506 research outputs found
Developing crop canopy model for irrigation of high-density olive groves by using UAV imagery
No full textPlant architecture is a key issue in understanding olive tree water needs. The aim of this study is to evaluate water requirements of a high-density olive grove by coupling an agro-hydrological model with UAV-based, high-resolution 2D imagery and 3D structure from motion (SfM) reconstruction. Three planting densities (1670, 1000, 500 trees ha-1) were drip irrigated according to two irrigation regimes. Evapotranspiration was estimated using FAO56 and FAO66-modified approaches. FAO66 input data (canopy volume and coverage) were quantified using manual ground-based surveys, 2D imagery and 3D SfM reconstruction. 2D imagery showed better relationships to ground-based area and volume estimates than the 3D SfM approach. Moreover, coupling the ET model with 2D data accurately predicted crop water needs
The Δρομοδείχτης της Ελλάδος of 1824 and Athanasios Stageirites (Τίτλος περίληψης)
No full textσ. [281]-290Κείμενο στα ελληνικά με περίληψη στα αγγλικά με τον τίτλο: The Δρομοδείχτης της Ελλάδος of 1824 and Athanasios StageiritesThe article first examines the close relationship between the publication “Δρομοδείχτης της Ελλάδος” [1824] and the publication “Ηπειρωτικά” (1819) by Athanasios Stageirites and then suggests that Athanasios Stageirites is the likeliest author of the “Δρομοδείχτης της Ελλάδος”.Δωδώνη: Τεύχος Πρώτο: επιστημονική επετηρίδα του Τμήματος Ιστορίας και Αρχαιολογίας της Φιλοσοφικής Σχολής του Πανεπιστημίου Ιωαννίνων; Τόμ. 43-44 (2014-2015
Dataset in support of the Southampton doctoral thesis 'The boatbuilding tradition of the Aegean during the Late Neolithic – Early Bronze Age periods. Typological classification, digital reconstruction and seakeeping assessment'
No full textDataset in support of the Southampton doctoral thesis 'The boatbuilding tradition of the Aegean during the Late Neolithic – Early Bronze Age periods. Typological classification, digital reconstruction and seakeeping assessment' Appendix D - Resistance data and Appendix C - Stability data.
This dataset is focused on two appendices:
Appendix D - Resistance data. D.1 Resistance data produced by the author via MAXSURF Resistance for this thesis.
Appendix C - Stability data
C1. Stability data – STIX and ISO criteria, produced by the author via MAXSURF Stability software for his thesis
This research was funded by Southampton Marine and Maritime Institute (SMMI), Vice-Chancellor's Scholarship, Greek Archaeological Committee UK (GACUK)
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Opportunities for Urban Agriculture: Balcony Hydroponics in Thessaloniki
No full textThe economic crisis currently in Greece has led to adverse health impacts as people are more frequently choosing inexpensive foods over fresh vegetables. Local residents of Thessaloniki would like to participate in urban agriculture to grow their own fresh vegetables, but suitable land is scare in this densely populated metropolis. We evaluated balcony hydroponics within Thessaloniki, in collaboration with Dr. Athanasios Gertsis of Perrotis College. Utilizing an iterative, human-centered design approach, we devised three hydroponic systems that are cost, time and space efficient. These designs provide potential users with a variety of options regarding aesthetics and function
Cotton (Gossypium hirsutum l.) plant water status as a function of soil water supply and evaporative demand in a semiarid environment
No full textThe Southern High Plains of Texas (SHPT) representing a major cotton iGossypium hirsutum L.) growing area of the United States and the world is characterized as a semiarid environment with inadequate rainfall to meet the high evaporative demand. Soil water content and evaporative demand interact with the plant to determine tissue water status. Leaf water potential (øL), the primary indicator of plant water status, is commonly used in crop simulation models to determine growth rates and yield potential. Functional relationships between cotton øL and soil water supply and evaporative demand have not been well-defined for cotton grown in the SHPT area. A field experiment was conducted for two years to determine the relationship between *FL of cotton plants as a function of Ts, plant size and atmospheric factors affecting evaporative demand. Three irrigation levels (0%, 50% , and 100%) of replacement of water used as evapotranspiration (ETa) were used to provide a range of soil water supplies in two soil types (Amarillo loamy sand and Pullman clay loam), øL, soil water supply as indicated by soil matric potential Q^s), air temperature, relative humidity, incident and absorbed solar radiation, and plant growth were monitored throughout the growing season. Correlation and stepwise multiple regression were used to investigate and develop relationships between øL and øs and the evaporative demand. The variables highly correlated with øL were øs, and daily (24 hrs) average air temperatures (Tavg) as the most effective parameters of the evaporative demand. The relative contribution of each parameter on the variation explained for øL was shown not to be sensitive of plant growth stage as indicated by LAI ranges, but was sensitive to existing soil water supply. The overall effect of soil water supply was more dominant than the evaporative demand across the entire period of data measurement and within all LAI ranges. Crop growth rate (CGR), mainstem elongation rate (MER) and leaf area growth rate (LAGR) declined sharply when øL declined from its non-limiting conditions of -1.2 MPa to -1.6 MPa. From -1.6 MPa to -2.5 MPa øL growth rates continued to decline but at a slower rate. Essentially zero growth of all parameters was observed when øL dropped below -2.7 MPa. Results also indicated no differential sensitivity of reproductive versus vegetative growth rates to declining øL. In general, for cotton grown in the SHPT area, plant water status should be maintained above -1.6 MPa for maximum growth
Peak power reduction algorithms in asymmetric digital subscriber line modems
No full textThesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.Includes bibliographical references (leaves 94-96).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.This thesis investigates peak-to-average ratio (PAR) reduction techniques for multicarrier modulation systems, such as discrete multitone (DMT) modems and orthogonal frequency-division multiplexed (OFDM) terrestrial broadcast transmitters. Through simulation and test implementation on a state-of-the-art programmable ADSL development platform, this thesis pursues a suitable solution for minimizing PAR given the resources of a programmable platform. This solution is integrated as a prototype implementation into a fully-functional ADSL modem and optimized for maximum PAR reduction performance within modem complexity constraints.by Athanasios Dimitri Dousis.M.Eng
Homophobic Statements, a Bishop, and the Limits of Freedom of Expression. An In-Depth Commentary on ECtHR 31.08.2023, Amvrosios-Athanasios Lenis v. Greece, no. 47833/20
No full textDichiarazioni omofobe, un vescovo e i limiti della libertà di espressione. Un commento approfondito su CEDU 31.08.2023, Amvrosios-Athanasios Lenis v. Greece, no. 47833/20.
ABSTRACT: The decision of the ECtHR of 31.08.2023, Amvrosios-Athanasios Lenis v. Greece (no. 47833/20), is a further step toward an increasingly dense jurisprudence on “hate speech” and the limits of freedom of expression. The public proclamation of religious doctrines that are in conflict with the values of the contracting States enshrined in the ECHR is protected to a certain extent by the fundamental right of freedom of religion and belief. However, the qualification of a statement as religious does not justify “hate speech.” The AUTHOR shows the tension between freedom of religion, freedom of expression, and protection against discrimination, and analyzes the decision against the backdrop of Article 17 of the ECHR (prohibition of abuse of rights).
SOMMARIO: 1. Preliminary Remarks - 2. The Concept of Hate Speech - 3. The Facts of the Case - 4. The Procedure and Reasoning of the Court - 4.1 The ECtHR’s Preliminary Considerations on Fundamental Rights - 4.2 Legal assessment - 4.3 Some Remarks on (the Non-Invoked) Article 9 of the ECHR - 5. Concluding Remarks
La tomba III di Haghios Athanasios e il valore semantico dell'incarnato
No full textThe tomb III at Haghios Athanasios stands out among the Macedonian tombs for the exceptional painted decoration of the temple-like façade. Excavated in the '90s by M. Tsimbidou-Avloniti it has been published by the scholar in full detail and the iconographic program of the monument has been the object of many publications. This article re-examines the different ways of reproducing the skin color (το ανδρείκελον) in the figures of the miniature frieze and in the megalographic figures beside the door. The realistic rendering of the megalographic figures of armed men in Macedonian attire, showing their sorrow for the lost of an etairos, is contrasting with the pale color of the participants to the symposion in the frieze above the door, a scene whose illusionistic overtone has been yet perceived by the critics. This symposion is articulated in three scenes and it can be interpeted as a necrodeipnon, but in the same time as a celebration of the Macedonian banquet style, centered on the royal court. The author suggests that the first figure on the right of the frieze, related to the group of armed men looking towards the banqueters feasting in the center of the frieze, can be read as the dead himself, for the particular rendering of his ανδρείκελον, showing the typical ochròtes or necròdes face color, according to the contemporary medical lexicon. The pathetic stance assumed by the same figure, the sole in the group which is not bearing arms, seems to confirm his role in the context of the scene
Precision Agriculture Applications in a High Density Olive Grove Adapted for Mechanical Harvesting in Greece
No full textAbstractWorldwide olive production recently has undergone major changes in terms of harvesting technologies and planting densities. A new educational, research and exhibition olive grove was established at Perrotis College, Greece in 2010 to evaluate new production systems under a variety of planting densities and major input treatments for two of the most commonly used olive varieties globally, under high density palnting systems adapted for mechanical harvesting. Precision agriculture practices were used in this olive grove, to identify possible “zones of variation” for yield, crop reflectance using the handheld GreenSeeker® NDVI sensor and for soil moisture and electrical conductivity. The results are presented herein for the second year after planting and they indicated distinctive zones of variability for the measured characteristics. These zones will be considered and further validated in the current season, to provide alternative management practices for optimization of olive production and combined with additional soil and agronomic parameters
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