bluuebunny/crossref_metadata_2025 huggingface dataset:
Zoonosis y mascotas en entornos domésticos: comunicación de riesgos
Authors: Sánchez López Antonio , Prats-van der Ham Miranda , Campano Carrasco Sara , De la Fe Christian , Corrales Juan Carlos , Contreras Antonio
Published: June 2021

En las sociedades occidentales, la tenencia de mascotas en el hogar se incrementa anualmente debido a los beneficios emocionales, físicos y psíquicos que aportan. Junto a estos beneficios, debe considerarse también la existencia de diferentes enfermedades que pueden transmitirse desde los animales al resto de convivientes en el hogar, con especial importancia para aquellas personas pertenecientes a grupos de riesgo. El aparente desafío riesgo-beneficio que provoca la tenencia de mascotas deberá solventarse considerando el estado de salud de los miembros del hogar para la selección de la especie y la recomendación de medidas higiénicas y de manejo específicas. De forma general, el conocimiento y la preocupación de los propietarios por las zoonosis asociadas a sus mascotas son escasos, incluso en los hogares donde hay personas de alto riesgo. Además, las limitaciones en los procedimientos de comunicación con los diferentes profesionales sanitarios pueden ocasionar que las situaciones de riesgo pasen desapercibidas. Por todo ello, se impone la necesidad de establecer protocolos, tanto intra como interprofesionales, para proporcionar un adecuado flujo de información que asegure la comunicación con el propietario de acuerdo con las particularidades sanitarias de los convivientes de cada hogar.
Financial Constraints across Pakistani Listed Firms
Authors: Qasim Saira
Published: June 2021

Using Q investment model to scrutinize investment-cash flow sensitivity, a measure of financial constraint, has been a subject of controversy in literature. By using an alternative model called Error Correction model, this study aims to check the sensitivity between firm’s internal finance and investment level for the case of lower middle income country. Literature has shown that firms’ specific characteristics affect the relation between investment and cash flow of the firms. By considering the unique characteristics of Pakistani corporate sector, this study further target to check whether the investment-cash flow sensitivity differs across size of the firms, group affiliation of the firms and dividend policy of the firms. Our findings indicate that Pakistani listed firms are financially constrained. We find a strong relationship between investment and cash flow for small and non-dividend-paying firms; whereas group-affiliation does not affect investment- cash flow sensitivity of firms.
Assessing the impact of change management on employee performance
Authors: Archibong Udeme , Ibrahim Umar Abbas
Published: June 2021

This article assessed the impact of change management on employee performance with evidence from Nile University of Nigeria. This study made use of a descriptive survey research design. Burke Litwin model of organizational change was adopted for this study because the model explains the linkages between variables and individual and organizational performance. The population consists of 1,400 staff (Academic and Non-Academic) staff of Nile University of Nigeria Abuja. Stratified random sampling techniques were employed to select the sample size of 311 from the population. Regression analysis was used to analyze the data that was collected using a five-point likert scale structured questionnaire. The results showed that Change in organizational structure has a significance on the quality of employee service delivery in Nile University of Nigeria, there is a relationship between technological change and quality of employee service delivery in Nile University of Nigeria even though the relationship was not very strong. Leadership change significantly influences the quality of employee service delivery at Nile University of Nigeria. Human resource is an important internal strength of every organization and a source of competitive advantage, the study, therefore, recommended amongst others that organizations should communicate details of the change to the employees to minimize resistance.
PONUDA TRGOVAČKE ROBE U TURISTIČKOJ PONUDI OPATIJE
Authors: Cerović Zdenko
Published: June 2021

Turistička potrošnja u gradu Opatiji obilježena je karakteristikama turističke potrošnje koje su prepoznatljive i za druge hrvatske destinacije. Opće poznata činjenica ukazuje da se najveći dio u strukturi turističke potrošnje odnosi na usluge smještaja, usluge prehrane i pića, a da na ostale usluge turisti troše znatno manje, te je to osnov izlaganja i interes prikaza o strukturi turističke potrošnje koja se odnosi na sustav turističke ponude trgovačke robe kao osnovnog motiva dolaska ili sadržaja turističke potrošnje turista na Opatijskoj rivijeri. Cilj prikaza je pokušaj objašnjenja koliko se može povećati turistička potrošnja, te koliko ponuda trgovačke robe može biti jedan od motiva dolaska i posjeta turističkih sadržaja i objekata koji djeluju na prostoru grada Opatije.
FRANCUSKI JEZIK U TURISTIČKOJ PONUDI OPATIJE
Authors: Škunca Jadranka
Published: June 2021

Prateći kretanja u turizmu, primijetili smo da je u Hrvatskoj, u zadnje dvije godine, broj francuskih turista osjetno porastao, pa smo odlučili ispitati kakvo je stanje turističke ponude na francuskom jeziku u Opatiji. Primijetili smo da su Francuzi zadnjih godina izdali tri kvalitetna vodiča o Hrvatskoj što govori da smo destinacija koju otkrivaju, a oni koji nas već poznaju vraćaju nam se. Istražili smo kakva je gastro-enološka ponuda u Opatijskim hotelima i restoranima na francuskom jeziku i da li su opatijski turistički radnici upoznati s izdanjima na francuskom jeziku, a ako jesu da li su pripremili svoju ponudu i na francuskom jeziku.
CILJEVI TURISTIČKOG RAZVOJA OPATIJSKE RIVIJERE I STRATEGIJE MARKETINGA
Authors: Alkier Romina
Published: June 2021

Danas, kada je došlo do promjena u gospodarskom i razvojnom smislu, nužno je promišljati novi, uspješniji i sigurniji put turizma, kao i stvaranje novog, karakterističnog proizvoda koji će biti izraz Opatijske rivijere. Novi turistički proizvod mora odražavati prepoznatljivost ove destinacije, ali istodobno mora svojim sadržajem i kvalitetom pobuditi zanimanje i pridonijeti tržišnoj afirmaciji Opatijske rivijere. Postojeće resurse potrebno je maksimalno valorizirati, a zatim u interakciji s drugim relevantnim činiteljima stvoriti konkretnu viziju i strategiju - nužna je obnova postojećih kapaciteta, potpunija valorizacija i zaštita turističkih potencijala, izgradnja novog identiteta i tržišnog repozicioniranja na turističkom tržištu. Opatija se sa svojom rivijerom mora opredijeliti za suvremenu, selektivnu i konkurentnu turističku ponudu, odnosno za poboljšanje svih aspekata ponude, ali pritom mora poštivati i interese domicilnog stanovništva.
UNAPREĐIVANJE PONUDE HRANE ZA VEGETARIJANCE
Authors: Šimundić Borislav
Published: June 2021

Vegetarijanska prehrana karakterizirana sa obiljem žitarica, mahunarki, lisnatog povrća i voća koja osigurava izvor kompleksnh ugljikohidrata i prehrambenih vlakana, vitamina i vrlo ograničenu količinu masnoća opisuje upravo tip prehrane odraslih osoba koji je preporučen za prevenciju kroničnih nezaraznih bolesti današnjice koje se dovode u vezu sa prehranom (Position of the American Dietetic Association, 1993). U svijetu a i kod nas zamjetan je trend prihvaćanja nekog oblika prehrane restriktivnog na mesu, što posljedično otvara nove mogućnosti i potrebe oblikovanja kvalitetne ponude koja bi zadovoljila i najzahtjevnijeg gosta.
THE APPLICATION OF LINEAR PROGRAMMING IN NUTRITION AT THE CHILDREN’S HOME IN SLAVONSKI BROD
Authors: Brajdić Igor , Bogović Josip
Published: June 2021

The nutrition model belongs to a broader set o f problems known as mixture problems. In the literature, it is used as one of the typical examples of linear programming solved by the simplex method. It is of interest to investigate the possibilities of applying this model to an actual situation, such as the problem of nutrition at the Children’s Home in Slavonski Brod. Despite certain limitations to the simplex method, as well as limitations in problem formulation, in which the issue of tastes is neglected, by solving the assigned mathematical model for nutrition using the simplex method an optimum solution has been reached which meets all the conditions set forth in the formulation of the problem. The application of the model using the simplex method indicates a possible annual saving of 74,866 kunas per single meal. Results obtained could serve as guidelines in analysing the costs of the Children’s Home and in improving costs management by helping to determine the optimum financial schedule for nutrition. Benefits would include reducing the costs of nutrition and minimizing the wastage of food.
INFORMATION TECHNOLOGY IN HOTEL BOOKING
Authors: Galičić Vlado , Ivanović Slobodan , Mijolović Davor
Published: June 2021

Booking is one of the most important business functions of the hotel. Timely information regarding the booking situation comprises the basis for making key decisions for the future of hotel operations. Booking is also a very dynamic activity aimed at securing the best service quality possible and expanding the range of the hotel offer. One of the fundamental goals of introducing information technology in hotel booking is to increase the occupancy rate of accommodation facilities. The task of the information subsystem of booking is to provide as much relevant information as possible to the hotel management. This information will allow the management to make well-informed business decisions that will help to boost customer satisfaction, provide higher service quality and yield a greater profit in hotel operations.
Creating a New Experience for Tourists through City Branding (Case Study: City of Shiraz in Iran)
Authors: Barani Mahshid
Published: June 2021

The utility of the destination brand experience directly originates from the type of feelings of audiences present in a city. In this study, after recognising the components affecting the sense of place, their relationship with the tourism brand experience in the city of Shiraz, Iran was assessed, and the way the components made effects were investigated as well. To achieve this end, as stated above, this research was conducted using a case study of Shiraz city. The data collection was performed through observation and questionnaire, and the data analysis technique was a combination of quantitative (using SPSS software) and qualitative methods. The obtained results demonstrated that all factors in each form, activity and meaning components affected the sense of place in Shiraz; however, factors associated with the city’s history, such as historical attractions and famous people, had a remarkable effect when compared to others. Overall, consideration of the indicators influencing the sense of place in all aspects, particularly the management and operational ones (design and execution), results in a more robust connection of the audience with the destination brand, growth of sustainable tourism in Shiraz, and successful competition in the international arena.
Submitted: 12 December 2020; Revised: 29 March December 2021; Accepted: 31 May 2021
Russian Animalier Art in the XVIII- XIX Centuries in the Context of European Schools: The Origins and Nature of Development
Authors: Портнова Ирина
Published: June 2021

This study delves into the process of development of Russian animal art of the 18th-19th Centuries. The primary purpose of the research was to make a review of these two historical periods, which determined the typical features of the early and mature periods of development of animal art in Russia—the time of the birth and development of the genre. According to the author, genre issues are important, and talking about it is necessary to define the image of the animalistic nature in all its specificity. In addition, it is noted that researchers do not characterise the stage of early Animalism, which first appeared in the 18th Century, sufficiently. Nevertheless, this genre has demonstrated all the love of artists for the real perception of the natural world and their sincere will to create its truthful and reliable reflection in their works. This tendency is typical for Western European Art. At the same time, it has been explicitly expressed in the works of Russian animal artists. Compared with European Animal Art of the 17th-18th Centuries, Russian ‘Kunstkammer drawing’ and how the class of ‘animal and birds’ was organised looked like a real innovation. These two factors have contributed to the creation of a full-fledged animalistic image. The author underlines that the main principle of imitation of nature was at the basis of teaching in the Russian school. It eventually led to the formation of the genre with its complex, distinctive features. These unique features was observed in the animal art of the 19th Century, mainly in the form of hippique images.

Nevertheless, there was an attempt to combine two separated historical periods— the 18th and 19th Centuries, which demonstrated different images, approaches (animal naturalia of the 18th Century and horse characters of the 19th Century). The author, here, tends to talk about Russian Animalism of the 19th Century, one of the most explored ones. Doing so underlines the importance of animal art of the two periods as a historically conditioned cultural phenomenon in the relationship between genres of Fine Art and trends of the time. The historical and artistic method made it possible to identify the connection between these two eras in which Animalism was expressed significantly. Its originality is that it combined two diverse eras into one national whole.

Submitted: December 20, 2020;  Revised: 12 February 2021; Accepted: 8 April 2021
Assembly Elections of India, 2021: Revisiting Assam
Authors: Kumar Sarma Pranjit , Bhattacharyya Rituparna
Published: June 2021

In India,  Assembly Elections were held in Assam, West Bengal, Kerela, Tamil Nadu and Puducherry in the first half of 2021. Driving this study is an attempt to analyse the election results of the state of Assam where Bharatiya Janata Party (BJP) and its allies, Mitrajot or National Democratic Alliance (NDA), successfully defeated the Indian National Congress (INC), and its allies, Mahajot (Grand Alliance). Drawing primarily upon secondary data and applying GIS techniques, the study makes a critical analogy of how Mitrajot managed to accomplish victory.
This is a solicited article. Submitted: 10 May 2021; Accepted: 24 June 2021.
Генерация анизотропных турбулентных полей скорости на основе рандомизированного спектрального метода
Authors: Александров Анатолий Витальевич , Alexandrov A V , Дородницын Людвиг Вацлавович , Dorodnicyn Ludwig W , Дубень Алексей Петрович , Duben Aleksei Petrovich , Колюхин Дмитрий Романович , Kolyukhin Dmitry Romanovich
Published: June 2021

Предлагается методика генерации синтетических полей турбулентных пульсаций
скорости, основанная на рандомизированном спектральном методе. Генерируемые
поля обладают нулевой дивергенцией и заданными свойствами анизотропии и пространственной неоднородности. Расчет канонической задачи о развитом турбулентном течении в канале, использующий сгенерированные турбулентные поля, демонстрирует хорошее совпадение результатов с данными прямого численного моделирования.
Исследование RANS/ILES методом влияния дросселирования на пульсации давления в многомодульном сверхзвуковом воздухозаборнике
Authors: Любимов Дмитрий Александрович , Lyubimov Dmitriy Alexandrovich , Честных Александра Олеговна , Chestnykh Aleksandra Olegovna
Published: June 2021

С помощью RANS/ILES метода проанализировано влияние дросселирования одного из модулей в трехмодульном высокоскоростном модельном воздухозаборнике на течение, уровень и спектры пульсаций давления в каждом из модулей. Дано краткое описание метода расчета и использованных граничных условий. Получены уровни OASPL в модулях воздухозаборника в зависимости от типа торможения потока. Выявлено влияние дросселирования одного из модулей на течение и особенности 1/3-октавных спектров в соседних модулях.
INFLUENCE OF A BLEND OF DIETARY ESSENTIAL AMINO ACIDS ON GROWTH, ENZYMATIC ACTIVITY, AND INTESTINAL HISTOLOGY OF BLUE DISCUS
Authors: SANTOS Ruda Fernandes Brandão , SIQUEIRA Mayara Schueroff , REIS Ryuller Gama Abreu , SILVA Weliton Vilhalba , ZIEMNICZAK Henrique Momo , HONORATO Claucia Aparecida
Published: June 2021

Symphysodon aequifasciatus is a fish with a disk-shaped body and bright colors, important characteristics of ornamental fish. We evaluated amino acid supplementation strategies to reduce crude protein in the diet for evaluation of performance, the content of digestive enzymes, liver metabolism, and intestinal histopathology. A total of 180 fish were randomly distributed in 12 separate 50 L glass aquariums, consisting of a completely randomized design with four treatments (DC - Control diet with 34.4% crude protein; DL - Control diet plus 1% of lysine; DEAA - Control diet plus 1% free essential amino acids (threonine, phenylalanine, leucine, valine, arginine, and tryptophan); and DHP - Diet with a high level of crude protein 48.4%), three repetitions, lasting 60 days. The use of DL and DEAA diets resulted in higher intestinal villus height and higher zootechnical performance. The use of DL diet increased alkaline phosphatase and digestive amylase activity. The use of DHP diets promotes severe liver changes due to increased activity of Alanine aminotraserase. Therefore, it was possible to observe that the use of amino acids can supply the nutritional need of blue discus. Supplementation of diets with AAs allows the reduction of dietary protein, which is a strategy for feeding management.
Normalization of double-circuit overhead line magnetic field inside Khrushchev building
Authors: Chunikhin K. V. , Grinchenko V. S.
Published: June 2021

This paper deals with the mitigation of 110 kV double-circuit overhead line magnetic field inside five-story Khrushchev buildings. We show that the magnetic field can exceed the reference level 0.5 μT in 90 % part of living space. To mitigate the magnetic field, we propose the inverted L-shaped grid shield with conductors on the wall and in the attic of the building. Using the analytical model of the grid shield and the numerical simulation, we determine the parameters of the L-shaped grid shield which provides the magnetic field normalization in 97 % part of living space. Further improvement of the grid shield profile, in particular, the placement of some conductors in the basement, allows to reduce the quantity of metal of the shield by 15 % while maintaining the shielding efficiency. Also we consider the magnetic field normalization for the overhead line with a rated current of 500 A. In this case, the quantity of metal of the grid shield increases 2.74 times.
TECHNOLOGICAL FIXTURES FOR MACHINING LARGE-SIZED THIN-WALLED SHELLS OF COMPLEX PROFILE
Authors: Oliinyk Svitlana , Kalafatova Lydmila
Published: June 2021

The paper analyzes the structure of technological fixtures for the positioning and fixing of large-sized thin-walled pyroceram shells as a factor affecting the dynamic characteristics of the grinding system. The solution to the problem of ensuring the dynamic stability of the «mandrel-workpiece» subsystem is necessary to increase the efficiency of shell machining in present conditions. Studying the vibrations frequency spectrum of the technological system during grinding has made it possible to determine their sources. The magnitude and frequency of vibrations depend on the mandrel structure - the clamping fixture. The study results are the requirements for a new mandrel structure, considering the dynamic stability of the technological system.
TO THE QUESTION OF THE CALCULATING OF THE SPECIAL DEVICES CHARACTERISTICS WITH A MAGNETIC SYSTEM BASED ON THE PERMANENT MAGNETS
Authors: Kriachok Alexandr , Reutskyi Mykola , Sushko Dmytro
Published: June 2021

The creation of modern computer-aided design systems for devices and electrical machines of new generation, built on the basis of permanent magnets, necessitates the development of new mathematical models and effective computational algorithms. Based on mathematical models and using IT technologies, it is possible to develop both separate functional CAD blocks and an integrated system for calculating device parameters and modeling its characteristics. The paper considers a typical design of an electromechanical device with permanent magnets, which create a field with specified characteristics in the working area. At the first stage of the study, the heterogeneity of the environment was not taken into account. To calculate the strength of the magnetic field created by rectangular magnets, two mathematical models were obtained. This approach made it possible, first, to check the results of calculations and, secondly, to use mathematical models for comparative analysis when performing numerical modeling of the magnetic field characteristics for a system built, for example, using cylindrical magnets. On the foundation of developed mathematical model, an algorithm for analyzing the initial characteristics of a special device with permanent magnets is proposed.
Devices of this type can be used to register small displacements. At the same time, the very scheme of the magnetic system and mathematical models describing the properties of the magnetic field can be used in the development of other types of electrical devices built using permanent magnets. A number of experiments on numerical simulation of the magnetic field pattern in the working area of the device were performed in the work. The results of the sensor signal simulation during the movement of the test body are also presented.
DESIGN OF THE ARCHITECTURE OF AN AUTOMATED BIBLIOGRAPHIC SYSTEM
Authors: Tsybulnyk Serhii , Bidnyk Danylo
Published: June 2021

The development of information and computer technologies has led to the need to evolve the concept of universal bibliographic control. The creation of the Internet and web technologies has allowed this concept to reach a new level by creating a number of common international standards. In addition, to ensure control and exchange of bibliographic information public bibliographic and scientometric databases were created. Today, software for managing bibliographic records is in demand in various countries in Europe and America. The most popular software in these countries is EndNote, RefWorks, BibTeX and Zotero. The development of such automated bibliographic system and the adaptation of its functionality to standards and requirements within Ukraine is relevant for a number of reasons. The main reasons are the need for every scientist and lecturer of higher education institutions to confirm their scientific achievements when hiring, submitting scientific work to various competitions, to obtain a scientific degree and so on. Today the rapid development of information and computer technology allows us to abandon the list of scientific papers in manual mode and move to the use of specialized software on smartphones. That is why the architecture of an automated bibliographic system, which is developed as a mobile application based on the Android operating system, was designed. Java is chosen as the programming language in which the software will be written, as the vast majority of the Android operating system is written in this language. A number of technologies were chosen for the selected operating system. They will simplify the process of developing a mobile application. The three-layer architecture of the automated bibliographic system is designed on the basis of the multilevel model of architecture and the MVVM template. This architecture allows to provide the main non-functional characteristics of the quality of the developed software, as well as to effectively implement the rules of business logic within the object-oriented programming paradigm.
Indicators of accuracy for determining the coordinates of radio emission sources in the short wave direction finding network
Authors: Kobziev Anatolij , Murzin Mykhailo
Published: June 2021

Direction finding networks have found application in radio monitoring, radio intelligence and passive radar systems. The operation of the direction-finding network in the short-wave range has a number of distinctive features, namely, long range of direction finders (up to several thousand km) due to ionospheric propagation of radio waves and high sensitivity of narrow-band signal receivers. In addition, the distance between direction finders can be hundreds or thousands of kilometers. Therefore the calculations should be carried out due to the location of the direction finders and radio sources on a spherical surface. In this work, analytical relationships are obtained for calculating the accuracy indicators of the estimation of coordinate information (latitude and longitude) at the output of the direction finding network in a rather general form in relation to the features of the short-wave range. The problem is solved in a geographic coordinate system for an arbitrary number of direction finders (two at least) and with their arbitrary location on the surface of Earth. To carry out a comparative analysis and assess the quality of coordinate information for various options for placing direction finders, it is proposed to display accuracy indicators using working zones (for example, round). The use of working areas allows a visual assessment on the map overall spatial pattern for accuracy indicators direction-finding network. The results of the calculation of working areas direction-finding network shortwave when placing it on the territory of Ukraine in the case of the smallest real errors direction-finding, and a mutual separation distance finders maximum permissible selected. The calculation results reflect the limiting possibilities for the accuracy of determining the coordinates of radio emission sources for such a direction finding network with a minimum number of direction finders (3 or 4). The given method of calculating working zones allows for the implementation of the best accuracy indicators to choose a specific option for placing direction finders on the territory of the country, taking into account the influence of all factors (approach of positions, availability of access roads, conditions for accommodating service personnel, etc.). As an example, the work considers 3 options for the location of direction finders with the maximum separation on the territory of Ukraine. The developed technique can also be used for other passive radar systems with direction finding coordinates, when it is necessary to take into account the spherical form of the Earth. Such a system can include two or more aerial reconnaissance aircraft with direction finders on board, as well as one aircraft or unmanned vehicle that determines coordinates by the method of multiple direction finding on the flight route.
APPLICATION OF THE CORRELATION ANALYSIS MATHEMATICAL APPARATUS FOR DETERMINATION THE LEAD–ACID BATTERIES MANAGEMENT AND STATUS CONTROL MINIMUM DIAGNOSIS
Authors: Makogon Helen , Suchko Roman , Moskalenko Viktor , Kalinin Igor , Burdin Sergiy , Iksarytsia Viktoriia
Published: June 2021

The subject matter of the article is the lead–acid batteries carrier and management. The goal of the study is the development of a methodology for assessing the lead–acid batteries’ parameters and to provide recommendations for their long–term management and carrier in the army operation. The tasks to be solved are: on the basis of the lead–acid batteries operation experience to define a set of diagnostic parameters on which it is possible to draw a conclusion about the technical state of a battery and change of its electric, operational and design properties; to determine the correlations between the properties of the battery and make their assessment based on the established criteria; to build a diagnostic graph–model of causal relationships of a battery’s parameters in the form of a correlation galaxy; to justify the lead–acid batteries carrier and management minimum diagnosis which can be carried out during their life cycle management та status control under the lack of time. General scientific and special methods of scientific knowledge are used. The following results were obtained: The set of diagnostic parameters to assess the battery technical state was determinated. Statistical data processing using the mathematical apparatus of correlation analysis was done. The diagnostic graph model of a lead–acid battery in the form of a correlation galaxy was constructed. The lead–acid batteries carrier and management minimum diagnosis during the life cycle was determined. Conclusions. Analysis of the experience of the lead–acid batteries operation determines a set of diagnostic parameters, which can be used to draw a conclusion about the technical state of a battery and change of its electric, operational and design properties. As generalized diagnostic parameters of the battery technical state can be considered the State of Health and the State of charge. Statistical data processing using the mathematical apparatus of correlation analysis allows to determine the causal and dependencies between the battery’s parameters and make their assessment based on the established criteria. Presentation of generalized results in the form of a correlation galaxy makes it possible to build a diagnostic graph–model of battery in the form of a correlation galaxy. Control of the SoC and SoH of the lead–acid battery will ensure the monitoring of the remaining charge, as well as the issuance of a warning about the need to replace the battery. A promising direction in the development of battery operation can be considered the development of battery–powered trackers – software and hardware devices capable of caring for battery care and battery management.
ANALYSIS OF THE POSSIBILITY OF USING BATTERIES OF THE LATEST TECHNOLOGIES ON SAMPLES OF ARMORED WEAPONS AND MILITARY EQUIPMENT
Authors: Андрєєв Володимир , Чорнобай Валентин , Бабкін Юрій , Таран Ольга , Кот Володимир , Аненкова Олена
Published: June 2021

The subject matter of the article is mass and dimensional characteristics of batteries, their design, electrical, operational parameters and energy capabilities. The goal of the study is the possibility of using maintenance-free batteries on samples of armored weapons and military equipment.  The tasks to be solved are: to analyze the existing technologies for the batteries production, their advantages and disadvantages given the peculiarities of the operation of military equipment and the main technical characteristics of the batteries; by statistical data processing to investigate the dependences of “starter” discharge modes and energy capabilities of the batteries manufactured by technologies of different generations; to investigate the possibilities of constructive implementation of power supply formation taking into account possible design changes in the engine starting system, ensuring the necessary charge stability and compensation for exceeding the cost of gel and Absorbed in Glass Mat (AGM) batteries  in comparison with the cost of the type 12ST85 ones. General scientific and special methods of scientific knowledge are used. The following results were obtained: The existing technologies of battery production, their advantages and disadvantages have been analyzed taking into account the peculiarities of the operation of military equipment and the main technical characteristics of batteries. The dependences of the “starter” discharge modes and the energy capabilities of batteries made by different technologies generations have been studied. Possibilities of constructive realization of power supply formation taking into account available constructive changes in the engine electric start system, providing the necessary charge stability and compensation for excess cost of gel and AGM batteries compared to the cost of batteries type 12ST85 have been investigated. Conclusions. Using at the samples of armored vehicles and military equipment batteries made by modern technology does not require fundamental structural changes in the electrical equipment of the machine. To meet the requirements of the standards for voltage parameters in the on-board armored weapons and military equipment networks, it is necessary to install an appropriate voltage relay regulator. The issue of exceeding the cost of gel and AGM batteries compared to the cost of type 12CT-85 ones can be compensated by the absence of costs for operating materials, maintenance personnel as well as the long service life of gel or AGM batteries compared to conventional lead-acid ones.
Implimentation of Novel Framework For Efficient Data Gathering With Multiple Mobile Sink Sensor Nodes In WSN
Authors: Abassi Saim , Anis Irfan , Kashif Muhammad , Tayab Usman Bashir
Published: June 2021

In couple of years, the great research towards oceanographic data transmission and submerged impurity the Submerged Wireless Sensor Networks are getting great consideration. SWSN includes issues such as link sustainability, time to begin interaction, data loss due to real-time transmission attempts and transmission range. The aforementioned complications have been approached through different routing configurations, but none of these can handle transmission efficiently. In this paper we proposed a framework of network in depth based data acquisition system with simulation and experimental results. The system model has been efficiently transmit data (Turbidity, Temperature and PH) in a region (Indus River) using the smart cluster sensor nodes and acquires result of 6.5 to 31 N.T.U of turbidity. The experimental results proved that the projected work improves the performance of the data transmission in Submerged Wireless Sensor Networks.
Role of Organic/Sulfide Ratios On DNRA Cultivation And The Microbial Community Structure of A Co-Driven Sequencing Biofilm Batch Reactor
Authors: Li Xiaoling , Zhao Jianqiang , Zhang Yuhao , He Jiaojie , Ma Kaili , Liu Chun Shuang
Published: June 2021

Denitrification and dissimilatory nitrate reduction to ammonium (DNRA), are two competing pathways in nitrate reducing process. In this study, a series of C/S ratios from 8:1 to 2:4 was investigated in a sequencing biofilm batch reactor (SBBR) to determine the role of reducers (sulfide and acetate) on their competition. The results showed the proportion of DNRA increased in high electron system, either in organic rich or in sulfide rich system. The highest DNRA ratio increased to 16.7% at the C/S ratio of 2:3. Excess electron donors, particularly sulfide, were favorable for DNRA in a limited nitrate environment. Moreover, a higher reductive environment (ORP <-400 mV) can be used as an indicator for the occurrence of DNRA. 16s RNA analysis demonstrated that Grobacter was the main functional bacteria of DNRA in the organic rich system, while Alphaproteobacteria and Desulfomicrobium were dominant DNRA bacteria in the sulfide rich system. DNRA cultivation could enrich nitrogen conversion pathways in conventional denitrification systems. This provides the great insight into nitrogen removal in high nitrogen containing sewage with low C/N.
Identification And Validation of Pivotal Genes Related To Meniscus Senescence Based On Gene Expression Profiling Analysis And In Vivo And In Vitro Models Detection
Authors: Chen Ming , Zhou Siqi , Shi Huasong , Gu Hanwen , Wen Yinxian , Chen Liaobin
Published: June 2021

Background: The compositional change in the meniscus with aging would increase the tissue vulnerability of the meniscus, which would induce meniscus tearing. Here, we investigated the molecular mechanism of age-related meniscus degeneration with gene expression profiling analysis, and validate pivotal genes in vivo and in vitro models.Methods: The GSE45233 dataset, including 6 elderly meniscus samples and 6 younger meniscus samples, was downloaded from the Gene Expression Omnibus (GEO) database. To screen the differential expression of mRNAs, identify the miRNAs targeting hub genes, and forecast the potentially toxic drugs, we completed a series of bioinformatics analyses, including functional and pathway enrichment, protein-protein interaction network, hub genes screening, construction of a lncRNA–miRNA–mRNA network, and molecular docking of potential drugs. Furthermore, crucial genes were examined in human senescent menisci, mouse senescent meniscus tissues and mouse meniscus cells stimulated by IL-1β.Results: In total, the most significant 4 hub genes (RRM2, AURKB, CDK1, and TIMP1), 5 miRNAs (hsa-miR-6810-5p, hsa-miR-4676-5p, hsa-miR-6877-5p, hsa-miR-8085, and hsa-miR-6133) that regulated such 4 hub genes, and potential toxic drugs (Cladribine, Danusertib, Barasertib, Riviciclib, and Dinaciclib) that had a targeting effect on these genes, were finally identified. Moreover, these hub genes were decreased in meniscus cells in vitro and meniscus tissues in vivo, which indicated that hub genes were related to meniscus senescence and could serve as potential biomarkers for age-related meniscus tearing.Conclusions: In short, the integrated analysis of gene expression profile, co-expression network, and models detection identified pivotal genes, which elucidated the possible molecular basis underlying the senescence meniscus and also provided prognosis clues for early-onset age-related meniscus tearing.
Defining the true hardness of materials harder than single crystal diamond
Authors: Zhan Guodong (David) , Liu Jin , Wang Pei , Wang Liping , Yan Xiaozhi , Zou Yongtao , He Duanwei , Gooneratne Chinthaka , Xu Jianhui , Alalsayednassir Alawi , Moellendick Timothy
Published: June 2021

With the development of new synthesis methods and chemistries, a number of new superhard materials have been reported to be harder than diamond. While such materials are highly desirable due to their wide-ranging applications, there are some inherent uncertainties in the methods utilized to determine and define the hardness of such materials. In this paper, we employed the Vickers Hardness Tester to measure the hardness of nine ceramic and superhard materials within a well-defined criteria and methodology, for the reliable assessment of the hardness of these new superhard materials. These findings and the developed testing method have broad implications in the characterizing of new and emerging superhard materials, leading to new discoveries.
A novel biosurfactant producing Kocuria rosea ABR6 as potential strain in oil sludge recovery and lubrication
Authors: Akbari Elham , Maal Keivan Beheshti , Rasekh Behnam , Karbasiun Farahnaz , Emami Zarrin dokh , Yazdian Fatemeh
Published: June 2021

At various stages of crude oil refining, solid and semi-solid wastes, known as petroleum sludge, are produced. Accumulation of oil waste in the refinery leads to reduced efficiency of oil refining and its release causes environmental pollution Biosurfactant-producing isolates were isolated from the oil reservoirs of the Isfahan refinery, Iran, and screened by oil expansion test, droplet collapse, and surface tension reduction measurement. Oil recovery from oil sludge was measured under constant conditions. The effect of factoring biosource lubrication on crude oil in pipelines was investigated in vitro. Also, the optimization of biosurfactant production in different conditions was measured as a single factor and Response surface Methodology. The best biosurfactant-producing bacterium was identified as Kocuria rosea ABR6, and its sequence was registered in the gene bank with access number of MK100469 registered. Chemical analysis proved that the biosurfactant produced was a lipopeptide. 7% of crude oil was recovered from petroleum sludge by biosurfactant obtained from Kocuria rosea ABR6.Also, the speed of crude oil transfer in pipelines was reduced from 64 seconds to 35 seconds. The highest biosurfactant production was measured at pH 9, aeration rate of 120 rpm and 96 hours after incubation. The use of biosurfactants produced by Kocuria rosea ABR6 is recommended to remove oil sludge and lubricate oil in pipelines recommended in the oil industry
Screening and Identification of Key Biomarkers in Low-Grade Gliomas: Evidence from Bioinformatic Analysis
Authors: He Dong , Qin Zhen , Gao Taihong , Yang Fan , Guo Hua , Xin Tao , Zhang Rui , Sun Jun , Liu Qian , Qi Pang
Published: June 2021

Background: Low-grade glioma (LGG) is one of the most common brain tumors in the world. Surgical resection is often regarded as the first choice for treatment. Patients with LGGs have a longer survival time than other types of gliomas, but risks of recurrence exist which often transforms the initial LGGs to malignant glioblastomas (GBM). For standardized therapy, adjustment in the treatment options based on early assessment of the recurrent risk of LGGs may improve the outcome of the patients. Considering that the molecular mechanisms beneath the recurrence of LGGs, as well as the detailed differences between the primary and recurrent LGGs still remain unclear, we aim to identify the critical genes that are specifically involved in the recurrence of LGGs. Method: The Cancer Genome Atlas (TCGA) dataset of the primary and recurrent LGGs (TCGA-LGG) was therefore downloaded for the subsequent investigation. By performing differential expression and functional enrichment analyses followed by a module examination based on STRING and Cytoscape.Results: A total of 413 DEGs were identified, consisting of 187 downregulated genes and 226 upregulated genes. We further integrated the enriched functional pathways of these DEGs, which led to the identification of five hub genes--- GFAP, AQP4, KCNJ10, SLC1A2 and SLC1A3. The subsequent survival analysis indeed showed that these five genes may be closely involved in the recurrence and progression of LGGs. Conclusion: The identification of DEGs and hub genes in LGGs help us better understand the development, progression, and recurrence mechanisms of LGGs. Our research evidently suggested that ion/water homeostasis and neurotransmitters, two major factors in tumor microenvironment, may play important roles in the tumorigenesis, especially recurrence of LGGs, and it may provide potential targets for diagnosis and treatment of LGGs.
Tourists Preferences in Visiting Heritage Sites in China
Authors: Jebbouri Abdelhamid , Zhang Heqing , Bouchiba Nasser
Published: June 2021

Tourism is a way of recreation, which involves a person’s travel to another city, country, and even to another continent. Travel is different, and any connoisseur can choose a vacation to their liking: active, educational, wellness, religious, beach, or rural. Tourism helps people escape from everyday problems, learn something new, and get an unforgettable aesthetic satisfaction. Also, such a vacation helps not only to learn the cultures of other countries and peoples but also contributes to the personal development of any traveller. In general, it allows people to combine relaxation with learning new things. However, different tourists have different preferences, so their motivation to visit specific cities, countries, or regions are also different. This study aims to provide tourists in China with an up to date and specific typology based on centricity and experience. Besides, the motive behind the work presented in this paper is to identify the different types of tourists in China, analyse their preferences, and as a result, create their holistic profile. Several studies from China already have information on the factors that influence this typology. In general, they include characteristics of travel (for example, on-site activities, prior knowledge) and some sociodemographic characteristics. This study shows that, in practice, there are small differences in preferences between local day trippers and those travelling for several days from remote regions of China.
Hub Genes Related to the Pathogenesis and Progression of Colorectal Cancer and Adenoma by Integrative Bioinformatics Approaches
Authors: HUANG Yuxuan , CUI Ge
Published: June 2021

Aims: To utilize the bioinformatics to analyze the differentially expressed genes (DEGs), interaction proteins, perform gene enrichment analysis, protein-protein interaction network (PPI) and map the hub genes between colorectal cancer(CRC) and colorectal adenocarcinomas(CA).Methods: We analyzed a microarray dataset (GSE32323 and GSE4183) from the Gene Expression Omnibus (GEO) database. Differentially expressed genes (DEGs) in tumor tissues and non-cancerous tissues were identified using the dplyr and Venn diagram packages of the R Studio software. Functional annotation of the DEGs was performed using the Gene Ontology (GO) website. Pathway enrichment (KEGG) used the WebGestalt to analyze the data and R Studio to generate the graph. We constructed a protein–protein interaction (PPI) network of DEGs using STRING and Cytoscape software was used for visualization. Survival analysis of the hub genes and was performed using the online platform GEPIA to determine the prognostic value of the expression of hub genes in cell lines from CRC patients. The expression of molecules with prognostic values was validated on the UALCAN database. The expression of hub genes was examined using the Human Protein Atlas. Results: Applying the GEO2R analysis and R studio, we identified a total of 471 upregulated and 278 downregulated DEGs. By using the online database WebGestalt, we identified the most relevant biological networks involving DEGs with statistically significant differences in expression were mainly associated with biological processes involved in the cell proliferation, cell cycle transition, cell homeostasis and indicated the role of each DEGs in cell cycle regulation pathways. We found 10 hub genes with prognostic values were overexpressed in the CRC and CA samples.Conclusion: we found out ten hub genes and three core genes closely associated with the pathogenesis and prognosis of CRC and CA, which is of great significance for colorectal tumor early detection and prognosis evaluation.
Factors Influencing Failure to Undergo Interval Cholecystectomy After Percutaneous Cholecystostomy Among Patients With Acute Cholecystitis: a Retrospective Study
Authors: Peng Yao , Chang Zhihui , Liu Zhaoyu
Published: June 2021

Background: Percutaneous cholecystostomy (PC) with interval cholecystectomy is an effective treatment modality in high-risk patients with acute cholecystitis. However, some patients still fail to undergo interval cholecystectomy after PC, with the reasons rarely reported. Hence, this study aimed to explore the factors that prevent a patient from undergoing interval cholecystectomy.Methods: Data from patients with acute cholecystitis who had undergone PC from January 1, 2017, to December 31, 2019, in our hospital were retrospectively collected. The follow-up endpoint was the patient undergoing cholecystectomy. Patients who failed to undergo cholecystectomy were followed up every three months until death. Univariate and multivariate analyses were performed to analyze the factors influencing failure to undergo interval cholecystectomy. A nomogram was used to predict the numerical probability of non-interval cholecystectomy.Results: In total, 205 participants were identified, and 67 (32.7%) patients did not undergo cholecystectomy during the follow-up period. Multivariate analysis revealed that Tokyo guidelines 2018 (TG18) grade III status (odds ratio [OR]: 3.83; 95% confidence interval [CI]: 1.27–11.49; p=0.017), acalculous cholecystitis (OR: 4.55; 95% CI: 1.59–12.50; p=0.005), albumin level <28 g/L (OR: 4.15; 95% CI: 1.09–15.81; p=0.037), and history of malignancy (OR: 4.65; 95% CI: 1.62–13.37; p=0.004) were independent risk factors for a patient’s failure to undergo interval cholecystectomy. Among them, history of malignancy showed the highest predictor point on the nomogram for predicting non-interval cholecystectomy.Conclusions: TG18 grade III status, acalculous cholecystitis, severe hypoproteinemia, and history of malignancy are the factors influencing failure to undergo cholecystectomy after PC in patients with acute cholecystitis.