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Yuni Wibawanti
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STRING (Satuan Tulisan Riset dan Inovasi Teknologi)
Published by Universitas Indraprasta PGRI
ISSN : 25279661     EISSN : 25492837     DOI : http://dx.doi.org/10.30998/string.v4i3.6197
Core Subject : Science, Education,
Computer Science & IT Mathematics
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) focuses on the publication of the results of scientific research related to the science and technology. STRING publishes scholarly articles in Science and Technology Focus and Scope Covering: 1. Computing and Informatics 2. Industrial Engineering 3. Electrical Engineering 3. Mechanical Engineering 4. Applied Mathematical 5. Physics (Classical and modern) 6. Mathematics and Science
Arjuna Subject : Ilmu Komputer (semua kategori) - Teori Komputasi dan Matematika
Articles 373 Documents
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Implementasi Sistem Aplikasi dan Metode Pembelajaran Paikem Gembrot Berjas (Berbasis Jaringan Sosial) Rayung Wulan; Eddy Saputra; Nur Ali
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 2, No 1 (2017)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (140.161 KB) | DOI: 10.30998/string.v2i1.1718

Abstract

The process of learning in the educational unit organized an interactive, aspirational, fun, challenging, motivating the students to actively participate and provide enough space to for innovation, creativity, and independence according talents, interests, and physical development, as well as psychological protégé. " making educators are increasingly challenged to manage the class, with the help of props teaching approach (approach to teaching) that is shared is used along with a lot of specific methods and with different teaching media that accompanied the arrangement of the classroom and the seating of students such that the learning process becomes active , innovative, creative, effective, and fun. Thus, the students were interested and easily absorb the knowledge and skills that are taught. The development of information and communication technology currently allows PAIKEM fat BER JAS term suits means-based social networking (Internet). At the present time has been so much infrastructure, Information and Communication Technology which none.And community (including students) are already familiar with the technology and knowledge needed extra to use the technology. With the help of social networks based tutorial educators make it easier to demonstrate directly to students.
Implementasi Data Mining Menggunakan Model SVM untuk Prediksi Kepuasan Pengunjung Taman Tabebuya Agus Darmawan; Nunu Kustian; Wanti Rahayu
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 2, No 3 (2018)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (787.719 KB) | DOI: 10.30998/string.v2i3.2439

Abstract

Park is an area built in hard and soft materials supporting each other and deliberately designed and created by people as an outdoor or indoor refreshment place. The Tabebuya Park in Jagakarsa, South Jakarta is a tourist attraction flocked by visitors on regular days and holidays. The place is very beautiful and can give a sensation different to the one in our daily activities. One of the ways to improve visitor’s satisfaction during their visit is by improving the park’s service quality. This research aims to predict the satisfaction of Tabebuya Park visitors by applying SVM (Support Vector Machine) algorithm method in which the experiments in the model are evaluated and validated using the Confusion Matrix and AUC (Area Under the Curve) with ROC (Receiver Operating Characteristic). From the results of the evaluation and validation, it can be concluded the average accuracy and performance of algorithm SVM is 86.00% with AUC value of 0.947.
Uji Mekanik Film Chitosan-PVA-Antosianin Beras Merah Fita Widiyatun
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 3, No 2 (2018)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.353 KB) | DOI: 10.30998/string.v3i2.2836

Abstract

Researches on film-making, especially on edible films, degradable films, etc. have been often conducted in Indonesia. The research is part of research on the production of films to be used as milk drinks indicators. The aim of the research is to produce a film from Chitosan, PVA (Polyvinyl Alcohol) and Anthocyanin from red rice. The film will be then tested mechanically. Mechanical tests used include tensile strength and elongation testing. The method applied to measure tensile strength and elongation is ASTM D882. The test results show the tensile strength value of 109.62 kgf / cm2 and the elongation value of 30.71%.
Aplikasi Media Sosialisasi Quality Control Circle dan Idea Proposal Guidance Ambar Tri Hapsari
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 4, No 1 (2019)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (466.932 KB) | DOI: 10.30998/string.v4i1.3769

Abstract

Gugus Kendali Mutu atau Quality Control Circle merupakan sekelompok tim kerja yang secara sukarela bekerja membahas permasalahan yang terjadi di perusahaan yang melibatkan karyawan. PT. Astra Komponen Indonesia adalah perusahaan yang bergerak di bidang manufaktur otomotif khususnya dalam injeksi plastik dan pengecatan dan merupakan salah satu perusahaan yang mempunyai tim GKM dengan tujuan mengidentifikasi dan menganalisis proses-prosese terkait Quality Control Circle (QCC) dan Idea Proposal Guidance (IPG) dengan merancang sistem aplikasi android QCC dan IPG agar dapat meningkatkan minat dan kesadaran karyawan dengan menggunakan metode grounded research. Hasil dari penelitian ini adalah aplikasi android QCC dan IPG mempermudah karyawan dalam mengenal dan mempelajari dasar-dasar melakukan kegiatan QCC dan IPG dengan cara yang lebih menarik serta menjadi media sosialisasi Komite QCC kepada karyawan
Prediksi Kandungan Pati Pepaya IPB9 Selama Penyimpanan dengan Spektroskopinir Nur Arifiya
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 1, No 3 (2017)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (302.801 KB) | DOI: 10.30998/string.v1i3.1254

Abstract

The parameters of ripe papaya quality consisting of starch content, total soluble solid and water content must be measured by conductinga time-consuming and destructivelychemical analysis. NIR spectroscopy isa non-destructive, accurate, fast methodthat can substitute the such chemical analysis. This study aims to predict starch content, total soluble solid, and water content using NIR spectroscopy. 60 pieces ofpapaya of IPB 9 varietyat the part of top, middle, and bottom was measured with 3 replications. Starch content can be well predicted by NIR spectroscopy with pre-treatment of combination between msc and dg1, as indicated by the model generated by the R, SEC, SEP, CV, and RPD of 0.90, 0.17% 0.16%, 10.95%, and 2.15 respectively. Total soluble solid can bewell predicted by NIR spectroscopy with pre-treatment msc R, SEC, SEP, CV, and RPD, as indicated by 0.90, 0.124%, 0123%, 4.85%, and 2.27 respectively. Similarly, the water content can be well predicted by NIR spectroscopy with pre-treatment dg1 R, SEC, SEP, CV, and RPD, as indicated by 0.84, 0.03%,0.04%, 0.43%, and 1.85 respectively
Deteksi Cacat Plate Insulator Menggunakan Backpropagation Neural Network Agung Ferdinan Sandy
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 2, No 2 (2017)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (649.498 KB) | DOI: 10.30998/string.v2i2.2109

Abstract

Visual Inspection Plate Insulator Check is a critical step of quality control to ensure materials used are pass quality standard. The problem of manual material inspection can not detect whether the materials used for production are fine (OK) or not good (NG). Because of the failure in the inspection, there will be material and manpower loss due to rejection. In addition, it may make more problems if this defect product (NG) is delivered to customer. Then, it will jeropardize the company credibility. The problem of inspection failure can happen because of human factor such as tired, inaccurate, low-skill operator inspection with visual check. Therefore in this study, the researcher will develop a visual inspection technique of material checking with imaging  processing backpropagation neural network. Using image processing technique, the differences between OK materials and NG material will be investigated from the both images. The product images will be captured in production line and the comparison will be observed with the OK product. It is expected, this inspection will be more accurate and does not depend on human factors. Finally, the technique can be developed further into automatic visual inspection by material checking, e.g. a kind of Plastic.
Rancang Bangun Portable Weather Station Berbasis Jaringan Sensor Nirkabel Menggunakan Koneksi VPN Aldiram Pritalaksa; Muhammad Abdul Hadi; Muhammad Hidayattullah
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 4, No 1 (2019)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1069.719 KB) | DOI: 10.30998/string.v4i1.3412

Abstract

In Law No. 31 of 2009 concerning Meteorology, Climatology and Geophysics and Government Regulation No. 11 of 2016 concerning Meteorology, Climatology and Geophysics Services related to BMKG, government institutions, and aid provider institutions Better as routine or as early. Problems related to the challenges in providing quality services and service information about weather and related interests do not only occur in Indonesia, but also in other countries. This is due to limited resources needed by this country. This problem was then carried out by BMKG to find alternative solutions to improve service information and complexity. The alternative that can be done is by partnering with the private sector or community. This study answers the questions and needs stated above, namely by making a prototype. Portable devices for easy use BMKG can use easy and simple. Thus many people and the private sector can use the prototype and related information and can be provided easily and simply. The technique used in taking measurement parameters is not expensive and the climate uses sensors installed in the NodeMCU v3 microcontroller. 5 weather and climate measurement parameters are used, namely air temperature & humidity, air pressure, wind speed, sunlight intensity and rainfall. The use of solar panels and dry batteries functioned as a power supply from this prototype design. The measurement results from the sensor by the microcontroller, then sent every 1 minute to the Raspberry Pi available in the operating room via a LAN connection and then recorded by history data. Then the data from the Raspberry is sent to the Web DB & Server Server every 1 hour via a VPN internet connection. Users can use weather information from the measurement results by accessing the Web Server via a VPN internet connection using a username & password that was previously registered. Keywords: Portable, Sensor, Microcontroller, Wireless, VPN
Analisis Rancangan Antarmuka Aplikasi Sistem Manajemen Properti Pada PT.XYZ Alusyanti Primawati
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 1, No 2 (2016)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (538.287 KB) | DOI: 10.30998/string.v1i2.1040

Abstract

PT.XYZ merupakan perusahaan yang menyewakan propertinya untuk mendukung usaha perdagangan. Perusahaan PT. XYZ yang bergerak di bidang manejemen properti merupakan salah satu perusahaan yang sudah mengecap hasil dari penggunaan sistem yang terkomputerisasi. Akan tetap isi stem tersebut belum berkembang dengan menggunakan aplikasi yang terintegrasi sehingga memudahkan untuk membuat laporan akhir bulan ataupun tahunan. Oleh sebab itu maka ditemukan rumusan masalah yaitu bagaimana merancang aplikasi untuk mendukung sistem manajemen properti PT.XYZ. Metode yang digunakan adalah grounded research. Hasilnya adalah rancangan antarmuka yang didokumentasikan dalam Lembar Kerja Tampilan (LKT) serta Jaringan Semantik Tampilan (JST) dari aplikasi Sistem Manajemen Properti PT. XYZ melalui analisis perancangan dengan pendekatan orientasi objek menggunakan UML (Unified Modeling Language).Kata Kunci: LKT, Jaringan Semantik Tampilan, Sistem Manajemen Properti.
Analisis Kelayakan Investasi Pembelian Mesin Filter Press untuk Pengurangan Limbah Sludge Muhammad Fidiandri Putra; Ridwan Usman; Rimsa Rusmiland
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 2, No 2 (2017)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (789.628 KB) | DOI: 10.30998/string.v2i2.2100

Abstract

PT. Mustika Ratu, Tbk , established since 1981, is anIndonesian manufacturer of cosmetic products and traditional herbal medicines. Total Production in 2016 amounted to 26,330,695 units. In the production process, the company washes the production machine after completion of the process, during which the water as much as 17-34 m3 from the washing is daily discharged to the Wastewater Treatment Plant (WWTP). In a chemical vessel process or water purification process, the normal pH (6 to 9) can be made by adding alum and lime. This lime cleansing process produces a sludge or sludge precipitation. So far, the process of drying sludge still uses method of Drying Bed which dothe drying using sand, coral and fiber. The weakness of this method is it relies solely on the heat of the sun and the drying process takes a longer time during the rainy season. It is therefore necessary to think of purchasing a press filter machine to speed up the drying time and reduce the amount of sludge volume. Sludge waste volume monthly generated is as many as 8 tonon average, with the cost of removal of + Rp. 6,000,000. - if accumulated for 1 (one) year, it becomes Rp. 8,400,000. -. The research methods used are Payback Period Method, Net Present Value and Profitability Index Methods. The results of his research show that with Investment Value of the Purchase of Filter Press Machine of Rp. 170,000,000. - interest of 13% / year, present value of Rp. 93.600.000, a year – the company obtainsa payback period for 22 months (1.83 years), the value of NPV of Rp. 897,593,492. - and the value of Profitability Index (PI) of 6.3. So, it is concluded that the purchase of this machine is feasible.
Knowledge Management System pada Biro Administrasi Akademik Akademi Pariwista Nusantara Yudi Akbar
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 3, No 1 (2018)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (603.865 KB) | DOI: 10.30998/string.v3i1.2734

Abstract

Knowledge Management System (KMS) aims to improve the quality of human resources in an organization by improving communication among employees and to increase skill by transferring knowledge. Knowledge Management System (KMS) is one of many ways to foster a culture of knowledge sharing among individuals and organizations. In this research, the researcher tries to develop a model of knowledge management system suitable for existing condition at the Academic Administration Bureau of Nusantara Tourism Academy. The method used in this research is SSM model framework, while the knowledge is formed using SECI model. The system is designed by using Unified Modeling Language (UML) method. The functional system is tested using using FGD method with success rate of 90% and software quality is tested using MCcall's method with success rate of 87.75%. The result of this research is the Knowledge Management System prototype that can be a solution to share knowledge because it can properly record the employees’ knowledge and experience and can support the employees’ performance at Academic Administration Bureau of Nusantara Tourism Academy.

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