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Impact of mass gain, tailwind and age on the performance of Usain Bolt from Beijing 2008 to Rio 2016

17.08.2017 by Kaido Reivelt

Despite the impressiveness of the sprints run by Usain Bolt, the question naturally arises of why he
has not been able to break the 100 m sprint world record he set in Berlin (2009). In this paper, we
address such a query by considering Bolt’s cond…

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A quantitative experiment on the fountain effect in superfluid helium

17.08.2017 by Kaido Reivelt

Superfluid helium, a state of matter existing at low temperatures, shows many remarkable properties.
One example is the so called fountain effect, where a heater can produce a jet of helium. This
converts heat into mechanical motion; a machine with n…

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Impact of mass gain, tailwind and age on the performance of Usain Bolt from Beijing 2008 to Rio 2016

17.08.2017 by Kaido Reivelt

Despite the impressiveness of the sprints run by Usain Bolt, the question naturally arises of why he
has not been able to break the 100 m sprint world record he set in Berlin (2009). In this paper, we
address such a query by considering Bolt’s cond…

Filed Under: RSS Füüsikaharidus

Visualisation of charge dynamics when water droplets move off a hydrophobic surface

17.08.2017 by Kaido Reivelt

The Kelvin water drop generator is often used for educational purposes to visualise how charge is
transferred when water drops separate from a solid. Here, we discuss an alternative and simpler
setup, which allows one to visualise the charge transfer…

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A quantitative experiment on the fountain effect in superfluid helium

17.08.2017 by Kaido Reivelt

Superfluid helium, a state of matter existing at low temperatures, shows many remarkable properties.
One example is the so called fountain effect, where a heater can produce a jet of helium. This
converts heat into mechanical motion; a machine with n…

Filed Under: RSS Füüsikaharidus

Calibration of gamma-ray detectors using Gaussian photopeak fitting in the multichannel spectra with a LabVIEW-based digital system

17.08.2017 by Kaido Reivelt

This paper reports on the development of a gamma-ray spectroscopic system for the (i) recording and
(ii) processing of spectra. The utilized data read-out unit consists of a PCI digital oscilloscope,
personal computer and LabVIEW™ programming envir…

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Dynamics of a particle on an axisymmetric surface under gravitational force: a geometric approach

17.08.2017 by Kaido Reivelt

In this paper the problem of a particle constrained to move on an axisymmetric surface embedded in
three-dimensional Euclidean space, under the influence of a gravitational field, is addressed from a
geometrical point of view. Using a covariant geome…

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Demonstration of acoustic resonances in a cylindrical cavity applying the photoacoustic technique

17.08.2017 by Kaido Reivelt

In this work we present some experiments which can be performed in college or on the first courses
of university to acquire knowledge about resonant acoustical phenomena in closed cavities in a
tangible way, through experiments based on the photoacou…

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The physics of osmotic pressure

16.08.2017 by Kaido Reivelt

Osmosis drives the development of a pressure difference of many atmospheres between a dilute
solution and pure solvent with which it is in contact through a semi-permeable membrane. The
educational importance of this paper is that it presents a novel…

Filed Under: RSS Füüsikaharidus

Teaching students about informatics and astronomy using real data for detection of asteroids

16.08.2017 by Kaido Reivelt

In this paper we approach the astronomy teaching process for students in computer sciences through a
controlled investigation method using real astronomical data, including data reduction and quality
control of the astrometry of near-Earth asteroids….

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Do it yourself: optical spectrometer for physics undergraduate instruction in nanomaterial characterization

16.08.2017 by Kaido Reivelt

In this paper, we report on a homemade optical spectrometer using diffraction grating and image
processing techniques. This device was designed to produce spectral images that could then be
processed by measuring signal strength (pixel intensity) to …

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Chaotic He-Ne laser

16.08.2017 by Kaido Reivelt

A He-Ne laser is an example of a class A laser, which can be described by a single nonlinear
differential equation of the complex electric field. This laser system has only one degree of
freedom and is thus inherently stable. A He-Ne laser can be dri…

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Chaotic or just complicated? Ball bouncing down the stairs

16.08.2017 by Kaido Reivelt

The aim of this study is to investigate the bouncing dynamics of a small elastic ball on a
rectangular stairway and to determine if its dynamics is chaotic. We derive a simple nonlinear
recursion for the coordinates of the collisions from which the t…

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Alternative routes to the retarded potentials

16.08.2017 by Kaido Reivelt

Two procedures to introduce the familiar retarded potentials of Maxwell’s equations are reviewed.
The first well-known procedure makes use of the Lorenz-gauge potentials of Maxwell’s equations. The
second less-known procedure applies the retarded…

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Teaching students about informatics and astronomy using real data for detection of asteroids

16.08.2017 by Kaido Reivelt

In this paper we approach the astronomy teaching process for students in computer sciences through a
controlled investigation method using real astronomical data, including data reduction and quality
control of the astrometry of near-Earth asteroids….

Filed Under: RSS Füüsikaharidus

Chaotic or just complicated? Ball bouncing down the stairs

16.08.2017 by Kaido Reivelt

The aim of this study is to investigate the bouncing dynamics of a small elastic ball on a
rectangular stairway and to determine if its dynamics is chaotic. We derive a simple nonlinear
recursion for the coordinates of the collisions from which the t…

Filed Under: RSS Füüsikaharidus

Chaotic He-Ne laser

16.08.2017 by Kaido Reivelt

A He-Ne laser is an example of a class A laser, which can be described by a single nonlinear
differential equation of the complex electric field. This laser system has only one degree of
freedom and is thus inherently stable. A He-Ne laser can be dri…

Filed Under: RSS Füüsikaharidus

Alternative routes to the retarded potentials

16.08.2017 by Kaido Reivelt

Two procedures to introduce the familiar retarded potentials of Maxwell’s equations are reviewed.
The first well-known procedure makes use of the Lorenz-gauge potentials of Maxwell’s equations. The
second less-known procedure applies the retarded…

Filed Under: RSS Füüsikaharidus

Do it yourself: optical spectrometer for physics undergraduate instruction in nanomaterial characterization

16.08.2017 by Kaido Reivelt

In this paper, we report on a homemade optical spectrometer using diffraction grating and image
processing techniques. This device was designed to produce spectral images that could then be
processed by measuring signal strength (pixel intensity) to …

Filed Under: RSS Füüsikaharidus

The physics of osmotic pressure

16.08.2017 by Kaido Reivelt

Osmosis drives the development of a pressure difference of many atmospheres between a dilute
solution and pure solvent with which it is in contact through a semi-permeable membrane. The
educational importance of this paper is that it presents a novel…

Filed Under: RSS Füüsikaharidus

Revisiting Sensemaking: The case of the Digital Decision Network Application (DigitalDNA)

16.08.2017 by Kaido Reivelt

During this age of data proliferation, heavy reliance is placed on data visualisation to support users in making sense of vast quantities of information. Informational Dashboards have become the must have accoutrement for Higher Education institutions …

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Massive, Open, Online, and National? A Study of How National Governments and Institutions Shape the Development of MOOCs

16.08.2017 by Kaido Reivelt

We explore interpretations of MOOCs around the globe and, in particular, interpretations of MOOCs in Norway. Based on a review of previous studies relevant to these topics, we present two contrasting views on the emergence and development of MOOCs, nam…

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Nonnative English-Speaking Students’ Lived Learning Experiences With MOOCs in a Regular College Classroom

16.08.2017 by Kaido Reivelt

The goal of this study was to gain in-depth understanding about nonnative English-speaking students’ lived experiences with massive open online courses (MOOCs) in a regular college classroom. Phenomenological methodology was used to examine those experiences in 24 Korean college students. Individual interviews, an open-ended online survey, observation notes, online weekly journal entries, and social media constituted the data sources. Findings show that students’ lived experiences included (a) wonder and interest, (b) novel learning and teaching practices, (c) preference for video style, (d) learning strategies, (e) motivation to learn, and (f) need for face-to-face interaction. Implications for integrating a MOOC into a regular college course are also presented.

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Learner Behaviour in a MOOC Practice-oriented Course: In Empirical Study Integrating TAM and TPB

16.08.2017 by Kaido Reivelt

Few practice-oriented courses are currently integrated into online learning platforms, such as OpenCourseWare, Khan Academy, and Massive Open Online Courses (MOOCs). It is worthwhile to explore how learners respond to information technology and new teaching methods when practice-oriented course are placed online. Therefore, this study probes learner willingness to participate in a practice-oriented course distributed through a MOOC platform, investigating relationships among perceptions, behavioural intentions, and actual behaviour. The current research framework integrates the Technology Acceptance Model and the Theory of Planned Behavior as its core theoretical basis. Empirical data were collected through a cross-section survey. All participants were students of 2D Animation Production, with a total of 272 respondents. The questionnaire data used Partial Least Squares Structural Equation Modeling (PLS-SEM) analysis. Results show: (a) attitude exerted the greatest influence on learners’ behavioural intention; (b) learners’ perceived behaviour control, subjective norm, and attitude, which directly and positively influence their behavioural intention; (c) behavioural intention exhibited dual mediation effects; (d) behavioural intention positively influenced actual behaviour in the C-TAM-TPB model, with a high level of overall model fit.

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Trends and Patterns in Massive Open Online Courses: Review and Content Analysis of Research on MOOCs (2008-2015)

16.08.2017 by Kaido Reivelt

To fully understand the phenomenon of massive open online courses (MOOCs), it is important to identify and map trends and patterns in research on MOOCs. This study does so by reviewing 362 empirical articles published in peer-reviewed journals from 200…

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Khan Academy Videos in Chinese: A Case Study in OER Revision

16.08.2017 by Kaido Reivelt

Over the past decade, great progress has been made in improving the quality and availability of Open Educational Resources (OER). OER proponents often discuss the ability for users to revise and remix OER to make them more suitable for local contexts; …

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Supporting Capacity Building in Health Service Provision in Eritrea via Distance Learning Master’s Programmes: The Challenges and Rewards

16.08.2017 by Kaido Reivelt

A qualitative study investigating the experiences and effects on practice of Eritrean healthcare professionals studying for a postgraduate degree by distance learning is reported. The programme is delivered via online learning together with in-country …

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Using Learning Analytics for Preserving Academic Integrity

16.08.2017 by Kaido Reivelt

This paper presents the results of integrating learning analytics into the assessment process to enhance academic integrity in the e-learning environment. The goal of this research is to evaluate the computational-based approach to academic integrity. The machine-learning based framework learns students’ patterns of language use from data, providing an accessible and non-invasive validation of student identities and student-produced content. To assess the performance of the proposed approach, we conducted a series of experiments using written assignments of graduate students. The proposed method yielded a mean accuracy of 93%, exceeding the baseline of human performance that yielded a mean accuracy rate of 12%. The results suggest a promising potential for developing automated tools that promote accountability and simplify the provision of academic integrity in the e-learning environment.

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An Evaluation of the Impact of “Learning Design” on the Distance Learning and Teaching Experience

16.08.2017 by Kaido Reivelt

This paper evaluates the implementation of Learning Design on the production of a core FHEQ level 6 (QAA, 2008)[1] unit of study at a UK distance learning institution.  By comparing student (n=656) and tutor (n=42) survey data with questionnaire responses (n=9) from the unit of study’s core production team, this paper assesses the impact of incorporating the Open University Learning Design Initiative (OULDI) methodology into curriculum production by looking specifically at barriers and facilitators in the application of Learning Design and its impact on module development, delivery, and the resulting student and tutor learning experience.  With a focus on developing and embedding Learning Design into the curriculum planning and production process, the paper explores how lessons learned from this experience have helped to guide and inform the future implementation of Learning Design into module and qualification level frameworks. 


[1] Frameworks for Higher Education Qualifications in England, Wales and Northern Ireland, produced by the Quality Assurance Agency for Higher Education (2008) – this framework provides a reference point for all Higher Education providers for the setting and assessing of academic standards.

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The Effects of Extraneous Load on the Relationship Between Self-Regulated Effort and Germane Load Within an E-Learning Environment

16.08.2017 by Kaido Reivelt

Online instructors need to avoid unclear and confusing explanations of content, which can reduce the quality of learning. Extraneous load is reflective of poor instruction, in that it directs student effort towards processing information that does not …

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The Use of Social Media in E-Learning: A Metasynthesis

16.08.2017 by Kaido Reivelt

The adoption of social media in e-learning signals the end of distance education as we know it in higher education. However, it appears to have very little impact on the way in which open and distance learning (ODL) institutions are functioning. Earlie…

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Student and Faculty Perceptions of OpenStax in High Enrollment Courses

16.08.2017 by Kaido Reivelt

As public funding for higher education decreases and the cost to students to attend college increases, universities are searching for strategies that save students money while also increasing their chances for success. Using free online textbooks is one such strategy, and the OpenStax College initiative at Rice University is one of the most widely recognized producers of such materials. Through a mixed method approach, this article examines the student and faculty experiences of adopting and using an OpenStax textbook. With 1,299 student participants, it was found that students greatly value the quality, attributes, and the cost of the OpenStax Biology textbook, though minor concerns were raised about its online format. Faculty adoption of a free textbook provides unique opportunities for course redesign and improvement, and the approach employed in this course transformation context resulted in clearly articulated learning outcomes, a fully realized structure in the course’s learning management system, and improvements to instructional practice. The student, faculty, and course benefits of this study offer a compelling argument for the adoption of high quality open education resources (OER) in public higher education contexts.

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Investigating Students’ Perceptions of Motivating Factors of Online Class Discussions

16.08.2017 by Kaido Reivelt

One of the goals of teacher education is to prepare our citizens to communicate in a variety of ways. In our present society, communication using digital media has become essential. Although online discussions are a common component of many online courses, engaging students in online discussions has been a challenge. This study queried 86 educators in a math/science teacher education graduate program to examine their perceptions on the factors that motivate them to participate in online discussions.

The results revealed a pragmatic outlook on online education. In terms of intrinsic versus extrinsic motivation, the participants’ main motivation to participate in online class discussions was extrinsic (85.88%), specifically so that they could earn an acceptable participation grade. With regards to discussion grouping formats, they preferred small group discussions (81%) which could facilitate their ability to develop rapport with a small group of fellow classmates over whole class discussion (38.83%). With respect to discussion facilitation, they focused on the practical need to have the instructor to answer their questions about course assignments (67.06%) over online open discussion without a given topic (35.72%). Next, when asked about discussion question types based on Bloom’s taxonomy, their strongest preference reflected a desire for application (89.54%) questions which would facilitate their ability to use theories discussed in class in their daily work as educators. Through collaboration with twenty-first-century learners, online education can use data-driven decision making to help transform online discussion from being the least desirable component of online courses to a more relevant, instructional medium.    

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Editorial – Volume 18, Issue 5

16.08.2017 by Kaido Reivelt

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Openness and Praxis: Exploring the Use of Open Educational Practices in Higher Education

16.08.2017 by Kaido Reivelt

Open educational practices (OEP) is a broad descriptor of practices that include the creation, use, and reuse of open educational resources (OER) as well as open pedagogies and open sharing of teaching practices. As compared with OER, there has been little empirical research on individual educators’ use of OEP for teaching in higher education. This research study addresses that gap, exploring the digital and pedagogical strategies of a diverse group of university educators, focusing on whether, why, and how they use OEP for teaching. The study was conducted at one Irish university; semi-structured interviews were carried out with educators across multiple disciplines. Only a minority of educators used OEP. Using constructivist grounded theory, a model of the concept “Using OEP for teaching” was constructed showing four dimensions shared by open educators: balancing privacy and openness, developing digital literacies, valuing social learning, and challenging traditional teaching role expectations. The use of OEP by educators is complex, personal, and contextual; it is also continually negotiated. These findings suggest that research-informed policies and collaborative and critical approaches to openness are required to support staff, students, and learning in an increasingly complex higher education environment.

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Repositories of Open Educational Resources: An Assessment of Reuse and Educational Aspects

16.08.2017 by Kaido Reivelt

This article provides an overview of the current state of repositories of open educational resources (ROER) in higher education at international level. It analyses a series of educational indicators to determine whether ROER can meet the specific needs of the education context, and to clarify understanding of the reuse of open educational resources (OER) provided by ROER. The aim of the study is to assess ROER by combining these two perspectives, and to form a basis for discussion among the universities that are responsible for these repositories.

The method was based on content analysis and consisted of two phases: an exploration of international sources, and an analysis of 110 ROER using the proposed set of indicators. The results focus on data from the analysis of ROER websites and some models of good practices. They are presented according to three core dimensions for evaluating ROER: general factors to establish types of ROER, a focus on drivers for OER reuse, and a focus on educational aspects.  It was found that most of the ROER that included one or more of the proposed reuse indicators were created exclusively for educational resources. Educational aspects are not yet firmly embedded into ROER. The few repositories that seem to have successfully included them are those that provide other educational metadata and use educational standards.

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Rotating electrical machines: Poynting flow

15.08.2017 by Kaido Reivelt

This paper presents a complementary approach to the traditional Lorentz and Faraday approaches that
are typically adopted in the classroom when teaching the fundamentals of electrical machines—motors
and generators. The approach adopted is based up…

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Rotating electrical machines: Poynting flow

15.08.2017 by Kaido Reivelt

This paper presents a complementary approach to the traditional Lorentz and Faraday approaches that
are typically adopted in the classroom when teaching the fundamentals of electrical machines—motors
and generators. The approach adopted is based up…

Filed Under: RSS Füüsikaharidus

LCR circuit: new simple methods for measuring the equivalent series resistance of a capacitor and inductance of a coil

14.08.2017 by Kaido Reivelt

Equivalent series resistance (ESR) represents the measurement of total energy loss in a capacitor.
In this paper a simple method for measuring the ESR of ceramic capacitors based on the analysis of
the oscillations of an LCR circuit is proposed. It i…

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Energy splitting in a finite periodic multiple-well potential

14.08.2017 by Kaido Reivelt

The low-lying states for a one-dimensional potential consisting of N identical wells are considered,
assuming that the wells are parabolic around the minima. The N localized approximate eigenfunctions,
each of which matches an eigenfunction of the si…

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Digital phonocardiographic experiments and signal processing in multidisciplinary fields of university education

14.08.2017 by Kaido Reivelt

Modern measurement of physical signals is based on the use of sensors, electronic signal
conditioning, analog-to-digital conversion and digital signal processing carried out by dedicated
software. The same signal chain is used in many devices such as…

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Determining the 40 K radioactivity in rocks using x-ray spectrometry

14.08.2017 by Kaido Reivelt

In this paper we propose an experimental method for the determination of potassium-40 ( 40 K)
radioactivity in commercial granite samples using x-ray fluorescence (XRF). The method correlates
the total potassium concentration (yield) in samples deduc…

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Hyphenated analytical techniques for materials characterisation

14.08.2017 by Kaido Reivelt

This topical review will provide a survey of the current state of the art in ‘hyphenated’ techniques
for characterisation of bulk materials, surface, and interfaces, whereby two or more analytical
methods investigating different properties are ap…

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Anharmonic effects in simple physical models: introducing undergraduates to nonlinearity

14.08.2017 by Kaido Reivelt

Given the pervasive character of nonlinearity throughout the physical universe, a case is made for
introducing undergraduate students to its consequences and signatures earlier rather than later. The
dynamics of two well-known systems—a spring and …

Filed Under: RSS Füüsikaharidus

Energy splitting in a finite periodic multiple-well potential

14.08.2017 by Kaido Reivelt

The low-lying states for a one-dimensional potential consisting of N identical wells are considered,
assuming that the wells are parabolic around the minima. The N localized approximate eigenfunctions,
each of which matches an eigenfunction of the si…

Filed Under: RSS Füüsikaharidus

LCR circuit: new simple methods for measuring the equivalent series resistance of a capacitor and inductance of a coil

14.08.2017 by Kaido Reivelt

Equivalent series resistance (ESR) represents the measurement of total energy loss in a capacitor.
In this paper a simple method for measuring the ESR of ceramic capacitors based on the analysis of
the oscillations of an LCR circuit is proposed. It i…

Filed Under: RSS Füüsikaharidus

Hyphenated analytical techniques for materials characterisation

14.08.2017 by Kaido Reivelt

This topical review will provide a survey of the current state of the art in ‘hyphenated’ techniques
for characterisation of bulk materials, surface, and interfaces, whereby two or more analytical
methods investigating different properties are ap…

Filed Under: RSS Füüsikaharidus

Determining the 40 K radioactivity in rocks using x-ray spectrometry

14.08.2017 by Kaido Reivelt

In this paper we propose an experimental method for the determination of potassium-40 ( 40 K)
radioactivity in commercial granite samples using x-ray fluorescence (XRF). The method correlates
the total potassium concentration (yield) in samples deduc…

Filed Under: RSS Füüsikaharidus

Anharmonic effects in simple physical models: introducing undergraduates to nonlinearity

14.08.2017 by Kaido Reivelt

Given the pervasive character of nonlinearity throughout the physical universe, a case is made for
introducing undergraduate students to its consequences and signatures earlier rather than later. The
dynamics of two well-known systems—a spring and …

Filed Under: RSS Füüsikaharidus

Digital phonocardiographic experiments and signal processing in multidisciplinary fields of university education

14.08.2017 by Kaido Reivelt

Modern measurement of physical signals is based on the use of sensors, electronic signal
conditioning, analog-to-digital conversion and digital signal processing carried out by dedicated
software. The same signal chain is used in many devices such as…

Filed Under: RSS Füüsikaharidus

Book: Forces of nature

10.08.2017 by Kaido Reivelt

Description unavailable

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Balanced water!—the answer

10.08.2017 by Kaido Reivelt

In my article (Featonby 2017 Phys. Educ . 52 043009) I asked what happens when the force is
increased on one side of a water-filled container balanced on a rod. Here we explain what happens.

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Aluminium and magnetism—the question

10.08.2017 by Kaido Reivelt

What happens when a strong neodymium magnet is moved beside a pile of aluminum yen, or an aluminum
drink can pull? Will there be any attraction or repulsion? How will the speed of movement or
polarity of the magnet affect any motion that occurs?

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Reviews

10.08.2017 by Kaido Reivelt

Description unavailable

Filed Under: RSS Füüsikaharidus

Balanced water!—the answer

10.08.2017 by Kaido Reivelt

In my article (Featonby 2017 Phys. Educ . 52 043009) I asked what happens when the force is
increased on one side of a water-filled container balanced on a rod. Here we explain what happens.

Filed Under: RSS Füüsikaharidus

Aluminium and magnetism—the question

10.08.2017 by Kaido Reivelt

What happens when a strong neodymium magnet is moved beside a pile of aluminum yen, or an aluminum
drink can pull? Will there be any attraction or repulsion? How will the speed of movement or
polarity of the magnet affect any motion that occurs?

Filed Under: RSS Füüsikaharidus

Reviews

10.08.2017 by Kaido Reivelt

Description unavailable

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Geometric mechanics of ray optics as particle dynamics: refraction index with cylindrical symmetry

8.08.2017 by Kaido Reivelt

Starting from the Fermat principle of geometrical optics, we analyse the ray dynamics in a graded
refractive index system device with cylindrical symmetry and a refractive index that decreases
parabolically with the radial coordinate. By applying Ham…

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Electro-optic control of photographic imaging quality through ‘Smart Glass’ windows in optics demonstrations

8.08.2017 by Kaido Reivelt

An experimental setup allowing the modeling of conditions in optical devices and in the eye at
various degrees of scattering such as cataract pathology in human eyes is presented. The scattering
in cells of polymer-dispersed liquid crystals (PDLCs) a…

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Measurement of the sound absorption coefficient for an advanced undergraduate physics laboratory

8.08.2017 by Kaido Reivelt

We present a simple experiment that allows advanced undergraduates to learn the basics of the
acoustic properties of materials. The impedance tube-standing wave method is applied to study the
normal absorption coefficient of acoustics insulators. The…

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Analyzing collisions in classical mechanics using mass–momentum diagrams

8.08.2017 by Kaido Reivelt

We show the value of mass–momentum diagrams for analyzing collision problems in classical mechanics
in one dimension. Collisions are characterized by the coefficient of restitution and the momenta of
the interacting particles both before and after …

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Equilibrium charge distribution on a finite straight one-dimensional wire

8.08.2017 by Kaido Reivelt

The electrostatic properties of uniformly charged regular bodies are prominently discussed on
college-level electromagnetism courses. However, one of the most basic problems of electrostatics
that deals with how a continuous charge distribution reach…

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Investigating wireless power transfer

8.08.2017 by Kaido Reivelt

Understanding Physics is a great end in itself, but is also crucial to keep pace with developments
in modern technology. Wireless power transfer, known to many only as a means to charge electric
toothbrushes, will soon be commonplace in charging phon…

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Revisiting the ‘unmixing experiment’ through argumentation

8.08.2017 by Kaido Reivelt

This paper focuses on a series of activities for students at middle school to college level,
designed to instill a sound understanding of fluids and the properties of fluids. The first
activities investigate diffusion and molecular size and these are…

Filed Under: RSS Füüsikaharidus

How to make a soft, rough surface transparent

8.08.2017 by Kaido Reivelt

A transparent elastomer is made opaque by making one of its surfaces rough. By squeezing the rough
surface against a piece of glass, the roughness is smoothed out and the elastomer becomes
transparent.

Filed Under: RSS Füüsikaharidus

Revisiting the ‘unmixing experiment’ through argumentation

8.08.2017 by Kaido Reivelt

This paper focuses on a series of activities for students at middle school to college level,
designed to instill a sound understanding of fluids and the properties of fluids. The first
activities investigate diffusion and molecular size and these are…

Filed Under: RSS Füüsikaharidus

Investigating wireless power transfer

8.08.2017 by Kaido Reivelt

Understanding Physics is a great end in itself, but is also crucial to keep pace with developments
in modern technology. Wireless power transfer, known to many only as a means to charge electric
toothbrushes, will soon be commonplace in charging phon…

Filed Under: RSS Füüsikaharidus

How to make a soft, rough surface transparent

8.08.2017 by Kaido Reivelt

A transparent elastomer is made opaque by making one of its surfaces rough. By squeezing the rough
surface against a piece of glass, the roughness is smoothed out and the elastomer becomes
transparent.

Filed Under: RSS Füüsikaharidus

Measurement of the sound absorption coefficient for an advanced undergraduate physics laboratory

8.08.2017 by Kaido Reivelt

We present a simple experiment that allows advanced undergraduates to learn the basics of the
acoustic properties of materials. The impedance tube-standing wave method is applied to study the
normal absorption coefficient of acoustics insulators. The…

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Geometric mechanics of ray optics as particle dynamics: refraction index with cylindrical symmetry

8.08.2017 by Kaido Reivelt

Starting from the Fermat principle of geometrical optics, we analyse the ray dynamics in a graded
refractive index system device with cylindrical symmetry and a refractive index that decreases
parabolically with the radial coordinate. By applying Ham…

Filed Under: RSS Füüsikaharidus

Equilibrium charge distribution on a finite straight one-dimensional wire

8.08.2017 by Kaido Reivelt

The electrostatic properties of uniformly charged regular bodies are prominently discussed on
college-level electromagnetism courses. However, one of the most basic problems of electrostatics
that deals with how a continuous charge distribution reach…

Filed Under: RSS Füüsikaharidus

Analyzing collisions in classical mechanics using mass–momentum diagrams

8.08.2017 by Kaido Reivelt

We show the value of mass–momentum diagrams for analyzing collision problems in classical mechanics
in one dimension. Collisions are characterized by the coefficient of restitution and the momenta of
the interacting particles both before and after …

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Electro-optic control of photographic imaging quality through ‘Smart Glass’ windows in optics demonstrations

8.08.2017 by Kaido Reivelt

An experimental setup allowing the modeling of conditions in optical devices and in the eye at
various degrees of scattering such as cataract pathology in human eyes is presented. The scattering
in cells of polymer-dispersed liquid crystals (PDLCs) a…

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The illusive sound of a Bundengan string

2.08.2017 by Kaido Reivelt

The acoustics of a vibrating string is frequently used as a simple example of how physics can be
applied in the field of art. In this paper we describe a simple experiment and analysis using a
clipped string. This experiment can generate scientific c…

Filed Under: RSS Füüsikaharidus

Just how much do the planets affect the tides?

2.08.2017 by Kaido Reivelt

The influence of the planets, and planetary alignment on the Earth’s tides is addressed. Starting
from Newton’s law of gravitation, the tidal influence of any celestial body is expressed in terms of
its apparent size and its density. From this, p…

Filed Under: RSS Füüsikaharidus

Just how much do the planets affect the tides?

2.08.2017 by Kaido Reivelt

The influence of the planets, and planetary alignment on the Earth’s tides is addressed. Starting
from Newton’s law of gravitation, the tidal influence of any celestial body is expressed in terms of
its apparent size and its density. From this, p…

Filed Under: RSS Füüsikaharidus

The illusive sound of a Bundengan string

2.08.2017 by Kaido Reivelt

The acoustics of a vibrating string is frequently used as a simple example of how physics can be
applied in the field of art. In this paper we describe a simple experiment and analysis using a
clipped string. This experiment can generate scientific c…

Filed Under: RSS Füüsikaharidus

Improving physics teaching materials on sound for visually impaired students in high school

1.08.2017 by Kaido Reivelt

When visually impaired students attend regular high school, additional materials are necessary to
help them understand physics concepts. The time for teachers to develop teaching materials for such
students is scarce. Visually impaired students in re…

Filed Under: RSS Füüsikaharidus

Improving physics teaching materials on sound for visually impaired students in high school

1.08.2017 by Kaido Reivelt

When visually impaired students attend regular high school, additional materials are necessary to
help them understand physics concepts. The time for teachers to develop teaching materials for such
students is scarce. Visually impaired students in re…

Filed Under: RSS Füüsikaharidus

Active learning of geometrical optics in high school: the ALOP approach

1.08.2017 by Kaido Reivelt

A group comparison experiment of two high school classes with pre and post instruction testing has
been carried out to study the suitability and advantages of using the active learning of optics and
photonics (ALOP) curricula in high schools of devel…

Filed Under: RSS Füüsikaharidus

Finding the acceleration and speed of a light-emitting object on an inclined plane with a smartphone light sensor

26.07.2017 by Kaido Reivelt

This study investigates how the acceleration and speed of a light-emitting object on an inclined
plane may be determined using a smartphone’s light sensor. A light-emitting object was released from
the top of an inclined plane and its illuminance v…

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Correlation of understanding of physics and psychological symptoms among high-school students in Greece

26.07.2017 by Kaido Reivelt

Depression may essentially influence cognitive function contributing to poor school performance. The
present study undertakes to determine the existence and strength of correlation between depressive
symptomatology and other mental conditions with th…

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Simple pendulum for blind students

13.07.2017 by Kaido Reivelt

Faced with the need to teach physics to the visually impaired, in this paper we propose a way to
demonstrate the dependence of distance and time in a pendulum experiment to blind students. The
periodic oscillation of the pendulum is translated, by an…

Filed Under: RSS Füüsikaharidus

Teaching physics using Microsoft Excel

6.07.2017 by Kaido Reivelt

Excel is both ubiquitous and easily understandable. Most people from every walk of life know how to
use MS office and Excel spreadsheets. Students are also familiar with spreadsheets. Most students
know how to use spreadsheets for data analysis. Besi…

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Measuring the coefficient of restitution and more: a simple experiment to promote students’ critical thinking and autonomous work

29.06.2017 by Kaido Reivelt

A simple experiment on the determination of the coefficient of restitution of different materials is
taken as the basis of an extendable work that can be done by students in an autonomous way. On the
whole, the work described in this paper would invo…

Filed Under: RSS Füüsikaharidus

The implementation of binding blocks in the classroom

29.06.2017 by Kaido Reivelt

We discuss a series of activities for A-level students which can be carried out using the binding
blocks three dimensional chart of nuclides. The planned activities cover four main sections which
can be linked to the A-level curriculum; nuclear decay…

Filed Under: RSS Füüsikaharidus

Brenda Jennison—1941 to 2017

29.06.2017 by Kaido Reivelt

This is a tribute to acknowledge the contribution made by Brenda Jennison to physics education

Filed Under: RSS Füüsikaharidus

Origins of rolling friction

29.06.2017 by Kaido Reivelt

When a hard object rolls on a soft surface, or vice versa, rolling friction arises from deformation
of the soft object or the soft surface. The friction force can be described in terms of an offset in
the normal reaction force or in terms of energy l…

Filed Under: RSS Füüsikaharidus

Measuring the coefficient of restitution and more: a simple experiment to promote students’ critical thinking and autonomous work

29.06.2017 by Kaido Reivelt

A simple experiment on the determination of the coefficient of restitution of different materials is
taken as the basis of an extendable work that can be done by students in an autonomous way. On the
whole, the work described in this paper would invo…

Filed Under: RSS Füüsikaharidus

The implementation of binding blocks in the classroom

29.06.2017 by Kaido Reivelt

We discuss a series of activities for A-level students which can be carried out using the binding
blocks three dimensional chart of nuclides. The planned activities cover four main sections which
can be linked to the A-level curriculum; nuclear decay…

Filed Under: RSS Füüsikaharidus

Brenda Jennison—1941 to 2017

29.06.2017 by Kaido Reivelt

This is a tribute to acknowledge the contribution made by Brenda Jennison to physics education

Filed Under: RSS Füüsikaharidus

Origins of rolling friction

29.06.2017 by Kaido Reivelt

When a hard object rolls on a soft surface, or vice versa, rolling friction arises from deformation
of the soft object or the soft surface. The friction force can be described in terms of an offset in
the normal reaction force or in terms of energy l…

Filed Under: RSS Füüsikaharidus

Forces on a current-carrying wire in a magnetic field: the macro–micro connection

27.06.2017 by Kaido Reivelt

The classic problem of determining the force on a current-carrying wire in a magnetic field is
critically analysed. A common explanation found in many introductory textbooks is to represent the
force on the wire as the sum of the forces on charge car…

Filed Under: RSS Füüsikaharidus

Forces on a current-carrying wire in a magnetic field: the macro–micro connection

27.06.2017 by Kaido Reivelt

The classic problem of determining the force on a current-carrying wire in a magnetic field is
critically analysed. A common explanation found in many introductory textbooks is to represent the
force on the wire as the sum of the forces on charge car…

Filed Under: RSS Füüsikaharidus

Investigating and improving introductory physics students’ understanding of the electric field and superposition principle

26.06.2017 by Kaido Reivelt

We discuss an investigation of the difficulties that students in a university introductory physics
course have with the electric field and superposition principle and how that research was used as a
guide in the development and evaluation of a resear…

Filed Under: RSS Füüsikaharidus

Investigating and improving introductory physics students’ understanding of the electric field and superposition principle

26.06.2017 by Kaido Reivelt

We discuss an investigation of the difficulties that students in a university introductory physics
course have with the electric field and superposition principle and how that research was used as a
guide in the development and evaluation of a resear…

Filed Under: RSS Füüsikaharidus

Underlining some aspects of the equivalence principle

23.06.2017 by Kaido Reivelt

We want to shed light on some discussed aspects of the principle of equivalence. We consider two
different phases in the evolution of the principle. We pay attention to the fact that some textbooks
do not dwell on the mathematical meaning of ‘local…

Filed Under: RSS Füüsikaharidus

Coefficient of performance of Stirling refrigerators

23.06.2017 by Kaido Reivelt

Stirling coolers transfer heat in or out of the working fluid during all four stages of their
operation, and their coefficient of performance depends on whether the non-isothermal heat exchanges
are performed reversibly or irreversibly. Both of these…

Filed Under: RSS Füüsikaharidus

Coefficient of performance of Stirling refrigerators

23.06.2017 by Kaido Reivelt

Stirling coolers transfer heat in or out of the working fluid during all four stages of their
operation, and their coefficient of performance depends on whether the non-isothermal heat exchanges
are performed reversibly or irreversibly. Both of these…

Filed Under: RSS Füüsikaharidus

Underlining some aspects of the equivalence principle

23.06.2017 by Kaido Reivelt

We want to shed light on some discussed aspects of the principle of equivalence. We consider two
different phases in the evolution of the principle. We pay attention to the fact that some textbooks
do not dwell on the mathematical meaning of ‘local…

Filed Under: RSS Füüsikaharidus

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