3,622 research outputs found
Jerarquía maya entre los dioses lacandones.. Anales del Instituto Nacional de Antropología e Historia. Num. 47 Tomo XVIII (1965) Sexta Época (1939-1966)
No full textAnónimo a) El Libro de los Libros de Chilam Balam, Trad. por Alfredo Barrera Vásquez y Silvia Rendón. México, 1948.Anónimo b) Popol Vuh, The Sacred Book of the Ancient Quiché Maya, English version by Delia Goetz and Sylvanus G. Morley from the translation of Adrián Recinos. University of Oklahoma Press. Norman, 1950.Bruce S., R. D. a) The Book of Chan Kin. (Inédito).Bruce S., R. D. b) Gramática del Lacandón, Tesis profesional, Escuela Nacional de Antropología e Historia. México, 1965. (lnédito).Landa, Fr. D. de. Relación de las Cosas de Yucatán. México, 1959.Marimon y Tudo, S. Fray Antonio Margil über die Lacandonen, 1695. Zeitschrift für Ethnologie, XIV, pp. 130-32. Stuttgart, 1882.Morley, S. G. La Civilización Maya, versión española de Adrián Recinos. México, 1947.Villa Rojas, A. Los Lacandones. (Inédito)
Lidar Remote Sensing of Forests: New Instruments and Modeling Capabilities
No full textLidar instruments provide scientists with the unique opportunity to characterize the 3D structure of forest ecosystems. This information allows us to estimate properties such as wood volume, biomass density, stocking density, canopy cover, and leaf area. Structural information also can be used as drivers for photosynthesis and ecosystem demography models to predict forest growth and carbon sequestration. All lidars use time-in-flight measurements to compute accurate ranging measurements; however, there is a wide range of instruments and data types that are currently available, and instrument technology continues to advance at a rapid pace. This seminar will present new technologies that are in use and under development at NASA for airborne and space-based missions. Opportunities for instrument and data fusion will also be discussed, as Dr. Cook is the PI for G-LiHT, Goddard's LiDAR, Hyperspectral, and Thermal airborne imager. Lastly, this talk will introduce radiative transfer models that can simulate interactions between laser light and forest canopies. Developing modeling capabilities is important for providing continuity between observations made with different lidars, and to assist the design of new instruments. Dr. Bruce Cook is a research scientist in NASA's Biospheric Sciences Laboratory at Goddard Space Flight Center, and has more than 25 years of experience conducting research on ecosystem processes, soil biogeochemistry, and exchange of carbon, water vapor and energy between the terrestrial biosphere and atmosphere. His research interests include the combined use of lidar, hyperspectral, and thermal data for characterizing ecosystem form and function. He is Deputy Project Scientist for the Landsat Data Continuity Mission (LDCM); Project Manager for NASA s Carbon Monitoring System (CMS) pilot project for local-scale forest biomass; and PI of Goddard's LiDAR, Hyperspectral, and Thermal (G-LiHT) airborne imager
FIGURE 1 in Cirolana bambang, a distinctive new species of Cirolana Leach, 1818 (Crustacea: Isopoda: Cirolanidae) from Bitung, Indonesia
No full textFIGURE 1. Cirolana bambang sp. nov., holotype ♂ (7.4 mm, MZB Cru.Iso 073) (A–C, E–G), paratype ♂ (6.5 mm, MZB Cru.Iso 074) (D, H, I, J): A, dorsal view; B, lateral view; C, frons; D, antenna pedunCle; E, head; F, pleon; G, penial proCess; H, uropod; I, pleotelson; J, antennula.Published as part of Sidabalok, Conni M. & Bruce, Niel L., 2018, Cirolana bambang, a distinctive new species of Cirolana Leach, 1818 (Crustacea: Isopoda: Cirolanidae) from Bitung, Indonesia, pp. 441-450 in Zootaxa 4375 (3) on page 443, DOI: 10.11646/zootaxa.4375.3.10, http://zenodo.org/record/115892
Alexander Dalrymple (1737-1808), hydrographer to the East India Company and the Admiralty, as publisher: a catalogue of books and charts
No full textThis is a study of the publications and publishing practices of
Alexander Dalrymple (1737-1808). Dalrymple was cumulatively a private
publisher of nautical charts and plans (from 1767), the ''examiner of
ships' journals'' and chart publisher for the East India Company (from
1779), and Hydrographer to the Admiralty (from 1795).
The core of the study is a catalogue of the known publications of
Alexander Dalrymple, defining and establishing his oeuvre. The
catalogue is in two parts, Catalogue A for the letterpress publications,
numbering 257, and Catalogue B for the engraved charts, plans of ports,
views of land, and other Illustrations, numbering 1116. The entries in
each part of the catalogue are arranged chronologically by date of
publication, with full bibliographical and technical descriptions, and
notes of attribution, dating and inter-relationships.
The introduction gives a short account of Dalrymple's life, focussing on
his publishing activity, and introducing his geographical and political
pamphlet publishing. Four phases of activity in his nautical publication
are identified: the decision to publish charts and memoirs from his own
voyages in the Eastern Archipelago (1769-1772); the private publication
of charts and plans with grants or subscriptions from the East India
Company (1772-1779); the annual series of charts, plans, views and
memoirs issued from 1779 onwards for the East India Company; and the
organisation and output of the Admiralty Hydrographic Office which he
ran in parallel with his East India Company work after 1795. This is
supplemented by a discussion of the continuing use made of Dalrymple's
charts after his death in 1808.
An investigation of Dalrymple's engraving and publishing practices
follows, with a brief survey of his technical leaflets and manuals on
nautical surveying and chronometer use, and an account of Oriental
Repertory, his chief non-nautical publication. The study emphasises the
close personal control Dalrymple exercised over his publications, and
the consequent problems in the Admiralty and East India Company in
developing arrangements to continue publishing charts after his death
Opening Up an Intelligent Tutoring System Development Environment for Extensible Student Modeling
No full textITS authoring tools make creating intelligent tutoring systems more cost effective, but few authoring tools make it easy to flexibly incorporate an open-ended range of student modeling methods and learning analytics tools. To support a cumulative science of student modeling and enhance the impact of real-world tutoring systems, it is critical to extend ITS authoring tools so they easily accommodate novel student modeling methods. We report on extensions to the CTAT/Tutorshop architecture to support a plug-in approach to extensible student modeling, which gives an author full control over the content of the student model. The extensions enhance the range of adaptive tutoring behaviors that can be authored and support building external, student- or teacher-facing real-time analytics tools. The contributions of this work are: (1) an open architecture to support the plugging in, sharing, re-mixing, and use of advanced student modeling techniques, ITSs, and dashboards; and (2) case studies illustrating diverse ways authors have used the architecture
Captain Cook and the Pacific Islands
No full textill. ; 28 cmIncludes bibliographical referencesPacific Islands Studies Conference (3rd : 1978 : University of Hawaii)Editors' Introduction / Jane N. Hurd and Michiko Kodama -- Opening Remarks / Carl J. Daeufer -- Hawaii Foundation for History and the Humanities / William J. Bonk -- The Role of the Bishop Museum in the Pacific / Edward C. Creutz -- Introductory Remarks / Jane N. Hurd -- The Yorkshire Haunts of Captain Cook / John Charles -- Some Historical Materials that Relate to the Pre-Captain Cook Pacific in Continental European Institutions / Richard Mayer -- Some British Sources of Information on Voyages to Hawaii, 1786-1820 / Bruce Palmer -- The Scientific Significance of Cook's Third Voyage / Charles H. Lamoureux -- The Consequences of Cook's Hawaiian Contacts on the Local Population / Peter N. D. Pirie -- Agricultural Pattern and Nutritional Status of People in the South Pacific Countries / Yeuh-Heng Yang -- Captain Cook and Pacific Islanders: "All Imaginable Humanity"? / Timothy J. Macnaught -- Mental Health in the Pacific / Kenneth O. Sanborn -- Interests and Dependencies: The Pacific After Cook / Craig Severence -- Summation and Closing Remarks / James McCutcheon
Airborne Lidar-Based Estimates of Tropical Forest Structure in Complex Terrain: Opportunities and Trade-Offs for REDD+
No full textBackground: Carbon stocks and fluxes in tropical forests remain large sources of uncertainty in the global carbon budget. Airborne lidar remote sensing is a powerful tool for estimating aboveground biomass, provided that lidar measurements penetrate dense forest vegetation to generate accurate estimates of surface topography and canopy heights. Tropical forest areas with complex topography present a challenge for lidar remote sensing. Results: We compared digital terrain models (DTM) derived from airborne lidar data from a mountainous region of the Atlantic Forest in Brazil to 35 ground control points measured with survey grade GNSS receivers. The terrain model generated from full-density (approx. 20 returns/sq m) data was highly accurate (mean signed error of 0.19 +/-0.97 m), while those derived from reduced-density datasets (8/sq m, 4/sq m, 2/sq m and 1/sq m) were increasingly less accurate. Canopy heights calculated from reduced-density lidar data declined as data density decreased due to the inability to accurately model the terrain surface. For lidar return densities below 4/sq m, the bias in height estimates translated into errors of 80-125 Mg/ha in predicted aboveground biomass. Conclusions: Given the growing emphasis on the use of airborne lidar for forest management, carbon monitoring, and conservation efforts, the results of this study highlight the importance of careful survey planning and consistent sampling for accurate quantification of aboveground biomass stocks and dynamics. Approaches that rely primarily on canopy height to estimate aboveground biomass are sensitive to DTM errors from variability in lidar sampling density
Technological capabilities and Japanese foreign direct investment in the United States
No full textExamines the effect of relative technological capabilities on Japanese direct investment into the US by looking simultaneously at industry conditions in the two markets. A negative binomial regression model is specified to estimate the effects of R&D capability and industry structure on a count measure of Japanese entries across 297 industries. The results indicate that Japanese direct investment in the US is drawn to industries intensive in R&D expenditures summed across both countries; voluntary restraints on Japanese exports encourage direct investment. When the entries are disaggregated by mode there is a significant indication that joint ventures are used for the sourcing and sharing of US technological capabilities. -from Author
Experimentally induced chronic copper toxicity in cattle
No full textEight Bonsmara bulls and eight Bonsmara heifers, having masses of between 210 and 266 kg when selected, were randomly allocated to four groups, each comprising two bulls and two heifers. Group 1 received 0,6 mg of copper (Cu)/kg of body mass per day (bm/d), group 2, 10 mg of Cu/kg of bm/d and group 3, 20 mg of Cu/kg of bm/d as a copper sulphate solution, given orally, 5 d a week over 745 d. Group 4 was the control group. One bull from group 3 was euthanased on day 679 of the trial, a heifer from group 3 and a bull from group 2, on day 695 of the trial, and a heifer from group 2, on day 731 of the trial, after they had shown clinical signs.
During the course of the trial, clinical signs, serum gamma glutamyltransferase and aspartate aminotransferase activity, blood urea nitrogen, and plasma copper, zinc and iron concentrations were monitored. Live mass was recorded weekly to determine any effect on mass gain. The liver and kidney copper, zinc, iron and manganese concentrations at the time of death or slaughter are given.
From the results it was concluded that subclinical damage to the liver and eventual copper toxicity can occur when cattle are continually exposed to oral doses ≥12 mg of Cu/kg of bm/d.lt was also concluded that cattle can probably tolerate oral doses of ≤0,6 mg of Cu/kg of bm/d for an indefinite period, provided there are no other sources of copper, such as may occur with air-pollution, or provided no other adverse mineral interactions occur, such as may occur with molybdenum deficiency
The importance of the mode of transport in self-drive tourism
No full text[Extract] The diversity of self-drive tourism markets is apparent in the different experiences they seek, and the different types of people who undertake those
experiences. The first part of this book included a number of dimensions of this - differences based on the country of origin and the sort of trips that the geography, history and culture make possible, and differences based on
the destination and the sort of trip that its geography, infrastructure and amenity suggest. This geographic theme is picked up again later in the book (Carson, this volume, Chapter 25). Diversity can also come from the demographic
characteristics of travellers, and various chapters discuss diversity as a sub-theme. This second part of the book is most interested in how the type of vehicle makes a difference to the type of self-drive trip. The vehicle can often be associated with specific markets - Hardy and
Gretzel's RVers tend to be older couples (Hardy and Gretzel, this volume, Chapter 15), while Walker's motorcyclists have traditionally been young males (Walker, this volume, Chapter 12). But the demographics can change
over time, and Walker comments on the ageing of the motorcycle touring market. The vehicle can sometimes be associated with multiple markets. The four-wheel-drive and SUV vehicles at the centre of research by Taylor
and Carson (this volume, Chapter 17), and Prideaux and Coghlan (this volume, Chapter 18) cater for old and young markets as well as families. Irrespective of the demographics, the vehicles allow for, and inspire, different
types of trips. They demand different levels and types of infrastructure, they allow different lengths of trips, they suit different types of destinations, they imply different travel party sizes and so on. The aim of this chapter is to
briefly describe the importance of the type of vehicle to understanding the self-drive tourism market as an introduction to the proceeding chapters, which then link specific vehicle types to emerging markets and global trends
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