An examination of spelling development in one third grade class

Spelling research was conducted on one classroom of third grade students to determine if developmentally appropriate word study activities would help them to improve their spelling skills

A Budapesti Korai Fejlesztő Központ evésterápiájának bemutatása és hatásai etetési/evési probléma miatt tanácsadásra jelentkezett gyermekek esetében

A szakdolgozatom célja a Budapesti Korai Fejlesztő Központban folyó evésterápiás csoport bemutatása, ismertetése

Microstructural Characterization and Oxidation Behavior of Al-Cu-Ni-Mn and Al-Cu-Ni-Mn-Si Non-Body Centered Cubic High Entropy Alloys

High entropy alloys (HEA) differ from traditional alloying systems because five elements are mixed in equi-atomic proportions, as opposed to having one main principal element. As a result of exploring this new method of alloying, it was found that high entropy alloys demonstrate exceptional mechanical properties, an example being oxidation resistance, and are capable of enduring elevated temperatures. Seeing the potential that this new area of interest contains, studies involving a combination of elements to form various HEA have been performed. Most refractory metals are body-centered cubic and possess extremely high melting temperatures, so they are regularly considered when designing high entropy alloys. However, the main goal of this investigation is to characterize and study the oxidation behavior of a high entropy alloying system that is comprised of only non-body centered cubic elements. The two alloys of interest are Al-Cu-Ni-Mn (Non Si Alloy) and Al-Cu-Ni-Mn-Si (Si Alloy). Each element that was selected for the HEA did not occupy a body centered cubic crystal structure and did possess a relatively high melting temperature. During this investigation the main objective was to microstructurally characterize each alloy in the as received condition and subject each alloy to different oxidation experiments. Exposing each HEA toelevated temperatures, 600oC and 1000oC, led to the study of their static and cyclic oxidation behavior. For static oxidation experiments, each alloy was held for a time duration of 24 hours, 48 hours, and 72 hours at 600oC and 1000oC. For cyclic oxidation experiments, each alloy was exposed to heating for a 24 hour time period and then remained cooled for 24 hours, and this process was repeated until the heating time equaled 1 full week. After experimentation the next objective was to identify microstructural features, characterize the oxide layer, and analyze the interface between the bulk microstructure and the oxidation layer. This characterization was done by using transmission electron microscopy (TEM), x-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) to identify microstructural characteristics in the as received and oxidized condition

Microstructural Characterization and Oxidation Behavior of Al-Cu-Ni-Mn and Al-Cu-Ni-Mn-Si Non-Body Centered Cubic High Entropy Alloys

High entropy alloys (HEA) differ from traditional alloying systems because five elements are mixed in equi-atomic proportions, as opposed to having one main principal element. As a result of exploring this new method of alloying, it was found that high entropy alloys demonstrate exceptional mechanical properties, an example being oxidation resistance, and are capable of enduring elevated temperatures. Seeing the potential that this new area of interest contains, studies involving a combination of elements to form various HEA have been performed. Most refractory metals are body-centered cubic and possess extremely high melting temperatures, so they are regularly considered when designing high entropy alloys. However, the main goal of this investigation is to characterize and study the oxidation behavior of a high entropy alloying system that is comprised of only non-body centered cubic elements. The two alloys of interest are Al-Cu-Ni-Mn (Non Si Alloy) and Al-Cu-Ni-Mn-Si (Si Alloy). Each element that was selected for the HEA did not occupy a body centered cubic crystal structure and did possess a relatively high melting temperature. During this investigation the main objective was to microstructurally characterize each alloy in the as received condition and subject each alloy to different oxidation experiments. Exposing each HEA to elevated temperatures, 600oC and 1000oC, led to the study of their static and cyclic oxidation behavior. For static oxidation experiments, each alloy was held for a time duration of 24 hours, 48 hours, and 72 hours at 600oC and 1000oC. For cyclic oxidation experiments, each alloy was exposed to heating for a 24 hour time period and then remained cooled for 24 hours, and this process was repeated until the heating time equaled 1 full week. After experimentation the next objective was to identify microstructural features, characterize the oxide layer, and analyze the interface between the bulk microstructure and the oxidation layer. This characterization was done by using transmission electron microscopy (TEM), x-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) to identify microstructural characteristics in the as received and oxidized condition

Exploration vestibulaire chez l'enfant (application dans la dilatation de l'aqueduc du vestibule)

L incidence des vertiges et troubles de l équilibre chez l enfant est sous estimée car d une part ils ne sont pas exprimés spontanément et d autre part, ils sont souvent attribués à un défaut de coordination. Actuellement, l exploration vestibulaire infantile n est pas intégrée dans la pratique courante car supposée difficile. La dilatation de l aqueduc du vestibule est une malformation de l os temporal responsable de déficit auditif. Des troubles vestibulaires sont également décrits mais leur incidence est mal connue, estimée entre 4 et 46% selon les études. Cette étude visait à évaluer l incidence de l atteinte vestibulaire dans une population d enfants déficients auditifs présentant une dilatation de l aqueduc du vestibule. Neuf patients, âgés de 3 à 16 ans ont été inclus dans cette étude. L exploration vestibulaire reposait sur l interrogatoire, l examen clinique et les épreuves vestibulaires qui comprenaient un test vibratoire osseux, un Head Impulse Test, des épreuves caloriques, une étude des potentiels évoqués otolithiques myogéniques et de la verticale visuelle subjective. Une symptomatologie vestibulaire était présente chez 2 patients. Les épreuves vestibulaires ont mis en évidence un déficit chez 5 patients. Au total, deux tiers des patients présentaient une atteinte vestibulaire, celle-ci étant essentiellement infra clinique. Cette étude soulève 2 questions : quelle est l incidence de l atteinte du labyrinthe postérieur chez l enfant présentant une surdité. Quel est l impact de cette atteinte sur le développement moteur ?The incidence of childhood vertigo and imbalance is underestimated because these symptoms are not manifested spontaneously and are often attributed to a lack of coordination. Currently, infantile vestibular exploration is not integrated in current practice, considered difficult. Large vestibular aqueduct is a temporal bone malformation that causes hearing loss. Vestibular disorders have also been described but their incidence is unknown, estimated between 4 and 46%. This study aimed at evaluating vestibular disorder incidence in a population of children with large vestibular aqueduct syndrome. Nine patients, age range from 3 to 16, were included in this study. Vestibular work up was based on physical examination and vestibular tests which included bone vibratory test, head impulse test, caloric testing, vestibular evoked myogenic potentials and subjective visual vertical. Two patients complained of vestibular symptoms. Explorations showed vestibular defect among 5 patients. On the whole, two thirds of the patients presented with vestibular disorders, mostly infra clinical. This study raises 2 issues: the incidence of vestibular disorders in children with hearing loss and theGRENOBLE1-BU Médecine pharm. (385162101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Feasibility Study For The Detection Of Damage To Composite Overwrapped Pressure Vessels With Phase Array Ultrasonic Testing

When discussing the field of Nondestructive Examination, there are various techniques and instrumentation that can be utilized for analysis of components. However, with newer technology and the development of newer forms of technique, it is critical to explore exactly how these can be applied. This work will aim to explore one newer technique, Phased Array Ultrasonic Testing, and determine the viability of its use for examining Composite Overwrapped Pressure Vessels (COPVs). Currently, the types of vessels have been used in a variety of ways such as in transportation vehicles. More notably, these vessels are used in aerospace applications hence the importance of inspecting these components before use. A development of a test plan was utilized to provide a guide to obtain results that could be comparable to those already collected by established techniques such as ultrasonic testing, shearography, acoustic emission, etc. The test plan was created to be able to be system independent and identifies key test parameters such as probes, frequency, imaging modes, and suggestions for future work