643 research outputs found

    Investigating the Citations Received by Journals of Directory of Open Access Journals from ISI Web of Science’s Articles

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    In this research, the citations received by DOAJ’s journals from the ISI Web of Science’s articles in 2003 to 2008 were studied and compared. The citations received by the journals in five fields (Arts & Humanities, Social Sciences, Pure Sciences, Technology & Engineering, and Health & Medical Sciences) as well as the difference among the citations received by DOAJ’s journals in the above- mentioned five fields were examined. The research method is citation analysis and the research data have been collected by means of Cited Reference Search in the ISI Web of Science. The English-language journals in DOAJ were chosen, and no sampling was used. Findings showed that out of 2953 journals, 321 journals (10.87%) received citations, and the total citations received by these journals were 19050 with the mean of 6.45 per journal; the journals in Pure Sciences received most citations (10116 citations, equal to 53.1%), and the ones in Arts & Humanities received the least citations (701 citations, equal to 3.68%). On the other hand, the findings of Chi-Square test (χ2) indicate that there is a significant difference among the citations in the above-mentioned five fields

    Burden of traumatic spine fractures in Tehran, Iran.

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    UNLABELLED: ABSTRACT: BACKGROUND: The Disability-Adjusted Life Year (DALY) was designed by the World Health Organization (WHO) to measure, compare, and analyze the burden of various diseases. To the best of our knowledge, this is the first study on the assessment of burden of traumatic spinal fracture (TSF) in an Iranian community. We estimated burden of TSF includes both isolated (iTSF) and associated injuries related to traumatic spinal fractures (aTSF) in Tehran, the capital of Iran, for the year 2006-2007 using DALYs. METHODS: Burden of TSF was estimated based on information provided by the national data on Iranian trauma, data from the WHO, and literature data using disease modeling (DISMOD). Incidence of TSF and associated injuries were obtained from two population based studies and National Trauma Data Bank in Iran, while duration, and relative risk of mortality (RRM) were obtained from WHO data and the literature. The incidence, duration, and relative risk of mortality (RRM) were used to calculate DALY for TSF. To calculate DALY, the years of life lost because of premature mortality (YLL) were added to the number of years lost because of disability (YLD). DALYs were calculated separately for both iTSF and aTSF. In-hospital YLD and post-hospital YLL for iTSF and in-hospital YLL and YLD were calculated for aTSFs. RESULTS: TSF incidence was 16.35 (95%CI: 3.4-48.0) per 100,000. The incidence of TSF in males was more than twice that of females. The largest DALYs were seen in 15-29 years. The highest burden of associated injuries of TSF was related to spinal cord and head injury. DALYs for aTSF were estimated to be 2496.9 years (32.0 DALY/100,000 population). The YLD and YLL were almost similar. Total DALY for iTSF and aTSF was 2568.9 years (32.92 DALY/100,000 population). Based on the risk extracted from the literature, post-hospital increased risk of mortality was increased by 1318 DALY (16.89 DALY/100,000 population). CONCLUSION: This study showed a considerable burden for TSFs mainly due to associated injuries and increased lifelong RRM in patients with TSF

    An efficient hybrid method for 3D to 2D medical image registration

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    PURPOSE: The purpose of this paper is to present a method for registration of 3D computed tomography to 2D single-plane fluoroscopy knee images to provide 3D motion information for knee joints. This 3D kinematic information has unique utility for examining joint kinematics in conditions such as ligament injury, osteoarthritis and after joint replacement. METHODS: We proposed a non-invasive rigid body image registration method which is based on two different multimodal similarity measures. This hybrid registration method helps to achieve a trade-off among different challenges including, time complexity and accuracy. RESULTS: We performed a number of experiments to evaluate the performance of the proposed method. The experimental results show that the proposed method is as accurate as one of the most recent registration methods while it is several times faster than that method. CONCLUSION: The proposed method is a non-invasive, fast and accurate registration method, which can provide 3D information for knee joint kinematic measurements. This information can be very helpful in improving the accuracy of diagnosis and providing targeted treatment

    EPIdemiology of Surgery-Associated Acute Kidney Injury (EPIS-AKI): Study protocol for a multicentre, observational trial

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    Introduction More than 300 million surgical procedures are performed each year. Acute kidney injury (AKI) is a common complication after major surgery and is associated with adverse short-term and long-term outcomes. However, there is a large variation in the incidence of reported AKI rates. The establishment of an accurate epidemiology of surgery-associated AKI is important for healthcare policy, quality initiatives, clinical trials, as well as for improving guidelines. The objective of the Epidemiology of Surgery-associated Acute Kidney Injury (EPIS-AKI) trial is to prospectively evaluate the epidemiology of AKI after major surgery using the latest Kidney Disease: Improving Global Outcomes (KDIGO) consensus definition of AKI. Methods and analysis EPIS-AKI is an international prospective, observational, multicentre cohort study including 10 000 patients undergoing major surgery who are subsequently admitted to the ICU or a similar high dependency unit. The primary endpoint is the incidence of AKI within 72 hours after surgery according to the KDIGO criteria. Secondary endpoints include use of renal replacement therapy (RRT), mortality during ICU and hospital stay, length of ICU and hospital stay and major adverse kidney events (combined endpoint consisting of persistent renal dysfunction, RRT and mortality) at day 90. Further, we will evaluate preoperative and intraoperative risk factors affecting the incidence of postoperative AKI. In an add-on analysis, we will assess urinary biomarkers for early detection of AKI. Ethics and dissemination EPIS-AKI has been approved by the leading Ethics Committee of the Medical Council North Rhine-Westphalia, of the Westphalian Wilhelms-University Münster and the corresponding Ethics Committee at each participating site. Results will be disseminated widely and published in peer-reviewed journals, presented at conferences and used to design further AKI-related trials. Trial registration number NCT04165369

    The Effectiveness of Well-Being Therapy on Coping Strategies and Self-Efficacy of Patients with Chronic Neuropathic Pain

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    Background and Objective: Neuropathic diseases are neurodegenerative conditions and a wide and difficult group of peripheral nerve diseases in humans. Since well-being therapy emphasizes the high levels of six domains of psychological well-being, this study was conducted to investigate the effectiveness of well-being therapy on pain coping strategies and self-efficacy of patients with chronic neuropathic pain. Methods: This clinical trial was conducted on 30 chronic neuropathic patients referred to Ayatollah Rouhani hospital in Babol and a neurologist's private office in two groups of experimental and control (n=15). Well-being therapy was performed in 8 sessions of 120 minutes, once a week for the experimental group, while the control group received the routine treatment. After the follow-up period, the control group also underwent psychotherapy. Both groups completed questionnaires of pain coping strategies (Rosenstiel and Keefe, 1985) and pain self-efficacy (Nicholas, 1989) in the pre-test, post-test and follow-up (two months after the post-test) and were compared. Findings: The results showed that there was a statistically significant difference between the two experimental and control groups in the score of the subscales of pain coping strategies in distraction from pain (23.13±3.88 versus 11.47±7.34) (p<0.001), reinterpretation of pain (17.33±5.56 versus 13.0±8.65) (p=0.114), catastrophizing (10.0±6.24 versus 16.33±5.4) (p<0.001), ignoring pain (24.4±6.67 versus 12.6±5.11) (p<0.001), hoping/praying (29.13±9.97 versus 22.4±5.7) (p=0.031), self-talk (25±4.03 versus 21.2±4.79) (p=0.026), behavioral activation (20.47±4.43 versus 11.20±4.94) (p<0.001) and pain self-efficacy (43.2±9.45 versus 33.33±13.34) (p=0.027). These results were maintained in the follow-up period. Conclusion: The present study showed that wellness therapy can be an effective intervention in improving pain coping strategies and increasing pain self-efficacy in chronic neuropathic patients

    Viscosupplementation for knee osteoarthritis: systematic review and meta-analysis

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    Objective: To evaluate the effectiveness and safety of viscosupplementation for pain and function in patients with knee osteoarthritis. Design: Systematic review and meta-analysis of randomised trials. Data sources Searches were conducted of Medline, Embase, and the Cochrane Central Register of Controlled Trials (CENTRAL) databases from inception to 11 September 2021. Unpublished trials were identified from the grey literature and trial registries. Eligibility criteria for study selection: Randomised trials comparing viscosupplementation with placebo or no intervention for knee osteoarthritis treatment. Main outcome measures: The prespecified primary outcome was pain intensity. Secondary outcomes were function and serious adverse events. Pain and function were analysed as standardised mean differences (SMDs). The prespecified minimal clinically important between group difference was −0.37 SMD. Serious adverse events were analysed as relative risks. Methods: Two reviewers independently extracted relevant data and assessed the risk of bias of trials using the Cochrane risk of bias tool. The predefined main analysis was based only on large, placebo controlled trials with ≥100 participants per group. Summary results were obtained through a random effects meta-analysis model. Cumulative meta-analysis and trial sequential analysis under a random effects model were also performed. Results: 169 trials provided data on 21 163 randomised participants. Evidence of small study effects and publication biases was observed for pain and function (Egger’s tests with P<0.001 and asymmetric funnel plots). Twenty four large, placebo controlled trials (8997 randomised participants) included in the main analysis of pain indicated that viscosupplementation was associated with a small reduction in pain intensity compared with placebo (SMD −0.08, 95% confidence interval −0.15 to −0.02), with the lower bound of the 95% confidence interval excluding the minimal clinically important between group difference. This effect corresponds to a difference in pain scores of −2.0 mm (95% confidence interval −3.8 to −0.5 mm) on a 100 mm visual analogue scale. Trial sequential analysis for pain indicated that since 2009 there has been conclusive evidence of clinical equivalence between viscosupplementation and placebo. Similar conclusions were obtained for function. Based on 15 large, placebo controlled trials on 6462 randomised participants, viscosupplementation was associated with a statistically significant higher risk of serious adverse events than placebo (relative risk 1.49, 95% confidence interval 1.12 to 1.98). Conclusion: Strong conclusive evidence indicates that viscosupplementation leads to a small reduction in knee osteoarthritis pain compared with placebo, but the difference is less than the minimal clinically important between group difference. Strong conclusive evidence indicates that viscosupplementation is also associated with an increased risk of serious adverse events compared with placebo. The findings do not support broad use of viscosupplementation for the treatment of knee osteoarthritis

    Diurnal and Seasonal Mapping of Martian Ices With EMIRS

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    Condensation and sublimation of ices at the surface of the planet is a key part of both the Martian H2_2O and CO2_2 cycles, either from a seasonal or diurnal aspect. While most of the ice is located within the polar caps, surface frost is known to be formed during nighttime down to equatorial latitudes. Here, we use data from the Emirates Mars Infrared Spectrometer (EMIRS) onboard the Emirates Mars Mission (EMM) to monitor the diurnal and seasonal evolution of the ices at the surface of Mars over almost one Martian year. The unique local time coverage provided by the instrument allows us to observe the apparition of equatorial CO2_2 frost in the second half of the Martian night around the equinoxes, to its sublimation at sunrise

    Early manifestation of ARDS in COVID-19 infection in a 51- year-old man affected by Mounier-Kuhn syndrome

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    A 51-year-old man known to be affected by Mounier-Kuhn syndrome (MKS). presented to Accident & Emergecy (A&E) with fever, dyspnea and deterioration of his chronic coughs. Increased diameters of his trachea (39 mm), right (30 mm) and left (26 mm) main bronchi were revealed by chest computerized tomography (CT) scan. CT scan showed also ground-glass opacities (GGO) and bronchiectasis in the mid and lower zones of both lungs. COIVD-19 infection was eventually confirmed by RT-PCR. A severe form of COVID-19 could occur even in the early stages of the disease in presence of underlying co-morbidities including MKS, which increases the susceptibility to more recurrent and severe respiratory infections. © 2020 Elsevier Inc
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