Oblique impact of ice hockey and plastic pucks with a rigid surface

The collision of a disk with a rigid surface is analysed in this paper assuming that the disk slides throughout the collision at glancing angles or grips the surface at other angles of incidence. Experimental results are presented for an ice hockey puck and a plastic disk, showing that there is no rolling involved, as assumed in previous studies. Measurements are presented of the outgoing speed, angle and spin as a function of the angle of incidence, and the results are described in terms of the normal and tangential coefficients of restitution plus the coefficient of sliding friction. The experiment would be suitable for use in a student laboratory.

A build-at-home student laboratory experiment in mechanical vibrations

The Covid-19 pandemic has caused many university educators to redesign their teaching to online delivery. This can be an effective approach for theoretical and conceptual teaching, but it is challenging to provide practical laboratory experiences. The objective here is to design a hands-on laboratory experience that can safely be undertaken by students remotely and that has substantial educational content. A new experiment was designed featuring a bifilar pendulum that students build themselves from readily available low-cost materials. This simple vibrating system has a surprisingly rich set of interesting physical characteristics that provide several important learning points. Initial trials indicate good student experience with the new experiment, notably an appreciation for the “do-it-yourself” aspect of the apparatus construction. The self-directed features and multiple learning features of the new student experiment make it attractive for use during Covid-19 times and beyond.

Implementation of Asynchronous Educational Modules to Improve Student Understanding of Statistical Analysis in STEM Undergraduate Courses

Due to the COVID-19 pandemic, many undergraduate students have been given no other option but to take their classes remotely. This has provided many challenges for both students and instructors, especially in the STEM field due to the required laboratory coursework. For this reason, alternative methods of distance learning are needed to optimize student laboratory experiences. The sudden transition to a remote format and adjusting to a new learning environment has proven to be difficult for both students and faculty. It has also been established throughout the pandemic that students perform substantially worse in on-line coursework compared with traditional, in-person classes. Students in a general chemistry course were introduced to innovative asynchronous lab modules that could be performed at home with the additional opportunity of conducting statistical analysis tests. These modules utilize discussion boards, graphing assessments, and labs to teach students how to perform different statistical tests and to familiarize students with the DataClassroom, Google Sheets, and Microsoft Excel platforms. This asynchronous learning format will promote both overall student engagement in STEM courses and student understanding of statistical analysis, thus exhibiting the potential to implement these modules in future undergraduate STEM coursework.

The student laboratory report genre: A genre analysis

© 2016 Elsevier Ltd This article provides a move analysis of the student laboratory report, a genre which is central to science and engineering study, and to which students may have had little prior exposure. Using a data set of 60 highly-graded laboratory reports from the BAWE corpus (British Academic Writing in English, Gardner & Nesi, 2013), moves are described, together with typical linguistic features. Laboratory report moves are compared with moves previously identified in empirical research articles (RAs), a genre which has the same macrostructure and also presents experimental findings. The different writer-reader relationships and different purposes in these genres (pedagogical in the laboratory report, and presenting new research in RAs) result in some significant differences in the realization of moves. The findings are potentially useful to teachers of science writing.

The student laboratory report genre: A genre analysis

© 2016 Elsevier Ltd This article provides a move analysis of the student laboratory report, a genre which is central to science and engineering study, and to which students may have had little prior exposure. Using a data set of 60 highly-graded laboratory reports from the BAWE corpus (British Academic Writing in English, Gardner & Nesi, 2013), moves are described, together with typical linguistic features. Laboratory report moves are compared with moves previously identified in empirical research articles (RAs), a genre which has the same macrostructure and also presents experimental findings. The different writer-reader relationships and different purposes in these genres (pedagogical in the laboratory report, and presenting new research in RAs) result in some significant differences in the realization of moves. The findings are potentially useful to teachers of science writing.

Analysis of factors that affect the nature and quality of student laboratory argumentation

Previous research on student argumentation in the chemistry laboratory has emphasized the evaluation of argument quality or the characterization of argument structure (i.e., claims, evidence, rationale). In spite of this...

PENGEMBANGAN INSTRUMEN PENILAIAN KINERJA UNTUK MENGUKUR KOMPETENSI LABORATORIUM MAHASISWA DALAM KEGIATAN PRAKTIKUM FISIOLOGI TUMBUHAN

This study aims to: 1) determine the appropriateness of practicum performance appraisal instruments; and 2) find out whether there are differences in competency of laboratory skills among students. The instrument development procedure refers to the 4-D model with a research trial design using one shoot case study. Before the performance appraisal instrument was applied to 77 semester IV students Department of Biology Education, FSTT, Mandalika University of Education, a validation test was first conducted by an expert. Data collection techniques using validation, testing, and observation. The instruments used in this study were instrument validation sheets, observation sheets of action laboratory skills and tests of thinking laboratory skills. Data analysis using the one way ANOVA test continued with the LSD test. The results showed that: 1) the feasibility of performance evaluation instruments developed in the valid and reliable categories; and 2) there were significant differences in laboratory skills in the three groups at ɑ = 5% in the sufficient category. The conclusion of this research is the performance assessment instrument developed can be used to train student laboratory skills. The implications of this research are expected to contribute to improving the quality of practicum assessment instruments in learning in the laboratory.