XXHA-3505曝光曲线的制作

本文介绍了使用阶梯试块制作周向X射线机曝光曲线的原理及操作步骤,并借助EXCEL作为分析工具绘制曝光曲线。     

利用D-T曝光曲线对底片缺陷进行判断

在实际进行射线照相时曝光曲线的应用是利用曝光曲线选择射线能量、焦距、曝光量等。底片上不同部位的黑度差则是由于射线透照方向上的厚度差引起的,通过曝光曲线以及黑度差确定射线透照方向上的厚度差,对引起厚度差的原因进行定性定量分析,对底片缺陷进行判断评级。     

(Non)Urban Humans: Questions for a Research Agenda (the Work the Urban Could Do)

This interventions essay deploys the notion of the (non)urban human to address the conundrums associated with identifying spaces, operations and entities outside of urbanization's planetary encompassment. In the piece, the objective of which is to call for a programme of prospective research collaborations, it seeks to explore domains of intersection among that which appears ‘left out’ of urbanization's purported advantages, that whose time has yet to come, and forms of the human that exceed the possibilities of self-reflexive consciousness and free will. The essay draws upon the temporalities, rhythms, spatial arrangements and sensoria generated through histories of blackness and ‘natural worlds’ and their interactions, to posit extensionality—a dispersal of bodies and their capacities into more reciprocal and mutual enactments with the earthly surrounds—as a generative by-product of extended urbanization.