Indonesia Conference Directory

Corresponding Author
Nyoman Budiartha Raka Mandi

Institutions
Department of Civil Engineering, Faculty of Engineering, Udayana University.
Kampus Bukit Jimbaran, Badung 80361, Bali, Indonesia

Abstract
Bali island has several ports, and three of them are used ships- layover. Those ports are: Benoa port in the southern of the island, Celukan Bawang port in the northern part, and Padangbai/Tanah Ampo port in the eastern part; with most of tourism activities are concentrated in the southern part. Disadvantageous management and competition between those ports raised the question and challenge for the cruise port and its nearest vicinity. A cooperation is required to enable those ports to compete more effectively, in attracting tourists and supporting the island-s tourism destination development. This study employed a set of semi-structured interviews (SSI) and the spot field observation in assessing the port-s management for tourism destination-s development. The result of this study is expected to contribute in providing useful information for tourism destination development and for the industry itself, which are constantly growing and attractive for international tourists.

Keywords
cruise port, management and competition, cooperation, tourism destination development

Topic
Civil Engineering

Link: https://ifory.id/abstract/Thu8vMBKUzR9

Corresponding Author
Irma Saraswati

Institutions
Departement of Electrical Enngineering, Faculty of Engineering, University of SUltan Ageng Tirtayasa Banten

Abstract
The high level of activity of internet users, which will have a negative impact on information providers. Requests from many users can cause performance capabilities on the web-server to decrease. The large number of requests results in crashes or overloads that have an impact on requests that cannot be served by a single server. Web balancing technology is needed so that the incoming request load is not only served by one server. Some scheduling algorithms that will be applied to web balancing testing in this study are round-robin and weight round-robin. In this study using ipvsadm as a means of making web balancing. This test aims to determine the performance of web servers when using web balancing technology by measuring the QoS parameters of web server services. The results show, the best value for measuring QoS parameters is responese time, request error, throughput, in the weight round-robin scheduling algorithm method.

Keywords
Web Balancing, ipvsadm, round-robin, weight round-robin

Topic
Computer Engineering

Link: https://ifory.id/abstract/nPU3HLxKGTdq

Corresponding Author
Venny Iswantiningtyas

Institutions
1,2,3) Universitas Nusantara PGRI Kediri

Abstract
Play and Games are two aspects that are familiar and very close to children. The game can be an effective learning tool for early childhood. Traditional Javanese games can be a learning suggestion for kindergarten students to practice social skills and introducing mathematics in a fun way. Children will be more interested in learning mathematics. This study aims to develop traditional Javanese games that can train the ability to socialize and introducing mathematics from an early age. Traditional games developed include Dakon and Gejlig. The development of traditional games is based on the needs of kindergarten students to learn mathematics and learn to socialize. The sample in this study were kindergarten students who were invited to study mathematics while playing. Two of the games taught to children are Dakon and Gejlig. The Dakon game is played by two students. Through the Dakon game, students are trained to learn to count and recognize simple addition and subtraction operations by counting the seeds played. Students who win are students who at the end of the game Dakon get more seeds than their friends. In the game of Gejlig, the number of students playing is not only two, but can be in groups of four or five students. In this game students can take turns jumping on a flat building that has been arranged on the floor / ground. If the traditional game is usually, flat buildings drawn only in the form of a square or half circle, in this study students are free to create their own set of flat building that they will use to play. Thus, students know more about waking up flat through the game of Gejilg. Javanese Traditional games can be an interesting media for early childhood to learn mathematics and learn to socialize with their peers. The results of this study indicate that through traditional Javanese games, there are many mathematical concepts that can be taught to students, such as the concept of addition and subtraction and shapes.

Keywords
Kindergarten, Mathematics for Early Age, Javanese Traditional Games, Shapes, Mathematics Operation

Topic
Mathematics Education

Link: https://ifory.id/abstract/En2NPgMVdrR3

Corresponding Author
Tuti Nur Fitri

Institutions
University of Indonesia

Abstract
Aluminum with a composition of 7-10% Silicone (Si), 2-4% Copper (Cu) was a matrix used with the addition variations of nano-SiC reinforcement particle 0.25; 0.3; 0.4% Vf with the intention of fabricate bullet-proof materials that have high toughness, impact resistance and good strength. In this research, composite was fabricated by stir casting method possessed superior properties due to an effective bonding between matrix and reinforcement particles. In addition to of nano-SiC as a reinforcement particle also followed by the addition of 5 %wt Magnesium (Mg) as the wetting agent, 0.04 %wt Stronsium (Sr) as the modifier, and 0.15 %wt Al-5Ti-1B as the grain reinforcement. The fabricated composite specimens were subjected to various tests to determine the mechanical properties such as density, porosity, hardness, tensile strength, impact, and ballistic testing. The results were compared with basic matrix alloy. Furthermore, the uses of Optical Microscope (OM), Scanning Electron Microscope (SEM), Dispersive X-Ray Spectroscopy (EDX), dan X-Ray Diffraction (XRD) analyses were carried out to analyze the dispersion of the reinforced particles in the selected matrix alloy.

Keywords
Aluminum composites, Nano SiC, AC4B, bulletproof materials, stir casting

Topic
Materials Science

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

Corresponding Author
Anton Irawan

Institutions
a) Chemical Engineering Department- University of Sultan Ageng Tirtayasa, Jalan Jendral Soedirman Km 3 Cilegon 40135 - Indonesia *anton11975[at]yahoo.com

b)Chemical Engineering Department- Bandung Institute of Technology

Abstract
Nowadays, Plastics are widely used mainly as packaging. With the increasing use of plastic, the amount of plastic waste was increasing. Plastic was a material that was difficult to decompose naturally so that plastic waste will continue to accumulate. This condition will disturbance the environment. In other conditions, energy needs, especially fuel oil, are increasing but the availability of crude oil was limited. This condition requires alternative fuels to maintain the availability of fuel oil for the needs of industry, vehicles and households. Both of these conditions can be related to convert plastic waste into fuel oil through the pyrolysis process. Pyrolysis of plastic waste can be done as thermally and catalytically. The thermal plastic pyrolysis process can be carried out at temperatures between 400-500oC and pyrolysis time between 30-60 minutes. The results of pyrolysis of plastic waste produce fuel oil which can be used as fuel in industries such as boilers. GC analysis of gas composition, calorific value and flame test provide a description of the use of fuel oil from the pyrolysis of plastic waste.

Keywords
Plastic Waste, Pyrolysis, Fuel Oil, Calorific Value, Flame

Topic
Chemical Engineering

Link: https://ifory.id/abstract/BZ8hWR2Jtk4n

Corresponding Author
WIDYA ASTRIYANI

Institutions
a. Department of Electrical Engineering, University of Indonesia
Jalan Salemba Raya, RW.5, Kenari, Senen, Central Jakarta City, Jakarta 10430
*widyaast[at]gmail.com

b. Department of Electrical Engineering, University of Indonesia
Jl. Margonda Raya, Pondok Cina, Beji, Kota Depok, Jawa Barat 16424, Indonesia

Abstract
The commercial sector counts as one of the biggest consumers of electrical energy. Thus, efforts to save electricity in this sector will also influence significant energy efficiency. Some of the electricity loads that can be saved in this sector include air conditioners (AC), lights, lighting, elevators, pumps, and other electrical equipment. Use of air conditioner in commercial sector can be reduced by control management, both in temperature and power control. Direct load control (DLC) is the control system that can adjust the time schedule for temperature setting and power setting. The results of this paper is to see the potential energy reduced and cost reduced from using DLC in commercial sector specifically office building.

Keywords
Direct Load Control, Air Conditioner, Commercial Sector, Energy

Topic
Electrical Engineering

Link: https://ifory.id/abstract/zb6vXnZCrULu

Corresponding Author
Furry Ayu Agustiyani

Institutions
a) Universitas Indonesia
Kampus Baru UI Depok - 16424, Indonesia
*furryayu[at]gmail.com

Abstract
Pedestrian is growing concern, especially in supporting the use of public transportation, because walking is an activity towards and leaving public transportation facilities. Pedestrians are the most vulnerable road users, so the safety and comfort of walking need to be considered. In Indonesia, there were 486.295 accidents with 787.916 victims and 1,1 Trillion material losses in 2013 to 2017. The data also explained that 16.2% of the total pedestrian crashes, which is 96% occurred when pedestrians were walking in areas without zebra crossing and 4% were walking in zebra crossing areas. In the city of Magelang, 27,4% of traffic fatalities were pedestrian fatalities. This amount is the highest number of all cities in Central Java Province (Magelang, Pekalongan, Salatiga, Semarang, Surakarta, and Tegal). There were 175 data of pedestrian crashes with 177 pedestrian victims, which 21% are fatalities. Based on the age of pedestrians, pedestrians are divided into 3 age categories: 0-17 years old are children, 18-65 years old are adults, more than 65 years old are elderly. Factors that significantly affect injury severity pedestrians are days of the week (weekends / weekdays), time of day (night / daylight), lighting condition (dark / light), weather condition (rain / clear), road surface condition (wet / dry), gender (male / female), Pedestrian maneuver before crash ( crossing street / walking along roadway), crash location (road / intersection). This study will be assumed to use a binomial ordered probit model with regard to age at pedestrian accidents. This study will be analyzed using R software to determine the probability of factors affecting pedestrian injury severity.

Keywords
Accident, Safety, Pedestrian, Injury Severity, Age, Binomial Ordered Probit Model

Topic
Civil Engineering

Link: https://ifory.id/abstract/cBAX8PxEhCV4

Corresponding Author
Asaf Kleopas Sugih

Institutions
Chemical Engineering Department,
Parahyangan Catholic University,
Jl. Ciumbuleuit 94
Bandung 40141
Indonesia

Abstract
Tapioca starch is isolated from the root of cassava (Manihot esculenta) plant cultivated mainly in tropical areas of Asia, Africa, and America. Tapioca starch has very low residual impurities, bland flavor, and superior gel properties. Native and modified tapioca starch has been widely utilized for food applications. In this research, a preliminary study on the use of different types of phosphorylating reagents (Sodium Tripolyphosphate/ STPP, Sodium Trimetaphosphate/ STMP, and mixture of both reagents) on the synthesis of modified tapioca starch was performed. Phosphorylation of tapioca starch was performed at a temperature of 130 oC , initial suspension pH of 9, and an intake of STPP of 5 %-w/w and/ or STMP of 2 %-w/w based on dry starch. The experimental result shows that modified starch products with Degree of Substitution (DS) of 0.0084-0.0132 (correlated to P-content of 0.169-0.258 %-w/w) were obtained. The use of both STPP and STMP phosphorylating reagents gives starch products with increased solubility. Phosphorylation with all types of reagent also increases water and oil absorption capacity as well as paste clarity of tapioca starch. The result suggests that STPP and STMP are potential phosphorylating agents for modified tapioca starch preparation.

Keywords
Tapioca; Cassava Starch; Modified Starch; Phosphorylation

Topic
Chemical Engineering

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

Corresponding Author
Femy Sanana Sanvia

Institutions
a) Electricity and Energy Management, Department of Electrical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia
*femysanana[at]gmail.com
b) Department of Electrical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia

Abstract
The Industrial and Commercial sectors are the largest electricity energy consumption. Building-s system that used the biggest electrical energy consumption, especially in the Industrial and commercial sectors, are air conditioning systems, lighting systems, and building transportation systems. Energy Saving Performance Contract (ESPC) could be an alternative to support implementation of energy efficiency in the building sector up to 10-30%. This study investigates the application of ESPC in the retrofit of the air conditioning system in Industrial and Commercial building, Chiller. Chiller retrofit can produce electrical energy efficiency of 210 MWh / year or reduce electrical energy consumption by up to 30% with a 5-year payback period investment. This study can be broadened to develop application of ESPC in Indonesia.

Keywords
Energy Saving Performance Contract; Retrofit; Energy Efficiency

Topic
Electrical Engineering

Link: https://ifory.id/abstract/hN6p4yurRLdq

Corresponding Author
Hans Thiery Tjong

Institutions
Mechanical Engineering Universitas Indonesia

Abstract
The analysis of central mass system has developed the stability control over devices by applying Newton-s law of central gravity. The central mass of a body can be shifted to a desired position for stability. The moment system can be applied in predicting central mass position in order to keep the body from falling over a slope by calculating speed, mass and central mass position. This system will be implemented by liquid movement or other object movement which will shift the central mass position.

Keywords
amateur, assistance, bicycle, stability

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/QVwahNF8CdJT

Corresponding Author
Krisna Wisnu Sarwenda

Institutions
Mining Engineering Department, Faculty of engineering Mulawarman University

Abstract
Indonesia has coal reserves of around 166 billion tons of resources and 37 billion tons of reserves. Kalimantan land recorded as the region that holds the largest coal reserves, which is 14.9 billion tons, the largest reserves are in the east Kalimantan region of 7.5 billion tons. One effort to optimize low rank coal is to utilize the low rank coal as raw material for carbonized coal briquettes. Low rank coal research materials are obtained from the new Kampung formation. This resesarch aims to determine the carbonization coal briquette method with a temperature of 600oC in three types of organic binders namely sago flour, tapioca flour and molasses. The carbonization process is carried out for 6 hours. Carbonized coal is crushing at a size of 30 mesh, carbonized coal that has been crushing is mixed with organic binder, then printed with a manual hydraulic system of 15 kg/cm2, then dried. The quality testing of carbonized coal includes parameters of inherent moisture, ash content, volatile matter, fixed carbon and calorific value. The results showed that the carbonized coal briquette produced had the following properties: inherent moisture 11.28% - 14.21%, ash content 6.39% - 8.15%, volatile matter 37.685% - 46.07%, fixed carbon 34.51% - 42.24%, and caloric value 5632.40 cal/gr - 6937.13 cal/gr. Carbonized coal briquette that produce the highest calorific value are obtained from a combination of carbonized coal with tapioca flour, which is 6937.13 cal/gr. The quality of caloric value is fullfiled the coal briquette standard trading for SNI.

Keywords
Low rank coal, carbonization, briquette, caloric value

Topic
Materials Science

Link: https://ifory.id/abstract/6PpWDwv9GBqx

Corresponding Author
Andinnie Juniarsih

Institutions
Universitas Sultan Ageng Tirtayasa

Abstract
There are two types of iron resources such as primary iron ore and iron sand. In general, primary iron ores use as raw materials in iron and steel making and can reduce directly. In Direct reduction process, Fe2O3 (hematite) is converted to metallic iron by the removal of oxygen. This work presents a kinetics study for direct reduction process of iron ore pellet. An investigation has been carried out of different reduction parameter such as differens sizes cylindrical geometry over temperatures ranging from 700oC to 1100oC for reaction time from 10 minutes to 1 hour. A number of different gas-solid reaction models was used to evaluate the reduction mechanism. The result was indicated that the initial reaction stage is chemically controlled which gradually transitions to diffusion controlled. The Arrhenius plot was used to determine the activation energy and pre-exponential factor for the corresponding reactions, compared with available data in the literature

Keywords
Pellet Geometry, Kinetics, Reduction, Iron Ore, gas-solid reaction model

Topic
Metallurgy Engineering

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

Corresponding Author
MUNIRWANSYAH MUNIRWANSYAH

Institutions
(1) Lecturer of Civil Engineering, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia.
(2) Lecturer of Urban and Regional Planning, Institute Technology of Sumatera, Bandar Lampung, 35365, Indonesia.

corresponding author email: r.munirwan[at]unsyiah.ac.id

Abstract
Banda Aceh is surrounded by the subduction of Indo-Australia and Eurasia plate which may cause the tsunami. One of it was the tsunami which occurred in Aceh on December 26th, 2004. The governments lack of preparedness for temporary evacuation sites in the high risk disaster zone caused the large number of casualties. Hence it is necessary to build evacuation facilities such as escape hill. The objective of this research is including to determine the bearing capacity of the soil subgrade below escape hill soil embankment and settlement, due to the load of the embankment height (Hcrit) and the value of the safety factor. This study is conducted in Deah Baro with the Geographic Coordinate System(GCS) 5º3345.72"N - 95º1751.34"E. The calculation method of Hcrit in this study was conducted by using Plaxis 8.2, which started from the existing site to 15.00 m or higher than Tsunami run-up wave height 12.00 m. This study uses soil parameters variation modeling by increasing the soil cohesion value (c) and soil friction angle (φ) proportionally with simulation to get stable condition by safety factor (SF) greater than 2.5. The result of this research found that the soil subgrade settlement δ=17.45 cm with SF=1.04 that is less than 2.5, which is still within in the tolerance limits and the subgrade is still able to withstand the embankment load. As the last result, the most stable condition at Hcrit =15.00 m was obtained in the soil parameter modeling with the c =1.5 kN/m2 and φ = 30º, with δ = 15.96 cm and SF= 1.33 which can be used for the escape hill design material embankment.

Keywords
Escape hill; Critical embankment height; Run up height; Soil settlement; Safety factor

Topic
Civil Engineering

Link: https://ifory.id/abstract/fQbv6ymXw8dL

Corresponding Author
Henry Wicaksana

Institutions
Departement of Chemical Engineering, Faculty Technology of Industry, Institut Teknologi Sepuluh Nopember Surabaya, Jl. Arief Rahman Hakim, Surabaya 60111, Indonesia
*onramus[at]chem-eng.its.ac.id

Abstract
In petroleum refining processes, such as naphtha hydrotreater (NHT) unit, catalysts are important components to improve the yield of high-quality product. These catalysts are susceptible to inactivation caused by adsorption of sulphur (S) and by metals impurities, such as iron (Fe) and arsenic (As) from the process in a certain time. But the replacement of deactivated catalyst requires a large cost, so the regeneration of catalysts can be an alternative to reduce these costs. And ultrasound is an effective method for regenerating catalysts because the operating conditions and solvents are more environmentally friendly. The effect of ultrasound temperature and presence of citric acid on impurities removal of spent catalyst NiMo was investigated in this study. The mixture of the spent catalyst and 1% citric acid (1/20 (w/v)) was treated by ultrasound at 20% amplitude, 20 minutes and various temperature (30–70°C). After process, solid product was analyzed using Scanning Electron Microscopy (SEM) and X-Ray Fluorescence (XRF). The liquid product was analyzed with Atomic Absorption Spectroscopy (AAS). The content of S was decreased after ultrasound (from 17.3% to 3.8%). The optimum condition was achieved at 50°C and 20 min. Based on AAS analysis which showed Fe composition 73,20 ppm.

Keywords
Citric acid, Deactivation, Regeneration, Spent catalyst, Ultrasound

Topic
Materials Science

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

Corresponding Author
Nurul Ilmaniar

Institutions
University of Indonesia
(a) Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Beji, Depok, 16424, Indonesia
*sugeng[at]eng.ui.ac.id

Abstract
Ti-6Al-4V alloy is a common material for orthopedic implant due its high strength-to-weight ratio, corrosion resistance, and biocompatibility. Surgical intervention is required to introduce implant into the body, but it comes with risk of biomaterial associated infection (BAI) or periprosthetic joint infections (PJI). Biomaterial associated infection and periprosthetic joint infections are associated with the presence of bacteria on implant surfaces where they produce biofilm and eventually lead to loosening and implant failure. Treatments for both infections are costly since they require additional surgery to reduce infections and remove biofilm. Surface-modified implants have been introduced with minimum surface roughness to prevent such infections. A key feature is nano-scaled topography with a size of 1-100 nm which minimize bacterial attachment as the initial stage of BAI and PJI. This work aims to study the use Plasma Electrolytic Polishing, an electrochemical machining using high voltage and environmentally friendly electrolyte, to produce low roughness and nano-scaled topography on implant surfaces. Each workpiece is polished in electrolyte comprised of phosphoric acid, sodium perchlorate, and hydrofluoric acid using DC power supply with voltage of 180-400 V. Surface profile of polished workpiece is observed using AFM and SEM whereas the antibacterial properties are tested using the method of disk-diffusion assay.

Keywords
Plasma Electrolytic Polishing, Ti-6Al-4V Implant, Antibacterial properties, Surface roughness, Biofilm inhibition

Topic
Materials Science

Link: https://ifory.id/abstract/qzeANZGVx3mv

Corresponding Author
Wan Nor Zanariah Zainol Abdullah

Institutions
(a) Department of Engineering, Faculty of Agriculture, Sciences and Technology, Universiti Putra Malaysia Bintulu Campus Sarawak, Malaysia.
(b) Department of Agricultural Science, Faculty of Engineering, Universiti Putra Malaysia Bintulu Campus Sarawak, Malaysia.

Abstract
The use of geospatial technology is increasing in various sector including agriculture and agronomy sectors. It is commonly use in monitoring of agricultural activity as well as it is become a good resource to increase the agricultural production. As black pepper is one of the important cash crops supporting the livelihood of about 67000 rural dwellers in upland areas of Sarawak, Malaysia. Thus, black pepper crop is selected as a main target in this study. This study is conducted to monitor black pepper growth through field measurement and vegetation indices, to develop pepper inventory as well as to provide proper mapping system of pepper farm. As a pilot study to observe the black pepper cultivation in Sarawak, pepper farm at UPM Bintulu Sarawak Campus is selected as a study area. Digital Pepper Farm is in line with the current initiative by Sarawak Government, Sarawak Digital Economy Strategy 2018 to 2022 and agriculture is one of its strategic actions, objectively to improve productivity and efficiency of the agricultural sector by adopting ICT and digital technologies. Mapping of black pepper plantation is important as it gives spatial information and usable way to manage the available sources such as water, fertilizer and herbicide. Mapping is one of the ways to represent geographical data in a usable way and a basic need to operate any variable rate application machine in precision agriculture. Crop mapping is one of the crucial method need to be done in order to create crop inventory. A map of tree locations could reveal growth patterns across the landscape. GPS field data (tree locations) as well as inventory data such as tree height, number of leafs on the tree, number of bud appeared of the individual young pepper trees; as well as other features at the farm will be collected. At the same time, multi-spectral and multi temporal optical image of Landsat 8 will be analyzed for the periodical crop growth performance. Images data were collected through the reflection of (red, green, blue and near infrared, NIR) wavelength. Data extraction analysis will be done through the vegetation index analysis (VIA). Both results from the field data collection and software analyzed are significant in the development of base map and inventory system for the Digital Sarawak pepper farming at UPM Bintulu Sarawak Campus (UPMKB). In addition, an inventory of black pepper tree locations provides invaluable information about the current condition of the farm, production status and potential economic value of the land. Pepper tree inventory is relevant for plantation managers to estimate stand, yield and production cost per unit area for decision making in replacing missing trees and replanting old stand.

Keywords
Black pepper, plant growth monitoring, mapping, inventory system.

Topic
Agricultural structures and environmental engineering

Link: https://ifory.id/abstract/CgtmQMGjT24Y

Corresponding Author
Rita Purwasih

Institutions
a) Agroindustry, Politekik Negeri Subang
Jalan Brigjen Katamso No. 37 (Belakang RSUD Subang), Dangdeur, Subang, Jawa Barat, Indonesia
*rita.purwasih[at]gmail.com

Abstract
Abstract. This study aimed to determine the chemical content of cookies with the addition of chicken feet flour and chicken neck bones flour of these cookies. The experimental design used was a completely randomized design (CRD) with 3 treatments and 3 replications. The treatment given is T0 (wheat flour); T1 (wheat flour + feet flour); and T2 (flour + neck bone flour). Variables measured include water, ash, fat, protein, carbohydrate, calcium, and phosphos. The data obtained were analyzed using variance analysis followed by the Smallest Significant Difference Test (LSD). The results of the variance analysis showed that the addition of chicken feet flour and neck bones flour had a significant effect (P <0.05) on ash content; fat; protein; carbohydrate; calcium and phosphor.

Keywords
chicken feet, cookies, neck bones, nutrition, flour

Topic
Post harvest handling and processing of meat, milk, eggs, wools, and by-products

Link: https://ifory.id/abstract/WEh8MmUJCA9d

Corresponding Author
Ani Ardian

Institutions
University of Muhammadiyah Sidenreng Rappang

Abstract
Public transportation in the district Sidenreng Rappang is a priority for the immediate formulated its policies especially public transport passengers. The problem arises because of the lack of supervision, public transport fares, route system settings/route that has not been done in, hierarchy transports carrying passengers in terminal. Therefore, it takes the role of stakeholders in an integrated management, strategic, and sustainable system to support the design in the form of governance on the public transport passengers, planning within the scope of the problem management and operation. The study aims to identify the role of stakeholders based on the level the influence and their interests on public transport in Sidrap Regency. The collection of data is collected through observation field and in-depth interviews to stakeholders. The method of analysis data using analysis stakeholders. The research results show that stakeholders who engage in governance in the management of public transport in Sidenreng Rappang Regency were divided into two groups and bestowed his key players group is ( high and the influence of high ) and as actors and bestowed his group low and the influence of high. Stakeholders including key player is the head of the the DPRD of Sidrap Regency, sidrap regent, the head of BAPPEDA Sidrap Regency, head of financial management agency Sidrap Regency, head of department of transportation Sidrap Regency, and heads of agencies Sidrap Regency environment. Stakeholders including as actors were community figures, non-governmental organizations (NGOs), and academics. Stakeholders group this key players must be more active engage very full of included in evaluate a new strategy. Stakeholders risk this could bring in policies and thus their existence need to monitored and well-managed. To optimize stakeholders and the role of the actors have to do exchange or inform stakeholders the key players.

Keywords
Governance, Transportation, Stakeholders

Topic
Sustainable Development Goals

Link: https://ifory.id/abstract/eVPDChb6aYyf

Corresponding Author
doso sarwanto

Institutions
Faculty of Animal Husbandry, Wijayakusuma University, Purwokerto, 53152, Indonesia

Abstract
The negative effect of limestone mining is the formation of open field which caused the reduction of diversity level and the productivity of indigenous forages. The open field that was used as a limestone mining can be revegetated through the introduction of Dwarf Elephant Grass (Pennisetum purpureum cv. Mott). We need a further study about the distribution level of the introduction result of dwarf elephant grass as the substitute of indigenous goat forages in limestone area. The research method used in this research is experimental in vivo using Completed Random Sampling. The materials used in this study are 16 local male goats from limestone area weighed about 25,8 kg ± 1,66. The treatment consists of 4 dwarf elephant grass-s distribution levels as the substitute of indigenous forages, i.e. 0, 25%, 50% and 75% with 4 repetitions. The parameter consists of feed intake and body weight gain. This research is located in Gombong-s limestone mountain area in Central Java, Indonesia. The result of this research shows that the distribution dwarf elephant grass as the substitute of indigenous goat forages until 75% has non significant (P>0,05) of feed intake and body weight gain. Meanwhile, if we reviewed from the tendency of body weight gain, the distribution of dwarf elephant grass as the substitute of indigenous goat forages should only reach 25%.

Keywords
dwarf elephant grass, indigenous forages, goat, limestone mountain

Topic
Feeds, feeding, and animal nutrition

Link: https://ifory.id/abstract/kULA4XfYKGbd

Corresponding Author
Rahayu Widiyanti

Institutions
Fakultas Peternakan UNSOED

Abstract
This study aims to get a deeper explanation of vertical integration in the broiler industry in Indonesia. The data used is secondary data on case decisions number 02 / KPPU-I / 2016. Komisi Pengawas Persaingan Usaha (KPPU) Republik Indonesia has issued a decision about the alleged violation of article11 of Act Number 5 of 1999 related to the regulation of broiler production in Indonesia. The data obtained were analyzed by descriptive method. The results obtained are (1) there are 14 large companies that are directly related to the broiler trade industry, (2) broiler industry products are DOC, feed, vitamins and drugs, raw materials for poultry feed and carcasses, (3) the business category in the broiler trade industry is integrated business, semi-integration business and non-integrated businesses. Business integration consists of vertical integration and horizontal integration. Vertical integration is a business that has a series of production processes from upstream to downstream. semi-integration business is a business that only has more than one production line but does not control the business from upstream to downstream. non-integrated business is a business that only has one production process. Integration business has a dominant market share and can influence the price maker. It was suggested that the Government monitor more closely the large companies that carry out integration so as not to collude and form a monopoly market.

Keywords
business integration, vertical integration, broiler industry

Topic
Socio-economic aspects of animal farming

Link: https://ifory.id/abstract/R3FJEpH6tMaQ

Corresponding Author
Sri Bandiati Komar Prajoga Bandiati Komar Parjoga

Institutions
Department of Animal Production, Faculty of Animal Husbandry, Padjadjaran University,Bandung Sumedang KM.21 street, Hegarmanah, Jatinangor, Sumedang district, West Java 45363

Abstract
Padjadjaran sheep was a local sheep that has undergone purebreeding in the form of linebred, has a variation of mt-DNA in the form of 75 bp deletions at the posision of 1447-1522 bp. Male birth weight was 3.5 - 4 kg, while adult body weight (18 months) was 35-45 kg. On the molecular genetic side Albumin was the guardian of the osmotic balance of blood, Albumin will encourage fluid if the condition low in the blood and pushes out if the liquid high in blood . Albumin was formed in the liver and binds absorbed nutrients to spread throughout the body. In high body fluids in sheep causes swelling in the whole body and there was a tendency to less optimal growth. Growth was an increase in body weight in a certain period of time, which was divided into stages of acceleration and deceleration. In elite rum selection programs carried out based on individual data, the ranking based on their position in the population. The research method was descriptive for quantitative charakter and data analysis using correlation, as well as the SDS-page method for blood protein analysis. The object of the study was 46 rams as candidate for elite rums, which had body weight between 27 - 45 kg, with an average body weight of 35.3 kg. The results showed that the blood protein Albumin of Padjadjaran sheep was spread in several alleles from Alb. A, Alb.B, Alb.C, Alb.D, Alb.E and Alb.F. All of population have (100%) have Albumin A which had highest Correlation (0,21) with body weight gain aged 17 to 18 months, while the other Alb alleles showed a low correlation

Keywords
Key words: Padjadjaran sheep, Blood Protein Albumin , Accelaration , Deceleration

Topic
General animal production and husbandries (ruminants and non-ruminants)

Link: https://ifory.id/abstract/Xg9mMfdYypPn

Corresponding Author
Tati Rohayati

Institutions
Universitas Garut

Abstract
The quality of the pellets is determined by the ingredients of pellets. This study aims to determine the amount of Indigofera zollingeriana and banana corm that fermented by Trichoderma harzianum as a substitute for soybean meal and rice bran in ration on the physical qualities of pellets. The research method was experimental using a completely randomized design with a factorial pattern consisting of two factors and each five treatment and two replications. Experimental data were analyzed by analysis variance, then to find out the differences between treatments were analyzed by Duncans Multiple Range Test. The results showed that there was an interaction between the use of Indigofera zolingeriana and banana corm on durability and density of pellet. The highest pellet durability was obtained by using 26% Indigofera zollingeriana and 1.25% banana corm, while the highest pellet density was obtained using 0% Indigofera zollingeriana and 1.25% banana corm.

Keywords
Physic, Indigofera zollingeriana, Banana Corm, Pellets.

Topic
Feeds, feeding, and animal nutrition

Link: https://ifory.id/abstract/hv8z6X2EYA4P

Corresponding Author
Hari Dwi Utami

Institutions
Faculty of Animal Science, Brawijaya University

Abstract
Study was carried out at Banyuwangi Regency, East Java of Indonesia. The research objectives were to investigate financial performance of the broiler duck farming based on farm-scales. 10 respondents who joining in farmer group were obtained by multistage sampling method that categorized into three farm-scales namely, small-scale (having 200-1,266 birds, n = 6), medium-scale (controlling 1,266-2,533 birds, n= 2) and large-scale: rearing more than 2,533 birds, n = 2). Data were collected during one year with five production periods. Survey method using structured questionnaire was to obtain primary data. Whereas, secondary data were provided by the farmer group and the related institution. Analysis data involved capital, production cost, revenue, profit, break-even point (BEP), R/C ratio, and rentability. Results discovered that the third production period of broiler duck farming in large-scale was the most profitable of IDR 8,207 per bird. It was IDR 22,520 of capital which structured by 8.02% of fixed and 91.98% working capital; IDR 20,715 of production cost that composed by 60.53% of feed and 27.52% of DOD; IDR 28,923 of revenue with consisting of 99.01% from the selling of live broiler duck and 0.99% from others (feed bags, manure and cardboard). Similarly, this farm represented the efficient broiler duck farming on the basis of IDR 21,796 of price BEP; 1.40 of R/C ratio; and 36.45% of rentability.

Keywords
Production cost, profitable, BEP, R/C ratio, rentability

Topic
Socio-economic aspects of animal farming

Link: https://ifory.id/abstract/uv8QP4tADLcY

Corresponding Author
Ellin Harlia

Institutions
Faculty of Animal Husbandry, Universitas Padjadjaran

Abstract
The laying hens livestock industry is growing rapidly along with the increasing demand for eggs for human consumption, will produce large amounts of waste. Improper management of laying chicken farm waste can interfere with health and environmental pollution including greenhouse gases (CH4, CO2, N2O), odor disorders, disturbances from rodent animals, disturbances of endoparasites and ectoparasites, pollution of water and soil sources. Appropriate waste management can reduce the risk of pollution of the laying hens industry to the environment. Utilizing feces of laying hens as a microbial consortium sources that serves as a biogas starter in anaerobic digester as an alternative environmental friendly energy source is an option. The purpose of this study was to obtain a bacterial and methanogen consortium from laying hens feces as a starter of biogas with coal media in anaerobic digester. The study used an experimental method of completely randomized design (CRD) with 4 doses and 4 replicates with 5 observations, data than tested further using orthogonal polynomials. The stages of the study included three stages: first, pretreatmen using in vitro technique; second, the adaptation process; third, addition starter of microbial consortium from the laying feces of the chicken into liquid media and coal at a dose of 0%, 5%, 10% and 15% then incubated at 39oC for 28 day. Observations were conducted every 7 days from day 0, day 7, day 14, day 21 and day 28. The parameters measured were the volume of biogas, the number of anaerobic bacteria and the composition of biogas. This biogas composition was analyzed by Gas Chromatography, the number of anaerobic bacteria cultured in Hungate tubes and calculated using the Ogimoto method. The observations showed that the number of bacteria ranging from 1012 CFU/ml up to 1013 CFU / ml exceeded the starter requirements of 107 CFU/ml.

Keywords
Microbial, Feces, Laying Hens, Biogas, Starter

Topic
General animal production and husbandries (ruminants and non-ruminants)

Link: https://ifory.id/abstract/wqyjKDaALk6t

Corresponding Author
Imam Setiaji Ronoatmojo

Institutions
1Faculty of Earth Technology and Energy, Trisakti University
Jl. Kyai Tapa No.1, Jakarta, Indonesia
2PT. Pertamina EP, Menara Standard Chartered No 164, Lt 16, Jl. Prof. DR. Satrio, Jakarta 12950, Indonesia
email address: aji.rono[at]trisakti.ac.id

Abstract
The tectonic mechanism is a mechanism that involves tectonic conditions in the area which affects the dynamics of poroelasticity. Elastic modulus in the porous medium will go through change along with fluid dynamics. The loading factor role in the tectonic mechanism is followed by the tectonic forces. The aim of this study is to learn the impact of a tectonic mechanism on the coupling ratio during production and water injection. The objective zone of this study is a part of the thrust fault regime, which is changed to be the strike-slip fault regime. The sand reservoir of Z-600 is in the transition condition so that the dominance of S_V and S_hmin has a strong influence on a coupling ratio change. The fluid dynamics occurring during this period are water injection and oil production. Observations were made on mechanical properties and pore pressure changes. The coupling ratio estimation starting from 1994 until 2017 refers to a historical production matching to demonstrate rock strength responses in the variation of existing tectonic regime positions. Mohr diagram analysis was done, based on the Coulomb failure criterion. It demonstrates that pore pressure change is not always equal to the change of stress difference or deviatoric stress change, due to the nature of irreversible porosity change during fluid dynamics. The horizontal stress might cause shear tensile failure, it initiates a sanding problem potential.

Keywords
tectonic mechanism, coupling ratio, rock strength, shear-tensile failure, sanding problem

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/m7XJzFp82kZt

Corresponding Author
Tri Wahyuningsih

Institutions
1 Metallurgical Engineering, Mining Engineering Department, Mineral Technology Faculty, UPN "Veteran" Yogyakarta, Jl. SWK 104 (Lingkar Utara) Condongcatur Yogyakarta 55283 Indonesia
2 Metallurgy Engineering, FTTM, Bandung Institute of Technology (ITB), Bandung 40132, Indonesia
3 Laboratory of Geomicrobiology, Biomining & Biocorrosion, Research Center for Bioscience and Biotechnology, Bandung Institute of Technology (ITB), Jln. Ganesha 10, Bandung 40132, Indonesia
a)Corresponding author: tri.wahyuningsih[at]upnyk.ac.id
b)skchaerun[at]metallurgy.itb.ac.id
c)esanwani[at]mining.itb.ac.id;

Abstract
Abstract: Several studies have been conducted on the benefits of bacteria to replace chemical reagents in the bioflotation process of copper sulfide minerals. Most of the processing of copper sulfide minerals is carried out by flotation by adding reagents. Flotation is one of the mineral processing processes to separate valuable minerals and their impurities, by utilizing different mineral surface properties. In copper sulfide minerals there is a high sulfur content of pyrite impurities (FeS2) which must be separated or depressed (become more hydrophilic) to be separated with valuable minerals, while valuable minerals will remain hydrophobic (prefer air). However, not all bacteria can survive at high sulfur concentrations. In this research characterization of the interaction of biosurfactant-producing bacteria that can survive in environments with high sulfur content (Citrobacter youngae strain SKC-4) with pyrite minerals. The effect of bacterial and pyrite interactions is observed by analyzing the composition of mineral surface elements and the morphological changes of the sample with SEM-EDS (Scanning Electron Microscope - Energy Dispersive Spectrometer) showing the interaction of bacteria that is able to stick and make mineral particles into complex aggregates and from the EDS results show that in the presence of bacteria are able to change the components of the initial mineral elements, this is dominated by the element components Fe, S, and a little content of element C which is the main element of microbial activity. Sampling for functional group testing (FT-IR Spectroscopy) was carried out on days 0,7,14, and 30 when bacteria interacted with minerals, showing a peak of C = O carbonyl bonds and carboxylic acid formation on the 7th day. The contact angle value of interaction culture with pyrite minerals results in a decrease on the 7th day, this causes the pyrite minerals to become more hydrophilic. From the results of the interaction characterization, the Citrobacter youngae strain SKC-4 has the potential as an alternative to a depressant reagent in a more environmentally friendly copper sulfide mineral bioflotation process.

Keywords
interaction, biosurfactant, pyrite, depressant

Topic
Mining and Metallurgy Engineering

Link: https://ifory.id/abstract/V6rQbU9kj283

Corresponding Author
Nur Aziz Sugiharto

Institutions
School of Postgraduate Studies, Indonesian University of Education, Bandung

Abstract
This study examines the influence of perceived service quality and perceived price on students- satisfaction and recommendation in higher education institution. Sample consists of 155 students who majority has learning in Poltekpos and STIMLOG of Bandung, taken by convenience sampling. The data was collected by survey with questioner method. Path analysis with Amos technique is statistical method chosen to measure influence of perceived service quality and perceived price on students- satisfaction for recommendation to others. The results indicate that perceived service quality has a significantly positive influence on students- satisfaction, but perceived price has negative influence on students- satisfaction. The result also indicate that students satisfaction has significantly positive influence on recommendation to others.

Keywords
Perceived service quality, perceived price, students- satisfaction, recommendation

Topic
Marketing Management

Link: https://ifory.id/abstract/DYgnwPBVdme9

Corresponding Author
Suryanto Suryanto

Institutions
Department of Business Administration, Universitas Padjadjaran

Abstract
This study aims to analyze the simultaneous and partial influence of Bank Indonesia (BI) 7 Day (Reverse) Repo Rate and inflation rate on the performance of money market mutual funds in Indonesia. The method used in this study is explanatory research with a quantitative approach. This study uses panel data regression analysis to determine the effect of BI 7 Day (Reverse) Repo Rate and inflation rate on the performance of money market mutual funds. Data is sourced from literature studies, observations, and interviews. The results of this study can be concluded that there are significant negative effects both simultaneously and partially from the BI 7 Day (Reverse) Repo Rate and the rate of inflation on the performance of money market mutual funds in Indonesia. This means that whenever there is an increase in the BI 7 Day (Reverse) Repo Rate and the inflation rate will cause a decrease in the performance of money market mutual funds in Indonesia.

Keywords
BI 7 Day (Reverse); Repo Rate; inflation rate; mutual fund; money market

Topic
Financial Management and Accounting

Link: https://ifory.id/abstract/K9rLXhc4WknA

Corresponding Author
Santoso Santoso

Institutions
School of Postgraduate Studies, Indonesia University of Education, Bandung

Abstract
This research evaluates the effect of Viral Marketing on changes in community behavior and the decision to use smartphones based on the Technology Acceptance Model. There were 100 questionnaires distributed to respondents who were active social media users seeking for information about smartphones. This research was conducted due to the phenomenon in the smartphone user community in Indonesia that considers smartphones as the fourth basic necessity in addition to clothing, food, and housing. This research employed a survey approach by applying questionnaires and statistical analysis, especially quantitative descriptive analysis using SmartPLS. The results showed that Trust had a strong influence on Perceived Usefulness and Behavioral Intention to Use. Social Norm had an effect on Perceived Usefulness and Perceived Ease to Use. Behavioral Control had an effect on Perceived Ease to Use and Perceived Usefulness. It is also seen that Be-havioral Intention to Use was strongly influenced by Perceived Usefulness.

Keywords
viral marketing, Social Norms, Trust, Behavior Control, Technology Acceptance Model

Topic
Marketing Management

Link: https://ifory.id/abstract/28aVgMvQJy93

Corresponding Author
Dani Leonidas Sumarna

Institutions
School of Postgraduate Studies, Universitas Pendidikan Indonesia, Bandung

Abstract
The purpose of this study is to determine the correlation of Brand Factor to Customer-Based Brand Equity from logistics courier company in Indonesia. This research is going to use partial least square (PLS) with sample data is obtained through online survey of 100 respondents who have experience with online shopping in Indonesia. This study indicates positive relationship between perceive value to customer-based brand equity; positive relationship between brand loyalty with customer-based brand equity; and positive relationship between brand awareness/ association with customer-based brand equity.

Keywords
Brand Factor, Customer-Based Brand Equity, logistic courier.

Topic
Marketing Management

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