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44 results on '"Papadopoulos Aristotelis"'

1. Correlation between Weather Conditions and Burnt Areas in 25 Years of Forest Firefighting by the Fire Brigade

Author

Gouvas Markos, Papadopoulos Aristotelis, Bolis Stefanos, and Iliopoulos Nikolaos

Subjects
wildfires, fire brigade, weather condition, burnt area, Environmental sciences, GE1-350
Abstract

In this paper, research on the relationship between forest fires and meteorology is carried out using simple meteorological variables (temperature, wind, and precipitation) from a few well-selected Greek meteorological stations. The 5 years (1998, 2000, 2007, 2012, and 2021) which recorded burnt areas for more than the 25-year average (37,000 ha) had as a common characteristic, on the one hand, a much drier than usual two-month period (July–August) following a winter period with a shortage of rainfall, and on the other hand a number of days with very high temperatures higher than the average of the last 25 years. The latter implies that average temperatures in all three summer months were at least 1 °C above their normal value. In the years following, the burnt areas were below their average regardless of the precipitation and summer temperature patterns. However, when precipitation during the two-month period (July–August) was two or more times more than normal, fire seasons had, at most, one-third of the 25-year average of burned areas, regardless of the precipitation of the winter periods preceding and summer temperatures in those years. This is very important as already in the early days of each fire season it will be possible to make an estimation of its outcome and to prepare more appropriately when the accuracy of the long-term seasonal forecast of temperature and rainfall anomalies is improved.

Published
2023
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2. Integrated Traffic Simulation-Prediction System using Neural Networks with Application to the Los Angeles International Airport Road Network

Author

Zhang, Yihang, Papadopoulos, Aristotelis-Angelos, Chen, Pengfei, Alasiri, Faisal, Yuan, Tianchen, Zhou, Jin, and Ioannou, Petros A.

Subjects
Electrical Engineering and Systems Science - Signal Processing, Computer Science - Machine Learning, Electrical Engineering and Systems Science - Systems and Control
Abstract

Transportation networks are highly complex and the design of efficient traffic management systems is difficult due to lack of adequate measured data and accurate predictions of the traffic states. Traffic simulation models can capture the complex dynamics of transportation networks by using limited available traffic data and can help central traffic authorities in their decision-making, if appropriate input is fed into the simulator. In this paper, we design an integrated simulation-prediction system which estimates the Origin-Destination (OD) matrix of a road network using only flow rate information and predicts the behavior of the road network in different simulation scenarios. The proposed system includes an optimization-based OD matrix generation method, a Neural Network (NN) model trained to predict OD matrices via the pattern of traffic flow and a microscopic traffic simulator with a Dynamic Traffic Assignment (DTA) scheme to predict the behavior of the transportation system. We test the proposed system on the road network of the central terminal area (CTA) of the Los Angeles International Airport (LAX), which demonstrates that the integrated traffic simulation-prediction system can be used to simulate the effects of several real world scenarios such as lane closures, curbside parking and other changes. The model is an effective tool for learning the impact and possible benefits of changes in the network and for analyzing scenarios at a very low cost without disrupting the network., Comment: 19 pages. Under review

Published
2020

3. Personalized Pareto-Improving Pricing-and-Routing Schemes for Near-Optimum Freight Routing: An Alternative Approach to Congestion Pricing

Author

Papadopoulos, Aristotelis-Angelos, Kordonis, Ioannis, Dessouky, Maged M., and Ioannou, Petros A.

Subjects
Mathematics - Optimization and Control, Computer Science - Computer Science and Game Theory
Abstract

We design a coordination mechanism for truck drivers that uses pricing-and-routing schemes that can help alleviate traffic congestion in a general transportation network. We consider the user heterogeneity in Value-Of-Time (VOT) by adopting a multi-class model with stochastic Origin-Destination (OD) demands for the truck drivers. The main characteristic of the mechanism is that the coordinator asks the truck drivers to declare their desired OD pair and pick their individual VOT from a set of $N$ available options, and guarantees that the resulting pricing-and-routing scheme is Pareto-improving, i.e. every truck driver will be better-off compared to the User Equilibrium (UE) and that every truck driver will have an incentive to truthfully declare his/her VOT, while leading to a revenue-neutral (budget balanced) on average mechanism. This approach enables us to design personalized (VOT-based) pricing-and-routing schemes. We show that the Optimum Pricing Scheme (OPS) can be calculated by solving a nonconvex optimization problem. To improve computational efficiency, we propose an Approximately Optimum Pricing Scheme (AOPS) and prove that it satisfies the aforementioned properties. Both pricing-and-routing schemes are compared to the Congestion Pricing with Uniform Revenue Refunding (CPURR) scheme through extensive simulation experiments where it is shown that OPS and AOPS achieve a much lower expected total travel time and expected total monetary cost for the users compared to the CPURR scheme, without negatively affecting the rest of the network. These results demonstrate the efficiency of personalized (VOT-based) pricing-and-routing schemes., Comment: Accepted as a Journal article in Transportation Research Part C: Emerging Technologies

Published
2019
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4. Why Should we Combine Training and Post-Training Methods for Out-of-Distribution Detection?

Author

Papadopoulos, Aristotelis-Angelos, Shaikh, Nazim, and Rajati, Mohammad Reza

Subjects
Computer Science - Machine Learning, Computer Science - Computer Vision and Pattern Recognition, Statistics - Machine Learning
Abstract

Deep neural networks are known to achieve superior results in classification tasks. However, it has been recently shown that they are incapable to detect examples that are generated by a distribution which is different than the one they have been trained on since they are making overconfident prediction for Out-Of-Distribution (OOD) examples. OOD detection has attracted a lot of attention recently. In this paper, we review some of the most seminal recent algorithms in the OOD detection field, we divide those methods into training and post-training and we experimentally show how the combination of the former with the latter can achieve state-of-the-art results in the OOD detection task., Comment: Preprint, 9 pages. arXiv admin note: text overlap with arXiv:1906.03509

Published
2019

5. Outlier Exposure with Confidence Control for Out-of-Distribution Detection

Author

Papadopoulos, Aristotelis-Angelos, Rajati, Mohammad Reza, Shaikh, Nazim, and Wang, Jiamian

Subjects
Computer Science - Machine Learning, Computer Science - Computer Vision and Pattern Recognition, Statistics - Machine Learning
Abstract

Deep neural networks have achieved great success in classification tasks during the last years. However, one major problem to the path towards artificial intelligence is the inability of neural networks to accurately detect samples from novel class distributions and therefore, most of the existent classification algorithms assume that all classes are known prior to the training stage. In this work, we propose a methodology for training a neural network that allows it to efficiently detect out-of-distribution (OOD) examples without compromising much of its classification accuracy on the test examples from known classes. We propose a novel loss function that gives rise to a novel method, Outlier Exposure with Confidence Control (OECC), which achieves superior results in OOD detection with OE both on image and text classification tasks without requiring access to OOD samples. Additionally, we experimentally show that the combination of OECC with state-of-the-art post-training OOD detection methods, like the Mahalanobis Detector (MD) and the Gramian Matrices (GM) methods, further improves their performance in the OOD detection task, demonstrating the potential of combining training and post-training methods for OOD detection., Comment: Accepted as a Journal paper at Neurocomputing. PyTorch code available at https://github.com/nazim1021/OOD-detection-using-OECC

Published
2019
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7. Mathematical model for border irrigation of cracked clay soils

Author

Papadopoulos, Aristotelis

Subjects
630, Agricultural engineering
Abstract

This thesis deals with the border irrigation of cracked clay soils. A deterministic mathematical model is proposed to simulate the border irrigation of VERTISOLS. The proposed model simulates the water advance phase using two submodels namely, one submodel for the unsteady one dimensional water flow through the network of cracks and a second one for the unsteady overland flow in the border. The two flows are coupled using the trial and error method. The end of the field is considered to be diked and the storage, depletion and recession phases are supposed to take place when the cracks are filled with water and therefore these phases are treated as if the soil was an ordinary one. The input data required by the model are the inflow discharge, the field length, the mean topographic slope, the geometrical data of the cracks as well as the coefficients for the Manning and Kostiakov formula. They are introduced in a conversational form from the keyboard. Outputs of the model are the water advance, in the network of cracks and in the border, storage, depletion, recession and the distribution of infiltrated water along the border strip. The outputs are presented numerically or/and in animated graphics. The validity of the model is verified by comparing these simulated outputs against the measured ones. The model can be useful for the practising or designing engineer to select the optimum combination of field length or slope as well as the appropriate inflow discharge and time of water application in order to irrigate these soils adequately. It also gives insight into the processes which occur during the surface irrigation of VERTISOLS and it is hoped it will stimulate further research on this topic.

Published
1990

20. Οι τραυματισμοί στο αγώνισμα του Ταεκβοντο μετά την αλλαγή των κανονισμών

Author

PAPADOPOULOS ARISTOTELIS and PANAGIOTOPOULOS GEORGIOS

Subjects
Education - Sport science, Εκπαίδευση – Αθλητισμός
Abstract

Η πολεμική τέχνη του Ταεκβοντο παρουσίασε ταχεία ανάπτυξη την δεκαετία του 1970.Μέχρι το 1973, όπου η παγκόσμια ομοσπονδία του Ταεκβοντο ιδρύθηκε και έλαβε μέρος στο 1ο διεθνές πρωτάθλημα, η αθλητική επιστήμη μελετά και ερευνά τους αγώνες στο Ταεκβοντο. Το Ταεκβοντο δεν παραμένει στάσιμο όπως άλλα μαχητικά αθλήματα, αλλά παρουσιάζει σταθερή βελτίωση στη τεχνική ,την προπονητική και τον εμπλουτισμό των διαφόρων κινήσεων.(Μπέης,2015) To Ταεκβοντο είναι ένα άθλημα το όποιο έχει υποστεί τα τελευταία χρόνια αλλαγές τόσο στους κανονισμούς και στον τρόπο παιχνιδιού των αθλητών όσο και στον τεχνολογικό εξοπλισμό που χρησιμοποιείται από τους αθλητές. Μετά την τελευταία τροποποίηση των κανονισμών το 2012 και την διαφοροποίηση της καταμέτρησης των πόντων,( 2 πόντοι για λάκτισμα στον θώρακα, 1 με γροθιά, 3 για λάκτισμα στο κεφάλι και 4 για περιστροφικό λάκτισμα με στόχο το κεφάλι), άλλαξε εκ νέου και ο τρόπος τεχνικής και τακτικής των αθλητών. Για την έρευνα αυτή κατασκευάστηκε εξ αρχής Ερωτηματολόγιο : Τραυματισμοί στο Tae Kwon Do. Οι τραυματισμοί μεταξύ των περιόδων πριν το 2012 και μετά δεν φαίνεται να έχουν αλλάξει καθώς τα σημεία που τραυματίζονται κατά κύριο λόγο είναι τα κάτω άκρα και συγκεκριμένα οι αστράγαλοι με ποσοστό 48%. Το πιο συνηθισμένο είδος τραυματισμού είναι οι μυϊκές κακώσεις σε ποσοστό 30%.Τα αποτελέσματα έδειξαν ότι εμφανίστηκε αύξηση των τραυματισμών την περίοδο 2012-2013, περίοδος μετάβασης στους νέους κανονισμούς για τους αθλητές και τους προπονητές, και ακολούθησε πτωτική πορεία μέχρι το 2017, από 76 στους 16 τραυματισμούς συνολικά. Προτείνεται σε κάθε μελλοντική αλλαγή των κανονισμών, να υπάρχει μια μεταβατική περίοδος τόσο για τους αθλητές όσο και για τους προπονητές προκειμένου να προσαρμόζουν τις αλλαγές στην προπόνηση για να αποφεύγονται επιπλέον του αναμενόμενου τραυματισμοί . Taekwondo of the decade of 1970 has shown rapid development. Since 1973 when the World Taekwondo Federation set up and took place the First International championship , sport science studies the sparring of Taekwondo. Taekwondo did not remain static as other fighting sports, it presents constant improvements on the technique, coaching and moves enrichment" (Beis, 2015) Except for improvements Taekwondo presents changes in the way of game play of the athletes which is due the change of rules. The first change was held in December 2008 in Turkey and applied on the World Cup of Taekwondo in June 2009. Ιt is given one point for a valid kick to the body, two points for a valid turning kick to the body and three points for a valid kick to the head. The result was, coaches and athletes, to adjust these changes into the training to take advantage of the competitions. Although from 2012, after the new change of rules and the use of electronic equipment, coaches have to adjust again. Due to the new rules and the style of game play of athletes, there was a differentiation in the types of injuries. Most of the athletes try to achieve the maximum of the point kicking with other ways than the past. Τhis stood as a reason to conduct the investigation below targeting with evidence to prove if the injuries actually changed together with the rules.

Published
2018

22. Weighted factors in computer-aided land leveling

Author

Zissis, Thomas S., Papadopoulos, Aristotelis H., and Teloglou, Ilias S.

Subjects
Irrigation engineering, Engineering and manufacturing industries, Science and technology
Abstract

Application of the plane method to solve land-leveling (or land-forming) problems in fields, even with irregular shapes, can easily be done by using computer programs. However, the introduction of the weighted factor, associated to each node of a grid system overlapping the whole area, is necessary to give a different weight to the elevations of nodes in the proximity of the field boundaries. Therefore, the actual cut and fill depths can be computed. In this study, a procedure is presented that can be used first for an automated generation of a system of grid squares, and then for the automated computation of the weighted factor of each node of the grid system. In doing this, only a limited amount of input data is used, that is, the grid spacing and coordinates of the field corners.

Published
1996

27. Influence of nitrogen nutrition on yield and growth of an everbearing strawberry cultivar (cv. Evie II).

Author

Iatrou, Miltiadis and Papadopoulos, Aristotelis

Subjects
*STRAWBERRY varieties, *EFFECT of nitrogen on plants, *FRUIT yield, *PLANT growth, *PLANT nutrition
Abstract

Strawberry plants are relatively unresponsive to nitrogen (N) fertilization. Supraoptimal N application also results in excessive vegetative growth, which competes to reproductive growth. Two strawberry field experiments were conducted for two consecutive years using fertigation to investigate the effect of different nitrogen (N) application rates on yield and growth of an everbearing strawberry (cv. Evie II). N was injected weekly into the drip irrigation system at 0, 0.5, 1, 3, and 6 kg N/ha/week the first year and 0, 1, 2, and 3 kg N/ha/week the next year. Fruit yield and fruit number were not affected the first year, but were increased the second year due to N application. However, there was no effect of N nutrition on average berry weight for both years. It was concluded that N fertilization may increase yield and fruit number, but average berry weight remains unaffected. [ABSTRACT FROM AUTHOR]

Published
2016
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28. Influence of nitrogen nutrition on nitrate levels of strawberry leaf blades and petioles.

Author

Iatrou, Miltiadis and Papadopoulos, Aristotelis

Subjects
*PLANT nutrition, *HYDROPONICS, *EXPERIMENTAL agriculture, *COMPOSITION of leaves, *NITROGEN
Abstract

Hydroponic and field experiments were conducted to assess the optimum nitrogen (N) levels in strawberry leaves for the appropriate management of its N nutrition under field or protected cultivation. Unlike the common view that leaf petiole is the right plant organ to sample for strawberries, the study showed that the leaf blade, of the most recently fully expanded leaf, is more responsive and therefore a better indicator of the N supply changes in the strawberry plant. This was attributed to the distinctive characteristic of strawberry plants to accumulate high concentrations of nitrates in leaf blades when there is luxury consumption of N. [ABSTRACT FROM AUTHOR]

Published
2016
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33. THE EFFECT OF ZEOLITES ON HEAVY METAL PHYTOAVAILABILITY TO RAPHANUS SATIVUS, L. IN THE PRESENCE OF SLUDGE.

Author

Xardalias, Christos, Kalavrouziotis, Ioannis K., Koukoulakis, Prodromos, Papadopoulos, Aristotelis, and Fourniotis, Nikolaos Th.

Abstract

A greenhouse pot experiment was conducted, during 2011-2012 using a Randomized Block Design, including nine zeolite treatment levels, i.e.: Control, 0.40, 0.80, 1.20, 1.60, 2.00, 2.40, 2.80, 3.20 t/ha, respectively, in the presence of a standard level of sludge (43 t/ha), in four replications. Radish (Raphanus sativus, L) var. radicula was used as an experimental test plant. The aim was to study the effect of zeolite on phytoavailability of heavy metals added to soil via sludge. It was found that the Zeolite treatments decreased statistically significantly the availability of Ni, Cd and Co to plants, decreased the heavy metal soil pollution level assessed by the Elemental Pollution Index (EPI), and Pollution Load Index (PU), respectively, and increased significantly the essential micronutrients Cu and Zn, and the Radish root yield at the early harvest, but its effect on the later harvest was not statistically significant. [ABSTRACT FROM AUTHOR]

Published
2013

34. A FUZZY MODEL FOR THE DETERMINATION OF THE SUITABILITY OF A GIVEN AREA FOR VITIS VINIFERA L. CULTIVATION.

Author

Skarlatos, Anastasios, Kalavrouziotis, Ioannis, Skarlatos, Dimitris, and Papadopoulos, Aristotelis

Abstract

A Mamdani fuzzy logic model for the determination of the suitability class of a given area for the cultivation of Vitis vinifera L. was established. A large number of parameters that influence the growth of V. vifera L. were taken into account. The inputs of the model were classified into four classes: (i) concentration of soil macroelements, (ii) concentration of soil microelements, (iii) soil properties, and (iv) local values. Each class formed a fuzzy logic sub- model whose output is an input of the main model. The final output of the model is a single number in the range 0 (not at all suitable) to 1 (excellent). The model was applied to ten sites of a greatest area located in Northern Greece, and it was found that, from the suitability point of view, all the studied sites were rated from 0.42 to 0.57 of the above scale. [ABSTRACT FROM AUTHOR]

Published
2013

35. THE INFLUENCE OF DIFFERENT DRIP IRRIGATION LAYOUT DESIGNS ON SUGAR BEET YIELD AND THEIR CONTRIBUTION TO ENVIRONMENTAL SUSTAINABILITY.

Author

Dioudis, Paschalis, Filintas, Agathos, Papadopoulos, Aristotelis, and Sakellariou-Makrantonaki, Maria

Abstract

Drip irrigation may constitute a method for sustainable management of water resources and can contribute to environmental protection and sustainability. However, there is still limited information on the application of drip irrigation to row field crops in Mediterranean environments, especially with respect to its appropriate lateral layout, a parameter that affects initiat system installation cost as well as water use efficiency. Surface drip irrigation (SDI) field experiments with sugar beets (Beta vulgaris L.) were conducted in central Greece over a 3-year period to determine the effects of different layout designs (4 treatments with 6 replications) on root yield, sucrose accumulation characteristics (percent sugar content of roots (POL), raw sugar yield), water productivity index (WPI), and to study the contribution of different layout designs to environmental protection and sustainability. The treatments used consist of combinations of drip-pipes with varying lateral distances of every-other-furrow (e-o-f) (1.00 m) and every-three- furrows (e-t-f) (1.50 m), and between the dripper spacing (0.50 m and 0.75 m). The mean root yield results in the e-o-f treatments were 108.46, 111.46 and 105.11 t∙ha-1, and in the e-t-f treatments were 106.17, 113.59 and 103.84 t∙ha-1 for each year, respectively. The root sugar contents varied from 11.68% to 13.00% in e-o-f and from 11.46% to 13.41% in e-t-f. The WPI results were 19.74, 19.44 and 17.97 kg∙m-3 in e-o- f, and 19.32, 19.81 and 17.75 kg∙m-3 in e-t-f, respectively. Differences in root yield, POL, raw sugar yield and WPI between the 3 harvest periods were not statistically significant (p<0.05). Therefore, in agricultural Mediterranean areas with aquic soil moisture regimes, the suggested lay-out design of e-t-f (1.5 m x 0.75 m) instead of the common farmers' layout of e-o-f (1.0 m x 0.50 m) can be applied without statistically significant differences in root yield, POL, raw sugar yield or WPI, and with considerable plastic material reduction (-33.3% polyethylene), which corresponds to an initial cost reduction of -37.2%. Moreover, using this method, important installation labour savings, as well as cost reductions for transportation and storage facilities, are realized. [ABSTRACT FROM AUTHOR]

Published
2010

36. APPLYING THE VIRTUAL WATER CONCEPT AT REGIONAL LEVEL: THE EXAMPLE OF THESSALY (GREECE).

Author

Prochaska, Charikleia, Dioudis, Paschalis, Papadopoulos, Aristotelis, and Grohmann, Andreas

Abstract

The present study brings out the recent concepts of virtual water and virtual water trade, and applies the bottom-up approach for the estimation of regional virtual water trade balance. Thessaly, the principal agricultural region of Greece and the area that suffers the most from water-scarcity, is used as an example, where such estimation can serve as an alternative for water saving. The agricultural sector in Thessaly is responsible for 1,600 × 106 m³ of water consumption per year, which equals Israel's annual water demand. The results of Thessaly's virtual water regarding main agricultural crops produced in 2005 showed that Thessaly exported 1,189 × 106 m³, but imported 36 × 106 m³ of virtual water in this year. Thus, Thessaly exploits its water resources, principally through agricultural activity, by producing and exporting agricultural products, mainly industrial crops and cereals, which require a lot of water in order to be produced, and imports goods fundamentally, arable crops, vegetables and olive groves, whose water needs are not so elevated. If Thessaly imported cotton instead of exporting it and produced more vegetables and arable crops, rather than importing them, the pressure on the water resources would have been reduced, at least by 34%. Thus, virtual water can serve as an alternative for water saving in regions such as Thessaly. However, to reach both significant water saving and environmental sustainability at the regional level, virtual water should be regarded in relation with the implementation of sustainable farming and sustainable water use. [ABSTRACT FROM AUTHOR]

Published
2008

37. THERMAL STRATIFICATION IN WASTEWATER STABILIZATION PONDS UNDER TEMPERATE CLIMATIC CONDITION.

Author

Papadopoulos, Aristotelis, Papagianopoulou, Areti, Parissopoulos, George, Papadopoulos, Frantzis, and Metaxa, Irene

Abstract

Seasonal and diurnal variations of water temperature and dissolved oxygen (DO) were investigated in a pilot Wastewater Stabilization Pond (WSP) system, under temperate climatic conditions, in Thessaloniki, Greece. The system consisted of an anaerobic pond followed by two lines of stabilization ponds, operating in parallel, one with recirculation (Line B) and the other without recirculation (Line A). Each line of stabilization ponds contained one facultative (Al, BI) and two maturation ponds (A2, A3, B2, B3), in series. Measurements showed that the ponds stratified and destratified intermittently, depending primarily on weather. Line A was continuously stratified during several days and nights, while Line B was stratified during the day and mixed during the night, due mainly to recirculation. Thus, the resulting temperature gradients were significantly lower in Line B than in Line A, throughout the experiment. Thermal stratification reduced vertical mixing, affecting DO variably. Its variations follow the diurnal cycle of sunlight intensity, reaching a maximum near midday, and ranging from anoxia to super-saturation, within less than 2.0 m depth. Information on pond stratification can be used to define the time and depth of sampling, necessary for the WSP performance evaluation, as well as to plan the effluent discharge program. [ABSTRACT FROM AUTHOR]

Published
2007

38. SAND FILTRATION OF NATURALLY TREATED WASTEWATER FOR IRRIGATION REUSE.

Author

Papadopoulos, Frantzis, Papadopoulos, Aristotelis, Parissopoulos, George, Zdragas, Antonis, and Metaxa, Irene

Abstract

The performance of a slow sand-filter was evaluated in a pilot-scale wastewater stabilization pond system, near Thessaloniki city, in Greece. Samples were taken over a period of 3 years, and the efficiency for irrigation reuse was determined based on TSS, BUD5, pH and FC measurements. Sand filtration reduced the TSS, BOD5 and pH values, up to 16%, 25% and 5%, respectively, thus resulting in their highly significant improvement. Simple linear models were determined to predict TSS, BOD5 and pH at the sand-filter outlet. During the irrigation period, TSS values were less than 50 mg/L (70% of the outlet values). For drip irrigation, however, an additional filtration was necessary to guarantee a constant effluent quality under this limit. BOD5 and pH were less than 15 mg O2/L and 8.5 (75% and 95% of the measurements), thus resulting in satisfactory levels for irrigation. Sand-filter operation had no influence on FC concentration during winter period, while a rise, up to 2 log units, was observed in summer, thus reaching the limit of 1000 FC/100 ml. Disinfection was necessary to meet the stipulated effluent standards for unrestricted agricultural use. [ABSTRACT FROM AUTHOR]

Published
2007

39. THE TREATMENT OF SEPTAGE USING STABILIZATION PONDS.

Author

Papadopoulos, Frantzis, Papadopoulos, Aristotelis, Parissopoulos, George, Zdragas, Antonis, and Metaxa, Irene

Abstract

Septage treatment using stabilization ponds in areas with no sewage network was examined in an experiment carried out in the wastewater treatment plant of the National Agricultural Research Foundation (N.AG.RE.F.) at Thessaloniki, during September 2004 to October 2005. The original system had four ponds in a row - one anaerobic pond followed by three stabilization ponds, with an average flow of 50 m3/day. The domestic septage was transported by tank truck to the treatment system. The efficiency of the system was estimated by measuring the BOD5, TSS, pH, TC and E. coli. Supplying the anaerobic pond with septage proved to be problematic. Its use was, therefore, discontinued. The final total reduction of BOD5, TSS, TC and E. coli was 92%, 66%, 99.68% and 99.78%, respectively. The pH value fluctuated between 7.1-7.9, higher values appearing at the plant outlet. The septage showed no variation from the urban waste- water with regard to its BOD5 value. Differences in the BOD5 were observed in their treated effluents due to the removal of the anaerobic pond from the septage treatment system. Climatic changes did not significantly affect the BOD5 of the septage. However, differences due to climatic changes were observed in the BOD5 of the treated septage. [ABSTRACT FROM AUTHOR]

Published
2007

40. EFFECTS OF MUNICIPAL RECLAIMED WASTEWATER ON THE MACRO AND MICROELEMENT STATUS OF SOIL AND PLANTS.

Author

Kalavrouziotis, Ioannis K., Kanatas, Panagiotis I., Papadopoulos, Aristotelis H., Bladenopoulou, Sofia, Koukoulakis, Prodromos H., and Leotsinides, Michael N.

Abstract

The effects of repeated applications of Municipal Reclaimed Wastewater (MRWW), compared to that of normal irrigation water, on the macro and microelement status of a clay loam (CL) soil and the plants were studied in a randomized block design in a greenhouse of the Department of Environmental and Natural Resources Management, Ioannina University, Agrinion-Greece. The soil was cultivated with onion (Alium cepa) and lettuce (Lactuca sativa). The planting of lettuce and sowing of onions was done early in March 2004, and the growth period lasted till the beginning of June (end of irrigation period). Soil and plant samples were taken three weeks after planting and at the end of the growth period. Normal irrigation water, MRWW, soil, and plant samples were analyzed, and the data obtained were accordingly studied. The following effects were found: The macro and microelements accumulated in the soil and plants to varying degree, depending on the kind of element and plant. Among macro-elements, the highest accumulation, mainly in the soil and less in the plants, was that of P, while the accumulation of K was rather limited. Among microelements, Mn accumulated mostly in the soil, whereas Cu mainly in lettuce roots, and secondly in leaves and seeds, but not in the onion plants. Also Zn accumulated mainly in lettuce seeds. The content of macro and micronutrients of the studied plants was mostly directly related to their respective accumulation in the soil. This relationship, however, was modified by: (a) the size of the element's accumulation in the soil, (b) the physical characteristics of the soil, (c) the interaction among the accumulated elements, (d) and the genotypical characteristics of the plants. [ABSTRACT FROM AUTHOR]

Published
2005

41. MACRO- AND MICRONUTRIENT INTERACTIONS IN SOIL UNDER THE EFFECT OF Brassica oleracea var. Italica, IRRIGATED WITH TREATED MUNICIPAL WASTE WATER.

Author

Kalavrouziotis, loannis K., Koukoulakis, Prodromos H., Robolas, Panagiotis, Papadopoulos, Aristotelis H., and Pantazis, Vasilios

Abstract

The effect of treated municipal wastewater on the interactions of essential plant nutrients was studied in an experiment of randomized block design. The experimental design included the following treatments: a-treated municipal wastewater (TMWW), b-fresh irrigation water denoted as "control" being repeated in six replications with a total of 12 plots of 2.5mx1.8m=4.5m2 size. Brassica oleracea var. Italica (Broccoli) was used as a test crop. The data obtained was statistically processed by ANOVA, t-test and regression analysis, and the following was found: - The significant "two-way" interactions which take place in soil under the effect of TMWW were as follows: CaxFe, CuxP, MgxNi, FexCo, MnxNi, and FexNi. - Depending on the antagonistic or synergistic character, the interactions may variably affect the fertility of the soil by the respective decrease or increase of the level of the interacting plant nutrients. - Some of the interactions may reflect important environmental implications, e.g. CaxFe, CuxP, as they can possibly be used to abate soil pollution due to toxic levels of metals. The effect of TMWW on these interactions was generally non significant in comparison to that of the control, suggesting that it could successfully be used for the irrigation of vegetables, provided the health protection measures are carefully taken. [ABSTRACT FROM AUTHOR]

Published
2008

43. PRELIMINARY RESULTS FOR STANDARDIZATION OF NDVI USING SOIL NITRATES IN CORN GROWING.

Author

Papadopoulos, Aristotelis, Iatrou, Miltiadis, Papadopoulos, Frantzis, Metaxa, Irene, Theodoridou, Sofia, Kalogeropoulos, Konstantinos, and Kiparissi, Stauroula

Abstract

A convenient method for quick mapping of crop nitrogen (N) status over large areas is the use of unmanned aerial vehicles (UAV). Estimating plant nitrogen status by remote sensing can be a useful tool in the timely diagnosis of nitrogen deficiency or sufficiency within a field and, as a result, lead to the optimization of nitrogen fertilizer inputs. In a well-fertilized area, the Sufficiency Index (SI) values, i.e. the ratio of the Normalized Difference Vegetation Index (NDVI) divided by the NDVI value of the well-fertilized area (NDVIref), can be determined. This procedure is necessary for calibration of the remote sensing data. In Greece however, the small size of the field parcels limits the implementation of UAV's. Thus, a simple equation was derived for indirect determination of the NDVIref measurement in corn using soil nitrates as follows: Soil NO3-N = 35.18 SI2.561, R2 = 0.51 (1). The NDVIref then can be calculated by dividing the mean NDVI value measured by the field parcel using the remote sensor to the SI value measured by equation (1) according to the following equation NDVIref = NDVI/SI. Finally, a quadratic function has been determined in order to translate SI values to N fertilization of corn: SI = 0.655 + 0.002(N rate) - 0.000003(N rate)2, R2 = 0.60. [ABSTRACT FROM AUTHOR]

Published
2014

44. Two years later: Is the SARS-CoV-2 pandemic still having an impact on emergency surgery? An international cross-sectional survey among WSES members

Author

Reichert, Martin, Sartelli, Massimo, Weigand, Markus A, Hecker, Matthias, Oppelt, Philip U, Noll, Julia, Askevold, Ingolf H, Liese, Juliane, Padberg, Winfried, Coccolini, Federico, Catena, Fausto, Hecker, Andreas, Adam Peckham-Cooper, Adrian Camacho-Ortiz, Aikaterini T. Mastoraki, Aitor Landaluce-Olavarria, Ajay Kumar Pal, Akira Kuriyama, Alain Chichom-Mefire, Alberto Porcu, Aleix Martínez-Pérez, Aleksandar R. Karamarkovic, Aleksei V. Osipov, Alessandro Coppola, Alessandro Cucchetti, Alessandro Spolini, Alessio Giordano, Alexander Reinisch-Liese, Alfie J. Kavalakat, Alin Vasilescu, Amin Alamin, Amit Gupta, Ana Maria Dascalu, Ana-Maria Musina, Anargyros Bakopoulos, Andee Dzulkarnaen Zakaria, Andras Vereczkei, Andrea Balla, Andrea Bottari, Andreas Baumann, Andreas Fette, Andrey Litvin, Aniella Katharina Reichert, Anna Guariniello, Anna Paspala, Anne-Sophie Schneck, Antonio Brillantino, Antonio Pesce, Arda Isik, Ari Kalevi Leppäniemi, Aristeidis Papadopoulos, Aristotelis Kechagias, Ashraf Yehya Abdalla Mohamed, Ashrarur Rahman Mitul, Athanasios Marinis, Athanasios Syllaios, Baris Mantoglu, Belinda De Simone, Benjamin Stefan Weiss, Bernd Pösentrup, Biagio Picardi, Biagio Zampogna, Boris Eugeniev Sakakushev, Boyko Chavdarov Atanasov, Bruno Nardo, Bulent Calik, Camilla Cremonini, Carlos A. Ordoñez, Charalampos Seretis, Chiara Cascone, Christos Chouliaras, Cino Bendinelli, Claudia Lopes, Claudio Guerci, Clemens Weber, Constantinos Nastos, Cristian Mesina, Damiano Caputo, Damien Massalou, Davide Cavaliere, Deborah A. McNamara, Demetrios Demetriades, Desirè Pantalone, Diego Coletta, Diego Sasia, Diego Visconti, Dieter G. Weber, Diletta Corallino, Dimitrios Chatzipetris, Dimitrios K. Manatakis, Dimitrios Ntourakis, Dimitrios Papaconstantinou, Dimitrios Schizas, Dimosthenis Chrysikos, Dmitry Mikhailovich Adamovich, Doaa Elkafrawy, Dragos Seban, Edgar Fernando Hernandez García, Edoardo Baldini, Edoardo Picetti, Edward C. T. H. Tan, Efstratia Baili, Eftychios Lostoridis, Elena Adelina Toma, Elif Colak, Elisabetta Cerutti, Elmin Steyn, Elmuiz A. Hsabo, Emmanouil Ioannis Kapetanakis, Emmanouil Kaouras, Emmanuel Schneck, Emrah Akin, Emre Gonullu, Enes çelik, Enrico Cicuttin, Enrico Pinotti, Erik Johnsson, Ernest E. Moore, Ervis Agastra, Evgeni Nikolaev Dimitrov, Ewen A. Griffiths, Fabrizio D’Acapito, Federica Saraceno, Felipe Alconchel, Felix Alexander Zeppernick, Fernando Machado Rodríguez, Fikri Abu-Zidan, Francesca Pecchini, Francesco Favi, Francesco Ferrara, Francesco Fleres, Francesco Pata, Francesco Pietro Maria Roscio, Francesk Mulita, Frank J. M. F. Dor, Fredrik Linder, Gabriel Dimofte, Gabriel Rodrigues, Gabriela Nita, Gabriele Sganga, Gennaro Martines, Gennaro Mazzarella, Gennaro Perrone, George Velmahos, Georgios D. Lianos, Gia Tomadze, Gian Luca Baiocchi, Giancarlo D’Ambrosio, Gianluca Pellino, Gianmaria Casoni Pattacini, Giorgio Giraudo, Giorgio Lisi, Giovanni Domenico Tebala, Giovanni Pirozzolo, Giulia Montori, Giulio Argenio, Giuseppe Brisinda, Giuseppe Currò, Giuseppe Giuliani, Giuseppe Palomba, Giuseppe Roscitano, Gökhan Avşar, Goran Augustin, Guglielmo Clarizia, Gustavo M. Machain Vega, Gustavo P. Fraga, Harsheet Sethi, Hazim Abdulnassir Eltyeb, Helmut A. Segovia Lohse, Herald René Segovia Lohse, Hüseyin Bayhan, Hytham K. S. Hamid, Igor A. Kryvoruchko, Immacolata Iannone, Imtiaz Wani, Ioannis I. Lazaridis, Ioannis Katsaros, Ioannis Nikolopoulos, Ionut Negoi, Isabella Reccia, Isidoro Di Carlo, Iyiade Olatunde Olaoye, Jacek Czepiel, Jae Il Kim, Jeremy Meyer, Jesus Manuel Saenz Terrazas, Joel Noutakdie Tochie, Joseph M. Galante, Justin Davies, Kapil Sugand, Kebebe Bekele Gonfa, Kemal Rasa, Kenneth Y. Y. Kok, Konstantinos G. Apostolou, Konstantinos Lasithiotakis, Konstantinos Tsekouras, Kumar Angamuthu, Lali Akhmeteli, Larysa Sydorchuk, Laura Fortuna, Leandro Siragusa, Leonardo Pagani, Leonardo Solaini, Lisa A. Miller, Lovenish Bains, Luca Ansaloni, Luca Ferrario, Luigi Bonavina, Luigi Conti, Luis Antonio Buonomo, Luis Tallon-Aguilar, Lukas Tomczyk, Lukas Werner Widmer, Maciej Walędziak, Mahir Gachabayov, Maloni M. Bulanauca, Manu L. N. G. Malbrain, Marc Maegele, Marco Catarci, Marco Ceresoli, Maria Chiara Ranucci, Maria Ioanna Antonopoulou, Maria Papadoliopoulou, Maria Rosaria Valenti, Maria Sotiropoulou, Mario D’Oria, Mario Serradilla Martín, Markus Hirschburger, Massimiliano Veroux, Massimo Fantoni, Matteo Nardi, Matti Tolonen, Mauro Montuori, Mauro Podda, Maximilian Scheiterle, Maximos Frountzas, Mehmet Sarıkaya, Mehmet Yildirim, Michael Bender, Michail Vailas, Michel Teuben, Michela Campanelli, Michele Ammendola, Michele Malerba, Michele Pisano, Mihaela Pertea, Mihail Slavchev, Mika Ukkonen, Miklosh Bala, Mircea Chirica, Mirko Barone, Mohamed Maher Shaat, Mohammed Jibreel Suliman Mohammed, Mona Awad Akasha Abuelgasim, Monika Gureh, Mouaqit Ouadii, Mujdat Balkan, Mumin Mohamed, Musluh Hakseven, Natalia Velenciuc, Nicola Cillara, Nicola de’Angelis, Nicolò Tamini, Nikolaos J. Zavras, Nikolaos Machairas, Nikolaos Michalopoulos, Nikolaos N. Koliakos, Nikolaos Pararas, Noel E. Donlon, Noushif Medappil, Offir Ben-Ishay, Olmi Stefano, Omar Islam, Ömer Tammo, Orestis Ioannidis, Oscar Aparicio, Oussama Baraket, Pankaj Kumar, Pasquale Cianci, Per Örtenwall, Petar Angelov Uchikov, Philip de Reuver, Philip F. Stahel, Philip S. Barie, Micaela Piccoli, Piotr Major, Pradeep H. Navsaria, Prakash Kumar Sasmal, Raul Coimbra, Razrim Rahim, Recayi Çapoğlu, Renol M. Koshy, Ricardo Alessandro Teixeira Gonsaga, Riccardo Pertile, Rifat Ramadan Mussa Mohamed, Rıza Deryol, Robert G. Sawyer, Roberta Angelico, Roberta Ragozzino, Roberto Bini, Roberto Cammarata, Rosa Scaramuzzo, Rossella Gioco, Ruslan Sydorchuk, Salma Ahmed, Salomone Di Saverio, Sameh Hany Emile, Samir Delibegovic, Sanjay Marwah, Savvas Symeonidis, Scott G. Thomas, Sebahattin Demir, Selmy S. Awad, Semra Demirli Atici, Serge Chooklin, Serhat Meric, Sevcan Sarıkaya, Sharfuddin Chowdhury, Shaza Faycal Mirghani, Sherry M. Wren, Simone Gargarella, Simone Rossi Del Monte, Sofia Esposito, Sofia Xenaki, Soliman Fayez Ghedan Mohamed, Solomon Gurmu Beka, Sorinel Lunca, Spiros G. Delis, Spyridon Dritsas, Stefan Morarasu, Stefano Magnone, Stefano Rossi, Stefanos Bitsianis, Stylianos Kykalos, Suman Baral, Sumita A. Jain, Syed Muhammad Ali, Tadeja Pintar, Tania Triantafyllou, Tarik Delko, Teresa Perra, Theodoros A. Sidiropoulos, Thomas M. Scalea, Tim Oliver Vilz, Timothy Craig Hardcastle, Tongporn Wannatoop, Torsten Herzog, Tushar Subhadarshan Mishra, Ugo Boggi, Valentin Calu, Valentina Tomajer, Vanni Agnoletti, Varut Lohsiriwat, Victor Kong, Virginia Durán Muñoz-Cruzado, Vishal G. Shelat, Vladimir Khokha, Wagih Mommtaz Ghannam, Walter L. Biffl, Wietse Zuidema, Yasin Kara, Yoshiro Kobe, Zaza Demetrashvili, Ziad A. Memish, Zoilo Madrazo, Zsolt J. Balogh, Zulfu Bayhan, Surgery, AMS - Musculoskeletal Health, Other Research, APH - Quality of Care, Reichert, Martin, Sartelli, Massimo, Weigand, Markus A, Hecker, Matthia, Oppelt, Philip U, Noll, Julia, Askevold, Ingolf H, Liese, Juliane, Padberg, Winfried, Coccolini, Federico, Catena, Fausto, Hecker, Andrea, Adam Peckham-Cooper, Adrian Camacho-Ortiz, Aikaterini T. Mastoraki, Aitor Landaluce-Olavarria, Ajay Kumar Pal, Akira Kuriyama, Alain Chichom-Mefire, Alberto Porcu, Aleix Martínez-Pérez, Aleksandar R. Karamarkovic, Aleksei V. Osipov, Alessandro Coppola, Alessandro Cucchetti, Alessandro Spolini, Alessio Giordano, Alexander Reinisch-Liese, Alfie J. Kavalakat, Alin Vasilescu, Amin Alamin, Amit Gupta, Ana Maria Dascalu, Ana-Maria Musina, Anargyros Bakopoulos, Andee Dzulkarnaen Zakaria, Andras Vereczkei, Andrea Balla, Andrea Bottari, Andreas Baumann, Andreas Fette, Andrey Litvin, Aniella Katharina Reichert, Anna Guariniello, Anna Paspala, Anne-Sophie Schneck, Antonio Brillantino, Antonio Pesce, Arda Isik, Ari Kalevi Leppäniemi, Aristeidis Papadopoulos, Aristotelis Kechagias, Ashraf Yehya Abdalla Mohamed, Ashrarur Rahman Mitul, Athanasios Marinis, Athanasios Syllaios, Baris Mantoglu, Belinda De Simone, Benjamin Stefan Weiss, Bernd Pösentrup, Biagio Picardi, Biagio Zampogna, Boris Eugeniev Sakakushev, Boyko Chavdarov Atanasov, Bruno Nardo, Bulent Calik, Camilla Cremonini, Carlos A. Ordoñez, Charalampos Seretis, Chiara Cascone, Christos Chouliaras, Cino Bendinelli, Claudia Lopes, Claudio Guerci, Clemens Weber, Constantinos Nastos, Cristian Mesina, Damiano Caputo, Damien Massalou, Davide Cavaliere, Deborah A. McNamara, Demetrios Demetriades, Desirè Pantalone, Diego Coletta, Diego Sasia, Diego Visconti, Dieter G. Weber, Diletta Corallino, Dimitrios Chatzipetris, Dimitrios K. Manatakis, Dimitrios Ntourakis, Dimitrios Papaconstantinou, Dimitrios Schizas, Dimosthenis Chrysikos, Dmitry Mikhailovich Adamovich, Doaa Elkafrawy, Dragos Seban, Edgar Fernando Hernandez García, Edoardo Baldini, Edoardo Picetti, Edward C. T. H. Tan, Efstratia Baili, Eftychios Lostoridis, Elena Adelina Toma, Elif Colak, Elisabetta Cerutti, Elmin Steyn, Elmuiz A. Hsabo, Emmanouil Ioannis Kapetanakis, Emmanouil Kaouras, Emmanuel Schneck, Emrah Akin, Emre Gonullu, Enes çelik, Enrico Cicuttin, Enrico Pinotti, Erik Johnsson, Ernest E. Moore, Ervis Agastra, Evgeni Nikolaev Dimitrov, Ewen A. Griffiths, Fabrizio D’Acapito, Federica Saraceno, Felipe Alconchel, Felix Alexander Zeppernick, Fernando Machado Rodríguez, Fikri Abu-Zidan, Francesca Pecchini, Francesco Favi, Francesco Ferrara, Francesco Fleres, Francesco Pata, Francesco Pietro Maria Roscio, Francesk Mulita, Frank J. M. F. Dor, Fredrik Linder, Gabriel Dimofte, Gabriel Rodrigues, Gabriela Nita, Gabriele Sganga, Gennaro Martines, Gennaro Mazzarella, Gennaro Perrone, George Velmahos, Georgios D. Lianos, Gia Tomadze, Gian Luca Baiocchi, Giancarlo D’Ambrosio, Gianluca Pellino, Gianmaria Casoni Pattacini, Giorgio Giraudo, Giorgio Lisi, Giovanni Domenico Tebala, Giovanni Pirozzolo, Giulia Montori, Giulio Argenio, Giuseppe Brisinda, Giuseppe Currò, Giuseppe Giuliani, Giuseppe Palomba, Giuseppe Roscitano, Gökhan Avşar, Goran Augustin, Guglielmo Clarizia, Gustavo M. Machain Vega, Gustavo P. Fraga, Harsheet Sethi, Hazim Abdulnassir Eltyeb, Helmut A. Segovia Lohse, Herald René Segovia Lohse, Hüseyin Bayhan, Hytham K. S. Hamid, Igor A. Kryvoruchko, Immacolata Iannone, Imtiaz Wani, Ioannis I. Lazaridis, Ioannis Katsaros, Ioannis Nikolopoulos, Ionut Negoi, Isabella Reccia, Isidoro Di Carlo, Iyiade Olatunde Olaoye, Jacek Czepiel, Jae Il Kim, Jeremy Meyer, Jesus Manuel Saenz Terrazas, Joel Noutakdie Tochie, Joseph M. Galante, Justin Davies, Kapil Sugand, Kebebe Bekele Gonfa, Kemal Rasa, Kenneth Y. Y. Kok, Konstantinos G. Apostolou, Konstantinos Lasithiotakis, Konstantinos Tsekouras, Kumar Angamuthu, Lali Akhmeteli, Larysa Sydorchuk, Laura Fortuna, Leandro Siragusa, Leonardo Pagani, Leonardo Solaini, Lisa A. Miller, Lovenish Bains, Luca Ansaloni, Luca Ferrario, Luigi Bonavina, Luigi Conti, Luis Antonio Buonomo, Luis Tallon-Aguilar, Lukas Tomczyk, Lukas Werner Widmer, Maciej Walędziak, Mahir Gachabayov, Maloni M. Bulanauca, Manu L. N. G. Malbrain, Marc Maegele, Marco Catarci, Marco Ceresoli, Maria Chiara Ranucci, Maria Ioanna Antonopoulou, Maria Papadoliopoulou, Maria Rosaria Valenti, Maria Sotiropoulou, Mario D’Oria, Mario Serradilla Martín, Markus Hirschburger, Massimiliano Veroux, Massimo Fantoni, Matteo Nardi, Matti Tolonen, Mauro Montuori, Mauro Podda, Maximilian Scheiterle, Maximos Frountzas, Mehmet Sarıkaya, Mehmet Yildirim, Michael Bender, Michail Vailas, Michel Teuben, Michela Campanelli, Michele Ammendola, Michele Malerba, Michele Pisano, Mihaela Pertea, Mihail Slavchev, Mika Ukkonen, Miklosh Bala, Mircea Chirica, Mirko Barone, Mohamed Maher Shaat, Mohammed Jibreel Suliman Mohammed, Mona Awad Akasha Abuelgasim, Monika Gureh, Mouaqit Ouadii, Mujdat Balkan, Mumin Mohamed, Musluh Hakseven, Natalia Velenciuc, Nicola Cillara, Nicola de’Angelis, Nicolò Tamini, Nikolaos J. Zavras, Nikolaos Machairas, Nikolaos Michalopoulos, Nikolaos N. Koliakos, Nikolaos Pararas, Noel E. Donlon, Noushif Medappil, Offir Ben-Ishay, Olmi Stefano, Omar Islam, Ömer Tammo, Orestis Ioannidis, Oscar Aparicio, Oussama Baraket, Pankaj Kumar, Pasquale Cianci, Per Örtenwall, Petar Angelov Uchikov, Philip de Reuver, Philip F. Stahel, Philip S. Barie, Micaela Piccoli, Piotr Major, Pradeep H. Navsaria, Prakash Kumar Sasmal, Raul Coimbra, Razrim Rahim, Recayi Çapoğlu, Renol M. Koshy, Ricardo Alessandro Teixeira Gonsaga, Riccardo Pertile, Rifat Ramadan Mussa Mohamed, Rıza Deryol, Robert G. Sawyer, Roberta Angelico, Roberta Ragozzino, Roberto Bini, Roberto Cammarata, Rosa Scaramuzzo, Rossella Gioco, Ruslan Sydorchuk, Salma Ahmed, Salomone Di Saverio, Sameh Hany Emile, Samir Delibegovic, Sanjay Marwah, Savvas Symeonidis, Scott G. Thomas, Sebahattin Demir, Selmy S. Awad, Semra Demirli Atici, Serge Chooklin, Serhat Meric, Sevcan Sarıkaya, Sharfuddin Chowdhury, Shaza Faycal Mirghani, Sherry M. Wren, Simone Gargarella, Simone Rossi Del Monte, Sofia Esposito, Sofia Xenaki, Soliman Fayez Ghedan Mohamed, Solomon Gurmu Beka, Sorinel Lunca, Spiros G. Delis, Spyridon Dritsas, Stefan Morarasu, Stefano Magnone, Stefano Rossi, Stefanos Bitsianis, Stylianos Kykalos, Suman Baral, Sumita A. Jain, Syed Muhammad Ali, Tadeja Pintar, Tania Triantafyllou, Tarik Delko, Teresa Perra, Theodoros A. Sidiropoulos, Thomas M. Scalea, Tim Oliver Vilz, Timothy Craig Hardcastle, Tongporn Wannatoop, Torsten Herzog, Tushar Subhadarshan Mishra, Ugo Boggi, Valentin Calu, Valentina Tomajer, Vanni Agnoletti, Varut Lohsiriwat, Victor Kong, Virginia Durán Muñoz-Cruzado, Vishal G. Shelat, Vladimir Khokha, Wagih Mommtaz Ghannam, Walter L. Biffl, Wietse Zuidema, Yasin Kara, Yoshiro Kobe, Zaza Demetrashvili, Ziad A. Memish, Zoilo Madrazo, Zsolt J. Balogh, Zulfu Bayhan, Reichert, M, Sartelli, M, Weigand, M, Hecker, M, Oppelt, P, Noll, J, Askevold, I, Liese, J, Padberg, W, Coccolini, F, Catena, F, Hecker, A, Peckham-Cooper, A, Camacho-Ortiz, A, Mastoraki, A, Landaluce-Olavarria, A, Pal, A, Kuriyama, A, Chichom-Mefire, A, Porcu, A, Martinez-Perez, A, Karamarkovic, A, Osipov, A, Coppola, A, Cucchetti, A, Spolini, A, Giordano, A, Reinisch-Liese, A, Kavalakat, A, Vasilescu, A, Alamin, A, Gupta, A, Dascalu, A, Musina, A, Bakopoulos, A, Zakaria, A, Vereczkei, A, Balla, A, Bottari, A, Baumann, A, Fette, A, Litvin, A, Reichert, A, Guariniello, A, Paspala, A, Schneck, A, Brillantino, A, Pesce, A, Isik, A, Leppaniemi, A, Papadopoulos, A, Kechagias, A, Mohamed, A, Mitul, A, Marinis, A, Syllaios, A, Mantoglu, B, De Simone, B, Weiss, B, Posentrup, B, Picardi, B, Zampogna, B, Sakakushev, B, Atanasov, B, Nardo, B, Calik, B, Cremonini, C, Ordonez, C, Seretis, C, Cascone, C, Chouliaras, C, Bendinelli, C, Lopes, C, Guerci, C, Weber, C, Nastos, C, Mesina, C, Caputo, D, Massalou, D, Cavaliere, D, Mcnamara, D, Demetriades, D, Pantalone, D, Coletta, D, Sasia, D, Visconti, D, Weber, D, Corallino, D, Chatzipetris, D, Manatakis, D, Ntourakis, D, Papaconstantinou, D, Schizas, D, Chrysikos, D, Adamovich, D, Elkafrawy, D, Seban, D, Garcia, E, Baldini, E, Picetti, E, Tan, E, Baili, E, Lostoridis, E, Toma, E, Colak, E, Cerutti, E, Steyn, E, Hsabo, E, Kapetanakis, E, Kaouras, E, Schneck, E, Akin, E, Gonullu, E, Celik, E, Cicuttin, E, Pinotti, E, Johnsson, E, Moore, E, Agastra, E, Dimitrov, E, Griffiths, E, D'Acapito, F, Saraceno, F, Alconchel, F, Zeppernick, F, Rodriguez, F, Abu-Zidan, F, Pecchini, F, Favi, F, Ferrara, F, Fleres, F, Pata, F, Roscio, F, Mulita, F, Dor, F, Linder, F, Dimofte, G, Rodrigues, G, Nita, G, Sganga, G, Martines, G, Mazzarella, G, Perrone, G, Velmahos, G, Lianos, G, Tomadze, G, Baiocchi, G, D'Ambrosio, G, Pellino, G, Pattacini, G, Giraudo, G, Lisi, G, Tebala, G, Pirozzolo, G, Montori, G, Argenio, G, Brisinda, G, Curro, G, Giuliani, G, Palomba, G, Roscitano, G, Avsar, G, Augustin, G, Clarizia, G, Vega, G, Fraga, G, Sethi, H, Eltyeb, H, Lohse, H, Bayhan, H, Hamid, H, Kryvoruchko, I, Iannone, I, Wani, I, Lazaridis, I, Katsaros, I, Nikolopoulos, I, Negoi, I, Reccia, I, Di Carlo, I, Olaoye, I, Czepiel, J, Kim, J, Meyer, J, Terrazas, J, Tochie, J, Galante, J, Davies, J, Sugand, K, Gonfa, K, Rasa, K, Kok, K, Apostolou, K, Lasithiotakis, K, Tsekouras, K, Angamuthu, K, Akhmeteli, L, Sydorchuk, L, Fortuna, L, Siragusa, L, Pagani, L, Solaini, L, Miller, L, Bains, L, Ansaloni, L, Ferrario, L, Bonavina, L, Conti, L, Buonomo, L, Tallon-Aguilar, L, Tomczyk, L, Widmer, L, Waledziak, M, Gachabayov, M, Bulanauca, M, Malbrain, M, Maegele, M, Catarci, M, Ceresoli, M, Ranucci, M, Antonopoulou, M, Papadoliopoulou, M, Valenti, M, Sotiropoulou, M, D'Oria, M, Martin, M, Hirschburger, M, Veroux, M, Fantoni, M, Nardi, M, Tolonen, M, Montuori, M, Podda, M, Scheiterle, M, Frountzas, M, Sarikaya, M, Yildirim, M, Bender, M, Vailas, M, Teuben, M, Campanelli, M, Ammendola, M, Malerba, M, Pisano, M, Pertea, M, Slavchev, M, Ukkonen, M, Bala, M, Chirica, M, Barone, M, Shaat, M, Mohammed, M, Abuelgasim, M, Gureh, M, Ouadii, M, Balkan, M, Mohamed, M, Hakseven, M, Velenciuc, N, Cillara, N, De'Angelis, N, Tamini, N, Zavras, N, Machairas, N, Michalopoulos, N, Koliakos, N, Pararas, N, Donlon, N, Medappil, N, Ben-Ishay, O, Stefano, O, Islam, O, Tammo, O, Ioannidis, O, Aparicio, O, Baraket, O, Kumar, P, Cianci, P, Ortenwall, P, Uchikov, P, de Reuver, P, Stahel, P, Barie, P, Piccoli, M, Major, P, Navsaria, P, Sasmal, P, Coimbra, R, Rahim, R, Capoglu, R, Koshy, R, Gonsaga, R, Pertile, R, Mohamed, R, Deryol, R, Sawyer, R, Angelico, R, Ragozzino, R, Bini, R, Cammarata, R, Scaramuzzo, R, Gioco, R, Sydorchuk, R, Ahmed, S, Di Saverio, S, Emile, S, Delibegovic, S, Marwah, S, Symeonidis, S, Thomas, S, Demir, S, Awad, S, Atici, S, Chooklin, S, Meric, S, Sarikaya, S, Chowdhury, S, Mirghani, S, Wren, S, Gargarella, S, Del Monte, S, Esposito, S, Xenaki, S, Mohamed, S, Beka, S, Lunca, S, Delis, S, Dritsas, S, Morarasu, S, Magnone, S, Rossi, S, Bitsianis, S, Kykalos, S, Baral, S, Jain, S, Ali, S, Pintar, T, Triantafyllou, T, Delko, T, Perra, T, Sidiropoulos, T, Scalea, T, Vilz, T, Hardcastle, T, Wannatoop, T, Herzog, T, Mishra, T, Boggi, U, Calu, V, Tomajer, V, Agnoletti, V, Lohsiriwat, V, Kong, V, Munoz-Cruzado, V, Shelat, V, Khokha, V, Ghannam, W, Biffl, W, Zuidema, W, Kara, Y, Kobe, Y, Demetrashvili, Z, Memish, Z, Madrazo, Z, Balogh, Z, and Bayhan, Z

Subjects
Cross-Sectional Studie, ddc:610, Capacity, Pandemic, SARS-CoV-2, COVID-19, WSES, Time to intervention, Appendicitis, Reconstructive and regenerative medicine Radboud Institute for Health Sciences [Radboudumc 10], Cross-Sectional Studies, Emergency, Quarantine, Emergency Medicine, Emergency surgery, Humans, Surgery, Appendiciti, COVID-19, SARS-CoV-2, Pandemic, Emergency surgery, Emergency, Appendicitis, WSES, Time to intervention, Capacity, Quarantine, Pandemics, Diverticulitis, Human
Abstract

Background The SARS-CoV-2 pandemic is still ongoing and a major challenge for health care services worldwide. In the first WSES COVID-19 emergency surgery survey, a strong negative impact on emergency surgery (ES) had been described already early in the pandemic situation. However, the knowledge is limited about current effects of the pandemic on patient flow through emergency rooms, daily routine and decision making in ES as well as their changes over time during the last two pandemic years. This second WSES COVID-19 emergency surgery survey investigates the impact of the SARS-CoV-2 pandemic on ES during the course of the pandemic. Methods A web survey had been distributed to medical specialists in ES during a four-week period from January 2022, investigating the impact of the pandemic on patients and septic diseases both requiring ES, structural problems due to the pandemic and time-to-intervention in ES routine. Results 367 collaborators from 59 countries responded to the survey. The majority indicated that the pandemic still significantly impacts on treatment and outcome of surgical emergency patients (83.1% and 78.5%, respectively). As reasons, the collaborators reported decreased case load in ES (44.7%), but patients presenting with more prolonged and severe diseases, especially concerning perforated appendicitis (62.1%) and diverticulitis (57.5%). Otherwise, approximately 50% of the participants still observe a delay in time-to-intervention in ES compared with the situation before the pandemic. Relevant causes leading to enlarged time-to-intervention in ES during the pandemic are persistent problems with in-hospital logistics, lacks in medical staff as well as operating room and intensive care capacities during the pandemic. This leads not only to the need for triage or transferring of ES patients to other hospitals, reported by 64.0% and 48.8% of the collaborators, respectively, but also to paradigm shifts in treatment modalities to non-operative approaches reported by 67.3% of the participants, especially in uncomplicated appendicitis, cholecystitis and multiple-recurrent diverticulitis. Conclusions The SARS-CoV-2 pandemic still significantly impacts on care and outcome of patients in ES. Well-known problems with in-hospital logistics are not sufficiently resolved by now; however, medical staff shortages and reduced capacities have been dramatically aggravated over last two pandemic years.

Published
2022
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