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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Journal of Applied Agricultural Science and Technology Jurnal Pendidikan MIPA
Endi Suhendi
Universitas Pendidikan Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Environmental Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics

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Desain Instrumen Rubrik Kemampuan Berkolaborasi Siswa SMP dalam Materi Pemantulan Cahaya Hermawan Hermawan; Parsaoran Siahaan; Endi Suhendi; Ida Kaniawati; Achmad Samsudin; Anggi Hanif Setyadin; Syarif Rokhmat Hidayat
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 3 No 2 (2017): JPPPF - Jurnal Penelitian & Pengembangan Pendidikan Fisika, Volume 3 Nomor 2, Des
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.835 KB) | DOI: 10.21009/1.03207

Abstract

Abstract This study aims to develop a rubric of students' collaboration skills in junior high school on light reflection materials. The collaboration skills are one of the important competencies of the 21st century so that teachers in the field must have their rubric to measure students' collaboration skills. The rubric is based on the adaptation and modification of the collaboration skills section of the International Reading Association (IRA) (2005). The research method used is the method of research and development of 4D (define, design, develop and disseminate) 2D (restricted and design) design model. Aspects that are adapted and modified are contributions, time management, problem solving, working with others and research techniques that are trained on the activity of light reflecting material. Each aspect is given a score of 1 - 4 with 1 (less), 2 (sufficient), 3 (good) and 4 (excellent). Through the define and design stage, a collaboration scoring rubric for junior high school students has been developed in light reflection materials based on adaptation and modification of the collaboration skills framework of the International Reading Association (IRA) (2005). Keywords: collaboration skills, collaboration rubric skills, group investigation. Abstrak Penelitian ini bertujuan untuk mengembangkan rubrik penilaian kemampuan berkolaborasi siswa SMP terkait materi pemantulan cahaya. Kemampuan berkolaborasi adalah salah satu kompetensi penting abad ke-21 sehingga guru di lapangan harus memiliki rubrik tersendiri untuk mengukur kemampuan berkolaborasi siswa. Rubrik disusun berdasarkan adaptasi dan modifikasi rubrik kemampuan berkolaborasi dari International Reading Association (IRA) (2005). Metode penelitian yang digunakan adalah metode penelitian dan pengembangan model intruksional 4D (define, design, develop and disseminate) yang dibatasi hanya 2D (define and design). Aspek yang diadaptasi dan dimodifikasi yaitu kontribusi, manajemen waktu, pemecahan masalah, bekerja dengan orang lain dan teknik penyelidikan yang dilatihkan pada kegiatan percobaan pemantulan cahaya. Setiap aspek diberi skor 1 - 4 dengan keterangan 1 (kurang), 2 (cukup), 3 (baik) dan 4 (sangat baik). Melalui tahap define dan design yang dilakukan, telah dikembangkan rubrik penilaian kemampuan berkolaborasi untuk siswa SMP dalam materi pemantulan cahaya berdasarkan adaptasi dan modifikasi rubrik kemampuan berkolaborasi dari International Reading Association (IRA) (2005). Kata-kata Kunci: kemampuan berkolaborasi, rubrik kemampuan berkolaborasi, grup investigasi.
PENGARUH WAKTU POSTSINTERING HEAT TREATMENT (PHT) PADA KONDUKTIVITAS IONIK ELEKTROLIT PADAT CALCIA STABILIZED ZIRCONIA (CSZ) YANG MENGANDUNG SILICA (SiO2) DAN MAGNESIA (MgO) Herdyka Sulistiardi; Dani Gustaman Syarif; Endi Suhendi
Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Vol 17, No 1 (2016): Februari 2016
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (356.384 KB) | DOI: 10.17146/jstni.2016.17.1.2275

Abstract

PENGARUH WAKTU POSTSINTERING HEAT TREATMENT (PHT) PADA KONDUKTIVITAS IONIK ELEKTROLIT PADAT CALCIA STABILIZED ZIRCONIA (CSZ) YANG MENGANDUNG SILICA (SiO2) DAN MAGNESIA (MgO). Pengaruh waktu Postsintering Heat Treatment (PHT) pada konduktivitas ionik elektrolit padat CSZ yang mengandung SiO2 dan MgO telah diteliti. PHT dilakukan dengan tujuan untuk meningkatkan konduktivitas ionik elektrolit padat CSZ yang mengandung SiO2 dan MgO. Elektrolit padat CSZ yang mengandung SiO2 dan MgO dibuat menggunakan metode pressing dengan komposisi CSZ, SiO2, dan MgO berturut-turut 99 %berat, 0,5 %berat, dan 0,5 %berat. Pelet kemudian disinter pada suhu 1450ᵒC selama 4 jam dan PHT pada suhu 1350ᵒC dengan variasi waktu 0 jam, 4 jam, dan 8 jam. Analisis struktur kristal menunjukkan bahwa pelet yang telah dibuat membentuk kristal kubik dan tidak terpengaruh PHT. Analisis densitas menunjukkan bahwa terjadi peningkatan densitas seiring peningkatan waktu PHT tetapi peningkatan tersebut tidak begitu signifikan. Analisis struktur mikro menunjukkan bahwa tidak terdapat perbedaan ukuran butir yang signifikan seiring peningkatan waktu PHT, namun terjadi perubahan distribusi pori. Berdasarkan penelitian yang telah dilakukan diketahui bahwa seiring peningkatan waktu PHT terjadi pula peningkatan konduktivitas ionik elektrolit padat CSZ yang mengandung SiO2 dan MgO.
Review Penggunaan Reduced Graphene Oxide/TiO2 sebagai Fotoelektrode pada Dye-Sensitized Solar Cell Eka Cahya Prima; Meilisyah Putri Utami; Andhy Setiawan; Endi Suhendi
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol 6 No 1 (2022): May Edition
Publisher : Program Studi Pendidikan Fisika STKIP Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v6i1.1146

Abstract

Many studies on graphene applied to DSSC have been carried out with the aim of increasing the efficiency of power conversion in organic solar cells. This research was conducted to find the best composition of soar cells so that they can be utilized and converted into electrical energy. The use of graphene as a photoanode can increase the conversion efficiency along with good electrical conductivity values in graphene. This review aims to analyze the process of increasing power conversion efficiency in DSSC caused by the addition of graphene to TiO2 which acts as a photoanode in DSSC during the last five years. The results of the measurement of DSSC efficiency increased when the addition of reduced graphene oxide to TiO2 was carried out.
Developing MOFI on Transverse Wave to Explore Students’ Misconceptions Today: Utilizing Rasch Model Analysis Shobrina Nurul Mufida; Ida Kaniawati; Achmad Samsudin; Endi Suhendi
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 5 (2022): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i5.2229

Abstract

This research aimed to describe the diagnostic instrument validity from Multi-representation of Four-tier Instrument on Transverse Wave (MOFI-OTW), which is useful in exploring the misconceptions. The ADDIE (Analyzing, Designing, Developing, Implementing, and Evaluating) model has already been utilized as the research method. In the developing stage, item construction is in the form of multi-representation (statements, pictures, graphs, tables, and mathematical symbols). The sample consisted of 81 high school students aged 16-18 years (23 males called “Cung” and 58 females called “Nduk”) in East Java. Data validity, instrument reliability, and distribution of students' conceptions have been analyzed using the Rasch Model with MINISTEP 4.7.0.0 software. Validity based on item dimensionality is valid. The reliability based on Cronbach Alpha (α) is good category, the value of item reliability is very good category, and person reliability is moderat category. Students’ conceptions are categorized as Sound Understanding (SU), Partial Understanding Positive (PUP), Partial Understanding Negative (PUN), No Understanding (NU), Misconception (MC), and No Coding (NC). The largest conception category is MC. Misconceptions are still found in the sub-concept of transverse wave in various representations. In conclusion, MOFI-OTW can be developed through the ADDIE model by utilizing the Rasch analysis and used to explore students' conceptions and misconceptions.
The Effect of Couple Doping Gd and Co on The Physical Characteristics of LaFeO3 Thick Film for Acetone Gas Sensor Application Hendi Haryadi; Dani Gustaman Syarif; Endi Suhendi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 12 No. 2 (2022)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v12n2.p115-126

Abstract

The acetone gas sensor is one type of sensor being researched for its application because it detects the presence of diabetes in sufferers. Gas sensors with high sensitivity and low operating temperature have been extensively investigated for this purpose, and this research is focused on the same purpose. Synthetization and characterization of LaFeO3 with co-doping Gd2O3 and CoO thick film ceramics for acetone gas sensor was conducted. LaFeO3 was made using the co-precipitation method with 2.5% CoO for each and 0%, 2.5%, and 5% Gd2O3 variation to the LaFeO3. The LaFeO3 thick film was prepared using the screen-printing technique and calcined at 800°C for two hours. The analysis of crystal structure characterization using X-Ray Diffraction (XRD) resulted in LaFeO3 with co-doping Gd2O3 and CoO thick film ceramics having the same cubic crystal phase with smaller lattice parameters and crystallite sizes after doping were added. The results of morphology structure characterization using Scanning Electron Microscopy (SEM) showed the grain size of the LaFeO3 with co-doping 2.5% CoO and 0%, 2.5%, and 5% Gd2O3 samples to support the analysis of electric property characterization later on. The electric property characterization showed that LaFeO3 with various Gd2O3 concentrations, as part of co-doping with 2.5% CoO, resulted in higher sensitivity compared to the lacking of Gd2O3 one. In order, the maximum sensitivity values of each Gd2O3 concentration are 2.74, 3.06, and 8.76 when exposed to 270 ppm acetone gas at 310°C. Gd2O3, as part of co-doping in LaFeO3 with CoO 2.5%, has successfully increased the sensitivity to the gas sensor yet still can not meet the expectation towards the operating temperature, which is still high compared to other references.
The Effect of Temperature and Roasting Time on The Physical Properties of Arabica and Robusta Gayo Coffee Bean Elin Yusibani; Ikramullah ikramullah; Evi Yufita; Zulkarnain Jalil; Endi Suhendi
Journal of Applied Agricultural Science and Technology Vol. 7 No. 2 (2023): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v7i2.75

Abstract

The effect of variations in temperature and roasting time on the physical properties of coffee beans originating from the Gayo highlands with Arabica and Robusta types have been studied in this paper. Physical properties measured include weight loss, true density, porosity, and water content. The measurement procedure follows Standard Nasional Indonesia (SNI) 01-2907-2008. Three roasting levels were used in this study, i.e., Light Roast (159 -164 °C), Medium Roast (211 - 215 °C), and Dark Roast (above 232 °C) by an oven. The result showed that the weight loss for Arabica and Robusta coffee beans is from 11 - 19% and 14 - 29%, respectively. The true density for Arabica and Robusta coffee beans ranged from 0.905 - 1.085 g/cm3 and 0.950 - 1.156 g/cm3, respectively. The difference in porosity changes before and after roasting was 23 - 73% for Arabica and 33 - 68% for Robusta coffee beans. Meanwhile, the water content of Arabica and Robusta coffee beans after roasting is 0.7 - 5% and 0.6 - 6%, respectively. The value of the weight loss, true density, and water content of Arabica is lower than that of the Robusta coffee bean, while the porosity value of Arabica is higher than that of the Robusta coffee bean.
CoSiReT: Innovation of ReT (Refutation Texts) to Reduce Students' Misconceptions Concerning Transverse Waves Shobrina Nurul Mufida; Achmad Samsudin; Endi Suhendi; Ida Kaniawati; Hera Novia
Jurnal Penelitian Pendidikan IPA Vol 9 No 11 (2023): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i11.4544

Abstract

The research goal was to develop innovative learning media on refutation texts (ReT), scilicet integrating Computer Simulations on Refutation Texts (CoSiReT). CoSiReT's role is to reduce students' misconceptions concerning the basic concept of transverse waves. This research design used 4D (Define, Design, Develop, and Disseminate). Participants include 64 students aged 16-18 years in the Tuban region, East Java, Indonesia (37 male were called Mas, and 27 female were called Mbak). The research instrument used a media validation sheet (15 assessment indicators). The pre-post test instrument used the Multi-representation of a Four-tier Instrument on Transverse Wave (MOFI-OTW). Analysis of data validation results was using a rater test assisted by Rasch's Mini-Facets software. According to the seven validators, the results of CoSiReT fulfill aspects of instructions for use, language, content presentation, and appearance. The percentage of students' misconception reduction was analyzed using the Reduction Misconceptions (RM) adapted from Hake's n-gain equation. Overall, the reduction of misconceptions is in the high category. Thus, it can be concluded that CoSiReT can be developed and used a role in reducing student misconceptions. Researchers or practitioners are expected to implement CoSiReT as a learning innovation that aims to reduce basic misconceptions of transverse waves.
MoIP-ST: An Instrument to Measure Students’ Problem Solving Skills on Momentum and Impulse Itsna Rona Wahyu Astuti; Ida Kaniawati; Achmad Samsudin; Endi Suhendi; Supardiyono Supardiyono; Andreas Suparman; Rona Hegarna; Rosi Vera
Jurnal Pendidikan MIPA Vol 23, No 4 (2022): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research aims to develop the MoIP-ST (Momentum and Impulse ProblemSolving Test) instrument to measure students' problem-solving abilities according to the stages of problem-solving skills. The research method used is 4). The research participants were 64 students, consisting of 32 rural and 32 urban 10th-grade students in East Java, who were randomly selected. The first analysis is a multi-rater Rasch measurement based on the results of expert validation, which indicates that item I1 needs improvement. The second analysis is the analysis of the MoIP-ST instrument using the Rasch model, which shows that overall the items on the MoIP-ST are valid and reliable with a Cronbach Alpha of 0.87. The third analysis is the use of the MoIP-ST, which shows that the problem-solving ability of rural students is lower than that of urban students. Student problem-solving needs to be improved through models, methods, learning models, and teaching materials that support problem-solving.Keywords: test instrument, problem solving skills, physics learning.
Co-Authors Achmad Samsudin Agus Danawan Andhy Setiawan Andreas Suparman Anggi Hanif Setyadin Dani Gustaman Syarif Dani Gustaman Syarif Eka Cahya Prima Elin Yusibani Ermawati Dewi Evi Yufita Hendi Haryadi Hera Novia Herdyka Sulistiardi Hermawan Hermawan Ida Kaniawati Ikramullah ikramullah Indah Safitri Itsna Rona Wahyu Astuti Iyon Suyana Meilisyah Putri Utami NURUL MUFIDA, SHOBRINA Parlindungan Sinaga Parsaoran Siahaan Rona Hegarna Rosi Vera Supardiyono Supardiyono Syarif Rokhmat Hidayat TATI NURHAYATI Zulkarnain Jalil