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Potato Harvester for Smallholder Producers
Dagninet Amare,
Geta Kidanemariam,
Wolelaw Endalew,
Seyife Yilma
Issue:
Volume 3, Issue 6, December 2015
Pages:
103-108
Received:
25 July 2015
Accepted:
11 August 2015
Published:
26 September 2015
Abstract: The post harvest loss of potato in Ethiopia is more than 25% which includes harvesting loss. To minimize the harvesting loss, providing appropriate equipment (technology) is essential. As a result, a study was carried out to develop and select suitable potato digger for small holder potato producers. Comparisons were conducted on three types of potato diggers; traditional plow, AIRIC potato (ground nut) digger and third newly developed potato digger (BD digger). Bio physical and socio economic data were taken using a structured data sheet. Data was analyzed using descriptive statistics and non parametric statistical tests. The BD digger gave the highest average exposing efficiency (92.40%) and lowest tuber damage (0.81%). The average digging loss for BD digger, with 0.25 ha/hr working capacity, was the lowest (7.61%). The Kruskal Wallis analysis revealed highest positive rank sum (107) for the digger. Overall, farmers’ ranked BD digger as best performing. The financial analysis indicated that BD digger has a net benefit advantage of ETB 522 in one harvesting season from a quarter hectare of land. Thus, it is important to promote the technology as a means of post harvest loss reduction.
Abstract: The post harvest loss of potato in Ethiopia is more than 25% which includes harvesting loss. To minimize the harvesting loss, providing appropriate equipment (technology) is essential. As a result, a study was carried out to develop and select suitable potato digger for small holder potato producers. Comparisons were conducted on three types of pot...
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Quality Requirements and Conformity of Welded Products in the Manufacturing Chain in Welding Network
Jenni Toivanen,
Paul Kah,
Jukka Martikainen
Issue:
Volume 3, Issue 6, December 2015
Pages:
109-119
Received:
2 October 2015
Accepted:
15 October 2015
Published:
30 October 2015
Abstract: The objective of this study is to examine the manufacturing and conformity of welded products and the significance of co-operation of different functions to welding quality. This study focuses on costs arising from nonconformity from the manufacturing perspective. It briefly discusses unnecessary costs, claim costs and warranty costs in the production chain. It furthermore takes an overview of challenges in welding manufacturing in the engineering field with empirical research in the industry and shows that failures and defects are identifiable and known in companies but very rarely the root cause of imperfections is investigated. The requirements from manufacturing go unrecognized at the many levels of organisation. One of the main obstacles to improving welding functions is the lack of co-operation and knowledge of the demands on welding. This can cause continuous nonconformity in products and in welding manufacturing. The observations have been collected from welding networks in engineering workshops where GMAW welding is a commonly used process. The results provide a framework for future research to define the importance of actions of different functions to the quality and costs of manufacturing.
Abstract: The objective of this study is to examine the manufacturing and conformity of welded products and the significance of co-operation of different functions to welding quality. This study focuses on costs arising from nonconformity from the manufacturing perspective. It briefly discusses unnecessary costs, claim costs and warranty costs in the product...
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Development Research of a New Welding Manufacturing Quality Control and Management System (Case: China)
Xiaochen Yang,
Paul Kah,
Jukka Martikainen
Issue:
Volume 3, Issue 6, December 2015
Pages:
120-126
Received:
30 November 2015
Accepted:
7 December 2015
Published:
18 December 2015
Abstract: The Chinese welding industry is growing every year. Companies around the world are looking to use Chinese enterprises as their cooperation partners. However, the Chinese welding industry also has relatively low quality and weak management system. A modern, advanced welding management system appropriate for local socio-economic conditions is required to enable Chinese enterprises to enhance further their business development. This article designed and implemented a new welding quality management system in China. This new system is called ‘welding production quality control management model system in China’ (WQMC). Constructed on the basis of surveys and in-company interviews, the welding management system comprises the following different elements and perspectives: a ‘Localized congenital existing problem resolution strategies ’ (LCEPRS) database, a ‘human factor designed training system’ (HFDT) training strategy, the theory of modular design, ISO 3834 requirements, total welding management (TWM), and lean manufacturing (LEAN) theory. The paper also describes the design and implementation of a HFDT strategy in Chinese welding companies. Such training is an effective way to increase employees’ awareness of quality and issues associated with quality assurance. The study identified widely existing problems in the Chinese welding industry and constructed a LCEPRS database that can be used to mitigate and avoid common problems. The work uses the theory of modular design, and TWM as tools for the implementation of the WQMC system. Analysis of the WQMC system effects indicates that its adoption has resulted in improved quality and reduced costs.
Abstract: The Chinese welding industry is growing every year. Companies around the world are looking to use Chinese enterprises as their cooperation partners. However, the Chinese welding industry also has relatively low quality and weak management system. A modern, advanced welding management system appropriate for local socio-economic conditions is require...
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Analysis of Chinese Welding Industries Today and in the Future (Focus on Cost, Productivity, and Quality)
Xiaochen Yang,
Paul Kah,
Jukka Martikainen
Issue:
Volume 3, Issue 6, December 2015
Pages:
127-133
Received:
1 December 2015
Accepted:
8 December 2015
Published:
21 December 2015
Abstract: This paper make a detailed survey and research about the real situation about Chinese welding industry, and the future cooperation suggestion between Finland and China in this area. This topic was approached by searching for the latest and most accurate information through interviews, site visits, websites, books and promotional materials. The site visits are the most important. The destination cities in China cover a large range from northern to the southwestern areas in China. More than 15 professional welding factories or factories which have a welding workshop were visited, and based on discussions and an investigation in those factories; detailed and reliable data was collected. By using and analyzing that information, a general profile of modern Chinese welding factories was generated.
Abstract: This paper make a detailed survey and research about the real situation about Chinese welding industry, and the future cooperation suggestion between Finland and China in this area. This topic was approached by searching for the latest and most accurate information through interviews, site visits, websites, books and promotional materials. The site...
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