Using a CTF Activity to Teach Cloud and Web Security

While cloud computing is an attractive option in terms of price, availability, and scalability, cloud consumers must also weigh the security concerns of a cloud environment. In particular, security breaches due to misconfiguration are common, and this prevalence starts with inadequate education and training. Consequently, we incorporated a capture the flag (CTF) activity into an existing course to illuminate the potential pitfalls and consequences of cloud misconfiguration and to encourage participants to protect against such issues in their own applications. In this paper, we report on the effectiveness of the CTF activity to achieve these goals. Our evaluation specifically focuses on participants' interests, self-perceptions, and application of essential security practices (e.g., defensive programming techniques) to defend against common types of attacks. Our results indicate that the CTF activity was perceived favorably by students, but participants performed comparably to their peers on independent assessments, including test questions related to web security and securing a web application developed as part of a course project. We examine these issues and suggest a path forward to address them, particularly by better aligning the CTF activity with the stated course outcomes in conjunction with collecting additional data in future semesters

No association between exacerbation frequency and stroke in patients with COPD.

BACKGROUND: Patients with chronic obstructive pulmonary disease (COPD) have a higher risk of stroke than the general population. Chronic inflammation associated with COPD is thought to contribute to this risk. Exacerbations of COPD are associated with a rise in inflammation, suggesting that there may be an association between exacerbation frequency and the risk of stroke. This study examined that association. METHODS: Using the UK Clinical Practice Research Datalink, COPD patients with a first stroke between January 2004 and December 2013 were identified as cases and matched on age, sex, and general practice to controls with COPD but without a stroke (6,441 cases and 19,323 controls). Frequent exacerbators (FEs) were defined as COPD patients with ≥2 exacerbations, and infrequent exacerbators (IEs) have ≤1 exacerbation in the year prior to their stroke. Conditional logistic regression was used to estimate the association between exacerbation frequency and stroke overall, and by stroke subtype (hemorrhagic, ischemic, or transient ischemic attack). Exacerbations were also categorized into 0, 1, 2, or ≥3 exacerbations in the year prior to stroke. RESULTS: There was no evidence that FE had an increased odds of stroke compared to IE (OR [odds ratio] =0.95, 95% CI [confidence interval] =0.89-1.01). There was strong evidence that the risk of stroke decreased with each exacerbation of COPD experienced per year (P trend =0.003). In the subgroup analysis investigating stroke subtype, FE had 33% lower odds of hemorrhagic stroke than IE (OR =0.67, 95% CI =0.51-0.88, P=0.003). No association was found within other stroke types. CONCLUSION: This study found no evidence of a difference in the odds of stroke between IE and FE, suggesting that exacerbation frequency is unlikely to be the reason for increased stroke risk among COPD patients. Further research is needed to explore the association through investigation of stroke risk and the severity, duration, treatment of exacerbations, and concurrent treatment of cardiovascular risk factors

The Face of Interface: Studying Interface to the Scholarly Corpus and Edition

How can we study the interface of scholarly knowledge across print and digital epochs? To ask about interface across epochs is to take a concept that makes sense in the digital world and anachronistically bring it to bear on print in a way that could confuse both. Nonetheless we need to develop ways of thinking about the relationship between design, knowledge and audience across media, and to do that we find ourselves remediating concepts like interface. This paper takes the category of interface and adapts it to studying the design of the corpus and edition

Levels of growth factors from platelet-rich fibrin from chronic periodontitis versus periodontally healthy subjects: a pilot study

Objectives This study aimed to (1) compare the amounts of growth factors from platelet-rich fibrin (PRF) between chronic periodontitis and periodontally healthy subjects and (2) evaluate the relationships between the amounts of growth factors from PRF with complete blood counts (white blood cell (WBC) and platelet counts) and the serum concentrations of IL-1β, IL-6, and tumor necrosis factor-α (TNF-α). Materials and methods Venous blood was collected from chronic periodontitis (test) and periodontally healthy subjects (control). PRF and serum were collected from the centrifuged blood. Liquid exudates from the compression of PRF were collected. The compressed PRF membranes were incubated in saline, and eluted aliquots were collected at 1, 24, and 72 h, and the membranes were then digested with trypsin. Epidermal growth factor, insulin-like growth factor-1, platelet-derived growth factor-BB, transforming growth factor-β1, and vascular endothelial growth factor in the exudates and eluents were quantified by ELISA. Serum was used for IL-1β, IL-6, and TNF-α quantifications. Complete blood counts were measured. Results There were no significant differences in the amounts of growth factors from PRF exudates and membranes measured between groups (all p > 0.05). The test group had significantly higher WBC (p  0.05). Conclusions PRF can be utilized as an autologous source of growth factors not affected by periodontal condition and WBC level

Early Treatment for Neonatal Abstinence Syndrome: A Palliative Approach.

Objective To describe medical, safety, and health care utilization outcomes associated with an early treatment model for neonatal opioid withdrawal. Study Design This is a retrospective review of 117 opioid-exposed infants born in a large regional hospital and treated in the level I nursery with methadone initiated within 48 hours of birth. Results For this cohort, mean length of stay was 8.3 days. Hospital safety events were infrequent; there were no medication errors or deaths. Within 30 days of discharge, 14% of infants visited the emergency department; 7% were readmitted. Per birth, mean hospital charges were $10,946.96; mean costs were$5,908.93. Conclusion This study is the first to describe an early treatment model in a low-acuity nursery to prevent severe neonatal opioid withdrawal. The described model may be safe, effective, low-cost, and feasible for replication

Early Treatment Innovation for Opioid-Dependent Newborns: A Retrospective Comparison of Outcomes, Utilization, Quality, and Safety, 2006-2014.

BACKGROUND:Few coordinated treatment programs address the needs of infants and families struggling with the effects of substance use. In 2003 a large Southeastern regional hospital launched the Managing Abstinence in Newborns (MAiN) program, providing multidisciplinary, coordinated, community-based care for neonatal abstinence syndrome (NAS). A hypothesis-generating study was conducted to compare the outcomes of MAiN infants to comparable NAS infants receiving traditional care from 2006 through 2014 in South Carolina. METHODS:De-identified sociodemographic and clinical data on MAiN infants, as well as NAS infants not treated with MAiN, were obtained from South Carolina statewide databases. Study measures included medical and safety outcomes, health services utilization, child protective services involvement, emergency services utilization, and inpatient readmissions. RESULTS:Some 110 infants were identified who received the MAiN intervention and 356 NAS infants, also in South Carolina, who were potentially MAiN eligible. Overall, there were no significant differences in the two groups regarding medical or safety outcomes or child protective services involvement. Traditional care NAS infants were more likely to be treated in a higher-level nursery (68.8% vs. 0%). MAiN infants had $8,204 less per birth in median charges (p <0.001) than the traditional care NAS infants. MAiN infants also had a lower percentage of ED visits (p = 0.01) assessed as possibly or likely NAS related compared to traditional care NAS infants. CONCLUSION:This study demonstrates the potential value of implementing the MAiN model in eligible NAS infants. With no difference in medical and safety outcomes and a significant reduction in charges, the MAiN model can be considered safe and cost-effective

Factors infuencing variation in investigations after a negative CT brain scan in suspected subarachnoid haemorrhage: A qualitative study

Introduction Variation in the approach to the patient with a possible subarachnoid haemorrhage (SAH) has been previously documented. The purpose of this study was to identify factors that influence emergency physicians’ decisions about diagnostic testing after a normal CT brain scan for ED patients with a headache suspicious of a SAH. Methods We conducted an interview-based qualitative study informed by social constructionist theory. Fifteen emergency physicians from six EDs across Queensland, Australia, underwent individual face-to-face or telephone interviews. Content analysis was performed whereby transcripts were examined and coded independently by two co-investigators, who then jointly agreed on the influencing factors. Results Six categories of influencing factors were identified. Patient interaction was at the forefront of the identified factors. This shared decision-making process incorporated ‘what the patient wants’ but may be biased by how the clinician communicates the benefits and harms of the diagnostic options to the patient. Patient risk profile, practice evidence and guidelines were also important. Other influencing factors included experiential factors of the clinician, consultation with colleagues and external influences where practice location and work processes impose constraints on test ordering external to the preferences of the clinician or patient. The six categories were organised within a conceptual framework comprising four components: the context, the evidence, the experience and the decision. Conclusions When clinicians are faced with a diagnostic challenge, such as the workup of a patient with suspected SAH, there are a number of influencing factors that can result in a variation in approach. These need to be considered in approaches to improve the appropriateness and consistency of medical care.No Full Tex

Lianas Suppress Seedling Growth and Survival of 14 Tree Species in a Panamanian Tropical Forest

Lianas are a common plant growth form in tropical forests, where they compete intensely with trees, decreasing tree recruitment, growth, and survival. If the detrimental effects of lianas vary significantly with tree species identity, as is often assumed, then lianas may influence tree species diversity and community composition. Furthermore, recent studies have shown that liana abundance and biomass are increasing relative to trees in neotropical forests, which will likely magnify the detrimental effects of lianas and may ultimately alter tree species diversity, relative abundances, and community composition. Few studies, however, have tested the responses of multiple tree species to the presence of lianas in robust, well‐replicated experiments. We tested the hypotheses that lianas reduce tree seedling growth and survival, and that the effect of lianas varies with tree species identity. We used a large‐scale liana removal experiment in Central Panama in which we planted 14 replicate seedlings of 14 different tree species that varied in shade tolerance in each of 16 80 × 80 m plots (eight liana‐removal and eight unmanipulated controls; 3136 total seedlings). Over a nearly two‐yr period, we found that tree seedlings survived 75% more, grew 300% taller, and had twice the aboveground biomass in liana‐removal plots than seedlings in control plots, consistent with strong competition between lianas and tree seedlings. There were no significant differences in the response of tree species to liana competition (i.e., there was no species by treatment interaction), indicating that lianas had a similar negative effect on all 14 tree species. Furthermore, the effect of lianas did not vary with tree species shade tolerance classification, suggesting that the liana effect was not solely based on light. Based on these findings, recently observed increases in liana abundance in neotropical forests will substantially reduce tree regeneration, but will not significantly alter tropical tree species diversity, relative abundance, or community composition

The Beginning, The Middle, and The End: New Tools for the Scholarly Edition

This article discusses a set of prototypes currently being designed and created by the Interface Design team of the Implementing New Knowledge Environments (INKE) project. These prototypes attempt to supplement the user experience in reading digital scholarly editions, by supporting a set of tasks that are straightforward in a digital environment but in a print edition would be sufficiently more difficult as to be prohibitive. We therefore offer these experimental prototypes as a collection of new affordances for the scholarly edition, although they may reasonably be extended, with some variation, to other kinds of digital text

The Beginning, The Middle, and The End: New Tools for the Scholarly Edition

This article discusses a set of prototypes currently being designed and created by the Interface Design team of the Implementing New Knowledge Environments (INKE) project. These prototypes attempt to supplement the user experience in reading digital scholarly editions, by supporting a set of tasks that are straightforward in a digital environment but in a print edition would be sufficiently more difficult as to be prohibitive. We therefore offer these experimental prototypes as a collection of new affordances for the scholarly edition, although they may reasonably be extended, with some variation, to other kinds of digital text