3d Hologram Pengenalan Hewan Nusantara

Indonesia merupakan negara yang kaya. Salah satu contohnya adalah keanekaragaman fauna yang hidup di Indonesia. Keanekaragaman fauna Indonesia dibuktikan dengan adanya berbagai macam fauna khas dari setiap daerah atau pulau di Indonesia. Namun kini fauna khas itu mulai langka akibat banyaknya perburuan dan perdagangan satwa liar yang terjadi. Selain itu minimnya pengetahuan masyarakat akan fauna khas tersebut menjadikan kurangnya kesadaran masyarakat untuk ikut menjaga kelestariannya. Oleh karena itu dibutuhkan sebuah edukasi yang menyenangkan untuk meningkatkan pengetahuan masyarakat mengenai fauna khas Indonesia. 3D Hologram Pengenalan Hewan Nusantara adalah sebuah 3D hologram tentang edukasi mengenai fauna khas Nusantara berbasis android. Dengan adanya 3D Hologram Pengenalan Hewan Nusantara, diharapkan mampu membuat pengguna lebih mengenali fauna khas Nusantara, serta memberikan kesadaran bahwa keanekaragaman alam khusunya fauna khas yang ada di Indonesia sangat beragam dan akan hilang keberadaannya bila tidak dilestarikan. Dari hasil pengujian didapatkan bahwa 3D Hologram Pengenalan Hewan Nusantara mampu memberikan informasi dan pengetahuan kepada pengguna atau pemain mengenai fauna khas Nusantar

Estimation of data memory capacity for circularly polarized synthetic aperture radar onboard unmanned aerial vehicle platform (CP-SAR UAV)

Previously only linear polarization is widely used in the Synthetic Aperture Radar(SAR) system onboard spaceborne and airborne platforms. In such linearly polarized SAR(LP-SAR) systems, Faraday rotation in the ionosphere and platform posture will contribute tothe system noise. Therefore to improve this situation, currently a novel Circularly PolarizedSynthetic Aperture Radar (CP-SAR) sensor is developed in Microwave Remote SensingLaboratory, Chiba University. Moreover, from this research, a new backscattering data basedon circularly polarized wave in the remote sensing field can be obtained. As an early stage ofthe development of this CP-SAR sensor, we built an Unmanned Aerial Vehicle (UAV)platform for testing CP-SAR sensor capabilities. In this paper, we describe the novel CP-SARsensor and the method to design CP-SAR UAV especially in estimating the requirement ofdata memory capacity. Also a smaller antenna is possible to be implemented since the 3-dBaxial ratio on antenna characteristic becomes the main parameter in this new CP-SARtechnique. Hence, a compact CP-SAR sensor onboard a small and low cost spaceborneplatform yielding a high accuracy SAR image data can be realized in the near future

Wave overtopping at near-vertical seawalls: Influence of foreshore evolution during storms

This work presents the results of an investigation on how wave overtopping at a near-vertical seawall at the back of a sandy foreshore is influenced by sequences of erosive storms. The experiments were carried out in the Large Wave Flume (GWK) at Leibniz University, Hannover (Germany). The tested layout consisted of a near-vertical 10/1 seawall and a sandy foreshore with an initial 1/15 slope. Three sequences of idealised erosive storms were simulated. Within each storm both the incident wave conditions and still water level were varied in time to represent high and low tide conditions. Each sequence started from a 1/15 configuration and the beach was not restored in between storms. The measurements included waves, beach profile, wave overtopping volumes. The profile of the beach was measured after each sea state tested. Wave overtopping at each stage of the tested storms was significantly influenced by bed changes. This was linked to the measured evolution of the beach. Measurements showed that a barred profile developed quickly at the start of each sequence, and scour developed at the toe of the structure during high water level conditions, while accretion or partial backfilling developed during low water level conditions. Due to these processes, the position of a sea state in the tested sequence is shown to be an important factor in determining the wave overtopping volume. Remarkably, when a weaker idealised storm followed a more energetic one, nearly the same level of overtopping was recorded. This is explained by the foreshore erosion, leading to increased water depths and wave heights at the toe of the structure. This finding allows to quantify and to explain the variability of wave overtopping in storms following one another at intervals shorter than the recovery time of the foreshore.Rivers, Ports, Waterways and Dredging Engineerin