Parent-Child Interactions in the Presence of Risk for ADHD with and without Language Impairment

The purpose of this research was to analyze how parent-child interactions differ in discourse structure, communicative function and linguistic behaviors between children who are at high-risk for developing a behavioral disorder such as ADHD, and those who are at high-risk for developing a behavioral disorder with a co-occurring language impairment. Participants consisted of 20 children ages three to five years old and their parents. A five-minute parent-child interaction was video recorded and analyzed using an adapted version of the “Coding parent/child interaction as a clinical outcome: a research note” designed by Law, Barnett, and Kot (1999). Results revealed slight differences in each communication parameter amongst the two groups, however, statistical results of parametric and non-parametric tests determined that there were no statistically significant differences between the two groups, with the exception of increased verbal initiations (p=.040) in children with no language impairment when compared to those with a language impairment as was expected

A Corporation Cyber War Strategy

A corporation cyber war is a new type of attack that will be considered as a more dangerous attack faces the different corporations in each country in the world. The importance of a corporation cyber war now increases more and more, because of its large passive impact on a corporations work. So each country must start to defend against this type of this attack by preparing efficient strategies to reduce impacts of corporation cyber war attack to acceptable level. This paper will mention strategy to defend against corporation cyber war, which can be considered as a first step toward protecting corporations from corporation cyber war threat in efficient way and using understandable approach. Most research papers focus on cyber war between countries while our research contribution focuses on new side by focus on using of cyber war as a tool that can be used by one company against other companies by show how to prevent information warfare between companies from strategically view to help countries to address this issue and we take Jordan as a case study, so this research results can be increased trust on computing for society by increasing security and encourage more investment in information technology through prevent abusing of computers

Fear of Success and the Relationship Between Sex and Vocational Choice in Married Students

Home Economics - Family Relations and Child Developmen

Hydromagnetic turbulent instability in liquid sodium experiments

This dissertation describes the observation of magnetically-induced instabilities that occur from a preexisting hydrodynamically turbulent background. We claim these instabilities are the first direct observation of the magneto-rotational instability (MRI). An extensive body of theoretical and numerical research has established the MRI is important in the theory of accretion disks: magnetic fields destabilize otherwise stable astrophysical flows, causing turbulence and an increased angular momentum transport needed for accretion. Our instabilities occur in liquid sodium between differentially rotating concentric spheres (spherical Couette flow) where an external field is applied parallel to the axis of rotation. Our experiments are also the first known spherical Couette flow in an electrically conducting fluid, and only the second experiment, in any fluid, at an aspect ratio of 2, the same of the Earth's core. We describe the development of a Hall probe array that measures the field at 30 points outside the sphere and is used to perform a spherical harmonic decomposition (up to l=4) of the induced field. We present measurements taken with this array, along with measurements of torque needed to spin the inner sphere and of the flow velocity using ultrasound doppler velocimetry. Our experiment is consistent with prior theory, even though our instabilities occur in the presence of preexisting hydrodynamic turbulence (the theory starts with an initially laminar flow). This result may be particularly relevant in light of an ongoing debate on whether accretion disks are hydrodynamically unstable independent of external fields. The most important contribution of our experiments, however, may be in providing data with which to benchmark the many numerical and theoretical studies of the MRI and the codes used to simulate the Earth's core

Stability of the fragments and thermalization at peak center-of-mass energy

We simulate the central reactions of nearly symmetric, and asymmetric systems, for the energies at which the maximum production of IMFs occurs (E$_{c.m.}^{peak}$).This study is carried out by using hard EOS along with cugnon cross section and employing MSTB method for clusterization. We study the various properties of fragments. The stability of fragments is checked through persistence coefficient and gain term. The information about the thermalization and stopping in heavy-ion collisions is obtained via relative momentum, anisotropy ratio, and rapidity distribution. We find that for a complete stopping of incoming nuclei very heavy systems are required. The mass dependence of various quantities (such as average and maximum central density, collision dynamics as well as the time zone for hot and dense nuclear matter) is also presented. In all cases (i.e., average and maximum central density, collision dynamics as well as the time zone for hot and dense nuclear matter) a power law dependence is obtained.Comment: 21 Pages, 8 Figure

Experimental observation and characterization of the magnetorotational instability

Differential rotation occurs in conducting flows in accretion disks and planetary cores. In such systems, the magnetorotational instability can arise from coupling Lorentz and centrifugal forces to cause large radial angular momentum fluxes. We present the first experimental observation of the magnetorotational instability. Our system consists of liquid sodium between differentially rotating spheres, with an imposed coaxial magnetic field. We characterize the observed patterns, dynamics and torque increases, and establish that this instability can occur from a hydrodynamic turbulent background.Comment: 4 pages, 5 figures. Final version, accepted for publication in Physical Review Letter