BÜLENT GÜVEN - Profile on Academia.edu (original) (raw)

Papers by BÜLENT GÜVEN

Investigations on the biological control of Tuta absoluta (Lep.: Gelechidae) in the Aegean region of Turkey

Türkiye biyolojik mücadele dergisi, 2017

Proje Tabanlı Öğrenmenin Öğrencilerin Çıkarıma Yönelik İstatistiksel Okuryazarlık Seviyelerine Etkisi

Bu calismanin amaci proje tabanli ogrenme yaklasiminin ortaokul 8. sinif ogrencilerinin cikarima ... more Bu calismanin amaci proje tabanli ogrenme yaklasiminin ortaokul 8. sinif ogrencilerinin cikarima yonelik istatistiksel okuryazarlik seviyelerine etkisini belirlemektir. Bu amacla uzman gorusleri dogrultusunda ogrencilerin veri temsiline yonelik istatistiksel okuryazarlik seviyelerini belirlemeye yonelik 10 acik uclu sorudan olusan bir veri toplama araci gelistirilmistir. Gelistirilen bu veri toplama araci 35’i deney grubu, 35’i kontrol grubu olmak uzere toplam 70 ortaokul 8. sinif ogrencisine uygulama oncesi ve uygulama sonrasi olmak uzere iki kez uygulanmistir. Tum ham puanlar Rasch analizi yapan Winsteps 3.72 modelleme programi ile lineer puanlara donusturulmustur ve lineer puanlar ile Ancova analizi yapilmistir. Elde edilen bulgulara gore proje tabanli ogrenme yaklasiminin ogrencilerin cikarima yonelik istatistiksel okuryazarlik seviyelerini etkilemedigi sonucuna varilmistir. Ogrencilerin uygulama oncesi ve uygulama sonrasi istatistiksel okuryazarlik seviyeleri elde edilen kisi m...

 is research aims to examine how gi€ ed studen ts exert their metacognition in each problem-solv... more  is research aims to examine how gi€ ed studen ts exert their metacognition in each problem-solv ing step while solving a problem . In this sense, the researchers gave four students of the 8!" grade three mathematics problems.  e data of the study was collected through clinical interviews .  e voice recordings of the students during the problem solving process and the solutions they wrote on paper formed the data of the study.  e # ndings show that gi€ ed students display metacognitive behaviours in problem solving process intensity. It was also observed that gi€ ed students display some metacognitive beh aviours which had not been determined by researchers before.  ese behaviours are seen at the stage of looking back and they are revision of connections between t opics which were learnt in the past a€ er solving a problem and relaxation of brain in order to evaluate what has been done by thinking over alternative ways.  e # ndings of the research are important in terms o...

Bu calisma ile matematik ve geometri derslerinde grafik tablet kullanimina yonelik ogrenci tutum ... more Bu calisma ile matematik ve geometri derslerinde grafik tablet kullanimina yonelik ogrenci tutum olcegi gelistirilmesi amaclanmistir. Bu amacla uzman gorusleri dogrultusunda 6 faktor ve 24 maddeden olusan 5'li Likert tipi olcek gelistirilmistir. Olcek, 2010-2011 Egitim Ogretim yilinda Trabzon'da bir Anadolu Lisesinde 9, 10 ve 11. siniftan toplam 150 ogrenciye uygulanmistir. Calisma arastirmacinin matematik ve geometri derslerini bir yil boyunca grafik tablet kullanarak yuruttugu sekiz sinif uzerinde yapilmistir. Olcegin gecerlilik ve guvenilirlik calismalarina yonelik dogrulayici faktor analizi yapilmis ve elde edilen bulgular sonucunda gelistirilen olcegin ogrencilerin matematik ve geometri derslerinde grafik tablet kullanimi ile ilgili tutumlarini olcmede kullanilabilecegi sonucuna varilmistir. Anahtar Kelimeler: Matematik egitimi, grafik tablet, tutum olcegi

Turkish Journal of Computer and Mathematics Education (TURCOMAT), 2019

Öz: Geometrik düşünme alışkanlıklarının matematik dersleri üzerindeki etkisini ortaya çıkarmak, k... more Öz: Geometrik düşünme alışkanlıklarının matematik dersleri üzerindeki etkisini ortaya çıkarmak, kavramsal boyutta öğretimin nasıl gerçekleşeceğine etkileyebilir. Bu kapsamda çalışmanın amacı matematik öğretmeni adaylarının geometrik düşünme alışkanlıkları ile matematik başarıları arasındaki ilişkiyi belirlemektir. Bu amaç doğrultusunda çalışma, bir devlet üniversitesinde matematik öğretmenliği dördüncü sınıfta öğrenim gören 30 öğretmen adayı ile ilişkisel desen yöntemi kullanılarak yürütülmüştür. Çalışmada öğretmen adaylarının geometrik düşünme alışkanlıkları başarı testinden aldığı puanlar ile dördüncü sınıfa kadar olan matematik derslerinden aldığı puanlar arasındaki ilişki analiz edilmiştir. Çalışma sonucunda öğretmen adaylarının Geometri, Analitik Geometri 2 ve Matematiksel Yazılımlar dersleri ile geometrik düşünme alışkanlıkları puanları arasında yüksek düzeyde, pozitif ve anlamlı bir ilişki bulunmuştur. Bu durum öğretmen adaylarının karşılaştığı problemlerin üstesinden gelirken aslında geometrik düşünme alışkanlıklarını da kullandığı anlamına gelmektedir.

Interleukin-32 levels in gingival crevicular fluid and saliva of patients with chronic periodontitis after periodontal treatment

Journal of Periodontal Research, 2016

BACKGROUND AND OBJECTIVE The cytokine, interleukin (IL)-32, is a relatively new discovery. Howeve... more BACKGROUND AND OBJECTIVE The cytokine, interleukin (IL)-32, is a relatively new discovery. However, it is very powerful for stimulating tumor necrosis factor-alpha (TNF-α) under inflammatory conditions. The objective of this research was to explore fluctuations in the levels of TNF-α, IL-32 and IL-10, in both saliva and gingival crevicular fluid. The focus was on measurements taken before and after clinical treatment of chronic periodontitis. MATERIAL AND METHODS For the purposes of the study, a total of 27 patients with chronic periodontitis and 27 controls (periodontally healthy) were recruited. Important clinical periodontal criteria were established before and 4 wk after the start of the research. The chronic periodontitis group was given an initial form of periodontal care. Samples of saliva and gingival crevicular fluid were collected exactly 4 wk preceding and 4 wk following the care. The levels of IL-10, IL-32 and TNF-α present in saliva and gingival crevicular fluid were recorded via the use of an ELISA. RESULTS At baseline, the levels of TNF-α and IL-32 in the gingival crevicular fluid and saliva were significantly higher among patients in the chronic periodontitis group than among patients in the control group (p < 0.05). On the other hand, at baseline the levels of IL-10 were significantly lower in the gingival crevicular fluid and saliva of the chronic periodontitis group than the control group (p < 0.05). A significantly positive link was found between the TNF-α and IL-32 levels in the two study groups (p < 0.05). After treatment, the levels of TNF-α and IL-32 in saliva and gingival crevicular fluid were significantly lower in the chronic periodontitis group when compared with the baseline readings. However, the levels of IL-10 were significantly higher (p < 0.05). CONCLUSION Ultimately, the level of IL-32 present in saliva and gingival crevicular fluid might be useful as an indicator of the condition and the expectations for its treatment and care. According to the results of the research, the proinflammatory impact of IL-32 could potentially be linked to the intensity and progression of periodontitis.

Case images: progression of coronary artery aneurysms in incomplete Kawasaki disease

Türk Kardiyoloji Derneği arşivi : Türk Kardiyoloji Derneğinin yayın organıdır, 2011

International Journal of Mathematical Education in Science and Technology, 2015

The point of this study is to define the effect of project-based learning approach on 8th Grade s... more The point of this study is to define the effect of project-based learning approach on 8th Grade secondary-school students' statistical literacy levels for data representation. To achieve this goal, a test which consists of 12 open-ended questions in accordance with the views of experts was developed. Seventy 8th grade secondary-school students, 35 in the experimental group and 35 in the control group, took this test twice, one before the application and one after the application. All the raw scores were turned into linear points by using the Winsteps 3.72 modelling program that makes the Rasch analysis and t-tests, and an ANCOVA analysis was carried out with the linear points. Depending on the findings, it was concluded that the project-based learning approach increases students' level of statistical literacy for data representation. Students' levels of statistical literacy before and after the application were shown through the obtained person-item maps.

Procedia - Social and Behavioral Sciences, 2011

One of the aims of instruction is to train individuals who can solve the problem. For that reason... more One of the aims of instruction is to train individuals who can solve the problem. For that reason, future teachers should have problem solving skills. Thus, the aim of this study is to examine the change over the years of problem solving skills of preservice elementary mathematics teachers. The participants consisted of 1st, 2nd, 3rd and 4th class of pre-service teachers in Elementary Mathematics Teacher Education Program in Karadeniz Technical University. For each class, three students having low, medium and high academic level were selected. In concordance with the purpose of study, three non-routine problems were asked to pre-service teachers accompanied by clinical interviews. The research lasted for three weeks in second semester of the academic year of 2009-2010 at the Faculty of Fatih Education. In problem-solving process, problem solving strategies used by teachers and teachers' thoughts are summarized in tables. For the first question; while first-year students haven't used any strategies, other students have used making a drawing and accounting for all possibilities strategies. For the second question; while first-year students have only used making a drawing strategy, beside this strategy, others have used organizing data and adopting a different point of view strategy. For the last question; while first-year, second-year and third-year students have used making a drawing and finding a pattern strategies, second-year, third-year and senior students having high academic level have utilized organizing data as well as these strategies and answered the problem.Therefore, it is suggested that problem solving oriented lessons should be heightened so as to improve problem solving skills of pre-service elementary mathematics teachers.

Procedia - Social and Behavioral Sciences, 2010

This study investigates the effect of materials developed based on conceptual change approach on ... more This study investigates the effect of materials developed based on conceptual change approach on 9 th grade students' achievement in the subject of fractions. With this aim, a worksheet, conceptual change text and a two-stage performance test on the subject of fractions were developed. Quasi-experimental research model was used in the study. Following this model, the fractions were taught with traditional method in the control group and it was taught using worksheets and conceptual change texts in the experimental group. The performance test was applied as pre-and post-tests to total 46 students studying at two different 9 th grade classes of a high school in Trabzon during 2008-2009 school year. The results of the study revealed that the instructional materials increased students' success in the experimental group. Therefore, it's recommended to use the materials developed during the course in mathematics classes and to develop similar materials for other subject matters.

Procedia - Social and Behavioral Sciences, 2010

In this study, the effect of Cabri 2d software on drawings of height, perpendicular bisector in t... more In this study, the effect of Cabri 2d software on drawings of height, perpendicular bisector in triangles and diagonal in polygons was explored. Case study method was used in the study. Diagnostic questions and computer assisted worksheets related to height, perpendicular bisector and diagonal concepts were developed as data collecting tools. Diagnostic questions were posed as preand post-implementations to total 25 students studying at 8 th grade of an elementary school in Trabzon. Students' answers to questions were analyzed and presented in tables. As a result of the study, Cabri 2d software was found to positively contribute to students' better understanding of height, perpendicular bisector and diagonal concepts. Therefore, it's recommended to develop and use in the classes Cabri 2d assisted worksheets also for other subjects of geometry.

Procedia - Social and Behavioral Sciences, 2011

The aim of this study is to investigate mathematics teachers' views about measurement-evaluation ... more The aim of this study is to investigate mathematics teachers' views about measurement-evaluation dimension of new Turkish geometry curriculum. With this aim, 15 mathematics teachers who are selected from Artvin, Bayburt, Rize and Trabzon were carried out semi-structured interview. As a result, it was seen that teachers in our samples tend to apply traditional measurement and evaluation approach as they find the new measurement-evaluation dimension difficult and uneasy using the tools and methods. And the teachers are not aware of which tools are to be used in alternative measurement and evaluation approach or they do not know how to use it. Also, there are teachers who have negative views about new approach. These teachers have stated the main issue occurs due to time limitations, crowded classes, lack of tools and materials and density of class hours.

Bolema: …, 2011

The aim of this study is to reveal concept development and the way limit and continuity concepts ... more The aim of this study is to reveal concept development and the way limit and continuity concepts are understood by students from different levels of education. For this purpose, a test comprising open-ended questions about verbal, algebraic and graphical representations of concepts was administered to students from different levels of education. When students' understandings of limit and continuity concepts are compared, the pre-service teachers in their 3 rd year of study were found much less successful than other students in algebraic, verbal and graphical representations of limit and continuity concepts. It may be recommended that when designing instructional activities verbal, graphical and algebraic representations should be prioritized to enhance the development of students' interpretation skills of different representations of functions.

development, 2008

Geometry is the study of shape and space. Without spatial ability, students cannot fully apprecia... more Geometry is the study of shape and space. Without spatial ability, students cannot fully appreciate the natural world. Spatial ability is also very important for work in various fields such as computer graphics, engineering, architecture, and cartography. A number of studies have demonstrated that technology has an important potential to develop spatial skills. In the present study, the effect of dynamic geometry software (DGS) Cabri 3D on student mathematics teachers' spatial skills was examined. The study used a one-group pretest-interventionposttest experimental design. In this context, 40 student mathematics teachers took "Purdue Spatial Visualization" (PSV) test as pretest at the beginning of the study, and then some implementations were carried out with these students by using Cabri 3D software for 8 weeks. The PSV test was retaken by students at the end of the study. That if there was a meaningful difference between the pretest and posttest results was examined by using paired sample t test. The findings demonstrated that these computer supported activities contributed to development student mathematics teachers' spatial skills.

The gap between expectations and reality: integrating computers into mathematics classrooms

Asia Pacific Education Review, 2009

Ortaöğreti̇m Öğrenci̇leri̇ni̇n Günlük Yaşam Problemleri̇ni̇ Çözebi̇lme Beceri̇leri̇ni̇n Beli̇rlenmesi̇

DergiPark (Istanbul University), Apr 11, 2012

Bu calismada dokuzuncu ve onbirinci sinif ogrencilerinin gunluk yasam problemlerini cozebilme bec... more Bu calismada dokuzuncu ve onbirinci sinif ogrencilerinin gunluk yasam problemlerini cozebilme becerilerini incelemek ve bu iki sinif arasinda karsilastirma yaparak gercek yasam problemlerin cozumunde ogrencilerin gelisimlerini tespit etmek amaclanmistir. Calismanin orneklemini Trabzon ilinde iki lisede ogrenim goren 41’i dokuzuncu, 34’u onbirinci sinif ogrencisi olmak uzere toplam 75 ogrenci olusturmaktadir. Ogrencilere uc gunluk yasam problemi verilmis ve ogrencilerin cozumleri analiz edilmistir. Dokuzuncu ve onbirinci sinif ogrencilerinin problem cozme puanlari arasinda anlamli bir farkin olup olmadigini belirlemek icin bu verilere. 05 anlam duzeyinde bagimsiz t testi uygulanmistir. Calismanin sonucunda ogrencilerin cogunlugunun gunluk hayat problemlerini cozme becerilerinin yetersiz oldugu ortaya cikmistir. Ayrica ogrenci cozumlerinde basarisizliga goturen kirilma noktasinin matematiksel modeli kurma asamasi olarak tespit edilmistir. Buna karsin ogrencilerin gercek yasam durumunu matematiksel olarak ifade ettikten sonra ulastiklari esitligin veya esitsizligin cozum kumesini bulmada basarili olduklari gorulmustur.

Okul öncesi öğretmenlerinin ve öğretmen adaylarının okul öncesi matematik eğitimine ilişkin inançların belirlenmesine yönelik bir ölçek geliştirme çalışması

İlköğretim online, Jun 26, 2013

There is a global movement toward increasing the number of early childhood education services for... more There is a global movement toward increasing the number of early childhood education services for young children. Through early education, children’s development will be supported. It can be asserted that mathematical experiences of the children in pre-school education not only change their attitudes related to mathematics but also develop their mathematics learning significantly. Therefore, it is claimed that the beliefs of pre-school teachers or pre-service pre-school teachers related to the mathematics, mathematics education and learning of mathematics have a direct effect on children’s mathematics experiences. In this study, a scale is developed in order to determine the beliefs of pre-school teachers or pre-service early childhood education teachers related to the mathematics, mathematics education and learning of mathematics. A factor analysis is done by implementing a belief scale consisting of 74 items on 456 pre-service teachers. A belief scale of 32 items is prepared with respect to the results.

The Relationship Between Secondary Students' Beliefs on Mathemati̇cal Problem Solvi̇ng and Mathemati̇cal Self-Efficacy Perception and Their Achievement in Routine and Non-Rountine Problems

NWSA Journal

ABSTRACT

Eğitim ve Bilim

Bu çalışma ile matematik öğretmenlerinin kullandıkları problem türlerinin belirlenmesi ve kullanı... more Bu çalışma ile matematik öğretmenlerinin kullandıkları problem türlerinin belirlenmesi ve kullanılan problem türlerinin öğretmenlere bağlı olup olmadığının tespit edilmesi amaçlanmıştır. Bu çalışma kapsamında yapılan literatür çalışması sonucunda problemler sunuş, içerik ve çözüm olmak üzere 3 kategoride sınıflandırılmıştır. Bu problem yapılarını detaylandırmak ve öğretmenlerin kullandıkları problem türlerini belirlemek amacıyla Trabzon İli içerisinden seçilen 4 ilköğretim matematik öğretmeninin dersleri bir ay süreyle izlenmiştir. Gözlemler yardımıyla belirtilen problem yapılarına yönelik alt kategoriler oluşturulmuştur. Sunuş açısından öğretmenlerin daha çok sözel, kısa ve çok sayısal veri içermeyen problemleri tercih ettikleri görülmüştür. İçerik açısından ilgisiz ve eksik veri içermeyen, müfredata bağımlı ve rutin problemlerin baskın olduğu ortaya çıkarken; çözüm yapısında ise en çok kolay ve bol işlem içermeyen problem türleri tercih edilmektedir.Her ne kadar öğretmenlerin yetiştirmesi gereken bir müfredat ve sistem gereği yapılan bir seviye belirleme sınavı gibi engeller mevcut olsa da öğretmenlerin farklı problem türleri hakkında bilinçlenerek belirli aralıklarla sınıf ortamında kullanmalarının hem öğrencilerin farklı problem türlerini görmeleri hem de problem çözme başarılarını artırabilmeleri açısından önemli olacağı düşünülmektedir.

TED EĞİTİM VE BİLİM, 2014

Bu çalışmanın amacı olasılık ünitesinin alt konularının öğrenimi/öğretimi için geliştirilen UZWEB... more Bu çalışmanın amacı olasılık ünitesinin alt konularının öğrenimi/öğretimi için geliştirilen UZWEBMAT (Uyarlanabilir Zeki WEB tabanlı MATematik eğitimi) ile oluşturulan öğrenme ortamından yansımaların nitel olarak değerlendirilmesidir. Çalışma 2010-2011 yılında Trabzon, Türkiye'deki iki farklı anadolu lisesinin üç farklı onuncu sınıfındaki öğrencilerle özel durum çalışması olarak yürütülmüştür. Çalışmaya toplam seksen bir öğrenci ve üç öğretmen katılmıştır. Veri toplama aracı olarak öğretmen ve öğrencilerden nitel veriler elde etmeye yarayan mülakat formları kullanılmıştır. Katılımcılardan elde edilen nitel veriler içerik analizine tabi tutulmuştur. Çalışmadan elde edilen yansımalar olumlu ve olumsuz olmak üzere iki başlık altında toplanmıştır. UZWEBMAT ile oluşturulan matematik öğrenme ortamından, bireysel öğrenim görme, matematiksel ilişkileri ve formülleri keşfetme, öğrenmede sorumluluk alma gibi olumlu yansımaların olduğu sonucuna ulaşılmıştır. Bu olumlu yansımaların yanında merkezi sınavlarda başarısız olunacağı kaygısı ve matematiğin her konusunun bu tür bir sistemle öğrenilemeyeceği kaygısı da olumsuz yansımalar olarak öne çıkmıştır. Bireysel öğrenme Öğrenme stilleri Matematik öğretimi

Investigations on the biological control of Tuta absoluta (Lep.: Gelechidae) in the Aegean region of Turkey

Türkiye biyolojik mücadele dergisi, 2017

Proje Tabanlı Öğrenmenin Öğrencilerin Çıkarıma Yönelik İstatistiksel Okuryazarlık Seviyelerine Etkisi

Bu calismanin amaci proje tabanli ogrenme yaklasiminin ortaokul 8. sinif ogrencilerinin cikarima ... more Bu calismanin amaci proje tabanli ogrenme yaklasiminin ortaokul 8. sinif ogrencilerinin cikarima yonelik istatistiksel okuryazarlik seviyelerine etkisini belirlemektir. Bu amacla uzman gorusleri dogrultusunda ogrencilerin veri temsiline yonelik istatistiksel okuryazarlik seviyelerini belirlemeye yonelik 10 acik uclu sorudan olusan bir veri toplama araci gelistirilmistir. Gelistirilen bu veri toplama araci 35’i deney grubu, 35’i kontrol grubu olmak uzere toplam 70 ortaokul 8. sinif ogrencisine uygulama oncesi ve uygulama sonrasi olmak uzere iki kez uygulanmistir. Tum ham puanlar Rasch analizi yapan Winsteps 3.72 modelleme programi ile lineer puanlara donusturulmustur ve lineer puanlar ile Ancova analizi yapilmistir. Elde edilen bulgulara gore proje tabanli ogrenme yaklasiminin ogrencilerin cikarima yonelik istatistiksel okuryazarlik seviyelerini etkilemedigi sonucuna varilmistir. Ogrencilerin uygulama oncesi ve uygulama sonrasi istatistiksel okuryazarlik seviyeleri elde edilen kisi m...

 is research aims to examine how gi€ ed studen ts exert their metacognition in each problem-solv... more  is research aims to examine how gi€ ed studen ts exert their metacognition in each problem-solv ing step while solving a problem . In this sense, the researchers gave four students of the 8!" grade three mathematics problems.  e data of the study was collected through clinical interviews .  e voice recordings of the students during the problem solving process and the solutions they wrote on paper formed the data of the study.  e # ndings show that gi€ ed students display metacognitive behaviours in problem solving process intensity. It was also observed that gi€ ed students display some metacognitive beh aviours which had not been determined by researchers before.  ese behaviours are seen at the stage of looking back and they are revision of connections between t opics which were learnt in the past a€ er solving a problem and relaxation of brain in order to evaluate what has been done by thinking over alternative ways.  e # ndings of the research are important in terms o...

Bu calisma ile matematik ve geometri derslerinde grafik tablet kullanimina yonelik ogrenci tutum ... more Bu calisma ile matematik ve geometri derslerinde grafik tablet kullanimina yonelik ogrenci tutum olcegi gelistirilmesi amaclanmistir. Bu amacla uzman gorusleri dogrultusunda 6 faktor ve 24 maddeden olusan 5'li Likert tipi olcek gelistirilmistir. Olcek, 2010-2011 Egitim Ogretim yilinda Trabzon'da bir Anadolu Lisesinde 9, 10 ve 11. siniftan toplam 150 ogrenciye uygulanmistir. Calisma arastirmacinin matematik ve geometri derslerini bir yil boyunca grafik tablet kullanarak yuruttugu sekiz sinif uzerinde yapilmistir. Olcegin gecerlilik ve guvenilirlik calismalarina yonelik dogrulayici faktor analizi yapilmis ve elde edilen bulgular sonucunda gelistirilen olcegin ogrencilerin matematik ve geometri derslerinde grafik tablet kullanimi ile ilgili tutumlarini olcmede kullanilabilecegi sonucuna varilmistir. Anahtar Kelimeler: Matematik egitimi, grafik tablet, tutum olcegi

Turkish Journal of Computer and Mathematics Education (TURCOMAT), 2019

Öz: Geometrik düşünme alışkanlıklarının matematik dersleri üzerindeki etkisini ortaya çıkarmak, k... more Öz: Geometrik düşünme alışkanlıklarının matematik dersleri üzerindeki etkisini ortaya çıkarmak, kavramsal boyutta öğretimin nasıl gerçekleşeceğine etkileyebilir. Bu kapsamda çalışmanın amacı matematik öğretmeni adaylarının geometrik düşünme alışkanlıkları ile matematik başarıları arasındaki ilişkiyi belirlemektir. Bu amaç doğrultusunda çalışma, bir devlet üniversitesinde matematik öğretmenliği dördüncü sınıfta öğrenim gören 30 öğretmen adayı ile ilişkisel desen yöntemi kullanılarak yürütülmüştür. Çalışmada öğretmen adaylarının geometrik düşünme alışkanlıkları başarı testinden aldığı puanlar ile dördüncü sınıfa kadar olan matematik derslerinden aldığı puanlar arasındaki ilişki analiz edilmiştir. Çalışma sonucunda öğretmen adaylarının Geometri, Analitik Geometri 2 ve Matematiksel Yazılımlar dersleri ile geometrik düşünme alışkanlıkları puanları arasında yüksek düzeyde, pozitif ve anlamlı bir ilişki bulunmuştur. Bu durum öğretmen adaylarının karşılaştığı problemlerin üstesinden gelirken aslında geometrik düşünme alışkanlıklarını da kullandığı anlamına gelmektedir.

Interleukin-32 levels in gingival crevicular fluid and saliva of patients with chronic periodontitis after periodontal treatment

Journal of Periodontal Research, 2016

BACKGROUND AND OBJECTIVE The cytokine, interleukin (IL)-32, is a relatively new discovery. Howeve... more BACKGROUND AND OBJECTIVE The cytokine, interleukin (IL)-32, is a relatively new discovery. However, it is very powerful for stimulating tumor necrosis factor-alpha (TNF-α) under inflammatory conditions. The objective of this research was to explore fluctuations in the levels of TNF-α, IL-32 and IL-10, in both saliva and gingival crevicular fluid. The focus was on measurements taken before and after clinical treatment of chronic periodontitis. MATERIAL AND METHODS For the purposes of the study, a total of 27 patients with chronic periodontitis and 27 controls (periodontally healthy) were recruited. Important clinical periodontal criteria were established before and 4 wk after the start of the research. The chronic periodontitis group was given an initial form of periodontal care. Samples of saliva and gingival crevicular fluid were collected exactly 4 wk preceding and 4 wk following the care. The levels of IL-10, IL-32 and TNF-α present in saliva and gingival crevicular fluid were recorded via the use of an ELISA. RESULTS At baseline, the levels of TNF-α and IL-32 in the gingival crevicular fluid and saliva were significantly higher among patients in the chronic periodontitis group than among patients in the control group (p < 0.05). On the other hand, at baseline the levels of IL-10 were significantly lower in the gingival crevicular fluid and saliva of the chronic periodontitis group than the control group (p < 0.05). A significantly positive link was found between the TNF-α and IL-32 levels in the two study groups (p < 0.05). After treatment, the levels of TNF-α and IL-32 in saliva and gingival crevicular fluid were significantly lower in the chronic periodontitis group when compared with the baseline readings. However, the levels of IL-10 were significantly higher (p < 0.05). CONCLUSION Ultimately, the level of IL-32 present in saliva and gingival crevicular fluid might be useful as an indicator of the condition and the expectations for its treatment and care. According to the results of the research, the proinflammatory impact of IL-32 could potentially be linked to the intensity and progression of periodontitis.

Case images: progression of coronary artery aneurysms in incomplete Kawasaki disease

Türk Kardiyoloji Derneği arşivi : Türk Kardiyoloji Derneğinin yayın organıdır, 2011

International Journal of Mathematical Education in Science and Technology, 2015

The point of this study is to define the effect of project-based learning approach on 8th Grade s... more The point of this study is to define the effect of project-based learning approach on 8th Grade secondary-school students' statistical literacy levels for data representation. To achieve this goal, a test which consists of 12 open-ended questions in accordance with the views of experts was developed. Seventy 8th grade secondary-school students, 35 in the experimental group and 35 in the control group, took this test twice, one before the application and one after the application. All the raw scores were turned into linear points by using the Winsteps 3.72 modelling program that makes the Rasch analysis and t-tests, and an ANCOVA analysis was carried out with the linear points. Depending on the findings, it was concluded that the project-based learning approach increases students' level of statistical literacy for data representation. Students' levels of statistical literacy before and after the application were shown through the obtained person-item maps.

Procedia - Social and Behavioral Sciences, 2011

One of the aims of instruction is to train individuals who can solve the problem. For that reason... more One of the aims of instruction is to train individuals who can solve the problem. For that reason, future teachers should have problem solving skills. Thus, the aim of this study is to examine the change over the years of problem solving skills of preservice elementary mathematics teachers. The participants consisted of 1st, 2nd, 3rd and 4th class of pre-service teachers in Elementary Mathematics Teacher Education Program in Karadeniz Technical University. For each class, three students having low, medium and high academic level were selected. In concordance with the purpose of study, three non-routine problems were asked to pre-service teachers accompanied by clinical interviews. The research lasted for three weeks in second semester of the academic year of 2009-2010 at the Faculty of Fatih Education. In problem-solving process, problem solving strategies used by teachers and teachers' thoughts are summarized in tables. For the first question; while first-year students haven't used any strategies, other students have used making a drawing and accounting for all possibilities strategies. For the second question; while first-year students have only used making a drawing strategy, beside this strategy, others have used organizing data and adopting a different point of view strategy. For the last question; while first-year, second-year and third-year students have used making a drawing and finding a pattern strategies, second-year, third-year and senior students having high academic level have utilized organizing data as well as these strategies and answered the problem.Therefore, it is suggested that problem solving oriented lessons should be heightened so as to improve problem solving skills of pre-service elementary mathematics teachers.

Procedia - Social and Behavioral Sciences, 2010

This study investigates the effect of materials developed based on conceptual change approach on ... more This study investigates the effect of materials developed based on conceptual change approach on 9 th grade students' achievement in the subject of fractions. With this aim, a worksheet, conceptual change text and a two-stage performance test on the subject of fractions were developed. Quasi-experimental research model was used in the study. Following this model, the fractions were taught with traditional method in the control group and it was taught using worksheets and conceptual change texts in the experimental group. The performance test was applied as pre-and post-tests to total 46 students studying at two different 9 th grade classes of a high school in Trabzon during 2008-2009 school year. The results of the study revealed that the instructional materials increased students' success in the experimental group. Therefore, it's recommended to use the materials developed during the course in mathematics classes and to develop similar materials for other subject matters.

Procedia - Social and Behavioral Sciences, 2010

In this study, the effect of Cabri 2d software on drawings of height, perpendicular bisector in t... more In this study, the effect of Cabri 2d software on drawings of height, perpendicular bisector in triangles and diagonal in polygons was explored. Case study method was used in the study. Diagnostic questions and computer assisted worksheets related to height, perpendicular bisector and diagonal concepts were developed as data collecting tools. Diagnostic questions were posed as preand post-implementations to total 25 students studying at 8 th grade of an elementary school in Trabzon. Students' answers to questions were analyzed and presented in tables. As a result of the study, Cabri 2d software was found to positively contribute to students' better understanding of height, perpendicular bisector and diagonal concepts. Therefore, it's recommended to develop and use in the classes Cabri 2d assisted worksheets also for other subjects of geometry.

Procedia - Social and Behavioral Sciences, 2011

The aim of this study is to investigate mathematics teachers' views about measurement-evaluation ... more The aim of this study is to investigate mathematics teachers' views about measurement-evaluation dimension of new Turkish geometry curriculum. With this aim, 15 mathematics teachers who are selected from Artvin, Bayburt, Rize and Trabzon were carried out semi-structured interview. As a result, it was seen that teachers in our samples tend to apply traditional measurement and evaluation approach as they find the new measurement-evaluation dimension difficult and uneasy using the tools and methods. And the teachers are not aware of which tools are to be used in alternative measurement and evaluation approach or they do not know how to use it. Also, there are teachers who have negative views about new approach. These teachers have stated the main issue occurs due to time limitations, crowded classes, lack of tools and materials and density of class hours.

Bolema: …, 2011

The aim of this study is to reveal concept development and the way limit and continuity concepts ... more The aim of this study is to reveal concept development and the way limit and continuity concepts are understood by students from different levels of education. For this purpose, a test comprising open-ended questions about verbal, algebraic and graphical representations of concepts was administered to students from different levels of education. When students' understandings of limit and continuity concepts are compared, the pre-service teachers in their 3 rd year of study were found much less successful than other students in algebraic, verbal and graphical representations of limit and continuity concepts. It may be recommended that when designing instructional activities verbal, graphical and algebraic representations should be prioritized to enhance the development of students' interpretation skills of different representations of functions.

development, 2008

Geometry is the study of shape and space. Without spatial ability, students cannot fully apprecia... more Geometry is the study of shape and space. Without spatial ability, students cannot fully appreciate the natural world. Spatial ability is also very important for work in various fields such as computer graphics, engineering, architecture, and cartography. A number of studies have demonstrated that technology has an important potential to develop spatial skills. In the present study, the effect of dynamic geometry software (DGS) Cabri 3D on student mathematics teachers' spatial skills was examined. The study used a one-group pretest-interventionposttest experimental design. In this context, 40 student mathematics teachers took "Purdue Spatial Visualization" (PSV) test as pretest at the beginning of the study, and then some implementations were carried out with these students by using Cabri 3D software for 8 weeks. The PSV test was retaken by students at the end of the study. That if there was a meaningful difference between the pretest and posttest results was examined by using paired sample t test. The findings demonstrated that these computer supported activities contributed to development student mathematics teachers' spatial skills.

The gap between expectations and reality: integrating computers into mathematics classrooms

Asia Pacific Education Review, 2009

Ortaöğreti̇m Öğrenci̇leri̇ni̇n Günlük Yaşam Problemleri̇ni̇ Çözebi̇lme Beceri̇leri̇ni̇n Beli̇rlenmesi̇

DergiPark (Istanbul University), Apr 11, 2012

Bu calismada dokuzuncu ve onbirinci sinif ogrencilerinin gunluk yasam problemlerini cozebilme bec... more Bu calismada dokuzuncu ve onbirinci sinif ogrencilerinin gunluk yasam problemlerini cozebilme becerilerini incelemek ve bu iki sinif arasinda karsilastirma yaparak gercek yasam problemlerin cozumunde ogrencilerin gelisimlerini tespit etmek amaclanmistir. Calismanin orneklemini Trabzon ilinde iki lisede ogrenim goren 41’i dokuzuncu, 34’u onbirinci sinif ogrencisi olmak uzere toplam 75 ogrenci olusturmaktadir. Ogrencilere uc gunluk yasam problemi verilmis ve ogrencilerin cozumleri analiz edilmistir. Dokuzuncu ve onbirinci sinif ogrencilerinin problem cozme puanlari arasinda anlamli bir farkin olup olmadigini belirlemek icin bu verilere. 05 anlam duzeyinde bagimsiz t testi uygulanmistir. Calismanin sonucunda ogrencilerin cogunlugunun gunluk hayat problemlerini cozme becerilerinin yetersiz oldugu ortaya cikmistir. Ayrica ogrenci cozumlerinde basarisizliga goturen kirilma noktasinin matematiksel modeli kurma asamasi olarak tespit edilmistir. Buna karsin ogrencilerin gercek yasam durumunu matematiksel olarak ifade ettikten sonra ulastiklari esitligin veya esitsizligin cozum kumesini bulmada basarili olduklari gorulmustur.

Okul öncesi öğretmenlerinin ve öğretmen adaylarının okul öncesi matematik eğitimine ilişkin inançların belirlenmesine yönelik bir ölçek geliştirme çalışması

İlköğretim online, Jun 26, 2013

There is a global movement toward increasing the number of early childhood education services for... more There is a global movement toward increasing the number of early childhood education services for young children. Through early education, children’s development will be supported. It can be asserted that mathematical experiences of the children in pre-school education not only change their attitudes related to mathematics but also develop their mathematics learning significantly. Therefore, it is claimed that the beliefs of pre-school teachers or pre-service pre-school teachers related to the mathematics, mathematics education and learning of mathematics have a direct effect on children’s mathematics experiences. In this study, a scale is developed in order to determine the beliefs of pre-school teachers or pre-service early childhood education teachers related to the mathematics, mathematics education and learning of mathematics. A factor analysis is done by implementing a belief scale consisting of 74 items on 456 pre-service teachers. A belief scale of 32 items is prepared with respect to the results.

The Relationship Between Secondary Students' Beliefs on Mathemati̇cal Problem Solvi̇ng and Mathemati̇cal Self-Efficacy Perception and Their Achievement in Routine and Non-Rountine Problems

NWSA Journal

ABSTRACT

Eğitim ve Bilim

Bu çalışma ile matematik öğretmenlerinin kullandıkları problem türlerinin belirlenmesi ve kullanı... more Bu çalışma ile matematik öğretmenlerinin kullandıkları problem türlerinin belirlenmesi ve kullanılan problem türlerinin öğretmenlere bağlı olup olmadığının tespit edilmesi amaçlanmıştır. Bu çalışma kapsamında yapılan literatür çalışması sonucunda problemler sunuş, içerik ve çözüm olmak üzere 3 kategoride sınıflandırılmıştır. Bu problem yapılarını detaylandırmak ve öğretmenlerin kullandıkları problem türlerini belirlemek amacıyla Trabzon İli içerisinden seçilen 4 ilköğretim matematik öğretmeninin dersleri bir ay süreyle izlenmiştir. Gözlemler yardımıyla belirtilen problem yapılarına yönelik alt kategoriler oluşturulmuştur. Sunuş açısından öğretmenlerin daha çok sözel, kısa ve çok sayısal veri içermeyen problemleri tercih ettikleri görülmüştür. İçerik açısından ilgisiz ve eksik veri içermeyen, müfredata bağımlı ve rutin problemlerin baskın olduğu ortaya çıkarken; çözüm yapısında ise en çok kolay ve bol işlem içermeyen problem türleri tercih edilmektedir.Her ne kadar öğretmenlerin yetiştirmesi gereken bir müfredat ve sistem gereği yapılan bir seviye belirleme sınavı gibi engeller mevcut olsa da öğretmenlerin farklı problem türleri hakkında bilinçlenerek belirli aralıklarla sınıf ortamında kullanmalarının hem öğrencilerin farklı problem türlerini görmeleri hem de problem çözme başarılarını artırabilmeleri açısından önemli olacağı düşünülmektedir.

TED EĞİTİM VE BİLİM, 2014

Bu çalışmanın amacı olasılık ünitesinin alt konularının öğrenimi/öğretimi için geliştirilen UZWEB... more Bu çalışmanın amacı olasılık ünitesinin alt konularının öğrenimi/öğretimi için geliştirilen UZWEBMAT (Uyarlanabilir Zeki WEB tabanlı MATematik eğitimi) ile oluşturulan öğrenme ortamından yansımaların nitel olarak değerlendirilmesidir. Çalışma 2010-2011 yılında Trabzon, Türkiye'deki iki farklı anadolu lisesinin üç farklı onuncu sınıfındaki öğrencilerle özel durum çalışması olarak yürütülmüştür. Çalışmaya toplam seksen bir öğrenci ve üç öğretmen katılmıştır. Veri toplama aracı olarak öğretmen ve öğrencilerden nitel veriler elde etmeye yarayan mülakat formları kullanılmıştır. Katılımcılardan elde edilen nitel veriler içerik analizine tabi tutulmuştur. Çalışmadan elde edilen yansımalar olumlu ve olumsuz olmak üzere iki başlık altında toplanmıştır. UZWEBMAT ile oluşturulan matematik öğrenme ortamından, bireysel öğrenim görme, matematiksel ilişkileri ve formülleri keşfetme, öğrenmede sorumluluk alma gibi olumlu yansımaların olduğu sonucuna ulaşılmıştır. Bu olumlu yansımaların yanında merkezi sınavlarda başarısız olunacağı kaygısı ve matematiğin her konusunun bu tür bir sistemle öğrenilemeyeceği kaygısı da olumsuz yansımalar olarak öne çıkmıştır. Bireysel öğrenme Öğrenme stilleri Matematik öğretimi