Indonesia Conference Directory

Corresponding Author
Nida El-Islamy Qomaruddin

Institutions
Oceanography Department, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung, Bandung

Abstract
The Timor and Arafura Seas are part of the Eastern Archipelago waters which directly meet the Indian Ocean and make the Timor Sea as the largest exit of Indonesian Throughflow. The aims of this research are to study the structure of stratification, types and contribution of water masses in the Timor and Arafura Seas. This study used temperature, salinity, and density data from Conductivity, Temperature, and Depth (CTD) measurements in the 2010 Arafura and Timor Seas Ecosystem Action Program (ATSEA). The water masses stratification was determined by calculating the temperature and salinity gradient per one meter depth, the type of water masses was determined by the T-S diagrams, and the contribution of each type of water masses is known from the Optimum Multi Parameter (OMP) analysis. The results showed that there are three water masses layers in the Timor Sea, namely the mixed layer, thermocline and halocline, and the deep layer; and two layers in the Arafura Sea are the mixed layer and the thermocline and halocline. There are 6 types of water masses identified in the Timor Sea with its contributions as follows; in the mixed layer there are Halmahera – Misool Water (HMW) contributing around 40 – 70% and Seram – Banda Water (SBW) contributing around 50 – 60%; in the thermocline layer there are Southern Subtropical Lower Water (SSLW) contributing around 30 – 40% and Indonesian Upper Water (IUW) contributing around 40 – 50%, and in the deep layer there are Austral Asian Intermediate Water (AAMW) contributing around 100% and Antartic Intermediate Water (AAIW) contributing around 20 – 70%. In the Arafura Sea, 2 types of water masses were identified with its contribution as follows; Halmahera – Misool Water (HMW) contributing around 30 – 50% and Seram – Banda Water (SBW) contributing around 100%.

Keywords
Stratification; water masses; ATSEA 2010; Timor Sea; Arafura Sea.

Topic
Coastal and Ocean Dynamics

Link: https://ifory.id/abstract/dYbwGkNxDLPq

Corresponding Author
Mustika Mentari

Institutions
a,b,c) Departement of Information Technology, Politeknik Negeri Malang
*must.mentari[at]polinema.ac.id

Abstract
Maps are one form of an image that often encountered in various interests. For example, many books on tourist attractions or other information that provide maps as a media of information. However, sometimes people with visual impairments such as presbyopia, hypermetropia, or astigmatism have difficulty reading the map which is usually given in small size, multi orientation (multi-scale and multi-direction). Therefore, this study tries to provide a solution through an application that converts image to text in image conditions that have many orientations and different things are briefly called heterogeneous text. The Optical Character Recognition (OCR) system that was built beginning with taking pictures made through a cellphone camera as the first step in obtaining a digital map file, then enters the preprocessing, text segmentation, feature extraction from each different character, then continues to the classification stage. This OCR system for recognizing text with multiple orientations will help people make digital maps easier to read, especially for people who have presbyopia, hypermetropia, or astigmatism vision problems. The proposed model achieves good average accuracy for classifying the characters in various orientation successfully.

Keywords
Optical Character Recognition, Map, Multi Orientation, heterogeneous text ,k-nearest neighbor

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/4xrtEUj28FGy

Corresponding Author
Arie Rachmad Syulistyo

Institutions
Politeknik Negeri Malang

Abstract
Tracer studies are useful for universities, institutes, and academies, as well as scholarship providers such as government, companies, and institution. Tracer studies are used to track alumni which can be used to measure the relevance of objectives, educational processes and curriculum in accordance with current alumni conditions. However, the tracer study has several obstacles in the distribution process to reach out and make alumni willing to spare their time for filling the tracer studies. This study aims to overcome this problem by gathering the information needed from social media such as workplaces and professions. The results of this study will be applied to the Malang State Polytechnic Information Technology Department.

Keywords
tracer studies, media social,

Topic
Information Systems Technology

Link: https://ifory.id/abstract/gUce24Cwqu7x

Corresponding Author
Febryan Alandiestya Arif

Institutions
a) Department of Management Technology, Institut Teknologi Sepuluh Nopember *febreealandiestya[at]gmail.com
b) Department of Business Management, Institut Teknologi Sepuluh Nopember

Abstract
In line with what was stated by the Southern Connecticut University that the making of strategic plans in any form is a significant effort. Whereas to strategically manage Information System and Information Technology (IS / IT), understanding is needed on how the role of technology-based information systems has evolved in organizations (Ward & Peppard, 2002). Moreover, the development of technology in these days and age has been so rapidly moving. Through this paper, the researcher aims to make an IS / IT strategic plan in an educational institution. This research will begin by compiling the Critical Success Factors from each division, which can then be continued to implement the Gap Analysis to get a comparison between the actual conditions and the desired conditions. All of these things must be based on the organizational goals that have been announced by the school. The next stage, the researcher will carry out the planning framework steps initiated by a firm named Berry, Dunn, McNeil, & Parker (BerryDunn). This planning framework is commonly used by BerryDunn firms in several major cities and institutions in the world and is expected to fill in gaps that might be found at the Gap Analysis stage. The researcher hopes that this research can produce strategic IS / IT planning at Muhammadiyah 10 GKB Senior High School. In addition, this research is also expected to be able to provide benefits to the educational institutions in Indonesia.

Keywords
strategic planning, IS / IT, critical success factors, gap analysis, BerryDunn-s planning framework, Muhammadiyah 10 GKB Senior High School

Topic
Management Strategic

Link: https://ifory.id/abstract/7ZKbPkpNVQeL

Corresponding Author
Siti Indah Purwaning Yuwana

Institutions
IAIN JEMBER

Abstract
Customer loyalty is a key factor that can help companies achieve long-term success. The purpose of this study was to analyze the direct and indirect effect of price, brand image, and product quality Samsung Smartphone to customer loyalty, through satisfaction as an mediated variable. Data were obtained from questionnaires to 145 respondent using purposive sampling technique. Hypotheses are tested using Structural Equation Modeling (SEM). The results showed that the price and brand image have not significant effect on customers satisfaction and loyalty, product quality has significant influence customer satisfaction and loyalty, customer satisfaction has significant effect on customer loyalty. In addition, customer satisfaction is not able to be mediating variables that influence the effect of price and brand image to customer loyalty, but customer satisfaction mediates the effect of product quality to customer loyalty. The mediation effect of customer satisfaction is fully mediated.

Keywords
Price, Brand Image, Quality Product, Satisfaction, Customer Loyalty, Smartphone

Topic
Economics

Link: https://ifory.id/abstract/LjDJM8nfTGxw

Corresponding Author
Dini Asri Kusnia Dewi

Institutions
Indonesia University of Education

Abstract
Many people assume that addition and subtraction are simple calculations. However, some studies in Indonesia reveal that students still experience some problems associated with it, such as the carrying method in addition and borrowing method in subtraction. In terms of learning, when referring to Brunners theory, the presentation of the textbook does not provide an explanation of how to calculate using the iconic representation. Of all these things, it is important to be able to know the way students think that this depends on the mental model. However, because the mental model is an internal representation then the effort that can be done is analysis them through representation. Therefore, this study was conducted through tests and interview for students, also interviews for teachers. The field survey results show a tendency in selecting the type of representation. In addition, this paper will also be presented a representation of the mental model of a student.

Keywords
Mental Models, Representation, Addition, Subtraction

Topic
Mathematics Education

Link: https://ifory.id/abstract/FBT7UzgnLJrc

Corresponding Author
Mira Setiana

Institutions
1) Department of Physics, Faculty of Mathematical and Science, Universitas Brawijaya, Jl. Veteran, 65145 Malang, Jawa Timur
a)mirasetiana[at]student.ub.ac.id
b)tyasnz[at]student.ub.ac.id
c) sakti[at]ub.ac.id

Abstract
Quartz crystal microbalance respond not only to the deposited mass on its surface, liquid property in contact with its surface, but also respond to the mechanical property change of its coating material. The mechanical property of the coating material which affects the sensor resonance frequency is the modulus elasticity change, mass density change and conformational change of the coating layer. It is known that the polymer mechanical property can be affected by the gas or liquid in contact with the polymer. Gas or liquid absorption leads to the change in the modulus elasticity of the film which absorb the gas or liquid compare to the initial film modulus elasticity. Ionic interaction may also affect the polymer film mechanical property. Potassium chloride solution in water has ionic strength related to its concentration. This work shows that the frequency respond of the QCM sensor coated with polystyrene was affected by the potassium concentration in water. The frequency change of the QCM sensor coated with polystyrene film to the potassium chloride concentration from was presented.

Keywords
Quartz crystal microbalance; Potassium chloride; Polystyrene

Topic
Functional Materials

Link: https://ifory.id/abstract/ebXDPmChQFqL

Corresponding Author
Siti Epa hardiyanti

Institutions
Universitas Sultan Ageng Tirtayasa

Abstract
Penelitian ini bertujuan untuk memberikan informasi tentang ukuran perusahaan sebagai faktor pemoderasi hubungan profitabilitas dan pertumbuhan perusahaan terhadap struktur modal. Teknik sampling yang digunakan yaitu mengunakan metode purposive sampling. Sedangkan Metode analisis data yang digunakan yaitu statistik deskriptif dengan menggunakan uji asumsi klasik dan uji hipothesis. Uji Moderated Regression Analysis (MRA) digunakan untuk menggambarkan pengaruh variable moderating (Ukuran Perusahaan) terhadap hubungan variable independen (Profitabilitas dan Pertumbuhan Perusahaan) dengan variable dependen (Struktur Modal). Temuan yang dihasilkan dari penelitian ini yaitu ukuran perusahaan (Size) tidak mampu memperkuat atau memperlemah hubungan profitabilitas terhadap struktur modal. Sedangkan size mampu memperlemah hubungan growth terhadap struktur modal. Keterbatasan dan implikasi penelitian ini yaitu pada jangka waktu/periode sampel data yang diteliti hanya berjangka waktu 6 tahun dari tahun 2010 sampai dengan tahun 2015, sehingga data yang diambil ada kemungkinan kurang mencerminkan kondisi perusahaan dalam jangka panjang. Penelitian ini hanya terbatas untuk sampel sub sektor Pertanian saja, sehingga kurang mewakili seluruh perusahaan yang terdaftar di Bursa Efek Indonesia (BEI). Orisinalitas penelitian menyajikan ukuran perusahaan (size) sebagai faktor pemoderasi, untuk mengatasi gap yang terjadi pada pengaruh profitabiltas dan growth terhadap struktur modal

Keywords
ROA;GROWTH;DER;SIZE

Topic
Manajemen Keuangan

Link: https://ifory.id/abstract/DyGxBFZVuh9C

Corresponding Author
Rahmawati Munir

Institutions
Institut Teknologi Bandung

Abstract
We have investigated new approach to predict mechanical properties for non-homogeneous materials. The investigation use a copy paper 100 gsm as sampling object using image tracking method and based on bending of cantilever slender beam. The copy paper 100 gsm was shaped on non-homogeneous geometris then placing it with curvature angle variations (00, 450 and 900). We snapshot the copy paper sample using digital camera to track bending coordinates at several points after divided the beam image into 16 segments. Futhermore, we calculated Modulus Young using elasticity equation for non-homogeneous beam. The results presented show that it is possible to obtain a good Modulus Young value due to approach Modulus Young value obtained by direct measurement using tensile strenght device. This method is expected to become a reference for developing Modulus Young estimation for non-homogeneous geometri materials without direct contact.

Keywords
modulus elasticity, copy paper 100 gsm, image tracking, cantilever beam

Topic
Synthesis and Characterization Techniques

Link: https://ifory.id/abstract/v6eUmyYJKdEH

Corresponding Author
Mulyadi Muljadi

Institutions
Physics Department, MIPA UNiversity Sriwijaya Palembang

Reseach Center for Physics LIPI

Abstract
Alloy of NdFeB powder is used for manufacture of permanent magnet and it has highest magnetic properties compared to other permanent magnet materials such as : Ba-ferrite, AlNiCo and SmCo.The Flakes of NdFeB was made by melt spinn method and it has about 0.2 – 0.3 mm in thickness. The flakes of NdFeB was milled by using High Energy Milling (HEM) machine and used a liquid toluene as milling media. The milling time was varried such as : 30, 60, 90, and 120. After milling, the samples were dried by using Vacuum dryer at temperature 80oC under vacuum (10 mmbar) for 2 hours. The fine powder samples were analyzed crystall structure by using XRD, measured magnetic properties by using VSM and also measured particle size distribution (PSA). The characterization result show that the milling time gives a effect on the crystall structure and magnetic properties, where samples with milling time 60 dan 90 minutes has Fe phase as dominant phase and the Nd2Fe14B phase does not existing also the coercivity value tends to decrease until lower than 100 Oe. Samples with milling time about 30 and 60 minutes have Fe phase and Nd2Fe14B phase also they have corecivity value about 850 – 1040 Oe. The means of particle size is achieved about 1.44 µm at sample with milling time 60 minutes.

Keywords
Magnet Nd2Fe14B, Flakes NdFeB, HEM, coercivity

Topic
Metal alloys, ceramics and composite materials

Link: https://ifory.id/abstract/eKDFN4pdLVWx

Corresponding Author
Henni Sitompul

Institutions
a) Department of Physics Education, Pelita Harapan University, Tangerang, Indonesia

b) Faculty of Math and Science, Bogor Agricultural University, Bogor, Indonesia

c) Faculty of Veterinary Medicine, Bogor Agricultural University, Bogor, Indonesia

d) National Nuclear Energy Egency of Indonesia, Tangerang Selatan, Indonesia

Abstract
The development of Mg-based biomaterials in orthopedics has been extensively studied in the past 17 years. Various methods and compositions were developed to obtain Mg-based biomaterials that have mechanical properties and corrosion resistance which match the bone. One of the developments was done by composing Mg alloy with other material. In this research,will be synthesized biokomposit Mg6Zn-xHAp with sintering process at 3500C. The biocomposites were synthesized by mixing the HAp powder on the Mg6Zn powder mixture with the composition of 5%, 7% and 9% using ball milling for 30 minutes. Biocomposites were characterized by Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM/EDS), X-ray diffraction (XRD) and Potensiostat. The SEM / EDS results showed that the Mg6Zn-xHAp biocomposite had microstructures whose grain size decreased as the HAp composition got larger with HAp at the grain boundaries only. The XRD pattern of Mg6Zn-xHAp biocomposite indicated that some of Zn atoms had dissolved in Mg to form a solid solution in the sintering process. The greater composition of HAp in the material results in a decrease of Zn in Mg. The greater composition of HAp in the material results in a smaller Zn solubility in Mg. In addition, XRD results also showed that the crystallite biocomposite size is smaller when the composition of HAp in it is greater. Thus, it can be said that HAp can act as a refiner of the Mg alloy. The presence of HAp in the material also affects the corrosion rate where the greater the composition of HAp in the material the smaller the corrosion rate of the resulting material.

Keywords
Mg6ZnHAp, Biocomposite, Hap, Mg6Zn

Topic
Biomaterials and applications

Link: https://ifory.id/abstract/MHFrjnVLTeRy

Corresponding Author
Donna Helen Rajagukguk

Institutions
a) State University of Medan
Jalan William Iskandar Ps. V, Kabupaten Deli Serdang, Sumatera Utara 20371, Indonesia
*gabejhp[at]gmail.com

Abstract
Mechanical energy is one of the topics of learning physics in high school that is related to concepts and mathematical equations. Modellus is a computer application designed to explore mathematical models based on functions that are represented in the form of animations, graphics, and tables that are useful for focusing learning activities on understanding student physics concepts. In this study describes computational modelling activities using Modellus software and carried out the Modellus quality testing phase as a medium of physics learning to improve understanding of students concepts on the topic of mechanical energy. Based on the data obtained, Modellus is included in the "very good" category used in physics learning especially on the topic of mechanical energy and critical thinking skills students obtain an average score of 65,45 in the “good” category using Modellus.

Keywords
Modelling, Mechanical Energy, Modellus, Critical Thinking

Topic
Physics related sciences

Link: https://ifory.id/abstract/CfnxFbyQwtWu

Corresponding Author
Togi Tampubolon

Institutions
a) Department of Physics, State University of Medan, Indonesia
*topartam[at]gmail.com
b) Center for Space and Remote Sensing Research, National Central University, Taiwan

Abstract
The 7.5-magnitude earthquake was intensified epicenter located in the Mountains Donggala Regency, Central Sulawesi. Devastating earthquake and tsunami on September 2018, that struck and erased urbans and suburbs in stricken city in Central Sulawesi and surrounded. The main priorities of the risk disaster management in post-event are fast and safe detection of geohazards to help search and rescue team do mitigation. Satellite radar and optical remote sensing represent the aim of this research to answer this task with Interferometric Synthetic Aperture Radar (InSAR) by Sentinel-1 Interferometric Wide (IW) Level-1 Single Look Complex (SLC) images and optical satellite data by Sentinel-2 Level-1C product. We collected both of satellite images covering the time interval October 2018 – July 2019. We improved the proposed approach, named as Goldstein interferogram filter and the landslide mapping in Central Sulawesi. The methodology, which is intended as an effective process to suppress phase noise to improve the accuracy assessment and represent the experimental information from a full stack of InSAR data and optical data, is ideally acceptable for geohazard mitigation strategies. This potential method refers to great performance for detecting more than 100 areas affected by active deformation that are most dangerous for one or more risky elements in several parts of three cities.

Keywords
Interferometric Synthetic Aperture Radar (InSAR), Optical images, Deformation, Earthquake

Topic
Physics related sciences

Link: https://ifory.id/abstract/q96dAx82vWb3

Corresponding Author
Kusumandari Indah Prahesti

Institutions
Animal Production Departmen, Faculty of Animal Science, Hasanuddin University, Makassar
*kusumandari.indah[at]gmail.com

Abstract
Brucellosis in cattle is a zoonotic disease that causes abortion. This disease is highly contagious and difficult to control. Clinical symptoms Brucellosis is not pathognomonic and often asymptomatic thereof laboratory assessment is needed for serological detection of Brucellosis. A total of 235 blood samples were obtained from Bali cattle farms in three regencies, Enrekang, Barru, and Soppeng. Serological detection was carried out by the RBT method and further confirmed by CFT method. Results showed that Brucellosis seroprevalence was 12.76%. The highest incidence rate was in Enrekang Regency with the value of 15.60%, followed by Soppeng and Barru Regency, of 9.09% and 2.50%, respectively. These results indicated that Brucellosis is still enzootic in the South Sulawesi region.

Keywords
Brucellosis, RBT, CFT, seroprevalence, Bali cattle

Topic
Animal welfare and health

Link: https://ifory.id/abstract/GVxhpHArk9gL

Corresponding Author
Muhammad Farda

Institutions
Institute of Technology Bandung
University of Leeds

Abstract
Transportation sector has been the main contributor to greenhouse gas emissions globally and is more significant in emerging economies where the vehicle growth is very high. Immediate as well as long term strategic measures need to be developed and implemented to tackle the growing problem. Indonesia is a country with high vehicle population particularly dominated by gasoline motorcycles. The Indonesian government has acknowledged the problem and been formulating policies to support vehicle electrification as the way ahead. A joint Indonesian industry and research institution has been designing an electric motorcycle to promote the policy on vehicle electrification. However, the question emerges whether electric motorcycles can compete with gasoline motorcycles in Indonesia. This study assesses the uptake of electric motorcycle in Indonesia, particularly in Bandung city which is the 3rd most populous city in the country. This study designed a bespoke stated preference survey questionnaire to capture the preferences of the users and analysed data using discrete choice methods. In particular, three models, namely multinomial logit, mixed logit and hybrid logit are used to assess the share of electric motorcycles. This study contributes to the literature by adding new charging methods, namely plug-in and battery swap, either at home / office parking or charging station. In addition, this study measures the importance of electric motorcycle attributes, such as purchase price, operational cost, maximum speed and range per charging, and estimates the marginal willingness to pay. An understanding on factors influencing electric motorcycle uptake will be beneficial for manufacturers to improve the performance of electric motorcycles. Moreover, the policy makers will also benefit by knowing which aspects of electric motorcycle they need to support for it to reach a high penetration. The outcomes of choice models feed into a system dynamic diffusion model which considers broader factors affecting the electric motorcycle uptake over a period of time which is presented in a separate paper.

Keywords
Electric Motorcycle, Choice Modelling, Stated Preference

Topic
EV Socio-Economical Impact

Link: https://ifory.id/abstract/gpAPCfBhXknZ

Corresponding Author
Hari Maghfiroh

Institutions
Dept. Electrical Engineering
Universitas Sebelas Maret
Indonesia

Abstract
Electric vehicles are widely used because of their advantages over internal combustion engine (ICE) vehicle such as low emission and environment friendly. In Indonesia, electric vehicles have begun to be marketed and developed. One of the weaknesses of electric vehicles in Indonesia is the limited availability of charger stations. For this reason, this research proposes the design and prototyping of low cost charger station. The charging station equipped with keypad to input how much power that will be purchased and an LCD to monitor the status. This station can be used to charge both electric car and electric motorcycle/ bicycle. Prototype has been built and tested to charge Plug-in Hybrid Electric Vehicle (PHEV) car both for normal charging and fast charging with satisfactory results.

Keywords
electric vihicle, EV, charging, station

Topic
Battery Technology and Management System

Link: https://ifory.id/abstract/ENT2MWbUBpZL

Corresponding Author
Hardy Adiluhung

Institutions
1. Telkom University, Creative Industries School Product Design
2. Telkom University, Creative Industries School Product Design

Abstract
ABSTRACT PT. Pindad Persero is a military manufacturing industry division of vehicles that uses three-dimensional printer techniques, in every design to accelerate the form of prototype product development. The advantages of three-dimensional printers, its easy to make complicated shapes. This is caused by the movement of the printing movement in three-dimensional space. Related to this, in every opportunity to help a product, the role of a three-dimensional printer is very important, as a display tool or technique in promotion, so that this role can improve the process of duplicating the form or application form with temporary materials, this technique is quite effective and reduces costs production, and the results of the 99% form of the real form, the shape of the parts of the fighter, of course there are special techniques so that it is perfect as in the real form, both in the form of finishing and paint finishing techniques.

Keywords
Three Dimensional Printer, Dummy, Special Vehicles

Topic
Design

Link: https://ifory.id/abstract/YE73vQBkG6Zh

Corresponding Author
Eusabius Paul Pega

Institutions
UNIVERSITAS GADJAH MADA
Bulaksumur, Caturtunggal, Kec. Depok, Kabupaten Sleman, Daerah Istimewa Yogyakarta, 55281

Abstract
An attempt to extend the shelf life of fresh products after harvest still need to be investigated to find the most applicable technology with the cheapest cost for the farmer. Seeking of such technology becomes an important aspect for better postharvest handling in Indonesia. In the developed countries, since along ago there has been a storage technology known as controlled atmosphere storage (CAS), however this technology is very complicated and very expensive to build. As an alternative, MAS seems to be possible to develope for developing country as Indonesia, since MAS doesn-t need a precise controlled of the gas composition continuously and much cheaper than CAS. The purpose of this study was to develope and investigate a method including the equipment to store fresh agricultural produtcs which could be modify the gas composition and temperature inside the storage room, which was know as MAS. Reseach had been carried out by constructing the MAS equipment first. The equipment made from available components from the local marked such as wood board, heat insulator, refrigeration unit, nitrogen gas tank, carbon dioxide gas tank, oxygen gas tank, pipes and so on. Then continued by examining the constructed equipment to create various gas composition and storage temperature inside the storage room as required for storage of fresh products. It was found that both temperature and gas composition could be created as required manualy by choosing intended temperature level and regulating gas flow from the tank. Concentration of oxygen inside storage room could be reduced by flushing nitrogen gas from the tank until the intended value was reached. As lower oxygen concentration was the main factor to reduce respiration rate, while nitrogen gas was known as an inert gas this meant that the created of gas composition to extend shelf life of agricultural product definetely could be resulted. It was found that resulted gas compisition could be maintained around one day and need to be adjusted again to the intended composition after that. The next research would be conducted to examine the performance of the equipment using fresh product inside the storage room. This research was still in progress using tomato as the sample. Some parameters would be measured both dealing with the performance of the equipment and physical properties of the stored fresh product. The combination of gas composition and temperature inside storage room of MAS would be investigated applying factorial design experiment 3 x 4 with three replication. The resulted data would be analyzed both statisticaly and mathematically including the application of kinetics modeling.

Keywords
modified, atmosphere, storage, tomatoes, kinetics

Topic
Agricultural Engineering

Link: https://ifory.id/abstract/HxcpzV6CvM34

Corresponding Author
Nurul Magfirah

Institutions
(a) Master Student of Mining Engineering, Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung
Jalan Ganesha 10, Bandung 40132, Indonesia
*nurulmage17[at]yahoo.com
(b) Earth Resources Exploration Research Group, Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung
Jalan Ganesha 10, Bandung 40132, Indonesia

Abstract
This paper reviews our study aimed at identifying hydrothermal alterations to surface minerals as a result of volcanic activity at the Wayang Windu geothermal field, which is in a southern volcanic complex on the island of Java. The characteristics of hydrothermal alterations in Wayang Windu are related to surface manifestations. The geologic conditions are that it lies within andesitic, volcanic highlands formed by a concentration of volcanic centers in this part of the Sunda Arc. The geothermal manifestations are related to faults that are affected by volcanic activity, and the geothermal area is characterized by zones of intensive surface alteration at fumaroles and hot springs. There were 17 soil samples collected during a field survey and then analyzed in the laboratory using primarily X-ray diffraction (XRD). The results show that the alteration mineral assemblages observed are strongly associated with surface manifestation intensity. The presence of silica, kaolinite, halloysite, and alunite minerals identified the location as part of an advanced argillic alteration zone in the surface area.

Keywords
Surface alteration, geothermal, manifestations

Topic
Geology

Link: https://ifory.id/abstract/wY2JqvQeV6Pj

Corresponding Author
Nihta Liando

Institutions
Universitas Negeri Manado

Abstract
Students socioeconomic status is commonly argued as one factor which may impact on students learning performance. This article reports a study investigating the effect of socioeconomic status (SES) on high school students performance as they study English as a foreign language (EFL) subject in school. In this study, besides the social economic status of parents, parental and family influences as well as social orientation were also measured. One hundred forty-four students from two different high schools participated in the self-reported questionnaire. The high schools were purposely chosen in order to cover different range of socioeconomic status. Findings showed that to some extent, socio economic status and parents influence played a significant role to be successful in learning English.

Keywords
EFL, socio-economic status (SES), students performance

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/uqrRGKZh7692

Corresponding Author
chairunnissa chairunnissa

Institutions
Postgraduate School State University of Medan

Abstract
This research deals with intertextuality in opinion articles on brochure education. Brochure education as an object in the research. The researcher focused on education advertisement in brochure. The preliminary data in this present is brochure advertisement of education. The preliminary data as their literature reference to gain target audience interest as the basic and most used context relevancy literatures. Its objectives are to discover types and functions of intertextuality the articles. The results of the reserch reveal there are three major types and two major functions of intertextuality in the articles. The type dominantly applied is indirect quotation and the function dominanty applied is to provide things in detail. The social practice found in the articles is that the intertextuality is functioned to create an image that the articles possess a level of academic text. This study shows briefly three major types of intertextuality which possibly emerge in Indonesian texts. Those are transtextuality, metatextuality, and Quasitextuality.

Keywords
Intertextuality, Brochure Education, Discourse

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/bujAaKJYEyXB

Corresponding Author
ahmad zaki

Institutions
Postgraduate Students in Physical Education Medan State University

Abstract
The aim of the study to find out the influence between symbolic modeling technique service and group guidance services in increasing achievement motivation based on anxiety levels on the physically impaired athletes of North Sumatera PPI NPC. This study used expost facto method. Data collection techniques in this study used a questionnaire and observation. Data analysis techniques using path analysis. The hypotheses on the discussion of this study are:(1)There is no influence of symbolic modeling guidance services (X1) on anxiety (Y), (2) There is an influence of the influence of symbolic modeling guidance services (X1) on Anxiety (Y), (3) There is no influence of group guidance services (X2) on anxiety (Y), (4) There is an influence of group guidance services (X2) on Anxiety (Y), (5) There is no influence of anxiety (Y) on achievement motivation (Z), (6) There is an influence of anxiety (Y) on achievement motivation (Z).

Keywords
Guidance service, Anxiety, Achievement motivatian

Topic
Curriculum, Research and Development

Link: https://ifory.id/abstract/cR2bGFy4pztX

Corresponding Author
Juanda Juanda

Institutions
Postgraduate State University of Medan

Abstract
This study aimed to determine the feasibility of digital interactive Digital Storytelling and to know the effectiveness of multimedia interactive Digital Storytelling on student English learning outcomes. Type of this research used development research from Borg and Galls product development model that combined with Dick and Carey learning development model. The stages of this study are divided in to stages of needs analysis. Digital Storytelling (design) learning media planning stage. Develop and test phase. The results of this study indicated (1) the test of English language material experts is very well qualified (87.50). (2) the learning media expert test is in very good qualification (81.07 ). (3) the learning design test is very good qualified (88). (4) individual trials are in very good qualifications (94.81). (5) small group tests are very good qualifications (96.09). (6) field trials are very good qualifications (98.57). The results of hypothesis testing prove that there are significant differences between student learning outcomes that do not use Interactive Multimedia Digital Storytelling with those using Interactive Multimedia Digital Storytelling. This is indicated by the results of processing data t count = 5.84. at the significance level = 0.05 t table = 2.75. It was concluded that Interactive Digital Multimedia Storytelling was developed to be feasible and effective to improve learning outcomes in English.

Keywords
Results of Learning English, Interactive Multimedia Digital Storytelling

Topic
Curriculum, Research and Development

Link: https://ifory.id/abstract/f6KRc8WQebdM

Corresponding Author
Al Azharsyah

Institutions
a) Sport Education, Post Graduate Program, Universitas Negeri Medan
* coklatmaroon[at]gmail.com

Abstract
Adolescence is a period of increasing curiosity about something. This great curiosity makes teenagers want to try new things without knowing the positive and negative impact. The rapid development of technology also does not limit a person in interacting with anyone and does not rule out the possibility of falling into promiscuity and then getting interested and trying drugs. The impact of drugs for adolescents includes being irritable, mental disorders, reducing discipline, also lacking passion. These impacts can hinder students understanding of learning even interfere with other students. Based on the results of the National Anti Narcotics Agency (BNN) survey in 2018, drug addicts in Aceh reached 73,201 people, including teenagers. For this reason, it is necessary for teachers to provide an understanding the dangers of drugs to students so those students avoid the dangers of drugs and the learning process becomes effective and conducive. A key to achieve understanding in students is through the use of interactive multimedia. Interactive multimedia is a multimedia that is equipped with a controller that can be operated by the user, so users can choose what they want for the next process. Examples of interactive multimedia such as robots, games and others. Interactive multimedia learning can facilitate the teacher in explaining and facilitating students in understanding learning to be in tune with the times of technology-based.

Keywords
Interactive Multimedia, Drug.

Topic
Curriculum, Research and Development

Link: https://ifory.id/abstract/nwxyeGFj4WYc

Corresponding Author
Mister Gidion Maru

Institutions
Universitas Negeri Manado

Abstract
Writing is a result of process involving idea development and language competence. This research paper reports the investigation of the pattern of students- effort of revising a writing project. It constitutes a qualitative study by obtaining the data through conducting in-depth interviews with two classes of advance level students in English Education Department. Prior to the interview, the students complete a writing assignment in the form of one semester project. As respondents, students answer the main of question of the interview dealing with how they did the EFL writing project assignment. The findings reveal that the completion of the project, which undergoes process, requires revision for several times depending upon the allotted time. This revision process portrays students- tendency in revising their writing project such as social media grouping, technology application dependence, in-group dynamics and learning model preference. These findings seem to be pivotal contribution for teachers to design students- project for language learning purpose.

Keywords
Revision Behavior, Writing Project, EFL

Topic
Learning / Teaching Methodologies and Assessment

Link: https://ifory.id/abstract/b7E9fDPahxQX

Corresponding Author
Fahruddin Fahruddin

Institutions
1. Postgraduate Program Educational Administration, and Department of elementary school Education, Universitas Mataram Lombok- West Nusa Tenggara- Indonesia
1. Postgraduate Program Educational Administration, and Department of Early Childhood Education, Universitas Mataram Lombok- West Nusa Tenggara- Indonesia

Abstract
THE CORRELATIONS BETWEEN KNOWLEDGE OF SCHOOL-BASED MANAGEMENT AND EMOTIONAL INTELLIGENCE WITH THE PUBLIC JUNIOR SECONDARY SCHOOL PRINCIPALS LEADERSHIP Mansur Hakim1 and Fahruddin2 1. Postgraduate Program Educational Administration, and Department of elementary school Education, Universitas Mataram Lombok- West Nusa Tenggara- Indonesia 2. Postgraduate Program Educational Administration, and Department of Early Childhood Education, Universitas Mataram Lombok- West Nusa Tenggara- Indonesia. Jalan Pendidikan No. 37 Mataram Nusa Tenggara Barat; Phone : 0370 7056625 2.Corresponding author : Fahruddin – Email : fahruddin.fkip@unram.ac.id. The aims of this research are to study the correlations between knowledge of school-based management and emotional intelligence with the Public Junior Secondary School Principals Leaderships. The research was conducted in Public Junior Secondary School in Jakarta. This research used survey method. The samples of this research were 30 the Public Junior Secondary School Principals selected randomly. The data were analyzed by using descriptive statistics and path analysis.The results of this research shown that there are positive correlations between: (1) knowledge of school-based management with the Public Junior Secondary School Principals- Leaderships; (2) emotional intelligence with the Public Junior Secondary School Principals Leaderships; (3) knowledge of school-based management and emotional intelligence with the Public Junior Secondary School Principals Leaderships. The conclusions of this research therefore to improve the Public Junior Secondary School Principals Leaderships, than knowledge of school-based management and emotional intelligence should be improved.

Keywords
Correlation, Principal Leadership, Knowledge Of School-Based Management, Emotional Intelligence.

Topic
Curriculum, Research and Development

Link: https://ifory.id/abstract/WtudweMm2ca7

Corresponding Author
Wahyudi Buska

Institutions
a),b) Faculty of Islamic Education and Teacher Training, Sulthan Thaha Saifuddin State Islamic University of Jambi 36361,Indonesia
*wahyudi[at]uinjambi.ac.id

c), d), e) Faculty of Syariah and Law, IAIN Kerinci Jambi, Indonesia

Abstract
This research aims to reveal one of the traditions of people in Tanjung Hilir Kerinci, the recitation of the Khutbah Gulung (lit: speech roll) every Idul Fitri and Idul Adha. This tradition have lasted for decades. The text was written in Arab Melayu using connected pieces of paper and then rolled on a piece of log. The text was made in two themes, one for Idul Fitri and another for Idul Adha. These texts have not changed since the first time it was written decades ago. This research is considered as field research with qualitative approach using ethnographic, historic, and content analysis method. After analyzing the content of the texts, it was found out that the recitation of Khutbah Gulung was not only part of a religious ritual, but also contain academic importance by educating the listeners on how to become a better individual. The contents of Khutbah Gulung is always connected to the aim of humanism education in order to make the members of the society a better individual who realize his rose as God-s highest order of creation, sent to earth to nurture, protect, and improve our nature. Researcher would like to conclude that the practice of Khutbah Gulung among the people in Tanjung Pauh Hilir have become part of their life and tradition, inherited from earlier generation and will be inherited by the next. It will be continued and become an icon of people in Tanjung Pauh Hilir Kerinci Regency.

Keywords
Tradition, Khutbah Gulung, Religious Ritual, Humanist Education.

Topic
Other Areas of Education

Link: https://ifory.id/abstract/QRVT29aPezKG

Corresponding Author
Dinda Aprilia

Institutions
Universitas Negeri Malang

Abstract
Pulutan (Urena lobata L.) is a type of plant that is widely used as traditional medicine. The compound in pulutan leaves consists of alkaloids, tannins, triterpenoids, flavonoids, saponins and steroids that work as antifertility agents. The purpose of this study was to determine the effect of giving pulutan leaves (Urena lobata L.) simplicia to the number of follicles of mice (Mus muscullus) Balb-C strain. This study used a Randomized Block Design (RBD) with six treatments giving pulutan leaf simplicia decoction (Urena lobata L.), namely 0%, 5%, 7.5%, 10%, 12.5% ​​and 15%, respectively the treatment repeated four times. Giving treatment for 15 days begins during the metestrus phase. The data tested for normality, homogeneity test, and analyzed by single ANOVA, and if they affected, it continue with Duncan test with P <0.05. The results of this research showed significant differences between the control group and treatments in the analysis of monolaminar primary follicles, multilaminar primary follicles, secondary follicles, de Graaf follicles and atresia follicles. Concentration of decoction simplicia pulutan leaves 7,5% begin to reduce the number of multilaminar primary follicles, and de Graaf follicles and begin to increase the number of follicles atresia, whereas at the concentration 10% begin to reduce the number of monolaminar primary follicles and secondary follicles. The conclusion of this study is that pulutan leaf simplicia decoction (Urena lobata L.) can reduce the number of follicles in monolaminar primary follicles, multilaminar primary follicles, secondary follicles, de Graaf follicles and increase the number of atresia follicles.

Keywords
decoction simplicia pulutan leaves (Urena lobata L.), the number of mice follicles

Topic
Biomedical Science

Link: https://ifory.id/abstract/fZxUe7cM3KvC

Corresponding Author
Ari Priharta

Institutions
Universitas Negeri Malang
STUST, taiwan

Abstract
A new S2 and S3 sounds detection by using heart rate signal taken from dorsalis pedis artery as a reference is presented in this paper. The aimed of this approach is evaluate the accuracy of the S1 and S2 sounds detection by using dorsalis pedis pulse measurement as reference. The dorsalis pedis pulse were measure by using MAX 30100 sensor controlled by microcontroller, meanwhile the heart sounds were capture by using ECG device. The measurement were taken for 5 minutes for totally 10 male and 10 female subject-s age 20 years. This experiments has been conducted for several times and the average were calculated and compared to the existing solution. The proposed approach gives a small error compare to the common S1 and S2 detection, which mean that the proposed detection method is acceptable as a promising solution.

Keywords
dorsalis pedis, heart beat, heart sounds, S1, S2

Topic
Biomedical Science

Link: https://ifory.id/abstract/chACbP9pU7qr

Corresponding Author
Ari Priharta

Institutions
Universitas Negeri Malang
STUST, Taiwan

Abstract
The wearable devices are gaining its popularity in recent days. This paper presents the performances of our smart shoes as a wearable biomedical device in capturing the heart beat signal from dorsalis pedis. In common, heart beat are measured from artery that located on chest, hand, fingertip and ear or neck. Even though the pulse from dorsalis pedis has a smaller amplitude compare to the other artery location, the integrated sensor on our smart shoes can capture the signal wih high precision. The experiment had been conducted for several times to 3 groups of age of the healthy male and female, there are kid, mature, and elder. The obtain results show that the smart shoes sensor could measure the the dorsalis pedis pulse accurately. Compare with the common measurement and other commercial devices, our device gives a small gap in rms error, which is acceptable for clinical need.

Keywords
accuracy, dorsalis pedis, heart beat, smart shoes, wearable device

Topic
Biomedical Science

Link: https://ifory.id/abstract/NKB8P2HdE7CR