George Vlontzos, Leonidas Sotirios Kyrgiakos, Marie-Noëlle Duquenne,
In this research, the attitude of European young adults (age 18 to 30 years) regarding their consumption of local and traditional products was examined. The survey was conducted on a sample of 836 consumers from seven European countries (Greece, Bulgaria, Romania, Slovenia, Croatia, Denmark and France). Data collection was made by distributing a developed questionnaire through social media and university mail services. Principal Component Analysis (PCA) was used to identify consumer perception comparing ...
Tópico(s): Consumer Packaging Perceptions and Trends
2018 - Multidisciplinary Digital Publishing Institute | Foods
Marios Vasileiou, Leonidas Sotirios Kyrgiakos, Christina Kleisiari, Georgios Kleftodimos, George Vlontzos, Hatem Belhouchette, Pãnos M. Pardalos,
In the face of increasing agricultural demands and environmental concerns, the effective management of weeds presents a pressing challenge in modern agriculture. Weeds not only compete with crops for resources but also pose threats to food safety and agricultural sustainability through the indiscriminate use of herbicides, which can lead to environmental contamination and herbicide-resistant weed populations. Artificial Intelligence (AI) has ushered in a paradigm shift in agriculture, particularly ...
Tópico(s): Plant Disease Management Techniques
2023 - Elsevier BV | Crop Protection
Leonidas Sotirios Kyrgiakos, Georgios Kleftodimos, George Vlontzos, Pãnos M. Pardalos,
Abstract Safeguarding natural resources and energy is essential to ensure food security for future generations. Given the increase of published papers in the agricultural field applying Data Envelopment Analysis (DEA), this review seeks to address the special requirements of this methodology when implemented in the agricultural sector as well as to classify papers under sustainability aspects (economic, environmental, social). More specifically, 120 papers from Scopus and Web of Science databases ...
Tópico(s): Agricultural Innovations and Practices
2023 - Springer Science+Business Media | Operational Research
Marios Dominikos Kremantzis, Patrick Beullens, Leonidas Sotirios Kyrgiakos, Jonathan H. Klein,
Many organisations are composed of multiple departments connected either in series or in parallel, which may be further decomposed into a number of functions arranged in a hierarchical structure. Several researchers have successfully used appropriate Data Envelopment Analysis (DEA) modelling techniques to assess complex structures. However, to our knowledge, no-one has yet examined the case of measuring and evaluating a parallel network structure combined with a hierarchical one. This paper discusses ...
Tópico(s): Multi-Criteria Decision Making
2022 - Elsevier BV | Socio-Economic Planning Sciences
Leonidas Sotirios Kyrgiakos, George Vlontzos, Pãnos M. Pardalos,
Providing food security while preserving natural resources and reducing the use of production factors (land, labor, and capital), is a critical challenge for EU agricultural sectors in the 21st century. Sustainable Development goals adoption has increased the need for eliminating Greenhouse gas emissions across all EU sectors, while production should remain stable or even increase. For this purpose, Window Data Envelopment Analysis (DEA) has been selected as a benchmarking technique, in order to assess ...
Tópico(s): Sustainable Agricultural Systems Analysis
2021 - Multidisciplinary Digital Publishing Institute | Energies
Siwei Xiao, Marios Dominikos Kremantzis, Leonidas Sotirios Kyrgiakos, George Vlontzos, Pãnos M. Pardalos,
Abstract Several scholars have utilized hierarchical network Data Envelopment Analysis modeling techniques to assess the performance of complex structures. However, there has been limited consideration given to the integration of a peer-appraisal setting within a self-evaluation hierarchical context. This aims to enhance discriminatory power and mitigate the issue of unrealistic weighting scheme. To this end, our study extends the single-stage hierarchical additive self-evaluation model of Kao (Omega ...
Tópico(s): Multi-Criteria Decision Making
2023 - Springer Science+Business Media | Operational Research
Georgios Kleftodimos, Leonidas Sotirios Kyrgiakos, Christina Kleisiari, Aristotelis C. Tagarakis, Dionysis Bochtis,
Nowadays, the sustainability of Greek dairy cattle farms is questionable due to low competitiveness and high GHG emissions. In this context, the BIOCIRCULAR project, funded by the EYDE ETAK, developed a series of alternative practices focusing on precision agriculture principles. However, the adoption of any practice from farmers is not a given, and depends on several determinants. Hence, the objective of this study is to examine farmers’ adoption decisions regarding precision-agricultural practices ...
Tópico(s): Animal Behavior and Welfare Studies
2021 - Multidisciplinary Digital Publishing Institute | Sustainability
George Vlontzos, Spyros Niavis, Christina Kleisiari, Leonidas Sotirios Kyrgiakos, Christos G. Athanassiou, Pãnos M. Pardalos,
This paper seeks to underline the driving factors of farmers’ engagement in Participatory Research Projects (PRPs). This is a critical issue for formulating efficient and effective technology transfer channels, essential for improving the operational status of agricultural holdings. A survey was conducted on a sample of 326 Greek arable crops farmers. An explanatory framework consisting of three major factor categories and 11 variables was developed. A logistic regression analysis empirically tests ...
Tópico(s): Animal Disease Management and Epidemiology
2020 - Multidisciplinary Digital Publishing Institute | Applied Sciences
Jean-Samuel Leuba, Robert E. Fox, Juan de Dios Crespo Pérez, Gerardo Luis Acosta Perez, Frans M. de Weger,
... October 2006 in the case Panathinaikos FC versus Sotirios Kyrgiakos (hereinafter: the “award”) was noteworthy because it accepted ...
Tópico(s): Law, logistics, and international trade
2011 - | ASSER international sports law series
Spyros Niavis, Leonidas Sotirios Kyrgiakos, Christina Kleisiari, George Vlontzos,
The present paper develops a framework for modeling and explaining the decisions of farmers for realizing investments aimed at improving the operation of their holdings. The empirical analysis is conducted in Greece on 777 farmers of arable and orchard crops. The results prioritize the significance of farmers’ research engagement and information collection and show that there is a systematic difference between the realized investments between arable crops and orchard farmers, as the latter seem ...
Tópico(s): Agricultural Innovations and Practices
2020 - CentMa (Germany) | International journal on food system dynamics
Leonidas Sotirios Kyrgiakos, Christina Kleisiari, Spyros Niavis,
Recently, there is a strong support of European Commission for the empowerment of high protein crops cultivation in Europe. The shift to a more high-protein inclusive sector is not free of challenges and constraints. Towards this objective, a strategic approach is essential. Responding to this need, the present paper builds on the existing knowledge produced by both field and macro-oriented studies and develops a framework for assessing the potential of high protein crops development. Emphasis is ...
Tópico(s): Genetic and Environmental Crop Studies
2020 - | International Journal of Sustainable Agricultural Management and Informatics
Spyros Niavis, Leonidas Sotirios Kyrgiakos, Christina Kleisiari,
Recently, there is a strong support of European Commission for the empowerment of high protein crops cultivation in Europe. The shift to a more high-protein inclusive sector is not free of challenges and constraints. Towards this objective, a strategic approach is essential. Responding to this need, the present paper builds on the existing knowledge produced by both field and macro-oriented studies and develops a framework for assessing the potential of high protein crops development. Emphasis is ...
Tópico(s): Genetic and Environmental Crop Studies
2020 - | International Journal of Sustainable Agricultural Management and Informatics
Marios Vasileiou, Leonidas Sotirios Kyrgiakos, Christina Kleisiari, Paolo Prosperi, Georgios Kleftodimos, Athanasios Ragkos, Christos Tsinopoulos, Elie Abou Nader, Christina Moulogianni, George Vlontzos,
Abstract Within food Supply Chains (SCs), food products labeled through Geographical Indications (GIs) hold paramount importance as distinctive and culturally significant entities, ensuring the integrity and distinctiveness of regional specialties. By strictly regulating the geographic origin and production methods, the Protected Designation of Origin (PDO) not only guarantees the preservation of traditional practices but also safeguards the cultural legacy and identity of the regions where genuine ...
Tópico(s): Supply Chain Resilience and Risk Management
2024 - Wiley | Advanced Sustainable Systems
Siwei Xiao, Marios Dominikos Kremantzis, Leonidas Sotirios Kyrgiakos, Aniekan Essien, George Vlontzos,
Tópico(s): Spatial and Panel Data Analysis
2024 - Elsevier BV | Socio-Economic Planning Sciences
Georgios Kleftodimos, Leonidas Sotirios Kyrgiakos, Stelios Kartakis, Christina Kleisiari, Marios Vasileiou, Marios Dominikos Kremantzis, George Vlontzos,
Tópico(s): Agricultural Innovations and Practices
2024 - Springer Science+Business Media | Precision Agriculture
Aybike Bayraktar, Georgios Kleftodimos, Leonidas Sotirios Kyrgiakos, Christina Kleisiari, George Vlontzos, Hatem Belhouchette,
Tópico(s): Sustainability in Higher Education
2024 - Springer Science+Business Media | Journal of Environmental Studies and Sciences
Stelios Kartakis, Leonidas Sotirios Kyrgiakos, Christina Kleisiari, Georgios Kleftodimos, George Vlontzos,
Although the agricultural sector faces a number of challenges stemming from climate change, the adoption of precision agriculture practices appears to be able to mitigate its negative effects. The aim of this study was to assess farmers’ adoption decision process towards proposed precision agricultural practices in potato production systems in Northern Greece. In order to do so, a bio-economic model based on mathematical programming methods was developed and applied to three representative farms ...
Tópico(s): Land Use and Ecosystem Services
2023 - Springer Science+Business Media | Precision Agriculture
Leonidas Sotirios Kyrgiakos, Georgios Kleftodimos, Kremantzis M.D. Marios, Vlontzos G. George, Pãnos M. Pardalos,
Tópico(s): Agricultural Innovations and Practices
2023 - CentMa (Germany) | International journal on food system dynamics
Elie Abou Nader, Georgios Kleftodimos, Leonidas Sotirios Kyrgiakos, Christina Kleisiari, Nicola Gallai, Salem Darwich, Tristan Berchoux, George Vlontzos, Hatem Belhouchette,
The kiwi is a highly insect-pollinated dependent crop and is the cornerstone of the Greek agricultural sector, rendering the country as the fourth biggest kiwi producer worldwide, with an expected increase in national production the following years. This extensive transformation of the Greek arable land to Kiwi monocultures in combination with a worldwide shortage of pollination services due to the wild pollinators' decline raises questions for the provision of pollination services, and consequently, ...
Tópico(s): Insect and Pesticide Research
2023 - Multidisciplinary Digital Publishing Institute | Animals
Leonidas Sotirios Kyrgiakos, George Vlontzos, Pãnos M. Pardalos,
Tópico(s): Efficiency Analysis Using DEA
2021 - | International Journal of Sustainable Agricultural Management and Informatics
Pãnos M. Pardalos, George Vlontzos, Leonidas Sotirios Kyrgiakos,
Tópico(s): Global Trade and Competitiveness
2021 - | International Journal of Sustainable Agricultural Management and Informatics
Christina Kleisiari, Leonidas Sotirios Kyrgiakos, Spyros Niavis, Evangelia Tigka, Christina Moulogianni, Marie-Noëlle Duquenne, George Vlontzos,
The scope of this study is to clarify the main factors affecting the consumption of foodstuff derived from animal products. For this, we applied a modified version of the health belief model (HBM); trying to quantify the differences on the impact of two food groups on human health. Principal component analysis was applied to highlight essential components influencing participants to consume locally produced animal products. Based on the 'consumers' perceptions, there is a general positive attitude ...
Tópico(s): Culinary Culture and Tourism
2022 - Inderscience Publishers | International Journal of Agricultural Resources Governance and Ecology
George Vlontzos, Marie-Noëlle Duquenne, Christina Moulogianni, Evangelia Tigka, Spyros Niavis, Leonidas Sotirios Kyrgiakos, Christina Kleisiari,
Tópico(s): Culinary Culture and Tourism
2022 - Inderscience Publishers | International Journal of Agricultural Resources Governance and Ecology
Shiping Mao, Marios Dominikos Kremantzis, Leonidas Sotirios Kyrgiakos, George Vlontzos,
Nowadays, China’s food consumption structure is shifting from being survival-oriented to health-oriented. However, the food industry is still facing a research and development (R&D) dilemma. Scientific evaluation of an enterprise’s R&D performance can help to reduce the investment risk of R&D and promote economic benefits. This study implements the dynamic data envelopment analysis (DDEA) technique to measure and evaluate the level of R&D performance in the Chinese food manufacturing ...
Tópico(s): Energy, Environment, Economic Growth
2022 - Multidisciplinary Digital Publishing Institute | Agriculture