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Behavioural insights

Arran Hamlet, Kévin Jean, William Perea, Sergio Yactayo, Joseph Biey, Maria Van Kerkhove, Neil Ferguson, Tini Garske
BACKGROUND: Yellow fever virus (YFV) is a vector-borne flavivirus endemic to Africa and Latin America. Ninety per cent of the global burden occurs in Africa where it is primarily transmitted by Aedes spp, with Aedes aegypti the main vector for urban yellow fever (YF). Mosquito life cycle and viral replication in the mosquito are heavily dependent on climate, particularly temperature and rainfall. We aimed to assess whether seasonal variations in climatic factors are associated with the seasonality of YF reports...
March 2018: PLoS Neglected Tropical Diseases
S E R Lim, R Dodds, D Bacon, A A Sayer, H C Roberts
BACKGROUND: Few studies have explored the activity levels of hospitalised older people and the intra-daily activity patterns in this group have not been described. AIMS: To describe the quantity and daily pattern of physical activity among hospitalised older people using two accelerometers: the ankle-worn StepWatch Activity Monitor (SAM), and the wrist-worn GENEActiv. METHODS: This cross-sectional observational study was conducted on the acute medical wards for older people in one UK hospital...
March 14, 2018: Aging Clinical and Experimental Research
Alejandro Arenas-Pinto, Birgit Grund, Shweta Sharma, Esteban Martinez, Nathan Cummins, Julie Fox, Karin L Klingman, Dalibor Sedlacek, Simon Collins, Patricia M Flynn, William M Chasanov, Eynat Kedem, Christine Katlama, Juan Sierra-Madero, Claudia Afonso, Pim Brouwers, David A Cooper
Background: Randomized trials have shown increased risk of suicidality associated with efavirenz (EFV). The START (Strategic Timing of Antiretroviral Treatment) trial randomized treatment-naive human immunodeficiency virus (HIV)-positive adults with high CD4 cell counts to immediate vs deferred antiretroviral therapy (ART). Methods: The initial ART regimen was selected prior to randomization (prespecified). We compared the incidence of suicidal and self-injurious behaviours (suicidal behavior) between the immediate vs deferred ART groups using proportional hazards models, separately for those with EFV and other prespecified regimens, by intention to treat, and after censoring participants in the deferred arm at ART initiation...
March 12, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Jana Declercq, Stéphan Tulkens, Sarah Van Leuven
This article examines the Twitter and Facebook uptake of health messages from an infotainment TV show on food, as broadcasted on Belgium's Dutch-language public broadcaster. The interest in and amount of health-related media coverage is rising, and this media coverage is an important source of information for laypeople, and impacts their health behaviours and therapy compliance. However, the role of the audience has also changed; consumers of media content increasingly are produsers, and, in the case of health, expert consumers...
March 1, 2018: Health (London)
Staffan Jacob, Louis Sallé, Lucie Zinger, Alexis S Chaine, Christine Ducamp, Léa Boutault, Andrew F Russell, Philipp Heeb
The microbiota has a broad range of impacts on host physiology and behaviour, pointing out the need to improve our comprehension of the drivers of host microbiota composition. Of particular interest is whether the microbiota is acquired passively, or whether and to what extent hosts themselves shape the acquisition and maintenance of their microbiota. In birds, the uropygial gland produces oily secretions used to coat feathers that have been suggested to act as an antimicrobial defence mechanism regulating body feather microbiota...
March 13, 2018: Molecular Ecology
Adriana A Maldonado-Chaparro, Pierre-Olivier Montiglio, Wolfgang Forstmeier, Bart Kempenaers, Damien R Farine
Variation in extra-pair paternity (EPP) among individuals of the same population could result from stochastic demography or from individual differences in mating strategies. Although the adaptive value of EPP has been widely studied, much less is known about the characteristics of the social environment that drive the observed patterns of EPP. Here, we demonstrate how concepts and well-developed tools for the study of social behaviour (such as social network analysis) can enhance the study of extra-pair mating decisions (focussing in particular on avian mating systems)...
March 13, 2018: Biological Reviews of the Cambridge Philosophical Society
Saeed Rismani Yazi, Reza Nosrati, Corey A Stevens, David Vogel, Carlos Escobedo
Magnetotactic bacteria (MTB) migrate in complex porous sediments where fluid flow is ubiquitous. Here, we demonstrate that magnetotaxis enables MTB to migrate effectively through porous micromodels. Directed MTB can circumvent curved obstacles by traveling along the boundaries and pass flat obstacles by repeatedly switching between forward and backward runs. Magnetotaxis enables directed motion of MTB through heterogeneous porous media, overcoming tortuous flow fields with local velocities as high as 250  μ m s-1 ...
January 2018: Biomicrofluidics
Edward H Reynolds
The word hysteria originated in the Corpus Hippocraticum (c420 BCE) as a natural explanation for a variety of diseases in women linked in the Greco-Roman mind to an animate or inanimate womb, but which in the last five centuries has evolved to describe an elusive disorder of brain ± mind in men and women, currently referred to by neurologists as "functional neurological disorder". The Babylonians, Assyrians and Egyptians had no knowledge of brain or psychological function. Babylonian and Assyrian descriptions of disease and behaviour include only rare examples suggestive of modern hysteria...
February 17, 2018: Journal of the Neurological Sciences
Ruth Bowness, Mark A J Chaplain, Gibin G Powathil, Stephen H Gillespie
If improvements are to be made in tuberculosis (TB) treatment, an increased understanding of disease in the lung is needed. Studies have shown that bacteria in a less metabolically active state, associated with the presence of lipid bodies, are less susceptible to antibiotics, and recent results have highlighted the disparity in concentration of different compounds into lesions. Treatment success therefore depends critically on the responses of the individual bacteria that constitute the infection. We propose a hybrid, individual-based approach that analyses spatio-temporal dynamics at the cellular level, linking the behaviour of individual bacteria and host cells with the macroscopic behaviour of the microenvironment...
March 7, 2018: Journal of Theoretical Biology
T J Beyene, M C M Mourits, C W Revie, H Hogeveen
The objective of this study was to identify factors that determine medical treatment seeking behaviour following potential rabies exposure after being bitten by a suspected dog and the likelihood of compliance to receive sufficient doses of post-exposure prophylaxis after the visit to a health centre visit. A detailed survey based on case investigation was conducted on suspected rabid dog bite cases in three areas of Ethiopia. Two multivariable logistic regression models were created with a set of putative variables to explain treatment seeking and compliance outcomes...
March 10, 2018: Zoonoses and Public Health
K R Goethals
Personalised medicine promises to provide us with a diagnostic predictive system of stratification that is based on a wide variety of tests; these can include biological, cognitive, demographic, psychopathological tests and other clearly defined tests. The purpose of forensic psychiatry is not only to take care of and treat mentally impaired patients but also to engage in risk assessment and risk management.<br/> AIM: To explain risk assessment in forensic psychiatry as a nomothetic approach to personalised medicine, and also to demonstrate the link with offence paralleling behaviour, which is an illustration of the ideographic approach...
2018: Tijdschrift Voor Psychiatrie
Chunzhen Tan, Edimansyah Abdin, Wilfred Liang, Lye Yin Poon, Ngar Yee Poon, Swapna Verma
AIM: Early intervention programmes for first episode psychosis (FEP) aim to reduce the duration of untreated psychosis (DUP) and improve functional outcomes. The sustained maintenance of improved outcomes depends largely on patients' adherence to prescribed treatment. This paper examines the prevalence of non-adherence in a cohort of patients with FEP and the sociodemographic and clinical factors associated with non-adherent behaviour. METHODS: The sample included consecutive patients accepted from 2007 to 2012 into the Early Psychosis Intervention Programme (EPIP) in Singapore...
March 9, 2018: Early Intervention in Psychiatry
Chiara Berlangieri, Giovanna Poggi, Sergio Murgia, Maura Monduzzi, Luigi Dei, Emiliano Carretti
A dynamic, rheological, and structural characterization of aqueous gel-like systems containing hydroxypropyl guar gum (HPG), borax and glycerol is presented in this paper. The role of glycerol, which is introduced as a plasticizer in the formulation, is investigated by means of11 B NMR and1 H NMR PGSTE measurements in order to clarify its contribution to the gel network formation and its interaction with borax, with whom it forms a complex. The effect of gels components on the rheological behaviour and on the activation energy related to the relaxation process of the system was assessed by means of rheology...
February 13, 2018: Colloids and Surfaces. B, Biointerfaces
Małgorzata Jurak, Robert Mroczka, Rafał Łopucki
Lauryl gallate (LG) is an antioxidant agent. However, it exhibits poor solubility in water. Its interactions with the membrane result in structure evolution thus affecting the membrane functionality. In this paper the Brewster angle microscope coupled with the Langmuir trough was applied to determine the morphology, phase behaviour, thickness and miscibility of ternary Langmuir monolayers with equal mole fractions of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC); 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and an increasing mole fraction of LG...
March 7, 2018: Journal of Membrane Biology
Andrea Baronchelli
The origin of population-scale coordination has puzzled philosophers and scientists for centuries. Recently, game theory, evolutionary approaches and complex systems science have provided quantitative insights on the mechanisms of social consensus. However, the literature is vast and widely scattered across fields, making it hard for the single researcher to navigate it. This short review aims to provide a compact overview of the main dimensions over which the debate has unfolded and to discuss some representative examples...
February 2018: Royal Society Open Science
Ian D Johnson, Thomas E Ashton, Ekaterina Blagovidova, Glen J Smales, Mechthild Lübke, Peter J Baker, Serena A Corr, Jawwad A Darr
The Li+ ion diffusion characteristics of V- and Nb-doped LiFePO4 were examined with respect to undoped LiFePO4 using muon spectroscopy (µSR) as a local probe. As little difference in diffusion coefficient between the pure and doped samples was observed, offering DLi values in the range 1.8-2.3 × 10-10  cm2 s-1 , this implied the improvement in electrochemical performance observed within doped LiFePO4 was not a result of increased local Li+ diffusion. This unexpected observation was made possible with the µSR technique, which can measure Li+ self-diffusion within LiFePO4 , and therefore negated the effect of the LiFePO4 two-phase delithiation mechanism, which has previously prevented accurate Li+ diffusion comparison between the doped and undoped materials...
March 7, 2018: Scientific Reports
Christian E Vincenot
Progress in understanding and managing complex systems comprised of decision-making agents, such as cells, organisms, ecosystems or societies, is-like many scientific endeavours-limited by disciplinary boundaries. These boundaries, however, are moving and can actively be made porous or even disappear. To study this process, I advanced an original bibliometric approach based on network analysis to track and understand the development of the model-based science of agent-based complex systems (ACS). I analysed research citations between the two communities devoted to ACS research, namely agent-based (ABM) and individual-based modelling (IBM)...
March 14, 2018: Proceedings. Biological Sciences
Katherine Ann Thurber, Grace Joshy, Rosemary Korda, Sandra J Eades, Vicki Wade, Hilary Bambrick, Bette Liu, Emily Banks
BACKGROUND: High body mass index (BMI) is the second leading contributor to Australia's burden of disease and is particularly prevalent among Aboriginal peoples. This paper aims to provide insight into factors relating to obesity among Aboriginal adults and Aboriginal-non-Aboriginal differences. METHODS: Cross-sectional analysis of data from the 45 and Up Study, comparing obesity (BMI ≥30 kg/m2 ) prevalence and risk factors among 1515 Aboriginal and 213 301 non-Aboriginal adults in New South Wales...
March 7, 2018: Journal of Epidemiology and Community Health
Sabrina N Linn, Michael Boeer, Marina Scheumann
Describing vocal repertoires represents an essential step towards gaining an overview about the complexity of acoustic communication in a given species. The analysis of infant vocalisations is essential for understanding the development and usage of species-specific vocalisations, but is often underrepresented, especially in species with long inter-birth intervals such as the white rhinoceros. Thus, this study aimed for the first time to characterise the infant and juvenile vocal repertoire of the Southern white rhinoceros and to relate these findings to the adult vocal repertoire...
2018: PloS One
Yuan Cao, Valla Fatemi, Shiang Fang, Kenji Watanabe, Takashi Taniguchi, Efthimios Kaxiras, Pablo Jarillo-Herrero
The behaviour of strongly correlated materials, and in particular unconventional superconductors, has puzzled physicists for decades. Such difficulties have stimulated new research paradigms, such as ultracold atom lattices for simulating quantum materials. Here we report on the realization of intrinsic unconventional superconductivity in a two-dimensional superlattice created by stacking two graphene sheets with a small twist angle. For angles near 1.1°, the first 'magic' angle, twisted bilayer graphene exhibits ultraflat bands near charge neutrality, which lead to correlated insulating states at half-filling...
March 5, 2018: Nature
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