An Ontology for Submarine Feature Representation on Charts

A landform is a subjective individuation of a part of a terrain. Landform recognition is a difficult task because its definition usually relies on a qualitative and fuzzy description. Achieving automatic recognition of landforms requires a formal definition of the landforms properties and their modelling. In the maritime domain, the International Hydrographic Organisation published a standard terminology of undersea feature names which formalises a set of definition mainly for naming and communication purpose. This terminology is here used as a starting point for the definition of an ontology of undersea features and their automatic classification from a terrain model. First, an ontology of undersea features is built. The ontology is composed of an application domain ontology describing the main properties and relationships between features and a representation ontology deals with representation on a chart where features are portrayed by soundings and isobaths. A database model was generated from the ontology. Geometrical properties describing the feature shape are computed from soundings and isobaths and are used for feature classification. An example of automatic classification on a nautical chart is presented and results and on-going research are discussed

Landscape terms and place names in the Trobriand Islands - The Kaile'una subset

After a brief introduction to the topic the paper first gives an overview of Kilivila landscape terms and then presents the inventory of names for villages, wells, island points, reef-channels and gardens on Kaile’una Island, one of the Trobriand Islands in the Milne Bay Province of Papua New Guinea. The data on the meaning of the place names presented were gathered in 2004 with six male consultants (between the age of 36 and 64 years) living in the village Tauwema on Kaile’una Island. Thus, the list of place names is quite possibly not the complete sample, but it is reasonably representative of the types of Kilivila place names. After discussing the meaning of these terms the paper presents a first attempt to typologically classify and categorize the place names. The paper ends with a critical discussion of the landscape terms and the proposed typology for place names

Anthropocene Islands: there are only islands after the end of the world

Many Anthropocene scholars provide us with the key take home message that they are writing ‘after the end of the world’. Not because they are writing about apocalypse, but because they are engaging the Anthropocene after the profound crisis of faith in Western modernity which has swept across academia in recent decades. Here the dominant problematic of contemporary Anthropocene thinking has rapidly turned away from modernity’s human/nature divide to that of ‘relational entanglements’ (Weinstein and Colebrook, 2017; Giraud, 2019). Thus, Anthropocene scholarship is taking a particular interest in geographical forms and cultures which are held to bring this problematic to the fore for more intensive interrogation. In this paper we examine how the figure of the island as a liminal and transgressive space has facilitated Anthropocene thinking, working with and upon island forms and imaginations to develop alternatives to hegemonic, modern, ‘mainland’ or ‘one world’ thinking. Thus, whilst islands, under modern frameworks of reasoning, were reductively understood as isolated, backward, dependent, vulnerable and in need of saving by others, the island is being productively re-thought in and for more recent Anthropocene thinking. We explain how islands have shifted from the margins to the centre of many international debates, becoming emblematic sites for understanding relational entanglements, enabling alternative forms of thought and practice in the Anthropocene

Marine conservation in Vanuatu: Local conceptualisation and 'assemblage'

This article deals with the local conceptualisation of 'conservation' in the village Siviri in Vanuatu where villagers have established and maintain a small marine conservation area. Looking at villagers' motivations, the aim is to carve out the local conceptualisation and practice of 'conservation', to show what conservation is for the villagers. The theoretical framework is a combination of two approaches, namely 'assemblage' and 'world-making'. Conservation in Siviri is ontologically different from the concept of conservation used in Vanuatu national policy. It can be regarded as a creative engagement of villagers with their environment(s) to preserve the specific world-making assemblage consisting of humans and marine life for future generations

The Primacy of Openness in Ecological Complexity Theory

Five principles are at the foundation of complex systems theory: emergence, openness, contingency, historicity, and indeterminacy. Of those five, the principle of emergence is easily the most prevalent. Simply put, emergence refers to the idea that some wholes cannot be properly accounted for by appealing to individual explanations of the parts that compose it. In ecological complexity theory, the principle of emergence is strongly associated with the self-organizing feedbacks that often identify the structural framework of ecosystems. Within the last half century, the intense focus on the principle of emergence has engendered the development of many conceptual distinctions that have importantly contributed to explanations of ecological patterns and ideas about environmental management and restoration. I argue, however, that ecological complexity theory has become somewhat stagnant and myopic in its devout commitment to the principle of emergence. This dissertation highlights the issue of ecological complexity theory’s overreliance on the principle of emergence by investigating the role of the principle of openness. I argue the reverse of what is typically maintained in the literature – the principle of openness possesses metaphysical, epistemological, and ethical primacy. By beginning with the principle of openness and working towards the use of the principle of emergence in explanations of ecological phenomena, I urge greater appreciation for an ecosystem’s complete causal narrative and a reconsideration of the formulation and carrying out of future management and restoration practices and policies

Securing Unity and Reverence: Chinese ontological security across its maritime and frontier disputes

This thesis draws on the Constructivist school of International Relations, applying the theory of ontological security to explain diverging patterns of behaviour by China across its maritime and frontier territorial disputes. Since the establishment of the People’s Republic of China, these patterns have seen China consistently interact with states adjacent to its frontiers to settle disputes peacefully, with occasional instances of conflict. Conversely, in its maritime disputes, though varying in its levels of aggression and cooperation, China has resolutely refused to settle with disputant states. In examining these varying behaviours, it is argued that differences derive from the differing ability of China to secure its national identity between the two types of dispute. Analysing the examples of the Sino-Indian dispute and border war, the Burmese border agreement, and the ongoing South China Sea disputes, periods of conflict and settlement in these disputes are compared to changing manifestations of Chinese national identity. What results is an illustration of frontier border settlement contributing to the security of China’s identity as a unified, pluralistic nation state. The absence of national minority populations in relation to maritime disputes alternatively sees continued interaction in these disputes as securing China’s identity as the superior ‘Central Kingdom’ relative to peripheral South East Asian states, while offering little incentive for settlement. Both types of dispute can be viewed as contributing to the biographical narrative of China’s ‘Century of Humiliation’. This thesis presents a significant departure from existing studies of China’s disputes, predominantly undertaken from a Realist perspective. Additionally, it expands on existing Constructivist literature by demonstrating how national identity can result in a range of behaviours across a range of differing disputes, further validating the emerging ontological security approach within International Relations scholarship

An ontology for the generalisation of the bathymetry on nautical charts

On nautical charts, undersea features are portrayed by sets of soundings (depth points) and isobaths (depth contours) from which map readers can interpret landforms. Different techniques were developed for automatic soundings selection and isobath generalisation from a sounding set. These methods are mainly used to generate a new chart from the bathymetric database or from a large scale chart through selection and simplification however a part of the process consists in selecting and emphasising undersea features on the chart according to their relevance to navigation. Its automation requires classification of the features from the set of isobaths and soundings and their generalisation through the selection and application of a set of operators according not only to geometrical constraints but also to semantic constraints. The objective of this paper is to define an ontology formalising undersea feature representation and the generalisation process achieving this representation on a nautical chart. The ontology is built in two parts addressing on one hand the definition of the features and on the other hand their generalisation. The central concept is the undersea feature around which other concepts are organised. The generalisation process is driven by the features where the objective is to select or emphasise information according to their meaning for a specific purpose. The ontologies were developed in Proteg´ e and a bathymetric database server integrating the ontology was ´ implemented. A generalisation platform was also developed and examples of representations obtained by the platform are presented. Finally, current results and on-going research are discussed

Projecting the Intramural ASEAN Norms into Extramural Terrain - Constructivism: Does TAC Work in the South China Sea?

Abstract: This article examines the role of ASEAN's norms in managing dispute over the South China Sea.ASEAN shares the beliefs that the settlement of differences or disputes by peaceful means and the abandonmentof the threat or use of force are necessary to ensure the stability over the region. It attempts to analyze thepossibility of exporting this intramural norm of ASEAN's model of dispute settlement into an extramural terrainand seeks to answer the question whether ASEAN's norm of cooperation can alter claimants' perception towardseach other, and thus in return will constrain the urge to solve the dispute by force.Keywords : ASEAN norm, ASEAN's model of dispute settlements, TAC, South China Sea, Chin

Understanding coral dispersal

textUnderstanding the factors influencing species ranges and dispersal are becoming increasingly important as climate change alters species distributions worldwide. If species are to persist, life-history strategies must rapidly evolve to accommodate shifting environments. This dissertation assesses the factors modulating dispersal in corals. First, I examined if there were any systematic differences in settlement between Indo-Pacific and Caribbean coral larvae that might explain Caribbean recruitment failures. No differences were observed, however I detected significant divergences in settlement cue preferences among coral species across both the Caribbean (Diploria strigosa, and Montastraea franksi) and the Indo-Pacific (Acropora tenuis, A. millepora, and Favia lizardensis), even for coral larvae from the same reef. Secondly, I established the extent of coral dispersal between remote reefs. I evaluated the genetic diversity and divergence across Micronesia for two coral species and investigated if these islands served as a connectivity corridor between the Indo-West-Pacific (Coral Triangle) and the Central Pacific. I found isolation-by-distance patterns whose strength depended on species, suggesting these corals are not panmictic across their ranges and that island stepping-stones facilitate gene flow to remote Pacific reefs. Next, I investigated genetic structure of symbionts in these same corals, to see if horizontally transmitted symbionts are less dispersive than their coral hosts. Symbiont genetic divergence between islands was an order of magnitude larger than host divergence and both host species and environment modulated symbiont composition. These results suggest that symbiont populations are host-specific and associating with local symbionts might be a mechanism for broadly dispersing corals to adapt locally. Lastly, I estimated heritable variation in dispersal-related traits in coral larvae. I observed strong heritable variation in gene expression, as well as parental effects on two phenotypic traits, settlement and fluorescence. I observed that patterns of differential expression in three-day-old larvae predicted variation in settlement and fluorescence two days later. Correlations between proteoglycan expression and settlement suggest that the larval extracellular matrix plays a role in settlement. Down-regulation of ribosomal proteins and differential expression of oxidative stress genes correlated with increasing fluorescence, possibly indicating reduced growth and increased stress. Overall, this dissertation contributes to our knowledge of factors affecting coral dispersal and the potential for evolution of dispersal-related traits.Ecology, Evolution and Behavio