Littérature scientifique sur le sujet « Maritime connectivity »
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Articles de revues sur le sujet "Maritime connectivity"
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Dawson, Michael. « Maritime Connectivity Symposium ». PAGES news 15, no 1 (avril 2007) : 29. http://dx.doi.org/10.22498/pages.15.1.29.
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Bouazza, Samia, Zoubida Benmamoun et Hanaa Hachimi. « Maritime Bilateral Connectivity Analysis for Sustainable Maritime Growth : Case of Morocco ». Sustainability 15, no 6 (10 mars 2023) : 4993. http://dx.doi.org/10.3390/su15064993.
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On the African continent, Morocco is considered among the most connected countries, according to the liner shipping connectivity index. Since optimal shipping connectivity can reduce CO2 emissions and trade costs, through this paper we aimed to deepen the understanding of maritime connectivity based on the bilateral maritime connectivity index of Morocco and 138 of its economic partners. We first established an overview of the evolution of the bilateral maritime connectivity in Morocco and highlighted its main regional maritime partners, then defined through a statistical analysis the factors influencing the development of the bilateral maritime links of the country in order to strengthen sustainable maritime connectivity. The results of the descriptive analysis show that Morocco has developed strong maritime connections with Europe and the East of Asia and has an improved connectivity with East African countries (2006–2020). The statistical analysis of the selected factors using regression analysis combined with a gravity model shows that there has been a strong and positive impact of economic growth, logistics, linear connectivity and the maritime component, and bilateral connectivity. Moreover, economic trade and barriers have had no significant effects on bilateral connectivity.
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Islam, Md Shariful. « Understanding Maritime Connectivity in South Asia : The Role of Domestic and External Actors ». Journal of Governance, Security & ; Development 1, no 2 (1 janvier 2021) : 1–13. http://dx.doi.org/10.52823/vuqc1654.
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Why is it essential to have maritime connectivity in South Asia? How do domestic and external actors play a role to promote maritime cooperation between Bangladesh., India and Sri Lanka? This article pursues answer to these questions. It argues that there is growing maritime challenges in the South Asian region. Additionally 90 percent of South Asian trade depends on the sea. Hence, maritime trade contributes significantly to the South Asian economy and development. Consequently, securing the maritime area of the region is of paramount interest in South Asia. Additionally, there are vast untapped maritime resources that need to explored and exploited. For this South Asian maritime connectivity will be imperative enough. The article argues that the role of the domestic and external actors in building maritime connectivity in South Asia needs to be taken into consideration seriously for successful maritime connectivity in the region.
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Muhammad Asy Ari Badar et Agus Salim. « Telaah Kritis Kebijakan Tol Laut Pada Periode Kedua Presiden Joko Widodo ». Mandub : Jurnal Politik, Sosial, Hukum dan Humaniora 1, no 4 (21 novembre 2023) : 313–21. http://dx.doi.org/10.59059/mandub.v1i4.680.
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The Maritime Highway Policy, as an effort by the Indonesian government to strengthen maritime connectivity and support economic growth, has become the main focus during the second term of President Joko Widodo's leadership. This research evaluates the concept, implementation and impact of this policy in the development of the maritime sector and national economy. The research results show that the Maritime Highway Policy has succeeded in increasing connectivity between regions, leveling economic growth, increasing investment, and supporting the revitalization of the maritime sector. With these efforts, Indonesia is further strengthening its image as a strong and competitive maritime country. This research provides insight into the important role of the Maritime Highway Policy in developing Indonesia's maritime economy and connectivity, supporting sustainable development, and reducing economic disparities between regions.
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Rao, P. V. « ‘Development through connectivity’ : India’s maritime narrative ». Journal of the Indian Ocean Region 15, no 3 (2 septembre 2019) : 245–64. http://dx.doi.org/10.1080/19480881.2019.1640578.
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Tianming, Gao, Vasilii Erokhin, Aleksandr Arskiy et Mikail Khudzhatov. « Has the COVID-19 Pandemic Affected Maritime Connectivity ? An Estimation for China and the Polar Silk Road Countries ». Sustainability 13, no 6 (22 mars 2021) : 3521. http://dx.doi.org/10.3390/su13063521.
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In light of about 80% of international freight traffic carried by sea, maritime supply chains’ stability is pivotal to global connectivity. For over a year now, the transboundary mobility of vessels and cargoes has been restricted by diverse forms of the COVID-19 containment measures applied by national governments, while the lockdowns of people, businesses, and economic activities have significantly affected the growth prospects of various maritime connectivity initiatives. This study investigates how the pandemic-related public health, trade, and market factors have shifted the connectivity patterns in the Polar Silk Road (PSR) transport corridor between China, South Korea, Japan, Russia, and four economies of Northern Europe. The causality links between the Shipping Connectivity Index (SCI) and the number of COVID-19 cases and deaths, trade volumes with China and the rest of the world, and price indexes of minerals, fuels, food, and agricultural products are revealed separately for eight countries and thirty-five ports. The study algorithm is built on the consecutive application of the Augmented Dickey-Fuller (ADF) and the Phillips-Perron (PP) stationarity tests, the Autoregressive Distributed Lag (ARDL) method, the Fully-Modified Ordinary Least Squares (FMOLS) and the Dynamic Ordinary Least Squares (DOLS) robustness checks, and the Toda-Yamamoto causality test. Tight trade-connectivity links are recorded in all locations along the China-PSR transport corridor in 2015–2019, but in 2020, the relationships weakened. Bidirectional influences between the number of COVID-19 cases and connectivity parameters demonstrate the maritime sector’s sensitivity to safety regulations and bring into focus the role of cargo shipping in the transboundary spread of the virus. The authors’ four-stage approach contributes to the establishment of a methodology framework that may equip stakeholders with insights about potential risks to maritime connectivity in the China-PSR maritime trade in the course of the pandemic.
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Lindenbergs, Artürs, Maciej Muehleisen, Miquel Payaró, Kati Kõrbe Kaare, Helmut W. Zaglauer, Johan Scholliers, Arvi Sadam, Kristjan Kuhi et Lasse Nykanen. « Seamless 5G Multi-Hop Connectivity Architecture and Trials for Maritime Applications ». Sensors 23, no 9 (22 avril 2023) : 4203. http://dx.doi.org/10.3390/s23094203.
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This paper provides a study of the different alternatives that are being considered in the 5G-ROUTES project to establish seamless 5G connectivity in a maritime environment both from an architectural point of view and also from the definition of field trials to evaluate the performance and dependability of the proposed solution. As expected, the main challenge in providing 5G connectivity on the sea is to provide coverage over large areas of open water. Thus, as a starting point, this paper presents a measurement campaign that was conducted to assess the current coverage in the Baltic Sea, which concluded that the current terrestrial networks cannot guarantee sufficient coverage. Next, the solution architecture and trials proposed by 5G-ROUTES are described, which are based on the integration of satellite and leading-edge multi-hop connectivity in 5G networks. Utilizing satellite backhaul can potentially overcome the connectivity challenge from the terrestrial domain to the maritime domain, while multi-hop connectivity ensures that coverage is extended among the different ships that are navigating the sea. Furthermore, this paper describes how the project will evaluate, in field trials tailored to this maritime environment, common connectivity key performance indicators (KPIs) such as latency, throughput, availability and reliability. This paper concludes by providing a vision for applying the obtained results and insights to maritime transportation and other remote areas where the deployment of a suitable 5G infrastructure may be challenging or costly. The findings will be used to guide the design of future 5G networks for marine applications and to identify the most effective methods for providing secure and dependable communication in a maritime setting.
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Irewati, Awani. « The Challenges of Constructing the Connectivity between Indonesia and Malaysia in the Malacca Strait ». Journal of Indonesian Social Sciences and Humanities 10, no 1 (30 juin 2020) : 1–15. http://dx.doi.org/10.14203/jissh.v10i1.159.
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Today, people have lived in one integrated space that make all their needs and activities can be served quickly and they become interdependent . In line with that, the implementation of connectivity concept within community, automatically, becomes inherent in their social and economic activities.Therefore, people need to construct connectivity in all activities. Even within the bigger community like ASEAN Community, people become more involved in a cohesive and competitive situation in order to fulfill the desired goals. Referring to one of President Jokowi's maritime development programs, namely "Toll Laut", it is the Indonesia government's target to construct/ build up the potential regional zone as strategic hub that connects with its neighboring countries. The long-lived relationship between Indonesia and Malaysia in regards of the Malacca Strait has been articulated in numerous activities. This is in accordance with what the needs of coastal community of the two countries . In this case, Medan and Dumai of Sumatera Island in Indonesia are the two cities which have traditionally established people to people connectivity with Penang and Melaka cities of Malaysia. In the context of ASEAN Community, such a connectivity has been part of the ASEAN Community target. There are three elements inherent in the connectivity concept, namely infrastructures, institutions and people to people. The two Indonesia coastal regions in this regards need to construct the other two concepts of connectivity in order to obtain the “normal” connectivity which is the prerequisite to connect Indonesia and Malaysia in the Malacca Strait. This becomes a big challenge for the Indonesia to fulfill the target of competitive,cohesive and inclusive sub-regional connectivity development. This paper aims at scrutinizing the main quest, which focuses on the challenges faced by Indonesia in building up /constructing the maritime connectivity with Malaysia in the Malacca Strait. The paper is in favor of the argument that the Indonesia’s maritime corridors [Dumai and Medan] seem to have problem. The maritime connectivity between the two countries has not built adequately. In this regards, the government should streamline the management system linked to the internal connectivity issue.
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Guerrero, David, Patrick Niérat, Jean-Claude Thill et Emmanuel Cohen. « Visualizing the maritime connectivity of African countries ». Journal of Transport Geography 101 (mai 2022) : 103355. http://dx.doi.org/10.1016/j.jtrangeo.2022.103355.
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Lee, Paul Tae-Woo, Sung-Woo Lee, Zhi-Hua Hu, Kyoung-Suk Choi, Na Young Hwan Choi et Sung-Ho Shin. « Promoting Korean international trade in the East Sea Economic Rim in the context of the Belt and Road Initiative ». Journal of Korea Trade 22, no 3 (10 septembre 2018) : 212–27. http://dx.doi.org/10.1108/jkt-03-2018-0015.
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Purpose The purpose of this paper is to analyze maritime logistics connectivity of ports and shipping networks in the East Sea Economic Rim (ESER) to promote international trade in the context of China’s Belt and Road Initiative (BRI), considering centrality, primary flow and clustering interaction. Design/methodology/approach The paper applies a complex network model, using a big data system consisting of an automated identification system, electronic data interchange and distributive and complex data. Three perspectives, including connectivity in trading ports and regions, centralities in the realm of complex network and potential marketing and regional impacts, and sixteen criteria are considered for this analysis. A visual approach has been also applied to highlight port connectivity and ship flows for the reader’s convenience. Findings The paper shows that port connectivity and maritime logistics are enablers to promote Korean international trade in Northeast China through the ESER, and 25 major ports are well connected to promote international trade in the region with visual data of ship flows by ship type and by flag. Research limitations/implications Owing to the lack of port management information systems among the countries in the ESER except Korea and Japan, this paper could not capture cargo types and amounts on board. Port connectivity analysis shows links of the ports in the ESER to major ports in southeast Asia along the Twenty-first Century Maritime Silk Road (MSR). These results contribute to drawing policy implications to promote the ESER and provide suggestions for promoting Korean international trade by enhancing maritime logistics connectivity. Originality/value Unlike the existing literature showing descriptive and policy-oriented research related to ESER, this paper applied a vigorous method with a big amount of data to analyze port connectivity and ship flows in the ESER, considering China’s BRI affecting the global supply chain system, maritime transportation, and logistics. In addition, the paper shows how the seaports in the ESER are connected along the MSR.
Thèses sur le sujet "Maritime connectivity"
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Karamperidis, Stavros. « Development of an index for maritime container transport costs, connectivity and risks for the UK ». Thesis, University of Newcastle upon Tyne, 2013. http://hdl.handle.net/10443/2426.
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Purpose This study develops an index of maritime container transport costs, connectivity and risks for the UK. Data pertaining to the UK-China maritime container corridor was used as this corridor is typical of container flows in and out of the UK. The baseline year for the index was 2010. Research design A mixed method approach, across three phases, was used for the development of the index. A literature review revealed factors affecting costs, connectivity, risks and indices that exist in the maritime transport sector, while a content analysis yielded additional knowledge concerning the indices. In Phase 1 of the research, 26 face-to-face in-depth interviews were conducted for weights extraction. Those weights were used in Phase 2, combined with secondary data for each factor to compose the Prime Index. The index was validated by a focus group of academics in Phase 3a. Thereafter (Phase 3b), a Delphi survey was carried out to derive consensus regarding the factors used for the development of the index, the index weights, the overall index and the data sources used. In Phase 3c a focus group verified the overall index, while Phase 3d provided an assessment of the risk factors and sources via an in-depth face-to-face interview. Findings An index was generated comprising of 68 factors and grouped into three categories; cost, connectivity and risk. The overall index improved by 7.15 percent in 2011, compared with its baseline (2010). That finding aligns with experts’ observations that, in 2011, it was easier for them to move maritime containers in and out the UK than in 2010. Research implications/limitations The index will assist all stakeholders in the maritime container transport chain to better understand the impact of changes in services, costs and risks. Originality/value This research created an index of cost, connectivity and risk for the maritime container transport sector and also provides a framework for the creation of such an index. The ii index is the first such index developed to date which captures these factors. The framework can also be applied by stakeholders to other maritime transport sectors.
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Paladin, Alessandro <1995>. « EU-Asia connectivity : the impact of the Belt and Road Initiative on maritime trade and future perspectives for Italian ports ». Master's Degree Thesis, Università Ca' Foscari Venezia, 2020. http://hdl.handle.net/10579/16905.
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In questa tesi finale viene analizzata la volontà di aumentare la connettività tra i paesi asiatici, in particolare la Cina, e i paesi europei. C’è la volontà di coinvolgere e contribuire allo sviluppo dell’area Euroasiatica, Asiatica e Africana da parte della Cina e di molte potenze mondiali. Il tutto parte dall’analisi dell’iniziativa cinese Belt and Road (BRI) che mira ad aumentare la connettività infrastrutturale, via terra e via mare, tra i paesi coinvolti nel progetto, ma è anche un’iniziativa che mira ad aumentare le relazioni economiche, politiche e socio-culturali. Verranno analizzate in particolare nel quadro della BRI, le rotte della nuova vie della seta, i paesi e la popolazione coinvolta e i grandi finanziatori del progetto. Seguirà un’analisi del ruolo dell’Italia anche alla luce dei nuovi accordi commerciali e istituzionali firmati tra Italia e Cina e un’analisi geopolitica su pro e contro, mettendo in luce le reali intenzioni cinesi e le reazioni internazionali al progetto, soprattutto da parte degli Stati Uniti d’America. La parte centrale di questo elaborato si concentrerà sul commercio marittimo mondiale attuale e futuro, considerando rotte e volumi del commercio, segnando l’importanza di Suez e della ritrovata centralità del Mar Mediterraneo in un mondo dove il baricentro geo-economico del commercio si sta spostando sempre più ad Est. Seguirà una comparazione della strategia europea e quella cinese sul tema. Ci sarà poi un’analisi dell’impatto della BRI sui porti italiani e un focus sui possibili sviluppi e prospettive per i porti del Nord Adriatico, che sono di particolare interesse Cinese e possibile porta d’accesso via mare al commercio europeo. Il ruolo dell’Italia all’interno delle reti europee TEN-T, essenziale sul mare e importante del punto di vista ferroviario, diventa centrale e una grande potenzialità di sviluppo per il nostro paese. Sul tema, proveremo a dare una soluzione per l'azione futura italiana, all'interno di una visione comune europea, per poter far fronte alle nuove sfide del commercio globale e all'emergere di nuove potenze globali, in un mondo che sta sempre più cambiando.
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Roelens-Flouneau, Hélène. « Circuler en Asie Mineure cistaurique du IVème siècle avant notre ère au principat ». Thesis, Paris 10, 2013. http://www.theses.fr/2013PA100082.
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L’époque hellénistique est, pour la péninsule anatolienne, une période d’intensification des circulations. Après la conquête d’Alexandre, elle apparaît en effet pour les Gréco-Macédoniens comme un passage obligé vers l’Orient. Ce travail se propose d’étudier les infrastructures qui permirent ces déplacements : les routes et tous les aménagements qui les bordaient ou assuraient sa continuité ; les fleuves navigables, et les lignes maritimes qui reliaient les ports des côtes micrasiatiques. À partir de différentes études de cas, on montre comment ces voies de circulation fonctionnaient en réseau au niveau local, régional et supra-régional. Dans un second temps, on analyse l’influence des institutions sur l’organisation des circulations : les pouvoirs, par l’installation d’infrastructures, le contrôle des déplacements et diverses politiques économiques et financières, avaient la possibilité d’encourager la circulation des biens et des personnes. Enfin, on s’intéresse aux conditions de déplacement des voyageurs et au déroulement du voyage depuis sa préparation par le biais d’actions religieuses, et le choix d’un mode de déplacement, ou d’un lieu d’hébergement jusqu’à la manière dont le voyageur se repérait pour trouver son chemin dans un territoire dont il avait une représentation plus ou moins préciseDuring the Hellenistic Period there was an intensification of movement within Anatolia. After Alexander’s conquest, Asia Minor became, in effect, for Greeks and Macedonians a necessary stepping stone for travel to the East. This thesis begins by studying the infrastructure which facilitated the mobility of people and goods, in particular roads and their facilities, as well as navigable rivers and maritime routes which connected the harbours of Asia Minor. Different case studies demonstrate the existence of local, regional and supra-regional road-networks in this area. The second part of this thesis explores the influence of institutions on the organisation of circulation and the different ways in which authorities could encourage the circulation of goods and people – includingthe creation of infrastructure, the control of mobility, and different economic and financial policies. In conclusion, this thesis examines the conditions of travel from the perspective of the traveller, including religious preparations, the choice of means of transport and accomodation as well as the means travellers used for planning their journeys and navigating and what these tell us about how space and distance were conceived
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Dial, Rania Tassadit. « Les liaisons terrestres et maritimes et la concurrence interportuaire : les défis pour la croissance des ports européens ». Electronic Thesis or Diss., Toulon, 2021. http://www.theses.fr/2021TOUL2001.
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Cette thèse propose une analyse axée à la fois sur les relations interportuaires et sur celles qui régissent les segments du commerce international maritime : les ports leurs avant et arrière-pays. Dans un premier chapitre, un bilan sur les hiérarchies et la croissance relative en Europe est dressé. A l’aide de deux méthodes complémentaires : chaines de Markov et les clubs de convergence, il montre qu’il existe une polarisation de la croissance au sein d’un nombre limité de grands ports et une forte fréquence pour les plus défavorisés. Ce résultat marque l’absence de convergence au sein des ports européens. Par ailleurs, le phénomène de « contestation portuaire périphérique » s’exercerait ici par les petits ports à l’égard de ceux de taille moyenne, ce qui contesterait fortement certains résultats de la littérature sur le sujet. Le second chapitre met en lumière l’importance de la relation entre le port et ses environnements terrestres et maritimes. Il se concentre sur l’aspect spatial qui caractérise ces relations et montre qu’il existe des disparités entre les régions portuaires. Alors que le Nord de l’Europe se caractérise par la complémentarité, les ports du Sud entretiennent des relations concurrentielles. Il montre aussi que, la taille du marché local et sa proximité des ports ne sont pas systématiquement, de bons déterminants du débit. L’accessibilité au marché à partir des régions portuaires périphériques est cependant, déterminante et peut s’expliquer par l’existence de niches de marchés au sein de ces zones. Le troisième chapitre se concentre sur la connectivité maritime par pays, ses déterminants ainsi qu’aux effets spatiaux pouvant l’influencer. L’analyse révèle qu’il existe des différences substantielles entre l’Europe du Nord et la Méditerranée. Elle, permet au-delà, des résultats de la littérature, d’identifier les relations dominantes dans chaque région. Bien que la complémentarité et la concurrence puissent coexister entre ports/pays voisins, cette étude montre que l’une peut très bien l’emporter sur l’autreThis thesis proposes an analysis focused both on inter-port relations and on those governing the international maritime trade elements: ports, hinterland and foreland. In the first chapter, an assessment on hierarchies and relative growth in Europe is made by applying two complementary methods: Markov chains and convergence clubs. These show that there is a growth polarization within a limited number of large ports and a high frequency for those most disadvantaged. This result marks the lack of convergence within European ports. In addition, the phenomenon of "peripheral port challenge" would be exercised here by the small ports on the medium-sized ones, which would strongly contest some literature results on this issue. The second chapter highlights the importance of the relationship between the port and its hinterland and maritime environments. It focuses on the spatial aspect that characterizes these relationships and shows existing disparities between port regions. While Northern Europe is characterized by complementarity, Southern ports have competitive relationships. It also shows that the size of the local market and its proximity to the ports are not systematically good determinants of throughput. However, the accessibility to the market from peripheral port regions is a determining factor and can be explained by the existence of market niches within these areas. The third chapter focuses on maritime connectivity by country, its determinants and the spatial effects that can influence this. The analysis reveals that there are substantial differences between Northern Europe and the Mediterranean. It allows, beyond the results of literature, to identify the dominant relationships in each region. Although complementarity and competition may coexist between neighboring ports/countries, this study shows that one may prevail over the other
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Garbin, Silvia. « A probabilistic approach to quantifying spatial patterns of flow regimes and network-scale connectivity ». Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3426368.
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This thesis proposes a probabilistic approach for the quantitative assessment of reach- and network-scale hydrological connectivity as dictated by river flow space-time variability. Spatial dynamics of daily streamflows are estimated based on climatic and morphological features of the contributing catchment, integrating a physically based approach that accounts for the stochasticity of rainfall with a water balance framework and a geomorphic recession flow analysis. Ecologically meaningful minimum stage thresholds are used to evaluate the connectivity of individual stream reaches, and other relevant network-scale connectivity metrics.
The framework allows a quantitative description of the main hydrological causes and the ecological consequences of water depth dynamics experienced by river networks.
The analysis conducted in this thesis shows that the spatial variability of local-scale hydrological connectivity strongly depends on the spatial and temporal distribution of climatic variables. Depending on the underlying climatic settings and the critical stage threshold, loss of connectivity can be observed in the headwaters or along the main channel, thereby originating a fragmented river network. The network-scale approach developed in this work provides important clues for understanding the effect of climate on the ecological function of river corridors, and offers a new perspective to define ecological flows for the development of sustainable water policies.Questa tesi propone un approccio probabilistico per quantificare la distribuzione spaziale della connettività idrologica alla scala di rete dettata dalla variabilità spazio-temporale dei deflussi. Le dinamiche spaziali dei deflussi sono definite sulla base delle caratteristiche climatiche e morfologiche del bacino contribuente, integrando un approccio fisicamente basato che descrive la stocasticità delle precipitazioni, ed incorporando un modello di bilancio idrologico e un modello di deflusso di recessione geomorfologica. La connettività idrologica lungo il reticolo idrografico è valutata sulla base di soglie associate a tiranti idrici ecologicamente significativi. Il modello proposto consente una descrizione quantitativa delle principali cause idrologiche e delle conseguenze ecologiche delle dinamiche dei tiranti sperimentate dalle reti fluviali. Le analisi condotte in questa tesi mostrano che la variabilità spaziale della connettività idrologica alla scala locale dipende fortemente dalla distribuzione spaziale e temporale delle variabili climatiche. I risultati evidenziano come la forma del reticolo connesso possa essere influenzata in modo cruciale dalle dinamiche idrologiche sottostanti. L'approccio a scala di rete sviluppato in questo lavoro fornisce importanti elementi per la comprensione dell'effetto del clima sulla funzione ecologica dei corsi d'acqua naturali e offre una nuova prospettiva per la definizione dei deflussi ecologici determinanti per lo sviluppo di politiche idriche sostenibili.
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Lazzaro, Gianluca. « Multi-objective optimization of run-of-river hydropower : hydrologic disturbance, stream connectivity and economic profitability ». Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3425707.
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Although run-of-river hydropower represents a key source of renewable energy, it cannot prevent stresses on river ecosystems. This is especially true in mountain regions, where the outflow of a plant is placed several kilometres downstream of the intake, inducing the depletion of river reaches of considerable length.
In this thesis, multi-objective optimization is used in the design of the capacity of run-of-river plants to identify optimal trade-offs between contrasting objectives: the maximization of the profitability and the minimization of the impact induced by the plant. The latter is quantified either as the upstream/downstream changes of a set of ecologically-relevant flow metrics, or as the loss of hydrological connectivity in the impacted river reaches.
Optimal plant sizes are devised for several case studies belonging to catchments in Italy and UK.
Results show that the duration of economic optimal design capacity is strongly affected by the nature of the flow regime at the plant intake.
In particular, the analysis emphasizes the important distinction between persistent (reduced variability) and erratic (enhanced variability) streamflow regimes.
Multi-criteria optimization indicates that in persistent regimes a trade-off between profitability and hydrologic impact is achieved reducing the plant capacity below the economic optimum, whereas in erratic regimes distinct trade-offs are available depending on the relative importance of the different flow statistics.
This work also confirms that water abstractions for human exploitation induce ecologically-meaningful and quantifiable impacts on the hydrologic connectivity of altered river reaches, which may limit significantly migratory movements of fish. The application of a probabilistic eco-hydrological model to reproduce the observed immigration rates of Atlantic salmon in a Scottish river shows that limitations of connectivity are more pronounced in years where exceedance probability of relatively high flow is low.
The analyses conducted in this thesis show that residual flows represents a key decision variable to preserve the connectivity of impacted river reaches, and thus should be carefully considered in planning environmental policy actions.
The analytical tools developed in this thesis could provide a clue for evaluating the environmental footprint of run-of-river plants and improve sustainability of energetic exploitation of surface water.Sebbene gli impianti idroelettrici ad acqua fluente rappresentino una importante risorsa di energia rinnovabile, non si può affermare che abbiano un impatto trascurabile sugli ecosistemi fluviali. In particolare, nelle regioni montane la restituzione delle acque processate avviene diversi chilometri a valle rispetto alla posizione dell'opera di derivazione, determinando quindi la sottrazione di risorse idriche per tratti considerevoli della rete fluviale. In questa tesi, si utilizzano tecniche di ottimizzazione multi-obiettivo per stimare la capacità di un impianto ad acqua fluente, cercando di bilanciare due obiettivi contrastanti: la massimizzazione del valore economico e la minimizzazione dell'impatto che tali impianti determinano. L'alterazione indotta sugli ecosistemi è quantificata sia come il cambiamento tra monte e valle della presa di una serie di indicatori idrologici rappresentativi dello stato di salute dell'ecosistema, sia come la perdita di connettività idrologica nel tratto di rete fluviale impattato. La capacità ottimale è quindi stimata per una serie di casi studio corrispondenti a impianti costruiti, o in via di costruzione, in bacini idrografici in Italia e Regno Unito. I risultati mostrano come la durata della capacità che massimizza l'economia sia influenzata dal regime idrologico naturale alla sezione di presa. In particolare, questo lavoro dimostra come la distinzione tra regimi idrologici persistenti (ridotta variabilità) ed erratici (marcata variabilità) condiziona fortemente le scelte progettuali. L'ottimizzazione multi-obiettivo indica che un bilanciamento tra economia e impatto idrologico in regimi di tipo persistente sia possibile solamente riducendo la capacità dell'impianto al di sotto di quella che massimizza il solo valore economico. D'altra parte, in regimi di tipo erratico esistono diverse capacità ottimali sulla base della relativa importanza delle diverse statistiche del regime idrologico. Questo lavoro dimostra inoltre che le sottrazioni di risorsa idrica a fini antropici inducono impatti considerevoli e quantificabili sulla connettività idrologica del tratto fluviale alterato, che a sua volta può rappresentare un ostacolo significativo ai movimenti migratori delle specie fluviali. L'applicazione di un modello eco-idrologico di stampo probabilistico ha poi consentito di riprodurre i flussi migratori a scopi riproduttivi dei salmoni Atlantici in una rete fluviale scozzese, mostrando come le limitazioni di connettività idrologica sono maggiormente pronunciate negli anni in cui è bassa la probabilità di superamento di alti valori di portata. Le analisi riportate in questa tesi mostrano inoltre che il deflusso minimo vitale rappresenta una variabile decisionale fondamentale al fine di preservare la connettività nei tratti fluviali impattati, e che quindi deve necessariamente essere considerato con particolare cura nella pianificazione di politiche di salvaguardia ambientale. Gli strumenti analitici sviluppati in questa tesi forniscono quindi spunti interessanti per la valutazione dell'impatto ambientale degli impianti idroelettrici ad acqua fluente e consentono di aumentare la sostenibilità delle opere di sfruttamento energetico delle risorse idriche.
Livres sur le sujet "Maritime connectivity"
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National Maritime Foundation (New Delhi, India) et S. Rajaratnam School of International Studies, dir. Furthering maritime connectivity : India and Southeast Asia. New Delhi : Matrix Publishers, 2011.
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ASEAN connectivity in Indonesian context : A preliminary study on geopolitics of hydropower and maritime transport. Jakarta, Indonesia : Centre of Policy Analysis and Development for Asia-Pacific and African Regions, Policy Analysis and Development Agency, Ministry of Foreign Affairs of the Republic of Indonesia, 2011.
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Nocera, Silvio, Raffaele Pesenti, Igor Rudan et Srđan Žuškin. Priorities for the Sustainability of Maritime and Coastal Passenger Transport in Europe. Venice : Fondazione Università Ca’ Foscari, 2022. http://dx.doi.org/10.30687/978-88-6969-617-6.
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Maritime transport is both a major source of environmental pollution and a great opportunity for reducing road traffic. This book provides a wide perspective on the challenge related to the improvement of maritime assenger transport. This publication was conceived within the framework of the MIMOSA project (Maritime and Multimodal Sustainable Passenger Transport Solutions and Services, Interreg V-A Italy-Croatia CBC Programme 2014-20), whose goal is to improve cross-border connectivity between Italy and Croatia by tackling the common challenge of increasing multimodality and reducing the impact of transport on the environment.
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Bank, The World. Maritime Networks, Port Efficiency, and Hinterland Connectivity in the Mediterranean. The World Bank, 2018.
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Arvis, Jean-François, Vincent Vesin, Robin Carruthers, César Ducruet et Peter de Langen. Maritime Networks, Port Efficiency, and Hinterland Connectivity in the Mediterranean. Washington, DC : World Bank, 2018. http://dx.doi.org/10.1596/978-1-4648-1274-3.
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Leidwanger, Justin. Roman Seas. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190083656.001.0001.
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This book offers an archaeological analysis of maritime economy and connectivity in the Roman east. That seafaring was fundamental to prosperity under Rome is beyond doubt, but a tendency to view the grandest long-distance movements among major cities against a background noise of small-scale, short-haul activity has tended to flatten the finer and varied contours of maritime interaction and coastal life into a featureless blue Mediterranean. Drawing together maritime landscape studies and network analysis, this work takes a bottom-up view of the diverse socioeconomic conditions and seafaring logistics that generated multiple structures and scales of interaction. The material record of shipwrecks and ports along a vital corridor from the southeast Aegean across the northeast Mediterranean provides a case study of regional exchange and communication based on routine sails between simple coastal facilities. Rather than a single well-integrated and persistent Mediterranean network, multiple discrete and evolving regional and interregional systems emerge. This analysis sheds light on the cadence of economic life along the coast, the development of market institutions, and the regional continuities that underpinned integration—despite certain interregional disintegration—into Late Antiquity. Through this model of seaborne interaction, the study advances a new approach to the synthesis of shipwreck and other maritime archaeological and historical economic data, as well as a path through the stark dichotomies that inform most paradigms of Roman connectivity and trade.
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Hamilton, Douglas, et John McAleer, dir. Islands and the British Empire in the Age of Sail. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198847229.001.0001.
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Islands are not just geographical units or physical facts; their importance and significance arise from the human activities associated with them. The maritime routes of sailing ships, victualling requirements of their sailors, and strategic demands of seaborne empires in the age of sail – as well as their intrinsic value as sources of rare commodities – meant that islands across the globe played prominent parts in imperial consolidation and expansion. This volume examines the ways in which islands (and groups of islands) contributed to the establishment, extension, and maintenance of the British Empire in the age of sail. Chapters explore the geographical, topographical, economic, and social diversity of the islands that comprised a large component of the British Empire in an era of rapid and significant expansion. Although many were isolated rocky outcrops, they acted as crucial nodal points, providing critical assistance for ships and men embarked on the long-distance voyages that characterized British overseas activities in the period. Intercontinental maritime trade, colonial settlement, and scientific exploration would have been impossible without these oceanic islands. They also acted as sites of strategic competition, contestation, and conflict for rival European powers keen to outstrip each other in developing and maintaining overseas markets, plantations, and settlements. The importance of islands outstripped their physical size, populations, or individual economic contribution to the imperial balance sheet. Standing at the centre of maritime routes of global connectivity, islands offer historians fresh perspectives on the intercontinental communication, commercial connections, and territorial expansion that characterized the British Empire.
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Groom, Nick. Draining the Irish Sea. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198795155.003.0002.
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In 1722, an anonymous author published Thoughts of a Project for Draining the Irish Channel. This neglected work is a satire on both the South Sea Bubble and Anglo-Irish politics, capitalizing on the craze for speculation, scientific advances in hydraulics, resource management, political arithmetic, and improvement. This chapter accordingly argues that land reclamation was an effective metaphor for Anglo-Irish policy and British imperialism, which in turn raised questions of national identity, regional connectivity, and environmental management. It introduces new evidence to historicize coastal work by blending textual criticism, political and legal analysis, regional folklore studies, and counterfactual history. The chapter provides a history of the Irish Sea and an account of maritime trade and property rights, as well as an analysis of the pamphlet itself (including its connections to the work of Jonathan Swift). It ends with a thought experiment imagining the impact had the channel actually been drained.
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Chia, Jack Meng-Tat. Monks in Motion. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190090975.001.0001.
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Chinese Buddhists have never remained stationary. They have always been on the move. Why did Buddhist monks migrate from China to Southeast Asia? How did they participate in transregional Buddhist networks across the South China Sea? In Monks in Motion, Jack Meng-Tat Chia tells a story of monastic connectivity across the South China Sea during the twentieth century. Following in the footsteps of three prominent monks—Chuk Mor (1913–2002), Yen Pei (1917–1996), and Ashin Jinarakkhita (1923–2002)—Chia explores the connected history of Buddhist communities in China and maritime Southeast Asia. Monks in Motion is the first book to offer a history of what Chia terms “South China Sea Buddhism,” referring to a Buddhism that emerged from a swirl of correspondence networks, forced exiles, voluntary visits, evangelizing missions, institution-building campaigns, and the organizational efforts of countless Chinese and Chinese diasporic Buddhist monks. Drawing on multilingual research conducted in Indonesia, Malaysia, Singapore, China, Hong Kong, and Taiwan, he challenges the conventional categories of “Chinese Buddhism” and “Southeast Asian Buddhism” by focusing on the lesser-known—yet no less significant—Chinese Buddhist communities of maritime Southeast Asia. By crossing the artificial spatial frontier between China and Southeast Asia, Monks in Motion brings Southeast Asia into the study of Chinese Buddhism and Chinese Buddhism into the study of Southeast Asia.
Chapitres de livres sur le sujet "Maritime connectivity"
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Ducruet, César, Justin Berli, Giannis Spiliopoulos et Dimitris Zissis. « Maritime Network Analysis : Connectivity and Spatial Distribution ». Dans Guide to Maritime Informatics, 299–317. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61852-0_10.
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Kuroiwa, Ikuo, et So Umezaki. « Measuring Connectivity in Global Maritime and Aviation Networks ». Dans Global Value Chains and Industrial Development, 73–103. Singapore : Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-0021-9_4.
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Lippert, Leopold. « Maritime Mobility and the Work of Susanna Rowson : Transatlantic Perspectives ». Dans Maritime Mobilities in Anglophone Literature and Culture, 59–82. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-91275-8_4.
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AbstractThe chapter explores how the work of Susanna Haswell Rowson (1762–1824) employs ships and sea travel as sites of the cultural articulation and negotiation of mobility in the early modern Atlantic world. Through her writings on seafaring, the chapter suggests, Rowson examines the tensions between imperial fantasies of seamless connectivity across the Atlantic world and the typically flawed material and infrastructural conditions that enabled/foreclosed that connectivity. Critically reading the play Slaves in Algiers (1794), the didactic treatise “Rise and Progress of Navigation” (1811), as well as the novels Reuben and Rachel (1798) and Rebecca (1814 edition), the chapter analyzes the ways in which Rowson functionalized maritime mobility in order to deliberate the materiality of transatlantic travel and the ways such travel impacted on the cultural imaginaries of correspondence, circulation, and exchange. Moreover, Rowson used ships and seafaring as narrative devices to relate early U.S. national identities (such as her own) to larger transatlantic contexts. Ultimately, the chapter shows that Rowson’s writing establishes the Atlantic world as a contested and contradictory cultural space that could not always reconcile imperial fantasies of connectivity with the imperfect material conditions of late eighteenth- and early nineteenth-century maritime mobility.
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Majid, Nur Huda Salasa, et Imo Gandakusuma. « How Maritime Connectivity and Crude Oil Price Determine Capital Structure of Maritime Industry in Indonesia ». Dans Proceedings of the 7th Global Conference on Business, Management, and Entrepreneurship (GCBME 2022), 16–25. Dordrecht : Atlantis Press International BV, 2023. http://dx.doi.org/10.2991/978-94-6463-234-7_3.
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De, Prabir. « Indo-Pacific Oceans Initiative (IPOI) : Trade, Connectivity and Maritime Transport ». Dans Thirty Years of ASEAN-India Relations, 551–68. London : Routledge, 2023. http://dx.doi.org/10.4324/9781032617497-36.
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North, Michael. « Mari connessi ». Dans Atti delle «Settimane di Studi» e altri Convegni, 5–25. Florence : Firenze University Press, 2019. http://dx.doi.org/10.36253/978-88-6453-857-0.02.
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Following Fernand Braudel’s Méditerranée, historians interpreted the Mediterranean, Baltic, Atlantic, Indian Ocean or Pacific as closed maritime systems, consisting of multiple micro-environments. This essay seeks to overcome these limited perspectives and to examine, how the various seas and oceans were connected by the Vikings, the Cairo Genizah merchants and the Italian trading companies of the Middle Ages. The second part of my article “Connected Seas” examines the perception and memory of the seas as an element of maritime connectivity. It introduces the concept of realm of memory (lieu de mémoire) into maritime history and tests it in four case studies on the Sound, the Straits of Gibraltar, the Dardanelles and the Straits of Malacca.
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Zhang, Guobin, et Yu Long. « Connectivity and International Law in the 21st Century Maritime Silk Road ». Dans Rethinking the Silk Road, 57–68. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5915-5_3.
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Hoeft, Michal, et Jozef Wozniak. « Evaluation of Connectivity Gaps Impact on TCP Transmissions in Maritime Communications ». Dans Computer Networks, 91–105. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59767-6_8.
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Kapidani, Nexhat, Anja Belojević, Ardian Haçkaj, Đorđije Otašević, Edesa Metaj et Ernesa Kardović. « South Adriatic Connectivity Governance as One of the SAGOV Project Concerns ». Dans The 1st International Conference on Maritime Education and Development, 315–22. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64088-0_28.
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Bour, Guillaume, Karin Bernsmed, Ravishankar Borgaonkar et Per Håkon Meland. « On the Certificate Revocation Problem in the Maritime Sector ». Dans Secure IT Systems, 142–57. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70852-8_9.
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AbstractMaritime shipping is currently undergoing rapid digitalization, but with increasing exposure to cyber threats, there is a need to improve the security of the ship communication technology used during operations across international waters, as well as close to local shores and in ports. To this aid, there are ongoing standardization efforts for an international maritime Public Key Infrastructure, but the inherent properties of limited connectivity and bandwidth make certificate revocation a problematic affair compared to traditional Internet systems. The main contribution of this paper is an analysis of certificate revocation techniques based on how they fulfil fundamental maritime requirements and simulated usage over time. Our results identify CRLs (with Delta CRLs) and CRLite as the two most promising candidates. Finally, we outline the pros and cons with these two different solutions.
Actes de conférences sur le sujet "Maritime connectivity"
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Bauk, Sanja. « Blockchain conceptual framework in shipping and port management ». Dans Maritime Transport Conference. Universitat Politècnica de Catalunya. Iniciativa Digital Politècnica, 2022. http://dx.doi.org/10.5821/mt.10848.
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The purpose of the paper is to present a conceptual framework of blockchain (BC) deployment in shipping and port management, which encompasses distributed relational database (DB) and crypto-currency payment mechanism as main constructs. The core of the model is TradeLens platform. The document workflow management, financial processes and device connectivity are key scenarios in the proposed framework. The stakeholders play the role of traditional intermediaries in goods, accompanied data, and documents flows, including overall supervision of the processes between end-nodes, that is shippers (consignees) and customers (consumers). The paper identifies some strengthens and frailty of blockchain-based maritime supply chain system and proposes further investigation in this domain, towards better understanding prospective development of blockchain across maritime cluster.
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Yu Ge, Peng-Yong Kong, Chen-Khong Tham et Jaya Shankar Pathmasuntharam. « Connectivity and route analysis for a maritime communication network ». Dans 2007 6th International Conference on Information, Communications & Signal Processing. IEEE, 2007. http://dx.doi.org/10.1109/icics.2007.4449621.
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Kolehmainen, Antti, Miika Komu, Sepehr Javid, Jimmy Kjäillman, Tero Kauppinen, Fayezeh Ghavimi et Bilhanan Silverajan. « Benchmarking of Emulated Wireless Edge Cloud Connectivity for Maritime Environments ». Dans 2022 IEEE 8th World Forum on Internet of Things (WF-IoT). IEEE, 2022. http://dx.doi.org/10.1109/wf-iot54382.2022.10152152.
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Kolios, Panayiotis, et Lambros Lambrinos. « Optimising file delivery in a maritime environment through inter-vessel connectivity predictions ». Dans 2012 IEEE 8th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob). IEEE, 2012. http://dx.doi.org/10.1109/wimob.2012.6379163.
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Xing, Miao, Xianliang Shi et Weijian Zhang. « Connectivity Reliabilitsy of Container Shipping Network of the 21st Century Maritime Silk Road ». Dans 2018 5th International Conference on Industrial Economics System and Industrial Security Engineering (IEIS). IEEE, 2018. http://dx.doi.org/10.1109/ieis.2018.8598142.
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Rusfa, Rusfa, Muhamad Mujahidin et Sapta Nugraha. « Potential Use of Antennas In Rural Areas To Improve Internet Connectivity ». Dans Proceedings of the 2nd Maritime Continent Fulcrum International Conference, MaCiFIC 2022, September 28-October 1, 2022, Tanjungpinang, Indonesia. EAI, 2023. http://dx.doi.org/10.4108/eai.28-9-2022.2328381.
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Chen, Xin, et David Michelson. « Setting Technical Requirements for Intra-Ship Maritime Communication Services Over 3GPP Systems ». Dans SNAME 14th International Marine Design Conference. SNAME, 2022. http://dx.doi.org/10.5957/imdc-2022-280.
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The first 3GPP Technical Specification covering service requirements (Stage 1) for the support of maritime communication (MARCOM) over 3GPP systems (TS 22.119) was approved in December 2018 at the TSG SA Plenary meeting in Sorrento. It represents one of several 3GPP initiatives that aim to ensure that future 3GPP/5G systems meet the needs and requirements of a variety of vertical domains and result in a unified communication platform for a broad set of industrial applications. In particular, TS 22.119 has the potential to support both a new wave of Global Maritime Distress and Safety System (GMDSS) modernization and broader 5G maritime services. Despite efforts by 3GPP to engage IALA, IMO, and other groups within the maritime community, much work remains in realising the full potential of this effort. One of the strengths of the 3GPP approach is the manner in which common requirements are re-used by different groups. To this end, wherever possible, the groups will take existing service requirements from 3GPP Stage 1 specifications. Maritime is a good example of this principle, with more general Mission Critical needs covered in other specifications, allowing TS 22.119 to be the deliverable that identifies only specific maritime needs including the service requirements for the support of autonomous shipping and the broader digitalization and mobilization of maritime shipping. Here, we propose a framework that will help to reveal new and emerging wireless system requirements for 3GPP systems in shipboard environments. In the first phase, we consider a current ship within which current wireless technology is deployed. Such scenarios are characterized by a limited set of use cases, a brute-force approach to design and deployment, a disconnect between the reference environments for which the wireless technology was developed, and the new operating environment. The result is suboptimal performance with glaring deficiencies. To a large extent, this is where we are today as technologies such as Wi-Fi, ZigBee, and Bluetooth are deployed aboard ship. In the second phase, airlink and radio resource management are modified to meet the needs of the new operating environment. Different service level requirements are identified, and more ambitious applications are deployed. At this stage, the primary impact is on shipboard operations with relatively little impact on ship design. To a large extent, this reflects the majority of current forward looking thinking concerning the application of wireless technology aboard ship today. In the third phase, ship design & construction are modified, subtly or otherwise, to account for both the nature of wireless propagation and the implications of the enhanced connectivity. In some cases, this may include lessons learned that allow crew sizes to be reduced, perhaps dramatically, in light of significant increases in the depth and sophistication of shipboard automation. We believe that this approach is well suited to bridging the gaps between wireless developers, naval architects, and standards developers, and contribute to the long-term success of efforts such as TS 22.119.
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Ivasiuk, N. A. « To the questions of formation of collective thinking through the connectivism educational principle in distant learning in Maritime English on Unified Communication Platform ». Dans PHILOLOGICAL SCIENCES, INTERCULTURAL COMMUNICATION AND TRANSLATION STUDIES : AN EXPERIENCE AND CHALLENGES. Baltija Publishing, 2021. http://dx.doi.org/10.30525/978-9934-26-073-5-2-66.
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Roy, Ting, Kamel Ben Naceur, Casey Harrison, James Shelton, Aaron Hall, Ian Henkes, Kenny Jones, Christian Wilkinson, Hifzi Ardic et Indranil Roy. « Field Deployment of a Novel Shaped Charge with Intelligent Tracers Integrated in its Degradable High Entropy Alloy (HEA) Liner for a Clean, Low-Skin, Perforation Tunnel ». Dans SPE International Hydraulic Fracturing Technology Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/215652-ms.
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Abstract A debris free, clean perforating tunnel with lower skin offers better reservoir connectivity, better production and slower decline. An equal entry diameter perf-hole (EHD) creates a uniform "sprinkler" system offering less resistance during stimulation and high cluster efficiency. A larger EHD has several benefits, primarily it will lower "Perf Friction" (Pf), allowing lower treatment pressures, greater flow across each perforation, less chances of a screen out, uniform drainage, and engineered completions where larger EHD perforations can be placed at the "Toe" with decreasing EHD perforations towards the "Heel" to offset the effects of wellbore fluid friction. The first field introduction of CLEAR charges was conducted in 5 different Permian wells in diverse shale plays and burial depths, with frac-gradients from 0.65 psi/ft to 0.90 psi/ft. To assess its performance and establish its superiority, commercial equal hole charges of equivalent 0.4-inch EHD were shot in parallel to CLEAR charges every other stage in these wells. In addition, to establish the effect of a larger EHD on stimulation, 0.5-inch EHD tracer charges were shot in 10 randomized stages in each of these wells. Field test results helped established the effects of clean perforation tunnels, with reduced perf friction even in consolidated formations with high frac gradients, a lowering of time to design rate, pad volumes, also bettering other key performance metrics. Recently there has been a lot of advancement in the area of "Nanoparticle Tracers" which are being evaluated as means for remote sensing. In frac operations such tracers can be functionalized for deployment in reservoirs to remotely monitor stage performance from zonal returns of the nanoparticles to surface with flowback. Combining these concepts has led to a game-changing application, an industry first tracer shaped charge with high entropy degradable alloy (HEA) liner for a slug and debris free, clean perforating tunnel with low skin. A novel study was undertaken to deploy nanoparticle tracers in reservoirs via shaped charges. Classified and functionalized rare earth oxide nanoparticles manifesting unique emission and absorption spectra and engineered decay times based on their optical, physical, luminescent properties, are identifiable in parts per billion (ppb) dilution. These were designed to survive detonation events and integrated in the HEA charge liners. Flowback emulsions sampled from client wells were scanned with collimated light of tailored wavelength to acquire unique after-glow tracer spectra. The presence of the meta-material tracers in the flowback samples confirmed successful return of the nano-particulates to the surface. Expanding the scope of application(s) of intelligent tracers to related domains, we envision getting a better understanding of the dissolution and precipitation of minerals and its impact on the transport of fluids in porous media as essential to various subsurface applications, including shale gas production using hydraulic fracturing ("fracking"), CO2 sequestration, or geothermal energy extraction. In our paper we discuss patent pending concepts to experimentally study this phenomenon at lab scale (Phase – I of the study) and develop an effective high temperature scale inhibitor with integrated (functionalized) REO tracers to map fractured rock and determine initial permeability of the rock. Flushing and inducing scale formation in the pore structure and fracture network, studying the loss in permeability over time with varying environmental parameters (pressure and temperature) will allow calibrating and tuning the HT scale inhibitor, making it an effective treatment of injection fluids / formation flush for EGS. Use of these novel large EHD tracer charges for "Carbonate Acidizing" in the Middle East and North Africa (MENA), where approaches are highly dependent on the rate of mass transfer should be a game changer. During matrix acidization, low injection rates lead to a Damköhler number > 1, where rapid acid reaction results in face dissolution and an ineffective treatment (Hoefner, M.L. and Fogler, H.S. 1988). Larger EHD perforations relieve this bottleneck (Fredd C.N. 2000). Our novel HEA degradable liners are expected to bridge these unmet technology gaps. Last but not least, scaling up for commercialization of our large EHD tracer charges, encompasses transport of classified and blended raw powdered raw materials used in the CLEAR High Entropy Alloy (HEA), several of which are considered Dangerous Goods (DG). Shipping by land, sea or air, as such is governed by various country specific and international codes or regulations. These include the Code of Federal Regulation Title 49 in the US (49CFR 100-180), the Transport of Dangerous Goods Regulations (TDGR) in Canada, Technical Instructions for the Safe Transport of Dangerous Goods by Air (ICAO TI), International Air transport Association Dangerous Good regulations (IATA DGR), International Maritime Dangerous Goods Code (IMDG), and International Carriage of Dangerous Goods by Road (ADR). Alongside obtaining Federal Explosives License (FEL), compliance to The Hazard Communication Standard (HCS) (29 CFR 1910.1200(g)) by providing safety data sheets (SDS) to specific markets, meeting local requirements have been adhered. This has been highlighted in our article.
Rapports d'organisations sur le sujet "Maritime connectivity"
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Bain, Rachel, David Young, Marin Kress, Katherine Chambers et Brandan Scully. US port connectivity and ramifications for maintenance of South Atlantic Division ports. Engineer Research and Development Center (U.S.), janvier 2023. http://dx.doi.org/10.21079/11681/46385.
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This study utilized automatic identification system (AIS) data to quantify vessel traffic patterns within a predominantly US port network from 1 January 2009 to 31 December 2020, with the methods validated using independent data sets collected between 1 January 2015 and 31 December 2019. The analysis focused on South Atlantic Division (SAD) ports. AIS-derived data characterized individual ports’ traffic and port-to-port connectivity for the network. With foreign vessel entrances and clearances (E&C) data, the AIS-reported vessel characteristics enabled calculation of ships’ physical volume, which was a reasonable proxy for tonnage at many SAD ports. The PageRank algorithm was then applied to port-to-port traffic, revealing how individual ports participate in cargo movement through the network. PageRank scores also provided insight into the maritime supply chain beyond traditional traffic metrics. For example, many East Coast SAD ports ranked higher by PageRank than by raw tonnage. Because of the supply chain implications of shared vessel traffic, PageRank scores can augment tonnage metrics when prioritizing channel and infrastructure maintenance. Vessel volume, port-to-port connectivity, and PageRank scores reveal maritime supply chain resilience by identifying alternative destinations for cargo bound for disrupted ports, robustness across supply chains, and the effects of seasonality and disruptions.
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Kress, Marin, David Young, Katherine Chambers et Brandan Scully. Measuring maritime connectivity to Puerto Rico and the Virgin Islands using Automatic Identification System (AIS) data. Engineer Research and Development Center (U.S.), août 2023. http://dx.doi.org/10.21079/11681/47495.
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The purpose of this Coastal and Hydraulics Engineering technical note (CHETN) is to summarize a portion of recently published work (Young, Kress, et al. 2022) that used archival Automatic Identification System (AIS) data to measure the commercial vessel traffic connected to Puerto Rican and US Virgin Island (USVI) port areas from January 2015 to June 2020. Vessel movement derived from AIS was aggregated to construct a network that measured the port-to-port connectivity for all ports in the network and the interconnectivity of traffic between those ports. AIS data provided a description of vessel movement and the identification of specific vessel classes. Metrics such as interconnectedness can be used in conjunction with standard US Army Corps of Engineers (USACE) metrics describing waterway utilization, which traditionally have included total tonnage and specific commodity tonnage. The ability to consider the self-selected vessel-type broadcast via AIS, as well as dominant commodity type and tonnage reported through statistical publications, provides a fuller and more accurate description of waterway capacity utilization. This knowledge, along with port-to-port interconnectedness, reveals potential redundancies between ports, robustness across supply chains, and the impacts of seasonality, thereby allowing the USACE to expand its understanding of maritime supply-chain resilience.
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Lucenti, Krista. Caribbean Regional Action Plan on Freight Logistics, Maritime Transport and Trade Facilitation. Inter-American Development Bank, décembre 2014. http://dx.doi.org/10.18235/0009250.
Texte intégralRésumé :
The Caribbean's location at the crossroads of global container shipping routes gives the region excellent maritime connectivity that could translate into significant commercial opportunities. Given its heavy dependence on trade, Caribbean authorities are increasingly vested in improving the efficiency of supply chains and addressing issues related to maritime transport and logistics. In the context of the Panama Canal expansion, it is of the utmost important that steps be taken immediately to strengthen the Caribbean's position in global maritime trade routes. The Caribbean Regional Action Plan on Freight Logistics, Maritime Transport and Trade Facilitation reviews the status of trade and transport infrastructure in the Caribbean Basin, with particular emphasis on CARIFORUM countries. The study highlights the main trends in global and regional trade flows in the region, estimates the impact of these trends on the shipping industry and selected Caribbean Basin ports, and proposes a regional Action Plan for taking advantage of new commercial opportunities.
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Kress, Marin, David Young, Katherine Chambers et Brandan Scully. AIS data case study : quantifying connectivity for six Great Lakes port areas from 2015 through 2018. Engineer Research and Development Center (U.S.), mai 2021. http://dx.doi.org/10.21079/11681/40720.
Texte intégralRésumé :
This Coastal and Hydraulics Engineering Technical Note (CHETN) presents results from a preliminary examination of commercial vessel traffic connectivity between six major port areas on the Great Lakes using Automatic Identification System (AIS) data collected from 2015 to 2018. The six port areas included in this study are Calumet Harbor, IL and IN; Cleveland, OH; Detroit, MI; Duluth-Superior, MN and WI; Indiana Harbor, IN; and Two Harbors, MN. These six locations represent an important subset of the more than 100 federally authorized navigation projects in the Great Lakes maintained by the US Army Corps of Engineers (USACE). The results are presented in the context of USACE resilience-related policy initiatives as well as the larger topic of maritime system resilience.
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Hossain, Niamat Ullah Ibne, Farjana Nur, Raed Jaradat, Seyedmohsen Hosseini, Mohammad Marufuzzaman, Stephen Puryear et Randy Buchanan. Metrics for assessing overall performance of inland waterway ports : a Bayesian Network based approach. Engineer Research and Development Center (U.S.), mai 2021. http://dx.doi.org/10.21079/11681/40545.
Texte intégralRésumé :
Because ports are considered to be the heart of the maritime transportation system, thereby assessing port performance is necessary for a nation’s development and economic success. This study proposes a novel metric, namely, “port performance index (PPI)”, to determine the overall performance and utilization of inland waterway ports based on six criteria, port facility, port availability, port economics, port service, port connectivity, and port environment. Unlike existing literature, which mainly ranks ports based on quantitative factors, this study utilizes a Bayesian Network (BN) model that focuses on both quantitative and qualitative factors to rank a port. The assessment of inland waterway port performance is further analyzed based on different advanced techniques such as sensitivity analysis and belief propagation. Insights drawn from the study show that all the six criteria are necessary to predict PPI. The study also showed that port service has the highest impact while port economics has the lowest impact among the six criteria on PPI for inland waterway ports.
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Pacific Transport Sector Assessment, Strategy, and Road Map 2021–2025. Asian Development Bank, juillet 2021. http://dx.doi.org/10.22617/sgp210255-2.
Texte intégralRésumé :
This publication highlights key transport issues in the Pacific developing member countries of the Asian Development Bank (ADB) and sets out ADB’s planned 2021–2025 transport sector operations in the region. These operations, based on domestic and regional sector priorities and ADB’s Strategy 2030, aim to help countries prepare for and respond to shocks, deliver sustainable services, and promote inclusive growth. The publication covers maritime, land, and urban transport; aviation; and intermodal connectivity. It discusses climate change adaptation and disaster risk management, regional cooperation and integration, institutional capacity, gender equality, land ownership, and procurement. It is linked to ADB’s Pacific Approach strategy document.