23 research outputs found
SciTo Trends: Visualising Scientific Topic Trends
No full text<p>Presentation of the TPDL 2019 demo paper "SciTo Trends: Visualising Scientific Topic Trends".</p>
<p><a href="https://scito.imsi.athenarc.gr">SciTo Trends</a> is a platform that facilitates exploration of scientific topic trends and provides intuitive infographics to showcase the topics' popularity trends. </p>
<p>Full author list: Serafeim Chatzopoulos, Panagiotis Deligiannis, Thanasis Vergoulis, Ilias Kanellos, Christos Tryfonopoulos, Theodore Dalamagas</p>
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SciTo Trends: Visualising Scientific Topic Trends
No full textMonitoring trends in scientific disciplines is a common task for researchers and other professionals in the broad research and academic community, like research and innovation policy makers and research fund managers. We demonstrate SciTo, a powerful tool that assists in the monitoring of trends in scientific disciplines. SciTo supports keyword-based search for the identification of scientific topics of interest and comparison of interesting topics to each other in terms of their popularity inside the academic community.
Full author list: Serafeim Chatzopoulos, Panagiotis Deligiannis, Thanasis Vergoulis, Ilias Kanellos, Christos Tryfonopoulos, Theodore Dalamaga
Challenges of integrating hydrogen in an operational port environment: Safety, Terminal Planning and Decision making aspects
No full textHydrogen is expected to be a significant force in this transition. Hydrogen can be produced using technologies that do not emit CO2 or other greenhouse gasses (“green H2”). Hydrogen can be transported in big quantities and long distances unlike electricity and can play the role of a clean fuel. The emerging hydrogen economy, which will be accompanied by the gradual phase-out of fossil fuels, will significantly impact ports around the world. Ports can and should play a pivotal role in this “energy revolution”. Apart from import and export services, ports often include industrial clusters, they provide servicing and refuelling to visiting vessels and connect major trade routes.This study aims at understanding and providing insights on challenges that the above-explained transition will create in a port environment focusing on hydrogen. Firstly, a favourable policy environment for hydrogen projects in the ports and maritime sector is a key topic that this study will address. This is included as a conclusion in many reports and port conferences. Secondly, the questions related to terminal planning and area requirements of hydrogen terminals remain unanswered as large scale hydrogen projects do not exist yet -with many being under development-, and thus this research will try to shed light on area calculations of hydrogen terminals. Thirdly, and lastly, terminals operators, investors and policy makers will need to make decisions on the preferred hydrogen carrier and location for various hydrogen projects that will be developed in the near future. Therefore, a method of comparison of different alternatives is required, especially when terminals are planned next to existing liquid bulk terminals.Civil Engineering | Hydraulic Engineerin
A case study of the new breakwater of the Port of Genova: Comparing the PIANC design method with the new EUROCODE
No full textBreakwaters used to protect harbours and coastal areas worldwide are one of the most common coastal structures. The complexity of the physical processes associated with the design has led to the development of many empirical formulas while a standardized method for the selection of breakwaters’ design parameters in the EU does not yet exist. The most common approach to design such a structure nowadays entails using information and recommendations from design manuals and guidelines such as PIANC and the Eurotop Manual. A new Eurocode 1 which includes specific considerations for coastal structures such as breakwaters is in the development process. This study aims to compare the PIANC method with the method to derive actions/loads included in the Eurocode proposal prEN1991-1-8. To do so the following research question has been formulated: “What differences between the PIANC method and the method proposed by the new EUROCODE in the design of a vertical wall breakwater can be identified, using the new breakwater at the Port of Genoa as a case study?“ As mentioned in the question, a case study is used. The Port of Genoa, one of the biggest ports in Italy plans to construct a new vertical wall breakwater. An initial design is openly available along with wave and water level data. This design is assessed using both methods and is further optimized. The aim is to gain insights into the differences between the PIANC and the new method. At first, the failure mechanisms of such a structure are defined along with the safety factors and parameters. The data required to perform such an assessment is also an important aspect of the exercise. Most of the data are openly available during the consulting phase for the new breakwater in Genoa. In cases where extra data were necessary, they were based on the literature or on reasonable assumptions. Based on the failure mechanisms and the retrieved data, the initial breakwater cross-section was assessed. The assessment both with the PIANC method and the new Eurocode proved that this design is sufficient and can be further optimized to decrease its costs. A high-level optimization is also conducted as part of this study in order to better understand the differences between the two methods. It can be concluded that the differences lay more in the method than in the actual result. For example, the proposed Eurocode creates a stable theoretical framework of how to choose a return period. The actual number may be very similar to the one that one would have used either way, but the choice can be argued in a better way. On the other hand, the use of the new Eurocode revealed some problems and inconsistencies in the document which is confusing in certain parts. In addition, the new Eurocode which among others aims at standardizing the design process. However, parts like the combination of wave and water level actions and the choice of return period for the two main limit state functions are relatively clearer providing a solid base.Civil Engineering | Hydraulic Engineerin
Studying the Readability of Scientific Papers
No full textPresentation of the TPDL 2019 paper "A study on the readability of scientific texts".
We perform a longitudinal study about the readability of scientific texts on a large, multidisciplinary dataset. Furthermore, we measure the agreement of traditional readability metrics with expert judgements. Finally, we investigate the association of publication abstract readability with scientific impact.
Full author list for the paper: Thanasis Vergoulis, Ilias Kanellos, Anargiros Tzerefos, Serafeim Chatzopoulos, Theodore Dalamagas, Spiros Skiadopoulo
Career Concerns of Banking Analysts
No full textArticleThis is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.We study how career concerns influence banking analysts’ forecasts. Banking analysts’ first
(last) earnings forecast of the year is relatively more optimistic (pessimistic) for a bank that
could be their future employer. This pattern is not observed when the same analysts forecast
earnings of banks unlikely to be their future employer. We use the Global Settlement as an
exogenous shock on career concerns and show that this forecast pattern is more pronounced
after the Settlement. Moreover, we find evidence that more biased analysts in their forecasts
of potential future employers are more likely to move to a higher reputation bank
BIP! Finder: Facilitating Scientific Literature Search by Exploiting Impact-Based Ranking
No full textPresentation of the CIKM 2019 demo paper "BIP! Finder: Facilitating Scientific Literature Search by Exploiting Impact-Based Ranking".
Due to the rapidly increasing number of scientific articles, finding valuable work for further research has become tedious and time consuming. To alleviate this issue, search engines have used citation-based article impact ranking. However, most engines rely on very simplistic impact measures (usually the citation count) and make the problematic assumption that there is a one-size-fits-all impact measure. To address these problems, we present BIP! Finder, a search engine that facilitates the identification of valuable articles by exploiting two different impact measures, each capturing a different aspect of the article impact. In addition, BIP! Finder provides many useful features (article comparison, intuitive visualisations, article bookmarking mechanism, etc.) making it a powerful addition to the researcher’s toolbox.
Full author list for the paper: Thanasis Vergoulis, Serafeim Chatzopoulos, Ilias Kanellos, Panagiotis Deligiannis, Christos Tryfonopoulos, Theodore Dalamagas</p
Socio-economic risk assessment of the setback zone in beaches threatened by sea level rise induced retreat (Peloponnese coast- Eastern Mediterranean)
No full textBeaches play a pivotal role in supporting the socio-economic sector, particularly within the 'Sun, Sea, and Sand' (3S) tourism model. Valued for their ecosystem services, these coastal landforms are among the most dynamic and vulnerable environments, facing significant pressure from various climate challenges, which is further intensified by extensive anthropic exploitation. Their sustainable use is intrinsically linked to balancing the 3Ps: Planet, People, and Profit. To address the need for protection and sustainable utilization of coastal areas, the European Union has introduced the Protocol on Integrated Coastal Zone Management (ICZM) in the Mediterranean, specifically recommending in Article 8(2) the establishment of a setback buffer zone where permanent constructions are prohibited. This paper explores the application of risk mapping in the context of coastal setback policies, focusing on their effectiveness in managing beach retreat and adapting to climate change, particularly rising sea levels. The study examines selected beach areas in Peloponnese, Greece, influenced by various socio-economic factors. Through this analysis, the paper aims to contribute to the discourse on coastal management strategies that balance environmental sustainability with socio-economic benefits. © The Author(s) 2024
Estimating Monetary Reaction Functions at Near Zero Interest Rates: An Example Using Japanese Data
No full textThe importance of truncated distributions for bias in estimation of regression coefficients has been well understood by econometricians, but the relevance of truncation when estimating policy reaction functions has not been fully appreciated. Due to the emergence of low interest rates and the proximity of a zero lower bound (ZLB) on interest rates, coefficient estimates can be biased upwards. This paper illustrates the importance of measuring and correcting estimates for this bias using Japan’s unique experience of prolonged low inflation/deflation. While we would expect the monetary policy reaction function in Japan to differ from other countries in the G4, we show the bias from truncation of the interest rate distribution is significant and needs to be taken into account.Monetary policy, Reaction functions, Zero lower bounds, Japan, Tobit.
Pension Provision and Retirement Saving: Lessons from the United Kingdom
No full textWe describe the trajectory of pension reform in the United Kingdom, which has focussed on keeping the cost of public pension programmes down during a period of steady population ageing whilst attempting to maintain an adequate minimum level of income security for low income households in retirement. Instruments for achieving these aims have been to target public benefits on low income households, permitting individuals to opt out of the second tier of the public programme into private retirement accounts, and the use of tax incentives to encourage additional private retirement saving. Frequent reforms to the pension programme raise the question of whether households can make reasonable private retirement saving provision in the light of growing complexity and potential shortcomings in individual decision-making. This paper sheds some light on these issues.
