Evaluation of Surface Degradation of Deoxidized AW-AlMg0.7Si Alloy

2017 ◽  
Vol 270 ◽  
pp. 136-141
Author(s):  
Miroslava Horynová ◽  
Michaela Remešová ◽  
Lenka Klakurková ◽  
Martin Juliš ◽  
Pavel Gejdoš ◽  
...  
Keyword(s):  
Surface Quality ◽  
Atmospheric Corrosion ◽  
Industrial Area ◽  
Surface Cleaning ◽  
Initial Surface ◽  
Industrial Practice ◽  
Chemical Surface ◽  
Final Surface ◽  
Key Factor

Corrosion of aluminium alloys due to chlorides is not rare in industrial practice. When detected, it is necessary to decide whether and how to remove the corroded areas and also to find the appropriate method for protection against further degradation. Appearance and quality of final surface is key factor in such cases. This study deals with final surface quality of aluminium alloy components and the extent of degradation after corrosion attack and subsequent chemical surface cleaning. Two AW-AlMg0.7Si alloy pipes, fabricated by two individual producers, were analyzed in order to reveal extent of atmospheric corrosion after the storage in the industrial area. Further analysis evaluated the influence of such degradation on final surface quality after surface cleaning by chemical way, using two different methods, namely deoxidizing and subsequent passivation. Special attention was paid to the influence of initial surface roughness on quality of final surface.

Analysis of the Assembly Joint at Deformation of Matched Objects

2019 ◽  
Vol 952 ◽  
pp. 330-338
Author(s):  
Marcela Bučányová ◽  
Miriam Matúšová ◽  
Erika Hrušková
Keyword(s):  
Surface Quality ◽  
Specific Activity ◽  
Technological Equipment ◽  
Time Performance ◽  
Final Surface ◽  
The Impact ◽  
Material Tool

Maintenance is a system-specific activity that the purpose of which is to maintain or to increase time, performance and quality of machines and equipment use. The demand for technological equipment is still rising, resulting in often complicated and lengthy repairs. It is necessary to analyze the tools used in the construction of assembly joints and to describe the deficiencies that may occur during assembly. When contacting a material tool using a particular technology and assembly, it is necessary to analyze the impact on the final surface quality of the material.

Comparison of Experimental Stamping Punch Machinability Made out of Unconventional Materials

2014 ◽  
Vol 635 ◽  
pp. 81-84
Author(s):  
Peter Ižol ◽  
Dagmar Draganovská ◽  
Juraj Hudák ◽  
Miroslav Tomáš ◽  
Jozef Beňo
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Experimental Work ◽  
Roughness Parameters ◽  
Scallop Height ◽  
Shaped Surface ◽  
Final Surface ◽  
Surface Roughness Parameters ◽  
Cam Software

The paper describes experimental stamping punch production from the view machinability and quality of stamping punch active surfaces. The tin car-body stamping punch has been chosen as a subject of experimental work. Two unconventional materials such as Textit J and Fibroflex 5 have been chosen for stamping punch. Milling strategies have been proposed, optimized and verified using CAM software SolidCAM considering the maximum Scallop Height. The final surface quality on selected areas of stamping punch shaped surface has been evaluated by surface roughness parameters Ra and Rz. These have been compared to Scallop Height set in CAM software. Manufactured areas on shaped surface were optically evaluated as well.

Physico-Chemical Assessment of Groundwater Quality of Ahmednagar Industrial Area

2011 ◽  
Vol 4 (4) ◽  
pp. 228-230
Author(s):  
Patil S.S Patil S.S ◽  
◽  
Gandhe H.D Gandhe H.D ◽  
Ghorade I.B Ghorade I.B
Keyword(s):  
Groundwater Quality ◽  
Industrial Area ◽  
Physico Chemical ◽  
Chemical Assessment

Schwingungsüberlagertes Axialformen/Superimposed Oscillated Axial Forming

2020 ◽  
Vol 110 (11-12) ◽  
pp. 838-843
Author(s):  
Philipp Müller ◽  
Bernd-Arno Behrens ◽  
Sven Hübner ◽  
Hendrik Vogt ◽  
Daniel Rosenbusch ◽  
...  
Keyword(s):  
Surface Quality ◽  
Economic Importance ◽  
Combined Effect ◽  
Wird Eine ◽  
Forming Force ◽  
Forming Process ◽  
Forming Technology ◽  
Great Economic Importance ◽  
Gear Geometry

Techniken zur Steigerung der Formgebungsgrenzen in der Umformtechnik sind von hoher wirtschaftlicher Bedeutung. In dieser Arbeit wird eine Schwingungsüberlagerung im Krafthauptfluss eines Axialformprozesses zur Ausprägung einer Verzahnungsgeometrie untersucht. Die Auswirkungen der Schwingung auf die erzielbare Ausfüllung der Zahnkavitäten werden analysiert sowie die Parameter Schmierung und Oberflächengüte der Halbzeuge in ihrer kombinierten Wirkung untersucht. Es konnte eine Reduzierung der mittleren Umformkraft sowie eine Erhöhung der Formfüllung festgestellt werden. Techniques for extending the production limits in forming technology are of great economic importance. In this research, a superimposed oscillation in the main force flow of an axial forming process to form an axial gear geometry is investigated. The effects of the superimposed oscillation on the achievable form-filling of the tooth cavities are analyzed and the parameters lubrication and surface quality of the semi-finished products are investigated in their combined effect. A reduction of the averaged forming force as well as an increase of the form-filling could be achieved.

Impacts of Vending Practices on the Microbiological Quality of Bread in the Ojoo Area of Ibadan, Oyo-State, Nigeria

2019 ◽  
Vol 15 (1) ◽  
pp. 31-39
Author(s):  
Oluwadara Oluwaseun Alegbeleye ◽  
Wasiu Akinloye Oyebisi Afolabi ◽  
Beatrice Oluwatoyin Opeolu ◽  
Amin Mousavi Khaneghah
Keyword(s):  
Food Safety ◽  
Microbiological Quality ◽  
Bacillus Species ◽  
Potential Hazard ◽  
Safety Regulations ◽  
Bacillus Flexus ◽  
Microbiological Methods ◽  
Key Factor ◽  
Quality Of Food

Background: Bacterial counts in ready-to-eat foods are a key factor in assessing the microbiological quality and safety of food. Periodic assessment of the microbiological quality of food is necessary to develop a robust database and help to ensure food safety. </P><P> Methods: The bacterial contamination of a total of 336 bread samples collected from two bakeries and 10 vendors in Ojoo Area of Ibadan, Oyo-State, Nigeria (December 2014 -June 2015) was evaluated. The microbiological quality of the bread loaves was investigated using standard microbiological methods (morphological, phenotypic and molecular characterization). </P><P> Results: The results showed that the number of contaminated samples among the vended bread samples was higher than the bakery bread samples and can be summarized as Bacillus megaterium (4.30%), Staphylococcus arlettae (0.005%), Staphylococcus saprophyticus (2.78%), Citrobacter freundii (2.40%), Bacillus flexus (1.64%), Bacillus species (49.59%), Pseudomonas aeruginosa (4.12%), Pseudomonas fluorescens (0.92%), Pseudomonas species (0.045%), Escherichia coli (30.44%) Klebsiella sp. (0.040%) and Aeromonas hydrophila (3.72%). </P><P> Conclusion: The findings demonstrate that the bread samples which become contaminated after transport and handling can be considered a potential hazard to human health in the area. More stringent adherence to food safety regulations should be encouraged and enforced by the appropriate authorities. The findings of this study may be adopted to improve the hygienic conditions of bread distribution chain in the area as well as in other regions of the World.

Correlation of Altmetric Attention Scores with Citations in Major Pharmacy Journals (Preprint)

2018 ◽  
Author(s):  
Dave L Dixon ◽  
William L Baker
Keyword(s):  
Citation Count ◽  
Cross Sectional Study ◽  
Scientific Output ◽  
Cross Sectional ◽  
Promotion And Tenure ◽  
Article Type ◽  
Key Factor ◽  
Number Of Citations ◽  
The Impact

BACKGROUND The impact and quality of a faculty members publications is a key factor in promotion and tenure decisions and career advancement. Traditional measures, including citation counts and journal impact factor, have notable limitations. Since 2010, alternative metrics have been proposed as another means of assessing the impact and quality of scholarly work. The Altmetric Attention Score is an objective score frequently used to determine the immediate reach of a published work across the web, including news outlets, blogs, social media, and more. Several studies evaluating the correlation between the Altmetric Attention Score and number of citations have found mixed results and may be discipline-specific. OBJECTIVE To determine the correlation between higher Altmetric Attention Scores and citation count for journal articles published in major pharmacy journals. METHODS This cross-sectional study evaluated articles from major pharmacy journals ranked in the top 10% according to the Altmetric Attention Score. Sources of attention that determined the Altmetric Attention Score were obtained, as well each articles open access status, article type, study design, and topic. Correlation between journal characteristics, including the Altmetric Attention Score and number of citations, was assessed using the Spearman’s correlation test. A Kruskal-Wallis 1-way analysis of variance (ANOVA) was used to compare the Altmetric Attention Scores between journals. RESULTS Six major pharmacy journals were identified. A total of 1,376 articles were published in 2017 and 137 of these represented the top 10% with the highest Altmetric Attention Scores. The median Altmetric Attention Score was 19 (IQR 15-28). Twitter and Mendeley were the most common sources of attention. Over half (56.2%) of the articles were original investigations and 49.8% were either cross-sectional, qualitative, or cohort studies. No significant correlation was found between the Altmetric Attention Score and citation count (rs=0.07, P = 0.485). Mendeley was the only attention source that correlated with the number of citations (rs=0.486, P<0.001). The median Altmetric Attention Score varied widely between each journal (P<0.001). CONCLUSIONS The overall median Altmetric Attention score of 19 suggests articles published in major pharmacy journals are near the top 5% of all scientific output. However, we found no correlation between the Altmetric Attention Score and number of citations for articles published in major pharmacy journals in the year 2017.

scholarly journals Promoting Sustainable Mobility: A Perspective from Car and Public Transport Users

2021 ◽  
Vol 18 (9) ◽  
pp. 4715
Author(s):  
Audrius Dėdelė ◽  
Auksė Miškinytė
Keyword(s):  
Public Transport ◽  
Adult Population ◽  
Individual Characteristics ◽  
Urban Mobility ◽  
Sustainable Mobility ◽  
Bicycle Safety ◽  
Key Factor ◽  
The Individual ◽  
Significant Factors

Sustainable mobility is becoming a key factor in improving the quality of life of the residents and increasing physical activity (PA) levels. The current situation of sustainable mobility and its analysis is a first step in understanding the factors that would encourage residents to discover and choose alternative modes of travel. The present study examined the factors that encourage the choice of active modes of travel among urban adult population. Walking and cycling were analyzed as the most sustainable forms of urban mobility from the perspective of car and public transport (PT) users. Total of 902 subjects aged 18 years or older were analyzed in the study to assess commuting habits in Kaunas city, Lithuania. The majority (61.1%) of the respondents used a passenger vehicle, 28.2% used PT, and only 13.5% used active modes of travel. The results showed that safer pedestrian crossings, and comfortable paths were the most significant factors that encourage walking. A wider cycling network, and bicycle safety were the most important incentives for the promotion of cycling. Our findings show that the main factors encouraging walking and cycling among car and PT users are similar, however, the individual characteristics that determine the choice of these factors vary significantly.

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