Novel Antibacterial and Toughened Carbon-Fibre/Epoxy Composites by the Incorporation of TiO2 Nanoparticles Modified Electrospun Nanofibre Veils

The inclusion of electrospun nanofiber veils was revealed as an effective method for enhancing the mechanical properties of fiber-reinforced epoxy resin composites. These veils will eventually allow the incorporation of nanomaterials not only for mechanical reinforcement but also in multifunctional applications. Therefore, this paper investigates the effect of electrospun nanofibrous veils made of polyamide 6 modified with TiO2 nanoparticles on the mechanical properties of a carbon-fiber/epoxy composite. The nanofibers were included in the carbon-fiber/epoxy composite as a single structure. The effect of positioning these veils in different composite positions was investigated. Compared to the reference, the use of unmodified and TiO2 modified veils increased the flexural stress at failure and the fracture toughness of composites. When TiO2 modified veils were incorporated, new antibacterial properties were achieved due to the photocatalytic properties of the veils, widening the application area of these composites.This research is funded by the ELKARTEK Programme, “ACTIMAT”, grupos de investigación del sistema universitario vasco (IT718-13), the Spanish government through the project TEC2015-63838-C3-1-R-OPTONANOSENS and from the Basque government through the project KK-2017/00089-µ4F

Relación de la calidad de vida profesional y el burnout en médicos de atención primaria

ObjetivoConocer la relación, si es que la hay, entre la calidad de vida profesional (CVP) y burnout de facultativos de atención primaria.DiseñoEstudio transversal mediante cuestionario CVP-35 y MBI (Maslach Burnout Inventory), por correo postal.ÁmbitoTres centros urbanos y 3 zonas de atención rural. Participó un total de 131 profesionalesMedicionesDel CVP-35 se obtienen puntuaciones que van de 0 (mínimo) a 10 (máximo). El cuestionario Maslach clasifica en nivel alto, medio y bajo de cada dimensión.ResultadosContestó a la encuesta el 71,7%. La edad media era de 44 años y la media de tarjetas sanitarias, 1.339. El número de consultas/día fue de 37; en cuanto las visitas domiciliarias, realizaban una diaria. El valor medio de la CVP fue de 4,48 (intervalo de confianza [IC] del 95%, 4,08-4,88). La percepción de la demanda tuvo una puntuación de 5,9 (IC del 95%, 5,6-6,1); la motivación intrínseca del profesional se situó en 6,5 (IC del 95%, 6,2-6,7) y el apoyo de los directivos en 3,8 (IC del 95%, 3,6-4,1). En cuanto al cuestionario MBI, se observó una despersonalización alta en el 54,3%, cansancio emocional alto en un 56,2% y realización personal alta en el 9,3%. La correlación mayor fue entre las demandas en el puesto y el cansancio emocional (r=0,6; p<0,0001), la motivación intrínseca y la realización personal (r=0,46; p<0,0001) y la calidad de vida profesional frente al cansancio emocional (r=−0,4; p<0,0005).ConclusionesLa CVP y el burnout miden dimensiones diferentes pero relacionadas. Por tanto, su utilidad es diferente en función de los objetivos. Con estos instrumentos se pueden identificar elementos clave de la gestión de personas que pueden mejorar la calidad de vida profesional.ObjectiveTo know the relationship, if this exists, between the quality of professional life (CPL) and the burnout of primary health care staff.DesignTransversal study employing CVP-35 test and MBI (Maslach Burnout Inventory), both sent by postmail.Setting3 urban centers and 3 rural centers. Total: 131 professionals.MeasuresIn the CVP-35 test, scores from 0 (minimum) to 100 (maximum) are obtained. Maslach categorised each dimension into high, medium and low level.Results71.7% answered. Medium age 44 years, average of 1339 sanitary cards. The number of visits/day was 37, home visits 1 per day. The CVP average was 4.48 (95% CI, 4.08-4.88). The damage perception in the post 5.9 (95% CI, 5.6-6.1); the professional intrinsic motivation 6.5 (95% CI, 6.2-6.7), and the manager support 3.8 (95% CI, 3.6-4.1). MBI: high depersonalization 54.3%, emotional exhaustion (r=0.6; P<.0001), intrinsic motivation, and personal accomplishment (r=0.46; P<.0001) and profesional quality of life front emotional fatigue (r= −0.4; P<.0005).ConclusionsCPL and burnout measure different but related dimensions. Therefore, its utility is dependent on the objectives. Target elements, which can improve the quality of professional life, can be identified from these tools

Relación entre marketing digital y decisión de compra de los clientes de Servicio Técnico Industrial S.A. Chimbote, 2021

Esta investigación tuvo como objetivo general demostrar la relación que existe entre marketing digital y decisión de compra de los clientes de Servicio Técnico Industrial S.A. Chimbote, 2021. La metodología: el tipo de investigación es aplicada, de nivel correlacional, con un diseño no experimental, de enfoque cualitativo/cuantitativo y de corte transversal. Así mismo, la investigación conto con 120 clientes en su muestra. Así mismo, se realizó la confiabilidad mediante una prueba piloto empleando el estadístico Alfa de Cronbach, que dió como resultado un 0.96 para la variable marketing digital y un 0.93 para la variable decisión de compra. conforme se infiere de la correlación de Pearson r=0.622, cuya significancia hallada proporciona evidencias competentes que llevan a aceptar la hipótesis. Los resultados obtenidos del objetivo específico 01 con un r de Pearson=0.527 relación proporcional moderada, objetivo específico 02 con un r de Pearson=0.621 relación proporcional alta, objetivo específico 03 con un r de Pearson=0.506 relación proporcional moderada y el objetivo específico 04 con un r de Pearson=0.0551 relación proporcional moderada. Por lo tanto, se concluye que existe una correlación positiva alta entre las variables marketing digital y decisión de compra de los clientes de "Servicio Técnico Industrial S.A., Chimbote, 2021”

Single Cord Blood Combined with HLA-Mismatched Third Party Donor Cells: Comparable Results to Matched Unrelated Donor Transplantation in High-Risk Patients with Hematologic Disorders

AbstractMatched unrelated donor (MUD) transplantation is the first alternative in the absence of a matched sibling donor. For patients without a suitable adult donor, we have adopted the dual stem cell transplantation protocol consisting of cord blood (CB) in combination with CD34+ cells from a third party HLA-mismatched donor. We analyzed the outcomes of patients undergoing both procedures in a single center. Starting in 2004, a total of 20 patients with high-risk disease underwent 22 dual transplants and 25 patients underwent myeloablative MUD transplantation. The 30-day cumulative incidence of neutrophil engraftment was similar in both groups (91% and 95%), with a median time to engraftment of 14 and 16 days, respectively. Grade II-IV acute graft-versus-host disease was more frequent in the MUD group (40% versus 5%). Except for a tendency toward a higher incidence of viral hemorrhagic cystitis in the dual transplantation group, posttransplantation infectious events were comparable in the 2 groups. The 3-year cumulative incidence rates of relapse (41% versus 44%) and nonrelapse mortality (30% versus 25%) were similar in the MUD and dual transplantation cohorts. Estimated 3-year overall survival and disease-free survival were 47% and 41%, respectively, with no survival advantage for either group. In our experience, dual transplantation offers survival rates comparable to those from myeloablative MUD transplantation with similar nonrelapse mortality rates

A Low Complexity Sum-Subtract Decoding Algorithm for Non-Binary LDPC Codes over GF(q)

In this paper, we present a low complexity Sum-Subtract decoder for non-binary LDPC codes defined over GF(q). The performance of this decoding algorithm is similar to that of the Fast Fourier Transform Sum-Product algorithm usually utilized for decoding non-binary LDPC codes. It is a simplified algorithm that can be easily implemented on programmable logic technology such as FPGA devices because of its use of only additions and subtractions, avoiding the use of quotients and products, and of float point arithmetic. The algorithm yields a very low complexity programmable logic implementation of an NB-LDPC decoder with an excellent BER performance.Sociedad Argentina de Informática e Investigación Operativ

Plan de negocio para la implementación de un centro de lavado de automóviles tipo autoservicio en la ciudad de Trujillo

El servicio de lavado de autos en la ciudad de Trujillo está dominado por negocios de lavado a presión donde el cliente a cambio de un precio fijo recibe su unidad limpia, interna y exteriormente. El tiempo de espera mínimo de un cliente en un negocio convencional de lavado a presión ronda un promedio de 30 a 50 minutos, dependiendo de la saturación del local, que funciona un promedio de 8 horas diarias. El crecimiento de la economía en los últimos años ha favorecido el crecimiento del parque automotor en la ciudad, creando una demanda insatisfecha que se ve cubierta parcialmente con negocios informales (en la calle). En países como Chile, Colombia y Ecuador existe el formato de negocio autoservicio, donde el cliente es quien realiza la limpieza de su unidad, utilizando dispositivos acondicionados para el uso público. Este formato tiene entre sus ventajas: mejor disponibilidad de horario (hasta 24 horas), menor tiempo de espera (entre 10 a 15 minutos) y menor costo del servicio. Se plantea la posibilidad de instalar un negocio tipo autoservicio en la ciudad de Trujillo, brindando todas las ventajas anteriormente descritas al cliente, quienes no tienen el hábito de realizar la limpieza de su unidad

A flexible model for the collaborative annotation of digitized literary works

Versión del editor: http://www.dh2012.unihamburg.de/conference/programme/abstracts/a-flexible-model-for-the-collaborative-annotation-of-digitized-literaryworks/Para más información sobre el posterior desarrollo de la aplicación, cfr. «@Note, herramienta de lectura digital y anotación colaborativa», en Escritorios electrónicos para las literaturas: Nuevas herramientas digitales para la anotación colaborativa. Madrid: Universidad Complutense de Madrid, 2013, pp. 127-136. Versión digital en http://eprints.ucm.es/21471/Presentación de la herramienta informática @Note versión 1.0 en el congreso de Humanidades Digitales de Hamburgo 2012. En el artículo se describe el planteamiento informático de la aplicación, creada para anotar textos literarios extraídos de la biblioteca digital Google (patrocinador de la investigación mediante uno e los premios del 2010 Digital Humanities Award Program). Mediante el uso de esta se pueden realizar tareas de lectura y anotación colaborativa, ya entre comunidades de estudiantes como de profesores. El artículo describe brevemente las funcionalidades informáticas que permiten crear esos esquemas compartidos y otras características técnicas.This paper presents the annotation model used in @Note 1.0, a system developed at Complutense University (Madrid) funded by the Google’s 2010 Digital Humanities Award Program. @Note 1.0 allows to retrieve digitized works from Google Books collection and add annotations to enrich the texts with research and learning purposes: critical editions, reading activities, e-learning tasks, etc. One of the main features of @Note annotation model is to promote the collaborative creation of annotation schemas by communities of researchers, teachers and students, and the use of these schemas in the definition of annotation activities on literary works.Google Inc., a través del Google’s 2010 Digital Humanities Award Program

Diseño de un codificador ciclico programable para ser utilizado en comunicaciones infrarrojas interiores

Entre los factores más importantes que afectan a las comunicaciones infrarrojas interiores, están el ruido producido por la iluminación ambiental, la potencia infrarroja irradiada y la distancia entre el transmisor y el receptor infrarrojo. Esto provoca que la relación señal a ruido (SNR) en el receptor pueda variar considerablemente produciendo un aumento en los errores durante la transmisión. En este trabajo se expone el diseño de un codificador cíclico implementado con dispositivos programables de ALTERA, que produce una interesante mejora en el funcionamiento del enlace infrarrojo.Eje: Control y electrónicaRed de Universidades con Carreras en Informática (RedUNCI

Evaluation of Minimal Residual Disease by Real-Time Quantitative PCR of Wilms’ Tumor 1 Expression in Patients with Acute Myelogenous Leukemia after Allogeneic Stem Cell Transplantation: Correlation with Flow Cytometry and Chimerism

Relapse remains the main cause of treatment failure in patients with acute myelogeous leukemia (AML) after allogeneic hemopoietic stem cell transplantation (SCT). The Wilms’ tumor 1 gene (WT1) is reportedly overexpressed in >90% of patients with AML and thus can be useful for minimal residual disease (MRD) monitoring. The aim of this study was to evaluate the usefulness of WT1 expression as a relapse predictor marker in patients with AML after SCT and compare it with flow cytometry (FC) and chimerism studies. WT1 expression was assessed retrospectively using quantitative RT-PCR in bone marrow and peripheral blood from 21 patients. Patients were classified according to WT1 dynamics posttransplantation. Eleven of the 21 patients had low and stable WT1 levels. All of these 11 patients showed complete chimerism and negative MRD by FC and remained in complete remission with a median follow-up of 27 months (range, 18-98 months). In contrast, 10 of 21 patients showed WT1 overexpression after SCT, and 9 of these 10 patients relapsed. The incidence of relapse differed significantly between the 2 groups of patients according to WT1 expression post-SCT (P = .00003). Relapse in the 9 patients occurred at a median of 314 days (range, 50-560 days). Interestingly, in these patients, relapse was first predicted by WT1 (with negative FC and complete chimerism) in 7 patients. WT1 overexpression was correlated with disease burden in patients with AML before and after allogeneic SCT. In patients who relapsed, both medullary and extramedullary relapse were better anticipated by WT1 overexpression compared with FC and chimerism

Understanding informal jewellery apprenticeship in Ghana: Nature, processes and challanges

Context: The processes of acquiring education in jewellery in Ghana has been dominated by the informal apprenticeship system and it forms the backbone of the workforce of the jewellery industry in Ghana. However, the patronage of informal jewellery apprenticeship in Ghana in recent times has been on decline even though it has the potential of training human resources to transform Ghana’s precious mineral resources sector.This is based on the belief that jewellery trade and its training are shrouded in secrecy, in other words, the jewellery trade is considered to be a sacred profession where information on its operating systems are not allowed to be shared easily. It is believed to be associated with cult and magic, hence the reluctant to admit people who are from outside the family of particular jewellery enterprise. This study is sought to bring to fore the understanding nature, processes and challenges of the informal jewellery apprenticeship in Ghana. Approach: The study adopted the descriptive and phenomenology research designs (qualitative research methods). Jewellers who own a jewellery business and who are training other people through apprenticeships as well as people who are trained are observed and interviewed. A sample size was selected through purposive and convenience sampling techniques from four jewellery enterprises in Accra, Ghana. A thematic analysis plan was adopted to generate fndings of the study. Findings: The results show that for a person to train as a jeweller, s/he has to enrol by going through induction, futhremore fees (money and perishable items) are to be paid. The training content is driven by orders received by the master jeweller, thereby making it unstructured and lacking criteria for assessing the performance and progress of apprentice jewellers. Teaching and learning methods are usually on-the-job training that rely on demonstrations and observation. Conclusion: Informal jewellery apprenticeship in Ghana uses a fexible, cost-efective approach for transferring jewellery making skills from masters to apprentice jewellers, and it has substantial potential for improving skills training in the country. Sometimes the reluctant of some jeweller to train others is to keep the trade to family members only