The Modify Version of Artificial Bee Colony Algorithm to solve Real Optimization problems

The Artificial Bee Colony(ABC) algorithm is one of the best applicableoptimization algorithm. In this work, we make some modifications toimprove the ABC algorithm based on convergence speed of solution. Inorder to, we add some conditions to selected food sources by bees. So, ifsolution have been enough near to optimal solution, then further search existaround the food sources. That, this is near to optimal solution because, wecan replace lower and upper bounds of food sources with smaller valuesrelate to last search. Therefore, the new search is near to optimal solution and after some iteration, optimal solution achieves. Finally, we illustrateconvergence speed of the MABC algorithm that is faster than ABCalgorithm. There are some examples.DOI:http://dx.doi.org/10.11591/ijece.v2i4.42

Emotional and academic effects of cyberbullying on students in a rural high school in the Limpopo province, South Africa

Background: The overwhelming use of Internet and social media among the youth in South Africa causes both negative and positive effects on the users. Cyberbullying is one manifestation of such negative effects. Rural high school students are not immune to this modern age social problem. To protect them against the possible hazards, it is important to study this phenomenon among this group of young poeple. Objectives: This study explored the extent of the use of Internet and social media, the forms and frequency of cyberbullying and their effects on the emotional well-being and academic performance of grades 8–10 students in a rural high school in Limpopo, South Africa. Method: This study used a mixed research approach. Eighty participants consisting of 50 females and 30 males from grades 8 to 10 in a rural high school participated in this survey and 6 purposefully selected victims of cyberbullying completed an interview schedule. Results: The majority of participants had access to cyber technology and used Facebook frequently. More than half of the participants experienced a wide variety of cyberbullying, sexual offence being the highest. They were negatively affected both emotionally and academically to the extent that some thought of suicide. Conclusion: Even though students in this rural high school have access to the latest cyber technology, they are not equipped to prevent or cope with its negative effects; hence, they suffer in solitude. The study recommends an anti-cyberbullying policy being established, as well as counselling at school, and advises stakeholders who intend to expand e-learning at schools to include cyber safety and supportive mechanisms in their programmes for successful implementation

A new kind of vortex pinning in superconductor / ferromagnet nanocomposites

This paper reports the observation of hysteresis in the vortex pinning in a superconductor / ferromagnetic epitaxial nanocomposite consisting of fcc Gd particles incorporated in a Nb matrix. We show that this hysteretic pinning is associated with magnetic reversal losses in the Gd particles and is fundamentally different in origin to pinning interactions previously observed for ferromagnetic particles or other microstructural features.Comment: Submitted to PR

Generalized Contractive Mappings and Weakly α

The aim of this paper is to present some coincidence and common fixed point results for generalized (ψ, φ)-contractive mappings using partially weakly G-α-admissibility in the setup of G-metric space. As an application of our results, periodic points of weakly contractive mappings are obtained. We also derive certain new coincidence point and common fixed point theorems in partially ordered G-metric spaces. Moreover, some examples are provided here to illustrate the usability of the obtained results

Delay in Diagnosis of Two Siblings with Severe Ocular Problems and Autoimmune Polyglandular Syndrome

Autoimmune polyendocrine syndrome type 1 (APS1) is a scarce polyendocrinopathy with autosomal recessive inheritance results from defects in the human autoimmune regulatory (AIRE) gene. In addition to three major manifestations of APS1 including mucocutaneous candidiasis, hypoparathyroidism, and Addison's disease, ophthalmic problems such as keratoconjunctivitis, dry eye, iridocyclitis, and cataract can be seen in these patients. In this article, we introduced two siblings presented with nail dystrophia, severe photophobia, and keratitis since early childhood which genetic examination revealed single nucleotide T>C translocation in their 2nd exon and heterozygous deletion mutation in their 12th exon

Heavy metals (Hg,Cd,Pb,Ni,Cu) concentrations in Euryglossa orientalis and sediments from Khur-e-Musa Creek in Khuzestan Province

Heavy metals contamination (Hg,Cd,Pb,Ni,Cu) in muscle of the fish Euryglossa orientalis and in sediments was assessed in 2007 in Khur-e-Musa Creek (Ahmadi and Ghanam). In total, 30 fish specimens and 18 sediment samples were collected and analyzed. Flame Atomic Absorption Spectrophotometer was used to determine contamination of the specimens with Cd, Pb, Ni, Cu, and cold vapor method was applied for Hg. Results showed 2.35, 0.99, 1.32, 14.48 and 5.71µg/g dry weight of the fish for Hg, Cd, Pb, Ni and Cu in muscle tissue, respectively. Metal levels in the muscle tissue were compared with standard values such as those of the World Health Organization (WHO), British Ministry of Agriculture, Fisheries and Food (MAFF), Australia National Health and Medical Research Council (NHMRC) and American Food and Drug Administration (FDA), based on which only Hg, Cd, and Ni showed higher than standard levels in Khur-e-Musa Creek (Ahmadi and Ghanam). Results showed 4.76, 2.52, 18.64, 119.91, 31.23µg/g dry weight for Hg, Cd, Pb, Ni and Cu in sediments, respectively

Is fluency being ‘neglected’ in the classroom? Teacher understanding of fluency and related classroom practices

This paper reports on a study examining second language (L2) teachers’ understanding of speech fluency and their self-reported classroom practices for promoting it. Qualitative and quantitative data collected from 84 L2 teachers in England were analysed to answer the research questions. In addition to the descriptive statistics and lexical frequency analysis used to explore teacher understanding of fluency, Rossiter, Derwing, Manimtim and Thomson’s (2010) framework was employed to analyse the teachers’ reported classroom practices. The results suggest that teachers often define fluency in a broad sense, with many using fluency and speaking ability interchangeably. Similarly, a large majority of the activities reported by the teachers were useful for enhancing speaking practice rather than focussing on fluency specifically. The findings underline the interaction between teacher understanding of fluency and their classroom practice (Borg, 2003), and highlight a mismatch between what fluency research recommends and what teachers do in class. Though the study highlights the complex and multifaceted nature of L2 oral fluency, we argue that adopting a narrower and more focused definition of fluency could help teachers take a more active and practical approach to promoting it in the classroom

Some fixed point theorems for generalized contractive mappings in complete metric spaces

We introduce new concepts of generalized contractive and generalized alpha-Suzuki type contractive mappings. Then, we obtain sufficient conditions for the existence of a fixed point of these classes of mappings on complete metric spaces and b-complete b-metric spaces. Our results extend the theorems of Ciric, Chatterjea, Kannan and Reich