Visualization in cryogenic environment: Application to two-phase studies

11 pagesInternational audienceThis paper reviews recent technical developments devoted to the study of cryogenic two-phase fluids. These techniques span from simple flow visualization to quantitative measurements of light scattering. It is shown that simple flow pattern configurations are obtained using classical optical tools (CCD cam- eras, endoscopes), even in most severe environments (high vacuum, high magnetic field). Quantitative measurements include laser velocimetry, particle sizing, and light scattering analysis. In the case of mag- netically compensated gravity boiling oxygen, optical access is used to control the poistioning of a bubble subject to buoyancy forces in an experimental cell. Flow visualization on a two-phase superfluid helium pipe-flow, performed as a support of LHC cooldown studies, leads to flow pattern characterization. Visu- alization includes stratified and atomized flows. Thanks to the low refractive index contrast between the liquid and its vapor, quantitative results on droplet densities can be obtained even in a multiple scatter- ing regime

Characteristics and outcomes associated with CD2 and CD25 expression on bone marrow mast cells in patients with systemic mastocytosis

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Integrity in Mobile Phone Financial Services : Measures for Mitigating Risks from Money Laundering and Terrorist Financing

This working paper explores strategies to identify and manage potential money laundering (ML) and terrorist financing (TF) risks in mobile financial services (m-FS). Using fieldwork in seven economies as a basis, the paper provides guidance on the best means of assessing perceived versus actual ML and TF risks, and then identifies specific measures to mitigate the actual risks. The paper concludes with recommendations that aim to promote a regulatory balance to foster an enabling environment for business while minimizing ML and TF risks that hinder its sustainability. The paper identifies four risk factors in m-FS and appropriate mitigation responses. The risk factors are anonymity, elusiveness, rapidity, and poor oversight. Anonymity is the risk of not knowing a customer's actual identity, and it can be diminished through enhanced know-your-customer procedures and identification tools. Elusiveness is the ability to disguise mobile transaction totals, origins, and destinations. It can be diminished through transaction limits and enhanced customer profiling, monitoring, and reporting. Rapidity is the speed with which illicit transactions can occur. Its risk is checked by flagging certain types of transactions and managing risks of third-party providers. The fourth type of risk is poor oversight, which can be mitigated by transparent guidelines on mobile services, clearer licensing, regulation of providers, and effective risk supervision within bank and non-bank m-FS providers

A Practical Guide for Bank Supervisors

The COVID-19 (coronavirus) crisis was a reminder, if any were needed, that criminal creativity thrives in times of chaos, exploiting people’s fears. Unsafe face masks, counterfeit drugs, and suspect medical equipment flooded the market, touted as miracle cures against the coronavirus by unscrupulous actors wanting to turn a quick profit. Companies with no record in health won big government contracts and, as people’s situation deteriorated, organized crime stepped in to lend a “helping hand” to those suffering financial distress. Where most people saw a global public health and economic crisis, criminals saw an opportunity. What this criminal behavior, indeed almost all financial economic crime, has in common is that the funds involved move through the formal financial system. The service providers that execute those transactions are in a good position to gather firsthand intelligence on what is happening. For this reason, banks and other financial institutions have anti-money-laundering and countering the financing of terrorism (AML/CFT) obligations to find out who is paying whom and why and, if necessary, to alert the authorities. Financial institutions are the first line of defense against this criminal behavior; they are the gatekeepers to the international financial system