Reviewing the Van Hiele model and the application of metacognition on geometric thinking

Metacognition, or the ability to think about thinking, is essential in the development of geometric thinking. However, studies on the Van Hiele model and the application of metacognition on geometric thinking are still under-researched. This study aimed to provide a review of the Van Hiele model and the application of metacognition on geometric thinking. A total of 844 articles were retrieved through internet search engines from 1995 to 2020 and manually selected and reviewed systematically. The keywords used related to the Van Hiele model, metacognition, and geometric thinking. The findings that emerged from the review were categorized into two main themes which were the effectiveness of the Van Hiele model towards geometric thinking and the effectiveness of the application of metacognition on geometric thinking. Most articles revealed the positive indication of the geometric thinking development through the Van Hiele model intervention. It also seems that the potential of the application of metacognition in the Van Hiele model can strengthen geometric thinking development. Researchers and educators may find this knowledge useful in conducting empirical studies and developing learning instructions based on the application of metacognition in the development of geometric thinking

A solution for inheritance property of lost person (Mafqud) from Islamic law perspective

The issue of muslims inheritence has been discussing since in recent years. This is due to the increased value of the estate, particularly involving muslims property unclaimed and completed by the beneficiary. Mafqud case is one of the causes of the deceased estate that could not be completed. In this context, the meaning of Mafqud is beneficiary who lost his life in which the status cannot be determined. This is not to be taken lightly as it can cause other problems such as Munasakhat (death plated). This article will discuss the theory and calculations of Taqdir and al-Jam’u, which are combined the calculation if beneficiary still alive and the calculation if beneficiary is dead. On the basis of this calculation, the least part of beneficiaries obtained between two destinies will be determined to solve the problem of distribution of the estate. The authors also discuss the application of the theory of al-Taqdir in some circumstances Mafqud case in detail. The data obtained in order to produce this article is from a literature review of previous studies and the view of Islamic jurisprudence. Therefore the authors suggested that the theory of al-Taqdīr should be used for the settlement of Muslim inheritance in Mafqud cases

Investigation of strain measurement on paper-based strain sensor using carbon electrical conductive paint

Electrical strain gauge has been used widely in many applications, such as experimental strength of materials and structural health monitoring because of their low cost and durability in making measurements. Recently, a few new sensors have been developed using the constantan alloy to enhance the sensor's response and sensitivity. However, researchers have noticed that electrical conductive paints alternate their electrical resistance when subjected to mechanical strain. This conductivity is given by the conductive network created by the conductive particles in the paint mixture. The conductive network is then altered as a result of the mechanical deformation, changing the material’s electrical properties. This research aims to study the effect of the paper-based strain sensor when the carbon electrical conductive paint is used as a sensor coil in the sensor. We studied the changes in the electrical resistance R as the length of the sensor changed according to the applied strain. The conductive paint was applied on 80gsm A4 printing paper. There are three sensor designs that have been studied. For the first method, the gauge factor for design one is 0.67, the second design gives 0.33 for the gauge factor, and the gauge factor for the third design is 0.50. The design that is suitable for the fabrication of the paper-based strain sensor is design 1 because it has the highest sensitivity compared to other designs. However, the sensor's sensitivity must be enhanced by doing more research to produce a better sensor

Fabrication of low-cost hip implant using direct metal laser sintering technique

Total hip replacement (THR) is the most popular surgery been performed in orthopedic surgery due to the inclination of musculoskeletal disorder and the aging population worldwide. However, the implant’s cost-burdened the patient, especially in the ASEAN region. The main objective of this study was to fabricate the low-cost hip implant using direct laser metal sintering (DMLS). The framework starts with the three dimensional of hip anthropometric datasets from computed tomography scanner, followed with the design of hip implant, computational analysis using finite element, and finally fabrication using DMLS technique. The morphological results demonstrated the value of neck-shaft angle was 130.46º, and the femoral head offset of 30.35 mm. The finite element analysis showed strain distribution was 65 MPa for the implant in metaphyseal region and 110 MPa for intact femur under staircase physiological loading which indicated inhibition of stress shielding at medical calcar region, and micromotion was 4.8 μm which prevent the formation of fibrous tissue and promoting osseointegration between implant-bone interfaces. This study proposed the fabrication using the DMLS technique, which produced accurate implant with low-cost, which suits the ASEAN hip morphology that prolongs implant lifetime

Influence of viscous dissipation on the boundary layer flow of Cu-Al2O3 hybrid nanofluid

This study presents the mathematical modelling of two dimensional boundary layer flow of hybrid nanofluid where the impact of viscous dissipation has been accentuated in the energy equation. The copper and aluminium oxide nanoparticles are considered in this study. The surface of the model is stretched and shrunk at certain values of stretching/shrinking parameter. The partial differential equations of the hybrid nanofluid are reduced to the ordinary differential equations with the utilization of the suitable similarity transformations. Then Matlab software is utilized to produce the numerical and graphical results by implementing the bvp4c function. Subsequently, dual solutions are obtained with the correct guess values. The insertion of viscous dissipation in this model tremendously lessens the rate of heat transfer. Besides, the effects of the suction and nanoparticles concentration also have been highlighted. An increment in the suction parameter and concentration of copper enhance the magnitude of the reduced skin friction coefficient while the augmentation of the aluminium oxide nanoparticles shows a different trend

Magnetohydrodynamics flow of Ag-TiO2 hybrid nanofluid over a permeable wedge with thermal radiation and viscous dissipation

Hybrid nanofluids, which are made by suspending non-identical nanoparticles, have been a prominent research area because of their high efficiency in heat transfer. The analysis of the magnetohydrodynamics flow of Ag-TiO2 hybrid nanofluid over a permeable wedge with heat radiation and viscous dissipation is mathematically examined in this paper. Ordinary differential equations are deduced by applying the corresponding similarity transformations to the mathematical modelling of the governing partial differential equations. The dimensionless governing equations are solved using the built-in bvp4c function in the MATLAB package to compute the dual solutions and the stability analysis. A respectable degree of agreement has been obtained after comparing the current results with the earlier study. Prandtl number, magnetic parameter, radiation parameter, Eckert number, and other governing factors have all been studied, along with their physical impacts on fluid flow. The graphical results have been demonstrated and described in relation to the profiles of temperature and velocity distribution, skin friction as well as the Nusselt number. It has been established that the higher volume percentage of titania nanoparticles has the potential to improve thermal conductivity, and the first solution has been found to be stable in this flow

The effectiveness of infusion of metacognition in van Hiele model on secondary school students’ geometry thinking level

Metacognition is the ability to think about thinking. One of the learning models in geometry is the van Hiele model, which consists of learning phases and geometry thinking level. However, geometry learning strategy in Indonesia does not stress metacognition and geometry thinking level. Hence, this study aims to examine the effectiveness of geometry learning strategy based on the infusion of metacognition in van Hiele model compared to van Hiele learning phases in helping secondary school students to improve their geometry thinking level. The quasi-experimental study was conducted six-week with 90 students. The students selected purposively divided into two groups, with 30 students in both treatment groups, respectively. The instrument employed van Hiele Geometry Test (vHGT) before and after the treatment to measure the student’s geometry thinking level. Data were in ordinal form analyzed descriptively and inferentially using Mann-Whitney U. The result revealed the significant difference between the final geometry thinking level in both groups. Thus, it can be concluded that the geometry learning strategy based on the infusion of metacognition in van Hiele model is more effective in improving the student’s geometry thinking level than the geometry learning strategy based on van Hiele model

Signifikasi wau dalam telemovie "Wau Kasih"

Wau merupakan sejenis permainan tradisi masyarakat Melayu, terutamanya wau bulan yang menjadi ikon kepada masyarakat Kelantan. Pada masa kini, permainan wau semakin lenyap dek arus globalisasi yang serba canggih, Sedikit sebanyak pemodenan mempengaruhi pola pemikiran masyarakat yang memandang rendah pada hal yang tradisional. Bagi melestarikan permainan tradisi, bidang perfileman dilihat relevan dalam memaparkannya secara visual dan verbal. Kreativiti sutradara atau pengarah dituntut dalam menterjemahkan simbol-simbol budaya sinematik yang memberi makna kepada penonton. Telemovie, Wau Kasih (2016) terbitan Heritages Movie Sdn. Bhd. dengan kerjasama Astro Citra merupakan karya arahan Wan Mohd Rafiq dan pengarah bersama Sabri Yunus, mengisahkan seorang lelaki yang menyara keluarganya dengan mengambil upah sebagai pembuat wau bulan. Makalah adalah hasil penelitian terhadap tanda-tanda dari aspek visual dan verbal dalam telemovie Wau Kasih (2016). Metodologi kajian ini dilaksanakan secara kualitatif. Penulis melakukan pengamatan rapi terhadap video sebagai rujukan utama. Sebagai rujukan tambahan, penulis menjalankan kajian perpustakaan dan rujukan di laman sesawang terpilih untuk menyokong hujahan. Penulis menggunakan kerangka teori semiotik Charles Sanders Pierce yang memberi perhatian terhadap ikon, indeks dan simbol serta semiotik Roland Barthes digunakan sebagai kerangka teori kajian. Melalui pemerhatian yang dijalankan, penulis mendapati ikon wau bulan mempunyai persamaan dengan watak Pak Akob yang berasal dari Kelantan yang kemudiannya berpindah ke Selangor. Wau bulan tersebut juga turut memaparkan indeks utama cerita ini dengan menjelaskan sebab-akibatnya Pak Akob tinggal di negeri orang. Penulis turut mendapati bahawa wau menjadi simbol kepada rona kehidupan seorang individu di muka bumi ini dan terdapat beberapa falsafah kehidupan yang dipaparkan melalui verbal atau pengucapan dialog pelakon. Oleh hal yang demikian, artikel ini diharapkan mampu merapatkan jurang ilmu kajian budaya tradisi dalam industri filem tempatan

Morphological study of the newly designed cementless femoral stem

A morphology study was essential to the development of the cementless femoral stem because accurate dimensions for both the periosteal and endosteal canal ensure primary fixation stability for the stem, bone interface, and prevent stress shielding at the calcar region. This paper focused on a three-dimensional femoral model for Asian patients that applied preoperative planning and femoral stem design. We measured various femoral parameters such as the femoral head offset, collodiaphyseal angle, bowing angle, anteversion, and medullary canal diameters from the osteotomy level to 150 mm below the osteotomy level to determine the position of the isthmus. Other indices and ratios for the endosteal canal, metaphyseal, and flares were computed and examined. The results showed that Asian femurs are smaller than Western femurs, except in the metaphyseal region. The canal flare index (CFI) was poorly correlated () to the metaphyseal canal flare index (MCFI), but correlated well () with the corticomedullary index (CMI). The diversity of the femoral size, particularly in the metaphyseal region, allows for proper femoral stem design for Asian patients, improves osseointegration, and prolongs the life of the implan