So please excuse me answering a question that was asked almost 8 years ago, but it still came out on top in my SO search, so it might come up for others as well. If you believe you should have access to that content, please contact your librarian.The accepted answer given here does IMHO not apply to typical real life use cases where you want to calculate the centroid of a shape defined by a set of (x,y) vertices (aka polygon). The institutional subscription may not cover the content that you are trying to access. Oxford Academic is home to a wide variety of products. You can be signed in to your personal account and your institution’s account at the same time.Ĭlick the account icon in the top left to view your signed in accounts and access account management features. Here you will find options to view and activate subscriptions, manage institutional settings and access options, access usage statistics, and more. Some societies use Oxford Academic personal accounts to provide access for their members.įor librarians and administrators, your personal account also provides access to institutional account management. Some societies use Oxford Academic personal accounts for their members.Ī personal account can be used to get email alerts, save searches, purchase content, and activate subscriptions. If you do not have a society account or have forgotten your username or password, please contact your society. Do not use an Oxford Academic personal account. When on the society site, please use the credentials provided by that society.Many societies offer member access to their journals using single sign-on between the society website and Oxford Academic. If you cannot sign in, please contact your librarian. If your institution is not listed or you cannot sign in to your institution’s website, please contact your librarian or administrator.Įnter your library card number to sign in. Following successful sign in, you will be returned to Oxford Academic.When on the institution site, please use the credentials provided by your institution.Select your institution from the list provided, which will take you to your institution's website to sign in.Click Sign in through your institution.Shibboleth / Open Athens technology is used to provide single sign-on between your institution’s website and Oxford Academic. This authentication occurs automatically,Īnd it is not possible to sign out of an IP authenticated account.Ĭhoose this option to get remote access when outside your institution. Typically, access is provided across an institutional network to a range of IP addresses. If you are a member of an institution with an active account, you may be able to access content in the following ways: Get help with access Institutional accessĪccess to restricted content on Oxford Academic is often provided through institutional subscriptions and purchases. The obtained results provide fundamental information for analysing the degradation of sloped terrain on planetary surfaces, such as crater-shape degradation due to the accumulation of micro-impacts. This result is consistent with a previous study that considered the effect of asymmetric ejecta deposition. We find that the centroid migration distance x mig normalized to the crater minor-axis diameter D cy can be expressed as a function of the initial inclination of the target tan θ, the effective friction coefficient μ, and two parameters K and c that characterize the asymmetric ejecta deposition and oblique impact effect: x mig/ D cy = K tan θ/ + c, where K = 0.6, μ = 0.8, and c = −0.1 to 0.3.
Using the experimental results of a solid projectile impact on an inclined dry-sand layer, we measure the distance of centroid migration induced by asymmetric cratering. Owing to asymmetric ejecta deposition followed by landsliding, the slope of the impacted inclined surface can be relaxed. For a fundamental understanding of terrain relaxation occurring on sloped surfaces of terrestrial bodies, we analyse the crater shape produced by an impact on an inclined granular (dry-sand) layer.