Indonesia Conference Directory

Corresponding Author
Diah Rini Ratnaningsih

Institutions
* Pertamina
** UPN Veteran Yogyakarta

Abstract
The Ogan Komering Working Area has an area of 1,155 km2 located in the Ogan Komering Ulu District of South Sumatra Province. The Ogan Komering Working Area is currently operated by Pertamina Hulu Energi (PHE) Ogan Komering with a Gross Split Contract Agreement as of May 20, 2018. Waterflood project has implemented since 2006 in NEASD and GRH field. Ogan Komering Block has reached second peak production with 5,980 BOPD on early 2011. Because of plugging, the injection rate nowadays is only 16,000 BWPD when once it reached 40,000 BWPD. Remaining reserves in NEASD and GRH field is 4.04 MMBO based on updating GGR study in 2019. With enhancement injection rate, NEASD and GRH field are expected to increase 2-3 MMBO reserves. The further study about waterflood subsurface condition is conducted related to connectivity between injection well and production well also the injection performance in NEASD and GRH field to complete the target. From connectivity analysis supported with geophysic and geology interpretration, waterflooding in NEASD and GRH field consists of 4 areas which are A, B, C, and D. This analysis will be one of the guideline study for mature waterflood optimization. The connectivity between injection and production wells are important thing to optimize mature waterflood project. This paper report the tracer running result on 2006 and injection-production wells performance plot to evaluate reservoir connectivity. Tracer analysis was conducted to analyze the connectivity between injection and production wells. The tracer is injected to the several injection wells and will be expected to flow to the monitor wells considered as production wells. Several type of tracers were injected into 11 injection wells on June, 23rd until 27th 2006 and September, 10th 2006. The 11 injection wells are ASDJ-27, GRH-4, ASDJ-34, GRH-10, GRH-16, GRH-7, ASDJ-41, ASDJ-36, GRH-6, ASDJ-31, dan ASDJ-33 which is located in different section area which the injection wells has pattern peripheral. The tracer were expected to flow to the monitor wells (production wells) nearly located to the corresponding injector well. In Area A, tracer 158a in the amount of 100 liters was injected to ASDJ-34 and it was detected to ASDJ-22 after 453 days. However, performance plot shows that injection rate did not affect the liquid production rate. From geology interpretation, it is confirmed that there is minor fault in 1 km which is considered as minor leaking. Tracer 140c was injected to ASDJ-31 in Area B. In the span of time 553 days, tracer 140c was detected in ASDJ-74. The performance plot also confirmed that liquid production rate and oil production rate have a tendency of increment when injection well was started on June 2007. Several types of tracer were injected to Area-C but there were no tracer detection in monitoring wells. In Area D, Tracer 140c which was injected to GRH-6 was detected in GRH-22 after 70 days and Tracer 140a from GRH-10 was detected in GRH-13 after 927

Keywords
Connectivity Analysis, Tracer Wells

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/daP2kjh7E3ZH

Corresponding Author
Diah Rini Ratnaningsih

Institutions
1) Pertamina
2) UPN Veteran Yogyakarta

Abstract
ABAB Field is one of the fields operated by the Pertamina-EP Adera Business Unit located in South Sumatra. Found in 1951 and developed with a total of 137 wells with 8 productive reservoirs. As long as it is produced until now, in general, the category is still primary recovery, which is producing with natural energy capabilities from the reservoir. Although there is a small percentage of random water or peripheral water flooding. This is only intended for water disposal and at the same time to help maintain reservoir pressure. Reservoir that has been carried out by water injection is a reservoir of "A". This is because the driving mechanism in zone A is the drive depletion so that the reservoir pressure decreases quite rapidly and the lens shape is reservoir. The thickness of the average reservoir rate "A" is 20 ft. The "A" zone is a sand reservoir from Talang Akar, has OOIP = 52,823 MMSTB. Cumulative production until 12/14/2012 = 15,955 MMSTB (RF = 30%). One of the wells that was used as an injection well with the aim of pressure maintenance is the ABB-082 well. The ABB-082 well was drilled in 1974 and produced from the reservoir "A". Because the swap results are not indicative of oil (oil) and from the results of the survey the pressure gradient is interpreted as a water gradient of 0.41 psi / ft, in 1975 the well was converted to injection wells. Structurally the position of ABB-082 is higher (up dip) compared to the surrounding wells with a conical reservoir. In 1990 the well was no longer an injection well with shut-in status. In 2004 the ABB-082 well blew out by removing gas after shutting down for approximately 14 years. The average gas production amounted to 0.15 MMSCFD for 1 year, from 2004 to 2005 and then producing oil in natural bursts with an average production rate of 200 BOPD for approximately 2 years, from 2005 to 2007. Until now This ABB-082 cumulative production is Np = 290,356 MSTB. Well base with OOIP = 280,666 MSTB, then RF = 35% is calculated. From the description of the data, the ABB-082 well is a phenomenon of injection huff & puff with water injection (water flooding).

Keywords
Huff & Puff, Water Injection

Topic
Petroleum and Geothermal Engineering

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

Corresponding Author
Eka Larasati Amalia

Institutions
Malang state polytechnic

Abstract
Daop 2 Bandung is one of the Indonesian railroad operations areas, under the administration of PT Kereta Api Indonesia (Persero). Daop 2 Bandung is currently experiencing a problem in predicting the number of passenger volumes. It is common for railway transportation services to experience passengers flows that increases or decreases in the volume which in turn causes the service of the PT. KAI becomes less optimum. Therefore, a forecasting information system is needed to forecast the volume of train passengers in the upcoming period. This study applied Double Exponential Smoothing method as a forecasting method. The data used is the number of passenger volume data for two periods, i.e. 2017 and 2018 periods. For forecasting accuracy, PE (Percentage Error) and MAPE (Mean Absolute Percentage Error) were used. The passenger volume forecasting results on the Executive Class category shows 946,824 with an error percentage of 11.9962%, the Business Class category shows 221,188 results with an error percentage of 21.6714%, and the Economy Class category shows 5,144,074 with an error percentage of 10.4366%

Keywords
Forecasting, Passenger, Double Exponential Smoothing

Topic
Information Systems Technology

Link: https://ifory.id/abstract/CNAhqDXmM893

Corresponding Author
MUh Nur Fitrah Fitrah

Institutions
a) Environmental Management, Hasanuddin University, Jl. Perintis kemerdekaan 10, Makassar, 90245, South Sulawesi, Indonesia.
*pittokla[at]gmail.com
b) Departement of Marine Science, Hasanuddin University, Jl. Perintis kemerdekaan 10, Makassar, 90245, South Sulawesi, Indonesia.
c) Departement of Forestry, Hasanuddin University, Jl. Perintis Kemerdekaan 10, Makassar, 90245, South Sulawesi, Indonesia.
d) Research & Development Center for Marine, Coast, & Small Islands , Hasanuddin University, Jl.Perintis Kemerdekaan km.10, Makassar, 95245. Indonesia.
e) GeoQuest Research Centre, Faculty of Science, Medicine and Health, University of Wollongong, Australia

Abstract
As the largest tropical archipelago country, Indonesia has the widest mangrove forest in the world. In consequence, degradation of this ecosystem could affect global carbon equilibrium with increased amount of carbon in the atmosphere and reduced stored carbon. One of the potential methods to estimate this carbon stock alteration is by using remote sensing technology. The purpose of this study is to estimate amount of above ground carbon (AGC) that can be sequestered by mangrove forest on Bauluang Island and to identify its alteration dynamics during twenty years, using Landsat imageries. Landsat-7 ETM 1997, 2002, 2007, and Landsat-8 OLI 2013, and 2018 were used in this study. Amount of carbon at sample points were calculated based on classified NDVI value and the correlation were identified using linear regression to determine the range of carbon value. Carbon accuracy test was conducted to see the level of accuracy of carbon estimation using NDVI. The result shows increased amount of carbon every year with value of determination coefficient (R2) of 0.69, which means NDVI has significant influence on increased carbon stocks. The estimated amount of carbon stocks calculated based on NDVI value are 0-0.1 = 7.11 tons / ha, 0.1-0.2 = 39.71 tons / ha, 0.2-0.3 = 46.45 tons / ha, 0.3-0.4 = 276.14 tons / ha and> 0.4 = 764.32 tons / ha with an average estimation of 262.26 tons / ha. The dynamics of carbon stock shifting over the last twenty years has been increased and also declined. Amount of carbon estimated in 1997 is 11,808.23 tons, 27,357.73 tons in 2002, 36,786.58 tons in 2007, 108,538.91 tons in 2013, and 66,911.73 tons in 2018.

Keywords
Remote Sensing, Carbon Estimation, NDVI

Topic
Coastal and Ocean Dynamics

Link: https://ifory.id/abstract/DdxFhw49CkMU

Corresponding Author
Ryan Bacsa

Institutions
UNIKOM UNIVERSITY

Abstract
The lives of people in cities that have complexity with all kinds of dynamics form a pattern of urban culture. The culture created arises because of saturation. New things can be born due to the diversity of cultures that meet each other. Including through art, the community fills the public space with a beautiful accent of viusalisation. Not continually taking to the streets, the growing world of creative industries, also created places that can gather many people. Where only eating, drinking coffee arrived at the event. Urban spirit in urban communities arises in creative industries. By creating these places, there are cafes that offer a touch of mural by several street visual communities The problem that arises is that with the proliferation of murals in the cafes in Bandung, there are also various types of works with different types of enrichment and different philosophical values. But in fact the public or the visitors of most cafes only see the work as an aesthetic element that is only enjoyed for entertainment or their selfie objects, without thinking about the meaning and purpose of the picture. In the end whether the murals still have a function as murals that have messages and meanings in them or only as an aesthetic element for the entertainment industrys interests only

Keywords
Mural Interior Cafe

Topic
Visual Communication Design and Interior Design

Link: https://ifory.id/abstract/pbtL3d4PgFEe

Corresponding Author
Mohd Hafis Yuswan

Institutions
a) Halal Products Research Institute, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
*hafisyuswan[at]upm.edu.my
b) Consortium of Malaysian Halal Institutes, Ministry of Higher Education, Block E8, Complex E, Federal Government Administrative Centre, 62604 Putrajaya, Malaysia.
c) International Institute for Halal Research and Training, Ground Floor, Block EO, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728 Kuala Lumpur, Malaysia.
d) Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.

Abstract
Laboratory operation requires relevant guidelines and standards to ascertain the halal laboratory to be accepted at the international level. Common worldwide guidelines and standards for laboratory are -International Organization for Standardization 17025- (ISO 17025), -Good Manufacturing Practice- (GMP), and -Good Laboratory Practice- (GLP). In halal analysis, the laboratory shall comply with ISO 17025, GMP, and -Good Hygiene Practice- (GHP) as stated in the -Manual Procedure for Malaysia Halal Certification- (MPPHM). This article predominantly discusses the basic requirement of laboratory operation, specifically for halal analysis. The study is based on a reliable primary source of several international guidelines and standards (ISO 17025, GMP, and GLP) as compared with -Malaysia Halal Standards-. The study shows that common worldwide guidelines and standards are components of halal laboratory with the addition of Islamic fundamental and practices. Consequently, the halal laboratory operates competently to generate a valid test result. Besides, the implication as such practice promotes confidence in the halal laboratory-s work both nationally and internationally, thus improves international trade.

Keywords
Halal analysis, ISO 17025, GMP, GLP, laboratory operation.

Topic
Halal Science and Technology

Link: https://ifory.id/abstract/rX4ybtAwqkaQ

Corresponding Author
I Gusti Ayu Agung Mas

Institutions
Institute of Technology and Health Bali

Abstract
HIV cases in housewives are still a problem in Indonesia. This affects of pregnant women with HIV who will give birth, however HIV examination in pregnant women should be done. One of the factors which influence pregnant women to do HIV examination is the level of knowledge of the pregnant women. The aim of this study this was to identify the factors associated with knowledge of pregnant women on HIV examination.This research employed analytic, cross-sectional design and conducted in Public Health Centre (PHC) II South Denpasar. The population of this study was 240 pregnant women who visited the PHC. There were 75 pregnant women involved in this study which were selected through consecutive sampling. A self-developed questionnaire was used to collect the data and a self-administered questionnaire was completed by all respondents. The data were analyzed by using Spearman Rho. The results showed that 70.7% of pregnant women in PHC II South Denpasar had less knowledge on HIV examination. It was also found that there was a correlation among education1, age2, social-economic3, experience4 and the level of knowledge of pregnant women on HIV examination (ρ value <0,001, 0,002, <0,001, and 0,010). Therefore, the PHC II South Denpasar is expected to increase the frequency of counselling meeting for pregnant women.

Keywords
HIV Testing, Pregnant Women, HIV/AIDS, and Level of Knowledge

Topic
Education and Learning

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

Corresponding Author
Nurul Istiqomarie

Institutions
a,b) University of Raden Fatah Palembang

Abstract
This study aimed to determine influence of using the PMRI approach to problem solving abilities of elementary school students in grade six. This research is an experimental research using technique used is saturated sampling. The media used in the PMRI approach in this study is transparent tape. Data collection technique in this study were tests and observations analyzed by looking for the average of the indicators of each student, normality test, homogenity test, and hypothesis testing using t-test see the effect of using the PMRI approach on students problem solving abilities. The result of the final analysis were using the t-test which obtained the results of t count > t table (12,354 > 2,261) with a significance level below 0,025 so it was concluded that the use of PMRi approach had a positive influence on students problem solving abilities.

Keywords
PMRI, Tranparent tape, Problem Solving Ability

Topic
Mathematics Education

Link: https://ifory.id/abstract/yhCGzvk3frbg

Corresponding Author
Eyus Sudihartinih

Institutions
Universitas Pendidikan Indonesia

Abstract
This study aims to obtain a general description of the analysis of mathematical understanding of prospective mathematics teachers in the conic concept with Rasch models. This study was pre-experimental with a type of one-shot case study involving students of prospective mathematics teachers in the second semester consisting of 29 women and 10 men at one university in Indonesia. This study uses a test instrument in the form of an essay question consisting of three questions designed by a research team that is a lecturer in analytic geometry courses. The results of the analysis of mathematical understanding of prospective mathematics teachers in analytic geometry lectures with the Rasch model show that only a small proportion of students have high mathematical understanding. The results of the Rasch model measurement to examine the instruments show that the items used are not reliable and cannot be accepted to measure the mathematical understanding of prospective mathematics teachers in the conic concept. So that further research is needed on the instruments and mathematical understanding of prospective mathematics teachers in conic concept lectures with the Rasch model.

Keywords
mathematical understanding, pre-experimental, analytic geometry lectures, Rasch models, Item-Response theory

Topic
Mathematics Education

Link: https://ifory.id/abstract/zNJbQRVvAX8D

Corresponding Author
Rini Pujiastuti

Institutions
1.Departmen of Physics, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia
2.Advance Material and Mineral Laboratory, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia

Abstract
Magnetic susceptibility is a magnetic vulnerability that is often measured in rocks for various purposes. In this study, magnetic susceptibility was applied to distinguish weathering in rocks in different environments i.e. beaches and mountains. The rocks used are igneous rocks originating from Mount Sikambe and rocks on the coast of Prigi beach in Trenggalek Regency. The rock samples taken are rocks that have not undergone weathering, are half weathered and perfectly weathered rocks. The rock was crushed to form like a gravel, then tested magnetic susceptibility (χlf and χhf). The measurement results of rocks that have not decayed to perfect weathering in the mountain area of Sikambe show that the value of low frequency magnetic susceptibility (χlf) has a range of values (521.63-745.76)x 10-8 m3/kg, while in the coastal area Prigi has a range of values (4.65 - 7.72) x 10-8 m3/kg. From the values of χlf and χhf can be calculated the value of frequency dependent susceptibility (χfd). The average fd value in Gunung Sikambe is 0.2%, indicating that magnetic mineral grains are in the range of multi domains (MD) and on the coast of Prigi is about 6.06%, indicating that magnetic mineral grains are in the range of pseudo single domains (PSD) and single domain (SD).

Keywords
Susceptibility Magnetic, Weathering

Topic
Rock Magnetism

Link: https://ifory.id/abstract/73wZa2VQ8kpx

Corresponding Author
Rina Astini

Institutions
University of Mercu Buana
rina_astini[at]mercubuana.ac.id

Abstract
According to the results of a survey of the Global Travel Intentions Study (GTIS) in 2015 related to research on tourist destinations in foreign destinations, it was found that 69% of Indonesian tourists take advantage of their vacations to shop, that figure is higher than tourists from the Asia Pacific region who only 68% global tourists recorded at 66%. This research was conducted to identify factors that influence the decisions of Indonesian tourists on shopping trips to Singapore. The object of this research includes workers in the Central Jakarta area. This study was conducted on 280 respondents. The data analysis method used is Structural Equation Modeling (SEM) with the Linear Structural Relationship (LISREL) program. The results of this study indicate that 237 respondents have visited Singapore 1-3 times with a percentage of 84,6%, The analysis also stated that cultural factors and social factors significantly influence the decision to travel shopping for Indonesian tourists to Singapore. While personal factors and psychological factors do not affect the decision to travel shopping for Indonesian tourists to Singapore.

Keywords
cultural factors, social factors, personal factors, psychological factors, and shopping tour decisions.

Topic
Consumer Behaviour

Link: https://ifory.id/abstract/vP39GjagpVq4

Corresponding Author
Ferli Septi Irwansyah

Institutions
a) Department of Chemical Education, UIN Sunan Gunung Djati Bandung, Indonesia
*ferli[at]uinsgd.ac.id

Abstract
The purpose of this study is to apply to learn using Augmented Reality (AR) to improve the spatial ability of alkane and cycloalkane conformation. The method of this study quasi-experimental control group pretest-posttest design for the second-semester students of the Chemical Education at UIN Sunan Gunung Djati Bandung. Data obtained by instruments to measure student activity during learning, completion of students on student worksheets, and pretest-posttest results for spatial abilities. Data collection techniques were carried out with tests, while data analysis was carried out with statistical methods with the help of SPSS version 23. The results obtained in student activities were categorized as very good (mean 86.3%), while the results obtained from the completion of LK were categorized very well ( mean 84.53), the results of the spatial ability test show an increase in spatial ability with N-gain results classified as moderate (mean 0.58). This study shows that the application of alkane and cycloalkane AR conformation can visualize the movement of an object that is abstract, thus increasing spatial ability. Therefore the implementation of alkane and cycloalkane AR conformation can improve the spatial ability of students.

Keywords
augmented reality; spatial ability; conformation, learning.

Topic
CHEMISTRY EDUCATION

Link: https://ifory.id/abstract/WLBVvR8Kgywr

Corresponding Author
Nanang Priatna

Institutions
1Departemen Pendidikan Matematika, Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229 Bandung, Indonesia, 40154

Abstract
Discovery learning adalah model pembelajaran dimana siswa bereksperimen, aktif terlibat dalam pembelajaran, mengkonstruksi pengetahuan mereka sendiri dan membuat kesimpulan aturan/konsep dari hasil eksperimennya. Teknologi komputer memungkinkan siswa belajar matematika dengan lebih mudah dan lebih berkembang, karena komputer dapat menghadirkan banyak media diantaranya teks, gambar, grafik, tutorial, video, animasi, simulasi dan game. Adanya software geogebra memungkinkan siswa untuk aktif dalam membangun pemahaman konsep geometri. Model discovery learning berbantuan geogebra merupakan suatu model pembelajaran yang melibatkan siswa aktif secara optimal, memungkinkan siswa melakukan investigasi, meningkatkan kemampuan pemecahan masalah yang mengintegrasikan keterampilan berpikir dan pemahaman konsep. Agar kompetensi guru terus berkembang sesuai dengan profesinya, maka guru harus selalu meningkatkan profesionalistasnya melalui program Pengembangan Keprofesian Berkelanjutan (PKB).

Keywords
Discovery Learning, Geogebra, Profesionalisme Guru

Topic
Pembelajaran

Link: https://ifory.id/abstract/LUbRCtTfPM92

Corresponding Author
Nanang Priatna

Institutions
1Departemen Pendidikan Matematika, Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229 Bandung, Indonesia, 40154

Abstract
Penilaian dalam proses pendidikan merupakan komponen yang tidak dapat dipisahkan dari komponen lainnya khususnya pembelajaran. Penilaian merupakan proses pengumpulan dan pengolahan informasi untuk mengukur pencapaian hasil belajar siswa. Pembelajaran abad 21 merupakan pembelajaran yang membutuhkan higher order thinking skills (HOTS). Higher order thinking skills merupakan keterampilan untuk melatih siswa dalam menyelesaikan persoalan yang akan dihadapi di masa yang akan datang. Dalam mewujudkan visi pendidikan tahun 2025, yaitu menciptakan insan Indonesia cerdas dan kompetitif, diperlukan guru yang profesional dalam menjalankan tugas pokok dan fungsinya. Oleh sebab itu, profesi guru harus terus dilakukan dan ditingkatkan sebagai profesi yang bermartabat sebagaimana diamanatkan dalam Undang-Undang Nomor 14 Tahun 2005 tentang Guru dan Dosen. Konsekuensi guru sebagai profesi adalah program Pengembangan Keprofesian Berkelanjutan (PKB).

Keywords
Penilaian, Higher Order Thinking Skills, Profesionalisme Guru

Topic
Pembelajaran

Link: https://ifory.id/abstract/2aFJK8vqRzwQ

Corresponding Author
Amanda Amanda

Institutions
Universitas Muhammadiyah Yogyakarta, Indonesia

Abstract
Basically, all sharia-based institutions have an applicable legal basis where the legal basis must refer to the Quran and Hadith. Likewise with Islamic banking in getting profits. Where Islamic banking must comply with Islamic Principles which are actually the basis of Islamic banking operations. The purpose of this study was to analyze whether Sharia Compliance and Islamic Corporate Governance had an effect on profitability in Islamic Commercial Banks in Indonesia for the period 2013-2017. In this study, the Independen variable are Sharia Compliance and Islamic Corporate Governance. Sharia Compliance consists of 4 indicators, namely Profit Sharing Ratio (PSR), Islamic Investment Ratio (IIR), Islamic Income Ratio (IsIR), and Zakat Performance Ratio (ZPR) while Islamic Corporate Governance with Self Assessment as an indicator. Dependent variable in this study is Profitability using the indicator of Return on Assets (ROA). The sample was chosen using a purposive sampling method where the total sample used in this study was 7 Islamic Commercial Banks with 5 years of observation period. Secondary data used in this study was carried out with documentation data collection techniques. The analytical method used is Partial Least Square (PLS). The test results show that Sharia Compliance has a significant and positive effect on profitability. While Islamic Corporate Governance has no significant and negative effect on profitability.

Keywords
sharia compliance, Islamic corporate governance, profitability and Islamic Banks.

Topic
International Conference on Islamic Studies in the Digital Era

Link: https://ifory.id/abstract/T6eMryZWx2NB

Corresponding Author
Anwar Dolu

Institutions
1). Universitas Tadulako
2). Institut Teknologi Bandung

Abstract
Beban acak gelombang laut dan tekanan angin mempunyai sifat yang nilai sesaatnya tidak dapat diramalkan dalam waktu yang akan datang. Dalam analisis dan rekayasa diperlukan nilai-nilai dominan berdasarkan sifat dan keteraturan statistik sampai derajat tertentu yang berguna dalam perencanaan rekayasa. Dalam kajian ini, struktur yang ditinjau adalah menara lepas pantai dan beban luar acak adalah gelombang laut dan tekanan angin. Persamaan diferensial gerakan dari struktur menara dalam domain waktu ditransformasi ke domain frekwensi menggunakan Transformasi Fourier, yang diperoleh tanggap kepadatan spektrum (spectral density response). Untuk beban luar acak gelombang laut berdasarkan spektrum Pierson-Moskowitz dan JONSWAP dan tekanan angin berdasarkan spektrum von Karman-Harris, maka diperoleh tanggap varians perpindahan dan tanggap standar deviasi perpindahan. Untuk beban acak P(t) dengan asumsi eksitasi Gaussian dan tanggap perpindahan X(t) juga Gaussian, maka probabilitas tanggap perpindahan X(t) akan terlampaui 3.SD adalah 0.26%, yang merupakan desain batas aman perpindahan statik (X) secara praktis dari sudut pandang dinamika struktur

Keywords
Beban Acak, Gelombang Laut dan Angin, Struktur Menara, Transformasi Fourier, Tanggap Statistik, Spektrum Pierson-Moskowitz dan JONSWAP, von Karman-Harris, Gaussian, Standar Deviasi Perpindahan

Topic
Komputasi dan Pemodelan

Link: https://ifory.id/abstract/fz3tkBmnhcYW

Corresponding Author
Evi Puspitasari

Institutions
Universitas Muhammadiyah Yogyakarta

Abstract
The important element in extensive reading, a second language reading approach, is materials to read. Finding right materials is the biggest mission to achieve the goal of the approach which is reading for pleasure or reading engagement. This research aims at uncovering a trend of books selected by EFL students for extensive reading and elaborating students- perception about what makes them engaged with the chosen books. To meet the purpose, this research employed mixed method design by distributing a questionnaire about book choices to 123 university freshmen and interviewing two male and four female students to understand aspects of the book that influenced their reading engagement. Top six students favorite books are romance (65.85%), comedy (53.66%), children story (46.34%), adventure and fantasy (45.52%), horror and creepy-pasta (24.39%), and mystery and detective (24.34%). Meanwhile, according to the interview results, aspects of the books affecting their reading engagement are students connection and language appropriacy. The drawn conclusion is that in order to gain reading engagement, both students and teachers should understand students personal and English level information so that they could choose books with appropriate level of English that the students can relate.

Keywords
Book selection, extensive reading materials, reading engagement

Topic
International Conference of English Language Teaching, Literature & Linguistics

Link: https://ifory.id/abstract/WtLd2ZQuv8fF

Corresponding Author
Amanda Amanda

Institutions
Universitas Muhammadiyah Yogyakarta, Indonesia

Abstract
Mushroom demand is quite high in the market because mushrooms are one type of vegetable that is consumed by many people because of their delicious and highly nutritious taste. Mushrooms are also a good source of minerals. To obtain some great mushrooms indeed they are needed a medium to grow the mushroom. Its medium is called baglog where the mushroom could grow healthy depends on its material composition inside and how to make the form of baglog. But nowadays our partner Rumah Kebun Jamur Sleman, the producer of baglog mushrooms frequently lack of ability to produce lots of baglogs request from consumer. A day, the minimum demand of baglog reach 1300 baglogs, but our partner only could produce 800 baglogs a day. From that matter, FAMBORES (Fast Filling Machine and Baglog Suppressor) could be the best solution to increase the baglog mushroom product. In the design, FAMBORES is using 1 House Power (HP)s motor, worm gearbox with ratio 1:50 as its reducer, there are 5 holes to hang the plastic and only in 12 seconds could obtain 1 baglog.

Keywords
Baglog mushroom, FAMBORES, baglog machine

Topic
International Symposium of Engineering, Technology, and Health Sciences

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

Corresponding Author
Siti Nur Aisyah

Institutions
Universitas Muhammadiyah Yogyakarta, Indonesia

Abstract
This research was conducted using observation method by collecting the primary and secondary data. Primary data were soil characteristics which determined using the laboratory analysis procedures, while secondary data were supporting information obtained from local government agencies. The results showed that the sandy beaches of Parangtritis beach had a sandy texture, very fast soil drainage, effective depth of low to moderate soils, low salinity, low cation exchange capacity, percentage saturation of medium to high bases. Based on the results of the analysis of primary and secondary data, actually the sandy land of Parangtritis beach is categorized into land suitability class S3r-1; r-2 for soybean plants, with soil drainage and texture as a limiting factor. Potentially, to reduce the negative effects of existing limiting factors, the addition of large amounts of organic matter, in-organic amendments, and NPK fertilizer is highly recommended.

Keywords
Sandy coastal land, Land suitability, Limiting factors, Combination of organic matter, In-organic amendment and in-organic fertilizer

Topic
International Conference on Sustainable Agriculture

Link: https://ifory.id/abstract/U89rzRfXtkQp

Corresponding Author
Gatot Supangkat Samidjo

Institutions
Universitas Muhammadiyah Yogyakarta, Indonesia, sarjiyah[at]umy.ac.id

Abstract
This research aimed to determine the source of auxin which can increase the growth of tea cuttings. This research was conducted in the Tanjungsari plantation unit of PT Tambi tea nursery, Wonosobo and the Research Laboratory of University of Muhammadiyah Yogyakarta, from February to August 2018. The experiment was a single factor experiment arranged in a Completely Randomized Design (CRD). The tested treatments were auxin sources consisting of IBA 6.000 ppm, Rootone-F paste, 10% goat urine, 70% shallot and without auxin addition. The result showed that the addition of IBA 6.000 was able to improve the rooting percentage of the tea cuttings. The addition of 10% goat urine and 6,000 ppm IBA significantly increased root length and leaf area of the tea cuttings.

Keywords
IBA, Rootone-F, goat urine, red onion

Topic
International Conference on Sustainable Agriculture

Link: https://ifory.id/abstract/G8cTPWv3d9wa

Corresponding Author
Ahmad Zaki

Institutions
(1)
Department of Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, Bantul, Yogyakarta 55183, Indonesia, ahmad.zaki[at]umy.ac.id

(2)
Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia, zainah[at]um.edu.my

(3)
Department of Mechanics of Materials and Constructions, Vrije Universiteit Brussels, Pleinlaan 2, Brussels 1050, Belgium, daggelis[at]vub.ac.be

Abstract
The acoustic emission (AE) technique, one of the NDT (non-destructive method), is more effective for assessing corrosion in the concrete structures. The main objective of this study is to utilize the AE technique for assessment of pre-corroded concrete specimens under load testing. The experiments were utilized for small scales of pre-corroded specimens subjected to monotonic loading for AE signals. For the result of the experiments, the AE parameters include the AE hits, RA value, and AF of the AE data were successfully introduced to assess the flexure behavior of the pre-corroded beam specimen. The experiments conducted in this research helped to understand the flexural behavior of the pre-corroded specimen under loading test using the AE technique.

Keywords
AE, NDT, corrosion, concrete, flexural behaviour

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/9rqbFZJRMQgA

Corresponding Author
Siti Nur Aisyah

Institutions
Universitas Muhammadiyah Yogyakarta, Indonesia

Abstract
Vanda tricolor orchids are endemic to the slopes of Mount Merapi, Yogyakarta Province, Indonesia. The mountain slopes and eruptions in 2006 have destroyed 80% of the habitat and threatened the existence of these orchids. In addition, the exploitation of Vanda tricolor out of its natural habitat by the community for collection or selling it outside the area has reduced the orchid population. Therefore, efforts should be carried out to improve technology to reproduce and regenerate Vanda tricolor orchids. One of alternative to regenerate Vanda tricolor is using multiplication technique through in vitro and ex vitro cultures. The objective of this study was to determine the best type and concentration of cytokinin for the multiplication of Vanda tricolor PLBs. The experiment was arranged in a completely randomized design with single factor consist of 7 treatments id est medium without cytokinin, BAP 0.5 mgL-1, BAP 1 mgL-1, TDZ 0.5 mgL-1, TDZ 1 mgL-1, Kinetin 0.5 mgL-1 and Kinetin 1 mgL-1. Parameters observed in this study were a percentage of live, browning and contamination explant, the diameter of PLB, the emergence of shoots, the percentage of explant sprouting, the number of buds, the emergence of roots. The data were analyzed by using The Analysis of Variance at α=5% and further tested using Duncan Multiple Range Test (DMRT) at α=5%. The results showed that BAP 0.5 mg / L was the best cytokinin for multiplication of Vanda tricolor PLBs.

Keywords
Vanda tricolor,Tissue Culture, Cytokinin, Multiplication

Topic
International Conference on Sustainable Agriculture

Link: https://ifory.id/abstract/m6fZqyGF4Vxz

Corresponding Author
Amanda Amanda

Institutions
State University of Makassar

Abstract
Errors usually occurred due the lack of learners‟ knowledge. In learning a language especially to communicate, it is important to access speaking by mastering the skill of speaking. This study aims to analyze and describe the grammatical and the sources of errors in spoken English made by the English Language Learners (ELL) of STKIP Muhammadiyah Bulukumba. The sample of this research was the fourth semester students of the English Education Department of STKIP Muhammadiyah Bulukumba. The subject of this study was 35 students. This research applied qualitative research that describes the types and sources of students‟ errors taken from oral test. The errors were identified and classified according to the traditional English grammar. The findings showed that verb groups are the most common errors made by the English Language Learners (ELL) of STKIP Muhammadiyah Bulukumba. In regard to sources, it was found that intra-lingual transfer was the major source of errors. The English Language Learners (ELL) who has learned English as a foreign language still confused with the grammatical form of the English language. During the speaking test most of English Language Learners (ELL) was nervous so it affected their accuracy, fluency, and comprehension in speaking.

Keywords
error, grammatical errors, spoken English

Topic
International Conference of English Language Teaching, Literature & Linguistics

Link: https://ifory.id/abstract/naG74YqWX6bh

Corresponding Author
Amanda Amanda

Institutions
Sriwijaya University, Indonesia

Abstract
Pursuant to Article 40 Paragraph (2) of Law Number 5 of 1990 on Conservation of Natural Resources and its Ecosystem, an individual who conducted crimes against protected wildlife is sentenced to a maximum of 5 (five) years imprisonment and a maximum fine of Rp 100,000,000. In the United States, the Endangered Species Act (ESA) charges the perpetrator against wildlife with criminal and civil sanctions. In § 1540 (a) (1) determines that anyone who “take”, import, export, transport or sell endangered species can be fined not more than $ 25,000. If the species in threatened groups, the perpetrator can be subject to a penalty of not more than $ 12,000. The enforcement of criminal sanctions against perpetrators who violate ESA criminal provisions must fulfill the element of "knowing." An individual who knowingly "taking", entering or importing, issuing or exporting, transporting or selling endangered species prohibited by the ESA are subject to sanctions maximum fine not more than $ 50,000 and imprisonment for 1 year. If the action against the species under threatened group, the offender may be subject to criminal sanctions of a maximum of $ 25,000 and imprisonment for a maximum of 6 months. In addition, additional crimes were also applied in the form of revocation of federal permits, rental permits, and hunting permits, as well as confiscation of all equipment and transportation equipment related to these violations. This study analyzed the enforcement of criminal sanctions in criminal cases against protected animals in courts in Indonesia and the United States. The results of the study showed that criminal sanctions against criminals against protected animals in Indonesia have never reached maximum imprisonment or maximum fines so that they are not sufficient to provide a deterrent effect for the perpetrators and become a warning to other communities. While the imprisonment sanction for criminals against protected animals in the United States is still relatively weak. However, in terms of criminal fines and civil sanctions can be categorized as high sanctions

Keywords
protected wildlife, threatened wildlife, criminal sanctions, civil sanctions.

Topic
ASIAN Conference on Comparative Laws

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

Corresponding Author
Diah Kesumawati

Institutions
Biology Department
Postgraduate Program
Universitas Negeri Medan

Abstract
This study aimed to determine the effect of the application of contextual-inquiry based worksheets on students scientific process skills in the sixth semester of biology education undergraduate students in FMIPA UNIMED. This study used a quasi-experimental method with one dependent variable with 3 (three) classes as sample which are determined by random class. Regular class A got the treatment of applying contextual inquiry worksheets, Extension class A got the treatment of applying PBMP worksheets (empowering thinking through questions), Extension class B (control) got treatment for applying conventional worksheets. The research instrument was a list of description questions to test scientific process skills. Data analysis techniques used covariate analysis (ANACOVA) at a significant level a = 0.05 with SPSS 23 for Windows. The results showed that there was a significant effect of among the scientific process skill results, namely inquiry-based worksheets, contextual PBMP, conventional on with F = 4.364, P = 0.016. The results of this study stated that contextual inquiry worksheets can improve students scientific process skills.

Keywords
Scientific Process Skills, Microbiology, Student Worksheet, Contextual Inquiry

Topic
Teachers Education Model in Future

Link: https://ifory.id/abstract/ex8VEgN4ZkGh

Corresponding Author
Hafidatul Husna Siregar

Institutions
UNIMED

Abstract
This study aimed to determine the effect of the application of project based learning and problem based learning to the students High Order Thinking Skills in the fifth semester of biology education undergraduate students in FMIPA UNIMED. This study used a quasi experimental method with one dependent variable and a study sample of 3 (three) classes determined by random class. Regular class C got treatment for the application of project-based learning, Extension class A got the treatment of application of problem based learning, Extension class B (control) got direct learning treatment. The research instrument was a list of description questions to test students high order thinking skills. Data analysis techniques used covariate analysis (ANACOVA) at a significant level of a = 0.05 with SPSS 23 for Windows. The results showed that there was a significant effect among project based learning, problem based learning and direct learning to high level thinking skills with a value of F = 24,150, P = 0,000. The results of this study stated that the application of project based learning can improve students high order thinking skills.

Keywords
High order thinking skills, Microbiology, Project based learning, Problem based learning.

Topic
Teachers Education Model in Future

Link: https://ifory.id/abstract/JUEdV4W6yzvG

Corresponding Author
Desy Andarini

Institutions
Social Anthropology
State University of Medan
Medan, Indonesia

Abstract
This study aims to describe education based on local wisdom, namely Marsialapari, which is owned by salak farmers in terms of leasing salak farms in Sibangkua Village, Angkola Barat sub-district, South Tapanuli Regency. The purpose of this study is to find out and get an idea of the value and meaning of Marsialapari local wisdom education that is owned by salak farmers in Sibangkua village, Angkola Barat District, South Tapanuli Regency. This research is descriptive qualitative using an ethnographic approach, data collection is done by in-depth interviews with informants, documentation and participant observation. Next is to do data analysis techniques by making ethnographic notes, conducting ethnographic interview analysis, and ethnographic writing. The results of this study can be seen that education based on Marsialapari local wisdom on zalacca farmers in Sibangkua Village, Angkola Barat Subdistrict, South Tapanuli Regency has the value and meaning of education for the village community. The community of Sibangkua Village is an ethnic Batak Angkola, Toba, and Mandailing. The value and meaning of education based on Marsialaparis local wisdom on salak farmers is to maintain harmony and inter-ethnic harmony in terms of leasing salak farm land to the village community to protect their natural wealth.

Keywords
Education, Local Wisdom, Marsialapari

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/LnymVegxK3cw

Corresponding Author
Ahmad Dahlan Siregar

Institutions
1Educational Technology, Postgraduate Program, State University of Medan, Nort Sumatera, Indonesia
2State University of Medan
*Corresponding Author: ahmaddahlan26[at]gmail.com

Abstract
This study aims to: (1) produce appropriate Compact Disc (CD) learning products according to material experts, media experts, design experts and users, (2) find out the usefulness of products through the completeness of student learning outcomes. This research is research and development that uses the Dick and Carey model. The development procedure includes the analysis, design, validation, final product stages. In the analysis and design phase, a survey was conducted in the field to analyze student needs. The design stage is tailored to the needs of learning activities. The development stage, the validation of material, media, design and user experts then revised the product. The implementation phase in class VII of SMP Negeri 35 Medan in 32 students. The results of this study are as follows. (1) Learning CDs are declared feasible based on the results of material expert validation with a score of 91.83, media experts with a score of 91.69, design experts with a score of 90.24, with very good categories and users declaring 100% with criteria strongly agree (3) Effectiveness of Learning CD proven by improvement student learning outcomes from 59.58 to 69.06. Student responses generally respond positively.

Keywords
Compact Disc, problem based learning, Craft

Topic
Curriculum, Research and Development

Link: https://ifory.id/abstract/zRtf7mNPMU6n

Corresponding Author
Adryan Rachman

Institutions
Sekolah Tinggi Ilmu Ekonomi Indonesia Membangun (STIE INABA), Universitas Pendidikan Indonesia

Abstract
This study discusses the importance of using the internet to improve competitiveness with other universities. School of Economics (STIE) INABA Bandung has a website that is www.inaba.ac.id that serves as a communication medium that can provide information for students, lecturers, and the general public. This research was made to analyze the effect of website design and the quality of information on user satisfaction over website service by distributing 39 questionnaires to postgraduate students of semester 1 academic year of Management Studies 2019 as respondents. This research uses a quantitative method. Using the structural equation method model - partial least square SEM - PLS. Research shows that website design and quality of information affect user satisfaction over website services.

Keywords
User Satisfaction, Web Design, Information Quality, Innovation Value, Technology, SEM, PLS

Topic
Marketing Management

Link: https://ifory.id/abstract/6Cy2m9q3AjUx

Corresponding Author
Rizal Nazarudin Firli

Institutions
a. Researcher in STEI Tazkia
b Staff and Researcher in LPPM STEI Tazkia

Abstract
Nowadays, Sukuk is still constrained in liquidity is certainly in the spotlight together. Especially seeing the potential of Sukuk very large, it is expected that liquidity problems did not interfere with these potentials. The author will discuss any Sukuk development strategy in dealing with these problems. And whether some internal factors Sukuk relations have a positive relationship to the Sukuk liquidity itself. The author will discuss the econometric approach VAR / VECM about the influence of several factors in liquidity, as well as interviews approach to address needed solutions and strategies. The discussion will focus on the Sukuk (Project Based Sukuk) PBS-001 in PBS Sukuk liquidity side. The primary factor in data processing Sukuk liquidity, the data will focus on frequency, volume, Nominal Outstanding, Yield and maturity in the year 2012-2016. It is known that in the short term Outstanding Nominal variables positively affect PBS dominant at 2.86825, while the long-term variable volume PBS negatively affect predominantly of -6.74084. Based on the test results of the IRF, the effect of shocks when the Shock to a variable volume, Nominal Outstanding, Tenor, and Yield in the early months are very volatile but started balanced at month 13. Based on interviews, on average, they say that the solution can be given for moment Sukuk is that liquidity is increasing Stock Outstanding Nominal Building or reproduce.

Keywords
Liquidity, Secondary Market, Project Based Sukuk (PBS)

Topic
Sukuk

Link: https://ifory.id/abstract/NQLH3MnbkgvP