Enhanced Visualization of Latent Fingermarks on Rough Aluminum Surfaces Using Sequential Au and Zn/ZnS/ZnO Depositions

Detection and visualization of fingermarks on rough and diffuse surfaces is a relatively challenging task. We succeeded in developing latent fingermarks on scratched and rough aluminum surfaces by sequential deposition of a thin layer of gold followed by one of zinc or zinc‐based compounds on the fingermarks. The best image enhancement was achieved with sequential Au and ZnS depositions. Using this combination, we could enhance the visualization of latent fingermarks aged over 65 days in normal conditions. The optical reflectance from the fingermarks with the deposited layers of metal/dielectric is analyzed as a stratified medium. Significant contrast in the reflectance from the regions of the ridges and the valleys of the fingermark would enhance the visualization. Our results show that the Au and ZnS bi‐layer combination can have a large reflection contrast and improved fingermark visualization at wavelengths corresponding to the green light for specific thickness of ZnS.     

Reconceptualizing financial innovation: frame,conjuncture and bricolage

Abstract

This article argues for a reconceptualization of financial innovation which, as culprit and victim of the current crisis, is now damned by those who once praised it. But what is financial innovation? The dominant answers from mainstream finance and social studies of finance share variations on a rationalistic view whereby financial innovation is about improving markets or at least extending the sphere of rational calculability. Because improvisation is more important than the dominant perspectives can admit, this article proposes a new concept of financial innovation whose three main elements – frame, conjuncture and bricolage – are indicated by the title of this article. The importance of this problem shift is that it highlights the inherent fragility of this type of intermediary-led financial innovation where things will often miscarry and highlights the need for a more radical rethinking about policy responses to the financial crisis that began in 2007.     

Labour protest and industrial peace: Russian steelworkers’ encounters with economic reforms and unravelling social protections

Abstract

This paper is about knowledge limits and the financial crisis. It begins by examining various existing accounts of crisis which disagree about the causes, but share the belief that the crisis represents a problem of socio-technical malfunction which requires some kind of technocratic fix: the three variants on this explanation are the crisis as accident, conspiracy or calculative failure. This paper proposes an alternative explanation which frames the crisis differently as an elite political debacle. Political and technocratic elites were hubristically detached from the process of financial innovation as it took the form of ‘bricolage’, which put finance beyond technical control or management. The paper raises fundamental questions about the politicized role of technocrats after the 1980s and emphasizes the need to bring private finance and its public regulators under democratic political control whose technical precondition is a dramatic simplification of finance.