Judul: Penggunaan Teori Knowledge Graph untuk Merangkum Teks Berbahasa Indonesia
Abstrak: A terminology may have many descriptions from different interpretation. Various descriptions of the terminology could result on an ambiguity of knowing the meaning of the terminology (interpretation). For that matter there is a need to combine and summarize all those descriptions into one concise meaning. Knowledge graph method can be use for such a case. Knowledge graph is a new method in Natural Language Processing (NLP). By using knowledge graph method, those many descriptions can be made into many description graphs and then can be combined into one graph describing the meaning of the terminology. The result of this research is a summary ofa terminology that have many description and a slllllmarization rules that can be used generally for other terminology in Indonesian language
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Judul: Abstraksi teks berbahasa Indonesia menggunakan teori knowledge graph
Abstrak: Text summarization system has been developed in order to select several sentences based on certain criteria. However, this method tends to omit some informations contained in unselected sentences. Therefore, a system is needed to get a text abstraction, which represents the whole informations contained in the original text. Knowledge graph offers the way to built such system. Knowledge Graph is a new method in Natural Language Processing (NLP) that represents a knowledge in a form of graph. Using this method, every sentence in the full text version can be represented into graphs which can be further analyzed and gathered into a single graph that describes the meaning of the full text. The result of this research is a procedure to implement knowledge graph theory to get an abstraction of the text.
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Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell