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Risk management of occupational exposure to nanoparticles during a development project: A case study

Abstract: The production of nanotechnology based products is increasing, along with the conscience of the possible harmful effects of some nanomaterials. Along with technological advances, there is the need to improve knowledge of safety and health and apply that knowl

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Prevalence and symptomatology of musculoskeletal problems reported by home care service workers caring for the elderly
Dina Chagas

Abstract: Work-related musculoskeletal disorders (WRMSDs) develop gradually and result from professional risk factors such as the repetition of tasks, emotional overburden, inadequate posture, excessive strain, and individual and organizational/psychosocial risks. The

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Current state of the art and enduring issues in anthropometric data collection

Abstract: The study of human body size and shape has been a topic of research for a very long time. In the past, anthropometry used traditional measuring techniques to record the dimensions of the human body and reported variance in body dimensions as a function of mea

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Understanding finger postures when touching targets on the touchscreen of mobile devices

Abstract: This paper presents the results of a preliminary study on the interaction of the fingertip and a mobile device’s touch screen. The objective of this study is to identify the finger postures that will be included in the main study on the contact area in the in

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Tackling the challenges of an aging workforce with the use of wearable technologies and the quantified-self

Abstract: The world's population is aging at an unprecedented rate, this demographic shift will change all aspects of life, including work. The aging of the worforce and a higher percentage of workers who will work past traditional retirement years presents significant

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Analysis and characterization of starchy and cellulosic materials after enzymatic modification

Abstract: This study concerns the application of enzymatic hydrolysis to modifying starchy and cellulosic materials. Corn, cassava, upright elephant ear and sugarcane bagasse were used in order to evaluate the influence of the enzymatic hydrolysis over the structural,

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Robust sample size for weibull demonstration test plan

Abstract: The efficiency of a Weibull demonstration test plan is completely determined by the total experimental time (Ta), which depends on the unknown sample size (n) and on the Weibull shape parameter (β). Thus, once β was selected, Ta depends only on n. Unfortunate

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A new hardening rule to model the effect of density on soil behavior

Abstract: The authors propose a new hardening rule for constitutive models based on the subloading concept. This concept allows a smooth transition between unloading and reloading. Most importantly it characterizes the soil with a single set of parameters regardless of

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Decontamination of industrial textile wastewater using photocatalysis

Abstract: Iron-doped TiO2 catalysts were prepared by impregnation in order to study their photocatalytic activity in the treatment of wastewater from the textile industry. Characterization of the catalysts before and after reaction was performed using techniques includ

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Differences between the use of ferric sulphate and ferric chloride on biodesulfurization of a large coal particle

Abstract: Three iron sources (FeSO4, Fe2(SO4)3 and FeCl3) at different concentrations (150, 700 and 1250 mg Fe/L) were evaluated on large coal particle biodesulfurization processes at Erlenmeyer level. A consortium of Acidithiobacillus ferrooxidans (ATCC 23270) and Aci

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Human error and response to alarms in process safety

Abstract: Human operators are required to respond to alarms in normal conditions, and also to find solutions to unexpected situations in real time. The aim of this study is to increase the knowledge of human responses to alarms in the context of occupational situations

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Changes in EEG amplitude (Alpha and Beta waves) with Thermal environment

Abstract: When executing a task, brain activity can be observed through electric waves recorded in different frequency bands. The main ones are the Alpha, Beta, Theta and Delta waves. According to some authors, Alpha and Beta waves are related with cognitive capacity a

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Effects of joints and their waterstops on pressures spread over a slab subject to turbulent flow on a horizontal apron

Abstract: Analyses of measured pressures using multiple sensors above and below a slab subject to supercritical flow and hydraulic jump are presented. Pressures were measured in a physical model constructed in the Hydraulic Laboratory of the Universidad del Valle in Ca

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Assessing the loss-of-insulation life of power transformers by estimating their historical loads and ambient temperature profiles using ANNs and Monte Carlo simulations

Abstract: A non-invasive method useful for asset management is to estimate the functional age of the insulating paper of the transformer that is caused by thermal aging. For this purpose, the hot-spot temperature profile must be assessed by means of some transformer ch

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Thermal assessment of ecological tiles in physical models of poultry houses

Abstract: In countries with tropical climates, such as Brazil, the high summer temperatures associated with high relative humidities are a stress factor in animal production. Excessive heat within a poultry facility causes a reduction in feed intake and production, and

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Statistical performance of control charts with variable parameters for autocorrelated processes

Abstract: Chemical process and automation of data collection for industrial processes are known to result in auto-correlated data. The independence of observations is a basic assumption made by traditional tools that are used for the statistical monitoring of processes

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Symbolic modeling of the Pareto-Optimal sets of two unity gain cells

Abstract: A method to data-mine results of an analog circuit sizing in order to extract knowledge that can be immediately used by designers or students of analog integrated circuit design is presented. The symbolic models, which have been generated using multi-objectiv

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Thermodynamic properties of moisture sorption in cassava flour
Alfredo A. Ayala-Aponte

Abstract: Thermodynamic adsorption properties (differential enthalpy and entropy, spreading pressure and net integral enthalpy and entropy) of cassava flour were determined at 25, 30 and 35°C to provide information about the water and energy requirements for the sorpti

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Cr/CrN bilayer coating behavior under erosion-corrosion degradation by jet impingement testing

Abstract: Cathodic arc technique was used to deposit a Cr/CrN bilayer coating on AISI 440C stainless steel. The morphology and composition of the coating were verified by Scanning Electron Microscope and X-Ray Diffraction. Hardness and adhesion of the coating were also

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Validation of an inertial sensor-based platform to acquire kinematic information for human joint angle estimation

Abstract: This paper shows the results of a set of experiments aimed t at calibrating and validating an inertial sensor-based motion capture system that is used to capture and analyze the elbow joint flexion/extension motion. An experimental platform was constructed th

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Study of the evolution of the residual stress state in thermal barrier coatings sprayed on AISI 304 stainless steel

Abstract: Thermal barrier coatings (TBC) were manufactured by thermal spraying of CoNiCrAlY and YSZ powders, which constituted the bond coat (BC) and top coat (TC), respectively. The BC was deposited on stainless steel substrates by a high velocity oxygen fuel (HVOF) s

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Burst erasure correction using LDPC codes constructed on base matrices generated by matched groups, nested polygons and superposed circulant matrices

Abstract: This article proposes procedures for the construction of base matrices grounded in algebra and geometry. These base matrices serve as a platform to generate the parity check matrices for debugging in bursts erasure through LDPC codes by superposing the base m

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Heat flow assessment in an underground mine: An approach to improve the environmental conditions

Abstract: The generation of heat in underground spaces due to working activities is a factor that influences production and productivity rates. This paper analyses the heat generation in an underground mine and provides a number of approaches to enhance the ventilation

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Secure point-to-point communication using chaos

Abstract: This article presents an alternative for resolving the existing vulnerability of systems that implement masking by means of chaotic synchronization. This system avoids detection of the parameters used as the cipher key by an attacker on implementing encryptio

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Las TIC navegando hacia la sostenibilidad económica y ambiental en el transporte marítimo

Resumen: El Sistema Portuario Español pone en marcha, en abril de 2015, la plataforma web DUEPORT (Declaración Única de Escala Portuaria) con el fin de ser un observatorio de tráfico marítimo de buques, mercancías y residuos en tiempo real, erigiéndose como la medida

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Prioritization of TQM practices in Brazilian medical device SMEs using Analytical Hierarchy Process (AHP)

Abstract: The purpose of this article is to prioritize Total Quality Management (TQM) practices and examine their relative importance in TQM implementation in medical device small and medium enterprises (SME) using the Analytic Hierarchy Process (AHP) method. Mathemati

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Strategic guidelines for supply chain coordination in healthcare and a mathematical model as a proposed mechanism for the measurement of coordination effects

Abstract: Supply chain (SC) management implies a large number of interactions and a great deal of cooperation between the organizations that make up the supply chain in order to fulfill the purposes of logistics processes such as supply, distribution and warehousing. M

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Variables relevantes para la medición de la calidad percibida del servicio bancario

Resumen: El estudio de la calidad percibida de los servicios ha sido ampliamente estudiado pero poco aplicado en el sector bancario por lo cual despierta gran interés por parte de las instituciones prestadoras del servicio e investigadores. Dada la complejidad y gran

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Coordinated recharge of electric vehicles in real time

Abstract: The electric vehicle is a transportation technology that requires a management system for the electric networks of the future in order to avoid overloads and adverse effects on voltage level and power quality. This article presents a management algorithm to a

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Caracterización fisicoquímica de cuatro especies de agaves con potencialidad en la obtención de pulpa de celulosa para elaboración de papel

Resumen: El objetivo general de este trabajo fue encontrar un nuevo valor agregado a las hojas de las agaváceas, desecho de la agroindustria. Se estudiaron cuatro especies de agaves de tres estados de la república mexicana: Agave angustifolia (Oacaxa), Agave tequilana

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