Judul: Sistem SMS Spam Detector untuk SMS Berbahasa Indonesia pada Smartphone Android
Abstrak: Nowadays, the presence of SMSs that indicate fraud acts is rising and very disturbing. Those SMSs often use unsuspicious sentences, so that people maybe misleaded. Several algorithms have been studied to find the SMS patterns that indicate the presence of fraud, hoax, and advertisement. The pattern was then used to filter the next incoming SMS spam. Naïve Bayes algorithm is one of the most effective approaches used in filtering techniques. Therefore, this research implements this method on Android smartphone to prevent SMS spam from reaching their destination. Several SMSs that contain fraud, hoax, and advertisement were used to test the application. It was found that the proposed application can detect and classify SMS spam with 100% accuracy on the testing dataset.
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Judul: Mesin Pencari SMS berbasis Android dengan Menggunakan Metode N-gram
Abstrak: Search engines Short-Messaging Service (SMS) on mobile devices are still using the exact match method. This method can only find SMS containing words, which one exact matches of the query. Therefore, a method to correct the spelling of the text is needed. Trigram similarity measure method is one of spelling correction methods developed which gives a relatively good performance. Therefore, this study applied the method of N-gram with bigram models and trigram models for SMS in Indonesian. The result of this research is a search engine with an average precision (AVP) 49.6% for bigram models and 80.8% for trigram models.
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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