An autonomic approach to denial of service defence

Denial of service attacks, viruses and worms are com- mon tools for malicious adversarial behaviour in networks. In this paper we propose the use of our autonomic routing protocol, the Cognitive Packet Network (CPN), as a means to defend nodes from Distributed Denial of Service Attacks (DDoS), where one or more attackers generate flooding traffic from multiple sources towards selected nodes or IP addresses. We use both analytical and simulation mod- elling, and experiments on our CPN testbed, to evaluate the advantages and disadvantages of our approach in the pres- ence of imperfect detection of DDoS attacks, and of false alarms

The Grizzly, November 5, 2015

Wellness Increases Accessibility to Students • Trending: Discounted Jerseys • U-Imagine to Host Annual Bear Pitch Competition • A New Take on an Old Genre • STAT: More Than Just an Acronym • Opinions: Students Who Go the Distance; Sicario • Field Hockey Set to Defend Centennial Conference Title • Battle in Gettysburghttps://digitalcommons.ursinus.edu/grizzlynews/1676/thumbnail.jp

Nanofriction mechanisms derived from the dependence of friction on load and sliding velocity from air to UHV on hydrophilic silicon

This paper examines friction as a function of the sliding velocity and applied normal load from air to UHV in a scanning force microscope (SFM) experiment in which a sharp silicon tip slides against a flat Si(100) sample. Under ambient conditions, both surfaces are covered by a native oxide, which is hydrophilic. During pump-down in the vacuum chamber housing the SFM, the behavior of friction as a function of the applied normal load and the sliding velocity undergoes a change. By analyzing these changes it is possible to identify three distinct friction regimes with corresponding contact properties: (a) friction dominated by the additional normal forces induced by capillarity due to the presence of thick water films, (b) higher drag force from ordering effects present in thin water layers and (c) low friction due to direct solid-solid contact for the sample with the counterbody. Depending on environmental conditions and the applied normal load, all three mechanisms may be present at one time. Their individual contributions can be identified by investigating the dependence of friction on the applied normal load as well as on the sliding velocity in different pressure regimes, thus providing information about nanoscale friction mechanisms

The Grizzly, December 10, 2015

Museum Studies Minor Coming in Spring 2016 • Students Demand Diversity • BEAR Pitch Competition Crowns Winners • International Perspective: Differences in Cultural Cleaning Routines • Flapjacks for Finals • Artists\u27 Tribute to Chadwick • Bringing Safety to the Students • Opinions: Protests Prompt Hate on Yik Yak; Why Syrian Refugees Don\u27t Pose a Threat • Outrunning the Competition • Men\u27s Basketball Set to Take on Division I Pennhttps://digitalcommons.ursinus.edu/grizzlynews/1679/thumbnail.jp

The Grizzly, January 28, 2016

Student Raises Funds to Prevent Suicide • Tragedy Prompts Main Street Changes • Ursinus Introduces Open Access Publishing System • Ursinus Welcomes Alumni as Entrepreneur-in-Residence • International Perspective: Differences in Friendships Across Cultures • Rare Bird Exhibit Migrates to Berman • Coasting Through Costa Rica • Opinions: Everyone\u27s an Activist on Facebook; Letter from an Alumnus: Guns; Film Review: Star Wars: The Force Awakens Rates 7 / 10 • Women\u27s Indoor Track and Field Ready to Run • Vaulting Into Actionhttps://digitalcommons.ursinus.edu/grizzlynews/1680/thumbnail.jp

The Grizzly, October 1, 2015

Safety First: New Campus Safety Officer Looks to Connect with Students • Artist Transforms Ursinus Faces into Famous Painting • Design Philly Festival Kicks Off with Pop-up Exhibition • Politics Professor Looks to Expand Research on Africa • U-Imagine Center Promotes Entrepreneurship • UC Students Get Down to the Heart of the Matter • Putting Passion into Practice • Opinions: Is Fun Home Appropriate for CIE?; The Cleaning Staff Should Not be Ignored • In the Swing of Things • Men\u27s and Women\u27s Rugby Teams Prepare for Seasonhttps://digitalcommons.ursinus.edu/grizzlynews/1672/thumbnail.jp

Gut microbiome composition in the Hispanic Community Health Study/Study of Latinos is shaped by geographic relocation, environmental factors, and obesity.

Background: Hispanics living in the USA may have unrecognized potential birthplace and lifestyle influences on the gut microbiome. We report a cross-sectional analysis of 1674 participants from four centers of the Hispanic Community Health Study/Study of Latinos (HCHS/SOL), aged 18 to 74 years old at recruitment.Results: Amplicon sequencing of 16S rRNA gene V4 and fungal ITS1 fragments from self-collected stool samples indicate that the host microbiome is determined by sociodemographic and migration-related variables. Those who relocate from Latin America to the USA at an early age have reductions in Prevotella to Bacteroides ratios that persist across the life course. Shannon index of alpha diversity in fungi and bacteria is low in those who relocate to the USA in early life. In contrast, those who relocate to the USA during adulthood, over 45 years old, have high bacterial and fungal diversity and high Prevotella to Bacteroides ratios, compared to USA-born and childhood arrivals. Low bacterial diversity is associated in turn with obesity. Contrasting with prior studies, our study of the Latino population shows increasing Prevotella to Bacteroides ratio with greater obesity. Taxa within Acidaminococcus, Megasphaera, Ruminococcaceae, Coriobacteriaceae, Clostridiales, Christensenellaceae, YS2 (Cyanobacteria), and Victivallaceae are significantly associated with both obesity and earlier exposure to the USA, while Oscillospira and Anaerotruncus show paradoxical associations with both obesity and late-life introduction to the USA.Conclusions: Our analysis of the gut microbiome of Latinos demonstrates unique features that might be responsible for health disparities affecting Hispanics living in the USA

Relation of Diabetes to Cognitive Function in Hispanics/Latinos of Diverse Backgrounds in the United States

Objectives:To examine the association between diabetes and cognitive function within U.S. Hispanics/Latinos of Central American, Cuban, Dominican, Mexican, Puerto Rican, and South American background. Method: This cross-sectional study included 9,609 men and women (mean age = 56.5 years), who are members of the Hispanic Community Health Study/Study of Latinos. We classified participants as having diabetes, prediabetes, or normal glucose regulation. Participants underwent a neurocognitive battery consisting of tests of verbal fluency, delayed recall, and processing speed. Analyses were stratified by Hispanic/Latino subgroup. Results: From fully adjusted linear regression models, compared with having normal glucose regulation, having diabetes was associated with worse processing speed among Cubans (β = −1.99; 95% CI [confidence interval] = [−3.80, −0.19]) and Mexicans (β = −2.26; 95% CI = [−4.02, −0.51]). Compared with having normal glucose regulation, having prediabetes or diabetes was associated with worse delayed recall only among Mexicans (prediabetes: β = −0.34; 95% CI = [−0.63, −0.05] and diabetes: β = −0.41; 95% CI = [−0.79, −0.04]). No associations with verbal fluency. Discussion: The relationship between diabetes and cognitive function varied across Hispanic/Latino subgroup

The Grizzly, November 19, 2015

On the Way to the Final Four • Watson Finalists Prepare for Next Steps • U-Imagine Center Offers First Course • Committee Searches for Violence Prevention Educator • International Perspective: Dealing With Graduation Concerns Abroad • Warming Up to the Challenge • Podcast Roars to Life • Preparing for Professional Life • Opinions: It\u27s On Us is Insufficient; Wellness Critics are Ill-Informed • New Era Begins for Women\u27s Basketball • Two Wrestlers Named Preseason All-Americans • Final Four Boundhttps://digitalcommons.ursinus.edu/grizzlynews/1678/thumbnail.jp

Ordinary morality does not imply atheism

Many theist as well as many atheist philosophers have maintained that if God exists, then every instance of undeserved, unwanted suffering ultimately benefits the sufferer. Recently, several authors have argued that this implication of theism conflicts with ordinary morality. I show that these arguments all rest on a common mistake. Defenders of these arguments overlook the role of merely potential instances of suffering in determining our moral obligations toward suffering