Indonesia Conference Directory

Corresponding Author
Ary Arvianto

Institutions
Gadjah Mada University
Diponegoro University

Abstract
Many reported cases of city logistics in literature have been dominated by developed countries and the numbers of cases have significantly increased over time. On one hand, it is argued that the city characteristics in developed countries differ from those in developing countries. The different characteristics may lead to different problems and different approaches to solving the problems. This paper provides practices of city logistics in developing countries. The purpose of the present study is to identify the dominance factors, typical city logistics problems, and associated with the level of study in some developing countries. This paper describes literature-based research that has sought to understand the practices of city logistics in developing countries. The literature review process used a bibliometric analysis and followed by a systematic literature review to organize 118 papers relating to the concept and the practice of city logistics. We identify the weak consideration of aspects of stakeholder behavior in city logistics policy planning in developing countries is the dominant factor. Meanwhile, city logistics concepts and models in developing countries have been widely studied. Based on the classification, the typical problem or subject of city logistics that appears in developing countries is related to transportation networks, routing, loading and unloading systems, and collaborative planning. Many previous studies used an analytical, heuristic, and simulation approach to solve problems.

Keywords
city logistics, developing countries, urban freight

Topic
Industrial Engineering

Link: https://ifory.id/abstract/ewuD3GfMhKpW

Corresponding Author
N Nazaruddin

Institutions
Universitas Indonesia

Abstract
Abstract. Development of steering system has begun with manual steering, hydraulic power steering, and electric power steering. The current tendency of the steering system market is that electric power steering systems are increasingly in demand by consumers, which is inversely proportional to the other two, namely manual steering and hydraulic power steering which decrease sales. This is due to, among other things, mild operation and ease in the control system. Although for large vehicles each tends to use hydraulic power steering. University Indonesia has succeeded in developing a large type of electric car, the EV-Bus Molina UI. This bus uses a 200 kW main drive motor, for AC 15 kW, for a 4 kW compressor and 7.5 kW Power Steering. The Power Steering system used is Hydraulic Power Steering. Energy efficiency has reached a range of 60-80%. From the survey data about the use of electric power steering in large cars, neither ICE-BUS and EV-Bus systems have used electric power steering. Because of the superiority of Electric Power Steering, it will be converted from Hydraulic Power Steering to Electric Power Steering on the EV-Bus Molina UI. In this paper, we will explain about the existing dynamic motion equation models in electric power steering. Electric power steering uses a motor booster as a driver assist in driving the steering rod. The booster motor position on the electric power steering is in the steering column or on the steering rack. The booster position of the motor will affect the shape of the overall dynamic motion of the electric power steering system. In the beginning, the equation of the dynamic motion of the electric power steering system only involved a system of stiffness and inertia of the wheel drive, column steering, and tire, but further developments also involved viscous damping and friction of each of these components. The components involved in this movement are also increasing, namely rack and pinion, tie rod and drag link. This is due to the more accurate calculation of the torque needed by the motor booster and its control system. In large cars, the difference between city cars is the distance from the steering rod which is almost 2-3 times that of the city car, so the similarity of the motion will also be different. Stiffness equation is needed for the drag link mechanism structure which involves more stems combined between truss and frame. This is what distinguishes it later with the equation of the dynamic motion of the electric power steering system with the city car and its kind.

Keywords
motor booster, wheel drive, stiffness equation, large bus, steering system

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/KvcRXJyqxug4

Corresponding Author
Ilham Ardatul Putra

Institutions
Lemigas dan ITB

Abstract
The use of surfactant in chemical flooding techniques to increase the oil production has been investigated for several decades. However, the injection of surfactant is potential to be lost during the process due to the adsorption of surfactant into the core. It is therefore crucial to analyzed the concentration of surfactant before and after injection to the core. Many methods are developed for determining the content of surfactant using UV-Vis Spectrophotometer by utilizing the chromophore group of the chemical. However, for the analysis of a molecule that lack of this colour function, need to be developed using other techniques, such as mobile 1H NMR measurement. In this study, quantification of nonionic surfactant that absent of chromophore group was performed using a combination of mobile 1H NMR with Solid Phase Extraction (SPE). SPE was used to extract the samples that dissolved in water, whereas 1H NMR was used to identify the levels of nonionic surfactants that dissolved in deuterized solvents. Internal standard chemical was added to the sample to verify the concentration of samples. As a stationaty phase was SPE C-18 and eluent was methanol, ethyl acetate, and n-hexane. Furthermore, the SPE results were measured using mobile 1H NMR 43 MHz with selected solvents namely deuterized chlorophome (CDCl3) and internal standard Dimethyl Formamide (DMF). Optimization results for determination of surfactant concentration up to 0.5% w/w was using the C-18 stationary phase, mobile phase methanol, ethyl acetate, and n-hexane.

Keywords
Chemical Flooding, Nonionic Surfactant, Low field 1H NMR, Solid-Phase Extraction, C-18 Stationary Phase

Topic
Chemical Engineering

Link: https://ifory.id/abstract/ZXbT7JKmwcer

Corresponding Author
Ade Irman

Institutions
a) Industrial Engineering, University of Sultan Ageng Tirtayasa, Indonesia
*irman[at]untirta.ac.id
b) Industrial Engineering, University of Sultan Ageng Tirtayasa, Indonesia
**evi[at]untirta.ac.id
c) Industrial Engineering, University of Sultan Ageng Tirtayasa, Indonesia
***khasanahuswatun636[at]gmail.com

Abstract
Scheduling is defined as the process of allocating resources over time to perform a collection of tasks within a certain period of time. PT KHI Pipe Industries in Cilegon Indonesia, has been producing high quality longitudinal and spiral weld steel pipes, which is use for oil, gas, water and pile pipes. The company uses FCFS (first come first serve) rule for scheduling their jobs, which means that job processing based on the first incoming prioritizes orders. In October 2018 there was delay in their production, namely 1771 pipes are still in work in process (WIP) of total demand is 6,296 pipes. Based on these problems, this research tries to determine a better production scheduling by getting minimum makespan as scheduling performance. Heuristic and metaheuristic methods used in this research for minimizing the makespan, there are Campbell Dudek Smith (CDS) for heuristic and Particle Swarm Optimization (PSO) for metaheuristic. We also proposed a new heuristic algorithm for this problem. The results show the makespan of each method, there are CDS method: 742.87 hours, PSO method: 711.96 hours, Proposed Heuristic Algorithm method: 694.64 hours, and existing production scheduling of FCFS rules is 746.43 hours. Based on the results, the Proposed Heuristic Algorithm has smaller makespan than the others.

Keywords
Campbell Dudek Smith; Particle Swarm Optimization; Proposed A New Heuristic Algorithm; Makespan

Topic
Industrial Engineering

Link: https://ifory.id/abstract/xAGEyN3bLDF6

Corresponding Author
hayuni retno

Institutions
Universitas Negeri Malang

Abstract
This research aimed to identify the profile of Higher Order Thinking Skill (HOTs) instrument in the questions of students- learning outcome assessment in chemistry for Senior High School in Malang City. This study used descriptive qualitative with a content analysis method. The data were collected by documentation. The populations were all Senior High Schools in Malang City. The samples were determined using cluster random sampling technique and were represented by SMAN 3, SMAN 8, and SMAN 9 Malang. The data used in this study were 576 questions of learning outcome assessment in chemistry used in those three schools, including 201 question for class X and 366 question for class XI, respectively. The finding validity was tested based on the analysis results of rater 1 and 2 using interrater and Cohen-Kappa reliability. The research results showed that the HOTs questions had been implemented, and the percentages of HOTs questions used in class X and XI were 9.00% and 13.39%, respectively. The validity test indicated a strong-perfect interpretation with the agreement coefficient value of 0.61-0.86. The research results are expected to be an evaluation in improving the quality of education, especially in the chemistry for Senior High School in Malang City.

Keywords
Learning Outcome Assessment, HOTs, Chemistry

Topic
Chemistry Education

Link: https://ifory.id/abstract/24WqQTzuFJ8y

Corresponding Author
Restu Wigati

Institutions
(a) Civil Engineering Dept.,Universitas Sultan AgengTirtayasa,Cilegon 42435, Indonesia
*restu.wigati[at]untirta.ac.id
(b) Mechanical Engineering Dept.,Universitas Sultan AgengTirtayasa,Cilegon 42435, Indonesia
*hamdan_an[at]untirta.ac.id

Abstract
Flood problems become a crucial problem in the city of Jakarta. Jati Pinggir - Petamburan area is one of the affected floods. The density of the population and the narrower open land for water absorption causes the accumulation of standing water. The increased flow of water inundation affects channel capacity. For this reason, it is necessary to examine the ability to exist flood control buildings such as drainage canals, reservoirs and pump houses to deal with flooding with a 10-year return flood discharge in Jati Pinggir - Petamburan. Analysis of regional rainfall data, 10-year return period flood discharge, existing channel dimensions, the capacity of the pond and pump needs were used in this study.

Keywords
Jakarta floods, drainage, ponds, pump houses

Topic
Civil Engineering

Link: https://ifory.id/abstract/ZT87KdgU6vY4

Corresponding Author
Imron Rosyadi

Institutions
Universitas Sultan Ageng Tirtayasa

Abstract
The Indonesia Government is targeting the use of biofuel to be 30% diesel fuel and 20% bioethanol from the total needs of diesel fuel and gasoline by 2025. Diesel engine exhaust gas contains a lot of particulates because it is influenced by factors from fuel which is not clean. The addition of ethanol to diesel fuel is expected to provide a solution to reduce exhaust emissions from diesel engines. The 132 CC one cylinder diesel engine is used to test the effect of bioethanol addition on performance and exhaust emissions. The first research method was carried out by the fumigation method, namely the process of mixing diesel and bioethanol directly in the combustion chamber of a diesel engine. The second method is compared with Blending. High Speed Diesel (HSD) is mixed with bioethanol by adding surfactants that can emulsify water and oil to reduce the surface tension of the fuel. In this experiment it is divided into four variations, namely: for variation 1 pure HSD, variation 2 (93% HSD, 2% surfactant and 5% ethanol), variation 3 (HSD 88%, 2% surfactant and ethanol 10 %), variation 4 (83% HSD, 2% surfactant and 15% ethanol) and variation 5 Fumigation method (ethanol and HSD. The rotation speed of the 132 cc diesel engine was varied at rpm 1200, 1400, 1600, 1800, and 2000. Tests were carried out at the Performance Engine Laboratory and Mechanical Engineering Manufacturing Laboratory in Engineering Faculty Of Universitas Sultan Ageng Tirtayasa. The results of this research is The power is produced by ethanol and HSD greater than pure HSD fuel. Both the blend method and the fumigation method have high power. Blending of HSD and ethanol has an efficient specific fuel consumption (Sfc).

Keywords
Fumigation, blending, bioethanol, gas emissions

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/Z3gx9ET2uzUc

Corresponding Author
Daisman Purnomo Bayyu Aji

Institutions
Magister Program of Mechanical Engineering, Universitas Trisakti, Jakarta

Abstract
This study reports a Tool-Narayanaswamy-Moynihan (TNM) simulation on crystallized Zr60Cu25Ni5Al10 amorphous alloy. During a glass transition process, either on heating or cooling, parameters affecting a simulation results remain the same when the physical change during glass transition do not change. Here, we investigated the effect of crystallization fraction occurred on Zr60Cu25Ni5Al10 amorphous alloy after partially crystallized by heating the glassy alloy beyond crystallization temperature. The partial-crystallized samples are for 20 %, 50% and 80% crystals fraction. The results show that the non-linearity parameter, x, increases and the non-exponentiality parameter, β, decreases with higher crystals fraction of the crystallized alloy.

Keywords
Amorphous Alloy; Metallic Glass; Crystallization; Tool-Narayanaswamy-Moynihan; Glass Transition

Topic
Materials Science

Link: https://ifory.id/abstract/zucYRby2kE4V

Corresponding Author
Yeni Variyana

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

Abstract
Essential oil of lemongrass (Cymbopogon nardus) or Citronella oil is widely used in industry, especially pharmaceuticals and perfumes. The microwave assisted method was successfully applied in extracting fragrant essential oils on a laboratory scale of extraction, namely Microwave Hydrodistilation (MHD). MHD is a combination of hydrodistillation with microwave for extraction. The purpose of this research was to study several effects parameters (material size, ratio of feed to solvent volume and microwave power) on the yield of citronella oil obtained by the MHD method and to find optimal conditions using Response Surface Methodology (RSM). The results showed that the smaller size of the material, the lower the yield of oil obtained. Then, the smaller ratio of feed to solvents in the MHD method results in higher yields. While the greater the power, the higher the yield produced. The highest yield obtained for extraction using the MHD method are the material size of 0.5 cm, power 800 W and the mass ratio of feed to solvent volume 0.2 g/ml of 1.673% ± 0.0085%.

Keywords
Citronella oil; Cymbopogon nardus; Extraction; Microwave Hydro-Distillation

Topic
Chemical Engineering

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

Corresponding Author
Anistasia Milandia

Institutions
Department of Metallurgy Engginering, University of Sultan Ageng Tirtayasa, Banten, Indonesia

Abstract
Direct Reduction is one of the process to converted iron ore into metallic iron. The conversion of iron oxide into metallic iron occurs through saveral stages of intermediate phase. This intermediate phase included of hematite, magnetite and wustite. Iron ore direct reduction is the process involved high temperature it is because temperatures will provide heat energy. Sufficient heat energy will ensure all stages of converted phase completely reacted. To analize heat energy inside of the speciemen, Ansys software was utilized to simulated iron ore direct reduction process. This simulation using agglomerate spherical and cilindrical form. Temperatures simulation take place at 900 into 1100 Celcius for 30 and 69 minute. This simulation also simulated carbon monoxide (CO) as reduction gas at 1 atm.

Keywords
Iron Ore; Direct Reduction; Heat Energy;Simulation

Topic
Metallurgy Engineering

Link: https://ifory.id/abstract/mX4txbrMLPnR

Corresponding Author
Samuel Henrina Sundjaja

Institutions
a. Civil Engineering Department, Faculty of Engineering, Universitas Indonesia, Jalan Margonda Raya, Pondok Cina, Beji, Kota Depok, Jawa Barat 16424, Indonesia

Abstract
Estimating axial capacity of piles using Direct Method is still considered as a challenge these days. Estimation mainly achieved after construction is done and field method such as Static Load Test or PDA are used for calculating axial capacity of piles in real field conditions. This paper discussed estimation from 8 building project cases from Jakarta and Depok that have complete Standard Penetration Test data and field calculations (Static Load Test & PDA). The main objectives are to observe and correlate the results between every Direct Methods and field methods and to obtain which Direct Method is the most efficient to use for estimating axial capacity of piles in Jakarta area. Direct Methods that are used are Meyerhoff, Shariatmadari, Decourt, Aoki, and Robert. Calculation results showed that the most efficient standard penetration test method is that proposed by Decourt with average result of comparison between estimated axial capacity of piles and field calculation is roughly 1.03. The most underpredicted between every standard penetration test method is the one proposed by Aoki de Alencar with roughly 92% underprediction ratios and the most largest overpredicted method is proposed by Shariatmadari with roughly ratios of 56%.

Keywords
Standard Penetration Test; Axial Capacity; Direct Method; Field Calculations

Topic
Civil Engineering

Link: https://ifory.id/abstract/64e9bjfYRgE7

Corresponding Author
Lucky Wahyu Nuzulia Setyaningsih

Institutions
a) Department of Chemical Engineering, Islamic University of Indonesia, Yogyakarta, INDONESIA
*lucky.nuzulia[at]uii.ac.id

Abstract
This paper present the conversion of cellulose based on water hyacinth into hydrogel. The water hyacinth cellulose was prepared using acid-alkaline treatment and bleaching. The cellulose properties was optimized by varying the extraction condition such as solvent concentration and temperature. The analysis method of FTIR and XRD were used for characterizing the functional groups and crystallinity of cellulose. The effective condition of extraction were achieved at solvent concentration 17,5% w/w of NaOH, 8% v/v of H2O2 as bleaching agent and temperature of 80oC. The extracted cellulose was used to produced hydrogels using poly vinyl alcohol and glutaraldehide as crosslinker agent. The research revealed that adding of glutaraldehide with ratio 1:2 at 25oC give the highest water absorption capacity of 285%.

Keywords
Cellulose; Water Hyacinth; Gluaraldehyde; Hydrogel

Topic
Chemical Engineering

Link: https://ifory.id/abstract/8q6gkUzdebMC

Corresponding Author
Atmy Verani Rouly Sihombing

Institutions
1,2,3 Civil Engineering Department, Faculty of Civil and Environmental Engineering
Institut Teknologi Bandung, Indonesia
4 Research and Development Center for Road and Bridge, Ministry of Public Works and Public Housing, Indonesia

Abstract
This study investigated the use of bio-asphalt, derived from coconut shell (BioCS) and straw (BioST) as an additive to determine its benefits in asphalt mixtures containing reclaimed asphalt pavement (RAP). The study was conducted by determining and comparing the laboratory performance properties of four mixtures and the binders extracted from the mixes. The four mixtures evaluated in this study included 30% RAP mixtures with and without bio-asphalt (BioCS and BioST) and comparable virgin mix. The result showed that bio-asphalt was effective in improving mixture performance of 30% RAP mix close to those of the virgin mix.

Keywords
Bio-asphalt, Asphalt Mixture, RAP

Topic
Civil Engineering

Link: https://ifory.id/abstract/NA9dxLJfQuWj

Corresponding Author
Lucky Wahyu Nuzulia Setyaningsih

Institutions
(a) Department of Chemical Engineering, Islamic University of Indonesia, Yogyakarta, INDONESIA
*lucky.nuzulia[at]uii.ac.id

Abstract
The conversion of glycerol as by product of biodiesel manufacture into value-added product was studied. Esterification of glycerol with acetic acid to triacetin was carried out using activated zeolite and Lewatite as catalyst A selective method for triacetin synthesis was developed to investigate the effect of molar ratio of glycerol to acetic acid (1:6, 1:7 and 1:8). The conversion values at the reactant mole ratio were subsequently 66.91%, 73.36% and 73.16%, while the selectivity obtained was 7.67%, 9.66% and 10.61% respectively. From these results, it can be concluded that the highest conversion was obtained at a reactant mole ratio of 1: 7 and the highest selectivity was obtained at a reactant mole ratio of 1: 8. The result of selectivity with various catalyst type shows that the Lewatit catalyst produces a higher selectivity than the use of activated natural zeolite as a catalyst.

Keywords
Triacetin; Esterification; Lewatit; Zeolite; Selectivity

Topic
Chemical Engineering

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

Corresponding Author
Dwi Riana Aryani

Institutions
Universitas Indonesia

Abstract
The implementation of photovoltaic (PV) system has been evolving all over the world as the alternative energy sources are getting more required. However, the construction of PV power plant on the ground would need a large space. In regions which are lack of sites for the ground PV installation, a floating PV system is one of the solutions. This study analyses the performance of floating PV in supplying power to loads with a battery as the energy storage in a stand-alone system. The system is simulated using small capacities of PV module, battery, and load, where all components are integrated using a solar charge controller to maintain a safe operation. The performance of floating PV is compared to the ground PV in terms of the output efficiency. One can notice that the floating PV provides better efficiency compared to ground PV as the cell temperature is maintained well.

Keywords
Floating PV, stand-alone system, battery, output efficiency

Topic
Electrical Engineering

Link: https://ifory.id/abstract/uUNJDcRqp9BH

Corresponding Author
Medyan Riza

Institutions
(a) Department of Chemical Engineering, Universitas Syiah Kuala, Jl. Tgk. Syech Abdul Rauf No.7, Banda Aceh 23111 Banda Aceh, Indonesia
*medyan_riza[at]unsyiah.ac.id
(b) Laboratory of Industrial Computation and Optimization, Industrial Engineering, Universitas Syiah Kuala, Jl. Tgk. Syech Abdul Rauf No.7, Banda Aceh 23111 Banda Aceh, Indonesia
(c) Department of Chemical Engineering, Universitas Malikussaleh Lhokseumawe, Indonesia

Abstract
Optimization is a method of finding variable values that are considered optimal, effective and efficient to achieve the desired results. The experiments were conducted to determine the relationship between response variable and independent variable and the effect of independent variables to response variable. Multiple comparison tests can be used to find the level that makes optimal response. The purpose of this study was to apply the surface response method (Central Composite Design) to obtain optimum process variable conditions in the manufacture of biodegradable plastics. The fix variable in this study were 10 grams of tapioca starch, gelatinization of temperature 69-79oC and total mixture weight (base) consisting of starch, poly (NIPAM)-chitosan, citronella oil, 2% acetic acid and water (100 grams). While for the independent variable is composition of chitosan (0.35%; 0.45%; and 0.55% of total weight), composition of glycerol (1.5%; 2.5%; and 3.5% of total weight) and composition of lemongrass oil (0.25%; 0.35% and 0.45% of total weight). The response variable is tensile strenght and break of elongation for each biodegradable plastic sample made. The application of this response surface method can be used to obtain an independent variable that makes the optimal response variable.

Keywords
Biodegradable Plastic, Tapioca Starch, Poly(NIPAM)-Chitosan, Lemongrass oil, Response Surface Method

Topic
Chemical Engineering

Link: https://ifory.id/abstract/BQ6RjWFUGJ8a

Corresponding Author
Punnatorn Mathong

Institutions
Supply Chain and Logistics System Research Unit, Department of Industrial Engineering, Faculty of Engineering, Khon Kean University, Khon Kaen 40002, Thailand

Abstract
The assessment of service quality has received intensive attention over the past few decades. Many tools have been proposed for being used to quantify the level of service quality. SERVQUAL, which divides the term “service quality” into five dimensions (Tangibles, Responsiveness, Reliability, Assurance, and Empathy), is one of the most commonly used tools. However, SERVQUAL is not designed to be instantly implementable in every industry or business sector, but question items belonging to each dimension need to be adjusted to suit their specific characteristics. This study aims to develop the assessment tool, based upon SERVQUAL, particularly for the beverage transportation service. The process started by gathering assessment items from relevant literature. The selected items were modified to suit the beverage logistics industry, and they were then classified into the five dimensions. After that, the validity of the items was confirmed by asking three industry experts to check whether the questions were appropriate and understandable for customers. Next, six experts were asked to provide Item-Objective Congruence (IOC) scores for quantitative validity testing. Subsequently, the adjusted questionnaire was distributed to 29 samples in order to test its reliability, through the Cronbach-s alpha values. The final version of the questionnaire can be used as an effective tool for assessing the quality of service for beverage transportation service providers.

Keywords
Service quality assessment; SERVQUAL; Logistic service provider; Beverage transportation; IOC method

Topic
Industrial Engineering

Link: https://ifory.id/abstract/6w4kMqDnUEgz

Corresponding Author
Dwi Novi Setiawati

Institutions
Sultan Ageng Tirtayasa University Faculty of Engineering, Civil Engineering Department

Abstract
Sudimara Station is one of the stations located in the city of South Tangerang. This station   belongs to the 3rd class train station, with the growth rate of passengers driving private vehicles   increasing by approximately 2.2 % to 3.2% every year. Most of passengers who drive their personal   vehicles choose to park in the parking area provided by the station. The aim of this study was to know the characteristics of parking activity on weekdays   and holidays, and also to know the parking needs at this time land the next five years. This study used   survey method with primary data obtained through direct survey that recorded the vehicles that come out   and enter the parking area, so it can be known the duration of the vehicles that were parked. The   secondary data obtained from PT. Reska Multi Usaha and PT. Kereta Api Indonesia. The data analysis   in this study was based on the planning and operating guidance of parking facility 1998. The results of the study showed that both the north and sout parking areas, with the highest  parking characteristics, occurred on weekdays, where the north parking area has an area of 3,538 m2 with  parking capacity for two-wheeled vechicles 314 SRP and four-wheeled vehicles 105 SRP and the south  parking area has an area of 3,617 m2 with parking capacity for two-wheeled vehicles 137 SRP andfour-wheeled vehicles 158 SRP. The current insufficient parking requirements are only two-wheeled vehicles   in the northern parking area, it is 29 SRP deficiencies, while for the next 5 years, parking requirements   based on the current parking characteristics for two-wheeled vehicles in the northern parking area still   lack of 68 SRP and on the southern parking area still lack of 17 SRP, but for the four-wheeled vehicles,   the avaibility of two parking areas are now still sufficient for parking needs for the next 5 years.

Keywords
Parking Characteristics; Parking Needs; Station

Topic
Civil Engineering

Link: https://ifory.id/abstract/7j96ZDngCVPG

Corresponding Author
yeni muriani zulaida

Institutions
Metallurgy Department, University of Sultan Ageng Tirtayasa, Jl. Jend Sudirman KM 3,5, 42435, Cilegon, Indonesia

Abstract
Making aluminum product use recycling beverage aluminum cans can reduce the cost of metal production compared to the primary process that starts from the smelting process. One of the manufacturing methods used to recycle aluminum waste is the casting process. Usually, the problem with castings is that they are not homogeneous in the as-cast due to segregation. So that in this study a homogenization process on recycling aluminum castings will be carried out to obtain more homogeneous mechanical properties and microstructure. Variables that influence are heating temperature and holding time during the homogenization process. In this research, the heating temperature used ranges from 500 C to 600 C, and the holding time used is 2 to 4 hours. The optimum condition in this study will obtain if mechanical properties, such as tensile strength and hardness, uniform at any castings location

Keywords
Aluminum, homogenization, recycling, beverage aluminum

Topic
Metallurgy Engineering

Link: https://ifory.id/abstract/whF8LvX9nGKx

Corresponding Author
Vivi Alvionita Sari

Institutions
(1) Departement of Chemical Enginering, Institut Teknologi Sepuluh Nopember
(2) Departement of Chemical Enginering, Institut Teknologi Sepuluh Nopember

Abstract
Molasses, Stillage or vinasse and Spent wash are large liquid wastes production in the bioethanol industry that contain high sulfur. This liquid wastes are dangerous if it discharges directly into the environment without pretreatment. For this reason, pretreatment is needed to reduced the sulfur concentration of liquid waste (molasses) using biofiltration method. The objective of this research is to eliminate the content of H2S or sulfur in the wastewater of the bioethanol industry (molasses) by using aerobic bacteria such as Acidithiobacillus thiooxidans dan Pseudomonas putida. The method of this experimental work used biofiltration which are attached on wood chips by aerobic bacterial to form biofilms in the reactor. The process in this study was conducted in two steps. The first step was carried out by sulfur oxidizing bacteria such as A.thiooxidans and P. putida with a concentration of 10% and 20% (v/v) that growth on packing to form biofilms in the reactor for 13 days. Furthermore, as the second step the bacteria degraded H2S content of liquid waste with attached bacteria on packing for 15 days in biofiltration reactor. From the preliminary results of this study, reactor with 10% (v/v) A. thiooxidans on wood chips packing and 3% (v/v) concentration molasses waste can degraded H2S from 4.35 mg/L to 1.55 mg/L (64.37% removal efficiency) and for reactor with 20% (v/v) A. thiooxidans can degraded H2S from 4.35 mg/L to 1.16 mg/L (73.33% removal efficiency). Meanwhile, reactor with 10% (v/v) P. putida can degraded H2S from 4.35 mg/L to 1.94 mg/L (55.40% removal efficiency) and for reactor with 20% (v/v) P. putida can degraded H2S from 4.35 mg/L to 1.47 mg/L (66.21% removal efficiency).

Keywords
Acidithiobacillus thiooxidans, Biofiltration, Molasses, Pseudomonas putida, Wood chips

Topic
Chemical Engineering

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

Corresponding Author
Christian Julius Wijaya

Institutions
(a) Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Sepuluh Nopember, Keputih Sukolilo, Surabaya 60111, Indonesia.
(b) Department of Chemical Engineering, Widya Mandala Surabaya Catholic University, Kalijudan 37, Surabaya 60114, Indonesia.
*gunawan[at]chem-eng.its.ac.id (S. Gunawan)

Abstract
Due to its hydrophilic tendencies, the modification of cellulose nanocrystals (CNC) is needed for applying in hydrophobic drug delivery system. The CNC are chosen as a potential drug carrier because it is safety for consumption and cannot be digested by human. Previous studies have investigated several modification agents, such as hexadecyltrimethylammonium (HDTMA) and cetyl trimethylammonium bromide (CTAB), to enhance the hydrophobicity of the CNC. Natural surfactants, such as rarasaponins (RS), are suitable to avoid the human health and environmental problems caused by the use of the previous modification agents. In this work, RS were attached to the surface of CNC from bamboo shoots (BS) by hydrogen bindings. The OH peak of the CNC/RS showed the higher lever compared to the initial CNC in the FTIR analysis. The initial concentration of RS and the temperature were studied to obtain the best condition of the modification process among the variables studied. Both variables have significances toward the q as the response, where is proven by the p-value less than 5%. The highest amount of linked-RS on the CNC (q) as big as 203.81 mg/g was obtained at a RS initial concentration of 2000 ppm and a temperature of 30C.

Keywords
cellulose nanocrystals, hydrophobicity, rarasaponins, surface modification

Topic
Chemical Engineering

Link: https://ifory.id/abstract/XGBMzQ8dveUc

Corresponding Author
Dwi Riana Aryani

Institutions
Universitas Indonesia

Abstract
Disturbances which commonly occur in electric power system such as loss of generation may affect the frequency stability. Hence, in order to maintain the stability, a load shedding is carried out by analyzing the reactive power and triggering the circuit breaker through frequency relay. Analysis of the reactive power is used to determine the location of the loads that will be released. The objective of the methodology is to minimize the loss of load while maintaining the frequency stability of the system. Four scenarios are employed in this study in accordance with the quantity of generator trip. As a result, the proposed method is able to minimize the amount of loss of load ranging from 18 MW to 35 MW with the frequency recovery time is less than 30 seconds.

Keywords
power system stability, frequency stability, load shedding, frequency relay, islanding

Topic
Electrical Engineering

Link: https://ifory.id/abstract/fLgAVZ4neHKq

Corresponding Author
Rahma Gautami

Institutions
a) Student Master of Public Policy, Airlangga University, City of Surabaya, Indonesia
*rahmagautami[at]yahoo.com
b) Lecturer of Public Administration Program, Airlangga University, City of Surabaya, Indonesia
*gitadi.supramudyo[at]fisip.unair.ac.id

Abstract
This research is based on reality that Regional Staffing Body (BKD) in staffing area was less optimum in providing service to civil servant causing a need to improve apparatus resource quality to make professional apparatus. It is evidenced by inequality staffing in almost all Regional Apparatus Task Force (SKPD) in Nganjuk Regency. Therefore, this research tried to answer question of how does Regional Staffing Body performance in Nganjuk Regency in PNS (Civil Servant) transfer in Nganjuk Regency. Theoretically, this problem was explained using performance theory perspective by Sedarmayanti about performance measurement instrument that include work performance, skill, behavior and leadership. Research method used was qualitative descriptive by determining key informant performed through purposive in the data collection process. Data were collected from ten informants consisting of four informants from sub-division of mutation/transfer and six informants from civil servant who ever been transferred in 2011-2012. Research result indicated that employee Regional Staffing Body of Nganjuk Regency in implementing mutation policies Civil Servant Transfer in Nganjuk Regency not good enough has been by influence for element subjective factor and politic/power factor in implementing. Beside there is analyze position corresponding performance, map position, and a list of employee vacancies and staffing not appropriate of educational backgrounds.

Keywords
Performance; Mutation; Civil Servant

Topic
Human Resource Development

Link: https://ifory.id/abstract/MbuRXAJ4gU2w

Corresponding Author
ANINDA ADISTYANA DEWI

Institutions
Postgraduate Airlangga University

Abstract
An abstract is a brief summary of a research thesis determine the legal consequences that occur from the act of seizure by the State of the object of fiduciary guarantee in terms of the according concept of Rahn in Islamic law and review of Law Number 42 year 1999 about Fidusia-s result. The following types of research are normative juridical sources from primary legal material in the form of regulations that discuss the theory of rahn concepts and secondary legal material in the form of books relating to the discussion with the conceptual approach and the statue approach. Data were analyzed qualitatively logically and systematically descriptive. The results of the analysis resulting from primary and secondary legal sources explain that there are cases of seizure of objects of fiduciary collateral by the State that occur due to criminal acts committed by the debtor making the legal status of the fiduciary guarantee erased or destroyed, but not removing the principal agreement and insurance claims. Murtahin has the right to demand rahin to continue to carry out its obligations, namely to pay off its debts by making efforts to reschedule the receivables with a mutually agreed time period. The legal effort that can be taken by both parties is that it can use the non-litigation efforts by deliberation and if no agreement is reached then the settlement can be through the Religious Courts.

Keywords
Deprivation; Rahn; Fiduciary guarantee.

Topic
Law, Police and Forensic

Link: https://ifory.id/abstract/QPaptqbFJDY7

Corresponding Author
mohammad yusron sholikhin

Institutions
a. Student of the Master of Science in Islamic Economics, School of Postgraduate, Universitas Airlangga
b. Department of Islamic Economics, Faculty of Business and Economics, Universitas Airlangga

Abstract
The development of Islamic banks in Indonesia growth significantly. This evidence has been almost 30 years of Islamic banks in Indonesia with various achievements. This condition becomes a great time to measure the performance of Islamic banks in Indonesia. Profitability is a measuring instrument used to measure the performance of Islamic banks. This study aims to examine the effect of Non-Performing Financing (NPF), inflation and exchange inlaid against Islamic bank profitability from 2008 to 2018. The method used is multiple linear regression analysis. Based on the analysis it is concluded that the variable Non-Performing Financing (NPF) and the exchange rate has a significant influence on the profitability of Islamic banks, while inflation has no significant effect on the profitability of Islamic banks in Indonesia.

Keywords
Non Performing Financing (NPF), Inflation, Exchange Rate, Profitability

Topic
Social and Economic Issues

Link: https://ifory.id/abstract/YhVFXeZtU96x

Corresponding Author
Nadya Adinda Putri

Institutions
Faculty of Psychology. Airlangga University, Surabaya, Indonesia

Abstract
The purpose of this study to see the effectiveness of the little champs in the gross motoric improvement of children aged 5-6 years. The activities on Little Champs more explores playing in groups (Draper, Achmat, Forbes, & Lambert, 2012). Based on the Achievement Goal Theory whose main goal is to develop new abilities, try to understand the task, increase the level of competence by using the TARGET structure (Bub, Palmer, & Robinson, 2016). This study uses a semi-experimental approach. The subjects were 20 students of Mardi Putera Surabaya Kindergarten aged 5-6 years. The research design uses the single group pre-test post-test. Data retrieval uses observation techniques. They were treated for 5 times in the form of gross motoric activities carried out in groups. Each group consists of four students. The results of this study are expected to gross motor skills associated with locomotor activities; jumping and climbing lines. controling objects; throwing and kicking can increase.

Keywords
Gross motor; Achievement Goal Theory; Little Champs

Topic
Education, Community Engagement

Link: https://ifory.id/abstract/VNAQGMuBWz6D

Corresponding Author
Thathit Bimo Tangguh Setiogung

Institutions
(a). Forensic Department of Airlangga University Surabaya
(b). Forensic Department of Soeroto Hospital Ngawi

Abstract
Drowning events occur when a person sinks into a liquid which is sucked through the airway and then goes into the alveoli of the lungs. Diatome is a water plant that is inhaled into the alveoli when the victim sinks. The certainty of drowning in a sinking body that has not decayed will be found diatome on the examination of lung sap. Examination of lung sap is no longer effective on decomposed bodies. The discovery of a diatome in a decomposing body in the femur bone marrow will greatly help diagnose the person drowning or not. The type of diatome found in the bone marrow of decayed bodies which was examined later compared to the diatome found in the place of the corpse was found. This has an important meaning in determining whether the corpse died drowning in the place where the body was found or died elsewhere. In this case the diatome was found in the examination of acid destruction in the femur bone marrow, the victim drowned in the brantas river which strengthened the proof that the body died by drowning.

Keywords
Diatome, Decayed bodies, Sinking victims

Topic
Law, Police and Forensic

Link: https://ifory.id/abstract/h2jeuHCV9KfN

Corresponding Author
AA Sg Weni Kumala Ratih

Institutions
a) Professional Clinical Psychology Master Students, Dept. Psychology, Airlangga University
b) Lecture and Clinical Psychologist, Dept. Psychology, Airlangga University

Abstract
Strategies for handling depression in divorced young adult has been scarely reported. Classical clinical evidences and international guidelines recommends psychotherapy management strategies, such as the cognitive behavioral approach, works well in handling and releasing from depressive conditions. The present case report aims to document and disseminate the treatment outcomes of the usefulness of Cognitive Behavioral Therapy for depression in reported case of a divorced young adult women. A brief clinical single case based report on the clinical manifestation, psychological assessment, therapeutic formulation and psychotherapeutic process on divorced young adult women (39 year old), diagnosed as DSM-V, with mild depression with somatic symptoms with onset usually occuring in young adulthood, referred to clinical psychologist for management. Based on a comprehensive psychiatry history taking, psychological assessment, and therapeutic formulation, Cognitive Behavioral Therapy for Depression (Miltenberger, 2008), was offered by professional psychology clinical master stundents guided by trained licensed clinical psychologist. Psychotherapy was given in 10 sessions, 60 minutes for each session within 5 weeks, and a follow-up of 3 monts. Symptoms were monitored for change by the therapist on 2 outcomes measures: Depression Anxiety Stress Scale and behavior observation during the process therapeutic. Clinical significant change (50% or above) based on pre- and post-therapy data scores on outcomes measures were used to assess the efficacy of the therapeutic intervention. Result indicate the intervention was effective for depression in a divorced young adult women. The challenges faced by the therapist in sensitive socio-cultural and limited client time, are discussed below.

Keywords
depression, divorce, young adult women, psychotherapy, cognitive behavioral therapy, case report

Topic
Health and Medicine

Link: https://ifory.id/abstract/qhrcVzDxkGv2

Corresponding Author
Ratna Devy Winayanti

Institutions
Magister Psikologi Profesi
Fakultas Psikologi
Universitas Airlangga

Abstract
The purpose of this study was to understand the influence of work engagement towards the caring performance of nurse. Caring is the essence of nursing, but nurses has not been able to carry out professional caring behavior to patient. Caring performance of nurse is specific behavior of the nursing profession, which is characterized by ten carative factors provided by nurses while providing services to patient. Work engagement is a positive, fulfilling, work-related state of mind that is characterized by vigor, dedication, and absorption. This study is quantitative research with work engagement as independent variable and caring performance of nurse as dependent variable. This study was conducted in 68 nurses currently work in Bali. Measuring instruments used in this study was UWES from Schaufelli, et.all (2003) which is translated into Bahasa for work engagement and caring performance of nurse scale from Istiqomah (2018) for caring performance of nurse. Data were processed using simple regression analysis. Result from the data analysis showed R square = 0.160 (p<0.005). Determination coefficient 0.160 indicates that the effective contribution of work engagement to the caring performance of nurse amounted to 16.0%. The conclusion of this study was that work engagement has influence caring performance of nurse in low category. Work engagement contributes to improving performance because individuals who have work engagement tend to experience positive emotions, experience better health, create their own jobs and personal resources, and transfer their attachments to others.

Keywords
caring performance of nurse, work engagement, nurse

Topic
Human Resource Development

Link: https://ifory.id/abstract/kKHEpgd79wje

Corresponding Author
Yande Prayoga

Institutions
a) Magister Profesi Psikologi, Universitas Airlangga. Kampus B UNAIR - Jl. Airlangga 4-6, Surabaya, Indonesia

*yande.prayoga-2015[at]psikologi.unair.ac.id

Abstract
The foundation is one of the non profit organizations that has charitable and social goals. The characteristics of the organization can influence employee motivation in interpreting their work. This study aims to explore the meaning of the work of employees who work in Non-Profit Organizations. This study used a qualitative approach to one of the HIV / AIDS foundations in Surabaya. This research is an case study using semi-structured interviews involving two informants and determined purposively sampling. This study uses thematic analysis by Boyatzis (1998) with data driven, using the theory of the meaning of work Harpaz and Meshoulam (2004). The results of this study indicate that the two subjects have fulfilled the meaning of work in the form of calling. Both subjects interpreted the work to produce financial and career benefits, but looked more at work as a means to meet their needs as human beings.

Keywords
meaning of work, non-profit organization, foundation, employee

Topic
Human Resource Development

Link: https://ifory.id/abstract/ZrAKTvRxu64Q