Este artículo describe el Festival de Arte de Fort Worth, donde un gran número de artistas hispanos venden sus obras. Se incluye tanto el artículo original en español como la traducción al inglés.

In situ fracture mechanical deformation and fluid flowinteractions are investigated through a series of hydraulic pulseinjection tests, using specialized borehole equipment that cansimultaneously measure fluid pressure and fracture displacements. Thetests were conducted in two horizontal boreholes spaced one meter apartvertically and intersecting a near-vertical highly permeable faultlocated within a shallow fractured carbonate rock. The field data wereevaluated by conducting a series of coupled hydromechanical numericalanalyses, using both distinct-element and finite-element modelingtechniques and both two- and three-dimensional model representations thatcan incorporate various complexities in fracture network geometry. Oneunique feature of these pulse injection experiments is that the entiretest cycle, both the initial pressure increase and subsequent pressurefall-off, is carefully monitored and used for the evaluation of the insitu hydromechanical behavior. Field test data are evaluated by plottingfracture normal displacement as a function of fluid pressure, measured atthe same borehole. The resulting normal displacement-versus-pressurecurves show a characteristic loop, in which the paths for loading(pressure increase) and unloading (pressure decrease) are different. Bymatching this characteristic loop behavior, the fracture normal stiffnessand an equivalent stiffness (Young's modulus) of the surrounding rockmass can be back-calculated. Evaluation of the field tests by couplednumerical hydromechanical modeling shows that initial fracture hydraulicaperture and normal stiffness vary by a …

Thiobacillus denitrificans is one of the few known obligate chemolithoautotrophic bacteria capable of energetically coupling thiosulfate oxidation to denitrification as well as aerobic respiration. As very little is known about the differential expression of genes associated with ke chemolithoautotrophic functions (such as sulfur-compound oxidation and CO2 fixation) under aerobic versus denitrifying conditions, we conducted whole-genome, cDNA microarray studies to explore this topic systematically. The microarrays identified 277 genes (approximately ten percent of the genome) as differentially expressed using Robust Multi-array Average statistical analysis and a 2-fold cutoff. Genes upregulated (ca. 6- to 150-fold) under aerobic conditions included a cluster of genes associated with iron acquisition (e.g., siderophore-related genes), a cluster of cytochrome cbb3 oxidase genes, cbbL and cbbS (encoding the large and small subunits of form I ribulose 1,5-bisphosphate carboxylase/oxygenase, or RubisCO), and multiple molecular chaperone genes. Genes upregulated (ca. 4- to 95-fold) under denitrifying conditions included nar, nir, and nor genes (associated respectively with nitrate reductase, nitrite reductase, and nitric oxide reductase, which catalyze successive steps of denitrification), cbbM (encoding form II RubisCO), and genes involved with sulfur-compound oxidation (including two physically separated but highly similar copies of sulfide:quinone oxidoreductase and of dsrC, associated with dissimilatory sulfite reductase). Among …

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.

Video footage from the KXAS-TV/NBC 5 television station in Fort Worth, Texas, covering a news story.