327 research outputs found
Parental Rights in Myspace: Reconceptualizing the State\u27s Parens Patriae Role in the Digital Age
Generally, parents have a great deal of leeway in their childrearing decisions, including choices in the content of their children\u27s internet use. But there is a harm about which many parents and state and federal governments are unaware: reputational harm. Children and teenagers\u27 current internet use puts them at risk of permanently harming their reputations, and there are no protective measures in place, whether educational or regulatory. They are posting personal information on the internet at an alarming rate mostly via social networking sites like MySpace.com and Facebook.com without an awareness of the present and long-term consequences, such as the ease of dissemination and the enduring nature of internet content. The risk that children\u27s present internet activity could irreparably harm their reputations in the future as they pursue higher education, professional careers, and even personal relationships, is sufficiently weighty that the government should step in as parens patriae to combat it and protect our children\u27s long-term freedom. To ensure our children and teenagers have the opportunity to develop their identities without the internet prematurely creating it for them, we must develop narrow regulations bolstered by education-based initiatives to protect the young from long-term consequences of their immature speech. While our current parental rights and First Amendment jurisprudence addresses most of the concerns that we have about children and teenager\u27s internet use, reputational harm requires special, more nuanced standards
Minimizing the Cost and Enhancing the Security for Cloud Hosting Service
Cloud computing is a new emerging technology which provides different kinds of services through internet and reduces maintenance cost as well as provides data reliability. Now a days many cloud service providers are providing services with different policies and prices. But it leads difficult to customers to choose cloud services with less price. That clients as a rule put their information into a single cloud and after that just trust to luckiness. Proposing new data hosting technique termed as CHARM which supports two strong functionalities.The first is selecting a few suitable clouds and a fitting excess system to store information with minimized financial expense and ensured accessibility.The second is setting off a move procedure to re-disperse information as indicated by the varieties of information access example and evaluating of clouds.In this project defining secret sharing algorithm to reduce the risk of data intrusion and the loss of service availability in the cloud and ensure data integrity. Finally proposed scheme not only saves the cost and also Maintains data and price adjustments
Imaging Biomarkers in Acute Ischemic Stroke Trials: A Systematic Review
Imaging biomarkers are increasingly used to provide a better understanding of the pathophysiology of acute ischemic stroke. However, this approach of routinely using imaging biomarkers to inform treatment decisions has yet to be translated into successful randomized trials. The aim of this study was to systematically review the use of imaging biomarkers in randomized controlled trials in patients with acute ischemic stroke, exploring the purposes for which the imaging biomarkers were used.We performed a systematic review of imaging biomarkers used in randomized controlled trials of acute ischemic stroke, in which a therapeutic intervention was trialed within 48 hours of symptom onset. Data bases searched included MEDLINE, EMBASE, strokecenter.org, and the Virtual International Stroke Trials Archive (1995-2014).Eighty-four studies met the criteria, of which 49 used imaging to select patients; 31, for subgroup analysis; and 49, as an outcome measure. Imaging biomarkers were broadly used for 8 purposes. There was marked heterogeneity in the definitions and uses of imaging biomarkers and significant publication bias among post hoc analyses.Imaging biomarkers offer the opportunity to refine the trial cohort by minimizing participant variation, to decrease sample size, and to personalize treatment approaches for those who stand to benefit most. However, within imaging modalities, there has been little consistency between stroke trials. Greater effort to prospectively use consistent imaging biomarkers should help improve the development of novel treatment strategies in acute stroke and improve comparison between studies
Recommended from our members
Prognostic performance of the REDS score, SOFA score, NEWS2 score, and the red-flag, NICE high-risk, and SIRS criteria to predict survival at 180 days, in emergency department patients admitted with suspected sepsis - An observational cohort study.
BACKGROUND: Patients admitted to hospital with sepsis are at persistent risk of poor outcome after discharge. Many tools are available to risk-stratify sepsis patients for in-hospital mortality. This study aimed to identify the best risk-stratification tool to prognosticate outcome 180 days after admission via the emergency department (ED) with suspected sepsis. METHODS: A retrospective observational cohort study was performed of adult ED patients who were admitted after receiving intravenous antibiotics for the treatment of a suspected sepsis, between 1st March and 31st August 2019. The Risk-stratification of ED suspected Sepsis (REDS) score, SOFA score, Red-flag sepsis criteria met, NICE high-risk criteria met, the NEWS2 score and the SIRS criteria, were calculated for each patient. Death and survival at 180 days were noted. Patients were stratified in to high and low-risk groups as per accepted criteria for each risk-stratification tool. Kaplan-Meier curves were plotted for each tool and the log-rank test performed. The tools were compared using Cox-proportional hazard regression (CPHR). The tools were studied further in those without the following specified co-morbidities: Dementia, malignancy, Rockwood Frailty score of 6 or more, long-term oxygen therapy and previous do-not-resuscitate orders. RESULTS: Of the 1,057 patients studied 146 (13.8%) died at hospital discharge and 284 were known to have died within 180 days. Overall survival proportion was 74.4% at 180 days and 8.6% of the population was censored before 180 days. Only the REDS and SOFA scores identified less than 50% of the population as high-risk. All tools except the SIRS criteria, prognosticated for outcome at 180 days; Log-rank tests between high and low-risk groups were: REDS score p < 0.0001, SOFA score p < 0.0001, Red-flag criteria p = 0.001, NICE high-risk criteria p = 0.0001, NEWS2 score p = 0.003 and SIRS criteria p = 0.98. On CPHR, the REDS [Hazard ratio (HR) 2.54 (1.92-3.35)] and SOFA [HR 1.58 (1.24-2.03)] scores out-performed the other risk-stratification tools. In patients without the specified co-morbidities, only the REDS score and the SOFA score risk-stratified for outcome at 180 days. CONCLUSION: In this study, all the risk-stratification tools studied were found to prognosticate for outcome at 180 days, except the SIRS criteria. The REDS and SOFA scores outperformed the other tools
Factor H autoantibody is associated with atypical hemolytic uremic syndrome in children in the United Kingdom and Ireland
Factor H autoantibodies can impair complement
regulation, resulting in atypical hemolytic uremic
syndrome, predominantly in childhood. There are no trials
investigating treatment, and clinical practice is only
informed by retrospective cohort analysis. Here we
examined 175 children presenting with atypical hemolytic
uremic syndrome in the United Kingdom and Ireland for
factor H autoantibodies that included 17 children with
titers above the international standard. Of the 17, seven
had a concomitant rare genetic variant in a gene encoding
a complement pathway component or regulator. Two
children received supportive treatment; both developed
established renal failure. Plasma exchange was associated
with a poor rate of renal recovery in seven of 11 treated. Six
patients treated with eculizumab recovered renal function.
Contrary to global practice, immunosuppressive therapy to
prevent relapse in plasma exchange–treated patients was
not adopted due to concerns over treatment-associated
complications. Without immunosuppression, the relapse
rate was high (five of seven). However, reintroduction of
treatment resulted in recovery of renal function. All
patients treated with eculizumab achieved sustained
remission. Five patients received renal transplants without
specific factor H autoantibody–targeted treatment with
recurrence in one who also had a functionally significant CFI mutation. Thus, our current practice is to initiate
eculizumab therapy for treatment of factor H
autoantibody–mediated atypical hemolytic uremic
syndrome rather than plasma exchange with or without
immunosuppression. Based on this retrospective analysis
we see no suggestion of inferior treatment, albeit the
strength of our conclusions is limited by the small sample siz
Motion correction of free-breathing magnetic resonance renography using model-driven registration
Introduction
Model-driven registration (MDR) is a general approach to remove patient motion in quantitative imaging. In this study, we investigate whether MDR can effectively correct the motion in free-breathing MR renography (MRR).
Materials and methods
MDR was generalised to linear tracer-kinetic models and implemented using 2D or 3D free-form deformations (FFD) with multi-resolution and gradient descent optimization. MDR was evaluated using a kidney-mimicking digital reference object (DRO) and free-breathing patient data acquired at high temporal resolution in multi-slice 2D (5 patients) and 3D acquisitions (8 patients). Registration accuracy was assessed using comparison to ground truth DRO, calculating the Hausdorff distance (HD) between ground truth masks with segmentations and visual evaluation of dynamic images, signal-time courses and parametric maps (all data).
Results
DRO data showed that the bias and precision of parameter maps after MDR are indistinguishable from motion-free data. MDR led to reduction in HD (HDunregistered = 9.98 ± 9.76, HDregistered = 1.63 ± 0.49). Visual inspection showed that MDR effectively removed motion effects in the dynamic data, leading to a clear improvement in anatomical delineation on parametric maps and a reduction in motion-induced oscillations on signal-time courses.
Discussion
MDR provides effective motion correction of MRR in synthetic and patient data. Future work is needed to compare the performance against other more established methods
- …