Search results for "production [antinucleus]"

Sustainability evaluation of Sicily's lemon and orange production: An energy, economic and environmental analysis

2013

The island of Sicily has a long standing tradition in citrus growing. We evaluated the sustainability of orange and lemon orchards, under organic and conventional farming, using an energy, environmental and economic analysis of the whole production cycle by using a life cycle assessment approach. These orchard systems differ only in terms of a few of the inputs used and the duration of the various agricultural operations. The quantity of energy consumption in the production cycle was calculated by multiplying the quantity of inputs used by the energy conversion factors drawn from the literature. The production costs were calculated considering all internal costs, including equipment, materi…

Machining Economics in FMS by a Fuzzy Approach

1995

Abstract In a conventional manufacturing system, cutting parameters have to be fixed in order to pursue the economical and productive target related to each cutting operation. In a Flexible Manufacturing System (FMS), as a consequence of the unbalanced workload due to the mutual interaction among the shared resources, the optimization of each operation does not allow the optimum of the global production system to be reached. A fuzzy programming model is developed in this paper in order to select cutting speeds of the operations in the production plan as a satisfying compromise solution between single operation and the integrated system targets.

A model of goal dynamics in technology-based organizations

2011

The purpose of the present work is to build a suitable system dynamics model for goal dynamics in organizations, as proposed by Barlas and Yasarcan (2008). The proposed model does not bear any ambition of being exhaustive: the main objective of this paper is to propose a model of goal dynamics in which Goal Setting, Management by Objectives and Training are viewed as human resource practices able to enhance workers' goal commitment, and therefore, improve organizational performance. In the first part of this paper, an analysis of the Goal Setting Theory and the role of goal setting practices, in bettering worker's performance, are stressed. In the second part, a case-study, the causal loop …

The impact of Kaizen Events on improving the performance of automotive components' first-tier suppliers

2009

Purpose - The aim of this paper is to explore the possibility of improving production indicators by implementing Kaizen Events. The teams are composed of both managers and operators with the aim of developing and/or implementing improvements in three to five days. Methodology - The empirical research will consists of the description of the results obtained in 11 industrial companies from the automotive components industry. In each company, we have followed up different interventions over a 9-12-month period. Findings - We shall present the initial situation, the activities carried out by the companies and the evolution of manufacturing performance approximately three months after the activi…

Life Cycle Assessment (LCA) of protected crops: an Italian case study

2012

Abstract In this paper a Life Cycle Assessment (LCA) of protected crops was carried out. In particular, energy and environmental performances of peppers, melons, tomatoes, cherry tomatoes, and zucchini in different typologies of greenhouses (tunnel and pavilion) were assessed. The study aimed at assessing the ecoprofile of each product and the share of each life-cycle step on the total environmental impacts. The related process flow chart, the relevant mass and energy flows and the key environmental issues were identified for each product. Collection of primary data was conducted by means of a detailed questionnaire distributed to a producer company in southern Italy. The analysis was devel…

Main Requirements of a Cyber Physical Production System Demonstrator

2019

Abstract The paper is focused on identifying the main requirements for developing a CPPS demonstrator prototype. This research aims to categorize the main components and interactions within a new manufacturing system which are required to accommodate a CPPS. The proposed CPPS demonstrator also includes the preliminary requirements identified from the discussions with the regional industry, so that the prototype of the production system could be easily understood and also be the basis for further collaborations. The identified requirements were structured according to the top-down principle focusing on accomplishing the major objectives to be achieved through the prototype of the production …

On the FSW of AA2024-T4 and AA7075-T6 T-joints: an industrial case study

2009

In this paper, the authors present the results of a wide experimental campaign on aeronautical T-shaped parts of industrial interest characterized by dissimilar materials for the skin and stringer. The friction stir welding process engineering was developed with the aim to determine the specific process parameters determining the soundness on the obtained T-parts both from the metallurgical and mechanical point of view. Furthermore, the performance of the obtained T-joints was investigated.

Decoding the Japanese Lean Production System according to a Viable Systems Perspective

2012

The increase in the complexity and variability of the business environment, due to constant and rapid changes in markets, calls for more flexible and effective production systems. Of the most valuable production systems, the Japanese lean production system (LPS) is the best known and studied, but is still not the most widely applied with success outside Japan. The reason for the low level of success of lean production outside its native country is the lack of understanding of the strong interactions which hold between enterprises and business systems. In order to fill this gap in our knowledge, we investigate the systemic interactions according to the Viable System View. To develop our anal…

The use of hydrogen in residential sector: Economic aspects and environmental benefits

2005

Immigration, factor endowments and the productive structure of Spanish regions, 1996-2005.

2012

The participation of immigrants in the Spanish labour market has increased from less than 3% in 1996 to more than 13% in 2005. The factor proportion model of production was used to examine the impact of such a large labour supply shock on the industrial structure of Spanish regions. The results confirm that, first, labour endowment differences across regions help to explain the regional patterns of industry specialization. Second, immigrants and natives act as complementary factors in most industries. Third, the importance of immigration is relatively small compared with production technique changes and idiosyncratic industry changes in explaining the overall changes in industrial structure. …