Indonesia Conference Directory

Corresponding Author
ayu aristika

Institutions
1 Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
2 Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
3 UIN Sunan Gunung Djati, Jl. A. H. Nasution No. 105, Bandung 40614, Indonesia

Abstract
Abstract. Advanced mathematical thinking ability is one of the abilities students must possess. Mathematics is a universal science that underlies the development of modern technology, which has an important role in various scientific disciplines and advances the power of human thought in underlying technological developments. To improve the ability of Advanced Mathematical Thinking students need to apply a learning model, one of them is learning Reciprocal Teaching. Reciprocal Teaching learning can improve the mindset and enthusiasm of students in learning so students actively discuss and explain the results of their work properly thus the ability of Advanced Mathematical Thinking in students can be seen and can be improved.

Keywords
Advanced Mathematical Thinking, Reciprocal Teaching

Topic
Mathematics Education

Link: https://ifory.id/abstract/Eru7tkzGQ69T

Corresponding Author
Bima Gusti Ramadan

Institutions
a) IKIP Siliwangi, Jalan Terusan Jenderal Sudirman Cimahi, Cimahi Tengah, Cimahi

Abstract
This study aims to analyze the links between students cognitive stages and creative thinking skills and mathematical learning interests. This study involved 36 11th grade students, test of logical thinking (TOLT), a description of the creative thinking ability (CTA), learning interest scale (LI). Based on TOLT, the study found the cognitive stage distribution of students as follows: 30% of students were in the formal stage, 25% were transitional stages, and 45% were concrete stages. In addition, the researchers found, overall in CTA and LI students achieve quality at a fairly good level. Judging from the cognitive stage of students, the quality of CTA and LI students in the formal and transition stages is classified as a fairly good level, and concrete students achieve the quality of CTA and LI at moderate levels. In addition to completing the CTA tasks, concrete students experience more difficulties while the students in the transition stage and the formal stage experience a little difficulty. Another finding is that there is no association between CTA and LI. Overall, the findings relate to the cognitive stage, the quality of the CTA and LI students based on their cognitive stages according to the childs Cognitive Development Theory.

Keywords
Cognitive Stage, TOLT, Creative Thinking, and Learning Interest Mathematics.

Topic
Mathematics Education

Link: https://ifory.id/abstract/yDZPbLQ2vVjw

Corresponding Author
Hery Sutarto

Institutions
Universitas Negeri Semarang

Abstract
The Central Java contingent is a contingent who often holds the overall title in the National Science Olympiad (OSN) competition with the DKI Jakarta contingent. From 17 OSN implementation since 2002, the Central Java contingent held the title 10 times, and the rest were taken by DKI Jakarta. Many factors influence a team to become champions, namely students as active actors, mentors, and also provincial education offices. This article materialized from the authors experience to become the Central Java Province OSN advisory team for elementary and junior high school for mathematics. Hopefully, this experience can be a reference for other provinces in guiding their best students so that it will be more competitive in the National Science Olympiad event.

Keywords
good practice ; mathematics ; olympiad

Topic
Mathematics Education

Link: https://ifory.id/abstract/j9p3dZBryaTw

Corresponding Author
Shinta Pratiwi

Institutions
Airlangga University

Abstract
The geographical situation of Indonesia as an archipelagic country and maritime country which has an area reaching two-thirds of its territory has high potential of marine and fisheries resources . This potential has to be relied upon to support the Indonesian economy but is threatened by the practice of illegal fiching. This study aims to design an operational information system using an automatic identification system , hereinafter referred to as the automatic operational identification system , which is installed in the LAPAN Satellite to detect illegal vessels entering Indonesia so that it can increase non-tax state revenues through fish catches. The research methodology used is quantitative exploratory research. This research resulted in the design of an automatic operational identification system for the detection of ships that violated and recognized the income of fish catches. The process is displayed in data flow diagrams, flowcharts, entity relationship diagrams, and examples of reports and illustrations of notifications.

Keywords
Ship Detection, Automatic Identification System, Operational Information System

Topic
Maritime Economics

Link: https://ifory.id/abstract/HpX8YFE9C4jn

Corresponding Author
Marthinus Boxy

Institutions
a)Economy and Business Faculty, Management, Universitas Mercu Buana
Jalan Meruya Selatan No.1, Jakarta

Abstract
Vanilla commodities are food needs needed for complementary mixtures of food needs, so the stability of the vanilla food supply chain needs to be well developed in maintaining sustainable needs. The measurement study of this research is the organization of the Perkumpulan Petani Vanili Indonesia (PPVI) where the organization aims to develop and improve supply chains for farmer groups incorporated in organizations throughout Indonesia. The improvement in the performance of the supply chain organization focuses on the SCOR 12.0 approach and is processed through the analytical hierarchy process (AHP) with the development of KPIs in supply chain performance attributes. The results of the analysis show that the attributes of reliability, agility, and cost have the lowest valuation so that further development and identification is needed in improving the performance of the supply chain. The discussion and further implications of this research are designing lean agriculture development, improving quality management and developing operational, technical cost structures in the supply chain objects.

Keywords
SCOR 12.0, Supply Chain Agriculture, and AHP

Topic
Operation and Flexibility Management

Link: https://ifory.id/abstract/L9DamhtVxwZn

Corresponding Author
Diah Fahmawati

Institutions
Magister Pengajaran Kimia, FMIPA, ITB
Jl. Ganesha 10 Bandung

Abstract
Nanopartikel perak (AgNPs) memiliki keunikan sifat dan memiliki aplikasi yang luas diantaranya dalam bidang sensor, katalis, anti bakteri dan biomedik. Ukuran partikel AgNPs, salah satu faktor yang menentukan sifat fisik dan kimianya, dipengaruhi oleh kondisi reaksi sintesisnya seperti reagen pereduksi, pH dan zat penstabil. AgNPs juga telah dilaporkan dapat meningkatkan laju reaksi oksidasi Rhodamin B (RhdB) oleh persulfat, tetapi sintesisnya perlu waktu lama dan kurang efisien. Pada penelitian ini, sintesis AgNPs dilakukan dengan metode reduksi kimia. Larutan NaBH4 dingin digunakan sebagai pereduksi dan glutathione (GSH) sebagai penstabil. Karakterisasi AgNPs dilakukan dengan spektrofotometri UV/Vis, Particle Size Analyzer (PSA), zeta potensial, FTIR dan HRTEM. Aktivitas katalitik AgNPs termodifikasi diukur dengan membandingkan laju discolorisasi Rhodamin B yang ditambahkan persulfate terhadap laju discolorisasi RhD B yang ditambah persulfat dan AgNPs. Karakterisasi produk degradasi Rhd B dilakukan dengan HPLC dan UPLC-MS. Hasil pengukuran PSA menunjukkan semakin besar rasio mol NaBH4 : AgNO3 semakin kecil ukuran AgNPs. Ukuran partikel AgNPs sebesar 8,4 nm diperoleh pada rasio mol NaBH4 : AgNO3 = 10:3 dan pH = 9. Ukuran partiel AgNPs menjadi lebih kecil (1,7 nm) ketika pH larutan dinaikkan menjadi 10. AgNPs dengan penstabil glutathione memiliki ukuran yang kecil yaitu 1,4 nm daripada ukuran partikel AgNPs dengan penstabil EDTA. Penambahan AgNPs pada oksidasi Rhd B oleh persulfat menyebabkan laju discolorisasi meningkat sekitar 4x. Reaksi oksidasi Rhd B oleh persulfat merupakan reaksi orde satu semu terhadap konsentrasi Rhd B. Analisis HPLC dan UPLC-MS menunjukkan degradasi Rhd B menjadi asam benzoat, trihidroksi benzoat dan isoindoline-1,3-dione.

Keywords
nanopartikel perak, katalis, degradasi Rhodamin B

Topic
Material

Link: https://ifory.id/abstract/QPafXbzq7yRC

Corresponding Author
Diah Fahmawati

Institutions
Magister Pengajaran Kimia, FMIPA, ITB
Jl. Ganesha 10 Bandung

Abstract
Pembelajaran sains di abad 21 menuntut adanya pembaruan dan mengikuti perkembangan IPTEKS. Teknologi nanopartikel saat ini telah berkembang pesat karena memiliki keunikan sifat dan aplikasi yang luas diantaranya dalam bidang sensor, katalis, anti bakteri dan biomedik. Pembelajaran kimia dengan mengintegrasikan nanopartikel belum banyak dikembangkan akibat minimnya alat dan bahan laboratorium. Pada penelitian ini dilakukan sintesis nanopartikel perak (AgNPs) untuk mengaktivasi persulfat dan digunakan untuk mendegradasi Rhodamin B (Rhd B). Prosedur degradasi Rhodamin B diadopsi menjadi modul pembelajaran kimia di SMA yang berkaitan dengan pengamatan reaksi secara kolorimetri dengan menggunakan data RGB dan reaksi terkatalisis. Larutan NaBH4 dingin digunakan sebagai pereduksi dan glutathione (GSH) sebagai penstabil. Aktivitas katalitik AgNPs diukur dengan membandingkan laju diskolorasi Rhd B yang ditambahkan persulfat terhadap laju diskolorasi Rhd B yang ditambah persulfat dan AgNPs yang diukur secara spektrofotometri. Foto diskolorasi Rhd B pada kedua sistem saat menit ke-0 sampai ke-80 yang didapatkan diukur nilai RGB dengan aplikasi color grab pada smartphone android dan digunakan sebagai data aktivitas katalitik untuk modul praktikum siswa. Hasil pengukuran dengan spektrofotometri UV/Vis, diskolorasi Rhd B oleh persulfat tanpa penambahan AgNPs sebesar 28,3% dan meningkat menjadi 81,3% pada penambahan AgNPs pada oksidasi Rhd B oleh persulfat. Hasil plot log At/Ao terhadap t menunjukkan reaksi oksidasi Rhd B oleh persulfat merupakan reaksi orde satu semu terhadap konsentrasi Rhd B. Hasil ini memiliki tren yang sama dengan pengukuran laju diskolorasi Rhd B dengan meggunakan data RGB. Nilai Red ( R) foto diskolorasi Rhd B yang dioksidasi persulfat tanpa AgNPs mengalami penurunan 9,46% dan meningkat pada oksidasi Rhd B oleh persulfat dengan penambahan AgNPs sebesar 21,25%. Modul ini dapat menjadi alternatif praktikum reaksi terkatalisis di SMA yang memiliki keterbatasan alat laboratorium seperti spektrofotometer UV/Vis.

Keywords
pembelajaran kinetika, kolorimetri, AgNPs, katalis, degradasi Rhd B

Topic
Pembelajaran

Link: https://ifory.id/abstract/WYZbuQ9DxjUh

Corresponding Author
Emir Syahreza Fadhilla

Institutions
*emirsyah97[at]gmail.com

Abstract
Sifat acak pergerakan harga saham dapat dimaknai bahwa terdapat variabel-variabel yang sulit diamati secara holistik atau dapat dianggap tidak diketahui (hidden) sehingga model kuantum merupakan kandidat yang baik dalam memodelkan pergerakan harga saham (Quantum Finance). Pada makalah ini digunakan model sumur potensial tak berhingga dengan dasar sumur tidak datar dengan profil yang bergantung pada volume untuk tiap-tiap harga saham pada periode tertentu. dilakukan juga analogi observable-observable dalam mekanika kuantum menjadi observable yang sesuai dengan pasar saham seperti harga saham sebagai posisi partikel, dst. Digunakan pula konsep temperatur pasar sebagai parameter volatilitas pasar. Dari model tersebut, didapatkan rapat probabilitas dalam ruang harga saham menggunakan metoda finite difference, sehingga dapat diprediksi harga saham paling mungkin untuk periode selanjutnya. Dilakukan trial and error dalam penskalaan parameter pasar saham menjadi observabel kuantum sehingga ditemukan bahwa harga saham harus dinyatakan dalam rupiah tetapi volume untuk profil potensial dalam sumur harus dinyatakan dalam triliun rupiah. Dengan menggunakan hasil tersebut, didapat prediksi apakah harga saham harian akan naik atau turun, dengan akurasi 100% untuk data yang kami miliki sehingga kami simpulkan bahwa metode ini dapat diandalkan, walaupun masih perlu dilakukan pengujian lebih lanjut.

Keywords
Harga Saham, Prediksi, Sumur Potensial, Quantum Finance

Topic
Komputasi dan Pemodelan

Link: https://ifory.id/abstract/chWHV7uKxe2B

Corresponding Author
Tri Hastono

Institutions
Universitas PGRI Yogyakarta

Abstract
A country is said to be progressing, if all regions of the country prosper. In Indonesia, the smallest area that runs the government function is the village. The legal basis regarding the village government itself is stated in Law No. 6 of 2014 Republic of Indonesia. In carrying out its functions as a government, the village is supported by village funds. Village funds sourced from the state budget are intended for the development and improvement of the welfare of rural communities. Village funds can go down based on the proposal submitted. The proposal for submitting village funds is processed by a work team called Tim 11. So far, the determination of village funds is still manual and less transparent. Therefore we need a system that can overcome the problem of determining village funds. This research provides alternative solutions regarding the determination of recipients of village funds using the weight product method. There are four criteria in this research, namely the number of residents in an RT area, the standard of living of an RT area, the extent of the area, the level of geographical damage in an RT area. And the object of the research chosen was Kasihan sub-district, Tamantirto village. the results obtained are a priority submission in writing the proposal submitted.

Keywords
Decision Support System;Village Funds;Weight Product

Topic
Computer Engineering

Link: https://ifory.id/abstract/nQLbpjBmKV8A

Corresponding Author
adhi kusmantoro

Institutions
(a)Faculty of Engineering and Information, University of PGRI Semarang, Jl. Sidodadi Timur No.24, Central Java 50232,Indonesia
*adhiteknik[at]gmail.com
(b)Faculty of Engineering and Information, University of PGRI Semarang, Jl. Sidodadi Timur No.24, Central Java 50232,Indonesia
(c)Faculty of Mathematics and Natural Sciences Information Technology, University of PGRI Semarang, Jl. Sidodadi Timur No.24, Central Java 50232,Indonesia

Abstract
The source of electricity in each university building in PGRI Semarang is obtained from each distribution transformer or power transformer. The power transformer used to distribute electricity in the central building (GP) has a capacity of 400 KVA, while the power transformer used in the main building (GU) has a capacity of 160 KVA. In the previous study, identification of the quality of electrical power in the PGRI University Semarang building, obtained a low power data factor and a large electrical network harmonics. The problem was solved by designing and installing bank capacitors and harmonic filters. To avoid dependence on PLN electricity and not using a generator when PLN electricity goes out, the source of electrical energy is designed by using solar energy sources through Photovoltaic. Solar Panel as an important component of solar power plants, converts sunlight into electricity. Generally we calculate the maximum amount of sunlight that is converted into electricity throughout the day is 5 hours. Electricity in the morning is stored in the battery, so electricity can be used at night, where without sunlight. Based on the identification of the load in the GP is 26.12 KW, then in the design using solar energy as many as 27 solar panels are needed. As for the storage system uses 44 batteries 100Ah battery. Off-grid solar panel systems are only used when PLN electricity goes out or can be used at night. The research method used is observing the amount of electrical load, calculating the capacity of solar panels and batteries, and simulating the model using a Power Simulator.

Keywords
Solar Panel, Battery, PLTS off-grid, Charger Controller

Topic
Computer Engineering

Link: https://ifory.id/abstract/t7GvhbHCc2mB

Corresponding Author
AZHAR AZIS

Institutions
(a*) Lecturer at Medan Area University
azizazhar5[at]gmail.com
(b) Lecturer at Medan Area University
(c)Profesor at Universitas Negeri Medan

Abstract
This research aims to determine the effect of organizational culture, job satisfaction, and organizational climate on the commitment of private junior high school teacher organizations in Deli Serdang Regency. Data sources were 140 people spread across various locations in Deli Serdang Regency. This type of research is quantitative by using path analysis. The technique and data collection instruments used to collect data for each variable are Likert scale model questionnaire techniques. To see the validity of the questionnaire items tested using product moment correlation. For the Analysis Requirements Test used are Normality Test and Linearity Test. While the Research Hypothesis Test used path analysis with manual systems and computer assistance SPSS for Windows version 20. From the results of the study found: a) there is a positive direct effect between organizational cultures on job satisfaction. b) There is a positive direct influence between organizational cultures on Organizational Climate, c) there is a positive direct influence between organizational cultures on organizational commitment, d) there is a positive direct influence between job satisfactions on organizational commitment, e) there is a positive direct influence between Organizational Climate on commitment organization.

Keywords
effect, organizational culture, job satisfaction, organizational climate, commitment

Topic
Economics, Business and Management Education

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

Corresponding Author
Rocky Marbun

Institutions
Program Doktor Ilmu Hukum, Univ. Jayabaya
Fakultas Hukum, Univ. Pancasila

Abstract
Digital Age 4.0 is only considered as a digitalization era that focuses on the progress of humanity. However, the digitalization process legitimizes the reduction of wealth in meaningful experiences of human life (ausdrück) with all the intuitive traits contained in humans. This trait that makes a person fully human becomes lost as what has been applied in Criminal Law so far. Finally, written and oral languages are also analyzed based on logical atomistic logic through the mechanism of decomposition of elements in the article. This study uses a normative juridical method based on secondary data through library research. However, this study also uses several approach methods, namely empirical approaches, conceptual approaches, philosophical approaches, pragmatic approaches, case approaches, and critical approaches. The results of this study indicate that the social context that has an effect on the creation of speech and writing is not considered in the process of proof through Criminal Law.

Keywords
Criminal Law, Communication, Law, Parole, Social Media

Topic
Criminal Law

Link: https://ifory.id/abstract/KzQbcNkL6UXY

Corresponding Author
Firmansyah Firmansyah

Institutions
a) Departement of Economics, Diponegoro University, Jl Prof Sudharto SH, Tembalang, Semarang, Indonesia
*firmansyah[at]live.undip.ac.id
b) Faculty of Economics, Universitas Negeri Semarang, Kampus Sekaran, Gunungpati, Semarang, Indonesia

Abstract
Tourism is one of the most dynamic economic sectors, which brings benefits to tourist destinations, which include employment, foreign exchange earnings, and generally drive the economy. This study analyzes the demand for labor in the tourism sectors in Indonesia. By considering the determinants of tourism labor demand, namely the price of wage labor, the price of tourism products, the price of other inputs both substitution and complement, and government policy. This study found that labor demand in tourism sectors was negatively affected and inelastic by labor wages, output prices, and government policies that significantly affected labor demand, while other input prices were not significant for labor demand.

Keywords
Labor demand, Tourism, labor wage, corresponding input of labor

Topic
Economics

Link: https://ifory.id/abstract/vV87gFfJkBT6

Corresponding Author
Raniyah M

Institutions
Department of Management, Faculty of Economics and Business, Universitas Indonesia, Depok, Jawa Barat, Indonesia

Abstract
This study aims to assess and evaluate the business model of airlines as an air cargo terminal operator. Correspondingly, to analyze the business model, the airline is run as an air cargo terminal operator on its own compared to if the cargo services outsourced to other parties at the terminal. This research uses a case study approach. The airline that will be the object of the study is the only one of the airlines in Indonesia that operates as non-integrated cargo services and manages air cargo terminal service. The analysis will conduct by performing financial analysis and comparative study analysis. After that, scenario analysis will lead and decided the priority of air cargo business. The result is when the company decides to outsource the business to the other party is better than if they run by themselves. From scenario analysis results, it shows that all the scenarios of the outsourced still better compared to if they run their business by themselves. The implications obtained from the research are the airlines will get cost efficiency, share the risk in irregularities, and widen the business opportunities through the other parties.

Keywords
Air Cargo, Terminal Operator, Financial Analysis, Warehouse Revenue, Comparative Study

Topic
Economics Education (Accounting, Cooperative and Office Administration Education)

Link: https://ifory.id/abstract/MwdKAcET8zVa

Corresponding Author
Nur Wahyu Ningsih

Institutions
Raden Intan State Islamic University
Jalan LetKol. Hi. Endro Suratmin Sukarame I, Bandar Lampung 35131, Indonesia
*nurwahyu.ningsih107[at]gmail.com

Abstract
This study aims to provide empirical evidence regarding stock returns as the impact of Managements Discussion and Analysis disclosure on companies listed in the Jakarta Islamic Index, Indonesia Stock Exchange, in the 2015-2017 period. The motivation behind this research is the absence of research in Indonesia which studies the presentation of MD & A which influences investors decisions to invest in companies listed in the Jakarta Islamic Index, seen from the companys stock returns. This study used 63 samples. The hypothesis in this study was tested using a partial correlation of simple linear regression. The results showed that there is a positive relationship between MD & A disclosure of stock returns. From the results presented, it is expected that companies listed in the Jakarta Islamic Index can disclose MD & A fully and openly so that they can attract investors to invest. With the increase in stock returns to the value of the company, the existence of Islamic stocks can be increased. Therefore, Indonesia is expected not only to become a large market and place for the Muslim population but also to empower its people through the halal industry including the existence of Islamic stocks in Indonesia.

Keywords
managements discussion and analysis (MD&A), Jakarta Islamic Index, sharia stocks.

Topic
Islamic Capital Market

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

Corresponding Author
I Gusti Agung Ayu Made Diastika Inkasari

Institutions
TELKOM UNIVERSITY

Abstract
Creative economy is one of the solution to suppress unemployment rate in Indoensia while giving contribution to GDP. The 7th Sky Foundation is a non-profit organization which carry out mission to improve creative industry in Bandung. It consists of 12 creative committee which music committee is one of them.The objective of this research is to identify social entrepreneurship dimension which consists of innovativeness, proactiveness and risk management in order to prevent constraint of social mission, environment and sustainability within Music Committee in 7th Sky Foundation. Social entrepreneurship approach is used in this research since Music Committee has objective to develop music industry by performing incubation program for junior musician with no fix business model attached on it. This concept fits well with social entrepreneurship theory. This research belongs to qualitative study. Data were collected from interviews with five participants who actively involve in Music Committee program. Participants were chosen by convenience sampling technique. The result shows the same pattern between the five participants that they are always socially-oriented in doing incubation programs which in order to achieve those social mission, musician had to face constraints from environment and need for sustainability. In order to survive in music industry, innovative behaviors are needed to produce music. Moreover, proactive behaviors are needed to seek for opportunity and to understand market hence the strategy formulated will match the market needs and wants. There are risks in music industry that need to be mitigated, consequently it needs risk-management skill to avoid those unexpected risks.

Keywords
social entrepreneurship, creative economy, music

Topic
Strategic Management, Entrepreneurship and Contemporary Issues

Link: https://ifory.id/abstract/bZj3FXYfkKAy

Corresponding Author
Shifa Nabila

Institutions
a) Master of Management, Faculty of Economics and Business, University of Indonesia, 10430 Jakarta
*Shifa.nabila71[at]ui.ac.id
b) Master of Management, Faculty of Economics and Business, University of Indonesia, 10430 Jakarta

Abstract
This study aims to identify five factors in YouTube advertising (entertainment, informativeness, customization, irritation and credibility) which might effect on ad value, and attitude toward YouTube ads, leading to purchase intention of consumers. The study uses conceptual models where their hypothesis is that the ad value is positively correlated with respect to the attitude toward YouTube ads, which then affects consumer-s purchase intention. For this study, our respondents include 248 active YouTube users in Indonesia that will be used for data collection and analysis. In conclusion, this study found that entertainment, customization, and credibility is positively effected to advertising value on YouTube, where ad value has a positive effect on attitude toward YouTube ads and purchase intention of consumer. In addition, this study found that irritation is negatively effected to advertising advertising value on YouTube, and informativeness has no effect on advertising value on YouTube

Keywords
Ad value; attitude toward YouTube ads; credibility; customization; entertainment; informativeness; irritation; purchase intention

Topic
Marketing Management

Link: https://ifory.id/abstract/KWhEMGLT264v

Corresponding Author
Ira Dwi Mayangsari

Institutions
1,2,3Telkom University, Bandung, Indonesia
4Sekolah Tinggi Ilmu Ekonomi Pandu Madania, Bogor, Indonesia

Abstract
Technology brings higher opportunities for business even though company should take higher investment for system and higher IT training cost for employees. Small medium enterprises (SMEs) with their limitation of capital and resources are aware to leverage their technology adoption in order to gain competitive advantages. This study explores research over three years in Indonesia related to SMEs and technology. Finding exhibits field of studies and research result of SMEs and technology. Further, a model of how SMEs will get benefit from IT will be offered. Then, the authors suggest that in future scholars have to build and develop models of how SMEs should adopt technology and have optimal benefit from it.

Keywords
SMEs, IT, research

Topic
Strategic Management, Entrepreneurship and Contemporary Issues

Link: https://ifory.id/abstract/kYRhG37bnzW4

Corresponding Author
Muhammad Rifai

Institutions
a) Center of Science and Technology for Advanced Material, National Nuclear Energy Agency
Kawasan Puspiptek, Serpong, Tangerang 15314, Indonesia.
*iamrifai[at]yahoo.com
b) Department of Mechanical Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0394, Japan.

Abstract
Corrosion fatigue properties of ultrafine grained (UFG) Fe-20%Cr steel by equal channel angular pressing (ECAP) was investigated in term of grain refinement and stored energy. Iron chromium alloy as referred to as stainless-steel has been wide used as a material for cardiovascular stents, orthopedic and different implants used as biomedical application because of the plasticity and corrosion resistance. The improvement of strength was related to the grain refinement by ECAP process, however the decreasing of ductility is occurred. Effect of the grain boundary status can be examined by comparison between equilibrium dan non-equilibrium by annealing at 698 K. Under annealing temperature of 698 K, due to the recovery stage, there was a little difference in microstructure from the four passes ECAP. The corrosion fatigue life of the ECAP processed and the post-ECAP annealed sample was analyzed. Two mechanisms for crack propagation have been well recognized for stainless steel. One is slipping step dissolution mode. In this model, the slip step formed by active dislocation at a crack tip is anodic dissolution reaction, so that crack tip advance to further distance. The other is stress adsorption mechanism. The corrosion fatigue cracks initiation and cracks propagation process of iron-chromium alloy can be characterized by corrosion pits and intergranular fracture, respectively.

Keywords
Iron chromium; grain refinement; ECAP; Corrosion fatigue

Topic
Materials Science

Link: https://ifory.id/abstract/TAd6p4gfBkcN

Corresponding Author
Muhammad Rifai

Institutions
a) Center for Science and Advanced Material Technology, BATAN, Serpong, Indonesia
*iamrifai[at]yahoo.com
b) Center for Nuclear Fuel Technology, BATAN, Serpong, Indonesia
3Synchrotron Light Research Institute (SLRI), Thailand

Abstract
Zirconium-based materials have attracted extended analysis interest because of their high structural practicality, excellent chemical sturdiness, and intractableness. ZrO2 is additionally wide identified to be used as a surrogate for learning the mechanism of UO2 kernel fabrication of High-Temperature Reactor (HTR) fuels. ZrO2 has similar properties to UO2 system in such a way that microbeads are of paramount importance, especially in the case of such nuclear stimuli-responsive systems. This beads stability will be strongly correlated to the precursor composition and the steps of the synthesis process. One of the simple synthesis processes of ZrO2 microbeads is by gelation process, which could be carried out by internal gelation or external gelation. This article will discuss the synthesis result of ZrO2 microbeads system using external gelation process to understand the gelation process with the emphasis will be given to the interaction of PVA-THFA host–ZrO2 guest systems. FTIR and thermal data were thoroughly explored to derive the mechanism during the gelation process concerning conventional gels in describing general aspects of gel formation.

Keywords
Zirconium; HTR, Surrogate; Gel Formation; Morphology

Topic
Materials Science

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

Corresponding Author
Tri Widjaja

Institutions
(a) Chemical Engineering Department, Institut Teknologi Sepuluh Nopember, Sukolilo, Surabaya, 60111, Indonesia
*triw[at]chem-eng.its.ac.id

Abstract
Abundant coffee pulp waste can be used as a potential biogas feedstock due to its high cellulose and hemicellulose content. However, it contains lignin, caffeine, and tannin that cause severe effects on microbial activity inside the digester, leading to ineffective biogas production. Therefore, alkaline hydrogen peroxide followed by rumen fluid pretreatment had been performed to remove those compounds and improve digestibility of the substrate, respectively. Moreover, the study obtained to find the reaction kinetics in biogas production from coffee pulp waste using a semi-continuous anaerobic reactor with HRT 20, 25, 30 and 35 days and a working volume of 1.5 L operated at 37 oC. In this study, the chemical pretreatment resulted in 75% of lignin removal, 57.76% of caffeine removal and a decrease in tannin until 0.54%. The highest methane yield obtained in this study was 0.24 L CH4 g VS-1. The kinetic constants (k) obtained were; k1 (reaction-s kinetic constant): 0.2923 day-1; k2 (maximum rate of soluble organics production/degradation): 720.1309 mg SCOD L-1 day-1; k3 (saturation constant): 253.2091 mg SCOD L-1 day-1; k4 (maximum rate of TVA consumption): 1,426.0831 mg TVA-COD L-1 day-1; and k5 (saturation constant): 57,794.4025 mg TVA-COD L-1 day-1.

Keywords
Biogas; Coffee pulp waste; Kinetic constants; Pretreatment; Semi-continue anaerobic reactor

Topic
Chemical Engineering

Link: https://ifory.id/abstract/vE7UTrjLx9AC

Corresponding Author
Tuty Emilia Agustina

Institutions
a) Chemical Engineering Department, Universitas Sriwijaya
Jalan Palembang Prabumulih Km 32 Inderalaya, Indonesia
*tuty_agustina[at] unsri.ac.id
b) Chemical Engineering Department, Bandung Institute of Technology
c) Chemistry Department, Sebelas Maret University

Abstract
The environmental pollution caused by the waste and the strict regulations of waste were currently a major concern for industries, such as the palm oil industry. Constraints experienced today are the difficulty of degradation process of the waste due to the high quantity and the content of contaminants in the waste. One of the efforts that can be prepared to reduce the negative impact is by using the waste as a raw material for biodiesel. Among the potential wastes to become a raw material for making the biodiesel is the wastewater from the cooling pond as a part of the wastewater treatment in palm oil industry. The objectives of this research are to study the process of oil separation from wastewater cooling pond by liquid-liquid extraction method to recover oil and use it as a raw material for making biodiesel. Extraction is carried out at room temperature. The solvent type, wastewater sample to solvent ratio, and extraction time were varied. Based on the results, the highest oil yield of 90% was reached by using n-hexane solvent, the wastewater sample to solvent ratio of 2: 3, and extraction time of 72 hours, while the acid number of 78.49 mg KOH/g oil was obtained. The separated oil can be used as a raw material for making biodiesel through the esterification and transesterification processes. The biodiesel produced has been met the standard of SNI 0471822006 for density, kinematic viscosity, acid number, saponification number, methyl ester, free glycerol, total glycerol, and oxidation stability.

Keywords
liquid-liquid extraction, oil recovery, cooling pond wastewater, biodiesel

Topic
Chemical Engineering

Link: https://ifory.id/abstract/r7AQXv8DtBLK

Corresponding Author
Fauzan Maulana Harahap

Institutions
UNIKOM

Abstract
One minute video is popular in 2017 from a social media became a social media platform Instagram which app limit users to upload video until one minute. This thing became a good method for making people watch a full of information just in one minute and it is so effective. In this research, the writer will review and look deeper why one minute is became a trend and why that limit time be chosen through some oberseve to users and makers of videos, literatures will be source too. This research is good for anyone who wants give impact of influence for just short time of audio visual.

Keywords
Limited effective video

Topic
Visual Communication Design and Interior Design

Link: https://ifory.id/abstract/kUnhErF6QGm2

Corresponding Author
Mohamed Shafiq Mohamed Ayub

Institutions
FACULTY MODERN LANGUGAGES AND COMMUNICATION
UNIVERSITI PUTRA MALAYSIA (UPM)

Abstract
A strong organizational reputation can take years to develop, yet it can easily be damaged or destroyed with a single crisis event. The purpose of this study is to look at how Rayani Air executed its crisis communication strategies during the suspension of the orgnaization and the youth perceptions of the credibility of different response strategies used by Rayani Air. The study is rooted from the socio-psychological tradition to aid in predicting when a communication behavior will succeed and when it will fail. It is a case study of Rayani Air- crisis communication strategies consisting of both a qualitative and quantitative research and better known as a mixed methods research. The qualitative research is carried out to support the quantitative methods. Five informants were interview in depth to support both the quantitative data using a descriptive analysis.

Keywords
Crisis Communication, Crisis, Situational Crisis, Image Restoration

Topic
Halal Business Management, Marketing, and Communication

Link: https://ifory.id/abstract/jPTbyf6LzqVF

Corresponding Author
Sopiah sopiah

Institutions
a) Department of Management, Faculty of Economics, Universitas Negeri Malang
b) Department of Management, Faculty of Economics, Universitas Negeri Malang
c) Sekolah Tinggi Keguruan dan Ilmu Pendidikan (STKIP) PGRI Pasuruan

Abstract
The existence of companies earning profits through extracting of natural resources from community-s/inhabitant-s environment generates the growing awareness about the concept of Corporate Social Responsibility (CSR). Aspects of CSR related to employee participation require support from human resource management (HRM). Although researches linking the role of HRM and CSR has experienced a significant increase, but there is still no comprehensive construct that examines these two concepts. This study aims at exploring the structure of CSR-HRM at PT Kutai Timber Indonesia (PT KTI), the role of HRM in the development and implementation of CSR, and the contribution of HRM in corporate sustainability through CSR at PT KTI. The research approach used a qualitative approach to the type of case study research. Data collection techniques used: in-depth interviews, observation, documentation. Data analysis in this study was carried out through three stages, namely data reduction, data presentation, and final conclusion. The validity test of data is used the method of source triangulation and technical triangulation. The research findings conclude that the understanding of CSR adopted by PT KTI was still focused on the external dimension, so the structure of PT KTI-s CSR-HRM was limited to administrative relations. HRM in the HRD Department of PT KTI does not have a strategic role related to the development of CSR, but has an administrative role related to employee licensing in implementing CSR. PT KTI-s HRD department contributes to corporate sustainability through HRM core tasks. The limitation of this study is its limitation to be generalized to other sites/objects. The sound generalization could be applied only to objects/sites that have similar or similar characteristics

Keywords
CSR; the role of HRM; corporate sustainability; PT KTI

Topic
Management, Organization, Leadership and IT

Link: https://ifory.id/abstract/Wuz38XUVwqBH

Corresponding Author
Inayati Nuraini Dwiputri

Institutions
Universitas Negeri Malang

Abstract
The data used in this study is IFLS data with fixed effect estimation method. The study shows that informal credit has a more negative impact on household welfare compared to the use of formal credit. And, the use of semi-formal credit has a more negative impact on household welfare compared to the use of formal credit. It can be due to higher interest rates in the use of informal credit compared to semi-formal and formal credit. This study also shows that credit used for productive purposes has a more positive impact than credit used for consumptive purposes. The greater the amount of credit used, the more positive the impact on household welfare is compared to the use of fewer loans. The results of this study can be the basis for the government to be concerned about the policy of credit interest rates to the public.

Keywords
formal credit, semi-formal credit, informal credit, interest rate

Topic
Islamic Banking, Finance, Insurance, and Sharia Accounting

Link: https://ifory.id/abstract/rDAjWNeL4ypu

Corresponding Author
Nadiyah Rachman

Institutions
Institute of Technology and Health Bali

Abstract
Death caused by Acute Coronary Syndrome (ACS) remains high because people do not have sufficient knowledge in interpreting the perceived sign and symptoms. This has an impact on the lack of people-s attitudes and beliefs in seeking health services. Providing information is a key factor to increase knowledge, attitude and belief toward ACS. This study aimed to determine the effect of health education on knowledge, attitudes and beliefs about acute coronary syndrome in Public Health Centre Tabanan III. This research implemented pre-experimental design. There 38 samples involved in this research which were selected through purposive sampling in the Public Health Centre Tabanan III. The health education was provided through 30 minutes presentation with the media of brochure and flyer. The data were collected by using ACS Response Index questionnaire and analyzed by using Wilcoxon Signed Rank Test. The result of Wilcoxon Signed Rank Test showed there was a statistically significant increase in knowledge, attitudes and beliefs after they were given health education. On the domain of knowledge, z = –5.40, p<0.001, r = 0.61, median score increased from pre-program (Md = 10) to post-program (Md = 16). On the domain of attitudes, z = –5.38, p<0.001, r = 0.61, median score increased from pre-program (Md = 8.5) to post-program (Md = 17). On the domain of beliefs, z = –5.40, p<0.001, r = 0.62, median score increased from pre-program (Md = 18) to post-program (Md = 21). There is an effect of health education on knowledge, attitudes and beliefs about acute coronary syndrome in Public Health Centre Tabanan III.

Keywords
Knowledge, Attitudes, Beliefs, Acute Coronary Syndrome

Topic
Education and Learning

Link: https://ifory.id/abstract/4gBd3R9VbfNr

Corresponding Author
Ni Komang Nia Gitawindari

Institutions
Institute of Technology and Health Bali

Abstract
The consumption of iron supplement is one of the efforts to prevent anemia among female teenagers. Adequate knowledge and attitude are key factors for iron supplementation. This study aimed to determine the effect of providing health education on the level of knowledge and attitudes of female teenagers on the consumption of iron supplement. A pre-experimental design with one group pretest posttest approach was employed in this study. Samples consisted of 42 students grade ten in Vocational High School SMK Negeri 1 Tabanan, selected using stratified random sampling technique. The data were collected by using questionnaire of knowledge and attitude which were self-developed by the researcher and analyzed by using the Wilcoxon sign rank test. Age of the respondents ranged from 15-16 years. Wilcoxon Signed Rank Test revealed a statistically significant increase in knowladge and attitudes after receiving education. On the domain of knowledge, z = -5.687, p<0.001, r = 0.62, median score increased from pre-program (Md = 14) to post-program (Md = 20). On the domain of attitudes, z = -5.652, p<0.001, r = 0.61, median score increased from pre-program (Md = 28) to post-program (Md = 39). There is an influence of the provision of health education on the knowledge and attitudes of female adolescent about the consumption of iron supplement at Vocational High School SMK Negeri 1 Tabanan.

Keywords
Knowladge, Attitude, Anemia, Iron Supplement

Topic
Education and Learning

Link: https://ifory.id/abstract/uPWmYdkvqEx8

Corresponding Author
Benidiktus Tanujaya

Institutions
University of Papua

Abstract
The purpose of this research was to study the application of think pair share, the type of cooperative models, which can be implemented in mathematics instruction in Manokwari, West Papua Indonesia. This study was conducted at Senior High School of Manokwari (SMA Negeri 1) and Mathematics Education Department, the University of Papua. The research was carried out using research and development methods. The results showed that there were two main things in the application of the think pair share model in mathematics instruction in Manokwari West Papua, particularly the selection of group members and the determination of the number of group members. Group members must consist of students who already know each other well, while the number of group members must start from two students.

Keywords
modification of think pair share, mathematics instruction

Topic
Mathematics Education

Link: https://ifory.id/abstract/Dnc3wZpWTX9e

Corresponding Author
Muhammad Irfan

Institutions
Universitas Negeri Malang

Abstract
Interference can occur because of the existence of two or more information/knowledge, which is mixed. Interference is due to the similarity of information/knowledge that is close together. One of the material in SMP that allows interference is a proportion. This study aims to develop a proportion test instrument to identify students thinking interference in solving problems. The question instrument contained three questions, namely direct proportion and inverse proportion and two types of proportions in one question. The development process involves experts both in the field of mathematics and in the field of mathematics education so that instruments are valid questions. Also, the development process involved 32 seventh grade junior high school students in one of the junior high schools in Yogyakarta. The result is that the instruments developed are declared valid and can be used to identify students thinking interference in solving comparison problems. This is reinforced by the results of trials that of 32 junior high school students, six students were wrong in solving comparative problems of value, 17 students were wrong in the turnover ratio, and 14 students were wrong if both types of comparisons were present together. Of the students who experienced this error, there were more than 40% who indicated interference thinking.

Keywords
interference, proportion, instrument test for interference, validity instrument test

Topic
Mathematics Education

Link: https://ifory.id/abstract/eTbDYE4pXyPB