Publications by authors named "J Mithen"

Issue Addressed: To explore insights and perspectives of a collective impact (CI) partnership taking on a new project that aimed to reduce sugary drink consumption and promote water as the drink of choice across North East Melbourne.

Methods: A qualitative case study was undertaken. Semi-structured interviews were conducted with key stakeholders in the partnership.

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We present results of computer simulations of homogeneous crystal nucleation in the Gaussian core model. In our simulations, we study the competition between the body-centered-cubic (bcc), face-centered-cubic (fcc), and hexagonal-close-packed crystal phases. We find that the crystal nuclei that form from the metastable fluid phase are typically "mixed"; they do not consist of a single crystal polymorph.

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The poor mental and physical health of people with disabilities has been well documented and there is evidence to suggest that inequalities in health between people with and without disabilities may be at least partly explained by the socioeconomic disadvantage (e.g. low education, unemployment) experienced by people with disabilities.

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We investigate subpicosecond dynamics of warm dense hydrogen at the XUV free-electron laser facility (FLASH) at DESY (Hamburg). Ultrafast impulsive electron heating is initiated by a ≤ 300-fs short x-ray burst of 92-eV photon energy. A second pulse probes the sample via x-ray scattering at jitter-free variable time delay.

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Article Synopsis
  • The study investigates how ultrafast heating occurs in cryogenic hydrogen when exposed to a short (less than 300 fs) 92 eV x-ray pulse.
  • The results show that the transition from dense molecular hydrogen to a plasmalike state happens within approximately 0.9 picoseconds, suggesting how quickly the electrons and ions reach equilibrium.
  • These findings align with radiation hydrodynamics simulations that utilize a conductivity model for partially ionized plasma, further supported by density-functional theory.
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