Indonesia Conference Directory

Corresponding Author
Dindin Nasrudin

Institutions
UIN Sunan Gunung Djati Bandung

Abstract
Many students dont like physics because they feel far away from physics. Therefore physics must be made closer to students through contextual physics. This paper wants to describe the physical concepts that exist in geothermal power plants. The method used is descriptive. The results of the study show that there are many physics concepts that can be taught to students through observation and analysis of geothermal power plants such as the concepts of temperature, heat and displacement, electricity, energy and others. These physics concepts can be packaged in physics learning through the development of enrichment materials. It is hoped that there will be an increase in the mastery of concepts and literacy of students towards the surrounding natural resources.

Keywords
electricity, geothermal, literacy

Topic
Physics

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

Corresponding Author
Dhini Annisa Rahmasari Kanto

Institutions
a) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Garut University
Jalan Jati No. 42B, Garut 44151, Indonesia
*dhini.annisakanto[at]gmail.com
b) Department of Pharmacy, Faculty of Mathematics and Natural Sciences, Garut University
Jalan Jati No. 42B, Garut 44151, Indonesia

Abstract
Syzygium is a genus belongs to Myrtaceae. One species of the genus is cashew rose (Syzygium jambos (L.) Alston) which contains secondary metabolites, such as flavonoids, tannins, steroids/terpenoids, alkaloids and saponins. This study aimed to find the content of these secondary metabolites using thin layer chromatography (TLC) and its antioxidant activity. The simplicia of cashew rose leaves was extracted by maceration using methanol as a solvent for 64 hours. This results in methanolic extract of cashew rose leaves. The resulted chromatogram using n-hexane and ethyl acetate eluent showed that the methanolic extract of leaves cashew rose has at least five compounds with retention value (Rf) consecutively were 0.32, 0.36, 0.68, 0.72, and 0.84. The stains could be seen in UV light 356 nm, but not in UV light 254 nm. It can be concluded that these compounds were classified as nonfenolic compound. The antioxidant test of methanolic extract of cashew rose leaves showed a very strong antioxidant activity with IC50 value of 13,554 ug/mL.

Keywords
Syzygium jambos (L.) Alston; chromatogram; DPPH; antioxidant; IC50

Topic
Chemistry

Link: https://ifory.id/abstract/9YDbrgKQZhJF

Corresponding Author
Elsa Lisanti

Institutions
1 Universitas Negeri Jakarta (UNJ) Department of Biology, Faculty of Mathematics and Natural Sciences, Kampus A, Gedung Hasjim Asjarie Lt. 9. Jl. Rawamangun Muka Jakarta Timur, 13220, Indonesia

2 Center Application Isotopes and Radiation (CAIR), National Nuclear Energy Agency of Indonesia,
Jl. Raya Lebak Bulus No. 49, Jakarta Selatan 12440, Indonesia

Abstract
Soybean is very widely used in Indonesia, especially as a raw material for processed foods such as tofu and tempeh. This study aims to analyze the phytochemical content and proximate of variety irradiation soybean seeds Gamasugen 1 and Gamasugen 2. Phytochemical and proximate analysis on the seeds of soybean were carried out with quantitative and qualitative analysis. Proximate analysis analyzed included water content (oven method), ash content (furnace method), fat content (Soxhlet method), and crude fiber content (acid alkali digestion method). The results of phytochemical testing shows that both soybeans (Gamasugen 1 and Gamasugen 2) contain flavonoid as quercetin, alkaloid, saponins, phenolic, triterpenoid and glycoside. The proximate analysis results showed that Gamasugen 1 soybeans had a moisture content of 8.22%, lower than Gamasugen 2 which was 11.67%. Gamasugen 1 soybean content is 4.61%, lower than Gamasugen 2 which is 4.86%. Gamasugen 1 soybeans have a fat content of 14.50%, lower than Gamasugen 2 which is 15.51%. Gamasugen 1 soybeans have fiber content of 14.56%, higher than Gamasugen 2 soybeans which is 9.96%. The conclusion shows the highest proximate analysis of soybean is found in fat content (Gamasugen 2) which is 15.51% and the lowest level is found in ash content (Gamasugen 1) which is 4.61%.

Keywords
Gamasugen, irradiation, phytochemical, proxymate, soybeans

Topic
Biology

Link: https://ifory.id/abstract/NcLnhvjEfZ37

Corresponding Author
Putu Nita Cahyawati

Institutions
a) Department of Pharmacology and Pharmacy, Faculty of Medicine and Health Sciences, Warmadewa University, Bali, Indonesia
*putunitacahyawati[at]gmail.com
b,c,d) Department of Physiology & Biochemistry, Faculty of Medicine and Health Sciences, Warmadewa University, Bali, Indonesia
e) Department of IKK-IKP, Faculty of Medicine and Health Sciences, Warmadewa University, Bali, Indonesia

Abstract
Loloh is a traditional Balinese drink that is believed to be able to overcome certain diseases. The Balinese people make "loloh" independently for self-consumption or trading in small-scale home industry. The making of "loloh" is usually passed down from generation to generation. So, the outstanding circulation has not been standardized and with different ingredients. "Loloh cemcem" is one of the traditional drinks from The Penglipuran Village, Bangli Regency, Bali. This study aims to conduct phytochemical tests on "loloh cemcem" in Bali, especially from Penglipuran Village. Phytochemical tests include levels of alkaloids, steroids, terpenoids, phenolics, saponins, flavonoids, and tannins. The results of this study indicate that "loloh cemcem" produced in Penglipuran Village contains moderate levels of flavonoids and terpenoids (642.88 mg/100g), containing tannins, phenols, and alkaloids. In conclusion, "loloh cemcem" has the potential to be an antibacterial, antioxidant and another benefit that still needs further investigation.

Keywords
loloh cemcem, Bali, flavonoids, terpenoids, antioxidant

Topic
Pharmacology

Link: https://ifory.id/abstract/EJKRA76cN9Vx

Corresponding Author
Agus Hamdani

Institutions
Institut Pendidikan Indonesia Garut

Abstract
PicsArt is an image and collage editing application that allows its users to edit or create pictures and then share them in a social networking community. PicsArt users can create or edit interesting pictures based on their preferred theme. This study was aimed to utilize the PicsArt application to disseminate the Standard Dictionary of Indonesian (KBBI) and to introduce appropriate terminologies to the community in social networks. To date, many people do not know the appropriate terminologies or name of objects, for example the word kapak with kampak. Using PicsArt application, an image was displayed and underneath, the word kapak and kampak were written accompanied by green and red checklists. The green checklist indicated the correct terminology and the red checklist symbolized the incorrect one. After that, an explanation of the definition of the term was given. The method used in this study was qualitative descriptive. The results of this study indicated that the PicsArt application facilitated community members to capture the message conveyed through the images. The modified images made community members understand the meaning relevant to KBBI and increasingly recognize the correct terminologies.

Keywords
PicsArt Application, terminologies, social networks.

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/rANuJT7kbK26

Corresponding Author
Mokhammad Syafaat

Institutions
State Polytechnic of Malang

Abstract
Controlling a differential drive robot balancing system is a challanging task since it is highly unstable, non-linear and under-actuated system. This paper proposes a PID controller algorithm to balance the a differential drive robot at upright position. The system model derived using lagrangian method is discussed. The resulting mathematical model of the proposed closed-loop system was simulated. To verify the system performances, the real time experiments have been conducted. An arduino uno and an MPU6050 were used as the main controller and the main sensor, respectively. The PID parameters were manually tuned until the desired performance was achieved. From the simulation and the real time experiment results, the proposed method has demonstrated its capability to stabilize robot at upright position.

Keywords
Robot balancing; Controller; Stabilize robot

Topic
Electronics Engineering

Link: https://ifory.id/abstract/npNUZErL6PXz

Corresponding Author
Faruq Abdur Rouf

Institutions
a. Faculty of Engineering, Jakarta State University. Jl. Rawamangun Muka, East Jakarta, DKI jakarta 13220
*loeqfaruq[at]gmail.com
b. Faculty of Engineering, Jakarta State University. Jl. Rawamangun Muka, East Jakarta, DKI jakarta 13220
*arthur[at]unj.ac.id
c. Faculty of Engineering, Jakarta State University. Jl. Rawamangun Muka, East Jakarta, DKI jakarta 13220
*henita.rahmayanti[at]unj.ac.id
d. Faculty of Engineering, Jakarta State University. Jl. Rawamangun Muka, East Jakarta, DKI jakarta 13220
*arrismaulana[at]unj.ac.id

Abstract
This study aims to examine the level of suitability of the instrument in the Construction Sector of the Handicraft Sub-Sector Building for the Implementation of Plumbing Works issued by the Ministry of Public Works (PU) for SKKNI Kepnaker 2016-304 Plumbing planners, and developing these instruments. The research method used in this study is Content Analysis. The results showed that the instruments issued by the Public Works still did not thoroughly measure the competencies set forth in SKKNI Kepnaker 2016-304 Tukang Plambing, so the development of the instruments was necessary both content, constructs, and criteria, adjusted to the millennial era development.

Keywords
Instruments, Competence, Plumbing

Topic
Civil Engineering

Link: https://ifory.id/abstract/9HkC7fwZGz8Y

Corresponding Author
Diana Irvindiaty Hendrawan

Institutions
Department of Environmental Engineering, Faculty of Landscape Architecture and Environmental Technology, Universitas Trisakti, Jakarta, Indonesia

*Corresponding author: dianahendrawan[at]trisakti.ac.id

Abstract
Situ Parigi is located in Parigi Lama Village, Pondok Aren District, South Tangerang City. Based on the water quality measurements of Situ Parigi, BOD parameter has the highest concentration. This indicates that the type of waste that enters this water body is dominated by organic waste produced from domestic activities around it. The purpose of this study is to determine the pollutant load capacity of BOD in Situ Parigi. Pollutant load capacity is calculated using formulas in Minister of Environment Regulation No. 28 of 2009 concerning Capacity of Lake Water Pollution and/or Reservoir Load. Situ Parigi has an area of 4 Ha, an average depth of 0.98 m, a debit of 0.023 m3/sec and a hydraulic residence time of 18.25 days. Based on the calculations results, the pollutant load capacity of Situ Parigi is 3,169.81 kg/year but must accommodate a load of 20,553.15 kg/year. These results show that the pollution that occurs in Situ Parigi has exceeded its capacity. Control strategies such as dredging work and the construction of communal wastewater treatment plants could be carried out in an effort to reduce the occurring pollution levels.

Keywords
Organic wastewater; water pollution; pollution load capacity; control strategies

Topic
Environmental Engineering

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

Corresponding Author
Ana Widiana

Institutions
(a) Faculty of Science and Technology. UIN Sunan Gunung Djati Bandung. *anawidiana[at]uinsgd.ac.id
Jl. AH. Nasution No. 105 Bandung West Java Indonesia

(b) Faculty of Tarbiyah and Teaching Programme. UIN Sunan Gunung Djati Bandung
Jl. AH. Nasution No. 105 Bandung West Java Indonesia

Abstract
Utilization of cajuput leaf waste as a sheep feed, especially protein content (10.65%) has not met the SNI standard (> 15%).The addition of concentrate with high protein content is expected to increase the protein content in feed and improving the quality of feed (especially ammonia (NH3) production in rumen).The purpose of this research was to know the effect of addition of concentrate in increasing the protein content and also the potential of cajuput leaves waste mixture with field grass as a sheep feedby in vitro test. The experiment used a complete randomized design with three treatments(R1 = 50% field grass + 50% concentrate; R2 = 25% cajuput leaves waste + 25% field grass + 50% concentrate; R3 = 50% cajuput leaves waste + 50% concentrate)with four repetitions. Statisticstest with Anova followed by Duncan test. The results showed that the addition of concentarte to mixtured of waste cajuput leaves and field grass can increased the protein content in feed and affectedtothe production of NH3, VFA, and the digestibility of feed.From various aspects,treatment of R2 most likely to be used for sheep feed.

Keywords
feed, in vitro, Melaleuca cajuputi, Waste

Topic
Biology

Link: https://ifory.id/abstract/BX3bZhVDkapW

Corresponding Author
Dewa Ayu Putri Sri Masyeni

Institutions
Faculty of Medicine and Health Sciences, University of Warmadewa

Abstract
Pramenstrual syndrome (PMS) is a collection of physical, psychological and emotional symptoms associated with a womans menstrual cycle; symptoms usually occur 6-10 days before menstruation and disappear when menstruation begins. Generally the impact of the STDs is the disruption of daily activities. Especially for young women who attend school, STDs can interfere with the quality of health, concentration, achievement and active learning activities in schools. This research was conducted in October 2017 until December 2017 at SMAN 1 Blahbatuh. This research is descriptive research using cross sectional approach. The sample in this study amounted to 105 students of class X which was obtained by simple random sampling method. Based on sampling result, got sample 105 people, with sampling method using lottery. The result of the research shows that female students experienced PMS 71,8%. The severity of PMS symptoms in moderate to severe levels is 69.5%. Most girls experienced their first menstruation at the age of 12-13 years as much as 65.7%. Based on the results of this study, the researchers suggested to the school to be able to provide health promotion either directly through counseling, or indirectly through health media associated with premenstrual syndrome.

Keywords
Premenstrual syndrome, student, high school

Topic
Biology

Link: https://ifory.id/abstract/X9cpWEFbn4BH

Corresponding Author
Muhammad Taufiq Fathaddin

Institutions
a)Petroleum Engineering Department, Universitas Trisakti,
Jakarta, Indonesia
*)mmarissa89[at]gmail.com
b)PPPTMGB Lemigas, Jakarta, Indonesia

Abstract
In this study, CO2 Flooding simulation models were used to predict oil recovery. The models were previously validated by laboratory experiments of Continuous Injection and Water Alternating Gas (CO2) injection for miscible condition. Sensitivity test was performed to attain the best injection rate parameters.The simulation experiments indicated that the optimal performance for both methods obtained at injection rate of 0,09 cuft/day. The scenarios of continuous CO2 injection showed that the maximum recovery factor (RF) is 21%. While the scenarios of Water Alternating Gas, the maximum RF is 38%. Based on the whole scenarios used, WAG displacement resulted in more effective RF value than Continuous Flooding, within the range of injection rate studied.

Keywords
CO2 Injection, Simulation, Recovery Factor

Topic
Chemical Engineering

Link: https://ifory.id/abstract/eAnrc9zYMEdt

Corresponding Author
Anita Susanti

Institutions
Civil Enginering, Institut Teknologi Sepuluh Nopember Surabaya, Surabaya, 60111, Indonesia

Abstract
The existence of a stretch of the Commuter Train Service in The City is very limited. The limitations of The Commuter Train Service, require Operational Planning for Commuter Train Service in Underserved Area. Areas that have not been served by public transportation are Areas Outside The Area of Influence. The influence area is the area where the Commuter Train Passenger feels comfortable by walking or using other modes when heading and leaving the train station. Urban mass transit planning requires data about the area of influence in terms of the use of modes used. These data include travel behaviour characteristics consisting of networks and modes used to go or leave the station. This study aims to obtain data to predict the area of influence of Access and Egress of commuter line Surabaya-Lamongan based on the travel behaviour characteristics survey. The interview survey was conducted on 311 SULAM Commuter Train Passengers and analyzed using the Chi Square Statistical Test. The results of the research can be stated that the area of influence for commuter Access and Egress is 3 Km. The benefits of the research results can be used as a New Pathway for Commuter Train Services in Unserved Area.

Keywords
Prediction, Area of Influence, Access, Egress, Commuter Train Prediction, Area of Influence, Access, Egress, Commuter Train Prediction, Area of Influence, Access, Egress, Commuter Train Prediction, Area of Influence, Access, Egress, Commuter Train

Topic
Civil Engineering

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

Corresponding Author
Shendi Suryana

Institutions
Universitas Garut

Abstract
Rose Guava (Syzygium jambos (L.) Alston) is known to have flavonoid compounds. Where flavonoids are natural product compounds that have uses as a treatment. An alternative method used to determine the prediction of total flavonoid levels is a combination of FTIR and Chemometrics (Partial least square regression) through the parameter RMSEC value (Root mean square error of calibration), RMSECV (Root mean square error of validation), PRESS (Predicted residual error sum of squares) and R2. The results of the combination of FTIR and CEMOMETRICS (Partial least square regression) on the prediction of total flavonoid levels can provide a good model with calibration obtained R2 value 0.9999, RMSEC 0.0000637 and the results of vaid obtained PRESS value 0.19225, R2 0.978 and RMSECV 0.041 . Based on the literature, the model can be said to be good if the RMSEC and RMSECV values are smaller than R2.

Keywords
Flavonoid, Rose guava, Chemometri

Topic
Chemistry

Link: https://ifory.id/abstract/Fq98c6DQbxLv

Corresponding Author
Nur Lukman

Institutions
a,c,d,e. Department of Informatics, UIN Sunan Gunung Djati Bandung,
b. Department of Information, System Sangga Buana YPKP University Bandung

Abstract
The National Examination in 2018 is no longer the only determinant of student graduation from their school, however the score of the national examination in 2018 has decreased from average value of 55.51 to 52.96. One of the reasons is that students found difficulties to predict the questions that probably appeared on the exam sheet. This research aimed to help students predict the questions that probably appeared, so that the average value hopefully will be increased. The prediction of the questions that probably appeared on the exam had been done by processing data of the questions used for national examinations several years ago using C 4.5 Algorithm. C 4.5 Algorithm is a Data Mining technique that can classify predictive questions and it is able to form a prediction of questions on the exam. The result showed that the prediction of questions that probably appeared on exams by using Algorithm C 4.5 had good performance and its accuracy is 70 %

Keywords
National Examination; Data Mining; C 4.5 Algorithm

Topic
Computer Science

Link: https://ifory.id/abstract/dNJHTqVZaPe7

Corresponding Author
Rima Kusuma Ningrum

Institutions
Medical Education Unit Faculty of Medicine and Health Sciences, Warmadewa University

Abstract
Becoming a medical student must pass lot of rigorous entrance test. The tests include material test, academic potential test, health test and interview test. The test is expected to have predictive value for academic achievement of student. Academic achievement student reflected as block test. This study aims to predict entrance test of academic achievement. This study correlates material test and academic potential test with block test in semester 1 for student academic year 2018 (n= 107 students). Spearman correlation was conduct to determine correlation between material test and academic achievement with block test students in semester 1. There were negative correlation of material test with block test (-0.219, p<0.05) and positive correlation of academic potential test with block test (0.452, p<0.01) in semester 1. This study shows that the students who have high material test has lower block test and students who have high academic potential test have higher block test. Academic potential test can predict the academic achievement of medical students.

Keywords
Predictive value, entrance test, academic achievement

Topic
Management Science

Link: https://ifory.id/abstract/FxLEv4QzmHeA

Corresponding Author
Riser Fahdiran

Institutions
1) Department of Biology, Faculty of Mathematics and Natural Sciences, University of
Indonesia, 16424 Depok, West Java, Indonesia
2) Environment and Forestry Research and Development Institute of Manado, Adipura road, Kima Atas, Mapanget, 95259 Manado, North Sulawesi, Indonesia
3) Faculty of Mathematics and Natural Sciences, State
University of Jakarta, Rawamangun Muka road No. 1, 13220 East Jakarta, Indonesia

Abstract
Early pregnancy diagnostic is very important to support the attempt of fauna preservation. Lowland anoa is an endangered endemic species for Sulawesi Island and Buton. This species has natural wild characteristic and aggressive, intensified with silent heat effect which often occurs in this lowland anoa, makes it hard to detect its estrous cycle and pregnancy. The research is aimed to observe and morphology changing in pregnancy, and to find out diagnostic accuracy in pregnancy of lowland anoa using abdominal ultrasonography. Ultrasonography abdominal checking was used with 95% alcohol as transduction medium. Ultrasonography method was performed before mating and at day-21, day-191, and day-218 post natural mating using one dwarf female buffalo of 9 years old. Result showed that lowland anoa act was changing in 2nd after mating until 6th month before giving birth. Their morphological changing had shown in 3rd month, 6th month and 8th. In the 9th month the milk udder has enlarged. Based on the result of ultrasonography on day-21, it is very difficult to find the gestational sac. However, on day-191, the fetus spine, head, heart and lungs are clearly visible.

Keywords
Lowland Anoa; Pregnancy; Behavior; Ultrasonography

Topic
Biology

Link: https://ifory.id/abstract/aVAxgfzC8eRD

Corresponding Author
Dewa Gede Hendra Divayana

Institutions
a) Department of Mathematics Education, Universitas Pendidikan Ganesha
Jalan Udayana No. 11, Singaraja, Bali, Indonesia
b) Department of Medical, Universitas Pendidikan Ganesha
Jalan Udayana No. 11, Singaraja, Bali, Indonesia
c) Department of Information Technology Education, Universitas Pendidikan Ganesha
Jalan Udayana No. 11, Singaraja, Bali, Indonesia
*hendra.divayana[at]undiksha.ac.id

Abstract
Evaluation activities are essential to be conducted to measure the effectiveness level of the ICT-based learning process in colleges, including also specifically for health colleges. Evaluation models that are often used to measure ICT-based learning effectiveness in health colleges are formative-summative models. However, reality shows that the evaluation model is not effective. The problems solving to overcome that problem is to develop a new evaluation model in the form of CIPP (Context-Input-Process-Product) model based on SAW (Simple Additive Weighting) so that it can show the assessment accuracy level to ICT-based learning quality aspects. This study purpose was to know the initial design of the CIPP model based on SAW. This research uses the Borg & Gall development method, which focuses on the model design phase. Subjects involved in designing this evaluation model were three peoples with academic classifications in the fields of information technology, educational evaluation, and health. The research results showed that there was a clear evaluation model design using CIPP evaluation components and SAW methods in conducting learning evaluation.

Keywords
Model; Evaluation; CIPP; SAW; Effectiveness

Topic
Information Engineering

Link: https://ifory.id/abstract/xKrDH6pZATCF

Corresponding Author
Yheni Mulyaningsih

Institutions
(1)Department of Mechanical Engineering, Sampoerna University, Jl. Raya Pasar Minggu, Kav 16, Jakarta 12780, Indonesia
(2) Department of Applied Physics, Sampoerna University, Jl. Raya Pasar Minggu, Kav 16, Jakarta 12780, Indonesia

*aditiya.harjon[at]sampoernauniversity.ac.id

Abstract
In a mission to reduce the world-s dependency on non-renewable energy sources, through decades, researches are striving to find the best alternative energy substitutions. Considering the abundance availability of renewable sources, green algae are discovered as one promising candidate of future energy alternative. The aim of this research is to study the bioethanol production from green algae through acid hydrolysis. In this study, the acid hydrolysis was performed by utilizing sulphuric acid (H2SO4) at concentration range of 1.0M-2.0M. Further, hydrolysis temperature was also varied at 50, 70 and 90°C. In this stage, a fixed hydrolysis period was set for 30 minutes. As acid pretreatment is considered in this study as an effective way to convert carbohydrates into fermentable sugars, the sugars produced in this experiment would lead to an excellent grade of bioethanol produced. From the obtained result, green algae show a feasibly potential as the third generation bioethanol feedstock, which worth for substituting the use of fossil fuel in the near future.

Keywords
bioethanol; green algae; acid hydrolysis;

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/zgBR6k3F4XAU

Corresponding Author
Astri Rinanti

Institutions
Universitas Trisakti

Abstract
This research aims to know the waste cassava peels is cleaned for glucose levels that will be used as raw material for fermentation process through bioethanol. Cassava peels contain lignosellulosic which consist of 43% cellulose, 38% hemicellulose, and 19% lignin. This research process is done in two stages, namely the process of pretreatment/delignification and hydrolysis. Delignification is done by making use of Aspergillus fumigatusi in Potato Dextrose Broth medium and performed a cassava peels is cleaned up to size 40 mesh. Pretreatment uses the variation comparison of fungi against raw material of 1:1, 1:3, 1:5 and the contact time of 1, 3, and 5 days. The analysis stage pretreatment using Chesson method. Phase hydrolysis sulfuric acid (H2SO4) 1% and heated at a temperature of 100oC for 2 hours. The analysis phase hydrolysis using DNS method to get sugar levels. In this study, obtained the best levels of lignin after pretreatment is by 8% and the research proves that cassava peels delignification retrieved from enzymatics activity of Aspergillus fumigatus and produces 10% of the total sugar samples is used. Further research needs to be done to increase sugar levels from raw cassava peels.

Keywords
Cassava peels, enzimatyc, lignosellulosic, Aspergillus fumigatus, waste.

Topic
Environmental Engineering

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

Corresponding Author
Farid Perdana

Institutions
1. Program Studi Farmasi, Fakultas Matematika dan Ilmu Pengetahuan Alam Univesitas Garut Jl. Jati No. 42 B Tarogong Garut, Jawa Barat
*farid[at]uniga.ac.id

Abstract
Compounds in plants can inhibit or even kill cancer cells so that they have the potential as anticancer agents. One of the potential plants as an anticancer agent is the annonaceae family. This reserch as a screening method using Brine Shrimp Lethality Test is to find out the cytotoxic activity of soursop leaves, srikaya leaves, and nona leaves. The result of the preliminary test of cytotoxic activity of ethanol extract of soursop (Annona muricata L), srikaya (Annona squamosa L) and nona (Annona reticulata L)leaves showed cytotoxic activity wilth LC50, respectively 30,90; 38,01; dan 46,77 ppm. Based on the results of the study all extracts have cytotoxic activity. The highest cytotoxic value was shown by soursop leaf ethanol extract with LC50 value of 30,90 ppm.

Keywords
BSLT, Annonaceae Family, Cytotoxic

Topic
Biology

Link: https://ifory.id/abstract/YfqgtGUW6KBD

Corresponding Author
Yusmaniar Yusmaniar

Institutions
a)Departement of Chemistry Faculty of Match and Science Universitas Negeri Jakarta, Jln Rawamangun Muka, Jakarta Timur 13220, Indonesia
b) National High Jakarta School
Jln. Raya Pos pengumben no.41 Jakarta 11630, Indonesia

*Email : yusmaniar[at]unj.ac.id 

Abstract
Anticipating the global trends of biodegradable plastic and its application to packaging industries, this study was conducted to prepare a seaweed ( Eucheuma cottonii ) based biodegradable plastic blended with polysaccharides derived from various tropical fruit seeds which are abundantly available in Indonesia such as avocado, jack fruits and durian. The objective is to prepare an environmentally friendly and edible bioplastic. The various polysaccharides was obtained through extraction and the bioplastic blends were heated at 80oC for 30 minutes.  The characterization conducted include mechanical properties, thermal and biodegradability analysis, spectral and surface analysis through Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM) respectively.

Keywords
Bioplastic; Edible; Polysaccharides; Seaweed (Eucheuma cottonii)

Topic
Material Engineering

Link: https://ifory.id/abstract/tKem3Trwj6VP

Corresponding Author
Surya Lubis

Institutions
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala

Abstract
Modification of hematite (α-Fe2O3) with ZnO to produce ZnO/α-Fe2O3 composites by sol gel method and their photocatalytic activity testing on the degradation of indigo carmine (IC) dye has been done. The hematite was extracted from iron sand taken from Syiah Kuala Beach, Deah Raya, Aceh Province by using hydrochloride acid and co-presipitated by using ammonium hydroxide. The ZnO/α-Fe2O3 composites were prepared with the mol ratio of ZnO to α-Fe2O3 1:5, 5:1 and 1:1. The characterization by using X-Ray Difractions (XRD) and Scanning Electron Microscopy Energy Dispersive X-Ray Spectroscopy (SEM-EDS) was conducted in order to study the physical and chemical properties of the materials. The result of photocatalytic activity test showed that composites with the mol ratio of ZnO to α-Fe2O3 1:5 has the highest photocatalytic activity with the percent of degradation (% D) of IC are 91,67% and 93,18% under UV light and sunlight irradiation, respectively. These highest of photocatalytic activity was obtained at the initial pH of dye solution =1, photocatalyst dosage of 300 mg, initial dye concentration was 15 ppm and irradiation time 120 minutes under UV light and 90 minutes under sunlight.

Keywords
hematite; ZnO; indigo carmine: photocatalyst; sol gel

Topic
Chemistry

Link: https://ifory.id/abstract/MnqXHC7E2fmA

Corresponding Author
Mega Novita

Institutions
a) Faculty of Engineering and Informatics, Universitas PGRI Semarang, Jl. Sidodadi-Timur No.24 Semarang, Central Java 50232, Indonesia
*novita[at]upgris.ac.id
b) Lembaga Penelitian dan Pengabdian Kepada Masyarakat, Universitas PGRI Semarang, Jl. Lontar No.1 Semarang, Central Java 50232, Indonesia
c) School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen Sanda, Hyogo 669-1337 Japan

Abstract
Ruby, or the trivalent chromium ion activated in alumina crystal ((alpha)-Al(_{2})O(_{3}): Cr(^{3+})), needless to say, is a beautiful gemstone and known as the first solid-state laser in history. The so-called "ruby pressure scale" using its fluorescence lines is particularly popular in high-pressure science because of the simplicity and the accuracy of optical measurements in the diamond-anvil cell (DAC) experiments. Therefore, here performed first-principles band-structure calculations on the effect of external pressure on ruby bond length without referring to any experimental parameter. Cambridge Serial Total Energy Package (CASTEP) code was utilized to estimate the lattice relaxation effect as the external pressure applied which results in the ruby bond length. Firstly, we carried out the structural optimization of the pure (alpha)-Al(_{2})O(_{3}) crystal and then followed by the geometry optimization of (alpha)-Al(_{2})O(_{3}): Cr(^{3+}). The results show that Al-O bond lengths of the pure (alpha)-Al(_{2})O(_{3}) crystal and Cr-O bond lengths of (alpha)-Al(_{2})O(_{3}): Cr(^{3+}) decreased as the applied pressure increased.

Keywords
pressure, first-principles, CASTEP, a-Al2O3

Topic
Material Science

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

Corresponding Author
ni wayan winianti

Institutions
a) Faculty of Medicine and Health Science, Warmadewa University, Bali, Indonesia
Jl. Terompong No.24 Tanjung bungkak, Denpasar, Bali, Indonesia, 80235
winiantiniwayan84[at]gmail.com

Abstract
Taeniasis is a neglected infectious disease caused by eating raw/undercooked beef or pork (Taenia sp.) containing infective cysticercus larvae. Humans can become infected with these tapeworms by eating raw or undercooked beef (T. saginata) or pork (T. solium and T. asiatica). In rural areas of Gianyar including Guwang village, pork or beef"lawar"and roasted pig are consumed as local traditional food since long time ago as part of indegenous Balinese culture. The existence of individual slaughtering of pigs in Guwang village for ceremonies or parties without supervision from the animal health department is thought to increase the risk of taeniasis. Purpose of the study was to known prevalence of taeniasis in Banjar Buluh, Guwang Village and determine risk factors or the relationship between meat consumption and individual characteristics with taeniasis. Observational cross sectional study was used to identify taeniasis and risk factors in people living at Buluh, Guwang village consisted of 110 people. Two subjects from the group were positive for taenia egg both by direct smear methods. Proportion of taeniasis in the case group was 1.8%. The type of meat consumed, methods of meat processing, frequency of consumption, ways of obtaining meat and individual characteristics which may contribute to Taenia infection could not be evaluated due to limited number of positive cases.

Keywords
Taeniasis, Direct Smear Method, Taenia sp.

Topic
Biology

Link: https://ifory.id/abstract/mqvAtg3f6VBC

Corresponding Author
Dewa Ayu Putri Sri Masyeni

Institutions
Faculty of Medicine and Health Sciences, University of Warmadewa

Abstract
Obstructive sleep apnea (OSA) is a respiratory illness with the involvement of sleep disorders that have a characteristic ofrecurrent collapse of pharynx airway during sleep. OSA has a serious physiological and psychological impact if left untreated. OSA complications can be divided into 2, namely neurocognitive dysfunction and cardiovascular disease. This will affect the quality of life of the patients, including low quality of sleep, reduced cognitive function, and decreased productivity. The purpose of this study is to determine the prevalence of high risk of OSA in employees and lecturers at Warmadewa University. This research is using descriptive research method with cross sectional design. The sample in this research is employee and lecturer of Faculty of Medicine and Health Sciences at University of Warmadewa taken at random. The independent variables were snoring, daytime sleepiness, obesity, and high blood pressure. Dependent variable is obstructive sleep apnea. The study used primary data, which the data collected by interviewing and distributing Berlin questionnaire and measuring body mass index of employees and lecturers of Warmadewa University. Data analysis used descriptive analysis with Statistical Package for The Social Science (SPSS) program. There were 12 (15.18%) employees and lecturers at high risk of OSA based on the Berlin questionnaire. It is expected that the puskesmas can optimize its role in carrying out advanced screening to detect OSA in the community.

Keywords
Obstructive sleep apnea, prevalence of obstructive sleep apnea, employee and lecturer

Topic
Biology

Link: https://ifory.id/abstract/7tyrAF3Mvmeb

Corresponding Author
Dewa Ayu Putri Sri Masyeni

Institutions
Faculty of Medicine and Health Sciences, University of Warmadewa

Abstract
The desire to create the best possible work, increased demands such as accuracy and speed of work cause employees to stay in front of the computer for long periods of work, so that it may be at risk of asthenopia disturbance. One of the occupations that are at risk for impaired asthenopia are employees who use computers at the Federal International Finance (FIF) Group Bali. This study aims to determine the percentage of asthenopia disorders based on asthenopia symptoms experienced. This research uses descriptive method with cross-sectional approach. The variables included asthenopia disorders, age, gender, VDT settings, screen filters, duration of work, and rest duration, room and angle lighting formed between the top of the monitor and the midpoint of the screen. The sample of this research is all employees who use computer in FIF Group Bali. Data collection in this study using Computer Vision Quistionnaire using Likert scale that has been validated. Data were analyzed descriptively with univariate computer aid. The result of the research showed that the most common complaint was headache as many as 38 respondents (79.16%). The incidence of asthenopia in the age group of 21-40 years was a headache of 28 respondents (58.4%), and at the age of 41-60 years was a headache of 10 respondents (20.9%). Based on sex, the prevalence of asthenopia in males is headache as much as 21 respondents (43.8%), in women is close blurry vision as much as 17 respondents (35.5%). The highest prevalence of asthenopia in room lighting settings <200 lux was headache as much as 19 respondents (39.6%), while in room lighting 200 lux-500 lux was blurred vision with as many as 10 respondents (23%).

Keywords
asthenopia, VDT operator, computer vision questionnaire, FIF Group Bali

Topic
Biology

Link: https://ifory.id/abstract/wZ8z76t9f2cL

Corresponding Author
Ayu Rahmaniyah

Institutions
(a*) Students of Civil Engineering Department, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo, Surabaya, 60111, Indonesia
ayuramukti[at]gmail.com
(b) Civil Engineering Department, Institut Teknologi Sepuluh Nopember (ITS)
(c) Regional and Urban Planning Department, Institut Teknologi Sepuluh Nopember (ITS)

Abstract
The Pasuruan City Government has carried out activities to improve the quality of local road infrastructure in slum areas through the NUSP program, in order to realize the target city without slums in 2020. The sustainability of this local road function is strongly influenced by the sustainability of infrastructure assets management stages starting from the planning and construction, operation, and maintenance that conducted by the Utilization and Maintenance Groups (KPP). This study aims to determine the priority factors for the development of the sustainability of local road functions in slums with community-based management in Pasuruan City. Determination of priority factors is carried out by assessing the suitability of the sustainability factors through the assessment of questionnaires to the KPP, while the priority factor for the development of sustainability with the method of Borda analysis is based on the experts assessment. The results of this study indicate that in the operation stage the factors that need to be prioritized are the physical condition of the infrastructure, the management quality and the strengthening of institutional capacity. Whereas in the maintenance stage, it is necessary to prioritize the management quality, monitoring and evaluation, and coordination with the government.

Keywords
Local Road; Sustainability Functions; Priority Factors; Community Based Management

Topic
Civil Engineering

Link: https://ifory.id/abstract/P6D3BgEmvRNH

Corresponding Author
Mukhlisah Hanubun

Institutions
a) Professor at State University of Jakarta, Indonesia
b) Magister Student, State University of Jakarta, Indonesia,
c) State University of Jakarta, Indonesia
d) State University of Jakarta, Indonesia
e) State University of Jakarta, Indonesia

Abstract
Penelitian dilakukan untuk menjelaskan hubungan antara Kepemimpinan Instruksional dan Locus Of Control terhadap Pro Ecology Behavior Siswa. Metode yang digunakan adalah metode survey. Adapun pengambilan sampel dilakukan dengan cara multistage random sampling hingga terpilih 100 siswa MAN 6 Jakarta Timur orang sebagai sampel. Uji regresi dan analisis korelasional digunakan untuk memverivikasi hubungan antara variabel. Data penelitian diperoleh dari hasil pengukuran yang menunjukkan bahwa terdapat hubungan positif antara Kepemimpinan Instruksional dan Locus Of Control terhadap Pro Ecology Behavior Siswa, baik sendiri maupun bersama, baik dikontrol maupun tidak. Kepemimpinan guru atau yang diistilahkan kepemimpinan instruksional adalah salah satu faktor situasional dalam teori perilaku, sehingga penelitian ini mengkorelasikan faktor internal yaitu Locus Of Control dengan faktor situasional yaitu Kepemimpinan Instruksional dan pengaruhnya terhadap Pro Ecology Behavior Siswa. Semakin tinggi Kepemimpinan Instruksional dan Locus Of Control, maka semakin tinggi pula Pro Ecology Behavior Siswa.

Keywords
locus of control, kepemimpinan instruksional, ecology behavior

Topic
Environmental Engineering

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

Corresponding Author
Sugeng Rifqi Mubaroq

Institutions
a) Universitas Pendidikan Indonesia, Bandung Indonesia
*mubaroq[at]upi.edu
b) Universitas Komputer Indonesia, Bandung Indonesia
c) Sekolah Tinggi Bahasa Asing Yapari-ABA, Bandung Indonesia
d) Universitas Nasional Pasim, Bandung Indonesia
e) Universitas Widyatama, Bandung Indonesia

Abstract
The objective of this study is to make digital platform design as the innovative solution to overcome an unemployment problem in West Java. West java has been in the highest position of unemployment in Indonesia. It has been caused not only by social but also by cultural matter. Moreover, West Java has become the favorite destination for migrants from other provinces to seek for jobs and to go to study. This study used the method of a socio-technical system analysis by combining social and technical aspects as the basic analysis to solve this problem. The steps of this analysis done in this study were by documental observation and data statistical process. The result of this study will be the digital platform designs that are web and mobile named as UDUNAN. This platform will be a community from various groups in which concern about solving the problem of unemployment through online forums, workshops, and free entrepreneur trainings.

Keywords
socio-technical system; platform; unemployment

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/6rp3HUMFTCzu

Corresponding Author
Dini Turipanam Alamanda

Institutions
a) Faculty of Social and Politic Sciences, Garut University Samarang 52, Garut, 44151, Indonesia
b) Faculty of Economics, Garut University, Samarang 52, Garut, 44151, Indonesia
*alamanda.dini.2017[at]gmail.com
c) School of Economics and Business, Telkom University, Telekomunikasi 1, Bandung, 40257, Indonesia

Abstract
This study aims to discover what has been done by BPPT Bandung in making the implementation the strategy of Integrated Licensing Services Agency to make Hay.U application Bandung to be effective. The factors used to analyze it is PIECES consisting of performance, information, efficiency, control, economy, and service. Using a qualitative approach, interviews with a number of stakeholders were conducted to get a comprehensive overview of the application which presently becomes the mainstay of Bandung city government. The results of this study reveal that Hay.U can overall support the performance of users and employees. In addition, Hay. U is also able to improve the accuracy of information which can make online licensing system in Bandung effective. However, the Integrated Licensing Service Agency (BPPT) needs to consider the convenience factor for the users when inputting data. Users still have problems with the new technology and the amount of data needing to be attached.

Keywords
e-Government; New Technology; website application

Topic
Information Engineering

Link: https://ifory.id/abstract/MR3TqLyfV2cZ