Teachers' Attitudes Toward the Use of Technology in Social Studies Teaching

Technology integration in education is one of the most popular topics in the last decades. Many countries have invested millions of dollars to equip classrooms with technological devices. As well as developed countries, Turkey has conducted several projects to provide technological devices and educational materials to classrooms. Technology has the potential to increase the quality of learning and teaching process. However, having technological devices in classroom alone will not cause the increase of the quality of education. Thus, the purpose of this study is to examine teachers' attitudes toward the use of technology in social studies teaching. Understanding social studies teachers' attitudes is essential because it is a way to figure out how they integrate technology and define barriers. The authors applied quantitative survey method and used cluster sampling to choose participants. The sample of the study consisted of 155 social studies teachers who are currently teaching at middle schools. The use of technology in social studies teaching attitude scale was used to collect data. The findings revealed that teachers have positive beliefs and attitudes toward the use of technology. Also, the findings showed that teachers who are working at private schools have significantly high attitudes than others who are teaching at public schools. Moreover, teachers who took educational technology and teaching material course and attended in-service training have more positive attitudes than others

Skin manifestations following anti-COVID-19 vaccination: A multicentricstudy from Turkey

Purpose: After the emergence of the pandemic caused by the COVID-19 virus, vaccination with various vaccines has started to be implemented across the world. To identify dermatological reactions developing after the COVID-19 vaccines administered in Turkey and determine their clinical features and risk factors that may play a role in their development. Materials and Methods: The study included patients aged ≥18 years, who presented to 13 different dermatology clinics in Turkey between July 2021 and September 2021 after developing dermatological reactions following the administration of the COVID-19 vaccine. After providing written consent, the patients were asked to complete a standard survey including questions related to age, gender, occupation, comorbidities, the regular medication used, the onset of cutaneous reactions after vaccination, and localization of reactions. Dermatological reactions were categorized according to whether they developed after the first or second dose of the vaccine or whether they occurred after the inactivated or messenger RNA (mRNA) vaccine. The relationship between dermatological reactions and some variables such as gender and comorbidities was also evaluated. Results: A total of 269 patients [116 women (43.1%), 153 men (56.9%)] were included in the study. It was observed that the dermatological diseases and reactions that most frequently developed after vaccination were urticaria (25.7%), herpes zoster (24.9%), maculopapular eruption (12.3%), and pityriasis rosea (4.5%). The rate of dermatological reactions was 60.6% after the administration of the mRNA vaccine and 39.4% after that of the inactivated vaccine. There was a statistically significantly higher number of reactions among the patients that received the mRNA vaccine (p = 0.001). Conclusion: The most common reactions in our sample were urticaria, herpes zoster, and maculopapular eruption. Physicians should know the dermatological side effects of COVID-19 vaccines and their clinical features

Baryum hekzaferrit seramiklerinin ve baryum hekzaferrit polimer matris kompozitlerinin manyetik ve elektromanyetik karakterizasyonu.

In this study, BaHF-based polymer matrix composites were prepared as potential EM wave absorbing materials. Firstly, BaHF powders and platelets were synthesized by mixed oxide method and by molten salt synthesis (MSS) technique, respectively, which were further used as additives in the EM wave absorbing composites. The effect of molten salt composition on the amount of BaHF phase formation, as well as, on the morphology and magnetic properties of the final products were discussed according to the characterization results. Quantitative XRD results showed that with the increase in NaCl flux content, BaHF formation was enhanced and the highest conversion (97.8 wt%) was obtained in the case of 100 wt% NaCl flux. Corners of the BaHF platelets in NaCl flux were rounded, while KCl flux produced sharp edge platelets. Increasing NaCl content in the flux improved the coercivity and remnant magnetization of BaHF, leading to a more pronounced hard magnetic behavior. vi In the second part of the study, BaHF-based polymer matrix composites were prepared by tape casting method, and their electromagnetic wave absorption potentials were investigated within 18-40 GHz frequency range by free-space measurement method. Effect of BaHF content and alignment on the EM wave properties was investigated. To enhance the EM wave absorption potential of the resulting composites, graphite or nickel flakes were incorporated into polymer matrix, and multilayered composites were produced. BaHF-Ni flake containing composites revealed 50-75% EM wave absorption in 18-40 GHz range with the synergistic effect of the magnetic and ohmic loss effective in the structure.M.S. - Master of Scienc

Mesoporous silica-based bioactive glasses for antibiotic-free antibacterial applications

Bioactive glasses (BGs) are being used in several biomedical applications, one of them being as antibacterial materials. BGs can be produced via melt-quenching technique or sol-gel method. Bactericidal silver-doped sol-gel derived mesoporous silica-based bioactive glasses were reported for the first time in 2000, having the composition 76SiO2-19CaO-2P2O5-3Ag2O (wt%) and a mean pore diameter of 28 nm. This review paper discusses studies carried out exploring the potential antibacterial applications of drug-free mesoporous silica-based BGs. Bioactive glasses doped with metallic elements such as silver, copper, zinc, cerium and gallium are the point of interest of this review, in which SiO2, SiO2-CaO and SiO2-CaO-P2O5 systems are included as the parent glass compositions. Key findings are that silica-based mesoporous BGs offer a potential alternative to the systemic delivery of antibiotics for prevention against infections. The composition dependent dissolution rate and the concentration of the doped elements affect the antibacterial efficacy of BGs. A balance between antibacterial activity and biocompatibility is required, since a high dose of metallic ion addition can cause cytotoxicity. Typical applications of mesoporous BGs doped with antibacterial ions include bone tissue regeneration, multifunctional ceramic coatings for orthopedic devices and orbital implants, scaffolds with enhanced angiogenesis potential, osteostimulation and antibacterial properties for the treatment of large bone defects as well as in wound healing

Formation Kinetics, Morphology and Magnetic Properties of BaHF Ceramics Synthesized in x wtNaCl- (100-x) wt KCl Molten Salts

Micron size barium hexaferrite (BaHF, BaFe12O19) platelets were prepared by molten-salt synthesis method in various weight proportions of NaCl-KCl salt mixtures as the liquid medium. The effects of calcination temperature and molten salt composition –x wt% NaCl and (100-x) wt% KCl-on the formation kinetics and amount of BaHF phase formation as well as on the morphology and magnetic properties of the final products have been discussed. Inductively coupled plasma-mass spectroscopy (ICP-MS) was used to determine the solubility of the starting materials in the salts to understand the formation mechanism of BaHF. X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) were used to identify the characteristics of the synthesized BaHF platelets. ICP-MS analysis showed that Fe2O3 solubility is negligible, while BaCO3 has very high solubility in both molten KCl and NaCl. Quantitative XRD results showed that the usage of the molten salt containing 100 wt% NaCl results in the highest amount of conversion to BaHF at 900°C in 2 hours. On the other hand SEM results showed that KCl rich molten salt concentrations led to the formation of proper platelet morphology with sharp corners, while NaCl rich ones resulted in smoother platelet shapes. Flux compositions containing 70 to 90 wt% NaCl have led to the largest average platelet size. According to the magnetic measurements, as the content of NaCl in the molten salt increases, hysteresis loss of the ceramics become pronounced pointing out to the achievement of a more hard magnetic behavior in the synthesized BaHF ceramics. The magnetic saturation values of the synthesized ceramics change around 55 emu/g for all the flux compositions, where the highest saturation value is obtained with 44 wt% NaCl, which is 56.5 emu/g. The highest magnetic coercivity values were obtained with 90 wt% NaCl-10 wt% KCl and 100 wt% NaCl flux compositions. In conclusion, the results obtained from the experiments have shown that the composition of the NaCl-KCl molten salts plays an important role on the extent of BaHF formation, along with resulting platelet morphology and magnetic properties

A Rare Case Report: A Malignant Histiocytic Tumor in the Form of Ovarian Mass

Histiocytic cell malignancies are very rare. Hence, the information about this disease in hematology is limited. In this case report, we present a case of malignant histiocytic tumor affecting the ovary of a 40-year-old virgin female. Primary ovarian malignancy was not considered for the patient who was approached as if she had ovarian malignancy, since there was an indication of a mass in the ovary. Therefore, an aggressive surgery was not performed. Since our patient was in the reproductive age, fertility-preserving surgery was performed. Our patient was then treated systemically by medical oncology. In conclusion, the rare malignancy group was investigated in the present study along with an evaluation of the current literature

İstiklal Marşı yarışması ve Arif Raşit Usman

Ankara : İhsan Doğramacı Bilkent Üniversitesi İktisadi, İdari ve Sosyal Bilimler Fakültesi, Tarih Bölümü, 2017.This work is a student project of the The Department of History, Faculty of Economics, Administrative and Social Sciences, İhsan Doğramacı Bilkent University.by Ünsal, Mehmet Süha

Rapid turnaround fabrication of peptide nucleic acid (PNA)-immobilized nanowire biosensors by O2-plasma assisted lithography of e-beam resists

Nucleic acid-based biosensors are useful to precisely detect genetic footprints at low concentrations with high specificity and selectivity. Among various sensing modalities, approaches based on direct electrical measurements offer advantages in label-free detection, portability for point-of care analysis, and direct integration with electronic readout circuits facilitating data processing, transfer and remote interpretation. In this work, we demonstrate a novel fabrication approach which couples conventional optical lithography and oxygen plasma-based etching with high-resolution electronbeam lithography to rapidly pattern poly(methyl methacrylate) (PMMA) e-beam resist at varying feature sizes (i.e. both large and small device areas), which would otherwise require extremely long exposure durations up to days with standalone e-beam lithography. This allows fabrication of realistic biosensor chips in arrayed format, co-integrated with millimeter (mm)-scale electrical peripherals to nanoscale (nm) sensing elements utilizing a simple and high-throughput process. The feasibility of the approach is demonstrated by successful immobilization of thiol-functionalized peptide nucleic acid (PNA) probes on ∼ 60 nm-wide gold nanowires (AuNWs) enclosed in an SU-8 fluidic reservoir. Fabrication of biochips and self-assembly of PNA probes are characterized by optical microscope imaging, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier-transform infrared spectroscopy (FTIR)

Spontaneous Ovarian Hyperstimulation Syndrome with FSH Receptor Gene Mutation: Two Rare Case Reports

Development of ovarian hyperstimulation syndrome (OHSS) is very rare in a spontaneous ovulatory cycle and it is usually seen during pregnancy. In the etiology of OHSS, higher hCG (molar pregnancies or multiple pregnancies) and thyroid-stimulating hormone (TSH) levels have been accused. In recent years, some follicle-stimulating hormone (FSH) receptor (FSHR) gene mutations have been described in patients with OHSS in the first trimester with normal hCG levels. Herein, we report two cases of FSHR gene mutation during the investigation of the etiology of spontaneous OHSS. Although OHSS is typically associated with ovulation induction, it should be kept in mind that this condition may also develop in spontaneous pregnancies