Indonesia Conference Directory

Corresponding Author
sofia fatmawati

Institutions
Fakultas Farmasi Universitas Muhammadiyah Prof Dr Hamka

Abstract
Madu adalah cairan alami yang umumnya mempunyai rasa manis yang dihasilkan oleh lebah madu dari sari bunga tanaman atau bagian lain dari tanaman. Dalam penelitian ini dilakukan karakterisasi madu komersial yang dijual di indonesia dengan perbedaan jenis sumber bunga dengan penambahan gula menggunakan Spektrofotometri FT-IR. Gula seringkali digunakan sebagai campuran madu komersial guna mengurangi biaya produksi atau pada kasus pemalsuan. Madu bunga kapuk, madu bunga kelengkeng, madu multiflora, glukosa, fruktosa dan sukrosa masing-masing diamati spektrum FT-IR pada rentang inframerah tengah (4000-650 cm-1). Pengamatan spektrum juga dilakukan pada madu yang ditambahkan dengan masing-masing gula dengan konsentrasi 10%-90%. Perbedaan sumber bunga dan gula memberikan perbedaan spektrum pada beberapa puncak absorban. Model PCA (Principal Component Analysis) dengan 2 principal component digunakan untuk mengidentifikasi perbedaan profil puncak antar spektrum. Analisis PCA dan spektrum inframerah dapat membedakan jenis sumber bunga madu dan madu yang telah ditambah dengan gula.

Keywords
madu, gula, infra merah, kemometrik

Topic
Teknologi Panen dan Kontrol Kualitas

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

Corresponding Author
Norma Tiku Kambuno

Institutions
1) Department of Medical Laboratory Technic , Poltekkes Kemenkes Kupang
2) Department of Pharmacist , Poltekkes Kemenkes Manado
3) Department of Nurse Dental, Poltekkes Kemenkes Semarang

Abstract
Background: Hepatitis B caused by hepatitis virus infection B (HBV) is a world health problem including Indonesia. Results of 2013 Basic Health Research estimated that there were 1,2% of the population in Indonesia with Hepatitis and East Nusa Tenggara was the province with the highest Hepatitis B prevalence (4,3%). Transmission can be through vertical (perinatal) and horizontal (house contact). Aims; The purpose of this study was to analyze the risk factors for transmission at home contact from students with HBsAg reactive. Methods; This study was performed in two phases. The first phases, November 2015, examination of HBsAg status with ELISA sandwich method was conducted on 341 students of Senior High School Kupang city obtained 45 samples with HBsAg reactive. The second phase, June 2016, out of 23 students HBsAg positive cases and 89 samples of family members were enrolled and evaluated. Of family members, 18 samples were found with HBsAg reactive, 6 subjects (33%) were fathers, 4 subjects (22%) were mothers, 5 subjects (28 %) were sisters and 2 subjects (11%) were brothers and 1 subject (6%) were others family members. Statistical analysis with Chi Square (X2) and Odds Ratio. Results: There is no significant relationship between HBsAg status with sex and age. There is significant relationship between HBsAg status with education, and marital status. The values were obtained (OR=0,184, 95%, Cl; 0,059-0,579) for education and (OR=0,204, 95%, Cl; 0,07-0,597) for marital status. Conclusion; The presence of family members with reactive HBsAg can transmit to other family members, 25% of family members also detected reactive HBsAg. More attention should be paid to HBV vaccination for family members of HBV patients.

Keywords
Risk Factors, Home Contact, HBsAg Reactive

Topic
MEDICAL LABORATORY TECHNOLOGY

Link: https://ifory.id/abstract/TayvA3t8YCqn

Corresponding Author
Dina Zakiyyatul Fuadah

Institutions
(a) Stikes Karya Husada Kediri

dzakiyyaf09[at]gmail.com

Abstract
The maternal role attainment in the anticipatory phase could be achieved through Prenatal Class. Prenatal Class has an impact towards the maternal role attainment, it is because of the Prenatal Class activity provides information needed during the pregnancy, so that the psychology maturity and adulthood are achieved. The aim of this research is to analyze the effect of Prenatal Class towards the maternal role attainment in pregnant women in Puskesmas Baron Kecamatan Baron Kabupaten Nganjuk. This is a Quasy Experiment research with Non-Equivalent Control Group approach. The population in this research is primigravida pregnant women in Baron area with total population of 89 person. The sampling technique used purposive sam-pling with the total number of samples of 30 person. The research result held before the Prenatal Class activity showed that more than half of the maternal role attainment (53.3%) in the category of less in the readiness in the maternal role attainment. After the Prenatal Class was being conducted, more than half of the respondents (60%) were good in the readiness in the maternal role attainment. The Prenatal Class gave the optimal results if it is held regularly by the pregnant women by providing pregnancy education, as well as the necessity of the family support and care giver in assisting to achieve the maternal role attainment.

Keywords
Prenatal Class, Maternal role attainment

Topic
MATERNAL, NEONATAL, AND CHILD HEALTH

Link: https://ifory.id/abstract/ZJHUmLbCXn8h

Corresponding Author
Silvi Asna Prestianawati

Institutions
a,c,d) STIEKN Jaya Negara Tamansiswa
Jl. R. Tumenggung Suryo No.17, Bunulrejo, Kec. Blimbing, Kota Malang, Jawa Timur 65123


b*)Universitas Brawijaya
Jl. Veteran, Malang
silvi.febub[at]gmail.com

Abstract
This study aims to know the impact of technological innovation on unemployment in Indonesia. TAR and ARIMA are the methods used in this study. The analysis shows that there is a relationship between LFP and positive relationship with GDPC which proves that the higher the GDP, the higher the employment absorption. There is a negative relationship between PAT and LFP which proves that technological innovation in Indonesia suppresses employment opportunities and increases unemployment. The direction of the population growth relationship is not in the same direction as work participation. Then the higher population growth will increase the level of unemployment in Indonesia.

Keywords
Technological Innovation; Unemployment; TAR; ARIMA; Labor

Topic
Economics

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

Corresponding Author
Silvi Asna Prestianawati

Institutions
a,b,d) STIEKN Jaya Negara Malang
Jl. R. Tumenggung Suryo No.17, Bunulrejo, Kec. Blimbing, Kota Malang, Jawa Timur 65123

c*) Universitas Brawijaya
Jl. Veteran Malang
silvi.febub[at]gmail.com

Abstract
This paper aims to measure and forecast salt price based on cost and price rationality. The research employed quantitative method with Ordinary Least Square Model for measuring the rationality of salt and ordinary least square for forecasting salt cost and price in order to describe salt cost and price behavior. Although the demand for salt increases every year, the abundant and cheap raw materials as well as the growth of the domestic production of salt business do not correlate positively with the growth of demand. We focus on measuring and forecasting price rationality as a proxy for the salt business prospects in Indonesia. We found that salt price formed at the time of the study was higher than the normal one. This is contrary to the motive theory of entrepreneurs, making the salt business in Indonesia remain a mystery.

Keywords
Salt, Price Rationality, OLS

Topic
Economics

Link: https://ifory.id/abstract/8pY2BJe6aTCx

Corresponding Author
Kadarudin Kadarudin

Institutions
Faculty of Law, Hasanuddin University

Abstract
Coral reefs are one of the most productive and richest ecosystems on earth. Coral reefs provide enormous benefits for millions of coastal communities. However, coral reefs face a range of threats including overfishing, coastal development, damage due to shipping lines. The problem that will be discussed in this paper is how regulations in Indonesia regulate and protect coral reefs? and how to prevent damage to coral reefs caused by humans?. This research is normative legal research, using a statutory approach and case approach. The collected data were analyzed qualitatively, then described to answer the problems in this study. The results showed that Indonesia already has several national regulations governing and protecting coral reefs in Indonesia. as an implementation of these various rules, the Indonesian government has launched a coral reef rescue program, also known as the "Coral Reef Rehabilitation and Management Program". In its implementation the program is realized in 5 components of activities, while the form of prevention to protect the condition of coral reefs from the influence of nature or human activities, is done by (1) prevention and control of pollution; (2) prevention and control of coral mining; and/or (3) determination of Conservation Areas

Keywords
coral reef, damage, Indonesia, prevention efforts, regulations

Topic
Maritime, Environment and international policy

Link: https://ifory.id/abstract/ZYb4kRUd7P9t

Corresponding Author
Siti Nuraini

Institutions
1 Department of Accountancy, Airlangga University
Jl. Airlangga 4-5 Surabaya
2 Department of Health Promotion and Behavioral Science
Kampus C Unair Jl. Ir. Soekarno, Surabaya

Abstract
The poverty alleviation policies will be able to increase regional economic productivity that they can contribute to national income for developing countries. As one of the national programs expected to reduce poverty, village funds are expected to directly touch problem of poverty in rural areas. Based on the needs of each village, it is expected that priority of use and benefits can be received directly by the community. This research will look for implementation of village funds during 2015 until now in the East Java as one of the poverty alleviation programs. The research used qualitative descriptive, which is research that emphasizes the quality of the process rather than merely the final result. The method used in this study are in-depth interviews, observation and study of literature. As one of the programs expected to be able to reducee poverty, the majority of village funds in East Java are dominated by infrastructure with a labor-intensive approach for the poor people, so that they only have a short-term effect in the process of poverty reduction

Keywords
village fund; alleviation program, implementation review

Topic
Quality Management and Economic Development

Link: https://ifory.id/abstract/6Gf4TFRZMA3u

Corresponding Author
Fitriya Fauzi

Institutions
Universitas Bina Darma

Abstract
Bisnis kuliner di kota Palembang merupakan salah satu bisnis keluarga yang sudah turun temurun, bisnis kuliner tersebut dalam beberapa tahun ini dapat menciptakan peluang pertumbuhan bagi lapangan kerja dan peningkatan kemampuan sumber daya . Manajemen bisnis keluarga banyak dikendalikan dan dioperasikan oleh satu anggota atau beberapa keluarga dan banyak bisnis keluarga memiliki anggota non keluarga sebagai karyawan. Tujuan penelitian ini peran knowledge manajemen dalam menciptakan daya saing dengan beberapa faktor yang harus diperhatikan seperti faktor pengembangan generasi penerus, teknologi informasi, dan pengembangan usaha. Penelitian ini menggunakan pendekatan kualitatif melalui wawancara mendalam dan observasi langsung. Hasil penelitian ini menunjukkan bahwa bisnis kuliner dalam bisnis keluarga masih dilakukan tradisional penerapan teknologi masih terbatas sehingga perlu adanya peran knowledge management agar mampu mengidentifikasi pengetahuan agar dapat mewujudkan daya saing dan berkelanjutan sebagai tolak ukur keberhasilan bisnis keluarga khususnya bisnis kuliner di kota Palembang.

Keywords
Knowledge Management, sumber daya manusia, bisnis keluarga

Topic
Manajemen Sumber Daya Manusia

Link: https://ifory.id/abstract/nHKkAqCQY6vF

Corresponding Author
Fitriya Fauzi

Institutions
Universitas Bina Darma

Abstract
Analisis perbedaan gender dalam pengembangan karir pada asn di kota palembang

Keywords
Analisis perbedaan gender dalam pengembangan karir pada asn di kota palembang

Topic
Manajemen Sumber Daya Manusia

Link: https://ifory.id/abstract/3JnFkr9hucC7

Corresponding Author
Ahyar Muhammad Diah

Institutions
Politeknik Negeri Samarinda

Abstract
McDonald-s merupakan salah satu restoran cepat saji yang ada di Samarinda. Untuk memenangkan pasar, setiap restoran memiliki strategi pemasaran yang berbeda-beda. Oleh karena itu, tujuan dari penelitian ini adalah untuk menganalisis pengaruh harga, tempat dan kualitas layanan terhadap loyalitas pelanggan melalui kepuasan pelanggan sebagai variable penghubung. Objek dari penelian ini adalah pelanggan McDonald-s Samarinda. Sampel yang digunakan yaitu 144 responden dengan pendekatan pengambilan sampel secara kebetulan (accidental sampling). Data dikumpulkan dengan menggunakan kuesioner, didistribusikan kepada responden, kemudian dianalisis dengan menggunakan skala Linkert kuesioner 5 dan alat analisis Statistical Product and Service Solution (SPSS) dan Structural Equation Modelling (SEM). Hasil analisis menunjukkan bahwa variabel harga, tempat, dan kualitas layanan berpengaruh signifikan kepuasan dan loyalitas pelanggan.

Keywords
Harga, Tempat, Kualitas Layanan, Kepuasan Pelanggan, dan Loyalitas Pelanggan

Topic
Manajemen Pemasaran

Link: https://ifory.id/abstract/ThvFW2YQd73m

Corresponding Author
Anugrah R.W.

Institutions
UM

Abstract
In order to explore Fe minerals in Tiga Warna (Tiga Warnaed) Beach, we investigated to assess of geochemical fraction of Fe in sediment. The samples were leached of Fe using the optimized BCR microwave method. The optimized of BCR microwave method revealed the high accuracy and precision before Fe assessment. The leached of Fe in each of fraction in sediment were measured by AAS. The same patterns of explored Fe in the geochemical fractions from the sediment fraction 1 (mobile fraction) to fraction 3 (oxidisable fraction) as stated nonresistant sediment fractions showed lower portion of Fe compared with the Fe levels in sediment fraction 4 (residual fraction) or resistant sediment fraction. The Pollution Load Index (PLI) value and the geoaccumulation Index (I-geo) value of sediment samples in blue, green, and red waters indicating that the sediments of Tiga Warnaed Beach are still natural and has not been categorized as polluted.

Keywords
Fe, Sediment, BCR Microwave, PLI, I-geo, Tiga Warnaed Beach

Topic
Biomass, Biofuel

Link: https://ifory.id/abstract/aYyAWEqfpK2t

Corresponding Author
Anugrah R.W.

Institutions
UM

Abstract
Calcium is a metal whose presence can be used as an indicator of ocean acidification. Acidification of sea water occurs due to the effects of global warming. The form of Ca in calcium carbonate can be leached under acidic conditions. The assessment of Ca is very important to control of coral bleaching. This research used the BCR microwave method to investigate the residence of Ca bound to each fraction. The results showed the residence of 73 percen in fraction 1 and 22 percen in fraction 4 from total of Ca in sludge sediment. The highest level of Ca (64350.27 mg / kg) in the fraction 1 was compared with those in fraction 2, 3, and 4 indicating the easily mobilized of bleaching Ca in seawater and then deposited in sludge sediment.

Keywords
Sludge, Ca, Environmental Change, Risk Assessment, Gulf Coast

Topic
Biomass, Biofuel

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

Corresponding Author
Mumuh Mulyana

Institutions
Institut Bisnis dan Informatika Kesatuan

Abstract
Internet usage is growing rapidly. The internet has become an important part in business transactions. Millennial consumers, who have since been born "familiar" with the internet, have made ecommerce their favorite activity. Bukalapak as one of the ecommerce has many consumers from this millennial generation. The purpose of these research are: (1) To analysis the influence of web design to purchase decision. (2) To analysis reputation effect to purchase decision. (3) To analysis influence the ease of transaction to purchase decision. The respondents of research are 200 respondents who have transaction using e-commerce of Bukalapak. The research data processed using SEM AMOS. The results of these research are: (1) Web design has positif and significant effect to purchase decision with point t.stat 2,913 grater that 1,96 or point p 0,0004 less than 0,05. (2) Reputation takes positif and significant effect to purchase decision with point t.stat 1,960 equals from 1,96 or point p 0,050 equals from 0,05. (3) The easy transaction influences unsignificant negatively to the consumen decision with point t.stat -1,459 less then 1,96 or point p 0,145 grater than 0,05. Keywords: web design, reputation, easy transaction and purchase decision.

Keywords
web design, reputation, easy transaction and purchase decision

Topic
Contemporary issues in Digital Transformation

Link: https://ifory.id/abstract/mUGTwCW2dq7J

Corresponding Author
Nindya Farah Dwi Puspitasari

Institutions
(1)Universitas Terbuka (2)President University (3)President University

Abstract
The cost of equity is important to determine the return on investment. This research aims to examine the relationship between disclosure and political connection towards cost of equity. Cost of equity in this research is using Capital Asset Pricing Model (CAPM) approach. The sample used is from manufacture companies listed on Indonesia Stock Exchange from 2014-2017. The regression analysis results indicate that the disclosure have negative relationship toward cost of equity. Likewise, the political connection has negative relationship toward cost of equity. Moreover, the size also has negative relationship toward the cost of equity in the companies.

Keywords
cost of equity, disclosure, political connection, Capital Asset Pricing Model, size

Topic
Organizational and accounting system change

Link: https://ifory.id/abstract/UjDf6XkZG3EC

Corresponding Author
SUMARI SUMARI

Institutions
1)Chemistry Department, Universitas Negeri Malang, Indonesia
2)Chemistry Department, Universiti Malaya, Malaysia

Corresponding author: sumari.fmipa[at]um.ac.id

Abstract
Abstract. This study aimed to synthesize zeolite NaX and HX using silica sand as a raw material. Silica purification was carried out using leaching method as a function of immersion time followed by the sol gel method. Purified silica was characterized using X-RF, X-RD and SEM. Synthesis of zeolite-X was carried out using the hydrothermal method by reacting NaOH, Al(OH)3, SiO2 with a mole composition ratio of 58: 58: 134. Synthesized zeolites were characterized using XRD, FT-IR, XRF, SEM, and BET. The results showed that the optimal immersion time is 12 hours where the highest silica yield obtained is 95.1 wt% and after treated with sol gel method is obtained yield of 98 wt% silica. The synthesized zeolite Na-X and H-X had SiO2/Al2O3 molar ratios of 2.94 and 3.14. The existence of the peak of FTIR spectrum at wave numbers of 484, 538, 818, and 999 cm-1 indicates the presence of a specific zeolite functional group which shows the zeolite X framework is formed. The SEM test shows that octahedral crystals are formed which confirmed the zeolite X. The sinthesized zeolite of Na-X and H-X have surface areas respectively of 14.229 m2/g and H-X of 25.147 m2/g.

Keywords
silica, leaching method, sol gel method, hydrothermal method, synthesis of zeolite Na-X and H-X.

Topic
Geochemistry

Link: https://ifory.id/abstract/rMZ9RzCBubXF

Corresponding Author
Endang Ciptawati

Institutions
Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Jl. Semarang 5 Malang 65145, Indonesia

Corresponding author: fauziatul.fajaroh.fmipa[at]um.ac.id

Abstract
Zinc ferrite (ZnFe2O4) nanoparticle is one of the semiconductor materials that can be used as a catalyst in photodegradation of Malachite Green. In this research, the synthesis of ZnFe2O4 nanoparticle using coprecipitation method with microwave assistance and its effectiveness in photodegradation of Malachite Green was studied. ZnFe2O4 nanoparticles with NaOH concentration variations of 1 M, 1.5 M, and 2 M had been successfully synthesized based on the results of XRD characterization. The peaks produced are following JCPDS Card No. 22–1012. The analysis of BET method showed that the surface area of ZnFe2O4 nanoparticles with NaOH concentrations of 1 M, 1.5 M, and 2 M are 1030.268, 225.193, and 1974.447 m2/g respectively. In addition, photodegradation result of Malachite Green showed that ZnFe2O4 nanoparticles with NaOH concentration of 2 M was able to degrade 88.5% of malachite green in 90 minutes.

Keywords
coprecipitation method, photodegradation, zinc ferrite

Topic
Magnetic Methods

Link: https://ifory.id/abstract/GKaE6xUhADjw

Corresponding Author
Kusuma Wardhani Mas-udah

Institutions
1Mechanical Engineering Department, Faculty of Science and Technology, Universitas Nahdlatul Ulama Sunan Giri, Bojonegoro 62111, Indonesia
2Faculty of Science and Technology, University of Pesantren Tinggi Darul Ulum, PP. Darul Ulum, Jombang 61481, Indonesia
3Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, 65145, Indonesia


Corresponding author: sunaryono.taufiq.fmipa[at]um.ac.id

Abstract
In this research, we investigated the carbon phase in the corncob charcoal powder by heating treatment at a temperature of 400 °C for 5 hours. The samples were analyzed by using X-ray diffraction (XRD), energy dispersive X-ray (EDX), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR). To determine the degree of crystallinity and phase of the samples, the qualitative and quantitative data analyses were also performed. The results of data analysis indicated that the heating treatment was able to increase the crystallinity of the samples. The phase formation of the samples was the carbon graphite with 2H phase having a crystal system with R-3m space group. SEM data possessed the morphology of the samples, which still has lumps starting to form dimensions. Interestingly, the elemental analysis indicated the highest carbon element with the value of 67.99%. The molecular bonds in the charcoal include C-O and C=C positioned in a certain wave number.

Keywords
Corncob powder, carbon graphite, heating treatment, structure.

Topic
Computation and Other Related Field

Link: https://ifory.id/abstract/ePYH9qVWrkn2

Corresponding Author
Kusuma Wardhani Mas-udah

Institutions
1Faculty of Science and Technology, University of Pesantren Tinggi Darul Ulum, PP. Darul Ulum, Jombang 61481, Indonesia
2Mechanical Engineering Department, Faculty of Science and Technology, Universitas Nahdlatul Ulama Sunan Giri, Bojonegoro 62111, Indonesia
3Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, 65145, Indonesia


Corresponding author: ahmad.taufiq.fmipa[at]um.ac.id

Abstract
In this study, we investigated the formation of carbon prepared from corncob using coprecipitation method. The synthesis of corncob was carried out by weighing as much as 5 grams and adding 40 mL of HCl solution by stirring process at 750 rpm at room temperature. The result of the reaction was titrated by using 20 mL of NH4OH solution. The X-ray diffraction data analysis the formation of carbon-graphite nitrate was detected with the space group of R-3m space group. The scanning electron microscopy data presented that the samples had a morphology showing the presence of large aggregate particles. In addition, the elemental mapping analysis also captured the highest carbon element with the composition of 78.83%. The molecular bonds in the charcoal included C-O, C-H and C=C were detected in several wavenumber positions.

Keywords
Synthesis, structure, coprecipitation, corncob, aggregate

Topic
Computation and Other Related Field

Link: https://ifory.id/abstract/mYMQeKGfTWJ2

Corresponding Author
Thutug Rahardiant Primadi

Institutions
Universitas Negeri Malang

Abstract
Zinc ferrite (ZnFe2O4) nanoparticles is one of the semiconductor materials that can be used as a catalyst in photodegradation of Malachite Green. In this research, the synthesis of ZnFe2O4 nanoparticles was conducted by using coprecipitation method with microwave assistance, and then its effectivity in photodegradation of Malachite Green was studied. Synthesis of ZnFe2O4 nanoparticles with NaOH concentration variations of 1 M, 1.5 M, and 2 M had been successfully synthesized based on the results of XRD characterization. The peaks produced are following JCPDS Card No. 22–1012. The analysis of BET method showed that the surface area of ZnFe2O4 nanoparticles with NaOH concentrations of 1 M, 1.5 M, and 2 M are 1030.268 m2/g, 225.193 m2/g, and 1974.447 m2/g respectively. In addition, the photodegradation result of Malachite Green showed that ZnFe2O4 nanoparticles with NaOH concentration of 2 M was able to degrade 88.5% of malachite green in 90 minutes.

Keywords
coprecipitation method, photodegradation, zinc ferrite

Topic
Environmental Magnetism

Link: https://ifory.id/abstract/wy76AFDJ8CKX

Corresponding Author
MOKHAMAD FATONI

Institutions
Politeknik Negeri Jember

Abstract
Consumer perception on food quality is a key performance indicator for success in food industri development. Many factors influence consumer perception on food quality. The purpose of this study was to identify the attributes of food product and evaluate its performance to find out attributes based on consumer perception. This study uses marketing mix 4P namely Product (product), Price (prices), Place (where / location), Promotion (promotion). The respondent in this research was the consumer that bought and consumed soybean milk in Jember. The sampling technique used accidental sampling with a number of sample is 75 people, based on linier time function. The analysis of data used Importance–Performance Analysis. The result of this research showed that taste of product, flavour of product, and expired date of the product, and the price of product were the key atributes of soybean milk quality.

Keywords
Soybean Milk

Topic
Food Science and Technology

Link: https://ifory.id/abstract/ZTqWwznfVm4D

Corresponding Author
Daeng Achmad Suaidi

Institutions
1) Physics Department, Universitas Negeri Malang. Jl. Semarang No. 5 Sumbersari, Kec. Lowokwaru, Malang 65145, Indonesia.
2) Geophysics Laboratory. Physics Department, Universitas Negeri Malang. Jl. Semarang No. 5 Sumbersari, Kec. Lowokwaru, Malang 65145, Indonesia.
3) FMIPA Central Laboratory. Faculty of Mathematics and Science. Universitas Negeri Malang. Jl. Semarang No. 5 Sumbersari, Kec. Lowokwaru, Malang 65145, Indonesia.
4) Computational Physics Laboratory. Physics Department, Universitas Negeri Malang. Jl. Semarang No. 5 Sumbersari, Kec. Lowokwaru, Malang 65145, Indonesia.

*Corresponding author: daeng.achmad.fmipa[at]um.ac.id

Abstract
Nyusul

Keywords
Nyusul

Topic
Computation and Other Related Field

Link: https://ifory.id/abstract/M7vP68beKRjr

Corresponding Author
Atsnaita Yasrina

Institutions
1Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang
2Physics Education Study Program, Faculty of Teacher Training and Education, University of Lampung

Abstract
The presence of accretion around neutron stars is assumed to be one of the causes of the decreasing of the magnetic field around neutron stars. The solution of the magnetic field decreasing equation describes the dynamics of the magnetic field around rapidly rotating neutron star. The equation is derived from the rapidly rotating neutron star metric and the first and second of the relativistic Maxwell equations. The solution to Maxwells equations in neutron stars by assuming the stars magnetic field is dipolar. The solution relativistic magnetic field dynamics equation around an accreting and rapidly rotating neutron star in the ZAMO (Zero Angular Momentum Observers) frame has been formulated. This equation corresponds to the slowly rotating neutron star case as conducted by Rezolla.

Keywords
Magnetic field, neutron stars, rapidly, ZAMO, solution

Topic
Magnetic Theory

Link: https://ifory.id/abstract/9nRqt7EYL3yh

Corresponding Author
Agus Sundaryono

Institutions
1Graduate School of Science Education, University of Bengkulu, Bengkulu Indonesia
2 Undergraduate School of Chemistry Educations, University of Bengkulu, Bengkulu

Abstract
Kebiul seeds (Caesalpinia bonduc) are seeds from the Kebiul plant that are widely used by the serawai tribe in Bengkulu Indonesian as malaria medicine. The purpose of this study was to scientifically prove the efficacy of Kebiul seeds as an anti-malaria medicine preclinically in mice by measuring percent (%) chemosuppresion of crude extract of Kebiul seeds. Twenty-five mice were divided into 5 groups, K-, K +, P1, P2 and P3 each group were infected with Palsmodium berghei, three days after infection, the number of parasitemia that infected eritrocytes of mice was calculated, if the number of parasites had reached 20-30%, then mice were treated orally for 3 days according to their group. Group (K-) treated with olive oil, group (K +) with chloroquine, and groups P1, P2 and P3 were treated with crude extract of Kebiul seeds at a dose of 0.028 g / kgbw; 0.056 g / kgbw and 0.084g / kgbw. The average number of parasitemia developments is calculated from the first day of treatment to up to 7 days. The average percent (%) chemosuppresion in the administration of crude extract Kebiul seeds at a dose of 0.028 g / kgbw was 51.21% higher than the administration of chloroquine (50.77%). Based on this result, Kebiul seed extract at a dose of 0.028 g / kgbw can be developed as a new traditional medicine as a substitute for anti-malaria medicine chloroquine, because it has been reported in several areas including Bengkulu that malaria is resistant to chloroquine.

Keywords
Biji Kebiul (Caesalpinia bonduc); Anti malaria; Klorokuin; Traditional medicine; Palsmodium berghei

Topic
Chemistry

Link: https://ifory.id/abstract/xwJaYVvz7FtU

Corresponding Author
Agus Sundaryono

Institutions
1Graduate School of Science Education, University of Bengkulu, Bengkulu Indonesia
2 Undergraduate School of Chemistry Educations, University of Bengkulu, Bengkulu

Abstract
The purpose of this study is to develop a learning module based on laboratory research on Kebiul seed extract test to increase platelet count in mice. Twenty-five mice were grouped into five, group K- , mice were given sesame oil orally, K +, mice were given aspirin, and group P1, P2 and P3, mice were given Kebiul seed extract at a dose of 0.028 g / kgbw, 0.056 g / kgbw and 0.084g / kgbw. This laboratory research is then packaged as a supplementary module that was developed using the 4D model. The quality of the module can be identified by validation of expert judgment. The ability to think critically is measured using indicators focusing questions, considering whether the source is reliable or not, the indicators conclude by induction thinking and considering the results of induction, and identifying assumptions. Kebiul seeds with a dose of 0.056 g / kg bw are the most effective way to increase platelet counts in mice and have the potential to be used as a medicine to increase platelet count in DHF patients. Based on the results of expert validation, media experts gave a value of 91.9%, material experts amounted to 86.8% and module experts amounted to 86.4%, the modules were categorized as very feasible to use, student responses to the modules amounted to 85.80% (very good and effective) and feasible to use.

Keywords
Biji Kebiul (Caesalpinia bonduc); DHF; Critical Thinking; Traditional medicine; Learning module

Topic
Chemistry Education

Link: https://ifory.id/abstract/2RCxTQPmAfK8

Corresponding Author
Euis Nursaadah

Institutions
Universitas Bengkulu
Universitas Sultan Ageng Tirtayasa

Abstract
Chemistry learning needs an assessment to evaluate ways of students- thinking. One of them is a critical thinking skill test. The purpose of this study is designing domain-specific critical thinking skill on thermochemistry concept. Content Validity Ratio (CVR) and Confirmatory Factor Analysis (CFA) were evaluated to analysis the validity of the instrument. Cronbach-s Alpha were evaluated to analysis the reliability. Descriptive method was used as a research design. The participants of this study are 185 senior high school students in Cilegon-Banten-Indonesia. Data are obtained from expertise judgment, empirical test, and interview. The results showed that the quality of instruments of domain-specific critical thinking skills on thermochemistry concept based on CVR and CFA is 0,723 (good criteria). Cronbach-s Alpha test showed 0,652 (high criteria). It can be concluded that instrument is feasible to measure students- critical thinking skills on thermochemistry domain knowledge.

Keywords
Domain-Specific Critical Thinking Skills, Thermochemistry

Topic
Chemistry Education

Link: https://ifory.id/abstract/qRm6JhTPMjCY

Corresponding Author
Hardin Hardin

Institutions
a) Law Study Program, Faculty of Law, Universitas Muhammadiyah Buton, Baubau, Indonesia

*darojatandra[at]gmail.com

Abstract
Economic development as part of national development, is one of the efforts to create a just and prosperous peoples welfare based on the Pancasila and the 1945 Constitution of the Republic of Indonesia The purpose of this study was to determine the form of legal protection for customers in credit agreements with land rights collateral at Bank Syariah Mandiri Baubau Branch. This study was conducted at the Bank Syariah Mandiri Baubau Branch. Samples from this study were 13 informants. Sampling of customers will be done by simple random sampling, The form of legal protection for customers (mudharib) is: (a) the Bank Syariah Mandiri Baubau Branch Office will store the mudharib file into the hasanah room and secure it in a safe monitored through closed circuit television (cctv) and alarmed, where the room is anti-fire and flood and theft; (b) There is a security guarantee from the officer, with a 24 hour security system, so that the mudharib file will be protected from the danger of theft; (c) There is legal protection for mudharib in accordance with Article 38 paragraph (1) of the Law of the Republic of Indonesia Number 21 of 2008 concerning Sharia Banking; (d) There are opportunities for mudharib to learn the terms of the financing agreement, so that the mudharib do not feel cheated.

Keywords
Legal Protection, Customers, Credit Agreements, Collaterates, Land Rights

Topic
Law

Link: https://ifory.id/abstract/xekHj2fMLDwF

Corresponding Author
Ema Andekaputri Ema

Institutions
Institut Agama Islam Negeri Bengkulu (IAIN Bengkulu)

Abstract
Abstract. This research is quantitative research which aimed to know the effect of students- perception of mathematics on their learning outcomes. This study was carried out in SMP Muhammadiyah Terpadu in Bengkulu city from 22nd January to 22nd February 2019. The samples were taken using a simple random sampling method. Twenty-four students of Class VIII participated in this research. The collecting data used in this study was a questionnaire and learning outcomes tests. The questionnaire was used to determine students perceptions of mathematics while the learning achievement test was taken from the results of the students Final Semester Exams. Then, the data were processed using SPSS software. Based on the results of data analysis, it can be concluded that the correlation coefficient (r) was more than alpha (0.080> 0.05). Hence, H0 was rejected which means that there was a positive correlation between students perceptions of mathematics with mathematics learning outcomes.

Keywords
students- perception, learning outcomes

Topic
Mathematics Education

Link: https://ifory.id/abstract/v6VPLrWbXNQF

Corresponding Author
Teddy Alfra Siagian

Institutions
1) Program Studi Pendidikan Matematika, Universitas Bengkulu, Jl. WR Supratman, Kota Bengkulu 38122, Indonesia
*teddysiagian[at]unib.ac.id
2) Program Studi Pendidikan Matematika, Universitas Negeri Medan, Jl. Willem Iskandar Pasar V, Kota Medan, 20221, Indonesia

Abstract
The purposes of this study were: 1) Developed problem-based on learning tools who meet the criteria are valid, pratical, and effective; 2) Described the improvement of mathematical problem solving skills of student using learning device based on problem based learning developed . Research development of 4-D model was done in two stages: 1) the development of learning devices; and 2) testing devices. The subject in this study were students of class X SMAN 1 Pematangsiantar, while the objects is the PBL developed, mathematical problem solving skill students. The results were obtained: 1) The learning devices based on PBL that developed have valid criteria, practical and effective; 2) There is an increased ability of mathematical problem solving skill of student using learning device based PBL developed.

Keywords
PBL devices development, mathematical problem solving ability

Topic
Mathematics Education

Link: https://ifory.id/abstract/24YGMyfwZxCt

Corresponding Author
Nur Aliyyah Irsal

Institutions
Universitas Bengkulu

Abstract
The critical thinking, that involve the reflective and evaluative process, has a significant role in students- everyday life. Therefore a teacher candidate need to has a good critical thinking to be able to foster their students thinking critically through learning mathematics. As an initial step to reinforce the critical thinking of teachers candidate, we need to know the state of their thinking. For this purpose, we conducted a descriptive study to investigate the critical thinking of mathematics education students in geometry. We designed a writen task in two types: true/false questions to investigate the critical tinking in their geometric comprehension and making decission, and problem solving questions to check their using of critical thinking in solving problems. The result we get showed the lack of mathematics education program students critical thinking in the geometry context. This conditions was due to their misconception of geometry context, their less paying attention to the whole situation and condition, and their less open analysis of situations. It implied that the geometry course need to be improved in using medias and strategies that involved more challenging problems and using more open analysis and logical thought in comprehend the concepts.

Keywords
mathematics education, critical thinking, geometry

Topic
Mathematics Education

Link: https://ifory.id/abstract/mLUH9apnce84

Corresponding Author
Bambang Siswoyo

Institutions
MAKSOEM UNIVERSITY

Abstract
Abstract—The prediction of a companys bankruptcy, especially the prediction of bankruptcy of the banking industry in Indonesia, is very important. With this bankruptcy information, Bank Indonesia (BI) as the central bank, is able to make policies and develop a sound banking system. This research has been developed to build a model that is able to predict and evaluate the bankruptcy of the banking industry. The dataset used is the published financial ratio, for the algorithm used is the twoclass boosted decision tree. Machine learning learning with a dataset of input-output models can be implemented between financial ratio variables against bankruptcy. Overall, the model used is able to train input- output relationship data and system behavior properly. Overall, it is able to train and model input-output relationship behavior well, with AUC result of 95% and 95% accuracy, Precision 95% and 100% recall.

Keywords
Keywords—Machine learning, bankruptcy, twoclass decision tree

Topic
Other Related Topics

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