WorldWideScience

Sample records for arroyo mocho boulder

  1. Arroyo Mocho Boulder Removal Project: Lawrence Livermore National Laboratory Hetch Hetchy Pump Station

    Energy Technology Data Exchange (ETDEWEB)

    Burkholder, L; Kato, T; Van Hattem, M

    2007-06-28

    The purpose of this biological assessment is to review the proposed Arroyo Mocho Boulder Removal Project in sufficient detail to determine to what extent the proposed action may affect any of the threatened, endangered, proposed, or sensitive species and designated or proposed critical habitats listed below. In addition, the following information is provided to comply with statutory requirements to use the best scientific and commercial information available when assessing the risks posed to listed and/or proposed species and designated and/or proposed critical habitat by proposed federal actions. This biological assessment is prepared in accordance with legal requirements set forth under regulations implementing Section 7 of the Endangered Species Act (50 CFR 402; 16 U.S.C 1536 (c)). It is our desire for the Arroyo Mocho Boulder Removal Project to receive incidental take coverage for listed species and critical habitat within the greater project area by means of amending the previous formal Section 7 consultation (1-1-04-F-0086) conducted a few hundred meters downstream by Lawrence Livermore National Laboratory (LLNL) in 2002. All conservation measures, terms and conditions, and reporting requirements from the previous Biological Opinion (1-1-04-F-0086) have been adopted for this Biological Assessment and/or amendment.

  2. Topics in Mocho' Phonology and Morphology

    Science.gov (United States)

    Palosaari, Naomi Elizabeth

    2011-01-01

    This dissertation is a grammatical description of several features of the morphology and phonology of the Mocho' language. Mocho' (Motozintleco) is a moribund Mayan language spoken in the Chiapas region of Mexico near the border of Guatemala. This dissertation, based on data collected during several field trips and supplemented with unpublished…

  3. EXPLOITATION OF GRANITE BOULDER

    Directory of Open Access Journals (Sweden)

    Ivan Cotman

    1994-12-01

    Full Text Available The processes of forming, petrography, features, properties and exploitation of granite boulders are described. The directional drilling and black powder blasting is the succesful method in exploitation of granite boulders (boulder technology (the paper is published in Croatian.

  4. Moses/Musaeus/Mochos and his God Yahweh, Iao, and Sabaoth, seen from a Graeco-Roman perspective

    NARCIS (Netherlands)

    van Kooten, G.H.; Kooten, G.H. van

    2006-01-01

    George H. van Kooten, “Moses/Musaeus/Mochos and His God Yahweh, Iao, and Sabaoth, Seen from a Graeco-Roman Perspective,” in The Revelation of the Name YHWH to Moses: Perspectives from Judaism, the Pagan Graeco-Roman World, and Early Christianity (ed. George H. van Kooten; Themes in Biblical Narrativ

  5. Boulder Magnetic Observatory

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — These data are vector and scalar component values of the Earth's magnetic field for 2004 recorded at the Boulder Magnetic Observatory in Colorado. Vector values are...

  6. critical habitat designated for the arroyo toad

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — These data identify the areas (in general) of critical habitat designated for the arroyo toad. NOTE: THIS DATA SET INCLUDES APPROXIMATELY 900 ACRES OF LAND...

  7. Probability of Boulders

    DEFF Research Database (Denmark)

    Ditlevsen, Ove Dalager

    1997-01-01

    To collect background information for formulating a description of the expected soil properties along the tunnel line, in 1987 Storebælt initiated a statistical investigation of the occurrence and size of boulders in the Great Belt area. The data for the boulder size distribution were obtained by...... data collection part of the investigation was made on the basis of geological expert advice (Gunnar Larsen, Århus) by the Danish Geotechnical Institute (DGI).The statistical data analysis combined with stochastic modeling based on geometry and sound wave diffraction theory gave a point estimate and a...

  8. de la cuenca del arroyo Guachinango

    Directory of Open Access Journals (Sweden)

    Geisy Hernández C.

    2007-01-01

    Full Text Available Se realizó el estudio del arroyo Guachinango, afluente del río Luyanó, en el tramo acotado desde el nacimiento del mismo hasta el puente de hierro peatonal ubicado en las afueras del reparto Dolores (Dolores y Final, municipio San Miguel del Padrón. Se valoró la posible utilización de las aguas del arroyo con fines de regadío, para lo cual se ejecutó el estudio hidrológico y levantamiento de las fuentes contaminantes. El estudio hidrológico arrojó que la cuenca donde se trabajó tiene una extensión de 424,57 ha (4,25 km2 de estas 276,36 ha pueden emplearse en la agricultura. El levantamiento mostró que la mayor carga contaminante procede de los residuales domésticos, al ser estos los que mayor volumen vierten al arroyo. El 50 % del área agrícola de la cuenca puede ser regada con las aguas del arroyo siempre que se le de a las mismas el tratamiento que requieran en cada caso

  9. Reprodutibilidade de medidas antropométricas estáticas de graduandos de odontologia e de mochos odontológicos

    OpenAIRE

    PINELLI Camila; Soares, Débora Dramis; Quirino, Lilian Caldas; Campos, Juliana Alvares Duarte Bonini; Garcia, Patrícia Petromilli Nordi Sasso

    2011-01-01

    Objetivo: Avaliar a reprodutibilidade intra-examinador de medidas antropométricas estáticas de graduandos do curso de Odontologia, bem como características e medidas de regulagem de mochos odontológicos por eles utilizados. Método: Foram avaliados 40 voluntários e 6 tipos de mochos. Para tomada das medidas antropométicas, os equipamentos utilizados foram cadeira de escritório adaptada, trena flexível com duas hastes adaptadas, dispositivo metálico com ângulo central de 90º, barbante, pranc...

  10. Las mujeres y sus representaciones de la lectura y la escritura en la revista Fray Mocho (1912-1918

    Directory of Open Access Journals (Sweden)

    Alejandro E. Parada

    2011-07-01

    Full Text Available El presente trabajo analiza el universo de las mujeres y sus representaciones de la lectura y la escritura en un magazine paradigmático de comienzos del siglo XX en la Argentina: Fray Mocho. En el artículo se presentan, entre otros tópicos, los tipos de lectura femeninos, las propagandas discursivas, la actitud masculina ante la participación de la mujer en la civilización impresa de la época y el horizonte textual en la esfera doméstica y social. Se señala, finalmente, la gestación creciente de una variedad de usos y prácticas de las mujeres para acceder al mundo tipográfico.The present work analyses women's universe and the representations of women's reading and writing in Fray Mocho, a prototypical magazine of early twentieth century in Argentina. Among other topics, types of women's readings, advertising discourse, men's attitudes towards women's participation in the print culture of the time, textual horizon in the social and domestic spheres are presented in the article. Finally, the growing appearance and development of a variety of women's uses and practices to gain access to the print world is discussed.

  11. Chemistry of the Arroyo Marincho complex and Granodiorita of the Arroyo Grande. Part II. (Uruguay)

    International Nuclear Information System (INIS)

    Mineralogical and chemical studies as well as thermodynamic conditions evaluation are able to localize several stabilized curves of the ferromagnese minerals in the Marincho complex ands the Arroyo Grande. The geochemical and thermodynamic characteristics has allowed to drive different evolutive models.

  12. 76 FR 8359 - Boulder Canyon Project

    Science.gov (United States)

    2011-02-14

    ... kilowattmonth (kWmonth), and the proposed composite rate is 22.16 mills/kWh. \\1\\ 75 FR 57912. \\2\\ 133 FERC ] 62... Area Power Administration Boulder Canyon Project AGENCY: Western Area Power Administration, DOE...) is proposing an adjustment to the Boulder Canyon Project (BCP) electric service base charge and...

  13. Corrective measures evaluation report for Tijeras Arroyo groundwater.

    Energy Technology Data Exchange (ETDEWEB)

    Witt, Johnathan L (North Wind, Inc., Idaho Falls, ID); Orr, Brennon R. (North Wind, Inc., Idaho Falls, ID); Dettmers, Dana L. (North Wind, Inc., Idaho Falls, ID); Hall, Kevin A. (North Wind, Inc., Idaho Falls, ID); Howard, M. Hope (North Wind, Inc., Idaho Falls, ID)

    2005-08-01

    This Corrective Measures Evaluation report was prepared as directed by a Compliance Order on Consent issued by the New Mexico Environment Department to document the process of selecting the preferred remedial alternative for Tijeras Arroyo Groundwater. Supporting information includes background concerning the site conditions and potential receptors and an overview of work performed during the Corrective Measures Evaluation. The evaluation of remedial alternatives included identifying and describing four remedial alternatives, an overview of the evaluation criteria and approach, comparing remedial alternatives to the criteria, and selecting the preferred remedial alternative. As a result of the Corrective Measures Evaluation, monitored natural attenuation of the contaminants of concern (trichloroethene and nitrate) is the preferred remedial alternative for implementation as the corrective measure for Tijeras Arroyo Groundwater. Design criteria to meet cleanup goals and objectives and the corrective measures implementation schedule for the preferred remedial alternative are also presented.

  14. Do Cement Boulders Mimic Natural Boulders for Macro-Invertebrates in the Southern Caspian Sea?

    OpenAIRE

    Pourjomeh, Fatemeh; Shokri, Mohammad Reza; Kiabi, Bahram

    2014-01-01

    The macro-invertebrates on natural (rock) and artificial (cement) boulders were compared along the southern Caspian Sea and the effect of structural features of boulders (i.e. orientation, facing, surface complexity, the degree of exposure to the wave action) on macro-invertebrate communities were investigated. Ten locations with rock walls in the southern Caspian Sea were investigated in which the isolated boulders of natural and artificial types with similar dimensions were haphazardly ...

  15. Infiltration and quality of water for two arroyo channels, Albuquerque, New Mexico, 1988-92

    Science.gov (United States)

    Thomas, Carole L.

    1995-01-01

    Selected reaches of Grant Line Arroyo and Tijeras Arroyo in Albuquerque, New Mexico, were studied to collect information about the amount and quality of infiltration through arroyo channels. Infiltration rate was calculated for selected reaches of Grant Line Arroyo and Tijeras Arroyo based on instantaneous streamflow-loss volumes, wetted channel area, and instantaneous evaporation rates measured during 1988-92. Infiltration rates at Grant Line Arroyo ranged from 0.0 to 0.6 foot per day, and at Tijeras Arroyo from 2.28 to 30 feet per day. The evaporation rate ranged from one-tenth of 1 percent to 2 percent of the infiltration rate. Infiltration rates differed with the location of the reach isolated for measurement and with the time of day of the infiltration-rate measurement. Differences in intrinsic permeability of the sediments may be the most important factor affecting spatial variations in infiltration. The most important factor affecting temporal variations in infiltration may be the temperature of the water and sediment where infiltration occurs. Annual evaporation rates were greatest over saturated stream sediments and ranged from 802 to 1,025 millimeters per year or from 31.57 to 40.35 inches per year. Annual evaporation rates were least over unsaturated, unvegetated soil and ranged from 174 to 291 millimeters per year or from 6.85 to 11.46 inches per year. Annual evapotranspiration rates over grasses or shrubs or both were about one-half the rates over saturated stream sediments. Rates were similar for Grant Line and Tijeras Arroyos. The land- surface vegetation, availability of water at the land surface, availability of energy to enable a change of state from water to vapor, existence of a vapor concentration gradient, and a turbulent atmosphere to carry the vapor away may be the factors that determine the amount of evaporation and evapotranspiration. Water in Grant Line Arroyo and Tijeras Arroyo met U. S. Environmental Protection Agency drinking

  16. 78 FR 7775 - Boulder Canyon Project

    Science.gov (United States)

    2013-02-04

    .... \\1\\ 75 FR 57912 (September 23, 2010). \\2\\ 133 FERC ] 62,229. The proposed BCP electric service base... in power rate adjustments (10 CFR part 903) were published on September 18, 1985 (50 FR 87835... Area Power Administration Boulder Canyon Project AGENCY: Western Area Power Administration, DOE....

  17. 77 FR 2533 - Boulder Canyon Project

    Science.gov (United States)

    2012-01-18

    ... composite rate is 20.45 mills/kWh. \\1\\ 75 FR 57912 (Sept. 23, 2010). \\2\\ 133 FERC ] 62,229. The proposed BCP... 18, 1985 (50 FR 87835). Availability of Information All brochures, studies, comments, letters... Area Power Administration Boulder Canyon Project AGENCY: Western Area Power Administration, DOE....

  18. Monitoring of the land and geological environment condition in the Eupatorijska arroyo in Dnipropetrovsk

    Directory of Open Access Journals (Sweden)

    Bogachenko L.D.

    2015-09-01

    Full Text Available The article analyzes the condition of the land and the geological environment in the Eupatorijska arroyo, engineering-geological estimation of the territory of the arroyo is carried out, negative engineering-geological processes and phenomena are defined. It was found that due to the negative technogenic impact in conjunction with natural and climatic factors, the slopes under study can be considered as those under the risk of landslides and therefore are in need of engineering protection.

  19. Cardiovascular Surgery Residency Program: Training Coronary Anastomosis Using the Arroyo Simulator and UNIFESP Models

    OpenAIRE

    Miguel Angel Maluf; Walter José Gomes; Ademir Massarico Bras; Thiago Cavalcante Vila Nova de Araújo; André Lupp Mota; Caio Cesar Cardoso; Rafael Viana dos S. Coutinho

    2015-01-01

    ABSTRACT OBJECTIVE: Engage the UNIFESP Cardiovascular Surgery residents in coronary anastomosis, assess their skills and certify results, using the Arroyo Anastomosis Simulator and UNIFESP surgical models. METHODS: First to 6th year residents attended a weekly program of technical training in coronary anastomosis, using 4 simulation models: 1. Arroyo simulator; 2. Dummy with a plastic heart; 3. Dummy with a bovine heart; and 4. Dummy with a beating pig heart. The assessment test was compr...

  20. Corrective measures evaluation work plan : Tijeras Arroyo Groundwater : revision 0.

    Energy Technology Data Exchange (ETDEWEB)

    Wymore, Ryan A.; Collins, Sue S.; Skelly, Michael Francis; Koelsch, Michael C.

    2004-12-01

    This document, which is prepared as directed by the Compliance Order on Consent (COOC) issued by the New Mexico Environment Department, outlines a process to evaluate remedial alternatives to identify a corrective measure for the Sandia National Laboratories Tijeras Arroyo Groundwater (TAG). The COOC provides guidance for implementation of a Corrective Measures Evaluation (CME) for TAG. This Work Plan documents an initial screening of remedial technologies and presents a list of possible remedial alternatives for those technologies that passed the screening. This Work Plan outlines the methods for evaluating these remedial alternatives and describes possible site-specific evaluation activities necessary to estimate remedy effectiveness and cost. These methods will be reported in the CME Report. This Work Plan outlines the CME Report, including key components and a description of the corrective measures process.

  1. Relocalising disaster risk reduction in Boulder, Colorado

    OpenAIRE

    Kelman, I.; Karnes, E.

    2007-01-01

    Relocalisation aims to return communities to a more local basis from their current, relatively centralised and transport-dependent systems, in sectors such as food, energy, and manufacturing. Disaster risk reduction can also be relocalised, in line with practices which involve local residents in disaster-related activities, pre-disaster such as mitigation and prevention and post-disaster such as response and recovery, rather than relying on post-event external assistance. Boulder Valley, Colo...

  2. The distribution and source of boulders on asteroid 4179 Toutatis

    Science.gov (United States)

    Jiang, Yun; Ji, Jianghui; Huang, Jiangchuan; Marchi, Simone; Li, Yuan; Ip, Wing-Huen

    2016-01-01

    Boulders are ubiquitous on the surfaces of asteroids and their spatial and size distributions provide information for the geological evolution and collisional history of parent bodies. We identify more than 200 boulders on near-Earth asteroid 4179 Toutatis based on images obtained by Chang'e-2 flyby. The cumulative boulder size frequency distribution (SFD) gives a power-index of -4.4 +/- 0.1, which is clearly steeper than those of boulders on Itokawa and Eros, indicating much high degree of fragmentation. Correlation analyses with craters suggest that most boulders cannot solely be produced as products of cratering, but are probably survived fragments from the parent body of Toutatis, accreted after its breakup. Similar to Itokawa, Toutatis probably has a rubble-pile structure, but owns a different preservation state of boulders.

  3. DOE Zero Energy Ready Home Case Study: Boulder ZED Design Build - Boulder, Colorado

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2014-11-01

    This case study describes a DOE Zero Energy Ready Home in Boulder, Colorado, that scored HERS 38 without PV and 0 with PV. This 2,504 ft2 custom home has advanced framed walls, superior insulation a ground-source heat pump, ERV, and triple-pane windows.

  4. Boulder Creek Critical Zone Observatory Data Management Plan

    OpenAIRE

    Fey, Jeri; Anderson, Suzanne

    2016-01-01

    This Data Management Plan (DMP) was created using the DMPTool. It describes all data collected as part of the the Boulder Creek Critical Zone Observatory (CZO) project, which focuses on research in the Boulder Creek watershed. The project is hosted at the Institute or Arctic and Alpine Research (INSTAAR), University of Colorado at Boulder, USA.The goal for the Boulder Creek CZO is to create and collect meaningful and interesting research of the Earth’s critical zone by making this diverse dat...

  5. Wake patterns behind boulders in the rings of Saturn

    International Nuclear Information System (INIS)

    The flow of charged dust around an electrically charged boulder moving through an environment thought to be typical of planatery rings is studied. As the boulder moves through the ring dust it will excite a V-shaped Mach cone pattern of a form and complexity which varies significantly with boulder size, relative velocity between the boulder and the dust, and with dust plasma conditions. Parameters relevant to the Saturnian ring system are used to compute examples which demonstrate the change in Mach cone patterns with the relevant parameters. Shortcomings of the model are discussed and ways to improve the calculations of Mach cone patterns are pointed out

  6. Local late Amazonian boulder breakdown and denudation rate on Mars

    NARCIS (Netherlands)

    de Haas, T.; Hauber, E.; Kleinhans, M.G.

    2013-01-01

    Inactive fan surfaces become smoother and develop desert pavement over time by weathering and erosion. We use this mechanism to estimate late Amazonian boulder breakdown and surface denudation rates on a young (∼1.25 Ma) (Schon et al., 2009) fan on Mars. This is done by comparing boulder size and su

  7. Evaluation of Arroyo Channel Restoration Efforts using Hydrological Modeling: Rancho San Bernardino, Sonora, MX

    Science.gov (United States)

    Jemison, N. E.; DeLong, S.; Henderson, W. M.; Adams, J.

    2012-12-01

    In the drylands of the southwestern U.S. and northwestern Mexico, historical river channel incision (arroyo cutting) has led to the destruction of riparian ecological systems and cieñega wetlands in many locations. Along Silver Creek on the Arizona-Sonora border, the Cuenca Los Ojos Foundation has been installing rock gabions and concrete and earthen berms with a goal of slowing flash floods, raising groundwater levels, and refilling arroyo channels with sediment in an area that changed from a broad, perennially wet cieñega to a narrow sand- and gravel-dominated arroyo channel with an average depth of ~6 m. The engineering efforts hope to restore desert wetlands, regrow riparian vegetation, and promote sediment deposition along the arroyo floor. Hydrological modeling allows us to predict how rare flood events interact with the restoration efforts and may guide future approaches to dryland ecological restoration. This modeling is complemented by detailed topographic surveying and use of streamflow sensors to monitor hydrological processes in the restoration project. We evaluate the inundation associated with model 10-, 50-, 100-, 500-, and 1,000-year floods through the study area using FLO-2D and HEC-RAS modeling environments in order to evaluate the possibility of returning surface inundation to the former cieñega surface. According to HEC-RAS model predictions, given current channel configuration, it would require a 500-year flood to overtop the channel banks and reinundate the cieñega (now terrace) surface, though the 100-year flood may lead to limited terrace surface inundation. Based on our models, 10-year floods were ~2 m from overtopping the arroyo walls, 50-year floods came ~1.5 m from overtopping the arroyos, 100-year floods were ~1.2 m from overtopping, and 500- and 1,000-year floods at least partially inundated the cieñega surface. The current topography of Silver Creek does not allow for frequent flooding of the former cieñega; model predictions

  8. Small asteroids - rubble piles or boulders?

    Science.gov (United States)

    Harris, Alan W.

    2013-10-01

    modeling of asteroid rotations and size-frequency distributions to consider a strength model with a fairly abrupt transition from rubble pile to boulder rather than slowly varying or constant strength.

  9. Boulder Dislodgement by Tsunamis and Storms: Version 2.0

    Science.gov (United States)

    Weiss, Robert

    2016-04-01

    In the past, boulder dislodgement by tsunami and storm waves has been approached with a simple threshold approach in which a boulder was moved if the sum of the acting forces on the boulder is larger than zero. The impulse theory taught us, however, that this criterion is not enough to explain particle dislodgement. We employ an adapted version of the Newton's Second Law of Motion (NSLM) in order to consider the essence of the impulse theory which is that the sum of the forces has to exceed a certain threshold for a certain period of time. Furthermore, a classical assumption is to consider linear waves. However, when waves travel toward the shore, they alter due to non-linear processes. We employ the TRIADS model to quantify that change and how it impacts boulder dislodgement. We present our results of the coupled model (adapted NSLM and TRIADS model). The results project a more complex picture of boulder transport by storms and tsunami. The following question arises: What information do we actually invert, and what does it tell us about the causative event?

  10. Small-Scale Spatial Variability of Ozone in Boulder, Colorado

    Science.gov (United States)

    Deanes, L. N.; Sadighi, K.; Casey, J. G.; Collier, A. M.; Hannigan, M.

    2015-12-01

    Surface ozone (O3) can pose several health risks to humans, such as an increased number of and intensity of asthma attacks. Considering this, it is important that ozone levels are monitored. While municipal air quality monitors are present in cities like Boulder, Colorado, these monitors often only consider regional analysis, neglecting the variability of compounds, such as ozone or carbon monoxide, over smaller distances. Small-scale (approximately 1 kilometer) spatial variability in ozone is important because humans experience these small scales on a daily basis. Using low-cost, next-generation air quality monitors ("pods") developed at the University of Colorado-Boulder, we assessed small-scale spatial variability of surface ozone in Boulder, Colorado. This was done by placing clusters of 4-5 pods within approximately 1 kilometer of each other at specific sites in the city of Boulder. We collected data at two sites: one on the University of Colorado-Boulder campus (i.e., an urban site) and one outside of the city (i.e., a rural site). Pods were left in their positions for one to two weeks allowing for observation of ozone trends. As expected the typical diurnal trend was observed; however, further analysis revealed differences between these daily trends. Data collected by the pods allows for better understanding of small-scale spatial variability of surface ozone and how this may be driven by nearby sources.

  11. Streamflow, Infiltration, and Ground-Water Recharge at Abo Arroyo, New Mexico

    Science.gov (United States)

    Stewart-Deaker, Amy E.; Stonestrom, David A.; Moore, Stephanie J.

    2007-01-01

    Abo Arroyo, an ephemeral tributary to the Rio Grande, rises in the largest upland catchment on the eastern side of the Middle Rio Grande Basin (MRGB). The 30-kilometer reach of channel between the mountain front and its confluence with the Rio Grande is incised into basin-fill sediments and separated from the regional water table by an unsaturated zone that reaches 120 meters thick. The MRGB portion of the arroyo is dry except for brief flows generated by runoff from the upland catchment. Though brief, ephemeral flows provide a substantial fraction of ground-water recharge in the southeastern portion of the MRGB. Previous estimates of average annual recharge from Abo Arroyo range from 1.3 to 21 million cubic meters. The current study examined the timing, location, and amount of channel infiltration using streamflow data and environmental tracers during a four-year period (water years 1997?2000). A streamflow-gaging station (?gage?) was installed in a bedrock-controlled reach near the catchment outlet to provide high-frequency data on runoff entering the basin. Streamflow at the gage, an approximate bound on potential tributary recharge to the basin, ranged from 0.8 to 15 million cubic meters per year. Storm-generated runoff produced about 98 percent of the flow in the wettest year and 80 percent of the flow in the driest year. Nearly all flows that enter the MRGB arise from monsoonal storms in July through October. A newly developed streambed temperature method indicated the presence and duration of ephemeral flows downstream of the gage. During the monsoon season, abrupt downward shifts in streambed temperatures and suppressed diurnal ranges provided generally clear indications of flow. Streambed temperatures during winter showed that snowmelt is also effective in generating channel infiltration. Controlled infiltration experiments in dry arroyo sediments indicated that most ephemeral flow is lost to seepage before reaching the Rio Grande. Streambed temperature

  12. Final Report for the Arroyo Las Positas Maintenance Impact Study, Lawrence Livermore National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    van Hattem, M; Paterson, L

    2006-01-12

    In 2000, the Lawrence Livermore National Laboratory's (LLNL) Environmental Protection Department, in coordination with Plant Engineering (PE), began dredging sections of the Arroyo Las Positas (ALP) to alleviate concerns about flooding of sensitive facilities within the mainsite of Lawrence Livermore National Laboratory. In order to reduce potential impacts on the federally threatened California red-legged frog (Rana aurora draytonii), LLNL proposed to dredge sections of the ALP in a ''checkerboard pattern'', resulting in a mosaic of open water habitat and vegetated sections (Figure 1). The Arroyo Las Positas Management Plan (Plan) was coordinated with both state and federal agencies including the U.S. Fish and Wildlife Service (USFWS), California Department of Fish and Game (CDF&G), San Francisco Regional Water Quality Control Board (SFRWQCB), and the Army Corp of Engineers (ACOE). Water Discharge Requirements (WDRs) were issued for this project on December 30, 1999 (Order No. 99-086) by the SFRWQCB. Provision 19 of the WDRs outlined a five-year (2000 through 2004) Maintenance Impact Study (MIS) that LLNL began in coordination with dredging work that was conducted as part of the Arroyo Las Positas Management Plan. Provision 20 of these WDRs requires LLNL to submit a final report of the results of the Maintenance Impact Study for this project to the SFRWQCB. The purpose of this report is to present the results of the Maintenance Impact Study for Arroyo Las Positas and meet the requirements of Provision 20. A description of the annual monitoring included in this Maintenance Impact Study is included in the methods section of this report. Initially the Plan called for dredging the entire length of the Arroyo Las Positas (approximately 6,981 linear feet) over a 5-year period to minimize temporal impacts on the California red-legged frog. Dredging occurred in 2000 ({approx}1,300 ft.), 2001 ({approx}800 ft.), and 2002 ({approx}1,200 ft.), which

  13. Local late Amazonian boulder breakdown and denudation rate on Mars

    Science.gov (United States)

    Haas, Tjalling; Hauber, Ernst; Kleinhans, Maarten G.

    2013-07-01

    Inactive fan surfaces become smoother and develop desert pavement over time by weathering and erosion. We use this mechanism to estimate late Amazonian boulder breakdown and surface denudation rates on a young (˜1.25 Ma) (Schon et al., 2009) fan on Mars. This is done by comparing boulder size and surface relief between lobes of different ages. The boulder breakdown rate is 3.5 m/Myr, surface smoothing (denudation) rate is approximated as 0.89 m/Myr. These rates exceed previous estimates for the Amazonian by orders of magnitude. We attribute this to locality, high initial smoothing rates after morphological activity and obliquity and eccentricity-driven variation in the availability of (metastable) liquid water, which acts as a catalyst for weathering during these periods. The results have major implications for process interpretation of Martian landforms, as they imply that typical small-scale morphology may be subdued within <1 Myr.

  14. Boulder Dislodgment Reloaded: New insights from boulder transport and dislodgement by tsunamis and storms from three-dimensional numerical simulations with GPUSPH

    Science.gov (United States)

    Weiss, R.; Zainali, A.

    2014-12-01

    Boulders can be found on many coastlines around the globe. They are generally thought to be moved either during coastal storms or tsunamis because they are too heavy to be moved by more common marine or coastal processes. To understand storm and tsunami risk at given coastline, the event histories of both events need to be separated to produce a robust event statistics for quantitative risk analyses. Because boulders are most likely only moved by coastal storms or tsunamis, they are very suitable to produce the data basis for such event statistics. Boulder transport problem has been approached by comparing the driving with resisting forces acting on a boulder. However, we argue that this approach is not sufficient because the comparison of resisting and driving forces only constitutes boulder motion, but not for boulder dislodgment. Boulder motion means that the boulder starts to move out of its pocket. However, this motion does not guarantee that the boulder will reach the critical dislodgment position. Boulder dislodgment is a necessary condition to identify whether or not a boulder has moved. For boulder dislodgement, an equation of motion is needed, and that equation is Newtons Second Law of Motion (NSL). We perform fully coupled three-dimensional numerical simulation of boulders moved by waves where the boulders move according to NSL. Our numerical simulations are the first of their kind applied to tsunami and storm boulder motion. They show how storm and tsunami waves interact with boulders in a more realistic physical setting, and highlight the importance of submergence. Based on our simulations we perform a dimensional analysis that identifies the Froude number as important parameter, which can be considered large only in the front of tsunami waves, but small in the rest of tsunami wave and also generally small in storm waves. From a general point of view, our results indicate that the boulder transport problem is more complex than recently considered, and

  15. Erratic boulders in Switzerland, a geological and cultural heritage

    Science.gov (United States)

    Reynard, Emmanuel

    2015-04-01

    Erratic boulders are stones transported over quite long distances by glaciers and that differ from the type of rock upon which they rely. They range from the size of pebbles to large boulders weighing several thousand tons. Erratic boulders are significant geosites (Reynard, 2004) for several reasons. (1) First, they are indicators of former glacier extensions by marking glaciers' path, size and volume. In Switzerland, they allowed mapping the extension of large Alpine glaciers (the Rhine and Rhone glaciers, in particular) and their retreat stages (e.g. the Monthey erratic boulders that mark an important lateglacial stage of the Rhone glacier). Crystalline erratic boulders along the Jura range (limestone mountains) were used to map the altitude reached by the Rhone glacier during the two last glaciations. Precise mapping of crystalline and limestone boulders distribution also enabled mapping local Jura glaciers' recurrences after the Rhone glacier retreat. (2) During the last decades, several erratic boulders were used for cosmogenic nuclide exposure dating, which allowed impressive advances in palaeoclimatic research. (3) Erratic blocks have also an ecological interest by the fact that they "have transported" specific habitats in areas far away from their origin (e.g. acid crystalline rocks and soils in limestone areas such as in the Jura). For all these reasons, several erratic boulders were classified in the inventory of Swiss geosites. Erratic boulders also have a significant cultural value (Lugon et al., 2006). (1) The Glacier Garden in Lucerne was discovered in 1872. It comprises various surfaces of "roches moutonnées", potholes and large erratic blocks that document the presence of the Reuss glacier. Considered as a natural monument it is now one of the most famous touristic attraction of Lucerne and Central Switzerland. (2) The Pierre Bergère stone, situated in Salvan (Mont-Blanc massif, South-western Switzerland), is the place where future Nobel Prize

  16. Endicamientos naturales en las nacientes del Arroyo Lileo (Provincia del Neuquén, Argentina

    Directory of Open Access Journals (Sweden)

    Ivanna M Penna

    2012-09-01

    Full Text Available En este trabajo analizamos tres endicamientos naturales por depositación de movimientos en masa que tuvieron lugar en las nacientes del arroyo Lileo (Cordillera de los Andes, norte neuquino, dos de ellos ocurrieron en los últimos 50 años. El primero ocurrió en el Holoceno, por desprendimiento de 0,14 km³ de volcanitas en la ladera oeste del valle, cerca de las nacientes del arroyo La Tregua. Este bloqueo originó una laguna permanente de 0,44 km². En los años '60, la depositación de una avalancha de detritos originada en la ladera opuesta del valle, frente a la escarpa de la avalancha de rocas, ocluyó la brecha labrada por erosión fluvial en el depósito de avalancha de rocas, generando un segundo cuerpo lacustre de tipo efímero. El último endicamiento, que tuvo lugar entre >1962-< 1985, se produjo por una progradación súbita de un conoide desarrollado en la desembocadura del arroyo La Tregua, debida a un importante aporte de material por un flujo de detritos originado en la misma zona de desprendimiento del caso descrito previamente. La depositación continua de materiales en la zona del conoide ha sepultado los postes del gasoducto Loma de la Lata - Talcahuano, construido en 1998. En función de que la zona de desprendimientos de la ladera este del valle La Tregua presenta evidencias de inestabilidad, consideramos posible que un nuevo movimiento en masa pueda dar lugar a otro endicamiento.

  17. Habitat use and movement of the endangered Arroyo Toad (Anaxyrus californicus) in coastal southern California

    Science.gov (United States)

    Gallegos, Elizabeth; Lyren, Lisa M.; Lovich, Robert E.; Mitrovich, Milan J.; Fisher, Robert N.

    2011-01-01

    Information on the habitat use and movement patterns of Arroyo Toads (Anaxyrus californicus) is limited. The temporal and spatial characteristics of terrestrial habitat use, especially as it relates to upland use in coastal areas of the species' range, are poorly understood. We present analyses of radiotelemetry data from 40 individual adult toads tracked at a single site in coastal southern California from March through November of 2004. We quantify adult Arroyo Toad habitat use and movements and interpret results in the context of their life history. We show concentrated activity by both male and female toads along stream terraces during and after breeding, and, although our fall sample size is low, the continued presence of adult toads in the floodplain through the late fall. Adult toads used open sandy flats with sparse vegetation. Home-range size and movement frequency varied as a function of body mass. Observed spatial patterns of movement and habitat use both during and outside of the breeding period as well as available climatological data suggest that overwintering of toads in floodplain habitats of near-coastal areas of southern California may be more common than previously considered. If adult toads are not migrating out of the floodplain at the close of the breeding season but instead overwinter on stream terraces in near-coastal areas, then current management practices that assume toad absence from floodplain habitats may be leaving adult toads over-wintering on stream terraces vulnerable to human disturbance during a time of year when Arroyo Toad mortality is potentially highest.

  18. Sistemas ambientales de la cuenca superior del arroyo Langueyú (partido de Tandil, Argentina)

    OpenAIRE

    Zulaica, Laura

    2008-01-01

    Estudios previos de zonificación ecológica de la cuenca superior del arroyo Langueyú (partido de Tandil) permitieron diferenciar y caracterizar seis sistemas ecológicos y definir unidades ecosistémicas de menor jerarquía escalar (componentes) en tres de ellos. El uso actual de las tierras del área está generalmente determinado por las potencialidades y restricciones ecológicas de los sistemas identificados. Estos usos diferenciales determinan a su vez distintos impactos en cada uno de los sis...

  19. Alternativas para conocer el comportamiento de la calidad del agua en un tramo del arroyo guachinango

    OpenAIRE

    Jeny Pérez P.; Geisy Hernández C.; Felicita González R.; Teresa López S.

    2008-01-01

    En el mundo actual ha evolucionado la tecnología para tratamiento y reutilización de aguas residuales, pero la obtención y aplicación de las mismas conlleva grandes inversiones, por lo que un país como el nuestro no está al alcance de la misma. Esto conlleva a la búsqueda de alternativas que se ajusten a nuestro presupuesto y nuestras condiciones, siempre que las mismas cumplan con las medidas de protección e higiene que existen para la utilización de estas aguas. En un tramo de arroyo con ve...

  20. Cardiovascular Surgery Residency Program: Training Coronary Anastomosis Using the Arroyo Simulator and UNIFESP Models

    Directory of Open Access Journals (Sweden)

    Miguel Angel Maluf

    2015-10-01

    Full Text Available ABSTRACT OBJECTIVE: Engage the UNIFESP Cardiovascular Surgery residents in coronary anastomosis, assess their skills and certify results, using the Arroyo Anastomosis Simulator and UNIFESP surgical models. METHODS: First to 6th year residents attended a weekly program of technical training in coronary anastomosis, using 4 simulation models: 1. Arroyo simulator; 2. Dummy with a plastic heart; 3. Dummy with a bovine heart; and 4. Dummy with a beating pig heart. The assessment test was comprised of 10 items, using a scale from 1 to 5 points in each of them, creating a global score of 50 points maximum. RESULTS: The technical performance of the candidate showed improvement in all items, especially manual skill and technical progress, critical sense of the work performed, confidence in the procedure and reduction of the time needed to perform the anastomosis after 12 weeks practice. In response to the multiplicity of factors that currently influence the cardiovascular surgeon training, there have been combined efforts to reform the practices of surgical medical training. CONCLUSION: 1 - The four models of simulators offer a considerable contribution to the field of cardiovascular surgery, improving the skill and dexterity of the surgeon in training. 2 - Residents have shown interest in training and cooperate in the development of innovative procedures for surgical medical training in the art.

  1. Asteroid Redirect Robotic Mission: Robotic Boulder Capture Option Overview

    Science.gov (United States)

    Mazanek, Daniel D.; Merrill, Raymond G.; Belbin, Scott P.; Reeves, David M.; Earle, Kevin D.; Naasz, Bo J.; Abell, Paul A.

    2014-01-01

    The National Aeronautics and Space Administration (NASA) is currently studying an option for the Asteroid Redirect Robotic Mission (ARRM) that would capture a multi-ton boulder (typically 2-4 meters in size) from the surface of a large (is approximately 100+ meter) Near-Earth Asteroid (NEA) and return it to cislunar space for subsequent human and robotic exploration. This alternative mission approach, designated the Robotic Boulder Capture Option (Option B), has been investigated to determine the mission feasibility and identify potential differences from the initial ARRM concept of capturing an entire small NEA (4-10 meters in size), which has been designated the Small Asteroid Capture Option (Option A). Compared to the initial ARRM concept, Option B allows for centimeter-level characterization over an entire large NEA, the certainty of target NEA composition type, the ability to select the boulder that is captured, numerous opportunities for mission enhancements to support science objectives, additional experience operating at a low-gravity planetary body including extended surface contact, and the ability to demonstrate future planetary defense strategies on a hazardous-size NEA. Option B can leverage precursor missions and existing Agency capabilities to help ensure mission success by targeting wellcharacterized asteroids and can accommodate uncertain programmatic schedules by tailoring the return mass.

  2. Dinámica litoral de la costa de Tres Arroyos y SanCayetano, Buenos Aires

    Directory of Open Access Journals (Sweden)

    Germán R. Bértola

    2009-06-01

    Full Text Available La erosión costera de laprovincia de Buenos Aires es originada por lo general a causas naturales, aunquealgunas veces obedecen a causas antrópicas. En los partidos de San Cayetano yTres Arroyos los problemas costeros se limitan a las villas balnearias -y susplayas-, en áreas turísticas con desarrollo incipiente. La fijación de médanos(Balneario San Cayetano o la excesiva forestación (Claromecó, Reta y Orensehan provocado grandes acumulaciones de arena sobre viejos acantilados, elbloqueo de algunas desembocaduras de arroyos y la desactivación de rampas dedunas (desde las playas a los topes de los acantilados. A través decaracterizaciones morfológicas y sedimentológicas se ha logrado discriminar lossitios de mayor impacto. Debido a la fijación por pastos naturales, los médanostransversales han tomado diseños parabólicos. Esto no ha impedido que algunossectores como en el Balneario San Cayetano o Dunamar en Claromecó, losproblemas de fijación de dunas persistan. Las playas de Tres Arroyos son lasmás extensas de la región y particularmente las de Claromecó, son las queexperimentaron mayor variabilidad. Los mayores cambios de la línea de ribera seubicaron en las desembocaduras de los arroyos, como en Quequén Salado yClaromecó, y en el tramo entre el arroyo Cristiano Muerto y el Balneario SanCayetano, con variaciones de +6 a -6 m/año. Comparando las granulometríasmuestreadas con 45 años de diferencia, se reconoce que las arenas de ambosmunicipios no han cambiado sustancialmente. Los perfiles permitieron reconocerperíodos erosivos (-3.900 m³ y acumulativos (6.300 m³.

  3. Groundwater vulnerability in the Arroyo Feliciano basin. Entre Rios. Argentina; Vulnerabilidad del agua subterranea en la cuenca del Arroyo Feliciano. Entre Rios. Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Diaz, E. L.; Romero, E. C.; Boschetti, N. G.; Duarte, O. C.

    2009-07-01

    The study area includes the basin of the Feliciano stream (Arroyo Feliciano) which increasing water resources are affected by the agriculturization rise and the change of soil usage. The 8.199,4 km{sup 2} basin is undergoing a sudden change in the soil usage that goes from an extensive cattle production to intensive rice soybean usage. It has an urban population of approximately 11,600 inhabitants and there are a low number of rural settlers. It is unknown if there is pollution produced by agricultural activity. The objective of this paper is to estimate the pollution vulnerability of the aquifers used for supplying water for human consumption to the towns within the basin; irrigation and watered of animals, fundamentally cattle. There are two internationally standard-considered methods that have been used, known as DRASTIC and GOD, in order to establish the capacity of attenuation of pollutants for elimination, delay and dilution, for agrochemical and fertilizers set in the surface. The outcomes of the application of both methodologies indicate that there is high vulnerability to pollution areas which are in the surroundings of the minor riverbeds and the main course of the Feliciano stream, where the depth to the aquifers is minimal. In the rest of the basin the effect that offers the thickness of the silts and clay of the Hernandarias formation, operates protecting the aquifer. (Author) 12 refs.

  4. Untangling boulder dislodgement in storms and tsunamis: Is it possible with simple theories?

    Science.gov (United States)

    Weiss, R.; Diplas, P.

    2015-03-01

    Boulders can move during storms and tsunamis. It is difficult to find a simple method to distinguish boulders moved by tsunami waves from those moved during storms in the field. In this contribution, we explore boulder dislodgement by storm and tsunami waves by solving an adapted version of Newton's Second Law of Motion in polar coordinates and defining a critical position for boulder dislodgement. We find that the boulder dislodgement is not only a function of the causative wave, but also of the roughness in the vicinity of the boulder and the slope angle. We employ the amplitude of storm and tsunami waves to dislodge boulders of given masses to evaluate if boulder dislodgement in storms can be untangled from boulder transport in tsunamis. As the main result of our numerical experiments, we find a significant difference between storm and tsunami waves to dislodge the same boulder for large masses and large roughness values. This allows us to conclude that simple theories are applicable to answer the questions asked in the title, but we argue only if they contain a critical dislodgement condition like the one presented here.

  5. Final Technical Report - Modernization of the Boulder Canyon Hydroelectric Project

    Energy Technology Data Exchange (ETDEWEB)

    Joe Taddeucci, P E

    2013-03-29

    The Boulder Canyon Hydroelectric Project (BCH) was purchased by the City of Boulder, CO (the city) in 2001. Project facilities were originally constructed in 1910 and upgraded in the 1930s and 1940s. By 2009, the two 10 MW turbine/generators had reached or were nearing the end of their useful lives. One generator had grounded out and was beyond repair, reducing plant capacity to 10 MW. The remaining 10 MW unit was expected to fail at any time. When the BCH power plant was originally constructed, a sizeable water supply was available for the sole purpose of hydroelectric power generation. Between 1950 and 2001, that water supply had gradually been converted to municipal water supply by the city. By 2001, the water available for hydroelectric power generation at BCH could not support even one 10 MW unit. Boulder lacked the financial resources to modernize the facilities, and Boulder anticipated that when the single, operational historical unit failed, the project would cease operation. In 2009, the City of Boulder applied for and received a U.S. Department of Energy (DOE) grant for $1.18 million toward a total estimated project cost of $5.155 million to modernize BCH. The federal funding allowed Boulder to move forward with plant modifications that would ensure BCH would continue operation. Federal funding was made available through the American Recovery and Reinvestment Act (ARRA) of 2009. Boulder determined that a single 5 MW turbine/generator would be the most appropriate capacity, given the reduced water supply to the plant. Average annual BCH generation with the old 10 MW unit had been about 8,500 MW-hr, whereas annual generation with a new, efficient turbine could average 11,000 to 12,000 MW-hr. The incremental change in annual generation represents a 30% increase in generation over pre-project conditions. The old turbine/generator was a single nozzle Pelton turbine with a 5-to-1 flow turndown and a maximum turbine/generator efficiency of 82%. The new unit is a

  6. NASA's asteroid redirect mission: Robotic boulder capture option

    Science.gov (United States)

    Abell, P.; Nuth, J.; Mazanek, D.; Merrill, R.; Reeves, D.; Naasz, B.

    2014-07-01

    NASA is examining two options for the Asteroid Redirect Mission (ARM), which will return asteroid material to a Lunar Distant Retrograde Orbit (LDRO) using a robotic solar-electric-propulsion spacecraft, called the Asteroid Redirect Vehicle (ARV). Once the ARV places the asteroid material into the LDRO, a piloted mission will rendezvous and dock with the ARV. After docking, astronauts will conduct two extravehicular activities (EVAs) to inspect and sample the asteroid material before returning to Earth. One option involves capturing an entire small (˜4--10 m diameter) near-Earth asteroid (NEA) inside a large inflatable bag. However, NASA is also examining another option that entails retrieving a boulder (˜1--5 m) via robotic manipulators from the surface of a larger (˜100+ m) pre-characterized NEA. The Robotic Boulder Capture (RBC) option can leverage robotic mission data to help ensure success by targeting previously (or soon to be) well-characterized NEAs. For example, the data from the Japan Aerospace Exploration Agency's (JAXA) Hayabusa mission has been utilized to develop detailed mission designs that assess options and risks associated with proximity and surface operations. Hayabusa's target NEA, Itokawa, has been identified as a valid target and is known to possess hundreds of appropriately sized boulders on its surface. Further robotic characterization of additional NEAs (e.g., Bennu and 1999 JU_3) by NASA's OSIRIS REx and JAXA's Hayabusa 2 missions is planned to begin in 2018. This ARM option reduces mission risk and provides increased benefits for science, human exploration, resource utilization, and planetary defense.

  7. Flujo de barro del arroyo del Comedero, Jujuy: caracterización, causas y efectos

    Directory of Open Access Journals (Sweden)

    Maria A González

    2012-09-01

    Full Text Available El 12 de Enero de 2010 un flujo de barro afectó un predio de esparcimiento con piletas de aguas termales en la localidad de Termas de Reyes, provincia de Jujuy. Este evento dejó 87 heridos y produjo grandes daños materiales. Las lluvias fueron las desencadenantes del movimiento del material a través de la quebrada del arroyo del Comedero. El depósito del flujo estuvo constituido por casi el 70% de grava, 20% de arena y 10% de limo arcilla y transportó trozos de materia orgánica y bloques mayores a 1 m³. Debido a la plasticidad del material, se lo clasificó como flujo de barro. La velocidad del movimiento se calculó usando un método empírico, coincidiendo su resultado con otros obtenidos en eventos cercanos. El volumen fue medido directamente en el campo, y calculado a través de ecuaciones enunciadas para flujos similares. Según los registros históricos de los depósitos de diferentes eventos ocurridos en la quebrada del arroyo del Comedero, esta se ubica en un rango de probabilidad muy alta de que se produzcan flujos. Con respecto a la clasificación de la magnitud del flujo de barro sobre el río Reyes, este pertenece a la clase con consecuencias potenciales de destrucción parcial de poblados, infraestructura de rutas y puentes, y bloqueo de quebradas. Los datos de velocidad, volumen y frecuencia calculados en este trabajo, que forman parte de la Carta de Peligrosidad Geológica Salta del SEGEMAR, son necesarios para el mapeo de peligrosidad, la programación de obras de infraestructura y la planificación territorial.

  8. Alternativas para conocer el comportamiento de la calidad del agua en un tramo del arroyo guachinango

    Directory of Open Access Journals (Sweden)

    Jeny Pérez P.

    2008-01-01

    Full Text Available En el mundo actual ha evolucionado la tecnología para tratamiento y reutilización de aguas residuales, pero la obtención y aplicación de las mismas conlleva grandes inversiones, por lo que un país como el nuestro no está al alcance de la misma. Esto conlleva a la búsqueda de alternativas que se ajusten a nuestro presupuesto y nuestras condiciones, siempre que las mismas cumplan con las medidas de protección e higiene que existen para la utilización de estas aguas. En un tramo de arroyo con vertimientos fundamentalmente urbanos se realizan estudios preliminares con la intención de predecir la calidad de las aguas superficiales contaminadas a partir del seguimiento de indicadores físico químicos. El presente trabajo pretende estimar la calidad del agua a partir de la determinación de los parámetros: pH, conductividad eléctrica, sólidos totales, contenido de nitratos. El estudio se llevó a cabo en el arroyo Guachinango, uno de los afluentes del río Luyanó que atraviesa el municipio San Miguel del Padrón en el sureste de Ciudad de la Habana. Para ello se parte del seguimiento de estos indicadores en puntos escogidos a partir del levantamiento de las fuentes contaminantes. Con los datos obtenidos se realizaron análisis estadísticos y se determinó la calidad del agua.

  9. Layers and Boulders in Crater Wall, Nepenthes Mensae Region

    Science.gov (United States)

    1999-01-01

    Peering down into craters offers Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) scientists an opportunity to examine one of the few landforms that Mars shares in common with the other planets and moons of our Solar System.The picture on the left (above) is a MOC context frame taken at the same time as the MOC high resolution image on the right. The white box on the left shows the location of the high resolution view. The high resolution image was targeted on a 3 kilometers (1.9 miles) wide impact crater on the floor of a larger crater in the Nepenthes Mensae region (near 3oS, 239oW). The context image is about 115 km (71 mi) across, the high-resolution image is 3 km (1.9 mi) across, and both are illuminated from the left/lower left.The 3 km diameter crater in the MOC image on the right is three times wider than the famous Meteor Crater in northern Arizona, USA. The high resolution image shows many small windblown drifts or dunes in the low areas both within the crater and outside on the surrounding terrain. Some portions of the crater's walls exhibit outcrops of bare, layered rock. Large boulders have been dislodged from the walls and have tumbled down the slopes to the crater floor. Many of these boulders are bigger than school buses and automobiles.

  10. Geología y registros magnéticos entre arroyo La Tapera y Santa Clara del Mar, Mar del Plata Geology and magnetic records between Arroyo La Tapera and Santa Clara del Mar, Mar del Plata

    Directory of Open Access Journals (Sweden)

    J.C. Bidegain

    2005-09-01

    Full Text Available Estudios paleomagnéticos se realizaron en secuencias del Pleistoceno-Holoceno del sector comprendido entre el arroyo La Tapera y Santa Clara del Mar, en Mar del Plata. Los sedimentos de la base de los perfiles en el arroyo La Tapera y en Camet, que se interpreta pertenecen a la Formación Ensenada, contienen direcciones de polaridad reversa y se asignan al cron Matuyama. Las capas sedimentarias de la base del perfil de Santa Clara del Mar, solo presentan direcciones de polaridad normal, por consiguiente toda la secuencia sedimentaria de esta localidad se asigna al cron Brunhes, (Paleomagnetic studies were carried out in Pleistocene-Holocene sedimentary sequences exposed between Arroyo La Tapera and Santa Clara del Mar in Mar del Plata. The sediments exposed in the lower part of the La Tapera and Camet sections, which apparently belong to the Ensenada Formation, show reverse polarity directions and are assigned to the Matuyama Polarity Chron. The sedimentary layers exposed at the base in Santa Clara del Mar present normal directions of polarity, hence they were consequently assigned to the Brunhes Polarity Chron (< 0,78 Ma. Susceptibility values show a similar behaviour to those obtained in other localities of the Argentine loess plateau. Lowest values are always related to stronger pedogenesis and weathering. Consequently we envisage that the windblown titanomagnetites, having settled out during drier glacial periods, account for the natural magnetic remanence and the higher susceptibility values in less weathered layers.

  11. 75 FR 45657 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2010-08-03

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY... of human remains in the control of the University of Colorado Museum, Boulder, CO. The human remains... this notice. A detailed assessment of the human remains was made by the University of Colorado...

  12. 75 FR 28647 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2010-05-21

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY... of human remains in the possession of the University of Colorado Museum, Boulder, CO. The human... this notice. A detailed assessment of the human remains was made by University of Colorado...

  13. 75 FR 26988 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2010-05-13

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY... of human remains in the possession of the University of Colorado Museum, Boulder, CO. The human... this notice. A detailed assessment of the human remains was made by University of Colorado...

  14. 75 FR 77898 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2010-12-14

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY... of human remains in the possession of the ] University of Colorado Museum, Boulder, CO. The human... made by University of Colorado Museum professional staff in consultation with representatives of...

  15. 75 FR 45655 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2010-08-03

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY... of human remains in the control of the University of Colorado Museum, Boulder, CO. The human remains.... A detailed assessment of the human remains was made by the University of Colorado...

  16. Size-frequency distribution of boulders ≥10 m on comet 103P/Hartley 2

    Science.gov (United States)

    Pajola, Maurizio; Lucchetti, Alice; Bertini, Ivano; Marzari, Francesco; A'Hearn, Michael F.; La Forgia, Fiorangela; Lazzarin, Monica; Naletto, Giampiero; Barbieri, Cesare

    2016-01-01

    Aims: We derive the size-frequency distribution of boulders on comet 103P/Hartley 2, which are computed from the images taken by the Deep Impact/HRI-V imaging system. We indicate the possible physical processes that lead to these boulder size distributions. Methods: We used images acquired by the High Resolution Imager-Visible CCD camera on 4 November 2010. Boulders ≥10 m were identified and manually extracted from the datasets with the software ArcGIS. We derived the global size-frequency distribution of the illuminated side of the comet (~50%) and identified the power-law indexes characterizing the two lobes of 103P. The three-pixel sampling detection, together with the shadowing of the surface, enables unequivocally detection of boulders scattered all over the illuminated surface. Results: We identify 332 boulders ≥10 m on the imaged surface of the comet, with a global number density of nearly 140/km2 and a cumulative size-frequency distribution represented by a power law with index of -2.7 ± 0.2. The two lobes of 103P show similar indexes, i.e., -2.7 ± 0.2 for the bigger lobe (called L1) and -2.6+ 0.2/-0.5 for the smaller lobe (called L2). The similar power-law indexes and similar maximum boulder sizes derived for the two lobes both point toward a similar fracturing/disintegration phenomena of the boulders as well as similar lifting processes that may occur in L1 and L2. The difference in the number of boulders per km2 between L1 and L2 suggests that the more diffuse H2O sublimation on L1 produce twice the boulders per km2 with respect to those produced on L2 (primary activity CO2 driven). The 103P comet has a lower global power-law index (-2.7 vs. -3.6) with respect to 67P. The global differences between the two comets' activities, coupled with a completely different surface geomorphology, make 103P hardly comparable to 67P. A shape distribution analysis of boulders ≥30 m performed on 103P suggests that the cometary boulders show more elongated shapes

  17. Shallow Structure of the Eagle Rock and Raymond Faults in Arroyo Seco, Los Angeles County, California

    Science.gov (United States)

    Scheirer, D. S.; Rymer, M. J.; Catchings, R. D.; Goldman, M.; Fuis, G.

    2012-12-01

    To understand the location, dip, and possible structural connection of the Eagle Rock and Raymond faults in Pasadena and South Pasadena, California, we acquired and analyzed high-resolution seismic reflection and refraction data, as well as gravity observations, along the floor of the Arroyo Seco. The studies were conducted to aid in understanding the seismic hazards of these faults in this urban setting. Seismic reflection and refraction data, including both P-wave and S-wave records, were collected along two profiles, a 1.2-km-long northern profile crossing the Eagle Rock fault, and a 450-m-long southern profile crossing the Raymond fault. Seismic sources were Betsy-Seisgun shots, accelerated weight drops, and repeated sledge-hammer impacts, which were recorded on multi-channel seismograph systems connected to vertical- and horizontal-component geophones spaced at a 5-m interval. Gravity data were collected along a single ~3-km-long profile coincident with and extending beyond and between the two seismic profiles, with stations spaced every 25-m near the fault traces and at greater intervals farther from the fault traces. We carefully accounted for the gravity effects of the adjacent concrete drainage channel and of the walls of the arroyo, to generate gravity anomalies that reflect sub-surface density contrasts across the Eagle Rock and Raymond faults. Seismic reflection image quality is compromised by the highly-deformed Miocene strata offset by these faults. However, reflection and especially refraction results indicate that both the Eagle Rock and Raymond faults consist of multiple, steeply-north-dipping fault strands. P- and S-wave seismic tomography results of the uppermost 50-100 m yield velocity variations that can be converted to probable density variations, and thus be included in the gravity anomaly analysis. The gravity anomalies predicted from the velocity variations account for less than one-third of the anomalies observed across the faults

  18. Boulders on asteroid Toutatis as observed by Chang'e-2

    CERN Document Server

    Jiang, Yun; Huang, Jiangchuan; Marchi, Simone; Li, Yuan; Ip, Wing-Huen

    2015-01-01

    Boulders are ubiquitously found on the surfaces of small rocky bodies in the inner solar system and their spatial and size distributions give insight into the geological evolution and collisional history of the parent bodies. Using images acquired by the Chang'e-2 spacecraft, more than 200 boulders have been identified over the imaged area of the near-Earth asteroid Toutatis. The cumulative boulder size frequency distribution (SFD) shows a steep slope of -4.4 $\\pm$ 0.1, which is indicative of a high degree of fragmentation. Similar to Itokawa, Toutatis probably has a rubble-pile structure, as most boulders on its surface cannot solely be explained by impact cratering. The significantly steeper slope for Toutatis' boulder SFD compared to Itokawa may imply a different preservation state or diverse formation scenarios. In addition, the cumulative crater SFD has been used to estimate a surface crater retention age of approximately 1.6 $\\pm$ 0.3 Gyr.

  19. Boulder Capture System Design Options for the Asteroid Robotic Redirect Mission Alternate Approach Trade Study

    Science.gov (United States)

    Belbin, Scott P.; Merrill, Raymond G.

    2014-01-01

    This paper presents a boulder acquisition and asteroid surface interaction electromechanical concept developed for the Asteroid Robotic Redirect Mission (ARRM) option to capture a free standing boulder on the surface of a 100 m or larger Near Earth Asteroid (NEA). It details the down select process and ranking of potential boulder capture methods, the evolution of a simple yet elegant articulating spaceframe, and ongoing risk reduction and concept refinement efforts. The capture system configuration leverages the spaceframe, heritage manipulators, and a new microspine technology to enable the ARRM boulder capture. While at the NEA it enables attenuation of terminal descent velocity, ascent to escape velocity, boulder collection and restraint. After departure from the NEA it enables, robotic inspection, sample caching, and crew Extra Vehicular Activities (EVA).

  20. Characterization of salinity and selenium loading and land-use change in Montrose Arroyo, western Colorado, from 1992 to 2010

    Science.gov (United States)

    Moore, Jennifer L.

    2011-01-01

    Salinity and selenium are naturally occurring and perva-sive in the lower Gunnison River Basin of Colorado, includ-ing the watershed of Montrose Arroyo. Although some of the salinity and selenium loading in the Montrose Arroyo study area is from natural sources, additional loading has resulted from the introduction of intensive irrigation in the water-shed. With increasing land-use change and the conversion from irrigated agricultural to urban land, land managers and stakeholders need information about the long-term effects of land-use change on salinity and selenium loading. In response to the need to advance salinity and selenium science, the U.S. Geological Survey, in cooperation with the Bureau of Reclamation, Colorado River Basin Salinity Control Forum, and Colorado River Water Conservation District, developed a study to characterize salinity and selenium loading and how salinity and selenium sources may relate to land-use change in Montrose Arroyo. This report characterizes changes in salinity and selenium loading to Montrose Arroyo from March 1992 to February 2010 and the magnitude of land-use change between unirrigated desert, irrigated agricultural, and urban land-use/land-cover types, and discusses how the respective loads may relate to land-use change. Montrose Arroyo is an approximately 8-square-mile watershed in Montrose County in western Colorado. Salinity and selenium were studied in Montrose Arroyo in a 2001 study as part of a salinity- and selenium-control lateral project. The robust nature of the historical dataset indicated that Montrose Arroyo was a prime watershed for a follow-up study. Two sites from the 2001 study were used to monitor salinity and selenium loads in Montrose Arroyo in the follow-up study. Over the period of 2 water years and respective irrigation seasons (2008-2010), 27 water-quality samples were collected and streamflow measurements were made at the historical sites MA2 and MA4. Salinity and selenium concen-trations, loads

  1. Origin of zoning within dedolomite and calcitized gypsum of the Mississippian Arroyo Penasco Group

    Energy Technology Data Exchange (ETDEWEB)

    Ulmer, D.S.

    1985-01-01

    The Mississippian Arroyo Penasco Group carbonates are the oldest Paleozoic rocks present in north-central New Mexico. These supratidal to shallow,subtidal sediments exhibit complex diagenetic fabrics produced by periods of pre-Pennsylvanian subaerial exposure. Both extensive recrystallization of the Espiritu Santo carbonates and brecciation of the overlying Macho Member of the Tererro Formation resulted from an extended period of Mississippian subaerial exposure of broad, low-relief tidal flats. Cathodoluminescent petrography indicates that the recrystallized limestones consist of calcite pseudomorphs of dolomite and gypsum. Dedolomite and calcitized gypsum crystals, with /sup 13/C//sup 12/C ratios of -2 to +1.5% PDB, range from highly zoned to uniformly luminescent. Electron microprobe analyses reveals variable Mn and Fe contents across the pseudomorphs which are responsible for differences in observed luminosity. These features are interpreted to reflect a period of subaerial exposure after deposition of Macho Member sediments, which caused dissolution of gypsum and dolomite by sulfate and Mg depleted meteoric fluids and produced the collapse breccia. Preservation of zoning within some pseudomorphs required simultaneous dissolution of gypsum and dolomite and precipitation of calcite. C-isotope data indicates a meteoric to mixed phreatic origin for pore fluids which precipitated calcite; repetitive zoning within dolomite and gypsum pseudomorphs is indicative of interactions between marine and meteoric phreatic fluids in the intertidal environment.

  2. Adaptive Optics: Arroyo Simulation Tool and Deformable Mirror Actuation Using Golay Cells

    Science.gov (United States)

    Lint, Adam S.

    2005-01-01

    The Arroyo C++ libraries, written by Caltech post-doc student Matthew Britton, have the ability to simulate optical systems and atmospheric signal interference. This program was chosen for use in an end-to-end simulation model of a laser communication system because it is freely distributed and has the ability to be controlled by a remote system or "smart agent." Proposed operation of this program by a smart agent has been demonstrated, and the results show it to be a suitable simulation tool. Deformable mirrors, as a part of modern adaptive optics systems, may contain thousands of tiny, independently controlled actuators used to modify the shape of the mirror. Each actuator is connected to two wires, creating a cumbersome and expensive device. Recently, an alternative actuation method that uses gas-filled tubes known as Golay cells has been explored. Golay cells, operated by infrared lasers instead of electricity, would replace the actuator system thereby creating a more compact deformable mirror. The operation of Golay cells and their ability to move a deformable mirror in excess of the required 20 microns has been demonstrated. Experimentation has shown them to be extremely sensitive to pressure and temperature, making them ideal for use in a controlled environment.

  3. Arroyo channel head evolution in a flash-flood-dominated discontinuous ephemeral stream system

    Science.gov (United States)

    DeLong, Stephen B.; Johnson, Joel P.L.; Whipple, Kelin X.

    2014-01-01

    We study whether arroyo channel head retreat in dryland discontinuous ephemeral streams is driven by surface runoff, seepage erosion, mass wasting, or some combination of these hydrogeomorphic processes. We monitored precipitation, overland flow, soil moisture, and headcut migration over several seasonal cycles at two adjacent rangeland channel heads in southern Arizona. Erosion occurred by headward retreat of vertical to overhanging faces, driven dominantly by surface runoff. No evidence exists for erosion caused by shallow-groundwater–related processes, even though similar theater-headed morphologies are sometimes attributed to seepage erosion by emerging groundwater. At our field site, vertical variation in soil shear strength influenced the persistence of the characteristic theater-head form. The dominant processes of erosion included removal of grains and soil aggregates during even very shallow (1–3 cm) overland flow events by runoff on vertical to overhanging channel headwalls, plunge-pool erosion during higher-discharge runoff events, immediate postrunoff wet mass wasting, and minor intra-event dry mass wasting on soil tension fractures developing subparallel to the headwall. Multiple stepwise linear regression indicates that the migration rate is most strongly correlated with flow duration and total precipitation and is poorly correlated with peak flow depth or time-integrated flow depth. The studied channel heads migrated upslope with a self-similar morphologic form under a wide range of hydrological conditions, and the most powerful flash floods were not always responsible for the largest changes in landscape form in this environment. 

  4. Geomorphological control on boulder transport and coastal erosion before, during and after an extreme extra-tropical cyclone

    OpenAIRE

    Naylor, Larissa A.; Stephenson, Wayne J.; Smith, Helen C.M.; Way, Oliver; Mendelssohn, James; Cowley, Andrew

    2016-01-01

    Extreme wave events in coastal zones are principal drivers of geomorphic change. Evidence of boulder entrainment and erosional impact during storms is increasing. However, there is currently poor time coupling between pre- and post-storm measurements of coastal boulder deposits. Importantly there are no data reporting shore platform erosion, boulder entrainment and/or boulder transport during storm events – rock coast dynamics during storm events are currently unexplored. Here, we use high-re...

  5. Investigación cuantitativa del transporte de sedimentos en avenidas torrenciales: aplicación al caso del arroyo del partido Huelva

    OpenAIRE

    Sendra Arce, Pablo

    2002-01-01

    La Tesis aborda los problemas clásicos de la Hidráulica Torrencial, utilizando de referente el arroyo del Partido, que en el periodo 1982-99 ha generado un gran cono de sedimentación en la Marisma de El Rocío (Parque Nacional de Doñana). De este modo: 1,- Profundiza en la conceptualización del significado de un curso torrencial. 2,- Analiza los eventos torrenciales acaecidos en la cuenca vertiente del citado arroyo entre 1995-99, ensayando con su información las principales ecuaciones de tran...

  6. Co-precipitation/Adsorption of Boron for Treatment of Produced Water at the Arroyo Grande Oil Field, California

    OpenAIRE

    Wörlén, Cecilia

    2008-01-01

    The goal of this Master’s thesis project is to develop a method for boron precipitation inproduced waters from the Arroyo Grande oil field outside San Luis Obispo in centralCalifornia. The current oil recovery is a closed system that pumps up to 1,500 barrelsoil/day. A new system is proposed to increase oil production three times andsimultaneously dewater half of the water in the oil formation during the time span of tenyears, which amounts to 55,000 barrels/day. The water will be treated and...

  7. Muerte súbita cardíaca en comunidades de arroyo naranjo en el periodo 2000-2010

    OpenAIRE

    Ochoa Montes, Luis Alberto

    2013-01-01

    Introducción: La Muerte súbita cardíaca dada su elevada incidencia y el dramatismo en su presentación representa un importante desafío en el siglo XXI. Objetivo: Describir la presentación de la muerte súbita cardíaca en las comunidades de Arroyo Naranjo durante el período 2000-2010. Método: Estudio observacional, descriptivo y transversal. Resultados: Se registraron 10014 muertes naturales, de las cuales 1000 (10,0%) fueron súbitas. Las mayores tasas se evidenciaron en mujeres negras...

  8. Densidad del Mono aullador Alouatta seniculus (Linnaeus, 1766) Mammalia: primates en el arroyo coloso, Departamento de Sucre, Colombia

    OpenAIRE

    Fajardo Patiño Alirio; De la Ossa Velasquez Jaime L.

    1996-01-01

    Nueve manadas de Alouatta seniculus, fueron estudiadas a lo largo de tres meses y medio, entre Mayo y Agosto de 1983. Se tomaron en cuenta aspectos relativos al estado y densidad poblacional en el Arroyo Colosó, Departamento de Sucre. Se establece una relación de los datos obtenidos y procesados en este trabajo con los suministrados por otros autores en estudios similares con la misma especie y en diferentes lugares.Nine troops of Alouatta seniculus, were studied for a period of three and hal...

  9. Dinámica litoral de la costa de Tres Arroyos y SanCayetano, Buenos Aires

    OpenAIRE

    Germán R. Bértola; Luis C. Cortizo; Federico I. Isla

    2009-01-01

    La erosión costera de laprovincia de Buenos Aires es originada por lo general a causas naturales, aunquealgunas veces obedecen a causas antrópicas. En los partidos de San Cayetano yTres Arroyos los problemas costeros se limitan a las villas balnearias -y susplayas-, en áreas turísticas con desarrollo incipiente. La fijación de médanos(Balneario San Cayetano) o la excesiva forestación (Claromecó, Reta y Orense)han provocado grandes acumulaciones de arena sobre viejos acantilados, elbloqueo de ...

  10. Riesgo de contaminación del acuífero arroyo Alamar en Tijuana, Baja California

    OpenAIRE

    Marnie González Estévez; Vicente Sánchez Munguía

    2013-01-01

    El acuífero del arroyo Alamar, en Tijuana, Baja California, es uno de los escasos suministros de agua con que cuenta esta ciudad. En el área que recorre el Alamar se realizan actividades que, aunadas a la falta de medidas de control y vigilancia, inciden en la contaminación del lugar. De acuerdo con las fuentes contaminantes examinadas en el presente estudio, aquí se presentan resultados de un ejercicio de evaluación del riesgo de contaminación al que está expuesto el acuífero, mediante la in...

  11. Measured and Inferred Bedrock Faults in the Boulder-Weld Coal Field (frifaultu)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This file is a digital line representation of measured and inferred bedrock faults in the Boulder-Weld coal field, Denver Basin, Colorado. This file was created as...

  12. Evaluation of a Multifamily Retrofit in Climate Zone 5, Boulder, Colorado (Fact Sheet)

    Energy Technology Data Exchange (ETDEWEB)

    2013-11-01

    In 2009, a 37-unit apartment complex located in Boulder, Colorado, underwent an energy retrofit to comply with Boulder SmartRegs Ordinance, a mandate that requires all rental properties to meet certain energy efficiency standards by 2018. The Consortium of Advanced Residential Buildings (CARB), a U.S. Department of Energy Building America team, worked with city planners and building owners to evaluate this program and recently completed a case study evaluating the effectiveness of a collection of retrofit measures.

  13. Indoor air quality in Latino homes in Boulder, Colorado

    Science.gov (United States)

    Escobedo, Luis E.; Champion, Wyatt M.; Li, Ning; Montoya, Lupita D.

    2014-08-01

    Indoor concentrations of airborne pollutants can be several times higher than those found outdoors, often due to poor ventilation, overcrowding, and the contribution of indoor sources within a home. Americans spend most of their time indoors where exposure to poor indoor air quality (IAQ) can result in diminished respiratory and cardiovascular health. This study measured the indoor air quality in 30 homes of a low-income Latino community in Boulder, Colorado during the summer of 2012. Participants were administered a survey, which included questions on their health conditions and indoor air pollution sources like cigarette smoke, heating fuel, and building materials. Twenty-four hour samples of fine particulate matter (PM2.5) from the indoor air were collected in each home; ambient PM2.5 samples were collected each day as well. Concurrent air samples were collected onto 47 mm Teflo and Tissuquartz filter at each location. Teflo filters were analyzed gravimetrically to measure PM2.5 and their extracts were used to determine levels of proteins and endotoxins in the fine fraction. The Tissuquartz filters were analyzed for elemental and organic carbon content (EC/OC). Results indicated that the indoor air contained higher concentrations of PM2.5 than the ambient air, and that the levels of OC were much higher than EC in both indoor and outdoor samples. This community showed no smoking in their homes and kept furry pets indoors at very low rates; therefore, cooking is likely the primary source of indoor PM. For responders with significant exposure to PM, it appeared to be primarily from occupational environments or childhood exposure abroad. Our findings indicate that for immigrant communities such as this, it is important to consider not only their housing conditions but also the relevant prior exposures when conducting health assessments.

  14. Shallow Geophysical Exploration of the Boulder Creek Critical Zone Observatory

    Science.gov (United States)

    Befus, K. M.; Kelsay, T.; Sheehan, A. F.; Leopold, M.

    2009-12-01

    We use minimally invasive shallow geophysical techniques to image the structure of the critical zone from surface to bedrock (0-20 m) throughout three catchments within the Boulder Creek Critical Zone Observatory (BcCZO). Shallow seismic refraction (SSR), electrical resistivity tomography (ERT) and ground penetrating radar (GPR) provide three complementary methods for determining the physical characteristics of the shallow subsurface. A total of 10 km of SSR surveys were collected in Summer 2009 using a hammer source and 24-channel seismograph. The SSR data were modeled using both the time-term method and travel-time tomography. Results of the SSR surveys provide a pseudo-3D network of critical zone compressional wave velocity (Vp) structure within each catchment. Select SSR lines follow each of the ERT and GPR lines investigated providing an essential supplement for interpretation and view of layering within the critical zone. The evolution of each catchment within the BcCZO contain signals of both erosion and weathering dependent upon the large-scale geomorphic processes down to the microbial weathering of mineral grains. The geophysical approach describes the arena for the small-scale processes while also providing a quantitative description of the critical zone structure at an instant in time. We use these tools to establish a three-dimensional model of critical zone architecture within three catchments with significantly different recent and continuing geomorphic forcings: fluvial rejuvenation, long-term quiescent erosion and glaciation. We find bedrock Vp greater than 2500 m/s, regolith Vp generally less than 450 m/s and various gradients of weathered bedrock ranging from Vp of 700-2000 m/s if present. Significant topography and irregular bedrock surfaces contribute additional complexity to the critical zone architecture in each location. Once developed this model will guide investigations of critical zone processes from landscape to hydrologic modeling and

  15. Fifty Years of Space Weather Forecasting from Boulder

    Science.gov (United States)

    Berger, T. E.

    2015-12-01

    The first official space weather forecast was issued by the Space Disturbances Laboratory in Boulder, Colorado, in 1965, ushering in an era of operational prediction that continues to this day. Today, the National Oceanic and Atmospheric Administration (NOAA) charters the Space Weather Prediction Center (SWPC) as one of the nine National Centers for Environmental Prediction (NCEP) to provide the nation's official watches, warnings, and alerts of space weather phenomena. SWPC is now integral to national and international efforts to predict space weather events, from the common and mild, to the rare and extreme, that can impact critical technological infrastructure. In 2012, the Strategic National Risk Assessment included extreme space weather events as low-to-medium probability phenomena that could, unlike any other meteorogical phenomena, have an impact on the government's ability to function. Recognizing this, the White House chartered the Office of Science and Technology Policy (OSTP) to produce the first comprehensive national strategy for the prediction, mitigation, and response to an extreme space weather event. The implementation of the National Strategy is ongoing with NOAA, its partners, and stakeholders concentrating on the goal of improving our ability to observe, model, and predict the onset and severity of space weather events. In addition, work continues with the research community to improve our understanding of the physical mechanisms - on the Sun, in the heliosphere, and in the Earth's magnetic field and upper atmosphere - of space weather as well as the effects on critical infrastructure such as electrical power transmission systems. In fifty years, people will hopefully look back at the history of operational space weather prediction and credit our efforts today with solidifying the necessary developments in observational systems, full-physics models of the entire Sun-Earth system, and tools for predicting the impacts to infrastructure to protect

  16. "War on Terror" Is a Curative: Recontextualization and Political Myth-Making in Gloria Macapagal-Arroyo's 2002-2004 State of the Nation Addresses

    Science.gov (United States)

    Navera, Gene Segarra

    2011-01-01

    The article examines the State of the Nation addresses (SONA) delivered by Philippine President Gloria Macapagal-Arroyo (2001-2010) from 2002-2004, during which time she actively invoked the need to engage in the U.S. government-led "global war on terror." It specifically investigates how these presidential speeches recontextualized the war on…

  17. Boulder accumulations related to extreme wave events on the eastern coast of Malta

    Science.gov (United States)

    Biolchi, S.; Furlani, S.; Antonioli, F.; Baldassini, N.; Causon Deguara, J.; Devoto, S.; Di Stefano, A.; Evans, J.; Gambin, T.; Gauci, R.; Mastronuzzi, G.; Monaco, C.; Scicchitano, G.

    2015-10-01

    The accumulation of large boulders related to waves generated either by tsunamis or extreme storm events has been observed in different areas of the Mediterranean Sea. Along the NE and E low-lying rocky coasts of Malta tens of large boulder deposits have been surveyed, measured and mapped. These boulders have been detached and moved from the seafloor and lowest parts of the coast by the action of sea waves. In the Sicily-Malta channel, heavy storms are common and originate from the NE and NW winds. Conversely, few severe earthquakes and tsunamis are recorded in historical documents to have hit the Maltese archipelago, originated by seismicity activity related mainly to the Malta Escarpment, the Sicily Channel Rift Zone and the Hellenic Arc. We present a multi-disciplinary study, which aims to define the characteristics of the boulder accumulations along the eastern coast of Malta, in order to assess the coastal geo-hazard implications triggered by the sheer ability of extreme waves to detach and move large rocky blocks inland. The wave heights required to transport coastal boulders were calculated using various hydrodynamic equations. Particular attention was devoted to the quantification of the input parameters required in the workings of these equations. The axis sizes of blocks were measured with 3-D digital photogrammetric techniques and their densities were obtained throughout the use of a N-type Schmidt Hammer. Moreover, AMS ages were obtained from selected marine organisms encrusted on some of the boulders in various coastal sites. The combination of the results obtained by hydrodynamic equations and the radiocarbon dating suggests that the majority of the boulders has been detached and moved by intense storm waves. Nonetheless, it is possible that some of them may have been transported by tsunami.

  18. Directed random-walk model for boulder clustering in step-pool streams

    Science.gov (United States)

    Martin, R.; Jerolmack, D. J.

    2009-12-01

    Step-pool streams are boulder-bedded channels displaying a characteristic stair-step longitudinal profile. Steep steps are formed from clusters of boulders that can span the entire width of the channel, while the intervening pools are flatter sections containing smaller clasts. The formation of steps confers additional stability to boulders, which often remain stationary even when bed shear stresses are significantly higher than the predicted initiation of motion criterion. Researchers have attempted to model step-pools as traditional bed forms resulting from strong interactions between the flow field and the river bed. A recent alternative hypothesis is that steps are the result of “jamming”, a phase transition that occurs in granular flows in chutes when the grain size becomes a significant fraction of the chute width. Here we examine the formation of steps using a stochastic model for boulder movement and deposition, focusing on the self-organization that arises from grain-grain interactions. Downstream motion of boulders is treated as a directed random walk, with the channel walls acting as reflecting boundaries. Probability for deposition of individual boulders increases when they come in contact with other boulders and also with channel banks. We demonstrate that this simple model successfully reproduces much of the boulder-clustering behavior observed in natural and experimental streams. Channel-spanning 'steps' arise naturally as a result of local grain interactions, and the frequency of step formation increases rapidly with decreasing channel width below the critical jamming width of ten grain diameters. In the large width limit steps cannot form; however, boulder clustering still occurs. The formation and break-up of grain clusters produces highly intermittent sediment transport rates over a wide range of scales. Our results suggest that step formation is a consequence of generic grain clustering dynamics in a confined space, and does not depend

  19. Block and boulder transport in Eastern Samar (Philippines) during Supertyphoon Haiyan

    Science.gov (United States)

    May, S. M.; Engel, M.; Brill, D.; Cuadra, C.; Lagmay, A. M. F.; Santiago, J.; Suarez, J. K.; Reyes, M.; Brückner, H.

    2015-12-01

    Fields of dislodged boulders and blocks record catastrophic coastal flooding during strong storms or tsunamis and play a pivotal role in coastal hazard assessment. Along the rocky carbonate coast of Eastern Samar (Philippines) we documented longshore transport of a block of 180 t and boulders (up to 23.5 t) shifted upslope to elevations of up to 10 m above mean lower low water level during Supertyphoon Haiyan on 8 November 2013. Initiation-of-motion approaches indicate that boulder dislocation occurred with flow velocities of 8.9-9.6 m s-1, which significantly exceeds depth-averaged flow velocities of a local coupled hydrodynamic and wave model (Delft3D) of the typhoon with a maximum < 1.5 m s-1. These results, in combination with recently published phase-resolving wave models, support the hypothesis that infragravity waves induced by the typhoon were responsible for the remarkable flooding pattern in Eastern Samar, which are not resolved in phase-averaged storm surge models. Our findings show that tsunamis and hydrodynamic conditions induced by tropical cyclones may shift boulders of similar size and, therefore, demand a careful re-evaluation of storm-related transport where it, based on the boulder's sheer size, has previously been ascribed to tsunamis.

  20. Arroyo Limay chico: un ejemplo de captura fluvial en la cuenca superior del Río Limay (SE de Neuquén

    Directory of Open Access Journals (Sweden)

    Emilio F. González Díaz

    2008-03-01

    Full Text Available Se describe un proceso de captura fluvial, por erosión retrocedente, del arroyo Limay Chico -afluente del río Limay- sobre el sector austral de las cabeceras de la cuenca de drenaje del arroyo Alicurá, tributaria a su vez del río Collón Cura. Se interpreta que la causal del fenómeno estuvo relacionada con las nuevas condiciones climáticas postglaciarias (más húmedas y la contemporánea profundización del troncal río Limay, morfológicamente expresada por modernas terrazas de erosión inferiores, las que fueran reconocidas en la zona de afluencia del arroyo Limay Chico, con anterioridad al llenado del embalse de Alicurá. Además, la captura fluvial y el consecuente desvío de los caudales de un tramo de las nacientes del arroyo Alicurá hacia la cuenca del Limay Chico, mostró condiciones o factores previos coadyuvantes: 1 la disposición topográfica inferior de la cuenca de éste último con respecto a la de Alicurá; 2 la mayor pendiente y la localización del valle del arroyo Limay Chico a lo largo de una zona de debilidad estructural y litológica representada por la falla Limay Chico, asistió la dinámica de la erosión fluvial retrógrada; 3 la disposición transversal de las cabeceras de la cuenca del arroyo Alicurá. Se han reconocido abras de viento e interpretado dos probables codos de captura. El consiguiente aumento de la descarga del arroyo Limay Chico, promovió en su cuenca un fenómeno local de rejuvenecimiento estático. También se acepta una estrecha relación entre el cambio climático postglaciario y la ocurrencia de los múltiples deslizamientos rotacionales observados a lo largo de la abrupta escarpa de falla generada por la falla Limay Chico, presumiéndose que la activa y coetánea erosión lateral del arroyo Limay Chico, contribuyó al proceso gravitacional. Estos deslizamientos, que se caracterizan por la coalescencia lateral de sus muescas de desprendimiento, han generado el distintivo e irregular paisaje

  1. Densidad del Mono aullador Alouatta seniculus (Linnaeus, 1766 Mammalia: primates en el arroyo coloso, Departamento de Sucre, Colombia

    Directory of Open Access Journals (Sweden)

    Fajardo Patiño Alirio

    1996-12-01

    Full Text Available Nueve manadas de Alouatta seniculus, fueron estudiadas a lo largo de tres meses y medio, entre Mayo y Agosto de 1983. Se tomaron en cuenta aspectos relativos al estado y densidad poblacional en el Arroyo Colosó, Departamento de Sucre. Se establece una relación de los datos obtenidos y procesados en este trabajo con los suministrados por otros autores en estudios similares con la misma especie y en diferentes lugares.Nine troops of Alouatta seniculus, were studied for a period of three and half months betwen May and August of 1983. Relevant facts of the condition and population density in the Colosó stream, located in Sucre Deparment, were taken. A relation is stablished among the facts obtained and processed in this investigation with facts provided by another authors in similar studies with the same specie in different locations.

  2. Caracterización climática de la cuenca del Arroyo Claromecó, Argentina

    Directory of Open Access Journals (Sweden)

    María Elízabeth Carbone

    2003-01-01

    Full Text Available Se presenta la climatología de la cuenca hidrográfica del Arroyo Claromecó, ubicado en el sudeste de la provincia de Buenos Aires, República Argentina. La cuenca se encuentra en un clima templado. La temperatura media anual en el sector correspondiente a la cuenca varía entre 13,5ºCy 14,5ºC. La temperatura media máxima de 24,1ºC ocurre durante enero. Las temperatura medias mínimas oscilan entre 1,1ºC y 3,1ºC durante el mes de julio. Las precipitaciones varían a lo largo de la cuenca, desde 900 a 750 mm La variabilidad temporal de las precipitaciones marca un aumento de las mismas a partir de la década de los 80, el incremento es de más de 100 mm. Las máximas lluvias se presentan en primavera y otoño, durante los meses de octubre y marzo, respectivamente. La humedad relativa para el área estudiada oscila entre 61 y 78%. Los mayores valores medios de humedad relativa se presentan durante el otoño e invierno y los menores durante el verano. En la cuenca del arroyo Claromecó se observa que la presión atmosférica media anual varía entre 986.3 y 1005 hPa. Los vientos predominantes corresponden a los del sector Norte y Noroeste durante las cuatro estaciones. Las condiciones climáticas del área permiten el desarrollo de las actividades agrícolas ganaderas.

  3. A note of caution on the use of boulders for exposure dating of depositional surfaces

    Science.gov (United States)

    Schmidt, Silke; Hetzel, Ralf; Kuhlmann, Jan; Mingorance, Francisco; Ramos, Victor A.

    2011-02-01

    Exposure dating of boulders has been widely applied to determine the age of depositional surfaces under the assumption that the pre-depositional nuclide component in most boulders is negligible. Here we present a case study on fluvial terraces at the active mountain front of the eastern Andes, where this assumption is clearly invalid, because sandstone boulders (n = 13) from terraces at two sites contain a highly variable inherited 10Be component and have apparent 10Be ages that exceed the age of the respective surface by up to ~ 90 ka. Likewise, boulders from active stream channels (n = 5) contain a substantial inherited 10Be component, equivalent to 5-48 ka of exposure. The age of the fluvial terraces is well determined by two approaches that allow to correct for the pre-depositional nuclide component: 10Be dating of amalgamated pebbles and 10Be depth profiles on sand samples. At site 1, three terraces have 10Be ages of 3-5 ka (T2), 11-13 ka (T3), and 16-20 ka (T4), which are consistent with the terrace stratigraphy. The age of terrace T3 is confirmed by a calibrated 14 C age of 12.61 ± 0.20 ka BP obtained from a wood sample. At site 2, terrace T3 has a 10Be age of 13-16 ka. The average inherited 10Be concentration of sand grains - determined from depth profiles and stream sediments - is small and equivalent to 1-3 ka of exposure. In contrast, the mean inheritance of pebbles and boulders is higher and equivalent to exposure times of ~ 10 ka and ~ 30 ka, respectively. These differences in the pre-depositional nuclide component are related to the different provenance and transport history of sand, pebbles, and boulders. The sand is derived from rapidly eroding Miocene sediments exposed near the mountain front, whereas the pebbles and boulders originate from Triassic sandstones in the internal part of the fold-and-thrust belt. On their way to the mountain front, boulders and pebbles were temporarily stored and irradiated in alluvial fans that are currently reworked

  4. Evaluation of Boulder, CO, SmartRegs Ordinance and Better Buildings Program

    Energy Technology Data Exchange (ETDEWEB)

    Arena, L.; Vijayakumar, G.

    2012-04-01

    Under the SmartRegs ordinance in the city of Boulder, Colorado, all rental properties in the city must achieve an energy efficiency level comparable to a HERS Index of approximately 120 points or lower by the year 2019. The City of Boulder received a $12 million grant from the DOE's Better Buildings initiative to create and incentivize their EnergySmart Program. In this report, the Consortium for Advanced Residential Buildings (CARB) describes its work with the program, including energy audits of rental properties, developing training programs for insulators and inspectors, and conducting interviews with property owners.

  5. Evaluation of Boulder, CO,SmartRegs Ordinance and Better Buildings Program

    Energy Technology Data Exchange (ETDEWEB)

    Arena, L. [Consortium for Advanced Residential Buildings (CARB), Norwalk, CT (United States); Vijayakumar, G. [Consortium for Advanced Residential Buildings (CARB), Norwalk, CT (United States)

    2012-04-01

    Under the SmartRegs ordinance in the city of Boulder, Colorado, all rental properties in the city must achieve an energy efficiency level comparable to a HERS Index of approximately 120 points or lower by the year 2019. The City of Boulder received a $12 million grant from the DOE’s Better Buildings initiative to create and incentivize their EnergySmart Program. In this report, the Consortium for Advanced Residential Buildings (CARB) describes its work with the program, including energy audits of rental properties, developing training programs for insulators and inspectors, and conducting interviews with property owners.

  6. Boulder accumulations related to extreme wave events on the eastern coast of Malta

    Science.gov (United States)

    Biolchi, Sara; Furlani, Stefano; Antonioli, Fabrizio; Baldassini, Niccoló; Causon Deguara, Joanna; Devoto, Stefano; Di Stefano, Agata; Evans, Julian; Gambin, Timothy; Gauci, Ritienne; Mastronuzzi, Giuseppe; Monaco, Carmelo; Scicchitano, Giovanni

    2016-03-01

    The accumulation of large boulders related to waves generated by either tsunamis or extreme storm events have been observed in different areas of the Mediterranean Sea. Along the eastern low-lying rocky coasts of Malta, five sites with large boulder deposits have been investigated, measured and mapped. These boulders have been detached and moved from the nearshore and the lowest parts of the coast by sea wave action. In the Sicily-Malta channel, heavy storms are common and originate from the NE and NW winds. Conversely, few tsunamis have been recorded in historical documents to have reached the Maltese archipelago. We present a multi-disciplinary study, which aims to define the characteristics of these boulder accumulations, in order to assess the coastal geo-hazard implications triggered by the sheer ability of extreme waves to detach and move large rocky blocks inland. The wave heights required to transport 77 coastal boulders were calculated using various hydrodynamic equations. Particular attention was given to the quantification of the input parameters required in the workings of these equations, such as size, density and distance from the coast. In addition, accelerator mass spectrometry (AMS) 14C ages were determined from selected samples of marine organisms encrusted on some of the coastal boulders. The combination of the results obtained both by the hydrodynamic equations, which provided values comparable with those observed and measured during the storms, and radiocarbon dating suggests that the majority of the boulders have been detached and moved by intense storm waves. These boulders testify to the existence of a real hazard for the coasts of Malta, i.e. that of very high storm waves, which, during exceptional storms, are able to detach large blocks of volumes exceeding 10 m3 from the coastal edge and the nearshore bottom, and also to transport them inland. Nevertheless, the occurrence of one or more tsunami events cannot be ruled out, since

  7. Discrete Element Method Simulation of a Boulder Extraction From an Asteroid

    Science.gov (United States)

    Kulchitsky, Anton K.; Johnson, Jerome B.; Reeves, David M.; Wilkinson, Allen

    2014-01-01

    The force required to pull 7t and 40t polyhedral boulders from the surface of an asteroid is simulated using the discrete element method considering the effects of microgravity, regolith cohesion and boulder acceleration. The connection between particle surface energy and regolith cohesion is estimated by simulating a cohesion sample tearing test. An optimal constant acceleration is found where the peak net force from inertia and cohesion is a minimum. Peak pulling forces can be further reduced by using linear and quadratic acceleration functions with up to a 40% reduction in force for quadratic acceleration.

  8. Microfossils in the Ordovician erratic boulders from South-western Finland

    Directory of Open Access Journals (Sweden)

    Nõlvak, J.

    1995-12-01

    Full Text Available Chitinozoans, ostracods and acritarchs found in four glacially transported limestone boulders from the south-western coast of Finland have been studied in order to test the usefulness of these microfossil groups in age determinations. Also rare specimens of conodonts, inarticulated brachiopods and foraminifers were found. Baltic limestone (or Östersjö limestone was the most problematic, because only fossils with calcitic or phosphatic shells are preserved. It is concluded that the boulders identified correlate with the Uhaku and Rakvere stages of the Middle Ordovician.

  9. Arroyo Limay chico: un ejemplo de captura fluvial en la cuenca superior del Río Limay (SE de Neuquén)

    OpenAIRE

    Emilio F González Díaz; Silvia Castro Godoy

    2008-01-01

    Se describe un proceso de captura fluvial, por erosión retrocedente, del arroyo Limay Chico -afluente del río Limay- sobre el sector austral de las cabeceras de la cuenca de drenaje del arroyo Alicurá, tributaria a su vez del río Collón Cura. Se interpreta que la causal del fenómeno estuvo relacionada con las nuevas condiciones climáticas postglaciarias (más húmedas) y la contemporánea profundización del troncal río Limay, morfológicamente expresada por modernas terrazas de erosión inferiores...

  10. Astronaut Charles Duke examines surface of boulder at North Ray crater

    Science.gov (United States)

    1972-01-01

    Astronaut Charles M. Duke Jr., lunar module pilot of the Apollo 16 lunar landing mission, examines the surface of a large boulder at North Ray crater during the third Apollo 16 extravehicular activity (EVA-3) at the Descartes landing site. This picture was taken by Astronaut John W. Young, commander. Note the chest-mounted 70mm Hasselblad camera.

  11. 75 FR 47488 - FM Table of Allotments, Boulder Town, Levan, Mount Pleasant, and Richfield, UT

    Science.gov (United States)

    2010-08-06

    ... proposed transmitter site was unavailable due to its location in a national forest. See 71 FR 29886 (May 24..., Report and Order, 71 FR 76208 (December 20, 2006). The CDBS will reflect Channel 229C at Mount Pleasant... COMMISSION 47 CFR Part 73 FM Table of Allotments, Boulder Town, Levan, Mount Pleasant, and Richfield,...

  12. 76 FR 14063 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2011-03-15

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The University of Colorado Museum has completed... affiliated with the human remains and associated funerary objects may contact the University of...

  13. 76 FR 62839 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2011-10-11

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The University of Colorado Museum has completed... contact the University of Colorado Museum. Disposition of the human remains to the Indian tribes...

  14. 75 FR 42771 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2010-07-22

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY... of human remains and associated funerary objects in the control of the University of Colorado Museum... assessment of the human remains was made by the University of Colorado Museum professional staff...

  15. 75 FR 57290 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2010-09-20

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY... of human remains and associated funerary objects in the control of the University of Colorado Museum... assessment of the human remains was made by the University of Colorado Museum professional staff...

  16. 76 FR 62833 - Notice of Inventory Completion: University of Colorado Museum, Boulder, CO

    Science.gov (United States)

    2011-10-11

    ... National Park Service Notice of Inventory Completion: University of Colorado Museum, Boulder, CO AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The University of Colorado Museum has completed... contact the University of Colorado Museum. Disposition of the human remains and associated funerary...

  17. Distribución de tierras raras en soluciones y coloides de un sistema natural de aguas ácidas (Arroyo del Val, Zaragoza)

    OpenAIRE

    López Julián, P. L.; Zamora, A.; Mandado, J.; Gimeno, M. J.; Tena, J. M.; Auqué, L. F.

    1993-01-01

    Acidic waters of the «Arroyo del Val» stream are naturally generated by oxidation of sulfide minerals dispersed in the sedimentary materials of the drainage basin. Mixing of this acidic stream with neutral-alkaline tributaries yields spectacular iron and aluminium rich flocculants that precipitate at the confluences. Previous analysis of rare earth element (REE) concentrations of sorne 0.1 I-tm-filtered water samples and colloids are shown. The shale-normalized REE patte...

  18. Aswan site on comet 67P/Churyumov-Gerasimenko: Morphology, boulder evolution, and spectrophotometry

    Science.gov (United States)

    Pajola, Maurizio; Oklay, Nilda; La Forgia, Fiorangela; Giacomini, Lorenza; Massironi, Matteo; Bertini, Ivano; El-Maarry, M. R.; Marzari, Francesco; Preusker, Frank; Scholten, Frank; Höfner, Sebastian; Lee, Jui-Chi; Vincent, Jean-Baptiste; Groussin, Olivier; Naletto, Giampiero; Lazzarin, Monica; Barbieri, Cesare; Sierks, Holger; Lamy, Philippe; Rodrigo, Rafael; Koschny, Detlef; Rickman, Hans; Keller, Horst U.; Agarwal, Jessica; A'Hearn, Michael F.; Barucci, Maria A.; Bertaux, Jean-Loup; Cremonese, Gabriele; Da Deppo, Vania; Davidsson, Björn; De Cecco, Mariolino; Debei, Stefano; Ferri, Francesca; Fornasier, Sonia; Fulle, Marco; Güttler, Carsten; Gutierrez, Pedro J.; Hviid, Stubbe F.; Ip, Wing-Huen; Jorda, Laurent; Knollenberg, Jörg; Kramm, J.-Rainer; Küppers, Michael; Kürt, Ekkehard; Lara, Luisa M.; Lin, Zhong-Yi; Lopez Moreno, Jose J.; Magrin, Sara; Michalik, Harald; Mottola, Stefano; Thomas, Nicholas; Tubiana, Cecilia

    2016-07-01

    Aims: We provide a detailed morphological analysis of the Aswan site on comet 67P/Churyumov-Gerasimenko (67P). We derive the size-frequency distribution of boulders ≥2 m and correlate this distribution with the gravitational slopes for the first time on a comet. We perform the spectral analysis of this region to understand if possible surface variegation is related to thedifferent surface textures observable on the different units. Methods: We used two OSIRIS Narrow Angle Camera (NAC) image data sets acquired on September 19 and 22, 2014, with a scale of 0.5 m/px. Gravitational slopes derived from the 3D shape model of 67P were used to identify and interpret the different units of the site. By means of the high-resolution NAC data sets, boulders ≥2.0 m can be unambiguously identified and extracted using the software ArcGIS. Coregistered and photometrically corrected color cubes were used to perform the spectral analyses, and we retrieved the spectral properties of the Aswan units. Results: The high-resolution morphological map of the Aswan site (0.68 km2) shows that this site is characterized by four different units: fine-particle deposits located on layered terrains, gravitational accumulation deposits, taluses, and the outcropping layered terrain. Multiple lineaments are identified on the Aswan cliff, such as fractures, exposed layered outcrops, niches, and terraces. Close to the terrace margin, several arched features observed in plan view suggest that the margin progressively retreats as a result of erosion. The size-frequency of boulders ≥2 m in the entire study area has a power-law index of -3.9 +0.2/-0.3 (1499 boulders ≥2 m/km2), suggesting that the Aswan site is mainly dominated by gravitational events triggered by sublimation and/or thermal insolation weathering causing regressive erosion. The boulder size-frequency distribution versus gravitational slopes indicates that when higher gravitational slope terrains are considered, only boulders ≤10 m

  19. Origin of John's Stone: A quartzitic boulder from the site of the 1908 Tunguska (Siberia) explosion

    Science.gov (United States)

    Bonatti, Enrico; Breger, Dee; Di Rocco, Tommaso; Franchi, Fulvio; Gasperini, Luca; Polonia, Alina; Anfinogenov, John; Anfinogenova, Yana

    2015-09-01

    An exotic meter-size quartzitic boulder known as John's Stone was found by John Anfinogenov in 1972 buried in permafrost close to the epicenter of the 1908 Tunguska blast in a region of Siberia dominated by Permian-Triassic Siberian Trap basalts. The boulder is made almost entirely of well-cemented quartz grains, mostly around 100 μm in size; it contains zones with coarser or finer grain sizes. Rare zircon and rutile crystals are scattered within the quartz matrix. Quartz is often dissected by strain lamellae. The rock contains abundant scattered internal vugs rimmed by euhedral quartz crystals. We cannot exclude that John's Stone is a fragment of a Permian granite-derived sandstone unit. However, based on structure, mineralogy and chemistry the quartzitic boulder may have originated due to silica deposition from hydrothermal solutions that had reacted with basaltic rocks. Anfinogenov et␣al. (Anfinogenov, J. et␣al. [2014]. Icarus 243, 139-147) interpreted features observed in the permafrost at the base of the boulder as indicating it impacted from above, suggesting the boulder may be a meteorite, possibly of martian origin, given the reported presence on Mars of silica-rich deposits. Triple oxygen isotope ratios determined on two samples of the quartzite reveal a terrestrial rather than a martian meteorites composition. Oxygen isotope data suggest also that the precipitation of SiO2 could have occurred in equilibrium with hydrothermal water (δ18Ow ≈ -19.5‰) at the temperature of about 50 °C. The thermal event that generated the quartzite may be related either to the century-old Tunguska Event, or, more probably, to Permian-Triassic Siberian Traps magmatism, although an extraterrestrial origin cannot be completely ruled out.

  20. Assessing the Impacts of Climate and Land Use Change on Streamflow and Nutrient Loading in the Arroyo Colorado Watershed in Southern Texas

    Science.gov (United States)

    Osidele, O.; Sun, A.; Green, R.

    2011-12-01

    Based on results of the Second National Climate Assessment reported in 2009, the U.S. Global Change Research Program projects temperatures in southern Texas will increase 5 to 8° F by the end of the 21st century, with larger changes occurring under scenarios of higher greenhouse gas emissions. Temperature increases in summer are projected to be larger than in winter. Although drier conditions are expected in the region, sea-level rise, extreme rainfall events, and associated storm surges are projected to occur more frequently because of the likely increase in intensity of hurricanes and tropical storms in the Gulf of Mexico. The range of possible responses to climate change is attributable to a combination of characteristics at global, regional, and local scales. The risk of flooding and catastrophic infrastructure damage due to global climate phenomena has been incorporated into local climate adaptation plans for many low-lying areas and communities in the Gulf Coast region of southern Texas. However, because this region is dominated by irrigated agriculture and the population is projected to double by 2050, it is important to examine how climate change will affect water resources and environmental quality. The purpose of this study is to investigate the potential hydrologic and water quality impacts of projected climate change, land use change, and population change scenarios in the headwaters of the Arroyo Colorado. The results of this work will provide content for a web-based, collaborative geospatial decision support system being developed to support environmental management in the Arroyo Colorado Watershed. Presently, land use in the Arroyo Colorado Watershed is more than 50 percent agricultural and almost 25 percent residential with varying levels of urbanization. As a result, flow in the Arroyo Colorado is sustained primarily by discharge from municipal wastewater treatment facilities, irrigation return flows, and urban storm runoff. In this study

  1. Índices de calidad ambiental de aguas del Arroyo Caañabe mediante tests microbiológicos y ecotoxicológico

    Directory of Open Access Journals (Sweden)

    Tomás López Arias

    2016-06-01

    Full Text Available El Arroyo Caañabe, es un curso de agua que corre a través de los Departamentos Central y Paraguarí (República del Paraguay. Las descargas de origen agropecuario, urbano e industrial contaminan sus aguas. En este trabajo se evalúa la calidad del arroyo mediante sus características fisicoquímicas, ecotoxicológicas, microbiológicas y se la comparan con la legislación vigente. Se colectaron muestras en los meses de Julio y Setiembre del año 2014. Se estudiaron tres sitios denominados S1, ubicado en aguas arriba de la Ciudad de Carapegua; S2 en la intersección del arroyo con la Ruta 1, y S3, en la zona límite de las ciudades de Carapegua y Nueva Italia. Se realizaron ensayos de toxicidad aguda con Daphnia magna, Lactuca sativa, y alevines de Danio rerio; además de ensayos crónicos en Tetradesmus wisconsinenesis, D. rerio y Allium cepa. Se evaluaron los grupos y especies microbianos siguientes: aerobios mesófilos, enterobacterias, coliformes totales, coliformes fecales, E. coli, Pseudomona aeruginosa, mohos y levaduras; además se determinaron índices de calidad y de contaminación. Los resultados indican que las aguas del arroyo presentaron características de clase II y de clase III según el padrón establecido por la Secretaría del Ambiente del Paraguay. El índice de calidad de agua (ICA arrojó valores comprendidos entre 52 y 62 lo que otorga la clasificación de "regular"; mientras que el índice de contaminación trófica (ICOTRO presentó valores entre 0,12 y 0.26, indicando "eutrofización". Los recuentos de coliformes fueron superiores en el segundo muestreo, aunque dentro lo establecido por la norma. La presencia de P. aeruginosa en los tres puntos constituye un riesgo para la salud. Ensayos ecotoxicológicos agudos mostraron que las aguas presentan escasos efectos letales, no obstante los ensayos crónicos en A. cepa y el test de micronúcleos en D. rerio indican potenciales efectos citotóxicos y genotóxicos de las

  2. Dinámica litoral de la costa de Tres Arroyos y SanCayetano, Buenos Aires Coastal littoral dynamics of Tres Arroyosand San Cayetano, Buenos Aires

    Directory of Open Access Journals (Sweden)

    Germán R. Bértola

    2009-06-01

    Full Text Available La erosión costera de laprovincia de Buenos Aires es originada por lo general a causas naturales, aunquealgunas veces obedecen a causas antrópicas. En los partidos de San Cayetano yTres Arroyos los problemas costeros se limitan a las villas balnearias -y susplayas-, en áreas turísticas con desarrollo incipiente. La fijación de médanos(Balneario San Cayetano o la excesiva forestación (Claromecó, Reta y Orensehan provocado grandes acumulaciones de arena sobre viejos acantilados, elbloqueo de algunas desembocaduras de arroyos y la desactivación de rampas dedunas (desde las playas a los topes de los acantilados. A través decaracterizaciones morfológicas y sedimentológicas se ha logrado discriminar lossitios de mayor impacto. Debido a la fijación por pastos naturales, los médanostransversales han tomado diseños parabólicos. Esto no ha impedido que algunossectores como en el Balneario San Cayetano o Dunamar en Claromecó, losproblemas de fijación de dunas persistan. Las playas de Tres Arroyos son lasmás extensas de la región y particularmente las de Claromecó, son las queexperimentaron mayor variabilidad. Los mayores cambios de la línea de ribera seubicaron en las desembocaduras de los arroyos, como en Quequén Salado yClaromecó, y en el tramo entre el arroyo Cristiano Muerto y el Balneario SanCayetano, con variaciones de +6 a -6 m/año. Comparando las granulometríasmuestreadas con 45 años de diferencia, se reconoce que las arenas de ambosmunicipios no han cambiado sustancialmente. Los perfiles permitieron reconocerperíodos erosivos (-3.900 m³ y acumulativos (6.300 m³.Coastal erosion ofBuenos Aires Province isoriginated in general by natural causes, but sometimes is produced by antropiccauses. In San Cayetano y Tres Arroyos counties, coastal problems areconcentrated in touristic villages and their beaches. Dunes fixation inBalneario San Cayetano or their afforestation in Claromecó, Reta and Orense,have provoked significant

  3. Spatial heterogeneity of temperature across alpine boulder fields in New South Wales, Australia: multilevel modelling of drivers of microhabitat climate

    Science.gov (United States)

    Shi, Haijing; Paull, David; Rayburg, Scott

    2016-07-01

    Understanding the spatial heterogeneity of temperatures across a region is significant for identification and protection of potential microhabitats for species conservation. However, this task is proving difficult because multiple factors drive the temperatures of microhabitats and their effect differs at different scales. In the Australian alpine region, boulder field habitats have been identified as important refugia for a range of small mammals. Vegetation cover and elevation have been found to drive thermal buffering at the level of single sampling sites within boulder fields, whereas the aspect and inclination of slopes have been found to affect thermal buffering at the level of clusters of boulder fields. But how the rock structure (number of rock layers, rock size and cavity of boulders) influences microclimate of boulder fields remains an open question. We used a multilevel modelling approach to detect the factors driving microhabitat temperatures in different seasons at different spatial scales in an Australian alpine region. We found that significant temperature differences existed within and between clusters of boulder fields in different seasons. Besides elevation and vegetation cover, the number of rock layers and rock cavity size also exerts important influences on extreme temperatures at the site (i.e. single boulder field) scale. Topographical variables such as slope gradient and elevation influenced minimum temperatures at the boulder field cluster scale. Variations in boulder field temperatures were significant at fine scales, with variations in minimum temperatures exceeding those of maximum temperatures. We suggest that variations in slope gradient and elevation, interacting with vegetation cover, the number of rock layers and rock cavity size can lead to fine-grained thermal variability, which potentially provides refugia for species at microsites, even when regional climatic conditions become less suitable for their survival.

  4. Spatial heterogeneity of temperature across alpine boulder fields in New South Wales, Australia: multilevel modelling of drivers of microhabitat climate.

    Science.gov (United States)

    Shi, Haijing; Paull, David; Rayburg, Scott

    2016-07-01

    Understanding the spatial heterogeneity of temperatures across a region is significant for identification and protection of potential microhabitats for species conservation. However, this task is proving difficult because multiple factors drive the temperatures of microhabitats and their effect differs at different scales. In the Australian alpine region, boulder field habitats have been identified as important refugia for a range of small mammals. Vegetation cover and elevation have been found to drive thermal buffering at the level of single sampling sites within boulder fields, whereas the aspect and inclination of slopes have been found to affect thermal buffering at the level of clusters of boulder fields. But how the rock structure (number of rock layers, rock size and cavity of boulders) influences microclimate of boulder fields remains an open question. We used a multilevel modelling approach to detect the factors driving microhabitat temperatures in different seasons at different spatial scales in an Australian alpine region. We found that significant temperature differences existed within and between clusters of boulder fields in different seasons. Besides elevation and vegetation cover, the number of rock layers and rock cavity size also exerts important influences on extreme temperatures at the site (i.e. single boulder field) scale. Topographical variables such as slope gradient and elevation influenced minimum temperatures at the boulder field cluster scale. Variations in boulder field temperatures were significant at fine scales, with variations in minimum temperatures exceeding those of maximum temperatures. We suggest that variations in slope gradient and elevation, interacting with vegetation cover, the number of rock layers and rock cavity size can lead to fine-grained thermal variability, which potentially provides refugia for species at microsites, even when regional climatic conditions become less suitable for their survival. PMID:26511483

  5. A NEW FINDING ON THE OCCURRENCE OF GOLDEN GECKO (CALODACTYLODES AUREUS IN THE ROCK BOULDERS NEAR VELLORE TOWN

    Directory of Open Access Journals (Sweden)

    M.RAJASEKHAR

    2007-01-01

    Full Text Available Golden geckos (Calodactylodes aureus are reported for the first time in the rock boulders nearVellore Town ,North Arcot district of Tamilnadu,India . Vellore Town is surrounded by smallhillocks with huge boulders. Those hillocks which are elevated at 50 to 100 meters are locations.A survey was made within fifteen kilometers radius towards east of Vellore town .Surprisinglygolden geckos are observed in these locations contrary to the habitat described earlier .Hence thereport emphasizes that golden geckos can also be seen in dry ,drought and high temperaturezones where huge rock boulders are present and not only in the mountains of high altitudes withhigh rainfall and humidity.

  6. El volcanismo del complejo Marifil en Arroyo Verde, vertiente suroriental del Macizo de Somún Cura, Chubut

    Directory of Open Access Journals (Sweden)

    Marcelo J Márquez

    2010-05-01

    Full Text Available Se describen en este trabajo las facies volcánicas pertenecientes al Complejo Marifil que afloran en la localidad de Arroyo Verde, vertiente suroriental del macizo de Somún Cura, provincia del Chubut. Se discriminan facies de ignimbritas riolíticas, brechas piroclásticas, domos y domos vítreos traquíticos y diques riolíticos. Las relaciones de campo indican que las ignimbritas fueron el primer evento eruptivo que se alternaron con esporádicas coladas de bloques y cenizas. Luego se produjo la intrusión de las facies dómicas y por último la de los diques riolíticos. Las facies descriptas tienen composiciones que varían entre riolitas y traquitas con altos contenidos de K, característicos de las rocas pertenecientes a este complejo. Teniendo en cuenta las características observadas se propone un mecanismo fisural de erupción en esta localidad.

  7. Podnikatelská plán pro založení boulder centra

    OpenAIRE

    Herman, Jan

    2010-01-01

    Diplomová práce se zabývá sestavením podnikatelského záměru pro založení Boulder Centra v Brně. Jde o horolezeckou stěnu spojenou s možností posezení. Na základě ekonomických analýz je sestaven podnikatelský plán, který určuje šanci a podmínky realizace daného projektu. The Master Thesis deals with a business plan for setting up a Boulder Centre in Brno. The centre will comprise of a gym for rock climbing and a bar. The bussines plan is based on economic analyses and determines the conditi...

  8. The quantitative estimation of the vulnerability of brick and concrete wall impacted by an experimental boulder

    OpenAIRE

    Zhang, J.; Guo, Z. X.; Wang, D; Qian, H.

    2016-01-01

    There is little historic data about the vulnerability of damaged elements due to debris flow events in China. Therefore, it is difficult to quantitatively estimate the vulnerable elements suffered by debris flows. This paper is devoted to the research of the vulnerability of brick and concrete walls impacted by debris flows. An experimental boulder (an iron sphere) was applied to be the substitute of debris flow since it can produce similar shape impulse load on elements as ...

  9. Extent of Abandoned Underground Coal Mines and Surface Mines in the Boulder-Weld Coal Field (friminedu)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This file is a digital polygon representation of the areal extent of abandoned underground coal mines and surface mines in the Boulder-Weld coal field, Denver...

  10. Existing Whole-House Solutions Case Study: Evaluation of a Multifamily Retrofit in Climate Zone 5, Boulder, Colorado

    Energy Technology Data Exchange (ETDEWEB)

    None

    2013-11-01

    In 2009, a 37-unit apartment complex located in Boulder, Colorado, underwent an energy retrofit to comply with Boulder SmartRegs Ordinance, a mandate that requires all rental properties to meet certain energy efficiency standards by 2018. The Consortium of Advanced Residential Buildings (CARB), a U.S. Department of Energy Building America team, worked with city planners and building owners to evaluate this program and recently completed a case study evaluating the effectiveness of a collection of retrofit measures.

  11. La zona de alteración Arroyo La Chilca-Zanjón del Buitre, bloque de San Rafael, Mendoza The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza

    Directory of Open Access Journals (Sweden)

    Nora Rubinstein

    2012-06-01

    Full Text Available La zona de alteración Arroyo La Chilca-Zanjón del Buitre está ubicada en el bloque de San Rafael (35°24'8" S; 68°19'25,8" O, Mendoza. Estudios previos definieron preliminarmente que corresponde a un sistema de tipo pórfro cuprífero vinculado genéticamente al magmatismo gondwánico. Esta área de alteración se desarrolla en una secuencia compuesta por brechas ignimbríticas e ignimbritas traquiandesíticas con intercalaciones de areniscas tobáceas y coladas andesíticas a las que intruyen cuerpos subvolcánicos andesíticos y traquiandesítico-dacíticos. La litología de la secuencia volcánica así como sus características geoquímicas confirman su correlación con la sección inferior del ciclo magmático Choiyoi (Pérmico inferior. El área de alteración presenta una zona potásica con una asociación compuesta por feldespato potásico-cuarzo-magnetita. A ésta se superpone alteración fílica con una asociación de cuarzo-muscovita-pirita-(rutilo acompañada por venillas de cuarzo-pirita. Por último se reconoce una carbonatización tardía. En las proximidades de la zona de alteración aforan vetillas con mineralización de pirita-calcopirita-galena-esfalerita en ganga de cuarzo. La geoquímica de metales indica moderadas anomalías de Ag y Au y pequeñas anomalías de Cu, Mo, Pb y Zn. El análisis estadístico permite definir la existencia de un pulso mineralizante de Cu-Mo y un segundo pulso de Mo reconocido solamente en Zanjón del Buitre. Asimismo se definen dos pulsos de Zn, uno de los cuales estaría genéticamente vinculado al Cu.The Arroyo La Chilca-Zanjón del Buitre alteration zone is located in the San Rafael Massif (35°24'8" S; 68°19'25,8" W, Mendoza. Previous works defined preliminary this deposit as a porphyry copper system genetically linked to the gondwanan magmatism. This alteration zone is hosted by a sequence composed of ignimbritic breccias and ignimbrites of trachyandesitic composition with interbedded

  12. Boulders moved by the 29 September 2009 Tsunami: Flow-Speed Estimates at Taga, Samoa

    Science.gov (United States)

    Weiss, Robert; Fritz, Hermann

    2010-05-01

    On September 29, 2009 at 17:48:10 UTC (local time: UTC-11), an Mw ≈8.1 earthquake struck about 200 km S of the main Samoan Islands chain and 200 km E of Tonga's Niua Group. This is the most significant earthquake on the northern bend of the Tonga trench since 1917. At Taga, boulders of different sizes were observed; their distribution on the surface did not shore any recognizable pattern. It should be noted that the term 'boulder' in here is not applied to an indicated grain size, but to describe particles that have a size that cannot be neglected compared to the water depth. Taga village is located on south-central Savai'i Island, Samoa. The tsunami flooding reached about 180 m inundation and about 6m maximum runup . The tsunami waves were able to turn a empty water tank upside down and destroyed a house attached to a swimming pool. The flow depth reached 4 m marked by roof damage. In order to achieve estimates of the flow speed from the boulders on the surface, a few assumptions need to be made. Even though these assumptions simplify the physical problem almost to the level of the spherical cow, and yet they do not violate basic physics. Also, the initiation of motion is not considered, which is complex due to the necessary three-dimensional description of the turbulent flow field and shear-stress distribution around the boulder. Furthermore, the bedding and roughness in vicinity of the boulder is of pivotal importance for the initiation of motion. The first assumption is that the Froude number can be used to scale between the flow depth and the flow speed. The Froude number is the ratio of the flow speed and square root of gravity times the flow depth. It is classically used to evaluate the influence of inertia on a flow system and for scaling of gravity driven flows. The second assumption is that the boulders are spherical with varying bulk density. The last assumption is that the Rouse number can be employed to retrieve information on the transport mode. The

  13. Estado trófico de arroyos de la cuenca de Paso Severino mediante la utilización del índice biótico TSI-BI

    Directory of Open Access Journals (Sweden)

    Juan Pablo Pacheco

    2013-01-01

    Full Text Available Los macroinvertebrados acuáticos responden a las características de su ambiente reflejando las alteraciones en el mismo. Por ello, son frecuentemente utilizados como indicadores biológicos en estudios de calidad de agua y monitoreo ambiental. El índice de estado trófico TSI-BI creado para la cuenca del río Santa Lucía, que incluye la cuenca de estudio, permite conocer el estado trófico de los arroyos mediante su composición de macroinvertebrados acuáticos. El objetivo de este trabajo es evaluar el estado trófico de los arroyos de la cuenca del embalse Paso Severino a través de la comunidad de macroinvertebrados mediante el índice TSI-BI. El embalse es utilizado como fuente de agua potable para la zona sur densamente poblada del país. La zona ha tenido un importante desarrollo de la actividad lechera en las últimas décadas. Se seleccionaron 10 subcuencas pertenecientes a arroyos de órdenes 2-4 tomándose muestras estacionales (2009-2010 de macroinvertebrados con red de mano de 500 µm. Se analizaron la abundancia relativa y composición de los macroinvertebrados, estimándose el estado trófico de los arroyos mediante el índice TSI-BI. Todos los arroyos estudiados presentaron niveles altos a muy altos de contaminación orgánica situándose en los rangos eutrófico-hipereutrófico. Los arroyos de mayor estado trófico (hipereutróficos presentaron una comunidad dominada por Hirudinea y Crustacea, mientras que en los de menor nivel trófico se observó una mayor abundancia de Ephemeroptera y presencia de Trichoptera. Los altos niveles tróficos de los arroyos indicarían la existencia de impacto por nutrientes, que llevó a cambios en la comunidad de macroinvertebrados hacia el dominio de organismos tolerantes a la contaminación. Dado los altos niveles tróficos de estos arroyos, y considerando que son afluentes del embalse de Paso Severino, el índice empleado y los resultados obtenidos constituyen una importante herramienta de

  14. Procesis de formación y efectos tafonómicos en entierros humanos: el caso del sitio Arroyo Seco 2 en la región pampeana, Argentina

    OpenAIRE

    González, Mariela Edith

    2014-01-01

    En este trabajo se presentan parte de los resultados obtenidos del análisis tafonómico sobre los entierros humanos del sitio arqueológico Arroyo Seco 2 (partido de Tres Arroyos, provincia de Buenos Aires). Se destaca la pérdida de unidades óseas en frecuencias elevadas, con una tendencia a la subrepresentación de huesos de pequeño tamaño. Dada la modalidad primaria de inhumación de la mayoría de los individuos, se descarta que la manipulación antrópica intencional haya ocasionado estos faltan...

  15. Aspectos geológicos y geotécnicos preliminares de la fundación de la presa del Arroyo Blanco, Tandil

    OpenAIRE

    Giaconi, Luis Mario; Calvetty Amboni, Boris; Giaconi, Mario Nicolás

    2012-01-01

    El presente resumen trata sobre los aspectos geológicos y geotécnicos preliminares de la fundación de la presa A° Blanco ubicada al sur de la Ciudad de Tandil, Provincia de Buenos Aires. El propósito de la presa es contener y regular las crecientes torrenciales que recurrentemente provocan anegamientos en la ciudad ubicada aguas abajo. El área de proyecto comprende la cuenca hidrográfica del arroyo que desemboca precisamente en el denominado entubado del A° Blanco, desagüe pluvial subterráneo...

  16. Determinación del Vo2max en un grupo de adultos que practican natación recreativa en la ciudad de Tres Arroyos

    OpenAIRE

    Miranda, Diego

    2015-01-01

    El presente trabajo se encuadra dentro de la realidad de un grupo de personas que practican Natación de forma recreativa en la ciudad de Tres Arroyos. El tema que rige la investigación de la tesis se basa en la determinación del Consumo máximo de oxígeno (Vo2 max) de los nadadores a través de pruebas indirectas1, test máximo incremental de Lavoie realizadas en la piscina. Además se tomaron otros test en donde las variables fueron tiempo y distancia a máxima intensidad, estos fu...

  17. Potential-Field and Seismic Reflection/Refraction Studies of the Eagle Rock and Raymond Faults in Arroyo Seco, Los Angeles County, California

    Science.gov (United States)

    Scheirer, D. S.; Rymer, M. J.; Catchings, R. D.; Goldman, M.; Fuis, G. S.

    2010-12-01

    In August 2007, we acquired high-resolution gravity and seismic reflection and refraction data across the Eagle Rock and Raymond faults in the Arroyo Seco, located in Pasadena and South Pasadena, California. The studies were conducted to aid in understanding the seismic hazards of these faults in this urban setting, specifically to detect and determine the location of all faults passing through the area and to characterize their dip and possible structural connections. Gravity data were collected along a single ~3-km-long profile, with stations spaced every 25-m close to the fault traces and at greater intervals away from the fault traces. Gravity station elevations from Real-Time Kinematic GPS solutions, along with careful accounting for the gravity effects of the adjacent concrete drainage channel and of the walls of the arroyo, allow for the calculation of gravity anomalies that reflect sub-surface density contrasts across the Eagle Rock and Raymond faults. Seismic reflection and refraction data, including both P-wave and S-wave records, were collected along two profiles, a northern one crossing the Eagle Rock fault with a length of 1200 m, and a southern one crossing the Raymond fault with a length of 450 m. The seismic profiles coincided with the longer gravity profile along the floor of the Arroyo Seco. Seismic sources included Betsy-Seisgun shots, accelerated weight drops, and repeated sledge hammer impacts, and receivers were geophones spaced at a 5-m interval. S-waves were generated and recorded at a subset of sites on each of the seismic lines. Seismic reflection and refraction images indicate that both the Eagle Rock and Raymond faults are comprised of multiple, steeply-dipping fault strands. P- and S-wave seismic tomography of the uppermost 50-100 m show velocity variations that can be converted to likely density variations, which can in turn be subtracted from the density variation needed by the gravity anomaly analysis. This process of stripping off

  18. Expansión urbana e instrumentos de regulación de cuencas hídricas : Caso Arroyo “El pescado”

    OpenAIRE

    Dorsi, Luisina; Ríos, Licia; Lancioni, Alejandro

    2015-01-01

    La ponencia presenta avances del marco teórico-metodológico construido durante el avance de una beca de entrenamiento en la Investigación que pretende estudiar las diferentes relaciones entre los procesos recientes de crecimiento urbano y los instrumentos de protección de cuencas hídricas, en particular en la cuenca del arroyo El Pescado, declarada como “Paisaje Protegido” en el año 2005 por la Ley Provincial N° 12.247. Los principales interrogantes que conducen la investigación son: ¿Cuál es...

  19. Movilidad y utilización del ambiente en poblaciones cazadoras-recolectoras: la cuenca del arroyo Chasicó como caso de estudio

    OpenAIRE

    Catella, Luciana

    2014-01-01

    En esta tesis se presentan los resultados de una investigación arqueológica realizada en la cuenca del arroyo Chasicó, un área de aproximadamente 3800 km2, localizada en el sector sur de la denominada Área Ecotonal Húmedo-Seca Pampeana (AEHSP), más precisamente en la zona de transición entre las regiones Pampeana y Patagónica, abarcando tanto ambientes de transición, como ambientes con características propias de ambas regiones. Dichas investigaciones estuvieron orientadas a aportar informac...

  20. Análisis multitemporal del uso efectivo del territorio en la cuenca del Arroyo “Las Conchitas-Plátanos"

    OpenAIRE

    Calvo, Gabriela; Cipponeri, Marcos; Salvioli, Mónica L.; Trovatto, María Marta; Álvarez, Pilar; Cassorla, Laura Inés; Gamboa, Paula

    2014-01-01

    El presente trabajo consistió en estudiar, durante las últimas 5 décadas, los cambios en el uso efectivo del territorio, por causas antrópicas, en la cuenca del arroyo “Las Conchitas-Plátanos” perteneciente a la Franja Costera Sur del Río de la Plata. La misma se ubica en los partidos de Berazategui y Florencio Varela de la Provincia de Buenos Aires. Dicho análisis se llevó a cabo a través del uso de fotos aéreas e imágenes satelitales procesadas y analizadas en un entorno SIG.

  1. PLAN DE ACCIÓN SOBRE CAPITAL HUMANO EN EL POLICLÍNICO UNIVERSITARIO JULIÁN GRIMAU EN ARROYO NARANJO.

    OpenAIRE

    Griselda Molina Molina; Grisel Cristina Ricardo Molina; Roberto Hidalgo Mederos

    2012-01-01

    En el presente trabajo se recogen los resultados de estudios realizados a partir la bibliografía especializada sobre el Sistema de Gestión Integral de Recursos Humanos. Estos resultados constituyen los fundamentos teóricos de la tesis de maestría titulada Plan de Acción sobre Capital Humano en el Policlínico Universitario Julián Grimau de Arroyo Naranjo en la Habana. La investigación propone y valida acciones concretas que contribuyen al desarrollo del SGIRH según las características y funcio...

  2. Dinámica litoral de la costa de Tres Arroyos y SanCayetano, Buenos Aires Coastal littoral dynamics of Tres Arroyosand San Cayetano, Buenos Aires

    OpenAIRE

    Germán R. Bértola; Luis C. Cortizo; Federico I. Isla

    2009-01-01

    La erosión costera de laprovincia de Buenos Aires es originada por lo general a causas naturales, aunquealgunas veces obedecen a causas antrópicas. En los partidos de San Cayetano yTres Arroyos los problemas costeros se limitan a las villas balnearias -y susplayas-, en áreas turísticas con desarrollo incipiente. La fijación de médanos(Balneario San Cayetano) o la excesiva forestación (Claromecó, Reta y Orense)han provocado grandes acumulaciones de arena sobre viejos acantilados, elbloqueo de ...

  3. Una verdadera "isla en el nuevo sur". Las donaciones condicionadas en el arroyo Azul durante el rosismo

    Directory of Open Access Journals (Sweden)

    Sol Lanteri

    2007-01-01

    Full Text Available En el marco del estudio de la política de tierras fiscales implementada por el gobierno de Rosas en la campaña de Buenos Aires, en el presente trabajo nos proponemos enfocar la atención en la modalidad de las donaciones condicionadas, que sólo se hicieron efectivas en un área de la frontera sur, el arroyo Azul, a partir de 1832. De tal forma, comenzaremos estableciendo las particularidades que presentó su proceso colonizador, para luego analizar el impacto local que tuvo la entrega de predios estatales durante el período 1820-1860, con el objeto de establecer con mayor precisión el peso de las donaciones comparado con otras formas de otorgamiento en la ocupación del espacio y en la estructura de la tenencia del recurso en el lugar. Asimismo, en un último apartado estableceremos las características centrales que manifestaron las transacciones entre particulares, para lograr una mayor definición de los procesos abordados.In the context of the study of the policy of fiscal lands implemented by Rosas government in Buenos Aires countryside, this work focuses on the modality known as "conditioned donations", that since 1832 became effective only in an area of the south frontier, the Azul stream. So that, we begin establishing the particularities that the settlement process presented, and then we analyze the local impact that the cessions of fiscal lands had during the period 1820- 1860, in order to find out with more precision the importance of donations compared with other grant forms in space occupation and in the structure of the holding of the resource. Finally, in a last section we establish the central characteristics of transactions among private hands, to attain a more accurate definition of the processes involved.

  4. Neural network prediction of carbonate lithofacies from well logs, Big Bow and Sand Arroyo Creek fields, Southwest Kansas

    Science.gov (United States)

    Qi, L.; Carr, T.R.

    2006-01-01

    In the Hugoton Embayment of southwestern Kansas, St. Louis Limestone reservoirs have relatively low recovery efficiencies, attributed to the heterogeneous nature of the oolitic deposits. This study establishes quantitative relationships between digital well logs and core description data, and applies these relationships in a probabilistic sense to predict lithofacies in 90 uncored wells across the Big Bow and Sand Arroyo Creek fields. In 10 wells, a single hidden-layer neural network based on digital well logs and core described lithofacies of the limestone depositional texture was used to train and establish a non-linear relationship between lithofacies assignments from detailed core descriptions and selected log curves. Neural network models were optimized by selecting six predictor variables and automated cross-validation with neural network parameters and then used to predict lithofacies on the whole data set of the 2023 half-foot intervals from the 10 cored wells with the selected network size of 35 and a damping parameter of 0.01. Predicted lithofacies results compared to actual lithofacies displays absolute accuracies of 70.37-90.82%. Incorporating adjoining lithofacies, within-one lithofacies improves accuracy slightly (93.72%). Digital logs from uncored wells were batch processed to predict lithofacies and probabilities related to each lithofacies at half-foot resolution corresponding to log units. The results were used to construct interpolated cross-sections and useful depositional patterns of St. Louis lithofacies were illustrated, e.g., the concentration of oolitic deposits (including lithofacies 5 and 6) along local highs and the relative dominance of quartz-rich carbonate grainstone (lithofacies 1) in the zones A and B of the St. Louis Limestone. Neural network techniques are applicable to other complex reservoirs, in which facies geometry and distribution are the key factors controlling heterogeneity and distribution of rock properties. Future work

  5. ARTEFACTOS DE USO DIARIO REPRESENTADOS EN LA COLECCIÓN CERÁMICA DEL ARROYO LEYES: SU EMPLEO EN LA DETERMINACIÓN DE CRONOLOGÍA / Daily use artifacts represented in the Arroyo de Leyes pottery collection: their use in the determination of chronology

    Directory of Open Access Journals (Sweden)

    Carlos Natalio Ceruti

    2014-12-01

    Full Text Available Se analizan artefactos de uso diario (implementos para mate, una alcancía, un vaso de cuerno y una “canasta” para el juego del pato representados en la colección cerámica del sitio Los Zapallos, sobre el Arroyo Leyes (departamento Garay, provincia de Santa Fe, Argentina. Se describen los elementos, localizados en un contexto considerado prima facie como obra de individuos esclavizados pertenecientes a vecinos de Santa Fe la Vieja (siglo XVII; pero que también puede contener materiales correspondientes a las culturas indígenas contemporáneas o anteriores a la conquista; a los siglos XVIII-XIX, y “falsificaciones” de comienzos del siglo XX. Se intenta ubicar cada uno de ellos en la escala temporal a partir del análisis de pasta y decoración de la pieza, y de la consistencia argumental derivada de la documentación escrita.   Palabras clave: Arroyo Leyes, arqueología de la esclavitud, Santa Fe la Vieja, cronología Daily use artifacts represented in the Arroyo de Leyes pottery collection: their use in the determination of chronology Abstract The presence of daily-use artifacts (implements for mate infusion, a money box, a horn cup and a “basket” used for the duck game represented in the ceramic collection of Los Zapallos site, Arroyo Leyes (Garay Department, Santa Fe Province, Argentina is analyzed. In this paper different elements are described, placed in a context considered in prima facie as resulting from the labor of enslaved individuals belonging to neighbors of Santa Fe la Vieja (XVIIth century, but that also may contain materials corresponding to contemporary or pre-conquest native cultures, to XVIII-XIXth centuries, and to “falsifications” of the early XXth century. On the basis of paste and piece decoration, and of argumental consistency derived from written documents, an attempt to place each element on the time scale is made. Keywords: Arroyo Leyes, archaeology of slavery, Santa Fe la Vieja, chronology

  6. Accretion of Cometary Nuclei in the Solar Nebula: Boulders, Not Pebbles

    Science.gov (United States)

    Weissman, Paul R.; A'Hearn, Michael

    2015-11-01

    Comets are the most primitive bodies in the solar system. They retain a largely unprocessed record of conditions in the primordial solar nebula 4.56 Gyr ago, including the initial accretion of dust and ice particles into macroscopic bodies. Current accretion theory suggests that ice and dust aggregates grew to pebble (cm) sizes before streaming instabilities and gravitational collapse brought these pebble swarms together as km-sized (or larger) bodies. Recent imaging of the nucleus of comet 67P/Churyumov-Gerasimenko by the Rosetta OSIRIS camera team has revealed the existence of “goose bump” terrain on the nucleus surface and lining the interior walls of large, ~200 m diameter and 180 m deep cylindrical pits. These pits are believed to be sinkholes, formed when near-surface materials collapse into voids within the nucleus, revealing the fresh comet interior on the walls of the pits. The goose bump terrain consists of 3-4 m diameter “boulders” randomly stacked one on top of another. We propose that these boulders, likely with an icy-conglomerate composition, are the basic building blocks of cometary nuclei. This is the first observational confirmation of current accretion theories, with the caveat that rather than pebbles, the preferred size range is 3-4 m boulders for objects formed in the giant planets region of the solar system. The presence of icy grains beyond the solar nebula snow-line and the large heliocentric range of the giant planets region likely contribute to the formation of these larger boulders, before they are incorporated into cometary nuclei. This work was supported by NASA through the U.S. Rosetta Project.

  7. Astronaut John Young looks over a boulder at Station no. 13 during EVA

    Science.gov (United States)

    1972-01-01

    Astronaut John W. Young, commander of the Apollo 16 lunar landing mission, looks over a large boulder at Station No. 13 during the third Apollo 16 extravehicular activity (EVA-3) at the Descartes landing site. This was the site of the permanently shadowed soil sample which was taken from a hole extending under overhanging rock. Astronaut Charles M. Duke Jr., lunar module pilot, took this photograph. Concerning Young's reaching under the big rock, Duke remarked: 'You do that in west Texas and you get a rattlesnake!'

  8. A story about estimation of a random field of boulders from incomplete seismic measurements

    DEFF Research Database (Denmark)

    Ditlevsen, Ove Dalager

    2005-01-01

    Belt. The surprisingly simple results from the analysis of the data from this separate measuring program are reported in a companion paper. Based on the revealed geographical universality of the joint dimension distribution it is anticipated that the same distribution is applicable for the till...... deposits along the tunnel line. By use of this important distribution information and of the observed homogeneity of the seismic point source field together with the physical properties of diffraction it became possible to make the wanted prediction. During the excavation the found boulders were counted...

  9. Geología y registros magnéticos entre arroyo La Tapera y Santa Clara del Mar, Mar del Plata

    Directory of Open Access Journals (Sweden)

    J.C. Bidegain

    2005-09-01

    Full Text Available Estudios paleomagnéticos se realizaron en secuencias del Pleistoceno-Holoceno del sector comprendido entre el arroyo La Tapera y Santa Clara del Mar, en Mar del Plata. Los sedimentos de la base de los perfiles en el arroyo La Tapera y en Camet, que se interpreta pertenecen a la Formación Ensenada, contienen direcciones de polaridad reversa y se asignan al cron Matuyama. Las capas sedimentarias de la base del perfil de Santa Clara del Mar, solo presentan direcciones de polaridad normal, por consiguiente toda la secuencia sedimentaria de esta localidad se asigna al cron Brunhes, (< 0,78 Ma. Los registros de susceptibilidad magnética siguen el patrón de los perfiles realizados en el plateau de loess de Argentina. Los valores más bajos de susceptibilidad corresponden a mayor grado de pedogénesis y meteorización más intensa. Las titanomagnetitas acarreadas por el viento en los períodos glaciares (más secos, son las portadoras principales de la remanencia y responden por los registros magnéticos más elevados que se obtienen en las capas menos meteorizadas.

  10. Distribución de tierras raras en soluciones y coloides de un sistema natural de aguas ácidas (Arroyo del Val, Zaragoza

    Directory of Open Access Journals (Sweden)

    López Julián, P. L.

    1993-04-01

    Full Text Available Acidic waters of the «Arroyo del Val» stream are naturally generated by oxidation of sulfide minerals dispersed in the sedimentary materials of the drainage basin. Mixing of this acidic stream with neutral-alkaline tributaries yields spectacular iron and aluminium rich flocculants that precipitate at the confluences. Previous analysis of rare earth element (REE concentrations of sorne 0.1 I-tm-filtered water samples and colloids are shown. The shale-normalized REE patterns of acidic waters show significant HREE enrichments in terms of Lun/Lan (≈ 2 and they are tipically enriched in the intermediate REEs (IREEs, Eu-Gd-Tb. So, in detail, these patterns are characterized by HREE enrichments between La and Gd and HREE depletions between Gd and Lu. The REE contents of two colloid samples are enriched by 103_104 relative to acidic waterso Different REE patterns were found in these colloids, sampled at differents distances from head of Arroyo del Val stream. Colloid sampled between the acidic waters analysed (CV-l shows a very similar REE pattern to those of the waters. The REE composition normalized to shale of second colloid sample (CV-2, collected down stream, has a flatter profile although it is still slightly convexo Significant REE removal (about 50 % caused by colloid coagulation is observed at the confluence and mixing point of the Arroyo del Val acidic waters with the first alkaline tributary. At this point the CV-l colloid sample shows HREE enrichment relative to acidic waters.El Arroyo del Val (provincia de Zaragoza constituye un curso de aguas ácidas de origen natural, generadas por el lavado de los materiales paleozoicos que atraviesa (Formación Bádenas, ricos en sulfuros metálicos dispersos. En los puntos de confluencia de este arroyo con afluentes de aguas neutras-alcalinas se producen espectaculares procesos de floculación de coloides ricos en aluminio y hierro que tapizan el fondo del arroyo. En este trabajo se

  11. Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará - Colombia): Implications for the Magdalena River - paleodelta’s dynamic

    Science.gov (United States)

    Molinares, C. E.; Martinez, J. I.; Fiorini, F.; Escobar, J.; Jaramillo, C.

    2012-11-01

    The Magdalena river transports one of the largest load of sediments per basin area in the world. Its delta position has changed several times over the Neogene. The Arroyo Piedras Section (169 m) in northern Colombia, contains part of the record of the Late Miocene to Early Pliocene evolution of the Magdalena paleodelta. The section was described and sampled for sedimentological and micropaleontological analyses. Based on lithofacies and benthic foraminifera content, the section was divided in three segments, and the upper segment was dated as Early Pliocene using planktonic foraminifera. The lower segment suggests siliciclastic sedimentation in a proximal prodelta/delta plain transitional environment. The intermediate segment suggests sedimentation in a lagoon and/or coastal swamp environment, whereas the upper segment is interpreted as the result of a transgression and subsequent deposition at the foreshore/upper shoreface environment, with a considerable decrease of terrigenous input. The decrease of sediment delivery to the delta produced by permanent El Niño-like conditions coupled with autocyclic processes could explain the transgressive pattern observed in the Arroyo de Piedras section during the Early Pliocene.

  12. Quantitative Morphologic Analysis of Boulder Shape and Surface Texture to Infer Environmental History: A Case Study of Rock Breakdown at the Ephrata Fan, Channeled Scabland, Washington

    Science.gov (United States)

    Ehlmann, Bethany L.; Viles, Heather A.; Bourke, Mary C.

    2008-01-01

    Boulder morphology reflects both lithology and climate and is dictated by the combined effects of erosion, transport, and weathering. At present, morphologic information at the boulder scale is underutilized as a recorder of environmental processes, partly because of the lack of a systematic quantitative parameter set for reporting and comparing data sets. We develop such a parameter set, incorporating a range of measures of boulder form and surface texture. We use standard shape metrics measured in the field and fractal and morphometric classification methods borrowed from landscape analysis and applied to laser-scanned molds. The parameter set was pilot tested on three populations of basalt boulders with distinct breakdown histories in the Channeled Scabland, Washington: (1) basalt outcrop talus; (2) flood-transported boulders recently excavated from a quarry; and (3) flood-transported boulders, extensively weathered in situ on the Ephrata Fan surface. Size and shape data were found to distinguish between flood-transported and untransported boulders. Size and edge angles (approximately 120 degrees) of flood-transported boulders suggest removal by preferential fracturing along preexisting columnar joints, and curvature data indicate rounding relative to outcrop boulders. Surface textural data show that boulders which have been exposed at the surface are significantly rougher than those buried by fan sediments. Past signatures diagnostic of flood transport still persist on surface boulders, despite ongoing overprinting by processes in the present breakdown environment through roughening and fracturing in situ. Further use of this quantitative boulder parameter set at other terrestrial and planetary sites will aid in cataloging and understanding morphologic signatures of environmental processes.

  13. Predicted Versus Actual Savings for a Low-Rise Multifamily Retrofit in Boulder, Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Arena, L. [Consortium for Advanced Residential Buildings (CARB), Norwalk, CT (United States); Williamson, J. [Consortium for Advanced Residential Buildings (CARB), Norwalk, CT (United States)

    2013-11-01

    To determine the most cost-effective methods of improving buildings, accurate analysis and prediction of the energy use of existing buildings is essential. However, multiple studies confirm that analysis methods tend to over-predict energy use in poorly insulated, leaky homes and thus, the savings associated with improving those homes. In this project, the Building America CARB team evaluated the retrofit of a multifamily building in Boulder, CO. The updated property is a 37 unit, 2 story apartment complex built in 1950, which underwent renovations in early 2009 to bring it into compliance with Boulder, CO's SmartRegs ordinance. Goals of the study were to: 1) evaluate predicted versus actual savings due to the improvements, 2) identify areas where the modeling assumptions may need to be changed, and 3) determine common changes made by renters that would negatively impact energy savings. Other issues that were investigated include the effects of improving building efficiency on tenant comfort, the impact on tenant turnover rates, and the potential market barriers for this type of community scale project.

  14. Modelo matemático para determinar la calidad del agua en dos puntos del arroyo Guachinango

    Directory of Open Access Journals (Sweden)

    Jeny Pérez Petitón

    2009-01-01

    Full Text Available El trabajo tuvo como objetivo analizar la posible relación de los indicadores físico químicos pH y CE, de fácil determinación, con los indicadores microbiológicos Demanda Bioquímica de Oxígeno (DBO5, Demanda Química de Oxígeno (DQO y Coliformes Totales (CT. Se tuvieron en cuenta los resultados obtenidos en la caracterización física, química y microbiológica de la subcuenca en estudio. Teniendo en cuenta los mismos se seleccionaron dos puntos de muestreos ubicados en la presa Hemingway I, donde nace el arroyo y el otro en la toma de agua de la finca la Conchita, donde se realizan todos los experimentos de campo. Con los datos obtenidos se determinó la correlación que existe entre los parámetros físicos químicos y los análisis microbiológicos realizados, así como los modelos matemáticos correspondientes. El comportamiento de los indicadores físicos químicos está entre los rangos permisibles para el uso de esta agua en el riego. Los indicadores microbiológicos muestran que hay alta contaminación por microorganismos patógenos, lo cual significa que estas aguas no pueden ser utilizadas en el riego sin tratamiento previo. Existe correlación positiva entre el pH con la DBO5 y DQO, así como entre la conductividad eléctrica y los coniformes totales, existiendo una correlación mas significativa para el punto de muestreo en la presa Hemingway I, por lo que los modelos definidos en este trabajo permiten estimar para los puntos de muestreo estudiados el comportamiento de los parámetros de DBO5, DQO y CT a partir de la medición de los parámetros físico-químico pH y CE de fácil determinación.

  15. Geochemical studies of the White Breccia Boulders at North Ray Crater, Descartes region of the lunar highlands

    Science.gov (United States)

    Lindstrom, M. M.; Lindstrom, D. J.; Lum, R. K. L.; Schuhmann, P. J.; Nava, D. F.; Schuhmann, S.; Philpotts, J. A.; Winzer, S. R.

    1977-01-01

    The samples of the White Breccia Boulders obtained during the Apollo 16 mission and investigated in the reported study include an anorthositic breccia (67415), a dark matrix breccia (67435), a light matrix breccia (67455), and a large clast of dark matrix breccia (67475) taken from the 67455 boulder. The chemical analyses of bulk samples of the samples are listed in a table. A graph shows the lithophile trace element abundances. Another graph indicates the variation of Sm with Al2O3 content for samples from the White Breccia Boulders. The North Ray Crater breccias are found to be in general slightly more aluminous than breccias from the other stations at the Apollo 16 site. Analyses of eight Apollo 16 breccias cited in the literature range from 25% to 35% Al2O3. However, the North Ray Crater breccias are more clearly distinct from the other Apollo 16 breccias in their contents of lithophile trace elements.

  16. Assessment of the Effect of Blast Hole Diameter on the Number of Oversize Boulders Using ANN Model

    Science.gov (United States)

    Dhekne, Prakash; Pradhan, Manoj; Jade, Ravi Krishnarao

    2016-04-01

    Now-a-days, blasts are planned using large diameter blast holes. The loading density (kg/m) and subsequently the energy available for the breakage of the rockmass increase with the diameter. The in-hole velocity of detonation (VoD) of non-ideal explosive also boosts up with the increase in diameter till the optimum diameter is reached. The increase in the energy content and in-hole VoD cause a sizable effect on the rock fragmentation. The effect can be assessed by counting the number of oversize boulders. This paper explains as to how the technique of artificial neural network modeling was used to predict the number of oversize boulders resulting from ANFO and SME blasts with blast holes of different diameters. The results from ANFO blasts indicated that there was no significant variation in the number of oversize boulders with the diameter whereas a perceptible variation was noticed in case of SME blasts with the change in the diameter. The change in the number of oversize boulders in ANFO blasts was negligible because mean energy factor remained almost same even when the diameter of the blast holes was altered. The decrease in the number of oversize boulders in SME blasts was on account of increase in mean energy factor when the blast hole diameter was increased. The increase in the in-hole VoD due to increase in the diameter of the hole was not found to have an effect on the generation of oversize boulders as this increase was not substantial both in SME and ANFO blasts.

  17. Especiación de tierras raras en las soluciones ácidas y neutras del sistema de drenaje del Arroyo del Val (Zaragoza

    Directory of Open Access Journals (Sweden)

    Zamora, A.

    1994-08-01

    Full Text Available Special geochemical characters of the Arroyo del Val drainage basin allow to study different aspects related to REE behaviour. The hydrologic system contains a main stream (Arroyo del Val of acidic waters naturally generated (sulfate rich solutions, with high levels of Al, Fe and heavy metals, and with pH values between 3 and 4.5 and several calcium bicarbonate (sulfate tributaries (with pH values as high as 7.5, measurable alkalinity and striking phosphate concentrations. Mixing of the acidic stream with neutral tributaries yields spectacular sulfate-iron-aluminum rich flocculants that precipitate at the confluences, along the principal stream. The concentration of REEs was measured for acidic water samples col1ected along the headwaters zone of the Arroyo del Val stream and for neutral water samples fram two tributaries. The REE content of acidic waters are enriched by 102 relative to neutral ones and the shale-normalized REE patterns for these acidic freshwaters are enriched in the inter• mediate REEs (IREE, Eu-Tb. Speciation calculations were performed on both water groups. Dominant forms of REEs in the acidic waters include free metal species (Ln3+ ≈ 35% and mainly sulfate complexes ((LnSO+4 ≈ 60% and minor Ln(SO4-2 ≈ 5%. REE sulfate complexation don't fractionate the REEs in solution because there is not an appreciable variation in REE sulfate complexation constants across the lanthanide serie. So, REE convex patterns in these acidic waters must be related to interaction of the acid waters with clay minerals and oxyhydroxide coatings in the paleozoic materials of drainage basin and/or with the col1oid pool of those waters. In the neutral freshwaters of tributaries dissolved REEs are complexed with carbonate and phosphate ions. REE carbonate and phosphate complexation constants across the lanthanide serie increase by several orders of magnitude from La to Lu. And so, phosphate and carbonate complexes account for 80

  18. Survival times of meter-sized rock boulders on the surface of airless bodies

    Science.gov (United States)

    Basilevsky, A. T.; Head, J. W.; Horz, F.; Ramsley, K.

    2015-11-01

    Rock boulders are typical features of the surfaces of many airless bodies, so the possibility of estimating their potential survival times may provide insights into the rates of surface-modification processes. As an opening point of this study we employ estimates of the survival times of meter-sized boulders on the surface of the Moon based on analysis of the spatial density of boulders on the rims of small lunar craters of known absolute age (Basilevsky et al., 2013), and apply them, with necessary corrections, to boulders on other bodies. In this approach the major factor of rock destruction is considered to be impacts of meteorites. However another factor of the rock destruction, thermal fatigue due to day-night cycling, does exist and it was claimed by Delbo et al. (2014) as being more important than meteorite impacts. They concluded this on the basis of known presence of fine material on the surface of small asteroids, claiming that due to extremely low gravity on those bodies, the products of meteorite bombardment should leave these bodies, and thus their presence indicates that the process of thermal fatigue should be much more effective there. Delbo et al. (2014) made laboratory experiments on heating-cooling centimeter-sized samples of chondrites and, applying some assumptions and theoretical modeling concluded that, for example, at 1 AU distance from the Sun, the lifetime of 10 cm rock fragments on asteroids with period of rotation from 2.2 to 6 h should be only ~103 to 104 years (that is ~3.5×106 to 1.5×107 thermal cycles) and the larger the rock, the faster it should be destroyed. In response to those conclusions we assessed the results of earlier laboratory experiments, which show that only a part of comminuted material produced by high-velocity impacts into solid rocks is ejected from the crater while another part is not ejected but stays exposed on the target surface and is present in its subsurface. This means that the presence of

  19. Texturas, argilominerales y metales en sedimentos de fondo de arroyos de la franja costera sur del Río de la Plata

    Directory of Open Access Journals (Sweden)

    Marcelo Manassero

    2010-08-01

    Full Text Available Se estudiaron sedimentos de fondo extraídos en posiciones distales de los arroyos El Pescado, Cañada Arregui, Buriñigo, Juan Blanco, El Destino, Samborombón y Salado, estos dos últimos ubicados en la región más abierta del estuario del río de la Plata. Para la caracterización granulométrica (tamizado y pipeteo, mineralogía de arcillas (difracción rayos X, contenido de materia orgánica (digestión ácida en caliente, valoración titulométrica y concentración de metales (espectrometría AA, se emplearon métodos estandarizados de laboratorio. La mayoría de los sedimentos fueron clasificados como limos arcillosos y arcillas limosas, sin embargo en el río Salado y los arroyos El Pescado y El Destino los sedimentos de fondo son más arenosos. La composición mineralógica de las arcillas indica que los sedimentos de los arroyos cuentan con una importante proporción de esmectita y caolinita, aunque manteniéndose una predominancia illítica. Significativamente, mayor proporción de caolinita está presente en los ríos Samborombón y Salado, evidenciando una importante influencia estuárica. El hierro y el manganeso son los metales mayoritarios con mayor variabilidad entre cursos. Los humedales costeros y zonas deprimidas de la costa del estuario favorecen la retención de estos dos elementos. Las altas variaciones de los contenidos reflejan diferencias fisicoquímicas en los ambientes depositacionales. El orden de abundancia del resto de los metales analizados es Zn>Pb=Cu>Cr> Ni>Cd, con concentraciones más elevadas en los de la vertiente sur del estuario, manteniendo un comportamiento similar al de los mayoritarios.

  20. Mineralogical, IR-spectral and geochemical monitoring of hydrothermal alteration in a deformed and metamorphosed Jurassic VMS deposit at Arroyo Rojo, Tierra del Fuego, Argentina

    Science.gov (United States)

    Biel, C.; Subías, I.; Acevedo, R. D.; Yusta, I.; Velasco, F.

    2012-04-01

    The Arroyo Rojo Zn-Pb-Cu volcanogenic massive sulfide deposit is the main deposit of the Fin del Mundo District in the Fuegian Andes, Argentina. This deposit is hosted by a Middle Jurassic volcanic and volcanoclastic sequence forming the Lemaire Formation. The latter consists, from the base up, of the following: rhyolitic and dacitic porphyritic rocks, ignimbrite, tuff, and flow. It is underlain by a pre-Jurassic basement and overlain by the hyaloclastic andesites of the Yahgán Formation. The Arroyo Rojo consists of stacked lenticular lenses that are associated with disseminated mineralization in both the footwall and the hanging wall. The internal structure of the ore lenses is marked by the occurrence of massive, semi-massive and banded facies, along with stringer and brecciated zones and minor ore disseminations. The mineral assemblage comprises mainly pyrite and sphalerite, with minor amounts of galena and chalcopyrite and rare pyrrhotite, arsenopyrite, tetrahedrite and bournonite. The ores and the volcanic host rocks have metamorphosed to greenschist facies and were overprinted by a penetrative tectonic foliation, which led to the development of mylonitic, and cataclastic textures, recrystallization and remobilization. Primary depositional characteristics and regional and hydrothermal alteration patterns were preserved despite deformation and metamorphism. Therefore, primary banding was preserved between facies boundaries. In addition, some remnants of magmatic origin are recognizable in preserved phenocrysts and volcaniclastic phenoclasts. Most of the volcanic and volcaniclastic rocks of the host sequence show a rhyolitic to rhyo-dacitic composition. Regional seafloor alteration, characterized by the presence of clinozoisite, Fe-chlorite and titanite, along with quartz and albite, is partially obliterated by hydrothermal alteration. The hydrothermal alteration is stratabound with the following assemblages, which developed from the base to top: (1) Quartz

  1. Boulder Moves Ahead: An Evaluation of the English as a Second Language Tutorial Program of the Boulder Valley Public Schools, During Its First Year of Operation: 1975-76.

    Science.gov (United States)

    Stansfield, Charles

    The evaluation of the first year of the English as a Second Language Tutorial Program of Boulder Valley Public Schools included on-site observations, interviews with coordinators and teachers, a linguistic evaluation of each student (elementary and secondary levels), a classroom teacher's questionnaire, a parents' questionnaire, and a tutor's…

  2. Integrated mined-area reclamation and land use planning. Volume 3A. A case study of surface mining and reclamation planning: South Boulder Creek Park Project, Sand and Gravel Operations, Boulder, Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Lewis, L R; Perry, A O; LaFevers, J R

    1977-02-01

    This case study details reclamation planning for the Flatiron Companies' South Boulder Creek Park Project in Boulder, Colorado. The site contains a deposit of high-quality sand and gravel considered to be one of the best and largest known deposits of aggregate materials in the Front Range area. The aggregate deposit is located in a highly visible site just off the Denver-Boulder Turnpike at the entrance to the city from Denver, and adjacent to a residential portion of the city. In order to make maximum use of pre-mining planning, as a tool for resolving a conflict over the company's proposed operation, an extensive cooperative planning effort was initiated. This included the preparation of an environmental impact assessment, numerous public hearings, operating and reclamation plan review by city authorities, annexation of the site to the city, and the granting of a scenic easement on the property to the city for the development of a regional recreation park. A suite of contractual agreements was worked out among Flatiron Companies, the City of Boulder, the Colorado Open Lands Foundation, and the Federal Bureau of Outdoor Recreation. The purpose of this case study is to allow the planner to gain insight into the procedures, possibilities, and constraints involved in premining planning in a cooperative situation.

  3. A successful borehole drilled by cryogenic drilling in an arid, unconsolidated soil with boulders

    Energy Technology Data Exchange (ETDEWEB)

    Cavagnaro, P.; Simon, R.D.; Cooper, G.A. [Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering

    1997-07-01

    An 80 foot deep borehole was drilled using a novel cryogenic drilling method. The freeze while drilling technique stabilizes the borehole wall while drilling by using conventional air rotary methods but with low temperature nitrogen gas (as cold as {minus}196 C) as the drilling fluid. The location of the field test was a semi-arid alluvial unconsolidated sedimentary formation at the Aerojet, Inc. site in Rancho Cordova, California. The geology was a sandy soil matrix containing cobbles and boulders. The test goal was to drill to 100 feet (30 m), but the test was terminated at 80 feet due to a failure of the swivel shaft and drill bit resulting from the very rough drilling conditions. No safety, technical, or operational problems were encountered that could prevent cryogenic drilling from becoming a standard technique for drilling in unstable near-surface formations.

  4. Boulder Deposits on the Southern Spanish Atlantic Coast: Possible Evidence for the 1755 AD Lisbon Tsunami?

    Directory of Open Access Journals (Sweden)

    Dieter Kelletat

    2005-01-01

    Full Text Available Field evidence of visible tsunami impacts in Europe is scarce. This research focused on an analysis of large littoral debris and accompanying geomorphic features and their rela- tionship to a tsunami event at Cabo de Trafalgar, located on the southern Spanish Atlantic coast. Relative dating of weathering features as well as minor bioconstructive forms in the littoral zone suggest the Lisbon tsunami of 1755 AD as the event responsible for the large deposits described. This tsunami had run up heights of more than 19 m and was generated at the Gorringe Bank, located 500 km west off the Cape. Tsunami deposits at Cabo de Tra- falgar are the first boulder deposits identified on the southern Spanish Atlantic coast and are located approximately 250 km southeast of the Algarve coast (Portugal, where other geo- morphic evidence for the Lisbon tsunami has been reported.

  5. ATS6 radio beacon electron content measurements at Boulder, July 1974--May 1975

    International Nuclear Information System (INIS)

    Routine monitoring of the plasmaspheric content was a primary objective of the ATS6 Radio Beacon Experiment (RBE) and this set critical requirements on transmitter and receiver stabilities. The satellite transmitted linearly polarized signals on carrier frequencies of 40.016, 140.056, and 360.144 MHz, with modulations of 100.04 kHz and 1.004 MHz. This provided coarse and fine scales of measurements so that the cycle ambiguity in the phase measurements of both Faraday rotation and group delay could be resolved. This report summarizes 140 MHz data recorded at the Boulder, Colorado, ground station (40.13 degrees N, 105.24 degrees W) while ATS6 was positioned above 94 degrees west longitude, between July 1974 and May 1975. The satellite appeared at an azimuth of 163 degrees, elevation 42 degrees, with the projection of the ray path near the ground. All data were digitally recorded once per second

  6. Taxonomic and behavioral components of faunal comparisons over time: The bees of Boulder County past and present (Colorado, USA) (Hymenoptera: Anthophila)

    Science.gov (United States)

    Historical and recent studies of Boulder County, Colorado (USA) bees (Hymenoptera: Anthophila) illustrate the potential and the pitfalls of using comparative collection data to evaluate faunal composition and change over time. A compilation of bee records from Boulder Co., CO (USA) (Scott et al., 2...

  7. Predicted Versus Actual Savings for a Low-Rise Multifamily Retrofit in Boulder, Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Arena, L.; Williamson, J.

    2013-11-01

    To determine the most cost-effective methods of improving buildings, accurate analysis and prediction of the energy use of existing buildings is essential. However, multiple studies confirm that analysis methods tend to over-predict energy use in poorly insulated, leaky homes and thus, the savings associated with improving those homes. In NREL's report titled 'Assessing and Improving the Accuracy of Energy Analysis of Residential Buildings,' researchers propose a method for improving the accuracy of residential energy analysis methods. A key step in this process involves the comparisons of predicted versus metered energy use and savings. In support of this research need, CARB evaluated the retrofit of a multifamily building in Boulder, CO. The updated property is a 37 unit, 2 story apartment complex built in 1950, which underwent renovations in early 2009 to bring it into compliance with Boulder, CO's SmartRegs ordinance. Goals of the study were to: 1) evaluate predicted versus actual savings due to the improvements, 2) identify areas where the modeling assumptions may need to be changed, and 3) determine common changes made by renters that would negatively impact energy savings. In this study, CARB seeks to improve the accuracy of modeling software while assessing retrofit measures to specifically determine which are most effective for large multifamily complexes in the cold climate region. Other issues that were investigated include the effects of improving building efficiency on tenant comfort, the impact on tenant turnover rates, and the potential market barriers for this type of community scale project.

  8. Multi-method attribution analysis of extreme precipitation in Boulder, Colorado

    Science.gov (United States)

    Eden, Jonathan; van Oldenborgh, Geert Jan; Otto, Friederike

    2016-04-01

    Understanding and attributing the characteristics of extreme events that lead to societal impacts is a key challenge in climate science. Detailed analysis of individual case studies is particularly important in assessing how anthropogenic climate change is changing the likelihood of extreme events and their associated risk at relevant spatial scales. While climate model simulations provide an important basis for such analysis, reliable assessment of long term changes in extreme events is limited by models' inherent errors and biases. Here, we conduct a comprehensive multi-method attribution analysis of the heavy precipitation that led to widespread flooding in Boulder, Colorado in September 2013. Using extreme value analysis of, first of all, historical observations, we assess the influence of anthropogenic climate change on the likelihood of one- and five-day precipitation events across the Boulder area. The same analysis is extended to the output of a 16-member coupled model ensemble, following rigorous evaluation of the model skill in representing the processes responsible for extreme precipitation events in this region. Preliminary analysis using both observation- and model-based methods suggests that an event of this magnitude is around 20% more likely as a result of anthropogenic climate change. Recently, emphasis has been placed on the importance of model evaluation and bias correction in attribution studies. Further analysis will thus focus on sophisticated bias correction and downscaling techniques and their potential added value for application in attribution analysis. We also highlight the benefit of a multi-method approach in addressing event-specific attribution questions, particularly with regard to the quantification of uncertainty.

  9. Comportamiento hidrológico de la Cuenca Alta del Arroyo Pigüé (Buenos Aires, Argentina): balance hídrico (1964-2007)

    OpenAIRE

    Rosell, Patricia; García Martínez, María Belén

    2008-01-01

    En este trabajo se aborda el estudio hidrológico de la cuenca alta del Arroyo Pigüé, a través del estudio de la serie de precipitaciones y el balance hídrico del suelo de la cuenca. Desde un punto de vista climático, se constata la existencia de un ciclo húmedo en la región, a partir de la década de los setenta, que se traduce, a nivel hidrológico en una progresiva sobresaturación de los suelos, con fuertes descargas en dirección a la red de drenaje del Pigüé. Ésta, parcialmente desconectada ...

  10. Cuatro figuras de la música colombiana: Jairo Varela, Diomedes Díaz, Joe Arroyo y Carlos Vives, sus opciones musicales y los debates que sugieren

    Directory of Open Access Journals (Sweden)

    Petrit Baquero

    2015-09-01

     En  ese sentido,  la música  popular puede  constituir la mejor  forma  de  expresar las realidades, vivencias,  los sueños,  las esperanzas y alternativas de vida, con lo cual, los criterios  que impone  la industria cultural  pueden también ser permeados desde abajo por esos localismos que irrumpen de manera permanente. Jairo Varela, Diomedes Díaz, Joe Arroyo y Carlos Vives representan a grandes artistas que, a su manera, transformaron la música colombiana al impulsar  distintos procesos  cuyos efectos se siguen viendo día a día.

  11. 33 CFR 165.T11-281 - Safety Zone; Lake Mead Intake Construction; Lake Mead, Boulder City, NV.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Safety Zone; Lake Mead Intake Construction; Lake Mead, Boulder City, NV. 165.T11-281 Section 165.T11-281 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PORTS AND WATERWAYS SAFETY REGULATED NAVIGATION AREAS AND LIMITED ACCESS AREAS...

  12. A Case Study on Environmental Perspectives of Boulderers and Access Issues at the Niagara Glen Nature Reserve

    Science.gov (United States)

    Thompson, Jeremy; Davidson, Justin; Hutson, Garrett

    2008-01-01

    Currently, there are concerns about access restrictions to bouldering, a form of rock climbing, and other outdoor activities practiced at the Niagara Glen Nature Reserve located near Niagara Falls, Ontario, Canada. The Niagara Parks Commission is currently in the process of exploring ways to balance protection of the natural area with sustainable…

  13. Expanded Systematic Prospection To Discover The Original Of Uranium Mineral Boulders In Sector II Tanah Merah Kalimantan

    International Nuclear Information System (INIS)

    Result of the previous prospections at Tanah Merah area by CEA-BATAN (1977) and by Djawadi et al (1990) has found the existence of U-bearing monazite boulders, those being found in the intercalation between quarzite and metasilt area. This current systematic prospection is done based on the data of the previous prospection above and intends to get knowledge about the origin of those boulders. This research consists of topographic mapping, emanometric radiometric, and structural element measurements. The results show that the area is located on the NW flank of subhorizontal NE-SW synform which is cut by strike slip faults in various direction, as a dextral sinistral tear faults, and NE-SW normal faults with SE block downthrown. Emanometric and radio-metric anomalous zones and the dispersion of the boulders area parallel and follow the WNW - ESE fractures Zones. Finally, it can be concluded that U-bearing monazite boulders come from veins in the WNW-ESE fractures

  14. Increasing the Harvest: How the University of Colorado Boulder Replaced Alumni Association Dues with a Student Fee

    Science.gov (United States)

    Peglar, Tori

    2012-01-01

    In 2007 the University of Colorado Boulder Alumni Association moved under the university's umbrella after the alumni members had spent 11 years under the CU Foundation. But there were two major catches. First, the chancellor wanted them to eliminate their membership dues, as he felt they competed with the annual fund. Second, he could only make up…

  15. Los depositos de yeso intrasedimentario del arroyo El Siasgo, partidos de Monte y General Paz, provincia de Buenos Aires

    Directory of Open Access Journals (Sweden)

    N. V. Dangavs

    2002-09-01

    Full Text Available El arroyo El Siasgo es un afluente del río Salado, situado en la región NE de la provincia de Buenos Aires. En su cuenca inferior, su curso recorta una gran depresión, remanente de una antigua cuenca de deflación colmatada, donde se desarrollaron, desde el Pleistoceno superior, diversos ambientes sedimentarios, principalmente acuáticos. Actualmente, se desarrolla, en esta depresión, un ambiente léntico temporario de 2.750 ha, dividido en dos cuerpos mediante un estrechamiento de la cubeta de 2 km de largo y 0,7 km de ancho. Al norte del estrechamiento se sitúa el cuerpo menor, denominado "La Cañada" y hacia el sur el mayor o "laguna del Siasgo". En los sedimentos clásticos hospedantes de este paleoambiente léntico múltiple aparece una importante acumulación de yeso intrasedimentario en distintos niveles estratigráficos (Formaciones Lobos, Luján y La Postrera I, cristalizado principalmente en tamaño arena, con diversidad de hábitos, texturas, fábricas y estructuras. Los sedimentos hospedantes del yeso son esencialmente fangos, cuya textura original se encuentra modificada por la presencia del mineral epigénico en fangos y limos arenosos e incluso en arenas fangosas. Este depósito yesífero abarca una superficie de 25,6 km², con un espesor medio de 2,15 m en el subambiente "del Siasgo" y de 0,91 m en "La Cañada". El volumen de sedimentos con yeso alcanza a 48 hm³ y la ley mineral mínima es 53,5% en la "laguna del Siasgo", con un total de 53.623.000 de toneladas de yeso impuro, mientras que en "La Cañada, con una ley media de 20,1 %, solamente alcanza a 1.361.000 toneladas de yeso impuro. Cabe señalar, que la baja ley del mineral en "La Cañada" descarta su aprovechamiento como recurso económico, mientras que el yeso presente en el subambiente "del Siasgo" es de alta potencialidad para su explotación, incluso en su valor mínimo. Estos yesos son el producto de la interacción de aguas superficiales y subterr

  16. Boulder aprons indicate long-term gradual and non-catastrophic evolution of cliffed escarpments, Stołowe Mts, Poland

    Science.gov (United States)

    Duszyński, Filip; Migoń, Piotr

    2015-12-01

    Caprock-crowned escarpments are characteristic geomorphic features of the sandstone tableland of the Stołowe Mountains (SW Poland). Their mid- and lower slopes truncate weaker sedimentary formations but are littered with sandstone boulders of various size, often more than 5 m long, which form nearly continuous aprons. A model of escarpment retreat by rock fall has been widely accepted in literature but in the Stołowe Mountains it has never been tested against field evidence; in addition no rock fall events except one minor fall in 1921 have been recorded in historical times. In this paper we erected five hypotheses of how escarpments may have evolved through time to result in widespread boulder presence on the slopes. Mapping boulder extent and slope morphology, run-out distance simulations using Conefall software, and rock strength determinations using the Schmidt hammer carried out on boulders along eight representative slope profiles provide data about characteristics of the boulder covers. Systematic decrease in intact rock strength with an increasing distance from the sandstone cliffs suggests that the boulder aprons are diachronic and record long-term retreat of escarpments. There exists no conclusive evidence of widespread boulder downslope movement, although in a few localities shallow landslides have rafted boulders far away from the cliff lines. Modelling exercise shows that the actual extent of boulders is 2-3 times bigger than suggested by Conefall predictions. These findings, coupled with observations along the cliff lines themselves, lead us to propose a model of free face in situ disintegration as the most likely hypothesis to explain block detachment and release from rock faces. As cliff lines recede and the slope surface below is lowered, remnant boulders occupy a position increasingly further away from escarpment rims, but experience little actual movement. This model complements the existing models of tableland evolution which tend to emphasize

  17. NASA's Asteroid Redirect Mission: A Robotic Boulder Capture Option for Science, Human Exploration, Resource Utilization, and Planetary Defense

    Science.gov (United States)

    Abell, P.; Nuth, J.; Mazanek, D.; Merrill, R.; Reeves, D.; Naasz, B.

    2014-01-01

    NASA is examining two options for the Asteroid Redirect Mission (ARM), which will return asteroid material to a Lunar Distant Retrograde Orbit (LDRO) using a robotic solar electric propulsion spacecraft, called the Asteroid Redirect Vehicle (ARV). Once the ARV places the asteroid material into the LDRO, a piloted mission will rendezvous and dock with the ARV. After docking, astronauts will conduct two extravehicular activities (EVAs) to inspect and sample the asteroid material before returning to Earth. One option involves capturing an entire small (4 - 10 m diameter) near-Earth asteroid (NEA) inside a large inflatable bag. However, NASA is also examining another option that entails retrieving a boulder (1 - 5 m) via robotic manipulators from the surface of a larger (100+ m) pre-characterized NEA. The Robotic Boulder Capture (RBC) option can leverage robotic mission data to help ensure success by targeting previously (or soon to be) well- characterized NEAs. For example, the data from the Japan Aerospace Exploration Agency's (JAXA) Hayabusa mission has been utilized to develop detailed mission designs that assess options and risks associated with proximity and surface operations. Hayabusa's target NEA, Itokawa, has been identified as a valid target and is known to possess hundreds of appropriately sized boulders on its surface. Further robotic characterization of additional NEAs (e.g., Bennu and 1999 JU3) by NASA's OSIRIS REx and JAXA's Hayabusa 2 missions is planned to begin in 2018. This ARM option reduces mission risk and provides increased benefits for science, human exploration, resource utilization, and planetary defense. Science: The RBC option is an extremely large sample-return mission with the prospect of bringing back many tons of well-characterized asteroid material to the Earth-Moon system. The candidate boulder from the target NEA can be selected based on inputs from the world-wide science community, ensuring that the most scientifically interesting

  18. Evolución y dinámica de la barrera medanosa entre los arroyos Zabala y Claromecó, partidos de San Cayetano y Tres Arroyos, Buenos Aires Evolution and dynamics of the dune bar of San Cayetano and Tres Arroyos counties, Buenos Aires

    Directory of Open Access Journals (Sweden)

    L.C. Cortizo

    2007-11-01

    Full Text Available Se analiza un tramo del litoral sudeste de la provincia de Buenos Aires a través del análisis digital de fotografías del satélite Corona del año 1965 e imágenes del sensor Landsat TM (1999-2000. Datos complementarios concernientes a factores climáticos y morfología de playas fueron añadidos para el entendimiento de la dinámica eólica y de las formas medanosas resultantes. El proceso más importante fue la reducción en volumen de las formas medanosas reconocidas como semifijas y fijas al año 1965 (28% en la franja analizada de 70 x 3 km fundamentalmente por efectos del incremento en la humedad y reducción del aporte sedimentario. Se evidenció una variación en la dirección de los vientos predominantes del norte (1951-1960 al noroeste (1951-1990 que modificó la orientación de las crestas y favoreció la transición de médanos transversos barjanoides a parabólicos. La intensidad del viento del sector SO durante el período analizado fue el responsable de que las geoformas medanosas se mantengan en posición a expensas de una continua degradación. El efecto antrópico se ha centrado en la implantación de especies arbóreas para fijar las dunas así como para el desarrollo turístico (balnearios Claromecó, Orense y San Cayetano abarcando 50 Km² de una franja de 210 km²; aunque no hay efectos antrópicos que alteren la dinámica litoral. Se corroboró un aumento en las condiciones de humedad del suelo (aumento en las precipitaciones del 20% lo cual evidenció el rol de la vegetación en el control del campo de dunas.The coastal area of San Cayetano and Tres Arroyos counties was analyzed by mean of modern Landsat TM images (1999- 2000 and Corona satellite photographs of the year 1965. Data concerning climatic factors and beach morphology were added in order to understand aeolian dynamics and morphology of coastal dunes. The most important feature recognized was the reduction in volume of the dunes recognized as semi-fixed and

  19. Arecibo and Goldstone radar evidence for boulders on near-Earth asteroids

    Science.gov (United States)

    Benner, L.; Nolan, M.; Brozovic, M.; Taylor, P.; Busch, M.; Howell, E.; Margot, J.; Giorgini, J.; Springmann, A.; Naidu, S.; Magri, C.; Shepard, M.

    2014-07-01

    plausible interpretation for these particular observations is that the bright pixels are echoes from surface and near-surface boulders, which have been seen on each of the three near-Earth asteroids imaged by spacecraft: (433) Eros (NEAR-Shoemaker), (25143) Itokawa (Hayabusa), and (4179) Toutatis (Chang'e 2). These asteroids have also been imaged by radar, but the resolutions and/or signal-to-noise ratios were insufficient to reveal possible boulders. Bright spots were not evident in radar images of Toutatis obtained between 1992-2008, but following an upgrade in Goldstone's finest resolution from 19 to 4 m/pixel in 2010, a modest number of spots became visible in Goldstone images of Toutatis obtained in 2012. The prevalence of small radar bright spots on numerous NEAs establishes that features consistent with boulders can be detected in delay-Doppler radar images of particularly high-SNR targets and that these features are relatively common on near-Earth asteroid surfaces.

  20. Erratic boulder trains and cosmogenic exposure dating of former glacial limits: A case-study from Tierra del Fuego, southernmost South America

    Science.gov (United States)

    Darvill, Christopher; Stokes, Chris; Bentley, Mike

    2014-05-01

    Erratic Boulder Trains (EBTs) are a spectacular yet poorly-understood glacial geomorphological feature. These linear clusters of glacial erratic boulders help to illustrate the flow-lines of former glaciers by pin-pointing the parent rock from which they have originated and are often used as targets for cosmogenic nuclide exposure dating. Consequently, there is a need to understand their geomorphological significance to improve ice-sheet reconstructions and provide important contextual information for dating studies. The EBTs in Tierra del Fuego are some of the finest examples of this feature in the world, and this paper presents the first comprehensive mapping and physical assessment of four boulder trains. Unlike most other examples, they were deposited laterally rather than medially and are tightly clustered, presenting linear features only a few kilometres long that contain hundreds to thousands of huge boulders (often >8 m in diameter). The size and angularity of the boulders strongly supports the hypothesis that they were deposited as a supraglacial rock avalanche. The boulders have been the subject of previous cosmogenic dating, which have yielded anomalously young ages from deposits thought to be hundreds of thousands of years old. Analysis of weathering proxies shows little difference between boulder trains thought to be of radically different ages, with important implications for the timing of glaciations and potentially contradicting previous age constraints on glacial limits in the region.

  1. Restauración ecológica y paisajística del Arroyo de los Quiñones. San Sebastián de los Reyes, Madrid

    Directory of Open Access Journals (Sweden)

    Peinado Albendea, Pedro

    1996-04-01

    Full Text Available The restoration of the Arroyo (stream de los Quiñones (San Sebastián de los Reyes poses a problem whose solution consists in neutralizing the principal sources of its degradation. These sources are: waste water discharges, an urban solid waste dump, situated in the very bed of the stream, and the intensive aggregate extraction which made the stream itself disappear at various points. This article also deals with the recuperation of the surrounding wood in a natural and landscape-friendly way, which would facilitate the access and the walk along the sides of the stream. This would lead to the clearing of other areas of a high ecological value within this municipality.

    La restauración del Arroyo de los Quiñones (San Sebastián de los Reyes, Madrid plantea como problema resolver sus principales fuentes de degradación. Estas son los vertidos de aguas residuales, un vertedero de residuos sólidos urbanos ubicado en el cauce, y la intensiva extracción de áridos que ha llegado a hacer desaparecer el arroyo en diversas zonas. Posteriormente se plantea la recuperación del bosque ripario de una forma lo más natural paisajísticamente, facilitando el acceso y el paseo para des congestionar otras zonas de alto valor ecológico del término municipal.

  2. The quantitative estimation of the vulnerability of brick and concrete wall impacted by an experimental boulder

    Science.gov (United States)

    Zhang, J.; Guo, Z. X.; Wang, D.; Qian, H.

    2016-02-01

    There is little historic data about the vulnerability of damaged elements due to debris flow events in China. Therefore, it is difficult to quantitatively estimate the vulnerable elements suffered by debris flows. This paper is devoted to the research of the vulnerability of brick and concrete walls impacted by debris flows. An experimental boulder (an iron sphere) was applied to be the substitute of debris flow since it can produce similar shape impulse load on elements as debris flow. Several walls made of brick and concrete were constructed in prototype dimensions to physically simulate the damaged structures in debris flows. The maximum impact force was measured, and the damage conditions of the elements (including cracks and displacements) were collected, described and compared. The failure criterion of brick and concrete wall was proposed with reference to the structure characteristics as well as the damage pattern caused by debris flows. The quantitative estimation of the vulnerability of brick and concrete wall was finally established based on fuzzy mathematics and the proposed failure criterion. Momentum, maximum impact force and maximum impact bending moment were compared to be the best candidate for disaster intensity index. The results show that the maximum impact bending moment seems to be most suitable for the disaster intensity index in establishing vulnerability curve and formula.

  3. Field evaluation of a two-dimensional hydrodynamic model near boulders for habitat calculation

    Science.gov (United States)

    Waddle, Terry

    2009-01-01

    Two-dimensional hydrodynamic models are now widely used in aquatic habitat studies. To test the sensitivity of calculated habitat outcomes to limitations of such a model and of typical field data, bathmetry, depth and velocity data were collected for three discharges in the vicinity of two large boulders in the South Platte River (Colorado) and used in the River2D model. Simulated depth and velocity were compared with observed values at 204 locations and the differences in habitat numbers produced by observed and simulated conditions were calculated. The bulk of the differences between simulated and observed depth and velocity values were found to lie within the likely error of measurement. However, the effect of flow simulation outliers on potential habitat outcomes must be considered when using 2D models for habitat simulation. Furthermore, the shape of the habitat suitability relation can influence the effects of simulation errors. Habitat relations with steep slopes in the velocity ranges found in similar study areas are expected to be sensitive to the magnitude of error found here. Comparison of habitat values derived from simulated and observed depth and velocity revealed a small tendency to under-predict habitat values.

  4. Field evaluation of a two-dimensinal hydrodynamic model near boulders for habitat calculation

    Science.gov (United States)

    Waddle, Terry

    2010-01-01

    Two-dimensional hydrodynamic models are now widely used in aquatic habitat studies. To test the sensitivity of calculated habitat outcomes to limitations of such a model and of typical field data, bathymetry, depth and velocity data were collected for three discharges in the vicinity of two large boulders in the South Platte River (Colorado) and used in the River2D model. Simulated depth and velocity were compared with observed values at 204 locations and the differences in habitat numbers produced by observed and simulated conditions were calculated. The bulk of the differences between simulated and observed depth and velocity values were found to lie within the likely error of measurement. However, the effect of flow simulation outliers on potential habitat outcomes must be considered when using 2D models for habitat simulation. Furthermore, the shape of the habitat suitability relation can influence the effects of simulation errors. Habitat relations with steep slopes in the velocity ranges found in similar study areas are expected to be sensitive to the magnitude of error found here. Comparison of habitat values derived from simulated and observed depth and velocity revealed a small tendency to under-predict habitat values.

  5. Flatiron-Erie 115kV transmission line project, Larimer, Weld and Boulder Counties, Colorado

    International Nuclear Information System (INIS)

    Western Area Power Administration (Western) proposes to uprate its existing 115-kV Flatiron-Erie transmission line. The line is located in Larimer, Weld and Boulder Counties, Colorado, and passes through the City of Longmont. The line connects Flatiron Substation and several of the substations supplying Longmont. It is a single circuit 115-kV line, 31.5 miles long, and was built in 1950-51 on a 75-foot wide right-of-way (ROW) using wood H-frame structures. Western proposes to build 27 new structures along the line, to replace or modify 45 of the existing structures and to remote 11 of them. Many of these additions and changes would involve structures that are approximately 5 to 15 feet taller than the existing ones. The existing conductors and ground wires would remain in place. The purpose of these actions would be to allow the power carrying capability of the line to be increased and to replace deteriorating/structural members. Western would be the sole participant in the proposed project. This report gives an analysis of the study area environment and the development of alternative routes. An assessment is presented of the impacts of the primary alternative routes. The environmental consequences of this project are addressed

  6. Stable isotopic records of bleaching and endolithic algae blooms in the skeleton of the boulder forming coral Montastraea faveolata

    OpenAIRE

    Hartmann, A.C.; Carilli, J. E.; Norris, R. D.; Charles, C. D.; Deheyn, D. D.

    2010-01-01

    Within boulder forming corals, fixation of dissolved inorganic carbon is performed by symbiotic dinoflagellates within the coral tissue and, to a lesser extent, endolithic algae within the coral skeleton. Endolithic algae produce distinctive green bands in the coral skeleton, and their origin may be related to periods of coral bleaching due to complete loss of dinoflagellate symbionts or “paling” in which symbiont populations are patchily reduced in coral tissue. Stable carbon isotopes were a...

  7. Evaluación de la vulnerabilidad del acuífero libre en la cuenca del arroyo El cura, Gualeguaychú, Entre ríos

    Directory of Open Access Journals (Sweden)

    Pamela Boujon

    2014-06-01

    Full Text Available El trabajo analiza la cuenca del arroyo El Cura, ubicada al sur de la ciudad de Gualeguaychú, Entre Ríos, donde se encuentra el relleno sanitario municipal. Con el objetivo de evaluar la vulnerabilidad a la contaminación del acuífero libre, se estudió la geología y la hidrogeología del área. Se identificaron dos niveles loéssicos (Formaciones Hernandarias y Tezanos Pinto de edad pleistocena media y superior respectivamente, que contienen al acuífero freático. A partir de la piezometría, se pudo determinar el carácter efluente del arroyo, con dirección principal del flujo subterráneo de SO a NE y, gradientes hidráulicos regionales del orden de 0,0016. Pudo verificarse que la salinidad del agua subterránea se incrementa en esa dirección. Se observó una relación directa entre las unidades geomorfológicas definidas para la cuenca (PL, PA y TPRG y la química del agua subterránea, que evoluciona de bicarbonatada cálcica en PL a bicarbonatada sódica en PA y TPRG. La relación entre los niveles piezométricos y la hidroquímica subterránea permitieron inferir zonas de recarga y descarga. Se aplicaron tres metodologías (EKv, GOD y GODS para establecer áreas vulnerables a la contaminación y el grado de vulnerabilidad de la cuenca. El método más efectivo fue el GODS, obteniéndose tres grados de vulnerabilidad asociadas básicamente a las unidades geomorfológicas (alta para TPRG; moderada para PA y baja para PL, y a las litologías que las componen. Asimismo, pudo observarse que las áreas más vulnerables están asociadas con los niveles piezométricos más bajos.

  8. Caracterización morfométrica de la cuenca alta del arroyo Las Lajas, Córdoba: Un análisis estadístico

    Directory of Open Access Journals (Sweden)

    N. Doffo

    2005-03-01

    Full Text Available En base a un análisis estadístico de los principales parámetros morfomé tricos, se hace una caracterización hidrológica de la cuenca alta del arroyo Las Lajas. En particular se discute la influencia de la estructura y litología sobre el diseño de la red de drenaje. La cuenca alta del arroyo Las Lajas drena una superficie aproximada de 41 km² y se desarrolla sobre un basamento plutónico-metamórfico del Precámbrico-Paleozoico superior. El relieve está conformado por serranías bajas, valles de fondo plano, con relleno aluvial y coluvial. La precipitación media anual es de 860 mm. La forma de la cuenca está parcialmente controlada por la Falla Las Lajas. Los parámetros morfométricos utilizados son: densidad de drenaje, frecuencia de cursos de primer orden, rugosidad de la cuenca, relación de bifurcación, relación de longitudes y relación de elongación. Estos se aplicaron a subcuencas de tercer orden, agrupadas en un sector oriental y otro occidental, delimitados por la Falla Las Lajas. De cada parámetro medido se obtuvieron estadísticos de posición y de dispersión y se realizaron, previa prueba de normalidad y de correlación, tests estadísticos, análisis de agrupamiento y factorial. El resultado no demuestra que exista un control litológico sobre el diseño de la red de drenaje. Un análisis de agrupamiento sobre las subcuencas indica una división en dos conjuntos que no muestran una relación obvia con la estructura ni la litología del sustrato.

  9. Potential for timing high-energy marine inundation events in the recent geological past through age-dating of reef boulders in Fiji

    Science.gov (United States)

    Terry, James P.; Etienne, Samuel

    2014-12-01

    Transported coastal boulders have increasingly come to represent a valuable element of investigations within the broader framework of multi-proxy approaches applied to coastal hazard studies. Through a case study on Taveuni Island in Fiji, this paper outlines some approaches and hindrances to effective timing of prehistorical high-energy marine inundation events (storms and tsunamis) on tropical coastlines from the evidence of reef-platform carbonate boulders. Various sources of errors are outlined that investigators must consider when attempting to use carbonate boulder ages as a surrogate for timing past events. On Taveuni, uranium : thorium dates with a high level of precision (1-7 years) suggest that major inundation events have a return period of approximately 40-45 years since 1650 AD. Of particular importance, considerably different age dates are provided by coral samples sourced from the top and bottom (i.e. opposite faces) of individual boulders, so highlighting interpretation biases that must be avoided.

  10. A Re-Evaluation of the Relativistic Redshift on Frequency Standards at NIST, Boulder, Colorado, USA

    Science.gov (United States)

    Pavlis, N. K.; Weiss, M. A.

    2014-12-01

    Primary frequency standards that realize the definition of the second based on the Caesium (Cs) atom are used to steer International Atomic Time. According to the theory of relativity, their frequency should be adjusted to that at which these would operate, if located on the geoid. Current best standards for the current definition of the second are approaching uncertainties of one part in 1016. Optical frequency standards however are now reaching uncertainties of few parts in 1018 and are expected to lead to a new definition of the second. Their performance requires centimetre-level geoid accuracy, in order to calculate accurately the redshift frequency offset necessary for their inter-comparison. We re-evaluated the relativistic redshift of the frequency standards at NIST in Boulder, Colorado, USA, based on a recent precise GPS survey of several benchmarks on the roof of the building where these are housed, and on global and local geoid models supported by data from the GRACE and GOCE missions, including EGM2008, USGG2009, and USGG2012. We also evaluated the redshift offset based on the published NAVD88 geopotential number of the levelling benchmark Q407, after estimating the bias of the NAVD88 datum at our specific location. We present and discuss the results that we obtained using different methods, and provide our current estimate of the redshift offset and of its accuracy, considering the main error sources contributing to the total error budget. We compare our current estimates to those published by Pavlis and Weiss in 2003, using the data and models that were available at that time. We also discuss the prospects of using inter-connected ultra-precise frequency standards for the direct determination of geoid height differences, which may provide in the not-too-distant future an alternative approach for the establishment of vertical datums and the independent verification of the accuracy of global and local geoid models.

  11. La Preparación Física Profesional en tabaqueros de la Fábrica Serafín Sánchez Valdivia en Arroyo Blanco.

    Directory of Open Access Journals (Sweden)

    Luis Bécquer Quesada

    2009-10-01

    Full Text Available La preparación física profesional es un proceso especializado y dirigido al desarrollo de las capacidades físicas, psíquicas y de hábitos motores en los trabajadores, lo que resulta imprescindible para elevar la efectividad y la capacidad de trabajo. Para el presente trabajo se elaboró un sistema de ejercicios (contracción muscular, flexibilidad para contribuir al mejoramiento de la preparación física profesional en los tabaqueros, de la fábrica Serafín Sánchez Valdivia en Arroyo Blanco. En esta investigación se tomó una población integrada por los 39 tabaqueros de la entidad y como muestra 10 de ellos, lo que representa el (25.64%. El Objeto de estudio de esta investigación es el Proceso de Preparación para la Salud de los Tabaqueros y como métodos se utilizó el Teórico (análisis-síntesis, histórico-lógico, inductivo-deductivo y Enfoque de sistema, Empíricos: la observación, encuesta, entrevista y Validación mediante consulta a especialistas.

  12. Boulders, biology and buildings: Why weathering is vital to geomorphology (Ralph Alger Bagnold Medal Lecture)

    Science.gov (United States)

    Viles, Heather A.

    2015-04-01

    Weathering is vital to geomorphology in three main senses. First, it is vital in the sense of being a fundamental and near-ubiquitous earth surface process without which landscapes would not develop, and which also provides a key link between geomorphology and the broader Earth system. Second, weathering is vital in the sense that, as it is heavily influenced by biotic processes, it demonstrates the importance of life to geomorphology and vice versa. In particular, weathering illustrates the many cross-linkages between microbial ecosystems and geomorphology. Finally, it is vital in the sense that weathering provides an important practical application of geomorphological knowledge. Geomorphologists in recent years have contributed much in terms of improving understanding the deterioration of rocks, stone and other materials in heritage sites and the built environment. This knowledge has also had direct implications for heritage conservation. This lecture reviews recent research on each of these three themes and on their linkages, and sets an integrated research agenda for the future. Weathering as a key process underpinning geomorphology and Earth system science has been the subject of much recent conceptual and empirical research. In particular, conceptual research advances have involved improving conceptualisation of scale issues and process synergies, and understanding weathering in terms of non-linear dynamical systems. Empirical advances have included the development of larger datasets on weathering rates, and the application of a wide range of non-destructive and remote sensing techniques to quantify weathering morphologies on boulder and rock surfaces. In recent years, understanding of the complex linkages between ecology and geomorphology (sometimes called biogeomorphology) has advanced particularly strongly in terms of weathering. For example, the influences of disturbance on biota and weathering have been conceptualised and investigated empirically in a

  13. Economic Impacts from the Boulder County, Colorado, ClimateSmart Loan Program: Using Property-Assessed Clean Energy Financing

    Energy Technology Data Exchange (ETDEWEB)

    Goldberg, M.; Cliburn, J. K.; Coughlin, J.

    2011-04-01

    This report examines the economic impacts (including job creation) from the Boulder County, Colorado, ClimateSmart Loan Program (CSLP), an example of Property-Assessed Clean Energy (PACE) financing. The CSLP was the first test of PACE financing on a multi-jurisdictional level (involving individual cities as well as the county government). It was also the first PACE program to comprehensively address energy efficiency measures and renewable energy, and it was the first funded by a public offering of both taxable and tax-exempt bonds.

  14. Collaboration Between Environmental Water Chemistry Students and Hazardous Waste Treatment Specialists on the University of Colorado-Boulder Campus

    Science.gov (United States)

    Dittrich, T. M.

    2012-12-01

    The University of Colorado-Boulder is one of a few universities in the country that has a licensed Treatment, Storage, and Disposal Facility (TSDF) for hazardous waste on campus. This facility, located on the bottom floor of the Environmental Health and Safety (EH&S) building, allows CU to more economically treat hazardous waste by enabling treatment specialists on staff to safely collect and organize the hazardous waste generated on campus. Hazardous waste is anything that contains a regulated chemical or compound and most chemicals used in engineering labs (e.g., acids, solvents, metal solutions) fall into this category. The EH&S staff is able to treat close almost 33% of the waste from campus and the rest is packed for off-site treatment at various places all over the country for disposal (e.g., Sauget, IL, Port Aurthor, TX). The CU-Boulder campus produced over 50 tons of hazardous waste in 2010 costing over $300,000 in off-campus expenses. The EH&S staff assigns one of over 50 codes to the waste which will determine if the waste can be treated on campus of must be shipped off campus to be disposed of. If the waste can be treated on campus, it will undergo one of three processes: 1) neutralization, 2) UV-ozone oxidation, or 3) ion exchange. If the waste is acidic but contains no heavy metals, the acid is neutralized with sodium hydroxide (a base) and can be disposed "down the drain" to the Boulder Wastewater Treatment Plant. If the waste contains organic compounds and no metals, a UV-ozone oxidation system is used to break down the organic compounds. Silver from photography wastewater can be removed using ion exchange columns. Undergraduate and graduate students worked with the hazardous waste treatment facility at the Environmental Health and Safety (EH&S) building on the CU-Boulder campus during the fall of 2011 and fall of 2012. Early in the semester, students receive a tour of the three batch treatment processes the facility is equipped with. Later in the

  15. Judges of peace, masons and conservatives on Buenos Airesïcountryside. An approximation to the personal links on the south of the Buenos Airesïprovince (Tres Arroyos, 1865-1910 Jueces de paz, masones y conservadores en la campaña bonaerense: Una aproximación a las redes vinculares en el sur de la provincia de Buenos Aires [Tres Arroyos, 1865-1910

    Directory of Open Access Journals (Sweden)

    Leandro A. Di Gresia

    2010-01-01

    Full Text Available The purpose of this article is to analyze the way in which Justice of the Peace was implemented in Buenos Aires Province, Argentina, between 1865 and 1910, through the study of the subjects who acted in such capacity and the political framework in which they took part. The work was carried out taking into account one particular Justice of the Peace Office, the one located at Tres Arroyos County. On the one hand, the profile of the subjects who acted as Justices of the Peace is reconstructed so as to understand the logics guiding the appointment thereof. For this, research work is done in order to reconstruct their biographies associated to the different terms of office and local institutionalization. Then, two grouping modes that served as a relational basis for local individuals and that allowed to complete the explanation developed from individual biographies are identified: an initiation ritual-type network, as it was the case of masonry, and a local conservatism network, managed by local and powerful ranch and farm owners. Finally, it is observed if these networks had an influence on local justice administration. The sources used are several local commemorative albums, census data, local newspapers, criminal records brought before the Justice of the Peace in Tres Arroyos, the Copybook of the Justice of the Peace Office, and the Book of Records of Tres Arroyos Hiram Lodge.Este artículo se propone analizar la forma en que se implantó la Justicia de Paz en el interior de la provincia de Buenos Aires entre 1865 y 1910, a través del estudio de los sujetos que desempeñaron esa función y los entramados políticos en los que participaron. El mismo se ha realizado a partir del estudio de un Juzgado en particular, como fue el del partido de Tres Arroyos. Por un lado, se reconstruye el perfil de los sujetos que ejercieron el cargo de Jueces de Paz, con la intención de entender las lógicas que guiaron su designación. Para ello, se indaga en la

  16. Análisis del control geológico en la torrencialidad del arroyo Las Lajas, Córdoba, a través de la modelización hidrológica

    OpenAIRE

    Nelso C. Doffo; Carlos F. Eric; Gustavo González Bonorino

    2010-01-01

    Se analiza la incidencia de factores litológicos, estructurales y bióticos en la respuesta hidrológica (torrencialidad) de una cuenca hídrica serrana aplicando el modelo matemático ARHymo. La cuenca alta del arroyo Las Lajas se encuentra en las sierras de Comechingones, entre 1.200 y 750 m s.n.m., con una superficie de 41 km2 y una red de drenaje de orden de Horton 6. La morfología de la cuenca está fuertemente controlada por la traza de la falla Las Lajas, una estructura de actividad recient...

  17. Evaluación del estado trófico de arroyos de la cuenca de Paso Severino (Florida, Uruguay) mediante la utilización del índice biótico TSI-BI

    OpenAIRE

    Pacheco, Juan Pablo; Arocena, Rafael; Chalar, Guillermo; García, Patricia; González Piana, Mauricio; Fabián, Daniel; Silva, Macarena; Olivero, Vanesa

    2012-01-01

    Los macroinvertebrados acuáticos responden a las características de su ambiente reflejando las alteraciones en el mismo. Por ello, son frecuentemente utilizados como indicadores biológicos en estudios de calidad de agua y monitoreo ambiental. El índice de estado trófico TSI-BI creado para la cuenca del río Santa Lucía, que incluye la cuenca de estudio, permite conocer el estado trófico de los arroyos mediante su composición de macroinvertebrados acuáticos. El objetivo de este trabajo es ev...

  18. Estado trófico de arroyos de la cuenca de Paso Severino mediante la utilización del índice biótico TSI-BI

    OpenAIRE

    Pacheco, Juan Pablo; Arocena, Rafael; Chalar, Guillermo; García, Patricia; González Piana, Mauricio; Fabián, Daniel; Olivero, Vanesa; Silva, Macarena

    2012-01-01

    Los macroinvertebrados acuáticos responden a las características de su ambiente reflejando las alteraciones en el mismo. Por ello, son frecuentemente utilizados como indicadores biológicos en estudios de calidad de agua y monitoreo ambiental. El índice de estado trófico TSI-BI creado para la cuenca del río Santa Lucía, que incluye la cuenca de estudio, permite conocer el estado trófico de los arroyos mediante su composición de macroinvertebrados acuáticos. El objetivo de este trabajo es evalu...

  19. Estado trófico de arroyos de la cuenca de Paso Severino mediante la utilización del índice biótico TSI-BI

    OpenAIRE

    Juan Pablo Pacheco; Rafael Arocena; Guillermo Chalar; Patricia García; Mauricio Gonzalez-Piana; Daniel Fabian; Vanesa Olivero; Macarena Silva

    2013-01-01

    Los macroinvertebrados acuáticos responden a las características de su ambiente reflejando las alteraciones en el mismo. Por ello, son frecuentemente utilizados como indicadores biológicos en estudios de calidad de agua y monitoreo ambiental. El índice de estado trófico TSI-BI creado para la cuenca del río Santa Lucía, que incluye la cuenca de estudio, permite conocer el estado trófico de los arroyos mediante su composición de macroinvertebrados acuáticos. El objetivo de este trabajo es evalu...

  20. Can erosion control structures in large dryland arroyo channels lead to resilient riparian and cienega restoration? Observations from LiDAR, monitoring and modeling at Rancho San Bernardino, Sonora, MX

    Science.gov (United States)

    DeLong, S.; Henderson, W. M.

    2012-12-01

    The use of erosion control structures to mitigate or even reverse erosion and to restore ecological function along dryland channels (arroyos and gullies) has led to a long list of both successful and failed restoration efforts. We propose that successful implementation of "engineering" approaches to fluvial restoration that include in-channel control structures require either a quantitative approach to design (by scientists and engineers), or intimate on-the-ground knowledge, local observation, and a commitment to adapt and maintain restoration efforts in response to landscape change (by local land managers), or both. We further propose that the biophysical interactions among engineering, sedimentation, flood hydrology and vegetation reestablishment are what determine resilience to destructive extreme events that commonly cause erosion control structure failure. Our insights come from comprehensive monitoring of a remarkable experiment underway at Ranch San Bernardino, Sonora, MX. At this site, private landowners are working to restore ecosystem function to riparian corridors and former cieñega wetlands using cessation of grazing; vegetation planting; upland grass restoration; large scale rock gabions (up to 100 m wide) to encourage local sediment deposition and water storage; and large earthen berms (up to 900 m wide) with cement spillways that form reservoirs that fill rapidly with water and sediment. Well-planned and managed erosion control structures have been used elsewhere successfully in smaller gully networks, but we are unaware of a comparable attempt to use gabions and berms for the sole purpose of ecological restoration along >10 km of arroyo channels draining watersheds on the order of ~400 km2 and larger. We present an approach to monitoring the efficacy of arroyo channel restoration using terrestrial and airborne LiDAR, remote sensing, streamflow monitoring, shallow groundwater monitoring, hydrological modeling and field observation. Our methods

  1. El depósito de sulfuros masivos polimetálicos de Arroyo Rojo, Tierra del Fuego (Argentina): Mineralogía, geoquímica y metalogenia

    OpenAIRE

    Biel Soria, Cecilia; Subías Pérez, Ignacio Ernesto; Acevedo, Rogelio Daniel

    2011-01-01

    El objetivo de esta tesis es avanzar en el conocimiento de la geología y modelos de alteración hidrotermal de los yacimientos de sulfuros masivos de los Andes Fueguinos. Para ello se ha seleccionado el depósito de Arroyo Rojo, el más representativo del cinturón Río Encajado-Río Hambre (Tierra del Fuego, Argentina). Este depósito encaja en la parte volcánica y volcanoclástica de la Formación Lemaire, de edad jurásica media, compuesta de base a techo por: riolitas, dacitas, ignimbritas, tobas y...

  2. Restauración ecológica y paisajística del Arroyo de los Quiñones. San Sebastián de los Reyes, Madrid

    OpenAIRE

    Peinado Albendea, Pedro; Villafañe, Juan Pablo

    1996-01-01

    The restoration of the Arroyo (stream) de los Quiñones (San Sebastián de los Reyes) poses a problem whose solution consists in neutralizing the principal sources of its degradation. These sources are: waste water discharges, an urban solid waste dump, situated in the very bed of the stream, and the intensive aggregate extraction which made the stream itself disappear at various points. This article also deals with the recuperation of the surrounding wood in a natural and landscape-friend...

  3. Evaluación de la recarga natural al acuífero de la cuenca superior del arroyo Napostá Grande, provincia de Buenos Aires Natural recharge evaluation of the aquifer in the upper Arroyo Napostá Grande basin, province of Buenos Aires

    Directory of Open Access Journals (Sweden)

    Jorge C. Carrica

    2004-06-01

    Full Text Available La cuenca superior del arroyo Napostá Grande constituye un área de interés para la explotación del recurso hídrico subterráneo como fuente alternativa de abastecimiento de agua a núcleos urbanos de la región entre los que se encuentra la ciudad de Bahía Blanca. El acuífero freático del sector recibe recarga directa de la lluvia a través de la zona no saturada, recarga localizada en el piedemonte serrano y, en mucha menor cuantía, la indirecta por almacenamiento de banco durante las crecidas del arroyo. El objetivo del estudio es determinar cuantitativamente el valor de la recarga y cuales de los mencionados mecanismos son los más importantes, mediante el empleo de distintos métodos: balances hidrológicos diarios a escala de cuenca (programa Visual Balan y de suelo (programa Balshort, balance de cloruros entre el agua de lluvia y el agua de la capa freática y análisis de la curva de recesión de hidrogramas fluviales. Se concluye que la recarga pluvial, localizada en el piedemonte serrano, es la principal fuente de alimentación del acuífero y que, según el método de estimación empleado, la recarga total al acuífero se cifra entre un 7 y un 9% de la precipitación anual media.The upper river basin of Napostá Grande creek constitutes an area of interest for ground water exploitation as an alternative source of water supply to Bahía Blanca city and other urban nuclei of the region. The phreatic aquifer in this area receives direct rain recharge through the unsaturated zone, recharge located in the piedmont area and indirect recharge from bank storage during the streamflow peak in smaller quantity. The objective of the study is to determine quantitatively the recharge and the ranking of the mentioned mechanisms through different methods: daily hydrologic balance both on basin scale (Visual Balan program and soil (Balshort program; chloride balance between rainwater and groundwater and analysis of the hydrograph recession

  4. Petrología de la secuencia volcánica cenozoica en el área del arroyo Ranquil Huao: Meseta de Somún Curá. Patagonia Extraandina

    Directory of Open Access Journals (Sweden)

    M. B. Remesal

    2002-09-01

    Full Text Available En el norte de la Patagonia extraandina, involucrando parte de las provincias geográficas de Río Negro y Chubut se extiende un amplio derrame basáltico tipo plateau. El valle del arroyo Ranquil Huao, en el sector austral del plateau, en las proximidades de la localidad de Telsen, expone una secuencia interesante y bastante completa de esa asociación volcánica cenozoica. En este corte es posible estudiar no sólo los flujos basálticos correspondientes a la Formación Somún Curá, sino también los derrames denominados Basalto La Mesada, incluidos en la Superunidad Quiñelaf y los depósitos tobáceos del Grupo Sarmiento. Los basaltos de la Formación Somún Curá presentan rasgos petrográficos y geoquímicos similares a los del Basalto La Mesada (Superunidad Quiñelaf. El flujo piroclástico que se intercala en la parte más alta de la Formación Somún Curá complementa la estratigrafía conocida para esta unidad. Las características de las basanitas aflorantes en el tramo medio del valle del arroyo Ranquil Huao permiten diferenciarlas de las rocas que constituyen las otras unidades basálticas en la secuencia.

  5. Rasgos Geoquímicos de las Calizas de la Formación Arroyo Verde (Eoceno, en Punta Colorada. Provincia de Río Negro. Argentina: Reconstrucción Paleoambiental Geochemical features of limestones in Arroyo Verde Formation (Eocene in Punta Colorada. Río Negro Province. Argentina: Palaeoenvironmental reconstruction

    Directory of Open Access Journals (Sweden)

    Liliana Luna

    2008-12-01

    Full Text Available El creciente desarrollo de la industria cementera ha reactivado la exploración de los yacimientos de calizas en el sur de Argentina. En la zona de Punta Colorada, a 36 km de Sierra Grande, Prov. de Río Negro, se encuentra un depósito de estas rocas pertenecientes a la Formación Arroyo Verde, del Eoceno inferior, originada por una ingresión marina ocurrida el Cretácico superior-Terciario inferior. A través de un estudio técnico se cubicaron 14.806.106 tn de reservas medidas y 1.799.174 tn de reservas indicadas en carbonato de calidad menor al 4 % MgO. Se estudió un área de 800 Ha, dividida en 2 zonas ubicadas al norte y al sur de Punta Colorada, separadas por el Arroyo Las Palmas, en el litoral marítimo atlántico. Se determinó una potencia media de 10 m de calizas por medio de perforaciones y perfiles. El análisis de los perfiles permitió establecer 4 niveles compuestos por calizas masivas a granulares, con estratificación entrecruzada, fosilíferas. Microscópicamente se observan bivalvos, equinodermos, corales, foraminíferos y algas. La fracción clástica terrígena, tamaño arena-limo, está compuesta principalmente por cuarzo, feldespato y concreciones arcillosas verdosas. Se analizaron los tenores de CaO, MgO y se calcularon las relaciones Mg/Ca observándose variaciones verticales con aumento del MgO hacia los niveles superiores del yacimiento. Sobre la base de los porcentajes de estos óxidos se clasifica a las rocas en caliza, caliza dolomítica y dolomita calcítica. Se analizaron además Al, Fe, K, Mg, Mn, Na, P, S y Ti, observándose variaciones geoquímicas laterales y verticales que se relacionarían con cambios morfológicos, paleoambientales y de evolución de la cuenca. Se concluye que las calizas están constituidas principalmente por calcita con cantidades variables de MgO. Estas rocas se habrían formado en lagunas costeras de aguas cálidas, con alto contenido en fósforo. En otros sectores de la cuenca se

  6. Methodical comparison of neutron depth probes and long-term soil moisture measurements on loess, sandy loess, and boulder clay

    International Nuclear Information System (INIS)

    Three measuring instruments were tested: 0.05 mCi Cf-252, 100 mCi Am-241/Be, 500 mCi Am-241/Be. The advantages - measurement in undisturbed soil profiles, large depths of measurement, reproducibility of measurements in the same place over several years - and the disadvantages - radiation protection, resolution, variations of measured volume in dependence of moisture, background influences etc. - have been critically checked by experiment. In addition, annual soil moisture curves have been measured over two years by parallel use of the free probes on a loess, sandy loess, and boulder clay site. The results were compared and discussed with a view to the soil water dynamics of these sites. (orig./HP)

  7. Oncoides tipo Osagia en la Formación La Manga (Oxfordiano y su significado paleoecológico, arroyo La Vaina, Mendoza

    Directory of Open Access Journals (Sweden)

    R.M. Palma

    2007-03-01

    Full Text Available Oncoides microbianos fueron encontrados en calizas del Oxfordiano de la Formación La Manga en la sección del Arroyo La Vaina, provincia de Mendoza. Los oncoides se presentan en packstones, floatstones-rudstones o dispersos en wackestones. Presentan formas elípticas, ameboidales y esféricas. Se reconocieron diferentes tipos de oncoides de acuerdo a las características de sus envolturas: (1 laminaciones micríticas, (2 laminaciones grumosas, y (3 laminaciones con organismos incrustantes. Sus núcleos están representados por fragmentos de moluscos, equinoideos, peloides e intraclastos. La envoltura sigue la forma del núcleo en la zona interna de la corteza. Sin embargo, en las zonas externas, la laminación contiene organismos incrustantes dominados por nubeculáridos y serpúlidos. Algunos oncoides, especialmente las formas ameboidales y elípticas, están caracterizados por múltiples núcleos, representados por oncoides pequeños. Los oncoides aparecen conjuntamente con bivalvos, equinodermos, foraminíferos y serpúlidos. La fauna indica condiciones someras, tranquilas, y la excelente preservación de los equinodermos sugiere mínimo transporte antes del enterramiento. Los oncoides crecieron en un ambiente marino normal, en el sector submareal, de aguas someras, con agitación leve a moderada. El limitado rolido en el crecimiento de los oncoides probablemente fue acompañado por corrientes intermitentes que reorientaron los oncoides paralelos a la estratificación. La laminación discontinua con organismos incrustantes refleja períodos de no agitación y litificación que facilitaron el crecimiento de organismos incrustantes sobre oncoides estáticos durante un período de baja tasa de sedimentación. La depositación de calizas con oncoides ocurrió durante la somerización del intervalo carbonático, asociada con la emersión, exposición subaérea y desarrollo de un paleokarst, como consecuencia de fluctuaciones relativas del nivel

  8. La zona de alteración Arroyo La Chilca-Zanjón del Buitre, bloque de San Rafael, Mendoza

    Directory of Open Access Journals (Sweden)

    Nora Rubinstein

    2012-06-01

    Full Text Available La zona de alteración Arroyo La Chilca-Zanjón del Buitre está ubicada en el bloque de San Rafael (35°24'8" S; 68°19'25,8" O, Mendoza. Estudios previos definieron preliminarmente que corresponde a un sistema de tipo pórfro cuprífero vinculado genéticamente al magmatismo gondwánico. Esta área de alteración se desarrolla en una secuencia compuesta por brechas ignimbríticas e ignimbritas traquiandesíticas con intercalaciones de areniscas tobáceas y coladas andesíticas a las que intruyen cuerpos subvolcánicos andesíticos y traquiandesítico-dacíticos. La litología de la secuencia volcánica así como sus características geoquímicas confirman su correlación con la sección inferior del ciclo magmático Choiyoi (Pérmico inferior. El área de alteración presenta una zona potásica con una asociación compuesta por feldespato potásico-cuarzo-magnetita. A ésta se superpone alteración fílica con una asociación de cuarzo-muscovita-pirita-(rutilo acompañada por venillas de cuarzo-pirita. Por último se reconoce una carbonatización tardía. En las proximidades de la zona de alteración aforan vetillas con mineralización de pirita-calcopirita-galena-esfalerita en ganga de cuarzo. La geoquímica de metales indica moderadas anomalías de Ag y Au y pequeñas anomalías de Cu, Mo, Pb y Zn. El análisis estadístico permite definir la existencia de un pulso mineralizante de Cu-Mo y un segundo pulso de Mo reconocido solamente en Zanjón del Buitre. Asimismo se definen dos pulsos de Zn, uno de los cuales estaría genéticamente vinculado al Cu.

  9. Captive propagation, reproductive biology, and early life history of Etheostoma wapiti (Boulder Darter), E. vulneratum (Wounded Darter), and E. maculatum (Spotted Darter)

    Science.gov (United States)

    Ruble, Crystal L.; Rakes, Patrick L.; Shute, John R.; Welsh, Stuart

    2016-01-01

    Reproductive biology and early life-history data are important for understanding the ecology of fishes. In 2008, we conducted captive propagation studies on 3 species of darters of the subgenus Nothonotus: Etheostoma wapiti (Boulder Darter), E. vulneratum (Wounded Darter), and E. maculatum (Spotted Darter). The length of spawning period and associated range of water temperatures for the Wounded Darter exceeded that of the Spotted Darter and Boulder Darter. The mean number of eggs produced per female was lowest for Boulder Darter and highest in the Wounded Darter. The Boulder Darter had the highest percent of eggs hatched, the lowest percent larval to juvenile stage survivorship, and the lowest mean number of juveniles produced per female. Egg diameters at deposition and prior to hatch were smallest for the Spotted Darter. If reproductive biology and early lifehistory information from captive fishes represent that of wild populations, then the data obtained during this study are relevant to development and implementation of conservation and management plans for these closely related darter species.

  10. Results of the Boulder Consultation: The Beginnings of a Technical Assistance Program for the Office of Environmental Education/USOE/HEW.

    Science.gov (United States)

    Office of Education (DHEW), Washington, DC. Office of Environmental Education.

    In December 1977, the Office of Environmental Education (OEE) brought its fiscal year '77 grant recipients together in Boulder, Colorado, for a technical assistance consultation. The technical assistance responsibilities of OEE are mandated by the Environmental Education Act. Until this consultation, OEE had been giving its technical assistance on…

  11. Paleoclimate Reconstruction during the 17th to 18th Century Using Fossil Coral Tsunami Boulders from Ishigaki Island, the Ryukyus, Japan

    Science.gov (United States)

    Tsuzuki, K.; Yokoyama, Y.; Seki, A.; Kawakubo, Y.; Araoka, D.; Suzuki, A.

    2014-12-01

    Little Ice Age (LIA) which lasted during approximately 1450 to 1850 (e.g. Grove, 1988) is known as naturally occurring climate fluctuation, so knowing LIA in detail is necessary to improve climate models. Instrumental records can only extend back to about 100 years in many areas, thus paleoclimate records are reconstructed using proxies in tree rings, sediments and so force. However there are differences in reconstructed timings and magnitudes of LIA occurred in each area (Overpack et al., 1997), and most of the records are based mainly on terrestrial proxies such as tree ring records, whereas only limited numbers of marine records are available (Mann et al., 2008). Coral skeletal climatology is a useful tool to reconstruct marine paleoclimate records in tropics and subtropics. Hermatypic corals, Porites spp. have aragonite skeletons and they have annual bands, which are suitable to reconstruct high-resolution paleoclimate in seasonal scale by measuring chemical compositions. Skeletal Sr/Ca ratio in Porites spp. has been widely used as a reliable proxy of SST (Sea Surface Temperature). However, corals grow for approximately several decades to 200 years, hence it is difficult to reconstruct LIA paleoclimate using living corals. Cobb et al. (2003) used fossil corals casted on shore by storms to reconstruct millennial scale paleoclimate. There are fossil coral boulders in the eastern coast of Ishigaki Island, Ryukyus, Japan. These fossil coral boulders were casted on shore by paleo Tsunami events, thus they are called "Tsunami boulders" (Araoka et al., 2010). Fossil corals used by Cobb et al. have 30-90-year records while some large Tsunami boulders have multi-centennial continuous records. In this study, we reconstruct paleo SST using the Tsunami boulder from Ishigaki Island. The boulder has 185 years of annual banding. U-series dating shows the boulder was moved on shore at Meiwa earthquake in 1771. We measure Sr/Ca ratio using LA-HR-ICPMS (Laser Ablation High

  12. Avaliação do consumo alimentar residual em touros jovens da raça Nelore Mocho em prova de desempenho animal - DOI: 10.4025/actascianimsci.v30i4.6464 Evaluation of residual feed intake in young bulls of the Polled Nellore breed in a performance test - DOI: 10.4025/actascianimsci.v30i4.6464

    Directory of Open Access Journals (Sweden)

    Ivone Yurika Mizubuti

    2009-03-01

    Full Text Available Este trabalho avaliou as características: idade, peso, ganho de peso diário (GPD, ingestão de matéria seca (IMS, conversão alimentar (CA, eficiência alimentar (EA e consumo alimentar residual (CAR de tourinhos da raça Nelore Mocho em prova de desempenho animal (PDA. Foram utilizados 30 animais, inteiros, com idade inicial de 243,6±30,4 dias. Alimentos e sobras individuais foram quantificados diariamente. A classificação baseou-se no índice de prova de desempenho animal (IPDA. Para CAR não houve diferença (p > 0,05 entre a média dos grupos. As variáveis peso e GPD não foram correlacionadas com CAR. Houve alta correlação entre CAR e CA. EA e CA apresentaram correlação com CAR. O IPDA apresentou alta correlação com a IMS (r = 0,75. Comparado o CAR médio entre os tourinhos, observou-se que animais menos eficientes apresentaram IMS 27,7% superior aos animais mais eficientes. A variável IPDA não identificou os mais eficientes na utilização de alimentos, pois houve baixas correlações com CA, EA e CAR. Pode-se concluir que a seleção de tourinhos pelo IPDA elege os que ganham mais peso, porém estes apresentam maior IMS. É possível aprimorar a metodologia de seleção com a inclusão do CAR.This study evaluated the characteristics: age, weight, daily weight gain (DWG, dry matter intake (DMI, feed conversion (FC, feed efficiency (FE and residual feed intake (RFI of young bulls of the Polled Nellore breed in a performance test. Thirty bulls, with initial age of 243.6±30.4 days were used. Dry Matter Intake (DMI was quantified daily for each animal. The animals were classified by the performance test index (PTI. RFI did not show differences (p > 0.05 among the averages of the groups. The variables weight and DWG were not correlated with RFI. There was high correlation between RFI and FC. FE and FC showed correlation with RFI. The PTI showed high correlation with DMI (r = 0.75. When comparing mean RFI among the bulls, it was

  13. The effect of variable discharge on the inorganic chemistry downstream of a waste water treatment plant, Boulder Creek, Colorado

    Science.gov (United States)

    Antweiler, R. C.; Writer, J. H.; Murphy, S. F.

    2012-12-01

    Researchers investigating the effect of wastewater treatment plant (WWTP) effluent on streams often assume that the magnitude of this effect is constant over time. However, discharge of WWTP effluent frequently follows a distinctive diel pattern. WWTP effluent discharge into Boulder Creek, Colorado, for example, varies by almost 200% over the course of a day. Due to this variation, downstream concentrations of chloride, boron and gadolinium (commonly used "conservative tracers") exhibit major changes over a 24-hour period. In order to determine how effluent discharge variability affects stream chemistry, we performed an evaluation of discharge and inorganic chemistry of the City of Boulder's WWTP and Boulder Creek upstream and downstream of the WWTP (representing a 5.4-km reach). Sodium bromide and Rhodamine WT were used to confirm that the same parcel of water was sampled as it moved downstream. The behavior of inorganic constituents fell into three distinct categories, showing conservative behavior, in-stream loss, or in-stream gain. Accounting for variable effluent discharge, the following inorganic constituents behaved conservatively: Cl, SO4, HCO3, F, B, Ba, Ca, Gd, K, Mg, Rb, Co, Cu, Mo, NO3, P and PO4, Sb, SiO2, Sr and Zn. Inorganic compounds which showed evidence of in-stream loss were Bi, Cr, Cs, Ga, Ge, Hg, Se, and Sn. For these elements, the typical pattern was an almost immediate loss: by the time the water had traveled to the first downstream sampling site, 2.3-km below the WWTP, in-stream reactions appeared to have ceased, and a constant flux was observed at all subsequent sites. We speculate that the near-immediate rates represent precipitation and/or adsorption caused by the change in pH and temperature of the mixing zone. Inorganic constituents that showed evidence of in-stream gain were: Al, As, Cd, Fe, I, Li, Mn, Nb, Pb, Re, Th, U, V, W, and all the rare-earth elements (except Gd). As with the in-stream loss group, most of the reactions occurred

  14. Dieta y ecomorfología de la ictiofauna del arroyo Manantiales, provincia de Buenos Aires, Argentina Diet and ecomorphology of the ichthyofauna of Manantiales stream, Buenos Aires province, Argentina

    OpenAIRE

    Eduardo M Fernández; Ricardo A Ferriz; Cristina A Bentos; Guillermo R. López

    2012-01-01

    Se estudio la correlación entre dieta y morfología de 19 especies de peces del arroyo Manantiales, cabecera del río samborombón, provincia de Buenos Aires, Argentina. Las especies fueron clasificadas en cuatro grupos tróficos: carnívoros, omnívoros, insectívoros y detritívoros- alguívoros. Se analizaron 12 atributos ecomor-fológicos relacionados con el uso del hábitat y la alimentación con el fin de distinguir patrones ecomorfológicos de las especies y de las especies con el alimento consumid...

  15. Geoquímica de ríos de montaña en las Sierras Pampeanas: I. Vertientes y arroyos del batolito de Achala, provincia de Córdoba, Argentina

    OpenAIRE

    A. I. Pasquini; L. B. Grosso; A. P. Mangeaud; P. J. Depetris

    2002-01-01

    Se analiza la composición química de vertientes y arroyos de altura (>1100 m s.n.m.) sobre el batolito de Achala en las Sierras Pampeanas de Córdoba, donde la litología dominante es un monzogranito porfírico. El agua tiene una composición mayoritaria bicarbonatada/sódico-potásica a cálcica. La concentración de los elementos disueltos tiene un orden de magnitud entre 10³ y 10(7) veces inferior a la corteza continental superior y al granito dominante. La concentración de los elementos químicos ...

  16. Características del permafrost costero (criopeg con el uso de técnicas geoeléctricas, arroyo Díaz, isla Marambio, península Antártica

    Directory of Open Access Journals (Sweden)

    Adrián Silva Busso

    2013-12-01

    Full Text Available En las áreas costeras del norte de la península Antártica el permafrost suele poseer contenidos diferentes de hielo e incluso ausencia del mismo intercalando aguas dulces, salobres y salinas. Estos horizontes pueden estar estratificados entre sí con niveles que contienen hielo en diferente proporción. Esta zona particular del permafrost costero se conoce como criopeg y da lugar a un contraste resistivo natural que facilita el estudio de los procesos geocriológicos e hidrogeológicos mediante el uso de métodos geoeléctricos 1D y 2D, que pueden ser interpretados en conjunto con el análisis de ciertos parámetros de la dinámica costera. Se ha elegido como zona de estudio la costa de la bahía López de Bertodano, entre la desembocadura del arroyo Díaz y cabo Bodman en la isla Marambio. La misma es una costa dominada por mareas de hasta dos metros de amplitud donde predomina el material limos arcilloso proveniente de la erosión de los afloramientos de la isla. Las sondeos geoeléctricos estudiados permiten observar niveles resistivos superficiales de la capa activa con valores que oscilan entre 45- 75 ohm.m en zonas donde no ingresa la marea y valores entre 8 - 15 ohm.m en las zonas intermareales. Los mismos son muy discontinuos arealmente y en profundidad, al menos en los primeros 30 metros, y en superficie coinciden con los sectores intermareales y los valores resistivos más elevados se encuentran a mayor profundidad. Una interpretación posible es el efecto de la infiltración de agua salina del mar y su posterior mezcla con el hielo del permafrost coincidentemente en una zona de discontinuidad geológica como lo es el arroyo Díaz.

  17. High Spatial Resolution 40Ar/39Ar Geochronology of Impact Melt Breccias from Apollo 17 Boulders at Stations 2, 6, and 7

    Science.gov (United States)

    Mercer, C. M.; Hodges, K. V.; Jolliff, B. L.; Van Soest, M. C.; Wartho, J. A.; Weirich, J. R.

    2015-12-01

    Several boulders located at the bases of the North and South Massifs were among the primary field targets of the Apollo 17 mission to the Taurus-Littrow Valley on the Moon [1]. Some boulders are polylithologic, including Boulder 1 at Station 2 and the boulders at Stations 6 and 7. These boulders were the subjects of consortium studies [2, 3] that included 40Ar/39Ar geochronology to determine the ages of distinct lithologies within each boulder [e.g., 4-6]. We report new 40Ar/39Ar data for the impact melt breccias 72255, 76315, 77075, and 77135 obtained using the UV laser ablation microprobe (UVLAMP) methods of [7]. For 72255, we obtained a preliminary isochron date ca. 3814 Ma from 22 melt analyses, which is younger than published plateau dates (e.g., 3951-3835 Ma [4, 8]). Fifteen melt analyses of 76315 yield a preliminary isochron date ca. 3850 Ma, younger than the 3900 ± 16 Ma date reported by [8]. Melt analyses of 77075 yield preliminary dates between ca. 3797-3584 Ma, possibly reflecting partial loss of 40Ar. In this case, the oldest date may provide a minimum age for the formation of melt in 77075. Finally, the UVLAMP dates for the 77135 melt range from 3810-3361 Ma and corresponding Ca/K ratios range from ca. 100-6. Electron microprobe analyses of small (ca. 10s of microns wide) pockets of K-rich materials show that both K-rich glass and K-feldspar are present. The UVLAMP dates for 77135 likely reflect spatially variable 40Ar loss, consistent with published step heating results [e.g., 6]. References: [1] Schmitt (1973) Science, 182, 681-690. [2] Ryder (1993). Catalog of Apollo 17 Rocks: Volume 1 - Stations 2 and 3 (South Massif). LPI. [3] Ryder (1993). Catalog of Apollo 17 Rocks: Volume 4 - North Massif. LPI. [4] Leich et al. (1975) The Moon, 14, 407-444. [5] Cadogan & Turner (1976). LPSC, 7, 2267-2285. [6] Stettler et al. (1978). LPSC, 9, 1113-1115. [7] Mercer et al. (2015) Sci. Adv., 1, e1400050. [8] Dalrymple & Ryder (1996). JGR, 101, 26069-26084.

  18. Flash Flood Risks and Warning Decisions: A Mental Models Study of Forecasters, Public Officials, and Media Broadcasters in Boulder, Colorado.

    Science.gov (United States)

    Morss, Rebecca E; Demuth, Julie L; Bostrom, Ann; Lazo, Jeffrey K; Lazrus, Heather

    2015-11-01

    Timely warning communication and decision making are critical for reducing harm from flash flooding. To help understand and improve extreme weather risk communication and management, this study uses a mental models research approach to investigate the flash flood warning system and its risk decision context. Data were collected in the Boulder, Colorado area from mental models interviews with forecasters, public officials, and media broadcasters, who each make important interacting decisions in the warning system, and from a group modeling session with forecasters. Analysis of the data informed development of a decision-focused model of the flash flood warning system that integrates the professionals' perspectives. Comparative analysis of individual and group data with this model characterizes how these professionals conceptualize flash flood risks and associated uncertainty; create and disseminate flash flood warning information; and perceive how warning information is (and should be) used in their own and others' decisions. The analysis indicates that warning system functioning would benefit from professionals developing a clearer, shared understanding of flash flood risks and the warning system, across their areas of expertise and job roles. Given the challenges in risk communication and decision making for complex, rapidly evolving hazards such as flash floods, another priority is development of improved warning content to help members of the public protect themselves when needed. Also important is professional communication with members of the public about allocation of responsibilities for managing flash flood risks, as well as improved system-wide management of uncertainty in decisions. PMID:25988286

  19. Distribution and stability of potential salmonid spawning gravels in steep boulder-bed streams of the eastern Sierra Nevada

    International Nuclear Information System (INIS)

    Interest in small hydroelectric development (< 5 MW) has recently focused attention on steep streams and the resident trout populations they contain. High-gradient boulder-bed streams have been the sites of relatively few studies of salmonid spawning habitat, although they have geomorphic and hydraulic characteristics - and therefore gravel distributions - that are quite different from the more commonly described lower-gradient channels. The authors documented gravel distribution in seven high-gradient stream reaches in the eastern Sierra Nevada. Gravels occurred only in locations characterized by relatively low shear stress; they formed small pockets in sites of low divergence and larger deposits upstream of natural hydraulic controls. In 1986 (a wet year), all tracer gravels placed in gravel pockets at nine sites on four streams were completely swept away, and substantial scour, fill, and other channel changes occurred at many sites. In 1987 (a dry year), tracer gravels and the channel cross sections were generally stable. Periodic mobility of gravel may explain why brown trout Salmo trutta are more abundant than rainbow trout Oncorhychus mykiss in the study reaches, where high flows occur every May and June during snowmelt. Brown trout are fall spawners, and their fry emerge long before the high snowmelt flows, whereas rainbow trout are spring spawners whose eggs are in the gravel, and thus vulnerable to scour, during snowmelt flows

  20. Health hazard evaluation report HETA 86-157-1678, Stag Dental Clinic, Boulder, Colorado. [Nitrous oxide exposure

    Energy Technology Data Exchange (ETDEWEB)

    Gunter, B.J.

    1986-03-01

    Employees of the Stag Dental Clinic, Boulder, Colorado requested an evaluation of nitrous oxide exposure during dental procedures. Direct reading measurements taken in the dental operatory immediately after nitrous oxide was administered showed levels exceeding 1000 parts per million (ppm) in the breathing zone of the dentist and his assistant. The levels remained high throughout the 1-hour procedure. The level of nitrous oxide in the hallway outside the operatory was 300 ppm and that in the adjacent operatory, 150 ppm (background). General-room air in the operatory in use was 800 ppm nitrous oxide. Levels of nitrous oxide decreased to 50 ppm 1.5 hours after the gas was turned off. The current NIOSH recommended time weighted average is 25 ppm. The author concludes that a health hazard existed at the dental office due to high exposures of nitrous oxide. It was recommended that a scavenging system should be installed. Recommendations also include routine maintenance on anesthetic and suction equipment, a follow-up evaluation after the exhaust systems have been in place, advising all dentists and other personnel in the clinic of the adverse health effects due to nitrous oxide, and use of more dilution ventilation.

  1. Effects of Controllable Blasting Variables on Number of Boulders Generated after Blasting in Ratcon and NSCE Quarries, Ibadan, Oyo State, Nigeria

    OpenAIRE

    Abiodun Ismail LAWAL; Akande Jide Muili

    2013-01-01

    The research work examines the effects of controllable blasting variables on number of boulders generated after blasting. The objective of the research was achieved through collection of data related to blasting which are drill hole depth, drill hole diameter, burden, spacing, average charge per hole, and specific charge. The collected data were analysed statistically using both Microsoft Excel Software and SPSS Software. The result of the analysis reveals that all the input controllable blas...

  2. Stable isotopic records of bleaching and endolithic algae blooms in the skeleton of the boulder forming coral Montastraea faveolata

    OpenAIRE

    Hartmann, A.C.; Carilli, J. E.; Norris, R. D.; Charles, C. D.; Deheyn, D. D.

    2010-01-01

    Within boulder forming corals, fixation of dissolved inorganic carbon is performed by symbiotic dinoflagellates within the coral tissue and, to a lesser extent, endolithic algae within the coral skeleton. Endolithic algae produce distinctive green bands in the coral skeleton, and their origin may be related to periods of coral bleaching due to complete loss of dinoflagellate symbionts or ‘‘paling’’ in which symbiont populations are patchily reduced in coral tissue. Stable carbon isotopes were...

  3. Geomorphology and weathering characteristics of erratic boulder trains on Tierra del Fuego, southernmost South America: Implications for dating of glacial deposits

    Science.gov (United States)

    Darvill, Christopher M.; Bentley, Michael J.; Stokes, Chris R.

    2015-01-01

    Erratic boulder trains (EBTs) are a useful glacial geomorphological feature because they reveal former ice flow trajectories and can be targeted for cosmogenic nuclide exposure dating. However, understanding how they are transported and deposited is important because this has implications for palaeoglaciological reconstructions and the pre-exposure and/or erosion of the boulders. In this study, we review previous work on EBTs, which indicates that they may form subglacially or supraglacially but that large angular boulders transported long distances generally reflect supraglacial transport. We then report detailed observations of EBTs from Tierra del Fuego, southernmost South America, where their characteristics provide a useful framework for the interpretation of previously published cosmogenic nuclide exposure dates. We present the first comprehensive map of the EBTs and analyse their spatial distribution, size, and physical appearance. Results suggest that they were produced by one or more supraglacial rock avalanches in the Cordillera Darwin and were then transported supraglacially for 100 s of kilometres before being deposited. Rock surface weathering analysis shows no significant difference in the weathering characteristics of a sequence of EBTs, previously hypothesized to be of significantly different age (i.e., different glacial cycles). We interpret this to indicate that the EBTs are much closer in age than previous work has implied. This emphasises the importance of understanding EBT formation when using them for cosmogenic nuclide exposure dating.

  4. Effects of Controllable Blasting Variables on Number of Boulders Generated after Blasting in Ratcon and NSCE Quarries, Ibadan, Oyo State, Nigeria

    Directory of Open Access Journals (Sweden)

    Abiodun Ismail LAWAL

    2013-03-01

    Full Text Available The research work examines the effects of controllable blasting variables on number of boulders generated after blasting. The objective of the research was achieved through collection of data related to blasting which are drill hole depth, drill hole diameter, burden, spacing, average charge per hole, and specific charge. The collected data were analysed statistically using both Microsoft Excel Software and SPSS Software. The result of the analysis reveals that all the input controllable blasting variables which are drill hole diameter (X1, drill hole depth (X2, hole spacing (X3, burden (X4, average charge per hole (X5, specific charge(X6 that participated as independent variables in the models are found to be significant and the R2 values obtained from the graph show a very strong correlation between the number of boulders generated after blasting and the input variables except that of drill hole diameter which shows a very weak correlation. The equation generated using the SPSS could be used to determine number of boulders generated after blasting.

  5. Trends and variability of midlatitude stratospheric water vapour deduced from the re-evaluated Boulder balloon series and HALOE

    Directory of Open Access Journals (Sweden)

    M. Scherer

    2008-03-01

    Full Text Available This paper presents an updated trend analysis of water vapour in the lower midlatitude stratosphere from the Boulder balloon-borne NOAA frostpoint hygrometer measurements and from the Halogen Occulation Experiment (HALOE. Two corrections for instrumental bias are applied to homogenise the frostpoint data series, and a quality assessment of all soundings after 1991 is presented. Linear trend estimates based on the corrected data for the period 1980–2000 are up to 40% lower than previously reported. Vertically resolved trends and variability are calculated with a multi regression analysis including the quasi-biennal oscillation and equivalent latitude as explanatory variables. In the range of 380 to 640 K potential temperature (≈14 to 25 km, the frostpoint data from 1981 to 2006 show positive linear trends between 0.3±0.3 and 0.7±0.1%/yr. The same dataset shows trends between −0.2±0.3 and 1.0±0.3%/yr for the period 1992 to 2005. HALOE data over the same time period suggest negative trends ranging from −1.1±0.2 to −0.1±0.1%/yr. In the lower stratosphere, a rapid drop of water vapour is observed in 2000/2001 with little change since. At higher altitudes, the transition is more gradual, with slowly decreasing concentrations between 2001 and 2007. This pattern is consistent with a change induced by a drop of water concentrations at entry into the stratosphere. Previously noted differences in trends and variability between frostpoint and HALOE remain for the homogenised data. Due to uncertainties in reanalysis temperatures and stratospheric transport combined with uncertainties in observations, no quantitative inference about changes of water entering the stratosphere in the tropics could be made with the mid latitude measurements analysed here.

  6. Comparison of modeled NmE with NmE measured by the Boulder ionosonde near the spring equinox.

    Science.gov (United States)

    Pavlov, Anatoli; Pavlova, Nadezhda

    We present a comparison of the E-layer peak electron number densities, NmE, measured by the Boulder ionosonde during geomagnetically quiet conditions on 10 April 1996 at low solar activity, 2 April 1993 and 9 April 1978 during moderate solar activity conditions, and 10 April 1991 at high solar activity with numerical theoretical model calculations of NmE. Based on this comparison, the modified EUVAC model solar flux is necessary to increase by a factor of 2 at moderate and high solar activity in the wavelength range of 3.2-7.0 nm. If O (+) ( (4) S), O (+) ( (2) D), O (+) ( (2) P), and N (+) ions are not calculated, the value of NmE is decreased up to a factor of 1.12 at solar minimum and up to a factor of 1.23 for the moderate and high solar activity conditions. The production of N _{2} (+) ions by photoelectron-impact ionization of N _{2} increases the value of NmE up to a factor of 1.18 at low solar activity and up to a factor of 1.33 for the moderate and high solar activity levels. The increase in NmE due to the production of O _{2} (+) ions by photoelectron-impact ionization of O _{2} does not exceed 4 percent. A difference between the calculated electron, T _{e}, and neutral, T _{n}, temperatures is less than 1, 4, 20, 70, and 145 K at 105, 110, 120, 130, and 140 km altitude, respectively. Changes in NmE caused by this difference between T _{e} and T _{n} are negligible.

  7. Comparison of NmE measured by the boulder ionosonde with model predictions near the spring equinox

    Science.gov (United States)

    Pavlov, A. V.; Pavlova, N. M.

    2013-09-01

    We present a comparison of the E-layer peak electron number densities, NmE, measured by the Boulder ionosonde during geomagnetically quiet conditions on 10 April 1996 at low solar activity, 2 April 1993 and 9 April 1978 during moderate solar activity conditions, and 10 April 1991 at high solar activity with numerical theoretical model calculations of NmE. Based on this comparison, the EUVAC model solar flux is necessary to increase by a factor of 2 at moderate and high solar activity in the wavelength range of 3.2-7.0 nm. If O+(4S), O+(2D), O+(2P), and N+ ions are not calculated, the value of NmE is decreased up to a factor of 1.12 at solar minimum and up to a factor of 1.23 for the moderate and high solar activity conditions. The production of N2+ ions by photoelectron-impact ionization of N2 increases the value of NmE up to a factor of 1.18 at low solar activity and up to a factor of 1.33 for the moderate and high solar activity levels. The increase in NmE due to the production of O2+ ions by photoelectron-impact ionization of O2 does not exceed 4%. A difference between the calculated electron, Te, and neutral, Tn, temperatures is less than 1, 4, 20, 70, and 145 K at 105, 110, 120, 130, and 140 km altitude, respectively. Changes in NmE caused by this difference between Te and Tn are negligible.

  8. Periglacial Slope Deposits and Saprolites Controlling Water Discharge. Examples From the Bavarian Forest, Germany and Boulder Creek (CZO), Colorado, USA

    Science.gov (United States)

    Huber, J.; Huerkamp, K.; Voelkel, J.; Leopold, M.

    2008-12-01

    investigations in the Colorado Front Range at Boulder.

  9. Valoración del impacto de efluentes minero industriales del carbón en el arroyo San José de Río Turbio en Santa Cruz

    Directory of Open Access Journals (Sweden)

    Alba Lucia Caballero

    2014-06-01

    Full Text Available Los efluentes descargados al arroyo San José de Río Turbio al sudoeste de la provincia de Santa Cruz (República Argentina quedaron caracterizados mediante un análisis estadístico multivariado realizado con parámetros fisicoquímicos determinados sobre ellos (Caballero A. Dicho análisis permitió su diferenciación cualitativa y la identificación de los aportes que ocasiona cada uno de ellos. En éste trabajo se ha procedido en primer lugar a determinar la calidad de los vertidos y del agua del arroyo a partir de una escala de valoración. Dicha escala se confeccionó usando las conclusiones del análisis estadístico mencionado y la comparación de los valores obtenidos con los límites máximos de vuelco establecidos para la provincia de Santa Cruz (ley N° 2658, los Niveles guía argentinos de calidad de agua ambiente y los Niveles guía de la ley de protección Ambiental Nº 24585 (Código de minería argentino. Finalmente para valorar el impacto ocasionado por los efluentes minero industriales, se tomó en consideración además de la calidad, otros factores relevantes tales como caudal, tipo de vertido, intermitencia y peligrosidad; adoptando un modelo matemático particular que permitió asignar un puntaje asociado a una escala cualitativa. Como conclusión se pudo determinar mediante una metodología científica que el impacto ocasionado por las descargas minero industrial de carbón al curso de agua varía en un rango de alto a muy alto y esta determinada principalmente por aquellas provenientes de la planta depuradora de carbón y la central térmica.

  10. Estimación de crecidas extraordinarias en el arroyo Tegua (Córdoba, a partir de evidencias geomorfológicas, sedimentológicas y modelación hidráulica

    Directory of Open Access Journals (Sweden)

    Nelso C Doffo

    2014-03-01

    Full Text Available El arroyo Tegua drena una cuenca de 160.000 ha en el centro-oeste de la provincia de Córdoba, nace en las Sierras de Comechingones (Sierras Pampeanas y desarrolla su cuenca media y baja en la llanura Pampeana. El clima regional es templado subhúmedo (PMA=800-930 mm. Con un largo historial de afectaciones a infraestructuras y tierras productivas, el curso carece de registros de aforos, lo que dificulta la evaluación de crecidas históricas. Por ello las técnicas geomorfológicas-sedimentológicas y la modelización geomorfológicas, constituyen una metodología útil para estimar crecidas extraordinarias. Se propone reconocer evidencias geomorfológicos-sedimentológicas de crecidas, determinar tramos del arroyo para la modelización hidráulica y estimar caudales máximos y su relación con desastres aluviales. Para la estimación de la descarga se utilizó el programa HEC-RAS 4.0. Se seleccionó un segmento del canal de 700 m de longitud, en la cuenca media, con un patrón subrectilíneo, estable y con una pendiente de 0,0025. Se encontraron evidencias sedimentarias y no sedimentarias de crecida y se relevaron 17 perfiles transversales. Se determinó un coeficiente de rugosidad "n" de Manning para el fondo del canal de 0,0204 en forma analítica y otro para las márgenes de 0,06 extraído de tablas. Se determinaron caudales de 55, 115, 140 y 200 m3/s, cuyas láminas de crecida son coincidentes con las evidencias relevadas. La incisión del cauce en sedimentos cementados ha estabilizado notablemente el canal, posibilitando su modelización hidráulica. Una crecida importante (2007 fue asociada con las evidencias no sedimentarias relevadas y un caudal estimado de 200 m³/s.

  11. Investigaciones arqueológicas en la cuenca superior del Arroyo Tapalqué: Un modelo de ocupación humana para el centro de la subregión Pampa Húmeda durante el Holoceno tardío Archaeological research in the upper basin of Arroyo Tapalqué: model of human occupation for the center of the Pampa Húmeda sub-region during the late Holocene

    Directory of Open Access Journals (Sweden)

    Pablo Gerónimo Messineo

    2011-12-01

    Full Text Available En este trabajo se resumen las evidencias arqueológicas generadas para los sitios localizados en los diversos ambientes de la cuenca superior del arroyo Tapalqué. Se discute un modelo de ocupación humana para la cuenca durante el Holoceno tardío (3500-500 años AP, haciendo hincapié en las estrategias de explotación de los recursos faunísticos, la organización tecnológica y los patrones de movilidad, asentamiento y uso del espacio. Los resultados alcanzados en el presente proyecto son coincidentes con la evidencia registrada para otras áreas de la región pampeana, donde se observa un componente collector, una menor movilidad residencial y una mayor movilidad logística para acceder a recursos específicos. En cuanto a la subsistencia, estuvo basada principalmente en la explotación del guanaco, mientras que para algunos de los recursos líticos locales se empleó una estrategia tecnológica expeditiva. El surgimiento de comportamientos territoriales en el Holoceno tardío de la región provocó que los grupos intensificaran las relaciones intergrupales para acceder a recursos no disponibles localmente. En síntesis, las investigaciones en la cuenca aumentaron la evidencia disponible para el centro de la subregión Pampa Húmeda, lo cual permite sistematizar la información y generar modelos como los que aquí se presentan.In this paper, the archaeological evidence from sites located in diverse environments in the upper basin of arroyo Tapalqué is summarized. The main aim is to discuss a model of human occupation for this basin during the late Holocene (3500-500 years BP, emphasizing strategies of faunal exploitation, technological organization, and patterns of mobility, settlement, and utilization of space. The results obtained in this project concur with the evidence recorded for other areas of the Pampean region, where a collector component, lower residential mobility and access to specific resources through high logistic mobility

  12. Lagrangian sampling of wastewater treatment plant effluent in Boulder Creek, Colorado, and Fourmile Creek, Iowa, during the summer of 2003 and spring of 2005--Hydrological and chemical data

    Science.gov (United States)

    Barber, Larry B.; Keefe, Steffanie H.; Kolpin, Dana W.; Schnoebelen, Douglas J.; Flynn, Jennifer L.; Brown, Gregory K.; Furlong, Edward T.; Glassmeyer, Susan T.; Gray, James L.; Meyer, Michael T.; Sandstrom, Mark W.; Taylor, Howard E.; Zaugg, Steven D.

    2011-01-01

    This report presents methods and data for a Lagrangian sampling investigation into chemical loading and in-stream attenuation of inorganic and organic contaminants in two wastewater treatment-plant effluent-dominated streams: Boulder Creek, Colorado, and Fourmile Creek, Iowa. Water-quality sampling was timed to coincide with low-flow conditions when dilution of the wastewater treatment-plant effluent by stream water was at a minimum. Sample-collection times corresponded to estimated travel times (based on tracer tests) to allow the same "parcel" of water to reach downstream sampling locations. The water-quality data are linked directly to stream discharge using flow- and depth-integrated composite sampling protocols. A range of chemical analyses was made for nutrients, carbon, major elements, trace elements, biological components, acidic and neutral organic wastewater compounds, antibiotic compounds, pharmaceutical compounds, steroid and steroidal-hormone compounds, and pesticide compounds. Physical measurements were made for field conditions, stream discharge, and time-of-travel studies. Two Lagrangian water samplings were conducted in each stream, one in the summer of 2003 and the other in the spring of 2005. Water samples were collected from five sites in Boulder Creek: upstream from the wastewater treatment plant, the treatment-plant effluent, and three downstream sites. Fourmile Creek had seven sampling sites: upstream from the wastewater treatment plant, the treatment-plant effluent, four downstream sites, and a tributary. At each site, stream discharge was measured, and equal width-integrated composite water samples were collected and split for subsequent chemical, physical, and biological analyses. During the summer of 2003 sampling, Boulder Creek downstream from the wastewater treatment plant consisted of 36 percent effluent, and Fourmile Creek downstream from the respective wastewater treatment plant was 81 percent effluent. During the spring of 2005

  13. El arte rupestre esquemático del Arroyo Barbaón (Parque Nacional de Monfragüe, Cáceres: contextualización arqueológica y caracterización de pigmentos

    Directory of Open Access Journals (Sweden)

    Hipólito COLLADO GIRALDO

    2015-01-01

    Full Text Available El Parque Nacional de Monfragüe (Cáceres conserva un importante complejo de arte rupestre formado por más de un centenar de abrigos con pinturas y grabados postpaleolíticos. En el presente trabajo vamos a dar a conocer un avance de las conclusiones obtenidas en las últimas campañas de investigación llevadas a cabo en el sector del cañón del Arroyo Barbaón (Serradilla. En él se ha procedido a la documentación digital de las representaciones pictográficas de sus 29 abrigos. Además, a través de las excavaciones realizadas en el interior de la Cueva del Sapo, que han proporcionado diversos materiales cerámicos y líticos, así como los restos de un hogar, se intenta contextualizar arqueológicamente el conjunto de arte rupestre. Finalmente, el hallazgo en el abrigo Friso del Terror de un fragmento de cuarcita desprendido que conservaba algunos trazos pintados ha permitido realizar análisis para caracterizar el pigmento que fue utilizado en su elaboración. Con estas aportaciones pretendemos una aproximación más precisa a cuestiones como las técnicas de realización, cronología y funcionalidad de la pintura esquemática en este espacio natural cacereño.

  14. Transformaciones territoriales en áreas de riesgo de inundación. El caso del Arroyo El Gato. Partido de La Plata. Período 1980-2004

    Directory of Open Access Journals (Sweden)

    Mirela Benítez

    2007-01-01

    Full Text Available El presente trabajo tiene como objetivo realizar el estudio de los cambios territoriales a partir de la evolución en los usos de suelo, la estructura morfológica urbana y aspectos socio-económicos de la población en uno de los asentamientos poblacionales situados en las márgenes del Arroyo El Gato. El mismo se llevará a cabo a partir de la implementación de la teledetección, análisis de datos estadísticos y encuestas. El estudio de las transformaciones territoriales nos ayudará a abordar en una primera aproximación las dimensiones de peligrosidad y exposición enmarcadas en la teoría social del riesgo. Este análisis servirá como insumo para la determinación de áreas de riesgo de inundación que se está desarrollando dentro del proyecto "Inundaciones en la Provincia de Buenos Aires. Factores naturales y antrópicos desde la Teoría Social del Riesgo. Cuenca Parano-Platense. 1980-2000".

  15. 中深孔爆破大块产生的原因分析及降低大块率的技术措施%Analysis on Causes of Producing Boulder in Medium-length Hole Blasting and the Technical Measures for Redueine Boulder Yield

    Institute of Scientific and Technical Information of China (English)

    耿贵刚; 池恩安; 刘凤钱

    2011-01-01

    In medium - length hole blasting, fragment size is affected primarily not only by terrain landform, physical properties of rock,but also by borehole pattern parameters and unit explo- sive consumption. For ecumenical blasting design and working, boulder yield is very big because of the fixed borehole pattern parameters and unit explosive consumption for a certain blasting area. This paper analyzed the reasons of producing boulder, and presents technical measures to reduce boulder yield, such as dynamically adjusting borehole pattern parameters, unit explosive consumption and charge density.%在中深孔爆破工程中,影响爆破块度的主要因素既有爆破区域的地形地貌、岩石的物理特性,还有爆破孔网参数、炸药单耗的选取等,而在一般的爆破技术设计和施工中,由于针对某一爆破区域的爆破孔网参数和炸药单耗是固定的,爆破后大块率较高。分析了大块产生的原因,提出在设计和施工中动态调整爆破孔网参数、炸药单耗、装药密度以降低大块率的技术措施。

  16. Characterizing aquatic health using salmonid mortality, physiology, and biomass estimates in streams with elevated concentrations of arsenic, cadmium, copper, lead, and zinc in the Boulder River Watershed, Montana

    Science.gov (United States)

    Farag, A.M.; Skaar, D.; Nimick, D.A.; MacConnell, E.; Hogstrand, C.

    2003-01-01

    Abandoned tailings and mine adits are located throughout the Boulder River watershed in Montana. In this watershed, all species of fish are absent from some tributary reaches near mine sources: however, populations of brook trout Salvelinus fontitalis, rainbow trout Oncorhynchus mykiss, and cut-throat trout O. clarki are found further downstream. Multiple methods must be used to investigate the effects of metals released by past mining activity because the effects on aquatic life may range in severity, depending on the proximity of mine sources. Therefore, we used three types of effects - those on fish population levels (as measured by survival), those on biomass and density, and those at the level of the individual (as measured by increases in metallothionein, products of lipid peroxidation, and increases in concentrations of tissue metals) - to assess the aquatic health of the Boulder River watershed. Elevated concentrations of Cd, Cu, and Zn in the water column were associated with increased mortality of trout at sites located near mine waste sources. The hypertrophy (swelling), degeneration (dying), and necrosis of epithelial cells observed in the gills support our conclusion that the cause of death was related to metals in the water column. At a site further downstream (lower Cataract Creek), we observed impaired health of resident trout, as well as effects on biomass and density (measured as decreases in the kilograms of trout per hectare and the number per 300 m) and effects at the individual level, including increases in metallothionein, products of lipid peroxidation, and tissue concentrations of metals.

  17. Pueden los cambios tecnológicos basados en el análisis costo-beneficio cumplir con las metas de la sustentabilidad? Análisis de un caso de la Región de Tres Arroyos. Argentina.

    OpenAIRE

    Flores, Claudia C.; Sarandón, Santiago J.

    2008-01-01

    En la agricultura actual, los cambios tecnológicos son determinados según su conveniencia económica, analizada mediante el análisis costo beneficio, el cual no permite tener en cuenta los costos ecológicos asociados a la utilización de las nuevas tecnologías. En la década del ’90, en la Región de Tres Arroyos, se ha observado un importante incremento en el uso de fertilizantes, debido a un análisis costo beneficio conveniente. Para analizar las consecuencias de esos cambios sobre la sustentab...

  18. Dinámica geomorfológica de la desembocadura del Arroyo Pando, Uruguay. Geografía histórica y SIG, análisis de tendencias naturales y efectos antrópicos sobre sistemas dinámicos

    OpenAIRE

    Gutiérrez, Ofelia; Panario, Daniel

    2012-01-01

    La desembocadura de redes de drenaje en playas arenosas son ambientes muy dinámicos y particularmente sensibles a perturbaciones de origen antrópico; en el presente estudio de caso se analizan las relaciones entre las diversas intervenciones producidas, tanto a nivel de la cuenca del Arroyo Pando, Uruguay, como en las playas aledañas y las dunas costeras, y las modificaciones observadas a través de una serie de imágenes y cartografía digital, manejadas con un encare metodológic...

  19. Reconocimiento de la zona no-saturada y características ambientales del acuífero freático en la cuenca de los arroyos Martín-Carnaval, provincia de Buenos Aires, Argentina : Metodología

    OpenAIRE

    Hernández, Mario Alberto; Ruíz de Galarreta, Víctor Alejandro; Minghinelli, Leonardo F.

    1994-01-01

    Se expone la metodología utilizada para el reconocimiento de las características hidrodinámicas de la ZNS y acuífero freático en la cuenca de los arroyos Martín-Carnaval y la determinación de características de implicancia ambiental. Sobre la base de la elección de tres áreas representativas de diferentes condiciones se instalan sendas estaciones de registración mediante sensores pluviográficos, termográficos, freatigráficos, tensiométricos (tensión matricial), de contenido de humedad (sondaj...

  20. Arroyo Limay chico: un ejemplo de captura fluvial en la cuenca superior del Río Limay (SE de Neuquén Limay Chico stream: an example of fluvial capture in the upper basin of the Limay River (SE of Neuquén

    Directory of Open Access Journals (Sweden)

    Emilio F. González Díaz

    2008-03-01

    Full Text Available Se describe un proceso de captura fluvial, por erosión retrocedente, del arroyo Limay Chico -afluente del río Limay- sobre el sector austral de las cabeceras de la cuenca de drenaje del arroyo Alicurá, tributaria a su vez del río Collón Cura. Se interpreta que la causal del fenómeno estuvo relacionada con las nuevas condiciones climáticas postglaciarias (más húmedas y la contemporánea profundización del troncal río Limay, morfológicamente expresada por modernas terrazas de erosión inferiores, las que fueran reconocidas en la zona de afluencia del arroyo Limay Chico, con anterioridad al llenado del embalse de Alicurá. Además, la captura fluvial y el consecuente desvío de los caudales de un tramo de las nacientes del arroyo Alicurá hacia la cuenca del Limay Chico, mostró condiciones o factores previos coadyuvantes: 1 la disposición topográfica inferior de la cuenca de éste último con respecto a la de Alicurá; 2 la mayor pendiente y la localización del valle del arroyo Limay Chico a lo largo de una zona de debilidad estructural y litológica representada por la falla Limay Chico, asistió la dinámica de la erosión fluvial retrógrada; 3 la disposición transversal de las cabeceras de la cuenca del arroyo Alicurá. Se han reconocido abras de viento e interpretado dos probables codos de captura. El consiguiente aumento de la descarga del arroyo Limay Chico, promovió en su cuenca un fenómeno local de rejuvenecimiento estático. También se acepta una estrecha relación entre el cambio climático postglaciario y la ocurrencia de los múltiples deslizamientos rotacionales observados a lo largo de la abrupta escarpa de falla generada por la falla Limay Chico, presumiéndose que la activa y coetánea erosión lateral del arroyo Limay Chico, contribuyó al proceso gravitacional. Estos deslizamientos, que se caracterizan por la coalescencia lateral de sus muescas de desprendimiento, han generado el distintivo e irregular paisaje

  1. Facies y microfacies de la rampa tithoniana-berriasiana de la cuenca neuquina (Formación Vaca Muerta en la sección del arroyo Loncoche - Malargüe, provincia de Mendoza

    Directory of Open Access Journals (Sweden)

    Diego A. Kietzmann

    2008-12-01

    Full Text Available La Formación Vaca Muerta (Tithoniano-Berriasiano consiste en una alternancia rítmica de lutitas negras, lutitas grises, margas y limolitas, con mudstones, wackestones, packstones, floatstones y rudstones bioclásticos. La asociación de facies en la sección del arroyo Loncoche, permitió definir 12 litofacies y 8 microfacies, dominadas por moluscos, equinodermos, foraminíferos, braquiópodos, serpúlidos y radiolarios. Se distinguieron cuatro asociaciones de facies correspondientes a los subambientes de cuenca, rampa externa (distal y proximal y rampa media. La utilización de la relación Nassellaria/Spumellaria permitió estimar un rango de profundidades menores a 200 metros. El patrón de apilamiento y la distribución vertical de facies permitió la distinción de tres secuencias depositacionales, y el reconocimiento de un sistema tithoniano de rampa homoclinal y un sistema berriasiano de rampa homoclinal de mayor gradiente. La secuencia depositacional 1 consiste en facies de cuenca y rampa externa distal y se caracteriza por un patrón retrogradacional. Presenta un espesor de 124 m, y se extiende desde la Zona de Virgatosphinctes mendozanus hasta la base de la Zona de Corongoceras alternans. Las secuencias depositacionales 2 y 3 consisten en facies de rampa externa y rampa media. Están caracterizadas por un patrón agradacional y progradacional. El espesor de la secuencia 2 es de 66 m y se asigna a la Zona de Corongoceras alternans, mientras que la secuencia 3 alcanza 78 m y corresponde a las zonas de Substeueroceras koeneni y Spiticeras damesi.

  2. Deep crescentic features caused by subglacial boulder point pressure on jointed rock; an example from Virkisjökull, SE Iceland

    Science.gov (United States)

    Krabbendam, M.; Bradwell, T.; Everest, J.

    2012-04-01

    A variety of subglacially formed, erosional crescentic features (e.g. crescentic gouges, lunate fractures) have been widely reported on deglaciated bedrock surfaces. They are characterised by a conchoidal fracture that dips in the same direction as the palaeo-ice flow direction, and a steeper fracture that faces against the ice flow. They are generally interpreted as being formed by point pressure exerted by large boulders entrained in basal ice. They are significant in that they record palaeo-ice flow even if shallower glacial striae are obliterated by post-glacial weathering [1, 2, 3]. This contribution reports on deep scallop-shaped, crescentic depressions observed on abraded surfaces of roche moutonnées and whalebacks recently (depressions at Virkisjökull are cut into smoothed, abraded surfaces festooned with abundant glacial striae. Differences with previously reported crescentic features are: • The scallop-shaped depressions are considerably deeper (5-20 cm); • The steep fracture facing ice flow coincides in all cases with a pre-existing joint that cuts the entire whaleback. The steep joints developed thus before the conchoidal fracture, whilst in reported crescentic features they develop after the conchoidal fracture. We suggest the following formation mechanism. A boulder encased in basal ice exerts continuous pressure on its contact point as it moves across the ice-bedrock contact. This sets up a stress field in the bedrock that does not necessarily exceed the intact rock strength (other crescentic features are rare to absent at Virkisjökull). However, as the stress field migrates (with the transported boulder) and encounters a subvertical, pre-existing joint, stress concentrations build up that do exceed the intact rock strength, resulting in a new (conchoidal) fracture, 'spalling' off a thick, scallop-shaped fragment. The significance of the deep scallop-shaped crescentic depressions is that: • in common with other crescentic features they

  3. Natural and Anthropogenic Controls on the Ecosystem Services Provided by Dissolved Organic Matter: A Case Study of the Boulder Creek Watershed

    Science.gov (United States)

    Gabor, R. S.; McKnight, D. M.

    2011-12-01

    Dissolved organic matter (DOM) performs a number of vital functions in aquatic ecosystems, playing a substantial role in carbon and nitrogen cycles and the bioavailability of metals as well as generally affecting water chemistry. Additionally, it is considered the main cause of the the formation of harmful disinfection byproducts during water treatment processes. Because DOM is vital for ecosystem functioning, but potentially problematic for some direct human uses of water, it proves a complex case study for the application of the ecosystem services framework. To add to the complexity, human behavior can affect the amount and composition of DOM in water. Increasing concentrations of DOM have been observed in many areas of Northern Europe and North America. Hypotheses which have been suggested to explain these increased concentrations include changing land use, thawing peatlands, increased nitrogen deposition, and a lessening of acid rain, a particularly interesting idea because it would be an unintended consequence of a policy designed to protect other ecosystem functions. This multi-year study investigates DOM in the Boulder Creek Watershed in Colorado to better understand seasonal cycling of DOM and the link between DOM in the river and organic matter in the catchment, which is a substantial DOM source. Fluorescence spectroscopy was used to analyze the chemical character of the DOM in an attempt to elucidate the watershed processes driving changes in DOM concentration. Because flow in Boulder Creek is partially controlled by Barker dam and reservoir, this study site provides an opportunity to investigate both natural DOM cycling and the impact of an anthropogenic influence. By better understanding DOM cycling and the ecosystem services it provides, we can better predict how DOM dynamics may shift in the future and be prepared to adjust our behavior and water treatment processes accordingly.

  4. Coral boulders, gravel tongues and sand sheets: Features of coastal accretion and sediment nourishment by Cyclone Tomas (March 2010) on Taveuni Island, Fiji

    Science.gov (United States)

    Etienne, Samuel; Terry, James P.

    2012-11-01

    Tropical Cyclone (TC) Tomas in March 2010 was a category-4 storm that struck the northern and eastern islands of Fiji in the southwest Pacific, with the coast of Taveuni Island in particular experiencing a significant surge and high waves as the eye passed within 30 km. Post-storm field investigations of the coastal geomorphic impacts concentrated on an area in central Taveuni (S16°50' 179°52'W) where protected fringing reefs and coastlines form part of the Bouma National Heritage Park (BNHP). Here, a range of cyclone constructional imprints were found to have supplemented existing coastal sediments. Fresh coral boulders strewn across reef platforms indicate that TC Tomas had sufficient power to deliver new coral blocks, but that this material comprises a relatively minor component (20%) of pre-existing boulder fields. Comparison between the dimensions of fresh (max. 4.9 m3) and older blocks (max. > 40 m3) reveals that unknown earlier events (storms or tsunamis) produced much larger debris, and therefore presumably generated much stronger flow velocities across the fringing reefs than TC Tomas. Analysis of calcarenite slabs quarried from in situ beachrock exposures was particularly useful for calculating storm-surge flow velocities at the shoreline, giving mean values of 3.4 and 1.9 m/s for run-up and backwash, respectively. Several elongate tongues (max. length 75 m) of fresh coral gravel were also constructed perpendicular to the reef crest. A conceptual model of debris accretion based on wave refraction across a crescent-shaped reef front is developed to explain their formation, but which does not rely on the simultaneous existence of a reef-parallel rubble rampart. Overall, the patchy and discontinuous nature of cyclogenic accretionary features across reef, beach and back-beach locations indicates the potential challenges for identification and interpretation of palaeo-cyclone events within the sedimentary record on affected coastlines in the South Pacific

  5. Geoquímica de ríos de montaña en las Sierras Pampeanas: I. Vertientes y arroyos del batolito de Achala, provincia de Córdoba, Argentina

    Directory of Open Access Journals (Sweden)

    A. I. Pasquini

    2002-12-01

    Full Text Available Se analiza la composición química de vertientes y arroyos de altura (>1100 m s.n.m. sobre el batolito de Achala en las Sierras Pampeanas de Córdoba, donde la litología dominante es un monzogranito porfírico. El agua tiene una composición mayoritaria bicarbonatada/sódico-potásica a cálcica. La concentración de los elementos disueltos tiene un orden de magnitud entre 10³ y 10(7 veces inferior a la corteza continental superior y al granito dominante. La concentración de los elementos químicos está vinculada con el grado de movilidad de los mismos bajo condiciones de meteorización incipiente. Los elementos más móviles (alcalinos y alcalinotérreos presentan las concentraciones más elevadas en el agua y en la roca, mientras los más inmóviles (Al, Ga, Ti, Zr, Hf, Th y tierras raras exhiben las más bajas. Ambos grupos de elementos están sujetos a un control litológico significativo. Los metales de transición, tienen solubilidades y concentraciones variables, sugiriendo la existencia de otros controles además del litológico. Los iones mayoritarios evidencian una dilución estival cercana al 60%, mientras que los elementos traza manifiestan un incremento de sus concentraciones por movilización durante el período estival. Las características geológicas de la región, junto con su condición climática semiárida, favorecen el predominio de un régimen de denudación "limitado por la meteorización", donde los procesos de erosión física predominan sobre la meteorización química. Bajo estas condiciones, las características geoquímicas del agua en la región, escasamente afectada por la actividad antrópica, ponen de manifiesto el control que ejercen la litología y el relieve sobre las mismas.

  6. Trophic relationships between macroinvertebrates and fish in a pampean lowland stream (Argentina Relaciones tróficas entre los macroinvertebrados y peces en un arroyo de la llanura pampeana (Argentina

    Directory of Open Access Journals (Sweden)

    María V. López van Oosterom

    2013-03-01

    la estrategia predominante fue de tipo generalista. En general, en los macroinvertebrados, los valores de los isótopos estables confirmaron los resultados obtenidos por el análisis del contenido estomacal. En los peces, los isótopos estables demostraron que ambas especies son depredadores, aunque B. iheringii tiene un comportamiento más omnívoro. Además, el estudio de la alimentación, nos permitió establecer las conexiones tróficas entre los taxa estudiados. La principal fuente de alimento para los macroinvertebrados estudiados fueron el detritus y las diatomeas. En el arroyo La Choza la materia orgánica particulada es una fuente de recursos ilimitada con influencia significativa en toda la comunidad.

  7. Algunos aspectos biológicos de Bryconamericus iheringii (Ostariophysi: Characidae en dos arroyos de la alta cuenca del río Samborombón, Argentina Some aspects of biology of Bryconamericus Iheringii (Ostariophysi: Characidae in two streams in the high basin of the Samborombón river, Argentina

    Directory of Open Access Journals (Sweden)

    Ricardo A. Ferriz

    2010-12-01

    Full Text Available En este estudio se analizó los siguientes aspectos de la estructura poblacional de Bryconamericus iheringii: abundancia, factor de condición, relación machos-hembras, relación largo/peso y período reproductivo. Las muestras fueron tomadas en los arroyos Manantiales y El Portugués entre los meses los meses de mayo de 2004 y abril de 2005 con redes de arrastre. Los mayores valores de biomasa correspondieron a los meses de mayo, julio y marzo para el arroyo Manantiales, mientras que para El Portugués correspondieron a los meses de mayo, septiembre y marzo. En el arroyo Manantiales, tanto para machos como para hembras, el grupo de individuos This study analyzed the following aspects of the Bryconamericus iheringii population structure: abundance patterns, condition factor, male-female sex ratio, relation between weight and length, and reproductive period. Samples were made monthly from May 2004 to April 2005 using small trawling nets, in the Manantiales and El Portugués streams. The highest values of biomass for the Manantiales stream corresponded to May, July and March, the highest values of biomass for El Portugués stream were for May, September and March. In the Manantiales stream, both for males and females, the set of individuals < 25 mm Lst dominated during the spring. Individuals included among the 26-40 mm Lst predominated in the warmer months, while those between 41-60 mm Lst abounded at the end of the summer, autumn and winter. In the Portuguese stream, individuals males < 25 mm Lst, were present in the summer, the rest of the year was dominated by sizes between 26-40 mm Lst during the warmer months. Sizes between 41-60 mm Lst dominated in colder months. The relationship between the sexes differed significantly from the 1:1 reason with predominance of females in almost every month. Higher values of K factor were recorded at the end of the spring and summer for both streams. This species has a slightly allometric growth and

  8. Sedimentology of granite boulder conglomerates and associated clastics in the onshore section of the late Mesozoic Pletmos Basin (Western Cape, South Africa)

    Science.gov (United States)

    Bordy, Emese M.; America, Travis

    2016-07-01

    Along the southern margin of South Africa, intermountain rift successions, which comprise unusually large, rounded granite boulders and other coarse clastics, reveal an important geological history about the mid-Mesozoic extensional tectonics that lead to the break-up of Gondwana. These strata, mapped as part of the Mid to Upper Jurassic Enon Formation, allow the assessment of the nature, intensity and mode of sediment transport in onshore section of the Pletmos Basin, which is one of the late Mesozoic basins in southern Africa. Based on sedimentary facies analysis, palaeocurrent measurements and semi-quantitative palaeohydraulic calculations, the results suggest that the abundant coarse sediment was deposited by debris-flows and stream-flow floods on a proximal alluvial fan with high gradient alluvial channels. The floods were intense with mean flow velocity of ∼6 m3/s and peak discharge of ∼450 m3/s. While the role of climate in the sedimentation dynamics remains unknown, syn-sedimentary rift tectonics were likely significant and caused, north of the major boundary fault, the unroofing and denudation of the uplifted mountainous source areas, including the Late Ediacaran-Cambrian Maalgaten Granite Suite and the Siluro-Ordovician Table Mountain Group (Cape Supergroup).

  9. Geoquímica de ríos de montaña en las Sierras Pampeanas: I. Vertientes y arroyos del batolito de Achala, provincia de Córdoba, Argentina Geochemistry of mountain rivers in the Sierras Pampeanas: I. Springs and streams in the Achala batholith, Córdoba province, Argentina

    OpenAIRE

    A. I. Pasquini; L. B. Grosso; A. P. Mangeaud; P. J. Depetris

    2002-01-01

    Se analiza la composición química de vertientes y arroyos de altura (>1100 m s.n.m.) sobre el batolito de Achala en las Sierras Pampeanas de Córdoba, donde la litología dominante es un monzogranito porfírico. El agua tiene una composición mayoritaria bicarbonatada/sódico-potásica a cálcica. La concentración de los elementos disueltos tiene un orden de magnitud entre 10³ y 10(7) veces inferior a la corteza continental superior y al granito dominante. La concentración de los elementos químicos ...

  10. Dieta y ecomorfología de la ictiofauna del arroyo Manantiales, provincia de Buenos Aires, Argentina Diet and ecomorphology of the ichthyofauna of Manantiales stream, Buenos Aires province, Argentina

    Directory of Open Access Journals (Sweden)

    Eduardo M Fernández

    2012-06-01

    Full Text Available Se estudio la correlación entre dieta y morfología de 19 especies de peces del arroyo Manantiales, cabecera del río samborombón, provincia de Buenos Aires, Argentina. Las especies fueron clasificadas en cuatro grupos tróficos: carnívoros, omnívoros, insectívoros y detritívoros- alguívoros. Se analizaron 12 atributos ecomor-fológicos relacionados con el uso del hábitat y la alimentación con el fin de distinguir patrones ecomorfológicos de las especies y de las especies con el alimento consumido. Se utilizaron técnicas de análisis univariado y multivariado para determinar agrupamientos de especies utilizando los atributos ecomorfológicos y la dieta como descriptores. Los carnívoros se relacionaron con un buen desarrollo de cabeza, boca, aletas caudal y pectoral; y en general con cuerpos comprimidos. Los omnívoros constituyeron un grupo más heterogéneo. Las formas nectónicas de este grupo se relacionaron con un cuerpo comprimido, ojos laterales y tamaño relativamente pequeño de las aletas pectorales y aleta caudal; las formas nectobentónicas se relacionaron con boca pequeña, cuerpo fusiforme y pedúnculo caudal largo; y las formas bentónicas, con cuerpo deprimido, ojos de posición dorsal, boca ínfera y tubo digestivo largo. La única especie nectónica consumidora de insectos sobre la superficie se caracterizó por un cuerpo fuertemente comprimido, ojos laterales, aleta caudal grande y boca grande orientada hacia arriba. Los detritívoros-alguívoros presentaron un tubo digestivo largo, boca ínfera o terminal y aletas caudales largas. La relación significativa dieta-ecomorfología permite sostener que peces de dieta similar convergen hacia atributos ecomorfológicos comunes.The present study addresses the correlation between diet and morphology of 19 fish species that inhabit the Manantiales stream at the headwaters of the samborombón river, Buenos Aires province, Argentina. The species were classified into four

  11. Oncoides tipo Osagia en la Formación La Manga (Oxfordiano y su significado paleoecológico, arroyo La Vaina, Mendoza Osagids-types oncoids from La Manga Formation and their paleoecological significance, La Vaina Creek, Mendoza

    Directory of Open Access Journals (Sweden)

    R.M. Palma

    2007-11-01

    Full Text Available Oncoides microbianos fueron encontrados en calizas del Oxfordiano de la Formación La Manga en la sección del Arroyo La Vaina, provincia de Mendoza. Los oncoides se presentan en packstones, floatstones-rudstones o dispersos en wackestones. Presentan formas elípticas, ameboidales y esféricas. Se reconocieron diferentes tipos de oncoides de acuerdo a las características de sus envolturas: (1 laminaciones micríticas, (2 laminaciones grumosas, y (3 laminaciones con organismos incrustantes. Sus núcleos están representados por fragmentos de moluscos, equinoideos, peloides e intraclastos. La envoltura sigue la forma del núcleo en la zona interna de la corteza. Sin embargo, en las zonas externas, la laminación contiene organismos incrustantes dominados por nubeculáridos y serpúlidos. Algunos oncoides, especialmente las formas ameboidales y elípticas, están caracterizados por múltiples núcleos, representados por oncoides pequeños. Los oncoides aparecen conjuntamente con bivalvos, equinodermos, foraminíferos y serpúlidos. La fauna indica condiciones someras, tranquilas, y la excelente preservación de los equinodermos sugiere mínimo transporte antes del enterramiento. Los oncoides crecieron en un ambiente marino normal, en el sector submareal, de aguas someras, con agitación leve a moderada. El limitado rolido en el crecimiento de los oncoides probablemente fue acompañado por corrientes intermitentes que reorientaron los oncoides paralelos a la estratificación. La laminación discontinua con organismos incrustantes refleja períodos de no agitación y litificación que facilitaron el crecimiento de organismos incrustantes sobre oncoides estáticos durante un período de baja tasa de sedimentación. La depositación de calizas con oncoides ocurrió durante la somerización del intervalo carbonático, asociada con la emersión, exposición subaérea y desarrollo de un paleokarst, como consecuencia de fluctuaciones relativas del nivel

  12. Arroyo Toad Range - CWHR [ds612

    Data.gov (United States)

    California Department of Resources — Vector datasets of CWHR range maps are one component of California Wildlife Habitat Relationships (CWHR), a comprehensive information system and predictive model...

  13. Concentrations of metals in water, sediment, biofilm, benthic macroinvertebrates, and fish in the boulder river watershed, Montana, and the role of colloids in metal uptake

    Science.gov (United States)

    Farag, A.M.; Nimick, D.A.; Kimball, B.A.; Church, S.E.; Harper, D.D.; Brumbaugh, W.G.

    2007-01-01

    To characterize the partitioning of metals in a stream ecosystem, concentrations of trace metals including As, Cd, Cu, Pb, and Zn were measured in water, colloids, sediment, biofilm (also referred to as aufwuchs), macroinvertebrates, and fish collected from the Boulder River watershed, Montana. Median concentrations of Cd, Cu, and Zn in water throughout the watershed exceeded the U.S. EPA acute and chronic criteria for protection of aquatic life. Concentrations of As, Cd, Cu, Pb, and Zn in sediment were sufficient in the tributaries to cause invertebrate toxicity. The concentrations of As, Cu, Cd, Pb, and Zn in invertebrates from lower Cataract Creek (63, 339, 59, 34, and 2,410 ??g/g dry wt, respectively) were greater than the concentrations in invertebrates from the Clark Fork River watershed, Montana (19, 174, 2.3, 15, and 648 ??g/g, respectively), that were associated with reduced survival, growth, and health of cutthroat trout fed diets composed of those invertebrates. Colloids and biofilm seem to play a critical role in the pathway of metals into the food chain and concentrations of As, Cu, Pb, and Zn in these two components are significantly correlated. We suggest that transfer of metals associated with Fe colloids to biological components of biofilm is an important pathway where metals associated with abiotic components are first available to biotic components. The significant correlations suggest that Cd, Cu, and Zn may move independently to biota (biofilm, invertebrates, or fish tissues) from water and sediment. The possibility exists that Cd, Cu, and Zn concentrations increase in fish tissues as a result of direct contact with water and sediment and indirect exposure through the food chain. However, uptake through the food chain to fish may be more important for As. Although As concentrations in colloids and biofilm were significantly correlated with As water concentrations, As concentrations in fish tissues were not correlated with water. The pathway for

  14. Irrigated agriculture is an important risk factor for West Nile virus disease in the hyperendemic Larimer-Boulder-Weld area of north central Colorado.

    Science.gov (United States)

    Eisen, Lars; Barker, Christopher M; Moore, Chester G; Pape, W John; Winters, Anna M; Cheronis, Nicholas

    2010-09-01

    This study focused on two West Nile virus (WNV) disease outbreak years, 2003 and 2007, and included a three-county area (Larimer, Boulder, and Weld) in North Central Colorado that is hyperendemic for WNV disease. We used epidemiological data for reported WNV disease cases at the census tract scale to: (1) elucidate whether WNV disease incidence differs between census tracts classified as having high versus lower human population density (based on a threshold value of 580 persons/km2) and (2) determine associations between WNV disease incidence and habitat types suitable as development sites for the larval stage of Culex mosquito vectors. WNV disease incidence was significantly elevated in census tracts with lower human population density, compared with those with high density of human population, in both 2003 (median per census tract of 223 and 143 cases per 100,000 population, respectively) and 2007 (median per census tract of 46 and 19 cases per 100,000 population). This is most likely related, in large part, to greater percentages of coverage in less densely populated census tracts by habitats suitable as development sites for Culex larvae (open water, developed open space, pasture/hay, cultivated crops, woody wetlands, and emergent herbaceous wetlands) and, especially, for the subset of these habitats made up by irrigated agricultural land (pasture/hay and cultivated crops) that presumably serve as major producers of the locally most important vector of WNV to humans: Culex tarsalis. A series of analyses produced significant positive associations between greater coverage of or shorter distance to irrigated agricultural land and elevated WNV disease incidence. As an exercise to produce data with potential to inform spatial implementation schemes for prevention and control measures within the study area, we mapped the spatial patterns, by census tract, of WNV disease incidence in 2003 and 2007 as well as the locations of census tracts that had either low (75th

  15. Los depositos de yeso intrasedimentario del arroyo El Siasgo, partidos de Monte y General Paz, provincia de Buenos Aires Intrasedimentary gypsum deposits of El Siasgo Creek, Monte and General Paz districts, Buenos Aires Province

    Directory of Open Access Journals (Sweden)

    N. V. Dangavs

    2002-09-01

    Full Text Available El arroyo El Siasgo es un afluente del río Salado, situado en la región NE de la provincia de Buenos Aires. En su cuenca inferior, su curso recorta una gran depresión, remanente de una antigua cuenca de deflación colmatada, donde se desarrollaron, desde el Pleistoceno superior, diversos ambientes sedimentarios, principalmente acuáticos. Actualmente, se desarrolla, en esta depresión, un ambiente léntico temporario de 2.750 ha, dividido en dos cuerpos mediante un estrechamiento de la cubeta de 2 km de largo y 0,7 km de ancho. Al norte del estrechamiento se sitúa el cuerpo menor, denominado "La Cañada" y hacia el sur el mayor o "laguna del Siasgo". En los sedimentos clásticos hospedantes de este paleoambiente léntico múltiple aparece una importante acumulación de yeso intrasedimentario en distintos niveles estratigráficos (Formaciones Lobos, Luján y La Postrera I, cristalizado principalmente en tamaño arena, con diversidad de hábitos, texturas, fábricas y estructuras. Los sedimentos hospedantes del yeso son esencialmente fangos, cuya textura original se encuentra modificada por la presencia del mineral epigénico en fangos y limos arenosos e incluso en arenas fangosas. Este depósito yesífero abarca una superficie de 25,6 km², con un espesor medio de 2,15 m en el subambiente "del Siasgo" y de 0,91 m en "La Cañada". El volumen de sedimentos con yeso alcanza a 48 hm³ y la ley mineral mínima es 53,5% en la "laguna del Siasgo", con un total de 53.623.000 de toneladas de yeso impuro, mientras que en "La Cañada, con una ley media de 20,1 %, solamente alcanza a 1.361.000 toneladas de yeso impuro. Cabe señalar, que la baja ley del mineral en "La Cañada" descarta su aprovechamiento como recurso económico, mientras que el yeso presente en el subambiente "del Siasgo" es de alta potencialidad para su explotación, incluso en su valor mínimo. Estos yesos son el producto de la interacción de aguas superficiales y subterr

  16. Tunnel boring machine collision with an ancient boulder beach during the excavation of the Barcelona city subway L10 line: a case of adverse geology and resulting engineering solutions

    OpenAIRE

    Filbà, Marta; Salvany Duran, Josep Maria; Jubany, Jordi; Carrasco, Laura

    2016-01-01

    The existence of a layer of hard boulders up to 1 m in size within the soft sediments of the Holocene Llobregat delta in the SW of Barcelona city caused the damage and stoppage of the EPB-type tunnel boring machine that excavated the subway L10 line. This layer constitutes a detrital deposit of exceptionally large grain size developed in the base of the delta. It originated as an alluvial fan in the northern margin of the delta during the last fall of the Mediterranean Sea level, at the end o...

  17. Organic matter characterization and decomposition dynamics in sub-Antarctic streams impacted by invasive beavers Caracterización de la materia orgánica y la dinámica de descomposición en arroyos subantárticos impactados por castores invasores

    Directory of Open Access Journals (Sweden)

    Erica Ulloa

    2012-11-01

    Full Text Available Despite being a relatively remote and well conserved area, the sub-Antarctic ecoregion faces pressing global threats from climate change, the ozone hole and introduced species. Its freshwater ecosystems are one of the least studied components of this biome, but they are known to confront a host of invasive taxa including trout and beavers. We set out to understand the basic characterization and dynamics of organic matter processing and decomposition in sub-Antarctic streams under natural forest (NF conditions and in ponds constructed by North American beavers (Castor canadensis (BP. We found these streams have a naturally stable benthic organic matter regime throughout the year with a peak in leaf input from Nothofagus pumilio in autumn. Beaver ponds significantly increased the retention of organic matter and caused significantly higher decomposition rates, probably associated with increased density and biomass of Hyalella spp. As expected, leaf decay rates for N. pumilio, a deciduous species, were higher (NF: -0.0028 day- ± 0.0001 SE; BP: -0.0118 day-1 ± 0.0009 SE than N. betuloides (a broad-leaf evergreen (NF: -0.0018 day-1 ± 0.0005 SE; BP: -0.0040 day-1 ± 0.0003 SE. Overall these results indicate that the naturally low decomposition rates (slower than 89% of a global survey of decay rates for these cold, oligotrophic streams are being modified by introduced beavers to resemble more temperate latitudes.A pesar de ser una zona relativamente remota y bien conservado, la ecorregión subantártica se enfrenta a presiones por amenazas globales por el cambio climático, el agujero de ozono y las especies introducidas. Los ecosistemas de agua dulce son uno de los componentes menos estudiados de este bioma, pero se sabe que enfrentan una serie de taxones invasivos como la trucha y los castores. El propósito de este estudio es entender la caracterización básica y dinámica de descomposición de la materia orgánica en arroyos subantárticos de

  18. Temporal variations in the diet of the exotic rainbow trout (Oncorhynchus mykiss in an Andean-Patagonian canopied stream Variación temporal en la dieta de la trucha exótica arco iris (Oncorhynchus mykiss en un arroyo forestado de los Andes patagónicos

    Directory of Open Access Journals (Sweden)

    LEONARDO M BURIA

    2009-03-01

    Full Text Available We examined seasonal and diel variation in prey species composition and biomass in the diet of the exotic rainbow trout Oncorhynchus mykiss (Walbaum, 1972. The study was carried out in the upper-forested sections of a low order stream in Andean-Patagonia. We studied the importance of functional feeding groups of aquatic invertebrates and the relative contribution of terrestrial and aquatic prey items in order to assess the pathways connecting terrestrial and aquatic ecosystems along a stream food web. Trout fed on approximately 40 invertebrate species and scrapers were consistently selected, suggesting their increased vulnerability to predation. However in terms of biomass, rainbow trout diet was mostly composed by shredders which emphasized the role of the allochthonous plant detritus pathway in food webs of forested small streams. Trout individuals fed more intensively in spring and summer and during daytime. Terrestrial items constituted a minor proportion of the diet implying that this component did not represent a significant subsidy for this fish population. As a consequence, the top-down effect on the aquatic community does not appear to be dampened since trout do not strongly preyed on terrestrial invertebrates.Se estudió la variación estacional y diaria en la composición y biomasa de las especies presa en la dieta de la exótica trucha arco iris Oncorhynchus mykiss (Walbaum, 1972 en la sección superior de un arroyo boscoso de bajo orden en los Andes patagónicos. Se analizó la importancia de los grupos funcionales alimentarios de invertebrados acuáticos y la contribución relativa de las presas de origen terrestre y acuático para evaluar las vías tróficas que conectan los ecosistemas acuático y terrestre circundantes. Las truchas consumieron aproximadamente unas 40 especies de invertebrados y los raspadores fueron consistentemente seleccionados, sugiriendo una alta vulnerabilidad a la depredación. Sin embargo en términos de

  19. Efecto del reemplazo de la vegetación nativa de ribera sobre la comunidad de macroinvertebrados bentónicos en arroyos de climas templados, Chile central Replacement effect of riparian native vegetation on benthic macroinvertebrates community in temperate climate streams, Central Chile

    Directory of Open Access Journals (Sweden)

    Gabriela Mancilla

    2009-12-01

    Full Text Available El aporte de materia orgánica desde la vegetación ribereña es determinante en la estructura y complejidad de los sistemas fluviales; es identificado como el mayor aporte energético en ríos y una fuente importante de alimento para macroinvertebrados en arroyos de cabecera. No obstante, el paisaje ribereño ha sido altamente degradado por actividades humanas, lo que ha afectado la estructura y composición de las comunidades acuáticas. El presente estudio se desarrolló en Chile central (región del Biobío donde se concentra una intensa actividad forestal con especies exóticas. Se seleccionaron ríos de bajo orden (The organic matter from riparian vegetation is determined by the structure and complexity of streams. It presents a higher energetic input to streams as well as important source of food for macroinvertebrates in head streams. In spite of its importance, riparian landscape has been rapidly degraded by human activity, this affects structure and composition of the aquatic community. The present study was made in Central Chile (Biobio Region which has intensive forest activity with exotic species. Small streams were selected (< 3 order, because they are very particularly sensitive to changes in land use. The sites were grouped identified according to native forest land cover larger than 20% (group 1 and smaller than 20% (group 2. Significant differences (p< 0.05 in Plecoptera abundance (p < 0.05 were found between the two groups. Differences in trophic groups were significant for shredders and predators increased and gathering-collectors decreased their abundance, with native cover smaller than 20%. This showed the dependent on allochthonous material. The vegetation cover and community parameters correlations showed that Diversity (W increased with higher percentage of watershed covered by native vegetation and exotic species mix. Results suggest that a buffer conservation area of native riparian vegetation is necessary in streams

  20. Solar Imagery - Composites - Full Sun Drawings - Boulder

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Synoptic Analysis Drawings, also known as Neutral Line (NL) drawings, are produced each day by space weather forecaster at the NOAA National Weather Service (NWS)...

  1. 78 FR 48670 - Boulder Canyon Project

    Science.gov (United States)

    2013-08-09

    ... determining the Base Charge and Rates: 1. A Federal Register notice was published on February 4, 2013 (78 FR... (50 FR 37835), and 18 CFR part 300. Department of Energy procedures were followed by Western in..., 1987 ] (57 FR 43154), and the BCPIA, the rates are reviewed annually and adjusted upward or downward...

  2. 77 FR 48151 - Boulder Canyon Project

    Science.gov (United States)

    2012-08-13

    ... and Rates: 1. A Federal Register notice was published on January 18, 2012 (77 FR 2533), announcing the... adjustments are located at 10 CFR part 903, effective September 18, 1985 (50 FR 37835), and 18 CFR part 300..., 2012 (77 FR 2533). Under Delegation Order Nos. 00-037.00 and 00-001.00C, and in compliance with 10...

  3. 76 FR 56430 - Boulder Canyon Project

    Science.gov (United States)

    2011-09-13

    ... parties in determining the Rates: 1. A Federal Register notice was published on February 14, 2011 (76 FR... September 18, 1985 (50 FR 37835), and 18 CFR part 300. DOE procedures were followed by Western in developing... FR 8359). Under Delegation Order Nos. 00-037.00 and 00-001.00C, and in compliance with 10 CFR...

  4. Facies y microfacies de la rampa tithoniana-berriasiana de la cuenca neuquina (Formación Vaca Muerta en la sección del arroyo Loncoche - Malargüe, provincia de Mendoza Facies and microfacies of the Tithonian-Berriasian ramp from the Neuquén basin (Vaca Muerta Formation in the Loncoche creek section - Malargüe, Mendoza

    Directory of Open Access Journals (Sweden)

    Diego A. Kietzmann

    2008-12-01

    Full Text Available La Formación Vaca Muerta (Tithoniano-Berriasiano consiste en una alternancia rítmica de lutitas negras, lutitas grises, margas y limolitas, con mudstones, wackestones, packstones, floatstones y rudstones bioclásticos. La asociación de facies en la sección del arroyo Loncoche, permitió definir 12 litofacies y 8 microfacies, dominadas por moluscos, equinodermos, foraminíferos, braquiópodos, serpúlidos y radiolarios. Se distinguieron cuatro asociaciones de facies correspondientes a los subambientes de cuenca, rampa externa (distal y proximal y rampa media. La utilización de la relación Nassellaria/Spumellaria permitió estimar un rango de profundidades menores a 200 metros. El patrón de apilamiento y la distribución vertical de facies permitió la distinción de tres secuencias depositacionales, y el reconocimiento de un sistema tithoniano de rampa homoclinal y un sistema berriasiano de rampa homoclinal de mayor gradiente. La secuencia depositacional 1 consiste en facies de cuenca y rampa externa distal y se caracteriza por un patrón retrogradacional. Presenta un espesor de 124 m, y se extiende desde la Zona de Virgatosphinctes mendozanus hasta la base de la Zona de Corongoceras alternans. Las secuencias depositacionales 2 y 3 consisten en facies de rampa externa y rampa media. Están caracterizadas por un patrón agradacional y progradacional. El espesor de la secuencia 2 es de 66 m y se asigna a la Zona de Corongoceras alternans, mientras que la secuencia 3 alcanza 78 m y corresponde a las zonas de Substeueroceras koeneni y Spiticeras damesi.Facies association of the Tithonian-Berriasian Vaca Muerta Formation from the Loncoche creek section, Neuquén Basin, west central Argentina, allow the distinction and definition of 12 lithofacies and 8 microfacies, which are dominated by molluscs, echinoderms, foraminifera, brachiopods, serpulids and radiolarians. The Vaca Muerta Formation consists of a rhythmical alternation of black shales

  5. Perifiton en el mesohábitat de corredera de un arroyo serrano: dinámica estacional en relación a variables físico-químicas Periphyton in a run mesohabitat of a mountain stream: seasonal dynamics related to physicochemical parameters

    Directory of Open Access Journals (Sweden)

    M. Andrea Amaidén

    2011-12-01

    Full Text Available Se analizó la composición y la distribución de algas perifíticas en un mesohábitat de corredera del arroyo Achiras, al suroeste de Río Cuarto, Córdoba, estacionalmente durante el período 2005-2006. Se seleccionaron tres sitios de muestreo en el gradiente longitudinal de una zona serrana y pedemontana, donde se realizará la construcción de una presa. Esta investigación aporta los primeros resultados sobre la comunidad algal perifítica y sienta las bases para una profundización futura. Se determinaron 267 taxones, la clase Bacillariophyceae aportó 174, Chlorophyceae 78 y Cyanophyceae 15. La máxima similitud entre las muestras fue de 100 %, correspondiendo a los sitios 1 y 2 durante la primavera. La mayor abundancia promedio fue de 320.486 org.cm-2 para el sitio 3 durante el verano. La clasificación de las muestras separó dos grupos principales y conformó subgrupos. El CCA efectuado a muestras y especies mostró una separación del sitio 3, ubicado en el pedemonte, con mayor porcentaje de sedimento de menor tamaño y una menor velocidad de corriente respecto a los otros. Los sitios 1 y 2 se caracterizaron, en general, por un gradiente de pH. Todos los grupos formados por la clasificación estuvieron integrados, en su mayoría, por organismos del orden Biraphidales.Composition and distribution of periphytic algae in a run mesohabitat of the stream Achiras, southwest of Rio Cuarto, Cordoba, were analyzed seasonally during 2005-2006. Three sites were selected for sampling in the longitudinal gradient of a mountainous and piedmont area, where the construction of a dam is considered. This research provides the first results on the algal periphytic community and lays the groundwork for a deepening future. A total of 267 taxa were identified, the class Bacillariophyceae contributed with 174 taxa, Chlorophyceae with 78 and Cyanophyceae with 15. The maximum similarity between samples was 100%, corresponding to sites 1 and 2 during the

  6. Geoquímica de ríos de montaña en las Sierras Pampeanas: I. Vertientes y arroyos del batolito de Achala, provincia de Córdoba, Argentina Geochemistry of mountain rivers in the Sierras Pampeanas: I. Springs and streams in the Achala batholith, Córdoba province, Argentina

    Directory of Open Access Journals (Sweden)

    A. I. Pasquini

    2002-12-01

    Full Text Available Se analiza la composición química de vertientes y arroyos de altura (>1100 m s.n.m. sobre el batolito de Achala en las Sierras Pampeanas de Córdoba, donde la litología dominante es un monzogranito porfírico. El agua tiene una composición mayoritaria bicarbonatada/sódico-potásica a cálcica. La concentración de los elementos disueltos tiene un orden de magnitud entre 10³ y 10(7 veces inferior a la corteza continental superior y al granito dominante. La concentración de los elementos químicos está vinculada con el grado de movilidad de los mismos bajo condiciones de meteorización incipiente. Los elementos más móviles (alcalinos y alcalinotérreos presentan las concentraciones más elevadas en el agua y en la roca, mientras los más inmóviles (Al, Ga, Ti, Zr, Hf, Th y tierras raras exhiben las más bajas. Ambos grupos de elementos están sujetos a un control litológico significativo. Los metales de transición, tienen solubilidades y concentraciones variables, sugiriendo la existencia de otros controles además del litológico. Los iones mayoritarios evidencian una dilución estival cercana al 60%, mientras que los elementos traza manifiestan un incremento de sus concentraciones por movilización durante el período estival. Las características geológicas de la región, junto con su condición climática semiárida, favorecen el predominio de un régimen de denudación "limitado por la meteorización", donde los procesos de erosión física predominan sobre la meteorización química. Bajo estas condiciones, las características geoquímicas del agua en la región, escasamente afectada por la actividad antrópica, ponen de manifiesto el control que ejercen la litología y el relieve sobre las mismas.The chemical composition of mountainous (>1,100 m a.s.l. springs and streams from the Achala batholith, in the Pampean Range of Córdoba, Argentina are analized; in this area, the most important lithology is porphyritic monzogranite

  7. El arroyo Azul como escenario para el aprendizaje escolar

    OpenAIRE

    Rudzik, Gabriela; Merlos, Cristina; Grosman, Fabián

    2007-01-01

    La Educación Ambiental constituye el pilar básico para una sociedad con alta conciencia ecológica, lo cual se logra con información (Abaca y Vila, 1992). En este marco, la premisa que lo que se conoce se quiere y respeta (Arango et al., 2002), es un principio capital aplicable a nuestro medio natural. Conforma una importante y determinante herramienta para promover la participación del ciudadano en el desarrollo armónico; de allí la relevancia de su inclusión en las currículas educativas en t...

  8. Acueducto pretensado sobre el arroyo de El Gato

    Directory of Open Access Journals (Sweden)

    Ruiz de Azúa y Murgía, M. A.

    1966-12-01

    Full Text Available This project is located on the main canal of the VII sector of the Bembézar (Seville irrigated zone. It is 512.5 m long, consisting of 25 spans, each 20.50 m long. There are, in addition, two approach aqueducts, each of them 13 m in length. The arrangement adopted was the classical one, of structural boxes, with a lower slab, and tie members between the top chords. Prestressed concrete was used, to ensure the watertightness of the canal, as well as achieving a 12% reduction in cost with respect to traditional designs in reinforced concrete.La obra que se relata está ubicada en el canal principal del sector VII de la zona regable del Bembézar (Sevilla. Tiene 513,5 m de longitud (25 vanos de 20,50 m, además de los dos acuerdos de acceso, de 13 m cada uno. La solución adoptada fue la clásica de cajeros resistentes con losa inferior de solera y tirantes entre las cabezas superiores, empleándose el hormigón pretensado por asegurarse así la impermeabilidad del conjunto, además de obtener una economía del 12 por 100 respecto a los tipos tradicionales de hormigón armado.

  9. Interação genótipo × ambiente para peso ao ano em bovinos Nelore Mocho no Nordeste do Brasil

    Directory of Open Access Journals (Sweden)

    Diego Pagung Ambrosini

    2012-10-01

    Full Text Available O objetivo deste trabalho foi avaliar a interação genótipo × ambiente (IGA quanto ao peso ajustado aos 365 dias de idade, em bovinos da raça Nelore Mocha do Nordeste do Brasil, por meio de modelos de norma de reação, via regressão aleatória com abordagem bayesiana. Os modelos analisados incluíram o efeito fixo de idade da vaca (linear e quadrático e os efeitos aleatórios genético aditivo e de grupo de contemporâneos. O modelo de norma de reação com variância residual homogênea e um passo (MHNRHO1P proporcionou melhor ajuste aos dados do que os modelos com variância residual heterogênea e o modelo animal padrão (MA. As estimativas de variância genética (64,41±13,24 kg² a 842,31±58,29 kg² e herdabilidade (0,11±0,01 a 0,63±0,02 aumentaram com a melhoria do gradiente ambiental. As correlações de Spearman variaram de 0,69 a 0,99, entre as classificações dos reprodutores com maiores valores genéticos nos MA e MHNRHO1P, nos diferentes ambientes, o que indica alteração na classificação, especialmente dos valores genéticos obtidos pelo MA nos ambientes superiores. A identificação desse nível de IGA torna necessárias as avaliações específicas dos indivíduos e rebanhos para os ambientes de baixo, médio e alto nível de produção.

  10. Delineating incised stream sediment sources within a San Francisco Bay tributary basin

    Science.gov (United States)

    Bigelow, Paul; Benda, Lee; Pearce, Sarah

    2016-07-01

    Erosion and sedimentation pose ubiquitous problems for land and watershed managers, requiring delineation of sediment sources and sinks across landscapes. However, the technical complexity of many spatially explicit erosion models precludes their use by practitioners. To address this critical gap, we demonstrate a contemporary use of applied geomorphometry through a straightforward GIS analysis of sediment sources in the San Francisco Bay Area in California, USA, designed to support erosion reduction strategies. Using 2 m lidar digital elevation models, we delineated the entire river network in the Arroyo Mocho watershed (573 km2) at the scale of ˜ 30 m segments and identified incised landforms using a combination of hillslope gradient and planform curvature. Chronic erosion to the channel network was estimated based on these topographic attributes and the size of vegetation, and calibrated to sediment gage data, providing a spatially explicit estimate of sediment yield from incised channels across the basin. Rates of erosion were summarized downstream through the channel network, revealing patterns of sediment supply at the reach scale. Erosion and sediment supply were also aggregated to subbasins, allowing comparative analyses at the scale of tributaries. The erosion patterns delineated using this approach provide land use planners with a robust framework to design erosion reduction strategies. More broadly, the study demonstrates a modern analysis of important geomorphic processes affected by land use that is easily applied by agencies to solve common problems in watersheds, improving the integration between science and environmental management.

  11. Sisyphus’s Boulder:An Interpretation of Work

    Institute of Scientific and Technical Information of China (English)

    ZHOU Rong-rong

    2014-01-01

    People use their freedom to choose a proper work, while the work selects appropriate people. To some extent, people interact with the outside through work. Work has mutual effect on internal challenge of a person and the external change of the world.

  12. 77 FR 64333 - Relocation of Transmission Lines for the U.S. 93 Boulder City Bypass Project, Boulder County, NV...

    Science.gov (United States)

    2012-10-19

    ... for the Project EIS (FHWA-NV-EIS-00-02-F; April 2005; 76 FR 34073). Western was a cooperating agency... needs are satisfied and, with this notice, is adopting the Project EIS for its participation in the... the western end of the Hoover Dam Bypass project near the Hacienda Hotel and Casino. Western...

  13. 75 FR 37358 - Endangered and Threatened Wildlife and Plants; Revised Critical Habitat for the Arroyo Toad

    Science.gov (United States)

    2010-06-29

    ... 7 percent discount rate. Overall, the real estate industry (real estate development, CEQA, and delay... present value terms using a 7 percent discount rate. Overall, the real estate industry (real estate... following categories: (1) Real estate development; (2) changes in water supply; (3) grazing activities;......

  14. Conocer para valorar y respetar : El arroyo del azul desde la perspectiva ambiental

    OpenAIRE

    Merlos, Cristina; Aguirre, Daniela; Bertuzzi, Emilio; Birnstil, Vanesa; Bocchio, Verónica; Chindamo, Micaela; Cremona, Camila; Grosman, Fabián; González Castenail, José; Graziano, Lautaro; Mutuberría, Soledad; Pucheu, Soledad; Ozán, Pamela; Ozán, Gastón; Saggio, Leila

    2012-01-01

    En las actividades desarrolladas se introducen conceptos, mensajes enfáticos sobre la importancia de las prácticas conservacionistas y los problemas relacionados con la alteración del hábitat, cambio de uso del suelo, contaminación por agroquímicos, paisaje previo a la conquista, acerca de los pueblos originarios, el proceso de agriculturación y otros temas que en base al interés de docentes y alumnos se abordaban con mayor o menor grado de profundidad. Todo ello con la intención de conocer e...

  15. [Salmonella: its incidence in waters of the Zaimán arroyo].

    Science.gov (United States)

    Benassi, F O; Martínez Vázquez, F; Eiguer, T

    1983-01-01

    The present work is the initial stage of a project to determine the causes and degree of pollution of the Zaiman creek waters, which flow through wide suburban areas of Posadas, Argentina. The research was focused on the presence of Salmonella serotypes, pathogenic microorganisms probably responsible for most waterborne disease outbreaks. In addition, the N.M.P./100 ml (Most Probable Number) of total coliform organisms was determined in samples collected from points near cold storage plant and slaughterhouse, both to show the pollution effect of industrial discharges. So far, 35 sampling operations have been carried out in representative geographic points. The methodology for Salmonella consisted in applying concentration technics for waterborne pathogens, followed by an enrichment procedure performed by incubating samples in Dulcitol Selenite and Tetrathionate (Muller-Kauffman) broths at 41.5 degrees C during 25 hours. Typical, well-isolated Salmonella-like colonies were obtained by streaking duplicate plates of E.M.B. Agar (Eosin Methylene Blue), Brilliant Green Agar and Bismuth Sulphite Agar. Suspected colonies were classified by 10 biochemical reactions and further verified by serological identification, performed at the National Institute of Microbiology "Carlos Malbrán". The methodology followed for the determination of total coliforms was the one described in the American Water Standards. Salmonella serotypes were isolated in 46% of the examined samples. Isolation efficiency of culture media is shown. First isolations of Salmonella abaetetuba and S. saphra are reported. Most serotypes were isolated from sampling points down-stream from the industrial plant. Zaimán creek waters were classified as No 4 of W.H.O (World Health Organization) stream waters classification, except during heavy rain periods in which they ranked as No 3. PMID:6336566

  16. 2012 NOAA Color Ortho-rectified Mosaic of Arroyo Colorado, Texas

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains ortho-rectified mosaic tiles, created as a product from the NOAA Integrated Ocean and Coastal Mapping (IOCM) initiative. The source imagery...

  17. Pré-filtração em pedregulho e filtração lenta com areia, manta não tecida e carvão ativado para polimento de efluentes domésticos tratados em leitos cultivados Pré-filtration in boulder and slow sand filtration with non-woven synthetic layers and granulated vegetal coal to improve quality in wastewater treated by constructed wetlands

    Directory of Open Access Journals (Sweden)

    José E. S. Paterniani

    2011-01-01

    Full Text Available O presente trabalho teve como objetivo comparar sistemas de filtragem, composto de pré-filtro de pedregulho seguido de filtro lento com o meio filtrante areia e no topo manta sintética não tecida e pré-filtro de pedregulho seguido de filtro lento com meio filtrante areia e carvão ativado granular e no topo manta sintética não tecida, para polimento de efluentes domésticos tratados em leitos cultivados, visando à aplicação na fertirrigação. Na comparação dos sistemas de filtragem, avaliou-se a eficiência de remoção dos parâmetros: sólidos em suspensão, turbidez, cor aparente, demanda química de oxigênio, oxigênio dissolvido, ferro, manganês, coliformes totais e E. coli. Os dois sistemas operavam 24 horas por dia, com a mesma taxa de aplicação, tratando uma vazão total final de 1,5 m³ dia-1, sendo que a taxa de aplicação para a unidade de pré-filtração era, em média, de 8,4 m³ m-2 dia-1 e para cada uma das unidades de filtração lenta era, em media, de 2,7 m³ m-2 dia-1. As unidades de pré-filtração e filtração lenta mostraram-se eficientes na redução das concentrações de sólidos suspensos, turbidez, cor aparente e DQO, como polimento de esgotos domésticos previamente tratados. O uso de carvão ativado granular, em combinação com areia, proporcionou ao filtro lento maior eficiência na remoção de sólidos suspensos, cor, turbidez, coliformes totais e E. Coli., sem com isso aumentar a perda de carga inicial. Existe a possibilidade de utilização dos efluentes para a prática da fertirrigação, sendo necessário o processo de desinfecção ou não, dependendo da cultura e o sistema de irrigação utilizado.The objective of this study was the comparison between two filtration systems, being one composed of a boulder pre-filter followed by a slow filter with sand as filtration media and a non-woven synthetic fabric in the upper part, and the other one composed of a boulder pre-filter followed by a

  18. Evolución y dinámica de la barrera medanosa entre los arroyos Zabala y Claromecó, partidos de San Cayetano y Tres Arroyos, Buenos Aires

    Directory of Open Access Journals (Sweden)

    L.C. Cortizo

    2007-03-01

    Full Text Available Se analiza un tramo del litoral sudeste de la provincia de Buenos Aires a través del análisis digital de fotografías del satélite Corona del año 1965 e imágenes del sensor Landsat TM (1999-2000. Datos complementarios concernientes a factores climáticos y morfología de playas fueron añadidos para el entendimiento de la dinámica eólica y de las formas medanosas resultantes. El proceso más importante fue la reducción en volumen de las formas medanosas reconocidas como semifijas y fijas al año 1965 (28% en la franja analizada de 70 x 3 km fundamentalmente por efectos del incremento en la humedad y reducción del aporte sedimentario. Se evidenció una variación en la dirección de los vientos predominantes del norte (1951-1960 al noroeste (1951-1990 que modificó la orientación de las crestas y favoreció la transición de médanos transversos barjanoides a parabólicos. La intensidad del viento del sector SO durante el período analizado fue el responsable de que las geoformas medanosas se mantengan en posición a expensas de una continua degradación. El efecto antrópico se ha centrado en la implantación de especies arbóreas para fijar las dunas así como para el desarrollo turístico (balnearios Claromecó, Orense y San Cayetano abarcando 50 Km² de una franja de 210 km²; aunque no hay efectos antrópicos que alteren la dinámica litoral. Se corroboró un aumento en las condiciones de humedad del suelo (aumento en las precipitaciones del 20% lo cual evidenció el rol de la vegetación en el control del campo de dunas.

  19. Efecto del ganado sobre la estructura de la vegetación en las riberas de un arroyo pampeano

    OpenAIRE

    Gantes, P.; L. De Falco; Sánchez Caro, A.

    2014-01-01

    Livestock is a main perturbation for the riparian zones of streams in the Buenos Aires province. Our goal is to compare the vegetation’s and soil’s characteristics of two almost contiguous reaches of the Nutrias stream, an affluent to the Reconquista river. One reach has been closed to cattle for 2 years, and the other -500m downstream- has kept livestock along the whole period. For each stream margin, six 10m transects were sampled for species cover and 3 soil samples were drawn for organic ...

  20. Benthic Habitats of Puerto Rico and the U.S. Virgin Islands; Photomosaic of Puerto Rico (Arroyo), 1999

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Habitat maps of Puerto Rico and the U.S. Virgin Islands were created by visual interpretation of aerial photographs using the Habitat Digitizer Extension. Aerial...

  1. Habitat sumergido: ideas y proyectos en el Arroyo “El Gato” Ringuelet, La Plata, Buenos Aires, Argentina

    OpenAIRE

    San Juan, Gustavo Alberto; Santinelli, Gabriel

    2015-01-01

    El presente documento expresa el fruto del pensamiento proyectual en el ámbito del Taller de Arquitectura. Ha sido el trabajo de alumnos y docentes conmocionados por los sucesos acaecidos el 2 y 3 de Abril del año 2013, ante la inundación sufrida en la ciudad de La Plata. Cinco días después del “desastre”, alumnos de los niveles 5 (29) y 6 (42), y docentes, decidieron realizar una reflexión profunda, en contra de la incertidumbre, desarrollando alternativas proyectuales, en las escalas, terri...

  2. Caracterización hidroquímica de los arroyos que vierten a la Ría de Huelva

    OpenAIRE

    Ruiz Cánovas, Carlos; Olías Álvarez, Manuel; Cerón García, Juan Carlos; Nieto Liñán, José Miguel

    2004-01-01

    The estuary known as Ría of Huelva receives the flow of two rivers intensely affected by acid mine drainage (AMD), the Odiel and Tinto rivers. The aim of this work is to evaluate the quality and the seasonal variations of the surface waters, no affected by AMD, which drain into the Ría of Huelva. We carried out a sampling campaign during one year in seven streams which drain an agricultural area with some small villages. The hidrochemistry of these streams depends on the lithology...

  3. Consideration of the ultramafic intrusive rocks in Arroyo Las Palmas (ex Cerro Chato - Las Canias) Durazno. R. O. del Uruguay

    International Nuclear Information System (INIS)

    This work is about the ultramafic rocks which its chemistry composition fluctuate since the basic to the ultra basic field and appear in the nascent of the Las Palmas stream near Las Canias and Cerro Chato district.

  4. 2012 NOAA Ortho-rectified Mosaic of Laguna Madre / Arroyo Colorado, Texas: Integrated Ocean and Coastal Mapping Product

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains ortho-rectified mosaic tiles, created as a product from the NOAA Integrated Ocean and Coastal Mapping (IOCM) initiative. The source imagery...

  5. Facies and carbon/oxygen isotopes of the Calabozo Formation (Middle Jurassic), Arroyo La Vaina, Mendoza, Argentina

    International Nuclear Information System (INIS)

    Facial / microfacial studies and geochemical isotopic analyses on marine jurassic carbonates of the Calabozo Formation (Dessanti, 1973) were carried out to reconstruct the palaeoenvironment and postdepositional history of the unit. This study is part of a project which purpose is the sedimentological and geochemical characterization of the Jurassic carbonate sequences of Cuenca Neuquina, in the southwestern Mendoza, Argentina. A detailed description about this basin can be found in Legarreta and Uliana (1999) and Riccardi et al. (2000). During the Late Bathonian and Early Callovian, the basin showed a reduction of the sedimentation area and a marked marginal facies progradation. West of Malargue, in areas with low detritic contribution, limestones of the Calabozo Formation were deposited. At the end of the Early Callovian, the basin was isolated, prevailing hypersaline conditions which caused the accumulation of the evaporites of the Tabanos Formation (Stipanicic, 1966) (au)

  6. Benthic Habitats of Puerto Rico and the U.S. Virgin Islands;Photomosaic of Puerto Rico (Arroyo), 1999

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Habitat maps of Puerto Rico and the U.S. Virgin Islands were created by visual interpretation of aerial photographs using the Habitat Digitizer Extension. Aerial...

  7. Evaluation of Background Concentrations of Contaminants in an Unusual Desert Arroyo Near a Uranium Mill Tailings Disposal Cell - 12260

    Energy Technology Data Exchange (ETDEWEB)

    Bush, Richard P. [U.S. Department of Energy Office of Legacy Management (United States); Morrison, Stan J. [S.M. Stoller Corporation (United States)

    2012-07-01

    The U.S. Department of Energy (DOE) Office of Legacy Management (LM) manages 27 sites that have groundwater containing uranium concentrations above background levels. The distal portions of the plumes merge into background groundwater that can have 50 μg/L or more uranium. Distinguishing background from site-related uranium is often problematic, but it is critical to determining if remediation is warranted, establishing appropriate remediation goals, and evaluating disposal cell performance. In particular, groundwater at disposal cells located on the upper Cretaceous Mancos Shale may have relatively high background concentrations of uranium. Elevated concentrations of nitrate, selenium, and sulfate accompany the uranium. LM used geologic analogs and uranium isotopic signatures to distinguish background groundwater from groundwater contaminated by a former uranium processing site. The same suite of contaminants is present in groundwater near former uranium processing sites and in groundwater seeps emanating from the Mancos Shale over a broad area. The concentrations of these contaminants in Many Devils Wash, located near LM's Shiprock disposal cell, are similar to those in samples collected from many Mancos seeps, including two analog sites that are 8 to 11 km from the disposal cell. Samples collected from Many Devils Wash and the analog sites have high AR values (about 2.0)-in contrast, groundwater samples collected near the tailings disposal cell have AR values near 1.0. These chemical signatures raise questions about the origin of the contamination seeping into Many Devils Wash. (authors)

  8. 75 FR 69433 - City of Boulder, CO; Notice of Availability of Environmental Assessment

    Science.gov (United States)

    2010-11-12

    ... Regulatory Commission's (Commission) regulations, 18 CFR part 380 (Order No. 486, 52 FR 47879), the Office of... features: (1) The Barker Reservoir; (2) the Barker Dam; (3) the outlet structure; (4) the concrete tunnel... action significantly affecting the quality of the human environment. A copy of the EA is attached to...

  9. Seismic Reflection - Focusing on Muting Jacquelyn Daves University of Colorado - Boulder SAGE 2014

    Science.gov (United States)

    Daves, J.

    2014-12-01

    The SAGE 2014 survey was conducted directly west of the Santo Domingo Pueblo, along Borrego Canyon Road. This survey is a continuation of the SAGE 2010 and 2011 investigations. The survey was aimed to locate a previously mapped fault running orthogonal to the road. The SAGE 2014 seismic line ran 5.6 km long with 20 meter geophone spacing. 8-80 Hz sweeps were utilized with 10 s sweeps and 4 s of listening. Once the data was converted into the proper file type, preprocesses was conducted. After the preprocessing was complete, various processing methods were used to obtain the final Common Midpoint (CMP) stack. Two CMP stacks were created-one containing the muting method and one without. The ideal result would be to interpret stratigraphic structures and potential faults. The Rio Grande Rift is a Cenozoic continental rift zone that extends approximately 1000 km from Leadville, Colorado to west Texas and Chihuahua, Mexico. The Northern most extent of the rift separates the Great Plains from the Colorado Plateau. The rift consists of a series of interconnected grabbens that lie in an asymmetric pattern (Baldridge, 1989). Basins involved with this rifting are a distinct features along with faults that bound one or both sides. SAGE has been investigating these for over a decade to interpolate the complex structures. By examining Borrego Canyon, we were able to add to the investigation. Various geophysical methods were utilized to study Borrego Canyon. AMT, MT, TEM, gravity, seismic reflection and seismic refraction were individually used to understand the subsurface and were subsequently integrated together in order to have a full spectrum of subsurface depths. Each method has unique processing steps and are critical in order to analyze the gathered data. As such, this paper will focus on processing seismic reflection with an emphasis on muting. Each technique used in processing the SAGE 2014 seismic reflection data will be explained. Next, this paper will validate muting in seismic reflection processing and demonstrate its importance in obtaining an accurate and visually pleasing final product. With the final product, a brief geological interpretation of the subsurface can be conducted. An explanation of the poor data and the lack of reflections will be given.

  10. Acoustic Noise Test Report for the SWIFT Wind Turbine in Boulder, CO

    Energy Technology Data Exchange (ETDEWEB)

    Roadman, J.; Huskey, A.

    2013-04-01

    This report summarizes the results of an acoustic noise test that the National Renewable Energy Laboratory (NREL) conducted on the SWIFT wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 11: Acoustic Noise Measurement Techniques, IEC 61400-11 Ed.2.1, 2006-11. However, because the SWIFT is a small turbine, as defined by IEC, NREL used 10-second averages instead of 60-second averages and utilized binning by wind speed instead of regression analysis.

  11. Enhanced TIFF Sidescan-Sonar Mosaic of Boulder Basin - Lake Mead, Nevada: Geographic Coordinates

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Lake Mead is a large interstate reservoir located in the Mojave Desert of southeastern Nevada and northwestern Arizona. It was impounded in 1935 by the construction...

  12. Enhanced Sidescan-Sonar Mosaic of Boulder Basin - Lake Mead, Nevada: Geographic Coordinates

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Lake Mead is a large interstate reservoir located in the Mojave Desert of southeastern Nevada and northwestern Arizona. It was impounded in 1935 by the construction...

  13. Elementary particle physics and high energy phenomena. [Dept. of Physics, Univ. of Colorado, Boulder, Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Barker, A.R.; Cumalat, J.P.; De Alwis, S.P.; DeGrand, T.A.; Ford, W.T.; Mahanthappa, K.T.; Nauenberg, U.; Rankin, P.; Smith, J.G.

    1992-06-01

    Experimental and theoretical high-energy physics programs at the University of Colorado are reported. Areas of concentration include the following: study of the properties of the Z[sup 0] with the SLD detector; fixed-target K-decay experiments; the R D program for the muon system: the SDC detector; high-energy photoproduction of states containing heavy quarks; electron--positron physics with the CLEO II detector at CESR; lattice QCD; and spin models and dynamically triangulated random surfaces. 24 figs., 2 tabs., 117 refs.

  14. The thermal emission from boulders on (25143) Itokawa and general implications for the YORP effect

    Czech Academy of Sciences Publication Activity Database

    Ševeček, P.; Brož, M.; Čapek, David; Ďurech, J.

    2015-01-01

    Roč. 450, č. 2 (2015), s. 2104-2115. ISSN 0035-8711 Grant ostatní: GA ČR(CZ) GA13-01308S; GA ČR(CZ) GAP209/10/0537 Institutional support: RVO:67985815 Keywords : numerical methods * minor planets * asteroid (25143) Itokawa Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 5.107, year: 2014

  15. EOS Aura Mission Status at Earth Science Constellation MOWG Meeting @ LASP (Boulder, CO) April 13, 2016

    Science.gov (United States)

    Guit, William J.; Fisher, Dominic

    2016-01-01

    Presentation reflects EOS Aura mission status, spacecraft subsystems summary, recent and planned activities, inclination adjust maneuvers, propellant usage, orbit maintenance maneuvers, conjunction assessment events, orbital parameters trends and predictions.

  16. Linkages between denitrification and dissolved organic matter quality, Boulder Creek watershed, Colorado

    Science.gov (United States)

    Barnes, Rebecca T.; Smith, Richard L.; Aiken, George R.

    2012-03-01

    Dissolved organic matter (DOM) fuels the majority of in-stream microbial processes, including the removal of nitrate via denitrification. However, little is known about how the chemical composition of DOM influences denitrification rates. Water and sediment samples were collected across an ecosystem gradient, spanning the alpine to plains, in central Colorado to determine whether the chemical composition of DOM was related to denitrification rates. Laboratory bioassays measured denitrification potentials using the acetylene block technique and carbon mineralization via aerobic bioassays, while organic matter characteristics were evaluated using spectroscopic and fractionation methods. Denitrification potentials under ambient and elevated nitrate concentrations were strongly correlated with aerobic respiration rates and the percent mineralized carbon, suggesting that information about the aerobic metabolism of a system can provide valuable insight regarding the ability of the system to additionally reduce nitrate. Multiple linear regressions (MLR) revealed that under elevated nitrate concentrations denitrification potentials were positively related to the presence of protein-like fluorophores and negatively related to more aromatic and oxidized fractions of the DOM pool. Using MLR, the chemical composition of DOM, carbon, and nitrate concentrations explained 70% and 78% of the observed variability in denitrification potential under elevated and ambient nitrate conditions, respectively. Thus, it seems likely that DOM optical properties could help to improve predictions of nitrate removal in the environment. Finally, fluorescence measurements revealed that bacteria used both protein and humic-like organic molecules during denitrification providing further evidence that larger, more aromatic molecules are not necessarily recalcitrant in the environment.

  17. Aqueous stability of gadolinium in surface waters receiving sewage treatment plant effluent Boulder Creek, Colorado

    Science.gov (United States)

    Verplanck, P.L.; Taylor, H.E.; Nordstrom, D.K.; Barber, L.B.

    2005-01-01

    In many surface waters, sewage treatment plant (STP) effluent is a substantial source of both regulated and unregulated contaminants, including a suite of complex organic compounds derived from household chemicals, pharmaceutical, and industrial and medical byproducts. In addition, STP effluents in some urban areas have also been shown to have a positive gadolinium (Gd) anomaly in the rare earth element (REE) pattern, with the Gd derived from its use in medical facilities. REE concentrations are relatively easy to measure compared to many organic wastewater compounds and may provide a more widely utilized tracer of STP effluents. To evaluate whether sewage treatment plant-associated Gd is a useful tracer of treatment plant effluent, an investigation of the occurrence, fate, and transport of rare earth elements was undertaken. The rare earth element patterns of four of five STP effluents sampled display positive Gd anomalies. The one site that did not have a Gd anomaly serves a small community, population 1200, with no medical facilities. Biosolids from a large metropolitan STP are not enriched in Gd even though the effluent is, suggesting that a substantial fraction of Gd remains in the aqueous phase through routine treatment plant operation. To evaluate whether STP-derived Gd persists in the fluvial environment, a 14-km study reach downstream of an STP was sampled. Gadolinium anomalies were present at all five downstream sites, but the magnitude of the anomaly decreased. Effluent from STPs is a complex mixture of organic and inorganic constituents, and to better understand the chemical interactions and their effect on REEs, the aqueous speciation was modeled using comprehensive chemical analyses of water samples collected downstream of STP input. These calculations suggest that the REEs will likely remain dissolved because phosphate and carbonate complexes dominate over free REE ions. This study supports the application of Gd anomalies as a useful tracer of urban wastewater.

  18. Health hazard evaluation determination report no. 78-14-476, Gerico, Inc. , Boulder, Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Gunter, B.J.

    1978-03-01

    An investigation to evaluate the exposures to aluminum oxide and other oil mist produced by hot wire cutting of polypropylene webbing has been made. The subject manufacturer makes backpacks for carrying infants, folding baby strollers, and folding baby beds. These items are made from tubular aluminum and polypropylene webbing. During this evaluation, workers that were monitored included those working in cutting, sewing, riveting and handling and aluminum tubing. All workers were monitored in the areas where the aluminum tubing was being sewed, cut, riveted, and handled. Sound level measurements were taken throughout this area. Each worker was interviewed, and questions were directed at work history and specific medical complaints. All breathing zone air samples were collected on filters using vacuum pumps operated at 1.5 liters per minute. A health hazard did not exist to either aluminum oxide or oil mist at the time of the evaluation. High noise levels were observed in numerous areas of the plant.

  19. 76 FR 93 - Summer Undergraduate Research Fellowships (SURF) NIST Gaithersburg and Boulder Programs...

    Science.gov (United States)

    2011-01-03

    ... conduct stem cell research adopt the ``National Institutes of Health Guidelines for Human Stem Cell... compliance, NIST will support and conduct research using only human embryonic stem cell lines that have been... previous Executive Orders and Presidential statements regarding the use of human embryonic stem cells...

  20. 77 FR 19177 - Beaverhead-Deerlodge National Forest, Jefferson Ranger District, Montana, Boulder River Salvage...

    Science.gov (United States)

    2012-03-30

    ...-commercially thin Douglas-fir and burn slash on 8,212 acres within 102 units. Approximately 210 miles of...; ] DEPARTMENT OF AGRICULTURE Forest Service Beaverhead-Deerlodge National Forest, Jefferson Ranger...

  1. 76 FR 59770 - BNSF Railway Company-Abandonment Exemption-in Boulder County, CO

    Science.gov (United States)

    2011-09-27

    ... raised by a party or by the Board's Office of Environmental Analysis (OEA) in its independent.... OEA will issue an environmental assessment (EA) by September 30, 2011. Interested persons may obtain a copy of the EA by writing to OEA (Room 1100, Surface Transportation Board, Washington, DC...

  2. 76 FR 2579 - Safety Zone; Lake Mead Intake Construction, Lake Mead, Boulder City, NV

    Science.gov (United States)

    2011-01-14

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Lake Mead Intake Construction, Lake Mead... establishing a safety zone on the navigable waters of Lake Mead in support of the construction project for Lake... the timing of the construction. Immediate action is necessary to ensure the safety of commercial...

  3. 75 FR 13232 - Safety Zone; Lake Mead Intake Construction, Lake Mead, Boulder City, NV

    Science.gov (United States)

    2010-03-19

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Lake Mead Intake Construction, Lake Mead... establishing a safety zone on the navigable waters of Lake Mead in support of the construction project for Lake... ensure the public's safety. Background and Purpose Vegas Tunnel Construction will be...

  4. 77 FR 35671 - Conformed Power Marketing Criteria or Regulations for the Boulder Canyon Project

    Science.gov (United States)

    2012-06-14

    ... Federal Register (49 FR 50582) on December 28, 1984. These 2012 Conformed Criteria establish general marketing principles for power generated at ] Federal projects under the marketing jurisdiction of Western's..., 1987. On December 28, 1984, Western published the 1984 Conformed Criteria (49 FR 50582) to...

  5. Complex Flow: Workshop Report; January 17-18, 2012, University of Colorado, Boulder

    Energy Technology Data Exchange (ETDEWEB)

    2012-06-01

    The Department of Energy's Wind Program organized a two-day workshop designed to examine complex wind flow into and out of the wind farm environment and the resulting impacts on the mechanical workings of individual wind turbines. An improved understanding of these processes will subsequently drive down the risk involved for wind energy developers, financiers, and owner/operators, thus driving down the cost of energy.

  6. Experiencia piloto: apoyo al aprendizaje de Administración I utilizando herramientas de educación a distancia en el Centro Regional de Tres Arroyos

    OpenAIRE

    Alvarez Gelves, Diego; Villarruel, Mónica; Scaramellini, Nora

    2009-01-01

    La experiencia se propone generar y evaluar experiencias sobre el uso de herramientas de Educación a Distancia que favorezcan el aprendizaje en el proceso de formación universitaria y contribuyan al mejoramiento de dichas estrategias. La educación ha mediatizado desde siempre la relación pedagógica a través de distintos medios y estrategias. No obstante, las restricciones de temporalidad y radicación, son un escollo a la hora de impartir educación universitaria. La aparición de nuevos ento...

  7. Compositional trends in Fe, Co and Ni sulfarsenides and their crystal-chemical implications: results from the Arroyo de la Cueva deposits, Ronda Peridotite, Southern Spain

    DEFF Research Database (Denmark)

    Hem, Skage Reidar; Makovicky, Emil; Gervilla, Fernando

    Fe-Co-Ni sulfarsenides, compositional trends, crystal chemistry, alloclasite, cobaltite, löllingite, pentlandite, pyrrhotite, smythite, Ronda Peridotite, Spain......Fe-Co-Ni sulfarsenides, compositional trends, crystal chemistry, alloclasite, cobaltite, löllingite, pentlandite, pyrrhotite, smythite, Ronda Peridotite, Spain...

  8. C-14 dates from a profile of Arroyo Tapalque, Buenos Aires Province, Argentina. Contribution to the chronology of faunal and environmental events

    International Nuclear Information System (INIS)

    Eleven radiocarbon dates were obtained from different materials in a stratigraphic section spanning the last 30,000 years. These new dates allow to calibrate different faunal and environmental events occurring in the area. (author)

  9. Rb/Sr and U/Pb isotopic ages in basement rocks of Mina Gonzalito and Arroyo Salado, Atlantic North-Patagonian Massif, Rio Negro, Argentina

    International Nuclear Information System (INIS)

    Isotopic ages from metamorphic and plutonic rocks of the Atlantic area of North Patagonian basement indicate that the main crustal tectonic events occurred during the late Proterozoic to early Paleozoic times. Rb/Sr and U/Pb data in the 550-470 Ma interval suggest an old tecto-thermal activity during the upper Brazilian Cycle (Rio Doce Orogeny). At regional scale, the comparable Neo proterozoic basement of Ventania and sedimentary for eland cover of Tandilia continues to the Northeast, in the Dom Feliciano Belt. A possible correlation of the North Patagonian basement with igneous-metamorphic relics of Central Argentina (Pampean Ranges of San Luis-Cordoba and at La Pampa province) is also indicated. (author)

  10. Influencia del cambio de uso del suelo sobre el escurrimiento superficial : Estudio de caso: Cuenca del Arroyo Napaleofú, provincia de Buenos Aires, Argentina

    OpenAIRE

    Senisterra, Gabriela Elba

    2014-01-01

    En los últimos 30 años el sector agropecuario de la Provincia de Buenos Aires experimentó una profunda transformación. El agro vivió un intenso proceso caracterizado por una mayor eficiencia en el uso de los factores productivos, acompañado por la adopción de cambios técnicos y por el desarrollo de nuevas formas de producción. Los planteos productivos se concentraron en pocos cultivos de alta productividad y homogeneidad genética, que a la par de maximizar la producción y la rentabilidad, sim...

  11. Fluctuations in late Neoproterozoic atmospheric oxidation - Cr isotope chemostratigraphy and iron speciation of the late Ediacaran lower Arroyo del Soldado Group (Uruguay)

    DEFF Research Database (Denmark)

    Frei, Robert; Gaucher, Claudio; Stolper, Daniel;

    2013-01-01

    -Cambrian boundary, paleoceanographic conditions resembled more those of Paleoproterozoic oceans than Phanerozoic and present oceans. This highlights the sheer magnitude of ecological changes at the Precambrian-Cambrian transition, changes which ultimately led to the demise of the Precambrian world and the birth of...

  12. Revisions to the stratigraphic nomenclature of the Abiquiu Formation, Abiquiu and contiguous areas, north-central New Mexico

    Science.gov (United States)

    Maldonado, Florian; Kelley, Shari A.

    2009-01-01

    Stratigraphic studies and geologic mapping on the Abiquiu 7.5-min quadrangle have led to revision of the stratigraphic nomenclature for the Oligocene to Miocene Abiquiu Formation in north-central New Mexico. The Abiquiu Formation had previously been defined to include informal upper, middle (Pedernal chert member), and lower members. The basement-derived conglomeratic lower member in the northern Jemez Mountains and Abiquiu embayment is here redefined. We propose removing the "lower member" from the Abiquiu Formation because provenance of these coarse sediments is dramatically different than the volcaniclastic strata of the "upper member." Furthermore, we propose that the term "lower member of the Abiquiu Formation" be replaced with an existing unit name, the Ritito Conglomerate of Barker (1958), and that the name Abiquiu Formation be restricted to the volcaniclastic succession. The lower part of the Ritito Conglomerate in Arroyo del Cobre on the Abiquiu quadrangle is 47 m (155 ft) thick and is composed of arkosic conglomeratic beds interbedded with arkosic sands and siltstones. Clasts include, in descending order of abundance, Proterozoic quartzite, granite, metavolcanic rocks, quartz, schist, and gneiss and a trace of Mesozoic sandstone and Paleozoic chert. Clasts are predominantly of pebble and cobble size but range from granule to boulder size. Paleocurrent data collected in the Arroyo del Cobre area indicate that the Ritito Conglomerate was deposited by a south-flowing river system during the Oligocene, eroding Laramide highlands such as the Tusas Mountains to the northeast, which contain predominantly Proterozoic rocks. This depositional setting has also been suggested by previous workers. The middle member or Pedernal chert member is present both at the top of the Ritito Conglomerate and as lenses within the lower part of the Abiquiu Formation. This post-depositional diagenetic chert remains an informal unit called the Pedernal chert.

  13. Receptivity to Library Involvement in Scientific Data Curation: A Case Study at the University of Colorado Boulder

    Science.gov (United States)

    Lage, Kathryn; Losoff, Barbara; Maness, Jack

    2011-01-01

    Increasingly libraries are expected to play a role in scientific data curation initiatives, i.e., "the management and preservation of digital data over the long-term." This case study offers a novel approach for identifying researchers who are receptive toward library involvement in data curation. The authors interviewed researchers at the…

  14. BBASIN_UNGEOG.TIF - Unenhanced TIFF Sidescan-Sonar Mosaic of Boulder Basin - Lake Mead, Nevada: Geographic Coordinates

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Lake Mead is a large interstate reservoir located in the Mojave Desert of southeastern Nevada and northwestern Arizona. It was impounded in 1935 by the construction...

  15. Modified Level III Preacquisition Environmental Contaminants Survey for Rocky Flats Environmental Technology Site, Jefferson and Boulder Counties, Colorado

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This is one of several important historical documents associated with remediation activities at the Rocky Flats National Wildlife Refuge. The Rocky Flats National...

  16. The outcome of protoplanetary dust growth: pebbles, boulders, or planetesimals? I. Mapping the zoo of laboratory collision experiments

    CERN Document Server

    Güttler, Carsten; Zsom, Andras; Ormel, Chris W; Dullemond, Cornelis P

    2009-01-01

    The growth processes from protoplanetary dust to planetesimals are not fully understood. Laboratory experiments and theoretical models have shown that collisions among the dust aggregates can lead to sticking, bouncing, and fragmentation. However, no systematic study on the collisional outcome of protoplanetary dust has been performed so far so that a physical model of the dust evolution in protoplanetary disks is still missing. We intend to map the parameter space for the collisional interaction of arbitrarily porous dust aggregates. This parameter space encompasses the dust-aggregate masses, their porosities and the collision velocity. With such a complete mapping of the collisional outcomes of protoplanetary dust aggregates, it will be possible to follow the collisional evolution of dust in a protoplanetary disk environment. We use literature data, perform own laboratory experiments, and apply simple physical models to get a complete picture of the collisional interaction of protoplanetary dust aggregates....

  17. 75 FR 21037 - Notice of Realty Action: Proposed Non-Competitive (Direct) Sales of Public Lands, Boulder County, CO

    Science.gov (United States)

    2010-04-22

    ..., Royal Gorge Field Office, 3028 East Main Street, Canon City, Colorado 81212. FOR FURTHER INFORMATION... Transaction Facilitation Act (FLTFA), Public Law 106-248, enacted on July 25, 2000. FLTFA provides for the use... Building Contractors, c/o Duane Kraft. Federal law requires purchasers to be: Citizens of the United...

  18. Mass and Spin Measurement Techniques (for the Large Hadron Collider):. Lectures Given at TASI 2011, Boulder, Colorado

    Science.gov (United States)

    Lester, Christopher G.

    2013-12-01

    For TASI 2011, I was asked to give a series of lectures on "Mass and Spin Measurement Techniques" with relevance to the Large Hadron Collider. This document provides a written record of those lectures - or more precisely of what I said while giving the lectures - warts and all. It is provided as my contribution to the proceedings primarily for the benefit of those who heard the lectures first hand and may wish to refer back to them. What it is not is a scientific paper or a teaching resource. Though lecture slides may be prepared in advance, what is actually said in a lecture is usually extemporaneous, may be partial, can be influenced by audience reaction, and may not even make sense without a visual record of the concomitant gesticulations of the lecturer. More worryingly, some of the statements made may be down-right false, if the lecturer's tongue is in a twist. Accordingly, these proceedings are provided without warranty of any kind - not least in respect of accuracy or impartiality. The lectures were intended to engage the audience and get them thinking about a number of topics that they had not seen before. They were not expected to be the sort of sombre or well-balanced overview of the field that one might hope to achive in a review. These proceedings are provided to jog the memory of those who saw the lectures first hand, and for little other purpose. Footnotes, where they appear, indicate text/thoughts I have added during the editing process that were not voiced during the lectures themselves. Copies of the lecture slides are inserted at approximately the locations they would have become visible in the lectures.

  19. Nuevos registros del parásito Probopyrus pacificensis (Isopoda: Bopyridae en el sur de Nayarit y norte de Jalisco, México New records of the parasite Probopyrus pacificensis (Isopoda: Bopyridae in southern Nayarit and northern Jalisco, Mexico

    Directory of Open Access Journals (Sweden)

    Alberto Ocaña-Luna

    2009-04-01

    Full Text Available Se presentan nuevos registros de Probopyrus pacificensis en el arroyo San Francisco, sur de Nayarit y en el arroyo Palo María, norte de Jalisco en el Pacífico mexicano, parasitando a camarones de agua dulce de la especie Macrobrachium tenellum.New observations of Probopyrus pacificensis were recorded in Arroyo San Francisco, southern Nayarit, and Arroyo Palo María, northern Jalisco, in the Mexican Pacific, infesting the freshwater shrimp Macrobrachium tenellum.

  20. The ancient sun: Fossil record in the earth, moon and meteorites; Proceedings of the Conference, Boulder, CO, October 16-19, 1979

    Science.gov (United States)

    Pepin, R. O. (Editor); Eddy, J. A.; Merrill, R. B.

    1980-01-01

    Papers are presented concerning theories of solar variability and their consequences for luminosity, particle emission and magnetic field changes within the past 4.5 billion years, and on the records of such solar behavior in lunar, meteoritic and terrestrial materials. Specific topics include the neutrino luminosity of the sun, the relation of sunspots to the terrestrial climate of the past 100 years, solar modulation of galactic cosmic rays, the historical record of solar activity, C-14 variations in terrestrial and marine reservoirs, and solar particle fluxes as indicated by track, thermoluminescence and solar wind measurements in lunar rocks. Attention is also given to the spin-down of the solar interior through circulation currents and fluid instabilities, grain surface exposure models in planetary regoliths, rare gases in the solar wind, nitrogen isotopic variations in the lunar regolith, the influence of solar UV radiation on climate, and the pre-main sequence evolution of the sun and evidence of the primordial solar wind in the electromagnetic induction heating of the asteroids and moon.

  1. Sport labor migration, globalization and dual-career : case study of international student-athletes in University of Colorado at Boulder

    OpenAIRE

    Nurmi, Veera

    2014-01-01

    Sport, education, labor migration and globalization are all current areas of research worldwide. The U.S. has a unique system of making the dual-career option possible by having the college sport league organized by the non-profit association National Collegiate Athletic Association. The labor migration has increased in the past years. The primary research question in this study is, in which ways sport labor migration, globalization and dual-career are illustrated in the case study school ...

  2. Workshop review: Management of data collected in GRAMP (Gulf Region Atmospheric Measurement Program). Held in Boulder, Colorado on July 22-24, 1991. Technical note

    International Nuclear Information System (INIS)

    The demolition and subsequent burning of the Kuwait oil fires was a senseless act of destruction that has threatened public health, damaged the environment, and may possibly cause short or longer term changes in regional and global climate. Many nations responded to this disaster by offering aid and by rushing teams into the affected area to make measurements that would assess the impact of the fires. The following report summarizes a workshop that was held July 24-26, 1991 at the National Center for Atmospheric Research (NCAR) to discuss a plan to gather all the atmospheric measurements that are being made in the Gulf region and make them available for general dissemination. The workshop was initiated by the World Meteorological Organization and co-sponsored by the National Oceanic and Atmospheric Organization

  3. Memory maps: two rural judges listing the inhabitants of their district and his economics activities (Pago de los Arroyos, Santa Fe del Río de la Plata, 1738)

    OpenAIRE

    Darío Gabriel Barriera

    2014-01-01

    The Christmas eve of 1734, a fire devastated the Royal Alcazar of Madrid, headquarters of the Royal family and of the Court. Felipe V ordered build in its place a Palace. To cover the costs, demanded a contribution to the cities of the monarchy. This text examines one of the consequences of this exigeance: listing the population of the south of Santa Fe, the rural judges made a padrón de pobladores. The author discuses hipothesys about the population of this territory and propose contribution...

  4. Memory maps: two rural judges listing the inhabitants of their district and his economics activities (Pago de los Arroyos, Santa Fe del Río de la Plata, 1738

    Directory of Open Access Journals (Sweden)

    Darío Gabriel Barriera

    2014-12-01

    Full Text Available The Christmas eve of 1734, a fire devastated the Royal Alcazar of Madrid, headquarters of the Royal family and of the Court. Felipe V ordered build in its place a Palace. To cover the costs, demanded a contribution to the cities of the monarchy. This text examines one of the consequences of this exigeance: listing the population of the south of Santa Fe, the rural judges made a padrón de pobladores. The author discuses hipothesys about the population of this territory and propose contributions about two others fields: the study of the minor judges and the study of the governamental technics at 18 century

  5. Investigación de la contaminación en el acuífero freático : Cuenca de los arroyos Martín-Carnaval: Buenos Aires, Argentina.

    OpenAIRE

    González, Nilda; Hernández, Mario Alberto; Ruiz de Galarreta, Alejandro

    1999-01-01

    Se dan a conocer los resultados de un diagnóstico preliminar acerca de la contaminación del acuífero freático, a través de la determinación del contenido en nitratos, nitritos, hidrocarburos totales, metales pesados (Cd, Cr, Pb, Zn, Cu), plaguicidas organoclorados (ocho especies o combinaciones) y fosforados (once especies o combinaciones).Como esta contribución forma parte de un Proyecto más amplio, se contó con el conocimiento del marco hidroclimático, edafológico, geohidrodinámico e hidroq...

  6. Los pobladores productores de alimentos en las Sierras de Córdoba. Primeras evidencias arqueobotánicas en los sitios Arroyo Tala Cañada 1 y C.Pun. 39

    Directory of Open Access Journals (Sweden)

    María Laura López

    2005-12-01

    Full Text Available Los grupos prehispánicos tardíos que ocuparon las Sierras de Córdoba entre ca. 1200- 300 AP se caracterizaron por poseer una estrategia predominantemente agrícola, que se complementaba con el pastoreo y la caza- recolección (Berberián y Roldán 2001; Pastor y Medina 2003, 2004. Sin embargo, no se realizaron hasta el presente estudios específicos sobre restos arquebotánicos que hayan aportado un panorama acerca del aprove- chamiento de vegetales silvestres y/o cultivados. Por el contrario, el conocimiento sobre el empleo de estos recursos provino de evidencias indirectas, como la ubicación de las bases residenciales en terrenos potencialmente cultivables, la presencia de sitios pequeños al aire libre interpretados como campos de cultivo (Berberián y Roldán 2001; Medina y Pastor 2004 y el hallazgo de instrumentos relacio- nados con el laboreo agrícola (azuelas y con la molienda de granos (conanas y morteros.

  7. Aplicación de índices de calidad de agua en un arroyo pampeano utilizando macroinvertebrados bentónicos como bioindicadores (Gualeguaychú, Entre Ríos, Argentina)

    OpenAIRE

    Crettaz-Minaglia, Melina C.; Juárez, Ricardo; Aguer, Irene; Borro, Esteban; Peruzzo, Rubén

    2014-01-01

    Water quality can be evaluated through a set of physical, chemical and environmental variables that characterize the water body under study. These variables, along with the climate impact,hydrological regime and land use, determine the diversity of organisms. Santa Barbara Stream is a loworder stream and is located in the Gualeguaychú Departament, Entre Ríos, in the Pampean Ecorregion. In order to study the water quality, benthonic macroinvertebrates and physical chemical variables were studi...

  8. Nuevas investigaciones sobre la ocupación prehispánica de la costa pampeana en el Holoceno tardío: el sitio arqueológico Claromecó 1 (partido de Tres Arroyos, provincia de Buenos Aires New Research On The Prehispanic Occupation Of The Pampean Coast During The Late Holocene: Claromecó 1 Archaeological Site (Tres Arroyos, Buenos Aires Province.

    Directory of Open Access Journals (Sweden)

    Mariano Bonomo

    2008-12-01

    Full Text Available Los materiales arqueológicos disponibles para entender la ocupación holocénica del litoral marítimo pampeano están constituidos casi exclusivamente por artefactos líticos depositados en la superficie de la faja de médanos. En tal situación, el sitio Claromecó 1 (CL1 se destaca por su posición en estratigrafía y la preservación de restos óseos que permitió establecer su cronología. En este artículo se presentan los resultados del análisis de los materiales líticos, cerámicos y faunísticos allí recuperados. A partir de los distintos estudios realizados, se aborda la historia tafonómica, la estacionalidad, la explotación faunística, y la tecnología lítica y cerámica. Los resultados del análisis lítico indican que se han tallado mediante la técnica bipolar elevadas proporciones de rodados costeros. Estas características de los recursos líticos utilizados diferencian a este conjunto de la mayoría de los sitios de la llanura pampeana. Aun así, al igual que en los sitios del interior, los estudios faunísticos señalan que en CL1 se aprovecharon animales de origen continental. Por último, la información obtenida muestra que CL1 fue un campamento ocupado por cazadores-recolectores prehispánicos durante el Holoceno tardío.The archaeological materialsavailable for understanding the Holocene human occupation of the Pampean coast consist almost exclusively of lithic artifacts deposited on the surface of dune strips. In this context Claromecó 1 (CL1 archaeological site stands out because of its stratigraphic position and the preservation of bone material, which allowed us to establish a chronology. In this paper, the results obtained from the lithic, ceramic and faunal analyses carried out at the site are presented. Lithic and pottery technology, taphonomical history, stationality, and faunal exploitaition were all examined using these different approaches. The results of the lithic analysis suggest that a high proportion of coastal pebbles were knapped using the bipolar technique. The characteristics of the lithic resources used at CL1 distinguish this assemblage from most of the sites on the Pampean plains. However, as with sites in the interior, the faunal research shows that in CL1 the origin of the exploited fauna was continental. Finally, the information obtained indicates that CL1 was a campsite occupied by pre-Hispanic hunter-gatherers during the late Holocene.

  9. Parámetros protéicos del plasma seminal y su relación con la calidad del semen en toros de la raza nelore (bos taurus indicus)

    OpenAIRE

    Ana Sánchez; Marcelo Mungai; Nelson Machado

    2006-01-01

    El propósito de este estudio fue investigar la presenciae incidencia de bandas proteicas específicas delplasma seminal en toros Nelore, completa y parcialmente aptos para la actividad reproductiva. Se utilizaron 68 ejemplares; 20 de variedad Padrón y 48 Mochos, con edad media de 4 años. En el perímetro escrotal (35,05±0,49 cm e 33,30±0,39cm), índice de masa corpórea (302,62±5,87 e 284,19±5,15Kg|m2 ) hubo diferencia (p<0,05) entre las variedades Padrón y Mocho, respectivamente. Con respecto...

  10. Integrated coastal management in Uruguay

    International Nuclear Information System (INIS)

    Integrated coastal management in Uruguay Carmelo includes the following areas-Nueva Palmira challenges and opportunities for local development in a context of large-scale industrial (Conchillas Uruguay), coastal management and stream Arroyo Solis Solis Chico Grande, Punta Colorada and Punta Negra, Maldonado Province Arroyo Valizas and sustainable tourism.

  11. 78 FR 12714 - Intermountain Region, Payette National Forest, New Meadows Ranger District, Idaho; Lost Creek...

    Science.gov (United States)

    2013-02-25

    ... District, Idaho; Lost Creek-Boulder Creek Landscape Restoration Project AGENCY: Forest Service, USDA... Creek-Boulder Creek Landscape Restoration Project. The Lost Creek- Boulder Creek Landscape Restoration... action alternative is selected, the Responsible Official will determine what design features,...

  12. Modélisation en champ proche de l’interaction entre sol et bloc rocheux

    OpenAIRE

    Zhang, Lingran

    2015-01-01

    The prediction of boulder trajectory and the design of protection structures are particularly two main interests of rockfall engineering. The prediction of boulder trajectory largely depends on the bouncing of the boulder, and the design of protection structures, such as embankments, are closely related to the impact force on the boulder.Based on this background, the thesis deals with the interaction between a boulder and a granular medium as well as the bouncing of a boulder on a granular me...

  13. Book Review of "Being Brown in Dixie: Race, Ethnicity, and Latino Immigration in the New South" 2011. Boulder, Colorado: FirstForumPress, by Cameron D. Lippard and Charles A. Gallagher, eds

    Directory of Open Access Journals (Sweden)

    Rachel Madsen

    2011-11-01

    Full Text Available Moving with the prospect of employment in the US, there has been an influx of migrants from Latin America since the 1990s that has introduced many populations in the South to unfamiliar neighbors. Consequently, a dimension has been added to the long-existing racial turmoil between whites and blacks in these southern states: a "brown" dimension.

  14. STUDY ON REDUCTION OF TOE ROCKS AND BOULDERS IN BENCH BLASTING IN THE KARST FORMATION BAUXITE%减少喀斯特岩层铝土矿台阶爆破根底和大块的研究

    Institute of Scientific and Technical Information of China (English)

    陈寿如; 毛晖; 张劲松; 赵坤

    2003-01-01

    喀斯特岩层铝土矿的主要特点是岩溶洞、岩溶水多,裂隙发育,岩层和泥层相夹等,这些特点使露天台阶爆破中出现较多的根底和大块.试验中通过采取一系列技术措施,如空气间隔装药、合适的孔网参数、孔底起爆、增加炸药密度及改进药包包装等,取得了良好的爆破效果.文中介绍了试验方法及试验结果的分析.

  15. Uranium hydrogeochemical and stream sediment reconnaissance data listing release for the Three Forks Basin, Spanish Peaks, and Boulder River areas for the Bozeman NTMS quadrangle, Montana, including concentrations of forty-six additional elements

    International Nuclear Information System (INIS)

    Totals of 531 water and 1275 sediment samples were collected from 1275 stream and spring locations. Elemental concentration, field measurement, weather, geologic, and geographic data for each sample location are listed for waters and for sediments. Uranium/thorium ratios for sediment samples are also included. Water samples were initially analyzed for uranium by fluorometry. All water samples containing more than 40 ppB uranium were reanalyzed by delayed-neutron counting (DNC). All sediments were analyzed for uranium by DNC. Other elemental concentrations in sediments were determined by neutron activation analysis for 31 elements (Al, Sb, Ba, Ca, Ce, Cs, Cl, Cr, Co, Dy, Eu, Au, Hf, Fe, La, Lu, Mg, Mn, K, Rb, Sn, Sc, Na, Sr, Ta, Tb, Th, Ti, V, Yb, and Zn), by x-ray fluorescence for 13 elements (As, Bi, Cd, Cu, Pb, Mo, Ni, Nb, Se, Ag, Sn, W, and Zr), and by arc-source emission spectrography for Li and Be. Analytical results for sediments are reported as parts per million

  16. USA luure : Fidel Castro on suremas / Allan Espenberg

    Index Scriptorium Estoniae

    Espenberg, Allan

    2006-01-01

    Kuuba president Fidel Castro, Haiti president Rene Preval, Filipiinide president Gloria Macapagal-Arroyo, Türkmenistani president Saparmurat Nijazov, Guinea president Lansana Conte ja Itaalia ekspeaminister Silvio Berlusconi, Sambia ekspresident Frederick Chilubaga võitlevad terviseprobleemidega

  17. Merbromin poisoning

    Science.gov (United States)

    ... Poisoning and Drug Overdose . 4th ed. Philadelphia, PA: Elsevier Saunders; 2007:chap 71. Linakis JG, Skarbek-Borowska S. ... Poisoning and Drug Overdose . 4th ed. Philadelphia, PA: Elsevier Saunders; 2007:chap 18. Rusyniak DE, Arroyo A, ...

  18. The Iconography of Painted Ceramics from the Northern Andes Title: La iconografía de la cerámica pintada del norte de los Andes

    OpenAIRE

    Felipe Cárdenas-Arroyo

    1998-01-01

    Felipe Cárdenas-Arroyo, arqueólogo colombiano de la Universidad de Los Andes en Bogotá, erudito de CASVA, especialista en momificación pre-hispánica de huesos humanos.Abstract: Felipe Cárdenas-Arroyo, Colombian archaeologist from the University of Los Andes in Bogotá, CASVA scholar, specialist in pre-Hispanic mummification and human bone.

  19. AcEST: BP919953 [AcEST

    Lifescience Database Archive (English)

    Full Text Available VU RNA-directed RNA polymerase OS=Whitewater arroyo virus (isolate Rat/United Sta...ymerase OS=Whitewater arroyo virus (isolate Rat/United States/AV 9310135/1995) GN=L PE=3 SV=1 Length = 2219 ...ed RNA polymerase OS=Tamiami virus (isolate Rat/United States/W 10777/1964) GN=L

  20. Melanophryniscus stelzneri fulvoguttatus (Anura: Bufonidae). Primera cita para la provincia de Santa Fe, Argentina

    OpenAIRE

    Baldo, Jorge L.; Arzamendia, Yanina

    1998-01-01

    República Argentina, provincia de Santa Fe, desembocadura del Arroyo El Sombrerito en el Arroyo Los Amores, 28° 43' S, 59° 27' W, Departamento General Obligado. Tres ejemplares adultos, depositados en el Museo de Zoología, F.C.E.F y N. (U.N.C.), números MZUC.2121:91, MZUC.2121:92 y MZIJC.2121:93. Colectados por Jorge L. Baldo y Yanina Arzamendia, el 4/V/1997.

  1. Dinámica espacial de la tierra en la cuenca del arroyo de la Figuera - São Manuel (SP Dinâmica espacial do uso da terra na microbacia do Córrego da Figueira - São Manuel (SP

    Directory of Open Access Journals (Sweden)

    Flávia Meinicke Nascimento

    2012-06-01

    Full Text Available

    Este trabalho teve como objetivo caracterizar a evolução do uso e ocupação do solo no período de 20 anos, bem como verificar as possíveis áreas de conflito de uso do solo em APP ocorrentes na Microbacia do Córrego da Figueira – Município de São Manuel (SP, obtidas de imagens de satélite por meio do aplicativo Carta Linx e do SIG-Idrisi; tendo como base cartográfica as imagens de satélite Landsat 5, bandas 3; 4 e 5, órbita 220, ponto 76, quadrante A, passagens 1990 e 2010. Os resultados mostraram que o SIG Idrisi Andes 15.0 foi eficiente na identificação e mapeamento das áreas de uso da terra, facilitando o processamento dos dados. A área ocupada predominantemente pela cultura canavieira mostrou que as alterações espaço-temporal praticamente não ocorreram nos últimos 20 anos. O mapeamento das áreas de conflito de uso permitiu verificar que a área de estudo está bem preservada, sendo o conflito inexpressivo, pois o relevo plano a ondulado da Microbacia é totalmente favorável para o cultivo da cana-de-açúcar. Os resultados permitiram inferir que as classes de declive de 0 a 3% e de 3 a 6% representam mais de 84% da área e as de 0 a 20% predominaram em quase 100% da microbacia.

    Este estudio tuvo como objetivo caracterizar la evolución del uso y ocupación del suelo dentro de los 20 años, y determinar las posibles áreas de conflicto de uso del suelo tierra en APP que ocurre en la Cuenca del corego de la Figueira - Municipio de SãoManuel (SP, obtenido a partir de imágenes de satelitales a través de la aplicación del aplicativo Carta Linux y del SIG Idrisi: teniendo por base cartográfica imágenes del satélite Landsat 5, bandas 3, 4 y 5, la órbita 220, punto 76, en el cuadrante A, pasajes 1990 y 2010. Los resultados mostraron que el SIG Idrisi Andes - 15,0 fue eficaz en la identificación y mapeo del uso del suelo, facilitando el tratamiento de los datos. El área predominantemente ocupada por la caña de azúcar mostró que los cambios espacio-temporales casi no se produjeron en los últimos 20 años. El mapeo de las zonas de conflicto de uso demostró que el área de estudio está bien conservada, siendo el conflicto insignificante, debido a que el relieve del terreno es llano a ondulado de la Cuenca es totalmente favorable para el cultivo de la caña de azúcar. Los resultados mostraron que las clases de pendiente 0-3% y 3-6% representan más del 84% de la superficie y el 0-20% predominó en casi el 100% de la cuenca.

  2. Al territorio, por el camino de la memoria: dos jueces rurales evocan y listan a los habitantes de su jurisdicción y sus actividades económicas (Pago de los Arroyos, Santa Fe del Río de la Plata, 1738)

    OpenAIRE

    Barriera, Dario

    2014-01-01

    En la nochebuena de 1734, un feroz incendio devastó el Real Alcázar de Madrid, sede de la familia Real y de la Corte. Felipe V ordenó levantar en su lugar un Palacio y, para sufragar los gastos de su fabricación, exigió contribuciones a todas las partes del cuerpo de la monarquía. Este artículo examina una de las miles de secuelas microscópicas desatadas por la Real Cédula firmada por Felipe V que ordenaba recaudar ese dinero: el empadronamiento de los habitantes ubicados en las campañas al s...

  3. Evaluación de la distribución de la materia orgánica del horizonte superficial del suelo mediante el uso de imágenes satelitales. Aplicación de metodología SIG. Caso : cuencaq del arroyo Sanchez - Uruguay

    OpenAIRE

    Achkar, Marcel

    2005-01-01

    Le contexte environnemental et la mutation agricole soumettent les sols à une importante érosion, qui se traduit notamment par un transfert de la matière organique (MO) vers les réseaux de drainage. Le SIG et la télédétection sont particulièrement bien adaptés pour les études de comportement de systèmes naturels, sols et végétation. Ce travail analyse, avec des données de télédétection multitemporelles – multirésolutions et un SIG, l'évolution de la productivité végétale, la distribution de l...

  4. Ecología trófica del jabalí europeo (Sus scrofa) silvestre en Chile Trophic ecology of the wild boar (Sus scrofa) in Chile

    OpenAIRE

    ÓSCAR SKEWES; ROBERTO RODRÍGUEZ; FABIÁN M. JAKSIC

    2007-01-01

    Documentamos la dieta del jabalí silvestre en el centro-sur de Chile basados en el examen de 20 estómagos colectados en los faldeos de volcán Mocho-Choshuenco (39°54' S, 72°02' O) y en el Parque Nacional Vicente Pérez Rosales (41°03' S, 71°54' O). La dieta está representada por animales, vegetales y hongos. Entre los vegetales y hongos son consumidas tanto las partes epígeas como hipógeas, lo mismo que frutos y semillas. Hongos y rizomas de Gunnera tinctoria constituyen ítemes vegetales cuant...

  5. El jabalí europeo (Sus scrofa): Un invasor biológico como presa reciente del puma (Puma concolor) en el sur de Chile The European wild boar (Sus scrofa): A biological invader as a recent prey of the American puma (Puma concolor) in southern Chile

    OpenAIRE

    OSCAR SKEWES; CLAUDIO A MORAGA; PATRICIO ARRIAGADA; Rau, Jaime R.

    2012-01-01

    Se estudió la dieta del puma (Puma concolor)en los anos 1988 y 2004 en los faldeos de los volcanes Mocho y Choshuenco, pluviselva valdiviana, sur de Chile, a través de la identificación de ítemes-presas en sus heces y la búsqueda en terreno de carcasas de jabalí europeo (Sus scrofa).Se registra por primera vez al jabalí europeo entre los ítemes-presas del puma en Chile. El puma depredó predominantemente sobre juveniles y los porcentajes de consumo variaron entre un 17-37 % dependiendo del mét...

  6. El jabalí europeo (Sus scrofa: Un invasor biológico como presa reciente del puma (Puma concolor en el sur de Chile The European wild boar (Sus scrofa: A biological invader as a recent prey of the American puma (Puma concolor in southern Chile

    Directory of Open Access Journals (Sweden)

    OSCAR SKEWES

    2012-06-01

    Full Text Available Se estudió la dieta del puma (Puma concoloren los anos 1988 y 2004 en los faldeos de los volcanes Mocho y Choshuenco, pluviselva valdiviana, sur de Chile, a través de la identificación de ítemes-presas en sus heces y la búsqueda en terreno de carcasas de jabalí europeo (Sus scrofa.Se registra por primera vez al jabalí europeo entre los ítemes-presas del puma en Chile. El puma depredó predominantemente sobre juveniles y los porcentajes de consumo variaron entre un 17-37 % dependiendo del método empleado para analizar el contenido de presas presentes en sus heces.The diet of the American puma (Puma concolorwas studied in 1988 and 2004 in the foothills of the volcanoes Mocho and Choshuenco, Valdivian rainforest, southern Chile, through the identification of prey-items in their feces and field surveys of European wild boar (Sus scrofacarcasses. We reported for the first time the invader European wild boar as a puma's prey in Chile. The puma preys mainly on juveniles and its percentage of consumed prey ranges between 17 and 37 % according to the method employed to assess the analyses of their feces prey contents.

  7. 78 FR 20334 - Changes in Flood Hazard Determinations

    Science.gov (United States)

    2013-04-04

    ... index.php/alabama/ Gulf Shores, P.O. West 1st Street, baldwin/. Box 299, Gulf Gulf Shores, AL Shores, AL..., Mayor, Broadway Street, index.php/colorado/ City of Boulder, Boulder, CO 80302. boulder/. P.O. Box 791... and index.php/colorado/ 0863P). Jefferson County Zoning, 100 jefferson-5/. Board of Jefferson...

  8. Members of the Science and Technology Commission, Spanish Senate

    CERN Document Server

    Maximilien Brice

    2002-01-01

    Photo 01: (left to right) Mr Francisco Xabier Albistur, Senator; Mrs Mercedes Senen, Lawyer of the Commission; Mr Ramon Antonio Socias, Second Vice-President of the Commission; Prof. Luciano Maiani, CERN Director-General, Mr Alonso Arroyo, President of the Commission, signing the VIP visitors' book; and Mr Adolfo Abejon, Senator. Photo 02: Mr Alonso Arroyo, President of the Commission, signing the VIP visitors' book. Photos 03, 04: Mr Ramon Antonio Socias, Second Vice-President of the Commission, signing the VIP visitors' book; and Mr Adolfo Abejon, Senator. Photo 05: Mr Francisco Xabier Albistur, Senator, signing the VIP visitors' book. Photo 06: Mrs Mercedes Senen, Lawyer of the Commission, signing the VIP visitors' book. Photo 07: (left to right) Mr Francisco Xabier Albistur, Senator; Prof. Juan Antonio Rubio, Education and Technology Transfer Division Leader; Prof. Luciano Maiani, CERN Director-General; Mr Ramon Antonio Socias, Second Vice-President of the Commission; Mr Alonso Arroyo, President of the C...

  9. Uruguay geology contributions no. 7

    International Nuclear Information System (INIS)

    Arroyo Grande Formation (Lower Precambrian) are intruded by several granitoid bodies.The Marincho complex are represented by: a) a main unit integrated by hornblende diorites to monzoqranites, the main facies is a biotitic-hornblenditic granodiorite; b) An unconformable belt of porphyroblastics hornblendites and related granodiorites in complex relationships; c) A unit characterized by a two mica granite heterogranular to porphyritic wich cuts the previous sets; d) a little intrusion of gross leucogranite.The granodiorite of Arroyo Grande shows to be a apophysis to NW 01 Marincho Complex, being the most frecuent lacies a hornblende-biotite-granodiorite.The petrographic diagrams shows evolutive lines, suggesting different origins tor the main granodiorite, the Arroyo Grande granodiorite south granite and the hornbledites.

  10. Late Glacial-Holocene climatic transition record at the Argentinian Andean piedmont between 33-34° S

    Science.gov (United States)

    Mehl, A. E.; Zárate, M. A.

    2013-10-01

    The Arroyo La Estacada (~33°28' S, 69°02' W), eastern Andean piedmont of Argentina, cuts through an extensive piedmont aggradational unit composed of a dominant late Pleistocene-early Holocene (LP-EH) alluvial sequence including several paleosols. The arroyo sedimentary record exhibits a paleosol developed affecting the topmost part of likely Lateglacial aeolian deposits aggraded into a floodplain environment by the end of the late Pleistocene. The paleosol shows variable grade of development in the outcrops along the arroyo probably in relation to fluvial valley paleotopography. Organic matter humification, carbonate accumulation and redox processes were the dominant processes associated with paleosol formation. By the early Holocene, when the formation of the paleosol ended, alluvial aggradation renewed and a higher frequency of flooding events could have affected the arroyo's floodplain environment. A period of relative landscape stability in the Arroyo La Estacada basin is inferred from the paleosol developed by the LP-EH transition in response to a climatic amelioration in the Andes cordillera piedmont after the Late Glacial arid conditions. The renewal of early Holocene alluvial aggradation was probably influenced by the South American Monsoon and resulted in a change in the sedimentary dynamics of the arroyo. The analyzed Late Glacial-Holocene alluvial record of the Andean piedmont constitutes a suitable record of the LP-EH climatic transition at the extra Andean region of Argentina. It is in agreement with regional paleoclimatic evidence along the southern tip of the South American continent, where other sedimentary sequences record similar late Quaternary paleoenvironmental changes over both fluvial and interfluvial areas.

  11. Uruguay geology contributions no. 8

    International Nuclear Information System (INIS)

    The mineralogical and chemical studies and the thermodynamic conditions evaluated permit to represent different stability diagrams of the ferromagnesian minerals of the main units of the Marincho Complex, and of the Arroyo Grande granodiorite. The geochemical and thermodynamics characteristics allow to establish different evolutionary models. It suppose that the granodiorite of the main unit and the granodiorites associated with the porphyroblastic hornblendites derive from magmatic differentiation by fractional crystallization. The same process is considered for the granodiorite of Arroyo Grande, although the magma source is different.

  12. Estudio de la flora y la vegetaciòn del bosque en la estaciòn de primates Coloso-Sucre

    OpenAIRE

    Fernández Alonso José Luis; Rangel Churio Jesús Orlando; Patiño Uribe Ruben Dario

    2003-01-01

    El estudio se realizó en Coloso, Sucre, en la planicie del litoral Caribe, se efectuaron muestreos enla zona del arroyo el “Sereno” de la estación de primates. Se realizaron 14 levantamientos,utilizando el método de parcela y subparcelas, de 50 x 10 m2. Se censaron indivuidos con DAP =10 cm. La vegetación del sector “arroyo Sereno” fitosociológicamente se agrupa en la alianzaPoulsenio armatae- Anacardion excelsi, entre cuyas especies características también figuran: Achrasexcelsi, Brownea ari...

  13. Evaluación de agua recreacional utilizando una bacteria compartida entre el hombre y los animales, Escherichia coli

    OpenAIRE

    Noseda, Ramón P.

    2007-01-01

    El Arroyo Azul posee las características típicas de un arroyo de llanura, su transcurrir urbano es utilizado por la población para su recreación. Durante el periodo 1993-2007 fue evaluada su calidad bacteriológica, utilizando la bacteria Escherichia coli fecal como indicador de contaminación, su origen entérico es compartido tanto por humanos como para animales. El objetivo fue determinar la calidad bacteriológica de dicha agua y relacionarla con distintas enfermedades de origen entérico que ...

  14. La Expresión Musical con los instrumentos escolares melódicos en el Tercer Ciclo de Educación Primaria. Propuesta de Intervención Educativa

    OpenAIRE

    Simonetti Aquistapace, Pablo Gastón

    2013-01-01

    El presente trabajo expone una propuesta de intervención educativa diseñada para el aula de música del tercer ciclo de Educación Primaria del C.E.I.P. Kantic@ Arroyo, centro educativo de gestión pública, ubicado en la localidad de Arroyo de la Encomienda, en la provincia de Valladolid. La intervención propuesta está dirigida a la formación musical del grupo destinatario de la misma, enfocada en el aspecto de la práctica de los instrumentos melódicos escolares, y se materiali...

  15. Bioestratigrafía del Pérmico de la Sierra de Los Llanos, La Rioja (Cuenca Paganzo), sobre la base de la megaflora y su correlación con áreas relacionadas

    OpenAIRE

    Coturel, Eliana Paula

    2014-01-01

    Este trabajo comprende el estudio paleobotánico de los depósitos de edad pérmica que afloran en la sierra de Los Llanos, Provincia de La Rioja, y su propósito principal es ubicar estratigráficamente la flora en el contexto local y regional. Se realizaron dos viajes de campo al conjunto de las sierras de Los Llanos y se reconocieron los sitios donde afloran las Formaciones Solca y Arroyo Totoral. Se hallaron cinco localidades fosilíferas para la Formación Arroyo Totoral en la pampa de Anzul...

  16. ESTRUCTURA DEL BOSQUE TEMPLADO DE GALERÍA EN LA SIERRA DE QUILA, JALISCO

    OpenAIRE

    Ana Luisa Santiago-Pérez; Alberto Ayón Escobedo; Verónica Carolina Rosas-Espinoza; Fabián Alejandro Rodríguez Zaragoza; Sandra Luz Toledo González

    2014-01-01

    El área protegida Sierra de Quila en Jalisco posee una extensa red de arroyos permanentes y temporales donde los bosques de galería mantienen importantes procesos ecológicos y de conectividad biológica. Este trabajo describe su estructura florística arbórea en siete arroyos ubicados en el intervalo altitudinal de 1 876 y 2 200 m. Se establecieron 29 sitios de muestreo de 500 m 2 cada uno (1.45 ha) en los que se midieron todos los individuos leñosos 7 cm de diámetro (DN). Se registraron ...

  17. Primer registro histórico de una avalancha de rocas enlos Andes argentinos: región de la laguna Baya en los Andes mendocinos

    Directory of Open Access Journals (Sweden)

    Estanislao N. Kozlowski

    2009-10-01

    Full Text Available La avalancha de rocas que generó a la laguna Baya seformó en los últimos 40-50 años como resultado de la inestabilidad de pendientesen las cabeceras del arroyo Bayo afluente del arroyo Pehuenche y Grande en elsur de la provincia de Mendoza. La reciente edad de su formación ha sidoconstatada a partir de la comparación de fotogramas de la década del sesentacon imágenes TM. De esta manera constituye una de las primeras determinacionesde un movimiento de este tipo constatado en tiempos históricos.

  18. Flora vascular de humedales permanentes y transitorios bonaerenses (Buenos Aires, Argentina)

    OpenAIRE

    Passarelli, Lilian Mónica; Rolleri, Cristina Hilda; Ciciarelli, María de las Mercedes; Dedomenici, Ana Clara; González, Graciela

    2014-01-01

    Este trabajo presenta un análisis de las fitocenosis y listas actualizadas de la flora vascular (con excepción de las Poaceae) de dos humedales permanentes, La Balandra y la Isla Santiago, y de varios humedales temporarios (arroyo Rodríguez, arroyo El Gato, y otros) de las zonas costeras del Río de La Plata (provincia de Buenos Aires, Argentina). El estudio se basó en el trabajo de campo y el seguimiento estacional de las comunidades silvestres entre los años 2005 y 2011, con un registro de 1...

  19. Parámetros protéicos del plasma seminal y su relación con la calidad del semen en toros de la raza nelore (bos taurus indicus

    Directory of Open Access Journals (Sweden)

    Ana Sánchez

    2006-10-01

    Full Text Available El propósito de este estudio fue investigar la presenciae incidencia de bandas proteicas específicas delplasma seminal en toros Nelore, completa y parcialmente aptos para la actividad reproductiva. Se utilizaron 68 ejemplares; 20 de variedad Padrón y 48 Mochos, con edad media de 4 años. En el perímetro escrotal (35,05±0,49 cm e 33,30±0,39cm, índice de masa corpórea (302,62±5,87 e 284,19±5,15Kg|m2 hubo diferencia (p<0,05 entre las variedades Padrón y Mocho, respectivamente. Con respecto al peso corpóreo (627,70±11,37 e 611,58±8,66Kg; la altura (1,44±0,01e 1,47±0,01m; el volumen del eyaculado (5,82±0,48 e 5,17±0,29 mL, la motilidad espermática progresiva (73,50±2,81% e75,62±0,97%, el vigor espermático (4,30±0,19 e4,27±0,11 y motilidad en masa (4,27±0,11 e3,33±0,23 no se presentó diferencia (p>0,05. En morfología espermática, tampoco hubo desigualdad entre las variedades Padrón y Mocho, respectivamente con 5,06 ± 8,20% e 5,32 ± 6,40% de defectos mayores; 9,91±6,74% e 8,36±6,06% para los defectos menores; e 14,76±13,20% e 13,82±12,61% para los defectos totales. La electroforesis del plasma seminal reveló bandas proteicas con pesos entre 5 a 105 KDa. En el 100% de toros aptos para la reproducción, la proteína con pesos de 13 Kda estuvo presente. De la misma forma ocurrió con las bandas de 20 KDa. El resto de las bandas proteicas mostraron presencia con diferentes porcentajes de incidencia en toros aptos o parcialmente aptos para la actividad reproductiva. Las dos variedades estudiadas hicieron evidente la adaptación reproductiva eficaz en condiciones de clima semejantes.

  20. The isotopic composition of ore lead of the Creede mining district and vicinity, San Juan Mountains, Colorado: Text of a talk presented at the San Juan Mountains symposium to honor Thomas A. Steven; Rocky Mountain Section meeting of the Geological Society of America, May 2, 1987, Boulder, Colorado

    Science.gov (United States)

    Foley, N.K.; Barton, P.B.; Bethke, P.M.; Doe, B.R.

    1988-01-01

    Galenas from the major Creede veins and their northern extensions are remarkably homogeneous in Pb-isotopic composition and are too radiogenic to have been derived from any magma comparable in composition to the principal volcanic rocks. This pattern was identified by Doe et al. in 1979 who proposed that the lead was derived from the Precambrian basement. The homogeneity of the ore leads, however, requires a uniform reservoir; an unlikely prospect for lead from the Precambrian basement. We report on 16 new analyses of geographically and paragenetically dispersed galenas from the Creede district and other areas as far as 11 km to the north. The lead values range from 18.972 to 19.060 for 206Pb/204Pb, from 15.591 to 15.671 for 207Pb/204Pb, and from 37.781 to 37.921 for 208Pb/204Pb. These ranges overlap those previously reported for the main ore zone.

  1. Gastromermis kolleonis n. sp. (Nematoda: Mermithidae), a Parasite of Midges (Chironomus sp. Chironomidae) from Argentina

    OpenAIRE

    de Doucet, Maria M. A.; Poinar, George O.

    1984-01-01

    Gastromermis kolleonis n. sp. (Nematoda: Mermithidae) is described from the Arroyo Saldan River in Córdoba, Argentina. This species parasitizes midges of the genus Chironomus (Chironomidae: Diptera). It is distinguished from other members of the genus by the presence of six longitudinal chords, vulval flaps, degree of ventral displacement of the mouth, and size and shape of the spicule and amphids.

  2. Archaeological Evidence Of Wild Mammals In The Czech Republic From The Neolithic To Modern Times

    Czech Academy of Sciences Publication Activity Database

    Kyselý, René

    Mexico City : Institutio Nacional de Antropologia e Historia, 2006 - (Polaco, O.; Arroyo-Cabrales, J.; Aguilar, F.; Guzmán, A.). s. 100 [International Council for Archaeozoology /10./. 23.08.2006-28.08.2006, Mexico City] Institutional research plan: CEZ:AV0Z80020508 Keywords : wild mammals * archaeozoology * quantification Subject RIV: AC - Archeology, Anthropology, Ethnology

  3. Cattle Loose Horns From The Eneolithic Site Of Hostivice-Litovice (Czech Republic): Breed Character Or Pathology?

    Czech Academy of Sciences Publication Activity Database

    Kyselý, René

    Mexico City : Institutio Nacional de Antropologia e Historia, 2006 - (Polaco, O.; Arroyo-Cabrales, J.; Aguilar, F.; Guzmán, A.). s. 100 [International Council for Archaeozoology /10./. 23.08.2006-28.08.2006, Mexico City] Institutional research plan: CEZ:AV0Z80020508 Keywords : loose horns * cattle * burial Subject RIV: AC - Archeology, Anthropology, Ethnology

  4. Effects of Soldiers' Deployment on Children's Academic Performance and Behavioral Health. Monograph

    Science.gov (United States)

    Richardson, Amy; Chandra, Anita; Martin, Laurie T.; Setodji, Claude Messan; Hallmark, Bryan W.; Campbell, Nancy F.; Hawkins, Stacy; Grady, Patrick

    2011-01-01

    Long and frequent deployments, with short dwell times in between, have placed stresses on Army children and families already challenged by frequent moves and parental absences. RAND Arroyo Center was asked by the Army to examine the effects of parental deployments on children's academic performance as well as their emotional and behavioral…

  5. Geophysical German mission

    International Nuclear Information System (INIS)

    This work is about a geological study carried out in the Arroyo Grande region with the proposal to identify a gravimetric anomaly. The sequence of Precambrian quartzite conglomerates determine the auriferous area existence due the surface erosion as well as the heavy minerals in particular the pyrites

  6. Survey of Radionuclide Distributions Resulting from the Church Rock, New Mexico, Uranium Mill Tailings Pond Dam Failure

    Energy Technology Data Exchange (ETDEWEB)

    Weimer, W. C.; Kinnison, R. R.; Reeves, J. H.

    1981-12-01

    An intensive site survey and on-site analysis program were conducted to evaluate the distribution of four radionucliGes in the general vicinity of Gallup, New Mexico, subsequent to the accidental breach of a uranium mill tailings pond dam and the release of a large quantity of tailings pond materials. The objective of this work was to determine the distribution and concentration levels of {sup 210}Pb, {sup 226}Ra, {sup 230}Th, and {sup 238}U in the arroyo that is immediately adjacent to the uranium tailings pond (pipeline arroyo) and in the Rio Puerco arroyo into which the pipeline arroyo drains. An intensive survey between the United Nuclear Corporation (UNC) Church Rock Mill site and the New Mexico-Arizona state border was performed. Sampling locations were established at approximately 500-ft intervals along the arroyo. During the weeks of September 24 through October 5, 1979, a series of samples was collected from alternate sampling locations along the arroyo. The purpose of this collection of samples and their subsequent analysis was to provide an immediate evaluation of the extent and the levels of radioactive contamination. The data obtained from this extensive survey were then compared to action levels which had been proposed by the Nuclear Regulatory Commission and were adapted by the New Mexico Environmental Improvement Division (NMEID) for {sup 230}Th and {sup 226}Ra concentrations that would require site cleanup. The Pacific Northwest Laboratory/Nuclear Regulatory Commission mobile laboratory van was on-site at the UNC Church Rock Mill from September 22, 1979, through December 13, 1979, and was manned by one or more PNL personnel for all but four weeks of this time period. Approximately 1200 samples associated with the Rio Puerco survey were analyzed 1n the laboratory. An additional 1200 samples related to the Rio Puerco cleanup operations which the United Nuclear Corporation was conducting were analyzed on-site in the mobile laboratory. The purpose of

  7. Composição corporal e exigências de macroelementos minerais (Ca, P, Mg, Na e K de bovinos não-castrados de quatro raças Zebuínas Body composition and macrominerals (Ca, P, Mg, Na and K requirements of bulls, from four Zebu breeds

    Directory of Open Access Journals (Sweden)

    Mário Fonseca Paulino

    1999-01-01

    Full Text Available A composição corporal e as exigências de macroelementos minerais (Ca, P, Mg, Na e K para ganho de peso de bovinos de quatro raças zebuínas (Gir, Guzerá, Mocho-Tabapuã e Nelore foram estimadas com 63 animais não-castrados, com idade média de 24 meses e 366 kg de PVinicial. Dezesseis animais das raças Gir, Guzerá e Mocho-Tabapuã e 15 da raça Nelore foram usados. Quinze animais, quatro das raças Gir, Guzerá e Mocho-Tabapuã e três da Nelore, foram abatidos ao início do estudo e os demais, distribuídos em três grupos, com três animais de cada raça e alimentados individualmente, ad libitum, com ração contendo 50% de concentrado na matéria seca, até atingirem peso de abate de 405, 450 e 500 kg, respectivamente. Equações de regressão do logaritmo do conteúdo corporal de macroelementos minerais, em função do logaritmo do corpo vazio (PCV, foram ajustadas para estimar os composição corporal dos constituintes para qualquer PCV, dentro do intervalo incluído na pesquisa (250 a 450kg. Pela derivação destas equações, a composição do ganho de PCV foi obtida. Animais das quatro raças não diferiram quanto à composição corporal de macroelementos minerais e às exigências líquidas para ganho de peso. Houve decréscimo na concentração dos cinco macroelementos no PCV e no peso ganho, com a elevação do PCV. As exigências líquidas estimadas para ganho de PCV, para os cinco macrominerais, foram inferiores aos valores fixos sugeridos pelo ARC (1980. Os requerimentos líquidos estimados de Ca e P para ganho de peso de um bovino não-castrado de 400 kg PV foram 16 e 24% inferiores, respectivamente, aos propostos pelo AFRC (1991.The body composition and macrominerals requirements for weight gain of four Zebu breeds (Gyr, Guzera, Mocho-Tabapuã and Nellore were estimated using 63 bulls averaging 24 months of age and 366 kg initial LW. Sixteen animals from Gir, Guzera e Mocho-Tabapuã breeds and 15 from Nellore breed

  8. The multitudinous creativity of the contemporary capitalisms

    Directory of Open Access Journals (Sweden)

    Ionuț Bârliba

    2015-12-01

    Full Text Available Creative Capitalism, Multitudinous Creativity, Radicalities and Alterities, Edited by Giuseppe Cocco and Barbara Szaniecki, Lexington Books, Lanham. Boulder. New York. London, 2015, 269p.

  9. RADIONUCLIDE DISPERSION RATES BY AEOLIAN, FLUVIAL, AND POROUS MEDIA TRANSPORT

    Energy Technology Data Exchange (ETDEWEB)

    J. Walton; P. Goodell; C. Brashears; D. French; A. Kelts

    2005-07-11

    Radionuclide transport was measured from high grade uranium ore boulders near the Nopal I Site, Chihuahua, Mexico. High grade uranium ore boulders were left behind after removal of a uranium ore stockpile at the Prior High Grade Stockpile (PHGS). During the 25 years when the boulder was present, radionuclides were released and transported by sheetflow during precipitation events, wind blown resuspension, and infiltration into the unsaturated zone. In this study, one of the boulders was removed, followed by grid sampling of the surrounding area. Measured gamma radiation levels in three dimensions were used to derive separate dispersion rates by the three transport mechanisms.

  10. Implications of volcanic erratics in Quaternary deposits of North Greenland

    DEFF Research Database (Denmark)

    Funder, Svend Visby; Larsen, Ole

    1982-01-01

    Erratic boulders, petrographically similar to the volcanics exposed around Kap Washington, are found on islands and along the coast much further to the east. Isotopic measurements on two such boulders show that these volcanic rocks are of the same age as the Kap Washington volcanics. The regional...

  11. 33 CFR 151.66 - Operating requirements: Discharge of garbage in the Great Lakes and other navigable waters.

    Science.gov (United States)

    2010-07-01

    ... Carriers Association (LCA) track lines; and (2) Along 056.25° LCA track line between due east of Poverty... Lakeshores; except that discharges are allowed: (1) Along 013.5° LCA track line between 45° N and Boulder Reef, and along 022.5° LCA track running 23.25 miles between Boulder Reef and the charted position...

  12. Creating a Culture of General Education Assessment

    Science.gov (United States)

    Wong, Erwin J.; Campos, Francisca C.; Buxton, Ralph W.

    2008-01-01

    Many people know the myth of Sisyphus, the ancient king who committed an offense against the gods and was condemned for an eternity to roll a boulder unsuccessfully to the top of a steep hill. Each time he reached the summit, the boulder, of its own weight, would roll back to the bottom, whereupon Sisyphus would have to begin laboriously rolling…

  13. Using MM5 to Predict Hazardous Situations for Power Supply

    Czech Academy of Sciences Publication Activity Database

    Eben, Kryštof; Juruš, Pavel; Keder, J.; Vyorálková, Inka; Pelikán, Emil

    Boulder : NCAR, 2003, s. 52-55. [PSU/NCAR Mesoscale Model User's Workshop /13./. Boulder (US), 10.06.2003-11.06.2003] R&D Projects: GA ČR GA205/02/1488 Institutional research plan: AV0Z1030915 Keywords : numerical weather prediction * decission support systems * risk assesment

  14. Intercity Information

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    Shanghai Xbreaker Sports FactoryShanghai Tongji University Xbreaker Sports Factory is the ultimate indoor sports gymnasium.Established in September 2001, the gymnasium has a bouldering area, a park and lounge. It is the perfect game venue or professional training center for bouldering, skateboarding, rollerskating, and trick cycling.Courses are taught by professional

  15. Wind input data for urban dispersion modeling - activities of working group 1

    Czech Academy of Sciences Publication Activity Database

    Kastner-Kline, P.; Rotach, M.; Batchvarova, E.; Berkowicz, R.; Jaňour, Zbyněk

    Boulder : XX, 2000, s. 55-67. [Third Symposium on the Urban Environment . Boulder (US), 13.08.2000-16.08.2000] R&D Projects: GA MŠk OC 715.10 Keywords : urban * air pollution * wind Subject RIV: BK - Fluid Dynamics

  16. 75 FR 11942 - In the Matter of U.S. Department of Commerce, National Institute of Standards and Technology...

    Science.gov (United States)

    2010-03-12

    ... under 10 CFR 2.315(c), must be filed in accordance with the NRC E-Filing rule (72 FR 49139, August 28...) Completing extensive, successful decontamination of the NIST- Boulder facility; (2) Designating a new... deletion of all specifically licensed radionuclides currently listed on the NIST-Boulder NRC license...

  17. Pré-filtração em pedregulho e filtração lenta com areia, manta não tecida e carvão ativado para polimento de efluentes domésticos tratados em leitos cultivados Pré-filtration in boulder and slow sand filtration with non-woven synthetic layers and granulated vegetal coal to improve quality in wastewater treated by constructed wetlands

    OpenAIRE

    José E. S. Paterniani; Marcelo J. M. da Silva; Tulio A. P. Ribeiro; Melina Barbosa

    2011-01-01

    O presente trabalho teve como objetivo comparar sistemas de filtragem, composto de pré-filtro de pedregulho seguido de filtro lento com o meio filtrante areia e no topo manta sintética não tecida e pré-filtro de pedregulho seguido de filtro lento com meio filtrante areia e carvão ativado granular e no topo manta sintética não tecida, para polimento de efluentes domésticos tratados em leitos cultivados, visando à aplicação na fertirrigação. Na comparação dos sistemas de filtragem, avaliou-se a...

  18. Deslizamientos al norte de la población deTricao Malal, noroeste del Neuquén

    Directory of Open Access Journals (Sweden)

    Emilio F. GonzálezDíaz

    2009-11-01

    Full Text Available Se describen deslizamientos hasta ahora no reconocidosy de dispar tipología, en una zona adyacente a la margen izquierda del valledel río Curri Leuvú, ubicada al norte de la población de Tricao Malal. Estánsituados entre el cerro Palao, la laguna homónima y el sector de los llamadosRiscos Negros. Los mayores, deslizamientos correspondientes a Malal Cura yArroyo Mogolillo, corresponden al tipo rotacional múltiple, retrógado yprogresivo y están localizados en un ambiente de las sedimentitas mesozoicas,cubiertas por coladas basálticas cenozoicas. Los deslizamientos del tipo flujo(debris flow y earth flow, son proclives a ocurrir en áreas cubiertas por lasrocas volcánicas de la Formación Charilehue (Mioceno medio. Se proyectan másal norte de los límites del presente estudio, alcanzando las latitudes delvalle de los arroyos Grande y del Medio y también al sureste del cerro Domuyo(valle del arroyo Colimamil. El impacto de estos fenómenos en la red fluviallocal alcanzó importancia, llegando en el pasado en ocasiones a obstruirlagenerando cuerpos de agua permanentes, como es el caso del arroyo La Turbia yla simultánea generación de la actual laguna homónima. Se plantea laalternativa de que la ocurrencia de los deslizamientos está relacionada conexcesivos o prolongados períodos de precipitaciones, en tiempos postglaciarios.Se señala la más limitada presencia de glaciares de rocas en el cerro Palao.

  19. Uso de las aguas residuales para el riego de cultivos agrícolas, en la agricultura urbana

    OpenAIRE

    Marcial A. Méndez F.; Martha P. Ricardo C.; Jeny Pérez P.; Geisy Hernández C.; Osvaldo Campos

    2006-01-01

    El uso de las aguas residuales se presenta como una de las fuentes alternativas para el riego en la agricultura urbana. Esto entraña un conjunto de interrogantes en cuanto a su manejo y las posibles afectaciones que ellas puedan ocasionar a los frutos cosechados, al suelo y al medio ambiente. Las informaciones que se presentan, son solo los primeros resultados de los estudios introductorios hasta ahora realizados. Las aguas residuales del afluente Luyanó en el municipio Arroyo Naranj...

  20. Negotiating peace with the Moro Islamic Liberation Front in the Southern Philippines

    OpenAIRE

    Caculitan, Ariel R.

    2005-01-01

    The peace negotiation between the Government Republic of the Philippines and the secessionist Moro Islamic Liberation Front which started in 1997 during the time of former President Fidel V. Ramos went through turbulent times in the year 2000 when the succeeding President, Joseph Estrada, failed to continue the momentum of the peace initiative and instead declared an â all out warâ in dealing with the rebel group. When Gloria Macapagal Arroyo became president in 2001, she turned the â all...

  1. Testing the Effects of an Introduced Palm on a Riparian Invertebrate Community in Southern California

    OpenAIRE

    Theresa Sinicrope Talley; Kim-Chi Nguyen; Anthony Nguyen

    2012-01-01

    Despite the iconic association of palms with semi-arid regions, most are introduced and can invade natural areas. Along the San Diego River (San Diego, California, USA), the introduced Canary Island date palm (Phoenix canariensis) forms dense patches among native riparian shrubs like arroyo willow (Salix lasiolepis). The structural differences between the palm and native shrubs are visually obvious, but little is known about palm's effects on the ecosystem. We tested for the effects of the pa...

  2. Unravelling past flash flood activity in a forested mountain catchment of the Spanish Central System

    OpenAIRE

    Ballesteros Cánovas, Juan Antonio; Rodríguez Morata, Clara; Garofano Gomez, Virginia; Rubiales Jimenez, Juan Manuel; Sánchez Salguero, Raul; Stoffel, Markus

    2014-01-01

    Flash floods represent one of the most common natural hazards in mountain catchments, and are frequent in Mediterranean environments. As a result of the widespread lack of reliable data on past events, the understanding of their spatio-temporal occurrence and their climatic triggers remains rather limited. Here, we present a dendrogeomorphic reconstruction of past flash flood activity in the Arroyo de los Puentes stream (Sierra de Guadarrama, Spanish Central System). We analyze a ...

  3. In vitro study of RRS HA injectable mesotherapy/biorevitalization product on human skin fibroblasts and its clinical utilization

    OpenAIRE

    Deglesne PA; Arroyo R; Ranneva E; Deprez P

    2016-01-01

    Pierre-Antoine Deglesne,* Rodrigo Arroyo,* Evgeniya Ranneva, Philippe Deprez Research and Development, SKIN TECH PHARMA GROUP, Castelló d'Empúries, Spain  *These authors contributed equally to this work Abstract: Mesotherapy/biorevitalization with hyaluronic acid (HA) is a treatment approach currently used for skin rejuvenation. Various products with a wide range of polycomponent formulations are available on the market. Most of these formulatio...

  4. Reconciling Holocene Alluvial Records in Buckskin Wash, Southern Utah

    OpenAIRE

    Harvey, Jonathan E.

    2009-01-01

    Most approaches to interpreting alluvial records in drylands fall into one of two categories: (1) The "arroyo problem," wherein workers study cycles of streambed aggradation and degradation in broad, unconstricted alluvial valleys; and (2) paleoflood hydrology, where alluvial sequences in constricted bedrock canyons are interpreted as paleoflood deposits from streams with stable channel grade and geometry. Both approaches can be valid in their end-member settings, but there is confusion abo...

  5. CORTIZO ÁLVAREZ, T. (1998: Los gráficos en geografía. Gijón: Tria-ka, 147pp.

    Directory of Open Access Journals (Sweden)

    Francisca Rubio Sotés

    1999-12-01

    Full Text Available Una de las destrezas más significativas desarrolladas por la Geografía es la "graficidad" (Arroyo, 1995 entendida como la aptitud para transcribir los datos estadísticos de carácter espacial al lenguaje gráfico, es decir, a diagramas y a mapas. Representando un lenguaje visual para la investigación y la comunicación geográficas.

  6. Presence of toxic microbial metabolites in table olives

    OpenAIRE

    Medina-Pradas, Eduardo; Arroyo-López, Francisco Noé

    2015-01-01

    © 2015 Medina-Pradas and Arroyo-López. Table olives have an enormous importance in the diet and culture of many Mediterranean countries. Albeit there are different ways to produce this fermented vegetable, brining/salting, fermentation, and acidification are common practices for all of them. Preservation methods such as pasteurization or sterilization are frequently used to guarantee the stability and safety of fermented olives. However, final products are not always subjected to a heat treat...

  7. Coupling Numerical and Physical Modeling for Analysis of Flow in a Diversion Structure with Coanda-effect Screens

    OpenAIRE

    Julie Coonrod; Seyed Mahmood Hosseini

    2011-01-01

    There is an increasing need to screen water in surface water collection systems to remove floating debris and small aquatic organisms to protect receiving water bodies. Recently, the Albuquerque Metropolitan Arroyo Flood Control Authority (AMAFCA, New Mexico, USA) has actively introduced structural debris removal from storm-water facilities as a best management practice. In the South Diversion Channel Project, AMAFCA’s objective is to divert the flow at the upstream end of the existing concre...

  8. Determinación del área inmediata afectada por el desagote de la laguna Navarrete, Provincia de Neuquén (36°30'S-71°O

    Directory of Open Access Journals (Sweden)

    I.M. Penna

    2007-09-01

    Full Text Available Teniendo en cuenta la alta densidad de avalanchas de roca distribuidas en el norte neuquino y su asociación con cuencas lacustres entre los 36°-38°S y 70°-71°O, son escasos los registros de desagotes catastróficos por colapso de diques naturales, pese a que éste sería el estadio final más probable en su evolución. El presente trabajo está orientado a la delimitación del área inmediatamente afectada por la ruptura del dique natural Navarrete (175 millones de metros cúbicos generado por la obstrucción, por parte de una avalancha de rocas, del tramo medio del arroyo Colorado (afluente del arroyo Pichi-Neuquén en tiempos postglaciarios no determinados. La dispersión del aluvión de ruptura desde su área fuente, se determina primeramente basándose en evidencias geomorfológicas y luego a partir del análisis sedimentario de la matriz de los depósitos de aluvión y su comparación con los del arroyo Colorado. Debido al área considerada, próxima a la boca de rotura del dique natural, las variaciones son poco significativas, si bien pueden reconocerse diferencias en la distribución de frecuencias en la matriz de los depósitos de aluvión y del arroyo en el punto de muestreo más distante al dique.

  9. Interpretation of stable isotope, denitrification, and groundwater age data for samples collected from Sandia National Laboratories /New Mexico (SNL/NM) Burn Site Groundwater Area of Concern

    Energy Technology Data Exchange (ETDEWEB)

    Madrid, V. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Singleton, M. J. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Visser, A. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Esser, B. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2016-06-02

    This report combines and summarizes results for two groundwater-sampling events (October 2012 and October/November 2015) from the Sandia National Laboratories/New Mexico (SNL/NM) Burn Site Groundwater (BSG) Area of Concern (AOC) located in the Lurance Canyon Arroyo southeast of Albuquerque, NM in the Manzanita Mountains. The first phase of groundwater sampling occurred in October 2012 including samples from 19 wells at three separate sites that were analyzed by the Environmental Radiochemistry Laboratory at Lawrence Livermore National Laboratory (LLNL, Madrid et al., 2013) as part of a nitrate Monitored Natural Attenuation (MNA) evaluation. The three sites (BSG, Technical Area-V, and Tijeras Arroyo) are shown on the regional hydrogeologic map (Figure 1) and described in the Sandia Annual Groundwater Monitoring Report (Jackson et al., 2011). The first phase of groundwater sampling included six monitoring wells at the Burn Site, eight monitoring wells at Technical Area-V, and five monitoring wells at Tijeras Arroyo. Each groundwater sample was analyzed using the two specialized analytical methods, age-dating and denitrification suites (Table 1). In September 2015, a second phase of groundwater sampling took place at the Burn Site including 10 wells sampled and analyzed by the same two analytical suites. Five of the six wells sampled in 2012 were resampled in 2015

  10. Antimony in the Contaminated Site of El Triunfo, Baja California Sur, Mexico

    Directory of Open Access Journals (Sweden)

    Marmolejo-Rodríguez A. J.

    2013-04-01

    Full Text Available Antimony has properties similar to arsenic with some of its compounds toxic to humans. Therefore it is necessary to control the wastes accumulated by anthropogenic activities, such as mining, where it is in tailings to be released to the environment. According to the Environment Protection Agency, the maximum value in sediments is 11.2 mg Sb kg–1 and the Earth’s crust average is 0.2 mg Sb kg–1. In this semiarid area, the drainage basin El Carrizal is impacted with wastes of an abandoned gold mine at the Mining District El Triunfo (MD – ET which have tailings with 17,600 mg kg–1 of antimony. In the main dry river (arroyo, the Sb content is between 0.6 and 122 mg kg–1. This element is transported from the source throughout the fluvial basin to discharge into the Pacific Ocean. In the arroyo mouth we collected one sedimentary core and the sediment from dunes (28.6 – 45.7 and 6.43 – 7.74 mg Sb kg–1. This research concluded the antimony is enriched in this semiarid system, with Normalized Enrichment Factors severely enriched mainly in arroyo sediments close to the MD-ET

  11. Structural reinterpretation of the Ajo mining district, Pima County, Arizona, based on paleomagnetic and geochronologic studies.

    Science.gov (United States)

    Hagstrum, J.T.; Cox, D.P.; Miller, R.J.

    1987-01-01

    The Ajo mining district of southern Arizona is divided into two main structural blocks by the Gibson Arroyo fault. The eastern Camelback Mountain block contains the Late Cretaceous-early Tertiary porphyry copper deposit which has been previously thought to be associated with the displaced apex of a large intrusion exposed by deeper erosion in the western Cardigan Peak block. However, unpublished U-Pb data support a mid-Tertiary age for the western intrusion. The following sequence of mid-Tertiary events in the district are indicated: 1) emplacement of the western intrusion, 2) movement along the Gibson Arroyo fault, 3) unroofing and perhaps tilting of the pluton approx 70o to the south along with the Camelback Mountain block, 4) syntectonic depositions of the Locomotive Fanglomerate and the Ajo Volcanics, 5) continued uplift and tilting to the south totaling 40o to 60o, 6) intrusion of the youngest dikes with attendant alteration and remagnetization of the host rocks, and 7) minor (?) oblique movement along the Gibson Arroyo fault.-from Authors

  12. Paleoambientes litorales durante el inicio de la trasgresión marina holocena en bahía Lapataia, canal Beagle, parque nacional Tierra del Fuego

    Directory of Open Access Journals (Sweden)

    Jorge Rabassa

    2009-12-01

    Full Text Available Los sitios Aserradero Lapataia 1 y 2 presentan depósitos limo-arcillosos portadores de valvas de moluscos: Mulinia edulis, Mytilus chilensis, Aulacomya atra y Yoldia sp. Además predominan los quistes de dinoflagelados, revestimientos de foraminíferos bentónicos y huevos de copépodos. Valvas de Mulinia edulis fueron datadas radiocarbónicamente en 8.094 ± 43 (AA74047 y 8.167 ± 43 (AA74048 a A.P. En Arroyo Baliza depósitos limo-arcillosos son portadores de Venus antiqua, Aulacomya atra, Mytilus chilensis, entre otros. La microflora está dominada por dinoquistes protoperidinioideos, acritarcos y restos de copépodos. Se sugiere ambientes marino-marginales, con baja a moderada salinidad, y altas concentraciones de nutrientes en las aguas superficiales. La datación radiocarbónica sobre Venus antiqua en Arroyo Baliza indica 2.844 ± 34 a A.P. (AA74046. Aserradero Lapataia confirma las edades más antiguas conocidas para la fase estuárica de la transgresión holocena en el canal Beagle. Arroyo Baliza aporta nueva evidencia de la fase regresiva en este canal durante el Holoceno tardío.

  13. A coagulation-fragmentation model for the turbulent growth and destruction of preplanetesimals

    CERN Document Server

    Johansen, Anders; Dullemond, Cornelis; Klahr, Hubert; Henning, Thomas

    2008-01-01

    To treat the problem of growing protoplanetary disc solids across the meter barrier, we consider a very simplied two-component coagulation-fragmentation model that consists of macroscopic boulders and smaller dust grains, the latter being the result of catastrophic collisions between the boulders. Boulders in turn increase their radii by sweeping up the dust fragments. An analytical solution to the dynamical equations predicts that growth by coagulation-fragmentation can be efficient and allow agglomeration of 10-meter-sized objects within the time-scale of the radial drift. These results are supported by computer simulations of the motion of boulders and fragments in 3-D time-dependent magnetorotational turbulence. Allowing however the fragments to diffuse freely out of the sedimentary layer of boulders reduces the density of both boulders and fragments in the mid-plane, and thus also the growth of the boulder radius, drastically. The reason is that the turbulent diffusion time-scale is so much shorter than ...

  14. Crescimento relativo dos componentes do corpo de zebuínos de diferentes raças Relative growth of body components from different zebu breeds

    Directory of Open Access Journals (Sweden)

    André Mendes Jorge

    2000-05-01

    Full Text Available Foram utilizados 64 tourinhos Gir, Guzerá, Mocho Tabapuã e Nelore, com 24 meses e pesos vivos médios iniciais de 376,4; 357,6, 362,0 e 368,6 kg respectivamente. Os animais de cada raça foram divididos em cinco categorias. Uma categoria foi abatida imediatamente (AB, três receberam, em baias individuais, ração contendo 50% de concentrado na matéria seca ad libitum (I, II e III e uma recebeu a mesma ração, em quantidade restrita (AR. Os animais I, II e III foram abatidos ao atingirem pesos vivos individuais de 405, 450 e 495 kg, respectivamente. No abate determinou-se o peso corporal vazio (PCVZ, e pesaram-se a cabeça, os pés, o couro, os órgãos internos e as vísceras. Adotou-se a equação de regressão do logaritmo do peso de cada componente do corpo em função do logaritmo do PCVZ. Todos os componentes estudados, excetuando-se o fígado e o baço, revelaram um menor ímpeto de crescimento em relação ao do PCVZ.Sixty three steers from zebu breeds Gyr, Guzerat, Mocho Tabapua and Nellore, weighing, respectively, 376.4, 357.6, 362.0 and 368.6 kg initial live weight and twenty-four months old, were used. The animals from each breed were divided into five groups. One group was ramdomly assigned to immediate slaughter (AB, three groups were full-fed a ration containing 50% concentrate, dry matter basis until reaching the slaughter weights of 405, 450 and 495 kg, respectively (group I, II and III. The fifth group was fed a restricted amount of the same ration (AR. At slaughter the empty body weight (EBW was determined and the weight of internal organs and viscera were recorded. Regression equations of log weight of body component as a function of log EBW were fitted. All body components studied, with exception of liver and spleen, developed slowlier than EBW.

  15. Composição corporal de bovinos de quatro raças zebuínas, abatidos em diferentes estádios de maturidade Body composition of four zebu breed beef cattle slaughtered at different stages of maturity

    Directory of Open Access Journals (Sweden)

    André Mendes Jorge

    1999-04-01

    Full Text Available Este trabalho foi realizado com o objetivo de avaliar a composição química corporal de 63 animais não-castrados das raças Gir, Guzerá, Mocho de Tabapuã e Nelore, em confinamento, com pesos vivos médios iniciais de 376,4; 357,6, 362,0; e 368,6 kg, respectivamente. Em cada raça, os animais foram divididos em cinco categorias: abate inicial, alimentação ad libitum com ração contendo 50% de concentrado até atingirem pesos individuais de abate de 405, 450 e 500 kg, respectivamente, e, finalmente, categoria alimentação restrita recebendo a mesma ração, suprindo níveis de proteína e energia 15% acima da mantença. Não houve diferenças entre as raças quanto aos conteúdos corporais de proteína, gordura, energia e macroelementos minerais (Ca, P, Mg, K e Na. Os animais abatidos com pesos mais elevados apresentam menores porcentagens de proteína e macroelementos minerais (Ca, P, Mg, K e Na no corpo, ocorrendo o inverso para a gordura corporal.This work was conducted to evaluate the chemical body composition of sixty three young bulls, from the Gyr, Guzera, Mocho Tabapuã, Nellore breeds, in feedlot, averaging, respectively, 376.4, 357.6, 362.0, and 368.6 kg of initial live weight. The animals from each breed were divided into five categories: initial slaughter, full fed diet containing 50% concentrate until the individual slaughter weights of 405, 450 and 500 kg, respectively, and finally the category restricted feeding fed the same diet supplying levels of protein and energy 15% above maintenance. There were no differences among breed regarding to body content of protein, fat, energy and macrominerals (Ca, P, Mg, K and Na. The animals slaughtered at higher weights showed lower percentage of body protein and macrominerals (Ca, P, Mg, K and Na, and occurring the inverse to the body fat.

  16. Estádios de desenvolvimento embrionário de vacas zebuínas superovuladas

    Directory of Open Access Journals (Sweden)

    Fonseca J.F.

    2001-01-01

    Full Text Available O objetivo deste estudo foi relatar o estádio de desenvolvimento de embriões coletados a partir de processos superovulatórios em zebuínos. Foram utilizadas 26 vacas, 16 da raça Nelore Padrão, três da Nelore Mocho, quatro da Gir, duas da Brahman e uma da raça Guzerá. Para o processo de superovulação utilizaram-se 350 UI de FSH em oito doses decrescentes a cada 12 horas, a partir do 10ºdia do ciclo estral (estro = dia 0. Ao sétimo dia após o estro os embriões foram coletados pelo método não cirúrgico e avaliados ao microscópio estereoscópio quanto à qualidade e estádio de desenvolvimento embrionário. Foram coletados 135 embriões viáveis, sendo 68,2% (92/135 Nelore Padrão, 12,6% (17/135 Nelore Mocho, 11,1% (15/135 Gir, 5,2% (7/135 Brahman e 3,0% (4/135 Guzerá. Os embriões foram classificados segundo a qualidade em grau I, 51,1% (69/135, grau II, 43,7% (59/135, grau III, 4,4% (6/135, e grau IV, 0,7% (1/135, e segundo o estádio de desenvolvimento em mórula, 3,7% (5/135, blastocisto inicial, 16,3% (22/135, blastocisto, 37,0% (50/135, blastocisto expandido, 42,2% (57/135, e blastocisto eclodido, 0,7% (1/135. Observou-se predominância de estádios embrionários avançados (blastocisto, blastocisto expandido e blastocisto eclodido que representaram 80% do total de embriões.

  17. Utilização de método indireto para predição da composição química corporal de zebuínos Use of indirect method to predict chemical body composition in zebu cattle

    Directory of Open Access Journals (Sweden)

    André Mendes Jorge

    2000-12-01

    Full Text Available O objetivo deste trabalho foi desenvolver equações de predição da composição química corporal de zebuínos, por intermédio da análise química de amostra de seção representativa da carcaça. Utilizaram-se sessenta e três animais não-castrados das raças Gir, Guzerá, Mocho de Tabapuã e Nelore. Os conteúdos corporais de proteína, gordura e macroelementos minerais (cálcio, fósforo, potássio, magnésio e sódio foram determinados analisando-se amostras de seção da carcaça incluindo a 9ª, 10ª e 11ª costelas (seção HH e dos demais tecidos corporais. Os teores de proteína, gordura, energia e macroelementos minerais da secção HH, com exceção para o magnésio, mostraram-se altamente correlacionados com a composição química corporal. As equações de predição baseadas na composição química da secção HH mostraram-se confiáveis para estudos comparativos da composição corporal de zebuínos.The objective of this study was to develop equations to predict chemical body composition from zebu cattle, based on chemical composition from carcass representative section. Sixty-three young bulls from Gyr, Guzera, Nellore and Mocho de Tabapuã breeds were used. Body content of protein, fat and minerals were determined on samples from the carcass section that included the 9th, 10th and 11th rib joint (HH joint, and from the remaining body tissues. Protein, fat, energy and ash contents from the HH joint, except for magnesium, were closely related to protein, fat, energy and ash contents in the body. Prediction equations based on chemical composition from HH joint showed to be reliable for comparative studies of body composition of zebu cattle.

  18. Lunar surface engineering properties experiment definition. Volume 2: Mechanics of rolling sphere-soil slope interaction

    Science.gov (United States)

    Hovland, H. J.; Mitchell, J. K.

    1971-01-01

    The soil deformation mode under the action of a rolling sphere (boulder) was determined, and a theory based on actual soil failure mechanism was developed which provides a remote reconnaissance technique for study of soil conditions using boulder track observations. The failure mechanism was investigated by using models and by testing an instrumented spherical wheel. The wheel was specifically designed to measure contact pressure, but it also provided information on the failure mechanism. Further tests included rolling some 200 spheres down sand slopes. Films were taken of the rolling spheres, and the tracks were measured. Implications of the results and reevaluation of the lunar boulder tracks are discussed.

  19. Solubilities of solid polycyclic aromatic hydrocarbons and polycyclic aromatic heterocycles in pressurized hot water

    Czech Academy of Sciences Publication Activity Database

    Karásek, Pavel; Planeta, Josef; Roth, Michal

    Boulder, CO: National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, USA, 2006 - (Friend, D.; Frenkel, M.; Muzny, C.; Hardin, G.). s. 641-642 [International Conference on Chemical Thermodynamics /19./. THERMO International 2006. 30.07.2006-04.08.2006, Boulder, CO] R&D Projects: GA AV ČR IAA4031301; GA AV ČR KJB400310504; GA ČR GA203/05/2106 Keywords : aqueous solubility * pressurized hot water * polycyclic aromatic compounds Subject RIV: CF - Physical ; Theoretical Chemistry

  20. On identifying parent plutonic rocks from lunar breccia and soil fragments

    Science.gov (United States)

    Haskin, Larry A.; Lindstrom, David J.

    1988-01-01

    Breccia fragments expected from a well-studied boulder of Stillwater anorthosite have been modeled to test the ability to identify parental rock types from examination of breccia and soil fragments. Depending on their size, the boulder fragments give distributions that suggest mixtures of rock types, including monominerallic anorthosite with subordinant amounts of more gabbroic anorthosite, anorthosite, and gabbro for small fragments. The distribution of FeO in samples of lunar ferroan anorthosite (FAN) indicates that FAN has a heterogeneous distribution of mafic minerals like the boulder.

  1. Paleoambientes litorales durante el inicio de la trasgresión marina holocena en bahía Lapataia, canal Beagle, parque nacional Tierra del Fuego Littoral paleoenvironments during the beginning of the Holocene marine transgression in Lapataia Bay, Beagle Channel, National Park of Tierra del Fuego

    Directory of Open Access Journals (Sweden)

    Jorge Rabassa

    2009-12-01

    Full Text Available Los sitios Aserradero Lapataia 1 y 2 presentan depósitos limo-arcillosos portadores de valvas de moluscos: Mulinia edulis, Mytilus chilensis, Aulacomya atra y Yoldia sp. Además predominan los quistes de dinoflagelados, revestimientos de foraminíferos bentónicos y huevos de copépodos. Valvas de Mulinia edulis fueron datadas radiocarbónicamente en 8.094 ± 43 (AA74047 y 8.167 ± 43 (AA74048 a A.P. En Arroyo Baliza depósitos limo-arcillosos son portadores de Venus antiqua, Aulacomya atra, Mytilus chilensis, entre otros. La microflora está dominada por dinoquistes protoperidinioideos, acritarcos y restos de copépodos. Se sugiere ambientes marino-marginales, con baja a moderada salinidad, y altas concentraciones de nutrientes en las aguas superficiales. La datación radiocarbónica sobre Venus antiqua en Arroyo Baliza indica 2.844 ± 34 a A.P. (AA74046. Aserradero Lapataia confirma las edades más antiguas conocidas para la fase estuárica de la transgresión holocena en el canal Beagle. Arroyo Baliza aporta nueva evidencia de la fase regresiva en este canal durante el Holoceno tardío.The Aserradero Lapataia 1 and 2 sites present clayey silty sediments including mollusk shell; Mulinia edulis, Mytilus chilensis, Aulacomya atra and Yoldia sp. Besides, dinoflagelate cysts, covers of benthonic foraminifera and copepod eggs are dominant. The microflora is represented by sporomorphs and fresh to salty water microplancton. Radiocarbon dates on Mulinia edulis shells yielded ages of 8094 ± 43 (AA74047 and 8167 ± 43 (AA74048 yr B.P. At Arroyo Baliza, clayey silts were found including Venus antiqua, Aulacomya atra, Mytilus chilensis, among others, accompanied by acritarchs and remnants of copepods. This association suggests marginal marine environments, with low to moderate salinity, and high nutrient concentration in the surface waters. Radiocarbon dating on Venus antiqua shells yielded 2844 ± 34 yr B.P. (AA74046. Marine deposits of the Aserradero

  2. 75 FR 10526 - In the Matter of Mr. Lawrence E. Grimm; Order Prohibiting Involvement in NRC-Licensed Activities

    Science.gov (United States)

    2010-03-08

    ... under 10 CFR 2.315(c), must be filed in accordance with the NRC E-Filing rule (72 FR 49139, August 28... Quantum Physics Laboratories at the NIST-Boulder facility were issued a key to the project...

  3. Aerosol backscattering profiles of CO2 wavelengths: the NOAA data base

    International Nuclear Information System (INIS)

    NOAA's data base for aerosol backscattering at lambda = 10.6 μm since May 1981, Boulder, Colorado, is presented together with seasonally averaged profiles and statistical analyses. Studies of the El Chichon event are included

  4. Depth to Coal Mining in the Colorado Front Range (frimndpthu)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This file is a digital polygon representation of the depth to (overburden above) abandoned underground coal mines in the Boulder-Weld coal field, Denver Basin,...

  5. Unusual features caused by lightning impact in West Greenland

    DEFF Research Database (Denmark)

    Appel, P.; Abrahamsen, N.; Rasmussen, T.

    2006-01-01

    that a strong electric current indeed traversed the boulder. A few years later a second lightning impacted on a mountaintop close to the first impact. The second lightning left a trail on the rock surface covered by a thin layer of glass. The glass displays spectacular colours ranging from metallic blue, to red......   Two lightning impacts are described from an area near the Inland Ice in West Greenland. The first lightning blasted an outcrop of metacherts. It subsequently split into two branches, which traversed rock outcrops and boulders, leaving behind two white almost straight lines, 30 m and 14 m long...... respectively, where all lichens and plants were burned away. On the white lines the upper few millimetres of the traversed boulders were melted to a glass which subsequently peeled off by thermal expansion to leave a rough surface. Magnetic investigation of an amphibolite boulder found on the white line showed...

  6. 75 FR 8947 - M. Catherine Higgins; Analysis of the Agreement Containing Consent Order to Aid Public Comment

    Science.gov (United States)

    2010-02-26

    ... is punitive. The order provisions are similar to those in other orders naming individuals. For a... punitive: Ms. Higgins cannot possibly do her job to the fullest extent for Boulder Valley if she is...

  7. Late Devonian glaciation in Gondwana: Global lacunae, emergent carbonate banks, and Lowstand eutrophication

    Czech Academy of Sciences Publication Activity Database

    Isaacson, P. E.; Grader, G.; Hladil, Jindřich; Kalvoda, J.; Shen, J.

    Boulder : Geological Society of America , 1999. s. A-424. [ Geological Society of America Annual 1999 Meeting,Session Stratigraphy and Basin Analysis,Sequence /184./. 25.10.1999-28.10.1999, Denver] Subject RIV: DA - Hydrology ; Limnology

  8. Developing and Implementing a Marketing Plan.

    Science.gov (United States)

    McCalmon, Byron G.

    1987-01-01

    A program focusing on recruitment of new freshmen at the University of Colorado at Boulder illustrates some major planning considerations in the development, implementation, and evaluation of a marketing plan. (MSE)

  9. ROE Absolute Sea Level Changes

    Data.gov (United States)

    U.S. Environmental Protection Agency — This raster dataset represents changes in absolute sea level along U.S. coasts from 1993 to 2014. Data were provided by the University of Colorado at Boulder (2015)...

  10. Rocky Flats National Wildlife Refuge Land Protection Plan for Section 16 Acquisition

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Rocky Flats National Wildlife Refuge (NWR) is located 16 miles northwest of Denver, Colorado on the borders of Boulder, Broomfield, and Jefferson Counties and...

  11. Electro-Optic Imaging Fourier Transform Spectral Polarimeter Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Boulder Nonlinear Systems, Inc. (BNS) proposes to develop an Electro-Optic Imaging Fourier Transform Spectral Polarimeter (E-O IFTSP). The polarimetric system is...

  12. Geomagnetic Observatory Annual Means Data

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) / World Data Center, Boulder maintains an active database of...

  13. A Conversation on "Cage-Busting Leadership": Manager Editor Angela Pascopella Speaks with Author Frederick M. Hess

    Science.gov (United States)

    Pascopella, Angela

    2013-01-01

    Recalling the myth of Sisyphus repeatedly pushing the same boulder up a mountain in his new book, author and educator Frederick M. Hess explains how the K12 education leadership is faltering, and how it can rise above.

  14. Wind Technologies & Evolving Opportunities (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Robichaud, R.

    2014-07-01

    This presentation covers opportunities for wind technology; wind energy market trends; an overview of the National Wind Technology Center near Boulder, Colorado; wind energy price and cost trends; wind turbine technology improvements; and wind resource characterization improvements.

  15. Coherent Optical Transceiver using Circular Polarization-Based Balanced Mixing Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Boulder Nonlinear Systems (BNS) proposes to use its electro-optic component and subsystem expertise to transition a patented heterodyne detection scheme previously...

  16. The Table Mountain Field Site

    Data.gov (United States)

    Federal Laboratory Consortium — The Table Mountain Field Site, located north of Boulder, Colorado, is designated as an area where the magnitude of strong, external signals is restricted (by State...

  17. Conservation of geo- and -biodiversity in Lithuania: are there conflicts?

    Science.gov (United States)

    Skridlaite, Grazina; Motiejunaite, Jurga

    2014-05-01

    Lithuanian surface is sculptured by more than five glaciers, which retreated c. 10 000 years ago. After the ice sheets melted in Lithuania, Latvia and Poland, and other neighbouring countries, they left numerous erratic boulders and boulder fields. Hundreds of single boulders and boulder fields are declared as natural monuments in Lithuania and other countries and are variably protected. Tens of single boulders and boulder fields are included into the Geosites database at the Lithuanian Geological Survey. Rapid weather changes in Lithuania cause the weathering of erratic boulders. However, the fastest erosion is by overgrowing cryptogams: lichenized and non-lichenized fungi, algae, cyanobacteria and bryophytes. Lichens are among the first colonizers of rock surfaces, and their impact on stonework heritage is rather well documented. Hard rocks (e.g. granites) are weathering considerably slower than soft or relatively soft sandstones, dolomites or marbles; however serious impact is visible on stones with inscriptions, drawings and open surfaces of the protected nature monuments. Lichens gradually cover whole boulder surfaces obscuring their geological value and contributing to the surface weathering in Lithuania and neighbouring countries where numerous protected stony nature monuments occur. The 73 of the 723 species of lichenized and allied fungi in Lithuania are confined to hard acid rocks. Eight of these acid rock-dwelling species are included in the Lithuanian Red Data Book, some of them have high threat category or are thought to be extinct now. There is no conservation conflict between the red-listed saxicolous lichens and their substrate where the species are confined to wild boulder meadows. Here lichens and their boulder substrate suffer from excessive growth and overshadowing from surrounding vascular plants, also from pollution which change stone surface properties and induce encroachment of more aggressive species than the usual slow-growing acid rock

  18. Digital Collections Are a Sprint, Not a Marathon: Adapting Scrum Project Management Techniques to Library Digital Initiatives

    OpenAIRE

    Dulock, Michael; Long, Holley

    2015-01-01

    This article describes a case study in which a small team from the digital initiatives group and metadata services department at the University of Colorado Boulder (CU-Boulder) Libraries conducted a pilot of the Scrum project management framework. The pilot team organized digital initiatives work into short, fixed intervals called sprints—a key component of Scrum. Over a year of working in the modified framework yielded significant improvements to digital collection work, including increased ...

  19. Review: Pierre Englebert, Africa: Unity, Sovereignty, and Sorrow (2009 Buchbesprechung: Pierre Englebert, Africa: Unity, Sovereignty, and Sorrow (2009

    Directory of Open Access Journals (Sweden)

    Thomas Bierschenk

    2010-01-01

    Full Text Available Review of the monograph: Pierre Englebert (2009, Africa: Unity, Sovereignty, and Sorrow, Boulder, Co. & London: Lynne Rienner Publishers, ISBN: 978-1-58826-646-0 (Hardcover / 978-1-58826-623-1 (Paperback, 310 pages. Besprechung der Monographie: Pierre Englebert (2009, Africa: Unity, Sovereignty, and Sorrow, Boulder, Co. & London: Lynne Rienner Publishers, ISBN: 978-1-58826-646-0 (Hardcover / 978-1-58826-623-1 (Paperback, 310 Seiten.

  20. Surface Tension of Supercooled Water Down to -21°C Measured within a Horizontal Capillary Tube

    Czech Academy of Sciences Publication Activity Database

    Vinš, Václav; Hošek, Jan; Hykl, Jiří; Hrubý, Jan

    Boulder Colorado: National Institute of Standards and Technology, 2015. PaperID 2611. [Symposium on Thermophysical Properties /19./. 21.06.2015-26.06.2015, Boulder Colorado] R&D Projects: GA MŠk LG13056; GA ČR GJ15-07129Y Institutional support: RVO:61388998 Keywords : capillary tube * horizontal measurement * supercooled water Subject RIV: BJ - Thermodynamics http://thermosymposium.nist.gov/pdf/Abstract_2611.pdf ; http://thermosymposium.nist.gov/program.html

  1. A City for All Citizens: Integrating Children and Youth from Marginalized Populations into City Planning

    OpenAIRE

    Willem van Vliet; Debra Flanders Cushing; Louise Chawla; Mara Mintzer; Victoria Derr

    2013-01-01

    Socially just, intergenerational urban spaces should not only accommodate children and adolescents, but engage them as participants in the planning and design of welcoming spaces. With this goal, city agencies in Boulder, Colorado, the Boulder Valley School District, the Children, Youth and Environments Center at the University of Colorado, and a number of community organizations have been working in partnership to integrate young people’s ideas and concerns into the redesign of parks and civ...

  2. Natural hazards, disasters and human kind: Whither ecosystem management?

    Digital Repository Service at National Institute of Oceanography (India)

    Mascarenhas, A.; Mudholkar, A.V.

    oceanic forces. One year later (January 2006), the boulder wall at Pondicherry city is widened (Figure 2), and the one at Nagapattinam port was rebuilt in concrete (Figure 3), at a higher cost, and as a taller and longer fortification (Mascarenhas... not affect the city coast, except for mild overwash; Bottom: The sea wall, now with large boulders, has been extended about 30 meters sea ward for no reason whatsoever (January 2006) (Photos: A. Mascarenhas and S. Jayakumar, NIO, Goa...

  3. Experimental Investigations of the Properties of Supercooled Water: Surface Tension and Density at Moderate Pressure

    Czech Academy of Sciences Publication Activity Database

    Hrubý, Jan; Vinš, Václav; Peukert, Pavel; Hykl, Jiří

    Boulder Colorado: National Institute of Standards and Technology, 2015. PaperID 2887. [Symposium on Thermophysical Properties /19./. 21.06.2015-26.06.2015, Boulder Colorado] R&D Projects: GA MŠk LG13056 Institutional support: RVO:61388998 Keywords : density * experiment * supercooled state Subject RIV: BJ - Thermodynamics http://thermosymposium.nist.gov/pdf/Abstract_2887.pdf ; http://thermosymposium.nist.gov/program.html

  4. La historia como ficción, una panorámica de la temática de la Revolución Mexicana en la obra de Ignacio Solares

    Directory of Open Access Journals (Sweden)

    José Ávila Cuc

    2011-01-01

    Full Text Available Ignacio Solares, uno de los escritores vivos más importantes de México, aborda en su obra narrativa y dramática -entre otros tópicos-, el tema de la Revolución Mexicana y de personajes ligados a este hecho histórico. Esto sucede específicamente en sus novelas: Madero, el otro; La noche de Ángeles y Columbus; en las obras de teatro: El jefe máximo, El gran elector y Los mochos; y en el libro de cuentos Ficciones de la Revolución Mexicana en donde se recrean momentos claves de esta parte de la historia de México. El siguiente artículo analiza la intertextualidad temática de estas obras y la relación que guardan con la historia de la Revolución, así como su clasificación en lo que se conoce teóricamente como "novela" o "teatro histórico" y/o "texto de motivo histórico" a partir de la forma en que maneja el tema y la conflictividad de los personajes en las situaciones en que se ven inmersos.

  5. Crescimento relativo e composição do ganho de tecidos da carcaça de zebuínos de quatro raças

    Directory of Open Access Journals (Sweden)

    Jorge André Mendes

    2003-01-01

    Full Text Available Utilizaram-se 64 machos não-castrados das raças Gir, Guzerá, Mocho de Tabapuã e Nelore. Em cada raça, os animais foram divididos, aleatoriamente, em cinco categorias. Uma categoria foi abatida imediatamente, três receberam, em baias individuais, ração contendo 50% de concentrado na MS ad libitum (I, II e III e uma recebeu a mesma ração, em quantidade restrita, suprindo níveis de proteína e energia 15% acima da mantença. Os animais I, II e III foram abatidos ao atingirem pesos vivos individuais de 405, 450 e 500 kg, respectivamente. Adotou-se a equação de regressão do logaritmo da quantidade corporal de carcaça e de seus tecidos (muscular, adiposo e ósseo, em função do logaritmo do peso de corpo vazio. Na carcaça, o tecido adiposo, ósseo e muscular tiveram maior impulso para crescimento em idade mais tardia, precoce e intermediário, respectivamente. A carcaça apresentou alometria positiva, refletindo o seu desenvolvimento proporcionalmente maior que o do peso corporal vazio.

  6. Natural hazards mapping of mega sea waves on the NW coast of Egypt

    Science.gov (United States)

    Torab, Magdy; Dalal, Nora

    2015-12-01

    Some boulder fields were deposited by the sea waves during winter storms or by paleo tsunami mega waves and most of these boulders were uprooted from the marine platform and distributed within 90 m of the shoreline, are found up to 4 m above present mean sea level. The objective of this work is defining systematic characterisation of the high-energy depositional contexts working by storms or paleo tsunami deposit, and to reconstruct the history of mega block deposition along the study area, depends upon extensive field surveying and geomorphic mapping by using GIS and GPS techniques as well as statistical analysis of boulders in order to determine both extreme events using the significant wave height and period of maximum observed storms and historical tsunamis along the study area, as well as geomorphic hazard mapping and samples dating. The results show that both possible processes (storm and tsunami waves) can deposit these boulders, it attested at Alexandria for example by the archaeological excavations and historical sources. Tsunami waves and storms cause the displacement of huge boulders from sea bottom and submersible marine terraces (platforms) to the beach due to its major power and ability of carving and graving it is also capable of pulling other boulders from the land and redeposit it on the beach or coastline.

  7. Surface-exposure ages of Front Range moraines that may have formed during the Younger Dryas, 8.2 cal ka, and Little Ice Age events

    Science.gov (United States)

    Benson, L.; Madole, R.; Kubik, P.; McDonald, R.

    2007-01-01

    Surface-exposure (10Be) ages have been obtained on boulders from three post-Pinedale end-moraine complexes in the Front Range, Colorado. Boulder rounding appears related to the cirque-to-moraine transport distance at each site with subrounded boulders being typical of the 2-km-long Chicago Lakes Glacier, subangular boulders being typical of the 1-km-long Butler Gulch Glacier, and angular boulders being typical of the few-hundred-m-long Isabelle Glacier. Surface-exposure ages of angular boulders from the Isabelle Glacier moraine, which formed during the Little Ice Age (LIA) according to previous lichenometric dating, indicate cosmogenic inheritance values ranging from 0 to ???3.0 10Be ka.11Surface-exposure ages in this paper are labeled 10Be; radiocarbon ages are labeled 14C ka, calendar and calibrated radiocarbon ages are labeled cal ka, and layer-based ice-core ages are labeled ka. 14C ages, calibrated 14C ages, and ice core ages are given relative to AD 1950, whereas 10Be ages are given relative to the sampling date. Radiocarbon ages were calibrated using CALIB 5.01 and the INTCAL04 data base Stuiver et al. (2005). Ages estimated using CALIB 5.01 are shown in terms of their 1-sigma range. Subangular boulders from the Butler Gulch end moraine yielded surface-exposure ages ranging from 5 to 10.2 10Be ka. We suggest that this moraine was deposited during the 8.2 cal ka event, which has been associated with outburst floods from Lake Agassiz and Lake Ojibway, and that the large age range associated with the Butler Gulch end moraine is caused by cosmogenic shielding of and(or) spalling from boulders that have ages in the younger part of the range and by cosmogenic inheritance in boulders that have ages in the older part of the range. The surface-exposure ages of eight of nine subrounded boulders from the Chicago Lakes area fall within the 13.0-11.7 10Be ka age range, and appear to have been deposited during the Younger Dryas interval. The general lack of inheritance in

  8. Crater Boguslawsky on the moon: Geological structure and an estimate of the degree of rockiness of the floor

    Science.gov (United States)

    Ivanov, M. A.; Basilevsky, A. T.; Abdrakhimov, A. M.; Karachevtseva, I. P.; Kokhanov, A. A.; Head, J. W.

    2015-12-01

    The paper considers the results of a study of the geological structure of the floor of the crater Boguslawsky selected as a primary target for the Luna-Glob mission. The deplanate floor of the crater is covered by the material ejected from remote craters and the crater Boguslawsky-D on the eastern inner slope of the crater Boguslawsky. It is highly probable that the sampling of the crater Boguslawsky-D ejecta will provide the unique possibility to detect and analyze the material that predates the formation of the largest and most ancient currently known basin on the Moon—the South Pole-Aitken basin. The rockiness degree of the Boguslawsky crater floor has been estimated from the radar data and the manual boulder counts in the superresolution images (0.5 m/pixel obtained with the Narrow Angle Camera from the Lunar Reconnaissance Orbiter). Comparison of the radar data to the results of the photo-geological analysis shows that the main contributor to the radar signal is the rock debris located in the subsurface layer sounded by radar (1-1.5 m), while there are practically no boulders on the surface. The two most rocky regions on the crater Boguslawsky floor are associated with the relatively fresh impact craters 300-400 m in diameter. The spatial density of boulders near the craters suggests that one of them is 30-50 Myr older than the other. For both of these craters, the spatial density of boulders drops with the distance from their rims. The rate of the decrease in the boulder spatial density is the same for both craters, which points to the constant-in-time intensity of the fragmentation of boulders. The size distribution of boulders versus the distance from a rim of the older crater is approximated by the curve with a slope of-0.02, while the curve slope for the younger crater is-0.05. The gentler curve slope for the older crater is obviously connected with the equalization of sizes of the rock debris with time. The size-frequency distribution of all rock

  9. Comunidades herpetológicas de la reserva de La Quebrada, Río Ceballos, Córdoba (Argentina

    Directory of Open Access Journals (Sweden)

    Gavier, Gregorio

    2003-11-01

    Full Text Available La presente investigación se desarrolló en un ambiente característico de las sierras Chicas de Córdoba, la Reserva La Quebrada. El objetivo del estudio fue describir la composición y diversidad de la comunidad herpetofaunística, sus cambios estacionales, y estudiar si existen comunidades diferentes asociadas a los ecosistemas de pastizal, bosque y borde de arroyo. También se analizó su relación con las variables ambientales climáticas. Se instalaron de una a tres líneas de muestreo por ambiente, cada una con 15 trampas de caída separadas por una distancia de 10 m, que se revisaron mensualmente entre febrero de 1991 y mayo de 1994. Se capturaron 147 especímenes distribuidos entre 21 especies: 8 anfibios (n= 114, 8 ofidios (n= 9 y 5 saurios (n= 24. Odontophrynus occidentalis e Hyla pulchella cordobae sumaron alrededor del 60% de la abundancia total. H. p. cordobae fue la especie de distribución más amplia. Las especies más abundantes en los diferentes ambientes fueron Odontophrynus americanus y Leptodactylus gracilis en pastizal, O. occidentalis y Mabuya dorsivittata en bosque, O. occidentalis e H. p. cordobae en bordes de arroyo. Los ambientes estudiados no mostraron diferencias en cuanto a la riqueza o abundancia de individuos, pero sí en relación a la composición de las comunidades y los cambios estacionales en abundancias. La diversidad fue mayor en el pastizal (H'=1,93 con respecto al bosque (H'=1,41 y al borde de arroyo (H'=1,19. Abundancia, riqueza y diversidad para la Reserva en su conjunto correlacionaron en forma directa con temperatura y precipitación. Se comprobó la existencia de dos comunidades diferentes, una relacionada al ambiente de pastizal y otra a la unidad formada por el bosque y el borde de arroyo. Las altas tasas de deforestación registradas en el área podrían modificar las relaciones de abundancias entre especies y los patrones de biodiversidad en el área.La presente investigación se desarrolló en

  10. Preliminary Cosmogenic Nuclide Chronology of Late Pleistocene Missoula Floods

    Science.gov (United States)

    Balbas, A.; Clark, J.; Clark, P. U.; Caffey, M. W.; Woodruff, T. E.; Baker, V. R.

    2014-12-01

    The Missoula floods had the largest known peak flood discharges of fresh water known from the geologic record. Multiple floods are believed to have originated from the failure of the Purcell trench ice lobe, which dammed glacial Lake Missoula. The flood waters traveled westward creating the Channeled Scabland region, a spectacular complex of anastomosing channels, coulees, cataracts, loess islands, rock basins, broad gravel deposits, and immense gravel bars in east-central Washington State. Several important questions about the Missoula floods and the formation of the Channeled Scabland remain, primarily due to the few geochronological constraints on their timing. Attempts to date the duration of the multiple floods have produced a wide range of ages (13-19 ka from land deposits and 13-31 ka from marine cores), but few of these directly constrain the age of the major flood landscape elements. Here we present 14 new in situ cosmogenic 10Be ages from quartz-bearing boulders deposited at four sites in eastern Washington. Wallula Gap is a narrow constriction along the Columbia River between Oregon and Washington. Hydraulic damming of floodwater at Wallula Gap created glacial Lake Lewis. Surface exposure ages on large boulders found at over 300 m elevation above the river at this site will date the largest flood events. The Wenatchee region represents the most northwestern area influenced by flooding. Dates from this area will determine when flooding occurred after the retreat of the Okanogan lobe. We sampled boulders from the lower Pangborn Bar, ice-rafted boulders north of Wenatchee, and boulders from a flood bar on the Columbia River north of Wenatchee. A boulder from the Mattawa Fan was sampled to assess the last time a megaflood came through the Sentinel Gap. Finally, in order to constrain the last debris dam failure at the southern end of the Upper Grand Coulee, we sampled flood boulders deposited on the Ephrata Fan.

  11. Estudio de la flora de comunidades ruderales antropogénicas en la IX Región de la Araucanía, Chile

    OpenAIRE

    Ramírez García, Carlos; San Martín Padovani, Cristina; Ojeda, Pedro

    1999-01-01

    Se estudió la flora ruderal de cuatro formaciones vegetales antropogénicas (matorrales de Pica-Pica, praderas, lagunas y arroyos con vegetación palustre y acuática) en la zona ubicada al poniente de la ciudad de Temuco (IX Región de la Araucanía, Chile). La lista de especies presentes se obtuvo de la primera columna de una tabla de vegetación formada por 403 censos, que fueron levantados con la metodología fitosociológica del Sur de Europa. Se encontró un total de 262 especies vegetales, con ...

  12. Ecological Restoration of the La Primavera Forest Geothermal Zone, Jalisco, Mexico; Restauracion ecologica de lazona geotermica del bosque La Primavera, Jalisco, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Pastrana Melchor, Eugenio J.; Manon Mercado, Alfredo; Hernandez Ayala, Cuauhtemoc [Gerencia de Proyectos Geotermoelectricos de la Comision Federal de Electricidad, Morelia, (Mexico)

    1997-05-01

    The Bosque La Primavera is an oak-pine forest covering a surface estimated in 36 000 hectares. It is located westerly from Guadalajara City, Jalisco. Over a small part of the forest, between 1980 and 1988 the Comision Federal de Electricidad (Federal Commission for Electricity, or CFE) carried out several works to drill 13 geothermal wells, which caused environmental impacts on 53 hectares of the forest; this means 0.15% of the forestry area. In March 1989 the CFE suspended its geothermal exploration and development activities in the zone, and started an exhaustive program to restore the environmental impacts. So, between 1989 and 1994 different works were done within two hydrographic micro-basins (named the Arroyo El Caracol and Arroyo El Huilustre micro-basins) where the CFE works are located. Objectives were to reduce the exposed to erosion areas at the high portions of those micro-basins, and to retain sediments at low portions of the same. Up to now the erosion index, which have been monitored by CFE each year, have reached comparable values to those from the beginning of eighties. This means those restoration works are successful. [Espanol] El bosque La Primavera se encuentra constituido principalmente por encino-pino con una superficie aproximada de 36 mil hectareas, localizado al occidente de la ciudad de Guadalajara, Jalisco. En una pequena porcion de el, la Comision Federal de Electricidad (CFE) llevo a cabo, entre 1980 y 1988, diversas obras para perforar un total de 13 pozos geotermicos que ocasionaron impactos al ambiente en 53 hectareas del bosque, correspondientes al 0.15% de la superficie boscosa. A partir de marzo de 1989 la CFE suspendio sus actividades de exploracion y desarrollo geotermico en la zona, para llevar a cabo un exhaustivo programa de restauracion ecologica de los impactos ambientales. Asi, entre 1989 y 1994 se realizaron trabajos en las dos microcuencas hidrograficas en las que se ubican las obras realizadas por la CFE, las

  13. Variación estacional del uso y preferencia de los tipos vegetacionales por el venado cola blanca en un bosque tropical de Jalisco

    OpenAIRE

    S. Mandujano; S. Gallina; G. Arceo; L. A. P\\u00E9rez Jim\\u00E9nez

    2004-01-01

    El venado cola blanca (Odocoileus virginianus) habita el bosque tropical de Chamela en la costa Pacífica del estado de Jalisco, México. En esta región la vegetación dominante es el bosque tropical caducifolio el cual se establece en las colinas y se caracteriza porque en el estrato arbóreo y sotobosque dominan especies que pierden sus hojas durante seis a siete meses en la época seca. En contraste, la vegetación que se encuentra a lo largo de los arroyos y ríos es el bosque tropical subperenn...

  14. Response to Esteve-Gassent et al.: flaB sequences obtained from Texas PCR products are identical to the positive control strain Borrelia burgdorferi B31

    OpenAIRE

    Norris, Steven J; Barbour, Alan G.; Fish, Durland; Diuk-Wasser, Maria A.

    2015-01-01

    Feria-Arroyo et al. had reported previously that, based on PCR analysis, 45 % of Ixodes scapularis ticks collected in Texas and Mexico were infected with the Lyme disease spirochete Borrelia burgdorferi (Parasit. Vectors 2014, 7:199). However, our analyses of their initial data (Parasit. Vectors 2014, 7:467) and a recent response by Esteve-Gassent et al. (Parasit. Vectors 2015, 8:129) provide evidence that the positive PCR results obtained from both ribosomal RNA intergenic sequences and the ...

  15. Response to Esteve-Gassent et al.: flaB sequences obtained from Texas PCR products are identical to the positive control strain Borrelia burgdorferi B31.

    Science.gov (United States)

    Norris, Steven J; Barbour, Alan G; Fish, Durland; Diuk-Wasser, Maria A

    2015-01-01

    Feria-Arroyo et al. had reported previously that, based on PCR analysis, 45% of Ixodes scapularis ticks collected in Texas and Mexico were infected with the Lyme disease spirochete Borrelia burgdorferi (Parasit. Vectors 2014, 7:199). However, our analyses of their initial data (Parasit. Vectors 2014, 7:467) and a recent response by Esteve-Gassent et al. (Parasit. Vectors 2015, 8:129) provide evidence that the positive PCR results obtained from both ribosomal RNA intergenic sequences and the flagellin gene flaB are highly likely due to contamination by the B. burgdorferi B31 positive control strain. PMID:26050617

  16. Relaciones tróficas de los principales macroinvertebrados en sistemas lóticos de la llanura pampeana: su relación con la calidad de agua

    OpenAIRE

    López van Oosterom, María Vanesa

    2014-01-01

    El ecosistema fluvial integra la biota, interacciones biológicas y procesos físicos y químicos que determinan cómo funcionan dichos sistemas. En los arroyos pampeanos tanto el biofilm como las macrófitas acuáticas constituyen recursos basales importantes para las comunidades acuáticas de macroinvertebrados. Dichos recursos también proporcionan energía acumulada en forma de materia orgánica. Además en estos ambientes los valores de nutrientes son eleva¬dos. El análisis del complejo biológico r...

  17. ASPECTOS METODOLÓGICOS A TENER EN CUENTA PARA LA IMPLEMENTACIÓN DEL FITOMEJORAMIENTO PARTICIPATIVO EN AGRICULTURA URBANA

    OpenAIRE

    María de los A. Pino; María E. Dominí; Ramírez, A.; Loracnis Hernández; M. Ponce; E. Cálves; Z. Terán; Ania Yong; H. Ríos

    2005-01-01

    La experimentación con metodologías participativas en el contexto urbano permitió al presente trabajo demostrar la factibilidad de aplicar el fitomejoramiento participativo, como vía de acceso a la diversidad agrícola para los agricultores urbanos, que también involucró a los actores locales de los municipios de San José de las Lajas y Arroyo Naranjo, y cuyos resultados permitieron la obtención de una metodología de trabajo y el aumento de la diversidad en los cultivos de tomate, habichuela, ...

  18. Os sentidos e significados atribuidos ao saber cultural no currículo

    OpenAIRE

    Iara Aquino Henn

    2010-01-01

    O presente artigo é fruto de uma pesquisa realizada na proposta pedagógica de Educação de Pessoas Jovens e Adultas de uma escola pública no Brasil. Investigamos os sentidos que os jovens e adultos atribuem aos conhecimentos construídos nas suas trajetória de vida e os significados que são produzidos na relação da sua cultura com os outros conhecimentos. A partir das reflexões de autores como Silva (2003), Padilha (2004), Hall (1997, 2003) Arroyo (2001), Fonseca (2002) indicamos três categoria...

  19. Desarrollo e instalación de instrumentos para la verificación del funcionamiento de una obra hidráulica

    OpenAIRE

    Guaraglia, Dardo; García, Pablo Andrés; Carner, José Luis; Spinelli, Enrique Mario

    2013-01-01

    En este trabajo se describe el desarrollo, implementación, instalación y seguimiento de un sistema de recolección de variables hidráulicas, utilizado para la evaluación de los túneles Aliviadores del Arroyo Maldonado en la Ciudad Autónoma de Buenos Aires (CABA). Esta obra posee características particulares, que demandan un diseño específico del sistema, cuidados especiales en la selección e instalación de los instrumentos y en la recolección de los datos. Por este motivo, se desarrollaron par...

  20. FACTORES DETERMINANTES DE SOBREPESO Y OBESIDAD EN INFANTES DE UN CÍRCULO INFANTIL / Determinants of overweight and obesity in infants of a day nursery

    OpenAIRE

    Esperanza Castro Leyva; Kenia M Rodríguez Oropesa; Elsa Agüero Argilagos; Bethania K. Cabrera Hernández; Ela M. Céspedes Miranda; Niurelkis Suárez Castillo; Ernesto Morales Morales; Ionmara Tadeo Oropesa

    2012-01-01

    ResumenIntroducción y objetivos: El incremento de la obesidad infantil es alarmante. Su persistencia en la adultez es causa de una alta tasa de morbilidad y mortalidad por enfermedades cardiovasculares. Esta investigación se realizó con el propósito de detectar tempranamente los niños sobrepeso y obesos del Círculo Infantil Volodia, de Arroyo Naranjo en La Habana, Cuba; así como para identificar algunos factores de riesgo asociados. Método: Se estudiaron 122 infantes de ambos sexos (59 niñas ...

  1. La técnica vocal en la Edad Media. Diez siglos de práctica del canto

    OpenAIRE

    Guerrero Rodríguez, Héctor

    2015-01-01

    Tesis Doctoral leída en la Universidad Rey Juan Carlos de Madrid en 2015. Director de la Tesis: Félix Labrador Arroyo Como intérprete de canto, solista o miembro de un coro he sentido siempre un vacío de documentación respecto de la técnica a utilizar en la música antigua. Interpretando repertorio de la Edad Media, el Renacimiento o el Barroco, e incluso el primer Romanticismo, siempre se me ha pedido una técnica vocal común a todas las épocas de la Historia de la Música; técni...

  2. Sobre la presencia de Vitreorana oyampiensis (Lescure, 1975 (Amphibia: Centrolenidae en Bolivia

    Directory of Open Access Journals (Sweden)

    Muñoz, Arturo

    2009-11-01

    Full Text Available República de Bolivia, departamento de Pando, provincia Federico Román, reserva de Vida Silvestre Bruno Racua, arroyo Tambaqui (9º 50' 15,3" S, 65º 33' 09,0" O. Fecha de colección: 16 y 17 noviembre, 2006. Colector: Arturo Muñoz. Colección de vertebrados Museo de Historia Natural Alcide d’Orbigny (MHNCA-1054, MHNCA-1057, MHNCA-1072, Cochabamba, Bolivia. Tres ejemplares adultos, machos (19,92; 20,56; 19,98 mm LHC respectivamente.

  3. Paisajes vulnerables: estrategias y espacios de diálogo para un turismo sustentable

    OpenAIRE

    Mines, Patricia; Tosello, María Elena; Mihura, Enrique

    2015-01-01

    La Micro Región Insular Santa Fe, Rincón y Leyes está caracterizada por un territorio atravesado por riachos, arroyos y zonas de islas que poseen alta biodiversidad, con un patrimonio natural y cultural asociado a esa riqueza, a las huellas de los usos y procesos productivos que en ellos tienen y tuvieron lugar; con poblaciones y dinámicas heterogéneas; servicios e infraestructuras insuficientes; patrones de uso del suelo no concertados interjurisdiccionalmente y dispar grado de concientizaci...

  4. Los deslizamientos de la cordillera neuquina al sur delos 38° S: suinducción Mass wasting in the Neuquén Cordillerasouth of 38º: its trigger factors

    OpenAIRE

    Emilio F González Díaz; Andrés Folguera

    2009-01-01

    Las conclusiones sobre losdeslizamientos individualizados en la cordillera neuquina (36°-38°S), (suinducción sísmica; rechazo de la consideración de sus depósitos como till),indujo a proyectar su estudio al sur de los 38°S. Se distinguieron inéditaszonas de deslizamientos, cuya promoción y contexto sismotectónico difieren delos reconocidos entre los 36°-38°S. Su estudio regional, que abarcó trescomarcas (Aluminé, Chapelco y Arroyo Limay Chico), comprobó el predominio delas corrientes de tierr...

  5. Los deslizamientos de la cordillera neuquina al sur delos 38° S: suinducción

    OpenAIRE

    Emilio F González Díaz; Andrés Folguera

    2009-01-01

    Las conclusiones sobre losdeslizamientos individualizados en la cordillera neuquina (36°-38°S), (suinducción sísmica; rechazo de la consideración de sus depósitos como till),indujo a proyectar su estudio al sur de los 38°S. Se distinguieron inéditaszonas de deslizamientos, cuya promoción y contexto sismotectónico difieren delos reconocidos entre los 36°-38°S. Su estudio regional, que abarcó trescomarcas (Aluminé, Chapelco y Arroyo Limay Chico), comprobó el predominio delas corrientes de tierr...

  6. EFECTOS DE UN PROGRAMA DE AQUAEROBIC SOBRE LA COMPOSICIÓN CORPORAL, EN LAS MUJERES ACTIVAS DE MEDIANA EDAD

    OpenAIRE

    Asunción Grager; Christian Clemente; Juan José Manzano; Guillermo Olcina

    2011-01-01

    Objetivo: Describir y analizar las modificaciones en la composición corporal, en las mujeres de mediana edad, después de realizar un programa de actividad física, basado en el aquaerobic, y un posterior periodo de desentrenamiento. Material y método: El grupo analizado estuvo integrado por diecisiete mujeres de Arroyo de San Serván (Badajoz), físicamente activas (habían realizado programas de gimnasia de mantenimiento, con una frecuencia de una a tres sesiones semanales, durante los últimos t...

  7. SELECCIÓN PARTICIPATIVA DE VARIEDADES Y EXPERIMENTACIÓN CAMPESINA EN AGRICULTURA URBANA EN EL CULTIVO DEL PLÁTANO (Musa spp.)

    OpenAIRE

    María de los A. Pino; Loracnis Hernández; María E. Dominí; Ramírez, A; Z. Terán; E. Calves

    2007-01-01

    El objetivo del trabajo fue probar si mediante la aplicación de la metodología de selección participativa de variedades y experimentación campesina en agricultura urbana en San José de las Lajas, provincia La Habana y Arroyo Naranjo, Ciudad de La Habana, se podía introducir, adoptar y diseminar biodiversidad vegetal en el cultivo de plátanos y bananos (Musa spp) en parcelas y patios. Los resultados mostraron las posibilidades que brindan las metodologías participativas para introducir y adop...

  8. Efectos, agentes y procesos tafonómicos en el área interserrana bonaerense

    OpenAIRE

    Gutiérrez, María Amelia

    2006-01-01

    Este trabajo comprende el estudio, desde una perspectiva tafonómica, del material óseo proveniente de tres sitios arqueológicos, Paso Otero l, Arroyo Seco 2 y Laguna Tres Reyes J, ubicados en el área Interserrana bonaerense. El objetivo es examinar los diferentes agentes involucrados en los procesos tafonómicos que tuvieron lugar en el registro arqueofaunístico del área durante el Pleistoceno final y el Holoceno con el fin de proponer un modelo acerca de su historia tafonómica. Para lograr ta...

  9. DISTRIBUIÇÃO DE HORTALIÇAS E RAÍZES EM ITABAIANA/SE

    Directory of Open Access Journals (Sweden)

    Diana Mendonça de Carvalho

    2011-01-01

    arroyos y vegetales de raíz en la dirección de las importaciones y las exportaciones. Por lo tanto, visto que los flujos causados por estos productos estimulado la relación vinculante zonas rurales y urbanas a nivel nacional, regional y local, así como estimular la transformación de la Municipalidad de Itabaiana en el centro principal de distribución para las hortalizas y las raíces del estado de Sergipe.

  10. Inundaciones y Riesgos Ambientales

    OpenAIRE

    Díez Herrero, Andrés

    2014-01-01

    Las inundaciones fluviales consisten en el anegamiento de ‘ terrenos normalmente secos ’ , ubicados en las márgenes de las corrientes fluviales (ríos, arroyos, ramblas...), como consecuencia del desbordamiento del canal o canales ante su incapacidad para albergar el aumento de caudal que suponen las crecidas y/o avenidas. Las inundaciones son los desastres naturales con mayor repercusión socioeconómica, tanto a escala mundial como en lo que se refiere a nuestro país. Basta recordar, en ese se...

  11. Radiactividad natural en la zona costera del departamento de Rocha, Uruguay

    OpenAIRE

    Noguera, Ana; Bentos Pereira, Heinkel; Fornaro, Laura

    2012-01-01

    La costa este uruguaya posee una riqueza enorme de ecosistemas como ser dunas, mar, ríos, arroyos y aguas subterráneas, así como una inmensa variedad de fauna y flora. En dicha área están presentes además recursos minerales, los cuales incluyen yacimientos de arenas negras, con 7 millones de toneladas de metales pesados evaluados en el área de Aguas Dulces – Valizas. Estos yacimientos están compuestos entre otros minerales por 0.6 % of monacita. Como resultado están presentes todos los radion...

  12. TIEMPOS DE APILADO DEL BAGAZO DEL MAGUEY MEZCALERO Y SU EFECTO EN LAS PROPIEDADES DEL COMPOST PARA SUSTRATO DE TOMATE

    OpenAIRE

    Gabino Alberto MARTÍNEZ GUTIÉRREZ; Gilberto ÍÑIGUEZ COVARRUBIAS; Yolanda Donají ORTIZ-HERNÁNDEZ; Juana Yolanda LÓPEZ-CRUZ; Martha Angélica BAUTISTA CRUZ

    2013-01-01

    La industria del mezcal en Oaxaca, México produce anualmente 122 696 toneladas de bagazo de maguey mezcalero (Agave spp.), producto de desecho subutilizado que es incinerado o vertido en ríos y arroyos, ocasionando un grave problema ambiental. Con la finalidad de utilizar el bagazo como sustrato orgánico alternativo para el cultivo sin suelo de tomate (Solanum lycopersicum L.), se evaluaron tres compost con diferentes tiempos de apilado (0, 90 y 180 días). Se determinó en cada uno de los mate...

  13. Aprovechamiento hidráulico de la fuente principal de la comunidad de aguas del Maimón : proyecto de viabilidad técnica y económica

    OpenAIRE

    Campuzano Bolarín, Fernando

    2011-01-01

    El principal objetivo consiste en desarrollar los estudios necesarios para llevar a cabo el aprovechamiento microhidraúlico real del cauce de un arroyo de origen subterráneo ubicado en la Solana de la montaña Maimón en Vélez Blanco (Almería), para ello se realizará un proyecto de viabilidad técnica y otro proyecto de viabilidad económico. El primero, el proyecto técnico tiene como principal objetivo determinar la mejor alternativa técnica posible de entre las que se plantará...

  14. Decision theories used in planning of areas around La Colacha basin in Córdoba (Argentine) considering natural and human hazards

    OpenAIRE

    Antón Corrales, José Manuel; Grau Olive, Juan Bautista; Tarquis Alfonso, Ana Maria; Cisneros, J M; Andina de la Fuente, Diego

    2010-01-01

    The authors of U.P.M. have had relations with Argentine Universities and Administrations, in part with J.M.Cisneros that is Professor at Universidad Nacional de Rio Cuarto in Prov. de Córdoba Arg., and have applied Decision Theories with Mathematic tools for the planning of defences and uses of soils in these areas and especially of La Colacha bassin enlarged with larger areas around it as “Cuenca de los Arroyos Menores” at West and South of Rio Cuarto. These large flat lands have loess soils ...

  15. Turismo ecológico. Puesta en valor de la Cuenca del Salado

    OpenAIRE

    Bertoni, Marcela

    2002-01-01

    El presente aporte plantea la conceptualización del turismo ecológico, como modalidad del modelo de turismo alternativo, como una nueva modalidad turística que se caracteriza por compatibilizar la conservación de los recursos con su utilización turística recreativa a los fines de garantizar una experiencia recreativa de calidad. Por lo tanto, se realiza un reconocimiento de los recursos naturales, humedales, lagunas, ríos arroyos, sierras, áreas naturales protegidas y actividades deportivas, ...

  16. Análise da qualidade da água do Ribeirão Sobradinho – contaminação ambiental e qualidade de vida, Distrito Federal, 2011

    OpenAIRE

    Fabielle Melissa ZORZIN; Ogata, Fernanda dos Santos; Flávia Alves Neves MASCARENHAS; Joice Vinhal Costa ORSINE; Lívia Maria SANTANNA; Luciani Martins RICARDI; Melissa Sousa de ASSIS; Mona Lisa Sousa de Assis BITTENCOURT; Walter Massar RAMALHO; Fernando Ferreira CARNEIRO

    2011-01-01

    El objetivo de este estudio fue evaluar la calidad del agua del arroyo Sobradinho a través de análisis fisicoquímico y microbiológicos para apoyar las acciones del gobierno y de la sociedad. Se recogieron muestras de água desde cuatro puntos diferentes: cerca de la naciente (A), cerca de la salida de alcantarillado de la Companhia de Saneamento Ambiental do Distrito Federal- CAESB (B), Parque Jequitibá (C) y cerca de la salida de Sobradinho, BR- 020 (D). Para la ...

  17. Influencia de la gestión del acuífero sobre los humedales del manto eólico de Doñana

    OpenAIRE

    Manzano Arellano, María del Sol; Custodio Gimena, Emilio; Higueras, H.; Puig Vidal, Rita; Soler, A.

    2009-01-01

    Doñana es conocida sobre todo por las marismas, pero sobre el manto eólico litoral que cubre buena parte del área occidental de la zona existen cientos de pequeños y medianos humedales (lagunas, arroyos y criptohumedales) de agua dulce que generan una gran variedad de ecosistemas. La mayor parte de ellos están vinculados al acuífero de arenas, y su hidrología e hidroquímica de penden de la posición particular de cada uno respecto a la red regional de flujo de agua subterránea. El bombeo inten...

  18. Contaminación por nitratos del acuífero freático en la cuenca Martín-Carnaval (partido de La Plata, provincia de Buenos Aires)

    OpenAIRE

    Hernández, Mario Alberto; Minghinelli, Leonardo F.

    1996-01-01

    Como parte de un estudio hidrogeológico integral del acuífero freático en la cuenca de los arroyos Martín-Carnaval (Partido de La Plata), son analizados los tenores de nitratos presentes en dicho sistema. En dos sectores pudo comprobarse la existencia de concentraciones que superan el límite de 45 mg/l recomendado para aguas de consumo humano por la Organización Mundial de la Salud (OMS) año 1984. En uno de ellos el origen estaría vinculado a la aplicación no controlada de fertilizantes nit...

  19. La sexualidad en adolescentes de la secundaria básica "Viet Nam" Sexuality of adolescent students in "Viet Nam" junior high school

    OpenAIRE

    Elisa Puentes Rizo; Bárbara Enríquez Domínguez; Yisel Rodríguez de Celis; Manuel Correa Jáuregui

    2012-01-01

    Introducción: en la actualidad existe en los adolescentes una temprana iniciación de las relaciones sexuales y cambios en la actitud social hacia la sexualidad. Objetivo: identificar las particularidades y conocimientos sobre sexualidad en adolescentes. Métodos: se realizó una investigación descriptiva y transversal en adolescentes entre los 12 y 15 años, de la secundaria básica "Viet Nam" del municipio Arroyo Naranjo, durante los años 2009-2010. El universo estuvo constituido por 296 estudia...

  20. Impacto de la producción lechera en la calidad de los cuerpos de agua

    OpenAIRE

    Rafael Arocena; Guillermo Chalar; Carlos Perdomo; Daniel Fabián; Juan Pablo Pacheco; Mauricio González; Vanesa Olivero; Macarena Silva; Verónica Etchebarne

    2013-01-01

    La producción lechera es de las actividades de mayor desarrollo y más contaminantes en Uruguay. A efectos de evaluar y mitigar su impacto en la calidad del agua, se relacionan el modo de producción y de manejo de los efluentes lecheros con diversos indicadores de calidad de los arroyos receptores, en diez microcuencas de un embalse reserva de agua potable para Montevideo. Se analizó el agua subterránea en pozos, el contenido de fósforo del suelo, la calidad del ambiente y del agua de los curs...

  1. Impacto de la producción lechera en la calidad de los cuerpos de agua

    OpenAIRE

    Arocena, Rafael; Chalar, Guillermo; Fabián, Daniel; Pacheco, Juan Pablo; González Piana, Mauricio; Olivero, Vanesa; Silva, Macarena; García, Patricia; Etchebarne, Verónica; Perdomo, Carlos H.

    2012-01-01

    La producción lechera es de las actividades de mayor desarrollo y más contaminantes en Uruguay. A efectos de evaluar y mitigar su impacto en la calidad del agua, se relacionan el modo de producción y de manejo de los efluentes lecheros con diversos indicadores de calidad de los arroyos receptores, en diez microcuencas de un embalse reserva de agua potable para Montevideo. Se analizó el agua subterránea en pozos, el contenido de fósforo del suelo, la calidad del ambiente y del agua de los curs...

  2. Estudio del recurso hidráulico y proyecto de una central minihidráulica en la cuenca del río Tormes

    OpenAIRE

    Ruiz Molina, Pablo

    2013-01-01

    El objeto de este proyecto ha sido el diseño y estudio de viabilidad de una mini-central hidráulica en el pueblo Hoyos del Espino en la provincia de Ávila. A partir de la confluencia de tres arroyos afluentes del Tormes, se ha conseguido generar 0,5 MW de potencia. La idea de este proyecto surge por dos motivos, el primero, la necesidad de España y Europa de potenciar energía limpia, libre de CO2, con el fin de cumplir el Objetivo 20-20-20, y por otra parte, se busca con este e...

  3. Terrestrial cosmogenic surface exposure dating of glacial and associated landforms in the Ruby Mountains-East Humboldt Range of central Nevada and along the northeastern flank of the Sierra Nevada

    Science.gov (United States)

    Wesnousky, Steven G.; Briggs, Richard W.; Caffee, Marc W.; Ryerson, F. J.; Finkel, Robert C.; Owen, Lewis A.

    2016-09-01

    Deposits near Lamoille in the Ruby Mountains-East Humboldt Range of central Nevada and at Woodfords on the eastern edge of the Sierra Nevada each record two distinct glacial advances. We compare independent assessments of terrestrial cosmogenic nuclide (TCN) surface exposure ages for glacial deposits that we have determined to those obtained by others at the two sites. At each site, TCN ages of boulders on moraines of the younger advance are between 15 and 30 ka and may be associated with marine oxygen isotope stage (MIS) 2. At Woodfords, TCN ages of boulders on the moraine of the older advance are younger than ~ 60 ka and possibly formed during MIS 4, whereas boulders on the correlative outwash surface show ages approaching 140 ka (~ MIS 6). The TCN ages of boulders on older glacial moraine at Woodfords thus appear to severely underestimate the true age of the glacial advance responsible for the deposit. The same is possibly true at Lamoille where clasts sampled from the moraine of the oldest advance have ages ranging between 20 and 40 ka with a single outlier age of ~ 80 ka. The underestimations are attributed to the degradation and denudation of older moraine crests. Noting that boulder ages on the older advances at each site overlap significantly with MIS 2. We speculate that erosion of the older moraines has been episodic, with a pulse of denudation accompanying the inception of MIS 2 glaciation.

  4. Evaluation of the 210Po method at the Midwest uranium deposit, northern Saskatchewan, Canada

    International Nuclear Information System (INIS)

    Vertical profiles of 210Po in soils near the Midwest uranium deposit and an associated surficial radioactive sandstone boulder train in northern Saskatchewan show a high 210Po background in air-dried forest litter (24 pCi/g) and Ah horizon soil (11 pCi/g) relative to lower soil horizons (210Po signal from the radioactive boulders in the near-surface soil horizons. Only in the Bf and C horizons can the existence of the radioactive boulders be inferred from 210Po determinations. For comparative purposes profiles for 226Ra, U, Ni, and other trace elements are also presented. Escape of most of the Rn from near surface soils into the atmosphere, homogenization and decay of Rn, and precipitation of decay products back onto surface soils satisfactorily explain the field observations discussed here. Compared to the highly anomalous 222Rn signal in soil gases over this boulder train the 210Po contrast is very weak and is of little use for prospecting for this type of boulder train. The relatively high 210Po background in surficial materials relative to lower soil horizons dictates that great care be taken with the 210Po method; the deepest possible horizons should be sampled. (orig.)

  5. Preliminary study on the erratic exposure ages of Grove Mountains, East Antarctica

    Institute of Scientific and Technical Information of China (English)

    Li Guangwei; Liu Xiaohan; Huang Feixin; Kong Ping; Fink David; Wei Lijie; Fang Aimin

    2009-01-01

    The first study of erratic boulder exposure ages in the Grove Mountains, interior Antarctica, indicates the two erratic boulders (060131-1 and 060131-2, collected from a typical nunataks, Zakharoff Ridge in the Grove Mountains) have 10Be minimum exposure ages of 1.24±0.11 Ma, 1.37±0.12 Ma, and 26Al ages of 0.90±0.12 Ma,0.44±0.04 Ma, respectively. Meanwhile, another erratic boulder sample 060131-4, coming from vicinal ice surface, has 10Be and 26Al minimum exposure ages of 0.47±0.3 Ma and 0.44±0.04 Ma, respectively. The exposure ages of the three erratic boulders are nearly similar to the bedrocks with the similar elevation. Thus, using the technique of in situ produced terrestrial cosmogenic nuclides, the ice sheet evolution histories in the Grove Mountains reflected by erratic boulder and bedrock exposure ages are basically consistent.

  6. Petrografía y geoquímica del magmatIsmo cretácico superior-eoceno en el área de PichaIhue, provincia de Neuquén Petrography and geochemistry of Upper Cretaceous-Eocene magmatism in the Pichaihue area, Neuquén Province

    Directory of Open Access Journals (Sweden)

    M. Paula Mateo Fernández Caso

    2011-06-01

    Full Text Available Hacia fines del Mesozoico, en el sector noroeste de la provincia de Neuquén se desarrolló un magmatismo asociado a la evolución y migración del arco andino desde los 36º40' hasta los 38º20' de latitud sur. En base a estudios petrológicos, se caracterizaron facies hipabisales y extrusivas que afloran en el área de Pichaihue. Las primeras están compuestas por andesitas que se emplazan como lacolitos, diques o filones capa intruyendo las secuencias sedimentarias mesozoicas. También se reconocen afloramientos de basaltos. Las facies extrusivas están constituidas principalmente por coladas brechosas, coladas masivas y pequeños domos. La geoquímica evidencia una impronta calcoalcalina, de arco volcánico, con una corteza de espesor normal y patrones de elementos traza que sugieren una misma fuente. Dentro del marco regional, se pueden distinguir tres grupos: los diques del cerro Mocho con alto contenido en Ti y mayor relación Sm/Yb, magmatismo cretácico superior-paleoceno al que pertenecen las facies extrusivas (Andesita Rivera y un evento eoceno al cual corresponden las facies hipabisales (Diques de Colipilli. Por último, la presencia de estas rocas en este segmento de los Andes evidencia una importante migración hacia el este del arco volcánico cretácico superior-eoceno indicando su posición más oriental.Magmatism related to the growth and migration of the Andean arc was developed from the 36º40'S to the 38º20'S latitude, in the northwestern sector of the Neuquén Province, by the end of the Mesozoic. Hypabyssal and extrusive facies, which outcrop in the Pichaihue area, were described based on petrologic studies. The first ones are composed of andesites that are emplaced as lacoliths, dikes or sills intruding the Mesozoic sedimentary sequences. In addition, basalts outcrops were recognized. The extrusive facies consist of breccia or massive lavas and little domes. The geochemistry reveals an arc-like calc-alkaline signature

  7. Desenvolvimento relativo das partes do corpo de zebuínos de quatro raças Relative development of body portions from four zebu breeds

    Directory of Open Access Journals (Sweden)

    André Mendes Jorge

    2001-10-01

    Full Text Available Utilizaram-se 63 machos não-castrados, sendo 16 de cada, das raças Gir, Guzerá, e Mocho Tabapuã e 15 da raça Nelore, com média de idade 24 meses e média de pesos vivos iniciais de 376,4; 357,6, 362,0 e 368,6kg, respectivamente. Os animais de cada raça foram divididos, aleatoriamente, em cinco categorias. Uma categoria foi abatida imediatamente (AB, três receberam, em baias individuais, ração contendo 50% de concentrado na matéria seca "ad libitum" (I, II e III e uma recebeu a mesma ração, em quantidade restrita, suprindo níveis de proteína e energia 15% acima da mantença (AR. Os animais das categorias I, II e III foram abatidos ao atingirem pesos vivos individuais de 405, 450 e 500kg, respectivamente. No abate, determinou-se o peso de corpo vazio, e pesaram-se os órgãos e vísceras. Adotou-se a equação de regressão do logaritmo da quantidade corporal de órgãos e vísceras em função do logaritmo do peso do corpo vazio. Os componentes do trato gastrintestinal e os outros órgãos internos, excetuando-se o fígado e o baço, revelaram um menor ímpeto de crescimento em relação ao do peso corporal vazio.Sixty-three intact males, 16 Gyr, 16 Guzerat, 15 Nellore and 16 'Mocho Tabapuã', averaging, respectively, 376.4, 357.6, 362.0 and 368.6kg initial live weight and twenty-four months of age, were used. The animals from each breed were divided into five groups (categories. One group was ramdomly assigned to immediate slaughter (AB, three groups were full-fed a ration containing 50% concentrate, dry matter basis until reaching the slaughter weights of 405, 450 and 500kg, respectively (group I, II and III. The fifth group was fed a restricted amount of the same ration to supply levels of protein and energy 15% above maintenance (AR. Each AR animal was slaughtered when an animal correspondent to group II reached the slaughter weight. At slaughter, the empty body weight was determined and the weight of internal organs were

  8. Tamanho relativo dos órgãos internos de zebuínos sob alimentação restrita e Ad libitum Relative size of internal organs of zebu cattle under restricted and full fed feeding

    Directory of Open Access Journals (Sweden)

    André Mendes Jorge

    1999-04-01

    Full Text Available Os efeitos do nível nutricional e da raça sobre o tamanho relativo dos órgãos internos foram estudados. Sessenta e três machos não-castrados, sendo 16 da raça Gir, 16 Guzerá, 16 Mocho de Tabapuã e 15 da raça Nelore, com idade média de 24 meses e pesos vivos médios iniciais de 376,4; 357,6; 362,0; e 368,6 kg, respectivamente, foram usados. Os animais de cada raça foram divididos, aleatoriamente, em cinco categorias. Uma categoria foi abatida imediatamente (AB; três categorias receberam ad libitum ração contendo 50% de concentrado na matéria seca (categoria 1, 2 e 3, em baias individuais; e uma categoria recebeu a mesma ração, em quantidade restrita, suprindo níveis de proteína e energia 15% acima da mantença (AR. Os animais das categorias 1, 2 e 3 foram abatidos ao atingirem pesos vivos individuais de 405, 450 e 500 kg, respectivamente. No abate, o peso de corpo vazio (PCVZ foi determinado e os pesos dos órgãos internos e víscera foram registrados. Não houve diferenças entre raças nos pesos de fígado, baço, intestinos delgado e grosso, rúmen-retículo, omaso, estômagos e trato gastrintestinal (TGI, quando expressos em 100 kg de PCVZ. A restrição alimentar não influiu nos pesos do coração e dos pulmões, mas reduziu o peso do fígado e os componentes do TGI.The effects of genetic group and nutritional level on relative size of internal organs were studied. Sixty-three bulls, 16 Gyr, 16 Guzera, 15 Nellore and 16 Mocho de Tabapuã, averaging twenty four months of age, and initial live weight of 376.4, 357.6, 362.0, and 368.6 kg, respectively were used. The animals from each breed were randomly assigned to five groups. One group was immediately slaughtered (AB, three groups were full fed, in individual free stall, a diet containing 50% of concentrate on dry matter basis (group1, 2 and 3, and one group was fed with a restricted amount of the same diet to supply the levels of protein and energy 15% above maintenance

  9. Ecología trófica del jabalí europeo (Sus scrofa silvestre en Chile Trophic ecology of the wild boar (Sus scrofa in Chile

    Directory of Open Access Journals (Sweden)

    ÓSCAR SKEWES

    2007-09-01

    Full Text Available Documentamos la dieta del jabalí silvestre en el centro-sur de Chile basados en el examen de 20 estómagos colectados en los faldeos de volcán Mocho-Choshuenco (39°54' S, 72°02' O y en el Parque Nacional Vicente Pérez Rosales (41°03' S, 71°54' O. La dieta está representada por animales, vegetales y hongos. Entre los vegetales y hongos son consumidas tanto las partes epígeas como hipógeas, lo mismo que frutos y semillas. Hongos y rizomas de Gunnera tinctoria constituyen ítemes vegetales cuantitativamente importantes en la alimentación. El jabalí forrajea en general en ambiente boscoso, pero las especies vegetales más frecuentes en la dieta se encuentran en espacios abiertos o fuera del bosque. El ambiente dominado por Chusquea spp. constituye un importante sitio de alimentación. Los roedores de la familia Muridae dominan entre los animales determinados en la dieta del jabalí. Esta situación, sin embargo, parece obedecer a la ocurrencia de una ratada producto de la semillación masiva de Chusquea spp. durante la época de muestreo. Las aves de la familia Rhinocryptidae e invertebrados (en especial larvas del coleóptero Chiasognathus grantii constituyen parte frecuente de los ítemes animales de la dieta del jabalí. En comparación a estudios en otras partes del mundo, el jabalí silvestre en Chile consume hongos en porcentaje de ocurrencia similar (65 % a su dieta en Estados Unidos de América pero bastante más alta que su dieta en Europa (5-32 %. En relación al volumen del componente animal, el jabalí en Chile consume más (16,1 % que en Estados Unidos de América (6 % y que en Europa (7-13 %We document the diet of wild boar in south-central Chile based on analysis of 20 stomachs collected on the outskirts of Mocho-Choshuenco volcano (39°54' S, 72°02' W and of Vicente Pérez Rosales National Park (41°03' S, 71°54' W. The diet incorporates animals, plants and fungi. Among the latter two, both epigeal and hypogeal parts

  10. Southern Chile, trout and salmon country: invasion patterns and threats for native species Sur de Chile, país de truchas y salmones: patrones de invasión y amenazas para las especies nativas

    Directory of Open Access Journals (Sweden)

    DORIS SOTO

    2006-03-01

    perturbations represents a great challenge. We propose to enhance conservation by exerting a stronger sport fishing pressure on trout in those streamsPara evaluar la distribución y abundancia actual de salmónidos y peces nativos muestreamos 11 lagos grandes y 105 arroyos, cubriendo 13 cuencas principales en el sur de Chile desde 39° a 52°S. En general las truchas (Salmo trutta y Oncorhynchus mykiss representaron más de 60 % de la abundancia total de peces y más de 80 % de la biomasa total, además 40 % de los arroyos muestreados no presentaron peces nativos. Los salmones traídos para acuicultura tales como O. kisutch, Salmo salar, y O. tshawytscha solo estuvieron presentes en lagos que tenían salmonicultura, aun cuando no parecen reproducirse exitosamente en los arroyos afluentes. Pusimos a prueba el efecto del origen de los arroyos (cordillera de los Andes, valle central o cordillera de la Costa sobre la abundancia de las especies y encontramos que la trucha arco iris estuvo más restringida a los arroyos preandinos con mayor descarga, mientras la trucha café se distribuyó ampliamente no respondiendo a otras características o atributos específicos de las cuencas que se midieron. La abundancia relativa de peces nativos fue mayor en los lagos que en los arroyos, en tanto la mayor biodiversidad de peces nativos se encontró en arroyos del valle central. Las especies más comunes fueron Galaxias maculatus, G. platei, Brachygalaxias bullocki, Aplochiton zebra y Basilichthys australis. Arroyos con mayor conductividad, más áreas de pozones, más sedimentos finos y con bajas densidades de trucha café fueron más adecuados para peces nativos. Es así que cuencas con mayor disturbio antropogénico parecen ser refugio para los mismos. Dada la naturaleza descriptiva de nuestro estudio solo podemos presumir los efectos negativos de truchas y salmones sobre los peces nativos, efecto que debiera estar sobreimpuesto a los condicionantes biogeográficos de la distribuci

  11. Fish faunas from the Late Jurassic (Tithonian) Vaca Muerta Formation of Argentina: One of the most important Jurassic marine ichthyofaunas of Gondwana

    Science.gov (United States)

    Gouiric-Cavalli, Soledad; Cione, Alberto Luis

    2015-11-01

    The marine deposits of the Vaca Muerta Formation (Tithonian-Berriasian) houses one of the most diverse Late Jurassic ichthyofaunas of Gondwana. However, most of the specimens remain undescribed. Jurassic fishes have been recovered from several localities at Neuquén Province (i.e., Picún Leufú, Plaza Huincul, Cerro Lotena, Portada Las Lajas, Los Catutos, and Arroyo Covunco) but also from Mendoza Province (i.e., La Valenciana, Los Molles, and Arroyo del Cajón Grande). Presently, the fish fauna of Los Catutos, near Zapala city (Neuquén Province), has yielded the highest number of specimens, which are taxonomically and morphologically diverse. At Los Catutos locality, the Vaca Muerta Formation is represented by the Los Catutos Member, which is considered the only lithographic limestones known in the Southern Hemisphere. Here, we review the Tithonian fish faunas from the Vaca Muerta Formation. During Late Jurassic times, the actual Argentinian territory could have been a morphological diversification center, at least for some actinopterygian groups. The apparently lower species diversity recorded in marine Jurassic ichthyofaunas of Argentina (and some Gondwanan countries) in comparison with Chilean and European fish faunas could be related to the fish paleontological research history in Gondwana and the low number of detailed studies of most of specimens recorded.

  12. Creatividad e investigación en la publicidad dirigida al colectivo inmigrante: la senda de la integración / Creativity and research into multicultural advertising: way of integration

    Directory of Open Access Journals (Sweden)

    Rebeca Martín Nieto

    2009-11-01

    Full Text Available El consumo es un símbolo de integración porque se supone que cuando los nuevos residentes consumen se acercan al comportamiento de los nacionales. Por ello la publicidad sigue siendo una herramienta importante de inserción social a pesar de la crisis económica. Se hace un análisis detallado de las estrategias creativas y de la creatividad de los mensajes utilizados en las campañas dirigidas a nuevos residentes y se constata que se abusa de los estereotipos y que la mayoría de las campañas se concentran en tres sectores: comunicaciones, entidades financieras y alimentación y, en menor medida pero con un gran desarrollo en creatividad, en Codesarrollo tal y como se observa en el Festival Universitario de Publicidad Social Solidar&dar de la Universidad Rey Juan Carlos dirigido por Isidoro Arroyo.The consumption is a symbol to integrate inmigrants because inmigrants do the same things that natives. Advertisement continues been an important tool to integrate inmigrants. This article analices creative strategy and messages analysis in campaign manages to inmigrants. We consider that they exceeds of stereotypes. The most of the campaign are about communication, banks and food. They are about Co-development too as we could see in Social Universitary Advertisement Festival Solidar&dar in Rey Juan Carlos University whose chairman is Isidoro Arroyo.

  13. Continental sedimentary successions exposed in Centinela del Mar, Buenos Aires, Argentina (Lower Pleistocene - Holocene); Las sucesiones sedimentarias continentales expuestas en Centinela del Mar, provincia de Buenos Aires, Argentina (Pleistoceno Inferior-Holoceno)

    Energy Technology Data Exchange (ETDEWEB)

    Cenizo, M. M.

    2011-07-01

    In the present paper, the geomorphologic and sedimentary characteristics of the continental sequences exposed on the coastal cliffs and surrounding areas of the Centinela del Mar locality are described and interpreted. Fourteen lithofacies are defined, their relation, geometry and structure are represented using transversal and longitudinal detailed profiles. In the basal and medium sector of the profile, facies of different degrees of transport and aqueous rework were recognized. In the superior sector, a succession of marine peri-coastal facies corresponding to the Belgranense transgression (=Fm. Pascua) were identified, ending the sequence with relictual eolic facies. The different historical interpretations are discussed, homologating the units referred previously with the ones proposed on this paper. These units are correlated with those defined in the allostratigrapic scheme proposed by other authors for the area covered between Playa San Carlos and Arroyo Chapadmalal. This allowed recognize for the area under study the presence of the Punta San Andres and Arroyo Loberia Alloformations (basal-medium and superior sector, respectively). Between these two entities, a association of well defined progradant marine facies are found and named on this paper as Centinela del Mar Alloformation. Finally, periferithe information gathered here (magnetostratigraphy, radiometric dating, stratigraphic correlations, etc) indicates, at least preliminarily, that the sequence of Centinela del Mar corresponds to the Ensenadense- Lujanense interval (Lower Pleistocene - Holocene). (Author) 73 refs.

  14. Examination of type material of two species of Litomosoides (Filarioidea : Onchocercidae, parasites from bats ; taxonomic consequences

    Directory of Open Access Journals (Sweden)

    Bain O.

    2003-09-01

    Full Text Available Type material of Litomosoides hamletti Sandground, 1934 from Glossophaga soricina soricina in Brazil and L. penai Jiménez- Quirós & Arroyo, 1 960 from Carollia perspicillata azteca in Costa Rica, was examined. The morphology of the spicules shows that these species belong to the carinii group. Their synonymy with L. guiterasi Pérez Vigueras, 1934, from Artibeus jamaicensis yucatanicus in Cuba, does not appear justified because they are distinct in several characters (body length, width of female, size and shape of buccal cavity and capsule, shape of right spicule. L. hamletti is a valid species; L. penai is closely related to it and is considered to be a sub-species, L. hamletti penai Jiménez-Quirós & Arroyo, 1960: The material recovered from Glossophaga spp., previously assigned to L guiterasi by several authors, is identified as L. h. hamletti. L. guiterasi appears to be closely related to L chandleri Esslinger, 1973; L. chitwoodi n. sp. (= Litomosoides sp. Chitwood, 1938 seems close to these species; all three are parasites of Artibeus spp.

  15. Population Dynamics of an Insect Herbivore over 32 Years are Driven by Precipitation and Host-Plant Effects: Testing Model Predictions.

    Science.gov (United States)

    Price, Peter W; Hunter, Mark D

    2015-06-01

    The interaction between the arroyo willow, Salix lasiolepis Bentham, and its specialist herbivore, the arroyo willow stem-galling sawfly, Euura lasiolepis Smith (Hymenoptera: Tenthredinidae), was studied for 32 yr in Flagstaff, AZ, emphasizing a mechanistic understanding of insect population dynamics. Long-term weather records were evaluated to provide a climatic context for this study. Previously, predictive models of sawfly dynamics were developed from estimates of sawfly gall density made between 1981 and 2002; one model each for drier and wetter sites. Predictor variables in these models included winter precipitation and the Palmer Drought Severity Index, which impact the willow growth, with strong bottom-up effects on sawflies. We now evaluate original model predictions of sawfly population dynamics using new data (from 2003-2012). Additionally, willow resources were evaluated in 1986 and in 2012, using as criteria clone area, shoot density, and shoot length. The dry site model accounted for 40% of gall population density variation between 2003 and 2012 (69% over the 32 yr), providing strong support for the bottom-up, mechanistic hypothesis that water supply to willow hosts impacts sawfly populations. The current drying trend stressed willow clones: in drier sites, willow resources declined and gall density decreased by 98%. The wet site model accounted for 23% of variation in gall population density between 2003 and 2012 (48% over 30 yr), consistent with less water limitation. Nonetheless, gall populations were reduced by 72%. PMID:26313951

  16. Assessment of gully-control structures in the Rio Nutria watershed, Zuni reservation, New Mexico

    Science.gov (United States)

    Gellis, Allen C.; Cheama, Andres; Laahty, Vanissa; Lalio, Sheldon

    1995-01-01

    During the latter part of the 19th century and the early part of the 20th century, a major cycle of erosion, arroyo cutting, and gullying occurred in the southwestern United States. Since this erosion cycle began, many projects to control erosion, such as the Civilian Conservation Corps projects in the 1930s, were initiated. However, in the Southwestern United States few studies have documented the effect of these structures in reducing erosion or their effect on gully systems. As part of a watershed rehabilitation project on the Zuni Reservation, New Mexico, 47 structures made either of earth or rocks and 23 rock and brush structures were assessed. Sixty percent of the 47 earth or rock structures have breached and relative to dam height, 65 percent of 47 structures are more than 50 percent silted. Of the 23 rock and brush structures, 22 percent have breached or are close to breaching. Reasons for breaching of all structural types may be piping, scour immediately below the structures, large runoff and large drainage area, poor maintenance, headcutting, and active arroyo deepening and widening. In most cases, documentation does not exist on structure design, the specific purpose for a structure, or when these structures were built.

  17. Obliquity dependence of the tangential YORP

    CERN Document Server

    Ševeček, P; Scheeres, D J; Krugly, Yu N

    2016-01-01

    Context. Tangential YORP is a thermophysical effect that can alter the rotation rate of asteroids and is distinct from the "normal" YORP effect, but to date has only been studied for asteroids with zero obliquity. Aims. The tangential YORP force produced by spherical boulders on the surface of an asteroid with an arbitrary obliquity is studied. Methods. A finite element method is used to simulate heat conductivity inside a boulder, to find the recoil force experienced by it. Then an ellipsoidal asteroid uniformly covered by such boulders is considered and the torque is numerically integrated over its surface. Results. Tangential YORP is found to operate on non-zero obliquities and decreases by a factor of 2 for increasing obliquity.

  18. METER-SIZED MOONLET POPULATION IN SATURN'S C RING AND CASSINI DIVISION

    Energy Technology Data Exchange (ETDEWEB)

    Baillie, Kevin; Colwell, Joshua E. [Department of Physics, University of Central Florida, Orlando, FL 32816-2385 (United States); Esposito, Larry W. [Laboratory for Atmospheric and Space Physics, University of Colorado at Boulder, 392 UCB, Boulder, CO 80309-0392 (United States); Lewis, Mark C., E-mail: kevin.baillie@cea.fr [Department of Computer Science, Trinity University, One Trinity Place, San Antonio, TX 78212-7200 (United States)

    2013-06-01

    Stellar occultations observed by the Cassini Ultraviolet Imaging Spectrograph reveal the presence of transparent holes a few meters to a few tens of meters in radial extent in otherwise optically thick regions of the C ring and the Cassini Division. We attribute the holes to gravitational disturbances generated by a population of {approx}10 m boulders in the rings that is intermediate in size between the background ring particle size distribution and the previously observed {approx}100 m propeller moonlets in the A ring. The size distribution of these boulders is described by a shallower power-law than the one that describes the ring particle size distribution. The number and size distribution of these boulders could be explained by limited accretion processes deep within Saturn's Roche zone.

  19. Catastrophic-flood Features in Swedish Lapland as a Terrestrial Analog for Martian Channel Flows

    Science.gov (United States)

    Rossbacher, L. A.; Rhodes, D. D.

    1985-01-01

    Catastrophic flooding associated with deglaciation created unusual landscapes in several areas of northern Sweden. These areas in Swedish Lapland are distinguished by the large grain-size material that forms them. The presence of boulders at both Viking landing sites suggests the relevance of this analog. The Baldakatj area of Swedish Lapland offers terrestrial analogs for erosional remnants on Mars. Although the Baldakatj features are an order of magnitude or more smaller than the Martian forms, they created in boulder-rich till that may be a good approximation of the near-surface material on Mars. The Baldakatj area also includes other landforms that could reasonably be expected to occur with the Martian outflow channels, including boulder deltas, large transported blocks, and large-scale bedforms.

  20. Petrografía y geoquímica del magmatIsmo cretácico superior-eoceno en el área de PichaIhue, provincia de Neuquén

    Directory of Open Access Journals (Sweden)

    M. Paula Mateo Fernández Caso

    2011-06-01

    Full Text Available Hacia fines del Mesozoico, en el sector noroeste de la provincia de Neuquén se desarrolló un magmatismo asociado a la evolución y migración del arco andino desde los 36º40' hasta los 38º20' de latitud sur. En base a estudios petrológicos, se caracterizaron facies hipabisales y extrusivas que afloran en el área de Pichaihue. Las primeras están compuestas por andesitas que se emplazan como lacolitos, diques o filones capa intruyendo las secuencias sedimentarias mesozoicas. También se reconocen afloramientos de basaltos. Las facies extrusivas están constituidas principalmente por coladas brechosas, coladas masivas y pequeños domos. La geoquímica evidencia una impronta calcoalcalina, de arco volcánico, con una corteza de espesor normal y patrones de elementos traza que sugieren una misma fuente. Dentro del marco regional, se pueden distinguir tres grupos: los diques del cerro Mocho con alto contenido en Ti y mayor relación Sm/Yb, magmatismo cretácico superior-paleoceno al que pertenecen las facies extrusivas (Andesita Rivera y un evento eoceno al cual corresponden las facies hipabisales (Diques de Colipilli. Por último, la presencia de estas rocas en este segmento de los Andes evidencia una importante migración hacia el este del arco volcánico cretácico superior-eoceno indicando su posición más oriental.

  1. Ergonomia e o cirurgião-dentista: uma avaliação do atendimento clínico usando análise de filmagem = Ergonomics and the dentist: an evaluation of clinical practice by filming analysis

    Directory of Open Access Journals (Sweden)

    Garbin, Artênio José Isper

    2008-01-01

    Full Text Available Objetivo: Analisar os princípios de ergonomia durante atendimento odontológico realizado por cirurgião-dentista e auxiliar, com o uso de análise de imagens digitais capturadas por filmagem. Metodologia: Foram estudadas sessenta sessões clínicas de atendimento odontológico. A filmagem do atendimento clínico foi realizada com quatro câmeras profissionais CCO Color Keep HDL com lente íris fixa. Utilizou-se uma placa de captura para quatro canais (Pico 2000 de transmissão digital geovision para capturar as imagens e transmiti-las ao computador. Resultados: Na análise das filmagens os atendimentos duraram em média 1h 30min. O profissional não colocou em prática os princípios de ergonomia, sendo observados principalmente: torção da coluna vertebral para alcançar os instrumentais na posição de 7h ao trabalhar em 9h, auxiliar trabalhando com as pernas cruzadas; não-utilização da mesa auxiliar; levantamento dos ombros do operador, não deixando a linha do antebraço paralela ao chão; e inadequada acomodação do operador sentado no mocho. Conclusão: Os profissionais não seguiram os princípios básicos de ergonomia durante o trabalho. O recurso de filmar os atendimentos para análise dos procedimentos pode possibilitar que os profissionais realizem seu trabalho de forma planejada e estratégica para atingir suas metas sem prejuízo da saúde

  2. Hydrate Model for CCS Relevant Gases Compatible with Highly Accurate Equations of State- II. Results and Implementation in TREND 2.0

    Czech Academy of Sciences Publication Activity Database

    Jäger, A.; Vinš, Václav; Span, R.; Hrubý, Jan

    Boulder Colorado: National Institute of Standards and Technology, 2015. PaperID 2658. [Symposium on Thermophysical Properties /19./. 21.06.2015-26.06.2015, Boulder Colorado] R&D Projects: GA MŠk(CZ) 7F14466 Grant ostatní: Rada Programu interní podpory projektů mezinárodní spolupráce AV ČR(CZ) M100761201 Institutional support: RVO:61388998 Keywords : gas hydrates * carbon capture and storage * model ling Subject RIV: BJ - Thermodynamics http://thermosymposium.nist.gov/pdf/Abstract_2658.pdf ; http://thermosymposium.nist.gov/program.html

  3. Hydrate Model for CCS Relevant Gases Compatible with Highly Accurate Equations of State I. Parameter Study and Model Fitting

    Czech Academy of Sciences Publication Activity Database

    Vinš, Václav; Jäger, A.; Hrubý, Jan; Span, R.

    Boulder Colorado: National Institute of Standards and Technology, 2015. PaperID 2868. [Symposium on Thermophysical Properties /19./. 21.06.2015-26.06.2015, Boulder Colorado] R&D Projects: GA MŠk(CZ) 7F14466 Grant ostatní: Rada Programu interní podpory projektů mezinárodní spolupráce AV ČR(CZ) M100761201 Institutional support: RVO:61388998 Keywords : gas hydrates * carbon capture and storage * modelling Subject RIV: BJ - Thermodynamics http://thermosymposium.nist.gov/pdf/Abstract_2868.pdf ; http://thermosymposium.nist.gov/program.html

  4. Ice transport directions and distances as a tool for ore exploration in glaciated regions - a compilation in Sweden

    Science.gov (United States)

    Sohlenius, G. S.; Ladenberger, A.:L.; Lax, K. L.

    2009-04-01

    The complex information from SGU database has been used to evaluate ice transport directions and distances in Sweden. Till geochemistry, boulder counting and glacial striae have been applied to detect source rocks and mineralization in various regions of the country. The preliminary ice transport distances have been estimated in one region in middle Sweden (Bergslagen) and in two regions in northern Sweden (Västerbotten and Norbotten). Boulder dispersal trains have been recognized, classified based on lithology and morphology after which the maximum ice transport distance has been evaluated. In most areas the transport is short, up to 2-3 km. In Bergslagen, Cu-Zn and W mineralization can be traced in boulders from c. 300 m to c. 7 km. In Västerbotten, the transport distances range from 400 m to 3 km for sulphide mineralization. In Norbotten, a majority of known Ni mineralization can be detected in boulders located between 0.5 and 3 km. The source bedrock can be found based on outcrop record, ice direction indicators, presence of geophysical anomalies and glacial morphological landforms. The morphological information may, however, provide contradicting information when compared with independent ice direction indicators such as striae on the bedrock. During the latest glaciation an ice divide existed in northern Sweden which complicates the detection of source rocks. Till geochemistry provides information about local and regional anomalies, however quality of information depends on the methodology (e.g. sampling density) and the grid used, which sometimes is larger then the largest boulder train observed in the studied area. On the other hand, application of boulder trains can be difficult in areas with long transport distances. While boulder trains provide exact information about the mineralization, the till geochemistry carries uncertainty about exact ore type. Geochemical anomalies can be both very local or widely spread out, e.g. in southwestern Sweden

  5. Time needed for first lichen colonization of terminal moraines in the Tröllaskagi peninsula (North Iceland)

    Science.gov (United States)

    Andres, Nuria; Palacios, David; Brynjólfsson, Skafti; Sæmundsson, Þorsteinn

    2015-04-01

    The Tröllaskagi peninsula is located in Central North Iceland. The peninsula belong to the Tertiary basaltic areas in Iceland and is characterised by numerous glacially eroded valleys and fjords. The altitude ranges from sea level to 1500 m. Around 150 glaciers, debris covered glaciers and clean glaciers exist in the cirques of the Tröllaskagi peninsula. Lichenometric techniques were applied to date moraines formed by some of these glaciers, especially from 1970-90, establishing growth rates for some species, e.g. 0.5 mm/year for Rizocarpon geographicum. However there is no information available on how long the lichens take to colonize the boulders in a moraine once it has become detached from the retreating glacier. The aim of this paper is to observe how long it takes for the boulders on the moraines to be colonized by lichens in the Tröllaskagi peninsula, where the separation date of a moraine from the retreating glacier tongue is known. Two case studies were used. The first was the surging glacier Búrfellsjökull, in the Búrfelllsdalur valley, an affluent of the Svarfaðardalur valley. The Búrfellsjökull glacier surged in 2001-2004 and the glacial terminus advanced 150-240 m, overrunnig a moraine formed around 1955 and formed a new moraine. About 2-3 years after the surge termination in 2004 the glacial terminus was already retreating and had left the moraine isolated (Brynjólfsson et al. 2012). The other case is the Gljúlfurárjökull glacier, in the Gljúlfurárdalur valley, an affluent of the Skíðadalur valley. It can be seen from the series of aerial photographs that the glacier terminus advanced during the 1990s until the year 2000. In 2004 the glacial terminus was already retreating and had separated from a small moraine formed during the previous advance. Thus, two different glaciers halted and formed one moraine each which they separated from almost similar time. During the detailed field work carried out in August 2014 on both moraines

  6. Multi-annual climate in Parque Nacional Pan de Azúcar, Atacama Desert, Chile Clima multianual en el Parque Nacional Pan de Azúcar, Desierto de Atacama, Chile

    Directory of Open Access Journals (Sweden)

    MATTHEW V. THOMPSON

    2003-06-01

    Full Text Available The lomas formations of the Peruvian and Atacama deserts are characterized by both climatic and floristic spatial heterogeneity, as well as non-contiguous pockets of relatively distinct flora. We examined two distinct types of communities in Parque Nacional Pan de Azúcar in Chile, the low-elevation arroyo and bajada community, and the high-elevation fog-zone community. We determined the distribution with elevation of the dominant perennial plant species in a single arroyo community, as well as the distribution of associated climatic characteristics. Climatic conditions (including air temperature, relative humidity, and wind speed and direction were recorded from June, 1999, to March, 2001, for the arroyo, as well as for a medium-elevation inland site with little vegetation, and a high-elevation fog-zone site with copious vegetation. The fog layer, or camanchaca, derived from the marine inversion layer ubiquitous to the Peruvian and Atacama deserts was found to be more persistent, though weaker, during the summer months and somewhat more condensed and shallower in the winter months, with uncharacteristically dry air and high temperatures occurring at and above 400 m elevation during the late fall and early winter of 2000. The reduction or increase in the maximum elevation of the camanchaca or a change in the rainfall regime of the park may have broad implications for the distribution or even presence of certain species in Parque Nacional Pan de Azúcar. Vegetation patterns appear to be strongly dependent on inversion layer development, and perhaps on its subsidence during the winter. A number of species prevalent at low-elevation sites may have little advantage at a high-elevation foggy site, whereas the consistently high humidity at low elevations would be a boon to any desert plant accustomed to low precipitation. If we are to successfully assess the effects of changes in southern Pacific weather patterns, it will become necessary to more

  7. Guiding Design: Exposing Librarian and Student Mental Models of Research Guides

    Science.gov (United States)

    Sinkinson, Caroline; Alexander, Stephanie; Hicks, Alison; Kahn, Meredith

    2012-01-01

    This article details an open card sort study administered to undergraduate students, graduate students, and librarians at the University of Colorado at Boulder in order to reveal perceptions of library research guides. The study identifies user group preferences for organization and content of research guides, as well as themes emerging from the…

  8. Gender Disparities in Second-Semester College Physics: The Incremental Effects of a "Smog of Bias"

    Science.gov (United States)

    Kost-Smith, Lauren E.; Pollock, Steven J.; Finkelstein, Noah D.

    2010-01-01

    Our previous research [Kost et al., Phys. Rev. ST Phys. Educ. Res. 5, 010101 (2009)] examined gender differences in the first-semester, introductory physics class at the University of Colorado at Boulder. We found that: (1) there were gender differences in several aspects of the course, including conceptual survey performance, (2) these…

  9. Multigrid Method for Polarized Radiative Transfer

    Czech Academy of Sciences Publication Activity Database

    Štěpán, Jiří

    San Francisco: Astronomical Society of the Pacific, 2006 - (Casini, R.; Lites, B.), s. 148-154. (ASP Conference Series. 358). ISBN 978-1-58381-292-1. [Solar Polarization Workshop /4./. Boulder (US), 19.09.2005-23.09.2005] Institutional research plan: CEZ:AV0Z10030501 Keywords : polarization * radiative transfer * sun Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

  10. Geochemical characteristics of basement target rocks, suevitic glasses from the Eyreville B drill core, Chesapeake Bay impact structure, and three bediasites

    Czech Academy of Sciences Publication Activity Database

    Skála, Roman; Langenhorst, F.; Deutsch, A.

    Boulder: Geological Society of America, 2009, s. 435-445. (Special papers of the Geological Society of America). ISBN 978-0-8137-2458-4 Institutional research plan: CEZ:AV0Z30130516 Keywords : Chesapeake Bay impact crater * Eyreville B core hole * impact glasses * bediasites * tektites * geochemistry Subject RIV: DD - Geochemistry

  11. Mass Wasting on the Moon: Implications for Seismicity

    Science.gov (United States)

    Nahm, A. L.; Weber, R. C.; Yanites, B.; Schmerr, N.

    2016-01-01

    Introduction: Seismicity estimates play an important role in creating regional geological characterizations, which are useful for understanding a planet's formation and evolution, and of key importance to site selection for landed missions. Here we investigate the regional effects of lunar seismicity with the goal of determining whether surface features such as landslides and boulder trails on the Moon are triggered by fault motion.

  12. Adventure Recreation: Coming Soon to Your Community

    Science.gov (United States)

    Moorman, Marta; Schlatter, Barbara E.; Hurd, Amy R.

    2007-01-01

    Adventure recreation activities like mountain biking, bouldering, and kayaking used to require considerable travel to unique locations. This is changing, however, as the new trend emerges in the United State of providing adventure recreation experiences in cities and towns, such as New York City and Golden, Colorado. This article highlights…

  13. Yet Another Fish Tale?

    Science.gov (United States)

    Lalasz, Robert

    2008-01-01

    Last month the "Rocky Mountain News" reported that a survey by an emeritus professor at University of Colorado Boulder found that only 23 of 825 faculty members on the campus were registered Republicans. But on his "New York Times" blog, Stanley Fish brushed off the survey's significance from a familiarly Fishian stance. A faculty's political…

  14. The Three-Continent, 24-Hour Help Desk: An Academic First?

    Science.gov (United States)

    Sykes, Jean

    2002-01-01

    Describes Follow the Sun, a computer help-desk service that takes advantage of time differences around the world to permit four universities (University of Colorado Boulder, Australia's Macquarie and Newcastle universities, and the London School of Economics) to share services and provide 24-hour support to users. (EV)

  15. 给我的词句评分……

    Institute of Scientific and Technical Information of China (English)

    杨海民

    1998-01-01

    A computer program that analyses word usage can do just as good a job of gradingessays as an experienced human marker. "l’m not ready to claim it’s fooproof, but Iam ready to claim that it’s approximtely as foolproof as a human," says Thomashandauer, a cognitive scientist at the University of Colorado at Boulder, who led the

  16. Estimation du risque collisionnel entre une sonde spatiale cométaire et un fragment du noyau

    Science.gov (United States)

    Desvoivres, Emmanuel; Klinger, Jürgen; Levasseur-Regourd, Anny-Chantal

    2000-03-01

    Several comets will be approached by space probes during the two next decades. The presence of a fragment of the nucleus in the coma is a real danger. We have estimated the probability of presence of a boulder in the inner coma, using a model for the dynamics of fragments. Specific recommandations are deduced in order to reduce the risk of a collision.

  17. Lunar Roving Vehicle parked in lunar depression on slope of Stone Mountain

    Science.gov (United States)

    1972-01-01

    The Lunar Roving Vehicle appears to be parked in a deep lunar depression on the slope of Stone Mountain in this photograph of the lunar scene at Station no. 4, taken during the second Apollo 16 extravehicular activity (EVA-2) at the Descartes landing site. A sample collection bag is in the right foreground. Note field of small boulders at upper right.

  18. EFFECT OF SECONDARY EFFLUENTS ON EUTROPHICATION IN LAS VEGAS BAY, LAKE MEAD, NEVADA

    Science.gov (United States)

    The eutrophication potential of Lake Mead, with primary emphasis on Las Vegas Bay, was determined with Selenastrum capricornutum. Nutrient limitation profiles were determined for three sampling stations in Las Vegas Bay and one in Boulder Basin. After heavy metals were chelated w...

  19. Geo(Im)pulse: An investigation into the genesis of an erratic (retro) eclogite block from Haren, Groningen, the Netherlands

    NARCIS (Netherlands)

    Langendoen, J.; Roermund, H.L.M. van

    2007-01-01

    In boulder clays and glacial deposit sands, exposed in the northern part of the Netherlands, erratic blocks of (ultra)high pressure (UHP)metamorphic rocks may be found that originate from the Baltic Shield (Scandinavia). The occurrence of (U)HP metamorphic rocks in Scandinaviais limited to: (1) isol

  20. The Lodin Elv Formation; a Plio-Pleistocene occurrence in Greenland

    DEFF Research Database (Denmark)

    Feyling-Hanssen, Rolf W.; Funder, Svend Visby; Petersen, Kaj Strand

    1983-01-01

    Greenland, is described and minted the Lodin El\\' Formation. The sedimentary sequence consists of sorted sand and silt ovcrlain by diamicton containing erratic boulders. Both units contain ill siw molluscs and foraminiferal assemblages. The sediments occur as an erosional remnant of local...

  1. 10 CFR 904.10 - Excess energy.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Excess energy. 904.10 Section 904.10 Energy DEPARTMENT OF ENERGY GENERAL REGULATIONS FOR THE CHARGES FOR THE SALE OF POWER FROM THE BOULDER CANYON PROJECT Power Marketing § 904.10 Excess energy. (a) If excess Energy is determined by the United States to be...

  2. 10 CFR 904.11 - Lay off of energy.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Lay off of energy. 904.11 Section 904.11 Energy DEPARTMENT OF ENERGY GENERAL REGULATIONS FOR THE CHARGES FOR THE SALE OF POWER FROM THE BOULDER CANYON PROJECT Power Marketing § 904.11 Lay off of energy. (a) If any Contractor determines that it is...

  3. 2014 CESM Tutorial

    Energy Technology Data Exchange (ETDEWEB)

    Holland, Marika

    2014-08-11

    The 2014 annual tutorial for the Community Earth System Model (CESM) was held on August 11-August 15, 2014 at the National Center for Atmospheric Research in Boulder, CO. It included lectures and practical sessions on numerous aspects of the CESM model. The proceedings submitted here include a description of the tutorial.

  4. Holocene glacial history of the west Greenland Ice Sheet inferred from cosmogenic exposure ages and threshold lakes

    DEFF Research Database (Denmark)

    Larsen, Nicolaj Krog; Kjaer, K. H.; Colding, Sune Oluf;

    2011-01-01

    . Boulder samples from the highest peaks demonstrate that the ice was warm-based whereas bedrock samples often contain an inherited signal. These results may have implications for other studies in Greenland, which have inferred thin LGM ice based on 10Be ages of bedrock samples. The threshold lakes are used...

  5. Facies characteristics of the basal part of the Talchir Formation, Talchir Basin, India – depositional history revisited

    Indian Academy of Sciences (India)

    Prabir Dasgupta; Rishiraj Sahoo

    2007-02-01

    The lowest unit of the Talchir Formation of Talchir Basin, Orissa, was described by pioneer workers as the 'basal oulder bed'. In an attempt to explain the co-existence of gravel and clay, materials of contrasting hydraulic properties, a probable situation resembling the effects of the action of ground-ice enabled boulders to be carried down by sluggish currents resulting in an intermixture of large boulders and fine mud was conceived. Misinterpretation of this conclusion led to a general tendency to describe the 'basal boulder bed' as 'glacial tillite'. However, the unit described as 'basal boulder bed is actually represented by a matrix rich conglomerate with pockets of normally graded silty clay. The present study reveals that the depositional imprints preserved in this part of the sedimentary succession indicate emplacement of successive debris flows generated through remobilization of pre-existing unconsolidated sediments. Small pockets of fine-grained turbidites presumably deposited from the entrained turbidity currents associated with the debris flows suggest the composite character of the debris flow deposit.

  6. 15 CFR 265.41 - Gambling.

    Science.gov (United States)

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Gambling. 265.41 Section 265.41..., GAITHERSBURG, MARYLAND, AND BOULDER AND FORT COLLINS, COLORADO Buildings and Grounds § 265.41 Gambling. No... gambling devices, the conduct of lotteries or pools, or in the selling or purchasing of numbers tickets,...

  7. Chicxulub impact ejecta deposits in southern Quintana Roo, Mexico, and central Belize

    Czech Academy of Sciences Publication Activity Database

    Pope, K. O.; Ocampo, A.; Fischer, A. G.; Vega, F. J.; Ames, D. E.; King, D. T. Jr.; Fouke, B. W.; Wachtman, R. J.; Kletetschka, Günther

    Colo: Geological Society of America; Boulder, 2005 - (Kenkmann, T.; Horz, F.; Deutsch, A.), s. 171-190. (Special Paper - Geological Society of America. 384). ISBN 0-8137-2384-1 Institutional research plan: CEZ:AV0Z30130516 Keywords : Chicxulubu crater * impact ejecta * Mexico * Belize Subject RIV: BM - Solid Matter Physics ; Magnetism

  8. Using Participatory and Service Design to Identify Emerging Needs and Perceptions of Library Services among Science and Engineering Researchers Based at a Satellite Campus

    Science.gov (United States)

    Johnson, Andrew; Kuglitsch, Rebecca; Bresnahan, Megan

    2015-01-01

    This study used participatory and service design methods to identify emerging research needs and existing perceptions of library services among science and engineering faculty, post-graduate, and graduate student researchers based at a satellite campus at the University of Colorado Boulder. These methods, and the results of the study, allowed us…

  9. More Diamagnetism Demonstrations

    Science.gov (United States)

    Conery, Chris; Goodrich, L. F.; Stauffer, T. C.

    2003-02-01

    Inspired by, among others, Charles Sawicki's description of an inexpensive diamagnetic levitation apparatus, we built two such devices for classroom use and for educational outreach at the National Institute of Standards and Technology, Boulder, Colo. With a slightly different setup, the same demonstration can be done horizontally on an overhead projector.

  10. 78 FR 28838 - Hamilton Street Hydro, LLC; Notice of Preliminary Permit Application Accepted for Filing and...

    Science.gov (United States)

    2013-05-16

    ... Energy Regulatory Commission Hamilton Street Hydro, LLC; Notice of Preliminary Permit Application..., 2013, Hamilton Street Hydro, LLC, filed an application for a preliminary permit, pursuant to section 4... Boumansour, Hamilton Street Hydro, LLC, 1401 Walnut Street, Suite 301, Boulder, CO 80302; phone: (303)...

  11. The Art of Playground Design.

    Science.gov (United States)

    Hammatt, Heather

    2002-01-01

    Makes the case for integrating artistic expression into park and playground landscape design to create recreational areas with a more holistic look. The Foothills Community Park in Boulder, Colorado, is used to illustrate the use of artistic expression that preserves and celebrates the natural elements while creating a sense of community identity…

  12. 10 CFR 904.6 - Charge for capacity and firm energy.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Charge for capacity and firm energy. 904.6 Section 904.6 Energy DEPARTMENT OF ENERGY GENERAL REGULATIONS FOR THE CHARGES FOR THE SALE OF POWER FROM THE BOULDER CANYON PROJECT Power Marketing § 904.6 Charge for capacity and firm energy. The charge for Capacity...

  13. Proposal 1114.11.2956B

    Energy Technology Data Exchange (ETDEWEB)

    Degrand, Thomas [Univ. of Colorado, Boulder, CO (United States)

    2016-08-17

    The Theoretical Advanced Study Institute was held at the University of Colorado, Boulder, during June 1 - 26, 2015. The topic was "New Frontiers in Fields and Strings." The organizers were Professors Joseph Polchinski (KITP Santa Barbara) and Pedro Vieira (Perimeter Institute). Sixty one students heard sixty two lectures by sixteen lecturers. A Proceedings is in press.

  14. Calibrating several key lunar stratigraphic units representing 4 b.y of lunar history within Schrödinger basin

    Czech Academy of Sciences Publication Activity Database

    O'Sullivan, K.; Kohout, Tomáš; Thaisen, K. G.; Kring, D. A.

    Boulder : Geological Society of America , 2011 - (Ambrose, W. A.; Williams, D. A.), s. 117-127 ISBN 978-0-8137-2477-5. - (Special Paper of the Geological Society of America . 477) Institutional research plan: CEZ:AV0Z30130516 Keywords : basin * impact structure * lithology * lunar crust * mare basalt * Moon * pyroclastic deposit * stratigraphy * upper mantle Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

  15. First results of geothermal investigations, Chesapeake Bay impact structure, Eyreville core holes

    Czech Academy of Sciences Publication Activity Database

    Heidinger, P.; Wilhelm, H.; Popov, Y.; Šafanda, Jan; Burkhardt, H.; Mayr, S.

    Boulder : The Geological Society of America , 2009 - (Gohn, G.), s. 931-940 ISBN 978-0-8137-2458-4. - (Special paper. 458) R&D Projects: GA MŠk LA08036 Institutional research plan: CEZ:AV0Z30120515 Keywords : Chesapeake Bay * impact structure * deep borehole * temperature log * geothermal model Subject RIV: DC - Siesmology, Volcanology, Earth Structure

  16. Crete and the Minoan Terranes: Age constraints from U-Pb dating of detrital zircons

    Czech Academy of Sciences Publication Activity Database

    Zulauf, G.; Romano, S. S.; Dörr, W.; Fiala, Jiří

    Colorado : Boulder, 2007 - (Linnemann, U.), s. 401-411 ISBN 978-0-8137-2423-2. - (Special papers- Geological Society of America . 423) Institutional research plan: CEZ:AV0Z30130516 Keywords : Crete * Minoan terranes * peri-Gondwanan terranes * U-Pb-TIMS * Gondwana * detrital zircons Subject RIV: DB - Geology ; Mineralogy

  17. Structural evolution of the Prague synform (Czech Republic) during Silurian times: An AMS, rock magnetism, and palomagnetic study of the Svatý Jan pod Skalou dikes. Consequences for the nappes emplacement

    Czech Academy of Sciences Publication Activity Database

    Aifa, T.; Pruner, Petr; Chadima, Martin; Štorch, Petr

    Colorado : Boulder, 2007 - (Linnemann, U.), s. 249-265 ISBN 978-0-8137-2423-2. - (Special papers- Geological Society of America . 423) R&D Projects: GA AV ČR IAA3013406 Institutional research plan: CEZ:AV0Z30130516 Keywords : magnetic properies * dikes * Variscan orogen * stress * rheic * AMS * magnetization * Variscan orogen Subject RIV: DB - Geology ; Mineralogy

  18. Colo. Regents Reject Promotion of Erotic-Literature Scholar.

    Science.gov (United States)

    Wilson, Robin

    1994-01-01

    The Board of Governors of the University of Colorado at Boulder has turned down the promotion of an associate professor of English who specializes in study of erotic literature and obscenity. Critics call the ruling a breech of both academic freedom and faculty governance. (MSE)

  19. Combining Wind Plant Control With Systems Engineering (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Fleming, P.; Ning, A.; Gebraad, P.; Dykes, K.

    2015-02-01

    This presentation was given at the third Wind Energy Systems Engineering Workshop in Boulder, Colorado, and focused on wind plant controls research, combined optimization, a case study on the Princess Amalia Wind Park, results from the case study, and future work.

  20. GeoScape: An Instructional Rock Garden for Inquiry-Based Cooperative Learning Exercises in Introductory Geology Courses.

    Science.gov (United States)

    Calderone, Gary J.; Thompson, J. Robert; Johnson, Wayne M.; Kadel, Steve D.; Nelson, Pamela J.; Hall-Wallace, Michelle; Butler, Robert F.

    2003-01-01

    GeoScape is a landscape design consisting of colored gravel, strategically placed flagstone and boulders, and two vertical features that simulate the geology of fictitious regions. Employs "hands-on", inquiry-based, and cooperative learning techniques to help students develop problem solving and critical thinking skills. Explains the construction,…