SEYİTÖMER TERMİK SANTRALININ KURUMA ALANLARINDAKİ KARAÇAM (Pinus nigra Arnold.) YILLIK HALKALARINA ETKİSİNİN ARAŞTIRILMASI

Bu çalışmada, Seyitömer Termik Santralının kurumuş olan ormanlardaki karaçam ağaçlarının yıllık halka gelişimine yaptığı etkiler incelenmiştir. Yıllık halka genişliklerinin incelenmesinde termik santral birimlerinin işletmeye açıldığı tarihler esas alınmıştır. Bunlar I. dönem 1957-1972 (termik santral öncesi), II. dönem 1973-1989 (termik santralın dört biriminin sırasıyla kurulduğu dönem) ve III. dönem 1990-2001 (termik santralın tüm birimleri ile çalıştığı dönem) yılları arasıdır. Yıllık halkalar ile iklim verileri değerlendirmeleri bu üç dönemde ilişkilendirilmiştir. Bu analiz sonuçlarına göre; İklim ögelerinden yağış ve sıcaklığın ortalama aylık değerleri üç dönemde de hemen hemen aynıdır. Buna karşılık, üç dönemdeki yıllık halka genişliklerinin ortalama değerleri ile yıllık halka genişliklerinin aylık ortalama yağış ve sıcaklıkla olan ilişkileri farklı bulunmuştur. Anahtar Kelimeler: Seyitömer termik santralı, Kuruma, Yıllık Halka, Karaça

Determination of a monumental Quercus coccifera tree in Gökçeada

Ağaç-insan ilişkisinde önemli bir yere sahip olan anıt ağaçlar, ağaca duyulan hayranlık ve sevginin önemli simgelerindendir. Quercus coccifera L. (dikenli pırnal, kermes meşesi) gibi genellikle çalı formundaki bireylerle temsil edilen ağaçlar içerisinde ileri çap ve boylara ulaşmış olanlar son derece nadirdir. Türkiye’de bugüne kadar 9 anıt ağaç önerisi yapılan dikenli pırnal ağacının anıtsal boyutlara ulaşmış bir bireyi de Gökçeada’da bulunmuştur. Makalenin amacı bu ağacın anıtsal değerini saptayarak anıt ağaç olarak tescil edilmesi için bilimsel altlık oluşturmaktır. Gövde çapı (1.30 m’deki) 106 cm ve boyu da 12,5 m olan söz konusu dikenli pırnal ağacının ŞAD (Şimdiki Anıtsal Değeri) > MADtür değeri (Minimum Anıtsal Değeri) 69 > 44 olarak belirlenmiştir. Arazide bir şapelin yanında bulunan ağaç, bu dini tesisin bir parçası konumundadır. O nedenle, hem boyutsal hem de folklorik yönüyle anıt ağaç olarak tescil edilmesi uygun olacaktır.Monumental trees, which have an important place in the tree-human relationship, are important symbols of admiration and love for the tree. Trees such as Quercus coccifera L. (Kermes oak), which are generally represented by individuals in the form of bushes, are extremely rare. In Turkey, an individual has reached monumental dimensions of the nine so far detected Kermes oak tree was also found in Gökçeada. The purpose of the paper is to establish a scientific base for the monumental value of this tree to be registered as a monumental tree. The Kermes oak tree, whose trunk diameter (at 1.30 m) is 106 cm and its length is 12,5 m, has been determined as ŞAD (Current Monumental Value)> Item Value (Minimum Monumental Value) 69> 44. This tree with a chapel in the field is part of this religious facility. Therefore, it would be appropriate to register it as a monumental tree in terms of both dimensional and folkloric aspects

Calculation of shielding effectiveness and specific absorption rate via Transmission Line Matrix method

İletim Hattı Matrisi (İHM) yöntemi günümüzde sıkça kullanılmaya başlanan zaman-domeni tekniklerden birisidir. Bu çalışmada, söz konusu teknik öncelikle analitik çözümleri mevcut olan problemlere uygulanarak kalibre edilmiş ve geçerliliği gösterilmiş, analitik çözümün henüz mevcut olmadığı problemlerde ise diğer bir zaman-domeni yöntemi olan Zamanda Sonlu Farklar (ZSF) yöntemi ile karşılaştırılmıştır. Ele alınan iki önemli problem, ekranlama etkinliği (EE) ve özgül soğurma oranı (ÖSO)’dır. Bu problemlerin ortaya çıktığı yapıların modellenmeleri hayli karmaşık ve zor olduğu gibi bu büyüklüklerin deneysel olarak belirlenmesi de çoğu kez olanaksızdır. Bu nedenle her iki problemin çözümünde de sayısal yöntemler en yaygın ve etkili yaklaşımı oluşturmaktadır.Anahtar Kelimeler: İletim hatları, İHM yöntemi, ZSF yöntemi, ekranlama etkinliği, özgül soğurma oranı.Transmission Line Matrix (TLM) method is a very effective time-domain method, which has been extensively used in the past two decades for solving various electromagnetic (EM) problems. This method is not only used in the solution of EM problems but also in that of different types of problems such as diffusion and viscosity in the literature because of its nature. In this work, TLM is applied for determining solutions of two complex EM problems which have not been addressed via TLM. These two problems are the calculation of shielding effectiveness (SE) and specific absorption rate (SAR), which are very important in the daily life. These two areas present difficult modeling and simulation problems which may require excessive computer resources. However, since the determination of SE and particularly of SAR experimentally via measurements is often not possible numerical techniques play a dominant role in such applications. Analytical verification of the results have also been performed by comparing Green?s function solution of a PEC resonator with TLM results. And also radiation from an aperture is used for the same purpose in this study. Very satisfactory results are obtained via these validations. These results have shown that TLM method can safely been applied for solving two complex problems which are calculation of SE and SAR..Keywords: Transmission lines, TLM method, FDTD method, shielding effectiveness, specific absorption rate

Research Tendencies in the Discipline of Distance Education (2015-2022): Examination of Doctoral Theses in Higher Education in Turkey

The discipline of distance education is evolving and becoming mainstream, and this view requires examining research tendencies in the field. Motivated by this justification, it can be argued that understanding distance education to the fullest extent is possible partially through examining changes in theory and practice, as research conducted in the field reflects changes, dynamics, and perspectives. In this regard, the purpose of this paper is to present the research tendencies in doctoral theses in the Turkish higher education context with a specific focus on distance education. In line with this aim, a total of 265 doctoral theses published between 2015 and 2022 were examined through data mining and analytics approaches. The analysis of the titles through t-SNE analysis revealed four broad themes. These are: (1) more emphasis on learning processes; (2) the comparison of online technologies and online learning spaces; (3) a strong focus on educational technologies; and (4) the limitations emerging from comparative studies. The examination of the abstracts through text-mining identified the following themes: (1) the methodological vicious circle, the pursuit of methodological perfection, and lack of critical perspectives; (2) the tendency to use online [educational] technologies; (3) the comparison of distance and face-to-face education; and (4) the design of social interaction and communication in distance education processes. Finally, the analysis of the keywords through word clouds surfaced the following research tendencies: (1) Technology-supported distance education processes; (2) the wide use of educational technologies; (3) focusing on issues related to the learners in distance education. The paper concludes with implications and recommendations for future research directions

Polatuzumab vedotin, rituximab, and bendamustine combination in relapsed or refractory diffuse large B-cell lymphoma: A real-world data from Turkey

Polatuzumab vedotin (Pola) with bendamustine and rituximab (BR) is a promising option for patients with relapsed/refractory (R/R) diffuse large B-cell lymphoma (DLBCL). We analyzed the data of 71 R/R DLBCL patients who had been treated with Pola-BR in the named patient program from March 2018 to April 2021 from 32 centers in Turkey. All patients received up to six cycles of Pola 1.8 mg/kg, rituximab 375 mg/m2 on day 1, and bendamustine 90 mg/m2 on days 1–2 of each cycle. Median age at Pola-BR initiation was 55 (19–84). The overall response rate was 47.9%, including 32.4% CR rate when a median of 3 cycles was applied. With a median follow-up of 5 months, the median OS was 5 months. Grade 3–4 neutropenia and thrombocytopenia were the most common hematological toxicities. The real-world data from our cohort showed the Pola-BR is an effective option with a manageable toxicity profile

Rapidly progressive glomerulonephritis in a child with Henoch-Schönlein Vasculitis and familial Mediterranean fever

Henoch-Schonlein Vasculitis (HSV) is systemic small vessel vasculitis involving the skin, kidney, joints, and gastrointestinal tract. The proportion of patients reported to have renal involvement varies between 20% and 80%. Rapidly progressive glomerulonephritis (RPGN)is rare syndrome in children, characterized by clinical features of glomerulonephritis (GN) and rapid loss of renal function. We present a severe kidney involvement in a 14 year old boy with HSV in who is carring MEFV mutation. A 14 year old boy had developed sudden onset of palpable purpuric rash on his extensor surfaces of lower extremities. He had elevated an erythrocyte sedimentation rate (ESR) (45 mm/h), C-reactive protein (3.74 mg/dl), serum urea 66 mg/dl, serum creatinine 1.8 mg/dl. Also, he had hypocomplementemia. Antinuclear antibody, anti ds DNA, antineutrophil cytoplasmic antibody, anticardiolipine antibodies were negative. Urinalysis revealed macroscopic hematuria and proteinuria with a 24-h urinary protein excretion of 55 mg/m2/h. The renal biopsy specimen showed crescentic and necrotizing glomerulonephritis. He had also M694V/E148Q compound heterozygote mutation. Clinical symptoms and renal failure resolved with intermittant hemodialysis and medical therapy

Expanding the clinical and immunological phenotypes of PAX1-deficient SCID and CID patients

Paired box 1 (PAX1) deficiency has been reported in a small number of patients diagnosed with otofaciocervical syndrome type 2 (OFCS2). We described six new patients who demonstrated variable clinical penetrance. Reduced transcriptional activity of pathogenic variants confirmed partial or complete PAX1 deficiency. Thymic aplasia and hypoplasia were associated with impaired T cell immunity. Corrective treatment was required in 4/6 patients. Hematopoietic stem cell transplantation resulted in poor immune reconstitution with absent naïve T cells, contrasting with the superior recovery of T cell immunity after thymus transplantation. Normal ex vivo differentiation of PAX1-deficient CD34+ cells into mature T cells demonstrated the absence of a hematopoietic cell-intrinsic defect. New overlapping features with DiGeorge syndrome included primary hypoparathyroidism (n = 5) and congenital heart defects (n = 2), in line with PAX1 expression during early embryogenesis. Our results highlight new features of PAX1 deficiency, which are relevant to improving early diagnosis and identifying patients requiring corrective treatment

Periodical Name Changes in the Higher Education Forestry Institutions of Turkey

Forestry higher education has been offered since 1857. This study investigates the alterations made in the tertiary forestry institution names in Turkey under three periods: (1) between the years 1857 and 1934, (2) between the years 1945 and 1948, and (3) between the years 2006 and 2018. The Faculty of Forestry was under the Ministry of Mining during the first period, which later became a unit under the Ministry of Agriculture. In 1934, during the Republican period, it became a subdivision of Ankara Yuksek Ziraat Enstitusu (Ankara Institute of Advanced Agriculture, YZE). All those changes in this period improved the reputation of the institution and the occupation. In the second period, tertiary-level forestry education was separated from YZE and incorporated into Istanbul University. The faculty members and the councils of the Faculty of Forestry were directly involved in the decision-making processes required by this change. However, the third period is marked by regulations that were made without involving any forestry education institutions and professionals. Due to the lack of a clear higher education policy, the names of institutions have not been preserved and the formation of an academic tradition in the forestry institutions has been delayed