Bibliographies thématiques / Explorers and exploration

Littérature scientifique sur le sujet « Explorers and exploration »

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Publié le 26 juillet 2024

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Articles de revues sur le sujet "Explorers and exploration"

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Middleton, Dorothy, et Ian Cameron. « Explorers and Exploration ». Geographical Journal 159, no 1 (mars 1993) : 99. http://dx.doi.org/10.2307/3451519.

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Lee, Michael M. « The robot explorers ». Science Robotics 6, no 55 (30 juin 2021) : eabj8903. http://dx.doi.org/10.1126/scirobotics.abj8903.

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WOODBURY, R., A. BURROW, S. DATTA et T.-W. CHANG. « Typed feature structures and design space exploration ». Artificial Intelligence for Engineering Design, Analysis and Manufacturing 13, no 4 (septembre 1999) : 287–302. http://dx.doi.org/10.1017/s0890060499134048.

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Design space explorers are computer programs that play on an exploration metaphor to support design. They assist designers in creating alternative designs by structuring the process of design creation in a space of alternatives. Subsidiary metaphors relevant to design space explorers are generation, navigation, and reuse. This paper introduces, in two sketches, typed feature structures as a formal system in which a design space explorer and its knowledge level might be implemented. First, informal and abstract properties of typed feature structures suffice to build a sketch of the behavior of a design space explorer. Second, using an example based on single-fronted cottages (a common Australian housing type), we outline the typed feature structure machinery most relevant to design space exploration.
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Shah, Agam. « Robot Explorers ». Mechanical Engineering 140, no 07 (1 juillet 2018) : 30–35. http://dx.doi.org/10.1115/1.2018-jul-1.

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Robotic space probes have proven themselves to be capable explorers, roaming the solar system, observing the galaxy, and pushing back the boundaries of the final frontier. Those looking for a return to the glory days of human space exploration will need patience. NASA is aiming for a human landing on Mars in the 2030s, though cynics might contend that a Mars mission has been “just over the horizon” for a generation. Private-sector efforts in the near term are limited to suborbital tourism. Fortunately, NASA, the European Space Agency, and groups from other countries are readying a variety of missions that should answer some of astronomy’s biggest questions, all while keeping human feet firmly on the ground. In this article, we review nine unmanned missions that will explore new frontiers in space over the next decade.
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Luzzi, Tiziana. « Global exploration hotspots — where are explorers prioritizing ? » First Break 39, no 5 (1 mai 2021) : 71–75. http://dx.doi.org/10.3997/1365-2397.fb2021038.

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Birkett, D. « Technology - Exploration : Disabled explorers reach new heights ». Engineering & ; Technology 14, no 7 (1 août 2019) : 54–57. http://dx.doi.org/10.1049/et.2019.0724.

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Pankine, A. A., K. M. Aaron, M. K. Heun, K. T. Nock, R. S. Schlaifer, C. J. Wyszkowski, A. P. Ingersoll et R. D. Lorenz. « Directed aerial robot explorers for planetary exploration ». Advances in Space Research 33, no 10 (janvier 2004) : 1825–30. http://dx.doi.org/10.1016/j.asr.2003.07.049.

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Middleton, Dorothy, et Helen Delpar. « The Discoverers : An Encyclopedia of Explorers and Exploration ». Geographical Journal 152, no 1 (mars 1986) : 116. http://dx.doi.org/10.2307/632982.

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Decalf, Carole, et German Molina. « Introduction to this special section : Basin exploration ». Leading Edge 40, no 3 (mars 2021) : 170. http://dx.doi.org/10.1190/tle40030170.1.

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Originally, explorers relied on hydrocarbon seeps and 2D seismic lines to define a basin's petroleum potential and to identify its best part. Due to dramatic improvements in seismic technology, today's explorers have access to a vast seismic tool kit, from basin-scale regional 3D seismic surveys to neural network techniques that directly derive reservoir properties from seismic volumes. However, in frontier or mature exploration, geoscientists are often limited by the amount of well data and rock properties information available, and they may deal with poor(er) seismic that makes seismic calibration difficult. Successful explorers will require a lot of knowledge-based creativity to derive meaningful geologic and reservoir properties models to reduce exploration risk. By embracing uncertainties, explorers develop “outside-the-box” thinking to help them chase the hydrocarbon molecules and unlock the prize. With their knowledge in rock physics, subsurface deformation, and wave propagation, geoscientists are deploying new methodologies and tools to fill the data gap and produce an improved description of the subsurface.
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Geary, Andrew. « SEG EVOLVE continues to develop fearless explorers ». Leading Edge 39, no 1 (janvier 2020) : 10–14. http://dx.doi.org/10.1190/tle39010010.1.

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Thèses sur le sujet "Explorers and exploration"

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Dritsas, Lawrence Stratton. « Local Informants and British Explorers : the Search for the Source of the Nile, 1850-1875 ». Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/35306.

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My thesis describes the praxis of geographical exploration in the mid-nineteenth century through the activities of members of the Royal Geographical Society of London (RGS). I focus on the First East African Expedition (1856-1859), which was led by Richard F. Burton. Geographical exploration was intended to provide data that would allow geographers in Britain to construct an accurate description of East Africa, with emphasis on the rivers and lakes that may contribute to the waters of the Nile and ethnographic research. Earlier geographies of the East African interior had relied upon a variety of sources: ancient, Arab, Portuguese, and local informants. In order to replace these sources with precise observation, the RGS provided some prescriptive instructions to explorers based upon the techniques of celestial navigation and surveying available for field research in the 1850s. The instructions emphasized careful, daily recording of data, using instruments as much as possible. However, in the field explorers experienced a diminished ability to control the consistency of their observations due to insufficient finances, politics, disease, and climate. Where unable to directly observe, they relied upon local informants for descriptions of the regional geography. These informants had a great impact upon the geographies produced by the expedition. In order to complete a full description of the praxis of geographical exploration it therefore becomes necessary to consider the expedition in its wider context--as a remote sensing tool for a scientific society and as a contingent of foreigners visiting a region for which they have little information and entered only with local permission. I propose that five steps, or contexts, must be considered during the analysis of expeditions: contact, acquisition, appropriation, reporting, meta-analysis. These steps make lucid the epistemic transformations that must take place as explorers gather data in the field. At each stage the identity of the individuals involved are contingent upon their relationship with each other and the information they desire. The relationship between explorers and local informants was especially critical to the establishment of credibility. Even when fully trusted by explorers, the British geographers who analyzed expedition data and generated maps of the region debated the veracity of local informants. Explorers (and by extension, local informants) found that other researchers, through the meta-analysis of expedition reports, appropriated any ownership of the information produced by expeditions.
Master of Science
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Murray, Katie. « Memorials of endurance and adventure : exhibiting British polar exploration, 1819-c.1939 ». Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/11087.

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Over eighty polar-themed exhibitions were held in Britain between 1819 and the 1930s, a time of intense exploration of both the Arctic and Antarctic. These varied from panoramas and human exhibits to displays of ‘relics', equipment, photographs and artwork, waxworks and displays shown as part of a Great Exhibition. This period also saw the creation of the first dedicated polar museums. These displays were visited by thousands of people throughout the country, helping to mediate the subject of exploration for a public audience. Despite this, the role exhibitions played in forming popular views of the polar regions has not been fully assessed. This thesis addresses this gap. It is the first to consider all the polar exhibitions held during this period as a collective body, making it possible to study how they developed over time and in response to changing circumstances. The thesis uses a variety of archival sources to both reconstruct the displays and place them in their historical and museological contexts. The study shows that exhibitions evolved in response to changes both in the museum sector and in exploration culture. It demonstrates that, while they were originally identified with the shows of the entertainment industry, polar exhibitions began to take on more of the characteristics of museum displays. At the same time their dominant themes changed; the natural world was relegated in favour of ideas relating to the human experience of the regions such as heroism, adventure and everyday life in an exotic environment. While other media may have been more effective in disseminating ideas about exploration, visitors could find the experience of visiting an exhibition more compelling. This thesis contributes to our understanding of this distinct role that exhibitions played in presenting the polar regions to the British public.
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Liegel, Roy 1940. « Paradigms of experiencing the new in Pacific voyages and explorations ». Monash University, German Studies, 2001. http://arrow.monash.edu.au/hdl/1959.1/9156.

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Teo, Leonghwee. « Modeling Goal-Directed User Exploration in Human-Computer Interaction ». Research Showcase @ CMU, 2011. http://repository.cmu.edu/dissertations/681.

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Designing user-interfaces so that first-time or infrequent users can accomplish their goals by exploration has been an enduring challenge in Human-Computer Interaction. Iterative user-testing is an effective but costly method to develop user-interfaces that support use through exploration. A complementary method is to use modeling tools that can generate predictions of user exploration given a user-interface and a goal description. Recent computational models of goal-directed user exploration have focused on predicting user exploration of websites and demonstrated how predictions can inform user-interface design. These models employ the common concepts of label following and information scent: that the user's choice is partly determined by the semantic relevance between the user's goal and the options presented in the user-interface. However, in addition to information scent, other factors including the layout position and grouping of options in the user-interface also affect user exploration and the likelihood of success. This dissertation contributes a new model of goal-directed user exploration, called CogTool- Explorer, which considers the layout position and the grouping of options in the user-interface in concert with a serial evaluation visual search process and information scent. Tests show that predictions from CogTool-Explorer match participant data better than alternative models that do not consider layout position and grouping. This dissertation work has also integrated the CogTool- Explorer model into an existing modeling tool, called CogTool, making it easier for other researchers and practitioners to setup and generate predictions of likely user exploration paths and task performance using CogTool-Explorer.
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Gauss, Veronica A. « A fuzzy logic solution for navigation of the Subsurface Explorer planetary exploration robot ». Thesis, This resource online, 1997. http://scholar.lib.vt.edu/theses/available/etd-08222008-063102/.

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Tremblay, Pierre-Jules. « The skeptical explorer : a multiple-hypothesis approach to visual modelling and exploration ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0007/MQ44046.pdf.

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Matheron, Guillaume. « Integrating motion planning into reinforcement learning to solve hard exploration problems ». Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS348.

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Dans cette thèse, nous étudions les façons dont des techniques inspirées de la planification de mouvement peuvent accélérer la résolution de problèmes d'exploration difficile pour l'apprentissage par renforcement, sans sacrifier la généralisation ni les avantages de l'apprentissage sans modèle. Nous identifions une impasse qui peut advenir lors qu'on applique l'apprentissage par renforcement à des problèmes apparemment triviaux mais qui ont une récompense éparse. De plus, nous contribuons un algorithme d'exploration inspiré de la planification de mouvement mais conçu spécifiquement pour des environnements d'apprentissage, ainsi qu'un cadre pour utiliser les données collectées pour entraîner un algorithme d'apprentissage par renforcement dans des scénarios auparavant trop complexes
Motion planning is able to solve robotics problems much quicker than any reinforcement learning algorithm by efficiently searching for a viable trajectory. Indeed, while the main object of interest in the field of Reinforcement Learning is the behavior of an agent, Motion Planning is concerned with the geometry and properties of the state-space, and uses a different set of primitives to achieve more efficient exploration. Some of these primitives require a model of the system and are not studied in this work, others such as reset-anywhere are only available in simulated environments. In contrast, Motion Planning approaches do not benefit from the same generalization properties as the policies produced by reinforcement learning. In this thesis, we study the ways in which techniques inspired from motion planning can speed up the solving of hard exploration problems for reinforcement learning without sacrificing the advantages of model-free learning and generalization. We identify a deadlock that can occur when applying reinforcement learning to seemingly-trivial sparse-reward problems, and contribute an exploration algorithm inspired by motion planning but specifically designed for reinforcement learning environments, as well as a framework to use the collected data to train a reinforcement learning algorithm in previously-intractable scenarios
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Costa, Vianna Maria Luiza. « A Geometrical Approach to Estimate the Coverage Measure of the Area Explored by a Robot ». Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAX115.

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Les robots mobiles trouvent des applications dans des environnements domestiques, ainsi que dans l'agriculture, où ils permettent une agriculture de précision, et dans la logistique, garantissant le transport efficace de matériaux et de marchandises. De plus, ils jouent un rôle crucial dans l'exécution d'une large gamme de tâches difficiles ou dangereuses pour les humains, étant essentiels dans les missions de couverture de zone.L'objectif principal d'une mission de couverture de zone est de traverser et d'explorer systématiquement une zone définie, en ne laissant aucune région inexplorée. Ces missions sont souvent entreprises dans des environnements présentant des risques significatifs pour les opérateurs humains, tels que des champs minés ou des zones sinistrées. Dans ce contexte, les missions de déminage et les opérations de recherche et de sauvetage sont des exemples de missions de couverture de zone avec un caractère critique pour la sécurité.Une connaissance précise de la zone explorée par un robot mobile est cruciale pour évaluer l'achèvement de ces missions. Certaines applications peuvent également nécessiter que le robot revisite une zone d'intérêt. Dans ce cas, pour vérifier si la mission est complète, il est nécessaire de déterminer combien de fois chaque partie de l'espace a été dans la zone de détection du robot.Dans ce contexte, nous introduisons le concept de mesure de couverture, qui représente combien de fois une partie de l'environnement a été explorée par un robot mobile au cours d'une mission. En plus d'évaluer les missions où il faut revisiter des points d'intérêt, la mesure de couverture est également utile pour l'optimisation des trajets et pour améliorer l'efficacité des algorithmes de localisation dans des environnements homogènes, tels que l'environnement sous-marin.De plus, nous établissons une relation entre la mesure de couverture et le degré topologique. Cette relation nous permet de proposer une nouvelle approche pour estimer la zone explorée en se basant sur les propriétés topologiques de l'environnement qui a été observé. L'incertitude associée à la mission est prise en compte grâce à l'utilisation de l'analyse par intervalles dans la formalisation du problème.La théorie et les algorithmes développés dans cette thèse sont illustrés par des expériences en conditions réelles dans l'environnement marin
Mobile robots are increasingly being deployed across different domains. These robots find applications in domestic settings, as well as in agriculture, where they enable precision farming, and logistics, ensuring the efficient transportation of materials and goods. Moreover, they play crucial roles carrying out a wide range of challenging tasks that would be too dangerous or difficult for humans, being pivotal in area-covering missions.Area-covering missions refer to tasks where the primary objective is to systematically traverse and explore a defined area, leaving no region unexamined. Additionally, they are often undertaken in environments that pose significant risks to human operators, such as minefields or disaster-stricken areas. In this context, examples of safety-critical area-covering missions are Mine Countermeasure (MCM) missions and Search and Rescue (SAR) operations.Accurate knowledge of the area explored by a mobile robot is crucial for assessing the completeness of these missions. Some applications might also require the robot to revisit an area of interest, in this case, to verify the completion a mission, one has to be capable of determining how many times each part of the space has been in the robot's range of detection.In this context, we introduce the concept of coverage measure, that represents how many times a part of the environment was explored by a mobile robot during a mission. In adition to evaluating revisiting missions, the coverage measure is also useful for path optimization and it can be valuable for improving the efficiency of localization algorithms in homogeneous environments, such as the underwater environment.Furthermore, we establish a relation between the coverage measure and the topological degree. This relation allows us to propose a novel approach for estimating the explored area based on topological properties of the environment that has been observed. Uncertainty associated to the mission in noisy environments is taken into consideration through the use of interval analysis in the problem formalization.The theory and the algorithms developed in this thesis are illustreated through real world experiments in the marine environment
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Bergqvist, Tomas. « To explore and verify in mathematics ». Doctoral thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-9345.

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This dissertation consists of four articles and a summary. The main focus of the studies is students' explorations in upper secondary school mathematics. In the first study the central research question was to find out if the students could learn something difficult by using the graphing calculator. The students were working with questions connected to factorisation of quadratic polynomials, and the factor theorem. The results indicate that the students got a better understanding for the factor theorem, and for the connection between graphical and algebraical representations. The second study focused on a the last part of an investigation, the verification of an idea or a conjecture. Students were given three conjectures and asked to decide if they were true or false, and also to explain why the conjectures were true or false. In this study I found that the students wanted to use rather abstract mathematics in order to verify the conjectures. Since the results from the second study disagreed with other research in similar situations, I wanted to see what Swedish teachers had to say of the students' ways to verify the conjectures. The third study is an interview study where some teachers were asked what expectations they had on students who were supposed to verify the three conjectures from the second study. The teachers were also confronted with examples from my second study, and asked to comment on how the students performed. The results indicate that teachers tend to underestimate students' mathematical reasoning. A central focus to all my three studies is explorations in mathematics. My fourth study, a revised version of a pilot study performed 1998, concerns exactly that: how students in upper secondary school explore a mathematical concept. The results indicate that the students are able to perform explorations in mathematics, and that the graphing calculator has a potential as a pedagogical aid, it can be a support for the students' mathematical reasoning.
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La, Tour Paul A. (Paul Alexis). « Combining tradespace exploration with system dynamics to explore future space architectures ». Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106593.

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Thesis: Ph. D. in Engineering Systems, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, 2016.
Some pages printed landscape orientation. Cataloged from PDF version of thesis.
Includes bibliographical references (pages 342-351).
This work proposes a merger of Tradespace Exploration with System Dynamics modeling techniques in a complementary approach. It tests the value of this mixed method for modeling the multiplicity of inputs and complexity of feedback loops that affect the cost, schedule and performance of satellite constellations within the Department of Defense. The resulting simulation enables direct comparison of the effect of changing architectural design points and policy choices with respect to satellite acquisitions and fielding. A generation-over-generation examination of policy choices is made possible through the application of soft systems modeling of experience and learning effects. The resulting model enables examination of possible futures given variations in assumptions about both internal and external forces on a satellite production pipeline. This thesis performs a policy analysis examining the current path of the Global Positioning System acquisition and compares it to equivalent position navigation and timing capability delivered through a variety of disaggregated options while varying: design lives, production quantities, non-recurring engineering and time between generations. The extensibility of this technique is investigated by adapting the model to the mission area of Weather and Climate Sensing. This thesis then performs a policy analysis examining different disaggregated approaches for the Joint Polar Satellite, focusing on the impact of complexity. Discussion of factors such as design choices, context variables, tuning variables, model execution and construction is also included.
by Paul A. La Tour.
Ph. D. in Engineering Systems
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Livres sur le sujet "Explorers and exploration"

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Ian, Cameron. Explorers and exploration. London : Bison, 1991.

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Explorers and exploration. Leicester : Magna Books, 1993.

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Educational, Grolier. Explorers and exploration. Danbury, Conn : Grolier Educational, 1998.

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Lomask, Milton. Exploration. New York : Scribner, 1988.

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Exploration. New York : Scribner, 1988.

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Vogt, Gregory. Space explorers. New York : F. Watts, 1990.

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1956-, Flannery Tim F., dir. The explorers. Melbourne, Australia : Text Pub., 1998.

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Clarke, Penny. The story of explorers and exploration. New York : Sandy Creek, 2013.

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Clarke, Penny. The story of explorers and exploration. Brighton : Book House, 2007.

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Vine, Peter. Red Sea explorers. London : Immel, 1987.

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Chapitres de livres sur le sujet "Explorers and exploration"

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Frost, Alan, et Glyndwr Williams. « The Beginnings of Britain's Exploration of the Pacific Ocean in the Eighteenth Century ». Dans Buccaneers, Explorers and Settlers, V410—V418. London : Routledge, 2023. http://dx.doi.org/10.4324/9781003418726-5.

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Williams, Glyndwr. « Explorers and Geographers : An Uneasy Alliance in the Eighteenth-Century Exploration of the Pacific ». Dans Buccaneers, Explorers and Settlers, XIII95—XIII114. London : Routledge, 2023. http://dx.doi.org/10.4324/9781003418726-13.

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Williams, Glyndwr. « "The Common Center of we Discoverers" Sir Joseph Banks, Exploration and Empire in the Late 18th Century ». Dans Buccaneers, Explorers and Settlers, XVII177—XVII191. London : Routledge, 2023. http://dx.doi.org/10.4324/9781003418726-17.

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Jenks, Andrew. « Transnational Utopias, Space Exploration and the Association of Space Explorers, 1972–85 ». Dans Limiting Outer Space, 209–35. London : Palgrave Macmillan UK, 2018. http://dx.doi.org/10.1057/978-1-137-36916-1_9.

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Keiser, Debbie, Brenda McGee, Mary Hennenfent, Chuck Nusinov et Linda Triska. « The Greatest Explorers ». Dans Explorations, 43–44. New York : Routledge, 2021. http://dx.doi.org/10.4324/9781003235057-13.

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Hokkanen, Markku. « From Heroic Exploration to Careful Control : Mobility, Health, and Medicine in the British African Empire ». Dans Medicine and Mobility in Nineteenth-Century British Literature, History, and Culture, 259–79. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-17020-1_12.

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AbstractNineteenth-century explorers epitomised, in their public image, heroic, energetic, and enduring Victorian masculinity. The demands of mobility in challenging conditions and facing high risks to health were central to this image. This was particularly the case in tropical Africa. Among many mid- to late Victorians there was a common idea that keeping active and on the move in tropical conditions was healthy and that conversely immobility or slowness could be perilous. However, as the exploration of the African interior gave way to conquest and colonisation, ideas advocated for controlled, disciplined, and careful mobility gained ground. Although the image of the enduring, risk-taking mobile explorer persisted, it gradually gave way to depictions of more careful, controlled colonisers. Markku Hokkanen’s chapter analyses the changing relations between mobility, health and medicine in the contexts of British exploration and early settlement in tropical Africa in images, theories, and practices. Authors studied include David Livingstone, Horace Waller, and John Buchanan on South-Central Africa, and Mary Kingsley on West Africa.
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Cary, M., et E. H. Warmington. « Results of Ancient Explorations ». Dans The Ancient Explorers, 184–93. London : Routledge, 2024. http://dx.doi.org/10.4324/9781003478201-9.

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Keiser, Debbie, Brenda McGee, Mary Hennenfent, Chuck Nusinov et Linda Triska. « Explore Your Nutritional Habits ». Dans Explorations, 31–33. New York : Routledge, 2021. http://dx.doi.org/10.4324/9781003235057-8.

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Brandt, J. C., R. W. Farquhar, S. P. Maran, M. B. Niedner et T. T. von Rosenvinge. « The International Cometary Explorer ». Dans Exploration of Halley’s Comet, 969–80. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-82971-0_168.

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Everitt, Dave. « The Artist as Digital Explorer ». Dans Explorations in Art and Technology, 173–78. London : Springer London, 2002. http://dx.doi.org/10.1007/978-1-4471-0197-0_18.

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Actes de conférences sur le sujet "Explorers and exploration"

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Pankine, Alexey A. « Mars Exploration with Directed Aerial Robot Explorers ». Dans SPACE TECHNOLOGY AND APPLICATIONS INTERNAT.FORUM-STAIF 2004 : Conf.on Thermophys.in Microgravity ; Commercial/Civil Next Gen.Space Transp. ; 21st Symp.Space Nuclear Power & Propulsion ; Human Space Explor. ; Space Colonization ; New Frontiers & Future Concepts. AIP, 2004. http://dx.doi.org/10.1063/1.1649668.

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Allard, Terry. « The New Explorers : ESMD Crew-Systems Integration Research and Vision ». Dans 1st Space Exploration Conference : Continuing the Voyage of Discovery. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-2503.

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Alexander, Elinor. « Natural hydrogen exploration in South Australia ». Dans PESA Symposium Qld 2022. PESA, 2022. http://dx.doi.org/10.36404/putz2691.

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South Australia has taken the lead nationally in enabling exploration licences for natural hydrogen. On 11 February 2021 the Petroleum and Geothermal Energy Regulations 2013 were amended to declare hydrogen, hydrogen compounds and by-products from hydrogen production regulated substances under the Petroleum and Geothermal Energy Act 2000 (PGE Act). Companies are now able to apply to explore for natural hydrogen via a Petroleum Exploration Licence (PEL) and the transmission of hydrogen or compounds of hydrogen are now permissible under the transmission pipeline licencing provisions of the PGE Act. The maximum area of a PEL is 10,000 square kilometres so they provide a large acreage position for explorers. PEL applicants need to provide evidence of their technical and financial capacity as well as a 5-year work program which could include field sampling, geophysical surveys (e.g., aeromagnetics, gravity, seismic and MT) and exploration drilling to evaluate the prospectivity of the licence for natural hydrogen. Since February 2021, seven companies have lodged 35 applications for petroleum exploration licences (PELs), targeting natural hydrogen. The first of these licences (PEL 687) over Kangaroo Island and southern Yorke Peninsula was granted to Gold Hydrogen Pty Ltd on 22 July 2021. As well as issuing exploration licences, a key role of the South Australian Department for Energy and Mining is to provide easy access to comprehensive geoscientific data submitted by mineral and petroleum explorers and departmental geoscientists since the State was founded in 1836. Access to old 1920s and 1930s reports, together with modern geophysical and well data has underpinned the current interest in hydrogen exploration. Why the interest? 50-80% hydrogen content was measured in 1931 by the Mines Department in gas samples from wells on Kangaroo Island, Yorke Peninsula and the Otway Basin, potential evidence that the natural formation of hydrogen has occurred. Iron-rich cratons and uranium-rich basement (also a target for geothermal energy explorers) occur in the Archaean-Mesoproterozoic Gawler Craton, Curnamona and Musgrave provinces which are in places fractured and seismically active with deep-seated faults. Sedimentary cover ranges from Neoproterozoic-Recent in age, with thick clastic, carbonate and coal measure successions in hydrocarbon prospective basins and, in places, occurrences of mafic intrusives and extrusives, iron stones, salt and anhydrite which could also be potential sources of natural hydrogen.
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MacLeish, Marlene Y., William A. Thomson, Nancy P. Moreno, Gregory L. Vogt, Gary R. Coulter, Roland B. Smith, Clifford W. Houston et Marguerite A. Sognier. « Educating the next generation of space explorers : cultivating public participation for space exploration ». Dans 57th International Astronautical Congress. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.iac-06-e1.3.09.

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Cobby, G. L. « Reaching Agreement Between Oil Explorers And Rock Lobster Fishermen Offshore Dongara, Western Australia ». Dans SPE International Conference on Health, Safety, and Environment in Oil and Gas Exploration and Production. Society of Petroleum Engineers, 2004. http://dx.doi.org/10.2118/86638-ms.

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Camac, BA, C. Krapf et A. Fabris. « Combining the strength of Petroleum and Mineral System knowledge to advance exploration within the Critical Mineral space ». Dans Central Australian Basins Symposium IV. Petroleum Exploration Society of Australia (PESA), 2022. http://dx.doi.org/10.36404/ugxt4719.

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Both the petroleum and mineral industries have relied on proven methods when exploring for economic deposits. All methods have their origins in a deep understanding in geological principles, so it’s no surprise that there are many analogous processes employed across both industries. A significant difference is “where” in the earth’s crust the commodity of interest is accumulated and extracted. Economic recovery of any resource drives “how” explorers go about finding the commodity of interest and what tools they employ in their search.
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van Mastrigt, Pieter, et Michael J. Quinn. « Reducing Uncertainties to Shape the Future of Exploration ». Dans International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21339-ms.

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Abstract For any given Exploration oil and gas portfolio and associated opportunities, successful business decisions can only be made on the basis of technically robust estimates of the subsurface risk versus the resource potential and estimate of the associated upside(s). Ideally, these estimates should incorporate the entire spectrum of opportunities for the complete portfolio and they should be made in a consistent and comparable way. However, as Explorers, we are often faced with data that is incomplete, limited, of variable quality, and/or inconsistent. As a result, subsurface evaluation may be seen more as educated guessing rather than a robust science of evaluation grounded in facts and defensible logic. In their January 2020 paper "Randomness, serendipity, and luck in petroleum exploration" authors Milkov and Navidi (Ref 1.) go quite a bit further and demonstrate that luck is a significant factor in the exploration success equation. They also showed a general lack in long-term consistency in exploration results of individual companies. Indeed, after we looked at PETRONAS’ own historical POSg versus actual technical success rates and observed only a fair to poor relation between actual technical success rate and the pre-drill POSg estimate. A similar—albeit less worrisome—observation was made for volume ranges and fluid phase predictions. Clearly, there is, and always has been, a phenomenal challenge for the Petroleum Geoscientists to provide the sought after estimates as accurately as possible, and we were no exception. In a bid to improve on this PETRONAS set out on a more disciplined approach to characterizing subsurface uncertainties on its conventional exploration efforts. Over time, more accurate characterizations of such exploration risk and resource potential have followed from a series of procedural guidelines, enhanced capability training program and careful governance of exploration workflows. With improved capabilities and workflow consistency, our evaluation teams have delivered substantially better subsurface evaluations. This in turn has led to more confident decision-making on e.g., individual drilling decisions and new play entries. While our newly implemented workflows are not groundbreaking in isolation, in combination they have delivered notable success and an improved ability to shape the future growth for PETRONAS. In this article, we will highlight the main contributing changes and demonstrate that the overall improvements are indeed impactful. We are not directly challenging the article of Milkov et. al., but are convinced that professionalism and scientific discipline is the deciding factor in the Exploration success equation.
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Surovtsev, Dmitry, Parth Joshi et Muhammad Usman Sethi. « The Dusk of MEFS in the Digital Era of Exploration Value Creation ». Dans International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21458-ms.

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Abstract The concept of minimum economic field size (MEFS) has been used by explorationists for almost four decades. MEFS is often the only filter to distinguish between a commercial and a non-commercial discovery—far before a wildcat well is drilled—to test a prospect for a working petroleum systems hypothesis. As simple as it gets, the concept started to lose traction in the 21st century as subsurface targets became more and more challenging. In the case of tight hydrocarbons, it is fairly common to observe a P90 case net present value (NPV) to be negative, a P50 case to be positive, and a P10 case to be negative again. The reason for this outcome is that a whole set of full-cycle factors, in addition to the field size, affects prospect commerciality. Their uncertainty ranges can match or exceed resource estimate uncertainty. These factors include, but are not limited to, initial productivity of development wells, estimated eltimate recovery (EUR) per well, decline curve parameters, capital investments, operating costs, and the project phases’ durations. A new way of handling the full universe of risks and uncertainties faced by modern explorers is already available in the new generation of industry-leading integrated prospect risk, resource and value assessment software. Innovators and thought leaders can already substitute MEFS with a commerciality threshold (CT) that neatly mimics board considerations at the final investment decision (FID) stage gate. Others can consider the economic chance of success (ECOS) estimated with a probabilistic full-cycle mindset, as an additional metric valuable for risk management purposes. Using fictional case studies inspired by real-life assessment situations, we discuss the additional value creation by a CT-powered workflow as compared to an MEFS-based one and explain the reasons for the key differences. The discussed workflow does not eliminate nature-specific uncertainties; neither does it reduce the geological risk. However, it helps to better understand human-controlled risks and prepare management exploration decisions with a greater degree of confidence.
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Witte, Jan, Daniel Trümpy et Hans Georg Babies. « The Role of Neo-Tectonics in Oil Migration, Lake Turkana Region, Kenya ». Dans SPE/AAPG Africa Energy and Technology Conference. SPE, 2016. http://dx.doi.org/10.2118/afrc-2574239-ms.

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ABSTRACT Numerous oil seeps have been documented in the Turkana Basin, western Kenya. However, no commercial oil has been found here to date. Recently discovered substantial oil fields in the nearby Lokichar Basin indicate that oil migration can be complex in these rift basins and may pose an exploration risk. We present a new fault and lineament map of the Turkana-Lokichar Basins, integrated with present-day stress data, oil seeps and known prospects. Digital terrain data, satellite images, geological maps, seep and gravity data were integrated into a GIS-database, to superimpose the data and to test it for spatial correlations. Digital terrain data, satellite images, gravity and structural maps were used to conduct detailed mapping of the fault and lineament network. The seep and prospect maps are based on the integration of different public data sources. Four main fault sets are recognized in the basin (~N-S, W-E, NW-SE and SW-NE). Careful analysis of topographic data along both shores of Lake Turkana reveals numerous fault scarps, indicative of recent tectonic activity (particularly the N-S and NW-SE set). The area is presently under NW-SE oriented extension, implying that most of the rift-parallel N-S faults are under oblique dextral transtension. The majority of the documented oil seeps and slicks are found to be associated with rift-parallel faults but also occasionally with the W-E trending set. Recently published neo-tectonic and isostatic uplift data indicate that the highest level of recent fault activity is presently found close to the rift axis and dominantly on the rift-parallel fault sets. We conclude that ~N-S and W-E oriented faults are the most conductive pathways for hydrocarbons in this region under the present-day stress field (and likely throughout the Mio-Pliocene). We further observe that several prospects of the NW-SE trend have seepages associated with them, which could be indicative of breached traps, especially close to the rift axis where faults are most active. Our assessment should help to better understand migration pathways and exploration risks in the Turkana Basin. We encourage explorers to carefully map fault networks, investigate active fault scarps, age-date them where possible, test them for spatial correlation with oil seeps and evaluate them within the context of the present-day stress field. In consequence these workflows will help mitigate exploration risks in the Turkana-Lokichar Basins and similar tectonic settings.
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Wattamwar, Sujal S., Surjeet Mishra et Hiranmay Ghosh. « Multimedia explorer : Content based multimedia exploration ». Dans TENCON 2008 - 2008 IEEE Region 10 Conference (TENCON). IEEE, 2008. http://dx.doi.org/10.1109/tencon.2008.4766639.

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Rapports d'organisations sur le sujet "Explorers and exploration"

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Armston-Sheret, Edward. Guide or explorer ? Who counts in the history of exploration ? Royal Geographical Society (with IBG), avril 2023. http://dx.doi.org/10.55203/vddd6223.

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Flanders, Joanne, et Eric Niiler. New Frontiers in Ocean Exploration : The E/V Nautilus, NOAA Ship Okeanos Explorer, and R/V Falkor 2020 Field Season. Sous la direction de Nicole Raineault. The Oceanography Society, mars 2021. http://dx.doi.org/10.5670/oceanog.2021.supplement.01.

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Christie, Benjamin, Osama Ennasr et Garry Glaspell. Autonomous navigation and mapping in a simulated environment. Engineer Research and Development Center (U.S.), septembre 2021. http://dx.doi.org/10.21079/11681/42006.

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Unknown Environment Exploration (UEE) with an Unmanned Ground Vehicle (UGV) is extremely challenging. This report investigates a frontier exploration approach, in simulation, that leverages Simultaneous Localization And Mapping (SLAM) to efficiently explore unknown areas by finding navigable routes. The solution utilizes a diverse sensor payload that includes wheel encoders, three-dimensional (3-D) LIDAR, and Red, Green, Blue and Depth (RGBD) cameras. The main goal of this effort is to leverage frontier-based exploration with a UGV to produce a 3-D map (up to 10 cm resolution). The solution provided leverages the Robot Operating System (ROS).
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Ennasr, Osama, Brandon Dodd, Michael Paquette, Charles Ellison et Garry Glaspell. Low size, weight, power, and cost (SWaP-C) payload for autonomous navigation and mapping on an unmanned ground vehicle. Engineer Research and Development Center (U.S.), septembre 2023. http://dx.doi.org/10.21079/11681/47683.

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Autonomous navigation and unknown environment exploration with an unmanned ground vehicle (UGV) is extremely challenging. This report investigates a mapping and exploration solution utilizing low size, weight, power, and cost payloads. The platform presented here leverages simultaneous localization and mapping to efficiently explore unknown areas by finding navigable routes. The solution utilizes a diverse sensor payload that includes wheel encoders, 3D lidar, and red-green-blue and depth cameras. The main goal of this effort is to leverage path planning and navigation for mapping and exploration with a UGV to produce an accurate 3D map. The solution provided also leverages the Robot Operating System.
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Wagner, Daniel. The Ocean Exploration Trust 2023 Field Season. Ocean Exploration Trust, avril 2024. http://dx.doi.org/10.62878/vud148.

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This annual report marks the fifteenth year anniversary of Ocean Exploration Trust’s (OET) E/V Nautilus exploring poorly known parts of our global ocean in search of new discoveries. Since its first season in 2009, E/V Nautilus has conducted a total of 158 expeditions that explored our ocean throughout the Black Sea, Mediterranean, Atlantic, Caribbean, and Pacific for a total of 1,970 days at sea (~5.5 years). These scientific expeditions included a total of 1,017 successful ROV dives, as well as mapped over 1,053,000 km2 of seafloor. The results of these exploratory expeditions have been summarized in over 300 peer-reviewed scientific publications covering a wide range of scientific disciplines, including marine geology, biology, archaeology, chemistry, technology development, and the social sciences. Throughout its 15-year history, E/V Nautilus has been not only a platform for ocean exploration and discovery, but also an inclusive workspace that has provided pathways for more people, especially those early in their careers, to experience and enter ocean exploration professions. It has also catalyzed numerous technological innovations, multi-disciplinary collaborations, and inspired millions through OET’s extensive outreach initiatives. The 2023 field season was no exception, with E/V Nautilus undertaking 12 multi-disciplinary expeditions that explored some of the most remote and poorly surveyed areas in the Pacific, all of which included numerous activities to share expedition stories with diverse audiences across the globe.
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Baker, Alison, et Lutfiye Ali. Mapping young people’s social justice concerns : An exploration of voice and action. Centre for Resilient and Inclusive Societies, 2022. http://dx.doi.org/10.56311/hbnb8239.

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This report is the first phase of a two-phase action research project titled Building Activist Capacities of Young People Through Issue-based Campaigns. The report explores key social issues facing young people aged 16 to 25 in Victoria, Australia, and examines how they respond to these issues. This study aims to better understand young people’s experiences of voice, the contexts and conditions in which they can cultivate their voices for social change, and where their voices resonate.
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Hogan, Karen, Janez Kren et Conor O'Toole. Irish enterprise digitalisation : A cross-country exploration. ESRI, avril 2024. http://dx.doi.org/10.26504/rn20240201.

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This research provides a cross-country perspective on the rate of digitalisation of Irish enterprises. We explore differences across countries, sectors and firm size categories by deploying data on both the usage of digitalisation technologies (stock of digital activities) as well as investment in new digital activities (flow). We draw on two main datasets: a) the Eurostat ICT usage in enterprises survey; and b) the European Investment Bank Investment Survey. We find that Ireland performs relatively well in terms of e-commerce and some more advanced technologies. However particular sectors and firm size groups (such as construction and smaller firms) display low levels of digitalisation. This supports the continued deployment of a sector-specific targeted policy approach that can cater for heterogeneous challenges faced by different firms. We find some evidence of correlations between enabling factors like employment skill levels and the cost of finance and the level of investment in digitalisation.
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Seiler, Danielle, et Julie R. Weeks. Women's Entrepreneurship in Latin America : An Exploration of Current Knowledge. Inter-American Development Bank, septembre 2001. http://dx.doi.org/10.18235/0008870.

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This report intends to introduce the discussion of gender gaps in entrepreneurship development and to explore possible actions that could effectively foster women's entrepreneurship. With this purpose in mind, the authors searched for results of recent fieldwork on women entrepreneurs in Latin America and the Caribbean, and found very useful quantitative studies for a limited number of countries that allow us to start the analysis of the existing gender gaps among entrepreneurs. This study focuses on formal women-owned small businesses.
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Durik, Amanda, Steven McGee, Linda Huber et Jennifer Duck. The Cat is Alive and Well : Curiosity Motivates Exploration for High Interest Learners. The Learning Partnership, avril 2015. http://dx.doi.org/10.51420/conf.2015.1.

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Two studies were conducted to examine how individual interest predicts interactions with domain content and subsequent free-choice exploration. Particular focus was on learners’ acquisition of knowledge and identification of content that triggered curiosity. College student participants reported their individual interest, learned about a topic in ecology (Study 1, N = 85) and astronomy (Study 2, N = 184), responded to prompts for memory of the learning content and curiosity questions, and then had the opportunity to explore additional content related to the topic. In both studies individual interest interacted with whether students’ curiosity was triggered by particular content. In academic domains, individual interest in conjunction with curiosity may be the best predictor of continued behavioral exploration. The results are discussed in the context of the four-phase model of interest development.
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Chong, Alberto E., et Luisa Zanforlin. Inward-Looking Policies, Institutions, Autocrats, and Economic Growth in Latin America : An Empirical Exploration. Inter-American Development Bank, avril 2001. http://dx.doi.org/10.18235/0011570.

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This paper explores the institutional determinants of economic growth in Latin America by taking advantage of recent empirical research that employs subjective and objective measures to test for a possible "Northian" explanation that links institutional quality and economic growth. I provide a framework that helps better understand the policymakers' choices and persistence regarding inward-looking policies that were pursued between the 1930s and the 1980s by arguing that in the Latin American case Olson's (1982) idea of encompassing interest should be expanded to cover not only the economic stakes of power holders, but also, their political stakes, somewhat along the lines of work by Robinson (1997).
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