Constantinos Halkiopoulos | University of Patras (original) (raw)

Papers by Constantinos Halkiopoulos

Immunization appears to be an essential part of health care service in times of pandemics such as... more Immunization appears to be an essential part of health care service in times of pandemics such as covid-19 and aims not only to protect the health of population but also the health and sustainability of the economies of the countries affected. It is reported that more than 3.44 billion doses have been administered so far, which accounts for 45 doses for 100 people. Vaccination programs in various countries have been promoted and accepted by people differently and therefore they proceeded in different ways and speed; most countries directing them towards people with vulnerable chronic or recent health statuses. Large scale restriction measures or lockdown, personal protection measures such as masks and gloves and decrease in leisure and sports activities were also implemented around the world as part of the protection health strategies against the covid-19 pandemic. This research aims to present an analysis based on variations on people's attitudes towards vaccination based on de...

Emerging Science Journal

Objectives: This paper addresses the problem of secure data storage and sharing over cloud storag... more Objectives: This paper addresses the problem of secure data storage and sharing over cloud storage infrastructures. A secure, distributed cloud storage structure incorporating the blockchain structure is proposed that supports confidentiality, integrity, and availability. Methods/Analysis: The proposed structure combines two well-known technologies: one of them is the Ethereum Blockchain and its Smart Contracts and the other is the RSA encryption and authentication scheme. The Ethereum Blockchain is used as a data structure, which ensures data availability and integrity while RSA provides sensitive data confidentiality and source authentication. Findings: As a result, users of the proposed structure can trust it and be certain that they can securely exchange information through a publicly accessible and shared cloud storage. The application can be used either through a user interface (UI) or a command-line interface (CLI). Novelty /Improvement:The novelty of this work is that the sy...

The Stroop test is a neuropsychological test that is internationally considered as reliable and s... more The Stroop test is a neuropsychological test that is internationally considered as reliable and sensitive for the control of frontal activity and executive function. In this research work, the Stroop test was carried out by using the Unity machine in a virtual test with exactly the same application methodology and measurement of the results. The new visual "ustroop" test was administered to a sufficient number of individuals in order to weigh the score relative to the initial test. Subsequently, additional games scenario in the form of a play script were added using well-known large company logos to observe the player's reaction to color, brand name and words. Then the collected data are analyzed and transformed to assume suitable form for the execution of the respective machine-learning algorithms, provided by the software package Weka, in order to evaluate the brand name and its relation to the color in the context of Marketing. In conclusion, visual gaming...

5th International Conference on Contemporary Marketing Issues (ICCMI), 2017

The present study aims to investigate personality traits and emotional intelligence in young adul... more The present study aims to investigate personality traits and emotional intelligence in young adults' consumers who use social networks to make shopping. Consumer behavior has long been of interest to researchers. Contemporary research on Consumer Behavior considers a wide range of factors influencing the consumer, and acknowledges a broad range of consumption activities beyond purchasing. Νowadays, since online purchases is a daily practice, it is useful to study the behavior of online consumers who are social network users and make shopping via social media. Two basic components that influence consumer behavior are personality and emotional intelligence. Emotional intelligence is both characteristic of personality and intellectual capacity, which a person inherits from the genetic material of its parents and evolves-develops throughout lifetime. Personality' refers to the pattern of thoughts, feelings and behavior that makes each individual separate from others. These affect the way of think, feeling and behaving towards itself and others.

Background/Objectives: Accurate prediction of stock prices is an extremely challenging task becau... more Background/Objectives: Accurate prediction of stock prices is an extremely challenging task because of factors such as political conditions, global economy, unexpected events, market anomalies, and relevant companies' features. In this work, the random forest has been used to forecast the prices of the four major Greek systemic banks Methods/Analysis: We make use of a set of financial variables based on intraday data: (i) Open stock price, (ii) High stock price, (iii) Low stock price, and (iv) Close stock price of a particular Greek systemic bank. Results/Findings: The variables used here are crucial in predicting systemic banks' stock closing prices. These provide a better prediction of the next day's closing price of the bank series. Novelty /Improvement: To our knowledge, this is the first study that employs machine learning techniques in Greek systemic banks.

Despite the importance of emotion in decision making (e.g., ohm and Clore 2002; Luce 1998; Pham 1... more Despite the importance of emotion in decision making (e.g., ohm and Clore 2002; Luce 1998; Pham 1998; Ruth 2001), research has yet to fully understand how consumers' use emotional information to make effective decisions. A growing body of research continues to focus on the emotions present in consumption situations, however a better understanding of emotional processing abilities can have important effects on consumer performance outcomes. The current research focuses on the impact of emotional intelligence onconsumer decision making and evaluates the consumer emotional ability in a sample of social network users. Additionally, through the present project, empathy, personality and emotional intelligence are being measured as intrusive variables that mediate and determine the consumer decision making. The innovative element of the current project was the application of data mining methods in psychometrics. Specifically, in order to clarify the consumer emotional decisio...

Neuromarketing is growing rapidly in the market, influencing advertising, product design and deve... more Neuromarketing is growing rapidly in the market, influencing advertising, product design and development, and pricing, as well as enhancing communication between consumers and businesses more widely. In this research review, we examine the use of neuromarketing as an innovative method for achieving objective outcomes that indicate internal consumer behavior information. We'll cover cutting-edge neuromarketing techniques that enable businesses to examine the effects on consumer behavior, advertising, pricing, product distribution, and decision making. Neuromarketing utilizes neuroimaging technologies (fMRI, EEG, MEG, etc.) to control the activated areas of the brain and generates data that may appear to be inaccurate at first glance, raising doubts about their utility in marketing. However, upon closer examination, these data based on targeted studies demonstrate that they can unlock the consumer's hidden information and indirect correlations in order to evolve the consumer. ...

In this research paper presents the Evaluation of burnout Index professionals working in both the... more In this research paper presents the Evaluation of burnout Index professionals working in both the private and public sector, amid the economic recession in Greece. Data were collected by filling working adults aged 18 years and above through a questionnaire which is designed to measure burnout at work (Maslach Burnout Inventory - MBI). This questionnaire measures three dimensions of burnout: (1) Emotional Exhaustion, (2) Depersonalization, (3) Personal Accomplishment. The questionnaires were created through Google Forms service and posted on the website http://www.cicos.gr. Subsequently, selected data for analysis by adding additional parameters such as gender, age, education, occupation and birth / residence. Then an appropriate pretreatment provided as input to a special software and Machine Learning Data Mining (R) to generate patterns and inference rules. In conclusion, the results obtained by weighting and criteria basis, evaluate and present adult rates, which in turn analyze ...

Nowadays, tourism constitutes one of the most powerful tools for developing a country's econo... more Nowadays, tourism constitutes one of the most powerful tools for developing a country's economy. The tourism industry has already expanded to a large extent through marketing, in line with the technology of the 21st century. This has an impact on the economic growth of these countries as well as their emergence in leading travel destinations. The numerous innovations of multimedia technologies have now modernized the field of tourism promotion, such as Virtual Reality that has been adopted by many countries. Also, the use of Augmented Reality applications is considered as a key challenge for the future and sustainability of travel agencies. These technologies have a broad scope in the tourism-related fields of marketing, advertising, and cultural heritage promotion. This paper aims to investigate the benefits of state of the art technologies in tourism marketing, presented through an overview of scientific articles.

In this article a mathematical model is proposed, in an attempt to analyze the telecommunication ... more In this article a mathematical model is proposed, in an attempt to analyze the telecommunication sector in Greece. The model is based on the Lotka-Volterra equations and describes the market shares for the companies in the country's Telecommunication sector. Based on a data row for the market share of a specific time period, we define a model that well fits to the data set.

Having studied approximately 20,000 printed Greek advertisements covering the period from 1875 to... more Having studied approximately 20,000 printed Greek advertisements covering the period from 1875 to 2019, this article attempts to examine and describe the use of minors in them, depending on the type of product displayed, that is, the category to which this belongs. On the theoretical level, therefore, from the point of view of marketing science, the main concern of the study is to define the concept of "product category" and to examine it in conjunction with the consumer need or desire to meet and, in the same context, analyze and understand the "Product hypostases" on which the formation of his image is based on the public. The investigation of the large volume of empirical material resulted in 547 advertisements, in the visual part of which prominent minors. As we shall see, these ads are not evenly distributed across all product categories, which has caused the causal explanation of this inconsistency. In this sense, using the content analysis techni...

Recent advances in Internet Computer Technology (ICT) and the everincreasing use of technological... more Recent advances in Internet Computer Technology (ICT) and the everincreasing use of technological equipment amongst adolescents and young adults along with unattended access to the internet and social media and uncontrolled use of smart phones and PCs, has caused social problems like sexting to emerge. The main purpose of the present article is first to present an analytic theoretical framework of sexting as a recent social phenomenon based on studies that have been conducted the last decade or so; and second to investigate Greek students' and also social network users, sexting perceptions and to record how often social media users exchange sexual messages and to retrace demographic variables predictors. Data from 1,000 students were collected and analyzed and all statistical analysis was done by the software package WEKA. The results indicate among others, that the use of data mining methods is an important tool to draw conclusions which could affect decision and poli...

The purpose of this paper is to illuminate the perspective that tourists and particularly Greeks ... more The purpose of this paper is to illuminate the perspective that tourists and particularly Greeks demonstrate as far as their booking behavior concerned travel reviews during the period of economic recession. Especially online travel reviews written by consumers are ever more available and used to inform travel-related decisions. The present research concentrated on the web platforms of intermediary firms and agencies that constitute the etourism sector. These are organizations that facilitate communication and transactions between the primary providers of travel and accommodation services (e.g. airlines, hotels, car hire firms), and potential consumers of those services. Blogs, online reviews (ORs), and social networking platforms are enabling travelers to share information, opinions, and knowledge about all kinds of goods and services in e-Tourism. Specifically, online reviews (ORs) can be considered as electronic versions of traditional WOM (e-WOM) and consist of comments publishe...

International Journal of Learning, Teaching and Educational Research

The present study investigates the role of synchronous and asynchronous education techniques in t... more The present study investigates the role of synchronous and asynchronous education techniques in the context of digital and game-based learning materials through a collaborative study, conducted during the Covid-19 pandemic (October 2020 – June 2021), in an online e-learning environment. The study involved 35 last-year elementary school children, in Western Greece, with learning and behavioral issues. The children were given games with both practical and academic modules throughout their online schooling. For example, a math game was played over WebEx using Kahoot; a game for European institutions was created using the learningapps.org software; and online games from the European Union's "Learning Corner" as well as the game "Defeat the Virus" were used for the Social and Political Education topic. The findings are based on data collected through synchronous and asynchronous e-learning frameworks (WebEx, e-Class), and were linked to both cognitive learning asp...

Transcending Borders in Tourism Through Innovation and Cultural Heritage

Print advertisements are a good ground for studying phenomena of textual and visual diversity. As... more Print advertisements are a good ground for studying phenomena of textual and visual diversity. As a combination of text and image, the advertisements represent a large number of varieties of social and commercial reality through which they reproduce and reinforce specific ideologies and correspondingly imaginative ones. Advertising is a reason for the commodity society and the mass culture that it entails, and as such defines textual (linguistic) behavior in the sense that it aligns the projected with linguistic and visual homogeneity and consequently stereotypes resulting from this. The aim of this article is to record and visualize the textual and visual signs in the printed advertisements concerning the way of showing Greece as a tourist destination between 1920 and 2019. The theoretical framework of this reading is based on two theoretical frameworks: first, in polygraphism and secondly in that of destination marketing and place branding.Furthermore, the technical framework prov...

SSRN Electronic Journal, 2022

British Journal of Marketing Studies, 2020

Emotional intelligence is both characteristic of personality and intellectual capacity, which a p... more Emotional intelligence is both characteristic of personality and intellectual capacity, which a person inherits from the genetic material of its parents and evolves-develops throughout lifetime. It refers to information processing capacity arising from the emotions and their utility to guide action in situations that require activation of the cognitive system. The purpose of the present research work is the application of Machine Learning and Data Mining methods for the evaluation of emotional IQ in a sample of students and social network consumers (age 18-26 years). Understanding how users behave when they connect to social networking sites creates opportunities for better interface design, richer studies of social interactions, and improved design of content distribution systems. The data were collected by completion of the self-report questionnaire Trait Emotional Intelligence (TEIQue) and used for the application of data mining methods. Then the collected data were selected for analysis, with relevant transformations in order to have a suitable form for the implementation of the respective machine learning algorithms included in the software package R. Furthermore, the parameters of the corresponding set of algorithms were determined depending on the case of application to produce inference rules. Some of the algorithms implemented according to specific research questions that were applied, were the classification algorithms (ID3 and J48) for the production of decision trees, regarding the four more general factors (welfare, selfcontrol, emotionality and sociability) and in overall emotional intelligence. The results obtained, after weighing and criteria basis, present consumers' rates, which in turn analyze the degree of emotional intelligence.

Emerging Science Journal

5th International Conference on Contemporary Marketing Issues (ICCMI), 2017

International Journal of Learning, Teaching and Educational Research

Transcending Borders in Tourism Through Innovation and Cultural Heritage

SSRN Electronic Journal, 2022

British Journal of Marketing Studies, 2020

EXECUTIVE SUMMARY Autism spectrum disorder (ASD) involves difficulties in communication, relation... more EXECUTIVE SUMMARY Autism spectrum disorder (ASD) involves difficulties in communication, relationships, and social interactions. Social deficits, in conjunction with sensory issues, can provoke several difficulties regarding the capacity of a child to be engaged in a relationship. The present study is a case report that outlines the implementation of a sex educational program, aiming at increasing participant awareness and the ability to improve/establish relationships. Findings also revealed the need for early intervention on issues regarding sex education and the involvement of the family of children with ASD.