Indonesia Conference Directory

Corresponding Author
Rinie Indah Chandra Wirasati

Institutions
*) Hospital Administration Students, Faculty of Public Health, University of Indonesia, Depok / Psychiatrist, Army Hospital RS Tk. IV Singaraja, Bali. (rinieindah[at]gmail.com)
**) Doctor / Lecturer, Faculty of Public Health, University of Indonesia, Depok.

Abstract
Objective: An organization is formed to achieve a common goal, but to achieve goals effectively requires good and right management. Management is a process to make activities organized efficiently and effectively with and through others. The purpose of the study to determine the most dominant factor associated with the employees performance in Army Hospital RS Tk. IV Singaraja, Bali. Methods: This research is descriptive analysis. Data collection method used in the study was a questionnaire method. Factors that associated with the employees performance in Army Hospital RS Tk. IV Singaraja, Bali that analysis are personal factor, leadership factors, team factors, systems factors, and contextual factors. Conclusion: Leadership factors is the factor that greatly associated with employees performance in Army Hospital RS Tk IV Singaraja, Bali.

Keywords
Employees Performance, Personal Factor, Leadership Factors, Team Factors, System Factors, Contextual Factors.

Topic
Human Resources Management

Link: https://ifory.id/abstract/4RaLrejGb92g

Corresponding Author
Intan Masruroh S

Institutions
Universitas gadjah mada

Abstract
Ferroelectric material has been used for advanced semiconductor technology. A necessity of a better processing instruments increased every year. Spintronics material as perovskite (PbTiO_3 and BaTiO_3) become new approach in processing instruments because of their ferroelectricity. This paper describes a new study of structure and electronic system perovskite. The ferroelectricity and spin splitting material influence energy and structure in momentum space. The spin splitting in this material proved by Rashba parameter.

Keywords
Spintronics, ferroelectric, spin splitting

Topic
Theoretical and Analysis in Materials

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

Corresponding Author
Altje Latununuwe

Institutions
Department of Physics Education and Laboratory of Physics Education,
Pattimura University

Abstract
Titanium dioxide (TiO2) nanoparticles (NPs) have been successfully synthesized using the green synthesis method, which used peperumia pellucida leaf extract as reducing agent and TiCl3 as precursor. The prepared TiO2 NPs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and ultra violet visible (UV-Vis) spectroscopy. XRD result shows that the NPs are in nature anatase phase at the angles of 2 theta 25.3o, 37.54o, 49.91o, 53.84o and 62.72o corresponding to crystal orientations (101), (004), (200), (105) and (204). Based on SEM image, the sizes of these materials are in the range 20-40 nm. The maximum optical absorbance and calculated band gap energy are around 202 nm and 3.68 eV, respectively.

Keywords
TiO2 nanoparticles, green synthesis, peperumia pellucida, SEM, XRD, UV-vis

Topic
Nano Science and Technology

Link: https://ifory.id/abstract/rLe4zVm8DMyb

Corresponding Author
Ibnu Syuhada

Institutions
a) Department of Physics, Institut Teknologi Bandung, Physics of Electronic Materials Research Division, PECVD Lab. Ganesha 10, Bandung 40132, Indonesia

* toto[at]fi.itb.ac.id

Abstract
In this recent work, we develop new empirical interatomic potential for the construction of carbon materials. We started by expressing an explicit form of incorporate energy and the local environment to redefine bond order, allowing increased accuracy of computation to be realistic. As a result, we show comparisons of calculations with experiments and other methods for cohesive energy, bond length, mechanical properties, including phonon. The work limitations are also discussed for future use.

Keywords
bond order, empirical interatomic potental, local environment

Topic
Theoretical and Analysis in Materials

Link: https://ifory.id/abstract/vK6YPrMXRpQD

Corresponding Author
Robi Kurniawan

Institutions
1 Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang 65145, East Java, Indonesia
2 Centre of Advanced Materials for Renewable Energy, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145 East Java, Indonesia
3 Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore 117603, Singapore

a)Corresponding author: robi.kurniawan.fmipa[at]um.ac.id

Abstract
The problem of ozone depletion lies behind the importance of developing a photodetector device, which is used as a preliminary detection step against the risk of solar radiation. At present, hybrid photodetectors are a major concern because they have detection and operational advantages over conventional photodetectors. In this study, we investigated the optical properties and photoresponse of hybrid ZnO/graphene (HZG) systems, of which ZnO nanorod (ZnO NR) was used in the system. Investigations were carried out using spectroscopic ellipsometry (SE) and solar simulators. The results of SE fittings with the effective medium approximation (EMA) method confirmed that the length of ZnO NR was 27.81 nm, 42.67 nm, and 220.46 nm respectively. We note that increasing the size of ZnO NR promotes light absorption to increase significantly. Furthermore, the relationship between light absorption and HZG photoresponse was discussed using comprehensive analysis.

Keywords
Hybrid ZnO/graphene; photodetector; optical absorption; photoresponse

Topic
Synthesis and Characterization Techniques

Link: https://ifory.id/abstract/DZvpyzNT36xX

Corresponding Author
Aphisak Kaeopisan

Institutions
(1,2) Program of Physics, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, Sakon Nakhon, 47000, Thailand.

Abstract
For harvesting energy, mechanical energy converts to electrical energy using piezoelectric devices. In this study, piezoelectric flexible (PF) was synthesized form composite materials of polyvinylidene difluoride adding 1wt.% of carbon nanotube (PVDF-1wt.%CNT). The PVDF-1wt.%CNT size 0.5×30×100 mm3 and annealed at 60 ℃ for 1h. A copper tape was compressed for electrode on the top and bottom of the PF, poling at 6 kV mm–1 for 20 min. The results show that the piezoelectric coefficient (d33) maximum was 22 pC N–1. The 5 PF modules was fabricated to a device and attachment on a motorcycle coil spring compressor to investigate the generating electricity of the PF from mechanical energy. The motorcycle was tested using velocity at 50 km h–1 for 5 min run-on various surface road. The electricity from the PF modules were arranged using rectifier circuit installed motorcycle coil spring compressor, the output voltage was 3, 3.3, and 4 V for asphalt, cement, and gravel road, respectively. It expected that the harvesting energy devices using piezoelectric flexible is useful to apply on a motorcycle for generated electricity.

Keywords
PVDF; CNT; Composites; Harvesting energy; Mechanical energy

Topic
Energy and environment materials

Link: https://ifory.id/abstract/P7ZRdMewxKTk

Corresponding Author
Riser Fahdiran

Institutions
(a) Department of Physics, State University of Jakarta, Jalan Rawamangun Muka, Jakarta Timur, 13220, Indonesia
(b) Department of Chemistry, State University of Jakarta, Jalan Rawamangun Muka, Jakarta Timur, 13220, Indonesia

Abstract
We study the evolution of cluster formation on ultrafast laser induced ablation of Gold nanoparticle by means of Molecular Dynamics simulation. The energy given to the system are in two regime, the lower energy is able to ablate and the higher energy evaporate the nanoparticle into finer cluster. The case for lower energy, the system formed a shell structure with smaller clusters reside within, while for higher energy the system are evaporated and dominated with monomers and small clusters around. The evaporated case shows a compressive pressure all over the simulation time while for lower energy case, tensile pressure are responsible for the fraction of the nanoparticle. Small angle scattering analysis performed at the end of simulation indicated the distribution of cluster sizes are linearly correspond to the cluster size analysis obtained by following trajectories of each atom from Molecular Dynamics scheme.

Keywords
cluster; nanoparticle; small angle scattering; Gold

Topic
Computational and characterization of materials

Link: https://ifory.id/abstract/7wm6zMx2Rhe9

Corresponding Author
wattana photankham

Institutions
Piezoelectric Research Laboratory, Center of Excellence on Alternative Energy, Research and development institution, Sakon Nakhon Rajabhat University, Thailand

Abstract
The (1-x)Ba(Zr0.2Ti0.8)O3-xKNbO3 samples were synthesized by solid state reaction method. The samples were investigating on the crystalline structure, dielectric and ferroelectric properties. XRD pattern were exhibited the microstructure and tetragonal phase for all samples with sintering temperature at 1200 ºC. The results that should 0.2KNbO3 was obtained coexists between tetragonal to cubic phases. The dielectric constant obviously was increased from adding 0.3KNbO3, while the dielectric loss slightly decreases. The P-E loops of sample ceramic showed the ferroelectric behavior, as well as normally ferroelectric and relaxor ferroelectric. In addition, the good ferroelectric properties exhibited Ec = 7.24 kV/cm, Pr = 13.38 µC/cm2 for 0.5KNbO3, which it originated to the contributions of the perovskite structure (tetragonal phase).

Keywords
Microstructure, Dielectric properties, Polarizability, Solid state reaction, Hysteresis loop

Topic
Metal alloys, ceramics and composite materials

Link: https://ifory.id/abstract/WpBYj3JNv2fQ

Corresponding Author
Arie Listyarini

Institutions
(a) Department of Physics, Universitas Indonesia
*cuk.imawan[at]sci.ui.ac.id

Abstract
Studies on mechanical and barrier properties of Cassava starch/PVA composites reinforced with pineapple leaf nanocellulose have been done to obtain an alternative new biodegradable food packaging. The aim of this research is to investigate changes of mechanical and barrier properties of cassava starch/PVA/Nanocellulose compared with cassava starch/PVA composite. Composition of Starch/PVA was 50:50 with nanocellulose concentration vary from 1, 3, 6 and 10% in bionanocomposites. Tensile strength, elongation, and water vapor transmission rate were used to evaluate the mechanical and barrier of bionanocomposite films. The microstructure was evaluated using FT-IR, SEM, and XRD. Results showed that increasing the concentration of nanocellulose decreasing the tensile strength and elongation of bionanocomposites. Nanocellulose decreased the transparency of the composite films. Addition of 1% nanocellulose increased the WVTR and then the WVTR of bionanocomposite films containing 3 – 10% nanocellulose decreased up to 10 – 20%.

Keywords
nanocellulose, bionanocomposites, mechanical properties, water barrier properties

Topic
Biomaterials and applications

Link: https://ifory.id/abstract/wKHeVkj2htYD

Corresponding Author
Orapan Hemadhulin

Institutions
a Faculty of Science and Technology, Sakon Nakhon Rajabhat University,
Sakon Nakhon 47000, Thailand
b Piezoelectric Research Laboratory, Center of Excellence on Alternative Energy, Research and Development Institution, Sakon Nakhon Rajabhat University, Sakon Nakhon 47000, Thailand

Abstract
Abstract The [0.98Pb(Zr0.52, Ti0.48)O30.02Sr(K0.25, Nb0.75)O3] ceramics (PZTSKN) were synthesized by powders of PbO2, ZrO2 , TiO2, K2CO3, SrCO3 and Nb2O5 by solid state reaction method. Then the invention of the tape by tape casting method. Then examine the crystalline structure of PZT-SKN tape ceramic by X-ray diffraction, measuring density and Vickers Hardness, examine the dielectric and ferroelectric property of PZT-SKN tape ceramic. The PZT-SKN tape ceramic have crystal structure of Perovskite type tetragonal and hexagonal lattice parameter a=b=4.036 Å, c=4.138 Å and c/a=1.025. The density = 6.035 g cm–3and Vickers Hardness = 107 N mm–2. The dielectric constant of PZTSKN tape ceramic the r = 1499 at 532 OC. The dielectric and ferroelectric property of PZT-SKN tape ceramic show behavior better Compared to PZT-SKN tablet ceramic.

Keywords
Dielectric; Ferroelectric; PZT-SKN; Piezoelectric tape

Topic
Metal alloys, ceramics and composite materials

Link: https://ifory.id/abstract/f6UNywXmCb2J

Corresponding Author
Windri Handayani

Institutions
1 Departemen Biologi, Universitas Indonesia, Depok 16424
2 Departemen Fisika, Universitas Indonesia, Depok 164241

Abstract
Matoa leaves, beside of their medicinal properties it can so be used for biosynthesis of silver nanoparticles. The factors that play role in the biosynthesis process is pH. Therefore, this study carried out the biosynthesis of silver nanoparticles using leaves extract of Matoa and the effect of pH on the shape, size and stability of the silver nanoparticles. Biosynthesis was carried out by mixing 2% Matoa extract and 1 mM AgNO3 solution which then incubated for 24 hours. There are four variations of pH used, 4, 7, 9 and 11. Silver nanoparticles were characterize based on color changes, UV-Vis spectrophotometers, TEM (Transmission Electron Microscopy), and PSA (Particle Size Analyzer). The photos and UV-Vis spectra of pH treatment showed a change in the color of the solution to yellow-brown and had absorption at a wavelength of 400-500 nm indicating the formation of silver nanoparticles. The TEM results showed that the boiled water of the Matoa leaves tend to have spherical silver nanoparticles. The higher the pH of the reaction environment, smaller silver nanoparticles formed, and the stability of the silver nanoparticles produced tends to be unstable except for AgNP in pH 9 which is moderately stable and has a good monodispersity.

Keywords
Pometia pinnata, Silver nanoparticles, Biosynthesis, pH

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/gWet7yhP6wmb

Corresponding Author
M. ARI FAHRIL

Institutions
a) Department of physic, Faculty of math and science, University of Sumatera Utara, Jl. Dr. Mansur 9 Medan 20155, Indonesia
*arifahril17[at]gmail.com
b) Physic Department, University of Sumatera Utara, Jl. Dr. Mansur 9 Medan, Indonesia

Abstract
Abstract - In general, high-voltage plants are carried out with large and complicated circuits. As research develops, a more simple and efficient series is needed. The Flyback transformer (FBT) method is one method that is often used in generating high voltage with a low DC voltage source. The advantage of this method is to have a simple, efficient and easy to carry series. This circuit consists of a flyback transformer as its main component. This circuit also consists of an ATMega 328 microcontroller, IGBT, and several other supporting components. The initial voltage comes from the PSA which has produced a DC voltage, then it will be forwarded to the IGBT driver which has been given a frequency from the ATMega 328 microcontroller. IGBT functions as a high frequency switching. After that, IGBT which already has a high frequency will be forwarded to the flyback transformer to produce a high voltage, according to the duty cycle regulated by the potentiometer. Frequency and Duty Cycle will be displayed on the LCD. The application of this tool can be carried out on milk pasteurization systems, dielectrics for food ingredients, food sterilization, and air purifiers.

Keywords
FBT IGBT Duty cycle PWM Frequency ATMega 328

Topic
Physics related sciences

Link: https://ifory.id/abstract/yLc3mGkhKENX

Corresponding Author
Iwan Sugihartono

Institutions
1Program Studi Fisika, FMIPA Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun, Jakarta Timur, Indonesia 13220
2Program Studi Kimia, FMIPA Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun, Jakarta Timur, Indonesia 13220

Abstract
We have grown no-doped and Al-doped ZnO thin films with different Al element composition by ultrasonic spray pyrolysis (USP). The deposition by USP was performed with the temperature of 450 oC, ultrasonic frequency of 1.7 MHz, and under atmosphere ambient for 15 minutes on top of Si substrate. No-doped and Al-doped ZnO thin films were confirmed structurally by x-ray diffraction (XRD). Optical measurement also performed in order to observe absorbance, transmittance, and reflectance properties. Photoluminescence properties show two typical ZnO emissions i.e. ultraviolet and visible. Then, the relevance of structural properties and optical properties will be used to analyze the effect of Al element as dopant on characteristic of electrochemical impedance of ZnO thin films.

Keywords
Al doped ZnO, XRD, Optical measurement, Phototoluminescence, Electrochemical impedance

Topic
Optical, luminescence, Electronic Materials and applications

Link: https://ifory.id/abstract/xKMXFJ8VPCaN

Corresponding Author
Pradita Ajeng Wiguna

Institutions
(a) Department of Physics, Faculty of Mathematics and Science, Universitas Indonesia, Indonesia
pradita.ajeng[at]ui.ac.id
*cuk.imawan[at]sci.ui.ac.id

Abstract
Silver nanoparticles are widely studied because of their superior properties so they are widely used in various applications. Structural modification with the right synthesis method is key to obtaining superior properties of silver nanoparticles. In this experiment, gamma irradiation methods have been used to synthesize silver nanoparticles. This method has been carried out using a solution of AgNO3 metal salt with different molarities, namely 1, 10, 100 and 1000mM then for each molarity were placed in a solution of polyvinyl alcohol (PVA). The irradiation process was carried out in the cobalt-60 gamma source chamber at doses from 0 to 20kGy with a dose rate of 4.84kGy/h. This process results in a deep yellow Ag/PVA colloid nanoparticles. Increasing the molarity of the AgNO3 causes a decrease in the gamma dose applied. The properties and structure of Ag/PVA nanoparticles were characterized using UV-Vis spectrophotometer, Particle Size Analyzer and Transmission Electron Microscopy. The optical absorption spectra of Ag/PVA nanoparticles were measured using UV-Vis spectrophotometer and showed that the absorption peak was observed at wavelengths of 421-409nm. The absorption intensity increases with increasing gamma dose and reaches the maximum value at a dose of 10kGy. The resulting Ag/PVA nanoparticles have a size below 50nm. The results of the PSA and TEM analysis showed that Ag/PVA nanoparticles show increased stability because of the role of PVA in the synthesis process.

Keywords
Gamma irradiation; polyvinyl alcohol; silver nanoparticles

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/jhpFt9nW7Lfr

Corresponding Author
Setyawan Purnomo Sakti

Institutions
Department of Physics
Brawijaya University
Jl Veteran, Malang 65145, Indonesia
sakti[at]ub.ac.id

Abstract
High shear modulus coating material does not provide loading effect to the Quartz Crystal Microbalance sensor. The condition is met when the coating material was glassy and the layer was homogeneous. Polystyrene is considered as a glassy coating material when used on 10MHz Quartz Crystal Microbalance. Homogeneous and compact polystyrene coatings that are glassy can be obtained using the spin coating method. The films rigid condition is shown by the sensor impedance value at the series resonance frequency after coating. However, using ultrasonic spray coatings, it was known that polystyrene films are formed not as homogeneous as when coated using spin coatings. We observed that Quartz Crystal Microbalance was damped by the polystyrene film when the coating film was not evenly distributed over the sensor surface, especially on the sensor surface above the electrode. The minimum impedance of the QCM sensor increased significantly. The unevenness of the coating causes the damping effect on the QCM sensor. The minimum sensor impedance before coating was less than 15(Omega). When the polystyrene layer was uneven, we found that the impedance increased by more than 25 (Omega). The results showed that the distribution of polymer layers on the sensor surface is one of the important factors that must be considered to avoid the effect of damping on the sensor. The measurement results showed that the sensor has a negative mass effect.

Keywords
QCM sensor; uneven coating; polystyrene

Topic
Sensing materials and applications

Link: https://ifory.id/abstract/kXCLyq9jdzAP

Corresponding Author
Indah Nursyamsi Handayani

Institutions
a) Department of Electromedical Engineering, Poltekkes Kemenkes Jakarta II, Jakarta 12120, Indonesia
indah.nursyamsi[at]poltekkesjkt2.ac.id
b) Department of Physics, Faculty of Mathematics and Science, Universitas Indonesia, Depok 16424, Indonesia
*cuk.imawan[at]sci.ui.ac.id

Abstract
Detection of absorbed dose in materials were irradiated is one method for monitoring irradiation processes. Dyes that are sensitive to ionizing radiation has the potential to used as radiation detectors. This article will report on the fabrication of gamma-rays detector using natural red dyes obtained from Hibiscus sabdariffa L. (HS) calyxes extract. The HS extract solution was made using a simple extraction method which was carried out by soaking the dried HS calyxes with double distilled water as a solvent for 24 hours. Gammacell irradiator with Cobalt-60 radiation source was used to test the sensitivity of HS extract solution to gamma radiation with a dose of 1-10 kGy. UV-Vis spectrophotometer was used to the characterization of optical properties of HS extract solution. After gamma irradiation, it was observed the color of the HS extract solution faded slightly from dark red to more transparent red color along with increasing doses. The results of UV-Vis characterization showed maximum absorbance of HS extract solution at 523 nm and a decrease in absorbance of 95% after irradiation at a dose of 10 kGy. The HS extract solution is stable in the dark storage conditions at the refrigerator up to 30 days of storage.

Keywords
Gamma-rays detector, Hibiscus sabdariffa L. extract, irradiation

Topic
Sensing materials and applications

Link: https://ifory.id/abstract/bW3JGXUQFLmd

Corresponding Author
Andi Cudai Nur

Institutions
Universitas Negeri Makassar 1,2,3
Makassar Indonesia
cudainur[at]gmail.com
haedar652002[at]yahoo.com.au

Abstract
According to the Travel and Tourism Competitiveness Report 2015 by the World Economic Forum (WEF), in ASEAN, Indonesia is ranked fourth after Singapore, Malaysia, and Thailand. The tourism sector can be a Core Economy Indonesia, as one of the key factors in increasing revenue service exports, job creation, and the development of the tourism industry. Government efforts in the development of tourism potential in Indonesia, namely how stretched local governments to follow-up programs and activities in the area of tourism development, respectively.This method focuses on collecting and analyzing data and combining quantitative data and qualitative data both in a single study and a series of studies. The central premise on which this method is based is to use a combination of quantitative and qualitative approaches to find better research results than if only using one approach (Ujang Murana, downloaded 23 July 2016, 22:21). Whatever the level of the tourism destination of life cycle needs to be supported by technology and digitalization literacy on aspects: 1) Features cultural, historical conditions, cultural and social conditions affect the process and outcome. 2) The framework administrative, legal and political, with various administrative provisions, rules and regulations, and political conditions of tourism development. 3) The degree of integration is the level of integration of various parties, including the implementation of the tourism business models.

Keywords
Strategy, Digitizing, Area Development, Tourism and Infrastructure

Topic
Hospitality and Tourism

Link: https://ifory.id/abstract/AB74HVcku3fQ

Corresponding Author
S. Sulastri

Institutions
Universitas Pendidikan Indonesia

Abstract
The purpose of this research is to obtain empirical evidence about the effect of capital structure on bond performance which is moderated by institutional ownership. The sample from this research uses purposive sampling which consists of companies in the infrastructure, utilities & transportation sectors that are listed on the Indonesia Stock Exchange (IDX). This study uses MRA (Moderated Regression Analysis). Based on the results of the research concluded that the capital structure using leverage ratio as measured by the debt equity to ratio (DER) affects the performance of bonds. Meanwhile, institutional ownership strengthens the relationship of the effect of capital structure on the performance of bonds

Keywords
Capital Structure, Bond PErformance, Institutional Ownership

Topic
Financial Management and Accounting

Link: https://ifory.id/abstract/uZ8fnBQaevWH

Corresponding Author
Maya Sari

Institutions
Universitas Pendidikan Indonesia

Abstract
This study aims to analyze Trade-Off Theory and Pecking Order Theory as the basis of the capital structure policy of manufacturing companies in Indonesia as one of the countries with the dominance of banks as a source of corporate sector funding. The research method used is descriptive verification method. Verification testing is done to examine the influence of capital structure determinants which consist of liquidity, profitability, institutional ownership, tangibility, company growth, and efficiency. This study will also examine the moderating effect of firm size on the relationship of capital structure and its determinant factors. The research sample is a company in the manufacturing industry sector which is listed on the Indonesia Stock Exchange, during the period 2005-2017. Sampling uses purposive sampling technique, while the analysis technique uses panel data regression.

Keywords
Banking oriented country, Capital Structure, Manufacturing Firm, Pecking Order Theory, Trade Off Theory

Topic
Financial Management and Accounting

Link: https://ifory.id/abstract/ML7VPzkQJHwj

Corresponding Author
Lisnawati Lisnawati

Institutions
Universitas Pendidikan Indonesia

Abstract
Bandung City Happiness Index Data Indicates that citizens under the age of 24 have the lowest happiness index, age under 24 years is the age of college children. Therefore, to increase the happiness index, the city of Bandung government needs to coordinate with the universities in the city of Bandung. State Universities as educational service providers play a role as providing quality educational services and supporting the lives of students who spend most of their time on campus. Public universities are seen as having a place to provide not only the quality of education but also the stimulation of creativity, and "happiness" for students. Various efforts continue to be made by higher education management in an effort to increase student satisfaction. The research method is descriptive, verificative, through explanatory surveys, the study population is students of the Indonesian Education University and PTN in the city of Bandung, with a minimum sample of 400 respondents. The analysis technique of the data used is Partial Least Square by using SmartPLS Software. Research Results are expected to provide strategic input for managers of state universities in the city of Bandung in order to create development policies and administrators of campus management who can consider increasing the happiness of their students.

Keywords
University Service Satisfaction, Student Happiness, Student Satisfaction, Student Experience

Topic
Marketing Management

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

Corresponding Author
Hendra Susanto

Institutions
1Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Indonesia
2Department of Internal Medicine, National Taiwan University Hospital-Hsinchu Branch, Hsinchu, Taiwan-ROC
3Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan-ROC
4Department of Endocrinology, Saiful Anwar General Hospital, Malang, Indonesia
5Department of Clinical Pathology, Saiful Anwar General Hospital, Malang, Indonesia
6Division of Surgical Oncology, Department of Surgery, Saiful Anwar General Hospital, Malang
7Department of Surgery, Sardjito General Hospital, Faculty of Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia
8Department of Nursing Science, Universitas Tribhuwana Tunggadewi Malang, Indonesia



a)Corresponding author: hendra.susanto.fmipa[at]um.ac.id
b)nanshan.liou[at]msa.hinet.net

Abstract
The epidemiologic evidence has been proved that chronic hepatitis C (CHC) infection may significantly contribute to the progression of hepatocellular carcinoma (HCV). Moreover, the prevalence of individual with CHC infection in Indonesia increased dramatically during the last decade. Importantly, there is no preliminary data, whether specific liver derived-hormone, betatrophin/ANGPTL-8/ can contribute to the early stage of HCC caused by HCV infection. The goal of this study was to provide a baseline data of betatrophin profile in subjects with CHC. Nineteen healthy control and fourteen CHC patients were considered as the samples and circulating betatrophin was measured by ELISA. Interestingly, the higher level of betatrophin was observed in an individual with CHC compared to placebo. Furthermore, the linear data was also found that the classical marker of liver injury, ALT significantly increased in the same patients. Based on this critical data, it is suggested that betatrophin may contribute to the early stages of HCC in connection to the gradual changes of HCV DNA and ALT level. Even though this finding could be a hallmark for the essential characteristic of betatrophin in CHC subjects progress to HCC, however, the future study with long-term monitoring in clinical observation of CHC patients is compulsory.

Keywords
betatrophin, chronic hepatitis C, metabolic syndrome, hepatocellualr carcinoma

Topic
Biomedical Science

Link: https://ifory.id/abstract/KMfeAQVhL6BW

Corresponding Author
Ade efrina Nasution

Institutions
Program Pascasarjana Linguistik Terapan Bahasa Inggris, UNIMED

Abstract
Nowadays, the developing and appreciating material based on students local based needs is very attractive. The purposes of this study are: 1) To find out the existing English reading materials used for the students of sixth grade at SDN 100107 Lobulayan in South Tapanuli regency; 2) To find out English reading material are needed by the students of sixth grade at SDN 100107 Lobulayan in South Tapanuli regency. This study is employed by implementing Research and Development design by Borg and Gall, 1983 but in implementing the model is simplified and adapted to Dirgeyasa (2011) become four steps: 1) evaluation and need analysis, 2) developing new material, 3) validating material, 4) final revision. The target of clients of this research was 29 correspondents which consisted of 25 students of SDN 100107 Lobulayan, 1 English teacher they are taken by using total sampling technique, 2 lecturers and 1 stakeholder is taken by using random sampling technique. The data was collected by questionnaire, documentation, and interview. The result of the study showed that the existing reading material used was not relevant with the needs of students of SDN 100107 Lobulayan in terms of topics, basic competences, assessment, and learning activities. After gaining the data from the evaluation and need analysis, it was found that the relevant reading material needed by the students of SDN 100107 Lobulayan are the material which related to their local based needs of area tourism and contains various tourism reading text; Aek Sijornih baths, Silima-Lima waterfall, and Parsariran Baths.

Keywords
R & D; reading material; local based needs

Topic
Curriculum, Research and Development

Link: https://ifory.id/abstract/p9wqcjV4fHFn

Corresponding Author
Fitri Rahma Handayani Situmorang

Institutions
English Applied Linguistics of State University of Medan, Indonesia

Abstract
Conversational implicature is the inference by assuming that speaker and addressee knows and accepts the communicational norms (maxims). The study attempts to explore the students awareness of conversational implicature and the reasons. The subjects of the study are the students of different Academic Year, English Department of Faculty of Language and Arts, State University of Medan. The study will be conducted by applying qualitative descriptive design. The technique of elicitation will be applied to find out the students awareness of conversational implicature and a retrospective interview will be used to know the reason of students awareness of conversational implicature. Results of the study show that most students were aware enough of conversational implicature which proposed by Grices cooperative principlein conversational implicature. It can be inferred that the students tried to answer the questions with relevant answer with the reasons. Thus, students at university level Students at the university level, especially English Department are expected to be aware and understand the conversational implicature. Students awareness of conversational implicature is expected to be useful as of the process of gaining content knowledge, intention, not only in academic subjects, but also in daily life.

Keywords
conversational implicature, awareness, retrospective interview

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/UMzKb4VmjPu6

Corresponding Author
Naimatussyifa Daulay

Institutions
a*) Biology Education Department
Postgraduate Program of Universitas Negeri Medan
Deli Serdang, Indonesia
syifalovato[at]gmail.com

b) Biology Education Department
Postgraduate Program of Universitas Negeri Medan
Medan, Indonesia
tumiurgultom[at]unimed.ac.id

c) Biology Education Department
Postgraduate Program of Universitas Negeri Medan
Medan, Indonesia

Abstract
The aim of the study was to produce a product in the form of a textbook based on research about Mendel genetics on Drosophila melanogaster. The development model used in this study is the 4D model. The results of product validation by material experts amounted to 95,4%, the language expert was 84,37%, the learning design expert was 94,4%, expert layout was 85%. It can be concluded that the product can be used as an additional textbook in learning activities in the Genetic course and there is no revision.

Keywords
Textbook; 4D Development Model; Mendel Genetic; Drosophila melanogaster

Topic
Curriculum, Research and Development

Link: https://ifory.id/abstract/TUNJdpnbZ8jk

Corresponding Author
ENDAH ANDAYANI

Institutions
Master of Social Science Education Study Program,
Universitas Kanjuruhan Malang, Malang, Indonesia

Abstract
A persons confidence to succeed in running a business that will be carried out is called Entrepreneurial self-efficacy. Entrepreneurial self-efficacy is not an innate ability, but can be generated by motivating students to become entrepreneurs. The effort to grow self-efficacy for entrepreneurship was carried out to 35 Kanjuruhan University Malang students. The activity is entrepreneurship training, visits / observations in MSMEs, internship activities in MSMEs, and training in preparing a business plan. The purpose of this study was to determine the factors that influence ESE. Data is collected through observation, questionnaires, and tests. Data were analysed using multiple regression using the SPSS 20 program. The results showed that entrepreneurship training and internships in MSMEs had a positive effect on ESE, while the visits to MSMEs and training in business plan preparation had no effect on ESE.

Keywords
Entrepreneurial Self-efficacy, entrepreneurship training, industry visits, industry internships, business plan.

Topic
Business Education

Link: https://ifory.id/abstract/dZFPDp62xThq

Corresponding Author
ANNISA PUSPASARI

Institutions
PROGRAM PASCASARJANA UNIVERSITAS NEGERI MEDAN, NORTH SUMATERA, INDONESIA

Abstract
This study explores modality employed in the presidential debate of Indonesia 2019. Modality is either expressed as the speakers judgement of the probabilities or the obligation involved what is saying.In political setting, language has fundamental role in conveyance of political factors stage managed and pre planed goals the audience in order to provoke, revail, and persuade the audience toward the intended goals and meaning, Woods 2006 The aim of presidential debate to express their vission and mission and also persuade the audience to vote them.The presidential election candidates will have argument battle among Mr Jokowi and Mr Prabowo subianto to express their opinion, idea and and thought in topic being discussed. There are three problems in this study, namely types of modality in Indonesian Presidential debate, the dominant modality and the explanation on the modality context. The speech transcription were analyzed by applying the theory of Systematic Functional Linguistic.The occurance of modality were qualitatively analyzad by changing them into percentage to determine the portion namely modalization and modulation.This can be a way election to show the some vision as the president of Indonesia.

Keywords
modality presidential debates speech

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/GmfvYukXaKe9

Corresponding Author
Indarini Dwi Pursitasari

Institutions
a) Education Management, Program of Postgraduate Universitas Pakuan, Bogor, Indonesia
b) Student of Education Administration, Program of Postgraduate Universitas Pakuan, Bogor, Indonesia

*email: ekasuhardi[at]unpak.ac.id

Abstract
This study aims to enhance teacher productivity through examining the relationship between the professional commitment and principal supervision with teacher productivity. The participants pf this research were 134 teachers enrolled in several private junior high schools in Bogor, using questionnaire of professional commitment, supervising principals, and teacher productivity. The data were analyzed using correlational statistics and Sitorem to derive recommendations and find the order of priority improvements needed. The results of the study show that there is a positive relationship of the professionals commitment with teacher productivity, the principal supervision with the teacher productivity, and the professionals commitment and principal supervision together with teacher productivity. This shows that teacher productivity can be enhanced through strengthening professionals commitment and principal supervision and from the teacher productivity component itself. The results of Sitorems analysis show there are 15 components that still need to be repaired to sequence of improvements

Keywords
Professionals pommitment, principal supervisions, teacher productivity

Topic
Adult Education

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

Corresponding Author
Rizky Puspa Sari

Institutions
a) Physical Education, Post Graduate Program, Universitas Negeri Medan

Abstract
The purpose of this study was to determine the increase in rhythmic gymnastics learning outcomes through audio-visual media. The method used is CAR (Classroom Action Research). CAR has two cycles, namely in the first cycle making action plans, carrying out actions, observations and reflections. The results of reflection are used as a basis for the planning phase of the second cycle if the first cycle is not successful. So in the second cycle gives more learning through Audio Visual Media and gives more direction to students where errors are often more guided while in class before going back to practice in the field. The research instrument uses a portfolio and observation sheets. Data analysis techniques use percentages. The conclusion that through audio-visual media can improve rhythmic gymnastics learning outcomes.

Keywords
Learning Outcomes, Rhythmic Gymnastics, Audio Visual

Topic
Education and Research Global Issue

Link: https://ifory.id/abstract/TKjZzbeVD43Q

Corresponding Author
Eri Sarimanah

Institutions
1,2 Indonesian Language Education, Pakuan University
3 Indonesian Language Education, Kuningan University

Abstract
Qualified learning will be achieved if the teacher is able to design the learning process well. The indicator of good learning design is if it is able to acomodate the students- different learning style, to give the opportunity for the students to be active, creative, innovative and to dig up students- potency. Thus, it is important to change the teachers- mindset in designing the learning process. Through lesson study based metacognitive strategy, learning is organized through plan, do, see steps. In the plan step, the teacher makes chapter design and lesson design that applies metacognitive strategy. In the do step the students identify basic competence that should be achieved and the steps of the learning process or students activity that should be written in the learning design (self-planning). Then the students recheck the relevance between the basic competence and and the learning steps that should be available (self monitoring). The last step in do is evaluating the process and result of learning organization that the make (self evaluation). The last step is see or reflection where the lecturer together with the observers evaluate the learning process and learning result to revise the future learning. The observation result shows that designing the lesson study based learning activity through metacognitive strategy has changed their view point in making the students learn. They are careful in analyzing the need, relating the relevance between basic competence and the learning steps that should be available. They also get used to recheck the design they have made. From this point they get used to be careful, sistematic, selective, comprehensive, logic, and try to dig up their potency in designing learning activity. Through this effort, it is expected that qualified learning can be achieved.

Keywords
metacognitive strategy, learning design, lesson study

Topic
Learning / Teaching Methodologies and Assessment

Link: https://ifory.id/abstract/j98R4t2gm7zF

Corresponding Author
Hasnul Haris

Institutions
a)Physical Education, Post Graduate Program, Universitas Negeri Medan

Abstract
The aim of this research is to find out the contribution together with heavy bag stroke and horizontal swing training to increase the push ability of female athletes. The method used in this research is the experimental method. With the implementation of heavy bag stroke exercises and horizontal swing exercises. The population used in this study were all Unimed Hockey Club female athletes in 2012, totaling 18 people. The number of samples 8 people obtained by random sampling technique. Furthermore, he was given heavy bag stroke training and horizontal swing training. Research instruments for data collection were carried out by tests and measurements. Data analysis techniques using statistical procedures, then analyzed by regression tests. From the calculation of the data for the first, second and third hypotheses of push ability, the significance test of the multiple coefficients with dk (2: 1) at a significant level &

Keywords
Push, Heavy Bag Stroke, Horizontal Swing

Topic
Curriculum, Research and Development

Link: https://ifory.id/abstract/D9mnLBWz3MqQ