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[en] Fractal and self similarity of complex networks have attracted much attention in recent years. The fractal dimension is a useful method to describe the fractal property of networks. However, the fractal features of mobile social networks (MSNs) are inadequately investigated. In this work, a box-covering method based on the ratio of excluded mass to closeness centrality is presented to investigate the fractal feature of MSNs. Using this method, we find that some MSNs are fractal at different time intervals. Our simulation results indicate that the proposed method is available for analyzing the fractal property of MSNs. (paper)
[en] In reviewing the literature and industry reports, a number of organizations have approached KM metrics from a Balanced Scorecard, Intellectual Capital (e.g., Skandia’s Intellectual Capital Navigator), Activity-Based Costing, or other borrowed approaches from the accounting and human resources disciplines. Liebowitz in his edited book, Making Cents Out of Knowledge Management (Scarecrow Press, 2008), shows case studies of organizations trying to measure knowledge management success. A few methodologies have examined ways to measure return on knowledge, such as Housel and Bell’s Knowledge Value-Added (KVA) methodology (Housel and Bell, 2001). Liebowitz analysed over 80 publications on knowledge management metrics, whereby KM metrics can be divided into system measures, output measures, and outcome measures. (author)
[en] We apply the idea of dynamical network markers (Chen et al 2012 Sci. Rep. 2 342) to foreign exchange markets so that early warning signals can be provided for any abrupt changes. The dynamical network marker constructed achieves a high odds ratio for forecasting these sudden changes. In addition, we also extend the notion of the dynamical network marker by using recurrence plots so that the notion can be applied to delay coordinates and point processes. Thus, the dynamical network marker is useful in a variety of contexts in science, technology, and society. (paper)
[en] Providing indigenous communities with electricity services requires an understanding of preferences to ensure that electrification schemes are congruent with the communities’ specific development pathways. We contribute to the literature by using a choice experiment to rank and quantify household preferences for electricity services in two indigenous villages in Sarawak, Malaysia. Specifically, we disaggregated electricity services into five attributes: private use for household appliances and lighting, public use for community facilities, productive use for income generation, the operator model and the monthly tariff. We found that the most value was placed on the operator-model underpinning the provision of electricity services and that there was a strong preference for a community-based model over a utility-based model. Interestingly, our results suggest that the preference for a community-based operator model may be related to the experience of using electricity for productive uses. We contend that our results demonstrate the importance of social and institutional challenges to providing electricity services to indigenous communities in Sarawak and highlight the need for the state utility to engage with indigenous communities to overcome these challenges. - Highlights: • We quantify indigenous community preferences for electricity services. • Our results demonstrate the social and institutional challenges in Sarawak. • Suggest the need for the state utility to engage with indigenous communities.
[en] This study aimed to investigate influence of multiple sociodemographic characteristics on the patient satisfaction levels in outpatient public and private dental practices of Riyadh, Saudi Arabia. Methods: Questionnaire-based survey data were collected from 500 patients, 250 each from the public and private dental clinics of Riyadh, Saudi Arabia from September to December, 2017. Questions related to demographic factors and service attributes were included. A Likert scale of 5 points was used to measure satisfaction levels. Data was analyzed to calculate the descriptive and inferential statistics (analysis of variance and multiple regression analysis) to find the statistical difference (p < 0.01). Results: Satisfaction level differed significantly by education level (P < 0.001) and the type of clinic(P<0.001). The multiple regression analysis suggest that all variables influenced satisfaction, except age and marital status. The satisfaction score was higher by 27% for private clinics compared to public clinics. Conclusion: This study was exploratory and revealed an effect of individual variables on overall satisfaction score of the services attributes. Future plans for patient care could be developed with the help of this research. (author)
[en] To find the perceived stress level and monetary burden in the thalassemia patients and their caregivers related to thalassemia treatment sessions. Methods: A descriptive cross sectional study was conducted at Rawalpindi Thalassemia Centre and Military Hospital Rawalpindi of six months’ duration from November 2016 to April 2017. A total of 87 sample size was calculated by using WHO sample size calculator. Participants were inducted through purposive sampling technique from thalassemia centers. A validated standardized Cohen’s Perceived Stress score was used. Data were entered and analyzed in SPSS 22. Results: Mean age of the participants was 30.42 ± 14.53 years. There were 30 (34.2%) males and 57 (65.8%) females. There were 39 (51.3%) patients and 48 (48.7%) caregivers. The mean income per month of the participants was 48706.9 ± 39492.68 PKR. The mean total expenditure per treatment session was 48706 ± 4037.12 PKR. Among the patients, there were 15 (38.5%) who were having average stress, while 4 (10.3%) were having moderate stress while 45 (51.7%0 were having severe stress. Among the caregivers, 10 (20.8%) were having mild stress, 13 (27.1%) were having moderate stress while 25 (52.1%) were having severe stress. The stress among the two groups was not statistically significant (p=0.066). Conclusion: More than half of the patients and caregivers were having a high perceived stress levels and there was a significant association between the two groups. The monetary burden was a lot to bear by the patients and the cost of treatment session most expensive. (author)
[en] This study focuses on the preference for and consumption habits of blueberries (Vaccinium corymbosum L.) in an emerging market. The objective is to analyze the determinants of blueberry consumption in Chile and evaluate to what extent traditional factors, such as income and price, are more determinant than other attitudinal factors and lifestyles. The Biobío Region (Chillán City), the second most important region in Chile. A face-to-face survey is applied to a random stratified sample. The survey collected information on adoption of healthy lifestyles, knowledge of blueberries as a natural functional food, some sociodemographic characteristics, and traditional economic factors. A Heckman model is estimated by the Maximum Likelihood. Results suggest that higher blueberry consumption is positively associated with the adoption of healthy lifestyles, a higher self-perception of healthy habits, and the recognition of blueberries as a natural functional food. The nutritional status reflected that people with a lower body mass index consume fewer blueberries. Finally, traditional factors, such as income and price, are showed to be more influential on blueberry consumption than attitudinal and lifestyle factors.Chilean consumers perceive blueberries as a healthy product, which can contribute to adopt healthier lifestyles. Domestic markets should be supplied with higher quality product taking into account that the demand is price inelastic. Branding and packaging with functional claims could be an efficient strategy to increase domestic consumption.
[en] This study analysed spatial and temporal changes in protected landscape of Ślęża Landscape Park in Poland, covering an area of 7724 ha. The main objective was to determine level of landscape change of the research area after Polish accession to European Union by comparing land-cover maps from 2004, 2009 and 2014. With the use of prepared land cover maps, we developed a database of the surface of the main elements constituting the background landscape of the research area. The data obtained made it feasible to assess the level of change in two different periods of time (2004 - 2009 and 2009 - 2014) by means of the landscape change index (LCI). This indicator is described by one value which is the result of all the change types taking place in the background landscape in a given period of time. Comparing the index of different parts of Ślęża Landscape Park helped to identify areas where the landscape changes were the highest and areas where the changes were hardly noticeable. The results show that when we take into account whole research area landscape changes are much more intense in the second of the analysed periods of time (2009 - 2014) (LCI=1,91) then in years 2004 - 2009 (LCI=0,71). The same analysis was done for each part of municipalities located within the Park. This made it possible to determine which part of the park is the most threatened by spatial transformations. In this context, it should be emphasized that the highest rates of landscape changes were recorded in the municipalities where the largest new residential area was located – in the municipalities Sobótka and Łagiewniki. Whereas municipality Dzierżoniów with a high percentage of forests inside the Park and unchanging area of arable land have the lowest landscape change index. (paper)