Surabaya, Indonesia

State University of Surabaya

www.unesa.ac.id
Surabaya, Indonesia

The State University of Surabaya was formerly named IKIP Surabaya is one of the state universities that was specially designed for graduating teachers, qualified for preschool, elementary, junior high, and senior high. In 1999, IKIP Surabaya changed its name to State University of Surabaya and has two main goals: graduate education and non-education students. It has seven faculties and one graduate school, 47 undergraduate programs, 12 diploma programs, and 15 postgraduate and doctorate programs. It has approximately 24,986 students and 834 lecturers . Wikipedia.

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Marniati,State University of Surabaya
AIP Conference Proceedings | Year: 2016

The research reveals the influence of entrepreneurship learning results and productive training on entrepreneurship motivation. This research was conducted in the context of the Vocational High School, which is a class XI student of SMK at 65 publics and privates accredited A, B, and C SMK of East Java. Research sample is a number of 340 students from 18 SMK defined by stratified random sampling. The analytical model used in this study is a SEM (Equation Structural Modeling) with AMOS 20 (Analysis Moment of Structural) software to measure the relationship between variables. The results of the study showed that (1) there is a significant relationship between learning results of entrepreneurship subject with entrepreneurship motivation, (2) there is a significant relationship between learning results of productive training subject with entrepreneurship motivation. The analysis of structural models reveals there are strong entrepreneurship motivation is indicated by the presence of: (1) a sense of responsibility and (2) the desire to go forward (advancement) on students as the main pillars of learning success in the productive training subject. The combination of both contributed a great deal to make students eager to have high entrepreneurship motivation. Entrepreneurial learning results indicated by the three main things: (1) the student has a high orientation on the action, (2) students are more courageous in taking risks, and (3) students become more creative. While on productive training, students participating in clothing productive practices is getting better on three competencies: (1) sewing women's clothes, (2) sewing children's clothes, and (3) sewing men's clothes. Teachers should design and apply cooperative learning to maximize the potential of students, preparing and improving the competence of human resources (teachers), and learning media that can enhance students' motivation of entrepreneurship. © 2016 Author(s).


Lailiyah S.,State University of Surabaya
AIP Conference Proceedings | Year: 2017

Good mathematical literacy skills will hopefully help maximize the tasks and role of the prospective teacher in activities. Mathematical literacy focus on students' ability to analyze, justify, and communicate ideas effectively, formulate, solve and interpret mathematical problems in a variety of forms and situations. The purpose of this study is to describe the mathematical literacy skills of the prospective teacher in term of gender differences. This research used a qualitative approach with a case study. Subjects of this study were taken from two male students and two female students of the mathematics education prospective teacher who have followed Community Service Program (CSP) in literacy. Data were collected through methods think a loud and interviews. Four prospective teachers were asked to fill mathematical literacy test and video taken during solving this test. Students are required to convey loud what he was thinking when solving problems. After students get the solution, researchers grouped the students' answers and results think aloud. Furthermore, the data are grouped and analyzed according to indicators of mathematical literacy skills. Male students have good of each indicator in mathematical literacy skills (the first indicator to the sixth indicator). Female students have good of mathematical literacy skills (the first indicator, the second indicator, the third indicator, the fourth indicator and the sixth indicator), except for the fifth indicators that are enough. © 2017 Author(s).


The purpose of this research was to use the Joko Tingkir software, to measure rapidly tsunamifaulting parameters of the March 2, 2016, earthquake (Mw = 7.8) off the coast of Southern Sumatra. The five parameters that needed measurement were the quake’s rupture duration (Tdur), the dominant period Td), the exceedance duration of 50 seconds (T50Ex), the multiplication between rupture duration and the dominant period (Tdur x Td), and the multiplication exceedance duration and dominant period (T50Ex x Td). The methodology of measuring these parameters is based on the direct analysis of the locally measured seismic broadband vertical components, without inversion. The seismographic data used for this study was obtained from 18 seismic stations of the BMKG network. The tsunami parameters thresholds used by the Joko Tingkir software were: Tdur = 65 s, Td = 10 s, T50Ex = 1, Tdur x Td =650 s2 and T50Ex x Td = 10 s. Earthquakes that have three or more parameters that are equal or bigger than these threshold values, are known to be associated with tsunami generation. Rapid measurements of parameters - in less than 4 minutes after the quake’s origin time - that have values of Tdur = 65.70, Td = 3.60, T50Ex = 0.13, Tdur x T50Ex = 234.00 and T50Ex x Td = 0.48, do not typically generate tsunamis. The authors sincerely thank the Indonesian Agency for Geophysics, Climatology and Meteorology (BMKG) in Jakarta and the GLOBAL CMT for providing full support for the data used in this work. © 2017 -TSUNAMI SOCIETY INTERNATIONAL.


Fiantika F.R.,State University of Surabaya
Journal of Physics: Conference Series | Year: 2017

This paper aims to add a reference in revealing spatial thinking. There several definitions of spatial thinking but it is not easy to defining it. We can start to discuss the concept, its basic a forming representation. Initially, the five sense catch the natural phenomenon and forward it to memory for processing. Abstraction plays a role in processing information into a concept. There are two types of representation, namely internal representation and external representation. The internal representation is also known as mental representation; this representation is in the human mind. The external representation may include images, auditory and kinesthetic which can be used to describe, explain and communicate the structure, operation, the function of the object as well as relationships. There are two main elements, representations properties and object relationships. These elements play a role in forming a representation. © Published under licence by IOP Publishing Ltd.


Peeva P.D.,University of Duisburg - Essen | Palupi A.E.,University of Duisburg - Essen | Palupi A.E.,State University of Surabaya | Ulbricht M.,University of Duisburg - Essen
Separation and Purification Technology | Year: 2011

In the present work, polyethersulfone (PES) ultrafiltration (UF) membranes with molecular weight cut-off (MWCO) from 5 to 300 kDa were analyzed with respect to fouling during filtration of humic acid (HA) model solution. The impact of MWCO and prefiltration of the feed solution on the fouling behavior of these membranes is presented. Moreover, an UV-initiated graft copolymerization of poly(ethylene glycol) methacrylate (PEGMA) onto PES membranes was performed and the effect of the applied modification was examined in terms of MWCO and water permeability changes as well as performance during filtration of HA. Moreover, the fouling behavior and principles during the filtration were compared. Membranes with higher MWCO exhibited stronger flux decline during UF but better cleanability. Prefiltration through 0.45 μm filter improved the membrane performance during filtration of HA but the efficiency of physical cleaning was deteriorated. The applied modification improved the membrane performance during ultrafiltration and facilitated the physical cleaning. This work contributes to a better understanding of the relationships between membrane MWCO, solute size and size distribution, membrane surface chemistry and membrane fouling. © 2011 Elsevier B.V. All rights reserved.


Madlazim,State University of Surabaya
Science of Tsunami Hazards | Year: 2011

Indonesia has an Indonesian Tsunami Early Warning System (Ina-TEWS) since 2008. The Ina-TEWS has used automatic processing on hypocenter; Mwp, Mw (mB) and Mj. If earthquake occurred in Ocean, depth < 70 km and magnitude > 7, then Ina-TEWS announce early warning that the earthquake can generate tsunami. However, the announcement of the Ina-TEWS is still not accuracy. Purpose of this study is to estimate earthquake rupture duration of large Indonesia earthquakes that occurred in Indian Ocean, Java, Timor Sea, Banda Sea, Arafura Sea and Pacific Ocean using a direct procedure and software developed Lomax and Michelini for rapid assessment of earthquake tsunami potential by deriving two simple measures from vertical component broadband P-wave velocity record. The first is the high-frequency apparent rupture duration, Tdur which may be related to can be related to the critical parameters rupture length (L), depth (z), and shear modulus (μ). The second is a confirmation of the earlier finding by Lomax and Michelini, namely that the rupture duration has a stronger influence to generate tsunami than Mw and Depth. We analyzed at least 510 vertical seismogram recorded by GEOFON-IA and IRIS-DMC networks. Our analysis shows that the seismic potency, LWD, which is more obviously related to capability to generate a tsunami than former. The larger Tdur the larger is the seismic potency LWD because Tdur is proportional to L/vr (with vr - rupture velocity). We also suggest that tsunami potential is not directly related to the faulting type of source and for events that have rupture duration greater than 50 s, the earthquakes generated tsunami. With available real-time seismogram data, rapid calculation, rupture duration discriminant can be completed within 3 to 8 min after the P-onset.


Buditjahjanto I.G.P.A.,State University of Surabaya | Miyauchi H.,Kumamoto University
International Journal of Information Technology and Decision Making | Year: 2011

Learning decision making through playing a game is an interesting activity for the decision maker or player. In this paper, a multiobjective optimization problem for economic and emission dispatch in which the player can learn about the tradeoff between fuel cost (economic) and emission problems to achieve optimal decisions is considered. A nonplayer character (NPC) is an entity that is built to provide intelligent decision support for the player. The proposed approach is carried out in two stages for the NPC module: the first stage uses the nondominated sorting genetic algorithm II method to solve the multiobjective optimization problem; this stage produces some optimal solutions. The next stage uses subtractive clustering to cluster optimal solutions; furthermore, these clusters are used to build a fuzzy inference system based on the Mamdani type. In this stage, players can select the best decision offered by the NPC. © 2011 World Scientific Publishing Company.


Madlazim,State University of Surabaya
AIP Conference Proceedings | Year: 2011

Indonesia has Indonesian Tsunami Early Warning System (Ina-TEWS) since 2008. The Ina-TEWS has used automatic processing on hypocenter; Mwp, Mw (mB) and Mj. If earthquake occurred in Ocean, depth < 70 km and magnitude > 7, then Ina-TEWS announce early warning that the earthquake can generate tsunami. However, the announcement of the Ina-TEWS is still not accuracy. Purposes of this research are to estimate earthquake rupture duration of large Indonesia earthquakes that occurred in Indian Ocean, Java, Timor sea, Banda sea, Arafura sea and Pasific ocean. We analyzed at least 330 vertical seismogram recorded by IRIS-DMC network using a direct procedure for rapid assessment of earthquake tsunami potential using simple measures on P-wave vertical seismograms on the velocity records, and the likelihood that the high-frequency, apparent rupture duration, Tdur. Tdur can be related to the critical parameters rupture length (L), depth (z), and shear modulus (μ) while Tdur may be related to wide (W), slip (D), z or μ. Our analysis shows that the rupture duration has a stronger influence to generate tsunami than Mw and depth. The rupture duration gives more information on tsunami impact, Mo/μ, depth and size than Mw and other currently used discriminants. We show more information which known from the rupture durations. The longer rupture duration, the shallower source of the earthquake. For rupture duration greater than 50 s, the depth less than 50 km, Mw greater than 7, the longer rupture length, because Tdur is proportional L and greater Mo/μ. Because Mo/μ is proportional L. So, with rupture duration information can be known information of the four parameters. We also suggest that tsunami potential is not directly related to the faulting type of source and for events that have rupture duration greater than 50 s, the earthquakes generated tsunami. With available real-time seismogram data, rapid calculation, rupture duration discriminant can be completed within 4-5 min after an earthquake occurs and thus can aid in effective, accuracy and reliable tsunami early warning for Indonesia region. © 2012 American Institute of Physics.


The purpose of the research was to estimate P-wave rupture durations (Tdur), dominant periods (Td) and rupture durations greater than 50 seconds (T50Ex) for two large, shallow earthquakes, which occurred off the coast of Sumatra on 6 April and 25 October 2010. Although both earthquakes had similar parameters of magnitude and focal depth, the 25 October event (Mw=7.8) generated a tsunami while the 6 April event (Mw=7.8) did not. Analysis of the above stated parameters helped understand the mechanisms of tsunami generation of these two earthquakes. Measurements from vertical component broadband P-wave quake velocity records and determination of the above stated parameters could provide a direct procedure for assessing rapidly the potential for tsunami generation. The results of the present study and the analysis of the seismic parameters helped explain why one event generated a tsunami, while the other one did not.


Wahini M.,State University of Surabaya
IOP Conference Series: Materials Science and Engineering | Year: 2016

The date palm (Phoenix dactylifera L) is one of the oldest fruit plants that identical with people's lives in the Middle East including The Kingdom of Saudi Arabia since ancient times.The date palm is known and consumed by most of people in the form of fruit flesh, while its seed is discarded tough it is rich in nutrient. Therefore, need to be explored the potential of date seed through product innovation of foodstuffs with a high nutritional value. The aims of this study were to 1) know how to make flour from date seed, and 2) determine nutritional content of date seed's flour. This study was experiment and conducted in July, 2015 at the laboratory of food technology, Family Welfare Education department. Chemical analysis was used to determine nutrients content. The results showed that 1) the flour of date seed produced from the process of washing, soaking, flushing, boiling, draining, drying, grinding, and sieving; 2) the flour of date seed's flour have a macro nutrients value. This study explains that date seed is regarded as rubbish, in fact, it has a high value that can be an alternative substitution of wheat flour. © Published under licence by IOP Publishing Ltd.

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