Trails of experiences: Navigating personal memories

Systems to augment personal information aim to support people in remembering both past experiences and specific information associated with past experiences. These types of information go beyond those supported in systems for Personal Information Management, making it necessary to develop new user interface and interaction techniques. Our approach is based on characteristics of human memory. Its major contribution is the combination of a graph-based data model with navigation mechanisms based on various types of context and on associations

Binary Systematic Network Coding for Progressive Packet Decoding

We consider binary systematic network codes and investigate their capability of decoding a source message either in full or in part. We carry out a probability analysis, derive closed-form expressions for the decoding probability and show that systematic network coding outperforms conventional network coding. We also develop an algorithm based on Gaussian elimination that allows progressive decoding of source packets. Simulation results show that the proposed decoding algorithm can achieve the theoretical optimal performance. Furthermore, we demonstrate that systematic network codes equipped with the proposed algorithm are good candidates for progressive packet recovery owing to their overall decoding delay characteristics.Comment: Proc. of IEEE ICC 2015 - Communication Theory Symposium, to appea

Cement of Our Union: Hamilton, the Treasury, and the Federalist Party

This thesis examines the impact of Alexander Hamilton and the policies he proposed and implemented as Secretary of the Treasury on the emergence and rise of the Federalist Party. This was achieved both by examination of the content of Hamilton’s financial plans as well as the responses they provoked. Both the support of fellow Federalists and the opposition of those who eventually became the Democratic-Republicans provide insight into the forces driving the partisan split. Information was drawn from both primary and secondary sources, including the writings of Hamilton and his contemporaries as well as subsequent studies of his life and work. The evidence of these sources points to a substantial role for Hamilton in the timing and nature of the formation of the Federalist Party in addition to its political positions. His vision of a unified republic built on a strong commercial foundation set the trajectory for the party and for the nation as a whole

Reviews

Danny Saunders and Nina Smalley (eds.), The International Simulation and Gaming Research Yearbook — Volume 8: Simulations and Games for Transition and Change, London: Kogan Page, 2000. ISBN: 0–7494–3397–3. Hardback, viii+271 pages, £40.00

The Dory Fleet of Pacific City: An Annotated Bibliography

This annotated bibliography has been created as part of the Launching through the Surf: The Dory Fleet of Pacific City project. Kathleen Spring, Brenda DeVore Marshall, Andrea Snyder, Mary Beth Jones, Alicia Schnell, and Gabrielle Leif have contributed to the document. Many of the articles and other documents were found in personal scrapbooks and files. In many cases, the bibliographic information is incomplete. Research is ongoing, and the bibliography will be updated as additional information becomes available

Hydrodynamics of Cloud Collisions in 2D: The Fate of Clouds in a Multi-phase Medium

We have studied head-on collisions between equal-mass, mildly supersonic (Mach number 1.5) HI clouds, in a standard Two-phase ISM (T_cl = 74 K, n_cl = 22 cm^-3, \chi = 100). We explore the role of various factors, including the radiative cooling parameter \eta = t_rad/t_coll (t_coll=R_c/v_c), evolutionary modifications on the cloud structure (by colliding clouds ``evolved'' through independent motion within the intercloud medium (WIM)), and the symmetry of the problem (by colliding initially identical clouds, evolved to different ages before impact). The presence of bow shocks and ram pressure from material in the cloud wake, developed during such evolution through the WIM, significantly alters these interactions with respect to the standard case of non-evolved clouds. In general, in our adiabatic collisions the clouds are disrupted and convert their gas into a few low density contrast clumps. By contrast, for symmetric radiative cases we find that the two clouds coalesce, with almost all the initial kinetic energy radiated away. On the other hand, for both adiabatic and radiative collisions, asymmetric collisions have a much greater tendency to disrupt the two clouds. Fragmentation of the clouds may occur, and instabilities are in general enhanced. In addition, radiative cooling is less efficient in our asymmetric interactions, so that those parts of the clouds that initially seem to merge are more likely to re-expand and fade into the WIM. Since the majority of real cloud collisions should be asymmetric for one reason or another, we conclude that most gasdynamical diffuse cloud collisions will be disruptive, at least in the absence of significant self-gravity or of a significant magnetic field.Comment: Revised version, published in The Astrophysical Journal; 26 pages Latex + 9 figures, mpeg animations available at http://www.msi.umn.edu/Projects/twj/Cloud-Collision.htm

Optimized Network-coded Scalable Video Multicasting over eMBMS Networks

Delivery of multicast video services over fourth generation (4G) networks such as 3GPP Long Term Evolution-Advanced (LTE-A) is gaining momentum. In this paper, we address the issue of efficiently multicasting layered video services by defining a novel resource allocation framework that aims to maximize the service coverage whilst keeping the radio resource footprint low. A key point in the proposed system mode is that the reliability of multicast video services is ensured by means of an Unequal Error Protection implementation of the Network Coding (UEP-NC) scheme. In addition, both the communication parameters and the UEP-NC scheme are jointly optimized by the proposed resource allocation framework. Numerical results show that the proposed allocation framework can significantly increase the service coverage when compared to a conventional Multi-rate Transmission (MrT) strategy.Comment: Proc. of IEEE ICC 2015 - Mobile and Wireless Networking Symposium, to appea

Interrogating the prevention approach of the Housing (Wales) Act 2014 for people with mental health needs who are homeless

Rates of homelessness and poor mental health present significant challenges across the globe. In this article, we explore how these intersecting issues have been addressed in Wales through Part 2 of the Housing (Wales) Act 2014 through a paradigm shift towards a prevention model. This article reports findings from a study (conducted between 2016 and 2018) which evaluated the processes and impacts of the Act against the backdrop of welfare reform and systemic changes taking place in Wales and the UK. Using new evidence, we offer a critical examination of how homelessness prevention policy operates in practice and how social values and power affect policy implementation. We offer new evidence of the translation of policy into practice through the experiences of two stakeholder groups: people with mental health needs and service providers. In doing so, we offer a critique of how policy and practice could be modified to improve outcomes for homeless people with implications for prevention policy in Wales and in other contexts and different welfare regimes

Socioeconomic Status, Health and Lifestyle

The role of lifestyle in mediating the relationship between socio-economic characteristics and and health has been discussed extensively in the epidemiological and economic literatures. Previous analyses have not considered a formal framework incorporating unobservable heterogeneity. In this paper we develop a simple economic model in which health is determined (partially) by lifestyle, which depends on preferences, budget and time constraints and unobservable characteristics. We estimate a recursive empirical specification consisting of a health production function and reduced forms for the lifestyle equations using Maximum Simulated Likelihood for a multivariate probit model with discrete indicators of lifestyle choices and self-assessed health (SAH) on British panel data from the 1984 and 1991 Health and Lifestyle Survey. We find that prudent drinking and not smoking in 1984 have dramatic positive effects on the probability of reporting excellent or good SAH in 1991. The failure of epidemiological analyses to account for unobserved heterogeneity can explain their low estimates of the relevance of lifestyle in the socio-economic status-health relationship. Accounting for unobserved heterogeneity also leads us to conclude that indicators for sleep, exercise and breakfast in 1984 are unimportant for SAH in 1991.Determinants of health, lifestyles, simulation-based inference, panel data.