AMPLITUDO : Journal of Science and Technology Innovation

Learning Media to Improve Numeracy Skills and Motivation of Students

Thufail Mujaddid Al-Qoyyim — 2024-08-31

Numeracy ability is a basic ability that students must have to face the progress of the times. This ability guides students to analyze and solve mathematical problems and problems in everyday life. Even though it is very important, the numeracy skills of students in Indonesia are still very low. Therefore, efforts need to be made to improve and adjust strategies in the learning process so that students' numeracy abilities can increase. One effort is to use learning media. This research aims to find out what learning media are used by teachers to improve the numeracy skills of elementary school students, especially at the Tahfidzul Quran An-Nahl Mataram Integrated Islamic Elementary School. This research method is through teacher interviews and learning observations for 5 months in the odd semester of the 2023/2024 academic year. There are several media used by teachers in the process of improving numeracy skills at the Tahfidzul Quran An-Nahl Mataram Integrated Islamic Elementary School, including the addition and subtraction board, an introduction to measuring instruments board, rupiah specimen currency media, and a long unit ladder prop. All media used by teachers can increase student activity and involvement, learning outcomes, and student learning motivation.

Factors Related to The Inaccessibility of HIV Tests for Women of Reproductive Age in Uzbekistan

Muhammad Uzair Khan — 2024-08-31

HIV testing is important for women of reproductive age. It will be risky during the period of pregnancy, delivery, and breastfeeding and lead to MTCT (mother-to-child transmission) of HIV/AIDS. This study aimed to examine the factors associated with HIV testing. This study used MICS data that gathered the data from November 2021 to January 2022. The total respondents in this study were 1,893 women. The result revealed that 42.58% of women in this study found inaccessibility to HIV testing. The multivariate analysis found the impactful factors are living in rural areas, experienced more than one marriage, and husband/partner as the main decision maker in selecting health facilities, with AOR 1.29; 1.74; and 1.56, respectively. In sum, almost half of women of reproductive age in Uzbekistan cannot access HIV testing with experienced more than once marriage had the highest risk. A qualitative approach can be included in the future study.

Exploring Biomass Conversion Technologies: From Raw Materials to Valuable Products

Syed O Ali — 2024-08-31

The global demand for eco-friendly energy has propelled biomass into the spotlight. This report delves into biomass conversion technologies, including biochemical and thermochemical processes, with a focus on hydrothermal conversion. It highlights challenges related to cost-effectiveness and commercial viability. Thermochemical conversion processes, such as pyrolysis and combustion, unlock energy from organic matter. Hydrothermal processing's three approaches and their efficiency are discussed, particularly in biofuels, chemicals, and biochar production. The review analyzes hydrothermal gasification, emphasizing its efficiency and minimal processing time. Carbon and hydrogen gasification efficiencies are crucial in determining gas yields in supercritical conditions. Yield distribution and the influence of feedstock nature and composition on product yield are examined. In conclusion, this report offers insights into biomass conversion technologies and their sustainability for energy and chemical needs.

General Characteristics of Eastern Indonesian Household Dietary Diversity Score

Maretalinia Maretalinia — 2024-08-31

Household dietary diversity score (HDDS) is a crucial indicator of food security and nutritional outcomes. The data collection was done from 2017 to 2018 in Eastern Indonesia. This study aimed to capture the characteristics of HDDS based on district, province, religion, and head of household age. This study used secondary data from the Coastal Community Development Project (CCDP), IFAD Impact Assessment Survey 2018. The total sample of this study was 2,884 households. The HDDS was calculated based on the score of 12 food groups and presented in a bar graph using STATA version 17. The result revealed that the lowest HDDS was found in the Kupang district, East Nusa Tenggara Province, Confucianism or Konghucu Religion, and 15 to 25 years of head of household age. Household dietary diversity score is a critical measure of food security and nutritional status, reflecting a household's access to a variety of foods. Understanding and addressing these determinants are essential for improving household dietary diversity and ultimately enhancing nutrition outcomes.

Development of Student Worksheets Based on Problem Based Learning (PBL) Assisted by PhET Simulations to Improve Mastery of High School Physics Concepts

Lalu Muhammad Septian Maulana — 2024-08-31

This development research aims to produce a product in the form of a Student Workshees (known LKPD) based on a problem-based learning model that is feasible, practical and effective for improving students' mastery of concepts. This research is included in Research and Development (R&D) with a 4D model, which consists of defining, designing, developing, and disseminating. The product developed is Newton's Law LKPD supported by other independent curriculum tools: Learning Outcomes, Learning Goal Flow, Teaching Modules, and concept mastery test instruments. Data collection techniques use validation sheets, learning implementation observation sheets, student response questionnaires, and test instruments. The validity of the product was assessed by three expert validators, who were physics lecturers, and three practitioner validators, who were physics subject teachers. Their evaluations were performed using a Likert scale. Practicality is obtained from the teacher's observation sheet and student response questionnaires regarding learning. Effectiveness was obtained from the results of limited product trials in the form of an increase in pretest and posttest scores, which were analyzed using the n-gain test. The results of the validity of the product developed have a percentage, namely LKPD 92.12%; Learning Achievement 92.08%; Flow of Learning Objectives 92.60%; Teaching modules 89.78% and test instruments 91.15% with very valid and reliable categories above 75%, so the product can be said to be suitable for use. The results of the product's practicality were in the form of an implementation sheet by the teacher. Student responses of 92.08% and 82.10% were written in the convenient category. The results of the n-gain test for students' concept mastery were 0.74 in the medium category and included in the very effective criteria. Thus, the LKPD, Learning Outcomes, Learning Goal Flow, Teaching Modules and test instruments produced are feasible, practical and effective in improving students' mastery of concepts.

Synthesis of TiO2 Thin Film with Cobalt Doping Using Sol-Gel Spin-Coating Technique as a Solar Cell Material

Denda Anung Satipa — 2024-08-31

Research has been done on thin films by mixing TiO₂ with cobalt doping and adding HCI as a solar cell material. The aim of this research is to produce a thin layer that is good for use in solar cells. This research has several stages, namely: 1) weighing cobalt and titanium; 2) glass substrate preparation; 3) making a sol-gel solution; 4) thin layer deposition; and 5) heating the sample. From these several stages, the result was that a pure TiO₂ solution without doping obtained a thick white solution, whereas the more doping used, the fainter the color of the solution obtained. The thin-layer synthesis process uses a spin-coating method assisted by a modified centrifuge to evenly distribute the sol-gel solution on the surface of the glass substrate

Influence of Carbon Nanotubes in Improving the Superconducting and Structural Properties of Bulk Bi-2212 Synthesis by Thermal Treatment Method

Safia Izzati Abd Sukor — 2024-08-31

Bi-2212 superconductor has garnered significant interest in recent years due to its potential applications in the development of superconducting wires and tapes. The effect of introducing carbon nanotubes (CNT) into the Bi-2212 system was investigated in terms of superconducting and structural properties. The results of this study indicated that the addition of CNTs had a notable effect on the phase formation of Bi-2212, with a substantial increase from 86.8% to 97.4% for the sample with a weight percentage of 0.8 wt.%. This can be attributed to the improved particle orientation brought about by the introduction of CNTs. The microstructure analysis displayed randomly distributed grains of irregular shapes, with a reduced average grain size of 1.018 μm upon the addition of 0.4 wt.% CNTs. Additionally, the inclusion of CNTs led to an increase in the T_c value, with the maximum T_c-onsetrecorded at 79 K for the sample containing 0.6 wt.% CNTs. In summary CNT has enhanced the structural and the superconducting properties of the Bi-2212 synthesised with thermal treatment method.

The Influence of Cognitive Style on Students' Critical Thinking Skills in Physics Material

Nisa Hidayatullah — 2024-08-31

This research aims to determine the influence of cognitive style on students' critical thinking abilities. This research uses a quasi-experimental method with a factorial design research design. The research subjects consisted of class XI MAN 1 Central Lombok students who were divided into experimental classes and control classes. The experimental class uses the PBL model, while the control class uses a conventional learning model. Research instruments include critical thinking ability tests and the Group Embedded Figures Test (GEFT) cognitive style test. Before the critical thinking ability test instrument is given, a test of the instrument is first carried out, namely a validity and reliability test. level of difficulty, and distinguishing power. The research results show that the significant level value is 0.001 which is smaller than α which is equal to 0.05 (0.000<0.05). These findings indicate that there is an influence of cognitive style on students' critical thinking abilities.

The Role of Bio-based Plasticizers in Mitigating Polymer Membranes Fragility and Brittleness

Ibrahim Maina Idriss — 2024-08-31

_{The review article focuses on the potential of bio-based plasticizers to enhance the mechanical properties of polymer membranes, addressing the critical issues of fragility and brittleness. It highlights the environmental and health risks associated with traditional plasticizers like phthalates and also advocates for the adoption of sustainable and non-toxic bio-based alternatives. In doing so, it emphasizes the significant advancements in bio-based plasticizer research, aiming to stimulate further scientific inquiry into their application in membrane synthesis. By advocating for the adoption of green polymers, the article underscores the critical necessity for the development of environmentally benign and mechanically robust membrane technologies. These advancements hold considerable promise for a wide array of applications, notably within biomedical domains and separation processes, heralding a new era of sustainability and functionality in membrane technology.}