Predicting mobile advertising response using consumer colocation networks

Building on results from economics and consumer behavior, the authors theorize that consumers' movement patterns are informative of their product preferences, and this study proposes that marketers monetize this information using dynamic networks that capture colocation events (when consumers appear at the same place at approximately the same time). To support this theory, the authors study mobile advertising response in a panel of 217 subscribers. The data set spans three months during which participants were sent mobile coupons from retailers in various product categories through a smartphone application. The data contain coupon conversions, demographic and psychographic information, and information on the hourly GPS location of participants and on their social ties in the form of referrals. The authors find a significant positive relationship between colocated consumers' response to coupons in the same product category. In addition, they show that incorporating consumers' location information can increase the accuracy of predicting the most likely conversions by 19%. These findings have important practical implications for marketers engaging in the fast-growing location-based mobile advertising industry

Agenda chasing and contests among news providers

This article studies competition in contests with a focus on the news industry that is increasingly influenced by social media. The model assumes publishers to pick a single topic from a large pool based on the topics' prior “success” probabilities, thereby “chasing” potentially successful topics. Firms that publish topics that become successful divide a “reward” which can change with the number of competing firms and the number of successful topics. The results show that share structures can be categorized into three types that, in turn, lead to qualitatively different outcomes for the contest

Two-colorings with many monochromatic cliques in both colors

Color the edges of the n-vertex complete graph in red and blue, and suppose that red k-cliques are fewer than blue k-cliques. We show that the number of red k-cliques is always less than cknk, where ck∈(0, 1) is the unique root of the equation zk=(1-z)k+kz(1-z)k-1. On the other hand, we construct a coloring in which there are at least cknk-O(nk-1) red k-cliques and at least the same number of blue k-cliques. © 2013 Elsevier Inc

The AdHOC study of older adults’ adherence to medication in 11 countries

BACKGROUND: Compared with the resources expended developing, evaluating and making clinical decisions about prescribing medication, we know little about what determines whether people take it. Older adults are prescribed more medication than any other group. Poor adherence is a common reason for nonresponse to medication. OBJECTIVES: To investigate cross-nationally the impact of demographic, psychiatric (including cognitive), physical health, behavioural and medication factors on adherence to medication in older adults. METHODS: Researchers interviewed 3881 people over 65 who receive home care services using a structured interview at participants’ places of residence in eleven countries. The main outcome measure was the percentage participants not adherent to medication. RESULTS: 12.5% (n= 456) of people reported they were not fully adherent to medication. Non-adherence was predicted by problem drinking (OR=3.6), not having a doctor review medication (OR=3.3), dementia (OR=1.4 for every one point increase in impairment), good physical health (OR=1.2), resisting care (OR=2.1) being married (OR=2.3) and living in the Czech Republic (OR=4.7) or Germany (OR=1.4). CONCLUSION: People, who screen positive for problem drinking and with dementia, often undiagnosed are less likely to adhere to medication. Therefore doctors should consider dementia and problem drinking when prescribing for older adults. Interventions to improve adherence in older adults might be more effective if 4 targeted at these groups. It is possible that medication review enhances adherence, by improving the patient-doctor relationship, or by emphasising the relevance of medications

Centrosymmetric graphs and a lower bound for graph energy of fullerenes

The energy of a molecular graph G is defined as the summation of the absolute values of the eigenvalues of adjacency matrix of a graph G. In this paper, an infinite class of fullerene graphs with 10n vertices, n ≥ 2, is considered. By proving centrosymmetricity of the adjacency matrix of these fullerene graphs, a lower bound for its energy is given. Our method is general and can be extended to other class of fullerene graphs

Molecular Topology 22.1 Novel Connectivity Descriptors Based on Walk Degrees

An algorithm for generating novel connectivity topological descriptors, denoted SP (subgraph property), is proposed and exemplified for P being the number of vertices N, walk degree wt\u27e), Randić index X, and Wiener index W. SP indices based on wt\u27e) and x wt\u27e) (Razinger\u27s extension of x index) are tested for correlation with some physico-chemical properties of octane isomers

Improvement of local Resistance of Safety-Related Structures and Reduction of Dynamic Response due to Missile Impact Loading

Evaluation of the load-bearing and shielding capacity of safety-related structures not designed for missile impact loading (e.g. from aircraft crash) led to problem-specific investigations, conducted with the aim of establishing effective shielding, reinforcing and energy dissipation concepts. To ensure protection of structures against missile impact, emphasis was placed in this study not only on upgrading the penetration resistance of the structures in the impacted area, but also in particular on reducing the dynamic response induced by impact loads. Although a number of shielding concepts exist which are useful in a theoretical sense, only a few of these are of any practical significance due to the rather small region affected by impact loading and the rather high magnitude of the loads. Any shielding concept suitable for protecting a building against the impact of a missile (e.g. aircraft) over its entire outer surface must provide the target with homogeneous protection in the form of a jacket of high strength and high energy dissipation capacity. Of the various concepts investigated, the most promising seems to be that providing protection by means of hollow-wall designs or special shielding elements, both made of energy-absorbing high-quality steel-fiberreinforced concrete [1]. This paper covers studies of different local design concepts for the targeted regions and material parameters which have a strong influence on the penetration resistance as well as energy dissipation capabilities of the impacted building. Possibilities for reinforcing the outer shells of typical buildings not originally designed to withstand missile impact are also presented

Mental health of forced migrants recently granted leave to remain in the United Kingdom

Background: Asylum seekers who are granted leave to remain in the United Kingdom are required to make a rapid transition to housing and welfare benefits. The challenges facing new refugees during this ‘transition period’ can affect their mental health, but this has not been quantified. Aims: To assess the impact of the transition period on new refugees’ mental health in the 12 months after being granted leave to remain in the United Kingdom. Method: A longitudinal survey design was used to measure the mental health of 30 newly recognised refugees at monthly intervals in the first 6 months and again at 1 year after receiving leave to remain in the United Kingdom. There were five outcome measures for symptoms of anxiety, depression, distress, post-traumatic stress disorder (PTSD), post-migration living difficulties (PMLD) and a life events calendar to record key changes in housing and welfare. Results: The results showed that the trajectory of scores across all measures fluctuates, but overall they all improve from baseline to Month 12. Scores for depression and PMLD showed significant improvement at Month 5, and scores for anxiety, depression, distress and PMLD showed significant improvement at Month 12. PTSD scores did not show significant improvement at any month. In months with a high number of stressful life events, participants had worse PMLD and PTSD scores. Conclusion: Overall improvement in mental health could partly be explained by the stability of being granted leave to remain in the United Kingdom, but may also be due to the high level of practical support these participants received. Recommendations are made for those working with clients during the transition period