Center for Scientific Publication
Not a member yet
4029 research outputs found
Sort by
Copper Recovery of E-Waste Disposal (SIMCARD) by Using Electro-Generated Chlorine
Get PDFOne method for dissolving Cu from e-waste is to use electro-leaching. The waste used is Simcard and NaCl as electrolytes. Simcard contains copper metal and several other valuable metals such as silver (Ag), gold (Au) and palladium (Pa). The electro-leaching process is carried out in an electrolytic cell reactor where chlorine gas will be produced from the electrolysis process, then chlorine gas will extract the copper contained in the Simcard. This research was conducted by varying the electrode potential (voltage)/electric current (amperes), salt concentration and time. From this research, Simcard contains copper (Cu) by 40.53% and can be separated by electro-leaching method in a stirred acrylic reactor with the best results under operating conditions; a temperature of 30⁰ C, a pressure of 1 atm, a concentration of 10% salt solution, a potential difference of 10 Volts, a leaching time of 60 minutes, and a stirring speed of 600 rpm resulted in a Simcard metal alloy yield of 98.59%
User Story Extraction from Online News with FeatureBased and Maximum Entropy Method for Software Requirements Elicitation
Get PDFSoftware requirements query is the frst stage in software requirements engineering. Elicitation is the process of identifying software requirements from various sources such as interviews with resource persons, questionnaires, document analysis, etc. The user story is easy to adapt according to changing system requirements. The user story is a semi-structured language because the compilation of user stories must follow the syntax as a standard for writing features in agile software development methods. In addition, user story also easily understood by end-users who do not have an information technology background because they contain descriptions of system requirements in natural language. In making user stories, there are three aspects, namely the who aspect (actor), what aspect (activity), and the why aspect (reason). This study proposes the extraction of user stories consisting of who and what aspects of online news sites using feature extraction and maximum entropy as a classifcation method. The systems analyst can use the actual information related to the lessons obtained in the online news to get the required software requirements. The expected result of the extraction method in this research is to produce user stories relevant to the software requirements to assist systems analysts in generating requirements. This proposed method shows that the average precision and recall are 98.21% and 95.16% for the who aspect; 87,14% and 87,50% for what aspects; 81.21% and 78.60% for user stories. Thus, this result suggests that the proposed method generates user stories relevant to functional software
Analisis of Digital Information Media for Education in the Purwodadi Botanic Garden Using Analytical Hierarchy Process
Get PDFPurwodadi Botanical Garden is an ex-situ plant conservation institution. According to Presidential Regulation No. 93 of 2011 the Botanical Gardens have the duties of conservation, research, education, environmental services. Wisata Flora is an educational package conducted by Purwodadi Botanical Garden, the activity depends on the Wisata flora tour guide and the information boards in the garden. The availability of tour guides is still limited, and the information boards supporting Wisata Flora are also limited. This was obtained from interviews with visitors who use the Purwodadi Botanical Gardens education service. Therefore, we need a breakthrough in the way of delivering information to support flora tourism activities by utilizing digital technology. Digitalization is an environmentally friendly alternative compared to through the addition of information in physical form. Some of the technologies that exist today can be used as an alternative delivery of information to visitors independently, namely Quick Response (QR) Codes, RadioFrequency Identification (RFID), and Location Based Service (LBS). Of the three alternatives required a priority of application in accordance with the needs and management capabilities of Purwodadi Botanical Gardens. The research will be conducted using the quesioner and interview method with the management of Purwodadi Botanical Gardens and analyzed using the Analytical Hierarchy Process method. The results of the analysis are expected to be valuable input for the management of Purwodadi Botanical Gardens
Assessment of Coastline Changes Along Lagos West Mole
Get PDFAssessment of coastline changes is crucial to coastal development and management. The Lagos coast is still prone to sediment trap and erosion to date despite the construction of the three moles to solve siltation challenges; moreover, their rates and distributions are yet to be adequately evaluated. This study examines changes along the Lagos West Mole and the possible degree of distributions along the coast between 1984 and 2018 for six epochs. Acquired Landsat imageries were processed to delineate water boundary using Modified NDWI and extract the respective coastlines from the classified waterbodies. Coastline changes were quantified using Digital Shoreline Analysis System (DSAS); the Relative Shannon Entropy (RSE) model was used to measure the degree of concentrations of accretions and/or erosions. Results revealed more profound coastal accretions than erosions; whereas RSE values portrayed dispersed accretions more than erosions. Hence, the outcomes can aid stakeholders’ informed decisions concerning coastal protection and management
Modeling Portfolio Based on Linear Programming for Bank Business Development Project Plan
Get PDFThe bank’s business processes target business plans for the next year. Existing conditions, the business plan is based on the growth asset portfolio every year, so that the purchase of productive assets awaits issuers’ offers. This condition will cause a portfolio not to be measured and the inaccuracy of portfolio selection. Asset Liability Management (ALM) is the management of the structure of assets and liabilities to achieve profit. Banking books and trading books are bank portfolios to earn income. In selecting each portfolio, it contains liquidity risk, market risk and, credit risk. The level of profit is reflected in returns, while returns and risks are a trade-off so that calculations require mathematical and simulation models. Each bank needs an overview of the composition of productive assets, as short-term, medium-term and, long-term assets must be measured risk and target achievement. Linear programming method will allocate productive assets as the bank’s leading source of income, to achieve optimization of profit on the risks received. The problem with this research is that there are 830 variables as banking assets and 19 constraints as indicators of risk. In the seventh iteration of mathematical models, return 1,803 Trillyun from 11 banking book assets
Pengaruh Inflasi terhadap Strategi Optimal Investasi dan Konsumsi dengan Model Stokastik
Get PDFThe aim of this study is to investigate an optimal investment-consumption strategy under inflation rate with interest rate is described by Cox-Ingersol-Ross (CIR) model and volatility of the stock price is defined by Heston’s volatility model. A dynamic programming principle is used to obtain a Hamilton Jacobi Bellman (HJB) equation for the value function and choose a power utility function as utility function. The explicit solution of optimal investment and consumption are acquired with using separate variable and approach variable technique. The parameter’s values are approached by Euler-Maruyama method and Ordinary Least Square (OLS) method. Assumed that the portfolio of the investor contains a risk-free asset and a risk asset. Monthly historical data of TLK stock is used as risk asset and monthly historical data of BI 7-Day (Reverse) Repo Rate (BI7DRR) is used as risk-free asset, we obtain that the proportion of investment in stock is directly proportional to return of stock and the inflation rate does not have an impact on proportion investment in the stock. Meanwhile the optimal consumption of wealth is directly proportional to investor’s wealth and inversely proportional with inflation rate, which is the investor should consume less money of his wealth when the inflation rate increases
Aplikasi Metode Proses Hirarki Analitik dan Pemrograman Integer 0-1 Dalam Menentukan Komposisi Pemain Sepak Bola pada Football Manager 2019
Get PDFFootball has became a favorite sport of the world community. Every supporter of a football team would want their team to win the competition they participated in. Formation, strategy, and composition of teams are factors that influence the team's victory in a match. These three factors are the responsibility of a football coach in concocting his team in winning. This paper will discuss the application of the Analytical Hierarchy Process and the Integer 0-1 Program to assist football coaches in composing the composition of football players in a match. The AHP is used in this case to calculate the priority weights of each soccer player criteria while the Integer 0-1 Program is used to get eleven players to be deployed in a match. The results of both methods are simulated using the game Football Manager 2019 with team Manchester United in the English Premier League. Based on simulations conducted during the two season matches, Manchester United was able to finish in a fairly stable ranking in the English Premier League standings for two seasons
The Correlation Between Crystal Phase and Acidity in Nickel Doped Zinc Fluoride Solid
Get PDFNickel-doped zinc fluoride (Zn1‑xNixF2) with x= 0; 0.025; 0.050; 0.075; 0.100 and 0.150 were synthesized from zinc acetate as precursors. Solid materials were prepared by the fluorolytic sol gel method. The resulting solid materials were characterized by XRD and FTIR. The XRD characterization of the samples showed that there were characteristic peaks of zinc fluoride, zinc oxide and zinc hydrogen fluoride. The IR characterization spectrum showed the presence of Zn-F, Zn-O and -OH bonds in the samples. Pyridine adsorbed FTIR technique explains that the material has Lewis and Brønsted acidity. The acidity site in the solid were influenced by the Zn-O and Ni-O bonds in the catalyst.
Analisis Tarif Penggunaan Bike-Sharing Berdasarkan Ability-to-Pay dan Willingness-to-Pay di Kampus Institut Teknologi Kalimantan
Get PDFITK needs to provide a facility that restricts private mode that operates on campus. Bike-sharing encourages greener mobility in the campus area. This study aims to get a model of bike-sharing users, with the market being the student who lives surrounding the campus area. The method uses both conventional and electric bikes' ability-to-pay and willingness-to-pay of students toward bike-sharing. The results show that the student's highest potency of the bike-sharing user is 82%, and the lowest is 44%. The highest potency of the electric bike for bike-sharing is 81%, and the lowest potency is 31%. The result also indicates that the students tend to use bike-sharing and consider tariffs rather than payment methods for conventional and electric bikes. The ability-to-pay and willingness-to-pay indicate the students are a choice raider. The value of ability-to-pay shows it is higher than willingness-to-pay towards the bike-sharing facility
ANALYSIS OF MOTORCYCLE TRAFFIC ACCIDENT BASED ON THE RIDERS’ CHARACTERISTICS IN KUPANG, EAST NUSA TENGGARA
Get PDFAwareness about driving safety is still lacking among motorcycle users. As the provincial capital of East Nusa Tenggara (NTT), Kupang city accounts for the largest number of accidents in NTT with 70% of the total accidents involving motorcycles. It is important to measure the extent to which riding characteristics affects and causes road accidents since humans as the riders are the main factor in traffic accidents. A questionnaire was distributed to the motorcyclists. The data collected from 212 respondents was analysed with the multivariate logistic regression method. The analysis result states that the motorcycle mileage and the motorbike ownership hold the most influence on the incidence of motorcycle road accidents, where the further the motorcycle riders travel, the higher the probability of them to get involved in a road accident. Meanwhile the more units of motorcycle owned, the lower the probability of them to get involved in a road accident