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| 2. |
- Ramirez-Tannus, M. C., et al.
(författare)
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Massive pre-main-sequence stars in M17
- 2017
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 604
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Tidskriftsartikel (refereegranskat)abstract
- The formation process of massive stars is still poorly understood. Massive young stellar objects (mYSOs) are deeply embedded in their parental clouds; these objects are rare, and thus typically distant, and their reddened spectra usually preclude the determination of their photospheric parameters. M17 is one of the best-studied H i i regions in the sky, is relatively nearby, and hosts a young stellar population. We have obtained optical to near-infrared spectra of previously identified candidate mYSOs and a few OB stars in this region with X-shooter on the ESO Very Large Telescope. The large wavelength coverage enables a detailed spectroscopic analysis of the photospheres and circumstellar disks of these candidate mYSOs. We confirm the pre-main-sequence (PMS) nature of six of the stars and characterise the O stars. The PMS stars have radii that are consistent with being contracting towards the main sequence and are surrounded by a remnant accretion disk. The observed infrared excess and the double-peaked emission lines provide an opportunity to measure structured velocity profiles in the disks. We compare the observed properties of this unique sample of young massive stars with evolutionary tracks of massive protostars and propose that these mYSOs near the western edge of the H i i region are on their way to become main-sequence stars (similar to 6-20 M-circle dot) after having undergone high mass accretion rates ((M) over dot(acc) similar to 10(-4)-10(3) M-circle dot yr(-1)). Their spin distribution upon arrival at the zero age main-sequence is consistent with that observed for young B stars, assuming conservation of angular momentum and homologous contraction.
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| 3. |
- Ramis, Borja, et al.
(författare)
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Knowledge-based web service integration for industrial automation
- 2014
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Ingår i: 12th IEEE International Conference on Industrial Informatics, INDIN 2014. - Piscataway, NJ : IEEE Communications Society. - 9781479949052 ; , s. 733-739
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Konferensbidrag (refereegranskat)abstract
- Web services are widely used for enterprise software development. Web service protocols simplify application integration thanks to interface description that can be processed at runtime and, in addition, due to mature and widely used standards for transportation and internetworking. Implementation of service-oriented architecture starts to get acceptance in the field of industrial automation ranging from international research project to the first implementations in industry including first commercial controller devices supporting web service communication protocols and executing deterministic control at the same time. The current research step is to allow knowledge-based integration of industrial automation systems and to exploit full potentials of run-time reconfiguration and adaptation of industrial systems. This paper demonstrates implementation of knowledge-based industrial system, the architecture and ontology model that can be generalized for implementation of other production systems.
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- Ramji, Rathi, et al.
(författare)
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Development and evaluation of a physical activity intervention informed by participatory research : a feasibility study
- 2020
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Ingår i: BMC Public Health. - : BioMed Central. - 1471-2458. ; 20
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Tidskriftsartikel (refereegranskat)abstract
- Background: Despite numerous interventions aiming to improve physical activity in socially disadvantagedpopulations, physical inactivity remains to be a rising challenge to public health globally, as well as, in Sweden. Inan effort to address this challenge, a community-based participatory intervention was developed through activecommunity engagement and implemented in a socially disadvantaged neighborhood in Sweden. The current studyaims to present the development and initial evaluation of a participatory research driven physical activityintervention.Methods: Fifteen participants (11 females and 4 males) aged 17–59 years volunteered to participate in the physicalactivity intervention program. The intervention program was evaluated using a longitudinal mixed methods designmeasuring health impact changes over time through focus group discussions and quality of life surveys. Furtheradditional biomedical health parameters such as levels of glycosylated hemoglobin, blood pressure, levels ofoxygen saturation and body mass index were monitored before and after the intervention. Focus group data wereanalyzed using content analysis with an inductive approach. The pre-and post-test scores from the survey-basedquality of life domains, as well as the health parameters were compared using non-parametric and parametricstatistics.Results: Four themes emerged from the analysis of the focus group discussions including sense of fellowship,striving for inclusion and equity, changing the learner perspective and health beyond illness. The scores for thedomains Physical Health, Psychological Health, Social Relationships and Health Satisfaction where significantlyhigher after participation in the physical activity intervention program compared to the pre-test scores (p < .05)s.There were however, no significant changes in the scores for the environmental domain and overall quality of lifeafter intervention compared to that prior to intervention start. Overall, the biomedical health parameters remainedstable within the normal ranges during intervention.Conclusion: The focus group discussions and results from the surveys and biomedical measures reveal importantfindings to understand and further develop the intervention program to promote health equity among citizens indisadvantaged areas. Evaluating the feasibility of such an intervention using multiple approaches contributes toeffective implementation of it for larger communities in need.
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| 5. |
- Ramji, Rathi, et al.
(författare)
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Health and quality of life among women after participation in a CBPR-informed physical activity intervention : with a pandemic perspective.
- 2023
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Ingår i: Scientific Reports. - : Springer Nature. - 2045-2322. ; 13:1
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Tidskriftsartikel (refereegranskat)abstract
- The lack of culturally and contextually oriented interventions promoting physical activity (PA) has led to increased physical inactivity among women living in disadvantaged neighbourhoods in Sweden. In this study one such intervention informed by community-based participatory research (CBPR) has been evaluated among 34 women from a disadvantaged neighbourhood before and during COVID-19. Health-related quality of life (HRQOL), behavioural and biomedical outcomes were assessed directly prior and post-intervention, followed by evaluations at 6-months and 18-months follow-up during COVID-19. The results revealed that HRQOL, particularly psychological, social, and environmental health significantly increased post-intervention compared to prior to intervention but reversed back at 6-months follow-up. Perceived health satisfaction and environmental health increased at 18-months follow-up during COVID-19. Participation in PA improved post-intervention and at 6-months follow-up. Everyday activities and fruit and vegetable intake continued to increase through all timepoints. Systolic blood pressure significantly decreased post-intervention and 6-months follow-up; blood flow rate increased significantly at all timepoints. Overall, the findings underscores the potential effectiveness of CBPR approaches in promoting and sustaining healthy lifestyles, even during acute situations such as the COVID-19. It may even serve as a future model for promoting health and addressing health disparities in similar groups.
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| 6. |
- Ramji, Rathi, et al.
(författare)
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Waterpipe use in adolescents in Northern Sweden : Association with mental well-being and risk and health behaviours
- 2018
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Ingår i: Scandinavian Journal of Public Health. - : Sage Publications. - 1403-4948 .- 1651-1905. ; 46:8, s. 867-876
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Tidskriftsartikel (refereegranskat)abstract
- AIMS: There is a lack of studies examining the association between waterpipe smoking and mental well-being among adolescents. This study sought to determine whether waterpipe smoking is associated with mental well-being and other risk and health behaviours in adolescents.METHODS: A questionnaire was distributed to 1006 adolescents in grades 9-12 (with a response rate of >95%), containing questions on measures of stress, mental energy and sleep. In addition, the questionnaire assessed risk and health behaviours, including use of a waterpipe, cigarettes, e-cigarettes, snus, alcohol, narcotics, gambling and exercise. Logistic regression was used to assess factors associated with waterpipe use.RESULTS: Thirty-seven per cent ( n=371) of the participants had used a waterpipe at some point. Waterpipe use was associated with lower mental energy (odds ratio [OR] = 0.90, 95% confidence interval [CI] 0.81-0.99), higher stress (OR = 1.10, 95% CI 1.02-1.20) and use of cigarettes (OR = 3.82, 95% CI 2.33-6.03), e-cigarettes (OR = 3.26, 95% CI 2.12-4.99), snus (OR = 2.29, 95% CI 2.12-4.99), alcohol (OR = 1.92, 95% CI 1.07-3.44) and narcotics (OR = 3.64, 95% CI 1.75-7.58). Waterpipe use was not significantly associated with gambling, exercise or sleep quality.CONCLUSIONS: Waterpipe use in adolescents is associated with worse mental well-being, as well as use of other nicotine products, alcohol and narcotics. Prospective studies are needed to delineate causal and temporal relationships further between waterpipe use and mental well-being and its relationship to other risky behaviours in order to design effective prevention programs.
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