1,606 research outputs found
Electronic books: Are they effective educational tools for students who are deaf or hard of hearing?
This literature review will examine the effectiveness of electronic book features on students’ reading development in the general education population and investigate whether or not these digital tools could be a useful tool and/or supplement in literacy for students who are deaf and hard of hearing
Rapid manufacturing- state of the art, analysis and future perspectives
Layer based manufacturing system often referred to as Rapid Prototyping (RP) have been in existence for 22 years, in the past 5 years Rapid Manufacturing (RM) has emerged from these RP systems to produce functional and structural customer focused end use components and products.
This keynote paper will review the current range of technologies for metallic systems, it will also evaluate the operating principles, features, potential and limitations of current commercially available systems.
Rapid Manufacture is increasingly being used for high value difficult to manufacture components with a new set of design rules required to fully exploit the RM systems inherent characteristics. A case studies approach will be used to show the benefits and pitfalls this new design freedom can provide designers
Effect of Light Level on Feeding Behavior in a Lemur Species (Eulemur Rubriventer) With a Color Vision Polymorphism.
Understanding the visual capabilities and correlated behavior of prosimians provides vital information regarding the evolution of color vision. Feeding behavior in particular is often modified based on color vision status in various primate taxa. The present study examined feeding behavior under various light conditions in Eulemur rubriventer, a lemur species with a color vision polymorphism in which only females can have trichromatic vision. Behavioral observations were conducted for a single E. rubrventer group over a 13 day study period in April 2012. Results found no significant difference in rates of frugivory or exploitation of green vs. non-green food between male and female E. rubriventer. However, female E. rubriventer were found to exploit non-green food at a higher average light level than males. Overall, results are suggestive of some behavioral modifications for dichromats based on light level
Mammalian afferent nerve fibres
The original research work described in this thesis falls into three
categories:- a) a study of mammalian myelinated and non-myelinated afferent
nerve fibres and their endings, this forms the principal part, b) an examination
of some properties of nerve-cells in the mammalian spinal cord and c) a minor
section on the sympathetic nervous system.a) Afferent nerve fibres. The major advance described is the development
of techniques which allow individual active afferent nerve fibres to be identified,
and their conduction velocities to be measured, when they are in nerve strands
containing many axons. By these means the diameters of the active fibres may be
assessed. These techniques, combined with improved dissection methods, have
made the non-myelinated axons in peripheral nerves accessible as functional single
units. The results of applying the techniques first to visceral nerves, then to
cutaneous nerves and finally to somatic muscle nerves, establish that the nerves
to the abdominal viscera and to the skin contain an unexpected variety of non¬
myelinated afferent axons, as judged by the responses of the nerve-endings to
quantitative mechanical, thermal and chemical stimuli. In the stomach there
were both mechanically-sensitive and pH-sensitive units located in different
layers of the stomach wall. In the skin there were mechanoreceptors and
thermoreceptors of highly selective sensitivity. Some of these latter nerveendings and their afferent fibres could function as 'modality-specific' cutaneous
transducers, with very considerable and unexplored implications in terms of
central nervous function. The muscle afferent C fibres appear to be nociceptors.
A detailed examination of single myelinated cutaneous afferent nerve-fibres also
supports the thesis that the afferent fibres and their receptors have a selective
sensitivity. A relation between the structure of afferent nerve-endings and the
selective sensitivity of the afferent unit was clearly established for one particular
nerve-ending - a 'cutaneous touch corpuscle' innervated by a thick myelinated axon.
The dependence of the structure and sensitivity of the 'touch corpuscle' on its
innervation was also established.b) Spinal cord neurones. The pattern of 'recurrent inhibitory' connections
from motor axon collaterals to small interneurones (Renshaw cells) in the ventral
horn of the lumbo-sacral spinal cord and from these interneurones to motorneurones displayed no reflex pattern. In general, there was feedback from motoraxons to adjacent Renshaw cells, which in turn fed back to the motoneuronal nucleus
from which the motor-axons arose and also to other adjacent motor-neurones.
There was a striking correlation between the intensity of recurrent inhibition and
the function of the motor-neurone; those motor-neurones innervating slowly -
contracting extensor muscles were most strongly inhibited.c) Sympathetic nervous system. Depletion of the stores of catecholamines
and 5 -hydroxytryptamine in the brain of cats by reserpine treatment did not abolish
sympathetic preganglionic efferent activity, so that the dramatic depressant action
of reserpine on an animal is unlikely to be due to this depletion. The depressant
effect of intravenously injected catecholamines on sympathetic preganglionic
disch arge was shown to be exerted principally, if not entirely, by reflex mechanism
not by a direct action on the central nervous system
All-Consuming Madness
My honors project is a short story, titled All-Consuming Madness, that follows the main character Annie as she struggles to cope with the aftermath of a car accident that changed her life. The story explores the impact grief can have on family relationships and how trauma can close people off from each other. It also explores Annie’s journey towards healing as she struggles to forgive herself for the accident. The accompanying essays detail the creative process I went through while creating this story and the influences that had an important impact on the story
From Despair Comes Future Hope
Dimensions: 30 inches wide, 36 inches tallMedium: Inkjet on matte paper, printed on both sidesWork displayed here as a diptych
Artist\u27s narrative: Letter 3 was written to Dunbar’s friend and mentor Dr. James Newton Matthews. The letter focused on Dunbar’s despair following his publication and recital at the Western Association of Writers Conference, where he was not able to sell any of his poems. This caused him to doubt himself and his ability. The color blue was used to represent these feelings of sadness and self doubt. Negative words were pulled from the letter and applied at various line weights and opacities to further emphasize how Dunbar’s negative thoughts were overpowering him. The imagery of torn paper also represents his feelings of failure as the pieces are falling away and hitting the bottom of the poster. The letter transitions to a more hopeful note as Dunbar recounts his admiration for Will Pfrimmer’s Driftwood and the prospect of the developing world of Western poetry. The opposing side of the poster features the color orange with text that reinforces the feeling of hope that becomes evident later in the letter. The repeated hearts represent Dunbar’s Admiration for Pfrimmer and John Clark Ridpath, whom he met at Western Association of Writers Conference, and more positive and optimistic words and phrases were chosen to populate the page and reflect the more positive tone of the latter half of the letter. The type palette consists of Vendetta by John Downer and Tisa Sans Pro by Miklavcic.https://ecommons.udayton.edu/stu_vad_dunbarletters/1003/thumbnail.jp
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