Artificial bee colony algorithm for thermohydraulic optimization of flat plate solar air heaters

Cihan Yıldırım,İbrahim Aydoğdu 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.7

Determination of thermal efficiency is not a sufficient tool for solar air heaters because of disregarded energy consumption by fans. Most of the solar air heaters are equipped with fans in order to overcome pressure drops. Thermohydraulic efficiency is more favorable than thermal efficiency in terms of the design of solar energy conversion systems. In this present study, Artificial bee colony (ABC) based optimum design and operation algorithm is developed for Single pass solar air heater (SPSAH) and for Double parallel pass solar air heater (DPPSAH) which maximizes thermohydraulic efficiency. In order to solve the algorithm, channel depth is treated as a design variable, and air mass flow rate is defined as an operation parameter. Furthermore, energy balance equations are written for solar air heaters and solved for steady-state condition. As a result, optimum design and operation values are obtained from the algorithm for different collector lengths and solar insolation levels.

Comparison of pain and proper sample status according to usage of tenaculum and analgesia: a randomized clinical trial

( Cihan Comba ),( Gökhan Demirayak ),( Sakir Volkan Erdogan ),( Ibrahim Karaca ),( Omer Demir ),( Oguz Guler ),( Isa Aykut Ozdemir ) 대한산부인과학회 2020 Obstetrics & Gynecology Science Vol.63 No.4

Objective Colposcopic biopsy is a discomfortable procedure. Additionally, it creates negative influence on sexuality. This study aimed to investigate the relationships among tenaculum, pain perception, and biopsy size during colposcopy. Methods In total, 228 patients who underwent colposcopy-directed biopsy were included, and randomized into 4 groups based on whether analgesic and tenaculum were used and replaced (tenaculum with n=58/without analgesic n=56, no tenaculum replacement with n=57/without analgesic n=57). Lidocaine hydrochloride (40 mg) plus adrenaline (0.025 mg) was administered in the analgesic groups. The pain was assessed using a linear visual analog scale. The biopsy specimen size was measured in millimeters. Results The mean age of the patients was 42.85±8.88 years. The most frequent colposcopy indications were atypical squamous cells of undetermined significance and human papilloma virus-positive results on cervical cytology (30.2%; n=69). Low- and high-grade intraepithelial lesions were noted in 14.91% (n=34) and 10.96% (n=25) women through colposcopy-directed biopsy results, respectively. Tenaculum replacement increased pain perception in the without analgesic group; however, no statistically significant differences were noted between of the groups with and without tenaculum replacement with analgesic. The size and number of biopsy specimens were not associated with tenaculum replacement and analgesic use. Conclusion Administration of analgesics decreased discomfort and pain in patients. Tenaculum replacement aided colposcopists in manipulating the cervix. Additionally, administration of analgesics relieved pain in the tenaculum replacement group.

Role of Re-irradiation in Salvage Treatment of Glioblastoma Multiforme

Cihan, Yasemin Benderli Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.5

Role of Digital Infrared Thermal Imaging in Radiation Therapy Planning and Toxicity

Cihan, Yasemin Benderli,Sarigoz, Talha Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.8

Comparison of optimized roughness parameters of some artificially roughened solar air heaters

Cihan Yıldırım,Ibrahim Aydoğdu 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.10

In this study, theoretical investigation derived from experimental correlations and the artificial bee colony optimization method are used to determine the optimum geometrical parameters which maximize the termohydraulic efficiency of some artificially roughened solar air heaters. Nine different roughness types are considered, i.e., transverse wedge-shaped rib roughness, protrusion roughness, multiple v-ribs roughness, rib-grooved roughness, metal grit ribs roughness, compound turbulators roughness, v-shaped rib roughness, arc-shaped wire roughness, and discrete v-down ribs roughness. The effects of the artificial roughness element parameters on the best thermal performance and the thermohydraulic performance are compared. Optimum results are obtained with multiple v-ribs roughness for the low mass flow rate (MFR = 0.1 kg/s) and with protrusion roughness for the high mass flow rate (MFR = 0.5 kg/s). Optimum roughness parameters and corresponding thermal and thermohydraulic efficiencies are tabulated for each solar collector type. As expected, increased roughness geometry leads to higher pressure loss and reduces thermohydraulic efficiency.

Lack of Prognostic Value of Blood Parameters in Patients Receiving Adjuvant Radiotherapy for Breast Cancer

Cihan, Yasemin Benderli,Arslan, Alaettin,Cetindag, Mehmet Faik,Mutlu, Hasan Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.10

Aim: To determine prognostic value of blood parameters on overall and progression-free survival in cases received adjuvant radiotherapy and chemotherapy with diagnosis of stage I-III breast cancer. Materials and Methods: We retrospectively reviewed files of 350 patients with non-metastatic breast cancer who were treated in the Radiation Oncology Department of Kayseri Teaching Hospital between 2005 and 2010. Pretreatment white blood cell (WBC), neutrophil, monocyte, basophil and eosinophil counts, and the neutrophil/lymphocyte ratio (NLR) and platelet lymphocyte ratio (PLR) were recorded. The relationship between clinicopathological findings and blood parameters was assessed. Results: Overall, 344 women and 6 men were recruited. Median age was $55.3{\pm}0.3$ years (range: 22-86). Of the cases, 243 (61.4%) received radiotherapy while 329 (94.3%), received chemotherapy and 215 (61.4%) received hormone therapy. Mean overall survival (OS) and progression-free survival (PFS) was 84.4 and 78.8 months, respectively. During follow-up, 48 patients died due to either disease-related or non-related causes. Local recurrence was detected in 14 cases, while distant metastasis was noted in 45 cases. In univariate analysis, age, pathology, perinodal invasion were significantly associated with overall survival, whereas gender, stage and hormone therapy were significantly associated with progression-free survival. In multivariate analysis, histopathological diagnosis (OR: 0.3; 95%: 0.1-0.7; p=0.006) and perinodal invasion (OR: 0.1; 95% CI: 0.1-1.3; p=0.026) were significantly associated with overall survival, whereas tumor stage (OR: 2.1; 95% CI: 0.0-0.7; p=0.014) and hormone therapy (OR: 2.1; 95%: 1.2-3.8; p=0.010) were significantly associated with progression-free survival. Conclusions: It was found that serum inflammatory markers including WBC, neutrophil, lymphocyte and monocyte counts, and NLR and PLR had no effect on prognosis in patients with breast cancer who underwent surgery and received adjuvant radiotherapy and chemotherapy.

Relationship of Body Mass Index with Prognosis in Breast Cancer Patients Treated with Adjuvant Radiotherapy and Chemotherapy

Cihan, Yasemin Benderli Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.10

Background: The aim of this study was to investigate the relationship of body mass index with overall and progression-free survival as well as other prognostic factors of breast cancer in patients with non-metastatic breast cancer. Materials and Methods: We retrospectively reviewed 456 patients diagnosed with breast cancer in the Radiation Oncology department of Kayseri Teaching Hospital between 2005 and 2013. We investigated relationship of body mass index with prognosis and other prognostic factors. Results: The study included 456 patients (447 women and 9 men). Mean age at presentation was 55.6 years. Of the cases, 96.9% underwent modified radical mastectomy and 95.0% received chemotherapy, while 82.4% received radiotherapy and 60.0% were given hormone therapy. Body mass index was >25 mg/kg2 in 343 cases. Five- and 10-years overall survival rates were 77% and 58% whereas progression-free survival rates were 65% and 49%, respectively. In univariate analyses, factors including stage (p=0.046), tumor diameter (p=0.001), lymph node metastasis (p=0.006) and body mass index (p=0.030) were found to be significantly associated with overall survival, while perinodal involvement was found to be significantly associated with progression-free survival (p=0.018). In multivariate analysis, stage (p=0.032; OR: 3.8; 95% CI: 1.1-13), tumor diameter (p<0.000; OR: 0.0; 95% CI: 0.0-0.3), lymph node metastasis (p=0.005; OR: 0.0; 95% CI: 0.0-0.5) and BMI (p=0.027; OR: 0.02; 95% CI: 0.0-0.8) remained as significantly associated with OS. Conclusions: In our study, it was seen that overall survival time was shorter in underweight and obese patients when compared to normal weight patients.

ERCC1 as a Biological Marker Guiding Management in Malignant Pleural Mesothelioma

Cihan, Yasemin Benderli,Ozturk, Ahmet,Arslan, Alaettin,Deniz, Kemal,Baran, Munevver,Karaca, Halit Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.10

Background: To determine prognostic value of excision repair cross-complementation 1 (ERCC1) in patients with malignant pleural mesothelioma (MPM). Materials and Methods: The study included 60 patients with MPM who were diagnosed and treated in the Radiation Oncology Department of Kayseri Teaching Hospital and Medical Oncology Department of Erciyes University, Medicine School between 2005 and 2013. By using immunohistochemical methods, ERCC1 expression in biopsy specimens was evaluated. We retrospectively assessed whether there is a correlation between ERCC1 and response to anti-neoplastic therapy or survival. Results: There were 50 men and 10 women with median age of 62 years (range: 39-83). Histological type was epithelial mesothelioma in the majority of the cases (85%), most commonly presenting in stage four. Of the cases, 20 (33%) received radiotherapy, 60 (%100) received first-line chemotherapy and 15 (%25) received second-line chemotherapy. In the assessment after therapy, it was found that there was partial response in 12 cases (20%), stable disease in 19 cases (31.4%) and progression in 25 cases (41.7%). ERCC1 was positive in 43% of the cases. Mean OS was 11.7 months and mean DFS was 9.5 months in ERCC1-positive cases regardless of therapy, while they were 19.2 months and 17.1 months in ERCC1-negative cases, respectively. The difference was found to be significant (p<0.05). In univariate analysis, stage, comorbidity, response to treatment and ERCC1 expression were found to be significantly associated with OS (p=0.083; p=0.043; p=0.041; p=0.050). In multivariate analysis, response to treatment remained to be significant for OS (p=0.005). In univariate and multivariate analyses, response to treatment and ERCC1 were found to be significantly associated with DFS (p=0.049; p=0.041). Conclusions: ERCC1 was identified as poor prognostic factor in patients with MPM.

Videoendoscopic sentinel lymph node detection with icg and bilateral inguinofemoral lymphadenectomy in vulvar cancer comba-ozdemir technique

( Cihan Comba ),( Sakir Volkan Erdogan ),( Aliye Erdogan ),( Aysenur Bagdatli ),( Busra Seker Atas ),( Omer Demir ),( Isa Aykut Ozdemir ) 대한산부인과학회 2021 Obstetrics & Gynecology Science Vol.64 No.6

Objective The authors present a surgical film for vulvar cancer surgery, which was performed via video endoscopy. Methods An 88-yearold woman with squamous cell carcinoma of the vulva and who underwent radical vulvectomy was treated with sentinel lymph node (SLN) and bilateral inguinofemoral lymphadenectomy, which is preferably performed via video endoscopic surgery with a near-infrared fluorescence video endoscopy system. SLN mapping was performed using indocyanine green and near-infrared fluorescence mapping. Results SLNs were detected in the left superficial inguinal area. The surgeons performed bilateral inguinofemoral lymphadenectomy. Conclusion No postoperative early or late complications developed, and the patient was discharged 7 days after surgery. Stage 1B vulvar cancer was identified.

Relationships between Skin Cancers and Blood Groups - Link between Non-melanomas and ABO/Rh Factors

Cihan, Yasemin Benderli,Baykan, Halit,Kavuncuoglu, Erhan,Mutlu, Hasan,Kucukoglu, Mehmet Burhan,Ozyurt, Kemal,Oguz, Arzu Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.7

Background: This investigation focused on possible relationships between skin cancers and ABO/Rh blood groups. Materials and Methods: Between January 2005 and December 2012, medical data of 255 patients with skin cancers who were admitted to Kayseri Training and Research Hospital, Radiation Oncology and Plastic Surgery Outpatient Clinics were retrospectively analyzed. Blood groups of these patients were recorded. The control group consisted of 25701 healthy volunteers who were admitted to Kayseri Training and Research Hospital, Blood Donation Center between January 2010 and December 2011. The distribution of the blood groups of the patients with skin cancers was compared to the distribution of ABO/Rh blood groups of healthy controls. The association of the histopathological subtypes of skin cancer with the blood groups was also investigated. Results: Of the patients, 50.2% had A type, 26.3% had O type, 16.1% had B type, and 7.5% had AB blood group with a positive Rh (+) in 77.3%. Of the controls, 44.3% had A type, 31.5% had 0 type, 16.1% had B type, and 8.1% had AB blood group with a positive Rh (+) in 87.8%. There was a statistically significant difference in the distribution of blood groups and Rh factors (A Rh (-) and 0 Rh positive) between the patients and controls. A total of 36.8% and 20.4% of the patients with basal cell carcinoma (BCC) had A Rh (+) and B Rh (+), respectively, while 39.2% and 27.6% of the controls had A Rh (+) and B Rh (+), respectively. A significant relationship was observed between the patients with BCC and controls in terms of A Rh (-) (p=0.001). Conclusion: Our study results demonstrated that there is a significant relationship between non-melanoma skin cancer and ABO/Rh factors.