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The gap between expectations and reality: integrating computers into mathematics classrooms
Bu¨ lent Gu¨ven 서울대학교 교육연구소 2009 Asia Pacific Education Review Vol.10 No.4
As a result of dramatic changes in mathematics education around the world, in Turkey both elementary and secondary school mathematics curriculums have changed in the light of new demands since 2005. In order to perform the expected change in newly developed curriculum, computer should be integrated into learning and teaching process. Teachers' beliefs play a key role in this integration process. Negative beliefs against using computer in mathematics teaching may lead to failure of this process. With the help of this study, it is aimed to detect mathematics teachers' beliefs concerning Computer Assisted Mathematics Instruction (CAMI). Within the scope of this aim, the conducted questionnaire (The opinions of teachers about using computer in Mathematics Instruction) has been carried out on 91 mathematics teachers in the city of Trabzon. The acquired results have shown that mathematics teachers have developed negative opinions against CAMI. This state has revealed that there is a huge inconsistency between curriculum's positive expectations arising from computer usage and teachers' convictions.
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Buğra Aykenar,Nedim Çekmen 대한치과마취과학회 2022 Journal of Dental Anesthesia and Pain Medicine Vol.22 No.6
Glycogen storage disease (GSD) is a group of inherited disorders, which result in the deficiency of enzymes involved in glycogen metabolism, leading to an accumulation of glycogen in various organs. Deficiency of amylo-1-6-glicosidase (debranching enzyme) causes glycogen storage disease type III (GSD III). The main problems that anesthesiologists face in patients with GSD III include hypoglycemia, muscle weakness, delayed awakening due to abnormal liver function, possible difficulty in airway, and cardiomyopathy. In the face of these difficulties, airway preparation and appropriate glucose monitoring and support during the fasting period are important. The doses of the drugs to be used should be calculated considering the increased volume of distribution and decreased metabolic activity of the liver. We present the case of a child with GSD IIIa who underwent dental prosedation under general anesthesia. She was also being prepared for liver transplantation. This case was additionally complicated by the patient’s serious allergic reaction to eggs and milk.
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A rare case of shingles after COVID-19 vaccine: is it a possible adverse effect?
Saliha Buşra Aksu,Güzin Zeren Öztürk 대한백신학회 2021 Clinical and Experimental Vaccine Research Vol.10 No.2
Coronavirus disease 2019 (COVID-19) exhibit mild to moderate symptoms, whereas 15% of COVID-19 cases progress to pneumonia, some associated cutaneous findings are also reported as maculopapular eruptions, morbilliform rashes, urticaria, chickenpox-like lesions, and livedo reticularis. The inactivated COVID‐19 vaccines are authorized for use in some countries including Turkey. Here, we report an unusual case of varicella-zoster virus (VZV) reactivation in a 68-year-old male patient who was vaccinated against COVID-19. The patient presented to family medicine clinic with a stinging sensation and pain radiating from the right side of his chest to his back. Physical examination revealed multiple pinheaded vesicular lesions upon an erythematous base occupying an area on his right mammary region and back corresponding to T3–T5 dermatomes. He reported that he got his second dose of COVID-19 vaccine 5 days ago. As COVID 19 decreases the cell-mediated immunity, it could also increase the risk of herpes zoster (HZ). Although the exact reason remains unsolved, vaccine-induced immunomodulation caused by live attenuated vaccines and attenuated alloreactivity caused by inactivated vaccines may be responsible mechanisms for the reactivation of HZ. Epidemiological studies are needed to clarify the possible connection between vaccination and reactivation of herpesvirus infections.
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망간과 코발트 혼합산화물의 전해방법 및 활성도에 관한 연구
康富夫,金德默 단국대학교 대학원 1988 學術論叢 Vol.12 No.-
Mixed oxides containing cobalt oxides in electrolitic manganese dioxide have been prepared by on electrochemical process on titanium anode and cathode with manganes nitrate and cobalt nitrate solution. These oxides have been prepared in various electrolysis conditions current density, bath temperature, and Mixing Ratio. According to there results, current efficiency was excellent in low current density and high bath temperature, and there mixed oxides were superior to IC Sample Activity percentage value of these oxides has heigher value than one of IC Sample. By X-ray diffraction pattern, when low current density, crystal structure is homogeneous and discharge capacity is excellent.
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金德默,康富夫 단국대학교 1987 論文集 Vol.21 No.-
The discharge reaction mechanism of the Leclanche cells was studied. The cell were discharged through flash light continuously. Discharge products were examined by chenical analysis and X-Ray diffraction. The discharge reaction product was MnOOH in a homogeneous solid-phase reaction. The X-Ray diffraction evidence on the single phase reduction of MnO^2 to MnOOH were presented. The products of these discharge reactions will be dependent on the kinds of Manganese Dioxide, electrloytes, potentials, and depth of discharge.
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徐富一,金先熙 대한본초학회 1997 大韓本草學會誌 Vol.12 No.1
The results of Prunellae Spica on immune response and anti-allergic reaction were as follows. 1. In Prunellae Spica group, hemagglutinin titer and hemolysin titer were increased in comparison with control group. But the results were not recognized as having significance. 2. The number of Plaque forming cells were increased in case of Prunellae Spica. But the results were not recognized as having significance. 3. The number of Rosette forming cells were increased in case of Prunellae Spica group, and the results were significant. 4. In experimentation of phagocytic activity in peritoneal exudate cells and monolymphocytus cells, Prunellae Spica group showed increase. But Prunellae Spica group in spleen cells showed decrease on the contrary. But these results were not recognized as having significance. 5. In Prunellae Spica group, results of PCA response were increased in case of 2 week, 4 week, 6 week on the contrary. 6. In experimentation on histamine contents, Prunellae Spica group showed derease at all agent contact. But these results were of no importance. From above these results, Prunellae Spica group showed good effects on immunoreaction. And Prunellae Spica group showed effects on anti-allergic reaction Ⅰ.
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Pd/ZrO_2계 촉매상에서 Ethylene, Cis-2-Butene Cyclohexene의 수소화 활성의 비교에 관한 연구
李富永 慶尙大學校 기초과학연구소 1985 基礎科學硏究所報 Vol.1 No.-
The hydrogenation of smaller alkenes, ethylene and cis-2-butene on dispersed palladium were studied in pressure range of 10-40 torr at temperatures between 251 and 283K. The amount of dispersed Pd on the ZrO_2 was varied from 0.03 to 2.1 weight percent. The reaction order with respect to hydrogen and ethylene pressure were showed to 0.78±0.02 and 0.66±0.02, respectively and the activation energy E_a, was estimated at 47±2kJ/mol. The kinetic parameters for cis-2-butene hydrogenation was similar to those values for hydrogenation reaction of ethylene. The deuterium distribution in ethylene and ethane molecules in the reaction with D_2 suggested in the hydrogenation on Pd/ZrO_2 proceeds via the associative mechanism; the slow step is assumed to be reaction of surface ethyl radical with the adsorbed hydrogen atom. The hydrogenation activity of those alkenes, V_g, per unit of weight of Pd dispersed on ZrO_2, exhibited same sharp maximum at 0.05wt%, but at this point, the turn-over frequency(N_t) value for ethylene increased drastically to be 65 times, larger than that for cyclohexene and, in the case of cis-2-butene, the value increased by a factor of 3 at 251 K. By comparing these resulting parameters for the reactions, it was concluded that the large differences in N_t were attributed to those in the densities of peculier active site-facet (210) and/or (100) planes-available for those reactions and the different steric-hindrance of reactants was supposed to contribute in producing these differences.
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