Search

In light of the accumulating evidence for survival benefit coming from the use of macrolides for community-acquired pneumonia (CAP), a group of experts from the field of internal medicine and infectious diseases frame a position statement on the use of macrolides for the management of bacterial CAP and for infection by the novel coronavirus (COVID-19). The statement is framed taking into consideration existing publications and own research experience. The main content of this statement is that the combination of one β-lactam and a macrolide should be the first treatment of choice for patients with severe bacterial CAP. Severity is assessed as scoring 2 or more points on the CURB65 scoring system of severity or as pneumonia severity index III to V or C-reactive protein more than 150 mg/l; the suggested macrolide is either azithromycin or clarithromycin. The experts also suggest that in COVID-19 pneumonia, the combination of one β-lactam and a macrolide should be reserved only when there is strong suspicion of bacterial co-infection. [ABSTRACT FROM AUTHOR]

This paper aims to assess the level of implementation of Green Public Procurements (GPP) in the Region of Western Macedonia—Greece, which is currently under energy transition from lignite to a RES-based energy model. By that assessment, a linkage between the GPP framework and energy transition is created, revealing the distinct GPP criteria that should be adopted by energy-transition regions, which have the potential to strengthen the transition process. Rather than implementing the total number of the GPP criteria, literature and methodology findings indicated that specific GPP criteria are directly connected to energy transition and should be primarily adopted by policymakers in comparison to the rest. These criteria are Electricity, Road Transport, Waste Water Infrastructure and Road Lighting and Traffic Signals. By assessing a sample of 31 procurement officials and scientific experts in the five major municipalities of the region, the implementation level of GPP criteria was measured average-to-low, implying that there is a considerable scope by the region's main municipal authorities to adopt them to a greater extent. Statistical correlations using Spearman's rank correlation analysis between specific GPP criteria were also identified, indicating distinct interconnections between the criteria pairs that imply commonalities in the implementation framework of GPP. The paper's implications for future research led to the identification of specific GPP criteria in the public procurement process, that have the potential to enhance green sustainability and boost energy transition. [ABSTRACT FROM AUTHOR]

Regions play an important role in the global economy by driving research and innovation policies through a major tool, the Regional Innovation System (RIS). The RIS is a social system that encompasses the systematic interaction of the various organizations that comprise it, to improve local knowledge and innovation. It consists of interconnections of various public and private sector institutions, whose activities and interactions create, introduce and diffuse innovations. This paper outlines the methodology employed in developing and validating a mathematical model of Regional Innovation Systems, utilizing the system dynamics approach. To provide a demonstration of the aforementioned concept, the proposed model will then be implemented in the RIS of two specific regions in Greece, namely Western and Central Macedonia. Within this context, various policies will be formulated to modify the indicators of Smart Technology, with the objective of assessing their influence on the overall regional development of the aforementioned regions. The model focuses on the functional structure of the RIS, separating it in six diverse, interacting subsystems consisting of different components, captured by a total of 38 different factors which can be quantitatively assessed. [ABSTRACT FROM AUTHOR]

The growing availability of smart meter data has facilitated the development of energy-saving services like demand response, personalized energy feedback, and non-intrusive-load-monitoring applications, all of which heavily rely on advanced machine learning algorithms trained on energy consumption datasets. To ensure the accuracy and reliability of these services, real-world smart meter data collection is crucial. The Plegma dataset described in this paper addresses this need bfy providing whole- house aggregate loads and appliance-level consumption measurements at 10-second intervals from 13 different households over a period of one year. It also includes environmental data such as humidity and temperature, building characteristics, demographic information, and user practice routines to enable quantitative as well as qualitative analysis. Plegma is the first high-frequency electricity measurements dataset in Greece, capturing the consumption behavior of people in the Mediterranean area who use devices not commonly included in other datasets, such as AC and electric-water boilers. The dataset comprises 218 million readings from 88 installed meters and sensors. The collected data are available in CSV format. [ABSTRACT FROM AUTHOR]

Assesses the homogenous approach and policy measures towards small and medium sized enterprises (SME), adopted by the `White Paper on Growth, Competitiveness and Employment' and by national policies in Greece. Role of SME in the Greek economy; Structural characteristics of SME; European Union policy measures in favor of SME.

This paper explores the effectiveness in the use of texture painting software packages, which are more commonly used in the film and game industries, as a method for detecting and recording carvings on non-planar surfaces. This new approach is demonstrated through a case study of the Piraeus Lion, a sculpture in Venice which has documented engravings that are subtle and have proven difficult to fully recorded and interpret using traditional approaches. Through the creation of a new digital documentation of the Piraeus Lion using Structure from Motion, the model was processed using existing methods and other experimental visualisation techniques. The outputs from these were then compared to the those from two software, Substance Painter and Mari. These software packages helped to visualise the carvings and showed that the method has potential for a wide range of uses, both within epigraphy and other fields of study relating to carvings on stone including rock art and runology. The presented method is intended to be used alongside existing digital and analogue methods as a tool for annotating, evaluating, and discovering new carvings in their original context. In particular, Substance Painter offers a repeatable, easy to use, and intuitive solution to creating easily distributable visualisations and annotated models. [ABSTRACT FROM AUTHOR]

Quantum mechanics (QM) is derived based on a universe composed solely of events, for example, outcomes of observables. Such an event universe is represented by a dendrogram (a finite tree) and in the limit of infinitely many events by the p-adic tree. The trees are endowed with an ultrametric expressing hierarchical relationships between events. All events are coupled through the tree structure. Such a holistic picture of event-processes was formalized within the Dendrographic Hologram Theory (DHT). The present paper is devoted to the emergence of QM from DHT. We used the generalization of the QM-emergence scheme developed by Smolin. Following this scheme, we did not quantize events but rather the differences between them and through analytic derivation arrived at Bohmian mechanics. We remark that, although Bohmian mechanics is not the main stream approach to quantum physics, it describes adequately all quantum experiments. Previously, we were able to embed the basic elements of general relativity (GR) into DHT, and now after Smolin-like quantization of DHT, we can take a step toward quantization of GR. Finally, we remark that DHT is nonlocal in the treelike geometry, but this nonlocality refers to relational nonlocality in the space of events and not Einstein's spatial nonlocality. By shifting from spatial nonlocality to relational we make Bohmian mechanics less exotic. [ABSTRACT FROM AUTHOR]

This paper aims to enlarge our understanding of how the creative industries affect an economy's innovation activities both by developing and introducing innovations as part of their business activities and stimulating innovation in other sectors. It applies a two-stage analysis. As to the first stage, it attempts to identify the innovation determinants of creative firms considering several characteristics of their founders and employees and different types of knowledge sources. In the second stage, the paper seeks to explore whether and how creative firms' innovative output helps their business clients from other (creative or non-creative) industries to innovate accounting for endogeneity issues. Our analysis is based on more than 1000 firms operating in various creative industries in 5 European countries (Italy, UK, Sweden, Denmark, Greece). The main findings in the first stage of the analysis suggest that younger founders and employees with creativity expertise are significantly associated with an increased probability of creative firms introducing both product and process innovation. In the second stage of analysis, we provide strong empirical evidence that creative industries support innovation in the wider economy. We show that the innovation output of creative firms constitutes a crucial input for the innovativeness of their business clients from other (creative or non-creative) industries. [ABSTRACT FROM AUTHOR]

This paper examines the spillover effects transmission mechanism between oil prices, oil price uncertainty and oil price volatility on labour market in Greece, using static and dynamic quantile connectedness methodology (Diebold and Yilmaz Diebold and Yilmaz, Int J Forecast 28:57–66, 2012; Ando et al. Ando T, Greenwood-Nimmo N, Shin Y (2018) 'Quantile connectedness: Modelling tail behavior in the topology of financial networks', Working Paper. https://ssrn.com/abstract=3164772.). There is empirical evidence that the oil price variable is the most influential node of the energy variables on hirings and firings, suggesting the endogeneity of the labour market variables. Rolling estimation analysis based on the quantile VAR to capture the volatility spillovers across the whole conditional distribution shows a large variation of the total connectedness index, which is responsive to exogenous adverse and beneficial shocks. Further, our results point to a strong effect due to the COVID-19 pandemic and the state intervention to sustain the pandemic on the labour market. Overall, the analysis reveals a substantial higher time-varying connectedness of the system at the tails of the distribution, indicating that changes in energy markets asymmetrically affect the Greek labour market in recessionary and flourishing states of the economy, rather than normal times. [ABSTRACT FROM AUTHOR]

We examine the drivers of research performance of 1431 economists from six European countries. Data from the Scopus database are collected. We compare the relative performance of economists from three northern European countries: Belgium, Denmark and Germany with three from the south: Greece, Italy and Portugal. Relative performance is measured as the deviation from the country average in both citations and papers. The dependent variables take the value of 1 if the productivity of the researcher is above the country average and 0 if it is below. Probit/logit analysis is employed and marginal effects are estimated to examine the significance of factors like the country of their PhD studies, gender and inbreeding at the national level. A US PhD or a German PhD affects negatively the relative productivity of German economists. Inbreeding at the national level (locally trained economists) reduces productivity among Greek, Italian and Portuguese economists. Gender is significant in the case of Denmark, Germany and Italy, but it does not affect productivity in Belgium, Greece and Portugal. [ABSTRACT FROM AUTHOR]

An exceptional chain of events in science, technology, art and planning took place in Latin America in the 1970s. Does this wonder shed light upon our view of the basic roots of cultural, social and political blooming? This paper intends to adduce evidence on second-order cybernetics processes underlying five outstanding cases in real societies and to disclose the links between democracy and unfettering momentum for freedom and creativity. Namely, Oscar Varsavsky, national projects, styles of development, scientific and technological autonomy; Stefano Varese, cultural and political autonomy of indigenous people; Mario Pedrosa, creation of the Museum of Solidarity in Chile; Stafford Beer, Cybersyn project for cybernetics and self-management in Chile; and Humberto Maturana, concepts of autopoiesis, cognition, language and multiverse. The reasoning counts with the author's direct participation in all cases. The paper sets a similarity worthy of being noticed between Allende's Unidad Popular in Chile and Pericles' Golden Age in Greece and outlines why these historic realms albeit far apart have lasting importance and similar historical impetus. Highlights the essential and seminal features of each stream and comes to the conclusion that effective democracy is the necessary condition for participation and creativity. Upsurges in social participation and creativity are neither frequent nor cyclical. Still, such sudden and usually large increase in ingenuity, flair and aim to improve living conditions, although limited in time, remain in our mind as a joy forever. Nowadays, the world witnesses a contrary motion towards sterile art patterns and restrained behaviour. Hence, it becomes even more important to better understand the basic roots of cultural, social and political blooming. [ABSTRACT FROM AUTHOR]

Copyright of Advances in Atmospheric Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper examines the critical role of Mega Infrastructure Projects in sustainable urban and peripheral development by presenting a Sustainable Infrastructure Serum Analysis supported by primary field research. In the Athens Metro case study, we examined the project's impact on sustainable development by analysing the opinions of the project's users. As a result, the Athens Metro serves as a case study to help us better understand sustainable infrastructure as a framework for green growth from the standpoint of society. The three pillars of sustainable development are inextricably linked. This study focuses on the social comprehension and acceptance of a Mega Infrastructure Project effects. We attempt to demonstrate the interdependence of the three pillars of sustainable development through public opinion responses to our research by developing a statistical model fed by public responses to a prototype questionnaire that we developed to support our research objectives. The study's findings highlighted the project's social acceptability and necessity by establishing a direct positive correlation between sustainability, society, the economy, and the environment from the standpoint of society. [ABSTRACT FROM AUTHOR]

In this paper the relative efficiency of the forest sector of 28 EU/EFTA countries during the period 2010–2015 is assessed using Data Envelopment Analysis (DEA). Three non-discretionary inputs (persons employed, forest available for wood supply and initial growing stock) are considered. The outputs are roundwood production, gross value added and final growing stock. The proposed DEA model not only computes efficiency scores but also improvement targets. The countries with the lowest efficiency scores during the period under study are Greece, Bulgaria and Italy. In the second stage, a fractional regression model is fitted and the factors that have an influence on the estimated efficiency are identified. The factors that have an influence are GDP and belonging to the NORTH Europe and CENTRAL-WEST Europe regions. Quantitative estimates of the partial effects of these factors are provided. The results can contribute in providing guidance towards the best practice in roundwood production. [ABSTRACT FROM AUTHOR]

The considerable relevant size of the tourism sector for some economies, together with this sector's vulnerability to CC, renders this study an insightful aid to tourism demand forecasting. The paper applies a pooled mean group (PMG) model to identify climate parameters that affect tourism demand. Then, it continues with an input–output table analysis to show the transmission effects of CC on each component of the tourism sector. The PMG model imposes homogeneity on the long-run coefficients and while less restrictive, it is more efficient than other methods of the same family. The estimated gravity equation enables comparisons of the baseline scenario with various different scenarios of CC and finds how tourist arrivals could be affected up to 2080. Our results suggest that there is mostly a positive relationship of the squared difference of temperature and precipitation between Greece and tourist origin countries. Our findings also suggest that CC could lead to a fall in Greek GDP between 1.79 and 2.61%. We believe that our findings will help design appropriate policy actions that may offset or alleviate these negative future negative impacts of CC. [ABSTRACT FROM AUTHOR]

Macroeconomic changes such as economic depression and stock market crashes can have an impact on private life, mood and attitudes toward individuals and, by this, on the macroeconomy. This paper deals with the mental health indicators depression and grief as a result of economic and financial crises. For this purpose, it refers to the seminal five phases of crisis response well known from psychology and applies them to the setting of Greece since the start of the most recent crisis. In this context, we differentiate between investors and the "normal" population and deal with important feedback effects from lower mental health to the macroeconomy. Finally, as these feedback effects tend to lead even deeper into macroeconomic trouble, a vicious cycle cannot be excluded given these findings. The paper also generalizes its considerations to the case of mental health effects of economic crises beyond the Greek case. [ABSTRACT FROM AUTHOR]

The specific features and requirements of island regions and rural areas make Mobility as a Service (MaaS) an attractive and evolving concept in the realm of Intercity/Rural/Island transportation. The primary goal of this research is to provide qualitative insights relative to the added value and development of MaaS for the previously mentioned transport services through a case study from Greece, a country with approximately 250 inhabited islands. In island settings, the primary societal motivation for MaaS is to enhance the accessibility of islands and improve individuals' access to multiple transport services. MaaS is found to have a strong potential to act as an enabler for more efficient transport and better accessibility to remote/island locations, acting in a complementary manner with currently applied "external" measures such as the Greek "Transport Equivalent". To further assess the potential, development and impact of MaaS a focus group comprised by key-representatives from industry and academia stakeholders is created. The MaaS Ecosystem, as described by the experts, is comprised of the MaaS Provider, all the intercity/rural/island transport providers currently operating in the Greek market, MaaS Enabling entities (associations, regulators, investors, research institutions), the Integration Drivers and the customers. The issue of transport providers' liability in case of disruptions and existing market regulations constitute, according to the results, an important challenge towards development of an Intercity MaaS, which needs to be addressed by legislative studies in a pan-European level. Most likely user groups for Intercity/Rural/Island MaaS are young people and digitally educated people, whilst less likely patronage groups are the elderly and "vulnerable" population groups. Relative to the external environment, high degree of fragmentation of the intercity transport industry combined by "autonomous" behavior of actors ("silo effect") appears to be the greatest threat towards MaaS whilst anticipated capital investments in infrastructure and vehicles, which are foreseen in the proxime future, are the greatest opportunities. [ABSTRACT FROM AUTHOR]

The consumption of fermented foods has become an important dietary strategy to improve human health, and today, they account for a significant share in the international food market, with special emphasis on traditional or ethnic foods. Among fermented foods, table olives have a key position in the dietary preference of consumers around the Mediterranean basin and beyond. Greece has a long tradition in the production of table olives according to local craft-based processing methods. However, an extensive effort has been undertaken in the last decade to modernize the table olive industry and adopt scientifically based processing methods to produce the final products of high quality and consistency. During processing, the majority of components present in raw olives are transformed to render the product edible. Among these components, phenolic compounds have significant functional properties that may enhance the nutritional value of the final product. This review paper provides an up-to-date overview regarding the transformation of phenolic compounds during processing of the most economically important varieties of Greek table olives, including Halkidiki green olives, Kalamata and Conservolea natural black olives, and Thassos natural black dry-salted olives. The functional and antioxidant potential of Greek table olive varieties as well as their nutritional implications are also discussed. [ABSTRACT FROM AUTHOR]

It is widely known that both geography and institutions determine the location of an investment. However, little is known about the impact of these factors on entrepreneurs' future business plans. Using a questionnaire survey, this paper examines whether the 'first-' and 'second-nature' geography and institutions affect the plans of entrepreneurs to expand or sell their businesses in Greece. The analysis shows that entrepreneurs intend to expand their businesses when the importance of the country's relative geographical location to the international market increases, but that of localisation economies decreases. There is also evidence that entrepreneurs aim to sell their businesses to domestic investors when sea access, the natural environment, the agglomeration economies, the location of Greece and the local governance are ideal for the business performance in the country. [ABSTRACT FROM AUTHOR]

Aiming to illuminate the effects of enforced confinements on people's lives, this paper presents a novel dataset that measures human behaviour holistically and longitudinally during the COVID-19 outbreak. In particular, we conducted a study during the first wave of the lockdown, where 21 healthy subjects from the Netherlands and Greece participated, collecting multimodal raw and processed data from smartphone sensors, activity trackers, and users' responses to digital questionnaires. The study lasted more than two months, although the duration of the data collection varies per participant. The data are publicly available and can be used to model human behaviour in a broad sense as the dataset explores physical, social, emotional, and cognitive domains. The dataset offers an exemplary perspective on a given group of people that could be considered to build new models for investigating behaviour changes as a consequence of the lockdown. Importantly, to our knowledge, this is the first dataset combining passive sensing, experience sampling, and virtual assistants to study human behaviour dynamics in a prolonged lockdown situation. Measurement(s) 'human behaviour during the COVID-19 outbreak', 'human behaviour', 'physical behaviour', 'social behaviour', 'emotional behaviour', 'cognitive behaviour' Technology Type(s) 'smartphone device', 'activity tracker', 'digital questionnaires' Sample Characteristic - Organism 'human beings' Sample Characteristic - Location 'The Netherlands', 'Greece' [ABSTRACT FROM AUTHOR]

In this paper we investigate the role of debt as an additional determinant of growth complementing the relevant empirical growth literature using insights gained during the recent economic crisis. Our focus is the case of Greece, the country more severely affected by the crisis, thus having to resort to tripartite external assistance. More specifically, we are exploring whether the pillars of the Troika Adjustment Programme for Greece could actually be the key to overcome the current deadlock the Greek economy, as the required fiscal consolidation resulted in deep and prolonged recession which in turn jeopardizes the sustainability of the improvement in general government accounts. The Troika Programme for Greece featured specific structural reforms as a prerequisite to improve the business environment and enhance the outward orientation of the Greek economy, thus identifying investment (domestic and foreign) and international competiveness as the new growth drivers of the Greek economy. Using panel data for EU countries we are investigating the validity of the proposed economic policy mix, placing special emphasis on the role that indebtedness (both private and public) has played in the past and could also play in the future (as public debt is ruled out for financing investment but credit expansion to the private sector through increased liquidity is a sine qua non condition for the recovery of investment). The innovation of this study is that it takes stock of both structural reforms (through PMI) and indebtedness and estimates their relevant impact on growth. [ABSTRACT FROM AUTHOR]

Ubiquitous self-tracking technologies have penetrated various aspects of our lives, from physical and mental health monitoring to fitness and entertainment. Yet, limited data exist on the association between in the wild large-scale physical activity patterns, sleep, stress, and overall health, and behavioral and psychological patterns due to challenges in collecting and releasing such datasets, including waning user engagement or privacy considerations. In this paper, we present the LifeSnaps dataset, a multi-modal, longitudinal, and geographically-distributed dataset containing a plethora of anthropological data, collected unobtrusively for the total course of more than 4 months by n = 71 participants. LifeSnaps contains more than 35 different data types from second to daily granularity, totaling more than 71 M rows of data. The participants contributed their data through validated surveys, ecological momentary assessments, and a Fitbit Sense smartwatch and consented to make these data available to empower future research. We envision that releasing this large-scale dataset of multi-modal real-world data will open novel research opportunities and potential applications in multiple disciplines. Measurement(s) Step Unit of Distance • Nutrition, Calories • Physical Activity Measurement • Oxygen Saturation Measurement • maximal oxygen uptake measurement • Electrocardiography • Respiratory Rate • skin temperature sensor • Unit of Length • Very Light Exercise • heart rate variability measurement • resting heart rate • electrodermal activity measurement • State-Trait Anxiety Inventory • Positive and Negative Affect Schedule • Stages and Processes of Change • Behavioural Regulations in Exercise • 50-item International Personality Item Pool version of the Big Five Markers Technology Type(s) FitBit • Survey • Survey Sample Characteristic - Organism Homo sapiens Sample Characteristic - Environment anthropogenic habitat Sample Characteristic - Location Greece • Italy • Sweden • Cyprus [ABSTRACT FROM AUTHOR]

Emergency Departments (EDs) are the most overcrowded places in public hospitals. Machine learning can support decisions on effective ED resource management by accurately forecasting the number of ED visits. In addition, Explainable Artificial Intelligence (XAI) techniques can help explain decisions from forecasting models and address challenges like lack of trust in machine learning results. The objective of this paper is to use machine learning and XAI to forecast and explain the ED visits on the next on duty day. Towards this end, a case study is presented that uses the XGBoost algorithm to create a model that forecasts the number of patient visits to the ED of the University Hospital of Ioannina in Greece, based on historical data from patient visits, time-based data, dates of holidays and special events, and weather data. The SHapley Additive exPlanations (SHAP) framework is used to explain the model. The evaluation of the forecasting model resulted in an MAE value of 18.37, revealing a more accurate model than the baseline, with an MAE of 29.38. The number of patient visits is mostly affected by the day of the week of the on duty day, the mean number of visits in the previous four on duty days, and the maximum daily temperature. The results of this work can help policy makers in healthcare make more accurate and transparent decisions that increase the trust of people affected by them (e.g., medical staff). [ABSTRACT FROM AUTHOR]

Aristino-Traianoupolis area hosts one of the most significant water-dominated low-temperature geothermal fields in Greece. It is located on the southwestern uplifted margin of the Tertiary Evros Delta molassic basin, 10 km east of the town of Alexandroupolis (Thrace, NE Greece). The upper hydrothermal system of the Aristino Geothermal Field (AGF), one of the most promising in continental Greece, contains fluids with temperatures ranging from 51 to 99 °C, within a series of overlapping aquifers at very low depths (100–430 m). The main geothermal anomaly for temperatures higher than 90 °C covers an area of 6 km2, to a maximum prospected depth of 500 m below ground surface. The scattered regional anomaly exceeds 50 km2 and is characterized by excessively high and abruptly changing thermal gradient (42 to 450 °C/km) and heat flow (80–800 mW/m2), that are both typical of a fault-controlled hydrothermal system. Since 1993, the AGF has undergone non-systematic geothermal investigation, with emphasis on low-depth (100–500 m) drilling. This paper provides, for the first time, a synthetic and detailed evaluation of all available temperature data gathered in the last 25 years. The steady-state temperature logs reveal the dominant role of conduction for the upper geothermal system, accompanied, in most cases, by rapidly changing and abnormally high thermal gradients (100–450 °C/km), triggered, most probably, by a deeper system of higher temperature. This hypothesis is also supported by the applied chemical geothermometers, which suggest initial fluid temperatures at 140–150 °C, the hydrochemical characteristics of the fluids hosted in the deeper and most promising investigated reservoir (ignimbrite) of the upper system, and the extrapolated temperatures from the conductive temperature–depth profiles. The lower widespread medium enthalpy hydrothermal system should extend at depths 500–1000 m within volcanics and the expected Eocene limestones and basal clastic series of the Tertiary sequence that have filled the basin. Nevertheless, these assumptions need to be verified by appropriate investigations and new drillings at depths greater than 600–700 m, which would confirm the presence of a productive medium enthalpy reservoir. [ABSTRACT FROM AUTHOR]

Age-at-death estimation of adult skeletal remains is a key part of biological profile estimation, yet it remains problematic for several reasons. One of them may be the subjective nature of the evaluation of age-related changes, or the fact that the human eye is unable to detect all the relevant surface changes. We have several aims: (1) to validate already existing computer models for age estimation; (2) to propose our own expert system based on computational approaches to eliminate the factor of subjectivity and to use the full potential of surface changes on an articulation area; and (3) to determine what age range the pubic symphysis is useful for age estimation. A sample of 483 3D representations of the pubic symphyseal surfaces from the ossa coxae of adult individuals coming from four European (two from Portugal, one from Switzerland and Greece) and one Asian (Thailand) identified skeletal collections was used. A validation of published algorithms showed very high error in our dataset—the Mean Absolute Error (MAE) ranged from 16.2 and 25.1 years. Two completely new approaches were proposed in this paper: SASS (Simple Automated Symphyseal Surface-based) and AANNESS (Advanced Automated Neural Network-grounded Extended Symphyseal Surface-based), whose MAE values are 11.7 and 10.6 years, respectively. Lastly, it was demonstrated that our models could estimate the age-at-death using the pubic symphysis over the entire adult age range. The proposed models offer objective age estimates with low estimation error (compared to traditional visual methods) and are able to estimate age using the pubic symphysis across the entire adult age range. [ABSTRACT FROM AUTHOR]

Land disputes are among the primary issues that Land Administration Systems attempt to accommodate. They derive from a variety of purposes including law, history, culture, traditions, administration and local geographical characteristics. There is no uniform approach in addressing land disputes and each country implements different resolution techniques. Ecclesiastical and monastic institutions throughout the world are owners of immense real estate property to such an extent that can indeed affect land administration policies. Greece is in the limelight of international attention due to its economical crisis and actually under pressure to modernise its dysfunctional land policy framework and create a stable investment environment. Within this framework, this paper investigates issues hindering proper land administration in Greece through the examination of a the resolving process regarding a case study in the island of Crete; a complex legal land dispute between the Greek State, two ecclesiastical institutions, a monastery and a church, and squatters took place, lasting for nearly 40 years. In order to evaluate this procedure and its impact on the development of the disputed area, a variety of data sources were accumulated and processed through time-based analysis. In this direction, cadastral survey's contribution was examined along with land use change analysis, indicating how uncertainties in securing property rights on land, result in illegalities and trespassing posing significant barriers in land administration and management in the course of time. Although old and ambiguous in describing land boundaries the monasterial documentation might be, it proved sufficient to prevail over other litigants claims; the monastery was even adjudicated more than twice the size of the area that was claiming. By this investigation process, the distinct role of ecclesiastical institutions in Greece regarding land acquisition and the defects and malfunctions within Greek Land Administration System are presented. The paper concludes with the authors' suggestions for addressing similar real estate property situations concerning land disputes. [ABSTRACT FROM AUTHOR]

The article discusses the highlights of the 1st International Symposium and 10th Balkan Conference on Operational Research (BALCOR 2011) held in Thessaloniki, Greece, in September 2011. The event was attended by researchers and practitioners across the fields of statistics, mathematics, economics, engineering, computer science and information technology. They presented papers on a variety of topics including the effect of contextual variables on technical efficiency.

In this paper, a crack detection mechanism for concrete tunnel surfaces is presented. The proposed methodology leverages deep Convolutional Neural Networks and domain-specific heuristic post-processing techniques to address a variety of challenges, including high accuracy requirements, low operational times and limited hardware resources, poor and variable lighting conditions, low textured lining surfaces, scarcity of training data, and abundance of noise. The proposed framework leverages the representational power of the convolutional layers of CNNs, which inherently selects effective features, thus obviating the need for the tedious task of handcrafted feature extraction. Additionally, the good performance rates attained by the proposed framework are acquired at a significantly lower execution time compared to other techniques. The presented mechanism was designed and developed as a core component of an autonomous robotic inspector deployed and validated in the tunnels of Egnatia Motorway in Metsovo, Greece. The obtained results denote the proposed approach's superiority over a variety of methods and suggest a promising potential as a driver of autonomous concrete-lining tunnel-inspection robots. [ABSTRACT FROM AUTHOR]

The paper presents a set of empirical regularities that characterize the activity of Greek exporters. Using a unique data set of Greek manufacturing firms with firm-level exports, credit scores and other financial variables for the 2003–2015 period, we find that export value increases with the firm's size, labour productivity, the skill premium of wages and the employment ratio in research and development activities. Moreover, the results indicate that less credit-constrained Greek exporters with higher credit scores export more. [ABSTRACT FROM AUTHOR]

Dive tourism has been growing constantly in recent years, contributing to socio-economic development of coastal zones and islands. In Greece new users are attracted, while coastal communities seek to create marine infrastructure, such as diving parks. Within this context, this paper deals with issues of diving park location. More specifically, it attempts to propose a methodology by identifying marine typologies and classify them according to specific criteria favourable or not to the location of diving parks. Rhodes island is chosen for the empirical part of the study, since the island's local economy is based on sea tourism. Marine typologies are identified based on selected criteria, and the marine space is classified according to favourable characteristics of the location of the diving park. The results indicate that, due to the significant human-induced activities in the marine environment, the potential dive locations are significantly reduced, underlining the risk of sea use conflicts and emerging the need of MSP implementation. [ABSTRACT FROM AUTHOR]

This paper investigates the market structure of the Greek manufacturing industry over the period 1984-2007 at the two-digit SIC level. Three models are used to investigate the competitive conditions of the manufacturing industry. The paper investigates factors affecting the markup of the Greek manufacturing industry by estimating two additional models, i.e., the markup cross-sectional model and the markup time-series model, for identifying both sectoral and intertemporal factors. The empirical results indicate that the whole Greek manufacturing industry, as well as each sector of the industry, operates in non-competitive conditions for each year during the period 1984-2007. The findings also support that labor intensity, the sector size, and the number of establishments influence the markup at the sectoral level, while labor intensity, and the growth and the number of establishments affect the markup over time. [ABSTRACT FROM AUTHOR]

Health expenditure data are known to be afflicted by restricted range, zero values, skewness and kurtosis. Several methods for modelling such data have been suggested in the literature to cope with these problems. This paper compares the performance of several alternative estimators, including two-part models and generalised linear models. The dependent variable is household expenditure on health care in Greece, a country where out-of-pocket health expenditure is higher than anywhere else in the European Union, whether as a proportion of GDP, as a share of all health spending, or in per capita terms. To facilitate comparison of model performance, household health expenditure is examined in two different specifications: expenditure on all health care (where zero values are rare) and expenditure on hospital services alone (where zero values are common). In the case of expenditure on all health care, three of the estimators performed almost equally well in terms of three alternative model performance indicators: a modified two-part model with non-linear least squares in the second part, a constant-variance generalised linear model and a variance-proportional-to-mean generalised linear model. In the case of expenditure on hospital services, the constant-variance generalised linear model out-performed the rest. The findings suggest that no estimator is best under all circumstances, while most alternative estimators are likely to produce relatively similar results. The paper concludes by discussing implications for further research. [ABSTRACT FROM AUTHOR]

This paper deals with the post-fire regeneration of Pinus halepensis Mill. ecosystems in the Sithonia peninsula in northern Greece. The pre-burning stands consisted of two storeys; the overstorey of the dominant tree species P. halepensis and the understorey of evergreen sclerophyllous shrubs. The wildfire took place in June 1994. Three months after the fire two experimental plots of 0.75 ha each were established on a northeastern and a southwestern facing slope. In each experimental plot different restoration treatments were applied by using P. halepensis reproductive material. The treatments were the following: (i) planting of paper- pot seedlings, (ii) planting of bare-root seedlings, (iii) seeding in patches, (iv) seeding in strips, (v) seeding in strips and lines. The results of these treatments were compared to the control (no treatment applied). The results showed that all applied restoration works accelerated the rate of regeneration, while the best results were obtained by the method of planting paper-pot seedlings. [ABSTRACT FROM AUTHOR]

Corporate Social Responsibility (CSR) becomes popular as big international firms gain more power than states and global issues engender concerns to people from all over the world. The pandemic of novel coronavirus is a current issue of global concern that threats humanity and global economy since the end of 2019. A lot of firms have announced urgent actions to support their employees and the local communities. The present study aims to examine whether the CSR activities of firms due to the pandemic could be categorized either as strategical or tactical CSR. The researcher recognizes the formation of a new kind of CSR called critical CSR as a hybrid between tactical and strategical CSR sharing characteristics from both. The examination of the case of Greece during the pandemic has provided a variety of examples of CSR activities from big Greek international firms that have been processed to support the validity of the reasoning. Finally, the paper delineates this new universal form of CSR born under the critical circumstances of the pandemic and the ensuing economic recession. That fact proves that this crisis could be transformed into a chance for corporations to realize their social role and improve their CSR footprint with the learnings of this pandemic by underlining possible advantages of these urgent CSR actions that could be incorporated into the usual CSR policy of the firms. [ABSTRACT FROM AUTHOR]

Recent advances in remote sensing techniques and computer algorithms allow accurate, abundant, and high-resolution geometric information retrieval for rock mass characterization from 3D point clouds. The automatic application of the extracted information for local scale rockfall susceptibility assessment, where discontinuities characteristics play a major role in rocky slope stability, requires step by step logical procedures. This paper presents a novel methodology to use the extracted discontinuity set characteristics for a local scale rockfall susceptibility assessment, tailored for Uncrewed Aerial Vehicle (UAV) data acquisition. The method consists of 4 steps: (i) 3D slope model reconstruction using UAV digital photogrammetry, (ii) automatic characterization of discontinuity sets, (iii) slope stability analysis, and (iv) susceptibility assessment using a new Rockfall Susceptibility Index. The proposed method was applied to a road cut rocky slope in a mountainous area of the Samaria National Park, in Crete Island, Greece. Visual validation indicates that the areas of higher and moderate rockfall susceptibility on the 3D model of the rocky slope are adjacent to rockfall source areas marked by the presence of fallen blocks on the foot of the slope. The proposed methodological workflow presents novelties related to the use of point clouds for the estimation of the Rock Quality Designation (RQD) index, the visualization of discontinuity set spacing, the evaluation of the persistence and the Slope Mass Rating (SMR) index, as well as the incorporation of the persistence of overhangs into the rockfall susceptibility assessment and visualization. [ABSTRACT FROM AUTHOR]

In deltaic areas, riverine and coastal waters interact; hence, these highly dynamic environments are particularly sensitive to climate change. This adds to existing anthropogenic pressures from irrigated agriculture, industrial infrastructure, urbanization, and touristic activities. The paper investigates the estimated future variations in the dynamics of surface and coastal water resources at a Mediterranean deltaic environment for the twenty-first century. Therefore, an Integrated Deltaic Risk Index (IDRI) is proposed as a vulnerability assessment tool to identify climate change impact (CCI) on the study area. For this purpose, three regional climate models (RCM) are used with representative concentration pathways (RCPs) 4.5 and 8.5 for short-term (2021–2050) and long-term (2071–2100) future periods. Extensive numerical modeling of river hydrology, storm surges, coastal inundation, water scarcity, and heat stress on irrigated agriculture is combined with available atmospheric data to estimate CCI on the Nestos river delta (Greece). The IDRI integrates modeling results about (i) freshwater availability covering agricultural demands for three water consumption scenarios, i.e., a reference (REF), a climate change (CC), and an extended irrigation (EXT) scenario, combining river discharges and hydropower dam operation; (ii) inundated coastal areas due to storm surges; and (iii) heat stress on cultivated crops. Sustainable practices on irrigated agriculture and established river basin management plans are also considered for the water demands under combinatory scenarios. The differentiations of model outputs driven by various RCM/RCP combinations are investigated. Increased deltaic vulnerability is found under the RCP8.5 scenario especially for the long-term future period. The projected IDRI demonstrates the need for integrated water resources management when compared with risk indexing of individual water processes in the study area. [ABSTRACT FROM AUTHOR]

This paper constructs a dynamic model in which fiscal restrictions interact with government borrowing and default. The government faces fiscal constraints; it cannot adjust tax rates or impose lump-sum taxes on the private sector, but it can adjust public consumption and foreign debt. When foreign debt is sufficiently high, however, the government can choose to default to increase domestic public and private consumption by freeing up the resources used to pay the debt. Two types of defaults arise in this environment: fiscal defaults and aggregate defaults. Fiscal defaults occur because of the government's inability to raise tax revenues. Aggregate defaults occur even if the government could raise tax revenues; debt is simply too high to be sustainable. In a quantitative exercise calibrated to Greece, we find that our model can predict the recent default, but that increasing taxes would not have prevented it. In fact, increasing taxes would have made the recession deeper because of the distortionary effects of taxation. [ABSTRACT FROM AUTHOR]

Aviation is a basic necessity of our world, but its contribution to air pollution is considered significant. In this paper, the contribution of air traffic to air pollution levels in the area of the three larger airports of Greece is examined through the use of EDMS (Emission and Dispersion Modeling System), a regulatory model proposed by the US EPA (United States Environmental Protection Agency). To ensure a better understanding of air traffic contribution to air quality levels, the hourly aircraft movements along with the corresponding meteorological data for a whole year, 2009, were taken into account. During this year, air traffic peaked both in Greece as a total and in each of the three airports of this work. Airport emissions calculated by EDMS are found to be in good agreement with emissions monitored at Athens International Airport as well as with emission results and published data for International Zurich Airport. Concentration results have shown that PM10 and SO2 concentrations are well below the limit values, whereas NO2 concentrations exceeding limit value are expected in small areas under specific circumstances, when heavy air traffic coincides with meteorological conditions favoring air pollutant accumulation. Finally, the comparison of computational results with monitoring air quality data shows a good agreement, if other sources of air pollution are excluded. [ABSTRACT FROM AUTHOR]

Sustainable forest management should be pursued in all public forests of the EU countries, as this constitutes a legal requirement within the frame of the FOREST EUROPE policy. However, the forest management sustainability assessment process is a complex task, mainly because it involves integration of multiple environmental, socio-economic and institutional impacts at different spatial scales of different forest management policies, which are considered for implementation at any forest location. Moreover, the conflicts and interests of the various stakeholders related to the forest resources should be included in the assessment process. Much of the on-going research, therefore, focuses on the development of tools that can facilitate the integration of the different type of forest resource impacts and conflicts towards achievement of forest management sustainability. This paper presents a multi-criteria approach, which combined spatial analysis, Geographic Information Systems (GIS), the Analytic Hierarchy Process (AHP), spatially referenced impact indicator models for pairwise comparisons, the fuzzy extent analysis, fuzzy preference programming and the ideal solution concept in order to assess the performance of forest management sustainability at regional level. The combined multi-criteria approach was successfully implemented to the forests of Eastern Macedonia and Thrace Region in northern Greece through the operation of the National Forest Governance Council. Seven forest management policies were subjected to sustainability assessment and an Overall Forest Sustainability Performance Index (OFSPI) was calculated for each one of them. The final ranking of the forest management policies was based on their OFSPI values. Furthermore, sensitivity analysis was conducted to explore robustness of the final solution. [ABSTRACT FROM AUTHOR]

The paper examines settlements and mobility of their population; it examines the seasonal relocations of population of a specific area of Greece in the past when this type of relocations were systematic. It identifies settlements with seasonal migrations and outlines all interrelations between migration and settlement. A particular typology of the settlements is developed based on the character of the seasonal abandonment of the area source data originate from the census taken during the time studied. The percentage of population changes for each settlement reveals its character as regards the seasonal abandonment of the village; the results are mapped with the assistance of an appropriate geo-information system. The results of the mapping determine the area where historical transport routes are expected to be found. Additionally, they identify an area of further research into the socio-economic structure of the settlements and the cultural landscapes. The results complement the available literature and the research in subjects relating to the transportation of populations in the framework of human geography and dynamics in the framework of settlement geography. The typology of the settlements can contribute to the investigation of modern or historical phenomena of mobility and their depiction in the geographical space. [ABSTRACT FROM AUTHOR]

Classic of Changes is a Chinese cultural classic born more than 3000 years ago. Its profound philosophical thoughts and the use of divination have brought Classic of Changes to a strong oriental mysticism. The view of the heaven and man of yin and yang and the five elements states of Classic of Changes are completely different from the Western elemental theory of ancient Greece. The latter gave birth to classical and modern scientific theories, and the yin and yang and the eight trigrams symbol has become synonymous with oriental mysticism. In fact, the cosmology of the Holism of Classic of Changes is a precious scientific heritage of mankind. The axiomatization of the symbolic formal system of Classic of Changes aims to unveil the veil of oriental mysticism and provide oriental wisdom for the development of modern science. Transforming the symbolic system of Classic of Changes into a formal axiom system is the crystallization of the fusion of wisdom between the East and the West. The axiomatization of the symbolic formal system of Classic of Changes shows that the oriental and the western scientific tradition harmony but not sameness and there is no conflict. Classic of Changes can also be interpreted by the axiomatic system like Euclid's Elements. The main contribution of this paper is that the author skillfully uses mathematical language to formulate the system of Classic of Changes, reconstructs the ideological system of Classic of Changes with the axiomatic method and realizes the scientificalization of Chinese classical natural philosophy. The formal axiom system of Classic of Changes may give us such a revelation: the gap between the oriental and western scientific traditions is mainly in the axiomatization, but the lack of oriental scientific tradition may be the bottleneck of the development of modern science. [ABSTRACT FROM AUTHOR]

The aim of this paper is to study the main macroeconomic, financial and structural factors that shaped current account developments in Greece over the period from 1960 to 2007 and discuss these developments in relation to the issue of external sustainability. Concerns over Greece's external sustainability have emerged since 1999 when the current account deficit widened substantially and exhibited high persistence. The empirical model used, which theoretically rests on the intertemporal approach, treats the current account as the gap between domestic saving and investment. We examine the behaviour of the current account in the long run and the short run using co-integration analysis and a variety of econometric tests to account for the effect of significant structural changes in the period under review. We find that a stable equilibrium current account model can be derived if the ratio of private sector financing to GDP, as a proxy for financial liberalisation, is included in the specification. Policy options to restore the country's external sustainability are explored based on the estimated equilibrium model. [ABSTRACT FROM AUTHOR]

When dealing with the ecological, social and economic impacts of climate change, it is important for each country to formulate and implement mitigation and adaptation measures. In this context, the present paper examines the application of the contingent valuation method (CVM) for the monetary estimation of the Greek national mitigation and adaptation climate change costs. To this purpose, the CVM in this case study has been applied to the Greek climate change experts only as, theoretically, they represent the most informed part of Greek society in technical and economic aspects of the climate change. Therefore, the findings of this paper express strictly the opinions of the national experts and are not representative of the general population. The monetary estimates include the experts’ WTP for mitigation and adaptation measures as well as their preferences on that percentage of the national GDP that should be funding such measures at the present as well as the future time-scale. In addition, questions concerning the political and institutional climate change settings are included in the survey, providing a more comprehensive socioeconomic analysis in this particular study. [ABSTRACT FROM AUTHOR]

Recent work by archaeologists emphasized the contributions of archaeological fieldwork to the study of post-classical Greece. This marks a significant departure from traditional approaches to the archaeology of Byzantium that tended to focus on art historical methods and architectural history. Despite these changes in the study of post-classical Greece, the issues of abandonment, continuity and change continue to play an important role both in ongoing debates and will undoubtedly influence future research priorities. Only collaboration among scholars who study historical archaeology in Greece and elsewhere will ensure the continued relevance of this field even as these long-standing debates wane in relevance. [ABSTRACT FROM AUTHOR]

The enactment of the Water Framework Directive (WFD) initiated scientific efforts to develop reliable methods for comparing prevailing lake conditions against reference (or nonimpaired) states, using the state of a set biological elements. Drawing a distinction between impaired and natural conditions can be a challenging exercise. Another important aspect is to ensure that water quality assessment is comparable among the different Member States. In this context, the present paper offers a constructive critique of the practices followed during the WFD implementation in Greece by pinpointing methodological weaknesses and knowledge gaps that undermine our ability to classify the ecological quality of Greek lakes. One of the pillars of WDF is a valid lake typology that sets ecological standards transcending geographic regions and national boundaries. The national typology of Greek lakes has failed to take into account essential components. WFD compliance assessments based on the descriptions of phytoplankton communities are oversimplified and as such should be revisited. Exclusion of most chroococcal species from the analysis of cyanobacteria biovolume in Greek lakes/reservoirs and most reservoirs in Spain, Portugal, and Cyprus is not consistent with the distribution of those taxa in lakes. Similarly, the total biovolume reference values and the indices used in classification schemes reflect misunderstandings of WFD core principles. This hampers the comparability of ecological status across Europe and leads to quality standards that are too relaxed to provide an efficient target for the protection of Greek/transboundary lakes such as the ancient Lake Megali Prespa. [ABSTRACT FROM AUTHOR]

This paper studies the existence of asymmetries and the presence of a causal relationship between social benefits and social contributions in Greece over the period 1999Q1–2016Q4 using threshold cointegration estimation techniques (TAR and MTAR models) and asymmetric error-correction model estimation. In doing so the study applies conventional and quantile unit root tests to examine the order of integration of the variables. The empirical results support the hypothesis that social benefits and social contributions are cointegrated with threshold adjustment and the adjustment process is asymmetric both in the short and long run. ECM model estimation indicates that the response of the government to a worsening budget is significantly larger than to an improving budget, and the adjustment path towards momentum equilibrium takes place through social contributions, when the budget is in its negative phase (below threshold). Granger causality tests and distributed lag asymmetry tests indicate that social benefits represent an exogenous variable. [ABSTRACT FROM AUTHOR]

This paper presents a comparative sensitivity analysis of six of the widely used human thermal comfort indices. The analysis consists of the evaluation of the effect of indices 'input parameters' variation and change rate on the output of human energy balance and simple thermohygrometric indices. For the implementation of the sensitivity analysis, the generalized additive model's methodology is applied on a long period and high temporal resolution dataset from Athens, Greece. The results indicate that the proposed methodology of generalized additive models is adequate for such an analysis. Moreover, this research revealed the differences in index behaviour. The thermohygrometric indices (i.e. Thermohygrometric Index and HUMIDEX) exhibit a clearly deferent sensitivity pattern in comparison to the human energy balance indices (i.e. physiologically equivalent temperature (PET), perceived temperature (PT), modified physiologically equivalent temperature (mPET) and Universal Thermal Comfort Index (UTCI)), and they are incapable to handle the complexity of the atmospheric stimuli on human thermal perception. On the other hand, human energy balance indices can follow the input parameters fluctuations but with different grades of sensitivity. PET and mPET present a moderate and gradual sensitivity both in terms of the input variation and input change rate. PT is the less sensitive index among the human energy balance investigated, but it is able to follow efficiently the input parameters variation during the measurements period. Moreover, UTCI is the most sensitive among all the selected indices for low values (and low change rate) of the input parameters but for high input parameter values (except the wind speed), UTCI exhibits a low sensitivity in comparison to the other human energy balance indices. In terms of sensitivity, the most influential input parameter is global radiation, and the less influential is vapour pressure. [ABSTRACT FROM AUTHOR]

This paper uses the Growth Accounting methodology to estimate technological change, as well as labor and capital productivity in the various sectors of the Greek economy over the period 1988–1998. The results show that the technological level, as measured through annual growth in Total Factor Productivity, has remained practically unchanged. Meanwhile, technological change accounts for about 40% of economic growth, which is slightly lower compared with the relative performance of other O.E.C.D. countries. Finally, our main findings are, in general terms, consistent with estimates by other researchers. [ABSTRACT FROM AUTHOR]

The present paper applies empirically the methodology of backward and forward R & D multipliers for the case of Greece, which, despite its high growth rates in output (G.D.P.), ranks last among European Union (E.U) countries in R&D expenditure. The backward R&D multipliers measure the total amount of R&D expenditure embodied in one unit of an industry’s final demand. On the other hand, forward multipliers reflect the percentage of an industry’s R&D expenditures that is embodied in the final output categories. The results show that the Greek economy experiences a decrease in backward R&D multipliers over the time period 1993–1997, and some policy implications are discussed, regarding the country’s priority to increase R&D diffusion and stimulate R&D financing. [ABSTRACT FROM AUTHOR]

The literature review has revealed the critical role of local residents in ongoing tourism development. The present paper investigates the perceptions of the Greek local population toward tourism development and their engagement in participatory opportunities in a case study of a Greek protected area. According to the results, the respondents have not fully understood the meaning of the protected area. They pay particular attention to activities related to business and economic development, derived from the activities which are proposed as necessary for tourism development. Furthermore, the study shows the weak engagement of the respondents in participatory opportunities which is related to the demographic characteristics of them, as well as to the factors related to economic benefits and environment. However, residents support the need for a new scheme where local population will actively participate in the decision-making process. The supporting role of local authorities is likely to be one of the main factors affecting residents' intention to engage in participatory opportunities. [ABSTRACT FROM AUTHOR]