A Comparison Between Different Frameworks Based on Application Metrics à la Argo Rollouts

This research investigates the integration and effectiveness of two monitoring frameworks, the Four Golden Signals and the RED Method, with Argo Rollouts for automated deployments. The study aims to identify which framework integrates better with Argo Rollouts, compare their effectiveness in automating deployment procedures, and assess the impact of automated deployments on application performance. Experiments involve fault injections, such as HTTP 500 errors and delays, to evaluate the frameworks ability to detect unhealthy deployments and trigger rollbacks. Both frameworks were successfully integrated using Prometheus for metric collection and custom analysis templates for health assessment. The Four Golden Signals provided more comprehensive insights due to its additional metrics (saturation and latency), whereas the RED Method was simpler to configure and interpret. The findings highlight the importance of carefully calibrating metric thresholds to accurately identify unhealthy deployments. Future work suggests exploring Blue-Green deployments, investigating the robustness of systems under security breaches, and assessing cost savings from using Argo Rollouts over time

Investigating Mobile Broadband Coverage in Rural Areas

With an increasing demand of mobile data traffic, and a growing assumption of continuous Internet connectivity, it is important to investigate the characteristics of mobile cellular networks. The consequence of insufficient capacity will grow as the cloud and other Internet demanding services, not only makes us dependent, but becomes a way of living. The present study aims to identify areas without mobile network coverage in Värmland County in central Sweden. An additional aim is to find statistical relationships between network performance metrics such as throughput, signal strength and latency. With data collected during an eight month period, network characteristics have been investigated for the three Swedish mobile operators, Tre, Telia and Telenor. The performed data analysis show multiple regions where at least one operator is unable to provide sufficient performance and regions strongly overrepresented by a specific operator. Provided analysis also show a correlation between signal strength and key performance metrics, such as throughput and network delay

A Comparison Between Different Frameworks Based on Application Metrics à la Argo Rollouts

This research investigates the integration and effectiveness of two monitoring frameworks, the Four Golden Signals and the RED Method, with Argo Rollouts for automated deployments. The study aims to identify which framework integrates better with Argo Rollouts, compare their effectiveness in automating deployment procedures, and assess the impact of automated deployments on application performance. Experiments involve fault injections, such as HTTP 500 errors and delays, to evaluate the frameworks ability to detect unhealthy deployments and trigger rollbacks. Both frameworks were successfully integrated using Prometheus for metric collection and custom analysis templates for health assessment. The Four Golden Signals provided more comprehensive insights due to its additional metrics (saturation and latency), whereas the RED Method was simpler to configure and interpret. The findings highlight the importance of carefully calibrating metric thresholds to accurately identify unhealthy deployments. Future work suggests exploring Blue-Green deployments, investigating the robustness of systems under security breaches, and assessing cost savings from using Argo Rollouts over time

On the Diophantine Equation CZ2 = X5 + Y5

In this work we determine an infinit sequence of different values of C for which the diophantine equation Cz2 = x5 + y5 has no coprime non-trivial solutions

Sweden’s proposed excise tax on plastic bags -Using a stated preference method to evaluate outcomes

The 1st of May 2020, the Swedish government will implement an excise tax on plastic bags. Using a stated preference method, this paper explores the effects the excise tax will have on plastic bag consumption. The vast majority of plastic bags that are sold in Sweden are grocery store bags. Therefore, this study focuses on the consumption effects on grocery store bags, as opposed to plastic bags that are sold in other types of stores. Intercept surveys were conducted outside of four different grocery stores. Using the data gathered during the surveys, we calculate the average consumption decrease given three different price scenarios. Further, data on consumption habits in regard to the so called “fruit bags” was also collected. Using this data, we were able to calculate the consumption decrease at two different price levels for fruit bags. This study finds that, given a price increase of 3 SEK, plastic bag consumption will decrease by almost 36%. The consumption of plastic bags decreased by 11% between 2017 and 2018, and if this trend continues after the excise is implemented, we believe that it is possible to reach the EU consumption target of 40 plastic bags per person per year in 2025, but it is unsure if any further action is needed

On the Diophantine Equation CZ2 = X5 + Y5

In this work we determine an infinit sequence of different values of C for which the diophantine equation Cz2 = x5 + y5 has no coprime non-trivial solutions

KAUDroid : A tool that will spy on applications and how they spy on their users

Our mobile phone is today our most precious and condential partof us. In many cases we do not only share phone number with it, butalso our most private information. This information is to some extensionnaively shared and gathered without our knowledge. As the number ofadvanced and sophisticated services increase the more sensitive informa-tion we seem to throw at them. To prevent privacy intrusions Googles'soperation system Android uses something called permissions. Permis-sions are a decision to allow an Android application access to a resourceon a specic device. Once a permission is granted there is no possibil-ity for a user to verify that the application does not take advantage ofthe given trust. With granted permissions applications can collect a vastamount of information without any connection to the service it provides.To highlight this problem we present the KAUDroid platform, a two part,Android application surveillance system. KAUDroid consists of an An-droid application that collect permission usage on phones and a centralserver responsible for data storage. Information is presented to the publicthrough a web user interface using graphs to visualize data in a under-standable manner. With this tool we hope to raise the general awareness ofhow third-party applications tend to abuse their trust and to help peoplerecapture their unconsciously lost privacy.Working paper, Januari 2018</p

Chlamydia (Chlamydophila) pneumoniae-induced cell death in human coronary artery endothelial cells is caspase-independent and accompanied by subcellular translocations of Bax and apoptosis-inducing factor.

Atherosclerosis and coronary heart disease are causing high morbidity and mortality worldwide. Different risk factors have been demonstrated, but the exact mechanisms behind these diseases are still not fully understood. Recent studies have suggested Chlamydia pneumoniae to be involved in the pathogenesis, and increased apoptotic indexes in atherosclerotic plaques have been documented. In this study, we show that C. pneumoniae induces apoptosis and necrosis in populations of human coronary artery endothelial cells. Apoptosis was determined by TUNEL and flow cytometry after staining of cells with annexin V and propidium iodide, and defined as TUNEL-reactive or annexin V-positive, propidium iodide-negative cells. The apoptosis was induced within 2 h postinfection and increased with inoculation dose. The general caspase inhibitor z-VAD-fmk did not affect apoptotic frequencies. By immunochemistry and immunoblot, we demonstrated activation and subcellular translocation of the proapoptotic protein Bax, and translocation of apoptosis-inducing factor from the cytosol to the nucleus. These results indicate that C. pneumoniae-induced apoptosis in human coronary artery endothelial cells is caspase-independent and regulated by Bax and apoptosis-inducing factor.The definitive version is available at www.blackwell-synergy.com:Johan Schöier, Marie Högdahl, Gustaf Söderlund and Erik Kihlström, Chlamydia (Chlamydophila) pneumoniae-induced cell death in human coronary artery endothelial cells is caspase-independent and accompanied by subcellular translocations of Bax and apoptosis-inducing factor., 2006, FEMS Immunology and Medical Microbiology, (47), 2, 207-216.http://dx.doi.org/10.1111/j.1574-695X.2006.00083.xCopyright: Blackwell Publishing Ltd. http://www.blackwellpublishing.com/and Scandinavian Societies for Medical Microbiology and Patholog