Room temperature ferromagnetism and photoluminescence of nanocrystalline Zn1 − xCoxO thin films prepared by sol–gel MOD

Zn_1???xCo_xO (ZC) [x?=?0, 1, 3, 5, 7 and 9?mol%] thin films were prepared by sol–gel combined metallo-organic decomposition method. The films were deposited on the Si substrate with spin-coating technique and annealed at 600?°C for 3?h. X-ray diffraction pattern shows the formation hexagonal wurtzite phase and distortion (c/a) decreases with increasing Co concentration in ZnO. The average grain size is measured using Scherer relation. Atomic force microscopy is used to confirm the formation of nanograins resulted by the use of polyethylene glycol as surfactant. The photoluminescence was recorded by using He-Cd laser of excitation wavelength 325?nm in wavelength region of 350–650?nm which exhibits some influence of Co doping on the multiplication of defects such as O vacancies, Zn interstitials and grain boundary defects. All thin films show room temperature ferromagnetism except pure ZnO which is diamagnetic and 9?mol% of Co shows paramagnetism. This behaviour is interpreted as due to fluctuations in the magnetic ordering, depending on grain size and site location in grain boundaries or oxygen vacancies.     

What aamft approved supervisors get paid

A national survey of American Association of Marriage and Family Therapy Approved Supervisors found statistically significant bivariate relationships between their annual income in 1999 and their gender, professional identity, supervision setting, and geographic locale. Race, community size, and years of clinical experience were not significantly related to income statistically. Moreover, only gender was statistically significant upon a sequential logistic regression of these variables relative to an income of greater or less than $50,000 a year.     

Effects of computer‐aided instruction on the implementation of the MSWO stimulus preference assessment

This study evaluated a self‐instructional online training package to teach students and staff to conduct a stimulus preference assessment using the multiple‐stimulus without replacement procedure. The training package included a self‐instructional manual and video modeling and was delivered online. Training was evaluated using a multiple‐probe design across a total of six university students and four staff members. Overall, students improved from a mean of 35% correct in baseline to a mean of 94% correct following training, and staff improved from a mean of 23% correct in baseline to a mean of 87% correct following training. During retention and generalization simulated assessments conducted from 7 to 17 days following training, all participants performed considerably above baseline. The online delivery of the self‐instructional manual plus video modeling has tremendous potential for providing an effective method for teaching individuals to conduct stimulus preference assessments without face‐to‐face instruction.     

Neurobehavioral Characteristics of Children with Duchenne Muscular Dystrophy

This study investigated cognitive, metacognitive, and psychosocial aspects of neurobehavioral functioning in 22 boys with Duchenne muscular dystrophy (DMD) and 18 unaffected siblings, all between the ages of 6 and 16 years. Probands and siblings completed the Wechsler Abbreviated Scale of Intelligence, as well as selected subtests from the Children's Memory Scale and from the Delis-Kaplan Executive Function System, while parents completed the Child Behavior Checklist and the Behavior Rating Inventory of Executive Function. Compared to siblings, probands demonstrated relative weaknesses on both verbal and nonverbal measures of delayed recall and response generation and were rated by parents as having more difficulties with social interaction, initiation, and adaptation. It is concluded that DMD is associated with mild but potentially significant difficulties in a range of neurobehavioral areas, likely related to deficient dystrophin levels in an integrated brain circuit that includes the cerebellum, hippocampus, and association neocortex.     

Uterine Transplant: A Risk to Life or a Chance for Life?

Science and Engineering Ethics - Being inherently different from any other lifesaving organ transplant, uterine transplantation does not aim at saving lives but supporting the possibility to...