Atika Sadariah nasution - Academia.edu (original) (raw)

Uploads

Papers by Atika Sadariah nasution

Research paper thumbnail of Teknik Penyembunyian Citra Digital Pada File Video Dengan Metode End Of File

Along with more and more use of digital image then the process a digital image processing is also... more Along with more and more use of digital image then the process a digital image processing is also growing. One method of digital image processing is watermaking. Watermaking is a form of steganography that is used to store a digital image into digital data or vice versa. One of the watermarking method that can be used to hide the digital image into a digital video is the method of the End Of File (EOF). Method End Of File (EOF) is one technique that inserts the data at the end of the file. End Of File using the redundant bits as a place to hide a message at the time of the compression of data, and then use the weaknesses of human senses that are not sensitive so as if there is no visible difference between before or after the message is inserted. Software designed to insert an image file in BMP or JPG format into a digital video with AVI format and inserts the result can only be displayed using software designed. Universitas Sumatera Utara

Research paper thumbnail of Changes in the electronic structure upon the B2-B19 ' martensitic transformation in titanium-nickel

Physics of the Solid State, 2001

ABSTRACT The self-consistent band structure of a TiNi intermetallic compound in two phases is cal... more ABSTRACT The self-consistent band structure of a TiNi intermetallic compound in two phases is calculated by the full-potential linearized augmented-plane-wave (FLAPW) method. The features of changes in the density of states upon B2–B19′ martensitic transformation are discussed. The influence of atomic positions on the electronic structure of the martensitic monoclinic phase is examined. The frequency dependence of the optical conductivity and the emission, absorption, and the characteristic electron-energy-loss spectra are calculated with due regard for the transition probability matrix element. The results of calculations are in reasonable agreement with the available experimental data.

Research paper thumbnail of Development of Assessment Instruments Based on High-Level Thinking Skills in the Receptive Language Skills Course for Unimed Indonesian Language and Literature Education Students

Advances in Social Science, Education and Humanities Research, 2021

Development of an instrument based on the assessment of higher-order thinking skills in the form ... more Development of an instrument based on the assessment of higher-order thinking skills in the form of an instrument that is prepared based on the needs of students of the Indonesian Language and Literature Education Study Program, Unimed. The purpose of this research is to produce an instrument based on higher order thinking skills, especially in the Receptive Skills subject that is valid, effective, and of good quality used in learning. This research is a development research (R and D) with a Brog and Gall development model that has been adapted to research needs. The data collection instrument used a questionnaire to analyze the needs of students and lecturers, validation of the evaluation and materials, analysis of the effectiveness of the assessment instrument through a responsive questionnaire of students and lecturers. Based on the results of the study that the results of the evaluation of the feasibility obtained from multiple choice questions were 88.75% and the assessment obtained was 87.75% with very valid criteria and deserved to be tested. Expert results on the right material and language in multiple choice obtained a score of 87.75% and an explanation of the score 84.38% has valid criteria and deserves to be tested. Based on the analysis of the effectiveness of the assessment instrument, the two achievements reached 90.27% and the ten students obtained 86.42%, meaning that this assessment instrument was effective. Results Based on research on the effectiveness of the instrument for assessing higher order thinking skills in the Receptive Language Skills course in the Indonesian Language and Literature Education Study Program, it is said to be good and worthy as a learning reference

Research paper thumbnail of Analisis Kesesuaian Materi Pada Buku Teks Bahasa Indonesia Dengan Kompetensi Dasar Pada Silabus Bahasa Indonesia Kelas VII SMP Kurikulum 2013 (Edisi Revisi)

Kode: Jurnal Bahasa, Oct 3, 2018

Penelitian ini bertujuan untuk mengetahui kesesuaian materi pada buku teks bahasa Indonesia denga... more Penelitian ini bertujuan untuk mengetahui kesesuaian materi pada buku teks bahasa Indonesia dengan Kompetensi Dasar pada silabus bahasa Indonesia kelas VII SMP kurikulum 2013 (edisi revisi) dengan indikator penilaian pada aspek relevansi, konsistensi, dan kecukupuan materi. Objek penelitian ini adalah silabus kelas VII SMP dan buku teks bahasa Indonesia kelas VII SMP Kurikulum 2013 (edisi revisi). Instrumen penelitian ini adalah lembar penilaian kesesuaian materi dengan Kompetensi Dasar pada silabus berdasarkan aspek relevansi, konsistensi, dan kecukupan. Hasil analisis kesesuaian materi pada buku teks bahasa Indonesia dengan Kompetensi Dasar secara keseluruhan skor indikator penilaian pada aspek relevansi 91,66% termasuk kriteria sangat baik, aspek konsistensi 86,9% dan 96,42% termasuk kriteria sangat baik, dan pada aspek kecukupan termasuk kriteria sangat baik 96,42% termasuk kriteria sangat baik dan 96,42% termasuk kriteria sangat baik. Artinya, kesesuaian materi pada buku teks bahasa Indonesia dengan Kompetensi Dasar pada silabus kelas VII SMP kurikulum 2013 (edisi revisi) berdasarkan aspek relevansi, konsistensi, dan kecukupan termasuk dalam kriteria sangat baik. Maka dapat disimpulkan bahwa buku teks bahasa Indonesia kelas VII SMP Kurikulum 2013 yang diterbitkan oleh Kementrian Pendidikan dan Kebudayaan sangat baik dan dapat dijadikan sebagai bahan ajar dalam kegiatan belajar mengajar di sekolah.

Research paper thumbnail of Teknik Penyembunyian Citra Digital Pada File Video Dengan Metode End Of File

Along with more and more use of digital image then the process a digital image processing is also... more Along with more and more use of digital image then the process a digital image processing is also growing. One method of digital image processing is watermaking. Watermaking is a form of steganography that is used to store a digital image into digital data or vice versa. One of the watermarking method that can be used to hide the digital image into a digital video is the method of the End Of File (EOF). Method End Of File (EOF) is one technique that inserts the data at the end of the file. End Of File using the redundant bits as a place to hide a message at the time of the compression of data, and then use the weaknesses of human senses that are not sensitive so as if there is no visible difference between before or after the message is inserted. Software designed to insert an image file in BMP or JPG format into a digital video with AVI format and inserts the result can only be displayed using software designed. Universitas Sumatera Utara

Research paper thumbnail of Changes in the electronic structure upon the B2-B19 ' martensitic transformation in titanium-nickel

Physics of the Solid State, 2001

ABSTRACT The self-consistent band structure of a TiNi intermetallic compound in two phases is cal... more ABSTRACT The self-consistent band structure of a TiNi intermetallic compound in two phases is calculated by the full-potential linearized augmented-plane-wave (FLAPW) method. The features of changes in the density of states upon B2–B19′ martensitic transformation are discussed. The influence of atomic positions on the electronic structure of the martensitic monoclinic phase is examined. The frequency dependence of the optical conductivity and the emission, absorption, and the characteristic electron-energy-loss spectra are calculated with due regard for the transition probability matrix element. The results of calculations are in reasonable agreement with the available experimental data.

Research paper thumbnail of Development of Assessment Instruments Based on High-Level Thinking Skills in the Receptive Language Skills Course for Unimed Indonesian Language and Literature Education Students

Advances in Social Science, Education and Humanities Research, 2021

Development of an instrument based on the assessment of higher-order thinking skills in the form ... more Development of an instrument based on the assessment of higher-order thinking skills in the form of an instrument that is prepared based on the needs of students of the Indonesian Language and Literature Education Study Program, Unimed. The purpose of this research is to produce an instrument based on higher order thinking skills, especially in the Receptive Skills subject that is valid, effective, and of good quality used in learning. This research is a development research (R and D) with a Brog and Gall development model that has been adapted to research needs. The data collection instrument used a questionnaire to analyze the needs of students and lecturers, validation of the evaluation and materials, analysis of the effectiveness of the assessment instrument through a responsive questionnaire of students and lecturers. Based on the results of the study that the results of the evaluation of the feasibility obtained from multiple choice questions were 88.75% and the assessment obtained was 87.75% with very valid criteria and deserved to be tested. Expert results on the right material and language in multiple choice obtained a score of 87.75% and an explanation of the score 84.38% has valid criteria and deserves to be tested. Based on the analysis of the effectiveness of the assessment instrument, the two achievements reached 90.27% and the ten students obtained 86.42%, meaning that this assessment instrument was effective. Results Based on research on the effectiveness of the instrument for assessing higher order thinking skills in the Receptive Language Skills course in the Indonesian Language and Literature Education Study Program, it is said to be good and worthy as a learning reference

Research paper thumbnail of Analisis Kesesuaian Materi Pada Buku Teks Bahasa Indonesia Dengan Kompetensi Dasar Pada Silabus Bahasa Indonesia Kelas VII SMP Kurikulum 2013 (Edisi Revisi)

Kode: Jurnal Bahasa, Oct 3, 2018

Penelitian ini bertujuan untuk mengetahui kesesuaian materi pada buku teks bahasa Indonesia denga... more Penelitian ini bertujuan untuk mengetahui kesesuaian materi pada buku teks bahasa Indonesia dengan Kompetensi Dasar pada silabus bahasa Indonesia kelas VII SMP kurikulum 2013 (edisi revisi) dengan indikator penilaian pada aspek relevansi, konsistensi, dan kecukupuan materi. Objek penelitian ini adalah silabus kelas VII SMP dan buku teks bahasa Indonesia kelas VII SMP Kurikulum 2013 (edisi revisi). Instrumen penelitian ini adalah lembar penilaian kesesuaian materi dengan Kompetensi Dasar pada silabus berdasarkan aspek relevansi, konsistensi, dan kecukupan. Hasil analisis kesesuaian materi pada buku teks bahasa Indonesia dengan Kompetensi Dasar secara keseluruhan skor indikator penilaian pada aspek relevansi 91,66% termasuk kriteria sangat baik, aspek konsistensi 86,9% dan 96,42% termasuk kriteria sangat baik, dan pada aspek kecukupan termasuk kriteria sangat baik 96,42% termasuk kriteria sangat baik dan 96,42% termasuk kriteria sangat baik. Artinya, kesesuaian materi pada buku teks bahasa Indonesia dengan Kompetensi Dasar pada silabus kelas VII SMP kurikulum 2013 (edisi revisi) berdasarkan aspek relevansi, konsistensi, dan kecukupan termasuk dalam kriteria sangat baik. Maka dapat disimpulkan bahwa buku teks bahasa Indonesia kelas VII SMP Kurikulum 2013 yang diterbitkan oleh Kementrian Pendidikan dan Kebudayaan sangat baik dan dapat dijadikan sebagai bahan ajar dalam kegiatan belajar mengajar di sekolah.