Sebelas Maret University

About: Sebelas Maret University is a education organization based out in Surakarta, Indonesia. It is known for research contribution in the topics: Population & Public health. The organization has 10901 authors who have published 10832 publications receiving 33057 citations. The organization is also known as: Universitas Negeri Surakarta & Universitas Sebelas Maret.

PENGEMBANGAN MODUL PEMBELAJARAN IPA BERBASIS HIGH ORDER THINKING SKILL (HOTS) UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS SISWA KELAS VIII SMP/MTs

Abstract: Pembelajaran IPA masih belum banyak mengembangkan kemampuan berpikir tingkat tinggi siswa. Penelitian ini bertujuan untuk mendeskripsikan karakteristik modul pembelajaran IPA berbasis High Order Thinking Skill (HOTS) untuk meningkatkan kemampuan berpikir kritis, memperoleh modul pembelajaran IPA berbasis HOTS yang telah memenuhi kriteria layak, dan mengetahui peningkatan kemampuan berpikir kritis siswa kelas VIII SMP N 2 Sragen setelah melakukan pembelajaran IPA menggunakan modul pembelajaran IPA berbasis HOTS. Penelitian pengembangan modul pembelajaran IPA berbasis HOTS ini menggunakan prosedur pengembangan 4D yang terdiri dari tahap pendefinisian ( define ), perancangan ( design ), pengembangan ( develop ), dan penyebaran ( dessiminate ). Tahap pendefinisian terdiri dari proses analisis kebutuhan, analisis materi, serta perumusan pembelajaran pada modul. Tahap perancangan modul sesuai dengan tahap pendekatan saintifik yang diintegrasikan ke dalam modul. Tahap pengembangan terdiri dari proses validasi kelayakan modul, revisi, dan aplikasi modul pembelajaran IPA berbasis HOTS di kelas VIIIE SMP N 2 Sragen. Tahap penyebaran merupakan proses penyebaran modul ke empat SMP/MTS di Kabupaten Sragen. Analisis data pada tahap pendefinisian dilakukan secara deskriptif kuantitatif berdasarkan presentase jawaban angket. Pada tahap pengembangan, dilakukan analisis cut off score untuk menentukan kelayakan modul, analisis kriteria penilaian berdasarkan angket penilaian, analisis quest terhadap hasil uji coba instrumen tes, serta analisis gain score terhadap hasil pretest dan posttest. Pada tahap penyebaran dilakukan analisis kriteria penilaian berdasarkan hasil angket penilaian. Hasil penelitian disimpulkan bahwa: 1) karakteristik khusus modul pembelajaran IPA berbasis HOTS memiliki lima tahap pembelajaran sesuai dengan pendekatan saintifik yang dituangkan pada rubrik dalam modul; 2) modul pembelajaran IPA berbasis HOTS yang dikembangkan memenuhi kriteria kelayakan pada aspek isi dan penyajian, bahasa, kegrafikan, dan aspek pembelajaran HOTS dengan nilai rata-rata 3,55 atau dalam kategori “sangat baik”; 3) modul pembelajaran IPA berbasis HOTS dengan tema sistem penglihatan manusia dapat meningkatkan kemampuan berpikir kritis siswa dengan nilai gain 0,49 atau dalam kategori “sedang”.

Performance of bidisperse magnetorheological fluids utilizing superparamagnetic maghemite nanoparticles

Abstract: Magnetorheological (MR) fluids consisted of micron-size particles generally often faces the instability problem due to the large density mismatch between the large particulate matter and continuous oil medium. Recently, researches have been conducted on the advantages of bidisperse MR fluids that is a mixture of micron and nano-sized magnetic particles. In this work, laboratory prepared maghemite nanoparticles (γ-Fe2O3) with average size of 9 nm were incorporated to the MR fluids comprising carbonyl iron (CI) to reduce the sedimentation rate of the MR fluids. Three different fluids with the same solid concentration of 80.98% have been prepared to contain 5 and 10% substitution of γ-Fe2O3 nanoparticles to the CI particles and the monodisperse CI particles for comparison purpose. The sedimentation rate was measured by optical tracking of the interface between the carrier liquid and particle suspension that formed in the fluids over time. The rheological properties of the bidisperse MR fluids were investigat...

Morphological characterization of Coelogyne spp for germplasm conservation of orchids

Abstract: Orchid is one of the ornamental plant that has a high aesthetic value. Efforts to increase the quality of orchids can be done by genetic improvement through crossing. The first step to success in orchid crossing requires information on morphological characters of the prospective parents. This study aims to determine the similarity of six species of natural Coelogyne spp based on qualitative morphological characters. Morphological characterization of 6 orchids was carried out based on 30 characters including stem, leaf, flower, pseudobulb, and rooting type. Cluster analysis was carried out with the NTSYSpc program version 2.02i with the UPGMA SimQual function method. The results showed that there were morphological diversities among the six Coelogyne spp on the character of the stem, pseudobulb, leaves, flowers and type of roots. Based on the dendrogram on 73% similarity, three major groups were obtained. The first group consisted of Coelogyne pandurata and Coelogyne rumphii, the second group was C. massangeana, C. mayeriana and C asperata, the third group was C. celebensis. Based on the morphological similarity of 87% there are two pairs of parents that have most successful chance to be crossed, C. pandurata with C. rumphii and C. mayeriana with C. asperata.

Problem-Based Learning Module of Environmental Changes to Enhance Students’ Creative Thinking Skill

Abstract: Creative thinking skills are important for long-term success. Empowering creative thinking skills which can be trained through problem-solving activities in learning, thereby promoting high cognitive engagement. This study aimed to test the effectiveness of the research and development product of Problem-Based Learning module of environmental changes in empowering students’ creative thinking skills. The research method used was the Quasi-experiment with nonequivalent control group design. The sample of the research was the tenth-graders of a Senior High School in Karanganyar district, Central Java. The sampling was cluster sampling by involving two classes, namely the Grade X-MIA 1 with 28 students and the X-MIA 4 with 28 students. The qualitative and quantitative-descriptive approaches were used to analyze the data. The result shows the mean of creative thinking skills score of experiment group is higher than the control group. This developed module could empower students’ creative thinking skills by problem-solving activities as needed for Indonesian educational goal . The study concludes that development module was constructed based on Problem-based Learning activities in the module could stimulate students solved and identified the problems with their ideas and developed their creative thinking.

Illocution on Speech Acts of Foreign Students in Indonesian Learning

Abstract: This research discusses illocution on speech acts of foreign students in Indonesian Language learning. Illocution is a speech that shows the state of language relating to the situation in general and aims to express something from the speaker to the partner. This research aims to describe the forms of illocution done by the Indonesian Language students. This is a qualitative study. Observation, interviews, and documentation methods are used to collect data. The data are the utterances containing illocutionary force (assertive, declaration, directives, commissive, and expressive) in learning activities. The data source in this research is the speech acts of a foreign student in Indonesian Language learning.