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Scientific Journal of Informatics
Published by Universitas Negeri Semarang
ISSN : 24077658     EISSN : 24600040     DOI : -
Core Subject : Science,
Computer Science & IT
Scientific Journal of Informatics published by the Department of Computer Science, Semarang State University, a scientific journal of Information Systems and Information Technology which includes scholarly writings on pure research and applied research in the field of information systems and information technology as well as a review-general review of the development of the theory, methods, and related applied sciences.
Arjuna Subject : -
Articles 564 Documents
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PENGEMBANGAN LMS (LEARNING MANAGEMENT SYSTEM) BERBASIS WEB UNTUK MENGUKUR PEMAHAMAN KONSEP DAN KARAKTER SISWA Wibowo, Agung Tri; Akhlis, Isa; Nugroho, Sunyoto Eko
Scientific Journal of Informatics Vol 1, No 2 (2014): November 2014
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v1i2.4019

Abstract

Perkembangan teknologi informasi telah berkembang pesat dalam bidang pendidikan dengan lahirnya e-learning. E-learning dapat membantu guru dalam memantau keaktifan siswa dengan penugasan, forum diskusi maupun aktivitas lain, sehingga karakter dapat dideskripsikan melalui e-learning. Tujuan dari penelitian ini adalah mengembangkan Software Learning Management System (LMS). LMS adalah aplikasi perangkat lunak untuk kegiatan online, program pembelajaran elektronik (e-learning program) dan isi pelatihan. Selain itu, penelitian ini juga menyelidiki respon dari siswa terhadap LMS dan menguji keefektifannya dalam meningkatkan pemahaman konsep serta mengembangkan karakter siswa. Metode yang digunakan dalam penelitian ini adalah metode penelitian pengembangan. Uji produk menggunakan Pre Experimental Design dengan jenis Pretest and Posttest One Group Design. Instrumen penelitian berupa angket uji ahli, angket tanggapan, tes tertulis dan lembar observasi karakter. Teknik analisis data uji kefektifan menggunakan uji gain. Hasil tanggapan siswa untuk keseluruhan aspek mendapatkan prosentase diatas 82,5% kategori sangat baik. Hasil uji gain pemahaman konsep sebesar 0,56 dengan kategori sedang, artinya LMS efektif meningkatkan pemahaman konsep siswa. Sedangkan uji gain karakter 0,16 kategori rendah, artinya belum efektif mengembangkan karakter siswa.
MODEL EVALUASI KESUKSESAN DAN PENERIMAAN SISTEM INFORMASI E-LEARNING PADA LEMBAGA DIKLAT PEMERINTAH Pamugar, Haris; Winarno, Wing Wahyu; Najib, Warsun
Scientific Journal of Informatics Vol 1, No 1 (2014): May 2014
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v1i1.3638

Abstract

Sistem pembelajaran secara elektronik (e-learning) pada lembaga pendidikan dan pelatihan (diklat) pemerintah dibangun untuk memudahkan pegawainya dalam belajar secara on line melalui komputer di unit kerja masing- masing. Melalui sistem informasi e-learning pengguna dapat mengunduh materi diklat, mengambil dan mengumpulkan tugas-tugas, mengerjakan soal-soal ujian, melihat nilai tugas dan ujian, melihat peringkat diklat berdasarkan nilai yang diperoleh saat pelaksanaan diklat dan ikut serta dalam komunitas diskusi. Penggunaan sistem informasi e-learning di lingkup pemerintah memiliki karakteristik yang berbeda dengan lingkup perguruan tinggi. Hal ini berkaitan dengan karakteristik organisasi, proses bisnis organisasi, budaya organisasi dan karakteristik pelaku organisasi yang berbeda antara lingkup pemerintah dan lingkup perguruan tinggi. Perbedaan tersebut membutuhkan model evaluasi yang disesuaikan dengan karakteristik lembaga diklat pemerintah, sehingga dapat menggambarkan kesuksesan dan penerimaan pengguna terhadap sistem informasi e-learning. Untuk menentukan model evaluasi yang tepat dan sesuai dengan karakteristik lembaga diklat pemerintah, maka perlu dilakukan penelitian terkait model evaluasi sistem informasi. Penelitian ini mengusulkan model evaluasi integrasi dari model penerimaan UTAUT, model kesuksesan sistem informasi DeLone dan McLean dan model kesesuaian manusia-organisasi-teknologi HOT Fit dengan modifikasi yang disesuaikan dengan karakteristik lembaga diklat pemerintah dan dapat menggambarkan kesuksesan dan penerimaan sistem informasi e-learning-nya.
WATERMARKING TECHNIQUES USING LEAST SIGNIFICANT BIT ALGORITHM FOR DIGITAL IMAGE SECURITY STANDARD SOLUTION- BASED ANDROID Muzakir, Ari; Habibi, Mailan
Scientific Journal of Informatics Vol 4, No 1 (2017): May 2017
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v4i1.7290

Abstract

Ease of deployment of digital image through the internet has positive and negative sides, especially for owners of the original digital image. The positive side of the ease of rapid deployment is the owner of that image deploys digital image files to various sites in the world address. While the downside is that if there is no copyright that serves as protector of the image it will be very easily recognized ownership by other parties. Watermarking is one solution to protect the copyright and know the results of the digital image. With Digital Image Watermarking, copyright resulting digital image will be protected through the insertion of additional information such as owner information and the authenticity of the digital image. The least significant bit (LSB) is one of the algorithm is simple and easy to understand. The results of the simulations carried out using android smartphone shows that the LSB watermarking technique is not able to be seen by naked human eye, meaning there is no significant difference in the image of the original files with images that have been inserted watermarking. The resulting image has dimensions of 640x480 with a bit depth of 32 bits. In addition, to determine the function of the ability of the device (smartphone) in processing the image using this application used black box testing.
PENERAPAN FUZZY C-MEANS UNTUK DETEKSI DINI KEMAMPUAN PENALARAN MATEMATIS Sutoyo, Muh. Nurtanziz; Sumpala, Andi Tenri
Scientific Journal of Informatics Vol 2, No 2 (2015): November 2015
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v2i2.5080

Abstract

Penalaran matematis (mathematical reasoning) merupakan suatu proses berpikir yang dilakukan dengan cara untuk menarik kesimpulan. Penerapan data mining dapat membantu menganalisa data yang diperoleh dari kondisi kemampuan penalaran matematis. Teknik data mining yang digunakan adalah dengan menggunakan teknik clustering. Salah satu metode clustering adalah algoritma Fuzzy C-Means. Fuzzy C-Means memiliki tingkat akurasi yang tinggi dan waktu komputasi yang cepat. Uji validitas hasil clustering untuk deteksi dini kemampuan penalaran matematis dengan menggunakan perhitungan Partition Coeffecient (PC) diperoleh 0.840, ini berarti dapat dikatakan bahwa hasil clustering tergolong dalam kategori baik. Dari hasil perhitungan diperoleh 11 orang (25%) yang memiliki kemampuan penalaran matematis baik, sebanyak 25 orang (57%) memiliki kemampuan penalaran matematis cukup, dan sebanyak 8 (18%) orang memiliki kemampuan penalaran matematis yang kurang.
DECISION SUPPORT SYSTEM TO CHOOSE DIGITAL SINGLE LENS CAMERA WITH SIMPLE ADDITIVE WEIGHTING METHOD Putri, Tri Pina; Rosa, Paulina H. Prima
Scientific Journal of Informatics Vol 3, No 2 (2016): November 2016
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v3i2.7913

Abstract

One of the technologies that evolve today is Digital Single Lens Reflex (DSLR) camera. The number of products makes users have difficulties to choose the appropriate camera based on their criteria. Users may utilize several ways to help them choosing the intended camera such as using magazine, internet, and other media. This paper discusses about a web based decision support system to choose cameras by using SAW (Simple Additive Weighting) method in order to make the decision process more effective and efficient. This system is expected to give recommendations about the camera which is appropriate with the users need and criteria based on the cost, the resolution, the feature, the ISO, and the censor. The system was implemented by using PHP and MySQL. Based on the result of questionnaire distributed to 20 respondents, 60% respondents agree that this decision support system can help users to choose the appropriate camera DSLR in accordance with the users need, 60% of respondents agree that this decision support system is more effective to choose DSLR camera and 75% of respondents agree that this system is more efficient. In addition, 60.55% of respondents agree that this system has met 5 Es Usability Framework.
PENINGKATAN AKURASI ESTIMASI UKURAN PERANGKAT LUNAK DENGAN MENERAPKAN LOGIKA SAMAR METODE MAMDANI Saptono, Ristu; Hutama, Galih Dian
Scientific Journal of Informatics Vol 2, No 1 (2015): May 2015
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v2i1.4527

Abstract

Salah satu kunci sukses dari pengembangan perangkat lunak adalah perencanaan. Untuk membuat perencanaan yang baik diperlukan estimasi ukuran perangkat lunak yang akan dibangun. Ukuran perangkat lunak biasanya disajikan dalam bentuk Lines of Code (LOC). Metode Function Point Analysis (FPA) merupakan metode yang paling sering digunakan untuk memperkirakan ukuran perangkat lunak dalam satuan LOC. Akurasi dari FPA bisa ditingkatkan dengan cara penyesuaian nilai bobot pada tabel Function Point Complexity. Metode yang digunakan untuk penyesuaian nilai bobot adalah metode logika samar Mamdani. Evaluasi dilakukan dengan cara membandingkan galat relatif antara hasil pengukuran FPA murni, FPA modifikasi Mamdani model 1, FPA modifikasi Mamdani model 2 serta nilai tengah antara model 1 dan model 2, dengan nilai LOC sebenarnya dari perangkat lunak. Model 1 dan model 2 dibedakan oleh nilai himpunan fuzzy pada proses fuzzifikasi. Sebanyak 13 perangkat lunak digunakan untuk pengujian. Hasilnya estimasi menggunakan FPA nilai tengah memberikan hasil terbaik dengan galat terkecil yaitu 1,6% dibandingkan FPA modifikasi Mamdani model 1 (2%), FPA model 2 (3,2%) dan FPA Murni (3,4%). Perbedaan galat relatif tersebut mempunyai tingkat kepercayaan secara statistika sebesar 76%.
MODEL EXPERTISE MANAGEMENT SYSTEM DI UNIVERSITAS NEGERI SEMARANG Purwinarko, Aji; Sukestiyarno, YL
Scientific Journal of Informatics Vol 1, No 2 (2014): November 2014
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v1i2.4024

Abstract

Pemanfaatan sistem informasi sebagai penopang organisasi tidak dapat dipungkiri lagi, dimana setiap bagian dari organisasi diharapkan mampu memberikan pelayanan yang cepat dan akurat kepada setiap end user. Salah satu bentuk layanan sistem informasi tersebut adalah Expertise Management System (EMS). EMS dikembangkan di Universitas Negeri Semarang (UNNES) memiliki kemampuan untuk menyajikan data tentang pakar-pakar yang telah dimiliki UNNES kepada end user. Desain EMS melalui tahap prototype (analisis, perancangan, desain sistem, DFD, ERD, dan desain skema database), pemrograman, pengujian dan pemeliharaan. Melalui EMS ini pula, UNNES dapat menawarkan pakar-pakarnya untuk berkolaborasi dalam penelitian maupun kegiatan lainnya, sehingga dengan sendirinya akan memperkuat posisi UNNES di dalam persaingan tingkat regional maupun global.
ANALYSIS SECURITY OF SIA BASED DSS05 ON COBIT 5 USING CAPABILITY MATURITY MODEL INTEGRATION (CMMI) Handoyo, Eko; Umar, rusydi; Riadi, Imam
Scientific Journal of Informatics Vol 6, No 2 (2019): November 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v6i2.17387

Abstract

A secure academic information system is part of the college. The security of academic information systems is very important to maintain information optimally and safely. Along with the development of technology, academic information systems are often misused by some irresponsible parties that can cause threats. To prevent these things from happening, it is necessary to know the extent to which the security of the academic information system of universities is conducted by evaluating. So the research was conducted to determine the Maturity Level on the governance of the security of University Ahmad Dahlan academic information system by using the COBIT 5 framework on the DSS05 domain. The DSS05 domain on COBIT 5 is a good framework to be used in implementing and evaluating related to the security of academic information systems. Whereas to find out the achievement of evaluation of academic information system security level, CMMI method is needed. The combination of the COBIT 5 framework on the DSS05 domain using the CMMI method in academic information system security is able to provide a level of achievement in the form of a Maturity Level value. The results of the COBIT 5 framework analysis of the DSS05 domain use the CMMI method to get a Maturity level of 4,458 so that it determines the achievement of the evaluation of academic information systems at the tertiary level is Managed and Measurable. This level, universities are increasingly open to technological developments. Universities have applied the quantification concept in each process, and are always monitored and controlled for performance in the security of academic information systems.
A Combination of Hill Cipher and LSB for Image Security Susanto, Ajib; Mulyono, Ibnu Utomo Wahyu; Febrian, Muhamad Rizky Fajar; Rosyida, Ghaitsa Ardelia
Scientific Journal of Informatics Vol 7, No 1 (2020): May 2020
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v7i1.24393

Abstract

The maximum value obtained to test the encrypt hill cipher uses the avalanche effect with modification of one, two, three, and four key matrices 35.71%, therefore an additional security technique is needed. The Least Significant Bit (LSB) method is used to insert the ciphertext that has been generated from the hill cipher algorithm, has been testing using RGB, CMY, CMYK and YUV shapes with 6142 characters in 128 x 128 character images producing the highest PSNR value of 51.2826 dB in CMYK images. Steganography technique is applied because it has advantages in terms of imperceptibility, for example the results of a stego image are so similar to the original image that it is difficult to be distinguished by the human senses. Tests were carried out with 10 images, five images measuring 512 x 512 and five images measuring 16 x 16. While the messages to be inserted were 240, 480, and 960 characters for images measuring 512 x 512 and 24, 48 and 88 characters for images measuring 16 x16. Test results that I have done are calculated using Mean Square Error (MSE) and Peak Signal to Noise Ratio (PSNR) with a minimum PSNR of 51.2907 dB which means the resulting image is quite good. Computation time is calculated using tic toc on Matlab by encrypting 2000 and 6000 characters, and also computation time.
Geographic Information System for Booking Beauty Salon and Barber Shop with an Android-Based ECRM Approach Dharma Krisna Putra, Kadek; Piarsa, I Nyoman; Sukarsa, I Made
Scientific Journal of Informatics Vol 7, No 1 (2020): May 2020
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v7i1.22675

Abstract

Beauty salons and barber shop are a necessity for almost everyone. Nowadays, the business processes of them mostly still use conventional methods. The method gives obstacles to customers who have a lot of activities, for example, they have to come directly to the beauty salon or barber shop to take the queue. In addition, it is hard to promote, communicate and assess without E-CRM media. The location is also difficult to find because there is no guide mark on Google Maps. The Geographic Information System for Booking Beauty Salon and Barber Shop provides solutions for making scheduled bookings and transactions by using the e-CRM approach as in the application of promotional features to attract customers. There are some features offered in the application, such as chat features for communication, rating and review features to assess the services obtained, and route feature as a solution to show the location of selected vendors. The implementation process requires an Android smartphone and a computer device with software including Android Studio, SQLYog, XAMPP, and Visual Studio Code. The results of the implementation of the system based on the questionnaire showed 25.8% answered 'excellent', 45.7% answered 'good', 28.3% answered 'enough', and 0.2% answered 'bad'.

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