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Sökning: LAR1:hig > (2015-2019)

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1.
  • 3-D band-stop FSS for X-band and Ku-band
  • 2017
  • Ingår i: 2017 Progress In Electromagnetics Research Symposium - Fall (PIERS - FALL). - : Electromagnetics Academy. - 9781538612118 - 9781538612125 ; , s. 671-675
  • Konferensbidrag (refereegranskat)abstract
    • A 3-D Frequency Selective Surface (FSS) with band-stop characteristics for X-band and Ku-band is proposed. A 3-D FSS unit cell is constructed by analyzing two 2-D FSS's. The size of the 3-D FSS unit cell is 5 mm × 5 mm wherein two layers of FR4 substrate with respective widths of 0.762 mm and 0.5 mm are used. Dual stop bands are obtained with this FSS unit cell around 10 GHz and 17.4 GHz; where a wide stop-band of 5.2 GHz is obtained. The parametric study carried out on the proposed design in terms change in nature of substrate, alternate use of different substrates and variation in angle of incidence. The 3-D FSS shows its band rejection property X-band and Ku-band respectively. Ansoft HFSS commercial EM solver software is used to carry out the simulation work.
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2.
  • A good life for all : Essays on sustainability celebrating 60 years of making life better
  • 2017. - 1
  • Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
    • For a better world now and in the futureFor a world that sustains itself for genereations to come, the University of Gävle is an ambitious and development-oriented organization with a focus on sustainability now and in the future. Under the leadership of Dr. Maj-Britt Johansson, the University is creating a sustainable community. This book commemorates her efforts in hounour of her 60th birthday.The ten essays here show the wide variety of sustainability activities under her leadership, not limited to ecological issues, includning science, social work, building design and contruction, and World Hertiage sites, along with a variety of other cutting-edge topics.
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3.
  • A wideband frequency selective surface reflector for 4G/X-Band/Ku-Band
  • 2018
  • Ingår i: Progress In Electromagnetics Research C. - : Electromagnetics Academy. - 1937-8718. ; 81, s. 151-159
  • Tidskriftsartikel (refereegranskat)abstract
    • A Frequency Selective Surface (FSS) reflector with wideband response for 4G/X-band/Ku-band is proposed. The wideband FSS reflector consists of cascaded dual-layer patch FSS which is etched on separate layers of FR4 substrate. The targeted frequency range is 5–16 GHz. A wide stopband of 10.4 GHz (100% percent bandwidth) is obtained with two layers in cascade. The Equivalent Circuit (EC) method is used to approximate the simulated results. An extensive parametric study is also carried out to understand the effect of various combinations of FSS layers and their disposition. A panel of final FSS is fabricated where measured and simulated results agree well.
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4.
  • Aasa, Ulrika, et al. (författare)
  • Personalens hälsa och arbetsmiljö
  • 2016. - 2
  • Ingår i: Prehospital akutsjukvård. - Stockholm : Liber. - 9789147114740 ; , s. 72-79
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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5.
  • Abbasi, Seyed H, et al. (författare)
  • Ethnic differences in the risk factors and severity of coronary artery disease : a patient-based study in Iran
  • 2018
  • Ingår i: Journal of Racial and Ethnic Health Disparities. - : Springer Berlin/Heidelberg. - 2197-3792 .- 2196-8837. ; 5:3, s. 623-631
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Diverse ethnic groups may differ regarding the risk factors and severity of coronary artery disease (CAD). This study sought to assess the association between ethnicity and CAD risk and severity in six major Iranian ethnic groups.Methods In this study, 20,165 documented coronary artery disease patients who underwent coronary angiography at a tertiary referral heart center were recruited. The demographic, laboratory, clinical, and risk factor data of all the patients were retrieved. The Gensini score (an indicator of CAD severity) was calculated for all, and the risk factors and severity of CAD were compared between the ethnical groups, using adjusted standardized residuals, Kruskal–Wallis test, and multivariable regression analysis.Results The mean age of the participants (14,131 [70.1%] men and 6034 [29.9%] women) was 60.7 ± 10.8 years. The Fars (8.7%) and Gilak (8.6%) ethnic groups had the highest prevalence of ≥4 simultaneous risk factors. The mean Gensini score was the highest for the Gilaks (77.1 ± 55.9) and the lowest among the Lors (67.5 ± 52.8). The multivariable regression analysis showed that the Gilaks had the worst severity (β 0.056, 95% CI 0.009 to 0.102; P = 0.018), followed by the Torks (β 0.032, 95% CI 0.005 to 0.059; P = 0.020). Meanwhile, the Lors showed the lowest severity (β −0.087, 95% CI −0.146 to −0.027; P = 0.004).Conclusions This study found that there was heterogeneity in CAD severity and a diverse distribution in its well-known traditional risk factors among major Iranian ethnic groups.
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6.
  • Abbasi, Seyed, et al. (författare)
  • Socioeconomic status and in hospital mortality of acute corony syndrome: Can education and occupation serves as preventive measures?
  • 2015
  • Ingår i: International Journal of Preventive Medicine. - : Medknow. - 2008-7802 .- 2008-8213. ; 6
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Socioeconomic status (SES) can greatly affect the clinical outcome of medical problems. We sought to assess the in‑hospital mortality of patients with the acute coronarysyndrome (ACS) according to their SES.Methods: All patients admitted to Tehran Heart Center due to 1st‑time ACS between March 2004 and August 2011 were assessed. The patients who were illiterate/lowly educated (≤5 years attained education) and were unemployed were considered low‑SES patients and those who were employed and had high educational levels (>5 years attained education) were regarded as high‑SES patients. Demographic, clinical, paraclinical, and in‑hospital medical progress data were recorded. Death during the course of hospitalization was considered the end point, and the impact of SES on in‑hospital mortality was evaluated.Results: A total of 6246 hospitalized patients (3290 low SES and 2956 high SES) were included (mean age = 60.3 ± 12.1 years, male = 2772 [44.4%]). Among them, 79 (1.26%) patients died. Univariable analysis showed a significantly higher mortality rate in the low‑SES group (1.9% vs. 0.6%; P < 0.001). After adjustment for possible cofounders, SES still showed a significant effect on the in‑hospital mortality of the ACS patients in that the high‑SES patients had a lower in‑hospital mortality rate (odds ratio: 0.304, 95% confidence interval: 0.094–0.980; P = 0.046).Conclusions: This study found that patients with low SES were at a higher risk of in‑hospital mortality due to the ACS. Furthermore, the results suggest the need for increased availability of jobs as well as improved levels of education as preventive measures to curb the unfolding deaths owing to coronary artery syndrome.
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7.
  • Abhary, Kazem, et al. (författare)
  • The application of a hybrid algorithm to roll pass design
  • 2015
  • Ingår i: The International Journal of Advanced Manufacturing Technology. - : Springer London. - 0268-3768 .- 1433-3015. ; 79:5-8, s. 1063-1070
  • Tidskriftsartikel (refereegranskat)abstract
    • Human–computer interface was utilized to amplify the power of a hybrid algorithm that combines fuzzy logic, regression analysis, and non-linear optimization to extract knowledge from a roll pass design database. This strategy is applied to grooves with vertical and horizontal symmetry which are employed in initial passes to roll a broad range of steel products. The results presented here from the case study are both statistically significant and valid from the viewpoint of roll pass design theory. © 2015, Springer-Verlag London.
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8.
  • Abid, Muhammad, 1981- (författare)
  • Global Supply Chain Design : Exploring configurational and coordination factors
  • 2015
  • Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • This thesis addresses the topic of global supply chain design. One major challenge concerns how to manage the tension between separation and integration pertaining to the localization of business activities. In this regard Ferdows (2008) worked to create two new production network models (rooted production network and footloose production network). Earlier studies have highlighted the choices that are involved in the network of facilities but lack in providing a comprehensive picture in terms of both configurational and coordination factors that govern the design of global supply chain. There is a need for a conceptual model where factors affecting the design process of a global supply chain can be applied. Two main research questions have been addressed in this study. First, exploring and identifying the factors affecting global supply chain design. Second, investigating the factors that influence the position on the spectrum of rooted and footloose supply chain design.      A literature review analysis and multi-case studies have been performed for this study in order to explore the factors. The companies were selected in order to reflect upon the two types of network, i.e., rooted and footloose. The primary data were selected through interviews with the managers.This study highlighted that there are many factors that affect configurational and coordination decision areas within a global supply chain. This study categorized the factors and the configurational/coordination decision areas with two main competitive priorities, i.e., cost and differentiation in the form of a “conceptual model.” The study also highlighted the factors in a matrix, which showed their position on the spectrum of rooted and footloose network configurations. For instance, the coordination factors that drive towards a footloose network include: high orchestration capabilities, need access to new technology and knowledge, proximity to suppliers, etc. The configurational factors that drive towards a rooted network include: economic stability, proximity to market, concerns for sustainability issues, high transportation cost, need for high proximity between key functions, need for intellectual property rights protection, etc.
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9.
  • Abid, Muhammad, 1981-, et al. (författare)
  • Sustainability reporting as a way to foster entrepreneurial universities
  • 2018
  • Ingår i: Proceedings of the 25th Annual EurOMA Conference - To Serve, to Produce and to Servitize in the Era of Networks, Big Data and Analytics, Budapest, June 24-26, 2018..
  • Konferensbidrag (refereegranskat)abstract
    • Higher education institutions (HEIs) play a major role in the development of societies. In the last decades, there has been an increasing interest on the commercialisation of knowledge by universities for economic development that lead to the emergence of the term “Entrepreneurial University”. This study aims to report the sustainability efforts of the University of Gävle, Sweden by applying a systematic tool, Graphical Assessment of Sustainability in Universities (GASU). This study highlights sustainability reporting as a way to improve communication practices between universities and stakeholder. The systematic and holistic assessment of HEIs gives insights of collaboration opportunities and by that foster their entrepreneurial journey.
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10.
  • Abrahamsen, Håkon B, et al. (författare)
  • Simulation-based training and assessment of non-technical skills in the Norwegian Helicopter Emergency Medical Services : a cross-sectional survey
  • 2015
  • Ingår i: Emergency Medicine Journal. - : BMJ. - 1472-0205 .- 1472-0213. ; 32:8, s. 647-653
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Human error and deficient non-technical skills (NTSs) among providers of ALS in helicopter emergency medical services (HEMS) is a threat to patient and operational safety. Skills can be improved through simulation-based training and assessment. Objective: To document the current level of simulation-based training and assessment of seven generic NTSs in crew members in the Norwegian HEMS. Methods: A cross-sectional survey, either electronic or paper-based, of all 207 physicians, HEMS crew members (HCMs) and pilots working in the civilian Norwegian HEMS (11 bases), between 8 May and 25 July 2012. Results: The response rate was 82% (n=193). A large proportion of each of the professional groups lacked simulation-based training and assessment of their NTSs. Compared with pilots and HCMs, physicians undergo statistically significantly less frequent simulation-based training and assessment of their NTSs. Fifty out of 82 (61%) physicians were on call for more than 72 consecutive hours on a regular basis. Of these, 79% did not have any training in coping with fatigue. In contrast, 72 out of 73 (99%) pilots and HCMs were on call for more than 3 days in a row. Of these, 54% did not have any training in coping with fatigue. Conclusions: Our study indicates a lack of simulation-based training and assessment. Pilots and HCMs train and are assessed more frequently than physicians. All professional groups are on call for extended hours, but receive limited training in how to cope with fatigue.
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