DSOGI-PLL based power control method to mitigate control errors under disturbances of grid connected hybrid renewable power systems

The control of power converter devices is one of the main research lines in interfaced renewable energy sources, such as solar cells and wind turbines. Therefore, suitable control algorithms should be designed in order to regulate power or current properly and attain a good power quality for some disturbances, such as voltage sag/swell, voltage unbalances and fluctuations, long interruptions, and harmonics. Various synchronisation techniques based control strategies are implemented for the hybrid power system applications under unbalanced conditions in literature studies. In this paper, synchronisation algorithms based Proportional-Resonant (PR) power/current controller is applied to the hybrid power system (solar cell + wind turbine + grid), and Dual Second Order Generalized Integrator-Phase Locked Loop (DSOGI-PLL) based PR controller in stationary reference frame provides a solution to overcome these problems. The influence of various cases, such as unbalance, and harmonic conditions, is examined, analysed and compared to the PR controllers based on DSOGI-PLL and SRF-PLL. The results verify the effectiveness and correctness of the proposed DSOGI-PLL based power control method

The evaluation of the effect of vitamin D replacement on the symptoms of carpal tunnel syndrome in patients with low vitamin D levels

Aim: To evaluate the effect of vitamin D replacement on carpal tunnel syndrome (CTS) symptoms and signs in CTS patients with low vitamin D levels. Methods: This study was designed prospective observably. The patient population was admitted to the EMG (electromyography) laboratory in a tertiary hospital’s Physical Medicine and Rehabilitation Department between 1 January and 31 July 2018.  Initially, 55 patients were included in the study. The patients were categorized into two groups as group 1 (<10 ng / ml) and group 2 (10-20 ng / ml) according to the vitamin D levels. A total of 39 patients and 63 wrists, 17 patients in group 1 (28 wrists) and 22 patients in group 2 (35 wrists), were included in the analysis. Results: There was a statistically significant decrease in visual analogue scale and quick arm-shoulder-hand disability score in two groups when compared before treatment. In two groups, there was a significant improvement in grip and pinch strength after treatment.  At the same time, after treatment we showed that there was a statistically significant increase in median nerve sensory amplitude in two groups. The increase in median nerve sensory velocity was significant in group 2 whereas it was not statistically significant between group 1 vs group 2. Conclusions: Vitamin D replacement can improve symptoms, functional status and electrophysiological findings in CTS patients with low vitamin D levels

Nephrolithiasis with Bardet-Biedl syndrome in a three-year-old girl: A case report

Bardet-Biedl syndrome is a multisystemic developmental disorder diagnosed onthe basis of the presence of obesity, retinal defects, polydactyly, hypogonadism,renal dysfunction, and learning disabilities. Renal disease is clinicallyheterogeneous, but is recognized as a cardinal feature and is a major cause ofmortality in BBS. We here presented a three-year-old girl with renal stone andBardet-Biedl syndrome

Re-emergence of genotype G9 during a five-and-a-half-year period in Turkish children with rotavirus diarrhea.

This study was done to understand the dynamics of rotavirus genotype distribution in Turkish children. Samples were collected from January 2006 through August 2011 from children at a hospital in Ankara. Rotavirus was detected in 28 % (241/889) of the samples. Genotype G9P[8] was predominant (28 %), followed by G1P[8] (16.3 %) and G2P[8] (15.9 %). G9 was absent in the samples from 2006 and 2007 and then re-emerged in 2008 and increased gradually. Phylogenetic analysis showed that Turkish G9 rotaviruses of the present study formed a sublineage with strains from Italy and Ethiopia, possibly indicating spread of a clone in these countrie

Comparison of Survival Rates, Tumor Stages, and Localization in between Obese and Nonobese Patients with Gastric Cancer

Purpose. In this study we tried to determine the association between body-mass index (BMI), survival rate, and the stage of tumor at the time of diagnosis in patients with gastric cancer. Methods. A total of 270 gastric cancer patients’ hospital records were retrospectively evaluated. Patients were grouped according to their BMI at the time of tumor diagnosis. Tumor stages at admission were compared according to their BMI values. Results. There were no differences in OS among BMI subgroups (p=0.230). The percent of patients with stage III tumor was significantly higher in nonobese while the percent of stage IV tumor was surprisingly higher in obese patients (p was 0.011 and 0.004, resp.). Percent of patients who did not have any surgical intervention was significantly lower in overweight and obese patients than normal and/or underweight patients. Conclusions. At the time of diagnosis, obese patients had significantly higher percent of stage IV tumor than nonobese patients. Despite of that, there were no differences in survival rates among BMI subgroups. Our study results are consistent with “obesity paradox” in gastric cancer patients. We also did not find any relationship between BMI and localization of gastric tumor

Potential carcinogenic erionite from Lessini Mounts, NE Italy: Mineralogical and chemical characterization

Exposure of humans to erionite fibers of suitable morphology and dimension has been unambiguously linked to the occurrence of malignant mesothelioma. For this reason, a morphological, morphometrical, mineralogical, and chemical investigation was performed on two representative samples of potential carcinogenic, fibrous erionite from Lessini Mounts, northeastern (NE) Italy, which has not apparently been examined previously. The first sample is erionite-Ca with an extremely fibrous, hair-like and flexible appearance, and growth in intimate association with levyne. The second sample is erionite-Ca with prismatic to acicular crystals and rigid behavior, enriched in K+ and Ca2+ extra-framework cations. Although erionite is a nominally Fe-free phase, iron (Fe) was detected in low amounts in all the analyzed crystals. In both the investigated samples, erionite is present as individual fibers of respirable size. Considering that the toxicity and carcinogenic potential of erionite is associated with its size parameters, together with its in vivo durability and high surface area, most of the investigated fibers may also be potentially carcinogenic. The presence of erionite in extensively quarried and largely employed volcanic rocks, suggesting the need for detailed health-based studies in the region

Optimization of corn, rice and buckwheat formulations for gluten-free wafer production

PubMed: 26446284Gluten-free baked products for celiac sufferers are essential for healthy living. Cereals having gluten such as wheat and rye must be removed from the diet for the clinical and histological improvement. The variety of gluten-free foods should be offered for the sufferers. In the study, gluten-free wafer formulas were optimized using corn, rice and buckwheat flours, xanthan and guar gum blend as an alternative product for celiac sufferers. Wafer sheet attributes and textural properties were investigated. Considering all wafer sheet properties in gluten-free formulas, better results were obtained by using 163.5% water, 0.5% guar and 0.1% xanthan in corn formula; 173.3% water, 0.45% guar and 0.15% xanthan gum in rice formula; 176% water, 0.1% guar and 0.5% xanthan gum in buckwheat formula. Average desirability values in gluten-free formulas were between 0.86 and 0.91 indicating they had similar visual and textural profiles to control sheet made with wheat flour. © SAGE Publications

Determination of stickiness values of different flour combinations

Throughout the process of bakery production, dough stickiness is a widespread problem and is influenced by many factors. Reliable, quick and quantitative methods are needed for measurement of dough stickiness in baking industry. In this study, three different flours were used (F1, F2 and F3) and 12% wheat starch and 2% vital gluten were added to those flours to widen protein content of each flour sample. Stickiness values of prepared doughs were measured using SMS/Chen-Hoseney unit at different resting times (0, 20 and 40 mins). Stickiness (g), work of adhesion (g.s) and dough strength/cohesivenes (mm) values were measured for comparison. Obtained data from dough with F1 was significantly different from other flours (P<0.05). Protein content and resting time have changed dough stickiness value. A positive relationship was found between farinograph water absorption and dough stickiness of flour. Stickiness value increased with water uptake of flour. © 2012 De Gruyter