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QUANTUM CODES FROM CYCLIC CODES OVER F<sub>4</sub> + vF<sub>4</sub>
OZEN, MEHMET,ERTUNC, FAIK CEM,INCE, HALIT The Korean Society for Computational and Applied M 2016 Journal of applied mathematics & informatics Vol.34 No.5
In this work, a method is given to construct quantum codes from cyclic codes over F<sub>4</sub> + vF<sub>4</sub> which will be denoted as R throughout the paper, where v<sup>2</sup> = v and a Gray map is defined between R and where F<sub>4</sub> is the field with 4 elements. Some optimal quantum code parameters and others will be presented at the end of the paper.
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Quantum Codes from Cyclic Codes over $F_4 + vF_4$
Mehmet Ozen,Faik Cem Ertunc,Halit Ince 한국전산응용수학회 2016 Journal of applied mathematics & informatics Vol.34 No.5
In this work, a method is given to construct quantum codes from cyclic codes over $ F_4 + vF_4$ which will be denoted as $R$ throughout the paper, where $v^2 = v$ and a Gray map is defined between $R$ and $F_4^2$, where $F_4$ is the field with $4$ elements. Some optimal quantum code parameters and others will be presented at the end of the paper.
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Bulent Akay,Suna Ertunc,Havva Boyacioglu,Hale Hapoglu,Mustafa Alpbaz 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.3
This work presents the applications of discrete-time system identification and generalized minimum variance (GMV) control of dissolved oxygen (DO) level in a batch bioreactor in which Saccharomyces cerevisiae is produced at aerobic condition. Air flow rate and mixing rate were varied to determine the maximum local liquid phase volumetric mass transfer coefficient (K_La). Maximum K_La value was determined at a mixing rate of 600 rpm and air flow rate of 3.4 Lmin^(−1). For control purpose, manipulated variable was selected as air flow rate due to its effectiveness on the K_La. To examine the dynamic behavior of the bioreactor, various input signals were utilized as a forcing function and three different model orders were tested. A second0order controlled auto regressive moving average (CARMA) model was used as the process model in the control algorithm and in the system identification step. It is concluded that the ternary input is more suitable than the other input types used in this work for system identification. Recursive least squares method (RLS) was used to determine the model parameters. GMV control results were compared with the traditional PID control results by using performance criteria of IAE and ITAE for different types of DO set point trajectories. DO concentration in the batch bioreactor was controlled more successfully with an adaptive controller structure of GMV than the PID controller with fixed parameters.
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Dolen, Utku Can,Sungur, Nezih,Koca, Gokhan,Ertunc, Onur,Bosi, Ayse Tulay Bagci,Kocer, Ugur,Korkmaz, Meliha Korean Society of Plastic and Reconstructive Surge 2015 Archives of Plastic Surgery Vol.42 No.6
Background It is still difficult to prevent partial or full-thickness flap necrosis. In this study, the effects of a cream containing menthol and methyl salicylate on the viability of random-pattern skin flaps were studied. Methods Forty female Sprague-Dawley rats were divided into two equal groups. Caudally based dorsal random-pattern skin flaps were elevated, including the panniculus carnosus. In the study group, 1.5 mL of a cream containing menthol and methyl salicylate was applied to the skin of the flap, and saline solution (0.9%) was used in the control group. Upon completion of the experiment, flap necrosis was analyzed with imaging software and radionuclide scintigraphy. Histopathological measurements were made of the percentage of viable flaps, the number of vessels, and the width of the panniculus carnosus muscle. Results According to the photographic analysis, the mean viable flap surface area in the study group was larger than that in the control group (P=0.004). According to the scintigrams, no change in radioactivity uptake was seen in the study group (P>0.05). However, a significant decrease was observed in the control group (P=0.006). No statistically significant differences were observed between the groups in terms of the percentage of viable flaps, the number of vessels, or the width of the panniculus carnosus muscle (P>0.05). Conclusions Based on these results, it is certain that the cream did not reduce the viability of the flaps. Due to its vasodilatory effect, it can be used as a component of the dressing in reconstructive operations where skin perfusion is compromised.
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Routine calcitonin measurement in nodular thyroid disease management: is it worthwhile?
Yigit Turk,Ozer Makay,Murat Ozdemir,Gozde Ertunc,Batuhan Demir,Gokhan Icoz,Mahir Akyildiz,Mustafa Yilmaz 대한외과학회 2017 Annals of Surgical Treatment and Research(ASRT) Vol.92 No.4
Purpose: To evaluate the diagnostic accuracy of routine calcitonin measurement in patients with nodular thyroid disease. Methods: Consecutive patients with nodular thyroid disease (n = 640) were studied. Serum calcitonin levels were measured under basal conditions, and when basal values were between 10–100 pg/mL, testing was repeated after pentagastrin (PG) stimulation. Patients with previously diagnosed or familial medullary thyroid cancer (MTC) were excluded. Patients were operated on when basal or stimulated calcitonin >100 pg/mL or when other surgical indications were present. Results: Four cases of MTC were identified. MTC was diagnosed in 75% of patients with basal calcitonin >100 pg/mL. One out of 11 patients with basal calcitonin between 10–100 pg/mL was diagnosed with MTC. PG stimulation resulted in elevation in 4 cases, where 1 case was diagnosed with MTC. Positive predictive value for basal calcitonin levels in the preoperative diagnosis of MTC was 5% for values between 10–100 pg/mL and 100% for values >100 pg/mL. Possible reasons for false positivity were papillary thyroid cancer in 17%, renal insufficiency in 8.3%, Hashimoto thyroiditis in 17% and β-blocker use in 33%. Positive predictive value for the PG test (>100 pg/mL) was 25% in the entire series. The cost of adding calcitonin measurement (±PG stimulation) to the preoperative work-up, resulted in €912.68 per MTC patient to detect the disease. Conclusion: Basal calcitonin measurement together with PG stimulation in cases of basal calcitonin >10 pg/mL detects MTC in 0.62% of patients with nodular thyroid disease.
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