Razvan Daniel Zota

• PhD
• Professor at Bucharest University of Economic Studies

The increasing complexity of IT operations necessitates advanced automation to ensure system availability, resilience, continuity, performance, security, and maintainability. Traditional IT management frameworks, such as the Information Technology Infrastructure Library (ITIL), have standardized service management processes, while models like IBM’s...

Sustainable development, smart waste management, and circular economy principles are paramount to the significant worldwide trend of smart city-related research and projects. The basic hypothesis of our research is that artificial intelligence (AI)-based IT applications have an increasingly important role in the field of smart cities in terms of is...

When we speak of solutions that can be designed, developed, and implemented to solve a determined problem in a specific domain, human intelligence shows that it cannot be kept within regular bounds. In addition, it consistently manages to produce innovative elements that increase efficiency, applicability, and abstraction, with the drawback of incr...

The fact that advanced technologies and their economic applications have generated increasing resource costs justifies the transition from a linear approach to a circular one in order to control these costs. From this perspective, this study presents how artificial intelligence can help achieve this goal. Therefore, at the beginning of this article...

Cities have grown in development and sophistication throughout human history. Smart cities are the current incarnation of this process, with increased complexity and social importance. This complexity has come to involve significant digital components and has thus come to raise the associated cybersecurity concerns. Major security relevant events c...

Human intelligence has no limits and constantly impresses with innovative solutions that increase in complexity, applicability, and efficiency. With the advancement of technology and the passage of time, there was a need to move from the linear economic model, which involved the implementation of the “takemake- waste” process and which causes negat...

Modern browsers are very complex pieces of software, having capabilities, and functionalities that have been compared to those of the operating systems. Although not quite the same, browsers do pack a lot of processing power and enough versatility to dictate a big part of our everyday internet-related activities by providing optimization and robust...

An increase in popularity and adoption of IoT products encountered a direct proportionate interest in attacks and exploits on such solutions, having a measurable economic impact on the business industry and the IoT customers. The research analysis conducted on various IoT devices revealed security issues with patterns that are strongly related to h...

This article starts from an analysis in the scientific literature of sustainable university and of smart university particularities in relation with sustainability, our main purpose being to identify whether Smart technologies are vital for the sustainable development of universities. By using a quantitative research, online questionnaire based, we...

The proposed goals of smart cities are to improve the quality the life of citizens by improving urban infrastructure, foster innovation and enhance the healthcare system offered to their citizens. This paper presents a literature review about the use of Big Data Analytics and BDA-related technologies in order to provide highly efficient medical and...

The proposed goals of smart cities are to improve the quality the life of citizens by improving urban infrastructure, foster innovation and enhance the healthcare system offered to their citizens. This paper presents a literature review about the use of Big Data Analytics and BDA-related technologies in order to provide highly efficient medical and...

The most important aspect of handling data in the healthcare industry is its seamless and secure transition across intercepting nodes. Effective elimination of third-party entities and ensuring direct links between patient and healthcare provider can result in the transmission of error-free, unduplicated data. The use of blockchains can open up opp...

The most important aspect of handling data in the healthcare industry is its seamless and secure transition across intercepting nodes. Effective elimination of third-party entities and ensuring direct links between patient and healthcare provider can result in the transmission of error-free, unduplicated data. The use of blockchains can open up opp...

With the rapid increase in technology, the healthcare sector is approaching towards digital solutions for clinical evidence related to various diseases. This research paper provides a theoretical framework for a Clinical Decision Support System with the help of Software as Medical Device regime (CDS-SaMD). The proposed software model comprises laye...

The Game Theory model provides revolutionary grounds for tackling problems in an optimal manner by considering various constraints and conditions. This research paper proposes a novel idea of monitoring, diagnosis and treatment of hypertension using game theory model using systematic review methodology. The theoretical framework for designing softw...

The increase of urban population raises high challenges to city management policies because of agglomeration, pollution, heritage endangerment and overall welfare of inhabitants. In the same time, urban population is more educated and more prone to using and responding to new technologies; hence Smart solutions may be prove to be efficient means of...

The starting point of our research was to propose a new approach in smart applications for patients’ remote monitoring model comprising blood pressure and heart rate measurement. We propose a different perspective in this area since a possible usage of R, Julia, or Python hasn’t been considered in remote monitoring of patients in personalized medic...

Kullback-Leibler Divergence Class or relative entropy is a special case of broader divergence. It represents a calculation of how one probability distribution diverges from another one, expected probability distribution. Kullback-Leibler divergence has a lot of real-time applications. Even though there is a good progress in the field of medicine, t...

The 13th International Conference on Business Excellence Sustainable Business Models and Innovation in the Knowledge Economy 21-22 March 2019, Bucharest, Romania

One of the most commonly known vulnerabilities that can affect a binary executable is the stack-based buffer overflow. The buffer overflow occurs when a program, while writing data to a buffer, overruns the buffer’s boundary and overwrites adjacent memory locations. Nowadays, due to multiple protection mechanisms enforced by the operating system an...

The most important aspect of handling data in the healthcare industry is its seamless and secure transition across intercepting nodes. Effective elimination of third-party entities and ensuring direct links between patient and healthcare provider can result in the transmission of error-free, unduplicated data. The use of blockchains can open up opp...

This paper provides an in-depth analysis of the Big Data application in the field of medicine. This innovative technology is a significant topic because Big Data introduces new opportunities for medical practitioners and patients, including the improvement of patients’ quality of life and healthcare systems, the mitigation of specific illnesses, an...

Abstract Kullback-Leibler divergence class or relative entropy is an exceptional instance of a more extensive divergence. It is an estimation of how a particular dissemination wanders from another, normal likelihood appropriation. Kullback-Leibler divergence has a considerable measure of ongoing applications. Despite the fact that there is an advan...

The National Health Insurance House (NHIH) is one of the authorities in charge of overseeing the quality of healthcare. In order to carry out its duties, the authority needs to obtain and process data from distinct data points and channels, an endeavor which can be efficiently achieved using information systems and technologies. One of the channels...

While a myriad of tools and techniques exist for predicting a patient's health, they fail to attain the level of sophistication associated with the human body. Consequently, various health studies have incorporated technology, such as artificial intelligence (AI), into healthcare in a bid to predict increased blood pressure in patients. This paper...

Sales forecasting plays an important role in business strategy. An appropriate demand forecasting model is necessary for reducing the cost of storage. At a company level, lowering the warehouse costs and optimizing the value chain is a prominent requirement for an optimum stock management. In this paper a demand forecasting model is built to suppor...

Inventory management involves determining optimum inventory stock that should be held. It is necessary to introduce a set of policies and controls that establish and track levels of inventory and determine when stock should be refilled. At a firm level, identifying all opportunities for optimizing the value chain and lowering the warehouse cost is...

In the present time, when companies’ businesses are growing more and more, the software developers may adapt to a change from the industry direction and must continuously analyze and optimize current solutions. By developing new strategies to automate services, the architects and developers contribute to more flexible and efficient solutions that p...

Although less known outside strictly specialized environments, Business Support Systems (BSS) are highly complex and the subject of their installation in cloud implementations is less addressed. This paper presents a short history of BSS evolution, starting from basic voice and messaging services and ending up to 4G and M2M services, presenting new...

Migrating data in Business Support Systems is never an easy job even when changing only one component. Migrating to a cloud solution that has limited flexibility in data structure needs more than a simple data migration approach. Multiplying that several fold, since each customer has its own data source, it requires an automated data recognition an...

In this paper we have presented the main characteristics of the most important reference archi-tectures designed for the cloud computing environment. Specifically, we have introduced the proposed architectures of the worldwide cloud computing companies like Cisco, IBM and VMware and we also had a look at the National Institute of Standards and Tech...

Cloud enterprise architectures (CEA) meet all the business needs of an enterprise architecture. The architect's dilemma represents the decision what fits where. As a conclusion to previous research we decided to fit CEA into the enterprise architectures of organizations. Considering this approach, architectures developed can be abstracted enough to...

Retelele de calculatoare sunt astazi omniprezente, indiferent de domeniu sau de locul in care ne aflam. Internetul a devenit in ultimii ani o resursa aproape indispensabila pentru orice familie care, pe langa conectarea la reteaua electrica sau la cea de gaze, este conectata si la reteaua Internet. Cartea Retele de calculatoare, structurata in 7 c...

The Internet banking today is not something new anymore; all the banks in the Romanian market (and not only) are offering different forms of Internet banking which is ultimately a service in the cloud. In terms of cloud computing, Internet banking represents SaaS for the users, an application which uses Internet for making payments, viewing informa...

Cloud computing represents one of the latest emerging trends in distributed computing that enables the existence of hardware infrastructure and software applications as services. The present paper offers a general approach to the cloud computing standardization as a mean of improving the speed of adoption for the cloud technologies. Moreover, this...

The domain of cloud computing involves several complex issues. An interesting topic in the cloud computing are represents the application of standardization by using business application frameworks. The current paper analyses some of the existing architecture and governance frameworks and their usability from a cloud implementation perspective, in...

Year 2012 celebrates the 25th anniversary of Enterprise Architecture (EA) field, since in 1987 J.A. Zachman wrote an article entitled “A Framework for Information System Architecture” [10] which emphasized the role of a disciplined approach to the management of the information systems in order to achieve the success of a business. Due to capacity a...

For knowledge management to be successful, the corporate culture needs to be adapted to encourage the creation, sharing, and distribution of knowledge within the organization. There exist different historical and theoretical approaches to and theories about organizing knowledge, which are related to different views of knowledge, cognition, language...

As the European Service Directive has already been enforced, a new challenge is to ensure a fully interoperable e-Government environment at the European level. The new dimension of the public administration process raises several issues that have to be addressed in order to successfully integrate systems from various administrative models. The curr...

Role engineering is a both necessary and critical topic in the development of Role Based Access Control system, which seems to be the most proficient approach nowadays. Despite the maturity of the RBAC model, the role engineering process is not a standardized approach. The paper aims to illustrate an enhanced process model for role engineering. The...

In response to the significant changes in the competitive climate of public sector higher education institutions (HEIs), the Romanian universities face the need to improve operational efficiency by implementing advanced information systems. The purpose of this paper is to provide a solution for an information system that could integrate all of a Ro...

In response to the significant changes in the competitive climate of public sector higher education institutions (HEIs), the Romanian universities face the need to improve operational efficiency by implementing advanced information systems. The purpose of this paper is to provide a solution for an ERP (Enterprise Resource Planning) system that coul...

We present in this paper some of the various usages of wireless technology, through web services and WAP. The importance of this paper is emphasized by the permanent interest of web developers to add WAP functionality and support to their web sites. As for the practical part of the paper, we provide here two applications, both developed for the ac...

Computers are an integral part of the economic, social, professional and governmental infrastructures. They have become necessities in virtually every area of modern life, but their vulnerabilities are of increasing concern. Computer-based systems are constantly under threats of inadvertent errors and acts of nature, as well as those attributable t...

Nowadays the business medium requires anytime and anywhere connectivity. In an increasingly competitive business environment, more and more organizations need fast responses and instant results. Therefore, mobility changes the way companies do business; instant messaging, voice services, real-time LAN access, network access while traveling are tran...

This paper presents an e-Government Framework that allows cooperation among applications belonging to different Government Agencies in order to supply new added value services (event of life services) tailored to citizens and business needs. Moreover, it promotes an internal process reengineering made by integrating governmental legacy applications...

Broadband wireless access is one of the segments in telecoms industry that is attracting growing interest, representing the technology of choice for an increasingly large number of operators in both new and developed markets. The broad-based acceptance of this technology is due to huge benefits it offers in terms of fast, easy and cost effective de...

Applications likes spatial databases systems, CAD, GIS, robotics have to be ableto manage large volumes of data and require for access methods to perform spatial queriesin reasonable time. The most used access method for spatial data is the R-tree or one ofits multiple versions. In this paper we present the main characteristics of R-trees and R*-tr...

Nowadays, information and communication technologies are incorporating extremely rapidly to the individual's education and training. This trend lead the European academic research to focus on key terms like open distance learning or lifelong learning. In this context, there are a large number of past and actual projects and researches concerning th...

Parallel implementation of the dense linear algebra operations is a well understood process but the availability of high performance, general purpose parallel dense linear algebra libraries is limited by the complexity of implementation. This paper describe PLSS - (Parallel Linear System Solver) - a library which provides routines for linear system...

In the new Information Society of this new millennium the use of Information and Communication Technology (ICT) is essential for the individual’s education and training. A major buzzword nowadays, e-business represents the new trend of the business. In order to become or to remain competitive as a business in the industry or in another field of act...

In the new Information Society of this new millennium, the use of Information and Communication Technology (ICT) is essential for the individual's education and training. A major buzzword nowadays, e-business represents the new trend of the business. In order to become or to remain competitive as a business in the industry or in another field of ac...

Romania is facing major challenges in the public administration field as a new member of the European Union. It has become a mandatory requirement to adhere to the European dimension of the public administration reform process. In this paper, we are going to discuss how the European Union Services Directive has influenced the reform process, as eff...