Indonesia Conference Directory

Corresponding Author
Agnieszka Zakrzewska-Bielawska

Institutions
(a) Lodz University of Technology, Poland
agnieszka.zakrzewska-bielawska[at]p.lodz.pl
(b) AGH University of Science and Technology, Poland

Abstract
The relational strategy is based on the cooperation of enterprises, and thus it is determined by specific attributes resulting from the specificity of established, maintained and developed inter-organizational relations, their forms and systems. Whether the companys relational strategy will be characterized by a multiplicity of relations with various partners, whether it will be long-term relations, based on trust, whether the relations will be formal and contractual, largely affects the results obtained from the relational strategy implementation. It should be noted that the implementation of a relational strategy can bring not only benefits to the company but also involves negative effects, risks, and costs. Therefore, the aim of the article is to recognize the effects of implementing a relational strategy from the perspective of its key attributes, which include: diversity, durability, originality, and formalization. The research was carried out on a representative sample of 400 enterprises operating in Poland and on international markets, which is representative of the company-s size. The research tool was a standardized questionnaire, which was filled in by the owners or representatives of the top management. The research results show that the more the companys relational strategy is characterized by diversity and durability, the stronger the positive effects of its implementation. In turn, the originality and the degree of formalization of relations as the attributes of the relational strategy have no effect on the results obtained from its implementation.

Keywords
relational strategy, attributes, interorganizational relations, performance

Topic
Management Strategic

Link: https://ifory.id/abstract/zjLeYKJDaxd6

Corresponding Author
Lina Anatan

Institutions
Faculty of Economics, Universitas Kristen Maranatha

Abstract
In the age of knowledge-based economy, knowledge has become an important factor to improve organizational performance. In this era, competition is no longer based on cost alone, however moved on knowledge-based product and services. Higher education as source of knowledge plays important role in disseminating knowledge not only to enhance organizational performance but also to develop knowledge society as a whole. This paper aim to review studies on knowledge sharing among academics especially in the digital economy. Firstly, this paper will discuss the concept and definition of knowledge sharing. The discussion continue with the issue of knowledge sharing in higher education institutions and its impact on organizational performance. Lastly, this paper deal with how the digital economics impact on knowledge sharing activities in higher education institutions.

Keywords
knowledge transfer, higher education institutions, organizational performance

Topic
Management Strategic

Link: https://ifory.id/abstract/UpgQ2fKFEM7V

Corresponding Author
Dini Fitriani

Institutions
Department of Geophysics
FMIPA Unpad
Jl. Raya Bandung-Sumedang Km 21
Sumedang 45363

Abstract
Cikijing River is a river that flow in the Rancaekek area, West Java. A number of activities occur around the Cikijing River, such as textile industry and domestic activities. These various activities could affect condition of the river and surrounding environment. One of the impacts that can occur is the decreasing quality of the river due to the pollutants that might be produced by these activities. Cikijing River is also used as a source of irrigation of the paddy fields, so that the paddy field could be also be affected. The presence of pollutants in river sediments and soil over a long period of time could change their physical properties including magnetic properties. We have examined the magnetic properties of surface sediments of Cikijing River and top soil of paddy fields around the river considering that magnetic properties could represent environmental conditions. The results show that sampels of sediment river have magnetic susceptibility in range of 356.2-456.3 (× 10-8) m3kg-1. Meanwhile, samples of topsoil in paddy field are 94.1-347.1 (× 10-8) m3kg-1. The χFD (%) of sediment and topsoil have a range of 1.47%-4.84% and 0.27-4.68%, respectively. The value of χFD (%) < 4% is generally found on samples contaminated by pollutant. Statistical analysis between ??? and the χFD (%) has negative correlation indicates that the change of magnetic properties of the samples influenced by anthropogenic sources. The image of magnetic grains with mesh 230 in size have hedral and spherules shape. Based on energy dispersive spectroscopy analysis the magnetic grains contain Fe, O and Ti. Heavy metal contents such as Pb, Hg, Zn, Cd and Cu are also found in sediment and soil.

Keywords
sediment, soil, magnetic susceptibility, anthropogenic, Cikijing River

Topic
Environmental Magnetism

Link: https://ifory.id/abstract/XBgV7DUWJTbu

Corresponding Author
Lutfi Maulida

Institutions
1) Department of Physics, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia
2) Advance Material and Mineral Laboratory, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia

Abstract
The identification of rock magnetic properties by magnetic susceptibility has been done on rock weathering of rip rap in Lahor Dam, Malang regency. The aim of this study was to determine the magnetic properties of weathered and unweathered rocks of basaltic and basaltic andesite by measuring magnetic susceptibility and analysis of magnetic domain distribution. Samples were tested using Bartington Magnetic Susceptibility Meter (MS2B) to determine the value of magnetic susceptibility. The result of susceptibility test shows that low frequency susceptibility (χlf) of the outer part of potentially weathered rock has values ranged from (314-1,068) x 10-8m3kg-1 for basalt with average 601.63 x 10-8m3kg-1 , and the inner part (296-790) x 10-8m3kg-1 , with average 546.28 x 10-8m3kg-1. The average of dependent frequency susceptibility (χfd) for this rock is about 0.703%. Meanwhile for the outer part of basaltic andesite has low frequency susceptibility (χlf) ranged from (343-2,744) x 10-8m3kg-1, with average 1,175.57 x 10-8m3kg-1 , and the inner part ranged from (341-2,681) x 10-6m3kg-1 , with average 808.96 x 10-8m3kg-1. The average of dependent frequency susceptibility (χfd) for this rock is about 0.715%. So it can be concluded that the magnetic susceptibility of the outer part of rock is higher than that of the inner part. There is no differences of magnetic domain distribution between inner and outer part of rock during weathering process and all the samples have a tendency to multidomain magnetic grains (MD).

Keywords
weathering; magnetic susceptibility

Topic
Rock Magnetism

Link: https://ifory.id/abstract/aDKcAj6EJXvp

Corresponding Author
Eva Khikmiatul Maula

Institutions
(a)Department of Physics, Faculty of Mathematics and Natural Science, State University of Malang. Jl. Semarang 5 Malang, 65145 Indonesia
*nandang.mufti.fmipa[at]um.ac.id
(b)Centre of Advanced Materials for Renewable Energy, Universitas Negeri Malang, Jl. Semarang 5, Malang 65145, Indonesia
(c)Department of Chemical Engineering, Petronas Technology University. Bandar Seri Iskandar, 32610, Perak, Malaysia

Abstract
The Effect of Thickness of Fe3O4 Film on the Nature of Photoelectrochemical (PEC) from Fabricated Fe3O4/ZnO Film Using Spin Coating Method Nandang Mufti(1,2)*, Eva Khikmiatul Maula(1), Yudyanto(1,2), Chusnana Insjaf Yogihati(1,2), Suriati Sufian(3), M. Tommy Hasan Abadi(1), Siti Maryam(1) 1Department of Physics, Faculty of Mathematics and Natural Science, State University of Malang. Jl. Semarang 5 Malang, 65145 Indonesia 2Centre of Advanced Materials for Renewable Energy, Universitas Negeri Malang, Jl. Semarang 5, Malang 65145, Indonesia 3Department of Chemical Engineering, Petronas Technology University. Bandar Seri Iskandar, 32610, Perak, Malaysia *Corresponding Author : nandang.mufti.fmipa@um.ac.id ABSTRACT: Photoelectrochemical (PEC) water splitting converts solar energy into electrical energy, and stored it in the form of hydrogen and oxygen molecules. In PEC system, semiconductor electrodes play an important role in the conversion of solar energy; ZnO is one of the semiconductor materials with excellent electrical properties which is suitable for an electrodes. However, wide band gap of ZnO about 3.37 eV only can be utilized for photon energy in the UV region of about 4%. Henceforth, a combination of ZnO with Fe3O4 is predicted to have advantages such as being able to absorb visible light, low toxicity, and easy achievement, therefore photoactivation can be improved. In this present study, Fe3O4/ZnO films were fabricated using spin coating and doctor blade methods. The XRD result shows that the crystal structure of ZnO and Fe3O4 are hexagonal and cubic spinel, respectively. while the thickness of Fe3O4, ZnO, and Fe3O4/ZnO can be seen in Cross-sectional SEM test. Fe3O4 layer can increase PEC efficiency, where the efficiency value produced in Fe3O4/ZnO film is 0.15%, greater than the single layer of ZnO film is 0.035% and a single layer of Fe3O4 film is 0.038%. Keywords: Photoelectrochemical, Crystal Structure, Efficiency

Keywords
Photoelectrochemical, Crystal Structure, Efficiency

Topic
Magnetic Methods

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

Corresponding Author
Denny Arianto

Institutions
(a) Departement of Physics, Faculty of mathemathic Natural Science, Institut Teknologi Bandung
(b) Research Center for Bioscience and Biotechnology
Institut Teknologi Bandung, Jl Ganesa no. 10, Bandung 40132, Indonesia
Corresponding Author : *krijal[at]fi.itb.ac.id, **miftah[at]fi.itb.ac.id

Abstract
Rotary forcespinning (RFS) is a method to produce fiber. This method is very efficient, low cost and very produtive compared to other method. It has high rate production than electrospinnig. This study focused on the synthesis of mixture polyvinyl pyrolidone (PVP) and Polyethylene glycol (PEG) fibers using RFS with varying rotating speed. The Fiber produced using RFS and solutions of PVP/PEG in distilled water and ethanol with concentrations 14 wt.%. The RFS process was performed at different rotational speed starting from 6.000, 8.000, 10.000, 12.000 and 14.000 rpm. The morphology and average diameter of PVP/PEG fibers was investigated using optical microscopy. Beaded fibers were at rotating speed 6.000 dan 8.000. The results showed that diameter of fibers decreased as rotating speed of RFS increased. The diameter of the PVP/PEG fibers was uniform

Keywords
rotary forcespinning, polyvinyl pyrolidone , Polyethylene glycol, fiber

Topic
Nano Science and Technology

Link: https://ifory.id/abstract/auZk6dAJYctq

Corresponding Author
Wahyu Aji Eko Prabowo

Institutions
(1) Informatics Engineering Department, Faculty of Computer Science, Universitas Dian Nuswantoro Semarang, 50131, Indonesia

(2) Catalysis and Reaction Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung, 40132, Indonesia

(3)Engineering Physics Department, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung, 40132, Indonesia

(4)Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Bandung, 40132, Indonesia

(*) Corresponding author: prabowo[at]dsn.dinus.ac.id

Abstract
Molybdenum disulfide (MoS2) and nickel promoted MoS2 are increasingly used as catalyst in hydrotreating process, which involve adsorption, dissociation and formation of molecular hydrogen. This study aims at investigating the adsorption, dissociation and formation of hydrogen molecular over MoS2 and Ni promoted MoS2 (NiMoS) surface by using first-principles density functional theory (DFT). By using CI-NEB method, the activation energies of H2 dissociation and H2 formation are calculated. The most stable adsorption site is found in MoS2 surface. From the evaluation of H–H formation energy barrier on catalyst surface, NiMoS shows better reactivity than MoS2.

Keywords
Hydrogen, adsorption, dissociation, MoS2, NiMoS, density functional study

Topic
Theoretical and Analysis in Materials

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

Corresponding Author
Sukarno Sukarno

Institutions
Jurusan Pendidikan Fisika, fakultas Tarbiyah dan Keguruan Universitas Islam negeri Sulthan Thaha Saifuddin Jambi

Abstract
This study aims to improve pedagogical abilities of prospective Physics teacher students through a learning model. The Explaining-Doing (EXDO) learning model is one of the artistic models in developing student pedagogical abilities. The implementation of the EXDO model for prospective students of physics shows that pedagogical abilities have increased. The intended pedagogical ability includes the ability of prospective physics students in determining Learning Indicators, Learning Objectives, Learning Materials, Learning Methods, Learning Media, Learning Steps, Determining Learning Resources, Scientific Content, and Assessment of Learning Outcomes. Based on the data obtained, it can be seen that the highest normalized N-gain value is obtained by the component "subject matter", namely 93.16% and "determining learning resources" which is 91.74%. The lowest N-gain is achieved by the component of "learning outcomes assessment" which is equal to 71.79%. This shows that students pedagogical abilities in developing "subject matter" and "determining learning resources" and are difficult in "learning outcomes assessment". However, when referring to the normalized N-gain average value of 85.47%, it means that there has been an increase in pedagogical abilities of prospective physics teacher students during the implementation of the EXDO learning model.

Keywords
EXDO model, pedagogy, Physic prospective teacher

Topic
Physics Education

Link: https://ifory.id/abstract/eV4Phvj3zMtT

Corresponding Author
Amelia Fadhillah

Institutions
Department of Physics Education, Universitas Pendidikan Indonesia, Bandung, Jawa Barat, Indonesia

Abstract
Armchair Graphene Nanoribbon (AGNR) is one of the Graphene Nanoribbon (GNR)-s type which can be role as a semiconductor or conductor depends on number of atoms that arrange its width . The unique of the electrical properties of AGNR attracted researchers to make graphene as material of semiconductor based device. Because of its tiny width, graphene is very good for application on devices with tunneling electron based. In this research, the author models the behavior of tunneling current on a bilayer armchair graphene nanoribbon-based p-n junction diode using Airy function. The modeling-s result show that the tunneling current has relation with bias voltage, temperature, and characteristic of BAGNR. The tunneling current is directly proportional to the forward-bias, the width of the BAGNR, and the intrinsic electric field. It is inversely proportional to the temperature. Its value on BAGNR is bigger than on MAGNR due to the effect of interlayer coupling γ_0 and γ_1 to the energi gap. The tunneling current using the Airy function method and the WKB method have the same tendency and slight different value.

Keywords
BAGNR, p-n junction diode, tunneling current, Airy function

Topic
Physics

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

Corresponding Author
Burhanuddin -

Institutions
Jurusan Manajemen, Fakultas Ekonomi, Universitas Mulawarman

Abstract
Seperti dipahami, kajian tentang pembangunan (ekonomi) selama ini didominasi oleh pandangan yang sangat materialistik sehingga proses dan tujuan pembangunan amat reduksionis (Yustika dan Andrianto, 2008:6). Sistem ekonomi yang cenderung materialistik tersebut menimbulkan ketimpangan pendapatan dan ketidakmerataan kesejahteraan. Kasus ketimpangan pendapatan juga masih terus terjadi di Indonesia, data BPS mencatat terjadinya peningkatan angka koefisien gini di seluruh provinsi pada tahun 2009 dan tahun 2010. Angka koefisien gini Indonesia sendiri menurut BPS memburuk dari 0,37 pada 2009 menjadi 0,38 pada 2010. Islam sebagai rahmatan lil alamin sebenarnya telah menyediakan instrumen dalam menangani masalah ekonomi manusia. Zakat sebagai salah satu kewajiban umat Islam dapat berperan dalam penangan masalah kesejahteraan dan ketimpangan pendapatan. PIRAC (Public Interest Research and Advocacy Center) dalam rilis hasil surveinya mengatakan potensi dana zakat di Indonesia, yang populasinya sekitar 87 persen muslim, sangat besar hingga mencapai 9,09 triliun rupiah pada 2007. Namun pada kenyataannya Indonesia belum mampu mengoptimalkan potensi zakat bagi kesejahteraan umat. Pengelolaan zakat yang menempatkan kejujuran dan amanah sebagai asas utama pelaksanaanya menimbulkan kekhawatiran di kalangan para muzakki. Kepercayaan muzakki kepada lembaga amil zakat masih rendah yang mana terdapat indikasi kekhawatiran dari masyarakat bahwa zakat yang diserahkan tidak sampai kepada yang berhak menerimanya (Mustahik) (Herdianto, 2011:114). Selain masalah kepercayaan, jumlah cabang yang terbatas dari (LAZ) baik pemerintah dan non pemerintah membuat pengumulan dan penyaluran zakat belum maksimal. Penduduk miskin yang umumnya terdapat di pedesaan kurang mendapatkan akses untuk menerima zakat, infaq, dan shadaqah (ZIS) dari LAZ Dalam tulisan ini penulis bermaksud menggabungkan potensi zakat, infak dan shadaqah (ZIS) dengan potensi pengelolaan berbasis masjid. Potensi ZIS yang sangat besar meningat Indonesia dengan jumlah umat muslim terbesar di dunia akan teroptimalisasi dengan menjadikan masjid sebagai center of excellence bagi pengembangan pendidikan, ekonomi, dan kesehatan. Pengelolaan dana ZIS oleh pengurus dan remaja masjid diyakini dapat lebih mudah diakses oleh masyarakat miskin (mustahik) yang terdapat dipelosk-pelosok desa. Bagi muzakki sendiri, dana zakat yang mereka setorkan akan dapat langsung dilihat dan dirasakan manfaatnya. Selain pengelolaan yang melibatkan secara aktif pemuda dan remaja masjid dengan tujuan edukasi bagi generasi muda. Alur dana dari muzakki sampai kepada mustahik dapat diperoleh melalui pengumuman di masjid dan dapat dilihat rinciannya di papan pengumuman masjid.

Keywords
manajemen zakat kesejahteraan

Topic
Kewirausahaan Dan Inovasi Bisnis

Link: https://ifory.id/abstract/Lkbwd9qGv2Z3

Corresponding Author
Rossy Sintya Marthasari

Institutions
a. Departemen Biologi Kedokteran
Fakultas Kedokteran Universitas Katolik Widya Mandala Surabaya
b. RS Awal Bros Makassar

Abstract
Vaginismus described as persistent or reccurent difficulties for woman to allow vaginal entry of a penis, a finger or there is often avoidance and anticipation, fear or experience of pain, along with variable involuntary contraction of pelvic muscle. Vaginismus can lead to unconsummated marriage, and also can be hidden caused of infertility. Vaginismus can be categorized as primary (lifelong), patient has never experiences non painful intercourse or secondary (acquired) , patient has previously normal but now experience pain. Vaginismus should be considered as part of differential diagnosis in patient who has no satisfaction in sexual intercourse or do not tolerate penetration. Diagnosis is made by making a good history taking. A variety of intervention have been suggested in some case report study. Effective treatment to vaginismus include sex education, psychosexual therapy, systematic desensitization, anxiolytic and Botulinum Toxin(botox). While there are few controlled studies on the management of vaginismus, they are limited and poorly designed. Goal of treatment is not only to acchive pregnancy but also increase quality of life. Either natural or assited, vaginismus is still have to be cured. A great teamwork is required to successfull therapy.

Keywords
vaginismus;infertility;desensitization; botulinum toxin; teamwork

Topic
Gender and Fertility

Link: https://ifory.id/abstract/43jNMFUh2Bb9

Corresponding Author
Rizal Arifin

Institutions
a) Department of Mechanical Engineering, Universitas Muhammadiyah Ponorogo, Jl Budi Utomo No. 10 Ponorogo, 63471 Indonesia
*rarifin[at]umpo.ac.id
b) Center of Materials Engineering and Energy, Universitas Muhammadiyah Ponorogo, Jl Budi Utomo No. 10 Ponorogo, 63471 Indonesia
c) Department of Informatics Engineering, Universitas Muhammadiyah Ponorogo, Jl Budi Utomo No. 10 Ponorogo, 63471 Indonesia

Abstract
In this paper, we evaluate the structure of glassy NiTi at the temperature of 10 K obtained from molecular dynamics simulations by various cooling times. The final configurations of glassy NiTi were produced by decreasing the temperature of the liquid NiTi rapidly from 2500 K until 10 K during 0,1 ns to 1 ns of cooling times. We find in our result that the count of BCC-like and Icosahedral-like local structure increase at the longer cooling times, while the count of HCP-like local structure decrease when the cooling times become longer. We also observe that the count of FCC-like local structure almost remains constant for all cooling times variation.

Keywords
glassy NiTi, local structure, cooling times, molecular dynamics simulations

Topic
Computational and characterization of materials

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

Corresponding Author
Adhi Satriyatama

Institutions
(a)Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Jalan Ganesha 10 Bandung 40132, Indonesia
*a.satriyatama[at]gmail.com
(b)Department of Material Engineering, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jalan Ganesha 10 Bandung 40132, Indonesia
(c) Department of Mechanical Engineering, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jalan Ganesha 10 Bandung 40132, Indonesia

Abstract
SONAR (Sound Navigation and Ranging) has been widely applied civilian and military needs. In order to avoid detection of enemy active sonar, submarines are equipped with acoustic tile which functions to absorb signals from active sonar and reduce the noise caused by the submarine itself. Polyisobutylene which is an active ingredient of material acoustic tile currently has high toxicity to aquatic organisms and manufacturing costs are quite expensive. Polystyrene and graphite as doping material have potential to be applied as an acoustic waves absorbent. In this study, graphite and polystyrene were made as acoustic absorbent acoustic wave composite material. The research begins with the stage of optimizing the percentage of matrix, filler, and thinner with sound absorption intensity parameters at frequencies of 50 Hz-6000 Hz with matrix results: filler: thinner at 79%: 6% 15%. The composite was then characterized by SEM-EDX at a magnification of 150× to 5000 × and calculated the value of its density. Mechanical test is also done by a compressive test with an optimum composite of 60G/40PS of 0.65 MPa. Test for salinity resistance in a solution of 3.5%wt NaCl and 3.5% MgCl2 for 120 hours and obtain optimum results at 80G/20PS. Tests for the absorption of acoustic waves were tested in the frequency range 50 Hz-6300 Hz using an impedance tube with an optimum composition of 0G/100PS.

Keywords
Polystyrene, Graphite, Composite, Acoustic Tile

Topic
Metal alloys, ceramics and composite materials

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

Corresponding Author
Hari Maghfiroh

Institutions
Dept. Electrical Engineering
Universitas Sebelas Maret
Indonesia

Abstract
Railway systems, especially electric railway, are more efficient compared to another mode of transportation. However, it consumes a lot of electrical power. Therefore, improving energy efficiency is a great interest to reduce operational cost. Traction motor consumes a lot of portion of energy in railway rolling stock. In this paper, the comparative study between Indirect Field Oriented Control (IFOC) sensored and IFOC-sensorless are studied in both performance and energy viewpoint to know which one has better efficiency. MRAS is chosen as speed estimation in sensorless method. Case studies with constant track and variable track were performed. The result shows that sensorless method using MRAS can be applied in railway application. However, its performance is decreases in braking mode shown by acceleration fluctuation. However, the speed performance is well. According to speed performance both methods have good result. In the energy point of view, sensored method resulted more energy from regenerative braking. From the total energy consumption, sensored method can save energy up to 33.76 % compared with sensorless method in constant track.

Keywords
railway, traction motor, motor control, sensorless

Topic
Electric System, Drives, Motors, Machinery

Link: https://ifory.id/abstract/Q432ndLDHxty

Corresponding Author
Pronay Kumar Chakrobarty

Institutions
Centre for Hybrid Automotive Research and Green Energy, University of Windsor, ON, Canada – N9B 3P4

Abstract
Fuel cells are being widely implemented as energy sources for various applications including hybrid electric vehicles as they offer lower emissions and improve the environmental conditions. However, due to their low output voltage and wide variation from no-load to full-load, a DC-DC converter is required to interface the fuel cell with the load. The major challenges associated with such DC-DC converters are to obtain high voltage gains and high efficiency for the overall performance of the fuel cell hybrid vehicle system. Therefore, it is of primary importance to select a suitable converter topology and flexible controls system which can capable of satisfying all the performance requirements. Thus, this paper presents a comparative review of DC –DC converters in power conditioning for fuel cell hybrid electric vehicles with discussion on recent trends in converter control strategies.

Keywords
Converter, Control strategy, Electric Vehicle, Fuel Cell, Topology

Topic
Power Electronics and Its Applications

Link: https://ifory.id/abstract/r3Ptca4WGBUT

Corresponding Author
Muhammad Yusuf

Institutions
1) Laboratory of Animal Reproduction, Faculty of Animal Science, Hasanuddin University, Makassar, Indonesia
2) Research Center for Biotechnology-Indonesian Institute of Sciences. Jl. Raya Bogor Km. 46, Cibinong, Bogor 16911, West Java, Indonesia

Abstract
The objective of this study was to determine the effect of using Bracket Oliphant medium (BO) extender at different temperatures on motility, viability, abnormalities and plasma membrane integrity of sexed sperms using fresh semen of Sumba Ongole (SO). Sexing sperms was carried out using a BO extender in the BSA column. The parameters observed in this study were motility, viability, abnormalities and plasma membrane integrity and were compared using the Paired-Sample t-Test with two treatments and six replications. P1 was BO extender with a temperature of 27oC and P2 was BO extender with a temperature of 37oC. The results of this study showed that there were no significant different (P>0.05) between the two treatments of the sperms X for motility (65.8%, 53.3% and 41.3% vs. 66.3%, 55.0% and 43.3%), viability (65.9%, 68.0% and 67.0% vs. 67.7%, 61.9% and 69.6%) and plasma membrane integrity (70.1% and 59.8% vs. 64.9% and 64.2%) after sexing, equilibration and thawing, but differed significantly (P<0.05) in abnormalities after sexing (15.5%, 15.6% and 16.2% vs. 15.5%, 17.3% and 19.5%). Likewise, the motility (66.7%, 55.8% and 42.1% vs. 65.8%, 55.0% and 42.1%), viability (68.8%, 59.0% and 64.5% vs. 67.4%, 59.4% and 71.7%), abnormalities (13.6%, 19.4% and 16.6% vs. 18.9%, 18.6% and 17.2%) and plasma membrane integrity (68.1% and 57.5% vs. 62.8% and 62.8%) of sperms Y at P1 and P2 did not differed significantly (P>0.05). The difference in the value of abnormalities after sexing is still within the limits of abnormalities of the sperms. It can be concluded that the use of the BO extender method can be used at a temperature of 27oC and at 37oC in the process of sexing sperms.

Keywords
Sperm, sexing, bracket oliphant, Sumba Ongole, Motility, Viability

Topic
Animal reproduction

Link: https://ifory.id/abstract/hGBpg3z7R4PM

Corresponding Author
Tua A. Tamba

Institutions
National Center for Sustainable Transportation Technology (NCSTT), Bandung, Indonesia

Abstract
CBTC (communication-based train control) is a new train control technology which aims at managing a platoon of several trains to move simultaneously on a particular train segment through precise maintenance of a predetermined inter-train safe distance. The success of the CBTC technology implementation thus relies strongly on the availability of dedicated real-time communication systems which can accommodate the continuous data/information exchange/transmission among neighboring trains. With an objective of reducing both the computational effort and the communication network loads/traffics in such a CBTC implementation, this paper proposes a Lyapunov-based event-triggered control scheduling approach which can guarantee the input-to-state stability property of the closed loop CBTC system.

Keywords
CBTC, event triggering, input-to-state stability, Lyapunov method

Topic
Control System

Link: https://ifory.id/abstract/7rZFjuXaD4YH

Corresponding Author
Muhammad Yusuf

Institutions
1) Laboratory of Animal Reproduction, Faculty of Animal Science, Hasanuddin University, Makassar, Indonesia
2) Research Center for Biotechnology-Indonesian Institute of Sciences. Jl. Raya Bogor Km. 46, Cibinong, Bogor 16911, West Java, Indonesia

Abstract
Sexing sperms is one of the reproductive technologies that is considered as a promising alternative in the effort of reproductive efficiency to produce offspring according to the desired sex. The method for maintaining and extending the perms can be done by using bovine serum albumin (BSA) column with Tris Buffer at room temperature and waterbath without damaging the quality of the sperms. The purpose of this study was to determine the effect of BSA - Tris Buffer extender on the quality of sexed sperms after thawing at 27°C and 37°C. The study was divided into two treatments; P1 was Tris extender in the temperature of 27°C and P2 was Tris extender in the temperature of 37°C with 6 replications. Those treatments were compared using a Paired Sample test (T-Test). The parameters observed in the present study were motility, viability, abnormalities, and plasma membrane integrity. The results showed that motility, viability, abnormalities, and plasma membrane integrity of the sperms X and Y at 27°C and 37°C after sexing did not differed significantly (P>0.05). Likewise, after equilibration, the motility of sperms X at 27°C and 37°C did not differed significantly (P>0.05), however, sperm Y at 27°C and 37°C showed a significant difference (P<0,05). Viability and abnormalities of sperms X at 27°C and 37°C differed significantly (P<0,05) but sperms Y at 27°C and 37°C did not show any significant differences. After thawing process, motility, viability, abnormalities and plasma membrane integrity of the sperms X and Y at 27°C and 37°C did not show any significant differences. However, it can be conluded that the quality of sexed sperms in the present study is still good because it has motility above 40% and abnormalities below 20%.

Keywords
Sexed sperms, Bovine Serum Albumin, Tris Aminomethane, and quality of the sperms

Topic
Animal reproduction

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

Corresponding Author
Muhammad Hamka Ibrahim

Institutions
Universitas Sebelas Maret

Abstract
Energy management plays important role in achieving maximum fuel efficiency on plug-in hybrid electric vehicle (PHEV). Capability of PHEV using electric (EV) mode and hybrid (HV) mode can be optimized by selecting efficient mode for known route and traffic condition. Typical intercity commuting traffic can be divided into city traffic and highway traffic. This paper presents measurements of PHEV energy consumption per distance for each city and highway traffic case. In case of full battery consumption, the optimal mode selection strategy is determined for each traffic case. This paper shows that the mode selection strategy using known route and traffic condition can achieve less fuel consumption compared to default PHEV configuration or no strategy.

Keywords
PHEV, electric mode, hybrid mode, fuel consumption

Topic
EV System and Integration

Link: https://ifory.id/abstract/bzuKafQP4vWw

Corresponding Author
Abdul Hakim Masyhur

Institutions
a) Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jalan Ganeca 10, Bandung 40132, Indonesia
*hakim[at]ftmd.itb.ac.id

Abstract
Commercial freight vehicle is essential for daily goods distribution from one place to another. It is quite common that freight operators load their trucks beyond the allowable weight limit to maximize profit. This behavior leads to deterioration of road surface in Indonesia, which significantly increases road maintenance cost. To remedy the situation, anterior strategy would be to provide overload prevention device, while posterior strategy should measure vehicle weight while it is moving and detect the overloaded vehicle. This paper deals with the first strategy, in which a bluetooth-based wireless strain measuring system is developed. The main subsystem which consisted of strain gage, Wheatstone bridge, Arduino Nano plus strain amplifier and Bluetooth modules, is placed on the load picking component of the vehicle, while additional subsystem consisted of Arduino Nano plus Bluetooth module and relays, is attached to the ignition wiring. Laboratory experiment showed that the system works and the design achieved the intended purpose, in the sense that it will cut engine power supply and trigger the alarm when the vehicle is overloaded. As a future work, we will install the system in a real vehicle to observe the performance of the system in an actual situation.

Keywords
Freight overload prevention, Wireless measurement, Bluetooth, Arduino, Strain gage, Strain amplifier

Topic
Transportation Safety

Link: https://ifory.id/abstract/REF6YwKQdAj7

Corresponding Author
Irine Herdjiono

Institutions
Musamus University

Abstract
This study aims to analyze the effect fundamental factor of finance to changes in profit at agricultural sector companies listed on the Indonesia Stock Exchange in 2010-2017. Population in this study is all agricultural sector companies that have been listed on the Indonesia Stock Exchange from 2010 to 2017, which are 21 companies. After selection using purposive sampling obtained a sample of 6 companies from 2010 to 2017 so that the total observation of this study was 48. The analytical technique used is multiple linear regression. The research results show that the current ratio, debt to asset ratio and total asset turnover do not affect changes in earnings, price earning ratio has a significant negative effect on earnings changes, and return on equity has a significant positive effect on changes in earnings.

Keywords
Current Ratio, Debt To Asset Ratio, Total Asset Turnover, Return On Equity, Price Earning Ratio, Profit Change.

Topic
Agriculture system

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

Corresponding Author
Yasser GHOULAM

Institutions
ICube laboratory (UMR CNRS 7357) - INSA Strasbourg

Abstract
The energy transition in the field of individual transport requires first of all changes in thinking: Do we need such important mobility ranges in our everyday lifes? How to use the vehicles stopping times for battery charging?...etc. However, this energy transition also requires technological improvements, mainly in the storage of electrical energy. In this context, the electric vehicle application is a rather particular field of application since it requires both a high degree of energy and a high power requirement. It tends not to be compatible with existing storage systems. One of the ideas to overcome this problem is to use a High Energy lithium-ion battery (HE) coupled with supercapacitors. The latter is used as a buffer to assist and preserve the battery, by responding to high and medium changes of current. It can also be charged during the deceleration and braking phases. In this case, the battery only sees the slow current changes. This paper presents a modelling, identification and validation of the behavior of the two main energy storage devices, battery and supercapacitor, of the hybrid energy storage system (HESS) in electric vehicle applications. Besides of both main storage elements, the HESS includes a bi-directional DC/DC power converter suitable for power electronic interface between the battery main energy storage system and the supercapacitor. This work begins by the modeling of DC/DC converter. Then the electric state space models of both power sources, battery and supercapacitor, are also developed. And following that lead, the identification of both storage components constituting the HESS is carried out via many optimization methods based on experimental data of an urban electric vehicle. For that, a test bench is used for battery and supercapacitor characterization, while trying to be as close as possible to the real electric vehicle application. The obtained results show the good performance of the state space developed models comparing with the experimental results from a test bench developped in our laboratory at INSA Strasbourg.

Keywords
Electric vehicle, hybrid energy storage system, lithium-ion battery, supercapacitor, optimization algorithm, bidirectional DC/DC converter, state space, identification, test bench

Topic
Battery Technology and Management System

Link: https://ifory.id/abstract/Qp4KDWGxjTUY

Corresponding Author
Yuslena Sari

Institutions
(a) Department of Information Technology, Faculty of Engineering Universitas Lambung Mangkurat
National Center for Sustainable Transportation Technology, Indonesia Banjarmasin, Indonesia
yuzlena[at]ulm.ac.id
(b) Department of Information Technology, Faculty of Engineering Universitas Lambung Mangkurat
National Center for Sustainable Transportation Technology, Indonesia Banjarmasin, Indonesia
andreyan.baskaraa[at]ulm.ac.id
(c) Department of Civil Engineering, Faculty of Engineering Universitas Lambung Mangkurat,
National Center for Sustainable Transportation Technology, Indonesia
Banjarmasin, Indonesia
puguh.prakoso[at]ulm.ac.id

Abstract
Cracks are one type of pavement surface damages, whose assessment is very important for developing road network maintenance strategies, which aims to ensure the functioning of the road and driving safety. Existing methods for automatic crack detection depend mostly on expensive equipment and high maintenance and cannot divide the crack segments accurately. This paper discusses an automation method of classification and segmentation of asphalt pavement cracks. The goal of the research is to classify asphalt pavement cracks using the classification method of the Support Vector Machine (SVM) algorithm and segmentation method of the OTSU algorithm. The OTSU algorithm for segmentation has advantages in choosing the optimal threshold that is stable. This algorithm is proven to be more effective and stronger than conventional segmentation algorithms. For detection results, the proposed method achieves overall accuracy.

Keywords
crack; SVM; segmentation; OTSU

Topic
Transportation Safety

Link: https://ifory.id/abstract/rEaWLyFzM3QR

Corresponding Author
Muhammad Alief Irham

Institutions
(a) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia
(b) Research Center for Nanosciences and Nanotechnology (RCNN), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia
(c) National Center for Sustainable Transportation Technology (NCSTT) , Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia
*ferry[at]fi.itb.ac.id

Abstract
LiNixMnyCozO2 (LNCM) with a high Li content (Li-rich LNCM) is a promising new type of cathode material for lithium ion battery (LIB) application. Li-rich LNCM has been reported to deliver higher specific capacity (>250 mAh/g) compared to LNCM cathode with standard Li content. Despite its outstanding performance, some works have reported instability of the material upon cycling. Many researchers have been suggesting the use of carbon, oxide, fluoride, and phosphate compounds as a coating material to improve its stability. In this work, Li1.2Ni0.64Co0.08Mn0.08 (LNCM811), a type of Li-rich LNCM cathode, was successfully synthesized via hydroxide co-precipitation method. The resulted product was then coated with NaTi2(PO4)3 (NTP), a promising phosphate compound with excellent chemical stability and superior ionic conductivity. It was found that NTP-coated LNCM811 delivered better electrochemical properties compared to the pristine one, as was determined using Electrochemical Impedance Spectroscopy (EIS).

Keywords
Lithium ion battery (LIB), LNCM cathode, Li-rich LNCM, surface coating, NaTi_2(PO_4)_3

Topic
Battery Technology and Management System

Link: https://ifory.id/abstract/wCGegkMAb9Fz

Corresponding Author
Putu Hendra Widyadharma

Institutions
1) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia

2) Department of Chemistry, Universitas Pertamina, Jl. Teuku Nyak Arief, Simprug, Jakarta 12220, Indonesia

3) Research Center for Nanosciences and Nanotechnology (RCNN), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia

4) National Center for Sustainable Transportation Technology (NCSTT), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia

Abstract
LiNi1-x-yCoxAlyO2 (NCA) is a commonly used material as a cathode in the latest generation of lithium-ion battery (LIB). NCA is a material that practically delivers high specific capacity (~200 mAh.g-1) with excellent electronic and ionic conductivity. Thanks to its extraordinary properties, NCA is projected to be used widely in the future generation of electric vehicles (EVs). Despite its advantages, its long synthesis time at high temperature is one of the problems that hamper its industrial mass production. Herein, we develop a new synthesis method by involving microwave-assisted heat treatment to reduce synthesis time and thus improve energy efficiency. In this work, LiNi0.8Co0.15Al0.05O2 (NCA) was successfully synthesized by using chemical co-precipitation method followed by microwave-assisted heat treatment. The resulted materials were then characterized using x-ray diffraction (XRD) and Electrochemical Impedance Spectroscopy (EIS). It was revealed that 15 minutes of microwave heating was able to cut 50% of 12 h total heat treatment time, marked with the successfully formed crystalline structure of NCA. Besides, NCA that was synthesized via microwave heating showed better electrochemical performance than NCA synthesized using a conventional method, indicated by a decrease of Rct in EIS measurement and an increase of specific capacity.

Keywords
lithium ion battery (LIB), cathode material, NCA, microwave-assisted heating

Topic
Battery Technology and Management System

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

Corresponding Author
Oktaviardi Bityasmawan Abdillah

Institutions
(a) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia
(b) Department of Chemistry, Universitas Pertamina, Jalan Teuku Nyak Arief, Simprug, Jakarta, 12220
(c) Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia
(d) Department of Chemistry, Faculty of Mathematics and Natural Sciences,Universitas Tanjungpura, Pontianak
Indonesia
(e) National Center for Sustainable Transportation Technology (NCSTT), Institut Teknologi Bandung (ITB), Jl. Ganesha 10 Bandung, 40132, Indonesia
*ferry[at]fi.itb.ac.id

Abstract
Due to its excellent properties, such as superior electrical conductivity and large surface area, graphene has been extensively studied for its application as anode material for lithium battery application. Graphene fabrication via the electrochemical exfoliation route is promising due to the low-cost and straightforward process. Herein, we added a pre-treatment of graphite sheet raw material using the immersion process in H2SO4/H2O2 mixture to pre-intercalate graphite before the exfoliation process. Pre-treatment time in the constant H2SO4/H2O2 volume ratio was optimized to obtain the best electrical conductivity and charge transfer resistance. On the prepared samples, the optimum period is 3 minutes, which generates the electrical conductivity of 3298 S m-1. The smallest charge transfer resistance yielded is 55.90 Ohm. Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) Spectroscopy were utilized for characterizing the morphology and elemental composition of samples.

Keywords
charge transfer resistance, electrical conductivity, electrochemical exfoliation, graphene, pre-treatment

Topic
Battery Technology and Management System

Link: https://ifory.id/abstract/bfEQAVH2hcjK

Corresponding Author
Tongat Tongat

Institutions
University of Muhammadiyah Malang

Abstract
Imprisonment dominates institutional based correction strategies started since the end of 18th century, a century later it was criticized as not acting as rehabilitative agents, but rather as stigmatizing, dehumanization, expensive, cruel and criminogenic. The debate pros and cons of using it as a result of the complexity of its negative effects are increasingly widespread. Community service order are present as an alternative prison sentence to reduce these negative impacts. Carrying out the big theme of community service order and its urgency in reducing the negative impact of imprisonment, this paper will discuss two issues: First, what is the negative impact arises due to the imposition of imprisonment? Second, the extent to which community service order have the relevance of reducing the negative impact of imprisonment? Through a doctrinal study with qualitative analysis, the following findings are found: First, there are so many negative impacts arising from the application of imprisonment that result in very complex follow-up effects, stigmatization, dehumanization and prisonization. Second, because community service order is essentially a punishment which outside of the institution, and finally the community service order is very relevant to reduce the negative impact of punishment application in the institution (imprisonment).

Keywords
community service order, negative impact, imprissonment

Topic
Criminal Law

Link: https://ifory.id/abstract/XFauc8b3Wm6h

Corresponding Author
A.K.M. WALIUZZAMAN

Institutions
BRAC University,Dhaka

Abstract
Electric three-wheeler vehicles are getting popular in many progressive countries and Bangladesh is one of them. Based on the study of current vehicle systems in Bangladesh novel design of a four-wheeler low cost safe electric vehicle has been approached in this research paper for daily uses. Double wishbone independent suspension system with high performance shock absorber helps the design to ensure a smooth movement. Implementation of CAN Bus system minimizes wire management and ensures a flawless data transfer with interactive control system. Sensor node based forward collision avoidance algorithm has been proposed to assuring safety and introducing a semi-autonomous control system. Custom designed integrated GPS tracking system diminish the chance of unwanted theft threat and maintain a strong navigation system. Different software-based simulation with a couple of real-life experiments in different road condition justify the sustainability and accuracy for all the designed systems.

Keywords
Electric car, Collision avoidance, CAN bus System

Topic
Electric System, Drives, Motors, Machinery

Link: https://ifory.id/abstract/3aHf7nWZhbY6

Corresponding Author
Sarip Sarip

Institutions
Fakultas Hukum, Universitas Muhammadiyah Cirebon

Abstract
ABSTRACT The issue of Non Food Cash Aid (BPNT) has occurred in managing and distributing to the community of Prosperous Family Card holders (KKS). The government is looking for solutions, to ensure that BPNT programs are implemented consistently and accurately. Practically the BPNT program is considered inconsistent, the quality of rice has decreased, the quantity of rice and egg is experiencing a decrease due to rising food prices. Distribution of BPNT in practice is conducted by community group and Village Owned Enterprise (BUMDes). The fact that the field of goodness is channeled by the community and BUMDes is inconsistent, making the KKS holders more vulnerable. The data were collected in South Kaliwedi Village, Kepandean Village, Indrapatra Village, Guwa Kidul Village, Sidawangi Village, and Cibeureum Village experiencing a decrease in quality and quantity in BPNT. Community groups and BUMDes do not have the authority to manage BPNT funds and only as BPNT distributors. The Trust Law No. 6 Year 2014 provides opportunities for BUMDes to optimize economic development in villages as a form of community economic development. Through field research conducted in several villages, village opportunities for village economics development through BUMDes optimization. Through the comparison method between community groups and BUMDes makes reference to better management of the village economy. The goal is to explore the opportunities of BUMDes, to develop the business, to explore the potential of the peoples economy, and to help improve the economy, both paddy farmers and layers of chicken who are often losers due to unstable prices. The role of BUMDes as a rural business entity is encouraged to improve the welfare of rural communities through economic development. Management and channeling by groups seem to be prospering groups or individuals alone in this case the capital owner. Management and channeling of BPNT has been implemented by BUMDes as a form of rural development from the outskirts and at the same time is a national program of developing villages. The government should provide space for BUMDes in the management and distribution of BPNT to avoid the deviations that occur in the practice of BPNT.

Keywords
Optimization, BUMDes, BPNT, Management, Dispensing.

Topic
Administratif Law

Link: https://ifory.id/abstract/EC9XzAmQkU8B

Corresponding Author
Simon Shepherd

Institutions
Institute for Transport Studies
University of Leeds
UK

Abstract
In this paper I reflect on the use of product diffusion models using a system dynamics approach in the forecasting of transition pathways around the uptake of electric vehicles. I look back at how realistic my previous work was for the UK given we now have 8 years of sales data. I find that the previous forecast was overly optimistic and after re-validating the model the forecast is for a weal uptake at best. I consider the different elements of uncertainty in the used models. There are uncertainties in terms of input parameters based on validation with limited sales data, uncertainty from assumed behavioural parameters within the product diffusion process and the choice model. Structural uncertainty in terms of assumed availability and finally structural uncertainty in terms of delay structure assumed in the typical models used to model fleet turn-over is considered. This last structure has important implications on the most optimistic transitions often in the minds of key stakeholders and policy makers. Finally I look at the use of such a model in the electric scooter market for Bandung.

Keywords
system dynamics, transition pathways, modelling, policy

Topic
EV Socio-Economical Impact

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