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Elastic Vector Solitons in Soft Architected Materials

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Author(s): B. Deng, J. R. Raney, V. Tournat, and K. Bertoldi

Experiments, simulations, and theory demonstrate that elastic vector solitons can propagate in a soft structured material consisting of a network of squares connected by thin and deformable ligaments.


[Phys. Rev. Lett. 118, 204102] Published Wed May 17, 2017

Elastic Vector Solitons in Soft Architected Materials

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Author(s): B. Deng, J. R. Raney, V. Tournat, and K. Bertoldi

Experiments, simulations, and theory demonstrate that elastic vector solitons can propagate in a soft structured material consisting of a network of squares connected by thin and deformable ligaments.


[Phys. Rev. Lett. 118, 204102] Published Wed May 17, 2017

First of many

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Operations image of the week: On this day in 1968, Europe’s ESRO-2B satellite became the first mission controlled from what is today ESA’s European Space Operations Centre

The benefits of getting confused

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Getting confused (in lessons) is not necessarily a bad thing. In some physics lessons it may well be
inevitable. Understanding may or may not be possible but thinking it through will always help, and
this how learning takes place. Confusion need not …

Fun with optical fibres

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Optical fibres play a very crucial role in today’s technologies. Academic courses in optical fibres
start at the undergraduate level. Nevertheless, student’s curiosity towards optical fibres starts
from the school level. In this paper, some fun e…

The benefits of getting confused

by

Getting confused (in lessons) is not necessarily a bad thing. In some physics lessons it may well be
inevitable. Understanding may or may not be possible but thinking it through will always help, and
this how learning takes place. Confusion need not …

Fun with optical fibres

by

Optical fibres play a very crucial role in today’s technologies. Academic courses in optical fibres
start at the undergraduate level. Nevertheless, student’s curiosity towards optical fibres starts
from the school level. In this paper, some fun e…

Tartu ülikool korraldab esimese Euroopa füüsikaolümpiaadi

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20.-24. mail toimub Tartu ülikooli teaduskooli vedamisel esimene Euroopa füüsikaolümpiaad EuPhO2017. Tegemist on üleeuroopalise koolinoortele suunatud rahvusvahelise ainevõistlusega, millel on potentsiaali muutuda korrapäraselt toimuvaks suursündmuseks. Idee Euroopa füüsikaolümpiaadi traditsiooni loomisest hakkas Euroopa riikide rahvusvahelise füüsikaolümpiaadi võrgustikus levima juba aastal 2000, mil Indoneesias korraldati esimene Aasia füüsikaolümpiaad (Lõuna-Ameerikas on analoogne võistlus toimunud juba alates 1991. aastast). […]

Earth from Space

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Chair of the DLR German Aerospace Center Executive Board, Pascale Ehrenfreund, and ESA’s Josef Aschbacher discuss their organisations’ complementary Earth observation activities

Earth from Space

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Chair of the DLR German Aerospace Center Executive Board, Pascale Ehrenfreund, and ESA’s Josef Aschbacher discuss their organisations’ complementary Earth observation activities

Nuclear Physics Around the Unitarity Limit

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Author(s): Sebastian König, Harald W. Grießhammer, H.-W. Hammer, and U. van Kolck

Many features of three- and four-nucleon nuclei are well explained by a perturbative expansion around the unitarity limit. It is conjectured that this approach could work for heavier nuclei as well.


[Phys. Rev. Lett. 118, 202501] Published Mon May 15, 2017

Nuclear Physics Around the Unitarity Limit

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Author(s): Sebastian König, Harald W. Grießhammer, H.-W. Hammer, and U. van Kolck

Many features of three- and four-nucleon nuclei are well explained by a perturbative expansion around the unitarity limit. It is conjectured that this approach could work for heavier nuclei as well.


[Phys. Rev. Lett. 118, 202501] Published Mon May 15, 2017

Extra X-rays

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Space Science image of the Week: ESA’s XMM-Newton detects X-ray sources sky-wide as it moves between targets

Adaptive or Transactional Leadership in Current Higher Education: A Brief Comparison

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Higher education institutions operate in a complex environment that includes influence from external factors, new technologies for teaching and learning, globalization, and changing student demographics to name a few. Maneuvering such complexity and change requires a leadership strategy that is flexible and supportive. This paper reviews two leadership theories in reference to this need: adaptive leadership theory and transactional leadership theory. Three conceptual categories of environmental readiness, leadership complexity, and followers’ motivation are used as points of comparison for each theory. A recommendation is made for leadership strategy in higher education institutions based on this comparison.

Talent Management Implementation at an Open Distance E-Learning Higher Educational Institution: The Views of Senior Line Managers

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The war for talent remains a challenge that many organisations face but more so for distance education institutions to deliver on its mandate to provide effective online academic offerings. The question that remains is: How can intellectual capital be managed effectively in order to recruit and retain talent that is necessary for success?  This study was conducted at a mega open and distance learning institution, and this institution has identified talent management as one of the key strategic initiatives to ensure institutional strategic goal attainment and adopted an inclusive/developable talent approach as its framework. The aim of this article is to report on the perceptions of senior line managers regarding their experience with implementing the talent management strategy in their operational areas at the institution. This study adopted a qualitative approach and purposive sampling was used to select interviewees. The population group included chairpersons of 26 talent committees who are senior line managers and 11 of them were interviewed. Participants were of the opinion that policies and strategies do not always support the implementation of talent management in their respective environments. The findings show that although the university embraces the inclusive/developable talent approach in its strategy, the impact thereof is inhibited by a lack of methodological implementation, a lack of integration of supporting Human Resources policies with talent management, and insular line manager discernment.

Moving Technology-Enhanced-Learning Forward: Bridging Divides through Leadership

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A study of academics and professional staff engaged in the emerging field of Technology Enhanced Learning (TEL) reveal three areas of significant difference in reference to perspectives about TEL. These differences rest on the following individual characteristics: 1) research areas and competencies, 2) academic level, and 3) attitudes towards teaching. While the number of respondents is small, the data set is rich due to a diverse group of respondents. Leadership strategy that rests on appreciative inquiry to draw these perspectives together could begin with implementation of five ways of working collaboratively: acknowledge unique skills different from one’s own, understand driving forces from different vantage points, learn enough about other views to show respect, identify common goals and incentives for all, and include people from all relevant groups.

Approaches Reflected in Academic Writing MOOCs

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Since it was first introduced in 2008, Massive Open Online Courses (MOOCs) have been attracting a lot of interest. Since then, MOOCs have emerged as powerful platforms for teaching and learning academic writing. However, there has been no detailed investigation of academic writing MOOCs. As a result, much uncertainty still exists about the differences of writing MOOCs compared with traditional types of writing instruction in the classroom. Drawing on historical emphases in writing instruction, five approaches are illustrated: skills, creative writing, process, social practice, and a socio-cultural perspective. This study uses data from six academic writing MOOCs to examine what approaches are revealed within their writing instructions. Focusing on a group of six academic writing MOOCs at college level, attributes and features of writing MOOCs were explored by analyzing syllabi, video lectures, and assignments. Overall, the study found that these academic writing MOOCs stick to a traditional model of teaching writing, “writing as skills.” These findings suggest that instructors who teach academic writing through online platforms showed that their immediate concerns were not a social practice or socio-cultural context. Rather, teaching and learning of grammatical accuracy and surface features of texts at college level appear to be best purpose of academic writing MOOCs.

Understanding Learners’ Motivation and Learning Strategies in MOOCs

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MOOCs (Massive Open Online Courses) have changed the way in which OER (Open Educational Resources) are bundled by teachers and consumed by learners. MOOCs represent an evolution towards the production and offering of structured quality OER. Many institutions that were initially reluctant to providing OER have, however, joined the MOOC wave. Nevertheless, MOOCs detractors strongly criticize their high dropout rates. The dropout rate is a commonly accepted metric of success for traditional education, but it may not be as suitable when dealing with OER, in general, and with MOOCs, in particular, since learners’ motivations to take a course are very diverse, and certain self-regulated learning strategies are required to tackle the lack of personalized tutoring and keep pace in the course. This paper presents an empirical study on the motivation and learning strategies of MOOC learners. Six thousand three hundred and thirty-five learners from 160 countries answered a self-report 7-point Likert-type questionnaire based on the Motivated Strategies for Learning Questionnaire (MSLQ) as part of a MOOC titled Introduction to Programming with Java. Results indicate that learners were highly motivated and confident to do well in the course. Learning strategies, however, can be improved, especially regarding time management.

Employing the EPEC Hierarchy of Conditions (Version II) To Evaluate the Effectiveness of Using Synchronous Technologies with Multi-Location Student Cohorts in the Tertiary Education Setting

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As e-learning maintains its popularity worldwide, and university enrolments continue to rise, online tertiary level coursework is increasingly being designed for groups of distributed learners, as opposed to individual students. Many institutions struggle with incorporating all facets of online learning and teaching capabilities with the range and variety of software tools available to them. This study used the EPEC Hierarchy of Conditions (ease of use, psychologically safe environment, e-learning self-efficacy, and competence) for E-Learning/E-Teaching Competence (Version II) to investigate the effectiveness of an online synchronous platform to train pre-service teachers studying in groups at multiple distance locations called satellite campuses. The study included 58 pre-service teachers: 14 who were online using individual computers and 44 joining online, sitting physically together in groups, at various locations. Students completed a survey at the conclusion of the coursework and data were analyzed using a mixed methods approach.

This study’s findings support the EPEC model applied in this context, which holds that success with e-learning and e-teaching is dependent on four preconditions: 1) ease of use, 2) psychologically safe environment, 3) e-learning self-efficacy, and 4) competency. However, the results also suggest two other factors that impact the success of the online learning experience when working with various sized groups. The study demonstrates that the effectiveness of a multi-location group model may not be dependent only on the EPEC preconditions but also the effectiveness of the instructor support present and the appropriateness of the tool being implemented. This has led to the revised EPEC Hierarchy of Conditions for E-Learning/E-Teaching Competence (Version III).

The Online Student Connectedness Survey: Evidence of Initial Construct Validity

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The Online Student Connectedness Survey (OSCS) was introduced to the academic community in 2012 as an instrument designed to measure feelings of connectedness between students participating in online degree and certification programs. The purpose of this study was to examine data from the instrument for initial evidence of validity and reliability and to establish a nomological network between the OSCS, the Classroom Connectedness Survey (CCS), and the Community of Inquiry Survey (COI), which are similar instruments in the field. Results provided evidence of factor validity and reliability.  Additionally, statistically and practically significant correlations were demonstrated between factors contained in the OSCS and established instruments measuring factors related to student connectedness.  These results indicate that for the sample used in this study, the OSCS provides data that are valid and reliable for assessing feelings of connection between participants in online courses at institutions of higher learning.

Novel use of satnav saves precious water

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Water conservation is a growing concern globally, and particularly for farmers in the USA, where decades of irrigating huge fields has depleted vital resources of fresh surface water and groundwater. An ESA spin-off that can help to preser…

Novel use of satnav saves precious water

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Water conservation is a growing concern globally, and particularly for farmers in the USA, where decades of irrigating huge fields has depleted vital resources of fresh surface water and groundwater. An ESA spin-off that can help to preser…

Uintah Basin

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Earth observation image of the week: the border of the US states Utah and Colorado is pictured in this Sentinel-2 image, also featured on the Earth from Space video programme

Towards a quantum internet

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A long-range quantum communication network is among the most promising applications of emerging
quantum technologies. We discuss the potential of such a quantum internet for the secure
transmission of classical and quantum information, as well as the…

Towards a quantum internet

by

A long-range quantum communication network is among the most promising applications of emerging
quantum technologies. We discuss the potential of such a quantum internet for the secure
transmission of classical and quantum information, as well as the…

The physics of singing vibrato

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A spectrogram of a singer’s vibrato presents a striking way to introduce students to frequency,
Fourier spectra, and modulation. Vibrato is discussed from the perspectives of the physicist and the
musician. A dramatic spectrogram is included where …

Galileo chain thermometer

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This relatively rare thermometer has a rather unusual display: lower temperatures are located at the
top of the scale, higher ones at the bottom. A sphere on a chain floats in a suitable liquid,
sinking at high temperatures when the density of the li…

Galileo chain thermometer

by

This relatively rare thermometer has a rather unusual display: lower temperatures are located at the
top of the scale, higher ones at the bottom. A sphere on a chain floats in a suitable liquid,
sinking at high temperatures when the density of the li…

The physics of singing vibrato

by

A spectrogram of a singer’s vibrato presents a striking way to introduce students to frequency,
Fourier spectra, and modulation. Vibrato is discussed from the perspectives of the physicist and the
musician. A dramatic spectrogram is included where …