A general formula is derived for the spectral density distribution in the far zone, produced by the diffraction of a beam of any state of spatial coherence on a medium with a spatially periodic structure. The formula may be used to determine the structure of crystals from the diffraction of partially coherent x-ray beams.

Download full-text PDF

Source
http://dx.doi.org/10.1364/OL.38.004023DOI Listing

Publication Analysis

Top Keywords

state spatial
8
spatial coherence
8
periodic structure
8
diffraction radiation
4
radiation state
4
coherence media
4
media periodic
4
structure general
4
general formula
4
formula derived
4

Similar Publications

Drug Development.

Alzheimers Dement

December 2024

NYU Grossman School of Medicine, New York, NY, USA; NYU, New York City, NY, USA.

Background: Astrocytes, a major glial cell in the central nervous system (CNS), can become reactive in response to inflammation or injury, and release toxic factors that kill specific subtypes of neurons. Over the past several decades, many groups report that reactive astrocytes are present in the brains of patients with Alzheimer's disease, as well as several other neurodegenerative diseases. In addition, reactive astrocyte sub-types most associated with these diseases are now reported to be present during CNS cancers of several types.

View Article and Find Full Text PDF

Background: Loneliness is linked with risk for cognitive decline and dementia among older adults, but the degree to which it predicts future risk is unclear. To investigate if loneliness acts as a predictor of cognitive decline, this study employed a measurement burst design using data from the Einstein Aging Study, where loneliness and cognition were repeatedly assessed daily, for several days, across several years. In this type of data, a major challenge to detecting subtle cognitive changes is the presence of retest/practice effects.

View Article and Find Full Text PDF

Background: Integrating humanoid robots, wearable sensors, and spatial technology into an intelligent dementia-friendly living space is crucial for tailoring personalized and supportive environments, thereby addressing the unique needs of individuals affected by dementia and maintaining quality of life.[1-10].

Methods: We programmed Pepper, a humanoid robot, for independent verbal communication to interact, tell jokes, and offer medications.

View Article and Find Full Text PDF

Background: Integrating humanoid robots, wearable sensors, and spatial technology into an intelligent dementia-friendly living space is crucial for tailoring personalized and supportive environments, thereby addressing the unique needs of individuals affected by dementia and maintaining quality of life.[1-10].

Methods: We programmed Pepper, a humanoid robot, for independent verbal communication to interact, tell jokes, and offer medications.

View Article and Find Full Text PDF

Background: An 84-year-old male, with 16 years of education (retired physics teacher) was admitted to a long-term rehabilitation centre to receive daily care, with cognitive decline symptoms. This study presents the data from a three-month cognitive enhancement program.

Methods: In September 2023, the patient underwent the Mini Mental State Examination (MMSE) in Greek, followed by cognitive enhancement sessions (45 minutes, twice a week) for three months.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!