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Use of Lipat Algorithm on Android to Secure Data Communication in Social Media Wintolo, Hero; Pujiastuti, Asih; Imam, Muhammad
SENATIK STT Adisutjipto Vol 4 (2018): Transformasi Teknologi untuk Mendukung Ketahanan Nasional [ ISBN 978-602-52742-0-6 ]
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (463.228 KB) | DOI: 10.28989/senatik.v4i0.138

Abstract

Cryptography is one of science that learn about securing a message. Message security is done by randomizing the message (encryption) and returned to it’s original form (description). In this study, the designer of the system first and build an application to secure the message by using the Lipat Algorithm method that aims to secure messages consisting of letters, numbers, or symbols. Applications are designed and built running on Mobile Android. The Lipat Algorithm Method applies a fourfold system in the encryption process and the description of the message to be encrypted and in the description will advance 4 (four) characters forward or backward. Based on testing done the application managed to perform the encryption process and description correctly, ranging from short messages to messages as much as 2305 characters.
Decision Support System for The Weaning of Rex Rabbit Using Simple Additive Weighting ( SAW ) Method Pujiastuti, Asih; Ardiansyah, Fachrul
Compiler Vol 8, No 1 (2019): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (725.315 KB) | DOI: 10.28989/compiler.v8i1.422

Abstract

Weaning REX rabbits child is one of the keys to success in raising or cultivating rabbits. Unsuitable weaning can result in very high mortality or mortality risks, while weaning for too long results in decreased productivity and the possible marriage of children with rabbit parent. The research done is to design and build the application of decision support system (DSS) with Simple Additive Weighting method (SAW) with 5 criteria as supporting of DSS calculation that are body weight (gram), body length (cm), still breastfeeding or not, already independent for food or not and Gender. The webased DSS application created is tested  by using the calculation system compared with research data. Based on the test of 36 rabbit children which is derived from previous research results obtained showed that the application of the DSS are built 100% the same result.
SISTEM PERHITUNGAN LAMA PENYINARAN MATAHARI DENGAN METODE OTSU THRESHOLD (STUDI KASUS: ST. KLIMATOLOGI BARONGAN) Pujiastuti, Asih; Harjoko, Agus
Compiler Vol 5, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (195.955 KB) | DOI: 10.28989/compiler.v5i2.166

Abstract

Solar radiation measurements in climatology station barongan done by using campbell stokes and record card. Solar radiation is the accumulation of the whole length of the object radiation recorded on the record card. Solar radiation data reading performed by observers by estimating the long of object irradiation compared with the scale of hours listed on the record card. The difficulties encountered by observers in conducting solar radiation data readout is the shape of the object radiation recorded on the record card are not always in the form of elongated areas, some areas disjointed, even can only form small holes along the track on the card record. The purpose of this study was to design and build a system that can be used to calculate solar radiation recorded on the card record, thus increasing the accuracy of measurement data readout. Cropping process is carried out in order to obtain the right area for analysis. The approach method in object segmentation is done by implementing a solar radiation threshold otsu method. The test results showed that the determination o f the radius o f the opening and removing noise value appropriately irradiation can obtain the number o f objects on test images with RMSEof1.4429 compared with the amount o f exposure o f the image o f the original object. Results o f calculation solar radiation by the system showed system RMSE o f 0,51 to observer calculation.
KLASIFIKASI TEKS MENGGUNAKAN CHI SQUARE FEATURE SELECTION UNTUK MENENTUKAN KOMIK BERDASARKAN PERIODE, MATERI DAN FISIKDENGAN ALGORITMA NAIVEBAYES Anisah, Siti; Honggowibowo, Anton Setiawan; Pujiastuti, Asih
Compiler Vol 5, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (159.289 KB) | DOI: 10.28989/compiler.v5i2.171

Abstract

A comic has its own characteristics compared the other types of books. The difference between comic and other books can be seen from the category o f period, material and physical. Comicand other booksneeded an application o f classification system. Looking for the problem, classification system was made using Chi Square Feature Selection and Naive Bayes algorithm to determine the comic based on the period, material and physical. Delphi programming language and Oracle Database are used to build the Classification System. Chi Square Feature Selection acquired trait a comic is in 0.10347 and which not comic is in 1.9531. Furthermore, data is classified by the Naive Bayes algorithm. From 120 titles o f comic that consists 60 titles o f comic and non comicused to build classesfor trainand 60 titles o f comic and non comic used to test. The results o f Naive Bayesalgorithm for comic is 96,67%with 3.33% error rate, and non comic is 90% with 10% error rate. The classification to determine comic is good.
Pembuatan Profil Produk Untuk Pemasaran Barang Dan Jasa Bagi UP2K-PKK Kelurahan Prawirodirjan Gondomanan Yogyakarta Agustian, Harliyus; Pujiastuti, Asih; Ayuningtyas, Astika; Honggowibowo, Anton Setiawan; Indrianingsih, Yuliani
KACANEGARA Jurnal Pengabdian pada Masyarakat Vol 2, No 2 (2019): Juli
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (729.181 KB) | DOI: 10.28989/kacanegara.v2i2.447

Abstract

Family Income Improvement Company (UP2K) - Fostering Family Welfare (PKK) is a form of activity aimed at improving the family economy. The UP2K-PKK in Prawirodirjan brings together 27 players in the goods and services trade. It is possible to increase the marketing of UP2K-PKK participants' products in Prawirodirjan by creating product profiles as a means of offering or promoting. To create a product profile, you can create product photos using a smartphone. Taking pictures to take pictures of products requires photography and photo editing techniques using a smartphone. Improved photographic techniques and photo editing skills of UP2K-PKK participants can be achieved through training support provided by lecturers from the Computer Science Department of the Yogyakarta Adisucipto College of Technology as a form of community service activity.
Region of Interest (ROI) Determination System on SO-40F Pias Card’s Type for Measurement of Sunshine Duration (Case Study: St. Barongan) Pujiastuti, Asih
SENATIK STT Adisutjipto Vol 5 (2019): Peran Teknologi untuk Revitalisasi Bandara dan Transportasi Udara [ISBN XXX-XXX-XXXXX-
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v5i0.327

Abstract

The burn marks on the Pias Card are located on a scale of 6 -18 data is the sunshine duration. Determination of Region of Interest (RoI) is done with the aim of reducing noise in the Pias Card image segmentation process. solar irradiation system developed to determine areas that are considered important according to scale using the Cropping method. The system testing was carried out using 107 data of Pias Cards. Type Pias Card is SO-40F. Cropping principle is still manual, namely by setting the height of the image (Heigth), the left border (Left), and the right border (Right) in pixels. Based on testing, the best value settings are Heigth (H) = 5, Left (L) = 125, and Right (R) = 250 with a percentage of cropping success is 91.67%. 
Cryptography of Java Language Using Basa Walikan Methods in Yogyakarta Wintolo, Hero; Pujiastuti, Asih; Astuti, Ellyana Mega Dewantri
SENATIK STT Adisutjipto Vol 5 (2019): Peran Teknologi untuk Revitalisasi Bandara dan Transportasi Udara [ISBN XXX-XXX-XXXXX-
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v5i0.292

Abstract

Basa Walikan can be used as one of the methods in cryptography because the Basa Walikan character exchange process is not easily understood by all people who can speak Javanese. Basa Walikan used in this research  is Basa-Walikan in Yogyakarta, which is sourced from Javanese script characters written in a two-line countdown rule. In Roman characters it becomes ha, na, ca, ra, ka, da, ta, sa, wa, la, pa, dha, ja, yes, nya, ma, ga, ba, tha, nga. The characters in Javanese script are written in 4 (four) lines. The process of character reversal in Basa Walikan uses the mechanism of the first line exchanged with the third line and the second line is swapped to the fourth line as well as the opposite. In this research software for message safety with Basa Walikan was made. From the White Box and Black Box test results it can be concluded that the encryption process and the description process are in accordance with the design of the application being made. If the word being tested is two consonants m and p that are close together, then the encryption process and the description process is done separately or by character.
PENDAMPINGAN PEMBUATAN VIDEO STOP MOTION UNTUK PEMASARAN PRODUK UMKM DI PATUK GUNUNGKIDUL Pujiastuti, Asih; Ayuningtyas, Astika; Agustian, Harliyus
KACANEGARA Jurnal Pengabdian pada Masyarakat Vol 3, No 1 (2020): Januari
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (944.023 KB) | DOI: 10.28989/kacanegara.v3i1.520

Abstract

By developing the commercialization of micro, small and medium enterprise (MSME) products in Patuk Gunungkidul district, Instagram social media can be used by creating content in the form of stop motion videos. The creation of stop-motion videos requires the knowledge and skills of MSME actors. Help with the production of stop motion videos is therefore necessary to improve the marketing of products. The assistance consists of introducing stop-motion video, photo-taking techniques and posting stop-motion video content on Instagram. The results of mentoring activities revealed that SMEs in Patuk Gunungkidul's sub-district had the skills to create stop-motion videos on their products. In addition, they were also able to post videos of products they had made on Instagram social networks.
Cryptography of Java Language Using Basa Walikan Methods in Yogyakarta Wintolo, Hero; Pujiastuti, Asih; Astuti, Ellyana Mega Dewantri
SENATIK STT Adisutjipto Vol 5 (2019): Peran Teknologi untuk Revitalisasi Bandara dan Transportasi Udara [ISBN 978-602-52742-
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v5i0.292

Abstract

Basa Walikan can be used as one of the methods in cryptography because the Basa Walikan character exchange process is not easily understood by all people who can speak Javanese. Basa Walikan used in this research  is Basa-Walikan in Yogyakarta, which is sourced from Javanese script characters written in a two-line countdown rule. In Roman characters it becomes ha, na, ca, ra, ka, da, ta, sa, wa, la, pa, dha, ja, yes, nya, ma, ga, ba, tha, nga. The characters in Javanese script are written in 4 (four) lines. The process of character reversal in Basa Walikan uses the mechanism of the first line exchanged with the third line and the second line is swapped to the fourth line as well as the opposite. In this research software for message safety with Basa Walikan was made. From the White Box and Black Box test results it can be concluded that the encryption process and the description process are in accordance with the design of the application being made. If the word being tested is two consonants m and p that are close together, then the encryption process and the description process is done separately or by character.
Comparison Of Simple Moving Average and Exponential Smoothing Methods To Predict Seaweed Prices Harliyus Agustian; Asih Pujiastuti; Muhammad Varian Sayoga
CCIT Journal Vol 13 No 2 (2020): CCIT JOURNAL
Publisher : Universitas Raharja

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1068.375 KB) | DOI: 10.33050/ccit.v13i2.1033

Abstract

Seaweed is one of the main superior commodities in the City of Tarakan. The problem often faced in the field is that the increase in production is not proportional to the price of seaweed that fluctuates every month from year to year, making it difficult for collectors to determine the price of seaweed for sale. Price increases caused by various factors such as the drying process, long marketing chains, and increasing demand from domestic companies. In determining the price of seaweed in the future some approach is needed to predict or predict the price of seaweed in the following month. Forecasting (forecast) is an activity or business that knows the events that will occur at that time will use historical data. Prediction methods used in this study are Simple Moving Average and Exponential Smoothing, these two methods will be guided to find out the most appropriate method used in predicting. Based on the minimum error value calculated using the values of MAD, MSE, MFE, MAPE and CFE, it is found that the Simple moving average forecasting method is considered the best method that can be used to forecast seaweed prices.