bluuebunny/crossref_metadata_2025 huggingface dataset:
Images of Australian Odonata wings
Authors: Tann John
Published: March 2021

A recently finished project has created an openly accessible, high-resolution, photographic library of wings of Australian dragonflies and damselflies, order Odonata. The library is an open resource for identification and research. Both male and female wings of 318 species of dragonfly and damselfly have been photographed with a specialist set-up using identified museum collection material. In general, both wings were removed from the insect body to produce an image with a minimum of visual artefacts. Each resulting image shows a pair of right wings, a scale, an identifying taxonomic name and sex.
In search of new brain biomarkers of stress
Authors: Shabanov Petr D. , Blazhenko Aleksandra A. , Devyashin Aleksandr S. , Khokhlov Platon P. , Lebedev Andrei A.
Published: March 2021

The aim: of the study was to investigate the level of ghrelin in various brain structures during a stress response in Zebrafish to a predator, to evaluate this indicator as a potential biomarker of stress, and the effect of a benzodiazepine tranquilizer (phenazepam) on stress-induced changes

Materials and methods: The object of the study was Zebrafish, or Danio rerio wild type, which was subjected to stress by exposure to a predator Hypsophrys nicaraguensis from the cichlid family. In the tail tissue, the level of cortisol was determined, in the brain – the level of total (acylated and non-acylated) ghrelin by the method of enzyme-linked immunosorbent assay. The benzodiazepine anxiolytic phenazepam (1 mg/L), a ghrelin antagonist [D-Lys3]-GHRP-6 (0.333 mg/l) and corticotropin-releasing hormone (CRF; 0.4 mg/L) were used as the pharmacological agents.

Results and discussion: Exposure to a predator, just as administering CRF, more than doubled the level of cortisol in the tail tissue. [D-Lys3]-GHRP-6 and phenazepam prevented an increase in a tissue cortisol level. Simultaneously, in the medulla oblongata and cerebellum, the phylogenetically most ancient structures, rather than in the forebrain (telencephalon) or in the midbrain (corpora bigemia), the level of ghrelin was recorded about 500 pg/g of total protein. In response to exposure to a predator, the level of ghrelin increased in the forebrain and midbrain to nanogram concentrations and moderately decreased in the cerebellum. The effect was prevented by phenazepam and [D-Lys3]-GHRP-6.

Conclusion: Increases in ghrelin in the brain in response to stressful situations can be seen as a functional brain biomarker of stress, along with increased levels of tissue cortisol levels. Both of these effects are prevented by both the ghrelin antagonist and the benzodiazepine tranquilizer. The mechanism of action of the tranquilizer is a functional antagonism between the GABAergic system of the brain and the ghrelin system.
A Secured Mobile Money Transaction Using Data Masking and Enhanced Base64 Algorithm
Authors: Logunleko Abolore Muhamin , Logunleko Kolawole Bariu , Lawal Opeoluwa Olanrewaju , Ezugwu Onyinyechi Ogochukwu D , Akinyemi Olorunsesan Sunday
Published: March 2021

There is always a need to transfer money from one user to another for either payment of services or settlement of business transactions and so on. Research has shown that traditional money transaction systems are prone to attacks through falsified deposit slips and drafts, theft of debit cards, forgery of signatures, use of false cheques and so on. Electronic money transaction is a payment performed from an electronic device which enables users to have access to their money anywhere and at any time with the aid of a network but not adequately secured. This application offers a platform independent of securing and transferring money using data masking and an enhanced base64 algorithm from one account to another. The study improves on existing money transfer and transaction systems by achieving a secured mobile money transaction system with masked and encrypted financial details both on the mobile application and also on the short message service application (Text Message Notification) sent to user’s platform which makes it difficult for third party to intercept and understand. 
An Overview on Mobile Cloud Computing
Authors: Santos Carlos , Inácio Helena , Marques Rui Pedro
Published: March 2021

Mobile cloud computing is a concept that has been gaining popularity, resulting from the synergistic integration of cloud computing and mobile computing with the goal of minimizing some of the limitations inherent in mobile computing (bandwidth, storage, autonomy, etc.) and giving greater plasticity to the services of the cloud computing providers. This new paradigm of computation has similar limitations to those associated with the paradigms that are at its origin. Therefore, it is essential that the research carried out in this area is concerned about understanding its impact on audit processes, which aim to verify and evaluate the mechanisms of the internal control system implemented to minimize threats to integrity, confidentiality, and availability of the information assets (data and/or information) stored on these platforms. Based on a literature review, this chapter aims to list a set of challenges associated with the adoption of mobile cloud computing within the scope of organizational auditing.
Virtualization in Mobile Cloud Computing (VMCC) Environments
Authors: Kumar Raghvendra , Pattnaik Prasant Kumar , Pandey Priyanka
Published: March 2021

Unfortunately, most of the widely used protocols for remote desktop access on mobile devices have been designed for scenarios involving personal computers. Furthermore, their energy consumption at the mobile device has not been fully characterized. In this chapter, we specially address energy consumption of mobile cloud networking realized through remote desktop technologies. In order to produce repeatable experiments with comparable results, we design a methodology to automate experiments with a mobile device. Furthermore, we develop an application that allows recording touch events and replaying them for a certain number of times. Moreover, we analyze the performance of widely used remote desktop protocols through extensive experiments involving different classes of mobile devices and realistic usage scenarios. We also relate the energy consumption to the different components involved and to the protocol features. Finally, we provide some considerations on aspects related to usability and user experience.
A Novel Meta-Heuristic Approach for Load Balancing in Cloud Computing
Authors: Mohanty Subhadarshini , Patra Prashanta Kumar , Ray Mitrabinda , Mohapatra Subasish
Published: March 2021

Cloud computing is gaining more popularity due to its advantages over conventional computing. It offers utility based services to subscribers on demand basis. Cloud hosts a variety of web applications and provides services on the pay-per-use basis. As the users are increasing in the cloud system, the load balancing has become a critical issue in cloud computing. Scheduling workloads in the cloud environment among various nodes are essential to achieving a better quality of service. Hence it is a prominent area of research as well as challenging to allocate the resources with changeable capacities and functionality. In this paper, a metaheuristic load balancing algorithm using Particle Swarm Optimization (MPSO) has been proposed by utilizing the benefits of particle swarm optimization (PSO) algorithm. Proposed approach aims to minimize the task overhead and maximize the resource utilization. Performance comparisons are made with Genetic Algorithm (GA) and other popular algorithms on different measures like makespan calculation and resource utilization. Different cloud configurations are considered with varying Virtual Machines (VMs) and Cloudlets to analyze the efficiency of proposed algorithm. The proposed approach performs better than existing schemes.
Building Intelligent Transportation Cloud Data Center Based on SOA
Authors: Zhang Wei , Qi Qinming , Deng Jing
Published: March 2021

This paper is targeted at issues including traditional stovepipe data center, low utilization of IT equipment and data resources as a result of rigid IT structure, high maintenance costs and high energy consumption in system operation. By taking Beijing Municipal Committee of Transport (BMCT)'s data center as an example, a way to establish distributed traffic cloud data center based on SOA (Service-Oriented Architecture) fused with cloud computing is introduced in this paper; in addition, network-aware energy conservation scheduling DENS (Data- center Energy-efficient Network-aware Scheduling) algorithm applied in cloud data center is put forward to realize the full utilization of all kinds of resources in the cloud data center. Experimental results also show the effectiveness of the proposed algorithm by comparing with traditional DENS algorithms.
Study on Secure Dynamic Covering Algorithm for E-Logistics Information in a Cloud Computing Platform
Authors: He Yan
Published: March 2021

For traditional coverage method, local adaptive weighted search is adopted for subspace reconstruction of e-logistics information, which requires significant iterative computations and leads to large coverage errors and unsatisfactory results. This paper proposes a secure dynamic covering algorithm for e-logistics information based on the basis of directional clustering for the envelope of optimization solution vectors. A data network distribution model of e-logistics information on a cloud computing platform is constructed to extract features of e-logistics information and to construct time series of information flows. The directional clustering algorithm for the envelope of optimization solution vectors is introduced to schedule features of e-logistics information. The experimental results show that the proposed algorithm has higher coverage rate, smaller error, and increases performance of e-logistics information transmission and higher application value on a cloud computing platform.
Access Control Framework Using Multi-Factor Authentication in Cloud Computing
Authors: Patel Subhash Chandra , Jaiswal Sumit , Singh Ravi Shankar , Chauhan Jyoti
Published: March 2021

The most challenging issues in cloud computing are access control and data security because users of the cloud outsource sensitive data and information to cloud provider servers, which are not within the same trusted domain as the data owner. Within cloud computing, various services and resources need protection from unauthorized use as a part of the security. Authentication is a key technology for information security. In recent years, a lot of research has been carried out throughout the world and several schemes have been proposed to improve authentication in the cloud. Remote authentication is the commonly used method to determine the identity of the remote client. In this article, the authors have proposed a systematic method for authenticating clients, namely by using a password, biometrics, and out-of-band-based access control mechanisms that are suitable for access control. The proposed system involves user ID/password, biometrics characteristics, and a mobile phone as a software token for one-time password generation.
Current Drift in Energy Efficiency Cloud Computing
Authors: Bajaj Shivani
Published: March 2021

Energy Efficiency can be defined as reduction of energy used by a given service or level of activity. In spite of scale and complexity of data centre equipment it can be highly difficult to define the proper activity that could be examined for the efficiency of energy. So there can be four scenarios which may define within the system where the energy is not utilised in an efficient manner. The main goal of Cloud service providers is creation of usage of Cloud computing resources proficiently for efficient cloud computing. Cloud computing has many serious issues such as load manager, security and fault tolerance. This chapter discusses the energy efficient approaches in cloud computing environment. The energy efficiency has become the major concern for the service providers. In this chapter, the major concern is the high lightly of resource allocation challenges and there are some which will be given in the data center energy consumption. The focus is done on the power management task and even the virtualization of saving the energy.
Efficient Fault Tolerance on Cloud Environments
Authors: Goundar Sam , Bhardwaj Akashdeep
Published: March 2021

With mission critical web applications and resources being hosted on cloud environments, and cloud services growing fast, the need for having greater level of service assurance regarding fault tolerance for availability and reliability has increased. The high priority now is ensuring a fault tolerant environment that can keep the systems up and running. To minimize the impact of downtime or accessibility failure due to systems, network devices or hardware, the expectations are that such failures need to be anticipated and handled proactively in fast, intelligent way. This article discusses the fault tolerance system for cloud computing environments, analyzes whether this is effective for Cloud environments.
A Survey of Tasks Scheduling Algorithms in Distributed Computing Systems
Authors: Chauhan Nutan Kumari , Kumar Harendra
Published: March 2021

Distributed computing system (DCS) is a very popular field of computer science. DCS consists of various computers (processors) located at possibly different sites and connected by a communication link in such a manner that it appears as one system to the user. Tasks scheduling is a very interesting field of research in DCS. The main objectives of tasks scheduling problems are load balancing of processors, maximization of system reliability, minimizing the system cost, and minimizing the response time. Obviously, it is very complicated to satisfy all of the above objectives simultaneously. So, most of the researchers have solved the tasks scheduling problem with one or more objectives. The purpose of this chapter is to produce an overview of much (certainly not all) of tasks scheduling algorithms. The chapter is covering the little much valuable survey, tasks scheduling strategies, and different approaches used for tasks scheduling with one or more objectives.
Harnessing Cloud Computing Services for E-Learning Systems in Higher Education
Authors: El Mhouti Abderrahim , Erradi Mohamed
Published: March 2021

The use of e-learning suggests the use of ICT to enhance the quality of learning and teaching. However, many higher education institutions, does not have e-learning platforms, resources and infrastructure necessary to implement this type of training. This is due to the need for high cost of basic infrastructure and applications challenges related projects it has to face. This article puts forward an overview on what is the current state of the use of cloud computing in e-learning in higher education context, where the use of computers is increasingly intensive. The article analyzes e-learning systems challenges and trends, the convenience of cloud computing for e-learning and the key benefits of e-learning on the cloud. The article exposes also some application solutions using cloud computing in e-learning for higher education, by presenting the most common architecture that has been adopted. Finally, this article discusses issues related to the implementation of cloud-based e-learning systems and presents some potential ways to overcome them.
An Analysis of the Factors Affecting the Adoption of Cloud Computing in Higher Educational Institutions
Authors: Tarhini Ali , Al-Gharbi Khamis , Al-Badi Ali , AlHinai Yousuf Salim
Published: March 2021

This article aims to examine the main factors that may hinder or facilitate the adoption of cloud computing (CC) services by higher educational institutions in developing countries, exemplified here by Oman. A conceptual model was developed through extending the technology-organization-environment (TOE) framework. Data was collected from 387 IT decision makers working in four higher educational institutions in Oman using a cross-sectional survey. Data was analysed using structural equation modelling based on AMOS 22.0. The results show that behavioural intention (BI) towards adopting CC services in higher educational institutions was influenced by top management support, relative advantage, attitudes towards change, technology readiness, complexity, government regulation, peer pressure, and data concerns in their order of influencing power. These all together accounted for 58.3% of the variance in BI. However, compatibility, vendor lock-in and external expertise did not have an influence on BI. This research provides original insight for cloud computing adoption within Oman from a managerial and IT professional perspectives. Specifically, this research would be helpful for government agencies, cloud computing providers and policy makers at higher educational institutions. It will also explain the relatively low penetration rate of cloud computing services at present, which will help in formulating strategies to encourage the adoption and acceptance of CC services by Omani higher educational institutions, where CC is still considered an innovation.
Roof to Technology Implementation
Authors: Kaur Inderbir
Published: March 2021

Cloud computing is an upcoming IT approach that presents various new economic benefits, effective rapid deployment of services to achieve ultimate benefits and goals. Cloud computing reveals an effective connection of internet and computing technologies with personal or business computing that is changing the environment of computing process by providing solutions which are designed, delivered and managed. This model is a remarkable shift from the traditional model of computing. The cloud is an attractive technology solution as it enables to reduce the total cost of ownership and giving “green computing” environment by energy saving concept. Use of Cloud computing technology in different areas provides greater opportunities in the overall development of world, especially India. This chapter throw lights on various dimensions in which cloud computing concept is used . This paper also reviews the potential and opportunities for cloud computing in the healthcare industry, tourism, defence and military applications and various another aspects.
Cloud Computing in E-Governance
Authors: Husain Mohd. Shahid , Khanum M. Akheela
Published: March 2021

Cloud Computing is becoming a rapidly accepted and deployed paradigm both by individuals and organizations alike. The government of various countries is also moving its services to cloud to offer better and just in time services to the users. This chapter explores the basic concepts of Cloud Computing, which includes the main features of Cloud Computing, the cloud deployment models, the services offered by the cloud, motivations behind adoption of cloud by organizations, in general and by the Government, in particular. We also lay an insight into the various Cloud Computing initiatives taken by the Government of India to facilitate its citizens with easy access to information/services.
Fog/Cloud Service Scalability, Composition, Security, Privacy, and SLA Management
Authors: Kaushik Shweta , Gandhi Charu
Published: March 2021

Cloud computing has started a new era in the field of computing, which allows the access of remote data or services at anytime and anywhere. In today's competitive environment, the service dynamism, elasticity, and choices offered by this highly scalable technology are too attractive for enterprises to ignore. The scalability feature of cloud computing allows one to expand and contract the resources. The owner's data stored at the remote location, but he is usually afraid of sharing confidential data with cloud service provider. If the service provider is not the trusted one, there may be a chance of leakage of confidential data to external third party. Security and privacy of data require high consideration, which is resolved by storing the data in encrypted form. Data owner requires that the service provider should be trustworthy to store its confidential data without any exposure. One of the outstanding solutions for maintaining trust between different communicating parties could be the service level agreement between them.
Confidentiality and Safekeeping Problems and Techniques in Fog Computing
Authors: Khanum Nida Kauser , Lathar Pankaj , Siddesh G. M.
Published: March 2021

Fog computing is an extension of cloud computing, and it is one of the most important architypes in the current world. Fog computing is like cloud computing as it provides data storage, computation, processing, and application services to end-users. In this chapter, the authors discuss the security and privacy issues concerned with fog computing. The issues present in cloud are also inherited by fog computing, but the same methods available for cloud computing are not applicable to fog computing due to its decentralized nature. The authors also discuss a few real-time applications like healthcare systems, intelligent food traceability, surveillance video stream processing, collection, and pre-processing of speech data. Finally, the concept of decoy technique and intrusion detection and prevention technique is covered.
Factors Affecting Students' Intention Toward Mobile Cloud Computing
Authors: Abdulfattah Fatheia Hassan
Published: March 2021

The adoption of mobile cloud computing (MCC) in education systems still faces several obstacles due to technical, environmental, psychological, and individual issues. Considering numerous advantages associated with the adoption of MCC, this article evaluates the frequency of using MCC by students at King Abdul-Aziz University (KAU) and investigates the factors that influence student intention to use MCC. A survey approach has been used to include 163 students of KAU through a random sampling. Results showed that the attitude towards MCC, perceived ease of use, perceived usefulness, social influence, accessibility of technology, individual characteristics, perceived privacy, and security are all important determinants of intention to use MCC. Findings contribute towards research and practice by revealing crucial factors that impact student intention to adopt mobile cloud computing in developing countries.
A Study of Person-Technology Fit in the Cloud Computing Classroom
Authors: Yong Jin-Han , Shiau Wen-Lung , Hou Avus CY.
Published: March 2021

Cloud computing has been critical and seen more progress in the field of education. Many educational institutions have applied the cloud computing classroom as a platform to engage students learning online. However, there remains a lack of research on users' perceived fit and performance in the context to better evaluate the efficacy of cloud computing classroom in fulfilling students' needs. This study attempts to explore whether there is a fit between students' motivations and characteristics of services provided by the cloud computing classroom, and whether this fit contributes to positive outcome of student performance. Mixed research methods were used because of novelty of cloud computing classroom context. First, propositions were extracted from in-depth interviews. Then, the propositions were converted into hypotheses and were further confirmed by a quantitative survey. The results indicated that the characteristics of the services provided by the cloud computing class room fit user's needs, and the fit significantly affects users' performance.
A Comprehensive Survey on Privacy and Security Issues in Cloud Computing, Internet of Things and Cloud of Things
Authors: Sahmim Ep Guerbouj Syrine , Gharsellaoui Hamza , Bouamama Sadok
Published: March 2021

This journal article deals with the most important existing problems of security and privacy of the Cloud Computing (CC), Internet of Things (IoT) and Cloud of Things (CoT) concepts especially confidentiality issues. With the evolution of ubiquitous computing, everything is connected everywhere, therefore these concepts have been widely studied in the literature. However, due to the systems complexity and the difficulty to control each access attempt, intrusions and vulnerabilities will be more recurrent. To tackle this issue, researchers have been focused on various approaches enforcing security and privacy. In the present article, risk factors and solutions regarding these technologies are reviewed then current and future trends are discussed.
Adoption of Cloud Computing in UAE
Authors: Srivastava Juno , Nanath Krishnadas
Published: March 2021

With the advent of new technology, the IT industry continuously strives to innovate in terms of deploying products or providing services and Cloud Computing is rapidly moving in the hype cycle. With practically all the service providers offering products and services with cloud features and functionality and investing in creating a cloud computing ecosystem, it has become important to understand what these ecosystem means to the organizations based out of UAE who have to decide whether to adopt cloud computing or shun it. There are several factors impacting an organization's decision on its choice of cloud computing adoption (like data security, Legal implications and derived benefits especially in UAE) (Al Tamimi & Company, 2005). There is a need for an assessment of cloud ecosystem in UAE which would be one of the significant factors considered cloud adoption in this region. This study analyzes the current cloud ecosystem providers in UAE and their product and services on cloud computing. It also tries to relate the relation between the cloud ecosystem and the factors impacting organization's decision to adopt cloud computing.
Cloud Computing Education Strategies
Authors: Askari Syed Hassan , Ahmad Faizan , Umair Sajid , Khan Safdar Abbas
Published: March 2021

As due to the predominant money related emergency and the developing needs, Higher Education Institutes establishments are confronting challenges in giving essential information technology backing to instructive, innovative work exercises. The higher education establishment must adventure the open doors managed by cloud computing while minimizing the related security dangers to permit access to cutting edge information technology base, server farms, and applications and ensure touchy data. In this paper, cloud computing building design for higher education organization containing the different sending models, service models and client area is proposed. We at last give the suggestions to a fruitful and effective relocation from customary to cloud based framework. This research also to discover different options for the utilization of IT, while driving colleges to enhance dexterity and get investment funds. The examination system comprised in a thorough investigation of the most recent exploration on cloud computing as a different option for IT procurement, administration and security.
From Ground to Cloud
Authors: Koutsopoulos Kostis
Published: March 2021

As technology has become an agent of immense change, it has forced upon the education system Cloud Computing, which in the form of School on the Cloud will have significant future ripple effects. In moving from ground (present conditions) to Cloud (future conditions), there is a need to examine the educational enhancements and the future ramifications of this technology. The description of these effects represents the goal of this chapter, by reviewing the major aspects of the future of Cloud Based Education and by presenting the approach and the results of a foresight exercise, which have led to the development of a series of future scenarios related to the future roles of the major education stakeholders.
A ground ice atlas of Canada
Authors: Wolfe S A , O'Neill H B , Duchesne C
Published: March 2021

This Open File summarizes ground ice information from 31 sites across the permafrost regions in Canada. The poster presents a map with photographs from each site, and estimates of ground ice abundance from segregated, wedge, and relict ice in top 5 m of
permafrost, derived from national-scale mapping by O'Neill et al. (2019; 2020). The sites represent a range of environmental conditions (climate, surficial geology, geological history, vegetation) spanning the continuous and discontinuous permafrost zones in Canada. The report in the Open File
provides detailed site descriptions, comments on the modelled ground ice abundance compared to observations of ground ice from the area, the implications of ground ice conditions for thaw processes (thermokarst), and references to key literature. The atlas illustrates the varied ground ice
conditions in northern Canada and the associated environmental conditions that control ice type and abundance. Furthermore, the atlas serves as a means to validate and improve recent national-scale ground ice mapping by identifying conditions not well represented by the modelling. This validation
has highlighted that an updated national surficial geology dataset that incorporates the latest large-scale GSC mapping would improve the model outputs in many areas by more accurately depicting the distribution of frost-susceptible sediments.
Table of Contents Vol 20, No 1 (2020)
Authors: Office Editorial
Published: March 2021

No abstract available.
Свойства монотонно линейно связных множеств
Authors: Tsar'kov Igor' Germanovich
Published: March 2021

Изучаются монотонно линейно связные множества, а также сильно и слабо связные по Менгеру множества. Вводится новое понятие $\varepsilon$-солнечности и устанавливается его связь с понятием солнечности. Доказывается, что ограниченно компактные солнца в $C(Q)$ являются монотонно линейно связными множествами.
Библиография: 14 наименований.
Положительные решения суперлинейных эллиптических задач с разрывными нелинейностями
Authors: Pavlenko Vyacheslav Nikolaevich , Potapov Dmitriy Konstantinovich
Published: March 2021

Рассматривается эллиптическая краевая задача с однородным граничным условием Дирихле, параметром и разрывной нелинейностью. Положительный параметр входит в нелинейность мультипликативно, при этом изучаемая задача имеет нулевое решение при любом значении параметра. Нелинейность на бесконечности имеет суперлинейный рост. Топологическим методом доказывается существование положительных решений исследуемой задачи.
Библиография: 30 наименований.
О вещественной каустике типа $E_6$
Authors: Sedykh Vyacheslav Dmitrievich
Published: March 2021

В работе доказано, что многообразие неособых точек устойчивого ростка вещественной каустики типа $E_6$, а также многообразия точек трансверсального пересечения его гладких ветвей, состоят только из стягиваемых связных компонент. Вычислено количество связных компонент этих многообразий.
Библиография: 5 наименований.
Effects of the Advance Ratio on the Evolution of Propeller Wake
Authors: Baek D. G. , Jung J. H. , Yoon H. S.
Published: March 2021

This study numerically carried out the propeller open water test (POW) by solving Navier-Stokes equations governing the three-dimensional unsteady incompressible viscous flow with the turbulence closure model of the Κ-ω SST model. Numerical simulations were performed at wide range of advance ratios. A great difference of velocity magnitude between the inner region and the outer region of the slipstream tube forms the thick and large velocity gradient which originates from the propeller tip and develops along the downstream. Eventually, the strong shear layer appears and plays the role of the slipstream boundary. As the advance ratio increases, the vortical structures originated from the propeller tips quickly decay. The contraction of the vortices trace is considerable with decreasing the advance ratio.
The Small Hydropower Plant Income Maximization Using Games Theory
Authors: Sauhats Antans , Varfolomejeva Renata , Umbrasko Inga , Coban Hasan
Published: March 2021

This paper is devoted to the consideration of case of the use of small rivers energy, the current system of support relevant projects, its drawbacks and opportunities to remove them. Cooperative game theory approach is used for analysis of regime management of the small-scale hydro power plant (SHPP). Technical and economical aspects of the issue are observed. The obtained results demonstrate the validity of the cooperation for obtaining additional income.
Dendroflora of the Nataliivskyi Park (Kharkiv region, Ukraine): taxonomic diversity and monitoring of plantations
Authors: Hryhorenko Alla , Klymenko Yurii
Published: March 2021

To develop measures for the restoration of historic plantations and landscapes of the Nataliivskyi Park (Kharkiv region, Ukraine), the investigations of taxonomic composition and distribution of woody plant taxa, as well as structure of different landscape areas, were carried out in 2018–2019. The recent studies were realized according to the same protocol applied in 1997 by Y. Klymenko, and taking into account previously published data.In 1939, the dendroflora of the Nataliivskyi Park comprised about 100 taxa. Later, the number of taxa significantly decreased, and in 1950 the park’s dendroflora comprised only about 40 taxa. In 1997 there were 74 taxa reported. Since 1997, the taxonomic composition of the park’s dendroflora has been enriched by ten taxa and is currently represented by 84 taxa. Simultaneously, the number of valuable plants in the plantations decreased (only one or two plants represent some such taxa). Due to a bark beetle attack on drought-weakened trees of Picea abies and P. pungens, most of them withered. The area of allotments with Pinus sylvestris and Quercus robur remained almost the same, which indicates their stability. The area of allotments with the domination of such naturalized introducers as Acer negundo and Robinia pseudoacacia and the area of allotments with the domination of neither taxa have increased. In the landscapes, the redistribution of the types of areas appeared. The forest type of landscape became predominant, while the meadow type of landscape has almost disappeared.Hence, to restore historical plantings and landscapes, it is necessary to re-cultivate taxa represented here during the park’s heyday and remove invasive tree species. Although cuttings in protected areas are currently prohibited, our investigations showed that they might help preserve such valuable territories as Nataliivskyi Park.
Effect of Additives to Premium on Fuel Consumption
Authors: Nur Raybian
Published: March 2021

The use of internal combustion motors has various positive and negative impacts. A large number of motorized vehicles affect the high demand for fuel. Fuel oil is a vital economic object because it dramatically influences the financial entity, namely the increase in goods and services. What can do several things to reduce the high demand for this fuel, namely by looking for alternative fuels or finding fuel economy. The purpose of this study was to determine the impact of adding additives to fuel on fuel consumption. The research method applies an experimental procedure in which the percentage of mixing premium fuel with additives between camphor and eco racing with a content of 1 - 4 grams of additive for each sample tested on a vehicle. The results obtained are adding additives the properties of premium fuels change in terms of fuel consumption where the addition of several types of additives can reduce the rate of fuel consumption. The results obtained are that with the addition of these additives, the fuel consumption becomes more efficient by a difference of approximately 6 ml/minute.
RANCANG BANGUN SEPEDA DENGAN MOTOR DC 350 W
Authors: Alhamdie Aghitsya
Published: March 2021

Teknologi sekarang tidak bisa lepas dari sumber energi yang digunakan. Contohnya hampir semua kendaraan bermotor di negara-negara maju ataupun berkembang menggunakan energi bahan bakar minyak (BBM). Saat ini, sumber bahan bakar minyak semakin hari semakin menipis, maka di butuhkanlah energi lain sebagai energi alternatif baru untuk mengurangi krisis energi yang bertujuan untuk membuat energi minyak di bumi ini bisa bertahan lama dan tidak habis. Maka dari itu untuk mengurangi pemakaian BBM dibutuhkan alternatif lain untuk mengurangi pemakaian BBM ataupun minyak bumi tersebut. Alternatif nya ialah sepeda dengan menggunakan listik ataupun disebut sepeda listrik. Sepeda listrik adalah kendaraan tanpa bahan bakar minyak yang digerakkan oleh dinamo dan akumulator, yang terbagi dalam dua jenis arus, yaitu DC maupun AC. Namun di dalam penggunaan secara massal di Indonesia, motor listrik yang beredar bertipe arus DC. Sepeda listrik bisa di bilang sebagai alat tranportasi alternatif yang sangat efesien, di Indonesia sepeda listrik sangat cocok karena di Indonesia beriklim tropis, sangat cocok sebagai sarana olahraga. Sepeda listrik juga tidak menimbulkan polusi, tidak berisik, tidak memerlukan izin khusus, tidak memerlukan lahan parkir yang luas dan biaya perawatannya juga lebih rendah dari pada kendaraan bermotor atau alat transportasi lainnya.
Efficient and stable metabarcoding sequencing data using a DNBSEQ-G400 sequencer validated by comprehensive community analyses
Authors: Sun Xiaohuan , Hu Yue-Hua , Wang Jingjing , Fang Chao , Li Jiguang , Han Mo , Wei Xiaofang , Zheng Haotian , Luo Xiaoqing , Jia Yangyang , Gong Meihua , Xiao Liang , Song Zewei
Published: March 2021

Metabarcoding is a widely used method for fast characterization of microbial communities in complex environmental samples. However, the selction of sequencing platform can have a noticeable effect on the estimated community composition. Here, we evaluated the metabarcoding performance of a DNBSEQ-G400 sequencer developed by MGI Tech using 16S and internal transcribed spacer (ITS) markers to investigate bacterial and fungal mock communities, as well as the ITS2 marker to investigate the fungal community of 1144 soil samples, with additional technical replicates. We show that highly accurate sequencing of bacterial and fungal communities is achievable using DNBSEQ-G400. Measures of diversity and correlation from soil metabarcoding showed that the results correlated highly with those of different machines of the same model, as well as between different sequencing modes (single-end 400 bp and paired-end 200 bp). Moderate, but significant differences were observed between results produced with different sequencing platforms (DNBSEQ-G400 and MiSeq); however, the highest differences can be caused by selecting different primer pairs for PCR amplification of taxonomic markers. These differences suggested that care is needed while jointly analyzing metabarcoding data from differenet experiments. This study demonstrated the high performance and accuracy of DNBSEQ-G400 for short-read metabarcoding of microbial communities. Our study also produced datasets to allow further investigation of microbial diversity.
Reseña de otras disposiciones de interés para la Comunidad Autónoma
Authors: Núñez-Lozano María del Carmen
Published: March 2021

Listado de disposiciones por Consejerías de la Junta de Andalucia.
Vox populi: Consultas populares y procesos participativos
Authors: Brufao Curiel Pedro
Published: March 2021

Esta obra cuenta con los planteamientos dogmáticos previos necesarios para ofrecer con una base sólida el análisis jurídico de las consultas populares y los procesos de participación, algo que será bienvenido por juristas y funcionarios públicos. De este modo, desgranan los elementos propios de las consultas referendarias y no referendarias, con apoyo en la doctrina constitucional, deteniéndose especialmente en el reparto de competencias.

Sin embargo, el objeto de estudio de esta obra es especialmente la consulta popular municipal con naturaleza referendaria, sobre la que muy pocas Comunidades Autónomas han regulado la cuestión (Baleares, Andalucía, Navarra y Cataluña), donde se detienen especialmente, con habilidad de cirujano, en separar el concepto del carácter referendario o no de las consultas municipales, la iniciativa y requisitos para solicitarlas, quiénes pueden participar en ellas, el régimen de organización y de competencias, su carácter vinculante en su caso, dado que materialmente la votación hace que se puedan confundir su fronteras, como ha señalado en otoño de 2019 el Tribunal Supremo sobre una consulta relativa a festejos taurinos en San Sebastián.
La denuncia administrativa. El régimen de la Ley 39/2015, de 2 octubre, de Procedimiento Administrativo Común de las Administraciones Públicas
Authors: Fernández Ramos Severiano
Published: March 2021

El autor, que ya había realizado hace algunos años una importante aportación en materia de procedimiento sancionador, nos ofrece ahora esta espléndida monografía sobre la denuncia administrativa. La denuncia administrativa ofrece, por tanto, una transversalidad propia y características de las clásicas figuras e instituciones del Derecho administrativo. Sin embargo, como subraya el autor, pese a reconocer las mejoras introducidas en la Ley 39/2015, aún padece el ordenamiento administrativo de una insuficiente y deficiente regulación general de la denuncia. La obra presenta una estructura clásica. Así, el autor disecciona el estudio de la institución en tres capítulos; uno primero sobre los elementos conceptuales delimitadores, que, por cierto, los reconduce tempranamente, a los elementos objetivos y finalistas; un segundo capítulo dedicado exclusivamente a los elementos subjetivos, esto es, los “sujetos” presentes en la institución; y un último capítulo referido a los elementos formales y procedimentales.
THE EFFECT OF REACT STRATEGY-BASED INSTRUCTION ON 11TH GRADE STUDENTS' ATTITUDES AND MOTIVATIONS
Authors: Kaya Sergün , Gül Şeyda
Published: March 2021

The aim of this research is to examine the effect of REACT (relating, experiencing, applying, cooperating, transferring) strategy-based instruction on 11th grade students' attitudes towards biology science and biology course and their motivation towards context-based biology. The research was used quasi-experimental method. The sample of the research consisted of 50 students attending to the 11th grade of a randomly determined public school. The 'Biology Science and Course Attitude Scale' and 'Context-Based Biology Motivation Scale' was used as data collection tools. Descriptive statistics (arithmetic mean, standard deviation etc.), independent samples t-tests and ANCOVA analysis were used in the analysis of the data. According to the findings, statistically significant differences emerged in favour of the experimental group between the pre-test and post-test scores obtained from the students' attitude and motivation scales, and these findings were interpreted as the positive effect of REACT strategy-based teaching on these variables.

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Оптимизация логистических операций при построении маршрутов доставки
Authors: Poddubnaya N. , Vasilenko O. , Kovtun I.
Published: March 2021

Современный этап развития экономики характеризуется жесткой конкуренцией среди компаний транспортной отрасли. Сложившаяся ситуация побуждает компании учитывать интересы потребителей, снижая цены на предоставляемые услуги без потери ее качества, а это возможно при переходе от конкуренции к сотрудничеству и как следствие объедению и развитию экономического, технического и технологического потенциалов. Надо отметить, что при таком объединении, именно логистический подход является действенным инструментом, позволяющим получить синергетический эффект. Важной задачей интеграции имеющихся потенциалов, является учет всех операций, выполняемых в процессе создания продукта с целью снижения их стоимости и предотвращения дублирования. В статье проведен анализ общепринятых определений логистической и грузовой операций, уточнено понятие логистическая операция. Обоснована необходимость учета всех логистических и коммерческих операций при формировании сквозного тарифа. На приведенном примере доставки автомобилей из США в Украину, приведён алгоритм принятия решения при построении логистической системы. На основе сетевого графика предложены экономико-математические модели, оптимизирующие маршрут доставки.
Анализ влияния современных экологических требований на рынок топлива мирового судоходства
Authors: Pizintsali L. , Aleksandrovska N. , Rabocha Tatiana
Published: March 2021

На рынок нефти влияет целый ряд факторов. По мнению авторов, пожалуй, самым значительным сегодня, является влияние требований Международной морской организации (ИМО) по содержанию серы в судовом топливе и значительному сокращения выбросов углекислого газа водным транспортом. Экологические требования играют значимую роль в регулировании судового топливного рынка, в поиске новых видов энергии и в развитии судостроения. Влияние экологических требований в сочетании с экономическими показателями приводит к появлению новых видов энергии и развитию судостроения. Экологические ограничения MARPOL в судоходстве привели к появлению, развитию и использования новых видов энергии: топлив с низким содержанием серы; сжиженного природного газа; электрической энергии, биотоплива. Авторы подчеркивают, что в принятой Национальной транспортной стратегии Украины на период до 2030 года для решения системных проблем не предусмотрены новые пути и эффективные методы восстановления и развития водного транспорта Украины. Хотя, в ней подчеркивается, что приоритетами является использование топливоэкономичных и экологичных транспортных средств, применение альтернативных видов топлива, охрана ОС и сохранение природоохраняемых территорий при развитии транспортной инфраструктуры. Украина не располагает необходимым набором вариантов спасения от финансово-экономического кризиса, который еще более обострил коронавирус. По мнению авторов, именно последнее не позволяет строить оптимистические прогнозы по отношению к развитию флота и решению тех задач, которые предусмотрены стратегией, по крайней мере, еще несколько лет.
THE ROLE OF THE JADID PRESS IN THE FORMATION OF UZBEK LITERARY CRITICISM
Authors: Axmedova Shoira
Published: March 2021

Мақолада жадид матбуотининг ўзбек адабий танқиди тарихида тутган ўрни ҳақида фикр юритилган. Матбуот саҳифаларида адабий танқид, унинг аҳамияти, ёзилажак асарларга ижобий таъсири, умуман, адабиётнинг тараққиётидаги роли ҳақида қимматли илмий мақолаларнинг чоп этилиши унинг ривожида муҳим роль ўйнаши кўрсатиб ўтилган.
MAHMUDKHOJA BEHBUDIY AND HIS “OYINA” A LOOK AT THE HISTORY OF THE FIRST NATIONAL MAGAZINE
Authors: Rasulova Gulchehra
Published: March 2021

Ушбу тезисда бир аср муқаддам чоп этилган дастлабки журнал “Ойина” тарихи, унинг муҳаррири Маҳмудхўжа Беҳбудийнинг фидокорона фаолияти, журнал юзини кўрган публицистик материаллар характери, аҳамияти ҳамда унинг тўхталиш сабаблари ҳақида фикр юритилади.
Out-of-sample performance of the Black-Litterman model
Authors: Meyer-Bullerdiek Frieder
Published: March 2021

The aim of this paper is to test the out-of-sample performance of the Black Litterman (BL) model for a German stock portfolio compared to the traditional mean-variance optimized (MV) portfolio, the German stock index DAX, a reference portfolio, and an equally weighted portfolio. The BL model was developed as an alternative approach to portfolio optimization many years ago and has gained attention in practical portfolio management. However, in the literature, there are not many studies that analyze the out-of-sample performance of the model in comparison to other asset allocation strategies. The BL model combines implied returns and subjective return forecasts. In this study, for each stock, sample means of historical returns are employed as subjective return forecasts. The empirical analysis shows that the BL portfolio performs significantly better than the DAX, the reference portfolio and the equally weighted portfolio. However, overall, it is slightly outperformed by the MV portfolio. Nevertheless, the BL portfolio may be of greater interest to investors because -according to this study, where the subjective return forecasts are based on historical returns of a rather long past period of time-it could lead in most cases to lower absolute (normalized) values for the stock weights and for all stocks to smaller fluctuations in the (normalized) weights compared to the MV portfolio.

JEL classification numbers: C61, G11.
Keywords: Black-Litterman, Mean-variance, Portfolio optimization, Performance.