Forprófun á íslenskri útgáfu Sjálfsmatskvarða Becks fyrir börn og unglinga

Neðst á síðunni er hægt að nálgast greinina í heild sinni með því að smella á hlekkinn View/OpenGerð var forprófun á Sjálfsmatskvörðum Becks fyrir börn á aldrinum 7-14 ára til þess að athuga próffræðilega eiginleika íslenskrar útgáfu af kvörðunum. Þátttakendur voru 293 úr 12 grunnskólum í Reykjavík. Próffræðilegir eiginleikar reyndust sambærilegir við erlendar rannsóknir. Innri áreiðanleiki var hár og fylgni atriða við heildarskor hvers kvarða viðunandi. Samleitni kvarða var athugað með þáttagreiningu og niðurstöður sýndu að þunglyndi, kvíði og hegðunarvandi voru einsleitir kvarðar en atriði sjálfsmyndar og reiði mynduðu tvo þætti. Gerð var þáttagreining á öllum 100 atriðum kvarðanna. Niðurstöður sýndu þrjá þætti sem skýrðu 38,6% dreifingar. Fyrsti þáttur samanstóð af þunglyndi, reiði og kvíða. Á annan þátt lögðust þrjú atriði reiði og 18 atriði hegðunarvanda og á þriðja þátt lögðust 18 atriði sjálfsmyndar. Há fylgni reyndist vera milli kvíða, þunglyndis og reiði en það er sambærilegt niðurstöðum erlendra rannsókna. Réttmæti kvarðanna var athugað með þremur spurningum um líðan í skóla og stríðni. Spurning um líðan í frímínútum hafði hæstu fylgni við þunglyndi sem bendir til þess að nemendur sem sýna þunglyndiseinkenni líður frekar illa í frímínútum. Spurning um líðan í kennslustundum hafði hæstu fylgni við hegðunarvanda og reiði og loks var hæst fylgni milli hegðunarvanda og stríðni. Enginn kynja- eða aldursmunur kom fram á kvörðum fyrir þunglyndi, reiði og kvíða. Hins vegar var meðaltal eldri hóps og drengja hærra á kvarða fyrir hegðunarvanda en hjá yngri hóp og stúlkum. Meðaltal á sjálfsmyndarkvarða var lægra í hópi eldri þáttakenda og meiri munur var á milli yngri og eldri stúlkna sem bendir til að sjálfsmynd verði neikvæðari á unglingsárum og sérstaklega hjá stúlkum. Próffræðilegir eiginleikar reyndust í megindráttum góðir en safna þarf meiri gögnum um áreiðanleika og réttmæti kvarðanna áður en hægt er að mæla með almennri notkun þeirra hér á landi.A pilot study of the Beck Youth Inventories (BYI) for children 7-14 years was undertaken to evaluate the psychometric properties of the Icelandic version. Participants were 293 from 12 elementary schools in Reykjavík. Psychometric properties revealed similar findings as other studies abroad have revealed. The internal consistency reliability was high and item total correlation acceptable. A principal axis factor analysis was conducted to evaluate the homogeneity of the BYI. Depression, anxiety and disruptive behavior were unidimensional but self-concept and anger revealed two factors. Additionally a principal axis factor analysis of all items of the inventories indicated three factors explaining 38,6% of variance. Items of depression, anxiety and anger loaded on the first factor. Disruptive behavior and 3 items of anger loaded on the second factor. Items of self-concept loaded on the third factor. Depression, anxiety and anger correlated highly, consistent with studies abroad and the factor analysis results. The scales´ validity was evaluated by three items assesing emotional well being in school and teasing other pupils. The highest correlation was between emotional well being in school breaks and depression, emotional well being in classrooms and disruptive behavior and anger, and between teasing other pupils and disruptive behavior. No significant age and gender differences were found on depression, anxiety and anger. Mean score for boys was higher than for girls on disruptive behavior and older students scored higher than younger students. Older students´ mean score was lower than younger students´ mean on self-concept and this difference was greater for girls than boys. Psychometric properties were good, but additonal studies need to be undertaken on the scales´ reliability and validity before we can recommend general use of the scales for clinical purposes in Iceland

A Quantum Hall Fluid of Vortices

In this note we demonstrate that vortices in a non-relativistic Chern-Simons theory form a quantum Hall fluid. We show that the vortex dynamics is controlled by the matrix mechanics previously proposed by Polychronakos as a description of the quantum Hall droplet. As the number of vortices becomes large, they fill the plane and a hydrodynamic treatment becomes possible, resulting in the non-commutative theory of Susskind. Key to the story is the recent D-brane realisation of vortices and their moduli spaces.Comment: 10 pages. v2(3): (More) References adde

BioDiVinE: A Framework for Parallel Analysis of Biological Models

In this paper a novel tool BioDiVinEfor parallel analysis of biological models is presented. The tool allows analysis of biological models specified in terms of a set of chemical reactions. Chemical reactions are transformed into a system of multi-affine differential equations. BioDiVinE employs techniques for finite discrete abstraction of the continuous state space. At that level, parallel analysis algorithms based on model checking are provided. In the paper, the key tool features are described and their application is demonstrated by means of a case study

PHASE, a Monte Carlo event generator for six-fermion physics at the LHC

PHASE is a new event generator dedicated to the study of Standard Model processes with six fermions in the final state at the LHC. The code is intended for analyses of vector boson scattering, Higgs search, three gauge boson production, and top physics. This first version of the program describes final states characterized by the presence of one neutrino, $pp\to 4q +l\nu_l$, at O($\alpha^6$). PHASE is based on a new iterative-adaptive multichannel technique, and employs exact leading order matrix elements. The code can generate unweighted events for any subset of all available final states. The produced parton-level events carry full information on their colour and flavour structure, enabling the evolution of the partons into fully hadronised final states. An interface to hadronization packages is provided via the Les Houches Protocol.Comment: 27 pages, Latex, 6 figure

The MHD flow of liquid film in the presence of dissipation and thermal radiation through an unsteady stretching sheet by HAM

This paper examines the impact of magnetohydrodynamic (MHD) over a thin film of an unsteady stretching sheet. Prandtl number model of dynamic viscosity and thermal conductivity is examined using Homotopy analysis method. By Makinguse of appropriate self-similar conversion, the system of model partial differential equations (PDEs) with strong nonlinearity is converted into a non-dimensional set of couple ODEs (Ordinary Differential Equations). Consequently, the system of these transformed equations is analytically explained by implementing Homotopy Analysis Method (HAM). The effects of embedded parameters such as magnetic parameter (M), radiation parameter Nrand Eckert number (Ec) on involved distributions are interpreted graphically to examine the heat transport features for both sorts of unsteadiness parameters S=0.8 and S=1.2. Moreover, the (Cf) skin friction along with the (Nu) heat transport rate (Nusselt number) is formulated for different values of relevant variables

An approach for Secured Image Transmission: A High Capacitive and Confidentiality based Image Steganography using Private Stego-Key

In the proposed paper an approach for image transmission with security and also improvement of the gray-scale (8-bit image) image flexible stenographic system using LSB approach. In this process a secret key of 80 bits is applied while embedding the message into the cover image. To provide high security and also confidentiality of the data a key stego-key is applied. The proposed method the information bits are embedded adaptively into the cover-image pixels. With this method a high embedding capacity in terms of hiding the data is provided and also better imperceptibility is also achieved. The major advantage of this method verifies by the Security method of Digital Signature. It is to be verified whether the attacker has made  a trials to change the Secret information in the  present inside the stego-image which is intended to be kept secret throughout the communication process. In this technique the embedding process to hide the message data present in the transformed spatial domain of the cover image and makes use of a simple Exclusive-OR  operation based on  Security checking method of  verifying the signature digitally by using key size value of 140 bits is used to check the integrity from the stego-image. The confidential data which is embedded can be retrieved from stego-images. The security level is enhanced by using the stego key and by adaptive steganography data inconspicuousness is improved

Predicting Heart disease using Machine Learning

in recent years a spike is seen in mortality linked to heart disease. In developed countries mortality linked to heart diseases have seen a gradual decrease due to the availability of better medical facilities and public awareness but on the other hand in developing countries like India and other south Asian countries alarming increment of mortality linked to heart disease has been seen in recent years. According to a research published in Indian heart journal India has seen a 4 fold increment in mortality linked to heart disease in past 40 years [1]. Abundant amount of data is collected by various medical institutions in past a decade. The data is available on various open source platforms like UCI, KAGGLE, and other Government websites.in this paper we will review all the techniques of data mining, machine learning and deep learning  used by the researches previously on these open source datasets. So that we can propose a better technique for early prediction of heart disease using machine learning and deep learning models