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

Psychosocial Adjustment to Illness and Methods of Coping with Stress Among Young Adults with Type 1 Diabetes

Aim: The present study was performed to evaluate the psychosocial adjustment to illness and methods of coping with stress among young adults with type 1 diabetes

Sexual Dysfunction and Sexual Quality of Life in Women with Diabetes: The Study Based on a Diabetic Center

This study was conducted on a cross-sectional basis for the purpose of determining the prevalence of sexual dysfunction (SD) and sexual quality of life in women with diabetes and, showing the correlation of them with some variables associated with diabetes. The study recruited 423 women with diabetes, through a diabetic center for control from January to December 2012. The data was collected with Socio-demographic and Disease Associated Properties Form, Women Sexual Function Index (FSFI) and Sexual Quality of Life Questionnaire-Women (SQLQ). The mean age of the women, who participated in the study, was 50.0 (SD = 11.3) and, their mean marital period was 30.0 (SD = 11.8). 83 % of the women had type 2 and, 17 % of them had type 1 diabetes and, their mean duration of disease is 11.4 (SD = 7.2). 60.5 % of the women expressed that their sexual desire decreased and, 61.7 % of them expressed that their frequency of sexual intercourse reduced after the diagnosis of their disease. According to the total FSFI scores, 80.4 % of the women had SD. The frequency of SD in women with type 2 diabetes (85.6 %) was significantly higher than that in women with type 1 diabetes (%55.6) (p < 0.001). The sexual quality of life of women with SD (62.7 +/- A 21.2) was significantly lower than that of those without SD (89.6 +/- A 9.9) (p < 0.001). According to these study results, SD was prevalent in women with diabetes, particularly those with type 2 diabetes and also their sexual quality of life was low in parallel with this

The first step of patient-specific design calvarial implant: A quantitative analysis of fresh parietal bones

WOS: 000445241400004BackgroundAccurate knowledge of the fracture of cranial bone can provide insight into the prevention of skull fracture injuries and help aid the design of energy-absorbing head protection systems and safety helmets. When cranial bone needs to be removed or is lost, subsequent reconstruction of the defect is necessary to protect the underlying brain, or correct esthetic deformities, or both. Ideal reconstruction of defected bone is possible utilizing a biocompatible implant with a bone-like design individualized for the specific patient. The purpose of this study is to investigate the anatomical and mechanical characteristics of fresh frozen human parietal bones and determine compliance of polylactic acid-based personalized three-dimensional implants in terms of mechanical properties in order to replace such defective bones.MethodsParietal bone specimens were extracted from 19 fresh frozen cadavers. Morphological parameters of individual bone specimens were measured using Image J software. Three-point bend tests were performed to extract Young's modulus and tensile strength of the specimens from the measured force and displacement data by modeling the bone specimens as curved linear elastic beams. Also, three-point bend tests were performed to polylactic acid-based three-dimensional replicas mimicking geometry of the bone specimens in order to determine whether the material's Young's modulus and tensile strength properties comply with parietal bones.ResultsEntire fresh parietal specimens were observed to be comprised of a three-layered structure: external layers consisting of compact, high-density cortical bone and the central layer consisting of low-density, irregularly porous bone structure. Mean thickness of three-layered structure was 6.251.46mm. Mean Young's modulus and tensile strength of the specimens were 1.401.34GPa and 44.56 +/- 21.94MPa, respectively where no statistically significant differences among genders were detected (p>0.05). Mean Young's modulus and tensile strength of the polylactic acid-based three-dimensional implants mimicking geometry of the bone specimens were 1.8 +/- 0.7GPa and 72.8 +/- 2.5MPa, respectively.ConclusionsPolylactic acid-based three-dimensional implants can be considered as acceptable candidates for temporary replacement of parietal defects in terms of mechanical properties.Level of Evidence: Not ratable

False allegation in abuse cases: a case report

WOS: 000259504800008Abuse and its complications are the important part of child and adolescent psychiatry services. Professionals who worked in this area can be faced with false abuse allegation. Treatment, ethic and forensic necessity are the most important difficulties in these cases. The aims of this study are to inform about of the false allegation case whose legal reporting procedures initiated by clinicians and to discuss this case from psychiatric, forensic and ethical point of views

Comparison of retention forces with various fabrication methods and materials in double crowns

PURPOSE. The purpose of this study was to analyze the retention force changes and wear behaviours of double crown systems over long-term use. MATERIALS AND METHODS. Ten groups, each consisting of six samples, were evaluated. Specifically, casting gold alloy primary crown - casting gold alloy secondary crown (AA), laser sintering primary crown - laser sintering secondary crown (LL), casting Cr alloy primary crown - casting Cr alloy secondary crown, (CC) zirconia primary crown - electroformed secondary crown (ZA), and CAD/CAM titanium alloy primary crown - CAD/CAM titanium alloy secondary crown (TT) groups were evaluated at cone angles of 4 degrees and 6 degrees. The samples were subjected to 5,000 insertion-separation cycles in artificial saliva, and the retention forces were measured every 500 cycles. The wear levels were analyzed via SEM at the beginning and end of the 5,000 cycles. RESULTS. In all samples, the retention forces increased when the conus angle decreased. The highest initial and final retention force values were found in the LL-4 degrees group (32.89 N-32.65 N), and the lowest retention force values were found in the ZA6 degrees group (5.41 N-6.27 N). The ZA groups' samples showed the least change in the retention force, and no wear was observed. In the other groups, wear was observed mostly in the primary crowns. CONCLUSION. More predictable, clinically relevant, and less excursive retention forces can be observed in the ZA groups. The retention force values of the LL groups were statically similar to those of the other groups, except the ZA groups