Thomas Sri Widodo
Gadjah Mada University
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Featured researches published by Thomas Sri Widodo.
international symposium on information technology | 2010
Enas Dhuhri Kusuma; Thomas Sri Widodo
Two dimensional DCT takes important role in JPEG image compression. Architecture and VHDL design of 2-D DCT, combined with quantization and zig-zag arrangement, is described in this paper. The architecture is used in JPEG image compression. DCT calculation used in this paper is made using scaled DCT. The output of DCT module needs to be multiplied with post-scaler value to get the real DCT coefficients. Post-scaling process is done together with quantization process. 2-D DCT is computed by combining two 1-D DCT that connected by a transpose buffer. This design aimed to be implemented in cheap Spartan-3E XC3S500 FPGA. The 2-D DCT architecture uses 3174 gates, 1145 Slices, 21 I/O pins, and 11 multipliers of one Xilinx Spartan-3E XC3S500E FPGA and reaches an operating frequency of 84.81 MHz. One input block with 8×8 elements of 8 bits each is processed in 2470 ns and pipeline latency is 123 clock cycles.
international conference on information technology, computer, and electrical engineering | 2014
Imam Santoso; Thomas Sri Widodo; Adhi Susanto; Maesadjie Tjokronagoro
This paper describes the temperature response analysis due to the heat effect as a result of microwave hyperthermia irradiation in biological medium for a finite duration time. Since we use the on and off irradiation method, realized by pulse width signal with certain duty cycle value, it is important to know whether the on heating duration can generate sufficient desired heat and the off duration decrease significantly. The bioheat transfer equation and its approximation can help us in analyzing the above relation. According to the analysis and real experiment, our proposed pulse width irradiation with 10s pulse period and its duty cycle variation values used in our 2.45 GHz microwave hyperthermia system can provide sufficient temperature increase during on duration and not significant decrease temperature during off duration, to get the required hyperthermia temperature response.
International Journal of Computer Science and Information Technology | 2011
Indah Soesanti; Adhi Susanto; Thomas Sri Widodo; Maesadji Tjokronagoro
Archive | 2011
Adhi Susanto; Thomas Sri Widodo
international conference on electronics and information engineering | 2010
S. Ratna Sulistiyanti; Thomas Sri Widodo; Adhi Susanto; Gede Bayu Suparta
Archive | 2011
S. Ratna Sulistiyanti; Adhi Susanto; Thomas Sri Widodo; Gede Bayu Suparta
World Academy of Science, Engineering and Technology, International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering | 2010
S. Ratna Sulistiyanti; Adhi Susanto; Thomas Sri Widodo; Gede Bayu Suparta
IAES International Journal of Artificial Intelligence | 2012
Endro Yulianto; Adhi Susanto; Thomas Sri Widodo; Samekto Wibowo
Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI) | 2013
Andrey Nino Kurniawan Nino Kurniawan; Thomas Sri Widodo; Indah Soesanti
Jurnal Sistem Komputer | 2012
R. Rizal Isnanto; Imam Santoso; Teguh Dwi Prihartono; Thomas Sri Widodo; Suhardjo Suhardjo; Adhi Susanto