Pengembangan Instrumen untuk Mengukur Kemampuan Representasi dan Komunikasi Matematis Siswa dalam Aspek Fonetik Materi Geometri SMP

This research aimed to develop valid and appropriate test instruments to measura phonetical aspects of students' mathaematical representation and communication in material about area and circumference of a circle. This research utilised formative research and development. The subjects of this study are tehe eight (VIII) grade students of SMP 9 Pontianak, during 2016/2017 academic year. There were 37 participants. The research found thet: (1) needs analusis found thar the teacher require to have test instruments that are suitable eith KTSP (education unit curriculum) due to differences between the old and test instruments that are being developed; (2) the validity of the test instruments about phonetical aspect of mathematic representation and communication of the aforementioned topic was 70%, reliability was 93%, distinguishing power was 32%, difficulty level was 32%, which can be categorized good; (3) in a 1-4 scoring scale, the students' mathematical representation result showed thar, on average, top category students are 4, medium category students are3 and the bottom categorized students are 1

Pemanfaatan Cangkang Telur Ayam Sebagai Adsorben Untuk Meningkatkan Kualitas Minyak Jelantah

- Chicken egg shells produced in Samarinda in 2013, as much as 307.22 tons and mostly just dumped it into the trash. In this study, the shell activated and then used as an adsorbent for reducing the acid value and peroxide value on frying oil. Frying oil adsorption process was done by varying the mass of adsorbent that is 7, 8, 9 and 10 gram and time stirring for 45, 60 and 75 minutes. The research showed the optimum conditions for a decrease in acid number on the use of adsorbent mass of 9 grams and the time of stirring for 60 minutes to produce the acid value of 0.3923 mgKOH / g with a decrease in acid number of 91%, while for the peroxide value decreased by 58% with a value of 7.516 meq O2/kg. Numbers acid and peroxide obtained at the optimum condition has met the SNI 3741-2013 standards for edible oil is 0.6 mgKOH / g and 10 meq O2/k

Kemampuan Representasi Matematis Luas dan Keliling Lingkaran Berdasarkan Teori Bruner di SMPN 9 Pontianak

This study is aimed to determine the ability and factors that caused the mathematical representation according to students' competence level in solving problems of area and perimeter of a circle. The method used was descriptive research in case study design. The subjects of research were students of grade VIIIA of SMPN 9 Pontianak. The results showed that the factors that caused low capacity of representation as follows: (1) Student who had a high competency level in enactive representation is caused by low of reasoning; the iconic representation is caused by difficulties in connection, while the symbolic representation is caused by a low conceptual understanding. (2) Student who had an intermediate competency level in enactive representation is caused by low of reasoning; the iconic representation is caused by low of reasoning, while the symbolic representation is caused by a low conceptual understanding. (3) Student who had a low competency level in enactive representation is caused by procedural disfluencies, the iconic representation is caused by the misconceptions, while the symbolic representation due to weak memory

Studi Komparasi Hasil Belajar Kimia Pada Materi Koloid Menggunakan Model Pembelajaran Berbasis Proyek Dan Model Pembelajaran Berbasis Masalah Siswa Kelas XI IPA Man 2 Mataram Tahun Ajaran 2013/2014

: The aims of this quasi experimental research is to compare the chemistry study result by using the project based learning model and problem based learning model at class XI science of MAN 2 Mataram in academic year 2013/2014. Sample of this research were class XI science U1 as experiment I class and class XI science U2 as experiment II class which taken by using purposive sampling technique.Data cognitive of the result study obtained through a written test (post-test) were analyzed using a different test (t test). The results showed that the experimental class I obtained an average value of 67 with classical completeness of 7.69% while the experimental class II obtained an average value of 70 with classical completeness 28.57%. T-test results of the unequal sample at the significant level of 5% was obtained tcalculation =-0,4709 andttable= 2,060, with the result that tcalculationin the range from to -2,060 and +2,060which means that the Ho in this research is approved. In conclusion, there is no significant difference in result study between students who are taught chemistry using project-based learning model and the problem based learning model students of class XI IPA 2 Mataram MAN in Academic Year 2013/2014

Pengembangan Buku Pengayaan Menulis Teks Eksposisi Berbasis Gerakan Antinarkoba

Tujuan penelitian ini adalah mengembangkan buku pengayaan menulis teks eksposisi berbasis gerakan antinarkoba. Buku pengayaan yang disajikan memiliki andil dalam proses pembelajaran terutama sebagai bahan bacaan bagi siswa. Dalam buku pengayaanmenulis teks eksposisi perlu diintegrasikangerakan antinarkoba.Penelitian ini menggunakan pendekatan dan metode Research and Development (R&D) yang dilakukan dalam lima tahap. Hasil penelitian menerangkan kecenderungan kebutuhan yang diajukan guru dan siswa.Ide tersebut disusun dalam bentuk prinsip-prinsip pengembangan buku pengayaanmenulis teks eksposisi berbasis gerakan antinarkoba.Prototipe buku pengayaan menulis teks eksposisi berbasis gerakan antinarkoba mencakup tiga bagian, yakni bagian awal, bagian isi, dan bagian penutup.Bedasarkan uji validasi, dosen ahli memberi nilai dengan katagori sangat baik terhadap buku pengayaan menulis teks eksposisi berbasis gerakan antinarkoba.Selain itu, buku pengayaan tersebut dapat digunakan sebagai sarana pembelajaran materi teks eksposisi. Kata kunci: buku pengayaan, menulis teks eksposisi, dan antinarkoba.   Abstrack                The purpose of this research is to develop an enrichment text writing exposition book based on the anti-drug movement. The enrichment book presented has a share to the learning process, especially as a reading material for students. In the enrichment book exposition text writing is integrated with the anti-drug movement. This research uses approach and method of Research and Development (R&D) which had been done in five stages. The results explained the tendency of the proposed needs of teachers and students. The idea is structured in the form of principles of developing text writing exposition enrichment books containing the anti-drug movements. Based on the principle, a prototype of the book includes three parts, namely the beginning, the contents, and the cover. The results of the expert's assessment, the enrichment book provides a good and worthy assessment as a teaching material. Based on the expert lecturer validation test, it gives a very good category to the enrichment text writing exposition book based on the anti-drug movement. In addition, the enrichment book can be used as a means of learning exposition text material. Keywords: enrichment book, write exposition text, anti-drug

Rancang Bangun Sistem Informasi Penerimaan Siswa Baru Berbasis Web (Studi Kasus: Smk Otomotif Waskita Tangerang)

Teknologi informasi sekarang ini telah berkembang pesat bahkan dunia pendidikan tak luput dari sentuhannya, hal ini dibuktikan dengan banyaknya sekolah mulai mengoptimalkan website untuk menyajikan informasi secara online, tetapi sekarang ini masih banyak penerimaan siswa baru dilaksanakan secara manual. Salah satu yang menjadi masalah dalam penerimaan siswa tersebut adalah membutuhkan waktu dan tenaga extra bagi panitia dalam penerimaan siswa baru. Tujuan dari penelitian ini adalah mempermudah penerimaan siswa baru dimanapun dan kapanpun secara online. Bahasa pemrograman PHP, database MySQL dan framework CodeIgniter digunakan dalam pembuatan aplikasi sistem informasi penerimaan siswa baru berbasis web pada SMK OTOMOTIF WASKITA TANGERANG. Hasil dari pembuatan aplikasi sistem penerimaan siswa baru pada SMK OTOMOTIF WASKITA TANGERANG adalah penerimaan siswa baru secara online, pembayaran secara online, dan pembuatan laporan penerimaan secara online. Dengan terciptanya aplikasi ini semoga bermanfaat terhadap siswa dan membantu terhadap guru / panitia yang mengajar pada SMK OTOMOTIF WASKITA TANGERANG

Analisis Deformasi Akibat Aktivitas Vulkanik Menggunakan Data Citra Sentinel-1A dan Metode DInSAR Three-pass Interferometry (Studi Kasus : Gunung Semeru, Jawa Timur)

Gunung Semeru merupakan salah satu gunung api yang secara administratif masuk kedalam Wilayah Kabupaten Lumajang dan Malang, Jawa Timur. Dikutip dari Press Release Aktivitas Gunung Semeru oleh kementerian ESDM, Gunung Semeru menunjukkan aktivitas vulkanik berupa semburan awan panas hingga 2 Km dari puncak pada Jumat, 17 April 2020 pukul 06.08 WIB dan gempa guguran dengan amplitudo maksimum 7 mm dan lama gempa 300 detik. Adanya aktivitas magma gunung api berupa uplift sebelum aktivitas vulkanik dan subsidence saat aktivitas vulkanik dapat menyebabkan terjadinya deformasi permukaan gunung api. Pada penelitian ini, pengamatan fenomena deformasi dilakukan menggunakan metode DInSAR (Differential Interferometry Synthetic Aperture Radar) three-pass interferometry yang memanfaatkan pasangan citra SAR Sentinel 1-A yang diakuisisi pada waktu dan posisi yang berbeda, dimana data Fase topografi dan penggepengan diperoleh dari pasangan citra SAR 1 dan 2 dengan selisih temporal yang saling berdekatan dan tidak memiiki unsur subsidence. Selanjutnya data Fase tersebut digunakan dalam proses koreksi topografi dan flattening pasangan citra SAR 1 dan 3 untuk memperoleh nilai deformasi. Pengamatan deformasi menggunakan metode DInSAR three-pass interferometry menunjukkan adanya fenomena deflasi atau penurunan permukaan tanah dengan rata-rata -26,14442279 milimeter yang direpresentasikan dari 92 titik sampel di seluruh area Gunung Semeru, dimana pada area jalur aliran lava (timur, tenggara, selatan, dan barat daya) mengalami deflasi yang lebih besar dibanding dengan area yang lain (barat, barat laut, utara, dan timur laut). Hasil deformasi dari metode ini memiliki hubungan korelasi yang kuat dengan hasil deformasi data pembanding two-pass interferometry dan SBAS, yaitu 0,525889 dan 0,704151