Selective soldering is the process of soldering components to printed circuit boards that could not be treated in a reflow oven in a traditional surface-mount technology process due to thermal shock and damaging. Process of flux appliance as a first step of the selective soldering process sets the baseline for achieving high quality and robustness of the soldered joints.
Purpose of this research is to identify the factors that directly influence the effectiveness of the fluxing process in selective soldering machines, using the design of experiment methodology with associated factors and levels used in the experiment. Final findings gives directions for set up of the optimal fluxing parameters that will enable appropriate flux appliance and to gain reduction of soldering quality issues which foundations are from this process.
Purpose: The purpose of this paper is to promote the integration of sustainable development concepts and conceptual models in engineering research, and therefore, to enhance sustainability of research models. Particularly, the concepts are integrated with an integrated theoretical model of knowledge management and DMAIC (Define-Measure-Analysis-Improve-Control) process.
Methodology: Based on literature, the key concepts of sustainable development, knowledge management, Ontology and DMAIC methodology have been reviewed. A theoretical combination of knowledge management, ontology engineering, and DMAIC methodology is to aim at accumulating and reusing a potential economic resource, knowledge resource. An analysis of sustainable aspects of a proposed model is presented.
Important findings: As literature expressed that knowledge created by every step of a DMAIC process can be accumulated and reused by using Ontology in a conceptual model. Furthermore, sustainable aspects of the model such as economy, environment and society are identified.
Conclusion: DMAIC knowledge is a potential economic resource that should be shared and reused using Ontology engineering in order to archive sustainable development of DMAIC process. Theoretical integration of seven sustainable measures with activities of knowledge management is possible and realizable.
The process of quality management consists of several stages defined by specific verbs. Some experts have named the stages after the following verbs[1,2,3]: to forecast and to plan, to organize, to direct, to control (Fayol), to plan, to do, to check, to act (Deming); to design, to implement, to manufacture, to deliver; to design, to supply, to control, to assess; to develop, to inspect, to control, to improve or to enhance; to establish quality policies and quality objectives, to establish strategies for quality planning, to determine strategies for quality control, to establish quality assurance policies, to establish policies in the field of quality improvement. In this work we will show that a model of improving the quality management process could be defined starting from the following verbs: to identify needs, to program, to construct, to verify. We will also define a new quality indicator in the Oprean-Bucur model. We applied the models for a course of the Faculty of Engineering from Sibiu, Romania.
The basic requirements for human health and life quality improvement are wholeness, variety and moderation in food choices. In industrial countries the numbers of adipose inhabitants is constantly growing. People consume insufficiently vegetables, fruits and fish. The missing nutrients must be augmented with the help of functional foodstuffs. The objective of the study was to compare the impact of food supplements and local products rich in fibre and polyunsaturated fatty acids on the human body. The research was conducted at the Rîga Heart Consulting Room in 2010. For two months, 60 volunteers in three groups: using the food supplement “Wellness” in their diet (Wellness group), or Jerusalem artichoke (Helianthus tuberosus L.) and linseeds (Linum usitatissimum L.) (Nature group) and Control group were monitored. The participants’ weight, girth, amount of glucose and level of cholesterol were measured by standard methods. Data acquired were analysed using Microsoft Excel and SPSS (level of significance P < 0.05). The cholesterol level was reduced by 14% in the Nature Group. Glucose normalised to 5.8 mmol/l. Weight of participants was reduced by 2 to 7 kg. The results show that by enriching the daily diet with food supplements, both as natural products and as a special complex, it is possible to reduce body weight, reduce cholesterol and glucose levels in the blood, and reduce the risks of obesity and coronary heart disease.
Gražina Statkevičiūtė, Vilma Kemeðytė, Nijolė Lemežienė, Grigorij S. Konik and Maria Chomiak
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