The Improvement of Flip (2,2) Visual Cryptography Images Using Two Key Images

The Flip (2, 2) Visual Cryptography (FVC) is one of the techniques used to encrypt the two secret images into two dual purpose transparencies. The two transparencies can be sent to the objective person. The first secret images can be obtained by stacking the two transparencies and the second secret images can be obtained by stacking the one transparency with the flipping other transparency. Unfortunately, the result decryption processes still have noise and the quality of decrypted secret image is not as same as original secret image. This article proposed the new algorithm to improve the quality of decryption secret image. In this process, the two secret images from decryption process were compared with the two original secret images. The different values of each pixel, which was counted from subtraction of decryption image and original secret images, will be inserted to the two key images. The experimental results of this improvement have a good similarity. The noise in decryption process can be eliminated so the two secret images reconstruction similar to the original secret images

Pemodelan Interaksi Aktivitas Pasangan Suami Istri Pemilik Kendaraan Pribadi di Kecamatan Tembalang

Aktivitas rumah tangga dilakukan berdasarkan karakteristik sosial ekonomi dari anggota rumah tangga. Setiap anggota rumah tangga memiliki interaksi aktivitas yang dapat mempengaruhi keputusan pergerakan dari masing-masing anggota rumah tangga. Keputusan pergerakan dilakukan untuk memaksimalkan penggunaan waktu dan alokasi tugas dalam rumah tangga, sehingga produktivitas dan utilitas rumah tangga mencapai nilai maksimal. Di Kota Semarang, terutama di Kecamatan Tembalang, kondisi transportasi umum masih belum mampu memenuhi permintaan pergerakan untuk kepala rumah tangga. Kondisi ini mengakibatkan pasangan suami istri (household heads) memutuskan untuk menggunakan kendaraan pribadi (mobil dan sepeda motor) untuk permintaan pergerakannya. Penelitian ini mencoba menjawab pertanyaan penelitian “bagaimana model interaksi aktivitas pada pasangan suami istri pemilik kendaraan pribadi di Kecamatan Tembalang?”. Model struktural digunakan untuk menjelaskan interaksi aktivitas antara pasangan suami istri dalam kepemilikan kendaraan pribadi di Kecamatan Tembalang. Model ini mencoba menjelaskan keterkaitan antara aktivitas pasangan suami istri, aksesibilitas pasangan suami istri, dan hambatan pergerakan pasangan suami istri. Penelitian ini menggunakan AMOS 16 untuk menjelaskan keterkaitan antar variabel melalui diagram jalur dan hasil statistik. Hasil dari penelitian ini diharapkan dapat menjadi rekomendasi dalam pembuatan kebijakan transportasi, terutama untuk mengurangi kepemilikan kendaraan pribadi di Kecamatan Tembalang dan sebagai bahan evaluasi untuk pelayanan transportasi umum

Pengaruh Variasi Temperatur Penuangan Al-si / Al2o3 Terhadap Sifat Mekanik Dan Struktur Mikro Material Sepatu Rem Menggunakan Pengecoran Hpdc

In this research, the raw material used Al-Si is a product of PT. Pinjaya Metals, Mojokerto. HPDC performed at a constant pressure of 7 MPa and variation of pouring temperature at 700°C, 750oC, and 800oC. The heat treatment process used is age hardening with solution treatment at 490oC for 15 minutes, then artificial aging at 150oC for 4 hours. Porosity test performed using the Archimedes law that use mass of wet and dry specimen. Hardness test using Rockwell method with the scale of B, and test the microstructure using an optical microscope with a magnification of 1000X. The results of porosity test show that the density at pouring temperature 700°C is 1,613 g/cm3, at 750oC is 1,642 g/cm3, and at 800oC is 1,622 g/cm3. On the hardness testing increased hardness values was obtained at pouring temperature 700°C is 38 HRB. While at pouring temperature 750oC is 43,67 HRB and 800oC is 46,06 HRB. On themicrostucture, at pouring temperature 750oC and 800oC shows that the value of the grain size is lower than the size of a grain of pouring temperature on 700oC. Further results on testing was able to show that there is value in flow ability that the higher when the temperature increasing in 700°C is 580,67 mm, 750°C is 682,33 mm and then 800°C is 965,33 mm

Pengaruh Corporate Governance, Ukuran Perusahaan, Rasio Hutang Dan Profitabilitas Terhadap Tarif Pajak Efektif (Studi Empiris Pada Perusahaan Perbankanyang Terdaftar Di Bursa Efek Indonesia Tahun 2013-2015)

The aim of this study is to examine the effect of corporate governance, firm size, debt ratio and profitability on effective tax rate on banking companies listed in IDX (Indonesia Stock Exchange) during the period 2013-2015.The sample in this study consisted of 23 banking companies in IDX (Indonesia Stock Exchange) during the period 2013-2015 were selected based on certain criteria by using purposive sampling. With 3-year observation period for the sample amounted to 69 samples. The analytical method used is multiple linear regression analysis with t test and the coefficient of determination were processed using SPSS program. The partial regression test (t test) proves that corporate governance, firm size and debt ratio has significant negative effect to effective tax rate. While profitability has significant positive effect to effective tax rate.The results of the coefficient determination (R²) showed that 59,7% of the variation in effective tax rate can be explained by the independent variable, while the remaining 40.3% is explained by other variables that are not in this study

Pengembangan Bahan Ajar Buku Pintar Membaca Berbasis QR-Code pada Keterampilan Membaca Siswa di Pelajaran Bahasa Indonesia Kelas II SD Negeri Napallicin

Penelitian ini bertujuan untuk mengembangkan sebuah produk bahan ajar buku pintar membaca berbasis QR-Code. Menguji kevalidan, kepraktisan dan keefektifan bahan ajar buku pintar membaca berbasis QR-Code  untuk siswa sekolah dasar. Jenis penelitian ini yaitu Research and Development dengan model pengembangan ADDIE. Subjek penelitian ini sebanyak 17 siswa dan siswa kelas II SD Neger Napalliicin. Teknik pengumpulan data menggunakan wawancara, dokumentasi, dan angket. Berdasarkan hasil validasi bahan ajar buku pintar membaca berbasis QR-Code berdasarkan penilian ahli bahasa, materi dan media menuinjukan bahwa bahan ajar memenuhi kriteria valid dengan skor rata-rata 0,82. Sedangkan dari analisis penilaian lembar kepraktisan guru dan siswa diperoleh bahwa bahan ajar buku pintar membaca berbasis QR-Code memenuhi kriteria praktis dengan skor rata-rata  85,52%.  Pada uji  lapangan  diperoleh  N-gain  (g) sebesar  0,73  dengan klasifikasi  tinggi,  yang  artinya bahan ajar buku pintar membaca berbasis QR-Code memiliki  efektifitas tinggi. Simpulan, bahwa bahan ajar buku pintar membaca berbsis QR-Code terbukti valid, praktis dan memiliki keefektifan dalam pembelajaran untuk siswa sekolah dasar.   Kata Kunci: Buku Pintar, Pengembangan, QR-Cod

Motivasi Berprestasi Atlet Putri Pada Cabang Olahraga Futsal Se-pekanbaru

Problem in this research is not maximal performance of futsal inPekanbaru. It is suspected because there is no achievement motivation from the femalefutsal players. Therefore the purpose of this research was to determine the achievementmotivation from female futsal players in Pekanbaru. Population in this research were 7teams and total is 82 people with sample using purposive sampling with 3 teams that istotal is 30 people. The method used is descriptive analysis percentage. It will analyzethe problems encountered in this research regarding the “achievement motivationfemale athletes futsal in Pekanbaru. Based on the results obtained from the femaleathletes achievement motivation in sport futsal in Pekanbaru, the first indicatorsamounted 75,583%, the second indicator amounted to 83,263%, the third indicatoramounted to 74,583%. The third of indicator result is 79,36%. If we compare it with thecriteria of analysis, descriptive presentation can be classified either that the range of76-100%

Fish Farmers Attitude Towards Government Assistance in Aquaculture of Tilapia (Oreocromis Niloticus) in Perhentian Luas Village, Logas Tanah Darat District, Kuantan Singingi Regency, Riau Province

This research was conducted on 28 July to 14 August 2013 in the PerhentianLuas Village, Logas Tanah Darat District, Kuantan Singingi Regency, Riau Province.This research purposed to investigate the characteristics of fish farmers, knew theattitude of farmers towards government assistance, knew the relationship betweencharacteristics of multiple variables with farmers attitude towards governmentassistance. This research used survey method. Respondents in this research was fishfarmers who received government assistance.Results of farmers attitudes toward government aid analysis was mostly good,namely 64.29%. Farmers attitude towards farming activities also showed a goodattitude at 50.00%. Results of farmers attitude analysis with some characteristicsvariables obtained after correlated have known that the relationship between age didnot correlate perfectly to the assistance with rs 0.062 its smaller than the value of P(0.832). While on production value greater than (0.344) P (0.228) mean age hadeffect on tilapia farming activities. Education was not perfectly correlated to the aidand on production with a value of 0.125 Spearman rank correlation value less than P(0.670) and the value of correlation Spearman Rank. While income was not perfectlycorrelated to aid with rs 0.212, less than P value (0.466), as well as on aquacultureactivities, it's smalleer than P (0.744) that's mean income didn't have effect onaquaculture