spatial focusing
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Although deixis has received increasingly academic attention in linguistic research, its use in sermons, particularly in the Islamic context, has been largely underexplored. Therefore, this paper examined deixis in Islamic Friday sermons from the perspective of pragmatics and discourse analysis. Drawing on Levinson’s Framework, it aimed at analyzing three main types of deixis (personal, temporal, and spatial), focusing on their forms, features, functions, and frequency. The data were a corpus of 70 sermons compiled by the researcher from various online websites. The study employed qualitative and quantitative methods to meet the purpose of the study. The findings revealed that these three deictic types were relatively common in the language of the respective corpus with the personal type being predominant, deictically pointing to different referents whose interpretation was sensitive to the context in which they occurred. As an affectively powerful tool in the corpus, the preachers utilized deixis to serve a wide variety of functions on the discourse and pragmatic levels. In the corpus, deictic expressions worked as a discourse strategy to persuade the listeners by drawing their attention and engaging them in the message of the sermon and to signal and organize the flow of information in the ongoing discourse. They also served to enhance togetherness, intimacy, and politeness between the preachers and their audience. This study is hoped to present a good basis for further linguistic investigation of deixis in other languages and religions to illuminate how deictics work in sermonic discourse. 

Using the central particle method, the equations of the trajectory of charged particles in an axisymmetric electrostatic mirror are obtained with an accuracy of the third order of smallness inclusive with account for relativistic effects. The conditions for spatial focusing and the coefficients of spatial aberrations in the Gaussian plane of the mirror image are determined with account for relativism. By means of numerical calculations, conditions for simultaneous elimination of spherical and axial chromatic aberrations are determined, taking into account relativistic effects, in an axisymmetric electrostatic mirror when the object plane of the mirror is aligned with its focal plane. It is shown that account for high particle velocities leads both to a shift in the position of the Gaussian image plane and a change in the focusing quality.

Beginning with the colonization event in 1788 and then moving through the arrival of free settlers in the nineteenth century, this chapter considers how the British and then colonial governments sutured themselves into the space that became Australia. It explores key cultural and political events that created a sense of belonging for non-Indigenous peoples at this time. The chapter then explains how policies and practices that marked out the limits of migrant belonging have worked, focusing on the migration of groups who were understood as marginal to the nation. Again, emphasis is placed on the range of ideas, events, demands, and desires about migration that complicated policies and practices that clearly sought to produce a white Australia. Lastly, the analysis in this chapter locates migration in relation to the spatial, focusing on how migration and settlement practices were shaped in terms of political and everyday understandings of Australia in relation to: first, other countries in the region, especially Asia; second, the ‘mother country’, the United Kingdom; and finally, the Indigenous peoples within the country.

Abstract Increased resolution of data constraining topography and crustal structures provides new quantitative ways to assess province-scale surface-subsurface connections beneath volcanoes. We used a database of mapped vents to extract edifices with known epoch ages from digital elevation models (DEMs) in the Cascades arc (western North America), deriving volumes that likely represent ∼50% of total Quaternary eruptive output. Edifice volumes and spatial vent density correlate with diverse geophysical data that fingerprint magmatic influence in the upper crust. Variations in subsurface structures consistent with volcanism are common beneath Quaternary vents throughout the arc, but they are more strongly associated with younger vents. Geophysical magmatic signatures increase in the central and southern Cascade Range (Cascades), where eruptive output is largest and vents are closely spaced. Vents and correlated crustal structures, as well as temporal transitions in the degree of spatially localized versus distributed eruptions, define centers with lateral extents of ∼100 km throughout the arc, suggesting a time-evolving spatial focusing of magma ascent.

Magnetic particle hyperthermia is a promising cancer therapy, but a typical constraint of its applicability is localizing heat solely to malignant regions sparing healthy surrounding tissues.

Abstract Control of the spatial and temporal properties of light propagating in disordered media have been demonstrated over the last decade using spatial light modulators. Most of the previous studies demonstrated spatial focusing to the speckle grain size, and manipulation of the temporal properties of the achieved focus. In this work, we demonstrate an approach to control the total temporal impulse response, not only at a single speckle grain but over all spatial degrees of freedom (spatial and polarization modes) at any arbitrary delay time through a multimode fiber. Global enhancement or suppression of the total light intensity exiting a multimode fibre is shown for arbitrary delays and polarization states. This work could benefit to applications that require pulse delivery in disordered media.

This paper proposes a class of frequency diverse array (FDA) for achieving time-varying spatial focusing for multiple targets. On the basis of single-target focusing of FDA, sequential focus at the four points is achieved by controlling the time period. The effects of frequency offset on the range of focusing area are derived. Since FDA is narrowband in nature, the relative operating bandwidth is limited to be 10%. Under the limitation of the bandwidth, the sequential multi-target focusing in the far-field is achieved. To validate the proposed method, numerical examples of eight-element FDA are reported and discussed.