The uses of Connes and Kreimer's algebraic formulation of renormalization theory

We show how, modulo the distinction between the antipode and the "twisted" or "renormalized" antipode, Connes and Kreimer's algebraic paradigm trivializes the proofs of equivalence of the (corrected) Dyson-Salam, Bogoliubov-Parasiuk-Hepp and Zimmermann procedures for renormalizing Feynman amplitudes. We discuss the outlook for a parallel simplification of computations in quantum field theory, stemming from the same algebraic approach.Comment: 15 pages, Latex. Minor changes, typos fixed, 2 references adde

Assessing the effect of indoor residual spraying (IRS) on malaria morbidity in Northern Uganda: a before and after study

BACKGROUND : Indoor residual spraying (IRS) is known to reduce malaria transmission. In northern Uganda, a high endemic area, IRS has been implemented since 2006. Limited data however, exists on the effect of IRS on the malaria burden. This study sought to assess the effect of IRS on malaria morbidity in the high intensity area of northern Uganda. Retrospective routine data from ten health facilities in three districts which had received at least five rounds of IRS in northern Uganda was analysed. The primary outcome of interest was malaria morbidity, measured by the slide positivity rate (SPR). Descriptive statistics were used to describe the malaria morbidity stratified by age and sex. The average change in the malaria morbidity, measured by the SPR was assessed according to time, measured as calendar months. A fixed-effects linear regression model was used which included a polynomial function of time and controlled for malaria seasonality and variations between districts/facilities. RESULTS : The total out-patient department attendance in the ten health facilities for the study period was 2,779,246, of which 736,034 (26.5%) malaria cases were diagnosed with 374,826 (50.9%) cases of under 5 years and an overall SPR of 37.5%. The percentage point (p.p.) changes in SPR according to time measured as calendar months following IRS, revealed a decreasing trend in malaria morbidity in the first 3 months following each round of IRS. The highest percentage point decrease in the SPR was observed in the second month following IRS (9.5 p.p., CI −17.85 to −1.16, p = 0.026), among patients above 5 years. The SPR decline however waned by the fourth month following IRS, with an increase in the SPR of 8.4 p.p. at district level by the sixth month, p = 0.510. CONCLUSION : The study results show that IRS was associated with a significant reduction in malaria morbidity in northern Uganda in the first 3 months following IRS. The malaria reduction however waned by the fourth month following IRS.Additional file 1. Details of indoor residual spraying rounds.Measure Evaluation under the post graduate programme at the University of Pretoria.http://www.malariajournal.comam2017School of Health Systems and Public Health (SHSPH

Párrocos, agentes fiscales y comunidades andinas: conflictos e imaginarios (Tarapacá, Norte de Chile 1893-1914)

This article deals with one of the less studied aspects of the chilenization processes carried out in Tarapacá between the 1880 and 1920 decades: the role of priests in the Andean space and articulation dynamics and conflicts with state agents and indigenous peoples. Specifically, based on documents taken from the Bishopric Archive of Iquique, the viewpoint that the priests had about the Andean population and the difficulties they encountered in their pastoral work aimed at the socialization of the Chilean is analyzed.En este artículo se aborda uno de los aspectos menos estudiados del proceso de chilenización llevado a cabo en Tarapacá entre las décadas de 1880 y 1920: el rol de los curas en el espacio andino y las dinámicas de articulación y conflicto con los agentes fiscales y las poblaciones indígenas. Puntualmente, usando como base documentación del Archivo del Obispado de Iquique, se analiza la mirada que tuvieron los sacerdotes sobre la población andina y las dificultades que enfrentaron en su labor pastoral orientada a la socialización de lo chileno

Estudio de la prefactibilidad en la importación y comercialización en Chile de productos de cuidado personal marca Pacinos

Tesis (Ingeniero Industrial)Hoy en día los hombres están más preocupados por su apariencia personal que hace 10 años atrás, esto ha quedado demostrado con el crecimiento del 12,5% que tuvo la venta de productos de belleza y cuidado personal para hombres durante el año 2016, además, se espera que crezca un 14,9% para el 2020. Por otro lado, ya en el año 2013 los hombres representaban el 28,7% de las ventas de productos cosméticos en farmacias. En comparación al resto de Latinoamérica, el mercado masculino chileno es el que más gasta en de productos de cuidado personal, superando a Brasil y Argentina, agregando a esto, el mayor poder económico que existe en el país y la continua alza en la demanda de productos belleza y cuidado corporal de líneas premium. En Chile, el mercado de productos profesionales para el cabello para hombres está en su mayoría representado por las marcas Redken y American Crew, es la poca variedad de marcas y las cifras presentadas lo que da la importancia a evaluar este proyecto y examinar la posibilidad de una oportunidad de negocio

Estratégias de atração e retenção do talento humano na indústria mineira colombiana

In this bibliographic revision, some factors that may be crucial for organizations in the mining sector to attract or retain qualified personnel for a particular charge were analyzed. It was performed in three stages: consultation on secondary sources, analysis of factors that occur in the company as catalysts of talent retention and article writing. It was found that the main retention strategies in the mining sector entities in Colombia are essentially based on monetary compensation type, supplemented with others grounded in merit awards and the establishment of conditions of wellness. They prioritize the selection of native personnel in their area of influence. Increased mobility occurs among people who come from the most remote to these regions. It is not evident the existence of specific career plans that define the procedure to update the map of charges, adjusted to the profiles of professionals, and the requirements of the organizational structure of the company.En este trabajo de revisión bibliográfica se analizan algunos factores que pueden resultar determinantes para las organizaciones del sector minero a la hora de atraer o retener el personal idóneo para determinado cargo. Se realizó en tres etapas: consulta de fuentes secundarias, análisis de los factores que se dan en la empresa como agentes catalizadores de la retención de talentos y redacción del artículo. Se encontró que las principales estrategias de retención de las entidades del sector minero en Colombia, se basan en compensaciones esencialmente de tipo monetario, complementadas con otras fundamentadas en reconocimientos por méritos y el establecimiento de condiciones de bienestar integral. Priorizan la selección de personal oriundo de su área de influencia. La mayor movilidad se presenta entre personas que provienen de las regiones más alejadas a éstas. No es evidente laexistencia de planes de carrera concretos que definan el procedimiento a seguir para actualizar el mapa de cargos, ajustado a los perfiles de los profesionales, y a los requerimientos de la estructura organizacional de la empresa