Babassu Fibers as Green Mortar Additives

Babassu carbohydrate fibers (BCF) are abundant and renewable materials that are currently underutilized. The present work evaluates the use of alkaline- treated BCF (TF − 0.6, 1.0, 1.4% w/w) as additive to cementitious mortars. Mass consistency, specific mass, water absorption, void ratio, and porosity, as well as compressive and indirect tension fracture strengths, were evaluated and compared to control mortars (without fiber addition). The results confirmed that the treated BCF can be an effective alternative as a potential reinforcement in cementitious composites. Furthermore, they are prepared by an alkaline treatment that is easy to operate, cost-effective, and efficient. The addition of BCF to the cement matrix decreased the water absorption capacity and void ratio, whereas increased compressive and tensile strength compared to mortars prepared in the absence of BCF. In particular, the addition of 1.0% of TF increased the compressive strength by up to 77%. Good interfacial adhesion of the alkaline-treated BCF with the rest of mortar components resulted in an increase in the values of mechanical properties. The studied fibers are potential materials for new sustainable mortars with improved properties

Comparative validity of the OIDP and OHIP-14 in describing the impact of oral health on quality of life in a cross-sectional study performed in Spanish adults

Objectives: We aimed to compare the utility and validity of two popular socio-dental indicators (OIDP and OHIP- 14) for describing the impact of oral conditions on quality of life applied simultaneously. Study design: We recruited a consecutive sample of 270 healthy Spanish workers visiting the Employment Risk Prevention Centre for a routine medical check-up. OHIP-14 was self-completed before the oral examination and the face to face interview of the OIDP was performed. Both instruments were compared by evaluating its reliability and its validity. Results and Conclusions: The standardised Cronbach alphas for OHIP-14 and OIDP were 0.89 and 0.74 respectively. OIDP showed lower face validity but higher content validity than OHIP-14. Both indicators showed high construct and criterion validity, since individuals perceiving need for dental treatment or having any complaint about their mouth obtained significantly higher total OIDP and OHIP scores than their counterparts. The prevalence of impacts was much higher using the OHIP (80.7%) than the OIDP (27.8%). © Medicina Oral S. L

Dimensional structure of the oral health-related quality of life in healthy Spanish workers

Article number: 24 (2010)[EN]Oral health-related quality of life (OHQoL) is conceived as a multidimensional construct. Here our aim was to investigate the dimensional structure of OHQoL as measured by the Spanish versions of the Oral Impacts on Daily Performance (OIDP) and the Oral Health Impact Profile (OHIP-14) questionnaires applied simultaneously. Methods We recruited a consecutive sample of 270 healthy Spanish workers visiting the Employment Risk Prevention Centre for a routine medical check-up. OHIP-14 was self-completed by participants but the OIDP was completed in face-to-face interviews. An Exploratory Factor Analysis (EFA) was performed to identify the underlying dimensions of the OHQoL construct assessed by both instruments. This factorial structure was later confirmed by Confirmatory Factor Analysis (CFA) using several estimators of goodness of fit indices. Results EFA and the CFA identified and respectively confirmed a set of 3 underlying factors in both questionnaires that could be interpreted as functional limitation, pain-discomfort, and psychosocial impacts. The model achieved was seen to fit properly for both instruments, but the factorial structure was clearer for the OIDP. Conclusions The results provide evidence for construct equivalence in the latent factors assessed by both OIDP and OHIP-14, suggesting that OHQoL is a three-dimensional construct. The prevalence of impact on these three factors was coherent between both indicators, pain-discomfort having the highest prevalence, followed by psycho-social impact, and functional limitation

Comparative validity of the OIDP and OHIP-14 in describing the impact of oral health on quality of life in a cross-sectional study performed in Spanish adults

[EN]Objectives: We aimed to compare the utility and validity of two popular socio-dental indicators (OIDP and OHIP-14) for describing the impact of oral conditions on quality of life applied simultaneously. Study design: We recruited a consecutive sample of 270 healthy Spanish workers visiting the Employment Risk Prevention Centre for a routine medical check-up. OHIP-14 was self-completed before the oral examination and the face to face interview of the OIDP was performed. Both instruments were compared by evaluating its reliability and its validity. Results and conclusions: The standardised Cronbach alphas for OHIP-14 and OIDP were 0.89 and 0.74 respectively. OIDP showed lower face validity but higher content validity than OHIP-14. Both indicators showed high construct and criterion validity, since individuals perceiving need for dental treatment or having any complaint about their mouth obtained significantly higher total OIDP and OHIP scores than their counterparts. The prevalence of impacts was much higher using the OHIP (80.7%) than the OIDP (27.8%)

Dimensional structure of the oral health-related quality of life in healthy Spanish workers

<p>Abstract</p> <p>Background</p> <p>Oral health-related quality of life (OHQoL) is conceived as a multidimensional construct. Here our aim was to investigate the dimensional structure of OHQoL as measured by the Spanish versions of the Oral Impacts on Daily Performance (OIDP) and the Oral Health Impact Profile (OHIP-14) questionnaires applied simultaneously.</p> <p>Methods</p> <p>We recruited a consecutive sample of 270 healthy Spanish workers visiting the Employment Risk Prevention Centre for a routine medical check-up. OHIP-14 was self-completed by participants but the OIDP was completed in face-to-face interviews. An Exploratory Factor Analysis (EFA) was performed to identify the underlying dimensions of the OHQoL construct assessed by both instruments. This factorial structure was later confirmed by Confirmatory Factor Analysis (CFA) using several estimators of goodness of fit indices.</p> <p>Results</p> <p>EFA and the CFA identified and respectively confirmed a set of 3 underlying factors in both questionnaires that could be interpreted as functional limitation, pain-discomfort, and psychosocial impacts. The model achieved was seen to fit properly for both instruments, but the factorial structure was clearer for the OIDP.</p> <p>Conclusions</p> <p>The results provide evidence for construct equivalence in the latent factors assessed by both OIDP and OHIP-14, suggesting that OHQoL is a three-dimensional construct. The prevalence of impact on these three factors was coherent between both indicators, pain-discomfort having the highest prevalence, followed by psycho-social impact, and functional limitation.</p

Influence of Soft Tissue Thickness on Periâ Implant Marginal Bone Loss: A Systematic Review and Metaâ Analysis

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142241/1/jper0690.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/142241/2/jper0690-sup-0001.pd

La falla de Tíscar: su significado en la terminación sudoeste del arco Prebético

10 páginas, 11 figuras, 1 tabla.[EN] The Tíscar fault, located towards the SW end of the Prebetic arc, is an important feature within the Betic External Zone which contributed to the separation of two different geologic domains. This fault affected the Mesozoic and Tertiary cover detached from the Palaeozoic basement and was developed as consequence of the blockage of the thrust sheets of the western border of the arc, because they could not advance farther over the basement situated progressively in a shallower position. Hence, this fault encouraged the continuation of the NW displacements in the western block, formed by Subbetic olistostromic masses and part of the Prebetic situated in the end of the arc. Although the Tíscar fault has been defined by one main line, there are in fact other parallel faults that form a broad fault zone. Its displacement began during the late Miocene and continued till Pliocene, within a near N-S compressive setting with a perpendicular extension.[ES] La falla de Tíscar, localizada en la terminación SO del arco Prebético, es un rasgo importante dentro de la Zona Externa Bética, donde ha contribuido a la separación de dos dominios geológicos diferentes. Esta falla afectó a la cobertera mesozoica y terciaria despegada del basamento paleozoico y se formó como consecuencia de que los cabalgamientos del borde occidental del arco quedaron bloqueados al no poder avanzar más sobre el basamento cada vez menos profundo. Entonces la falla permitió la continuación de los movimientos hacia el NO de su bloque occidental formado por materiales del Subbético, dispuesto en masas olistostrómicas, e incluso parte del propio Prebético del extremo del arco. Aunque la falla de Tíscar se ha definido por su traza principal, existen otras paralelas que en conjunto forman una amplia zona. Sus movimientos iniciados en el Mioceno superior continuaron hasta el Plioceno, en un contexto de compresión N-S y extensión perpendicular.Este estudio se ha financiado a través de los proyectos BTE2001-5230-E, CGL200401636/BTE, CGL2004-03333/ BTE, CGL2005-01520/BTE y BTE2001-5230-E y los grupos de la Junta de Andalucía RNM 163 y 217.Peer reviewe

NGC 6153: Reality is complicated

We study the kinematics of emission lines that arise from many physical processes in NGC 6153 based upon deep, spatially-resolved, high resolution spectra acquired with the UVES spectrograph at the ESO VLT. Our most basic finding is that the plasma in NGC 6153 is complex, especially its temperature structure. The kinematics of most emission lines defines a classic expansion law, with the outer part expanding fastest (normal nebular plasma). However, the permitted lines of \ion{O}{1}, \ion{C}{2}, \ion{N}{2}, \ion{O}{2}, and \ion{Ne}{2} present a constant expansion velocity that defines a second kinematic component (additional plasma component). The physical conditions imply two plasma components, with the additional plasma component having lower temperature and higher density. The [\ion{O}{2}] density and the [\ion{N}{2}] temperature are anomalous, but may be understood considering the contribution of recombination to these forbidden lines. The two plasma components have very different temperatures. The normal nebular plasma appears to be have temperature fluctuations in part of its volume (main shell), but only small fluctuations elsewhere. The additional plasma component contains about half of the mass of the N$^{2+}$ and O$^{2+}$ ions, but only $3-5$\% of the mass of H$^+$ ions, so the two plasma components have very different chemical abundances. We estimate abundances of $12+\log(\mathrm O^{2+}/\mathrm H^+)\sim 9.2$\,dex and $\mathrm{He}/\mathrm H\sim 0.13$. Although they are all complications, multiple plasma components, temperature fluctuations, and the contributions of multiple physical processes to a given emission line are all part of the reality in NGC 6153, and should generally be taken into account.Comment: 55 pages, 51 figures, 9 tables, accepted for publication in The Astronomical Journa

Teacher education and critical thinking: Systematizing theoretical perspectives and formative experiences in Latin America

Within the theoretical framework of teacher education and critical thinking, this work of systematization of educational experiences sought to track trends and describe perspectives in Latin America through documentary reviews and qualitative surveys. The data were analyzed through techniques such as reduction, representation and interpretation (Rodríguez, Gil &amp; García, 1999). The results suggest that the cognitive approach predominates in the conceptualization of critical thinking, assuming it as a process of acquisition and development of mental abilities, which can be developed through critical training in reading and writing. However, there is an absence of proposals that address attitudinal, motivational and emotional issues.Within the theoretical framework of teacher education and critical thinking, this work of systematization of educational experiences sought to track trends and identify perspectives in Latin America by collecting data through two different stages: a documentary review and the analysis of a qualitative online survey. The results suggested that the cognitive approach prevailed in the conceptualization of critical thinking, confirming that it is a process of acquisition and development of mental abilities, which could be developed through critical training in reading and writing. However, there was an absence of proposals that addressed attitudinal, motivational, and emotional issues