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All Journal JSKK (Jurnal Sains Keolahragaan dan Kesehatan) Jurnal Otomasi Kontrol dan Instrumentasi JURNAL EKSAKTA PENDIDIKAN (JEP) Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika
Yulkifli Yulkifli
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Other

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INSTRUMEN KECEPATAN TENDANGAN PENCAK SILAT Nurul Ihsan; Yulkifli Yulkifli; Yohandri Yohandri
JSKK (Jurnal Sains Keolahragaan dan Kesehatan) Vol 3 No 1 (2018)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jskk.2018.3.1.4

Abstract

Permasalahan utama dalam penelitian ini adalah belum tersedianya instrument kecepatan tendangan pencak silat yang berbasis teknologi. Tujuan penelitian ini adalah menciptakan instrument kecepatan tendangan berbasis teknologi. Penelitian ini merupakan kelanjutan dari penelitian sebelumnya yang menghasilkan desain rancangan instrumen yang telah teruji secara empiris. Metode penelitian dalam penelitian ini adalah penelitian pengembangan dan mengadopsi model Borg and Gall. Hasil uji reliabilitas yang menggunakan teknik test and retest, yaitu 0.671 pada kelompok sampel kecil dan 0.746 pada kelompok sampel besar sehingga diperoleh hasil memiliki kriteria yang "kuat". Persentase kecepatan reaksi akurasinya adalah 99. 334 persen, untuk kecepatan aksi adalah sebesar 99.288 persen. Hasil analisis Ini menunjukkan bahwa alat yang dikembangkan memiliki tingkat akurasi tinggi, dan layak dipergunakan sebagai instrumen kecepatan tendangan pencak silat.
Penentuan Karakteristik Dari Sistem Pengontrolan Kelajuan Motor DC Dengan Sensor Optocoupler Berbasis Mikrokontroler AT89S52 Asrizal Asrizal; Yulkifli Yulkifli; Melvi Sofia
Jurnal Otomasi Kontrol dan Instrumentasi Vol 4 No 1 (2012): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2012.4.1.4

Abstract

Artikel ini bertujuan untuk mendeskripsikan blok diagram sistem dan menganalisis karakteristik statik sistem pengontrolan kelajuan motor DC dengan sensor optocoupler berbasis mikrokontroler. Pada sistem pengontrolan, putaran motor DC diindra oleh optocoupler, keluaran sensor diproses melalui mikrokontroler AT89S52 dan hasilnya ditampilkan pada LCD. Sistem pengontrol dirancang untuk mengontrol kelajuan motor DC antara 20 sampai 30 rpm dengan selang waktu 1 sampai 12 menit. Penelitian yang dilakukan termasuk kedalam rekayasa. Pengukuran langsung dilakukan terhadap jumlah dan waktu putar motor DC. Pengukuran tidak langsung digunakan untuk menentukan kelajuan dari motor DC. Produk yang dihasilkan dan data yang didapatkan dari hasil pengukuran dianalisis melalui tiga cara yaitu metoda mendeskripsikan, teori kesalahan, dan metoda grafik. Berdasarkan hasil analisis terhadap produk dan data dapat dikemukakan tiga hasil penelitian ini. Pertama, rangkaian sistem pengontrolan dari tujuh elemen dasar yaitu: sensor optocoupler, mikrokontroler AT89S52, tombol setting dan selektor, LCD, SPC DC motor, motor DC dan catu daya teregulasi. Kedua, ketepatan rata-rata dari penunjuk jumlah putar dan waktu putar motor DC dari sistem pengontrolan masing-masing 99,122 dan 99,786. Ketelitian rata-rata dari penunjuk jumlah putar dan waktu putar dari sistem pengontrolan masing-masing 0,988 dan 0,994. Berarti ketepatan dan ketelitian dari sistem pengontrolan termasuk tinggi. Ketiga, pada tiga titik set kelajuan motor DC yang dirancang, dihasilkan jumlah putar motor DC naik secara linear dengan kenaikan waktu putar masing-masing kelajuan motor DC pada titik set adalah 20,331 RPM, 25,214 RPM, dan 30, 169 RPM.Keyword:Karakteristik, sistem, kontrol, optocoupler, mikrokontroler
Desain Sensor Getaran Frekuensi Rendah Berbasis Fluxgate Yulkifli Yulkifli; Hufri Hufri; Mitra Djamal; R. N. Setiadi
Jurnal Otomasi Kontrol dan Instrumentasi Vol 3 No 2 (2011): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2011.3.2.1

Abstract

Makalah ini menjelaskan kemampuan fluxgate untuk mengukur getaran dalam rentang frekuensi rendah. Getaran diukur  berdasarkan perubahan medan magnet luar terjadi karena adanya perubahan jarak antara probe sensor fluxgate dengan objek yang bergetar. Berdasarkan prinsip harmonisa kedua untuk fluxgate, besarnya intensitas medan magnet luar yang terukur sebanding tegangan keluaran sensor dan berbanding terbalik dengan jarak. Optimasi statik terhadap jarak maksimum (amplitudo) antara probe fluxgate dengan objek bergetar diperoleh ketika jarak 2 cm.  Sebagai sumber getaran digunakan peralatan mekanik frekuensi rendahmekanik yang dikembangkan oleh KK FTETI  di Labor Elektronika dan Instrumentasi Fisika ITB.  Berdasarkan pengukuran terhadap getaran frekuensi rendah, Fluxgate mampu mendeteksi frekuensi 0.14 sampai 1.15 Hz dengan kesalahan absolut 0.017 Hz dan kesalahan relatif 1.3 %.  Keyword: Desain, sensor, Getaran, frekuensi rendah,  fluxgate. 
Sistem Pengukuran Intensitas dan Durasi Penyinaran Matahari Realtime PC berbasis LDR dan Motor Stepper Mona Berlian Sari; Yulkifli Yulkifli; Zulhendri Kamus
Jurnal Otomasi Kontrol dan Instrumentasi Vol 7 No 1 (2015): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2015.7.1.5

Abstract

AbstrakPenyinaran matahari sebagai sumber energi yang penting bagi kehidupan merupakan salah satu parameter cuaca yang penting untuk diukur. Penelitian ini mendesain dan membuat sistem pengukuran intensitas dan durasi penyinaran matahari menggunakan mikrokontroller ATMEGA328 Arduino Uno dan satu buah sensor LDR yang pergerakannya diatur menggunakan motor stepper. Tampilan sistem menggunakan LCD dan PC. Data yang diukur disimpan secara otomatis dalam format *xls. Sistemmemiliki ketelitian rata-rata pengukuran intensitas cahaya matahari sebesar 0.9993 dengan persentase ketepatan rata-rata ialah 98,79%. Pada pengukuran durasi penyinaran matahari, sistem memiliki ketepatan rata-rata pengukuran sebesar 93,876%.Keywords: penyinaran matahari, durasi, intensitas, sistem pengukuran, motor stepper
PENGARUH LKPD BERBASIS MODEL DISCOVERY LEARNING PADA MATERI ROTASI BENDA TEGAR DAN FLUIDA TERHADAP PENCAPAIAN KOMPETENSI FISIKA PESERTA DIDIK KELAS XI SMAN 15 PADANG Selvi Febriani Erdi; Yulkifli Yulkifli; Murtiani Murtiani
PILLAR OF PHYSICS EDUCATION Vol 10 (2017)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.229 KB) | DOI: 10.24036/2569171074

Abstract

Achievement of the competence of learners on the subjects of physics showed less than optimal results because the learning model and teaching materials have not demanded the active role of learners in finding the concept. Physics learning requires instructional materials based on learning models that can increase the interaction of learners in a concept invention. The teaching materials in question are Student Work Sheets based on the Discovery Learning model. The purpose of this research is to investigate the influence of Student Work Sheets based on Discovery Learning model on the material of rotation of rigid bodies and fluids objects to the achievement of physics competence of students of class XI SMAN 15 Padang. This type of research is Quasi Experiment Research with Randomized Control Group Design Only Design. The population of the study were students of class XI SMAN 15 Padang registered in the academic year 2016/2017 with the sampling technique used was cluster random sampling. The experimental class is XI IPA 1 using Student Work Sheets based on Discovery Learning model and control class is XI IPA 5 using Student Work Sheets in the school. Assessment instruments used in attitudinal aspects through the assessment of observation, knowledge through written tests, and skills through performance appraisal. Research data were analyzed by two equality test equation using t test statistic and regression test and correlation to know the relation between independent variable and control variable. The mean value of the experimental class attitude aspect is 82,11 and the control class is 72,45. The average value of the experimental class knowledge aspect is 80,12 and the control class is 72,34. The average value of experimental class skill aspect is 79,21 and the control class is 66,33. The result of t test for attitude aspect is 3,1569, knowledge is 2,5605, and skill is 6,4236 show t count is outside acceptance area of Ho. It shows that the difference of mean value between the two sample classes has significance at the real level of 0,0500 with the value of t count > t table. Based on the regression and correlation test, the effect of Student Work Sheets based on the Discovery Learning model on the knowledge aspect is 21,19 %. So, it can be concluded that there is a significant effect on the use of Student Work Sheets based on the model of Discovery Learning toward the achievement of physics competence of students of class XI SMAN 15 Padang
PENGARUH PENGGUNAAN LKS BERORIENTASI PEMBELAJARAN COOPERATIVE LEARNING TIPE JIGSAW BERMUATAN NILAI KARAKTER TERHADAP HASIL BELAJAR FISIKA SISWA KELAS X SMAN 1 RAO PASAMAN Iwan Saputra; Yulkifli Yulkifli; Fatni Mufit
PILLAR OF PHYSICS EDUCATION Vol 5 (2015)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (417.951 KB) | DOI: 10.24036/1878171074

Abstract

This research is grounded by poor student’s learning outcomes in physic subject; many students have not reach KKM outcome in physic subject at school. The reason is students are not involved actively in learning process, and they are bored with current learning method. Interactions in learning are only one way. Poor student’s character in learning is because there is no subject that will guide transformation of student’s character. To deal with this problem, one of the efforts is using cooperative learning type jigsaw task book (LKS) with character value. The purpose of this research is to find out the effect of cooperative learning type jigsaw LKS with character value for student’s learning outcome of physic subject in X class SMAN 1 Rao Pasaman. The type research is “quasi experimental research” with “randomized posttest only control group” which population is students in nine classes of X class SMAN1 Rao Pasaman year of school 2013/2014. Sample was collected by cluster random sampling. Research data covered three domains that are cognitive, affective, and psychomotor. Research instruments are student’s grade, observation sheet of student’s affection and psychomotor. Data were analyzed by t-test. Based on data analysis, it showed that average cognitive domain in experimental classes was 82 and in control class were 77; average affection domain in experimental classes was 83.2 and in control class was 78.5; average psychomotor domain in experimental classes was 83 and in control class was 78.9. T-test in cognitive domain was thit = 3.57 and ttab = 2.00; T-test in affective domain was thit = 2.47 and ttab = 2.00; T-test in psychomotor domain was thit = 3.21 and ttab = 2.00. It means that those three domains have thit > ttab, so hypothesis is accepted in rate of 0.05. Conclusion this research is there is a significant effect of cooperative learning type jigsaw LKS with character value for student’s learning outcome of physic subject in X class SMAN 1 Rao Pasaman
PENGARUH PENERAPAN BAHAN AJAR BERMUATAN NILAI-NILAI KARAKTER DALAM MODEL PEMBELAJARAN SAVI TERHADAP KOMPETENSI FISIKA PESERTA DIDIK PADA MATERI MOMENTUM, IMPULS DAN GETARAN HARMONIS KELAS X MIPA SMAN 2 BUKITTINGGI Rifka Oktaviani; Yulkifli Yulkifli; Murtiani Murtiani
PILLAR OF PHYSICS EDUCATION Vol 10 (2017)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.67 KB) | DOI: 10.24036/2566171074

Abstract

Achievement of the competence of learners on the subject of physics is not in accordance with the expected because of the mastery of physics students are still less and not actively involved in the learning process. In addition, the learning model used is still not diverse and teaching materials that have not been incorporated. Therefore, the researcher uses instructional materials values in SAVI learning model (Somatic, Audio, Visual, Intellectual). This study aims to apply the concept of teaching and learning in the learning model SAVI (Somatic, Audio, Visual, Intellectual) to the physics competence of students of class X MIPA SMAN 2 Bukittinggi.The type of research conducted is Quasi Experimental Research with Random Group Design Group design. The study population is the X class students from MIPA SMAN 2 Bukittinggi registered in the academic year 2016/2017, as many as 6 classes. Sampling was done by Purposive Sampling technique. The sample in this research is class X MIPA 4 as experiment class and class X MIPA 2 as control class. The data of this study include three properties, namely knowledge, attitude and skills. Assessment tools for learning, attitude observation sheets for attitudes, and performance appraisals for skills competencies. The data obtained were analyzed using two equity test equations for all competencies, a simple linear regression test and a real test level of 0.05 for knowledge competence and experimental class.The results show the average. Then the average is higher than the control class 78.3. The average level of learning skill classes is 85.64 higher than the control class. From the results of data analysis can be concluded that the application of teaching materials with character value gives a significant influence on the physics competence of students of class X SMAN 2 Bukittinggi to the competence of knowledge, attitude and achievement at the real level of 0.05
Pengaruh Buku Ajar IPA Terpadu Tema Kesehatan Pencernaan dalam Model Pembelajaran Kontekstual Adaptif Terhadap Kompetensi Siswa Kelas VIII SMPN 15 Padang Rini Sarimayenti; Asrizal Asrizal; Yulkifli Yulkifli
PILLAR OF PHYSICS EDUCATION Vol 11, No 1 (2018)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (709.916 KB) | DOI: 10.24036/2711171074

Abstract

In 2013 curriculum, science teaching should be implemented in integrated  form in Junior High School. The real conditions show that integrated science teaching in school can’t implemented well. An alternative solution of this problem is to apply the integrated science textbook in adaptive contextual teaching model. The objective of this research was to investigate the effect of integrated science textbook on our digestive health theme in adaptive contextual teaching model toward the competences of the grade VIII students in  SMPN 15 Padang. The type of research was quasi experimental research with one group pretest-posttest design. Samples in this research were taken by using the purposive sampling technique. The research instruments consist of observation sheet for attitude competency, written test for knowledge competency and performance assessment for skill competency. Data of this research were analyzed by using descriptive statistical analysis and compare mean test for attitude, knowledge, and skill competences. The results of data analysis show that the implementation of integrated science textbook on our digestive health theme in adaptive contextual teaching model gives significant effect on the attitude, the knowledge and the skill competences at 95 % level confidence of grade VIII students in VIII SMPN 15 Padang.
Kontribusi Lembar Kerja Peserta Didik Berbantukan Model Scaffolding Problem Solving Pada Materi Teori Kinetik Gas dan Pemanasan Global Terhadap Kompetensi Fisika Di Kelas XI SMAN 1 Lubuk Alung Joviana Marshel; Ahmad Fauzi; Yulkifli Yulkifli
PILLAR OF PHYSICS EDUCATION Vol 8 (2016)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1002.675 KB) | DOI: 10.24036/2467171074

Abstract

Problem-solving competence of students in the competence of knowledge attitudes and skills in learning physics is not optimal. This is because the learners beloum understand and less interested in learning. besides learning the physics itself is too monotonous and lacking in appeal. thus, this research using model Scaffolding problem solving. Problem-solving skills can be improved through the use of learning problem solving. One of them Scaffolding Problem Solving. This type of quasi sampel research with the study design one shot case study. the entire study population of learners class XI SMAN 1 lubuk alung. sample taken by cluster sampling; so the result XI mia 2 was selected as the study sample class that has 33 students. This is a research instrument in the form of an essay writing test for competency knowledge. observation sheets, self-assessment and peer assessment to the competence of the scoring rubric for the attitude and competence skils. Data analysis using the test at level 3 competition. hasil 0.05 significantly all the research shows that using scaffolding model of problem solving there is a significant contribution to the competency learners
Fabrication of measuring tool for gear rotational speed using an inductive proximity sensor and an Arduino Uno microcontroller Elfi Susilawati; Yulkifli Yulkifli; Zulhendri Kamus
PILLAR OF PHYSICS Vol 10 (2017)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (849.405 KB) | DOI: 10.24036/2536171074

Abstract

The development of science and technology (Science and Technology) always improved. Science and technology proven to provide convenience and benefits for humans as in the field of Physics, for example measurement of the Rotational speed. Rotational speed can be measured in two ways: manually and automatically. Automatic sensor-assisted system used to detect and monitor the speed of play. Sensors for this system is inductive proximity sensors npn LJ12A3-4-Z / BX type. The use of these sensors has not been widely used in general, so the design and realization of the system is done looking at technical data, specifications and sensor characteristics. The objective of the research is to know the performance specification and the design of the gear speed measuring instrument. This research is engineering research. Data collection is done directly and indirectly. Direct measurements are made by comparing the measurements and theoretical outcomes. Indirect measurements determine the precision and accuracy of the speed. The data obtained through measurement are statistically and graphically. Based on data analysis put forward two important sections. First, the measurement system performance specification using proximity sensor and arduino microcontroller UNO consist of DC motor there are 12 gear, near DC motor there is proximity sensor with 4 mm distance to gear, and box circuit. Design specifications of measuring instruments in the form of device sensitivity 8,015; Relative accuracy 0.97; 97% accuracy and 0.99 system accuracy
Co-Authors Ahmad Fauzi Asrizal Djusmaini Djamas Elfi Susilawati Even Triaga Fanny Rahmatina Rahim Fatni Mufit Festiyed Hufri Hufri Iwan Saputra Joviana Marshel Melvi Sofia Mitra Djamal Mona Berlian Sari Murtiani Murtiani Nofsi Meiza Novella Febriana Nurul Ihsan R. N. Setiadi Ratnawulan . Rifka Oktaviani Rini Sarimayenti Selvi Febriani Erdi Yohandri Zulhendri Kamus