Browsing by Author "Koc, B."

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General Situation of Beekeeping in the Eastern Anatolian Region of Turkey and Arima Model With the Help of Long-Term Analysis
(Academic Journals inc, 2010) Koc, B.; Terin, M.; Ceylan, M.; Dagistan, E.
With this study, the overall situation of beekeeping in Eastern and possible future cases in light of the available data reveals, the problem of identifying and developing some proposals aimed. This study presents a study of the current status (During the 1991-2005 period) and 15-year trend of beekeeping in the Eastern Anatolian Region of Turkey. Study has indicated the current situation of beekeeping. At this stage, a simple proportional tables, simple index, chain index and an average annual growth rate of such analysis is used. The long-term trend analysis for the prediction of the future, the ARIMA Model Used. The 17.05% of total honey production of Turkey is produced in this region and it contains 18.33% of the total bee hives. There are a total of 4.027 villages and 841.000 beehives in the Eastern Anatolian Region producing 14.116 tons honey. Honey production per bee hive is close to the Turkish average (16.7 kg). In the 1991-2005 period, the annual average increase in the number of hives number was -2.43%; honey production decreased by -1.86% and wax production was reduced by -0.94%. According to ARMA analysis, the honey production in 2005 of 14 thousand tons, 14.6 thousand tons in 2020 would be approximately estimated. In the long term trend analysis, it was found that if honey production continues with the current techniques and information level of the farmers, no development will be achieved in honey and wax production in the long term.
Identifying Technical Efficiency of Dairy Cattle Management in Rural Areas Through a Non-Parametric Method: a Case Study for the East Mediterranean in Turkey
(2009) Dagistan, E.; Koc, B.; Gul, M.; Parlakay, O.; Goksel Akpinar, M.
There are many aspects regarding the success of dairy cattle management and productivity. In this study, amount and kinds of feed, costs of veterinary consultancy, herd size, labor and capital were utilized to estimate technical efficiency of dairy cattle management in small scale farms in the east Mediterranean region of Turkey. A non-parametric efficiency analysis was used for the data obtained through face-to-face interviews in 100 small scale farms. We used tobit regression analysis to determine the effectiveness of possible factors affecting production performances of the farms. The results suggested that the average technical efficiency is unsatisfactory since Constant Returns to Scale (CRS) and Variable Returns to Scale (VRS) values are relatively <1 (0.59 and 0.83, respectively). Only 13 and 46% of the farms were found to be efficient in terms of CRS and VRS, respectively. Data Envelopment Analysis (DEA) showed that the farms had excess input usage ranging from 10-22%. To increase efficiency scores in subsidiary profit farms in semi-arid east Mediterranean conditions, farmers should adopt new methodologies, which decrease the costs and excess input usage in such semi-pasture management systems. © Medwell Journals, 2009.
Is Hashimoto's Thyroiditis a Prognostic Factor for Thyroid Papillary Microcarcinoma
(verduci Publisher, 2014) Bircan, H. Y.; Koc, B.; Akarsu, C.; Demiralay, E.; Demirag, A.; Adas, M.; Kemik, O.
AIM: The relationship between papillary thyroid carcinoma (PTC) and accompanying Hashimoto's thyroiditis (HT) has been investigated extensively. However, there is no agreement among the authors. We aimed with this study to investigate this relationship in a limited subtype of PTC called papillary thyroid microcarcinoma (PTMC). PATIENTS AND METHODS: Between January 1999 and December 2012, 1923 thyroids were surgically resected in two referral centers and thoroughly inspected for evidence of PTMC. Of these patients, 172 who were diagnosed with PTMC had demographic and pathological features recorded. RESULTS: Fourteen patients (8.1%) were found to have CLN metastases. Eleven (78.6%) of the patients with CLN metastases had tumors larger than 5 mm, and 3 (21.4%) patients with CLN metastases had small tumors (<= 5 mm), but there was no statistical significance (p > 0.05). Accompanying Hashimoto's thyroiditis (HT) was detected in 67 (39%) patients. The CLN metastasis rate was slightly higher in cases with HT in surrounding thyroid tissue. However, there was no statistical significance; the CLN rate was 6.7% (n=7) in patients without thyroiditis and 10.4% (n=7) with Hashimoto's thyroiditis. Insufficient FNA results in patients with thyroiditis were associated with HT (p < 0.05). CONCLUSIONS: Surgeons and other clinicians who play a role in the treatment of thyroid cancers should be aware that some PTMC cases may show a worse course, as with some PTCs, contrary to expectations.
Ligasure® Versus Clamp Tie Technique for Thyroid Surgery; Decreased Operative Time Versus Increased Inflammatory Effect: a Prospective Randomized Study
(verduci Publisher, 2014) Bircan, H. Y.; Inal, A.; Ozcelik, U.; Koc, B.; Demirag, A.; Moray, G.; Kemik, O.
OBJECTIVE: The aim of this study was to compare the LigaSure (R) Small Jaw Instrument (LSJI) with the conventional clamp-and-tie (CT) technique in thyroid surgery regarding complication rates (hematoma, hypocalcemia and recurrent nerve palsy), the duration of the operative procedure, and systemic and local inflammatory effects. PATIENTS AND METHODS: Fifty-four consecutive patients were randomized prospectively into two groups, a Conventional Clamp-Tie (CT) group and a LigaSure (R) Vessel Sealing System (LVSS) Group. Pre- and postoperative blood plasma samples were taken to measure the tumor necrosis factor alpha (TNF-alpha), interleukin-6 (IL-6), calcium, parathormon, CRP levels and WBC, as well as the lymphocyte subset (CD3, CD4, CD8, CD16/56, CD19) counts. The drain fluid samples were collected after the removal of the drains to measure the levels of IL-6 and TNF-alpha. RESULTS: Both groups showed significant changes regarding peripheral blood CD3+, CD4+, and CD8+ T cell levels (p < 0.05). In the LVSS group, the level of CD16+56+ NK cells showed a significant decrease compared with the CT group (p < 0.05). The IL-6 and TNF-alpha levels in the drainage fluid were significantly higher in the LVSS group. CONCLUSIONS: We demonstrated that LSJI can decrease operative time. Although the systemic inflammatory effect of LSJI remains inconclusive, the local inflammatory effect was significant, which could cause early and late postoperative problems.
Unpredictable Behavior of Breast Phyllodes Tumors
(verduci Publisher, 2014) Akcakaya, A.; Koc, B.; Erozgen, F.; Memmi, N.; Hot, S.; Yildiz, M. K.; Kemik, O.
OBJECTIVE: Phyllodes Tumor is a rare fibroepithelial breast tumor with variable malignant potential. These tumors that currently accepted nomenclature are benign, borderline and malignant according to the World Health Organization. It tends to behave in a benign way but it may undergo a malignant transformation. The purpose of this study was to present our Case load of phyllodes tumor, and evaluate the management and follow-up the behavior of these tumors. PATIENTS AND METHODS: 36 patients with phyllodes tumor were treated in Bezmialem Vakif University and Okmeydani Training and Research Hospitals analyzed retrospectively. Demographics, presenting symptoms, history, local examination, preoperative clinical diagnosis, treatment, postoperative histopatology, follow-up period were evaluated retrospectively and studied. RESULTS: A total of 36 patients treated for phyllodes tumor were analyzed. Mean age of the patients was 38 (14-79) and all were females. The presentation of the patients was breast lump in all cases, either as a primary or recurrent lump presentation. The right and left breast were affected 58% and 42% respectively. 34 of these 36 cases are briefly mentioned in this paper but the two cases, one with sarcomatous malignant transformation and the other with fatal metastatic phyllodes tumor in an adolescent female are discussed in detail. The mean duration of the symptomatic mass was 9.8 +/- 7.3 months (range 0.5 to 24). CONCLUSIONS: Phyllodes tumor is a type of tumor that may be benign or malignant. The type with malignant features may be fatal. The tumors diagnosed as benign may transform and become malignant because of unknown reasons and may be an aggressive tumor.