Evidence of Phase Transitions in Canine Skill Development

Electron Microscopy of Graphite Intercalation Compounds

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100055564 ◽

1982 ◽

Vol 40 ◽

pp. 544-545

Author(s):

G. Timp ◽

L. Salamanca-Riba ◽

L.W. Hobbs ◽

G. Dresselhaus ◽

M.S. Dresselhaus

Keyword(s):

Electron Microscopy ◽

Phase Transitions ◽

Domain Wall ◽

Intercalation Compounds ◽

Lattice Plane ◽

Wall Model ◽

Graphite Intercalation Compounds ◽

Fundamental Symmetry ◽

Graphite Intercalation

Electron microscopy can be used to study structures and phase transitions occurring in graphite intercalations compounds. The fundamental symmetry in graphite intercalation compounds is the staging periodicity whereby each intercalate layer is separated by n graphite layers, n denoting the stage index. The currently accepted model for intercalation proposed by Herold and Daumas assumes that the sample contains equal amounts of intercalant between any two graphite layers and staged regions are confined to domains. Specifically, in a stage 2 compound, the Herold-Daumas domain wall model predicts a pleated lattice plane structure.

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Multiple phase transitions investigated by high-speed TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100175880 ◽

1990 ◽

Vol 48 (4) ◽

pp. 550-551

Author(s):

Oleg Bostanjoglo ◽

Peter Thomsen-Schmidt

Keyword(s):

Phase Transitions ◽

High Speed ◽

Short Exposure ◽

Semiconductor Film ◽

Time Resolved ◽

Short Exposure Time ◽

Multiple Phase ◽

Model Substance ◽

History Of ◽

Electron Image

Thin GexTe1-x (x = 0.15-0.8) were studied as a model substance of a composite semiconductor film, in addition being of interest for optical storage material. Two complementary modes of time-resolved TEM were used to trace the phase transitions, induced by an attached Q-switched (50 ns FWHM) and frequency doubled (532 nm) Nd:YAG laser. The laser radiation was focused onto the specimen within the TEM to a 20 μm spot (FWHM). Discrete intermediate states were visualized by short-exposure time doubleframe imaging /1,2/. The full history of a transformation was gained by tracking the electron image intensity with photomultiplier and storage oscilloscopes (space/time resolution 100 nm/3 ns) /3/. In order to avoid radiation damage by the probing electron beam to detector and specimen, the beam is pulsed in this continuous mode of time-resolved TEM,too.Short events ( <2 μs) are followed by illuminating with an extended single electron pulse (fig. 1c)

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What Clinicians Need to Know About Early Literacy Development in Children With Hearing Loss

Language Speech and Hearing Services in Schools ◽

10.1044/2018_lshss-18-0015 ◽

2019 ◽

Vol 50 (1) ◽

pp. 16-33 ◽

Cited By ~ 6

Author(s):

Elizabeth Runnion ◽

Shelley Gray

Keyword(s):

Hearing Loss ◽

Early Literacy ◽

Skill Development ◽

Reading Proficiency ◽

Literacy Skills ◽

Literacy Skill ◽

Early Literacy Development ◽

Literacy Skill Development ◽

Children With Hearing Loss

PurposeChildren with hearing loss may not reach the same level of reading proficiency as their peers with typical development. Audiologists and speech-language pathologists (SLPs) have important roles to play in preventing this problem early in children's development. In this tutorial, we aim to communicate how the habilitation practices of audiologists and intervention services of SLPs can support early literacy skill development in children with hearing loss.MethodWe describe key findings from peer-reviewed research articles to provide a review of early literacy skill development, to explain the relationship between early literacy skills and conventional reading skills, and to highlight findings from early literacy skill intervention studies that included children with hearing loss who use spoken language. We conclude with a hypothetical case study to illustrate how audiologists and SLPs can support early literacy acquisition in children with hearing loss.ConclusionFindings from studies of young children with hearing loss suggest that a promising approach to improving reading outcomes is to provide explicit early literacy instruction and intervention.

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