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"Electromagnetic vibration energy harvesting devices introduces an optimization approach which is applied to determine optimal dimensions of the components (magnet, coil and back iron). Eight different commonly applied coupling architectures are investigated. The results show that correct dimensions are of great significance for maximizing the efficiency of the energy conversion. A comparison yields the architectures with the best output performance capability which should be preferably employed in applications. A prototype development is used to demonstrate how the optimization calculations can be integrated into the design?flow. Electromagnetic vibration energy harvesting devices targets the designer of electromagnetic vibration transducers who wishes to have a greater in-depth understanding for maximizing the output performance."

"This paper reports on the magnetic properties and electromagnetic characterization of La0.8Ba0.2FexMn½(1-x)Ti½(1-x)O3 (x = 0.1–0.8). The La0.8Ba0.2FexMn½(1-x)Ti½(1-x)O3 (x = 0.1–0.8) materials were prepared using a mechanical alloying method. All the materials were made of analytical grade precursors of BaCO3, Fe2O3, MnCO3, TiO2, and La2O3, which were blended and mechanically milled in a planetary ball mill for 10h. The milled powders were compacted and subsequently sintered at 1000°C for 5h. All the sintered samples showed a fully crystalline structure, as confirmed using an X-ray diffractometer. It is shown that all samples consisted of LaMnO3 based as the major phase with the highest mass fraction up to 99% found in samples with x < 0.3. The mass fraction of main phase in doped samples decreased in samples with x > 0.3. The hysteresis loop derived from magnetic properties measurement confirmed the present of hard magnetic BaFe12O19 phase in all La0.8Ba0.2FexMn½(1-x)Ti½(1-x)O3 (x = 0.1–0.8) samples. The results of the electromagnetic wave absorption indicated that there were three absorption peaks of ~9 dB, ~8 dB, and ~23.5 dB, respectively, at respective frequencies of 9.9 GHz, 12.0 GHz, and 14.1 GHz. After calculations of reflection loss formula, the electromagnetic wave absorption was found to reach 95% at the highest peak frequency of 14.1 GHz with a sample thickness of around 1.5 mm. Thus, this study successfully synthesized a single phase of La0.8Ba0.2FexMn½(1-x)Ti½(1-x)O3 (x = 0.1–0.8) for the electromagnetic waves absorber material application."

"Metode virtual assembling atau perakitan berbasis virtual merupakan salah satu pengembangan metode mengikuti perkembangan teknologi dunia manufaktur termutakhir. Virtual assembling memungkinkan pelaku industri perakitan untuk dapat merakit suatu benda produksi dengan menggunakan gestur tangan yang nyata sebagaimana yang dilakukan bila wujud fisik benda tersebut ada dihadapannya. Seiring perkembangan ide ini, terdapat beberapa jenis sub-metode perantara antara manusia, dalam hal ini yang bertindak sebagai penggunanya, dengan interface perangkat lunak di komputer. Salah satunya adalah menggunakan sarung tangan yang dilengkapi dengan flex sensor sebagai sensor pembacaan data. Flex sensor ialah sensor yang mengubah resistansi sesuai dengan besarnya kebengkokan yang diberikan. Sarung tangan yang dilengkapi flex sensor bekerja secara independen yang memungkin penggunanya lebih leluasa dalam melakukan virtual assembling. Penelitian ini bertujuan sebagai kajian mendalam penggunaan flex sensor dalam data glove dari beberapa aspek yakni karakterisasi kalibrasi, keakurasian, metode pengambilan data, dan metode kalibrasi data glove.

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Virtual assembling method is one of the developments of advanced manufacturing technology. It allows modern manufacturing industry to be able to assembly products using real-time hand gestur has been done in real manufacturing process with real physical appearance of the product. Along its development of the idea, some sub-methods are made as the intermediary of human-machine interaction. One of it is using flex sensors embedded on hand glove. Flex sensor is sensor that changes resistance according to the magnitude of bend done by the users. They convert the change in bend to electrical resistance ? the ore the bend, the more the resistance value. The objective of this project is to have further study regarding to the usage of flex sensors on motion glove from several aspects: calibration characterization, accuracy of various hand size, data acquisition method, and motion glove?s calibration method."