Istraživanje poznavanja mrežnoga pedagoškog sadržaja nastavnika prirodnih predmeta

The purpose of this study was to investigate the web pedagogical content knowledge of science teachers. As a mixed method design, this study was carried out with science teachers. A total of 229 science teachers participated in the quantitative part of the study, and 17 science teachers with different year experience took part in the qualitative part. Quantitative data in the study were collected through the Web Pedagogical Content Knowledge Scale, and the qualitative data were collected by a semi-structured interview. The obtained quantitative data were analyzed using descriptive statistics, Mann-Whitney U test and Kruskal-Wallis H test. The content analysis was used on the qualitative data. The quantitative results of the research indicated that the levels of teachers’ self-efficacy perceptions regarding web pedagogical content knowledge were very high. Moreover, the scores obtained from the overall scale and its sub-dimensions significantly differed with regards to work experience of science teachers. The qualitative findings of the study revealed that science teachers made use of the Web for lectures, experiments, practice, visual support, videos, and compensating the lack of materials. It was also emphasized that teachers should be educated to use the Web in their teaching practices.Cilj ovoga istraživanja bio je ispitati poznavanje mrežnoga pedagoškog sadržaja nastavnika prirodnih predmeta. Istraživanje je zasnovano na dizajnu miješanih metoda i provedeno je s uzorkom nastavnika prirodnih predmeta, koji je obuhvatio ukupno 229 nastavnika u kvalitativnom dijelu studije i 17 nastavnika prirodnih predmeta, s različitim iskustvom, u kvalitativnom dijelu istraživanja. Kvantitativni podatci u istraživanju sakupljeni su upotrebom Skale poznavanja mrežnoga pedagoškog sadržaja, a kvalitativni podatci sakupljeni su polustrukturiranim intervjuom. Deskriptivne statistika, Mann-Whitney U test i Kruskal-Wallis H test upotrijebljeni su za analizu kvantitativnih podataka, a metodom analize sadržaja obrađeni su kvalitativni podatci. Kvantitativni rezultati istraživanja pokazuju vrlo visoke razine percepcije samoučinkovitosti vezane za poznavanje mrežnoga pedagoškog sadržaja nastavnika prirodnih predmeta. Osim toga, rezultati dobiveni primjenom sveukupne Skale i njezinih poddimenzija značajno se razlikuju s obzirom na iskustvo nastavnika. Kvalitativni rezultati studije otkrili su da nastavnici prirodnih predmeta koriste mrežu za predavanja, eksperimente, praksu, vizualnu podršku, videozapise i kompenzaciju manjka materijala. Također je naglašeno da nastavnici trebaju biti obrazovani kako bi koristili mrežu u svojim praksama poučavanja

CVaR-based stochastic wind-thermal generation coordination for Turkish electricity market

Uncertainties in wind power forecast, day-ahead and imbalance prices for the next day possess a great deal of risk for the profit of generation companies participating in a day-ahead electricity market. Generation companies are exposed to imbalance penalties in the balancing market for unordered mismatches between associated day-ahead power schedule and real-time generation. Coordination of wind and thermal power plants alleviates the risks raised from wind uncertainties. This paper proposes a novel optimal coordination strategy by balancing wind power forecast deviations with thermal units in the Turkish day-ahead electricity market. The main focus of this study is to provide an optimal trade-off between the expected profit and the risk under wind uncertainty through conditional value at risk (CVaR) methodology. Coordination problem is formulated as a two-stage mixed-integer stochastic programming problem, where scenario-based wind power approach is used to handle the stochasticity of the wind power. Dynamic programming approach is utilized to attain the commitment status of thermal units. Profitability of the coordination with different day-ahead bidding strategies and trade-off between expected profit and CVaR are examined with comparative scenario studies

Comparing the short - term outcomes and complications of monopolar and bipolar transurethral resection of bladder tumors in patients with coronary artery disese: a prospective, randomized, controlled study

ABSTRACT Introduction: To compare the perioperative outcomes and complications of monopolar and bipolar transurethral resection of bladder tumors (TURBT) in patients with coronary artery disease (CAD). Materials and Methods: A total of 90 CAD patients with newly diagnosed bladder cancer who underwent TURBT were randomized into monopolar TURBT (M-TURBT) and bipolar TURBT (B-TURBT) groups. Primary outcome was safety of the procedures including obturator jerk, bladder perforation, clot retention, febrile urinary tract infection and TUR syndrome. The secondary outcome was the efficacy of TURBT procedures, including complete tumor resection, sampling of the deep muscle tissue and sampling of the qualified tissues without any thermal damage. Results: Mean ages of the patients in M-TURBT and B-TURBT groups were 71.36±7.49 and 73.71±8.15 years, respectively (p=0.157). No significant differences were found between M-TURBT and B-TURBT groups regarding complete tumor resection (76.2% vs. 87.5%, p=0.162) and muscle tissue sampling rates (71.4% vs. 64.6%,p=0.252). Obturator jerk was detected in 16.7% of the patients in M-TURBT group and 2.1% in B-TURBT group (p=0.007). No statistically significant differences were found between the groups regarding intraoperative and postoperative complications. Conclusions: Both monopolar and bipolar systems can be used safely and effectively during TURBT procedure in CAD patients. Due to the more frequently seen obturator jerk in M-TURBT than B-TURBT, careful surgical approach is needed during M-TURBT

Double-sling procedure for the surgical management of stress urinary incontinence with concomitant anterior vaginal wall prolapse

To assess the safety, efficacy of double-sling procedure (DS) for the surgical management of stress urinary incontinence (SUI) with concomitant anterior wall prolapse (AVWP) and to identify if less synthetic material implantation will decrease the complication rates without decreasing the high cure rates

Do severe obese patients with stress urinary incontinence benefit from transobturator tape procedure? 3-year surgical outcome

Introduction: We evaluate the impact of severe obesity on surgical outcomes of the transobturator tape (TOT) procedure in patients with stress urinary incontinence (SUI)

Long-term outcomes of transobturator tape procedure in women with stress and mixed urinary incontinence: 5-year follow-up

BACKGROUND: The aim of this study was to compare the postoperative outcomes and complications of transobturator tape (TOT) procedure in women with mixed urinary incontinence (MUI) and stress urinary incontinence (SUI) in long term follow-up

Comparison of Guy and Clinical Research Office of the Endourological Society Nephrolithometry Scoring Systems for Predicting Stone-Free Status and Complication Rates After Percutaneous Nephrolithotomy: A Single Center Study with 437 Cases

Purpose: To compare the Guy and Clinical Research Office of the Endourological Society (CROES) scoring systems in predicting postpercutaneous nephrolithotomy (PCNL) stone-free rate and complications. Patients and Methods: A total of 437 patients who underwent PCNL for renal stones were included in the recent retrospective study. All stones were evaluated with CT preoperatively. Mean stone diameter was 701.52510.65mm(2). Guy and CROES nephrolithometry scores were calculated for each patient, and their correlation with stone-free status, operative and fluoroscopy time, and length of hospital stay was evaluated. Post-PCNL stone status was evaluated with plain radiography of the kidneys, ureters, and bladder. Postoperative complications were graded according to the modified Clavien classification, and the correlation of both scoring systems with postoperative complications was also investigated. Results: The mean Guy grade was 2.28 +/- 1.12, and the mean CROES score was 196.92 +/- 65.89. The overall stone-free rate was 75.1%. There was a significant correlation between the Guy stone score (GSS) and CROES score and stone-free status (P250mL), and operative time. Conclusion: Both GSS and CROES nomograms had comparable accuracies in predicting post-PCNL stone-free status. Different from the previous reports, our results showed that both nomograms were predictive of overall complications, EBL, and operative time

Do severe obese patients with stress urinary incontinence benefit from transobturator tape procedure? 3-year surgical outcome

INTRODUCTION: We evaluate the impact of severe obesity on surgical outcomes of the transobturator tape (TOT) procedure in patients with stress urinary incontinence (SUI). METHODS: In total, 32 women with severe obesity (body mass index [BMI] >35 kg/m(2)) were included in the study. All patients were preoperatively evaluated with history, pelvic examination, ultrasonography, and cough stress test. All patients completed the International Consultation on Incontinence Questionnaire-Short form (ICIQ-SF) preoperatively and at the postoperative follow-up. Cure of incontinence was defined as being completely dry after surgery. Cure was assessed subjectively and objectively. Subjective improvement defined as an International Consultation on Incontinence Questionnaire-Short form (ICIQ-SF) score ≤12 and satisfaction with surgery. Failure was defined as having no change or worsening of urinary incontinence after surgery. Postoperative patient satisfaction was assessed using a visual analog scale. RESULTS: The mean follow-up time and mean BMI were 40.9 ± 20.9 months and 38 ± 3 kg/m(2), respectively. According to preoperative ICIQ-SF questionnaire scores, 20 patients (62.5%) had severe and 12 patients (37.5 %) had very severe urinary incontinence symptoms. No patient had slight or moderate symptoms. None of the patients experienced worsening symptoms after surgery. Objective cure, subjective cure, subjective improvement and patient satisfaction rates were 81.2%, 46.8%, 37.5%, and 84.3% respectively. Our overall complication rate was 9.3%. None of the patients experienced intraoperative complications. CONCLUSION: In experienced hands, TOT is an effective and safe procedure to treat SUI, with minimal complications in severe obese women