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( Encarnacion Sanchez Garcia ) 고려대학교 스페인·라틴아메리카연구소 2010 스페인라틴아메리카연구 Vol.3 No.-
Perteneciente al genero de las narraciones de viajes, la obra del sacerdote Pedro Cubero Sebastian Peregrinacion del mundo(Napoles, Carlos Porsile, 1682) es una de las primeras de la literatura occidental que cuenta un viaje global siguiendo un itinerario en direccion oeste-este, con particular atencion a las regiones asiaticas. Las razones apostolicas de la vuelta al mundo de Cubero Sebastian definen el trayecto y las etapas del periplo y su caracter religioso connota el valor del texto. A partir de un cotejo previo, el articulo describe las varias versiones de la obra, correspondientes a las distintas ediciones: una anterior a la napolitana(Madrid, Juan Garcia Infancon, 1680) y otra posterior(Zaragoza, Pasqual Bueno, 1688); su traduccion al italiano(Napoli, Carlo Porsile, 1683) demuestra el interes despertado por el libro en Italia. La autora se detiene ademas en las circunstancias que explican la edicion napolitana en lengua castellana de la Peregrinacion del mundo, de la que estudia sus aspectos textuales y paratextuales: el ambiente cultural de la corte virreinal apoya esa segunda edicion de la obra mejorando el equilibrio del material narrativo y la calidad del producto editorial; el estudio concluye con una valoracion comparada de la Peregrinacion del mundo con un texto de tan extraordinaria fortuna editorial como el Giro del mondo de Giovan Francesco Gemelli Careri(Napoles, Rayllard, 1699), en cuya gestacion seguramente influyo.
Encarnacion, Nico,Yang, Hyunho The Korea Institute of Information and Commucation 2014 Journal of information and communication convergen Vol.12 No.2
The field of body sensor networks has attracted interest of many researchers due to its potential to revolutionize medicine. These sensors are usually implanted inside the human body and communicate among themselves. In the process of receiving, processing, or transmitting data, these devices produce heat. This heat damages the tissues surrounding the devices in the case of prolonged exposure. In this paper, to reduce this damages, we have improved and evaluated two protocols-the least temperature routing protocol and adaptive least temperature routing protocol-by implementing clustering as well as a leadership rotation algorithm. We used Castalia to simulate a basic body area network cluster composed of 6 nodes. A throughput application was used to simulate all the nodes sending data to one sink node. Simulations results shows that improved communication protocol with leadership rotation algorithm significantly reduce the energy consumption as compared to a scheme without leadership rotation algorithm.
A Simple Energy Harvesting Algorithm for Wireless Sensor Networks
Encarnacion, Nico N.,Yang, Hyunho The Korea Institute of Information and Commucation 2012 Journal of information and communication convergen Vol.10 No.4
Harvesting energy from the environment is essential for many applications to slow down the deterioration of energy of the devices in sensor networks and in general, the network itself. Energy from the environment is an inexhaustible supply which, if properly managed and harvested from the sources, can allow the system to last for a longer period - more than the expected lifetime at the time of deployment, or even last indefinitely. The goal of this study is to develop a simple algorithm for ns-2 to simulate energy harvesting in wireless sensor network simulations. The algorithm is implemented in the energy module of the simulator. Energy harvesting algorithms have not yet been developed for ns-2. This study will greatly contribute to the existing knowledge of simulating wireless sensor networks with energy harvesting capabilities in ns-2. This paper will also serve as a basis for future research papers that make use of energy harvesting.
Encarnacion, Nico N.,Yang, Hyun-Ho The Korea Institute of Information and Commucation 2012 Journal of information and communication convergen Vol.10 No.3
Tree-based structures offer assured optimal paths from the data source to the sink. Shortest routes are disregarded since these do not consider the remaining energy level of the nodes. This shortens the lifetime of the whole network. Most tree-based routing protocols, although aware of the nodes' energy, do not consider an energy aware sleep scheduling scheme. We propose an energy-aware sleep scheduling (EASS) scheme that will improve the sleep scheduling scheme of an existing tree-based routing protocol. An energy harvesting structure will be implemented on the wireless sensor network. The depth of sleep of every node will be based on the harvested energy.
Context-Aware Mobile Gateway Relocation Scheme for Clustered Wireless Sensor Networks
Encarnacion, Nico N.,Yang, Hyunho The Korea Institute of Information and Commucation 2012 Journal of information and communication convergen Vol.10 No.4
In recent years, researchers have been attracted to clustering methods to improve communication and data transmission in a network. Compared with traditional wireless networks, wireless sensor networks are energy constrained and have lower data rates. The concept of implementing a clustering algorithm in an existing project on gateway relocation is being explored here. Low energy adaptive clustering hierarchy (LEACH) is applied to an existing study on relocating a gateway. The study is further improved by moving the gateway to a specific cluster based on the number or significance of the events detected. The protocol is improved so that each cluster head can communicate with a mobile gateway. The cluster heads are the only nodes that can communicate with the mobile gateway when it (the mobile gateway) is out of the cluster nodes' transmission range. Once the gateway is in range, the nodes will begin their transmission of real-time data. This alleviates the load of the nodes that would be located closest to the gateway if it were static.
Java Thread를 이용한 무선 센서 노드 에너지 수확 시뮬레이터
니코엔카나시온 ( Nico Encarnacion ),양현호 ( Hyunho Yang ) 한국인터넷정보학회 2013 인터넷정보학회논문지 Vol.14 No.2
주변 환경으로부터 에너지를 수확하는 것은 많은 응용 분야에서 센서네트워크의 에너지를 고갈시키는 상황을 완화시키는 데 필수적이다. 주변환경으로부터 얻을 수 있는 에너지는 적절하게 관리되고 수확된다면 시스템을 더욱 오랫동안 지속할 수 있게 한다. 이제까지 많은 시뮬레이터 들은 전원을 에너지 수확에 의존하는 센서네트워크를 시뮬레이션 하였다. 노드들이 에너지를 다양한 주변에너지원으로부터 수확한다고 가정하고 시뮬레이션을 할 수 있다는 것은 매우 중요한 일이다. 또한, 에너지의 잔량을 지속적으로 추적하고 이에 따라 노드의 활동을 조정하는 것도 필수적이다. 본 연구의 목적은 각기 다른 에너지원에 따른 에너지 수확의 효과를 보여주는 단일 노드 시뮬레이터를 제안하는 것이다. 본 연구의 결과는 향후 더욱 정교한 시뮬레이션을 위하여 확장이 가능 하다. Harvesting energy from the environment is essential for many applications to slow down the deterioration of energy in sensor networks. Energy from the environment is an inexhaustible supply which, if properly managed and harvested from the sources, can allow the system to last for a longer period. Many simulators simulate whole sensor networks where the nodes rely on energy harvesting for their source of power. It is important to be able to assume and simulate a node that can harvest energy from different sources of ambient energy. It is also essential to be able to keep track of the energy levels of the node and adjust node activities based on its energy status. This study aims to develop a prototype for a single node simulator that will show the effects of harvesting from different sources of energy. The results of this study can later be extended for more complicated simulations.
Jade Dhalle Encarnacion,박상준,고영수 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.2
Me2Si(2-Me-4-phInd)2ZrCl2 supported on SiO2/MgCl2 binary support was prepared for the preparation of heterophasic copolymer of polypropylene. The bi-support underwent surface treatment with various alkyl aluminum compounds such as trimethylaluminum (TMA), triethylaluminum (TEAL), and triisobutylaluminum (TIBA) before supporting the metallocene catalyst for 3 or 24 hours and were used for homopolymerization. It was notable that the generated SiO2/MgCl2 bi-support had lower surface area, pore volume and size as compared to the conventional SiO2. Impact polypropylene copolymers (IPCs) were obtained using two-step polymerization in one reactor with the presence of metallocene catalyst supported on SiO2. Propylene was polymerized in the reactor to produce the iPP matrix followed by polymerization of ethylene resulting to heterophasic material. It is apparent that the molecular weight of the polymer increased with longer PE polymerization time and as the polymerization time was more than 40 min, PP peak appeared near 147.9-149.2 oC, and a new peak emerged at 116.9-119.9 oC which could be attributed to the melting temperature of iPP crystallites and a less intense peak to either chains of ethylene-propylene copolymers. SEM images also confirmed that spherical PE particles were deeply embedded in the crystalline PP matrix and a large amount was produced as the polymerization time of the second stage ethylene polymerization was increased.