Indonesia Conference Directory

Corresponding Author
Riser Fahdiran

Institutions
1) Department of Biology, Faculty of Mathematics and Natural Sciences of Universitas Indonesia, Depok, West Java, Indonesia
2) Division of Reproductive, Endocrinology and Infertility, Department of Obstetrics and Gynaecology, Faculty of Medicine University of Sumatera Utara, Haji Adam Malik General Hospital, Medan, Indonesia
3) Halim Fertility Centre, Stella Maris Women and Children Hospital, Medan, Indonesia
4) Faculty of Mathematics and Science, Universitas Negeri Jakarta, East Jakarta, Indonesia

Abstract
Oocyte maturation rate is an important factor in determining a good fertilization and embryo development rate with in vitro fertilization. Embryos that can develop until blastocyst stage have been proven to have a higher success rate than cleavage stage embryos. The aim of this study is to find out effect of age and body mass index (BMI) in oocyte maturation rate and the successfulness of blastocyst development. In this study, 158 infertile women within age range of 22-47 who underwent IVF-ICSI program in Halim Fertility Center were analyzed. The IVF-ICSI outcomes assessed were number of oocytes retrieved (OR), number of matured oocytes (MO), fertilization rates (FR), cleave rates (CR), the blastocyst rates (BR), and the pregnancy rates (PR). All data were divided into three groups based on WHO BMI classification (normal range, overweight and obese) and four groups based on age classification (up to 30, 31-35, 36-40, below 41). These data were analyzed with student T test method and chi-square. In result, our study concludes that the body mass index shows a negative effect of oocyte maturation process and blastocyst development. However, age had an adverse impact on number of oocyte retrieved, number of matured oocyte, and blastocyst rates.

Keywords
Oocyte Maturation; Blastocyst; Age; Body Mass Index.

Topic
Biology

Link: https://ifory.id/abstract/xkpcjhA8MyZw

Corresponding Author
Arif Hidayat

Institutions
Universitas Bina Darma

Abstract
The purpose of this study was to determine the effect of agility ladder training on the agility of the student of the futsal extracurricular Bina Darma University Palembang. The research method used in this study is a quasi-experimental method. The design of the research design used in this study was one group pretest-posttest design. A sample of 24 people participated in the Bina Darma University futsal extracurricular activity. The technique of collecting data uses an agility test instrument, namely Illinois Agility Run. The results of the study revealed that the average score of agility pretest obtained by students was 19.05 seconds while for the average value of posttest (final ability test) student agility was 18.99 seconds. Normal and homogeneous distributed data because the results of the Kolmogrov Smirnov test and the data homogeneity test show that the large sig value is 0.05, so that it is continued with the paired t-test results obtained that the t-count value 1.930 is greater than the t-table 1.714 at a significant level of 0.05%. Thus it can be concluded that there is a significant influence agility ladder training for agility at participants futsal extracurricular Bina Darma University of Palembang.

Keywords
Agility Ladder; training; Futsal

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/hRj7FtzDnK8J

Corresponding Author
Iqbal Fajarullah

Institutions
Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No. 229 Bandung 40154 Jawa Barat - Indonesia

Abstract
This research is about observation of validity and reliability of ability agility Bangsbo Sprint Test to the football player. Ability agility is most important aspect to be an athlete in every sport chapter. This purpose research to explain the level of validity and reliability of ability agility Bangsbo Sprint Test. Method used in this research is descriptive method. This research is conducted in UKM Sepak Bola UPI Bandung use purposive sampling technical from 16 members of UKM Sepak Bola UPI Bandung U-21. Based on result study, produce results of ability agility Bangsbo Sprint Test have validity level in the amounts of Γ= 0,749 include the medium level and the results is significant. Reliability test in the amounts of Γ= 0,935 include the high level and the results is significant. Based on result study, the conclusion is ability agility Bangsbo Sprint Test can be reference to measure instrument of ability agility cause have validity and reliability values with standard scale is used to give meaning of test results to help the coach to evaluation training process with data test results.

Keywords
Validity; Realibility; Ability Agility; Football

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/r68N4MkmKaz3

Corresponding Author
Ai Mahmudatussa\-adah

Institutions
1Universitas Pendidikan Indonesia, Bandung Indonesia
2Institut Teknologi Bandung, Bandung Indonesia

Corresponding autor : aims[at]upi.edu

Abstract
ABSTRACT Purple sweet potato (Ipomoea batatas L) contains many acylated anthocyanins which are beneficial for human health. Purple sweet potato roots are easily damaged due to the high water and nutrient content. To extend the shelf life of purple sweet potatoes can be done by a drying process. The drying process can affect the color and amount of anthocyanin. The purpose of this study was to analyze the effect of blanching on color and the amount of anthocyanin of dried slice purple sweet potato. The blanching method studied was steam blanching with a temperature of 70oC-80 oC and blanch with boiling water 90 oC – 98 oC for 2 minutes. To measure the amount of anthocyanin by the pH difference method and measure color using the chromameter tool. The results showed that the steam blanching technique produced a higher color and amount of anthocyanin of dried chips purple sweet potato compared to blanching boiling water. This is because Anthocyanin dissolves in water. The conclusion is to get the color and the relatively high amount of anthocyanin in dried pieces of purple sweet potato can be done by steam blanching.

Keywords
Anthocyanin; blanching; Ipomoea batatas; purple sweet potato

Topic
Chemistry

Link: https://ifory.id/abstract/ugCcWeaQTA4t

Corresponding Author
Arif Rahman

Institutions
Universitas Negeri Jakarta

Abstract
The synthesis of a composite series of Kaolin / Zeolite LTA were synthesized out through crystalline phase mixing and heating process at various temperatures. The composite syntesized were characterized by using SEM, XRD and FTIR, TGA and surface area analyzer. XRD analysis showed that crystal structure and amorphous phaseformed due to heating. The increasing of calcination temperature decreases LTA crystallinity significantly in line with increasing of temperature. Meanwhile FTIR spectroscopy provides information on changes in functional groups due to heating. TGA provides information on the amount of mass lost during heating due to the release of functional groups on LTA zeolite. Meanwhile N2 physisorption showed information on decreasing surface area due to increased temperature as a result of decreasing of pore volume due to heating. The calcination temperature of composites changes the composite pore structure

Keywords
composite, Kaolin/Zeolite LTA

Topic
Material Science

Link: https://ifory.id/abstract/yNtuF7h9LM6P

Corresponding Author
Sulwan Permana

Institutions
Department of Civil Engineering, Sekolah Tinggi Teknologi Garut, Jl. Mayor Syamsu 1, Garut 44151, Indonesia
sulwanpermana[at]sttgarut.ac.id

Abstract
The existence of rivers in an area is very important because it is often used by the community for daily needs. In addition to the availability of raw water, it is also used for agricultural purposes. Cipalebuh River with 42 km2 of river flow area is a river in the southern part of Garut Regency; this river is used for drinking water supply and for irrigating 1016 ha of rice field area. The purpose of this study was to determine the magnitude of changes in the Cipalebuh river flow due to changes in climatological parameters such as average air temperature, average relative humidity, average wind speed, duration of solar radiation, air pressure, and solar radiation. The rainfall stations in the Cipalebuh river basin are the Pameungpeuk and Cisompet rainfall stations. Calculation of discharge using simulation method from F.J. Mock, while calculating evapotranspiration with the Penman-Monteith method. The net need for water in the rice fields is 1.4 lt/sec/ ha. Based on the results of the calculation of the effect of changes in climatological parameters it does not significantly affect the flow of water in the Cipalebuh river so that the availability of raw water and irrigation is not much disturbed.

Keywords
Climatological; Discharge; The Water Availability.

Topic
Civil Engineering

Link: https://ifory.id/abstract/T8aZMCwvLfYU

Corresponding Author
himawan hadi sutrisno

Institutions
Universitas Negeri Jakarta

Abstract
Silica is one of chemical elements, which contains a high thermal characteristic compared to other substances. Therefore, this element is frequently utilized as an additional element that can withstand fire propagation rate by providing heating variation in silica production such as 15 minutes, 30 minutes, 45 minutes and one hour of heating time. It gives an impact toward the thermal characteristic from the production process of the silica gel with KOH solvent. The thermal characteristic is tested by using a thermogravimetric analysis. Meanwhile, in order to discover a decrease of the fire propagation rate, a test is conducted with flammability test with paper medium coated by the silica gel. From TGA result, in 300°C temperature, the silica gel heated in the equipment does not experience many changes of mass, although when the temperature is increased to 600°C, there is still a relatively high residual material compared to the initial mass. The test result using TGA and flammability test shows that the silica gel extracted from the rice husk ash by using KOH solvent with 15 minutes of heating time contains a good thermal characteristic compared to other variants. Meanwhile, a sample of paper, which has been soaked with 15 minutes of time variant produces more residuals compared to other samples

Keywords
Silica, Rice Husk Ash, Thermal

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/94xKUEzumeRg

Corresponding Author
Bela Berli Yeni

Institutions
a)Program of Pascasarjana Biology, Universitas Indonesia, Jl Profesor Doktor Sudjono,
Depok 16424, Indonesia
*bela.lim440[at]gmail.com
b)Department of Biologi, Universitas Indonesia,
Jl Profesor Doktor Sudjono, Depok 16424, Indonesia

Abstract
Java long pepper is a plant has an aphrodisiac effect. Its extract contains cytosterol and piperine which capable of affecting the reproductive hormones in male Siamese catfish. The purpose of study to evaluate the effect of java long pepper extract on spermatozoa motility of mustika common carp. Java long pepper extract was injected intramuscularly in the first of week with doses of 0.9 ml kg, 1.8 ml kg and 3.6 ml of body weight, respectively. Ovaprim in a dose of 0.3 ml body weight was administered as a positive control, whereas 0.1 ml of sodium solution was applied as a negative one. The result was observed in the second of week. Based on the ANOVA test showed that java long pepper extract has a significant effect on spermatozoa motility of mustika common carp (P<0.05). Further, according to the Tukey test that the highest spermatozoa motility rate was yield from a dose of 1.8 ml of java long pepper extract kg by body weight 69.5%.

Keywords
Java long pepper extract; Spermatozoa motility; Mustika common carp

Topic
Biology

Link: https://ifory.id/abstract/xnTbvcgu6AjG

Corresponding Author
Dicky Rezky Munazat

Institutions
(a)Department of Physics, Universitas Indonesia, Depok 16424, Indonesia
*budhy.kurniawan[at]sci.ui.ac.id
(b)Research Center for Metallurgy and Materials, Indonesian Institute of Sciences (LIPI), Gedung 470, Puspiptek, South Tangerang 15314, Banten, Indonesia

Abstract
Polycrystalline La0.7Sr0.2Ba0.1Mn1-xNixO3 (x = 0.02 and 0.05) has been successfully synthesized by sol-gel method. This research aims to investigate the effects of low nickel substitution on the correlation between structure, microstructure, and electrical transport behavior. From Rietveld refinement result, crystal structure both samples were found to be Rhombohedral with R-3c (167) space group. Low nickel substitution at Mn-site shows that the Mn-O-Mn bond angle decreases and the Mn-O bond length increase which linked Jahn-Teller distortion, double exchange, core-shell model, and percolation model. Scanning electron microscope (SEM) result reveals that nickel substitution leads to smaller grain size. Temperature-dependent resistivity ρ(T) has been measured at 15-285 K with zero field cooling. The ρ(T) increases with decreasing grain size because of the enhancement of the grain boundary effect with the increase in the nickel content. The Curie temperature (TCMod) and the temperature of the metal-insulator transition (TM-I) moves to lower temperatures with increasing nickel substitution content. Percolation model can describe the electrical behavior of both samples based on electron-electron, electron-magnon, and electron-phonon scattering, and Kondo-like spin dependent scattering at low temperature and adiabatic small polaron hopping at high temperature.

Keywords
Nickel Substitution, Mix Valance Manganite, Percolation Model, Resistivity

Topic
Material Science

Link: https://ifory.id/abstract/xvdDfk8tEgPL

Corresponding Author
Rusdi Nur

Institutions
Politeknik Negeri Ujung Pandang

Abstract
Sustainable production as a global word, content important elements on all the fields as well as machining processes. Turning is one of the most fundamental and indispensable processes of metal removal in industry. Increasing pollution preventing initiatives globally and consumer focus on environmentally conscious products has put increased pressure on industries to minimize or eliminate the use of cutting fluids. The use of Near Dry Machining (NDM) in machining operation is one of the most effective strategies in this direction to achieve sustainable machining system. This study was purpose to determine the influence of NDM coolant system on surface roughness when turning of mild carbon steel, include power demand. A detailed comparison has been made with dry cutting to assess the process performance on the basis of surface roughness and power demand. The results indicate that providing reduction on surface roughness and power demand more effectively than dry cutting at high speed conditions, thereby to achieve sustainable machining system.

Keywords
Sustainable Turning, NDM, Surface Roughness

Topic
Mechanical Engineering

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

Corresponding Author
Daryanto, M.T. -

Institutions
1,3. Electrical Engineering Education Study Program, Faculty of Engineering, Jakarta State University, Jakarta, Indonesia.
2. Technology and Vocational Education Study Program, Faculty of Engineering, Jakarta State University, Jakarta, Indonesia.
4. Center for Education and Culture Policy Research, Board of Research and Development, Ministry
of Education and Culture, Jakarta, Indonesia

Abstract
The use of Information and Communication Technology (ICT) for school management is very helpful in providing services to students and other stakeholders. ICT as a technology can be useful if used to improve its performance. Whereas someone will use technology to assist in completing his work if he feels that the technology is easy to use. A persons perception of existing technology will encourage the use of this technology in its work. This study aims to examine the effect of perceptions of ease of use of ICTs on service quality in vocational high schools in West Java. The method used in this study is a causal survey. Sampling in this study used proportional random sampling technique with a total sample of 150 respondents. The research data were analyzed using path analysis with the Partial Least Square (PLS) approach. The results of this study indicate that the perception of ease of use of ICT affects the quality of service to stakeholders in vocational high schools in West Java.

Keywords
perception, stakeholders, service quality, ICT

Topic
Management Science

Link: https://ifory.id/abstract/jb7Dx8dCNntP

Corresponding Author
Ratna Dewi Wulaningsih

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

Abstract
Testing the validity and reliability of objective questions on PPEP (Perencanaan, Pengelolaan, dan Evaluasi Pembelajaran/Learning Planning, Management, and Evaluation) courses which is carried out at the Biology Education Program FMIPA UNJ demands thorough attention, considering the lecture material in this course is important to provide adequate knowledge for the students as prospective education graduate. Problem Based Learning Model is a cooperative learning model that focuses on student group work in the form of small groups, which consists of four to six people. Students in groups will work together in a positive way and become responsible independently. Data collection using pretest and post-test completed with documentation. The results of this study shows that there is an influence of the problem-based learning model on students skills in testing the validity and reliability of objective questions on PPEP courses.

Keywords
validity, reliability, objective question, problem-based learning model

Topic
Biology

Link: https://ifory.id/abstract/PqmCwW4LH7Gv

Corresponding Author
Edi Widodo

Institutions
Universitas Muhammadiyah Sidoarjo

Abstract
Transmission automatic or known as (CVT) is a transmission that makes us feel comfortable because we only need to pull the gas without moving the transmission because the transmission is automatic. Automatic motors not only make driving easier but also facilitate the maintenance of the transmission. However, among racing motorbike lovers, this automatic transmission type motor is lacking in power. So it needs to be modified to the CVT component to improve the performance of the machine. To improve this performance, we analyze pulley and standard roller manufacturers and primary pulleys with 3 kinds of pulley, namely standard angles of 14o, 13o, 12o and roller 11 gram variations to determine the comparison of peforma (horse power and torque). To find out the comparison of the test, we do the test using the Dyno test. From the test results, 13o pulley and 11 gram roller have increased significantly compared to standard 14o and 13 gram roller standard pulleys. This can be seen from the results of an increase in horse power and torque when using pulley 13o and 11gram roller can be obtained on the highest horse power (Hp) at 3246 Rpm rotation which is the highest 9.0 hp and torque (Nm) at the engine speed 2087 Rpm which is 22.16 Nm. While the standard pulley of the factory is 14o and the standard 13gram roller can be seen the highest horse power (Hp) at 3923 Rpm round, which is 7.8 Hp and the highest Torque (Nm) at 2972 Rpm engine speed which is 16.99 Nm. then from the results of this test analysis has increased horse power 1.2 hp and torque of 5.17 Nm.

Keywords
standard pulley; modified pulley variation; roller variation; dyno test

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/gKJhrHn9B64A

Corresponding Author
Muhamad Saepudin Wahab

Institutions
Metallurgy and Material, Indonesia University

Abstract
Dye plays a very important role in the Dye Sensitized Solar Cell (DSSC) application because the sunlight that comes in is captured and absorbed by dye. More light absorbed, the higher value of efficiency obtained. Therefore, dye plays a very vital role to increasing this efficiency value. For increasing the absorption of dye, this topic studied about effect of reduced graphene oxide (rGO) to DSSC Performance. its obtained through the hummers modified method which will be combined with dye in the ratio of wt% rGO-dye 0,1: 1; 0,3: 1; and 0,5: 1 respectively. Thickness Variation of rGO on the ITO transparent glass to enhance efficiency of DSSC also studied. The result show power conversion efficiency of the DSSC with the rGO-dye 0,1:1 (0,008%), rGO-dye 0,3:1 (0,019%), and rGO-dye 0,5:1 (0,0073%), which was higher than that of the DSSC without the rGO (0,0046%). ZnO nanorod as photoanode obtained by chemical bath deposition which is growth in temperatur 0 degree Celcius and Platina (Pt) as the counter electrode. SEM, UV-Vis and XRD were used to characterization of rGO and ZnO.

Keywords
DSSC,reduced graphene oxide, ZnO

Topic
Material Science

Link: https://ifory.id/abstract/NrLBXmynM2CD

Corresponding Author
IMAM BASORI

Institutions
Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia
*unimam_r_one[at]yahoo.com

Abstract
Steel has a very important role in the industrial application, especially for the manufacture of automotive components such as gears. In its application, gear undergoes the compressive and friction loads, so that in the manufacturing process, materials with high hardness and wear resistance are needed. One method to increase steel hardness is by quenching process. In this research, quenching process will be carried out on AISI 1045 steel using the salt water as the cooling media. The austenization process was conducted at a temperature of 850 ° C with the holding time of 15 and 30 minutes. The samples were then salt quenched with the salt concentration of 0, 10 and 23%. The results showed that the salt quenching process on AISI 1045 steel tended to change the combination of ferrite and pearlite phases to be martensite. This process also increases the hardness of AISI 1045 steel, in which the highest hardness value is found in the sample with 30 minutes austenization process and salt concentration of 23%. In contrast, this sample have also the lowest impact resistance value of 0.056 J / mm2.

Keywords
salt quenching; austenization; ferrit; pearlite; martensite

Topic
Material Engineering

Link: https://ifory.id/abstract/zBKR6ZbyfQDV

Corresponding Author
I Gusti Agus Maha Putra Sanjaya

Institutions
a) Animal Husbandry Department, Agriculture Faculty, Warmadewa University, Bali-Indonesia
b) Agrotechnology Department, Agriculture Faculty, Warmadewa University, Bali-Indonesia
* Email: iriantoketut[at]yahoo.co.id

Abstract
The aims of this study were to analyze and test several types of activated sludge to find out the safe and environmentally friendly fertilizer raw material standards, analyze the characteristics and number of activated sludge components that are potentially safe to use and find out fertilizer raw material standards and also test the response of plants witch use the several types of activated sludge in supporting the growth and plant yields that are safe for consumption. The method used is the potensial study using a comparative method. The amount of raw materials and types of fertilizer raw materials using survey methods and mathematical calculations. Result indicated that the process of wastewater treatment technology that uses waste technology is classified as good and were use standards operational with utilization concept. Wastewater in terms of quality and characteristics is considered safe and has a large potential to be used as raw material for fertilizer. Fertilizers sourced from the results of wastewater treatment respond to the fresh weight of leaves of Brassica juncea is higher if compared to Bio Fertilizer and Chemical Fertilizer at the same dosage.

Keywords
Active sludge, concentration, plant response

Topic
Biology

Link: https://ifory.id/abstract/3mJM4bBxAtNP

Corresponding Author
Umar Faruq

Institutions
a) Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok 16424, Indonesia
*budhy.kurniawan[at]sci.ui.ac.id

Abstract
The effect of sintering temperature on the structure and morphology of Ca0.95La0.02Bi0.03MnO3 was investigated by X-ray diffraction and Scanning Electron Microscopy. The sample was prepared by sol-gel method. Their homogeneity was confirmed using X-ray diffraction. Rietveld refinement of X-Ray diffraction results showed that the sample sintered at 1100 C for 12 h are single phase and have an orthorhombic structure with Pnma space group. While the samples were sintered at 900 C and 1000 C did not show a single phase due to another peak is found. For the lattice parameter, crystal volume increases with increasing sintering temperature. The largest crystal volume was reached at sintering temperature 1100 C which is equal to 208.535 Å. For the angle of the Mn-O-Mn bond, the sample was sintered at 1000 C has the largest value obtained 152.778 (deg) while at 1100 C is 152.702 (deg) and 900 C is 151.652 (deg). For the average Mn-O bond length shows relatively the same value for all sintering temperature. Scanning Electron Microscopy was used to study the morphology of the materials, grain size increases with increasing sintering temperature.

Keywords
CaMnO3, Sintering temperature, Sol-gel method, Lattice parameter

Topic
Material Science

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

Corresponding Author
Yusmaniar Yusmaniar

Institutions
 1Departement of Chemistry Faculty of Match and Science Universitas Negeri Jakarta, Jln Rawamangun Muka, Jakarta Timur 13220, Indonesia

Abstract
This study aims to determine the effect of Poly vinyl alcohol (PVA) and Soluble soybean polysaccharides (SSPS), and to characterize it (water resistance and biodegradation test). This research was done by blending (mixing) PVA, SSPS, acetic acid, and maleic anhydride. From the results of infrared spectrum analysis on plastic films showed peaks in the area 1000-1100 cm-1 which indicates the absorption of polysaccharides. This plastic has an optimum water resistance of in the ratio between 1:1 w/w (SSPS:PVA). Optimum biodegradation test results in the ratio of 1:1 w/w (SSPS:PVA). Based on the result of the research, it can be concluded that water resistance and biodegradation reach optimal on composition 1:1 w/w (SSPS:PVA).

Keywords
Soluble soybean polysaccharides (SSPS), poly vinyl alcohol (PVA/PVOH), biodegradable plastic

Topic
Environmental Engineering

Link: https://ifory.id/abstract/zRdg4jNJbZEn

Corresponding Author
Ni Luh Putu Eka Kartika Sari

Institutions
a,b,c,d) Faculty of Medicine and Health Sciences, Warmadewa University

Abstract
Type 2 diabetes mellitus (T2DM) is a common chronic disease and also a major worldwide public health problem. A wide variety of lifestyle factors play an important role in the development of T2DM, such as sedentary lifestyle, smoking, alcohol consumption, and stress. Psychological stress is being explored as a risk factor for chronic diseases, such as cardiovascular disease, arthritis and diabetes. Pathophysiological mechanisms that link stress with diabetes involve direct neuroendocrine effects, in which stress-associated hormones such as cortisol and adrenaline have regulatory effect on insulin release. Cortisol can cause glucose formation in peripheral tissues as well as in the liver. This condition causes increased blood glucose level in T2DM. The objective of this study was to assess the effectiveness of stress management by SOUL Prevention and Healing meditation to normalize blood glucose level in DMT2 patients. This study used a quasi experimental design; the study sample comprised 16 volunteers who made all the inclusion criteria. This study was conducted in Bali Royal Hospital (BROS) for 2 months. Fasting blood samples were collected three times (pre-treatment, 1 months post treatment, 2 months post treatment). Brain waves of each volunteer were recorded by using EEG before and after treatment. The study results showed that the average reduction of blood sugar level was 48.62 mg/dl (p value, p <0.05 (p = 0.001)). The EEG brain waves recording showed that all volunteers had achieved delta frequency. It is concluded that the brain wave delta frequency and normalized blood glucose level indicate a significant result of SOUL Prevention and Healing meditation.

Keywords
Meditation, T2DM, Blood glucose level

Topic
Biology

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

Corresponding Author
Rusmono Rus

Institutions
UNIVERSITAS NEGERI JAKARTA

Abstract
Technological advances have a big influence in the world of education. This study aims to determine the effect of mobile learning-based teaching materials on student learning outcomes in natural material. The experimental research method with a sample of 40 people in second grade elementary school students. The results obtained indicate an increase in student learning outcomes in the surrounding natural material after using teaching materials based on mobile learning. The conclusion of the study, there is a positive influence on the use of mobile learning-based teaching materials on the learning outcomes of the environment.

Keywords
teaching materials, mobile learning, alam sekitar.

Topic
Biology

Link: https://ifory.id/abstract/kB8T4pfqRdDV

Corresponding Author
Widyo Nugroho

Institutions
Sepuluh November Institute of Technology (ITS)

Abstract
The International Water Association states that water loss is an efficient indicator of the performance of a water company that has been implemented internationally. The volume of water loss expressed as Non Revenue Water at the global level shows a high number. Every year more than 32 billion m3 of treated water is lost due to leakage from the distribution network. There are four pillars in a leak management strategy include management of pressure, speed of repair, active leakage control, and asset management. These factors influence how leakage is managed and thus the volume and value of economic leakage - in a distribution network of water companies. The Current Annual Volume of Physical Losses tends to increase along with the increasing service area of the distribution network. The rate of increase can be inhibited by the right combined strategy between the four components in an effective leakage management strategy. In this study, the factors that influence Non Revenue Water in water distribution system in Malang Town are analyzed by focusing on the speed of recovery aspect. With the expansion of service areas, the distribution of locations has an effect on the speed of recovery. In the end, the expected results of this study are to find the significance of the relationship between the distribution pattern of the location of damage to the water distribution network and the speed of recovery. The data in this study include historical data on the location of damage to the pipeline for 8 years which includes spatial data and historical data on the recovery of each damage in the form of attribute data. The method used in this study is the spatial point process. Poisson distribution in the spatial point process is chosen as the leakage location distribution approach. The results of the analysis state that the distribution pattern of leakage is inhomogeneous poisson process. Based on the model obtained by the simulation result, it is found that the effectiveness of the repair need to consider covariate location variable such as demand junction and border of District Metered Area.

Keywords
Non Revenue Water(NRW), Spatial Point Process, Water Losses

Topic
Civil Engineering

Link: https://ifory.id/abstract/TFVUkQZaWxM4

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) Faculty of Mathematics, Natural Science and Information Technology Eduation, Universitas PGRI Semarang, Jl. Sidodadi-Timur No.24 Semarang, Central Java 50232, Indonesia
c) Lembaga Penelitian dan Pengabdian Kepada Masyarakat, Universitas PGRI Semarang, Jl. Lontar No.1 Semarang, Central Java 50232, Indonesia
d) School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen Sanda, Hyogo 669-1337 Japan

Abstract
We performed an investigation on (alpha)-Al(_{2})O(_{3}): Mn(^{3+}) material based on first-principles calculations without referring to any experimental parameter for the first time. In order to estimate the lattice relaxation effect due to Mn(^{3+}) substitution, we carried out a geometry optimization using Cambridge Serial Total Energy Package (CASTEP) code. Next, the molecular orbitals (MO) were calculated using the discrete variational-X(alpha) (DV-X(alpha)) method while the multiplet energies were calculated discrete variational multi-electron (DVME) method. Since, the multiplet energies are generally overestimated, here we also used the energy corrections to improve the accuracy. We thus compared our calculated results with the observed data reported by McClure et. al., (1962). The results shows that by considering both of the lattice relaxation effect and the energy corrections, the agreement between our calculated results and the observed data is improved.

Keywords
Mn3+, a-Al2O3, first-principles, DV-Xa, DVME

Topic
Material Science

Link: https://ifory.id/abstract/WXfJLqx83BA7

Corresponding Author
Teuku Budi Aulia

Institutions
University of Syiah Kuala, Banda Aceh 23111, Indonesia
*aulia[at]unsyiah.ac.id

Abstract
High demand for advanced infrastructure leads to the use of high strength concrete. Complex, futuristic and asymmetrical building construction could create dangerous torsional load and moment, mainly due to earthquake. Using large amount of cement makes high strength concrete not environmentally friendly. The use of natural aggregates continuously reduced its availability. Efforts to substitute cement and aggregate from abundant and environmentally friendly natural materials could be smart solution. This study aims to analyze the torsional capacity of high strength cantilever reinforced concrete beams having L configuration with a torque arm. Three hybrid beams were cast with substitution of 15% coal flyash (CFA), 15% palm oil blast furnace slag (POSFA) and 10% pozzolanic flyash (PFA) from cement weight, added with 10% pozzolanic sand as fine aggregate substitution and 40% palm oil blast furnace slag as coarse aggregate substitution. One beam without flyash and aggregate substitution (NPBHSC) was tested as comparison. All four beams added with iron ore as filler. The best torsion capacity achieved by PFA beam with maximum load (P) 2.83 ton, maximum torsion moment (M) 10.4 kNm, maximum torsion angle 0.0225 rad, ductility 3.941 and cylinder compressive strength 59.48 MPa, when compared to NPBHSC beam which produced P = 2.65 ton, M = 9.638 kNm, torsion angle 0.0069 rad, ductility 1.008 and compressive strength 44.40 MPa. POSFA beam followed then by CFA beam resulted in slightly smaller P and M, but generated greater compressive strength, maximum torsion angle and ductility than NPBHSC. It can be concluded that geopolymer flyash can increase compressive strength, torsion capacity and ductility of high strength reinforced concrete beams.

Keywords
Torsion Capacity, High Strength Reinforced Concrete Beam, Geopolymer Flyash, Aggregate Substitution, Iron Ores

Topic
Civil Engineering

Link: https://ifory.id/abstract/yGpXJr6gchWb

Corresponding Author
Dwi Atmanto

Institutions
Cosmetology Study Program
Faculty of Engineering
State University of Jakarta
Jalan Rawamangun Muka Jakarta Timur

Abstract
Rapid industrial development can lead to environmental pollution. bad air environment will cause damage to the skin such as dry skin. Indonesia has biological natural resources such as coconut trees and castor oil plants. Both oils can be used to make skin care due to the impact of heat by the environment. This study aims to determine the effectiveness of using VCO oil from coconut and castor oil in natural creams to treat dry skin. The method of this research is an experiment that is looking for the right comparison to make natural creams from each VCO oil and castor oil. The experiment was carried out on 10 dry skins of student volunteers. Research using randomized group only design is divided into two groups. Group A is the experimental unit for treatment and group B is a comparison group, subjects are selected by purposive sampling from a particular population. This study used an 8-experimental design of the initial test until the final test in both groups. The results showed that tcount > ttable is 2.441> 1.330 so Ho is rejected and HI is accepted at the 0.05 significance level. So, there are differences in the use of pure coconut oil cream (VCO) and castor oil cream to reduce the smoothness of the skin.

Keywords
Castor oil, VCO oil, Natural Cream, Dry skin, Environmental factors

Topic
Environmental Engineering

Link: https://ifory.id/abstract/9NgrfXQE73vp

Corresponding Author
Kinkin Y Subarsa Putri

Institutions
(1) Department of Business Administration, University of Indonesia, Depok, Indonesia
(2) Department of Economic, State University of Jakarta, Jakarta, Indonesia
(3) Departemet of Comunication, State University of Jakarta, Jakarta, Indonesia

Abstract
Abstract. New media helps all aspects of society well. The formulation of the problem of this research is how the influence of electronic word of mouth, brand trust, brand loyalty towards the new media literacy of the community. The concept is new media in electronic word of mouth, brand trust, brand loyalty and new media literacy. Method used quantitative with multivariate analysis. Research respondents are Youtube users on a product. Validity and reliability of the research is good, it can proceed to the next stage. Reflections are from the descriptive results of all the variables that have a positive dominant value. Multivariate in this study went positive. Alternative hypothesis of all independent variables on new media literacy has a positive effect. This means that this research is consistent with previous research toward positive influences. There is the influence of electronic word of mouth, brand trust, brand loyalty towards the publics new media literacy in using Youtube. Conclusion is positive. Suggestion is to use new media in subsequent research and reflect on the concept of research in technological development to make new contributions in the development of technology and the social side of society.

Keywords
electronic word of mouth, media literacy, new media.

Topic
Computer and Communication Engineering

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

Corresponding Author
Gerry Resmi Liyana

Institutions
a) Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
*gerryliyana[at]gmail.com
b) Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
*ahyuwono[at]gmail.com

Abstract
ZnO nanostructures have been attracting much interest of researchers due to their unique properties and wide potential for various applications. In this study, the effect of seeding temperature and growing time on the characteristics of ZnO nanorods were investigated. The seed solutions were first prepared at temperature of 0, 30, and 60℃ for 1 hour using zinc nitrate tetrahydrate and hexamethylenetetramine as precursors. The ZnO seed layers were then deposited onto ITO glass substrates by spin coating technique prior to the chemical bath deposition (CBD) growth at temperature of 90℃ for different times (3, 4, and 5 hours). The synthesized ZnO nanorods were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV–Vis spectrophotometry. The results showed that with the increase in seeding temperature from 0℃ to 60℃, the crystallite size decreased from 71.32 to 38.95 nm, while the band gap energy increased from 3.27 to 3.55 eV, respectively. While with increased of growing time during CBD, the crystallite size was adversely increased from 65.37 to 88.09 nm, and consequently the band gap energy was found to decrease from 3,55 to 3,52 eV.

Keywords
ZnO nanorods, ITO, chemical bath deposition, seeding temperature, growing time

Topic
Material Engineering

Link: https://ifory.id/abstract/nXJPv7agMWAc

Corresponding Author
Muhamad Yunus Abdullah

Institutions
INSTITUT TEKNOLOGI SEPULUH NOPEMBER

Abstract
Today the supply of fossil energy resources which is increasingly depleting will have a significant impact on every aspect of life in Indonesia. One attempt to overcome this problem by using the Organic Rankine Cycle (ORC) Cycle System. The types of refrigerants used in this study were R141 b, R123 and R245 fa using Aspen plus software simulation. This research focused on journal review and using aspen plus software simulation using the working fluid refrigerant R141b, R123, and R245fa on the ORC as a 1 kW scale electric energy generating machine. The results obtained from the simulation using aspen software plus Organic cycle Rankine Cycle (ORC) using a working fluid refrigerant R141b, R245fa, and R123 at a pressure of 3 bar to a pressure of 11 bar at a temperature of 95 degrees Celcius. The maximum efficiency produced is 8.65 %, 7.79 %, and 8.36 %. Turbine power produced 1005 watts, 896 watts and 770 watts From the simulation results used in the Organic Cycle Rankine Cycle R 245fa has the efficiency value that is best used as a 1 kW electric energy generating plant with an efficiency value of 8.65 %.

Keywords
Aspen Plus Software; Turbine; Evaporator; Condenser; Pump

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/At7hyuvdLnQR

Corresponding Author
Melati Ferianita FACHRUL

Institutions
Department of Environmental Engineering, Universitas Trisakti, Jakarta, Indonesia

Abstract
Constructed wetland is engineered, man-made ecosystems is one of the wastewater treatment systems to reduce water pollution by using plants. The purpose of this study to know the efficiency of Sub-Surface Flow constructed wetland with Vetiveria zizanioides in domestic wastewater treatment and to reveal the effect of aeration and detention time to reducing BOD concentrations in domestic wastewater. The research has been conducted in constructed wetland located in Srengseng Sawah Village of continue aerated reactor and without aeration as control reactor. Detention time (days) 2 and 3 was setup, then sample was taken for BOD concentration. The results indicated that constructed wetland with aeration and detention time 4 days had a higher performance to remove BOD up to 90% than without aeration and less than 4 days process. This results fulfill the requirement of the quality standards of the Decree of DKI Jakarta Governor No. 122 of 2005 and Decree of the Minister of Environment No. 112 of 2003

Keywords
Constructed Wetland, Domestic Wastewater, BOD, Vetiveria zizanioides

Topic
Environmental Engineering

Link: https://ifory.id/abstract/RfmV7hvTe36N

Corresponding Author
Mindit Eriyadi

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

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

Keywords
Street Lighting; Redesign; Particle Swarm Optimization

Topic
Electrical Engineering

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

Corresponding Author
Rizka Adhiswara

Institutions
Universitas Pendidikan Indonesia

Abstract
Long-term forecasting of electricity energy consumption has become one of the main fields in the electricity sector in each country. This study aims to compare the accuracy of the results of the method used in this study with research conducted by the government to estimate electricity consumption in Indonesia. Many methods can be used to estimate electrical energy consumption such as conventional methods (exponential smoothing, ARIMA, regression), fuzzy logic and artificial neural network algorithms. The method used in this study is the Back-Propagation Neural Network (BP-ANN) algorithm. The results of this research are data on estimates of electricity consumption in Indonesia for 2019-2023. This research is expected to prove the accuracy of the Artificial Neural Network (ANN) method to estimate electricity consumption in Indonesia.

Keywords
Electriciy energy consumption forecasting; Artificial Neural Network; Back-Propagation

Topic
Electrical Engineering

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