Papers by Suhardi Effendy
Material law of conservation of energy and momentum is abstract material. Practical tools are nee... more Material law of conservation of energy and momentum is abstract material. Practical tools are needed in learning to prove the law so that it can foster real learning for students. This research method is an experimental method that aims to find out how to test the energy conservation and momentum law practicum kit. The practicum kit consists of wheeled objects as loads, precision rails as slippery trajectories, and infrared sensor devices to detect the speed of motion of objects. The kits that have been compiled are then validated by experts before use. Kit validation results are valid. In the implementation of the kit testing the independent variables selected are object mass and slope height. The test results obtained that the kit equipped with infrared sensors is quite accurate in explaining the law of conservation of energy which is evidenced by the relative error that occurs is quite small, namely 1%. In testing the law of conservation of momentum obtained the result that the m...
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2017 UNJ, 2017
Telah dilakukan pemanfaatan ekstrak daun jati yang mengandung karotenoid untuk pewarna alami pada... more Telah dilakukan pemanfaatan ekstrak daun jati yang mengandung karotenoid untuk pewarna alami pada pembuatan cat tembok. Ekstrak daun jati direbus dengan air 350 ml sampai mendidih dan disaring dengan screen mash T100. Sebagai perekatnya digunakan campuran tepung tapioka dan kapur tohor sebanyak 75 gram dengan perbandingan komposisi (1:3, 1:1,3:1). Sebagai pelarut digunakan campuran aqudes, Lem PVAc dan semen putih. Pada penelitian ini proses pembuatan cat ialah dengan cara mencampurkan seluruh bahan dari pigmen, perekat, dan pelarut sampai homogen. Kualitas cat di tunjukan melalui uji viskositas, daya rekat dan densitas. Hasil penelitian ini menunjukkan bahwa komposisi formulasi cat yang paling baik terdapat pada variasi perekat dengan perbandingan 3 : 1 yang menghasil kan nilai densitas 1,3 gr/ml, viskositas 0,26 poise dan daya rekat 95 %. Kata-kata kunci: daun jati, cat tembok, uji viskositas, daya rekat dan densitas
Physics is an integral part of natural science. Basically physics is the study of natural phenome... more Physics is an integral part of natural science. Basically physics is the study of natural phenomena in the form of facts, concepts and laws that have been tested by a series of studies. This study aims to describe the implementation of reasoning learning by teachers in public high school students in the city of Palembang. This type of research is descriptive qualitative research. The research was conducted in seven Palembang City State Senior High Schools on Momentum and Impulse material. Subjects in this study consisted of seven teachers and 231 students from seven public high schools in the city of Palembang. Research subjects were determined through purposive sampling technique. The results showed that the implementation of reasoning learning activities was not optimal. Learning the reasoning done by the teacher is limited to reasoning activities which is the final conclusion of the thinking process without observing, asking questions and trying. The final conclusions made by stu...
Article Info Abstract Article history: Received September 2018 Accepted November 2018 Published D... more Article Info Abstract Article history: Received September 2018 Accepted November 2018 Published December 2018 The growth of the manufacturing industry in Indonesia affects on the demand of automotive parts. This study aims see the mechanical properties of organic brake canvas made from durian fruit skin and teak leaves. Composite making was done by smoothing durian fruit and teak leaves to become powder. The resulting powder was filtered with mesh 60 so that the particle size is the same so as to facilitate mixing. After that, simple mixing with other ingredients such as magnesium oxide and polyester resin is carried out. The printing process was carried out with a hydraulic press with a load of 4 tons for 3 hours. The brake canvas produced were tested for hardness, wear resistance, and absorbency by varying the percentage composition of the powder of durian fruit fiber and teak leaves. There are five variations in the percentage of composite material composition tested. The results...
Jurnal Bahan Alam Terbarukan
The growth of the manufacturing industry in Indonesia affects on the demand of automotive parts. ... more The growth of the manufacturing industry in Indonesia affects on the demand of automotive parts. This study aims see the mechanical properties of organic brake canvas made from durian fruit skin and teak leaves. Composite making was done by smoothing durian fruit and teak leaves to become powder. The resulting powder was filtered with mesh 60 so that the particle size is the same so as to facilitate mixing. After that, simple mixing with other ingredients such as magnesium oxide and polyester resin is carried out. The printing process was carried out with a hydraulic press with a load of 4 tons for 3 hours. The brake canvas produced were tested for hardness, wear resistance, and absorbency by varying the percentage composition of the powder of durian fruit fiber and teak leaves. There are five variations in the percentage of composite material composition tested. The results obtained the percentage of the most optimum composition that has a value of hardness, wear wear resistance, a...
Jurnal SAINMATIKA, 2018
The purpose of this study was to determine the physical properties of wall paint by utilizing tea... more The purpose of this study was to determine the physical properties of wall paint by utilizing teak leaf extract containing carotenoids as natural dyes. Exploration of teak leaf extract is done by boiling teak leaves using 350 ml of water until boiling and filtering with screen mash T100. As an adhesive used 75 grams of tapioca flour and quicklime mixture with a composition ratio of 1: 3, 1: 1 and 3: 1. The solvents used are aqudes and fillers are white cement and PVAc glue. In this study the process of making paint is done by mixing all ingredients from pigments, adhesives, and solvents until homogeneous. Testing of the physical properties of paint, carried out through the test density, viscosity, and adhesion. The results of this study indicate that the composition of the most optimum paint formulation is found in the variation of adhesive with a ratio of 3: 1 which results in a density value of 1.26 gr / ml, viscosity 0.26 poise and adhesion power of 95% Keywords: density test, viscosity, teak leaves and wall paint Tujuan dari penelitian ini mengetahui sifat fisik cat tembok dengan memanfaatkan ekstrak daun jati yang mengandung karotenoid sebagai pewarna alami. Eksplorasi ekstrak daun jati dilakukan dengan merebus daun jati menggunakan air 350 ml sampai mendidih dan disaring dengan screen mash T100. Sebagai perekatnya digunakan campuran tepung tapioka dan kapur tohor sebanyak 75 gram dengan perbandingan komposisi 1:3, 1:1 dan 3:1. Pelarut yang digunakan aqudes dan bahan pengisi adalah semen putih dan lem PVAc. Pada pe dengan mencampurkan seluruh bahan dari pigmen, perekat, dan pelarut sampai homogen. Pengujian sifat fisik cat, dilakukan melalui uji densitas, viskositas, dan daya rekat. Hasil penelitian ini menunjukkan bahwa ko optimum terdapat pada variasi perekat dengan perbandingan 3:1 yang menghasilkan nilai densitas 1,26 gr/ml, viskositas 0,26 poise dan daya rekat Kata Kunci:uji densitas, viskositas, daun jati dan cat tembok PENDAHULUAN Pigmen atau zat warna sering digunakan sebagai bahan tambahan pada produk pangan dan tekstil karena dapat memperbaiki tampilan warna dan Ferlina, F., 2005). Pewarna alami Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Volume 16 No. ABSTRACT The purpose of this study was to determine the physical properties of wall paint by utilizing teak leaf extract containing carotenoids as natural dyes. Exploration of teak f extract is done by boiling teak leaves using 350 ml of water until boiling and filtering with screen mash T100. As an adhesive used 75 grams of tapioca flour and quicklime mixture with a composition ratio of 1: 3, 1: 1 and 3: 1. The solvents used des and fillers are white cement and PVAc glue. In this study the process of making paint is done by mixing all ingredients from pigments, adhesives, and solvents until homogeneous. Testing of the physical properties of paint, carried out through the density, viscosity, and adhesion. The results of this study indicate that the composition of the most optimum paint formulation is found in the variation of adhesive with a ratio of 3: 1 which results in a density value of 1.26 gr / ml, viscosity e and adhesion power of 95%. density test, viscosity, teak leaves and wall paint ABSTRAK Tujuan dari penelitian ini mengetahui sifat fisik cat tembok dengan memanfaatkan ekstrak daun jati yang mengandung karotenoid sebagai pewarna alami. Eksplorasi ekstrak daun jati dilakukan dengan merebus daun jati menggunakan air 350 ml sampai disaring dengan screen mash T100. Sebagai perekatnya digunakan campuran tepung tapioka dan kapur tohor sebanyak 75 gram dengan perbandingan komposisi 1:3, 1:1 dan 3:1. Pelarut yang digunakan aqudes dan bahan pengisi adalah semen putih dan lem PVAc. Pada penelitian ini proses pembuatan cat dilakukan dengan mencampurkan seluruh bahan dari pigmen, perekat, dan pelarut sampai homogen. Pengujian sifat fisik cat, dilakukan melalui uji densitas, viskositas, dan daya rekat. Hasil penelitian ini menunjukkan bahwa komposisi formulasi cat yang paling optimum terdapat pada variasi perekat dengan perbandingan 3:1 yang menghasilkan nilai densitas 1,26 gr/ml, viskositas 0,26 poise dan daya rekat 95%. uji densitas, viskositas, daun jati dan cat tembok Pigmen atau zat warna sering digunakan sebagai bahan tambahan pada produk pangan dan tekstil karena dapat memperbaiki tampilan warna (Yuliani, A Pewarna alami masih dapat dipakai dengan mengombinasikan zat warna sintetis misalnya, setelah diwarnai dengan zat warna alam hasilnya digabung dengan Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam DOI 10.31851/sainmatika.v16i1.3125 index.php/sainmatika 9 Uji Sifat Fisik Cat Tembok yang Memanfaatkan pigmen warna Alami 3 The purpose of this study was to determine the physical properties of wall paint by utilizing teak leaf extract containing carotenoids as natural dyes. Exploration of teak f extract is done by boiling teak leaves using 350 ml of water until boiling and filtering with screen mash T100. As an adhesive used 75 grams of tapioca flour and quicklime mixture with a composition ratio of 1: 3, 1: 1 and 3: 1. The solvents used des and fillers are white cement and PVAc glue. In this study the process of making paint is done by mixing all ingredients from pigments, adhesives, and solvents until homogeneous. Testing of the physical properties of paint, carried out through the density, viscosity, and adhesion. The results of this study indicate that the composition of the most optimum paint formulation is found in the variation of adhesive with a ratio of 3: 1 which results in a density value of 1.26 gr / ml, viscosity Tujuan dari penelitian ini mengetahui sifat fisik cat tembok dengan memanfaatkan ekstrak daun jati yang mengandung karotenoid sebagai pewarna alami. Eksplorasi ekstrak daun jati dilakukan dengan merebus daun jati menggunakan air 350 ml sampai disaring dengan screen mash T100. Sebagai perekatnya digunakan campuran tepung tapioka dan kapur tohor sebanyak 75 gram dengan perbandingan komposisi 1:3, 1:1 dan 3:1. Pelarut yang digunakan aqudes dan bahan pengisi adalah nelitian ini proses pembuatan cat dilakukan dengan mencampurkan seluruh bahan dari pigmen, perekat, dan pelarut sampai homogen. Pengujian sifat fisik cat, dilakukan melalui uji densitas, viskositas, dan daya mposisi formulasi cat yang paling optimum terdapat pada variasi perekat dengan perbandingan 3:1 yang menghasilkan masih dapat dipakai dengan mengombinasikan zat warna sintetis setelah diwarnai dengan zat warna alam hasilnya digabung dengan
Journal of Innovative Science Education, 2018
This study aims to determine the ability of analytic thinking students especially deaf students. ... more This study aims to determine the ability of analytic thinking students especially deaf students. Analytic is included in thinking skills that lead students to become independent thinkers and able to demonstrate the quality of students' abilities. There are 3 stages in analytic thinking, namely differentiating, attributing and connecting. The method used in the study is mixed methods with concurent strategies. The subject of this research is State Public High School for Deaf students. The improvement of students' analytical thinking ability is 0.22 and included in the low category. The results of the percentage value of deaf students for differentiating indicators was 56.94%, attributed to 43.05%, and linking by 71.11%.
Jurnal Bahan Alam Terbarukan, 2018
The growth of the manufacturing industry in Indonesia affects on the demand of automotive parts. ... more The growth of the manufacturing industry in Indonesia affects on the demand of automotive parts. This study aims see the mechanical properties of organic brake canvas made from durian fruit skin and teak leaves. Composite making was done by smoothing durian fruit and teak leaves to become powder. The resulting powder was filtered with mesh 60 so that the particle size is the same so as to facilitate mixing. After that, simple mixing with other ingredients such as magnesium oxide and polyester resin is carried out. The printing process was carried out with a hydraulic press with a load of 4 tons for 3 hours. The brake canvas produced were tested for hardness, wear resistance, and absorbency by varying the percentage composition of the powder of durian fruit fiber and teak leaves. There are five variations in the percentage of composite material composition tested. The results obtained the percentage of the most optimum composition that has a value of hardness, wear wear resistance, and absorption capacity close to the value of the Indonesian National Standard (SNI 09-0143).
International Conference on Science and Education and Technology 2018, 2018
Reasoning is an indispensable ability of learners in physics learning as it is related to the lea... more Reasoning is an indispensable ability of learners in physics learning as it is related to the learning
outcomes achieved. This study aims to obtain a picture of scientific reasoning in 231 high school students in
Palembang City in academic year 2017/2018. The type of this research is descriptive research with survey
method. The ability of scientific reasoning and mastery of the physics concepts of students was obtained
through written test in the form of multiple choice reasons. Problems used in the study contained 18 items
with details of 12 questions about scientific reasoning and 6 questions about mastery of physics concepts.
The result of the research shows the scientific reasoning ability of high school students was in the low
category and the mastery of physics concept of students remained in the medium category.
___________________________________________________________________ Pedagogical content knowledge... more ___________________________________________________________________ Pedagogical content knowledge is a combination of understanding knowledge material (content knowledge) and ways of educating (pedagogical knowledge). The purpose of this study is to improve student learning outcomes and interests through the implementation of multimedia assisted pedagogical content knowledge. The research method used is control group pretest-posttest design. Data collection was done by test and questionnaire. Data analysis using t test and gain test. The results showed that there was an increase in learning outcomes by the implementation of pedagogical content knowledge (PCK) with t count > t table and N-gain score of student learning outcomes of 0.60. Questionnaire results show the high interest of students in learning by using multimedia of Rectilinear motion.
___________________________________________________________________ This study aims to describe t... more ___________________________________________________________________ This study aims to describe the implementation of the scientific approach carried out by teachers of State High Schools in Boyolali District. The study used a qualitative descriptive method. The research was carried out on three state high school in Boyolali Regency which were grouped according to the accreditation value. The research subjects were 3 physics teachers of class X and class X students of State High Schools in Boyolali Regency totaling 96 students. The instruments used are observation sheets, questionnaires, and interview guidelines. The results showed that the implementation of the scientific approach in Boyolali District High School was classified as medium. The highest core activity is observing and the lowest is trying. The factors that influence the implementation of the scientific approach by the teacher are infrastructure and laboratory facilities, and time constraints so that the teacher spends time on learning exercises.
Abstrak Telah dilakukan pemanfaatan ekstrak daun jati yang mengandung karotenoid untuk pewarna al... more Abstrak Telah dilakukan pemanfaatan ekstrak daun jati yang mengandung karotenoid untuk pewarna alami pada pembuatan cat tembok. Ekstrak daun jati direbus dengan air 350 ml sampai mendidih dan disaring dengan screen mash T100. Sebagai perekatnya digunakan campuran tepung tapioka dan kapur tohor sebanyak 75 gram dengan perbandingan komposisi (1:3, 1:1,3:1). Sebagai pelarut digunakan campuran aqudes, Lem PVAc dan semen putih. Pada penelitian ini proses pembuatan cat ialah dengan cara mencampurkan seluruh bahan dari pigmen, perekat, dan pelarut sampai homogen. Kualitas cat di tunjukan melalui uji viskositas, daya rekat dan densitas. Hasil penelitian ini menunjukkan bahwa komposisi formulasi cat yang paling baik terdapat pada variasi perekat dengan perbandingan 3 : 1 yang menghasil kan nilai densitas 1,3 gr/ml, viskositas 0,26 poise dan daya rekat 95 %. Kata-kata kunci: daun jati, cat tembok, uji viskositas, daya rekat dan densitas Abstract The utilization of teak leaf extract containing carotenoids for natural dyes on the manufacture of wall paint. Teak leaf extract boiled with 350 ml of water until boiling and filtered with screen mash T100. As glue is used a blend of tapioca flour and lime tohor as much as 75 grams with composition ratio (1: 3, 1: 1,3: 1). As a solvent used mix aqudes, PVAc glue and white cement. In this research, the process of making paint is by mixing all the material from pigment, adhesive, and solvent until homogeneous. Paint quality is shown through viscosity test, adhesion and density. The results of this study indicate that the best paint formulation composition is found in adhesive variation with a ratio of 3: 1 which produces density 1,3 gr/ml, viscosity 0,26 poise and 95% adhesion. PENDAHULUAN Alam semesta ini memiliki banyak kekayaan. Allah SWT telah menciptakan beragam spesies makhluk hidup dengan membawa (mempunyai kemampuan membuat) suatu zat di bagian tubuhnya sehingga dunia kita menjadi bergam. Zat tersebut adalah beragam pigmen pada makhluk hidup. Pigmen adalah suatu zat yang memberi kesan warna pada benda berdasarkan responya terhadap cahaya, baik yang dipantul maupun yang diserap. Pigmen atau zat warna sering digunakan sebagai bahan tambahan pada roduk pangan dan produk tekstil karena dapat memperbaiki tampilan warna [1]. Zat warna alami dapat diperoleh dari tanaman atau hewan. Warna alami ini meliputi pigmen yang terdapat dalam bahan atau terbentuk melalui proses pemanasan, penyimpanan atau perlakuan tertentu. Warna alam seperti klorofil, karotenoid, antosianin, brazilen tanin dan lain-lain apabila
___________________________________________________________________ Material law of conservation ... more ___________________________________________________________________ Material law of conservation of energy and momentum is abstract material. Practical tools are needed in learning to prove the law so that it can foster real learning for students. This research method is an experimental method that aims to find out how to test the energy conservation and momentum law practicum kit. The practicum kit consists of wheeled objects as loads, precision rails as slippery trajectories, and infrared sensor devices to detect the speed of motion of objects. The kits that have been compiled are then validated by experts before use. Kit validation results are valid. In the implementation of the kit testing the independent variables selected are object mass and slope height. The test results obtained that the kit equipped with infrared sensors is quite accurate in explaining the law of conservation of energy which is evidenced by the relative error that occurs is quite small, namely 1%. In testing the law of conservation of momentum obtained the result that the momentum value of the two objects before the collision approaches the momentum value after the collision. The kit testing results become a solution and innovation as a practical tool to help with more tangible learning.
___________________________________________________________________ Physics is an integral part o... more ___________________________________________________________________ Physics is an integral part of natural science. Basically physics is the study of natural phenomena in the form of facts, concepts and laws that have been tested by a series of studies. This study aims to describe the implementation of reasoning learning by teachers in public high school students in the city of Palembang. This type of research is descriptive qualitative research. The research was conducted in seven Palembang City State Senior High Schools on Momentum and Impulse material. Subjects in this study consisted of seven teachers and 231 students from seven public high schools in the city of Palembang. Research subjects were determined through purposive sampling technique. The results showed that the implementation of reasoning learning activities was not optimal. Learning the reasoning done by the teacher is limited to reasoning activities which is the final conclusion of the thinking process without observing, asking questions and trying. The final conclusions made by students are only based on the teacher's explanation of the one-way learning process. This can be seen from the percentage of the implementation of reasoning activities on the scientific approach that gets a percentage of 39.04% and is included in the medium category.
ABSTRAK Siswa akan mudah mempelajari sesuatu bila cara penyampaian atau teknik pembelajaran yang ... more ABSTRAK Siswa akan mudah mempelajari sesuatu bila cara penyampaian atau teknik pembelajaran yang digunakan guru mudah dipahami dan menyenangkan bagi siswa, terlebih bila siswa diberi kesempatan umtuk mengungkapkan pendapat mereka secara langsung. Dari hal tersebut akhirnya telah berhasil dilakukan penelitian eksperimen di kelas VIII SMP Negeri 55 Palembang. Model pembelajaran kooperatif dengan teknik pencarian informasi digunakan dalam pembelajaran fisika pada kelas eksperimen. Hasil dari penelittian ini terdapat pengaruh yang signifikan terhadap hasil belajar fisika setelah di uji dengan uji statisik non parametik yaitu uji Mann-Whitney dengan taraf signifikansi α = 0,05. Hal ini dapat di lihat dari nilai probabilitas yang di dapat yaitu dibawah 0,05 (0,02<0,05) yang menunjukkan ada pengaruh penggunan model pembelajaran kooperatif dengan teknik pencarian informasi. Kata kunci : Model Pembelajaran Kooperatif, Pencarian Informasi, Hasil Belajar PENDAHULUAN Pendidikan adalah seluruh kegiatan belajar yang direncanakan, dengan materi terorganisasi, dilaksanakan secara terjadwal dalam sistem pengawasan, dan diberikan evaluasi berdasarkan pada tujuan yang telah ditentukan (Suhartono, 2006:84). Secara umum, proses pembelajaran dalam pendidikan itu bertujuan untuk mengembangkan potensi peserta didik agar menjadi manusia yang beriman dan bertakwa kepada Tuhan Yang Maha Esa, berakhlak mulia, sehat, berilmu, cakap, kreatif, mandiri, dan menjadi warga negara yang demokratis serta bertanggung jawab (Trianto, 2009:1). Oleh karena itu, keberhasilan di dalam dunia pendidikan banyak tertumpu kepada bagaimana proses mengajar yang dilakukan oleh seorang guru. Pada kenyataannya dalam melaksanakan kegiatan belajar mengajar, guru masih dominan menerapkan proses pembelajaran konvensional (Trianto, 2009:6). Pada proses pembelajaran konvensional suasana kelas cenderung teacher-centered sehingga siswa menjadi pasif. Berdasarkan hal tersebut proses pembelajaran di kelas cenderung monoton yang menyebabkan hasil belajar menjadi kurang baik. Hal ini berdasarkan pada jawaban yang diberikan siswa pada saat berlangsungnya proses belajar, walaupun siswa menjawab soal dengan benar namun mereka tidak dapat mengungkapkan alasan jawaban mereka yang dikarenakan mereka tidak memahami apa yang dipelajari. Keadaan demikian terjadi karena di dalam proses pembelajaran tersebut siswa kurang diberi kesempatan dalam
Pendidikan adalah seluruh kegiatan belajar yang direncanakan, dengan materi terorganisasi, dilaks... more Pendidikan adalah seluruh kegiatan belajar yang direncanakan, dengan materi terorganisasi, dilaksanakan secara terjadwal dalam sistem pengawasan, dan diberikan evaluasi berdasarkan pada tujuan yang telah ditentukan (Suhartono, 2006:84). Secara umum, proses pembelajaran dalam pendidikan itu bertujuan untuk mengembangkan potensi peserta didik agar menjadi manusia yang beriman dan bertakwa kepada Tuhan Yang Maha Esa, berakhlak mulia, sehat, berilmu, cakap, kreatif, mandiri, dan menjadi warga negara yang demokratis serta bertanggung jawab (Trianto, 2009:1).
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Papers by Suhardi Effendy
outcomes achieved. This study aims to obtain a picture of scientific reasoning in 231 high school students in
Palembang City in academic year 2017/2018. The type of this research is descriptive research with survey
method. The ability of scientific reasoning and mastery of the physics concepts of students was obtained
through written test in the form of multiple choice reasons. Problems used in the study contained 18 items
with details of 12 questions about scientific reasoning and 6 questions about mastery of physics concepts.
The result of the research shows the scientific reasoning ability of high school students was in the low
category and the mastery of physics concept of students remained in the medium category.
outcomes achieved. This study aims to obtain a picture of scientific reasoning in 231 high school students in
Palembang City in academic year 2017/2018. The type of this research is descriptive research with survey
method. The ability of scientific reasoning and mastery of the physics concepts of students was obtained
through written test in the form of multiple choice reasons. Problems used in the study contained 18 items
with details of 12 questions about scientific reasoning and 6 questions about mastery of physics concepts.
The result of the research shows the scientific reasoning ability of high school students was in the low
category and the mastery of physics concept of students remained in the medium category.