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Uses of cone-beam computed tomography in San José, Costa Rica
Barba, Lucia,Berrocal, Ana Luisa,Hidalgo, Alejandro Korean Academy of Oral and Maxillofacial Radiology 2018 Imaging Science in Dentistry Vol.48 No.2
Purpose: To analyze cone-beam computed tomography (CBCT) use, indications, and exposure parameters in San $Jos{\acute{e}}$, Costa Rica. Materials and Methods: A cross-sectional study was performed. All CBCT examinations over a period of 6 months at 2 radiological centers in San $Jos{\acute{e}}$, Costa Rica were evaluated. The examinations were performed with Veraview EPOC X550 and Veraviewepocs 3D R100 equipment. The patients' age and sex, clinical indication for CBCT, region of interest (ROI), repeat examinations, specialty of the referring dentist, field-of-view (FOV), tube voltage (kV), tube current (mA), and radiation dose (${\mu}Gy$) were evaluated. Patients were classified by age as children (${\leq}12years$), adolescents(13-18 years), and adults(${\geq}19years$). Results: The mean age of the 526 patients was 49.4 years. The main indications were implant dentistry and dental trauma. The most frequent ROIs were posterior, while anterior ROIs were much less common. The highest percentage of repeat examinations was in children. Fifty-six percent of the referring dentists were specialists. The most commonly used FOV was small. The mean tube voltage and current were 79.8 kV and 7.4 mA for Veraview EPOC X550 and 89.9 kV and 6 mA for Veraviewepocs 3D R100, respectively. The mean doses for children, adolescents, and adults were $6.9{\mu}Gy$, $8.4{\mu}Gy$, and $7.8{\mu}Gy$, respectively. Conclusion: Although CBCT was most commonly used in adults for implant dentistry, most repeat examinations were in children, and the highest mean dose was in adolescents. Additional dose optimization efforts should be made by introducing low-dose protocols for children and adolescents.
The Use Of Elements Of Innovative Pedagogical Technologies In Educational Activities
Barba, Ihor,Riazantsev, Lev,Koturha, Oleh,Poliakov, Serhii,Bondarets, Nadiia International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.12
The article considers the position of scientists on the concept of "pedagogical technology", identifies the signs of pedagogical technology and existing classifications, considers non-traditional (innovative) learning technologies, as well as their practical forms of application in the educational process, summarizes the results, makes recommendations for the practical application of the studied material. The article considered the basic concepts of pedagogical technology, as well as some types of non-traditional (innovative) teaching technologies. Also, examples of the use of some elements of innovative technologies in practical educational activities are given. The choice of specific non-traditional pedagogical technologies is determined by the target orientation, content specificity, individualization of training, technical equipment of the educational institution, etc.
A Look at Teacher Candidates` Measurement and Geometry Abilities
( Patton Barba ),( Le Sage-clements Teresa ) 한국수학교육학회 2011 수학교육 학술지 Vol.2011 No.2
Teacher Candidates enrolled in a math or science methodology classes completed a brief survey determining their ability in measurement and geometry. Questions were modeled after the released fifth grade questions on the state achievement exam. Data revealed these teacher candidates need additional training prior to entering the classroom as teacher-of-record.
Using "Guess My Number" Problems to Analyze Algebraic Thinking
( Patton Barba ),( De Los Santos Estella ) 한국수학교육학회 2011 수학교육 학술지 Vol.2011 No.2
Four “Guess My Number” problems were used to assess seventh and tenth students` knowledge of numeric, visual and algebraic representations. Seventh-grade students scored significantly higher on visual. There were no significant differences on numeric and algebraic. Researchers believe semi-concrete and visual models may provide link between numeric and algebraic concepts.
Mastering Fractions : Using Real-life Models
( Patton Barba ) 한국수학교육학회 2011 수학교육 학술지 Vol.2011 No.1
Fourth grade students have been introduced in their earlier classes to fractions however, fractions create many problems. One of the biggest obstacles is the students do not at this age (Piaget) have the ability to think abstractly about what a fraction (i.e. ½) actually represents. Many of the textbooks and classroom teachers revert to the method by which they were taught. It is the memorization without understanding. The study taught the students with real-life models. Teachers reported that the students developed a better foundation using these models and were able to exhibit conceptual learning of fractions several months later.
Using Motivational Techniques, Students can Learn Mathematics is Useful
( Patton Barba ) 한국수학교육학회 2011 수학교육 학술지 Vol.2011 No.2
Mathematics is often thought of a necessary evil. Being a successful teacher can be very difficult as students arrive unwilling to try many concepts. Using motivational techniques, students can learn math is useful and sometimes even fun. Motivation helps to remove fear/anxiety thus helping most students to be successful.
Scientific Notation is like a Foreign Language to Many Students
( Patton Barba ) 한국수학교육학회 2012 수학교육 학술지 Vol.2012 No.1
A multi-case study investigating teaching scientific notation to seventh grade students. There were four students in the multi-case study. They were all in different math and science classes at their respective school, however, they all attended schools within a single district in the southern part of the United States. The students were given a hands-on activity utilizing practice golf balls, dried beans, pair of tweezers (forceps) and grains of salt prior to being given instruction on converting number to scientific notation. All mastered converting to scientific notation during the study and were still fluent with the concept five years later.
Proving are you Smarter than a Fifth Grader : Measurement 101
( Patton Barba ) 한국수학교육학회 2012 수학교육 학술지 Vol.2012 No.1
Teaching online classes are always a challenge to keep the students` interest as well as be sure all concepts are received in a successful way. As a spinoff of the TV show, ‘are you smarter than a fifth grader` a survey of 12 questions was given to 57 teacher candidates. The questions were modeled after released 5th grade measurement questions found on the internet. Rationale of requirement for each question along with analysis of the results is share in the article. Teacher candidates were successful although not 100% as hoped.