Adrian B. Johnston

Learn More
OBJECTIVE To compare newborn outcomes and costs of hospital stays for twins born to mothers receiving care in a specialized twin clinic with a research-based care protocol and one consistent caregiver versus twins whose mothers received standard prenatal care. DESIGN AND SETTING A retrospective, historical cohort study conducted in a high-risk obstetric(More)
sponse is sporadical, with a latency of about 2.2 ms. This fact implies that the excitatory inputs f rom the contralateral cercal sensory nerves are transmitted polysynaptically to the medial giant interneuron. It was therefore concluded that the second type of LNIs mediate the transmission of mechanical information f rom the contralateral cercal sensory(More)
The nature of a biomaterial surface governs the processes involved in biological response. Surface properties such as surface chemistry, surface energy, and morphology may be measured in order to understand the surface region of a biomaterial. In this article, we describe the surface characteristics of a few common biomaterials, review the techniques used(More)
The stray field, magnetic microstructure, and switching behavior of high-resolution electron beam fabricated thin film tips for magnetic force microscopy ~MFM! are investigated with different imaging modes in a transmission electron microscope ~TEM!. As the tiny smooth carbon needles covered with a thermally evaporated magnetic thin film are transparent to(More)
Semiconductor fabrication involves several sequential processing steps with the result that critical production variables are often affected by a superposition of affects over multiple steps. In this paper a Virtual Metrology (VM) system for early stage measurement of such variables is presented; the VM system seeks to express the contribution to the output(More)
Process monitoring and Predictive Maintenance (PdM) are gaining increasing attention in most manufacturing environments as a means of reducing maintenance related costs and downtime. This is especially true in industries that are data intensive such as semiconductor manufacturing. In this paper an adaptive PdM based flexible maintenance scheduling decision(More)
In the semiconductor manufacturing environment it is very important to understand which factors have the most impact on process outcomes and to control them accordingly. This is usually achieved through design of experiments at process start-up and long term observation of production. As such it relies heavily on the expertise of the process engineer. In(More)
  • 1