King Kong in the Bronx

Mexican American Studie

Supplementation of the Community Action Board of Santa Cruz County’s Commitment to Equity

The Community Action Board of Santa Cruz County, Inc. (CAB) is a non-profit organization that aids low-income clients with emergency, sustaining, and self-sufficiency services through their specialized program areas. Through a micro-level assessment of the County, research indicates a growing rate of poverty among marginalized communities, particularly in the Latinx population. Inequities relating to the low-wage occupational outlook in highly populated Latinx communities coupled with a high unemployment rate in Santa Cruz County only exacerbate the cyclical issue of poverty. Among marginalized community members who are most affected, they are also faced with housing insecurity and lack of health insurance. This project is centered around CAB’s commitment to equity. As service providers tasked with dismantling inequities with culturally grounded and relevant interventions to the diverse community, cultural competency is essential. The project implementation of an intern co-facilitated Equity Academy for staff along with an Equity Library shelved with literature recommendations from the community will help supplement staff\u27s knowledge of equity, social justice, and cultural competence when working with vulnerable populations in the County. Findings concluded positive participant feedback from the Equity Academy with new perspectives on the term “equity” and what it means for the community they serve. Recommendations for the future include: a continued facilitation of Equity Academy classes with an increased number of participants and adding additional literature and materials that relate to CAB’s core value of equity to their new library

Method to obtain nonuniformity information from field emission behavior

Copyright © 2010 American Vacuum Society / American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Vacuum Science and Technology Part B: Microelectronics and Nanometer Structures, 28(3), Article number 441 and may be found at http://scitation.aip.org/content/avs/journal/jvstb/28/3/10.1116/1.3327928.This article describes the characterization of field emission from a planar cathode to a spherical anode with the approach curve method (ACM). In such a diode configuration the electric field strength at the cathode surface is nonuniform. This nonuniformity gives an extra degree of freedom and it allows the interpretation of the current-voltage and voltage-distance (V×d) curves in terms of nonuniformity. The authors apply the ACM to Cu emitters to explain the nonlinearity of the V×d curve in ACM measurements. This analysis provides a good insight into field emission phenomena, supporting a method for nonuniformity characterization based on field emission behavior

Genetic evidence that cellulose synthase activity influences microtubule cortical array organization

To identify factors that influence cytoskeletal organization we screened for Arabidopsis ( Arabidopsis thaliana) mutants that show hypersensitivity to the microtubule destabilizing drug oryzalin. We cloned the genes corresponding to two of the 131 mutant lines obtained. The genes encoded mutant alleles of PROCUSTE1 and KORRIGAN, which both encode proteins that have previously been implicated in cellulose synthesis. Analysis of microtubules in the mutants revealed that both mutants have altered orientation of root cortical microtubules. Similarly, isoxaben, an inhibitor of cellulose synthesis, also altered the orientation of cortical microtubules while exogenous cellulose degradation did not. Thus, our results substantiate that proteins involved in cell wall biosynthesis influence cytoskeletal organization and indicate that this influence on cortical microtubule stability and orientation is correlated with cellulose synthesis rather than the integrity of the cell wall

Coal-fired power plant flue gas desulfurization wastewater treatment using constructed wetlands

Master of ScienceDepartment of Civil EngineeringNatalie MladenovIn the United States approximately 37% of the 4 trillion kWh of electricity is generated annually by combusting coal (USEPA, 2013). The abundance of coal, ease of storage, and transportation makes it affordable at a global scale (Ghose, 2009). However, the flue gas produced by combusting coal affects human health and the environment (USEPA, 2013). To comply with federal regulations coal-fired power plants have been implementing sulfur dioxide scrubbing systems such as flue gas desulfurization (FGD) systems (Alvarez-Ayuso et al., 2006). Although FGD systems have proven to reduce atmospheric emissions they create wastewater containing harmful pollutants. Constructed wetlands are increasingly being employed for the removal of these toxic trace elements from FGD wastewater. In this study the effectiveness of using a constructed wetland treatment system was explored as a possible remediation technology to treat FGD wastewater from a coal-fired power plant in Kansas. To simulate constructed wetlands, a continuous flow-through column experiment was conducted with undiluted FGD wastewater and surface sediment from a power plant in Kansas. To optimize the performance of a CWTS the following hypotheses were tested: 1) decreasing the flow rate improves the performance of the treatment wetlands due to an increase in reaction time, 2) the introduction of microbial cultures (inoculum) will increase the retention capacity of the columns since constructed wetlands improve water quality through biological process, 3) the introduction of a labile carbon source will improve the retention capacity of the columns since microorganisms require an electron donor to perform life functions such as cell maintenance and synthesis. Although the FGD wastewater collected possessed a negligible concentration of arsenic, the mobilization of arsenic has been observed in reducing sediments of wetland environments. Therefore, constructed wetlands may also represent an environment where the mobilization of arsenic is possible. This led us to test the following hypothesis: 4) Reducing environments will cause arsenic desorption and dissolution causing the mobilization of arsenic. As far as removal of the constituents of concern (arsenic, selenium, nitrate, and sulfate) in the column experiments, only sulfate removal increased as a result of decreasing the flow rate by half (1/2Q). In addition, sulfate-S exhibited greater removal as a result of adding organic carbon to the FGD solution when compared to the control (at 1/2Q). Moderate selenium removal was observed; over 60% of selenium in the influent was found to accumulate in the soil. By contrast, arsenic concentrations increased in the effluent of the 1/2Q columns, most likely by dissolution and release of sorbed arsenic. When compared to the control (at 1/2Q), arsenic dissolution decreased as a result of adding inoculum to the columns. Dissolved arsenic concentrations in the effluent of columns with FGD solution amended with organic carbon reached 168 mg/L. These results suggest that native Kansas soils placed in a constructed wetland configuration and amended with labile carbon do possess an environment where the mobilization of arsenic is possible

Página web sobre normas legales, de la empresa “Compras Públicas” y la percepción de los usuarios de Lima – 2021

El presente estudio se titula Página Web sobre normas legales, de la empresa “Compras Públicas” y la percepción de los usuarios de Lima – 2021. Donde se pretende como objetivo determinar la relación que existe entre la Página Web sobre normas legales, de la empresa “Compras Públicas” y la percepción de los usuarios de Lima – 2021. El tipo de investigación es aplicada, con enfoque cuantitativo y un diseño no experimental – transversal de carácter correlacional. La población es finita con un total de 220 trabajadores de las diferentes empresas de la ciudad de Lima; respecto a la muestra, se compone de 140 colaboradores seleccionados en el muestreo probabilístico de tipo aleatorio simple, en la cual se les aplicó la encuesta conformada por 18 ítems de escala tipo Likert. Los datos fueron registrados y procesados a través del programa IBM SPSS versión 25, logrando una confiabilidad muy alta de 0,880 en el Alfa de Cronbach. Los resultados señalan un valor de significancia de 0,004 > 0,05, alcanzando una correlación positiva alta de 0,748 aceptando la hipótesis de investigación y rechazando la nula. Como conclusión, se confirma que existe relación efectiva entre la Página Web y la percepción de los usuarios de Lima – 2021

Variability of rock mass support vs lengths of rockbolts

Bajo el postulado: “Universidad = Investigación”, el presente estudio está enfocado en determinar la capacidad de anclaje de los pernos de roca más utilizados en el Perú y la relación existente con su longitud. Inicialmente, se planteó llevar a cabo las pruebas en bloques de granito dentro del campus de la UNMSM, pero por no reflejar las condiciones reales, se realizaron en la mina Reliquias de la Cía. Minera Castrovirreyna (Huancavelica), en el mes de marzo del año en curso. Los pernos estudiados fueron: Split Set, Barras Helicoidales, Hydrabolt y Swellex, convenientemente acondicionados para tener anclajes efectivos de 1, 2, 3 y 4 pies. Los Split Sets y Barras Helicoidales, fueron cortados y entregados así, por PRODAC y Aceros Arequipa, respectivamente. Los pernos inflables Hydrabolt y Swellex donados por New Concept Mining y Atlas Copco, fueron entubados para que se expandan únicamente en las longitudes efectivas de anclaje establecidas. Los resultados de las 51 pruebas realizadas (11 Split Set, 17 Barras Helicoidales, 12 Hydrabolts y 11 Swellex), demuestran que la capacidad de anclaje de los pernos no guarda una relación lineal con sus longitudes, es decir, al duplicar la longitud de un perno, su capacidad de anclaje no necesariamente será el doble. Asimismo, La elongación de los pernos, tiende a guardar una relación lineal con la carga aplicada. Los pernos Split Set, Hydrabolt y Swellex muestran un anclaje uniforme al variar las longitudes efectivas de anclaje; mientras que el comportamiento de las Barras Helicoidales es irregular, sobre todo cuando se instalan con cemento. Los pernos de mayor y menor capacidad son respectivamente, los Hydrabolts y los Split Sets, así, para 2 pies de longitud efectiva de anclaje sus capacidades son 15,75 ton y 3,75 ton, respectivamente. Los pernos que muestran menor y mayor elongación son los Hydrabolts y los Split Sets, respectivamente. Asimismo, el costo por metro cuadrado sostenido del más bajo al más alto son respectivamente: Hydrabolt (10,95 $/ m2) y la barra Helicoidal con resina (50,67$/ m2), según análisis de costos al mes de Abril del 2011, y las condiciones y realidades encontradas en la mina Reliquias.This research is focused on establishing the load capacity of the rockbolts commonly used in Peru based on their length. Initially, we aimed to perform the pull tests on granite blocks at San Marcos University Campus, they were carried out under real operating mining conditions, at Reliquias, Castrovirreyna Mining Company (Huancavelica) during March of the current year. The rockbolts tested were: Split Set, Threaded Rebars, Hydrabolt and Swellex, which were suitably conditioned to have an effective anchorage of 1 to 4 feet. The Split Set and Threaded Rebars were cut and delivered as per our request by PRODAC and Aceros Arequipa, respectively. Both, Hydrabolt and Swellex rockbolts, supplied by New Concept Mining and Atlas Copco, were piped around to allow the anchorage of the established lengths only. Fifty one tests were carried (11 Split Set, 17 Threaded Rebars, 12 Hydrabolts and 11 Swellex), and the results showed that the load capacity of the rockbolts does not keep any linear relation with their length, that is to say, for example, when we duplicate the length of a rockbolt, its load capacity not necessarily will be doubled. The elongation of the bolts tends to keep a linear relation with the applied load. Split Set, Hydrabolt and Swellex rockbolts showed an uniform anchorage changing their lengths, whereas the Threaded Rebars showed an irregular anchorage, especially when they were installed with cement. The rockbolts of major and minor load capacity per length are the Hydrabolts and the Split Set, for a 2 feet bond length of anchorage their capacities were 15,75 ton and 3,75 ton, respectively. The bolt that showed less elongation was the Hydrabolt and the one with the greatest the Split Set. The Rockbolt of lowest cost for m2 supported was the Hydrabolt ($10,95/m2) and the one with the highest cost the Swellex ($50,67/m2), costs worked out for a 7 foot rockbolt, prices of April, 2011, and according to the operating conditions at Reliquias Mine

Identificación de factores para reducir accidentes por desprendimiento de rocas en minería subterránea

The objective of the present study is to identify factors to reduce accidents in mining or other underground excavations, caused by rockfall. To achieve this purpose, the fatal accidents that occurred from 2001 to 2011 were investigated in the prime sources, among others, MINEM, the Ministry of Labor and Employment Promotion and OSINERGMIN. From the information compiled and processed, the corresponding analysis was performed, thus identifying the following factors: a) Type of rock. 87% of fatal accidents occurred in type III and IV rocks. b) Type of support. 45.8% of fatal accidents occurred in unsupported areas and in areas sustained with wood, Split Set and Helical Bars occurred 45.85%. c) Type of work. 59% of fatal accidents occurred in hacking. d) Occupation. 53% of fatal accidents suffered drilling master and / or assistants. e) Work shift. 58% of fatal accidents occurred in day shifts. f) Hours of the day. 41.4% of fatal accidents occurred between 9: 00-12: 00 and 15: 00-18: 00. g) Service time. 54.3% of fatal accidents suffered workers with less than one year of service.El objetivo del presente estudio es identificar factores para reducir accidentes en las labores mineras u otras excavaciones subterráneas, ocasionados por desprendimiento de rocas. Para alcanzar tal propósito, se investigó los accidentes mortales ocurridos de 2001 a 2011, en las fuentes primigenias, entre otras, MINEM, Ministerio de Trabajo y Promoción del Empleo y OSINERGMIN. A partir de la información compilada y procesada, se realizó el análisis correspondiente, así se identificaron los siguientes Factores a) Tipo de roca. El 87 % de accidentes mortales se produjeron en rocas tipo III y IV. b) Tipo de sostenimiento. El 45,8 % de los accidentes mortales se produjeron en áreas no sostenidas y en áreas sostenidas con madera, Split Set y Barras Helicoidales se produjeron el 45,85 %. c) Tipo de labor. El 59 % de los accidentes mortales se produjeron en los tajeos. d) Ocupación. El 53 % de los accidentes mortales sufrieron maestros perforistas y/o ayudantes. e) Turno de trabajo. El 58 % de accidentes mortales ocurrieron en turnos de día. f) Horas del día. El 41,4 % de accidentes mortales se produjeron entre las 9:00-12:00 horas y 15:00-18:00 horas. g) Tiempo de servicio. El 54,3 % de accidentes mortales sufrieron trabajadores con menos de un año de servicio

Estudo de tochas de plasma através da teoria da similaridade

Orientador: Aruy MarottaDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb WataghinResumo: Nesta tese foram obtidas equações generalizadas para a característica tensão-corrente de umatocha de plasma de arco não transferido e de uma tocha de plasma de arco transferido, utilizando o método da Teoria da Similaridade. Para a tocha de arco não transferido, os dados experimentais foram obtidos para ar como gás plasmagênico e na faixa de correntes de 10 a 295 A. Para a tocha de arco transferido, os dados foram obtidos para argônio e faixa de correntes de 300 a 1500 A. A tocha de arco não transferido apresentou característica estática tensão-corrente descendente, enquanto a de arco transferido, a característica obtida foi dinâmica, com comportamento fortemente anômalo, com a presença de histerese, além de possuir ambos os ramos, o descendente e o ascendente. Os testes da tocha de arco transferido foram feitos num forno com paredes refratárias em atmosfera de argônio. Foram obtidas equações generalizadas tendo um, dois e três parâmetros adimensionais independentes, sendo a escolha da melhor equação generalizada baseada no coeficiente de correlação da regressão multilinear. O parâmetro adimensional da voltagem foi considerado como o parâmetro dependente. Em geral, para os parâmetros adimensionais independentes foram utilizados aqueles relacionados com as diversas modalidades de transferência da energia Joule do arco para outras modalidades de energia. Estas foram a convectiva, a radiativa, a turbulenta e a condutiva. As equações generalizadas obtidas para a tocha de arco não transferido apresentaram boa concordância para toda a faixa de dados experimentais. Já as equações para a tocha de arco transferido, devido à grande anomalia observada, foram limitadas à apenas a parte ascendente dos dados experimentais. O estudo experimental, realizado nesta tese pode contribuir para uma melhor compreensão dos fenômenos que ocorrem em tochas de plasma, como também, fornecer uma guia para a engenharia de projeto das tochasAbstract: In this thesis, generalized equations for the voltage-current characteristics have been obtained for a non transferred arc plasma torch and for a transferred arc plasma torch, using the method of the Theory of the Similarity. For the non transferred arc plasma torch, the experimental data was obtained for air as the plasmagenic gas and for currents of 10 to 295 A. For the transferred arc torch, the experiments were carried out for argon and currents of 300 to 1500 A. The non transferred plasma torch showed a descending voltage-current static characteristic, while the transferred plasma torch, the characteristic was dynamic, with strong anomalous behavior, consisting of the presence of hysteresis, besides possessing both the branches, the descendant and the ascendant. The tests of the transferred torch were carried out in an oven with refractory walls in argon atmosphere. Generalized equations had been obtained having one, two and three independent nondimensional parameters, being the choice of the best generalized equation based in the coefficient of correlation of the multilinear regression. The dimensionless parameter of the voltage was considered as the dependent parameter. In general, for the independent nondimensional parameters have been used those related with the diverse modalities of transference of the Joule energy of the arc to other modalities of energy. These had been the convective one, the radiative, the turbulent and the conductive one. The generalized equations obtained for the non transferred torch showed good agreement for all the range of experimental data. However, the equations for the transferred arc torch, due to their great observed anomaly, had been limited only to the ascending part of the experimental data. The experimental study, carried out in this thesis, might contribute to a better understanding of the phenomena taking place in plasma torches, as well, to provide a guide for their engineeringMestradoFísicaMestre em Físic

Optimum formulation of aluminized anfo for blatings in underground mining

La perforación y voladura en una operación minera o civil, es esencial, puesto que de ello depende la eficiencia de las operaciones subsiguientes. Sin embargo, las voladuras también tienen efectos negativos, que pueden minimizarse, seleccionando explosivos de acuerdo al tipo de terreno. El explosivo más usado actualmente, es el ANFO, cuya potencia puede regularse, adicionando aluminio en distintos porcentajes en función del tipo de terreno (según la clasificación Bieniawski o Barton). Para materializar este estudio, se hicieron pruebas de voladura en la Mina Condestable, con ANFO aluminizado hasta el 6% de aluminio en polvo, cargando los taladros con aire comprimido a 80 PSI de presión y cebando con emulsión encartuchada. Bajo estas condiciones, se determinaron las concentraciones lineales de carga y la carga total por taladro. Del análisis de 20 parámetros, se concluye que la formulación óptima del ANFO aluminizado para las voladuras primarias en los tajeos A, B1, B2 Y C de Condestable es el ANFO aluminizado al 4 %, donde los tipos de terreno son de clase II y III-II. Asimismo, se determina que el porcentaje de aluminio adicionado al ANFO guarda una relación directa con el tipo de roca.Drilling and blasting in a mining operation is essential, since the efficiency of subsequent operations depends on it. However, blasting also has negative effects, which can be minimized by selecting explosives according to the rock type. The most commonly used explosive is the ANFO, whose power can be regulated, adding aluminum in different percentages depending on the rock type (according to Bieniawski or Barton classification). To carry out this study, blasting tests were carried out in the Condestable Mine, with ANFO aluminized up to 6% of powdered aluminum, carrying out the loading of drills with compressed air at 80 PSI of pressure and priming with cartridge emulsion, under these conditions, linear charge concentrations and total charge per hole were determined. From the analysis of 20 parameters, it is concluded that the optimal formulation of aluminized ANFO for primary blasting in A, B1, B2 and C stopes in Condestable is 4% aluminized ANFO, where the rock types are class II and III- II. In addition, it is determined that the percentage of aluminum added to ANFO is directly related to the type of rock