Search results

Parts created with fused deposition modelling (FDM) have poor surface quality and dimensional accuracy, which limits their applicability in a variety of applications. Therefore, post process of FDM parts seems to be essential to tackle these problems. The purpose of this study is to study the influence of lapping parameters (time, weight and angular velocity) on the surface roughness, material removal rate (MRR) and flexural strength of acrylonitrile butadiene styrene (ABS) parts manufactured by FDM were post processed with the aid of lapping operation.

After printing the specimens, parts were lapped according to the Taguchi design of experiments. The surface roughness of the lapped parts was then evaluated by using laser profilometry, and the results were compared to study how lapping parameters affected surface roughness. A digital microscope was used to examine the surface damage of components that were being lapped. After that, the flexural strength of lapped parts was compared with the untreated part to study the effect of lapping process on the flexural strength. Finally, the influence of lapping parameters was investigated on the thickness change and MRR.

The results showed that while by increasing lapping time the surface roughness would improve; angular velocity and weight have an optimal value. The results also illustrated that not only the surface roughness of all ABS samples improve significantly but also the antistrophic behaviour of additively manufactured parts is turned to isotropic behaviour without decreasing flexural strength of specimens. MRR is also proportional to these parameters and by rising the value of them, MRR will increase.

The previous techniques of improving surface roughness whether chemical treatment or mechanical treatment had some disadvantages such as reducing mechanical properties, cost, long time of the process and so forth. As a result, finding a new approach such as lapping process to overcome the problems of previous methods seems to be necessary.

The purpose of the research was to determine food consumer behaviour and attitudes towards food consumption and household food waste in Montenegro. Since the period of conducting the research coincided with the expansion of the coronavirus disease 2019 (COVID-19) pandemic in Montenegro (10–14 weeks since its outbreak), the results of this research could indicate the emerging pandemic circumstances.

A total of 529 consumers were surveyed online, and 514 questionnaires met the requirements of further statistical processing. Data were processed by methods of descriptive statistics and chi-square test of association between socio-economic characteristics of respondents and their attitudes, as well as cluster analysis.

The main findings of the research are (1) consumers in Montenegro are quite responsible for the use of food because they throw away a small part, both in quantity and value; (2) Montenegrin households still practice a traditional way of life with frequent preparation and consumption of food at home and use of leftovers; (3) consumers have confusing perceptions regarding date labels of industrially processed foods; (4) during the COVID-19 pandemic, 17.3% of consumers increased and 11.8% decreased the frequency of food purchases, while 20.7% increased and 5.1% decreased food waste.

The work is highly original and, to the best of the authors’ knowledge, there is no other article that analysed the effects of the COVID-19 pandemic on food wastage and food-related behaviours during the outbreak of the pandemic in Montenegro (May–June 2020). Therefore, the work fills a gap in research and knowledge and sets a baseline for future studies.

The purpose of this paper is to assess the quality of Iranian university libraries.

This first systematic review and meta-analysis were based on the PRISMA guidelines by searching in national and international databases from 2003 to January 2017 with standard Persian and English keywords. Data searching, extracting and quality appraising were completed by two researchers, independently. Any unexpected documents were assessed by a third expert researcher. Data were extracted in accordance with the “Strength of the Reporting of Observational Studies in Epidemiology” checklist after the final selection of appraised documents. Random effects size based on Cochrane test and I² were used for combining the obtained results from different studies together by considering the heterogeneity of studies.

Based on the meta-analysis conducted in 25 (6.42 percent) included studies, the total sample size was estimated. According to three dimensions of LibQUAL, findings of current information control, affect of service and the library as a place were estimated as 5.37 [CI95%: 5.02, 5.73], 6.91 [CI95%: 5.56, 6.26], and 5.46 percent [CI95%: 5.2, 5.73], respectively. Also, mean of service adequacy and superiority gap are equal to 0.07 [CI95%: −0.22, 0.36] and −2.06 [CI95%: −2.89, −1.23], respectively. There was a significant correlation between three dimensions of service quality and service superiority gap of LibQUAL and geographical regions of Iran (p<0.01). Also, a significant correlation was found between the gaps of services and three aspects of LibQUAL model and published years through a meta-regression test (p<0.01).

The results obtained from the present study showed that users are relatively satisfied with the quality of services provided by Iranian university libraries. An improvement in the quality of library services can promote the scientific level of universities.

The results of the present systematic review and meta-analysis study demonstrate a vital connection between primary research studies and decision-making for policymakers in Iranian university libraries to increase quality services.

Hospital responsiveness to the patient expectations of non-medical aspect of care can lead to patient satisfaction. The purpose of this paper is to investigate the relationship between the eight dimensions of responsiveness and overall patient satisfaction in public and private hospitals in Tehran, Iran.

This cross-sectional study was conducted in 2015. In all, 500 patients were selected by the convenient sampling method from two public and three private hospitals. All data were collected using a valid and reliable questionnaire consisted of 32 items to assess the responsiveness of hospitals across eight dimensions and four items to assess the level of overall patient satisfaction. Data analysis was performed using descriptive statistics and multivariate regression was performed by SPSS 18.

The mean score of hospital responsiveness and patient satisfaction was 3.48±0.69 and 3.54±0.97 out of 5, respectively. Based on the regression analysis, around 65 percent of the variance in overall satisfaction can be explained by dimensions of responsiveness. Seven independent variables had a positive impact on patient satisfaction; the quality of basic amenities and respect for human dignity were the most powerful factors influencing overall patient satisfaction.

Hospital responsiveness had a strong effect on overall patient satisfaction. Health care facilities should consider including efforts to responsiveness improvement in their strategic plans. It is recommended that patients should be involved in their treatment processes and have the right to choose their physician.