bluuebunny/crossref_metadata_2025 huggingface dataset:
Privacy Preserving Public Auditing in Cloud: Literature Review
Authors: Thangavel M.  , Varalakshmi P.  , Sridhar S.  , Sindhuja R.
Published: March 2019

Cloud computing has given a bloom to the technical world by providing various services. Data storage is the essential factor for the users who are having or working with lots and lots of data. Cloud data storage becomes the only way to store and maintain the large data, which can be accessed from anywhere and anytime. The open nature of cloud computing leads to some security issues. With respect to the cloud data storage, the Cloud Service Provider (CSP) has to provide security for the data outsourced. Data owner will be concerned on the data correctness after outsourcing into the cloud. To verify the data correctness, ensuring the state of data at the cloud data storage is needed, which is performed with the help of a Trusted Third Party Auditor (TTPA). Data owner can also perform the verification task, but it leads to computation cost and communication costs in huge amount. This survey gives a brief on public auditing schemes to explore what are all the system models designed by various researchers.
Challenges and Opportunities in Vehicular Cloud Computing
Authors: Ahmed Zeinab E. , Saeed Rashid A. , Mukherjee Amitava
Published: March 2019

Vehicular ad-hoc networks (VANET) have become an important research area due to their ability to allow sharing resources among the users to carry out their application and provide services of transport and traffic management. VANET communication allows exchange of sensitive information among nearby vehicles such as condition of weather and road accidents in order to improve vehicle traffic efficiency through Intelligent Transportation Systems (ITS). Many technologies have been developed to enhance ITS. Recently, vehicular cloud computing (VCC) has been developed in order to overcome the drawbacks VANET. VCC technology provides low-cost services to vehicles and capable of managing road traffic efficiently by using the vehicular sources (such as internet) to make decisions and for storage. VCC is considered as the basis for improving and developing intelligent transportation systems. It plays a major role in people's lives due to its safety, security, trust, and comfort to passengers and drivers. This chapter investigates the vehicular cloud computing. The authors first concentrate on architectures. Then, they highlight applications and features provided by VCC. Additionally, they explain the challenges for VCC. Finally, the authors present opportunities and future for VCC.
Future Directions to the Application of Distributed Fog Computing in Smart Grid Systems
Authors: Anzalchi Arash , Sundararajan Aditya , Wei Longfei , Moghadasi Amir , Sarwat Arif
Published: March 2019

The rapid growth of new technologies in power systems requires real-time monitoring and control of bidirectional data communication and electric power flow. Cloud computing has centralized architecture and is not scalable towards the emerging internet of things (IoT) landscape of the grid. Further, under large-scale integration of renewables, this framework could be bogged down by congestion, latency, and subsequently poor quality of service (QoS). This calls for a distributed architecture called fog computing, which imbibes both clouds as well as the end-devices to collect, process, and act upon the data locally at the edge for low latency applications prior to forwarding them to the cloud for more complex operations. Fog computing offers high performance and interoperability, better scalability and visibility, and greater availability in comparison to a grid relying only on the cloud. In this chapter, a prospective research roadmap, future challenges, and opportunities to apply fog computing on smart grid systems is presented.
Analysis of Users in an Immersive Environment for Teaching Science
Authors: Nunes Felipe Becker , Zunguze Manuel Constantino , Hannel Kelly , Antunes Fabiano Ferreira , Franco Sérgio Roberto Kieling , De Lima José Valdeni
Published: March 2019

Virtual worlds can be considered immersive e-learning environments, whose characteristics of interactivity, immersion, and collaboration can be applied in different areas of teaching, such as in the field of sciences. In this way, this chapter presents the construction of a virtual world to aid in the teaching of sciences in which different types of learning materials and simulations were developed in the OpenSim platform. A group of sixth grade students used the immersive environment for a semester, being evaluated their learning through a pre- and posttest applied together with an analysis of their learning styles, being realized a correlation between the results obtained. Added to this, usability assessments with interviews about the environment was applied. The results demonstrated the potential of virtual worlds to contribute to the adaptation of the different learning styles in a class and their contribution to the improvement of the learning process.
Virtual Learning Environments for a New Teaching Methodology
Authors: Caponata Iolanda , Ferraro Anna Pietra
Published: March 2019

The potential and new educational perspectives offered by virtual environments are the arguments with which you want to highlight the opportunity, through the experience of the simulation offered by environments such SecondLife®, to organize and expand the involvement and motivation of pupils through active participation. It will be explained, in detail, how to plan a lesson in SecondLife® after having designed and built a learning environment by creating Holodeck, Teleport, Script, and the use of numerous Tools needed to implement a teaching unit.
The Case of Literacy Motivation
Authors: Mystakidis Stylianos , Berki Eleni
Published: March 2019

The University of Patras' Library Services designed and offered to primary and secondary schools the pilot educational program “From the Ancient to the Modern Tablets”, featuring immersive multimedia learning experiences about the book history. The pilot program consisted of three stages: a playful library tour, followed by an interactive game-based digital storytelling activity with game elements, and a collaborative creative reflective hands-on activity. Utilizing the avatar psychology power, the visualization and simulation affordances of 3D immersive learning environments and the appeal of storytelling and game-based learning, the “gamified” blended narrative on the book evolution enabled learning as problem-focused, embedded and context-generated. An additional research study was conducted to investigate teachers opinions regarding the effectiveness of the 3D Virtual Immersive Environment(s); this focused on students' learning and thinking skills in the socio-cognitive, psychomotor and affective domain. This work exposes the pedagogical design, presents the socio-technical development and reflects on the initial research findings.
Learning Geography Through Serious Games
Authors: Zaharias Panagiotis , Chatzeparaskevaidou Ioanna , Karaoli Fani
Published: March 2019

Serious games have gained momentum during last and current decade and research findings indicate they can be fertile and effective learning tools. While there are several studies dealing with 2-dimensional and 3-dimensional serious games in education, there is a dearth of relevant empirical research in formal educational settings that compares their effectiveness. In this study, two versions (2-dimensional and 3-dimensional) of a serious educational game on geography, were developed and offered in eight elementary schools. An experimental process was set up and the investigation was focused on the impact of using the two game versions, regarding motivation to learn and user experience. Both versions had a positive impact on learning, confirming thus the advantages of serious games in education. 2D version had a greater impact comparing to 3D, regarding learning, while 3D version had a greater impact on motivation to learn and user experience.
The Use of Virtual Worlds in Foreign Language Teaching and Learning
Authors: Yeh Ellen , Wan Guofang
Published: March 2019

This book chapter presents, a review of the literature from 2004-2014 regarding the various models of virtual worlds used in foreign language teaching and learning, the impact of virtual world learning environments and the implications of language teaching. The study being reported aims to address the following questions: (1) What are the models of virtual worlds used in language learning instruction in K-12 and higher education; (2) How do VWLEs impact language learning in terms of motivation, communicative competency, intercultural competency, collaborative competency, constructivist learning, and sociocultural competency; and (3) What are the implications of using VWLEs in foreign language teaching and learning? Results indicate that social context and task-based learning enhanced language learners' participation and motivations. Findings also indicate that consistent use of interactional strategies encouraged learners to engage in the tasks and stay motivated. The study suggested that a VWLE offers a motivating, engaging, and multi-dynamic environment for language learners.
The Use of Digital Software Applications and Digital Atlases to Supplement Anatomy Teaching to Undergraduate Allied Health Students
Authors: Kenway Leanne C. , Bakr Mahmoud M.
Published: March 2019

Teaching anatomy has traditionally been restricted to didactic lectures and cadaveric dissection, where students are required to rote learn, without focus on analysis, conceptualisation, and clinical reasoning. A shift in pedagogical practices has occurred with rapidly developing online technologies now embedded within many university degree programs. Anatomy education has evolved to include new teaching modalities, such as computer-assisted learning including the use of 2D images or 3D models, web-based interactive games, virtual reality, augmented simulation, and haptics. Dissection courses have been found to be time-consuming and expensive, and in many universities, time committed to teaching is on the decline, there are increased costs associated with running body donation programs, and larger student numbers have led to fewer laboratory sessions available to students for learning. This chapter focuses on the use of digital atlases as a useful supplement to teaching anatomy in not only medical but all the allied health professions.
The Role of Social Entrepreneurship and Social Economy in Romanian Sustainable Business Development
Authors: Gherghina Rodica , Duca Ioana
Published: March 2019

In their scientific endeavour, the authors aim at analysing the concepts of social entrepreneurship and social economy, as well as emphasising the role these concepts play in sustainable business development and in the economic development of society as a whole. At the same time, several aspects of social enterprises are presented and their importance in the Romanian economic environment is emphasised. As these are two relatively new concepts in the social economy in Romania, the authors refer to the specialised literature throughout their research. The authors present several of the opportunities and challenges raised by social economy. The importance of financing is emphasised by means of presenting the organisations' financing sources which are specific to social economy. The conclusions to this research include some of the authors' own viewpoints, with reference to the aspects of social entrepreneurship – social enterprises – social economy and their role in overall economic development.
Innovation, Sustainability, and Organizational Change in a Social Portuguese Organization
Authors: Barbosa Fernando , Romero Fernando Cabrita , Cunha Jorge
Published: March 2019

Social economy has been a prominent topic among scholars, politicians, and practitioners. Social economy organizations are mission-driven with the purpose of creating social value, overcoming a social problem, and contributing to attain sustainable social development. In this chapter, a particular weakness underlying those organizations is addressed: lack of managerial skills and the importance of a well-structured process of strategic management and organizational innovation. Based on the analysis of a Portuguese case study, the goal is to increase the knowledge on the facilitating factors and barriers to the improvement of the quality of service and the efficiency of the management of a social economy organization, in order to understand how it creates and delivers social value and ensures its future sustainability. The findings highlight a number of best practices in the design of a structured innovation process which were supported by the Portuguese program Q3-qualifying the third sector, which may help similar organizations to improve their innovation and organizational processes.
Incorporating Global Medical Knowledge to Solve Healthcare Problems
Authors: Sen Kabir C. , Ghosh Kaushik
Published: March 2019

Global medical knowledge incorporates knowledge from diverse traditions which follow different ‘grammar', making encapsulation of medical knowledge a challenging task. Current advances in technology enable the aggregation of medical knowledge from varied traditions to confront difficult health issues for which cure is yet to be developed. In addition to accumulating knowledge from wide-ranging sources, an ideal crowdsourcing system can benefit from the use of appropriate software algorithms to select the best solution. This research suggests a step approach scheme to develop a crowdsourcing system for medical diagnosis by applying an existing classification of crowdsourcing. The proposed crowdsourcing system will involve the crowd and medical experts from across the world, who together with the help of software algorithms, could provide useful solutions for hitherto difficult to solve health problems.
Crowdsourcing as a Tool for Improving Learning in Tertiary Institutions in Developing Countries
Authors: Benna Indo
Published: March 2019

Higher education in many developing countries faces the triple challenges of inadequate funding, need to improve quality of learning outcomes, and the pressure to increase quality of graduates. Crowdsourcing offers opportunity for institutions to face these problems with little resource expenditure. The chapter describes/analyzes how crowdsourcing can be applied in curriculum and teaching material development activities through collaborative efforts of higher education institutions from different parts of the world to develop suitable curriculum for teaching English for specific purpose. The chapter analyzes the process and the evaluates the outcome of the crowdsourcing tool and suggests that its application can keep higher education institutions in developing countries in forefront of education and research innovation, and prepares members in these institutions for innovative problem solving and for the challenges of the online world.
The Influence of Crowdsourcing Business Model Into Artificial Intelligence
Authors: Szopa Anna
Published: March 2019

We observe situation in which human computation processes leverage the abilities of people via the Web to perform complex computation. In this context human intelligence is harnessed to solve computational problems that are beyond the scope of existing Artificial Intelligence (AI) algorithms. The aim of this paper is to achieve an in-depth understanding of the influence of crowdfunding business process into Artificial Intelligence and what kind of computational problems can be efficiently answered using human computation. Wisdom of crowd has been applied successfully to a range of tasks, from translating text and marking images, collecting information to building large databases and to solve problems that are difficult for machines to solve. Presented hybrid solutions will be considered as optimization- leveraging machine intelligence to help improve the accuracy and efficiency of algorithms.
Experiences in Social Innovation
Authors: Sánchez Domingo Alfonso Martín , Laso Ana García
Published: March 2019

Convergence is an opportunity to determine the possibility to train students in social skills, assuming that our universities provide valuable training in specific technical and professional skills. This study presents the strategy followed in the Mines and Energy Engineering School of the Polytechnic University of Madrid (UPM from its name in Spanish) to enhance social learning through a program based on the assembly of training practices on Mentoring, Service Learning and social consciousness (Ethics and values in engineering). In this article we discuss about social motivation through social collaboration with qualified entities in the Spanish social landscape such as Tomillo Foundation, Congregation Mary Immaculate as well as looking to a future collaboration with the Ana Bella Foundation.
Designing Effective Crowdsourcing Systems for the Healthcare Industry
Authors: Sen Kabir C. , Ghosh Kaushik
Published: March 2019

This article describes how healthcare faces many challenges. Among them is the inability of patients to seek and receive treatment based on their preferences. Patients characteristically pursue solutions to their medical problems that suit their individual needs. However, care providers and other stakeholders including healthcare insurance providers seem to ‘limit' patients' ability to access affordable and quality healthcare. Discourse in prior research has indicated that the use of crowdsourcing may provide patients access to treatments that can solve their medical problems. This article is an extension of extant research that describes the main challenges facing healthcare. It advances current research by presenting ideas through which these challenges can be mitigated. The core ideas proposed encompass the elements of crowdsourcing systems that will include participation of individuals in the crowd without any bias, enable knowledge sharing among all members of the crowd, and provide opportunities for testing the solutions proposed by the crowd.
The Standardization of Down-Streamed Small Business Social Responsibility (SBSR)
Authors: Corazza Laura
Published: March 2019

Scholars have begun to investigate the prevalence of Corporate Social Responsibility (CSR) within the context of small and medium-sized enterprises (SMEs). This paper studies the implementation of non-financial sustainability reporting tools in Italian SMEs as part of their Small Business Social Responsibility (SBSR) long supply chain compact with large multinationals. The fundamental finding of this work is that because of the down-streaming effect of CSR reporting from large companies to small ones, SMEs approach sustainability as a standard management practice. The sample is composed of 73 Italian multi-certified entities (SA8000/ISO14001/EMAS) that have published their sustainability report online between 2011 and 2013. Principal Component Analysis (PCA) was used to discover three otherwise un-observable underlying effects.
Software Process Paradigms and Crowdsourced Software Development
Authors: Hasteer Nitasha , Bansal Abhay , Murthy B. K.
Published: March 2019

Production of quality software requires selecting the right development strategy. The process and development strategies for creating software have evolved over the years to cope with the changing paradigms. Cloud computing models have made provisioning of the computing capabilities and access to configurable pooled resources as convenient as having access to the common utilities. With the recent advancements in the use of social media and advent of software development through crowdsourcing, the need to comprehend and analyze the traditional process models of software development, with regard to the changed paradigm have become ever more necessary. The changes in the way software are being created and the continuous evolution in the processes of development and deployment has created a need to understand the development process models. This chapter provides an insight on the transition from the conventional process models of software development to the software development methodology being used to develop software through crowdsourcing.
Professional and Business Applications of Social Media Platforms
Authors: Kasemsap Kijpokin
Published: March 2019

This chapter provides an overview of the challenges and benefits of social media across various industries. The use of social media has created the highly effective communication platforms where any user, virtually anywhere in the world, can freely create the content and disseminate this information in real time to a global audience. The chapter argues that professional and business applications of social media platforms can enhance business performance toward reaching strategic goals in the digital age. What are keeping various industries awake these days? Why are social media applications important to various industries? How do social media platforms apply for professional and business perspectives across various industries?
Managing Small Business Social Responsibility (SBSR) in Formalized Network Using a Euclidean Perspective
Authors: Corazza Laura , Cisi Maurizio
Published: March 2019

This chapter deepens the knowledge of inter-firm collaborations to address sustainability issues between SMEs in adopting small business social responsibility (SBSR) approaches. The study investigates the role of formal network contracts (FNCs), where aspects of SBSR are formalized into legal agreements between the networkers. For this purpose, the authors identify three management implications declined as sub-variables: control, consensus, and consistency. Institutional theory and, specifically, isomorphism and normative theory of CSR are used as lenses through which to analyze the results. The methodology applied is a deductive qualitative content analysis, while results are shown using an Euclidean perspective. The study discovers the use of FNCs to clearly govern consistency and consensus, more than to control and audit sustainability herein the network. In addition, it demonstrates a relation between network size and use of the tool.
Defining the Role of Social Media as a Contemporary Local Area Marketing Technique in Franchising
Authors: Webster Geoffrey , Hume Margee
Published: March 2019

Literature on Local Area Marketing (LAM) and social media engagement techniques for franchise businesses is scant, with Direct and Online Marketing the primary focus. It is important for franchise businesses to have a qualified understanding of social media to integrate its use as a LAM technique in their business. Problems facing franchise businesses include confusion over how social media functions within local area marketing strategy, a unified perception over how social media can be used to develop their business, and the lack of a basic theoretical model for social media engagement and LAM guidelines. This chapter examines the role of social media in LAM. It explores the franchise business attitude on new technology adoption including the use of social media. It presents a coordinated framework for the application of social media to increase awareness and enhance franchise business success, providing an important contribution to the franchise industry sector.
Organizational Memory
Authors: Ramos Isabel , Oliveira e Sá Jorge
Published: March 2019

Nowadays, the major challenge to organizations managers is that they must make appropriate decisions in a turbulent environment while it is hard to recognize whether information is good or bad, because actions resulting from wrong decisions may place the organization at risk of survival. That is why organizations managers try to avoid making wrong decisions. In order to improve this, managers should use collective knowledge and experiences shared through Organizational Memory (OM) effectively to reduce the rate of unsuccessful decision making. In this sense, Business Intelligence (BI) tools allow managers to improve the effectiveness of decision making and problem solving. In the light of these motivations, the aim of this chapter is to comprehend the role of BI systems in supporting OM effectively in the real context of a crowdsourcing academic initiative called CrowdUM.
Investigating Factors Influencing the Quality of Crowdsourced Work Under Different Incentives
Authors: Mourelatos Evangelos , Tzagarakis Manolis
Published: March 2019

Crowdsourcing is a new form of online labor, where the process of solving a problem is approached by soliciting contributions from a large group of people. In this paper, the authors attempt to investigate how different incentives affect the quality of work in such contexts, by completing the same task in three different environments: in a laboratory setting, on a social networking as well as on a crowdsourcing site. Analyzing the obtained results indicates that under different incentives, different factors contribute to the quality of work in crowdsourcing tasks. In general the research highlights that the identification of factors contributing positively to higher quality of work in crowdsourcing environments is a complex question, depending on the task at hand.
Critical Success Factors in Enterprise 2.0
Authors: Silva Ana
Published: March 2019

While evangelists and enthusiasts of Enterprise 2.0 praise the benefits of the use of social software in the workplace, the sceptics are not that convinced and some draw attention to the failures of the Knowledge Management concept and tools that were trendy some years ago. In parallel, board members and top management question the true business benefits of Enterprise 2.0 and demand proof of the potential business value prior to giving a green light to this type of investment. If it is true that some of the benefits of Enterprise 2.0 are intangible and therefore harder to measure, the impact on business performance should be observable and consequently measurable. This chapter reflects on the importance of addressing the topic of business performance when it comes to social software in the enterprise. It also discusses the importance of integrating social software into the flow of work in order to drive adoption and sustained use.
Evaluating the Business Impacts of Social Media Use With System Dynamics and Agent-Based Modeling
Authors: Pirttilä Olli , Kärkkäinen Hannu , Jussila Jari
Published: March 2019

Social media has been widely adopted as a useful business tool, especially in the domain of business to consumer marketing. However, the deployment of social media tools to business processes is hindered by the lack of concrete indicators of the effects its use has on the business process. Computer based modeling has been widely used to simulate and predict business effects in other streams of study, but relatively little in the evaluation of social media impacts. This paper argues that System Dynamics and Agent-Based Modeling have been and should be utilized in measuring social media and its impacts in business context in general, as well as in the context of business ecosystems. The authors review the current state of the use of these simulation methods in the evaluation of social media business impacts by conducting a systematic literature review.
Sustainability and Competitive Advantage
Authors: Rattalino Francesco
Published: March 2019

Sustainability and Corporate Social Responsibility have been perceived for many years by companies only as an annoyance, involving regulations and extra cost. The recent economic downturn and increasing stakeholder pressure have forced businesses to embrace the complexity and interdependencies between shareholder value and sustainable value. Sustainability-driven innovation is the key to overcoming the old conflict between economic and social objectives and, as in the case of Patagonia Inc., is paying off for a growing number of companies as it generates a sustainable competitive advantage. This chapter explores ways in which corporations can pursue economic, social, and environmental objectives simultaneously while creating shared values. It also looks into the very complex issue of measuring both the business and social impacts of shared-value strategies.
New Perspectives
Authors: Antonova Albena
Published: March 2019

As social and environmental struggles intensify, the raising economic and social role of not for profits will continue to expand globally. Not for profit organizations have the potential to mobilize digitally-enabled communities and to work on various global challenges, overcoming the limitations of governmental institutions, local and short-term perspectives of public administration and private interests of business organizations. The present research aims to reassess the business models and value creation behind NFP operational models, their role for social innovation, the impact of the new technologies and the characteristics of the emerging digital communities. Further, there will be discussed the new perspectives for NFP development as innovative instruments, protecting social interests between government and private organizations, and contributing to solve increasing social problems.
Understanding Social Business and Wellbeing at the BoP
Authors: Khalik Mahmoud , Lopez-Gomez Sara
Published: March 2019

The interest in poverty reduction has received scholarly attention from various academics studying developmental economics, the informal economy and the base of the pyramid (BoP). This chapter intends to engage with the BoP topic by reviewing research areas that are intertwined: the informal economy, the BoP and perhaps most importantly social business and wellbeing. The chapter introduces Algramo, a BoP venture from Chile that aims to reduce food poverty in Latin America. The focus of this chapter is on Algramo's activities in Colombia as a single case study to better understand the impact of three wellbeing aspects on the stakeholders involved. Although Algramo, a work in progress, is primarily focused on food poverty reduction; this chapter reveals that there are potentially much wider implications that are consistent with BoP literature. Wellbeing is important and merits further study when investigating BoP ventures. The chapter concludes with future research directions for BoP scholars and for those who are interested in the wider impacts of engaging with the BoP segment.
Green Reporting and Its Impact on Business Strategy
Authors: Constantin Dana Maria (Oprea) , Topor Dan Ioan , Căpușneanu Sorinel , Türkeș Mirela Cătălina , Anghel Mădălina-Gabriela
Published: March 2019

This chapter illustrates some aspects of the green reporting and its impact on the business strategy of an economic entity. The main objectives of this chapter are to present the green reporting and the green accounting synthesis documents and, also, to present the computer program for the green report of an economic entity. Based on the national and international literature, the authors present the concepts of the green reporting and integrated report and a computer program specifically designed to record green costs and green reporting. They present the types of green costs and the legislation related to the green reporting. The aspects presented by the authors are based on the national and international literature, specialized studies related to the topic of this study. A new theoretical-empirical framework is created by the authors through their contribution, which facilitates the identification of new ideas, themes, and debates of other issues encountered in the world business environment.
Fraud Risk Management for Listed Companies' Financial Reporting
Authors: Dănescu Tatiana , Oncioiu Ionica , Spătăcean Ioan Ovidiu
Published: March 2019

Using accurate and reliable financial information is the primary condition for successful investments on a stock exchange. Nevertheless, some major corporate scandals broke out at the 21st century horizon and concluded with a major capital market crisis in confidence. Recent events have proved that Romanian capital market is no exception. All these unfortunate scandals had in common some ingredients, among which are a poor corporate governance, a lack of accountability, and misrepresentation of financial information. This chapter relates to the need of integrity in financial reporting process, as the basis for adequate, reliable, and comprehensive information used in decision making by investors in general, institutional investors in particular. The main focus is to review the characteristics of financial information in order to identify some patterns and depict an overview for sensitive areas that may be vulnerable to fraudulent behavior, such as fair value measurements, related party transactions, revenue recognition, provisions, or asset impairment (inventories and receivables).
Understanding the Importance of the Banking System in the Romanian Tourism and Hospitality Industry
Authors: Spulbar Cristi , Ramona Birău , Trivedi Jatin
Published: March 2019

This chapter aims to provide an exhaustive overview of the importance of banking system in Romanian tourism and hospitality industry. Romania is a member of the European Union since 1 January 2007, but is not a member of the Schengen area and haven't adopted the euro currency yet. The banking system plays an essential role in financial intermediation being a major factor in raising productivity of Romanian tourism and hospitality industry. From a long-term perspective, a global perspective on the banking system can lead to the development of tourism and hospitality business. The interdependence between banking system and the tourism and hospitality industry in Romania is an increasing challenge for public and private investment. However, Romania's tourist attractions are still not capitalized due to the lack of financial investments. The Romanian tourism potential is significant, but the relatively low number of foreign tourists and even indigenous tourists reflects the lack of relevant financial investments and effective promotion.
Assessment of the Internal Control System in the Accommodation Firm and Its Relation to Performance
Authors: Erdoğan Murat
Published: March 2019

An effective internal control system will help achieve performance and profitability targets within the core objectives of the business, help to prevent the need for loss of resources, and ensure that financial reporting is realistic and reliable. The purpose of this chapter is to identify the components of the internal control system in the enterprise and to show whether these factors affect the firm performance. When the results of the study are evaluated in general, it has been determined that the elements of the internal control system of the companies have an effect on the firm performance. According to this, the control environment 1, the control environment 2, the risk evaluation, the control activities, the information and the communication, the monitoring variables are effective on the positive side and the control variables on the firm performance have positive effect on the firm performance of the operation bed capacity, the operation period, and the existence of the internal control unit.
Research on Relative Wear and Roughness Follow the Current Density in EDM Die Sinking
Authors: Tran Quang Huy , Hoang Vinh Sinh , Tran Van Khiem
Published: March 2019

EDM die sinking (called shortly EDM) is a non-traditional machining. This method is applied in concave area which cannot machining by traditional method such as deep concave, thin wall which is smaller than normal cutting tool, and especial the steel after heat treatment .
A Research on Technology for Manufacturing Body Shell of Anti-Tank Rocket
Authors: Khanh Bui Khac , Tuan Nguyen Ha , Tuyen Vu Trung , Huy Nguyen Truong
Published: March 2019

Body shell of anti-tank rocket which is a pipe part working under extreme conditions of high pressure and temperature, is manufactured from low-alloyed high quality steel 30X3MФ. The steel 30X3MΦ made in Vietnam appropriates of standard to produce body shell anti-tank rocket. The shell ensure technical requirements of composition, with very low rate of P, S and has good mechanical properties. After casting, steel billets were backward extrusion, includes 3 steps of thinned stamp, heat treatment and drawing processes, body shell fabrication is satisfied requirment of technique for anti-tank rocket shell. Results of fire testing of the body shells are in agreement with that of Russian ammunition. The body shells of anti-tank rocket which were manufactured in Vietnam conditions, satisfied desired technical requirement.
Investigation of the Effects of Technological Parameters on Surface Roughness in Extrusion Bars of Aluminum Alloy
Authors: Nguyen Trong Mai , Tran Đuc Quy , Pham Van Nghe , Nguyen Van Canh
Published: March 2019

In this research work, the result of the effects of technological parameters on surface roughness in extrusion bars of aluminum alloy were pesented. The results of this study may be used for choosing optimal parameters of extrusion process so that surface quality of extruded bar was improved.
Study Computational Simulation and Experimental of Butt-Joint by Visual-Weld Software and MIG Welding Process
Authors: Nguyen Quoc Manh
Published: March 2019

The aim of this paper is to present the simulation and experiment of the welding butt-joint aluminum alloys to low carbon steel using Visual-weld software and the metal inert gas (MIG) welding process. The workpiece is set up in a virtual environment with an area of 150 x 70 x 5 mm, a welding speed at 3.5 mm/s, and a heating source of 2.5 kW. The finite element method (FEM) is used as a powerful tool in simulating, calculating and predicting the welding stress and distortion at the early stage of the design process and development of welding products. The metallurgical process, deformation, hardness, etc. are investigated using the FEM in Sysweld software. The microstructure of the intermetallic layer is observed using scanning electron microscopy. The hardness of the intermetallic layer is examined using Vickers hardness testing. Tensile strength and bending strength are examined by tensile and compress multimeter equipment. To improve the quality of the aluminum/steel welds, the IMCs layer should be as small as possible. The experimental results are better if the welding current of range of 95 – 100 A and the welding speed is from 3.5 to 4 mm/s.
Prediction of Combustion Behavior in a Boiler Fired by Mixture of Vietnamese Anthracite and Coal Gas Using CFD
Authors: Tran Gia My , Le Duc Dung
Published: March 2019

The domestic anthracite is the most important fuel for Vietnamese thermal power plants. Due to high carbon percentage and low volatile matter it is difficult to ignite and to burn out the domestic anthracite. The rest carbon in ash is very high, in some cases approximately 40 %. To solve this problem some methods have been tested. In this research a mixture of anthracite and coal gas is considered. The purpose of the research is to describe a combustion behavior in a boiler, namely temperature, carbon and volatile matter distributions using CFD. The mixture consists of 4.3 % coal gas and 95.7% anthracite in mass. The boiler is divided into two combustion zones, the main zone 1 and the zone 2, to extend combustion area and through it to improve burning conditions for anthracite particles and to reduce NOx formation. All the anthracite mass and 1/3 coal gas volume are delivered into the zone 1, the rest of coal gas is into the zone 2. The CFD simulation is used for the zone 1. The simulation findings show that anthracite particles are ignited earlier, the mixture combustion develops in a larger space with higher temperatures, the carbon burning rate is remarkably improved due to coal gas. That means the domestic anthracite can be used better in boilers if some coal gas, 4 or 5 %, is mixed and the obtained ash can have lower unburned carbon, below 10%, and be more friendly for the environment.
Compressive Resistance of Environmental Concrete Using Fly Ash and Fine Aggregate for Replacing Traditional Sand
Authors: Nguyen Duy Liem , Duong Minh Thuan
Published: March 2019

This paper presents the production of enviromental concrete using fine aggregate and fly ash to reduce bad influences on environment. The excessive exploition of traditional sand in Mekong Delta rivers has recently caused serious landslides sweeping away a large area and making. Therefore, using alternative materials - fine aggregate to replace river sand - is very important and urgent. In addition, fly ash is one of waste products in coal-fired power plants, and, the consumption of fly ash helps decreasing landfill costs and increasing sustainable development. The compression strength of environmental concrete is obtained from 20-40 MPa using cube-shaped specimens with various compositions. The productive prices between environmental and traditional concrete are comparatively discussed
Mechanical Properties of Composites with Geopolymer Matrices Reinforced by Basalt Fabric
Authors: Petríková Iva , Marvalová Bohdana , Lampa Jiří
Published: March 2019

The tensile and bending properties of composite materials with geopolymer matrix reinforced by layers of basalt plain weave fabric were investigated experimentally. We present the results of the quasi-static tensile tests and the quasi-static and cyclic three-point bending tests. The composite panels were made by hand laying with subsequent vacuuming. The plates were stayed in a compression press and left in a compressed state for a month. After 5 months the samples were made from the plates and subjected to tests. The material behaves as linear almost to the failure, which occurred at tensions of about 100 MPa. The elastic modulus is between 6000 and 7000 MPa.
Modeling and Calculating Vibration Characteristic of Car Body Assembled and Manufactured in Vietnam
Authors: Nguyen Thanh Cong
Published: March 2019

In recently years, Automotive industry in Vietnam is a fast growing sector, mainly reliant on domestic produces, assembly and sales. There are some details of cars that have been modeled, calculated to research and fabricate. Body vibration of the vehicles is one of the criteria to evaluate quality in the process of manufacturing and assembling automobiles. There are so many factors affecting on vibration of vehicles, in that body structure is one of the main causes. Up to now, automobiles manufactured and assembled in Vietnam have not yet had specific evaluations and standards on vibration. Determination of characteristic body vibration is a main part to reduce sound and vibration. In this paper, the modelling and calculating the body’s characteristic vibration of cars manufactured, assembled in Vietnam was researched. The body structure is designed by 3D model using commercial Catia Software. The model was transformed from Catia software to Hypermesh software, using finite element method to simulate. The calculation results of 25 measurement characteristic vibrations whose frequency is in range of 22.77 Hz to 97.21 Hz. The results are shown that, characteristic vibration of state 1 and 2 significantly influence the noise of the body. This is also the basis for optimal analysis of the body structure to control the vibration and noise of automobiles.
First Experiences with Microsoft Kinect V2 for 3D Modelling of Mechanical Parts
Authors: Banh Tien Long , Bui Van Bien
Published: March 2019

Most of types of laser distance measuring instrument cost hundreds of thousand dollars such as Atos scanner or Depth Camera that gives depth maps of space very fast. However, the handling is too complicated for non-professional users and the utilization of 3D reconstruction is very limited. This paper introduces a workflow of 3D reconstruction using a new cheaper instrument, the Microsoft Kinect. The first experiences with Microsoft Kinect v2 sensor are presented, and the ability of 3D modelling for mechanical parts is investigated. For this purpose, the point cloud on output data as well as a calibration approach are demonstrated.
Vibration Analyses of a Tapered Composite Thin-Wall Box Beam with Rectangular Section
Authors: Binh Bui Van , Hien Le Thuong
Published: March 2019

This paper presented vibration analyses of a tapered composite thin-wall box beam with rectangular section. In the numerical results, the effects of taper angle on natural frequencies and the corresponding mode shapes, transient responses of the beam were considered. The algorithm and Matlab code using nine nodded rectangular isoparametric plate element with five degree of freedom per node developed to solve the problems.
Effects of Capacitor on the Hybrid Ignition System
Authors: Am Do Quoc , Dung Do Van , Ngoc Nguyen Tan
Published: March 2019

This paper analyzed how capacitor has an effect on the hybrid ignition system; especially the accumulated energy. Matlab was used to simulate the primary current, self – induced emf, oscillation frequency and accumulated energy. The experiment data - primary current, self-induced emf, oscillation frequency and dwell time - was collected via PicoScope 4425 Automotive Oscilloscope. Simulation results show that the accumulated energy in capacitors is greater than the required ignition energy, which ensure hybrid system working fluently.
Experimental Research on the Effect of Wing Structure on Aeroelasticity Phenomenon
Authors: Tran Ngoc Khanh , Dang Duc Chinh , Dao Duong Hai , Nguyen Phu Khanh , Hoang Thi Kim Dung
Published: March 2019

Aeroelasticity on airplane wing has a significant impact on the efficiency and the safety of a flight. Therefore, the study of aeroelasticity problems is a great attention in wing design process. To analyze this, three primary subjects of aeroelastic phenomena that the examination has to focus on, which are wingtip oscillation amplitude, flutter frequency and critical flutter velocity of the wing. [1] As these subjects are highly dependent on structures and materials of the wings, therefore, the aim of this paper is to introduce a structural calculation which is the combination of three experimental models and the infinite element method. Supercritical is chosen as the sample airfoils of the simulation. The model wings are made from different materials and size in order to create varied wing structures, thereby a comprehensive analysis is accomplished and the flutter velocity is also restricted to appropriate values within the working range of experiment devices. Simultaneously, Infinite element method using ANSYS software to simulate the phenomena on the same model wings is also conducted as a verification for the precision of the experimental models. In conclusion, obtained results from the structural calculation have a high applicability in the preliminary design stage of airplane wings, by making comparisons between two or more chosen airfoils to conclude which is the better one in term of wing sustainability and aeroelasticity resistance.
A Research on Locating AGV via RSS Signals
Authors: Nguyen Duy Anh , Huynh Minh Khoi
Published: March 2019

We are now living in an era of advanced technology, where every part of daily life is related to each other via many kinds of wireless connection. The fourth industrial revolution is now heading toward many kinds of network connecting in real-time which can boost productivity and performance among many manufacturers. In particular, a production manager wanted to know how many automated guided vehicles (AGV) were deployed in a warehouse at that moment; modern farmers wanted to know how many harvesting robots were operating, etc. Therefore, navigating is one of the main elements to handle these tasks. Although we have already applied Global Positioning System (GPS) to the outdoors so far, they still had some limitations, especially on deploying between indoor like houses, buildings which GPS signals are unable to reach. In this paper, we proposed a technique in order to recognize AGV and the distance between them via Received Signal Strength Indicator (RSSI) technique. In addition, we developed a way to store these data on a server for last long usage.