Garuda - Garba Rujukan Digital

RANCANG BANGUN PROTOTYPE SYSTEM MONITORING KELEMBABAN TANAH MELALUI SMS BERDASARKAN HASIL PENYIRAMAN TANAMAN “STUDI KASUS TANAMAN CABAI DAN TOMAT” Caesar Pats Yahwe; Isnawaty Isnawaty; L.M Fid Aksara
semanTIK Vol 2, No 1 (2016): semanTIK
Publisher : Informatics Engineering Department of Halu Oleo University

Watering is a matter that can not be discharged in maintaining and caring for plants in order to keep the plants thrive. needs enough water greatly affect plant growth. Examples such as chilli and tomato crops that require special attention because if the plant is not getting a good condition, the plants do not grow well, even be fatal for the plant. Monitoring of watering based on Soil Moisture via SMS based microcontroller is one way that can be used in monitoring and caring for the plants remain in good condition. So as to minimize the time and power plant owners in their activities without the direct care of a plant that belongs. By using Arduino UNO as a main controller is programmed to determine the Soil Moisture the plant through the Soil Moisture Sensor FC-28 were planted in the ground and the results of Soil Moisture the plants obtained will be sent to the mobile phone owner of the plant through the medium of SMS is connected to the GSM Shield ATWIN Quad-Band. When the condition of Soil Moisture detection sensors poor crop, then the Arduino UNO will give the command to start the engine Relay for water and do watering plants. The test results of Soil Moisture monitoring via SMS based on the results of watering the plants showed that the Soil Moisture Sensor FC-28 can detect Soil Moisture and tools can be watering when the soil is dry then sms gateway will work automatically to send an SMS to the owner of the plant. The percentage of success of the tool by 93,75%. Keywords— SMS, Arduino UNO, Soil Moisture Sensor FC-28, GSM Shield ATWIN Quad-Band

IMPLEMENTASI ALGORITMA RC4 STREAM CIPHER SEBAGAI METODE OBFUSCATION STRING PADA DATABASE MySQL Muhammad Sholeh; Isnawaty Isnawaty; Bambang Pramono
semanTIK Vol 5, No 1 (2019): semanTIK
Publisher : Informatics Engineering Department of Halu Oleo University

A database is a set of structured data and related to one another to form information. In the current technological development database management is very important considering the amount of information stored in the database of a system. One management that needs to be considered is the management of Database security.In securing the database there are many ways that can be used. One of them is by randomizing the contents of the database to confuse users who access the Database illegally. This randomization technique is called the Obfuscation String.One algorithm that can be used to randomize the database is the RC4 algorithm. This algorithm uses key lengths from 1 to 256 bits which are used to initialize tables as long as 256 bytes. This table is used to generate tables from a pseudo-random array using XOR operations with text to produce a ciphertext.The results of this study are a system that can randomize cell contents in a MySQL Database table using the RC4 Stream Cipher algorithm. From this study, it can also be concluded that the key length and the amount of data in the database table can affect the speed of program execution.Keywords—Database, Obfuscation String, RC4 AlgorithmDOI : 10.5281/zenodo.3066721

IMPLEMENTASI DISCRETE WAVELET TRANSFORM UNTUK PENYISIPAN TEKS PADA GAMBAR Andi Prawirawan; Isnawaty Isnawaty; Rahmat Ramadhan
semanTIK Vol 1, No 1 (2015): semanTIK
Publisher : Informatics Engineering Department of Halu Oleo University

Steganografi merupakan ilmu dan seni yang mempelajari cara penyembunyian pesan rahasia ke dalam suatu media sedemikian sehingga manusia tidak dapat menyadari keberadaan pesan tersebut. Pada skripsi ini, dilakukan penelitian mengenai penerapan steganografi dengan metode Discrete Wavelet Transform (DWT) pada media gambar dan teks sebagai pesan rahasia. Steganografi teks pada gambar dilakukan dengan menyembunyikan pesan rahasia pada hasil dekomposisi DWT level satu pada subband LL. Gambar direkonstruksi melalui proses upsampling dan filtering menggunakan highpass dan lowpass reconstruction filter dari tiap-tiap subband. Berkas citra hasil dari proses steganografi sering disebut sebagai citra stego (stego image). Pada penelitian ini, penilaian kualitas citra stego dilakukan secara objektif, yaitu dengan cara menghitung nilai PSNR (Peak Signal to Noise Ratio). Nilai PSNR ini didapat dengan mengkomparasikan citra asli (cover image) dengan citra stego dengan menghitung nilai MSE (Mean Square Error) terlebih dahulu. Hasil penelitian ini adalah dapat dibuat suatu aplikasisteganografi yang dapat menyisipkan dan mengekstraksi pesan teks pada gambar digital, dengan menggunakan metode DWT. Aplikasi ini diharapkan dapat menjaga keamanan pesan teks yang dirahasiakan, serta dapat melindungi pesan teks yang dirahasiakan terhadap akses dari pihak-pihak yang tidak berhak.

IMPLEMENTASI ROBOT LINE FOLLOWER PENYIRAM TANAMAN OTOMATIS MENGGUNAKAN METODE PROPORTIONAL–INTEGRAL–DERIVATIVE CONTROLLER (PID) Muhammad Yusuf; Isnawaty Isnawaty; Rahmat Ramadhan
semanTIK Vol 2, No 1 (2016): semanTIK
Publisher : Informatics Engineering Department of Halu Oleo University

The use of robots can be applied in plant watering vegetables, fruits and flowers using the greenhouse system. Greenhouse system is not affected by rainfall so that the robot can be used for watering plants that perform settings using time as a command to do the watering. The method used to control a robot that is PID (ProPortional language of abbreviations - Integral - Derivative controller) is a controller to determine the precision of the instrumentation system with the characteristics of their feedback on the proficiency level system. PID control component consists of three types: ProPortional, Integrative and Derivative. All three can be used together or individually depending on the response we wanted to a plant. The working principle of robot watering is done by detecting robot lines as the future path of robotic automation. Line search performed by detecting the light emitted by the LED and read by the sensor Photodioda. To follow the line of the robot are driven by a DC motor which is controlled using PID method, the robot moves automatically using the application of a DC motor. Robot uses sensor readings Photodioda to do watering, after the robot detects an intersection on the path the robot will stop and turn on the water pump to do the watering and if the robot was doing the watering according to what was ordered by the program the robot will toward the place dismissal is to detect fork in the path. Keywords— Robot, Line Follower, PID, Automated Watering Plants

ANALISIS PERBANDINGAN METODE BAYES DAN METODE FUZZY TSUKAMOTO TERHADAP HASIL DIAGNOSIS PENYAKIT DIABETES MELITUS DALAM APLIKASI SISTEM PAKAR BERBASIS WEB Michiko Rezky Amalia; Isnawaty Isnawaty; L.M Tajidun
semanTIK Vol 2, No 1 (2016): semanTIK
Publisher : Informatics Engineering Department of Halu Oleo University

Sistem pakar adalah sistem yang berusaha mengadopsi pengetahuan manusia ke komputer untuk menyelesaikan masalah seperti yang biasa dilakukan oleh para ahli. Salah satu contohnya sistem pakar diagnosa penyakit Diabetes Melitus. Tujuan dari penelitian ini adalah membuat suatu aplikasi sistem pakar diagnosa penyakit pada Diabetes Melitus menggunakan metode Bayes dan Fuzzy Tsukamoto. Proses diagnosa dimulai dengan memilih gejala yang ditampilkan sistem kepada user. Alur sistem diatur menggunakan metode inferensi Backward Chaining. Setelah memilih gejala, user diharuskan mengisi nilai intensitas dari setiap gejala. Sistem akan menampilkan Hasil diagnosa penyakit dengan persentase kepercayaan menggunakan metode Bayes dan Fuzzy Tsukamoto. Hasil pengujian menunjukkan bahwa nilai persentase kepercayaan menggunakan metode Fuzzy Tsukamoto lebih baik dibandingkan metode Bayes. Hal tersebut dikarenakan perhitungan metode Fuzzy Tsukamoto dipengaruhi nilai intensitas dari setiap gejala yang dialami dan setiap rule yang telah ditentukan, sedangkan metode Bayes dipengaruhi bobot penyakit dan bobot gejala yang telah ditentukan oleh Pakar. Kata kunci : Metode Logika Fuzzy Tsukamoto, Metode Bayes, Sistem Pakar, Diabetes Melitus, Backward Chaining

PENYADAPAN SMS DAN GPS BERBASIS ANDROID MENGGUNAKAN ALGORITMA ADVANCED ENCRYPTION STANDARD (AES) Rahmayunita Rahmayunita; Isnawaty Isnawaty; Sutardi Sutardi
semanTIK Vol 1, No 2 (2015): semanTIK
Publisher : Informatics Engineering Department of Halu Oleo University

Salah satu fitur handphone yang paling sering digunakan saat ini adalah Short Message Service (SMS). SMS merupakan layanan yang disediakan oleh handphone untuk mengirim ataupun menerima pesan singkat. Selain itu, fitur Global Positionig System (GPS) saat ini juga sangat dibutuhkan oleh masyarakat dimana dapat membantu dalam pelacakan. Tujuan dari penelitian ini adalah untuk merancang sebuah aplikasi yang dapat membantu dalam mengontrol kegiatan atau pun aktivitas yang dilakukan oleh kerabat ataupun orang lain, serta mengamankan data SMS dan lokasi GPS kerabat yang akan dipantau untuk menghindari ancaman pengaksesan dari pihak – pihak yang tidak berwenang. Metode yang digunakan untuk penyadapan SMS dan GPS yaitu dengan menggunakan perantara web service, sedangkan metode yang digunakan untuk mengamankan data SMS dan GPS adalah metode Advanced Encryption Standard (AES). Metode AES merupakan metode kriptografi kunci simetri yaitu kunci untuk enkripsi sama dengan kunci untuk dekripsi. Hasil penelitian ini menunjukkan bahwa SMS dan lokasi GPS dapat terkirim ke web server dengan adanya fungsi web service yang akan mentransfer data SMS yang ada pada handphone dan menangkap lokasi GPS pihak tersadap. Untuk penelitian enkripsi AES menunjukkan bahwa pesan yang sama dengan kunci yang berbeda dapat menghasilkan chipertext yang berbeda. Kata Kunci : Penyadapan, SMS, GPS, Android, Web Service, Algoritma AES, enkripsi, dekripsi

IMPLEMENTATION OF REDUNDANCY PROTOCOL LOAD BALANCING VIRTUAL ROUTER (VRRP) USING ROUND ROBIN ALGORITHM IN DATA SERVICES Muhamad Amsyar; Isnawaty Isnawaty; Natalis Ransi
semanTIK Vol 5, No 2 (2019): semanTIK
Publisher : Informatics Engineering Department of Halu Oleo University

Computer networks are the most important part of communication systems in our lives, without a computer network we cannot communicate with one another. For that we need to maintain the quality level of network services by minimizing the occurrence of failures in a network device, by which it is necessary to have a network device that can take over from the main device. Protokoli Virtual VR Redundancy (VRRP) is a protocol that is responsible for running the backup router functions when the master router has a fault condition. Mikrotik is a router that can implement load balancing techniques. Load balancing has four methods that can be applied, one of which is the Nth method, the Nth method is the development of the round robin algorithm. Load balancing is a technique for distributing traffic loads on two or more connection lines in a balanced manner. The system that was built using VRRP load balancing, was able to solve the problem when one ISP experienced a connection breakup. Systems that are built using the Nth load balancing method can divide the load equally from one gateway to another gateway. Based on the Quality of Service test on load balancing devices using the microtic routerboard 951Ui-2HnD, the results of the delay, packet loss and throughput values are good as well as the average values obtained in the Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) category .

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