Controllable Laser Ion Acceleration

In this paper a future laser ion accelerator is discussed to make the laser-based ion accelerator compact and controllable. Especially a collimation device is focused in this paper. The future laser ion accelerator should have an ion source, ion collimators, ion beam bunchers, and ion post acceleration devices [Laser Therapy 22, 103(2013)]: the ion particle energy and the ion energy spectrum are controlled to meet requirements for a future compact laser ion accelerator for ion cancer therapy or for other purposes. The energy efficiency from the laser to ions is improved by using a solid target with a fine sub-wavelength structure or a near-critical density gas plasma. The ion beam collimation is performed by holes behind the solid target or a multi-layered solid target. The control of the ion energy spectrum and the ion particle energy, and the ion beam bunching would be successfully realized by a multistage laser-target interaction

Tourist typology in social contact: An addition to existing theories

Tourist-host social contact, as a unique type of social contact, is not getting sufficient attention in tourism academia considering its remarkable impacts on tourists’ travel attitudes, behaviors and long-term perceptions. The objectives of the current study are to explore the dimensions of tourist-host social contact and to contribute to the theory of tourist typology according to their dynamic nature in tourist-host social interaction. Forty-five in-depth interviews were conducted to generate insightful information. The software of NVivo 10 was applied to examine and code the transcripts. As a result, six dimensions were adopted to describe tourist-host social contact, which are purposes, determinants, activities, intensity, impacts and attitudes. Five types of tourists were pinpointed and theoretical and practical contributions of the study were discussed

INHERITED IL-12R beta 2 DEFICIENCY CAUSES MYCOBACTERIAL SUSCEPTIBILITY

Immunogenetics and cellular immunology of bacterial infectious disease

INHERITED IL-12R beta 2 DEFICIENCY CAUSES MYCOBACTERIAL SUSCEPTIBILITY

Immunogenetics and cellular immunology of bacterial infectious disease