Production management model through MPS and line balancing to reduce the non-fulfillment of orders in lingerie clothing MSEs in Peru

The focus of this research is to establish control and planning management in the sewing production process of lingerie clothing to better prepare companies for demand growth. The lack of improvement tools in this sector, the lack of staff training and a lack of quality culture has led to companies, especially MYPES, not being able to meet the established delivery times and non-fulfillment of orders with the customers, which represents 80% of dissatisfied orders due to the limited production capacity and non-productive time in the plant. This problem is due to limited production capacity, deficient production planning, and lack of materials. In order to solve this problem, industrial engineering tools were used. The application of these tools improved production from 79% to 95%

Fluid Structure Interaction Analysis of Wind Turbine Rotor Blades Considering Different Temperatures and Rotation Velocities

Wind energy is the clean energy source that has had the highest installation growth worldwide. This energy uses the kinetic energy in the airflow currents to transform it into electrical energy through wind turbines. In this chapter, a rotor of a 2 MW of power wind turbine installed in Mexico is analyzed considering the wind velocity data and temperatures at each season of the year on the zone for the analysis in Computational Fluid Dynamics (CFD); subsequently, a Fluid–Structure Interaction (FSI) analysis was carried out to know the stress of the blades. The results show a relationship between temperature, air density, and power

The Discrepancy Between tau and e+e- Spectral Functions Revisited and the Consequences for the Muon Magnetic Anomaly

We revisit the procedure for comparing the pi pi spectral function measured in tau decays to that obtained in e+e- annihilation. We re-examine the isospin-breaking corrections using new experimental and theoretical input, and find improved agreement between the tau- --> pi- pi0 nu_tau branching fraction measurement and its prediction using the isospin-breaking-corrected e+e- --> pi+pi- spectral function, though not resolving all discrepancies. We recompute the lowest order hadronic contributions to the muon g-2 using e+e- and tau data with the new corrections, and find a reduced difference between the two evaluations. The new tau-based estimate of the muon magnetic anomaly is found to be 1.9 standard deviations lower than the direct measurement.Comment: 10 pages, 6 figures, submitted to Eur. Phys. J. C; (v2): Revised version with improved and uniform treatment of tau and e+e- data with HVPTools and a few minor bug fixes; (v3): Final version accepted for publicatio

Photoelectrical reading in ZnO/Si NCs/p-Si resistive switching devices

The increasing need for efficient memories with integrated functionalities in a single device has led the electronics community to investigate and develop different materials for resistive switching (RS) applications. Among these materials, the well-known Si nanocrystals (NCs) have demonstrated to exhibit RS properties, which add to the wealth of phenomena that have been studied on this model material platform. In this work, we present ZnO/Si NCs/p-Si resistive switching devices whose resistance state can be electrically read at 0 V under the application of low-power monochromatic illumination. The presented effect is studied in terms of the inner structural processes and electronic physics of the device. In particular, the creation of conductive filaments through the Si NC multilayers induces a low-resistance path for photogenerated carriers to get extracted from the device, whereas in the pristine state charge extraction is strongly quenched due to the insulating nature of the NC-embedding SiO2 matrix. In addition, spectral inspection of the generated photocurrent allowed unveiling the role of Si NCs in the reported effect. Overall, the hereby shown results pave the way to obtain memories whose RS state can be read under low-power conditions

Variación del color de macroalga Lessonia trabeculata deshidratada con secador de rayos infrarrojos

Fishmeal concentrates a high percentage of protein and its monetary cost is relatively high, searching for possible alternatives in macroalgae for improvement purposes is an option. Color is a fundamental characteristic of food, however, drying by the Infrared method as an emerging technology for the study of the macroalga Lessonia trabeculata is little studied. For this reason, the degradation and change of color in the drying process by infrared rays (IR) at different temperatures 40°C, 55°C and 70°C were objectively characterized with the color space scale (CIE-L*a *b*), through the use of a spectrophotometer. Drying was carried out with infrared rays in an infrared radiant heating chamber with a power of 4.5kW, 20.5 Amps. The results indicate that the best color treatment determined was for the macroalga Lessonia trabeculata at a temperature of 40°C with values ​​for: L*= 44.758±0.227, a*= -1.564 ± 0.016 and b*= 11.050±0.017; obtaining a first order kinetics for logarithmic scale corresponding to the parameters L*.b* as a function of time, likewise an activation energy value of Ea = 24.062 KJ/mol and the Arrhenius constant k0 = 0.0197 min- was reached. one. It is concluded that there is inverse variability between the color of the macroalgae and the temperature applied in the drying process; being the values ​​of the color parameters L*, a*, b* of the macroalga decreases as the temperature increases, thereby leading to color degradation.La harina de pescado concentra alto porcentaje de proteínas y su costo monetario es relativamente alto, buscar posibles alternativas en las macroalgas con propósitos de mejora es una opción. El color es una característica primordial de los alimentos, sin embargo, el secado por el método Infrarrojo como tecnología emergente para el estudio de la macroalga Lessonia trabeculata es poco estudiado. Por ello, se caracterizó objetivamente la degradación y cambio del color en el proceso de secado por rayos infrarrojos (IR) a diferentes temperaturas 40°C, 55°C y 70°C con la escala de espacio de color (CIE-L*a*b*), a través del uso de un espectrofotómetro. Se procedió a secar con rayos infrarrojos en una cámara de calentamiento radiante infrarrojo de potencia 4.5kW, 20.5 Amperios. Los resultados indican que el mejor tratamiento de color determinado fue para la macroalga Lessonia trabeculata a una temperatura de 40°C con valores para: L*= 44,758±0,227, a*= -1.564 ± 0,016 y b* = 11,050±0,017; obteniendo una cinética de primer orden para escala logarítmica correspondiente a los parámetros L*.b* en función al tiempo, asimismo se alcanzó un valor de Energía de activación de Ea = 24.062 KJ/mol y de la constante de Arrhenius k0 = 0.0197 min-1.  Se concluye que existe variabilidad inversa entre el color de la macroalga y la temperatura aplicada en el proceso de secado; siendo los valores de los parámetros de color L*, a*, b* de la macroalga disminuye a medida que se incrementa la temperatura, acarreando con ello la degradación del color

Teacher resilience in adverse contexts: issues of professionalism and professional identity

Teacher resilience is a construct that is relative, developmental and dynamic; it is socially constructed and depends on personal and professional dispositions. Issues of commitment, professionalism, and professional identity, for instance, need to be taken into account if teacher resilience is to be fully understood. In this chapter I draw upon a larger piece of research aimed at investigating teachers’ work and lives in challenging circumstances. Data were collected through a national survey (n=2702 teachers), focus group (n=99 teachers) and interviews to 11 school principals. Findings suggest the connection between teacher commitment and resilience which are associated with issues of school culture and leadership, a sense of vocation, and teachers’ beliefs and professional values. Factors and sources of teacher motivation and resilience are also identified within a context marked by teacher intensification, lack of trust, worsening of teaching conditions, lower social and economic status and legislative “tsunami”. The chapter ends with the discussion of the importance of relationships in the teaching profession and issues of motivation and professionalism which entails given ways of being and feeling as a teacher.Financial Support by CIEC (Research Centre on Child Studies, IE, UMinho; FCT R&D unit 317, Portugal) by the Strategic Project UID/CED/00317/2013, with financial support of National Funds through the FCT (Foundation for Science and Technology) and co-financed by European Regional Development Funds (FEDER) through the COMPETE 2020 - Competitiveness and Internationalization Operational Program (POCI) with the reference POCI-01-0145-FEDER-00756

Interfaces no convencionales : Su impacto en las interacciones

La comunidad en Interacción Humano Computadora (HCI) ha mostrado que las Interfaces de Usuario están trascendiendo los escritorios. Estas interfaces emergentes emplean técnicas novedosas para el ingreso de los datos, ejemplo de esto lo constituyen las interfaces hápticas, las tangibles, las basadas en cámaras entre otras. Por otro lado la presentación de información se realiza a través de una variedad de dispositivos cada vez más amplia y tendientes a embeberse en el entorno del usuario. Todo esto demanda una profunda revisión y adecuación de los paradigmas de interacción tradicionales y seguramente la formulación de nuevos modelos que potencien su utilidad.Eje: Computación gráfica, Imágenes y VisualizaciónRed de Universidades con Carreras en Informática (RedUNCI

Inclusive Search for Anomalous Production of High-pT Like-Sign Lepton Pairs in Proton-Antiproton Collisions at sqrt{s}=1.8 TeV

We report on a search for anomalous production of events with at least two charged, isolated, like-sign leptons with pT > 11 GeV/c using a 107 pb^-1 sample of 1.8 TeV ppbar collisions collected by the CDF detector. We define a signal region containing low background from Standard Model processes. To avoid bias, we fix the final cuts before examining the event yield in the signal region using control regions to test the Monte Carlo predictions. We observe no events in the signal region, consistent with an expectation of 0.63^(+0.84)_(-0.07) events. We present 95% confidence level limits on new physics processes in both a signature-based context as well as within a representative minimal supergravity (tanbeta = 3) model.Comment: 15 pages, 4 figures. Minor textual changes, cosmetic improvements to figures and updated and expanded reference