Indonesia Conference Directory

Corresponding Author
Azwar Mudzakkir Ridwan

Institutions
(a) Electrical Engieering Departement UIN Sunan Gunung Djati Bandung Jalan A.H Nasution No 105, Bandung 40614, Indonesia
*azwarmudzakkirridwan[at]uinsgd.ac.id
(b)School of Energy, Bandung Institute of Technology
Jalan Ganesha 10, Bandung 40132, Indonesia

Abstract
HAPS (High Altitude Platform Station) is an alternative technology of communication system that utilizes terrestrial and satellite systems. HAPS technology is in stratosphere layer with a height of 17-22 km above the earths surface. HAPS has some advantages, which are wide range area, communication ability on line of sight (LOS), and low propagation delay. In this paper we present the comparison between single HAPS system and two HAPS diversity technique. From simulation result, it is evident that using two HAPS as a diversity technique gives better performance than the single HAPS system, that is two HAPS diversity technique requires less SNR than the single HAPS system, typically 3 dB less of SNR.

Keywords
HAPS, LTE, Space diversity, HAPS diversty.

Topic
Electrical Engineering

Link: https://ifory.id/abstract/t2hm3Y9FZKnA

Corresponding Author
Irwan Alnarus Kautsar

Institutions
Universitas Muhammadiyah Sidoarjo

Abstract
This paper presents the development of a supportive tool for Computer Security related Classroom while taking advantage of the User-centered Design Canvas. The proposed supportive tool was developed to support both lecturer and students to manage the submission and scoring system on the Computer Security class related. The User-centered design itself was widely used as an approach to software development in order to achieve better design on the User Interface and the User Experience. Adopting Bussiness Model Canvas, the User-centered Design Canvas was introduced as an acceleration tool for rapid prototyping and ensure the effectiveness and efficient manner for the sake of user satisfaction. As the results from the questionnaire, more than 85% of users express the benefits of the current development supportive tool. Also from the Log Metric Analysis, users have completed a designated task in few minutes with minimum repetition. This indicates that the developed supportive tool is easy to use and shows the effectiveness of the User-Centered Design Canvas for rapid prototyping.

Keywords
user-centered design, rapid prototyping, supportive tool

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/xQCwmkYjDEb2

Corresponding Author
Anak Agung Gede Indraningrat

Institutions
a. Faculty of Medicine and Health Science, University of Warmadewa,Jln Terompong 24,Denpasar-Bali, Indonesia 80235.
* anak.indraningrat[at]gmail.com

b. General Hospital Sanjiwani, Gianyar-Bali, Indonesia

Abstract
Antibiotic resistance is currently an emerging global threat that is triggered by misused and overused of antibiotics, which led to higher mortality and morbidity rate. Information of antibiotic resistance iscrucial to determine the ideal treatment for patients. Since these data is rather scarce in Bali, we performed antibiotic susceptibility profile of different clinical bacterial isolates in the General Hospital Sanjiwani Gianyar Bali based on retrospective data in 2018. The data included type of tested antibiotics, name of clinical bacterial isolates, sex of patient and antibiotic resistance profile. Among 65 clinical bacterial isolates, high diversity of bacterial pathogen was found and grouped into 22 species, which Escherichia coli, Klebsiela pneumoniae and Staphylococcus aureus were the three predominant isolates identified. Exposure against 28 different antibiotics showed majority of bacterial isolates were resistant against baxtrim, aztreonam, ciprofloxacin, but susceptibility towards meropenem, amikacin and cefoperazone-sulbactam were observed. Routine surveillance to determine antibiotic resistance profile are of important and recommended to generate a local antibiogram as guideline to overcome pathogenic infections.

Keywords
Antibiotic resistance, susceptibility, clinical bacteria

Topic
Biology

Link: https://ifory.id/abstract/uRXfDJFP8KkH

Corresponding Author
Nurul Fatia Jannah

Institutions
a) Student of Defense Industry Study Program, Faculty of Defense Technology, Indonesia Defense University
*nurul.jannah[at]tp.idu.ac.id
b) Teacher of Defense Industry Study Program, Faculty of Defense Technology, Indonesia Defense University

Abstract
ENGINEERING COMPOSITE MATERIALS AS RADAR WAVE ABSORBERS - The latest technological developments make a fighter aircraft capable of entering enemy territory without being detected thanks to material engineering carried out with a combination of two or more materials with different characters in each constituent component to obtain a new element with characteristics as desired. This research was conducted using the analytic hierarchy process (AHP) method that compares the character of materials to be used on stealth aircraft. Data is obtained through literature studies, and secondary data use. The composite material was chosen as the material used in stealth fighter aircraft, as the anti-radar fighter aircraft, considering the nature of its properties which makes the aircraft structure stronger and lighter and meets the STWR standard (strength to weight ratio) as a comparison between strength and mass the material itself.

Keywords
Material Engineering, Composite, Radar Absorber, AHP

Topic
Material Engineering

Link: https://ifory.id/abstract/y7P62EHwXFMC

Corresponding Author
Gede Yohanes Arygunartha, S.Pd., M.Pd FIS Anes

Institutions
Warmadewa University
Jalan Terompong 24 Tanjung Bungkak, Denpasar,

Abstract
This study aims to improve student learning outcomes and scientific performance of physics. This research is a classroom action research. Subject from this study were students of class XI odd school year 2018/2019 as many as 19 male students. This research implemented in two cycles with each cycle stage consisting of planning, action, observation / evaluation, and reflection. The results of this study indicate that 1) there is an increase in students scientific performance. In the first cycle the average value of performance the scientific achievement of students is 77.37 with a fairly high category, while at the second cycle increased to 87.90 with a very high category, 2) an increase student physics learning outcomes. In the first cycle the average value of physics learning outcomes is achieved students are 73.00 while in cycle II it increases to 77.50. Research This class action is categorized as successful because it has reached the level of completeness amounting to 94.7%

Keywords
Learning model of Contextual Teaching and Learning, Learning Outcomes, Scientific Performance.

Topic
Physics

Link: https://ifory.id/abstract/QGJYk28WaZCU

Corresponding Author
Eki Ahmad Zaki Hamidi

Institutions
(a) Electrical Engineering Department UIN Sunan Gunung Djati Bandung
Jalan AH. Nasution 105 Bandung 40614 Indonesia
*ekiahmadzaki[at]uinsgd.ac.id

Abstract
Heart rate monitoring system based on Internet of Things is a device to monitor the heart rates through the website. The prototype designed using a pulse heart sensor that is attached to the finger, the Wifi ESP 8266 module read the sensors and displayed in tjhe LCD and the data obtained can be sent to the website. The data is sent to the databases to find out the record that can be accessed any time using smartphone by opening a web that is already available. So, the users can find when data recorded from the results of testing that has been done. Testing was done by taking 10 samples with a comparison between prototype and oxymetry as a control, and the results are not too significant.

Keywords
Pulse Heart Sensor, ESP8266 Module, Heart Rate Monitoring

Topic
Electrical Engineering

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

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
Willy Cahya Nugraha

Institutions
(a,b) Research Unit for Clean Technology,
Indonesian Institute of Sciences
Jl. Cisitu Sangkuriang, Bandung 40135
Telp/Fax : (022) 2503051/(022) 2503240
*E-mail : will003[at]lipi.go.id

Abstract
Nitrate is one of pollutants which is found in water and dangerous for human health. Spectrophotometer UV Vis method using cadmium reduction is a simple method and cheap but it has a difficult technique and can be used for nitrate analysis. The method was validate according with analytical parameters. The result of this study were linear range 0.069- 5 mg.L- 1, limit detection and quantitation were 0.025 mg.L-1 and 0.069 mg.L-1, respectively. repeatibility of the method 2.19 % rsd and accuracy with 102.7 % recovery. All of parameters have a good performance and can be used for nitrate analysis for water sample.

Keywords
water, nitrate, spektofotometer UV Visible, validate

Topic
Chemistry

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

Corresponding Author
Soeprijanto Soeprijanto

Institutions
a) Faculty of Engineering, Universitas Negeri Jakarta, Jakarta, Indonesia
*prijanto.unj[at]gmail.com
b)yusupyfy[at]gmail.com
c)ermimedia[at]yahoo.com

Abstract
This study aims to determine the level of feasibility of practical facilities and equipment in the Private Vocational Middle School Electrical Engineering Expertise Program in the East Jakarta environment. The research method used is the method of achievement (qualitative and quantitative) using the program gap evaluation model (Discrepancy Evaluation Model). The problem raised in this research is the extent to which the feasibility of space and equipment in the practice of electric power installation in private Vocational Schools in the East Jakarta region is seen from the Standards of Facilities and Infrastructure of Indonesian Vocational High School Permendikbud Number 34 of 2018. The research samples were 4 schools, determination Sample schools are conducted by proportional random sampling. The research was conducted in the 2017/2018 school year. The results showed that: (1) All (100%, N = 4) sample schools had a facility to install electricity in the form of instructional space and practice space in conditions worthy. (2) all (100%, N = 4) sample schools did not have a Basic Electrical Engineering laboratory. (3) When viewed from the standards of the Vocational Middle School practice equipment available in the basic installation practice room for Electric Power, in all (100%, N = 4) sample schools were inadequate. Conclusion This study shows that private Vocational High Schools in East Jakarta already have practice principles. Electric power is in the form of instructor rooms and practicum rooms, but it is not supported by adequate practical equipment. The implication of this study is that private vocational schools in the East Jakarta environment need to meet the additional power plant installation equipment according to standard facilities according to Minister of Education and Culture number 34 of 2018.

Keywords
practice tools, electric power installation, private vocational high school

Topic
Electrical Engineering

Link: https://ifory.id/abstract/bNd8UzDVyrHj

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
Riska Dewi Wijayanti

Institutions
a) Student of Civil Engineering Department, Institut Teknologi Sepuluh Nopember (ITS)
Sukolilo, Surabaya, 60111, Indonesia
* riska.dw[at]gmail.com
b) Civil Engineering Department, Institut Teknologi Sepuluh Nopember (ITS) Sukolilo, Surabaya, 60111, Indonesia
c) Technology Management Department, Institut Teknologi Sepuluh Nopember (ITS) Cokroaminoto 12 A, Surabaya, Indonesia

Abstract
The availability of decent drinking water is one indicator of the welfare of the Indonesian people as stated in the universal access target of 100% drinking water service in 2019. The Central Government through the Provincial Water Supply Working Unit assists with WSS Infrastructure Development Programs as a stimulant for Local Governments in meeting drinking water service targets. However, the limitations of the APBN budget have resulted in the need to prioritize the selection of the programs. The program selection method was prepared by identifying the existing conditions and evaluating the functioning of assets in each district. The priority sequence of the program was carried out by the Multi-Criteria Analysis (MCA) approach. Determination of priority criteria based on Strategic Policy for WSS Development and WSS Evaluation Guidelines. The priority sequence is the result of a calculation between the weighting of district criteria that carried out by the Provincial Working Unit, and the WSS unit by the Provincial Working Unit and district stakeholders with Borda analysis method. The application of this method resulted in a sequence of priority programs which could be a recommendation for the Provincial Water Working Unit to determine the selection of WSS Infrastructure Development Programs.

Keywords
Water Supply System; WSS infrastructure; Priority; Multi Criteria Analysis

Topic
Civil Engineering

Link: https://ifory.id/abstract/2npzJhCu7KjQ

Corresponding Author
Efri Sandi

Institutions
Department of Electrical Engineering, Universitas Negeri Jakarta
Jalan Rawamangun Muka Jakarta Timur, Indonesia 13220

Abstract
In this paper a new design of substrate integrated waveguide was developed to improve the gain performance of microstrip antennas for 5G antenna applications. The antenna and substrate integrated waveguide was designed at freq 28 GHz millimeter-wave band. The design of substrate integrated waveguide was developed by design an H-slot structure without gap in the substrate layer to provide better matching impedance and reduce loss of surface wave microstrip antenna. This study was conducted with a research and development approach through the calculation of the H-slot structure on substrate integrated waveguide and simulated by using antenna design software simulation. The numerical result shows that new design of H-slot structure without gap model was improved antenna return loss more than 8 dB and bandwidth more than 1 GHz . This result has shown a significant improvement compared to antenna design without using substrate integrated waveguide.

Keywords
H-Slot Design; Substrate Integrated Waveguide; Gain; 5G Antenna

Topic
Electronics Engineering

Link: https://ifory.id/abstract/Gt7pgnqmyhxc

Corresponding Author
Erlin Susanti

Institutions
Department of Civil Engineering, Faculty of
Civil, Environmental, and Geo Engineering,
Sepuluh Nopember Institute of Technology
(ITS) Surabaya
Indonesia

Abstract
Reservoir is a water resource facility that has a function as a storage and water provider. The abundant water in the rainy season is accommodated, stored and used appropriately throughout the year. The fact that is happening now as time goes by is that many reservoirs in Indonesia have decreased function and performance. One of them occurs in the Bajulmati Reservoir located in Banyuwangi and Situbondo districts, East Java. The decrease was due to the planning of the reservoir that was not in accordance with the current conditions. This study aims to analyze the Operating Pattern of Bajulmati Reservoir so that the reservoir is expected to provide optimal performance in utilization for irrigation, raw water and Micro Hydro Power Plants. This research was conducted by analyzing data for the availability and utilization of Bajulmati Reservoir water, stretching the discharge of reservoir inflow in the future for 50 years, forming a model with Dynamic Programming and simulation. The first simulation was carried out according to the operation of the current reservoir, which is prioritized for irrigation (factor kT = 100% with differences in how to calculate irrigation water requirements), irrigation water is passed through a turbine (PLTMH). In the second simulation, the reservoir was operated with the fulfillment of irrigation and raw water, a factor of kT> 70% and the Micro Hydro Power was optimized considering the availability of water in the reservoir. The simulation results show the operation of the reservoir in producing electricity on average per year if the turbine must be fully operational and if a turbine with a 20% maximum power already operate with a percentage of the fulfillment of irrigation and raw water (factor kT). From the analysis of income (without taking into account the cost and assuming the provision of irrigation water and raw water are performed simultaneously) are known to be the highest income and lowest income.

Keywords
Reservoir, optimization, dynamic programming

Topic
Civil Engineering

Link: https://ifory.id/abstract/4kGcF9yYpPdT

Corresponding Author
Moch Sukardjo

Institutions
Universitas Negeri Jakarta
Jln. Rawamangun Muka Raya, Jakarta Timur, 13220

Abstract
This research aimed to discover how the concept of measurement is applied to transistor circuits, especially bias transistor circuit, collector feedback circuit, small signal amplifier circuit and class A amplifier circuit. The methodology used was experiment by comparing the results of pre-test and post-test. Data will be analyzed using t test. Population in this study were students of the electrical engineering education study program at Engineering Faculty, Jakarta State University. The sample was randomly registered students whose electronic courses selected from 2 classes. The results showed that the master learning of students had more advanced, especially in describing and analyzing the transistor circuits calculation.

Keywords
measurement, transistor, transistor amplifier

Topic
Electronics Engineering

Link: https://ifory.id/abstract/tjphdcrF3AUu

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
Ari Widayanti

Institutions
(a*) Civil Engineering, Institut Teknologi Sepuluh Nopember Surabaya
ariwidayanti1973[at]gmail.com

Abstract
This paper presented the characterization and performance of Asphalt Concrete contain Reclaimed Asphalt Pavement (RAP) and Coal ash as the waste material. The accumulation of RAP and coal ash require the maximal utilization as the road pavement. In terms of higher utilization of its performance, it is required to analyze the material characteristic and the material properties. The aim of this study is to obtained the performance of Asphalt Concrete contain RAP and filler based on coal ash. Filler variations consist of fly ash, bottom ash and geopolymer powder. Method used X-Ray Fluorescence, Scanning Electron Microscopy and Marshall Test. The results showed bulk density of 1.8 gr/cc, stability of 2,771.1 kg, stability residue of 47.1%, flow of 5.3 mm, VIM (Voids in Mix) of 12.0%, VMA (Voids in Mineral Aggregate) of 19.3%, VFB (Voids Filled Bitumen) of 47.1%. The better performance of asphalt concrete mixture is RAP, original asphalt, aggregate and filler bottom ash.

Keywords
Reclaimed Asphalt Pavement, coal ash, asphalt concrete

Topic
Civil Engineering

Link: https://ifory.id/abstract/xREuN2WZJbtG

Corresponding Author
Ruswan Dallyono

Institutions
Universitas Pendidikan Indonesia

Abstract
A mathematical approach to linguistics provides an array of insights for quantitative description on the ways language works. This area of investigation is still underexplored, but it is actually significant for the development of mathematical models to enhance linguists- understanding on linguistic structure. This study aims to present a mathematical analysis of how the English preposition on works under the framework of Trajector (TR) and Landmark (LM) relations (Tyler & Evans, 2003). Data were corpora taken from 10 dissertations written by American student writers. To sort the data, Ant Conc 3.4.1.0 was used to parse clauses or sentences based on the TR-LM configurations. Based on the TR-LM configurations, a mathematical model was developed to discover how these variables are quantitatively related to the number of senses produced by using a geometric representation of TR and LM. This study indicates that the relation between TRs and LMs, on the one hand, and the potential sum of senses, on the other, follows the integral function of ∑ C = ∫ TR d(LM), which means that the total number of senses of C equals the integral of TR with respect to LM. This mathematical modeling confirms the TR-LM hypothesis that every physical object has a unique sense established by their TR-LM configuration as spawned by Lakoff (1987).

Keywords
Keywords: construal, sense, preposition, trajector, landmark

Topic
Mathematics

Link: https://ifory.id/abstract/eJxjQW8a4kEK

Corresponding Author
Asri Lestarini

Institutions
(a) Faculty of Medicine and Health Sciences, Warmadewa University
Jalan Terompong no 24 Denpasar, 80235, Indonesia
*asrilestarini[at]gmail.com
(b) Tabanan Hospital, Bali, Indonesia
(c) Sanjiwani Hospital, Bali, Indonesia
(d) Faculty of Medicine, Gadjah Mada University, Indonesia

Abstract
Diabetic nephropathy is one of the complications caused by metabolic disease which could lead to renal failure. A marker that can potentially be used for early detection of diabetic nephropathy is urinary albumin-creatinine ratio (uACR). This study aimed to measure correlation between uACR and the stage of renal failure. Crosssectional study was conducted in March until August 2018. Participants were clinically examined, and blood and urine were taken. the stages of renal failure was determined by estimated Glomerular Filtration Rate (eGFR). Data was statistically analyzed by One way ANOVA and Pearson correlation. Of 107 participants, 79 participants were eligible for inclusion in data analysis. The participants were grouped into 5 stages of renal failure. Urinary albumin-creatinine ratios in stage 1,2,3,4,5 were 204.9, 125.9, 474.9, 604.7 and 2895.6 respectively. Posthoc analysis showed significant differences in uACR between stage 5 and stage 1,2,3 respectively (p<0.05). Significant correlations were found in uACR with SC (r 0.354, p 0.001), BUN (r 0.244, p 0.032) and eGFR (r -0.345, p 0.02) respectively. Urinary albumin-creatinine ratio had positive correlation with serum creatinine and blood urea nitrogen, while had a negative correlation with estimated glomerullar filtration rate

Keywords
renal failure, urinary albumin-creatinine ratio

Topic
Biology

Link: https://ifory.id/abstract/pjY3Pc6KVBQn

Corresponding Author
Budi Lukman Hakim

Institutions
Sekolah Tinggi Teknologi Garut

Abstract
Jacket pile is a corrosion protection system that is applied to ASTM 252 steel piles in the tidal and splash zone area of the Jetty. In this system the vessel is leaning on the breasting dolphin (BD). There has been damage to 9 new pile jackets installed and operated for several days in February 2018 on BD. damage occurs in the front position of the pneumatic fender direction of the vessel leaning. analysis is carried out using observation, inspection and simulation methods. the results of the analysis of the causes of damage to the jacket pile is due to vertical collisions and loads from the pneumatic fender. the visual simulation it can be predicted that when the ship rests near BD, the backrest will be held by a pneumatic fender, so that the floating fender will pound and press the pile jacket with mashing energy of 13.88 t.m, both in a shock, swing perpendicular and vertical to the pile BD. To prevent the recurrence of similar cases, it is recommended to use a BD Guard to protect the pile and jacket pile of BD from direct collisions and friction from pneumatic fenders and barges.

Keywords
Breasting Dolphin, Corrosion Protection, Failure Analysis, Jacket Pile, Jetty

Topic
Material Engineering

Link: https://ifory.id/abstract/cdwAKjpu26xZ

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
Wisnu Uriawan

Institutions
Teknik Informatika, Fakultas Sains dan Teknologi
Universitas Islam Negeri Sunan Gunung Djati Bandung
Jl. A. H. Nasution 105, Bandung 40614 Indonesia

Abstract
Universities cannot be separated from the existence of assets owned, therefore an information system is needed that functions as a tool in the asset management process. Most asset management in the private university still using Spreadsheet besides that the management of its assets is also not centralized. These problems can be solved by creating a web-based asset management information system. The purpose of this study is to design and build an asset management information system at the Private University. The method used is straight line where this method is used for problems in calculating the depreciation of assets and knowing the useful life of the asset. This system can help private university administrative staff in managing assets and calculating asset value.

Keywords
Asset Management, Information System, Straight Line, Private University

Topic
Computer Science

Link: https://ifory.id/abstract/pfUBWVt6cR2Q

Corresponding Author
Nurhabibah Nurhabibah

Institutions
Program Studi Farmasi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Garut, Jl. Raya Samarang No.52A, Garut, Indonesia
*nurhabibah[at]uniga.ac.id

Abstract
Fast Dissolving Film (FDF) have ability to releasing active pharmaceutical rapidly in oral mucosal with increasing bioavaibility of active pharmaceutical due to first passing hepatic metabolism. The aim of the research was formulated and evaluated FDF salbutamol sulfat with HPMC E15 polymer use solvent casting method. FDF salbutamol sulfat with variation of concentration HPMC E15 polymer was resulted film who flexible and semi transparent. The results of the evaluation of thickness, weight variation, folding endurance, surface pH, moisture loss, moisture uptake and disintegration time of film for all formulation was comply with a requested, except weight variation of F4, disintegration time of F1, F2, F3 and F4.

Keywords
Fast Disintegrating Film, Formulation, Evaluation, Salbutamol Sulphate, HPMC E15.

Topic
Pharmacology

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

Corresponding Author
ALI AKBAR

Institutions
(1,2,3) Mechanical Engineering, Universitas Muhammadiyah Sidoarjo, Indonesia

Abstract
Previous research stated that salt water cooling media has higher hardness value after going through the heat treatment process compared to freshwater cooling media. From this explanation, a study was conducted on the effect of using acid and alkaline solutions in the quenching process against the hardness of ST37 steel. This study uses vinegar water cooling media and soapy water. In this study several steps were carried out, namely: hardening on ST37 steel with a heating temperature of 700ºC with a holding time of 15 minutes, direct quenching with acidic cooling media (vinegar: 2.4 pH) and alkaline solution (soap water: 9.3 pH ) with a 15 minute holding time. After the heat treatment process and direct quenching on ST37 steel, Rockwell hardness was tested. From the test results, the use of acid and base solution cooling media in the quenching process has an effect on the hardness of ST37 steel, the best hardness value is an alkaline solution compared to an acid solution, alkaline solution has a hard value of 66.73 HRC, while acid solution has a hardness value of 64.31 HRC .

Keywords
ST37 steel, acid solution, alkaline solution, quenching, hardness.

Topic
Mechanical Engineering

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

Corresponding Author
Syifa Fauziyah

Institutions
UNIVERSITAS NEGERI JAKARTA

Abstract
The aim of this research is to (1) make a Mobile Media Learning on Acid and Base and to determine the quality of the media produced, (2) determine the feasibility of the media used in learning process. The subjects of this research were students of SMAN 54 Jakarta, SMAN 42 Jakarta, and 7 chemistry teachers. The research was conducted from January to May 2018. The method used in this research is Research and Development (R&D). The steps performed in this research are: (1) needs analysis, (2) developing mobile learning, (3) validation test of mobile learning media, (4) media testing by students and small scale of teachers, (5) media trials by students and teachers on a large scale. The results obtained from expert validation tests, small class trials, large class trials, and effectiveness of the media, it can be concluded that the mobile media learning developed in this research is good enough to use in the learning process. The n-gain value obtained from the effectiveness test is 0.76 which can be categorized as high effectiveness, based on the Paired t-test the Tcount value is 28.048. The paired t-test value is Tcount>Ttable (2.03), the value of significance obtained from the paired t-test is 0.000 which is less than the level of significance (α) = 0,05, therefore H0 is rejected so it can be concluded that there is a significant difference between pre-test score and post-test score. That difference means that there is improvement in students average score after using the mobile media learning.

Keywords
Mobile Learning, Acid and Bases

Topic
Chemistry

Link: https://ifory.id/abstract/Y4KcdgQWBVjx

Corresponding Author
Syifa Fauziyah

Institutions
UNIVERSITAS NEGERI JAKARTA

Abstract
This study aims to develop innovative learning media that is mobile. Learning and knowing the quality of media are produced and see the feasibility of media to be used in learning on buffer solutions. This research was conducted at SMAN 107 Jakarta and SMAN 42 Jakarta starting in January 2018 until May 2018. The research method used is Research and Development which includes four stages, namely: (1) needs analysis, (2) development of mobile learning media, (3) Feasibility and trial test. Media that generates an android-based smartphone (smartphone) application called ChemBuff is 167MB compatible on Android devices up to v.7.1 Nougat with features such as material, video and educational features about the solution buffer. Based on the feasibility test It can be concluded that the mobile learning media that has been developed is feasible and practical for use in learning material buffer solutions. The test solution is that there is a very significant difference between the pre-test and post-test results.

Keywords
Mobile Learning, Buffer Solution

Topic
Chemistry

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

Corresponding Author
Cahyadi Setiawan

Institutions
Universitas Negeri Jakarta, Faculty of Social Science, Program Study of Geographic Education. Jakarta, Indonesia.
cahyadi-setiawan[at]unj.ac.id

Abstract
After hundreds of years experiencing a dormant period, Mount Sinabung erupted again in August 2010 to the last recorded in June 2018. Within eight years, significant land cover changes were seen in the area around Mount Sinabung. This study aims to analyze changes in affected areas using satellite imagery. The spatial analysis method is used to determine changes in various land cover. High-resolution images before the 2010 eruption and the latest recording images of 2019 are used as analytical material. The analysis shows that the affected area is in east-southeast and south-southeast directions of the peak of Mount Sinabung. In the east-southeast direction, the eruption material reaches 3.5 km and 4 km in the south-southeast with an area more than eleven thousand hectares. Some villages such as Bekerah, Simacem, and Suka Meriah have even been lost covered by material from the eruption of Mount Sinabung. The area is generally covered by pyroclastic materials in the form of ash, sand, lapilli, and bombs. Most of the areas affected by the eruption are plantation areas, then forest areas and settlements areas. Sinabung Eruption in recent years has had a very significant impact on various aspects, one of which is land cover.

Keywords
Sinabung Volcano; Land Cover Change; Satellite Imagery

Topic
Environmental Engineering

Link: https://ifory.id/abstract/kHfZdBqT3xF7

Corresponding Author
Isfi Zahara

Institutions
Department of Biology, Faculty of Mathematics and Natural Sciences
Universitas Negeri Jakarta, Indonesia

Abstract
Simpor (Dillenia sp.) is a plant of the Dilleniaceae family. Simpor (Dillenia sp.) has bioactive compound which is flavonoids that act as antioxidant. The purpose of this study was to measure the antioxidant capacity of the 96% etahnolic simpor leaf extract. CRD (Complete Randomized Design) was applied with 3x5 factors. Extraction of leaf samples done by maceration methode using ethanol 96% with variations in maceration time 24 and 48 hours and series consentration of (10%, 15%, and 20%). The antioxidant capacity assay of simpor leaf series concentration (10, 50, 100, 150, dan 200) ppm using the immersion method of the DPPH (1,1-Diphenyl-2picryl Hidrazil) measure absorption at a wavelength ot 517 nm and compared with the powder of ascorbic acid. The result showed that the ethanol extract has flavonoid qualitatively and quantitatively. Furthermore it also has radical scavenging ability against DPPH (1,1-Diphenyl-2picryl Hidrazil).

Keywords
antioxidant capacity, DPPH, leaves simpor, (Dillenia sp.)

Topic
Biology

Link: https://ifory.id/abstract/J6xKBPmrWg4w

Corresponding Author
Putu Indah Budi Apsari

Institutions
faculty of medicine and health sciences, warmadewa University

Abstract
Cognitive, motoric and language aspect of HIV children is an important issue that affect developmental milestone and quality of life. The effect of HIV infection on cognitive function remains unclear. This study aimed to assess correlation of cognitive scores with CD4 among HIV child in Paediatric polyclinic Sanglah Hospital, Bali. This cross sectional study recruited 68 HIV child age 0-36 months old as participants. Cognitive score was assessed using CAT/CLAMS scores, HIV status was obtained from medical record. The result showed average of CD4 among subject was 29.85 cells/mm3, there was positive correlation between CAT scores with CD4 count (r = 0.33, p = 0.006) and also between CLAMS scores with CD4 count (r = 0.307, p = 0.01). It can be concluded CD4 count correlated with cognitive scores on HIV child.

Keywords
HIV child, cognitive score, CAT/CLAMS

Topic
Biology

Link: https://ifory.id/abstract/JnqYe6My24hf

Corresponding Author
Rositayanti Hadisoebroto

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

Abstract
In general, chicken slaughterhouses have capacity of slaughtering more than 40.000 chickens per day so it generates a high wastewater. One of appropriate treatments is Granular Aerobic Sludge in Sequencing Batch Reactor (GAS-SBR) since wastewater from chicken slaughterhouse has high BOD and COD in fluctuation. The purpose of this research is to analyze the reactor system ability to decrease parameters of BOD, COD, TSS, and ammonia on wastewater. In this research, the concentration variations were 6406.4 mg/L (100%) as initial concentration, 4804,8 mg/L (75%) and 2303,2 mg/L (50%). With 4 hour aeration time, the highest BOD removal with 100% load is 56.25% and an effluent is 1400 mg/L; COD is 75% removed with effluent of 768 mg/L at 50% load; TSS is 36.73% removed with effluent 1.79 mg/L at 100% load; while for Ammonia is 67.91% with 1.11 mg/L at 75% load. The parameters of TSS and ammonia have meet the quality standard of Environmental Ministry Decree no.5, 2014 for slaughterhouses wastewater, while BOD and COD parameters are steel exceeding the standards. The GAS-SBR could remove BOD and TSS parameters from highest concentration load, while ammonia and COD parameters could remove in influent concentration load diluted.

Keywords
chicken slaughterhouse wastewater, granular aerobic sludge, sequencing batch reactor, concentration load

Topic
Environmental Engineering

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

Corresponding Author
Yoga Pradana

Institutions
(a) Students of Civil Engineering Department, Faculty of Civil, Enviromental & Geo Engineering, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo,
Surabaya 60111, Indonesia
* dana.yogapradana[at]gmail.com
(b) Civil Engineering Department, Faculty of Civil, Enviromental & Geo Engineering, Institut Teknologi Sepuluh Nopember (ITS), Sukolilo,
Surabaya 60111, Indonesia

Abstract
This study aims to determine factors influencing performance assessment of road infrastructure and design proposals for non-toll road performance assessment models. As of now, there has been a performance assessment of road infrastructure, but not yet implemented consistently. It also still needs some improvement by using variables and other variable indicators that have not been used, especially for roads that have been built, operated and maintained. The design of the road infrastructure performance assessment model is done by selecting variable indicators based on literature reviews and expert interviews. Then filtering out variables using relative important index (RII) and weighting variables using pairwise comparisons. As a model validation, the project data for several national road segments in East Java were made as case studies, thus the results were represented in the form of web spiders for an easier interpretation. The model simulation results show that roads in Indonesia are already good in technical and economical aspects, but still need improvement on social, environmental and management aspects. This model can be used as one of the basic considerations for improvements in enhancement of road performance in Indonesia.

Keywords
Road Performance Assessment; Triple Bottom Line; Sustainable Development

Topic
Civil Engineering

Link: https://ifory.id/abstract/pLg2PdwuNWXc