System identification and reliability assessment of an industrial chimney under wind loading

Tokuc, M. Orcun,Soyoz, Serdar Techno-Press 2018 Wind and Structures, An International Journal (WAS Vol.27 No.5

This study presents the reliability assessment of a 100.5 m tall reinforced concrete chimney at a glass factory under wind loading by using vibration-based identified modal values. Ambient vibration measurements were recorded and modal values such as frequencies, shapes and damping ratios were identified by using Enhanced Frequency Domain Decomposition (EFDD) method. Afterwards, Finite Element Model (FEM) of the chimney was verified based on identified modal parameters. Reliability assessment of the chimney under wind loading was performed by obtaining the exceedance probability of demand to capacity distribution. Demand distribution of the chimney was developed under repetitive seeds of multivariate stochastic wind fields generated along the height of chimney. Capacity distribution of the chimney was developed by Monte Carlo simulation. Finally, it was found that reliability of the chimney is lower than code suggested limit values.

Comparison of the effects of articaine and bupivacaine in impacted mandibular third molar tooth surgery: a randomized, controlled trial

Tokuc, Berkay,Coskunses, Fatih Mehmet The Korean Dental Society of Anesthsiology 2021 Journal of Dental Anesthesia and Pain Medicine Vol.21 No.6

Background: The aim of this randomized, triple-blind trial was to determine the anesthetic, analgesic, and hemodynamic effects of articaine and bupivacaine in the extraction of impacted mandibular third molar teeth. Methods: Twenty-six patients who underwent removal of bilaterally symmetric mandibular third molars were randomly assigned to articaine and bupivacaine groups in a split-mouth design. The onset of anesthetic action, intraoperative comfort, total amount of solution used, duration of postoperative anesthesia and analgesia, rescue analgesic use, postoperative pain, intraoperative bleeding, and hemodynamic parameters were evaluated. Results: In the articaine group, the onset of anesthetic activity was faster, intraoperative comfort was greater, and effective anesthesia required less local anesthetic solution. The bupivacaine group showed a significantly longer duration of postoperative anesthesia and analgesia, in addition to lower visual analog scale values at 6 and 48 hours postoperatively. There were no significant differences between the two solutions regarding rescue analgesic medication use, intraoperative bleeding, or hemodynamics. Conclusion: Articaine showed greater clinical efficacy than bupivacaine in intraoperative anesthesia, achieving faster onset of anesthetic action and greater patient comfort while also requiring less reinforcement during surgery. However, bupivacaine was superior in terms of postoperative anesthesia, reducing postoperative pain due to its residual anesthetic and analgesic effects. Both anesthetic solutions led to similar hemodynamics at low doses in mandibular third molar surgery

System identification and reliability assessment of an industrial chimney under wind loading

M. Orcun Tokuc,Serdar Soyoz 한국풍공학회 2018 Wind and Structures, An International Journal (WAS Vol.27 No.5

This study presents the reliability assessment of a 100.5 m tall reinforced concrete chimney at a glass factory under wind loading by using vibration-based identified modal values. Ambient vibration measurements were recorded and modal values such as frequencies, shapes and damping ratios were identified by using Enhanced Frequency Domain Decomposition (EFDD) method. Afterwards, Finite Element Model (FEM) of the chimney was verified based on identified modal parameters. Reliability assessment of the chimney under wind loading was performed by obtaining the exceedance probability of demand to capacity distribution. Demand distribution of the chimney was developed under repetitive seeds of multivariate stochastic wind fields generated along the height of chimney. Capacity distribution of the chimney was developed by Monte Carlo simulation. Finally, it was found that reliability of the chimney is lower than code suggested limit values.

Evaluation of biopsies of oral and maxillofacial lesions: a retrospective study

Hatice Hosgor,Berkay Tokuc,Bahadır Kan,Fatih Mehmet Coskunses 대한구강악안면외과학회 2019 대한구강악안면외과학회지 Vol.45 No.6

Objectives: This study aimed to determine the prevalence of odontogenic cysts, tumors, and other lesions among reports in the archives of the Department of Oral and Maxillofacial Surgery at the Faculty of Dentistry affiliated with Kocaeli University collected over a four-year period. Materials and Methods: In this retrospective study, patient records from the archive of the Department of Oral and Maxillofacial Surgery from 2014 to 2018 were reviewed. Patient demographic information (age and sex) and lesion location were recorded and analyzed. Results: From a total of 475 files reviewed, odontogenic cyst was confirmed in 340 cases (71.6%), and odontogenic tumor was confirmed in 52 cases (10.9%). Regarding odontogenic cyst type, the most common was radicular cyst (216 cases), followed by dentigerous cyst (77 cases) and odontogenic keratocyst (23 cases). Among odontogenic tumors, the most frequent was odontoma (19 cases), followed by ossifying fibroma (18 cases) and ameloblastoma (9 cases). Giant cell granuloma was also reported in 35 cases. Conclusion: The distribution pattern of odontogenic cysts and tumors in our retrospective study is relatively similar to that reported in the literature. Complete clinical reports for final diagnosis of these lesions and routine follow-up examinations are very important for treatment.

Caregiver Burden and Quality of Life in Early and Late Stages of Idiopathic Parkinson’s Disease

Fatma Genç,Burcu Yuksel,Firdevs Ezgi Ucar Tokuc 대한신경정신의학회 2019 PSYCHIATRY INVESTIGATION Vol.16 No.4

ObjectiveaaIdiopathic Parkinson’s disease (IPD) is a chronic progressive neurodegenerative movement disorder characterized by motor and non-motor symptoms that affects patients’ quality of life and caregiver burden. The aim of our study was to assess the caregiver burden (CB) in early and late stages of disease and to search if there was a relationship between quality of life and CB. MethodsaaA total of 74 patients who were diagnosed as having IPD by a movement disorder neurologist according to United Kingdom Brain Bank Criteria and their caregivers were randomly selected for participation the study. Staging of PD was performed by the neurologist based on the Hoehn and Yahr (H&Y) Scale. Disease severity was determined using the Unified Parkinson’s Disease Rating Scale (UPDRS). CB was evaluated using the Zarit Caregiver Burden Inventory (ZCBI). The Hospital Anxiety and Depression Scale (HADS) and the Beck Depression Inventory (BDI) were used to assess anxiety and depressive symptoms in patients with IPD and their caregivers. The Short-Form Health Survey instrument (SF-36) was used to evaluate quality of life of the patients. The Mini-Mental State Examination (MMSE) was administered to patients to evaluate gross cognitive status. ResultsaaSeventy-four patients (male, 58.1%) were included in the study. The mean age of patients was 66.18±8.5 and the mean duration of disease was 67.23±41.8 months. According to the H&Y scale, the patients were divided into two groups; stage I–II as early stage and stage III–V as late stage. Group 1 (H&Y I–II) consisted of 40 patients, and group 2 (H&Y III–V) comprised 34 patients. The mean duration of disease and UPDRS scores were significantly higher in group 2 (p=0.003, p=0.001, respectively). Significant differences were found in group 2 according to BDI. There were significant differences between group 1 and 2 according to SF-36 subdomains such as general health, emotional role, social functioning, pain, and mental health (p=0.019, p=0.038, p=0.005, p=0.004, p=0.014, respectively). However, there were no significant differences between these two groups concerning CB. ConclusionaaAlthough CB was found in 35 (47.3%) caregivers in our study, we found no significant differences between the caregivers of patients with early and late-stage IPD patients. We thought that this might be due to strong family relationships and cultural dynamics in Turkey. Burden was found to be higher in depressive patients’ CGs and CGs who had depressive symptoms. It is important to recognize depressive symptoms earlier to protect the relationship between the CG and the patient because the main providers of care are family members.

Correlation between preoperative pressure pain assessments and anxiety and postoperative pain in impacted lower third molar surgery

Hatice Hosgor,Fatih Mehmet Coskunses,Berkay Tokuc 대한구강악안면외과학회 2021 대한구강악안면외과학회지 Vol.47 No.1

Objectives: The aim of this study was to evaluate correlations between anxiety and preoperative pressure pain assessments and postoperative pain and analgesic requirements in impacted lower third molar tooth surgery. Materials and Methods: This prospective study enrolled 60 patients who underwent impacted lower third molar surgery. The preoperative State- Trait Anxiety Inventory-I (STAI-I), pressure pain threshold, and pressure pain tolerance scores were measured. At 2, 4, 6, 12, and 24 hours, and at 6 days following surgery, the patients scored their pain on the visual analogue scale and recorded their analgesic drug usage. The data were evaluated, and the results were statistically analyzed. Results: Of the 60 patients, 38 were female. Mean age was 24.62±7.42 years. The study found no relationship between preoperative pressure pain assessments and postoperative pain (P>0.05). There was also no relationship observed between preoperative STAI-I scores and postoperative pain (P>0.05). However, there was a positive correlation between operation time and total medication taken (P<0.05). Conclusion: Preoperative pressure pain threshold, pressure pain tolerance, and anxiety level had no significant effects on postoperative pain and analgesic requirements in impacted lower third molar surgery.

Impact of PSA and DRE on Histologic Findings at Prostate Biopsy in Turkish Men Over 75 Years of Age

Verim, Levent,Yildirim, Asif,Basok, Erem Kaan,Peltekoglu, Erol,Pelit, Eyup Sabri,Zemheri, Ebru,Tokuc, Resit Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.10

Prostate specidic antigen (PSA) and digital rectal examination (DRE) are the known predictive factors for positive prostate biopsies differing according to the age, region and race. There have been only very limited studies about the impact of PSA on histological findings at prostate biopsy in Turkey. The aim of this study was to evaluate the impact of PSA and clinical stage on histologic findings of prostate biopsy in men older than 75 years of age as a first study in the Turkish population. A total of 1,645 consecutive prostate biopsies were included, with 194 men aged 75 or older. Cancer was identified in 104 patients (53.6%). Of the 104 positive biopsies, Gleason scores were less than 7 in 53 (49%) patients, 7 or greater in 51 (51%) patients. Positive prostate biopsies were significantly correlated with advanced age (p=0.0001), abnormal DRE (p=0.0001) and raised PSA (p=0.0001). The prostate volume was significantly correlated with advanced age especially in prostate cancer patients over 75 years, compared with those under 75 (p=0.0001). These results are useful for counseling men older than 75 years for prostate cancer detection. However, PCa screening decisions are currently based on urologist judgment and detection of latent asymptomatic disease is an important concern regarding costs, overdiagnosis, overtreatment and quality of life (QOL) for men aged 75 years and older. Healthy old patients with a long life expectancy need to be carefully evaluated for eligibility for PCa screening.