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- Haapasalo, H, et al.
(författare)
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Epidemiology of calcaneal fractures in Finland
- 2017
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Ingår i: Foot and ankle surgery : official journal of the European Society of Foot and Ankle Surgeons. - : Elsevier BV. - 1460-9584. ; 23:4, s. 321-324
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Tidskriftsartikel (refereegranskat)
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| 2. |
- Takala, M., et al.
(författare)
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Dielectric Properties and Partial Discharge Endurance of Polypropylene- Silica Nanocomposite
- 2010
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Ingår i: IEEE Transactions on Dielectrics and Electrical Insulation. - 1558-4135 .- 1070-9878. ; 17:4, s. 1259-1267
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents the results of the dielectric properties and partial discharge endurance measurements conducted on polypropylene (PP)-silica nanocomposite. The material compounds were analyzed with micro-Raman spectroscopy, X-ray tomography and transmission electron microscopy (TEM). ac and dc breakdown strength of the materials was measured. Dielectric response, capacitance and loss factor of the film samples were measured as a function of temperature and frequency. Partial discharge (PD) endurance of the reference PP and PP Silica nanocomposite was studied as a function of ac voltage. Material surfaces were analyzed after PD stress with optical microscopy. All dielectric measurements were done for oriented thin films with a thickness of 11-23 μm. The results were analyzed statistically to determine the effects of the additive on the properties of PP. The paper discusses the potential of PP Silica nanocomposite with a view to high voltage applications, especially power capac itors. © 2010 IEEE.
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| 6. |
- Huttunen, TT, et al.
(författare)
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Acute achilles tendon ruptures: incidence of injury and surgery in Sweden between 2001 and 2012
- 2014
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Ingår i: The American journal of sports medicine. - : SAGE Publications. - 1552-3365 .- 0363-5465. ; 42:10, s. 2419-2423
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Tidskriftsartikel (refereegranskat)abstract
- Population-based incidence rates and trends of acute Achilles tendon ruptures are not known. It is also not known whether recent high-quality randomized controlled trials not favoring surgery have had an effect on treatment protocols. Purpose: To assess the incidence of acute Achilles tendon ruptures in Sweden and to examine the trends in surgical treatment. Study Design: Descriptive epidemiology study. Methods: We conducted a nationwide registry-based study including all adult (≥18 years of age) inpatient and outpatient hospital visits because of an acute Achilles tendon rupture in Sweden between 2001 and 2012. Results: We identified a total of 27,702 patients (21,979 men, 79%) with acute Achilles tendon ruptures between 2001 and 2012. In 2001, the sex-specific incidence of acute Achilles tendon ruptures was 47.0 (per 100,000 person-years) in men and 12.0 in women. In 2012, the corresponding values were 55.2 in men and 14.7 in women, with an increase of 17% in men and 22% in women. The proportion of surgically treated patients declined from 43% in 2001 to 28% in 2012 in men and from 34% in 2001 to 22% in 2012 in women. Conclusion: The incidence of acute Achilles tendon ruptures in Sweden is increasing. The most probable reason for this increase is the rise in the number of older adults participating in high-demand sports. The proportion of surgically treated patients is decreasing most likely because of recent high-quality randomized controlled trials and their meta-analyses supporting similar results between surgical and nonsurgical approaches.
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