6.sınıf öğrencilerinde dolaşım sistemi konusunda görülen kavram yanılgılarının giderilmesinde bilgisayar destekli kavram haritalarının etkisi

Bu çalışma PAUBAP tarafından 2009FBE028 nolu Yüksek Lisans tez projesi olarak desteklenmiştir.Bu çalışma, Bilgisayar Destekli Kavram Haritalarının (BDKH) 6. Sınıf öğrencilerinde dolaşım sistemi konusunda görülen kavram yanılgılarının giderilmesine ve kavram haritasına yönelik tutumlarına etkisini Klasik Kavram Haritaları (KKH) ile karşılaştırmak amacıyla yapılmıştır. Bu çalışmada yarı deneysel model kullanılmıştır. Çalışmanın pilot uygulaması 2011-2012 eğitim öğretim yılında Van ilinde bir ilköğretim okulunda yapılmıştır. Asıl çalışma ise 2012-2013 eğitim-öğretim yılında Denizli'nin Çivril ilçesinde, bir ilköğretim okulunda öğrenim gören 56 öğrenci ile yapılmıştır. Bu araştırmada veri toplamak amacıyla, çalışma grubundaki öğrencilere kavram yanılgılarını belirleme aşamasında; "Kelime İlişkilendirme Testi" ve "Yarı Yapılandırılmış Mülakat" uygulanmıştır. Uygulama öncesi gruplara 2 hafta (8 saat) boyunca deney I grubuna Inspiration yazılımı ile kavram haritası eğitimleri verilirken, deney II grubuna klasik kavram haritaları ile ilgili eğitimler verilmiş ve öğrenciler örnek haritalar hazırlamışlardır. Ardından da dolaşım sistemi konusunda her iki grupta hem araştırmacı tarafından hazırlanan hem de öğrencilerin kendi oluşturdukları kavram haritalarından yararlanarak dersler 3 hafta (12 saat) boyunca araştırmacı tarafından sınıf ortamında işlenmiştir. Ders işlemelerinin tamamlanmasının ardından Dolaşım Sistemi Kavram Testi (DSKT) ve Kavram Haritası Tutum Ölçeği (KHTÖ) uygulama öncesi ve sonrası, kalıcılığı ortaya çıkarmak için ise son test uygulamalarından 4 ay sonra DSKT geciktirilmiş son test olarak uygulanmıştır. Verilerin analizinde bağımsız örneklemli t-testi ve eşleştirmeli örneklemli t-testi kullanılmıştır. Araştırmacı tarafından dolaşım sistemi konusuyla ilgili birçok kavram yanılgısı belirlenmiştir. Bu çalışma, dolaşım sistemi konusundaki kavram yanılgıların giderilmesinde ve konunun anlaşılmasında, Bilgisayar Destekli Kavram Haritaları'nın Klasik Kavram Haritaları'na göre daha etkili ve kavram yanılgılarındaki giderilme durumlarında daha kalıcı sonuçları olduğunu kanıtlamıştır. Ayrıca; deney II grubu ve deney I grubu öğrencilerinin tutumlarında anlamlı bir farklılık tespit edilmiştir. Bu fark deney I grubu lehine olmuştur.The aim of this study was to compare the effectiveness of "Computer Assisted Concept Map" (CACM) oriented instruction with "Classic Concept Map" (CCM) oriented instruction on overcoming 6th grade students' misconceptions of circulatory system and also compare their attitudes toward concept maps. In this study, Quasi experimental model was followed because of using the preformed department of the students who designated the experimental I and experimental II groups randomly. Pilot study was performed at primary schools' 64 6th gadre students in Van. This main study was carried out during 2012-2013 at primary schools' 56 6th grade students in Çivril-DENİZLİ. In the study, to collect data "Word Association Test" and "Semi structured interview" were used to determine misconceptions about Circulatory System and before the study, Computer Assisted Concept Maps (CACM) instruction was applied for group I and Classical Concept Maps (CCM) instruction was applied for group II through a period 2 weeks (8 hours). After these instructions, students prepared the examples of concept map types about circulatory system, these concept map and researcher concept map were used to teach circulatory system through a period 3 weeks (12 hours) by researcher. "Circulatory System Concept Test" (CSCT), Attitude Scale towards Concept Map (ASTCM) were devised. Within these tests, CSCT was administered before, right after and four month after instruction, ASTCM was administered before and right after instruction. In analyzing the collected data, independent t test and paired sample t test were used. A lot of misconceptions about circulatory system were determined by researcher. This study proved that instruction through CACM is more efficient than CCM for groups' understanding and overcoming misconceptions in "circulatory system" topics and also, it was elicited there was a clear difference between experimental II groups' and experimental I groups' attitudes toward concept map before and after instuctions in favour of before. But, experimental I groups' differences much more than experimental II groups' differences. This difference has been in favor of the experimental group I

Computer assisted concept maps instruction: Effects on overcoming 6th

The aim of this study was to compare the effectiveness of 'Computer Assisted Concept Map' (CACM)-oriented instruction with 'Classic Concept Map' (CCM)-oriented instruction on overcoming 6th grade students misconceptions of the circulatory system and also to compare their attitudes towards concept mapping. A quasi-experimental model was used with the students assigned randomly to the experimental group I, EGI (N=28) and experimental group II, EGII (N=28). This study was carried out during 2012-2013 with 566th grade students from a primary school in Civril-Denizli-Turkey. The Circulatory System Concept Test (CSCT) and the Attitude Scale towards Concept Map (ASTCM) were administered to the students. The CSCT was administered before, soon after and 4 months after instruction (to experiment groups). The ASTCM was administered before and soon after instruction. Several misconceptions about the circulatory system were identified by the researcher. This study suggests that instruction using the CACM is more efficient than the CCM in facilitating understanding and overcoming misconceptions about the circulatory system. It was also found that there was a clear difference in the attitudes towards concept mapping between groups I and II before and after instruction

DEVELOPMENT AND PRODUCTION OF BREATHABLE ARTIFICIAL LEATHER WITH MICROPORES

Despite the increasing ethical and social opposing views, genuine leather continues to bepreferred due to its air and water vapour permeability. In this study, Poly(vinyl) chloride (PVC)coated fabric, artificial leather, with high air permeability and optimum water vapour permeabilitywas developed as an alternative to genuine leather. Thanks to the formulation and process developedfor the PVC coated fabric, which is normally not air-permeable, a coating with micropores has beenobtained, thus providing a product that is higher than standard products and close to real leather interms of comfort of use. The air permeability, water vapour permeability and micropore structure ofthe developed product were evaluated by comparing it with real leather and standard PVC coatedfabric.</p

Exploring the KERMA, mass stopping power and projected range values against heavy-charged particles: A focusing study on Sm, Yb, and Nd reinforced tellurite glass shields

In present study, the behavior of ytterbium (III) oxide, samarium (III) oxide and neodymium (III) oxide reinforced novel TeO2–B2O3–V2O5 (TBV groups, tellurite-vanadium–boro) glasses groups are investigated against heavy charged particles, on mass stopping power, projected range and KERMA parameters. SRIM and PAGEX codes are used for determination of the mass stopping power, projected range and KERMA parameters in a kinetic energy range of 0–10 MeV. The highest KERMA values of TBV(X) glasses were achieved at 0.6 MeV. Among TBV(X) glasses, the TBVY1.5 sample with the highest material density (i.e. 5.01038 g/cm3) had the highest KERMA value. The TBVY1.5 sample has the lowest projected range values for alpha and protons with the same kinetic energy. The lowest values of mass stopping power were reported for the TBVY and TBVS groups, which had the highest density values among the analyzed glass samples. The TBVY1.5 sample provides the greatest stopping and slowing characteristics for alpha and proton kinetic energies ranging from 0 to 10 MeV. In this case, it can be said that these two glass groups may slow down alpha particles with a certain kinetic energy the most effectively. It can be concluded that TBV(Y) and TBV(S) glass groups might be useful for stopping the alpha, proton and electron particles

Níveis NT-Pro-BNP e resposta ao exercício em pacientes com fluxo lento coronariano

FUNDAMENTO: Os peptídeos natriuréticos são liberados pelo coração em resposta ao estresse da parede. OBJETIVO: As concentrações de NT-Pro-BNP em pacientes com Fluxo Lento Coronariano (FLC) foram avaliadas antes e depois do teste de exercício e comparados com os valores dos controles saudáveis. MÉTODOS: A população do estudo foi de 34 pacientes com FLC [22 homens (64,7%), com idade 51,0 ± 6,2 anos], e 34 indivíduos normais com artérias coronarianas normais [21 homens (61,8%), com idade 53,2 ± 6,6 anos]. As taxas de fluxo coronariano dos pacientes e controles foram determinadas pelo escore TIMI Trombólise no Infarto do Miocárdio (Thrombolysis in Myocardial Infarction). As amostras de sangue foram coletadas em repouso e após o teste ergométrico. RESULTADOS: As concentrações basais de NT-Pro-BNP nos pacientes com FLC foram superiores às dos indivíduos-controle (NT-Pro-BNP: 49,7 ± 14,2 pg/mL vs. 25,3 ± 4,6 pg/mL p <0,0001, respectivamente), e essa diferença entre os grupos aumentou após o teste de exercício (NT-Pro-BNP: 69,5 ± 18,6 pg/mL vs. 30,9 ± 6,4 pg/mL, p <0,0001). No grupo FLC após o exercício, a concentração de NT-Pro-BNP em 15 pacientes com angina foi maior do que aqueles sem angina (76,8 ± 17,8 pg/mL vs. 63,8 ± 17,5 pg/mL, p = 0,041).A concentração de NT-Pro-BNP em 11 pacientes com infradesnivelamento do segmento ST foi também maior do que aqueles sem infradesnivelamento do segmento ST (82,4 ± 17,3 pg/mL vs. 63,3 ± 16,1 pg/mL, p = 0,004). Os aumentos na mediana pós-exercício no NT-Pro-BNP (Δ NT-Pro-BNP) foram maiores no grupo FLC do que no grupo de controle (Δ NT-Pro-BNP: 19,8 ± 7,7 pg/mL vs. 5,7 ± 4,5 pg/mL, p < 0,0001). CONCLUSÃO: Os resultados deste estudo sugerem que pode haver uma ligação fisiopatológica importante entre a gravidade do FLC (microvascular ou disfunção da artéria coronária epicárdica) e o nível de circulação de NT-Pro-BNP em pacientes com FLC