Обучение по природни науки и върхови технологии

2019/4, стр. 431 - 444

CHEMOMETRIC ANALYSIS OF SCHOOL LIFE IN VARNA

Резюме:

Ключови думи:

1,2Radka Tomova, 1Petinka Galcheva, 1Ivajlo Trajkov,
3Antoaneta Hineva,
4Stela Grigorova, 5Rumyana Slavova, 6Miglena Slavova
1Konstantin Preslavski University of Shumen (Bulgaria)

2Medical University – Pleven (Bulgaria)

3High School of Mathematics “Doctor Peter Beron” – Varna (Bulgaria)

4High School of Commerce “Georgi S. Rakovski” – Varna (Bulgaria)

5Fifth Language School “Joan Exarch” – Varna (Bulgaria)

6Institute of Electrochemistry and Energy Systems – Bulgarian Academy of Sciences (Bulgaria)

Introduction

A school’s good atmosphere is a basis for increasing the educational quality, as it is a premise for the students’ positive attitude towards their school (Tomova et al., 2014; Boyd et al., 2009). The relationships between students, as well as these with their teachers, are an important characteristic of the life within a school (Görsev, 2010; Telli et al., 2010; Vahedi, 2010). The evaluation of the learning environment is a significant factor in the evaluation of curriculums (Genn, 2001). Organising group assignments in class contribute to the formation of friendships between students and turn school life into an enjoyable experience. The belief that students are in a team with their teacher strongly motivates them to attend class (Akinoğlu & Tandoğan, 2007). The feedback from students is undoubtedly important in order to monitor their opinions about the curriculums and the educational methods, the pedagogical approaches of instilling a spirit of cooperation, the relationships between students and their teachers. The systematic use of questionnaires would help indicate the problematic areas in the learning environment, in order for steps to be taken for their correction (Hoad-Reddick & Theaker, 2003; Aldridge et al., 2012). One aspect of the questionnaire would be monitoring whether current teaching practices are used, which can serve as an evaluation of the teachers’ activities. For instance, although a big portion of Bulgarian teachers know and praise the opportunities created by problem-based learning, few of them apply it, due to the high amount of preparation it requires, and due to the need of significant changes in the perception of a class in order for it to be applied (Tafrova-Grigorova, 2010). This constructivist approach for active learning is undoubtedly effective, as it encourages the acquisition of new knowledge based on knowledge acquired in previous classes. It requires from students to be involved in activities that stimulate them to ask questions, to research, and to solve problems; which eventually leads them to the answers of real life problems (Overton, 2007; Hmelo-Silver, 2004). However, the testing of this learning approach requires feedback, in order for it to be appropriate to students’ age and study level. The social differences between students are a stress factor which has serious implications on a school’s educational environment. Under stress, students are more prone to perceiving the environment as negative, which decreases their motivation for attending classes (Maul, 1980).

The use of a specific questionnaire is especially important for teachers and high schools’ administration, in order for them to receive quality feedback from their students. Effective management of the learning process requires the introduction to appropriate changes aimed at improving the educational environment; and this can only be done after the results from its evaluation have been analysed. A link between the environment in which students learn, and the quality of their work has been identified and documented (Boyd et al., 2009; Jawaid, 2013). The positive environment gives students self-confidence and it motivates them to achieve better results. The way students perceive their educational environment is highly influenced by the available learning facilities, by their expectations, by their cultural background and upbringing and by their past education (Genn, 2001; Jawaid et al., 2013). This illustrates the importance of students’ opinions on the educational environment.

In this paper, the authors’ collective is presenting a questionnaire, designed and tested by them for the regular evaluation of the educational environment in high schools. The questionnaire was tested on the students of three high schools in Varna: High School of Mathemathics “Doctor Peter Beron”; High School of Commerce “Georgi S. Rakovski”; Fifth Language School “Joan Exarch”.

Materials and methods Questionnaire

Questions1. I am fully aware of the educational aims of the high school curriculum.2. Teachers encourage me to participate in class.3. The learning strategy that I am using is suitable for me.The studysubjects aretoo manyfor meto spendmore timestudying theones thatI like.5. Education is focused on the students’future needs.6. Education is done in a way that increases my competence.7. I rarely feel bored during class.8.The enjoyment from studying for certain subjects is greater than the stress involved.9.Teachers distribute teaching time adequately for covering the learning content.10. Education is too focused on learning facts by heart.11.I don’t think that my current education is preparing me for university.12.I am able to concentrate in class easily.13.Non-traditionaleducationalmethods(role-playing,solvingproblems,discussions,etc.) help me understand the educational content better.14.Aggression is a daily occurrence within this school.15.My problem-solving skills evolved during my education.16.During group problem-solving, answers come up more easily.17. I can discuss my interests with my teacher.18. I am responsible for my education. Teachers are only guiding me.19. Education increases my belief in my knowledge and skills.20.Ineducation,itisimportanttoachieveresults,regardlessofthewaytheyareachieved.21. I would put more eort into a subject which is interesting for me.22.I am able to achieve my personal educational interests during classes.23.The learning load is optimal and equally distributed throughout the week.24.The order of the teaching subjects in a day is not rational and well thought of.25. The school is equipped with opportunities for engaging use of free time.26.Teachers oftengive usgroupprojects,presentations,assignments,whichhelp megetclose to my peers and to take in the learning content more easily27.We are always ready to help peers in need.28.I am satised by my choice of school.29. Teachers treat students with respect.30. There is good communication between parents and students.31. Teachers always come well prepared for class.32.Teachers communicate well with students.33. Teachers use plenty of real life examples during class.34.Most teachers are authoritative.

35.Students provoke annoyance in teachers.36.Teachers’criticising helps us rethink our behaviour.37.Teachers’exammarkingisdoneonafavouritismbasisratherthanstudents’knowledge.38.Teachersoftenconducttheclassesinnon-traditionalforms(game,discussion,debate, press conference).39.I have good friends at school.40.I rarely feel lonely.41.I have the opportunity to establish good interpersonal relationships.42. I do not feel dierent than my peers in a social aspect.43. The environment in class seriously aects my mood.44.The school needs well-equipped classrooms, in order for teaching to run smoothly.45. Group work helps establish friendships.46. We prefer exams to be run as tests.47. I share my problems with my head teacher and I rely on them for advice.48.We wouldliketobeableto suggestadditional topics,accordingtoourown interests.49. If we know how to solve a problem, we share the solution with our peers.50. We discuss between us how to solve problems given by the teacher.

Questionnaire consists of 50 questions, corresponding to the 5-point Likert psychometric scale for measuring social aptitudes. There are: questions related to the educational process (1, 7, 10, 11, 19, 23, 24, 50); questions related to the role of the teacher in the educational process (2, 9, 21, 28, 29, 31, 32); questions related to the relationship between teacher and pupils (14, 16, 17, 30, 33, 34, 35, 37, 38, 45, 47, 48); questions related to the personal attitude of the pupils to the educational process (8, 12, 15, 18, 20, 22, 25, 39, 40, 41, 42, 49); questions related to optimization of the educational process (3, 4, 5, 6, 13, 26, 27, 36, 43, 44, 46). Answers were thus given in points; the highest number of total points corresponding to a maximal positive view of school life.

The possible answers are: I strongly disagree.; I somewhat disagree.; I am not sure.; I somewhat agree.; I strongly agree.

Statistical approach

In this study non-hierarchical clustering of the input data was used. The advantage of this method is that one could preliminary select the number of clusters into which the input data should be classified. Therefore, in order to cluster the 50 questions from the questionnaire 5 clusters were chosen, which corresponds to the number of categories into which the questionnaire could be subdivided from theoretical point of view. For the clustering of the pupils, participating in the study the number of clusters chosen was three since the participants are from grades 9, 10, and 11. It is difficult to expect that the supervised clustering will result in exactly the same preliminary categories but, at least, it give a starting point for proper data interpretation. This type of cluster analysis allows the identification of smaller groups of specific questions (outliers), to which participants in the questionnaire have a specific attitude. All calculations were performed with software package STATISTICA 8.0

The data set consists of 693 objects − schoolboys and girls of three high schools in Varna, grades 9, 10, and 11, characterized by their answers to 50 questions each one ranked by values from 1 to 5 of a questionnaire about quality of learning and relations between schoolchildren and teachers. The male to female ratio of students is approximately

Results and discussion

Non-hierarchical cluster analysis of the 50 questions - assessment of the learning process

After the non-hierachical cluster analysis the questions were grouped into five categories. The questions from the questionnaire are clustered differently for the three different schools (Table 1, Figs. 1 - 3), although in all of them five clusters are formed by non-hierarchical clustering of the variables (questions 1-50).

Table 1. Non-hierachical cluster analysis of the questions

SchoolC1C2C3C4C5Fifth Lan-guage School“Joan Exarch”1, 2, 3, 7, 8,9, 11, 12, 15,17, 19, 22,25, 29,30, 31, 32,33, 34, 365, 6 , 20, 23,35, 37,3816, 18, 21,24, 28, 39,40, 41, 42,43, 4414, 264, 10, 13, 27,45, 46, 47,48, 49, 50High Schoolof Commerce“Georgi S.Rakovski”4, 10, 13, 16,18, 27, 28,40, 42, 44,46, 48, 495, 6, 7, 15,19, 20, 22,23, 25, 33,36, 3726, 381, 2, 3, 8, 9,11, 12, 17,21, 24, 29,30, 31, 32,34, 39, 41,43, 45, 47,5014, 35High SchoolofMathematics5, 7, 14, 24,25, 38, 432, 6, 8, 9, 11,12, 15, 17,19, 22, 29,30, 31, 32,33, 3610, 20, 34,35, 371, 3, 4, 13,16, 18, 21,26, 27, 28,39, 40, 41,42, 44, 45,46, 48, 49,5023, 47
Plot ofMeansforEach ClusterCluster1Cluster2Cluster3Cluster4Cluster520406080100120140160180200Cases-101234567

Figure 1. Plot of means for each cluster (High School of Commerce “Georgi S. Rakovski”)

Attitude towards the questionnaire in different schools

High School of Commerce “Georgi S. Rakovski”, Varna: Four questions indicate a specific attitude – 14, 26, 35 and 38. They are from different categories (questions related to the relationship between teacher and students – 14, 35 and 38 and questions related to optimization of the educational process – 26). It seems that the students are seriously engaged with the problems of aggression at school (14), introduction of common projects (26), teachers are annoyed by the students (35) and introduction of non-traditional lessons (38). All of these questions are characterized by very low scores meaning that the participants do nor accept and approve aggression, feel the lack of common and non-traditional educational instruments and are not teased by their teachers.

Plot ofMeansforEach ClusterCluster 1Cluster 2Cluster 3Cluster 4Cluster 520406080100120140160180200Cases-101234567

Figure 2. Plot of means for each cluster (Fifth Language School “Joan Exarch”)

All other questions are grouped into three other big clusters. Cluster 1 includes dominantly questions related to the optimization of the teaching process and the personal attitude of the students to the educational process (group of educational and personal issues). Cluster 2 is also principally dedicated to the general educational strategy assessment and personal attitude questions (group of educational strategy issues). Cluster 4 is the biggest one and is dominantly linked to all categories of questions (group of general assessment).

As seen in Fig. 1 the participants give lowest marks for questions in clusters 5 and 3 which is already discussed above. For all other clusters the marks are relatively high (between 4 and 5), which is an indication that the students accept the general educational strategy, support the efforts for its optimization and are satisfied with the relationship with the teachers trying to have a personal attitude towards the educational process.

Plot ofMeansforEach ClusterCluster 1Cluster 2Cluster 3Cluster 4Cluster 5265480105130156180204232256Cases-101234567

Figure 3. Plot of means for each cluster (High School of Mathematics)

High School of mathematics, Varna: Cluster 5 contains two outlying object having low marks. It indicates that the pupils from this particular school have specific requirements for some elements of the general educational strategy and the relationship to their teachers. As seen in Fig. 3 the spread between the marks for almost all clusters is quite high. It may mean that the pupil responses to the questions are bidirectional and indicate quite individual opinions on all kind of question categories. That is why the content of each of the four larger clusters (1, 2, 3, 4) is of mixed non-specific character meaning that each clusters consists of questions from all categories. This particular school indicates very versatile individual responses.

Fifth Language School “Joan Exarch”, Varna: For the last school tested one outlying cluster is found (cluster 4), which contains lowest marks for questions 14 and 26 dealing with aggression and introduction of original educational projects. The students deny aggression decisively and suffer the lack of originality in the educational procedures. This situation is well illustrated in Fig. 2 (lowest marks for cluster 4 from all participants. Clusters 1, 2 and 3 (as in the previous case of the mathematical gymnasium) are of complex mixed content comprising questions from all categories. The marks are highest and evenly distributed between 4 and 5. Cluster 5, however, is specific by its relatively low marks and includes dominantly questions from categories related to the pupil personal attitude to education and optimization of the educational process. The pupils are obviously critical to the present state and require improvement.

Non-hierarchical clustering of the students from the dierent schools

The supervised data treatment requires formation of 3 clusters as the preliminary condition was related to the three classes of students participating in the questionnaire (Table 2). It was interesting to find out if the response to the different categories of questions is linked to some extent with the student’s age. Cases numbers 1 - 70 are from 9th grade, 71-140 – 10th grade and 141 – 210 – 11th grade students from the Fifth Language School (Fig. 4) and from the High School of Commerce (Fig. 5). For the School of Mathematics, the respective numbers are 1 – 91, 92 – 182 and 183 – 273.

Plotof MeansforEach ClusterCluster1Cluster2Cluster3Var5Var10Var15Var20Var25Var30Var35Var40Var45Var50Variables0,51,01,52,02,53,03,54,04,55,05,56,0

Figure 4. Fifth Language School “Joan Exarch” (cases)

Plot ofMeansforEach ClusterCluster 1Cluster 2Cluster 3Var5Var10Var15Var20Var25Var30Var35Var40Var45Var50Variables0,51,01,52,02,53,03,54,04,55,05,5

Figure 5. High School of Commerce “Georgi S. Rakovski”

Fifth Language School “Joan Exarch”: The separation with respect to the grouping of the students from the different grades (9, 10, 11) is not very specific. The 9th class students are dominantly in C1, the 10th graders – in C3 and 11th class students – in C2. But the separation with respect to age is not very distinctive or absolute. It might mean that the separation into clusters for this school (based on the questionnaire results) does not depend entirely on age variable.

If one considers the plot of means for each cluster of students, one can conclude that the grouping is due to the various attitudes of the members towards the various questions. Cluster 2 (C2) is characterized by the lowest marks given as response to the questions. Since C2 is dominated by 11 th class pupils, a possible conclusion could be that the elder students are more critical and unsatisfied by the educational process. Surprisingly, highest marks are characteristic for C3 where dominantly 10 th graders are included. The characteristics of C1 are very close to those of C2. Probably, the younger and eldest students are much more critical that those who are in the middle of the period of education in this gymnasium.

High School of Commerce “Georgi S. Rakovski”, Varna: In this school there is even less specificity with respect to age. The pupils are distributed almost evenly in two big and one small cluster, so no specific dominance of age variable th(9,10th,11th grade) could be found.

The discrimination between the three clusters formed for this school is similar to that established for Fifth Language School “Joan Exarch”: for members in cluster 3 the lowest marks are given, for those in cluster 2 – the highest. Cluster 1 takes intermediate position resembling to high extent the average responses of cluster 3. No specific comment for the pupil’s attitude towards the educational process and the relations to teachers in the different age groups could be done.

High School of Mathematics, Varna: In this particular school the separation of the clusters with respect to the student’s age is unsatisfactory. The situation resembles that of High School of Commerce. The difference is that at the High School of mathematics the three clusters are almost equal in size (number of participants from all three categories). The discriminators for the clusters are, again, the average values for the marks to each question from the questionnaire. The averages for the three clusters are quite similar and homogeneous (this is a sign that in this school the attitude towards educational issues is much leveled without age variations): lowest marks for Cluster 1 and highest – for Cluster 3.

Table 2. Non-hierarchical clustering of the students from the different schools

SchoolC1C2C3Fifth LanguageSchool “JoanExarch”9thgrade:1-4,7-11, 13, 15-22, 24-28, 30, 36, 37, 41,42, 45, 51, 53, 56,60-64, 67, 69, 7010thgrade:81,95,123,125,132,134, 13811thgrade:145-147, 155, 156, 162,164, 168, 171, 173,174, 185, 190, 193,186, 198, 2009thgrade:6, 23, 35, 38,40, 44, 48, 52, 55, 59,72, 74,10thgrade:75, 76,78, 82,84, 88,96, 98, 103, 109, 111,114, 117, 120, 121,122,126,128,130,131133, 135, 136, 140-144,11thgrade:148-154,157,159-161, 63, 167,169, 170, 172, 175-183,187, 192, 195, 2019thgrade:6, 12, 14,29, 31-34, 39, 43, 46,47, 49, 50, 54, 57, 58,65, 66, 6810thgrade:71, 73,77, 79, 80, 83, 85-87,89-94, 97, 99-102,104, 105, 107,108, 110, 112, 113,115, 116, 118,119,124,125,129,137,139,11thgrade:158, 65,166, 184, 186, 188,189, 191, 194, 197,199, 202-210
High Schoolof Commerce“Georgi S. Rak-ovski”9thgrade:2, 3, 7-9,11, 13, 18, 22, 27,37, 38, 42, 51, 56,58, 60, 64, 6510thgrade:72,74-76, 78, 84, 96,103, 106, 109, 111,117, 120-122, 124,125, 127, 130-134,136-138, 14011thgrade:142-147, 155, 156, 171,178, 179, 181-183,185, 187, 190, 192,195,196,198,2019thgrade:1, 4, 5, 10, 12,14-17, 20, 21, 24-26, 28-34, 36, 39, 41,43, 45-47, 49, 50, 53, 54,57, 61-63, 66-71,10thgrade:73, 77, 79,80, 83, 85-95, 97, 99-102,104, 105, 107, 108, 110,112, 113, 115, 116, 118,119, 123, 129, 13911thgrade:158, 162,165, 166, 175, 184, 186,188, 189, 191,193, 194, 197, 199, 200202-2109thgrade:6, 23, 35,40, 44, 48, 52, 55, 5910thgrade:81, 82,98, 114, 126, 128, 13511thgrade:141, 148-154, 157, 159-161,163, 164, 167-170,171, 173, 175-177,180High SchoolofMathematics9thgrade:4, 21, 28,34, 35, 38, 46, 48,50, 52, 54, 56, 57,60,67,76-78, 83,85, 88, 9010thgrade:101-103, 105, 109, 116,120, 130, 137, 140,142, 148, 154-156,160, 166, 168, 171-173, 176, 178, 17911thgrade:181,182, 186, 188, 199,201, 202, 212, 215,231, 239, 243, 248,250, 261, 2639thgrade:6, 7, 9, 13, 18-20, 25, 26, 29, 31, 32, 41,44, 61, 69, 70, 73, 74, 75,79-82, 84, 87, 89, 8110thgrade:94, 95, 106,107, 110, 112, 113, 122,124, 126, 128, 131, 132,138, 139, 143-145, 151-153, 161-165, 170, 177,18011thgrade:184, 185,187, 189, 190, 194-198,200, 203, 204, 210, 211,213, 216, 218, 220-223,225-227, 230, 232-235,240-142, 244, 247,251,252, 254,256- 260, 262,265, 267, 269, 2739thgrade:1, 3, 5, 8,9-12, 14-17, 22-24,27, 30, 33, 36, 37, 39,40, 42, 43, 45, 47, 49,51, 53, 55, 58, 59,62, 64-66, 68, 71, 72,86, 9110thgrade:92, 93,96-100, 104, 108, 111,114, 115, 117--119,121, 123, 125, 127,129, 133-136, 141,146, 147, 149, 150,157-159, 167-169,174, 17511thgrade:183,191-193, 205-209, 214,217, 219, 224, 228,229, 236, 237, 238,245, 246, 249, 253,255, 264, 266, 268,270-272

Conclusion

In general, the students from both Fifth Language School “Joan Exarch” and High School of Commerce “Georgi S. Rakovski” react with higher differentiability to the questionnaire and it makes it possible to analyze better different groups of attitude towards the educational issues. On contrary, the students from the High School of Mathematics reveal a strictly individual attitude towards the different categories of questions and it does not allow strict grouping of both questions and students.

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2022 година
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METEOROLOGICAL DETERMINANTS OF COVID-19 DISEASE: A LITERATURE REVIEW

Z. Mateeva, E. Batchvarova, Z. Spasova, I. Ivanov, B. Kazakov, S. Matev, A. Simidchiev, A. Kitev

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MATHEMATICAL MODELLING OF THE TRANSMISSION MECHANISM OF PLAMODIUM FALCIPARUM

Onitilo S. A, Usman M. A., Daniel D. O. Odetunde O. S., Ogunwobi Z. O., Hammed F. A., Olubanwo O. O., Ajani A. S., Sanusi A. S., Haruna A. H.

ПОСТАНОВКА ЗА ИЗМЕРВАНЕ СКОРОСТТА НА ЗВУКА ВЪВ ВЪЗДУХ

Станислав Сланев, Хафизе Шабан, Шебнем Шабан, Анета Маринова

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MAGNETIC PROPERTIES

Sofija Blagojević, Lana Vujanović, Andreana Kovačević Ćurić

„TAP, TAP WATER“ QUANTUM TUNNELING DEMONSTRATION

Katarina Borković, Andreana Kovačević Ćurić

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КОМЕТИТЕ – I ЧАСТ

Пенчо Маркишки

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DISTANCE LEARNING: HOMEMADE COLLOIDAL SILVER

Ana Sofía Covarrubias-Montero, Jorge G. Ibanez

2021 година
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STUDY OF COMPOSITIONS FOR SELECTIVE WATER ISOLATION IN GAS WELLS

Al-Obaidi S.H., Hofmann M., Smirnov V.I., Khalaf F.H., Alwan H.H.

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POTENTIAL APPLICATIONS OF ANTIBACTERIAL COMPOUNDS IN EDIBLE COATING AS FISH PRESERVATIVE

Maulidan Firdaus, Desy Nila Rahmana, Diah Fitri Carolina, Nisrina Rahma Firdausi, Zulfaa Afiifah, Berlian Ayu Rismawati Sugiarto

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INVESTIGATION OF 238U, 234U AND 210PO CONTENT IN SELECTED BULGARIAN DRINKING WATER

Bozhidar Slavchev, Elena Geleva, Blagorodka Veleva, Hristo Protohristov, Lyuben Dobrev, Desislava Dimitrova, Vladimir Bashev, Dimitar Tonev

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DEMONSTRATION OF DAMPED ELECTRICAL OSCILLATIONS

Elena Grebenakova, Stojan Manolev

2020 година
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ДОЦ. Д-Р МАРЧЕЛ КОСТОВ КОСТОВ ЖИВОТ И ТВОРЧЕСТВО

Здравка Костова, Елена Георгиева

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JACOB’S LADDER FOR THE PHYSICS CLASSROOM

Kristijan Shishkoski, Vera Zoroska

КАЛЦИЙ, ФОСФОР И ДРУГИ ФАКТОРИ ЗА КОСТНО ЗДРАВЕ

Радка Томова, Светла Асенова, Павлина Косева

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MATHEMATICAL MODELING OF 2019 NOVEL CORONAVIRUS (2019 – NCOV) PANDEMIC IN NIGERIA

Sefiu A. Onitilo, Mustapha A. Usman, Olutunde S. Odetunde, Fatai A. Hammed, Zacheous O. Ogunwobi, Hammed A. Haruna, Deborah O. Daniel

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WATER PURIFICATION WITH LASER RADIATION

Lyubomir Lazov, Hristina Deneva, Galina Gencheva

2019 година
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LASER MICRO-PERFORATION AND FIELDS OF APPLICATION

Hristina Deneva, Lyubomir Lazov, Edmunds Teirumnieks

ПРОЦЕСЪТ ДИФУЗИЯ – ОСНОВА НА ДИАЛИЗАТА

Берна Сабит, Джемиле Дервиш, Мая Никова, Йорданка Енева

IN VITRO EVALUATION OF THE ANTIOXIDANT PROPERTIES OF OLIVE LEAF EXTRACTS – CAPSULES VERSUS POWDER

Hugo Saint-James, Gergana Bekova, Zhanina Guberkova, Nadya Hristova-Avakumova, Liliya Atanasova, Svobodan Alexandrov, Trayko Traykov, Vera Hadjimitova

Бележки върху нормативното осигуряване на оценяването в процеса

БЕЛЕЖКИ ВЪРХУ НОРМАТИВНОТО ОСИГУРЯВАНЕ, НА ОЦЕНЯВАНЕТО В ПРОЦЕСА НА ОБУЧЕНИЕТО

ТЕХНОЛОГИЯ

Б. В. Тошев

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ON THE GENETIC TIES BETWEEN EUROPEAN NATIONS

Jordan Tabov, Nevena Sabeva-Koleva, Georgi Gachev

Иван Странски – майсторът на кристалния растеж [Ivan Stranski

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CHEMOMETRIC ANALYSIS OF SCHOOL LIFE IN VARNA

Radka Tomova, Petinka Galcheva, Ivajlo Trajkov, Antoaneta Hineva, Stela Grigorova, Rumyana Slavova, Miglena Slavova

ЦИКЛИТЕ НА КРЕБС

Ивелин Кулев

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ПРИНЦИПИТЕ НА КАРИЕРНОТО РАЗВИТИЕ НА МЛАДИЯ УЧЕН

И. Панчева, М. Недялкова, С. Кирилова, П. Петков, В. Симеонов

UTILISATION OF THE STATIC EVANS METHOD TO MEASURE MAGNETIC SUSCEPTIBILITIES OF TRANSITION METAL ACETYLACETONATE COMPLEXES AS PART OF AN UNDERGRADUATE INORGANIC LABORATORY CLASS

Anton Dobzhenetskiy, Callum A. Gater, Alexander T. M. Wilcock, Stuart K. Langley, Rachel M. Brignall, David C. Williamson, Ryan E. Mewis

THE 100

Maria Atanassova, Radoslav Angelov

A TALE OF SEVEN SCIENTISTS

Scerri, E.R. (2016). A Tale of Seven Scientists and a New Philosophy of Science.

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DEVELOPMENT OF A LESSON PLAN ON THE TEACHING OF MODULE “WATER CONDUCTIVITY”

A. Thysiadou, S. Christoforidis, P. Giannakoudakis

AMPEROMETRIC NITRIC OXIDE SENSOR BASED ON MWCNT CHROMIUM(III) OXIDE NANOCOMPOSITE

Arsim Maloku, Epir Qeriqi, Liridon S. Berisha, Ilir Mazreku, Tahir Arbneshi, Kurt Kalcher

THE EFFECT OF AGING TIME ON Mg/Al HYDROTALCITES STRUCTURES

Eddy Heraldy, Triyono, Sri Juari Santosa, Karna Wijaya, Shogo Shimazu

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A CONTENT ANALYSIS OF THE RESULTS FROM THE STATE MATRICULATION EXAMINATION IN MATHEMATICS

Elena Karashtranova, Nikolay Karashtranov, Vladimir Vladimirov

SOME CONCEPTS FROM PROBABILITY AND STATISTICS AND OPPORTUNITIES TO INTEGRATE THEM IN TEACHING NATURAL SCIENCES

Elena Karashtranova, Nikolay Karashtranov, Nadezhda Borisova, Dafina Kostadinova

45. МЕЖДУНАРОДНА ОЛИМПИАДА ПО ХИМИЯ

Донка Ташева, Пенка Василева

2018 година
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ЗДРАВЕ И ОКОЛНА СРЕДА

Кадрие Шукри, Светлана Великова, Едис Мехмед

РОБОТИКА ЗА НАЧИНАЕЩИ ЕНТУСИАСТИ

Даниела Узунова, Борис Велковски, Илко Симеонов, Владислав Шабански, Димитър Колев

DESIGN AND DOCKING STUDIES OF HIS-LEU ANALOGUES AS POTENTIOAL ACE INHIBITORS

Rumen Georgiev, , Tatyana Dzimbova, Atanas Chapkanov

X-RAY DIFFRACTION STUDY OF M 2 Zn(TeО3)2 (M - Na, K) ТELLURIDE

Kenzhebek T. Rustembekov, Mitko Stoev, Aitolkyn A. Toibek

CALIBRATION OF GC/MS METHOD FOR DETERMINATION OF PHTHALATES

N. Dineva, I. Givechev, D. Tanev, D. Danalev

ELECTROSYNTHESIS OF CADMIUM SELENIDE NANOPARTICLES WITH SIMULTANEOUS EXTRACTION INTO P-XYLENE

S. S. Fomanyuk, V. O. Smilyk, G. Y. Kolbasov, I. A. Rusetskyi, T. A. Mirnaya

БИОЛОГИЧЕН АСПЕКТ НА РЕКАНАЛИЗАЦИЯ С ВЕНОЗНА ТРОМБОЛИЗА

Мариела Филипова, Даниела Попова, Стоян Везенков

CHEMISTRY: BULGARIAN JOURNAL OF SCIENCE EDUCATION ПРИРОДНИТЕ НАУКИ В ОБРАЗОВАНИЕТО VOLUME 27 / ГОДИНА XXVII, 2018 ГОДИШНО СЪДЪРЖАНИЕ СТРАНИЦИ / PAGES КНИЖКА 1 / NUMBER 1: 1 – 152 КНИЖКА 2 / NUMBER 2: 153 – 312 КНИЖКА 3 / NUMBER 3: 313 – 472 КНИЖКА 4 / NUMBER 4: 473 – 632 КНИЖКА 5 / NUMBER 5: 633 – 792 КНИЖКА 6 / NUMBER 6: 793 – 952 КНИЖКА 1 / NUMBER 1: 1 – 152 КНИЖКА 2 / NUMBER 2: 153 – 312 КНИЖКА

(South Africa), A. Ali, M. Bashir (Pakistan) 266 – 278: j-j Coupled Atomic Terms for Nonequivalent Electrons of (n-1)fx and nd1 Configurations and Correlation with L-S Terms / P. L. Meena (India) 760 – 770: Methyl, тhe Smallest Alkyl Group with Stunning Effects / S. Moulay 771 – 776: The Fourth State of Matter / R. Tsekov

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ИМОБИЛИЗИРАНЕНАФРУКТОЗИЛТРАНСФЕРАЗА ВЪРХУКОМПОЗИТНИФИЛМИОТПОЛИМЛЕЧНА КИСЕЛИНА, КСАНТАН И ХИТОЗАН

Илия Илиев, Тонка Василева, Веселин Биволарски, Ася Виранева, Иван Бодуров, Мария Марудова, Теменужка Йовчева

ELECTRICAL IMPEDANCE SPECTROSCOPY OF GRAPHENE-E7 LIQUID-CRYSTAL NANOCOMPOSITE

Todor Vlakhov, Yordan Marinov, Georgi. Hadjichristov, Alexander Petrov

ON THE POSSIBILITY TO ANALYZE AMBIENT NOISERECORDED BYAMOBILEDEVICETHROUGH THE H/V SPECTRAL RATIO TECHNIQUE

Dragomir Gospodinov, Delko Zlatanski, Boyko Ranguelov, Alexander Kandilarov

RHEOLOGICAL PROPERTIES OF BATTER FOR GLUTEN FREE BREAD

G. Zsivanovits, D. Iserliyska, M. Momchilova, M. Marudova

ПОЛУЧАВАНЕ НА ПОЛИЕЛЕКТРОЛИТНИ КОМПЛЕКСИ ОТ ХИТОЗАН И КАЗЕИН

Антоанета Маринова, Теменужка Йовчева, Ася Виранева, Иван Бодуров, Мария Марудова

CHEMILUMINESCENT AND PHOTOMETRIC DETERMINATION OF THE ANTIOXIDANT ACTIVITY OF COCOON EXTRACTS

Y. Evtimova, V. Mihailova, L. A. Atanasova, N. G. Hristova-Avakumova, M. V. Panayotov, V. A. Hadjimitova

ИЗСЛЕДОВАТЕЛСКИ ПРАКТИКУМ

Ивелина Димитрова, Гошо Гоев, Савина Георгиева, Цвета Цанова, Любомира Иванова, Борислав Георгиев

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PARAMETRIC INTERACTION OF OPTICAL PULSES IN NONLINEAR ISOTROPIC MEDIUM

A. Dakova, V. Slavchev, D. Dakova, L. Kovachev

ДЕЙСТВИЕ НА ГАМА-ЛЪЧИТЕ ВЪРХУ ДЕЗОКСИРИБОНУКЛЕИНОВАТА КИСЕЛИНА

Мирела Вачева, Хари Стефанов, Йоана Гвоздейкова, Йорданка Енева

RADIATION PROTECTION

Natasha Ivanova, Bistra Manusheva

СТАБИЛНОСТ НА ЕМУЛСИИ ОТ ТИПА МАСЛО/ ВОДА С КОНЮГИРАНА ЛИНОЛОВА КИСЕЛИНА

И. Милкова-Томова, Д. Бухалова, К. Николова, Й. Алексиева, И. Минчев, Г. Рунтолев

THE EFFECT OF EXTRA VIRGIN OLIVE OIL ON THE HUMAN BODY AND QUALITY CONTROL BY USING OPTICAL METHODS

Carsten Tottmann, Valentin Hedderich, Poli Radusheva, Krastena Nikolova

ИНФРАЧЕРВЕНА ТЕРМОГРАФИЯ ЗА ДИАГНОСТИКА НА ФОКАЛНА ИНФЕКЦИЯ

Рая Грозданова-Узунова, Тодор Узунов, Пепа Узунова

ЕЛЕКТРИЧНИ СВОЙСТВА НА КОМПОЗИТНИ ФИЛМИ ОТ ПОЛИМЛЕЧНА КИСЕЛИНА

Ася Виранева, Иван Бодуров, Теменужка Йовчева

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ТРИ ИДЕИ ЗА ЕФЕКТИВНО ОБУЧЕНИЕ

Гергана Карафезиева

МАГИЯТА НА ТВОРЧЕСТВОТО КАТО ПЪТ НА ЕСТЕСТВЕНО УЧЕНЕ В УЧЕБНИЯ ПРОЦЕС

Гергана Добрева, Жаклин Жекова, Михаела Чонос

ОБУЧЕНИЕ ПО ПРИРОДНИ НАУКИ ЧРЕЗ МИСЛОВНИ КАРТИ

Виолета Стоянова, Павлина Георгиева

ИГРА НА ДОМИНО В ЧАС ПО ФИЗИКА

Росица Кичукова, Ценка Маринова

ПРОБЛЕМИ ПРИ ОБУЧЕНИЕТО ПО ФИЗИКА ВЪВ ВВМУ „Н. Й. ВАПЦАРОВ“

А. Христова, Г. Вангелов, И. Ташев, М. Димидов

ИЗГРАЖДАНЕ НА СИСТЕМА ОТ УЧЕБНИ ИНТЕРНЕТ РЕСУРСИ ПО ФИЗИКА И ОЦЕНКА НА ДИДАКТИЧЕСКАТА ИМ СТОЙНОСТ

Желязка Райкова, Георги Вулджев, Наталия Монева, Нели Комсалова, Айше Наби

ИНОВАЦИИ В БОРБАТА С ТУМОРНИ ОБРАЗУВАНИЯ – ЛЕЧЕНИЕ ЧРЕЗ БРАХИТЕРАПИЯ

Георги Върбанов, Радостин Михайлов, Деница Симеонова, Йорданка Енева

NATURAL RADIONUCLIDES IN DRINKING WATER

Natasha Ivanova, Bistra Manusheva

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АДАПТИРАНЕ НА ОБРАЗОВАНИЕТО ДНЕС ЗА УТРЕШНИЯ ДЕН

И. Панчева, М. Недялкова, П. Петков, Х. Александров, В. Симеонов

STRUCTURAL ELUCIDATION OF UNKNOWNS: A SPECTROSCOPIC INVESTIGATION WITH AN EMPHASIS ON 1D AND 2D 1H NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY

Vittorio Caprio, Andrew S. McLachlan, Oliver B. Sutcliffe, David C. Williamson, Ryan E. Mewis

j-j Coupled Atomic Terms for Nonequivalent Electrons of (n-1)f

j-jCOUPLEDATOMICTERMSFORNONEQUIVALENT, ELECTRONS OF (n-f X nd CONFIGURATIONS AND, CORRELATION WITH L-S TERMS

INTEGRATED ENGINEERING EDUCATION: THE ROLE OF ANALYSIS OF STUDENTS’ NEEDS

Veselina Kolarski, Dancho Danalev, Senia Terzieva

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ZAGREB CONNECTION INDICES OF TiO2 NANOTUBES

Sohaib Khalid, Johan Kok, Akbar Ali, Mohsin Bashir

SYNTHESIS OF NEW 3-[(CHROMEN-3-YL)ETHYLIDENEAMINO]-PHENYL]-THIAZOLIDIN-4ONES AND THEIR ANTIBACTERIAL ACTIVITY

Ramiz Hoti, Naser Troni, Hamit Ismaili, Malesore Pllana, Musaj Pacarizi, Veprim Thaçi, Gjyle Mulliqi-Osmani

2017 година
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GEOECOLOGICAL ANALYSIS OF INDUSTRIAL CITIES: ON THE EXAMPLE OF AKTOBE AGGLOMERATION

Zharas Berdenov, Erbolat Mendibaev, Talgat Salihov, Kazhmurat Akhmedenov, Gulshat Ataeva

TECHNOGENESIS OF GEOECOLOGICAL SYSTEMS OF NORTHEN KAZAKHSTAN: PROGRESS, DEVELOPMENT AND EVOLUTION

Kulchichan Dzhanaleyeva, Gulnur Mazhitova, Altyn Zhanguzhina, Zharas Berdenov, Tursynkul Bazarbayeva, Emin Atasoy

СПИСАНИЕ ПРОСВѢТА

Списание „Просвета“ е орган на Просветния съюз в България. Списанието е излизало всеки месец без юли и август. Годишният том съдържа 1280 стра- ници. Списанието се издава от комитет, а главен редактор от 1935 до 1943 г. е проф. Петър Мутафчиев, историк византолог и специалист по средновеков-

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47-А НАЦИОНАЛНА КОНФЕРЕНЦИЯ НА УЧИТЕЛИТЕ ПО ХИМИЯ

В последните години тези традиционни за българското учителство конфе- ренции се организират от Българското дружество по химическо образование и история и философия на химията. То е асоцииран член на Съюза на химици- те в България, който пък е член на Европейската асоциация на химическите и

JOURNALS OF INTEREST: A REVIEW (2016)

BULGARIAN JOURNAL OF SCIENCE AND EDUCATION POLICY ISSN 1313-1958 (print) ISSN 1313-9118 (online) http://bjsep.org

INVESTIGATING THE ABILITY OF 8

Marina Stojanovska, Vladimir M. Petruševski

SYNTHESIS OF TiO -M (Cd, Co, Mn)

Candra Purnawan, Sayekti Wahyuningsih, Dwita Nur Aisyah

EFFECT OF DIFFERENT CADMIUM CONCENTRATION ON SOME BIOCHEMICAL PARAMETERS IN ‘ISA BROWN’ HYBRID CHICKEN

Imer Haziri, Adem Rama, Fatgzim Latifi, Dorjana Beqiraj-Kalamishi, Ibrahim Mehmeti, Arben Haziri

PHYTOCHEMICAL AND IN VITRO ANTIOXIDANT STUDIES OF PRIMULA VERIS (L.) GROWING WILD IN KOSOVO

Ibrahim Rudhani, Florentina Raci, Hamide Ibrahimi, Arben Mehmeti, Ariana Kameri, Fatmir Faiku, Majlinda Daci, Sevdije Govori, Arben Haziri

ПЕДАГОГИЧЕСКА ПОЕМА

Преди година-две заедно с директора на Националното издателство „Аз- буки“ д-р Надя Кантарева-Барух посетихме няколко училища в Родопите. В едно от тях ни посрещнаха в голямата учителска стая. По стените ѝ имаше големи портрети на видни педагози, а под тях – художествено написани умни мисли, които те по някакъв повод са казали. На централно място бе портретът на Антон Семьонович Макаренко (1888 – 1939). Попитах учителките кой е Макаренко – те посрещнаха въпроса ми с мълчание. А някога, в г

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„СИМВОЛНИЯТ КАПИТАЛ“ НА БЪЛГАРСКОТО УЧИЛИЩЕ

Николай Цанков, Веска Гювийска

KINETICS OF PHOTO-ELECTRO-ASSISTED DEGRADATION OF REMAZOL RED 5B

Fitria Rahmawati, Tri Martini, Nina Iswati

ALLELOPATHIC AND IN VITRO ANTICANCER ACTIVITY OF STEVIA AND CHIA

Asya Dragoeva, Vanya Koleva, Zheni Stoyanova, Eli Zayova, Selime Ali

NOVEL HETEROARYLAMINO-CHROMEN-2-ONES AND THEIR ANTIBACTERIAL ACTIVITY

Ramiz Hoti, Naser Troni, Hamit Ismaili, Gjyle Mulliqi-Osmani, Veprim Thaçi

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Quantum Connement of Mobile Na+ Ions in Sodium Silicate Glassy

QUANTUM CONFINEMENT OF MOBILE Na + IONS, IN SODIUM SILICATE GLASSY NANOPARTICLES

OPTIMIZATION OF ENGINE OIL FORMULATION USING RESPONSE SURFACE METHODOLOGY AND GENETIC ALGORITHM: A COMPARATIVE STUDY

Behnaz Azmoon, Abolfazl Semnani, Ramin Jaberzadeh Ansari, Hamid Shakoori Langeroodi, Mahboube Shirani, Shima Ghanavati Nasab

EVALUATION OF ANTIBACTERIAL ACTIVITY OF DIFFERENT SOLVENT EXTRACTS OF TEUCRIUM CHAMAEDRYS (L.) GROWING WILD IN KOSOVO

Arben Haziri, Fatmir Faiku, Roze Berisha, Ibrahim Mehmeti, Sevdije Govori, Imer Haziri

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COMPUTER SIMULATORS: APPLICATION FOR GRADUATES’ADAPTATION AT OIL AND GAS REFINERIES

Irena O. Dolganova, Igor M. Dolganov, Kseniya A. Vasyuchka

SYNTHESIS OF NEW [(3-NITRO-2-OXO-2H-CHROMEN4-YLAMINO)-PHENYL]-PHENYL-TRIAZOLIDIN-4-ONES AND THEIR ANTIBACTERIAL ACTIVITY

Ramiz Hoti, Hamit Ismaili, Idriz Vehapi, Naser Troni, Gjyle Mulliqi-Osmani, Veprim Thaçi

STABILITY OF RJ-5 FUEL

Lemi Türker, Serhat Variş

A STUDY OF BEGLIKTASH MEGALITHIC COMPLEX

Diana Kjurkchieva, Evgeni Stoykov, Sabin Ivanov, Borislav Borisov, Hristo Hristov, Pencho Kyurkchiev, Dimitar Vladev, Irina Ivanova

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2016 година
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THE EFFECT OF KOH AND KCL ADDITION TO THE DESTILATION OF ETHANOL-WATER MIXTURE

Khoirina Dwi Nugrahaningtyas, Fitria Rahmawati, Avrina Kumalasari

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ОЦЕНЯВАНЕ ЛИЧНОСТТА НА УЧЕНИКА

Министерството на народното просвещение е направило допълне- ния към Правилника за гимназиите (ДВ, бр. 242 от 30 октомври 1941 г.), според които в бъдеще ще се оценяват следните прояви на учениците: (1) трудолюбие; (2) ред, точност и изпълнителност; (3) благовъзпитаност; (4) народностни прояви. Трудолюбието ще се оценява с бележките „образцово“, „добро“, „незадо- волително“. С „образцово“ ще се оценяват учениците, които с любов и по- стоянство извършват всяка възложена им ил

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VOLTAMMERIC SENSOR FOR NITROPHENOLS BASED ON SCREEN-PRINTED ELECTRODE MODIFIED WITH REDUCED GRAPHENE OXIDE

Arsim Maloku, Liridon S. Berisha, Granit Jashari, Eduard Andoni, Tahir Arbneshi

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ИЗСЛЕДВАНЕ НА ПРОФЕСИОНАЛНО-ПЕДАГОГИЧЕСКАТА РЕФЛЕКСИЯ НА УЧИТЕЛЯ ПО БИОЛОГИЯ (ЧАСТ ВТОРА)

Надежда Райчева, Иса Хаджиали, Наташа Цанова, Виктория Нечева

EXISTING NATURE OF SCIENCE TEACHING OF A THAI IN-SERVICE BIOLOGY TEACHER

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На 8 март 2016 г. в голямата зала на Националния политехнически музей в София фондация „Вигория“ връчи годишните си награди – почетен плакет „Златна детелина“. Тази награда се дава за цялостна професионална и творче- ска изява на личности с особени заслуги към обществото в трите направления на фондация „Вигория“ – образование, екология, култура. Наградата цели да се даде израз на признателност за високи постижения на личности, които на професионално равнище и на доброволни начала са рабо

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СТО ГОДИНИ ОТ РОЖДЕНИЕТО НА ПРОФЕСОР ХРИСТО ИВАНОВ (1916 – 2004)

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COMPLEX SYSTEMS FOR DRUG TRANSPORT ACROSS CELL MEMBRANES

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Nina Danchova , Gulay Ahmed , Michael Bredol , Stoyan Gutzov

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I. Panaiotov, Tz. Ivanova, K. Balashev, N. Grozev, I. Minkov, K. Mircheva

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TEACHER’S ACCEPTANCE OF STUDENTS WITH DISABILITY

Daniela Dimitrova-Radojchikj, Natasha Chichevska-Jovanova

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Zahra Eskandari, Nabi.A Ebrahimi Young Researchers & Elite Club, Arsanjan Branch,

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БЛАГОДАРЯ ВИ!

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SYNTHESIS OF FLUORINATED HYDROXYCINNAMOYL DERIVATIVES OF ANTI-INFLUENZA DRUGS AND THEIR BIOLOGICAL ACTIVITY

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TEACHING CHEMISTRY AT TECHNICAL UNIVERSITY

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РУМЕН ЛЮБОМИРОВ ДОЙЧЕВ (1938 – 1999)

Огнян Димитров, Здравка Костова

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Maria Atanassova

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145 ГОДИНИ БЪЛГАРСКА АКАДЕМИЯ НА НАУКИТЕ

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ПАРНО НАЛЯГАНЕ НА РАЗТВОРИ

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V. Romanenko, G. Nikitina Academy of Information Technologies in Education, Russia

ALLELOPATHIC AND CYTOTOXIC ACTIVITY OF ORIGANUM VULGARE SSP. VULGARE GROWING WILD IN BULGARIA

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GENDER ISSUES OF UKRAINIAN HIGHER EDUCATION

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Saâd Moulay Université Saâd Dahlab de Blida, Algeria

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44

Донка Ташева, Пенка Василева

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Maria Atanassova, Radoslav Angelov

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DIFFERENTIAL TEACHING IN SCHOOL SCIENCE EDUCATION: CONCEPTUAL PRINCIPLES

G. Yuzbasheva Kherson Academy of Continuing Education, Ukraine

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Srihari Murthy Meenakshi Sundararajan Engineering College, India

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COLORFUL EXPERIMENTS FOR STUDENTS: SYNTHESIS OF INDIGO AND DERIVATIVES

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ADDRESING STUDENTS’ MISCONCEPTIONS CONCERNING CHEMICAL REACTIONS AND SYMBOLIC REPRESENTATIONS

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КОНЦЕПТУАЛНА СХЕМА НА УЧИЛИЩНИЯ КУРС П О ХИМИЯ – МАКР О СКОПСКИ ПОДХОД

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1. Биология Студентите от специалност Биология придобиват знания и практически умения в областта на биологическите науки, като акцентът е поставен на организмово равнище. Те се подготвят да изследват биологията на организмите на клетъчно- организмово, популационно и екосистемно ниво в научно-функционален и прило- жен аспект, с оглед на провеждане на научно-изследователска, научно-приложна, производствена и педагогическа дейност. Чрез широк набор избираеми и факул- тативни курсове студентите

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УЧИТЕЛИТЕ ПО ПРИРОДНИ НАУКИ – ЗА КОНСТРУКТИВИСТКАТА УЧЕБНА СРЕДА В БЪЛГАРСКОТО УЧИЛИЩЕ

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