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Analytic framework for understanding the competing multiple light scattering processes.

ABSTRACT: In many complex physical phenomena such as wave propagation in scattering media, the process of interest often cannot be easily distinguished from other processes because only the total combined process is accessible. This makes it difficult to extract the precise knowledge of each subprocess. Here, we derive an analytic expression describing the way the eigenchannel coupling of the total process distributes its energy to the individual subprocesses, with only partial information on each subprocess such as the average eigenvalue ??? and enhancement factor ?. We found that the ratio of (??-?1)??? between two subprocesses is a critical parameter determining the preferable subprocess in the energy coupling. This work provides a new analytic framework for understanding the effect of wavefront shaping in the control of wave propagation in disordered media.

SUBMITTER: Lee YR

PROVIDER: S-EPMC6391453 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature

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Analytic framework for understanding the competing multiple light scattering processes.

Lee Ye-Ryoung YR Choi Wonjun W Jeong Seungwon S Choi Wonshik W

Scientific reports 20190226 1

In many complex physical phenomena such as wave propagation in scattering media, the process of interest often cannot be easily distinguished from other processes because only the total combined process is accessible. This makes it difficult to extract the precise knowledge of each subprocess. Here, we derive an analytic expression describing the way the eigenchannel coupling of the total process distributes its energy to the individual subprocesses, with only partial information on each subproc ...[more]

PMID: 30808939

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Project description:BackgroundPatients' beliefs about treatment influence treatment engagement and adherence. The Necessity-Concerns Framework postulates that adherence is influenced by implicit judgements of personal need for the treatment (necessity beliefs) and concerns about the potential adverse consequences of taking it.ObjectiveTo assess the utility of the NCF in explaining nonadherence to prescribed medicines.Data sourcesWe searched EMBASE, Medline, PsycInfo, CDSR/DARE/CCT and CINAHL from January 1999 to April 2013 and handsearched reference sections from relevant articles.Study eligibility criteriaStudies using the Beliefs about Medicines Questionnaire (BMQ) to examine perceptions of personal necessity for medication and concerns about potential adverse effects, in relation to a measure of adherence to medication.ParticipantsPatients with long-term conditions.Study appraisal and synthesis methodsSystematic review and meta-analysis of methodological quality was assessed by two independent reviewers. We pooled odds ratios for adherence using random effects models.ResultsWe identified 3777 studies, of which 94 (N = 25,072) fulfilled the inclusion criteria. Across studies, higher adherence was associated with stronger perceptions of necessity of treatment, OR = 1.742, 95% CI [1.569, 1.934], p<0.0001, and fewer Concerns about treatment, OR = 0.504, 95% CI: [0.450, 0.564], p<0.0001. These relationships remained significant when data were stratified by study size, the country in which the research was conducted and the type of adherence measure used.LimitationsFew prospective longitudinal studies using objective adherence measures were identified.ConclusionsThe Necessity-Concerns Framework is a useful conceptual model for understanding patients' perspectives on prescribed medicines. Taking account of patients' necessity beliefs and concerns could enhance the quality of prescribing by helping clinicians to engage patients in treatment decisions and support optimal adherence to appropriate prescriptions.

Dataset Information

Analytic framework for understanding the competing multiple light scattering processes.

Publications

Analytic framework for understanding the competing multiple light scattering processes.

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