bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of Physics Learning Media on Rotational Materials Based on Interactive Multimedia
Authors: Widodo AYP , Yennita  , Azhar  , Islami Nur
Published: December 2019

Development of learning media is important to be done to help the process of learning physics. The purpose of this research is to develop learning media on the material of rotational dynamics. The media is created using Photoshop software, Corel Draw and Macromedia Flash. This Media consists of opening pages, which contain competencies, materials, games, evaluations and creator pages. This media displays images, animations related to subject matter and games that attract students in learning physics. The results of the development in the form of instructional media are intact so that they can be used by both teachers and students.
Augmented Reality Applied in Astronomy Subject
Authors: Herfana P , Nasir Muhammad , Azhar  , Prastowo R
Published: December 2019

Mobile augmented reality is one of the most potential technology for education. Science astronomy is one of the subject that need to develop by mobile augmented reality technology. Purpose in this research is to create mobile augmented reality based on astronomy subject in Indonesian curriculum in junior high school. Animation that has been show in this application follows Kepler’s law about planetary motion. This research is R&D research and it follow instructional design type ADDIE. This researcher collected the data qualitatively from 2 experts, 2 teachers and 2 students. Each of participant will give suggestion to improve the quality of the application. Finally the application has been made with 16 marker. 11 explain about member of solar system, 3 marker about rotation and revolution of earth and moon, and 2 marker is about solar eclipse and moon eclipse. The application size is 47 Mb with Apk format. It can be use at least in android version 4.1 jelly bean and camera 13 MP. This application is ready to use for more large participant.
The Effect of Attribute Hierarchy Method (AHM) with OMC Model on Chemistry
Authors: Rery R. Usman , Frimansyah Monica Ramadhani , Abdullah  , Alimin Masnaini
Published: December 2019

This study aims to determine the learning difficulties of learners using the Attribute Hierarchy Method (AHM) with ordered multiple choices (OMC) model on chemical equilibrium. The Instruments develop used ADDIE (Analyze, Design, Development, Implementation and Evaluation) model. The research instrument used a multiple-choice test that has a score that all correct answer options. There are 8 types of attributes concerning chemical equilibrium in the instrument. The sample was high school students in Pekanbaru. Instrument validity includes material, construction, and language aspects. Based on the validity test results obtained that the developed instrument has been in valid category. Material validity aspect value 3.50, validity of the construction obtained value 3.7 and aspects of language value of 3.59. Instrument reliability test results using the formula of KR-20 obtained a value of 0.717 in high category. The learning difficulties of learners obtained that learners have the greatest learning attribute 6, which is the equilibrium constant of pressure (Kp) which has not been mastered by 58% of students 2.) Attribute 7 is the relationship between Kp and Kc that has not been mastered by 63.75% students, 3.) Attribute 4 is Le Chatelier’s principle which has not been mastered by 80% of students and 4.) Attribute 8 is the degree of dissociation that has not been mastered by 77.5% of students.
Exploration of Physics Concepts of Jatim Park: From Classical Physics to Digital Technology
Authors: Suprapto N , Adam A S , Suliyanah  , Sunarti T , Mubarok H
Published: December 2019

As the common understanding, physics extend well in every part of life, include in many holiday destinations in Indonesia. In the east of Java, Jatim Park group has established by the combination of education and entertainment, produce the concept of learning while playing. However, most of the props didn’t contain the farther information about the cause or the process of certain phenomena. This particular study is part of the combination of the observation, literature study from relevant sources and authors’ knowledge in physics concept analysing. Accordingly, this paper describes the physics concept in two different locations of Jatim Park group, Jatim Park 1 and Jatim Park 3 (Infinite World). Moreover, the physics exploration captures the modernity of that destination, from classical physics to digital technology. In addition, the authors represent the standardization of the physics props on both of that park.
Epistemological Belief of Physics Students in Finishing Thesis: The Preparation of Being Participatory Action Research
Authors: Suliyanah  , Suprapto N , Mubarok H , Adam A S , Sunarti T
Published: December 2019

Indonesia is a unique country in higher education, undergraduate students are required to complete their final project in the research form that called a thesis. Various problems recognized by the students become their own experience in practicing research and writing. The aim of the study is a description of the students’ ability, especially physics students about the epistemological belief of physics students in finishing the thesis. This study used a qualitative-quantitative combination research design (mixed method) with exploratory research design techniques. This research using Participatory Action Research (PAR) strategy was involving by Physics Education students at Surabaya State University. The result of this study shows that the physics students have good epistemological belief in finishing the thesis. Most of the participatory action researches are more interested in the physics learning media field.
Pre-Service Physics Teachers’ Experiences of Being Member of Photo Voice Project
Authors: Sunarti T , Mubarok H , Suliyanah  , Adam A S , Suprapto N
Published: December 2019

In effort to map the readiness of high school physics laboratories in East Java to support the achievement of Basic Competency (BC) Skills, research has been conducted involving prospective teacher students through the technique of “photo voice”, to optimizes pre-service physics teacher who take part in learning field practice in 2019 as participant research (teaching exercises as well as research exercises) through Participatory Action Research (PAR) 93 prospective teacher receive photography training, plan shooting actions, reporting the results of taking a physics laboratory shot at a partner school in the form of an article. Providing experience to prospective teacher has a positive impact on the achievement of pedagogical and professional competence. The impact of the experience is that students have been able to take laboratory photo images in accordance with the purpose of displaying images. By doing so, the project of making articles from capturing and interpreting laboratory images is used as achievement of BC of knowledge and BC of skills as mandated by the Indonesian education curriculum 2013.
Essential Factors Influencing Preparation of Physics Laboratory in New Curriculum: Photo Voice Study
Authors: Suprapto N , Suliyanah  , Sunarti T , Adam A S , Mubarok H
Published: December 2019

This research was stimulated by the situation of Indonesian curriculum especially in physics that requiring the balancing between basic competence of knowledge and skills. Currently, the main problem is the basic competence of skills become the second orientation, therefore, it should be more attention. Physics laboratory is the essential room in supporting the implementation of new curriculum, K13. Through a qualitative study, this research used interview process to pre-service and in-service physics teachers in East Java Indonesia. Totally, 4 in-service physics teachers and 9 pre-service-physics teachers were invited in the semi-structured interview process by utilising photo voice approach. The research captured seven factors as well as the attitudes towards new physics curriculum, which categorised into: practical application, curriculum content, academic anxiety, need analysis, globalisation effect, assessment effect, and government policy. Meanwhile, each factor was implicated to other factors.
Designing Prototype Learning Media for Circular Motion Uniform Based on Arduino Uno Microcontroller
Authors: Azizahwati Azizahwati , Sudrajat Hendar , Hidayat Fahrun , Ridho Muhammad
Published: December 2019

This research aims to produce a prototype of a uniform circular motion learning media based on Arduino Uno microcontroller. The research design uses the Research and Development (R&D) method by using the 4D model which includes: (1) define, (2) design, (3) develop, and (4) disseminate. This research was conducted only at the design stage. The results showed that the accuracy of the learning media prototype was 95.24% and the measurement error was 4.76%. This research has succeeded in designing a uniform circular motion learning media based on the Arduino Uno microcontroller to be developed as an alternative learning media in determining frequency and angular velocity.
Needs Analysis of Air Quality Detection Tool in Project Based Learning
Authors: Rahmad M. , Syaflita Dina , Nor M. , Susanti Metty
Published: December 2019

Riau is an area that tends to experience the effects of air pollution due to smoke haze and dust in the dry season, causes the need for early understanding for students in schools. For this reason, it is necessary to have an experiment media specifically designed for learning science physics on environmental pollution and global warming in secondary schools. Therefore, the purpose of the research is to analyze the need for an air quality detection experiment that can be used in project-based learning. This research uses the method of ADDIE model (Analysis, Design, Development, Implementation, Evaluation) which focuses on the analysis phase of the need for designing experiment media tools. The instrument of research collecting data was through interviews with teachers and giving questionnaires to junior high school students. The results of the research indicate that an experiment tools media that is easy to use, easy to carry, has instructions and is able to measure air quality digitally is needed. Based on the analysis of the aspects of the needs through interviews with teachers and questionnaire to students, basically teacher and students need an experiment tools meda for detection of air quality in project-based learning in yunior high schools.
Improving Mathematical Communication Skills of SMP Students Through Contextual Learning
Authors: Hutapea N M , Saragih S , Sakur
Published: December 2019

Mathematical communication skills (MCSs) are necessary skills for everyone to face lots of challenges in life. With these skills, mathematical ideas can be exploited in various perspectives. At the same time, students’ thinking can be sharpened, consolidated and organized. Their growth can be measured; their mathematical knowledge and development can be constructed; students’ reasoning can be improved, and their communication can be formed. In fact, students’ MCSs have not developed well. Contextual learning (CL) is expected to trigger the development of students’ MCSs. The study aims to examine the improvement of students’ MCSs through the CL. This study used quasi experiment with pretest and posttest control group design. This study used a set of MCSs tests. Data were analyzed by two-line Anava. The results show that there is an increase in students’ MCSs through CL which is higher than conventional learning (CVL); overall: 0.81 > 0.68, school category: 0.87 > 0.76 (above), 0.74 > 0.60 (middle); the increase, both overall and the upper level through CL are high, but moderate through CVL. While at the middle level, both CL and CVL are moderate; and there is a significant interaction effect between learning and school level on improving students’ MCSs.
Identifying Students’ Scientific Communication Skills on Vertebrata Organs
Authors: Alpusari M , Mulyani E A , Putra Z H , Widyanthi A , Hermita N
Published: December 2019

The purpose of this study is to identify students’ science communication skills of vertebrate organs. Using the EICIR (Experiencing, Interaction, Communication, Internalization and Reflection) approach. This study uses descriptive qualitative research method and the learning activities are designed based on a learning approach called in Indonesia as MIKIR. This approach consists of five learning stages: experience, interaction, communication, internalization and reflection. One hundred and twenty student teachers from Elementary Teacher Education study program, FKIP, University of Riau, participate in this study. The findings indicate that students’ written science communication skill is lower than their verbal science communication skills. In addition, the MIKIR approach could trigger and develop students’ science communication skills.
Ecological Knowledge of Elementary School Students Through the Use of Ecoliteracy Teaching Materials in Curriculum 2013
Authors: Noviana E , Kurniaman O , Salwa N , Hermita N , Afendi N , Zufriady Z , Munjiatun  , Misliati M
Published: December 2019

This research provides an overview of students’ different knowledge about ecology in elementary schools using the 2013 curriculum developed by eco-literacy teaching materials. This research uses a quasi-experimental method with two classes consisting of an experimental class and a control class with a research subject of 37 fourth grade students at SD Negeri 181 Pekanbaru. The results of the study on students’ ecological knowledge pre-test with an average experimental class of 57.2973 and control class 58.5946, then given a different treatment so that the posttest data obtained with an average experimental class 87.3514 while the control class with an average of 74.3784 seen the experimental class higher average ecological knowledge compared with the control class, to see the difference in ecological knowledge then the pre-test and posttest data were tested for differences, the results obtained by the experimental class 0.569 > 0.05 then Ho was accepted and Ha was rejected it can be concluded that the ecological knowledge data of students had no significant difference using teaching materials for eco-literacy in the experimental class. In the control class 0.000 < 0.05, it was concluded that Ho was rejected and Ha was accepted, so there was a significant difference in the control class in the ecological knowledge of pre-test and posttest. It was concluded that the use of eco-literacy teaching materials was more effective in increasing students’ ecological knowledge.
A Study of Prospective Primary School Teachers’ Alternatif Conception in Heat and Temperature
Authors: Hermita N , Alpusari M , Noviana E , Kurniaman O , Widyanthi A , Suhandi A
Published: December 2019

The aim of the study was to descibe of the alternative conception of prospective primary school teachers related to concept of heat and temperature. This study uses the quantitative descriptive method. This study was conducted on 34 prospective primary school teachers at one university in Riau Province who had attended the basic concepts of science course. The university is located in the coastal area of Riau province. The instrument used to collect data is a conception test in the form of true/false choices accompanied by an explanation of the answers. Based on the choice of true/false answers and explanations given by prospective elementary school teachers, the alternative conceptions they have can be determined. The results showed that there were a number of alternative conceptions owned by prospective elementary school teacher students related to the concept of heat and temperature, where some of the alternative conceptions led to a state of misconception.
RADEC: An Alternative Learning Of Higher Order Thinking Skills (HOTs) Students Of Elementary School on Water Cycle
Authors: Handayani H , Sopandi W , Syaodih E , Suhendra I , Hermita N
Published: December 2019

One of the strengths of the RADEC learning model is that learning focuses on teaching and problem-solving skills, so in other words, RADEC is a learning model that can develop students’ Higher Order Thinking Skills (HOTS). Learning steps of RADEC consisted of 5 steps which were very easy to remember because they were in accordance with the name of the learning model itself, namely: (1) Read; (2) Answer (A); (3) Discuss (D); (4) Explane (Explain) and (5) Creat (C). At each step of learning RADEC, it can develop HOTS. Students must be able to explore and engage in the learning process so that students’ higher-order thinking skills can be honed. In RADEC learning, each stage can develop high-level student skills including the step of Read. HOTS can be learned in this step by giving the widest opportunity for students to explore and find information from various sources both print and internet. The step of Answer, HOTS can be taught by asking students to look for various alternative answers and solutions. In the Discuss Stage, HOTS can be taught by not limiting students in submitting guesses, ideas, or opinions. The Explane Stage, HOTS can be taught by presenting and communicating the results of the agreement group answers honestly and responsibly, and the other groups will respond to it. While the last stage was Creat, in this step, HOTS can be taught by asking students to provide solutions with their creativity. The results showed that there was an increase in students’ HOTS from an average of 41 to 84.6 after learning with the RADEC learning model.
Improving Science Learning Outcomes of Elementary Students by Using Interactive Multimedia on Human Order Materials
Authors: Qistina M , Hermita N , Alpusari M , Noviana E , Antosa Z , Witri G , Munjiatun M. , Indarni A
Published: December 2019

This study aims to improve the learning outcomes of elementary school science students by using interactive multimedia on human skeleton material. This interactive multimedia is a learning media product in the form of an interactive CD. Based on information obtained by researchers that the lack of enthusiasm of students in science subjects, because students do not have a real picture of how the material process is explained. Therefore, this media is very important to support the learning process of science. The method used in this study uses the Research and Development (R&D) method with the 4D model which has 4 stages of development namely define, design, development, and disseminate. The results of the use of interactive multimedia on students showed that the average pretest score was 57.33 while the average posttest score was 84.17. Based on N-Gain of 0.60 in the medium category and it can be said that the effectiveness of interactive multimedia as a learning medium is classified as effective. Based on these results, it can be concluded that there is an increase in science learning outcomes for students of SDN 034 Taraibangun class IV using interactive multimedia on human skeleton material.
Improvement of Elementary School Critical Thinking Skills Through the POE Learning Model (Predict-Observe-Explain) on Natural Resource Material
Authors: Hermita N , Dewi R , Alpusari M , Noviana E , Kurniaman O , Antosa Z , Sari I K , Mulyani E A , Elvina E , Putra E D
Published: December 2019

This study aims to determine the improvement of critical thinking skills before and after applying the POE learning model (predict-observe-explain). This type of research is a Pre-Experiment type design of One Pretest-Postest Design Group, which is an experiment conducted on one group only, without any comparison. This research was conducted in SDN 188 Pekanbaru in class IVA, which totaled 38 students. Based on the results of the study, it was found that the average score of the learning outcomes before the treatment (pretest) was 57.89 while the average score of the learning outcomes after the treatment (posttest) was 80.63 and the gain index value was 0.55 which was the medium category. This shows that the POE learning model can improve the critical thinking skills of elementary students in natural resource material.
Mixed Reality Application as a Learning System of Motion Systems using Pyramid Hologram Technology
Authors: Gafur IA , Zulfarina  , Yustina
Published: December 2019

The purpose of this study was to develop Biology learning media with Mixed Reality applications using Pyramid Holograms. This research is a qualitative descriptive study. The research was conducted in two stages, namely the problem identification stage and the development stage. The problem identification stage is done by questionnaire and student test results and the development stage by designing Mixed Reality media. The results of the study were in the form of motion system material media with Pyramid Hologram technology that can be used in the learning process.
Impact of the Feeding With the Black Soldier Fly (Hermetia Illucens) on Egg Physical Quality, Egg Chemical Quality and Lipid Metabolism of Laying Hens
Authors: Irawan Andri Cahya , Astuti Dewi Apri , Wibawan I Wayan Teguh , Hermana Widya
Published: December 2019

BSF larvae have a high growth rate and optimal feed conversion and can be well utilized of various types of material as a food source including decomposed organic matter. BSF larvae have amino acid compositions that resemble the amino acid composition of soybean meal or fish meal so that they can function as (antibiotic growth promoters-AGP). AGP aims to maintain the health of the digestive tract of poultry so that feed conversion becomes more efficient and growth performance can be optimal. This study aims to obtain the best type of BSF protein to improve egg quality physically and chemically and the effect of BSF on lipid metabolism. The results of this study indicated that treatment of T3 was the best physically egg quality and chemically egg quality of-laying hens with the use of BSF because it contained protein extract was quite high compared to other treatments. The results of the analysis of blood lipid metabolism that the treatment of live BSF (T1) has the lowest average value, this proved that live BSF was able to reduce the fat content in the blood of laying hens.
Improving Mathematic Students’ Learning Process and Achievement Through Discovery Learning Model at MAN 2 Model Pekanbaru
Authors: Humairah H , Solfitri T , Armis  , Permana D
Published: December 2019

This classroom action research is aimed to improve teaching learning process and students’ achievement by applying Discovery Learning model. The subject of this research was the second semester mathematic students of tenth grade science class in MAN 2 Model Pekanbaru year 2016/2017 which consisted of 13 male students and 17 female students. There were two types of instruments used in this research namely observation sheets to record the teaching learning process and students’ achievement test to obtain students’ score achievement. From the observation sheets which were analyzed descriptively narratively and the second instrument which were analyzed descriptively statistically, it was found that there was a significant improvement in the teaching learning process and the number of students who reached the minimum passing grade increased before the treatment was carried out towards the Cycle I and Cycle II. In the regard of knowledge competence, there were only 11 students or 36,67% who reached the minimum passing grade before the treatment, became 15 students or 50% at the first cycle and 21 students or 70% at the second cycle. In the regard of skill competence, the number of students who reached minimum passing grade from the first cycle with a percentage of 23.33% was increased to 50% in the second cycle. According to the finding of this research, it can be concluded that the implementation of Discovery Learning (DL) model successfully improved the mathematic of second semester students of tenth grade science class in MAN 2 Model Pekanbaru year 2016/2017.
Identification of Adverse Event Patterns in Loperamide Using FP-Growth Algorithm
Authors: Nazir Alwis , Herlina  , Yusra  , Gusti Siska Kurnia , Linda Roza
Published: December 2019

Loperamide is a drug to treat diarrhea, and should not be used for self-medication. There are cases of cardiac disorders due to the use of this drug, this is called an adverse event. Based on this problem, this research will identify the adverse event pattern in Loperamide using the FP-Growth algorithm. The data used is FAERS data from 2015-2017 with the attributes is the age group, sex, drug name, and adverse event. The amount of data after the preprocessing process is 2,840 records. The results is we found the pattern with the highest support values is a combination of adult age groups, male sex, the drug name Loperamide and adverse event cardiac disorders that have a support value of 3.8%, confidence 28.35% and lift ratio 1.483. The implemented using Matlab software and tested using SPMF tools.
On the character table of non-split extension 26.S8
Authors: Ali Faryad
Published: December 2019

Problem Statement & Objective: Character tables of maximal subgroups of finite simple groups provide considerable amount of information about the groups. In the present article, our objective is to compute the character table of one maximal subgroup of the orthogonal group

P
S

O
8
+

(
3
)

. Approach: The projective special orthogonal group

P
S

O
8
+

(
3
)
≅

O
8
+

(
3
)

.2

1

is obtained from the special orthogonal group

S

O
8
+

(
3
)

on factoring by the group of scalar matrices it contains. The group

O
8
+

(
3
)

.2

1

has a maximal subgroup of the form 26.S
8 with index 3838185. The group Q ≅ 26 · S
8 is a non-split group extension of an elementary abelian 2-group of order 64 by the symmetric group S
8. We apply the Fischer-Clifford theory to compute the irreducible characters of the extension 26 · S
8. Results and Conclusion: We produce 64 conjugacy classes of elements as well as 64 irreducible character of the non-split group extension 26 · S
8 corresponding to the three inertia factors H
1 = S
8, H
2 = S
6 × 2 and H
3 = (S
4 × S
4):2.
Hybrid of Particle Swarm and Levenberg Marquardt Optimization in Neural Network Model for Rainfall Prediction
Authors: Warsito Budi , Santoso Rukun , Yasin Hasbi
Published: December 2019

Neural network model has undergone many modifications from the original model through the development of network architecture and optimization methods. By default, the gradient-based optimization method is a method used to find network weights. But some of the weaknesses and limitations of these methods inspired many researchers to try to use other methods. Non-gradient based heuristic method is a reasonable choice considering the learning algorithm in artificial neural networks is inspired by the characteristics of creatures so that optimization methods that also mimic life patterns in nature will be appropriate. One disadvantage of the heurisic method is the length of the iteration process. In this paper, a method which combines heuristic optimization methods and gradient-based methods is applied, namely particle swarm optimization (PSO) and Levenberg Marquardt. The weight obtained from the PSO method becomes the initial weight for the Levenberg Marquardt method. The proposed procedure is applied to the rainfall data in Cokrotulung Klaten. The results showed that this procedure succeeded in providing better predictions than the Levenberg Marquardt method.
The Direction Concept of Leading Tourism Development of Amay Jayapura Beach Based on the Community Aspirations Results
Authors: Rahman Boby
Published: December 2019

Amay Beach is expected by the government and the community to be one of the leading tourism potentials in the Papua Province. However, there are still many problems in the tourist area that must be resolved to meet those expectations. For this reason, we need a concept of tourism development originating from the community as an affected element and those who knows the condition of the problems in the region. This study used a quantitative method with a frequency distribution analysis tool to tabulate the results of community participation. The results concluded that Amay Beach is a region with typical environmental conditions, 46% of the community gave direction to the concept of tourism development in the environmental development sector. Tourism activities are expected to provide economic improvement, so that 33% of the community gives direction to the concept of tourism development in the economic development sector. In addition to these two things, Amay Beach area still holds high local and customary values. As a result, 21% of the community provides development direction in the socio-cultural sector.
Identification of Subsurface Water Flow Using Gradient Horizontal Gravity Data in Tanjung Priok and Koja, North Jakarta
Authors: Ayu Gita Puspa , Rosid M. Syamsu , Kusuma Fajar Bahari
Published: December 2019

The presence of saline or salt water in the Jakarta groundwater aquifer is still widely debated by various geologists and groundwater experts. This study intends to identify the cause of the high salinity of groundwater at Tanjung Priok and Koja, North Jakarta. The First Horizontal Derivative (FHD) method of gravity data is applied to identify the direction of subsurface fluid flow. It is also supported by groundwater sample data and self potential (SP) data. The direction of fluid flow on the FHD contour map is indicated from low to high FHD value. From gravity data, Bouguer density values obtained in the study area were 2.12 gr/cm3. This study focuses on surface aquifers so that it is necessary to separate regional and residual anomalies. The results show that the direction of fluid flow is from north to south, there is a high FHD value that is distributed around the coordinates (709000, 9322000) which may indicate as the salt depositions of sea water intrusion.
Growth and Pepper Yields (Capsicum annuum L.) by Giving a Formulation of Biological Fertilizer of Cellulolytic Bacteria Based on Organic Liquid Waste
Authors: Hapsoh  , Dini I R , Salbiah D , Kusmiati dan
Published: December 2019

Red pepper production in 2016-2017 was increased. Although production has increased, demand for pepper will continue to increase, and efforts to increase soil fertility still need to be sought. To maintain and increase soil productivity, a combination of inorganic fertilizers with appropriate organic fertilizers is needed. One of the organic fertilizers is biofertilizers. This research aimed at finding out the formulation and dosage of biological fertilizers consortium of cellulolytic bacteria based on organic liquid waste that was appropriate for the growth and yield of red pepper plants. This research method used a Completely Randomized Design with 12 treatments, namely (5, 10, 15) ml of biological fertilizer of waste water washing rice, (5, 10, 15) ml of biological fertilizer of coconut water waste, (5, 10, 15) ml of biological fertilizer of tofu water waste, (5, 10, 15) ml of palm oil liquid fertilizer. The results showed that all biological fertilizer application based on organic liquid waste cellulolytic was able to give varied results on each parameter observed so that all wastes could be applied to pepper plants. Tofu wastewater biofertilizer with a dose of 10 ml give a good response to the production of pepper plants compared to other treatments.
Effects of Chronic Exposure to Particulate Air Pollution on Cardiovascular System: An Experimental Study Using Mice Models
Authors: Fauzie A K , Venkataramana G V
Published: December 2019

Our study investigated the chronic effects of short-term and medium-term exposure to urban particulate matter (PM) on cardiovascular system using murine models. Three-week-old Swiss albino mice (Mus musculus) were exposed to vehicular PM for five days (5D) and three months (3M), and some of them were kept in laboratory as control. Blood samples were analyzed using an automated hematological analyzer and cardiac tissues followed histopathological analysis to determine myocardial infarction as well as fibrosis and elastosis of coronary arteries. Results showed depletions (p < 0.1) in packed cell volume, red blood cells, and neutrophils after 3M of PM exposure. The density of neutrophils infiltrated in the myocardium was increased after 5D and 3M of PM exposure (p < 0.05). Higher thickness of arteriolar walls were found in almost all sized arterioles after 3M of PM exposure (p < 0.05) indicating higher content of collagen and elastic fibers, but no evidence of such after 5D of PM exposure. All parameters were compared to the control condition. We conclude that exposure to PM air pollution significantly altered cardiovascular system in animal models signaling that their blood and organs were badly injured.
The Impact of Making Canal Blocking on Growth Red Chili Plant Production (Capsicum Annuum L.)
Authors: Hapsoh  , Wawan  , Dini I R , Okendri B
Published: December 2019

Increased chili production continues to meet the demand for chili in an area. This study aimed to determining the importance of the influence of making canal blocking on water availability to increase growth and production of red chili plants. This study used a survey method, the method consisted of several stages including determining the location of sampling taken by purposive sampling, namely deliberate sampling with the required sample requirements. The results obtained from interviews and filling out the questionnaire stated that the water source they found for their plant water needs was the water available on the canal. The canal which was around the land was a secondary and tertiary canal, while the primary canal was located quite far approximately 300-500 m which was located around the edge of the road. The result of the analysis showed that making canal blocking in an effort to increase the availability of water there was no significant difference in the parameters of flowering and harvest age. Making canal blocking could increase plant canopy width, plant height, fruit weight/plant weight and fruit weight/m2, and canal blocking could increase water availability for plants so as to increase production to 20 tons.ha−1.
Potential Antibacterial Activity of Endophytic Fungi Penicillium sp. and Trichoderma sp. Derived From Mangrove Ceriops Tagal (Perr.) C.B.Robb and Bruguiera sp
Authors: Haryani Yuli , Hilma Rahmiwati , Delfira Noviza , Martalinda Tetty , Puspita Fifi , Friska Amelia , Juwita Dita , Farniga Analdi , Ardi Fri
Published: December 2019

This study aims to isolate endophytic fungi from the roots of mangrove from Riau Province’s Mangrove Forest and to screen some isolates with ability to inhibit the growth of pathogenic bacteria. A total of 28 endophytic fungi have been isolated from mangrove samples identified as Bruguiera sp. and Ceriops tagal (Perr.) C.B.Rob. Out of 28 isolates, 17 isolates (60,71%) were isolated from direct plating of sterile segment of root samples, while 11 isolates (39,28%) were isolated from suspension of grinded sterile segment in aliquot sterile sodium chloride. The potency of all isolated endophytic fungi to produce antibacterial agents were identified by doing antagonistic study against Escherichia coli, Staphylococcus aereus and Vibrio alginolyticus. The results showed that the highest antibacterial activity was produced by the isolates of C7B, B1C, C4E, and C4D with clear zones diameter of 17.91 ± 0.84 mm; 17.78 ± 0.83 mm; 17.66 ± 0.83 mm; 16.72 ± 1.15 mm, and 13.65 ± 0.27 mm, respectively. Based on macroscopic and microscopic analysis, those fungal isolates were identified as Penicillium sp. (C7B) and Trichoderma sp. (B1C, C4E, C4D).
Bioplastic Properties of Sago-PVA Starch with Glycerol and Sorbitol Plasticizers
Authors: Lusiana SW , Putri D , Nurazizah Ida Z , Bahruddin
Published: December 2019

This study describes the making of sago starch bioplastics using glycerol and sorbitol plasticizers with the addition of PVA and chitosan filler. It purposes to compare the effect between the addition of glycerol and sorbitol plasticizers. Bioplastic samples of sago-PVA starch have been made from a mixture of sago starch and chitosan solution that had been dissolved with acetic acid, glycerol/sorbitol plasticizer, and PVA was printed and left in the air for 24 hours, then dried in the oven for 12 hours. Testing the mechanical properties of tensile strength refers to ASTM D882 then tearing strength testing based on method C in JIS K 7128 standard. In addition to testing mechanical properties, morphological tests were also referred to as the JSM-6390A standard and biodegradability tests were carried out qualitatively with DIN EN ISO standards 846, and this Water Uptake test was referred to the ASTM-D570-98 standard. This study found that the glycerol plasticizers have a better value than other comparable materials in biodegradation testing with a value of 82.38%, However, in tensile strength test, sorbitol has better value than other material, namely with the best tensile strength value of 16.12 MPa, 142.05% in elongation, tear strength of 12,729 kgf/mm, and water uptake value of 10.34%.
Zeolite Na-P1 Derived from Palm Oil Mill Fly Ash: Synthesis and Characterization
Authors: Davina V , Utama P S , Saputra E , Bahri S
Published: December 2019

Palm oil mill fly ash is the solid waste of palm oil industry having silica content around 39 %. Synthetic Amorphous Silica (SAS) can be sinthesized from the fly ash by alkaline extraction method combine with sol-gel precipitation. In this research, the SAS was used as the raw material for zeolite Na-P1 synthesis by hydrothermal process. The synthesis process was done in stainless steel autoclave and the operating conditions were: pressure of 200 kPa, temperature of 120 °C and time of 8 hours. The aluminium source was Al2O3, the Si/Al ratio used were 5, 8 and 11 while the sodium hydroxide concentration were 1, 2 and 3 N. The zeolite obtained was characterized using XRD and the diffraction pattern was compared to the zeolite Na-P1 from other references.
The Perception of the Pekanbaru City Resident on Household Pesticides
Authors: Sutikno Agus , Rasyad Aslim , Amin Bintal , Mahatma dan Radit
Published: December 2019

The use of household pesticides depends on three important factors, including the effectiveness of active ingredients, application techniques, and the effects towards users. Therefore, there is a necessity for knowledge of pests and the application in order to minimize the danger posed. A person’s ability to understand various sources of information is influenced by their level of education. Facts regarding household pesticides are usually acquired from TV commercials as well as community experiences. This descriptive study was carried out by describing the relationship between the behavior of household occupants and the use of pesticides in controlling settlement pests, as well as explaining the relationship between the observed variables. The research population include residents that live in Pekanbaru City, specifically in the Districts of Tenayan Raya, Sail and Pekanbaru City. A determination of samples is carried out intentionally (purposive) with multistage sampling techniques (gradual sampling). Three factors determined the assessment of these households: clean, medium or dirty. The results of this study found that the resident of Pekanbaru City still considered the use of pesticides as harmless to their health and families, even though they knew of the toxicity and danger. Communities have a great desire to reduce the use of pesticides and find alternative methods for pest control.
Between Natural Tourism, the Booming of Laskar Pelangi Film, and the Image of Environmental Damage: Measuring the Perception of Regional Tourist on Bangka Belitung Tourism
Authors: Ibrahim I , Zukhri N , Rendy R
Published: December 2019

Image, impression, and tourist information sources are three important things to be explored in tourism development. Bangka Belitung which in the last few years has been trying to promote the economic sector based on post-tin and plantation tourism dealing with preparedness in management. This study wants to find out how tourists perceive Bangka Belitung, related to the tourist destinations, general views of tourists, and what issues are important to be considered by stakeholders. The study was designed to measure the perceptions of tourists from outside the area in looking at Bangka Belitung on the tourist side based on a quantitative design with a survey model. This research found that visitor arrivals to Bangka Belitung are basically planned as holiday trips from the beginning, not incidental trips. Another thing that was found is that the initial negative impression that emerged in general was environmental damage and the impression of a quiet area. The study also found that information sources for tourists in general are still conventionally based, namely relying on information from friends or family, not yet using a social media or technology base. It was also found the fact that culinary and historical visits have not become an important magnet in the planning of tourists’ trips. In the end, this study found the tendency to visit tourist destinations based on natural beauty, but it is somewhat different from Bangka, tourists in Belitung tend to visit more varied places as an implication of the popular Laskar Pelangi Film. The study concluded that at least the issues that were important as weaknesses were still felt by visitors, including limited transportation, facilities at tourist sites visited that were still minimal, local government support that was considered not optimal, and environmental damage that was considered to be potential for disrupting tourism.
Current Situation of Wastewater Treatment Plant for Sewage in Batam City
Authors: Aulia Sari Yusra , Pamadi Mulia
Published: December 2019

The aim of this research was conducted to identify the current situations of wastewater treatment plant for sewage in Batam City. This research uses descriptive qualitative methods to describe and analyze existing phenomena and real situations in the field. Descriptive method was chosen because the research conducted was relating to ongoing activities. The research instrument is the researcher, which is done through observation, interviews, and documentation. The results of this research are that the WWTP project is the right solution for Batam City in waste management, especially sewage. Batam is a pilot because there are not many cities that use integrated sanitation processing systems in Indonesia. WWTP provides benefits for environmental problems with natural and technological integration. Thus, the benefits of this research are references for researchers who want to discuss WWTP and are expected to help Batam authorities (BP) to develop the WWTP Project. The impact of this research in the field of civil engineering is the application of the Sustainable Urban Water and Sanitation Management.
Increasing the Environment Feel in Learning through the Double S Application
Authors: Islami Annisa Permata , Novitri Novitri , Syarfi Muhammad , Masyhur Masyhur , Afrianto Afrianto
Published: December 2019

In this era of globalization, English has become the second language for some non-English speaking countries. But in Indonesia, English is actually being a foreign language. This is because learning English in junior high school is monotonous and boring. So students’ interest in learning is reduced. The purpose of this study is to create a media for learning English so that it can increase interest the environment feel in learning and trigger students’ enthusiasm in learning English subjects. The learning media is spinning wheel and a jumbo puzzle with picture of the Siak Palace. This learning media was tested limited to students of Pekanbaru Az-Zuhra Islamic Middle School. Students were divided into 3 groups. The group representatives would spin the spinning wheel which contained the difficulty level of the quiz and the group would discuss to answer the quiz about the material. After that, the group with the correct answers would paste several puzzles on the board according to the score that they obtained from the previous quiz. From the results of this limited test, based on questionnaires given after learning, it appears that there is an increase in interest and enthusiasm of students in learning English through this media. This learning media in general can build interest and increase student motivation in learning English and can build skills to work together in learning groups.
Study of Microbial Air Quality at Surrounding Food and Leaves Waste Composting Facility (Case Study: Composting Facility – Faculty of Engineering, Universitas Indonesia)
Authors: Putri L V Y , Kristanto G A , Danumihardja I G
Published: December 2019

Composting process can increase bioaerosol concentrations that can cause health effect on human. The objectives of this research are to study bioaersol concentration and temperature and humidity factors bioaerosol concentration regarding food and leaves waste composting in Composting Facility – Faculty of Engineering. This study found that bioaerosol concentration of gram-positive bacteria, gram-negative bacteria, and fungi on 1st sampling location about 123,7 to 4699,6 CFU/m3, 0 to 17,67 CFU/m3, and 212,0 to 1484,1 CFU/m3, on 2nd sampling location about 141,3 to 2402,8 CFU/m3, 0 CFU/m3, and 300,4 to 1042,4 CFU/m3, and on 3rd sampling location about 17,7 to 2102,5 CFU/m3, 0 CFU/m3, and 53,0 to 1802,1 CFU/m3. This concentration was higher than related standard. Therefore, we need to do some handing technique to reduce bioaerosol exposure to human.
Characterization of Sludge Generated from Acid Mine Drainage Treatment Plants
Authors: Amanda N. , Moersidik S. S.
Published: December 2019

One of the wastes generated from coal mining area is the voluminous sludge, laden of metals. This sludge comes as precipitate which is produced from acid mine drainage active treatment ponds and always been disposed to the landfill. Limestone is one of the typical pH neutralization agents which is often used to bind the metal content of acid mine drainage in active treatment and will be settled at the bottom of the settling ponds. The goal of this study is to determine the potential utilization of acid mine drainage sludge in order to reduce the environmental problem caused by sludge accumulation so that this could become a valuable material. In this study, physical and chemical characterization from the sludge in solid form was carried out by laboratory analysis using SEM-EDS to see surface morphology, X-Ray Diffraction for mineralogy analysis, the chemical composition was done by using X-Ray Fluorescence and also BET method to see the surface area of the sample. The results of the characterization have shown that acid mine drainage sludge was very promising to be utilized as adsorbent material for removing pollutant in wastewater and further research is needed for the application to the wastewater technology.
Improved Peatlands Potential for Agricultural Purposes to Support Sustainable Development in Bengkalis District, Riau Province, Indonesia
Authors: Syahza Almasdi , Bakce Djaimi , Irianti Mitri
Published: December 2019

Bengkalis District in Riau Province, Indonesia, has potential peatlands covering 647,962.26 ha or 76.05% of its total land area. Peatlands not only have a function as direct life support, especially by providing area for agricultural purposes, but also ecological functions, such as flood and global climate control. Peatland areas will be arduous to restore if damaged. This condition certainly has negative impacts on the socio-economic aspects of the people living in the surrounding areas in particular. Sustaining the function of peatlands for the ecosystems essentially requires a detailed review of spatial feasibility and socio-economic impacts of peat swamp reclamation. Plants that have been cultivated on peatlands by the community are palm oil, rubber, coconut, coffee, and areca catechu (pinang). On wetlands, in particular, people do sago farming. One of the problems encountered in the utilization of peatlands is the low level of community participation in the development of peatland management policies. As a result, the implementation of these policies is still conflicting, prone to dispute and hard to do.