bluuebunny/crossref_metadata_2025 huggingface dataset:
Layout Design in Group Technology Using Cellular Manufacturing System
Authors: Ernawati D , Rahmawati N , Pudji E , Sari NK , Wianto A
Published: July 2020

The facility layout problem is one of the design problems involving the assignment of facilities (e.g., machines, departments) to planar region (e.g., a plant) so as to achieve the objectives such as to minimize the cost of projected interaction between facilities or to maximize the closeness rating, etc. Layout has a significant role on the efficiency of manufacturing systems. This research use Cellular Manufacturing System to solve the layout design problem. Selection of this method because Cellular Manufacturing is an flexible alternative solution for complex and automated manufacture tools. Component movement and total distance can be reduced. Cellular manufacturing system have a philosophy that similar component identified and grouped to take advantage from similarity. By study result, manufacture cell grouping reduce total distance from 411.51 m to 335.14 m.
Characterization of Soyghurt Synbiotic Drink From Soymilk and Purple Yam Extract
Authors: Rosida  , E Amalia E , Djajati S
Published: July 2020

The production of synbiotic drink from soy milk and water am filtrate had been studied. Synbiotic is a combination of probiotic and prebiotic components. Synbiotic product is usually found on fermented drink product, such as soyghurt. Prebiotic components of water yam, such as soluble dietary fiber and Inulin, can stimulate selective growth activity of lactic acid bacteria of fermented drink. The aim of this study is to develop diversivy healthy drink based on locally food resources. This research used Completely Randomized Design with factorial pattern cosisted of 2 factors and 2 replications. Factor 1 is the proportion of soymilk:water yam extract (50:50, 60:40, and 70:30) and Factor 2 is the addition of skim milk (5%, 7,5% and 10%). The observed data were analyzed by Analysis of Variance, and if there are significant differences, the data were analyzed by Duncan’s Multiple Range Test. The study revealed that the best treatment is the proportion soymilk:water yam extract (50:50) and 10% of skim milk addition, which produced synbiotic drink with total lactic acid bacteria 10.44 log CFU/ml, pH 4.11, lactic acid content 1.18%, soluble protein content 0.78%, and soluble dietary fiber content 0.21%,
Biomechanical Modeling: How Much Punching Operators’ Moment of Force in Punching Process
Authors: Annisa Rullie
Published: July 2020

One of the causes of injuri is operator work and machine that is not ergonomic. On SISCO, usage the length of the handle of the punching tool which is made of iron becomes one of problems in the punching process. The manual punching process requires great energy and strength. This causes operators complaints during the production process include hand and arm muscular pains. One of the ways to minimize pains, injuries, and accidents is using biomechanical approach. The method used in the biomechanical approach is using biomechanical modeling Single-segment Static Model. In the study obtained, the calculations of moment of force at the initial position of palm, forearm and upper arm generated values of 14.7175 Nm, 29.5236616 Nm and 32.1110157 Nm, while moment of force at the final position of palm, forearm and upper arm generated values of 34.2256666 Nm and 37.396405 Nm. The calculations of moment of force at the initial and final positions indicate that the distance of arm influence the moment of force; the longer the arm length, the bigger the moment of force produced.
Rework Reduction and Quality Cost Analysis of Furniture Production Processes Using the House of Risk (HOR)
Authors: Winarso Kukuh , Jufriyanto Moh.
Published: July 2020

Quality is one of the important factors that makes a company survive in the industrial world. PT. X maintains the quality of its products by conducting quality tests on all products that will be sent to consumers. Although the quality test has been carried out on products, there are still consumers who receive defective products. To reduce product defects, a risk management approach is carried out. Risk management is a method in which organizations can identify problems with a comprehensive and systematic management approach. The method used in this study is Seven tools and House of Risk (HOR). Phase 1 of the House of Risk (HOR) method used to search for risk agents must be prioritized by looking at the value of Aggregate Risk Potential (ARP). Furthermore, the ARP value is used as input for House Of Risk phase 2 to find mitigation strategies that can be applied in the company. Based on the identification of risk events there are 24 risk events in the production process and there are 21 causes of risk (risk agents). The causes of risk that must be prioritized are 10 causes of risk with the highest ARP value of 2699, ie the operator ignores the SOP. So that the causes of risk must be prioritized for improvement. based on the analysis of the quality costs is repair product costs or rework product cost, it is focused on two products is Crb 10123-31 and Crb 01143-79 Ns.
Virtual Enterprise for Batik’s Small Medium Enterprises
Authors: Novianti Trisita
Published: July 2020

This study discussed virtual enterprise in Batik’s Small Medium Enterprises (SMEs). The capacity of SMEs in accessing potential markets was a problem that often faced. There were many SMEs, which have not been able to export products overseas. They only sold their products in the domestic market. Marketing promotion was the cause of recognition and capabilities lacking. In this study discussed about E-commerce for SMEs which applied Business to Business (B2B) and Business to Consumer (B2C). This research used several tools for modelling processes which were represented by Use Case Diagrams and Activity Diagrams. The results of this study were the form of an enterprise virtual model that was applied become E-commerce. This e-commerce implemented B2B in two levels of admin system, which were super admin managed by the cooperative service and ordinary admin managed by several local SMEs. The virtual enterprise model, which implemented business to costumer, could be seen through the form of shopping transactions or online trading on websites
Design of the mBatik, textile hot wax applicator to emulate hand drawn batik using CNC plotter machine and characterization of wax plotting parameters
Authors: Akhmad Sabarudin , Arendra Anis , Mu’alim  , Winarso Kukuh , Hidayat Rachmad
Published: July 2020

Hand drawn textiles wax dyeing process (batik tulis) has been known as the cultural heritage of Indonesia. Batik is the process of pattern coloring on fabric using selective wax coating as barrier to dyes. The encouragement of industrial revolution 4.0 concurrently with efforts to preserve Indonesian cultural heritage has motivated this research to design the mBatik, a hand drawn batik machine, a touch of advanced technology for Indonesian batik tulis traditions. the mBatik consists of a CNC plotter sub-system and a textile hot wax applicator sub-system as an automatic canting. The development of machine design and virtual prototype testing was done using the Inventor application. Continued by fabricating the 3D model components of the mBatik machine using a 3D printer and manual assembly of the mBatik machine. The characterization of the waxing process on the fabric was explored using this machine. The characterization concluded that the thickness of the wax line(Y) was significantly affected by the heating power(X

1
) and wax filling volumes(X

2
) with the linear regression function of Y = -0.07007 + 0.01637 X

1
+ 0.00805 X

2
and the R square value of 0.9526.
Building a Smart and Intelligent Factory of the Future with Industry 4.0 Technologies
Authors: Mubarok K , Arriaga EF
Published: July 2020

Manufacturing industries are facing new market challenges driven by high demand for personalized products and shorter product lifecycle. To cope with these challenges, a wide range of advanced Industry 4.0 technologies such as the Internet of Things (IoT), big data analytics, and artificial intelligence (AI) have been adopted to improve the capability and effectiveness of manufacturing processes. Consequently, the new research field towards smart and intelligent manufacturing paradigm needs to be defined. Besides, only implementing new methodologies and technologies is inadequate. There is also a need to trigger the skilled workforce and manufacturing engineer’s competency through education and training. This paper discusses the transformation of manufacturing paradigm, correspondence research topics, and identifies the essential skills required.
Pressure Loss on Corrugated Annulus of Double Pipe Heat Exchanger
Authors: Sunu Putu Wijaya , Made Suarta I , Anakottapary D S , Tri Putra I D A , Indrayana I N E
Published: July 2020

Fluid flow performances were performed as preliminary research on double pipe heat exchanger with longitudinally corrugated. In this experiment, the annulus tube is geometrically design and form of alternating groove. This experiment using longitudinal grooved pipe as inner tube of double pipe heat exchanger. The objective of this investigation is to determine the pressure loss along the pipe as a time series function. The fluid mechanics analysis of in this paper also provide pressure drop of system and presenting pressure signal. The longitudinal grooves were incised on outer surface of tube side with number of longitudinal grooves of 2. 0.3 mm high and 1 mm width grooves were kept constant. The tube made of aluminium with outer diameter is 20 mm. The shell is made of acrylic which has 26 mm in internal diameter. The hot fluid flows in tube space and the cold fluid flows in the annulus space of double pipe heat exchanger. Counter flow scheme use in this experiment with water as working fluid. The volume flowrate of cold fluid was varied from 11 lpm up to 15 lpm which is equal to Reynold Number (Re) range around 31981 up to 43610. The other hand, the volume flowrate of hot fluid remains constant at 15 lpm which is equal to (Re) around 30904. Pressure data was recorded using differential pressure tranducers and digitalize using data logger. The corresponding comparison of the pressure drops revealed the corrugated double-pipe heat exchangers had 5.2 % larger pressure drop. The grooved-double pipe heat exchanger has more disadvantage on fluid performance since the thin corrugated area are slightly increased which essentially correlation on larger pressure drop.
Investigating pump cavitation based on audio sound signature recognition using artificial neural network
Authors: Arendra Anis , Akhmad Sabarudin , Winarso Kukuh , Herianto
Published: July 2020

How to investigate the occurrence of cavitation in the pump? Several studies have shown the sound characteristic that occurs during cavitation. This research attemps to build a pump cavitation detection system based on the audio signal of the operating pump. Audio signal is recorded using a microphone through a computer sound card. Then perform the frequency domain feature extraction and the correlation analysis for feature selection. From this process, 9 frequency domain features are selected as the artificial neural network classifier input. This artificial neural network classifier is trained with the Resilient backprogation algorithm The performance of this detection system is able to determine the existence of cavitation with an accuracy rate of 82.5%.
Analysis of HOTS Type Multiple-choice Test Items on Learning Automotive Electrical Systems in SMK Dharma Bahari Surabaya
Authors: Soeryanto  , Arsana I M , Hidayatullah R S , Ariyanto S R
Published: July 2020

This item analysis study aims to describe the quality of HOTS type multiple-choice test items who compiled for the learning automotive electrical systems. The type of this research is document analysis. Analysis of the data used in this study is about the content validity, reliability, level of difficulty, differentiating power, and the effectiveness of detractors. The result showed that: (1) the validity of the contents of the questions are in the valid category with a percentage of 55%; (2) reliability is in the high category with a coefficient value of 0.79 or a percentage of 79%; (3) in the level of difficulty the questions are more dominant in the easy category with a percentage of 53%; (4) the differentiating power of the questions is more dominant in the good category with a percentage of 30%; and (5) most of the questions have deceptive effectiveness that works very well with a percentage of 32%.
Performance analysis of forced convection coolers using synthetic jets with variations in altitude from synthetic jets to heat sources
Authors: Muslich Muchammad Baihaqi , Rhakasywi Damora , As’adi M , Cholis Nur
Published: July 2020

Every electronic device has a disadvantage that is heat generated from the components contained in the device while operating. The heat that occurs during the process can affect the effectiveness of these electronic devices. The cooling fan is directed to a heat source from an electronic device with the aim of maintaining the device’s performance temperature. However, the cooling fan used still has some disadvantages in terms of dimensions. Therefore, research on synthetic jets is carried out as an innovation in cooling. This study aims to find wave characteristics as a source. Optimum frequency selection to support cooling. As well as the ideal height of synthetic jets to heat sources. The method used in the research is direct and computer-based data retrieval for CFD. The use of triangular waves as a source of cooling with a frequency of 80 Hz at an altitude of 8 cm can reduce rapidly. However, the lowest final temperature comes from a height of 2 cm which is 28.1 °C.
Mefenamic acid treatment to ward follicles development and progesterone level
Authors: Aminah S , Lutfiasari D , Prasetyanti D K , Fitriasnani M E
Published: July 2020

Mefenamic acid is anti-inflammation non-steroid, which can hamper prostaglandin synthesis in the body tissue by hampering the siklooxigen enzyme. The purpose of this research is to find out the influence of Mefenamic acid toward the follicles development and progesterone level. This research is an experimental laboratory method. The subject of the research divided into five groups randomly selected and have been homogenized — one group as a control group and others as an experimental group with various dosages of Mefenamic acid treatment. The data is analyzed using a one-way Anova test. The results of this research are confirmed the significant difference of Grafian follicles, yellowish corpus luteum and progesterone level as the influence of Mefenamic acid. While there was no significant difference in tertiary follicles development. The decrease of corpus luteum is caused by Mephenamic acid activity to hamper the prostaglandin synthesis in the body tissue by hampering the siklooxigen enzyme. The prostaglandin can make follicles swelling and cause follicles fracture and make ovulation. The granulosis cell will make corpus luteum, which secreted progesterone hormone. Mefenamic acid was proven to avoid ovulation that blocked the formation of yellowish corpus luteum resulting in decreased blood progesterone level.
Detecting Text in the Scene Text Image Using Fast Fourier Transform
Authors: Nahari R V , Putro S S , Setiawan N , Alflta R
Published: July 2020

Text in images express a lot of information for image understanding. Detecting and recognizing text facilitates many important applications. The characteristics of a text with different shapes and contour patterns require special computer vision to detect and recognize when compared to other objects in the image. Text detection is the process of detecting text in an image followed by surrounding text with a rectangular bounding box. It can be performed by using image-based or frequency-based techniques. Many applications require text detection in images ranging from automatic detection of traffic signs that help in the transportation system to assist blind people and others in need. The data of this study were Focused Scene Text with the JPG format. The method used to detect the text in images was Fast Fourier Transform (FFT). The final results of the study showed that 95% of the text could be detected in an image by various camera perspectives and was expected to help develop text recognition applications in an image.
Signal Classification and Electromyography (EMG) Instrumentation Design as Basic Electronic Control System
Authors: Ulum Miftachul , Rozi Fatkur , Ibadillah Achmad Fiqhi
Published: July 2020

Human body naturally contains complex electrical signals ranging from the mechanism of the brain, heart, and muscles. Electromyography (EMG) is the development of biomedical engineering devices used to record electrical signal activity produced by muscles. The signal produced by the muscle has a very small amplitude, therefore, an amplifier circuit is required to read the signal using microcontroller. In this study, EMG signal amplification was carried out periodically to reduce errors that might occur if only charged to one signal amplifier. Signal reading was performed by conducting 5 different basic hand movements. Muscle signal activity during relaxed conditions had an amplitude of 0.05 V. Moreover, it conveyed an amplitude of 0.27 V up to 2.62 V with a signal gain of 10.350 when the muscle did different movements. The K-NN algorithm was used to classify EMG signals and determined the hand motion output used as a basic electronic control system. Results showed success rate of 88%. Failures when carrying out basic electronic control was due to the signal classification processes that had not met the parameters and the signal amplitude that was almost similar to another signal.
Automatic Clean Water Treatment System Using The Sugeno Fuzzy Method
Authors: Hanif S , Rahmawati D , Alfita R , Awal A S , Doni A F
Published: July 2020

All Water is the most important source in the human body, healthy water can help the metabolic processes in the body perfectly. Water used by humans must be in accordance with those set by the government (Permenkes RI number 492 of 2010, regarding the requirements and supervision of water quality). Clean water according to regulations issued by the government through the Indonesian Ministry of Health is having a PH value of 6.5 - 8.5, TDS (Total Dissolved Solid) a maximum of 500 mg / L, and a maximum turbidity level is 5 NTU (Nephelometric Turbidity Unit). In the process of managing dirty water into clean water, it must be done carefully so that the germs in the water are completely gone and the people who use them are free from all diseases. From the problems above, a clean water management system has been created. This system can read the value of water suitable for use or not. Water condition readings using PH sensor, TDS (Total Dissolved solid) sensor and turbidity sensor (TSD 10). Data values from the sensor (input) are processed using fuzzy method as a logic to start the pump if the water value does not match the set point specified and display the sensor value on the LCD (Liquid Cristal Display). The results of the whole system were obtained an average error for the sr-HC04 sensor 1%, turbidity 2.12%, the TDS sensor 2.40% and the pH sensor 0.48%.
Design of Children Monitoring Application for Outdoor Activities Using a Smart Watch
Authors: Indrayana I N E , Sutawinaya Putu , Wirasyanti N M , Swardika I Ketut , Sunu Putu Wijaya
Published: July 2020

The background of this research is the increasing of criminalization in children, one of which is kidnapping of children, Meanwhile many parents have to work so they don’t have enough time to be always close to their children. The purpose of this research is to develop applications that can help a parents to monitor the movements of their children’s outdoor activities. The application uses a smart watch to get the child’s GPS position and at the same time the device sends the last position of the child to the firebase database server. Parents can monitor the child’s movements through the android smart phone device in realtime. The application design uses several UML (unified modeling Language) diagrams namely use case diagrams, activity diagrams and squence diagrams. This application requires data objects including parent, child, family and child’s position (latitude and longitude). The main use cases in this application are sending position, case view, child location on map and view path of moving each child. The application can run only if there is an internet connection and the child uses smart time.
The Smart Islands Vision: Towards Smart City Readiness in Local Government of Archipelagos
Authors: Arief A , Abbas M Y , Wahab I H A , Latif L A , Abdullah S D , Sensuse D I
Published: July 2020

Today, the smart city has become a trend in the world and in the city’s governments in Indonesia. The typical geographic condition of the city, municipality and district government in Indonesia is more directed to the governance of island governments that have own factors, challenges and opportunities. One of the visions of the archipelago’s government is the Smart Islands vision, which is to make the islands become a smart city with connected islands, integrated, collaborations between stakeholders and improved public services with own local wisdom. However, the readiness level, the actual problems found in the existing conditions are not yet evaluated and measured. In this study, we conducted a smart city readiness assessment with the adoption of the Nusantara Smart Government Model (NS-GM), which was combined with the Model SPBE instrument on Presidential Regulation No. 95 on 2018 as the official regulation of the Indonesian government. We choose 2 case studies as an example of an archipelago’s government in Indonesia, namely Ternate City and district’s government of Southern Halmahera because the area has the criteria as a government of an island region that has a vision of smart islands. Smart cities readiness assessment results show that 2 case studies that are measured in readiness, are generally still in the pilot stage with values in the 2 towards 3 phase model that we used.
Effect Electrolyte Temperature and Electrode Distance to Electroplating Hard-Chrome on Medium-Carbon Steel
Authors: Yusron R M , Bisono R M , Pramudia M
Published: July 2020

ASSAB 618S steel is a type of medium carbon steel that is often used as a machining tool for the petroleum industry. Based on the observation, it does not work optimally due to high acidity. As a result, there is corruption in the machining tool. In this study, an electroplating process will be carried out as a way to overcome corrosion in machining made of ASSAB 618S steel. The variables involved independent variables, dependent variables, and control variables. The independent variable is the temperature of the electrolyte solution with variations of 55°C to 70°C. The dependent variable is the corrosion rate on the results of electroplating hard chrome coating. The controlled variable is the distance of electrodes with variations of 3 and 9 cm. The data obtained showed that the highest corrosion rate was obtained from the temperature variation of the electrolyte solution of 55 degrees Celsius and the electrode distance of 9 cm, while the lowest corrosion rate was obtained at a temperature variation of 70 degrees Celsius electrolyte and 3 cm electrode distance. The data is in accordance with the theory of corrosion rate that is smaller better. It means that the smaller the corrosion rate, the better the corrosion resistance. Based on the results of this study, it can be concluded that the temperature of the electrolyte solution, the distance of the electrode, and between both interactions give an influence on the corrosion rate of the electroplating hard chrome coating.
The Effect Of Extrusion Machine Againt Consistency Filaments Products 3D Printing
Authors: Faisal Rony Azmi
Published: July 2020

The need for filaments is currently increasing but the prices offered in the market are very expensive. This research develops a new extruder machine with HDPE material. The high quality filaments are characterized by high durability and constant diameter. The variables used in this research are temperature, screw speed, towing speed and blower. Based on ANOVA processing using Minitab it is known that all variables have no effect on the uniformity of diameter and ovality response. Based on the results of this research that the bottle cap tensile strength (HDPE) has a value of 15.7 so that it is still far below the PLA tensile strength.
Split tensile and flexural strength of concrete with artificial lightweight aggregate (ALWA) and steel-fiber
Authors: Wulandari M , Sofianto M F , Tavio
Published: July 2020

In this study, ALWA made from Styrofoam. Styrofoam is reprocessed by adding acetone solution. The use of acetone is to form styrofoam into harder grains so that it resembles coarse aggregates so that they can be used as substitutes for coarse aggregates in concrete mixtures. Hooked type steel fibers are also used as additives in this study. Steel fibers used are 0%, 0.75% and 1.5% of volume concrete while for the composition of ALWA Styrofoam were 0%, 15%, 50% and 100% for split tensile strength testing, respectively. Concrete composition for flexural strength testing is the optimum composition of the tensile strength test results. The results showed concrete with a mixture of 15% ALWA Styrofoam and 1.5% steel fiber was able to produce optimum split tensile strength, the most optimum tensile strength testing of 5.29 MPa and for the flexural strength test results of 9.47 MPa at maximum load. Addition of steel fibers with a mixture of ALWA Styrofoam is able to make concrete to be more resistant to cracking and more ductile.
Sustainable Flood Prevention Using Interconnection of House Pump System
Authors: Kusnan  , Suryaman Heri
Published: July 2020

The Unesa Ketintang Campus in Surabaya City is in lowland with an altitude between 3-4 m above sea level. Every rainy season arrives in this area frequent flooding. Puddles that occurred in 2013 with a long pool of ± 4 hours. Efforts have been made in 2014 to tackle flooding by raising paving pairs in open fields and roads and making reservoirs of ± 0.6 ha in the Unesa Ketintang Campus environment, normalizing the channel and installing pump houses to support the process of accelerating the reduction of standing water happen. However, still standing water (2014, 2015, and 2016) with a pool of ± 2 hours. The condition of the campus location which is lower than the condition of the surrounding area causes waterlogging and flooding in the study area. This study proposes a flood mitigation model using interconnection of the pump house system to reduce waterlogging, accelerate the water flowing process, and still optimize the operation and function of existing reservoirs. Water pump interconnected Pump House P1 to P8, namely: Unesa I Water Pump House (P1) functions to drain water from the campus area to reservoir campus, then in Unesa II Water Pump House (P2) serves to drain water from reservoir campus, which is flowed south towards the Wonorejo Primary channel through the Water Pump House (P3) and partially forwarded to the north of the Kalimir Jagir Water Pump House (P4), while eastward to drain water from the Wonorejo Primary channel to the Jemursari Prapen Water Pump House (P5 ) serves to help drain water from the Wonorejo Primary channel towards Jagir River, the Water Pump House Wonorejo I (P6) has a capacity of 8.9 m ^ 3 / sec to accelerate the flow of water to the Water Pump House Wonorejo II (P7), Pump House Water Wonorejo II (P7) is used to accelerate the flow towards reservoir Wonorejo, and the reservoir Wonorejo Water Pump House (P8) serves to accelerate the flow of water to reservoir Wonorejo to be forwarded to the sea. Interconnection of the water pump system is able to overcome waterlogging and inundation problems.
Analysis of The Mechanical Properties of Concrete Beams That Use Pumice as a Partial Substitution of Concrete Mixtures
Authors: Gaus Abdul , Imran  , Anwar Chairul
Published: July 2020

One of the most common inhibiting factors in the archipelago is the lack of availability of material resources and human resources. One of the options is the use of lightweight concrete precast using materials around the islands. The local material which is widely distributed in North Maluku is pumice but it has not been used maximally because so far it has only been used as pile material. This study aims to analyze the effect of partial substitution of pumice on fine aggregate in a concrete mixture. This research was carried out experimentally in a laboratory using UTM and divided into 2 stages. Stage 1, designing and analyzing concrete mix using pumice compared without using pumice, Phase 2 testing using concrete beam dimensions of 600x150x100 mm with an inter load of 150 mm. Beam test results show that the limited use of pumice in a concrete mixture does not greatly affect the strength of normal concrete beams, as indicated by the deflection value and strength of concrete blocks that are almost as large.
Material And Form Resilience in Dutch Architectural Style Buildings in Ternate (case study: Ternate nobleman’s house)
Authors: Harisun Endah
Published: July 2020

The material resilience and shape of Dutch buildings in Indonesia is very famous. This is evidenced by the establishment of buildings in the present. The resilience of material and shape of Dutch buildings was also found in noble homes with typical Colonial architecture in Ternate which was the object of research. The research method used is descriptive by comparing data in the field with literature studies and explaining elements in buildings such as walls, floors and frames. The conclusion that was achieved knew the resilience both in terms of building material and the shape of a house building with colonial architectural style in Ternate
Mode Choice Modelling For Interisland Transportation in North Maluku
Authors: Hakim Raudha
Published: July 2020

This research discusses to study and to analyze speedboat and Fast Boat users on the Ternate-Sofifi route and seeing preferences for choosing mode changes in travel costs, trips, itineraries and frequency of trips. The research activity carried out publishes the initial survey and the main survey through the distribution of questionnaires prepared by the method stated a preference. This research was conducted on 120 respondents and collected as many as 98 who met the requirements (valid). These questionnaires were distributed during field surveys directly on port speedboats and fast boats in the city of Ternate. The results of the questionnaire were further processed to obtain the characteristics of respondents and the model of a quick ship and speedboat ship mode selection. The purpose of the trip is mostly official travel for quick ship users and family / social needs for speedboat users. While the reasons for choosing the crossing, mode are considerations for quick ship and frequency reasons for speedboat ship users. Mode selection models between quick ship and speedboat ship obtained in the form of linear equations are: UQ sho - US1 sho = - 4,356 - 0.00000787X1 + 0.545X2 + 1,275 X3 - 0.067X4. With 4 attributes, they are: X1 = Travel expenses., X2 = Travel time X3 = Travel schedule and X4 = Frequency of Reception. Results Measurement of the percentage of all attributes (R2) obtained a value of 42.7%.
Reaction Kinetics The Formation of Calcium Sulfate From Cow Bone And Sulfuric Acid In Batch
Authors: Pujiastuti C , Ngatilah Y , Septianto M , Tantyono A
Published: July 2020

Cow bone is one type of solid waste that has not been utilized. This waste materials, contains a lot of calcium phosphate. When reacted with sulfuric acid it will form calcium sulfate. The research aimed to find the speed constant value of calcium sulfate formation reaction from cow bone powder with batch sulfuric acid. A 200 mesh cow bone powder is dissolved in water to form a saturated solution. This saturated solution was taken as much as 500 ml then reacted with 4 N sulfuric acid as much as 100 ml, stirred with stirring speed of 200 rpm, with temperature and time according to the variable being run. After reaching the studied condition, the filtrate is separated by its sediment. The precipitate was analyzed for the content of calcium sulfate. The variables studied in this study were reaction temperature (65°C. 75°C, 85°C, 95°C, and 105°C) and reaction time (15, 25, 35, 45, 55 and 65 minutes). The results showed that the reaction follows a pseudo first order reaction, obtained by the equation k = 3.09 e -9735.5/T.
Vinasse Treatment With Aerobic Microbial Method Using Activated Sludge
Authors: Utami I , Kautsar D B , Akbar R F
Published: July 2020

Vinasse liquid waste in this study obtained from the ethanol industry which has organic load of COD of 202,232.14 mg/L and BOD of 32,911.47 mg/L. Aeration is used to operate the activated sludge process unit to remove BOD from wastewater in the aerobic microbial method. The research was conducted by conditioning 3L of vinasse wastewater at pH 7 by adding 1 N NaOH, then the acclimatization process was carried out for 24 h using activated sludge with concentration of microorganisms is 13.578 gr/L and 5 L/min of air flow rate in the aeration tank. The processing of vinasse wastewater 3L at pH 7 was carried out on the addition of acclimatized activated sludge microorganisms with quantity 13,578 through 40,734 mg and aeration times in the range of to 2 through 10 h. Removal of organic matter from vinasse waste by activated sludge can be associated with the growth of microorganisms. The results showed that the addition of 40,734 mg of microorganisms for 8 h of aeration obtained the COD removal of 69.273 %, and BOD of 96.652 %.
The Mathematical Analysis of the Drying of Cassava Grater by Using Pneumantic (flash) Dryer with Heat Recirculation Method
Authors: Wijaya Rizza , Hariono Budi
Published: July 2020

The abundance of cassava cultivation production in Indonesia needs to be balanced with the use of cassava itself to be a source of alternative food as rice subtitute. In this research was done the drying of tubers grater which was cassava to be dried into flour. This drying used a mechanical dryer which was a pneumatic (flash) dryer by using the heat recirculation method (the heat produced from drying was reused). The drying in this research was carried out with a variation of 2 air openings, which were openings for air speed (blower) and openings in the heat recirculation pipe. For openings in the blower, this research used 2 variations of openings, which were openings 50% (air speed 0.0603 m/s) and openings 75% (air speed 0.0768 m/s). For openings in the recirculation pipe, 4 variations of openings were used, which were openings 0% (without recirculated the heat), openings 25% (the heat returned was only 25%), 50% and 75%. The drying time was based on how long the material was in the duct drying. The results showed that, by doing heat recirculation, the value of heating and drying efficiency would increase. The drying in air recirculation 25% could increase the value of drying efficiency for about 5-6%, while in air recirculation 50% could increase the efficiency value for about 3-4%. The value of the heating efficiency of this research ranged from 57-86%. The drying rate constant of the cassava grater moisture content ranged between 0.16 to 0.194%/second.
Edge detection of digital image with different edge types
Authors: Ruslau M F V , Pratama R A , Meirista E
Published: July 2020

In digital images processing, there are three types of edges based on intensity changes. Namely, step edges, ramp edges and edges noise. An edge is defined as a set of pixels where there is an abrupt change in colour intensity over distance. On-ramp edges where gray levels change slowly, the Gradient Method is able to detect better. On step edges where the intensity or gray levels changes very quickly the Laplace method is able to detect better than the Gradient Method. In this study, three images were used as samples and identified the type of edge of each image. Furthermore, edge detection is performed with the first derivative operator Canny and the second derivative operator Laplacian of Gaussian. The results indicate that for step edges LoG provides better results, whereas for ramp edges Canny detects better. However, by selecting the right threshold that matches the σ (standard deviation), Canny is also capable to provide good edge detection results. The greater the σ value, the threshold was chosen must be small so that the results obtained are good and easily interpreted. The Canny operator produces a thinner edge and a firmer boundary between objects and between objects on the given sigma = 1 value while the LoG operator corrects better, especially on the steep part of the value σ = 2 compared to the value σ = 1.
Realistic mathematics education assisted interactive multimedia
Authors: Fredy  , Rahayu D P , Natsir I
Published: July 2020

This study aims to improve student achievement through the application of realistic mathematical education assisted interactive multimedia. This research used classroom action research, carried out in two cycles. Each cycle consists of planning, action, observing, evaluating and reflecting. The stages of implementing learning begin with the delivery of concrete examples of integer problems, making concrete models up to formal forms of mathematics about integers. The results showed the percentage of students who met the minimum completeness criteria of 71.87%. After improving learning in cycle 2, there was an increase in student achievement of 28.13%. The percentage of students’ achievement in cycle 2 has reached 100%.
Cellulolytic Fungi Isolation and Identification from Fermetoge, Cattle Feed Composed of Fermented Water Hyacinth (Eichhornia crassipes) And Corn (Zea mays) Cob
Authors: Isnawati  , Ni’matuzahroh  , Surtiningsih T
Published: July 2020

Fermetoge is fermented feed produced from fermentation of water hyacinth and corn cob mixture, commonly used as cattle feed in East Java, Indonesia. Fermetoge is composed of these cellulose-contained materials easily degraded by cellulase enzymes produced by fungi during fermentation. This study was aimed to isolate fungi from Fermetoge and screen their ability in degrading cellulose. Ten fungi isolates were found from fermetoge, three out of which indicated high cellulolytic activity. The three of them were identified based on partial ITS 1 and ITS 4 gene sequencing as Rhizophus stolonifer, Aspergillus fumigatus, and Penicillium sp., with similarity level of 95%, 100%, and 89% respectively. Isolation and identification of fungi from fermetoge can give insight into cellulose-degrading fungi species to be studied for further developing starter culture and improving the quality of starter-base fermented feed.
Preference swiftlet bird (Aerodramus fuciphagus) nesting at different sites in an effort to increase nest production
Authors: Kuntjoro Sunu , Rachmadiarti Fida
Published: July 2020

Nest sites were used special place of swiftlet bird. Nest of swiftlet bird are usually dificult to reach place. This study want to know the potential for nest sites in a swiftlet bird house. Four types of different nest sites were installed at nesting and roving room, made by wood, bamboo, aluminium, concreate at the swiftlet bird house. And then, the breeding swiftlet birds using the different nest sites type were recorded during the breeding season for finding the effectiveness of four different nest sites type. Nest-site with the different material were installed using materials made of wood, bamboo, aluminium and concrete. The resulats were that 25 % (n=6) for wood material, 41.66% (n=10) for bamboo, 29.66%(n=7) for aluminium and 4.16% (n=1) for concrete From this result, the breeding swiftlet bird showed preference for better better bamboo material for nest-site when there were abundant in nesting room 83%(n=20)
Scaffolding computer packet instruction (SCPI) to analyze student’s problem solving performance on physics
Authors: Nikat R F , Henukh A , Simbolon M , Reski A , Sari D K
Published: July 2020

The development of technology could facilitate individuals to access information, solve problems and communicate. This physics education research, the author wants to convey the impact of utilization quantitatively and qualitatively scaffolding of computer packet Instruction (SCPI) on students’ problem solving performance. SCPI learning packet consists of material, Check your knowledge, feedback and evaluation buttons. The research method used is a mixed method embedded design. The participants in this study were 32 students in class X MIA 1 ISLAM PUJON SMA MALANG. Students consist of 10 male and 22 female. The study was conducted in the even semester of the 2017/2018 school year with topics of work and energy topic. Quantitative data analysis through calculation of N-gain test, effect size test and paired t-test. Based on Quantitative analysis results, the use of SCPI media could have a positive impact on students’ physics problem solving performance. This result is supported by data on the increase in pretest and posttest values. The statement was also supported by students ‘responses in filling out the online questionnaire that there was an increase in independent learning capacity after SCPI was implemented in the concept of solving students’ physics problems.
The effect of impact velocity to the reaction force, the deformation length and the deformation mode on a thin aluminum tube
Authors: Hardi Witono
Published: July 2020

Many people have conducted research related to the thin tubes as energy absorbers. The response of the specimens when receiving axial loads at low-velocity impact and high-velocity impact has been carried out by many researchers. In this study, the effect of impact velocity on the response of specimen reaction forces and the factors that influence on thin aluminum tube specimens with fixed impact energy will be examined.

The specimen used in this research is a thin aluminum tube with an outer diameter of 32 mm and a thickness of 1 mm with a length of 120 mm. The axial force is the impact of the impactor steel with varying mass adjusted to varying velocities with a fixed impact energy of 785 Joules. The response of reaction force from specimens, maximum deformation in each specimen and deformation mode was observed at each increase of impact velocity. Modeling of the experiment is prepared by the Finite Element Method using the ANSYS 19 Academic Version.

The results of the study confirm that the higher the impact velocity on fixed energy, the greater the maximum reaction force. On the other hand, the smaller the maximum deformation. In general, there is a change in deformation mode, which is non-axisymmetric at low speeds and axisymmetric at higher speeds. The axisymmetric deformation mode affects the maximum deformation to be smaller, and the maximum reaction force becomes more significant at fixed energy. In this study, it was found that at an increased impact velocity of 140 m / s to 150 m / s there was a change in deformation mode from non-axisymmetric to axisymmetric.
Addition turmeric extract on ration to reduce fat deposit of broiler
Authors: Utami M M D , Dwiani H P , Agus A.
Published: July 2020

The purpose of this research was to investigate the effect of turmeric extract in ration to reduce fat of broiler. Ninety-day old chicks randomly divided into five treatments: T1 is group received basal diet (control), T2 (0.02% of turmeric extract); T3 (0.04% of turmeric extract); T4 (0.06% of turmeric extract), and T5 (0.08% of turmeric extract). Each treatment consists of three replications and each repetition consist of six chickens. This research using a completely randomized design. The parameters of research were carcass weight, abdominal fat weight and the percentage of abdominal fat. The result of this research showed that turmeric extract had significantly effect (P<0.05) to increase carcass weight (T1: 1476,7 g; T2: 1503,8 g; T3: 1577,0 g; T4: 1633,7 g; T5: 1605,0 g), to reduce abdominal fat weight (T1: 34,33 g; T2: 30,69 g; T3: 27,03 g; T4: 26,96 g; T5: 25,92 g) and the percentage of abdominal fat (T1: 2,33%, T2: 2,04%, T3: 1,72%, T4: 1,65%, T5: 1,63%). The result showed addition turmeric extract on ration increased carcass weight and decreased abdominal fat weight and the percentage of abdominal fat.
Microgreen Quality of Broccoli Plants (Brassica oleracea L.) and Correlation between Parameters
Authors: Widiwurjani  , Guniarti  , Sari N K , Andansari P
Published: July 2020

Micro greens are vegetables harvested at a very early age, harvesting is done when cotyledon leaves and a pair of new leaves appear. Plant growth phases include germination, micro greens, baby greens, and mature in greens. This research aimed to determine the quality of microgreens broccoli (Brassica oleracea L.) that are water content, total chlorophyll, and dietary fiber due to the influence of planting media and coconut water nutrition. Broccoli microgreens are planted at the Green House of the Faculty of Agriculture, UPN “Veteran” East Java in November-December 2018. Analysis of water content using drying method(thermogravimetri), chlorophyll analysis using spectrophotometry method, and analysis of fiber content with Enzymatic-Gravimetric method. The data were analyzed using Completely Randomized Design (CRD) with the post hoc test LSD 5% and HSD 5% and correlation regression between parameters. The results of the study showed an increase in the quality of parameters and there was a close correlation between parameters. Correlation value of water content and total chlorophyll (r = 0.81) with a regression equation y = 1.907 × - 143.2, water content and fiber content (r = 0.84) with regression equation y = 2.628 × - 235.3 and total chlorophyll and fiber content (r = 0.88) with the regression equation y = 1.178 × - 32.05.
Identification of Acetoin Producing Rhizobacteria as Rice Plant Growth Control (Oryza sativa) from The Rhizosphere of Elephant Grass Plant (Pennisetum purpureum) using Gas Chromatography Mass Spectrometry (GC-MS) and Scanning Electron Microscope (SEM)
Authors: Adrianus
Published: July 2020

The compound of acetoin (3-hydroxybutan-2-butanone) is a volatile compound produced by bacteria that functions as a booster for plant growth or as a biostimulant. Acetoin plays an important role in stimulating the process of organogenesis (morphogenesis) plants so that the formation of plant organs faster and faster plant growth. Besides being able to increase the growth of acetoin, it can also induce plant resistance, increase the formation of branches, roots and flowers so that acetoin can increase plant productivity. The purpose of this study was to identify acetoin-producing rhizobacteria which can stimulate rice growth. Identification of compounds was carried out using Gas Chromatography Mass Spectrometry (GC-MS) and Scanning Electron Microscope (SEM). This study obtained one rhizobacterial isolate capable of producing acetoin which acts as a plant growth booster, namely Rg21. This rhizobacterial isolate was able to increase the number of lateral roots of rice seedlings at the age of 14 days after plants with a percentage increase of 50.00% when compared to controls.
The Efficiency of Rawa Mayo Irrigation Channels in Kurik Sub-Distrik, Merauke
Authors: Permadi MG , Parjono
Published: July 2020

The purpose of this research is to know the efficiency of irrigation networks and water loss Swamps the Mayo that occurred during the distribution of irrigation. Research methods used in this research is a research field that is by calculating the discharge of water channels, perkolasi, evaporation and seepage. The research results obtained average discharge early in the primary channel of 0.292 m3/s, the final discharge 0.25 m3/s, the loss of water, 0,042 m3/s and the efficiency of irrigation of 85,62%. On the secondary channel 1 average early discharge 0.268 m3/s discharge, 0.153 m3/s end, water loss of 0.115 m3/s and irrigation efficiency of 57,08%. On the secondary channel II early 0.22 m3/s debit, debit end 0.118 m3/s, water loss of 0.102 m3/s and irrigation efficiency of 53,63%. Irrigation efficiency at Mayo swamp irrigation is 46.39% where the value still meets the KP-01 (2013) Irrigation planning standard.