bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical analysis of one dimensional heat transfer on varying metal
Authors: Mahardika D P , Haryani F F
Published: June 2020

Heat is an energy that we often encounter in our daily lives. Heat can be transferred from one medium to another, such as a solid medium. Heat transfer in a solid is called heat conduction or diffusion. Numerical analysis is one approach used to solve differential diffusion in many cases. In this paper, the concern is the proposed finite difference method to simulate one-dimensional heat transfer on varying metals. This numerical method utilizes the Neumann boundary conditions as well as the Taylor series in finding differential diffusion solutions. The solution obtained was applied and simulated in the case of heat transfer by conduction on various metals. From this simulation, we can obtain data in the form of temperature distribution across various metals by adjusting to boundary conditions. Then, the distribution is used to predict when various metals reach their equilibrium temperature. The final equilibrium temperature on varying metal must satisfy Thermodynamics Law. In order to illustrate the accuracy, the varying boundary conditions are presented. The results obtained in the form of temperature distribution will be simulated with the help of the MATLAB program to obtain conclusions from the objects of this paper. The conclusion indicates that using finite difference is accurate in some boundary conditions.
Bivariate zero inflated generalized Poisson regression model in the number of pregnant maternal mortality and the number of postpartum maternal mortality in the Central Java Province in 2017
Authors: Aini Q , Purhadi  , Irhamah
Published: June 2020

Excess zero is one of the problems in Generalized Poisson regression where the number of responses is contained zero exceeds 60 percent. One of the statistical methods have been developed is Zero Inflated Generalized Poisson Regression (ZIGPR). If there are two response variables, the appropriate regression analysis is Bivariate ZIGPR (BZIGPR). This study aims to determine the factors that influence the number of pregnant maternal mortality and the number of postpartum maternal mortality in 91 sub districts in Pekalongan Residency, Central Java Province 2017 through by the BZIGPR. The variables are percentage of K1 pregnancy examinations, percentage of K4 pregnancy examinations, percentage of deliveries assisted by health workers, percentage of pregnant women who received Fe3, percentage of TT2 + immunization in pregnant women, ratio of midwives per 100,000 population and percentage of obstetric complications management. The estimation of BZIGPR parameters using the Maximum Likelihood Estimation (MLE) method which results in a non-linear form so that, it is solved by the Berndt Hall-Hall Hausman (BHHH) iteration method. The result hypothesis testing using the Maximum Likelihood Ratio Test (MLRT) is reject null hypothesis. BZIGPR produces 2 regression models ln

μ
^

l
i

and logit

p
^

l
i

. The predictor variables that affect response Y1 and Y2 on model ln

μ
^

l
i

are all of predictor variables. The predictor variables that affect response Y1 on model logit

p
^

l
i

are all of predictor variables while the predictor variables that affect response Y2 are all of predictor variables except percentage of pregnant TT2 + immunization women and percentage of midwives per 100,000 population.
Redesign of road drainage system in jalan Banyumas Km 7 Selomerto, Wonosobo with normal discharge method
Authors: Faqih Nasyiin , Lestarini Wiji
Published: June 2020

In the rainy season the condition of the channel on Jalan banyumas Km 7 Wonosobo Regency is not able to accommodate the flow of water so that flooding often occurs. Because of that, it is necessary to redesign new drainage channels. This research is quantitative, the method used is to analyze both hydrologically and hydraulically to get the best drainage building design. From the calculated data, it can be concluded that the drainage channel on the Banyumas km 7 Selomerto road must be expanded or dredged at certain channel points where the expansion must take into consideration the current conditions in the field. For the most discharge (Q) is in the QF section with a discharge of 0.13517 m3 / second and the lowest is in the G7 segment with a discharge of 0.00308 m3 / second. From the calculation results obtained that channels 2, 3, 4, 5, 6 and 7 must be redesigned and made a new building.
Characteristics of mechanical properties of coir-fibre/rubber composite
Authors: Arrohman S , Mustofa A S H , Ariawan D , Diharjo K
Published: June 2020

Indonesia has the largest coconut land in the world with area of 3.88 million hectares producing 3.2 million tons of coconut. It produces a large amount of coir fibre and it is potential as reinforcement of composite material. The country also has large rubber forest land with industry investment opportunity of US $ 3 billion. The investigation of mechanical properties with different composition of coco fibre and rubber is needed to find its optimum properties of the porous natural composite. The specimens were varied in weight fraction between coco fibre and rubber (30:70; 50:50; 70:30). All specimens were tested with tensile testing in longitudinal and transverse direction to get its tensile properties and observed by macro photo. The result shows that the increasing of fibre reduces the strength and strain and it has optimum modulus for 50% fibre. This can be used as engineering consideration in producing of product, such as mattress and carpet.
Infrared absorption spectra analysis of TeO2-ZnO-Bi2O3-TiO2 doped B2O3 glasses
Authors: Fausta Devara Ega , Marzuki Ahmad , Cari
Published: June 2020

Boro-tellurite glasses with composition 60TeO2- (30-x)ZnO- 5Bi2O3- 5TiO2- xB2O3 (where x = 0,2.5, and 5 mol%) have been successfully fabricated by melt quenching technique. FTIR characterization was carried out in range 400-4000 cm−1 using a KBr pellet method to study the glass chemical bond. The results show that several absorption peaks were recorded in range 400-4000 cm−1. However, most of the absorption peaks were detected in the region 400-1600 cm−1. It can be divided into 5 groups from 400-450 cm−1, 620-650 cm−1, 900-940 cm−1, and 1100-1300 cm−1. The main absorption peak of TZBT glass located at 620-650 cm−1, which is the fingerprint of TeO2 glass from Te-O vibration of TeO4 units. The addition of B2O3 components constructed a new absorption at 930 cm−1 and 1100-1300 cm−1. The absorption at 930 cm−1 belongs to B-O vibrations of BO4 units. While the absorption at 1100-1300 cm−1 relates to B-O vibrations of BO3 units. For further investigation, the deconvolution process was performed to discover the effect of the addition of B2O3 in the main absorption spectra. It was confirmed that six bands detected in the main absorption peak. The effect of B2O3 reduces the absorption band and shift the wavenumbers in TZBT glass.
An analysis of student’s concepts understanding about simple harmonic motion: Study in vocational high school
Authors: Wardani Fitri
Published: June 2020

This study presents an analysis of the student’s concept of understanding about simple harmonic motion in vocational high school. The sample of the study consisted of 76 vocational high school students 1 Mondokan. The two-tier research instrument used to measure students’ understanding of concepts. The category of concept understanding assessment based on concept understanding indicators, i.e., no understanding, specific misconception, partial understanding with a specific misconception, partial understanding, and sound understanding. The results of the analysis of the quality of the instrument indicate the value of person reliability of 0.82, and item reliability of 0.76 is in a good category. The results showed that specific misconception was 14.6%, partial understanding with a specific misconception was 23.9, partial understanding 36.8%, and sound understanding 24.7%. These findings indicate the need to empower students’ understanding of concepts, using instructional media that can visualize abstract concepts of simple harmonic motion.
Vibration analysis of Kartini reactor secondary cooling pump using FFT analyzer
Authors: Ahmadi H , Subchan M , Rachmanita R E , Audora R D , Wibuana A
Published: June 2020

The vibration of the secondary cooling system the Kartini reactor works to remove heat from the primary cooling system so that the heating element stays below the safety limit of the specified operating temperature. One component that is supported is a pump that is needed one of them by the vibration analysis method. By using vibration analysis, the type of cause of damage to the pump can be detected without dismantling the pump, so that it can provide predictability of maintenance time, scheduling repairs, picking up damaged equipment before hazardous needs. Vibration measurement with vibration meter (Lutron VB 8202) is carried out on the bearing housing of the secondary cooling pump motor housing in the direction: vertical, horizontal and axial. The value of the vibration compared with the vibration pump standard (ISO 10816-3). From the results of pump vibration measurements, there are several pump parts whose conditions are classified as vibrations that can cause damage to these components, namely the pump motor section. The average vibration on the pump motor is 5.74 mm / s greater than 4.5 mm/s that is classified as a vibration velocity value which can cause damage to other pump components. The results of the symptom analysis of variations in the vibration of abnormal values in the pump motor are caused by looseness of rotation and damage to roller bearings.
Investigation of undergraduate student concept understanding on Hydrostatic Pressure using two-tier test
Authors: Cari C. , Pratiwi Scundy Nourma , Affandy Harry , Nugraha Dewanta Arya
Published: June 2020

Investigating students’ understanding of the concept of hydrostatic pressure is based on the importance of this understanding to be able to master static fluid material. This study uses qualitative methods to investigate the understanding of student concepts on the topic of hydrostatic pressure. The sample used in this study was 206 undergraduate student physics and undergraduate student physics education at Universitas Sebelas Maret, and Universitas Islam Negeri (UIN) Sunan Kalijaga Yogyakarta. The results of the analysis show that ten items developed were declared valid in content based on expert judgment. This is evidenced by the acquisition of V index of 0.99, while the Vtable is 0.92. The reliability estimation results obtained by the value of person reliability (testee) of 0.82, and reliability items of 0.75. It can be concluded that the consistency of the answers from either the testee or from the item in question has high reliability. The results of the investigation showed that there were many undergraduate students after studying physics, not being able to understand even in the simplest parts. Some concepts have been misunderstood; this has led to undergraduate students considering physics as a difficult, complicated, and time-consuming science to be able to understand it.
Engineering design behavior elementary student’s through the STEM approach
Authors: Firdaus A R , Rahayu G D S
Published: June 2020

This study aims to obtain an overview of the engineering design behavior students at the elementary school level. This research was carried out using the Pre-Experiment method with Pretest-posttest One-Group design. The lesson is implemented using learning based on Science, Technology, Engineering and Mathematics (STEM) where the learning method refers to the Engineering Design Process. The stages consist of problem scoping, idea generation, design and construct, design evaluation and re-design. Data analysis uses quantitative descriptive analysis. Observations of the engineering design behavior students revealed that in the first phase, students who learned through STEM were categorized as beginner designers and in the second phase as emerging designers. The conclusion of this study is that STEM-based learning can improve the engineering design behavior of elementary students.
Mathematics communication ability in statistica materials based on reflective cognitive style
Authors: Shodiqin A. , Waluya S.B. , Rochmad  , Wardono
Published: June 2020

This study aims to explore the mathematical communication of students based on Reflective cognitive style. This research is a qualitative research that is descriptive qualitative. The subjects in this study were students who took statistics methods, the selection of research subjects with a purposive sampling technique, the validity of the data was obtained by the method triangulation technique. Data analysis with the process: (1) reduction data, (2) presentation data; and (3) making conclusions and verification. The results of this study are: (1) SM subjects are able to propose hypotheses by making convince statements related to the problem given, but in guessing hypotheses tend to require a relatively long time, (2) SM subjects can understand and evaluate ideas in mathematics in problems solving in writing, (3) subjects are able to present and read tables, and graphs, as well as fill out the things that are known and asked completely and correctly, (4) the subject SM is able to conclude the answer from the results of solving the problem in accordance with the question, (5) able to complete and clear in communicating his ideas to others verbally, clearly and completely, but tends to take a long time. By studying or analyzing mathematical communication on statistical methods based on reflective cognitive style, it will certainly improve mathematics learning.
The difficulties of students when solving HOTS problem and the description of students cognitive load after given worked example as a feedback
Authors: Asrafil  , Retnawati H , Retnowati E
Published: June 2020

The study aims to describe the obstacles of high school mathematics teachers in teaching the distance and angle of the three dimensions materials. This research is a descriptive exploratory study with a qualitative approach. We collected the data using interviews and questionnaires. The subject was 11 mathematics teachers of SMA, SMK, and MA in Semarang City and Demak Regency. The data was analyzed by looking for themes and determining inter-theme relations to gain an understanding. The findings are as follows. First, obstacles faced by mathematics teachers to teach the distance and angle of the three dimensions materials are teachers’ limited professional competence, students’ difficulties in understanding the concept, students’ difficulties in thinking, and the need for proper learning media. Second, some efforts made by teachers to overcome and expect obstacles happened namely discussing problems with other senior teachers, preparing and learning the materials that require special attention, using visual media, provides exercises with many types, close to psychology with students, and testing various proper teaching models and methods of three-dimension materials.
Effectiveness of problem solving-based module to improve analytical thinking
Authors: Karenina Aziza , Widoretno Sri , Prayitno Baskoro Adi
Published: June 2020

This research is the result of the effectiveness test of analytical thinking using the integration of problem solving and analytical thinking aspects in the of the human respiratory system material. The problem-solving aspects are identify, define, explore, act, and look back while the aspects of analytical thinking are differentiating, organizing, and attributing. The research method used was quasi-experimental. There were 74 participating students divided into two classes, namely the control class and the experimental class. The effectiveness of the analytical thinking process is based on two types of questions, namely multiple-choice and metacognitive questions. The results show that 1) the average score of the analytical thinking process using multiple-choice questions of the experimental class (76.95) is higher than that of the control class (65.20); 2) the average score of the analytical thinking process using multiple-choice questions of the experimental class (61.72) is higher than that of the control class (60.63); and 3) the average score of aspects of the analytical thinking process of the experimental class is higher than that of the control class, but the students obtain the lowest score in the organizing aspect.
Analysis of STEM-PBL based e-module needs to improve students’ critical-thinking skills
Authors: Purnamasari Dian , Ashadi  , Utomo Suryadi Budi
Published: June 2020

STEM is a learning approach that integrates the teaching of science and mathematics through scientific inquiry, technology and engineering, and mathematical analysis to develop 21st century skills. One of them is critical-thinking skills that are thinking skills involving cognitive, analytical, rational, and logical processes and inviting students to do reflective thinking to problems. The application of STEM which is integrated with problem-based learning and packaged in an e-module will produce creative individuals with critical thinking. The design of the research uses qualitative description. It aims to investigate the need for teaching materials in the form of STEM-PBL based e-Module and critical thinking profiles of students in senior high schools. The subjects of the research were 75 students and 1 chemistry teacher. The data were collected through several techniques such as interviews, questionnaires and critical-thinking essay tests. The results show that students cannot think critically in solving chemical problems and need teaching materials in the form of STEM-PBL-based e-Modules.
ICT-Based Learning Media to Enhance Students’ Problem Solving Ability in Efforts to Face the Industrial Revolution 4.0
Authors: Herdianto E N , Mardiyana  , Indriati D
Published: June 2020

This study aimed to describe the feasibility of ICT-based learning media to improve student’s abilities in mathematical problem solving to face the industrial revolution 4.0. This research developed by four D method, consist of define, design, develop and disseminate. The stages include analysis of potential and problems, the formulation objectives of the research, preparation of research instruments and learning media design, validation and revision of learning media, and implementation. Product trials were conducted in two different classes. The results showed that ICT based learning media were valid for use, in terms of the results from media expert validation. ICT-based learning media also meet practically and effectiveness for use in learning mathematics and can improve students’ problems-solving ability, reviewed from evaluation tests that were developed show the results that students who use ICT-based learning media have better problem solving skills.
Developing environmental awareness through experiential learning: A critical analysis of higher education students’ practices
Authors: Widyastuti Fatma , Probosari Riezky Maya , Sajidan  , Saputro Sulistyo , Sutikno
Published: June 2020

Today’s higher education students recognize the importance of environmental issues, but the traditional learning curriculum is weak in opportunities for students to experience the link between the theory and practice of environmental sustainability. The aims of this study were given information about higher education students’ awareness of the environment according to their experiences. Furthermore, implementing best practices in Experiential Learning. Environmental awareness is an attitude in seeing and managing the environment surrounding. It is about the way how students thinking and viewing about surrounding based on their own perspectives. Experiential Learning is referred to learning by doing, experiencing, discovering, and exploring. It is a philosophy and methodology where educators intentionally involve with students in direct experience and focused reflection to improve knowledge, develop skills, and clarify values. The method of this study was descriptive qualitative research and the data were analyzed by the Rasch model. The participants were 30 physics students of semester two in Environmental Science/Ilmu Pengetahuan Lingkungan (IPL) subject. The students conducted in practice through experiential learning to gain the data. The results of this study concluded that students’ awareness of the environment was based on their existing and recent experiences.
Adaptive reasoning and procedural fluency in three-dimensional
Authors: Kusuma Dewi I.L , Waluya S.B , Rachmad  , Firmasari S
Published: June 2020

This research is motivated by the difficulty of students determining the angle between a line and a plane in the construction of three dimensions. Students sometimes hesitate to identify the algorithm that will be used to solve the distance and angle problems in the three-dimensional material in the lecture of Capita Selecta. Based on this, this study aims to analyze the adaptive reasoning abilities and procedural fluency of students in solving three-dimensional problems. The method used in this study is a qualitative method with a descriptive design. The research was conducted on 20 students. The results of this study indicate students can think logically in choosing the right concepts and situations and are accurate in doing calculations. Students also have shown the correct procedure by making fields through the CF line and ⊥ ACH fields. The algorithms used by students are varied so that students are found to have not been precise in determining the projection length of the CF line. It can affect the angle between the CF line and the ACH plane obtained.
Enhancing elementary teachers’ science process skills through participatory scientific approach training
Authors: Rintayati Peduk , Syawaludin Ahmad , Kamsiyati Siti
Published: June 2020

Science learning emphasizes providing direct experience to students through the process of experimental discovery. For this reason, teachers must have scientific process skills in order to design 21st Century science learning that is able to foster scientific attitudes and scientific products in elementary students. This study aims to improve the science process skills of elementary school teachers through Participatory Scientific Approach Training. This study involved 35 teachers who are actively teaching in Surakarta. The study was conducted in two cycles with each cycle consisting of plan, observe, and reflect stages. Data collection techniques are done using observation and performance tests on integrated science process skills. Performance test indicators include variable control skills, data interpretation, hypothesis formulation, operationally defining variables, designing experiments. Data analyzed descriptively and content analysis. The results showed that the application of Participatory Scientific Approach Training had a positive impact on improving the quality of processes and results. The improvement in the process is shown in the increase in the activities of the teachers in the experimental activities. As for the increase in results shown in the increase in scores of all aspects of the science process skills of teachers in the first cycle by 13.04%, and in the second cycle again increased by 12.23%. The smallest improvement was in the aspects of designing experiments, where the teacher had not been able to make experimental designs that were procedural and had parameters.
Effectiveness of analytical thinking–based module to improve students’ learning outcomes using concept map
Authors: Sundari Puput Putri Kus , Widoretno Sri , Ashadi
Published: June 2020

The effectiveness of 21st century learning emphasizes higher order thinking skills, one of which is analytical thinking. The analytical thinking–based module used includes indicators based on the integration of analytical-thinking aspects and Concept Map components. This study aimed to measure improvement in student learning outcomes using Concept Map through an analytical thinking-based module. The research method used was quasi-experimental with a field test design in the form of a pretest-posttest non-equivalent control group design. Participants were 66 students divided into control class using conventional modules and experimental class using analytical thinking–based modules. The calculation of students’ Concept Map scores is based on the Concept Map experts. The data were analyzed using the Ancova test. The effectiveness results showed: 1) the average score of the Concept Map of the experimental class (81.39%) was higher than the control class (47.89%), 2) the average score of the Concept Map component in the experimental class was higher than the control class, but the cross-link score obtained the lowest score. Concept Map is a powerful tool for educating new knowledge and supporting learning outcomes because has a positive effect on improving students’ learning outcomes and assessment of long-life learning in the teaching and learning process.
Computer-based “Color-Mixing Maze Game” to stimulate symbolic thought for the development of learning science in early childhood
Authors: Islamiyah Roudlotul , Setiawati Farida Agus , Utami Winda Sherly
Published: June 2020

The purpose of this study was to determine the differences in the effectiveness of the computer-based “color mixing maze games” to stimulate symbolic thinking for the development of learning science in early childhood in the new era of industry 4.0. 23 samples in one kindergarten in Surabaya were used for this study consisted of 13 children (TK A1) for the experimental group and 10 children (TK A2) for the control group. This research was a type of quantitative experimental research using the Quasi-experiment method and the Non-equivalent Control Group Design. The Independent Sample T-Test was used for the data analysis technique and N-Gain with SPSS 21 was used for the effectiveness test. The results of the effectiveness test depicted a result of the Sig≤0.05 value and thus Ho was rejected and Ha was accepted, which means that there were significant differences in effectiveness computer-based “color mixing maze games” compared with paper-based games to stimulate symbolic thinking in the development of learning science in early childhood. Computer-based games are stated to be able to provide the right understanding in the learning process including science learning in recognizing mixing colors.
Indonesian traditional windmill of Demak, Central Java for water pumping in traditional salt production
Authors: Deo St Debby Christmas , Zevalukito S Dio , Lukiyanto YB
Published: June 2020

Wind is a renewable energy and has many benefit. This energy is used by the salt farmers in the north coast of Java. Windpump is used to convert the wind energy for pumping water from sea to the salt pond. The purpose of this study is to get the performance of salt farmer’s windpump from Demak Region, Central Java for water lifting with vertically reciprocating pump. Rotation of shaft is directly converted to linear translation by crankshaft and connected to the piston pump. This study uses three variations lenght of the crankshaft arm in a piston pump. In 2 up to 5 m/s of wind speed range, the windmills from Demak with arm length of 5.0 cm, 7.5 cm, and 10.0 cm has an average volume flow rate of 0.89 litre/s, 1.8 litre/s, and 1.3 litre/s, respectively. For a day, these variations has a daily average volume of 19,278 litre, 39,162 litre, dan 27,804 litre.
The effect use of STEAM method on the classification ability in objects for children aged 4-5 years
Authors: Rasmani Upik Elok Endang , Nurjanah Novita Eka , Wahyuningsih Siti
Published: June 2020

This study determined the effect of using the STEAM method on classifying the ability of objects in children aged 4-5 years, using the quantitative and quasi-experimental design method with a non-equvalent control group design. Data was obtained from Class A Kindergarten Family Length 03 Ambarawa with AI and A2 as the experimental and control groups respectively. In addition, the preetest and posttest methods were used to retrieve data which were analyzed using prerequisite, hypothesis and independent sample t-test. An average pretest of the experimental group of 5, 45 and posttest of 9, 60, were utilized and the data analysis showed a significance of 0,000 on the basis of decision making when
ρ
> 0.05. The results of the study explaned an influence on the use of the STEAM method to classify objects in children aged 4-5 years. This is evidenced by the significance level with the pretest and posttest greater and less than 0.05 respectively, which indicates difference.
Strategic study of visual, auditory, haptic information processing and identification of physics learning materials that require VAH-based learning media facilities
Authors: Kristiyanto W H , Pattiserlihun A , Giovanni S K
Published: June 2020

This study aims are to review cognitive theories derived from visual, auditory, and haptic (VAH) sensory and to identify physics learning materials that require digital/multimedia / video learning media that need to be enhanced with the haptic sensory facility. This study uses a quantitative method, especially content analysis. Literature used in this study were VAH information processing journals and books for cognitive reviews theory, and Hewitt’s Conceptual Physics for physics learning materials. The results of the study indicate that visual information pass through the sense of sight (eyes), auditory information pass through the sense of hearing (ears), and haptic information pass through senses of feeling (vibration, touch, palpation). This study also finds that some physics materials need to enhance with haptic sensory; namely support force, acceleration, friction, Newton’s Second Law of Motion, and Newton’s Third Law of Motion.
Development of hot water storage in hybrid-solar thermal air conditioning system
Authors: Kurniawan Yudhy , Kusnandar  , Berkah F T K , Tony S U M S K
Published: June 2020

The utilization of Split AC as a water heater is now initiated but still uses a heater from electricity. Besides that, the use of solar thermal radiation as a source of heating has already made much. In this study discussed if both systems were merged into a hybrid-Solar Thermal Air Conditioner (STAC) system. The STAC system will combine the heat refrigerant on a discharge line compressor with a solar heat collector. This system has been designed in previous studies only limited to the analysis of the achievement of the temperature is 40 °C within 20 minutes. But the obstacles experienced by heat cannot last long because it utilizes peak load time from solar radiation and thin tank insulation. For it developed a hybrid system with the replacement of a hot water tank. The method begins by creating a model for the hybrid system modification, the determination of tank insulation material and heat storage wall thickness so that the water heat loss can be reduced. Then on the solar collector modified by the pipe installation series as well as the 20° collector tilt angle. For circulation flow refrigerant from the discharge line compressor added automatic control, it is expected the performance of the system more maximized. The results can be seen that the water heating time can reach values above 40 oC in 30 minutes, the hybrid system efficiency is 47.9%, and the refrigeration efficiency is 75%.
Evaluation of Palm Sap (Neera) Quality (Arenga pinnata Merr) in Processing of House Hold Palm Sugar (Case Study on Aren Farmers in Gunung Halu Village, Gunung Halu District, West Bandung Regency)
Authors: Gunawan W , Maulani R R , Hati E P , Awaliyah F , Afif A H , Albab R G
Published: June 2020

Palm sap (Neera) is a sweet liquid that is obtained from the cutting of flower bunches of sugar palm (Arenga pinnata Merr). Nira used as a raw material for making palm sugar. Palm sugar with good quality depends on the quality of the sap processed. The research was conducted to study the different quality of nira in household processing of palm sugar based on differences in storage containers (lodong), namely traditional containers using bamboo and modern containers using aluminium. Harvesting of the nira was conducted in the morning and afternoon time. Observations were carried on chemical quality (pH and total soluble solid), organoleptic perception (color, aroma, and taste), and the number of bacterial colonies (total plate count). The results showed that then treatments using aluminium container had better quality of nira with a mean value of pH 6.95, mean value of TSS 13.7 Brix, the organoleptic perceptions of color is more clear, taste is sweet, and fragrant smell; and the mean number of bacterial colonies is 12.5.
The Household Welfare Level of Integrated Plantation Polyculture Farmers
Authors: Priyadi R , Nuryati R , Faqihuddin
Published: June 2020

Many studies have reviewed economic benefits and ecological benefits of the integration of crop-livestock, but the author has not found a study that examines the farmer’s welfare. This is important because welfare is one of the sustainable (agricultural) development goals. In addition, as an agrarian country, attention to the welfare of farmers in Indonesia is considered very strategic. This study aims to examine the value of the Farmer Household Income Exchanges Rate (FHIER) as an indicator of the welfare level Integrated Plantation of Polyculture Farmers’ (IPPF) households. This study was conducted in Tasikmalaya Regency. The survey method has been carried out to 83 respondents (IPPF). The result based on the value of FHIER shows that IPPF households included in the welfare category. Meanwhile, the result of statistic analysis shows that revenue is a more important factor in determining FHIER. In more detail, it is known that revenue and expenditure from integrated plantation polyculture activities are becoming more important factors as determining the value of FHIER. Therefore, it is suggested to improve the revenues of farming households through the integrated plantation of polyculture farming in order to reach the welfare category (higher value of FHIER).
Smart Agriculture Using Supply Chain Management Based On Hyperledger Blockchain
Authors: Putri A N , Hariadi M , Wibawa A D
Published: June 2020

Indonesia is an agricultural country, and one of the regions is Semarang Regency which well known as chili producers. Unfortunately, common issues occurred such as the fluctuation of the stock price and chili, the low exchange values of farmers in prices because of the complicated flow distribution chain. Furthermore, chili is quickly decomposed, but the demand is high enough. The solutions are to predict the demand for supply chain management, to make payment transactions of agricultural needs of farmers by analyzing stocks, raw materials, price to the chain of distribution, also to build trade links among farmers, consumers and Semarang District Agriculture Service. This journal discussed the flow of supply chain and logistics. We recommend to use the latest technology called Hyperledger Blockchain and IOT so that they can make it easier to carry out the transaction process because it is simple, low cost, transparent, faster. It also has high data security, and simplify ecosystems can be easy to exchange information quickly through Hyperledger Blockchain transactions so that the potential of this technology can bring benefits to farmers and consumers by creating the construction of a trusted distribution network that will bring a data transparency solution so that it can become a suggestion for the Semarang District Agriculture Service.
Thin Layer Chromatography and Total Flavonoid Contents of Iler Leaves (Plectranthus Scutellarioides) Under Drought Stress Treatment
Authors: Wijaya W W , Parjanto  , Yunus A , Widiyastuti Y
Published: June 2020

Iler (Plectranthus scutellarioides) contain secondary metabolites flavonoid that widely used in the treatment of hemorrhoids, antioxidants, and tuberculosis. The objectives of this study were to increase total flavonoid content ofPlectranthus scutellarioidestreated with several level of drought stress. The study was conducted at the screen house, Jumantono belong to Sebelas Maret University Surakarta, July to October 2018 and flavonoids analysis was carried out at the Center for Research and Development of Traditional Medicinal Plants and Medicines (B2P2TOOT), Central Java. The research method used a completely randomized design with 4 accessions as the first factor (coarse purple, fine purple, green, and red leaves) and drought stress watered once a day, watered every 2 days, watered every 3 days, and watered every 4 days as the second factor. The data obtained were analyzed by analysis of variance (ANOVA) followed by Duncan Test (DMRT) 5%. Total flavonoid content was estimated spectrophotometrically using AlCl3, analysis of TLC was done by using TLC densito metric method. The highest total flavonoid content performed by fine purple leaves and watered once a day with 11.044. Coarse and fine purple leaves formed the more number in TLC with 10 spots that indicates the more active compound formed.
Correlation Between Blood Parameters, Physiological and Liver Gene Expression Levels in Native Laying Hens Under Heat Stress
Authors: Adriani L. , Mushawwir A.
Published: June 2020

The heat stress plays an important role in feed efficiency, blood profile, rate metabolism. Growth performance, health and its influence economic loss of layin hens can be strongly affected by climate. The study to investigate the effect of the heat stress on blood parameters (White Blood Cells/WBC, lymphocytes, neutrofils, glucose, creatinine, creatinine kinase/CK), physiological status (rectal temperature/RT, heart rate/HR), and liver gene expression (Glutamate pyruvate transaminase/GPT, Glutamate oxaloacetate transaminase/GOT, Threonine dehydrogenase/TDH, heat shock protein 70/HSP70) in laying hens. Two hundred native laying hens were randomly assigned to 10 groups of temperature humidity Index (THI), with 20 animals per group. They were kept in environmental condition with temperature humidity index (THI) ranging from 65.50 to 85.72 in temperature humidity. Blood plasma samples were used to determine the concentration of blood biochemical parameters, using a commercial kit by an automatic biochemical analyser. Liver gene expression levels were analyzed by Real-time PCR. The results showed that their RT, HR, WBC, neutrophilis, creatinine, CK, liver gene expression levels were increased in high THI compared to at low THI. In contrast, glucose and lymphocytes levels was decreased in high THI. In addition, HR, RT, WBC, neutrophilis, creatinine, CK, liver gene expression were positively correlated with THI. On the other hand, negatively correlated with THI were showed by glucose and lymphocite. As conclusion, based on these results, it can be concluded that all parameters in this study are closely associated with heat stress. These parameters can be consolidated to heat stress biomarkers in native laying hens.
Study of Shallot (Allium ascalonicum L) Seed Viability From True Shallot Seed (TSS)
Authors: Megawati S , Pardono  , Triharyanto E
Published: June 2020

The use of shallot bulbs as the main planting material has many weaknesses, so one of the solutions is to use botanical seeds (True Shallot Seed). Physiologically, good seeds have embryos, endosperm, radicles, and testa. Seed viability demonstrated by the viability of seeds, metabolically active, and has enzymes that can catalyze metabolic reactions for germination. The purpose of this study was to determine the potential of the seed to determine its quality. One method for testing seed potential is the viability test through the tetrazolium test and the vigor test through Germination Rate. This research used local varieties of Trisula yields in 2015 (TR 1), Trisula yields of 2018 (TR 2) and as a control used Tuk-Tuk varieties. The results of the viability test using tetrazolium showed that the average viable seeds in the TR1 variety were 90.5%, TR2 94%, Tuk-tuk 95.5% which meant that the potential of the seed was still good because it was over 80%. The results of the vigor test through the measurement of germination rate gave significantly different results on each variable with an average yield of TR1 8.45% per etmal, TR2 11.41% per et mal, and Tuk-tuk 14.27% per et mal.
Growth And Nitrogen Uptake of Kenikir (Cosmos caudatus Kunth.) Microgreens In A Combination of Manure And Biochar Planting Media
Authors: Efendi B , Supriyono  , Dewi W S
Published: June 2020

Microgreens are young vegetable greens that harvested when the cotyledons have fully developed, which usually occurs at the age of 7-14 days after germination. Kenikir is a medicinal vegetable plant that has many health benefits. Microgreens cultivation in Indonesia is increasing along with public awareness of health, but the information about the best planting media for the cultivation of microgreens is still very limited. This research aimed to study the effect of a combination of manure and biochar on the growth and N uptake of kenikir microgreens. The research conducted in Mojogedang, Karanganyar, Central Java using a factorial complete randomized block design (RCBD). The first factor is the type of manure consisting of control, cows, and goats. The second factor is the type of biochar consisting of husks, coconut shells, and rice straw. The results showed that the combination of manure and biochar treatment can increase plant N uptake. The combination of cow manure with various types of biochar produces the highest N uptake. Cow manure combined with husk, coconut shell and straw biochar successively produced N absorption 1.72%, 1.81% and 1.91%. However, the large uptake of N does not influence the growth of microgreens.. The variety of manure did not significantly affect the growth (plant height, leaf area, and root length) of kenikir microgreens. Biochar type affects plant height. Husk biochar increases plant height by 16.29%, and coconut shell biochar increases plant height by 9.03% compared to straw biochar.
Identification and Mapping of Areas Indicated Violating Spatial Use in The North Bandung Region
Authors: Kusumawati S , Renald A , Darmun M , Putri P A , Herdiansyah F A , Aisharya I Y , Saepudin H , Walto D , Widaningsih  , Santana A , Supartika N , Prihastuti S , Pasai B B H B , Suseno B R
Published: June 2020

North Bandung Region (KBU) is a conservation area, water catchment and investment magnet attracting high due to its strategic location at an altitude level above 750 meters above sea level. Developments at KBU have a disastrous impact on the below highland. This research was conducted to identify mismatches in spatial use and indications of violations of spatial use with the superimpose method of spatial plan maps with existing land cover maps. Continued spatial analysis, object/point filtering, field observations, focus group discussions, spatial performance analysis and impact calculations. The results stated that there were 4,414 polygons and 42 typologies of spatial mismatch and 108 points of indication of violation. Found four typologies of violations of spatial use; spatial use that is not in accordance with the spatial plan, is not in accordance with the spatial use permit granted by the authorized official, is not in accordance with the permit requirements, and issues a permit that is not in accordance with the spatial plan. Recommendations for law enforcement measures in the form of administrative and/or criminal sanctions are given to points of activity that are indicated to have experienced violations of spatial use.
Promoting Climate Smart Sustainable Agriculture for Enhancing The Resilient of Soil Health, Rice Productivity and Food Security in Indonesia
Authors: Simarmata Tualar , Prayoga M Khais , Setiawati Mieke R
Published: June 2020

Indonesia is facing magnificent dilemma for providing food and other agricultural product to meet the food requirement of rapidly growing population and preserving land resources, health of soil ecosystem and mitigating and adapting to climate change (CC). About 70% of agricultural soils in Indonesia has been exhausted and over mined and categorized as sick soils. The impacts of CC has already hit Indonesia and caused the rise of temperature about 0.2-0.3 °C per decade and sea level (SRL) about 5 mm per year, drought and floods occur more frequently, the change of rainfall intensity and rainfall pattern, the shifting of planting season and lead to the decreasing of crops yield or yield loss significantly. The CC along coastline (95,181 km) increases and cause a severely more consequence on the livelihoods inhabitants (40% of total population) and decreasing of lowland agriculture. The paddy fields in coastal area until 2050 will decrease around 174,461 ha in Java, 8,095 ha in Bali, 78,701 ha in Sulawesi, 25,372 ha in Kalimantan, 3,170 ha in Sumatera and 2,123 ha in Lombok Island. The effort to restore and maintain the health of soil ecosystem, enhance the productivity and to mitigate and adapt to the climate change can be done by adopting climate smart sustainable agricultural (CSSA). The main objectives of CSSA are to increase the productivity and income (economically viable), improve and maintain the health soils ecosystem, build and strengthen the resilience to climate change and mitigate to reduce the GHGs. The integrated of CSSA in a climate smart sustainable farming village (CSSFV) is expected to more effective for building the resilient the soils ecosystem and farmers, mitigating and reduce the GHGS, increasing the productivity and income of the farmer and enhancing the food security in sustainable ways.
Characteristics of Physical, Chemicals and Organoleptic of Local Rabbit Meat Nuggets (Lepus nigricollis) Using Filler of Tofu Dregs Flour
Authors: Falahudin Aaf , Anggoro Syehril Ibnu , Rahayu Rengganis Suci , Somanjaya Rachmat , Widianingrum Dini
Published: June 2020

Diversification of rabbit meat products into nuggets is one way to increase consumption of rabbit meat by the public. The filler used generally is wheat flour. However, these filler can be substituted by tofu dregs which have better nutritional content. So it is expected that using filler of tofu dregs flour can improve the quality of rabbit nuggets. The study was conducted to investigate the doses of the use of tofu dregs filler to physical, chemical, and organoleptic properties of local rabbit meat nuggets in laboratory of Animal Husbandry Study Program, Faculty of Agriculture, Majalengka University. The best formulation of flour filler was applied to make rabbit nuggets. The experiment was arranged as a completely randomized design (CRD), consisted of 4 tofu dregs doses (0%, 35%, 70% and 100% of tofu gregs) which was repeated 5 times. Namwhile for chemical properties was done by descriptive analysis. The observed respond are include physical properties (pH and cooking loss of the nuggets), chemical properties (water content, ash content, protein content, and fat content), and organoleptic properties (colour, aroma, texture, and taste). The results showed that the addition of tofu dregs in rabbit nuggets has a significant effect on cooking losses, colour, and texture but does not affect the pH, aroma, and taste of rabbit meat nuggets. The use of tofu dregs in rabbit nugget has a significant effect on the physical quality of cooking losses but does not affect the pH value. The increasing of doses of tofu dregs tended to decrease the water and ash content and increase the fat and protein content. Moreover, the addition of tofu dregs affects the colour and texture but does not affect the aroma and taste of rabbit nuggets. The best dosage of tofu dregs filler for rabbit meat nugget was 70% and 30% of wheat flour. This finding concludes that tofu waste can be applied to making rabbit nuggets as much as 70% replacing wheat flour.