Semi-analytical model development for preliminary study of 3D woven Composite/Metallic flange bolted assemblies

2021 ◽  
Vol 255 ◽  
pp. 112906
Author(s):  
Wafaa El Masnaoui ◽  
Alain DaidiÉ ◽  
Frédéric Lachaud ◽  
Christian Paleczny
2020 ◽  
Vol 3 (1) ◽  
pp. 46-53
Author(s):  
Imas Kania Rahman

The numerous cases of academic procrastination of students in various universities in Indonesia are worrying. In terms of intervention, there is a proven effective approach to improve students’ skill to cope with academic procrastination. It’s called Guidance and Counseling Gestalt Prophetic (G-Pro). Unfortunately, due to a lack of access, G-Pro needs to be developed. This article will present a new approach called E-Counseling Gestalt Prophetic (E-G-Pro). The author used the Borg and Gall model research and development (R & D) model with three research steps: a preliminary study, model development, and model validity.  Focus group discussion (FGD) has been done to assess the properness of the model. Four parties, each from information and technology expert, Qur'anic Interpretation expert, Islamic education and religiosity expert, guidance and counselor expert, and counselee, were invited to the FGD. Based on internal judgement by experts and users, the E-G-Pro is highly feasible to be applied to help students cope with academic procrastination in Indonesian Islamic Higher Education.


2010 ◽  
Vol 2 (2) ◽  
Author(s):  
Alexon & Nana Syaodih Sukmadinata

Abstract: Developing a Culture-Based Integrated Learning Model to ImproveStudents’ Appreciation of Local Culture. This study aims to develop a social studylearning model for elementary school students that can help them master subjectmatters as an effort to improve their appreciation of local culture, using an R & Dapproach consisting of three steps: preliminary study, model development andmodel validation. The subjects were teachers and students of elementary schools inBengkulu Province, Sumatra. The results show that the Culture-Based IntegratedLearning Model (CBILM) is an appropriate learning model to help students mastersubject matters as an effort to improve their appreciation of local culture. CBILM ismore capable of significantly improving students’ appreciation of local culture andtheir mastery of subject matters than the currently existing learning model.Keywords: learning model, social studies for elementary schools, cultureappreciation


2020 ◽  
Vol 7 (1) ◽  
pp. 133-141
Author(s):  
Atikah Syamsi ◽  
Zulela M.S. ◽  
Yufiarti Yufiarti

AbstractThe study is to provide an alternative science learning model of an elementary school that can invite students to improve science literacy. As observations and questionnaires of researchers in a preliminary study at two elementary schools in the city of Cirebon, West Java, it was found that based on the average results of the initial analysis of scientific literacy tests of students from the two schools, an average of 85.7% showed negative results with the ability to answer the practice of science questions in the form of literacy, which means that students have not been able to answer literacy questions test. The research method uses model development the ASSURE development model starting with Student analysis; setting goals; choose a method, media / material, use media & material; activating student involvement as well as evaluations & revisions developed by Sharon Smaldino. As for the preliminary study conducted by analyzing 5th-grade students of Madrasah Ibtidaiyah (MI) PGM and Madrasah Ibtidaiyah (MI)  An-Nur Cirebon as samples and also observing teachers from the two schools, so this research produces a SIBELPOLEN model for science learning, which consists of teaching syntax, teacher roles, support system, accompaniment impact, instructional impact and designing lesson plans that can improve Science literacy competence of elementary school students.AbstrakPenelitian ini bertujuan untuk memberikan alternatif model pembelajaran Ilmu Pengetahuan Alam (IPA) di sekolah dasar dalam  meningkatkan literasi sains pada siswa. Hasil observasi dan angket peneliti dalam studi pendahuluan di dua Sekolah Dasar di Kota Cirebon Jawa Barat diketahui bahwa berdasarkan rata-rata hasil analisis awal tes literasi sains siswa dari dua sekolah tersebut rata-rata 85,7% menunjukkan hasil negatif dengan kemampuan menjawab soal latihan soal IPA berupa literasi yang artinya siswa belum mampu menjawab soal tes literasi. Metode penelitian yang diterapkan pengembangan model ASSURE yang diawali dengan Student analysis; menetapkan tujuan; pilih metode, media / material, gunakan media & material; mengaktifkan keterlibatan siswa serta evaluasi & revisi yang dikembangkan oleh Sharon Smaldino. Adapun studi pendahuluan dilakukan dengan menganalisis siswa kelas V Madrasah Ibtidaiyah (MI) PGM dan Madrasah Ibtidaiyah (MI) An-Nur Cirebon sebagai sampel dan juga melakukan observasi terhadap guru dari kedua sekolah tersebut, maka penelitian ini menghasilkan model SIBELPOLEN untuk pembelajaran IPA. yang terdiri dari: sintaks pengajaran, peran guru, sistem pendukung, dampak pendampingan, dampak instruksional dan merancang rencana pembelajaran yang dapat meningkatkan kompetensi literasi sains siswa sekolah dasarHow to Cite: Syamsi, A, M. S. Zulela., Yufiart (2020). ).  Improving Students’ Scientific Literacy through the Cycle-based Learning Model. TARBIYA: Journal of Education in Muslim Society, 7 (1), 133-142. doi:10.15408/tjems.v7i1.16941


2019 ◽  
Vol 38 (1) ◽  
pp. 141-155
Author(s):  
Gusnawaty Gusnawaty ◽  
Andi Nurwati

The study was aimed for developing a learning model of Bahasa Indonesia based on local intercultural politeness to improve the foreigners’ communicative competencies. This is Research and Development, started with a preliminary study of intercultural learning concepts and Buginese politeness strategies; the distribution of the needs analysis instruments to the 25 foreigners learning Bahasa Indonesia in Makassar, South Sulawesi, Indonesia; model development, focus group discussions; the model finalization and  product experiment. The interviews and questionnaires data were analyzed by descriptive quantitative and qualitative. The result, a local politeness intercultural learning model consisting of four phases: noticing, comparing, reflecting, and interacting.  1) The foreign learners noticed the use of local politeness markers in Bahasa Indonesia; 2) They compared the similarities and differences between the use of the markers of local politeness and those they found in their native languages; 3) They reflected themselves; 4) They practiced Bahasa Indonesia through direct interactions. The conclusion showed that the t-score = 3.26 > t-table = 2.45 signifying that the model was effective in overcoming the foreign learners’ problems in oral interactions and improving their Bahasa Indonesia communicative competencies.


Author(s):  
Qingwen Deng ◽  
Yuyi Lin

Abstract This paper presents a one-dimensional analytical model of the ram extrusion process of a powdered material and a procedure for optimizing the shape of the extrusion die. Powdered coal mixed with water and asphalt was used as the extrudate material in the model development. The analytical model relates the pressure at the entrance of the die to the exit pressure of the die. Certain key parameters of the model were obtained from experiments. The comparison of the inlet pressure derived from the analytical model and the value obtained from the experimental procedure shown a good agreement. Optimization algorithms were applied to generate the ideal die shape. The objective is to minimize the power consumed in the extrusion process, while maintaining maximum strength for the extrudates. It is concluded from the study that the model and the optimization procedure developed for the model can be used in extrusion studies of other powdered materials.


Author(s):  
Jaeho Kwak ◽  
Bin Yao ◽  
Anil Bajaj

This paper presents a detailed analytical model development which can describe the dynamic behavior of the electromechanical brake-by-wire (BBW) system over the entire operating range. The complete model has 10 degree-of-freedom (DOF) and includes essential nonlinearities such as gear backlashes, Coulomb frictions, and disk gap clearance. Such a full model is reduced to 6 degree-of-freedom model in SIMULINK for simulation study of the effectiveness and the achievable performance of different hardware and controller designs, an invaluable tool in the early design stage of a product. Simulation results show that the model is able to reproduce various nonlinear characteristics including typical structural hysteresis as shown in real brake assembly. The linearized version of the full nonlinear model is then obtained for its modal properties to understand the modes that are critical to the low frequency dynamics of the overall system. The results of the modal analyses are subsequently utilized to obtain two simplified models, one for non-contact mode and the other for the contact mode of operation. The concepts of two simplified models well capture the dynamic characteristics of the system over the frequencies of interest and are being used in the controller (e.g., clamping force control) and estimator (e.g., gap clearance estimation) designs that are under investigation.


2014 ◽  
Vol 7 (4) ◽  
pp. 638-660 ◽  
Author(s):  
Asbjørn Rolstadås ◽  
Iris Tommelein ◽  
Per Morten Schiefloe ◽  
Glenn Ballard

Purpose – The purpose of this paper is to show that project success is dependent on the project management approach selected, relative to the challenges posed by the project, and to develop an analytical model for analyzing the performance of the project organization. Design/methodology/approach – The research is based on literature review, model development, interviews, and case studies. Findings – The findings define two different approaches in project management: The prescriptive approach focusses on the formal qualities of the project organization, including governing documentation and procedures. The adaptive approach focusses on the process of developing and improving a project organization, project culture and team commitment. The two approaches have been identified through studies of three different case projects. An analytical model, referred to as the Pentagon model, has been applied for analyzing the performance of the project organization and explaining the project management approach. The model focusses on five different organizational aspects: structure, technologies, culture, social relations and networks, and interaction. Research limitations/implications – The research is limited to megaprojects and to project management success. Practical implications – It is suggested that project teams consider and select their project management approach at project initiation, and accordingly decide on relevant success factors to focus on. The adapted Pentagon model can be applied to develop the project management organization and assess its performance in the course of project delivery. Originality/value – The contribution of the research is the application of the analytical model, and the identification as well as illustration of the prescriptive, vs adaptive management approach.


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