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Comments on "what the back of the object looks like: 3D reconstruction from line drawings without hidden lines"
Institute of Electrical and Electronics Engineers (2009-08)I comment on a paper describing a method for deducing the hidden topology of an object portrayed in a 2D natural line drawing. The principal problem with this paper is that it cannot be considered an advance on (or even ... -
Comments on “Vibration of simply supported beams under a single moving load: A detailed study of cancellation phenomenon” by C.P. Sudheesh Kumar, C. Sujatha, K. Shankar
Elsevier (2017-08)In a recent paper, Sudheesh Kumar et al. analysed, from dif- ferent points of view, the phenomenon of cancellation in simply supported beams under constant moving loads [1] . This article presented some novel facts ... -
Commercial refrigeration – An overview of current status
Elsevier (2015)Commercial refrigeration comprises food freezing and conservation in retail stores and supermarkets, so, it is one of the most relevant energy consumption sectors, and its relevance is increasing. This paper reviews the ... -
Comparative analysis of HFO-1234ze(E) and R-515B as low GWP alternatives to HFC-134a in moderately high temperature heat pumps
Elsevier (2020-12-17)This article provides a theoretical energy performance and carbon footprint analysis of the hydrofluoroolefin HFO-1234ze(E) and the mixture R-515B as low global warming potential (GWP) refrigerants to replace the ... -
Comparative evaluation of R1234yf, R1234ze(E) and R450A as alternatives to R134a in a variable speed reciprocating compressor
Elsevier (2016-11-01)A comparative energetic evaluation of R1234yf, R1234ze(E) and R450A as alternatives to R134a in a variable speed compressor is carried out. A compressor model based on dimensionless numbers was obtained using the ... -
Comparative evaluation of the intermediate systems employed in two-stage refrigeration cycles driven by compound compressors
Elsevier (2010)This work presents an experimental evaluation, from an energy analysis point of view, for two of the most used inter-stage systems in two-stage vapour compression cycles driven by compound compressors: the direct liquid ... -
Comparative study of transcritical vapor compression configurations using CO2 as refrigeration mode base on simulation
Elsevier (2013-03)Despite of the excellent efficiency of the CO2 transcritical cycle in heat pump mode, there is a loss of efficiency in refrigeration mode compared with the subcritical vapor compression cycle with HFC refrigerants. This ... -
Comparison of different collection systems for sorted household waste in Spain
Elsevier (2010)The purpose of this study was to identify the different selective collection systems implemented in Spanish cities and to analyse the efficiency and extent to which the targets proposed by current law are met in each case. ... -
Comparison of environmental impacts of building structures with in situ cast floors and with precast concrete floors
Elsevier (2009)In this paper, the environmental impacts of two types of slab systems are studied. The first type, a concrete-based one-way spanning slab, is the most common solution in residential buildings in Spain. The second type, a ... -
Comparison of Grasping Performance of Tendon and Linkage Transmission Systems in an Electric-Powered Low-Cost Hand Prosthesis
The American Society of Mechanical Engineers (ASME) (2018-12-24)The popularization of fused deposition modelling technology and open-source microcontrollers have permitted the explosion of electric hand prostheses that can be designed, shared, built and operated at a low-cost, under ... -
Comparison of the carbon footprint of different patient diets in a Spanish hospital
Sage (2015)Abstract Objectives: Mitigating climate change requires management strategies to reduce greenhouse gas emissions in any sector, including the health system. Carbon footprint calculations should play a key role in ... -
Comparison of the degree of creativity in the design outcomes using different design methods
Taylor & Francis (2012)This work analyses the influence of several design methods on the degree of creativity of the design outcome. A design experiment has been carried out in which the participants were divided into four teams of three members, ... -
Comprehensive experimental evaluation of R1234yf-based low GWP working fluids for refrigeration and heat pumps
Elsevier (2022-03-17)This work presents an experimental comparison for low GWP refrigerants used in vapour compression cooling and heating systems. The study compares three lower global warming potential (GWP) refrigerants (R513A, R516A, and ... -
Compressive strength and microstructure of alkali-activated blast furnace slag/sewage sludge ash (GGBS/SSA) blends cured at room temperature
Springer Verlag (2017)In the present work, ground granulated blast furnace slag (GGBS) and sewage sludge ash (SSA) blends were assessed for the production of alkali-activated pastes and mortars. Percentages of SSA to substitute GGBS ranged ... -
Compressive strength and microstructure of alkali-activated mortars with high ceramic waste content
Elsevier (2017-11)The present work investigated alkali-activated mortars with high ceramic waste contents. Tile ceramic waste (TCW) was used as both a recycled aggregate (TCWA) and a precursor (TCWP) to obtain a binding matrix by the ... -
Compressor model for CO2-doped blends. Correction factor of EN 12900 for mixtures with R152a, R290, R1233zd(E)
Elsevier (2024-08-15)It has been experimentally verified that doping CO2 with small amounts of other fluids enhances the COP of refrigeration systems thanks to the modification of the thermophysical properties, as it increases the critical ... -
Computational tool for experimental refrigeration system analysis using spreadsheets
Publicaciones DYNA (2014-12)This paper presents a spreadsheet application for data filtering and energy analysis, which has applications in research and experimental evaluation of the energetic performance of alternative refrigerants. Experimental ... -
Computer-aided sketching as a tool to promote innovation in the new product development process
Elsevier (2009)Sketching is an established part of engineering culture. Sketches assist product designers during the creative stages of design and help them to develop inventions. Paper-and-pencil sketching is highly useful but lacks ... -
Computerized design of advanced straight and skew bevel gears produced by precision forging
Elsevier (2011-07-01)The computerized design of advanced straight and skew bevel gears produced by precision forging is proposed. Modifications of the tooth surfaces of one of the members of the gear set are proposed in order to localize the ... -
Computerized Generation and Finite Element Stress Analysis of Endodontic Rotary File
Computerized Generation and Finite Element Stress Analysis of Endodontic Rotary File (2021-05-02)Introduction: The finite element method has been extensively used to analyze the mechanical behavior of endodontic rotary files under bending and torsional conditions. This methodology requires elevated computer-aided ...