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INDONESIA
Jurnal Sains Dasar
Published by Universitas Negeri Yogyakarta
ISSN : 20859872     EISSN : 24431273     DOI : 10.21831
Core Subject : Education,
Education
Arjuna Subject : -
Articles 3 Documents
 1 
Search results for , issue " Vol 4, No 2 (2015): Jurnal Sains Dasar" : 3 Documents clear
SPECIES INVENTORY OF AMPHIBIOUS FISH IN INTERTIDAL ZONE OF NGRENEHAN, NGOBARAN AND NGUYAHAN COASTELS, GUNUNG KIDUL, YOGYAKARTA Sukiya, Sukiya; Putri, Rizka Apriyani
Jurnal Sains Dasar Vol 4, No 2 (2015): Jurnal Sains Dasar
Publisher : Yogyakarta State University

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Abstract

Tropical region is high on faunal diversity including vertebrates and invertebrates. Research on diversity of amphibious fish in Intertidal zone of  Yogyakarta southern coast is still limited so there is no complete records regarding these unique fish. This research aimed to know the diversity of amphibious fish in three beaches of Yogyakarta southern coast, namely pantai Ngrenehan, Ngobaran dan Nguyahan. Fish sampling were conducted using random sampling method combined with observational method. Fish were collected using small nets then identified to species rank. The total length of each fish were measured and recorded. Few individuals of the same species were sacrificed as voucher specimens. The result showed that in pantai Ngrenehan, Ngobaran, and Nguyahan, five different species of amphibius fish were found, which are Cabillus lacertops, Bathygobius fuscus, Enneapterygus sp., Blenniella cyanostigma, and Blenniella caudolineata. Cabillus lacertops was found in all of sampling locations. Enneapterygus sp. was found in pantai Nguyahan while Bathigobius fuscus, and Blenniella caudolineata can only be found in pantai Ngrenehan. Further studies regarding the adaptation, ecological features, taxonomy and biological reproduction of Yogyakarta southern coast’s  amphibious fish are still needed. Keywords: Inventarization, amphbious fish, intertidal zone, Yogyakarta southern coast
DISTRIBUTION OF PARASTATISTICS FUNCTIONS: AN OVERVIEW OF THERMODYNAMICS PROPERTIES SYL, Isana; Yuanita, Dewi; Pratomo Al, Heru
Jurnal Sains Dasar Vol 4, No 2 (2015): Jurnal Sains Dasar
Publisher : Yogyakarta State University

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Abstract

Water is abundant on Earth, so its utilization as an energy source makes its own challenges. Water molecules can be reacted into hydrogen and oxygen gasses in various ways. Hydrogen gas is an environmentally friendly fuel, reliable substitution for fossil fuel which is depleting within time, so the efforts relating to the provision of renewable energy needs support from various parties. Electrolysis is a well known process, which is one of the ways to react the water molecule into hydrogen and oxygen gas, but it has low effectiveness generally. Therefore, it is necessary to have the efforts increasing the effectiveness of electrolysis process, both in terms of electrodes and the electrolyte used. This study had conducted on base condition with NaHCO3 addition, on dahlia tuber starch media, and using working electrode stainless steel and stainless steel/Fe-Co-Ni. The method of research  was using linear and cyclic voltammetry using eDAQEChem voltammeter apparatus, which is able to describe the flow of voltage and current used within electrolysis process. The existence of dahlia tuber starch leads to cover the surface of the electrode so that the process of water molecules reaction becomes obstructed. It is obtained that the optimum covering of electrode surface is achieved in the addition of 9 grams of dahlia tube starch in one liter of water.Keywords: water molecule dissociation reaction, voltammograms, dahlia tuber starch, stainless steel, covering
PARALLEL COORDINATE APPLICATION IN 4 DIMENSION ROOM AT PLANE TRAFFIC DISPLAY Hartono, Hartono; Krisnawan, Kus Prihantoso; Arifah, Husna
Jurnal Sains Dasar Vol 4, No 2 (2015): Jurnal Sains Dasar
Publisher : Yogyakarta State University

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Abstract

This research aims to describe ann-dimensional line on a parallel coordinate and uses the representation as a display of aircraft motion which flies at a straight line and constant velocity. A parallel coordinate of n-dimensional space depicted in the form of nparallel vertical lines which represent axis.Every two adjacent axes have the same distance. A horizontal line that cutsall axes indicates the initial pointsof each axis. In a parallel coordinate,an 15n"> -dimensional point is represented as a polygonal chainwhere the vertices located on its axis. Based on the representations of some of collinear points, a line is described on a parallel coordinate. On the other hand, one can consider a graph of an aircraft motion as a graph of a 4-dimensional space. At a constant speed with a straight line orbit, the graph of an aircraft movementis a graph of 4-dimensional line. The result shows that, on a parallel coordinate, an n-dimensional line represented as 15n-1">  dots. As a consequence, the graph of an aircraft that moveat a constant speed with a straight line orbitrepresented as3 dots. By this representation, the coordinate and altitude of the aircraft can be observes at anytime. It also shows whether the movement of an aircraft disturb (strike or too close to) another plane or not. Keywords: parallel coordinate, n-dimensional space, aircraft movement display

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