Work Ability Index: Psychometric Testing in Aeronautical Industry Workers

González-Domínguez María Eugenia,Fernández-García Elena,Paloma-Castro Olga,González-López Regina María,Rivas Pérez María Paz,López-Molina Luis,García-Jiménez Jesús,Romero-Sánchez José Manuel 한국산업안전보건공단 산업안전보건연구원 2024 Safety and health at work Vol.15 No.1

Background The Work Ability Index (WAI) is an instrument that measures work ability. The wide dispersion of the WAI internationally has led to its adaptation for use in different countries. This study aimed to evaluate the psychometric properties of the Spanish version of the WAI. Methods A methodological design was used over an opportunistic sample of 233 workers in the aeronautical industry in Spain. Reliability was evaluated through internal consistency. Factorial validity, known groups, and convergent validity were tested. Results The Cronbach's alpha and item-total correlation indicated an adequate internal consistency. The confirmatory factor analysis, performed to evaluate the factorial validity, found adequate fit indices for a two-factor solution with a high correlation between the factors. Factor 1, “Subjectively estimated work ability and resources”, was composed of 3 subscales and factor 2, “Ill-health-related”, of 2 subscales. Subscales 4 and 6 had loading in both factors. Workers under 45 years of age obtained higher significant scores than older ones. Convergent validity was also evidenced since WAI was highly correlated with self-assessment of health status. Conclusions The Spanish version of the WAI has shown evidence of reliability and validity in this study, supporting its use in individual and collective health surveillance by occupational health professionals. The factorial solution that was found has previously been reported in another international context. However, further research is needed to resolve the discrepancies detected in the role of some subscales between other national and international studies. Background The Work Ability Index (WAI) is an instrument that measures work ability. The wide dispersion of the WAI internationally has led to its adaptation for use in different countries. This study aimed to evaluate the psychometric properties of the Spanish version of the WAI. Methods A methodological design was used over an opportunistic sample of 233 workers in the aeronautical industry in Spain. Reliability was evaluated through internal consistency. Factorial validity, known groups, and convergent validity were tested. Results The Cronbach's alpha and item-total correlation indicated an adequate internal consistency. The confirmatory factor analysis, performed to evaluate the factorial validity, found adequate fit indices for a two-factor solution with a high correlation between the factors. Factor 1, “Subjectively estimated work ability and resources”, was composed of 3 subscales and factor 2, “Ill-health-related”, of 2 subscales. Subscales 4 and 6 had loading in both factors. Workers under 45 years of age obtained higher significant scores than older ones. Convergent validity was also evidenced since WAI was highly correlated with self-assessment of health status. Conclusions The Spanish version of the WAI has shown evidence of reliability and validity in this study, supporting its use in individual and collective health surveillance by occupational health professionals. The factorial solution that was found has previously been reported in another international context. However, further research is needed to resolve the discrepancies detected in the role of some subscales between other national and international studies.

Nutritional Needs in the Professional Practice of Swimming: a Review

Raúl Domínguez,Antonio Jesús-Sánchez-Oliver,Eduardo Cuenca,Pablo Jodra,Sandro Fernandes da Silva,Fernando Mata-Ordóñez 한국운동영양학회 2017 Physical Activity and Nutrition (Phys Act Nutr) Vol.21 No.4

[Purpose] Swimming requires developing a high aerobic and anaerobic capacity for strength and technical efficiency. The purpose of this study was to establish the nutritional requirements and dietary strategies that can optimize swimming performance. [Methods] Several related studies retrieved from the databases, Dialnet, Elsevier, Medline, Pubmed, and Web of Science, through keyword search strategies were reviewed. [Results] The recommended carbohydrate intake ranges between 6-10-12 g/kg/d, protein 2 g/kg/d, and fat should surpass 20-25% of the daily intake. [Conclusion] Performance can be optimized with a hydration plan, as well as adequate periodization of supplements, such as caffeine, creatine, sodium bicarbonate, B-alanine, beetroot juice, Vitamin D, bovine colostrum, and HMB.

Repeated spurious elevation of serum prostate-specific antigen values solved by chemiluminescence analysis: A possible interference by heterophilic antibodies

Arturo Domínguez,Miquel Bayó,Jesús Muñoz-Rodríguez,Jose Antonio Bellido,Jose María Abascal-Junquera,Naim Hannaoui,Josep Maria Banús 대한비뇨의학회 2015 Investigative and Clinical Urology Vol.56 No.11

Heterophilic antibodies are human immunoglobulins directed against various animal antigens. They can produce false-positive results in the analysis of different tumor markers, including prostate-specific antigen. This interference can lead to misdiagnosis, unnecessary tests, and overtreatment in some cases. We present herein the case of a 52-year-old man with repeated spurious elevation of prostate-specific antigen, reaching levels of 108.7 ng/mL, that were suspected to be caused by heterophilic antibodies. The interference was solved by changing the analysis technique. Real values of prostate-specific antigen were less than 1 ng/mL.

Determination of Capsaicin, Ascorbic Acid, Total Phenolic Compounds and Antioxidant Activity of Capsicum annuum L. var. serrano by Mid Infrared Spectroscopy (Mid-FTIR) and Chemometric Analysis

Ivonne Domínguez-Martínez,Ofelia Gabriela Meza-Márquez,Guillermo Osorio-Revilla,José Proal-Nájera,Tzayhrí Gallardo-Velázquez 한국응용생명화학회 2014 Applied Biological Chemistry (Appl Biol Chem) Vol.57 No.1

Fourier transform mid-infrared (Mid-FTIR) spectroscopyin conjunction with multivariate analysis was used to predict thecapsaicin content, ascorbic acid, total phenolic compounds, andantioxidant activity of Capsicum annuum L. variety serrano. Twomultivariate calibrations, partial least square (PLS), and principalcomponent regression (PCR) were optimized to construct thecalibration models. The best models used to quantify the abovementioned compounds were obtained with the PLS algorithm andcoefficients of determination (R2) greater than 0.998 as well as astandard error calibration less than 0.098. The results demonstratedthat Mid-FTIR spectroscopy in combination with multivariateanalysis can be effectively used for to quantify the capsaicin,ascorbic acid, total phenol content, and antioxidant activity ofCapsicum annuum var. serrano. Mid-FTIR spectroscopy incombination with multivariate calibration offers rapid, easy samplepreparation, is environmentally friendly, and is operationallyuncomplicated, demonstrating the significant advantages of thechemometric models compared with conventional methods ofanalysis.

Enhanced solid element for modelling of reinforced concrete structures with bond-slip

Norberto Domínguez,Marco Aurelio Fernández,Adnan Ibrahimbegovic 사단법인 한국계산역학회 2010 Computers and Concrete, An International Journal Vol.7 No.4

Since its invention in the 19th century, Reinforced Concrete (RC) has been widely used in the construction of a lot of different structures, as buildings, bridges, nuclear central plants, or even ships. The details of the mechanical response for this kind of structures depends directly upon the material behavior of each component: concrete and steel, as well as their interaction through the bond-slip, which makes a rigorous engineering analysis of RC structures quite complicated. Consequently, the practical calculation of RC structures is done by adopting a lot of simplifications and hypotheses validated in the elastic range. Nevertheless, as soon as any RC structural element is working in the inelastic range, it is possible to obtain the numerical prediction of its realistic behavior only through the use of non linear analysis. The aim of this work is to develop a new kind of Finite Element: the “Enhanced Solid Element (ESE)” which takes into account the complex composition of reinforced concrete, being able to handle each dissipative material behavior and their different deformations, and on the other hand, conserving a simplified shape for engineering applications. Based on the recent XFEM developments, we introduce the concept of nodal enrichment to represent kinematics of steel rebars as well as bonding. This enrichment allows to reproduce the strain incompatibility between concrete and steel that occurs because of the bond degradation and slip. This formulation was tested with a couple of simple examples and compared to the results obtained from other standard formulations.

Grain Boundaries and Phases Identification of Metallographic Images by a Normalized Sobel Operation and the Edge Thinning Process for Further Numerical Simulation

G. Domínguez‑Rodríguez,J. A. González‑Sánchez,J. Rosado‑Carrasco,G. Canto 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.9

The recognitions of phases and precise grain boundaries based on metallographic images are useful for conducting micromechanicalsimulations, such as finite element analysis and peridynamics. In this work, those processes are automatized byusing a Sobel operator for identifying edges, which is normalized by different proposed Gaussian filters (on intensity, rugosity,or both). After that, a threshold is used to discretize the edges. Different neighboring pixel configurations, sensitive to edgeintensity, are proposed for thinning and cleaning the discretized edges, and hence, grain boundaries with a one-pixel thicknessare obtained. Then, the phase is selected by averaging color of each delimited grain. Finally, the precision on the phaserecognition was found to increase from 75.61 to 83.6% for the unmodified and the normalized Sobel operator, respectively.

Properties of polarised emission in radio relics

Paola Domínguez Fernández 한국천문학회 2021 天文學會報 Vol.46 No.2

Analysis and Study of Characteristic FTIR Absorption Peaks in Hafnium Oxide Thin Films Deposited at Low-Temperature

Rafael A. Salinas Domínguez,Abdu Orduña-Díaz,Sonia Cerón,Miguel A. Dominguez 한국전기전자재료학회 2020 Transactions on Electrical and Electronic Material Vol.21 No.1

In this study, hafnium oxide (HfO2 ) thin fi lms were deposited by spin coating technique at diff erent low deposition temperatures (150 °C, 200 °C and 250 °C). The properties of the films were measured by UV–visible spectroscopy, X-ray diff raction and Fourier transform infrared spectroscopy (FTIR) in the attenuated total refl ectance mode. The fi lms exhibit the typical absorption peaks related to Hf–O bonds. Interestingly, a trend is clearly observed between the transmittance, crystallographic planes and FTIR characteristic peaks as deposition temperature increases. Moreover, the fabrication and characterization of MOS capacitors is presented. The current–voltage and capacitance–voltage curves corroborated the trend observed in thecharacterization of the HfO 2 films.

I walk, therefore I am: a multidimensional study on the influence of the locomotion method upon presence in virtual reality

José L. Soler-Domínguez,Carla de Juan,Manuel Contero,Mariano Alcañiz 한국CDE학회 2020 Journal of computational design and engineering Vol.7 No.5

A defining virtual reality (VR) metric is the sense of presence, a complex, multidimensional psychophysical construct that represents how intense is the sensation of actually being there, inside the virtual environment (VE), forgetting how technology mediates the experience. Our paper explores how locomotion influences presence, studying two different ways of artificial movement along the VE: walking-in-place (through head bobbing detection) and indirect walking (through touchpad). To evaluate that influence, a narrative-neutral maze was created, from where 41 participants (N=41) had to escape. Measuring presence is a controversial topic since there is not a single, objective measure but a wide range of metrics depending on the different theoretical basis. For this reason, we have used for the first time, representative metrics from all three traditional dimensions of presence: subjective presence (SP) (self-reported through questionnaires), behavioral presence (BP) (obtained from unconscious reactions while inside the VE), and physiological presence (PP) [usually measured using heart rate or electrodermal activity (EDA)]. SP was measured with the ITC-SOPI questionnaire, BP by collecting the participants’ reactions, and PP by using a bracelet that registered EDA. The results show two main findings: (i) There is no correlation between the different presence metrics. This opens the door to a simpler way of measuring presence in an objective, reliable way. (ii) There is no significant difference between the two locomotion techniques for any of the three metrics, which shows that the authenticity of VR does not rely on how you move within the VE.

Experience of Virtual and Distance Training for Rural Teachers of Peru. Case study: Educational Robotics Course

Fernández Morales, Cecilia,Iriarte Gómez, Fernando,Mejía Solano, Carmen,Revuelta Domínguez, Francisco Ignacio APEC국제교육협력원 2017 Asia-Pacific Cybereducation Journal Vol.13 No.2

In Peru, according to the Census of Students (ECE) carried out by the Ministry of Education at 2016 (MINEDU), there are sustained differences between learning goals in rural and urban schools. There are more than 20 thousand educational robotic kits distributed nationwide. It requires trained teachers to develop their digital competence and integrate these resources into the teaching-learning process. In this context, a virtual course was designed and executed, showing rural teachers how to plan learning sessions that integrate Information and Communication Technologies (ICT) in their pedagogical practice. The course was validated with 2500 registered teachers. In the first court, 300 did not log into the virtual classroom, 500 did not to complete the course, 1170 remained active, 534 successfully completed the course and 473 gained a certificate through the virtual platform. In the second court, there are 667-registered teachers. The conclusions of the experience indicate that it is possible to implement strategies for electronic learning aimed at rural teachers in a sustainable and cost - effective way using ICT, which spontaneously create virtual communities of collaborative learning, which support the process allowing implementation the "Knowledge Management". This experience will allow us to make recommendations for rural education policy in Peru (Fernández Morales, Iriarte Gómez, Mejía Solano, & Revuelta Domínguez, 2017).