Dichroism measurements in forensic fibre examination: Part 3 — Dyed cotton and viscose fibres

A number of dyed cellulosic fibres were examined with plane polarized light on their dichroic behavior by microscopy and microspectrophotometry (MSP-PPL). Significant dichroic effects (mostly hypochromic effects and hypsochromic bands shifts) were reported. The effect is related to the chemical structure: some dye structures always possess dichroism (azo, stilbene, thiazole and oxazine), some dyes demonstrate sometimes dichroic effects (anthraquinoid, indigoid) while other structures never demonstrate dichroic effects (sulphur, diphenylmethanes, triarylmethanes, phthalocyanines). In some cases a different dichroic behavior was found for the same dyes applied on cotton and on viscose.     

How does organizational task matter for the reputation of public agencies?

The study of organizational task for understanding how organizations behave and evolve has been one of the classic topics in organization theory and public administration. Reputation scholarship has appeared as a promising perspective to understand internal and external organizational dynamics. Reputation scholars, too, emphasize the critical importance of task. Despite this recognition, the literature is characterized by a lack of theorization, and large-scale comparative analyses on how task characteristics are related to reputational dynamics. This study aims to address these concerns, relying on an extensive longitudinal dataset on the media reputation of 40 agencies in two countries to explain organizations' likelihood of attracting reputational threats (both in general and targeting specific reputational dimensions) through different task characteristics. Our main finding is that as agencies perform tasks of a more coercive and authoritative nature (regulatory tasks and, to a lesser extent, redistributive tasks), they are more likely to attract reputational threats (both in general and to all dimensions).     

Did Covid-19 Change Armed Group Governance? Evidence from a Survey of Local Security Authorities in Colombia

As the Covid-19 pandemic began, initial reports suggested that armed groups would seize the opportunity to expand their control over territory and civilians. However, drawing on an original survey of local security officials responsible for monitoring armed group behaviour in Colombia, we find little evidence of significant shifts in the presence or behaviour of political or criminal groups. Contrary to prevailing expectations, we also find that armed group governance is common in areas contested by multiple groups. Our findings shed new light on armed group adaptation to shocks, and challenge the assumption that territorial control is a prerequisite for governance.