Zekeriya Aktürk

Comparison of dimension reduction methods using patient satisfaction data

Abstract In this study, we compared classical principal components analysis (PCA), generalized principal components analysis (GPCA), linear principal components analysis using neural networks (PCA-NN), and non-linear principal components analysis using neural networks (NLPCA-NN). Data were extracted from the patient satisfaction query with regard to the satisfaction of patients from hospital staff, which was applied in 2005 at the outpatient clinics of Trakya University Medical Faculty. We found that percentages of explained variance of principal components from PCA-NN and NLPCA-NN were highest for doctor, nurse, radiology technician, laboratory technician, and other staff using a patient satisfaction data set. Results show that methods using NN which have higher percentages of explained variances than classical methods could be used for dimension reduction.

Sexual activity among Turkish adolescents: Once more the distinguished male

UNLABELLED The mean age of first sexual intercourse in Western countries is around 17 years and decreasing. Although Turkey is a bridge between East and West, embracing different cultures, little data are available on sexual issues in the population. METHODS A questionnaire was administered to all students in the study year 2004-2005, collecting demographic data, sexual activities, sexual and contraceptive attitudes, and contraceptive knowledge. Of 7,657 applicants invited, 3,970 questionnaires could be analyzed. RESULTS Median age of the participants was 18 years (48.0% female, 52% male). Median age at first sexual intercourse was 17 years for females and 16 years for males. 46.5% of the males and 3.0% of the females had sexual intercourse experience. While 68% of the girls had their first sexual intercourse with their lovers, this ratio was 44.8 % for males (Chi square = 59.963, p <.001). Significantly more girls than boys were planning to have their sexual partner as future spouses (Chi square = 55.569, p <.001). Three fourth of the males approved premarital sex for males; this ratio was reversed for females (Chi square = 574.838, p <.001). Although both sexes disapproved premarital sexual intercourse of women, girls were significantly more conservative in this regard (78.6% vs. 92.5%) (Chi square = 110.460, p <.001). CONCLUSION Although the adolescent sexual intercourse rate in Turkey is low compared with Western countries, there is a tendency to increase. Therefore, sexual education is needed. When augmenting sexual education programs in undergraduate education, gender difference and cultural factors should be further evaluated.

Omeprazole is More Effective than Famotidine for Preventing Acute Gastritis in Rats

PurposeAcute gastric mucosal lesions, which can develop within a few hours after polytrauma, shock, major operations, central nervous system lesions, or severe infection, cause about 33% of cases of gastrointestinal bleeding. We analyzed and compared the effectiveness of famotidine and omeprazole on acute gastric mucosal lesions.MethodsThirty male albino Wistar rats were given ketalar anesthesia after 12 h fasting, then immobilized and exposed to stress according to Brodie’s protocol, without restricting their respiration. We divided the rats into three groups of ten according to whether they were given famotidine, omeprazole, or normal saline (control group). All rats were ulcer-indexed according to the diameter of their ulcers. The stomach contents were aspirated for acid output and pH analysis, and sent to the laboratory. The total number of mast cells was also counted.ResultsOmeprazole was more effective than famotidine in keeping gastric pH high and lowering the total gastric acid output. Lower ulcer indexes in acute gastric mucosal erosions and better protected mucosal integrity were found in the omeprazole-treated rats.ConclusionOmeprazole prevents acute gastric mucosal erosions in rats more effectively than famotidine.

The Changing Rate of Suspected Rabies Bites after Begin to Act Animal Shelter in Erzurum City

OBJECTIVE We aimed to evaluate the relationship between establishing an animal shelter in Erzurum and the number of suspected rabies bites between the years 2005 and 2012. MATERIALS AND METHODS A retrospective, repeated cross-sectional study was planned in Erzurum in the year 2013. Records between the years 2005 and 2012 were obtained from the Communicable Diseases Department of the Erzurum Health Directorate. Data for 5789 cases exposed to suspected rabies bites were analyzed. RESULTS 5789 suspected rabies bites were encountered in Erzurum between the years 2005 and 2012. After establishing the animal shelter in 2009, 4239 dogs were collected from the streets within four years and 426 of them were released after immunization. Additionally, the following services were given in the animal shelter between 2009 and 2012: immunization of 2935 dogs, sterilization of 1735 dogs, and release of 2082 dogs back to the street. 4-years before the establishment of the animal shelter, the number of dog-bites had decreased from 3403 cases to 2386 cases; 4-years after the establishment of the shelter, it declined by 29.8%. While there were 1096 suspected rabies cases during the year 2008, this ratio decreased by 40.9% after the establishment of the animal shelter in the year 2009. During the year 2010, where we had the highest number of homeless dog collection to the animal shelter, the decrease in suspected rabies bites reached the maximum decrease, namely 51.0%. Spearman correlation analysis showed a strong negative correlation between the number of collected animals and suspected rabies bites (r = -0,862; p=0.006). CONCLUSION Suspected rabies cases are common in Turkey and some cases of rabies are encountered. The number of suspected rabies bites in Erzurum has decreased significantly after establishing the animal shelter. It is an evident that establishing rehabilitation centers for homeless animals in all cities will have an important role in controlling zoonotic diseases including rabies.