Indonesia Conference Directory

Corresponding Author
Daenulhay -

Institutions
Muhammadiyah University of Tangerang

Abstract
In the age of hyper-competition, internal strengthening such as strengthening corporate culture or improving service quality (servqual) must be carried out continuously, otherwise, you may go out from the business. Anticipating those situation, Pt.. krakatau daya listrik which is providing energy supply, services, and distributors of gas, carried out a cultural transformation, which was originally professional, harmony and integrity into execution, newness, efficient, reliable, grateful, and integrity (energi). The board of directors is developing an cultural socialization program, and for this, it is necessary to rank the cultural dimension of energi, then the cultural socialization program is carried out continuously in accordance with the budget, human resources, and company facilities. using the analytic hierarchy process from Thomas L. Saaty, which is start with the decomposition process, comparative judgement, and logic consistency, produces a priority ranking of corporate culture consecutively are integrity, reliability, execution, grateful, efficient, and newness.

Keywords
Keywords: Hyper-Competition, Corporate Corporation, Service Quality, Combine Cycle, AHP, Decomposition, Comparative Judgement, Logic Consistency.

Topic
Strategic Management

Link: https://ifory.id/abstract/QXbqHL972EGP

Corresponding Author
WONG PIT YIN

Institutions
a) Universiti Teknikal Malaysia Melaka
b) Center for Languanges and Human Development

Abstract
Abstract: The service quality in Halal hotel sector is a key determination toward successful market. The current trend of enhancing good quality management in Halal hotel affect the goal of competitive advantage between Halal hotel. The conceptual model of service quality is needed to understand the provenance of service quality and potential gaps in quality. The study aims to help the Halal hotel to measure the service quality by using the SERVQUAL model. The study consists of five independents variables which are tangible, empathy, reliability, assurance and responsiveness while the dependent variable is customer satisfaction. The survey data was collected from 150 respondents were analysed using Statistical Package from the Social Science (SPSS 23.0). This research uses the cluster sampling technique as probability sampling. The findings of this research contribute to the Syariah compliance hoteliers as well as the government over Malaysia tourism industry.

Keywords
Halal hotel, SERVQUAL model, customer satisfaction

Topic
Marketing

Link: https://ifory.id/abstract/azep6YTjk7Df

Corresponding Author
I Nyoman Kardana Kardana

Institutions
Fakultas Sastra, Universitas Warmadewa

Abstract
Abstrak Perkembangan pariwisata Bali telah membawa dampak yang besar terhadap perilaku masyarakat Bali. Wisatawan domestik dan asing yang berkunjung dan tinggal menetap di Bali telah mempengaruhi warna kehidupan masyarakat Bali. Di samping itu, kemajuan teknologi informasi juga memberikan pengaruh yang besar terhadap pola hidup dan pola pikir masyarakat Bali. Misalnya, penghargaan masyarakat Bali terhadap bahasa Bali sebagai salah satu unsur budaya Bali semakin lama semakin menurun. Masyarakat lebih senang dan bangga untuk bisa menguasai dan menggunakan bahasa asing dari pada bahasa Bali dalam kehidupan sehari-hari. Alasannya, bahwa menguasai bahasa asing jauh lebih menjanjikan dari pada bahasa Bali. Menguasai bahasa asing lebih membuka peluang untuk mampu bersaing dalam dunia pekerjaan di sektor pariwisata. Kenyataan yang telah mengubah perilaku masyarakat Bali tersebut perlu mendapat perhatian berbagai pihak, khususnya dunia pendidikan. Bahasa Bali sebagai media komunikasi masyarakat Bali dalam kaitannya dengan aktifitas adat, agama, dan budaya Bali harus dijaga kedudukan dan fungsinya. Sesungguhnya, bahasa Bali tidak saja sebagai alat komunikasi, tetapi dalam bahasa Bali juga terbungkus pesan dan nilai-nilai moral yang berhubungan dengan kearifan lokal (local genius) masyarakat Bali. Dengan demikian, ketidakmampuan sebagaian generasi muda Bali memahami dan menggunakan bahasa Bali telah menjadi salah satu faktor penyebab terjadinya kemerosotan moral dan perilaku generasi muda Bali. Sehubungan dengan itu, untuk menghasilkan generasi penerus yang handal dan memiliki perilaku (soft skill) yang baik, pendidikan di Bali tidk hanya menekankan pada kemampuan akademik siswa tetapi juga memberikan pengetahuan perilaku (soft skill) yang baik kepada siswa sebagai generasi muda Bali dan memotivasi generasi muda untuk menyukai dan memahami bahasa Bali. Jadi, penguasaan bahasa Bali (sebagai bahasa lokal) dan pendidikan karakter sangat perlu ditingkatkan secara berkelanjutan untuk menghasilkan generasi muda yang berdaya saing tinggi dalam era globalisasi dewasa ini. Karakter itu sendiri merupakan suatu kepribadian yang ditinjau dari titik tolak etis atau moral, seperti kejujuran seseorang, yang biasanya mempunyai kaitan dengan sifat-sifat relative tetap (Gulo, 1987).. Salah satu upaya yang memungkinkan dilakukan dalam kaitannya dengan pendidikan karakter adalah pembelajaran “Masatwa Bahasa Bali”. Dengan sistem pembelajaran ini siswa akan termotivasi untuk menyenangi dan memahami bahasa Bali dan siswa juga mengetahui nilai-nilai moral yang terkandung dalam setiap alur cerita dan karakter dari masing-masing tokoh yang ada dalam cerita tersebut. Cerita /satwa bahasa Bali banyak mengandung nilai-nilai yang berhubungan dengan kearifan lokal Bali.

Keywords
Kata Kunci :Bahasa Bali, nilai moral, pendidikan karakter, kearifan lokal.

Topic
Kearifan Lokal

Link: https://ifory.id/abstract/ju9VgkwJ6vHh

Corresponding Author
I GUSTI AGUNG AYU GITA PRITAYANTI DINAR

Institutions
Universitas Warmadewa

Abstract
Ekowisata berimplikasi positif dalam meningkatkan perekonomian masyarakat setempat, untuk memahami fenomena alam, budaya dan memberikan dukungan terhadap pelestarian alam dan budaya itu sendiri sehingga format pariwisata Bali yang kental dengan pariwisata budaya tidak akan pernah pudar. Karakter kebudayaan dan warisan budaya Bali yang mencakup simbol, tanda, bentuk ekspresi seni tulisan, bahasa, gaya hidup, sistem ritual, pengetahuan tradisional dan mitologi yang diwariskan oleh pendahulu masyarakat Bali menjadikan daya tarik tersendiri bagi dunia pariwisata. Perubahan dan pergeseran cara hidup, budaya, sistem ritual dalam masyarakat tidak dapat terhindarkan, hal ini merupakan cerminan budaya yang fleksibel dan ramah terhadap masuknya budaya lain dan perkembangan teknologi global. Pergeseran ini bukanlah sebuah problema jika karakter dan identitas budaya Bali idealnya selalu mencerminkan warisan budaya pendahulunya. Ketika warisan budaya berwujud (tangible heritages) dapat dipugar kembali pada saat terjadi kerusakan karena seleksi alam, bagaimanakah dengan tata kelola pelestarian warisan budaya tidak berwujud yang telah bercampur dan mengalami perubahan bahkan terlupakan akibat percampuran berbagai budaya di dunia yang sedikit demi sedikit dikhawatirkan dapat menggantikan warisan budaya intangable Bali? Rumusan masalah dalam penelitian ini: (i) Bagaimanakah kajian filosofis mengenai hakikat pelestarian warisan budaya intangible? (ii) Bagaimanakah konsep tata kelola warisan budaya intangable Bali sehingga dapat dilestarikan dengan dinamika perkembangan budaya global? Penelitian ini menggunakan metode penelitian kualitatif, dengan mengembangkan validasi data melalui dialog, wawancara khusus dengan memperhatikan fenomena sosial di masyarakat, dengan peneliti sebagai instrumen pokok. Teknik pengumpulan data yang relevan dalam penelitian ini yaitu dengan cara: (i) pengamatan (observasi lapangan) dan (ii) studi dokumen. Teori yang digunakan dalam mengkaji permasalahan dalam penelitian ini yaitu teori korelasi ruang, manusia dan kebudayaan. Melalui penelitian ini dapat ditentukan hakikat dari pelestarian warisan budaya intangable Bali dan konsep tata kelola warisan budaya intangable Bali dengan adanya dinamika perkembangan budaya global dengan mengkaji secara komprehensif melalui obyeknya, proses terbentuknya dan kemanfaatan untuk masyarakat setempat, nasional dan internasional. Diperlukan konsep tata kelola yang saling mendukung dan saling menentukan sehingga tercapai pelestarian sistem budaya yang ideal dan berkelanjutan di Bali. Tolak ukur pelestarian warisan budaya tidak hanya terfokus pada wujud warisan budaya itu sendiri namun dengan memperhatikan berbagai faktor disekitar warisan budaya secara mendalam, terstruktur dan sistematis.

Keywords
tata kelola, pelestarian, intangable heritages

Topic
Kearifan Lokal

Link: https://ifory.id/abstract/Mj2e7BCbuvhm

Corresponding Author
Mayun Wirajaya

Institutions
WARMADEWA UNIVERSITY

Abstract
The PKM (community service) activity was carried out at the "Wana Sari Merta" Livestock Farmer Group in Pancasari Village, Sukasada Sub-District, Buleleng Regency, Bali with the title "PKM of Increasing the Added Value of Waste in Rabbit Farmers Group in Pancasari-Buleleng". Pancasari Village is a producer of horticultural products, in which organic fertilizer is mostly utilized and made by chicken feces. This opportunity could actually be used by rabbit farmers to supply organic fertilizer made from rabbits- waste, namely rabbits- feces and urine. Problems which were faced by the Wana Sari Merta Group were 1).the rabbits- waste has not been processed optimaly and intensively into fertilizer, 2).the group has not have building to collect and process the solid and liquid waste for fermentation and storing process, 3).the product has not been packaged well, 4).high disease rate that leaded to rabbits- death, 5).the lack of feed during dry season. The solutions for those problems were 1).technical training and guidance in making both of solid and liquid organic fertilizers, 2). technical counseling and guidance to build certain place to process both of solid and liquid waste into fertilizers, 3).technical counseling and guidance to package both of solid and liquid organic fertilizers, 4).technical counseling and guiding of disease prevention, and 5).technical counseling and guiding in finding alternative feed. The aims of this activity were to encourage the knowledge and skill of the farmers in cultivating rabbit and using the rabbits- waste as organic fertilizer to subtitute inorganic fertilizer. Besides, both of the solid and liquid rabbits- waste could be used as organic fertilizer for plants just like the chickens- waste. The use of technology in rabbits- waste processing would give high added value for rabbit farmers. The target outputs of this activity were the villagers could be independent in processing the waste of rabbit. From this activity, the output target to be achieved is that the partner group can independently utilize the solid and liquid rabbit waste to become "Solid Organic Fertilizer" (SOF) and "Liquid Organic Fertilizer" (LOF) so as to increase partner group income.

Keywords
livestock farmer groups, rabbits, rabbits waste, solid organic fertilizer, and liquid organic fertilizer

Topic
Ekowisata

Link: https://ifory.id/abstract/EDzNatg78PFb

Corresponding Author
M Rivandi Fadli

Institutions
Electrical Power Engineering
School of Electrical Engineering and Informatics
Bandung Institute of Technology
Bandung, Indonesia

Abstract
Brushless DC (BLDC) motors have the advantage in high reliability compared with conventional DC motors because of the absent of the brushes. BLDC requires switching with the help of power electronic components which is 6 pulse inverter. One of the methods is field orientation control (FOC) by controlling id and iq. By controlling id and iq independently, Maximum Torque Per Ampere ratio (MPTA) to minimize the current can be achieved so that it can improve motor efficiency. In this paper, the FOC method applied in 120kW BLDC motor is investigated. From simulation result, when the torque is higher, then response of the motor is faster to achieve nominal rotational speed. Otherwise, lower torque that applied to the load cause higher ripple. The speed of BLDC motor could be control using control loop from torque control. In this paper, high torque ripple caused by difficulties of PI control setting, high load (100 Nm), and trapezoidal back-EMF of the BLDC.

Keywords
BLDC, FOC, Torque Control, Speed Control

Topic
Power Electronics and Its Applications

Link: https://ifory.id/abstract/Y6XmU7zvpTkG

Corresponding Author
Sulistyo Sulistyo

Institutions
Mechanical Engineering Department Diponegoro University, Tembalang Semarang
NCSTT, ITB Bandung

Abstract
The development of photovoltaics has shown the maturity of technology. The application can already be used as a source of electrical energy and is an environmentally friendly source of electrical energy. The use of PV technology in Indonesia has developed well for the generation of electricity for companies or household units as an alternative energy source. Currently, Indonesia has begun to develop electric car transportation by using batteries, so that it was need inverter equipment which change a direct current to the alternating current. This paper discusses the comparison of power consumtion 125 watts pump by using alternating current (AC) and direct current (DC) based on solar energy using photovoltaic (PV). The type PV cell uses a 100-watt peak solar cell type silicon mounted on a portable basis and paralel connected. The PV is installed at Semarang region which connected by battery. The type battery is 100 AH, 12 V. The battery was connected to motor pump of 125 watts. There are two motors type which has specification as DC motor and AC motor. The DC motor should be connected by DC-DC converter before DC motor pump to increase the requirement voltage of motor pump while AC motor should be provided by inverter DC to AC. The pump was connected by piping system which suction pipe use a diamter of 32 mm and discharge pipe of 20 mm. The total head for both experiment are 4 m. The speed of motor was measured as in motor specification. The operating of PV was at 08.00 am – 16.00 pm. The result of the power consumtion of the DC motor was more effiency tha by using AC motor. The operation of the battery using DC motor is about two times longer than AC motor.

Keywords
Solar Energy, Photovoltaics, Pump

Topic
Electric System, Drives, Motors, Machinery

Link: https://ifory.id/abstract/JtAEc9U2xFBu

Corresponding Author
Aloysius Rusli

Institutions
Jurusan Fisika, FTIS, Universitas Katolik Parahyangan, Bandung 40141, Indonesia

Abstract
Sebagai suatu alternatif tambahan bagi jenis sumber energi terbarukan, makalah ilmiah tahun 2012 dalam jurnal Complexity, oleh Eric Shinn dkk, dari University of Illinois at Urbana-Champaign, dirujuk sebagai gagasan yang menarik, walaupun masih ada sejumlah masalah teknis yang perlu diatasi. Konsep yang digunakan, yang tampaknya agak diilhami oleh penelitian Henry Moseley (1887-1915), fisikawan Inggris yang mengukuhkan konsep “nomor atom”, adalah mengkonversi energi kinetik 5,6 MeV pancaran partikel alfa dari isotop radioaktif sintetis Americium-242, menjadi energi potensial listrik. Hal itu dilakukan dengan melewatkan partikel alfa itu pada susunan seri kapasitor-nano, yang terbuat dari tumpukan 5 ribu lembaran monoatomik grafena, dengan tebal total 2,5 milimeter, yang diberi medan listrik 1 GV/m untuk menghentikan partikel alfa tersebut. Hasilnya adalah bahwa partikel alfa itu mengambil elektron dari grafena, dan menjadi gas atom Helium yang netral. Kekurangan elektron yang terjadi dalam rangkaian listrik berkapasitor-nano itu, lalu dapat menimbulkan arus listrik. Hasil perhitungannya meramalkan dapat dihasilkannya daya listrik 22 mW jika Americiumnya berjumlah 1 curie (= 37 gigabecquerel). Dalam makalah ini hendak ditunjukkan bagaimana gagasan ini dapat dipahami dengan beberapa konsep Fisika Dasar, sehingga dapat dimanfaatkan sebagai ilustrasi yang mengaitkan hasil penelitian dengan materi kuliah Fisika Dasar. Hal ini dipandang bermanfaat untuk lebih mendekatkan dunia penelitian fisika dengan dunia pendidikan fisika dasar, dan membina semangat kreativitas dan sikap memecahkan masalah, kekhasan manusia dalam menangani kecerdasan buatan robotik.

Keywords
energi terbarukan, radioaktivitas, sel listrik

Topic
Pendidikan Fisika

Link: https://ifory.id/abstract/j2mV8CZyATcz

Corresponding Author
Moedji Raharto Raharto

Institutions
1 Program Studi Astronomi, Institut Teknologi Bandung, Gd. CAS Lt.6 Jl. Ganesha 10 Bandung 40132, Indonesia
2 Program Studi Ilmu Falak, Universitas Islam Negeri Sunan Ampel, Jl. A. Yani 117 Surabaya 60237, Indonesia

Abstract
Gambaran umum hubungan aspek fisis, astronomi dan kalendar Gregorian di presentasikan dalam makalah ini. Makalah ini bertujuan mencari data yang konsisten antara realitas periode rata – rata orbit Bumi mengelilingi Matahari dan periode rata – rata orbit Bumi mengelilingi Matahari yang diturunkan dari kalendar Matahari.

Keywords
kalendar Matahari, siklus sinods, siklus tropis

Topic
Pendidikan Fisika

Link: https://ifory.id/abstract/CPyepgu4XWr7

Corresponding Author
Firman Bagja Juangsa

Institutions
ITB

Abstract
The rapid development of renewable energy generation and electric vehicle utilization has effect on increasing demand of battery performance as the energy storage, including lithium-ion and well-developed and commercially available type of battery. In order to increase energy density, silicon is employed as anode electrodes due to its high specific capacity. However, silicon electrode has a limited cycle due to expansion and shrinkage during operation cycle, which leads to the mechanical failure. Nanostructured silicon has been reported to enhance the life cycle with various combination with other materials, including polymer. In this paper, silicon nanoparticles (SiNPs) are produced plasma chemical vapor deposition with controllable particle size. SiNPs with different particle size were produced while maintaining the crystallinity and narrow size distribution. Nanocomposite of SiNPs and polymer were produced by solution processing at low temperature, enabling a low cost of fabrication and preserves the unique properties of SiNPs. Material characterization on nanocomposite provides a potential application of SiNPs as anode material in li-ion batteries.

Keywords
li-ion battery, silicon, nanoparticle, nanocomposite

Topic
Battery Technology and Management System

Link: https://ifory.id/abstract/dKXe8zYjtHhx

Corresponding Author
M Munadi

Institutions
Universitas Diponegoro

Abstract
Land transport has contributed to air pollution that occurs. This forced the car manufacturers to improve the quality of their products in order to pass the exhaust emissions standards. In addition to exhaust emissions, the limited source of vehicle fuel energy is the reason some researchers develop electric cars. This article conveys the results of research on prototyping an electric city car for two passengers with wheel hub motor type configuration as our research pilot project related to electric cars. The data acquisition aids made are equipped with a LabVIEW-based human-machine interface that makes it easier for researchers to monitor the consumption of electric cars in real-time. Based on the design process, manufacture, until testing, the value of drag coefficient is 0.42; testing for curb-weight is 510 kg; maximum speed is 75.3 km/hour; the maximum power is 3.03 kW at 602 rpm wheel speed; and the maximum torque is 50.8 Nm at a wheel speed of 516 rpm. For the state of charge, this prototype of an electric city car is capable of traveling up to 42.4 km from 100% to 20% SOC.

Keywords
electric city car, wheel hub motor, human machine interface

Topic
EV Body, Chassis, and Platform

Link: https://ifory.id/abstract/JQwAzuG2YNDp

Corresponding Author
Marham Sitorus

Institutions
a) Department of Chemistry, Universitas Negeri Medan, Medan 20221, Indonesia
*marham.sitorus[at]gmail.com

Abstract
Malondialdehyde (MDA) is a metabolite resulting from lipid peroxidation by free radicals that can be formed when hydroxyl free radicals such as Reactive Oxygen Species (ROS) react with fatty acid components of the cell membrane so that a chain reaction is known as fat peroxidation. The fat peroxidation will break the chain of fatty acids into various toxic compounds and cause damage to the cell membrane. Thus MDA is an indicator of the presence of free radicals in the body. In this research, the Conjugated Linoleic Acid (CLA) antioxidant test was synthesized from castor oil in vivo against Wistar rats. Wistar rats were exposed to free radicals through cigarette smoke for 2 hours per day for 14 days. Mice were given an antioxidant intake of CLA with a concentration of 200, 400, 600,800,1000 mg / body weight every day with three repetitions. The same thing is done with intake of Ascorbic Acid (Vitamin C) and &

Keywords
MDA; CLA; Free Radicals and Inhibition

Topic
Biochemistry, Biotechnology and Pharmacy

Link: https://ifory.id/abstract/tdnJ7E64PKuv

Corresponding Author
Suhayat Minardi

Institutions
Program Studi Fisika, Universitas Mataram, Jl. Majapahit No. 62 Mataram, Indonesia

Abstract
Deformasi permukaan adalah peristiwa yang alami terjadi di permukaan bumi ini. Deformasi tersebut dapat berupa penurunan (subsidence) ataupun kenaikan (uplift) permukaan tanah. Dalam penelitian ini akan diterapkan metode gayaberat mikro antar waktu untuk memonitor deformasi permukaan yang terjadi di Kabupaten Lombok Tengah dan Kabupaten Lombok Timur. Metode gayaberat mikro antar waktu adalah pengukuran gayaberat secara berulang di titik yang sama dengan selang waktu tertentu, Besaran yang diukur berupa perubahan nilai percepatan gravitasi dan skala mikroGal. Pengukuran dilakukan pada bulan Agustus 2016, April 2018, dan Juni 2019. Nilai perubahan percepatan gravitasi yang terukur merupakan hasil penjumlahan dari perubahan yang diakibatkan oleh sumber di bawah permukaan dan di permukaan. Pemisahan kedua nilai tersebut dilakukan dengan menggunakan filter striping, yang mempertimbangkan perbandingan densitas, ketebalan, dan kedalaman dari lapisan di pemukaan dan di bawah permukaan. Hasil analisis penampang melintang arah utara-selatan menunjukkan perubahan ketinggian sebesar (-8,4 sampai -4,9) cm untuk periode Agustus 2016 hingga April 2018, (7,4 sampai 9,4) cm untuk periode April 2018 hingga Juni 2019, dan (-0,9 sampai 3,8) cm untuk periode Agustus 2016 hingga Juni 2019. Sedangkan penampang melintang arah timur-barat perubahan ketinggian yang terjadi sebesar (-10,7 sampai -7,1) cm untuk periode Agustus 2016 hingga April 2018, (4,2 sampai 8,6) cm untuk periode April 2018 hingga Juni 2019, dan (-3,7 sampai -0,1) cm untuk periode Agustus 2016 hingga Juni 2019. Penurunan muka tanah terjadi selama perioda Agustus 2016 sampai April 2018 dan kenaikan permukaan tanah terjadi selama perioda April 2018 sampai Juni 2019. Penurunan muka tanah ini terjadi akibat kompaksi alamiah dan aktivitas tektonik minor (gempa-gempa kecil yang tidak dirasakan) sedangkan kenaikan muka tanah yang terjadi diakibatkan oleh aktivitar tektonik mayor, berupa Gempa Lombok pada bulan Juli hingga September 2019

Keywords
aktivitas tektonik, deformasi permukaan, fiter striping, gempa Lombok, kompaksi alamiah

Topic
Fisika Bumi

Link: https://ifory.id/abstract/gcdKyjN86DFh

Corresponding Author
Estiyanti Ekawati

Institutions
Program Studi Teknik Fisika, Fakultas Teknologi Industri, Institut Teknologi Bandung

Abstract
Dalam rumah bersumber energi mandiri, dan tidak terhubung dengan jaringan listrik PLN, media penyimpanan energi yang digunakan adalah baterai yang merupakan pemasok arus listrik searah (Direct Current, DC). Namun, perangkat sistem kelistrikan yang umum ditersedia di Indonesia adalah sistem kelistrikan bolak-balik (Alternating Current, AC). Penggunaan perangkat kelistrikan AC pada sumber daya DC ini akan menimbulkan persoalan rugi daya yang tinggi akibat konversi mode listrik berulang melalui inverter (DC-AC) maupun adaptor (AC-DC). Untuk itu, dibangun prototipe sistem kelistrikan DC skala rumah tangga. Kinerja prototipe ini dibandingkan dengan sistem kelistrikan AC, dalam hal konsumsi daya, durasi nyala, serta biaya investasi. Pembangunan prototipe didahului dengan studi beban listrik yang sesuai dengan sistem kelistrikan DC. Perancangan prototipe sistem meliputi pemilihan tegangan jaringan, perancangan kelistrikan, perancangan kabel listrik, perancangan konverter daya DC-DC, dan modifikasi beban listrik. Hasil pengujian prototipe menunjukkan bahwa rata-rata konsumsi daya sistem kelistrikan DC lebih rendah 40,52% hingga 85,37% dari sistem kelistrikan AC. Hasil simulasi pemakaian beban listrik terjadwal dengan kapasitas baterai 50 Ah, 24 V untuk sistem kelistrikan DC menunjukkan durasi nyala dua kali lebih lama dibandingkan sistem kelistrikan AC. Dari segi investasi jaringan listrik, sistem kelistrikan DC memiliki biaya investasi yang lebih rendah sebesar 26,12% dari sistem kelistrikan AC.

Keywords
Sistem Kelistrikan, DC, AC, Efisiensi

Topic
Fisika Instrumentasi

Link: https://ifory.id/abstract/pfDc6RV4nFXG

Corresponding Author
Estiyanti Ekawati

Institutions
Program Studi Teknik Fisika, Fakultas Teknologi Industri, Institut Teknologi Bandung

Abstract
Dalam sebuah sistem kelistrikan DC diperlukan suatu konverter daya DC-DC. Konverter DC-DC digunakan untuk mencatu tegangan pada nilai tetap yang sesuai dengan kebutuhan setiap beban listrik. Terdapat dua metode konversi pada konverter DC-DC yaitu linier dan pensaklaran. Berdasarkan prinsip kerjanya, konverter DC-DC tipe pensaklaran memiliki efisiensi konversi daya yang lebih tinggi dari tipe linier. Pada penelitian ini, dilakukan pembuatan konverter DC-DC tipe pensaklaran menggunakan LM2678-5 dan konverter DC-DC tipe linier menggunakan LM7805 (linier standar) dan LM2940 (linier low drop). Konverter-konverter tersebut memiliki tegangan luaran 5 V. Untuk melakukan perbandingan efisiensi konversi daya, ketiga konverter DC-DC tersebut digunakan untuk mencatu beban listrik berupa telepon genggam dalam sistem kelistrikan DC. Hasil pengujian menunjukkan bahwa efisiensi konversi daya rata-rata pada konverter DC-DC tipe pensaklaran adalah 79%, tipe linier standar 18%, tipe linier low drop 19%. Keunggulan efisiensi konversi daya membuat konverter DC-DC dengan metode pensaklaran sangat disarankan pada sistem kelistrikan DC.

Keywords
Konverter DC-DC, Efisiensi Konversi Daya, Linier, Pensaklaran

Topic
Fisika Instrumentasi

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

Corresponding Author
Nirwan Syarif

Institutions
Department of Chemistry Universitas Sriwijaya, Indralaya, Indonesia
National Center for Sustainable Transporatation Tech.
Bandung, Indonesia

Research Center of Excellence for Fuel Cell and Hydrogen
Universitas Sriwijaya
Palembang, Indonesia

Dept. Recausticizing
PT. OKI Pulp & Paper
Kayu Agung, Indonesia

Abstract
The research of the development kerosene soot carbon particles and its application as electrode for lithium ion battery has been done. The carbon was prepared from kerosene by using thermal plasma pyrolisis and characterized by Boehm titration in order to determine the carbon functional group, point zero charge for surface charge and X-ray diffraction for crystalography. Carbon was mixed with polianilin to form anode and mixed with lithium, iron salts and phosphate to form LiFePO4 as cathode. Both electrodes were fabricated into lithium ion battery with Li2SO4 as electrolyte. The performance of battery was measured with the variaton of electrolyte concentration i e., 0.1 M, 0.5 M, and 1 M. Boehm titration result showed that the carbon has acid functional groups greater than base functional group as 6.90 mgeq. 4.80 of point zero charge pH was in acid condition. The crystalography of carbon as anode presented in diffractogram showed 2θ = 23.68 and 42.33 of diffraction peaks and indicated graphite crystal in the carbon. CV measurement reveal that the oxidation occurred at the peak of anode current, i e., 0.015 A for 0.3 V whereas the reduction occured at the -0.3 V and 0.007 A. A Galvanostatic charge discharge measurenment showed that The highest capacity is obtained in 0.52 mAh/g with a voltage of 0.71 Volts, which is the 500th cycle. The lowest capacity is obtained in only 0.15 mAh/g of 0.2 Volts, that is in cycle 1st

Keywords
electrode, kerosene, boehm titration, pH, pzc, voltammogram, diffractogram, LIB, galvanostatic

Topic
Battery Technology and Management System

Link: https://ifory.id/abstract/fAyzUhKcVL8v

Corresponding Author
Puguh Budi Prakoso

Institutions
ULM

Abstract
Advances in computer, communication and information technologies enable to store, process and transfer large data very quickly. This technology-based automation system also makes it possible to carry out processes or procedures by minimizing human involvement to avoid the risk of human errors. What is more, these processes and procedures can be performed now in real-time. Intelligent Transportation System (ITS) is an application of computing, communication and information technology to manage transportation effectively. ITS architecture involves sensor and detector technology, big database and data processing, real-time transport analysis/modelling/computing, AI, control systems, automation, navigation as well as data transfer and communication systems. ITS which is designed with a minimum errors and is able to make predictions can be used for preventive measures and safety improvement. The applications of ITS to enhance transportation safety, for instance public travel safety, increasing safety for vulnerable road users, smart intersections, traffic surveillance, incident detection, emergency notifications, etc. This presentation discusses the recent ITS implementations in enhancing transportation safety, some evidence of the effectiveness of ITS applications in various countries, ITS applications in Indonesia as well as the future challenges of ITS in following developments and trends in future mobility, especially in facing the industrial era 4.0.

Keywords
ITS, transportation safety, future mobility, industry 4.0

Topic
Transportation Safety

Link: https://ifory.id/abstract/Zr9JKY6gejAH

Corresponding Author
Stephan Brandl

Institutions
AVL

Abstract
Content of this session will be how engineering service suppliers can support Indonesia economy and Indonesian OEMs to boost local EV development. In the beginning most important components for future EVs and required charging solutions will be highlighted. Additionally a brief overview of potential component developments and integration of off-the-shelf systems as well as production and cost engineering will be presented.

Keywords
Engineering, Local EV development, OEM

Topic
Electric System, Drives, Motors, Machinery

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

Corresponding Author
Syadila Refiasto

Institutions
ITB

Abstract
In this paper, magnetic flux (distribution and direction) modelling and analysis of brushless DC (BLDC) motor that output power is 120 kW using JMAG software is investigated. Before performing magnetic flux analysis, the motor parameters is verified by using JMAG-Express. After verifying the design, the magnetic flux distribution and direction is analyzed. The purposed of this research is investigating the operation area of magnetization-demagnetization process in the stator and rotor core of BLDC motor.

Keywords
Magnetic flux analysis, modelling, JMAG, Brushless DC Motor (BLDC).

Topic
Electric System, Drives, Motors, Machinery

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

Corresponding Author
Aron Meko Mbete

Institutions
Warmadewa University

Abstract
Research for the sake of linguistic progress remains very important. On the other hand, the development of applied linguistics adds quality to the linguistic axiological value in answering linguistic problems in Indonesia. Negative attitude towards: (1) Indonesian as the national and official language; (2) embarrassed (no longer skilled) in local languages as a mother tongue; and (3) more proud of foreign languages (English), is a matter that disturbs national identity. Therefore, the lingual-cultural sovereignty of Indonesian in its own country should be upheld. The "Spirit" of Sumpah Pemuda is a breath of national integrity that must be guaranteed its sustainability. Recovery of a positive attitude, loyalty for national languages supported by regional languages, and controlled enriched foreign languages, become a necessity. The grade of substantial-instrumental values of language, Indonesian is the soul and media of the nation, regional languages are the soul and media of tribes, while foreign languages are only media of communication between nations. Thus, the quality of the use of Indonesian and the competence of a variety of standard languages become: (1) common core strengths; (2) the guardian of Indonesian nature, and (3) creative use resources. Therefore, the real effort to save is very important. Strategies for developing the quality of Indonesian, preserving local languages, and using foreign languages for controlled enrichment should be designed and implemented.

Keywords
applied linguistics, linguistics ideology, identity pillars, nation-state

Topic
Language

Link: https://ifory.id/abstract/4QvqnRTHZcY6

Corresponding Author
Stefan Arman

Institutions
CV. Laksana

Abstract
Bus transportation is the largest mass transportation in Indonesia. But, that-s contrary to the low safety aspect, especially in rollover accident which is most dangerous accident and caused the most fatalities. Based on the number of rollover accident in Indonesia from 2015 – 2018, an average of 10 - 15 people died, and 30 people injury from this accident. So, that makes Laksana is commitment to the safety aspect by developing the rollover computational simulation and rollover actual testing. The bus rollover test, refer to UN ECE-R66 regulation which has been used in Europe and most countries in the world. This regulation also has not even been implemented in Indonesia, so Laksana is a pioneer bus industry in adopting this regulation for evaluating our bus design, increasing the safety aspect, and expanding the export market. The type of UN ECE-R66 testing that we used in this study are full bus rollover simulation using Finite Element Analysis, and the section bus rollover test (as the validation from FEA simulation). FEA simulation for rollover crash, used a 12 m coach bus design with full condition of 35 passengers. Then, the bus is rotated at a slope of 36 degrees and tilted at height of 800 mm from the ground. The results of Laksana bus simulation are successful with side frame and roof component didn-t touch the residual space, during the rollover process. This simulation results have also been validated by evaluating the energy balance graph and compared to the energy calculation from UN ECE-R66 regulation. The energy difference between calculation and FEA simulation is 9.007 %. Laksana also using the another validation method using section bus rollover test, with the front section model of the coach bus that had been previously simulated. Before testing, Laksana evaluated the mass and rollover angle at the maximum CoG and prepared a FEA simulation of bus front section for additional validation. The results of the actual bus section testing are successful, and better than the bus front section FEA simulation.

Keywords
Laksana, rollover test, safety aspect, UN ECE R-66, FEA simulation, section test

Topic
EV Body, Chassis, and Platform

Link: https://ifory.id/abstract/87GfVLHenXxm

Corresponding Author
DPPJ UMMagelang

Institutions
1) Faculty of Health Sciences Universitas Muhammadiyah Magelang
2) Faculty of Techology Universitas Muhammadiyah Magelang

email: henisetyowati[at]ummgl.ac.id

Abstract
Work fatigue is a phenomenon that is often experienced by workers. If left untreated, ongoing work fatigue can reduce worker productivity. Informal workers are the type of workers whose numbers dominate in Indonesia, one of which is workers in micro and small industries which involve many women. Women who work have a dual role, as workers, wives, and mothers of their children. If women workers experience continuous work fatigue, they are not able to play a role in other tasks. This study aims to identify the work fatigue of women workers in the informal sector as a basis for developing interventions to overcome work fatigue. This research is a descriptive study with a sample of 38 people who were taken purposively, a measuring tool to determine fatigue with the Fatigue Measurement Feeling Questionnaire (KAUPK2) and Nordic Body Map. Results: 11 respondents (28.9%) experienced fatigue. With the Nordic Body map, 39% revealed pain in the right shoulder, 36.8% pain in the right hand, and 34.2% pain in the left hand. Suggestion: interventions need to be developed to overcome fatigue so that work productivity is more optimal.

Keywords
fatigue, informal sector workers

Topic
Health Science

Link: https://ifory.id/abstract/vmWEXfn92dRt

Corresponding Author
Hidayati Wijaya

Institutions
Postgraduate Physics Education Study Program UNIMED

Abstract
Abstract. The purpose of this article is to find out the integration of physics concepts in Javanese culture. Physics is very closely related to daily life. In the daily life of Javanese culture there are many concepts related to physics. The environment of traditional Javanese society always believes in ancestral messages and customs about how to behave and apply to nature. Various problem solving continues to be associated with science and technology for the growth, development and welfare of human life. In this universe, everything can be explained with the help of science, especially physics. One distinctive feature of Javanese cultures local wisdom is batik making which applies the concept of capillary physics.

Keywords
-

Topic
Applied Basic Science and Multidisciplinary

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

Corresponding Author
Marhaposan Situmorang

Institutions
1,2Department of Physics, Faculty of Mathematics and Natural Sciences, University of Sumatera Utara, Medan

1Email Addres: marhaposan[at]usu.ac.id

Abstract
Output power of Photovoltaic Generator (PVG) in a power system was tracked using duty cycle perturbation pulse applied into Maximum Power Point Tracking (MPPT) DC to DC boost converter. Perturbation pulse was controlled by Perturb and Observe (P&O) algorithm which is written in Arduino Uno microcontroller. Power system consist of PVG connected directly with MPPT DC to DC boost converter and then with DC to AC inverter and selected load is 20 W bulb. PVG efficiency was determined by the ratio between the PVG output electric power and the amount sunshine irradiation power received on the surface of PVG. MPPT efficiency was calculated base on output power of PVG work as an input power of MPPT and both input and output power of MPPT was measured using voltage sensor and ACS 712 current sensor. Voltage and current measurements was carried out in online system using Parallax Data Acquisition (PLX-DAQ) software and then voltage, current and power was tabulated in excell table. The graph of voltage, current and power was plotted as a function of time and shows the occurrence of power tracking of MPPT to extract maximum power from PVG after duty cycle of perturbation was applied. The performance of power system was determined by multiplying efficiency of PVG, MPPT and Inverter which gives the performance value around 93percent of PVG efficiency.

Keywords
Photovoltaic, Converter, Inverter

Topic
Electrical, Chemical and Electronic Engineering

Link: https://ifory.id/abstract/f2bDEARNJ67v

Corresponding Author
Tumiur Gultom

Institutions
Lecturer of Biology Department, Mathematics and Natural Science Faculty, Universitas Negeri Medan Medan, North Sumatera, Indonesia
Graduated of Biology Department, Mathematics and Natural Science Faculty , Universitas Negeri Medan, Medan, North Sumatera, Indonesia
Researcher ,Research Center for Vegetables Crops,Tongkoh, Berastagi , North Sumatera, Indonesia

Abstract
This study aimed to determine the growth and production of Doulu Cultivar Garlic of MV2 generation. This research was conducted in March-July 2019. The seeds used in this study came from MV1 Garlic which given Gamma Rays at dose of 6 Gy (G3), 8 Gy (G4) dan 10 Gy (G5). Planting seeds in carried out in a research center for vegetables crops, Tongkoh, Berastagi, North Sumatera. The design used in this research is Non Factorial Randomized Block Design with 4 replications. This research uses 4 levels of treatment in accordance with the source of the seeds the dose 0 Gy (G0), 6 Gy (G3), 8 Gy (G4) dan 10 Gy (G5). The seeds came from 67 tubers consisting of 340 cloves. The parameters observed are age of growth, height of plant, number of leaves, number of stomata, diameter of stem, weight of cloves, diameter of cloves, and number of cloves. Data from this study were analysed with Anova and Least Significant Different test (LSD test). The results showed that the growth and production of plants significant of effect based on seed by radiation doses that are on height of plants, number of leaves, diameter of stem, weight of bulbs, diameter of bulbs, weight of cloves, diameter of cloves, structure of bulbs, and shape of bulbs of cultivar Doulu garlic but no significant on age of growth, number of stomata, and number of cloves.

Keywords
garlic, gamma ray radiation, MV2 generation

Topic
Biochemistry, Biotechnology and Pharmacy

Link: https://ifory.id/abstract/eRuHC6DqGTfQ

Corresponding Author
La Ode Topo Jers

Institutions
(a) Halu Oleo University
(b) Halu Oleo University
(c) Halu Oleo University
(d) Halu Oleo University
(e) Halu Oleo University
(f) Halu Oleo University
(g) Halu Oleo University

Abstract
This research aimed to explain the soliti plant in Muna people-s traditional medication, referring to disease and ethnomedicine theories, namely the spiritual aspect in human health system. This aspect can be an integral component of Ethnomedicine practice (Anderson, 1986). The method employed in this research was ethnographic method with qualitative approach. Data collection was conducted through participatory observation and in-depth interview with informants related to Muna people-s traditional medication practice. Meanwhile, technique of analyzing data employed in this research was descriptive qualitative analysis. The result of research showed that soliti plant is a traditional medication known by Muna people as an efficacious solution to modern medical treatment attempt. The representation of spiritual support and natural resource that has provided drug sources is viewed as a fact of traditional medical healing to the sick people. The relations created in traditional social group can be defined as an empirical fact of a belief system concerning how the ritual can be practiced, the medication can be enlivened, and the natural resource can be preserved.

Keywords
Traditional Medication, Muna People, Soliti

Topic
Culture

Link: https://ifory.id/abstract/RcxzCyh3pXLT

Corresponding Author
Sahur saerudin

Institutions
(a) Halu OleoUniversity
(b) Halu OleoUniversity

Abstract
The object of this study is to obtain an overall picture and deep understanding of Wolio language maintenance at Buton society in Baubau city, South East Sulawesi. The observations of the research of preservation of language focus on domain of usage at five domains: (i) family and neighborhood, (ii) work environment (office), (iii) informal meeting (marriage), (iv) school environment (elementary school), and (v) worship (mosque). The research approach used qualitative approach adopting the methods of ethnography and Spradleys models. The Data were collected through participant observation, interviews, recording, and document study. The result of the data analysis and interpretation indicate that the level of Wolio language density was (58.51%), the category of less maintained. Based on these findings, it can be concluded that Wolio language will be heading to extinction if no efforts are made with the language inheritance.

Keywords
maintenance, Wolio language, density, and domain

Topic
Language

Link: https://ifory.id/abstract/E6nTWqmV9dhk

Corresponding Author
Muhammad Rizalul Wahid

Institutions
ITB

Abstract
Switched reluctance motor (SRM) as a driving force has a very important role in an electric vehicle because it is able to produce a large torque about 12.3 Nm and the speed is about 9600 rpm. There is no model that represents the real SRM motor. Model identification is done by using the Black Box method in the Matlab System Identification Toolbox (SIT). The speed output of the SRM motor is measured externally by a sensor based on the hall effect principle, which gives a high pulse of 4.27 volts every it detects an existing magnet at the motor rotation. The speed sensor of motor is simulated and validated using the Intelligent Schematic Input System (ISIS) software on the Proteus before it is implemented into the SRM motor. The results are obtained in the form of transfer function system with order 1 and order 2. The order 1 has a match with the real data of 93.65% and the order 2 has a greater match value of 93.7%.

Keywords
Electric Vehicles, Black Box Method, System identification, Switched reluctance motor (SRM),

Topic
Electric System, Drives, Motors, Machinery

Link: https://ifory.id/abstract/fhXV73DgYvFA

Corresponding Author
Narasimha Balijepalli

Institutions
Institute for Transport Studies, University of Leeds, UK

Abstract
This paper reviews the electric scooter (motorcycle) use in three countries viz., China, Taiwan and Vietnam and identifies the prospects for Indonesia. This review is based on published information in scientific journals and the prospects projected for Indonesia are based on a collective learning experience from other countries rather than as a result of the implementation of policy. Towards the end of twentieth century, several Chinese cities have implemented regulatory measures such as suspending issuance of new licences, banning the entry of motorcycles/scooters to city centres, capping/auctioning of licence plates. These regulatory measures created favourable conditions for the promotion of electric scooters in Chinee cities. Weak enforcement of standards also helped the electric scooter market further which resulted in a boom in their numbers from a mere 56000 in 1998 to 21million in just 10 years. However the policy at regional level is inconsistent which makes the future of electric scooter uncertain in China. Taiwan made a conscious effort persistently over a number of decades to promote electric scooters firstly to sustain the oil shock and then to improve the air quality in their cities. Instead of adopting a regulatory approach, they relied on subsidies as a strategy to promote e-scooters which was quite successful as the sales went up by 8.79 times (779% increase) from 1500 in 1998 to 13000 vehicles in year 2000. However, inconsistent quality and inadequate maintenance quickly dampened e-scooter sales that led to the suspension of the subsidy programme. In 2009 Taiwan revived the promotion again by addressing three key issues identified – cruise range/long charging time, durability of battery/high running cost and nationwide recharging network. Vietnam has a high motorcycle population (>90% of total number of vehicles) and can potentially benefit from adopting e-scooters to reduce the air pollution. A stated preference experiment found that consumers are highly sensitive to fuel prices though they discount the fuel cost savings at much higher rates (up to 40%) due to the uncertainty involved. Superior technology of e-scooters is valued at VND 10 million which implies that if better technology is delivered at cheaper prices, the adoption rate will significantly improve. Finally consumers are willing to pay VND 1.64 million to avoid a sales tax of one million. This equates to reducing the recharge time by 3.5h or increasing the range by 90km. Thus incentivising the consumers is likely to help boosting the e-scooter sales by a significant margin. Learning from the experience, Indonesia may develop an appropriate strategy to launch their e-scooter programme which is balanced between incentivising the consumers/manufacturers/ charging station operators and regulatory measures such as phasing out polluting internal combustion engines by raising the emission standards. Significant adoption rate in Indonesia will improve the

Keywords
Electric scooter, suitable development, air quality

Topic
EV Socio-Economical Impact

Link: https://ifory.id/abstract/QuL9bTAVCe6h

Corresponding Author
mariani halim89

Institutions
(a) Halu Oleo University
(b) junior High School 22 South Konawe
(c) Halu Oleo University

Abstract
This research was set out to investigate the effect utilizing web blog as a teaching media on students- writing competence. Thirty-one fourth semester students of English Literature study program in the Cultural Science Faculty, Halu Oleo University who took Creative Writing subject in the academic year 2015/2016 participated in the research. Data were obtained from students- results of pre- and post-test, as well as pre-post in-depth interview which was conducted to find out students- perception towards the use of web blogs in their learning. The research analyzed both quantitative and qualitative data. Two research questions were posed: (1) Is there any significant effect of utilizing web blog on the students- competence in writing narrative essay? (2) How do students- perceptions of using blogs influence their experiences in their English writing?. The researcher runs a paired sample t-test with 2 tailed t-test using the SPSS 16 to test proposed hypothesis. To reveal students- perception, descriptive data were transformed into words. Analysis of the data obtained resulted in the followings: pre-test score (M=76.38; SD = 8.77), post-test score (M=86.29; SD=7.78), Df= 30, t-tabel = 1,697 and t-test = 10.686. These results indicated a significant different on students- writing competence before and after treatment. It can therefore be concluded that utilizing web blog as media for teaching writing is effective not only in improving student-s writing competence, but also in creating positive learning environment.

Keywords
Web Blog, Writing Competence, Feedback, Pre-Post-test, in-Depth Interview.

Topic
Education

Link: https://ifory.id/abstract/uNqxvL2zQV3R