PENINGKATAN KUALITAS PENYUSUNAN RPP MELALUI SUPERVISI AKADEMIK DI SDN GUGUS MAMBEN LAUK KECAMATAN WANASABA KABUPATEN LOMBOK TIMUR TAHUN PELAJARAN 2020/2021

Permasalahan dalam penelitian tindakan sekolah (PTS) ini adalah kualitas RPP tematik guru-guru SD Keamatan Wanasaba masih rendah. Tujuan penelitian ini untuk meningkatkan  kualitas Penyusunan RPP Guru-Guru Kecamatan Wanasaba tahun pelajaran 2020/2021 melalui supervisi akademik. Subyek  dalam penelitian ini adalah  guru-guru yang ada di gugus Mamben Lauk Kecamatan Wanasaba. Penelitian dilaksanakan pada bulan Mei 2020 dengan tujuan RPP  yang dibuat dapat digunakan dalam tahun pelajaran 2020/2021. Kegiatan penelitian meliputi (1) tahap persiapan proposal (2) membuat instrumen (3) pelaksanaan supervisi akademik  secara kelompok (Penataran tingkat lokal) dalam siklus I dan supervisi akademik secara individu (percakapan individu) dalam siklus II (4) menganalisa data (5) pembahasan (6) membuat laporan. Penelitian tindakan sekolah (PTS) termasuk jenis penelitian kuantitatif menggunakan Analisis Diskrptif Komparatif dengan membandingkan hasil kondisi awal dengan hasil siklus I teknik penataran tingkat lokal  dan hasil siklus II dengan  teknik percakapan pribadi. Supervisi akademik secara kelompok (penataran tingkat lokal). Hasil penelitian siklus I RPP yang dibuat oleh guru-guru masih belum maksimal maka perlu diadakan supervisi  lagi pada siklus II yaitu  pelaksanaan tindakan supervisi secara individual (percakapan individu). Hasil rata-rata kualitas RPP pada kondisi awal  58,5 (kategori kurang) Hasil rata-rata kualitas RPP pembelajaran tematik pada siklus I 75,6 (kategori baik). Peningkatan hasil siklus I dibanding kondisi awal 29,3 %. Sedangkan hasil rata-rata kualitas RPP pada siklus II  85,22 (kategori baik). Peningkatan hasil siklus II dibanding hasil siklus I 13%.Permasalahan dalam penelitian tindakan sekolah (PTS) ini adalah kualitas RPP tematik guru-guru SD Keamatan Wanasaba masih rendah. Tujuan penelitian ini untuk meningkatkan  kualitas Penyusunan RPP Guru-Guru Kecamatan Wanasaba tahun pelajaran 2020/2021 melalui supervisi akademik. Subyek  dalam penelitian ini adalah  guru-guru yang ada di gugus Mamben Lauk Kecamatan Wanasaba. Penelitian dilaksanakan pada bulan Mei 2020 dengan tujuan RPP  yang dibuat dapat digunakan dalam tahun pelajaran 2020/2021. Kegiatan penelitian meliputi (1) tahap persiapan proposal (2) membuat instrumen (3) pelaksanaan supervisi akademik  secara kelompok (Penataran tingkat lokal) dalam siklus I dan supervisi akademik secara individu (percakapan individu) dalam siklus II (4) menganalisa data (5) pembahasan (6) membuat laporan. Penelitian tindakan sekolah (PTS) termasuk jenis penelitian kuantitatif menggunakan Analisis Diskrptif Komparatif dengan membandingkan hasil kondisi awal dengan hasil siklus I teknik penataran tingkat lokal  dan hasil siklus II dengan  teknik percakapan pribadi. Supervisi akademik secara kelompok (penataran tingkat lokal). Hasil penelitian siklus I RPP yang dibuat oleh guru-guru masih belum maksimal maka perlu diadakan supervisi  lagi pada siklus II yaitu  pelaksanaan tindakan supervisi secara individual (percakapan individu). Hasil rata-rata kualitas RPP pada kondisi awal  58,5 (kategori kurang) Hasil rata-rata kualitas RPP pembelajaran tematik pada siklus I 75,6 (kategori baik). Peningkatan hasil siklus I dibanding kondisi awal 29,3 %. Sedangkan hasil rata-rata kualitas RPP pada siklus II  85,22 (kategori baik). Peningkatan hasil siklus II dibanding hasil siklus I 13%

Design and fabrication of natural woven fabric reinforced epoxy composite for household telephone stand

In the recent era there has been an increasing interest in composite materials for its applications in the field of aerospace, sports, industries, medical, and in many other fields of engineering including household furniture. This paper deals with the design and fabrication of banana woven fabric reinforcement epoxy composite for household telephone stand. A systematic approach of total design process is presented for better understanding of the best design concept for the product. The fabrication process of composite telephone stand using banana woven fabric is also described in this paper

Linear-nonlinear stiffness responses of carbon fiber-reinforced polymer composite materials and structures: a numerical study

The stiffness response or load-deformation/displacement behavior is the most important mechanical behavior that frequently being utilized for validation of the mathematical-physical models representing the mechanical behavior of solid objects in numerical method, compared to actual experimental data. This numerical study aims to investigate the linear-nonlinear stiffness behavior of carbon fiber-reinforced polymer (CFRP) composites at material and structural levels, and its dependency to the sets of individual/group elastic and damage model parameters. In this regard, a validated constitutive damage model, elastic-damage properties as reference data, and simulation process, that account for elastic, yielding, and damage evolution, are considered in the finite element model development process. The linear-nonlinear stiffness responses of four cases are examined, including a unidirectional CFRP composite laminate (material level) under tensile load, and also three multidirectional composite structures under flexural loads. The result indicated a direct dependency of the stiffness response at the material level to the elastic properties. However, the stiffness behavior of the composite structures depends both on the structural configuration, geometry, lay-ups as well as the mechanical properties of the CFRP composite. The value of maximum reaction force and displacement of the composite structures, as well as the nonlinear response of the structures are highly dependent not only to the mechanical properties, but also to the geometry and the configuration of the structures

Mechanical and thermal properties of sugar palm fiber reinforced thermoplastic polyurethane composites: effect of silane treatment and fiber loading

The aim of the present study was to develop sugar palm fiber (SPF) reinforced thermoplastic polyurethane (TPU) composites and to investigate the effects of fiber surface modification by 2% silane treatment and fiber loading (0, 10, 20, 30, 40 and 50 wt%) on the mechanical and thermal properties of the obtained composites. Surface treatment was employed to improve the fiber-matrix interface, which was expected to boost the mechanical strength of the composites, in terms of tensile, flexural and impact properties. Thermal properties were also investigated by thermal gravimetric analysis (TGA) and dynamic mechanical analysis (DMA) to assess the thermal stability of the developed composites. Furthermore, scanning electron microscopy (SEM) was used to study the tensile fracture samples of composites with a view towards evaluating the effects of fiber surface treatments on the fiber/matrix interfacial bonding. The findings of this study reveal that the silane treatment has determined good bonding and linkage of the cellulose fiber to the TPU matrix, hence contributing to enhanced mechanical and thermal properties of the composites. The composite formulation with 40 wt% sugar palm fiber loading showed optimum values such as 17.22 MPa for tensile, 13.96 MPa for flexural, and 15.47 kJ/m2 for impact strength. Moreover, the formulations with higher fiber content exhibited satisfactory values of storage modulus and thermal degradation, while their good interfacial adhesion was evidenced by SEM images

Mechanical performance of roselle/sugar palm fiber hybrid reinforced polyurethane composites

The effect of sugar palm fiber (SPF) loading was studied relative to the mechanical properties of roselle (RF)/SPF/thermoplastic polyurethane (TPU) hybrid composites. RF/SPF/TPU hybrid composites were fabricated at different weight ratios (100:0, 75:25, 50:50, 25:75, and 0:100) by melt mixing and hot compression. The mechanical (tensile, flexural, and impact test) and morphological properties of tensile fractured samples were examined using a universal testing machine, impact machine, and scanning electron microscope. It was found that the hybridization of RF/SPF increased its impact strength corresponding to the increases in the SPF content of the composites. The tensile and flexural properties of the hybrid composites decreased due to poor interfacial bonding between the fiber and matrix. Scanning electron micrographs of the tensile fractured surface of the RF/SPF hybrid composites revealed fiber pullouts and poor adhesion bonding. In conclusion, the hybridization of SPF with RF/TPU composites enhanced its impact strength while decreasing the tensile and flexural strength

Mechanical properties study of pseudo-stem banana fiber reinforced epoxy composite

The source of banana fiber is the waste banana trunks or stems which are abundant in many places in the world. Therefore, composites of high–strength pseudo-stem banana woven fabric reinforcement polymer can be used in a broad range of applications. The objective of this paper is to study the tensile, flexural, and impact properties of pseudostem banana fiber reinforced epoxy composites

Development and characterization of sugar palm starch and poly(lactic acid) bilayer films

The development and characterization of environmentally friendly bilayer films from sugar palm starch (SPS) and poly(lactic acid) (PLA) were conducted in this study. The SPS-PLA bilayer films and their individual components were characterized for their physical, mechanical, thermal and water barrier properties. Addition of 50% PLA layer onto 50% SPS layer (SPS50-PLA50) increased the tensile strength of neat SPS film from 7.74 to 13.65MPa but reduced their elongation at break from 46.66 to 15.53%. The incorporation of PLA layer significantly reduced the water vapor permeability as well as the water uptake and solubility of bilayer films which was attributed to the hydrophobic characteristic of the PLA layer. Furthermore, scanning electron microscopy (SEM) image of SPS50-PLA50 revealed lack of strong interfacial adhesion between the SPS and PLA. Overall, the incorporation of PLA layer onto SPS films enhances the suitability of SPS based films for food packaging

Effect of fiber loading on tensile properties of cocoa pod husk fibers reinforced thermoplastic polyurethane composites

In this study, cocoa (Theobroma cacao) pod husk (CPH) fiber reinforced themoplastic polyurethane (TPU) was prepared by melt blending method using Haake Polydrive R600 internal mixer. The composites were prepared with different fiber loading: 20%, 30% and 40% (by weight), with the optimum processing parameters: 190°C, 11 min, and 40 rpm for temperature, time and speed, respectively. Five samples were cut from the composite sheet. Mean value was taken for each composite according to ASTM standards. Increase of fibre loading showed increase in tensile strength and modulus and decreasing trend of strain

Optimization of processing parameters and fiber content of cocoa pod husk fiber-reinforced thermoplastic polyurethane composites by Taguchi method

A composite of cocoa (Theobroma cacao) pod husk (CPH) fiber reinforced themoplastic polyurethane (TPU) was prepared by melt-blending method followed by compression moulding. Specimens were cut from the sheets that were prepared by compression moulding. The criteria of optimization was testing the specimens by tensile test and comparing the ultimate tensile strength. The aim of this study is to optimize processing parameters and fiber loading using Taguchi approach. These four parameters were investigated in three levels each. The L9 orthogonal array was used based on the number of parameters and levels that have been selected. Furthermore ANOVA was used to determine the significance of parameters. The processing parameters chosen for this study were temperature, speed and time of processing and fiber content. The results showed that optimum values were 190°C, 40 rpm, 11min and 30% for processing temperature, processing speed, processing time and fiber content; respectively. Using ANOVA; fiber content showed the highest significance value followed by processing time. Processing temperature and speed showed no significance in the optimization of TPU/CPH