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SOME SUMMABLE SEQUENCE SPACES DEFINED BY THE WEIGHTED MEAN METHOD AND MODULUS FUNCTIONS
SELMA ALTUNDAG,HEMEN DUTTA 장전수학회 2018 Proceedings of the Jangjeon mathematical society Vol.21 No.2
In this paper, we define the concept of [ N⁻λ, pn, f ] ─ summability, and give the relation between [ N⁻λ, pn] ─ summability and [ N⁻λ, pn, f ] ─ summability. We also study some connections between weighted statistically λ ─ convergence (or SN⁻λ ─ convergence) and [N⁻λ, pn, f ] ─ summability.
Esra Durduran,Huseyin Altundag,Mustafa Imamoglu,Salih Zeki Yıldız,Mustafa Tuzen 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.27 No.-
Silica gel was functionalized with N-(2-aminoethyl)-2,3-dihydroxybenzaldimine group (AEDHB-SG) andcharacterized by elemental analysis and FT-IR spectroscopy. Preconcentration conditions of Cd(II), Cu(II),Ni(II) and Pb(II) were investigated on the AEDHB-SG loaded column using a solid phase extractiontechnique. The effects of parameters such as the pH, sample volume, flow rates, matrix ions wereexamined. Adsorption capacity of AEDHB-SG for Cd(II), Cu(II), Ni(II) and Pb(II) was 0.40, 0.56, 0.50 and0.23 mmol g 1. The accuracy of the developed method was confirmed by certified reference materials. Optimized method was applied to water and food samples for the determination of trace metals usingICP-OES.
터키 내 한국기업과 한국어학습자의 요구분석 -대학 내 한국어교육과정 설계와 개선을 위하여-
조은숙 ( Eun Suk Cho ),프나르알툰다으 ( Pinar Altundag ) 연세대학교 언어정보연구원(구 연세대학교 언어정보개발원) 2013 언어사실과 관점 Vol.32 No.-
This study aims to improve and rearrange the curriculum of the programs in Turkey which offer Korean education. Surveys relating to the requirements of a satisfying Korean education have been conducted with Korean companies and Korean learners. Results show without doubt that students have clear and well defined motivations for studying Korean and that the number of students studying Korean language is rapidly increasing. Furthermore the students, the study shows, point out that they can benefit from lectures covering various topics related to Korean studies. The original contribution of this study is its new approach to the course content which takes into consideration the Turkish-Korean partnership (relations) and students` intentions as well as their motivation to study Korean culture Language. A further conclusion of the study is that introducing the Turkish students to Korean culture will improve the mutual understanding between the Turkish and Korean students and help them develop empathy to have successful communication with an understanding of the Korean life practices. It is recognized that curriculum and education relies on social needs and must be developed and implemented individually for the unique context of each society. Besides, Korean studies in Turkey have been much more effective and widespread in the last decade. However, education policy of the country must be revised and reinforced thoroughly if we aim to make it meet the growing demands of the both countries and facilitate further improvement of Korean studies.
Impact of Treatment Strategies on Local Control and Survival in Uterine Carcinosarcomas in Turkey
Kucukoztas, Nadire,Dizdar, Omer,Rahatli, Samed,Dursun, Polat,Yalcin, Selim,Altundag, Ozden,Ozen, Ozlem,Reyhan, Nihan Haberal,Tarhan, Cagla,Yildiz, Ferah,Ayhan, Ali Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.5
Background: The purpose of this study was to determine the clinical characteristics, patterns of recurrence and survival outcomes in patients with uterine carcinosarcomas treated in our institution. Materials and Methods: Records of 26 patients diagnosed between 2007 and 2011 with uterine carcinosarcoma were retrospectively evaluated for demographic features, tumor characteristics, treatment regimens and patient outcomes in terms of DFS and OS Results: Median age was 61 (range 43-78). 10 patients (38%) had stage I disease at diagnosis, 3 (12%) had stage II, 4 (15%) had stage III and 9 (35%) had stage IV. Sixteen patients (62%) received chemotherapy with paclitaxel and carboplatin for 6 cycles. One patient underwent radiotherapy. Median follow up was 17 months. Sixteen patients relapsed and 13 died during follow up. Considering recurrence, 5 out of 16 patients had lung metastases, one had brain metastases and 9 had only intraabdominal recurrence. The 3 year DFS was 37% and the 3 year OS was 30%. Conclusions: Our data show that uterine carcinosarcomas tend to be at advanced stage at diagnosis and despite the use of chemotherapy, overall prognosis is poor. Surgery remains the mainstay of treatment. More effective adjuvant strategies are needed to reduce relapse and death rates.
What is the Mechanism of Progression with Trastuzumab Treatment - Escape or Resistance?
Sendur, Mehmet Ali Nahit,Aksoy, Sercan,Ozdemir, Nuriye Yildirim,Zengin, Nurullah,Altundag, Kadri Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.11
Human epidermal growth factor receptor (HER) 2 overexpression, observed in 20-25 percent of invasive breast cancers, is well known to be associated with a more aggressive phenotype and poor prognosis, with resistance to certain chemotherapeutic agents. The majority of patients with metastatic breast cancer who initially respond to trastuzumab, demonstrate disease progression within 1 year of treatment initiation. Furthermore, lack of response in some patients and relapse during the course of therapy, continue to challenge researchers and clinicians. A better understanding of the fundamental mechanisms of trastuzumab action is required so that new therapies directed at HER2 can be developed. We present here findings for mechanisms, both of Trastuzumab action and clinical resistance or escape.
Ifosfamide and Doxorubicin Combination Chemotherapy for Recurrent Nasopharyngeal Carcinoma Patients
Dede, Didem Sener,Aksoy, Sercan,Cengiz, Mustafa,Gullu, Ibrahim,Altundag, Kadri Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.5
Background: We assessed the efficacy and toxicity of ifosfamide and doxorubicin combination chemotherapy (CT) regimen retrospectively in Turkish patients with recurrent or metastatic nasopharyngeal carcinoma (NPC) previously treated with platinum-based chemotherapy. Methods: A total of thirty patients who had received cisplatin based chemotherapy/chemoradiotherapy as a primary treatment received ifosfamide 2500 $mg/m^2$ days 1-3, mesna 2500 $mg/m^2$ days 1-3, doxorubicin 60 mg/m2 day 1 (IMA), repeated every 21 days. Eligible patients had ECOG PS< 2, measurable recurrent or metastatic disease, with adequate renal, hepatic and hematologic functions. Results: Median age was 47 (min-max; 17-60). Twenty six (86.7 %) were male. Median cycles of chemotherapy for each patient were 2 (range:1-6). Twenty patients were evaluable for toxicity and response. No patient achieved complete response, with nine partial responses for a response rate of 30.0% in evaluable patients. Stable disease, and disease progression were observed in five (16.7%) and six (20.0%) patients, respectively. Clinical benefit was 46.7%. Median time to progression was 4.0 months. Six patients had neutropenic fever after IMA regimen and there were one treatment-related death due to tumor lysis syndrome in first cycle of the CT. No cardiotoxicity was observed after CT and treatments were generally well tolerated. Conclusion: Ifosfomide and doxorubicin combination is an effective regimen for patients with recurrent and metastatic NPC. For NPC patients demonstrating failure of cisplatin based regimens, this CT combination may be considered as salvage therapy.