bluuebunny/crossref_metadata_2025 huggingface dataset:
Germinação de sementes e morfologia de plântulas de Encholirium spectabile
Authors: Maia Alves Pimenta Jéssica , Mattos Andrade Teixeira de Souza Wendy , Luiza de Lima Castro Maria , Dos Santos Ferrari Cibele , Vasconcelos Pacheco Mauro
Published: March 2022

Encholirium spectabile é uma espécie que ocorre em afloramentos rochosos no Nordeste brasileiro, em condições de altas temperaturas e déficit hídrico, utilizada como alimento para alguns animais e possui potencial para ser usada em programas de recuperação de áreas degradadas. Visto que grande parte das espécies é propagada via sementes, este estudo teve como objetivo analisar a biometria das sementes, avaliar a germinação em diferentes temperaturas e regime de luminosidade, além de caracterizar morfologicamente as plântulas de E. spectabile. As sementes de E. spectabile foram classificadas como grandes, possuindo uma média de 4,21 mm de comprimento. Devido aos resultados superiores de germinação das sementes submetidas às condições de fotoperíodo quando comparados à condição de escuro, as sementes de E. spectabile podem ser consideradas fotoblásticas positivas. Houve melhor desempenho germinativo quando as sementes foram submetidas às temperaturas de 25 e 30 ºC. A germinação da E. spectabile é do tipo epígea-fanerocotiledonar com emissão radicular no quarto dia após a semeadura e surgimento de plântulas normais no 13º dia.
Flora da Estação Ecológica de Tapacurá, São Lourenço da Mata, Pernambuco - Brasil: Convolvulaceae Juss.
Authors: Alencar Juliana , Santos Diego , Alves Joilson Viana , Buril Maria Teresa
Published: March 2022

A fim de contribuir com o conhecimento da biodiversidade local, este estudo pioneiro na Estação Ecológica de Tapacurá (Pernambuco) tem o objetivo de realizar o tratamento taxonômico das espécies de Convolvulaceae e fornecer subsídios para sua identificação. Vinte e uma espécies foram registradas na área de estudo, distribuídas em sete gêneros, sendo Ipomoea L. o mais representativo (10 spp.), seguido por Distimake Raf. (3spp.), Cuscuta L. (2spp.), Evolvulus L. (2spp.), Operculina Silva-Manso (2 spp.), Camonea Raf. (1 sp.), Jacquemontia Choisy (1 sp.). Apresentamos descrições, chave de identificação, fotografias, comentários taxonômicos e de distribuição geográfica, e períodos de floração e frutificação.
Digital Literacy Perspective: Reflections on Education
Authors: EGUZ Sule
Published: March 2022

Today's society demands more and more different types of skills. These skills need to be used not only to strengthen the capacity to use information for social and personal development purposes, but also to manage potential risks associated with mass media and digital media. As a matter of fact, the rapid development of digital technologies in the digital age confronts individuals with situations that require the use of ever-growing cognitive, sociological and technical skills required to identify and solve problems in digital environments. Individuals who are digitally illiterate or who lack digital literacy face the situation of exclusion from the digital world. Therefore, in today's technology age, being digital literate is an important skill needed in people's workplace and social lives beyond educational institutions. The increased focus on the development of digital literacy should be a policy priority, especially for educational institutions. Because education, which includes the learning and teaching process, is an area where digital media are used. In this study, the concept of digital literacy, the development of digital literacy, strategic perspectives in education, the 'Ng Model' in digital literacy and the use of digital literacy in education have been examined.
Technology in Teaching, as an Empowerment of Innovative Education
Authors: TAHIRI Albana
Published: March 2022

The aim of this paper is to present an overview of the importance of teaching competencies, achieved through use of technology, so that the learning process is perceived as one of the pleasures offered during the process of education. Nowadays, in the pandemic conditions, education is facing great challenges. The education of students from online learning is another challenge, which puts in dilemma the teaching and learning process. We live in an era where teaching process is going through rapid changes, information sources have a wider scope of action and certainly the effects are visible. The implementation of technological innovations in education sector is a new challenge for students and teachers. Transitioning the teaching and learning process from the auditorium to home environment requires professionalism and dedication from the teachers, who should use a different approach to continue developing their academic preparation. Based on this point of view, we have treated the role of education in shaping the student and the society as well, considering the process in the new context, re-dimensioning the relationship between students and teachers, in the new conditions of subjects and inter-subjects' integration, bringing not only a new “face” of the curricula, but also the new role of the teacher in our schools. The global information we face every day is reflected in everyone's language and communication. The purpose of education is to prepare students to understand and actively participate in the process of critical and creative thinking. This study is based on a methodology that includes both quantitative and qualitative aspects. Quantitative, because this research has been extended to several schools in the city of Tirana, through surveys and questionnaires, to emphasize how much these technological innovations are being used in elementary, middle and high education. Qualitatively, the information is summarized through tables and charts.
The Effect of Digital Story-Supported Science Practices on the Scientific Attitudes of 7th-Grade Students
Authors: CALIK Imren , SECKIN-KAPUCU Munise
Published: March 2022

This study aims to examine the effect of supporting science applications courses with digital stories on the scientific attitudes of 7th-grade students. In this study, a quasi-experimental design was used. The study was carried out in the 2020-2021 academic year, during the 7th-grade Science Applications course of a state secondary school affiliated to the Eskisehir Provincial Directorate of National Education. The study sample consisted of 93 students from four branches, 53 male and 40 female, taking the Science Applications course. The lessons were supported by digital stories in the experimental group during the implementation process, whereas the control group followed the current curriculum. The data collection process was completed in six weeks. The scientific attitude scale was applied in the first week of this six-week process as the pre-test. 12 digital stories were used in the second, third, fourth, and fifth weeks. The scientific attitude scale was applied in the last week again as the post-test. Descriptive statistics and t-test for dependent and independent groups were used to analyze the quantitative data obtained from the Scientific Attitude Scale. A significant difference was found between the pre-test and post-test mean scores of experimental and control group students regarding their scientific attitudes, the pre-test-post-test related to the scientific attitudes of control group students, and the pre-test-post-test mean scores of experimental group students' scientific attitudes. As a result of the statistical analysis, it was concluded that digital storytelling positively improved students' scientific attitudes in the applied group.
Social and Individual in the Education Vision of 20th Century - An Analyse of the History Textbooks
Authors: ALEXANDRACHE Carmen
Published: March 2022

Our paper proposes a theoretic approach of the education in Romanian society, especially of the study of history, from the communist regime until nowadays. For this issue, we analyzed the history school textbooks which were edited in 20th century to be used in the secondary and higher schools. The schoolbook is an education tool which has in general a bigger impact to students’ consciousness and behavior. Our study starts from the premise that the schoolbooks have been also an important ideological tool, used by the politic regime to influence the social attitude. As a consequence, the schoolbooks need to be analyzed from the political intentions. The paper proposes some notices focused on the understanding of the vulnerability concept from the political ideology perspective, the evolution of it, as it is reflected by the history schoolbooks speaking about society and individual. For this reason, we think our paper is a real support of the actual theoretical and practical concerns about the modern and equitable social principles. Our notices can contribute to increase the quality of human interactions, to social responsibility and to promote a correct connection between vulnerability and social attitude in actual human society.
Investigation of Secondary School Students' Views on the Distance Education in the Pandemic Process
Authors: BATU Abdulhalim , SECKIN-KAPUCU Munise
Published: March 2022

In this study, it is aimed to reveal the evaluations of secondary school students regarding the distance education process in the pandemic process. For this research, phenomenology, one of the qualitative research designs, was used. 32 students studying in the fifth, sixth, seventh and eighth grades of a secondary school in Diyarbakır participated in the research. In the determination of the students participating in the research, the easily accessible and criterion sampling method, one of the purposeful sampling methods, was used. Students' views on distance education during the pandemic process were collected through a semi-structured interview form developed by the researchers. The interview form consisted of 17 open-ended questions. In the interview form, there were questions about thoughts on the distance education process, distance access opportunities, teaching practices, communication, time, precautions and expectations. Content analysis was used in the analysis of the data. When the findings of the study were examined, the students mostly emphasized that face-to-face education is good and distance education is boring. The students stated that they participated in distance education by using television at home, they found the course content sufficient in teaching practices, they evaluated the communication in the distance education process negatively, and they mostly communicated with their teachers in this process. While the students mostly stated that the course duration is not enough, they expressed the opinion that the broadcasting times prepared for distance education are appropriate. Students stated that they mostly experienced problems related to equipment and materials in this process, and that they solved these problems with the supply of equipment. Students mostly expressed their opinions about external expectations. Among the external expectations, the views on expectations from the teacher were mostly emphasized. In line with the results of the research, suggestions that are thought to contribute to distance education are included. Improvements can be made in internet infrastructure and base stations in rural areas. Internet service can be provided free of charge to all teachers and students through the Ministry of National Education. Different strategies, methods and techniques can be used in teachers' lessons so that students do not get bored with distance education.
A Study on Left-Brain Dominance of the Higher Secondary Students
Authors: NITHYANANTHAM Vinnaras , REGIS X. Vengo
Published: March 2022

This present study intends to find the left-brain dominance of the higher secondary students in Tirunelveli, Thuthukudi, Kanyakumari, and Virudhunagar districts in Tamilnadu, India. In this survey study, the population consists of 2000 higher secondary students of the above-mentioned districts of Tamilnadu, among this population, based on the result, the population was separated by left, middle or moderate and right brain dominant by the instruction of the scoring key. Here, 743 higher secondary students were coming under the left-brain dominance, 135 were in the right brain and 1122 higher secondary students were in middle or moderate brain dominance. In this study, the investigator examined only the left-brain dominance of the higher secondary students. The alert scale of cognitive style by Loren D. Crane (1989) was used to collect the data for this present study, which consists of 21 optional statements. Necessary instructions were given to every student before they asked to do the questionnaire. The scoring was done according to the scoring scheme and the formulated hypotheses were tested using appropriate statistical technical like percentage analysis, and chi-square. The findings indicate that the left-brain dominance of the higher secondary pupils’ level is moderate and there is a substantial association between family income and districts community of the higher secondary students and their left-brain dominance.
Integrating STEM in to TVET Education Programs in QATAR: Issues, Concerns and Prospects
Authors: SAID Ziad
Published: March 2022

Qatar TVET education system faces unique challenges in that the percentage of vocational secondary school students constitute only 1.4% compared to world average of 15% due to the poor perception of TVET as lesser pathway than other academic-based education. This low perception is associated with sociocultural, economic and institutional factors. Another challenge is the poor link between vocational and general education and the link to labor market. Further challenge is how TVET institutions can develop new curricula, which can respond to the needs of the 21st century skills. This paper will discuss how STEM can help promote TVET education and what are the possible changes required to overcome those challenges. A survey on “Improving and enriching the Human Capital of the State of Qatar through Identification and Development of 21st Century Skills”, explored perceptions of both employers and TVET program leaders toward the skills needed for economic and social developments in a changing world by Meeting Human Capital Needs through 21st Century Skills including the perceptions on needed STEM and cognitive skills. A total of 85 managers and professionals (from more than forty establishments) completed the survey, together with 35 TVET program leaders located in one national university and six government TVET institutions together with 32 semi structured interviews. Descriptive statistics analysis showed a major mismatch between the perceptions of TVET program leaders and employers’ managers and professionals in many aspects., employers perceive the social skills as more important while TVET consider mathematical reasoning as more important employers perceive technological skills such as digital literacy as more important than what TVET leaders perceive. This presentation will identify several approaches to integration and discuss the advantages and disadvantages of the approaches employed. The presentation addresses the various planning approaches and resources required to effectively integrate STEM in TVET programs and curricula.
Educational and Cultural Policies of the Karakhanid Period
Authors: AKMAN Ozkan , SAMUR Hayati
Published: March 2022

The fact that the Karakhanid Turks adopted the Islamic faith brought new features to education. One of these innovations was the opening and expansion of institutions called "madrasah" for the first time in Turkish societies and where education was carried out in a certain plan, program and order. Another important feature of this period is that the Turks have passed from the oral culture they continued before Islam to the written culture and they have entered the process of transition from the nomadic society structure before Islam to the fully settled society structure. In these established madrasas, besides religious education such as the Qur'an, kalam and Hadith, medicine, mathematics, astronomy, philosophy, logic, etc. The teaching of the courses also allowed many scientists and thinkers to be trained in this period. In addition, the support of the Karakhanid rulers to such developments caused cities such as Kashgar, Bukhara, Samarkand, Tashkent, and Balasagun to become science-cultural centers in a short time. In this period, the comments and opinions of important scientists and thinkers about education caused a turning point in terms of Turkish education history. The aim of this study is to determine the educational and cultural policies of the Karakhanid period. The research was carried out with content analysis, one of the qualitative research methods. The data of the research was carried out by scanning the relevant literature that sheds light on the Karakhanid Period. The given analysis was done by creating a category with the coding technique. According to the data obtained; The works of Farabi, Ibni Sina, Yusuf Has Hacip, Kaşgarlı Mahmud, Ahmet Yesevi and Edip Ahmet Yuknevi, who are important figures of the Karakhanid Period, and their contributions to science are explained with examples.
Examination of Mothers' Opinions Regarding Children's Digital Playing
Authors: ALINCAK Fikret
Published: March 2022

The first periods of human life are defined as critical periods by educators. The child's recognizing and making sense of the outside world usually starts in this period and the child harmonizes this process through play. Especially in childhood education and development, play is an indispensable part of life for children. While technological developments make life easier in many areas, they sometimes make people addicted. Therefore, with the widespread use of digital games, a computer addiction occurs in society. The aim of this study is to reveal the views of mothers about children playing digital games. The research is a qualitative study. The research group consists of 30 mothers and this study group was determined by the maximum variation sampling method. In the study, face-to-face interview technique was used on a voluntary basis with 10 mothers who have children under 6 years old. In the research, using the interview method, which is one of the qualitative research methods, the data obtained were analyzed by the content analysis method. As a result of the research, mothers see play as a means of entertainment, socialization and education in terms of children's development. In addition, the research group stated that they could not spare time for children due to intense daily working conditions and children tended to digital games. They stated that when digital games are mentioned, they think of computer, telephone and technological games. As a result, mothers stated that digital games affect the development of children negatively and create addiction in children. In addition, it has been concluded that mothers, digital games create a lack of communication in children, keep them away from social life and slow down their social development.
Evaluation of Pedagogical Literacy in Education
Authors: KOCOGLU Erol
Published: March 2022

Pedagogical literacy can be defined as the competence that enables teachers, one of the most important variables of the learning-teaching process, to make knowledge-based decisions in the selection of pedagogical instruments used in their education life. Pedagogical literacy can also be defined as the capacity of understanding and recognizing the role of pedagogy in education by using the pedagogical thinking and decision-making skills of the teacher as a thinking, producing and criticizing individual in solving the problems he encounters in and around the school. It can be said that pedagogical literacy, which is effective in shaping the development and changes of teacher behaviors in the education process, comes to the fore more in education programs that include text applications that students can easily access, together with meaningful and understandable activities in the learning-teaching process. In this study, the concept of pedagogical literacy was evaluated in detail within the framework of pedagogical knowledge and pedagogical content knowledge. In addition, the importance of pedagogical literacy in the educational process was evaluated by the researcher with the support of the literature.
Investigation of Anxiety and Expectations of Physical Education Teacher Candidates on the Teaching Profession
Authors: ALINCAK Fikret , YILDIZ Fatma
Published: March 2022

One of the most important elements of the education system is teachers. The teaching profession is considered as one of the most important professions for the development and progress of a country. Therefore, the attitudes and perspectives of prospective teachers towards the teaching profession are very important. The aim of this study is to reveal the anxiety and expectations of prospective physical education teachers about the teaching profession. Open-ended questions developed by the researcher as a data collection tool were applied to the candidates of physical education teachers. In the research, the data obtained from 20 physical education teacher candidates studying in physical education and sports education by using the interview method, which is one of the qualitative research methods, were analyzed with the content analysis method. As a result, when we look at the anxieties of the physical education teacher candidates, it is seen that they are in general anxiety of not being appointed and that they are in economic anxiety. In addition, prospective teachers participating in the research, regarding their expectations from the teaching profession; It is concluded that they want to be a good teacher in their profession, to prepare a good future for their students, and to contribute to the society where they are located and to lead their development.
Classroom-based and Online-based Evaluation of Students and Comparative Analysis of Their Achievements in both Scenarios
Authors: KUZMANOVIć Vladimir , BALJOšEVIć Sanda
Published: March 2022

The COVID19 pandemic made a significant impact on every aspect of everyday life. Educational systems around the world applied different strategies in fighting the limitations imposed by their governments. Some countries opted to continue normal schooling while applying all epidemic measures, some opted for online schooling, some to tele-schooling and others applied combined regime of schooling. The educational system in the Republic of Serbia in the school year 2020/2021 was organized as a combination of standard classroom-based teaching with all epidemic measures and television-based distance teaching-learning. After the epidemic situation worsened, all schools shifted to online-based distance teaching-learning. In this paper we will explain the student evaluation process in both the combined regime of schooling and in the online distance teaching of mathematics in elementary school “Ujedinjene nacije” in Belgrade, Serbia. Also, we will introduce the mathematics teaching methodology and evaluation methodology applied in both cases. After that, we will compare the student achievements in both classroom-based and online-based evaluation and discuss problems we encountered during the evaluation in both scenarios. Finally, we will draw conclusions on evaluation methodology and obtained results and propose possible solutions to the problems we were faced with.
Adequacy of the Social Studies Curriculum in terms of Cultural Literacy Skills
Authors: EGUZ Sule
Published: March 2022

Being culturally literate means being prone and competent to be sensitive to one's own and others' identities, heritages, and cultures. It is very important for students to learn about other cultures and races in order to avoid unnecessary prejudices. In this sense, cultural literacy is a powerful educational tool used to adopt one's own culture and to develop understanding and respect for different cultures and people. Indeed, cultural literacy can be a window for other students to experience new ways of seeing the world as a rich and complex place. This study aims to reveal the adequacy of the Social Studies Curriculum updated in 2017 in terms of cultural literacy skills. The data of the research, which was carried out by adopting a qualitative research approach, were obtained through document analysis. The data obtained from the research were analyzed in accordance with the document review stages. In this context, seven learning areas within the Social Studies Curriculum were examined in detail.
Individual Seeking Identity in the Digital World
Authors: KOCOGLU Erol
Published: March 2022

At the beginning of the remarkable developments in the 21st century in the world, it can be expressed as the fact that digital applications have become an indispensable part of human life. It can be said that these practices affect human life in two ways, positively and negatively. Societies or individuals with a strong sense of self and identity, who evaluate these practices in terms of individual and social awareness, can see the reflections of many advantages in their lives thanks to these practices. However, it can be stated that the meeting of identity with the digital era offered by the globalizing world influences the thinking system of the individual while questioning the concept of self through these applications throughout his life. It can be said that with the digital age, the individual's distancing from the social environment he / she lives in has both positively and negatively affected the level of self-questioning. In this study, the quest for self-knowledge and recognition of individual, who is under the influence of the digitalized world, has been evaluated. In this study, in which the scanning model was used, the results of the studies conducted similar to the subject of the study were discussed and evaluated. Note: This study is supported by the Scientific Research Projects Coordination Unit of Inonu University with the Normal Research Project coded SBA-2019-1755. As a result of the study, the study subject was evaluated from different angles and striking results were achieved.
Evaluation of Cytotoxic Activities of Disinfectants on Human Healthy Cells
Authors: SIMITCIOGLU Basak , KARAGOZ Isik Didem , KILIC Ibrahim Halil , OZASLAN Mehmet
Published: March 2022

The Covid-19 pandemic, including our country, has affected 34 million people around the world and caused high death rates and still is. One of the most important points in this process is disinfection, and both surface and air disinfectants have been used frequently. Disinfectants, which are extremely diversified in the market, have started to create danger while protecting us from the virus. It is known that the disinfectants used prevent the contagion of the virus, but we do not have clear information about whether they have destructive effects on the healthy cells of the people who use them. Therefore, in our study, it was aimed to determine the effects of hand disinfectants produced by various brands on our healthy cells. In our study, first of all, the most widely used disinfectants were obtained from the market, and then the cytotoxic (lethal) activity of these disinfectants on healthy cells was determined by in vitro MTT ((3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) analysis. As a result of this study, it was observed that apart from the disinfectant containing hypochlorous acid, other disinfectants have cytotoxic activity against healthy human cells. Despite the increasing need during the pandemic process, we recommend that these disinfectant substances, which are put on the market in large numbers and in a wide variety, should be inspected and necessary measures should be taken so that they can be sold after passing through the quality control stages.
Statistical Modelling of the Compressive Strength of Mortar Based on Cement Blended with Mineral Additions by the Method of Experimental Design
Authors: SALAH Bouglada Mohammed , AMMAR Noui , LARBI Belagraa
Published: March 2022

This experimental study aims to study the mechanical behaviour of a mortar based on cement blended with mineral additions (pozzolana, limestone and slag), knowing that the mechanical strength of a mortar is closely related to its composition. The use of the three mineral additions simultaneously, presents a high number of factors affecting the mechanical resistance and requires a very large number of experiments and the obtained data analysis becomes much more complex. In order to optimise the number of tests and to achieve a such satisfactory analysis, a statistical approach known as an "experimental design" was used. The experimental methodology has been established to assess the compressive strength of mortars at 2, 7, 28 and 60 days, by the elaboration of an experimental design for a set of cement mixtures, the level of the three additions (factors), slag, limestone and pozzolana at rates varying from 0% to 35%, provided that a fixed dosage of 35% is maintained for all combinations to form a binary, ternary and quaternary cement in accordance with cement standard requirements CEM II/B. This statistical approach allowed us to evaluate by a numerical analysis the effect of each addition alone as well the meaning of the double or triple interaction resulting from the association of two or three additions at a time. In addition, it has enabled us to establish a representative model that permitted to estimate and predict the mechanical behaviour of any composition in the experimental program with tolerable errors. The obtained results lead to a satisfactory numerical modeling of the compressive strengths, in particular at the age of 28 days, with a trend curve of a an acceptable determined coefficient of R2 equal to 0.87.
Microstrip Patch Antenna System Design for In-Cabin Wireless Communications and Internet Services
Authors: DUNDAR Ozgur , KOYUNCU Batuhan , OZCELIK Hasan
Published: March 2022

Due to the increasing communication requirements, using the internet when air traveling is no longer luxury but it is a necessity. In this paper, a microstrip patch antenna system has been designed which can be used as an access point and provide internet connections at the 5GHz band in the Airbus A321 type of aircraft. The electromagnetic field radiation simulation and positioning of the designed antennas in the aircraft cabin have been performed also. The microstrip antennas have been designed within IEEE 802.11 ac/ax standard. 5GHz WiFi internet service is providing at 5300 MHz (CH 60) center frequency with 4 antennas which FR-4 dielectric material was used. The designed antennas are used as access points and they are connected with a fiber connection. The electromagnetic field radiation of the antennas placed in the cabin was simulated with the HFSS simulation program. As a result of the simulations, these antennas have been observed to be useful.
Gender Classification from Eye Images by Using Pretrained Convolutional Neural Networks
Authors: CIMTAY Yucel , YILMAZ Gokce Nur
Published: March 2022

Automatic gender classification from face images has been a popular topic among researchers for a decade. Feature extraction and classification methods are very important to create a successful automatic classification system. Due to the richness of face image datasets today, many successful machine learning and deep learning methods has been implemented. It is very critical to extract accurate features from the datasets to achieve promising classification scores when traditional machine learning methods are used. However, deep learning models have been designed to extract the features automatically from the raw data directly. This also automatize the feature extraction process besides classification. The hidden and unpredictable feature sets can be explored by the deep neural networks which can increase the classification performance comparing to traditional machine learning methods. Convolutional Neural Networks (CNN) as one of the effective classes of deep models have been adopted by many scientists for solving the gender classification problem. It can solve the problem of the fact that facial cues can change from origin to origin which makes the accurate feature extraction harder. There are several state-of-the art pretrained CNN structures which are very successful for image classification problems. The performance of CNNs is generally higher when the number of the input data is high. However, in this study, the success of the pretrained CNN models is investigated when the data is limited. Considering this fact, in this study, rather than using complete face images, only the one eye image regions with eyebrows are used for the gender classification. The performance results present that the best CNN models are NASNetLarge and Xception models.
Application of Augmented Reality in Music Education
Authors: GUCLU Hatice , KOCER Sabri , DUNDAR Ozgur
Published: March 2022

Music Education has been given in many ways from the past to the present, but the development of technology has been the turning point for this education. The increasing use of mobile devices in recent years has offered people the advantages of using technology in education. 3D applications developed for mobile devices have enabled Augmented Reality (AR) technology to be used in many areas. While the importance of Music Education has been better understood recently, its benefits and necessity continue to be the subject of research by many scientists. Studies have observed that in addition to music education, taking an instrument education contributes to the increasing success of students in other lessons. In this thesis study, musical notation education on the flute was aimed for primary school students, and after the necessary teachings were made, it was ensured that two different music pieces were played over the AR-Flute application.
Quantum Chemical Calculations of 2-Methoxy-4-[(3-p-Methylbenzyl-4,5-Dihydro-1H-1,2,4-Trıazol-5-One-4-YL)Azomethine] Phenyl-2-Methylbenzoate Molecule
Authors: KOTAN Gul , YUKSEK Haydar
Published: March 2022

2-Methoxy-4-[(3-p-methylbenzyl-4,5-dihydro-1H-1,2,4-triazol-5-one-4-yl) azomethine] phenyl-2-methylbenzoate was optimized by using Density Functional Theory (DFT/B3LYP, B3PW91) methods (Frisch et al., 2009; Wolinski et. al., 1990). 1H-NMR and 13C-NMR isotropic shift values were calculated by the method of GIAO using the program package Gaussian G09 (Wolinski et al., 1990). Theoretical and experimental values were inserted into the grafic according to equatation of δ exp=a+b. δ calc. Experimental data obtained from the literature (Yüksek et al., 2018). The standard error values were found via SigmaPlot program with regression coefficient of a and b constants. Furthermore, the veda4f program was used in defining of IR data theoretically (Jamróz, 2004). Theoretically calculated IR data are multiplied with appropriate adjustment factors (Merrick et al., 2007) and the data obtained according to DFT(B3LYP, B3PW91) method are formed using theoretical infrared spectrum. Also, dipole moments, the HOMO-LUMO energy, ΔEg, total energy of the molecule, bond lengths and Mulliken charges, the molecular surfaces such as molecular electrostatic potential (MEP) and MEP contour maps, the total density, the electron density and the electrostatic potential were calculated with same method and functions.
Investigation of Conformation, Vibration and Electronic Properties of 2- Methoxythiophene Molecule by Theoretical Methods
Authors: UGURLU Guventurk
Published: March 2022

In this study, the structural parameters, vibrational frequency, the electronic energy, the dipole moment, the highest occupied molecular orbital (HOMO) energy, the lowest unoccupied molecular orbital (LUMO) energy, the polarizability, hyperpolarizability and the potential energy curves (PEC) of 2-methoxythiophene molecule were calculated at Hartree-Fock (HF) and Density Functional Theory (DFT) with B3LYP (Becke 3 Parameter Lee-Yang-Parr) model using the 6-311++(d,p) basis set in gas phase. The potential energy curves of the molecule were performed as a function the θ[C3-C2-O-C6] torsion angle varying from 0-360º at 10º intervals. The dipole moment value of the molecule was calculated as 1.99 Debye by the DFT/B3LYP/6-311++G(d,p) method and as 2.24 Debye by the HF/6-311++G(d,p) method, respectively. The obtained vibrational wave numbers were scaled with appropriate scale factors and the assigning of these vibrational wavenumbers was made according to the potential energy distribution (PED) using the VEDA 4f program. Also, by using HOMO-LUMO energies, energy gap values, ionization energy, electron affinity, chemical potential, electronegativity, hardness and softness indices were obtained. The approximate geometry of the molecules in three dimensions was drawn in the GaussView 5.0 molecular imaging program, and all theoretical calculations were used with the Gaussian 09W package.
Effect of Secondary Aging of AA7075 Aluminum Alloy to Hardness
Authors: BAKSAN Bedri , CELIKYUREK Ibrahim , TASDEMIR Adem
Published: March 2022

In this study, one of the major aluminum alloys AA7075 was held to obtain the maximum benefit for structural parts. Nowadays for the energy efficiency of vehicles like electric cars or aerospace vehicles weight reducing efforts are needed. To obtain lighter structures specific strengths are gaining importance. In our study, AA 7075 aluminum alloy was processed with additional heat treatment rather than T6 condition to obtain high strength. According to our previous studies, statistical methods seemed very useful to predict probable strength very precisely, for this reason, Box-Behnken Surface Response Method was used. By applying statistical methods, the artificial aging temperature and time were optimized. According to optimized temperature and time, the secondary aging heat treatment was done. In this study three T6 conditions 150, 200, and 250 oC with four treatment times, 1,2,4 and 6 hours were chosen and applied. The secondary aging temperature and time were obtained from Box-Behnken optimization study results and found as 182 oC and 2 hours were applied to all samples. As a result, after secondary aging heat treatment maximum hardness of 151 Hv was obtained from samples that aged at 150 oC, and 250 °C for 1 hour, which is almost doubled because the T6 aged sample has a hardness value of 86 Hv. This is obvious that the strength almost doubled, therefore it is possible to use sections almost half of the T6 condition samples.
Gissmo Failure Modelling for Crashworthiness Analysis Using Different Test Specimens
Authors: TAMER M. Emin , OZGULTEKIN Almila Gulfem , AYDIN Beyzanur
Published: March 2022

The demand for lightweight products to reduce CO2 emissions and high safety requirements is an increasing trend, especially in the vehicle and electrical appliance industry. The use of high-strength steels instead of conventional mild steels by using predictive modeling methods in finite element analysis plays a major role. Moreover, physical full-scale crash tests are time-consuming as well as expensive. Crash tolerance analysis in the finite element environment depends on the accuracy of the damage and the definition of the material model parameters. This study examines the damage model GISSMO-Generalized Increasing Stress State-induced damage model and the onset of fracture was calculated by sample optimization via finite element analysis in this study. This research presents the modeling of a specific region of the material fracture curve using the different geometric samples. The results of the numerical simulations are validated by comparing the experimental data of the optimized test samples with their measurements.
Theoretical (6-311G(d,p)/ 3-21G) and Spectroscopic (13C/ 1H-NMR, FT-IR) Analyses pf 3-Propyl-4-[3-(2-Methylbenzoxy)-Benzylidenamino]-4,5-Dihydro-1h-1,2,4-Triazol-5-One Molecule
Authors: ULUFER-BULUT Songul , KOTAN Gul , YUKSEK Haydar
Published: March 2022

The molecule was studied with the method Density Functional Theory (DFT) using two different the basis sets (6-311G(d,p)/ 3-21G) in the Gaussian 09W program. First, the most stable three-dimensional shape of the molecule was determined with the GaussView5.0 program (Dennington et al., 2009). Based on the structure of this optimized molecule,"spectroscopic properties"(FT-IR, 13C/ 1H-NMR), the electronic properties (electron affinity (A), ionization potential (I), electronegativity (χ), chemical hardness and softness, electrophilic and nucleophilic index), HOMO-LUMO energies and ΔEg energy, the geometric properties (bond length and angle) ve the thermodynamic properties (thermal energy (E), thermal capacity (CV), entropy (S)) were calculated with DFT/ 6-311G(d,p) and 3-21G. In addition, the total energy of the molecule, mulliken atomic charge values, dipole moment, molecular electron potential (MEP), total density and contour surface maps were determined. The electrophilic and nucleophilic regions of the structure were confirmed. Theoretical calculations of 13C/ 1H-NMR isotropic shift values were performed in gas phase and solvent (DMSO) acording to GIAO method and regression analyzes were by compare with experimental values of computational data. R2 values were calculated and regression graphs were created. FT-IR (Infrared) vibration frequency values were calculated from the Veda4f program. The theoretical vibration frequency values were compared with the experimental IR values. Experimental data obtained from the literature.
Determination ARIMA Model for the Discharge Acid Concentration in Pressure Oxidation Autoclave at A Gold Processing Plant
Authors: TASDEMIR Adem , CELIKYUREK Ibrahim , BAKSAN Bedri
Published: March 2022

During industrial production, many quality parameters of products are measured to evaluate the quality of final products. These investigations are also applied for the machine parameters to control if they work properly. A huge amount of data is collected, recorded, and evaluated for these aims. Time series analyses are often a useful tool to evaluate the industrial data to analyze the products quality parameters or machine performances. The autoregressive integrated moving average (ARIMA) time series models are the most known and used method. One of the most important advantages of ARIMA models is its capability of near future estimation for the monitored process variable. For this aim, current research is carried out at a gold processing plant data. The plant gains the gold by applying the modern pressure oxide leaching in autoclave and cyanide leaching. Since the gold ore characteristics can be changed even, they are mined in the same mining area, monitoring the product quality and machine performances during production stages are needed. In this research, the data set, which was recorded at equal sampling time intervals and obtained in a month, is supplied from a gold processing plant in Turkey. During the gold production, the ground gold ore is subjected to the desulphurization process by pressure oxide (POX) in the autoclave. Discharge acid concentration is critical in this process and it is followed regularly by taking samples in 2 hours’ time intervals in 24 hours. Using discharge acid concentration data set, the ARIMA (1,0,1) time series model was determined to monitor it. Also, near-future values of acid concentration were estimated by the ARIMA (1,0,1) model and compared with the real discharge acid concentrations. It was determined that there was a very good agreement between the estimated values obtained by the ARIMA (1,0,1) model and real values.
Effect of Secondary Aging of Copper-Chromium Alloys to Electrical Conductivity
Authors: BAKSAN Bedri , CELIKYUREK Ibrahim , TASDEMIR Adem
Published: March 2022

Copper-chromium alloys are the most important spot-welding tips and disks; it is also used where high strength together with electrical conductivity is required. Electrical conductivity is also important for optimum energy consumption. It is obvious that if highly conductive materials are used, we need low electric current where today energy is a very precious thing. In our study due to the industrial requirement of highly durable and more consistent parts needs, secondary aging was used to obtain more efficient materials. Electrical conductivity is a must, therefore the copper chromium alloys were observed for their resistances for various processing conditions, like as cast, aged, and secondarily aged. The electrical resistance measurements for all conditions were done and compared. The aging heat treatment was done at 650 oC for 4 hours. Secondary aging heat treatment was done at 400 oC for 2, 4, and 6 hours. The lowest specific electrical resistivity was obtained from secondary aged at 400 oC for 2 hours as 0.0074 mΩ mm2/mm. The resistance of as-cast copper-chromium alloy was measured as 0.078 mΩ mm2/mm which is almost ten-fold resistive than secondarily aged sample therefore it can be said that the secondary aging heat treatment was found to have a favorable electrical conductance.
Evaluation of an Event Detection Algorithm for Russian and Kazakh Languages
Authors: MUSSINA Aigerim , AUBAKIROV Sanzhar , TRIGO Paulo
Published: March 2022

The Event Detection area is gaining increasing interest among researchers. The social media data growth induces the emergence of new algorithms along with the improvement of existing solutions. In this paper we propose to improve of existing algorithm for event detection, SEDTWik (Segment-based Event Detection from Tweets using Wikipedia). The authors define event as a set of similar segments of words within a given time window. A segment is defined as a word or phrase taken from the analyzed text data. The SEDTWik uses Wikipedia as a “supervisor” to identify the segments, to calculate the segments’ bursty value and to calculate the segments’ newsworthiness. We examined the SEDTWik algorithm using our data from Telegram online social network. The overall network message construction of Twitter is different from that of Telegram. Therefore, we transformed the Telegram meta-data to fit the SEDTWik requirements. Another much relevant difference in our experiment lies in the fact that our corpora contain messages in Russian and Kazakh languages. Our results show that the SEDTWik algorithm is strongly dependent on the broad and unfocused Wikipedia data. Such dependency was shown to have a loss effect on the event detection accuracy. This result founds our motivation to improve the SEDTWik algorithm using dynamically calculated segment probabilities from the analyzing data streams.
Adaptable Fiber Laser Control Unit
Authors: COMANESCU Brindus , SCHIOPU Paul , VLADESCU Marian , ILIESCU Mihaiela
Published: March 2022

Today fiber laser is widely used due to their performances and flexibility. They replace old types of lasers in the industrial machines. To develop a family of laser machines it is the need of having standard laser source that could efficiently be used and replaced in the equipment, independently of the laser source or types of lasers. This paper presents the concept and development of a new fiber laser control unit developed to be used for CW, QCW or pulsed regime. Control unit could be used in multiple laser source and satisfy complex requirements. The control unit of the fiber laser source is able to be used in a different type of fiber laser like: Yb doped fiber, Erbium fiber, thulium fiber. Control unit is designed to be used direct or with minimum modifications in different laser processing applications like: marking, engraving, cutting, drilling, welding, etc. Main parameters of control unit are: 3 working regime, frequency - 1 KHz (QCW), frequency in pulsed regime : 15KHZ - 500 KHz, control seed laser, control pre amplifier and amplifier. Control unit allows commands for machine control: start/stop, interlock, system ready/ fault.