41 research outputs found
Characterizing a highly accomplished teacher’s noticing of third-grade students’ mathematical thinking
No full textThis study investigated a highly accomplished third-grade teacher’s noticing of students’ mathematical thinking as she taught multiplication and division. Through an innovative method, which allowed for documenting in-the-moment teacher noticing, the author was able to explore teacher noticing and reflective practices in the context of classroom teaching as opposed to professional development environments. Noticing was conceptualized as both attending to different elements of classroom instruction and making sense of classroom events. The teacher paid most attention to student thinking and was able to offer a variety of rich interpretations of student thinking which were presented in an emergent framework. The results also indicated how the teacher’s noticing might influence her instructional decisions. Implications for both research methods in studying noticing and teacher learning and practices are discussed.WOS:0004000764000042-s2.0-84944698927Social Sciences Citation IndexArticleUluslararası işbirliği ile yapılmayan - HAYIRHaziranYÖK - 2016-1
Yeni Öğretmenlerin Öğrenci Düşüncelerine Gösterdiği Dikkat
No full textRukiye Didem Taylan (MEF Author)Bu makale üçüncü-sınıf öğretmenlerinin öğrencilerin matematiksel düşüncelerini fark etmeleri ile ilgili çoklu durum çalışmasından kesitler sunmaktadır. Bu makalede mesleğe yeni başlamış olan iki sınıf öğretmeninin öğrencilerin matematiksel düşüncelerini fark etme becerilerini kulaklarına takılı taşınabilir kamera aracılığıyla seçtikleri kayıtlar yoluyla inceledim. Derslerden sonra öğretmenlerle yaptığım röportajlar sırasında öğretmenlerin video klipleri neden çektiklerine dair verdikleri bilgiler onların değişik olayları fark ettiğine dair kanıt sundu. çalışmadaki iki öğretmenin de ders sırasında en çok ilgi gösterdiği olaylar öğrencilerin matematiksel düşünmeleri ile ilgiliydi. Bulgular hem öğretmenlerin dikkatini inceleme konusunda geliştirilen araştırma metotları konusunda hem de yeni başlayan öğretmenlerin dikkat becerileri konusunda çıkarımlar içermektedi
A study on the magnetite skarn mineralization (Gümüşhane, Türkiye): a magnetic survey
No full textIron (Fe)-skarn mineralizations (Çambaşı, Dereli, Eğrikar, Karadağ, Kopuz, Sekü, Donguldere, Arnastal, Özdil, Ögene, İkizdere, Ovit Dağı, Kartiba, etc.) in the eastern part of the Pontides (NE Türkiye) are accommodated in the Pontide paleomagmatic arc and the eastern part of the Pontides Metallogenic Belt containing numerous various deposits. Fe-skarn mineralization around the Arnastal Plateau (Gümüşhane-Türkiye) is fragmentary in this area, which is covered with plants (grasses, flowers, etc.). Thus, it was attempted to describe the subsurface structures and Fe mineralization using an interpretation of the available geological and existing magnetic data in this area. Granitoid and volcano-sedimentary series (Upper Cretaceous) outcrop in the study area. These volcanosedimentary series consist of limestone, sandy limestone, marl, andesite, quartz andesite, basalt, and their equivalent pyroclastics. They include a thin layer of the red limestone (Upper Cretaceous) and olistolith recrystallized limestones (Jurassic-Lower Cretaceous). Zigana granitoid, intruding into all of these rocks, is high-K calc-alkaline and metaluminous and is classified as quartz monzonite, monzogranite, granite, and syenogranite as a result of its modal composition. Contact pyrometasomatic mineralization occurs in between the limestone and granitoids in the Arnastal Plateau. In addition to petrographic and mineralogical studies, magnetic methods were applied to an area of approximately 10 km2 to find any covered Fe deposits. Magnetic susceptibility values measured on the outcropped rocks ranged from 1 to 34 (10–7 SI) for limestone, 78 to 3750 (10–7 SI) for basalt, and 105 to 3946 (10–7 SI) for granitoids. It is considered that these ranges express the alteration (physical or chemical) of the rocks, their homogeneity, and the lack or presence of Fe minerals. The magnetic survey was conducted along a study area measuring 12,075 m long with 25 and/or 50 m station spacing. Processing of the magnetic data revealed the presence of eight buried Fe ores that could represent either massive or disseminated mineralization between the Sarıtaş and Kurtdere plateaus. Magnetite ore bodies may be present from the surface to a depth of approximately 15–25 m inside the limestone. In addition to the identification of new magnetite ore mineralization or bodies, a new geological map was designed by determining probable formation boundaries with this magnetic survey. © 2023, TUBITAK. All rights reserved
Gomphocerus (Gomphocerus) eyluldenizi Mol, Şirin, Taylan & Sevgili, 2023, sp. n.
No full text<i>Gomphocerus</i> (<i>Gomphocerus</i>) <i>eyluldenizi</i> Mol, sp. n. <p> <i>Gomphocerus sibiricus turcicus</i> Mistshenko: Karabağ 1958: 146; <i>Gomphocerus sibiricus turcicus</i> Mistshenko: Weidner 1969: 206; <i>Gomphocerus sibiricus turcicus</i> Mistshenko: Demirsoy 1977: 225; <i>Gomphocerus sibiricus</i> Linnaeus, 1767; Güneş 1984: 137; <i>Gomphocerus sibiricus turcicus</i> Mistshenko: Çıplak <i>et al</i>. 1999: 766; <i>Gomphocerus sibiricus turcicus</i> Mistshenko: Mol & Zeybekoğlu 2013: 98; <i>Gomphocerus sibiricus turcicus</i> Mistshenko: Mol <i>et al</i>. 2017.</p> <p> <i>Diagnosis</i>. <i>G. eyluldenizi</i> is similar to <i>G. turcicus</i> and <i>G. transcaucasicus</i> species with tegmina and alea characters of both sexes, fusion of cubital-1 and cubital 2 fields and enlarged tip of tegmina (Fig. 8). On the other hand, this beautiful species differs from the morphologically closest <i>G. turcicus</i> and <i>G. transcaucasicus</i> species with several characters as, frontal carinae is distinctly depressed, the tegmina does not reach tip of the abdomen and the length of the frontal tibia is 2.5–2.77 times its width in female (Fig. 9).</p> <p> <i>Description</i>. Male (Holotype): <i>Head and pronotum</i> (Fig. 7): Head as wide as pronotum. Vertex acute angular and smooth fastigium, with faint median carina and raised. Vertical diameter of the eye/minimum width of vertex 1.60, in paratypes 1.45–1.71, vertical diameter of eye/subocular groove 1.55, in paratypes 1.40–1.53. Vertical faveolae long, its margins slightly curved some paratypes, 3 times longer than wide, in paratypes 3.5–4. Frontal carinae divergent downward, as rounded edges distinct between antennae, with a distinctly depression at the ocellum, expanded below ocellum, and indistinctly in profile. Antennae filiform with apical club, 1.4 times longer than head plus pronotum, in paratypes 1.3. Its longest medial segment 3.1 times as long as wide, in paratypes (1.22) 1.77–2.8; the ratio of the length to width of the sixth segment from the head on the antenna clavatus is 2, in paratypes 1.66–2.91.</p> <p>Pronotum widened, its frontal margin convex hind margin angular; feebly inflated, scarcely gibbose in prosoma and mesosoma in profile. Median carina distinct and entire. Typical transversal sulcus (third sulcus) distinctly curved, located behind middle of the median carina, cut behind the middle of the median carina, length of the in front of the transversal sulcus/length of the behind the transversal sulcus 1.66, in paratypes 1.29–1.66. The maximum/ minimum width between lateral carinae 2.38, in paratypes 2.4–4.0. Front tibia pear-shaped (Fig. 9), its length 2.51 times of its maximum width, in paratypes 2.5–2.77. Hind femur is long, its length 4.18 times of its maximum width, in paratypes 4.0–4.76. Mesosternal interspace wide, 1.6 times wider than long, in paratypes 1.45–2.83.</p> <p> <i>Thorax</i>: Tegmina (Fig. 8) not reach of tip of the abdomen; apical portion of the tegmen (from the end of the first radial to the apex) exist, tegmen 3.2 times as long as maximum width, in paratypes 3.40–3.80. Stigma found in 2/5– 3/5 apical half of tegmen, the length Pc-field/the length of tegmen 0.31, in paratypes 0.27–0.33; the greatest width of costal field/ the greatest width of precostal field 1.42, in paratypes 1.30–1.50, the greatest width of costal field/the greatest width of subcostal field 3, in paratypes 2.5–3.20; subcostal vein nearly smooth, radial vein slightly sinuate S-shape, the Cubital-1 and Cubital-2 vein fused with one another here and there Cu-2 field distinct. Tympanal opening semicircle shaped, its medial height nearly 1.60 times of its medial width, in paratypes 1.50–1.79. The alae as long as the tegmen in both sexes.</p> <p> <i>Abdomen</i> (Fig. 10): Cerci in male 2.28 times as long as wide in paratypes 1.90–2.50; nearly reach the apex of anal tergum. Middle of anal tergum widened like a channel; ephiphallus two lobes, anterior projection of ephiphallus spicular, cingular valves of penis longer than apical valves.</p> <p> <i>Measurements of holotype</i> (in mm). Body 14, head 2, pronotum 3.7, tegmina 10.5, hind femur 9.</p> <p> <i>Female (Allotype)</i>: <i>Head and pronotum</i> (Fig. 7): Head slightly wider than pronotum. Vertical diameter of the eye/minimum width of vertex 1.33–1.63, vertical diameter of eye/subocular groove 1.13–1.30. Vertical faveolae and frontal carinae as in the male. Antennae filiform, slightly widened, shorter than head plus pronotum, its longest medial segment 1.50–2.64 times as long as wide, the ratio of the length to width of the sixth segment from the head on the antennae clavatus is 1.1–2.5.</p> <p>Pronotum widened, its frontal margin slightly convex, hind margin widened angular. Length of the in front of the transversal sulcus/length of the behind the transversal sulcus 1.19–1.59. The maximum/minimum width between lateral carinae 2.5–3.0. Hind femur long, its length 3.77–4.5 times of its maximum width, Mesosternal interspace wide, 1.67–2.44 times wider than long.</p> <p> <i>Thorax</i>: Tegmina (Fig. 8) generally surpass tip of the abdomen not reach hind femur; tegmen 3.69–4.5 times as long as maximum width. Costal field with white band in basally, the greatest width of costal field/ the greatest width of precostal field 0.88–1.15, the greatest width of costal field/the greatest width of subcostal field 4–5; subcostal vein nearly smooth, radial vein generally slightly sinuate <i>S-shape</i>; the Cubital-1 and Cubital-2 field distinct, narrowed. Tympanal opening semicircle shaped, its medial height nearly 1.56–1.77 times of its medial width.</p> <p> <i>Abdomen</i> (Fig. 10): Cerci 1.3–1.54 times as long as wide, not reach the apex of anal tergum; subgenital plate widened apically with narrow and shortly cavity.</p> <p> <i>Coloration</i>. In general appearance head plus pronotum blackish brown, abdomen yellowish brown dorsally and body yellowish brown ventrally, from vertex to clypeus brownish, clypeus and genea yellowish brown sometimes black in female; mouthparts yellowish white; the pronotum brownish black, inner and outer side of lateral carinae sometimes blackish, terga blackish. Tegmina brownish with dark spots along precostal and medial field and around the stigma; hind femur brownish dorsally and yellowish ventrally with an oblique blackish band dorsally and internally.</p> <p> <i>Previous records from Turkey</i>. Erzurum: Palandöken Mountains (B̧y̧k Ģney Mountains), (Demirsoy 1977).</p> <p> <i>Material examined</i>. Erzurum: Palandöken Mountains, N 39.823889, E 41.291944, 2890 m., 22.viii.2015, 10 males, 9 males (leg. A. Mol, M.S.Taylan & D. Şirin) (deposited in ASUBTAM).</p> <p> <i>Etymology</i>. The new species name refers to Eyļl and Deniz Mol who are the children of the first author.</p> <p> <i>Remarks</i>. This species has not been assessed for the IUCN Red List (2022-2). The distribution of the <i>G. eyluldenizi</i> sp. n. is restricted and its habitats are strongly under the threat of the anthropogenic effects such as winter sports activities (many ski resorts), and overgrazing. The species should be considered as a <i>Critically Endangered</i> (B1ab (i, iii)) status on the basis of the extent of occurrence criteria of IUCN (https://www.iucnredlist.org/).</p>Published as part of <i>Mol, Abbas, Şirin, Deniz, Taylan, Mehmet Sait & Sevgili, Hasan, 2023, A review of the Anatolian Gomphocerus Thunberg, 1815 (Orthoptera: Acrididae Gomphocerinae) via morphological and bioacoustics characters: data suggesting a new species, a new subgenus and three new statuses, pp. 401-429 in Zootaxa 5353 (5)</i> on pages 414-417, DOI: 10.11646/zootaxa.5353.5.1, <a href="http://zenodo.org/record/10010058">http://zenodo.org/record/10010058</a>
Sensitivity and Specificity of a Urine Circulating Anodic Antigen Test for the Diagnosis of Schistosoma haematobium in Low Endemic Settings
No full text© 2015 Knopp et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The attached file is the published version of the article.NHM Repositor
İçe girintili ve dar aralıklı klaystron kavitesinin rezonans frekansı hesabı
No full textElektromanyetik rezonatörlerin ilk kullanımına 1940'larda klaystron gibi elektronik aygıtlarda başlandığı halde, sonrasında daha başka alanlara da yayılmış ve günümüzde radar sistemleri radyo ve televizyon istasyonları, uydu sistemleri ve parçacık hızlandırıcılarında yer bulmuştur. Özellikle son yıllarda yüksek güç gerektiren modern parçacık hızlandırıcılarında çok sayıda ve değişik tipte kavite rezonatör olarak kullanılmaktadır. Örneğin, hızlandırıcının ilk katı olan elektron kaynağı kısmında kullanılan kavite sayesinde rf elektron tabancası oluşturulmuştur. Buradan çıkan atmalı ve gruplaştırılmış elektronlar daha sonra doğrusal parçacık hızlandırıcılarında hızlandırma işlemine tabi tutularak yüksek enerjilere çıkarılırlar. Doğrusal hızlandırıcı katında birbiri ile ilişkili rezonatörler (coupled resonators) bulunur. Hızlandırıcı boyunca istenilen yüksek enerji ve frekansları elde edebilmek için bu rezonatörlerin özelliklerinin detaylı olarak bilinmesi gerekmektedir. Bunun için ilk olarak enerji kaybının en az hale getirilmesi için rezonans frekansı duyarlılıklı bir şekilde hesaplanarak kavite tasarımlarının buna göre yapılması gerekmektedir. Bu tasarımlar suresince analitik hesaplamaların kıyaslanabileceği çeşitli bilgisayar programları üretilmiştir. Bunların en temeli olarak sayılan program SUPERFISH programıdır. Bu tezde sonlu farklar yöntemi kullanılarak SUPERFISH programı ile farklı geometrilere sahip rf kaviteler için duyarlıklı rezonans frekansı hesaplamaları yapılmış ve sonuçlar, analitik hesaplamalarla kıyaslanarak doğruluğu test edilmiştir. Abstract Electromagnetic resonators, while firstly used in 1940?s in apparatuses like klystrons, afterwards their usage spread into other areas and today they have found place in fields such as radar systems, radio and television stations, satellite systems and particle accelerators. Especially in recent years, many resonant cavities of different types are used in modern particle accelerators that require high power. In the first part of the particle accelerators, the electron source part, rf cavities are used to form the electron gun. Bunched particles, which are coming from the electron gun, go through the main linear accelerator where the particles are accelerated to higher energies. In this part of the particle accelerators coupled resonators are used mostly. In order to get the desired high energies and the frequencies it is necessary to know the detailed properties of these resonators. For this purpose, to reduce the energy loss to minimum first, the resonance frequency should be calculated with precision and the cavity should be designed accordingly. Various computer codes have been produced that allow comparison with the analytical calculations during all these design processes. SUPERFISH is considered as the basis of these codes. In this thesis, using the finite difference method by SUPERFISH program, calculation of resonant frequencies with precision for rf cavities having different geometry were made and the results were compared for accuracy by the analytical calculations
Factors influencing homeowners' seismic risk mitigation behavior: A case study in Zeytinburnu district of Istanbul
No full textIn Turkey, seismic risk reduction in urban areas has gained significance since 1999 Marmara Earthquakes. As the launched legislations could not be integrated into land-use planning in a comprehensive way, homeowners has made the prior responsible for risk reduction. However, the factors that influence or constraint their risk reduction behavior in a voluntary environment are not known. This study intended to search out these Factors to envisage suitable policies. Regarding the self-protective theories and their implementation in the natural hazard filed, the research has assessed the factors influencing homeowners decision process for adopting risk mitigation measures. A questionnaire survey is designed and implemented in Zeytinburnu district of Istanbul. Accordingly, taking necessary measures seemed to be affected by house maintenance expenditure, house value and perceived responsibility of central government directly, whereas perceived losses and having children were likely to increase the reluctance of respondents. Based on the findings, linking house maintenance credits with adoption of risk mitigation measures, increasing house value with certification of buildings for adopting measures and providing special credits to homeowners with children can motivate homeowners for taking these measures. Moreover, community based risk mitigation programs that increase perceived responsibility of central government and district municipality can reduce the fatalistic behavior and unwillingness. (C) 2015 Elsevier Ltd. All rights reserved.State Planning Organization (DPT) GrantsTurkiye Cumhuriyeti Kalkinma Bakanligi [BAP-08-11-DPT2002K120510]The research, was conducted when the author was working in the Middle East Technical University and writing her dissertation, supported by the State Planning Organization (DPT) Grants: BAP-08-11-DPT2002K120510, The author wants to express thanks to her supervisor Murat Balamir and co-supervisor Ute Werner for collaborating in this research. The author also wants to thank the journal reviewers for insightful comments. The judgments herein are solely attributable to the author not to others
Reduced Order Model Base Creation with Bayesian Optimization
No full textThis research considers the offline training stage of the Reduced Order Models (ROM), that has been getting attention recently on the endeavor to come up with efficient solutions for the highly complex numerical models. In this work, a simply supported beam problem has been considered, for which a reduced basis creation has been investigated. Reduced basis creation is in utmost importance for the accuracy and reliability of the ROM. Main focus is on the efficient parameter sampling strategies to enrich the reduced basis, which brings forth computational burden. To decrease this burden, a statistical tool Gaussian Processes Regression (GPR) based Bayesian Optimization (BO) is utilized. These tools are used to create a surrogate function of error indicator that is used to select additional training points for ROM. Results of this work show that randomness in the proposed procedure influences parameter sampling but does not have an impact on the overall accuracy. Finally, this work suggests further work on creation of a stopping criteria and finding a method of storing previous information and combining it with current information regarding training points without losing information. With the help of proposed further research topics, this work intends to be used as a foundation for efficient reduced basis construction
Ace gene polymorphisms are ineffective on contrast induced nephropathy
No full textBackground: The renin-angiotensin system regulates the haemodynamics. ACE gene polymorphisms are known to influence serum angiotensin converting enzyme level. Contrast nephropathy develops after exposure to intravascular contrast media that influence vascular hemodynamics. ACE gene polymorpisms may have an enhancing role in contrast media related renal injury. The aim of the study: The aim of this study was to investigate the impact of ACE insertion/deletion (I/D) polymorphism in contrast-induced nephropathy (CIN) development. Methods: 194 patients with chronic kidney disease that were administered iodinated contrast media were examined. Patients were monitored for at least 7 days for CIN development after parenteral contrast exposure. Control and patient groups were divided in terms of CIN development status. Polymerase chain reaction was performed for the genotyping of the ACE gene polymorphism from DNAs that were isolated from peripheral blood of the patients. Results: 83 patients with CIN (34 women, 49 men) and 111 control patients without CIN (43 women, 68 men) were enrolled. Gender was not statistically different between the two groups (p = 0.75). The average age of the CIN group (71) was greater than that of the control group (68). No association was detected between ACE gene polymorphism (II, ID AND DD genotypes) and CIN in both patients and controls. Conclusion: ACE gene polymorphisms does not influence contrast induced nephropathy development
