Improving Students\u27 Motivation In Speaking By Using Role Play In Video Modelled Conversation (Vmc)

: Role play in Video Modelled Conversation are proposed in the teaching of speaking not only because of their appealing forms but also due to their salient features, as multimedia to improve the students\u27 motivation in speaking. This study investigated students\u27 motivation by using Dornyei\u27s framework of language learning motivation. A questionnaire and a semi-structured interview were also employed as a means of collecting the data through a classroom action research. The procedures included planning, implementing, observing and reflecting. The results showed that teaching speaking using Role Play in Video Modelled Conversations could successfully improve students motivation in speaking. They find this technology can enhance their English learning motivation and effectively boost their English speaking ability

Synthesis of Nanocrystalline of Lanthanum Doped NaTaO3 and Photocatalytic Activity for Hydrogen Production

Sodium tantalum oxide doping lanthanum (La-NaTaO3) compounds were successfully synthesized by a sol-gel method and calcined at different temperatures. Tantalum chloride (TaCl5) was used as starting material and lanthanum nitrate (La(NO3)3.6H2O) as lanthanum source. X-ray diffraction (XRD) revealed that the calcination temperature strongly influenced the crystallinity of the prepared samples.The crystallite sizes of the resultant La-NaTaO3were in the range of 27-46 nm. The photocatalytic activities of the samples were examined for hydrogen production from an aqueous methanol solution under UV light irradiation. It was found that the photocatalytic activity of the La-NaTaO3 depended strongly on the calcination temperature. The range of calcination temperatures were 500, 700, and 900°C. The La-NaTaO3 sample calcined at 900°C showed the highest photocatalytic activity compared to the samplescalcined at the other temperatures. The rate of hydrogen production reached a value of 6.16 mmol h-1 g-1 catalyst

The Use of Retelling Story to Improve Students\u27 Ability in Speaking

: This research was concerned to know the effectiveness of retelling story in improving students\u27 ability in speaking to the eighth grade students of SMP PGRI 4 Pontianak. The researcher found students have limitations in speaking English because students are not accustomed to speaking in English. One of the reason is the teachers do not provide enough opportunities for students to practice speaking. Retelling story is conveying events in words, images and sounds, often by improvisation. This technique can help teacher provide opportunities for students to practice. The method of this research was pre-experimental research. The researcher measured the improvement of students\u27 speaking ability by collecting the data through performance test. The result of the mean score of the students\u27 pre-test was 63.28. While the students\u27 mean score of post-test after the treatment was 73.20. In addition, based on the computation of t-test was higher than t-table (3.92>2.063). It showed that the alternative hypothesis was accepted and the null hypothesis was rejected. In other words, retelling story in improving students\u27 ability in speaking is effective

The Use of Cloze Test in Increasing the Students Reading Comprehension

The use of cloze Test in Increasing the Students Reading Comprehension. The research is aimed at aswering the problem of the research that is how good is cloze test In increasing students achievement in reading comprehension of the second year students of SMP Kemala Bhayangkari I Kubu Raya. This research uses the descriptive method to illustrate the main point of the study. The data of this research were collected by using indirect technique. Based on data analysis, the mean score of the students was 76.4 and 74.9. It shows that their performance in reading comprehension is average to good. In other words, the use of cloze test significantly improved the Reading Comprehensions of students of SMP Kemala Bhayangkari I Kubu Raya

Reutilization of Real Waste Calcium Carbonate (CaCO3) from the Palm Oil Industry (POI) for Palm Kernel and Shell Separation Through Clay Bath Systems

The palm oil industry (POI) generates significant amounts of waste, including calcium carbonate (CaCO3) from the clay bath system used for the separation of palm kernels from shells. This CaCO3 waste is often discarded, leading to environmental issues. However, the CaCO3 can potentially be reused in the clay bath separation process to improve efficiency and reduce waste. To obtain PKO, the kernel is separated from the palm shell using a clay bath unit, where natural CaCO3 acts as a decanting agent and adsorbent. This wet separation method, involving a mixture of water and CaCO3 with a density of 1.12 g/mL, generates substantial amounts of saturated CaCO3 waste that is often discarded into the environment. Therefore, this research aimed to regenerate oil-bound CaCO3 waste for reuse as a decanter and adsorbent. Three treatments were tested, with CaCO3 waste-to-water ratios of 1:1, 1:3, and 1:6, under varying pH levels (8, 10, 11, 12) and temperatures (28 °C, 80 °C, 100 °C). The regeneration process was conducted in an open reactor at 450 rpm with a volume of 0.0054 m3, followed by drying and grinding the waste for analysis. The results showed approximately 75.75% oil removal and CaCO3 regeneration rates between 94.50% and 99.26%, with an increase in density from 1.687 g/mL to 2.467 g/mL. The efficiency of reusing regenerated CaCO3 waste is 96.87%. When mixed with 25% natural CaCO3, the efficiency increases to 99.24%. Additionally, a mixture of 50% regenerated CaCO3 waste and 50% natural CaCO3 achieves an average efficiency of 99.46% over five consecutive feed additions. This showed that the reuse of CaCO3 waste regeneration results for the separation of palm shells and kernels has a high potential for application. These findings suggest that regenerated CaCO3 waste can be effectively reused, offering a sustainable solution for palm oil mills

Enhancing sustainability through optimized adsorption using a novel Klason-lignin-based biosorbent derived from sugar-palm fruit shells for efficient removal of Pb(II) and Cd(II)

This study investigates the isolation and application of a Klason-lignin-based biosorbent derived from sugar palm fruit shell (SPFS) waste for the adsorption of Pb(II) and Cd(II) from toxic wastewater. The SPFS waste, rich in lignocellulose, underwent pretreatment to extract lignin-containing functional groups suitable for metal ion adsorption. The biosorbent's morphology before and after adsorption was analyzed. Adsorption effectiveness was evaluated through isotherm and kinetic models, with optimal conditions determined using Box-Behnken Design and Response Surface Methodology. Maximum adsorption capacities of 31.35 mg/g for Pb(II) and 12.5 mg/g for Cd(II) were achieved. Optimal conditions, based on Box-Behnken design, were 116.535 mins, 60 mg/L concentration, and 0.5 g adsorbent mass, resulting in adsorption efficiencies of 94.48 % and 60.98 % for Pb(II) and Cd(II), respectively. This research demonstrates the potential of Klason lignin from sugar palm fruit shell (KLSPFS) as an effective biosorbent for Pb(II) and Cd(II) removal, contributing to sustainable development goals 3, 6, and 12 by promoting efficient recycling technologies for improved health, water quality, and waste reduction