Indonesia Conference Directory

Corresponding Author
Chairul Irawan

Institutions
Department of Chemical Engineering, Faculty of Engineering, Lambung Mangkurat University
Jl. A. Yani Km. 36, Banjarbaru, Kalimantan Selatan, 70714 Indonesia
* cirawan[at]ulm.ac.id

Abstract
Detergent wastewater contains high phosphate concentrations, so that if the wastewater is directly disposed of into a ditch or river then the wastewater can cause water pollution and cause eutrophication. Layered double hydroxides (LDHs) are synthetic materials with positively charged pyruvate type coatings of mixed metal hydroxides by chemical precipitation method. The purpose of this study is to find out the efficiency of phosphate-containing detergent wastewater adsorption using Mg-Al(NO3) LDH. The morphological structure of LDH by the SEM-EDS analysis method shows a loose lamellar structure with a particle size of about 1 μm, and the composition of Mg-Al(NO3) LDH by the XRF analysis method shows that the Mg and Al elements dominate more than other elements. Batch adsorption experimental conducted for detergent wastewater, which is where in this study the phosphate content was of ca. 51.50 mg / L The equilibrium time of the adsorption process using Mg-AL(NO3) LDH is achieved after 60 minutes. The mole ratio of Mg : Al composition of LDH in the adsorption process has slightly affects the decrease in phosphate shown by a mole ratio of 1 : 1, 2 : 1 and 3 : 1 using Mg-Al (NO3) LDH as adsorbent at dose of 1 g, stirring rate of 100 rpm, 60 minutes, and at room temperature that is equal to 4.15 mg/L, 4. 14 mg/L and 4.08 mg/L, respectively. Mg-Al(NO3) LDH is promising an adsorbent for phosphate removal in detergent wastewater.

Keywords
adsorption; detergent wastewater; LDH; phosphate

Topic
Engineering

Link: https://ifory.id/abstract/N67fZECaLuFk

Corresponding Author
Nur Chanifah

Institutions
Brawijaya University

Abstract
Sukodadi is a village that has great potential of diversity, especially in religion and faith (Islam, Hinduism, Catholicism) which are embraced by its citizens, and even there are also local faiths that can coexist. The practice of tolerant life of Sukodani society can be used as a role model for the development of a harmonious life in Malang, but the great potential has not been realized by the village community. This condition is caused by several factors, including low human resources, especially related to potential tolerance, lack of encouragement from the government, and other public facilities. Based on those problems, Doktor Mengabdi Team efforts to empower and assist the community by two steps, namely: observation and focus group discussion by participatory action approach. The results show two things. Firstly, to realize an educational destination, the village youth (Karang Taruna) can make tolerance tourism packages to promote tolerance villages both conventionally and digitally. The realization is that the Doktor Mengabdi team collaborates with academics and practitioners to train them regularly and equip them with knowledge of tolerance, homestay management and tourism amenities, planning tourism promotions and tour packages, so that can benefit local residents. Secondly, the PKK members will be trained to make batik by collaboration with Celaket Written Batik (BTC) and Soendari batik gallery. This program can becomes a socio-cultural laboratory in tolerance learning from local wisdom with a more specific theme, namely the Development of Economic and Educational Tourism Areas.

Keywords
Local wisdom, Tourism, Education, Tolerance, and Sukodadi

Topic
Sosical Economic and Community Development

Link: https://ifory.id/abstract/nN4VxPHceCp9

Corresponding Author
Iryanti Fatyasari Nata

Institutions
Lambung Mangkurat University

Abstract
Edible film is a thin layer that can consume and as a protective food from environment affect such as water vapor, oxygen, and moisture. The edible film which has antioxidant could be preventing from bacterial activity. The source of antioxidant is from “Kelakai” extract. This aims of this study are to evaluate the effect of eggshell powder concentration and cassava starch as raw material for edible film production and study the physical and chemical properties of edible film produced. The edible film was made from a mixture of chicken eggshell powder (5%, 10%, 15%, 20%, 30%, wt/v) and cassava starch (5% wt/v) in distilled water then added 1.5% v/v of glycerol and 5% v/v of Kelakai extract. The mixture was heated up to ± 96 ºC, 100 rpm for 40 min. Then, mixture was poured into the mold (20 cm x 10 cm) and dried in an oven at 50 ºC for 24 h. The best composition of edible film produced with 10% of eggshell powder which has thickness of 0.174 mm, 1.5 MPa of tensile strength, 27% of elongation at elongation at break. The surface morphology of edible film was shown the rough surface and transparent which contains of CH, OH, and C = O groups that identified by Fourier Transform Infra-Red (FT-IR) analysis. The antioxidant activity of edible film was shown by scavenging activity about 5.12% after 10 min.

Keywords
edible film; eggshell powder; cassava starch; kelakai

Topic
Engineering

Link: https://ifory.id/abstract/MRwhfbrLQ3AH

Corresponding Author
Angky Wahyu Putranto

Institutions
Bioprocess Engineering, Faculty of Agricultural Technology, Universitas Brawijaya, Malang, Indonesia

Email : Y_Wibisono[at]ub.ac.id

Abstract
The education and health sectors are placed in the top position of Indonesian goverment priority scales, since both have positive relationship and should be developed together. Education and health sector collaboration actually creates a health awareness for children as early as possible, which starts at the age of primary school. Unfortunately, the drinking water treatment equipment that can be operated continuously with low cost or energy for elementary students are never found in Malang, Indonesia. So this study aim is to install the drinking water treatment device based on membrane filtration and UV sterilization at primary school and also to analyze of teachers and students satisfaction toward the equipment applied. In this study, the importance performance analysis (IPA) and consumer satisfaction index (CSI) are used as a method for analyzing of teachers and students satisfaction. The data was collected from 100 respondents and 13 attributes were analyzed in this research. The IPA results showed that attribute categorized into quadrant I or priority for improvement only maintenance of the equipment. Attributes that are categorized into quadrant II that need to be maintained are appearance, freshness, taste, volume precision and quality testing in laboratory. While attributes that are categorized into quadrant III or second priority for improvement are flavor, color, volume, hygiene of water and affordability. The attributes that are categorized into quadrant IV are practicality of use and the ergonomic design. The consumer satisfaction level by using CSI is 76% which means that consumers are satisfied with water produced by drinking water treatment device installed in their school

Keywords
drinking water treatment, membrane filtration, UV technology, importance performance analysis, consumer satisfaction index

Topic
Education

Link: https://ifory.id/abstract/uHkq4PKRTUwW

Corresponding Author
Lilik Purwanti

Institutions
Universitas Brawijaya

Abstract
BUM Desa are business entities whose almost all of the capital is owned by the Village through investment, which has a strategic role to accommodate activities in the economic and public services sector. BUM Desa Sejahtera Gunungsari has been formed since 2018, when the Mayor of Batu launched the Movement to build a Tourism Village by encouraging the village to activate BUM Desa to manage tourist destinations. Gunungsari Village has the tourism potential of Picking Roses, land of lanterns and cultural arts. The problem is that the BUM Desa management is not ready to organize the organizations management, business management strategies, tourism promotion, marketing and accountability system. The method used by the Participatory Research Analysis (PRA) and Strategic Management approach with 4 stages: the environment observation, strategies formulation, strategies implemention, and evaluation or controll. Solutions these problems are emphasized on environment observation and strategy formulation. Therefore it is necessary to develop an appropriate BUM Desa management model for Tourism Villages which consists of a management system, financial management, and governance of promotion and marketing cooperation (online). The application of financial management uses the BUM Desa Accounting Application System which must be supported by increasing the knowledge and skills of BUM Desa administrators through training in the use of the system.

Keywords
BUMDes; Tourism Village; Management Governance; Financial Governance

Topic
Management and Business

Link: https://ifory.id/abstract/ELvBDthqbW9F

Corresponding Author
Aulisani Annisa

Institutions
Universitas Hasanuddin, Makassar, Indonesia

Abstract
The Livestock and Animal Health Service Office of South Sulawesi Province stated that in 2017 beef cattle in Gowa Regency registered in insurance reached 1,367, while in 2018 decreased significantly to 1,140. The decrease in number of insured cattle indicates a decrease in the number of farmers participating in the insurance program. This study aims to determine the Satisfaction Index of cattle farmers on the services quality of Cattle Insurance Program in Manuju District, Gowa Regency. This study was conducted from May to July 2019 with a type of descriptive quantitative research. The sample used was 50 participants who are/were insurance participants. The data collected through literature study, interviews and questionnaires. The data analysed with two methods of Customer Satisfaction Index (CSI) and Importance Performance Analysis (IPA). The results indicate that the Customer Satisfaction Index (CSI) of farmers is 68.49% which included in the category of Good. The top priority attributes in service quality of Cattle Insurance Program, namely Punctuality of claims payment, Management of administration and Clarity of CIP information.

Keywords
Satisfaction Index, Service Quality, Insurance, Beef Cattle

Topic
Socio-economic of animal science

Link: https://ifory.id/abstract/wrFbdv73BXhE

Corresponding Author
Sutomo , M.Si., Apt.

Institutions
a) Program Studi Farmasi Fakultas MIPA Universitas Lambung Mangkurat, Banjarbaru, Kalimantan Selatan
* sutomo01[at]ulm.ac.id

Abstract
Mundar (Garcinia forbesii King.) merupakan salah satu tumbuhan asal Kalimantan Selatan. Tumbuhan ini memiliki kandungan kimia yang memiliki potensi sebagai obat. Tujuan penelitian ini adalah untuk memberikan gambaran farmakognostik secara spesifik, nonspesifik, dan menentukan akivitas antioksidan daun G. forbesii. Parameter spesifik meliputi uji organoleptik, mikroskopik, profil kromatografi lapis tipis, dan skrining fitokimia. Parameter nonspesifik meliputi kadar abu total, kadar abu tidak larut asam, susut pengeringan, kadar sari larut air, dan kadar sari larut etanol. Aktivitas antioksidan ditentukan dengan metode DPPH berdasarkan nilai IC50. Hasil uji parameter spesifik yaitu serbuk hijau, berbau khas, dan rasa asam. Uji mikroskopik menunjukkan stomata, epidermis atas, epidermis bawah, dinding sel, xilem, floem, jaringan palisade, jaringan spons, dan kutikula. Daun G. forbesii mengandung alkaloid, flavonoid, fenol, tanin, dan steroid. Profil KLT menunjukkan pemisahan yang baik pada eluen polar dan terdapat bercak kuning muncul setelah disemprot dengan reagen DPPH. Uji parameter nonspesifik yaitu kadar abu total 6,52%±0,10; kadar abu tidak larut asam 1,06%± 0,08; susut pengeringan 6,43%±0,38; kadar sari larut air 34,30%±0,30; kadar sari larut etanol 23,47%±0,35. Ekstrak etanol daun G. forbesii memiliki nilai IC50 65,74 ppm. Pengujian farmakognostik memenuhi persyaratan dan ekstrak daun G. forbesii memiliki aktivitas antioksidan yang kuat.

Keywords
Garcinia forbesii King., mundar, ekstrak, farmakognostik, antioksidan

Topic
Farmakognosi dan Fitokimia

Link: https://ifory.id/abstract/kgAxU7V4ED2M

Corresponding Author
Fourier Dzar Eljabbar Latief

Institutions
a) Laboratory of Physics of Porous Medium and Fluid Dynamics, Physics of Earth and Complex Systems, Faculty of Mathematics and Natural Sciences, Institu Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia
*fourier[at]fi.itb.ac.id

Abstract
Sedimentary rock is commonly well recognized as one of hydrocarbon reservoir rock. Meanwhile, igneous rock is typically found in geothermal reservoirs. Both rock types have different formation mechanism, which leds to different structural properties. Pore space in the sedimentary rock is formed in between the sedimented grains after undergone a diagenesis (sedimentation, compaction, cementation). Igneous rock however, has pore space mainly in the form of fractures and cracks as a result of high overburden pressure which leds to the various scale of deformation in the rock. In this study, both type of rock were represented by computer models. Pore structure characteristics of both rock type were analyzed with varying porosity. The pore space of the igneous rock is modeled by varying the aperture of the crack, which was originated from a real igneous rock (model C). The sedimentary rock is modeled using the random penetrable sphere model (model G). Pore structure characterization by means of digital image analysis shows that pore structure separation (equals to crack aperture in model C, and pore diameter in model G), specific surface area (surface density), and fractal dimension has clear and distinct pattern with respect to change in porosity. Absolute permeability was then calculated by means of simulating fluid flow through the models using Lattice Boltzmann Method which implemented in Palabos (parallel lattice Boltzmann solver). The absolute permeability of model C shows greater effect due to change of porosity compared to model G. Three dimensional qualitative analysis was also conducted from the simulation results, which portrays the pattern of fluid flowpath through the pore space.

Keywords
igneous rock, sedimentary rock, crack, aperture, porosity, absolute permeability

Topic
Computational and characterization of materials

Link: https://ifory.id/abstract/UTpQD6k3VnqG

Corresponding Author
Maya Dewi Dyah Maharani

Institutions
Universitas Sahid

Abstract
The Indonesian chicken industry is a key sector for the national economy, supplying 65% of all animal protein and employing 10% of the national labor. With the increasing business competition, it is necessary to increase the capability in managing the waste retention time generated. This study focuses on increasing the capability of the chicken slaughterhouse to manage the retention time of waste. The method used is the Multi-Dimensional Scaling (MDS) analysis to calculate The Capability of Container and Chicken Slaughtered Business in Managing Waste Retention Time. This prospective analysis is carried out to analyse the degree of strength and dependency relationships by giving a score of the level of direct or indirect influence between elements of leverage that have been generated from MDS analysis. Prospective analysis results in the form of key factors that form the basis of change scenario that can be achieved. The results can be concluded that the determinants factor of the Improving the Capability of Container and Slaughtered Chicken Business in managing sustainable waste retention time are: (i) Methods and ways of utilizing technology Wastewater Treatment Plant, (ii) Local Government Arrangements, (iii) Waste quantity and quality, and (iv) Financial Management.

Keywords
Chicken-slaughterhouse, Waste; Retention-time, MDS, Prospective

Topic
Good Health and Well Being

Link: https://ifory.id/abstract/UNWj98VTrqPy

Corresponding Author
Elly Yuliawati

Institutions
Faculty of Communication Sciences, Mercu Buana University, Jakarta, Indonesia

Abstract
ABSTRACT The development of social media such as Facebook, Instagram, Twitter is no longer a stranger to the ears of Indonesian people, especially in Jakarta, including citizens who live in the Kalibaru area, Cilincing, North Jakarta. Even though the area is considered to be a slum and underdeveloped area, the fact is that almost all residents there have known and tried to follow the development of communication technology and social media. However, education especially for teenagers about using good and wise social media still needs to be improved. This Community Service Program aims to equip young people in the Kalibaru area, Cilincing, North Jakarta how to use good social media to improve their self-image and the image of the region through social media Instagram. Changing peoples views about the slums of the Kalibaru area into a beautiful area as a tourist attraction. The training method (workshop) applies an interactive discussion technique that involves all participants to actively participate in the activity. The training results illustrate that teenagers in the Kalibaru area understand about the meaning of self-image and the image of the region and also understand about the hope for self-image and the image of the Kalibaru area going forward. They gained new knowledge about the use of Instagram, the importance of caption, hash tag, the use of good and interesting grammar and mastery of photography techniques to build memorable information so that they can develop their self-image and the Kalibaru area as one of the tourist destinations in North Jakarta.

Keywords
Self-Image, Regional Image, Travel Destinations, Social Media, Instagram

Topic
Literacy Media, Arts and Culture

Link: https://ifory.id/abstract/fbjuD3ZBgcYt

Corresponding Author
Aty Herawati

Institutions
Universitas Mercu Buana

Abstract
This community service is done to encourage the community to be creative and independent with entrepreneurs. Activities can be carried out by partnering, building partnerships will make it easier and more excited. The people of Meruya Selatan village have partnered with the PKK and Menara Child-Friendly Integrated Public Space (RPTRA), also to help one of the DKI Jakarta government programs. The community of South Meruya Village has been carrying out production activities, if there is a desire or order, for this reason, it is necessary to increase the scale of production and marketing, beginning with improvements in the production process and product quality, it is hoped that they will understand and have an awareness of the importance of product quality. After training and assistance in the production of bags made of coffee, decorative flowers and souvenirs for SME people in Meruya Selatan village together with PKK women, they became more aware of the need to set quality standards for products made, product quality expectations of buyers / consumers to have a sustainable business business. Furthermore, it becomes important to produce sustainable products by building commitment, and producing products that meet market needs and are different from the others.

Keywords
SME Products, Product quality standards, and product quality measurements

Topic
Sustainable Development

Link: https://ifory.id/abstract/HpVLwWcQ6YuA

Corresponding Author
Rummi Santi Rama Sirait

Institutions
Universitas Budi Luhur

Abstract
The use of electrical equipment that is not in accordance with the standards established by SNI (Standar Nasional Indonesia) and the installation of electrical equipment that is not in accordance with the provisions are still often found in peoples homes, so that the threat of electric fire hazards will be possible. Data from the recapitulation of fire incidents in DKI Jakarta Province in 2018 revealed that the biggest cause of fire was due to electrical short circuit, as many as 494 fire incidents occurred in a total of 1667 residences. This is quite alarming because many of the fires are caused by the low quality and installation of cables in most peoples homes and residents do not understand the dangers of using inappropriate electrical energy. To participate in assisting the government in conducting socialization about the right electricity usage to prevent fires, the PPM activities in the form of socialization and direct assistance to residents homes. The purpose of this activity is so that in the future residents of the Tugu Selatan Village of North Jakarta are more concerned about the electrical installations and the electrical equipment they use by following with specified standards. This activity is very useful for the residents, proven by their enthusiasm in participating in the extension program with questions about the correct use of electrical energy and peoples curiosity in knowing how to save electricity usage at home and calculate the cost of using electricity in their homes.

Keywords
short circuit, electricity, SNI, electrical hazard

Topic
Quality Education, Clean Energy

Link: https://ifory.id/abstract/cufH6bJjxmtk

Corresponding Author
Inggit Musdinar Sayekti Sihing Yang Mawantu

Institutions
Dosen Teknik Arsitektur Fakultas Teknik Universitas Budi Luhur
Universitas Budi Luhur , Jakarta, 12260
Telp (021) 5853753 Ext 253, Fax (021)

Abstract
Abstract : The existence of open spaces in private urban villages in Jakarta is very rare. Occupancy at the center of the city causes people choose land for buildings rather than open space. Even though Jakarta has ranked in the top 5 countries with an upper threshold. Vertical garden was chosen as an alternative greening solution on limited open space. Vertical garden assistance and training is aimed at students from PGRI 15 High School located around the campus of Budi Luhur University, South Jakarta. Students are introduced to the importance of greening for environmental health and are encouraged to be creative in creating vertical garden forms with a variety of ideas. The approach method used is tri-daya, i.e. i) social power, ii) environmental power, and iii) economic power. The concept of Social Power is to invite students to become individuals who are more concerned about the environment capable of providing solutions to the completion of greening in urban areas that are increasingly limited. The concept of Environmental Power aims to invite students to take part in a residential or school environment to implement a vertical garden and increase their creativity in developing various vertical garden designs. And the concept of Economic Power is the result of the production of making vertical gardens can be used for themselves or sold to the general public, which in turn can increase the economic value of the surrounding community.

Keywords
open space, vertical garden, highschool students

Topic
Sustainable Development

Link: https://ifory.id/abstract/cP4bhvJGzpUC

Corresponding Author
Yayan Sanjaya

Institutions
UPI

Abstract
Capablity of Hermetia illucens to consume some weeds were conducted. This is an alternative way to reduce weeds in vegetable fields. A descriptive research was conducted by investigating role of BSF on some weeds, ki rinyuh (Chromolaena odorata), Babadotan (Ageratum conyzoides), rumput gajah (Pennisetum purpreum). Each was given BSF larvae with 150 g, 200 gr and 250 gr of weight on 500 gr weed, The result showed that BSF larvae at 50 mg of weight convert weed between 80- 100%, on 100 mg convert 75 % – 97 %, on 150 mg can convert 80 % -100 %. The mortality of BSF larvae on Chromolaena odorata was 90 %, Ageratum conyzoides was 75 %, Pennisetum purpreum was 40%. This showed BSF larvae can be convert weed into BSFlarvae biomass.

Keywords
Hermetia illucens, weeds, weight, bioconvesion

Topic
Biology

Link: https://ifory.id/abstract/yWLZ3dPuRMYw

Corresponding Author
Tri Nopriana

Institutions
Universitas Swadaya Gunung Djati

Abstract
Good candidates for mathematics teachers are those who have good thinking skills especially in mathematics, good habits of mind and the ability to survive under pressure. Those skills are reflected in the level of geometric thinking, the level of logical thinking, the scale of habits of mind and resilience in mathematics. The purposes of this study were to analyze the achievement of the level of geometric thinking, the level of logical thinking of pre-service mathematics teachers, describe the habits of mind and student resilience in mathematics. The research subjects consisted of 30 mathematics education students at FKIP Swadaya Gunung Djati University (UGJ) as pre-service mathematics teachers who would practice by teaching in schools. The instruments in this study were: (1) van Hieles geometrical thinking test developed by The Cognitive Development and Achievement in the Secondary School Geometry Project (CDASSG), (2) the logical thinking test (TOLT) designed by Tobin and Capie, (3) The Habits of Minds Scale, and (4) Mathematical Resilience Scale with 4 categories of Likert models. The results of the study were that pre-service mathematics teachers achieved: (1) the level of van Hieles geometrical thinking at the stage of informal deduction, (2) the level of logical thinking at the formal thinking stage, meaning pre-service mathematics teachers were able to solve problems related to proportional reasoning, variable reasoning, correlational reasoning, and combinatorial reasoning. Furthermore, on the soft skills, pre-service mathematics teachers have (3) habits of mind in the good category with an average achievement of 74.5%, this is also seen in achievement (4) the resilience in mathematics who have a good category with an average achievement of 73.6%. Based on the results of the study, it can be concluded that overall the pre-service mathematics teachers in FKIP UGJ have good abilities in geometrical and logical thinking, the habits of mind and resilience in facing mathematical problems.

Keywords
Van Hieles Geometry Thinking, Logical Thinking, Habits of Mind, Resilience in Mathematics

Topic
Mathematics Education

Link: https://ifory.id/abstract/7XjMLedZaAm6

Corresponding Author
Amalia Suci Lestari

Institutions
magister program of physics education, universitas pendidikan indonesia, Bandung 40154, Indonesia

Abstract
The aim of this research was to investigate the scientific literacy ability of the eleventh year students in the topic of heat and temperature by using Rasch model analysis. This was a case study research by applying post-test only group research design. The samples of the research were of 31 students consisting of 11 male students and 20 female students. Multiple choice test consisting of 25 items were used in this research. The test items were adapted from the PISA framework constructed (r= 0.82). The result of analysis by using Rasch model in form of Wright map display where the students 10P had high ability rate and students 04L, 07P, and 16L with the response pattern considered unfit. The MNSQ outfit value accepted was out of the limit. Generally, percentage of students- scientific literacy ability in the three competencies were categorized low.

Keywords
Rasch model, Scientific literacy, heat and temperature

Topic
Physics Education

Link: https://ifory.id/abstract/YeAH3pnvwJ9y

Corresponding Author
Sumanang Muhtar Gozali

Institutions
UPI

Abstract
In this paper we review the main properties of cyclically ordered groups . Moreover, for two cyclically ordered groups A and B, we construct a cyclic order on the direct product A×B.

Keywords
cyclic order, cylic ordered group, direct product

Topic
Mathematics

Link: https://ifory.id/abstract/7GkyBW8zbVq3

Corresponding Author
Winda Ramadianti

Institutions
Universitas Pendidikan Indonesia

Abstract
Fractions is one of the basic topics in mathematics. Knowledge about fraction relates conceptual knowledge and procedural knowledge. Therefore, the instructions about fractions have to consider them. To investigate ways of conceptual knowledge and procedural knowledge at mathematics instruction in junior high school, we observed mathematics instruction in two different classes which were taught by different teachers. This research was conducted at a junior high school in Bengkulu, Indonesia. The results showed that procedural knowledge was discussed more than conceptual knowledge. In addition, the study also found that almost procedural knowledge has not yet been connected with conceptual knowledge.

Keywords
fraction, procedural knowledge, conceptual knowledge

Topic
Mathematics Education

Link: https://ifory.id/abstract/4gkfdLDMzHEQ

Corresponding Author
Siti Rohmah Rohimah

Institutions
UNJ

Abstract
The AIDS Commission (KPA) recorded the highest number of sufferers of Human Immunodeficiency Virus (HIV) and Acquired Immune Deficiency Syndrome (AIDS) in East Jakarta in DKI Jakarta. This study aims to determine the factors that influence spatially and non-spatially on the number of people with HIV / AIDS in East Jakarta. The results of this study are expected to be useful in eradicating HIV / AIDS, especially in East Jakarta and generally for other regions that have the same characteristics as East Jakarta. The parameter estimation method in this study used the maximum likelihood method. The results showed that spatial and non-spatial factors had a significant effect with alpha 5%. In addition, the addition of spatial factors gave smaller standard error value. Therefore, it can be concluded that the Poisson autoregressive spatial model provided better parameter estimation results than the Poisson regression model.

Keywords
HIV / AIDS, Spatial Autoregressive Poisson, Poisson Regression, Maximum Likelihood

Topic
Mathematics

Link: https://ifory.id/abstract/PdzBT7jw6WnG

Corresponding Author
Sowanto Sowanto

Institutions
a) Department of Mathematics Education, STKIP Bima, Jl. Piere Tendean, Bima, Indonesia
(b) Department of Mathematics Education, Fakultas Ilmu Tarbiyah & Keguruan (FITK) UIN Syarif hidayatullah, Jakarta
*sowantos[at]gmail.com

Abstract
This research is based on the absence of teaching materials on statistical methods oriented to the Indonesian National Qualification Framework (INQF) in the era of the industrial revolution 4.0 which can facilitate students majoring in mathematics education at STKIP Bima with a hybrid learning model that combines face-to-face learning in the classroom and e-learning. The purpose of this study is to produce products in the form of teaching materials that design at online class that is adjusted to hybrid learning oriented to INQF. The method used is design research which includes: (1) preliminary design, in this phase is made Hypothetical Learning Trajectory (HLT); (2) experiments, in this phase existing designs are tested to students; (3) retrospective analysis, in this phase the researchers compare the HLT with the actual student learning process. The results of this research showed that tasks which were presented in teaching materials that combine face-to-face learning in the classroom and e-learning in the form of online classes by considering learning obstacle and preliminary study able to facilitate students to understand the preliminary statistics material, data presentation, and measure of central tendency.

Keywords
Hybrid Learning, Development of Teaching Materials, Indonesian National Qualification Framework

Topic
Mathematics Education

Link: https://ifory.id/abstract/cqvmybU4X6MB

Corresponding Author
Neni Prihartini

Institutions
-

Abstract
Probability is one of the subjects in learning mathematics in the ninth grade. Based on the results of preliminary tests conducted, students still get difficulties in restating a concept of probability, students still mistaken in giving examples and not examples of probability events, and the relationship between theoretical and empirical probability, and also students still have difficulty in exploring empirical probability. That is because learning done in school is less meaningful for students. Therefore, this study aims to develop learning probability through the Realistic Mathematics Education (RME) approach. This research using design research method which consists of three cyclic phases, such as though experiment, instruction experiment, and retrospective analysis. Data in this study was obtained from student worksheets, interview sheets, field notes sheets, Hypothesis Learning Trajectory (HLT), voice recordings, and pictures. Based on the results of a retrospective analysis, learning with the RME approach can develop students ability in understanding probability concept. Students can understand theoretical and empirical probability, comparing the chance of events, and understanding the frequency of expectations in empirical events. RME principles can support students- thinking through the use of contexts, the use of the models, the use of student construction results, interactivity, and the intertwining of various learning strands.

Keywords
Understanding, Probability, RME

Topic
Mathematics Education

Link: https://ifory.id/abstract/rMBPCy4Fg6wT

Corresponding Author
Findi Septiani

Institutions
UPI

Abstract
Teaching materials by integrating local culture makes easier for students to understand the subject matter in the learning process. The aims of the study is to measure the effectiveness of teaching materials based on local wisdom of agriculture in Binjai in improving the students problem solving abilities. The research method was a quasi experimental which use non equivalent control group in the pretest posttest design. The sample of study were students of Senior High School grade X in Binjai that consisted of experiment group which used teaching materials based on local wisdom of agriculture in Binjai and control group that used student handbooks. Teaching materials are tested by material experts and technology experts to ensure the quality of teaching materials. Data collection was conducted through test. The results showed that the teaching materials based on local wisdom of agriculture in Binjai effective in improving students problem solving abilities in the experimental group students based on the results of N gain value was 0.67 which has medium criteria. It means teaching materials based on agricultural local wisdom of agriculture in Binjai can be used as one of the teaching materials in learning activities.

Keywords
Local wisdom, teaching materials, effectiveness, problem solving abilities.

Topic
Biology Education

Link: https://ifory.id/abstract/mXwVRr7ytM4W

Corresponding Author
Kadek Sera Harlistya Udayani

Institutions
UPI

Abstract
Teaching materials based on wisdom and local potential are needed in environmental education in order to produce learning resources that are appropriate to students cultural, geographical and social environment. The purpose of this study was to obtain a picture of the impact or effect of the use of teaching materials based on local wisdom of Tumpek Wariga on achieving students problem solving abilities. The method used in this study is a quasi experiment with a research design that is non equivalent pretest-posttest design. The study was conducted at one of the high schools in Denpasar. The research sample consisted of 36 experimental class students who used teaching materials based on local wisdom Tumpek Wariga and 36 control class students who used national teaching materials. Teaching material based on local wisdom Tumpek Wariga has previously been validated by reviewers with results worth to using. Data about students problem solving abilities are measured by essay questions arranged according to indicators of problem solving. The research data did not meet the prerequisite test then analyzed through the nonparametric ¬Mann-whitney test. The analysis showed that there were significant differences in posttest results between the control and experimental classes with a significance level of 0.00. This shows that teaching materials based on local wisdom Tumpek Wariga can improve students problem solving abilities.

Keywords
Teaching material, local wisdom, problem solving ability

Topic
Biology Education

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

Corresponding Author
Arif Sunaryo

Institutions
IKIP Siliwangi

Abstract
There are still many students who have difficulty in learning mathematics about the matter of changing ordinary fractions into mixed fraction forms because students do not understand the provisions that are the basis of how ordinary fractions can be transformed into mixed fractions. That is still not able to distinguish the definitions of the numerator and the denominator in fractions, besides that students have not been able to interpret the form of fractions correctly in terms of the fundamental ability of understanding the mathematical thinking process. The benefit of VBA for Excel elementary school is to associate mathematical concepts from fractional material that can help students understand the thinking process in visual form. The development of technology now makes the media more efficient and faster, therefore with the help of technology, a teacher or teacher can make a lot of media that is tailored to the needs of teaching in the classroom. The method used in media development uses ADDIE (Analysis of Design Development Implementation and Evaluation). And the feasibility of instructional media from the assessment of media experts and material experts. Before carrying out implementation in class, the media and material are assessed by users or elementary school mathematics teacher to get a questionnaire assessment and enter the evaluation as a media improvement that will be implemented to students.

Keywords
Understanding Ability, VBA for Excel, ordinary fractions, mixture fractions

Topic
Mathematics Education

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

Corresponding Author
Nur Fadhillah

Institutions
Universitas Pendidikan Indonesia

Abstract
This research aimed to develop a multi representation physic ebook, which oriented on analytic and interactive problem-solving skills in high school students. The research method used is Research and Development (R&D). While the multi representation teaching material writing model was used on the development of the ebook content, the ebook application itself was build using the App Builder on BuildFire website. The research was conducted in one of Tangerang public schools and attended by 60 students. Several data collection method was used as follow: 1) Expert judgment on ebook validation process, 2) Comprehensibility test using discourse main idea check, 3) Analytic problem-solving skill test using essay question sets, 4) hypothesis testing and effect size measurement, 5) observation on student perceptions through student responses on ebook implementation questionnaire. Expert judgement shows that the ebook has very good quality criteria. The comprehensibility test show that the readability of the discourse is on the medium and high criteria. Based on the N-gain calculation, the analytical problem-solving skill improvement is on medium criteria. It is known through the hypothesis test that there are gaps on problem-solving skills between student whose study using the ebook and the ones using the Electronic School Books. The effect size measurement shows large effect criteria on the effectiveness of the ebook. Students responses on the ebook shows that almost every student agreed to positive statement on the ebook and disagreed to negative statement on the ebook.

Keywords
Senior high school ebook, Multi representation, Analytical Problem Solving skill

Topic
Physics Education

Link: https://ifory.id/abstract/mJwutb6nWVAC

Corresponding Author
Taufik Ridwan

Institutions
Study Program of System and Information Technology Universitas Pendidikan Indonesia,
Study Program of Elementary School Teacher Training Universitas Pendidikan Indonesia

Abstract
Development and growth in children have to be stimulated properly in order to occur optimally. One aspect that must be considered is the cognitive aspect. In the growth and development phase, children spend most of their time to play. Generally, Children have the high ability to learn and curiosity. They tend to like games that attract attention to be played. At his age, children can-t be separated from objects in their environment, including objects in geometric shapes such as balls, cupboards, beams, tubes, coins, cubes, tubes, cabinets, and many more in play. Learning to recognize geometric shapes helps children to understand, describe, and describe objects that are around them. Therefore, at this time children need to get interesting positive stimulus to hone their intelligence. Now, many childrem can-t be separated form gadgets. Many of them become addicted to gadget and games. This paper tries to analyze and design a prototype of Digital Edu Games for children that can be used to help learn geometry based on specific problem solving approaches. Children will learn geometry through pairing and adjusting pictures accordingly, arranging drawings, and building a geometric shape. The method used in this study is Research and Development (R&D) with a waterfall approach in software development. The objectives of this study are: (1) analyzing the needs of games for learning geometry for children; (2) designing N-Ram for children. This research has benefits in developing learning media through Digital Edu Games combined with games in the form of games on gadgets.

Keywords
digital games, learning media, geometry, children

Topic
Computer Science

Link: https://ifory.id/abstract/ajNAMc9zUk6n

Corresponding Author
Ilham Hidayat Kurniawan

Institutions
Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Indonesia

Observatorium Bosscha, Institut Teknologi Bandung, Indonesia

Abstract
A GOTO telescope motion control system in right ascension and declination direction with three modes of speed using microcontroller ATMega2560 has been made.. This research was pursed in a telescope motion control system that leads to right ascension and declination. The telescope used is one of the telescopes at Bosscha Observatory, the GOTO telescope. The current condition of the GOTO telescope has decreased. This is caused by the motion control system that was applied previously doesn-t work optimally. Therefore this research will discuss and create a new system for telescopes which will use the ATMega2560 microcontroller which is embedded in the Arduino Mega board as the brain of this system. The way this system works is first the ATmega2560 microcontroller will read the first position of the telescope after that the telescope will be moved by the handbox towards right ascension or declination and then the last position of the telescope will be read by the microcontroller. By using this latest system the servo motor in the GOTO telescope can move with three speed modes namely guide, set and slew where the speed of the guide requires a frequency of 1604 Hz, the speed of the set requires a frequency of 51.340 Hz and the slew speed requires a frequency of 501,368 KHz.

Keywords
GOTO telescope, ATMega2560, control system, declination, right ascension

Topic
Physics

Link: https://ifory.id/abstract/xVzy9D4rW7C2

Corresponding Author
Inne Marthyane Pratiwi

Institutions
Universitas Islam Negeri Sunan Gunung Djati Bandung

Abstract
Mathematical communication skill are very important for the students of Madrasah Ibtidaiyah. Students who have good mathematical communication skill are able to express and accept mathematical ideas carefully, analytically, critically and evaluatively so they will understand mathematical concepts. This study aims to identify the learning obstacles faced by students in mathematical communication skill in the volume of cubes and beams subject. This research was part of the Didactical Design Research (DDR) conducted at one of the Madrasah Ibtidaiyah in Bandung Regency. Research participants were 13 of sixth grade students. Data collection is done by test, interview, and observation. Based on the research, we found difficulties faced by students in mathematical communication skill on volume of cubes and beams subject which are categorized into ontological, didactical, and epistemological obstacle. For this reason, further research is needed in the form of learning design to overcome the learning obstacle.

Keywords
earning obstacle, madrasah ibtidaiyah, mathematical communication skill, volume of cubes and beam

Topic
Mathematics Education

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

Corresponding Author
Salman Alfarisi

Institutions
UPI

Abstract
The paper explained about the profile of students creative thinking skill in designing optical tool prototype. The research method used mixed method with explanatory sequential design model. The research design was experimental design. Subject of this study consist of 22 students on the 11th grade at one of Senior high school in Jambi. Students were assigned to design prototype which is the problem solution of optical tools practice. The instrument of assessment design used in this research was assessment of design process that consist of 5 assessment aspects that implicated STEM field (Science, Technology, Engineering, and Mathematics). The result of this study showed by using STEM approach method, students can think creatively in the process of design with percentage rate around 66,25%.

Keywords
Creativity, STEM Approach, Design Process

Topic
Integrated Science Education

Link: https://ifory.id/abstract/Xu9Dv3Hy2Qjg

Corresponding Author
Anna Rachmadyana Harry

Institutions
Universitas Pendidikan Indonesia

Abstract
The purpose of the research carried out is to describe the classification of the level of mathematical abstraction ability in the material sequence and series in terms of the cognitive style of the students, examine the relationship between mathematical level abstractions and students cognitive styles, and find out the errors experienced by students in completing questions about mathematical abstraction ability in the sequence and series material in terms of cognitive style. This research is a descriptive study using a qualitative approach. The subject of this study was obtained by carrying out cognitive style tests using instruments MFFT (Matching Familiar Figures Test) developed by Warli (2010) and the test questions of mathematical abstraction abilities are arranged based on levels and indicators of mathematical abstraction developed by Fitriani (2018) which was attended by 31 grade XI students from one of the high schools in Bandung city. The MFFT cognitive style test results group students into 4 cognitive style groups, namely impulsive (I), reflective (R), impulsive and reflective (IR), and not impulsive and not reflective (TITR). Mathematical abstraction abilities are divided into 4 levels, level 1 perceptual abstraction, level 2 internalization, level 3 interiorization, and level 4 second level of interiorization. The results of the students mathematical abstraction ability test show that student I is at level 1 transition, level 2 complete, level 3 transitions, and level 4 transitions, and complete level in question 5. Student R is at complete level for level 1 questions, transition level for level 2 questions, complete level for level 3 and transition level for level 4, and complete level for question 5. Students IR are at the complete level for all levels 1 to level 4 and questions number 5. TITR students are at level 1 complete, level 2 transitions, complete level 3, level 4 transitions, and do not get the achievement of question 5. Linkages were found between the level of mathematical abstraction and the cognitive style of IR. Several types of errors are found when students solve mathematical abstraction questions including the category of error CE (Comprehension Error), TE (Transformation Error), PSE (Process Skill Error), and EE (Econding Error).

Keywords
mathematical abstraction, sequences and series, cognitive style, student mistakes, Newmans theory

Topic
Mathematics Education

Link: https://ifory.id/abstract/C4XxemzhtTuK