Sample records for ivory coast tektites

  1. Geochemistry and age of Ivory Coast tektites and microtektites

    Microsoft Academic Search

    Christian Koeberl; Richard Bottomley; Billy P. Glass; Dieter Storzer

    1997-01-01

    Ivory Coast tektites were first reported in 1934 from a geographically restricted area at Ivory Coast, West Africa. Although some additional specimens have been found later, the total number remains small (a few hundred). The Bosumtwi impact crater in Ghana is most likely the source crater for the Ivory Coast tektites, based on the finding that the tektites and the

  2. New data on selected Ivory Coast tektites

    USGS Publications Warehouse

    Cuttitta, F.; Carron, M.K.; Annell, C.S.

    1972-01-01

    Fourteen Ivory Coast tektites exhibit a range of bulk indices of refraction of 1.5156 to 1.5217 ?? 0.0004 and of bulk specific gravities of 2.428 to 2.502 ??0.005. Seven of these Ivory Coast (IVC) tektites were analyzed for major and minor element content. Compared to tektites from other strewn fields, their SiO2 content is low (67.2-69.1 %), A12O3 relatively high (15.8-16.8 %), and total iron relatively high but with a more restricted range (6.3-6.8 % as FeO). Their lime content is low (0.71-1.35%) compared to Australasian tektites but their MgO CaO ratio (about 3.1) is unusually high. All other tektite groups have Na2O K2O ratios less than unity, but the Na2O K2O ratio of the IVC tektites is slightly greater than unity. Their K Rb ratios range from 200 to 256 and average 227, which is higher than those determined for Australasian tektites, but similar to some obtained for moldavites. The Li content (41-48 ppm) is about the same as that of the Australasian tektites, but the Cs and Rb are lower, being 1.9 to 2.9 and 57 to 86 ppm, respectively. The IVC tektites are high in Cr (260-375 ppm), Co (19-25 ppm) and Ni (101-167 ppm), and particularly in Pb (<10-18 ppm), Cu (13-21 ppm) and Ga (14-23 ppm). The high Cr Ni ratios of the IVC tektites (range 2-3.6) are similar to those found for australites, philippinites and thailandites, but not the javanites and indochinites. Evaluation of these and other reported data show that compositional similarities between the IVC tektites and green or black Bosumtwi Crater glasses strongly support the hypothesis of a common impact origin-i.e. the Bosumtwi Crater site. Comparison of the IVC tektite composition with those of returned lunar materials (gabbros, basalts, breccia and soils) do not support a lunar origin for the Ivory Coast tektites. ?? 1972.

  3. New data on selected Ivory Coast tektites.

    NASA Technical Reports Server (NTRS)

    Cuttitta, F.; Carron, M. K.; Annell, C. S.

    1972-01-01

    Fourteen Ivory Coast tektites exhibit a range of bulk indices of refraction of 1.5156 to 1.5217 plus or minus 0.0004 and of bulk specific gravities of 2.428 to 2.502 plus or minus 0.005. Seven of these Ivory Coast (IVC) tektites were analyzed for major and minor element content. Compared to tektites from other strewn fields, their SiO2 content is low (67.2-69.1%), Al2O3 relatively high (15.8-16.8%), and total iron relatively high but with a more restricted range (6.3-6.8% as FeO). Their lime content is low (0.71-1.35%) compared to Australasian tektites but their MgO/CaO ratio (about 3.1) is unusually high. All other tektite groups have Na2O/K2O ratios less than unity, but the Na2O/K2O ratio of the IVC tektites is slightly greater than unity. Their K/Rb ratios range from 200 to 256 and average 227.

  4. Geochemistry and age of Ivory Coast tektites and microtektites

    NASA Astrophysics Data System (ADS)

    Koeberl, Christian; Bottomley, Richard; Glass, Billy P.; Storzer, Dieter

    1997-04-01

    Ivory Coast tektites were first reported in 1934 from a geographically restricted area at Ivory Coast, West Africa. Although some additional specimens have been found later, the total number remains small (a few hundred). The Bosumtwi impact crater in Ghana is most likely the source crater for the Ivory Coast tektites, based on the finding that the tektites and the crater have the same age as well as similar isotopic and chemical compositions. In addition to tektites on land, microtektites were found in (so far) eleven deep-sea cores off the West African coast, between about 9°N and 11°S and 0° and 23°W, defining the extent of the Ivory Coast tektite strewn field. In this study we analyzed eleven Ivory Coast tektites for their major and trace element composition, studied their petrographical characteristics, provided major element data for 111 microtektites, and major and trace element data for four microtektites. We determined the 40Ar sbnd 39Ar step-heating age of five Ivory Coast tektites and four microtektites and obtained fission-track dates for ten tektites and one Bosumtwi impact glass. The tektites have very small intersample and intrasample variations of their major and trace element composition. 111 Ivory Coast microtektites from eleven cores were analyzed for their major element compositional range. Their compositional range is significantly wider than that of the Ivory Coast tektites, but the majority of all microtektites have compositions very similar to those of the tektites (within a factor of 1.2). Trace element compositions of the tektites also show little variation between samples. The samples do not show any distinct Eu anomaly in the REE patterns. This characteristic, as well as the high absolute REE abundances and La NYb N ratios of about 8, indicate that Archean rocks are plausible source rocks. The major and trace element contents of four individually analyzed Ivory Coast microtektites show compositions that are very similar to those of the Ivory Coast tektites. However, the microtektites contain >20 rel% higher abundances of some of the lithophile and siderophile trace elements, such as Sc, Cr, Co, Ni, Sr, Zr, Ba, Hf, Ta, Th, and the REEs. These differences are probably due to incorporation of a higher abundance of accessory trace minerals with the microtektite-forming melt. The Ivory Coast microtektites also have a uniform internal composition. Duplicate 40Ar sbnd 39Ar step-heating age analyses were performed on five tektites. The best age estimate for the formation age of the tektites was calculated by taking a weighted average of the ages from the plateau portions of the runs, resulting in an age of 1.1 ± 0.05 Ma. We also tried to date four microtektites by 40Ar sbnd 39Ar age analyses, but their young age and small sample size makes it impossible to assign a reliable age to the microtektites. One run yielded satisfactory results that were similar to the tektite age. In addition, we determined the fission-track ages for ten individual Ivory Coast tektite samples and for one impact glass sample from the Bosumtwi crater. The track-size corrected ages for the Ivory Coast tektites ranged from 0.91 to 1.18 Ma, resulting in an average fission-track age of 1.05 ± 0.11 Ma. This age is, within errors, identical to that of the Bosumtwi impact glass at 1.03 ± 0.11 Ma, and to the 40Ar sbnd 39Ar age of 1.1 ± 0.05 Ma. The preferred age of the Ivory Coast tektite event is 1.07 Ma.

  5. Detection of a meteoritic component in Ivory Coast tektites with rhenium-osmium isotopes

    Microsoft Academic Search

    Christian Koeberl; Steven B. Shirey

    1993-01-01

    Measurement of rhenium (Re) and osmium (Os) concentrations and Os isotopic compositions in Ivory Coast tektites (natural glasses with upper crustal compositions that are ejected great distances during meteorite impact) and rocks from the inferred source crater, Lake Bosumtwi, Ghana, show that these tektites incorporate about 0.6 percent of a meteoritic component. Analysis of elemental abundances of noble metals alone

  6. Oxygen isotopes as tracers of tektite source rocks: An example from the Ivory Coast tektites and Lake Bosumtwi Crater

    NASA Technical Reports Server (NTRS)

    Blum, Joel D.; Koeberl, Christian; Chamberlain, C. Page

    1993-01-01

    Oxygen isotope studies of tektites and impact glasses provide an important tool to help in identifying the target lithologies for terrestrial impacts, including the K-T boundary impact. However, such studies may be complicated by modification of the original oxygen isotope values of some source rocks during the tektite formation process either by vapor fractionation or incorporation of meteoric water. To further investigate the relationship between the oxygen isotopic composition of tektites and their source rocks, Ivory Coast tektites and samples of impact glasses and bedrock lithologies from the Bosumtwi Crater in Ghana--which is widely believed to be the source crater for the Ivory Coast tektites--were studied. Our preliminary results suggest that the phyllites and metagraywackes from the Bosumtwi Crater were the predominant source materials for the impact glasses and tektites and that no significant oxygen isotope modification (less than 1 percent delta(O-18)) took place during impact melting. This contrasts with previous studies of moldavites and Australasian tektites and their sedimentary source materials which suggests a 4 to 5 percent lowering of delta(O-18) due to meteoric water incorporation during impact melting.

  7. Petrology and geochemistry of target rocks from the Bosumtwi impact structure, Ghana, and comparison with Ivory Coast tektites

    Microsoft Academic Search

    Christian Koeberl; WolfUwe Reimold; Joel D. Blum; C. Page Chamberlain

    1998-01-01

    The 10.5 km diameter Bosumtwi crater in Ghana, West Africa, is the most likely source crater for the Ivory Coast tektites, as the tektites and the crater have the same age (1.07 Ma), and there are close similarities between the isotopic and chemical compositions of the tektites and crater rocks. The crater is excavated in 2.1–2.2 Ga old metasediments and

  8. Trace Elements in Ivory Coast Tektites, Microtektites, and Fallback Particles of the Lake Bosumtwi Impact Crater, Ghana: A LA-ICP-MS Study

    NASA Astrophysics Data System (ADS)

    Luetke, S.; Deutsch, A.; Berndt, J.; Langenhorst, F.

    2008-03-01

    LA-ICP-MS trace element data of Ivory Coast tektites, microtektites, and glassy fallback particles indicate a soil contribution to the precursor materials of the tektites. A variable Ni/Co ratio seems to be characteristic of the fallback particles.

  9. Petrology and geochemistry of target rocks from the Bosumtwi impact structure, Ghana, and comparison with Ivory Coast tektites

    NASA Astrophysics Data System (ADS)

    Koeberl, Christian; Reimold, Wolf Uwe; Blum, Joel D.; Chamberlain, C. Page

    1998-06-01

    The 10.5 km diameter Bosumtwi crater in Ghana, West Africa, is the most likely source crater for the Ivory Coast tektites, as the tektites and the crater have the same age (1.07 Ma), and there are close similarities between the isotopic and chemical compositions of the tektites and crater rocks. The crater is excavated in 2.1-2.2 Ga old metasediments and metavolcanics of the Birimian Supergroup. Here we present the first integrated petrographic and geochemical study of rocks from the Bosumtwi impact crater. A variety of target rocks from the Bosumtwi impact structure were selected to represent the major rock types that have been described before, resulting in four groups: shale, phyllite-graywacke, and two different types of granites (from dispersed dikes and from the so-called Pepiakese intrusion at the northeastern side of the crater). These rocks were analyzed for their major and trace element composition and their petrographic characteristics. In addition, representative samples were also analyzed for their O, Sr, and Nd isotopic compositions. The target rocks do not show any unambiguous evidence of shock metamorphism (i.e., planar deformation features, PDFs). Distinct impact-characteristic shock effects (PDFs) were identified only in clasts within suevite-derived melt fragments. The compositional range of the target rocks is significantly wider than that of the Ivory Coast tektites, but overlap the tektite compositions. A best-fit line for the Bosumtwi crater rocks in a Rb-Sr isotope evolution diagram yields an "age" of 1.98 Ga, and an initial 87Sr/ 86Sr ratio of 0.701, which is close to results previously obtained for granitoid intrusions in the Birimian of Ghana. Our Nd isotopic data yield depleted mantle model ages ranging from 2.16 to 2.64 Ga, and ? Nd values of -17.2 to -25.9‰. Harmonic least-squares (HMX) mixing calculations were able to reproduce the composition of Ivory Coast tektites from a mixture of Bosumtwi country rocks that include about 70% phyllite-graywacke, 16% granite dike, and 14% Pepiakese granite. The oxygen isotopic composition of the metasedimentary rocks and granite dikes (? 18O = 11.3-13.6‰) and the tektites (? 18O = 11.7-12.9‰, also this work) agree fairly well, while the Pepiakese granites have lower values (? 18O = 8.6-9.0‰), indicating that only minor amounts of these rocks were incorporated in the formation of the Ivory Coast tektites. The large variation in Sr and Nd isotopic compositions of the target rocks do not allow the unambiguous identification of distinct endmember compositions, but in both a 87Sr/ 86Sr vs. 1/Sr plot and an ? Sr vs. ? Nd diagram, the tektites plot within the area occupied by the metasedimentary and granitic Bosumtwi crater rocks. Thus, our data support the interpretation that the composition of the Ivory Coast tektites is similar to that of rocks exposed at the Bosumtwi impact structure, indicating formation during the same impact event.

  10. Ivory Coast.

    PubMed

    1985-07-01

    Since the Ivory Coast's independence (1960), the population has increased from 3.7 million to 9.7 million, representing a growth rate of up to 4.2%. The country's 5th 5-Year Plan (1981-85) has 4 priorities: 1) agricultural modernization, 2) traditional industry and crafts modernization, 3) human resources enhancement, and 4) continued economic growth. Population objectives include 1) increasing peasant aid, 2) making education more development oriented, 3) making health care more accessible, and 4) finding solutions to employment and unemployment problems. The government wants to increase population size because it needs labor for economic development. Programs 1) develop areas with high out-migration, 2) reduce maternal and child mortality, and 3) support family planning only to benefit family well being. Although the Ivory Coast's population will reach 15 million by the year 2000, and population density has tripled since 1950, the country is still thinly populated. The current population policy strives to 1) reduce infant mortality, 2) maintain fertility, and 3) diminish immigration and emigration. Life expectancy is 47 years, infant mortality is 122/1000, and most rural people have no health services. The government considers the total fertility rate of 6.7 satisfactory. Abortion for contraceptive purposes and sterilization are illegal; access to contraception is limited. The Ivory Coast, because of rapid economic growth, attracts immigrants from neighboring countries; at present 1/3 of the population is foreign-born. The government is trying to integrate natives more fully into the labor force. There is little emigration, but internal migration involves almost half of the population. The government attempts to 1) slow down and redirect rural to urban migration to small and medium sized towns and 2) slow rural to rural migration from the savannah to the forest zone. PMID:12314235

  11. URBAN EXTENTS Ivory Coast

    E-print Network

    Columbia University

    URBAN EXTENTS Benin Ivory Coast Ghana Mali Mauritania Niger Togo GRUMPv1 ´ 0 75 150 Km Lambert Azimuthal Equal Area Projection Urban Extent Administrative Units National Boundaries Note: National boundaries are derived from the population grids and thus may appear coarse. Urban extents illustrate

  12. Tektites and their origin

    NASA Technical Reports Server (NTRS)

    Okeefe, J. A.

    1976-01-01

    Questions concerning the tektite distribution are examined, taking into account the Australasian strewn field, the Ivory Coast strewn field, the Moldavite strewn field, the North American strewn field, the Libyan desert glass, the Aouelloul crater glass, and amerikanites. Attention is given to the shapes of tektites, the internal structure of tektites, the physical properties of tektite glass, the chemical composition of tektites, isotopes, fission tracks, cosmic ray tracks, and arguments in favor and against the terrestrial origin of tektites. It is concluded that tektites cannot be terrestrial in origin. They are probably volcanic ejects, of geologically recent epochs, from one or a number of lunar volcanoes.

  13. Single crystal U–Pb zircon age and Sr–Nd isotopic composition of impactites from the Bosumtwi impact structure, Ghana: Comparison with country rocks and Ivory Coast tektites

    PubMed Central

    Ferrière, Ludovic; Koeberl, Christian; Thöni, Martin; Liang, Chen

    2010-01-01

    The 1.07 Myr old Bosumtwi impact structure (Ghana), excavated in 2.1–2.2 Gyr old supracrustal rocks of the Birimian Supergroup, was drilled in 2004. Here, we present single crystal U–Pb zircon ages from a suevite and two meta-graywacke samples recovered from the central uplift (drill core LB-08A), which yield an upper Concordia intercept age of ca. 2145 ± 82 Ma, in very good agreement with previous geochronological data for the West African Craton rocks in Ghana. Whole rock Rb–Sr and Sm–Nd isotope data of six suevites (five from inside the crater and one from outside the northern crater rim), three meta-graywacke, and two phyllite samples from core LB-08A are also presented, providing further insights into the timing of the metamorphism and a possibly related isotopic redistribution of the Bosumtwi crater rocks. Our Rb–Sr and Sm–Nd data show also that the suevites are mixtures of meta-greywacke and phyllite (and possibly a very low amount of granite). A comparison of our new isotopic data with literature data for the Ivory Coast tektites allows to better constrain the parent material of the Ivory Coast tektites (i.e., distal impactites), which is thought to consist of a mixture of metasedimentary rocks (and possibly granite), but with a higher proportion of phyllite (and shale) than the suevites (i.e., proximal impactites). When plotted in a Rb/Sr isochron diagram, the sample data points (n = 29, including literature data) scatter along a regression line, whose slope corresponds to an age of 1846 ± 160 Ma, with an initial Sr isotope ratio of 0.703 ± 0.002. However, due to the extensive alteration of some of the investigated samples and the lithological diversity of the source material, this age, which is in close agreement with a possible “metamorphic age” of ? 1.8–1.9 Ga tentatively derived from our U–Pb dating of zircons, is difficult to consider as a reliable metamorphic age. It may perhaps reflect a common ancient source whose Rb–Sr isotope systematics has not basically been reset on the whole rock scale during the Bosumtwi impact event, or even reflect another unknown geologic event. PMID:21037794

  14. Single crystal U-Pb zircon age and Sr-Nd isotopic composition of impactites from the Bosumtwi impact structure, Ghana: Comparison with country rocks and Ivory Coast tektites.

    PubMed

    Ferrière, Ludovic; Koeberl, Christian; Thöni, Martin; Liang, Chen

    2010-08-01

    The 1.07 Myr old Bosumtwi impact structure (Ghana), excavated in 2.1-2.2 Gyr old supracrustal rocks of the Birimian Supergroup, was drilled in 2004. Here, we present single crystal U-Pb zircon ages from a suevite and two meta-graywacke samples recovered from the central uplift (drill core LB-08A), which yield an upper Concordia intercept age of ca. 2145 ± 82 Ma, in very good agreement with previous geochronological data for the West African Craton rocks in Ghana. Whole rock Rb-Sr and Sm-Nd isotope data of six suevites (five from inside the crater and one from outside the northern crater rim), three meta-graywacke, and two phyllite samples from core LB-08A are also presented, providing further insights into the timing of the metamorphism and a possibly related isotopic redistribution of the Bosumtwi crater rocks. Our Rb-Sr and Sm-Nd data show also that the suevites are mixtures of meta-greywacke and phyllite (and possibly a very low amount of granite). A comparison of our new isotopic data with literature data for the Ivory Coast tektites allows to better constrain the parent material of the Ivory Coast tektites (i.e., distal impactites), which is thought to consist of a mixture of metasedimentary rocks (and possibly granite), but with a higher proportion of phyllite (and shale) than the suevites (i.e., proximal impactites). When plotted in a Rb/Sr isochron diagram, the sample data points (n = 29, including literature data) scatter along a regression line, whose slope corresponds to an age of 1846 ± 160 Ma, with an initial Sr isotope ratio of 0.703 ± 0.002. However, due to the extensive alteration of some of the investigated samples and the lithological diversity of the source material, this age, which is in close agreement with a possible "metamorphic age" of ? 1.8-1.9 Ga tentatively derived from our U-Pb dating of zircons, is difficult to consider as a reliable metamorphic age. It may perhaps reflect a common ancient source whose Rb-Sr isotope systematics has not basically been reset on the whole rock scale during the Bosumtwi impact event, or even reflect another unknown geologic event. PMID:21037794

  15. Violence in the Ivory Coast

    NSDL National Science Digital Library

    After Sunday's presidential election in the Ivory Coast (or Cote d'Ivoire), violence broke out when two candidates, the Ivory Coast's military ruler, General Robert Guei, and Laurent Gbagbo, Guei's main opponent, both declared that they had won the election. Thousands of Gbagbo supporters protested in the streets of the country's capitol, Abidjan and were met by military authorities, who responded with live ammunition, teargas, and batons. In the following three days, at least 60 people were killed. The conflict has also threatened relations between the Ivory Coast's ethnic groups. Guei's supporters mainly live in the country's northern, Muslim region, while Gbagdo represents the Christians living in the western and southern regions. Both mosques and churches have been looted and set on fire. On Thursday the official vote was released by the national electoral commission: Gbagbo received 59 percent of the vote, and Guei, 32 percent. Later that day, Gbagdo was swore in as president, as Guei went into hiding. The violence in Abidjan seems to have settled. Today, Gbagdo named Affi N'Guessan as the Ivory Coast's new prime minister. Previously, N.Guessan was the Minister of Industry and Tourism in Guei's government. The new president has also vowed to keep Guei's timetable to return the Ivory Coast to democracy.

  16. Pepper veinal mottle virus in Ivory Coast

    Microsoft Academic Search

    J. J. De Wijs

    1973-01-01

    A mosaic and stunt disease of chilli pepper (Capsicum frutescens) in Ivory Coast was found to be caused by pepper veinal mottle virus, a member of the potato virus Y group, recently described from chilli pepper in Ghana. The Ivory Coast isolate was first transmitted by aphids toPhysalis floridana and subsequently maintained by mechanical inoculation inP. floridana andNicotiana megalosiphon. The

  17. North-American Microtektites are More Oxidised than Tektites

    NASA Astrophysics Data System (ADS)

    Giuli, G.; Cicconi, M. R.; Eeckhout, S. G.; Koeberl, C.; Glass, B. P.; Pratesi, G.; Paris, E.

    2012-09-01

    North American (NA) microtektites display Fe3+/Fetot ratios from 0 to 0.75, much higher than microtektites from Ivory Coast and Australasian strewn fields. FTIR determined water content compare well with NA tektites, suggesting lack of alteration.

  18. Phillips goes subsea trees in Ivory Coast

    SciTech Connect

    Bryngelson, R.H.

    1982-11-15

    Describes installation of 3 wet, diver-assist trees, in the Espoir field offshore Ivory Coast, as part of Phillips Petroleum's plans to use 5 satellite wells with downhole completion equipment and subsea production trees. Simplicity in design and attention to training has resulted in an installation time of about 3 weeks for one of the largest subsea trees in the industry. Presents diagram showing the converted jackup, Dan Duke drilling unit, which supports equipment to handle production from subsea wells.

  19. [Implementation of palliative care in Ivory Coast].

    PubMed

    Coulibaly, J Didi-Kouko; Datie, A-M; Binlin-Dadie, R; Kouame, I; N'guessan, Zc; Barouan, M-C; Koffi, E; Coulibaly, I; Mensah, J; Yenou, H Memain; Dedomey, E; Echimane, Ka; Plo, Kj; Kouassi, B

    2009-05-01

    Ivory Coast adhered to the strategy of the primary cares of health whose leading principles served basis to the definition of the National politics of sanitary development, exposed in the National plan of sanitary development 1996-2005. The improvement of the quality of the cares is the main objective of this plan. The attack of this objective cannot make itself without the hold in account of the palliative cares that are a component of the cares for the patients affected by chronic and incurable affections, since the diagnosis until the death and even after the death. Conscious of the necessity to develop the palliative cares to improve the quality of life of the patients and their families, the ministry in charge of health, in collaboration with the partners to the development, initiated a project of development of the palliative care in Ivory Coast. It is about an innovating gait in Ivory Coast concerning politics of health. This work has for goal to present the big lines and the setting in which this politics has been put in place. PMID:19423486

  20. Phillips goes subsea trees in Ivory Coast

    SciTech Connect

    Bryngelson, R.H.

    1982-11-15

    Describes installation of 3 satellite subsea trees in 500 ft of water from a semisubmersible drilling rig. These wet, diver-assist trees are part of Phillips Petroleum's early development and production program (EDPP) for the Espoir field offshore Ivory Coast, with plans calling for 5 satellite wells with downhole completion equipment and subsea production trees. Diagram shows how a converted jackup, Dan Duke, supports equipment to handle production from subsea wells. Table gives time breakdown of subsea tree installation. Before mobilizing the subsea trees, control system, and tubulars to the rig, a study of deck layout, payloads, and traffic patterns was performed. Concludes that, based on experience in this project and the cost differences between purchase and installation costs, final success is 90% dependent on informed and trained field personnel after engineering, design, and manufacturing; attention to installation procedures and training of field and operational personnel are as critical or more critical than design changes to equipment; and selection of a supplier for high technology equipment, based on a low bid alone, may not translate into lower installation costs.

  1. Catch Efficiencies of Purse and Beach Seines in Ivory Coast Lagoons

    E-print Network

    Catch Efficiencies of Purse and Beach Seines in Ivory Coast Lagoons Emmanuel Charles-Dominique ABSTRACT: Catch efficiencies of two commonly used fishing gears. in Ivory Coast lagoons, purse seine fisheries are well developed in Ivory Coast lagoons, yielding from 10,000 to 20,000 tons of commercially

  2. Primary productivity of a Hevea forest in the Ivory Coast B.A. Monteny

    E-print Network

    Paris-Sud XI, Université de

    Primary productivity of a Hevea forest in the Ivory Coast B.A. Monteny ORSTOM, Bioclimatologie- duction rates of a Hevea forest located in the humid tropical zone of the Ivory Coast have been calculated, at Dabou-Ousrou, near Abid- jan (5°19' N, 04"30' W), Ivory Coast. The tropi- cal forest zone is under

  3. Evolution of a Paleoproterozoic "weak type" orogeny in the West African Craton (Ivory Coast)

    E-print Network

    Paris-Sud XI, Université de

    Evolution of a Paleoproterozoic "weak type" orogeny in the West African Craton (Ivory Coast) M The Paleoproterozoic domain of the Ivory Coast lies in the central part of the West African Craton (WAC) and is mainly. Results of the structural analysis, focused on three areas within the Ivory Coast, suggest

  4. Isotopic fractionation of zinc in tektites

    NASA Astrophysics Data System (ADS)

    Moynier, Frederic; Beck, Pierre; Jourdan, Fred; Yin, Qing-Zhu; Reimold, Uwe; Koeberl, Christian

    2009-01-01

    Tektites are terrestrial natural glasses produced during a hypervelocity impact of an extraterrestrial projectile onto the Earth's surface. The similarity between the chemical and isotopic compositions of tektites and terrestrial upper continental crust implies that the tektites formed by fusion of such target rock. Tektites are among the driest rocks on Earth. Although volatilization at high temperature may have caused this extreme dryness, the exact mechanism of the water loss and the behavior of other volatile species during tektite formation are still debated. Volatilization can fractionate isotopes, therefore, comparing the isotope composition of volatile elements in tektites with that of their source rocks may help to understand the physical conditions during tektite formation. For this study, we have measured the Zn isotopic composition of 20 tektites from four different strewn fields. Almost all samples are enriched in heavy isotopes of Zn compared to the upper continental crust. On average, the different groups of tektites are isotopically distinct (listed from the isotopically lightest to the heaviest): Muong-Nong type indochinites ( ?66/64Zn = 0.61 ± 0.30‰); North American bediasites ( ?66/64Zn = 1.61 ± 0.49‰); Ivory Coast tektites ( ?66/64Zn = 1.66 ± 0.18‰); the Australasian tektites (others than the Muong Nong-type indochinites) ( ?66/64Zn = 1.84 ± 0.42‰); and Central European moldavites ( ?66/64Zn = 2.04 ± 0.19‰). These results are contrasted with a narrow range of ?66/64Zn = 0-0.7‰ for a diverse spectrum of upper continental crust materials. The elemental abundance of Zn is negatively correlated with ?66/64Zn, which may reflect that isotopic fractionation occurred by evaporation during the heating event upon tektite formation. Simple Rayleigh distillation predicts isotopic fractionations much larger than what is actually observed, therefore, such a model cannot account for the observed Zn isotope fractionation in tektites. We have developed a more realistic model of evaporation of Zn from a molten sphere: during its hypervelocity trajectory, the molten surface of the tektite will be entrained by viscous coupling with air that will then induce a velocity field inside the molten sphere. This velocity field induces significant radial chemical mixing within the tektite that accelerates the evaporation process. Our model, albeit parameter dependent, shows that both the isotopic composition and the chemical abundances measured in tektites can be produced by evaporation in a diffusion-limited regime.

  5. North-American Microtektites are More Oxidised than Tektites

    NASA Astrophysics Data System (ADS)

    Giuli, G.; Cicconi, M. R.; Eeckhout, S. G.; Koeberl, C.; Glass, B. P.; Pratesi, G.; Paris, E.

    2012-03-01

    Microtektites from the Australasian and Ivory Coast strewn fields (SF) show low values of the Fe^3^+/Fe_t_o_t ratio, comparable to tektites from the same SF. In contrast, microtektites from the North American SF show a wider range (from 0 to 0.75).

  6. Ivory Coast-Ghana margin: model of a transform margin

    Microsoft Academic Search

    J. Mascle; E. Blarez

    1987-01-01

    The authors present a marine study of the eastern Ivory Coast-Ghana continental margins which they consider one of the most spectacular extinct transform margins. This margin has been created during Early-Lower Cretaceous time and has not been submitted to any major geodynamic reactivation since its fabric. Based on this example, they propose to consider during the evolution of the transform

  7. Antiparasitic activities of medicinal plants used in Ivory Coast

    Microsoft Academic Search

    T Okpekon; S Yolou; C Gleye; F Roblot; P Loiseau; C Bories; P Grellier; F Frappier; A Laurens; R Hocquemiller

    2004-01-01

    During an ethnopharmacological survey of antiparasitic medicinal plants used in Ivory Coast, 17 plants were identified and collected. Polar, non-polar and alkaloidic extracts of various parts of these species were evaluated in vitro in an antiparasitic drug screening. Antimalarial, leishmanicidal, trypanocidal, antihelminthiasis and antiscabies activities were determined. Among the selected plants, Anogeissus leiocarpus and Terminalia glaucescens were strongly active against

  8. Sediment trace metal contamination in the Ivory Coast, West Africa

    Microsoft Academic Search

    Issifou Kouadio; John H. Trefry

    1987-01-01

    To help expand our global perspective on trace metal contamination, concentrations of Cu, Fe, Hg, Mn, Ni, Pb, and Zn were determined for sediments from the Ebrie Lagoon in the Ivory Coast, a developing West African nation. Excess loading of several metals, especially Hg, Pb, and Zn was found at several sites. The maximum concentration of Hg measured in sediments

  9. What it is like to live in the Ivory Coast

    SciTech Connect

    Liddell, W.W.

    1981-09-01

    Exploration and production activity is increasing in the Ivory Coast on the strength of a small discovery by Exxon in 1977 and unofficial reports that Phillips has found a field in deep water which approaches Prudhoe Bay in size. Phillips is bringing five offshore rigs into Ivoirian waters.

  10. Analysis of the Ivory Coast Educational Television Project

    ERIC Educational Resources Information Center

    Gibbons, R. Arnold

    1975-01-01

    A critical assessment of the potential impact and ideological implications of the large scale introduction of television to the Ivory Coast, as a reinforcer of the attitudes of the dominant elite educated abroad and a bastion of urbanity and middle class influence as opposed to the nurturing of traditional indigenous culture. Also considered is…

  11. Characterisation of kaolinitic clays from the Ivory Coast (West Africa)

    Microsoft Academic Search

    J. Sei; A. Abba Touré; J. Olivier-Fourcade; H. Quiquampoix; S. Staunton; J. C. Jumas; M. Womes

    2004-01-01

    Clays from different deposits in the Ivory Coast (Adattié (ADA), Nieki (NIE), Grand-Bassam (BAS), Nigui-Saff (NS)) were studied using various techniques. Their chemical compositions were determined by X-ray fluorescence and the most important crystalline phases were identified by X-ray diffraction. Kaolinite is the dominant mineral phase with minor amounts of other minerals including quartz, haematite, goethite, lepidocrocite and illite. The

  12. The Influence of Predisposing, Enabling and Need Factors on Condom Use in Ivory Coast

    ERIC Educational Resources Information Center

    Ngamini Ngui, Andre

    2010-01-01

    The main objective of this study was to identify key determinants of condom use in Ivory Coast. Data stem from Ivory Coast Demographic Health Survey (DHS) conducted by ORC Macro in 2005 among a representative sample of 9,686 persons aged 15 - 49. Following the behavioral model, we use logistic regression to assess the effect of predisposing,…

  13. [Traditional health practitioners and epilepsies in Ivory Coast].

    PubMed

    François, A A; Elisée, B K; Christian, T A; Armel, K H; Any, G; Tchwa, A M; Constance, Y A

    2014-01-01

    We report the results of a descriptive 3-month observational study concerning the experience and knowledge about epilepsy of 30 traditional health practitioners in the Ivory Coast. Most respondents were men over 30 years of age. They had an average of 14.3 years of professional experience. More than half of respondents (54%) had not attended school. All traditional practitioners knew that epilepsy was a brain disease. For 83.3% of them, the disease was supernatural, due to a curse. These traditional healers knew all the clinical manifestations of generalized tonico-clonic seizure. For over 72% of them, noise, presence of a public, nervousness and coffee consumption were factors favoring seizures. Sixty percent of the traditional healers still believed in the contagiousness of epilepsy, and all claimed to cure it by traditional treatment. Most all healers (97%) used plant products, but only 10% released the name of the plants used (Rubiaceae or Lamiaceae families). This survey highlights the urgency of awareness campaigns and the need for training of Ivorian traditional healers and the necessity to improve the collaboration between modern and traditional medicine. PMID:25193012

  14. On the occurrence of gold mineralizations in southeastern Ivory Coast

    NASA Astrophysics Data System (ADS)

    Kadio, E.; Coulibaly, Y.; Allialy, M. E.; Kouamelan, A. N.; Pothin, K. B. K.

    2010-07-01

    Gold mineralizations are known to occur in the Paleoproterozoic (Birimian) formations of the Aboisso area, southeastern Ivory Coast. These formations, which have been structured during the Eburnean orogeny, mainly consist of volcanic, volcaniclastic and sedimentary rocks intruded by granitic, basic and ultrabasic plutons. Exploration of these terranes has revealed numerous gold mineralizations, the most significant of which are located in the Aféma shear zone. Four distinct types of mineralizations can be distinguished based on the typology of the host rocks. These include mineralizations enclosed in highly silicified volcanic rocks (type 1), mineralizations closely related to intense silicification of metasedimentary rocks (type 2), mineralizations associated with silicified polygenic conglomerates (type 3), and mineralizations encountered in brecciated and silicified zones within a metadiorite sill (type 4). Gold is observed either as free gold, or in association with pyrite, arsenopyrite, sphalerite, chalcopyrite, ±pyrrhotite, ±galena, ±anatase, ±monazite, ±magnetite. Gold and the various sulfides are mostly of hydrothermal epigenetic origin. The fact that the gold mineralizations occurs in brecciated and silicified zones around granitoid intrusions clearly indicates that post-magmatic hydrothermal activity and tectonics exerted a major control during the mineralization process.

  15. Evidence of Tool-using by Chimpanzees in the Ivory Coast

    Microsoft Academic Search

    T. T. Struhsaker; P. Hunkeler

    1971-01-01

    Indirect evidence was collected in Ivory Coast for the use of sticks and stones by chimpanzees to open the nuts of Coula edulis and Panda oleosa. 26 nut-smashing places at 15 different sites are described.Copyright © 1971 S. Karger AG, Basel

  16. Evidence for transform margin evolution from the Ivory Coast-Ghana continental margin

    Microsoft Academic Search

    Jean Mascle; Emmanuel Blarez

    1987-01-01

    Results are presented from a recent study (Blarez and Mascle, 1986) of the northern Gulf of Guinea margins, particularly off the eastern Ivory Coast and Ghana, where the continental margin is one of the best-preserved examples of an extinct transform margin. The observations support a four-stage model for transform margin evolution. Tectonically active transform contacts, first between normal continental crusts

  17. Analysis of the temporal variability of runoff in Ivory Coast: statistical approach and phenomena characterization

    Microsoft Academic Search

    A. A. AKA; E. SERVAT; J. E. PATUREL; B. KOUAMÉ; H. LUBES; J. M. MASSON

    1997-01-01

    The runoffs at four Ivory Coast hydrometric stations (monitoring flows from an area covering between 5930 and 66500 km2) were analysed with a set of statistical methods for the detection of breaks in the time series. The variables studied were the annual mean discharge and some characteristic discharges. From a quantitative standpoint, the existence of a clear break in the

  18. Some aspects of the epidemiology of African cassava mosaic virus in Ivory Coast

    Microsoft Academic Search

    C. Fauquet; D. Fargette; J. C. Thouvenel

    1988-01-01

    Re?infection of healthy cassava plants by African cassava mosaic virus (ACMV) was followed In different varieties and for several years at various locations in two regions of Ivory Coast. Whitefly populations on cassava and virus incidence varied widely between sites, even amongst those close to one another. However, for each location and in every year, the spread of ACMV showed

  19. The Political Ecology of Peasant-Herder Conflicts in the Northern Ivory Coast

    Microsoft Academic Search

    Thomas J. Bassett

    1988-01-01

    Following the great Sahelian drought of the early 1970s, an unprecedented number of Fulani pastoralists immigrated to the Ivory Coast with their cattle. Although welcomed by the Ivorian government for their contribution to national beef production, the Fulani's presence has been bitterly opposed by Senufo peasants in the savanna region over the problem of uncompensated crop damage. I examine the

  20. High Genetic Diversity Among Strains of Fusarium oxysporum f. sp. vasinfectum from Cotton in Ivory Coast.

    PubMed

    Abo, Kouabenan; Klein, Keith K; Edel-Hermann, Véronique; Gautheron, Nadine; Traore, Dossahoua; Steinberg, Christian

    2005-12-01

    ABSTRACT Seventeen isolates of Fusarium oxysporum f. sp. vasinfectum from the Ivory Coast were characterized using vegetative compatibility group (VCG), restriction fragment length polymorphism of the ribosomal inter-genic spacer region (IGS), and mating type (MAT) idiomorph, and compared with a worldwide collection of the pathogen containing all available reference strains. Some of the isolates were identical to known reference strains for all three traits, whereas others had previously unknown varieties of IGS and (possibly) VCG. One or the other MAT idiomorph was present in each of the new isolates and the reference strains. The new isolates and reference strains were grouped based upon the three traits. Strains from the Ivory Coast were found in 7 of 11 groups detected, suggesting multiple sources for Fusarium wilt in the country. Despite the presence of both MAT idiomorphs among isolates, no evidence for recombination was found. PMID:18943549

  1. Characterisation of Kaolinitic Clays from the Ivory Coast: Identification of Structural Fe

    Microsoft Academic Search

    J. Sei; A. Abba Touré; J. Olivier-Fourcade; H. Quiquampoix; S. Staunton; J. C. Jumas; M. Womes

    2004-01-01

    Five clays from four different deposits in the Ivory Coast (Adattié, Nieki, Grand-Bassam, Nigui-Saff) were studied by 57Fe Mössbauer spectroscopy and electron paramagnetic resonance (EPR) at room temperature. Their chemical compositions were\\u000a determined by X-ray fluorescence and the most important crystalline phases were identified by X-ray diffraction. In these\\u000a natural clays, kaolinite is the dominant mineral phase with minor amounts

  2. A new species of Furculanurida (Collembola: Neanuridae) from Ivory Coast, with comments on related genera.

    PubMed

    Zon, Serge Demeango; Tano, Yao; Deharveng, Louis

    2014-01-01

    A new species of Pseudachorutinae, Furculanurida emucronata sp. nov., is described from Lamto in the Ivory Coast. It differs from all known Pseudachorutinae species by the presence of a strong lateral tooth on the claw of leg I, and from other species of the genus Furculanurida by the absence of a mucro. It is provisionally assigned to the genus Furculanurida which is redefined accordingly. The heterogeneity of the genus is stressed, and its relationships with Arlesiella, Kenyura, Pseudachorutes and Stachorutes are discussed. PMID:25544461

  3. Serological survey of canine leptospirosis in three countries of tropical Africa: Sudan, Gabon and Ivory Coast.

    PubMed

    Roqueplo, Cédric; Marié, Jean-Lou; André-Fontaine, Geneviève; Kodjo, Angeli; Davoust, Bernard

    2015-02-01

    A cross-sectional survey was conducted to estimate the presence of leptospiral antibodies among 475 dogs from three countries of tropical Africa: Sudan (n=62), Gabon (n=255) and Ivory Coast (n=158). Sixteen reference strains belonging to seven serogroups were used as antigen in the microscopic agglutination test. Overall, considering titres ?1:40, 453 samples were positive towards one or several serovars of pathogenic leptospires. Focusing on high titres, i.e. ?1:320, the seroprevalence was 40.8%. In Gabon, the seroprevalence was higher in rural areas than in an urban environment (p<0.001). In Ivory Coast, the seroprevalence for serogroups Icterohaemorrhagiae and Canicola was not statistically different according to the vaccinal status. Predominant serogroups varied according to the countries but Grippotyphosa and Sejroë were the most common, while Icterohaemorragiae and Canicola were dominant in Sudan. In these three countries, dogs are heavily exposed to pathogenic Leptospira and humans living in the same environment are also at risk of infection. PMID:25467033

  4. Evolution of a Paleoproterozoic “weak type” orogeny in the West African Craton (Ivory Coast)

    NASA Astrophysics Data System (ADS)

    Vidal, M.; Gumiaux, C.; Cagnard, F.; Pouclet, A.; Ouattara, G.; Pichon, M.

    2009-11-01

    The Paleoproterozoic domain of the Ivory Coast lies in the central part of the West African Craton (WAC) and is mainly constituted by TTG, greenstones, supracrustal rocks and leucogranites. A compilation of metamorphic and radiometric data highlights that: i) metamorphic conditions are rather homogeneous through the domain, without important metamorphic jumps, ii) HP-LT assemblages are absent and iii) important volumes of magmas emplaced during the overall Paleoproterozoic orogeny suggesting the occurrence of long-lived rather hot geotherms. Results of the structural analysis, focused on three areas within the Ivory Coast, suggest that the deformation is homogeneous and distributed through the Paleoproterozoic domain. In details, results of this study point out the long-lived character of vertical movements during the Eburnean orogeny with a two folds evolution. The first stage is characterized by the development of "domes and basins" geometries without any boundary tectonic forces and the second stage is marked by coeval diapiric movements and horizontal regional-scale shortening. These features suggest that the crust is affected by vertical movements during the overall orogeny. The Eburnean orogen can then be considered as an example of long-lived Paleoproterozoic "weak type" orogen.

  5. Aspects of the cycle of inorganic nitrogen compounds in the tropical rain forest of the Ivory Coast

    Microsoft Academic Search

    Jean Servant; Robert Delmas; Jacques Rancher; Marcel Rodriguez

    1984-01-01

    A partial balance of mineral N is given for the basins of two coastal rivers in a forest zone in the Ivory Coast. The dry and wet depositions on the basin surfaces is given for particulate matter (NO3-, NH4+). The quantity of mineral N washed away in the rivers is evaluated. The losses from leaching of the soils by rainwater

  6. [Ivory Coast].

    PubMed

    The capital of Cote d'Ivoire is Yamoussoukro. As of 1995, Cote d'Ivoire had a population of 14.3 million governed by a presidential, multiparty regime. 1994 gross national product and per capita income were, respectively, $7.1 billion and $510. Per capita income declined by 5.2% per year over the period 1985-94. In 1994, Cote d'Ivoire owed $18.452 billion, then being serviced at $2.144 billion. For the same year, Cote d'Ivoire exported $3.177 billion in goods and services and imported $3.59 billion. As of 1995, the population was growing in size by 3.2% annually. In 1992-93, life expectancy at birth was 51 years, the infant mortality rate was 92 per 1000 births, 30% had access to health services, and 76% had access to drinkable water. Other data are presented on the country's topography, climate and vegetation, demographics, principal cities, population distribution, religions, political structure, economics and finances, foreign commerce, and transportation and communications. PMID:12347085

  7. Lithium in tektites and impact glasses: Implications for sources, histories and large impacts

    NASA Astrophysics Data System (ADS)

    Magna, T.; Deutsch, A.; Mezger, K.; Skála, R.; Seitz, H.-M.; Mizera, J.; ?anda, Z.; Adolph, L.

    2011-04-01

    Lithium (Li) abundances and isotope compositions were determined in a representative suite of tektites (moldavites, Muong Nong-type tektites and an australite, Ivory Coast tektites and bediasites), impact-related glasses (Libyan Desert Glass, zhamanshinites and irghizites), a glass fragment embedded in the suevite from the Ries impact crater and sedimentary materials in order to test a possible susceptibility of Li to fractionation during hypervelocity impact events and to de-convolve links to their potential parental sources. The overall data show a large spread in Li abundance (4.7-58 ppm Li) and ? 7Li values (-3.2‰ to 26.0‰) but individual groups of tektites and impact glasses have distinctive Li compositions. Most importantly, any significant high-temperature Li isotope fractionation can be excluded by comparing sedimentary lithologies from central Europe with moldavites. Instead, we suggest that Li isotope compositions in tektites and impact-related glasses are probably diagnostic of the precursor materials and their pre-impact geological histories. The Muong Nong-type tektites and australite specimen are identical in terms of Li concentrations and ? 7Li and we tentatively endorse their common origin in a single impact event. Evidence for low-temperature Rayleigh fractionation, which must have operated prior to impact-induced melting and solidification, is provided for a subset of Muong Nong-type tektites. Although Li isotope variations in most tektites are broadly similar to those of the upper continental crust, Libyan Desert Glass carries high ? 7Li ?24.7‰, which appears to mirror the previous fluvial history of parental material that was perhaps deposited in lacustrine environment or coastal seawater. Lithium isotopes in impact-related glasses from the Zhamanshin crater define a group distinct from all other samples and point to melting of chemically less evolved mafic lithologies, which is also consistent with their major and trace element patterns. Extreme shock pressures and the related extreme post-shock temperatures alone appear not to have any effect on the Li isotope systematics; therefore, useful information on parental lithologies and magmatic processes may be retrieved from analyses of Martian and lunar meteorites. Moreover, lack of significant Li depletion in tektites provides further constraints on the loss of moderately volatile elements during the Moon-forming impact.

  8. [Aspects of malaria in a village of the humid savannah of the Ivory Coast].

    PubMed

    Dossou-Yovo, J; Ouattara, A; Doannio, J M; Riviere, F; Chauvancy, G; Meunier, J Y

    1994-01-01

    Malaria is a major cause of morbidity and mortality in Ivory Coast. This fact justifies further epidemiological investigations to define regional features and allow implementation of the most suitable control measures. To this end, a study focusing on transmission of malaria was conducted between January and May 1993 concurrently with malarial parasite identification in Allokoukro, a village in the humid savannah in the central region of Ivory Coast. Two vectors of malaria were found in the village, i.e. Anopheles gambiae s.l. and Anopheles funestus. These two species accounted for 53.7% of Culicides captured during the study with important monthly variations depending on rainfall. Anopheles gambiae s.l. accounted for 92.2% of the anopheles captured and thus was the main vector identified in the village. As a result of its persistence and high density, this species ensured uninterrupted transmission of malaria. Anopheles funestus was scarce and thus played a limited role in infection at the beginning of the rainy season. Plasmodium falciparum and Plasmodium malariae were the main parasite species identified in the population of the village. The incidence of malarial infection was high in children between the ages of 0 and 14 years. Plasmodium indices stood at 45.5% in March and 82.2% in May. The prevalence of malarial infection in may was associated with an increase in mean serum parasite levels in children. Clinical studies showed that malaria motivated 64.4% of consultations during the rainy season and was one of the mean causes of morbidity in particular among children. PMID:7746125

  9. Synlithification deformation processes of the Cretaceous sediments of the Ivory Coast-Ghana transform margin: A way to detail the margin history

    Microsoft Academic Search

    Caroline Huguen; Michel Guiraud; Jean Benkhelil; Jean Mascle

    2001-01-01

    The Ivory Coast-Ghana margin is a typical transform margin along which large-scale tectonism has been well documented. The Cretaceous sediments of the Ivory Coast-Ghana transform margin were subjected to numerous tectonic, gravitational, and hydrothermal forces during lithification. In this paper, we infer the order of occurrence of deformation regimes from characteristic deformations observed in samples of Ocean Drilling Program (ODP)

  10. Origins and dispersal of the mitochondrial DNA region V 9 bp deletion and insertion in Nigeria and the Ivory Coast

    SciTech Connect

    Merriwether, D.A.; Huston, S.L.; Bunker, C.A. [Univ. of Pittsburgh, PA (United States)] [and others

    1994-09-01

    An intergenic region V Mitochondrial DNA (mtDNA) 9 bp deletion located between the genes for tRNA{sup LYS} and cytochrome oxidase II was discovered in a small percentage of Nigerian and Ivory Coast natives. Previously this deletion has been described as Asian-specific and has been reported throughout the New World, Asia, S.E. Asia, and the Pacific Islands at frequencies ranging from 0% to 100%. In the New World and the Pacific Islands, the deletion is almost always accompanied by an Hae III restriction site gain at nt 16517. All 9 occurrences of the deletion observed in Africa (from four different populations) co-occur with the Hae III 16517 site gain, indicating that the African deletion probably shares a common origin with the deletion described as {open_quotes}Asian-specific{close_quotes}. The deletion was found in Benin and Sokoto, Nigeria in 2/54 Edo Bini, 1/2 Edo Ishan, 3/99 Hausa, 0/18 Fulani, and 0/16 other Nigerians. The deletion was also detected in 3/115 Ivory Coast natives from Abidjan. A 9 bp insertion (triplication) was observed in 1/115 Ivory Coast natives. The triplicated individual also possessed the Hae III 16517 site gain. The fragment containing the African deletion was sequenced and found to be identical in sequence to the Asian deletion region. D-loop sequence of nts 15975 to 00048 revealed that 2 of the 3 Ivory Coast deleted individuals and 1 of the 6 Nigerians deleted (Hausa) had a T-C transition at nt position 16189 which is common in New World-deleted individuals. These results raise the possibility that the occurrence of this deletion predates the separation of Asian and African populations from a common ancestral populations, or that the deletion has occurred more than once in human evolution. Either explanation requires that caution be exercised when using the 9 bp deletion as a population marker.

  11. Nitrogen compound emission from biomass burning in tropical African savanna FOS\\/DECAFE 1991 experiment (Lamto, Ivory Coast)

    Microsoft Academic Search

    Robert Delmas; Jean Pierre Lacaux; Jean Claude Menaut; Luc Abbadie; Xavier Roux; Gunter Helas; Jurgen Lobert

    1995-01-01

    Gaseous nitrogen compounds (NOx, NOy, NH3, N2O) were measured at ground level in smoke plumes of prescribed savanna fires in Lamto, in the southern Ivory Coast, during the FOS\\/DECAFE experiment in January 1991. During the flaming phase, the linear regression between d[NOx] and d[CO2] (differences in concentration between smoke plumes and atmosheric background) results volumic emission ratio d[NOx]\\/d[CO2]=1.37×10-3 with only

  12. The impact of human immunodeficiency virus infection on pelvic inflammatory disease: A case-control study in Abidjan, Ivory Coast

    Microsoft Academic Search

    Munkolenkole C. Kamenga; Kevin M. De Cock; Michael E. St. Louis; Coulibaly K. Touré; Sidibe Zakaria; Jean Marie N'gbichi; Peter D. Ghys; King K. Holmes; David A. Eschenbach; Helene D. Gayle; Joan K. Kreiss

    1995-01-01

    OBJECTIVE: Our purpose was to assess the impact of human immunodeficiency virus infection on pelvic inflammatory disease.STUDY DESIGN: A case-control study was performed in Abidjan, Ivory Coast, women with pelvic inflammatory disease, 57 seropositive and 113 seronegative for the human immunodeficiency virus. Women underwent an interview, physical examination, pelvic ultrasonography, and laboratory testing.RESULTS: Seropositive women more often had an oral

  13. [Ivory Coast: television outside of school for education of rural adults, a critical review].

    PubMed

    Benveniste, A

    1979-01-01

    The television education program in the Ivory Coast is part of a large national program of educational reform; the objective is to improve the efficiency of the education system, with the following principles: discover realistic methods of elite selection and staff training, as well as information and broadcasting techniques which allow the whole population to feel integrated and to take an active part in the efforts of the politicians. Education in the Ivory Coast has 4 main characteristics: low school attendance, insufficient profit, underqualified teachers and inadaptation of education to the socio-economical needs of the country. The 1st step of the installation of educational television was the official adoption of television in 1968. The 2nd step was the opening of the 1st television classes in 1971. Finally the 3d step was the extension of the television education program to the adults in 1973. This program became operational in the beginning of 1974-5. The objectives are to undertake an educational action which would allow all rural and urban people to understand the developmental actions and to participate to the improvement of their condition; to modernize and improve the standards of life for the rural population; to valorize agricultural work; to inform the population on the administrative and political structures of the country and on its goals; to make television more profitable. These objectives set the educational action in the context of the present policy of development, without establishing precisely its content. Its range is very wide as its main goal is to sensitize the population to the themes of national development and political orientations. The programs broadcasted concern agriculture, health, hygiene. The public consists of adults and young people, rural for the most part, and who have no contact with the school program. There is a contradiction in the program: it aims at a wide public and tries to obtain mass participation, while it rests on a centralized organization which was created by the government and is controlled by its agents in the framework of the school system. Educational technology hence becomes a tool in the hands of the State, to impose its own idea of development. The "peasant mass" observes a sort of passive resistance: it is not motivated by these programs which are not adapted to specific groups. The equipment is provided by France; the program also receives technical assistance from several international organizations. Modern technology is acquired at the cost of a reinforcement of economic and cultural dependence: television reaches the bush accompanied by American and French series and the western cultural values. PMID:12261383

  14. The Ivory Coast-Ghana transform margin: A marginal ridge structure deduced from seismic data

    NASA Astrophysics Data System (ADS)

    Basile, C.; Mascle, J.; Popoff, M.; Bouillin, J. P.; Mascle, G.

    1993-06-01

    The Ivory Coast-Ghana (ICG) marginal ridge is a prominent feature of the ICG transform margin and includes a fossil ridge partially buried by a thick, undeformed sedimentary cover. The fossil ICG ridge is 130 km long and 25 km wide, and towers over the adjacent rifted basin (deep Ivorian basin, DIB) and the oceanic crust by 1.3 km and more than 4 km, respectively. It formed in three successive stages. (1) During the rifting of the DIB, both vertical and horizontal motions between the DIB and the South American plate varied along the plate boundary. This relative motion occurred in an accommodation zone that tilted the northern slope of the ICG ridge along en-échelon, mainly strike-slip, faults. (2) After the rifting of the DIB, the relative motion remained constant along the transform plate boundary. At this time strike-slip deformation was localized into a narrow and highly deformed belt that truncated the accommodation zone. (3) Finally, the transform motion occurred between the DIB and an occanic plate. Thermal exchanges between the two adjacent plates induced thermal uplift of the ICG ridge that amplified previous tectonic tilting.

  15. Regulation of business activities of petroleum contractors in Cameroon, Congo, Gabon, and Ivory Coast

    SciTech Connect

    Frilet, M.; Newman, J.

    1982-03-01

    Foreign companies engaging in business in Cameroon, Congo, Gabon, and Ivory Coast are subject to a broad range of regulations. This article deals only with those aspects of the regulations that are most important to petroleum contractors intending to engage in business in these countries. The regulator scheme actually applicable in a given case will depend on the legal structure through which a corporation operates. An American corporation may envisage engaging in business on a long-term basis through a local subsidiary or branch. On the other hand, it may wish only to perform temporary activities pursuant to one or more fixed-duration contracts with petroleum companies operating in one of countries. Each of these situations is dealt with. Common features of each area of regulation were described and the differences in regulations were presented. These topics were included: exchange control regulation, corporate forms of business association, authorization to engage in business, requirement of government or local participation in capital, investment code incentives, labor law requirements, taxation of corporations, taxation of profits, taxation of income from movable capital, taxation of amounts paid abroad as technical assistance fees, royalties and similar compensation, turnover taxes, payroll taxes, taxation of business performed without forming a local company or branch, taxation of employees and Social Security contributions. (DP)

  16. Characterisation of Kaolinitic Clays from the Ivory Coast: Identification of Structural Fe

    NASA Astrophysics Data System (ADS)

    Sei, J.; Abba Touré, A.; Olivier-Fourcade, J.; Quiquampoix, H.; Staunton, S.; Jumas, J. C.; Womes, M.

    2004-09-01

    Five clays from four different deposits in the Ivory Coast (Adattié, Nieki, Grand-Bassam, Nigui-Saff) were studied by 57Fe Mössbauer spectroscopy and electron paramagnetic resonance (EPR) at room temperature. Their chemical compositions were determined by X-ray fluorescence and the most important crystalline phases were identified by X-ray diffraction. In these natural clays, kaolinite is the dominant mineral phase with minor amounts of other minerals including quartz, haematite, goethite, lepidocrocite and illite. Room-temperature 57Fe Mössbauer spectra of the samples from Nieki, Adattié and Nigui-Saff show mainly a broad quadrupole-split doublet which indicates that iron is essentially present as Fe(III). Samples from Grand-Bassam contain important amounts of goethite (?-FeOOH) and lepidocrocite (?-FeOOH). Some samples from Nigui-Saff contain large amounts of haematite. Clays from Nieki and Adattié are characterised by very low concentrations of iron oxides or hydroxides, and by small amounts of structural Fe(II) in the kaolinite lattice. Oxidation states and lattice sites of structural iron in the kaolinites were determined by 57Fe Mössbauer spectra recorded after iron extraction with dithionite-citrate-bicarbonate (DCB). The results were confirmed by electron paramagnetic resonance (EPR) measurements.

  17. Three-dimensional seismic interpretation: Espoir Field area, offshore Ivory Coast

    SciTech Connect

    Grillot, L.R.; Anderton, P.W.; Haselton, T.M.; Dermargne, J.F.

    1986-05-01

    The Espoir oil field, located approximately 13 km offshore Ivory Coast, was discovered in 1980 by a joint venture comprised of Phillips Petroleum Company, AGIP, SEDCO Energy, and PETROCI. Following the discovery, a three-dimensional seismic survey was recorded by GSI in 1981-1982 to provide detailed seismic coverage of Espoir field and adjacent features. The seismic program consisted of 7700 line-km of data acquired in a single survey area that is located on the edge of the continental shelf and extends into deep water. In comparison with previous two-dimensional seismic surveys, the three-dimensional data provided several improvements in interpretation and mapping including: (1) sharper definition of structural features, (2) reliable correlations of horizons and fault traces between closely spaced tracks, (3) detailed time contour maps from time-slice sections, and (4) improved velocity model for depth conversion. The improved mapping helped us identify additional well locations; the results of these wells compared favorably with the interpretation made prior to drilling.

  18. The Sefwi-Comoé belt Ghana/Ivory Coast : a major crustal shear zone ?

    NASA Astrophysics Data System (ADS)

    Jessell, Mark

    2010-05-01

    The Palaeoproterozoic Sefwi-Comoé region that straddles Ghana and the Ivory Coast in West Africa has been characterised as resulting from a combination of compression and simple shear during late synkinematic leucogranite intrusion. The analysis of regional geophysical datasets allows us to better define the geometry of the major lithostratigraphic packages and their structural contacts in this region. This analysis reveals a series of well defined leucogranites intrusions enveloped by high strain zones. Recent finite element modelling of two-phase aggregates has shown that we can analyse the geometry of these systems both in terms of their finite defomation and their mechanical contrast. We interpret the geometries we see in the Sefwi-Comoé region as reflecting the activity of a major crustal deformation zone which was dominated by simple shear. The comparison with the modelling suggests a finite shear strain of approximately 5 gamma, which in turn implies a lateral displacement of 400 km across the belt. Our analysis suggests that the leucogranites were already acting as more rigid bodies during the (dextral?) shearing, suggesting that their emplacement was predominantly pre-kinematic, and which has implications for their potential subsequent remobilization by gravitational forces.

  19. Impact of vertical structure on water mass circulation in a tropical lagoon (Ebrié, Ivory Coast)

    NASA Astrophysics Data System (ADS)

    Brenon, Isabelle; Audouin, Olivier; Pouvreau, Nicolas; Maurin, Jean-Christophe

    2009-09-01

    A one-dimensional vertical model has been developed to simulate the water mass circulation along the vertical structure in all deep coastal areas. The model has hydrodynamic and transport components solved using finite difference scheme. The one-dimensional vertical model results are coupled to the vertically averaged two-dimensional model results at each point of a horizontal grid. A theoretical salinity profile is introduced for each vertically integrated value obtained from the 2DH model results. A viscosity profile, simulating a viscosity value close to zero at the surface and with large viscosity gradients, is applied along the water column. The model is applied to the Vridi channel, connecting the Ebrié lagoon to the sea (Ivory Coast). The response of the Ebrié lagoon is studied in terms of inflow and outflow of water in the system through the Vridi channel. Due to the abrupt variation of the surface slope, vertical velocities along the water column show an anticlockwise spiral from bottom to surface during a tidal cycle. Due to the bottom friction and to the vertical viscosity profile, velocities decrease from surface to bottom. However, the freshwater inflow slows down the tidal propagation during the flood and causes the surface velocity to be smaller than the bottom velocity at mid-tide. Close to the bottom, velocities follow an anticlockwise movement due to the tidal propagation. At the water surface, velocities follow only an alternative movement of either ebb or flood, along the channel direction. No cross shore velocities can develop at the surface in the channel.

  20. A Cuban tektite

    USGS Publications Warehouse

    Garlick, G.D.; Naeser, C.W.; O'Neil, J.R.

    1971-01-01

    A large tektite from Cuba is classified with other North American tektites on the basis of its age. The major-element chemistry, oxygen isotopic composition, refractive index and density of the Cuban tektite are within the ranges exhibited by bediasites. ?? 1971.

  1. Sex, fertility and menstruation among the Beng of the Ivory Coast: a symbolic analysis.

    PubMed

    Gottlieb, A

    1982-01-01

    An attempt is made in this discussion to relocate the topic of menstruation in a new framework, one not directly defined by gender and not restricted to the view that menstrual blood and menstrual pollution are by definition viewed negatively. The Beng (Ivory Coast) notions of menstruation are explored as they relate to wider concepts of pollution and fertility. The analysis demonstrates how menstrual pollution among the Beng forms part of another type of pollution--the spatio symbolic pollution of human fertility when it is removed from its proper place--and how, rather than debasing women, menstruation serves to have added value to a major aspect of women's labor--that of cooking. There are 3 rules which Beng observe concerning menstruation: no initiated, married, or previously married woman who is menstruating may set foot in the forest for any reason other than to defecate; a menstruating woman may not touch a corpse; and a man may not eat food cooked by his wife during the days she is menstruating, nor may a Master of the Earth eat food cooked by any menstruating woman. At first, these taboos appear to be another case of the pollution of women through menstruation and another instance of women's oppression. When explored, the Master of Earth explained that menstrual blood is considered as special because it carries in it a living being and that menstrual blood is like the flower which must emerge before the fruit--the baby--can be born. No answer was provided to the question of pollution. There seemed to be no other rules specifying what activities a woman should or should not pursue during menstruation. She is not isolated from the flux of social life, and sexual activiity during menstruation, though not commonly done, is not taboo. The fact that it is only working in the forest, and not other activities, that is prohibited to menstruating women reveals that menstruation is not regarded as dangerous to men or as polluting in general. Rather, menstrual blood is seen as a symbol of human fertility, and for this reason is not allowed to touch the forest/fields, which are viewed as a form of Earth fertility. Forest/field fertility and village fertility must be conceptually kept apart, according to the Beng view of the world. Similarly, Beng husbands may not eat food cooked by their menstruating wives for a related reason. Menstruating women who cook are handling crops produced in the forest/fields, and their husbands, with whom they produce (village) children, must therefore avoid contact with such food, lest the 2 realms of village and forest fertility be mixed. Food cooked by menstruating women is agreed by all Beng to be the most delicious of all Beng food, thus giving positive value to an activity of menstruating women. PMID:12264952

  2. Sensitivity and Specificity of Human Immunodeficiency Virus Rapid Serologic Assays and Testing Algorithms in an Antenatal Clinic in Abidjan, Ivory Coast

    Microsoft Academic Search

    STEPHANIA KOBLAVI-DEME; CHANTAL MAURICE; DANIEL YAVO; TOUSSAINT S. SIBAILLY; YVONNE KAMELAN-TANO; STEFAN Z. WIKTOR; THIERRY H. ROELS; TERENCE CHORBA; JOHN N. NKENGASONG

    2001-01-01

    To evaluate serologic testing algorithms for human immunodeficiency virus (HIV) based on a combination of rapid assays among persons with HIV-1 (non-B subtypes) infection, HIV-2 infection, and HIV-1-HIV-2 dual infections in Abidjan, Ivory Coast, a total of 1,216 sera with known HIV serologic status were used to evaluate the sensitivity and specificity of four rapid assays: Determine HIV-1\\/2, Capillus HIV-1\\/HIV-2,

  3. Biomass burning in the tropical savannas of Ivory Coast: An overview of the field experiment Fire of Savannas (FOS\\/DECAFE 91)

    Microsoft Academic Search

    J. P. Lacaux; J. M. Brustet; R. Delmas; J. C. Menaut; L. Abbadie; B. Bonsang; H. Cachier; J. Baudet; M. O. Andreae; G. Helas

    1995-01-01

    FOS\\/DECAFE 91 (Fire of Savannas\\/Dynamique et Chimie Atmosphérique en Forêt Equatoriale) was the first multidisciplinary experiment organized in Africa to determine gas and aerosol emissions by prescribed savanna fires. The humid savanna of Lamto in Ivory Coast was chosen for its ecological characteristics representative of savannas with a high biomass density (˜900 g m-2 dry matter). Moreover the vegetation and

  4. The tektite problem

    NASA Technical Reports Server (NTRS)

    Okeefe, J. A.

    1978-01-01

    Small glassy pebbles, called tektites, are found in widely scattered locations around the world. These tektites appear much like volcanic glass obsidian, but their chemical composition is different from that of any terrestrial lava and they contain far less water and none of obsidian's characteristic microcrystals. No one has ever found the mother lode of a field of tektites. They cannot, therefore, be the product of terrestrial volcanism. Recently acquired knowledge about the moon's surface confirms earlier indications that tektites cannot be bits of lunar soil propelled to the earth by the impact of meteorites on the moon. According to one of two remaining possibilities tektites are bits of terrestrial sedimentary rock excavated by meteorites striking the earth's surface, melted by the heat of impact, and congealed into glass as they travel above the atmosphere to the scattered sites where they are found. The other possibility is that tektites are the remains of gobs of lava fired at the earth by volcanic activity on the moon.

  5. Seasonal variability of carbon dioxide and methane in the rivers and lagoons of Ivory Coast (West Africa)

    NASA Astrophysics Data System (ADS)

    Koné, Y. J. M.; Abril, G.; Delille, B.; Borges, A. V.

    2009-04-01

    We report a data-set of carbon dioxide (CO2) and dissolved methane (CH4) in three rivers (Bia, Tanoé and Comoé) and five lagoons (Tendo, Aby, Ebrié, Potou and Grand-Lahou) of Ivory Coast (West Africa), during the four main climatic seasons (high dry season, high rainy season, low dry season and low rainy season). The surface waters of the three rivers were oversaturated in CO2 and CH4 with respect to atmospheric equilibrium, the seasonal variability of CO2 and CH4 seemed to be largely controlled by dilution during the flooding period. The strong correlation of CH4 concentrations with the partial pressure of CO2 (pCO2) confirm the dominance of a continental sources (from soils) for both CO2 and CH4 in these rivers. The largest CH4 over-saturations and diffusive air-water CH4 fluxes were observed in the Tendo and Aby lagoons that are permanently stratified systems (unlike the other 3 lagoons), leading to anoxic bottom waters favorable for a large CH4 production. In addition, these two stratified lagoons showed low pCO2 values due to high primary production, which suggests an efficient transfer of organic matter across the pycnocline. As a result, the stratified Tendo and Aby lagoons were respectively, a low source of CO2 to the atmosphere and a sink of atmospheric CO2 while the other 3 well-mixed lagoons were strong sources of CO2 to the atmosphere but lower sources of CH4 to the atmosphere.

  6. Synlithification deformation processes of the Cretaceous sediments of the Ivory Coast-Ghana transform margin: A way to detail the margin history

    NASA Astrophysics Data System (ADS)

    Huguen, Caroline; Guiraud, Michel; Benkhelil, Jean; Mascle, Jean

    2001-12-01

    The Ivory Coast-Ghana margin is a typical transform margin along which large-scale tectonism has been well documented. The Cretaceous sediments of the Ivory Coast-Ghana transform margin were subjected to numerous tectonic, gravitational, and hydrothermal forces during lithification. In this paper, we infer the order of occurrence of deformation regimes from characteristic deformations observed in samples of Ocean Drilling Program (ODP) Leg 159. Three main types of minor scale deformation are identified and characterized in terms of geometry, rheology, and kinematics: (1) extensional structures such as normal faults and irregular veins with angular, indented walls that are widely recorded at all ODP sites; (2) compressional structures that are confined to the marginal ridge of the Ivory Coast-Ghana transform margin and include reverse faults, folds, and vertical crenulation cleavage and (3) various types of shear zone at low angles with respect to bedding, which are continuous throughout the Cretaceous succession of the ridge. Structural analysis combined with thin section observation shows that most of these deformations occurred in water-rich sediments. The extensional, minor-scale structures are related to the Early Cretaceous rifting stage of the margin as characterized at regional scale by half-grabens and tilted blocks. The compressional structures observed in the samples are attributed to Turonian-Santonian positive inversion tectonics and related to the occurrence of large-scale flower structures and inverted extensional blocks. In contrast, the shear zones at low angles with respect to bedding observed throughout the Cretaceous series are linked to local gravity-induced tectonics.

  7. Real-time PCR assay for discrimination of Plasmodium ovale curtisi and Plasmodium ovale wallikeri in the Ivory Coast and in the Comoros Islands

    PubMed Central

    2012-01-01

    Background Plasmodium ovale is one of the five malaria species infecting humans. Recent data have shown that the name of this neglected species masks two distinct genotypes also called curtisi and wallikeri. Some authors show that these species could be sympatric. These two subspecies are not differentiated by microscopy techniques and malaria rapid diagnostic tests. This diagnostic defect is the result of low parasitaemia, antigenic polymorphism and absence of antibodies performance and requires the use of sequencing techniques. An accurate and easy discrimination detection method is necessary. Methods A new molecular assay was developed to easily identify the two genotypes of P. ovale. This tool allowed the study of 90 blood samples containing P. ovale, confirmed by molecular biology techniques, which were obtained from patients with imported malaria. Results The new marker was validated on well genotyped samples. The genotype of 90 P. ovale samples mainly imported from the Ivory Coast and the Comoros Islands was easily and quickly realized. The distribution of the two subspecies was described with a significant number of samples and showed that the two genotypes were present in the studied countries. Conclusion This work confirms the presence of the two species in the same country for the first time, in the Ivory Coast and the Comoros Islands. A better genotyping of P. ovale types may improve a better characterization of the clinical pathophysiology for each. PMID:22947418

  8. Groundwater Pathways In Fractured Heterogeneous Granitic Aquifers - A Hydrochemistry Survey In The Sassandra Watershed (Inland Ivory Coast

    NASA Astrophysics Data System (ADS)

    Yao, T.; Fouche, O.

    2008-12-01

    Hydrogeochemical data and Landsat images are used to characterize the groundwater flow in a complex fractured granitic aquifer system located at the South-West of Ivory Coast (West Africa). The specific processing of the Landsat ETM+ images allows producing a detailed map of faults having length more than 3 km. The map is integrated with other data sources into a geographical information system (GIS) in order to identify areas favourable to groundwater sampling in fractured rock. The results of statistical analyses, as applied to hydrochemical data set clearly indicate that the groundwater of the study region is principally of Ca-Mg-HCO3 and Na-K-HCO3 types. The Ca-HCO3 type waters occur in areas of recharge (generally topographically higher area) i.e. where recharge occurs relatively fast. These waters generally have lower pH and EC values. The recharge occurs through preferential pathways such as alongside dykes and sills and the various fracture and joint patterns that transect the study area. The Na- HCO3 and Na-SO4 type waters occur in discharging and static regimes (the lower lying areas) where evaporation and cation exchange are the dominant processes. Ground waters are mostly oxidizing in character, and clearly unsaturated with respect to calcite, reflecting the small amount of carbonate in the aquifer. A few samples are reducing, with low NO3 and high dissolved Fe2+ and Mn2+ concentration and occur in the valley area. These reducing waters are thought to have experienced a deeper circulation and longer residence time in which reducing reactions have proceeded, with groundwater discharge along the valleys bottom. The chemistry of major ions, here applied to fractured aquifers, turns to be a powerful tool when carefully compared with a map of fault traces. We obtain a sufficient knowledge of the aquifer heterogeneity prior to realize a zoning of the region, based on cells with homogeneous hydrodynamic behaviour in which local permeability ellipses are computed. Thus, we characterize the geographical variability of the permeability anisotropy in this segment of the Sassandra watershed.

  9. Palaeoclimatic and deforestation effect on the coastal fresh groundwater resources of SE Ivory Coast from isotopic and chemical evidence

    NASA Astrophysics Data System (ADS)

    Adiaffi, Bernard; Marlin, Christelle; Oga, Yéï Marie Solange; Massault, Marc; Noret, Aurelie; Biemi, Jean

    2009-05-01

    SummaryIn the South-east of the Ivory Coast, two aquifer systems have been studied in the sedimentary deposits at the South and in the fractured bedrock at the North of the study area (5-6°N, 2.40-4.40°W) : (1) the Continental Terminal (CT) and (2) the Paleoproterozoïc Bedrock (PB). In the studied area, the vegetation cover has undergone significant changes since 1955 in addition to climate change. Rainforests have gradually disappeared due to natural and anthropological deforestation. The impact of deforestation on groundwater of the PB and on the CT has been studied by a geochemical approach. Stable isotopes ( 18O, 2H and 13C) contents, radiocarbon ( 14C) contents and chemical data (major ions) have been measured on a set of 25 groundwater samples. The residence time of the groundwaters is estimated with the 14C using two models: (i) the model of well-mixed reservoir (WMR model) and (ii) the piston flow model (PF model). The range of the PB groundwater residence time (15,200-8300 to ˜300-100 a BP) for both models shows that the recharge has started at the beginning of the post-glacial period whereas the CT aquifer recharge is much more recent (from 300 a BP to today). The PB groundwater provides information about paleoclimatic conditions that occurred over the studied area during the late Pleistocene. The low contents indicate cold and/or more humid conditions of recharge. During that period, the low content of 13C is consistent with a vegetation cover dominated by rainforest (C 3 plants). After the 20th century, the progressive evolution of vegetation cover from forest to cultivated plants and grasses is shown by the enrichment of groundwater in 13C (C 3 plants to C 4 plants). The relatively high mineralization level (mean of 143.7 mg L -1) and high ?18O- ?2H values of modern PB groundwater reflect of a recharge process that is slowed by a thick layer (16.3-72.5 m) of weathered formations above the PB formations. Groundwaters of the CT aquifer are constantly supplied by the fast infiltration of rainfall towards the water-table, explaining their very low total dissolved solids (TDS) of 20.1 mg L -1, their high 14C activities and their non-evaporated characteristics.

  10. Dyula intellectualism in the Ivory Coast and Ghana : a study of the life and career of Al-H?a?jj S?a?lih? b. Muh?ammad b. Uthma?n 

    E-print Network

    Muhammad, Akbar

    1974-01-01

    are the establishment of the Gyaman Abron kingdom in northern Ivory Coast, the founding of a Dyula imamate and trading community within its frontiers, the impact of the Samorian and French subjugation of the territory, the intellectual activity of the Dyula...

  11. [Private companies: an opportunity for hepatitis B virus (HBV) prevention and care in Ivory Coast in the wake of HIV/AIDS?

    PubMed

    Bekelynck, A

    2014-11-18

    In the 1990s, defenders of "aids exceptionnalism" have promised that the inequities caused by HIV/AIDS could provide leverage in the care of other health issues later. Fifteen years later, this argument can be rethought at the light of the current context of hepatitis B virus (HBV) in Ivory Coast. In fact, in this country, the challenges caused by HBVecho those of HIV/AIDS fifteen years ago: high prevalence (8-10%), ignorance of the disease, and high cost of care. To this end, this article compares the role of private companies in the fights against HIV/AIDS in the 2000s and its role in the fight against HBV today. Although some private firms played a critical role in the promotion of universal access to ART, today, they are one of the few places where HBV screening, vaccination and treatment are offered in the country. HIV/AIDS opened the door for private companies to address other diseases through their health care systems. However, many challenges still need to be met: the absence of qualitative ongoing training for health professionals, illness representations and the costs of treatments, which are all related to the lack of international and national collective action. In Ivory Coast, at the early stage of the HIV/AIDS epidemic, national authorities took up the leadership in the fight against AIDS in West Africa, by developing extraverted strategies (Xth ICASA's organization, Unaids initiative hosting). The exceptional international mobilization and the creation of innovative funding mechanisms [International Therapeutic Solidarity Fund (ITSF), Global Fund (GM), and President's Emergency Plan for AIDS Relief (PEPFAR)] have facilitated easy access to ARV. Although 380 million people are infected by chronic HBV in the world, even so, international and national collective actions are fledgling and remained weak. Moreover, private firms have represented leverage for testing, treatment, and the provision of universal access to medication in the context of the HIV/AIDS epidemic in Ivory Coast, as relayed by other public and private actors. In the HBV context, private companies can only be a vector for the development of a two tier healthcare system. Therefore, the lack of a strong international commitment prevents public and private local initiatives to generalize HBV prevention and treatment. PMID:25407333

  12. Palaeoproterozoic high-pressure granulite overprint of the Archaean continental crust: evidence for homogeneous crustal thickening (Man Rise, Ivory Coast)

    NASA Astrophysics Data System (ADS)

    Pitra, Pavel; Kouamelan, Alain N.; Ballèvre, Michel; Peucat, Jean-Jacques

    2010-05-01

    The character of mountain building processes in the Palaeoproterozoic times is subject to much debate. The local observation of Barrovian-type assemblages and high-pressure granulite relics in the Man Rise (Côte d'Ivoire), led some authors to argue that Eburnean (Palaeoproterozoic) reworking of the Archaean basement was achieved by modern-style thrust-dominated tectonics (e.g., Feybesse & Milési, 1994). However, it has been suggested that crustal thickening and subsequent exhumation of high-pressure crustal rocks can be achieved by virtue of homogeneous, fold-dominated deformation of hot crustal domains even in Phanerozoic orogenic belts (e.g., Schulmann et al., 2002; 2008). We describe a mafic granulite of the Kouibli area (Archaean part of the Man Rise, western Ivory Coast) that displays a primary assemblage (M1) containing garnet, diopsidic clinopyroxene, red-brown pargasitic amphibole, plagioclase (andesine), rutile, ilmenite and quartz. This assemblage is associated with a subvertical regional foliation. Symplectites that develop at the expense of the M1 assemblage contain orthopyroxene, clinopyroxene, plagioclase (bytownite), green pargasitic amphibole, ilmenite and magnetite (M2). Multiequilibrium thermobarometric calculations and P-T pseudosections calculated with THERMOCALC suggest granulite-facies conditions of ca. 13 kbar, 850°C and <7 kbar, 700-800°C for M1 and M2, respectively. In agreement with the qualitative information obtained from reaction textures and chemical zoning of minerals, this suggests an evolution dominated by decompression accompanied by moderate cooling. A Sm-Nd garnet - whole-rock age of 2.03 Ga determined on this sample indicates that this evolution occurred during the Palaeoproterozoic. We argue that from the geodynamic point of view the observed features are best explained by homogeneous thickening of the margin of the Archaean craton, re-heated and softened due to the accretion of hot, juvenile Palaeoproterozoic crust, as well as coeval intrusion of juvenile magmas. Crustal shortening was mainly accommodated by transpressive shear zones and by lateral crustal spreading rather than large-scale thrust systems. The occurrence of high-pressure granulites does not imply thrust-dominated tectonics. Feybesse, J.-L. & Milési, J.-P., 1994. The Archean/Proterozoic contact zone in West Africa: a mountain belt of décollement thrusting and folding on a continental margin related to 2.1 Ga convergence of Archean cratons? Precambrian Research, 69, 199-227. Schulmann, K., Schaltegger, U., Ježek, J., et al. 2002. Rapid burial and exhumation during orogeny: thickening and synconvergent exhumation of thermally weakened and thinned crust (Variscan orogen in Western Europe). American Journal of Science, 302, 856-879. Schulmann, K., Lexa, O., Štípská, P. et al., 2008. Vertical extrusion and horizontal channel flow of orogenic lower crust: key exhumation mechanisms in large hot orogens? Journal of Metamorphic Geology, 26(2), 273-297.

  13. The role of savannas in the terrestrial Si cycle: A case-study from Lamto, Ivory Coast

    NASA Astrophysics Data System (ADS)

    Alexandre, A. E.; Abbadie, L.

    2011-12-01

    Savannas currently occupy a fifth of the earth's land surface and are predicted to expand in the next few centuries at the expense of tropical forests, mainly as a result of deforestation and human fires. Can such a vegetation trend impact, through changes in plant Si cycling, the lithogenic silicon (LSi) release into soils (through chemical weathering) and the net dissolved Si (DSi) outputs from soils to stream water (through chemical denudation)? The first step of an investigation requires quantifying the net Si fluxes involved in the plant/soil system. Here, a schematic steady-state Si cycle, established for a tropical humid savanna (Lamto, Ivory Coast) that developed on a ferruginous soil and is subjected to annual fires, is presented. Erosion was assumed to be insignificant. LSi and biogenic Si (BSi under the form of phytoliths) pools were measured, and Si fluxes were estimated from Si concentrations and mass balance calculation. Identification of plant and soil phytoliths indicated that the soil BSi pool is in equilibrium with the current BSi input by the savanna. In the soil column, mixing between a young rapidly recycled BSi pool and an old stable BSi pool is attested by a mixing line equation. Storage of the old BSi pool is assimilated as a BSi output from the plant/soil system. A BSi output additionally occurs after annual fires, when ashes are exported. Both BSi outputs decrease as much the BSi dissolution. In order to uptake constant DSi flux, the savanna increases by three to eight times the net LSi release, depending upon the post-fire ash exportation scenario. A comparison between savanna and rainforest Si cycles that maximizes the differences in plant/soil systems and minimizes differences in climate is presented. The comparison revealed that BSi storage is higher in the savanna soil than in the rainforest soil, mainly due to BSi production that is twice higher in the savanna (127 vs 67 kg/ha/yr). The resulting LSi release that is enhanced by plant uptake is more than 1.5 higher in the savanna than in the rainforest (from 33 to 85 kg/ha/yr in the savanna vs 21 kg/ha/yr in the rainforest). On the contrary, DSi output from soils to stream water, which is not controlled by plant Si cycling but more likely by the soil hydrological regime (or meteoric weathering), is close to twice as high in the rainforest/ferrallitic soil ecosystem (16 vs 9 kg/ha/yr). This case study suggests that the predicted expansion of savannas at the expense of forests should significantly increase DSi uptake by plants, BSi storage in soils, BSi output with ash exportation, and, hence, LSi release through chemical weathering, without direct impact on DSi outputs from soils to stream water. Tracks for further assessing the role of plant Si cycling on chemical weathering, Si and C cycles were suggested: 1) estimates of BSi fluxes that were wrongly based on the assumption that the amount of DSi leached out from soils is linked to the magnitude of plant Si cycling and/or to BSi concentration in soils should be reappraised and 2) changes in the magnitude of plant Si cycling should be accounted in geochemical carbon cycle models, for one of the plant-induced weathering mechanisms.

  14. The role of savannas in the terrestrial Si cycle: A case-study from Lamto, Ivory Coast

    NASA Astrophysics Data System (ADS)

    Alexandre, Anne; Bouvet, Mickael; Abbadie, Luc

    2011-08-01

    Savannas currently occupy a fifth of the earth's land surface and are predicted to expand in the next few centuries at the expense of tropical forests, mainly as a result of deforestation and human fires. Can such a vegetation trend impact, through changes in plant Si cycling, the lithogenic silicon (LSi) release into soils (through chemical weathering) and the net dissolved Si (DSi) outputs from soils to stream water (through chemical denudation)? The first step of an investigation requires quantifying the net Si fluxes involved in the plant/soil system. Here, a schematic steady-state Si cycle, established for a tropical humid savanna (Lamto, Ivory Coast) that developed on a ferruginous soil and is subjected to annual fires, is presented. Erosion was assumed to be insignificant. LSi and biogenic Si (BSi under the form of phytoliths) pools were measured, and Si fluxes were estimated from Si concentrations and mass balance calculation. Identification of plant and soil phytoliths indicated that the soil BSi pool is in equilibrium with the current BSi input by the savanna. In the soil column, mixing between a young rapidly recycled BSi pool and an old stable BSi pool is attested by a mixing line equation. Storage of the old BSi pool is assimilated as a BSi output from the plant/soil system. A BSi output additionally occurs after annual fires, when ashes are exported. Both BSi outputs decrease as much the BSi dissolution. In order to uptake constant DSi flux, the savanna increases by three to eight times the net LSi release, depending upon the post-fire ash exportation scenario. A comparison between savanna and rainforest Si cycles that maximizes the differences in plant/soil systems and minimizes differences in climate is presented. The comparison revealed that BSi storage is higher in the savanna soil than in the rainforest soil, mainly due to BSi production that is twice higher in the savanna (127 vs 67 kg/ha/yr). The resulting LSi release that is enhanced by plant uptake is more than 1.5 higher in the savanna than in the rainforest (from 33 to 85 kg/ha/yr in the savanna vs 21 kg/ha/yr in the rainforest). On the contrary, DSi output from soils to stream water, which is not controlled by plant Si cycling but more likely by the soil hydrological regime (or meteoric weathering), is close to twice as high in the rainforest/ferrallitic soil ecosystem (16 vs 9 kg/ha/yr). This case study suggests that the predicted expansion of savannas at the expense of forests should significantly increase DSi uptake by plants, BSi storage in soils, BSi output with ash exportation, and, hence, LSi release through chemical weathering, without direct impact on DSi outputs from soils to stream water. Tracks for further assessing the role of plant Si cycling on chemical weathering, Si and C cycles were suggested: 1) estimates of BSi fluxes that were wrongly based on the assumption that the amount of DSi leached out from soils is linked to the magnitude of plant Si cycling and/or to BSi concentration in soils should be reappraised and 2) changes in the magnitude of plant Si cycling should be accounted in geochemical carbon cycle models, for one of the plant-induced weathering mechanisms.

  15. Australasian tektites: source parameters and crater location reviewed

    NASA Astrophysics Data System (ADS)

    Stecher, O.; Storey, M.; Hopper, J. R.

    2009-12-01

    Tektites of the Australasian strewn field cover an area from SE-Asia, through the Southwestern part of the Pacific Ocean and parts of the Indian Ocean, down to Australia. The impact crater has until now not been positively located, but it is generally assumed to be located somewhere in Indochina, where tektites also are more abundant and larger. 40Ar/39Ar dated Australasian tektites consistently give ages around 800 ka (1,2), and our new laser step-heating determinations on a Thailand tektite are in agreement. Australasian tektites show a marked coherence in physical, chemical and isotopic parameters. Refractive indices of tektite fragments, numbers of vesicles, abundance of relict minerals, tektite mass/m2, major elements compositions from tektites covering the whole strewn field can be contoured with more or less elliptical curves with slightly varying center positions, located within a few 100 km of the Cambodia, Laos, Vietnam junction. Isotope data suggest that sediments of the impact area consisted of ~1500 Ma old denudation material (Nd-isotope data (3,4)) and that this material was eroded within the last 170 Ma (Sr-isotope data (3,4)). Fine-grained minerals and particularly soils are effective scavengers of cosmogenic 10Be, and the high values reported for Australasian tektites (5) suggest that clay minerals are a significant and variable component in the target material. The highest 10Be-values are from tektites found furthest from the impact site. In the impact process, the top layer of the target - with its young sedimentation ages and higher 10Be values - will be projected the furthest away from the impact site. The next layer down consists of slightly older material with lower 10Be, and the impact process will propel these tektites to areas closer to the impact site. The 10Be distribution in tektites shows this variation and defines a broad center (~17°N, ~107°E) off the coast of Vietnam (5). La-ICPMS Pb/Pb-isotope data from tektites show small progressive variations from Australia over Java to Thailand, and when these data are compared to determined Pb/Pb-isotope data from sediments from the Pearl River (S. China) and the Mekong River (S.Vietnam)(6) the data project towards the Mekong River suggesting that the crater could be found nearer to the Mekong River delta. Schnetzler et al. (7) using early Seasat/Geos3 satellite data first reported the possibility of a large crater off the coast of Vietnam (~13.8°N, ~110.6 °E). We have examined satellite bathymetry and gravity data for a large section of off-shore Vietnam, and we located a near circular feature at essentially the same position. The structure has a diameter of approximately 100 km, with a center at (~13.6°N, ~111.2 °E), and a peak rises more than 500 m above the crater floor. We concur with Schnetzler et al. (7) that this structure is most likely the impact site for Australasian tektites. (1) Yamei et al., Science 287, p1622 (2000) (2) Lo et al., MAPS, 37, p1555 (2002)) (3) Blum et al., GCA 56, p483 (1992) (4) Shaw and Wasserburg, EPSL 60, p155 (1982) (5) Ma et al., GCA 68, p3883 (2004) (6) Millot et al., Chem Geol, 203, p75 (2004) (7) Schnetzler et al., GRL 15, p357 (1988)

  16. Ivory Snowmen

    ERIC Educational Resources Information Center

    Mueller, Ann

    2005-01-01

    Recalling memories from her own third grade art classes, Ann Mueller, recreated an updated version for her students showing her students how to make snow scenes from Ivory Snow flakes. She showed students the video, The Snowman based on Raymond Briggs's book of the same name. Its beautiful images spur the imagination, and the musical score is…

  17. Assessment of Mycotoxin Exposure in Côte d’ivoire (Ivory Coast) Through Multi-Biomarker Analysis and Possible Correlation with Food Consumption Patterns

    PubMed Central

    Kouadio, James Halbin; Lattanzio, Veronica M. T.; Ouattara, Djeneba; Kouakou, Brou; Visconti, Angelo

    2014-01-01

    Scope: The aim of the presented study was to investigate the mycotoxin exposure of Ivorian population related to the consumption patterns of maize, peanuts, millet, and cassava product (attiéké). Materials and Methods: Maize flour samples (n = 51) were purchased from all Abidjan local markets, in the south of Ivory Coast, and urine (n = 99) was collected during the same reference period (July–September 2011) from volunteers living in Abidjan and Daloa cities. Reversed-phase liquid chromatography coupled with electrospray ionization triple quadrupole mass spectrometry (LC-ESI-MS/MS) was used to analyze aflatoxins (AFB1, AFB2, AFG1, and AFG2), ochratoxin A (OTA), fumonisins (FB1, FB2), deoxynivalenol (DON), zearalenone (ZEA), and T-2 and HT-2 toxins in maize flour samples, and their relevant biomarkers (AFM1, DON, DON + de-epoxydeoxynivalenol (DOM-1), FB1, ?-zearalenol (ZOL), ?-ZOL, and OTA) in urine samples. Results: Critical maize contamination was observed by AFs occurrence (total AFs 4.5 – 330.0 ?g/kg) while OTA was found in 13% of samples analyzed. AFM1 was detected in 40% of urines samples (0.06 – 14.11 ng/ml), OTA in 37% (0.01 – 0.42 ng/ml), FB1 in 27% (0.07 to 15.31 ng/ml) and, DON was found in 21% of samples at levels up to 10.0 ng/ml. The correlation coefficients (R2) obtained by plotting the percentage of biomarker occurrence (positive samples) versus the frequency of food consumption revealed maize, peanuts, millet and attiéké were strongly linked to AFB1 and OTA exposure with values of R2 ranged from 0.462 to 0.956. Conclusion: The present study provided data on mycotoxin risk in Ivory Coast, revealing a frequent co-exposure to the major mycotoxins such as AFs, OTA, and fumonisins, which appeared to be related to the frequency of peanuts, maize, millet and attiéké consumption. PMID:25948962

  18. [Microfilarial loads of onchocerca and experimental vectorial capacity of Simulium soubrense-Simulium sanctipauli group in the forest zone of Ivory Coast].

    PubMed

    Traore, S; Diarrassouba, S; Riviere, F

    1996-01-01

    Mass treatment programs using ivermectin are now beginning in forest areas and simuli will soon be feeding on individuals with low microfilarial loads (probably < 10). Most previous reports have involved higher mean loads (range: 14-6950. The purpose of this study was to ascertain the impact of low microfilarial loads on the number of infecting larvae present at the end of a parasite cycle in the Simulium soubrense-Simulium sanctipauli group and on availability for transmission to man by inoculation. Tests were carried out on five subjects from a forest area of southwest Ivory Coast who were infected with onchocerciasis and presented mean microfilarial loads of 1, 5, 10, 20, and 100. Findings showed a direct correlation between microfilarial load (1, 5, 20, and 100) and intake of microfilaria per dissected female. Similarly there was a correlation between microfilarial loads (1, 5, 10, 20, and 100), quantity of infected females, and number of infecting larvae per infected female. Parasite output was variable but decreased as microfilarial load increased. This study suggests that the experimental vectorial capacity of simuli is similar in subjects presenting onchocerciasis with high and low microfilarial loads. PMID:9139196

  19. Emissions and concentrations of hydrogen sulfide in the air of the tropical forest of the Ivory Coast and of temperate regions in France

    SciTech Connect

    Delmas, R.; Baudet, J.; Servant, J.; Baziard, Y.

    1980-08-20

    Atmospheric H/sub 2/S was measured by a fluorometric method (sensitivity 10 ng). In France, for aerated soils the emissions were between 0.8 and 27 ..mu..g m/sup -2/ h/sup -1/ H/sub 2/S (average 5 ..mu..g m/sup -2/ h/sup -1/). The soil temperature is an important factor governing this emission. The H/sub 2/S concentrations in the air ranged from 0.017 to 0.17 ..mu..g m/sup -3/ (average 0.080 ..mu..g m/sup -3/). In the Ivory Coast the H/sub 2/S emissions were estimated between 30 and 300 ..mu..g m/sup -2/ h/sup -1/. The measured concentrations of H/sub 2/S in the air at ground level ranged from 0.10 to 8.7 ..mu..g m/sup -3/. The relative importance of the measured emissions for anoxic soils of the humid equatorial forests in the global S cycle is discussed.

  20. Sex and age differences in the diet and ingestive behaviors of sooty mangabeys (Cercocebus atys) in the Tai Forest, Ivory Coast.

    PubMed

    McGraw, W Scott; Vick, Anna E; Daegling, David J

    2011-01-01

    Members of the Cercocebus-Mandrillus clade are united by several morphological features, including expanded premolars which are argued to be associated with a preponderance of hard objects in the diet. We test the association between premolar expansion and hard object feeding by examining how different dental regions are used during food processing. We examined the diet and oral processing activities of sooty mangabeys (Cercocebus atys) in the Ivory Coast's Tai forest from August 2008 to September 2009. In addition to compiling diet profiles, we recorded the frequency that individuals performed four activities: 1) incising, 2) canine puncturing/scraping, 3) postcanine crushing (i.e., isometric biting), and 4) routine mastication (chewing cycles). Sooty mangabeys have a relatively narrow diet that consists largely of nuts/seeds, fruits, and invertebrates. While there are age and sex differences in diet, the most frequently consumed foods are similar across age and sex classes. The most frequently consumed foods are seeds of Sacoglottis gabonensis which are the hardest items in the sooty mangabey diet. Patterns of ingestive behavior vary with food type, but adults and nonadults (excluding infants dependent on mothers) of both sexes process similar foods. Premolar expansion in Cercocebus atys is associated with powerful crushing of hard objects of specific size and durophagy is a constant feature of sooty mangabey feeding ecology throughout ontogeny. PMID:20925080

  1. Correspondence Synthetic ivory fails

    E-print Network

    Cai, Long

    Correspondence Synthetic ivory fails to stop illegal trade Synthetic ivory can now be crafted to the same diagnostic standards as genuine ivory (see M. E. Sims et al. Ethnobiol. Lett. 2, 40­44; 2011), and its price in China is only about 14% of that of real ivory. First manufactured in 1865 to save

  2. The New Central American Tektite Strewn Field

    NASA Astrophysics Data System (ADS)

    Povenmire, H.; Harris, R. S.; Cornec, J. H.

    2011-03-01

    Recently there have been more than 40 tektites found in western Belize. This apparently represents part of a new tektite strewn field. The Pantasma crater in Nicaragua is about 14 km diameter and is currently being investigated as the possible source crater.

  3. Sr\\/Rb AGE STUDY OF TEKTITES

    Microsoft Academic Search

    W. H. Jr. Pinson; L. F. Herzog; H. W. Fairbairn; R. F. Cormier

    1958-01-01

    Eight tektite samples from four localities, Australia, Indo-China, the ; Philippines, and the Moldau Valley were analyzed for Rb and Sr, and Sr isotopic ; composition analyses were made on seven of the samples. Seven of the eight ; samples are so similar in Rb\\/Sr ratios that a common source origin is postalated ; for the tektites. No radiogenic Sr⁸⁷

  4. Sr \\/ Rb age study of tektites

    Microsoft Academic Search

    W. H. Pinson Jr.; L. F. Herzog; H. W. Faierairn; R. F. Cormier

    1958-01-01

    Eight tektite samples from four localities, Australia, Indo-China, the Philippines, and the Moldau Valley were analysed for Rb and Sr, and Sr isotopic composition analyses were made on seven of the samples. Seven of the eight samples are so similar in Rb \\/ Sr ratios that a common source origin is postulated for the tektites. No radiogenic Sr 87 was

  5. Submicroscopic spherules and color of tektites

    USGS Publications Warehouse

    Thorpe, A.N.; Senftle, F.E.

    1964-01-01

    Magnetic susceptibility measurements of 18 tektites from various strewn fields have been made as a function of temperature from 77??K to room temperature. A relatively large temperature-independent component of the magnetic susceptibility was observed in all cases, and an analysis of the data shows that this component is the result of submicroscopic iron spherules in the tektites. An analysis of the color of tektites in terms of the magnetic measurements and also of the optical absorption spectra suggests that the basic color of all tektites is green or greenish-blue, and that the brown to black coloration in some tektites is due to finely dispersed Fe2O3 and/or many metallic spherules, both probably of colloidal size. ?? 1964.

  6. Fe-57 Moessbauer study of tektites

    NASA Technical Reports Server (NTRS)

    Evans, B. J.; Leung, L. K.

    1976-01-01

    Moessbauer measurements were made on selected moldavite, australite, philippinite, and Georgia tektites. The spectra consist of two apparent lines, but at least two quadrupole doublets can be fitted to these spectra. The Moessbauer parameters for these doublets indicate that they arise from Fe2+ ions with local environments, which are relatively rich and relatively poor in calcium, respectively, similar to those in clinopyroxenes. No evidence for Fe3+/Fe2+ ratios above 0.01 (estimated detection limit) have been found in any tektite. Tektites are considerably more reduced than previously believed, and the extent of the reduction shows little or no variation among different types of tektites. These results limit the source materials of tektites to minerals in which the iron is uniformly highly reduced and in which the iron is contained clinopyroxene-like phases.

  7. Noble Gas Compositions in Muong Nong-type Tektites

    Microsoft Academic Search

    K. Matsubara; J. Matsuda; C. Koeberl

    1993-01-01

    Tektites are natural silica-rich glasses and are thought to be produced during meteorite collisions with the Earth, similar to impact glasses. They occur in four geographically restricted areas and can be divided in three subgroups: normal or splash-form tektites, aerodynamically shaped tektites, and Muong Nong-type tektites [1]. Splash-form and aerodynamically shaped tektites are several grams in weight and are generally

  8. An Ordinary Chondrite Impactor Composition for the Bosumtwi Impact Structure, Ghana, West Africa: Discussion of Siderophile Element Contents and Os and Cr Isotope Data

    NASA Technical Reports Server (NTRS)

    Koeberl, Christian; Shukolyukov, Alex; Lugmair, Guenter

    2004-01-01

    Osmium isotope data had shown that Ivory Coast tektites contain an extraterrestrial component, but do not allow distinction between chondritic and iron meteorite contamination. PGE abundances of Ivory Coast tektites and impactites and target rocks from the Bosumtwi crater, the source crater of the Ivory Coast tektites, were all relatively high and did not allow to resolve the presence, or identify the nature, of the meteoritic component. However, Cr isotope analyses of an Ivory Coast tektite yielded a distinct 53Cr excess of 0.30+/-0.06, which indicates that the Bosumtwi impactor was an ordinary chondrite.

  9. Isotopic fractionation of Cu in tektites

    NASA Astrophysics Data System (ADS)

    Moynier, Frederic; Koeberl, Christian; Beck, Pierre; Jourdan, Fred; Telouk, Philippe

    2010-01-01

    Tektites are terrestrial natural glasses of up to a few centimeters in size that were produced during hypervelocity impacts on the Earth's surface. It is well established that the chemical and isotopic composition of tektites is generally identical to that of the upper terrestrial continental crust. Tektites typically have very low water content, which has generally been explained by volatilization at high temperature; however, the exact mechanism is still debated. Because volatilization can fractionate isotopes, comparing the isotopic composition of volatile elements in tektites with those of their source rocks may help to understand the physical conditions during tektite formation. Interestingly, volatile chalcophile elements (e.g., Cd and Zn) seem to be the only elements for which isotopic fractionation is known so far in tektites. Here, we extend this study to Cu, another volatile chalcophile element. We have measured the Cu isotopic composition for 20 tektite samples from the four known different strewn fields. All of the tektites (except the Muong Nong-types) are enriched in the heavy isotopes of Cu (1.98 < ? 65Cu < 6.99) in comparison to the terrestrial crust (? 65Cu ? 0) with no clear distinction between the different groups. The Muong Nong-type tektites and a Libyan Desert Glass sample are not fractionated (? 65Cu ? 0) in comparison to the terrestrial crust. To refine the Cu isotopic composition of the terrestrial crust, we also present data for three geological reference materials (? 65Cu ? 0). An increase of ? 65Cu with decreasing Cu abundance probably reflects that the isotopic fractionation occurred by evaporation during heating. A simple Rayleigh distillation cannot explain the Cu isotopic data and we suggest that the isotopic fractionation is governed by a diffusion-limited regime. Copper is isotopically more fractionated than the more volatile element Zn (? 66/64Zn up to 2.49‰). This difference of behavior between Cu and Zn is predicted in a diffusion-limited regime, where the magnitude of the isotopic fractionation is regulated by the competition between the evaporative flux and the diffusive flux at the diffusion boundary layer. Due to the difference of ionic charge in silicates (Zn 2+ vs. Cu +), Cu has a diffusion coefficient that is larger than that of Zn by at least two orders of magnitude. Therefore, the larger isotopic fractionation in Cu than in Zn in tektites is due to the significant difference in their respective chemical diffusivity.

  10. Age of the Australasian Tektite Strewn Field

    NASA Astrophysics Data System (ADS)

    Izokh, E. P.

    1993-07-01

    As Fig. 1 shows, the widespread belief that the age of the Australasian tektite strewn field (AATSF) is ~0.7 m.y. appeared to be conventional. Tektites of different fission-track ages were found within the AATSF: 0.83 m.y. [1], 3.54-4.25 m.y. [2], and ~11 m.y. [3]. The first systematic investigation of the tektites, which were collected from a single stratigraphic layer in Vietnam, revealed three statistically discrete tektite age groups: 0.4, 0.6, and 0.8 m.y. [4]. Similar tektites 0.75 m.y. and 1.1 m.y. in age are typical of the Zhamanshin impact crater, which represents an eminent part of the AATSF [5]. Fig. 1, which appears here in the hard copy, shows radiogenic dating: 1-2: AATSF; 3-4: Zhamanshin; 1,3: data with known annealing correction. Compiled after Zahringer, 1963; Fleischer and Price, 1964; Gentner et al., 1969; McDougal and Lovering, 1969; Fleischer et al., 1969; Storzer and Wagner, 1979, 1980; Watanabe et al., 1985; Virk, 1985; Shukolukov et al., 1986; Kashkarov et al, 1986, 1987; Kolesnikov et al., 1987; Storzer and Muller-Sonhius, 1986; Arakelyants et al., 1988; etc. The very young geological age of the AATSF was established in Australia, and was confirmed by the author in Vietnam and in the Zhamanshin impact crater. This well-known tektite age paradox strongly supports an extraterrestrial origin of tektites. The paradox is fatal to the currently dominating Earth- impact theory of tektite origin, and we are not surprised that there are no continued attempts to either silence or disavow its significance. As a matter of fact, the formation of the gigantic AATSF can be considered as the main reason for the abrupt catastrophic climatic global changes and mass extinction of species on the Pleistocene/Holocene boundary 10,000 years ago [5,6]. The age-paradox scope dictates that tektites have been periodically formed and accumulated somewhere on an as-yet-unknown planetary body and then delivered to the Earth. The extraterrestrial volcanic eruptions seem to be the most appropriate process of the tektite formation and launching [7]. The frequent shift of the K-Ar ages relative to the fission-track ages of tektites can be explained by the presence of an extra argon inherited from some older crystalline inclusions foreign to the tektite glass. These inclusions are most common to the Muong Nong-type layered tektites and to flanges of the button-shape australites, and can be considered as an extraterrestrial environmental dust peppering. References: [1] Storzer and Wagner (1980) Meteoritics, 15, 372. [2] Fleischer et al. (1969) EPSL, 7, 51-52. [3] Storzer and Muller-Sonhius (1986) Meteoritics, 21, 518-519. [4] Kashkarov et al. (1986) Meteoritika, 45, 105-170. [5] Izokh (1991) Soviet Geol. and Geophys., 32, 1-10. [6] Tollman and Tollmann (1992) Mitt. Osterr. Geol. Ges., 84. [7] Izokh and Le duc An (1983) Meteoritika, 42, 158-169.

  11. Mechanism of Muong Nong-type tektite formation and speculation on the source of Australasian tektites

    NASA Technical Reports Server (NTRS)

    Schnetzler, C. C.

    1992-01-01

    The source crater of the youngest and largest of the tektite strewnfields, the Australasian strewnfield, has not been located. A number of lines of evidence indicate that the Muong Nong-type tektites, primarily found in Indochina, are more primitive than the much more abundant and widespread splash-form tektites, and are proximal to the source. In this study the spatial distribution of Muong Nong-type tektite sites and chemical character have been used to indicate the approximate location of the source. The variation of Muong Nong-type tektite chemical composition appears to be caused by mixing of two silicate rock end-members and a small amount of limestone, and not by vapor fractionation. The variation in composition is not random, and does not support in situ melting or multiple impact theories. The distribution of both Muong Nong and splash-form tektite sites suggest the source is in a limited area near the southern part of the Thailand-Laos border.

  12. The underworld of ivory

    Microsoft Academic Search

    R. T. Naylor

    2005-01-01

    This paper examines the emergence and operation of the illegal market for ivory, paying particular attention to the institutional structure and criminogenic characteristics of the industry. It notes that many of the problems associated with modern regulation have deep historical roots. While much anti-animal trade rhetoric emphasizes the alleged participation of “organized crime” in the clandestine traffic, the reality is

  13. Exploration of tektite formation processes through water and metal content measurements

    NASA Astrophysics Data System (ADS)

    Watt, Nigel; Bouchet, Romain A.; Lee, Cin-Ty A.

    2011-07-01

    Impact events are a significant surface-modifying process on solar system objects lacking frequent resurfacing by atmospheric or igneous processes. To better explore the effects of impacts on surface materials, we measured the water and trace element compositions of tektites from Da Lat, Vietnam. Fourier transform infrared spectroscopy was used for water measurements and laser ablation inductively coupled plasma mass spectrometry was used for trace element measurements. Consistent with previous investigations of tektites, we found that the samples are depleted in volatile metals (e.g., Zn, Pb) as well as in water compared with the average continental crust, although water contents are still extremely high for rocks melted at atmospheric pressure. While Zn and Pb concentrations are linearly correlated with each other, there is no correlation between H2O and Zn or Pb contents. Combined with water contents of other tektites in the Australasian strewn field, our results demonstrate that the source impact occurred at a wet site in or off the coast of the Indochina peninsula.

  14. Structure of ivory.

    PubMed

    Locke, Michael

    2008-04-01

    Profiles with all orientations have been used to visualize the 3D structure of ivory from tusks of elephant, mammoth, walrus, hippopotamus, pig (bush, boar, and warthog), sperm whale, killer whale, and narwhal. Polished, forming, fractured, aged, and stained surfaces were prepared for microscopy using epi-illumination. Tusks have a minor peripheral component, the cementum, a soft derivative of the enamel layer, and a main core of dentine=ivory. The dentine is composed of a matrix of particles 5-20 microm in diameter in a ground substance containing dentinal tubules about 5 microm in diameter with a center to center spacing of 10-20 microm. Dentinal tubules may be straight (most) or curly (pigs). The main findings relate to the way that dentinal tubules align in sheets to form microlaminae in the length of the tusk. Microlaminae are sheets of laterally aligned dentinal tubules. They are axial but may be radial (most), angled to the forming face (pigs and hippopotamus canines), or radial but helical (narwhals). Within the microlaminae the dentinal tubules may be radial, angled to the axis (whales, walrus, and pigs), or may change their orientation from one microlamina to the next in helicoids (canines of hippopotamuses, incisors of proboscidea). In the nonbanded, featureless ivories from the hippopotamus incisors, the dentinal tubules form radial microlamina from which the arrangements in other ivories can be derived. In the canines of hippopotamuses and incisors of proboscidea, the dentinal tubule orientation changes incrementally from one microlamina to the next in a helicoid, a stack of dentinal tubules that change their orientation by 180 degrees anticlockwise. Dentinal tubules having different orientations are laid down concurrently, not layer by layer as in most examples of helicoidal architecture (e.g., insect cuticle). In proboscidean ivory, the microlaminae are radial, normal to the banding of growth layers marking the plane of deposition. They form radial segments with each 180 degrees turn in the orientation of their constituent dentinal tubules. Below the cementum they are almost complete 180 degrees helicoids, but nearer to the core they become narrower with the loss of radially oriented dentinal tubules. These truncated helicoidal patterns appear in longitudinal profile as VVVV feather patterns rather than intersection intersection intersection intersection, each V or intersection being the side view of a partial or complete helicoid. The Schreger pattern in proboscidean ivory consists of these helicoids divided tangentially into columns in the length of the tusk. Narwhals have the most abundant matrix particles with their radial/helical dentinal tubules having a twist opposite to that in the cementum. PMID:18157860

  15. Origin of tektites: an alternative to terrestrial impact theory.

    PubMed

    Izokh, E P

    1996-01-01

    The Terrestrial Impact Theory (TIT) has won a complete victory over O'Keefe's lunar volcanic theory, but only because the Moon appears to be the wrong place for tektites. Indeed, the TIT ignores strong evidence of their volcanic origin--far from the Moon. The Extraterrestrial Volcanic Comet Theory proposes an alternative to both of these theories. Major arguments for an extraterrestrial tektite source are paradoxical: a great time difference between tektite formation and their arrival on Earth, and also forms, plastic deformations, ice collision marks, vacuum voids, etc. indicating specific conditions of tektite formation such as low gravitational field, lack of atmosphere, interaction of hot plastic tektites with ice, etc. Major evidence of volcanic origin includes: close analogy between shaped tektites and small volcanic bombs, and between layered tektites and lava or tuff-lava flows or huge bombs; analogy between flanged tektites and volcanic bombs ablated by gasjets: long-time, multistage formation of some tektites that corresponds to wide variations in their radiometric ages; well-ordered long compositional trends (series) typical of magmatic differentiation; different compositional tektite families (subseries) comparable to different stages (phases) of the volcanic process. Thus, different types of volcanic eruptions under extraterrestrial conditions could be reconstructed based on tektite properties. It is presumed that tektites were transported to the Earth by specific eruptive comets, i.e. in the form of ice-tektite agglomerates launched into space by volcanic explosion. Major arguments favouring comets include: ice collision marks and imprints as mentioned above; linear band-like sculpture of the Australasian strewn field as evidence of comet fragmentation and slope or skipping trajectory of separate fragments; compact coincidence of the Zhamanshin impact crater with small tektite strewn field as evidence of steep trajectory of separate comet fragments that disintegrated while entering the atmosphere. The comet-Earth collision under consideration happened 10,000 years ago and caused the global catastrophe marked by the sharp Pleistocene-Holocene boundary, i.e. by abrupt climatic changes, the end of glaciation, mass extinction, etc. This event can be compared with the "dinosaur" catastrophe at the K/T boundary 65 Ma, which was also accompanied by tektite fall. PMID:11541098

  16. Ivory and simulated ivory artefacts: Fourier transform Raman diagnostic study

    NASA Astrophysics Data System (ADS)

    Edwards, H. G. M.; Farwell, D. W.

    1995-11-01

    The Fourier transform Raman spectrum of ivory is reported and assignments are proposed for the major spectroscopic features. Application of the FT Raman technique to the non-destructive diagnostic identification of ivory and simulated ivory artefacts is illustrated with reference to several specimens, both modern and aged. Although the FT Raman spectrum of ivory is similar to that of other bone samples, the characteristic vibrational modes are identified and it is suggested that the relative intensity ratio of the ?(CH) stretching bands near 2930 cm -1 and the hydroxyapatite ?(PO) stretching band at 960 cm -1 is a good diagnostic parameter for ivory. Other modes, such as ?(NH) near 3300 cm -1, the ?(CH 2) profile near 1250 cm -1 and ?(CC) symmetric ring stretching intensity at 1002 cm -1 are also good confirming indicators to distinguish ivory from bone and synthetic specimens. Modern specimens of "ivory" using synthetic polymers and polymer-inorganic composites are easily distinguished spectroscopically from genuine ivory, particularly close textural specimens, which involved a synthetic blending of poly(methylmethacrylate), polystyrene and calcite.

  17. A 10.8-kg layered (Muong-Nong-type) tektite from Wenchang, Hainan, China

    NASA Technical Reports Server (NTRS)

    Futrell, Darryl S.; Wasson, John T.

    1993-01-01

    A 10.79-kg layered tektite from Hainan is the largest tektite from China, and the fifth largest reported to date. It, together with a 1.9-kg Hainan tektite described by Yuan (1981), greatly extends the area of the Australasian field within which layered tektites having masses greater than 1 kg have been found.

  18. Field recovery of layered tektites in northeast Thailand

    SciTech Connect

    Wasson, J.T. [Univ. of California, Los Angeles, CA (United States)] [Univ. of California, Los Angeles, CA (United States); Pitakpaivan, K.; Putthapiban, P. [Department of Mineral Resources, Bangkok (Taiwan, Province of China)] [and others] [Department of Mineral Resources, Bangkok (Taiwan, Province of China); and others

    1995-07-25

    The authors recovered Australasian tektites in place throughout a 40 X 130 km region in northeast Thailand extending from the Laotian border westward to a line connecting Na Pho Klang in the northeast through Det Udom to Nam Yun in the south. With two exceptions, in sites near the western edge of this region, all fragments are layered (muong-Nong-type) tektites. It appears that large layered tektites are mainly found by rice farmers in fields that were forested until the recent past. The presence of layered tektites in this 40 X 130 km area implies that impact melt that fell in these areas was hot enough to flow if it was deposited on a sloping surface. The absence of splash-form tektites from the region indicates that the layer was still molten when masses having shapes (teardrops, dumbbells, etc.) produced by spinning reached the ground. To account for this and to allow time for the melt to flow a few tens of centimeters requires that the atmosphere remained hot (>2300 K) for a few minutes. Tektites that are in place are almost always associated with a widespread 10-cm to meter-thick layer of laterite. In two cases (one involving layered, one involving splash-form tektites), where accurate stratigraphic control demonstrated that the tektites were still in section, they were sited on top of the laterite layer just below a layer of aeolian sand. 27 refs., 1 fig., 1 tab.

  19. A New Tektite Discovery in the Guangdong Province, China, and the Search for the Source Crater of the Australasian Tektite Strewn Field

    NASA Astrophysics Data System (ADS)

    Kenkmann, T.; Maier, R. V.; Sturm, S.; Zhu, Meng-Hua.

    2014-09-01

    A new tektite location in South China is presented that belongs to the Australasian tektite strewnfield. We also investigated a 30 km circular structure in the Guangdong and Guangxi Province that might be related to the Australasian impact event.

  20. The problem of the origin of tektites from Zhamanshin astrobleme

    NASA Astrophysics Data System (ADS)

    Takhauov, Artur; Anoshin, Dmitriy; Plotnikova, Irina

    2013-04-01

    Tektites (from Greek. Tektós - molten, melted) - are natural glassy formations of yellow, green, but mostly black color, completely fused, that may have different shape and size. According to their composition tektites are high-silicon (acidic) glasses. The content of SiO may reach 88,5%, AlO - 20,5%, FeO - 11,5%, and CaO - 8,5%. The presence of Ni and relatively low content of water in comparison with other glasses (only 0.02%, which is 10 times less than in the volcanic glass) is of particular importance. The name to tektites was given by Austrian geologist E. Suess (1900). Tektites are often denominated according to their location: irgizites and zhamanshinites (river Irgiz and Zhamanshin hole in Kazakhstan), moldavites [river Moldava (modern Vltava, Czech Republic)] filippinites (Philippines), idoshinites (Indo-china), avstralites (Australia), etc. There is still no generally accepted hypothesis about the origin of tektites: some consider them to be a part of meteorites, others suggest that tektites are the result of the explosion and melting of terrestrial matter that happens when meteorites, asteroids or comets fall down on Earth. The aim of the present work is to conduct analytic studies of tektites from Zhamanshin crater. We examined 50 samples that are part of the collection from the Zhamanshin crater gathered in 1979 by I.N. Plotnikova during her student field expedition led by P.V. Florenskiy. For the convenience of the research of tektites during its early stages the authors compiled a morphological classification of the given samples. On the basis of the visual inspection by the help of a magnifying glass we distinguished the following groups of tektites, which are characterized by certain morphological features: 1. Porous (cavernous), black, isometric shape 2. Porous (cavernous), yellowish-brown, isometric shape 3. Elongated, torose 4. Elongated, with glassy luster 5. Elongated, twisted 6. worm-shaped 7. Vitreous, glassy 8. Deformated The vast majority of researchers believe that the surface of tektites reflects the dynamic resistance of the medium (air) that they were experiencing in their movement. Visual examination of the samples confirms that, and looking at the most tektites, it is difficult not to agree with this idea. Consequently, we can make an assumption that the morphology of tektites depends on the conditions of the genesis (in particular, on the distance and the expansion velocity of tektites). Aubrey Whymark, a famous contemporary specialist in tektites, also believes that the morphology is associated with the range of expansion of tektites from an impact crater, which, according to his theory, are formed as a result of impact metamorphism. This opinion is shared by many scientists involved in the research of tektites. In the next phase of the research the samples of all the morphological groups were examined using electron microscopy. During this analysis, we have found non-melted areas of the rock in 3 out of 50 samples (these were the rocks of the 2nd and the 7th groups from our classification). We also detected the features of the surface patterns that testify the impact formation of tektites.

  1. Diminished tektite ablation in the wake of a swarm

    NASA Technical Reports Server (NTRS)

    Sepri, P.; Chen, K. K.; Okeefe, J. A.

    1981-01-01

    Observations of ablation markings on tektite surfaces reveal that a large variation in aerodynamic heating must have occurred among the members of a swarm during atmospheric entry. In a few cases, the existence of jagged features indicates that these tektite surfaces may have barely reached the melting temperature. Such an observation seems to be incompatible with the necessarily large heating rates suffered by other tektites which exhibit the ring wave melt flow. A reconciliation is proposed in the form of a wake shielding model which is a natural consequence of swarm entry. Calculations indicate that the observed ablation variations are actually possible for swarm entry at greater than escape velocity. This aerodynamic conclusion provides support for the arguments favoring extraterrestrial origin of tektites.

  2. Optical magnetic, and electrical properties of tektites, meteorites, and other space related materials

    NASA Technical Reports Server (NTRS)

    1974-01-01

    The scope of the project is reported to study the infrared absorption of water and the magnetic properties of the iron in tektites. Subsequently, the work was expanded to include the other properties of tektites and lunar materials. When the lunar samples became available, the emphasis of the research shifted from tektites to lunar samples.

  3. COSMIC RAY EXPOSURE AGES OF TEKTITES BY THE FISSION-TRACK TECHNIQUE

    Microsoft Academic Search

    R. L. Fleischer; C. W. Naeser; P. B. Price; R. M. Walker; M. Maurette

    1965-01-01

    Tektites exposed to primary cosmic radiation will contain distinctive, readily identifiable, induced-fission tracks, a large fraction of which will survive the heating which occurs as tektites fall to earth. A search for such events in samples from each of the four chronological tektite groups failed to reveal such events and thereby indicates an average cosmic ray exposure age of less

  4. Magnetic susceptibility of tektites and some other glasses

    USGS Publications Warehouse

    Senftle, F.E.; Thorpe, A.

    1959-01-01

    The magnetic susceptibility at several magnetic field strengths of about thirty tektites from various localities have been measured. The susceptibility ranges from 2 ?? 10-6 to about 7.9 ?? 10-6 e.m.u./g. Tektites from a given locality have similar susceptibilities. The intensity of magnetization of all the tektites measured is zero or very small. For comparison, the same measurements have been made on about thirty obsidians. The magnetic susceptibilities cover approximately the same range, but the intensity of magnetization of the impurity was found to be much higher. By heating the obsidians to 1450??C the intensity of magnetization was reduced to zero. From the above data, it is shown that the tektites must have been heated well above 1400??C, and that essentially all the iron is in solution. On the other hand, the evidence shows that obsidians have not been heated much above this temperature, and that there is a significant amount of undissolved iron in the glass, probably as magnetite. Further, if tektites are extraterrestrial, they probably entered the earth's atmosphere as a glass. ?? 1959.

  5. Beryllium-10 in Australasian tektites - Evidence for a sedimentary precursor

    NASA Technical Reports Server (NTRS)

    Pal, D. K.; Moniot, R. K.; Kruse, T. H.; Herzog, G. F.; Tuniz, C.

    1982-01-01

    Each of seven Australasian tektites contains about 100 micron atoms of beryllium-10 (half-life, 1.53 million years) per gram. Cosmic-ray bombardment of the australites cannot have produced the measured amounts of beryllium-10 either at the earth's surface or in space. The beryllium-10 contents of these australites are consistent with a sedimentary precursor that adsorbed from precipitation beryllium-10 produced in the atmosphere. The sediments must have spent several thousand years at the earth's surface within a few million years of the tektite-producing event.

  6. Iron Redox Variations in Australasian Muong Nong-Type Tektites

    NASA Astrophysics Data System (ADS)

    Giuli, G.; Cicconi, M. R.; Trapananti, A.; Eeckhout, S. G.; Pratesi, G.; Paris, E.; Koeberl, C.

    2013-08-01

    The Fe oxidation state along few profile across dark/light layers of two Australasian Muong Nong tektite sample have been studied by Fe K-edge XANES. The dark layer results to be slightly but reproducibly more oxidized respect to the light layers.

  7. Iron Redox Variations in Australasian Muong Nong-Type Tektites

    NASA Astrophysics Data System (ADS)

    Giuli, G.; Cicconi, M. R.; Trapananti, A.; Eeckhout, S. G.; Pratesi, G.; Paris, E.; Koeberl, C.

    2013-09-01

    The Fe oxidation state along profiles across dark and light layers of two Australasian Muong Nong tektite samples have been studied by Fe K-edge XANES. The dark layer results to be slightly but reproducibly more oxidized respect to the light layers.

  8. Soret diffusion: A possible cause of compositional heterogeneity within tektites

    NASA Technical Reports Server (NTRS)

    Delano, J. W.; Liu, Y.-G.; Schmitt, R. A.

    1993-01-01

    Although a terrestrial origin for tektites is well-established on geochemical evidence, the physical processes involved in tektite formation have been largely ignored by geochemists and petrologists. For example, two observations that potentially bear on the physics of their origin are the following: (1) The flange of an australite is often more heterogeneous than its core; and (2) microtektites are compositionally more diverse than tektites. The first observation contradicts the traditional view of flange formation since a second heating to super-liquidus temperatures during atmospheric re-entry should, by chemical diffusion and mixing, have tended to homogenize the melt as it flowed off the leading edge of the core to form the flange. Analyses of an australite flange have been performed by electron microprobe. The results of those analyses emphasize the magnitude of the heterogeneity, as well as the well-defined elemental correlations that may constrain the process responsible for it. The second observation that the bulk compositions of microtektites are more divers than the tektites within the same strewnfield is a well-known characteristic, for which no quantitative explanation has been offered. The current investigation has involved the analysis of 43 Australasian microtektites from the Wharton Basin by electron microprobe, as well as trace-element abundances on fifteen of these microtecktites by INAA.

  9. Contributed Paper Combating the Illegal Trade in African Elephant Ivory

    E-print Network

    Wasser, Samuel

    Contributed Paper Combating the Illegal Trade in African Elephant Ivory with DNA Forensics SAMUEL K ivory, 1 string seized in Singapore and Malawi and the other in Hong Kong and Cameroon. These ivory traffickers may comprise 2 of the largest poaching rings in Africa. In both cases all ivory seized

  10. Vector diagram of the chemical compositions of tektites and earth lavas

    NASA Technical Reports Server (NTRS)

    Kvasha, L. G.; Gorshkov, G. S.

    1978-01-01

    The chemical compositions of tektites and various volcanic glasses, similar in composition to tektites are compared by a petrochemical method. The advantage of the method is that a large number of chemical analyses of igneous rocks can be graphically compared with the help of vectors, plotted in relation to six parameters. These parameters, calculated from ratios of the main oxides given by silicate analysis, reflect the chief characteristics of igneous rock. Material for the study was suppled by data from chemical analysis characterizing tektites of all known locations and data from chemical analyses of obsidians similar in chemical composition to tektites of various petrographical provinces.

  11. Fluorine and boron geochemistry of tektites, impact glasses, and target rocks

    NASA Astrophysics Data System (ADS)

    Matthies, D.; Koeberl, C.

    1991-03-01

    Fluorine and boron were analyzed in nine tektites from all four strewn fields, and in a suite of impact glasses and target rocks from the Zhamanshin and Darwin impact craters, as well as Libyan Desert Glass and Aouelloul impact glass samples. Tektites from different strewn fields show a limited range of F and B contents and have F/B ratios near unity. Most splash-form tektites have lower average F and B contents than Muong Nong type tektites, which is similar to the relation between irghizites and zhamanshinites. The F and B contents in target rocks from the Zhamanshin and Darwin impact craters are similar to normal terrestrial sediments. Fluorine in impact glasses and tektites is more depleted compared to their (known or inferred) target rocks than is boron, which is caused by the higher volatility of F. The F/B ratios therefore decrease with increasing temperature of formation (suggesting that irghizites were formed at a higher temperature than zhamanshinites, and Muong Nong type tektites at a lower temperature than splash-form tektites). Mixing of local country rocks together with partial loss of the volatiles F and B can reproduce the F and B contents of impact glasses.

  12. IVORY'S THEOREM IN HYPERBOLIC SPACES H. STACHEL AND J. WALLNER

    E-print Network

    Wallner, Johannes

    IVORY'S THEOREM IN HYPERBOLIC SPACES H. STACHEL AND J. WALLNER Abstract. According to the planar version of Ivory's Theorem the family of confocal conics has the property that in each quadrangle formed to hyperbolic and other spaces. 1. Introduction The planar Euclidean version of Ivory's Theorem states

  13. Study of the ablative effects on tektites. [wake shielding during atmospheric entry

    NASA Technical Reports Server (NTRS)

    Sepri, P.; Chen, K. K.

    1976-01-01

    Equations are presented which provide approximate parameters describing surface heating and tektite deceleration during atmosphere passage. Numerical estimates of these parameters using typical initial and ambient conditions support the conclusion that the commonly assumed trajectories would not have produced some of the observed surface markings. It is suggested that tektites did not enter the atmosphere singly but rather in a swarm dense enough to afford wake shielding according to a shock envelope model which is proposed. A further aerodynamic mechanism is described which is compatible with hemispherical pits occurring on tektite surfaces.

  14. Dissecting the illegal ivory trade: an analysis of ivory seizures data.

    PubMed

    Underwood, Fiona M; Burn, Robert W; Milliken, Tom

    2013-01-01

    Reliable evidence of trends in the illegal ivory trade is important for informing decision making for elephants but it is difficult to obtain due to the covert nature of the trade. The Elephant Trade Information System, a global database of reported seizures of illegal ivory, holds the only extensive information on illicit trade available. However inherent biases in seizure data make it difficult to infer trends; countries differ in their ability to make and report seizures and these differences cannot be directly measured. We developed a new modelling framework to provide quantitative evidence on trends in the illegal ivory trade from seizures data. The framework used Bayesian hierarchical latent variable models to reduce bias in seizures data by identifying proxy variables that describe the variability in seizure and reporting rates between countries and over time. Models produced bias-adjusted smoothed estimates of relative trends in illegal ivory activity for raw and worked ivory in three weight classes. Activity is represented by two indicators describing the number of illegal ivory transactions--Transactions Index--and the total weight of illegal ivory transactions--Weights Index--at global, regional or national levels. Globally, activity was found to be rapidly increasing and at its highest level for 16 years, more than doubling from 2007 to 2011 and tripling from 1998 to 2011. Over 70% of the Transactions Index is from shipments of worked ivory weighing less than 10 kg and the rapid increase since 2007 is mainly due to increased consumption in China. Over 70% of the Weights Index is from shipments of raw ivory weighing at least 100 kg mainly moving from Central and East Africa to Southeast and East Asia. The results tie together recent findings on trends in poaching rates, declining populations and consumption and provide detailed evidence to inform international decision making on elephants. PMID:24250744

  15. New approach to the origin of the tektite in China

    NASA Technical Reports Server (NTRS)

    Qin-Wen, Zhang; Dao-Yi, XU; Zheng, Yan

    1988-01-01

    The tektites in China are distributed on the north part of Australia - Southeastern Asia strewfield of tektite: Leizhou Peninsula of Guangdong Province and Hainan Island, and located exactly at the boundary between Zanjiang Formation and Beihai Formation. A new hypothesis is suggested: During the end of Lower Pleistocene, a comet of special components from the outer part of the Solar System approached the Earth, and then it was captured by the Earth, when it came approximately to the Roche's limet. It was crushed into countless fragments, detritus and dusts, which rotated around the Earth, probably far above the Earth's atmosphere, as a cloud ring. Under the action of crushing energy they could be in the situation of liquid-melt drop in the almost vacuum circumstances and the flow and bubble structure were formed. During their rotation the climate became anomalous and the violet Fe-Si concentration were formed on the surface of sediments. After a rather short time of rotation the unstable ring was broken and the fragments impacted on the hard ground instantaneously.

  16. The ivory trade ban: Is it effective?

    Microsoft Academic Search

    Jyoti Khanna; Jon Harford

    1996-01-01

    This paper examines the effectiveness of the ivory trade ban when producer and consumer states have different incentives to comply with such a ban. The paper distinguishes between two types of producer states: those with stable elephant population and those with declining elephant population. We compare the independent enforcement level of each of these producer states and a consumer state

  17. Aerodynamic Analysis of Tektites and Their Parent Bodies

    NASA Technical Reports Server (NTRS)

    Adams, E. W.; Huffaker, R. M.

    1962-01-01

    Experiment and analysis indicate that the button-type australites were derived from glassy spheres which entered or re-entered the atmosphere as cold solid bodies; in case of average-size specimens, the entry direction was nearly horizontal and the entry speed between 6.5 and 11.2 km/sec. Terrestrial origin of such spheres is impossible because of extremely high deceleration rates at low altitudes. The limited extension of the strewn fields rules out extraterrestrial origin of clusters of such spheres because of stability considerations for clusters in space. However, tektites may have been released as liquid droplets from glassy parent bodies ablating in the atmosphere of the earth. The australites then have skipped together with the parent body in order to re-enter as cold spheres. Terrestrial origin of a parent body would require an extremely violent natural event. Ablation analysis shows that fusion of opaque siliceous stone into glass by aerodynamic heating is impossible.

  18. Cote D'Ivoire (Ivory Coast): World Oil Report 1991

    SciTech Connect

    Not Available

    1991-08-01

    This paper reports on the country's limited oil reserves which are almost exhausted meaning difficult times in the future. New terms for an offer of 11 offshore blocks allow for a negotiable split of cost oil and profit oil linked to either daily production or the ratio between accumulated net revenues and accumulated revenue.

  19. A recent history of forest fragmentation in southwestern Ivory Coast

    Microsoft Academic Search

    Cyrille Chatelain; Laurent Gautier; Rodolphe Spichiger

    1996-01-01

    This study provides monitoring and spatial analysis of forest fragmentation based on high-resolution remote sensing, in order to give a framework for assessing residual biodiversity in the Guiglo-Taï region. Massive deforestation has taken place, mainly in the last 20 years, 79% of unprotected forests have been eliminated on the 100 × 100 km study area. Deforestation is also beginning to

  20. Exploration of Tektite Formation Processes through Water and Metal Content Measurements

    NASA Astrophysics Data System (ADS)

    Watt, Nigel John DeWolfe McKinley, II

    Impact events are a significant surface-modifying process on bodies lacking frequent resurfacing by atmospheric or igneous processes. To explore the effects of impacts on surface materials, we measured water and trace element compositions of tektites from Vietnam. Fourier transform infrared spectroscopy was used for water measurements and laser ablation inductively coupled plasma mass spectrometry was used for trace element measurements. Consistent with previous investigations of tektites, we found that the samples are depleted in volatile metals (e.g., Zn, Pb) as well as in water compared to the average continental crust, though water contents are high for rocks melted at atmospheric pressure. While Zn and Pb concentrations are linearly correlated with each other, there is no correlation between H2O and Zn or Pb contents. Combined with water contents of other tektites in the Australasian strewnfield, our results demonstrate that the source impact occurred at a wet site near the Indochina peninsula.

  1. 40Ar/39Ar age of Cretaceous-Tertiary boundary tektites from Haiti

    USGS Publications Warehouse

    Izett, G.A.; Dalrymple, G.B.; Snee, L.W.

    1991-01-01

    40Ar/39Ar dating of tektites discovered recently in Cretaceous-Tertiary (K-T) boundary marine sedimentary rocks on Haiti indicates that the K-T boundary and impact event are coeval at 64.5 ?? 0.1 million years ago. Sanidine from a bentonite that lies directly above the K-T boundary in continental, coal-bearing, sedimentary rocks of Montana was also dated and has a 40Ar/39Ar age of 64.6 ?? 0.2 million years ago, which is indistinguishable statistically from the age of the tektites.

  2. Geographic variation of stable isotopes in African elephant ivory

    NASA Astrophysics Data System (ADS)

    Ziegler, S.; Merker, S.; Jacob, D.

    2012-04-01

    In 1989, the international community listed the African elephant in Appendix I of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) thus prohibiting commercial ivory trade. Recent surveillance data show that the illegal trade in ivory has been growing worldwide. Long-term preservation of many of the African elephant populations can be supported with a control mechanism that helps with the implementation of remedial conservation action. Therefore, setting up a reference database that predicts the origin of ivory specimens can assist in determining smuggling routes and the provenance of illegal ivory. Our research builds on earlier work to seek an appropriate method for determining the area of origin for individual tusks. Several researchers have shown that the provenance of elephant ivory can be traced by its isotopic composition, but this is the first attempt to produce an integrated isotopic reference database of elephant ivory provenance. We applied a combination of various routine geochemical analyses to measure the stable isotope ratios of hydrogen, carbon, nitrogen, oxygen, and sulphur. Up to now, we analysed 606 ivory samples of known geographical origin from African range states, museums and private collections, comprising 22 African elephant range states. The isotopic measurements were superimposed with data layers from vegetation, geology and climate. A regression function for the isotope composition of the water isotopes in precipitation and collagen in ivory was developed to overcome the problem of imprecise origin of some of the sampled material. Multivariate statistics, such as nearest neighborhood and discriminate analysis were applied to eventually allow a statistical determination of the provenance for ivory of unknown origin. Our results suggest that the combination of isotopic parameters have the potential to provide predictable and complementary markers for estimating the origin of seized elephant ivory.

  3. Tektites: Origin as melts produced by the impact of small projectiles onto dry targets

    NASA Technical Reports Server (NTRS)

    Wasson, John T.

    1988-01-01

    The formation of tektites in general and layered tektites in particular seems to require a very special kind of cratering event. Evidence for the formation of pools of melt free of unmelted clasts has not been reported for the well-studied terrestrial craters such as Manicouagan or Ries. It is suggested that large amounts of relict-free melt were produced only when a sizeable fraction of the cratered target consisted of dry, high-porosity materials such as aeolian sediments. Since dry, high-porosity target materials are always confined to the outer 100 to 200 m of the Earth, the fraction of melt produced melt is probably higher in small (radius 50 to 500 m) craters than in large (r greater than 1 km) craters. Another reason to infer that the Southeast Asian tektites were produced in a multitude of small craters is the wide distribution of layered tektites. The file spans at least 1200 km, which would require ballistic ejection at velocities greater than 2 km s(-1) if all melt was generated in a single crater. It seems impossible to devise a scenario that would lead to the deposition of primary melt as a crystal-free pool at a distance of 600 km from the crater.

  4. Artificial tektites: an experimental technique for capturing the shapes of spinning drops

    PubMed Central

    Baldwin, Kyle A.; Butler, Samuel L.; Hill, Richard J. A.

    2015-01-01

    Determining the shapes of a rotating liquid droplet bound by surface tension is an archetypal problem in the study of the equilibrium shapes of a spinning and charged droplet, a problem that unites models of the stability of the atomic nucleus with the shapes of astronomical-scale, gravitationally-bound masses. The shapes of highly deformed droplets and their stability must be calculated numerically. Although the accuracy of such models has increased with the use of progressively more sophisticated computational techniques and increases in computing power, direct experimental verification is still lacking. Here we present an experimental technique for making wax models of these shapes using diamagnetic levitation. The wax models resemble splash-form tektites, glassy stones formed from molten rock ejected from asteroid impacts. Many tektites have elongated or ‘dumb-bell' shapes due to their rotation mid-flight before solidification, just as we observe here. Measurements of the dimensions of our wax ‘artificial tektites' show good agreement with equilibrium shapes calculated by our numerical model, and with previous models. These wax models provide the first direct experimental validation for numerical models of the equilibrium shapes of spinning droplets, of importance to fundamental physics and also to studies of tektite formation. PMID:25564381

  5. Artificial tektites: an experimental technique for capturing the shapes of spinning drops.

    PubMed

    Baldwin, Kyle A; Butler, Samuel L; Hill, Richard J A

    2015-01-01

    Determining the shapes of a rotating liquid droplet bound by surface tension is an archetypal problem in the study of the equilibrium shapes of a spinning and charged droplet, a problem that unites models of the stability of the atomic nucleus with the shapes of astronomical-scale, gravitationally-bound masses. The shapes of highly deformed droplets and their stability must be calculated numerically. Although the accuracy of such models has increased with the use of progressively more sophisticated computational techniques and increases in computing power, direct experimental verification is still lacking. Here we present an experimental technique for making wax models of these shapes using diamagnetic levitation. The wax models resemble splash-form tektites, glassy stones formed from molten rock ejected from asteroid impacts. Many tektites have elongated or 'dumb-bell' shapes due to their rotation mid-flight before solidification, just as we observe here. Measurements of the dimensions of our wax 'artificial tektites' show good agreement with equilibrium shapes calculated by our numerical model, and with previous models. These wax models provide the first direct experimental validation for numerical models of the equilibrium shapes of spinning droplets, of importance to fundamental physics and also to studies of tektite formation. PMID:25564381

  6. Multicomponent Diffusion between Felsic and Silicic Melts: Insights from Tektites and Experiments

    NASA Astrophysics Data System (ADS)

    Macris, C. A.; Asimow, P. D.; Zhang, Y.; Badro, J.; Stolper, E. M.; Eiler, J. M.

    2014-12-01

    Tektites (natural glasses formed as quenched impact melt ejecta) commonly contain inclusions of nearly pure silica glass ("lechatelierite") thought to be quenched from molten silica produced by melting of quartz grains. We investigated chemical diffusion between lechatelierite (~100% SiO2) and surrounding felsic glass (~73% SiO2) in a natural indochinite tektite and in experimental analogues. We discovered concentration profiles of major elements across lechatelierite-felsic glass contacts that reflect diffusion between the two melts at high T as the they followed a ballistic trajectory prior to quenching. The profiles provide information on multicomponent diffusion at the high-silica end of composition space and on the thermal histories of tektites. To reproduce the profiles, we undertook a series of high T melting experiments using an aerodynamic levitation laser furnace. A starting mixture of powdered natural tektite plus quartz grains was exposed to temperatures of 1800-2400?C for 1-120 s. Direct comparison of concentration profiles between the indochinite and experiments reveals a best match at 2200?C and 50 s. This experiment successfully reproduced all major aspects of the concentration profiles observed in the natural sample including diffusion length scale, asymmetry, order of steepness of major element profiles, and uphill diffusion of K2O. Not enough information is available to model the full multicomponent diffusion problem, but SiO2 and Al2O3 concentration profiles from lechatelierite to surrounding felsic glass in the experiments can be fit well as a diffusion couple between silica melt and adjacent felsic melt using an effective binary diffusion approach and assuming that the effective binary SiO2 and Al2O3 diffusivities depend exponentially on SiO2 concentration. Further quantification of the diffusion behavior should allow constraints on the thermal histories of tektites.

  7. Ornithologists continue quest to locate the ivory-billed woodpecker

    NSDL National Science Digital Library

    2008-01-01

    Ivory-billed Woodpecker Chat [Real Player]http://www.nature.org/chat/lordgodbird/index.html?src=searchThe Search for the Ivory-Billed Woodpeckerhttp://www.birds.cornell.edu/ivory/Audubon: Ivory-billed woodpeckerhttp://www.mass.gov/lib/collections/dc/Audubon/Ivory_Billed_Woodpecker.htmIvory-billed woodpecker [pdf]http://www.fws.gov/ivorybill/Big Woods Conservation Partnershiphttp://www.ivorybill.org/Three years ago, a bird scientist claimed to have seen an ivory-billed woodpecker in Arkansas. It was an unusual sighting, mostly because the bird was supposedly extinct, and had been so since the 1940s. The alleged sighting set off a flurry of activity among ornithologists, and even those with little interest in bird watching became interested. The quest for this rare bird continues, as a team of researchers from Cornell University was recently dispatched to the White River National Wildlife Refuge in Arkansas to continue the search. To look for the bird, they have brought along tools like GPS coordinate monitors, automatic cameras, infrared flash strobes, and sensitive audio recorders. Of course, there are some in the birding community who remain convinced that there are no ivory-billed woodpeckers left at all. There are a number of believers however, and groups like the Nature Conservancy, the Audubon Society, and even NASA have provided support and technical assistance. Even noted biologist E. O. Wilson has chimed in on the subject, noting that while the bird may be gone forever, "Great science discoveries have come from longer odds." The first link leads to a fine piece from this Sunday's Boston Globe which reports on the quest to locate the ivory-billed woodpecker. The second link leads to a chat with author Phillip Hoose, who wrote a book about the ivory-billed woodpecker. Moving on, the third link leads to the homepage for the research expedition sponsored by the Cornell Lab of Ornithology. Here, visitors can learn more about the expedition and read dispatches from the field. The fourth link will take visitors to a drawing of the ivory-billed woodpecker by noted naturalist John James Audubon. The fifth link will lead visitors to the U.S. Fish & Wildlife Service's site dedicated to the ivory-billed woodpecker. Here visitors can read a draft recovery plan and also learn more about the bird. The last link will take visitors to the homepage of the Big Woods Conservation Partnership.

  8. Search for the 700,000-year-old source crater of the Australasian tektite strewn field

    NASA Technical Reports Server (NTRS)

    Schnetzler, C. C.; Garvin, J. B.

    1992-01-01

    Many tektite investigations have hypothesized that the impact crater that was the source of the extensive Australasian strewn field lies somewhere in or near Indochina. This is due to variations in abundance and size of tektites across the strewn field, variation of thickness of microtektite layers in ocean cores, nature and ablation characteristics across the field, and, above all, the occurrence of the large, blocky, layered Muong Nong-type tektites in Indochina. A recent study of the location and chemistry of Muong Nong-type and splash-form tektites suggests that the source region can be further narrowed to a limited area in eastern Thailand and southern Loas. Satellite multispectral imagery, a digital elevation dataset, and maps showing drainage patterns were used to search within this area for possible anomalous features that may be large degraded impact craters. Four interesting structures were identified from these datasets, and they are presented.

  9. Ivory identification by DNA profiling of cytochrome b gene.

    PubMed

    Lee, James Chun-I; Hsieh, Hsing-Mei; Huang, Li-Hung; Kuo, Yi-Chen; Wu, Jane-Hong; Chin, Shih-Chien; Lee, An-Hsing; Linacre, Adrian; Tsai, Li-Chin

    2009-03-01

    Ivory can be visually identified in its native form as coming from an elephant species; however, determining from which of the three extant elephant species a section of ivory originates is more problematic. We report on a method that will identify and distinguish the protected and endangered elephant species, Elephas maximus or Loxodonta sp. To identify the species of elephant from ivory products, we developed three groups of nested PCR amplifications within the cytochrome b gene that generate amplification products using highly degraded DNA isolated from confiscated ivory samples dating from 1995. DNA from a total of 382 out of 453 ivory samples were successfully isolated and amplified leading to species identification. All sequences were searched against GenBank and found to match with E. maximus and Loxodonta sp. with at least 99% similarity. The samples that were tested came from eight Asian elephants, 14 African forest elephants (Loxodonta cyclotis), and 360 African savannah elephants (Loxodonta africana). This study demonstrates a high success rate in species identification of ivory by a nested PCR approach within the cytochrome b gene which provides the necessary information for the protection of endangered species conservation. PMID:18612647

  10. Source of the Australasian tektite strewn field - A possible off-shore impact site

    NASA Technical Reports Server (NTRS)

    Schnetzler, C. C.; Walter, L. S.; Marsh, J. G.

    1988-01-01

    Although there is a preponderance of evidence that tektites were formed by asteroid impacts on the earth, no source crater has been found for the largest and youngest of the strewn fields - the Austalasian strewn field. A combined Seasat/Geos 3 altimeter data set of sea surface heights in the northern portion of the Australasian strewn field has been examined for negative gravity anomalies on the continental shelf and slope which might be related to the source crater for these tektites. A large negative anomaly called the Qui Nhon Slope Anomaly is a sea surface depression of approximately 1.5 meters over an area of 100 km diameter. It corresponds to a gravity anomaly of about -50 mgal. It is proposed that this anomaly may be due to the impact structure that produced the Australasian strewn field.

  11. Statistical Profiles of Highly-Rated Web Sites Melody Y. Ivory

    E-print Network

    Hearst, Marti

    Statistical Profiles of Highly-Rated Web Sites Melody Y. Ivory EECS Department UC Berkeley Berkeley, CA 94720-1776 ivory@cs.berkeley.edu Marti A. Hearst SIMS UC Berkeley Berkeley, CA 94720-4600 hearst

  12. For Immediate Release Lecture to follow the Syrian Revolt in Aleppo from Ivory Tower to

    E-print Network

    Shihadeh, Alan

    For Immediate Release Lecture to follow the Syrian Revolt in Aleppo from Ivory Tower to Battlefield University of Beirut is holding a lecture entitled "From Ivory Tower to Battlefield: Two Ethnographic

  13. Jesse M. Heines, Katy Brner, Melody Ivory, and Ed Gehringer. (2003) The Development, Maintenance,

    E-print Network

    Börner, Katy

    2003-01-01

    Jesse M. Heines, Katy Börner, Melody Ivory, and Ed Gehringer. (2003) The Development, Maintenance, katy@indiana.edu School of Library and Information Science Indiana University Melody Y. Ivory, myivory

  14. Of Ivory and Smurfs: Loxodontan MapReduce Experiments for Web Search

    E-print Network

    Lin, Jimmy

    Of Ivory and Smurfs: Loxodontan MapReduce Experiments for Web Search Jimmy Lin,1 Donald Metzler,2@umd.edu, metzler@yahoo-inc.com, {telsayed,lidan}@cs.umd.edu ABSTRACT This paper describes Ivory, an attempt

  15. The International Ban on Ivory Sales and its Effects on Elephant Poaching in Africa

    Microsoft Academic Search

    Andrew M. Lemieux; Ronald V. Clarke

    2009-01-01

    The Convention on International Trade in Endangered Species (CITES) secured an agreement in 1989 among its member states to ban the international trade in ivory. This disruption of the international ivory market was intended to reverse a sharp decline in the African elephant population, which resulted from widespread poaching for ivory in the previous decade. The continent's overall population of

  16. OUT OF TUNE IVORY POLICY: UNINTENDED CONSEQUENCES FOR MUSICIANS NICOLE BLUMENKEHL

    E-print Network

    Zhou, Pei

    OUT OF TUNE IVORY POLICY: UNINTENDED CONSEQUENCES FOR MUSICIANS NICOLE BLUMENKEHL New federal restrictions on the importation and exportation of ivory,1 coupled with imperfect pre-existing regulations,2 will explain how ivory has been used in the music industry and why its continued use is desirable. o This Note

  17. UMD and USC/ISI: TREC 2010 Web Track Experiments with Ivory

    E-print Network

    Lin, Jimmy

    UMD and USC/ISI: TREC 2010 Web Track Experiments with Ivory Tamer Elsayed,1 Nima Asadi,1 Donald@umd.edu ABSTRACT Ivory is a web-scale retrieval engine we have been develop- ing for the past two years, built developed, largely from scratch, a web-scale retrieval engine called Ivory [13]. Accomplishments included

  18. The Walrus and the Carpenter: Late Dorset Ivory Working in the High Arctic

    Microsoft Academic Search

    Genevieve M. LeMoine; Christyann M. Darwent

    1998-01-01

    Late Dorset sites on Little Cornwallis Island provide the collections from which an ivory reduction sequence is derived. Walrus crania were split sagittally and through the sinus cavity to isolate the tusk alveolus; the anterior alveolus was grooved or chopped to extract the tusk. The outer layer of primary ivory (as opposed to the innermost layer of marbled ivory) will

  19. Particles in late archean carawine dolomite (Western Australia) resemble muong nong-type tektites

    NASA Astrophysics Data System (ADS)

    Simonson, Bruce M.; Hornstein, Miriam; Hassler, Scott

    In addition to craters and related structures, large impacts may create strewn fields of ejecta that have the potential to be incorporated into the stratigraphic record. Nine layers rich in sand-size spherules of former silicate melt interpreted as impact ejecta have been reported from early Archean to early Paleoproterozoic successions. The layer in the late Archean Carawine Dolomite (Western Australia) is the only one of the nine which contains larger, more irregular particles of former silicate melt. The layer which contains the irregular particles is a 25 meter-thick composite of three coarse-grained, poorly sorted carbonate debris flows. The irregular particles are concentrated at the base of the lowest flow, whereas the spherules are most abundant in the finer, sandy upper parts of the flows, indicating they were segregated hydrodynamically. The spherules and irregular particles are both largely replaced by fibrous K-feldspar crystals. These crystals generally radiate inwards from the edges of the spherules, whereas they are commonly randomly oriented to parallel-fibrous in the irregular particles. The irregular particles also differ from the spherules in being larger and more angular on average, and in showing banding, abundant vesicles, and greater textural heterogeneity internally. A few of the larger irregular particles appear to have spherules embedded inside them, indicating they formed during the same event. Fine quartz crystals with rare candidates for relict planar deformation features are also included in a few of the irregular particles. While the irregular particles are unlike any of the clasts in the volcanoclastic layers in associated units, they are texturally similar to Muong Nong-type tektites, which generally have irregular blocky shapes, are layered, and contain relict minerals as inclusions. However, the irregular particles differ from the Muong Nong-type tektites in that they are smaller, more rounded, and may have been partially crystalline. If the irregular particles were originally tektites, they would be the oldest yet found, and the coarsest distal ejecta found to date in an early Precambrian succession. It appears, however, that they are not a perfect match for Muong Nong or any other type of tektite, which suggests some strewn fields may contain additional types of glassy ejecta that do not fit neatly into existing categories. Their existence also suggests that textures in tektite-like bodies can be stabilized by replacement during diagenesis and survive essentially indefinitely, and the irregular particles are probably products of an impact in continental rather than oceanic crust.

  20. Flight mechanics of the Ivory-billed Woodpecker (Campephilus principalis)

    Microsoft Academic Search

    Michael D. Collins

    Background Abstract: Two independent groups of ornithologists have recently reported observations of the Ivory-billed Woodpecker (Campephilus principalis), which was feared to be extinct despite a steady flow of reports since the last known nest sites were studied in the 1930s. From specimens and historical observations, it is known that this species has an unusual physiology and fascinating flight characteristics, including

  1. Cruising flight of the Ivory-billed Woodpecker (Campephilus principalis)

    Microsoft Academic Search

    Michael D. Collins

    A video obtained in the Pearl River basin in southeastern Louisiana provides the first data on the cruising flight of the Ivory-billed Woodpecker (Campephilus principalis). The folding of the wings against the body during the middle of the upstroke and other aspects of the wingtip elevation and wingspan curves match the characteristics of a large woodpecker. Of the two candidate

  2. Domestication of the Ivory Tower: Institutional Adaptation to Cultural Distance.

    ERIC Educational Resources Information Center

    Barnhardt, Ray

    2002-01-01

    Examines the experiences of Native and non-Native Alaskan teacher educators in rural Alaska, describing opportunities for capitalizing on field settings available to faculty at any university. Discusses reasons for putting faculty in the field, looking at field-based training for Native teachers, the "ivory tower" versus the real world,…

  3. Economics of Antipoaching Enforcement and the Ivory Trade Ban

    Microsoft Academic Search

    Erwin H. Bulte; G. Cornelis van Kooten

    1999-01-01

    A model of elephant conservation that includes illegal poaching, enforcement effort, and legal culling is used to analyze enforcement and elephant populations for alternative policies, with and without legal trade in ivory. Consistent with previous theoretical models, banning trade may increase or decrease equilibrium stocks. As an empirical application, information for Zambia, along with sensitivity analysis, are used to show

  4. Tektite 2 habitability research program: Day-to-day life in the habitat

    NASA Technical Reports Server (NTRS)

    Nowlis, D. P.

    1972-01-01

    Because it is widely agreed that the field of environmental psychology is quite young, it was determined that a sample of recorded observations from a representative mission should be included in the report on Tektite to give the professional reader a better feeling of normal day-to-day life in the isolated habitat. Names of the crew members have been replaced with numbers and some off-color words have been replaced by more acceptable slang; some remarks have been omitted that might lead to easy identification of the subjects. Otherwise, the following pages are exactly as transcribed during the late afternoons and the evenings of the mission.

  5. Comparison of the magnetic properties and Mossbauer analysis of glass from the Cretaceous-Tertiary boundary, Beloc, Haiti, with tektites

    NASA Technical Reports Server (NTRS)

    Thorpe, A. N.; Senftle, F. E.; May, L.; Barkatt, A.; Adel-Hadadi, M. A.; Marbury, G. S.; Izett, G. A.; Maurrasse, F. R.

    1994-01-01

    The magnetic properties of black Beloc glass have been measured. The Curie constant, the magnetization, and the magnetic susceptibility of the Beloc glass fall within the known ranges observed for tektites. However, the temperature-independent component of the magnetic susceptibility is slightly higher than that found for tektites. Moreover, it is not possible to match the experimental magnetic data for the Beloc glass with the calculated values using the previously reported Fe(3+)/Fe(2+) ratio of 0.7. The oxidation state of Fe was therefore redetermined by Mossbauer measurements, and the Fe(3+)/Fe(2+) ratio was found to be 0.024 plus or minus 0.015. Using the redetermined value of the ratio, the magnetic parameters were again calculated using formulas that are applicable to tektites, and good agreement was found between the calculated and experimental values. The experimental magnetic measurements and the redetermined Fe(3+)/Fe(2+) ratio of the Beloc glass specimens are essentially the same as those found for tektite glass.

  6. Petrographic and petrological studies of lunar rocks. [Apollo 15 breccias and Russian tektites

    NASA Technical Reports Server (NTRS)

    Winzer, S. R.

    1978-01-01

    Clasts, rind glass, matrix glass, and matrix minerals from five Apollo 15 glass-coated breccias (15255, 15286, 15465, 15466, and 15505) were studied optically and with the SEM/microprobe. Rind glass compositions differ from sample to sample, but are identical, or nearly so, to the local soil, suggesting their origin by fusion of that soil. Most breccia samples contain green or colorless glass spheres identical to the Apollo 15 green glasses. These glasses, along with other glass shards and fragments, indicate a large soil component is present in the breccias. Clast populations include basalts and gabbros containing phases highly enriched in iron, indicative of extreme differentiation or fractional crystallization. Impact melts, anorthosites, and minor amounts of ANT suite material are also present among the clasts. Tektite glasses, impact melts, and breccias from the Zhamanshin structure, USSR, were also studied. Basic tektite glasses were found to be identical in composition to impact melts from the structure, but no satisfactory parent material has been identified in the limited suite of samples available.

  7. Comment on "Ivory-billed woodpecker (Campephilus principalis) persists in continental North America".

    PubMed

    Sibley, David A; Bevier, Louis R; Patten, Michael A; Elphick, Chris S

    2006-03-17

    We reanalyzed video presented as confirmation that an ivory-billed woodpecker (Campephilus principalis) persists in Arkansas (Fitzpatrick et al., Reports, 3 June 2005, p. 1460). None of the features described as diagnostic of the ivory-billed woodpecker eliminate a normal pileated woodpecker (Dryocopus pileatus). Although we support efforts to find and protect ivory-billed woodpeckers, the video evidence does not demonstrate that the species persists in the United States. PMID:16543443

  8. Fourier-transform Raman spectra of ivory III: identification of mammalian specimens

    NASA Astrophysics Data System (ADS)

    Edwards, H. G. M.; Farwell, D. W.; Holder, J. M.; Lawson, E. E.

    1997-11-01

    The FT-Raman spectra of six mammalian ivories, other than elephant and mammoth, are presented and spectral differences formulated into a protocol for the identification of animal species from the ivory samples. In this study, sperm whale, walrus, wart hog, narwhal, hippopotamus and domestic pig are considered. The results, which are obtained non-destructively from a variety of specimens, suggest that FT-Raman spectroscopy provides a potentially useful method for the identification of mammalian ivory.

  9. Isotopic signatures of black tektites from the K-T boundary on Haiti - Implications for the age and type of source material

    NASA Technical Reports Server (NTRS)

    Premo, W. R.; Izett, G. A.

    1992-01-01

    An isotopic study was carried out to characterize the type of black tektites from the Cretaceous-Tertiary (K-T) boundary on Haiti (the first reasonably well-preserved impact-derived material recovered from the K-T boundary), in order to help characterize the tektite source material (i.e., the type of rocks that were melted and ejected during the impact event(s) at around 64.5 Ma). Results show that the isotopic data and all of the element concentration data obtained are consistent with an andesitic-dacitic composition for the tektites and their source material. The Nd isotopic data suggest that the source rocks were not older than Silurian (T(chur) = 400 Ma) in age, and were composed largely of young (less than 1080 Ma) crustal material. Of the suspected K-T boundary impact sites, both the Manson (Iowa) and Chicxulub (Yucatan) structures occur in suitable lithologies to yield the Haitian black tektites.

  10. Source-area determination of elephant ivory by isotopic analysis

    Microsoft Academic Search

    N. J. van der Merwe; J. A. Lee-Thorp; J. F. Thackeray; A. Hall-Martin; F. J. Kruger; H. Coetzee; R. H. V. Bell; M. Lindeque

    1990-01-01

    RECENT international efforts to conserve the African elephant Loxodonta africana prompted us to seek an appropriate method for determining the area from which individual tusks were derived. Trace element analysis of ivory has indicated the potential of chemical analysis for source identification1, but recent isotopic studies of African mammals2-5 suggest another approach. Stable carbon isotope ratios (13C\\/12C) in elephant bone

  11. Tektite 1, man-in-the-sea project: Marine Science Program

    USGS Publications Warehouse

    Clifton, H.E.; Mahnken, C.V.W.; Van Derwalker, J. C.; Waller, R.A.

    1970-01-01

    The Tektite experiment was designed to provide data for a number of behavioral, biomedical, and engineering studies in addition to the marine sciences program. Conditions for some of these studies were not altogether compatible with the program for the marine sciences. For example, isolation imposed by human behavioral studies precluded physical contact with the surface team, even though such contact was physically possible and desirable for the conduct of the marine sciences program. Isolation also imposed on the scientific team the duty of all in-habitat maintenance, both scheduled and unscheduled, thereby taking substantial time from scientific research. In addition, between 10 and 20 percent of the waking time was devoted to performance of psychological tests required for the biomedical studies. Most of the experiments were directed toward detecting potentially adverse changes and thus were accepted as necessary and desirable. The only health problem to affect the scientific program during the dive was a minor external ear infection contracted by all the divers. Nonetheless, the experiment demon. strated, at least to our satisfaction, the advantages of underwater habitation and saturation diving for biological and geological research. A major advantage is the opportunity for continuous monitoring of organisms or processes. In addition, underwater habitation provides for considerably more research time in the water than surface diving or intermittent bottom dwelling, and this advantage increases greatly as the depth of habitation increases. Even in the relatively shallow depths at which Tektite 1 was conducted, the undersea team could spend appreciably more time at work in the water than their colleagues on the surface. Finally, Tektite 1 demonstrated that the scientist who lives in the sea need not have the extensive qualifications of a professional diver. Of the four scientists of the in-habitat team, only Crew Chief Waller was so qualified; the other three had used scuba as a research tool, but on a relatively limited basis. Any healthy, well-conditioned marine scientist with a basic diving background is capable of extending his research into the shallow sea on a full-time basis. It is hoped that many such scientists will in the future be able to utilize the undersea laboratory.

  12. 76 FR 15047 - Port of Ivory, LLC-Operation Exemption-Line of Railroad in Tulare County, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-18

    ...Board [Docket No. FD 35475] Port of Ivory, LLC--Operation Exemption--Line of Railroad in Tulare County, CA Port of Ivory, LLC (Port), a limited liability company...Railroad Company (SJVR) at a point known as Ivory (milepost 232.3 on SJVR's Exeter...

  13. Oblique impact jetting of geological materials

    NASA Astrophysics Data System (ADS)

    Yang, Wenbo; Ahrens, Thomas J.

    1994-07-01

    To understand jetting of earth materials, gabbro slabs ( 5 mm thick) were accelerated to 1.5-2 km/s and impacted inclined gabbro (5-10 mm thick), novaculite (10 mm thick) and porous sandstone (12 mm thick) targets at angles of 30°-60°. The ejecta were collected using a catcher box filled with styrofoam and the particles were extracted using chloroform. The mass of the ejected particles per unit area (˜50 mg/cm2) remains almost independent of impact velocity, inclination angle, thickness of the target and sample mineralogy and density. Based on this result, we predict that a 500 m diameter asteroid will produce only ˜107 gm tektite material. This is negligible comparing to an estimated 2×1013 gm in the Ivory Coast tektite strewn field. The recovered ejecta, unlike most tektites, contains both target and impactor materials. Both of the above results suggest that the tektites are not produced by jetting.

  14. Impact of the ivory trade ban on poaching incentives: a numerical example

    Microsoft Academic Search

    Rasmus Heltberg

    2001-01-01

    How does the CITES trade ban on international trade in elephant ivory affect the incentives to poach African elephants? In this commentary, the major effects of a trade ban on poaching incentives are captured in a simple static model of world ivory supply and demand. It is shown that a trade ban has ambiguous effects on poaching incentives. Although the

  15. Ivory vertebra on 18F-sodium fluoride scan: an old sign in a new modality.

    PubMed

    Oldan, Jorge Daniel; Kuzminski, Samuel; James, Olga

    2014-11-01

    We report a case of ivory vertebra on 18F-sodium fluoride. A prostate cancer patient had a 18F-sodium fluoride PET scan to evaluate overall spread of disease. In addition to other findings of metastatic disease, the patient had an ivory vertebra. PMID:24566404

  16. Bone and ivory points in the Lower and Middle Paleolithic of Europe

    Microsoft Academic Search

    Paola Villa; Francesco D'errico

    2001-01-01

    The existence of shaped bone and ivory points, to be used as awls or with wooden hafts, has been suggested for the Lower Paleolithic sites of Torralba and Ambrona and for several Middle Paleolithic sites, such as Vaufrey, Combe Grenal, Pech de l'Azé I and Camiac. The use of hafted bone and ivory points would imply a spear armature technology

  17. Geographic variations in the composition of ivory of the African elephant (Loxodonta africana).

    PubMed

    Raubenheimer, E J; Brown, J M; Rama, D B; Dreyer, M J; Smith, P D; Dauth, J

    1998-08-01

    Tracing the source of origin of illegal ivory will contribute to the identification of poorly managed game parks and facilitate steps taken to prevent the African elephant from becoming extinct. This study was aimed at establishing a database on the composition of ivory obtained from elephant sanctuary areas in Southern Africa. Fragments of elephant ivory from seven geographically distinct areas in South Africa, Namibia and Botswana were analysed for inorganic and organic content. A total of 20 elements was detected in the inorganic fraction of ivory, some in concentrations as low as 0.25 microg/g. The concentrations of calcium, phosphate, magnesium, fluoride, cobalt and zinc showed statistically significant differences (p < 0.007) between ivory obtained from different regions. Analyses of the organic fraction identified 17 amino acids. Ivory from arid regions showed significantly lower proline plus hydroxyproline content and under-hydroxylation of lysine residues. This study indicates that chemical analyses of ivory could be beneficial in tracing the source of illegal ivory. PMID:9758047

  18. EVALUATION OF RAMAN SPECTROSCOPY FOR THE NON DESTRUCTIVE DIFFERENTIATION BETWEEN CONTRABAND IVORIES

    Microsoft Academic Search

    N. F. Nik Hassan; H. G. M. Edwards; N. Arya

    It is the purpose of this study to evaluate several wavelengths of excitation for Raman instrumentation and where possible to acquire data using remote fibre optic probes to examine the feasibility of accessing Raman data for selected contraband ivories The high demand for ivory trade resulted in a significant declining population in elephant herds some two decades ago (1). This

  19. Some effects of gas adsorption on the high temperature volatile release behavior of a terrestrial basalt, tektite and lunar soil

    NASA Technical Reports Server (NTRS)

    Graham, D. G.; Muenow, D. W.; Gibson, E. K., Jr.

    1979-01-01

    Mass pyrograms obtained from high-temperature, mass psectrometric pyrolysis of a glassy theoleiitic submarine basalt and a tektite, ground in air to less than 64 microns, have shown N2 and SO release patterns very similar to those from the pyrolysis of mature lunar soil fines. The N2 and CO release behavior from the terrestrial samples reproduces the biomodal, high-temperature (approximately 700 and 1050 C) features from the lunar samples. Unground portions of the basalt and tektite show no release of N2 and CO during pyrolysis. Grinding also alters the release behavior and absolute amounts of H2O and CO2. It is suggested that adsorption of atmospheric gases in addition to solar wind implantation of ions may account for the wide range of values in previously reported concentrations of carbon and nitrogen from lunar fines.

  20. Ancient biodeterioration: an FT-Raman spectroscopic study of mammoth and elephant ivory.

    PubMed

    Edwards, Howell G M; Jorge Villar, Susana E; Nik Hassan, Nik F; Arya, Nlin; O'Connor, Sonia; Charlton, Donna M

    2005-10-01

    Raman spectra of mammoth ivory specimens have been recorded using near-infrared excitation, and comparisons made with modern Asian and African elephant ivories. Whereas the most ancient mammoth ivory (60-65 ky) showed no evidence for an organic collagen component, more recent samples of mammoth ivory indicated that some preservation had occurred, although with biodeterioration of the protein structure exhibited by the amide I and III bands in the 1200-1700 cm(-1) region of the Raman spectrum. The consequent difficulties encountered when applying chemometrics methods to ancient ivory analysis (which are successful for modern specimens) are noted. In the most ancient mammoth ivory specimens, which are extensively fragmented, evidence of mineralization is seen, with the production of gypsum, calcite and limonite; Raman microscopic analysis of crystalline material inside the fissures of the mammoth ivory shows the presence of gypsum as well as cyanobacterial colonisation. The application of Raman spectroscopy to the nondestructive analysis of archaeological materials in order to gain information of relevance to their preservation or restoration is highlighted. PMID:16132152

  1. Biodegradation of ivory (natural apatite): possible involvement of fungal activity in biodeterioration of the Lewis Chessmen.

    PubMed

    Pinzari, Flavia; Tate, James; Bicchieri, Marina; Rhee, Young Joon; Gadd, Geoffrey Michael

    2013-04-01

    Fungal biodeterioration of ivory was investigated with in vitro inoculation of samples obtained from boar and walrus tusks with the fungi Aspergillus niger and Serpula himantioides, species of known geoactive abilities. A combination of light and scanning electron microscopy together with associated analytical techniques was used to characterize fungal interactions with the ivory, including changes in ivory composition, dissolution and tunnelling, and the formation of new biominerals. The research was aimed at providing further understanding of the potential roles of fungi in the colonization and deterioration of ivory in terrestrial environments, but also contributes to our knowledge regarding the possible origins of the surface damage observed on early medieval sculptures made largely from walrus tusks, referred to as 'the Lewis hoard of gaming pieces', that were presumably produced for playing chess. The experiments have shown that the possibility of damage to ivory being caused by fungi is realistic. Scanning electron microscopy revealed penetration of fungal hyphae within cracks in the walrus tusk that showed also widespread tunnelling by fungal hyphae as well as 'fungal footprints' where the surface was etched as a consequence of mycelial colonization. Similar phenomena were observed with boar tusk ivory, while production of metabolites could lead to complete dissolution of the sample. Colonization of ivory and/or exposure to fungal activity lead to extensive secondary biomineral formation, and this was identified as calcium oxalate, mainly as the monohydrate, whewellite. PMID:23157656

  2. Legal ivory trade in a corrupt world and its impact on African elephant populations.

    PubMed

    Bennett, Elizabeth L

    2015-02-01

    Illegal hunting of African elephants (Loxodonta africana) for ivory is causing rapid declines in their populations. Since 2007, illegal ivory trade has more than doubled. African elephants are facing the most serious conservation crisis since 1989, when international trade was banned. One solution proposed is establishment of a controlled legal trade in ivory. High prices for ivory mean that the incentives to obtain large quantities are high, but the quantity of tusks available for trade are biologically constrained. Within that context, effective management of a legal ivory trade would require robust systems to be in place to ensure that ivory from illegally killed elephants cannot be laundered into a legal market. At present, that is not feasible due to corruption among government officials charged with implementing wildlife-related legislation. With organized criminal enterprises involved along the whole commodity chain, corruption enables the laundering of illegal ivory into legal or potentially legal markets. Poachers and traffickers can rapidly pay their way out of trouble, so the financial incentives to break the law heavily outweigh those of abiding by it. Maintaining reliable permitting systems and leak-proof chains of custody in this context is challenging, and effective management breaks down. Once illegal ivory has entered the legal trade, it is difficult or impossible for enforcement officers to know what is legal and illegal. Addressing corruption throughout a trade network that permeates countries across the globe will take decades, if it can ever be achieved. That will be too late for wild African elephants at current rates of loss. If we are to conserve remaining wild populations, we must close all markets because, under current levels of corruption, they cannot be controlled in a way that does not provide opportunities for illegal ivory being laundered into legal markets. PMID:25103555

  3. 'Ivory': Optomechanical modeling of an optical image correlator

    NASA Astrophysics Data System (ADS)

    Hatheway, Alson E.

    2005-09-01

    "Ivory" is a computer code that generates Optomechanical Constraint Equations (OCE) from the optical physical prescription data. The OCE predict the translation, rotation and size change of an optical image from the motions, temperature changes and other factors affecting the optical elements forming the image. An airborne optical image correlator has been designed and built for UAV applications. Commercially available optical components were used throughout. The centerpiece of the mechanical design was control of the manufacturing and assembly tolerances to assure precise alignment and stable image registration for high performance operation. Control was maintained during the design and manufacturing process by the use of optomechanical models based upon the Optomechanical Constraint Equations (OCE). The equations provided a comprehensive optomechanical model that related the critical optical functions (images and diffraction patterns) to the translation and rotation (dimensions and tolerances) of all the piece-parts. The equations also modeled the thermal and wavelength stability of the correlator. Engineers may generate the OCE by longhand calculations or in a computer spreadsheet. For larger optical systems this can be very time consuming. Ivory automates the generation of the OCE for the engineer making timely and accurate calculations of the image registration errors possible, even for very complex optical systems. This paper shows the application of the OCE to a variety of challenges in the optical image correlator: athermalization, alignment procedures, optical and mechanical tolerance budgets, optimizing the folded geometry and sizing alignment mechanisms.

  4. Obsidians and tektites: Natural analogues for water diffusion in nuclear waste glasses

    SciTech Connect

    Mazer, J.J.; Bates, J.K.; Bradley, C.R. [Argonne National Lab., IL (United States); Stevenson, C.M. [Archaeological Services Consultants, Inc., Columbus, OH (United States)

    1991-11-01

    Projected scenarios for the proposed Yucca Mountain repository include significant periods of time when high relative humidity atmospheres will be present, thus the reaction processes of interest will include those known to occur under these conditions. The ideal natural analog for the proposed Yucca Mountain repository would consist of natural borosilicate glasses exposed to expected repository conditions for thousands of years; however, the prospects for identifying such an analog are remote, but an important caveat for using natural analog studies is to relate the reaction processes in the analog to those in the system of interest, rather than a strict comparison of the glass compositions. In lieu of this, identifying natural glasses that have reacted via reaction processes expected in the repository is the most attractive option. The goal of this study is to quantify molecular water diffusion in the natural analogs obsidian and tektites. Results from this study can be used in assessing the importance of factors affecting molecular water diffusion in nuclear waste glasses, relative to other identified reaction processes. In this way, a better understanding of the long-term reaction mechanism can be developed and incorporated into performance assessment models. 17 refs., 4 figs.

  5. California Coast

    Atmospheric Science Data Center

    2014-05-15

    ... Fault on the south and the Garlock Fault on the north. To the northwest are the Sierra Nevada mountains and the agricultural fields of ... MISR category:  gallery date:  Mar 14, 2000 Images:  California Coast ...

  6. [Endemic onchocerciasis in forested zones of Ivory Coast: prevalence rate and microfilarial densities].

    PubMed

    Diarrassouba, S; Traore, S; Riviere, F

    1996-01-01

    Since 1974 grassy plain areas of the western Africa have been protected by the Onchocerciasis Control Programme, but wooded endemic areas are also of concerned to countries in the region. Numerous studies have been performed to study endemic features of onchocerciasis in wooded areas. A parasitologic/entomologic survey was conducted between April and October 1990 in 5 villages in wooded areas located in Cote d'Ivoire. The parasitologic survey consisted of blood-free skin snips taken from both iliac crests of all subjects one year or over. Microfilarial counts performed after soaking biopsy material in distilled water for 30 minutes allowed characterization of the disease in the area. Overall microfilariae were found in 60.51% of the population indicating that onchocerciasis was highly endemic. The level of endemicity varied from one village to another. Prevalence was same in the two sexes and increased with age. Microfilarial density was the same in men and women up to the age of 9 years. After that time the density was at least twofold higher in men than in women at the same age. Although onchocerciasis is highly endemic in the area, blindness is uncommon. PMID:8767795

  7. Longitudinal zonation of lotic insects in the Bandama River system (Ivory Coast)

    Microsoft Academic Search

    Francois Marie Gibonl; Bernhard Statzner

    1985-01-01

    The longitudinal zonation of three lotic insect groups, viz. Hydropsychidae (Trichoptera), Philopotamidae (Trichoptera), and the Simulium damnosum complex (Diptera) in the Bandama River system (West Africa) is anomalous when compared to the patterns known from other geographical areas: In general from the highest to the lowest riffles downstream there appears to be no clear species replacement. Instead, there is a

  8. IVORY - An Object-Oriented Framework for Physics-Based Information Visualization in Java

    Microsoft Academic Search

    T. C. Sprenger; Markus H. Gross; Daniel Bielser; T. Strasser

    1998-01-01

    We present IVORY, a newly developed, platform-independent framework for physics-based visualization. IVORY is especially designed for information visualization applications and multidi- mensional graph layout. It is fully implemented in Java 1.1 and its architecture features client-server setup, which allows to run the visualization even on thin clients. In addition, VRML 2.0 exports can be viewed by any VRML plugged-in WWW-browser.

  9. The diffraction grating in the Ivory optomechanical modeling tools

    NASA Astrophysics Data System (ADS)

    Hatheway, Alson E.

    2013-09-01

    In imaging spectrometers it is important that both the image of the far-field object and the image of the slit be stable on the detector plane. Lenses and mirrors contribute to the motions of these images but motions of the diffraction grating also have their own influences on these image motions. This paper develops the vector equations for the images (spectra) of the diffraction grating and derives their optomechanical influence coefficients from them. The Ivory Optomechanical Modeling Tools integrates the diffraction grating into the larger optical imaging system and formats the whole system's influence coefficients suitably for both spreadsheet and finite element analysis methods. Their application is illustrated in an example of a spectrometer exposed to both static and dynamic disturbances.

  10. Ivory optomechanical tools for controlling random vibration effects

    NASA Astrophysics Data System (ADS)

    Hatheway, Alson E.

    2007-09-01

    Vibration effects can be a maj or limiter in the performance of optical instruments used for guidance, control, surveillance and observation. The author has recently developed software that takes the physical prescription data for the optical system, calculates the influence coefficients between all the elements in the system and the system's image and then prepares a NASTRAN finite element model ofthe optical imaging behavior. This model can be added to the elastic model ofthe optical instrument and NASTRAN can then calculate all the motions ofthe image on the detector. This paper describes the use of the Ivory Optomechanical Modeling Tools in analyzing optical instruments in vibration environments and uses a recent FUR project as a practical example oftheir utility.

  11. An international and multidisciplinary drilling project into a young complex impact structure: The 2004 ICDP Bosumtwi Crater Drilling Project---An overview

    Microsoft Academic Search

    Christian Koeberl; Bernd Milkereit; Jonathan T. Overpeck; Christopher A. Scholz; Philip Y. O. Amoako; Daniel Boamah; Sylvester Danuor; Tobias Karp; Jochem Kueck; Robert E. Hecky; John W. King; John A. Peck

    2007-01-01

    The Bosumtwi impact crater in Ghana, arguably the best-preserved complex young impact structure known on Earth, displays a pronounced rim and is almost completely filled by Lake Bosumtwi, a hydrologically closed basin. It is the source crater of the Ivory Coast tektites. The structure was excavated in 2.1-2.2 Gyr old metasediments and metavolcanics of the Birimian Supergroup. A drilling project

  12. The white-ivory somatic mutation test in Drosophila. The effects of larval age, increasing the number of copies of wi and the response to some reference mutagens.

    PubMed

    Howe, D; Clements, J

    1990-02-01

    The white-ivory somatic mutation test is based on reversion of the X-linked, recessive eye-colour mutation white-ivory to wild-type. Somatic reversion of white-ivory leads to clones of red facets in the white-ivory eyes of eclosing adult flies. The alkylating agents MMS, EMS and ENU and the mutagen DEB all induce high levels of white-ivory reversion. The response of different larval instars has been investigated and dose-response data for MMS and EMS is reported. Strains with additional copies of the white-ivory mutation are more sensitive to reversion but the increase in reversion is not as high as might be expected given the number of white-ivory mutations present. Females, having twice the number of white-ivory copies, tend to show higher levels of reversion than males of the same strain. PMID:1689005

  13. Neodymium and strontium isotopic study of Australasian tektites - New constraints on the provenance and age of target materials

    NASA Technical Reports Server (NTRS)

    Blum, Joel D.; Papanastassiou, D. A.; Wasserburg, G. J.; Koeberl, C.

    1992-01-01

    The Nd and Sr isotopic compositions of Australasian tectites (including two flanged Australian tectites, two low-SiO2 Muong Nong-type tectites, and three high-SiO2 Muong Nong-type tectites) and the Nd, Sm, Sr, and Rb concentrations were investigated by isotope-dilution thermal ionization mass spectrometry, and the Sm-Nd and Rb-Sr isotope systematics were used to study the characteristics of the parental material. It is shown that the Nd and Sr isotopic data provide evidence that all Australasian tektites were derived from a single sedimentary formation with a narrow range of stratigraphic ages close to 170 Ma. It is suggested that all of the Australasian tektites were derived from a single impact event and that the australites represent the upper part of a melt sheet ejected at high velocity, whereas the indochinites represent melts formed at a lower level in the target material distributed closer to the area of the impact.

  14. Science education in rural America: Adaptations for the ivory tower

    NASA Astrophysics Data System (ADS)

    van Doren, Gregory S.

    This thesis illustrated what can happen when academic culture disconnects from the cultures surrounding it. It showed that formal school environments are not always the best places to learn. A discussion of the debate between coherence and fragmentation learning theories illustrated academic chasms and a mindset that science education must originate from within ivory towers to be valued. Rationales for place-based science education were developed. Two National Science Foundation initiatives were compared and contrasted for relevance to Native Science education (a) Informal Science Education and (b) Science Education for New Civic Engagement and Responsibilities. A National Science Foundation instrument, known as the Self-Assessment of Learning Gains, was selected to field-test measures of learning science outside of university science courses. Principles of chemistry were taught in community workshops, and those participant self-assessments were compared to self-assessments of students in introductory chemistry courses at two universities. University students consistently claimed the greatest learning gains, in the post-course survey, for the same areas that they claimed to have the greatest understanding, in the pre-course survey. The workshop participant responses differed, depending upon location of the learning environment. When held in a university laboratory, ideas were not related to other cultures, even when a Native Elder was present to describe those relationships. When held in a cultural center, those relationships were among the highest learning gains claimed. One of the instrument's greatest assets was the ability to measure reactions, level 4 of Bennett's (1976) hierarchy of evidence for program evaluation. A long-term commitment to informal science education (not short-term exhibits or programs), combined with negotiated place-based education was recommended as a crucially needed initiative, if relationships between universities and Native American communities are to improve. Some chasms created within ivory towers may never be bridged. Yet, those ideological chasms do not have to exist everywhere. The realities of working in the natural world and the practice of addressing multitudes of community challenges can alter perspectives, when horizons change from the edge of one's desk to those that meet the sea or sky.

  15. Random image motion analysis with Ivory 2.0 FE models

    NASA Astrophysics Data System (ADS)

    Hatheway, Alson E.

    2007-09-01

    A MWIR FLIR has been designed as the principal pointing and tracking system for a turret full of other sensors and systems in its payload. The payload is stabilized and vibration isolated but some vehicle disturbances get through these systems to excite the optical bench of the payload. These residual disturbances cause boresight shift and image blur of the IR image on the FLIR's cooled detector. Ivory was used to prepare a thermal and structural dynamic NASTRAN model of the FLIR image's response to the residual disturbances. The physical prescription for the FLIR optics was put into Ivory and it calculated all the influence coefficients between the image on the detector and all the lens design variables and all the lens motions. Ivory then prepared the portion of the NASTRAN model that relates the optical element displacements to the image motions. The Ivory optical model was then attached to an elastic model of the FLIR and payload and the effects on the image of temperature changes, gravitational vector changes and residual random vibrations were analyzed in NASTRAN. This paper discusses the Ivory modeling process, the error budgets associated with the analysis, the debugging of the models and the final analytical results.

  16. Sandy Coasts

    NSDL National Science Digital Library

    Waves play a major role in breaking down and building up coastline features. But other factors, including tides, currents, and sediment type, also determine how erosional and depositional processes shape coastlines. This interactive feature introduces viewers to the landforms and features associated with sandy coasts. Typically located on passive margins in areas characterized by low wave energy, a wide continental shelf, and high offshore sediment influence, they develop depositional features such as extensive beaches and dunes, barrier islands, and sand spits.

  17. Notice to Nurserymen of the naming and release for propagaion of Ebony & Ivory crapemyrtle

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Lagerstroemia indica, ‘EBONY & IVORY’ is a white flowered crapemyrtle clone with burgundy foliage. This cultivar is recommended for trial by nurserymen and orticulturists as a flowering woody landscape plant in hardiness zones 6-9 and is particularly adapted to conditions in the southeastern U.S. ‘E...

  18. Putative audio recordings of the Ivory-billed Woodpecker (Campephilus principalis).

    PubMed

    Collins, Michael D

    2011-03-01

    Putative audio recordings of the Ivory-billed Woodpecker (Campephilus principalis) are presented along with discussions of the videos from which they were extracted and the observations that were made when these data were obtained. On two occasions, high-pitched calls were heard coming from the direction of a bird that was identified in the field as an Ivory-billed Woodpecker. These calls seem to match the description of an alarm call that was reported in the 1930s. One of the videos captured a series of the high-pitched calls, which sound similar to the Blue Jay (Cyanocitta cristata) bell call but do not match published sonograms of that call. A putative double knock, which is characteristic of the Ivory-billed Woodpecker, was captured in another video a little over a minute before a large bird with characteristics consistent with an Ivory-billed Woodpecker flew into view. Since it is extremely difficult to observe this critically endangered species, information on audio clues could have an impact on its conservation. PMID:21428525

  19. Nurturing and Validating Indigenous Epistemologies in Higher Education: Comment on "Domestication of the Ivory Tower."

    ERIC Educational Resources Information Center

    Romero, Mary Eunice

    2002-01-01

    Responds to a paper that focused on the "domestication of the ivory tower" and that highlighted indigenous, field-based education associated with higher education institutions in Alaska. Shares two stories that illustrate what indigenous students often encounter in higher education, places of learning that frequently devalue or ignore their world…

  20. Ivory-billed Woodpecker (Campephilus principalis) Persists in Continental North America

    Microsoft Academic Search

    John W. Fitzpatrick; Martjan Lammertink; M. David Luneau; Tim W. Gallagher; Bobby R. Harrison; Gene M. Sparling; Kenneth V. Rosenberg; Ronald W. Rohrbaugh; Elliott C. H. Swarthout; Peter H. Wrege; Sara Barker Swarthout; Marc S. Dantzker; Russell A. Charif; Timothy R. Barksdale; J. V. Remsen; Scott D. Simon; Douglas Zollner

    2005-01-01

    The ivory-billed woodpecker (Campephilus principalis), long suspected to be extinct, has been rediscovered in the Big Woods region of eastern Arkansas. Visual encounters during 2004 and 2005, and analysis of a video clip from April 2004, confirm the existence of at least one male. Acoustic signatures consistent with Campephilus display drums also have been heard from the region. Extensive efforts

  1. Unusual appearance of Schreger-like pattern in Hippopotamus amphibius ivory: wildlife forensics investigation of a netsuke.

    PubMed

    Sims, Margaret E

    2010-07-15

    The National Fish and Wildlife Forensics Laboratory routinely receives confiscated wildlife parts and products (including ivory) for identification purposes as part of wildlife law enforcement casework. Identification of evidentiary ivory typically involves a detailed and comprehensive visual and microscopic examination of the objects, as well as observation with ultraviolet light. Of thousands of ivory objects examined at the Lab, the author has observed unusual non-Proboscidean (elephant) objects with Schreger-like (cross-hatched) pattern. One of these objects was a small well-polished netsuke carved from a hippopotamus canine. PMID:20451339

  2. Combating the illegal trade in African elephant ivory with DNA forensics.

    PubMed

    Wasser, Samuel K; Joseph Clark, William; Drori, Ofir; Stephen Kisamo, Emily; Mailand, Celia; Mutayoba, Benezeth; Stephens, Matthew

    2008-08-01

    International wildlife crime is burgeoning in this climate of global trade. We contend that the most effective way to contain this illegal trade is to determine where the wildlife is being removed. This allows authorities to direct law enforcement to poaching hot spots, potentially stops trade before the wildlife is actually killed, prevents countries from denying their poaching problems at home, and thwarts trade before it enters into an increasingly complex web of international criminal activity. Forensic tools have been limited in their ability to determine product origin because the information they can provide typically begins only at the point of shipment. DNA assignment analyses can determine product origin, but its use has been limited by the inability to assign samples to locations where reference samples do not exist. We applied new DNA assignment methods that can determine the geographic origin(s) of wildlife products from anywhere within its range. We used these methods to examine the geographic origin(s) of 2 strings of seizures involving large volumes of elephant ivory, 1 string seized in Singapore and Malawi and the other in Hong Kong and Cameroon. These ivory traffickers may comprise 2 of the largest poaching rings in Africa. In both cases all ivory seized in the string had common origins, which indicates that crime syndicates are targeting specific populations for intense exploitation. This result contradicts the dominant belief that dealers are using a decentralized plan of procuring ivory stocks as they became available across Africa. Large quantities of ivory were then moved, in multiple shipments, through an intermediate country prior to shipment to Asia, as a risk-reduction strategy that distances the dealer from the poaching locale. These smuggling strategies could not have been detected by forensic information, which typically begins only at the shipping source. PMID:18786100

  3. Iron local structure in tektites and impact glasses by extended X-ray absorption fine structure and high-resolution X-ray absorption near-edge structure spectroscopy

    NASA Astrophysics Data System (ADS)

    Giuli, Gabriele; Pratesi, Giovanni; Cipriani, Curzio; Paris, Eleonora

    2002-12-01

    The local structure of iron in three tektites has been studied by means of Fe K-edge extended X-ray absorption fine structure (EXAFS) and high-resolution X-ray absorption near-edge structure (XANES) spectroscopy in order to provide quantitative data on distance and Fe coordination number. The samples studied are a moldavite and two australasian tektites. Fe model compounds with known Fe oxidation state and coordination number were used as standards in order to extract structural information from the XANES pre-edge peak. EXAFS-derived grand mean distances and Fe coordination numbers for the three tektite samples are constant within the estimated error ( =2.00 Å ± 0.02 Å, CN = 4.0 ± 0.4). In contrast to other data from the literature on Fe-bearing silicate glasses, the tektites spectra could not be fitted with a single Fe-O distance, but rather were fit with two independent distances (2 × 1.92 Å and 2 × 2.08 Å). High-resolution XANES spectra of the three tektites display a pre-edge peak whose intensity is intermediate between those of staurolite and grandidierite, thus suggesting a mean coordination number intermediate between 4 and 5. Combining the EXAFS and XANES data for Fe, we infer the mean coordination number to be close to 4.5. Comparison of the tektites XANES spectra with those of a suite of different impact glasses clearly shows that tektites display a relatively narrow range of Fe oxidation state and coordination numbers, whereas impact glasses data span a much wider range of Fe oxidation states (from divalent to trivalent) and coordination numbers (from tetra-coordinated to esa-coordinated). These data suggest that the tektite production process is very similar for all the known strewn fields, whereas impact glasses can experience a wide variety of different temperature-pressure-oxygen fugacity conditions, leading to different Fe local structure in the resulting glasses. These data could be of aid in discriminating between tektite-like impact glasses and impact glasses sensu strictu.

  4. PACIFIC COAST SALMON pacific Coast Salmon

    E-print Network

    181 PACIFIC COAST SALMON UNIT 12 pacific Coast Salmon Unit 12 ROBERT G. KOPE NMFS Northwest Fisheries Science Center Seattle Washington INTRODUCTION Pacific salmon support important commercial and recreational fisheries in Washington, Oregon, and California. Salmon are a vital part of the cul- ture

  5. http://http.cs.berkeley.edu/~wkahan/Cantilever.ps July 3, 1997 3:36 pm W. Kahan and Melody Ivory Univ. of Calif. @ Berkeley Page 1 of 11

    E-print Network

    California at Berkeley, University of

    http://http.cs.berkeley.edu/~wkahan/Cantilever.ps July 3, 1997 3:36 pm W. Kahan and Melody Ivory. Melody Y. Ivory Elect. Eng. & Computer Science Dept. #1776 University of California Berkeley CA 94720 to get the aforementioned results is available by electronic mail from the authors: ivory

  6. Rivers and Coasts

    NSDL National Science Digital Library

    This site provides information about rivers, coasts, and the processes affecting them. Students can view an animation of the water cycle, read about how rivers and coasts change, learn about estuaries, and view information on how rivers, coasts, and other water features influence people's lives. Glossaries and a teacher's page offering lesson plans, worksheets, and links to additional sites are also provided.

  7. Nondestructive discrimination of ivories and prediction of their specific gravity by Fourier-transform Raman spectroscopy and chemometrics.

    PubMed

    Shimoyama, Masahiko; Ninomiya, Toshio; Ozaki, Yukihiro

    2003-07-01

    Fourier-transform (FF) Raman spectroscopy and chemometrics were used for nondestructive analysis of ivories. The discrimination of five kinds of ivories, two subspecies of African elephant, mammoth, hippopotamus, and sperm whale, was investigated, and a calibration model for predicting their specific gravity was developed. FT-Raman spectra were measured in situ for them and chemometrics analyses were carried out for the 3050-350 cm(-1) region. The five kinds of ivories were clearly discriminated from each other on the scores plots of two or three principal components (PCs) obtained by principal component analysis (PCA). The loadings plot for PC 1 shows that the discrimination relies on the content ratio of organic collagenous protein and inorganic hydroxyapatite of ivories. The loadings plot for PC 2 shows that bands due to the CH3 and CH2 stretching modes of the protein also play a role in the discrimination. Using partial least squares regression (PLSR), we developed a calibration model that predicts the specific gravity of the ivories from the FT-Raman spectra. The correlation coefficient and root mean square error of cross validation (RMSECV) of this model were 0.980 and 0.024, respectively. PMID:12894836

  8. Evidence Suggesting that Ivory-billed Woodpeckers (Campephilus principalis) Exist in Florida Données suggérant la présence du Pic à bec ivoire ( Campephilus principalis) en Floride (États-Unis)

    Microsoft Academic Search

    Geoffrey E. Hill; Daniel J. Mennill; Brian W. Rolek; Tyler L. Hicks; Kyle A. Swiston

    The Ivory-billed Woodpecker (Campephilus principalis) disappeared from the forests of southeastern North America in the early 20 th Century and for more than 50 years has been widely considered extinct. On 21 May 2005, we detected a bird that we identified as an Ivory-billed Woodpecker in the mature swamp forest along the Choctawhatchee River in the panhandle of Florida. During

  9. Tektite-bearing, deep-water clastic unit at the Cretaceous-Tertiary boundary in northeastern Mexico

    SciTech Connect

    Smit, J. (Free Univ., Amsterdam (Netherlands)); Montanari, A.; Swinburne, N.H.M.; Alvarez, W. (Univ. of California, Berkeley (United States)); Hildebrand, A.R. (Univ. of Arizona, Tucson (United States)); Margolis, S.V.; Claeys, P. (Univ. of California, Davis (United States)); Lowrie, W. (Eidgenoessische Technische Hochschule, Zuerich (Switzerland)); Asaro, F. (Lawrence Berkeley Lab., CA (United States))

    1992-02-01

    The hypothesis of Cretaceous-Tertiary (K-T) boundary impact on Yucatan, Mexico, predicts that nearby sites should show evidence of proximal impact ejecta and disturbance by giant waves. An outcrop along the Arroyo el Mimbral in northeastern Mexico contains a layered clastic unit up to 3 m thick that interrupts a biostratigraphically complete pelagic-marl sequence deposited at more than 400 m water depth. The marls were found to be unsuitable for determining magnetostratigraphy, but foraminiferal biostratigraphy places the clastic unit precisely at the K-T boundary. The authors interpret this clastic unit as the deposit of a megawave or tsunami produced by an extraterrestrial impact. The clastic unit comprises three main subunits. (1) The basal 'spherule bed' contains glass in the form of tektites and microtektites, glass spherules replaced by chlorite-smectite and calcite, and quartz grains showing probable shock features. This bed is interpreted as a channelized deposit of proximal ejecta. (2) A set of lenticular, massive, graded 'laminated beds' contains intraclasts can abundant plant debris, and may the result of megawave backwash that carried coarse debris from shallow parts of the continental margin into deeper water. (3) At the top, several thin 'ripple beds' composed of fine sand are separated by clay drapes; they are interpreted as deposits of oscillating currents, perhaps a seiche. An iridium anomaly (921 {plus minus} 23 pg/g) is observed at the top of the ripple beds. Their observations at the Mimbral locality support the hypothesis of a K-T impact on nearby Yucatan.

  10. Tektite-bearing, deep-water clastic unit at the Cretaceous-Tertiary boundary in northeastern Mexico.

    PubMed

    Smit, J; Montanari, A; Swinburne, N H; Alvarez, W; Hildebrand, A R; Margolis, S V; Claeys, P; Lowrie, W; Asaro, F

    1992-02-01

    The hypothesis of Cretaceous-Tertiary (K-T) boundary impact on Yucatán, Mexico, predicts that nearby sites should show evidence of proximal impact ejecta and disturbance by giant waves. An outcrop along the Arroyo el Mimbral in northeastern Mexico contains a layered clastic unit up to 3 m thick that interrupts a biostratigraphically complete pelagic-marl sequence deposited at more than 400 m water depth. The marls were found to be unsuitable for determining magnetostratigraphy, but foraminiferal biostratigraphy places the clastic unit precisely at the K-T boundary. We interpret this clastic unit as the deposit of a megawave or tsunami produced by an extraterrestrial impact. The clastic unit comprises three main subunits. (1) The basal "spherule bed" contains glass in the form of tektites and microtektites, glass spherules replaced by chlorite-smectite and calcite, and quartz grains showing probable shock features. This bed is interpreted as a channelized deposit of proximal ejecta. (2) A set of lenticular, massive, graded "laminated beds" contains intraclasts and abundant plant debris, and may be the result of megawave backwash that carried coarse debris from shallow parts of the continental margin into deeper water. (3) At the top, several thin "ripple beds" composed of fine sand are separated by clay drapes; they are interpreted as deposits of oscillating currents, perhaps a seiche. An iridium anomaly (921 +/- 23 pg/g) is observed at the top of the ripple beds. Our observations at the Mimbral locality support the hypothesis of a K-T impact on nearby Yucatán. PMID:11537752

  11. AIDS-The Leading Cause of Adult Death in the West African City of Abidjan, Ivory Coast

    Microsoft Academic Search

    Kevin M. de Cock; Bernard Barrere; Lacina Diaby; Marie-France Lafontaine; Emmanuel Gnaore; Anne Porter; Daniel Pantobe; Georges C. Lafontant; Augustin Dago-Akribi; Marcel Ette; Koudou Odehouri; William L. Heyward

    1990-01-01

    In 1988 to 1989, 698 adult cadavers in Abidjan's two largest morgues were studied, representing 38 to 43% of all adult deaths in the city over the study period, and 6 to 7% of annual deaths. Forty-one percent of male and 32% of female cadavers were infected with human immunodeficiency virus (HIV). Fifteen percent of adult male and 13% of

  12. Fluid immiscibility and gold deposition in the Birimian quartz veins of the Angovia deposit (Yaouré, Ivory Coast)

    NASA Astrophysics Data System (ADS)

    Coulibaly, Y.; Boiron, M. C.; Cathelineau, M.; Kouamelan, A. N.

    2008-02-01

    The Paleoproterozoic terranes (Birimian) of West Africa are well known to host numerous economic gold mineralizations. The Angovia gold mineralization is located in a brecciated and mylonitic zone within the Birimian greenstones. The sulfide-gold mineralization is mainly represented by gold associated with pyrite and chalcopyrite. A fluid inclusion study undertaken on mineralized quartz veins revealed the presence of aqueous-carbonic (CO 2-H 2O) fluids, the association of carbonic (CO 2) and early aqueous fluids, followed by later aqueous (H 2O-salt) and finally nitrogen-rich fluids. Entrapment of the initial homogeneous aqueous-carbonic fluids prior to fluid immiscibility depicts the evolution of the P-T conditions during the exhumation of the terranes after the peak of green-schist metamorphism. The CO 2 rich-fluid occurs especially in gold-bearing quartz, and are considered as the main evidence of the ore-forming process in the gold-bearing quartz veins. It is considered as a product of immiscibility of the CO 2-H 2O parent. The volatile fraction of carbonic and aqueous-carbonic fluid inclusions is dominated by CO 2, containing minor amounts of N 2, even smaller amounts of CH 4 and sporadically, H 2S. The aqueous-carbonic fluids have moderate salinity (3-10 wt.% eq. NaCl). Late aqueous and N 2 - (CH 4-CO 2) fluids are considered as later, unrelated to the main ore stage, and were trapped during the cooling of the hydrothermal system from 300 to 200 °C. The immiscibility has been favored by a strong pressure drop, the main trapping P-T conditions being 320-370 °C and 105-135 MPa. The mineralizing process is likely related to the immiscibility event, which was probably favored by the release of the fluid pressure after fracturing along the main shear zones. The ore process is likely to have occurred along the main shear zones or related secondary structures affected by cycling of the fluid pressure and quartz sealing-fracturing processes. The superimposed process can also explain the relative complexity of the quartz textures and fluid inclusion microfractures, and the rather wide range in the density of both parent fluid and CO 2-dominated fluid.

  13. Parametric study of the impact of waste pollutants on groundwater: the case of Abidjan District (Ivory Coast)

    NASA Astrophysics Data System (ADS)

    Agnès Kouamé, Amenan; Jaboyedoff, Michel; Tacher, Laurent; Derron, Marc-Henri; Franz, Martin

    2015-04-01

    Abidjan like numerous African cities is experiencing a significant and uncontrolled population growth. The annual growth rate is estimated at 3.99% by the National Institute of Statistics. This rapid population growth also generates growing needs in general and especially for drinking water and economic activities. In the District of Abidjan, groundwater comes from the Mio-Pliocene age aquifer called "Continental Terminal". This unconfined aquifer is the main source of water supply. Its lithology consists of four levels. Actually only the two upper levels outcrop and constitute the main part of the Continental Terminal aquifer. Some recent studies report a potential overexploitation and pollution of Abidjan groundwater (Jourda, 1986, Kouame 2007, Deh, 2013). This deterioration in water quality could be due to the release of domestic and industrial waste water, pesticide and fertilizer from crops and toxic waste sites containing high doses of organochlorines, of hydrogen sulfide and sulfides. This risk is also linked to the economic activities such as car workshops, gas stations and the sand exploitation in the lagoon. To observe the likely evolution of such contaminants in the subsurface and we developed hydrogeological models that couple groundwater flow and transport with FEFLOW software. The model is composed of a sandy layer where two constant hydraulic heads of 55 m and 0.2 m are imposed on the north and the south respectively. We carried out grain size analysis of some samples (E2, E3, E4, E5, and E6) which shows particle size ranging between 0.0001 mm and 8 mm. This grain size analysis performed by sieving underwater and laser indicates that these five soils are: loamy sand with traces of clay and gravel for E2 and E5; Sandy loam with traces of clay for E3; Sand with traces of clay and gravel for E4 and Sand with traces of silt and clay for E6. Their porosity and average values of permeability coefficient K measured in the laboratory range from 0.2 to 0.4 and 2.9E-8 and 2.48E-5 m/s, respectively. These values of permeability are low. They were therefore multiplied by 10 in order to calibrate the model. This suggests that the environment of deposition of the sands is heterogeneous with coarse sand channels in places as it can be expected in such lagoon environment. The result of the model simulation in steady state indicates the groundwater flow direction (North-South) and the approach of pollutants plumes to some well fields after 20 years. References: Deh S. K. (2013). Contributions de l'évaluation de la vulnérabilité spécifique aux nitrates et d'un modèle de transport des organochlorés a la protection des eaux souterraines du district d'Abidjan (sud de la Côte d'Ivoire) 230p. Jourda J. P. (1987). Contribution à l'étude géologique et hydrogéologique de la région du Grand Abidjan (Côte d'Ivoire). Thèse de doctorat de 3ème cycle, Université scientifique, technique et médicale de Grenoble, 319p. Kouamé K. J. (2007). Contribution à la Gestion Intégrée des Ressources en Eaux (GIRE) du District d'Abidjan (Sud de la Côte d'Ivoire) : Outils d'aide à la décision pour la prévention et la protection des eaux souterraines contre la pollution, Thèse de doctorat unique de l'Université de Cocody, 229p.

  14. PEN-Ivory: the design and evaluation of a pen-based computer system for structured data entry.

    PubMed Central

    Poon, A. D.; Fagan, L. M.

    1994-01-01

    PEN-Ivory is a pen-based computer system that uses structured data entry for creating patient progress notes. Users make simple gestures such as circles, lines, and scratch-outs to enter medical findings from a controlled vocabulary. The result of an interaction with PEN-Ivory is a computer-generated patient progress note in English prose. We designed PEN-Ivory's user interface in a principled way. We first created multiple working prototypes, each differing in one of three user-interface characteristics. Then we empirically evaluated the prototypes in a controlled, experimental setting for their efficiencies in enabling users to create patient progress notes. The prototype that allowed the fastest data entry had the following three user-interface characteristics: it used a paging form, used a fixed palette of modifiers, and made available all findings from the controlled vocabulary at once. PMID:7949967

  15. One-step synthesis of collagen hybrid gold nanoparticles and formation on Egyptian-like gold-plated archaeological ivory.

    PubMed

    Spadavecchia, Jolanda; Apchain, Emilande; Albéric, Marie; Fontan, Elisabeth; Reiche, Ina

    2014-08-01

    A one-step method is reported to synthesize hybrid gold nanoparticles (AuNPs) by reduction of HAuCl4 in acetic solution in the presence of collagen (Col), dicarboxylic acid-terminated polyethylene glycol (PEG), and cetyltetrammonium bromide (CTAB) mixed with hydoxyapatite (HAP) as surfactants. Such formation process of AuNPs was shown to be responsible for purple stains naturally formed on Egyptianizing archaeological gilded ivories from 8th BC Syria. The understanding of this formation mechanism, which most likely involves a step with hybrid AuNPs, allows the establishing of an authenticity marker of ancient gold-plated ivories. PMID:24966058

  16. CONSERVATION. Genetic assignment of large seizures of elephant ivory reveals Africa's major poaching hotspots.

    PubMed

    Wasser, S K; Brown, L; Mailand, C; Mondol, S; Clark, W; Laurie, C; Weir, B S

    2015-07-01

    Poaching of elephants is now occurring at rates that threaten African populations with extinction. Identifying the number and location of Africa's major poaching hotspots may assist efforts to end poaching and facilitate recovery of elephant populations. We genetically assign origin to 28 large ivory seizures (?0.5 metric tons) made between 1996 and 2014, also testing assignment accuracy. Results suggest that the major poaching hotspots in Africa may be currently concentrated in as few as two areas. Increasing law enforcement in these two hotspots could help curtail future elephant losses across Africa and disrupt this organized transnational crime. PMID:26089357

  17. Non-destructive analysis of the two subspecies of African elephants, mammoth, hippopotamus, and sperm whale ivories by visible and short-wave near infrared spectroscopy and chemometrics.

    PubMed

    Shimoyama, Masahiko; Morimoto, Susumu; Ozaki, Yukihiro

    2004-06-01

    Visible (VIS) and short-wave near infrared (SW-NIR) spectroscopy was used for non-destructive analysis of ivories. VIS-SW-NIR (500-1000 nm) spectra were measured in situ for five kinds of ivories, that is two subspecies of African elephants, mammoth, hippopotamus, and sperm whale. Chemometrics analyses were carried out for the spectral data from 500 to 1000 nm region. The five kinds of ivories were clearly discriminated from each other on the scores plot of two principal components (PCs) obtained by principal component analysis (PCA). It was noteworthy that the ivories of the two subspecies of African elephants were discriminated by the scores of PC 1. The loadings plot for PC 1 showed that the discrimination relies on the intensity changes in bands due to collagenous proteins and water interacting with proteins. It was found that the scores plot of PC 2 is useful to distinguish between the ivories of the two subspecies of African elephants and the other ivories. We also developed a calibration model that predicted the specific gravity of five kinds of ivories from their VIS-SW-NIR spectral data using partial least squares (PLS)-1 regression. The correlation coefficient and root mean square error of cross validation (RMSECV) of this model were 0.960 and 0.037, respectively. PMID:15152335

  18. Circumpolar contamination in eggs of the high-arctic ivory gull Pagophila eburnea.

    PubMed

    Lucia, Magali; Verboven, Nanette; Strøm, Hallvard; Miljeteig, Cecilie; Gavrilo, Maria V; Braune, Birgit M; Boertmann, David; Gabrielsen, Geir W

    2015-07-01

    The ivory gull Pagophila eburnea is a high-Arctic species threatened by climate change and contaminants. The objective of the present study was to assess spatial variation of contaminant levels (organochlorines [OCs], brominated flame retardants [BFRs], perfluorinated alkyl substances [PFASs], and mercury [Hg]) in ivory gulls breeding in different areas across the Arctic region as a baseline for potential future changes associated with climate change. Contaminants were already determined in eggs from Canada (Seymour Island; except PFASs), Svalbard in Norway (Svenskøya), and 3 sites in Russia (Nagurskoe, Cape Klyuv, and Domashny). New data from Greenland allowed the investigation of a possible longitudinal gradient of contamination. The most quantitatively abundant OCs were p,p'-dichlorodiphenyldichloroethylene (DDE) and polychlorobiphenyls. Mercury concentrations were higher in Canada compared with other colonies. Eggs from Nagurskoe often were characterized by higher OC and BFR concentrations. Concentrations gradually decreased in colonies situated east of Nagurskoe. In contrast, PFAS concentrations, especially perfluorooctanoate and perfluorononanoate, were higher in Greenland. Some of the contaminants, especially Hg and p,p'-DDE, exceeded published thresholds known to disrupt the reproductive success of avian species. Overall, the levels of OCs, BFRs, and PFASs did not suggest direct lethal exposure to these compounds, but their potential synergetic/additive sublethal effects warrant monitoring. Environ Toxicol Chem 2015;34:1552-1561. © 2015 SETAC. PMID:25677940

  19. The Case of the Ivory-Billed Woodpecker: The Scientific Process and How It Relates to Everyday Life

    ERIC Educational Resources Information Center

    Stanger-Hall, Kathrin; Merriam, Jennifer; Greuling, Ruth Ann

    2007-01-01

    In this case study, based on the reported rediscovery of the Ivory-billed Woodpecker in April 2005, students examine a real-world example of the scientific process and explore the practical implications of their conclusions. The case tells the story of Brad Murky, a student and research assistant who must decide whether the available evidence is…

  20. An assessment of alternative methods of estimating the effect of the ivory trade ban on poaching effort

    Microsoft Academic Search

    Michael Burton

    1999-01-01

    The ban on international trade in ivory introduced by the international community in 1989 was intended to protect the declining stock of African elephant (Loxodonta africana), by providing a barrier between the range state and the principal consuming nations. If there is a residual trade, then the efficiency of the ban is determined by the decline in the price paid

  1. THE IMAGE OF THE "IVORY TOWER" INSTITUTION OF HIGH-ER LEARNING HAS NEVER TRULY FIT NJIT. OUR PREDECES-

    E-print Network

    Bieber, Michael

    THE IMAGE OF THE "IVORY TOWER" INSTITUTION OF HIGH- ER LEARNING HAS NEVER TRULY FIT NJIT. OUR- ING NEWARK'S BURGEONING MANUFACTURING INDUSTRY WITH A SKILLED TECHNICAL WORKFORCE. OVER THE YEARS, OUR the state a sufficient workforce of technological professionals to keep our high-tech industries growing

  2. ‘Ebony Embers’, ‘Ebony Fire’, ‘Ebony Flame’, ‘Ebony Glow’ and ‘Ebony and Ivory’ Five New Dark-leaved Crape Myrtles

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Ebony Embers’, ‘Ebony Fire’, ‘Ebony Flame’, ‘Ebony Glow’ and ‘Ebony and Ivory’ are cultivars which are predominantly L. indica in heritage that combine persistent black-purple leaves and a range of flower colors with intermediate growth habits. ‘Ebony Embers’ has a vase shaped growth habit with dime...

  3. 'Ebony Embers', 'Ebony Fire', 'Ebony Flame','Ebony Glow' and 'Ebony and Ivory' Dark-Leaf Crapemyrtles

    Technology Transfer Automated Retrieval System (TEKTRAN)

    ‘Ebony Embers’, ‘Ebony Fire’, ‘Ebony Flame’, ‘Ebony Glow’ and ‘Ebony and Ivory’ are cultivars which are predominantly L. indica in heritage that combine persistent black-purple leaves and a range of flower colors with intermediate growth habits. ‘Ebony Embers’ has a vase shaped growth habit with dim...

  4. Sabine's Gull (Xema sabini), Ross's Gull (Rhodostethia rosea) and Ivory Gull (Pagophila eburnea) Gulls in the Arctic: A Review

    Microsoft Academic Search

    SVEN BLOMQVIST; MAGNUS ELANDER

    The earliest information on Sabine's gull, Ross's gull and Ivory gull was collected by several heroic arctic explorers during the nineteenth century and the beginning of the twentieth. Ross's gull was discovered in northern Canada in 1823 by James C. Ross and Sabine's gull in northwestern Greenland in 1818 by Edward Sabine. S.A. Buturlin was the first to find the

  5. West Coast Fog

    NSDL National Science Digital Library

    COMET

    2000-09-29

    This is part of the Physical Processes Professional Competency Unit of the Forecasting Low-Altitude Clouds and Fog for Aviation Operations Professional Development Series. West Coast Fog discusses the climatology, physical processes, and evolution of hot spell fogs along the U.S. West Coast.

  6. Video analysis of the escape flight of Pileated Woodpecker Dryocopus pileatus: does the Ivory-billed Woodpecker Campephilus principalis persist in continental North America?

    Microsoft Academic Search

    J Martin Collinson

    2007-01-01

    BACKGROUND: The apparent rediscovery of the Ivory-billed Woodpecker Campephilus principalis in Arkansas, USA, previously feared extinct, was supported by video evidence of a single bird in flight (Fitzpatrick et al, Science 2005, 308:1460–1462). Plumage patterns and wingbeat frequency of the putative Ivory-billed Woodpecker were said to be incompatible with the only possible confusion species native to the area, the Pileated

  7. Home-range size, habitat use, and reproduction of the Ivory-billed Woodcreeper (Xiphorhynchus flavigaster) in dry forest of western Mexico

    Microsoft Academic Search

    Jorge H. Vega River; Dalia Ayala; Carola A. Haas

    2003-01-01

    From March 1999 to August 2000, we used mist-netting, point counts, and radio-tracking to study habitat use, area requirements, and breeding of the Ivory-billed Woodcreeper Xiphorhynchus flavigaster in the tropical deciduous and semi-deciduous forest (arroyo forest) of the Chamela-Cuixmala Biosphere Reserve, western Mexico. The Ivory-billed Woodcreeper was a common, year-round resident. Breeding commenced at the end of the dry season

  8. COAST Arbeitspapier Study Programme

    E-print Network

    Damm, Werner

    general overview of careers in the field of Sustainability. Inhalt A. BackgroundDatum: Autoren: COAST Arbeitspapier 004 Study Programme Sustainable Development A Cross Programme Sustainable Development 1 Study Programme Sustainable Development A Cross-Cutting agenda

  9. LRB Steven Shapin: Ivory Trade http://www.lrb.co.uk/v25/n17/print/shap01_.html 1 of 17 2/4/2008 11:31 AM

    E-print Network

    Shapin, Steven

    LRB · Steven Shapin: Ivory Trade http://www.lrb.co.uk/v25/n17/print/shap01_.html 1 of 17 2/4/2008 11:31 AM LRB 11 September 2003 Steven Shapin screen layout tell a friend Ivory Trade Steven Shapin: Ivory Trade http://www.lrb.co.uk/v25/n17/print/shap01_.html 2 of 17 2/4/2008 11:31 AM headquarters

  10. Multi-component diffusion between molten SiO2 inclusions and surrounding felsic melt in an indochinite: Tektites as natural laboratories

    NASA Astrophysics Data System (ADS)

    Macris, C. A.; Eiler, J. M.; Asimow, P. D.; Stolper, E. M.

    2013-12-01

    Tektites are natural glasses thought to have formed as a result of melting and quenching of distally ejected terrestrial material upon hypervelocity (>11 km/s) impact on Earth. Some tektites contain inclusions of lechatelierite (nearly pure SiO2 glass; 99-100 wt. % SiO2), generally thought to be the amorphous relicts of partially digested quartz grains (Koeberl, 1994). Electron and ion microprobe analyses of major and minor elements were performed on transects between lechatelierite inclusions and the surrounding felsic glass in an indochinite (sample from Newman et al., 1995). The surrounding glass is peraluminous with an average composition of 73.4 wt.% SiO2, 12.8 wt.% Al2O3, 4.5 wt. % FeO, 2.3 wt.% K2O, and < 2 wt.% (each) CaO, MgO, Na2O, and TiO2. The boundary between the lechatelierite and felsic glass is broad (~30 ?m), with complex concentration profiles reflecting diffusion between the two melts at high temperatures (>2200 °C for formation of lechatelierite; Bunch et al., 2012) prior to quenching. Although all components except SiO2 are pinned to near zero at the same point at the lechatelierite end of the profiles, the shapes of the oxide concentration profiles differ, with Ca and Mg falling off from their far-field values first, followed in order by Fe, Ti, Al, Na, and K. K has apparently propagated the longest distance, diffusing faster than other components from the surrounding melt toward the lechatelierite. Furthermore, concentration profiles of K2O systematically increase, reach a maximum, then decrease closest to lechatelierite, indicating uphill diffusion of K against its concentration gradient. All concentration profiles are asymmetric, becoming steepest towards the most silicic portions of the interdiffusion zone approaching lechatelierite, likely due to the sharp compositional contrast between matrix glass and inclusions. Sato (1974) observed similar alkali enrichment in coronas around quartz xenocrysts in basalt and andesite, where K, and to a lesser degree Na, diffused against their concentration gradients. The uphill diffusion of alkalis in corona glass surrounding quartz was interpreted by Sato (1974) with a diffusion model assuming non-ideality of alkali elements in silicate melt, in which diffusion occurs according to the chemical potential gradient of each species. Preliminary calculations using the MELTS (Ghiorso and Sack, 1995) activity-composition model to transform the composition profiles across lechatelierite and felsic glass into chemical potential profiles (at 2200 °C) indicate that all components, including K2O, diffuse down their own chemical potential gradients. We will investigate these phenomena further in attempt to model the observed profiles. A deeper understanding of this problem may inform the factors controlling diffusion coefficients in silicate melts derived from crustal material, as well as the thermal histories of tektites. Bunch T.E. et al. (2012) P NATL ACAD SCI 109:1903-1912 Ghiorso M.S., Sack R.O. (1995) CONTRIB MINERAL PETR 119:197-212 Koeberl C. (1994) GEOL S AM S 133-151 Newman S. et al. (1995) LPS XXVI 26:1039-1040 Sato H. (1974) CONTRIB MINERAL PETROL 50:49-64

  11. West Coast Poverty Center

    NSDL National Science Digital Library

    Based at the University of Washington, the West Coast Poverty Center "serves as a hub for research, education, and policy analysis leading to greater understanding of the causes and consequences of poverty and effective approaches to reducing it in the west coast states." The Center was created in the fall of 2005, and it represents a collaborative venture between the UW School of Social Work, the Daniel J. Evans School of Public Affairs, and the College of Arts and Sciences. Scholars and others will find the site quite useful, and they may wish to start at the "Poverty Basics" section. This area includes helpful overviews like "How Many People Are Poor in the United States?" and interactive maps and charts that document the state of poverty levels on the West Coast. Moving on, the "Research" area contains links to papers, research briefs, and information about upcoming events sponsored by the Center.

  12. Office of Coast Survey

    NSDL National Science Digital Library

    The Office of Coast Survey (OCS) within the National Oceanic and Atmospheric Administration -- founded in 1807 by Thomas Jefferson -- is responsible for producing nautical charts for all the waters of the US and its territories. The OCS home page offers anyone in need of nautical maps lots of well-maintained and timely resources. Historical charts (from the 1700s onward), information on wreck and other dangerous obstructions, OCS's Coast Pilot publications, and Print on Demand sale of the most up-to-date charts and maps all are available here. This is a very useful resource for both commercial or recreational mariners in need of nautical maps.

  13. Gulf Coast Wetlands

    Atmospheric Science Data Center

    2014-05-15

    article title:  Wetlands of the Gulf Coast     ... coastal areas of four states along the Gulf of Mexico: Louisiana, Mississippi, Alabama and part of the Florida panhandle. The images ... web of estuarine channels and extensive coastal wetlands that provide important habitat for fisheries. The city of New Orleans ...

  14. Greenland: Full West Coast

    NSDL National Science Digital Library

    Lori Perkins

    2000-06-25

    This animation shows the ice concentration in Greenland. The ice has decreased significantly (~50 cm-year) along the coast and increased slightly in the center (+2 cm-year). Researchers view this as yet another serious warning sign of the threat of global warming.

  15. Greenland full west coast

    NSDL National Science Digital Library

    Lori Perkins

    2000-06-25

    This animation shows the ice concentration in Greenland. The ice has decreased significantly (~50 cm-year) along the coast and increased slightly in the center (+2 cm-year). Researchers view this as yet another serious warning sign of the threat of global warming.

  16. Coast Salish Canoe Journey

    USGS Multimedia Gallery

    Coast Salish Canoe Journey 2009 landing in Pillar Point, WA.  Each year Northwest Indian tribes collaborate with USGS to measure salinity, temperature, pH, and dissolved oxygen in the Salish Sea.  The Swinomish Tribe was recently awarded national recognition for their leadership in buildin...

  17. Northwest Coast Indian Art.

    ERIC Educational Resources Information Center

    Manning, Thomas; Knecht, Elizabeth

    The visual art forms of the Northwest Coast Indian Tribes of Alaska (Haida, Tlingit, and Tsimshian) share common distinctive design elements (formline, ovoid, U-form, and curvilinear shapes) which are referred to as the "Northern Style." Designs represent events or characters taken from the oral tradition of song and legend. Characteristics of…

  18. Coast Guard Firefighting Module

    NASA Technical Reports Server (NTRS)

    1977-01-01

    NASA and the U.S. Coast Guard are jointly developing a lightweight, helicopter-transportable, completely self-contained firefighting module for combating shipboard and dockside fires. The project draws upon NASA technology in high-capacity rocket engine pumps, lightweight materials and compact packaging.

  19. Honduras: Caribbean Coast

    Microsoft Academic Search

    Alastair R. Harborne; Daniel C. Afzal; Mark J. Andrews

    2001-01-01

    The coast of Honduras, Central America, represents the southern end of the Mesoamerican Barrier Reef System, although its marine resources are less extensive and studied than nearby Belize and Mexico. However, the coastal zone contains mainland reef formations, mangroves, wetlands, seagrass beds and extensive fringing reefs around its offshore islands, and has a key role in the economy of the

  20. Video analysis of the escape flight of Pileated Woodpecker Dryocopus pileatus: does the Ivory-billed Woodpecker Campephilus principalis persist in continental North America?

    PubMed Central

    Collinson, J Martin

    2007-01-01

    Background The apparent rediscovery of the Ivory-billed Woodpecker Campephilus principalis in Arkansas, USA, previously feared extinct, was supported by video evidence of a single bird in flight (Fitzpatrick et al, Science 2005, 308:1460–1462). Plumage patterns and wingbeat frequency of the putative Ivory-billed Woodpecker were said to be incompatible with the only possible confusion species native to the area, the Pileated Woodpecker Dryocopus pileatus. Results New video analysis of Pileated Woodpeckers in escape flights comparable to that of the putative Ivory-billed Woodpecker filmed in Arkansas shows that Pileated Woodpeckers can display a wingbeat frequency equivalent to that of the Arkansas bird during escape flight. The critical frames from the Arkansas video that were used to identify the bird as an Ivory-billed Woodpecker are shown to be equally, or more, compatible with the Pileated Woodpecker. Conclusion The identification of the bird filmed in Arkansas in April 2004 as an Ivory-billed Woodpecker is best regarded as unsafe. The similarities between the Arkansas bird and known Pileated Woodpeckers suggest that it was most likely a Pileated Woodpecker. PMID:17362504

  1. African elephants show high levels of interest in the skulls and ivory of their own species

    PubMed Central

    McComb, Karen; Baker, Lucy; Moss, Cynthia

    2005-01-01

    An important area of biology involves investigating the origins in animals of traits that are thought of as uniquely human. One way that humans appear unique is in the importance they attach to the dead bodies of other humans, particularly those of their close kin, and the rituals that they have developed for burying them. In contrast, most animals appear to show only limited interest in the carcasses or associated remains of dead individuals of their own species. African elephants (Loxodonta africana) are unusual in that they not only give dramatic reactions to the dead bodies of other elephants, but are also reported to systematically investigate elephant bones and tusks that they encounter, and it has sometimes been suggested that they visit the bones of relatives. Here, we use systematic presentations of object arrays to demonstrate that African elephants show higher levels of interest in elephant skulls and ivory than in natural objects or the skulls of other large terrestrial mammals. However, they do not appear to specifically select the skulls of their own relatives for investigation so that visits to dead relatives probably result from a more general attraction to elephant remains. PMID:17148317

  2. The Skin Ivory Spot. A Possible Indicator for Skinfield Photo-Carcinogenesis in Recreational Sunbed Addicts

    PubMed Central

    Quatresooz, Pascale; Piérard-Franchimont, Claudine; Piérard, Gérald E.

    2012-01-01

    Introduction: For a decade or so, artificial sources of restricted light wavelengths, particularly sunbeds, have progressively gained popularity among adolescents and young adults. Warnings were raised focusing on the risk of accelerated photoaging and photocarcinogenesis. The ULEV (ultraviolet light-enhanced visualization) method is a convenient noninvasive way identifying subtle pigmentary changes presenting as a mottled subclinical melanoderma (MSM). Of note, rare spotty amelanotic macules presenting as skin ivory spots (SIS) was reported on any part of the body. Subjects and method: This work is the first attempt at evaluating the changes in the MSM and SIS spots developed on the skin of 33 phototype III young women designated as avid users involved in frequent exposures to sunshine and sunbeds for lifestyle purposes for a duration of at least 120 months. Results: MSM was markedly heterogeneous and was distinctly obvious in the majority of adepts of frequent natural and artificial photoexposures. SIS was particularly developed in subjects presenting with severe MSM patterns. Discussion: MSM and SIS are more severe in subjects frequently exposed to sunbeds and sun exposures. These signs possibly represent a risk marker for field photocarcinogenesis. PMID:22470297

  3. Mapping Potential Ivory Billed Woodpecker Habitat using Lidar and Hyperspectral Data Fusion

    NASA Astrophysics Data System (ADS)

    Swatantran, A.; Dubayah, R.; Hofton, M.; Blair, J. B.; Handley, L.

    2008-12-01

    Multisensor fusion is a powerful approach towards characterizing forest structure for effective management of wildlife habitats. The rediscovery of the Ivory Billed Woodpecker in 2005 reinforced the need to map and conserve suitable habitat for the previously thought extinct bird. In this study we fused waveform lidar and hyperspectral data to map potential habitat for the woodpecker along the Lower Mississippi Valley of Arkansas. Laser Vegetation Imaging Sensor (LVIS) data was processed to produce high-resolution forest structure maps. We used multiple endmember spectral mixture analysis (MESMA) to map stressed and dead vegetation from the Airborne Visible Infrared Imaging Spectrometer (AVIRIS) data. LVIS and AVIRIS maps were fused to identify habitat hot-spots based on historical records of habitat preferences of the bird. Results indicate several small hotspots in the bottomland hardwood forests, but very few large and continuous patches qualify as potential woodpecker habitat. Results from this study are expected to aid search efforts for the woodpecker and also provide useful insights into lidar fusion for large scale habitat mapping.

  4. Methodological aspects of the white-ivory assay of Drosophila melanogaster.

    PubMed

    Ferreiro, J A; Sierra, L M; Comendador, M A

    1995-10-01

    The white-ivory somatic assay of Drosophila melanogaster was developed to detect genotoxic agents which induce loss of a tandem duplication. Although the mechanism of this loss is not known, some suggestions point to intrachromosomal recombination as the main reversion mechanism. Since the few papers published to date on this assay present controversial methodologies, prior to a larger study of chemicals with different mechanisms of action, we have carried out an analysis to optimize some conditions of this assay. For this purpose, we have used three different strains and four well characterized mutagenic chemicals: N-ethyl-N-nitrosourea (ENU), methyl methanesulfonate (MMS), ethyl methanesulfonate (EMS) and hexamethyl phosphoramide (HMPA). The results obtained allow us to conclude that: (i) the best strain for this assay is C(1)DX,y,f/Dp(1:1:1:1)wi,y2, although the use of strain FM6,l(1)66a/Dp(1:1:1:1)wi,y2;st/st could be considered for some mechanistical studies; (ii) developmental reasons make it necessary to use as estimate of reversion frequency the proportion of eyes showing at least one spot; (iii) reversion frequency cannot be used as estimate of mutation efficiency, neither can spot size evaluate time of spot induction; (iv) the four chemicals clearly induce loss of the wi duplication; according to their activities they rank ENU > HMPA > MMS approximately EMS. PMID:7477046

  5. West Coast Chlorophyll Bloom

    NSDL National Science Digital Library

    Lori Perkins

    2002-10-15

    Sea-viewing Wide Field-of-view Sensor (SeaWiFS) on board the Orbview 2 satellite captured the phytoplankton bloom October 6, 2002 . Red represents high concentration of chlorophyll, follow by orange, yellow and green. Land and cloud portions of the image are presented in natural color. SeaWiFS monitors ocean plant life by measuring the amount of chlorophyll in the ocean. Large phytoplankton blooms tend to coincide with natural phenomena that drive that nutrient-rich water to the surface. The process is called upwelling. Winds coming off principal land masses push surface layers of water away from the shore. Into the resulting wind-driven void deeper water underneath the surface layers rushes in toward the coast, bringing with it nutrients for life to bloom. This upwelling fuel the growth of marine phytoplankton which, along with larger seaweeds, nourishes the incredible diversity of creatures found along the northern and central California coast.

  6. OzCoasts

    NSDL National Science Digital Library

    Those persons with a penchant for public policy, coastal erosion, and estuaries will sing the praises of the OzCoasts website. Formally launched in 2008, OzCoasts represents a collaborative effort between more than 100 coastal scientists from a range of government agencies and universities across Australia. The materials on the site are divided into six primary areas, including "Coastal Indicators", "Habitat Mapping", and "Landform & Stability Maps". Within each section, visitors will find graphs, maps, charts, and short essays that document a wide range of natural and man-made phenomena including beach erosion, beach geomorphic models, and sea level rise. Visitors can also make their way to the "Glossary" area to get caught up relevant terms and then wander around the "What's New" area for the latest and greatest updates to the website.

  7. Mapping The Pacific Coast

    NSDL National Science Digital Library

    Maps of the Pacific Coast from the earliest period of European exploration continue to interest cartographers, geographers, and antiquarians. The maps in the Quivira Collection date from 1540 to 1802 and include early depictions of California as an island, Russian cartographic interpretations of the Pacific Coast, and overland maps across the continent westward to the ocean. All told, this online collection includes forty-five maps, books, and illustrations organized into six thematic galleries. Visitors can start by listening to an audio introduction, and then look around through the thematic galleries, which include such intriguing headings as " In the Wake of Captain James Cook" and "Secret Russian Explorations in the Pacific". Of course, visitors must click their way into the "California as an Island" section, if not just for a taste of six examples of what is perhaps one of the best-known cartographic mistakes in the world.

  8. The Case of the Ivory-Billed Woodpecker: The Scientific Process and How it Relates to Everyday Life

    NSDL National Science Digital Library

    Jennifer Merriam

    2007-09-01

    In this case study, based on the reported rediscovery of the Ivory-billed Woodpecker in April 2005, students examine a real-world example of the scientific process and explore the practical implications of their conclusions. The case tells the story of Brad Murky, a student and research assistant who must decide whether the available evidence is sufficient for him to accept the bird's existence. In a series of e-mails, Brad and his sister debate the evidence, and Brad is left to wonder whether the press conference called to announce the rediscovery of the bird has been scheduled in haste.

  9. Impact of Tributyltin and Triphenyltin on Ivory Shell (Babylonia japonica) Populations

    PubMed Central

    Horiguchi, Toshihiro; Kojima, Mitsuhiro; Hamada, Fumihiko; Kajikawa, Akira; Shiraishi, Hiroaki; Morita, Masatoshi; Shimizu, Makoto

    2006-01-01

    We histopathologically examined gonads and chemically determined organotin compounds in tissues of the ivory shell, Babylonia japonica. Imposex (a superimposition of male-type genital organs on females) occurred in approximately 80–90% of B. japonica specimens that we examined, with the penis and vas deferens both well developed. No oviduct blockage by vas deferens formation was observed. Ovarian spermatogenesis and suppressed ovarian maturation were observed in the females that exhibited imposex, although no histopathological abnormalities were found in males. Tissue distributions of organotin compounds [tributyltin (TBT), triphenyltin (TPhT), and their metabolites] were different for butyltins and phenyltins; a remarkably high accumulation of TBT was observed in the ctenidium, osphradium, and heart, whereas high concentrations of TPhT were detected in the ovary and digestive gland. More than one-third of TBT accumulated in the digestive glands of both males and females, followed by the testis, ctenidium, muscle, and heart tissues in males and in the muscle, ovary, ctenidium, and head tissues (including the central nervous system ganglia) in females. In both males and females, more than half of total TPhT accumulated in the digestive glands, followed by the gonads. The next highest values were in the muscle, ctenidium, and heart tissues in males and in the muscle, oviduct, and head tissues in females. Both TBT and TPhT concentrations in the gonads were positively correlated with penis length in females. Our findings strongly suggest that reproductive failure in adult females accompanied by imposex, possibly induced by TBT and TPhT from antifouling paints, may have caused the marked decline of B. japonica populations in Japan. PMID:16818241

  10. East Coast -Suez Canal 15 East Coast -Strait of Hormuz 24

    E-print Network

    Bases Places Crossroads East Coast - Suez Canal 15 East Coast - Strait of Hormuz 24 East Coast deployed (Avg Last 90 Days) 8 Sep 14 ~190 ships #12;Bases Places Crossroads East Coast - Suez Canal 15 East

  11. The Red Light in the Ivory Tower: Contexts and Implications of Entrepreneurial Education. Counterpoints: Studies in the Postmodern Theory of Education. Volume 401

    ERIC Educational Resources Information Center

    Breault, Donna Adair; Callejo Perez, David M.

    2012-01-01

    "The Red Light in the Ivory Tower: Contexts and Implications of Entrepreneurial Education" critically analyzes the operational behaviors of prestigious and prestige-seeking universities, particularly within the context of budget shortfalls and increasing competition. The book challenges entrepreneurial activities within universities by exploring…

  12. Non-invasive quantitative micro-PIXE-RBS/EBS/EBS imaging reveals the lost polychromy and gilding of the Neo-Assyrian ivories from the Louvre collection.

    PubMed

    Albéric, Marie; Müller, Katharina; Pichon, Laurent; Lemasson, Quentin; Moignard, Brice; Pacheco, Claire; Fontan, Elisabeth; Reiche, Ina

    2015-05-01

    Antique objects are known to have been brightly colored. However, the appearance of these objects has changed over time and paint traces are rarely preserved. The surface of ivory objects (8th century B.C., Syria) from the Louvre museum collection (Paris) have been non-invasively studied by simultaneous particle-induced X-ray emission (PIXE) and Rutherford and elastic backscattering spectrometry (RBS/EBS) micro-imaging at the AGLAE facility (C2RMF, Paris). Qualitative 2D chemical images of elements ranging from Na to Pb on the surface of the ancient ivory carvings provide evidence of lost polychromy and gilding. Quantitative PIXE data of specific areas allow discrimination between traces of sediments and former polychromy. Different shades of blue can be differentiated from particular Pb/Cu ratios. The characterization of gilding based on RBS data demonstrates the exceptional technological skills of the Phoenician craftsmen supposed to have carved the Arslan Tash ivories. More precise reconstructions of the original polychromy compared to previous studies and a criterion for the authentication of ancient gilded ivory object are proposed. PMID:25770612

  13. North and South Carolina Coasts

    Microsoft Academic Search

    MICHAEL A. MALLIN; JOANN M. BURKHOLDER; LAWRENCE B. CAHOON; MARTIN H. POSEY

    2000-01-01

    This coastal region of North and South Carolina is a gently sloping plain, containing large riverine estuaries, sounds, lagoons, and salt marshes. The most striking feature is the large, enclosed sound known as the Albemarle–Pamlico Estuarine System, covering approximately 7530 km2. The coast also has numerous tidal creek estuaries ranging from 1 to 10 km in length. This coast has

  14. A "Freely Coasting" Universe

    E-print Network

    Savita Gehlaut; A. Mukherjee; S. Mahajan; D. Lohiya

    2002-12-09

    A strictly linear evolution of the cosmological scale factor is surprisingly an excellent fit to a host of cosmological observations. Any model that can support such a coasting presents itself as a falsifiable model as far as classical cosmological tests are concerned. This article discusses the concordance of such an evolution in relation to several standard observations. Such evolution is known to be comfortably concordant with the Hubble diagram as deduced from current supernovae 1a data, it passes constraints arising from the age and gravitational lensing statistics and just about clears basic constraints on nucleosynthesis. Such an evolution exhibits distinguishable and verifiable features for the recombination era. The overall viability of such models is discussed.

  15. The Economic Value of Breastfeeding (With Results from Research Conducted in Ghana and the Ivory Coast). Cornell International Nutrition Monograph Series Number 6.

    ERIC Educational Resources Information Center

    Greiner, Ted; And Others

    This monograph focuses attention on economic considerations related to infant feeding practices in developing countries. By enlarging on previous methodologies, this paper proposes to improve the accuracy of past estimates of the economic value of human milk, or more specifically, the practice of breastfeeding. The theoretical model employed…

  16. Emissions and concentrations of hydrogen sulfide in the air of the tropical forest of the Ivory Coast and of temperate regions in France

    Microsoft Academic Search

    Robert Delmas; Jean Baudet; Jean Servant; Yves Baziard

    1980-01-01

    Atmospheric H2S was measured by a fluorometric method (sensitivity 10 ng). In France, for aerated soils the emissions were between 0.8 and 27 mug m-2 h-1 H2S (average 5 mug m-2 h-1). The soil temperature is an important factor governing this emission. The H2S concentrations in the air ranged from 0.017 to 0.17 mug m-3 (average 0.080 mug m-3). In

  17. Characterization of weathering profile in granites and volcanosedimentary rocks in West Africa under humid tropical climate conditions. Case of the Dimbokro Catchment (Ivory Coast)

    NASA Astrophysics Data System (ADS)

    Koita, M.; Jourde, H.; Koffi, K. J. P.; da Silveira, K. S.; Biaou, A.

    2013-06-01

    In granitic rocks, various models of weathering profile have been proposed, but never for the hard rocks of West Africa. Besides, in the literature there is no description of the weathering profile in volcanosedimentrary rocks. Therefore, we propose three models describing the weathering profiles in granites, metasediments, and volcanic rocks for hard rock formations located in West Africa. For each of these models proposed for granitic and volcanosedimentary rocks of the Dimbokro catchment, vertical layered weathering profiles are described, according to the various weathering and erosion cycles (specific to West Africa) that the geological formations of the Dimbokro catchment experienced from the Eocene to the recent Quaternary period. The characterization of weathering profiles is based on: i) bedrocks and weathering profile observations at outcrop, and ii) interpretation and synthesis of geophysical data and lithologs from different boreholes. For each of the geological formations (granites, metasediments, and volcanic rocks), their related weathering profile model depicted from top to bottom comprises four separate layers: alloterite, isalterite, fissured layer, and fractured fresh basement. These weathering profiles are systematically covered by a soil layer. Though granites, metasediments and volcanic rocks of the Dimbokro catchment experience the same weathering and erosion cycles during the palaeoclimatic fluctuations from Eocene to recent Quaternary period, they exhibit differences in thickness. In granites, the weathering profile is relatively thin due to the absence of iron crust which protects weathering products against dismantling. In metasediments and volcanic rocks iron crusts develop better than in granites; in these rocks the alterite are more resistant to dismantling.

  18. Princess Astrid Coast, Antarctica

    NASA Technical Reports Server (NTRS)

    2002-01-01

    The continent of Antarctica is almost completely covered by a thick blanket of ice, punctuated only by steep mountain peaks and a handful of dry valleys. Antarctica is also ringed by a permanent ice shelf, and that is surrounded by seasonal sea ice. The image above, acquired by the Moderate-resolution Imaging Spectroradiometer (MODIS) on September 26, 2001, shows many of the types of ice found in Antarctica. At the bottom of the image is the ice of the continental glacier, which is up to 4,000 meters thick in the interior. These thick glaciers are held in place by coastal mountain ranges. Some ice does flow through the mountains, spilling onto the relatively flat land of the Princess Astrid Coast. Cold air also spills over the mountains, creating very strong and persistent 'katabatic' winds. These scour the snow off the tops of the glaciers, leaving pale blue patches of bare ice. Above the coastline is the ice shelf, which is much smoother. There, glacial ice actually floats on the sea surface. Beyond that is the chaotic surface of the sea ice, which has been solidifying all winter long. Credit: Jacques Descloitres, MODIS Land Rapid Response Team, NASA/GSFC

  19. Andrew spares Florida Coast

    NASA Astrophysics Data System (ADS)

    Bush, Susan

    When geologists heard of the intensity of Hurricane Andrew, which struck the Florida coast on August 25 and then moved on to southern Louisiana, they were expecting the same kinds of coastal damage that Hurricane Hugo brought to the Caribbean and Carolina shores in 1989. Both storms were category 4 hurricanes, having winds of 131-155 mph and surges of 13-18 feet. However, the coastal damage never materialized, leaving geologists to analyze the factors that lessened the impact of the storm. “For minimum coastal damage, you couldn't have designed a better storm,” said Orrin Pilkey, director of the Program for the Study of Developed Shorelines (PSDS) in Durham, N.C. This was due in part to the nature of the storm itself and where it hit land, and in part to the regional geology, said Rob Thieler of PSDS. Despite the huge amounts of damage to buildings, there was virtually no evidence of coastal process destruction, he said.

  20. 76 FR 57945 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Notice of Availability for...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-19

    ...Fisheries Off West Coast States; West Coast Salmon Fisheries; Notice of Availability for Amendment 16 to the Salmon Fishery Management Plan AGENCY: National...submitted Amendment 16 to the Pacific Coast Salmon Fishery Management Plan (FMP) for...

  1. 77 FR 58930 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Announcing OMB Approval of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-25

    ...Fisheries Off West Coast States; West Coast Salmon Fisheries; Announcing OMB Approval of...CONTACT: Peggy Mundy, Northwest Region Salmon Management Division, NMFS, 206-526-4323...regulatory areas in the commercial ocean salmon fishery off the coasts of...

  2. 77 FR 67327 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Notice of Availability for...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-09

    ...Fisheries Off West Coast States; West Coast Salmon Fisheries; Notice of Availability for Amendment 17 to the Salmon Fishery Management Plan AGENCY: National...transmitted Amendment 17 to the Pacific Coast Salmon Fishery Management Plan (FMP) for...

  3. Honduras: Caribbean Coast.

    PubMed

    Harborne, A R; Afzal, D C; Andrews, M J

    2001-12-01

    The coast of Honduras, Central America, represents the southern end of the Mesoamerican Barrier Reef System, although its marine resources are less extensive and studied than nearby Belize and Mexico. However, the coastal zone contains mainland reef formations, mangroves, wetlands, seagrass beds and extensive fringing reefs around its offshore islands, and has a key role in the economy of the country. Like most tropical areas, this complex of benthic habitats experiences limited annual variation in climatic and oceanographic conditions but seasonal and occasional conditions, particularly coral bleaching and hurricanes, are important influences. The effects of stochastic factors on the country's coral reefs were clearly demonstrated during 1998 when Honduras experienced a major hurricane and bleaching event. Any natural or anthropogenic impacts on reef health will inevitably affect other countries in Latin America, and vice versa, since the marine resources are linked via currents and the functioning of the system transcends political boundaries. Much further work on, for example, movement of larvae and transfer of pollutants is required to delineate the full extent of these links. Anthropogenic impacts, largely driven by the increasing population and proportion of people living in coastal areas, are numerous and include key factors such as agricultural run-off, over-fishing, urban and industrial pollution (particularly sewage) and infrastructure development. Many of these threats act synergistically and, for example, poor watershed management via shifting cultivation, increases sedimentation and pesticide run-off onto coral reefs, which increases stress to corals already affected by decreasing water quality and coral bleaching. Threats from agriculture and fishing are particularly significant because of the size of both industries. The desire to generate urgently required revenue within Honduras has also led to increased tourism which provides an overarching stress to marine resources since most tourists spend time in the coastal zone. Hence the last decade has seen a dramatic increase in coastal development, a greater requirement for sewage treatment and more demand for freshwater, particularly in the Bay Islands. Although coastal zone management is relatively recent in Honduras, it is gaining momentum from both large-scale initiatives, such as the Ministry of Tourism's 'Bay Islands Environmental Management Project', and national and international NGO projects. For example, a series of marine protected areas and legislative regulations have been established, but management capacity, enforcement and monitoring are limited by funding, expertise and training. Existing and future initiatives, supported by increased political will and environmental awareness of stakeholders, are vital for the long-term economic development of the country. PMID:11827108

  4. Bryan Coast, English Coast, Alexander Island, Fallieres Coast, and Bellingshausen Sea, Antarctica

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This image of Antarctica shows the Bryan Coast (lower left), the English Coast (lower central), Alexander Island (middle right), the Fallieres Coast (top right), and the Bellingshausen Sea. The entire continent has been dedicated to peaceful scientific investigation since 1961, with the signing of the Antarctic Treaty.The waters surrounding Antarctica are intensely cold. Salt water freezes at -2C, allowing sea ice to form. The middle left portion of the image shows quite a lot of sea ice in the Bellingshausen Sea. During the Antarctic winter, when data for this image was acquired, Antarctica doubles in size to about 28.5 million square km (or about 11 million square miles), and temperatures in the -60C range are common.This true-color image was compiled from MODIS data gathered March 29, 2002. Credit: Jacques Descloitres, MODIS Land Rapid Response Team, NASA/GSFC

  5. 33 CFR 52.42 - Views of the Coast Guard.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Views of the Coast Guard. 52.42 Section 52.42 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...CORRECTION OF MILITARY RECORDS OF THE COAST GUARD Submissions by the Coast...

  6. Tsunami risk along Vietnamese coast

    Microsoft Academic Search

    Vu Thanh Ca; Nguyen Dinh Xuyen

    2008-01-01

    Results of the analysis of field survey data and historic literature documents in Vietnam reveal that there is evident of past tsunami attacking Vietnamese coast. However, the evident is still not strong enough to confirm the occurrence of past tsunami events in Vietnam. On the other hand, results of preliminary paleo- tsunami study also show that there are possibilities of

  7. ZOOPLANKTON VOLUMES OFF THE PACIFIC COAST, 1956

    E-print Network

    ZOOPLANKTON VOLUMES OFF THE PACIFIC COAST, 1956 Marine Biological Laboratory JAN(i -1958 WOODS HOLE Washingtcxi, D. C» October 1957 #12;Abstract Basic data on volumes of zooplankton off the Pacific coast zooplankton abun- dance by month are included. #12;Zooplankton Volumes off the Pacific Coast, I956 The six

  8. BPW HIBISCUS COAST (Business & Professional Women)

    E-print Network

    Auckland, University of

    BPW HIBISCUS COAST (Business & Professional Women) $2000 STUDY AWARD Year 2012 Awarded to a female student who is a past or present Hibiscus Coast Resident, who has completed at least one full year HIBISCUS COAST ~ PO Box 321, Silverdale 0944 $2000 STUDY AWARD YEAR 2012 CONDITIONS AND CRITERIA 1

  9. Resource wars and conflict ivory: the impact of civil conflict on elephants in the Democratic Republic of Congo--the case of the Okapi Reserve.

    PubMed

    Beyers, Rene L; Hart, John A; Sinclair, Anthony R E; Grossmann, Falk; Klinkenberg, Brian; Dino, Simeon

    2011-01-01

    Human conflict generally has substantial negative impacts on wildlife and conservation. The recent civil war (1995-2006) in the Democratic Republic of Congo (DRC) resulted in a significant loss of wildlife, including elephants, due to institutional collapse, lawlessness and unbridled exploitation of natural resources such as minerals, wood, ivory and bushmeat. We used data from distance sampling surveys conducted before and after the war in a protected forest, the Okapi Faunal Reserve, to document changes in elephant abundance and distribution. We employed Generalized Additive Models to relate changes in elephant distribution to human and environmental factors. Populations declined by nearly fifty percent coinciding with a major increase in elephant poaching as indicated by reports of ivory trade during the war. Our results suggest that humans influenced elephant distribution far more than habitat, both before and after the war, but post-war models explained more of the variation. Elephant abundance declined more, closer to the park boundary and to areas of intense human activity. After the war, elephant densities were relatively higher in the centre of the park where they were better protected, suggesting that this area may have acted as a refuge. In other sites in Eastern DRC, where no protection was provided, elephants were even more decimated. Post-war dynamics, such as weakened institutions, human movements and availability of weapons, continue to affect elephants. Survival of remaining populations and recovery will be determined by these persistent factors and by new threats associated with growing human populations and exploitation of natural resources. Prioritizing wildlife protection, curbing illegal trade in ivory and bushmeat, and strengthening national institutions and organizations in charge of conservation will be crucial to counter these threats. PMID:22096529

  10. Resource Wars and Conflict Ivory: The Impact of Civil Conflict on Elephants in the Democratic Republic of Congo - The Case of the Okapi Reserve

    PubMed Central

    Beyers, Rene L.; Hart, John A.; Sinclair, Anthony R. E.; Grossmann, Falk; Klinkenberg, Brian; Dino, Simeon

    2011-01-01

    Human conflict generally has substantial negative impacts on wildlife and conservation. The recent civil war (1995-2006) in the Democratic Republic of Congo (DRC) resulted in a significant loss of wildlife, including elephants, due to institutional collapse, lawlessness and unbridled exploitation of natural resources such as minerals, wood, ivory and bushmeat. We used data from distance sampling surveys conducted before and after the war in a protected forest, the Okapi Faunal Reserve, to document changes in elephant abundance and distribution. We employed Generalized Additive Models to relate changes in elephant distribution to human and environmental factors. Populations declined by nearly fifty percent coinciding with a major increase in elephant poaching as indicated by reports of ivory trade during the war. Our results suggest that humans influenced elephant distribution far more than habitat, both before and after the war, but post-war models explained more of the variation. Elephant abundance declined more, closer to the park boundary and to areas of intense human activity. After the war, elephant densities were relatively higher in the centre of the park where they were better protected, suggesting that this area may have acted as a refuge. In other sites in Eastern DRC, where no protection was provided, elephants were even more decimated. Post-war dynamics, such as weakened institutions, human movements and availability of weapons, continue to affect elephants. Survival of remaining populations and recovery will be determined by these persistent factors and by new threats associated with growing human populations and exploitation of natural resources. Prioritizing wildlife protection, curbing illegal trade in ivory and bushmeat, and strengthening national institutions and organizations in charge of conservation will be crucial to counter these threats. PMID:22096529

  11. Red Tide off Texas Coast

    NASA Technical Reports Server (NTRS)

    2002-01-01

    Red tides (algae) bloomed late this summer along a 300-mile stretch of Texas' Gulf Coast, killing millions of fish and shellfish as well as making some people sick. State officials are calling this the worst red tide bloom in 14 years. The algae produces a poison that paralyzes fish and prevents them from breathing. There is concern that the deadly algae could impact or even wipe out this year's oyster harvest in Texas, which usually peaks during the Thanksgiving and Christmas holidays. The red tides were first observed off the Texas coast in mid-August and have been growing steadily in size ever since. Red tides tend to bloom and subside rapidly, depending upon changes in wind speed and direction, water temperature, salinity, and rainfall patterns (as the algae doesn't do as well in fresher water). This true-color image of the Texas Gulf Coast was acquired on September 29, 2000, by the Moderate-resolution Imaging Spectroradiometer (MODIS) flying aboard NASA's Terra spacecraft. The red tide can be seen as the dark reddish discoloration in the ocean running southwest to northeast along the coast. In this scene, the bloom appears to be concentrated north and east of Corpus Christi, just off Matagorda Island. The image was made at 500-meter resolution using a combination of MODIS' visible bands 1 (red), 4 (green), and 3 (blue). The city of Houston can be seen clearly as the large, greyish cluster of pixels to the north and west of Galveston Bay, which is about mid-way up the coastline in this image. Also visible in this image are plumes of smoke, perhaps wildfires, both to the north and northeast of Houston. For more information about red tides, refer to the Texas Red Tide Web site. Image courtesy Andrey Savtchenko, MODIS Data Support Team, and the MODIS Ocean Team, NASA's Goddard Space Flight Center

  12. Horticultural Survey of Gulf Coast.

    E-print Network

    Green, Edward C.

    1907-01-01

    TEXAS AGRICULTURAL EXPERIMENT STATIONS. - -- - - -- - BULLETIN NO. 94. HorticuIturaI Section, March, 1907. Horticultural Survey of Gulf Coast By Edward C. Green Setting Bermuda Onions POSTOFFICE COLLEGE STATION, BRAZOS COUNTY, TEXAS. r... which is most beneficial to the new lard. As to the crops for the various localities visited, the successful truckers list them, in order of profitableness and certainty, about as follows: Corpus Christi. -lst, cabbage; 2nd, cucumbers; 3rd, onions; 4...

  13. "Through his indomitable spirit, outstanding work ethic, integrity and perseverance, LCdr Wong . . .

    E-print Network

    of service as an officer in the Canadian Forces Advised U.N. Missions to Ivory Coast, Liberia, and Sudan affairs officer covering a broad geographic range of operations including UN Missions to the Ivory Coast

  14. 76 FR 32876 - Fisheries Off West Coast States; West Coast Salmon Fisheries; 2011 Management Measures; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-07

    ...Fisheries Off West Coast States; West Coast Salmon Fisheries; 2011 Management Measures...management measures for the 2011 ocean salmon fisheries off Washington, Oregon, and California and the 2012 salmon seasons opening earlier than May...

  15. 75 FR 24482 - Fisheries Off West Coast States; West Coast Salmon Fisheries; 2010 Management Measures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-05

    ...Fisheries Off West Coast States; West Coast Salmon Fisheries; 2010 Management Measures...management measures for the 2010 ocean salmon fisheries off Washington, Oregon, and California and the 2011 salmon seasons opening earlier than May...

  16. Real-time PCR detection and quantification of elephantid DNA: species identification for highly processed samples associated with the ivory trade.

    PubMed

    Wozney, Kristyne Michelle; Wilson, Paul J

    2012-06-10

    The ivory industry is the single most serious threat to global elephant populations. A highly sensitive, species-specific real-time PCR assay has been developed to detect and quantify African elephant (Loxodonta africana), Asian elephant (Elephas maximus) and Woolly Mammoth (Mammuthus primigenius) mitochondrial DNA from highly processed samples involved in the international ivory trade. This assay is especially useful for highly processed samples where there are no distinguishing morphological features to identify the species of origin. Using species-specific Taqman(®) probes targeting a region of the mitochondrial cytochrome b gene, we developed an assay that can be used to positively identify samples containing elephant or Woolly mammoth DNA faster and more cost-effectively than traditional sequencing methods. Furthermore, this assay provides a diagnostic result based on probe hybridization that eliminates ambiguities associated with traditional DNA sequence protocols involving low template DNA. The real-time method is highly sensitive, producing accurate and reproducible results in samples with as few as 100 copies of template DNA. This protocol can be applied to the enforcement of the Convention on the International Trade of Endangered Species (CITES), when positive identification of species from illegally traded products is required by conservation officers in wildlife forensic cases. PMID:22257967

  17. Rangewide Genetic Variation in Coast Redwood Populations at a Chloroplast

    E-print Network

    Standiford, Richard B.

    241 Rangewide Genetic Variation in Coast Redwood Populations at a Chloroplast Microsatellite Locus1 Chris Brinegar2 Abstract Old growth and second growth populations of coast redwood (Sequoia sempervirens drift. Key words: chloroplast microsatellite, coast redwood, genetic drift, Sequoia sempervirens

  18. 33 CFR 173.35 - Coast Guard validation sticker.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 false Coast Guard validation sticker. 173.35 Section 173...Numbering § 173.35 Coast Guard validation sticker. No person may operate...by the Coast Guard unless it has the validation sticker issued with the...

  19. 33 CFR 173.35 - Coast Guard validation sticker.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 false Coast Guard validation sticker. 173.35 Section 173...Numbering § 173.35 Coast Guard validation sticker. No person may operate...by the Coast Guard unless it has the validation sticker issued with the...

  20. 33 CFR 173.35 - Coast Guard validation sticker.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 false Coast Guard validation sticker. 173.35 Section 173...Numbering § 173.35 Coast Guard validation sticker. No person may operate...by the Coast Guard unless it has the validation sticker issued with the...

  1. 75 FR 79956 - Protection for Whistleblowers in the Coast Guard

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-21

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 53 [USCG-2009-0239] RIN 1625-AB33 Protection for Whistleblowers in the Coast Guard AGENCY: Coast Guard, DHS. ACTION: Direct final rule; request for...

  2. 33 CFR 23.10 - Coast Guard emblem.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...in full color is described as follows: White anchors and white ring all outlined in medium blue (Coast Guard blue), letters and numerals medium blue (Coast Guard blue), white area within ring, shield with medium blue (Coast Guard...

  3. 33 CFR 23.10 - Coast Guard emblem.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...in full color is described as follows: White anchors and white ring all outlined in medium blue (Coast Guard blue), letters and numerals medium blue (Coast Guard blue), white area within ring, shield with medium blue (Coast Guard...

  4. 33 CFR 23.10 - Coast Guard emblem.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...in full color is described as follows: White anchors and white ring all outlined in medium blue (Coast Guard blue), letters and numerals medium blue (Coast Guard blue), white area within ring, shield with medium blue (Coast Guard...

  5. 33 CFR 23.10 - Coast Guard emblem.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...in full color is described as follows: White anchors and white ring all outlined in medium blue (Coast Guard blue), letters and numerals medium blue (Coast Guard blue), white area within ring, shield with medium blue (Coast Guard...

  6. 33 CFR 23.10 - Coast Guard emblem.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...in full color is described as follows: White anchors and white ring all outlined in medium blue (Coast Guard blue), letters and numerals medium blue (Coast Guard blue), white area within ring, shield with medium blue (Coast Guard...

  7. 76 FR 66965 - Treasure Coast Specialty Pharmacy Decision and Order

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-28

    ...11-68] Treasure Coast Specialty Pharmacy Decision and Order On September 14...issued to Treasure Coast Specialty Pharmacy, be, and it hereby is, revoked. I...application of Treasure Coast Specialty Pharmacy, to renew or modify his...

  8. 33 CFR 64.33 - Marking by the Coast Guard.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Marking by the Coast Guard. 64.33 Section 64.33 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Provisions § 64.33 Marking by the Coast Guard. (a) The District...

  9. 33 CFR 173.83 - Availability of Coast Guard forms.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Availability of Coast Guard forms. 173.83 Section 173...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY... § 173.83 Availability of Coast Guard forms. In a State where...

  10. 46 CFR 188.10-13 - Coast Guard District Commander.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Coast Guard District Commander. 188.10-13...Section 188.10-13 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Subchapter § 188.10-13 Coast Guard District Commander. This...

  11. 33 CFR 118.30 - Action by Coast Guard.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Action by Coast Guard. 118.30 Section 118.30 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...SIGNALS § 118.30 Action by Coast Guard. (a) The District...

  12. 46 CFR 167.05-15 - Coast Guard District Commander.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Coast Guard District Commander. 167.05-15...Section 167.05-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Definitions § 167.05-15 Coast Guard District Commander. This...

  13. 33 CFR 23.15 - Coast Guard ensign.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Coast Guard ensign. 23.15 Section 23...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY GENERAL DISTINCTIVE MARKINGS FOR COAST GUARD VESSELS AND AIRCRAFT §...

  14. 33 CFR 23.12 - Coast Guard identifying insignia.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Coast Guard identifying insignia. 23.12...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY GENERAL DISTINCTIVE MARKINGS FOR COAST GUARD VESSELS AND AIRCRAFT §...

  15. 33 CFR 174.125 - Coast Guard address.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Coast Guard address. 174.125 Section...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY... State Reports § 174.125 Coast Guard address. The report...

  16. 33 CFR 23.20 - Coast Guard commission pennant.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Coast Guard commission pennant. 23.20...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY GENERAL DISTINCTIVE MARKINGS FOR COAST GUARD VESSELS AND AIRCRAFT §...

  17. 49 CFR 850.30 - Procedures for Coast Guard investigation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Procedures for Coast Guard investigation. 850.30 Section...NATIONAL TRANSPORTATION SAFETY BOARD COAST GUARD-NATIONAL TRANSPORTATION SAFETY...INVESTIGATIONS § 850.30 Procedures for Coast Guard investigation. (a) The...

  18. 33 CFR 66.01-15 - Action by Coast Guard.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Action by Coast Guard. 66.01-15 Section 66...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...State § 66.01-15 Action by Coast Guard. (a) The District...

  19. ZOOPLANKTON VOLUMES OFF THE PACIFIC COAST, 1957

    E-print Network

    326 ZOOPLANKTON VOLUMES OFF THE PACIFIC COAST, 1957 t Marine Biological Laboratory^ ;.:.ODS HOLE of the Interior, Fred A. Seaton, Secretary Fish and Wildlife Service, Arnie J. Suoraela, Commissioner ZOOPLANKTON. C. November 1959 #12;Abstract Basic data on volumes or zooplankton off the Pacific coast in 1957

  20. Gulf Coast Community College's Memory Project

    ERIC Educational Resources Information Center

    Burrell, Matthew D.

    2005-01-01

    Gulf Coast Community College in Panama City, Florida, is celebrating a fifty-year anniversary in 2007. Maintained by the library, the school's archives represent the historical contributions on a local and national level. Gulf Coast Community College library is ensuring the school's historical significance through the digitization of its…

  1. Discovering the "-Ologies" on the Jurassic Coast

    ERIC Educational Resources Information Center

    Peacock, Alan

    2007-01-01

    The Jurassic Coast is Britain's only natural World Heritage site, a tangible time-line that takes one through 185 million years of history in 95 miles of coast. It provides individuals with a world-famous educational resource and an unrivalled outdoor classroom that has played a key role in the study of earth sciences. The author is keen to ignite…

  2. Systems Engineering of Coast Guard Aviator Training.

    ERIC Educational Resources Information Center

    Hall, Eugene R.; Caro, Paul W.

    This paper describes a total-program application of the systems engineering concept of the U.S. Coast Guard aviation training programs. The systems approach used treats all aspects of the training to produce the most cost-effective integration of academic, synthetic, and flight training for the production of graduate Coast Guard aviators. The…

  3. MFR PAPER 1172 The Atlantic Coast Surf

    E-print Network

    for tradi- tional specie. such as soft- helled clams (Myo orell{/rio) and hard-shelled clams (M ercellorioMFR PAPER 1172 The Atlantic Coast Surf Clam Fishery-1973 JOHN W. ROPES , ARTHUR S. MERRILL, and GEORGE E. WARD ABSTRACT-The 1973 Atlantic coast surf clam fishery produced landings of 82.3 million

  4. Ecology 2007 95, 10581071

    E-print Network

    Malhi, Yadvinder

    1303, Abidjan, Ivory Coast and UFR Science de la Nature, Université d'Abobo Adjamé, 02 BP 801 Abidjan, Ivory Coast, 7 Conservatoire et Jardin botaniques de la Ville de Genève, case postale 60, CH-1292, Université de Cocody, 22, BP 582 Abidjan, Ivory Coast, 14 Missouri Botanical Garden, 4344 Shaw Boulevard, St

  5. BLACK FRANCOPHONE LITERATURE VIDEOS Page 1 of 3 Last Updated 07/09/02

    E-print Network

    Baskaran, Mark

    /7 - CITY BOY OF THE IVORY COAST This illustrates the interaction of traditional and western influences on the ivory coast of Africa. It studies the eff these influences on an Ivorian schoolboy in Abidjan, the cap city. It also surveys the Ivory Coast's Major exports and i economic base of palm oil

  6. BioMed Central Page 1 of 9

    E-print Network

    Boyer, Edmond

    Pierre Richet, Bouaké, Ivory Coast, 7Institut de Médecine Tropicale du Service de Santé des Armées for 671 isolates originating from three continents: Africa (Senegal, Ivory Coast, Central African Republic Pfcytb sequence, as did most samples originating from Cambodia and Ivory Coast. One synonymous (t759a

  7. West Coast Tsunami: Cascadia's Fault?

    NASA Astrophysics Data System (ADS)

    Wei, Y.; Bernard, E. N.; Titov, V.

    2013-12-01

    The tragedies of 2004 Sumatra and 2011 Japan tsunamis exposed the limits of our knowledge in preparing for devastating tsunamis. The 1,100-km coastline of the Pacific coast of North America has tectonic and geological settings similar to Sumatra and Japan. The geological records unambiguously show that the Cascadia fault had caused devastating tsunamis in the past and this geological process will cause tsunamis in the future. Hypotheses of the rupture process of Cascadia fault include a long rupture (M9.1) along the entire fault line, short ruptures (M8.8 - M9.1) nucleating only a segment of the coastline, or a series of lesser events of M8+. Recent studies also indicate an increasing probability of small rupture occurring at the south end of the Cascadia fault. Some of these hypotheses were implemented in the development of tsunami evacuation maps in Washington and Oregon. However, the developed maps do not reflect the tsunami impact caused by the most recent updates regarding the Cascadia fault rupture process. The most recent study by Wang et al. (2013) suggests a rupture pattern of high- slip patches separated by low-slip areas constrained by estimates of coseismic subsidence based on microfossil analyses. Since this study infers that a Tokohu-type of earthquake could strike in the Cascadia subduction zone, how would such an tsunami affect the tsunami hazard assessment and planning along the Pacific Coast of North America? The rapid development of computing technology allowed us to look into the tsunami impact caused by above hypotheses using high-resolution models with large coverage of Pacific Northwest. With the slab model of MaCrory et al. (2012) (as part of the USGS slab 1.0 model) for the Cascadia earthquake, we tested the above hypotheses to assess the tsunami hazards along the entire U.S. West Coast. The modeled results indicate these hypothetical scenarios may cause runup heights very similar to those observed along Japan's coastline during the 2011 Japan tsunami,. Comparing to a long rupture, the Tohoku-type rupture may cause more serious impact at the adjacent coastline, independent of where it would occur in the Cascadia subduction zone. These findings imply that the Cascadia tsunami hazard may be greater than originally thought.

  8. 77 FR 75101 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 17 to the Salmon Fishery...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-19

    ...Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 17 to the Salmon Fishery Management Plan AGENCY: National Marine...to implement Amendment 17 to the Pacific Coast Salmon Fishery Management Plan for Commercial and...

  9. 76 FR 65673 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 16 to the Salmon Fishery...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-24

    ...Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 16 to the Salmon Fishery Management Plan AGENCY: National Marine...to implement Amendment 16 to the Pacific Coast Salmon Fishery Management Plan for Commercial and...

  10. 78 FR 10557 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 17 to the Salmon Fishery...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-14

    ...Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 17 to the Salmon Fishery Management Plan AGENCY: National Marine...to implement Amendment 17 to the Pacific Coast Salmon Fishery Management Plan for Commercial and...

  11. Greenland's Coast in Holiday Colors

    NASA Technical Reports Server (NTRS)

    2003-01-01

    Vibrant reds, emerald greens, brilliant whites, and pastel blues adorn this view of the area surrounding the Jakobshavn Glacier on the western coast of Greenland. The image is a false-color (near-infrared, green, blue) view acquired by the Multi-angle Imaging SpectroRadiometer's nadir camera. The brightness of vegetation in the near-infrared contributes to the reddish hues; glacial silt gives rise to the green color of the water; and blue-colored melt ponds are visible in the bright white ice. A scattering of small icebergs in Disco Bay adds a touch of glittery sparkle to the scene.

    The large island in the upper left is called Qeqertarsuaq. To the east of this island, and just above image center, is the outlet of the fast-flowing Jakobshavn (or Ilulissat) glacier. Jakobshavn is considered to have the highest iceberg production of all Greenland glaciers and is a major drainage outlet for a large portion of the western side of the ice sheet. Icebergs released from the glacier drift slowly with the ocean currents and pose hazards for shipping along the coast.

    The Multi-angle Imaging SpectroRadiometer views the daylit Earth continuously and the entire globe between 82 degrees north and 82 degrees south latitude is observed every 9 days. These data products were generated from a portion of the imagery acquired on June 18, 2003 during Terra orbit 18615. The image cover an area of about 254 kilometers x 210 kilometers, and use data from blocks 34 to 35 within World Reference System-2 path 10.

    MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Office of Earth Science, Washington, DC. The Terra satellite is managed by NASA's Goddard Space Flight Center, Greenbelt, MD. JPL is a division of the California Institute of Technology.

  12. 5. AERIAL VIEW TO NORTHEAST OF ENTIRE COAST GUARD AIR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. AERIAL VIEW TO NORTHEAST OF ENTIRE COAST GUARD AIR STATION SAN FRANCISCO. 8X10 black and white silver gelatin print. United States Coast Guard Official Photograph, 12th Coast Guard District, San Francisco. 1960. - U.S. Coast Guard Air Station San Francisco, 1020 North Access Road, San Francisco, San Francisco County, CA

  13. The U.S. Coast Guard Academy Curricula; An Evaluation.

    ERIC Educational Resources Information Center

    Powers, Theodore R.; And Others

    This report presents the results of research that had as its objective the evaluation of the curricula of the U.S. Coast Guard Academy. Over 125 Coast Guard officers and men were interviewed to gather detailed background information about the Coast Guard, the Coast Guard Academy, and job requirements of Academy graduates. These data were developed…

  14. Annabella: a North American coasting vessel 

    E-print Network

    Claesson, Stefan Hans

    1998-01-01

    The coasting schooner Annabella was built at Port Elizabeth, New Jersey, in 1834. Originally constructed as a sloop, the vessel was built specifically for transporting raw materials such as cordwood, brick, coal, and ...

  15. The Gulf Coast Energy Conservation Society 

    E-print Network

    Faulkner, C. R.

    1979-01-01

    membership, recent meeting topics, and examples of some benefits to society members are also presented. The Gulf Coast Energy Conservation Society was the outcome of informal meetings between Amoco, Union Carbide, and Monsanto back in 1973 and has grown...

  16. No Ivory Tower.

    ERIC Educational Resources Information Center

    Doti, James L.

    2002-01-01

    Measured the impact of economic cycles on independent colleges and universities, using a national tuition discounting survey. Found that economic cycles and pricing pressures have measurable and predictable effects on independent higher education. (EV)

  17. Leaving the Ivory Tower

    NSDL National Science Digital Library

    Carmine DeCarlo

    2010-07-01

    It all began with casual conversation between a university supervisor and classroom teachers and approval to use an unused classroom at a local elementary school. The space became the hub of an exciting professional development (PD) opportunity for classr

  18. Leaving the Ivory Tower

    ERIC Educational Resources Information Center

    DeCarlo, Carmine

    2010-01-01

    It all began with casual conversation between a university supervisor and classroom teachers and approval to use an unused classroom at a local elementary school. The space became the hub of an exciting professional development (PD) opportunity for classroom teachers. This article describes how hosting an on-site university science methods course…

  19. Ebony and Ivory

    NASA Technical Reports Server (NTRS)

    2004-01-01

    This image from the Mars Exploration Rover Opportunity's front hazard-avoidance camera focuses on a target called 'Goal 5.' Goal 5, examined during the 'Eagle Crater' soil survey, is a wind-rippled spot on the upper part of the crater , which the miniature thermal emission spectrometer shows is higher in hematite content compared to other soils within the crater. The light soil in the center of the image is referred to as 'Lanikai' -- an inspiration from the white sand beaches of Hawaii. The dark soil is referred to as 'Punaluu' after the black sand Hawaiian beaches.

  20. Lever, lifebuoy and ivory

    Microsoft Academic Search

    Amy Sargeant

    2011-01-01

    The article discusses early Lever films as advertisements for the company’s product – soap – and as unofficial propaganda for British imperial interests, both at home and abroad. Its particular focus is the 1919 film, Port Sunlight. Lever’s expansion of his manufacturing business abroad, the article argues, denotes not only Lever’s promulgation of particular Victorian values but also his share

  1. Pipeline problems exacerbate west coast oil surplus

    Microsoft Academic Search

    L. J. CARTER

    1978-01-01

    A discussion showed that Alaskan sour crude has displaced imported sour crude used by west coast refiners, but not the 600,000 bbl\\/day of imported sweet crude. In the absence of pipelines, the 550,000 bbl\\/day excess of Alaskan crude oil must be moved to the Gulf Coast by tankers. Atlantic Richfield Co. already has been forced to abandon its plans to

  2. The National Ocean Service: america's oceans and coasts: safe, healthy, and productive Office of Coast Survey

    E-print Network

    Improvement Act Amendments · Coast and Geodetic Survey Act · Coastal Zone Management Act · Coral Reef and to make sound decisions in U.S. coastal and ocean waters. Products and Services · Navigation services Strategy · Ocean Research Priorities Plan · Gulf of Mexico Regional Alliance · West Coast Governors

  3. Hydrocarbon frontier on the East Coast

    SciTech Connect

    Bowman, H.E.; Sheppard, R.C.; Ziegler, D.G.

    1987-10-12

    This article states that numerous buried Mesozoic basins can be found beneath the Atlantic Coastal Plain sediments. A data acquisition program is being done by Teledyne Exploration Company to provide stratigraphically placed seismic reflection profiles across some of the basins. This article describes what Teledyne is doing. The early Mesozoic rift system, a hydrocarbon frontier on the East Coast, provides promise of a major oil and gas producing province stretching 900 miles along the East Coast. Data at hand now give support to the key elements required, namely, source, reservoir, traps, and seal. Technology has improved to where seismic data resolution now distinctly maps attitudes of beds within these basins in spite of the drastic velocity change at the postrift unconformity of the buried basins and man-made noise and population density. With the continuing risk of energy shortfalls either by reserve, supply, or transportation deficiencies, the authors believe the East Coast is a good place to be.

  4. Gulf Coast Clean Energy Application Center

    SciTech Connect

    Dillingham, Gavin

    2013-09-30

    The Gulf Coast Clean Energy Application Center was initiated to significantly improve market and regulatory conditions for the implementation of combined heat and power technologies. The GC CEAC was responsible for the development of CHP in Texas, Louisiana and Oklahoma. Through this program we employed a variety of outreach and education techniques, developed and deployed assessment tools and conducted market assessments. These efforts resulted in the growth of the combined heat and power market in the Gulf Coast region with a realization of more efficient energy generation, reduced emissions and a more resilient infrastructure. Specific t research, we did not formally investigate any techniques with any formal research design or methodology.

  5. 29. COAST LANDSCAPE VIEW FROM HIGHWAY 101, 10 MILES SOUTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. COAST LANDSCAPE VIEW FROM HIGHWAY 101, 10 MILES SOUTH OF CRESCENT CITY. DEL NORTE COUNTY, CALIFORNIA. LOOKING S. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

  6. Radiological Habits Survey: Dumfries and Galloway Coast, 2007

    E-print Network

    Radiological Habits Survey: Dumfries and Galloway Coast, 2007 #12;This page has been intentionally left blank #12;Radiological Habits Survey: Dumfries and Galloway Coast, 2007 FINAL REPORT ...........................................................................................8 1.3 Dose limits and constraints

  7. ENIRONMENTAL MONITORING AND ASSESSMENT WEST COAST PILOT 2002 INTERTIDAL ASSESSMENT

    E-print Network

    QAPP FOR ENIRONMENTAL MONITORING AND ASSESSMENT PROGRAM WEST COAST PILOT 2002 INTERTIDAL ASSESSMENT ENIRONMENTAL MONITORING AND ASSESSMENT PROGRAM WEST COAST PILOT 2002 INTERTIDAL ASSESSMENT: CALIFORNIA Institute Larry Cooper Southern California Coastal Water Research Project Roslynn Dunn Moss Landing Marine

  8. 49 CFR 850.10 - Preliminary investigation by the Coast Guard.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Preliminary investigation by the Coast Guard. 850.10 Section 850.10...NATIONAL TRANSPORTATION SAFETY BOARD COAST GUARD-NATIONAL TRANSPORTATION SAFETY...Preliminary investigation by the Coast Guard. (a) The Coast Guard...

  9. CHARLESTON FUND School of humanitieS

    E-print Network

    Young, Paul Thomas

    " in which traders sailed down the area of what is now the Ivory Coast, Ghana, Togo and Benin, purchasing slaves, gold and ivory at a number of ports, and then selling as many slaves as possible to Portuguese

  10. GULF COAST REGIONAL ASSESSMENT: PROJECT DESCRIPTION

    EPA Science Inventory

    As part of the USGCRP's First National Assessment effort, EPA is sponsoring the Gulf Coast Regional Assessment. Southern University and A&M College and its collaborators are analyzing and evaluating the potential consequences of climate variability and change for the region in th...

  11. Conservation in a Gulf Coast Chemical Plant 

    E-print Network

    Murray, F.

    1983-01-01

    The MCA reports chemical industry energy compared to 1972 to be 24.2% (1981 data). This paper will describe the activity of one Gulf Coast chemical industry plant which has reduced consumption by 41%. Improvements have been made via energy...

  12. CONTAMINATION OF ATLANTIC COAST COMMERCIAL SHELLFISH

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Shellfish (oysters and/or clams) were obtained from 37 commercial harvesting sites in 12 Atlantic coast states from Maine to Florida and 1 site in New Brunswick, Canada. Gill washings from 25 shellfish at each site were examined by immunofluorescence microscopy (IFA) for oocysts of Cryptosporidium. ...

  13. SOUTH COAST SCHOOL BUS IDLING STUDY

    EPA Science Inventory

    The Natural Resources Defense Council (NRDC) and Coalition for Clean Air (CCA) conducted this study to provide information useful for estimating exposure of children in the South coast air basin to diesel exhaust while buses are loading and unloading at shcool sites. It was foun...

  14. Coast Guard's Response to Spilled Oil

    ERIC Educational Resources Information Center

    Ard, R. W., Jr.

    1976-01-01

    The Coast Guard utilizes a number of monitoring detectors, sensors, and techniques to find, recover and identify oil spills. Discussed in this article are in-situ and airborne sensors, systems developed to provide clean-up capability such as air deployable anti-pollution transfer system (ADAPTS), and techniques which will determine the source of a…

  15. Expedition cruising along Australia's remote Kimberley coast

    Microsoft Academic Search

    Ross Kingston Dowling; Pascal Scherrer; Amanda J Smith

    2010-01-01

    Expedition Cruising is growing rapidly around the world. One emerging destination is the Kimberley Coast of far north Western Australia. It is accessible almost exclusively by sea or air and has gained increasing popularity in recent years because of its spectacular scenery, pristine nature, Aboriginal rock art and remoteness, giving visitors the impression of exploring an ‘untouched’ world. Over recent

  16. CoastWatch Data Analysis Tool

    E-print Network

    and animation support for map comparisons · Geographic feature support with attributes #12;CDAT Software DesignCoastWatch Data Analysis Tool Software Design Review Peter Hollemans January 2008 #12;CDAT Software Review Peter Hollemans, January 2008 3 Overview #12;CDAT Software Design Review Peter Hollemans, January

  17. METRO EAST COAST ASSESSMENT: FINAL ASSESSMENT REPORT

    EPA Science Inventory

    The Metropolitan East Coast Regional Assessment is one of eighteen regional components of The U.S. National Assessment of the Potential Consequences of Climate Variability and Change, organized by the U.S. Global Change Research Program. The goal of each regional assessment is to...

  18. Experimental Squid Jigging Off the Washington Coast

    E-print Network

    Experimental Squid Jigging Off the Washington Coast ROGER W. MERCER and MICHELE SUCY Introduction Service was contacted by Capta in Jerry Sweeney of the salmon charter vessel Tres Cher in regard to squid of existing literature on squid yielded several pieces of information which indicated some potential

  19. General Education at the Coast Guard Academy.

    ERIC Educational Resources Information Center

    Sanders, William A.

    In seeking the most effective presentation of the liberal arts in curricula such as the heavily technical and professional curricula at the U.S. Coast Guard Academy, which leave little room for general education, general education course design must capture the imagination of students and motivate them for continuing self-education. Development of…

  20. THREAD HERRING DISTRIBUTION OFF FLORIDA'S WEST COAST

    E-print Network

    THREAD HERRING DISTRIBUTION OFF FLORIDA'S WEST COAST Brian S. Kinne a r and Charles M. Fuss Jr. The thread herring (Opisthonema oglinum) is essentially a coastal pelagic species. Data suggest a seasonal concentrations of thread herring occur near Ft. Myers. Florida. during the winter. The prospects for a commer

  1. Origin of barrier islands on sandy coasts

    Microsoft Academic Search

    1990-01-01

    Many barrier islands on the coasts of the Gulf of Mexico contain one or more nuclei; island growth has taken place more or less seaward from these nuclei, which are the oldest parts of the islands. The nuclei were, at one time, separate islands; the oldest beach ridges wrap around them on two or three sides, showing that they were

  2. 75 FR 54791 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-09

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 9, 10...announces three inseason actions in the ocean salmon fisheries. Inseason actions 9 and...effect until the closing date of the 2010 salmon season announced in the 2010 annual...

  3. 76 FR 17033 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-28

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 1, 2...announces four inseason actions in the ocean salmon fisheries. Inseason action 1 modified...in effect until the opening of the 2011 salmon season announced in the 2011...

  4. 78 FR 24360 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-25

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 1 and...announces two inseason actions in the ocean salmon fisheries. These inseason actions modified...2012 annual management measures for ocean salmon fisheries (77 FR 25915, May 2,...

  5. 77 FR 55426 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-10

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 4 through...announces 11 inseason actions in the ocean salmon fisheries. These inseason actions modified...2012 annual management measures for ocean salmon fisheries (77 FR 25915, May 2,...

  6. 77 FR 61728 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-11

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 15 through...announces 7 inseason actions in the ocean salmon fisheries. These inseason actions modified...2012 annual management measures for ocean salmon fisheries (77 FR 25915, May 2,...

  7. 77 FR 65329 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-26

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 22 through...announces 5 inseason actions in the ocean salmon fisheries. These inseason actions modified...2012 annual management measures for ocean salmon fisheries (77 FR 25915, May 2,...

  8. 78 FR 35153 - Fisheries Off West Coast States; Modifications of the West Coast Commercial Salmon Fisheries...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-12

    ...Modifications of the West Coast Commercial Salmon Fisheries; Inseason Actions 4 and...announces two inseason actions in the ocean salmon fisheries. These inseason actions modified...2013 annual management measures for ocean salmon fisheries (78 FR 25865, May 3,...

  9. 78 FR 30780 - Fisheries Off West Coast States; Modifications of the West Coast Commercial Salmon Fisheries...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-23

    ...Modifications of the West Coast Commercial Salmon Fisheries; Inseason Action 3 AGENCY...announces one inseason action in the ocean salmon fisheries. This inseason action modified...2013 annual management measures for ocean salmon fisheries (78 FR 25865, May 3,...

  10. 77 FR 22682 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-17

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 1, 2...announces 3 inseason actions in the ocean salmon fisheries. These inseason actions modified...2011 annual management measures for ocean salmon fisheries (76 FR 25246, May 4,...

  11. 78 FR 50347 - Fisheries Off West Coast States; Modifications of the West Coast Commercial Salmon Fisheries...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-19

    ...Modifications of the West Coast Commercial Salmon Fisheries; Inseason Actions 6 Through...announces six inseason actions in the ocean salmon fisheries. These inseason actions modified...2013 annual management measures for ocean salmon fisheries (78 FR 25865, May 3,...

  12. 78 FR 70509 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-26

    ...Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 12...announces 23 inseason actions in the ocean salmon fisheries. These inseason actions modified the commercial and recreational salmon fisheries in the area from the...

  13. 75 FR 44925 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-30

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 1, 2...announces four inseason actions in the ocean salmon fisheries. Inseason action 1 modified...effect until the closing date of the 2010 salmon season announced in the 2010 annual...

  14. 78 FR 54801 - Gulf Coast Restoration Trust Fund

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-06

    ...Opportunities, and Revived Economies of the Gulf Coast States...Department of the Treasury, Attention Janet Vail, Room 2050...the environment and economy of the Gulf Coast region...of the ecosystems and economy of the Gulf Coast region...Management and Budget, Attention: Desk Officer for...

  15. Modeling Coast Redwood Variable Retention Management Regimes1

    E-print Network

    Standiford, Richard B.

    Modeling Coast Redwood Variable Retention Management Regimes1 John-Pascal Berrill2 and Kevin O of overstory and understory cohorts within pure coast redwood (Sequoia sempervirens) stands managed under comparison of aggregated and dispersed variable retention. Key words: coast redwood, growth and yield, leaf

  16. Whiskey Springs Long-Term Coast Redwood Density Management; Final

    E-print Network

    Standiford, Richard B.

    571 Whiskey Springs Long-Term Coast Redwood Density Management; Final Growth, Sprout, and Yield sempervirens, coast redwood, commercial thinning, precommercial thinning, regeneration, sprouting Introduction-year site index of 180 ft. Vigorous coast redwood (Sequoia sempervirens [D.Don] Endl.) sprouting

  17. Landslides After Clearcut Logging in a Coast Redwood Forest1

    E-print Network

    Standiford, Richard B.

    163 Landslides After Clearcut Logging in a Coast Redwood Forest1 Leslie M. Reid2 and Elizabeth T (for example, Wu et al. 1979). However, because second-growth coast redwoods (Sequoia sempervirens at the redwood science symposium: coast redwood forests in a changing California. 21-23 June 2011, Santa Cruz

  18. The CoastWatch Data Analysis Tool Peter Hollemans

    E-print Network

    The CoastWatch Data Analysis Tool Peter Hollemans SES Inc. Contractor for NOAA/NESDIS October, 2003 #12;October, 2003 Peter Hollemans, SES Inc. Contractor for NOAA/ NESDIS CoastWatch Data Analysis Tool #12;October, 2003 Peter Hollemans, SES Inc. Contractor for NOAA/ NESDIS CoastWatch Data Analysis Tool

  19. 33 CFR 173.35 - Coast Guard validation sticker.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Coast Guard validation sticker. 173.35 Section 173...Numbering § 173.35 Coast Guard validation sticker. No person may use a vessel...by the Coast Guard unless it has the validation sticker issued with the certificate...

  20. 33 CFR 173.35 - Coast Guard validation sticker.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Coast Guard validation sticker. 173.35 Section 173...Numbering § 173.35 Coast Guard validation sticker. No person may use a vessel...by the Coast Guard unless it has the validation sticker issued with the certificate...

  1. Coastal online analysis and synthesis tool 2.0 (COAST)

    Microsoft Academic Search

    R. B. Brown; A. R. Navard; B. T. Nguyen

    2009-01-01

    The Coastal Online Assessment and Synthesis Tool (COAST) geobrowser has been developed at NASA Stennis Space Center (SSC) for integration of previously disparate coastal datasets from NASA and other sources into a common desktop client tool. COAST will provide insightful new data visualization and analysis capabilities for the coastal researcher. COAST is built upon the NASA open source 3D geobrowser,

  2. SLAVE TRADE AND SLAVERY ON THE SWAHILI COAST, 150017501

    E-print Network

    Paris-Sud XI, Université de

    Chapter 4 SLAVE TRADE AND SLAVERY ON THE SWAHILI COAST, 1500­17501 Thomas Vernet Agreat deal of research has been carried out on the slave trade and slavery on the Swahili coast. John Middleton wrote on the coast, which demanded plentiful servile manpower. The slave trade, centered on Zanzibar, developed

  3. THE ATLANTIC COAST SURF CLAM with a partial bibliography

    E-print Network

    THE ATLANTIC COAST SURF CLAM · with a partial bibliography UNITED STATES DEPARTMENT OF THE INTERIOR OF THE INTERIOR U.S. FISH AND WILDLIFE SERVICE BUREAU OF COMMERCIAL FISHERIES THE ATLANTIC COAST SURF CLAM #12;f OL }( - U ~ . #12;THE ATLANTIC COAST SURF CLAM with a partial bibliography By ROBER T M . YANCEY

  4. USGS with U.S. and Canadian Coast Guard

    USGS Multimedia Gallery

    Waiting to board the Canadian helicopter from U.S. Coast Guard Cutter Healy and visit Canadian Coast Guard Ship Louis S. St. Laurent. From left to right: USGS scientist Jonathan Childs, chief scientist for this expedition on Healy; U.S. Coast Guard Lieutenant Commander Douglas Petrusa; Canadian Coas...

  5. 1. AERIAL VIEW TO WEST OF COAST GUARD AIR STATION ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. AERIAL VIEW TO WEST OF COAST GUARD AIR STATION SAN FRANCISCO, SHOWING ALL MAJOR BUILDINGS. 8X10 black and white silver gelatin print. United States Coast Guard, February 1962. - U.S. Coast Guard Air Station San Francisco, 1020 North Access Road, San Francisco, San Francisco County, CA

  6. 4. AERIAL VIEW TO SOUTHEAST OF ENTIRE COAST GUARD AIR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. AERIAL VIEW TO SOUTHEAST OF ENTIRE COAST GUARD AIR STATION SAN FRANCISCO. 8X10 black and white silver gelatin print. United States Coast Guard Official Photograph, 12th District, File No. 62751-22 A.S. Date unknown. - U.S. Coast Guard Air Station San Francisco, 1020 North Access Road, San Francisco, San Francisco County, CA

  7. 2. AERIAL VIEW TO SOUTHEAST OF COAST GUARD AIR STATION ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. AERIAL VIEW TO SOUTHEAST OF COAST GUARD AIR STATION SAN FRANCISCO, SHOWING ALL MAJOR BUILDINGS. 8X10 black and white silver gelatin print. United States Coast Guard, February 1962. - U.S. Coast Guard Air Station San Francisco, 1020 North Access Road, San Francisco, San Francisco County, CA

  8. Family moves and depression among Coast Guard wives.

    PubMed

    McGarigal, Alyssa; Jablonski, Jessica; Ferri, Christine; Lester, David

    2009-12-01

    A comparison of 78 Coast Guard wives' and 30 firefighters' wives' scores on Zung's self-rating scale for depression showed no differences, but the Coast Guard wives had more often been prescribed antidepressants. Scores on a scale to assess the negative effects of moving were positively associated with current depression for the Coast Guard wives. PMID:20099556

  9. 46 CFR 90.10-9 - Coast Guard District Commander.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Coast Guard District Commander. 90.10-9 Section 90.10-9 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...This Subchapter § 90.10-9 Coast Guard District Commander. This...

  10. MONTHLY SEA-SURFACE TEMPERATURE ANOMALY GRAPHS FOR ATLANTIC COAST

    E-print Network

    MONTHLY SEA-SURFACE TEMPERATURE ANOMALY GRAPHS FOR ATLANTIC COAST STATIONS by Franklin StearnsKeman, Director Monthly Sea-Surface Temperature Anomaly Graphs For Atlantic Coast Stations by Franklin Stearns. December 19^4 #12;Monthly Sea-Surface Temperature Anomaly Graphs For Atlantic Coast Stations by Franklin

  11. Abandoned oil fields of Texas Gulf Coast

    SciTech Connect

    Dutton, S.P.

    1984-04-01

    One nonconventional oil target in Texas is the oil that remains in abandoned fields, defined as those fields that had no oil or gas production in 1977 and 1982. This target includes oil that has not been tapped by conventional field development because of reservoir heterogeneity and oil in reservoirs that have not been subjected to any secondary or tertiary recovery efforts. A total of 138 abandoned oil fields having individual cumulative production greater than 500,000 bbl are located in the Texas Gulf Coast (railroad Commission of Texas Districts 2, 3, and 4). These 138 onshore fields produced 276 million barrels of oil before being abandoned. Nongiant fields in the Texas Gulf Coast average about 40% ultimate recovery, so these fields probably originally contained about 700 million bbl of oil in place. Therefore, about 424 million bbl of oil remain unrecovered. Reservoirs in these abandoned fields are Tertiary sandstones. The 44 abandoned fields in the upper Texas Gulf Coast (District 3) produced from a wide range of plays; those plays with the largest number of abandoned fields are Yegua and Frio deep-seated domes, Eocene deltaic sandstone, and Frio barrier/strand-plain sandstone. The 19 abandoned fields in the middle Texas Gulf Coast (District 2) produced mainly from Wilcox and Frio fluvial/deltaic sandstones and from Frio and Jackson-Yegua barrier/strand-plain sandstones. The lower Texas Gulf Coast (District 4) contains 75 abandoned fields that produced from Frio fluvial/deltaic and barrier/strand-plain sandstones and from Jackson-Yegua barrier/strand-plain sandstones.

  12. The Reception and Animation of Out-of-School Educational Television Programs in the Ivory Coast: A Case Study of Four Villages. An English Summary by L. Theresa Silverman.

    ERIC Educational Resources Information Center

    Benveniste, Annie

    This impact study for a series of Out of School Television (OSTV--Tele Pour Tous) broadcasts on village water supplies presents a qualitative examination of some of the problems encountered in the organization of viewing groups in four selected villages. The research techniques used included questionnaires and feedback sheets on demographics, the…

  13. Micropropagation of Coast Redwood (Sequoia Sempervirens)

    Microsoft Academic Search

    S. S. KORBAN; I.-W. SUL

    Sequoia sempervirens (Lamb.) Endl., coast redwood, is a long-lived evergreen gymnosperm belonging to the family Taxodiaceae. This species is endemic\\u000a to the coastal regions of California and Oregon, USA (Srinivasan & Friis, 1989; Ma et al., 2005). The fossil records of the\\u000a genus Sequoia can be traced back to the Jurassic Period, in China (Endo, 1951). The tree is characterized

  14. WEST COAST REGIONAL CARBON SEQUESTRATION PARTNERSHIP

    SciTech Connect

    Larry Myer; Terry Surles; Kelly Birkinshaw

    2004-01-01

    The West Coast Regional Carbon Sequestration Partnership is one of seven partnerships which have been established by the US Department of Energy (DOE) to evaluate carbon dioxide capture, transport and sequestration (CT&S) technologies best suited for different regions of the country. The West Coast Region comprises Arizona, California, Nevada, Oregon, Washington, and the North Slope of Alaska. Led by the California Energy Commission, the West Coast Partnership is a consortium of over thirty five organizations, including state natural resource and environmental protection agencies; national labs and universities; private companies working on CO{sub 2} capture, transportation, and storage technologies; utilities; oil and gas companies; nonprofit organizations; and policy/governance coordinating organizations. In an eighteen month Phase I project, the Partnership will evaluate both terrestrial and geologic sequestration options. Work will focus on five major objectives: (1) Collect data to characterize major CO{sub 2} point sources, the transportation options, and the terrestrial and geologic sinks in the region, and compile and organize this data via a geographic information system (GIS) database; (2) Address key issues affecting deployment of CT&S technologies, including storage site permitting and monitoring, injection regulations, and health and environmental risks (3) Conduct public outreach and maintain an open dialogue with stakeholders in CT&S technologies through public meetings, joint research, and education work (4) Integrate and analyze data and information from the above tasks in order to develop supply curves and cost effective, environmentally acceptable sequestration options, both near- and long-term (5) Identify appropriate terrestrial and geologic demonstration projects consistent with the options defined above, and create action plans for their safe and effective implementation A kickoff meeting for the West Coast Partnership was held on Sept 30-Oct.1. Contracts were then put into place with twelve organizations which will carry out the technical work required to meet Partnership objectives.

  15. Peruvian Arid Coast and Agriculture, South America

    NASA Technical Reports Server (NTRS)

    1991-01-01

    The coast of Peru, between the Pacific Ocean and the Andes Mountains is very arid (16.5S, 72.5W). For several thousand years, water from numerous small streams has been used for traditional flood and canal irrigation agriculture. However, during the past decade innovative techniques have tapped new water sources for increased agricultural production. Ground water in the porous sedimentary rock formations has been tapped for well irrigation agriculture.

  16. Impact of prescribed burning on Gulf Coast tick populations 

    E-print Network

    Oldham, Thomas Walter

    1983-01-01

    effects of prescribed range burning on Gulf Coast ticks at the Welder Wildlife Refuge near Sinton, Texas. 25 Total number of Gulf Coast ticks collected using COP- baited traps during 1979 and 1980 from four unburned plant communities at the Rob... of stout spines on the ventral side of the distal extremity. " Gulf Coast ticks may be readily distinguished from their American relatives. Males of the lone star tick (A. americanum L. ) have less dorsal ornamentation and females have the familiar...

  17. Shoreface morphodynamics along the Danube Delta coast

    NASA Astrophysics Data System (ADS)

    Tatui, Florin; Vespremeanu-Stroe, Alfred

    2015-04-01

    The shoreface has an important long-term contribution to the coastal sediment budget as it behaves as either a sink or source of sediment from/to the active zone (Hinton and Nicholls, 2007). Hence, it modulates the long-term shoreline movement. However, the shoreface behaviour remains poorly understood and such studies are scarce especially because of the lack of extensive long-term good-quality data. The objective of this study is to examine and explain the shoreface morphodynamics along the Danube Delta coast. The shoreface morphodynamics has been investigated over the medium- and large-scales (decades to centuries). This is a wave-dominated, low-lying coastline interrupted by river mouths and, sometimes, by engineering structures (jetties). This work uses historical and modern maps (since 1856) and bathymetrical measurements (2008 and 2014) extending along the whole Danube Delta coast (both Romanian and Ukrainian sectors) to water depths of approximately 20 m; sectorial seasonal and annual bathymetries of the upper shoreface (2003 - 2014); LIDAR data (2011), recent high resolution satellite images, ortophotos and GPS surveys for shoreline extraction, which were comparatively analysed (volume changes, profile to profile evolution) by means of GIS techniques in order to explain the morphological and volumetric evolution of the shoreface. The large scale coastal behaviour of Danube Delta coast (expressed in terms of shoreface sediment volume and spatial distribution pattern of cells) is linked to climatic forcings (storminess), Danube river sediment supply changes, longshore sediment transport distribution and impact of hard coastal engineering structures. Significant increase of shoreface volume in the last century is related to active deltaic lobes (Chilia) or developing barrier islands (Sacalin), while decreasing shoreface volumes are related to the presence of Sulina jetties which blocked the longshore sediment transport and induced severe erosion downdrift. In the last three decades, we can observe an important reduction of the shoreface volume due to the significant decrease of Danube river sediment input as a result of the construction of dams and other human activities. On many coastal sectors, the upper shoreface represents the bar zone, characterised by the presence of nearshore longshore sandbars which exhibit a multi-annual net offshore migration with various rates, depending on environmental characteristics of each sector (mainly nearshore slope and wave climate). By the process of bar decay, these morphological features supply the lower shoreface with important volumes of sediment during stormy intervals (in accordance with the findings of Aagaard, 2011). Our results should provide a better understanding of coastal processes along the Danube Delta coast, absolutely necessary in the context of sustainable coastal management and planning.

  18. 50 CFR 226.210 - Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...false Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California Coasts Coho Salmon (Oncorhynchus kisutch). 226...210 Central California Coast Coho Salmon (Oncorhynchus kisutch ),...

  19. 50 CFR 226.210 - Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...false Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California Coasts Coho Salmon (Oncorhynchus kisutch). 226...210 Central California Coast Coho Salmon (Oncorhynchus kisutch ),...

  20. 50 CFR 226.210 - Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...false Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California Coasts Coho Salmon (Oncorhynchus kisutch). 226...210 Central California Coast Coho Salmon (Oncorhynchus kisutch ),...

  1. 50 CFR 226.210 - Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...false Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California Coasts Coho Salmon (Oncorhynchus kisutch). 226...210 Central California Coast Coho Salmon (Oncorhynchus kisutch ),...

  2. 50 CFR 226.210 - Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...false Central California Coast Coho Salmon (Oncorhynchus kisutch), Southern Oregon/Northern California Coasts Coho Salmon (Oncorhynchus kisutch). 226...210 Central California Coast Coho Salmon (Oncorhynchus kisutch ),...

  3. 76 FR 68349 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-04

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 5 Through...announces 22 inseason actions in the ocean salmon fisheries. These inseason actions modified...effect until the closing date of the 2011 salmon season announced in the 2011 annual...

  4. 75 FR 75638 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-06

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 12 and...announces two inseason actions in the ocean salmon fisheries. Inseason action 12 modified...effect until the closing date of the 2010 salmon season announced in the 2010 annual...

  5. 75 FR 75639 - Fisheries Off West Coast States; Modifications of the West Coast Commercial and Recreational...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-06

    ...West Coast Commercial and Recreational Salmon Fisheries; Inseason Actions 14 and...announces two inseason actions in the ocean salmon fisheries. Inseason action 14 modified...effect until the closing date of the 2010 salmon season announced in the 2010 annual...

  6. Geochemistry of impactites and basement lithologies from ICDP borehole LB-07A, Bosumtwi impact structure, Ghana

    NASA Astrophysics Data System (ADS)

    Coney, Louise; Reimold, Wolf Uwe; Gibson, Roger L.; Koeberl, Christian

    In 2004, a drilling project by the International Continental Scientific Drilling Program (ICDP) at the Bosumtwi impact crater, Ghana (1.07 Myr old and 10.5 km in diameter), obtained drill core LB-07A, which sampled impactites and underlying metasediments in the crater moat surrounding the small central uplift of the structure. The LB-07A core consists of three sequences: 82.29 m of an upper impactite sequence of alternating polymict lithic and suevitic impact breccias overlying 54.88 m of so-called lower impactite of monomict impact breccia with several suevite intercalations, and 74.53 m of meta-graywacke and altered shale of the basement, also containing a number of suevite intercalations. Major- and trace-element characteristics of all three sequences have been determined to investigate breccia formation and the role of the respective basement lithologies therein. Compositions of polymict impact breccias of the crater fill revealed by core LB-07A are compared with the compositions of the Ivory Coast tektites and the fallout suevites. The impactites of the LB-07A borehole appear well homogenized with respect to the silicate component, and little change in the ranges of many major- and trace-element differences is seen along the length of the borehole (except for Fe2O3, MgO, and CaO contents). Much scatter is observed for a number of elements, and in many cases this increases with depth. It is proposed that any variability in composition is likely the function of clast population differences (i.e., also of relatively small sample sizes). No systematic compositional difference between polymict lithic and suevitic impact breccias is evident. An indication of carbonate enrichment due to hydrothermal alteration is observed in samples from all lithologies. The impactites of the borehole generally show intermediate compositions to previously defined target rocks. The fallout suevites have comparable major element abundances, except for relatively lower MgO contents. The Ivory Coast tektites are generally similar in composition to the LB-07A suevites, but broader ranges in MgO and CaO contents are observed for the LB-07A suevites.

  7. Phytoplankton off the West Coast of Africa

    NASA Technical Reports Server (NTRS)

    2002-01-01

    Just off the coast of West Africa, persistent northeasterly trade winds often churn up deep ocean water. When the nutrients in these deep waters reach the ocean's surface, they often give rise to large blooms of phytoplankton. This image of the Mauritanian coast shows swirls of phytoplankton fed by the upwelling of nutrient-rich water. The scene was acquired by the Medium Resolution Imaging Spectrometer (MERIS) aboard the European Space Agency's ENVISAT. MERIS will monitor changes in phytoplankton across Earth's oceans and seas, both for the purpose of managing fisheries and conducting global change research. NASA scientists will use data from this European instrument in the Sensor Intercomparison and Merger for Biological and Interdisciplinary Oceanic Studies (SIMBIOS) program. The mission of SIMBIOS is to construct a consistent long-term dataset of ocean color (phytoplankton abundance) measurements made by multiple satellite instruments, including the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and the Moderate-Resolution Imaging Spectroradiometer (MODIS). For more information about MERIS and ENVISAT, visit the ENVISAT home page. Image copyright European Space Agency

  8. Site characterization plan: Gulf Coast salt domes

    SciTech Connect

    Not Available

    1983-12-01

    The National Waste Terminal Storage (NWTS) program of the US Department of Energy (DOE) is responsible for developing technology and providing facilities for safe, environmentally acceptable, permanent disposal of high-level nuclear waste. The Office of Nuclear Waste Isolation has been intensively investigating Gulf Coast Salt Dome Basin salt domes and bedded salt in Texas and Utah since 1978. In the Gulf Coast, the application of screening criteria in the region phase led to selection of eight domes for further study in the location phase. Further screening in the area phase identified four domes for more intensive study in the location phase: Oakwood Dome, Texas; Vacherie Dome, Louisiana; and Richton Dome and Cypress Creek Dome, Mississippi. For each dome, this Site Characterization Plan identifies specific hydrologic, geologic, tectonic, geochemical, and environmental key issues that are related to the DOE/NWTS screening criteria or affect the feasibility of constructing an exploratory shaft. The Site Characterization Plan outlines studies need to: (1) resolve issues sufficiently to allow one or more salt domes to be selected and compared to bedded salt sites in order to determine a prime salt site for an exploratory shaft; (2) conduct issue-related studies to provide a higher level of confidence that the preferred salt dome site is viable for construction of an exploratory shaft; and (3) provide a vehicle for state input to issues. Extensive references, 7 figures, 20 tables.

  9. 33 CFR 334.1480 - Vieques Passage and Atlantic Ocean, off east coast of Puerto Rico and coast of Vieques Island...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 2014-07-01 false Vieques Passage and Atlantic Ocean, off east coast of Puerto Rico and coast of Vieques...AREA REGULATIONS § 334.1480 Vieques Passage and Atlantic Ocean, off east coast of Puerto Rico and coast of...

  10. 33 CFR 334.1480 - Vieques Passage and Atlantic Ocean, off east coast of Puerto Rico and coast of Vieques Island...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 2012-07-01 false Vieques Passage and Atlantic Ocean, off east coast of Puerto Rico and coast of Vieques...AREA REGULATIONS § 334.1480 Vieques Passage and Atlantic Ocean, off east coast of Puerto Rico and coast of...

  11. 33 CFR 334.1480 - Vieques Passage and Atlantic Ocean, off east coast of Puerto Rico and coast of Vieques Island...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 2013-07-01 false Vieques Passage and Atlantic Ocean, off east coast of Puerto Rico and coast of Vieques...AREA REGULATIONS § 334.1480 Vieques Passage and Atlantic Ocean, off east coast of Puerto Rico and coast of...

  12. 78 FR 34568 - Special Local Regulation; Heritage Coast Offshore Grand Prix, Tawas Bay; East Tawas, MI

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-10

    ...Regulation; Heritage Coast Offshore Grand Prix, Tawas Bay; East Tawas, MI AGENCY...after the Heritage Coast Offshore Grand Prix boat race. This special local regulation...Regulation; Heritage Coast Offshore Grand Prix, East Tawas, MI. (a) Regulated...

  13. 3 CFR - National Policy for the Oceans, Our Coasts, and the Great Lakes

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...the Oceans, Our Coasts, and the Great Lakes Presidential Documents Other...the Oceans, Our Coasts, and the Great Lakes Memorandum for the Heads of...The oceans, our coasts, and the Great Lakes provide jobs, food,...

  14. California’s North Coast Fishing Communities Historical Perspective and Recent Trends

    E-print Network

    Pomeroy, Caroline; Thomson, Cynthia J.; Stevens, Melissa M.

    2011-01-01

    North Coast between 2005 and 2007 – 143,000 in the ‘Redwoodand Redwood (which covers Humboldt and Del Norte counties) – together characterize North CoastCoast trips occur in Humboldt and Del Norte counties (Redwood

  15. 47 CFR 80.605 - U.S. Coast Guard coordination.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...documentation as to this fact. Note: Surveillance radar coast stations do not require U.S. Coast...Coast station transponders (i.e., radar beacons, or racons) operating in the...824-2, “Technical Parameters of Radar Beacons (RACONS),”...

  16. 47 CFR 80.605 - U.S. Coast Guard coordination.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...documentation as to this fact. Note: Surveillance radar coast stations do not require U.S. Coast...Coast station transponders (i.e., radar beacons, or racons) operating in the...824-2, “Technical Parameters of Radar Beacons (RACONS),”...

  17. 76 FR 47094 - Revisions to the California State Implementation Plan; South Coast Air Quality Management District

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-04

    ...Implementation Plan; South Coast Air Quality Management District AGENCY: Environmental...revision to the South Coast Air Quality Management District portion of the California...local rule: South Coast Air Quality Management District Rule 1175,...

  18. 33 CFR 165.1339 - Safety Zone; Coast Guard Exercise Area, Hood Canal, Washington.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 false Safety Zone; Coast Guard Exercise Area, Hood Canal, Washington. 165...165.1339 Safety Zone; Coast Guard Exercise Area, Hood Canal, Washington. ...is involved in a Coast Guard training exercise while such vessel is transiting...

  19. 33 CFR 165.1339 - Safety Zone; Coast Guard Exercise Area, Hood Canal, Washington.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 false Safety Zone; Coast Guard Exercise Area, Hood Canal, Washington. 165...165.1339 Safety Zone; Coast Guard Exercise Area, Hood Canal, Washington. ...is involved in a Coast Guard training exercise while such vessel is transiting...

  20. 40 CFR 408.190 - Applicability; description of the West Coast mechanized salmon processing subcategory.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...description of the West Coast mechanized salmon processing subcategory. 408.190...SOURCE CATEGORY West Coast Mechanized Salmon Processing Subcategory § 408.190...description of the West Coast mechanized salmon processing subcategory. The...

  1. 40 CFR 408.190 - Applicability; description of the West Coast mechanized salmon processing subcategory.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...description of the West Coast mechanized salmon processing subcategory. 408.190...SOURCE CATEGORY West Coast Mechanized Salmon Processing Subcategory § 408.190...description of the West Coast mechanized salmon processing subcategory. The...

  2. 40 CFR 408.190 - Applicability; description of the West Coast mechanized salmon processing subcategory.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...description of the West Coast mechanized salmon processing subcategory. 408.190...SOURCE CATEGORY West Coast Mechanized Salmon Processing Subcategory § 408.190...description of the West Coast mechanized salmon processing subcategory. The...

  3. 40 CFR 408.190 - Applicability; description of the West Coast mechanized salmon processing subcategory.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...description of the West Coast mechanized salmon processing subcategory. 408.190...SOURCE CATEGORY West Coast Mechanized Salmon Processing Subcategory § 408.190...description of the West Coast mechanized salmon processing subcategory. The...

  4. 40 CFR 408.190 - Applicability; description of the West Coast mechanized salmon processing subcategory.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...description of the West Coast mechanized salmon processing subcategory. 408.190...SOURCE CATEGORY West Coast Mechanized Salmon Processing Subcategory § 408.190...description of the West Coast mechanized salmon processing subcategory. The...

  5. 47 CFR 80.133 - Private coast stations using facsimile in Alaska.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 2011-10-01 2011-10-01 false Private coast stations using facsimile in Alaska...Requirements and Procedures Special Procedures-Private Coast Stations § 80.133 Private coast stations using facsimile in...

  6. 47 CFR 80.133 - Private coast stations using facsimile in Alaska.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 2010-10-01 2010-10-01 false Private coast stations using facsimile in Alaska...Requirements and Procedures Special Procedures-Private Coast Stations § 80.133 Private coast stations using facsimile in...

  7. 33 CFR 165.1711 - Security Zones; Waters of the Seventeenth Coast Guard District

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Zones; Waters of the Seventeenth Coast Guard District 165.1711 Section...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Limited Access Areas Seventeenth Coast Guard District § 165.1711...

  8. 78 FR 36664 - Safety Zone; Fifth Coast Guard District Fireworks Display, Currituck Sound; Corolla, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-19

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket Number...1625-AA00 Safety Zone; Fifth Coast Guard District Fireworks Display, Currituck Sound; Corolla, NC AGENCY: Coast Guard, DHS. ACTION: Temporary...

  9. 46 CFR 42.05-25 - Coast Guard District Commander or District Commander.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Coast Guard District Commander or District...Section 42.05-25 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...This Subchapter § 42.05-25 Coast Guard District Commander or...

  10. 33 CFR 1.01-50 - Delegation to District Commander, Seventeenth Coast Guard District.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...District Commander, Seventeenth Coast Guard District. 1.01-50 Section...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...District Commander, Seventeenth Coast Guard District. The Commandant...

  11. 33 CFR 8.1 - Functions of the Coast Guard Reserve.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Functions of the Coast Guard Reserve. 8.1 Section 8.1 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY GENERAL UNITED STATES COAST GUARD RESERVE § 8.1 Functions...

  12. 33 CFR 54.07 - Service of notice upon designated Coast Guard official.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Service of notice upon designated Coast Guard official. 54.07 Section...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Service of notice upon designated Coast Guard official. The notice and...

  13. 78 FR 38829 - Special Local Regulations; Recurring Marine Events in the Seventh Coast Guard District

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-28

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 100 [Docket No. USCG-2013-0387...Regulations; Recurring Marine Events in the Seventh Coast Guard District AGENCY: Coast Guard, DHS. ACTION: Notice of enforcement of...

  14. 78 FR 39595 - Safety Zone, Fifth Coast Guard District Firework Display, Pagan River; Smithfield, VA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-02

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2013-0473...1625-AA00 Safety Zone, Fifth Coast Guard District Firework Display, Pagan River; Smithfield, VA AGENCY: Coast Guard, DHS. ACTION: Temporary...

  15. 77 FR 31183 - Safety Zone, Temporary Change for Recurring Fireworks Display Within the Fifth Coast Guard...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-25

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2012-0097...Fireworks Display Within the Fifth Coast Guard District, Pamlico River and Tar River; Washington, NC AGENCY: Coast Guard, DHS. ACTION: Temporary...

  16. 33 CFR 8.5 - Regulations for the Coast Guard Reserve.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Regulations for the Coast Guard Reserve. 8.5 Section 8.5 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY GENERAL UNITED STATES COAST GUARD RESERVE § 8.5...

  17. 33 CFR 173.81 - Coast Guard forms for numbering and casualty reporting.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Coast Guard forms for numbering and casualty...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Certificate of Number § 173.81 Coast Guard forms for numbering and...

  18. 33 CFR 125.51 - Replacement of lost Coast Guard Port Security Card.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Replacement of lost Coast Guard Port Security Card. 125.51...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...125.51 Replacement of lost Coast Guard Port Security Card. (a)...

  19. 46 CFR 4.07-45 - Foreign units of Coast Guard, investigation by.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Foreign units of Coast Guard, investigation by. 4.07-45 Section 4.07-45 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...4.07-45 Foreign units of Coast Guard, investigation by....

  20. 33 CFR 165.518 - Security Zone; Waters of the Fifth Coast Guard District.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Security Zone; Waters of the Fifth Coast Guard District. 165.518 Section...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...and Limited Access Areas Fifth Coast Guard District § 165.518...

  1. 77 FR 31803 - Safety Zone for Fifth Coast Guard District Fireworks Display Currituck Sound; Corolla, NC

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-30

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket Number...1625-AA00 Safety Zone for Fifth Coast Guard District Fireworks Display Currituck Sound; Corolla, NC AGENCY: Coast Guard, DHS. ACTION: Notice of...

  2. 33 CFR 125.12 - Period of validity of Coast Guard Port Security Cards.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... false Period of validity of Coast Guard Port Security Cards. 125.12...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...125.12 Period of validity of Coast Guard Port Security Cards. (a)...

  3. 77 FR 14703 - Safety Zone, Temporary Change for Recurring Fireworks Display Within the Fifth Coast Guard...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-13

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2012-0097...Fireworks Display Within the Fifth Coast Guard District, Pamlico River and Tar River; Washington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of...

  4. 33 CFR 96.470 - How does the Coast Guard terminate an organization's authorization?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false How does the Coast Guard terminate an organization's authorization...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...S. § 96.470 How does the Coast Guard terminate an organization's...

  5. 33 CFR 140.101 - Inspection by Coast Guard marine inspectors or Minerals Management Service inspectors.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Inspection by Coast Guard marine inspectors or Minerals...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Inspections § 140.101 Inspection by Coast Guard marine inspectors or...

  6. 76 FR 69634 - Safety Zone; Temporary Change for Recurring Fireworks Display Within the Fifth Coast Guard...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-09

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2011-0978...Fireworks Display Within the Fifth Coast Guard District, Wrightsville Beach, NC AGENCY: Coast Guard, DHS. ACTION: Temporary...

  7. 49 CFR 850.25 - Coast Guard marine casualty investigation for the Board.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Coast Guard marine casualty investigation for...NATIONAL TRANSPORTATION SAFETY BOARD COAST GUARD-NATIONAL TRANSPORTATION SAFETY...CASUALTY INVESTIGATIONS § 850.25 Coast Guard marine casualty investigation...

  8. 78 FR 35756 - Special Local Regulations; Recurring Marine Events in the Seventh Coast Guard District

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-14

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 100 [Docket No. USCG-2013-0398...Regulations; Recurring Marine Events in the Seventh Coast Guard District AGENCY: Coast Guard, DHS. ACTION: Notice of enforcement of...

  9. 46 CFR 4.40-25 - Coast Guard marine casualty investigation for the Board.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Coast Guard marine casualty investigation for...Section 4.40-25 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...CASUALTIES AND INVESTIGATIONS Coast Guard-National Transportation...

  10. 46 CFR 50.10-5 - Coast Guard District Commander or District Commander.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Coast Guard District Commander or District...Section 50.10-5 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...This Subchapter § 50.10-5 Coast Guard District Commander or...

  11. 33 CFR 125.17 - Persons eligible for Coast Guard Port Security Cards.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... false Persons eligible for Coast Guard Port Security Cards. 125.17...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...125.17 Persons eligible for Coast Guard Port Security Cards....

  12. 33 CFR 125.11 - Form of Coast Guard Port Security Card.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Form of Coast Guard Port Security Card. 125.11...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...VESSELS § 125.11 Form of Coast Guard Port Security Card. The...

  13. 49 CFR 850.3 - Relationship to Coast Guard marine investigation regulations and procedures.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Relationship to Coast Guard marine investigation regulations...NATIONAL TRANSPORTATION SAFETY BOARD COAST GUARD-NATIONAL TRANSPORTATION SAFETY...INVESTIGATIONS § 850.3 Relationship to Coast Guard marine investigation...

  14. 78 FR 40399 - Safety Zone; Fifth Coast Guard District Fireworks Displays, Delaware River; Philadelphia, PA.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-05

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2013-0493...1625-AA00 Safety Zone; Fifth Coast Guard District Fireworks Displays, Delaware...Philadelphia, PA. AGENCY: Coast Guard, DHS. ACTION: Temporary...

  15. 78 FR 32219 - Safety Zone, Temporary Change for Recurring Fifth Coast Guard District Fireworks Displays, Middle...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-29

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket Number...Temporary Change for Recurring Fifth Coast Guard District Fireworks Displays, Middle...Baltimore County, MD AGENCY: Coast Guard, DHS. ACTION: Notice of...

  16. 46 CFR 2.95-1 - Certificates or documents issued by Coast Guard.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Certificates or documents issued by Coast Guard. 2.95-1 Section 2.95-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Certificates or documents issued by Coast Guard. (a) Certificates or...

  17. 78 FR 38837 - Safety Zone; Fifth Coast Guard District Fireworks Displays, Barnegat Bay; Barnegat Township, NJ

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-28

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2013-0431...1625-AA00 Safety Zone; Fifth Coast Guard District Fireworks Displays, Barnegat...Barnegat Township, NJ AGENCY: Coast Guard, DHS. ACTION: Temporary...

  18. 33 CFR 66.05-20 - Coast Guard-State agreements.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Coast Guard-State agreements. 66.05-20...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...to Navigation § 66.05-20 Coast Guard-State agreements....

  19. 33 CFR 173.79 - Expiration of Coast Guard certificate of number.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Expiration of Coast Guard certificate of number. 173...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Number § 173.79 Expiration of Coast Guard certificate of number. A...

  20. 32 CFR 700.602 - The Commandant of the Coast Guard.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... false The Commandant of the Coast Guard. 700.602 Section 700.602...OFFICIAL RECORDS The United States Coast Guard (When Operating as a Service in...700.602 The Commandant of the Coast Guard. (a) The Commandant of...

  1. 33 CFR 1.20-1 - Testimony by Coast Guard personnel and production of records.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Testimony by Coast Guard personnel and production of records...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...GENERAL PROVISIONS Testimony by Coast Guard Personnel and Production of...

  2. 77 FR 39174 - Safety Zone, Temporary Change for Recurring Fifth Coast Guard District Fireworks Displays...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-02

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2012-0227...Temporary Change for Recurring Fifth Coast Guard District Fireworks Displays, Cavalier...Virginia Beach, VA AGENCY: Coast Guard, DHS. ACTION: Temporary...

  3. 46 CFR 4.40-35 - Records of the Coast Guard and the Board.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Records of the Coast Guard and the Board. 4.40-35 Section 4.40-35 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...CASUALTIES AND INVESTIGATIONS Coast Guard-National Transportation...

  4. 33 CFR 8.3 - Organization of the Coast Guard Reserve.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Organization of the Coast Guard Reserve. 8.3 Section 8.3 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY GENERAL UNITED STATES COAST GUARD RESERVE § 8.3...

  5. 46 CFR 4.40-30 - Procedures for Coast Guard investigation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Procedures for Coast Guard investigation. 4.40-30 Section 4.40-30 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...CASUALTIES AND INVESTIGATIONS Coast Guard-National Transportation...

  6. Quantifying ecological, morphological, and genetic variation to delimit species in the coast horned

    E-print Network

    formation in the coast horned lizard (Phrynosoma coronatum) species complex by evaluat- ing a diversity in the coast horned lizard (PhrynosQuantifying ecological, morphological, and genetic variation to delimit species in the coast horned

  7. Impacts of Climate Change on the Coasts of Washington State

    Microsoft Academic Search

    Daniel D. Huppert; Amber Moore; Karen Dyson

    Abstract Climate change on the Washington coast will trigger significant physical and chemical stressors: (a) inundation of low-lying areas by high tides as sea level rises; (b) flooding of coasts during major storm events, especially near river mouths; (c) accelerated erosion of coastal bluffs; (d) shifting of beach profiles, moving the position of the Mean High Water line landward; (e)

  8. 31. COAST LANDSCAPE VIEW FROM VISTA POINT AT END OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    31. COAST LANDSCAPE VIEW FROM VISTA POINT AT END OF ENDERT'S BEACH ROAD (ABANDONED OLD HIGHWAY 101). NOTE CRESCENT CITY AT LEFT REAR. LOOKING NNW. - Redwood National & State Parks Roads, California coast from Crescent City to Trinidad, Crescent City, Del Norte County, CA

  9. 60 FR 13377 - Pacific Coast Groundfish Fishery; Gear Modification

    Federal Register 2010, 2011, 2012, 2013, 2014

    1995-03-13

    ...0648-AF38 Pacific Coast Groundfish Fishery; Gear Modification AGENCY: National Marine Fisheries...for commercial vertical hook-and- line gear that is closely tended in the Pacific Coast...effectiveness of minimum mesh size used in trawl gear, making trawl gear [[Page...

  10. OCEANIC SALINITIES OFF THE SOUTH ATLANTIC COAST OF

    E-print Network

    389 OCEANIC SALINITIES OFF THE SOUTH ATLANTIC COAST OF THE UNITED STATES Theodore N. Gill CRUISES 1 OCEANIC SALINITIES OFF THE SOUTH ATLANTIC COAST OF THE UNITED STATES, Theodore N. Gill CRUISES 1-9, 1953 Procedures 1 Sections 1 Areas 1 Seasons 2 Gener al 2 Acknowledgments 9 Literature cited 9 Salinity data

  11. PHOSPHORUS CONTENT OF WATERS ALONG THE WEST COAST OF FLORIDA

    E-print Network

    PHOSPHORUS CONTENT OF WATERS ALONG THE WEST COAST OF FLORIDA Marine Biological Laboratory WOODS PHOSPHORUS CONTENT OF WATERS ALONG THF WEST COAST OF FLORIDA Herbert Wo Graham, Fishery Biologist, John Mo, 195U #12;ABSTRACT The distribution of inorganic and total phosphorus in the waters along the west

  12. Programming Practices of Atlantic Coast Conference Wind Ensembles

    ERIC Educational Resources Information Center

    Wiltshire, Eric S.; Paul, Timothy A.; Paul, Phyllis M.; Rudnicki, Erika

    2010-01-01

    This study examined the programming trends of the elite wind bands/ensembles of the Atlantic Coast Conference universities. Using survey techniques previously employed by Powell (2009) and Paul (2010; in press), we contacted the directors of the Atlantic Coast Conference band programs and requested concert programs from their top groups for the…

  13. Precommercial Stocking Control of Coast Redwood at Caspar Creek, Jackson

    E-print Network

    Standiford, Richard B.

    Precommercial Stocking Control of Coast Redwood at Caspar Creek, Jackson Demonstration State Forest and control plots in the coast redwood (Sequoia sempervirens) forest type on the Jackson Demonstration State of Forestry and Fire Protection (CDF) and the USDA Forest Service - Redwood Sciences Lab. CDF has since

  14. 22. AERIAL VIEW TO NORTH OF ENTIRE COAST GUARD AIR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. AERIAL VIEW TO NORTH OF ENTIRE COAST GUARD AIR STATION SAN FRANCISCO, SHOWING BUILDING H AT LEFT AND BUILDING F AT UPPER LEFT. 30X24 inch black and white silver gelatin print. Photographers unknown. Date unknown. - U.S. Coast Guard Air Station San Francisco, Warehouse, 1020 North Access Road, San Francisco, San Francisco County, CA

  15. 6. AERIAL VIEW TO NORTHWEST OF NORTH PART OF COAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. AERIAL VIEW TO NORTHWEST OF NORTH PART OF COAST GUARD AIR STATION SAN FRANCISCO. 8X10 black and white silver gelatin print. Photographer unknown. Date unknown. - U.S. Coast Guard Air Station San Francisco, 1020 North Access Road, San Francisco, San Francisco County, CA

  16. 21. AERIAL VIEW TO SOUTHWEST OF ENTIRE COAST GUARD AIR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. AERIAL VIEW TO SOUTHWEST OF ENTIRE COAST GUARD AIR STATION SAN FRANCISCO, SHOWING BUILDING F AT RIGHT AND BUILDING H (HAER No. CA-329-B) AT UPPER LEFT. 30X24 inch black and white silver gelatin print. Photographers unknown. Date unknown. - U.S. Coast Guard Air Station San Francisco, Warehouse, 1020 North Access Road, San Francisco, San Francisco County, CA

  17. 20. AERIAL VIEW TO NORTHEAST OF NORTH PART OF COAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. AERIAL VIEW TO NORTHEAST OF NORTH PART OF COAST GUARD AIR STATION SAN FRANCISCO. 30X20 inch black and white silver gelatin print. Photographers unknown. Date unknown. - U.S. Coast Guard Air Station San Francisco, Warehouse, 1020 North Access Road, San Francisco, San Francisco County, CA

  18. Regional Industry Workforce Development: The Gulf Coast Petrochemical Information Network

    ERIC Educational Resources Information Center

    Hodgin, Johnette; Muha, Susan

    2008-01-01

    The Gulf Coast Petrochemical Information Network (GC-PIN) is a workforce development partnership among industry businesses and area institutions of higher education in the four-county Gulf Coast region. GC-PIN partners develop new industry-specific curricula, foster industry career awareness, and retrain existing employees in new technologies.

  19. Results Of The National Benthic Surveillance Project (Pacific Coast): 1987

    Microsoft Academic Search

    Bruce B. McCain; Sin-Lam Chan; Margaret M. Krahn; Donald W. Brown; Mark S. Myers; John T. Landahl; Susan Pierce; Robert C. Clark; Usha Varanasi

    1989-01-01

    During the fourth year (1987) of the Pacific Coast portion of the National Benthic Surveillance Project (NBSP), a multiyear study of chemical contaminants and associated fish diseases at selected sites on the Pacific Coast of the United States, two embayments (San Diego Bay and San Francisco Bay) were selected for more intensive sampling in order to evaluate the magnitude of

  20. U.S. Coast Guard Polar Icebreaker Operations

    E-print Network

    Kuligowski, Bob

    U.S. Coast Guard Polar Icebreaker Operations 10 June 2009 CDR Lisa Mack #12;Overview Operating, Waterways & Coastal Security Defense Readiness #12;Polar Icebreaker Fleet POLAR STAR, POLAR SEA and HEALY sovereignty, and a range of Coast Guard statutory missions to be required in the future. Polar icebreaker

  1. Learning about geological events in Vendée (west coast of France)

    NASA Astrophysics Data System (ADS)

    Bretaudeau, Florence; Lavigne, Bruno

    2015-04-01

    Our 70 pupils, aged from 17 to 18 had discovered an area of the west coast of France : Vendée. We studied rocks in order to tell the geological story of this area. Several characteristics were looked at : sedimentary and metamorphics rocks, minerals, fault, folding, unconformability... We took advantage of this geological journey to look at biodiversity in different ecosystems : rocky coast, dune, wood.

  2. 50 CFR 600.1102 - Pacific Coast groundfish fee.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...reduction loan financing the Pacific Coast Groundfish Program...for coastal Dungeness crab and ocean pink shrimp in the State of...trawl fishery under the Federal Pacific Coast Groundfish Fishery Management...426, and (vi) Washington ocean pink shrimp fee-share...

  3. 50 CFR 600.1102 - Pacific Coast groundfish fee.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...reduction loan financing the Pacific Coast Groundfish Program...for coastal Dungeness crab and ocean pink shrimp in the State of...trawl fishery under the Federal Pacific Coast Groundfish Fishery Management...426, and (vi) Washington ocean pink shrimp fee-share...

  4. 50 CFR 600.1102 - Pacific Coast groundfish fee.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...reduction loan financing the Pacific Coast Groundfish Program...for coastal Dungeness crab and ocean pink shrimp in the State of...trawl fishery under the Federal Pacific Coast Groundfish Fishery Management...426, and (vi) Washington ocean pink shrimp fee-share...

  5. JACK MACKEREL EGGS PACIFIC COAST, 1951-5

    E-print Network

    JACK MACKEREL EGGS PACIFIC COAST, 1951-5 SPECIAL SCIENTIFIC REPORT- FISHERIES No. 263 UNITED STATES Report--Fisheries No. 263 Washington, D. C, July 1958 #12;JACK MACKEREL EGGS, PACIFIC COAST, 1951-54 By David A. Farris CONTENTS Page Area covered 2 Methods of sampling 2 The stages of jack mackerel egg

  6. The politics of food production: a comparative study of the agricultural development policies of five African nations. 

    E-print Network

    Wallis, Leslie Jean

    1975-01-01

    Nations. (August 1975) Leslie J Wallis, B. A. ~ Tarkio College Chairman of Advisory Committee: Dr. Kwang Ro is study examines ano compares various inputs to increase food production in the Ivory Coast, Kenya, Nigeria, Tanzania, and Zambia... ' AN EXANINATION OF FIVE AFRICAN NATIONS ~ , . ~ ~ ~ 27 The Ivory Coast Kenya. Nigeria Tanzania. Zambia 27 38 54 73 87 CHAPTER II1 PROSPECTS FOR THE FUTURE 106 The Ivory Coast Kenya. Nigeria. Tanzania Zambia 107 ill 115 118 122 REFERENCES ~ 129...

  7. Marine West Coast Forests, Chapter 9

    USGS Publications Warehouse

    Perakis, Steven S.; Geiser, Linda H.; Lilleskov, Erik A.

    2011-01-01

    Human activities have greatly increased nitrogen emissions and deposition across large areas of Earth. Although nitrogen is an essential nutrient for plant growth, too much nitrogen in excess of critical loads leads to losses of biodiversity, soil and stream acidification, nutrient imbalances, and other deleterious effects. In a new report quantifying critical loads of nitrogen deposition across the United States, USGS scientist Steve Perakis and co-authors provided a chapter about responses of marine west coast forests. Much of this region is understudied with respect to nitrogen deposition, and in this chapter the authors identify known adverse effects and estimate critical loads of nitrogen deposition for western Oregon and Washington and southeast Alaska forests. Perakis also contributed to the synthesis chapter, which includes background, objectives, advantages and uncertainties of critical loads, an overview of critical loads across U.S. ecoregions, and other topics.

  8. Gulf Coast Addiction Technology Transfer Center

    NSDL National Science Digital Library

    2012-01-01

    Based at the University of Texas at Austin, the Gulf Coast Addiction Technology Transfer Center (GCATTC) is one of 14 such regional university centers in the United States. The Center's work includes creating high-quality training materials for health care professionals, convening research conferences, and providing technical assistance to state agencies and providers. On the website, visitors can learn about research projects, pilot programs for transforming mental health service delivery programs, and work on the abuse of prescription drugs. The left-hand side of the page includes sections like Grant Writing, Products, and Offender Education Programs. In the Products area, visitors can look over publications and presentations by Center staff and also view a list of resources for treatment of substance use disorders.

  9. 77 FR 58175 - Resale Royalty Right

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-19

    ...Chile, Congo, Columbia, Costa Rica, Croatia, Ecuador, Guatemala, Guinea, Hondorus, Iraq, Ivory Coast, Laos, Madagascar, Mali, Mexico, Monaco, Morocco, Nicaragua, Paragua, Panama, Peru, Peru, Philippines, Romania, Russian...

  10. Geothermal structure of Australia's east coast basins

    NASA Astrophysics Data System (ADS)

    Danis, C. R.; O'Neill, C.

    2010-12-01

    The east coast sedimentary basins of Australia formed on an active margin of eastern Gondwana, and constitute an important hydrocarbon resource. The 1600km long Sydney-Gunnedah-Bowen Basin (SGBB) is largest east coast basin system, with thick Permian to Jurassic sedimentary successions overlying Palaeozoic basement rocks. The SGBB has been the focus of renewed geothermal exploration interest, however, the thermal state and geothermal potential of the system is largely unconstrained. Geothermal exploration programs require an accurate estimate of subsurface temperature information, in addition to favourable geology, to make informed decisions on potential targe developments. Primarily temperature information comes from downhole measurements, generally non-equilibrated, which are traditionally extrapolated to depth, however such extrapolation does not take into account variations in geological structure or thermal conductivity. Here we import deep 3D geological models into finite element conduction simulations, using the code Underworld, to calculate the deep thermal structure of the basin system. Underworld allows us to incorporate complex, detailed geological architecture models, incorporating different material properties for different layers, with variable temperature and depth-dependent properties. We adopt a fixed top boundary temperature on a variable topographic surface, and vary the bottom surface boundary condition, to converge of models which satisfy equilibrated downhole temperature measurement constraints. We find coal plays an important role in insulating sedimentary basins. Heat refracts around the coal interval and produces elevated temperatures beneath thick sediments, especially where thick coal intervals are present. This workflow has been formalized into an Underworld geothermal model library, enabling model centric computational workflows. Using the imported model architecture from the geology, data can be continuously updated and added to the system and models quickly re-run to take advantage of the most up to date information. The thermal models we’ve produced for the SGBB are an efficient regional assessment of the geothermal resource potential in this basin system.

  11. Comparison of somatic reversions between the ivory allele and transposon-caused mutant alleles at the white locus of Drosophila melanogaster after larval treatment with X rays and ethyl methanesulfonate

    SciTech Connect

    Ryo, H.; Yoo, M.A.; Fujikawa, K.; Kondo, S.

    1985-07-01

    Somatic reversion of strains with the ivory (wi) allele, a mutation associated with a tandem duplication of a DNA sequence at the white locus, increased with the age of larvae at the time of X-irradiation as expected from the increase in the number of target cells. In contrast, two independently isolated strains with unstable w+ loci associated with insertion of transposable elements showed higher reversion frequencies after treatment with X rays or ethyl methanesulfonate (EMS) at early larval stages than at late stages. Nevertheless, both the wi strain and the two unstable w+ strains reverted at nearly equal rates after treatment with X rays or EMS at early larval stages. Possible similarity in hot spot structure for the high reversibility of the two types of mutations is discussed in relation to production of presumed mutator-type cofactors specific to the transposon-caused mutations at early larval stages.

  12. Genetically distinct coelacanth population off the northern Tanzanian coast.

    PubMed

    Nikaido, Masato; Sasaki, Takeshi; Emerson, J J; Aibara, Mitsuto; Mzighani, Semvua I; Budeba, Yohana L; Ngatunga, Benjamin P; Iwata, Masamitsu; Abe, Yoshitaka; Li, Wen-Hsiung; Okada, Norihiro

    2011-11-01

    Since the sensational discovery of a living coelacanth off the east coast of South Africa, the geographic distribution of viable coelacanth populations has been a subject of debate. In the past, the coelacanths off the African mainland were thought to be strays from the Comoros because most coelacanths captured were caught in the waters surrounding the Comoros archipelagos. However, in recent years, a large number of coelacanths were captured off the coast of Tanzania, including nine living specimens observed in a remotely operated vehicles survey. Thus, it is possible that there is a reproducing population inhabiting waters off the Tanzania coast. We have sequenced the complete mitochondrial genomes of 21 Tanzanian and 2 Comoran coelacanths and analyzed these sequences together with two additional full mitochondrial genomes and 47 d-loop sequences from the literature. We found that the coelacanth population off the northern Tanzanian coast is genetically differentiated from those of the southern Tanzania coast and the Comoros, whereas no significant genetic differentiation occurs between the latter two localities. The differentiation between the northern and southern Tanzanian coast populations is consistent with the hypothesis that the existence of northward-flowing ocean current along the Tanzanian coast may reduce or prevent gene flow from the northern to the southern population. Finally, we estimated that the population localized to the southern Tanzanian coast and the Comoros diverged from other coelacanths at least 200,000 y ago. These results indicate that the coelacanths off the northern Tanzania coast are not strays but a genetically distinct group. Our study provides important information for the conservation of this threatened "living fossil." PMID:22025696

  13. Opening up the Ivory Tower.

    PubMed

    Wilan, Ken Howard

    2007-06-01

    Big pharma is increasingly looking to academia for new drug leads and technologies; meanwhile universities are being forced to look beyond the National Institutes of Health (NIH) for funding. This mutual attraction-out-of-necessity is helping to forge new bonds between industry and academia. PMID:17540161

  14. Caring in the Ivory Tower

    ERIC Educational Resources Information Center

    O'Brien, Leigh M.

    2010-01-01

    In this paper I argue that the teacher educators who deliberately create and nurture caring teacher-student relationships, despite the many challenges, benefit both themselves and their students in several ways. Although the notion that teachers should care for their students is not new, it may well be that professors too seldom "communicate"…

  15. Ocean bottom gravimetry near the coast

    NASA Astrophysics Data System (ADS)

    Fujimoto, H.; Kanazawa, T.; Oshida, A.

    2008-12-01

    Inland earthquakes have recently caused damages in the Japanese Islands. Although more than 2,000 active faults have been recognized in and around Japan, the earthquakes had their sources in unexpected faults in the upper crust. Detecting such hidden active faults has become an important subject in the field of earth sciences. Precise gravimetry, a basic geodetic measurement, is now recognized as one of important means for detecting active faults hidden under the ground. Precise and dense gravimetry has covered the Japanese Islands, but not in the offshore area. The most critical point is that there are no gravity data in the offshore area near the coast; the area has not been included in land nor marine gravity mapping. An ocean bottom gravimeter (OBG) was developed in Earthquake Research Institute, University of Tokyo, for gravimetry on the deep seafloor (Fujimoto et al., 1998). Free gimbal suspensions with an oil damper keep a sensor package of Scintrex CG-3M/SB gravimeter roughly vertical, typically in a few tens arc-seconds, and the effect of the remaining tilt is numerically corrected by the gravimeter. The gimbals and the sensor are in a pressure-tight spherical housing made of titanium alloy, and the logging unit in a glass sphere. Two trial measurements on the shallow seafloor in Suruga Bay showed that precision of seafloor gravimtery with the OBG is much the same that with field gravimeters on land (Fujimoto et al., 1998). The importance of gravity mapping over the shallow ocean bottom near the coast was recognized and there were requests to use our OBG for such observations. Then we modify the OBG system into a single housing for easy maintenance and measurement. Ocean bottom gravity measurements with the OBG have been carried out around Awaji Island near Kobe, off the northern end of Tohoku, off Niigata, and in the Seto Inland Sea. The OBG was lowered from a boat to each gravity point on the bottom with a rope. Judging from the observed data, precision of gravimetry depends on the condition of the OBG on the bottom. Unless the rope disturbed the OBG, the performance was much the same with gravimetry on land. The observed data and operation for the measurements will be reported.

  16. Progression and Behavior of the Canoe Fire in Coast Redwood1

    E-print Network

    Standiford, Richard B.

    Progression and Behavior of the Canoe Fire in Coast Redwood1 Hugh Scanlon2 Abstract Lightning caused fires occur in coast redwood forests, but large fires have been rare since the 1930s. Coast State Park, became the largest recorded fire in old-growth coast redwood (Sequoia sempervirens) since

  17. 33 CFR 1.26-10 - Sales to Coast Guard Auxiliary.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Sales to Coast Guard Auxiliary. 1.26-10 Section 1.26-10... § 1.26-10 Sales to Coast Guard Auxiliary. (a) The provisions of Title 14...Coast Guard to furnish the Coast Guard Auxiliary such items as flags, pennants,...

  18. Power extraction from an oscillating water column along a coast

    E-print Network

    Martins-rivas, Hervé

    2008-01-01

    For reasons of wave climate, geography, construction, maintenance, energy storage and transmission, some devices for extracting energy from sea waves will likely be installed on the coast. We study here the specific case ...

  19. An Equal Opportunity Institution Gulf Coast Research and Education Center

    E-print Network

    Watson, Craig A.

    Engineering (water specialists), Agricultural Education and Communication (social marketing and program: Gulf Coast Research and Education Center University of Florida Institute of Food and Agricultural that will be 70% research (Florida Agricultural Experiment Station) and 30% extension (Florida Cooperative

  20. A PROBABILISTIC SURVEY OF SEDIMENT TOXICITY IN WEST COAST ESTUARIES

    EPA Science Inventory

    A probabalistic survey of coastal condition assessment was conducted in 1999 by participants in US EPA's Environmental Monitoring and Assessment Program (EMAP). The survey targeted estuaries along the outer coasts of Washington, Oregon and California, including the lower Columbi...

  1. PARTS WASHING ALTERNATIVES STUDY - UNITED STATES COAST GUARD

    EPA Science Inventory

    This report has been written to assist the United States Coast Guard (USCG) industrial managers in determining the most cost effective and environmentally acceptable parts washing alternatives for their specific applications. An; evaluation was conducted on four different cleane...

  2. Totemic medicine among the American Indians of the northwest coast.

    PubMed

    Gunn, S W

    1995-09-01

    A description is presented of the medical beliefs of the totemic people on the Northwest American coast. The principles of Shamanic therapy are analysed. The consequences for therapeutic views by medical schools are discussed. PMID:7494716

  3. Characterization of Sea Turtle Nesting on the Upper Texas Coast 

    E-print Network

    Hughes, Christi Lynn

    2014-05-06

    Nearly annual record Kemp’s ridley sea turtle (Lepidochelys kempii) nesting activity on the upper Texas coast (UTC; defined as beaches from Sabine Pass to Matagorda Peninsula), where scientifically verifiable nesting commenced in 2002, has occurred...

  4. PARTS WASHING ALTERNATIVES STUDY - UNITED STATES COAST GUARD

    EPA Science Inventory

    This report has been written to assist the United States Coast Guard (USCG) industrial managers in determining the most cost effective and environmentally acceptable parts washing alternatives for their specific applications. n evaluation was conducted on four different cleaners ...

  5. CONTROLS ON WATER CHEMISTRY OF AN OREGON COAST RANGE STREAM

    EPA Science Inventory

    Numerous factors may control losses of dissolved nutrients from forested basins in the Oregon Coast Range. Potentially important factors include forest composition, stand age, forest management, grazing, agriculture, sewage inputs and bedrock types, as well as others perhaps not...

  6. Retro-action model for the erosion of rocky coasts

    NASA Astrophysics Data System (ADS)

    Sapoval, B.; Baldassarri, A.

    2009-12-01

    Rocky coasts are estimated to represent 75% of the world’s shorelines [1]. We discuss various situations where the formation of rocky coast morphology could be attributed to the retro-action of the coast morphology on the erosive power of the see. In the case of rocky coasts, erosion can spontaneously create irregular seashores. But, in turn, the geometrical irregularity participates to the damping of sea-waves, decreasing the average wave amplitude and erosive power. There may then exist a mutual self-stabilization of the waves amplitude together with the irregular morphology of the coast. A simple model of such stabilization is discussed. It leads, through a complex dynamics of the earth-sea interface, to the spontaneous appearance of an irregular sea-shore. The final coast morphology is found to depend on the morphology/damping coupling of the coast and on the possible existence of built-in correlations within the coast lithologic properties. This is illustrated in the figure. In the limit case where the morphology/damping coupling is weak and when the earth lithology distribution exhibit only short range correlations, the process spontaneously build fractal morphologies with a dimension close to 4/3 [2]. It is shown that this dimension refers to the dimension of the so-called accessible perimeter in gradient percolation. However, even rugged but non-fractal sea-coasts morphology may emerge for strong damping or during the erosion process. When the distributions of the lithologies exhibit long range correlations, a variety of complex morphologies are obtained which mimics observed coastline complexity, well beyond simple fractality. On a somewhat different perspective, the design of breakwaters is suggested to be improved by using global irregular geometry with features sizes of the order of the wave-length of the sea oscillations. [1] R. A. Davis, Jr, D. M. Fitzgerald, Beaches and Coasts,(Blackwell, Oxford 2004). [2] B. Sapoval, A. Baldassarri, A. Gabrielli, Self-stabilized Fractality of Sea-coasts through Erosion, Phys. Rev. Lett. 93, 098501 (2004). Time evolution of the coastline morphology starting with a flat sea-shore. Left and right columns correspond respectively to weak and strong coupling. Top to bottom: suc- cessive morphologies with the final morphologies at the bottom.

  7. View of the Caribbean coast of Venezuela

    NASA Technical Reports Server (NTRS)

    1973-01-01

    A near vertical view of the Caribbean coast of Venezuela is seen in this Skylab 3 Earth Resources Experiment Package S190-B (five-inch earth terrain camera) photograph taken from the Skylab space station in Earth orbit. The large body of water is the Golfo de Venezuela; and the major land mass is the Peninsula de Paraguana. The view is looking northward from the mouth of the Golfete de Coro and Punta Cardon to Punta Macolia. The peninsula is connected to the Venezuelan mainland by the narrow strip of land in the most easterly corner of the picture. The dry, arid climate of the peninsula is indicated by sparse vegetation and the abundance of sand dunes. The highest point is about 2,700 feet above the sea and is the conspicuous black spot. Old raised shorelines features appear as streaks parallel to the Golfete de Coro. Water of the Golfete de Coro is red from the high sediment content. The streaks in the water off the peninsula is apparently an effect of wind which is blowing sand and w

  8. Glaciations of the West Coast Range, Tasmania

    NASA Astrophysics Data System (ADS)

    Colhoun, Eric A.

    1985-07-01

    Geomorphic, stratigraphic, palynologic and 14C evidence indicates that the West Coast Range, Tasmania, was glaciated at least three times during the late Cenozoic. The last or Margaret Glaciation commenced after 30,000 yr B.P., culminated about 19,000 yr B.P., and ended by 10,000 yr B.P. During this period a small ice cap, ca. 250 m thick, and cirque and valley glaciers covered 108 km 2. The glacial deposits show little chemical weathering or erosional dissection. The snow line ranged from 690 to 1000 m with an average of 830 m for the ice cap. Mean temperature was 6.5°C below the present temperature. During the preceding Henty Glaciation a 300- to 400-m-thick ice cap and outlet glaciers exceeded 1000 km 2. The glacial deposits are beyond 14C assay. They are more weathered chemically and more dissected than Margaret age deposits, and the degree suggests a pre-last interglaciation age (> 130,000 yr B.P.). The snow line of the ice cap lay at 740 m, and annual temperature was reduced by 7°C. Ice of the earliest Linda Glaciation slightly exceeded that of the Henty Glaciation but had a similar distribution. The glacial deposits are intensely weathered, have reversed magnetization, and overlie a paleosol containing pollen of Tertiary type. An early Pleistocene or Tertiary age is indicated.

  9. US west coast revisited: An aeromagnetic perspective

    SciTech Connect

    Zietz, I.; Johnson, P.R. (George Mason Univ., Fairfax, VA (USA)); Bond, K.R. (Geological Survey, Reston, VA (USA))

    1990-04-01

    A new compilation of magnetic data for the western conterminous United States and offshore areas provides significant information about crustal units and structures in the region. Features shown on the compilation include a magnetic quiet zone along the coast and two lineaments inland. The magnetic quiet zone correlates with the accretionary prism at the western edge of the North American plate and overlies subducted ocean crust; abrupt termination of ocean-floor magnetic anomalies at, or a short distance east of, the toe of the accretionary prism is an inferred effect subduction-induced low-temperature metamorphism of the ocean crust. The Puget Lowlands-San Joaquin lineament is an alignment of high-intensity magnetic anomalies that in the south, and possibly also in the north, are cause by bodies of mafic-ultramafic rocks accreted to North America during the Mesozoic and Tertiary. The lineup of the highs and the inferred lineup of the causative bodies may reflect fundamental structures that control Mesozoic and Tertiary evolution of the continental margin. The Mojave Desert lineament, a distinctive chain of short-wavelength magnetic anomalies in southern California, coincides partly with a zone of Mesozoic intrusions and the Cenozoic San Andreas fault system, but is likely to be older than both in origin and may reflect a Mesozoic or older crustal discontinuity.

  10. Impact of prescribed burning on Gulf Coast tick populations

    E-print Network

    Oldham, Thomas Walter

    1983-01-01

    on the Gulf Coast tick in its native habitat. Objectives for this study were: 1) Determine the acute impacts of prescribed burning of selected rangeland vegetation stands on tick populations; 2) Correlate fire-induced changes in the micro- environment.... ), shoregrass (Monanthochloe littoralis Engelm. ), bitter panicum (Panicum amarum Ell. ), and seashore d p d (~SN( ~ii i (L. ] K th) i q t 1 g 1 t shorelines and magshes. Samuel and Trainer (1970) determined that the Gulf Coast tick was most abundant...

  11. 22. AERIAL VIEW OF SOUTH PART OF THE COAST GUARD ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. AERIAL VIEW OF SOUTH PART OF THE COAST GUARD AIR STATION SAN FRANCISCO, SHOWING PART OF BUILDING H IN THE LOWER RIGHT CORNER (DOES NOT SHOW BUILDING F). 30X24 inch black and white silver gelatin print. Photographer unknown. Date unknown. 304 - U.S. Coast Guard Air Station San Francisco, Bachelor Officer Quarters, 1020 North Access Road, San Francisco, San Francisco County, CA

  12. Geographic signatures of North American West Coast estuaries

    Microsoft Academic Search

    Robert Emmett; ROBERTO LLANSO ´; Jan Newton; Ron Thom; Michelle Hornberger; Cheryl Morgan; Colin Levings; Andrea Copping; Paul Fishman

    2000-01-01

    West Coast estuaries are geologically young and composed of a variety of geomorphological types. These estuaries range from\\u000a large fjords to shallow lagoons; from large to low freshwater flows. Natural hazards include E1 Niños, strong Pacific storms,\\u000a and active tectonic activity. West Coast estuaries support a wide range of living resources: five salmon species, harvestable\\u000a shellfish, waterfowl and marine birds,

  13. US Army Corps of Engineers Western Mountains, Valleys, and Coast Version 2.0 WETLAND DETERMINATION DATA FORM Western Mountains, Valleys, and Coast Region

    E-print Network

    US Army Corps of Engineers

    US Army Corps of Engineers Western Mountains, Valleys, and Coast ­ Version 2.0 WETLAND of Engineers Western Mountains, Valleys, and Coast ­ Version 2.0 SOIL Sampling Point: Profile Description Deposits (B2) Hydrogen Sulfide Odor (C1) Saturation

  14. USGS "iCoast - Did the Coast Change?" Project: Crowd-Tagging Aerial Photographs to Improve Coastal Change Prediction Models

    NASA Astrophysics Data System (ADS)

    Liu, S. B.; Poore, B. S.; Plant, N. G.; Stockdon, H. F.; Morgan, K.; Snell, R.

    2014-12-01

    The U.S. Geological Survey (USGS) has been acquiring oblique aerial photographs of the coast before and after major storms since 1995 and has amassed a database of over 140,000 photographs of the Gulf, Atlantic, and Pacific coasts. USGS coastal scientists use these photographs to document and characterize coastal change caused by storms. The images can also be used to evaluate the accuracy of predictive models of coastal erosion. However, the USGS does not have the personnel to manually analyze all of the photographs taken after a storm. Also, computers cannot yet automatically identify damages and geomorphic changes to the coast from the oblique aerial photographs. There is a high public interest in accessing the limited number of pre- and post-storm photographic pairs the USGS is currently able to share. Recent federal policies that encourage open data and open innovation initiatives have resulted in many federal agencies developing new ways of using citizen science and crowdsourcing techniques to share data and collaborate with the public to accomplish large tasks. The USGS launched a crowdsourcing application in June 2014 called "iCoast - Did the Coast Change?" (http://coastal.er.usgs.gov/icoast) to allow citizens to help USGS scientists identify changes to the coast by comparing USGS aerial photographs taken before and after storms, and then selecting pre-defined tags like "dune scarp" and "sand on road." The tags are accompanied by text definitions and pictorial examples of these coastal morphology terms and serve to informally and passively educate users about coastal hazards. The iCoast application facilitates greater citizen awareness of coastal change and is an educational resource for teachers and students interested in learning about coastal vulnerability. We expect that the citizen observations from iCoast will assist with probabilistic model development to produce more accurate predictions of coastal vulnerability.

  15. Sequestration Options for the West Coast States

    SciTech Connect

    Myer, Larry

    2006-04-30

    The West Coast Regional Carbon Sequestration Partnership (WESTCARB) is one of seven partnerships that have been established by the U.S. Department of Energy (DOE) to evaluate carbon capture and sequestration (CCS) technologies best suited for different regions of the country. The West Coast Region comprises Arizona, California, Nevada, Oregon, Washington, Alaska, and British Columbia. Led by the California Energy Commission, WESTCARB is a consortium of about 70 organizations, including state natural resource and environmental protection agencies; national laboratories and universities; private companies working on carbon dioxide (CO{sub 2}) capture, transportation, and storage technologies; utilities; oil and gas companies; nonprofit organizations; and policy/governance coordinating organizations. Both terrestrial and geologic sequestration options were evaluated in the Region during the 18-month Phase I project. A centralized Geographic Information System (GIS) database of stationary source, geologic and terrestrial sink data was developed. The GIS layer of source locations was attributed with CO{sub 2} emissions and other data and a spreadsheet was developed to estimate capture costs for the sources in the region. Phase I characterization of regional geological sinks shows that geologic storage opportunities exist in the WESTCARB region in each of the major technology areas: saline formations, oil and gas reservoirs, and coal beds. California offers outstanding sequestration opportunities because of its large capacity and the potential of value-added benefits from enhanced oil recovery (EOR) and enhanced gas recovery. The estimate for storage capacity of saline formations in the ten largest basins in California ranges from about 150 to about 500 Gt of CO{sub 2}, the potential CO{sub 2}-EOR storage was estimated to be 3.4 Gt, and the cumulative production from gas reservoirs suggests a CO{sub 2} storage capacity of 1.7 Gt. A GIS-based method for source-sink matching was implemented and preliminary marginal cost curves developed, which showed that 20, 40, or 80 Mega tonnes (Mt) of CO{sub 2} per year could be sequestered in California at a cost of $31/tonne (t), $35/t, or $50/t, respectively. Phase I also addressed key issues affecting deployment of CCS technologies, including storage-site monitoring, injection regulations, and health and environmental risks. A framework for screening and ranking candidate sites for geologic CO{sub 2} storage on the basis of HSE risk was developed. A webbased, state-by-state compilation of current regulations for injection wells, and permits/contracts for land use changes, was developed, and modeling studies were carried out to assess the application of a number of different geophysical techniques for monitoring geologic sequestration. Public outreach activities resulted in heightened awareness of sequestration among state, community and industry leaders in the Region. Assessment of the changes in carbon stocks in agricultural lands showed that Washington, Oregon and Arizona were CO{sub 2} sources for the period from 1987 to 1997. Over the same period, forest carbon stocks decreased in Washington, but increased in Oregon and Arizona. Results of the terrestrial supply curve analyses showed that afforestation of rangelands and crop lands offer major sequestration opportunities; at a price of $20 per t CO{sub 2}, more than 1,233 MMT could be sequestered over 40-years in Washington and more than 1,813 MMT could be sequestered in Oregon.

  16. Platinum group elements provide no indication of a meteoritic component in ICDP cores from the Bosumtwi crater, Ghana

    NASA Astrophysics Data System (ADS)

    Goderis, S.; Tagle, R.; Schmitt, R. T.; Erzinger, J.; Claeys, P. H.

    In an attempt to identify the type of projectile, 14 samples from the Bosumtwi crater in Ghana were analyzed for platinum group element (PGE) concentrations by nickel sulfide fire assay inductively coupled plasma-mass spectrometry (ICP-MS). The majority of the samples come from the impactite material recovered by cores LB-07A and LB-08A, which were drilled by the International Continental Scientific Drilling program (ICDP). One sample originates from the fallback material found at the contact between the impactite and the overlying lake sediment in core LB-05B. No clear signature of a meteoritic contamination was identified in the 13 impactite samples. The target rock apparently dominates the PGE contribution in the impactites. These results agree with the PGE concentrations reported for the suevites collected at the crater rim and in other parts of the Bosumtwi ICDP cores. However, based on Cr and Os isotopic signatures, a meteoritic component could be present in the sample of fallback material, supporting the reports of the existence of meteoritic material in the Ivory Coast tektites. Further analyses of the fallback material from the Bosumtwi drill cores should confirm (or not) this first result.

  17. Paleomagnetic and Mineral-Magnetic Results From the Lake Bosumtwi Drilling Project

    NASA Astrophysics Data System (ADS)

    King, J. W.; Heil, C. W.; Peck, J. A.

    2008-12-01

    Lake Bosumtwi is an impact crater lake located at 6.5ºN and 1.5ºW in Ghana. The Bosumtwi impact event and the Ivory Coast tektite strewn field generated by the event have an age of 1.07 Myr. The lake contains an approximately 300m sedimentary section that provides a nearly continuous stratigraphy of this interval. In addition, the majority of the section is annually laminated. Advantages of magnetic studies of Lake Bosumtwi sediments include: (1) duplicate drill holes; (2) high sedimentation rates; (3) laminations allow assessmet of core disturbance; and (4) sediments record polarity transitions, excusions, and possibly paleointensity at a low-latitude site; and (5) Milankovitch and sub- Milankovitch scale paleoclimate variations. Challenges include: (1) low-latitude site location makes it difficult to recognize excursions and polarity transitions; (2) anoxia that produces annual laminations also causes some reductive diagenesis; and (3) some intervals are weakly magnetic and have noisy data. Overall, with respect to its magnetic record, Lake Bosumtwi is neither a "silk purse," nor a "sows ear." We will detail our efforts to maximize the former and minimize the latter.

  18. Rock coasts and seabird breeding sites : a common optimization

    NASA Astrophysics Data System (ADS)

    Marie, Eveillard-Buchoux

    2014-05-01

    The North-West coasts of Europe support a lot of part of Northern hemisphere breeding seabirds. In that context, Scotland has a preponderant place and Brittany has southernmost limit of these species areas, for most of them. Outside the breeding season these species live mainly on the open sea and when they do visit the land to breed, they nest on a specific sites : almost all the time they breed on the rock coasts, often on seacliffs. This specific habitat are defines by geomorphological characteristics which offer special forms of the coast. The forms of rock coasts are originally and different because of several proprieties of geology, of lithology, of structures. Breeding seabird, occupying these sites, reveals, in a new light, the richness of these forms and the originals geographic location of the coastline : seabirds prefer nest in exposed coastline like rock caps, rocky points or islands. Seabirds and rock coasts are research topics in environmental geography since several years. However, these combination studies is a new approach in this field and enlargement in the heritage field allows supplement scientific approach. For example, it show that in most important touristic sites, environmental protection measures focused on landscape, habitat or bird, but much more rarely on rock coasts for these intrinsic values. Indeed, in Brittany or in Scotland, seabirds are often stars species in lot of coastal nature reserves, where they're considered like greater ecological heritage. We could see it in touristic promotion field : bird is everywhere, cliff is mostly kept in the dark, as well in leaflets as in speech visitor's guides - without, for example, as a part of this landscape. In all cases, combination of these two heritages is extremely rare. Yet, this current research illustrates the interest and the issue of development of this comparative approach seabirds / rock coasts for optimization of nature tourism and geotourism.

  19. Aftermath of Hurricane Ike along Texas Coast

    NASA Technical Reports Server (NTRS)

    2008-01-01

    Three weeks after Hurricane Ike came ashore near Galveston, TX, residents returned to find their houses in ruins. From the coast to over 15 km inland, salt water saturated the soil as a result of the 7m storm surge pushed ashore by the force of the hurricane. The right image was acquired on September 28; the left image was acquired August 15, 2006. Vegetation is displayed in red, and inundated areas are in blue-green. Within the inundated area are several small 'red islands' of high ground where salt domes raised the level of the land, and protected the vegetation.

    With its 14 spectral bands from the visible to the thermal infrared wavelength region, and its high spatial resolution of 15 to 90 meters (about 50 to 300 feet), ASTER images Earth to map and monitor the changing surface of our planet.

    ASTER is one of five Earth-observing instruments launched December 18, 1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products.

    The broad spectral coverage and high spectral resolution of ASTER provides scientists in numerous disciplines with critical information for surface mapping, and monitoring of dynamic conditions and temporal change. Example applications are: monitoring glacial advances and retreats; monitoring potentially active volcanoes; identifying crop stress; determining cloud morphology and physical properties; wetlands evaluation; thermal pollution monitoring; coral reef degradation; surface temperature mapping of soils and geology; and measuring surface heat balance.

    The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

    Size: 37 by 49.5 kilometers (22.8 by 30.6 miles) Location: 29.8 degrees North latitude, 94.4 degrees West longitude Orientation: North at top Image Data: ASTER Bands 3, 2, and 1 Original Data Resolution: 15 meters (49.2 feet) Date Acquired: September 28, 2008

  20. Gulf Coast, Shaded Relief and Colored Height

    NASA Technical Reports Server (NTRS)

    2004-01-01

    [figure removed for brevity, see original site] [figure removed for brevity, see original site] Figure 1Figure 2

    The topography of the Gulf Coast states is well shown in this color-coded shaded relief map generated with data from the Shuttle Radar Topography Mission. The image on the top (see Figure 1) is a standard view showing southern Louisiana, Mississippi, Alabama and the panhandle of Florida. Green colors indicate low elevations, rising through yellow and tan, to white at the highest elevations.

    For the view on the bottom (see Figure 2), elevations below 10 meters (33 feet) above sea level have been colored light blue. These low coastal elevations are especially vulnerable to flooding associated with storm surges. Planners can use data like these to predict which areas are in the most danger and help develop mitigation plans in the event of particular flood events.

    Elevation data used in this image were acquired by the Shuttle Radar Topography Mission aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Geospatial-Intelligence Agency (NGA) of the U.S. Department of Defense and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Science Mission Directorate, Washington, D.C.

    Location: 31 degrees north latitude, 88 degrees west longitude Orientation: North toward the top, Mercator projection Size: 702 by 433 kilometers (435 by 268 miles) Image Data: shaded and colored SRTM elevation model Date Acquired: February 2000

  1. United States Coast Guard portable salvage computer. Final report

    SciTech Connect

    Allen, S.J.

    1986-07-01

    The US Coast Guard's interest in marine salvage arises from its responsibility under the Federal Water Pollution Control Act and other laws dealing with oil spills. At vessel stranding situations, which could result in significant environmental damage through the release of oil or hazardous chemicals, the Coast Guard is represented by an On-Scene Coordinator (OSC), who must evaluate whether or not appropriate salvage techniques are applied to the stranded vessel by commercial salvors. To assist the OSC, who may not be trained in marine salvage, and other Coast Guard personnel assigned to such salvage operations, a portable salvage computer has been programmed to accomplish salvage calculations in a user-friendly manner. In this final report, the development of the salvage program and selection of a portable computer are described along with results of field testing with actual stranding situations.

  2. Effects of sea level rise on rugged coasts

    SciTech Connect

    Belknap, D.F. (Univ. of Maine, Orono (USA))

    1990-05-01

    Rugged coasts are usually rock framed, with more or less discontinuous unconsolidated sediment supply. Evolution of rugged coasts with respect to rising sea level is locally variable, involving rapid changes in facies over short distances and times. Glaciated and tectonic coasts are common examples. Three aspects of coastal evolution dominate rugged coasts during rising sea level: (1) drowning of resistant rocky shores, (2) bluff erosion in sediments or cliff erosion in less resistant rocks, involving marine abrasion as well as terrestrial processes and control by rock structures, and (3) larger scale structural control creating indentations and salients. The third aspect results in embayed coasts that may evolve as estuarine, fjord, or barrier-backbarrier systems. Of overriding concern for stratigraphic interpretation are paleogeography and sediment sources. The Maine coast and nearshore are classic examples of drowned shoreline, and record the effects of glaciation and rapid relative sea level changes over the past 14,000 yr. Offshore at {minus}60 m is a lowstand shoreline (approximately 10,000 yr B.P.), which ranges from cliff to barrier split( ). The inner shelf has evolved through drowning of shelf valleys and peninsulas, bluff erosion and formation of local transgressive barrier-backbarrier systems. Often short-term steady state equilibrium is established until a threshold is reached followed by rapid reorganization at a new location. This occurs in barrier systems, by overtopping of sills in estuaries, and in variable bluff and cliff erosion sites. Preservation potential is high only in valley axes and at sea level stillstand positions.

  3. AMERICAN PARTICIPATION IN TUNA FISHERY OF EASTERN TROPICAL ATLANTIC

    E-print Network

    , the fishery consists of baitboats and purse seiners of Canada, France, Ivory Coast, Table 1. Catch (metricCh of yellowfin tuna for French -Ivory Coast -Senegalese (FIS) and Am rI an v ssels . D ta for FrS vessels

  4. Factors controlling beach changes of a Texas gulf coast beach 

    E-print Network

    Seelig, William Newton

    1973-01-01

    FACTORS CONTROLLING BEACH CHANGES OF A TEXAS GULF COAST BEACH A Thesis by WILLIAM NEWTON SEEL IG Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1973 Najor Subject: Civil Engineering FACTORS CONTROLLING BEACH CHANGES OF A TEXAS GULF COAST BEACH A Thesis by WILLIAM NEWTON SEELIG Approved as to sty1e and content by: A~ . E. c) er, Jr, (Co-chairman) R. M. Soren en (Co-cha) rman) E...

  5. Factors controlling beach changes of a Texas gulf coast beach

    E-print Network

    Seelig, William Newton

    1973-01-01

    December 1973 Najor Subject: Civil Engineering FACTORS CONTROLLING BEACH CHANGES OF A TEXAS GULF COAST BEACH A Thesis by WILLIAM NEWTON SEELIG Approved as to sty1e and content by: A~ . E. c) er, Jr, (Co-chairman) R. M. Soren en (Co-cha) rman) E.... L. Kist er (Member) W. M. r (Member) . D. Turpin ead of Departm t} December 1973 43a414 ABSTRACT Factors Controlling Beach Changes of A Texas Gulf Coast Beach. (December 1973) William Newton Seelig, B. S. , Virginia Polytechnic Institute...

  6. 76 FR 28795 - Privacy Act of 1974; Department of Homeland Security United States Coast Guard-024 Auxiliary...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-18

    ...Security United States Coast Guard-024 Auxiliary Database System of Records AGENCY: Privacy...Security/United States Coast Guard-024 Auxiliary Database (AUXDATA) System of Records...element, the United States Coast Guard Auxiliary. As a result of the biennial...

  7. 76 FR 49500 - Privacy Act of 1974; Department of Homeland Security United States Coast Guard-020 Substance...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-10

    ...United States Coast Guard--020 Substance Abuse Prevention and Treatment Program...United States Coast Guard--020 Substance Abuse Prevention and Treatment Program...United States Coast Guard's Substance Abuse Prevention and Treatment...

  8. 76 FR 39245 - Privacy Act of 1974: Implementation of Exemptions; Department of Homeland Security/U.S. Coast...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-06

    ...Coast Guard--008 Courts Martial Case Files System of Records; Correction AGENCY...Coast Guard--008 Courts Martial Case Files System of Records'' from certain provisions...Coast Guard -008 Courts Martial Case Files System of Records'' from certain...

  9. 40 CFR 408.180 - Applicability; description of the West Coast hand-butchered salmon processing subcategory.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...description of the West Coast hand-butchered salmon processing subcategory. 408.180...CATEGORY West Coast Hand-Butchered Salmon Processing Subcategory § 408.180...description of the West Coast hand-butchered salmon processing subcategory. The...

  10. 40 CFR 408.180 - Applicability; description of the West Coast hand-butchered salmon processing subcategory.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...description of the West Coast hand-butchered salmon processing subcategory. 408.180...CATEGORY West Coast Hand-Butchered Salmon Processing Subcategory § 408.180...description of the West Coast hand-butchered salmon processing subcategory. The...

  11. 40 CFR 408.180 - Applicability; description of the West Coast hand-butchered salmon processing subcategory.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...description of the West Coast hand-butchered salmon processing subcategory. 408.180...CATEGORY West Coast Hand-Butchered Salmon Processing Subcategory § 408.180...description of the West Coast hand-butchered salmon processing subcategory. The...

  12. 40 CFR 408.180 - Applicability; description of the West Coast hand-butchered salmon processing subcategory.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...description of the West Coast hand-butchered salmon processing subcategory. 408.180...CATEGORY West Coast Hand-Butchered Salmon Processing Subcategory § 408.180...description of the West Coast hand-butchered salmon processing subcategory. The...

  13. 40 CFR 408.180 - Applicability; description of the West Coast hand-butchered salmon processing subcategory.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...description of the West Coast hand-butchered salmon processing subcategory. 408.180...CATEGORY West Coast Hand-Butchered Salmon Processing Subcategory § 408.180...description of the West Coast hand-butchered salmon processing subcategory. The...

  14. 30 CFR 254.50 - Spill response plans for facilities located in State waters seaward of the coast line.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...for facilities located in State waters seaward of the coast line...Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND...Facilities Located in State Waters Seaward of the Coast Line ...facilities located in State waters seaward of the coast...

  15. 33 CFR 187.313 - Must a State honor a prior State title, Coast Guard documentation, and foreign registry?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...State honor a prior State title, Coast Guard documentation, and foreign registry...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...State honor a prior State title, Coast Guard documentation, and foreign...

  16. 33 CFR 96.450 - What happens if the Coast Guard disapproves an organization's request to be authorized?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false What happens if the Coast Guard disapproves an organization's...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...96.450 What happens if the Coast Guard disapproves an...

  17. 33 CFR 165.776 - Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Security Zone; Coast Guard Base San Juan, San Juan Harbor...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...Limited Access Areas Seventh Coast Guard District § 165.776...

  18. 33 CFR 20.1309 - Admissibility of respondents' criminal records and records with the Coast Guard before entry of...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...criminal records and records with the Coast Guard before entry of findings and conclusions...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY...ADMINISTRATIVE PROCEEDINGS OF THE COAST GUARD Supplementary Evidentiary...

  19. 76 FR 12982 - Policy for Guidelines for Coast Guard Evaluations of Compliance With the U.S. Environmental...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-09

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard [Docket No. USCG-2011-0104] Policy for Guidelines for Coast Guard Evaluations of Compliance With...Normal Operation of Vessels AGENCY: Coast Guard, DHS. ACTION: Notice of...

  20. 75 FR 64670 - Safety Zones; Temporary Change of Date for Recurring Fireworks Display Within the Fifth Coast...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-20

    ...DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2010-0927...Fireworks Display Within the Fifth Coast Guard District, Wrightsville Beach, NC AGENCY: Coast Guard, DHS. ACTION: Temporary...