EKSAKTA: Journal of Sciences and Data Analysis
Ekstakta is an interdisciplinary journal with the scope of mathematics and natural sciences that is published by Fakultas MIPA Universitas Islam Indonesia. All submitted papers should describe original, innovatory research, and modelling research indicating their basic idea for potential applications. The Journal particularly welcomes submissions that focus on the progress in the field of mathematics, statistics, chemistry, physics, biology and pharmaceutical sciences.
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<![CDATA[Development of Stages of The Implementation of The Environmental Monitoring Program ]]>
<![CDATA[Rahimova Nazila]]>;
<![CDATA[Abdullayev Vugar]]>;
<![CDATA[Abbasova Vasila]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art3
<![CDATA[The object of the research is environmental monitoring, which allows to present the current situation about the environment. The monitoring program aims to gather information for the decision-making process. This article describes environmental monitoring and highlights its main goals and objectives. This article describes the properties of the environmental monitoring object. The main components of environmental monitoring are also considered here. The database and analytical data-processing tools are main components of environmental monitoring. In addition, this article considers the structure of environmental monitoring. Next, environmental monitoring functions were considered. This article also provided a classification of monitoring systems. One problem is the development of the most appropriate algorithm for implementing environmental monitoring. The article is devoted to the development of software modules of environmental information systems that perform geographic and environmental data processing. There are software modules designed for centralized operation of data (data entry, editing, deleting, etc.), the conceptual types of GIS, the goals and functions of environmental monitoring, and these are taken into account in the existing system. The monitoring system should also have a good search tool, which is also described in this article. The search tool is described using SQL and Delphi. The research used decision-making methods. This article describes the stages of development of an environmental monitoring program. The research identified the inputs and outputs of the environmental monitoring programme, as well as its objects and the relationship between them. The results obtained in the future will be useful for improving the decision-making of authorized persons.]]>
<![CDATA[Adsorption Studies of Rice Husk-Based Silica/Carbon Composite ]]>
<![CDATA[Wara Dyah Pita Rengga]]>;
<![CDATA[Wahyudi Budi Sediawan]]>;
<![CDATA[Nadya Alfa Cahaya Imani]]>;
<![CDATA[Harianingsih Harianingsih]]>;
<![CDATA[Kega Amalania Salsabiil]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art1
<![CDATA[Rice husk as a by-product of the rice milling process is a material that can still be processed to be a product that can be used in various applications. The potential for the commercialization ofrice husks is still hampered by its low economic value. By using the heating method using an inert gas, rice husk can be converted into a composite which contains mostly silica and carbon, a wellknown component with excellent adsorbent properties. This aimed to study the preparation of rice husk-baased silica/carbon composite and its adsorption behavior. In this research, the utilization of rice husk into silica/carbon composites was done by using three different methods. Common heating under temperature of 800 oC, heating process under temperature of 800 oC using furnace equipped with inert gas, and heating process under temperature of 800 oC using furnace equipped with inert gas with addition of glucose solution were carried out in order to obtain three different kinds of composite. Analysis and characterization using were performed to observe the properties of the composites. As the result, from Fourier Transform Infra-Red and X-Ray diffraction characterizations, silica/carbon composites were successfully made as both of carbon and amorphous silica spectra appeared in the result. Furthermore, composite made under temperature of 800 oC using furnace equipped with inert gas with addition of glucose solution has the highest adsorption capacity and Langmuir’s model adsorptive behavior with R2 value of 0.935.]]>
<![CDATA[Generalised Difference Sequence Space of non-absolute Type ]]>
<![CDATA[A.H. Ganie]]>;
<![CDATA[S. A. Lone]]>;
<![CDATA[A. Afroza]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art9
<![CDATA[It was Shiue [16] who have introduced the Cesaro spaces of the type Cesp and Ces1.In view of Chiue, we shall introduce and study some properties of generalised Cesaro difference sequence space. We also examine some of their basic properties viz., BK property and some inclusions relations will be taken care of.]]>
<![CDATA[Contribution Succinonitrile Additive for Performa LiTFSi Solid Polymer Electrolytes for Li-Ion Battery ]]>
<![CDATA[Qolby Sabrina]]>;
<![CDATA[Titik Lestariningsih]]>;
<![CDATA[Christin Rina Ratri]]>;
<![CDATA[Achmad Subhan]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art2
<![CDATA[The purpose of this study is to evaluate the performance of Solid Polymer Electrolyte (SPE) which has the role of replacing liquid electrolyte in the battery system to reduce leakage. Evaluation of electrochemical SPE consisted of mixture lithium salt, solid plasticizer, and polymer precursor with different ratio. Impedance spectroscopy was used to investigate ionic conduction and dielectric response lithium bis(trifluoromethane)sulfony imide (LiTFSI) salt, and additive succinonitrile (SCN) plasticizer. The result showing enhanced high ionic conductivity. In half-cell configurations, wide electrochemical stability window of the SPE has been tested. The great potential of SPE for applications in lithium-ion batteries can be seen from the ability of window stability at room temperature. Additive SCN contributes to forming pores that make it easier for the Li-ion to move from the anode to the cathode and vice versa for better perform SPE. Pore of SPE has been characterization with FE-SEM. Additive 50% w.t SCN shows the best ionic conductivity with 4.2 volt wide stability window and pretty much invisible pores.]]>
<![CDATA[Grinding Technique on Synthesis of Calixarene and Its Derivatives ]]>
<![CDATA[Susy Yunita Prabawati]]>;
<![CDATA[Afifah Mufidati]]>;
<![CDATA[Titis Ratna Djuwita]]>;
<![CDATA[Siti Nur Ngaini]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art4
<![CDATA[The synthesis of p-t-butylcalix[6]arene (PK[6]A) and calixresorcinarene derivative compounds, namely C-para-dimethylamino-phenylcalix[4]resorcinarene (CPDAK[4]R) and C-4-hydroxy-phenylcalix[4]-resorcinarene (CHK[4]R), had been carried out by grinding technique. The grinding technique was done with the absence of solvents so that it minimized the waste. Synthesis occurred through electrophilic substitution reactions with KOH as an alkaline catalyst and p-toluene sulfonic acid as an acid catalyst. The three calixarene products were in the form of crystalline solids with a melting point of more than 300°C, insoluble in water with yields of 62.58; 61.94 and 97.49%, respectively. Product characterization using FTIR analysis showed the vibration of the methylene bridge (-CH2-) at a wavenumber of 1473.62 cm-1 and LC-MS analysis for (PK[6]R) showed that the molecular weight was 974.77 g/mole. While the analysis of (CPDAK[4]R) and (CHK[4]R) with 1H NMR showed the presence of protons from the methine bridge (-CH-) that appear at the chemical shift of 4.950 and 3.078 ppm.]]>
<![CDATA[Grinding Technique on Synthesis of Calixarene and Its Derivatives ]]>
<![CDATA[Prabawati, Susy Yunita]]>;
<![CDATA[Mufidati, Afifah]]>;
<![CDATA[Ratna Djuwita, Titis]]>;
<![CDATA[Ratna Djuwita, Titis]]>;
<![CDATA[Nur Ngaini, Siti]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art4
<![CDATA[The synthesis of p-t-butylcalix[6]arene (PK[6]A) and calixresorcinarene derivative compounds, namely C-para-dimethylamino-phenylcalix[4]resorcinarene (CPDAK[4]R) and C-4-hydroxy-phenylcalix[4]-resorcinarene (CHK[4]R), had been carried out by grinding technique. The grinding technique was done with the absence of solvents so that it minimized the waste. Synthesis occurred through electrophilic substitution reactions with KOH as an alkaline catalyst and p-toluene sulfonic acid as an acid catalyst. The three calixarene products were in the form of crystalline solids with a melting point of more than 300°C, insoluble in water with yields of 62.58; 61.94 and 97.49%, respectively. Product characterization using FTIR analysis showed the vibration of the methylene bridge (-CH2-) at a wavenumber of 1473.62 cm-1 and LC-MS analysis for (PK[6]R) showed that the molecular weight was 974.77 g/mole. While the analysis of (CPDAK[4]R) and (CHK[4]R) with 1H NMR showed the presence of protons from the methine bridge (-CH-) that appear at the chemical shift of  4.950 and 3.078 ppm.]]>
<![CDATA[Finding Minimum Distance on Birkhoff-James Orthogonality in Banach Space ]]>
<![CDATA[Susilo Hariyanto]]>;
<![CDATA[Titi Udjiani]]>;
<![CDATA[Yuri C Sagala]]>;
<![CDATA[Muhammad Rafid Fadil]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art5
<![CDATA[In this paper we define orthogonality concept on Banach space. That is called Birkhoff-Jamesorthogonality. Some new problem about the correlation of orthogonality between Hilbert space and Birkhoff-James were discussed. Correlation investigated by using particular norm. In other side, correlation of minimum distance in Banach space and Birkhoff-James orthogonality also discussed, by generalizing minimum distance in Hilbert space ]]>
<![CDATA[Analysis of Tools for The Description and Analytical Processing of Enviromental Data ]]>
<![CDATA[Ragimova N.A]]>;
<![CDATA[Abdullayev V.H.]]>;
<![CDATA[Khalilov M.E.]]>;
<![CDATA[Abuzarova V.A.]]>;
<![CDATA[Askerov T.K.]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art6
<![CDATA[The objects of the research are tools that support the description and analytical processing of environmental data requests. These tools are used for environmental monitoring. Analytical processing of environmental data is necessary for this monitoring by the persons concerned. Here, a star schema is used to describe the data. Analytical data processing tools are required for analysis and research of environmental data. The results of analytical processing of environmental data are used to speed up decision-making. This article also describes the structure of the analytical data processing tool. Therefore, one of the problem points is how to describe the data. For this purpose, an environmental data relay scheme is defined, and the data description is implemented in multidimensional cubes. Due to the growth of data volume, data processing is carried out using multi-dimensional visualization methods. In addition, a visual user interface has been created for analytically processing queries based on scale data. The result of this research is to find a method for describing environmental data. At the end of the research, a hypercube was obtained, with the help of which it was possible to structure environmental data and carry out analytical processing of them. To this end, environmental data have been described using a multi-dimensional visualization method. And OLAP technologies were used to carry out analytical processing of this data. OLAP technologies allow aggregate data to be used and presented as a hypercube. The results of the research can be used as a basis for an environmental information system that is used for environmental monitoring.]]>
<![CDATA[Catalytic Synthesis of Diethanolamide Surfactant from Used Cooking Oil ]]>
<![CDATA[Maisari Utami]]>;
<![CDATA[Karna Wijaya]]>;
<![CDATA[Akhmad Syoufian]]>;
<![CDATA[Satyagraha Hakim Wicaksono]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art7
<![CDATA[The synthesis of diethanolamide surfactant from used cooking oil was systematically studied using modified zeolite as catalyst. The activated zeolite was obtained by dispersing natural zeolite in sulfuric acid (H2SO4) solution. Potassium carbonate (K2CO3) was loaded into activated zeolite by wet impregnation method. The methyl ester obtained from transesterification reaction of used cooking oil was refluxed with diethanolamine (C4H11NO) solution over K2CO3/zeolite catalyst in the production of diethanolamide surfactant. The amidiation reaction over K2CO3/zeolite effectively produced 92% of diethanolamide surfactant with the highest selectivity of methyl oleate. Diethanolamide surfactant showed stable foam and emulsion with the reduction of surface tension as much as 3.3 dyne/cm.]]>
<![CDATA[Lie Symmetry and Lie Bracket in Solving Differential Equation Models of Functional Materials: A Survey ]]>
<![CDATA[Edi Kurniadi]]>;
<![CDATA[Asep Supriatna]]>
<![CDATA[ EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 2, August 2020 ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam ]]>
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DOI: 10.20885/EKSAKTA.vol1.iss2.art10
<![CDATA[Functional materials are becoming an increasingly important part of our daily life, e.g. they used for sensing, actuation, computing, energy conversion. These materials often have unique physical, chemical, and structural characteristic involving very complex phase. Many mathematical model have been devised to study the complex behavior of functional materials. Some of the models have been proven powerful in predicting the behavior of new materials built upon the composites of existing materials. One of mathematical methods used to model the behavior of the materials is the differential equation. Very often the resulting differential equations are very complicated so that most methods failed in obtaining the exact solutions of the problems. Fortunately, a relatively new approach via Lie symmetry gives a new hope in obtaining or at least understanding the behavior of the solutions, which is needed to understand the behavior of the materials being modeled. In this paper we present a survey on the use of Lie symmetry and related concepts (such as Lie algebra, Lie group, etc) in modeling the behavior of functional materials and discuss some fundamental results of the Lie symmetry theory which often used in solving differential equations. The survey shows that the use of Lie symmetry and alike have been accepted in many field and gives an alternative approach in studying the complex behavior of functional materials.]]>
