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Book part
Publication date: 3 June 2021

Anirban Sarkar, Prabal Chakraborty and Suchitra Kumari

Europe and North America have witnessed consistent decline in the manufacturing sector over a period of time. It is also evident from the existing literature that shows growth of…

Abstract

Europe and North America have witnessed consistent decline in the manufacturing sector over a period of time. It is also evident from the existing literature that shows growth of Indian manufacturing industries is not at all satisfactory. The objective of the chapter is to analyze the manufacturing sector in India and also to highlight key factors related to the growth of manufacturing industry with special emphasis on Eastern India.

For the estimation, cluster sampling was used to collect data from 166 respondents in India. We initially sent the questionnaire to 200 entrepreneurs out of which 34 respondents did not retrograde. As a result the total sample size was 166. The scales were made operational by using 5-point Likert scales (1 = “Strongly Disagree” to 5 = “Strongly Agree”). We also followed recommended sample size for conducting multinomial logistic regression.

It is found that liberalized foreign direct investment policy, focus on export, focus on increasing rural consumption, delicensing of industries, and financial sector liberalization significantly influence sustainable economic development.

Open Access
Article
Publication date: 27 June 2023

Farid Salari, Paolo Bosetti and Vincenzo M. Sglavo

Particles bed binding by selective cement activation (SCA) method is a computer-aided manufacturing (CAM) technique used to produce cementitious elements. A computer-aided design…

Abstract

Purpose

Particles bed binding by selective cement activation (SCA) method is a computer-aided manufacturing (CAM) technique used to produce cementitious elements. A computer-aided design file is sliced to generate G-codes before printing. This paper aims to study the effect of key input parameters for slicer software on the final properties of printed products.

Design/methodology/approach

The one factor at a time (OFAT) methodology is used to investigate the impact of selected parameters on the final properties of printed specimens, and the causes for the variations in outcomes of each variable are discussed.

Findings

Finer aggregates can generate a more compact layer, resulting in a denser product with higher strength. Fluid pressure is directly determined by voxel rate (rV); however, high pressures enable better fluid penetration control for fortified products; for extreme rVs, residual voids in the interfaces between successive layers and single-line primitives impair mechanical strength. It was understood that printhead movement along the orientation of the parts in the powder bed improved the mechanical properties.

Originality/value

The design of experiment (DOE) method assesses the influence of process parameters on various input printing variables at the same time. As the resources are limited, a fractional factorial plan is carried out on a subset of a full factorial design; hence, providing physical interpretation behind changes in each factor is difficult. OFAT aids in analyzing the effect of a change in one factor on output while all other parameters are kept constant. The results assist engineers in properly considering the influence of variable variations for future DOE designs.

Details

Rapid Prototyping Journal, vol. 29 no. 11
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 6 April 2010

Inês Flores‐Colen, Luís Silva, Jorge de Brito and Vasco Peixoto de Freitas

The purpose of this paper is to analyse two parameters relevant to the physical‐mechanical performance of external renders, mainly, bulk density and apparent or open porosity, by…

Abstract

Purpose

The purpose of this paper is to analyse two parameters relevant to the physical‐mechanical performance of external renders, mainly, bulk density and apparent or open porosity, by performing laboratory tests on samples collected under real in‐service conditions.

Design/methodology/approach

The test procedure (sample preparation and techniques used) and its relationship with the overall performance characteristics and with any anomalies are discussed for each parameter. The analysis of the results covers seven case studies and 15 walls with renders made on site (cementitious and cement‐lime based) and non‐traditional or pre‐mixed renders.

Findings

It was concluded that reliable relationships could be established between the test results and other physical parameters relevant to the mechanical and water‐related behaviour of different types of cementitious renders. Notwithstanding the usual drawbacks of laboratory tests (more time‐consuming, higher costs and greater destruction of the walls), the use of small samples and the additional data obtained in terms of in‐service performance justify the use of this type of test.

Originality/value

The originality of this approach comes from the advantage of conducting both laboratory tests (reliability and standardization) and in situ tests (testing real materials subjected to in‐service conditions). Current practice is either to test virgin materials in quasi‐perfect laboratory conditions (therefore far from reality) or to test materials on site using standard in situ techniques sensitive to subjectivity and in far from ideal environmental conditions.

Details

Structural Survey, vol. 28 no. 1
Type: Research Article
ISSN: 0263-080X

Keywords

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