Microgrids: Studies on Generalization and Protection

Bu çalışmada akıllı ağların en önemli güç katmanı uygulamaları olan dağıtık üretim ve mikro ağlar, uygulama kolaylığı sağlaması amacıyla genelleştirilmeye çalışılmıştır. Öncelikle genelleştirilmiş dağıtık üreteç modeli ve kaynakları belirlendikten sonra alçak gerilim yerleşim alanlarında yenilenebilir enerji kaynaklarının yaygın olarak kullanımına olanak sağlayan bir mikro ağ yapısı ve dağıtım otomasyon mimarisi önerilmiştir. Önerilen felsefe yenilenebilir kaynakların mevcut dağıtım şebekelerine asgari maliyetle entegrasyonunu sağlayacak şekilde tasarlanmıştır. Çalışmadaki amaç yenilenebilir kaynakların yaygın kullanımıyla birlikte ortaya çıkan durumda akıllı ağlarda yenilenebilir kaynakların entegrasyonu konusunda standart bir uygulama prensibi sağlamaktır

CEP-Controlled Molecular Dissociation by Ultrashort Chirped Laser Pulses

We demonstrate and characterize that a carrier-envelope-phase (CEP)-controlled ultrashortchirped field is an efficient and robust mechanism to modify the dissociation dynamics of molecularhydrogen. Different dissociation pathways are collectively induced and their interference contributeto the kinetic energy release spectra. Chirping is able to efficiently manipulate the interferencesof different dissociation pathways. We demonstrate a linear relationship between chirp and CEP-dependence, dissociation as well as directional electron localization

Mucopolysaccharidosis Type-II with Pathognomonic Skin Appearance: A Case with Pebbling Sign

Mucopolysaccharidosis type-II (MPS-II) is an X-linked lysosomal storage disorder. Here, we report an 8-year-old boy with pebbling sign in the scapular region, coarse facies, claw hand, diastolic murmur, and hepatomegaly. With decreased iduronate-2-sulfatase activity and hemizygous mutation in the IDS gene, the diagnosis was MPS-II. Pebbling sign is a rare but pathognomonic sign of MPS-II

Turkish EFL learners’ perceptions of native English-speaking teachers and non-native English-speaking teachers in higher education

The question of what makes a good teacher of English has aroused researchers’ interest for many years, and the existing studies comparing NESTs (native English-speaking teachers) and NNESTs (non-native English-speaking teachers) have focused mostly on students’ perceptions of these teachers. The current study aims to explore in the first phase if there is a meaningful difference between Turkish EFL learners’ perceptions of NESTs and NNESTs on their first encounter with them. The second phase explores whether any changes have occurred in students’ preconceptions regarding NESTs within the course of time. The participants are 120 Turkish monolinguals from a private university. Quantitative data was collected through questionnaires consisting of Likert-scale items in both phases. An interview session was added to the second phase to obtain more in-depth insights into students’ perceptions. The findings showed that students had neutral perceptions of NESTs and NNESTs. However, in the second phase, the data analysed via qualitative content analysis demonstrated that students’ perceptions were found to have positively changed for NESTs, particularly in terms of personality dimension. In both phases, students perceived NESTs in linguistic and professional dimensions, and NNESTs in pedagogical dimension rather positively.publisher versio

Investigation of Heschl's gyrus and planum temporale in patients with schizophrenia and bipolar disorder: A proton magnetic resonance spectroscopy study

Background: Superior temporal cortices include brain regions dedicated to auditory processing and several lines of evidence suggest structural and functional abnormalities in both schizophrenia and bipolar disorder within this brain region. However, possible glutamatergic dysfunction within this region has not been investigated in adult patients. Methods: Thirty patients with schizophrenia (38.67 ± 12.46. years of age), 28 euthymic patients with bipolar I disorder (35.32 ± 9.12. years of age), and 30 age-, gender- and education-matched healthy controls were enrolled. Proton magnetic resonance spectroscopy data were acquired using a 3.0. T Siemens MAGNETOM TIM Trio MR system and single voxel Point REsolved Spectroscopy Sequence (PRESS) in order to quantify brain metabolites within the left and right Heschl's gyrus and planum temporale of superior temporal cortices. Results: There were significant abnormalities in glutamate (Glu) (F(2,78) = 8.52, p < 0.0001), N-acetyl aspartate (tNAA) (F(2,81) = 5.73, p = 0.005), creatine (tCr) (F(2,83) = 5.91, p = 0.004) and inositol (Ins) (F(2,82) = 8.49, p < 0.0001) concentrations in the left superior temporal cortex. In general, metabolite levels were lower for bipolar disorder patients when compared to healthy participants. Moreover, patients with bipolar disorder exhibited significantly lower tCr and Ins concentrations when compared to schizophrenia patients. In addition, we have found significant correlations between the superior temporal cortex metabolites and clinical measures. Conclusion: As the left auditory cortices are associated with language and speech, left hemisphere specific abnormalities may have clinical significance. Our findings are suggestive of shared glutamatergic abnormalities in schizophrenia and bipolar disorder. © 2013 Elsevier B.V