G.-Fivos SargentisNational Technical University of Athens | NTUA · School of Civil Engineering
G.-Fivos Sargentis
Dr Engineer-Sculptor
About
52
Publications
17,920
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
288
Citations
Citations since 2017
Introduction
Fivos Sargentis was born in Athens in 1972.
Studied Civil Engineering in National Technical University of Athens.
He worked and taught at National Technical University of Athens.
He got his first Ph.D. by the School of Architecture and his second Ph.D. by the School of Civil Engineering.
Member of: Technical Chamber of Greece (TEE-TCG), Chamber of Fine Arts of Greece.
He is married and he has two daughters.
Additional affiliations
November 2017 - present
April 2014 - November 2017
Position
- Teaching staff
Description
- Teaching at the School of Architecture "Materials of construction"
January 2002 - January 2012
Position
- Guest
Description
- Postgraduate program "Science and Technology of Water Resources"
Education
November 2017 - June 2022
National Technical University of Athens
Field of study
- Civil Engineering
January 2001 - September 2006
September 1991 - March 1998
Publications
Publications (52)
The water–energy–food (WEF) and land nexus is a basic element of prosperity. However, the elements of WEF are not equally distributed, and the dynamics of trading drives the distribution of goods. Money controls the trading, but money is just a convention and not a stable measure. Therefore, we have used the data of gross domestic product (GDP) and...
Social structure is based on the availability of the Water-Energy-Food Nexus. To cover these needs of society, several solutions of different scales of infrastructures coexist. The construction of infrastructure is capital-intensive; therefore, investment risk is always a consideration. In this paper, we try to evaluate the investment risk by inter...
Water has always been a driver of human civilization. The first human civilizations thrived in places with an abundance of water, typically nearby large rivers as the Tigris–Euphrates, Yang Che and Nile. The invention and construction of hydraulic infrastructure came only later, in prehistoric times, triggered by the expansion of humanity in water-...
![Figure 4. Prices of wheat (data from [82]) and oil (data from [83])...](profile/Demetris-Koutsoyiannis/publication/363578942/figure/fig2/AS:11431281084605701@1663264862297/Prices-of-wheat-data-from-82-and-oil-data-from-83-January-2010-June-2022_Q320.jpg)
![Figure 9. Daily energy and water consumption of mammals (data from [150]).](profile/Demetris-Koutsoyiannis/publication/363578942/figure/fig3/AS:11431281084605702@1663264862465/Daily-energy-and-water-consumption-of-mammals-data-from-150_Q320.jpg)
The formation of societies is based on the dynamics of spatial clustering, which optimizes economies of scale in the management of the water–energy–food (WEF) nexus. Energy and food are determinant measures of prosperity. Using the WEF nexus as an indicator, we evaluate the social impacts of the current (2022) conflict and in particular the economi...
Living organisms pass through life seeking prosperity in a materialistic world.
There are different meanings of prosperity. Some people think that it is measured in money, others relate it to pleasure and life satisfaction, while others link it to spirituality. However, it could be argued that the basic human needs related to the Water, Energy and...
Environmental determinism is often used to explain past social collapses and to predict the future of modern human societies. We assess the availability of natural resources and the resulting carrying capacity (a basic concept of environmental determinism) through a toy model based on Hurst–Kolmogorov dynamics. We also highlight the role of social...
The pursuit of wealth has been a basic occupation of humans; as it turns out, wealth increases life expectancy. Analyzing global data, we show that money, probably connected with medical care, increase life expectancy. However, the base of real wealth is access to the Water–Energy–Food nexus, and the access to this also increases life expectancy. T...
Landscape design of major civil infrastructure works has often been undermined as a policy requirement or been neglected in practice. We investigate whether this is justified by technical challenges, high costs or proven lack of utility of landscape design of infrastructure, focussing on dam-design practice. Initially, we investigate global practic...
There is a widespread perception that every year wildfires are intensifying on a global scale, something that is often used as an indicator of the adverse impacts of global warming. However, from the analysis of wildfires that have occurred in the US, Canada, and Mediterranean countries, a trend that justifies this perception could not be identifie...
The creation of innovative tools, objects and artifacts that introduce abstract ideas in the real world is a necessary step for the evolution process and characterize the creative capacity of civilization. Sculpture is based on the available technology for its creation process and is strongly related to the level of technological sophistication of...
In our new paper published in journal Entropy in October 2021, we provide insights on the concept of entropy and its relevance to societal and economic issues, with emphasis on wealth. We claim that the concept is widely misunderstood and misused, for example, to support ideologies related to ecological economics and negative Malthusian perspective...
While entropy was introduced in the second half of the 19th century in the international vocabulary as a scientific term, in the 20th century it became common in colloquial use. Popular imagination has loaded “entropy” with almost every negative quality in the universe, in life and in society, with a dominant meaning of disorder and disorganization...
The stochastic analysis in the scale domain (instead of the traditional lag or frequency domains) is introduced as a robust means to identify, model and simulate the Hurst–Kolmogorov (HK) dynamics, ranging from small (fractal) to large scales exhibiting the clustering behavior (else known as the Hurst phenomenon or long-range dependence). The HK cl...
Version 1 of our paper “Entropy and Wealth” received three anonymous reviews and an additional assessment by an anonymous Academic Editor. Based on them, the paper thankfully received a decision for publication in the journal Entropy after major revisions. As seen below, where all review material is reproduced, the opinions about the paper cover th...
While entropy was introduced in the second half of the 19th century in the international vocabulary as a scientific term, in the 20th century it became common in colloquial use. Popular imagination has loaded “entropy” with almost every negative quality in the universe, in life and in society, with a dominant meaning of disorder and disorganization...
Water, energy, land, and food are vital elements with multiple interactions. In this context, the concept of a water-energy-food (WEF) nexus was manifested as a natural resource management approach, aiming at promoting sustainable development at the international, national, or local level and eliminating the negative effects that result from the us...
![Figure 15. United Kingdom (1970-2018): (a) GDP per capita and Φ[x]; (b)...](profile/Demetris-Koutsoyiannis/publication/350495534/figure/fig13/AS:1007054382723106@1617111883528/United-Kingdom-1970-2018-a-GDP-per-capita-and-Phx-b-Gini-and-entropic-index-of_Q320.jpg)
In human societies, we observe a wide range of types of stratification, i.e., in terms of financial class, political power, level of education, sanctity, and military force. In financial, political, and social sciences, stratification is one of the most important issues and tools as the Lorenz Curve and the Gini Coefficient have been developed to d...
Throughout human history, the quantification of aesthetics has intrigued philosophers, artists, and mathematicians alike. In this chapter, a methodology based on stochastic mathematics is applied for the quantification of aesthetic attributes of paintings and landscapes. The paintings analyzed include Da Vinci, Pablo Picasso, and various other cele...
A physical process is characterized as complex when it is difficult to analyze and explain in a simple way, and even more difficult to predict. The complexity within an art painting is expected to be high, possibly comparable to that of nature. Herein, we apply a 2D stochastic methodology to images of both portrait photography and artistic portrait...
Even though landscape quality is largely a subjective issue, the integration of infrastructure into landscapes has been identified as a key element of sustainability. In a spatial planning context, the landscape impacts that are generated by infrastructures are commonly quantified through visibility analysis. In this study, we develop a new method...
Clustering structures appearing from small to large scales are ubiquitous in the physical world. Interestingly, clustering structures are omnipresent in human history too, ranging from the mere organization of life in societies (e.g., urbanization) to the development of large-scale infrastructure and policies for meeting organizational needs. Indee...
This research uses a stochastic computational tool (2D-C) for characterizing images in order to examine similarities and differences among artworks. 2D-C is measures the degree of variability (change in variability vs. scale) in images using stochastic analysis.
Apparently, beauty is not easy to quantify, even with stochastic measures. The meaning...
Wind turbines are large-scale engineering infrastructures that may cause significant social reactions, due to the anticipated aesthetic nuisance. On the other hand, aesthetics is a highly subjective issue, thus any attempt towards its quantification requires accounting for the uncertainty induced from subjectivity. In this work, taking as example t...
A physical process is characterized as complex when it is difficult to analyze or explain in a simple way. The complexity within an art painting is expected to be high, possibly comparable to that of nature. Therefore, constructions of artists (e.g., paintings, music, literature, etc.) are expected to be also of high complexity since they are produ...
ΟΙ ΠΑΡΑΔΟΣΙΑΚΕΣ ΤΕΧΝΙΚΕΣ ΚΑΤΑΣΚΕΥΗΣ ΜΕ ΧΩΜΑ ΑΠΟΤΕΛΟΥΝ ΣΤΟΙΧΕΙΟ ΤΗΣ ΑΡΧΙΤΕΚΤΟΝΙΚΗΣ ΜΑΣ ΚΛΗΡΟΝΟΜΙΑΣ. ΠΑΡΟΛΟ ΠΟΥ ΠΑΡΑΓΚΩΝΙΣΤΗΚΑΝ ΑΠΟ ΤΑ ΣΥΓΧΡΟΝΑ ΥΛΙΚΑ ΚΑΙ ΤΙΣ ΝΕΕΣ ΤΕΧΝΟΛΟΓΙΕΣ, Η ΑΦΘΟΝΙΑ ΤΟΥ ΥΛΙΚΟΥ ΣΤΗ ΦΥΣΗ ΚΑΙ ΚΥΡΙΩΣ Η ΟΙΚΟΛΟΓΙΚΗ ΤΟΥ ΣΥΜΠΕΡΙΦΟΡΑ ΕΧΕΙ ΠΡΟΣΕΛΚΥΣΕΙ ΤΑ ΤΕΛΕΥΤΑΙΑ ΧΡΟΝΙΑ ΤΟ ΕΝΔΙΑΦΕΡΟΝ ΣΤΗ ΣΥΓΧΡΟΝΗ ΑΡΧΙΤΕΚΤΟΝΙΚΗ. Η ΔΟΜΗΣΗ ΜΕ ΑΨΗΤΗ ΓΗ, ΜΕ ΩΜ...
Water is the basis of our civilization and the development of society is intertwined with the exploitation of water resources in various scales, from a well dug to irrigate a garden, to a large dam providing water and energy for a large area. However, for remote mountainous areas, intermittent natural water resources and high seasonal demand the ab...
Fujian Tulou is a significant part of the international built heritage. Renovation and strengthening of existing Haka Tulou’s earth constructions can ensure a better quality of life for their residents, as well as contribute to a long-lasting prominence of China’s heritage. Previous studies of Fujian Tulou mainly cover habitation patterns, construc...
Renewable energy (RE) installations and civil works are beneficial in terms of sustainability, but a considerable amount of space in the landscape is required in order to harness this energy. In contemporary environmental theory the landscape is considered an environmental parameter and the transformation of the landscape by RE works has received i...
Modern organized societies require robust infrastructures, among which hydraulic projects, such as water supply and drainage systems, are most important, particularly in water-scarce areas. Athens is a unique example because it is a big city (population 3.7 million) located in a very dry area. In order to support the development of the city, large...
The construction and operation of large dams has been questioned in recent years as, despite their positive effect on the economy, they are regarded as negative to the environment. The size of a dam, in particular, is an important aspect of this debate as it is thought to increase its economic benefit but also its environmental impacts. We investig...
Stochastics help develop a unified perception for natural phenomena and expel dichotomies like random vs. deterministic, as both randomness and predictability coexist and are intrinsic to natural systems which can be deterministic and random at the same time, depending on the prediction horizon and the time scale. The high complexity and uncertaint...
Decisions on technical issues must simultaneously satisfy several conflicting objectives. Several methods have been developed to help identify the "optimal" decision. Such decisions are made by politicians but experts, constructors and the society must have the ability to overview and influence these decisions. The interaction of the different grou...
![Figure 5.6: Mortar Mixer [Koroneos 2005]](profile/G-Fivos-Sargentis/publication/339850775/figure/fig4/AS:868006972370946@1583960397460/Mortar-Mixer-Koroneos-2005_Q320.jpg)
Earth is one of the most abundant, most locally available, cheapest and lowest energy input impact materials it‘s possible to build with.Τhe energy required to dig up and treat sufficient earth for a house, was all provided by humans and animals. Nowadays, mechanical extraction and mixing is the more likely method, but assuming the earth is sourced...
In technical problems where decisions must simultaneously satisfy several conflicting objectives, methods are based on benefit-cost analysis or multicriteria decision analysis helpful to identify the “optimal” decision. Usually big technical decisions are made by politics and influence the environment, but specialists, constructors and the society...
The Hurst-Kolmogorov (HK) behaviour (i.e. power-law decrease of the process variance vs. scale of averaging) has been already identified in numerous geophysical processes highlighting the large uncertainty of Nature in all time scales. In this study, we investigate through the climacogram whether or not some art works (such as paintings, music piec...
Organized societies require specific infrastructures, among which hydraulic projects are most important. Thus, for the functioning of a society, the water supply and drainage are prerequisites, while a new modern society also needs renewable energy in addition to, and in connection with, high quality water. Dams are key infrastructures in this proc...
Γενικώς, υπάρχουν διάφορες μεθοδολογίες προσδιορισμού της ενσωματωμένης ενέργειας, των οποίων οι διαφορές προκύπτουν από τον τρόπο που γίνονται οι μετασχηματισμοί της ενέργειας και από το είδος του σύστηματος με το ο-ποίο αποδίδεται η ενεργειακή απαίτηση των ροών. Εκτός, λοιπόν, των τυπικών ενεργειακών μεγεθών, ορισμένες μεθοδολογίες απεικονίζουν τ...
H low -tech" αρχιτεκτονική ή αρχιτεκτονική χαμηλών τεχνολογικών απαιτήσεων εστιάζει το ενδιαφέρον της στη δημιουργία αρχιτεκτονημάτων που αποφεύγουν να χρησιμοποιούν την "υψηλή τεχνολογία" σε κάθε στάδιο του κύκλου ζωής τους. Σήμερα, στον κόσμο των κατασκευών, με τον όρο "υ-ψηλή τεχνολογία" εννοούμε, πέρα από το εύρος των αναπτυσσόμενων ικανοτήτων,...
Scientists believe they can drive the discussion on the environmental impacts of human activity by encapsulating them with models and equations. But societies, economies and their environmental aspects are extremely complicated and unpredictable systems. It is practically impossible to calculate their evolution with deterministic models as we ignor...
The area of Kria Vrisy in North Evia is a unique landscape shaped by Almyros river. Almyros river is 1,6 Km in length and comes from a place named "Mati" from where the river drained underground. The altitude of the source named "Mati" is very close to sea level and the river has steady and laminar flow throughout the year. Therefore the river mout...
Όταν αναφέρεται κανείς σήμερα στην οικολογι-κή (πράσινη) αρχιτεκτονική, εκτός από την αξιο-ποίηση των αρχών της βιοκλιματικής αρχιτεκτο-νικής (προσανατολισμού κτιρίου, φυσικού αερι-σμού κ.ά.), θα πρέπει να συμπεριλάβει και την α-ξιολόγηση των δομικών υλικών με οικολογικά κριτήρια. Η επιλογή των υλικών ενός κτιρίου εξαρτάται ά-μεσα από μια σειρά οικ...
Earth building is an ancient construction method, rarely in use in contemporary architecture. In skyscrapers, apartment blocks and other typical high constructions, reinforced concrete, metal and many other conventional materials are used in order for them to be build. But the same methods and the same materials are in use for small-scale buildings...
Infrared imaging is a non destructive method, which determines the thermal behaviour of building materials in situ. Through infrared imaging, thermal bridges, moisture absorbed by buildings’ materials as well as other parameters related to a building’s thermal and energy behaviour can be determined. A building’s heat losses can be distinguished int...
EXTENDED SUMMARY The Plastiras dam was constructed in the late 1950s mainly for electric power production, but it has also partially covered irrigation needs and water supply of the plain of Thessaly. Later, the site has been designated as an environment conservation zone because of ecological and landscape values, while tourist activities have bee...
The possible water management of the Plastiras Lake, an artificial reservoir in central Greece, is examined. The lake and surrounding landscape are aesthetically degraded when the water level drops, and the requirement of maintaining a high quality of the scenery constitutes one of the several conflicting water uses, the other ones being irrigation...
The Plastiras Lake is an artificial reservoir, constructed for hydroelectric use and noticed for its beautiful scenery. The landscape is dominated by the presence of water, which constitutes a pleasant aesthetic target that attracts the observer and can therefore be determined as a magnetic focus point. The lake is a typical surrounded landscape, w...
The Plastiras reservoir, sited in Western Thessaly, Greece, is a multipurpose project used for irrigation, water supply, hydropower, and recreation; the importance of the latter is continuously increasing as the reservoir landscape becomes attractive to tourists. These uses are competitive and result in a particularly complex problem of water manag...
EXTENDED ABSTRACT The Plastiras Lake is an artificial reservoir created in 1959 for hydroelectric production. Following different changes in the social, economic and physical context of the area, the water of the lake has been used mainly for irrigation and drinking water supply. Recently, the beautiful scenery of the lake has been considered attra...
In this essay a method for the evaluation of building design is formed, which takes into consideration the crucial parameters of design and evaluates their environmental impact during the life-cycle of a building (construction, operation, and demolition). Buildings of similar geometrical characteristics, but constructed of different materials are b...
Myths are the expression of a group’s unconscious. The genesis of a myth is the result of civilization’s experience and myth’s objective in past societies was to build a guide for social behavior. An important question is whether the characteristics of the myth or the characteristics of the modern thinking can be a good guide to fulfill the expecta...
Projects
Projects (2)
The principal aim of ADDOPTML Network is to create and test an holistic machine learning aided optimum design-manufacturing process of civil structures by developing strong synergies among a multi-disciplinary team of academic experts and SMEs from Belgium, Cyprus, Germany, Greece, Italy, Jordan, Netherlands and Spain. This will be achieved taking advantage of ongoing progress in AM technologies including recycled consumables. Contributing among others to the great challenge becoming Europe the world's first climate-neutral bloc by 2050. In addition, as coronavirus pandemic continues to sweep the World, many countries are facing shortage of intensive care units and emergency rooms; an integrated structural design framework based on AM optimized structural elements for transitional structures will be developed.
