scholarly journals The Construction of the Origami Level-n Menger Sponge Complement by the PJS Technique

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 468
Author(s):  
Serena Cicalò

In 2015, the author developed a new origami technique, called PJS technique (where PJS stands for “pleat and join strips”), by which we can construct polycubes, that are polyhedrons composed of elementary cubes, called units, connected face to face. Each strip, pleated in squares, has to cover four faces of a tower of stacked units, called a segment, having as length the number of units that form the tower. Each unit is composed by weaving together three paper strips in the three spatial directions and the length of each strip depends on the length of the segment in each respective direction. The PJS technique allowed the author to build, at the end of 2016, the first specimen of a level-4 origami Menger sponge and three yeas later, the first level-3 complement model. In this paper, we give a formula to compute the number of segments that make up a level-n Menger sponge complement in all directions and consequently, the number of modules needed for each length to build this polycube with the PJS technique.

2019 ◽  
Vol 2 (1) ◽  
pp. 3 ◽  
Author(s):  
Clare E. Thomas

As new digital technologies increasing become standard in tertiary education context, tertiary institutes are tailoring courses to a much more diverse population ranging over wide geographical areas (Heggart & Yoo, 2018; Owayid & Uden, 2014). The use of online technologies, together with compatible digital devices, enables users to access course content and resources from any location at anytime (Ding, Xiong, & Liu, 2015). To account for changes in educational provision, changes to teaching and learning will occur too as institutes increasingly offer online or blended programmes. At Foundation Level 3 face-to-face lectures and tutorials were the main modes of delivery. However, with the adoption of Google Classroom, different opportunities for teaching and learning presented themselves, especially since all teaching and learning resources are accessible online.    The study arises as the organisations use of Google Classroom (GC) as its learning management system (LMS) and the wider Google Suite for Educations (G-Suite) Applications (Apps) had recently been introduced to a range of Foundation Level courses across the regions. The transition from traditional classroom delivery with printed materials to a blended environment, combining face-to-face with online materials, created an ideal opportunity to investigate participants’ learning experiences. In addition, the Foundation Level 3 course offered a student cohort with diverse G-Suite experience, learning needs, digital literacy skills, experience and confidence.  This provided the opportunity to investigate benefits and challenges for teachers and students when introduced to a new teaching and learning environment.   The key aim of the research was to; Examine how Foundation Level 3 students’ and teachers’ experience learning with the newly introduced Google Classroom. The methodology adopted an interpretivist paradigm and incorporated the use of a mixed method design of student surveys and focus group interviews together with individual staff interviews. The findings indicated that the integration of G-Suite Apps to a blended learning environment led to an increase in communication and collaboration for all participants. Students identified increased autonomy when accessing and retrieving digital materials which led to a more self-directed learning approach. Teachers felt their practice had changed as course assessments were designed to maximise the functionality of the different G-Suite Apps. Managing and tracking students online was also an easy and efficient use of time. The research indicated the importance of digital literacy skills for all participants which were closely linked to academic performance. The study helped to reflect on current practices to gain a deeper understanding, so we, as educators, are able to better shape pedagogical practice and enhance students’ learning experiences. A brief overview of the benefits, challenges and recommendations gained from the study will be presented.     References   Ding, J., Xiong, C., & Liu, H. (2015). Construction of a digital learning environment based on cloud computing. British Journal of Educational Technology, 46(6), 1367-1377. https://doi.org/10.1111/bjet.12208 Heggart, K. R., & Yoo, J. (2018). Getting the most from Google Classroom: A pedagogical framework for tertiary educators. Australian Journal of Teacher Education, 43(3). http://doi.org/10.14221/ajte.2018v43n3.9 Owayid, A. M., & Uden, L. (2014). The usage of Google Apps services in Higher Education. Communication in Computer and Information Science, 96-104. https://doi.org/10.1007/978-3-319-10671-7_9


2015 ◽  
Vol 30 (8) ◽  
pp. 909-924 ◽  
Author(s):  
Céleste M. Brotheridge ◽  
Derrick J. Neufeld ◽  
Bruno Dyck

Purpose – The purpose of this paper is to consider the extent to which changes in communication media are associated with changes in the nature of manager-expatriate employee communications. Using an affordance lens, the authors explore how hierarchical level and communication medium interact to influence status dynamics manifested in communication attributes. Design/methodology/approach – The hypothesis was tested with a 2 (hierarchical level)×3 (communication media) multivariate analysis of covariance (experience level) in a sample of 1,193 messages that were transmitted between managers and field employees in a global organization over a ten year period. Findings – The authors found significant interaction effects between communication media and hierarchical level on communication attributes such that changes in communication media intensified status differences between managers and their employees. Research limitations/implications – Communications media may be appropriated differently depending on one’s hierarchical level. Practical implications – Managers should adopt new communication media more consciously given their potential influence of how people communicate. Originality/value – Unlike many computer-mediated communications (CMC) effects studies that compare face-to-face communications with CMC or employ self-report questionnaires or laboratory designs with student samples, this study examines a complete set of manager-employee communications over an extended period of time.


1992 ◽  
Vol 1 (2) ◽  
pp. 11-12 ◽  
Author(s):  
James Jerger
Keyword(s):  

2014 ◽  
Vol 23 (3) ◽  
pp. 132-139 ◽  
Author(s):  
Lauren Zubow ◽  
Richard Hurtig

Children with Rett Syndrome (RS) are reported to use multiple modalities to communicate although their intentionality is often questioned (Bartolotta, Zipp, Simpkins, & Glazewski, 2011; Hetzroni & Rubin, 2006; Sigafoos et al., 2000; Sigafoos, Woodyatt, Tuckeer, Roberts-Pennell, & Pittendreigh, 2000). This paper will present results of a study analyzing the unconventional vocalizations of a child with RS. The primary research question addresses the ability of familiar and unfamiliar listeners to interpret unconventional vocalizations as “yes” or “no” responses. This paper will also address the acoustic analysis and perceptual judgments of these vocalizations. Pre-recorded isolated vocalizations of “yes” and “no” were presented to 5 listeners (mother, father, 1 unfamiliar, and 2 familiar clinicians) and the listeners were asked to rate the vocalizations as either “yes” or “no.” The ratings were compared to the original identification made by the child's mother during the face-to-face interaction from which the samples were drawn. Findings of this study suggest, in this case, the child's vocalizations were intentional and could be interpreted by familiar and unfamiliar listeners as either “yes” or “no” without contextual or visual cues. The results suggest that communication partners should be trained to attend to eye-gaze and vocalizations to ensure the child's intended choice is accurately understood.


2012 ◽  
Vol 41 (4) ◽  
pp. 249-257 ◽  
Author(s):  
Tana Kröner ◽  
Kathrin Hansen ◽  
Regina Steil

Theoretischer Hintergrund: Chronische Alpträume stellen eine weit verbreitete Schlafstörung dar, welche einen hohen Leidensdruck hervorruft. Als besonders wirksam in der Behandlung gilt die Imagery Rehearsal Therapy (IRT). Selbsthilfeprogramme stellen hierbei eine effektive, ökonomische Behandlungsoption dar. Fragestellung: Die vorliegende Pilotstudie untersucht die Wirksamkeit einer neuen, IRT-basierten, angeleiteten Selbsthilfe. Methode: 10 Patienten mit chronischen Alpträumen wurden im Rahmen von 4 face-to-face-Sitzungen vor Intervention (T1) sowie 4 Wochen (T2) und 3 Monate (T3) danach hinsichtlich Alptraumhäufigkeit sowie verschiedener psychosozialer Parameter untersucht. Ergebnisse: Die Alptraumhäufigkeit reduzierte sich innerhalb von 4 Wochen signifikant (T1-T2; Effektstärke: 1,0). Dieser Effekt blieb über 3 Monate stabil (T1-T3; Effektstärke: 1,26). Zudem reduzierten sich signifikant Depressions-, Angst- und Anspannungsparameter sowie das Stresserleben. Schlussfolgerung: Das deutschsprachige Selbsthilfemanual könnte eine wirksame Behandlungsmöglichkeit zur Reduktion von Alpträumen darstellen.


Crisis ◽  
1999 ◽  
Vol 20 (3) ◽  
pp. 115-120 ◽  
Author(s):  
Stephen Curran ◽  
Michael Fitzgerald ◽  
Vincent T Greene

There are few long-term follow-up studies of parasuicides incorporating face-to-face interviews. To date no study has evaluated the prevalence of psychiatric morbidity at long-term follow-up of parasuicides using diagnostic rating scales, nor has any study examined parental bonding issues in this population. We attempted a prospective follow-up of 85 parasuicide cases an average of 8½ years later. Psychiatric morbidity, social functioning, and recollections of the parenting style of their parents were assessed using the Clinical Interview Schedule, the Social Maladjustment Scale, and the Parental Bonding Instrument, respectively. Thirty-nine persons in total were interviewed, 19 of whom were well and 20 of whom had psychiatric morbidity. Five had died during the follow-up period, 3 by suicide. Migration, refusals, and untraceability were common. Parasuicide was associated with parental overprotection during childhood. Long-term outcome is poor, especially among those who engaged in repeated parasuicides.


2020 ◽  
Vol 228 (1) ◽  
pp. 14-24 ◽  
Author(s):  
Tanja Burgard ◽  
Michael Bošnjak ◽  
Nadine Wedderhoff

Abstract. A meta-analysis was performed to determine whether response rates to online psychology surveys have decreased over time and the effect of specific design characteristics (contact mode, burden of participation, and incentives) on response rates. The meta-analysis is restricted to samples of adults with depression or general anxiety disorder. Time and study design effects are tested using mixed-effects meta-regressions as implemented in the metafor package in R. The mean response rate of the 20 studies fulfilling our meta-analytic inclusion criteria is approximately 43%. Response rates are lower in more recently conducted surveys and in surveys employing longer questionnaires. Furthermore, we found that personal invitations, for example, via telephone or face-to-face contacts, yielded higher response rates compared to e-mail invitations. As predicted by sensitivity reinforcement theory, no effect of incentives on survey participation in this specific group (scoring high on neuroticism) could be observed.


Methodology ◽  
2006 ◽  
Vol 2 (1) ◽  
pp. 7-15 ◽  
Author(s):  
Joachim Gerich ◽  
Roland Lehner

Although ego-centered network data provide information that is limited in various ways as compared with full network data, an ego-centered design can be used without the need for a priori and researcher-defined network borders. Moreover, ego-centered network data can be obtained with traditional survey methods. However, due to the dynamic structure of the questionnaires involved, a great effort is required on the part of either respondents (with self-administration) or interviewers (with face-to-face interviews). As an alternative, we will show the advantages of using CASI (computer-assisted self-administered interview) methods for the collection of ego-centered network data as applied in a study on the role of social networks in substance use among college students.


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