Search results for " c.c."

Maintenance of genetic diversity in cyclic populations - a longitudinal analysis in Myodes glareolus

2012

Conspicuous cyclic changes in population density characterize many populations of small northern rodents. The extreme crashes in individual number are expected to reduce the amount of genetic variation within a population during the crash phases of the population cycle. By long-term monitoring of a bank vole (Myodes glareolus) population we show that despite the substantial and repetitive crashes in the population size, high heterozygosity is maintained throughout the population cycle. The striking population density fluctuation in fact only slightly reduced the allelic richness of the population during the crash phases. Effective population sizes of vole populations remained also relativel…

Consequential life cycle assessment of the Italian power system

2022

Energy production and consumption contribute to 76% of the European greenhouse gas (GHG) emissions in 2018, and 90% of global GHG emissions with land use, land use change and forestation (LULUCF) in the same year. By applying energy efficiency (EE) and renewable energy (RE) technologies, the GHG emission intensity of the energy sector reduced by 1.3% in 2018 compared to the previous year. The current climate change policy aims at decarbonization, sustainable environment, economic prosperity and social equity. It requires the deep decarbonisation of the economies, meaning that the energy and power systems as well as other emission intensive sectors need to transform into zero-emission ones. …

Comparison of Post-Weld Treatment of High-Strength Steel Welded Joints in Medium Cycle Fatigue

2010

This paper presents a comparison of three post-weld treatments for fatigue life improvement of welded joints. The objective is to determine the most suitable post-weld treatment for implementation in mass production of certain crane components manufactured from very high-strength steel. The processes investigated are: burr grinding, TIG dressing and ultrasonic impact treatment. The focus of this investigation is on the so-called medium cycle area, i.e. 10 000-500 000 cycles and very high stress ranges. In this area of fatigue design, the use of very high strength steel becomes necessary, since the stress range can exceed the yield-strength of ordinary structural steel, especially when consi…

Cosa sono i rifiuti?

2008

Renovación pedagógica en el primer ciclo de educación infantil. Un estudio de caso.

2015

La presente investigación de tesis doctoral pretende, por medio de una mirada fenomenológica- hermenéutica, acceder a la comprensión profunda de la vida cotidiana de una escuela infantil de primer ciclo (0-3 años), mediante el estudio de caso de una escuela pública ubicada en una localidad cercana a la ciudad de Valencia. La inmersión en el campo, nos ha permitido evidenciar cuáles pueden ser las claves, las estrategias o las propuestas de renovación pedagógica en este momento evolutivo tan significativo para los niños y las niñas. Estas evidencias, nos han permitido construir un Informe Narrativo-Interpretativo, como columna vertebral de la investigación. El relato de una experiencia de lo…

Maintenance of genetic diversity in cyclic populations—a longitudinal analysis in Myodes glareolus

2012

Conspicuous cyclic changes in population density characterize many populations of small northern rodents. The extreme crashes in individual number are expected to reduce the amount of genetic variation within a population during the crash phases of the population cycle. By long-term monitoring of a bank vole (Myodes glareolus) population, we show that despite the substantial and repetitive crashes in the population size, high heterozygosity is maintained throughout the population cycle. The striking population density fluctuation in fact only slightly reduced the allelic richness of the population during the crash phases. Effective population sizes of vole populations remained also relative…

The New Nino Capability Index for Dynamic Process Capability Analysis

2015

The process capability analysis is a crucial activity to evaluate if the process outcome meets the design specifications. Classically, such analysis is performed by verifying the in-control condition of the process and evaluating suitable capability indices, by assuming the process in-control steady-state condition. However, the in-control period of the process characterizes only a part of the system functioning cycle, the one with the lower defective rate. In particular, the system functioning cycle is also characterized by the out-of-control period, during which a greater defective rate is produced, and such increasing is not considered by the widely adopted capability indices. As consequ…

Cybernetics of Value Cocreation for Product Development

2017

In marketing theory, the shift from the paradigm of value creation to value ‘cocreation’ calls for a deeper grasp of the interactions between producers and customers. Marketing studies have widely focused on the value cocreation concept, but so far, the mechanism through which consumers can be involved in the process of value cocreation through product development had found little space in marketing studies. In this theoretical paper, we aim to fill this gap and pave the way towards a better understanding of the mechanisms of value cocreation for product development through second-order cybernetics. We conceive the market arena as a physical or virtual place where communications of value pro…

Evaluation of Clutch Plate Integrity with Non-Destructive Methods

2009

Abstract Nondestructive evaluation (NDE) represents an important phase in the life cycle of a product to detect defects both in service and in production. NDE techniques most commonly used to detect surface defects are visual inspection and methods based on eddy current and ultrasound. Laser and non-contact sensors have been recently used to inspect ultrasonically without contact. Components with complex geometry are usually inspected combining several NDE techniques, or simply visually where analysis and evaluation of results are performed by an operator based on specific parameters of acceptance. This last method is currently used to inspect the clutch plates since their complex geometry,…

La enseñanza de la historia desde la perspectiva del profesorado de bachillerato

2007

Resumen tomado de la publicación Analiza la labor en el aula de cinco profesores que imparten la asignatura de historia de segundo de bachillerato. El perfil profesional actual de estos docentes es producto de un proceso evolutivo en el que han intervenido la formación historiográfica y didáctica, las rutinas escolares, las diferentes reformas educativas y los cambios en la concepción profesional del profesor de secundaria. El resultado ha sido un sistema de enseñanza aprendizaje que contiene diversas contradicciones en torno a la finalidad educativa de la historia. Por otra parte, el bachillerato como etapa intermedia entre la secundaria obligatoria y los estudios superiores añade un nuevo…