Didactic Potentials of a Task Sequence: Teaching the Notion of a Space Curve

2021 ◽  
pp. 177-186
Author(s):  
Matija Bašić ◽  
Željka Milin Šipuš
Keyword(s):  
2021 ◽  
Vol 11 (4) ◽  
pp. 451
Author(s):  
Miriam Gade ◽  
Kathrin Schlemmer

Cognitive flexibility enables the rapid change in goals humans want to attain in everyday life as well as in professional contexts, e.g., as musicians. In the laboratory, cognitive flexibility is usually assessed using the task-switching paradigm. In this paradigm participants are given at least two classification tasks and are asked to switch between them based on valid cues or memorized task sequences. The mechanisms enabling cognitive flexibility are investigated through two empirical markers, namely switch costs and n-2 repetition costs. In this study, we assessed both effects in a pre-instructed task-sequence paradigm. Our aim was to assess the transfer of musical training to non-musical stimuli and tasks. To this end, we collected the data of 49 participants that differed in musical training assessed using the Goldsmiths Musical Sophistication Index. We found switch costs that were not significantly influenced by the degree of musical training. N-2 repetition costs were small for all levels of musical training and not significant. Musical training did not influence performance to a remarkable degree and did not affect markers of mechanisms underlying cognitive flexibility, adding to the discrepancies of findings on the impact of musical training in non-music-specific tasks.


2021 ◽  
Vol 568 ◽  
pp. 1-12
Author(s):  
Chen Wan ◽  
Wenzhong Li ◽  
Wangxiang Ding ◽  
Zhijie Zhang ◽  
Qingning Lu ◽  
...  

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 14504-14515
Author(s):  
Sangmin Lee ◽  
Dae-Eun Lim ◽  
Younkook Kang ◽  
Hae Joong Kim

Author(s):  
Z. Chen ◽  
B. Lei ◽  
Q. Zhao

Based on space curve meshing theory, in this paper, we present a novel geometric design of a circular arc helical gear mechanism for parallel transmission with convex-concave circular arc profiles. The parameter equations describing the contact curves for both the driving gear and the driven gear were deduced from the space curve meshing equations, and parameter equations for calculating the convex-concave circular arc profiles were established both for internal meshing and external meshing. Furthermore, a formula for the contact ratio was deduced, and the impact factors influencing the contact ratio are discussed. Using the deduced equations, several numerical examples were considered to validate the contact ratio equation. The circular arc helical gear mechanism investigated in this study showed a high gear transmission performance when considering practical applications, such as a pure rolling process, a high contact ratio, and a large comprehensive strength.


2020 ◽  
Vol 32 (4) ◽  
pp. 1055-1072 ◽  
Author(s):  
Tamara van Gog ◽  
Vincent Hoogerheide ◽  
Milou van Harsel

Abstract Problem-solving tasks form the backbone of STEM (science, technology, engineering, and mathematics) curricula. Yet, how to improve self-monitoring and self-regulation when learning to solve problems has received relatively little attention in the self-regulated learning literature (as compared with, for instance, learning lists of items or learning from expository texts). Here, we review research on fostering self-regulated learning of problem-solving tasks, in which mental effort plays an important role. First, we review research showing that having students engage in effortful, generative learning activities while learning to solve problems can provide them with cues that help them improve self-monitoring and self-regulation at an item level (i.e., determining whether or not a certain type of problem needs further study/practice). Second, we turn to self-monitoring and self-regulation at the task sequence level (i.e., determining what an appropriate next problem-solving task would be given the current level of understanding/performance). We review research showing that teaching students to regulate their learning process by taking into account not only their performance but also their invested mental effort on a prior task when selecting a new task improves self-regulated learning outcomes (i.e., performance on a knowledge test in the domain of the study). Important directions for future research on the role of mental effort in (improving) self-monitoring and self-regulation at the item and task selection levels are discussed after the respective sections.


2014 ◽  
Vol 1036 ◽  
pp. 864-868 ◽  
Author(s):  
Marcin Zemczak ◽  
Damian Krenczyk

The paper presents the task scheduling issue, which main aim is to establish a proper sequence of tasks, that would maximize the utilization of companys production capacity. According to the literature sources, the presented sequencing problem, denoted as CSP (Car Sequencing Problem) belongs to the NP-hard class, as has been proven by simple reduction from Hamiltonians Path problem. Optimal method of solution has not yet been found, only approximate solutions have been offered, especially from the range of evolutionary algorithms. Regardless of specific production system, while considering reception of new tasks into the system, current review of the state of the system is required in order to decide whether and when a new order can be accepted for execution. In this paper, the problem of task scheduling is limited to the specific existing mixed-model production system. The main goal is to determine the effective method of creation of task sequence. Through the use of computational algorithms, and automatic analysis of the resulting sequence, rates of production are able to be checked in a real time, and so improvements can be proposed and implemented.


Author(s):  
Joseph Pegna ◽  
Franz-Erich Wolter

Abstract In the design and manufacturing of shell structures it is frequently necessary to construct trimming curves on surfaces. The novel method introduced in this paper was formulated to be coordinate independent and computationally efficient for a very general class of surfaces. Generality of the formulation is attained by solving a tensorial differential equation that is formulated in terms of local differential properties of the surface. In the method proposed here, a space curve is mapped onto the surface by tracing a surface curve whose points are connected to the space curve via surface normals. This surface curve is called to be an orthogonal projection of the space curve onto the surface. Tracing of the orthogonal projection is achieved by solving the aforementionned tensorial differential equation. For an implicitely represented surface, the differential equation is solved in three-space. For a parametric surface the tensorial differential equation is solved in the parametric space associated with the surface representation. This method has been tested on a broad class of examples including polynomials, splines, transcendental parametric and implicit surface representations. Orthogonal projection of a curve onto a surface was also developed in the context of surface blending. The orthogonal projection of a curve onto two surfaces to be blended provides not only a trimming curve design tool, but it was also used to construct smooth natural maps between trimming curves on different surfaces. This provides a coordinate and representation independent tool for constructing blend surfaces.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Luana Ferreira-Lopes ◽  
Iciar Elexpuru-Albizuri ◽  
María José Bezanilla

Purpose Allowing for interaction with foreign cultures without the need to travel, intercultural virtual collaboration represents a potential tool to develop business students’ intercultural competence. This study aims to explore students’ perceptions towards the implementation of a research-based task sequence in a project in which undergraduate Business students from Spain collaborated virtually with undergraduate business students from The Netherlands during a semester. More specifically, this paper investigates what intercultural competence indicators were mostly developed by the sequence implemented; how much each task from the sequence in question developed different intercultural competence indicators; and how much students enjoyed participating in each task. Design/methodology/approach Data was collected through after-task reflection questionnaires. A quantitative analysis of Likert-type questions was carried out and open-ended responses were used to illustrate findings. Findings Results reveal that the task sequence developed different dimensions of students’ intercultural competence and, particularly, fostered a positive attitude towards intercultural relationships, increased students’ cultural knowledge and awareness and equipped students with skills to work in diverse teams. It also showed that as complexity grew along the sequence, the average students’ perception of their intercultural competence development tended to decrease. The majority of students’ very much liked participating in the different tasks. Originality/value Designing telecollaborative projects can be very challenging and understanding the learning potential of different pedagogical strategies for virtual collaborative environments can help teachers to take better-informed decisions.


2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Branislav Savic ◽  
Dario Cazzoli ◽  
René Müri ◽  
Beat Meier

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