Dataset Information

Data set for French historical light aids to navigation (F-LAN) covering the period 1775-1929.

ABSTRACT: F-LAN is a geospatial data set that documents hundreds of coastal lights that guided ships around France from medieval times to 1929. F-LAN provides visibility range for individual lights. The authors collected all data from scholarly literature, historical coastal navigational charts, and official lighthouse surveys. F-LAN allows users to track the provision of coastal lighting over time. It complements the existing LAN dataset for England and Wales. Thanks to F-LAN it is now possible to map and analyse light coverage for France over two centuries. It can be used to analyse coastal routing, infrastructure investment and the relationship between accidents and the provision of light in any given area.

SUBMITTER: Litvine AD

PROVIDER: S-EPMC8076693 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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Data set for French historical light aids to navigation (F-LAN) covering the period 1775-1929.

Litvine Alexis D AD Dunn Oliver O

Data in brief 20210324

F-LAN is a geospatial data set that documents hundreds of coastal lights that guided ships around France from medieval times to 1929. F-LAN provides visibility range for individual lights. The authors collected all data from scholarly literature, historical coastal navigational charts, and official lighthouse surveys. F-LAN allows users to track the provision of coastal lighting over time. It complements the existing LAN dataset for England and Wales. Thanks to F-LAN it is now possible to map an ...[more]

PMID: 33937448

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Project description:ObjectiveThe objective of this study was to develop a French value set for the EQ-5D-5L, for academic and clinical research, and for regulatory requirements for price-setting of drugs and medical devices.MethodThis study used the standardized valuation protocol developed by EuroQol, using computer-assisted personal interview software. A representative sample of 1048 French residents were interviewed by a market research company, under the supervision of the research team. Health states were valued using composite time trade-off and a discrete choice experiment. Modeling was used to create values for the 3125 possible health states. The composite time trade-off data were modeled using a Tobit model with censored observations at -1 and correcting for heteroscedasticity. A conditional logit model was used for the discrete choice results, and both models were combined using a hybrid model. An adjusted hybrid model was tested to correct for imbalance in the sample on age and sex compared with the general population. A comparison with the 3-level (3L) value set was performed.ResultsThe adjusted model was preferred to comply with the representativeness of the general population. It provided a value set for which all coefficients were logically consistent. Values ranged from - 0.525 to 1. The distribution of values presented a shift towards higher values versus the 3L value set. Ranking of dimensions changed. Pain and discomfort and mobility were the dimensions with the highest potential for disutility compared with mobility and self-care for the 3L instrument.ConclusionsThis study provides a value set based on societal preferences of the French population, using an improved descriptive instrument of health-related quality-of-life health states. It will contribute to improve the quality of cost-effectiveness analysis in the French context and help stimulate disease-specific quality-of-life references for academic-, institutional-, and industry-promoted studies.

Project description:The historical relevance of the Thera (Santorini) volcanic eruption is unclear because of major dating uncertainty. Long placed ~1500 BCE and during the Egyptian New Kingdom (starts ~1565-1540 BCE) by archaeologists, 14C pointed to dates ≥50-100 years earlier during the preceding Second Intermediate Period. Several decades of debate have followed with no clear resolution of the problem-despite wide recognition that this uncertainty undermines an ability to synchronize the civilizations of the eastern Mediterranean in the mid-second millennium BCE and write wider history. Recent work permits substantial progress. Volcanic CO2 was often blamed for the discrepancy. However, comparison of 14C dates directly associated with the eruption from contemporary Aegean contexts-both on and remote from Thera-can now remove this caveat. In turn, using Bayesian analysis, a revised and substantially refined date range for the Thera eruption can be determined, both through the integration of the large 14C dataset relevant to the Thera eruption with the local stratigraphic sequence on Thera immediately prior to the eruption, and in conjunction with the wider stratigraphically-defined Aegean archaeological sequence from before to after the eruption. This enables a robust high-resolution dating for the eruption ~1606-1589 BCE (68.3% probability), ~1609-1560 BCE (95.4% probability). This dating clarifies long-disputed synchronizations between Aegean and East Mediterranean cultures, placing the eruption during the earlier and very different Second Intermediate Period with its Canaanite-Levantine dominated world-system. This gives an importantly altered cultural and historical context for the New Palace Period on Crete and the contemporary Shaft Grave era in southern Greece. In addition, the revised dating, and a current absence of southern Aegean chronological data placed soon afterwards, highlights a period of likely devastating regional eruption impact in the earlier-mid 16th century BCE southern Aegean.

Dataset Information

Data set for French historical light aids to navigation (F-LAN) covering the period 1775-1929.

Publications

Data set for French historical light aids to navigation (F-LAN) covering the period 1775-1929.

Similar Datasets

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