State University of Malang

About: State University of Malang is a education organization based out in Malang, Indonesia. It is known for research contribution in the topics: Population & Computer science. The organization has 6239 authors who have published 6558 publications receiving 20589 citations.

A Review of Silver Nanoparticles: Research Trends, Global Consumption, Synthesis, Properties, and Future Challenges

Abstract: Silver nanoparticles (AgNPs) are intensively investigated for their superior physical, chemical, and biological properties. A proper knowledge of these properties is essential to maximizing the potential applications of AgNPs in several areas while minimizing their risks to humans and the environment. This paper aims to critically review AgNPs from the perspectives of research trends, global consumption, synthesis, properties, and future challenges. Generally, AgNPs can be synthesized using three methods, namely physical, chemical, and biological, and the related works as well as their numerous advantages and disadvantages are presented in this review. In addition, AgNPs can be potentially explored for various applications. Future challenges on (AgNP) synthesis, their release into the environment, and scaling up production, as presented in the review, suggest that several potential topics for future works are available to promote a safer and more efficient use of these nanoparticles. Studies on AgNPs in Malaysia have increased since the Malaysian government officially established a directorate for nanotechnology development. This calls for a proper set of policies on AgNPs starting from their production to utilization as well as their effects on various related industries and the environment.

Indonesia Education Readiness Conducting Distance Learning in Covid-19 Pandemic Situation

Abstract: At the end of 2019 China was shocked by a very deadly virus outbreak, Covid-19. Then in 2020, this virus outbreak became a global pandemic that resulted in many life settings being forced to change suddenly, one of which was teaching and learning activities in schools. Indonesia also immediately adjusts the conditions to minimize the spread of this virus. Schools and universities agreed to change learning activities towards distance learning systems. However, the poor implementation has actually made the situation worse, where students feel a lot of stress due to distance learning management is not done comprehensively. This article aims to analyze the implementation of distance learning systems carried out by Indonesian education in the Covid-19 pandemic situation. Literature studies from various reports and scientific articles as well as in-depth interviews were also conducted with samples of students, teachers and parents, both in rural and urban environments in Indonesia which were most affected by the Covid-19 virus. The results of the analysis conclude that Indonesia has prepared virtual infrastructure well, but the factors of teachers and schools still need to understand more about the essence of distance learning. Students have low self-regulated learning so they are less able to regulate their distance learning activities, teachers tend to stutter about technology, and parents lack understanding of the nature of teaching and learning activities carried out at home.

How does realistic mathematics education (RME) improve students' mathematics cognitive achievement?

Abstract: Some previous research has reported the effectiveness of RME in improving students’ problem solving ability and cognitive achievement. This quasi experimental research, therefore, aimed to investigate the difference in students’ mathematics cognitive achievement after implementing RME and conventional learning. The controlled treatment consisted of mathematics learning with RME equipped with snake and ladder board game and conventional learning. Developed instrument measuring students’ cognitive achievement was validated by some experts prior to the research. The results of the t-test confirmed the difference in students’ cognitive achievement both of the experimental and control group. The students who were taught with RME achieved better than the students who were involved in conventional learning. This research finding has suggested that it is important for teachers to empower students’ intellectual ability through RME and games in order that meaningful and contextual learning can be generated. It is recommended that future research will further explore the effectiveness of RME on students’ cognitive achievement.

Morphology, Structure, and Mechanical Properties of Natural Cellulose Fiber from Mendong Grass (Fimbristylis globulosa)

Abstract: This study was to investigate the morphology, structure, and chemical properties of the Mendong fibers extracted from Mendong grass (Fimbristylis globulosa) in the form of raw and treated fiber by alkali-included chemical content and functional group and to evaluate the strength and properties of Mendong fibers compared with other natural fibers. These studies explore the chemical properties of the fiber including fiber composition and functional group by FTIR, mechanical properties of fiber, and the structural and morphological analysis of the fiber using SEM and XRD. The results showed that the chemical contents of Mendong fibers were 72.14% cellulose, 20.2% hemicellulose, 3.44% lignin, 4.2% extractive, and moisture of 4.2%–5.2%. Mechanical properties of the fiber were a strong character with tensile strength of 452 MPa, and modulus of 17 GPa. The structural properties of Mendong fiber such as crystallinity, crystalline index, microfibril angle, and crystalline size were 70.17% and 58.6%, 22.9°, and 14....