These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
1

Tratamiento pasivo de aguas de mina con altas  

E-print Network

Tratamiento pasivo de aguas de mina con altas concentraciones de metales Resultados de ensayos en · Metodología · Resultados · Trabajos pendientes #12;Introducción Problemática de las aguas ácidas de mina 2.5 H2O Faja Pirítica Ibérica: · Mayor reserva de pirita del mundo · Aguas ácidas de mina con

Politècnica de Catalunya, Universitat

2

Estatura baja y estatura alta  

Microsoft Academic Search

ExtractoFundamentalmente la estatura baja o la estatura alta es una variacin normal en la talla. Forma parte del continuo de la curva de distribucin gausiana normal, que define los lmites inferior y superior de la normalidad como los percentiles 3 y 97. Dentro de este contexto, es muy importante diferenciar las variaciones normales en la talla y el crecimiento por

Jurgen H. Bramswig

2007-01-01

3

77 FR 29633 - Alta Wind VII, LLC, Alta Wind IX, LLC, Alta Wind X, LLC, Alta Wind XI, LLC, Alta Wind XII, LLC...  

Federal Register 2010, 2011, 2012, 2013

...LLC, Alta Wind IX, LLC, Alta Wind X, LLC, Alta Wind XI, LLC, Alta Wind...LLC, Alta Wind IX, LLC, Alta Wind X, LLC, Alta Wind XI, LLC, Alta Wind...capacity of Petitioners' wind and solar generation projects to the integrated...

2012-05-18

4

Solar Innovator | Alta Devices  

SciTech Connect

Selected to participate in the Energy Department's SunShot Initiative, Alta Devices produces solar cells that convert sunlight into electricity at world record-breaking levels of efficiency. Through its innovative solar technology Alta is helping bring down the cost of solar. Learn more about the Energy Department's efforts to advance solar technology at energy.gov/solar .

Mattos, Laila; Le, Minh

2012-01-01

5

Solar Innovator | Alta Devices  

ScienceCinema

Selected to participate in the Energy Department's SunShot Initiative, Alta Devices produces solar cells that convert sunlight into electricity at world record-breaking levels of efficiency. Through its innovative solar technology Alta is helping bring down the cost of solar. Learn more about the Energy Department's efforts to advance solar technology at energy.gov/solar .

Mattos, Laila; Le, Minh

2013-05-29

6

Data Mining Tools Irfan Altas  

E-print Network

Data Mining Tools Irfan Altas School of Information Studies, Charles Sturt University Wagga Wagga discuss several scalable and parallel discovery and predictive data mining tools. They successfully address many of the computational challenges associated with the analy­ sis of data sets with millions

Turlach, Berwin A.

7

1 INTRODUCCIN Las geomembranas de polietileno de alta densidad  

E-print Network

años era el más empleado en obra hidráulica fue el poli(cloruro de vinilo plastificado) PVC-P (Aguiar ca- sos volvió a ser PVC-P, en otros PEAD y en menos ocasiones caucho terpolímero de etileno fue construido en el año 1989 y se im- permeabilizó con una geomembrana de PVC-P re- forzada con un

Zornberg, Jorge G.

8

AltaVista Babelfish Translation  

NSDL National Science Digital Library

The well-known AltaVista search service has teamed with SYSTRAN Software, Inc. (discussed in the January 24, 1997 Scout report) to offer this web page translation service in the language pairs of English-Spanish, English-French, English-German, English-Portugese, and English-Italian from the main Altavista page. Users can search and then simply hit the translate button, at which time the language options are given. Users may also use the direct translation page; at present this method is more effective when page content is cut and pasted directly than when an URL is specified. Translations, as might be expected, tend to be fairly wooden.

1997-01-01

9

A Temporal Comparison of AltaVista Web Searching  

Microsoft Academic Search

Major Web search engines, such as AltaVista, are essen- tial tools in the quest to locate online information. This article reports research that used transaction log analy- sis to examine the characteristics and changes in AltaVista Web searching that occurred from 1998 to 2002. The research questions we examined are (1) What are the changes in AltaVista Web searching from

Bernard J. Jansen; Amanda Spink; Jan O. Pedersen

2005-01-01

10

Marcadores biolgicos de estrs oxidativo. Distribucin por edad y sexo de las concentraciones basales de MDA, NO y cido rico en nios y adolescentes de Maracaibo-Venezuela  

Microsoft Academic Search

Despite recognition of the detrimental effects of malondial- dehyde (MDA), nitric oxide (NO) and uric acid on oxidative stress, this hypothesis has not yet been tested in healthy chil- dren and adolescents. The objective of the present study was to describe the behavior of these parameters, in a sample of healthy children and adolescents from Maracaibo, Zulia State, Venezuela. After

Souki A; Cano C; Mengual E; Garca D; Torres D; Almarza J; Len L; Chvez Z; Molero E; Medina M; Flix Gmez

2007-01-01

11

Las Vegas  

NASA Technical Reports Server (NTRS)

This image of Las Vegas, NV was acquired on August, 2000 and covers an area 42 km (25 miles) wide and 30 km (18 miles) long. The image displays three bands of the reflected visible and infrared wavelength region, with a spatial resolution of 15 m. McCarran International Airport to the south and Nellis Air Force Base to the NE are the two major airports visible. Golf courses appear as bright red areas of worms. The first settlement in Las Vegas (which is Spanish for The Meadows) was recorded back in the early 1850s when the Mormon church, headed by Brigham Young, sent a mission of 30 men to construct a fort and teach agriculture to the Indians. Las Vegas became a city in 1905 when the railroad announced this city was to be a major division point. Prior to legalized gambling in 1931, Las Vegas was developing as an agricultural area. Las Vegas' fame as a resort area became prominent after World War II. The image is located at 36.1 degrees north latitude and 115.1 degrees west longitude.

The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

2001-01-01

12

Multitasking Web Search on Alta Vista Amanda Spink* &  

E-print Network

regular search sessions in terms of queries per session and duration, (3) both Excite and Allthe1 Multitasking Web Search on Alta Vista Amanda Spink* & Minsoo Park School of Information Sciences-6459 Fax: (814) 865-6424 E-mail: jjansen@ist.psu.edu Jan Pedersen Chief Scientist Overture Web Search

Jansen, James

13

Carne cocinada a altas temperaturas y el riesgo de cncer  

Cancer.gov

Hoja informativa que explica en qu forma algunos compuestos qumicos se forman en la carne que se cocina usando mtodos de alta temperatura, como frer en sartn o asar a la parrilla, y describe los resultados de estudios sobre la relacin entre el consumo de estos compuestos qumicos y el riesgo de cncer.

14

TCD Research Methods Fall 2004 LAS 6292 (Sect. 6816x)  

E-print Network

TCD Research Methods ­ Fall 2004 LAS 6292 (Sect. 6816x) Thursday, Periods 6-8 (12:50- 3:50) 376 and development. Required textbooks, available at Goering's Books and Bagels: 1. Bernard, H.R. 1995. Research Methods in Anthropology: Qualitative and Quantitative Approaches, 3rd edition. AltaMira Press, Walnut

Pilyugin, Sergei S.

15

Patellar Maltracking Is Prevalent Among Patellofemoral Pain Subjects with Patella Alta: An Upright, Weightbearing MRI Study  

E-print Network

Patellar Maltracking Is Prevalent Among Patellofemoral Pain Subjects with Patella Alta: An Upright is to determine if patellar maltracking is more prevalent among patellofemoral (PF) pain sub- jects with patella alta compared to subjects with normal patella height. We imaged 37 PF pain and 15 pain free subjects

Delp, Scott

16

An Analysis of Multimedia Searching on AltaVista Bernard J. Jansen  

E-print Network

An Analysis of Multimedia Searching on AltaVista Bernard J. Jansen School of Information Sciences 1070 Arastradero Road Palo Alto, CA USA 94304 jan.pedersen@av.com ABSTRACT Web searching is a significant activity for many people seeking multimedia information. Major Web search engines, such as Alta

Jansen, James

17

Distal Hemorrhoidectomy With ALTA Injection: A New Method for Hemorrhoid Surgery.  

PubMed

Abstract Aluminum potassium sulfate and tannic acid injection (ALTA) is a useful and less-invasive treatment for internal hemorrhoids. However, it is not a treatment option for external hemorrhoidal diseases, including mixed hemorrhoids. Distal hemorrhoidectomy with ALTA injection involves surgical resection of external piles, followed by injection therapy on internal piles. We report technical details and the short-term results of this procedure in patients with mixed hemorrhoids. Seventy-two patients with mixed hemorrhoids treated between 2010 and 2011 were included. The main outcome measures were the short-term response and complication rates. At 28 days after surgery, the disappearance rate of prolapse was 100%. Three patients (4%) had postoperative complications, all minor in nature. No prolapse recurrence was observed within a median follow-up period of 6 months. Distal hemorrhoidectomy with ALTA injection appears to be a promising treatment option for patients with mixed hemorrhoids. PMID:24833156

Abe, Tatsuya; Hachiro, Yoshikazu; Ebisawa, Yoshiaki; Hishiyama, Houhei; Kunimoto, Masao

2014-01-01

18

Recreational activities and loss of diversity in grasslands in Alta Manzanares Natural Park, Spain  

Microsoft Academic Search

We studied the effects of trampling at four grassland sites in the Biosphere Reserve of the Cuenca Alta del Ro Manzanares Natural Park. The richness and diversity of plant species are shown to decrease with increasing soil compaction in certain areas and the indicator species associated with these changes are identified. The compaction values for which the loss of species

F. Javier Gmez-Limn; Jos V. de Lucio

1995-01-01

19

Bacteria adds to fly lifespan Calgary Herald Calgary, Alta.:Aug 17, 2004. p. A4  

E-print Network

Bacteria adds to fly lifespan Calgary Herald Calgary, Alta.:Aug 17, 2004. p. A4 Abstract (Article Summary) Exposing the insect drosophila to bacteria at various moments of its notoriously short existence, the researchers found if bacteria were successful in latching onto a host fly within the first four to seven days

Seroude, Laurent

20

EMPODERAMENTO DA ASSOCIAO DE MES OURO VERDE NO MUNICPIO DE ALTA FLORESTA-MT  

Microsoft Academic Search

4 Prof. Eng. Agrnomo M.Sc. UNEMAT. RESUMO - O princpio do associativism o foi a maneira encontrada pelas mulheres da comunidade Ouro Verde no municpio de Alta Floresta - MT para promover o esprito da governana pela unio para tomada de decises na busca do bem estar das famlias rurais por intermdio da promoo de eventos comunitrios e criao de

DELMONTE ROBOREDO; TATIANE CARINE DE OLIVEIRA; DO NASCIMENTO; DANIELA FERNANDA CAVALLI; CASSIANO GARCIA ROQUE

21

Hotel Trias/ UPC Tarifes UPC 2011 * Temporada Alta: Del 18/06/2010 a 04/09/2010* Temporada Alta: Del 18/06/2010 a 04/09/2010* Temporada Alta: Del 18/06/2010 a 04/09/2010  

E-print Network

Tramuntana 202,54 Temporada Alta, Mitja i Baixa IVA no incl. Temporada Alta: Del 17/6 a 31/8 Temporada Mitja/12 Tarifa UPC 2011 Allotjament i esmorzar Temporada Baixa* IVA no incl. Temporada Mitja* IVA no incl. Temporada Alta* IVA no incl. Habitació Doble - ?s individual 59,26 71,30 109,58 Habitació Doble 68,52 94

Politècnica de Catalunya, Universitat

22

Patellar maltracking is prevalent among patellofemoral pain subjects with patella alta: an upright, weightbearing MRI study  

PubMed Central

The purpose of this study is to determine if patellar maltracking is more prevalent among patellofemoral (PF) pain subjects with patella alta compared to subjects with normal patella height. We imaged 37 PF pain and 15 pain free subjects in an open-configuration magnetic resonance imaging scanner while they stood in a weightbearing posture. We measured patella height using the Caton-Deschamps, Blackburne-Peel, Insall-Salvati, Modified Insall-Salvati, and Patellotrochlear indices, and classified the subjects into patella alta and normal patella height groups. We measured patella tilt and bisect offset from oblique-axial plane images, and classified the subjects into maltracking and normal tracking groups. Patellar maltracking was more prevalent among PF pain subjects with patella alta compared to PF pain subjects with normal patella height (two-tailed Fishers exact test, p < 0.050). Using the Caton-Deschamps index, 67% (8/12) of PF pain subjects with patella alta were maltrackers, whereas only 16% (4/25) of PF pain subjects with normal patella height were maltrackers. Patellofemoral pain subjects classified as maltrackers displayed a greater patella height compared to the pain free and PF pain subjects classified as normal trackers (two-tailed unpaired t-tests with Bonferroni correction, p < 0.017). This study adds to our understanding of PF pain in two ways - 1) we demonstrate that patellar maltracking is more prevalent in PF pain subjects with patella alta compared to subjects with normal patella height; and 2) we show greater patella height in PF pain subjects compared to pain free subjects using four indices commonly used in clinics. PMID:23165335

Pal, Saikat; Besier, Thor F.; Beaupre, Gary S.; Fredericson, Michael; Delp, Scott L.; Gold, Garry E.

2012-01-01

23

Apogee Imaging Systems Alta F42 CCD Camera with Back Illuminated EV2 CCD42-The Apogee Alta F42 CCD Camera has a back-illuminated full frame 4 megapixel EV2 CCD42-40  

E-print Network

Apogee Imaging Systems Alta F42 CCD Camera with Back Illuminated EV2 CCD42- 40 Sensor The Apogee Alta F42 CCD Camera has a back-illuminated full frame 4 megapixel EV2 CCD42-40 sensor with very high quantum efficiency. Midband, broadband, and UV-enhanced versions of the CCD are available. Ideal

Kleinfeld, David

24

Las Vegas Strip History  

NSDL National Science Digital Library

Created by amateur cultural historian Deanna DeMatteo, this site offers "the most detailed history of the Las Vegas Strip on the Internet today," showing in words and graphics the evolution of the properties on the Strip from its beginning to the present. Drawing on materials provided by publications, professional Las Vegas historians, and the Nevada State Museum and Historical Society, DeMatteo offers a detailed, noncommercial history with plenty of photographs (many archival) of the strip from the first night club in 1930 named Pair O Dice to the first true casino hotel, El Rancho with 63 rooms in 1941, to Hilton's giant Paris Las Vegas opening earlier this Fall with 2,914 rooms. There is also a special topics section, covering people significant in the strip's development, such as Warren "Doc" Bayley and Howard Hughes. Launched in August, the Website is continually updated with new material. Note: to reach table of contents, click on the photograph at end of the homepage.

Dematteo, Deanna.

25

78 FR 18972 - Alta Wind X, LLC; Supplemental Notice That Initial Market-Based Rate Filing Includes Request for...  

Federal Register 2010, 2011, 2012, 2013

...Regulatory Commission [Docket No. ER13-1150-000] Alta Wind X, LLC; Supplemental Notice That Initial Market-Based Rate Filing...supplemental notice in the above-referenced proceeding, of Alta Wind X, LLC's application for market-based rate authority,...

2013-03-28

26

ANLISE EXPERIMENTAL DE PILARES DE CONCRETO ARMADO DE ALTA RESISTNCIA SOB FLEXO COMPRESSO RETA  

Microsoft Academic Search

RESUMO Com este projeto obtiveram-se informaes sobre o comportamento de pilares sob compresso excntrica, executados com concreto de alta resistncia, com resistncia mdia compresso de 80MPa. Os pilares tinham seo transversal retangular 15cm x 30cm com comprimento livre de 174cm. Foram analisados seis pilares, onde as variveis foram as taxas de armaduras transversais e longitudinais. Os pilares foram ensaiados

Romel Dias Vanderlei; Jos Samuel Giongo

27

Quimioterapia de alta dosis prolonga en forma significativa la supervivencia en pacientes con leucemia mieloide aguda  

Cancer.gov

Los resultados preliminares de un estudio clnico grande con asignacin al azar de pacientes de 16 a 60 aos de edad con leucemia mieloide aguda (LMA), un cncer de la sangre y de la mdula sea, que no haba sido tratada anteriormente, muestran que los pacientes que recibieron una alta dosis de daunorrubicina, un frmaco de quimioterapia disponible comercialmente, durante la terapia inicial vivieron ms que los pacientes que recibieron una dosis normal del mismo frmaco.

28

76 FR 3881 - Application To Export Electric Energy; TransAlta Energy Marketing (U.S.) Inc.  

Federal Register 2010, 2011, 2012, 2013

...SUMMARY: TransAlta Energy Marketing (U.S.) Inc. (TEMUS...two-year term using existing international transmission facilities...utilities, Federal power marketing agencies, and other entities...United States. The existing international transmission facilities...

2011-01-21

29

Distribuzioni angolari dei rami neri e grigi in stelle di media ed alta energia  

Microsoft Academic Search

RiassuntoSono state studiate le distribuzioni e le correlazioni angolari fra i rami neri e grigi in stelle di media (500700 MeV) ed\\u000a alta (8004000 MeV) energia. La notevole anisotropia presente, anche per i rami meno energici, nelle stelle di media energia\\u000a decresce in modo rilevante al crescere dell'energia della stella. Si notano alcune differenze nell'andamento delle distribuzioni\\u000a angolari e delle

G. Belliboni; B. Vitale

1953-01-01

30

The Alta Stock, Utah: An Exemplar Rock Suite for Learning Metamorphic Concepts  

NASA Astrophysics Data System (ADS)

Using rock suites in a discovery-based setting is a terrific way to learn important petrologic processes and concepts such as the role of fluids during metamorphism, phase equilibrium, and metastability to name just a few. A particularly effective rock suite we use in our petrology course is from the contact aureole of the Tertiary Alta stock in Utah. The intrusion of the Alta stock into Paleozoic dolostone containing chert nodules produced a well-defined contact metamorphic aureole that includes talc-, tremolite-, forsterite-, and periclase-in field isograds (Cook and Bowman, 2000). Students work in free-form groups with collaboration between groups to define the mineral assemblages using hand samples and thin sections from throughout the areole and then work out what they think are the important petrologic processes that worked together to form what they see. The main goals of the exercise include: 1) learning to identify mineral assemblages common to metamorphosed siliceous dolostones; 2) learning to infer metamorphic reactions from progressive changes in mineral assemblages; 3) being able to identify balanced metamorphic reactions responsible for isograds mapped in the field; 4) begin to develop an understanding of how bulk composition and fluid composition controls mineral assemblages; and 5) learning how to infer the temperature and fluid composition evolution of the Alta stock aureole based on published T-X(CO2)diagrams. This suite is particularly effective because all the important minerals the students observe in thin section can be defined by the easy to plot and understand CaO-MgO-SiO2 system. This offers the opportunity to introduce (or reinforce) the concept of plotting minerals in composition space, using the phase rule to define the variance of your system, using tie lines to define stable mineral assemblages, and the flipping of tie lines to produce univariant reactions. In addition, the students work out the topology of these reactions in P-T space by plotting the resulting Shreinemaker's bundles and (hopefully) drawing on their developing geologic intuition on which phases should fall on the high temperature side of the univariant reaction line. Other important processes that can be addressed by this suite include the role of fluids during metamorphism, nucleation and growth of metamorphic minerals, metastability (e.g. there are beautiful reaction rims of brucite around periclase), and the influence of bulk composition on stable mineral assemblages (e.g. wollastonite is present in some rocks). Reference: Cook, S.J., and Bowman, J.R. (2000) Mineralogical evidence for fluid-rock interaction accompanying prograde contact metamorphism of siliceous dolomites: Alta Stock Aureole, Utah, USA. Journal of Petrology, 41, 739-757.

Davidson, C.; Haileab, B.

2003-12-01

31

Natural and induced endoreic hydrological conditions in the Alta Murgia karstic region (Apulia, Southern Italy)  

NASA Astrophysics Data System (ADS)

A study aimed at understanding the hydrological processes in karst areas related to the presence of natural and artificial endoreic basins and their modification due to land use change, as well as the influence of above factors on the infiltration rate has been carried out in the Alta Murgia region (Apulia, Southern Italy). The region is a Cretaceous limestone plateau of the Apulian platform, characterized by a mature karstic landscape: due to its elevation, climatic conditions and lithology, the plateau constitutes the main recharge area of the Murgia aquifer. The typical karst topography is essentially related to the subterranean drainage (sinkholes, caves, conduit): surface and subsurface karst geomorphology is strictly interrelated with hydrology. The morphological features of the karstic plateau are defined by the high density of surface karstic forms (mainly dolines), the presence of exposed karst and karren fields, as well as by the extensive outcrop of fractured rocks. Karst surface shows, on the bottom of the morpho-structural depressions called "lame", natural distribution of modest deposits of "terra rossa" and regolith. The "lame" work as streams during and after intense rainfall events, often outlining a primordial ephemeral hydrographical network, frequently convergent towards dolines, poljes or endoreic basins. Alta Murgia shows many natural endoreic basin conditions in a quite flat morphology. In this environment, when intense rainfall events cover large areas and rainfall intensity exceeds the infiltration capacity of soils and/or sinkholes, significant runoff amounts are produced and stored in the basins causing floods. Most of the natural endoreic basins are small and independent: while the majority of them continue functioning as endoreic even in presence of extreme events of high return time, others (quasi-endoreic), under the same circumstances can start contributing to other basins, due to exceeding their water storage capability. This way, very large flow can cascade down towards more depressed areas. Another important feature of the Alta Murgia territory is that the whole area is characterised by a high degree of division into parcels, physically delimited by a well developed network of drystone walls. These have been built during centuries by using stones retrieved from the same fields, having the main role of preserving soils from erosion. The drystone walls that limit the parcels define induced endoreic conditions, where runoff, mostly prevented from discharging out, rather converges toward natural drainage systems and internal depressions, where afterwards infiltrates: the walls allow a high infiltration rate of precipitation of low and medium intensity with low evapotranspiration, while the runoff basically activates only during highest intensity events. The drystone walls have preserved in the time the characteristics of the karst surface, with its high hydraulic conductivity consequent to the negligible outcrop of soils; because of their capability of decreasing the runoff triggering threshold, drystone walls have always worked positively inside the endoreic and quasi-endoreic basins. The above characteristics of both natural and artificial endoreic basins indicate that the definition of the water balance for the Alta Murgia aquifer is complex, requiring a model able to take into account, not only the absorption capacity of the karstic surface textures (which, indeed, are able to delay the start of the runoff due to the need to reach first the saturation of terra rossa in the fissures, pockets and fillings of karst hollows) but also the hydraulic behaviour and geomorphological features of the basins constituting on the whole the recharge area. To make the situation even more complex, in the last decades, the territory was subject to a particular type of land use change, the stone shattering (that is performed by crushing and grinding the karst surface), aimed at making suitable the parcels for mechanized agriculture. While the original situation of Alta Murgia

Canora, F.; Fidelibus, M. D.; Spilotro, G.

2009-04-01

32

The effects of land use change on mercury distribution in soils of Alta Floresta, Southern Amazon.  

PubMed

This study presents the spatial distribution, degree of contamination and storage capacity of Hg in surface forest and pasture soils from Alta Floresta, Southern Amazon, a significant gold mining site from 1980 to 1996. During that period, average annual gold production was about 6.5 tons, with an estimated Hg annual emission to the environment of about 8.8 tons, 60-80% of it being emitted to the atmosphere. Mercury sources to the region are mining sites and gold-dealer shops at the city of Alta Floresta, where gold is smelted and commercialized. Mercury concentrations in forest soils (15-248 ng g(-1), average=61.9 ng g(-1)) were 1.5-3.0 times higher than in pasture soils (10-74 ng g(-1), average=33.8 ng g(-1)), suggesting strong re-mobilization after deforestation. Highest Hg concentrations were found within a distance of 20-30 km from mining sites in both soil types. The influence of the refining operations within the city of Alta Floresta, however, was less clear. Somewhat higher concentrations were observed only within a 5 km radius from the city center where gold-dealer shops are located. Wind direction controls the spatial distribution of Hg. Background concentrations (15-50 ng g(-1)) were generally found at the outer perimeter of the sampling grid, about 40 km from sources. This suggests that Hg released from mining and refining activities undergoes rapid deposition. Estimated cumulative Hg burdens for the first 10 cm of soil averaged 8.3 mg m(-2) and 4.9 mg m(-2), for forest and pasture soils respectively and compare well with ultisols and hydromorphic oxisols, but were lower than those found in yellow-red and yellow latosols and podsols from other Amazonian areas. Our results show that changing land use in the Amazon is a strong re-mobilizing agent of Hg deposited on soils from the atmosphere. PMID:14987810

Lacerda, Luiz D; de Souza, Margareth; Ribeiro, Mario G

2004-05-01

33

SOBRE EL USO DE LOS PROCESOS SINPTICOS OBJETIVOS Y LOS MODELOS METEOROLGICOS A ALTA RESOLUCIN PARA EL  

E-print Network

base bimestral), denominadas procesos sinópticos objetivos, o PSOs. Básicamente, el algoritmo, que modelo meteorológico de mesoescala a alta resolución (2x2 km2 ) para un día característico de varios PSOs

Politècnica de Catalunya, Universitat

34

Energy control system - An advanced approach for TransAlta utilities  

SciTech Connect

TransAlta Utilities, the largest investor owned electric utility in Canada, is implementing an advanced Energy Control System to be located in Calgary, Alberta. This Energy Control System (ECS) consists of four large-scale processors configured as a Main Applications Computer (MAC) and a Security Applications Computer (SAC) with the remaining two processors in a dual redundant mode with the MAC and SAC. The system includes MMI equipment and advanced SCADA interfacing hardware which supports the Sequence of Events (SOE) function. This paper provides a functional description of the overall Energy Control System configuration and the software provided. Some of the advanced functions provided include a Decoupled State Estimator, a Decoupled Operators Load Flow, a Contingency Evaluation Program which allows enhanced flexibility in defining contingencies, a constrained VAR dispatch program which will provide control advisories to the operator or to the Automatic VAR Control program to implement the changes required, and an Operators Training System which includes simulation of the power system relays and cyclic non-conforming loads. The interrelationship of the programs and subsystems is discussed, as well as the Man Machine Interface provided to effectively use them.

Thornton, L.A.; Bowman, D.H.; Christie, R.D.; Snyder, W.L.

1983-10-01

35

Photoemission study of the growth and modification of the Al/Ta(110) interface  

NASA Astrophysics Data System (ADS)

The Al/Ta(110) interface is studied as a function of Al coverage and temperature (300

di Marzio, D.; Ruckman, M. W.; Qiu, S. L.; Jiang, L.; Chen, J.; Strongin, M.

1989-03-01

36

Canad, Colombia y las Amricas  

Microsoft Academic Search

El acercamiento de Canad a las zonas latinoamericanas cada es ms notorio. Su llegada a la OEA y su historia poltica de una democracia sin reparos la perfilan como lder. Es as que Colombia tiene en este pas un apoyo slido para ampliar su comercio y resolver sus problemas de narcotrfico.

Mara Teresa Aya

37

Environmental exposure to mercury in the urban area of Alta Floresta  

SciTech Connect

Mercury has been released into the Amazonia ecosystem as a result of gold mining activities over the past 15 years. Metallic mercury is used to amalgamate gold particulate. During the amalgamation process, a significant amount of metallic Hg finds its way into the aquatic and terrestrial systems. About 65 to 83% of the total mercury emission by gold mining activities enters directly into the atmosphere. The inorganic Hg is then methylated by microbiota and the organic Hg is bioaccumulated within the aquatic food chain, from which humans are a top predator. Alta Floresta is the most important gold trading center in Amazonia. The urban population is exposed to a high concentration of Hg in the atmosphere, ranging from 23 to 5,788 ng/m{sup 3}. Also the mercury levels in fishes eaten locally are high, mainly in fish from Teles Pires river. Nine from the eleven species most consumed by the urban population are carnivorous, and constitute about 98% of all fish eaten locally. The highest Hg levels are found in Brachyplastistoma sp. (Piraiba), ranging from 1.7 to 3.0 {mu}g/g (w.w.) and Paulicea Luetkin (Jau), ranging from 0.4 to 2.7 {mu}g/g (w. w.) assuming an average fish consumption rate of 31 grams per day, an weighted average of Hg fish concentration of 1.2 {mu}g/g, an average body weight for adults of 60 kg and an average exposure duration of 8 years, the estimated incorporation 0.63 pg of Hg per kg of body weight would imply that attention should be given to the critical groups such as children and woman in the child-bearing age, since fetus are more sensitive to mercury than adults.

Hacon, S.; Rochedo, E.R.R.; Calysto, R.R.; Lacerda, L.D.

1994-12-31

38

La independencia de Mxico y las misiones de las Californias: espaoles versus mexicanos, 1821-1833  

Microsoft Academic Search

La secularizacin de las misiones de las Californias, gobernadas por religiosos dominicos y franciscanos, todos ellos de origen espaol, fue motivo de preocupacin de los distintos gobiernos de la primera repblica mexicana. A pesar de la creencia generalizada de que fueron las leyes liberales las que hicieron desaparecer las misiones, se demuestra en este trabajo que fue el rechazo de

Jess Ruiz de Gordejuela Urquijo

2008-01-01

39

Oxygen isotope, TitaniQ, and cathodoluminescence analyses of the Alta Stock, UT: Preliminary insights into pluton assembly  

Microsoft Academic Search

The Alta Stock in the Wasatch Mountains of Utah provides an excellent opportunity to test new geochemical approaches for investigating the assembly history of plutons. Oxygen isotope values of quartz were analyzed and compared with quartz crystallization temperatures using the newly calibrated TitaniQ (titanium-in-quartz) geothermometer. Oxygen isotope values range from 8.80\\/00 to 10.00\\/00, and do not correlate in any obvious

B. W. Johnson; J. R. Bowman; J. W. Valley; J. M. Bartley

2009-01-01

40

Alta FT-150: The Thruster for LISA Pathfinder and LISA/NGO Missions  

NASA Astrophysics Data System (ADS)

FT-150 FEEP thruster has successfully completed an endurance test at Alta's Micropropulsion laboratory. The updated thruster design dramatically enhances performance with respect to previous FEEP devices and marks a major step forward in the LISA Pathfinder and NGO programmes as well as space propulsion capability in general. The test campaign took place in two parts. Firstly, the new design was tested to validate that the new configuration was compliant with the requirements of the Lisa Pathfinder mission with particular emphasis on the achievement of required total impulse and minimum and maximum thrust levels.The second part of the campaign was aimed at testing a worst-case DFACS profile of the LISA Pathfinder mission using the Elegant Breadboard Power Control Unit (EBB PCU) commanding at 10 Hz and acquiring at 50 Hz. Both purposes of the campaign were successfully met. A total impulse of more than 1080 Ns and a firing time of more than 3500 hours were achieved. No degradation of efficiency and performance was recorded over the entire test. During the first part, more then 600 Ns of total impulse and about 2000 hours of firing time were achieved. Different thrust profiles were commanded with an average thrust of about 87 ?N. The minimum and maximum thrust were 1 ?N and 150 ?N respectively. Short periods at zero N (i.e. thruster switched-off) were also commanded. The measured mass efficiency and specific impulse, 60% and 8000 s respectively, demonstrated that the current design of the thruster is fully compatible with the much larger impulse requirement of LISA mission. The simulation of the worst-case DFACS cycles at 10 Hz was also successfully performed. Three different DFACS cycles representative of the worst cases were performed. These cycles highlighted one of the main advantages of this technology: the controllability and response time that can be verified immediately with electrical feedback parameters like total voltage and beam current (data collected at 50 Hz during the test). The thrust noise was also calculated from electrical parameters, filtered to obtain flawless acquisition at 50 Hz. The article provides a view of the thruster configuration, vacuum facility and test set-up, the electrical parameters of the thruster, the main parameters recorded by the diagnostic system and the details of the behavior of the TA-PCU system during the performance of the worst DFACS profile of the LISA Pathfinder mission.

Paita, L.; Cesari, U.; Nania, F.; Priami, L.; Rossodivita, A.; Giusti, N.; Andrenucci, M.; Estublier, D.

2013-01-01

41

Las Cruces MPO 2040 Metropolitan Transportation Plan  

E-print Network

?A ANA COUNTY June 9, 2010 LAS CRUCES METROPOLITAN PLANNING ORGANIZATION Policy Committee Sharon Thomas, Chair - City of Las Cruces Scott Krahling, Vice Chair - Do?a Ana County Mayor Nora Barraza - Town of Mesilla Olga Pedroza - City of Las... Cruces Leticia Benavidez - Do?a Ana County Sam Bernal - Town of Mesilla Gill Sorg - City of Las Cruces Karen Perez - Do?a Ana County Linda Flores - Town of Mesilla Staff Tom Murphy, AICP, MPO Officer Andrew Hume, Planner Caeri Thomas...

Las Cruces Metropolitan Planning Organization

2010-06-09

42

todasuvida: Las personas con diabetes son ms  

E-print Network

diabetes Controlesu todasuvida: Las personas con diabetes son más propensas a padecer de enfermedades del corazón que quienes no tienen diabetes. Boletín 631 D Las personas con diabetes tienen mayor- res relacionados con la diabetes, como derrame cerebral, mala circulación en las piernas y pies e

43

Art & craft: Creative fiction and Las Vegas  

Microsoft Academic Search

This article provides a review of the contrasting ways in which modern essayists and novelists have reflected their experience of Las Vegas. The author suggests that while Las Vegas may serve as a convenient symbol for depression and alienation, contemporary fiction also celebrates Las Vegas for its life-enhancing impact. These themes are fused with surreal imagination in the novelKeno Runner

David Spanier

1995-01-01

44

Human influence on late Holocene fluvial landscape and stratigraphy in the Mixteca Alta of Oaxaca, Mexico  

NASA Astrophysics Data System (ADS)

The Mixteca Alta of south-central Mexico (state of Oaxaca) is a high-elevation plateau where population and agricultural steadily grew over the past 3000 years, but with a few significant episodes of population decline. Currently, the landscape is highly eroded and gullied in response to widespread land abandonment and diminished population attributed to the Spanish conquest during the 1500s and 1600s. Abandonment apparently resulted in neglect of prehistoric cross-drainage retaining walls, known as lama-bordos, which had been constructed throughout agricultural watersheds for millennia to retain runoff and sediment. Our research seeks to establish the earliest ages for construction of lama-bordos, which are buried by more than 10 m of alluvium in some localities; and we hope to determine if the chronology of alluvial sedimentation is related to fluctuations in population density versus climate changes or other drivers. Sampling is focused on relatively small tributary watersheds (<10 km^2) in the valley of Rio Culebra near the town of Coixlahuaca. Our general hypothesis is counter to Malthusian theory in that we posit land degradation and erosion was punctuated by episodes of population decline when there were insufficient people to maintain the lama-bordo infrastructure. Methods involve: (1) detailed stratigraphic and pedogenic description and sampling of several outcrops; (2) radiocarbon and luminescence dating of stratigraphic sections; (3) geochemical and lithological tracing of sedimentary beds to discriminate time periods of gully erosion; (4) relating the alluvial chronology to archaeological surveys that have established the occupation history of the region. Results indicate that upland gully erosion had occurred prior to widespread human occupation of the area, because >4000 cal yr BP cut-and-fill stratigraphic units commonly contain detritus from upland subsoil and underlying bedrock. We provide numerous radiocarbon dates for the oldest lama-bordos, and they suggest that initial construction predates 2500 cal yr BP, which is older than prevailing archaeological evidence has indicated. It appears the lama-bordos were constructed to trap gully-derived upland sediment to facilitate agriculture (largely maize cultivation). Geochemistry and lithology indicate excellent discrimination of upland soil-surface versus upland gully-derived subsoil detritus, so we are optimistic about correlating periods of exacerbated upland erosion with cultural periods of abandonment. This correlation of upland gully erosion and rapid bottomland sedimentation appears clear for the post-conquest abandonment period (1520s-1600s) until bottomlands also became gullied during the middle 1600s, but we await more radiocarbon dates to extend such correlations back in time to fully test our hypothesis. Our research is shedding new light on the extent to which people have manipulated and managed upland erosion and bottomland sedimentation for thousands of years in Mesoamerica.

Leigh, D. S.; Holdridge, G. H.; Kowalewski, S. A.

2011-12-01

45

Las Vegas: An Unconventional History  

NSDL National Science Digital Library

As part of the PBS series American Experience, this well-designed siteexplores the history and idiosyncrasies of Las Vegas. The film, andaccompanying book, which the web site is based on will both be availablethis fall (the film airs in November on PBS), and the site certainlywhets viewers appetites for both. A nice range of information iscovered on the site which includes everything from information aboutNevada's nuclear testing in the fifties, to Rat Pack reminiscences and ofcourse, wedding photos. If you'd like to share your own Vegas weddingtale there is an interactive portion of the site dedicated to the topic.Packed with time lines, a teacher's guide, maps and much more this site(and film and book by the same name) are worthy of attention.

2005-01-01

46

Radionuclide content of Las Vegas wash sediments  

Microsoft Academic Search

The Las Vegas Wash is an excavated waterway channel which drains all surface water and effluent discharge from sewage-treatment facilities from the greater Las Vegas Metropolitan Area to Lake Mead. Runoff and erosion processes are expected to transport man-made radioactivity that was deposited over the past several decades in the Las Vegas Valley. Additionally, radionuclides disposed of via the city`s

M. J. Rudin; A. M. Meyers; W. H. Johnson

1996-01-01

47

BOARD OF REGENTS James Dean Leavitt , Chair.........................................................Las Vegas  

E-print Network

William G. Cobb ................................................................................Reno. Page............................................................................. Las Vegas Raymond

Hemmers, Oliver

48

Las Vegas bets on a sure winner  

Microsoft Academic Search

To protect the quality of Lake Mead and Las Vegas Wash in Nevada, six water treatment alternatives and three wastewater treatment plants in the Las Vegas Valley were analyzed. The treatment plants and the treatment alternatives are described. Studies on cost-effectiveness, functional limitations, environmental impact, and energy-efficiency of the treatment alternatives are discussed. The low lime treatment mode should be

J. B. Gilbert; G. L. Culp; J. E. Salo

1980-01-01

49

Las infecciones emergentes transmitidas por garrapatas  

Microsoft Academic Search

ResumenLas infecciones transmitidas por garrapatas aparecen por todo el mundo y son bien conocidas desde hace ms de 100 aos. Algunas enfermedades transmitidas por garrapatas son muy comunes mientras que otras son extremadamente raras. Las tcnicas genticas moleculares modernas (y la mayor disponibilidad de la reaccin en cadena de la polimerasa) han llevado al descubrimiento y la clasificacin de nuevos

Ingomar Mutz

2009-01-01

50

Capitulo 3 Las estructuras basicas de la  

E-print Network

Versi´on prelim inar Cap´itulo 3 Las estructuras b´asicas de la Combinatoria Cuando contamos y enumeramos, cuando hacemos Combinatoria, aparecen con frecuencia unas estructuras b´asicas, que merecen estas estructuras b´asicas: explicaremos los contextos en las que aparecen unas u otras y aprenderemos

Fernández Gallardo, Pablo

51

Leaving Las Vegas: Exposure to Las Vegas and risk of suicide.  

PubMed

Residents of Las Vegas, Nevada have much higher suicide rates than residents of other metropolitan counties in the USA. Whether the risk of suicide among visitors to Las Vegas is also significantly elevated has been difficult to assess because person-time denominator information is not available. We used a case-control design to examine the association between exposure to Las Vegas and risk of suicide expressed as mortality odds ratios. We conceptualized four different types of potential suicide risk with respect to Las Vegas: (1) risk of suicide among usual residents of Las Vegas ("chronic risk"), (2) risk of suicide among temporary visitors to Las Vegas ("acute risk"), (3) risk of suicide among Las Vegas residents visiting elsewhere ("leaving Las Vegas risk"), and (4) risk of suicide among travelers in general ("traveler risk"). Controlling for age, gender, marital status, and year effects, the odds of suicide among Las Vegas residents was at least 50% greater than among residents elsewhere in each of the three decades we observed. Visitors to Las Vegas were at double the risk compared to those who stayed in their home county. Leaving Las Vegas was associated with a greater than 20% reduction in risk for suicide. Traveling to Las Vegas is associated with a twofold increase in risk compared to traveling elsewhere. We discuss three possible theoretical frameworks to help explain our observed results: ecological effects, whereby social factors unique to Las Vegas, or uniquely amplified in Las Vegas, result in increased risk to both residents and visitors; selection effects whereby those predisposed to suicide disproportionately choose Las Vegas to reside in and visit; and contagion effects, whereby high numbers of suicides tend to lead to even greater numbers over time, as people emulate the suicides of others. We compare our empirical evidence for each of the effects with existing sociological and historical scholarship on Las Vegas. PMID:18938005

Wray, Matt; Miller, Matthew; Gurvey, Jill; Carroll, Joanna; Kawachi, Ichiro

2008-12-01

52

Interactions between LAS and nonionic surfactants  

Microsoft Academic Search

Physicochemical interactions between linear alkylbenzene sulfonate (LAS) and various linear alcohol nonionics (NI) have been\\u000a investigated. The effect of adding nonionic to LAS on critical micelle concentration (cmc), surface tension, water hardness\\u000a sensitivity and detergency performance depends on both hydrophobe and hydrophile structure. The addition of low levels of\\u000a a lauryl range-high EO nonionic surfactant significantly lowers cmc and causes

Michael F. Cox; Nelson F. Borys; Ted P. Matson

1985-01-01

53

AGRO-ENERGY PRODUCTION AS A DRIVING FORCE IN THE SOCIO-ECOLOGICAL TRANSITION OF RURAL ENVIRONMENTS: A SIGNIFICANT CASE STUDY WITHIN THE ALTA  

E-print Network

1 AGRO-ENERGY PRODUCTION AS A DRIVING FORCE IN THE SOCIO-ECOLOGICAL TRANSITION OF RURAL-European rural region, the Alta Murgia National Park in the Italian region of Apulia, as the socio-economic framework for a new culture of territorial development, ingenerated by the local diffusion of dedicated

Paris-Sud XI, Université de

54

Relating storm and weather factors to dry slab avalanche activity at Alta, Utah, and Mammoth Mountain, California, using classification and regression trees  

Microsoft Academic Search

Using classification and regression tree models, we evaluated 31 factors in terms of their importance to explaining avalanche activity indices at two ski areas: Alta, UT and Mammoth Mountain, CA. This study derived new empirical factors that combined wind velocity with new snow amount, air temperatures with time, and total snow depth with time. The analyses created over-fit tree models

Robert E Davis; Kelly Elder; Daniel Howlett; Eddy Bouzaglou

1999-01-01

55

Nitrogen and Phosphorus Hydrochemistry in Las Vegas Wash.  

National Technical Information Service (NTIS)

The sources of nitrogen and phosphorus nutrient species, the chemical reactions occurring, and the parameters of nutrient uptake were studied for the Las Vegas Wash hydrologic system. Las Vegas Wash, a natural drainage channel running from Las Vegas Valle...

A. Schmidt, J. W. Hess

1980-01-01

56

Las Cruces International Airport (LRU) Pavement Condition and Analysis  

E-print Network

. Design Aircraft Used for Runway Pavement Design 20 1. Las Cruces International Airport (LRU) Aircraft Operations (2008-09) 5 .........Table 2. Las Cruces International Airport (LRU) Predicted Aircraft Operations 2007-2027 6 .............Figure 2. Las

Cal, Mark P.

57

Biodiversity of Saccharomyces cerevisiae populations in Malbec vineyards from the "Zona Alta del Ro Mendoza" region in Argentina.  

PubMed

The "Zona Alta del Ro Mendoza" (ZARM) is the major Malbec grape viticulture region of Argentina. The aim of the present study was to explore Saccharomyces cerevisiae biodiversity in ZARM vineyards. Interdelta PCR and RFLP mtDNA molecular markers were applied to differentiate S. cerevisiae strains. The presence of commercial strains on ZARM vineyards was also assessed. Our results reveal a highly diverse, but genetically closely related, S. cerevisiae population (containing more than 190 molecular patterns among 590 S. cerevisiae isolates). According to the S. cerevisiae strain diversity found in vineyards, they were classified as vineyards with high and low polymorphic S. cerevisiae populations. Six vineyards showed a high polymorphic population, with more than 20 different S. cerevisiae molecular patterns. S. cerevisiae populations in these vineyards were diverse and irregularly distributed, with different strains in each vineyard site. Low polymorphic S. cerevisiae population vineyards displayed very low yeast diversity, with only 9 to 10 different S. cerevisiae strains and presence of two commercial strains widely distributed. Population diversity estimators were calculated to determine the population structure of S. cerevisiae in the ZARM vineyards. The obtained values support the hypothesis that the eight sampled subpopulations come indeed from a larger population. PMID:22056145

Mercado, Laura; Sturm, Mara Elena; Rojo, Mara Cecilia; Ciklic, Ivn; Martnez, Claudio; Combina, Mariana

2011-12-15

58

The philosophical foundations of Las Vegas.  

PubMed

Las Vegas is a city that has long challenged social norms of the rest of the United States and built a highly successful economic base on gambling and other hedonistic pursuits. Now that many other states and communities are pursuing or actively considering following the route of legal casinos for economic development purposes, the ethical considerations that have confronted Las Vegas about the question of gambling and its broader social impacts take on greater import.This paper examines the ethics of gambling relative to Las Vegas at two levels: first, as a pragmatic trade-off of accepting an activity with some bad consequences because of the economic benefits that can be derived; and second, more fundamentally, by examining the validity of the major ethical arguments against gambling. PMID:24233351

Scriven, M

1995-03-01

59

15,000-yr pollen record of vegetation change in the high altitude tropical Andes at Laguna Verde Alta, Venezuela  

NASA Astrophysics Data System (ADS)

Pollen analysis of sediments from a high-altitude (4215 m), Neotropical (9N) Andean lake was conducted in order to reconstruct local and regional vegetation dynamics since deglaciation. Although deglaciation commenced 15,500 cal yr B.P., the area around the Laguna Verde Alta (LVA) remained a periglacial desert, practically unvegetated, until about 11,000 cal yr B.P. At this time, a lycopod assemblage bearing no modern analog colonized the superpramo. Although this community persisted until 6000 cal yr B.P., it began to decline somewhat earlier, in synchrony with cooling following the Holocene thermal maximum of the Northern Hemisphere. At this time, the pioneer assemblage was replaced by a low-diversity superpramo community that became established 9000 cal yr B.P. This replacement coincides with regional declines in temperature and/or available moisture. Modern, more diverse superpramo assemblages were not established until 4600 cal yr B.P., and were accompanied by a dramatic decline in Alnus, probably the result of factors associated with climate, humans, or both. Pollen influx from upper Andean forests is remarkably higher than expected during the Late Glacial and early to middle Holocene, especially between 14,000 and 12,600 cal yr B.P., when unparalleled high values are recorded. We propose that intensification of upslope orographic winds transported lower elevation forest pollen to the superpramo, causing the apparent increase in tree pollen at high altitude. The association between increased forest pollen and summer insolation at this time suggests a causal link; however, further work is needed to clarify this relationship.

Rull, Valent; Abbott, Mark B.; Polissar, Pratigya J.; Wolfe, Alexander P.; Bezada, Maximiliano; Bradley, Raymond S.

2005-11-01

60

Radionuclide content of Las Vegas wash sediments  

SciTech Connect

The Las Vegas Wash is an excavated waterway channel which drains all surface water and effluent discharge from sewage-treatment facilities from the greater Las Vegas Metropolitan Area to Lake Mead. Runoff and erosion processes are expected to transport man-made radioactivity that was deposited over the past several decades in the Las Vegas Valley. Additionally, radionuclides disposed of via the city`s sanitary system are expected to accumulate in the Wash sediments. Fine and coarse sediment samples were collected at 100 m intervals and analyzed to determine the distribution of alpha- and gamma-emitting radionuclides in the lower 5,500 in of the Las Vegas Wash. Results indicate little accumulation of long-lived fission products in upstream Wash sediments. However, trace amounts of fission products measured in downstream sediments suggest the resuspension and transport of radioactive particulate matter within the Wash. Levels of naturally-occurring radionuclides found in Wash sediments were found to be consistent with levels typically found in southeast Nevada soils.

Rudin, M.J.; Meyers, A.M.; Johnson, W.H. [Univ. of Nevada, Las Vegas, NV (United States)

1996-06-01

61

Women and Las Navas de Tolosa  

Microsoft Academic Search

Sources do not particularly attend to women and Las Navas de Tolosa, neither their direct experience of the battle, nor the impact of the battle on their status in the aftermath although they tell us more than we might expect. More significantly, current historiography of medieval women suggests that such watershed events do not fit with the continuities and

Miriam Shadis

2012-01-01

62

en las ciencias marinas Revista Universitaria  

E-print Network

animales, alimento principal de estos seres marinos. A partir de una recopilación de lo mejor de los que las estrellas de mar son animales que ejecutan su movimiento gracias a que están llenas de agua

Hernández-Walls, Rafael

63

Wilson Botanical Garden Las Cruces Biological Station  

E-print Network

Wilson Botanical Garden Las Cruces Biological Station Apdo. 73-8257 San Vito, Coto Brus, COSTA RICA you can do to help at the Wilson Botanical Garden, please email us at lcruces@ots.ac.cr. Tree Tour finally finished the Wilson Botanical Garden Tree Tour booklet in both Spanish and English. The self

Sekercioglu, Cagan Hakki

64

Impact of land-cover change in the Southern Amazonia climate: a case study for the region of Alta Floresta, Mato Grosso, Brazil  

Microsoft Academic Search

The transformation of forest into pastures in the Brazilian Amazon leads to significant consequences to climate at local scale.\\u000a In the region of Alta Floresta (Mato Grosso, Brazil), deforestation has been intense with over half the forests being cut\\u000a since 1970. This article first examines the evolution of precipitation observed in this region and shows a significant trend\\u000a in the

Vincent Dubreuil; Nathan Debortoli; Beatriz Funatsu; Vincent Ndlec; Laurent Durieux

65

Aircraft Accident Report - Las Vegas Airlines, Piper PA-31-350, N44LV, Las Vegas, Nevada, August 30, 1978.  

National Technical Information Service (NTIS)

About 0747 P.d.t., August 30, 1978, Las Vegas Airlines Flight 44, a Piper PA-31-350 (N44LV), crashed in VFR conditions shortly after takeoff from runway 25 at the North Las Vegas Airport, Las Vegas, Nevada. Flight 44 was a charter flight from Las Vegas, N...

1978-01-01

66

La importancia de las vas de introduccin  

E-print Network

barcos o transporte de mercancías). Animales como el visón, el visón americano (Mustela vison) y muchos de los animales, de modo similar, se pueden señalar la ganadería, la caza, el recreo (mascotas), la animales de compañía, vertido de restos de jardinería en el medio natural, etc.). Centrándonos en las

García-Berthou, Emili

67

Advanced Airborne CO2 LAS System  

NASA Astrophysics Data System (ADS)

A unique airborne Laser Absorption Spectroscopy (LAS) system has been developed by ITT Space Systems, LLC to address the needs of the National Research Council Decadal Survey Tier 2 mission for Active Sensing of CO2 Emissions over Nights, Days and Seasons (ASCENDS). This instrument has undergone multiple airborne field tests in cooperation with our partners at NASA Langley Research Center (LaRC). The instrument was built largely with off-the-shelf components and uses high reliability telecom components, including lasers, modulators and fiber amplifiers as the transmitter. Multiple wavelengths are transmitted simultaneously from a single collimator and the return signal is collected by a simple 8 telescope that is fiber coupled to a HgCdTe APD. The analog signal is sampled with a high resolution scope card housed in a National Instruments PXI chassis and the digitized signal is then passed through our custom-built software-based lock-in processing system which allows separation of the signals from the individual wavelengths. The separated signals are then used in the standard Differential Absorption Lidar (DIAL) relations to determine the integrated column differential optical depth. This presentation will give a detailed overview of this multi-frequency, single-beam, synchronous lock-in LAS instrument including the basic methodology of the measurement. Recent improvements in the lock-in methodology designed to eliminate the effects of multi- path fading and frequency dependence of the electronic components will also be discussed.

Dobler, J. T.; Braun, M. G.; McGregor, D. P.; Erxleben, W. H.; Browell, E. V.; Harrison, F. W.

2009-12-01

68

University Libraries University of Nevada, Las Vegas University of Nevada, Las Vegas  

E-print Network

tremendously over the past decade. These changes, which center on the assumption of unprecedented levels with the Media In November, Center Director David G. Schwartz spoke with approximately 44 print, online, radio, and television media contacts. Several events in Las Vegas, including the renaming of the Hilton, were newsworthy

Hemmers, Oliver

69

LAS ILUSTRACIONES EN LA ENSEANZA-APRENDIZAJE DE LAS CIENCIAS. ANLISIS DE LIBROS DE TEXTO  

Microsoft Academic Search

Resumen. Este trabajo centra su atencin en la importancia que poseen las ilustraciones que utilizan los libros de texto de ciencias para la comprensin de su contenido. Para ello se parte de una fundamentacin terica en cuanto a los requisitos que deberan cumplir aqullas para favorecer su adecuado procesamiento, as como la diferente morfologa que suelen presentar en los libros

F. JAVIER; JUAN DE DIOS

2002-01-01

70

Impact of land-cover change in the southern Amazonia climate: a case study for the region of Alta Floresta, Mato Grosso, Brazil.  

PubMed

The transformation of forest into pastures in the Brazilian Amazon leads to significant consequences to climate at local scale. In the region of Alta Floresta (Mato Grosso, Brazil), deforestation has been intense with over half the forests being cut since 1970. This article first examines the evolution of precipitation observed in this region and shows a significant trend in the decrease in total precipitation especially at the end of the dry season and at the beginning of the rainy season. The study then compares the temperatures measured in cleared and forested sectors within a reserve in the area of Alta Floresta (Mato Grosso, Brazil) between 2006 and 2007. The cleared sector was always hotter and drier (from 5% to 10%) than the forested area. This difference was not only especially marked during the day when it reached on average 2C but also seemed to increase during the night with the onset of the dry season (+0.5C). The Urban Heat Island effect is also evident especially during the night and in the dry season. PMID:21479561

Dubreuil, Vincent; Debortoli, Nathan; Funatsu, Beatriz; Ndlec, Vincent; Durieux, Laurent

2012-01-01

71

Las pequeas y medianas empresas exportadoras mexicanas ante los mercados exteriores  

Microsoft Academic Search

Las pequeas y medianas empresas acceden mayoritariamente a los mer- cados internacionales a travs de la exportacin. Las caractersticas nacio- nales de los pases ejercen una influencia importante en la predisposicin de las Pymes hacia la internacionalizacin. Por otro lado, las propias caracte- rsticas de las empresas, sus recursos y capacidades condicionan tambin las actitudes de las empresas hacia la

Claudia Ramrez Carranza; Enrique Ortega Martnez

72

Las Vegas Basin Seismic Response Project: Preliminary Results From Seismic Refraction Experiments, Las Vegas, NV.  

NASA Astrophysics Data System (ADS)

In May and September 2002, seismic refraction data were acquired in the Las Vegas basin. Located in the southern Basin and Range province, the cities of Las Vegas, North Las Vegas, and Henderson sit atop a fault-bounded basin with a depth of up to 5 km and basin dimensions of roughly 60 km wide (east-west) by 50 km in length (north-south). Previous isostatic gravity, seismic reflection, and aeromagnetic studies indicate that a series of sub-basins exist beneath the unconsolidated basin fill, with the deepest sub-basin occurring 5 km west of the fault block bounding the eastern edge of the basin (Frenchman Mountain). The basin is significantly deeper along its northern extremity, following the path of the fault block bounding the northern edge of the basin (Las Vegas Valley Shear Zone), and along the western edge of Frenchman Mountain. Recent, paleoseismic studies have indicated that faults in the Las Vegas region have the potential for an earthquake of M6.5 to 7.0. It is estimated that a M6.9 earthquake in the basin could produce about 11 billion dollars in damage and a significant number of deaths and/or injuries. In addition, an equivalent or larger event in the Death Valley fault zone, 150 km distance, would also be devastating to the metropolitan area of approximately 1.5 million residents. Therefore, it is essential to understand the seismic hazard posed to the Las Vegas region. This project is part of a larger collaborative effort to characterize the basin and its response to ground shaking. The University of Nevada, Las Vegas with assistance from the University of Texas at El Paso, students from UNLV and UTEP, volunteers from the community and several students from Centennial High school deployed 432 portable seismic recorders ("Texans") throughout the valley. Shot point locations were located at three quarries in the valley, one to the north, one to the east and one to the southwest. The profiles cross the Las Vegas Valley Shear zone as well as a prominent NW/SE trending step in the basin floor across which the basement drops from 2 to 4 km in depth. In addition, the profiles cross several Quaternary fault scarps, which have recently been identified as tectonic in origin. Preliminary analyses of the seismic refraction data indicate that the basin has an average P-wave velocity of 4.5 km/s and is in agreement with the estimated basin depths from isostatic gravity studies (2 to 5 km depth). Both tomographic inversion and forward modeling techniques are being used to analyze these data. These data will be used to produce a velocity model of the basin and image the basin/bedrock contact. In addition, these data will be integrated into a community model, which is being produced by the Las Vegas Basin Seismic Response working group to further assess the site response of the basin.

Zaragoza, S. A.; Snelson, C. M.; Harder, S. H.; Kaip, G.; Luke, B.; Buck, B. J.; Hanson, A. D.

2002-12-01

73

Relacin entre lpidos sricos y estado de las vitaminas C y E como antioxidantes en adultos mayores venezolanos  

Microsoft Academic Search

RESUMEN. En el envejecimiento se observa tendencia a hiperlipidemias, cambios en la distribucin de lipoprotenas y una declinacin del sistema de defensa antioxidante del organismo. El objetivo de este estudio fue relacionar concentraciones sricas de colesterol total, fracciones, triglicridos y Vitaminas C y E. Se evaluaron 61 adultos mayores de 60 aos de edad, de enero-marzo, 2006. Se diagnostic estado

Lesbia Meertens; Gloria Naddaf; Adelmo Rodrguez

2008-01-01

74

Las Nuevas Tecnologas de Vehculos Diesel (y sus  

E-print Network

Las Nuevas Tecnologías de Vehículos Diesel (y sus emisiones) Arón Jazcilevich Con la colaboración El 36% de las PM2.5 es emitido por los vehículos a diesel (autobuses y tractocamiones). ahora se consideran las emisiones de Diesel como causantes de cáncer de pulmón (Silverman, et al, 2011). #12;Emisiones

Grutter, Michel

75

Plant communities in multi-metal contaminated soils: a case study in the National Park of Alta Murgia (Apulia region - Southern Italy).  

PubMed

A phytosociological study was conducted in the National Park of Alta Murgia in the Apulia region (Southern Italy) to determine the adverse effects of metal contamination of soils on the distribution of plant communities. The phytosociological analyses have shown a na, remarkable biodiversity of vegetation on non-contaminated soils, while biodiversity appeared strongly reduced on metal-contaminated soils. The area is naturally covered by a wide steppic grassland dominated by Stipa austroitalica Martinovsky subsp, austroitalica. Brassicaceae such as Sinapis arvensis L. are the dominating species on moderated contaminated soils, whereas spiny species of Asteraceae such as Silybum marianum (L.) Gaertn. and Carduus pycnocephalus L. subsp, pycnocephalus are the dominating vegetation on heavily metal-contaminated soils. The presence of these spontaneous species on contaminated soils suggest their potential for restoration of degraded lands by phytostabilization strategy. PMID:24933890

Perrino, E V; Brunetti, G; Farrag, K

2014-01-01

76

Fingerprint Indexing Based on LAS Registration , Chao Zhang1  

E-print Network

Fingerprint Indexing Based on LAS Registration Tong Liu1 , Chao Zhang1 and Pengwei Hao1,2 1 Fingerprint indexing is an efficient technique that greatly improves the performance of fingerprint based method based on fingerprint registration with a novel feature called local axial symmetry (LAS

Hao, Pengwei

77

Translational genomics of Vegetable Crops Las Vegas, NV  

E-print Network

Translational genomics of Vegetable Crops Las Vegas, NV July 21, 2005 David Francis and Allen Van Deynze At the recent ASHS meetings in Las Vegas, a workshop "Translational Genomics of Vegetable Crops interventions" (Minna and Gazdar, 1996). In applied plant science, "translational genomics" implies

Douches, David S.

78

Diagnostico de las Fuentes No convenionales de Energa en Colombia  

Microsoft Academic Search

El dicumento considera ejes transversales y ejes verticales. Los primeros estn relacionados con aspectos que conciernen a todas las FNCE como son el marco legal y regulatorio, y los aspectos ambientales de las FNCE. A continuacin se desarrollan ejes verticales, uno por cada fuente. El captulo 2 hace una revisin y anlisis del marco institucional, de poltica y regulatorio. Plantea

Ernesto Torres; Jos Maria Rincn; Edinson Lozano

2011-01-01

79

University of Nevada, Las Vegas Emergency Information .......................................................................2  

E-print Network

disaster on campus (airplane crash) Medical emergency Unknown odor To report a nonUniversity of Nevada, Las Vegas Emergency Information 2010 #12;2 University of Nevada, Las Vegas Directory 2009-2010 EmErgEncy! In the event of an emergency

Cho, Hokwon

80

LAS - LAND ANALYSIS SYSTEM, VERSION 5.0  

NASA Technical Reports Server (NTRS)

The Land Analysis System (LAS) is an image analysis system designed to manipulate and analyze digital data in raster format and provide the user with a wide spectrum of functions and statistical tools for analysis. LAS offers these features under VMS with optional image display capabilities for IVAS and other display devices as well as the X-Windows environment. LAS provides a flexible framework for algorithm development as well as for the processing and analysis of image data. Users may choose between mouse-driven commands or the traditional command line input mode. LAS functions include supervised and unsupervised image classification, film product generation, geometric registration, image repair, radiometric correction and image statistical analysis. Data files accepted by LAS include formats such as Multi-Spectral Scanner (MSS), Thematic Mapper (TM) and Advanced Very High Resolution Radiometer (AVHRR). The enhanced geometric registration package now includes both image to image and map to map transformations. The over 200 LAS functions fall into image processing scenario categories which include: arithmetic and logical functions, data transformations, fourier transforms, geometric registration, hard copy output, image restoration, intensity transformation, multispectral and statistical analysis, file transfer, tape profiling and file management among others. Internal improvements to the LAS code have eliminated the VAX VMS dependencies and improved overall system performance. The maximum LAS image size has been increased to 20,000 lines by 20,000 samples with a maximum of 256 bands per image. The catalog management system used in earlier versions of LAS has been replaced by a more streamlined and maintenance-free method of file management. This system is not dependent on VAX/VMS and relies on file naming conventions alone to allow the use of identical LAS file names on different operating systems. While the LAS code has been improved, the original capabilities of the system have been preserved. These include maintaining associated image history, session logging, and batch, asynchronous and interactive mode of operation. The LAS application programs are integrated under version 4.1 of an interface called the Transportable Applications Executive (TAE). TAE 4.1 has four modes of user interaction: menu, direct command, tutor (or help), and dynamic tutor. In addition TAE 4.1 allows the operation of LAS functions using mouse-driven commands under the TAE-Facelift environment provided with TAE 4.1. These modes of operation allow users, from the beginner to the expert, to exercise specific application options. LAS is written in C-language and FORTRAN 77 for use with DEC VAX computers running VMS with approximately 16Mb of physical memory. This program runs under TAE 4.1. Since TAE 4.1 is not a current version of TAE, TAE 4.1 is included within the LAS distribution. Approximately 130,000 blocks (65Mb) of disk storage space are necessary to store the source code and files generated by the installation procedure for LAS and 44,000 blocks (22Mb) of disk storage space are necessary for TAE 4.1 installation. The only other dependencies for LAS are the subroutine libraries for the specific display device(s) that will be used with LAS/DMS (e.g. X-Windows and/or IVAS). The standard distribution medium for LAS is a set of two 9track 6250 BPI magnetic tapes in DEC VAX BACKUP format. It is also available on a set of two TK50 tape cartridges in DEC VAX BACKUP format. This program was developed in 1986 and last updated in 1992.

Pease, P. B.

1994-01-01

81

El oro en Las Mdulas: su geologa y arqueologa  

E-print Network

El oro en Las Médulas: su geología y arqueología Carlos Martín Escorza Sociedad de Amigos del Museo) El oro en Las Médulas: su geología y arqueología Carlos Martín Escorza Sociedad de Amigos del Museo-931531-3-3 #12;Senderos GeoArqueológicos, 2 (2006) 1 El oro de Las Médulas: su geología y arqueología Índice. I

Fitze, Patrick

82

Safety of the Las Vegas left-turn display.  

PubMed

This paper provides a safety evaluation of a special protected/permitted left turn signal control (Las Vegas LT Display) that has been implemented in the urbanized area of Las Vegas, Nevada. The Las Vegas LT Display eliminates the yellow trap condition for leading approach in lead/lag operation. It provides protected only left turns during certain times of day by suppressing the permitted green ball and yellow ball displays. Before and after studies were conducted using the crash data from 10 intersections. Results from the analyses indicated that no obvious safety concerns due to use of the special display. PMID:24144494

Ozmen, Ozlem; Tian, Zong Z; Gibby, A Reed

2014-01-01

83

Las dificultades de sentir: el rol de las emociones en la estigmatizaci?n del VIH/SIDA  

PubMed Central

Resumen El Virus de Inmunodeficiencia Humana (VIH) y el Sndrome de Inmunodeficiencia Adquirida (SIDA) han sido motivo de estigmatizacin para las personas que viven con ellos. Esta estigmatizacin se ha estudiado consecuentemente desde la perspectiva de opiniones de agentes estigmatizantes. Estas opiniones han obviado sistemticamente el rol de las emociones en el proceso de estigmatizacin. Llevamos a cabo este estudio con el propsito de identificar el rol de las emociones en el proceso de estigmatizacin de las personas que viven con el virus (PVVS) por parte de profesionales de la salud. Para lograr este objetivo utilizamos un diseo exploratorio y cualitativo en el cual utilizamos la tcnica de entrevistas semiestructuradas a profundidad. La muestra estuvo compuesta por 80 profesionales de la salud y estudiantes de las siguientes especialidades: psicologa, trabajo social, medicina y enfermera. Los resultados reflejaron la existencia de emociones asociadas al VIH/SIDA tales como pena, lstima, compasin, asco, fobia y miedo entre los/as profesionales y estudiantes que participaron. Las personas participantes evidenciaron la necesidad de controlar sus emociones al interactuar con PVVS. Los resultados apuntan a la necesidad de explorar aquellos factores que mediatizan las emociones, tales como el contexto social en que se manifiestan y ante quines se revelan, para lograr entender a cabalidad el estigma que rodea al VIH/SIDA. PMID:20212916

MARZAN-RODRIGUEZ, Melissa; VARAS-DIAZ, Nelson

2009-01-01

84

Wastewater treatment in Las Vegas, Santa Barbara, Honduras  

E-print Network

The Municipality of Las Vegas, Honduras is located immediately to the west of Lake Yojoa, the largest inland lake in Honduras. Beginning in 2005, the Massachusetts Institute of Technology (MIT) began working with stakeholders ...

Hodge, Matthew M

2008-01-01

85

University of Nevada Las Vegas School of Life Sciences  

E-print Network

University of Nevada Las Vegas School of Life Sciences Graduate Program Handbook Prepared by the School of Life Sciences Graduate Operations Committee Revised September 2011 #12;Table of Contents Page.............................................6 8) Coursework Requirements

Hemmers, Oliver

86

University of Nevada, Las Vegas CenterfortheAnalysisofCrimeStatistics  

E-print Network

in Clark County, Nevada: Evaluating a cross-jurisdictional approach to reducing gun violence FINAL.................................................................................................14 Las Vegas Metropolitan Police Department Data .........................15 Calls for service .................................................................15 413--Person with a gun.........................................17 413A--Person with a knife

Hemmers, Oliver

87

Visualizing Large Datasets with LAS and Google Earth  

NASA Astrophysics Data System (ADS)

As experiments and simulations in Earth System Science grow larger and more complex, dataset volumes are growing explosively. Web-based visualization and analysis of these datasets is becoming a challenge due to large amount of data and the limit of network bandwidth. The Live Access Server (LAS) is a highly configurable Web server designed to provide flexible access to visualization and analysis products generated from geo- referenced scientific datasets. In this presentation, we introduce a new capability of LAS for interactively visualizing large datasets by utilizing the view-based refresh queries of Google Earth and the automatic decimation ("striding") capabilities of Ferret. When viewing a high resolution dataset on a global scale it is wasteful of bandwidth to handle the full resolution data. With the striding capability, Ferret selects every nth point along an axis, where n is the striding value. The striding values are dynamically computed based upon the size of the area of interest. The automatic striding approach minimizes the volume of data that need be touched to visualize a large geographic area. Higher resolutions are utilized for smaller areas to reveal the fine structures. The LAS provides this behavior using Google Earth as the user interface. As users zoom or pan on Google Earth, Google Earth interacts with LAS through a Network Link, which contains the URL of a LAS server. When the view inside Google Earth stops for a set number of seconds, it makes a request to a LAS server, sending the LAS server the latitude and longitude boundaries (bounding box) of the area currently in view. The LAS server uses that information to compute stride values, instruct Ferret to generate a visualization for that particular geographic area, and send the resulting image back to Google Earth.

Li, J.; Schweitzer, R.; Hankin, S.; Manke, A.; O'Brien, K.

2007-12-01

88

Agresin Sexual Derechos de las Vctimas y Servicios Disponibles  

E-print Network

Agresión Sexual Derechos de las Víctimas y Servicios Disponibles Las víctimas necesitan soporte y llamando al No. 1-800-226-6667. Víctimas de delitos sexuales tienen varios derechos, muchos de ellos están contenidos en el Capítulo 960, Estatutos de la Florida, incluyendo el derecho de: · Mantener la información

Sura, Philip

89

Modeling of Nonpoint Source Pollution in the Las Vegas Valley  

NASA Astrophysics Data System (ADS)

The point sources of pollution (including wastewater treatment plants) within urban areas are well known. However, the contribution of nonpoint source pollution to receiving waterbodies is not as well understood. In this study, the contributions of nonpoint source runoff is evaluated and compared to the loadings from the wastewater treatment facilities in the Las Vegas Valley of southern Nevada. The entire Las Vegas Valley watershed (approximately 2300 square miles) drains to Lake Mead on the Colorado River. Lake Mead is also the main source of drinking water for Las Vegas. Thus, any runoff generated from the Las Vegas Valley could potentially have adverse impact to this drinking water source. A GIS grid based model is developed to calculate total annual nonpoint nutrients and total solid loads from the Las Vegas Valley. The watershed is subdivided and loads are estimated for all land uses. GIS is used to calculate these loads for each grid cell and then ArcView GIS tools are used to track the accumulation of pollutant loads in the storm channel network. This study uses current data obtained from Clark County GIS Management Office and Clark County Regional Flood Control District. The results of this study will assist local and State agencies in developing Total Maximum Daily Loads for the Las Vegas Wash and provide a better understanding of nonpoint source pollution.

Reginato, M.; Piechota, T. C.

2001-12-01

90

La jerarqua de efectos clsica de alta involucracin para la comprensin de la conducta de reciclaje considerando los valores de los consumidores  

Microsoft Academic Search

ResumenEl presente trabajo tiene por objeto estimar y seleccionar el modelo con jerarqua de efectos clsica que mejor represente\\u000a el comportamiento de reciclado del consumidor y, posteriormente, profundizar en las particularidades que este modelo muestra\\u000a en funcin de tres valores: el colectivismo, el materialismo y el logro. Los resultados del trabajo emprico ponen de manifiesto\\u000a la validez de este modelo

Gonzalo DaznMeneses; Asuncin Beerli Palacio

2004-01-01

91

75 FR 3755 - Notice of Availability of Draft Supplemental Environmental Impact Statement for the Upper Las...  

Federal Register 2010, 2011, 2012, 2013

...adjustments to the Upper Las Vegas Wash Conservation Transfer...in the 2004 Final Las Vegas Valley Disposal Boundary...northern portion of the Las Vegas Valley. A defined final boundary...natural functioning of the wash, and endemic plants...

2010-01-22

92

Lacustrine Records of Forest Fire Indicators and Trace Elements Deposition in an Land Use Change Region in the Brazilian Amazonia (Alta Floresta, MT)  

NASA Astrophysics Data System (ADS)

The dynamics of terrestrial ecosystems depend on interactions between the carbon cycle, nutrient cycles, and the hydrological cycle, all of which may be modified by climate and human actions. Terrestrial ecological systems, in which carbon is retained in live biomass, decomposing organic matter, and soil, play an important role in the global carbon cycle. Human activities change carbon stocks in these pools and exchanges between them and the atmosphere through land-use change and other activities. From 1850 to 1998 about 136 (+55) Gt C has been emitted as a result of land-use change, predominantly from forest ecosystems. Amazonia's carbon storage potential gives great importance to land-use changes in this region because disturbances of the natural landscape can increase atmospheric carbon and affect global biogeochemical cycles. Mercury release from gold mining activities and deforestation are the two most important environmental issues in the Amazon Basin. Gold mining activities in Amazonia have been responsible for the release of about 2000-3000 t of Hg over the last 20 y. In Alta Floresta region (southern Amazonia), concurrent with the deforestation, an intense gold rush occurred with the exploration of riverbed sediments. This region was a significant gold mining site from 1980 to 1996. This study aims to understand the atmospheric deposition rates of charcoal particles, mercury and other trace elements and discuss the environmental changes caused by man activities in an area of an intense land use change. Accordingly to the fact that in Brazilian Amazonia the colonization process generally takes place after the building of a road, an 82 cm core (AF SSW 150) was collected in a lake formed by the barrier effect of a road embankment and distant 150 km of the center of Alta Floresta city. The ages of the sedimentary sections in the core were calculated by the activity of 210Pb. The grain size profile showed a huge change from 1985, with the dominance of fine material. Before 1985, the coarse fractions prevailed. The counting of charcoal particles was done in microscopic laminas. Charcoal particles were present along the entire lacustrine faces of the core, but the greater concentrations were found in the top of the core, from 1980 to 2000, with the greatest peak in 1985. The percentual of organic carbon showed the same behavior of the charcoal, indicating that the greater fraction of the organic carbon in this sediment is from allochthonous material. The concentrations of Hg and other major and trace elements (Al, As, Co, Cr, Ti, V, Zn) also increased significantly from 1985. The AF SSW 150 core shows that the charcoal, Hg and other trace elements deposition are related to the land use change and gold mining. Trace elements and charcoal fluxes presented low values at the beginning of the human occupation (prior to 1980). At the beginning of the 1980s, there was an increase in the forest fires and mining activities. From 2000 to 2005 all the elements analyzed showed a decreased in their concentrations.

Rodrigues, R. R.; Conceico, M. G.; Cordeiro, R. C.; Turcq, B. J.; Seoane, J. S.; Sifeddine, A.

2009-05-01

93

Relative importance of the saturated and the unsaturated zones in the hydrogeological functioning of karst aquifers: The case of Alta Cadena (Southern Spain)  

NASA Astrophysics Data System (ADS)

SummaryFrom analysis of the hydrodynamic and hydrochemical responses of karst springs, it is possible to know the behaviour of the aquifers they drain. This manuscript aims to contribute to the characterization of infiltration process, and to determine the relative importance of the saturated zone and of the unsaturated zone in the hydrogeological functioning of carbonate aquifers, using natural hydrochemical tracers. Thus, chemical components together with temperature and electrical conductivity (both punctual and continuous records) have been monitored in three springs which drain Alta Cadena carbonate aquifer, Southern Spain. An evaluation of the percentage of the electrical conductivity frequency peaks determined for each of the three springs is linked to the chemical parameters that comprise the conductivity signal. One of these springs responds rapidly to precipitation (conduit flow system), due to the existence of a high degree of karstification in the unsaturated zone and in the saturated zone, both of which play a similar role in the functioning of the spring. Another spring responds to precipitation with small increases in water flow, somewhat lagged, because the aquifer has a low degree of karstification, even in the unsaturated zone, which seems to influence its functioning more strongly than does the saturated zone. The third spring drains a sector of the aquifer with a moderately developed degree of karstification, one that is intermediate between the other two, in which both the unsaturated zone and the saturated zone participate in the functioning of the spring, but with the latter zone having a stronger influence. These three springs show different hydrogeological functioning although they are in similar geological and climatic contexts, which show the heterogeneity of karst media and the importance of an adequate investigation for groundwater management and protection in karst areas.

Mudarra, M.; Andreo, B.

2011-02-01

94

A community-based organization: the Las Mercedes Project.  

PubMed

Using the Las Mercedes Project as an example, the aim of this article is to discuss the philosophy and practice of community-based projects. At the core of such projects is a shift in understanding the nature of community. A community, in this case, represents a reality that persons construct that determines the character of rules, norms, and the focus and style of interventions. Additionally, community-based organizations, such as the Las Mercedes Project, are fully participatory, decentered, and carry the imprint of a community's members. Community-based projects, in this regard, improve the likelihood of creating successful interventions. PMID:22409639

Murphy, John W

2012-01-01

95

Efectos olvidados en las relaciones de causalidad de las acciones del sistema de capacitacin en las organizaciones empresariales = Forgotten effects of the causality relationships in the knowledge management in tourism organizations  

Microsoft Academic Search

Se propone y se desarrolla un procedimiento desde el paradigma de la complejidad que, partiendo de las caractersticas ms generales que permiten identificar a las organizaciones tursticas como sistemas sociales humanos complejos, valora los impactos de la capacitacin en la consecucin de las metas organizacionales. El procedimiento se aborda desde la aplicacin del modelo de valoracin de los efectos olvidados

Jess Miguel Rodrguez Rubinos; Miguel Armando Ramrez Reyes; Vicente Daz Pontones

2008-01-01

96

El Informe Anual a la Nacin Muestra que la Incidencia de Cncer y las Tasas de Mortalidad estn Declinado: Las Tasas de Supervivencia Reflejan Progreso Significativo  

Cancer.gov

Las organizaciones ms importantes de la Nacin informan que los riesgos de la poblacin americana a contraer o morir a causa de cncer continan disminuyendo mientras que las tasas de supervivencia para muchos tipos de cncer continan aumentando.

97

Las zonas mineras espaolas a finales del XIX  

Microsoft Academic Search

PRESENTACIN Jugh James Rose, capelln de las compaas mineras inglesas, francesas y alemanas de Linares, es el autor de la obra Untrodden Spain and her black country being sketches of the life and character of the Spaniard of the interior publicada en dos volmenes en Londres en 1875. De l sabemos que ejerci como capelln del ejrcito en Dover y

Mara Antonia Lpez Burgos

2003-01-01

98

Modeling of Nonpoint Source Pollution in the Las Vegas Valley  

Microsoft Academic Search

The point sources of pollution (including wastewater treatment plants) within urban areas are well known. However, the contribution of nonpoint source pollution to receiving waterbodies is not as well understood. In this study, the contributions of nonpoint source runoff is evaluated and compared to the loadings from the wastewater treatment facilities in the Las Vegas Valley of southern Nevada. The

M. Reginato; T. C. Piechota

2001-01-01

99

Characterization of Storm Runoff in Las Vegas Valley, Nevada.  

National Technical Information Service (NTIS)

The total salinity of storm runoff is an important consideration. The purpose of this research was to develop background data on the chemical characteristics of storm runoff in Flamingo Wash, Las Vegas Valley. Seven runoff events were sampled at four site...

J. W. Hess, D. E. Zimmerman

1980-01-01

100

Source Water Assessment for the Las Vegas Valley Surface Waters  

Microsoft Academic Search

The 1996 amendment to the Safe Drinking Water Act of 1974 created the Source Water Assessment Program (SWAP) with an objective to evaluate potential sources of contamination to drinking water intakes. The development of a Source Water Assessment Plan for Las Vegas Valley surface water runoff into Lake Mead is important since it will guide future work on source water

S. P. Albuquerque; T. C. Piechota

2003-01-01

101

A Passion For Excellence University of Nevada, Las Vegas  

E-print Network

A Passion For Excellence University of Nevada, Las Vegas PGA Golf Management University of Nevada of Teaching. William F. Harrah College of Hotel Administration The PGA Golf Management program is a part-8697 PGA Golf Management Contact Information For more information regarding curriculum, cost or other

Hemmers, Oliver

102

Effects of Water Conservation on Evapotranspiration in Las Vegas, Nevada  

Microsoft Academic Search

Las Vegas, Nevada, is a rapidly growing arid city that is experiencing significant challenges in water consumption. Most of the water is used outdoors, precluding recycling and reuse of water. With a large increase in population, the Southern Nevada Water Authority created the Water Smart Landscape Program to limit outdoor water usage. This study used remote sensing images and techniques

Joseph Belli

2011-01-01

103

Control del dolor: Apoyo para las personas con cncer  

Cancer.gov

Contiene informacin sobre las medicinas contra el dolor para pacientes con cncer, los planes para controlarlo, cmo hablar con su equipo de atencin mdica sobre el dolor que usted siente y qu hacer para controlar los efectos fsicos y emocionales del mismo.

104

La Globalizacin de las marcas espaolas : liderazgo y notoriedad internacional  

Microsoft Academic Search

Este trabajo analiza la expansin reciente de la empresa multinacional espaola y su efecto directo en un mayor posicionamiento de marcas espaolas en los mercados internacionales y una mejor y ms reforzada imagen pas. El anlisis terico conceptual se refuerza con datos descriptivos de las investigaciones ms recientes realizadas por el Foro de Marcas Renombradas Espaolas sobre el liderazgo y

Julio Cervio; Jaime Rivera Camino

2007-01-01

105

Victoria Varga, `04 Las Matas de Farfan, Dominican Republic  

E-print Network

of Charity at their Nutritional Center for Children in Las Matas de Farfan was one of the most rewarding, Elaine and I worked with some of the most beautiful children that temporarily resided there. They were in great need of our attention and caring. There were approximately 60 children between the ages of 0

106

Geology of Las Vegas, Nevada, United States of America  

Microsoft Academic Search

Las Vegas is one of the fastest growing cities in the US. Its regional geologic setting is in the Basin and Range geomorphic province and in the Sevier orogenic belt. The city itself lies in a broad north-south valley formed by coalescing alluvial fans and lake beds which give rise to several soil and foundation problems. Although destructive earthquakes have

R. V. Wyman; M. Karakouzian; V. Bax-Valentine; L. Peterson; S. Palmer; D. B. Slemmons

1993-01-01

107

Las Vegas Serves up Biodiesel for Local Schools  

SciTech Connect

This 2-page Clean Cities fact sheet describes the use of biodiesel as a fuel source in buses by the Clark County School District, located in Las Vegas, NV. It includes information on the history of the program, along with contact information for the local Clean Cities Coordinator and Clark County School District.

Not Available

2004-04-01

108

College of Arts and Sciences LAS Latin American Studies  

E-print Network

College of Arts and Sciences LAS Latin American Studies KEY: # = new course * = course changed AMERICA. (3) An interdisciplinary approach to the people, culture and development of the Latin American LATIN AMERICAN LITERATURE IN TRANSLATION (Subtitle required). (3) This course examines particular

MacAdam, Keith

109

Las Rocas Nos Cuentan (Rocks Tell Their Stories)  

ERIC Educational Resources Information Center

Many Earth science lessons today still focus on memorizing the names of rocks and minerals. This led the author to develop a lesson that reveals the fascinating stories told by rocks through the study of their physical properties. He first designed the lesson for Puerto Rican teachers, hence its Spanish title: "Las Rocas Nos Cuentan Su Historia."

Llerandi-Roman, Pablo A.

2012-01-01

110

FLORAY VEGETACION Parque Natural Sierras de Cazorla, Segura y Las  

E-print Network

/pinum L.), el Grosellero Uva -Espina (Rives uva-crispa L.) y el Mundo (Viburnum opu/us L.), entre las más. Sanicu/a europaea L. Tussi/ago farfara L. Bonetero (Euonimus latifolius) . Frutos de Mundo (Viburnum opulus) Paracerrar este apartado tenemos que hacer men- ció

Herrera, Carlos M.

111

Seleccin de los principales problemas de seguridad de las vacunas  

Microsoft Academic Search

ExtractoEjemplos recientes de los principales beneficios en salud pblica de la vacunacin incluyen reducciones globales de la mortalidad por sarampin y el registro de niveles bajos de enfermedades evitables por vacunas en Estados Unidos. No obstante, los problemas reales o percibidos de seguridad de las vacunas pueden ejercer un impacto adverso sobre los programas de vacunacin. La monitorizacin slida de

John K. Iskander; Jane Gidudu; Nelson Arboleda; Wan-Ting Huang

2008-01-01

112

DEPARTMENT OF ART & ARCHAEOLOGY ART 394/LAS 394  

E-print Network

DEPARTMENT OF ART & ARCHAEOLOGY ART 394/LAS 394 APPLICATION SEMINAR IN PRE-COLUMBIAN MAYA ART: Friday April 15, 2011 This course examines Pre-Columbian Maya art and archaeology from the perspective will take a required study trip to Guatemala to visit world-renown archaeological sites, national museums

Bou-Zeid, Elie

113

Southwestern Willow Flycatcher Surveys Along the Las Vegas Wash, Clark County, Nevada, 2012.  

National Technical Information Service (NTIS)

The Las Vegas Wash Coordination Committee, a 29-member stakeholder group, is working to stabilize and enhance the Las Vegas Wash (Wash), the channel that drains flows from the Las Vegas Valley to Lake Mead at Las Vegas Bay. The Wash also flows through the...

D. Van Dooremolen

2012-01-01

114

Southwestern Willow Flycatcher Surveys Along the Las Vegas Wash, Clark County, Nevada, 2013.  

National Technical Information Service (NTIS)

The Las Vegas Wash Coordination Committee (LVWCC), a 29-member stakeholder group, is working to stabilize and enhance the Las Vegas Wash (Wash), the channel that drains flows from the Las Vegas Valley to Lake Mead at Las Vegas Bay. The Wash also flows thr...

D. Van Dooremolen

2014-01-01

115

Anaerobic treatment of sludge: focusing on reduction of LAS concentration in sludge  

Microsoft Academic Search

Anaerobic degradation of linear alkylbenzene sulfonates (LAS) was tested in continuous stirred tank reactors (CSTR). LAS12 was used as a model compound and was spiked on sewage sludge. The experiments clearly showed that transformation of LAS12 occurred under anaerobic conditions. The degree of transformation varied between 14% and 25%. HPLC analysis showed that disappearance of LAS12 was followed by the

F. Haggensen; A. S. Mogensen; I. Angelidaki; B. K. Ahring

2002-01-01

116

VARIABLES SIGNIFICATIVAS EN LAS RELACIONES VIOLENTAS EN PAREJAS JVENES: UNA REVISIN  

Microsoft Academic Search

Resumen La violencia en las parejas jvenes es un precursor de la violencia en las pare- jas adultas. En las parejas jvenes la violencia suele ser psicolgica, plantearse de forma sutil y ser menos grave que en las parejas en la vida adulta. Por lo que se refiere a los agresores, la violencia es ms frecuente cuando hay ciertas variables

Itxaso Gonzlez-Ortega; Enrique Echebura; Paz de Corral

2008-01-01

117

Hacia una mejor educacin rural: impacto de un programa de intervencin a las escuelas en Colombia  

Microsoft Academic Search

Utilizando informacin censal de las sedes educativas rurales de Colombia el presente trabajo evala el impacto que tuvo el Programa de Educacin Rural PER - en las tasas de eficiencia (cobertura, reprobacin, aprobacin y desercin) y calidad de la educacin en las sedes en donde se aplic. A travs de la implementacin de modelos educativos flexibles adaptados a las

Catherine Rodrguez; Fabio J. Snchez T; Armando Armenta

2007-01-01

118

Quercus 201 Noviembre 2002 / 39 agua como las copas de los  

E-print Network

S Quercus 201 Noviembre 2002 / 39 agua como las copas de los bosques tropicales, caso de algunos géneros de driópi- dos. Otras han ocupado las aguas freáticas o intersticia- les y muestran todas las mediterránea, y otros ambientes, como las aguas continentales, también pueden ser extraordinariamente ricos (1

Murcia, Universidad de

119

Geophysical Studies of the Las Vegas Urban Corridor  

NSDL National Science Digital Library

The Geophysical Studies of the Las Vegas Urban Corridor Area are part of an integrated effort to "geologically characterize the seismic hazards, water resources, and crustal structure of this rapidly growing urban corridor" by the USGS. The informational Web site contains a gravity map of the Las Vegas region, an aeromagnetic map, and a publications link with a list of over a dozen references. Seven of these publications are freely available for download with titles such as "Aeromagnetic Survey of the Amargosa Desert," "Nevada and California: A Tool for Understanding Near-Surface Geology," and Hydrology and Principal Facts for Gravity Stations in the Vicinity of Coyote Spring Valley, Nevada, with Initial Gravity Modeling Results." An interesting collection of unique resources, the site should be of interest to professionals in a wide variety of fields.

2001-01-01

120

Solar hot water system installed at Las Vegas, Nevada  

NASA Technical Reports Server (NTRS)

A solar energy hot water system installed in a motor inn at Las Vegas, Nevada is described. The inn is a three story building with a flat roof for installation of the solar panels. The system consists of 1,200 square feet of liquid flat plate collectors, a 2,500 gallon insulated vertical steel storage tank, two heat exchangers, and pumps and controls. The system was designed to supply approximately 74 percent of the total hot water load.

1981-01-01

121

The Ritual of Solrzano's Las manos de Dios  

E-print Network

that removes the pathos from tragedy. M. H. Abrams explains in Natural Supernaturalism: . . . paganism is hopeless, but Christianity gives man hope. . . . Despite its emphasis on a lost paradise in the distant past, and however thoroughgoing the contempt... Solrzano, in Las manos de Dios, seeks to break away from what he perceives to be the dead ritual of Latin American Christianity by using the theatre to reawaken the audience to the human ritual associated with the desire for freedom. Interestingly...

Rosenberg, John R.

1984-04-01

122

V Encuentro de Mujeres de Iberoamrica en las Arts Escnicas  

E-print Network

muestra una realidad donde las frustraciones saltan como chispas. Son mujeres campesinas que entre la risa y la amargura dibujan una tela llena de energa que huele a hierba. El libro Pintadas por s mismas, basado en una investigacin realizada en... de Teatro del INAEN - Cristina Santolaria Instituto de la Mujer - Mariano Alvaro Fundacin Iberautor - Ignacio Armada Margarita Borja - Coordinadora del Evento Fundacin Municipal de la Mujer de Cdiz Festival Internacional de Teatro de Sitges...

Ortega, Isabel

2002-10-01

123

UNIVERSITY OF NEVADA, LAS VEGAS School of Social Work  

E-print Network

UNIVERSITY OF NEVADA, LAS VEGAS School of Social Work SWK 410.2 & SWK 410.2S Professor: Margaret Oakes, Ph.D. SOCIAL WORK PRACTICE I LCSW (Ca.), LMSW-ACP (Tx) Sprin 2003 Office Hours: Mon. 1:30-2:30, 5.M. Or by appointment Credits: 3 Email: moakes@ccmail.nevada.edu Tel: (702) 895-1222 COURSE DESCRIPTION Social Work

Ahmad, Sajjad

124

Propiedades topologicas basicas de las cubiertas ramificadas de Fox  

E-print Network

Propiedades topol´ogicas b´asicas de las cubiertas ramificadas de Fox Jos´e Mar´ia MONTESINOS Outerelo Dom´inguez con motivo de su jubilaci´on. ABSTRACT The fundaments of Fox's branched covering theory valiosas sugerencias. 1. Introducci´on En la ´epoca en que Ralph H. Fox, profesor a la saz´on de la

Ruiz, Jesús M.

125

Peptidoglycan amidase MepA is a LAS metallopeptidase.  

PubMed

LAS enzymes are a group of metallopeptidases that share an active site architecture and a core folding motif and have been named according to the group members lysostaphin, D-Ala-D-Ala carboxypeptidase and sonic hedgehog. Escherichia coli MepA is a periplasmic, penicillin-insensitive murein endopeptidase that cleaves the D-alanyl-meso-2,6-diamino-pimelyl amide bond in E. coli peptidoglycan. The enzyme lacks sequence similarity with other peptidases, and is currently classified as a peptidase of unknown fold and catalytic class in all major data bases. Here, we build on our observation that two motifs, characteristic of the newly described LAS group of metallopeptidases, are conserved in MepA-type sequences. We demonstrate that recombinant E. coli MepA is sensitive to metal chelators and that mutations in the predicted Zn2+ ligands His-113, Asp-120, and His-211 inactivate the enzyme. Moreover, we present the crystal structure of MepA. The active site of the enzyme is most similar to the active sites of lysostaphin and D-Ala-D-Ala carboxypeptidase, and the fold is most closely related to the N-domain of sonic hedgehog. We conclude that MepA-type peptidases are LAS enzymes. PMID:15292190

Marcyjaniak, Malgorzata; Odintsov, Sergey G; Sabala, Izabela; Bochtler, Matthias

2004-10-15

126

Source Water Assessment for the Las Vegas Valley Surface Waters  

NASA Astrophysics Data System (ADS)

The 1996 amendment to the Safe Drinking Water Act of 1974 created the Source Water Assessment Program (SWAP) with an objective to evaluate potential sources of contamination to drinking water intakes. The development of a Source Water Assessment Plan for Las Vegas Valley surface water runoff into Lake Mead is important since it will guide future work on source water protection of the main source of water. The first step was the identification of the watershed boundary and source water protection area. Two protection zones were delineated. Zone A extends 500 ft around water bodies, and Zone B extends 3000 ft from the boundaries of Zone A. These Zones extend upstream to the limits of dry weather flows in the storm channels within the Las Vegas Valley. After the protection areas were identified, the potential sources of contamination in the protection area were inventoried. Field work was conducted to identify possible sources of contamination. A GIS coverage obtained from local data sources was used to identify the septic tank locations. Finally, the National Pollutant Discharge Elimination System (NPDES) Permits were obtained from the State of Nevada, and included in the inventory. After the inventory was completed, a level of risk was assigned to each potential contaminating activity (PCA). The contaminants of concern were grouped into five categories: volatile organic compounds (VOCs), synthetic organic compounds (SOCs), inorganic compounds (IOCs), microbiological, and radionuclides. The vulnerability of the water intake to each of the PCAs was assigned based on these five categories, and also on three other factors: the physical barrier effectiveness, the risk potential, and the time of travel. The vulnerability analysis shows that the PCAs with the highest vulnerability rating include septic systems, golf courses/parks, storm channels, gas stations, auto repair shops, construction, and the wastewater treatment plant discharges. Based on the current water quality data (prior to treatment), the proximity of Las Vegas Wash to the intake, and the results of the vulnerability analysis of potential contaminating activities, it is determined that the drinking water intake is at a Moderate level of risk for VOC, SOC, and microbiological contaminants. The drinking water intake is at a High level of risk for IOC contaminants. Vulnerability to radiological contamination is Moderate. Source water protection in the Las Vegas Valley is strongly encouraged because of the documented influence of the Las Vegas Wash on the quality of the water at the intake.

Albuquerque, S. P.; Piechota, T. C.

2003-12-01

127

El Cid de las Mocedades El tema de esta ponencia ser una interpretacin histrica del Cid de las  

E-print Network

tenía que ver la alusión del título provisional de mi ponencia a los linajes de las Tierras de Campos organiza el significado de la obra. ?sta es la célula común : la descendencia de Laín Calvo, antepasado Mendoza. La genealogía cidiana encabezada por Laín Calvo da además a Rodrigo un hermano bastardo

Paris-Sud XI, Université de

128

Qu puedo encontrar Todas las monografas, ttulos de revistas en papel y material multimedia existentes en las bibliotecas de  

E-print Network

Repositorio de la UA (RUA) y de otros repositorios mundiales Los libros electrónicos adquiridos por la UA. Las contratadas por la UA. Libros Electrónicos La referencia bibliográfica de los libros electrónicos existentes completo a los libros de la colección de la UA Bases de datos La opción de búsqueda simultánea en World

Escolano, Francisco

129

Instantnea de los cnceres de hgado y de las vas biliares  

Cancer.gov

Informacin sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cnceres de hgado y de las vas biliares; as como ejemplos de actividades del NCI y adelantos en la investigacin de estos tipos de cncer.

130

1 University of Nevada, Las Vegas University of Nevada,  

E-print Network

of any race 22 9.6 21 11.3 30 10 13 11.3 12 10.5 43 10.3 19 Black or African American 13 5.7 12 6.5 12 4 of Nevada, Las Vegas - 2013 Standard 509 Information Report 4505 S. Maryland Parkway Box 451003 12312312.2 43 37.4 39 34.2 134 32.2 45 Two or more races 2 0.9 5 2.7 6 2 1 0.9 7 6.1 7 1.7 0 Native Hawaiian

Hemmers, Oliver

131

Las fulguraciones como manifestacin de reconexin en el campo magntico solar  

NASA Astrophysics Data System (ADS)

Las fulguraciones solares son fenmenos transitorios de liberacin de energa que se desarrollan en las estructuras magnticas de las regiones activas del Sol. Las fulguraciones pueden llegar a liberar hasta 1032 erg en 100 seg. en todo el rango electromagntico, y acelerar partculas. En este trabajo mostramos que la ubicacin de los abrillantamientos en H? de diversas fulguraciones est relacionado con las propiedades de las conexiones de las lneas del campo magntico de la regin, como se espera por las teoras de reconexin en 3D recientemente desarrolladas (Dmoulin et al, 1996a). El campo magntico coronal se extrapola del campo fotosfrico observado suponiendo una configuracin libre de fuerzas lineal. Por medio de un algoritmo se determinan las regiones donde existe un cambio drstico en la conectividad de las lneas de campo (lmites ``cuasi-discontinuos'', o cuasi-separatrices CS). Las CS son bandas abiertas que identifican zonas donde el campo magntico se reconectar con ms probabilidad y, siempre que las mismas sean lo suficientemente finas, se producir allla liberacin de energa proveniente del campo magntico. Hemos encontrado que en todas las regiones fulgurantes estudiadas (Dmoulin et al, 1996b) existen CS en los mismos lugares donde se observaron los abrillantamientos en H?. Alldonde coinciden los abrillantamientos con las CS, stas tienen un espesor menor que 1 Mm. Las lneas de campo coronales extrapoladas de nuestro modelo tienen sus orgenes fotosfricos a ambos lados de las CS, como se espera dados los recientes estudios de reconexin magntica en 3D. Estos resultados ponen a prueba los modelos presentes sobre fulguraciones solares.

Bagal, L. G.; Mandrini, M. C.; Rovira, M. G.; Dmoulin, P.

132

Determinantes de las respuestas a vacunas orales en pases en vas de desarrollo  

Microsoft Academic Search

ExtractoLas vacunas orales que se han diseado para uso global no inducen necesariamente las mismas respuestas inmunitarias en todos los nios de todo el mundo. De hecho, varias vacunas inducen a menudo respuestas medias de anticuerpos menos frecuentes y menores en nios en pases en vas de desarrollo, lo que permite suponer que las vacunas pueden producir un efecto menos

David A. Sack; Firdausi Qadri; Ann-Mari Svennerholm

2008-01-01

133

Dos mdicos y una causa: Len Crome y Reginald Saxton en las Brigadas Internacionales  

Microsoft Academic Search

Una de las dimensiones ms impresionantes, ms duraderas y menos conocidas de las Brigadas Internacionales era la aportacin de sus servidos mdicos. Las aportaciones de los distintos mdicos, espaoles e internacionales, fueron de una importancia colosal en el desarrollo posterior de la medicina traumatolgica, en guerra y en paz. Menos conocida fue la labor abnegada de conductores de ambulancias, enfermeras

Paul Preston

2004-01-01

134

CONVOCATORIADECARTELES(CITUPAS) 2012 SESIN DE CARTELES. Se deben tener en cuenta las siguientes normas  

E-print Network

CONVOCATORIADECARTELES(CITUPAS) 2012 1 SESI?N DE CARTELES. Se deben tener en cuenta las.Los carteles serán expuestos desde las 9:00 horas hasta las 19 horas, y deberán ser resguardados en la sala audiovisual al final de la jornada. 3. Los carteles a exponer el jueves 29 y viernes 30 de

135

Responsabilidad en la gestin de los programas gubernamentales de fomento de las pequeas y medianas empresas  

Microsoft Academic Search

Un posible riesgo para la eficiencia de las instituciones que fomentan el desarrollo de las pequeas y medianas empresas (pyme) en Amrica Latina es que sus programas se conviertan en organismos clientelistas y antepongan intereses ajenos a la prosperidad de estas empresas. No obstante, como los gobier- nos latinoamericanos han adoptado polticas ms orientadas al mercado, las instituciones gubernamentales de

Mario Castillo; Roy C. Nelson

136

LA REFORMA POLTICA EN MXICO Y SU IMPACTO EN LAS INSTITUCIONES EDUCATIVAS.  

E-print Network

configuraciones de las estructuras sociales y sus instituciones, el sector educativo constituye uno de los económica, implicaron al mismo tiempo modificaciones en las estructuras básicas del sistema que, implicó cambios en las estructuras del sistema superior y de los imaginarios sociales que han impactado en

Paris-Sud XI, Université de

137

Fate and effects of linear alkylbenzene sulphonates (LAS) in the terrestrial environment  

Microsoft Academic Search

Linear alkylbenzene sulphonates (LAS) are a group of anionic surfactants, characterised by having both a hydrophobic and a hydrophilic group. LAS is one of the major ingredients of synthetic detergents and surfactants and is used world-wide for both domestic and industrial applications. LAS is relatively rapidly aerobically degraded, but only very slowly or not at all degraded under anaerobic conditions.

John Jensen

1999-01-01

138

O R E G O N Informe Final Sobre el Estudio de las  

E-print Network

WASHINGTON O R E G O N IDAHO HANFORD Resumen del Informe Final Sobre el Estudio de las Enfermedades de la Tiroides en Hanford Acerca del Estudio Sobre las Enfermedades de la Tiroides en Hanford. (HTDS por su sigla en inglés) El estudio sobre las enfermedades de la tiroides en Hanford (HTDS por su sigla

139

Mecanismos de Acci³n de las Auxinas y los Herbicidas Aux­nicos  

NSDL National Science Digital Library

Se muestra como las auxinas y los herbicidas aux­nicos pueden inducir respuestas celulares y se describe el transporte bas­peto de las auxinas. Tambi©n se muestra como los receptores de auxinas reconocen las auxinas y los herbicidas aux­nicos, los cuales inducen entonces la transmisi³n y traducci³n de se±ales para activar varios genes; el papel de los productos de esos genes en las respuestas de las plantas es tambi©n mostrado.

140

Persisten las diferencias de cncer de seno en hispanas con el mismo acceso a la atencin mdica  

Cancer.gov

Con el mismo acceso a servicios mdicos, persisten las diferencias en cuanto al tamao, el estadio y el grado del cncer de seno en las mujeres hispanas en comparacin con las mujeres blancas no hispanas.

141

El influjo de la Historia Roderici sobre el Libro de las generaciones y linajes de los reyes  

E-print Network

El influjo de la Historia Roderici sobre el Libro de las generaciones y coloquio parisino de 2009, nos referimos como Libro de las generaciones y linajes interviene al final del Libro de las generaciones y linajes de los reyes

Paris-Sud XI, Université de

142

PTIMO DE COBERTURA VEGETAL EN RELACIN A LAS PRDIDAS DE SUELO POR EROSIN HDRICA Y LAS PRDIDAS DE LLUVIA POR INTERCEPTACIN  

Microsoft Academic Search

RESUMEN Se establece, en una primera aproximacin, el ptimo de cobertura en funcin de las pr- didas de suelo por erosin hdrica y de las prdidas de lluvia por interceptacin, en un mato- rral (romeral), en condiciones ambientales semiridas mediterrneas, con un mismo tipo de suelo y dos tramos de pendiente de ladera, 11% y 25%. Se utiliza el promedio

Belmonte Serrato; Romero Daz; Lpez Bermdez; E. Hernndez Laguna

143

Elementos de poltica, riesgos ante el cambio climtico, complementariedad entre las FNCE y el sin, y costos indicativos de las FNCE  

Microsoft Academic Search

En este documento se presentan y analizan las experiencias internacionales en polticas para el desarrollo de las FNCE en la Unin Europea y en varios pases de la Unin (Alemania, Espaa y Croacia). Tambin se presentan y analizan estas experiencias en varios pases de Amrica Latina (Mjico, Per y Brasil). En el captulo tercero, se analizan elementos de poltica en

Ernesto Torres; Jos Maria Rincn; Edinson Lozano

2011-01-01

144

Proteus in flight over mountains near Las Cruces, New Mexico.  

NASA Technical Reports Server (NTRS)

The unique Proteus aircraft served as a test bed for NASA-sponsored flight tests designed to validate collision-avoidance technologies proposed for uninhabited aircraft. The tests, flown over southern New Mexico in March, 2002, used the Proteus as a surrogate uninhabited aerial vehicle (UAV) while three other aircraft flew toward the Proteus from various angles on simulated collision courses. Radio-based 'detect, see and avoid' equipment on the Proteus successfully detected the other aircraft and relayed that information to a remote pilot on the ground at Las Cruces Airport. The pilot then transmitted commands to the Proteus to maneuver it away from the potential collisions. The flight demonstration, sponsored by NASA Dryden Flight Research Center, New Mexico State University, Scaled Composites, the U.S. Navy and Modern Technology Solutions, Inc., were intended to demonstrate that UAVs can be flown safely and compatibly in the same skies as piloted aircraft.

2002-01-01

145

Proteus aircraft over Las Cruces International Airport in New Mexico.  

NASA Technical Reports Server (NTRS)

The unique Proteus aircraft served as a test bed for NASA-sponsored flight tests designed to validate collision-avoidance technologies proposed for uninhabited aircraft. The tests, flown over southern New Mexico in March, 2002, used the Proteus as a surrogate uninhabited aerial vehicle (UAV) while three other aircraft flew toward the Proteus from various angles on simulated collision courses. Radio-based 'detect, see and avoid' equipment on the Proteus successfully detected the other aircraft and relayed that information to a remote pilot on the ground at Las Cruces Airport. The pilot then transmitted commands to the Proteus to maneuver it away from the potential collisions. The flight demonstration, sponsored by NASA Dryden Flight Research Center, New Mexico State University, Scaled Composites, the U.S. Navy and Modern Technology Solutions, Inc., were intended to demonstrate that UAVs can be flown safely and compatibly in the same skies as piloted aircraft.

2002-01-01

146

Proteus aircraft low-level flyby at Las Cruces Airport.  

NASA Technical Reports Server (NTRS)

The unique Proteus aircraft served as a test bed for NASA-sponsored flight tests designed to validate collision-avoidance technologies proposed for uninhabited aircraft. The tests, flown over southern New Mexico in March, 2002, used the Proteus as a surrogate uninhabited aerial vehicle (UAV) while three other aircraft flew toward the Proteus from various angles on simulated collision courses. Radio-based 'detect, see and avoid' equipment on the Proteus successfully detected the other aircraft and relayed that information to a remote pilot on the ground at Las Cruces Airport. The pilot then transmitted commands to the Proteus to maneuver it away from the potential collisions. The flight demonstration, sponsored by NASA Dryden Flight Research Center, New Mexico State University, Scaled Composites, the U.S. Navy and Modern Technology Solutions, Inc., were intended to demonstrate that UAVs can be flown safely and compatibly in the same skies as piloted aircraft.

2002-01-01

147

Elastase LasB of Pseudomonas aeruginosa promotes biofilm formation partly through rhamnolipid-mediated regulation.  

PubMed

Elastase LasB, an important extracellular virulence factor, is shown to play an important role in the pathogenicity of Pseudomonas aeruginosa during host infection. However, the role of LasB in the life cycle of P. aeruginosa is not completely understood. This report focuses on the impact of LasB on biofilm formation of P. aeruginosa PAO1. Here, we reported that the lasB deletion mutant (?lasB) displayed significantly decreased bacterial attachment, microcolony formation, and extracellular matrix linkage in biofilm associated with decreased biosynthesis of rhamnolipids compared with PAO1 and lasB complementary strain (?lasB(+)). Nevertheless, the ?lasB developed restored biofilm formation with supplementation of exogenous rhamnolipids. Further gene expression analysis revealed that the mutant of lasB could result in the downregulation of rhamnolipid synthesis at the transcriptional level. Taken together, these results indicated that LasB could promote biofilm formation partly through the rhamnolipid-mediated regulation. PMID:24693981

Yu, Hua; He, Xiaomei; Xie, Wei; Xiong, Junzhi; Sheng, Halei; Guo, Shaodong; Huang, Chunji; Zhang, Di; Zhang, Kebin

2014-04-01

148

City of Las Vegas Plug-in Hybrid Electric Vehicle Demonstration Program  

SciTech Connect

The City of Las Vegas was awarded Department of Energy (DOE) project funding in 2009, for the City of Las Vegas Plug-in Hybrid Electric Vehicle Demonstration Program. This project allowed the City of Las Vegas to purchase electric and plug-in hybrid electric vehicles and associated electric vehicle charging infrastructure. The City anticipated the electric vehicles having lower overall operating costs and emissions similar to traditional and hybrid vehicles.

None

2013-12-31

149

9 (juin 2010) Le Liber regum (ou Libro de las generaciones y linajes de los reyes)  

E-print Network

e-Spania 9 (juin 2010) Le Liber regum (ou Libro de las generaciones y linajes de los reyes) ................................................................................................................................................................................................................................................................................................ Hélène THIEULIN-PARDO Reflexiones en torno a una edición digital del Liber regum (o Libro de las (o Libro de las generaciones y linajes de los reyes) », e-Spania [En ligne], 9 | juin 2010, mis en

Paris-Sud XI, Université de

150

Atmospheric Radioxenon Measurements in North Las Vegas, NV  

SciTech Connect

PNNL deployed the ARSA radioxenon measurement system in North Las Vegas for two weeks in February and March 2006 for the purpose of measuring the radioxenon background at a level of sensitivity much higher than previously done in the vicinity of the NTS. The measurements establish what might be expected if future measurements are taken at NTS itself. The measurements are also relevant to test site readiness. A second detector, the PEMS, built and operated by DRI, was deployed in conjunction with the ARSA and contained a PIC, aerosol collection filters, and meteorological sensors. Originally, measurements were also to be performed at Mercury, NV on the NTS, but these were canceled due to initial equipment problems with the ARSA detector. Some of the radioxenon measurements detected 133Xe at levels up to 3 mBq/m3. This concentration of radioxenon is consistent with the observation of low levels of radioxenon emanating from distance nuclear reactors. Previous measurements in areas of high nuclear reactor concentration have shown similar results, but the western US, in general, does not have many nuclear reactors. Measurements of the wind direction indicate that the air carrying the radioxenon came from south of the detector and not from the NTS.

Milbrath, Brian D.; Cooper, Matthew W.; Lidey, Lance S.; Bowyer, Ted W.; Hayes, James C.; McIntyre, Justin I.; Karr, L.; Shafer, D.; Tappen, J.

2006-07-31

151

Loose Groups of Galaxies in the Las Campanas Redshift Survey  

E-print Network

A ``friends-of-friends'' percolation algorithm has been used to extract a catalogue of dn/n = 80 density enhancements (groups) from the six slices of the Las Campanas Redshift Survey (LCRS). The full catalogue contains 1495 groups and includes 35% of the LCRS galaxy sample. A clean sample of 394 groups has been derived by culling groups from the full sample which either are too close to a slice edge, have a crossing time greater than a Hubble time, have a corrected velocity dispersion of zero, or contain a 55-arcsec ``orphan'' (a galaxy with a mock redshift which was excluded from the original LCRS redshift catalogue due to its proximity to another galaxy -- i.e., within 55 arcsec). Median properties derived from the clean sample include: line-of-sight velocity dispersion sigma_los = 164km/s, crossing time t_cr = 0.10/H_0, harmonic radius R_h = 0.58/h Mpc, pairwise separation R_p = 0.64/h Mpc, virial mass M_vir = (1.90x10^13)/h M_sun, total group R-band luminosity L_tot = (1.30x10^11)/h^2 L_sun, and R-band mass-to-light ratio M/L = 171h M_sun/L_sun; the median number of observed members in a group is 3.

D. L. Tucker; A. Oemler; Y. Hashimoto; S. A. Shectman; R. P. Kirshner; H. Lin; S. D. Landy; P. L. Schechter; S. S. Allam

2000-06-11

152

PENERBAHE 4 A1 20/04/12 a las 14:00h PENERBAHE  

E-print Network

FONDO SUR PENERBAH?E 4º A1 20/04/12 a las 14:00h PENERBAH?E SPARTA DE RISA ASTON TERIAS 26/04/12 a las 13:00h Ganadors de 4º A1 vs A2 SPARTA DE RISA SEMIFINAL- A1 20/04/12 a las 15:00h SPARTA DE RISA - A P-1 P-2 P-3 P-4 P-5 P-6 P-7 P-8 #12;4º B1 P-1 PENERBAH?E P-2 SPARTA DE RISA 27/04/12 a las 14:00h

153

Relaciones entre lo sucedido en la dcada y las nuevas tendencias teatrales  

E-print Network

1983, el costo de vida aument en un 430%. La deuda externa pas a 43,000 millones de dlares. Las Madres de Plaza de Mayo y otras entidades denunciaban 30,000 desaparecidos. Se estiman en 2,100,000 los argentinos que viven en el exterior. Asume...SPRING 1991 23 Relaciones entre lo sucedido en la dcada y las nuevas tendencias teatrales Eduardo Rovner Me propongo hurgar, ms que en las relaciones entre lo sucedido en los '80 y los discursos de las obras estrenadas en la dcada, en lo...

Rovner, Eduardo

1991-04-01

154

Identification of methyl triclosan and halogenated analogues in male common carp ( Cyprinus carpio) from Las Vegas Bay and semipermeable membrane devices from Las Vegas Wash, Nevada  

Microsoft Academic Search

Methyl triclosan and four halogenated analogues have been identified in extracts of individual whole-body male carp (Cyprinus carpio) tissue that were collected from Las Vegas Bay, Nevada, and Semipermeable Membrane Devices (SPMD) that were deployed in Las Vegas Wash, Nevada. Methyl triclosan is believed to be the microbially methylated product of the antibacterial agent triclosan (2, 4, 4'-trichloro-4-hydroxydiphenyl ether, Chemical

Thomas J. Leiker; Sonja R. Abney; Steven L. Goodbred; Michael R. Rosen

2009-01-01

155

Managing Floods and Resources at the Arroyo Las Positas  

SciTech Connect

Engineers and water resource professionals are challenged with protecting facilities from flood events within environmental resource protection, regulatory, and economic constraints. One case in point is the Arroyo Las Positas (ALP), an intermittent stream that traverses the Lawrence Livermore National Laboratory (LLNL) in Livermore, California. Increased runoff from post-drought rainfall, upstream development, and new perennial discharges from LLNL activities have resulted in increased dry weather flows and wetland vegetation. These new conditions have recently begun to provide improved habitat for the federally threatened California red-legged frog (Rana aurora draytonii; CRLF), but the additional vegetation diminishes the channel's drainage capacity and increases flood risk. When LLNL proposed to re-grade the channel to reestablish the 100-year flood capacity, traditional dredging practices were no longer being advocated by environmental regulatory agencies. LLNL therefore designed a desilting maintenance plan to protect LLNL facility areas from flooding, while minimizing impacts to wetland resources and habitat. The result was a combination of structural upland improvements and the ALP Five Year Maintenance Plan (Maintenance Plan), which includes phased desilting in segments so that the entire ALP is desilted after five years. A unique feature of the Maintenance Plan is the variable length of the segments designed to minimize LLNL's impact on CRLF movement. State and federal permits also added monitoring requirements and additional constraints on desilting activities. Two years into the Maintenance Plan, LLNL is examining the lessons learned on the cost-effectiveness of these maintenance measures and restrictions and reevaluating the direction of future maintenance activities.

Sanchez, L; Van Hattem, M; Mathews, S

2002-03-05

156

Estudio del razonamiento lgico-matemtico desde el modelo de las inteligencias mltiples  

Microsoft Academic Search

Resumen: El objetivo del trabajo es estudiar el razonamiento lgico- matemtico de una muestra de alumnos de educacin infantil y primaria. Se disear el perfil cognitivo de los participantes en las distintas inteligen- cias, se estudiar la relacin entre la inteligencia lgico-matemtica en el modelo de Gardner y la inteligencia valorada desde una perspectiva psico- mtrica; finalmente, se establecern las

Carmen Ferrndiz; Rosario Bermejo; Marta Sainz; Mercedes Ferrando; Maria Dolores Prieto

2008-01-01

157

INTERNET 2 : Las nuevas redes del futuro Juan Manuel Torres Moreno  

E-print Network

INTERNET 2 : Las nuevas redes del futuro Juan Manuel Torres Moreno Laboratorio Nacional de más virtual) pero aún mas impactante: la revolución de las redes de computadoras. Internet ha supuesto vistas. Internet constituye al mismo tiempo un mecanismo de difusión mundial, de propagación, interacción

Avignon et des Pays de Vaucluse, Université de

158

Pollution Affecting Las Vegas Wash, Lake Mead, and the Lower Colorado River, Nevada, Arizona, California.  

National Technical Information Service (NTIS)

Direct and indirect discharges of municipal and industrial wastes to Las Vegas Wash from sources in Las Vegas Valley, Nevada, are causing interstate pollution of Lake Mead and the Lower Colorado River which is deleterious to the health or welfare of perso...

1971-01-01

159

The Las Vegas Wash: A Changing Urban Commons in a Changing Urban Context  

Microsoft Academic Search

The Las Vegas Wash, a 12-mile natural wash, provides the primary drainage for Las Vegas, NV, the fastest growing metropolitan area in the U.S. Sewage effluent from three treatment plants, resurfacing groundwater, and stormwater travel through the wash to Lake Mead. The population of the drainage area has grown from a few people at the turn of the century, to

Krystyna A. Stave; Lesley R. Armijo

2000-01-01

160

Universidades regionales y la sociedad de aprendizaje: funciones e influencia en las polticas y prcticas educativas  

Microsoft Academic Search

Las funciones de las universidades regionales no se deben infravalorar en cuanto a su influencia (econmica, poltica, social y cultural) dentro de cada regin. Este estudio analiza una universidad regional y se sirve de esa institucin como ejemplo para ilustrar tanto la influencia de la universidad en la regin, como el impacto que la universidad regional ha podido ejercer en

Margarita Pavlova; Mark Gurevich

2007-01-01

161

LAS COMPOSICIONES FONTICAS DE AGUSTN GONZLEZ ACILU EN EL CONTEXTO DE LA MSICA ESPAOLA CONTEMPORNEA  

Microsoft Academic Search

En el marco de la llamada composicin fontica o lingstica (Sprachkomposition), que se desarroll como consecuencia de la descomposicin serial y floracin de las tendencias tmbricas y aleatorias en la msica occidental, surgieron en Espaa numerosas obras cuyo objetivo era explotar las potencialidades acsticas, tmbricas y mmicas del lenguaje. Una posicin destacada ocupa la obra de Agustn Gonzlez Acilu (Alsasua,

Jos Mara Garca Laborda

1994-01-01

162

ANLISIS DE LAS FUNCIONES DEL PROFESORADO UNIVERSITARIO Y SUS LIMITACIONES PARA REALIZAR INVESTIGACIN  

Microsoft Academic Search

Resumen: El trabajo que se presenta indaga las funciones del profesorado universitario, as como las causas y limitaciones para realizar investigacin en la Universidad Tecnolgica de San Juan del Ro, Quertaro, Mxico. El profesorado universitario debe atender a tres funciones representativas de esta profesin: la docencia y tutora, la investigacin y la gestin. Se emple una metodologa descriptiva, mediante la

Marco Antonio Zamora Antuano; Jess Salvador; Zamora Aboytes; Jos Antonio Cano Lpez

163

EVOLUCION DEL TURISMO HOTELERO EN LAS REGIONES ESPAOLAS, 2001-2008  

Microsoft Academic Search

Analizamos la evolucin del turismo hotelero en el perodo 2001-2008, en las regiones y provincias espaolas, utilizando las estadsticas de pernoctaciones hoteleras como indicador. Presentamos una sntesis de resultados de varios modelos economtricos del turismo regional en Espaa, tanto en lo que respecta a los factores que influyen en el desarrollo turstico como al impacto que el turismo tiene en

M. C. Guisan; E. Aguayo

2008-01-01

164

Anaerobic bioprocessing of sewage sludge, focusing on degradation of linear alkylbenzene sulfonates (LAS)  

Microsoft Academic Search

Anaerobic degradation of sludge amended with linear alkylbenzene sulfonates (LAS) was tested in a one stage continuous stirred tank reactor (CSTR) and a two stage reactor system consisting of a CSTR as first step and upflow anaerobic sludge bed (UASB) reactor as the second step. Anaerobic removal of LAS was only observed at the second step but not at the

I. Angelidaki; L. Torng; C. M. Waul; J. E. Schmidt

165

La Noche de las Brujas Module. Nivel Primario. [The Night of the Witches Module. Primary Level.  

ERIC Educational Resources Information Center

La Noche de las Brujas (Halloween) is the topic of this primary level unit. The objectives are to enable the child to: (1) draw scenery, using his imagination, about witches, castles, and devils; (2) write compositions on witches, devils, and Halloween; (3) explain the story "La Noche de las Brujas"; (4) tell about any adventures or incidents he

Espinoza, Delia

166

La Gaceta de la RSME, Vol. 00 (0000), Num. 0, Pags. 117 1 Las Medallas Fields  

E-print Network

de Leovigildo Alonso Tarr´io y Ana Jerem´ias L´opez Este a~no el premio Abel ha reca´ido sobre el miembro extranjero de la Academia Nacional de las Ciencias de U.S., de la Academia Americana de las Artes

Guijarro, Luis

167

De la Burguesa a las Elites, entre la ambigedad y la renovacin conceptual  

Microsoft Academic Search

El artculo estudia cmo la teora general de las elites llega a la historiografa espaola ms por su contexto ideolgico que por su contenido terico. Seala los rasgos fundamentales de la teora de las elites que no perviven en el manejo actual del vocablo y aquellos que s lo hacen. El concepto elite encubre frecuentemente eclecticismo ideolgico, pobreza terica y

Pedro Carasa

2001-01-01

168

Posibles implicaciones de la legalizacin del consumo, Produccin y comercializacin de las drogas en Colombia  

Microsoft Academic Search

Como reaccin ante el aparente fracaso de la estrategia represiva de lucha contra las drogas ilcitas y debido al incremento considerable del conflicto en Colombia, el debate sobre las bondades y males de la legalizacin ha cobrado especial inters en el pas. Propuestas provenientes de distintos sectores sociales, polticos y acadmicos coinciden en que para desincentivar el negocio del narcotrfico,

Andrs VERGARA BALLEN; Yilberto LAHUERTA PERCIPIANO; Sandra Patricia CORREA

2003-01-01

169

Territorios, ilegalidades y soberanas de los estados-nacin en torno de las drogas  

Microsoft Academic Search

Una de las cuestiones que el fenmeno del narcotrfico ha puesto en evidencia, es que la transnacionalizacin de las drogas forma parte intrnseca de la globalizacin. Pero su ilegalidad no es algo extrao a la lgica del mercado y los estados-nacin; se construyen paralelamente, lo que nos hace pensar que los Estados no son absolutos, acabados y omnipresentes como dicen

Salvador Maldonado Aranda

2009-01-01

170

II Semana Cultural: Cuando las culturas se encuentran. Multiculturalismo y sociedad. El dilogo del siglo XX  

E-print Network

II Semana Cultural: Cuando las culturas se encuentran. Multiculturalismo y sociedad. El diálogo del Universidad con respecto a ese encuentro entre culturas. Como punto de partida de las reacciones a que esos cultura? ¿Cuál es el origen del encuentro de culturas?. ¿Qué ocurre cuando varios grupos sociales

Escolano, Francisco

171

Savater y Recalde conferencian en las IX Jornadas de Derecho penal, Derecho penitenciario y Criminologa  

E-print Network

Savater y Recalde conferencian en las IX Jornadas de Derecho penal, Derecho penitenciario y conferencias que se han expuesto en el segundo día de las IX Jornadas de Derecho penal, Derecho penitenciario y Ortega y el posterior seminario-debate con los profesores del Área de Derecho Penal. DIRECCI?N POSTAL

Escolano, Francisco

172

Learning Assistance Service Making an Appointment with Learning Assistance Service (LAS)  

E-print Network

Learning Assistance Service Making an Appointment with Learning Assistance Service (LAS) To schedule an appointment in LAS, visit https://lasonline.umd.edu or visit the Learning Assistance Service Counseling Math Learning ESOL/International Peer Assisted Learning Section: Choose the reason you

Li, Teng

173

Programacin Paralela y Computacin de Altas Prestaciones  

E-print Network

/javiercm/ejemplos_algmatbas #12;Tipos de matrices Cuadradas Rectangulares Vectores columnas n filas n n m n n 1 1 #12;Tipos de Triangulares Tridiagonal Simétrica Cada elemento de la fila i columna j (aij) igual al de la columna i fila j: double a[n][m] En array unidimensional: double *b[n*m] Fila i columna j: a[i][j] , b[i*m+j] Cuando es

Giménez, Domingo

174

27 CFR 9.195 - Alta Mesa.  

Code of Federal Regulations, 2012 CFR

...follows: (1) The beginning point is on the Lodi North map...Road and the Southern Pacific railway, section 34, T5N, R6E. From the beginning point, proceed north-northwest...along the Southern Pacific railway to its intersection...

2012-04-01

175

27 CFR 9.195 - Alta Mesa.  

Code of Federal Regulations, 2013 CFR

...follows: (1) The beginning point is on the Lodi North map...Road and the Southern Pacific railway, section 34, T5N, R6E. From the beginning point, proceed north-northwest...along the Southern Pacific railway to its intersection...

2013-04-01

176

27 CFR 9.195 - Alta Mesa.  

Code of Federal Regulations, 2011 CFR

...follows: (1) The beginning point is on the Lodi North map...Road and the Southern Pacific railway, section 34, T5N, R6E. From the beginning point, proceed north-northwest...along the Southern Pacific railway to its intersection...

2011-04-01

177

27 CFR 9.195 - Alta Mesa.  

...follows: (1) The beginning point is on the Lodi North map...Road and the Southern Pacific railway, section 34, T5N, R6E. From the beginning point, proceed north-northwest...along the Southern Pacific railway to its intersection...

2014-04-01

178

The vitamin riboflavin and its derivative lumichrome activate the LasR bacterial quorum sensing receptor  

PubMed Central

Many bacteria use quorum sensing (QS) as an intercellular signaling mechanism to regulate gene expression in local populations. Plant and algal hosts, in turn, secrete compounds that mimic bacterial QS signals, allowing these hosts to manipulate QS-regulated gene expression in bacteria. Lumichrome, a derivative of the vitamin riboflavin, was purified and chemically identified from culture filtrates of the alga Chlamydomonas as a QS signal-mimic compound capable of stimulating the Pseudomonas aeruginosa LasR QS receptor. LasR normally recognizes the N-acyl homoserine lactone (AHL) signal, N-3-oxo-dodecanoyl homoserine lactone (3-oxo-C12-HSL). Authentic lumichrome and riboflavin stimulated the LasR receptor in bioassays, and lumichrome activated LasR in gel shift experiments. Amino acid substitutions in LasR residues required for AHL binding altered responses to both AHLs and lumichrome/riboflavin. These results and docking studies indicate that the AHL binding pocket of LasR recognizes both AHLs and the structurally dissimilar lumichrome/riboflavin. Bacteria, plants and algae commonly secrete riboflavin and/or lumichrome, raising the possibility that these compounds could serve as either QS signals or as interkingdom signal-mimics capable of manipulating QS in bacteria with a LasR-like receptor. PMID:18700823

Rajamani, Sathish; Bauer, Wolfgang D.; Robinson, Jayne B.; Farrow, John M.; Pesci, Everett C.; Teplitski, Max; Gao, Mengsheng; Sayre, Richard T.; Phillips, Donald A.

2013-01-01

179

El fenotipo de las mucinas en el es?fago de Barrett  

PubMed Central

Antecedentes El esfago de Barrett es una reconocida lesin precursora de adenocarcinoma esofgico. Aunque generalmente asociada al reflujo gastroesofgico, los mecanismos patognicos de la enfermedad no son bien conocidos. El objetivo del presente estudio es explorar la historia natural e identificar marcadores de progreso del proceso precanceroso. Material y mtodos Se utilizaron cortes histolgicos de 67 especmenes de esfago correspondientes a 14 pacientes con esfago de Barrett, a los que se sigui entre 1 9 aos. Se clasificaron las lesiones en: esfago de Barrett sin displasia, indefinido para displasia o con displasia. Se evalu la expresin de diferentes mucinas en las clulas caliciformes y en las columnares usando tcnicas de histoqumica e inmunohistoqumica. Resultados En todos los casos se comprob la presencia de metaplasia intestinal incompleta. Las clulas columnares dentro del epitelio metaplsico contenan mucinas neutras. A mayor severidad de la lesin se encontr significativamente menor expresin de sialomucinas en las clulas columnares (p de tendencia igual a 0,03). En sujetos con lesiones indefinidas para displasia se observ un mayor contenido de sulfomucinas en las clulas caliciformes (p=0,034) y de MUC2 en las clulas columnares (p=0,029) que en sujetos con esfago de Barrett sin displasia. Se observ expresin de la mucina intestinal MUC2 y de la mucina gstrica MUC5AC en todas las muestras. MUC6, una mucina de las glndulas profundas gstricas, se present ocasionalmente. Conclusin La evaluacin de los perfiles de mucinas en el esfago de Barrett sugiere una transicin gradual del fenotipo del epitelio metaplsico a medida que la lesin avanza en el tiempo. PMID:21804831

Torrado, Julio; Piazuelo, Maria Blanca; Ruiz, Irune; Izarzugaza, Maria Isabel; Camargo, Maria Constanza; Delgado, Alberto; Abdirad, Afshin; Correa, Pelayo

2011-01-01

180

Report on Pollution Affecting Las Vegas Wash, Lake Mead and the Lower Colorado River, Nevada - Arizona - California.  

National Technical Information Service (NTIS)

Various technical investigations have demonstrated that direct and indirect discharges of municipal and industrial wastes to Las Vegas Wash, an interstate tributary of the Colorado River, from sources in Las Vegas Valley, Nevada, are causing pollution of ...

1971-01-01

181

Las Escrituras del Margen. En Torno a los Territorios Cannicos de la Literatura Latinoamericana  

E-print Network

Las Escrituras del Margen: En torno a los territorios cannicos de la literature contempornea Latinoamericana. Lorenzo Garca Vega, Jorge Gaitn Durn, and Nicols Gmez Dvila, is the study of some works that have been...

Ayarza-Riveros, Luis Carlos

2013-12-09

182

DENTAL CLINIC PROPERTIES FOR SALE OFFERED BY THE UNIVERSITY OF NEVADA, LAS VEGAS  

E-print Network

DENTAL CLINIC PROPERTIES FOR SALE OFFERED BY THE UNIVERSITY OF NEVADA, LAS VEGAS PROPERTY ADDRESSES;818 East Sahara Avenue 864 East Sahara Avenue #12;UNLV School of Dental Medicine Faculty Practice Dental

Hemmers, Oliver

183

Pottery engineering in ancient Guerrero, Mexico : the site of Las Fundiciones  

E-print Network

This thesis examines ancient pottery from the site of Las Fundiciones, Guerrero, Mexico. Because this site provides the only documented evidence of prehispanic metal smelting in Mesoamerica it is critical to examine artifacts ...

Reitzel, Hannah Lynn

2007-01-01

184

Examen cri?tico-anali?tico de las ilustraciones encontradas en tres Celestinas: (Burgos, 1499; Sevilla, 1502; Valencia, 1514)  

E-print Network

PArmeno, los cuales han sido muertos por las autoridades al encontrarlos culpables de matar a la puta vieja. El pilar divisor nuevamente interrumpe las dos escenas: a la derecha Calisto se encuentra solo y con cara de pesadumbre; resultado de la... PArmeno, los cuales han sido muertos por las autoridades al encontrarlos culpables de matar a la puta vieja. El pilar divisor nuevamente interrumpe las dos escenas: a la derecha Calisto se encuentra solo y con cara de pesadumbre; resultado de la...

Reyes-Dura?n, Marti?n

2012-06-07

185

Da 17/01/2014 -11.49h Identifican las sustancias qumicas que las reinas de especies como hormigas, abejas y  

E-print Network

como las abejas, avispas, abejorros y algunas hormigas utilizan la La reina del sexo: por qué solo una puede reproducirse - ABC.es http://www.abc.es/ciencia/20140117/abci-reina-sexo-solo-puede-201... 1 of 3 dificultades que encontró Darwin", La reina del sexo: por qu

Wenseleers, Tom

186

El papado de Pablo IV (1555-1559), las relaciones con Venecia y Espaa y el cambio de orientacin poltico-religiosa de las lites eclesisticas italianas  

E-print Network

el núcleo del entourage del joven emperador (tales el gran canciller Mercurino Gattinara y el 5190, Lyon / Università di Milano Presentamos en este trabajo las principales conclusiones de nuestra tesis, "Il papato di Paolo IV nella crisi politico-religiosa del Cinquecento: le relazioni con la

Paris-Sud XI, Université de

187

Postmodernism and Feminism in Mexican Theatre: Aura y las once mil vrgenes by Carmen Boullosa  

E-print Network

SPRING 1995 55 Postmodernism and Feminism in Mexican Theatre: Aura y las once mil vrgenes by Carmen Boullosa Roselyn Costantino Mexican author Carmen Boullosa (Mexico City, 1954) is one of the most recognized and prolific writers of her... of postmodernism and feminisms. In order to place the study in context, an outline of issues involving the "crisis" of the transition in Mexican society follows. Finally, an analysis of Boullosa's play, Aura y las once mil vrgenes, shows how the author...

Costantino, Roselyn

1995-04-01

188

LAS CRCELES PERUANAS Y SU FICCIONALIZACIN: UNA IMAGEN DEL PER CONTEMPORNEO  

E-print Network

guerras externas y civiles ocurridas en sus 182 años de vida independiente e [...] el 75 por ciento de las", se lee en el Informe de la CVR3 (9). La CVR atribuye la responsabilidad del 54% de las víctimas publicación del informe como los escritos posteriores han dado lugar a polémicas sobre la responsabilidad de

Paris-Sud XI, Université de

189

LANDSAT-D assessment system library computer compatible tape (LASLIB-CCT/LAS-CCT)  

NASA Technical Reports Server (NTRS)

The format for computer compatible tapes containing thematic mapper archival data and product data generated by the LANDSAT-D Assessment System (LAS). These data tapes are engineering products developed primarily for LAS internal use to assist in the early evaluation of thematic mapper data quality and ground data processing algorithms during the limited period of one year following the launch of LANDSAT-D.

1982-01-01

190

GUA DE BIOQUMICA PARTE I. ESTRUCTURA BIOLGICA Y QUMICA DE LAS PROTENAS  

E-print Network

GUÍA DE BIOQUÍMICA PARTE I. ESTRUCTURA BIOL?GICA Y QUÍMICA DE LAS PROTEÍNAS 1. CARACTERÍSTICAS elementos Químicos, 2. Los enlaces no covalentes son importantes en la estructura biológica, 3. Los estructuras mayores, 6. Las proteínas desempeñan una función central en los sistemas vivos. 2. AMINOÁCIDOS 1

191

TEMARIO PARA EL EXAMEN DE BIOQUMICA PARTE I. ESTRUCTURA BIOLGICA Y QUMICA DE LAS PROTENAS  

E-print Network

TEMARIO PARA EL EXAMEN DE BIOQUÍMICA PARTE I. ESTRUCTURA BIOL?GICA Y QUÍMICA DE LAS PROTEÍNAS 1 dieciséis elementos Químicos 2. Los enlaces no covalentes son importantes en la estructura biológica 3. Los estructuras mayores 6. Las proteínas desempeñan una función central en los sistemas vivos. 2. AMINOÁCIDOS 1

192

Cincinnati levanta el teln para destacar a las mujeres en el teatro  

E-print Network

dramaturgas sirvieron este propsito esplndidamente. En las mismas, el encuentro entre escritoras del teatro de diferentes nacionalidadespor citar un ejemplo, la mesa redonda en la que participaron las espaolas Carmen Resino, Lidia Falcn y Julia Verdugo... por el Centro de Investigaciones Teatrales Rodolfo Usigli, Mxico). La primera noche (5 de octubre) se representaron textos de Diana Raznovich, de Lidia Falcn y de Nora Glickman (Argentina/ Nueva York). Se present la pieza Autumn Garden de...

Seda, Laurietz; Garcí a, William

1995-10-01

193

CONTRIBUCION AL CONOCIMIENTO DE LA FLORA DE LAS SIERRAS DE CAZORLA Y SEGURA  

E-print Network

CONTRIBUCION AL CONOCIMIENTO DE LA FLORA DE LAS SIERRAS DE CAZORLA Y SEGURA por 8. RIVAS numerosas ocasiones de estudiar la flora y la vegetación de las mon- tañas béticas. ]?r¡mto de aquellos- bario sobre la flora meridional ibérica (MAF). FlhcvwooD (1961!:) coííienzó a publicar un documentado

Herrera, Carlos M.

194

La competitividad internacional de las empresas espaolas y sus factores condicionantes. Algunas reflexiones desde la historia empresarial  

Microsoft Academic Search

El artculo analiza la competitividad internacional de las empresas espaolas en los siglos XIX y XX y sus factores condicionantes a partir de las investigaciones realizadas por la historia industrial y empresarial durante los ltimos veinte aos. En concreto, se examinan cuatro factores: la iniciativa empresarial, la tecnologa y el capital humano; el tamao relativo de las empresas y del

Jess Mara Valdaliso Gago

2004-01-01

195

EL DESARROLLO DE HABILIDADES EN LAS PERSO- NAS CON NECESIDADES EDUCATIVAS ESPECIALES A TRAVS DE LA EXPRESIN PLSTICA  

Microsoft Academic Search

SUMARIO: En todos los niveles de enseanza las asignaturas relacionadas con la Educacin Artstica estn perdiendo importancia frente a la relevancia de las materias instrumentales. Sin embargo resulta imprescindible la enseanza en la creatividad y el pensamiento divergente; aspectos que de inmediato nos hacen pensar en la Expresin Plstica. Ms all las enseanzas artsticas resultan una herramienta ideal para el

Jos Lobato Suero; Magdalena Martnez; Isabel Molinos Lara

196

Las IX Jornadas de Derecho penal, Derecho penitenciario y Criminologa en la UA reflexionan sobre el nuevo panorama del terrorismo  

E-print Network

Las IX Jornadas de Derecho penal, Derecho penitenciario y Criminología en la UA reflexionan sobre socio-criminológica" es el tema sobre el que se centran las IX Jornadas de Derecho penal, Derecho, Jesús Pradells, y a la decana de la Facultad de Derecho de la UA, Amparo Navarro. Las Jornadas, que se

Escolano, Francisco

197

Exposure of the marine deposit feeder Hydrobia ulvae to sediment spiked with LAS congeners.  

PubMed

The lethal and sub-lethal toxicity of LAS congeners to the mollusc gastropod Hydrobia ulvae were assessed in spiked sediment bioassays. This complements the little knowledge available to date on mixture effects in the sediment compartment. The LAS homologues joint effect was concentration additive ([summation operator]TU(i) = 0.8-1). As opposed to the 10-d LC10 based on the sediment associated LAS concentration (91-330 mg/kg) which was independent of the homologue chain length, the LC10 based on the dissolved LAS fraction (0.804-0.068 mg/L) decreased as the homologue chain length increased from 10 to 13 carbons. The quantitative structure-activity relationship (QSAR) derived from these data was log (1/LC10 (mol/L)) = 0.64 log K(ow) + 4.40 (n = 5; r(2) = 0.76; s = 0.24). It showed an apparent higher toxicity compared to the typical QSAR for polar narcosis in water-only systems probably due to the simultaneous exposure of the snail to LAS through the dissolved and the sediment associated fractions. The egestion rate of the surviving snails recovered after few days' exposure (1-d NOEC: 40-107 mg/kg, 9-d NOEC: 65-190 mg/kg) which suggests that the organisms were able to acclimate to LAS during the exposure. PMID:20236677

Mauffret, A; Temara, A; Blasco, J

2010-05-01

198

A New Transcriptional Repressor of the Pseudomonas aeruginosa Quorum Sensing Receptor Gene lasR  

PubMed Central

Pseudomonas aeruginosa pathogenic potential is controlled via multiple regulatory pathways, including three quorum sensing (QS) systems. LasR is a key QS signal receptor since it acts as a global transcriptional regulator required for optimal expression of main virulence factors. P. aeruginosa modulates the QS response by integrating this cell density-dependent circuit to environmental and metabolic cues. Hence, QS also controls the adaptation to challenging environmental niches, such as infection sites. However, little is known about the molecular mechanisms connecting QS and other signalling pathways. In this work, DNA-affinity chromatography was used to identify new lasR transcriptional regulators. This approach led to the identification and functional characterization of the TetR-like transcriptional repressor PA3699. This protein was purified and shown to directly bind to the lasR promoter region in vitro. The induction of PA3699 expression in P. aeruginosa PAO1 cultures repressed lasR promoter activity and the production of LasR-dependent virulence factors, such as elastase, pyocyanin, and proteases. These findings suggest a role for PA3699 in P. aeruginosa pathogenicity. P. aeruginosa genome encodes at least 38 TetR-family proteins, and PA3699 is the eighth member of this group functionally characterized so far and the first one shown to bind the lasR promoter in vitro. PMID:23861975

Longo, Francesca; Rampioni, Giordano; Bondi, Roslen; Imperi, Francesco; Fimia, Gian Maria; Visca, Paolo; Zennaro, Elisabetta; Leoni, Livia

2013-01-01

199

LAS0811: From Combinatorial Chemistry to Activation of Antioxidant Response Element  

PubMed Central

The antioxidant response element (ARE) and its transcription factor, nuclear factor-erythroid 2 p45-related factor 2 (Nrf2), are potential targets for cancer chemoprevention. We sought to screen small molecules synthesized with combinatorial chemistry for activation of ARE. By high-throughput screening of 9400 small molecules from 10 combinatorial chemical libraries using HepG2 cells with an ARE-driven reporter, we have identified a novel small molecule, 1,2-dimethoxy-4,5-dinitrobenzene (LAS0811), as an activator of the ARE. LAS0811 upregulated the activity of NAD(P)H:quinone oxidoreductase 1 (NQO1), a representative antioxidative enzyme regulated by ARE. It enhanced production of an endogenous reducing agent, glutathione (GSH). In addition, LAS0811 induced expression of heme oxygenase 1 (HO1), which is an ARE-regulated enzyme with anti-inflammatory activity. Furthermore, LAS0811 reduced cell death due to the cytotoxic stress of a strong oxidant, t-butyl hydroperoxide (t-BOOH). Mechanistically, LAS0811 upregulated the expression of Nrf2 and promoted its translocation into the nuclei leading to subsequent ARE activation. Taken together, LAS0811 is a novel activator of the ARE and its associated detoxifying genes and, thus, a potential agent for cancer chemoprevention. PMID:19794825

Zhu, Ming; Baek, Hyounggee; Liu, Ruiwu; Song, Aimin; Lam, Kit; Lau, Derick

2009-01-01

200

Monitoring Changes in Channel Morphology in Las Vegas Wash with Global Fiducials Program Imagery  

NASA Astrophysics Data System (ADS)

To borrow from a popular adage, "What happens in Las Vegas [Wash], stays in Las Vegas [Wash]"but only with a lot of help. This past decade has seen a concerted effort to curb erosion and sediment transport along the 12 mile long channel between East Las Vegas and Lake Mead. Las Vegas Wash is prototypical of an urban river in an arid environment that is being impacted by increasing urban development and impervious surface runoff within its drainage area. Rapid urbanization since the 1970s has increased the flow of water into Las Vegas Wash, causing severe channel destabilization. Within two decades millions of cubic yards of rocks and sediment were scoured out of the wash and transported downstream to Lake Mead. The wetlands that once covered over 2,000 acres within Las Vegas Wash dwindled to 200 acres in the 1990s as the channel became as much as 40 feet deeper and 300 feet wider at some points. In 1999 the Las Vegas Wash Coordination Committee (LVWCC) initiated a 20-year plan to construct erosion control structures (weirs) for channel stabilization and rock riprap for stream bank protection. The hope is to design structures that will slow down the water flow, trap sediments, and to eventually restore much of the wetland environment. Using high-resolution satellite imagery from the Global Fiducials Program Library housed at the U. S. Geological Survey, this transition is being tracked from 1999 to the present. From November 1999 to July 2008 new residential and commercial development has claimed an additional 12 square kilometers (3000 acres) of land in Henderson, NV, along the south side of Las Vegas Wash. Even with the increased volume of surface and groundwater runoff entering the wash, current sediment yields are much lower than the 1999 totals. The imagery documents the construction of 14 of the 22 LVWCC planned weirs by the year 2011. It also shows many miles of stream bank stabilization by riprap, planting of riparian vegetation and placing of obstructions in the channel. The replanting of native vegetation on storm debris flats is stabilizing some of the soil in the wash and also rejuvenating much of the wetland habitat. Las Vegas Wash is a test bed for the design and implementation of innovative methods for modifying stream morphology to achieve desirable results, as some of these methods are deemed successful and some are not as effective. The lessons learned about curbing erosion and sediment transport within Las Vegas Wash may be applied to other urban streams in arid environments.

Wheeler, D. J.

2012-12-01

201

Identification of LasR ligands through a virtual screening approach.  

PubMed

With the widespread occurrence of bacterial resistance to antibiotics, the development of new strategies beyond conventional treatments is a pursuit taken by public health institutions worldwide. LasR, a transcription factor that controls quorum sensing in Pseudomonas aeruginosa, has emerged as an attractive therapeutic target for the next generation of antimicrobial agents. In the present study, a virtual screening workflow combining pharmacophore- and structure-based approaches was used to identify new LasR ligands. Five novel inducers and three inhibitors of LasR activity were validated experimentally by use of a cell-based assay. Interestingly, these compounds are molecularly distinct from the native signal molecule, N-3-oxododecanoyl-L-homoserine lactone (OHN), and may serve as lead structures for the design of new drugs. The binding modes of these compounds to the OHN binding site in LasR were predicted and used to identify the key interactions that contribute to the induction and inhibition of LasR activity. PMID:23203920

Skovstrup, Sren; Le Quement, Sebastian Thordal; Hansen, Thomas; Jakobsen, Tim Holm; Harmsen, Morten; Tolker-Nielsen, Tim; Nielsen, Thomas E; Givskov, Michael; Taboureau, Olivier

2013-01-01

202

Identification of methyl triclosan and halogenated analogues in male common carp (Cyprinus carpio) from Las Vegas Bay and semipermeable membrane devices from Las Vegas Wash, Nevada  

USGS Publications Warehouse

Methyl triclosan and four halogenated analogues have been identified in extracts of individual whole-body male carp (Cyprinus carpio) tissue that were collected from Las Vegas Bay, Nevada, and Semipermeable Membrane Devices (SPMD) that were deployed in Las Vegas Wash, Nevada. Methyl triclosan is believed to be the microbially methylated product of the antibacterial agent triclosan (2, 4, 4'-trichloro-4-hydroxydiphenyl ether, Chemical Abstract Service Registry Number 3380-34-5, Irgasan DP300). The presence of methyl triclosan and four halogenated analogues was confirmed in SPMD extracts by comparing low- and high-resolution mass spectral data and Kovats retention indices of methyl triclosan with commercially obtained triclosan that was derivatized to the methyl ether with ethereal diazomethane. The four halogenated analogues of methyl triclosan detected in both whole-body tissue and SPMD extracts were tentatively identified by high resolution mass spectrometry. Methyl triclosan was detected in all 29 male common carp from Las Vegas Bay with a mean concentration of 596????g kg- 1 wet weight (ww) which is more than an order of magnitude higher than previously reported concentrations in the literature. The halogenated analogs were detected less frequently (21%-76%) and at much lower concentrations (< 51????g kg- 1 ww). None of these compounds were detected in common carp from a Lake Mead reference site in Overton Arm, Nevada.

Leiker, T. J.; Abney, S. R.; Goodbred, S. L.; Rosen, M. R.

2009-01-01

203

Estructura espacial de las rbitas caticas en un modelo autoconsistente de galaxia elptica  

NASA Astrophysics Data System (ADS)

Hemos logrado construir modelos autoconsistentes de sistemas estelares utilizando una aproximacin cuadrupolar para el potencial. Esto nos permite determinar rbitas y exponentes de Lyapunov de objetos que tienen posiciones y velocidades equivalentes a las que se obtienen de la funcn de distribucin del sistema. La distribucin espacial de las rbitas caticas exhibe considerable estructura y, lo que es ms importante an, los valores de los exponentes de Lyapunov calculados sobre intervalos finitos de tiempo, muestran una fuerte correlacin con el comportamiento de la rbita en esos mismos intervalos, por lo que permiten reconocer distintos subsistemas con diferentes distribuciones espaciales.

Muzzio, J. C.

204

Metforas del artista adolescente: El juego alucinante en Sobre las mismas rocas  

E-print Network

ditirambo: "Ya entra Willy Price en la arena, con sus piernas robustas y su cuerpo gil. Tenerlo a su lado es la seguridad del triunfo. Es el gran Larry de las piernas que corren! Es el gran Johnny de las piernas que ruedan! Es el gran Price que... siempre triunfar!" (31). El coro de espectadores responde fuera de escena: "Que juegue Willy Price! Que corra Larry Price! Que gane Johnny Price! Que juegue, que corra, que gane, Willy Price-Larry Price-Johnny Price!" (32). La anormalidad del habla...

Febles, Jorge

1994-04-01

205

After 58 years, an icon on the Las Vegas Strip closes  

NSDL National Science Digital Library

Las Vegas' Sahara Hotel and Casino closing after more than 58 yearshttp://news.blogs.cnn.com/2011/05/16/las-vegas-sahara-hotel-and-casino-closing-after-more-than-58-years/?hpt=C2Las Vegas Historyhttp://www.lasvegassun.com/history/Southern Nevada: The Boomtown Yearshttp://digital.library.unlv.edu/boomtown/Vegas Tripping: Implosionshttp://www.vegastripping.com/implosions/The Neon Museumhttp://neonmuseum.org/All that glitters is not gold, and when it comes to the glittering lights of the Vegas Strip, nothing is permanent. This weekend, the Sahara hotel saw its last guests leave as it ended its 58-year run on the Strip. The hotel was the brainchild of one Milton Prell, a former jewelry salesman who ran a bingo parlor in Montana. In 1952, he opened the Sahara, which he envisioned as a "jewel of the desert". The Sahara was the sixth hotel on the Strip, and with its fantastical Congo Room supper club and Casbar Lounge, it was a flourishing part of the "ring-a-ding-ding" 1950s and 1960s scene in Las Vegas. Characters who were part of the Strip's history included legendary entertainers Ray Bolger, Donald O'Connor, and Louis Prime, who performed there for years with his wife, Keely Smith. While plans for the site are in flux, it is hoped that some of the Sahara's iconic neon signs will end up in the nearby Neon Museum.The first link will take visitors to a nice article from this Saturday's Las Vegas Sun about the closing of the Sahara. The second link leads to piece from CNN's blog which also talks about the recent closing of this famed Strip stalwart. The third link will whisk users away to a terrific site from the Las Vegas Sun which chronicles the highs and lows of the Strip's history. Moving on, the fourth link leads to a nice digital collection from the University of Nevada, Las Vegas which documents the boom years of Southern Nevada through images, documents, and other archival items. The fifth link leads to a rather raucous and fun archive of Strip hotel implosions captured for posterity. Finally, the last link leads to the homepage of The Neon Museum in Las Vegas, which celebrates neon culture in all of its glory.

Grinnell, Max

2011-05-20

206

Bioconcentration of the anionic surfactant linear alkylbenzene sulfonate (LAS) in the marine shrimp Palaemonetes varians: a radiotracer study.  

PubMed

Uptake and depuration kinetics of dissolved [(14)C]C??-6-linear alkylbenzene sulfonate (LAS) were determined in the shrimp Palaemonetes varians using environmentally relevant exposure concentration. The shrimp concentrated LAS from seawater with a mean BCF value of 120 L kg(-1) after a 7-day exposure. Uptake biokinetics were best described by a saturation model, with an estimated BCFss, of 159 34 L kg(-1), reached after 11.5 days. Shrimp weight influenced significantly BCF value with smaller individuals presenting higher affinity to LAS. To the light of a whole body autoradiography, major accumulation of LAS occurred in the cephalothorax circulatory system (gills, heart, hepatopancreas) and ocular peduncle, but not in the flesh, limiting potential transfer to human consumers. LAS depuration rate constant value of the shrimp was 1.18 0.08 d(-1) leading to less than 1% of remaining LAS in its tissues after 8 days of depuration. PMID:25016418

Renaud, Florent; Warnau, Michel; Oberhnsli, Franois; Teyssi, Jean-Louis; Temara, Ali; Rouleau, Claude; Metian, Marc

2014-08-15

207

Estudio sobre las dosis de radiacin y los riesgos de cncer causados por la prueba atmica Trinity realizada en 1945  

Cancer.gov

El NCI tiene planeado realizar entrevistas en profundidad para determinar cul era la alimentacin caracterstica de las poblaciones indgenas americanas, hispanas (latinas) y chicanas que vivan en New Mexico a mediados de 1940 y utilizar informacin fcilmente disponible sobre la alimentacin y el estilo de vida de las poblaciones blancas. Estas entrevistas representan un paso importante para hacer estimaciones de las dosis de radiacin generadas por la prueba Trinity.

208

The Development of Child Subjectivity in "La lengua de las mariposas"  

ERIC Educational Resources Information Center

Jose Luis Cuerda's film "La lengua de las mariposas" is set in rural Galicia in the immediate lead-up to the outbreak of the Spanish Civil War. It portrays the tender relationship between a Republican schoolteacher, Don Gregorio, and a boy named Moncho. Upon the Nationalist capture of the town, the young Moncho hurls stones at his friend, but

Ryan, Lorraine

2012-01-01

209

Robots in Las Vegas: Demos and International Agency Panel Highlight NSF Robotics Workshop  

NSF Publications Database

... at Bally's Hotel in Las Vegas October 26 to see demonstrations of robotics, computer vision and ... demonstrations: Oct. 26, 12:00 p.m. - 1:30 p.m. International panel: Oct. 26, 1:30 p.m. - 3:00 p.m ...

210

A Brief Account of the Destruction of the by Bartolome de las Casas  

E-print Network

or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www by them. Author: Bartolome de las Casas Release Date: January 9, 2007 [EBook #20321] Language: English then about 50 years of age (as he himself declares) to run the Hazards and Dangers by Sea, and the Risque

O'Donnell, Tom

211

Signal and Image Processing, SIP-2000, Las Vegas, USA, (c) IASTED SEARCHING FOR AURORA  

E-print Network

Signal and Image Processing, SIP-2000, Las Vegas, USA, (c) IASTED SEARCHING FOR AURORA MIKKO T. We demonstrate an automatical algorithm for searching aurora in auroral all-sky images. The algorithm that contain aurora and require further examination in the detection phase. The detection is based on shape

Syrjäsuo, Mikko

212

2011 Center for Gaming Research University Libraries University of Nevada, Las Vegas Number 11 October 2011  

E-print Network

, panguingui, slot machine, any banking or percentage game or any other game or device approved©2011 Center for Gaming Research · University Libraries · University of Nevada, Las Vegas Number 11 October 2011 Center for Gaming Research Occasional Paper Series University Libraries University of Nevada

Cho, Hokwon

213

NOTIFICACIN CONJUNTA SOBRE PRACTICAS DE PRIVACIDAD Y SOBRE LAS DISPOSICIONES DE ASISTENCIA  

E-print Network

Facultades de Medicina, Enfermería, Profesiones de la Salud, Dentistería y Farmacia y otros proveedores de salud afiliados, incluyendo todos los empleados, voluntarios, y el personal de servicios de salud de la relativa a su salud entre ellos para fines de tratamiento, pagos o el buen funcionamiento de las

Príncipe, José Carlos

214

EFICACIA DE LAS INTERVENCIONES FARMACOLGICAS EN EL TRATAMIENTO DE LA HIPERACTIVIDAD  

Microsoft Academic Search

El presente estudio trata de sintetizar, integrar y discutir los principales re- sultados constatados en la investigacin con respecto a la eficacia de las interven- ciones farmacolgicas ms frecuentemente utilizadas en el tratamiento de la hipe- ractividad. Este trabajo constituye la primera parte de un estudio ms amplio basa- do en una selectiva revisin y anlisis cualitativo de la literatura

Ana Miranda Casas; Juan Carlos Pastor Soriano

215

Vegetation of Grassy Remnants in the Las Vegas Valley, Southern Nevada  

Microsoft Academic Search

The approximately 1000-km2 Las Vegas Valley contains a rich assemblage of unique plant communities in the eastern Mojave Desert. Yet, there is little published documentation of this vegetation as its destruction continues with proceeding urban development. Development has intensified after the 1998 Southern Nevada Public Land Management Act mandated the disposal of federal lands. We document plant communities at four

Jill E. Craig; Scott R. Abella

216

Simulation Modeling of the Shallow Ground-Water System in Las Vegas Valley, Nevada.  

National Technical Information Service (NTIS)

The vast influx of population began pouring into the Las Vegas Valley in the 1940's the hydrologic regime of the Valley has undergone significant change. This domestic irrigation of vegetation together with wastewater return flows has caused a perennial s...

J. A. Westphal

1978-01-01

217

Nutrient Contribution of Nonpoint Source Runoff in the Las Vegas Valley  

Microsoft Academic Search

A Geographic Information System (GIS) based nonpoint source runoff model is developed for the Las Vegas Valley, Nevada, to estimate the nutrient loads during the years 2000 and 2001. The estimated nonpoint source loads are compared with current wastewater treatment facilities loads to determine the nonpoint source contribution of total phosphorus (TP), total nitrogen (TN), and total suspended solids (TSS)

Marcelo Reginato; Thomas C. Piechota

2004-01-01

218

SIMULATION MODELING OF THE SHALLOW GROUND-WATER SYSTEM IN LAS VEGAS VALLEY, NEVADA  

EPA Science Inventory

The vast influx of population began pouring into the Las Vegas Valley in the 1940's the hydrologic regime of the Valley has undergone significant change. This domestic irrigation of vegetation together with wastewater return flows has caused a perennial stream leaving the Valley ...

219

Deteccin de Anormalidades en las Redes LAN Mediante la Implementacin de un PCA  

Microsoft Academic Search

El presente trabajo propone una forma de obtener una mejor representacin del comportamiento del trfico de las redes LAN, mediante el con el fin de proporcionar una herramienta visual ms efectiva que aquellas que emplean una mtrica sencilla para realizar dicha tarea. La idea inicial para el desarrollo de este trabajo se toma del proyecto S NET de los Laboratorios

Ricardo Armando; Barrera Cmara; Jess Alejandro; Flores Hernndez

220

Fluid chemistry and temperatures prior to exploitation at the Las Tres Vrgenes geothermal field, Mexico  

Microsoft Academic Search

Generation of electricity at the Las Tres Vrgenes (LTV) geothermal field, Mexico, began in 2001. There are currently nine geothermal wells in the field, which has an installed electricity generating capacity of 10MWe. The chemical and temperature conditions prevailing in the field prior to its exploitation have been estimated, including their central tendency and dispersion parameters. These conditions were computed

Surendra P. Verma; Kailasa Pandarinath; Edgar Santoyo; Eduardo Gonzlez-Partida; Ignacio S. Torres-Alvarado; Enrique Tello-Hinojosa

2006-01-01

221

Helmintos parsitos presentes en las explotaciones de ganado caprino de la Comunidad Valenciana  

Microsoft Academic Search

Con el objetivo de conocer la frecuencia y distribucin de los helmintos parsitos del ganado caprino en las tres provincias biogeogrficas que incluye la Comunidad Valenciana, se ha realizado un estudio cuantitativo mediante anlisis coprolgicos. Para ello, se tomaron muestras en 89 explotaciones de cabras elegidas al azar (er ror mximo aceptado = 10%, nivel de confianza = 95%). Se

S. Hernndez-de-Lujn

222

Constructing The Pomerium in Las Vegas: A Case Study of Emerging Trends in American Gated Communities  

Microsoft Academic Search

Private communities, many of them gated, are the predominant form of new housing construction across much of the United States. The rapid spread of this institution is driven by structural forces such as rising land costs, local government fiscal constraints, and consumer preferences for security and control over space. Some municipalities, such as Las Vegas, are actively promoting this transformation

Evan McKenzie

2005-01-01

223

Structural controls on diffuse degassing in the Las Caadas caldera, Tenerife, Canary Islands  

Microsoft Academic Search

The Las Caadas caldera is an elliptical depression located in the central part of the Tenerife Island. The active Teide stratovolcano stands in the centre of the depression, which is limited to the south by the caldera wall, up to 500 m high above the caldera floor. Mapping most of the caldera wall at 1:5000 has provided new insights on

I. Galindo; C. Soriano; J. Mart; N. Prez

2003-01-01

224

PROCEEDINGS: SYMPOSIUM ON FLUE GAS DESULFURIZATION HELD AT LAS VEGAS, NEVADA, MARCH 1979; VOLUME I  

EPA Science Inventory

The publication, in two volumes, contains the text of all papers presented at EPA's fifth flue gas desulfurization (FGD) symposium, March 5-8, 1979, at Las Vegas, Nevada. A partial listing of titles includes the following: Overview of control technology--the bridge between energy...

225

2011 Center for Gaming Research University Libraries University of Nevada, Las Vegas Number 12 November 2011  

E-print Network

, Las Vegas Betting on the U.S. Market A Discussion of the Legality of Sports Gaming Businesses1 Glenn Light, Karl Rutledge, and Quinton Singleton ABSTRACT: Over time, the US sports gaming industry has of the preeminent US laws that regulate the sports gaming industry and a brief review of various sports gaming

Cho, Hokwon

226

La evaluacin del desempeo de las empresas privatizadas en Colombia: Coincide con la experiencia internacional?  

Microsoft Academic Search

Este estudio pretende evaluar si las empresas que fueron privatizadas en Colombia durante los aos 1990 mejoraron sustancialmente su productividad y rentabilidad, como consecuencia de los cambios gerenciales que se debieron dar, o si por el contrario, continuaron en niveles similares, contrariando la hiptesis de que los nuevos dueos propiciaran cambios sustanciales en su estrategia, como lo demuestra la experiencia

Hctor Ochoa Daz; Jaime Andrs Collazos Rodrguez

2004-01-01

227

FACTORES DE DESAPARICIN DE LAS MICROS Y PEQUEAS EMPRESAS TEXTILES DE MOROLEN Y URIANGATO  

Microsoft Academic Search

El presente estudio aborda la problemtica a las que se enfrentan los micros y pequeos empresarios del ramo textil en la zona comercial e industrial de Morolen y Uriangato, que tan competitivos son con otros fabricantes nacionales, as como la afectacin que tienen con la competencia de productos importados, as como de productos de dudosa procedencia (importacin ilegal o robados)

Crescenciano Tinoco Tinoco; Eugenio Guzman Soria

2009-01-01

228

PROCEEDINGS: SYMPOSIUM ON FLUE GAS DESULFURIZATION HELD AT LAS VEGAS, NEVADA, MARCH 1979; VOLUME II  

EPA Science Inventory

The publication, in two volumes, contains the text of all papers presented at EPA's fifth flue gas desulfurization (FGD) symposium, March 5-8, 1979, at Las Vegas, Nevada. A partial listing of papers in Volume 2 includes the following: Basin Electric's involvement with dry flue ga...

229

Las Meninas in VR: Storytelling and the Illusion in Art Hisham Bizri, Andrew Johnson, Christina Vasilakis  

E-print Network

Las Meninas in VR: Storytelling and the Illusion in Art Hisham Bizri, Andrew Johnson, Christina in virtual reality by placing VR in the realm of storytelling storytelling that is not simply formalistic in the realm of storytelling that is not simply formalistic and decorative, but also psychological

Johnson, Andrew

230

CAPABILITIES OF THE ENVIRONMENTAL MONITORING AND SUPPORT LABORATORY-LAS VEGAS  

EPA Science Inventory

This report describes the present and developing capabilities of the U.S. Environmental Protection Agency's Environmental Monitoring and Support Laboratory in Las Vegas, Nevada. Its purpose is to present comprehensive information in concise form to enable users of the Laboratory'...

231

University of Nevada Las Vegas Arduino Project Report: Fan Speed Control as a Function of Thermistor  

E-print Network

University of Nevada Las Vegas Arduino Project Report: Fan Speed Control as a Function, and an arduino board. The arduino board is programmed to read the analog input, the thermistor, and respond by the arduino that will decrease the speed of the fan. Furthermore, if the temperature goes up, the resistance

Kachroo, Pushkin

232

University of Nevada, Las Vegas Policy on Laboratory Animal Care and Use  

E-print Network

, sensitive and respectful environment during all animal experimentation, studies and use. 6. ParticipateUniversity of Nevada, Las Vegas Policy on Laboratory Animal Care and Use This policy provides guidance for the humane use and treatment of animals used in research, teaching and testing

Hemmers, Oliver

233

Perchlorate uptake by salt cedar ( Tamarix ramosissima) in the Las Vegas Wash riparian ecosystem  

Microsoft Academic Search

Perchlorate ion (ClO4?) has been identified in samples of dormant salt cedar (Tamarix ramosissima) growing in the Las Vegas Wash. Perchlorate is an oxidant, but its reduction is kinetically hindered. Concern over thyroid effects caused the Environmental Protection Agency (EPA) to add perchlorate to the drinking water Contaminant Candidate List (CCL). Beginning in 2001, utilities will look for perchlorate under

Edward T. Urbansky; Matthew L. Magnuson; Catherine A. Kelty; Stephanie K. Brown

2000-01-01

234

Changes in the morphometry of Las Vegas Wash and the impact on water quality  

USGS Publications Warehouse

Las Vegas Wash, a natural wash east of Las Vegas, Nevada, carries stormwater, groundwater drainage, and sewage effluent from two sewage treatment plants to Lake Mean. Over 80 percent of the normal discharge of approximately 3.4 m3/s (120 ft3/s) consists of effluent from the City of Las Vegas and Clark County sewage treatment plants. Beginning in the 1950s, a large wetland area developed along the wash that supported waterfowl populations and contributed to some water quality transformations. Heavy rains and subsequent flooding in the area in 1983 and 1984 resulted in erosion and channelization that greatly reduced the wetland area within Las Vegas Wash. The reduction in wetland area shortened water travel time in the wash and affected water quality. The primary impacts on the water entering Lake Mead have been an increase in temperature, a decrease in dissolved oxygen concentration, and an increase in ammonia levels. Other physical-chemical parameters and changes in nutrient transformations are also discussed.

Roline, Richard A.; Sartoris, James J.

1988-01-01

235

Twelve Years of Sociocultural Action in the Las Villas Area. Chapter 2.  

ERIC Educational Resources Information Center

This chapter reports on the activities of the Rural Continuing Education Centre (CREPA), a nongovernmental organization run by volunteers from small agricultural villages in the Las Villas area of Salamanca, Spain. The organization was founded in 1983 with the goal of improving living conditions and community life for villagers through social

Gonzalez, Quintin Garcia

236

Las polticas pblicas: alternativa para combatir la pobreza en Mxico, con enfoque local  

Microsoft Academic Search

El Estado Mexicano tiene la obligacin de que las polticas pblicas enfocadas al desarrollo regional, sean un instrumento real de poltica econmica a nivel regional, para el combate de la pobreza, desigualdad y la marginacin social. Para ello, el reto es crecer en trminos econmicos, en el mbito nacional y estatal, para generar esa riqueza y poder pagar impuestos a

Lorenzo Salgado Garca; Mercedes Prez Rangel

2010-01-01

237

Ao acadmico 2010-2011 ESTRUCTURA, EXPLICACION Y FACTORES DE LAS UNIVERSIDADES  

E-print Network

Año académico 2010-2011 1 ESTRUCTURA, EXPLICACION Y FACTORES DE LAS UNIVERSIDADES INDICE: I la estructura de la representación estudiantil a los estudiantes de la Facultad de Ciencias colectivos y su progresión a veces limita o restringe los derechos de otro colectivo y por ello se estructura

Escolano, Francisco

238

Factores que afectan la estructura y el funcionamiento de las lagunas pampeanas  

Microsoft Academic Search

de planctvoros. La compleja interaccin de factores climticos y de uso de la tierra explicara la ocurrencia de cambios no peridicos en la tipologa de una determinada laguna, fenmeno que se intensifica a medida que las lagunas disminuyen de tamao. (Palabras clave: lagos someros, regin pampeana, ecosistemas acuticos, estructura y funcionamiento.) ABSTRACT. Factors affecting the structure and functioning of shallow

ROLANDO QUIRS; ARMANDO M RENNELLA; MARA B BOVERI; JUAN J ROSSO; ALEJANDRO SOSNOVSKY

239

Evolucin de la Estructura de Mercado de las Telecomunicaciones en Espaa  

Microsoft Academic Search

El sector de las telecomunicaciones ha experimentado un importante cambio estructural durante los ltimos cuatro aos, tanto en los aspectos regulatorios como de mercado. La razn, sin duda, est en el cambio tecnolgico y de mentalidad que ha permitido la liberalizacin y globalizacin de los mercados. En este artculo se da una visin panormica de los aspectos regulatorios a lo

lvaro Escribano; Antonio G. Zaballos

2002-01-01

240

Los conceptos de "estructura" y "modelo" como ejemplo paradigmtico transdiciplinar en las Ciencias Humanas y Sociales  

E-print Network

1 Los conceptos de "estructura" y "modelo" como ejemplo paradigmático transdiciplinar en las Ciencias Humanas y Sociales Mgster. Ferro, María Virginia. Introducción: Los conceptos de "estructura" y a los diferentes sentidos de "estructura" y "modelo". Luego se presenta bajo la mirada de la Concepción

Paris-Sud XI, Université de

241

AMLIORATION DES PLANTES Nouveau regard sur le comportement de l'as-  

E-print Network

AM?LIORATION DES PLANTES Nouveau regard sur le comportement de l'as- perge (Asparagus officinalis L'asperge (Asparagus officinalis L.), de la famille des Liliacées, est une espèce dioïque et pérenne dont la in vitro, griffe, arbre, marqueurs biochimiques, rujeunissement, pérennité. SUMMARY Asparagus cloning

Paris-Sud XI, Université de

242

Seismic Wave Amplification in Las Vegas: Site Response and Empirical Estimates of Ground Motion  

Microsoft Academic Search

This presentation will summarize a multidisciplinary effort to understand seismic wave amplification in Las Vegas Valley. The project involves weak motion recording and analysis, geotechnical and seismic refraction field studies, geologic and lithologic interpretation and model building. We will provide a brief overview of the project, then focus on specifics of seismic wave amplification including observations and interpretations. We analyzed

A. Rodgers; D. McCallen; H. Tkalcic; J. Wagoner; J. Louie; J. Anderson; B. Luke; C. Snelson; W. Taylor

2004-01-01

243

LA TRAMPA DEL MAL Domingo 1 de enero a las 22:00 h  

E-print Network

... "La trampa del mal" es la primera entrega de "The night chronicles", una serie de historias de terror impotentes y sufrir el terror más profundo. A cada uno de ellos le empiezan a ocurrir cosas terribles y la concebidas por M. Night Shyamalan. ALMAS CONDENADAS Lunes 2 de enero a las 22:00 h "Almas condenadas" nos

Escolano, Francisco

244

SIGGRAPH '91, Las Vegas Computer Graphics, Volume 25, Number 4, July 1991 Coping with Friction for  

E-print Network

SIGGRAPH '91, Las Vegas Computer Graphics, Volume 25, Number 4, July 1991 Coping with Friction of contacting bodies with friction are presented. The bodies are restricted to be perfectly rigid bodies that contact at finitely many points. Contact forces between bodies must satisfy the Coulomb model of friction

Baraff, David

245

DISYUNTIVAS EN LAS CONCEPCIONES SOBRE AUTONOMA Y BENEFICENCIA QUE AFECTAN LA TERAPUTICA DEL INTENTO SUICIDA.  

PubMed

El objetivo del trabajo es conocer las disyuntivas entre los principios de beneficencia y autonoma, que se presentan en la relacin mdico-paciente, durante la teraputica del intento de suicidio.La investigacin se realiz en dos hospitales psiquitricos de la Ciudad de Mxico. La muestra incluy a tres sujetos con intento de suicidio, mayores de 18 aos, que eran atendidos en consulta externa a causa de una lesin autoinfligida en el ltimo ao, y a tres psiquiatras que trataban a estos pacientes. La informacin se obtuvo previo consentimiento informado en entrevistas individuales. Se llev a cabo un anlisis de discurso argumentado para encontrar los significados que los participantes otorgaron a los principios bioticos y las posibles disyuntivas entre stos.Las discordancias entre la beneficencia y la autonoma estuvieron relacionadas con el beneficio del tratamiento, el respeto por los valores y las creencias de los pacientes, entre otros. Este trabajo presenta consideraciones ticas relevantes en el escenario clnico, al ofrecer al psiquiatra un anlisis biotico que le permita actuar de acuerdo con la beneficencia y respetando la autonoma del paciente frente a casos de intento de suicidio y, de esta forma procurar una mejor atencin para ellos. PMID:20830214

Mondragn, Liliana; Monroy, Zuraya; Ito, Ma Emily; Medina-Mora, Dra Ma Elena

2010-06-01

246

Proton monitor Las Dos Torres: First intercomparison of in-orbit results  

Microsoft Academic Search

The proton monitor on board NANOSAT 1B - Las Dos Torres (translated, The Two Towers) - and its preliminary results after two years in orbit are presented. This satellite was fully developed by INTA (National Institute of Aerospace Technique, Spain) and was launched on the 29th of July, 2009. The instrument includes two stacks of radiation sensing elements: the dark

J. J. Jimenez; J. M. Oter; V. Apestigue; C. Hernando; S. Ibarmia; W. Hajdas; J. Sanchez-Paramo; M. T. Alvarez; I. Arruego; H. Guerrero

2011-01-01

247

Temperature trends and Urban Heat Island intensity mapping of the Las Vegas valley area  

NASA Astrophysics Data System (ADS)

Modified urban climate regions that are warmer than rural areas at night are referred to as Urban Heat Islands or UHI. Islands of warmer air over a city can be 12 degrees Celsius greater than the surrounding cooler air. The exponential growth in Las Vegas for the last two decades provides an opportunity to detect gradual temperature changes influenced by an increasing presence of urban materials. This thesis compares ground based thermometric observations and satellite based remote sensing temperature observations to identify temperature trends and UHI areas caused by urban development. Analysis of temperature trends between 2000 and 2010 at ground weather stations has revealed a general cooling trend in the Las Vegas region. Results show that urban development accompanied by increased vegetation has a cooling effect in arid climates. Analysis of long term temperature trends at McCarran and Nellis weather stations show 2.4 K and 1.2 K rise in temperature over the last 60 years. The ground weather station temperature data is related to the land surface temperature images from the Landsat Thematic Mapper to estimate and evaluate urban heat island intensity for Las Vegas. Results show that spatial and temporal trends of temperature are related to the gradual change in urban landcover. UHI are mainly observed at the airport and in the industrial areas. This research provides useful insight into the temporal behavior of the Las Vegas area.

Black, Adam Leland

248

V Festival Nacional del Nuevo Teatro: Las fuentes inagotables del arte  

E-print Network

intento por recrear teatralmente las peripecias del narco-trfico en Colombia con Golpe de suerte, es indudable que el conjunto dramtico La Candelaria ha aprendido de sus fracasos para sorprendernos con el montaje de una obra que, en consenso de los...

Má rceles Daconte, Eduardo

1982-10-01

249

Liderazgo y autonoma. Colombia en el Consejo de Seguridad de las Naciones Unidas 1989-1990  

Microsoft Academic Search

El autor da a conocer y analiza un episodio casi desconocido de cmo fue la participacin de Colombia en el Consejo de Seguridad de las Naciones Unidas durante 1989 y 1990. Estos dos aos fueron enriquecedores para el pas y rescataron parte importante de su perfil internacional, ya que tuvo que ver con decisiones trascendentales sobre asuntos tales como la

Juan Camilo Rodrguez Gmez

250

2.11. LA VIOLENCIA Y EL NARCOTRFICO EN LAS PROVINCIAS DE PADRE  

Microsoft Academic Search

El presente informe tiene como finalidad analizar el impacto y reconstruir la historia del conflicto armado interno y el narcotrfico entre la poblacin urbana, rural campesina e indgena (Cashibo y Shipibo Conibo) de las provincias de Padre Abad y Coronel Portillo en el departamento de Ucayali entre fines de los aos 80 y mediados de los aos 90. Ambas provincias

ABAD Y CORONEL PORTILLO

251

UNIVERSITY OF NEVADA, LAS VEGAS DIFFERENTIAL FEE PROPOSAL FOR UNLV PHYSICAL THERAPY  

E-print Network

UNIVERSITY OF NEVADA, LAS VEGAS DIFFERENTIAL FEE PROPOSAL FOR UNLV PHYSICAL THERAPY Response of the semester by students. PHYSICAL THERAPY Board Campus Non-"Consumables" New/Final Approved Approved Portion Programs. Physical Therapy Program Enrollments Annual FTE Standing FY 2006 FY 2007 FY 2008 FY 2009 FY

Hemmers, Oliver

252

Between Poverty and a Lifestyle: The Leisure Activities of Homeless People in Las Vegas  

Microsoft Academic Search

Housed people judge homeless people, and in particular their leisure activities, as indicators of whether that person has chosen a homeless lifestyle and therefore deserves homelessness. To achieve a more complex understanding of contemporary homelessness, the author conducted ethnographic fieldwork over ten months in Las Vegas, Nevada, interviewing and participant observing dozens of homeless men and women, including observations of

Kurt Borchard

2010-01-01

253

In IC-AI-2002 Las Vegas Obligations in a BDI Agent Architecture  

E-print Network

would want to change the current situation (the agent's set of desires), and (iii) what the agentIn IC-AI-2002 Las Vegas Obligations in a BDI Agent Architecture Gordon Beavers and Henry Hexmoor architectures. It has long been recognized that social elements enhance multi-agent performance. Ideas

Hexmoor, Henry

254

Crustal structure in the vicinity of Las Vegas, Nevada, from seismic and gravity observations  

USGS Publications Warehouse

A seismic-refraction profile indicates that the crust of the Earth increases in thickness by as much as 5 km over a horizontal distance of less than 25 km northeast of Las Vegas, Nevada. This feature correlates with a decrease in the Bouguer anomaly and an increase in the average surface altitude.

Roller, John C.

1963-01-01

255

Revista Iberoamericana de Educacin (ISSN: 1681-5653) MULTILIBROS O "LIBROS A LA CARTA": LAS VENTAJAS  

E-print Network

Revista Iberoamericana de Educación (ISSN: 1681-5653) MULTILIBROS O "LIBROS A LA CARTA": LAS MANUALES ESCOLARES ACTUALES Cuando se habla de libros de texto es común encontrar opiniones contrapuestas importante negocio económico que se traduce en beneficios millonarios. Ciertamente, el gasto en libros de

Campanario, Juan Miguel

256

UNIVERSITY OF NEVADA, LAS VEGAS DIFFERENTIAL FEE PROPOSAL FOR UNLV MASTERS OF SOCIAL WORK PROGRAM  

E-print Network

UNIVERSITY OF NEVADA, LAS VEGAS DIFFERENTIAL FEE PROPOSAL FOR UNLV MASTERS OF SOCIAL WORK PROGRAM the School of Social Work sought input from students concerning the differential fee proposal for the Masters of Social Work program in light of a new fee structure proposal. On September 21, 2011

Hemmers, Oliver

257

SLAC, a complex between Sla1 and Las17, regulates actin polymerization during clathrin-mediated endocytosis  

PubMed Central

During clathrin-mediated endocytosis, branched actin polymerization nucleated by the Arp2/3 complex provides force needed to drive vesicle internalization. Las17 (yeast WASp) is the strongest activator of the Arp2/3 complex in yeast cells; it is not autoinhibited and arrives to endocytic sites 20 s before actin polymerization begins. It is unclear how Las17 is kept inactive for 20 s at endocytic sites, thus restricting actin polymerization to late stages of endocytosis. In this paper, we demonstrate that Las17 is part of a large and biochemically stable complex with Sla1, a clathrin adaptor that inhibits Las17 activity. The interaction is direct, multivalent, and strong, and was mapped to novel Las17 polyproline motifs that are simultaneously class I and class II. In vitro pyrene-actin polymerization assays established that Sla1 inhibition of Las17 activity depends on the class I/II Las17 polyproline motifs and is based on competition between Sla1 and monomeric actin for binding to Las17. Furthermore, live-cell imaging showed the interaction with Sla1 is important for normal Las17 recruitment to endocytic sites, inhibition during the initial 20 s, and efficient endocytosis. These results advance our understanding of the regulation of actin polymerization in endocytosis. PMID:22973053

Feliciano, Daniel; Di Pietro, Santiago M.

2012-01-01

258

PRCTICAS AMBIENTALES EN EL SECTOR DE LA CONSTRUCCIN. EL CASO DE LAS EMPRESAS CONSTRUCTORAS ESPAOLAS \\/ ENVIRONMENTAL PRACTICES IN THE CONSTRUCTION SECTOR. THE CASE OF THE SPANISH CONSTRUCTION FIRMS  

Microsoft Academic Search

Existe una abundante literatura que analiza las prcticas de gestin medioambiental de las empresas, tanto desde una perspectiva multisectorial como unisectorial. Sin embargo, el nmero de estudios centrados en el sector de la construccin es muy reducido debido, quiz, a las peculiaridades de funcionamiento que ste presenta y que se trasladan a la gestin medioambiental de las empresas constructoras. En

P. Pieiro Garca; A. Garca-Pintos Escuder

2009-01-01

259

Factores determinantes del tamao del Sector no Lucrativo en las Comunidades Autnomas espaolas\\/Determinant factors for the Size of the Nonprofit Sector in the Spanish regions  

Microsoft Academic Search

En este trabajo se analizan los factores determinantes del tamao del Sector No Lucrativo en las Comunidades Autnomas espaolas, a partir de las hiptesis que se derivan de las aportaciones tericas ms relevantes de la literatura econmica en este mbito. Para ello se realiza un anlisis economtrico multivariante que somete a contraste las hiptesis propuestas por la teora econmica para

BEATRIZ CALDERON MILLN

2008-01-01

260

Isolation of the autoinducer-quenching strain that inhibits LasR in Pseudomonas aeruginosa.  

PubMed

Quorum sensing (QS) has been recognized as a general phenomenon in microorganisms and plays an important role in many pathogenic bacteria. In this report, we used the Agrobacterium tumefaciens biosensor strain NT1 to rapidly screen for autoinducer-quenching inhibitors from bacteria. After initial screening 5389 isolates obtained from land and beach soil, 53 putative positive strains were identified. A confirmatory bioassay was carried out after concentrating the putative positive culture supernatant, and 22 strains were confirmed to have anti-LasR activity. Finally, we determined the strain JM2, which could completely inhibit biofilm formation of Pseudomonas aeruginosa PAO1, belonged to the genus Pseudomonas by analysis of 16S rDNA. Partially purified inhibitor factor(s) F5 derived from culture supernatants specifically inhibited LasR-controlled elastase and protease in wild type P. aeruginosa PAO1 by 68% and 73%, respectively, without significantly affecting growth; the rhl-controlled pyocyanin and rhamnolipids were inhibited by 54% and 52% in the presence of 100 g/mL of F5. The swarming motility and biofilm of PAO1 were also inhibited by F5. Real time RT-PCR on samples from 100 g/mL F5-treated P. aeruginosa showed downregulation of autoinducer synthase (LasRI and rhlI) and cognate receptor (lasR and rhlR) genes by 50%, 28%, 48%, and 29%, respectively. These results provide compelling evidence that the F5 inhibitor(s) interferes with the las system and significantly inhibits biofilm formation. PMID:24736783

Weng, Lixing; Zhang, Yuqian; Yang, Yuxiang; Wang, Lianhui

2014-01-01

261

Isolation of the Autoinducer-Quenching Strain that Inhibits LasR in Pseudomonas aeruginosa  

PubMed Central

Quorum sensing (QS) has been recognized as a general phenomenon in microorganisms and plays an important role in many pathogenic bacteria. In this report, we used the Agrobacterium tumefaciens biosensor strain NT1 to rapidly screen for autoinducer-quenching inhibitors from bacteria. After initial screening 5389 isolates obtained from land and beach soil, 53 putative positive strains were identified. A confirmatory bioassay was carried out after concentrating the putative positive culture supernatant, and 22 strains were confirmed to have anti-LasR activity. Finally, we determined the strain JM2, which could completely inhibit biofilm formation of Pseudomonas aeruginosa PAO1, belonged to the genus Pseudomonas by analysis of 16S rDNA. Partially purified inhibitor factor(s) F5 derived from culture supernatants specifically inhibited LasR-controlled elastase and protease in wild type P. aeruginosa PAO1 by 68% and 73%, respectively, without significantly affecting growth; the rhl-controlled pyocyanin and rhamnolipids were inhibited by 54% and 52% in the presence of 100 ?g/mL of F5. The swarming motility and biofilm of PAO1 were also inhibited by F5. Real time RT-PCR on samples from 100 ?g/mL F5-treated P. aeruginosa showed downregulation of autoinducer synthase (LasRI and rhlI) and cognate receptor (lasR and rhlR) genes by 50%, 28%, 48%, and 29%, respectively. These results provide compelling evidence that the F5 inhibitor(s) interferes with the las system and significantly inhibits biofilm formation. PMID:24736783

Weng, Lixing; Zhang, Yuqian; Yang, Yuxiang; Wang, Lianhui

2014-01-01

262

Carbonatedissolutionandgypsumprecipitationinacidsolutions Carbonate dissolution and gypsum  

E-print Network

Mine Drainage - AMD) � Bajos valores de pH � Altas concentraciones de SO4, Fe, Al y traza de metales precipitation in acid solutions. Batch experiments and in situ Atomic Force Microscope observations. Francesco-CSIC Barcelona 10.11.11 #12;Carbonatedissolutionandgypsumprecipitationinacidsolutions Aguas �cidas de Mina (Acid

Politècnica de Catalunya, Universitat

263

Isdolomiteefficientinacidminedrainagepassiveremediation? Is dolomite efficient in Acid Mine Drainage  

E-print Network

de Mina (Acid Mine Drainage AMD) · Bajos valores de pH · Altas concentraciones de SO4, Fe, Al yIsdolomiteefficientinacidminedrainagepassiveremediation? Is dolomite efficient in Acid Mine Drainage passive remediation? Francesco Offeddu Instituto de Diagnóstico Ambiental y Estudios del Agua

Politècnica de Catalunya, Universitat

264

TDS and selenium projections for the Las Vegas Wash, post completion of the Systems Conveyance and Operations Program (SCOP)  

Microsoft Academic Search

The Las Vegas Wash (Wash) is the primary drainage channel for the Las Vegas Valley. Flows from the tributaries are a major source of contaminants of particular concern to the Wash, mainly total dissolved solids (TDS) and selenium (Se). Treated wastewater effluent discharged to the Wash currently provides enough dilution to lower the TDS and to maintain selenium concentrations below

Roslyn Ryan; Xiaoping Zhou

2010-01-01

265

Sources and Concentrations of Mercury and Selenium In Compartments within the Las Vegas Wash During A Period of Rapid Change  

Microsoft Academic Search

The Las VegasWash, which drains the Las Vegas valley watershed and provides the second largest inflow to Lake Mead, is being dramatically altered with erosion control structures and wetland restoration efforts. The impact of these changes on the cycling and distribution of Hg and Se is of particular interest because of their tendency to bioaccumulate and because of a lack

James Cizdziel; Xiaoping Zhou

2005-01-01

266

Evaluacin de las prcticas de campo para los estudiantes que no puedan asistir de manera justificada a la excursin  

E-print Network

de algún aspecto concreto de los temas de Ecología Aplicada tratados en las clases de teoría. El abordar en profundidad algún tema concreto de las clases de teoría, apoyándose en bibliografía científica

Rodríguez, Miguel Ángel

267

Geometria diferencial. Problemas 1 1. Como podriamos definir una variedad con borde? Sugerencia: permite que las cartas sean  

E-print Network

: permite que las cartas sean homeomorfismos o bien sobre un abierto (o bola) de Rn o bien sobre el´iamos haber asumido que todas las cartas son difeomorfismos sobre la bola de radio 1. Probar que tambi´en podr

Enciso, Alberto

268

Red Quasars in the Las Campanas Infrared Survey Frank Masci, Carol Lonsdale, Perry Hacking, the LCIR collaboraton...  

E-print Network

Red Quasars in the Las Campanas Infrared Survey Frank Masci, Carol Lonsdale, Perry Hacking, the LCIR collaboraton... Summary We propose to search for red quasars in the Las Campanas Infrared (LCIR/near-IR appearence prior to spectroscopic follow- up. Our method will preferentially select red quasars at z>2

Masci, Frank

269

ASPECTOS CLAVE PARA EL XITO DE LAS EMPRESAS QUE REALIZAN OPERACIONES DE COMERCIO EXTERIOR MEDIANTE EL TLCAN  

Microsoft Academic Search

En el presente trabajo se muestran los aspectos clave que han permitido a las empresas del estado de Guanajuato que realizan operaciones de comercio exterior mediante el TLCAN a lograr el xito en ventas y mantener su competitividad en el mercado internacional, toda vez que para cualquier pas es fundamental que sus empresas, especialmente las pequeas y medianas, tengan una

Hctor Cuevas Vargas; David Israel Contreras Medina; Nlida Carmona Garca; Leticia Almanza Serrano

2012-01-01

270

Visita cinco museos que formen parte de la Institucin Smithsonian para celebrar los 100 aos de las Girl Scouts.  

E-print Network

únicamente cuerpos preservados de personas: también pueden ser cuerpos de animales. Los antiguos egipcios. Los científicos estudian las momias para aprender más acerca de las personas y los animales de hace momificado sobre los antiguos egipcios y su relación con los animales? Chaqueta y traje de vuelo de Sally

Mathis, Wayne N.

271

La democracia constitucional en Amrica Latina y las evoluciones recientes del presidencialismo. Memorias Encuentro del Instituto Iberoamericano de Derecho Constitucional  

Microsoft Academic Search

Siempre ser oportuno reflexionar sobre la democracia, su contenido, sus desafos, su presente y su futuro, las transformaciones y percepciones que de ella se tienen. No son pocas las preocupaciones o inquietudes que la democracia suscita en esta parte del mundo, y muestra de ello son los ms variados estudios e informes sobre el estado actual de la democracia y

Pedro Pablo Vanegas

272

Futuro de las telecomunicaciones en Mxico Cul debe ser el rol del gobierno ante los nuevos escenarios del mercado?  

Microsoft Academic Search

El objetivo del presente artculo es analizar las decisiones de poltica pblica que est llevando a cabo el gobierno de Mxico para impulsar la competencia en el mercado de telecomunicaciones. Para ello, se identifica la forma en la que est organizado este sector y se utilizan herramientas provenientes de la teora econmica de redes para evaluar las acciones de este

Fernando G. Toriz Flores

2010-01-01

273

Structure and tensile strength of LaS(1.4)  

NASA Technical Reports Server (NTRS)

The tensile strength of LaS(1.4) has been estimated by diametral stress testing at room temperature, 800 and 1300 K. Brittle, tensile-type failures were obtained at all temperatures when the crosshead speed was 0.0021 mm/s; however, a 1300 K test at 0.00085 mm/s produced plastic flow. The microstructure of LaS(1.4) consisted of two phases with beta-La2S3 comprising about 15 vol percent of the structure and gamma-La2S3 the remainder. Because of the limited amount of material available for testing, no correlation between microstructure and mechanical strength could be drawn.

Whittenberger, J. Daniel; Smoak, Richard H.

1987-01-01

274

Exposure of the marine deposit feeder Hydrobia ulvae to sediment associated LAS.  

PubMed

Linear Alkylbenzene Sulfonates (LAS) effects (mortality, egestion rate, behaviour) on the marine deposit feeder Hydrobia ulvae were assessed in whole-sediment and water-only systems. The results were combined with a bioenergetic-based kinetic model of exposure pathways to account for the observed toxicity. The 10-d LC50 value based on the freely dissolved fraction was 9.3 times lower in spiked sediment (0.152 +/- 0.001 (95% CI) mg/L) than in water-only (1.390 +/- 0.020 (95% CI) mg/L). Consequently, the actual 10-d LC50 value (208 mg/kg) was overestimated by the Equilibrium Partitioning calculation (1629 mg/kg). This suggests that the sediment associated LAS fraction was bioavailable to the snails. It could also be due to modifications in physiological parameters in absence of sediment, the organism natural substrate. PMID:19766366

Mauffret, A; Rico-Rico, A; Temara, A; Blasco, J

2010-02-01

275

Hydrological and botanical man-made changes in the Spanish wetland of Las Tablas de Daimiel  

Microsoft Academic Search

Man-made change in wetland ecosystems is mainly a 20th century process. Here, we report the changes over the last 55 years in the hydrology and botany of a Spanish semi-arid wetland, Las Tablas de Daimiel, a Ramsar site and a National Park. The landscape is valuable because of interesting waterfowl and plant species (particularly, Netta ruffina and Cladium mariscus) brought

M Alvarez-Cobelas; S Cirujano; S Snchez-Carrillo

2001-01-01

276

Acerca de este aviso Este Aviso le informar sobre las formas en que podemos  

E-print Network

de Salud a los médicos, las enfermeras, los téc- nicos, estudiantes de medicina u otro personal que información de salud que lo identifica ("Información de Salud"). Describimos también sus derechos y ciertas obligaciones que tenemos con respecto a usar y revelar la Información de Salud. La ley nos exige mantener la

Qian, Ning

277

Airborne and laboratory remote sensing applications of the CSIRO CO2 laser spectrometer MIRACO2LAS  

Microsoft Academic Search

The mid-infrared airborne CO2 laser spectrometer (MIRACO2LAS) was developed by CSIRO Division of Exploration and Mining to investigate the potential role of high spectral resolution thermal infrared (TIR) remote sensing for improved remote sensing of minerals, especially those silicate minerals that do not have diagnostic features at shorter wavelengths, such as quartz, feldspars, pyroxenes and garnets. Other objectives include testing

L. B. Whitbourn; T. J. Cudahy; J. F. Huntington; P. M. Connor; P. Mason; R. N. Phillips; Peter Hausknecht

1997-01-01

278

Quaternary Faults and Basin-fill Sediments of the Las Vegas Basin, Southern Nevada  

Microsoft Academic Search

The N-S elongated extensional Las Vegas basin, southern Nevada, contains 100's of meters of Cenozoic basin-fill sediments that are cut by several Quaternary (Q) faults. These faults define or influence the basin geometry. The basin is generally an asymmetrical half graben defined by the W-dipping, Q Frenchman Mountain fault (FMF) along its E side and a series of smaller offset

W. J. Taylor; E. Fossett; B. Luke; C. Snelson; T. Rasmussen; D. McCallen; A. Rodgers; J. Louie

2003-01-01

279

4 8 Institut de recherche pour le dveloppement Equipamientos mutualizados, a disposicin de las instituciones asociadas  

E-print Network

suelos tropicales en Montpellier Con más de 20 000 muestras de suelo procedentes de África y de Latinoamérica, el conjunto de las muestras de la UMR Ecología funcional y geoquímica de los suelos (Inra, IRD suelo así como sus funciones dentro de los agrosistemas. Estas La dinámica de colaboración, fomentada

280

ASSESSMENT OF ARSENIC AND OTHER GROUNDWATER IMPAIRMENTS IN THE GALLINAS WATERSHED, LAS VEGAS, NEW MEXICO  

Microsoft Academic Search

The Gallinas River is the primary source of water for Las Vegas, NM (population 18,000), providing 95% of its domestic water supply. Water quality studies show that the river contains elevated concentrations of arsenic (0.039 mg\\/L) during periods of elevated flow (1.98m3\\/s). Total recoverable arsenic in surface water samples is strongly correlated with total suspended solids (R2 = 0.98) and

Justin Johns-Kaysing

281

[Rn 222 levels at the "Las Caldas de Besaya" spa in Cantabria].  

PubMed

222Rn levels in the water and air of the Las Caldas de Besaya spa have been analysed during a year period. The measured values are high in the indoor air of the spa with maximum concentrations of 10(4)Bq/m3. The dose equivalent for patients and workers resulting to exposure of these radon levels were calculated and compared with the derived from the mean natural radiation. PMID:1801166

Soto, J; Delgado, M T; Fernndez, P; Gmez, J; Quinds, L S

1991-01-01

282

Solar hot water system installed at Las Vegas, Nevada. Final report  

SciTech Connect

The solar hot water system installed at LaQuinta Motor Inn Inc., at Las Vegas, Nevada is described. The Inn is a three-story building with a flat roof for installation of the solar panels. The system consists of 1200 square feet of liquid flat plate collectors, a 2500 gallon insulated vertical steel storage tank, two heat exchangers and pumps and controls. The system was designed to supply approximately 74 percent of the total hot water load.

None

1981-01-01

283

Stratigraphic and structural controls on fluorspar mineralization in northern Valle Las Norias, Coahuila, Mexico  

E-print Network

rock were analysed using petrography and scanning electron micro- scopy (SEM). Fluorspar boundary zones were analysed using SEM/micro- probe wavelength dispersive analysis. In general, it was determined that fluorspar zones are associated... Fluorspar in Valle Las Norias 15 17 19 19 21 PROCEDURES 23 Field Procedures. 23 Laboratory Procedures 23 RESULTS. 26 Mapping Pico Etereo Measured Section. 26 40 Sedimentary Petrology Fluorspar Petrology SEM: Secondary Electron Imagery...

Rapport, Eric John

2012-06-07

284

View of Lake Mead and Las Vegas, Nevada area from Sklyab  

NASA Technical Reports Server (NTRS)

A vertical view of the Lake Mead and Las Vegas, Nevada area as photographed from Earth orbit by one of the six lenses of the Itek-furnished S190-A Multispectral Photographic Facility Experiment aboard the Skylab space station. Lake Mead is water of the Colorado River impounded by Hoover Dam. Most of the land in the picture is Nevada, however, a part of the northwest corner of Arizona can be seen.

1973-01-01

285

Portrait de l'artiste en jeune chvre : Elena Poniatowska et Las siete cabritas  

E-print Network

Portrait de l'artiste en jeune chèvre : Elena Poniatowska et Las siete cabritas Aline JANQUART intitulé « ¿Por qué asesinaron a Elena Garro ? », la romancière péruvienne Patricia de Souza ne semble)1 Dans la paranoïa d'Elena Garro, il y a tout de même du vrai... Et c'est là que nous rejoignons le

Paris-Sud XI, Université de

286

-1 -jorgemercau@gmail.com gea.unsl.edu.ar Integrando al agua en las decisiones  

E-print Network

- 1 -jorgemercau@gmail.com gea.unsl.edu.ar Integrando al agua en las decisiones Producción y D E F M A M mm/mes Pp Etp ... ¿Cuándo siembro? Rendimiento potencial Oferta vs Demanda ¿Cuanta agua ? ... como me afecta la estación? ... como cambia la demanda de agua? ... como cambia oferta y acceso al agua

Nacional de San Luis, Universidad

287

En el ao 1991se creaba el Insti-tuto Universitario del Agua y las  

E-print Network

En el año 1991se creaba el Insti- tuto Universitario del Agua y las Ciencias otra denominación, se imparte el máster Gestión Sostenible y Tec- nología del Agua, adaptado al Es participan 38 profesores de universidad y 12 profesionales del sector agua. «El que se haya mantenido todo

Escolano, Francisco

288

JORNADA AGUA Y ENERGA Organiza: Instituto Universitario del Agua y de las Ciencias Ambientales (IUACA)  

E-print Network

JORNADA AGUA Y ENERGÍA Organiza: Instituto Universitario del Agua y de las Ciencias Ambientales el ciclo integral del agua Daniel Prats Rico Catedrático de Ingeniería Química 13:00-14:00 Agua Domingo Zarzo Martínez Director de I+D+i de Valoriza Agua 19:00-21:00. Marco jurídico de la explotación

Escolano, Francisco

289

Nutrient Contribution of Nonpoint Source Runoff in the Las Vegas Valley  

NASA Astrophysics Data System (ADS)

A Geographic Information System (GIS) based nonpoint source runoff model is developed for the Las Vegas Valley, Nevada, to estimate the nutrient loads during the years 2000 and 2001. The estimated nonpoint source loads are compared with current wastewater treatment facilities loads to determine the nonpoint source contribution of total phosphorus (TP), total nitrogen (TN), and total suspended solids (TSS) on a monthly and annual time scale. An innovative calibration procedure is used to estimate the pollutant concentrations for different land uses based on available water quality data at the outlet. Results indicate that the pollutant concentrations are higher for the Las Vegas Valley than previous published values for semi-arid and arid regions. The total TP and TN loads from nonpoint sources are approximately 15 percent and 4 percent, respectively, of the total load to the receiving water body, Lake Mead. The TP loads during wet periods approach the permitted loads from the wastewater treatment plants that discharge into Las Vegas Wash. In addition, the GIS model is used to track pollutant loads in the stream channels for one of the subwatersheds. This is useful for planning the location of Best Management Practices to control nonpoint pollutant loads.

Reginato, Marcelo; Piechota, Thomas C.

2004-12-01

290

The Impact of Urban Development on the Water Quality in the Las Vegas Watershed  

NASA Astrophysics Data System (ADS)

Las Vegas, one of the fastest growing cities in the nation, must have its water strictly monitored for quality as well as degree of pollution. Samples at various sites were collected to analyze the current pollution status of our water bodies (in both residential and urban settings) in the Las Vegas watershed. These gathered samples (sediment and water) were collected and analyzed for measuring total phosphorus, total organic carbon, trace metal contents, i.e., selenium, arsenic, mercury and lead, as well as pathogens, i.e., E-coli and total coliform counts. The concentrations of various pollutions will be compared among different sites as well as natural local sites (due to the natural occurrence of a few trace metals and normal levels of other measurements) and analyzed for spatial distribution for source identification and for elucidating the cause and consequence. Preliminary analyses of the results indicate that nonpoint source pollutions (golf courses, construction sites, etc.) have larger impacts than point source pollutions such as wastewater treatment effluents. This study will help understand and evaluate the degradation of the water quality caused by the increase of human actions in recent years in Las Vegas.

Yu, A.; Simmons, C.; Acharya, K.

2009-12-01

291

Surficial geology and distribution of post-impoundment sediment in Las Vegas Bay, Lake Mead  

USGS Publications Warehouse

Sidescan sonar imagery and seismic-reflection profiles were collected in the northwestern part of Las Vegas Bay to map the distribution and volume of sediment that has accumulated in this part of Lake Mead since impoundment. The mapping suggests that three ephemeral streams are the primary source of this sediment, and of these, Las Vegas Wash is the largest. Two deltas off the mouth of Las Vegas Wash formed at different lake elevations and account for 41% of the total volume of post-impoundment sediment within the study area. Deltas off the other two washes (Gypsum and Government) account for only 6% of the total volume. The sediment beyond the front of the deltas is primarily mud, and it only occurs in valley floors, where it forms a flat-lying blanket that is mostly less than 1.5 m thick. Although a thin layer, the fine-grained sediment accounts for approximately 53% of the total post-impoundment sediment volume of 5.7 x 106 m3 that has accumulated in the study area. This sediment appears to have been transported several kilometers from the river sources by density flows.

Twichell, David C.; Cross, VeeAnn A.; Rudin, Mark J.; Parolski, Kenneth F.; Rendigs, Richard R.

2001-01-01

292

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

SciTech Connect

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 constituted approximately 3,300 ft., or roughly half of the entire Plan (Figure 2). Logistical challenges and unanticipated cost influenced the decision to terminate the project prior to completion, and re-evaluate the long-term management goals for the ALP. No dredging was conducted in the final two years of the plan (2003 and 2004).

van Hattem, M; Paterson, L

2006-01-12

293

An Aerial Radiological Survey of Selected Areas of the City of North Las Vegas  

SciTech Connect

As part of the proficiency training for the Radiological Mapping mission of the Aerial Measuring System (AMS), a survey team from the Remote Sensing Laboratory-Nellis (RSL-Nellis) conducted an aerial radiological survey of selected areas of the city of North Las Vegas for the purpose of mapping natural radiation background and locating any man-made radioactive sources. Survey areas were selected in collaboration with the City Manager's office and included four separate areas: (1) Las Vegas Motor Speedway (10.6 square miles); (2) North Las Vegas Downtown Area (9.2 square miles); (3) I-15 Industrial Corridor (7.4 square miles); and (4) Future site of University of Nevada Las Vegas campus (17.4 square miles). The survey was conducted in three phases: Phase 1 on December 11-12, 2007 (Areas 1 and 2), Phase 2 on February 28, 2008 (Area 3), and Phase 3 on March 19, 2008 (Area 4). The total completed survey covered a total of 44.6 square miles. The flight lines (without the turns) over the surveyed areas are presented in Figures 1, 2, 3, and 4. A total of eight 2.5-hour-long flights were performed at an altitude of 150 ft above ground level (AGL) with 300 feet of flight-line spacing. Water line and test line flights were conducted over the Lake Mead and Government Wash areas to ensure quality control of the data. The data were collected by the AMS data acquisition system (REDAR V) using an array of twelve 2-inch x 4-inch x 16-inch sodium iodide (NaI) detectors flown on-board a twin-engine Bell 412 helicopter. Data, in the form of gamma energy spectra, were collected continually (every second) over the course of the survey and were geo-referenced using a differential Global Positioning System. Collection of spectral data allows the system to distinguish between ordinary fluctuations in natural background radiation levels and the signature produced by man-made radioisotopes. Spectral data can also be used to identify specific radioactive isotopes. As a courtesy service, with the approval of the U.S. Department of Energy, National Nuclear Security Administration, Nevada Site Office, RSL-Nellis is providing this summary to the office of the Mayor of the City of North Las Vegas along with the gross-count-based exposure rate and man-made count contour maps and GIS shape files in electronic format on a compact disk.

Piotr Wasiolek

2008-06-01

294

Nondegraded metabolites arising from the biodegradation of commercial linear alkylbenzenesulfonate (LAS) surfactants in a laboratory trickling filter  

SciTech Connect

The degradation of a commercial linear alkylbenzenesulfonate (LAS) surfactant was examined kinetically in a trickling filter, which allowed simultaneous chemical determinations in the aqueous phase (e.g., DOC) and in the gas phase (CO{sub 2}). About 60% of the carbon applied as LAS was released as CO{sub 2}, whereas 15% remained as DOC in the eluate of acclimated trickling filters. The biomass was analyzed after the experiment, and it was found to have sorbed about 23 mg LAS/g of dry biomass; this represented about 3% of the LAS applied to the filter. The LAS and the eluates from the trickling filter were further analyzed by HPLC and UV and IR spectrometry. The residual carbon from acclimated filters contained no LAS-like material (HPLC), which was obviously subject to quantitative biotransformation. The residual material comprised > 50 polar metabolites, some of whose UV spectra differed from that of LAS, and most or all of which were sulfonated. These nondegraded metabolites included carboxylated dialkyltetralinesulfonates and sulfophenylcarboxylates. These residual materials showed no detectable toxicity to algae or Daphnia, and did not significantly lower the surface tension of water.

Koelbener, P.; Baumann, U. [Swiss Federal Inst. for Materials Testing and Research, St. Gallen (Switzerland); Leisinger, T. [ETH-Zentrum, Zuerich (Switzerland). Inst. of Microbiology; Cook, A.M. [ETH-Zentrum, Zuerich (Switzerland). Inst. of Microbiology]|[Univ. of Konstanz (Germany). Faculty of Biology

1995-04-01

295

El Informe Anual a la Nacin indica que las tasas de mortalidad por cncer continan declinando. Se observan tasas menores de cncer en las poblaciones latinas de los Estados Unidos.  

Cancer.gov

Un informe nuevo de las principales organizaciones oncolgicas de la nacin informa que el riesgo de los estadounidenses de morir por cncer contina descendiendo, y que mantiene una tendencia que comenz a principios de los aos noventa. Preguntas y respuestas

296

El objetivo fundamental del ttulo de grado en Sociologa es formar profesionales con el perfil de socilogo, con un conocimiento global en las reas relacionadas con el conocimiento cientfico de las sociedades, y con  

E-print Network

perfil de sociólogo, con un conocimiento global en las áreas relacionadas con el conocimiento científico Programas de las asignaturas: En la guía docente de cada asignatura tienes el "Programa para imprimir Sociología por la Universidad de Alicante Día de la Sociología en la UA: 14 febrero 2014 Capacitación docente

Escolano, Francisco

297

An Aerial Radiological Survey of the Las Vegas Strip and Adjacent Areas  

SciTech Connect

As proficiency training for the Radiological Mapping mission of the Aerial Measuring System (AMS), a survey team from the Remote Sensing LaboratoryNellis (RSL-Nellis) conducted an aerial radiological survey of the Las Vegas Strip and adjacent areas on December 29, 2008. This survey was one of the bi-annual surveys carried in support of the city of Las Vegas Police Department (LVPD) before significant events on the Las Vegas Strip: e.g., the annual New Years Eve and July Fourth celebrations. The AMS operation and appropriate law enforcement agencies selected this area as an appropriate urban location to exercise AMS capability for mapping environmental radiation and searching for man-made radioactive sources. The surveys covered approximately 11 square miles. Each survey required a 2.5-hour-long flight, performed at an altitude of 300 ft above ground level (AGL) at a line spacing of 600 ft. Water line and test line flights are conducted over the Lake Mead and Government Wash areas to determine the non-terrestrial background contributed by aircraft, radon, and cosmic activity, and to determine the altitude-dependent air mass correction. The data were collected by the AMS data acquisition system (REDAR V) using an array of twelve 2" x 4" x 16" sodium iodide (NaI) detectors flown on-board a twin-engine Bell 412 helicopter. Gamma energy spectral data were collected second-by-second over the survey area. This spectral data allows the system to distinguish between natural terrestrial background contributions and man-made radioisotope contributions. Spectral data can also be used to identify specific man-made radioactive isotopes. Data geo-locations were determined with a Real-Time Differential Global Positioning System (RDGPS).

Wasiolek, Piotr [NSTec

2009-02-01

298

An Aerial Radiological Survey of the City of North Las Vegas (Downtown) and the Motor Speedway  

SciTech Connect

As part of the proficiency training for the Radiological Mapping mission of the Aerial Measuring System (AMS), a survey team from the Remote Sensing Laboratory-Nellis (RSL-Nellis) conducted an aerial radiological survey on December 11-12, 2007, with the purpose of mapping natural radiation background and locating any man-made radioactive sources. The survey covered 19.4 square miles (9.2 square miles over the downtown area of the City of North Las Vegas and 10.2 square miles over the Las Vegas Motor Speedway [LVMS]). The flight lines over the surveyed areas are presented in Figures 1 and 2. A total of four 2.5-hour-long flights were performed at an altitude of 150 ft above ground level (AGL) with 300 ft of flight line spacing. Water line and test line flights were conducted over the Lake Mead and Government Wash areas to ensure quality control of the data. The data were collected by the AMS data acquisition system-REDAR V using an array of twelve 2-inch x 4-inch x 16-inch sodium iodide (NaI) detectors flown on-board a twin-engine Bell 412 helicopter. Data in the form of gamma energy spectra were collected continually (every second) over the course of the survey and were geo-referenced using a differential Global Positioning System. Collection of spectral data allows the system to distinguish between ordinary fluctuations in natural background radiation levels and the signature produced by man-made radioisotopes sources. Spectral data can also be used to identify specific radioactive isotopes. As a courtesy service with the approval of the U.S. Department of Energy, National Nuclear Security Administration, Nevada Site Office, RSL-Nellis is providing this summary to the office of the Mayor of City of North Las Vegas and LVMS security along with the gross counts-based exposure rate and man-made counts maps.

Piotr Wasiolek

2007-12-01

299

Polycyclic aromatic hydrocarbons in ambient air particles in the city of Las Palmas de Gran Canaria  

Microsoft Academic Search

Concentration levels, seasonal variation and winter\\/summer ratios of 11 polycyclic aromatic hydrocarbons (PAHs) in the TSP of Las Palmas de Gran Canaria city were determined. The study area is under the influence of heavy traffic (80,000 vehicles\\/day). Pyr\\/BaA, Pyr\\/Flt, B(ghi)P\\/I(cd)P and B(b+k)F\\/B(ghi)P ratios were calculated; the values of these two last suggest a strong influence of diesel fuel burning. Levels

A. Vera Castellano; J. Lpez Cancio; P. Santana Alemn; J. Santana Rodr??guez

2003-01-01

300

75 FR 60496 - Kern Valley Railroad Company-Termination of Trackage Rights-in Las Animas County, CO  

Federal Register 2010, 2011, 2012, 2013

...1069X] Kern Valley Railroad Company--Termination of Trackage Rights--in Las Animas...requesting it. The interests of railroad employees will be protected by the conditions...1\\ The petition seeks termination of trackage rights held by BNSF,...

2010-09-30

301

40 CFR 81.82 - El Paso-Las Cruces-Alamogordo Interstate Air Quality Control Region.  

...Paso-Las Cruces-Alamogordo Interstate Air Quality Control Region. 81.82 Section 81...CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions 81.82 El...

2014-07-01

302

IDENTIFICACIN Ala anterior de 26-36 mm y dorso con dos de las manchas blancas postdiscales claramente di-  

E-print Network

claramente di- vididas por un lunar oscuro, sin mancha blanca postdiscal en el espacio E4. Cara ventral del ganado ovicaprino. El ciclo es anual (especie univoltina). Los adultos se encuentran en junio (en las

García-Barros, Enrique

303

A continuous spectrophotometric assay for Pseudomonas aeruginosa LasA protease (staphylolysin) using a two-stage enzymatic reaction.  

PubMed

Pseudomonas aeruginosa LasA protease is a secreted metalloendopeptidase that can lyse Staphylococcus aureus cells by cleaving the pentaglycine bridges of their peptidoglycan. It can also degrade elastin and stimulate shedding of cell-surface proteoglycans, activities implicated in pathogenesis of P. aeruginosa infections. The activity of LasA protease can be assayed spectrophotometrically by following the reduction in turbidity of S. aureus cell suspensions. This assay, however, does not permit kinetic studies and its reproducibility is poor. Here we describe a two-stage enzymatic reaction for the continuous measurement of LasA protease activity using a defined substrate, succinyl-Gly-Gly-Phe-4-nitroanilide, supplemented with Streptomyces griseus aminopeptidase. Cleavage of the Gly-Phe bond by LasA protease is followed by hydrolysis of the product Phe-4-nitroanilide by the aminopeptidase and the rate of release of the chromophore (4-nitroaniline) is measured spectrophotometrically using a 96-well microplate reader. Activity of nanogram amounts of LasA protease could be determined within a few minutes. Furthermore, this assay permitted the determination of Km and kcat values for LasA protease, which were 0.46 mM and 11.8s(-1), respectively. Pseudomonas elastase was also active in the assay. However, it was less effective than LasA protease and its activity was inhibited by phosphoramidon. The assay is highly sensitive and reproducible, providing a convenient tool for further studies of LasA protease function(s) and mechanism of action. PMID:15113701

Kessler, Efrat; Safrin, Mary; Blumberg, Shmaryahu; Ohman, Dennis E

2004-05-15

304

Seismic Data for Evaluation of Ground Motion Hazards in Las Vegas in Support of Test Site Readiness Ground Motion  

SciTech Connect

In this report we describe the data sets used to evaluate ground motion hazards in Las Vegas from nuclear tests at the Nevada Test Site. This analysis is presented in Rodgers et al. (2005, 2006) and includes 13 nuclear explosions recorded at the John Blume and Associates network, the Little Skull Mountain earthquake and a temporary deployment of broadband station in Las Vegas. The data are available in SAC format on CD-ROM as an appendix to this report.

Rodgers, A

2008-01-16

305

Overexpression of the Brassica napus BnLAS gene in Arabidopsis affects plant development and increases drought tolerance  

Microsoft Academic Search

The GRAS proteins are a family of transcription regulators found in plants and play diverse roles in plant growth and development.\\u000a To study the biological roles of GRAS family genes in Brassica napus, an Arabidopsis LAS homologous gene, BnLAS and its two homologs were cloned from B. napus and its two progenitor species, Brassica rapa and Brassica oleracea. Relatively high

Minggui Yang; Qingyong Yang; Tingdong Fu; Yongming Zhou

2011-01-01

306

TABLA DE ADAPTACIONES DE ASIGNATURAS SUPERADAS EN EL PROGRAMA SIMULTNEO DERECHO-ADE POR LAS ASIGNATURAS DEL GRADO DE DERECHO  

E-print Network

TABLA DE ADAPTACIONES DE ASIGNATURAS SUPERADAS EN EL PROGRAMA SIMULTÁNEO DERECHO-ADE POR LAS ASIGNATURAS DEL GRADO DE DERECHO 1º CURSO DERECHO Créditos Tipo DERECHO-ADE Créditos Tipo Derecho Romano 6 FB Derecho Romano 6 FB Historia del Derecho Español y de las Instituciones 6 FB Historia del Derecho Español

Escolano, Francisco

307

Disminucin de las tasas de cncer de seno relacionada con la reduccin del uso de terapias de reemplazo hormonal  

Cancer.gov

La tasa de los casos nuevos de cncer de seno en los Estados Unidos, la cual disminuy pronunciadamente en 2003, podra estar relacionada con una disminucin nacional del uso de terapias de reemplazo hormonal. Las tasas de incidencia de cncer de seno ajustadas a la edad en mujeres de los Estados Unidos bajaron un 6.7 por ciento en 2003. Durante este mismo perodo, las recetas mdicas para terapias de reemplazo hormonal bajaron rpidamente.

308

Las Ferias Agroalimentarias de Costa Rica: espacios para promocionar la agroindustria, los productos tpicos y el turismo en los territorios rurales  

Microsoft Academic Search

Con el propsito de analizar las caractersticas y el impacto de las ferias agroalimentarias sobre la comercializacin de productos agropecuarios, la diversificacin de la produccin agroindustrial y el desarrollo de nuevas opciones de turismo en los territorios rurales, se realiz una investigacin preliminar y de tipo cualitativo de cuatro de las ferias que se realizan en Costa Rica, stas son

Marvin Blanco; German Masis

2010-01-01

309

La Administracin Pblica Nacional en la Argentina (1983-2001): el impacto de las reformas sobre su estructura y el personal 1  

Microsoft Academic Search

En este artculo se expone una revisin crtica de los fundamentos tcnico-polticos que arrai- garon en las propuestas de Reforma Administrativa imperantes desde mediados de los ochenta, as como un anlisis comprensivo de las principales transformaciones y efectos que provoca- ron su implementacin en la estructura y el empleo de la Administracin Pblica Nacional. El resultado concreto de las polticas

Andrea Lpez; Norberto Zeller

2006-01-01

310

A brief hydrologic appraisal of the July 3-4, 1975, flash flood in Las Vegas Valley, Nevada  

USGS Publications Warehouse

Heavy thunderstorm precipitation on the afternoon of July 3, 1975, between metropolitan Las Vegas and the mountains to the south, west, and north, caused flash flooding in the city area. Total storm precipitation equaled or exceeded 3 inches (76 mm) in some areas. The total storm yield on the area of significant runoff was probably between 20,000 and 25,000 acre-feet (2.5 x 107 m3 and 3.1 x 107 m3) of water. Of this amount, probably less than 3,000 acre-feet (37 x 106 m3) flowed directly to Lake Mead. Peak flows of Tropicana Wash, Flamingo Wash, Las Vegas Creek, and Las Vegas Wash were the highest ever determined. Flooding caused the loss of two lives and inflicted extensive property damage. Total damage was reportedly estimated by the Clark County Flood Control District at $4-5 million. Problems associated with sediment erosion, transportation, and deposition occurred throughout the flooded area. An unknown amount of the material transported during the flood was deposited in Lake Mead near the mouth of Las Vegas Wash. Lateral erosion appeared more prominent than vertical erosion along most major channels, except on Las Vegas Wash at Northshore Road where downcutting threatened the loss of the highway. Sediment deposits were particularly noticeable and troublesome in Flamingo Wash at Caesars Palace parking lot and on the Winterwood Golf Course near the junction of Flamingo Wash and Las Vegas Wash.

Katzer, T.L.; Glancy, Patrick A.; Harmsen, Lynn

1976-01-01

311

Machines, medication, modulation: circuits of dependency and self-care in Las Vegas.  

PubMed

The intensive entertainment infrastructure of Las Vegas is overlaid with a robust therapeutic network for those who become addicted to its technologies. Although the objectives of gambling machines and addiction therapeutics are seemingly at odds--the first work to encourage play, the second to stop it--both gear their interventions around a model of the self as a continuum of behavioral potentials that can be externally modulated. For compulsive gamblers implicated in this circuit of modulation, pharmaceutical drugs that have been prescribed to dampen cravings for machine play sometimes function as intensifiers of its effects. Caught in an intractable play between technologies of harm and technologies of care, recovering gambling addicts are challenged to assemble a technical array through which they can maintain balance; health itself, for these individuals, becomes a state of managed dependency. This essay explores the shifting terms and changing stakes of subjectivity and health in the contemporary United States by way of ethnographic research on compulsive gamblers who live and work in Las Vegas. The analysis draws on interviews with gamblers as well as on observations in local self-help groups, directed group therapy sessions, and chat rooms of Internet recovery Web sites. PMID:16944328

Schll, Natasha Dow

2006-06-01

312

Excess air during aquifer storage and recovery in an arid basin (Las Vegas Valley, USA)  

NASA Astrophysics Data System (ADS)

The Las Vegas Valley Water District in Nevada, USA, has operated an artificial recharge (AR) program since 1989. In summer 2001, observations of gas exsolving from tap water prompted a study that revealed total dissolved gas (TDG) pressures approaching 2 atm with a gas composition that it is predominantly air. Measurements of TDG pressure at well heads and in the distribution system indicated two potential mechanisms for elevated TDG pressures: (1) air entrainment during AR operations, and (2) temperature changes between the winter recharge season and the summer withdrawal season. Air entrainment during pumping was investigated by intentionally allowing the forebay (upstream reservoir) of a large pumping station to drawdown to the point of vortex formation. This resulted in up to a 0.7 atm increase in TDG pressure. In general, the solubility of gases in water decreases as the temperature increases. In the Las Vegas Valley, water that acquired a modest amount of dissolved gas during winter artificial recharge operations experienced an increase in dissolved gas pressure (0.04 atm/C) as the water warmed in the subsurface. A combination of air entrainment during AR operations and its amplification by temperature increase after recharge can account for most of the observed amounts of excess gas at this site.

Solomon, D. Kip; Cole, Erin; Leising, Joseph F.

2011-02-01

313

Seasonal subsidence and rebound in Las Vegas Valley, Nevada, observed by synthetic aperture radar interferometry  

USGS Publications Warehouse

Analyses of areal variations in the subsidence and rebound occurring over stressed aquifer systems, in conjunction with measurements of the hydraulic head fluctuations causing these displacements, can yield valuable information about the compressibility and storage properties of the aquifer system. Historically, stress-strain relationships have been derived from paired extensometer/piezometer installations, which provide only point source data. Because of the general unavailability of spatially detailed deformation data, areal stress-strain relations and their variability are not commonly considered in constraining conceptual and numerical models of aquifer systems. Interferometric synthetic aperture radar (InSAR) techniques can map ground displacements at a spatial scale of tens of meters over 100 km wide swaths. InSAR has been used previously to characterize larger magnitude, generally permanent aquifer system compaction and land subsidence at yearly and longer timescales, caused by sustained drawdown of ground-water levels that produces intergranular stresses consistently greater than the maximum historical stress. We present InSAR measurements of the typically small-magnitude, generally recoverable deformations of the Las Vegas Valley aquifer system occurring at seasonal timescales. From these we derive estimates of the elastic storage coefficient for the aquifer system at several locations in Las Vegas Valley. These high-resolution measurements offer great potential for future investigations into the mechanics of aquifer systems and the spatial heterogeneity of aquifer system structure and material properties as well as for monitoring ongoing aquifer system compaction and land subsidence.

Hoffmann, J.; Zebker, H.A.; Galloway, D.L.; Amelung, F.

2001-01-01

314

A system dynamics model to facilitate public understanding of water management options in Las Vegas, Nevada.  

PubMed

Water managers increasingly are faced with the challenge of building public or stakeholder support for resource management strategies. Building support requires raising stakeholder awareness of resource problems and understanding about the consequences of different policy options. One approach that can help managers communicate with stakeholders is system dynamics modeling. Used interactively in a public forum, a system dynamics model can be used to explain the resource system and illustrate the effects of strategies proposed by managers or suggested by forum participants. This article illustrates the process of building a strategic-level system dynamics model using the case of water management in Las Vegas, Nevada. The purpose of the model was to increase public understanding of the value of water conservation in Las Vegas. The effects of policies on water supply and demand in the system are not straightforward because of the structure of the system. Multiple feedback relationships lead to the somewhat counterintuitive result that reducing residential outdoor water use has a much greater effect on water demand than reducing indoor water use by the same amount. The model output shows this effect clearly. This paper describes the use of the model in research workshops and discusses the potential of this kind of interactive model to stimulate stakeholder interest in the structure of the system, engage participant interest more deeply, and build stakeholder understanding of the basis for management decisions. PMID:12710919

Stave, Krystyna A

2003-04-01

315

On an LAS-integrated soft PLC system based on WorldFIP fieldbus.  

PubMed

Communication efficiency is lowered and real-time performance is not good enough in discrete control based on traditional WorldFIP field intelligent nodes in case that the scale of control in field is large. A soft PLC system based on WorldFIP fieldbus was designed and implemented. Link Activity Scheduler (LAS) was integrated into the system and field intelligent I/O modules acted as networked basic nodes. Discrete control logic was implemented with the LAS-integrated soft PLC system. The proposed system was composed of configuration and supervisory sub-systems and running sub-systems. The configuration and supervisory sub-system was implemented with a personal computer or an industrial personal computer; running subsystems were designed and implemented based on embedded hardware and software systems. Communication and schedule in the running subsystem was implemented with an embedded sub-module; discrete control and system self-diagnosis were implemented with another embedded sub-module. Structure of the proposed system was presented. Methodology for the design of the sub-systems was expounded. Experiments were carried out to evaluate the performance of the proposed system both in discrete and process control by investigating the effect of network data transmission delay induced by the soft PLC in WorldFIP network and CPU workload on resulting control performances. The experimental observations indicated that the proposed system is practically applicable. PMID:21889140

Liang, Geng; Li, Zhijun; Li, Wen; Bai, Yan

2012-01-01

316

Quaternary Faults and Basin-fill Sediments of the Las Vegas Basin, Southern Nevada  

NASA Astrophysics Data System (ADS)

The N-S elongated extensional Las Vegas basin, southern Nevada, contains 100's of meters of Cenozoic basin-fill sediments that are cut by several Quaternary (Q) faults. These faults define or influence the basin geometry. The basin is generally an asymmetrical half graben defined by the W-dipping, Q Frenchman Mountain fault (FMF) along its E side and a series of smaller offset E-dipping faults to the W. The N terminus of the basin is controlled by the Las Vegas Valley shear zone, along which the majority of the offset occurred prior to the Q. Here, we asses the influence of the Q faults on the distribution of the sedimentary units. Well, exposure, seismic reflection and seismic refraction data show that sedimentary units of different grain sizes or seismic velocity dominate different parts of the basin. Sections dominated by coarse clastic deposits occupy a narrow area along the E side of the basin. Coarse clastic sediments are mixed with finer grained sediments in a broader area along the W side of the basin. Based on provenance and alluvial fan distribution, the coarse deposits along the E side of the basin appear to be trapped in close proximity to the W-dipping FMF. The coarse-grained deposits along the opposite, W side of the basin, are sourced from the nearby Spring Mountains. Because of the structural asymmetry of the basin, these sediments traveled farther from their source area than those on the E side. Some of these E-dipping faults influence the depth to Paleozoic bedrock and some faults form small sub-basins filled with finer grained sediments. Along a WNW trend near the center of the basin and near the present-day Las Vegas Wash, a change in the grain size distribution occurs up stratgraphic section: continuous clay layers are less common and coarse-grained deposits are more common. This difference may reflect a change from internal drainage early in the basin history to external drainage through the Las Vegas Wash in the latter history of the basin-fill sedimentation. This interpretation implies that the FMF was breached by a wash connected to the Colorado River drainage system during basin development. The basin fill deposits suggest an early history of alluvial fan dominated deposits showing internal drainage. That depositional system was followed by E- and W-sloping alluvial fans cut by a NW-trending external drainage system that probably flowed to the Colorado River. The greatest structural influence on sediment distribution was from the Q FMF on the E side of the basin and the dominantly Miocene Las Vegas Valley shear zone on the north, but the structural influence is reduced as Colorado River system and base level imposes on the basin up section.

Taylor, W. J.; Fossett, E.; Luke, B.; Snelson, C.; Rasmussen, T.; McCallen, D.; Rodgers, A.; Louie, J.

2003-12-01

317

Crystal Structure of the LasA Virulence Factor from Pseudomonas aeruginosa: Substrate Specificity and Mechanism of M23 Metallopeptidases  

SciTech Connect

Pseudomonas aeruginosa is an opportunist Gram-negative bacterial pathogen responsible for a wide range of infections in immunocompromized individuals and is a leading cause of mortality in cystic fibrosis patients. A number of secreted virulence factors, including various proteolytic enzymes, contribute to the establishment and maintenance of Pseudomonas infection. One such is LasA, an M23 metallopeptidase related to autolytic glycylglycine endopeptidases such as Staphylococcus aureus lysostaphin and LytM, and to DD-endopeptidases involved in entry of bacteriophage to host bacteria. LasA is implicated in a range of processes related to Pseudomonas virulence, including stimulating ectodomain shedding of the cell surface heparan sulphate proteoglycan syndecan-1 and elastin degradation in connective tissue. Here we present crystal structures of active LasA as a complex with tartrate and in the uncomplexed form. While the overall fold resembles that of the other M23 family members, the LasA active site is less constricted and utilizes a different set of metal ligands. The active site of uncomplexed LasA contains a five-coordinate zinc ion with trigonal bipyramidal geometry and two metal-bound water molecules. Using these structures as a starting point, we propose a model for substrate binding by LasA that explains its activity against a wider range of substrates than those used by related lytic enzymes, and offer a catalytic mechanism for M23 metallopeptidases consistent with available structural and mutagenesis data. Our results highlight how LasA is a structurally distinct member of this endopeptidase family, consistent with its activity against a wider range of substrates and with its multiple roles in Pseudomonas virulence.

Spencer, James; Murphy, Loretta M.; Conners, Rebecca; Sessions, Richard B.; Gamblin, Steven J. (Wales); (Bristol Med Sci); (NIMR)

2010-09-21

318

Aerosol Optical Properties of Smoke from the Las Conchas Wildfire, Los Alamos, NM  

NASA Astrophysics Data System (ADS)

The Las Conchas wildfire in Northern New Mexico started on June, 26 2011 and spread rapidly, eventually burning an area of 634 km2 (245 mi2). Due to the close proximity to the fire, the Los Alamos National Laboratory (LANL) was shut down and the town evacuated for several days. Immediately after LANL reopened (7/6/2011) the Earth and Environmental Sciences Division (EES-14) attained unique measurements of the smoke by sampling the ambient air. Three Integrated Photoacoustic/Nephelometer Spectrometers (DMT Inc.) were set up to measure aerosol light absorption and scattering coefficients. A University of Northwest Switzerland thermodenuder was used to remove compounds that are volatile at temperatures up to 200C. The aerosol's optical properties were measured before and after denuding the sample at 405nm (blue), 532nm (green), 781nm (red), and for non-denuded particles also at 375nm (ultraviolet). The aerosol size distributions were measured after the denuder with a Laser Aerosol Spectrometer (LAS, TSI Inc.) and black carbon was measured with a Single Particle Soot Photometer (SP2, DMT Inc.). Additionally, ambient measurements of Total Particulate Matter (PM2.5 and PM10) were collected continuously at the LANL air monitoring stations. These measurements are used in conjunction with numerical simulations to determine the bulk optical properties of the aerosol. Aerosols in wildfire smoke are composed of organic and black carbon (soot) particles that are formed during wood combustion and pyrolysis. The optical properties of the smoke particles are complex and lead to large uncertainties in assessing the global climate. During the measurement period, the Las Conchas fire provided very high particle concentrations (up to 200 ?g/m3) that were exploited to investigate their optical properties. By heating the particles to temperatures ranging from 75 to 200C in the denuder, volatile organics were removed and the optical properties of the remaining particles were measured. Denuding of the aerosols, removed the outer organic coatings leaving behind the inner core of black carbon (soot) and any compounds that did not volatize completely. By simultaneously measuring the optical properties of the non-denuded as well as the denuded aerosol, we can study how the coatings affect the optical properties. The absorption coefficient measurements showed that coatings can cause an increase or decrease in absorption. The photoacoustic measurements were also combined with SP2 measurements to gain a mechanistic understanding of the effect of composition on the mass light absorption cross-sections of carbonaceous aerosols emitted by fires.

Gorkowski, K.; Dubey, M. K.; Flowers, B. A.; Aiken, A. C.; Klein, B. Z.; Mazzoleni, C.; Sharma, N.; China`, S.

2011-12-01

319

The Proteus aircraft and NASA Dryden's T-34 in flight over Las Cruces, New Mexico.  

NASA Technical Reports Server (NTRS)

The unique Proteus aircraft served as a test bed for NASA-sponsored flight tests designed to validate collision-avoidance technologies proposed for uninhabited aircraft. The tests, flown over southern New Mexico in March, 2002, used the Proteus as a surrogate uninhabited aerial vehicle (UAV) while three other aircraft flew toward the Proteus from various angles on simulated collision courses. Radio-based 'detect, see and avoid' equipment on the Proteus successfully detected the other aircraft and relayed that information to a remote pilot on the ground at Las Cruces Airport. The pilot then transmitted commands to the Proteus to maneuver it away from the potential collisions. The flight demonstration, sponsored by NASA Dryden Flight Research Center, New Mexico State University, Scaled Composites, the U.S. Navy and Modern Technology Solutions, Inc., were intended to demonstrate that UAVs can be flown safely and compatibly in the same skies as piloted aircraft.

2002-01-01

320

Prevalence of ectoparasitic arthropods on wild animals and cattle in the Las Merindades area (Burgos, Spain).  

PubMed

This paper reports the prevalence of ectoparasitic arthropods in sampled groups of wild (n= 128; 16 species) and domestic (n= 69; 3 species) animals in the Las Merindades area of the Province of Burgos, Spain. The study revealed that wild animals were more infested and with a wider variety of ectoparasites than domestic animals. The parasitic prevalence was 67% for wild animals and 48% for livestock. In this way, 39% of animals were infected by ticks. Ixodes ricinus and Ixodes hexagonus were the most prevalent species whereas Dermacentor reticulatus showed affinity for the fox and wolf. The overall prevalence of parasitisation by fleas was 27%. Ctenophthalmus spp. showed the wider range host in wild animals, while Pulex irritans was the most frequent specie found. The parasitic prevalences by lice (Trichodectes melis, Trichodectes canis and Trichodectes mustelae) and by mite (Neotrombicula spp., Laelaps agilis and Sarcoptes scabiei) were 4% and 12%, respectively. In both cases only wild animals were found parasited. PMID:21894267

Domnguez-Peafiel, G; Gimnez-Pardo, C; Gegndez, Mi; Lled, L

2011-08-01

321

Prevalence of ectoparasitic arthropods on wild animals and cattle in the Las Merindades area (Burgos, Spain)  

PubMed Central

This paper reports the prevalence of ectoparasitic arthropods in sampled groups of wild (n = 128; 16 species) and domestic (n = 69; 3 species) animals in the Las Merindades area of the Province of Burgos, Spain. The study revealed that wild animals were more infested and with a wider variety of ectoparasites than domestic animals. The parasitic prevalence was 67% for wild animals and 48% for livestock. In this way, 39% of animals were infected by ticks. Ixodes ricinus and Ixodes hexagonus were the most prevalent species whereas Dermacentor reticulatus showed affinity for the fox and wolf. The overall prevalence of parasitisation by fleas was 27%. Ctenophthalmus spp. showed the wider range host in wild animals, while Pulex irritans was the most frequent specie found. The parasitic prevalences by lice (Trichodectes melis, Trichodectes canis and Trichodectes mustelae) and by mite (Neotrombicula spp., Laelaps agilis and Sarcoptes scabiei) were 4% and 12%, respectively. In both cases only wild animals were found parasited. PMID:21894267

Domnguez-Peafiel, G.; Gimnez-Pardo, C.; Gegndez, M.I.; Lled, L.

2011-01-01

322

Late Neandertals in Southeastern Iberia: Sima de las Palomas del Cabezo Gordo, Murcia, Spain  

PubMed Central

Middle Paleolithic fossil human remains from the Sima de las Palomas in southeastern Iberia (dated to ?43,00040,000 calendar years before present) present a suite of derived Neandertal and/or retained ancestral morphological features in the mandibular symphysis, mandibular ramus, dental occlusal morphology, and distal hand phalanx. These traits are combined with variation in the mandibular corpus, discrete dental morphology, tooth root lengths, and anterior dental size that indicate a frequency difference with earlier Iberian and more northern European Neandertals. The Palomas Neandertals therefore confirm the late presence of Neandertals associated with the Iberian persistence of the Middle Paleolithic, but suggest microevolutionary processes and/or population contact with contemporaneous modern humans to the north. PMID:19074275

Walker, Michael J.; Gibert, Josep; Lopez, Mariano V.; Lombardi, A. Vincent; Perez-Perez, Alejandro; Zapata, Josefina; Ortega, Jon; Higham, Thomas; Pike, Alistair; Schwenninger, Jean-Luc; Zilhao, Joao; Trinkaus, Erik

2008-01-01

323

La frontera a alto corrimiento al rojo historia de la formacion de las galaxias  

E-print Network

This review presents a brief discussion of the theory of Cold Dark Matter of structure formation in the universe, describing the main processes determining the power spectrum, the non-linear gravitational collapse, the formation of galaxies and the evolution of the intergalactic medium. Recent advances in the observations of high redshift galaxies, and their interpretation in the context of this theory, are then summarized. Este art culo de revisin presenta una breve exposicin de la teor a de la Materia Invisible Fr a de la formacin de estructura en el universo, describiendo los procesos ms importantes que determinan el espectro de potencia, el colapso gravitatorio no lineal, la formacin de galaxias y la evolucin del medio intergalctico. Resumimos tambin los avances recientes en las observaciones de galaxias a alto corrimiento al rojo, y la interpretacin en el contexto de esa teor a.

Miralda-Escud, J

1999-01-01

324

Las Cumbres Observatory Global Telescope Network: Keeping education in the dark  

NASA Astrophysics Data System (ADS)

Las Cumbres Observatory Global Telescope Network (LCOGTN) is a privately-funded, non-profit organisation that is creating a cutting edge science programme paired with an innovative education programme. We are building two networks of telescopes in rings in both the Northern and Southern hemispheres for complete sky coverage, all of which will be equipped with high-quality, science-grade instrumentation. The telescopes will be completely robotic with the ability to be controlled by anyone, from anywhere with a broadband internet connection. Accompanying the observations will be a library of resources and activities including how to plan and carry out an observing session as well as several activities and project ideas to carry out in both formal and informal education settings. The goal is not to produce more astronomers, but to encourage a new understanding of science and technology that people will be able to apply to any field that is studied.

Ross, R.; Roche, P.; Roberts, S.

2008-06-01

325

Perchlorate uptake by salt cedar (Tamarix ramosissima) in the Las Vegas wash riparian ecosystem.  

PubMed

Perchlorate ion (ClO4-) has been identified in samples of dormant salt cedar (Tamarix ramosissima) growing in the Las Vegas Wash. Perchlorate is an oxidant, but its reduction is kinetically hindered. Concern over thyroid effects caused the Environmental Protection Agency (EPA) to add perchlorate to the drinking water Contaminant Candidate List (CCL). Beginning in 2001, utilities will look for perchlorate under the Unregulated Contaminants Monitoring Rule (UCMR). In wood samples acquired from the same plant growing in a contaminated stream, perchlorate concentrations were found as follows: 5-6 microg g(-1) in dry twigs extending above the water and 300 microg g(-1) in stalks immersed in the stream. Perchlorate was leached from samples of wood, and the resulting solutions were analyzed by ion chromatography after clean-up. The identification was confirmed by electrospray ionization mass spectrometry after complexation of perchlorate with decyltrimethylammonium cation. Because salt cedar is regarded as an invasive species, there are large scale programs aimed at eliminating it. However, this work suggests that salt cedar might play a role in the ecological distribution of perchlorate as an environmental contaminant. Consequently, a thorough investigation of the fate and transport of perchlorate in tamarisks is required to assess the effects that eradication might have on perchlorate-tainted riparian ecosystems, such as the Las Vegas Wash. This is especially important since water from the wash enters Lake Mead and the Colorado River and has the potential to affect the potable water source of tens of millions of people as well as irrigation water used on a variety of crops, including much of the lettuce produced in the USA. PMID:10902849

Urbansky, E T; Magnuson, M L; Kelty, C A; Brown, S K

2000-07-10

326

Characterization of stormwater discharges from Las Flores Industrial Park, Rio Grande, Puerto Rico, 1998-99  

USGS Publications Warehouse

Stormwater discharges from Las Flores Industrial Park, Rio Grande, Puerto Rico, were characterized from June 1998 to July 1999 by measuring the flow rate at two outfalls, delineating the drainage areas for each outfall, and calculating the volume of the stormwater discharges. Stormwater-discharge samples were collected and analyzed to determine the quality of the discharges. Constituent loads and loads per area were estimated for each drainage area. The studied drainage subareas covered approximately 46 percent of the total area of the Las Flores Industrial Park. Industrial groups represented in the study areas include manufacturers of textile, electronics, paper, fabricated metal, plastic, and chemical products. The concentrations of oil and grease (1 to 6 milligrams per liter), biochemical oxygen demand (4.7 to 16 milligrams per liter), total organic carbon (5.8 to 36 milligrams per liter), total suspended solids (28 to 100 milligrams per liter), and total phosphorous (0.11 to 0.78 milligrams per liter) from all the samples collected were less than the U.S. Environmental Protection Agency stormwater benchmark concentrations. Concentrations of chemical oxygen demand (15.8 to 157 milligrams per liter) and nitrate and nitrite (0.06 to 1.75 milligrams per liter) exceeded benchmark concentrations at one of the studied drainage areas. Total Kjeldahl nitrogen concentrations (1.00 to 3.20 milligrams per liter) exceeded the benchmark concentrations at the two studied drainage areas. Maximum concentrations for oil and grease, biochemical oxygen demand, chemical oxygen demand, total organic carbon, total Kjeldahl nitrogen, nitrate plus nitrite, and total phosphorous were detected in an area where electronics, plastics, and chemical products are currently manufactured. The maximum concentration of total suspended solids was detected at an area where textile, paper, plastic, chemical, and fabricated metal products are manufactured.

Rodriguez, Jose M.

2000-01-01

327

Shallow Ground Water in the Whitney Area, Southeastern Las Vegas Valley, Clark County, Nevada. Part 2. Assessment of a Proposed Strategy to Reduce the Contribution of Salts to Las Vegas Wash.  

National Technical Information Service (NTIS)

A continuing increase in the contribution of dissolved solids to Las Vegas Wash from various sources, including ground-water seepage, has resulted in the proposal of several salt-reduction strategies. One such strategy is the construction of an impoundmen...

T. J. Burbey

1993-01-01

328

Evaluating Water Supply and Water Quality Management Options for Las Vegas Valley  

NASA Astrophysics Data System (ADS)

The ever increasing population in Las Vegas is generating huge demand for water supply on one hand and need for infrastructure to collect and treat the wastewater on the other hand. Current plans to address water demand include importing water from Muddy and Virgin Rivers and northern counties, desalination of seawater with trade- payoff in California, water banking in Arizona and California, and more intense water conservation efforts in the Las Vegas Valley (LVV). Water and wastewater in the LVV are intrinsically related because treated wastewater effluent is returned back to Lake Mead, the drinking water source for the Valley, to get a return credit thereby augmenting Nevada's water allocation from the Colorado River. The return of treated wastewater however, is a major contributor of nutrients and other yet unregulated pollutants to Lake Mead. Parameters that influence the quantity of water include growth of permanent and transient population (i.e., tourists), indoor and outdoor water use, wastewater generation, wastewater reuse, water conservation, and return flow credits. The water quality of Lake Mead and the Colorado River is affected by the level of treatment of wastewater, urban runoff, groundwater seepage, and a few industrial inputs. We developed an integrated simulation model, using system dynamics modeling approach, to account for both water quantity and quality in the LVV. The model captures the interrelationships among many variables that influence both, water quantity and water quality. The model provides a valuable tool for understanding past, present and future pathways of water and its constituents in the LVV. The model is calibrated and validated using the available data on water quantity (flows at water and wastewater treatment facilities and return water credit flow rates) and water quality parameters (TDS and phosphorus concentrations). We used the model to explore important questions: a)What would be the effect of the water transported from the northern counties on the water supply and water quality of Lake Mead? b)What would be the impact of increased reuse of wastewater on return credits? c)What would be the effect of treating runoff water on the load of nutrients to Lake Mead?

Ahmad, S.

2007-05-01

329

Informe Anual a la Nacin sobre el Estado del Cncer 1975-2002 con una seccin especial sobre las tendencias de tratamiento: preguntas y respuestas  

Cancer.gov

Las organizaciones oncolgicas principales de la nacin informan que el riesgo de los estadounidenses de morir de cncer sigue disminuyendo y que las tasas de casos nuevos de cncer permanecen estables. El Informe Anual a la Nacin sobre el Estado del Cncer, de 1975 a 2002, seala que las tasas de mortalidad de cncer que se observaron para todos los cnceres combinados disminuyeron 1,1 por ciento por ao de 1993 a 2002.

330

GUA DE ACOGIDA PARA EL PERSONAL DE LA UNIVERSIDAD DE ALICANTE Facilitar la integracin de las personas que se incorporen la organizacin de la UA y la  

E-print Network

de las personas que se incorporen la organización de la UA y la realización de sus funciones durante integración en la UA". En los últimos años, la organización de las sesiones de acogida para el PAS de nuevo estos puestos de trabajo, que se pone a disposición de quien accede a las plantillas de la UA o cambia

Escolano, Francisco

331

Las aguas de Sierra Nevada. A. Castillo (1993) 1 Captulo de libro publicado en: "Aguas de Sierra Nevada". E. Ed. EMASAGRA. ISBN: 84-604-  

E-print Network

Las aguas de Sierra Nevada. A. Castillo (1993) 1 Capítulo de libro publicado en: "Aguas de Sierra Nevada". E. Ed. EMASAGRA. ISBN: 84-604- 8103-4, 185-252. 1993 LAS AGUAS DE SIERRA NEVADA por el Dr. Antonio Castillo Martín Hidrogeólogo del Instituto Andaluz de Geología (CSIC-Univ. Granada) #12;Las aguas

Castillo, Antonio

332

[Epidemiology of sexually transmitted diseases in the mine area of Las Claritas, Bolivar State, Venezuela].  

PubMed

The primordial objective of this study was to carry out an epidemiological analysis of sexually transmitted diseases (STD) in terms of sensed morbidity and real morbidity in the mining region of "Las Claritas", Bolivar State, Venezuela, during the third trimester of 1998. The epidemiological characteristics of time, people and place are interlaced, giving a relationship included within the Epidemiological Triad, that represents this work's conceptual framework; defining both, the determinant and the conditioning factors of the presence of STDs in the zone. The clinical interrogatory was partially steered towards the participant's sensed morbidity. A mostly feminine population is described (65%), with a low scholarly level in the general population and a high index of foreigners among the evaluated patients; with 48.72% of stable unions in the interviewees. From 166 evaluated patients, 27.70% referred to have had some STD episode, being syphilis and blenorrhagia the most frequently reported. In the survey, there was a general hush concerning the presence of STDs; but, key informants such as the medicine retailers, revealed a higher presence of these diseases, which are wrongly treated by automedication. These are important results, since they let opened a space for the epidemiological evaluation in the zone, in the various health, sanitary, environmental and social aspects and mainly, by the individual's quality of life expectations. PMID:10961044

Gonzlez-O, N; Rodrguez-Acosta, A

2000-06-01

333

Using mixture tuned match filtering to measure changes in subpixel vegetation area in Las Vegas, Nevada  

NASA Astrophysics Data System (ADS)

In desert cities, securing sufficient water supply to meet the needs of both existing population and future growth is a complex problem with few easy solutions. Grass lawns are a major driver of water consumption and accurate measurements of vegetation area are necessary to understand drivers of changes in household water consumption. Measuring vegetation change in a heterogeneous urban environment requires sub-pixel estimation of vegetation area. Mixture Tuned Match Filtering has been successfully applied to target detection for materials that only cover small portions of a satellite image pixel. There have been few successful applications of MTMF to fractional area estimation, despite theory that suggests feasibility. We use a ground truth dataset over ten times larger than that available for any previous MTMF application to estimate the bias between ground truth data and matched filter results. We find that the MTMF algorithm underestimates the fractional area of vegetation by 5-10%, and calculate that averaging over 20 to 30 pixels is necessary to correct this bias. We conclude that with a large ground truth dataset, using MTMF for fractional area estimation is possible when results can be estimated at a lower spatial resolution than the base image. When this method is applied to estimating vegetation area in Las Vegas, NV spatial and temporal trends are consistent with expectations from known population growth and policy goals.

Brelsford, Christa; Shepherd, Doug

2013-09-01

334

Giant gas bubbles in a rheomorphic vent fill at the Las Caadas caldera, Tenerife (Canary Islands)  

NASA Astrophysics Data System (ADS)

During rheomorphism subsequent to fallout deposition, a portion of the densely welded fallout of the La Grieta Member flowed back into the vent from where it was erupted, while the rest of it flowed down the outer slopes of the Las Caadas caldera in Tenerife. The welded fallout and conduit-vent structure are physically connected and constitute a rare example of this type of deposits rooted to its feeder conduit and exposed in the caldera wall. The lower part of the vent-filling rheomorphic rocks shows gas bubbles and cavities that increase in size (up to 4 m) down vent. Bubbles are deformed against other bubbles, against the steep vent walls, flattened parallel to the flow foliation planes, and elongated parallel to the flow lineation and flow fold axes. The preservation of such giant bubbles, rather than their formation, seems to be a pretty unique feature of the phonolitic products investigated here and it is likely the result of the combination of factors that acted to preserve, in the surrounding of the glass transition interval, the sealing and the late stage cooling of a pressurized system. In addition, strain drop at the base of the vent-filling rheomorphic flow caused by flow stopping against vertical vent walls may have promoted rapid gas exsolution and the formation of large bubbles.

Soriano, Carles; Giordano, Daniele; Galindo, Ins; Hrlimann, Marcel; Ardia, Paola

2009-10-01

335

Posible culto al sol en los grabados rupestres de Las Hurdes (Cceres).  

NASA Astrophysics Data System (ADS)

The author presents a set of rock engravings located in the region of Las Hurdes (Cceres) a mountainous region to the west of the Central System of the Iberian Peninsula, which present some characteristics different from the other rock engravings known in the Pennsula. In first place the total lack of a narrative character must be underlined, implying that the idea is transmitted through symbols. Essentially the set is formed by geometric scenes, mainly cycles associated with pictures of steps and standing stones. There do exist several schematic motives of weapons and feet as well. On one of the rocks there exists a Roman inscription. The study centers on the circular motives and their associations with other geometric motives, which suggest a possible solar cult, especially in view of the steps which can define the image of a cart, which could be identified with the image of the solar cart. Similarly, on other rock there appear a series of five-spiked stars associated in one case to weapons and in another with foot prints, which provide evidence for a solar cult. In any case, the symbolic character of the figures represented seems to imply the abstraction of a cult, with a magic religious character, in which the idea of the star cult presides the rock symbolism. From the study of the arms represented and because of the Roman inscription one could assign to the set of engravings a chronology which could go from the megalithic to the time of romanization.

Sevillano, C.

336

La frontera a alto corrimiento al rojo: historia de la formacio'n de las galaxias  

E-print Network

This review presents a brief discussion of the theory of Cold Dark Matter of structure formation in the universe, describing the main processes determining the power spectrum, the non-linear gravitational collapse, the formation of galaxies and the evolution of the intergalactic medium. Recent advances in the observations of high redshift galaxies, and their interpretation in the context of this theory, are then summarized. Este art\\'\\i culo de revisi\\'on presenta una breve exposici\\'on de la teor\\'\\i a de la Materia Invisible Fr\\'\\i a de la formaci\\'on de estructura en el universo, describiendo los procesos m\\'as importantes que determinan el espectro de potencia, el colapso gravitatorio no lineal, la formaci\\'on de galaxias y la evoluci\\'on del medio intergal\\'actico. Resumimos tambi\\'en los avances recientes en las observaciones de galaxias a alto corrimiento al rojo, y la interpretaci\\'on en el contexto de esa teor\\'\\i a.

Jordi Miralda-Escude

1999-10-29

337

Servicio de Referencia Digital en Bibliotecas de Ciencia y Tecnologa: alternativas para las prestaciones  

E-print Network

Referencia digital: servicio de referencia que se brinda utilizando distintos medios de comunicacin digitales para la interaccin usuario-referencista. Referencia virtual: servicio de referencia iniciado electrnicamente, a menudo en tiempo real, donde los usuarios emplean computadoras u otra tecnologa de Internet para comunicarse con los bibliotecarios, sin estar fsicamente presentes. Los canales de comunicacin usados frecuentemente en referencia virtual incluyen videoconferencia, servicios de voz en Internet, correo electrnico y mensajera instantnea. Aunque es frecuente la utilizacin de fuentes en lnea para la provisin del servicio de referencia virtual, el uso de fuentes electrnicas en la bsqueda de respuestas no es en s misma referencia virtual. El seguimiento de las consultas de referencia virtual se hace a menudo por telfono, fax o correo electrnico, an cuando esos modos de comunicacin no son considerados virtuales American Library Association. MARS Ad Hoc Committee on Virtual Reference Guidelines. (2003). Draft guidelines for implementing and maintaining virtual services. Referencia digital Referencia virtual Referencia en lnea Terminologa variada y an no consolidada: Ask a librarian (u otro especialista) Referencia permanente (24/7) Referencia en tiempo real Los conceptos son bastante diferentes; sin embargo, estas expresiones suelen considerarse intercambiables. En general se aplican a servicios de referencia que utilizan tecnologa digital para la comunicacin con los usuarios, principalmente a travs de Internet. Un glosario de trminos relacionados con RD:

Pedro Falcato; Sistemas Asincrnicos; Correo Electrnico

338

Talleres del primer cuatrimestre. Curso 2013-2014 LAS TARDES DE CINE. CINE EN VERSIN ORIGINAL EN EL MACA  

E-print Network

Talleres del primer cuatrimestre. Curso 2013-2014 1 LAS TARDES DE CINE. CINE EN VERSI?N ORIGINAL EN: 88 min. #12;Talleres del primer cuatrimestre. Curso 2013-2014 2 12 de diciembre Un pez llamado Wanda EVALUACI?N PROPUESTA POR EL PROFESOR *REALIZAR LA ENCUESTA DE SATISFACCI?N DEL CURSO #12;Talleres del primer

Escolano, Francisco

339

R R LAS VEGAS FIGHTS CHILDHOOD CANCER WITH A ST. BALDRICK'S HEAD-SHAVING FUNDRAISER MARCH 2  

E-print Network

RÍ RÁ LAS VEGAS FIGHTS CHILDHOOD CANCER WITH A ST. BALDRICK'S HEAD-SHAVING FUNDRAISER MARCH 2 Tweet it: Support @BaldVegas and go bald to fight childhood cancer at @RiRaVegas March 2 #BaldVegas LINK promising research to find cures for childhood cancers and give survivors long and healthy lives. Starting

Ahmad, Sajjad

340

Cambios en el Mundo del Trabajo y la Salud de Las Mujeres: Una Revision desde America Latina  

E-print Network

en Malinalco: la salud al margen de la medicina, Mxico, Elmedicina oriental los servicios y las tcnicas para fomentar la saludsalud y la enfermedad (socializacin, nutricin, higiene, remedios, modos de atencin y cuidado) la atencin de determinadas condiciones segn la medicina

Rubin-Kurtzman, Jane R.; Denman Champion, Catalina A.; Monteverde, Gabriela Grijalva

2006-01-01

341

LOS DESAFOS INCONCLUSOS DE LA SALUD Y LAS REFLEXIONES PARA EL FUTU- RO EN UN MUNDO GLOBALIZADO  

Microsoft Academic Search

RESUMEN: Hace algunas dcadas se tena la certeza que al ao 2000, la medicina y la ciencia iban a erradicar las enfermedades infecciosas. La realidad ha sido otra: la emer- gencia y la reemergencia de enfermedades infecciosas, demuestran lo contrario. Los microorganismos se han globalizado y modernizado y adaptado, como consecuencia de la intervencin humana sobre el medio ambiente y

Jaime Llambas Wolff

2003-01-01

342

IEEE/RSJ Int. Conf. on Intelligent Robots and Systems October 27-31, 2003. Las Vegas, NV (US)  

E-print Network

IEEE/RSJ Int. Conf. on Intelligent Robots and Systems October 27-31, 2003. Las Vegas, NV (US) Inevitable Collision States A Step Towards Safer Robots? Thierry Fraichard Inriaa Rhône-Alpes & Gravirb 655 av. de l'Europe, Montbonnot, 38334 St Ismier Cedex, France http://www.inrialpes.fr/sharp/people

Paris-Sud XI, Université de

343

Escasas Evidencias de las Bacterias Lcticas del Yo gur en Heces Humanas tras Consumo Diario de Yogur en Voluntarios Sanos  

Microsoft Academic Search

10 yogur (15 das) en 114 voluntarios sanos. Las tcni cas empleadas han sido cultivos microbiolgico clsicos, PCR con cebadores especfi cos para estas bacterias e hibridacin de ADN con sondas especficas. El diseo del estudio fue prospectivo y de doble ciego. Se obtuvieron resultados consistenteme nte negativos en los cultivos microbiolgicos, as como en la deteccin especfic a del

Rosa del Campo; Daniel Bravo; Rafael Cantn; Patricia Ruiz-Garbajosa; Raimundo Garca-Albiach; Alejandra Montesi-Libois; Francisco-Javier Yuste; Victor Abraira; Fernando Baquero

344

CONSIDERACIONES ACERCA DE LOS EPHEMEROPTERA, ODONATA Y PLECOPTERA DEL COTO NACIONAL DE LAS SIERRAS DE CAZORLA Y  

E-print Network

CONSIDERACIONES ACERCA DE LOS EPHEMEROPTERA, ODONATA Y PLECOPTERA DEL COTO NACIONAL DE LAS SIERRAS, 1981(1983). Consideraciones acerca de los Ephe- meroptera, Odonata y Plecoptera del Coto Nacional de in the National Game Reserve of the Cazorla and Segura mountains. The orders Ephemeroptera, Odonata and Plecoptera

Herrera, Carlos M.

345

What Happens in Vegas Does "Not" Stay in Vegas: Youth Leadership in the Immigrant Rights Movement in Las Vegas, 2006  

ERIC Educational Resources Information Center

Students calling themselves the Las Vegas Activist Crew shut down the city's famed Strip on May 1, 2006, with an immigrant rights protest that was one of the largest demonstrations in Nevada's history. This research analyzes the ways that students engage in activism to improve their own social conditions and those of their communities. The

Revilla, Anita Tijerina

2012-01-01

346

Preliminary information on ambient concentrations measured at the Las Vegas National Near-Road MSAT study site  

EPA Science Inventory

This paper provides preliminary information on the trends in ambient concentrations observed near a heavily traveled highway in Las Vegas, Nevada. As part of a joint effort by the U.S. Environmental Protection Agency (EPA) and Federal Highway Administration, an air monitoring pro...

347

Work in Progress: Universidad de las Amricas, Puebla Quality Enhancement Plan: Enhancing Critical Thinking Skills in Our Undergraduate Students  

Microsoft Academic Search

Universidad de las Americas, Puebla (UDLA) is a Mexican private institution. Since 1959, the Commission on Colleges of the Southern Association of Colleges and Schools (SACS) has accredited UDLA in the US. SACS requires every institution to develop an acceptable Quality Enhancement Plan (QEP) regarding student learning, and show that is part of an ongoing planning and evaluation process. UDLA

Enrique Palou

2006-01-01

348

DERECHO E INNOVACIN METODOLGICA PARA LA ADQUISICIN DE LAS COMPETENCIAS Y HABILIDADES EN EL TITULO DE GRADO EN TRABAJO SOCIAL  

Microsoft Academic Search

El artculo presenta, en primer lugar, la estrecha relacin entre el Derecho y el Trabajo Social y, en segundo lugar, la metodologa innovadora en la docencia de las prcticas curriculares del Titulo de Grado de Trabajo Social de la Universidad de Murcia que aglutina la cooperacin docente, profesional e institucional. El objetivo del Titulo es formar profesionales preparados para desarrollar

Enrique Pastor Seller

2011-01-01

349

Proceso del desarrollo exportador de las empresas industriales espaolas que participan en un consorcio de exportacin: un estudio de caso  

Microsoft Academic Search

El proceso de internacionalizacin ha dejado de ser visto como una aventura individual por parte de las empresas, porque cada vez se convierten en parte de una red de acuerdos que trascienden fronteras. Por lo tanto, el camino directo a la proyeccin internacional ha sido reemplazado por nuevos mtodos de cooperacin; de tal forma que, la eleccin de los socios,

Piedad Cristina Martnez Carazo

2003-01-01

350

Submitted to HCII 2005, Las Vegas, USA Downloaded from http://groups.inf.ed.uk/standup/publications.html  

E-print Network

Submitted to HCII 2005, Las Vegas, USA Downloaded from http://groups experimentation with humorous ideas. Language-impaired children and adolescents have been found to have significantly poorer comprehension of humour than their peers with typical language development (O'Mara, 2004

Ritchie, Graeme

351

Reflexiones acerca de la presencia de las tecnologas de la informacin y la comunicacin en la cultura de los estudiantes  

Microsoft Academic Search

En el entorno sociocultural de inicios del siglo XXI es cada vez mayor la relacin de los seres humanos con las llamadas Tecnologas de la Informacin y la Comunicacin (TIC). Si bien es cierto que la preocupacin por perfeccionar y agilizar la comunicacin ha sido una constante en el hombre desde sus orgenes, no hay dudas de que a partir

Roco Dalia Rodrguez Gutirrez; Raisa Torres Ruiz

2009-01-01

352

Developing Fieldwork in Social and Cultural Geography: Illustrations from a Residential Field Class in Los Angeles and Las Vegas.  

ERIC Educational Resources Information Center

Argues that fieldwork develops student understanding of various concerns in social and cultural geography. Recommends using a new approach that focuses on the role of fieldwork in the research process and illustrates this approach by describing an account of a residential field class to Los Angeles (California) and Las Vegas (Nevada). (CMK)

May, Jon

1999-01-01

353

La continuidad y el cambio de las migraciones entre Mxico y Estados Unidos: una interpretacin desde Mxico  

Microsoft Academic Search

El tema de los movimientos de poblacin entre pases ha cobrado una importancia mayor tanto por el crecimiento numrico de los migrantes, como por las diversas implicaciones que ese fenmeno tiene desde varias perspectivas. A diferencia del pasado, al tema migratorio se le han aadido ahora otros que tienen que ver con los derechos humanos, laborales y civiles, adems de

Gustavo Verduzco Igarta

2005-01-01

354

DISYUNTIVAS EN LAS CONCEPCIONES SOBRE AUTONOM?A Y BENEFICENCIA QUE AFECTAN LA TERAP?UTICA DEL INTENTO SUICIDA1  

PubMed Central

El objetivo del trabajo es conocer las disyuntivas entre los principios de beneficencia y autonoma, que se presentan en la relacin mdico-paciente, durante la teraputica del intento de suicidio. La investigacin se realiz en dos hospitales psiquitricos de la Ciudad de Mxico. La muestra incluy a tres sujetos con intento de suicidio, mayores de 18 aos, que eran atendidos en consulta externa a causa de una lesin autoinfligida en el ltimo ao, y a tres psiquiatras que trataban a estos pacientes. La informacin se obtuvo previo consentimiento informado en entrevistas individuales. Se llev a cabo un anlisis de discurso argumentado para encontrar los significados que los participantes otorgaron a los principios bioticos y las posibles disyuntivas entre stos. Las discordancias entre la beneficencia y la autonoma estuvieron relacionadas con el beneficio del tratamiento, el respeto por los valores y las creencias de los pacientes, entre otros. Este trabajo presenta consideraciones ticas relevantes en el escenario clnico, al ofrecer al psiquiatra un anlisis biotico que le permita actuar de acuerdo con la beneficencia y respetando la autonoma del paciente frente a casos de intento de suicidio y, de esta forma procurar una mejor atencin para ellos. PMID:20830214

Mondragon, Liliana; Monroy, Zuraya; Ito, Ma. Emily; Medina-Mora, Dra. Ma. Elena

2010-01-01

355

Visin de un cientfico onclogo que aplica la investigacin a la salud humana a travs de las fronteras  

Cancer.gov

El doctor Jorge Gmez es el asesor principal del Centro para la Salud Mundial del Instituto Nacional del Cncer. Dirige la Red de Investigacin del Cncer de los Estados Unidos y Amrica Latina, la cual est realizando un estudio internacional de los factores de riesgo del cncer de mama y caractersticas en las mujeres de Amrica Latina.

356

Ambient air monitoring during the 2011 Las Conchas wildland fire near Los Alamos, U.S.A.  

SciTech Connect

Air monitoring data collected during the Las Conchas fire near the Los Alamos National Laboratory during 2011 are presented. Data included are for selected radionuclides and selected metals found in particulate matter. None of these analytes were seen at levels which exceeded any state or federal standards.

Green, Andrew A. [Los Alamos National Laboratory; Schlemann, Shea A. [Los Alamos Technical Associates; Young, Daniel L. [Los Alamos National Laboratory

2012-08-31

357

Flora dolomitcola de las Cordilleras Bticas 111Acta Botanica Malacitana 30: 111-126 Mlaga, 2005 RIQUEZA Y RAREZA  

E-print Network

Flora dolomitícola de las Cordilleras Béticas 111Acta Botanica Malacitana 30: 111-126 Málaga, 2005 reservas, endemismo, espacios naturales protegidos, flora. ABSTRACT. Floral richness and rarity rich in endemic species. The vegetation and flora of the dolomitic outcrops have not been studied from

Herrera, Carlos M.

358

A preliminary note on the first tetrapod trackways from the lithographic limestones of Las Hoyas (Lower Cretaceous, Cuenca, Spain)  

Microsoft Academic Search

Although famous as a fossil lagersttte that has produced numerous well-preserved vertebrates, recent discoveries indicate that the lithographic limestones of Las Hoyas (Calizas de la Hurguina Formation) also contain vertebrate trackways. We herein report on at least two distinctive tetrapod track types tentatively assigned to crocodilians and to turtles. Turtle tracks are isolated while the crocodile ones are forming a

Jos J. Moratalla; Martin G. Lockley; Angela D. Buscalioni; Maria A. Fregenal-Martinez; Nieves Melndez; Francisco Ortega; Bernardino P. Prez-Moreno; Esther Prez-Asensio; Jos L. Sanz; Rebecca J. Schultz

1995-01-01

359

Human-health pharmaceutical compounds in Lake Mead, Nevada and Arizona, and Las Vegas Wash, Nevada, October 2000-August 2001  

USGS Publications Warehouse

The U.S. Geological Survey and the National Park Service conducted a reconnaissance study to investigate the occurrence of selected human-health pharmaceutical compounds in water samples collected from Lake Mead on the Colorado River and Las Vegas Wash, a waterway used to transport treated wastewater from the Las Vegas metropolitan area to Lake Mead. Current research indicates many of these compounds can bioaccumulate and may adversely affect aquatic organisms by disrupting physiological processes, impairing reproductive functions, increasing cancer rates, contributing to the development of antibiotic-resistant strains of bacteria, and acting in undesirable ways when mixed with other substances. These compounds may be present in effluent because a high percentage of prescription and non-prescription drugs used for human-health purposes are excreted from the body as a mixture of parent compounds and degraded metabolite compounds; also, they can be released to the environment when unused products are discarded by way of toilets, sinks, and trash in landfills. Thirteen of 33 targeted compounds were detected in at least one water sample collected between October 2000 and August 2001. All concentrations were less than or equal to 0.20 micrograms per liter. The most frequently detected compounds in samples from Las Vegas Wash were caffeine, carbamazepine (used to treat epilepsy), cotinine (a metabolite of nicotine), and dehydronifedipine (a metabolite of the antianginal Procardia). Less frequently detected compounds in samples collected from Las Vegas Wash were antibiotics (clarithromycin, erythromycin, sulfamethoxazole, and trimethoprim), acetaminophen (an analgesic and anti-inflammatory), cimetidine (used to treat ulcers), codeine (a narcotic and analgesic), diltiazem (an antihypertensive), and 1,7-dimethylxanthine (a metabolite of caffeine). Fewer compounds were detected in samples collected from Lake Mead than from Las Vegas Wash. Caffeine was detected in all samples collected from Lake Mead. Other compounds detected in samples collected from Lake Mead were acetaminophen, carbamazepine, cotinine, 1,7-dimethylxanthine, and sulfamethoxazole.

Boyd, Robert A.; Furlong, Edward T.

2002-01-01

360

Radon and hydrogeochemical monitoring at Popocatpetl volcano, Mexico  

Microsoft Academic Search

, Mg 2+ , Na + , K + , Ca 2+ se determinaron en el laboratorio por mtodos estndares. Las especies menores boro, sulfuro y fluoruro se analizaron por colorimetra y potenciometra. Durante el perodo de estudio se observaron incrementos de las concentraciones de B, SO 4 2- y Cl - antes de algunos cambios en la actividad, en

M. A. Armienta; N. Varley; E. Ramos

2002-01-01

361

Evapotranspiration of Mixed Shrub Communities in Phreatophytic Zones of the Great Basin D.A. Devitt1, L.K. Fenstermaker2, M. Young2, B. Conrad1 and B. Bird1 1 School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 2 Desert Research Institute, Las Vegas, NV  

Microsoft Academic Search

Water limitations in the arid and semiarid regions of the southwestern United States have led many water managers of municipalities to begin the process of diversifying their water resource portfolios. Las Vegas in particular, is pursuing groundwater exportation from east central basins in Nevada. Estimating evapotranspiration (ET) is a critical component to closing hydrologic balances in these basins. As such,

D. A. Devitt; L. K. Fenstermaker; M. Young; B. Conrad; B. Bird

2009-01-01

362

Computacin de Altas Prestaciones 2.1. Algoritmos Bsicos  

E-print Network

columnas n filas n n m n n 1 1 #12;5 Tipos de matrices. Según la distribución de datos Densas Dispersas Triangulares Tridiagonal Simétrica Cada elemento de la fila i columna j (aij) igual al de la columna i fila j: double a[n][m] En array unidimensional: double *b[n*m] Fila i columna j: a[i][j] , b[i*m+j] Cuando es

Giménez, Domingo

363

The Alta Mine: A Multidisciplinary Analysis of an Acid  

E-print Network

emphasizes field measurement and analysis techniques related to soils, plants, water, and microclimate with limited amounts of extraction and small profits (Tetra Tech EM Inc., 1997). In 1999 the Montana Department oversaw a remediation project that aimed to remove mine waste that posed a human health hazard

Maxwell, Bruce D.

364

SOURCE AND PATHWAY DETERMINATION FOR BERYLLIUM FOUND IN BECHTEL NEVADA NORTH LAS VEGAS FACILITIES  

SciTech Connect

In response to the report ''Investigation of Beryllium Exposure Cases Discovered at the North Las Vegas Facility of the National Nuclear Security Administration'', published by the U.S. Department of Energy (DOE), National Nuclear Security Administration (NNSA) in August 2003, Bechtel Nevada (BN) President and General Manager Dr. F. A. Tarantino appointed the Beryllium Investigation & Assessment Team (BIAT) to identify both the source and pathway for the beryllium found in the North Las Vegas (NLV) B-Complex. From September 8 to December 18, 2003, the BIAT investigated the pathway for beryllium and determined that a number of locations existed at the Nevada Test Site (NTS) which could have contained sufficient quantities of beryllium to result in contamination if transported. Operations performed in the B-1 Building as a result of characterization activities at the Engine Maintenance, Assembly, and Disassembly (EMAD); Reactor Maintenance, Assembly, and Disassembly (RMAD); Test Cells A and C; and the Central Support Facility in Area 25 had the greatest opportunity for transport of beryllium. Investigative monitoring and sampling was performed at these sites with subsequent transport of sample materials, equipment, and personnel from the NTS to the B-1 Building. The timeline established by the BIAT for potential transport of the beryllium contamination into the B-1 Building was from September 1997 through November 2002. Based on results of recently completed swipe sampling, no evidence of transport of beryllium from test areas has been confirmed. Results less than the DOE beryllium action level of 0.2 ???g/100 cm2 were noted for work support facilities located in Area 25. All of the identified sites in Area 25 worked within the B-1 tenant's residency timeline have been remediated. Legacy contaminants have either been disposed of or capped with clean borrow material. As such, no current opportunity exists for release or spread of beryllium contamination. Historical records indicate that there are locations at the NTS which contain hazardous quantities of beryllium; however, because beryllium was not always considered a contaminant of concern, complete characterization was not performed prior to remediation efforts. Today, it is not practical to characterize Area 25 for beryllium due to the successful remediation. Analysis of sample data collected in B-1 for the BIAT was performed for the purpose of confirming past results and identifying a source of beryllium through the use of markers. The results confirmed the presence of man-made beryllium contamination in the B-1 High Bay at levels consistent with the NNSA Report. No source markers were found that would be associated with NTS historical nuclear rocket or weapons-related operations. Beryllium contamination was identified in the southwest area of the B-1 High Bay in characteristic association with materials handled during historic metal-working operations. Use of source marker analysis suggests a contributor of beryllium found in carpeted areas of the B-Complex may be naturally occurring. Naturally occurring beryllium is not regulated by Title 10 Code of Federal Regulations Part 850 (10 CFR 850) (see Appendix A). No current uncontrolled beryllium source or transport pathways have been identified as available for spread of contamination to uncontrolled areas from the NTS.

BECHTEL NEVADA

2004-07-01

365

Proximal record of the 273 ka Poris caldera-forming eruption, Las Caadas, Tenerife  

NASA Astrophysics Data System (ADS)

Lithofacies architecture analysis is applied to the most proximal exposures of the 273 ka Poris Formation, in the Diego Hernandez caldera wall of Las Caadas. Here, the succession records an opening Plinian phase followed by generation of a pyroclastic density current (PDC) that was partly blocked by near-vent topography. The upper part of the current surmounted the barrier and deposited an ignimbrite veneer. During a hiatus in energetic flow, ash and various ash aggregates were deposited from a hybrid cloud comprising parts of both the Plinian and the co-ignimbrite plumes. Phreatomagmatic explosions then generated currents rich in fine-grained lithics; current waxing with local erosion was followed by pulsing-unsteady waning, recorded in repeated sets of graded tuff. Reversion to magmatic activity was marked by hybrid deposition, as coarse pumice fallout and juvenile ballistics entered pyroclastic currents to form stratified pumice-block tuff. Increasingly energetic flow is recorded in 9 m of mainly massive lapilli tuff that includes evidence of widespread scour and bypass; lithic-rich layers record incremental onset of edifice disruption due to magma withdrawal. Laterally variable stratification and load structures show that the PDC was unsteady and highly non-uniform at times, with locally rapid aggradation of gas-rich ignimbrite. Climactic edifice disruption is marked by a lithic-block layer in erosional contact with the underlying ignimbrite, recording intense pyroclastic current activity and widespread bypass of material to distal volcano slopes. Pumice-block breccia, 10 m thick and with blocks up to 1.2 m in diameter, forms the top of the succession and registers modification of the magmatic plumbing. The timing of collapse to form a major summit depression is uncertain. However, the abrupt termination of the proximal aggradation of coarse breccia, with no record there of any waning-stage pyroclastic currents, suggests subsidence at that time, conceivably with formation of a caldera that contained late-erupted material.

Smith, Natasha J.; Kokelaar, B. Peter

2013-11-01

366

Informe Anual a la Nacin indica que los ndices generales de cncer siguen disminuyendo; su seccin especial destaca las tendencias actuales y pronsticos del cncer colorrectal  

Cancer.gov

Los ndices de casos nuevos diagnosticados y los ndices de muertes de todos los tipos de cncer combinados disminuyeron en forma considerable en el perodo ms reciente para hombres y mujeres en general, y para la mayora de las poblaciones raciales y tnicas de Estados Unidos, segn un informe de las principales organizaciones de salud y oncolgicas.

367

IMPUESTO FEDERAL A LOS SUELDOS GENERADO POR LAS MICROEMPRESAS: CASO CANCN, MXICO \\/ FEDERAL INCOME TAX ON SALARIES GENERATED BY MICRO-ENTERPRISES: CASE CANCN, MEXICO  

Microsoft Academic Search

Se plantea el objetivo de identificar, a travs de una muestra representativa de microempresas (mipyme) de sectores econmicos que dependen del turismo, cules son los rangos de sueldos y el sector a que pertenecen aquellos que generan una mayor recaudacin fiscal o, caso contrario,son mayormente subsidiados por el gobierno. Las obligaciones fiscales para las mipymes en Mxico son mltiples, por

Sergio Lagunas Puls; Miguel Angel Olivares Urbina; Natascha Tamara Post

2012-01-01

368

Geohydrologic reconnaissance of Lake Mead National Recreation Area; Las Vegas Wash to Opal Mountain, Nevada  

USGS Publications Warehouse

The study is a geohydrologic reconnaissance of about 170 square miles in the Lake Mead National Recreation Area from Las Vegas Wash to Opal Mountain, Nevada. The study is one of a series that describes the geohydrology of the recreation area and that indentifies areas where water supplies can be developed. Precipitation in this arid area is about 5 inches per year. Streamflow is seasonal and extremely variable except for that in the Colorado River, which adjoins the area. Pan evaporation is more than 20 times greater than precipitation; therefore, regional ground-water supplies are meager except near the Colorado River, Lake Mead, and Lake Mohave. Large ground-water supplies can be developed near the river and lakes, and much smaller supplies may be obtained in a few favorable locations farther from the river and lakes. Ground water in most of the areas probably contains more than 1,000 milligrams per liter of dissolved solids, but water that contains less than 1,000 milligrams per liter of dissolved solids can be obtained within about 1 mile of the lakes. Crystalline rocks of metamorphic, intrusive and volcanic origin crop out in the area. These rocks are overlain by conglomerate and mudstone of the Muddy Creek Formation, gravel and conglomerate of the older alluvium, and sand and gravel of the Chemehuevi Formation and younger alluvium. The crystalline rocks, where sufficiently fractured, yield water to springs and would yield small amounts of water to favorably located wells. The poorly cemented and more permeable beds of the older alluvium, Chemehuevi Formation, and younger alluvium are the better potential aquifers, particularly along the Colorado River and Lakes Mead and Mohave. Thermal springs in the gorge of the Colorado River south of Hoover Dam discharge at least 2,580 acre-feet per year of water from the volcanic rocks and metamorphic and plutonic rocks. The discharge is much greater than could be infiltrated in the drainage basin above the springs. Transbasin movement of ground water probably occurs , and perhaps the larger part of the spring discharge is underflow from Eldorado Valley. The more favorable sites for ground-water development are along the shores of Lakes Mead and Mohave and are the Fire Mountain, Opal Mountain to Aztec Wash, and Hemenway Wash sites. Wells yielding several hundred gallons per minute of water of acceptable chemical quality can be developed at these sites. (USGS)

Laney, R.L.

1981-01-01

369

An Evaluation of Lead Contamination in Plastic Toys Collected from Day Care Centers in the Las Vegas Valley, Nevada, USA  

Microsoft Academic Search

Childhood exposure to environmental lead continues to be a major health concern. This study examined lead content within the\\u000a plastic of childrens toys collected from licensed day care centers in the Las Vegas valley, Nevada. It was hypothesized that\\u000a the use of lead as a plastics stabilizer would result in elevated lead (?600ppm) in polyvinyl chloride plastics (PVC) compared\\u000a to

Shawn Gerstenberger

2010-01-01

370

Documentation of potential for surface faulting related to ground-water withdrawal in Las Vegas Valley, Nevada  

USGS Publications Warehouse

Leveling data collected in Las Vegas Valley are compatible with the interpretation that ongoing land-surface displacements related to ground-water withdrawal may be precursory to fault offset of the land surface. Zones of potential faulting intersect regions of intense urban development. The degree of risk and the potential economic consequences from possible surface faulting cannot be assessed adequately without additional data and analysis of the relation between surface faulting and ground-water withdrawal.

Holzer, Thomas L.

1978-01-01

371

Tratamiento ayuda a las mujeres jvenes a preservar la fertilidad durante la quimioterapia para el cncer de seno  

Cancer.gov

Las mujeres jvenes con cncer de seno (mama) lograron preservar la fertilidad durante los tratamientos del cncer con un frmaco inyectable bloqueador de hormonas que les provoc menopausia temporal. Los resultados del estudio se anunciaron hoy en el congreso anual de la Sociedad Americana de Oncologa Clnica (ASCO), y provienen del Estudio de Prevencin de la Menopausia Temprana (POEMS), patrocinado por el Instituto Nacional del Cncer (NCI).

372

Phase Behavior of Lyotropic Liquid Crystals in Linear Alkylbenzene Sulphonate (LAS) Systems in the Presence of Dilute and Concentrated Electrolyte  

Microsoft Academic Search

A linear alkylbenzene sulphonate (LAS) system is studied in the presence of water and electrolyte (Na2SO4). The samples were studied, across a broad range of concentrations of surfactant and electrolyte, using optical microscopy, differential scanning calorimetry (DSC), and small angle x-ray scattering (SAXS). The results are contrasted with electrolyte free studies performed previously, and some startling differences are observed. An

J. A. Stewart; A. Saiani; A. Bayly; G. J. T. Tiddy

2011-01-01

373

SiC nanowires reinforced MAS joint of SiC coated carbon\\/carbon composites to LAS glass ceramics  

Microsoft Academic Search

In order to improve the shear strength of the joints of carbon\\/carbon (C\\/C) composites to lithium aluminum silicate (LAS) glass ceramics, SiC coating and magnesium aluminum silicate (MAS) glass ceramics were used as transition layer and middle layer, respectively, and high quality SiC nanowires were applied as the reinforcement materials in MAS. The SiC nanowires reinforced MAS joint of SiC

Qiangang Fu; Binglin Jia; Hejun Li; Kezhi Li Yanhui Chu

374

June 18July 27* AnT 324l/391 -lAS 324l -AFR 321 African Diaspora  

E-print Network

June 18­July 27* AnT 324l/391 - lAS 324l - AFR 321 African Diaspora in the Americas Dr. João Costa in the Americas, students will have the unmatched oppor- tunity to read and debate on topics concerning black these women to face the racism, sexism, and homophobia present in Brazilian society. Criola and its partners

Hofmann, Hans A.

375

Proteja su almuerzo de los grmenes Lvese las manos con agua caliente y jabn antes de preparar el almuerzo.  

E-print Network

Proteja su almuerzo de los gérmenes · Lávese las manos con agua caliente y jabón antes de preparar botella térmica de boca ancha. Vierta agua hirviendo en la botella para calentar el interior. Luego caliente el alimento a 1650 F. Vacíe el agua caliente de la bo- tella y vierta en su interior el alimento

376

Problemtica de las aguas cidas en la FPI y monitorizacin del flujo de agua y calor a  

E-print Network

Problem�tica de las aguas �cidas en la FPI y monitorizaci�n del flujo de agua y calor a trav�s de�geno y el agua. � Los residuos de la actividad minera aceleran los procesos de oxidaci�n de sulfuros #12;� Cuando no se dispone de suficientes minerales alcalinos en el medio el agua superficial disminuye su p

Politècnica de Catalunya, Universitat

377

TABLA DE ADAPTACIONES DE ASIGNATURAS SUPERADAS EN EL PROGRAMA SIMULTNEO DERECHO-ADE POR LAS ASIGNATURAS DEL GRADO DE ADE  

E-print Network

TABLA DE ADAPTACIONES DE ASIGNATURAS SUPERADAS EN EL PROGRAMA SIMULTÁNEO DERECHO-ADE POR LAS ASIGNATURAS DEL GRADO DE ADE 1º CURSO ADE Créditos Tipo DERECHO-ADE Créditos Tipo Matemáticas I 6 FB Economía de la Empresa 6 FB Derecho de la Empresa 6 FB Derecho Mercantil I 6 OB Matemáticas II 6 FB

Escolano, Francisco

378

Three-dimensional modeling of shallow shear-wave velocities for Las Vegas, Nevada, using sediment type  

Microsoft Academic Search

A three-dimensional model of near-surface shear-wave velocity in the deep alluvial basin underlying the metropolitan area\\u000a of Las Vegas, Nevada (USA), is being developed for earthquake site response projections. The velocity dataset, which includes\\u000a 230 measurements, is interpolated across the model using depth-dependent correlations of velocity with sediment type. The\\u000a sediment-type database contains more than 1 400 well and borehole

Barbara Luke; Helena Murvosh; Wanda Taylor; Jeff Wagoner

2009-01-01

379

The U.S. Department of Energy Office of Indian Energy Policy and Programs Las Vegas, Nevada, Roundtable Summary  

SciTech Connect

LAS VEGAS EXECUTIVE SUMMARY The Las Vegas, Nevada DOE Tribal Roundtable convened on March 16th, at the Las Vegas Hilton. The meeting was hosted by the Department of Energy (DOE) Office of Indian Policy and Programs (DOE Office of Indian Energy) and facilitated by JR Bluehouse, Program Manager, Udall Foundations U.S. Institute for Environmental Conflict Resolution (U.S. Institute). Mr. Bluehouse was assisted by Tamara, Underwood, Program Assistant, U.S. Institute.Tribal leaders and representatives from multiple tribal governments and communities attended the roundtable. Tracey LeBeau, newly appointed Director of the Office of Indian Energy attended. LaMont Jackson from DOEs Office of Electricity attended. Also attending from the administration and federal agencies were Kim Teehee, Senior Policy Advisor for Native American Affairs, The White House; Charlie Galbraith, Associate Director of the Office of Public Engagement and Deputy Associate Director of the Office of Intergovernmental Affairs, The White House; Jodi Gillette, Deputy Assistant Secretary for Policy and Economic Development, the Bureau of Indian Affairs.

none,

2011-03-16

380

Analysis of the real estate market in Las Vegas: Bubble, seasonal patterns, and prediction of the CSW indices  

NASA Astrophysics Data System (ADS)

We analyze 27 house price indices of Las Vegas from June 1983 to March 2005, corresponding to 27 different zip codes. These analyses confirm the existence of a real estate bubble, defined as a price acceleration faster than exponential, which is found, however, to be confined to a rather limited time interval in the recent past from approximately 2003 to mid-2004 and has progressively transformed into a more normal growth rate comparable to pre-bubble levels in 2005. There has been no bubble till 2002 except for a medium-sized surge in 1990. In addition, we have identified a strong yearly periodicity which provides a good potential for fine-tuned prediction from month to month. A monthly monitoring using a model that we have developed could confirm, by testing the intra-year structure, if indeed the market has returned to normal or if more turbulence is expected ahead. We predict the evolution of the indices one year ahead, which is validated with new data up to September 2006. The present analysis demonstrates the existence of very significant variations at the local scale, in the sense that the bubble in Las Vegas seems to have preceded the more global USA bubble and has ended approximately two years earlier (mid-2004 for Las Vegas compared with mid-2006 for the whole of the USA).

Zhou, Wei-Xing; Sornette, Didier

2008-01-01

381

Reconciling Scale Mismatch in Water Governance, Hydro-climatic Processes and Infrastructure Systems of Water Supply in Las Vegas  

NASA Astrophysics Data System (ADS)

Water resource systems are a classic example of a common pool resource due to the high cost of exclusion and the subtractability of the resource; for common pool resources, the performance of governance systems primarily depends on how well matched the institutional arrangements and rules are to the biophysical conditions and social norms. Changes in water governance, hydro-climatic processes and infrastructure systems occur on disparate temporal and spatial scales. A key challenge is the gap between current climate change model resolution, and the spatial and temporal scale of urban water supply decisions. This gap will lead to inappropriate management policies if not mediated through a carefully crafted decision making process. Traditional decision support and planning methods (DSPM) such as classical decision analysis are not equipped to deal with a non-static climate. While emerging methods such as decision scaling, robust decision making and real options are designed to deal with a changing climate, governance systems have evolved under the assumption of a static climate and it is not clear if these methods are well suited to the existing governance regime. In our study, these questions are contextualized by examining an urban water utility that has made significant changes in policy to adapt to changing conditions: the Southern Nevada Water Authority (SNWA) which serves metropolitan Las Vegas. Like most desert cities, Las Vegas exists because of water; the artesian springs of the Las Vegas Valley once provided an ample water supply for Native Americans, ranchers and later a small railroad city. However, population growth has increased demands far beyond local supplies. The area now depends on the Colorado River for the majority of its water supply. Natural climate variability with periodic droughts has further challenged water providers; projected climate changes and further population growth will exacerbate these challenges. Las Vegas is selected as a case study due to the combined challenges of population growth and climate change, common in the arid west, and due its cooperative institutional response to these challenges, unprecedented in the arid west. To begin to disentangle this question we have analyzed the institutional arrangements and rules which govern water decision making in the Las Vegas Valley and evaluated the existing DSPM used by the SNWA and partner utilities. Presented here are the preliminary results from an ongoing project.

Garcia, M. E.; Alarcon, T.; Portney, K.; Islam, S.

2013-12-01

382

Enzymatic Depilation of Animal Hide: Identification of Elastase (LasB) from Pseudomonas aeruginosa MCM B-327 as a Depilating Protease  

PubMed Central

Conventional leather processing involving depilation of animal hide by lime and sulphide treatment generates considerable amounts of chemical waste causing severe environmental pollution. Enzymatic depilation is an environmentally friendly process and has been considered to be a viable alternative to the chemical depilation process. We isolated an extracellular protease from Pseudomonas aeruginosa strain MCM B-327 with high depilation activity using buffalo hide as a substrate. This 33 kDa protease generated a peptide mass fingerprint and de novo sequence that matched perfectly with LasB (elastase), of Pseudomonas aeruginosa. In support of this data a lasB mutant of MCM B-327 strain lacked depilatory activity and failed to produce LasB. LasB heterologously over-produced and purified from Escherichia coli also exhibited high depilating activity. Moreover, reintroduction of the lasB gene to the P. aeruginosa lasB mutant via a knock-in strategy also successfully restored depilation activity thus confirming the role of LasB as the depilating enzyme. PMID:21347249

Pandeeti, Emmanuel Vijay Paul; Pitchika, Gopi Krishna; Jotshi, Jyotsna; Nilegaonkar, Smita S.; Kanekar, Pradnya P.; Siddavattam, Dayananda

2011-01-01

383

Morphology and mechanics of large collapses: Sotano de las Golondrinas, Mexico  

NASA Astrophysics Data System (ADS)

The dynamics and mode of formation of large karst pipes are not yet fully understood. We present precise Lidar and structural field data of the 340+ m deep open karst shaft el Sotano de las Golondrinas, and test the geometry on a a simplified 2D evolution model. The Golondrinas shaft is located in the San Luis county, northeastern Mxico and is developed in massive, early cretaceous (Barremian-Coniacian) reef- limestones (El Abra/ El Doctor fm.). It is a bell-shaped breakout dome that has reached the land surface, i.e. a classical Einstrurtzdoline. The dimensions and shape makes it to an interesting case study, as it has similar dimensions as breccia-pipes encountered in many paleokarsts, but is incompletely filled, so that internal structure can be easily inspected. Second, with regard to stress mechanisms controlling roof collapse, the large dimensions (270 - 130 m diameter at the base) reduce the influence (anisotropy) of geological structures in comparison to smaller pipes (e.g. <70 m diameter). We may thus test morphology against the shape of various tectonic and gravitational stress distributions. During our field campaign in 2009, it was decided to re-map the cavity using laser (Lidar and rangefinders) in order to obtain exact dimensions and high-resolution images of morphology and geologic structure. The maximum explored depth is a fissure at -512 m with the main floor between 325 and 400 meters below the skylight entrance of 80 m diameter. Overall, the shaft is cigar-shaped and oval in outline. Its horizontal length/width ratio at floor level is about 2.31, with an azimuth of elongation of about 125 degrees true. The shaft is developed along a major, steep fracture zone (115, true) which makes up the north wall. The fracture has no detectable off-set, in all very few faults were observed. The strike of the guiding fracture, the azimuth of elongation and the direction of the least horizontal stress direction (111, true) coincide. Where it occurs, bedding is almost horizontal. A simple 2D grid model was made to test morphological evolution of collapse into a dissolving void, using dissolution rate, yield strength and bed thickness as input parameters. Breakdown processes was represented with a beam model on unsupported beds. So far, our experiments mimic the observed bottle-shaped morphology. Probability-based models of sinkhole hazard are closely related to the expected mature architecture of the collapse-pipe field. As a comparison to the Sotano de los Golondrinas, a late Paleozoic to early Mesozoic field of collapse pipes exposed on Svalbard consists of > 250-m-tall breccia-filled collapse pipes in limestone but related to deep dissolution of underlying gypsum. The average pipe diameter is 60 m, pipes are typically asymmetric by 15% of the diameter but aspect rations similar to Golondrines are not uncommon. Several of the 50 pipes reach diameters of over 150m. The lack of terrigenous material inside the pipes suggests they did not reach the surface. Collapse breccia pipes form strong vertical heterogeneities in rock properties such as porosity and permeability, matrix density, cement, mechanical strength and lithology, affecting fluid-flow characteristics on a meter to hundred-meter scale. It is rare that pipe fields are well exposed at the kilometre scale. Studies at the km scale are fundamental for understanding basic karst and collapse processes, and yield petrophysical models that can be applied predictively to natural hazards and groundwater or hydrocarbon exploitation in paleokarst settings.

Lauritzen, S.-E.; Hammer, .; Wheeler, W.; Redfield, T.; Blanco, M.; Rosales Lagarde, L.; Jamtveit, B.

2012-04-01

384

Pseudomonas aeruginosa lasB1 mutants produce an elastase, substituted at active-site His-223, that is defective in activity, processing, and secretion.  

PubMed Central

Pseudomonas aeruginosa secretes elastase in a multistep process which begins with the synthesis of a preproelastase (53.6 kDa) encoded by lasB, is followed by processing to proelastase (51 kDa), and concludes with the rapid accumulation of mature elastase (33 kDa) in the extracellular environment. In this study, mutants of P. aeruginosa were constructed by gene replacement which expressed lasB1, an allele altered in vitro at an active-site His-223-encoding codon. The lasB1 allele was exchanged for chromosomal lasB sequences in two strain backgrounds, FRD2 and PAO1, through a selectable-cassette strategy which placed a downstream Tn501 marker next to lasB1 and provided the selection for homologous recombination with the chromosome. Two lasB1 mutants, FRD720 and PDO220, were characterized, and their culture supernatants contained greatly reduced proteolytic (9-fold) and elastolytic (14- to 20-fold) activities compared with their respective parental lasB+ strains. This was primarily due to the effect of His-223 substitution on substrate binding by elastase and thus its proteolytic activity. However, the concentration of supernatant elastase antigen was also reduced (five- to sevenfold) in the mutant strains compared with the parental strains. An immunoblot analysis of cell extracts showed a large accumulation of 51-kDa proelastase within lasB1 mutant cells which was not seen in wild-type cell extracts. A time course study showed that production of extracellular elastase was inefficient in the lasB1 mutants compared with that of parental strains. This showed that expression of an enzymatically defective elastase inhibits proper processing of proelastase and provides further evidence for autoproteolytic processing of proelastase in P. aeruginosa. Unlike the parental strains, culture supernatants of the lasB1 mutants contained two prominent elastase species that were 33 and 36 kDa in size. Extracellular 51-kDa proelastase was barely detectable, even though it accumulated to high concentrations within the lasB1 mutant cells. These data suggest that production of an enzymatically defective elastase affects proper secretion because autoproteolytic processing of proelastase is necessary for efficient localization to the extracellular milieu. The appearance of reduced amounts of extracellular elastase and their sizes of 33 and 36 kDa suggest that lasB1-encoded elastase was processed by alternate, less-efficient processing mechanisms. Thus, proelastase must be processed by removal of nearly all of the 18-kDa propeptide before elastase is a protein competent for extracellular secretion. Images PMID:8320217

McIver, K S; Olson, J C; Ohman, D E

1993-01-01

385

Identification of synthetic inducers and inhibitors of the quorum-sensing regulator LasR in Pseudomonas aeruginosa by high-throughput screening.  

PubMed

We report the screening of 16,000 synthetic compounds for induction and inhibition of quorum sensing in a Pseudomonas putida N-acylated l-homoserine lactone (AHL) sensor strain engineered with the LasR transcriptional activator. LasR controls virulence gene expression in the opportunistic pathogen Pseudomonas aeruginosa and is of significant interest as a therapeutic target. Nine compounds that inhibit and 14 compounds that induce LasR activity were identified in our high-throughput screen. PMID:20935125

Borlee, Bradley R; Geske, Grant D; Blackwell, Helen E; Handelsman, Jo

2010-12-01

386

Actin patch assembly proteins Las17p and Sla1p restrict cell wall growth to daughter cells and interact withcis-Golgi protein Kre6p  

Microsoft Academic Search

The cytoplasmic tail of Kre6p, a Golgi membrane protein involved in cell wall synthesis, interacts with the actin patch assembly components Las17p and Sla1p in a two-hybrid assay, and Kre6p co-immunoprecipitates with Las17p. Kre6p showed extensive co-localization with Och1p-containing cis-Golgi vesicles. The correct localization of Kre6p requires its cytoplasmic tail, Las17p, Sla1p and Vrp1p, suggesting that the cytoplasmic tail of

Huijuan Li; Howard Bussey

2002-01-01

387

The influence of faults in basin-fill deposits on land subsidence, Las Vegas Valley, Nevada, USA  

NASA Astrophysics Data System (ADS)

The role of horizontal deformation caused by pumping of confined-aquifer systems is recognized as contributing to the development of earth fissures in semiarid regions, including Las Vegas Valley, Nevada. In spite of stabilizing water levels, new earth fissures continue to develop while existing ones continue to lengthen and widen near basin-fill faults. A three-dimensional granular displacement model based on Biot's consolidation theory (Biot, MA, 1941, General theory of three-dimensional consolidation. Jour. Applied Physics 12:155-164) has been used to evaluate the nature of displacement in the vicinity of two vertical faults. The fault was simulated as (1) a low-permeability barrier to horizontal flow, (2) a gap or structural break in the medium, but where groundwater flow is not obstructed, and (3) a combination of conditions (1) and (2). Results indicate that the low-permeability barrier greatly enhances horizontal displacement. The fault plane also represents a location of significant differential vertical subsidence. Large computed strains in the vicinity of the fault may suggest high potential for failure and the development of earth fissures when the fault is assumed to have low permeability. Results using a combination of the two boundaries suggest that potential fissure development may be great at or near the fault plane and that horizontal deformation is likely to play a key role in this development. Rsum. On considre que la dformation horizontale provoque par un pompage dans un aquifre captif joue un rle dans le dveloppement des fissures du sol en rgions semi-arides, comme la valle de Las Vegas (Nevada). Malgr des niveaux d'eau stabiliss, de nouvelles fissures du sol continuent de se dvelopper en longueur et en largeur au voisinage de failles dans les bassins sdimentaires. Un modle de dplacement granulaire tri-dimensionnel, bas sur la thorie de la consolidation de Biot (Biot, M A, 1941, General theory of three-dimensional consolidation. Jour. Applied Physics 12:155-164), a t utilis pour valuer la nature du dplacement au voisinage de deux failles verticales. La faille a t simule comme 1) une barrire de faible permabilit pour l'coulement horizontal, 2) une rupture structurale dans le milieu, mais sans obstruction de l'coulement, et 3) une combinaison des deux prcdentes conditions. Les rsultats indiquent que la barrire de faible permabilit favorise fortement le dplacement horizontal. Le plan de faille constitue aussi un lieu de subsidence diffrentielle verticale significative. Les fortes contraintes calcules au voisinage de la faille laissent penser qu'il existe un fort potentiel de rupture et le dveloppement de fissures du sol quand on suppose que la faille possde une faible permabilit. Les rsultats utilisant une combinaison des deux conditions suggrent que le dveloppement potentiel de fissures peut tre grand sur ou proximit du plan de faille et que la dformation horizontale joue vraisemblablement un rle cl dans ce dveloppement. Resumen. Se conoce la contribucin que la deformacin horizontal causada por el bombeo de sistemas acuferos confinados tienen en el desarrollo de fisuras en regiones semiridas, como es el caso del Valle de Las Vegas (Nevada, Estados Unidos de Amrica). A pesar de la estabilizacin de los niveles, se contina desarrollando nuevas fisuras, mientras las ya existentes se alargan y ensanchan cerca de las fallas de relleno de cuenca. Se ha utilizado un modelo tridimensional de desplazamiento granular basado en la teora de consolidacin de Biot (Biot, M.A., 1941. General theory of three-dimensional consolidation. J. Applied Physics, 12: 155-164) para evaluar la naturaleza del desplazamiento junto a dos fallas verticales. Se ha simulado cada falla como (1) una barrera de baja permeabilidad al flujo horizontal, (2) un hueco o ruptura estructural en el medio pero sin obstruccin al flujo de aguas subterrneas, y (3) una combinacin de las dos condiciones anteriores. Los res

Burbey, Thomas

2002-07-01

388

Hydrostratigraphic Framework of the Raton, Vermejo, and Trinidad Aquifers in the Raton Basin, Las Animas County, Colorado  

USGS Publications Warehouse

Exploration for and production of coalbed methane has increased substantially in the Rocky Mountain region of the United States since the 1990s. During 1999-2004, annual production of natural gas (coalbed methane) from the Raton Basin in Las Animas County, Colorado, increased from 28,129,515 to 80,224,130 thousand cubic feet, and the annual volume of ground water coproduced by coalbed methane wells increased from about 949 million gallons to about 2,879 million gallons. Better definition of the hydrostratigraphic framework of the Raton, Vermejo, and Trinidad aquifers in the Raton Basin of southern Colorado is needed to evaluate the long-term effects of coalbed methane development on the availability and sustainability of ground-water resources. In 2001, the U.S. Geological Survey, in cooperation with the Colorado Water Conservation Board, began a study to evaluate the hydrogeology of the Raton Basin in Huerfano and Las Animas Counties, Colorado. Geostatistical methods were used to map the altitude of and depths to the bottoms and tops (structure) and the apparent thicknesses of the Trinidad Sandstone, the Vermejo Formation, and the Raton Formation in Las Animas County, based on completion reports and drillers' logs from about 1,400 coalbed methane wells in the Raton Basin. There was not enough subsurface control to map the structural surfaces and apparent thicknesses of the aquifers in Huerfano County. Geostatistical methods also were used to map the regional water table in the northern part of Las Animas County, based on reported depth to water from completion reports of water-supply wells. Although these maps were developed to better define the hydrostratigraphic framework, they also can be used to determine the contributing aquifer(s) of existing water wells and to estimate drilling depths of proposed water wells. These maps of the hydrostratigraphic framework could be improved with the addition of measured sections and mapping of geologic contacts at outcrops along the eastern and western margins of the Raton Basin.

Watts, Kenneth R.

2006-01-01

389

Aplicaciones pr¡cticas de la fisiolog­a de los herbicidas en las plantas  

NSDL National Science Digital Library

Esta lección se focaliza en el impacto de las características de la planta y el herbicida, importantes para determinar el desempeño del herbicida. Se usarán imágenes visuales para ilustrar varios principios, incluyendo el sitio de absorción del herbicida en la planta, transporte, el sitio de acción sensible, y efectos del ambiente sobre el desempeño del herbicida. Esta información provee la base para maximizar la utilidad del uso de los herbicidas.

390

Reavivando las Zonas Muertas de las Costas  

NSDL National Science Digital Library

The issue-focused, peer-reviewed article addresses how dead zones, or areas that cannot support life, are increasing along the coast due to: agricultural runoff and fertilizers industrial waste, and acid rain, which is produced by the burning of fossil fuels.

Robert Howarth (Cornell University;)

2000-09-01

391

2LAs, 3LAs, and the enterprise  

SciTech Connect

This article is about new things that engineers, facility managers and automation system operators need to learn about and understand when it comes to integrating information throughout an enterprise. The goal is to help one better understand the connection between building systems and building intelligence. The authors set the foundation with an overview of the latest concept in network communications, enterprise computing. Because any new technology spawns a number of acronyms, they`ll also investigate new two-, three-, four- and five-letter acronyms that directly affect the changing role of the building automation system (BAS) as it becomes an integral, contributing part of the business. In each case, one or more Internet URLs will be provided for more information.

Hoffmann, T.

1998-01-01

392

LATIN-AMERICAN CONGRESS ON ELECTRICITY GENERATION AND TRANSMISSION -CLAGTEE 2011 1 Abstract--Las fuentes de energa renovables no-convencionales  

E-print Network

THE 9th LATIN-AMERICAN CONGRESS ON ELECTRICITY GENERATION AND TRANSMISSION - CLAGTEE 2011 1 Abstract-- Las fuentes de energía renovables no-convencionales -ERNC- desempeñarán a futuro un rol central

Dixon, Juan

393

The Managua Graben and Las Sierras-Masaya volcanic complex (Nicaragua); pull-apart localization by an intrusive complex: results from analogue modeling  

Microsoft Academic Search

There is a well-documented association between pull-apart basins in strike-slip zones and large volcanic caldera complexes. Las Sierras-Masaya volcanic complex, Nicaragua, is a large basaltic lava and ignimbrite shield with nested calderas. The widest caldera is partly underlain by a large and dense intrusive complex, evidenced by a positive gravity anomaly. The Las Sierras Caldera, relating to this cumulate complex,

Guillaume Girard; Benjamin van Wyk de Vries

2005-01-01

394

Antnio Brando Moniz, Ana Vasconcelos da Silva, Tobias Woll e Jos Joo Sampaio 1 Ttulo : Procesos de globalizacin de las cadenas de valor en la industria de vestuario en Portugal  

E-print Network

las estructuras de trabajo Autor/es: António Brandão Moniz, Ana Vasconcelos da Silva, Tobias Woll e detalle implicaciones en los modelos de organización del trabajo y de las (nuevas) estructuras industria de vestuario en Portugal: implicación en las estructuras de trabajo António Brandão Moniz (IET

Paris-Sud XI, Université de

395

An evaluation of lead contamination in plastic toys collected from day care centers in the Las Vegas Valley, Nevada, USA.  

PubMed

Childhood exposure to environmental lead continues to be a major health concern. This study examined lead content within the plastic of children's toys collected from licensed day care centers in the Las Vegas valley, Nevada. It was hypothesized that the use of lead as a plastics stabilizer would result in elevated lead (?600ppm) in polyvinyl chloride plastics (PVC) compared to non-PVC plastics. It was also hypothesized that, due to the use of lead chromate as a coloring agent, yellow toys would contain higher concentrations of lead (?600ppm) than toys of other colors. Toy samples were limited to those found in day care centers in Las Vegas, Nevada. 10day care centers were visited and approximately 50 toy samples were taken from each center. Of the 535 toys tested, 29 contained lead in excess of 600 parts per million (ppm). Of those 29 toys, 20 were PVC and 17 were yellow. Both of the two hypotheses were strongly supported by the data. PMID:20721658

Greenway, Joseph A; Gerstenberger, Shawn

2010-10-01

396

An analysis of urban thermal characteristics and associated land cover in Tampa Bay and Las Vegas using Landsat satellite data  

USGS Publications Warehouse

Remote sensing data from both Landsat 5 and Landsat 7 systems were utilized to assess urban area thermal characteristics in Tampa Bay watershed of west-central Florida, and the Las Vegas valley of southern Nevada. To quantitatively determine urban land use extents and development densities, sub-pixel impervious surface areas were mapped for both areas. The urban-rural boundaries and urban development densities were defined by selecting certain imperviousness threshold values and Landsat thermal bands were used to investigate urban surface thermal patterns. Analysis results suggest that urban surface thermal characteristics and patterns can be identified through qualitatively based urban land use and development density data. Results show the urban area of the Tampa Bay watershed has a daytime heating effect (heat-source), whereas the urban surface in Las Vegas has a daytime cooling effect (heat-sink). These thermal effects strongly correlated with urban development densities where higher percent imperviousness is usually associated with higher surface temperature. Using vegetation canopy coverage information, the spatial and temporal distributions of urban impervious surface and associated thermal characteristics are demonstrated to be very useful sources in quantifying urban land use, development intensity, and urban thermal patterns. ?? 2006 Elsevier Inc. All rights reserved.

Xian, G.; Crane, M.

2006-01-01

397

Long-term assessment of the oil spill at Bahia Las Minas, Panama. Interim report. Volume 1: Executive summary  

SciTech Connect

On April 27, 1986, at least 8 million liters of medium-weight crude oil spilled from a ruptured storage tank into the Bahia Las Minas on the Caribbean Coast of Panama. Coral reefs, seagrass communities, and mangroves were affected. The area of the spill was also the location of the Smithsonian Tropical Research Institute's Galeta Laboratory where resident and visiting scientists have been studying the ecology of the Bahia Las Minas and the adjacent areas for over 15 years. Because this was a unique opportunity to assess the immediate biological effects following a major spill in the Caribbean region and to monitor the subsequent recovery, the U.S. Department of the Interior Minerals Management Service supported a 5-year environmental study. The objectives of the study are to identify any long-term changes in the marine environment that may have resulted from the spill and to understand the ecological processes causing such changes. This is the first report from the study and addresses the effects observed during the first two years of the effort.

Keller, B.D.; Jackson, J.B.C.

1991-10-01

398

Long-term assessment of the oil spill at Bahia Las Minas, Panama. Interim report. Volume 2: Technical report  

SciTech Connect

On April 27, 1986, at least 8 million liters of medium-weight crude oil spilled from a ruptured storage tank into the Bahia Las Minas on the Caribbean Coast of Panama. Coral reefs, seagrass communities, and mangroves were affected. The area of the spill was also the location of the Smithsonian Tropical Research Institute's Galeta Laboratory where resident and visiting scientists have been studying the ecology of the Bahia Las Minas and the adjacent areas for over 15 years. Because this was a unique opportunity to assess the immediate biological effects following a major spill in the Caribbean region and to monitor the subsequent recovery, the U.S. Department of the Interior Minerals Management Service supported a 5-year environmental study. The objectives of the study are to identify any long-term changes in the marine environment that may have resulted from the spill and to understand the ecological processes causing such changes. This is the first report from the study and addresses the effects observed during the first two years of the effort.

Keller, B.D.; Jackson, J.B.C.

1991-10-01

399

Morphology, body proportions, and postcranial hypertrophy of a female Neandertal from the Sima de las Palomas, southeastern Spain  

PubMed Central

Considerations of Neandertal geographical variation have been hampered by the dearth of remains from Mediterranean Europe and the absence there of sufficiently complete associated postcrania. The 2006 and 2007 excavation of an articulated partial skeleton of a small adult female Neandertal at the Sima de las Palomas, Murcia, southeastern Spain (Sima de las Palomas 96) provides substantial and secure information on body proportions among southern European Neandertals, as well as further documenting the nature of Neandertal biology in southern Iberia. The remains exhibit a suite of cranial, mandibular, dental, and postcranial features, of both Neandertals and archaic Homo generally, that distinguish them from contemporary and subsequent early modern humans. Its lower limbs exhibit the robustness of later Pleistocene Homo generally, and its upper limbs conform to the pattern of elevated robustness of the Neandertals. Its body proportions, including relative clavicular length, distal limb segment lengths, and body mass to stature indicators, conform to the cold-adapted pattern of more northern Neandertals. Palomas 96 therefore documents the presence of a suite of Neandertal characteristics in southern Iberia and, along with its small body size, the more Arctic body proportions of other European Neandertals despite the warmer climate of southern Iberia during marine isotope stage 3. PMID:21646528

Walker, Michael J.; Ortega, Jon; Parmova, Klara; Lopez, Mariano V.; Trinkaus, Erik

2011-01-01

400

Luminescent reporters and their applications for the characterization of signals and signal-mimics that alter LasR-mediated quorum sensing.  

PubMed

In many pathogenic bacteria, quorum sensing (QS) controls expression of genes that are involved in virulence, production and resistance to antibiotics, formation and maintenance of microbial multicellular consortia on biotic and abiotic surfaces of medical and industrial importance. N-acyl homoserine lactones (AHL) are the best characterized quorum sensing signals in Gram-negative bacteria. Interference with AHL-mediated QS, therefore, is considered an attractive strategy for controlling virulence in pathogens. The search for AHL signals and their mimics has been facilitated by the development of sensitive bioassays, in which QS reporters luminesce in response to AHL signals. These bioassays have already led to the identification of dozens of compounds with QS modulating activities. The characterization of the mode of action of QS signals and their mimics requires follow-up biochemical studies. Here, we describe a set of luminescent reporters, which could be used in high, medium or low throughput format, for the discovery and validation of agonists or antagonists of the Las QS system of Pseudomonas aeruginosa. These nearly isogenic reporters contain truncations or point mutations in the AHL binding domain of the AHL receptor LasR, as well as mutations in the promoter for the gene encoding LasI AHL synthase. We also developed reporters for documenting the regulation of lasI and lasR promoters. The use of these reporters significantly streamlines identification and characterization of the Las QS signal agonists and antagonists prior to biochemical experiments. To test the usefulness of these reporters, we carried out bioassays with patulin, a known inhibitor of Las QS. PMID:21031308

Alagely, Ali; Rajamani, Sathish; Teplitski, Max

2011-01-01

401

Novel inhibitors of the Pseudomonas aeruginosa virulence factor LasB: a potential therapeutic approach for the attenuation of virulence mechanisms in pseudomonal infection.  

PubMed

Pseudomonas elastase (LasB), a metalloprotease virulence factor, is known to play a pivotal role in pseudomonal infection. LasB is secreted at the site of infection, where it exerts a proteolytic action that spans from broad tissue destruction to subtle action on components of the host immune system. The former enhances invasiveness by liberating nutrients for continued growth, while the latter exerts an immunomodulatory effect, manipulating the normal immune response. In addition to the extracellular effects of secreted LasB, it also acts within the bacterial cell to trigger the intracellular pathway that initiates growth as a bacterial biofilm. The key role of LasB in pseudomonal virulence makes it a potential target for the development of an inhibitor as an antimicrobial agent. The concept of inhibition of virulence is a recently established antimicrobial strategy, and such agents have been termed "second-generation" antibiotics. This approach holds promise in that it seeks to attenuate virulence processes without bactericidal action and, hence, without selection pressure for the emergence of resistant strains. A potent inhibitor of LasB, N-mercaptoacetyl-Phe-Tyr-amide (K(i) = 41 nM) has been developed, and its ability to block these virulence processes has been assessed. It has been demonstrated that thes compound can completely block the action of LasB on protein targets that are instrumental in biofilm formation and immunomodulation. The novel LasB inhibitor has also been employed in bacterial-cell-based assays, to reduce the growth of pseudomonal biofilms, and to eradicate biofilm completely when used in combination with conventional antibiotics. PMID:21444693

Cathcart, George R A; Quinn, Derek; Greer, Brett; Harriott, Pat; Lynas, John F; Gilmore, Brendan F; Walker, Brian

2011-06-01

402

Novel Inhibitors of the Pseudomonas aeruginosa Virulence Factor LasB: a Potential Therapeutic Approach for the Attenuation of Virulence Mechanisms in Pseudomonal Infection?  

PubMed Central

Pseudomonas elastase (LasB), a metalloprotease virulence factor, is known to play a pivotal role in pseudomonal infection. LasB is secreted at the site of infection, where it exerts a proteolytic action that spans from broad tissue destruction to subtle action on components of the host immune system. The former enhances invasiveness by liberating nutrients for continued growth, while the latter exerts an immunomodulatory effect, manipulating the normal immune response. In addition to the extracellular effects of secreted LasB, it also acts within the bacterial cell to trigger the intracellular pathway that initiates growth as a bacterial biofilm. The key role of LasB in pseudomonal virulence makes it a potential target for the development of an inhibitor as an antimicrobial agent. The concept of inhibition of virulence is a recently established antimicrobial strategy, and such agents have been termed second-generation antibiotics. This approach holds promise in that it seeks to attenuate virulence processes without bactericidal action and, hence, without selection pressure for the emergence of resistant strains. A potent inhibitor of LasB, N-mercaptoacetyl-Phe-Tyr-amide (Ki = 41 nM) has been developed, and its ability to block these virulence processes has been assessed. It has been demonstrated that thes compound can completely block the action of LasB on protein targets that are instrumental in biofilm formation and immunomodulation. The novel LasB inhibitor has also been employed in bacterial-cell-based assays, to reduce the growth of pseudomonal biofilms, and to eradicate biofilm completely when used in combination with conventional antibiotics. PMID:21444693

Cathcart, George R. A.; Quinn, Derek; Greer, Brett; Harriott, Pat; Lynas, John F.; Gilmore, Brendan F.; Walker, Brian

2011-01-01

403

Changes in air quality at near-roadway schools after a major freeway expansion in Las Vegas, Nevada.  

PubMed

Near-roadway ambient black carbon (BC) and carbon monoxide (CO) concentrations were measured at two schools adjacent to a freeway and at an urban background school 2 km from the freeway to determine the change in concentrations attributable to vehicle emissions after the three-lane expansion of U.S. Highway 95 (US 95) in Las Vegas, Nevada. Between summer 2007 and summer 2008, average weekday small-vehicle volume increased by 40% +/- 2% (standard error). Average weekday large-vehicle volume decreased by 17% +/- 5%, due to a downturn in the economy and an associated decline in goods movement. Average vehicle speed increased from 58 to 69 mph, a 16% +/- 1% increase. The authors compared BC and CO concentrations in summer 2007 with those in summer 2008 to understand what effect the expansion of the freeway may have had on ambient concentrations: BC and CO were measured 17 m north of the freeway sound wall, CO was measured 20 m south of the sound wall, and BC was measured at an urban background site 2 km south of the freeway. Between summer 2007 and summer 2008, median BC decreased at the near-road site by 40% +/- 2% and also decreased at the urban background site by 24% +/- 4%, suggesting that much of the change was due to decreases in emissions throughout Las Vegas, rather than only on US 95. CO concentrations decreased by 14% +/- 2% and 10% +/- 3% at the two near-road sites. The decrease in BC concentrations after the expansion is likely due to the decrease in medium- and heavy-duty-vehicle traffic resulting from the economic recession. The decrease in CO concentrations may be a result of improved traffic flow, despite the increase in light-duty-vehicle traffic. Implications: Monitoring of BC and CO at near-road locations in Las Vegas demonstrated the impacts of changes in traffic volume and vehicle speed on near-road concentrations. However, urban-scale declines in concentrations were larger than near-road changes due to the impacts of the economic recession that occurred contemporaneously with the freeway expansion. PMID:25282997

Brown, Steven G; McCarthy, Michael C; DeWinter, Jennifer L; Vaughn, David L; Roberts, Paul T

2014-09-01

404

A preliminary assessment of earthquake ground shaking hazard at Yucca Mountain, Nevada and implications to the Las Vegas region  

SciTech Connect

As part of early design studies for the potential Yucca Mountain nuclear waste repository, the authors have performed a preliminary probabilistic seismic hazard analysis of ground shaking. A total of 88 Quaternary faults within 100 km of the site were considered in the hazard analysis. They were characterized in terms of their probability o being seismogenic, and their geometry, maximum earthquake magnitude, recurrence model, and slip rate. Individual faults were characterized by maximum earthquakes that ranged from moment magnitude (M{sub w}) 5.1 to 7.6. Fault slip rates ranged from a very low 0.00001 mm/yr to as much as 4 mm/yr. An areal source zone representing background earthquakes up to M{sub w} 6 1/4 = 1/4 was also included in the analysis. Recurrence for these background events was based on the 1904--1994 historical record, which contains events up to M{sub w} 5.6. Based on this analysis, the peak horizontal rock accelerations are 0.16, 0.21, 0.28, and 0.50 g for return periods of 500, 1,000, 2,000, and 10,000 years, respectively. In general, the dominant contributor to the ground shaking hazard at Yucca Mountain are background earthquakes because of the low slip rates of the Basin and Range faults. A significant effect on the probabilistic ground motions is due to the inclusion of a new attenuation relation developed specifically for earthquakes in extensional tectonic regimes. This relation gives significantly lower peak accelerations than five other predominantly California-based relations used in the analysis, possibly due to the lower stress drops of extensional earthquakes compared to California events. Because Las Vegas is located within the same tectonic regime as Yucca Mountain, the seismic sources and path and site factors affecting the seismic hazard at Yucca Mountain also have implications to Las Vegas. These implications are discussed in this paper.

Wong, I.G.; Green, R.K.; Sun, J.I. [Woodward-Clyde Federal Services, Oakland, CA (United States); Pezzopane, S.K. [Geological Survey, Denver, CO (United States); Abrahamson, N.A. [Abrahamson (Norm A.), Piedmont, CA (United States); Quittmeyer, R.C. [Woodward-Clyde Federal Services, Las Vegas, NV (United States)

1996-12-31

405

Sources and concentrations of mercury and selenium in compartments within the Las Vegas Wash during a period of rapid change.  

PubMed

The Las Vegas Wash, which drains the Las Vegas valley watershed and provides the second largest inflow to Lake Mead, is being dramatically altered with erosion control structures and wetland restoration efforts. The impact of these changes on the cycling and distribution of Hg and Se is of particular interest because of their tendency to bioaccumulate and because of a lack of information on these contaminants in the Wash. In this study, we determined concentrations of Hg and Se in surface water (monthly), groundwater (once) and sediments (quarterly) from strategic locations within and along the Wash during 2002 and 2003. The data was used to characterize Se sources and loading into the Wash. Samples containing resurfacing groundwater and urban runoff (LW10.75 and Duck Creek) had significantly higher yearly means (13.7 +/- 4.4 and 23.8 +/- 4.1 microg/L, respectively) compared with mainstream samples containing primarily treated wastewater (2.8 +/- 0.8 microg/L). Investigation of Se in tributaries, street runoff and rain suggest that the source of the elevated Se is likely groundwater seeps located within a relatively narrow geographic band on the southeast side of the valley. Se content of sediments was similar, except for LW10.75 which was rich in organic matter. Hg concentrations in the water and sediments were low, averaging 4 +/- 5 ng/L and 34 +/- 20 ng/g, dw, respectively. Overall, this study suggests that water quality remains relatively stable despite changes in the Wash and managers of developing wetlands should not use tributary water as source water. PMID:16418906

Cizdziel, James; Zhou, Xiaoping

2005-08-01

406

Systems dynamic model to forecast salinity load to the Colorado River due to urbanization within the Las Vegas Valley.  

PubMed

This study evaluates the impact of urban growth in the Las Vegas Valley (LVV), Nevada, USA on salinity of the Colorado River. In the past thirty eight years the LVV population has grown from 273,288 (1970) to 1,986,146 (2008). The wastewater effluents and runoff from the valley are diverted back to the Colorado River through the Las Vegas Wash (LVW). With the growth of the valley, the salinity released from urban areas has increased the level of TDS in the wastewater effluents, ultimately increasing the TDS in the Colorado River. The increased usage of water softeners in residential and commercial locations is a major contributor of TDS in the wastewater effluents. Controlling TDS release to the Colorado River is important because of the 1944 Treaty signed between the USA and Mexico. In addition, the agriculture salinity damage cost for the Colorado River has been estimated to be more than $306 a million per year using 2004 salinity levels. With the expected growth of LVV in coming years the TDS release into Lake Mead will increase over time. For this purpose, it is important to investigate future TDS release into the Colorado in anticipation of potential TDS reducing measures to be adopted. In this research, a dynamic simulation model was developed using system dynamics modeling to carry out water and TDS mass balances over the entire LVV. The dynamic model output agreed with historic data with an average error of 2%. Forecasts revealed that conservation efforts can reduce TDS load by 16% in the year 2035 when compared to the current trend. If total population using water softeners can be limited to 10% in the year 2035, from the current 30% usage, TDS load in the LVW can be reduced by 7%. PMID:21514626

Venkatesan, Arjun K; Ahmad, Sajjad; Johnson, Walter; Batista, Jacimaria R

2011-06-01

407

Simulation of unsaturated flow and solute transport at the Las Cruces trench site using the PORFLO-3 computer code  

SciTech Connect

The objective of this work was to test the ability of the PORFLO-3 computer code to simulate water infiltration and solute transport in dry soils. Data from a field-scale unsaturated zone flow and transport experiment, conducted near Las Cruces, New Mexico, were used for model validation. A spatial moment analysis was used to provide a quantitative basis for comparing the mean simulated and observed flow behavior. The scope of this work was limited to two-dimensional simulations of the second experiment at the Las Cruces trench site. Three simulation cases are presented. The first case represents a uniform soil profile, with homogeneous, isotropic hydraulic and transport properties. The second and third cases represent single stochastic realizations of randomly heterogeneous hydraulic conductivity fields, generated from the cumulative probability distribution of the measured data. Two-dimensional simulations produced water content changes that matched the observed data reasonably well. Models that explicitly incorporated heterogeneous hydraulic conductivity fields reproduced the characteristics of the observed data somewhat better than a uniform, homogeneous model. Improved predictions of water content changes at specific spatial locations were obtained by adjusting the soil hydraulic properties. The results of this study should only be considered a qualitative validation of the PORFLO-3 code. However, the results of this study demonstrate the importance of site-specific data for model calibration. Applications of the code for waste management and remediation activities will require site-specific data for model calibration before defensible predictions of unsaturated flow and containment transport can be made. 23 refs., 16 figs., 3 tabs.

Rockhold, M.L.; Wurstner, S.K.

1991-03-01

408

Spatial Statistics of the Clark County Parcel Map, Trial Geotechnical Models, and Effects on Ground Motions in Las Vegas Valley  

NASA Astrophysics Data System (ADS)

When deterministically modeling the propagation of seismic waves, shallow shear-wave velocity plays a crucial role in predicting shaking effects such as peak ground velocity (PGV). The Clark County Parcel Map provides us with a data set of geotechnical velocities in Las Vegas Valley, at an unprecedented level of detail. Las Vegas Valley is a basin with similar geologic properties to some areas of Southern California. We analyze elementary spatial statistical properties of the Parcel Map, along with calculating its spatial variability. We then investigate these spatial statistics from the PGV results computed from two geotechnical models that incorporate the Parcel Map as parameters. Plotting a histogram of the Parcel Map 30-meter depth-averaged shear velocity (Vs30) values shows the data to approximately fit a bimodal normal distribution with ?1 = 400 m/s, ?1 = 76 m/s, ?2 = 790 m/s, ?2 = 149 m/s, and p = 0.49., where ? is the mean, ? is standard deviation, and p is the probability mixing factor for the bimodal distribution. Based on plots of spatial power spectra, the Parcel Map appears to be fractal over the second and third decades, in kilometers. The spatial spectra possess the same fractal dimension in the N-S and the E-W directions, indicating isotropic scale invariance. We configured finite-difference wave propagation models at 0.5 Hz with LLNL's E3D code, utilizing the Parcel Map as input parameters to compute a PGV data set from a scenario earthquake (Black Hills M6.5). The resulting PGV is fractal over the same spatial frequencies as the Vs30 data sets associated with their respective models. The fractal dimension is systematically lower in all of the PGV maps as opposed to the Vs30 maps, showing that the PGV maps are richer in higher spatial frequencies. This is potentially caused by a lens focusing effects on seismic waves due to spatial heterogeneity in site conditions.

Savran, W. H.; Louie, J. N.; Pullammanappallil, S.; Pancha, A.

2011-12-01

409

Mecanismo(s) de Acci³n de las Auxinas y los Herbicidas Aux­nicos - Parte 1- Introducci³n  

NSDL National Science Digital Library

Descripci³n:El control selectivo de malezas de hoja ancha en cultivos de cereales utilizando herbicidas aux­nicos ha hecho de ©stos una de las familias de herbicidas actualmente en uso m¡s ampliamente distribuidas e importantes. Estos herbicidas fueron los primeros herbicidas org¡nicos desarrollados que presentaron selectividad; es decir, capaces de matar un cierto grupo de plantas sin afectar a otros grupos (por ejemplo: matar plantas de hoja ancha pero no las de hoja angosta; en este documento se utilizar¡ el t©rmino "gram­neas" para referirse a las plantas de hoja angosta o cereales). En esta lecci³n se presentar¡n las principales caracter­sticas de los herbicidas aux­nicos, se discutir¡n sus principales usos y se describir¡n los s­ntomas de da±o que causan. De igual forma, se indicar¡ la forma en que estos herbicidas matan a las plantas sensibles.

410

Log ASCII Standard (LAS) Files for Geophysical (Gamma Ray) Wireline Well Logs and Their Application to Geologic Cross Section C-C' Through the Central Appalachian Basin  

USGS Publications Warehouse

U.S. Geological Survey (USGS) regional geologic cross section C-C' (Ryder and others, 2008) displays key stratigraphic intervals in the central Appalachian basin. For this cross section, strata were correlated by using descriptions of well cuttings and gamma ray well log traces. This report summarizes the procedures used to convert gamma ray curves on paper well logs to the digital Log ASCII (American Standard Code for Information Interchange) Standard (LAS) format using the third-party software application Neuralog. The procedures could be used with other geophysical wireline logs also. The creation of digital LAS files from paper well logs by using Neuralog is very helpful, especially when dealing with older logs with limited or nonexistent digital data. The LAS files from the gamma ray logs of 11 wells used to construct cross section C-C' are included in this report. They may be downloaded from the index page as a single ZIP file.

Trippi, Michael H.; Crangle, Robert D., Jr.

2009-01-01

411

Reproductive responses of common carp (Cyprinus carpio) exposed in cages to influent of the Las Vegas Wash in Lake Mead, Nevada, from late winter to early spring.  

PubMed

The Las Vegas Wash (LW) delivers tertiary-treated municipal wastewater effluent, nonpotable shallow groundwater seepage, and runoff from the urbanized Las Vegas Valley to Las Vegas Bay (LX) of Lake Mead. To investigate the potential for contaminants in LW influent to produce effects indicative of endocrine disruption in vivo, adult male and female common carp (Cyprinus carpio) were exposed in cages for 42-48 d at four sites in Lake Mead: LW, LX, and two reference locations in the lake. End points examined included gonadosomatic index; gonad histology; concentrations of plasma vitellogenin (VTG) and plasma sex steroids (17beta-estradiol (E2), testosterone (T), 11-ketotestosterone (11-KT)); plasma estrogen:androgen ratios (E2:T, E2:11-KT), in vitro production of T by gonad tissue, and hepatopancreas ethoxyresorufin O-deethylase activity. Few differences among fish caged at different sites were potentially attributable to exposure to contaminants PMID:15597896

Snyder, Erin M; Snyder, Shane A; Kelly, Kevin L; Gross, Timothy S; Villeneuve, Daniel L; Fitzgerald, Scott D; Villalobos, Sergio A; Giesy, John P

2004-12-01

412

RESPUESTA TEMPORAL A H2 DE CAPACITORES MOS CON COMPUERTA DE Mo TEMPORAL RESPONSE TO H2 IN Mo GATE MOS CAPACITORS  

Microsoft Academic Search

. La fotocorriente inducida por iluminacin pulsada, de un capacitor MOS con compuerta de Mo, provisto de ventana ptica, se emplea como monitor de su estado de carga, frente a estmulos qumicos con concentraciones crecientes de H2 en N2 de hasta 1000 ppm. Se describen las respuestas inducidas por transporte a la interfaz metal-dielctrico. Los resultados confirman que la sensibilidad

R. M. Lombardi; R. Aragn

413

Se encuentra el primer medicamento para la prevencin del cncer de prstata, aunque no todos los hombres se benefician: El NCI anuncia los resultados del Estudio de Prevencin del Cncer de Prstata (PCPT)  

Cancer.gov

Los hombres que tomaron finasterida, un medicamento que afecta las concentraciones de hormona masculina, redujeron en cerca de un veinticinco por ciento su probabilidad de tener cncer de prstata, comparados con quienes tomaron placebo, segn los resultados de un estudio nacional divulgado hoy en lnea por el New England Journal of Medicine.

414

Characterization of the Sediment Routing System of the Argentine Las Peas Thrust From ASTER Imagery Interpretation and DEM Terrain Analysis  

NASA Astrophysics Data System (ADS)

In an arid region north of Mendoza, Argentina active structures of the Precordilleran fold and thrust belt control sedimentation in the proximal Andean foreland basin. Initiation of new thrust faults and along-strike growth of fault-propagation folds drives uplift of hanging-wall source areas. Drainage basin initiation and development in the Las Peas thrust hanging-wall triggers erosion of sediment, controlling transport and depositional mechanisms in the associated alluvial fan system. Alluvial fans are classified as either sheetflood or debris-flow fans based on the areally dominant process responsible for producing the sediment wedge as recorded in the surface character and morphology of the fans. Traditionally, information about these systems has been directly measured using manual methods such as ground surveying and visible image interpretation. This study implements remote sensing with ASTER spectral data and derived topographic data to characterize both fan surfaces and drainage basins. AST14DMO data include fourteen ASTER Level-1B calibrated nadir looking radiance bands at 15-m (VNIR), 30-m (SWIR) and 90-m (TIR) resolution. AST14DMO also includes the ASTER 30-m Digital Elevation Model (DEM) derived from stereoscopic data from the VNIR sensor. These bands were used in rule-based classification implemented in statistical software. The classification was used for mapping and measuring the patterns and spectral characteristics of fan surfaces. TIR and VNIR explanatory variables in decision trees highlighted differences in fan environmental variables including soil conditions, sediment size, and vegetation (moisture, roughness, and composition) indicative of process and rate of deposition on alluvial fans. Terrain Analysis conducted with the ASTER 30-m DEM focused on morphology of the drainage basin sector of the sediment routing system. Drainage basin characteristics including areal extent, slope, aspect, hypsometric curves, and bedrock geology were identified and compared. The information was used to interpret transport and depositional mechanisms within the system, as well as identify source materials and possible ranges of fluid-sediment concentrations for each basin. The geometry of the developing Las Peas thrust controls attributes of both drainage basin source areas, and alluvial fan depositional environments as shown by their variation along the fault. The techniques and setting of this study inform interpretations of processes active in modern systems that are applicable to ancient systems on Earth and elsewhere.

Abrahamson, I. S.; Schmitt, J.

2009-12-01

415

El Informe Anual a la Nacin indica que las tasas de mortalidad por cncer continan declinando: los avances en el tratamiento del cncer varan segn el tipo de cncer  

Cancer.gov

Las organizaciones oncolgicas principales de la nacin informan que el riesgo de los estadounidenses de morir de cncer sigue disminuyendo y que las tasas de casos nuevos de cncer permanecen estables. El Informe Anual a la Nacin sobre el Estado del Cncer, de 1975 a 2002, seala que las tasas de mortalidad de cncer que se observaron para todos los cnceres combinados disminuyeron 1,1 por ciento por ao de 1993 a 2002.

416

The Las Vegas Thesis  

ERIC Educational Resources Information Center

Following "reflexive ethnography" and utilizing an approach of "performative narrative" and "layered text", this article explores how Bachelor of Arts students in the Teaching of English as a Foreign Language program at a public university in Mexico successfully manage the writing of an inductive-oriented thesis in English by resisting

Sughrua, William

2010-01-01

417

Fichas de las especies  

Microsoft Academic Search

Sittasomus griseicapillus, Xiphorhynchus flavigaster, Myiopagis viridicata, Mitrephanes phaeocercus, \\u000aEmpidonax difficilis \\/ occidentalis, Myiarchus tuberculifer, Myiarchus cinerascens, Myiarchus nuttingi, Myiarchus tyrannulus, Pitangus sulphuratus, Myiozetetes similis, Myiodynastes luteiventris, Pachyramphus aglaiae, Vireo brevipennis, Vireo bellii, Vireo nelsoni, Vireo hypochryseus, \\u000aVireo gilvus, Vireo flavoviridis, Thryothorus sinaloa, Thryothorus felix, Troglodytes brunneicollis, Troglodytes aedon, Henicorhina leucophrys, Polioptila caerulea, Myadestes occidentalis, Catharus aurantiirostris, Catharus occidentalis, Catharus frantzii,

Santi Guallar; E. Santana; S. Contreras; H. Verdugo; A. Galls

2009-01-01

418

Computational discovery of putative quorum sensing inhibitors against LasR and RhlR receptor proteins of Pseudomonas aeruginosa.  

PubMed

Drugs have been discovered in the past mainly either by identification of active components from traditional remedies or by unpredicted discovery. A key motivation for the study of structure based virtual screening is the exploitation of such information to design targeted drugs. In this study, structure based virtual screening was used in search for putative quorum sensing inhibitors (QSI) of Pseudomonas aeruginosa. The virtual screening programme Glide version 5.5 was applied to screen 1,920 natural compounds/drugs against LasR and RhlR receptor proteins of P. aeruginosa. Based on the results of in silico docking analysis, five top ranking compounds namely rosmarinic acid, naringin, chlorogenic acid, morin and mangiferin were subjected to in vitro bioassays against laboratory strain PAO1 and two more antibiotic resistant clinical isolates, P. aeruginosa AS1 (GU447237) and P. aeruginosa AS2 (GU447238). Among the five compounds studied, except mangiferin other four compounds showed significant inhibition in the production of protease, elastase and hemolysin. Further, all the five compounds potentially inhibited the biofilm related behaviours. This interaction study provided promising ligands to inhibit the quorum sensing (QS) mediated virulence factors production in P. aeruginosa. PMID:22986632

Annapoorani, Angusamy; Umamageswaran, Venugopal; Parameswari, Radhakrishnan; Pandian, Shunmugiah Karutha; Ravi, Arumugam Veera

2012-09-01

419

Nuevos escenarios de la migraci?n M?xico-Estados Unidos. Las consecuencias de la guerra antiinmigrante  

PubMed Central

La historia de la migracin Mxico-Estados Unidos se caracteriza por una serie de periodos durante los cuales los patrones migratorios se transforman y evolucionan como respuesta a los cambios en la poltica migratoria de Estados Unidos. En la dcada de 1990 se dio uno de estos cambios, lo que provoc el paso de la era de la contradiccin a la era de la marginalizacin. Actualmente, un gran nmero de migrantes indocumentados permanecen al margen de la ley, precisamente en un periodo en el que las penas se han incrementado y la persecucin ha alcanzado niveles rcord. De manera cada vez ms notoria, los migrantes indocumentados, por la represin interna y fronteriza, quedan obligados a romper los lazos que los vinculaban con sus lugares de destino, pero al mismo tiempo se sienten cada vez ms extraos en una tierra donde la aplicacin de polticas antiinmigrantes es cosa de todos los das, lo que los sita en una posicin de marginalizacin y gran vulnerabilidad. PMID:21209790

MASSEY, Douglas S.; PREN, Karen A.; DURAND, Jorge

2010-01-01

420

El Aula de la Ciencia de la UA celebra el Da Mundial del Medio Ambiente con una visita a las Salinas de Santa Pola  

E-print Network

Salinas de Santa Pola Alicante, 6 de junio de 2014 El Aula de la Ciencia de la Universidad de Alicante viaja este sábado al Parque Natural de las Salinas de Santa Pola para celebrar el Día Mundial del Medio

Escolano, Francisco

421

PROCEEDINGS OF CONFERENCE ON ENVIRONMENTAL QUALITY SENSORS (2ND) HELD AT NATIONAL ENVIRONMENTAL RESEARCH CENTER, LAS VEGAS, NEVADA ON OCTOBER 10-11, 1973  

EPA Science Inventory

This report contains the papers presented at the Second Conference on Environmental Quality Sensors, held at the U.S. Environmental Protection Agency's National Environmental Research Center, Las Vegas, Nevada, on October 10 and 11, 1973. The papers covered such topics as: aircra...

422

IR Characterization of BiPropellant Reaction Control Engines During Auxiliary Propulsion Systems Tests at NASA's White Sands Test Facility In Las Cruces, New Mexico  

Microsoft Academic Search

This paper describes the application of a FLIR Systems A40M infrared (IR) digital camera for thermal monitoring of a Liquid Oxygen (LOX) and Ethanol bi-propellant Reaction Control Engine (RCE) during Auxiliary Propulsion System (APS) testing at the National Aeronautics & Space Administration's (NASA) White Sands Test Facility (WSTF) near Las Cruces, New Mexico. Typically, NASA has relied mostly on the

Elizabeth Holleman

423

Shallow ground water in the Whitney Area, southeastern Las Vegas Valley, Clark County, Nevada - Part 1. Description of chemical quality, 1986-87  

Microsoft Academic Search

A prototype groundwater detention basin was proposed by the US Bureau of Reclamation to reduce the quantity of dissolved solids entering Las Vegas Wash, Nevada from groundwater seepage, as part of an overall plan to reduce salinity in the lower Colorado River. This report describes groundwater quality in the area of the proposed basin and processes that may control the

D. H. Emme; D. E. Prudic

1991-01-01

424

Mutational Analysis of the Quorum-Sensing Receptor LasR Reveals Interactions that Govern Activation and Inhibition by Nonlactone Ligands.  

PubMed

Gram-negative bacteria use N-acyl L-homoserine lactone (AHL) quorum-sensing (QS) signals to regulate the expression of myriad phenotypes. Non-native AHL analogs can strongly attenuate QS receptor activity and thereby QS signaling; however, we currently lack a molecular understanding of the mechanisms by which most of these compounds elicit their agonistic or antagonistic profiles. In this study, we investigated the origins of striking activity profile switches (i.e., receptor activator to inhibitor, and vice versa) observed upon alteration of the lactone head group in certain AHL analogs. Reporter gene assays of mutant versions of the Pseudomonas aeruginosa QS receptor LasR revealed that interactions between the ligands and Trp60, Tyr56, and Ser129 govern whether these ligands behave as LasR activators or inhibitors. Using this knowledge, we propose a model for the modulation of LasR by AHL analogs-encompassing a subtly different interaction with the binding pocket to a global change in LasR conformation. PMID:25242287

Gerdt, Joseph P; McInnis, Christine E; Schell, Trevor L; Rossi, Francis M; Blackwell, Helen E

2014-10-23

425

Source: http://drive.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu Upload Files and Folders into Google Drive  

E-print Network

Source: http://drive.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu Upload Files and Folders into Google Drive You can upload and convert existing Microsoft PowerPoint presentations into Google Drive for online editing and sharing. Presentations convert

Walker, Lawrence R.

426

Source: http://mail.google.com/mail/help/chat.html University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu Chat Interface  

E-print Network

Source: http://mail.google.com/mail/help/chat.html University of Nevada, Las Vegas Office, AIM, or an open service that is part of the Google Talk network, they will be able to chat with you-in chat. Chat from your desktop: PC users can download the Google Talk Client at http://www.google

Walker, Lawrence R.

427

Source: http://drive.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu Upload Files and Folders into Google Drive  

E-print Network

Source: http://drive.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu Upload Files and Folders into Google Drive You can upload and convert existing Microsoft Excel spreadsheets, Comma-Separated-Value files (.csv), or plain text files (.txt) into Google

Walker, Lawrence R.

428

Source: http://groups.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu What can I do with Groups?  

E-print Network

Source: http://groups.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu What can I do with Groups? Google Groups makes it easy to communicate own online discussion forum and where members can share information. Using Google Groups, you can

Walker, Lawrence R.

429

Source: http://drive.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu http://rebelmail.unlv.edu/drive  

E-print Network

Source: http://drive.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu http://rebelmail.unlv.edu/drive http://drive.google.com/a/unlv.nevada.edu Google Docs Quick Reference Guide Create New Documents 1. From your Drive homepage, click Create new

Walker, Lawrence R.

430

Source: http://drive.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu Upload Files and Folders into Google Drive  

E-print Network

Source: http://drive.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu Upload Files and Folders into Google Drive You can upload and convert the following file types into Google Drive for online editing and sharing. Documents: Microsoft Word, Open

Walker, Lawrence R.

431

Source: http://sites.google.com/support/ University of Nevada, Las Vegas Office of Information Technology http://oit.unlv.edu Change Your Site's Theme, Colors, and Fonts.  

E-print Network

Source: http://sites.google.com/support/ University of Nevada, Las Vegas Office of Information.0+ Firefox 3.6 + Google Chrome http://rebelmail.unlv.edu/site http://sites.google.com/a/unlv.nevada.edu Google Sites Quick Reference Guide Create a Site 1. From your Google Sites homepage, click on the Create

Walker, Lawrence R.

432

The Birth of a New Vocational-Technical Center. National Vocational-Technical Facility Planning Conference (Las Vegas, Nevada, May, 1967).  

ERIC Educational Resources Information Center

The principal of the Southern Nevada Vocational-Technical Center at Las Vegas, Nevada, briefly outlines its development and function. The facility cost approximately 3 million dollars and was built on 390 acres of land purchased from the Federal government. The PERT method was used in planning. Instructional facilities, including those for auto

Farnsworth, Clayton

433

William F. Harrah College of Hotel Administration PGA Golf Management 4505 S. Maryland Parkway | Box 453035 | Las Vegas| NV 89154-3035  

E-print Network

William F. Harrah College of Hotel Administration ­ PGA Golf Management 4505 S. Maryland Parkway | Box 453035 | Las Vegas| NV 89154-3035 (702) 895-3865 | Fax (702) 774-8994 hotel.unlv.edu/pga. This scholarship supports students who are studying PGA Golf Management at UNLV and who, like Matthew

Ahmad, Sajjad

434

Instituciones al Servicio de los Hispanos estn a la vanguardia de la investigacin de las desigualdades en salud por cncer en la comunidad latina  

Cancer.gov

Varias Instituciones al Servicio de los Hispanos forman parte de un grupo de escuelas profesionales y universidades que se han asociado con el Instituto Nacional del Cncer (NCI) y cierto nmero de centros oncolgicos regionales para abordar el tema de las desigualdades en salud por cncer que afectan a la comunidad latina.

435

fLasHThe Free-Electron Laser new technologies for new science: Soon X-ray free-electron lasers  

E-print Network

fLasHªThe Free-Electron Laser in Hamburg new technologies for new science: Soon X-ray free-electron to you a new research facility of unprecedented features ­ FLASH, the Free-Electron Laser in Hamburg. Time to explore the femtosecond dynamics of nature Soon X-ray free-electron lasers will enable us

436

Estructura de tallas y crecimiento de los cangrejos Callinectes arcuatus y C. bellicosus (Decapoda: Portunidae) en la laguna costera Las Gusimas, Mxico  

Microsoft Academic Search

Size frequency distribution and growth of the crabs Callinectes arcuatus and C. bellicosus (Decapoda: Portunidae) in Las Gusimas coastal lagoon, Mexico. Information on size frequency distribution, the width-weight relation and growth parameters of the crabs Callinectes arcuatus and C. bellicosus is presented. The data comes from samples taken with a trawl net both day and night on a monthly basis

Luis Hernndez; Jos Alfredo Arreola-Lizrraga

2007-01-01

437

Reproductive Responses of Common Carp Cyprinus carpio in Cages to Influent of the Las Vegas Wash in Lake Mead, Nevada, from late Winter to early Spring  

EPA Science Inventory

To investigate the potential for contaminants in Las Vegas Wash (LW) influent to produce effects indicative of endocrine disruption in vivo, adult male and female common carp were exposed in cages for 42-48 d at four sites and two reference locations in Lake Mead....

438

USO RACIONAL DEL AGUA EN ESTABLECIMIENTOS HOTELEROS, SEGN LAS BUENAS PRCTICAS AMBIENTALES. ESTUDIO DE CASO: CIUDAD CAPITAL DE LA RIOJA - ARGENTINA  

Microsoft Academic Search

En la actualidad el turismo como fenmeno masivo puede ayudar a conservar los frgiles ecosistemas, as como a contribuir al desarrollo del turismo sostenible de las comunidades locales, pero en ocasiones la actividad turstica puede impactar negativamente en el ambiente, causando numerosos problemas asociados con los impactos de la actividad turstica y recreativa sobre el recurso hdrico como la contaminacin

Miriam Marcela Azcurra; Ana Elizabeth de la Puente

2012-01-01

439

Paleonutritional and paleodietary survey on prehistoric humans from Las Caadas del Teide (Tenerife, Canary Islands) based on chemical and histological analysis of bone  

Microsoft Academic Search

The aim of the present study is to perform a paleodietary and paleonutritional survey on 17 individuals buried in accordance with the prehispanic ritual in the central plateau of the island Tenerife, called Las Caadas del Teide. We recorded hydrogen, nitrogen and carbon isotope compositions of human bone collagen, bone barium and strontium, and histomorphometrically assessed trabecular bone mass (TBM).

M. Arnay-de-la-Rosa; E. Gonzlez-Reimers; Y. Yanes; C. S. Romanek; J. E. Noakes; L. Galindo-Martn

2011-01-01

440

La economa poltica de las reformas institucionales en Argentina: Los casos de la poltica de privatizacin de Entel, la reforma de la seguridad social y la reforma laboral  

Microsoft Academic Search

Quizs los observadores de Argentina no se hayan recuperado totalmente de la impresin producida por la magnitud de los cambios producidos en sus instituciones econmicas en los aos noventa bajo la presidencia de Carlos Menem. Comenzando en 1989, el pas se embarc en una nueva estrategia de desarrollo centrada en la inversin privada, la apertura externa y las seales de

Juan Carlos Torre; Pablo Gerchunoff

1999-01-01

441

Estimating the economic impacts of a hub airline serving a tourist destination: the case of america west airlines and las vegas, nevada  

Microsoft Academic Search

Airlines are an important component of regional economies. The economic impact of an airline goes beyond the usual impacts of their payroll and expenditures. Airlines also may affect business productivity and the critical economic base of a regional economy. This article estimates the economic impact of America West Airlines on Las Vegas, Nevada. Key aspects of the study were measurement

John H. Brown; Thomas M. Carroll; Dan S. Rickman; R. Keith Schwer

1995-01-01

442

Summary of chemical data from onsite and laboratory analyses of groundwater samples from the surficial aquifer, Las Vegas, Nevada, April and August 1993 and September 1994  

USGS Publications Warehouse

Samples were collected from groundwater wells in and about the city of Las Vegas, Nevada, and were analyzed for selected major, minor and trace constituents. Analyses of blank and reference samples are summarized as mean and standard deviation values for all positive results.

Reddy, Michael M.; Gunther, Charmaine D.

2012-01-01

443

Cdigos UNESCO: 2100 2200 2300 Frecuencia del curso: Anual X CURSO DE INICIACIN A LA INVESTIGACIN EN ESTRUCTURA DE LA MATERIA: DESDE LAS PARTCULAS  

E-print Network

EN ESTRUCTURA DE LA MATERIA: DESDE LAS PARTÍCULAS ELEMENTALES A LOS SISTEMAS DE ALTO PESO MOLECULAR investigación que se desarrollan actualmente en el Instituto de Estructura de la Materia a estudiantes de los Física de la Materia Desordenada. Fenómenos Sorprendentes en Núcleos Exóticos. Reacciones y Estructura

444

Exploring the effects of population growth on future land use change in the Las Vegas Wash watershed: an integrated approach of geospatial modeling and analytics  

EPA Science Inventory

The Las Vegas Valley metropolitan area is one of the fastest growing areas in the southwestern United States. The rapid urbanization has led to many environmental problems. For instance, as population growth and urbanization continue, there will be a problem with water shortage. ...

445

Site Name : Las Cabras permanent stationAuthor : Sylvain, Marianne, Max Site Code :C A B R date : year 2010 month 03 day 11  

E-print Network

the antenna and solar panels from the horses. . CABR 2/4 #12;CABR 1-2-3 : installation. 4- vue from made at DGF, height 41 mm. ACCESS Take the road to San Vicente de Tagua and Peumo from the 5. Follow the road until entering in Las Cabras. Turn right from the main road to enter the village and go

Vigny, Christophe

446

Uso de las mquinas de pivote central en el riego con aguas residuales Use of the center pivot machine in the irrigation with wastewaters  

Microsoft Academic Search

RESUMEN. Es una realidad mundial, actual, que el agua potable es cada da ms escasa para todos los usos en las actividades diarias de la poblacin. La agricultura es el mayor consumidor de agua, con marcado incremento en los pases en vas de desarrollo donde a su vez se requiere de una mayor produccin de alimentos. En reas urbanas y

Candelario Alemn G

2006-01-01

447

Captura y Reconfiguracin Cooptada del Estado en Guatemala, Mxico y Colombia Anlisis conceptual de las memorias de la Primera Discusin Internacional Sobre Captura y Reconfiguracin Cooptada del Estado  

Microsoft Academic Search

La evidencia muestra que el narcotrfico es importante en el fortalecimiento de la corrupcin de Guatemala, Mxico y Colombia; por lo tanto, es problemtico analizar de modo separado ambos fenmenos. Los hechos muestran tambin que las organizaciones narcotraficantes de los tres pases han aprendido a regular la coercin del Estado. Este aprendizaje ha representado un salto que va desde la

Luis Jorge Garay-Salamanca; Isaac de Len-Beltrn; Eduardo Salcedo-Albarn

2010-01-01

448

BEA Annual Convention: A Look Back at BEA 97 and Preparing for BEA 98, April 3-6, Las Vegas, Nevada.  

ERIC Educational Resources Information Center

The 42nd annual Broadcast Education Association (BEA) Convention ("Reinventing Electronic Media: Multimedia in the New Millennium") for electronic media educators was held April 3-6, 1997 in Las Vegas, Nevada. This article outlines events at the 1997 convention and provides a "sneak peek" at planning for the 1998 convention, "Electronic Media:

Feedback, 1997

1997-01-01

449

Conference on Artificial Intelligence | ICAI'06 | WORLDCOMP 2006 International Conference on Artificial Intelligence, Las Vegas, NV, June 26-29, 2006  

E-print Network

Conference on Artificial Intelligence | ICAI'06 | WORLDCOMP 2006 ­ International Conference on Artificial Intelligence, Las Vegas, NV, June 26-29, 2006 76 ICAI'06 An agent-based simulation of the L disturbance in the history of the United States."[1] While this is only one example of uncontrolled social

Maciejewski, Anthony A.

450

Memoria de la Fundacin La Salle de Ciencias Naturales 2002 ("2000"), 154: 55-76 Resumen. Se examin la variacin temporal y espacial de la temperatura superficial de las aguas  

E-print Network

examinó la variación temporal y espacial de la temperatura superficial de las aguas marinas caribeñas de registraron temperaturas entre los 21,3 y 29,7 °C. La variación anual de los promedios mensuales en las aguas más próximas a la costa fue de ~ 5 °C y en las áreas más oceánicas de ~ 3 °C. Las aguas costeras

Meyers, Steven D.

451

Hydrologic, water-quality, and biological assessment of Laguna de las Salinas, Ponce, Puerto Rico, January 2003-September 2004  

USGS Publications Warehouse

The Laguna de Las Salinas is a shallow, 35-hectare, hypersaline lagoon (depth less than 1 meter) in the municipio of Ponce, located on the southern coastal plain of Puerto Rico. Hydrologic, water-quality, and biological data in the lagoon were collected between January 2003 and September 2004 to establish baseline conditions. During the study period, rainfall was about 1,130 millimeters, with much of the rain recorded during three distinct intense events. The lagoon is connected to the sea by a shallow, narrow channel. Subtle tidal changes, combined with low rainfall and high evaporation rates, kept the lagoon at salinities above that of the sea throughout most of the study. Water-quality properties measured on-site (temperature, pH, dissolved oxygen, specific conductance, and Secchi disk transparency) exhibited temporal rather than spatial variations and distribution. Although all physical parameters were in compliance with current regulatory standards for Puerto Rico, hyperthermic and hypoxic conditions were recorded during isolated occasions. Nutrient concentrations were relatively low and in compliance with current regulatory standards (less than 5.0 and 1.0 milligrams per liter for total nitrogen and total phosphorus, respectively). The average total nitrogen concentration was 1.9 milligrams per liter and the average total phosphorus concentration was 0.4 milligram per liter. Total organic carbon concentrations ranged from 12.0 to 19.0 milligrams per liter. Chlorophyll a was the predominant form of photosynthetic pigment in the water. The average chlorophyll a concentration was 13.4 micrograms per liter. Chlorophyll b was detected (detection limits 0.10 microgram per liter) only twice during the study. About 90 percent of the primary productivity in the Laguna de Las Salinas was generated by periphyton such as algal mats and macrophytes such as seagrasses. Of the average net productivity of 13.6 grams of oxygen per cubic meter per day derived from the diel study, the periphyton and macrophyes produced 12.3 grams per cubic meter per day; about 1.3 grams (about 10 percent) were produced by the phytoplankton (plant and algae component of plankton). The total respiration rate was 59.2 grams of oxygen per cubic meter per day. The respiration rate ascribed to the plankton (all organisms floating through the water column) averaged about 6.2 grams of oxygen per cubic meter per day (about 10 percent), whereas the respiration rate by all other organisms averaged 53.0 grams of oxygen per cubic meter per day (about 90 percent). Plankton gross productivity was 7.5 grams per cubic meter per day; the gross productivity of the entire community averaged 72.8 grams per cubic meter per day. Fecal coliform bacteria counts were generally less than 200 colonies per 100 milliliters; the highest concentration was 600 colonies per 100 milliliters.

Soler-Lpez, Luis R.; Gmez-Gmez, Fernando; Rodrguez-Martnez, Jess

2005-01-01

452

Palinspastic reconstruction of Lower Mesozoic stratigraphic sequences near the latitude of Las Vegas: Implications for the entire Great Basin  

SciTech Connect

On the Colorado Plateau, lower Mesozoic stratigraphy is subdivided by regional unconformities into the Lower Triassic Moenkopi, Upper Triassic Chinle, Lower and Middle( ) Jurassic Glen Canyon, and Middle Jurassic lower San Rafael tectonosequences. Palinspastic reconstruction for Cenozoic extensional and mesozoic compressional deformations near the latitude of Las Vegas indicates the Moenkopi tectono-sequence constructed a passive-margin-like architecture of modest width overlapping folded. Thrust-faulted, and intruded Permian strata, with state boundaries fixed relative to the Colorado Plateau, comparison of the location of the Early Triassic shelf-slope break near latitude 36[degree] with the palinspastically restored location of the shelf-slope break in southeastern Idaho implies strata of the Moenkopi tectonosequence in the Mesozoic marine province of northwest NV lay in western utah in the Early Triassic. This reconstruction: suggests that the Galconda and Last Chance faults are part of the same thrust system; aligns late Carnian paleovalleys of the chinle tectonosequence on the Colorado Plateau with a coeval northwest-trending paleovalley cut across the Star Pea, and the Norian Cottonwood paleovalley with the coeval Grass Valley delta; defines a narrow, northward deepening back-arc basin in which the Glen Canyon tectonosequence was deposited; aligns east-facing half grabens along the back side of the arc from the Cowhole Mountains to the Clan Alpine Range; projects the volcan-arc/back-arc transition from northwest Arizona to the east side of the Idaho batholith; and predicts the abrupt facies change from silicic volcanics to marine strata of the lower San Rafael sequence lay in western Utah. The paleogeographic was altered in the late Bathonian to Callovian by back-arc extension north of a line extending from Cedar City, UT to Mina, NV. The palinspastic reconstruction implies the Paleozoic was tectonically stacked at the close of the Paleozoic.

Marzolf, J.E. (Southern Illinois Univ., Carbondale, IL (United States). Dept. of Geology)

1993-04-01

453

Mobilization of Ag, heavy metals and Eu from the waste deposit of the Las Herrerias mine (Almera, SE Spain)  

NASA Astrophysics Data System (ADS)

We studied the mobility of silver, heavy metals and europium in waste from the Las Herreras mine in Almera (SE Spain). The most abundant primary mineral phases in the mine wastes are hematite, hydrohematite, barite, quartz, muscovite, anorthite, calcite and phillipsite. The minor phase consisted of primary minerals including ankerite, cinnabar, digenite, magnesite, stannite, siderite and jamesonite, and secondary minerals such as glauberite, szomolnokite, thenardite and uklonscovite. The soils show high concentrations of Ag (mean 21.6 mg kg-1), Ba (mean 2.5%), Fe (mean 114,000 mg kg-1), Sb (mean 342.5 mg kg-1), Pb (mean 1,229.8 mg kg-1), Zn (mean 493 mg kg-1), Mn (mean 4,321.1 mg kg-1), Cd (mean 1.2 mg kg-1) and Eu (mean 4.0 mg kg-1). The column experiments showed mobilization of Ag, Al, Ba, Cu, Cd, Eu, Fe, Mn, Ni, Sb, Pb and Zn, and the inverse modelling showed that the dissolution of hematite, hausmannite, pyrolusite and anglesite can largely account for the mobilization of Fe, Mn and Pb in the leaching experiment. The mobility of silver may be caused by the presence of kongsbergite and chlorargyrite in the waste, while the mobility of Eu seems to be determined by Eu(OH)3, which controls the solubility of Eu in the pH-Eh conditions of the experiments. The mineralogy, pH, Eh and geochemical composition of the mine wastes may explain the possible mobilization of heavy metals and metalloids. However, the absence of contaminants in the groundwater may be caused by the carbonate-rich environment of host-rocks that limits their mobility.

Navarro, A.; Cardellach, E.

2009-02-01

454

Sr Isotopes and Migration of Prairie Mammoths (Mammuthus columbi) from Laguna de las Cruces, San Luis Potosi, Mexico  

NASA Astrophysics Data System (ADS)

Asserting mobility of ancient humans is a major issue for anthropologists. For more than 25 years, Sr isotopes have been used as a resourceful tracer tool in this context. A comparison of the 87Sr/86Sr ratios found in tooth enamel and in bone is performed to determine if the human skeletal remains belonged to a local or a migrant. Sr in bone approximately reflects the isotopic composition of the geological region where the person lived before death; whereas the Sr isotopic system in tooth enamel is thought to remain as a closed system and thus conserves the isotope ratio acquired during childhood. Sr isotope ratios are obtained through the geologic substrate and its overlying soil, from where an individual got hold of food and water; these ratios are in turn incorporated into the dentition and skeleton during tissue formation. In previous studies from Teotihuacan, Mexico we have shown that a three-step leaching procedure on tooth enamel samples is important to assure that only the biogenic Sr isotope contribution is analyzed. The same Sr isotopic tools can function concerning ancient animal migration patterns. To determine or to discard the mobility of prairie mammoths (Mammuthus columbi) found at Laguna de las Cruces, San Luis Potosi, Mxico the leaching procedure was applied on six molar samples from several fossil remains. The initial hypothesis was to use 87Sr/86Sr values to verify if the mammoth population was a mixture of individuals from various herds and further by comparing their Sr isotopic composition with that of plants and soils, to confirm their geographic origin. The dissimilar Sr results point to two distinct mammoth groups. The mammoth population from Laguna de Cruces was then not a family unit because it was composed by individuals originated from different localities. Only one individual was identified as local. Others could have walked as much as 100 km to find food and water sources.

Solis-Pichardo, G.; Perez-Crespo, V.; Schaaf, P. E.; Arroyo-Cabrales, J.

2011-12-01

455

Las polticas territoriales de desarrollo rural de la Unin Europea: un balance de veinte aos en Castilla y Len\\/The Territorial Rural Development Policies of the European Union: A Twenty-Year Balance in Castilla y Len  

Microsoft Academic Search

La poltica especficamente agraria se ha mostrado insuficiente para dinamizar los espacios rurales de Castilla y Len, cuyas caractersticas fsicas y estructurales introducen limitaciones para la produccin en el marco competitivo de la Unin Europea. Ante esta realidad, las polticas territoriales de desarrollo rural se presentan como la alternativa para aumentar la competitividad, apoyando la reconversin, diversificando las actividades econmicas

PABLO GORDO GMEZ

2011-01-01

456

CMO COMPITEN LAS PYMES EN LOS MERCADOS INTERNACIONALES? ANLISIS DE UN CLSTER LOCAL CON VOCACIN EXPORTADORA \\/ HOW DO SMEs COMPETE IN THE INTERNATIONAL MARKET? ANALYSIS OF AN EXPORT-ORIENTED LOCAL CLUSTER  

Microsoft Academic Search

Esta investigacin trata de examinar si las empresas con distinto nivel de intensidad exportadora se diferencian respecto de los elementos competitivos que sustentan su competitividad en el mercado exterior, as como respecto de las estrategias de marketing que implementan en su actividad comercial internacional. Para ello, se examina una muestra de pymes pertenecientes a un clster agroindustrial competitivo a nivel

David Jimnez Castillo; Jos Luis Ruiz Real; Manuel Snchez Prez

2012-01-01

457

Los programas educativos de Texas A&M AgriLife Extension Service estn disponibles para todas las personas, sin distincin de raza, color, sexo, religin, origen nacional, edad, discapacidad, informacin gentica, o condicin de veterano. Revised September 2013  

E-print Network

personas, sin distinción de raza, color, sexo, religión, origen nacional, edad, discapacidad, información las personas, sin distinción de raza, color, sexo, religión, origen nacional, edad, discapacidad disponibles para todas las personas, sin distinción de raza, color, sexo, religión, origen nacional, edad

458

CALIDAD FSICO QUMICA DE LAS PRINCIPALES MARCAS DE LECHE PASTEURIZADA CONSUMIDAS EN LA CIUDAD DE MARACAIBO Physical and Chemical Quality of Main Milk Brands User sold in the City of Maracaibo  

Microsoft Academic Search

La leche es considerada un componente alimenticio que tiene como funcin, aportar al organismo los nutrientes necesarios para el desarrollo y crecimiento de los mamferos. Con el obje- tivo de estudiar la calidad fsico qumica de las 5 principales marcas de leche pasteurizada identificadas con las letras A, B, C, DyE , seanalizaron 202 muestras de leche recolectadas al azar,

Wilfido Jos Briez; Emiro Valbuena; Gustavo Castro; Flor Fuentes; Delia Gonzlez; Armando Tovar

2002-01-01

459

224. Toda cosa tiene un lado bueno y otro malo: aprende a buscarlos. Toma todo por el lado conveniente. Nunca en forma rabiosa, aunque venga as. Todas las cosas tienen un derecho y  

E-print Network

conveniente. Nunca en forma rabiosa, aunque venga así. Todas las cosas tienen un derecho y un revés. De modo. En palabras de Gracián, todas las cosas tienen un derecho y un revés y los fracasos temporales en la

Muiño, Ricardo Díez

460

Geologic and geophysical maps of the Las Vegas 30' x 60' quadrangle, Clark and Nye counties, Nevada, and Inyo County, California  

USGS Publications Warehouse

Las Vegas and Pahrump are two of the fastest growing cities in the US, and the shortage of water looms as among the greatest future problems for these cities. These new maps of the Las Vegas 30 x 60-minute quadrangle provide a geologic and geophysical framework and fundamental earth science database needed to address societal issues such as ground water supply and contamination, surface flood, landslide, and seismic hazards, and soil properties and their changing impact by and on urbanization. The mountain ranges surrounding Las Vegas and Pahrump consist of Mesozoic, Paleozoic and Proterozoic rocks. A majority of these rocks are Paleozoic carbonate rocks that are part of Nevada's carbonate rock aquifer province. The Spring Mountains represent a major recharge site in the province, where maximum altitude is 3,632 m (Charleston Peak) above sea level. Rocks in the Sheep and Las Vegas Ranges and Spring Mountains contain correlative, northeast-striking, southeast-verging thrust faults that are part of the Cretaceous, Sevier orogenic belt. These thrusts were offset during the Miocene by the Las Vegas Valley shear system (LVVSZ). We conducted new mapping in the Blue Diamond area, highlighting refined work on the Bird Spring thrust, newly studied ancient landslides, and gravity-slide blocks. We conducted new mapping in the Las Vegas Range and mapped previously unrecognized structures such as the Valley thrust and fold belt; recognition of these structures has led to a refined correlation of Mesozoic thrust faults across the LVVSZ. New contributions in the quadrangle also include a greatly refined stratigraphy of Paleozoic bedrock units based on conodont biostragraphy. We collected over 200 conodont samples in the quadrangle and established stratigraphic reference sections used to correlate units across the major Mesozoic thrust faults. Quaternary deposits cover about half of the map area and underlie most of the present urbanized area. Deposits consist of large coalescing alluvial fans that grade downslope to extensive areas of fine-grained sediment indicative of groundwater-discharge during the Pleistocene. In the central areas of Las Vegas and Pahrump valleys, Quaternary fault scarps associated with past ground-water discharge deposits suggest a genetic relationship. In collaboration with NBMG and University of Nevada, a variety of ages of gravelly alluvium are newly mapped using surficial characteristics and soil development, along with reassessment of previously published mapping during compilation. Reconnaissance geochronology (thermoluminescence and U-series) of eolian and authigenic components of surficial and buried soils and spring deposits is applied to test hypotheses of geomorphic and hydrologic response to climate change over the past 100 k.y.). The major structure in the Las Vegas quadrangle is the LVVSZ. Because the LVVSZ is concealed by thick basin-fill deposits of Quaternary and Tertiary age, it was characterized primarily based on geophysics. Likewise, the newly described State line fault system in Pahrump Valley has also been characterized by geophysics, where geophysically inferred structures correlate remarkably with surface structures defined by our new geologic mapping in the Mound Spring and Hidden Hills Ranch 7.5-minute quadrangles.

Page, William R.; Lundstrom, Scott C.; Harris, Anita G.; Langenheim, Victoria E.; Workman, Jeremiah B.; Mahan, Shannon A.; Paces, James B.; Dixon, Gary L.; Rowley, Peter D.; Burchfiel, B.C.; Bell, John W.; Smith, Eugene I.

2005-01-01

461

Analysis of Individual Carbonaceous Particles Emitted from the Las Conchas Wildfire, Los Alamos, NM, in June-July 2011  

NASA Astrophysics Data System (ADS)

Carbonaceous aerosol emitted from biomass burning contributes significantly to atmospheric aerosol loadings regionally and globally. The net direct radiative forcing of biomass burning aerosol can be positive and/or negative and this depends on its composition, morphology and mixing state. Biomass burning aerosols can also change the cloud properties as they can act as cloud condensation nuclei. In this study we investigated biomass burning particles emitted from the Las Conchas wildfire in northern New Mexico that started on June 26, 2011 and burned an area of 245 square miles. Aerosol samples were collected on nucleopore filters at the Los Alamos National Laboratory during the third week of the wildfire event. Individual particles (~4000) were investigated using field-emission scanning electron microscopy and energy dispersive X-ray spectroscopy (EDS) to distinguish different carbonaceous particles and their shape, size, elemental composition and mixing state. A thermo-denuder was used to remove compounds that are volatile at temperatures up to 200 C, leaving behind the black carbon and any compounds that did not volatize completely. Smoke particles consisted of a) tar balls, which are amorphous spherical carbonaceous organic aerosols; b) organic particles with inorganic inclusions, c) soot particles and (d) soot with various inclusions. Two distinct kinds of tar balls, "electronically" dark and bright, were found using the field-emission scanning electron microscopy and were characterized for ambient and denuded conditions to understand coating effects and aging. It was found that dark tar balls are generally larger in size than the bright ones. Additionally, the difference between the size of ambient-bright and the size of denuded-bright tar balls was larger than the difference between the size of ambient-dark and the size of denuded-dark tar balls. EDS analysis showed that 70% of the dark tar balls had higher (~60%) relative oxygen content than in the bright tar balls. We conclude that there are two distinct kinds of biomass burning tar balls and that dark tar balls are less volatile than bright tar balls. The morphology of soot particles was also investigated by evaluating their fractal dimension for both ambient (coated with organic and inorganic material) and denuded samples at two different times of the day. The fractal dimension for ambient soot was found to be higher than for denuded soot due to the coating on the ambient soot particles. Finally, the monomer diameter decreased by up to 25% after denuding the particles. This study provides insights on the link between electron microscopy images of single particles and the mixing state, morphology, and evolution of different biomass burning aerosol at the beginning of their lifecycle.

Mazzoleni, C.; China, S.; Gorkowski, K.; Flowers, B. A.; Aiken, A. C.; Dubey, M. K.

2012-12-01

462

En este nmero del boletn los puntos de atencin son las relaciones comerciales de Mxico y los aspectos sustantivos vinculados a la produc-  

E-print Network

alcanzado este producto en el mercado internacional. Por otra parte, las exportaciones no petroleras están. PRESENTACI?N México, D.F., Marzo 2012Número 19 INSTITUTO DE INVESTIGACIONES ECON?MICAS-UNAM Boletín mensual Investigaciones Económicas, Circuito Mario de la Cueva s/n, Ciudad de la Investigación en Humanidades, Ciudad

Islas, León

463

Gaseous Mercury Monitoring at a Complex Source: The Las Cuevas Decommissioned Mining Complex and Current Hg Storage Facility (Almadn District, Spain)  

NASA Astrophysics Data System (ADS)

The Las Cuevas decommissioned mining complex was the third in importance in the worlds largest mercury mining district: Almadn (south-central Spain). Mining took place during two well differentiated periods: 1. Roman time; and 2. From 1982 to 2000. In 2004 the mine was transformed into a mercury storage and handling facility, away from urban areas. Furthermore, the area served as a test site for the design and implementation of a mercury safe storage vessel, a study funded by European LIFE-Env programme (Project MERSADE, LIFE06 ENV/ES/PREP/03) (Llanos et al., 2010). On this basis, Las Cuevas site can be regarded as a complex source of atmospheric mercury for the local environmental compartments, including emissions from the plant activity, partly reclamated old mineral dumps, contaminated soils, and other minor sources, such as cavities produced by mine collapse. We studied the emissions with two LUMEX RA-915+ Hg analyzers, one LUMEX RA-915Light device and a complete TEKRAN equipment, including Mercury Speciation Unit (model 1130) and Particulate Mercury Unit (Model 1135). Data has been treated with ISC-AERMOD program, in order to obtain models for contamination plumes derived from Las Cuevas whole area. The results confirm the mercury storage facility as the main local source for mercury, releasing some 3,15 kg Hg y-1, whereas contaminated soils and reclamated dumps represent local minor sources. Over 99,9% of local atmospheric mercury is Gaseous Elemental Mercury, with Reactive Gaseous Mercury representing 0,25 per mil, and particulate bound mercury, 1,8 per mil. Citation: Llanos, W.; Higueras, P.; Oyarzun, R.; Esbr, J.M.; Lpez-Berdonces, M.A.; Garca-Noguero, E.M.; Martnez-Coronado, A. (2010) A preliminary environmental assessment at the site of the European prototype installation of a safe deposit for surplus mercury from industry: The Las Cuevas mining complex, Almadn District, Spain. Science of the Total Environment, 408: 4901-4905.

Higueras, P. L.; Esbri, J. M.; Llanos, W. R.; Oyarzun, R.; Martinez-Coronado, A.; Grupo de Estudios En Minera Y Medioambiente-Gemm

2010-12-01

464

Ground-water conditions in Las Vegas Valley, Clark County, Nevada; Part 2, Hydrogeology and simulation of ground-water flow  

USGS Publications Warehouse

In sedimentary deposits beneath arid Las Vegas Valley, ground-water levels have declined as much as 280 feet since 1912 in deeper aquifers due to pumping associated with urban development. Accompanying land subsidence has been as great as 5 feet. Predictive simulations show that by maintaining pumpage and recharge at 1980 levels and using municipal wells only during periods of peak water demand, rates of water-level decline and land subsidence will be reduced.

Morgan, David S.; Dettinger, Michael D.

1996-01-01

465

American Recovery and Reinvestment Act (ARRA) FEMP Technical Assistance Federal Aviation Administration Project 209 - Control Tower and Support Building, Las Vegas, NV  

SciTech Connect

This report represents findings of a design review team that evaluated construction documents (at the 70% level) and operating specifications for a new control tower and support building that will be built in Las Vegas, Nevada by the Federal Aviation Administration (FAA). The focus of the review was to identify measures that could be incorporated into the final design and operating specification that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.

2010-03-31

466

Real-Time Access to Altimetry and Operational Oceanography Products via OPeNDAP/LAS Technologies : the Example of Aviso, Mercator and Mersea Projects  

NASA Astrophysics Data System (ADS)

The Products and Services (P&S) department in the Space Oceanography Division at CLS is in charge of diffusing and promoting altimetry and operational oceanography data. P&S is so involved in Aviso satellite altimetry project, in Mercator ocean operational forecasting system, and in the European Godae /Mersea ocean portal. Aiming to a standardisation and a common vision and management of all these ocean data, these projects led to the implementation of several OPeNDAP/LAS Internet servers. OPeNDAP allows the user to extract via a client software (like IDL, Matlab or Ferret) the data he is interested in and only this data, avoiding him to download full information files. OPeNDAP allows to extract a geographic area, a period time, an oceanic variable, and an output format. LAS is an OPeNDAP data access web server whose special feature consists in the facility for unify in a single vision the access to multiple types of data from distributed data sources. The LAS can make requests to different remote OPeNDAP servers. This enables to make comparisons or statistics upon several different data types. Aviso is the CNES/CLS service which distributes altimetry products since 1993. The Aviso LAS distributes several Ssalto/Duacs altimetry products such as delayed and near-real time mean sea level anomaly, absolute dynamic topography, absolute geostrophic velocities, gridded significant wave height and gridded wind speed modulus. Mercator-Ocean is a French operational oceanography centre which distributes its products by several means among them LAS/OPeNDAP servers as part of Mercator Mersea-strand1 contribution. 3D ocean description (temperature, salinity, current and other oceanic variables) of the North Atlantic and Mediterranean are real-time available and weekly updated. LAS special feature consisting in the possibility of making requests to several remote data centres with same OPeNDAP configurations particularly fitted to Mersea strand-1 problematics. This European project (June 2003 to June 2004) sponsored by the European Commission was the first experience of an integrated operational oceanography project. The objective was the assessment of several existing operational in situ and satellite monitoring and numerical forecasting systems for the future elaboration (Mersea Integrated Project, 2004-2008) of an integrated system able to deliver, operationally, information products (physical, chemical, biological) towards end-users in several domains related to environment, security and safety. Five forecasting ocean models with data assimilation coming from operational in situ or satellite data centres, have been intercompared. The main difficulty of this LAS implementation has lied in the ocean model metrics definition and a common file format adoption which forced the model teams to produce the same datasets in the same formats (NetCDF, COARDS/CF convention). Notice that this was a pioneer approach and that it has been adopted by Godae standards (see F. Blanc's paper in this session). Going on these web technologies implementation and entering a more user-oriented issue, perspectives deal with the implementation of a Map Server, a GIS opensource server which will communicate with the OPeNDAP server. The Map server will be able to manipulate simultaneously raster and vector multidisciplinary remote data. The aim is to construct a full complete web oceanic data distribution service. The projects in which we are involved allow us to progress towards that.

Baudel, S.; Blanc, F.; Jolibois, T.; Rosmorduc, V.

2004-12-01

467

Evapotranspiration of Mixed Shrub Communities in Phreatophytic Zones of the Great Basin D.A. Devitt1, L.K. Fenstermaker2, M. Young2, B. Conrad1 and B. Bird1 1 School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 2 Desert Research Institute, Las Vegas, NV  

NASA Astrophysics Data System (ADS)

Water limitations in the arid and semiarid regions of the southwestern United States have led many water managers of municipalities to begin the process of diversifying their water resource portfolios. Las Vegas in particular, is pursuing groundwater exportation from east central basins in Nevada. Estimating evapotranspiration (ET) is a critical component to closing hydrologic balances in these basins. As such, ET was estimated for three valleys in the Great Basin Region of Nevada (USA) during a three year period. ET estimates were made based on an energy balance approach using the eddy covariance method. ET estimates at the basin scale were made by developing empirical relationships between ET and remotely sensed spectral data (Landsat). Groundwater, soil moisture, rainfall and leaf level measurements were used to validate the differences in ET estimates based on site, year and basin. When the ET correlations were based on average NDVI values during the growing period and incorporated previously published values attained for the same valleys during the same time period, we could account for 97% of the variation in the ET estimate for the May 10 to September 5 growing period and 93% of the variation in the ET estimates based on measured or projected yearly ET totals. Variations in yearly ET estimates at the different shrub and grassland sites ranged from 20 to 50 cm during the two dry years (2006, 2007, not including the irrigated site). The amount of winter precipitation was shown to be a significant driving force in the physiological response of the plants and the yearly ET totals. In the case of White River Valley the ratio of winter precipitation to reference evapotranspiration declined from 79% to 11% over the 3 year monitoring period. Such changes led to a direct impact on leaf xylem water potential values of greasewood (Sarcobatus vermiculatus). During the two drier years (2006 and 2007) greasewood plants entered into the growing period with lower mid day levels of ?L reflecting the significant step down in the ratio of winter precipitation to reference evapotranspiration. ET rates in 2007 were highly correlated with the percent cover of greasewood at the monitoring sites (R2=0.96***), regardless of the depth to groundwater. In 2006 both sites which were monitored for an entire 12 month period, ET was shown to exceed precipitation by 55 to 60%. Although a certain amount of uncertainty must be attached to the basin level ET estimates, results suggested that all three basins had annual ET totals in the 150 to 300 million m3 range, with a significant decline from the wetter 2005 year to the drier 2007 year (30 to 47% decline).The utility of the equations generated in this study will need to be further tested over time to capture the intra and inter annual variability in ET at these sites and basins before long term hydrologic balances can be properly assessed.

Devitt, D. A.; Fenstermaker, L. K.; Young, M.; Conrad, B.; Bird, B.

2009-12-01

468

Two Enzymes of a Complete Degradation Pathway for Linear Alkylbenzenesulfonate (LAS) Surfactants: 4-Sulfoacetophenone Baeyer-Villiger Monooxygenase and 4-Sulfophenylacetate Esterase in Comamonas testosteroni KF-1  

PubMed Central

Complete biodegradation of the surfactant linear alkylbenzenesulfonate (LAS) is accomplished by complex bacterial communities in two steps. First, all LAS congeners are degraded into about 50 sulfophenylcarboxylates (SPC), one of which is 3-(4-sulfophenyl)butyrate (3-C4-SPC). Second, these SPCs are mineralized. 3-C4-SPC is mineralized by Comamonas testosteroni KF-1 in a process involving 4-sulfoacetophenone (SAP) as a metabolite and an unknown inducible Baeyer-Villiger monooxygenase (BVMO) to yield 4-sulfophenyl acetate (SPAc) from SAP (SAPMO enzyme); hydrolysis of SPAc to 4-sulfophenol and acetate is catalyzed by an unknown inducible esterase (SPAc esterase). Transcriptional analysis showed that one of four candidate genes for BVMOs in the genome of strain KF-1, as well as an SPAc esterase candidate gene directly upstream, was inducibly transcribed during growth with 3-C4-SPC. The same genes were identified by enzyme purification and peptide fingerprinting-mass spectrometry when SAPMO was enriched and SPAc esterase purified to homogeneity by protein chromatography. Heterologously overproduced pure SAPMO converted SAP to SPAc and was active with phenylacetone and 4-hydroxyacetophenone but not with cyclohexanone and progesterone. SAPMO showed the highest sequence homology to the archetypal phenylacetone BVMO (57%), followed by steroid BVMO (55%) and 4-hydroxyacetophenone BVMO (30%). Finally, the two pure enzymes added sequentially, SAPMO with NADPH and SAP, and then SPAc esterase, catalyzed the conversion of SAP via SPAc to 4-sulfophenol and acetate in a 1:1:1:1 molar ratio. Hence, the first two enzymes of a complete LAS degradation pathway were identified, giving evidence for the recruitment of members of the very versatile type I BVMO and carboxylester hydrolase enzyme families for the utilization of a xenobiotic compound by bacteria. PMID:23001656

Weiss, Michael; Denger, Karin; Huhn, Thomas

2012-01-01

469

Las Alpujarras region (South East Spain) HLA genes study: evidence of a probable success of 17th century repopulation from North Spain.  

PubMed

Conquest of Granada Muslim Kingdom (1492 AD) finished with Muslim occupation; they were mostly North African Berbers who had reached Iberia by 711 AD. A politics of Iberian Christianization followed after this date: Jewish were expelled in 1492 and Moriscos (Spaniards practicing Muslim religion or speaking Arab) were expelled from all Spanish territory on 1609 AD. Las Alpujarras is a southern Spain mountainous secluded region, which underwent a repopulation from North Spain and a specific Muslim (Moriscos)-Christian war took place according to historical records. Both Las Alpujarras repopulation by northern Iberians and Moriscos expulsion success have been debated and are regarded as non-clarified episodes. In this study, we have addressed the question whether the repopulation succeeded by determining HLA genes of present day Las Alpujarras inhabitants and compared with those of other Mediterranean populations HLA frequencies and genealogies. HLA frequencies show ambiguous results because of extant HLA similar gene frequencies there exist in North Africa and Spain. This is reflected by the finding of North and South western Mediterraneans close relatedness of HLA dendrograms and correspondence analyses. However, the genealogical study of extended HLA haplotypes particularly Alpujarran high frequency of HLA-A29-B44-DRB1*0701-DQA1*02-DQB1*02 (not found in Algerians but frequent in North and Central Spain) and Alpujarran low frequency extended haplotype HLA-A3-B7-DRB1*1501-DQA1*0102-DQB1*0602 (frequent in North Europe) reveals that a significant HLA gene flow from North Spain is observed in present day Alpujarrans: both haplotypes are characteristic of North Spain and North Europe, respectively. This may indicate that enforced Alpujarran repopulation from North Spain may have been a success, which was started by Spanish King Philip II in 1571 AD. PMID:21633894

Longs, Javier; Martnez-Laso, Jorge; Rey, Diego; Areces, Cristina; Casado, Eduardo Gmez; Parga-Lozano, Carlos; Luna, Francisco; de Salamanca, Mercedes Enriquez; Moral, Pedro; Arnaiz-Villena, Antonio

2012-02-01

470

Effects of illegal harvest of eggs on the population decline of leatherback turtles in Las Baulas Marine National Park, Costa Rica.  

PubMed

Within 19 years the nesting population of leatherback turtles (Dermochelys coriacea) at Parque Nacional Marino Las Baulas declined from 1500 turtles nesting per year to about 100. We analyzed the effects of fishery bycatch and illegal harvesting (poaching) of eggs on this population. We modeled the population response to different levels of egg harvest (90, 75, 50, and 25%) and the effect of eradicating poaching at different times during the population decline. We compared effects of 90% poaching with those of 20% adult mortality because both of these processes were present in the population at Las Baulas. There was a stepwise decline in number of nesting turtles at all levels of egg harvest. Extirpation times for different levels of poaching ranged from 45 to 282 years. The nesting population declined more slowly and survived longer with 20% adult mortality (146 years) than it did with 90% poaching (45 years). Time that elapsed until poaching stopped determined the average population size at which the population stabilized, ranging from 90 to 420 nesting turtles. Our model predicted that saving clutches lost naturally would restore the population when adult mortality rates were low and would contribute more to population recovery when there were short remigration intervals between nesting seasons and a large proportion of natural loss of clutches. Because the model indicated that poaching was the most important cause of the leatherback decline at Las Baulas, protecting nests on the beach and protecting the beach from development are critical for survival of this population. Nevertheless, the model predicted that current high mortality rates of adults will prevent population recovery. Therefore, protection of the beach habitat and nests must be continued and fishery bycatch must be reduced to save this population. PMID:18637915

Tomillo, Pilar Santidrin; Saba, Vincent S; Piedra, Rotney; Paladino, Frank V; Spotila, James R

2008-10-01

471

210Pb-derived history of PAH and PCB accumulation in sediments of a tropical inner lagoon (Las Matas, Gulf of Mexico) near a major oil refinery  

NASA Astrophysics Data System (ADS)

Concentrations of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) were measured in a sediment core from the tropical freshwater inner lagoon of Las Matas, near the petroleum industrial area of Minatitln-Coatzacoalcos, in the Gulf of Mexico. A 210Pb-derived chronology was used to reconstruct the historical PAH and PCB accumulation in the site during one century (1906-2005). Both geochemical and sedimentological data indicated that a major change occurred in 1947 4, including a shift to coarser sediments and a significant decrease of Al, Li, Fe, organic C and total N contents. This was likely due to the changes in hydrology caused by the confinement of Las Matas Lagoon due to the construction of the Trans-Isthmus road in 1946. PAHs in these samples show relatively low concentrations (259-1176 ng g-1), and the congener relative abundances indicate the influence of pyrogenic (petroleum combustion) sources. Total PCB concentrations in the sediments ranged from 24 to 77 ng g-1, and are composed by low chlorinated PCBs, with 3- and 4-CB as the prevalent species (51-65% and 29-40%, respectively). PAHs and PCBs were detected at depths corresponding to the early 1900s, when Minatitln refinery started operations, although their time evolution appears to be influenced by different accumulation processes. The PCB background is most likely produced by the combustion of natural organic matter, and an industrial contribution can be recognized when normalizing with OC contents. We concluded that atmospheric deposition is the most significant source of PAHs and PCBs for this water body. This study also provided evidence of the alteration of the wetlands surrounding this industrial area due to urbanization; the fragmentation and alteration of Las Matas Lagoon hydrology contributes to the gradual loss of the wetlands in the zone.

Ruiz-Fernndez, Ana Carolina; Sprovieri, Mario; Piazza, Rossano; Frignani, Mauro; Sanchez-Cabeza, Joan-Albert; Feo, Maria Luisa; Bellucci, Luca Giorgio; Vecchiato, Marco; Prez-Bernal, Libia Hascibe; Pez-Osuna, Federico

2012-04-01

472

For nearly 50 years the School of Nursing at the University of Nevada, Las Vegas has been educating nurses, improving patient care, and helping Nevadans lead healthier lives. We are shaping the future of the health care  

E-print Network

, Las Vegas has been educating nurses, improving patient care, and helping Nevadans lead healthier lives to prevent diabetes and maintain healthy lifestyles. ·In the last few years, UNLV has graduated more than 600

Hemmers, Oliver

473

Risk-induced social impacts: The effects of the proposed nuclear waste repository on residents of the Las Vegas metropolitan area  

SciTech Connect

This report examines important and major impacts of the proposed high-level nuclear waste repository on Las Vegas metropolitan residents. The data utilized in the report consist of interview data collected in the 1988, Urban Risk Survey and data for Clark County residents collected as part of the 1989 Nevada Telephone Survey. The use of two different data sets which were collected at two distinct points in time permit for not only determinations of the consistency of opinions and risk perceptions, but also result in a compelling consistency of findings demonstrating the types of impacts described in the report. The repository is viewed as an extremely dangerous facility where accidents are perceived as inevitable, and the consequences may result in catastrophic impacts. Over the last few years, the negative imagery of the repository, coupled with the view that the area may become stigmatized has amplified the perceived risks over the benefits. In addition, Las Vegas valley residents have little trust in the agencies empowered to ensure their safety and to mitigate the impacts from the facility. In this context it is difficult to believe that the federal agencies can regain much credibility among Clark County residents, or that the major impacts outlined in the report if the Yucca Mountain project becomes a reality will not come about. 20 refs., 3 figs., 36 tabs.

Mushkatel, A.H.; Pijawka, K.D.; Dantico, M. [Arizona State Univ., Tempe, AZ (USA)

1990-09-01

474

Comparing the suitability of geophysical methods in the study of a cave in marbles: A case study of Gruta de las Maravillas (Aracena, Southwest Spain)  

NASA Astrophysics Data System (ADS)

Different geophysical methods have been applied to determine the geometry of caves, considering the host rock, depth, dimension, presence of water and other parameters. The Gruta de las Maravillas cave is located in marbles interlayered with gneiss, quartzite and granodiorite along the suture between South Portuguese and Ossa Morena zone. This cave is probably formed as a consequence of the presence of pyrite and iron oxides mineralization that interacted with the surrounding marble host rocks. In order to analyze the continuity of the Gruta de las Maravillas cave (Aracena, southwest Spain) geophysical methods has been used on the known cave in order to check their suitability. These results allow investigating the prolongation of the cave in surrounding areas, performing a comprehensive study of the Cerro del Castillo hill containing the cavity. Microtopography with differential GPS and cave topography with an accuracy of 0.01 m were measured. The first geophysical method employed were a regional microgravity, with and SCINTREX CG-5 gravimeter that reaches an accuracy up to 0.001 mGal. In the obtained residual anomaly map, negative values are associated with negative density contrast, which are related to the known cave position. In addition, residual gravity minima suggest the presence of other unknown cavities. The anomalies attributed to possible new shallow and deep caves have been studied in a second step with the application of other eight detailed geophysical methods along profiles to test the response of each of them to the presence of cavities: microgravity, magnetic, electrical resistivity tomography, induced polarization, seismic P-waves velocity tomography, ray tracing coverage, common offset and ground-penetrating radar. Moreover, the known cave has walls covered with iron oxides that determine magnetic anomaly minima and intermediate resistivity values (~2000 ohm.m) on the ERT profiles versus the host marble rocks (~45000 ohm.m). After a detailed comparison of each method, the best results are obtained by microgravity and ray tracing coverage. Other methods allow to support and precise the cave geometry obtained. The possible continuity of the known Gruta de las Maravillas cave is proposed after this detailed study, practically doubling the extent of present day know cave.

Jos Martnez Moreno, Francisco; Galindo Zaldvar, Jess; Pedrera Parias, Antonio; Ullod, Teresa Teixid i.; Ruano Roca, Patricia; Pea Ruano, Jose Antonio; Gonzlez Castillo, Lourdes; Ruiz Constan, Ana; Lpez Chicano, Manuel; Martn Rosales, Wenceslao

2014-05-01

475

Postwildfire preliminary debris flow hazard assessment for the area burned by the 2011 Las Conchas Fire in north-central New Mexico  

USGS Publications Warehouse

The Las Conchas Fire during the summer of 2011 was the largest in recorded history for the state of New Mexico, burning 634 square kilometers in the Jemez Mountains of north-central New Mexico. The burned landscape is now at risk of damage from postwildfire erosion, such as that caused by debris flows and flash floods. This report presents a preliminary hazard assessment of the debris-flow potential from 321 basins burned by the Las Conchas Fire. A pair of empirical hazard-assessment models developed using data from recently burned basins throughout the intermountain western United States was used to estimate the probability of debris-flow occurrence and volume of debris flows at the outlets of selected drainage basins within the burned area. The models incorporate measures of burn severity, topography, soils, and storm rainfall to estimate the probability and volume of debris flows following the fire. In response to a design storm of 28.0 millimeters of rain in 30 minutes (10-year recurrence interval), the probabilities of debris flows estimated for basins burned by the Las Conchas Fire were greater than 80 percent for two-thirds (67 percent) of the modeled basins. Basins with a high (greater than 80 percent) probability of debris-flow occurrence were concentrated in tributaries to Santa Clara and Rio del Oso Canyons in the northeastern part of the burned area; some steep areas in the Valles Caldera National Preserve, Los Alamos, and Guaje Canyons in the east-central part of the burned area; tributaries to Peralta, Colle, Bland, and Cochiti canyons in the southwestern part of the burned area; and tributaries to Frijoles, Alamo, and Capulin Canyons in the southeastern part of the burned area (within Bandelier National Monument). Estimated debris-flow volumes ranged from 400 cubic meters to greater than 72,000 cubic meters. The largest volumes (greater than 40,000 cubic meters) were estimated for basins in Santa Clara, Los Alamos, and Water Canyons, and for two basins at the northeast edge of the burned area tributary to Rio del Oso and Vallecitos Creek. The Combined Relative Debris-Flow Hazard Rankings identify the areas of highest probability of the largest debris flows. Basins with high Combined Relative Debris-Flow Hazard Rankings include upper Santa Clara Canyon in the northern section of the burn scar, and portions of Peralta, Colle, Bland, Cochiti, Capulin, Alamo, and Frijoles Canyons in the southern section of the burn scar. Three basins with high Combined Relative Debris-Flow Hazard Rankings also occur in areas upstream from the city of Los Alamosthe city is home to and surrounded by numerous technical sites for the Los Alamos National Laboratory. Potential debris flows in the burned area could affect the water supply for Santa Clara Pueblo and several recreational lakes, as well as recreational and archeological resources in Bandelier National Monument. Debris flows could damage bridges and culverts along State Highway 501 and other roadways. Additional assessment is necessary to determine if the estimated volume of material is sufficient to travel into areas downstream from the modeled basins along the valley floors, where they could affect human life, property, agriculture, and infrastructure in those areas. Additionally, further investigation is needed to assess the potential for debris flows to affect structures at or downstream from basin outlets and to increase the threat of flooding downstream by damaging or blocking flood mitigation structures. The maps presented here may be used to prioritize areas where erosion mitigation or other protective measures may be necessary within a 2- to 3-year window of vulnerability following the Las Conchas Fire.

Tillery, Anne C.; Darr, Michael J.; Cannon, Susan H.; Michael, John A.

2011-01-01

476

Environmental and geochemical record of human-induced changes in C storage during the last millennium in a temperate wetland (Las Tablas de Daimiel National Park, central Spain)  

USGS Publications Warehouse

Las Tablas de Daimiel National Park has experienced many hydrological and ecological modifications through out its history, both of natural as well as anthropogenic origin, which have affected its carbon storage capacity and carbon fluxes. The study of those variations has been carried out by the analysis of its sedimentary record (geochemistry and pollen) and historical data. The natural changes have a wider variation range than the anthropogenic ones, show repetitive patterns and the system reacts readjusting the equilibrium among its components. Anthropogenic effects depend on the direct or indirect impact on the wetlands of change and its intensity. In addition, the anthropogenic impacts have the capacity of breaking the natural balance of the ecosystem and the internal interactions. ?? 2006 The Authors Journal compilation ?? 2006 Blackwell Munksgaard.

Dominguez-Castro, F.; Santisteban, J. I.; Mediavilla, R.; Dean, W. E.; Lopez-Pamo, E.; Gil-Garcia, M. J.; Ruiz-Zapata, M. B.

2006-01-01

477

Estimates of hydraulic properties from a one-dimensional numerical model of vertical aquifer-system deformation, Lorenzi site, Las Vegas, Nevada  

USGS Publications Warehouse

Land subsidence related to aquifer-system compaction and ground-water withdrawals has been occurring in Las Vegas Valley, Nevada, since the 1930's, and by the late 1980's some areas in the valley had subsided more than 5 feet. Since the late 1980's, seasonal artificial-recharge programs have lessened the effects of summertime pumping on aquifer-system compaction, but the long-term trend of compaction continues in places. Since 1994, the U.S. Geological Survey has continuously monitored water-level changes in three piezometers and vertical aquifer-system deformation with a borehole extensometer at the Lorenzi site in Las Vegas, Nevada. A one-dimensional, numerical, ground-water flow model of the aquifer system below the Lorenzi site was developed for the period 1901-2000, to estimate aquitard vertical hydraulic conductivity, aquitard inelastic skeletal specific storage, and aquitard and aquifer elastic skeletal specific storage. Aquifer water-level data were used in the model as the aquifer-system stresses that controlled simulated vertical aquifer-system deformation. Nonlinear-regression methods were used to calibrate the model, utilizing estimated and measured aquifer-system deformation data to minimize a weighted least-squares objective function, and estimate optimal property values. Model results indicate that at the Lorenzi site, aquitard vertical hydraulic conductivity is 3 x 10-6 feet per day, aquitard inelastic skeletal specific storage is 4 x 10-5 per foot, aquitard elastic skeletal specific storage is 5 x 10-6 per foot, and aquifer elastic skeletal specific storage is 3 x 10-7 per foot. Regression statistics indicate that the model and data provided sufficient information to estimate the target properties, the model adequately simulated observed data, and the estimated property values are accurate and unique.

Pavelko, Michael T.

2004-01-01

478

Shallow ground water in the Whitney Area, southeastern Las Vegas Valley, Clark County, Nevada - Part 1. Description of chemical quality, 1986-87  

SciTech Connect

A prototype groundwater detention basin was proposed by the US Bureau of Reclamation to reduce the quantity of dissolved solids entering Las Vegas Wash, Nevada from groundwater seepage, as part of an overall plan to reduce salinity in the lower Colorado River. This report describes groundwater quality in the area of the proposed basin and processes that may control the chemical quality. The 1-sq mi study area is adjacent to the wash jest downstream from two wastewater treatment facilities. The sediments beneath the proposed detention basin are primarily flood-plain deposits dominated by silt near land surface, silty sand between depths of 10 and 25 ft, and silt and clay below about 25 ft. Groundwater flow generally parallels the course of Las Vegas Wash. The water table at the proposed basin site is generally 1 to 4 ft below land surface, and it fluctuates seasonally in response to the changing rates of evapotranspiration. Water samples were collected during a 16 month period from about 65 wells ranging in depth 5 to 45 ft. Measured dissolved-solids concentrations in the shallow groundwater range from about 2,000 mg/L, in an area affected by seepage of treated effluent and urban and storm runoff, to about 28,000 mg/L along the western edge of the study area. Geochemical interpretation of the water-quality data suggests that the amount and distribution of major ions in the groundwater is controlled by: seepage of treated effluent and urban runoff; dissolution of minerals by groundwater; and evapotranspiration, which tends to concentrate solutes near the water table.

Emme, D.H.; Prudic, D.E. (Geological Survey, Carson City, NV (United States))

1991-01-01

479

Similarities in the dolomitization of upper Miocene reef complexes in Mallorca and the Las Negras areas, Spain: Possible evidence for a Mediterranean dolomitizing event during the Messinian  

SciTech Connect

Reef complexes in the Las Negras area and the island of Mallorca, over 600 km to the northeast, contain dolomite with remarkably similar stratigraphic distribution and petrographic characteristics. In both reef complexes dolomite occurs as 5-50 {mu}m euhedral cements and microcrystalline replacement of red-algal fragments and muds. In addition, anhedral, moldic-zoned dolomite cements (5-20 {mu}m) are abundant in the youngest reefs of both areas. All inter-reefal erosional surfaces are cross-cut by dolomite cements. Distribution of dolomite within the reefal sequences is controlled by (1) proximity to the youngest reef margin. Dolomite abundances decrease from 100% to 0% over a 10 km transect into the platform interior in Mallorca. Stratigraphic and petrographic timing support a dolomitization event following exposure of the reefs, during initial deposition of the onlapping Messinian sequence in Mallorca, and before Pliocene deposition in Las Negras. In both areas, dolomitization took place as a Messinian transgression covered the reefs. Evidence for multiple dolomitization events has not been found. Mallorcan dolomites have heavy stable isotopes suggesting saline dolomitizing fluids. One hypothesis for dolomitization invokes brines associated with the deposition of extensive Messinian basinal evaporites. An early Messinian evaporitic lowstand could concentrate marine brines, and with the ensuing transgression bring them in contact with CaCo{sub 3} platforms, dolomitizing them. The similar styles and timing of dolomitization in these two distinct and distant reef settings suggest that dolomitization of late Miocene reefs around the western Mediterranean may have been genetically related to the Messinian salinity crisis.

Oswald, E.J.; Meyers, W.J. (SUNY, Stony Brook, NY (United States)); Franseen, E.K. (Univ. of Kansas, Lawrence (United States))

1991-03-01