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open access

Artificially Structured Boundary for a high purity ion trap or ion source

Description: This article proposes a plasma enclosed by an Artificially Structured Boundary (ASB) as an alternative to existing ion source assemblies. In accelerator applications, many ion sources can have a limited lifetime or frequent service intervals due to sputtering and eventual degradation of the ion source assembly. Ions are accelerated towards the exit canal of positive ion sources, whereas, due to the biasing scheme, electrons or negative ions are accelerated towards the back of the ion source ass… more
Date: August 1, 2014
Creator: Pacheco, J. L.; Ordonez, Carlos A. & Weathers, Duncan L.
open access

Phase space of positron trajectories exiting a charged particle source through a magnetic field point cusp

Description: This article presents a configuration of magnetic fields using properties of cylindrically symmetric permanent magnets as a candidate to produce a high purity charged particle source or trap. Cylindrically symmetric hollow permanent magnets produce magnetic field point cusps on the axis of symmetry. A magnetic field point cusp reflects all particles that lie outside a narrow region of phase space, a region dependent on particle kinetic energies and on the magnetic field intensity.
Date: August 1, 2014
Creator: Kiester, A. S.; Pacheco, J. L.; Ordonez, Carlos A. & Weathers, Duncan L.
open access

Negative Regulation of Signal Transducer and Activator of Transcription-3 Signalling Cascade by Lupeol Inhibits Growth and Induces Apoptosis in Hepatocellular Carcinoma Cells

Description: In this article, the authors evaluate the effect of lupeol on STAT3 signalling cascade and its regulated functional responses in hepatocellular carcinoma (HCC) cells. Constitutive activation of signal transducer and activator of transcription signalling 3 (STAT3) has been linked with survival, proliferation and angiogenesis in a wide variety of malignancies including HCC. Lupeol exhibited its potential anticancer effects in HCC through the downregulation of STAT3-induced pro-survival signalling… more
Date: August 7, 2014
Creator: Siveen, Kodappully Sivaraman; Nguyen, An H.; Lee, J. H.; Li, Feng; Singh, S. S.; Kumar, Alan Prem et al.
open access

Inverted Social Reward: Associations between Psychopathic Traits and Self-Report and Experimental Measures of Social Reward

Description: This article describes two studies of individuals with high levels of psychopathic traits. Study 1 explores what aspects of social reward are associated with psychopathic traits, and Study 2 administers these measures to a new group of participants along with two experimental tasks investigating monetary and social reward value.
Date: August 27, 2014
Creator: Foulkes, Lucy; McCrory, Eamon J.; Neumann, Craig S. & Viding, Essi
open access

Magnetobound positronium and protonium

Description: This article investigates the formation of magnetobound positronium and protonium via classical trajectory simulations of binary point charge interactions in an external magnetic field. The results of computer simulations of the fully three-dimensional trajectories of classical and non-relativistic point charges with the same mass, equal charge magnitude, and opposite sign are reported. The simulations show the formation of magnetobound positronium and protonium. The results yield formation cro… more
Date: August 27, 2014
Creator: Correa, J. R. & Ordonez, Carlos A.
open access

Patrones Estacionales Y Espaciales De La Diversidad De Moluscos Intermareales De Bahía RóBalo, Canal Beagle, Reserva De La Biosfera Cabo De Hornos, Chile

Description: This article characterizes molluscs assemblages in Róbalo bay, identifying spatial-temporal changes in assemblage composition, species richness, abundance, functional groups, and diversity of molluscs species.
Date: August 28, 2014
Creator: Ojeda, Jaime; Rosenfeld, Sebastián; Marambio, Johanna; Rozzi, Ricardo, 1960- & Mansilla, Andrés O.
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