Indonesia Conference Directory

Corresponding Author
Maria Artanta Ginting

Institutions
a) Industrial and Financial Mathematics Research Group, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung 40132, Indonesia
*mariaaginting[at]s.itb.ac.id
b) School of Computing, Telkom University, Jl. Telekomunikasi No. 01 Terusan Buah Batu, Bandung 40257, Indonesia

Abstract
In conducting water wave simulations, the correct implementation of boundary conditions is important to obtain accurate wave dynamics in the computational domain. For assessment of coastal structures such as breakwaters, where both transmitted and reflected waves are present in the computational domain, we often need to observe simulation behavior for somewhat long period of time. In this case, applying a transparent boundary condition is necessary, a condition that allows transmitted wave propagates to the right, whereas reflected waves propagates to the left, at all times. In this paper, we propose a transparent boundary condition which derives from the embedded wave generation method of Liam et al. [2014]. In this paper, the method is implemented to the momentum conservative scheme of the shallow water equations, and conduct a simulation of wave reduction due to a submerged breakwater with certain dimension. Further, we measured the reflection and transmission coefficients and compare it with the analytical formulas.

Keywords
Transparent boundary condition; Embedded influxing; Momentum conservative scheme; Shallow water equations; Reflection and transmittion coefficients

Topic
Coastal and Ocean Dynamics

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

Corresponding Author
Prayudha Hartanto

Institutions
Geospatial Information Agency

Abstract
Accurate and high-resolution water depth information are important for wide range of coastal research and monitoring. In this case, providing an accurate bathymetric map is a major challenge for remote sensing. This study developed and evaluated a semi-parametric regression to extract depth information using various image datasets (Landsat 8, Sentinel 2A and Worldview 2). We compared the ability of these imageries to map depth information using generalized additive model (GAM). GAM is a semi-parametric generalized linear model which allow for nonlinear relationships between covariates and the target variable. We used the Morotai shallow water area in Indonesia to apply GAM in deriving depth information. We found that higher image spatial resolution results in higher mapping accuracies. This study highlights the potential of selected images and mapping techniques for deriving bathymetric data.

Keywords
bathymetry;SDB;depth;shallow water;GAM;regression model

Topic
Marine Geodesy and Satellite Oceanography

Link: https://ifory.id/abstract/QVmyzj3WYqcN

Corresponding Author
Marsya Jaqualine Rugebregt

Institutions
Research Center of Oceanography - LIPI

Abstract
Abstract. Changes in pH, temperature, and salinity in seawater can indicate the occurrence of ocean acidification. This study aims to study changes in acidity that occur in Ohoililir waters, Southeast Maluku, which is part of the Banda Sea. This research was conducted in March 2019 as a study of the prefix of oceanic equities in the Southeast Maluku region which is part of the Banda Sea which is currently one of the priority researches in Indonesia, and sampling at 10 points associated with coral reefs and seagrass ecosystems. The results obtained were pH ranging from 8.567 – 8.851 with an average of 8.6879, temperatures ranged from 29.285 – 30.281oC with an average of 29,7412°C, and salinity ranged from 33.041-33.33 with an average of 33,2355. Its shows that pH, temperature, and salinity of Ohoililir waters are still a good range for the life of marine biota.The correlation between pH and temperature is -0.097 and the correlation between pH and salinity is in the range of -0.054 which indicates has no relationship between pH and temperature and salinity. Beside that, pH has negative correlation to temperature and salinity. This shows the need for further research on the relationship between these three or more parameters to see the effect on ocean acidification.

Keywords
pH, temperature, salinity, ocean acidification, Ohoililir

Topic
Coastal and Ocean Dynamics

Link: https://ifory.id/abstract/JTBMgxRNw6nj

Corresponding Author
Nanda Nur Anugrah

Institutions
a) Marine Science Department, Hasanuddin University
Jl. Perintis Kemerdekaan 10, Makassar, 90245, Indonesia.
b) Institute for Marine Research and Observation, Ministry of Marine Affairs and Fisheries, Jl. Baru Perancak, Negara, Jembrana - Bali 82251.

Abstract
The Makassar Strait is one of the main gate of Arus Lintas Indonesia (Arlindo) which carries water masses from the Pacific Ocean and causes Makassar Strait waters affected by the El Nina and La Nina phenomenon. This study aims to observe the oceanographic characteristics of the Makassar Strait when El Nino and La Nina phenomena occur by looking at the changes in temperature, salinity, and currents from 2009-2010. The data used in this research are sea surface temperature data (CMEMS), Salinity (CMEMS) and current speed (CMEMS) which are processed using Panoply applications and Sea Surface Temperature data from Climate Prediction Center (NOAA) processed into Oceanic Nino Index (ONI). In the period from 2009 - 2019 there were three times the ENSO anomaly phenomenon, which began with the El Nino phenomenon from September 2009 to March 2010, then La Nina in July 2010 to May 2011, and El Nino in May 2015 to May 2016 In each phase, the dynamics of oceanographic characteristics occur in the waters of the Makassar Strait which cause fluctuations in sea surface temperature, salinity, and currents that have interacted to each other

Keywords
El Nino, La Nina, Makassar Strait, Sea Surface Temperature (SST)

Topic
Coastal and Ocean Dynamics

Link: https://ifory.id/abstract/ZzeGD6Y9tHRC

Corresponding Author
Ignatius Tri Hargiyatno

Institutions
Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resources, MMAF

Abstract
Handline tuna fisheries in Palabuhanratu have developed since 2004 and categorized as small-scale fisheries. Economic sustainability is one of the objectives of the handline tuna operation. This paper aims to analyze the cost and revenues of tuna fishing resources by using a handline in Palabuhanratu. The results indicate the handline catch rate has increased from the years 2012-2014 with an average 657kg / trip. The investment cost of handline tuna fishing operation is $19,792.86,-, with depreciation charge of $5,525.00,-/year, maintenance cost amount $2,589.29,-/year and operational cost of $16,222,-/year. The revenue from the fishing business is $44,057,-/year. The business profit amount USD $ 301,-/trip or USD $ 7,217,-/year. Based on investment analysis the value of R / C = 1,32, PP = 1,86, NPV = $ 24,528.27,-, B/C = 5,27 and IRR = 119%, where it shows that fishing is profitable, with a relatively quick payback and sustainable.

Keywords
Cost, Revenue, handline, tuna, Palabuhanratu

Topic
Marine Resources, Conversation and ICZM

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

Corresponding Author
Hanif Santyabudhi Sutiyoso

Institutions
a) Study Program of Oceanography, Institut Teknologi Bandung, Indonesia
*santyabudhi[at]oceanography.itb.ac.id

b) National University of Ireland Galway, Ireland

Abstract
Rip currents are hydrodynamic events that vary alongshore and important to be well-understood for its uniqueness and safety issues on recreational beaches. In this study, bathymetrically-controlled rips are the main focus as this type is commonly found on Indonesia-s coastal areas, particularly in the south coast of West Java. This unique hydrodynamics feature affects sediment characteristic, particularly at the rip channel as the lower part tends to have coarser sediment due to larger friction. Such complex interactions need thorough investigation, therefore, a study was conducted in Pangandaran which well-known for its rip currents. Field observation was made to collect sediment sample on a cross-shore direction which shows finer sediment on upper rip channel and coarser sediment on the lower part with a diameter size of 0.35 mm and 0.37 mm, respectively. In addition, simple simulations were also made to illustrate rip current movement on a channel. The result shows that in the strongest current area with over than 3.0 m/s current speed, i.e. on the lower part of the rip channel, bed shear stress is found to be the strongest. It is been noticed as well that the bed shear stress forms a pattern which delineates overall movement of a rip current. Furthermore, the variation of bed shear stress is revealed as the main cause of sediment distribution along the cross-shore direction. Therefore, this simple approach qualitatively illustrates the dynamics of a rip current phenomenon.

Keywords
rip current, coastal morphology, sediment, Delft3D

Topic
Coastal and Ocean Dynamics

Link: https://ifory.id/abstract/nKE4vQRUukT2

Corresponding Author
Riski Indah

Institutions
Faculty of Mathematics and Science, Mulawarman University, East Kalimantan

Abstract
Mahakam Delta is a delta with unique characteristics. As a result of the continuous sedimentation process, the delta can be said as a complex delta because it has dozens of tributaries that are interconnected and flow into the sea to their estuaries. Mahakam Delta estuary is a meeting place for mixing masses of water from freshwater rivers and high salinity rivers. The aim of this study is to determine the water column stratification seen from the salinity and temperature parameters in the Mahakam Delta estuary. This study uses the ECOMSED model which is run for 40 days (July 7 to August 16, 2018) with tides and river discharge as the generating force. The simulation results show that stratification is predominantly influenced by differences in salinity between the layers. The strongest stratification is located in the upper Mahakam Delta line with a difference in salinity is 8 ppm from surface to bottom layer.

Keywords
Mahakam Delta Estuary; Salinity; Temperature

Topic
Coastal and Ocean Dynamics

Link: https://ifory.id/abstract/kZVy7Gpb9NKj

Corresponding Author
Purwanti Sabrina

Institutions
a) Department of Earth Science, Faculty of Earth Science and Technology, Institute Technology of Bandung, Indonesia
*purwanti22lelly[at]gmail.com
b) Balai Perikanan Budidaya Laut Ambon, Direktorat Jendral Perikanan Budidaya, Ministry of Marine Affairs and Fisheries Republic of Indonesia

Abstract
Abstract. Inner Ambon Bay has been used as a location for fish farming. The mean seasonal of chemical parameters as much as 3,92 – 6,52 ppm for dissolved oxygen, the surface concentration of nitrate and phosphate each one is 0,05 – 0,143 ppm and 0,014 – 0,6 ppm, meanwhile the pH reach 7,95 – 8,44. The mean seasonal of physical parameters about 30,3 – 34,4 ‰ for salinity and the value of surface temperature is 26,5 – 31,5 °C. This research reviews the condition of an ecosystem in Inner Ambon Bay, consist of nutrients, phytoplankton, zooplankton, and detritus (NPZD) concentrations. The input model uses data on temperature and average nitrate concentration from Ambon Marine Aquaculture Center (Balai Perikanan Budidaya Laut Ambon) which is located on 3,63529 °S and 128,2312 °E. Model simulation is carried out for 4 years (2015 – 2018) with a time step of 6 minutes. The model simulation result shows that the mean nutrient concentration is 3,52 – 3,84 mmolC/m3. The verification of nutrient concentration from a model with observation data (nitrate concentration) used a statistics method. The value of RMSE is 0,05 mg/L or 0,5 mmolC/m3, meanwhile correlation is 0,41. The highest nutrient concentration occurred in the east season. It could be influenced by upwelling from Banda Sea that carried high nutrients from the surface.

Keywords
Model; NPZD; Nutrient; Seasonal

Topic
Marine Resources, Conversation and ICZM

Link: https://ifory.id/abstract/4Xa2kLMEUjCg

Corresponding Author
Rahaden Bagas Hatmaja

Institutions
Earth Sciences Department, Faculty of Earth Sciences and Technology, Bandung Institute of Technology

Abstract
In this research, Empirical Orthogonal Function (EOF) method is conducted to assess the dynamics of Indian Ocean characteristics, (i.e. sea surface temperature (SST) anomaly and equatorial wind), as the response of IOD for last 30 years (1988 – 2017). Based on the EOF analysis, IOD explains about 23.1% of the total variation of interannual SST anomaly (EOF second mode). While due to the equatorial wind components, IOD explains about 40.9% of the total anomalous zonal wind variation (EOF first mode) and 21.8% of the total anomalous meridional wind variation (EOF second mode). Based on the EOF and cross correlation analysis, its obtained some accurate indices and able to describe the dynamics of Indian Ocean during IOD events, such as SSTdyn (for SST anomaly dynamics), Udyn (for zonal wind anomaly dynamics), and Vdyn (for meridional anomaly dynamics). Moreover, based on the composite analysis of these Indian Ocean dynamics indices, during the five (six) positive (negative) IOD events from 1988 to 2017, the negative (positive) SST anomaly in the eastern Indian Ocean (0°–15°S dan 90°–120°E) followed by the positive (negative) SST anomaly in the western Indian Ocean (10°N–10°S dan 40°–60°E) and the central Indian Ocean (5°S–10°S dan 70°–80°E) occur in June and reach the peak in September-October. The anomalous SST is also accompanied by anomalous wind in the region of 5°N–10°S dan 70°–100°E, which starts by the occurance of anomalous northerlies (southerlies) meridional wind in June-July, continues by the occurance of anomalous easterlies (westerlies) zonal wind in the following month, and reaches the peak in October.

Keywords
Indian Ocean Dipole, Indian Ocean, sea surface temperature, equatorial surface wind, Empirical Orthogonal Function

Topic
Coastal and Ocean Dynamics

Link: https://ifory.id/abstract/KAk29p8CPVQF

Corresponding Author
Ni Luh Putu Mega Kartika Candra

Institutions
Institute of Technology and Health Bali

Abstract
The achievement of optimal development can be done by providing exclusive breast milk to baby up to 6 months, but the rate of exclusive breast milk is still low especially in Denpasar city. The purpose of this study was identify the correlation of providing exclusive breast milk with baby growth in the health service integrated post at Padangsambian West Denpasar. This research implemented analytical correlation design with cross-sectional and it held on February, 27th – April, 27th 2019. The population in this study were 103 babies aged 0-1 years old in the health service integrated post at Padangsambian West Denpasar as the respondents. The respondents were selected through simple random sampling technique. This study employed observation self-completed questionnaire with Pre Development Screening Questionnaire to collect the data. The data were analyzed by using Spearman Rho test. The result of Spearman Rho showed there was a statistically significant positive medium correlation between providing exclusive breast milk with baby growth (r = 0,46, p < 0,001). It can be concluded that the more fulfilled exclusive breast milk on baby, the better the baby growth. It is recommended to mothers to apply exclusive breast milk to achieve an optimal growth on baby.

Keywords
Exclusive Breast Milk, Growth, Baby.

Topic
Healthcare Practice and Services

Link: https://ifory.id/abstract/hzVrJtwG9LQp

Corresponding Author
I Wayan Bebby Agustin

Institutions
1Bachelor of Nursing Program, Institute of Technology and Health Bali, Jalan Tukad Balian No. 180 Denpasar, Bali, Indonesia
2 Bachelor of Midwifery Program, Institute of Technology and Health Bali, Jalan Tukad Balian No. 180 Denpasar, Bali, Indonesia

Abstract
One of therapy for chronic renal failures is hemodialysis. The problem that usually occurs in hemodialysis treatment is the patient therapy compliance. Patient compliance in undergoing therapy requires support from family members. The purpose of this study was to determine the correlation between the family support and the compliance on hemodialysis therapy in patients with chronic renal failure. This study employed a correlation analytic design with a cross-sectional approach. There were 136 respondents were recruited as the sample through convenience sampling technique. A self-constructed questionnaire was used in this study. The data were collected by using self-completed questionnaire. All respondents had completed the questionnaire. The data were analyzed by using Spearman-s rho statistical test. Among 136 respondents, 65,4% were male. The average age of the respondents was between 56 to 65 years old. There were 87.5% respondents had good family support. There were 88.2% respondents had good compliance. Statistical test results showed p-value <0.001 indicating there was a correlation between family support and compliance to patients underwent hemodialysis therapy. The patients family is expected to provide support for patients undergoing hemodialysis therapy. Therefore, patients will be obedient in undergoing a therapy program.

Keywords
Family Support, Compliance, Hemodialysis

Topic
Healthcare Practice and Services

Link: https://ifory.id/abstract/QrKqmpg4w8nb

Corresponding Author
Ni Putu Amelia Suarta Dewi

Institutions
1Bachelor of Nursing Program, Institute of Technology and Health Bali, Jalan Tukad Balian No. 180 Denpasar, Bali, Indonesia
2 Bachelor of Midwifery Program, Institute of Technology and Health Bali, Jalan Tukad Balian No. 180 Denpasar, Bali, Indonesia

Abstract
Caring behavior has an important role in providing care in the hospital. However, there are still patients give complaints about the attitude of nurses who are less friendly, less sympathetic and rarely smile; indicating that nursing services are still not optimal. The purpose of this study was to determine the correlation between nurse awards and length of working time in nurse caring behavior. This study employed an analytical research design with a cross-sectional approach. There were 215 respondents recruited as the sample which were chosen by using a stratified random sampling technique. A validated self-developed questionnaire was used in this study. Data collection was completed by using self-questionnaire and all respondents had been filled in completely. The data were analyzed by using Spearman-s Rho test. Among 215 respondents, 70.2% were female, the average age of the respondents was 25 to 30 years old. Length of working period was from 7 to 10 years. There were 73.5% of nurse awards were sufficient, and 50.7% of nurses caring behaviors were sufficient. Moreover, there was correlation between nurses awards (p <0.001) and length of working (p = 0.042) in nurses- caring behavior. The conclusion of this study is the nurses are expected to maintain the caring behavior because it is the basis of nursing science.

Keywords
Nurse Award, Length of Working, Nurse Caring Behaviour

Topic
Healthcare Practice and Services

Link: https://ifory.id/abstract/8GHJcvwU9kCz

Corresponding Author
ardi dwi susandi

Institutions
1, 2, 3, 4 State University of Malang, INDONESIA

Abstract
The strategies used in solving problems can be influenced by cognitive style. This research is a qualitative descriptive study. The purpose of this study was to describe the mathematical critical thinking skills of junior high school students based on the cognitive style of Dependent Field (FD) and cognitive style Field Independent (FI) in solving SPLDV problems. The subject of this study consisted of 1 student who had the FD cognitive style and 1 student who had the FI cognitive style chosen by purposive sampling. Data collection techniques were carried out by administering the cognitive style test of the Embedded Figure Test (GEFT) Group, mathematical problem solving tests, interview guidelines, and documentation. Data were analyzed based on FRISCO critical thinking category indicators (Focus, Reason, Inference, Situation, Clarity, and Overview) in each step of problem solving, namely understanding problems, arranging plans, implementing plans, and checking again. Data analysis is done by reducing data, presenting data, and drawing conclusions. The results showed that students who had the cognitive style of FD and students who had the cognitive style FI had good critical thinking skills in each step of problem solving according to Polya.

Keywords
Keywords: Critical Thinking Ability, Mathematical Problem Solving Questions, Cognitive Field Dependent Style (FD), Cognitive Field Independent (FI) Style, and Polya Problem Solving.

Topic
Mathematics Education

Link: https://ifory.id/abstract/LZxXb94hfARK

Corresponding Author
Tatang Muhtar

Institutions
Universitas Pendidikan Indonesia

Abstract
The utilization of Information and Communication Technology for the millennials is a requirement, one of which is in the learning of Physical Education (Penjas – Pendidikan Jasmani). The teachers are expected to develop the competencies in the mastery and utilization of ICT in the learning process. Therefore, this research aims at exploring the prospective physical education teachers- skills in the utilization of ICT in the process of physical education learning as an effort to instill healthy lifestyle behavior into prospective physical education teachers by using an Android-based 30 Day Fitness Challenge application.. The procedure of this research are: 1) searching the application, 2) understanding of the application, 3) conducting learning process through the application and 4) evaluating of the learning outcomes. This research was conducted in one of the universities in Sumedang Regency by involving 100 students of prospective physical education teachers, consisting of 65 male students and 35 female students. The findings revealed that the use of this application had an effect on healthy lifestyle behavior with the indicators, for example, 1) the subjects had the understanding of the steps in instilling healhy lifestyle behavior, 2) the increase in motivation affected the importance of healthy lifestyle behavior, and 3) the subjects were getting used to conduct sport activities through this application. Therefore the utilization of the 30 Day Fitness Challenge application was able to instill the healthy lifestyle character in the prospective physical education teachers in Sumedang Regency.

Keywords
Android-based application, healthy lifestyle behavior, physical education

Topic
Computer Science Education

Link: https://ifory.id/abstract/xvW9XCqZJn7R

Corresponding Author
Cahyo Puji Asmoro

Institutions
Universitas Pendidikan Indonesia

Abstract
This study was conducted to determine the effect of Ipomoea batatas L. leaf extract as flocculants on the reduction of Ca2 + and Mg2 + (hardness) levels in water treatment for chemical practicum on environmental analysis at the FPMIPA UPI Chemical Department. This study continued from previous research on the optimization of Ipomoea batatas L. leaf extract as a flocculant in water treatment, the results of the study showed that Ipomoea batatas L. leaf extract can make water clearer and provide greater reduction in turbidity value. In this follow-up study it will be carried out through two stages, the first step is optimizing the optimum processing parameters. The second stage is water treatment using optimum processing parameters, followed by hardness testing in water samples before and after processing. In hardness testing the EDTA titration method is used with the EBT indicator. The results showed the optimum parameters of water treatment with Ipomoea batatas L leaf extract as flocculant was pH 6.5, coagulant dose 50 mg / L, flocculant dose 2 mg / L, stirring coagulant speed 200 rpm for 5 minutes, and flocculant stirring speed 40 rpm for 5 minutes. In testing the total hardness as CaCO3, the initial sample (without treatment) obtained hardness of 285 mg / L, whereas in the sample treated with Ipomoea batatas L. leaf extract as flocculant hardness was obtained at 190 mg / L. From the results of the study it can be concluded that Ipomoea batatas L. leaf extract as flocculant in water treatment can reduce the hardness level in water.

Keywords
Biofloculan, Ipomoea batatas L., EDTA titration, Hardness.

Topic
Chemistry

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

Corresponding Author
Rr. Woeri Vive Khananda

Institutions
1. The DKI Jakarta Provincial Government Employee
and the student of Doctoral of Management Science
in Universitas Jenderal Soedirman Purwokerto
Central Java
2. Senior Lecturer of The Indonesia Christian University
Toraja and the student of Doctoral of Management
Science in Universitas Jenderal Soedirman
Purwokerto Central Java

Abstract
Knowledge Sharing is very important in an organization to improve a performance. Knowledge Sharing is one of the most important processes in knowledge management. Leaders are needed to create and maintain a culture of knowledge that is shared by an organization, especially in small and medium micro enterprises. Knowledge Sharing in organizations, especially Micro, Small and Medium Enterprise, different from large businesses. Knowledge sharing for MSMEs is usually done informally while in Corporate Business it is done formally. Trust is very important in carrying out knowledge sharing in MSMEs. Transformational leadership is very important in influencing a knowledge sharing in MSME organizations. The study was conducted on MSME employees. The sample used in this research was 160 sample. This study used multiple regression methods. The results of the study showed that there was a significant relationship between transformational leadership and knowledge sharing and trust in knowledge sharing.

Keywords
Trust, Transformational Leadership, Knowledge Sharing

Topic
Human Resource Management

Link: https://ifory.id/abstract/C2jxuUznLVy7

Corresponding Author
Denawati Junia

Institutions
a) Jurusan Fisika, Universitas Negeri Jakarta, Jl. Rawamangun Muka, RT.11/RW.14, Rawamangun, Kec. Pulo Gadung, Kota Jakarta Timur, Daerah Khusus Ibukota Jakarta 13220, Indonesia
*ce.rustana[at]yahoo.com
*denawati.junia[at]gmail.com
b) Jurusan Kimia, Universitas Negeri Jakarta, Jl. Rawamangun Muka, RT.11/RW.14, Rawamangun, Kec. Pulo Gadung, Kota Jakarta Timur, Daerah Khusus Ibukota Jakarta 13220, Indonesia

Abstract
One of the obstacles in utilization of rubber seed oil as a raw material for biodiesel production is contain of high free fatty acid about 12.19%. The process of biodiesel production from rubber seed oil would be more effective and efficient if done through a process of esterification and transesterification using heterogeneous acid catalyst because it is less corrosive, easily separated, and can reduce environmental pollution. However, the catalyst is relatively expensive. Therefore, it needs more economic alternatives. One of which is a heterogeneous acid catalyst from rice water. There are three production process, extracting the oil from seeds, catalyst preparation, and biodiesel production. The results of Biodiesel product contains methyl ester compounds of palmitic acid and oleic acid after going through transesterification process which means that the reaction was run. The EDS test results reported an SO3 group as part of a cluster -SO3H of catalyst from rice water.

Keywords
Biodiesel; Heterogenous Catalyst Acid; Rice Water; Rubber Seed Oil

Topic
Energy and environment materials

Link: https://ifory.id/abstract/8gNWPHdAc7eU

Corresponding Author
Mikhail G. Brik

Institutions
1. College of Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065, People-s Republic of China
2. Institute of Physics, University of Tartu, W. Ostwald Str. 1, Tartu 50411, Estonia
3. Institute of Physics, Jan Długosz University, Armii Krajowej 13/15, PL-42200 Częstochowa, Poland

Abstract
First-principles methods of calculations of electronic and optical properties of impurity ions in solids allow for a quantitative treatment of microscopic crystal field effects. In other words, they give a possibility of calculating the impurity ions energy levels for different geometric configurations of impurity centers, including changing chemical bond lengths and angles between those chemical bonds. From these calculations, it is possible to extract the distance dependence of the crystal field strength 10Dq, estimate the electron-vibrational interaction constants, Jahn-Teller stabilization energy, Huang-Rhys factors, Stokes shift between the absorption and emission spectra. The obtained results can be used not only for explanation of the already existing experimental results, but for the prediction of optical properties of new materials. In this presentation several examples of such calculations will be given in detail [1-6] along with discussion of practical importance of the obtained results and their potential predictive power. References: [1] M.G. Brik, K. Ogasawara, Phys. Rev. B 74 (2006) 045105. [2] M.G. Brik, J. Phys. Chem. Solids 68 (2007) 1341. [3] M.G. Brik, N.M. Avram, J. Phys.: Condens. Matter 21 (2009) 155502. [4] M.G. Brik, N.M. Avram, C.-G. Ma, Comput. Mater. Sci. 50 (2011) 2482. [5] M.G. Brik, C.N. Avram, J. Lumin. 131 (2011) 2642. [6] M.G. Brik, Physica B 532 (2018) 178.

Keywords
first-principles calculations; crystal field splitting; transition metal ions; Stokes shift

Topic
DV-Xa Method

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

Corresponding Author
SITI NABIHAN ISHAK

Institutions
Department of Biosciences, Faculty Science, Universiti Teknologi Malaysia, 81310, UTM Skudai, Malaysia

Abstract
The aim of this work was to synthesis zeolite from kaolinite as a source of silica and alumina by exploring the effect of different crystallization temperatures at 100˚C, 120˚C, and 140˚C in a hydrothermal condition. This work focused on the phase transformation and morphological changes from kaolinite to zeolite using hydrothermal technique. The characterization of starting material, intermediate, and final product were performed by using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX). The characterization results showed the transformation of kaolinite to amorphous metakaolin after calcined at 900˚C and in the presence of sodium hydroxide as activating agent; the amorphous metakaolin was successfully reconstructed into synthesized crystal zeolite. Synthesized zeolite type A was produced at 100˚C while sodalite was synthesized at 120˚C and 140˚C. Following this, the synthesized zeolites were modified with silver ion by using ion exchange method. Disc diffusion technique (DDT) revealed that silver ion-exchanged zeolite showed significant antibacterial effect against Escherichia coli ATCC 11229 and Staphylococcus aureus ATCC 6538. It was found that, zeolite can be synthesized using economical raw material and modified with silver ion to enhance its antibacterial activity.

Keywords
Zeolite, Kaolinite, Silver, Escherichia coli and Staphylococcus aureus

Topic
Biochemistry

Link: https://ifory.id/abstract/eYamXMzT6VjK

Corresponding Author
Yeyen Hadjarati

Institutions
1Mahasiswa Program Studi Magister Pendidikan Fisika, Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 06, Gorontalo 96128, Indonesia
2Dosen Program Studi Magister Pendidikan Fisika, Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 06, Gorontalo 96128, Indonesia
*abdul.haris.odja[at]gmail.com

Abstract
The study was aimed to investigate the effectiveness of e-learning-based innovative learning set employing Edmodo to improve the senior high school students- creative thinking in momentum and impulse learning material. It applied an experimental method with one group pretest-posttest design. The study was conducted in Integrated Senior High School Wira Bhakti Gorontalo by having 20 students of the class of X IPA 2 as respondents. It was a research and development type using research stages by Jerold F. Kemp consisting of determining general instructional goal, analyzing students- characteristics, determining specific instructional goals, determining learning materials, determining the pretest, determining teaching and learning strategies, media, and sources, coordinating the supporting facilities, and evaluating (posttest). The developed learning set was syllabus, lesson plan, learning material, student-s worksheet, and test of creative thinking ability as well as an appropriate assessment instrument. Data analysis result revealed that there was an improvement of students- creative thinking ability proved by the average value of N-Gain for 0,70 in the high category. Based on the data analysis, it can be concluded that e-learning-based innovative learning set employing Edmodo was effective to improve the senior high school students- creative thinking in momentum and impulse learning material.

Keywords
Learning devices, E-Learning with edmodo, Critical Thinking

Topic
PHYSICS EDUCATION

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

Corresponding Author
Muchlisin ST, M.Sc.

Institutions
Department of Civil Engineering, Faculty of Engineering, UMY, Indonesia

Abstract
Population growth in Indonesia is currently experiencing a high increase. Those things will affect the increase of transportation needs, so that might increase the traffic volume. Traffic volume is needed in transportation planning. Nowadays, the manual method is usually used by field observers using a calculation tool called a counter to get traffic volumes. With the high of traffic volumes, manual traffic volume calculations are less effective. For this reason, in this study the researchers modified the program to create a vehicle detection program and classify vehicles according to MKJI 1997 on a Java-based off-street called U-COUNTER (Rural Area). The method that used in this research is Gaussian Mixture Model (GMM) method that base in image processing. In this program will attack of video input in the morning with 6 m height and 7 m, as well as video input in the afternoon with 6m and 7m height. The calculation results on the program will compared with manual calculations to get the accuracy and percent error values. The highest accuracy results obtained in this program are 76.48% with an error value of 23.52% for video 6 m in the morning. For the lowest accuracy results found on the 7 m video in the afternoon with an accuracy of 43% with an error value of 57%, this caused by congested traffic during video capture.

Keywords
Gaussian Mixture Model (GMM), Rural Street, Image Processing, Traffic Volume.

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

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

Corresponding Author
Amie Kusumawardhani

Institutions
(a) Department of Management, Faculty of Economics and Business, Universitas Diponegoro
amiekusumawardhani[at]gmail.com
(b) Master of Management Program Study, Faculty of Economics and Business, Universitas Diponegoro

Abstract
Creative industry relies heavily on expertise, talent and creativity. This study aims to examine competitive advantage and performance of the creative industry in Semarang, Indonesia, through market orientation, learning orientation, and intellectual capital. Data were collected from 114 firms in the creative industry in Semarang. The framework model proposed was tested using structural equation modeling (SEM). Findings of the study reveals that firm performance is positively influenced by market orientation and learning orientation, while the same effect for intellectual capital on firm performance is not found in this study. Interestingly, the study shows that intellectual capital might influence firm performance through competitive advantage. Managerial implications based on previous analysis are provided to owners and/or managers of the creative industry in order to enhance their firm performance.

Keywords
creative industry, market orientation, learning orientation, intellectual capital, competitive advantage, firm performance

Topic
Management

Link: https://ifory.id/abstract/MJkeBwNqT9YA

Corresponding Author
DEVI SUCI NIRWANA

Institutions
a) English Applied Linguistics Study Program
Postgraduate School
Universitas Negeri Medan, Indonesia
*devisucinirwana31[at]gmail.com
b) Universitas Negeri Medan, Indonesia
*rhnapitupulu[at]yahoo.com
c) Universitas Negeri Medan, Indonesia
*zainuddin52[at]yahoo.com

Abstract
Subtitling strategies used by subtitler in translating, word, phrase or speakers utterances in audiovisual field. This research deals with subtitling strategies used in The Meg movie texts. The purpose of this study is to describe the types of subtitling strategies used in The Meg movie texts. The research methodology used in the research is qualitative research design. The object of the study is The Meg movie directed by Jon Turteltaub. The data were analyzed by using interactive model of qualitative data management and analysis namely data collection, data condensation, data display and verification and conlusion. Based on the data analysis, the findings of this study revealed that there were ten types of subtitling strategies based on Haryanto theory used in The Meg movie texts namely Expansion (2.1%), Paraphrase (21.3%), Transfer (40.6%), Imitation (8.7%), Transcrition (1.0%), Condensation (6.8%), Decimation (0.7%), Deletion (7.3%), Taming (0.2%), Resignation (1.5%) and the researcher found four other types of subtitling strategies namely Abreviation (0.7%), Dislocation (0.7%), Culturally (1.5%) and Peyoration (0.2%). This means that the subtitling strategies that analyzed in the form of the clauses as the research data mostly focused on Transfer.

Keywords
movie; subtitles; subtitling strategies; translation

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/NMv3LuXzmfgG

Corresponding Author
Indah Christiani Silitonga

Institutions
English Applied Linguistics Study Program
Postgraduate School
State University of Medan, Indonesia

Abstract
The meaning of a verbal expression (novel) changes along with the change of mode (film). Systemic functional linguistic has held that meaning changes across mode. In this study, it will be analysed by lexical metaphor aimed to understand other meanings in lexically. The objective of this study is to investigate the kinds of lexical metaphor in novel and film Critical Eleven which shares the same story. This study will be classified into four concepts (Halliday, 1985; Saragih, 2011) namely; (a) noun-noun; (b) noun-verb; (c) noun-adjective; and (d) noun-verb/adjective and circumstance. In line with this idea, lexical metaphor shows lexical meaning in partly referred to understand another meaning. The data of this study will be collected by applying a documentary technique. The novel entitled Critical Eleven has 344 pages and the duration of the film is 135 minutes.

Keywords
Lexical Metaphor; Novel; Film; Systemic Functional Linguistic (SFL)

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/8Yf6FypHUbCJ

Corresponding Author
Edi Syahputra

Institutions
Universitas Negeri Medan

Abstract
This study aims to identify the enhancement of students mathematical disposition as an impact of realistic mathematics learning approach. This study is a quasi-experimental study. The study sample consisted of 152 students from 4 classes in two Junior High Schools in Medan. Instrument used in this study is mathematical disposition scale. Data were analyzed using Mann Withney, t test, correlation analysis, one way and two way ANOVA followed by post hoc test. The result showed that the enhancement of students mathematical disposition of high initial ability group is significantly higher than middle and low initial ability group. This shows that Realistic Mathematics Education provides the highest enhancement of students mathematical disposition in the high initial ability group compared to the middle and low ones. Overall, based on school category and students initial ability, realistic mathematics learning approach is significantly able to enhance students mathematical disposition.

Keywords
Realistic Mathematics Education, mathematical disposition, computer assisted

Topic
Education and Research Global Issue

Link: https://ifory.id/abstract/xfv92bKHQnwh

Corresponding Author
HARNIDA TANJUNG

Institutions
PASCASARJANA UNIMED

Abstract
Teaching learning process is an activity that aimed to transfer the lesson to the students that means the teachers as the senders of the message and the students mostly as the listeners. The teachers transform the knowledge in class by using words, phrases, clause and sentences. it will be interaction of the teachers and the students. When the teachers talk in front of the class, the modality as the sub topic of systemic functional linguistic must be used in the inteaction. Modality is used by the teachers to express the willingness, necessity and etc. But sometimes, teachers can not decide the suitable modality used in teaching learning process. In line with this idea, the objective of this study is to find out the types of modality applied in teaching learning process. This study will use the types of modality proposed by Halliday (2004) : Modalization and modulation. The source of the data of this study will be gathered by the teachers and students interactions and the data will be words and phrase that contains of modality. This study will apply descriptive qualitative.

Keywords
modality, SFL, teaching learning process, interaction

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/rtUH76XEx8fP

Corresponding Author
Maharani Dalimunthe

Institutions
PASCASARJANA UNIMED

Abstract
Gender can be find around us and everywhere. That is also part of our lives.Gender do not only have social and cultural differences but gender have many different of aspects. The research, there are different between male and female teachers utterances in teaching learning process based on inquiry model. It can be seen from indirect utterance of male teacher, while direct utterance of female teacher.The research analyzes and clarifies types of male and female teachers utterances in teaching learning process based on inquiry model. The objective of this research is to investigate types of utterances of male and female teachers in teaching learning process based on inquiry model.Data is based on the male and female teachers utterances. The teachers consist of six teachers. This study will use Tannens theory (1990).Both of genders have their own characteristic in communication. There are the features of report talk and rapport talk in communication. Report talk: a Direct Request, b Longer Talk in Public Context, c Speech Includes Slang or Swear words. Teasing and Banter, d Giving Advice to Solve Problem, e Mixing Business and Non-business Talk, f Rarely Give Praise or Compliments, g Showing Authority. And rapport talk: a Using qualifiers, b Apologizing, c Taking Blame, d Thanking, e Maintaining an Appearance of Equality, Downplaying Qualifications, f Establishing Relationship, g Downplaying Authority. This study will apply qualitative research design.

Keywords
gender, teaching learning process, inquiry model

Topic
Social,Language and Cultural Education

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

Corresponding Author
Zulkarnain Batu Bara

Institutions
a) English Applied Linguistics Study Program
Universitas Negeri Medan, Indonesia
*zulb203[at]gmail.com
b) Universitas Negeri Medan, Indonesia
rhnapitupulu[at]yahoo.com
c) Universitas Negeri Medan, Indonesia
*anniholilapulungan[at]gmail.com

Abstract
Teaching strategies especially Think pair Share and Directed Reading Thinking Activity (TPS) and (DRTA) model used to teach students motivation on reading comprehension achievement. The purpose of this study to find out the effect of Teaching Strategies on students reading comprehension achievement. This study is experimental research design using the experiment and control groups. This research was experimental design, the instruments were questionnaire sheet and reading test. The result showed that from mean score of experimental class 87.8, and mean score of control class 84.67. The data were analyzed by using SPSS program for windows version 20.Based on the data analysis of reading score showed that significant gained 0.003 less than 0.05. This means H0 refused and H1 accepted to there is the effect of TPS and DRTA teaching strategies on students reading comprehension achievement.

Keywords
Teaching strategies, Motivation, Reading Comprehension Achievement

Topic
Teachers Education Model in Future

Link: https://ifory.id/abstract/HcA86U7yKNXh

Corresponding Author
TRI WITA INDAH SARI

Institutions
PASCASARJANA UNIMED

Abstract
Debate is a method of interactive argument by speakers and listeners should be ensure the meaning from communication can be delivered properly. It means that they must have a goood intentionally to be shared information by one speakers with another. The phenomena when people do not follow the rules of cooperative principle is called flouting maxim. People will be missunderstanding in conversation while the utterences of people is difficult to be understood. By implying meaning from people can not be accepted by listeners and can be the problem in flouting maxim. In this research the objective of this study is to find out the types of flouting maxim by candidates governor of North Sumatera in election debate 2018. This study will use the types of flouting maxim proposed by Joan Cutting, Such as flouting maxim of quantity, flouting maxim of quality, flouting maxim of manner and flouting maxim of relevance. The source of the data of this study will be gathered by youtube channel and the data will be sentences and phrase that contains of flouting maxim. This study will apply descriptive qualitative.

Keywords
PRAGMATICS, FLOUTING MAXIM, POLITICAL DEBATE

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/MEDfFWmb2ZR8

Corresponding Author
Yuliana Ridwan

Institutions
English Applied Linguistic Study program
Postgraduate School
State university of Medan, Indonesia

Abstract
News is presented not only through printed media but also in the form of online media. Many kinds of news such as, economy, business, law, politic and etc. In presenting a news can use a language that is fairly rough and very fine language. In this study, news is presented in the form of online news. Euphemism plays an important role in presenting news in order to reveal things that are deemed inappropriate. The function of euphemism is to replace or cover up other words and expressions considered taboo and rude. The objective of this study is to investigate the types of euphemism used in political news in online mass media. This study will be classified into five types (Allan & Burridge 1991) namely ; (a) shortening; (b) circumlocution; (c) remodeling; (d) semantic change; (e) borrowing. In line with this idea, euphemism can be used to make speech or text more polite. The data of this study will be collected by applying a documentary technique.

Keywords
Euphemism, political news, Republika online mass media

Topic
Social,Language and Cultural Education

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