones y la Persia de Zoroastro. Una tradición milenaria que en su seno contenía las doctrinas de una verdadera pia philosophia. Por otro, pensar la recepción del hermetismo en el pensamiento ficiniano en su intento de generar una concordia entre el cristianismo y el paganismo. Consideramos que en este intento Ficino elabora, en el transcurso de sus obras, tres imágenes de Hermes Trismegisto condensadas en su objetivo principal, demostrar la armonía entre las doctrinas de los antiguos teólogos paganos y la teología cristiana.
Justificación de los derechos humanos: una mirada desde la metaética y la posibilidad de un enfoque no cognitivista
Authors: Flores María Fernanda
Published: December 2020

El presente artículo tiene como objetivo llevar a cabo una revisión del concepto de agencia en dos propuestas actuales de fundamentación de los derechos humanos, con el fin de mostrar las falencias de la concepción naturalista y sentar las bases para una fundamentación alternativa, desde un enfoque no cognitivista. Para ello consideramos que es preciso determinar en qué medida el concepto de agente retoma la idea naturalista de la atribución de derechos en virtud de los rasgos propiamente humanos. Nuestra hipótesis es que esta interpretación opaca algunos elementos de las teorías contemporáneas que pueden ser dilucidados a la luz de la epistemología moral y la metaética.
Vidas en lucha. Conversaciones, de Judith Butler, Virginia Cano y Laura Fernández Navarro
Authors: Arhancet Alejandrina
Published: December 2020

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Territorio(s) e indigeneidad(es): aportes a partir del trabajo de campo con comunidades comechingonas cordobesas
Authors: Palladino Lucas
Published: December 2020

Este artículo pretende aportar al estudio de los procesos de territorialización y comunalización indígena, ofreciendo como material un estudio etnográfico en la provincia de Córdoba, Argentina. En primer lugar, se realiza una descripción de los procesos de re-emergencia indígena y comunalización en contextos de extinción en la provincia de Córdoba. En segundo lugar, se plantea un recorrido analítico sobre las categorías de comunalización, indigeneidad y territorio o procesos de territorialización. En tercer lugar, se muestran dos casos donde, a su vez, operan dos procesos: territorialización y rearticulación de comunidades comechingonas. Aquí se aborda, por un lado, el proceso de comunalización de La Toma en la ciudad de Córdoba capital desde el año 2008, atendiendo al papel que jugó el pasado territorial en la construcción de los sentidos de pertenencia movilizados; por el otro, se analizan los sentidos sobre el pasado y las prácticas de comunalización de la Comunidad Ticas, investigada a partir del 2013, cuando ocupa un terreno ubicado en un espacio rural para realizar sus actividades comunitarias.
Interpretações cuyanas sobre a geografia no Brasil
Authors: Da Albuquerque Bomfim Paulo Roberto
Published: December 2020

O objetivo principal deste artigo é investigar, a partir da leitura do Boletín de Estudios Geográficos publicado pela Universidad Nacional de Cuyo (Mendoza), como o Brasil e a geografia produzida no Brasil despertaram interesse entre geógrafos argentinos nas décadas de 1950 e 1960. A Universidad de Cuyo foi o epicentro das relações acadêmicas exteriores na Argentina, lugar que será ocupado pela Universidad de Buenos Aires nos anos de 1970. Identificamos nos números do Boletín comentários, notas e artigos que evidenciam a circulação de geógrafos brasileiros e argentinos entre Mendoza e instituições/locais brasileiros, como Rio de Janeiro, Instituto Brasileiro de Geografia e Estatística e Associação dos Geógrafos Brasileiros. Os geógrafos argentinos desejavam um aggiornamento de suas linhas de pesquisa, numa perspectiva de inserção no planejamento como instrumento de superação do subdesenvolvimento das economias latino-americanas. Os textos do Boletín demostram também forte influência da geografia francesa. Esse contato com as produções brasileiras e francesas assinala caminhos teóricos da geografia na Argentina permeados por rubricas como geografia aplicada, geografia tropical etc., que marcam logros e impasses nas reflexões geográficas locais, corroborando um rico intercâmbio geográfico transnacional, muitas vezes pleno de contradições teóricas e político-ideológicas.
Las múltiples implicancias espaciales de la difusión del COVID-19. Un estado de la cuestión
Authors: Zusman Perla , Lus Bietti Gonzalo , Landini Gabriela
Published: December 2020

Este artículo tiene por objetivo identificar las preocupaciones conceptuales y temáticas que se observan en los textos publicados sobre el COVID-19 en el campo de la Geografía, al poco tiempo de expansión de la dolencia a nivel mundial. A la vez que se persigue desnaturalizar y politizar la pandemia, se observa un interés por demostrar que el espacio es una dimensión significativa en la interpretación de su difusión y en el modelaje de las implicancias sociales. Las cuestiones recurrentemente discutidas en los textos son la relación de la pandemia con el régimen de acumulación neoliberal y la globalización, el Estado y el control de la movilidad sobre los cuerpos, las vulnerabilidades económicas, sanitarias y educativas, los cuidados y el hogar, y los desafíos que la pandemia plantea para el futuro tanto para el planeta como para la geografía en cuanto disciplina.
SELECTIVE PRODUCTION OF MONOALKYLAMINES IN THE PRESENCE OF THE SUPPORTED NANOCATALYST IN THE PLUG-FLOW REACTOR
Authors: Popov Yu. V. , Mokhov V. M. , Panov A. O. , Latyshova S. E. , Razvalyaeva A. V. , Lagutin M. A.
Published: December 2020

The reducing alkylation of nitrobenzene with alcohols in the presence of a copper-nickel catalyst prepared the deposition-precipitation method in a plug-flow reactor in a gas-liquid-solid catalyst system was studied. It has been found that the use of this catalyst makes it possible to obtain monoalkylanilines with high selectivity at full conversion of nitrobenzene.
PREPARATION AND LYOPHILIC PROPERTIES OF CHITOSAN AEROGELS MODIFIED WITH GLYCYDYL METHACRYLATE COPOLYMERS
Authors: Yartseva V. M. , Bryuzgina E. B. , Klimov V. V. , Bryuzgin E. V. , Navrotskii A. V.
Published: December 2020

The article presents the results of a study of the properties of chitosan spongy materials (aerogels) surface modified with copolymers of glycidyl methacrylate. The surface of the obtained materials is characterized by a highly hydrophobic state with contact angles at the initial time moment more than 140 degrees, while a decrease in water absorption of aerogels and a slight decrease in oil absorption are also observed as a result of the modification.
WATER-SWELLING ELASTOMERS BASED ON ETHYLENE-PROPYLENE RUBBER
Authors: Lopatina S. S. , Vaniev M. A. , Sychev N. V. , Demidov D. V. , Cheremisin A. A. , Bakhturov A. A.
Published: December 2020

This paper is dedicated to the investigation of water- and oilswelling ability of the elastomeric material based on nonpolar ethylene-propylene rubber, modified by water swelling agents such as combination of copolymer acrylamide with potassium acrylate and sodium-carboxymethyl cellulose. It was found that the maximum volume increase of the sample recorded during it`s exposure in water and is equal 1250 %, in 10 % and 22 % aqueous solutions of sodium chloride is up to 280 % and 210 %, in oil and the Polyekonol-Flora drilling system 70 % and 80 %, respectively.
Cooperación Internacional al Desarrollo española en el marco de la Agenda 2030 para el Desarrollo Sostenible
Authors: Verdiales López Diana M.
Published: December 2020

La promulgación de la nueva Agenda para el Desarrollo Sostenible suscrita en el 2015 por la mayoría de los países en el mundo marcó el inicio de una segunda etapa para continuar trabajando en la construcción del desarrollo humano sostenible, enfocado principalmente en tres dimensiones claves: social, económico y medioambiental. Tras finalizar la implementación de los Objetivos de Desarrollo del Milenio (2000-2015) se vio la irremediable necesidad de continuar trabajando en la construcción de un mundo mejor, más equitativo, solidario y sostenible. Por ello, se desarrollaron 17 Objetivos de Desarrollo Sostenible (ODS) para que “nadie se quedara atrás”. En este sentido, la Cooperación Internacional al Desarrollo española, si bien se vio afectada por la crisis económica de 2008, continúa trabajando para apoyar a aquellos países que más lo necesitan bajo proyectos de cooperación enfocados en las cuestiones relativas al medio ambiente, la diversidad cultural, el combate y erradicación de la pobreza y en las cuestiones relativas a la igualdad social y de género. Con la puesta en marcha de la Agenda 2030, España retoma su compromiso en materia de cooperación al desarrollo, sin embargo, las acciones desarrolladas hasta el momento, junto con las cuestiones económicas y sanitarias internacionales actuales, no le permiten ajustarse plenamente a los requerimientos contenidos en cada uno de los Objetivos de Desarrollo Sostenible.
Características de los pacientes con estancia prolongada en el servicio de cirugía general del Hospital Nacional Almanzor Aguinaga Asenjo
Authors: Díaz-Koo Cristian Jesús , Fernández-Mogollón Jorge , Hirakata-Nakayama César
Published: December 2020

Introducción: La estancia hospitalaria prolongada constituye una preocupación a nivel mundial por sus efectos negativos en el sistema de salud, aumentando los costos, generando deficiencia en la accesibilidad de prestación de servicios de salud, saturación de unidades de hospitalización y urgencias y por consiguiente mayores efectos adversos como lo son las enfermedades intrahospitalarias. Objetivo: Determinar las características de los pacientes con estancia hospitalaria prolongada en el servicio de Cirugía General del HNAAA. Resultados: Se encontró una media de 15 días de hospitalización entre los pacientes con estancia prolongada. Las características más encontradas en estos pacientes fueron la demora en la realización del procedimiento quirúrgico, la no relación con un trabajador dentro del sistema de salud (74%), edad mayor a 65 (58%) , ser del sexo femenino (54%) y tener alguna neoplasia del tracto gastrointestinal (cáncer de colon: 16%, ampuloma 10%, cáncer de estómago: 8%). Conclusión: Las características encontradas en los pacientes con estancia hospitalaria prolongada más comunes fueron la demora en la realización del procedimiento quirúrgico, la demora en la respuesta a interconsultas, la no relación a un trabajador asistencial, administrativo o de limpieza en el sistema de salud, edad mayor a 65, ser del sexo femenino y tener alguna neoplasia del tracto gastrointestinal.
High pot but no T
Authors: Manrique-Gonzalez Luis Miguel , Truttmann Berta , Münzer MD Thomas
Published: December 2020

Introduction. The identification and treatment of patients with hyperkalemia is necessary to prevent the development of arrhythmias. Pseudohyperkalemia is most commonly due to specimen haemolysis and is often recognised by laboratory scientists who subsequently report test results with cautionary warnings. The authors present a case of pseudohyperkalemia in a patient with chronic lymphocytic leukaemia. Report case: the technical factors and method of transport are a potential cause of pseudohyperkalemia. Pseudohyperkalemia has been associated with hyperleukoctosis, in cancer patient populations, more commonly in CLL in adults, but also acute lymphoblastics leukemia in children. This places the patient at risk of unnecessary and potentially dangerous treatments. Conclusion: Physicians should consider pseudohyperkalemia as the underlying cause of elevated potassium levels in patients with malignant leucocytosis who do not have signs or symptom of systemic hyperkalemia.
Lumbociatalgia como presentación de un liposarcoma del psoas iliaco: Reporte de caso
Authors: Pintado-Guevara Carlos A. , Vásquez-Tirado Gustavo , Vitery-Zumaran Fiorella , Requena Fuentes Víctor
Published: December 2020

Introducción. Los sarcomas retroperitoneales son tumores raros, con una presentación clínica dada por síntomas compresivos poco específicos. Reporte de Caso: Reportamos un caso de un varón de 69 años con historia de lumbociatalgia e incremento en el volumen del miembro inferior izquierdo hasta llegar a la incapacidad para deambular, se le realizó una Tomografía Abdominal Con Contraste donde se halló una gran tumoración dependiente del músculo psoas iliaco izquierdo que se extendía hasta la pelvis, la cual fue sometida a biopsia encontrándose un Liposarcoma de psoas de alta celularidad. Conclusiones: Los sarcomas son tumores raros originados del tejido mesequenquimal, la gran mayoría de estos tienen síntomas y signos inespecíficos siendo diagnosticados de forma tardía y a pesar del manejo quirúrgico el pronóstico es pobre.
ANALISIS READINESS FOR CHANGE TERHADAP KINERJA: PERSPEKTIF KARYAWAN KONTRAK DI MASA PANDEMI COVID-19
Authors: Asbari Masduki , Novitasari Dewiana , Silitonga Nelson , Sutardi Didi , Gazali
Published: December 2020

This study aimed to measure the effect of transformational leadership on employee performance of the employee of a HVAC industry in Tangerang which are mediated by readiness for change. Data collection was done by simple random sampling technique and the returned and valid questionnaire results were 224 samples. Data processing was used SEM method with SmartPLS 3.0 software. The results of this study concluded that transformational leadership have not significant effect on the employee performance, but transformational leadership have a positive and significant effect on readiness for change. This study conclude also that readiness for change have a positive and significant effect on relationship between transformational leadership and employee performance. Readiness for change as fully mediator. This new research proposed a model for building employee performance among the employee of a HVAC industry in Tangerang through enhancing transformational leadership practice with readiness for change as a mediator. This research could pave the way to improve employee readiness in facing the era of industrial revolution 4.0.
Effect of ultrasound on nonsteroidal anti-inflammatory drugs complexed with copper, iron, zinc and graphene oxides
Authors: Mikhnavets L. A. , Tkach A. N. , Fiadosenka U. S. , Radziuk D. V.
Published: December 2020

This work aims at the formation of nanocomposites based on graphene and metal oxides (copper-iron, zinc and iron) through ultrasonic interaction (20 kHz) and investigation of their electromagnetic properties by scanning electron microscopy, Raman and absorption spectroscopy, and fluorescence methods. The output of this work implies the development of a single-step ultrasound method to form functional Cu/Fe-, ZnO-and Fe3O4-polyvinyl alcohol nanocomposites, and the ultrasonic conjugation of these nanocomposites with pristine drugs, such as ketorolac and acetylsalicylic acid. We established that formed Cu/Fe-graphene-ketorolac, ZnO-grapheneacetylsalicylic acid and Fe3O4-ketorolac obtain optical and superparamagnetic properties of nanoparticles with improved electromagnetic characteristics due to ultrasonic conjugation. Cu/Fe-graphene-ketorolac nanocomposites are revealed to have a spherical shape (< 100 nm) and acquire improved optoelectronic properties due to copper and iron atoms in the matrix of graphene. It is demonstrated that ZnO-graphene-acetylsalicylic acid nanocomposites obtain properties of fluorescence mainly for electromagnetic interaction with the ZnO phase formed on the surface of graphene. Ultrasonic conjugation of ketorolac with magnetite proved to increase the electron density of Fe3O4-ketorolac that obtains superparamagnetic properties, and its biocompatibility can be improved when coated with polyvinyl alcohol. In general, formed nanocomposites are of great interest in medical electronics and nanomedicine as functional materials with electromagnetic properties being controlled at the molecular and atomic levels. Such nanocomposites can also find application as components in electronic devices for diagnosis and treatment of serious inflammatory disorders. Industries will find the singlestep ultrasound method of special interest because it is eco-friendly and can be scaled up by a versatile spectrum of inorganic and organic materials and drugs.
Change in surface properties of tooth under cold atmospheric plasma impact
Authors: Aksyuchits A. V. , Kotov D. A. , Osipov A. N. , Nedel V. Ch.
Published: December 2020

The article presents the results of experimental studies of the wetting angle of the tooth surface after treatment in the plasma of a dielectric barrier discharge at atmospheric pressure. Measurements of the dependence of the length of the plasma torch and the temperature of the treatment object on the flow rate of the working gas have been carried out. Argon was used as a working gas. The research revealed the possibility to change the length of the plasma torch in the range from 9 mm to more than 25 mm and showed that the temperature of the treated tooth surface with an increase in flow rate from 40 degrees Celsius falls to 32 degrees Celsius. The distilled water wetting angle was determined by the lying drop method. Depending on the processing time, a decrease in the contact angle of the tooth surface wetting from the initial 77 to 20 degrees was observed. The modes of operation of the plasma generator in tooth surface treatment, which provide the best indicators of its wettability, have been determined.
The Effectiveness of Acupressure and Smart Gymnastic on Fasting Blood Sugar Levels among Patients with Type II Diabetes Mellitus
Authors: Nelyanti Dian Apri , Ta’adi Ta’adi , Anwar M. Choiroel
Published: December 2020

Diabetes mellitus (DM) is a glucose metabolism disease characterized by an increase in blood sugar levels and impaired metabolism of fats, protein, and carbohydrates due to a lack of the hormone insulin, both absolutely and relatively. Alternative treatment of diabetes mellitus with complementary therapies, namely acupressure and smart gymnastic, can improve the fasting blood sugar level. This study aims to determine the effectiveness of acupressure and smart gymnastic on fasting blood sugar levels among patients with type II diabetes mellitus. True experimental study pretest and post-test with non-equivalent control group design were applied in this study. Repeated Measure, ANOVA test, showed a significant difference with the mean fasting blood sugar level p-value 0.000 (<0.05). The intervention group is better at lowering fasting blood sugar levels than control group 1 and control group 2 seen from the higher value difference. Conclusion of acupressure therapy with smart gymnastics three times a week for four weeks effectively reduces fasting blood sugar level in a patient with type II diabetes mellitus. This study can be used as a reference for further research, with a larger sample size, controlling the patient's diet, and a longer duration of intervention, so that the results obtained are more valid.
Correlation between the structure and luminescence of InAs submonolayer stacked nanostructures
Authors: Roca Ronel Christian , Kamiya Itaru
Published: December 2020

The correlation between the structure, measured by atomic force microscopy (AFM), and luminescence, measured by photoluminescence (PL), of InAs submonolayer stacked (SMLS) nanostructures near the 2D to 3D transition is investigated. Topographic measurements using AFM reveal a significant change in the structure of uncapped InAs SMLS samples occurs under certain conditions. This structural change is attributed to the transition from 2D to 3D growth. Optical measurements by PL of corresponding capped SMLS samples showed a significant change in the luminescence properties, in the form of significant redshift and linewidth broadening, also occurs at the same conditions where the structural change occurred. Therefore, the data in the present work establishes a strong correlation between the structural and luminescence properties of InAs SMLS nanostructures. Furthermore, the results demonstrate that two forms of InAs SMLS, stacked 2D islands and 3D structures, possess distinct properties in terms of both structure and luminescence.
30 Years of Trade and Investment Cooperation between Russia and South Korea
Authors: Korgun I. A.
Published: December 2020

The presented study analyses the results of trade and investment cooperation between the Russian Federation and South Korea over the past 30 years — since the establishment of diplomatic relations in 1990.

Aim. The study aims to analyze major trends in commodity and investment flows between the two countries to identify the main features of bilateral cooperation over 30 years.

Tasks. The author identifies the main stages of bilateral cooperation; assesses the initial conditions at the time of its origin and how these conditions changed over time; identifies the features of merchandise trade between the two countries; analyzes regional investment structure; describes possible ways to enhance cooperation.

Methods. This study uses systematic methods of statistical analysis of trade and investment, synthesis of information from various uses, including general scientific methods of induction and deduction.

Results. The author determines general trends in the development of trade between the countries — in particular, the increasing concentration of trade flows in several commodity categories, both from Russia and from Korea. Disproportions associated with the amount and orientation of investment and the nature of the business involved in cooperation are identified. Emphasis is placed on the asymmetry in the degree of government involvement in bilateral economic relations.

Conclusions. To enhance cooperation, it is important to create mechanisms and institutions that could serve bilateral trade and investment flows without reference to third countries.