Learning analytics can be used to measure the level of student participation in online learning. This study is the best practice in conducting student learning assistance services through online learning, and aims to analyze student involvement during the learning process. The study was conducted on subjects offered by the Open University Chemistry Education course. The data were obtained based on the activity of online learning for one semester conducted by tutors and each tutor holding 1 class. The results obtained show that through learning analytic many items that can be assessed by the tutor on student activities during the online learning take place, among which are: 1) the number of overview accesses by the students on each topic or the reading of the tutorial material 2) the number of access made by each student on tutorial material 3) number of student access in reading each discussion material in discussion forum and, 4) number of response given/uploaded by every student in discussion forum. Other information that can be gained through the use of learning analytics is the interaction of learning that occurs between students with students and students with tutors. Interaction patterns are illustrated through graphs and responses among students.

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Chemical Education Study program S1 at Universitas Terbuka (UT) opened since 1986, provides laboratory works to ensure practical competencies of students with degree in chemical education. Accordingly, guidance is developed to manage the lab works which focus on step, materials, and support required for the lab works. While the guidance is developed in UT's main office, the lab works are conducted in (all 38) UT Regional Centre's. The UT Regional Centers have responsibility to provide lab schedule for all students registered in courses with lab work via all communication media, namely SMS, email and phone. Before starting the lab works. UT Regional Centers have to explain requirements and procedures of the lab works to the students. UT Regional Centers have also been responsible to recruit and employ qualified instructors based on requirement written in the guidance. After years of implementation, it is necessary to evaluate the effectiveness of the lab works. The study that reported here is aimed at analyzing student's perceptions of lab works' quality and constraints. The study was conducted and involved 24 persons from UT Regional Centers, student registered in the first and second semester of 2014 academic year, 8 of 38 UT Regional Centers (because students registered in courses only half of the total Regional Centers). Data were gathered through questioners. Analyzed using mix method qualitative. Qualitative with video conference. Results shows that students had positive perception toward lab work implementation. However, there was a tendency of students to work in groups, not individually as required, due to limited circumstantial situation. In some UT Regional Centers, lab work could only be conducted in place far away from the office that cause difficulty for students to attend. In term of the guidance, students perceived lab works to be good although not entirely helpful.

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Aerobiology is a multidisciplinary science dealing with biological particles in the atmosphere generated by natural activities during flowering season. Airborne pollen is now the main studied biological structure which is used as a reliable tool to study plant phenology, plant distribution changes and prediction of crop production. The main aims of this work is to determine the distribution of the different spring flowering species from the North to the South of Tunisia and to establish the pollen spectrum of three regions Mornag (North), Menzel M’hiri (Centre) and Chaal (South) in 2017. Airborne pollen data were collected using three volumetric Hirst-type spore traps placed in Mornag (36°39N; 10°16E), Menzel M’hiri (35°38N; 10°41E) and Chaal (34°34N; 10°19E) during olive flowering season. The highest pollen index was recorded in the north (Mornag, 6487.1) corresponding mainly to 18 different pollen types emitted by anemophilous species with an important presence of Cupressus pollen type having the highest contribution. Lower pollen amounts were recorded in Menzel M’hiri (5983.8) and Chaal (925.3). Olea eurpoeae was the most presented pollen type in these regions. However comparing the different study sites we can note a large distribution of some taxa from north to the south. The main common taxa were Olea europaea, Cupressaceae, Poaceae and Amaranhaceae. Their atmospheric concentrations varied also between the regions. Individual pollen index showed a sharp heterogeneity between the taxa in the same region in one hand and between the study sites in the other hand, thus a statistical analysis was performed to define the main group of taxa according to their individual pollen index. Flowering phenology of the main common taxa was also established.