Geologic Controls on Nitrogen Isotopes in Marine Black Shale: a Case Study of the Woodford Shale, Anadarko Basin, Oklahoma

Determining depositional environments of organic-rich black shale can enhance the identification of hydrocarbon producing intervals. Several methods have been utilized to identify depositional environments; however, for this study an isotopic approach was used. Bulk sedimentary δ15N signals have been used to identify water column redox states of sediments, but affects of thermal maturity on δ15N are unknown. Understanding the thermal maturity alterations on bulk sedimentary δ15N is relevant to identifying target intervals for ultimate hydrocarbon recovery. In attempt to understand the depositional, diagenetic, and thermal maturation affects on the bulk sedimentary δ15N signals, we sampled the Devonian-age Woodford Shale at different depths from the depocenter of the Anadarko Basin to an outcrop east of the Anadarko Shelf in the Ozark Plateau to test different thermal maturity levels. The Ro maturity levels of the Woodford Shale at the sample locations ranged from 0.56 % to 1.43 %, which cover oil generation to gas generation. The results indicate that the δ15N values of the Woodford Shale produce two different populations. One population has an average δ15N value that is 3.4 ‰ heavier than the average δ15N value of the other population. On an individual location and basin wide scale, deeper sediments are isotopically lighter than shallower sediments in terms of nitrogen, and these deeper sediments are more thermally mature. Data suggests high concentrations of redox sensitive trace metals, uranium (U) and molybdenum (Mo), are associated with the population of low bulk sedimentary δ15N values, while low concentrations of U and Mo and the presence of burrows are associated with the population of high bulk sedimentary δ15N values. The observed relationship between bulk sedimentary δ15N and Ro is opposite than that expected to be seen by nitrogen isotopes affected by thermal maturity. On the other hand, the observed relationship between bulk sedimentary δ15N and trace metal concentrations indicates that bulk sedimentary δ15N values are strongly influenced by the redox state of the water column during deposition. This relationship was observed on both an individual scale and basin wide scale, which suggests redox water column conditions changed during Woodford deposition and were locally dependent.Geolog

Impact of parameter variations on circuits and microarchitecture

Parameter variations, which are increasing along with advances in process technologies, affect both timing and power. Variability must be considered at both the circuit and microarchitectural design levels to keep pace with performance scaling and to keep power consumption within reasonable limits. This article presents an overview of the main sources of variability and surveys variation-tolerant circuit and microarchitectural approaches.Peer ReviewedPostprint (published version

Estrategias de marketing relacional y la gestión de la experiencia del cliente del centro de idiomas de una universidad del norte del país, año 2019

El presente trabajo de investigación tuvo como objetivo general determinar el impacto de las estrategias de marketing relacional en la gestión de la experiencia del cliente del Centro de Idiomas de una universidad del norte del país, año 2019; cuya unidad de estudio se desarrolla con una muestra comprendida por 355 estudiantes. La investigación es de tipo aplicada, desarrollado bajo un diseño no experimental, transversal y correlacional; así mismo se utilizó una técnica estadística no paramétrica para la contrastación de hipótesis a través de la prueba de Rho de Spearman. Habiéndose usado un cuestionario de 35 preguntas en base al desarrollo de dimensiones para cada variable, luego se procedió con el procesamiento de los datos, análisis e interpretación de los resultados, llegando a la siguiente conclusión: El marketing relacional tiene relación altamente significativa con la gestión de la experiencia del cliente (sig. es 0,000 < 0.05); así también el coeficiente Rho de Spearman, 0.63, determinó que la correlación es alta positiva entre las variables, es decir, se determinó que a mejor marketing relacional mejor será la gestión de la experiencia del cliente cumpliéndose la hipótesis planteada.The present research work had as general objective to determine the impact of relationship marketing strategies in the management of the customer experience of the Language Center of a university in the north of the country, year 2019; whose unit of study is developed with a sample comprised of 355 students. The research is of an applied type, developed under a non-experimental, cross-sectional and correlational design; Likewise, a non-parametric statistical technique was used for hypothesis testing through Spearman's Rho test. Having used a questionnaire of 35 questions based on the development of dimensions for each variable, then the data processing, analysis and interpretation of the results were proceeded, reaching the following conclusion: Relationship marketing has a highly significant relationship with management customer experience (sig. is 0.000 <0.05); Likewise, Spearman's Rho coefficient, 0.63, determined that the correlation is high positive between the variables, that is, it was determined that the better relationship marketing, the better the customer experience management, fulfilling the hypothesis

Heat Attenuation and Nutrient Delivery by Localized Upwelling Avoided Coral Bleaching Mortality in Northern Galapagos During 2015/2016 ENSO

Despite a very strong El Niño Southern Oscillation in 2015/2016, no coral mortality associated with bleaching was observed at the northern Galapagos (Ecuador) Islands of Darwin and Wolf. From March 2016 to March 2018, coral cover and health as well as water chemistry (NO3− and PO43−) and temperature were recorded. A marked heat anomaly reached 30 °C at Wolf in February 2016, but peak temperatures were attenuated after 2 d by a 4 °C drop. Temperature patterns at three depths (10, 15, and 20 m) and a subsequent and persistent phytoplankton bloom suggest topographically driven upwelling as the source of colder water and dissolved inorganic nutrients—both of which helped corals endure the heating episode. Consequently, no mortality and only partial bleaching were recorded in March 2016. Partially bleached corals contained numerous healthy zooxanthellae in deeper tissue layers. A continuous temperature record from 2012 to 2014 suggests that such upwelling events are common, inducing temperature fluctuations of up to 6 °C within 24 h during the observation period. Events at Wolf in 2016 suggest local upwelling reduced coral stress by relieving heat and by delivering nutrients required by corals to retain their regular temperature tolerance

Some Environmental and Biological Determinants of Coral Richness, Resilience and Reef Building in Galápagos (Ecuador)

Throughout the Galápagos, differences in coral reef development and coral population dynamics were evaluated by monitoring populations from 2000–2019, and environmental parameters (sea temperatures, pH, NO3−, PO43−) from 2015–19. The chief goal was to explain apparent coral community differences between the northern (Darwin and Wolf) and southern (Sta. Cruz, Fernandina, San Cristóbal, Española, Isabela) islands. Site coral species richness was highest at Darwin and Wolf. In the three most common coral taxa, a declining North (N)-South (S) trend in colony sizes existed for Porites lobata and Pocillopora spp., but not for Pavona spp. Frequent coral recruitment was observed in all areas. Algal competition was highest at Darwin, but competition by bioeroding sea urchins and burrowing fauna (polychaete worms, bivalve mollusks) increased from N to S with declining coral skeletal density. A biophysical model suggested strong connectivity among southern islands with weaker connectivity to Wolf and even less to Darwin. Also, strong connectivity was observed between Darwin and Wolf, but from there only intermittently to the south. From prevailing ocean current trajectories, coral larvae from Darwin and Wolf drift primarily towards Malpelo and Cocos Islands, some reaching Costa Rica and Colombia. Mean temperature, pH, and PO43− declined from N to S. Strong thermocline shoaling, especially in the warm season, was observed at most sites. A single environmental factor could not explain the variability in observed coral community characteristics, with minimum temperature, pH and nutrient levels the strongest determinants. Thus, complex environmental determinants combined with larval connectivity patterns may explain why the northern Galápagos Islands (Darwin, Wolf) have higher coral richness and cover and also recover more rapidly than central/southern islands after region-wide disturbances. These northern islands are therefore potentially of critical conservation importance as important reservoirs of regional coral biodiversity and source of larvae

Some Environmental and Biological Determinants of Coral Richness, Resilience and Reef Building in Galápagos (Ecuador)

Throughout the Galápagos, differences in coral reef development and coral population dynamics were evaluated by monitoring populations from 2000–2019, and environmental parameters (sea temperatures, pH, NO3−, PO43−) from 2015–19. The chief goal was to explain apparent coral community differences between the northern (Darwin and Wolf) and southern (Sta. Cruz, Fernandina, San Cristóbal, Española, Isabela) islands. Site coral species richness was highest at Darwin and Wolf. In the three most common coral taxa, a declining North (N)-South (S) trend in colony sizes existed for Porites lobata and Pocillopora spp., but not for Pavona spp. Frequent coral recruitment was observed in all areas. Algal competition was highest at Darwin, but competition by bioeroding sea urchins and burrowing fauna (polychaete worms, bivalve mollusks) increased from N to S with declining coral skeletal density. A biophysical model suggested strong connectivity among southern islands with weaker connectivity to Wolf and even less to Darwin. Also, strong connectivity was observed between Darwin and Wolf, but from there only intermittently to the south. From prevailing ocean current trajectories, coral larvae from Darwin and Wolf drift primarily towards Malpelo and Cocos Islands, some reaching Costa Rica and Colombia. Mean temperature, pH, and PO43− declined from N to S. Strong thermocline shoaling, especially in the warm season, was observed at most sites. A single environmental factor could not explain the variability in observed coral community characteristics, with minimum temperature, pH and nutrient levels the strongest determinants. Thus, complex environmental determinants combined with larval connectivity patterns may explain why the northern Galápagos Islands (Darwin, Wolf) have higher coral richness and cover and also recover more rapidly than central/southern islands after region-wide disturbances. These northern islands are therefore potentially of critical conservation importance as important reservoirs of regional coral biodiversity and source of larvae

The Grizzly, October 25, 2012

UCARE Directs Week of Local Service • UC Gears up for Homecoming • Report on Grads\u27 Successes • Grizzly Gala: Food, Drinks and Music • Teach for America • Homecoming Nominations • Headphone Disco • Opinion: Ursinus Sports Teams Need More Support; Varsity Teams and Athletes Overvalued at Ursinus • Ursinus Finalizes New Athletics Logo • Senior Spotlight: Kristin Hanratty, UC Volleyball • Homecoming Special for Class of \u2713https://digitalcommons.ursinus.edu/grizzlynews/1867/thumbnail.jp

The Grizzly, January 31, 2013

Admissions Updates • Professor to Give Blackface Talk • Senior Gift Committee Seeks Annual Fund Donations • Lower Lunch Schedule Changes • UC Sustainability • Students Make Alternate Majors • UC Welcomes Beaman • Study Abroad Tips and Advice for UC Students • Opinion: Take Advantage of the Study Abroad Program; Students Should be Better Informed About Parking • Wrestling Pushes Forward for Success • Lofty Goals Set for UC Gymnasticshttps://digitalcommons.ursinus.edu/grizzlynews/1873/thumbnail.jp

The Grizzly, October 11, 2012

Students Debate Alcohol Rules • UC Conservatives Feel Outnumbered • UC Celebrates LGBT History • Art, Music Festival • Literary Society Welcomes Student Writers • No Bells Ever Resided in Bomberger Bell Tower • R.D. Brooks Karns is a 2nd Lt. in the National Guard • UCTV Returns to Campus After 3-Year Absence • Opinion: We Must Inform Ourselves on Syria; Romney, a Stronger Candidate After Debate • UC Athletics Struggle Throughout Week • Senior Spotlight: Leah Shaw, Soccer • Sports Spotlight: Bryan Ellis, Footballhttps://digitalcommons.ursinus.edu/grizzlynews/1866/thumbnail.jp

The Grizzly, September 20, 2012

USGA Elections • WeCAN\u27s Wismer Plans • Yard Sale Saturday • Textbook Prices a Problem • Late Night Lower Back • SUN and UC Dems Hold Political Talk • Accessible Art in the Berman • New Chalk Rules • Opinion: Don\u27t Rely on Social Media This Election Year; Paralympics Deserve More Coverage • Up-and-Down Week for UC Athletics • Cross Country Team Hopes the Kids are All Right • Senior Spotlight: Catherine Bitterlyhttps://digitalcommons.ursinus.edu/grizzlynews/1863/thumbnail.jp