Dasar Pemodelan dan Navigasi Flocking Mobile Robot dengan Aplikasi Sensor Jarak

Abstract—The main concept of flocking mobile robot is one robot leader followed by other robots, this concept was inspired by nature, flocking of birds, swarms of bees etc. This research objective is to investigate the possibility of applying distance sensors modeled as virtual spring-damper in navigating flocking robot within leader-follower robot system. Distance sensors installed at follower robots in order to maintain certain distance to leader robot and by the time leader robot stop so will the follower robots. This research started by modeling the system in virtual spring-damper system, simulating the effectiveness of proposed method in MATLAB/Simulink and finally applying the method in to real mobile robot system. Simulation results shows that follower robots follow leader robot in certain fixed distance and the velocities output of leader robot and follower robots are also the same, meaning that the robots within the system maintain their initial formation; train formation or wedge formation. The simulation results also shows that modeling distance sensor as virtual spring damper is an effective method for navigating the flocking robot system, moreover stable spring-damper system will ensure the system stability. Simulation results successfully applied to real system consist of one leader robot and one follower robot.  Index Term—flocking robot, robot leader, robot follower, sensor jarak dan virtual spring-dampe

PENERAPAN MODEL COOPERATIVE LEARNING TIPE JIGSAW UNTUK MENINGKATKAN KEMAMPUAN DISKUSI SISWA PADA MATA PELAJARAN MATEMATIKA MATERI BANGUN RUANG

Penelitian ini bertujuan untuk meningkatkan proses pembelajaran pada pelajaran matematika dan meningkatkan kemampuan diskusi siswa kelas IV SDN 1 Suntejaya, Lembang melalui model cooperative learning tipe Jigsaw. Model cooperative learning tipe Jigsaw dipilih karena dapat memacu dan mendorong siswa untuk mampu mengajukan pertanyaan serta memberikan pendapatnya dalam kegiatan berdiskusi. Subjek penelitian ini adalah siswa kelas IV SDN 1 Suntejaya, Lembang. Penelitian difokuskan pada permasalahan yang berkaitan dengan masih rendahnya kemampuan diskusi siswa dalam kegiatan diskusi kelompok, siswa cenderung diam dan belum mampu mengajukan pertanyaan dari materi yang sedang dibahas, belum mampu memberikan pendapat dari materi ataupun pernyataan yang dipaparkan oleh guru dan siswa lainnya dan kurang bervariasinya penggunaan model pembelajaran dalam pelajaran matematika khususnya dalam kegiatan diskusi kelompok. Data dalam penelitian ini diperoleh melalui observasi, catatan lapangan, hasil penilaian diskusi dan dokumentasi. Data dianalisis dengan teknik deskriptif kualitatif. Hasil penelitian yang diperoleh yaitu presentase ketercapaian indikator kemampuan diskusi mengalami peningkatan dalam setiap siklusnya. Kemampuan rata – rata siswa dalam berdiskusi sebelum adanya implementasi tindakan berkategori kurang. Namun, setelah adanya implementasi tindakan dalam dua siklus, kemampuan rata – rata siswa dalam berdiskusi menjadi berkategori baik sekali. Hasil penelitian menunjukan : (1) secara proses, pembelajaran matematika dengan menggunakan model cooperative learning tipe Jigsaw berjalan baik dan proses diskusi pun mengalami peningkatan yang cukup signifikan. Siswa sudah mampu menerapkan dengan baik langkah – langkah pembelajaran tersebut dalam kegiatan diskusi kelompok dan sudah mampu berdiskusi baik dengan kelompok ahli maupun dengan kelompok asal; (2) secara produk, siswa dalam berdiskusi pada saat pra sikus dengan skor rata – rata 7,6 dan pada akhir pelaksanaan tindakan yaitu siklus II menjadi 13,03. Kemampuan siswa dalam berdiskusi mengalami peningkatan sebesar 5,43. This study aims to improve learning process in Math subject and discussion ability of fourth grade students in SDN 1 Suntejaya, Lembang using jigsaw type of cooperative learning. It intends to stimulate and support students to be able to asking a question and giving their opinions in discussion activity. The fourth grade students in SDN 1 Suntejaya, Lembang are participants of this research. The study focuses on the problem related to the low of students’ discussion ability in group discussion activity, unproductive and incapable of the students’ ability in asking a question and giving opinions either from learning materials discussed or statements uttered by teacher and other students and the less varied of learning model in Math subject especially in group discussion. The research data is gained through observation, fieldnotes, discussion assessment result, and documentation. The data employs descriptive qualitative technique. The findings indicate that the indicator’s percentage in discussion ability achievement increased eventually in every cycle. The average of students’ discussion ability before the implementation is claimed to be low. However, after the implementation in two cycles, their ability in discussion increases into very good categorization. The results show that: (1) In process, learning Math using Jigsaw type of cooperative learning run well and the process of discussion also increase significantly. The students excellently have been able to implement the learning sequences in group discussion and discuss either with skilled group or own group; (2) in product, students’ discussion ability in pre-implementation is about 7, 6. Then it increased into 13, 03 in the II cycle. In summary, Students’ ability in discussion has increased about 5.43

ANALISIS ALAT PENILAIAN PEMBELAJARAN UJIAN AKHIR SEMESTER MATA PELAJARAN PRODUKTIF KEAHLIAN KELAS X TATA BOGA DI SMK SHANDY PUTRA BANDUNG

Alat penilaian ujian akhir semester di SMK Shandy Putra Bandung tidak dilakukan pengujian alat penilaian dari segi empirik. Penelitian ini bertujuan untuk mengukur tingkat kesukaran, daya beda, efektifitas pengecoh, dan reliabilitas soal ujian akhir semester tahun ajaran 2012-2013 pada mata pelajaran produktif keahlian kelas X Tata Boga. Populasi sebanyak 40 butir soal, semuanya dianalisis yang terdiri dari 69 lembar jawaban siswa. Metode penelitian dengan menggunakan metode deskriptif dimana tidak adanya perlakuan terhadap variabel, hanya menjelaskan hasil penelitian dengan apa adanya. Hasil analisis kuantitatif seluruh butir soal menunjukkan bahwa, tingkat kesukaran soal dengan kriteria sukar 25% , sedang 10% dan mudah 65%. Daya beda, dengan kriteria baik 5%, cukup baik 42,5%, jelek 37,5% dan sangat jelek 15%. Efektifitas pengecoh, tidak berfungsi dengan baik 84%, dan pengecoh berfungsi dengan baik 16%. Reliabilitas sebesar 0,413 artinya soal memiliki keajegan yang sedang. Berdasarkan hasil penelitian disimpulkan bahwa soal memiliki Tingkat Kesukaran sedang dengan rata-rata (mean p) 0,652 , Daya Beda jelek dengan rata-rata (mean tot) 0,198, Efektifitas Pengecoh kurang berfungsi serta Reliabilitas (alpha) sedang dengan nilai 0,413

Pengaruh Keterlibatan Orangtua Terhadap Perilaku Sosial Emosinal Anak

Penelitian ini bertujuan untuk memperoleh informasi tentang pengaruh keterlibatan orang tua dalam bidang pendidikan terhadap perilaku sosial emosional anak usia 5-6 tahun di Kecamatan Cipicung. Penelitian ini merupakan penelitian kuantitatif dengan jenis penelitian Ex Post Facto. Populasi dalam penelitian ini adalah orang tua dan anak usia 5-6 tahun di Taman Kanak-kanak Kecamatan Cipicung dengan sampel yang diambil dari seluruh populasi. Data dikumpulkan melalui angket dan observasi. Analisis menggunakan analisis regresi dengan bantuan SPSS 21.0 for Windows dengan taraf signifikansi 0,05. Hasil penelitian menunjukan bahwa terdapat pengaruh signifikan keterlibatan orangtua terhadap perilaku sosial emosional anak usia 5-6 tahun dengan nilai Sig 0,05 dengan koefisien determinasi sebesar 54.3 % dan sisanya dipengaruhi oleh faktor lain

Uji Daya Hambat Tanaman Herbal Berpotensi sebagai Antimikroba Alami

Mikroorganisme patogen seperti bakteri yang bersifat pathogen dapat menyebabkan infeksi pada manusia. Upaya pengendalian aktivitas mikroorganisme seperti bakteri umumnya dilakukan dengan menggunakan senyawa antimikroba/antibiotik dan antiseptik  yang  berasal  dari  bahan-bahan kimia  sintetik. Antibiotik merupakan senyawa kimia yang diproduksi oleh suatu organisme dalam jumlah yang sedikit dan dapat menghambat proses biokimia suatu organisme. Kandungan senyawa aktif dalam tanaman dapat berpotensi sebagai antimikroba atau antibakteri alami Pemanfaatan bahan alam tanaman herbal sebagai antibiotik alami dapat digunakan sebagai salah satu alternatif. Daya hambat suatu antibiotik terhadap bakteri dalam kondisi yang sesuai dapat diketahui dengan metode assei mikrobiologi. Metode yang biasanya digunakan dalam metode assei mikrobiologi yaitu metode kertas saring (Kirby and Bauer) dan metode d`Aubert.   Kata Kunci: bakteri, daya hambat, antibiotik, tanaman herbal, antimikroba alam

PELATIHAN PENULISAN KARYA TULIS ILMIAH KELOMPOK IPA DAN IPS SMAN 6 PALEMBANG

Scientific writing is a scientific means of communication that uses systematics appropriate to the scientific community through an accepted writing system where scientific features of a scientific paper are empirical and objective to be regarded. However, not all students have the capacity to do so, hence the need for science writing instruction for students. The activities of the Community Service Team, consisting of 3 lecturers and 3 students of the Electrical Engineering Department of Politeknik Negeri Sriwijaya, are to enrich students to write appropriate scientific papers in compliance with the guidelines for writing. The presentation/discussion, assessment, and mentoring of this activity have been carried out in conjunction with the stated targets. Students' high motivation is shown by the assistance and assessment of the titles and writings offered by the Community Service Team

Object Following Design for a Mobile Robot using Neural Network

Deciding the best method for robot navigation is the most important tasks in mobile robot design, defined as the robot's ability to reach the target or/and move around its environment safely using the installed sensors and/or predefined map. To achieve this objective, wall or object detection can be considered. It is common to derive kinematics and dynamics to design the controls system of the robot, however by giving intelligence system to the robot, the control system will provide better performance for robot navigation. One of the most applied artificial intelligence is neural networks, a good approach for sensors of mobile robot system that is difficult to be modeled with an accurate mathematical equations. Mostly discussed basic navigation of a mobile robot is wall following. Wall following robot has been used for many application not only in industrial as a transport robot but also in domestic or hospital. Two behaviors are designed in this paper, wall following and object following. Object following behavior is developed from wall following by utilizing data from 4 installed distance sensors. The leader robot as the target for the follower robot, therefore the follower robot will keep on trying reaching for the leader in a safe distance. The novelty of this research is in the sense of the simplicity of proposed method. The feasibility of our proposed design is proven by simulation where all the results shows the effectiveness of the proposed method

The impact of Nodes Distance on Wireless Energy Transfer System

Wireless energy transfer (WET) reemerges as the method for transmitting electric power without the necessity to deal with cable losses and an aesthetically pleasing environment. The problem with WET is how to maintain magnetic induction as the distance gets further. This paper investigates the impact of nodes distance on the WET system. The experimental results show that the most effective distance among transmitter, nodes, and receiver are 4 cm. The measurement is taken with and without load. The without load application give that for node 1; the results are 6 V, 110 mA, and 2.85 mT for voltage, current, and magnetic flux, respectively. At the application of 2 nodes, the voltage is 6.8 V, the current is 0.124 mA, and the magnetic flux is 3.83 mT, and at three nodes installation, it is 7 V, 134 mA, and 3.83 mT. During the application of 3-Watt and 5-Watt lamp, at 4 cm distance, the power received is 1.66 W and 3.66 W at 3-Watt and 5-Watt lamp for one node, 1.84 W, and 3.84 for two nodes, and 1.93 W and 3.93 for three nodes. The experimental results show that the transmitted signal can be prolonged by installing nodes. Even though this study shows that 4 cm is the most effective, it is possible to increase up to 20 cm to power a 3-Watt lamp and 5-Watt lamp

Implementasi Fuzzy Logic Controller Pada Kendali Kecepatan Sepeda Bertenaga Angin

One alternative for environmentally friendly vehicles is wind-powered bikes. This vehicle can reduce air pollution and can be convenient in big cities. The proposed bike is equipped with a distance sensor to sense the safe proximity to nearby obstacles. If the obstacles are below a reasonable distance, the mounted buzzer is active as the warning. This bike uses the wind generated by the 8045 hp dc rotation. The pulse-width (PWM) modulation is used to control a dc engine rotational speed with a fixed value of 155 = low and 255 = high. Fuzzy Logic Controller is used to increasing system effectivity to processes the input from the proximity sensor. The sufficient distance between the bike and the obstacles ahead, right and left, is set to be 1 meter. The PID controller ensures that the dc motor rotations are smooth and steady to ensure that the PWM value is still positive. In order to maintain a stable state Kp = 60, Ki = 4.2, and Kd = 2.9 are set as the appropriate settings for the used PID constants

Hubungan Kompetensi Pedagogik dengan Kinerja Mengajar Guru di Kecamatan Japara Kabupaten Kuningan

Penelitian ini bertujuan untuk memperoleh informasi tentang hubungan kompetensi pedagogi dengan kinerja mengajar guru PAUD di kecamatan japara kabupaten kuningan. Metode yang di gunakan adalah kuantitatif korelasional. Teknik pengumpulan data dalam penelitian ini menggunakan angket dan dokumentasi. Sampel dalam penelitian ini menggunakan sampling jenuh yaitu 23 guru TK. Analisis data dalam penelitian ini menggunakan uji korelasi Pearson. Hasil penelitian menunjukkan bahwa terdapat hubungan antara kompetensi pedagogik guru dengan kinerja mengajar guru tk di kecamatan japara kabupaten kuningan di buktikan dengan nilai sig 0,000 lebih kecil dari 0,05.kompetensi pedagogik guru di kecamatan japara kabupaten kuningan termasuk ke dalam kategori tinggi yaitu sebesar 56,52% yaitu13guru dari total sampel 23 guru. Kinerja mengajar guru di kecamatan Japara kabupaten kuningan termasuk ke dalam kategori tinggi yaitu sebesar 52,17% yaitu 12 guru dari total sampel 23