Towards defining semantic foundations for purpose-based privacy policies

We define a semantic model for purpose, based on which purpose-based privacy policies can be meaningfully expressed and enforced in a business system. The model is based on the intuition that the purpose of an action is determined by its situation among other inter-related actions. Actions and their relationships can be modeled in the form of an action graph which is based on the business processes in a system. Accordingly, a modal logic and the corresponding model checking algorithm are developed for formal expression of purpose-based policies and verifying whether a particular system complies with them. It is also shown through various examples, how various typical purpose-based policies as well as some new policy types can be expressed and checked using our model

Rotational properties of the Haumea family members and candidates: Short-term variability

Haumea is one of the most interesting and intriguing transneptunian objects (TNOs). It is a large, bright, fast rotator, and its spectrum indicates nearly pure water ice on the surface. It has at least two satellites and a dynamically related family of more than ten TNOs with very similar proper orbital parameters and similar surface properties. The Haumean family is the only one currently known in the transneptunian belt. Various models have been proposed but the formation of the family remains poorly understood. In this work, we have investigated the rotational properties of the family members and unconfirmed family candidates with short-term variability studies, and report the most complete review to date. We present results based on five years of observations and report the short-term variability of five family members, and seven candidates. The mean rotational periods, from Maxwellian fits to the frequency distributions, are 6.27+/-1.19 h for the confirmed family members, 6.44+/-1.16 h for the candidates, and 7.65+/-0.54 h for other TNOs (without relation to the family). According to our study, there is a suggestion that Haumea family members rotate faster than other TNOs, however, the sample of family member is still too limited for a secure conclusion. We also highlight the fast rotation of 2002 GH32. This object has a 0.36+/-0.02 mag amplitude lightcurve and a rotational period of about 3.98 h. Assuming 2002 GH32 is a triaxial object in hydrostatic equilibrium, we derive a lower limit to the density of 2.56 g cm^-3. This density is similar to Haumea's and much more dense than other small TNO densities.Comment: Accepted for publication, A

Implementing Trusted Terminals with a and SITDRM

AbstractThe SITDRM Enterprise system [N. Sheppard, R. Safavi-Naini “Protecting Privacy with the MPEG-21 IPMP Framework”. International Workshop on Privacy Enhancing Technologies 2006, pp. 152–171] protects private customer data by allowing customers to provide policies in the form of a machine-readable license. When employees of an organization want to use customers' data, they must be forced to abide by the licences provided. Some sort of hardened terminal must be used to ensure that not only the hardware and software will cooperate, but that the user of the terminal will too. We use the Trusted Computing Group's specifications for a trusted platform upon which to build a data user terminal that can be proved to implement correct license-enforcing behavior. A Trusted Platform Module (TPM) and a TPM-using operating system are all that may be required to construct a verifiably secure terminal

On multiple watermarking

Mintzer and Braudaway once asked: If one watermark is good, are more better? In this paper, we discuss some techniques for embedding multiple watermarks into a single multimedia object and report some observations on implementations of these techniques

Sources of Variability in Iso-inertial Jump Assessments

Purpose: This investigation aimed to quantify the typical variation for kinetic and kinematic variables measured during loaded jump squats. Methods: Thirteen professional athletes performed six maximal effort countermovement jumps on fouroccasions. Testing occurred over 2 d, twice per day (8 AM and 2 PM) separated by 7 d, with the same procedures replicated on each occasion. Jump height, peak power (PP), relative peak power (RPP), mean power (MP), peak velocity (PV), peak force (PF), mean force (MF), and peak rate of force development (RFD) measurements were obtained from a linear optical encoder attached to a 40 kg barbell. Results: A diurnal variation in performance was observed with afternoon values displaying an average increase of 1.5-5.6% for PP, RPP, MP, PV, PF, and MF when compared with morning values (effect sizes ranging from 0.2-0.5). Day to day reliability was estimated by comparing the morning trials (AM reliability) and the afternoon trials (PM reliability). In both AM and PM conditions, all variables except RFD demonstrated coefficients of variations ranging between 0.8-6.2%. However, for a number of variables (RPP, MP, PV and height), AM reliability was substantially better than PM. PF and MF were the only variables to exhibit a coefficient of variation less than the smallest worthwhile change in both conditions. Discussion: Results suggest that power output and associated variables exhibit a diurnal rhythm, with improved performance in the afternoon. Morning testing may be preferable when practitioners are seeking to conduct regular monitoring of an athlete\u27s performance due to smaller variabilit

Planning for the future- Response from the UWE Bristol Planning School and Centre for Sustainable Planning and Environments

A response to the consultation attached to Planning For the Future (https://www.gov.uk/government/consultations/planning-for-the-future

The 2016 Reactivations of Main-Belt Comets 238P/Read and 288P/(300163) 2006 VW139

We report observations of the reactivations of main-belt comets 238P/Read and 288P/(300163) 2006 VW139, that also track the evolution of each object's activity over several months in 2016 and 2017. We additionally identify and analyze archival SDSS data showing 288P to be active in 2000, meaning that both 238P and 288P have now each been confirmed to be active near perihelion on three separate occasions. From data obtained of 288P from 2012-2015 when it appeared inactive, we find best-fit R-band H,G phase function parameters of H_R=16.80+/-0.12 mag and G_R=0.18+/-0.11, corresponding to effective component radii of r_c=0.80+/-0.04 km, assuming a binary system with equally-sized components. Fitting linear functions to ejected dust masses inferred for 238P and 288P soon after their observed reactivations in 2016, we find an initial average net dust production rate of 0.7+/-0.3 kg/s and a best-fit start date of 2016 March 11 (when the object was at a true anomaly of -63 deg) for 238P, and an initial average net dust production rate of 5.6+/-0.7 kg/s and a best-fit start date of 2016 August 5 (when the object was at a true anomaly of -27 deg) for 288P. Applying similar analyses to archival data, we find similar start points for previous active episodes for both objects, suggesting that minimal mantle growth or ice recession occurred between the active episodes in question. Some changes in dust production rates between active episodes are detected, however. More detailed dust modeling is suggested to further clarify the process of activity evolution in main-belt comets.Comment: 21 pages, 9 figures, accepted by A

The role of government: Australian and international views on what government should do

This paper uses data from the 26th ANUPoll, conducted in August 2018, to analyse opinion about a range of roles that government could be responsible for, who should deliver services and who should pay for them. Australians generally think that the government has an important role to play in many aspects of society, with the greatest support for health care for the sick, controlling Australia's borders and supporting the elderly. The lowest level of support was for providing a decent standard of living for the unemployed, providing a job for everyone who wants one and providing decent housing. Some comparisons are also made between Australian attitudes and those in selected other Organisation for Economic Co-operation and Development countries, as well as how attitudes vary within the Australian population

The social determinants of health and subjective wellbeing: a comparison of probability and nonprobability online panels

As response rates to surveys decline all over the world, researchers are increasingly turning to sampling frames that are easier and cheaper to reach, and that have more predictable response rates. These include nonprobability web panels (NWPs) and probability web panels (PWPs). Although generally more expensive to construct, the latter have been shown in many instances to suffer from fewer biases and deviation from benchmarks. The literature comparing NWPs with PWPs is fedgling. We add to this research area by comparing measures of the social determinants of health that were estimated from a number of NWPs and PWP equivalents with a high-quality benchmark. The analysis finds that, when looking at the distributions of self- assessed health and life satisfaction, probability panels differ less from the gold standard than do nonprobability panels. This supports previous work, although we also show that this conclusion holds when a greater range of control variables is included in the model. However, some of the predictors of health are captured better using the nonprobability panels. In particular, the relationship between area-level disadvantage and health is better captured through a pooled nonprobability sample

The best of times, the worst of times, or indifferent times: views of Australians on job security and the future of work

The Australian labour market is changing, with new occupations being created, as others become more precarious. Some of this change is being driven by technological advances; some is due to external factors. Although there has been a considerable amount of research documenting this change and predicting what the labour market will look like in the future, there has been far less research looking at the attitudes of current workers towards their own jobs now and in the future. In this paper, we summarise and analyse a specially targeted survey (the 25th in the ANUPoll series) that looks at the attitudes of a representative sample of the Australian population, and test how these attitudes vary by important demographic, geographic and socioeconomic characteristics. We document different aspects of job security: perceptions of job security in Australia, including by industry; categorisation of different threats to job security; and perceived longer-term changes in work and society. We also undertake a randomised survey experiment that tests for the role of sex, ethnicity and qualifications in how people perceive medium-term labour market change, and compare these results with the views of 'experts'. We show that Australians are relatively relaxed about their current job and are somewhat concerned about finding a new job if they lost theirs, and that the general public has somewhat different views on what jobs are most at risk compared with experts