Efstathios Kaloudis

University of the Aegean

The origin of a product, consumer familiarity, and purchasing identity are factors that affect the perception of cheese consumption. The present study aims at identifying consumers’ conceptualizations and attitudes towards local Greek cheeses of the North-Aegean Sea islands, such as Ladotyri, Graviera, Kasseri, Kaskavali, Melichloro, and Kalathaki,...

The origin of a product, consumer familiarity, and purchasing identity are factors that affect perception of cheese consumption. The present study aims at identifying consumers’ conceptualizations and attitudes towards local Greek cheeses of the North-Aegean Sea islands, such as Ladotyri, Graviera, Kasseri, Kaskavali, Melichloro, and Kalathaki, som...

In consumer studies, particular emphasis has been given on investigating consumers' emotional response to foods. In recent years, the use of social media by consumers for personal expression has created the need to use these platforms as data sources. Natural language processing and sentiment analysis tools are also available, which can be combined...

Introduction Bulk railcars are a common method of moving commodities in the USA. Allowances are given for the practice of treating railcars with fumigates during transit because the routes are limited access and not on public roads. Recent technology has become available for monitoring phosphine gas (PH 3 ) fumigation on railcars which logs the pho...

BACKGROUND Data are provided on the utilization of modified atmospheres, at a commercial scale, against stored product insect populations that are resistant to phosphine. The method is evaluated on different populations of two major stored‐product beetle species, Rhyzopertha dominica and Oryzaephilus surinamensis. The trials were carried out in com...

In the present work, the distribution of phosphine gas in metal shipping containers was modeled and compared with available data from phosphine sensors. Two different sizes of containers, 20 and 40 ft, were used in the experiments with different doses for each treatment. In each container, sensors were placed to monitor the distribution of phosphin...

In this study, we evaluated wireless phosphine sensors to quantify and depict spatio-temporal dynamics and distribution of this gas within different types of facilities and commodities. The use of wireless sensors has certain advantages over the use of traditional monitoring techniques (e.g. tubes etc.), as any measurements with these traditional t...

In the present work, the distribution of phosphine gas in six metal silos with wheat was modeled and compared with available distribution data from wireless phosphine sensors. During the fumigation, a recirculation system was used to improve the diffusion of phosphine in the grain. Three different Scenarios of the recirculation system were used: a)...

Several application domains/sectors such as logistics, health-care, industry and transportation, are exploiting the added value of deployed sensors to obtain information relevant to the domain and exploit it in different contexts (e.g. for processes optimization, for actions adaptation, for decision support, etc.). The same applies to the agricultu...

In the present study, the distribution of phosphine gas in a cylindrical silo was modeled and compared with available sensor data. The cylindrical silo was filled with wheat and a recirculation system was used to enhance the diffusion of phosphine throughout the grain volume. A Computational Fluid Dynamics (CFD) model was developed with OpenFoam so...

This study investigates numerically, in terms of Computational Fluid Dynamics (CFD), a Parabolic Trough Collector (PTC) system with nanofluid as the Heat Transfer Fluid (HTF). All the heat transfer mechanisms were taken into account to simulate the SEGS LS2-module PTC. The validation process showed very good agreement between the numerical results...

This study uses Computational Fluid Dynamics (CFD) to investigate numerically the flow phenomena in the intrusion region of a thermal storage water tank during discharge. The early times of the discharging process have significant effect on the thermal mixing and the associated energy losses. A detailed time-evolution of the flow and temperature fi...

This study investigates air pollution dispersion in urban areas by means of Computational Fluid Dynamics (CFD). The commercial CFD software FLUENT was used to implement two different turbulence simulation methods (RANS and LES), in domains similar to complex urban environments. Particularly, different combinations of roof shapes were studied and si...

The present work investigates, by means of numerical simulations, conjugate heat transfer effects inside a computer chassis. The numerical simulations were conducted by the FLUENT commercial Computational Fluid Dynamics (CFD) software. The solution was obtained by solving the Navier-Stokes equations in a three dimensional computational domain. A va...

This study investigates numerically the flow phenomena developing in the discharging process of a rectangular water tank used for thermal energy storage and how these affect the thermal mixing and the associated energy losses. Four different scenarios are implemented for the discharging process, in the effort to cover situations typically encounter...

This study investigates numerically different scenarios for the charging process of a high capacity water tank used for thermal energy storage. In the design of such facilities it is important to be able to quantify the thermal losses that occur when water entering the tank mixes with the stored water which is at a different temperature (thus produ...

The purpose of this work is to present a comparison between two standardized test methods for the evaluation of the energy performance of Solar Domestic Hot Water (SDHW) systems. The approaches investigated concern the Dynamic method (DST) and the Input–Output method (CSTG). These methods have been officially established as ISO standards, thus they...