Judul: Analysis of Contruction Indonesian Sentence Graph Using Knowledge Graph
Abstrak: The syntactic analysis of a language has an advantage as compared to the semantic analysis in terms of the time used to process the language, that is faster than semantic analysis. But, if the syntactic analysis is not followed by its semantic analysis it tends to cause ambiguity. For example is an Indonesian sentence kucing memakan tikus mati. In Indonesian, this sentence has an ambiguity whether the cat died after eating the rat or the rat has died eaten by the cat. Therefore, semantic analysis is needed to explain the meaning of this sentence. In such a case the method of knowledge graph can be used to explain the meaning of the sentence. This method is a new approach for natural language understanding. There are 9 binary relationships and 4 frame relationships as components of the knowledge graph. Using this method, a word is represented by a word graph, and a sentence is represented by a sentence graph. Analyzing the sentence using knowledge graph needs a chunking rule. This rule has already existed in the structure of English and Chinese, but it has not existed in Indonesian yet. The objective of this research is to constructs a chunking rule in Indonesian sentences and a sentence graph in Indonesian with the knowledge graph method. The benefits of this research is to provide the rules of constructing Indonesian sentence graph and to create an Indonesian sentence graph. The result of this research is Indonesian chunking rule with 8 indicators, they are comma and period sign, pronoun, adverb, preposition, jumps, logic words, interlude of breath, and conjunction. The other result is Indonesian sentences graph that describes semantics aspect of the sentence.
Keyword: knowledge graph, sentence graph, chunk graph, chunk indicators

Judul: Kontraksi pola graf klausa Bahasa Indonesia menggunakan metode knowledge graph
Abstrak: Knowledge graph is a new method of knowledge representation. In principle, knowledge graph consists of concept and relationship. There are already rules of constructing wordgraphs of noun, verb, adverb, adjective, preposition, and phrase. However to be able to represent the meaning of Indonesian text we still need other rules to represent clause and sentence. This research is mainly focused on constructing a subordinative clause graph and building rules of subordinative clause graph formation. In this research, subordinative clause is classified by analyzing the subordinative relationship (time, condition, if-relation, purpose, consessive, resemblace, because-relation, result, way-relation, tool-relation, complementation, attributive, equative, and comparative) and the structure of clause (the combination of subject, predicate, object, complement, and description). After the result of constructing subordinative clause graph is analyzed and formulated, the subordinative clauses are classified based on the same conjunction graph pattern and clause structure graph pattern, and we get 13 conjunction graph patterns and 48 clause structure graph patterns for subordinative clause in Indonesian.
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Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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