Indonesia Conference Directory

Corresponding Author
Humaira Ihda Rahmi

Institutions
(a) Fisika, FMIPA, Universitas Negeri Jakarta
*ce.rustana[at]yahoo.com
(b) Fisika, FMIPA, Universitas Negeri Jakarta
(c) Pusat Penelitian Fisika, Lembaga Ilmu Pengetahuan Indonesia

Abstract
In this research to reduce energy consumption of the electrolytic hydrogen production process, on the other hand still increase the efficiency, durability, and safety, we propose a catalyst from CO2 that decrease the use of energy and still produce the same amount of hydrogen. Wherein hydrogen and oxygen is produced from splitting carbonic acid (H2CO3) which comes from mixing CO2 and water (H2O). Based on the research conducted, hydrogen production rate when using CO2 as catalyst in lower voltage variation compensated the higher voltage. The best result regarding CO2 as catalyst after 300 minutes of electrolysis process, the lower voltage generate higher hydrogen volume.

Keywords
Hydrogen; electrolysis; CO2 as catalyst; carbonic acid

Topic
Physics

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

Corresponding Author
Fajar Vidya Hartono

Institutions
Universitas Negeri Jakarta

Abstract
This research aims to make sensor-based blind swimming aids that can be used during swimming training. This research uses qualitative approach. The data collection as conducted through observation, questioner, interview, and documentation. The research and development procedure carried out were the Borg and Gall models which consisted of 10 steps namely: (1) research and information gathering, (2) planning, (3) develop the initial form of the product, (4) initial field test (5) main product revisions, (6) main product field test, (7) operational product revisions, (8) operational field test, (9) final product revision, (10) dissemination and implementation. Development of sensor-based blind swimming aids can be used to training of motion skill, safe and comfortable, and can improve training results. After carried out research can be concluded that: (1) sensor-based blind swimming aids development product can be used for training of motion skill for blind swimming athletes, (2) sensor-based blind swimming aids development product effectively improve the results of swimming skills training.

Keywords
sensor; swimming aids; blind

Topic
Sport Science and Technology

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

Corresponding Author
Ambar Sulianti

Institutions
UIN Sunan Gunung Djati

Abstract
Allergic rhinitis decreases the sufferers productivity so that it affects emotions. This study aims to examine emotional dysregulation in people with allergic rhinitis. This research is a quantitative study by analyzing emotional regulation instruments for 60 productive age allergic rhinitis sufferers. Statistical analysis of Kruskal walls and post hoc Mann Whitney between aspects showed that there were 3 groups of emotional regulation levels. The results showed that patients with allergic rhinitis had low self-control and confidence. Respondents have moderate emotion managing, emotion modify, and concentration levels. There were no difficulties in evaluating emotions in the research subjects. Allergic rhinitis causes an embarrassed person to face other people when sneezing and snot. The condition of sudden sneezing and the urge to itch the nose makes it difficult for respondents to control themselves. However, patients with allergic rhinitis can still concentrate on their work and can manage and modify their emotions.

Keywords
allergic rhinitis, regulation of emotions, confidence, concentration, emotional modification.

Topic
Biology

Link: https://ifory.id/abstract/y4uXjNEtvT3W

Corresponding Author
Neneng Siti Silfi Ambarwati

Institutions
Department of Cosmetology, Faculty of Engineering, Universitas Negeri Jakarta, Jl. Rawamangun Muka, East Jakarta, Indonesia, 13220

Abstract
Background: Aloe vera is a medicinal plant that has been used since 1500 BC in many countries as a local medicine that has thick leaves flesh from the Liliaceae family. There are 75 compounds in Aloe vera gel have been found including 20 minerals (copper, iron, calcium, zinc, manganese, sodium, potassium, etc), 20 amino acids, vitamins (vitamins A, B, C, E, B12, folic acid ), salicylic acid, and water. Aloe vera was widely used for its antibacterial, anti-viral, anti-inflammatory, the lack of itching, and help prevent skin ulcers. Purpose: This study intends to investigate the effect of fresh Aloe vera gel mask in the reduction of scalp dandruff. Methods: Sampling was done by purposive sampling method as many as 10 people suffering from dry dandruff divided into 2 groups, namely 5 were given care using Aloe vera gel mask and 5 were given control mask treatment. Each sample received 3 treatments a week for 4 weeks. Observations before and after treatment were carried out by experts using a research instrument sheet assisted by a skin and hair analyzer. Test requirements analysis using the normality test and homogeneity test, and data analysis using the T-test. Results: The test results show data are normally distributed and homogeneous, t-count (3.376) > t-table (1.86). This showed that there the influence the used of Aloe vera to reduce dandruff on scalp. Obtained the average value of reduction in dandruff with use fresh Aloe vera gel mask was 0.800 greater than using control (0.699). Conclusion: The results of this study indicate that there influence of used Aloe vera gel mask on reduced dandruff on the scalp.

Keywords
fresh Aloe vera gel mask, reduced dandruff

Topic
Pharmacology

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

Corresponding Author
Jafar Amiruddin

Institutions
(a) Department of Fire Safety Engineering, Universitas Negeri Jakarta
p3iunj[at]yahoo.com; jafar_amiruddin[at]unj.ac.id
(b) Department of Mechanical Engineering Education, Universitas Negeri Jakarta
(c) Fire & Rescue Management Office, DKI Jakarta

Abstract
This study aims to analyze the risk of occupational safety of firefighters using the AS / NZS 4360: 1999 semi-quantitative analysis method. The research was conducted at the East Jakarta Fire & Rescue Management Office. There are five stages of firefighters work that are analyzed: (1) Preparation / before departure, (2) Travel to the location of the fire, (3) Arriving at the location of the fire, (4) Extinguishing fires, (5) Post-fire suppression. The results showed: (a) Risk of work with acceptable categories as many as 13 risks, (b) Priority categories as many as 4 risks, (c) Substantial categories with 3 risks, (d) priority 1 categories as many as 5 risks, (e) very high category as many as 8 risks.

Keywords
risk of occupational safety, firefighters, fire prevention service

Topic
Industry Engineering

Link: https://ifory.id/abstract/TNEFC9KJ4Bvg

Corresponding Author
Anggi Restu Fauzi

Institutions
Universitas Pendidikan Indonesia

Abstract
Economic dispatch is one of the important problems in the operation of electric power system. The purpose of this paper is to determine optimal generation scheduling with minimum fuel costs. The proposed fuzzified particle swarm optimization algorithm is a combination of fuzzy logic incorporated in the particle swarm optimization algorithm. In this paper, the performance of the fuzzified particle swarm optimization algorithm is compared with the conventional method, the lagrange multiplier method. 6 thermal power plants are used as input data for simulation. The results show that the proposed method can provide a more accurate solution and has the potential to be applied to other electric power system optimization problems.

Keywords
economic dispatch, lagrange multiplier method, fuzzy logic, particle swarm optimization

Topic
Electrical Engineering

Link: https://ifory.id/abstract/QwcbqGuX4yag

Corresponding Author
I Wayan Repiyasa

Institutions
S.3 Pendidikan Olahraga Program Pascasarjana Universitas Negeri Jakarta

Abstract
This research has the goal of producing products such as exercise books and models in the physical condition of child disability. in this study using Borg and Gall method consists of ten steps and Research subjects are elementary students in SLB B PTN Bali. The model consists of 4 models with 40 items which have several times through the expert evaluation, testing and revision. This research uses pretest and posttest with significance level 0,05. The result of physical game exercise based on traditional game for children with disability between pretest and posttest obtained result tO = 9.595 bigger than price tt = 0.000 (at significance level 0,05), hence null hypothesis rejected. So it can be concluded that there are significant differences between pretest and posttest results-based endurance exercise traditional games for children disabilities. Judging from the results of the physical condition of the model-based practice of traditional games for children of primary school age disabilities are effectively used to improve the results of the childs physical condition.

Keywords
Model Exercise; Physical Condition; Child Disability; Traditional Games.

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/JMY3xLfPWHAc

Corresponding Author
Busro Busro

Institutions
UIN Sunan Gunung Djati Bandung

Abstract
Encyclopedia anatomy is an android application to introduce anatomy, equipped with a search feature, multiple choice quizzes and guess image quizzes. Due to some anatomical term is uptake from foreign languages and frequently typing errors by smart phone user, then search feature in this application implement fuzzy string matching method which use levenshtein distance algorithm. However, the results obtained are still not accurate, then added method of splitting and indexing so the results are more accurate and search process fast enough. Due to more simple than book and supported by a good appearance, this application is able to get a positive response from the users.

Keywords
Anatomi, Typing Errors, Fuzzy String Matching, Levenshtein Distance, Splitting, Indexing

Topic
Computer Science

Link: https://ifory.id/abstract/8XGt2Y4TMNqA

Corresponding Author
Andriani Parastiwi

Institutions
Politeknik Negeri Malang

Abstract
Modified cooperative learning is a class-based active learning strategy, where students work on problems posed by lecturers, first individually, then in small groups, and finally as class discussions. This method allows students to express their reasoning, reflect on their thoughts, and get immediate feedback about their understanding. In this study, an investigation of the quantity and quality of student involvement was conducted in the Computer Programming Laboratory course in the electronics engineering department. Lecture material is prepared to support cooperative learning as well as class observations of students conducted by cooperative learning in the course. The pattern of student involvement was observed using the student behavior observation form that was developed and validated. Data triangulation was done with student perception survey data. The results showed that matching timing varied depending on the topic with an average of 20 minutes for the concept presentation by the lecturer. Student involvement is very high in the form of writing and discussing groups and classes. Triangulation of student perceptions states that students feel actively involved fully in the learning process.

Keywords
cooperative learning, computer programming, eengineering

Topic
Electronics Engineering

Link: https://ifory.id/abstract/fhAwPmRq8Kpz

Corresponding Author
Dana Marsetiya Utama

Institutions
a) Departement Industrial Engineering, University of Muhammadiyah Malang, Jl. Tlogomas No. 246, 65144 Malang, East Java, Indonesia
*dana[at]umm.ac.id
b) Vocation Faculty, University of 17 Agustus SurabayaJl. Semolowaru, Menur Pumpungan, Sukolilo, Surabaya 60118 East Java, Indonesia

Abstract
Recently, the manufacturing sector produces the primary source of carbon emissions. Therefore, it must consider the environmental aspect and economic impacts. Carbon emissions have become one of some an essential indicator of the company-s. One of some way to minimize carbon emission is scheduling appropriately. This study aims to reduce carbon emission in the permutation flow shop scheduling problem (PFSP). This problem considers the sequence of dependent set up and removal. We developed the Hybrid Binary Dragonfly Algorithm (HBDA) to solve that issue. In the HBDA, we offered 10% search agent use NEH algorithm. NEH is one of the useful heuristic algorithms. In this study, we did some numerical experiments. It did explore the best algorithm parameter and algorithm effectiveness. Some popular algorithm compares algorithm HBDA. The results show, there is some scenario to decrease carbon emissions in several various problems. Moreover, The HBDA proved useful to reduce carbon emission compared to other algorithms.

Keywords
Carbon Emission; Flow shop; Scheduling; Hybrid Binary Dragonfly; Metaheuristic

Topic
Industry Engineering

Link: https://ifory.id/abstract/7RrFkq8zxYum

Corresponding Author
Dana Marsetiya Utama

Institutions
a) Departement Industrial Engineering, University of Muhammadiyah Malang, Jl. Tlogomas No. 246, 65144 Malang, East Java, Indonesia
*dana[at]umm.ac.id
b) Vocation Faculty, University of 17 Agustus SurabayaJl. Semolowaru, Menur Pumpungan, Sukolilo, Surabaya 60118 East Java, Indonesia

Abstract
Recently, the problem of minimizing carbon emissions in manufacturing has become a focus of much research. One of the efforts that were successfully carried out was managing the sustainable economics order quantity (SEOQ). However, several SEOQ had assumption such as (1) warehouse costs are ignored, (2) warehouse emissions are avoided, and (3) warehouse costs are ignored. In this paper, we developed the SEOQ model with warehouse costs and capacity limits. There are two proposed SOQ models. Model 1 was the SEOQ model with warehouse costs and carbon emissions. At Model SEOQ 2, this model considered warehouse costs, carbon emissions, and capacity. We also proposed procedures to minimize total inventory costs. Finally, a numerical experiment was conducted to test the model. Based on numerical experiments, the proposed model useful to solve SEOQ problems with warehouse costs and capacity limits.

Keywords
SEOQ; EOQ; carbon emissions; Inventory; capacity limits

Topic
Industry Engineering

Link: https://ifory.id/abstract/vYnpmcBAV6dF

Corresponding Author
Busro Busro

Institutions
UIN Sunan Gunung Djati Bandung

Abstract
One of the Android Application usability is to improve the quality of Academic Information System. Users will be interested to see when the initial appearance of an Android Application is visually comforting. Various ways have been done to improve the quality of Android Applications display with the aim of generating users and Android Application visitors satisfaction during surfing in the Android Application. This research use Kansei Engineering method which involved user emotional strength to get design materials that had strong influence in the design concept of Android Application. Kansei Engineering Type I is using KEPack methodology. It contains stages from research process until producing the new product which is suitable with the concept of emotion Android Application users. The new product is a recommendation from Android Applicationis proposal matrix. This research process use 17 Kansei Word and 12 specimen as a sample of Android Applicationis . Kansei Word is selected from words which is related to Android Application display. While as sample of specimens or Android Application is selected based on the differences of characteristics between each Android Application. This study involved 35 participants. Questionnaire results from participants will be processed by using multivariate statistical analysis that is Coefficient Correlation Analysis (CCA), Principal Component Analysis (PCA), Factor Analysis (FA) and Partial Least Square (PLS) analysis. As a result, this procedure will produce a recommendation of E-Learning display design.

Keywords
Android Application, Kansei Engineering, KEPack.

Topic
Computer Science

Link: https://ifory.id/abstract/FVc8tuGbQdjU

Corresponding Author
Mindit Eriyadi

Institutions
(a)Electrical Engineering Department, Politeknik Enjinering Indorama, Purwakarta, 41152, Indonesia
*mindit.eriyadi[at]pei.ac.id
(b)Electrical Engineering Deaprtment, Faculty of Vocational Eductaion and Technical, Universitas Pendidikan Indonesia, 40154, Bandung, Indonesia.

Abstract
This research evaluates public street lighting with case studies on Jalan Dr. Setiabudhi Bandung, 4,980 kilometers (km) from the start of the Lembang direction to the Cihampelas direction. Tests have been carried out by measuring illuminance values (lux) on 114 light points on the road. Most lights are assumed to use typical SOX with 135 watts of power, voltage range of 220-240 volts (v), frequency of 50-60 hertz (Hz). Measurements and calculations was done with result the height from the base of the pole to the lamp varies from 7.04 meters (m) to 10.51 m with an average of 9.8 m. Observations and measurements along the road also recorded as many as 29 lights were off, 15 lights were slightly covered by trees, and 23 lights that were not blocked directly illuminated the road. There are a total of 51 of 114 lighting poles whose luminance values are below the Standar Nasional Indonesia (SNI). The total 63 points of the luminaires that meet SNI, as many as 50 points of luminance value are greater than 15 lux. The shortest distance between light poles is 22.8 m, the longest is 273 m with a mean of 40.9 m. Evaluation shows both in terms of illuminance, distance between poles and power and the type of lamp used still has the opportunity to be redesigned to be more efficient. Redesign is done using dialux evo more efficiently. Opportunity optimization by implementing the Particle Swarm Optimization (PSO) algorithm was proposed in this research.

Keywords
Street Lighting; Redesign; Particle Swarm Optimization

Topic
Electrical Engineering

Link: https://ifory.id/abstract/WfTZAcG4PaMg

Corresponding Author
Agus Kurniawan

Institutions
a) Program Studi Pendidikan Ilmu Pengetahuan Alam, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
b) Program Studi Teknologi dan Informasi, Sekolah Menengah Kejuruan Daarut Tauhiid, Jl. Gegerkalong Girang Kav. 25-26, Bandung 40154, Indonesia
c) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

*aguskurniawan[at]student.upi.edu

Abstract
The purpose of this study is to obtain an overview profile of the affective abilities of vocational students about the discourse of electrical energy conservation. The research method used is qualitative research which aims to explain the phenomenon of problems experienced by students in understanding the concept of electricity. Research activities are carried out in the odd semester of the school year 2017/2018. The subjects of the study were the students of class X in one of the Private Vocational Schools in Bandung consisting of one class chosen at random (random sampling). The results showed that the profile of affective ability which is a result of representation of the value or energy-saving attitude of students in SMK S Bandung is still low. This can be seen from the value of the average achievement of affective goals the willingness to respond, satisfaction in response, acceptance of value, preference for a value, commitment, and conceptualisation of values of 0.49 which is still in the low category. This shows that physics learning, especially on the concept of electricity at the SMK level has not been oriented towards affective goals.

Keywords
Electrical energy conservation; Affective goals; Vocational school

Topic
Physics

Link: https://ifory.id/abstract/GYXVU62wuntc

Corresponding Author
Epa Paujiah

Institutions
a) Department of Biology Education, Faculty of Tarbiyah and Teacher Training, UIN Sunan Gunung Djati Bandung
Jl. Soekarno Hatta, No. 749, Cimincrang, Gede Bage, Bandung (Kampus II)
b) Departement of Animal Biosciences, Bogor Agricultural University
Kampus IPB Dramaga, Jl. Raya Dramaga, Babakan, Dramaga, Bogor, Jawa Barat, 16680
c) Departement of Water Resources Management, Faculty of Fish and Fisheries, Bogor Agricultural University
Kampus IPB Dramaga, Jl. Raya Dramaga, Babakan, Dramaga, Bogor, Jawa Barat, 16680

*epapaujiah[at]uinsgd.ac.id

Abstract
Length-weight relationships or condition factor in R. aspro species were analyzed separately by sex and location. This study aims to determine the growth patterns and Length-weight relationships in the R. Aspro fish species that were captured in the Cisadea River, West Java, Indonesia. This research was conducted from June 2012 to February 2013. Fish sampling from the field was carried out for six months which took place from June to November 2012. Sampling was carried out at the station that had been determined by Purposive Sampling which could represent the upstream, middle and downstream of the river. The parameters measured consisted of growth patterns and factors conditions for fish (Length-weight relationships). The data obtained is then analyzed using the Excell 2007 computer program and uses the FAO-ICLARM Stock Assessment Tool II (FISAT II) program. The results showed that the correlation coefficient (r) R. aspro showed a value of 0.90 for male fish and 0.78 for female fish. The equation of the relationship between the length of weights in R. aspro and the different sexes all has a positive allomatic growth pattern (b> 3). Based on location, the fish growth pattern has positive and negative alomatric patterns. There are differences in conditions both based on gender and location. The relationship between R. aspro fish length is allometric with condition factor values ranging from 0.16-2.05. The results of this study can be used as baseline data for the management of aquatic resources in these locations or other locations.

Keywords
Fish, Growth, R. aspro, Condition Factor, Cisadea River

Topic
Biology

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

Corresponding Author
RIDHA HUSLA

Institutions
a) Department of Petroleum Engineering, Trisakti University, Jl. Kyai Tapa No. 1, Jakarta 11440, Indonesia
*ridhahusla94[at]gmail.com

Abstract
RM field is one of the fields located in Java Island. RM Field has great potential to be developed, In the RM field water injection has been done to increase the value of oil production. To find out the effect of heterogeneity on the RM field, dykstra parson was analyzed. The layers analyzed in the RM field were layers 22, 23 and 24. The results of the analysis for the Vdp value at layer 22 is 0.828, the Vdp value at layer 23 is 0.814, and the Vdp value in layer 24 is 0.812. With the dykstra parson analysis, it can be seen that RM field reservoirs tend to be heterogeneous, this is seen from the Vdp value which approaches the number 1, which is equal to 0.812 to 0.828 In addition, a mobility ratio analysis was carried out using rocktype 1 on the RM field and the M value on rocktype 1 was 0.3429. with a value of M <1 which means it can produce high sweeping efficiency and produce good oil recovery.

Keywords
Heterogeneity, Dykstra Parsons, Mobility Ratio, Water Injection

Topic
Industry Engineering

Link: https://ifory.id/abstract/hNvWb3MQ7gfR

Corresponding Author
Pri Riznaya

Institutions
Universitas Padjadjaran

Abstract
The purpose of this research was to determine the effect of energy and protein balances on the digestive value of female garut lamb. The variables are TDN (Total Digestible Nutrien) value, Crude Fiber (CF) digestive value and Crude Protein (CP) digestive value. The treatments given included R1 (12% protein and 60% TDN), R2 (12% protein and 65% TDN), R3 (14% protein and 60% TDN), R4 (14% protein and 65% TDN), R5 (16% protein and 60% TDN), and R6 (16% protein and 65% TDN). The feed are arrange using field grass, fine bran, onggok, soy sauce pulp, coconut cake, and premix. The design of the room uses a Completely Randomized Design (CRD), with 4 (four) replications. Data analysis used variance analysis and Duncans multiple analysis. The results showed that various protein and energy ratio had significant effect on TDN (Total Digestible Nutrien) value, Crude Fiber (CF) digestive value and Crude Protein (CP) digestive value.

Keywords
: Garut lamb, protein and energy balances, digestive value

Topic
Biology

Link: https://ifory.id/abstract/cr2eDUGRjKJu

Corresponding Author
Bambang Prasetya Adhi

Institutions
(1,2,3) Department of Informatics Education Faculty of Engineering Universitas Negeri Jakarta
*bambangpadhi[at]unj.ac.id

Abstract
Technology support the business processes of an organization. Advanced and established organizations have a variety of activities that are well managed with a framework or an architecture. Enterprise architecture is an illustration of how a business process can be managed with the support of various technologies in its environment. Vocational High School is one of the organizations in the field of education that needs to develop and adapt to the times. Many of his activities are now starting to switch from using manual technology. Currently data is one of the most important things to manage because it has value as an example for the accreditation process. In addition, increasing industrial and market demand needs to be taken seriously. Vocational education enterprise architecture is an architecture that can later build business processes in vocational secondary schools to facilitate organizations in responding to such rapid development. Vocational Education Enterprise Architecture Framework (VEEAF) was developed using the Federal Enterprise Architecture Framework (FEAF).

Keywords
business processes; Enterprise architecture; Vocational High School; Vocational Education Enterprise Architecture Framework (VEEAF)

Topic
Computer Science

Link: https://ifory.id/abstract/TzqfQW4xcvmw

Corresponding Author
Nuria Reny Hariyati

Institutions
Akademi Farmasi Surabaya

Abstract
International databases are currently abundant, one of which is a database on the study of radicalism in international journals. This study aims to explore the study of international journals related to the theory, methodology, and practice of radicalism. The method used in this study is qualitative. The data source used is data from online international journals. The results and discussion of the study indicate that categorization is as follows. Radicalism in the field of politics, radicalism in the field of education, radicalism in the cultural field. Radicalism in politics occupies 61 percent, radicalism in education occupies 29 percent, and radicalism in the cultural field occupies 10 percent. Thus, it is concluded that the highest radicalism is in the political field.

Keywords
radicalism, database, international journal

Topic
Computer Science

Link: https://ifory.id/abstract/CvefLZ7EFBa4

Corresponding Author
Edi Mulyana

Institutions
UIN Sunan Gunung Djati Bandung

Abstract
The impressed current cathodic protection is one of the effort to prevent a metal from corrosion by supplying electricity to metal objects. However, the protection system that supplies electricity must always be monitored so that the electricity intake to the metal object is sufficient to protect it from the corrosion. The way how to monitor the electricity intake to the metal is to read the current intaking on the metal. To read the electric current more easly is to use an application software. This research talk about the application design to display the electric current intaking on the metal through the computer screen. In order to read the electric current directly, the Advantect Data Acquisition Modul (ADAM) devices are used. The results show that the appliation is able to display the value of protection current for iron plate steel with size 30x10 cm are between 0.15 A to 0.18 A while for iron plate with a size of 30x13 cm are between 0.20 to 0.24 A. These values also avoid the over protection.

Keywords
Cathodic protection, Corrosion, Data Acquisition Module, Application

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/QkfUdVLtT2rx

Corresponding Author
Trias Megayanti

Institutions
Universitas Pendidikan Indonesia

Abstract
Green open space performs an important role to enhance the quality of community living as well as being beneficial in maintaining the ecosystem. It is also having a prominent role in disaster risk management applied to densely populated settlements. Nevertheless, social awareness about the essential role and utilization of green open space is still a concern. The aim of this paper is to deliberate the result of the river banks potential analysis that serves as a green open space and communal space. This study is conducted by the Participatory Rural Appraisal (PRA) methods, which was carried out in collaboration with the local community group, to asses the potency of green open space at Negeri kaler Village, Purwakarta Regency, Indonesia. The result shows that community empowerment in optimizing public space, requires a critical awareness process for the local community to maintain environmental sustainability and social interaction. It is also shows the mapping of green open space at the village. The results from this study is being used as guidelines for designing green open spaces with community architecture methods based on the needs of the local community.

Keywords
green open space, community architecture, communal space

Topic
Architecture

Link: https://ifory.id/abstract/f4BabdMeyuHX

Corresponding Author
Vingky Zulfa Asria

Institutions
Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia
*vingky22[at]upi.edu

Abstract
This study aims to investigate whether or not there the difference between students- mathematics concept comprehension ability by using Think Pair Share (TPS) approach and by using direct learning reviewed based on their preliminary ability (high, medium, and low level). This research was a quasi experiment by using posttest only control group design that aimed to investigating the cause and effect by treating one of classes, and comparing the result of the class that was treated differently. Methods of data collection in this study through observation, documentation and test, involving 42 students of senior high school in Pekanbaru in the even semester of 2017. T test was used to analyzed the data. The results showed that there are difference between students- mathematics concept comprehension ability by using TPS approach and by using direct learning reviewed on their preliminary ability to learning outcomes. Classes with TPS approach give better learning outcomes than the ones in direct learning classes. Thus, in general the implementation of TPS approach influenced students- mathematics concept comprehension ability reviewed based on their preliminary ability at Senior High School in Pekanbaru.

Keywords
Think Pair Share, Students- Mathematics Concept Comprehension Ability, Mathematics Preliminary Ability

Topic
Mathematics

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

Corresponding Author
Tri Handayani Kurniati

Institutions
Biology Study Program, Faculty of Mathematics and Natural Sciences, Jakarta State University.
Jl, Rawamangun Muka, Rawamangun,. East Jakarta 13220. Indonesia

Abstract
Biosurfactants are surface-active molecule produced by microorganisms and have several advantages over the chemical surfactants. The objective of this research was to obtain biosurfactant-producing bacteria from hydrocarbon contaminated soils in Jakarta Bay and to observe their biosurfactant activity through emulsification capacity and surface tension reduction capability. Overall, 19 isolates were screened for biosurfactant production by hemolysis assay, drop collapse assay and oil spreading assay. The result showed that 12 strains gave positive results on the screening tests and were determined as biosurfactant-producing bacteria. Three strains (TKY 3, TKY 14 and TKY 19) had the best biosurfactant activity. Isolate TKY 3 has the best emulsification index (E24) with a value 57±0,57%, while the lowest surface tension value was achieved by two strains ( TKY 19 and TKY 14 ) with the same value of 37,84±1,45 mN/m.

Keywords
bacteria; biosurfactant; emulsification; screening; surface tension

Topic
Biology

Link: https://ifory.id/abstract/Kj7xubBmL6HF

Corresponding Author
Neneng Windayani

Institutions
Department of Chemistry Education, UIN Sunan Gunung Djati Bandung
Jl. A. H. Nasution No. 105, Bandung 40614, Indonesia

a)E-mail: nenengwinda.ftk[at]uinsgd.ac.id

Abstract
This study aims to make facial wash gel made from Aloe vera L. as a natural surfactant. The experimental method used included the stages of analysis of Aloe vera extract samples, addition of carbomer 960 with a percentage of 0.5%, 0.7% and 2%, selection of essential oils according to facial skin requirements, testing of secondary metabolites contained in Aloe vera extract. Furthermore, making aloe gel as a facial wash by utilizing the secondary metabolites contained in Aloe vera that have characteristics in accordance with the Indonesian national standard (SNI). The results showed that Aloe vera extract used positively contained flavonoid, triterpenoid, saponin, and polyphenol compounds. It has been successfully made the best facial wash gel with formulation obtained in addition of carbomer 960 with a percentage of 0.7%. The organoleptic results of Aloe vera gel as facial wash include having an aroma in accordance with the added essence, soft texture, gel form, cloudy white color, feeling cool or cold when applied to facial skin, without foam and having a pH of 5.

Keywords
Aloe vera gel, facial cleanser, natural surfactant, secondary metabolite

Topic
Chemistry

Link: https://ifory.id/abstract/q8j3Nm2LRxa4

Corresponding Author
Ni Made Ayu Suardani Singapurwa

Institutions
Department of Food Science and Technology, Warmadewa University

Abstract
‘Pedetan- is one of the food products of the traditional Balinese fish sardine which is processed by the community in the Jembrana Regency of Bali Province. This study aims to determine the antimicrobial activity of garlic and kaempferia galangal in inhibiting the growth of Aspergillus sp. which can contaminate the sardine fish Pedetan, The study was conducted by isolating Aspergillus sp. from Pedetan and testing the inhibitory power of garlic and Kaempferia galangal The results showed that the extract of garlic and Kaempferia galangal can inhibit the growth of Aspergillus sp. From the results of SEM observations it was found that garlic and kaemfiera were able to damage the Aspergillus sp. Mycelia. compared to control treatment. Garlic extract and kaempferia galangal can inhibit the growth of Aspergillus sp. because they contains bioactive compounds that are antimicrobial.

Keywords
Aspergillus sp., Garlic, Kaempferia galangal

Topic
Biology

Link: https://ifory.id/abstract/vVYnCDG9L8jW

Corresponding Author
Anak Agung Ayu Putri Ardyanti

Institutions
STMIK Primakara
Jalan Tukad Badung No 135 Denpasar Bali
putri.ardyanti[at]primakara.ac.id

Abstract
The rapid increase from the industrial revolution 4.0, affected changes in business patterns in Indonesia, including Bali. This research aims about how to create digital business with Lean Startup Machines and Questionnaire User Experience method (UEQ). This business originated from the fact that women workers in Bali had difficulty to buy traditional ceremonial equipment. We had to research almost one year from the customer and market before built the application. First at all, we must concept design of website. Lean startup model is designed to minimize the risk of returns from products made for market needs. One of tools in this method for customer validation is the validation board. From the research obtained from the core assumptions to survey directly prospective customers for the minimum success criteria that are required. This research had 70% of success required which up to 3 times for the pivot. While the results of the Questionnaire User Experience method (UEQ) the opinion of the community about the system that had made get the overall average impression of Attractiveness (1.71), Persicuity (1.35), Efficiensy (2.66), Dependability (0.92), Stimulation (1.28) dan Novelty (0.69).

Keywords
Startup, Bali, I-Canang, UEQ, Lean Startup Machine

Topic
Information Engineering

Link: https://ifory.id/abstract/RXh2MzVUrdqp

Corresponding Author
arinda ristawati

Institutions
a)Petroleum Engineering Departement, Faculty Of Earth
Technology And Energy, Universitas Trisakti,, Jalan Kyai
Tapa No.1 Grogol-Jakarta Barat 11440, Indonesia
* arinda[at]trisakti.ac.id

Abstract
Surfactant injection is one of the EOR methods used to increase oil recovery. Using of surfactants is intended to reduce the interface tension between oil and water. The types of surfactants commonly used are oil-based surfactants, such as petroleum sulfonate. This condition causes the price of surfactants very dependent on oil prices. As efficient alternative, research on plant-based surfactants sourced from nature is being developed. Like the type of surfactant that will be used in this study is Sodium Lignosulfonate (NaLS) sourced from bagasse waste. The purpose of this study is to add reference of the characteristics of the NaLS surfactant to be used optimally. The screenings in this experiment were Aqueous Stability test, phase behavior test, and IFT test on 1.5% NaLS concentration and high salinity 70,000 ppm Nacl. The results of aqueous stability test is transparent, the results of phase behavior test is middle phase emulsion with an emulsion percent of 8.75%, and the results of IFT test obtained value of 1.98 mN/m. Based on these results, surfactants meet the screening parameters so can proceed to the injection stage for determine the value of recovery factor. Results of recovery factor for bagasse waste NaLS surfactant injection is 4.4%.

Keywords
Bagasse NaLS, High Salinity, Recovery Factor,

Topic
Environmental Engineering

Link: https://ifory.id/abstract/KGAeZrcuy4aD

Corresponding Author
Soni Setiadji

Institutions
[1]Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung, Jl. A.H. Nasution No.105 Bandung, West Java, 40614, Indonesia.
[2]Department of Chemistry Education, UIN Sunan Gunung Djati Bandung, Jl. Cimincrang, Cimenerang, Panyileukan, Bandung, West Java, 40292, Indonesia.
[3]Master Program in Computational Science, Faculty of Mathematic and Natural Science, Institut Teknologi Bandung, Jl.Ganesha No. 10, Bandung, West Java, 40132, Indonesia

Abstract
NaX zeolite is a synthetic zeolites with faujasite framework that has large pores, which it is largely used as adsorbents. NaX zeolite was synthesized using silica which was extracted from elephant grass. The silica was isolated from elephant grass using its ash with conventional ignition method, with NaOH as solvent. The extracted silica purity is 86,33%. NaX zeolite was synthesized with 3.5 Na2O : Al2O3 : 2.9 SiO2 : 150 H2O as molar ratio in hydrothermal condition at 90 °C for 15 hours. Synthesized zeolite were then characterized using FT-IR to confirm the formation of zeolite based on chemical bonding that appears on the spectrum, XRD to confirm the framework structure of the formed zeolite, and SEM to obtain its morphology. Based on those analysis, it is known that the result of synthesis process is zeolite with NaX crystal structure and octahedral morphology with crystal sizes range 1-5 µm.

Keywords
silica extraction, elephant grass, zeolite synthesis, NaX zeolite, hydrothermal method

Topic
Material Science

Link: https://ifory.id/abstract/eNPYKBDtxX3R

Corresponding Author
Syukur Daulay

Institutions
Departemen Teknik Metalurgi dan Material, Fakultas Teknik, Universitas Indonesia
*syukur.daulay71[at]ui.ac.id

Abstract
One of the easy and cheap solar cell is Dye sensitized solar cell (DSSC) that use dye to harvest sun-s energy. It has drawback in low efficiency because of electron recombination occurrence and low transparence of photoanode. Reduced graphene oxide as derivative of graphene was hoped to overcome the problems. This research is aimed to study the effect of nanocomposite Titanium Oxide-reduced Graphene Oxide (TiO2-rGO) as photoanode to the efficiency by varying the percentage of rGO that fabricated by Hummer-s Method. The rGO from Graphite is successfully fabricated that confirmed from FTIR and SEM and TiO2-rGO nanocomposite has been fabricated and characterized using UV-Vis. The nanocomposite has been used as photoanode that affect the efficiency. The result shows the effect of percentage of rGO on the performance. The efficiency of solar cell is measured using solar cell simulator and give result for 0% rGO resulted 1.45 % efficiency and 0.664% that for 1% rGO. The moderate result is 2% of rGO that resulted 0.9 % efficiency. The pattern is not regular but the effects is counted

Keywords
DSSC, Nanocomposite, rGO, efficeincy

Topic
Material Engineering

Link: https://ifory.id/abstract/UWpdzvJc8wFR

Corresponding Author
winda setya

Institutions
a) Department of Physic Education, Faculty Tarbiyah and Teacher Training, UIN Sunan Gunung Djati Bandung
Jl. Soekarno-Hatta no. 750, Gedebage, Bandung
*suratwindasetya[at]uinsgd.ac.id

Abstract
Android gives a great revolution to the world of education to develop learning applications that facilitate its use to study anywhere and anytime. This study aims to make Android-based media using app-inventor on glass and lens material. The development of this media uses R & D (research and development) research and development methods which consist of 4 stages, namely the analysis phase, design stage, production stage, and evaluation stage. The results of using Android-based media have an average value of questionnaires from material experts, media experts, and small-scale trials categorized very well close to 50%. Based on these results it can be stated that the lens and glass media based on Android can be used as a medium of learning in the classroom. The development of this Android-Based Physics Application is expected to be an alternative for educational institutions or educators to develop learning media that use multimedia.

Keywords
Android, Media, Glass, Lens, Physic

Topic
Physics

Link: https://ifory.id/abstract/HYDaKEVPC4Tq