519 research outputs found
Environmental ethics: values in and duties to the natural world (summarized with commentary by Panagiotis Perros)
No full textSummarized with commentary in Greek by Panagiotis Perros.Environmental ethics stands on a frontier, as radically theoretical as it is applied. Alone, it asks whether there can be nonhuman objects of duty. Animals, plants, endangered species, ecosystems, and even Earth are progressively unfamiliar as objects of duty, and puzzles arise both for theory and practice. Answers to such questions are as urgent as any humans face, and intimately related to the four principal issues on the world agenda: peace, population, development, and environment
R-CAUSTIC: Rippling CAUSTICs underwater Image dataset
No full text<p><strong>Description</strong></p><p>Rippling caustics seem to be the main factor degrading the underwater RGB image quality and affecting the image- based 3D reconstruction process in very shallow waters. These effects are adversely affecting image matching algorithms by throwing off most of them, leading to less accurate matches and causing issues in the Simultaneous Localization and Mapping (SLAM) based navigation of the Remotely Operated Vehicles (ROV) and Autonomous Underwater Vehicles (AUV) on shallow waters. Also, they are the main cause for dissimilarities in the generated textures and orthoimages. In order to fill the gap in the literature regading underwater rippling caustics imagery with real ground truth and reference images, the first real-world underwater caustics benchmark dataset which contains 1465 underwater images is presented. Together with the RGB imagery, the corresponding generated ground truth images are delivered for facilitating the training and testing of machine learning and deep learning methods for image classification. R-CAUSTIC dataset also provides the necessary data to evaluate, at least to some extent, the performance of 3D reconstruction approaches. Data were acquired using a GoPro Hero 4 Black action camera with image dimensions of 4000 x 3000 pixels, focal length of 2.77mm and pixel size of 1.55μm and a tripod. Action cameras are widely used for underwater image acquisition. The dataset was captured in near-shore underwater sites at depths varying from 0.5 to 2m. No artificial light sources were used. Due to the wind, the turbulent surface of the water created dynamic rippling caustics on the seabed. In total 1465 RGB images were collected, separated in 7 different datasets; five of them containing stereo images, one of them tri-stereo images and one consists of multi-stereo imagery acquired in 7 different camera poses.</p><p> </p><p><strong>Publication</strong></p><p>The paper is availbale in Open Access here: https://ieeexplore.ieee.org/document/10172291</p><p><strong>If you use this dataset please cite it as R-CAUSTIC</strong> [Reference].<br>[Reference]: <strong>P. Agrafiotis, K. Karantzalos and A. Georgopoulos, "Seafloor-Invariant Caustics Removal From Underwater Imagery," in </strong><i><strong>IEEE Journal of Oceanic Engineering</strong></i><strong>, vol. 48, no. 4, pp. 1300-1321, Oct. 2023, doi: 10.1109/JOE.2023.3277168.</strong></p><p>BibTeX:</p><p>@ARTICLE{10172291,
author={Agrafiotis, Panagiotis and Karantzalos, Konstantinos and Georgopoulos, Andreas},
journal={IEEE Journal of Oceanic Engineering},
title={Seafloor-Invariant Caustics Removal From Underwater Imagery},
year={2023},
volume={48},
number={4},
pages={1300-1321},
doi={10.1109/JOE.2023.3277168}}</p><p> </p>
R-CAUSTIC: Rippling CAUSTICs underwater Image dataset
No full text<p> </p>
<h3><strong>Version 2 available! Please make sure to download the latest version of the dataset! <br></strong></h3>
<p> </p>
<p><strong>Description</strong></p>
<p>Rippling caustics seem to be the main factor degrading the underwater RGB image quality and affecting the image- based 3D reconstruction process in very shallow waters. These effects are adversely affecting image matching algorithms by throwing off most of them, leading to less accurate matches and causing issues in the Simultaneous Localization and Mapping (SLAM) based navigation of the Remotely Operated Vehicles (ROV) and Autonomous Underwater Vehicles (AUV) on shallow waters. Also, they are the main cause for dissimilarities in the generated textures and orthoimages. In order to fill the gap in the literature regading underwater rippling caustics imagery with real ground truth and reference images, the first real-world underwater caustics benchmark dataset which contains 1465 underwater images is presented. Together with the RGB imagery, the corresponding generated ground truth images are delivered for facilitating the training and testing of machine learning and deep learning methods for image classification. R-CAUSTIC dataset also provides the necessary data to evaluate, at least to some extent, the performance of 3D reconstruction approaches. Data were acquired using a GoPro Hero 4 Black action camera with image dimensions of 4000 x 3000 pixels, focal length of 2.77mm and pixel size of 1.55μm and a tripod. Action cameras are widely used for underwater image acquisition. The dataset was captured in near-shore underwater sites at depths varying from 0.5 to 2m. No artificial light sources were used. Due to the wind, the turbulent surface of the water created dynamic rippling caustics on the seabed. In total 1465 RGB images were collected, separated in 7 different datasets; five of them containing stereo images, one of them tri-stereo images and one consists of multi-stereo imagery acquired in 7 different camera poses.</p>
<p> </p>
<p><strong>Publication</strong></p>
<p>The paper is availbale in Open Access here: https://ieeexplore.ieee.org/document/10172291</p>
<p><strong>If you use this dataset please cite it as R-CAUSTIC</strong> [Reference].<br>[Reference]: <strong>P. Agrafiotis, K. Karantzalos and A. Georgopoulos, "Seafloor-Invariant Caustics Removal From Underwater Imagery," in </strong><em><strong>IEEE Journal of Oceanic Engineering</strong></em><strong>, vol. 48, no. 4, pp. 1300-1321, Oct. 2023, doi: 10.1109/JOE.2023.3277168.</strong></p>
<p>BibTeX:</p>
<p>@ARTICLE{10172291, author={Agrafiotis, Panagiotis and Karantzalos, Konstantinos and Georgopoulos, Andreas}, journal={IEEE Journal of Oceanic Engineering}, title={Seafloor-Invariant Caustics Removal From Underwater Imagery}, year={2023}, volume={48}, number={4}, pages={1300-1321}, doi={10.1109/JOE.2023.3277168}}</p>
<p> </p>
Does genetic diversity on corporate boards lead to improved environmental performance?
No full textElsevier
Journal of International Financial Markets, Institutions and Money
Volume 84, April 2023, 101756
Journal of International Financial Markets, Institutions and Money
Does genetic diversity on corporate boards lead to improved environmental performance?
Author links open overlay panelRenatas Kizys a, Emmanuel C. Mamatzakis b, Panagiotis Tzouvanas c
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https://doi.org/10.1016/j.intfin.2023.101756
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Highlights
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We examine the effect of boards’ genetic diversity (GENETICD) on corporate ESG performance.
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ESG performance and disclosures are higher in more genetically diverse firms.
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The positive GENETICD effect on ESG performance is driven by the environmental pillar.
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Corporate carbon performance significantly improves with increases in GENETICD.
We study the effects of boards’ genetic diversity on corporate environmental performance. Using a multidimensional information set for 3690 US firms during the period from 2005 to 2019, and three different measures of genetic diversity, we find that, pursuant to the diversity theory, which posits that diversity improves the quality of management decisions and business ethics, genetic diversity leads to improved environmental performance. We also find that genetic diversity improves carbon and governance performance, and ESG disclosure. Particularly, a one percentage point increase in boards’ genetic diversity will increase the carbon performance, measured by the inverse of the carbon emissions to total assets ratio, and environmental performance by 3.54% and 5.57%, respectively. Our results remain robust to different model specifications, while also controlling for endogeneity. In terms of policy implications, results suggest that the key to tackling climate challenges is to promote boards’ genetic diversity
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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Ideas in trenches: Power and polemics in Panagiotis Kondylis
No full textThe author of the article attempts to examine the positions of Panagiotis Kondylis on the intellectual history and ideas’ polemical nature that is the basic feature for understanding the configuration and development of an idea-theory in history. In order to achieve a full understanding of the specific concept of the intellectual history, first of all we have to analyze the Greek thinker's positions on the power and the way in which the search for power as a basic and irrevocable anthropological condition leads to a polemic condition within the social field. This polemic condition is also evident in the field of ideas, as ideas can be seen as the attempt to form worldviews by the respective subject or group of subjects that have the purpose of self-preservation and expanding their power. Therefore, in this article the emphasis is placed on two different areas of Kondylis' thought, the philosophy of man and then on the description of the ideas’ formulation. 
Mini-review: The role of crop rotation, intercropping, sowing dates and increased crop density towards a sustainable crop and weed management in arable crops
No full textSaabunud / Received 17.05.2020 ; Aktsepteeritud / Accepted 29.05.2020 ; Avaldatud veebis / Published online 30.05.2020 ; Vastutav autor / Corresponding author: Panagiotis Kanatas e-mail: [email protected] extended and in many cases unjustified use of herbicides
has resulted in herbicide resistance development and serious environmental
concerns. Therefore, the need for implementation and wider adoption of
several agronomic and cultural practices is imperative. Ecologically-based
crop management practices like crop rotation, intercropping, delay of
sowing date and increased crop density can be also the basis for effective
and sustainable weed management. In the present review, several cases are
presented and the key points of each method are discussed. Special attention
is given to the fact that the efficacy of each practice is depended on the
specific soil and climatic conditions along with the field history of each site
and crop. Alternative methods of weed management should be further
studied and optimized to include them in both organic and conventional
production systems and ensure the sustainability of agroecosystems
Latin America's experience with export subsidies
No full textTwenty years ago, it ws believed that export subsidies would produce more diversification and better export performance. This has not happened. In most cases, export subsidies were not supported by more open import policies - so subsidies reduced only marginally the anti-export bias of Latin American countries. Unstable real exchange rates have also hurt exports. Export subsidies appear to have improved exports in Brazil, which also liberalized imports, stabilized exchange rates, and promoted other policies conducive to export growth. Yet Mexico, after reducing import barriers, also enjoyed improved exports - with minimum export subsidies, and with apparently lower social costs than Brazil experienced. Export subsidies have failed in other Latin American countries - and particularly hurt development in Argentina, where fraud, corruption, and rent-seeking have been rampant. The author contends that the failure of export subsidies should remind us of the importance of distinguishing what is possible from what is likely. Finally, export subsidies compete with other government programs, and, considering their failure rate, the money might be better spent on infrastructure, health, and education projects.Tax Law,Economic Theory&Research,TF054105-DONOR FUNDED OPERATION ADMINISTRATION FEE INCOME AND EXPENSE ACCOUNT,Environmental Economics&Policies,Economic Stabilization
Authorship: author and work
No full text127 σ.Ο πνευματικός δημιουργός έχει διανύσει μία τεράστια απόσταση στον τρόπο με τον οποίο υλοποιείται στη συλλογική συνείδηση η δημιουργική του υπόσταση, με αφετηρία τον απλό γραφέα του μεσαίωνα, τον μιμητή των κλασικών και εδραιωμένων προτύπων και κατάληξη την σταρ-προσωπικότητα, την ταλαντούχα και πρωτότυπη δημιουργική δύναμη του 21ου αιώνα. Κάπου σε ένα σημείο ιστορικής και πολιτιστικής καμπής, η θεώρηση του πνευματικού δημιουργού έκανε τη μεταστροφή από την αντιγραφή στην πρωτότυπη δημιουργία, από τη μίμηση στην αυθεντικότητα, από την ανωνυμία στην προσωπικότητα. Η μετάβαση δεν πραγματοποιήθηκε από τη μία μέρα στην επόμενη, όμως οι εξελίξεις για την έννοια του πνευματικού δημιουργού και της αντίληψης της πνευματικής δημιουργίας και του έργου, του αποτελέσματος της δημιουργικής διαδικασίας ήταν ραγδαίες, με την ενίσχυση του μοντέλου της ταλαντούχας και ιδιαίτερης δημιουργικής προσωπικότητας, στην εποχή του Ρομαντισμού, την αμφισβήτησή και αποδόμησή του από φιλοσόφους, διανοούμενους και καλλιτέχνες του προηγούμενου αιώνα και την ανάδυση εναλλακτικών όρων που επαναδομούν την πνευματική δημιουργία γύρω από το δημιουργικό υποκείμενο, όμως επαναπροσδιορίζουν μία σειρά από ιδιότητες που επεκράτησε να συσχετίζονται με αυτή, την αποκλειστικότητα, την αυθεντία του δημιουργού, τα δικαιώματα εκμετάλλευσης και χρήσης, στο φως των τεχνολογικών εξελίξεων δικτύωσης και επικοινωνίας της σύγχρονης συγκυρίας.The notion of “authorship” has come an long way in the manner in which the creative personality manifests itself in our collective consciousness. From the scribe of the Middle Ages , to the imitator of the classics and of established standards, to the talented and original creative force of the 21st century . In a historical and cultural turning point , the concept of authorship made the shift from copying to original creation; from imitation to originality; from anonymity to celebrity . The transition did not take place overnight, but the developments for the concept of the author and the work- the result of the creative process- were rapid. First the Romantic paradigm of a talented and gifted creative individual was reinforced, then the deconstruction and re-evaluation of the modes of authorship gained eminence guided by the thought of philosophers, intellectuals and artists of the last century and now an alternative new mode of authorship is emerging in the light of technological developments in networking and communications, challenging the exclusivity, the authority, the rights and the authenticity of traditional authorship paradigms
HPLC evaluation of tyrosine and its metabolites
No full textCharles University in Prague Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Chemistry and Pharmaceutical Analysis Author: Panagiotis Michailellis Supervisor: PharmDr. Petr Kastner, PhD. Title of Diploma Thesis: HPLC evaluation of tyrosine and its metabolites Tyrosine is an important precursor of catecholamines, which are dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline). These are neurotransmitters and hormones, crucial for every living organism. Therefore, their identification and evaluation in biological material would aim to understand their function and behavior more accurately. This Diploma Thesis is a review on how to evaluate catecholamines and their metabolites in biological matter with analytical methods used in Pharmaceutical Analysis, especially with HPLC. First chapters present theoretical knowledge about metabolism of tyrosine and its metabolites, how a sample from an organism should be treated in order to be examined, information about HPLC, CE, GC apparatuses and the main detectors used in analysis of these compounds. In literature review, tables are presented, concerning different sample preparation methods, HPLC details and characteristics, and finally a sum of all the analytical methods studied for this Diploma Thesis. All the articles and..
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