Jurnal Teknosains
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APLIKASI JARINGAN SARAF TIRUAN DAN PARTICLE SWARM OPTIMIZATION UNTUK PERAMALAN INDEKS HARGA SAHAM BURSA EFEK INDONESIA
No full textJakarta Composite Index (JCI) is the main stock index in Indonesia Stock Exchange, which indicates the movement of the performance of all stocks listed. The data of stock price index often experience rapid fluctuations in a short time, so it is needed to carry out an analysis to help investor making the right investment decisions. Forecasting JCI is one of the activities that can be done because it helps to predict the value of the stock price in accordance with the past patterns, so it can be a consideration to make a decision. In this research, there are two forecasting models created to predict JCI, which are Artificial Neural Network (ANN) model with (1) Backpropagation algorithm (BP) and (2) Backpropagation algorithm model combined with Particle Swarm Optimization algorithm (PSO). The development of both models is done from the stage of the training process to obtain optimal weights on each network layer, followed by a stage of the testing process to determine whether the models are valid or not based on the tracking signals that are generated. ANN model is used because it is known to have the ability to process data that is nonlinear such as stock price indices and PSO is used to help ANN to gain weight with a fast computing time and tend to provide optimal results. Forecast results generated from both models are compared based on the error of computation time and forecast error. ANN model with BP algorithm generates computation time of training process for 4,9927 seconds with MSE of training and testing process is respectively 0,0031 and 0,0131, and MAPE of forecast results is 2,55%. ANN model with BP algorithm combined with PSO generates computation time of training process for 4,3867 seconds with MSE of training and testing process is respectively 0,0030 and 0,0062, and MAPE of forecast result is 1,88%. Based on these results, it can be concluded that ANN model with BP algorithm combined with PSO provides a more optimal result than ANN model with BP algorithm
FUNDAMENTA LS OF BIOMECHANIC BIOMEDICAL ENGINERING
No full textStudi tentang biomechanics telah berkembang pesat dari awalnya hanya aplikasi studi mekanika teknik yang sederhana kemudian meluas dengan pelibatan berbagai bidang studi. Dalam bidang biomechanics buku ini sangat membantu mahasiswa ataupun peneliti untuk memahami dasar-dasar mekanika dan dinamika tubuh manusia, yang menjadi bidang kajian penting dalam studi rekayasa biomedik. Buku ini memberikan pengetahuan yang memadai tentang konsep statika, gerak, dinamika, pemodelan, dan aplikasinya dikaitkan dengan bagian-bagian tubuh dan gerakan manusia, hal-hal yang sangat penting yang seharusnya diketahui dalam pengembangan biomechanics, tetapi sebelumnya sangat jarang untuk didapatkan pustakanya
ADVANCES IN BIOMATERIALS SCIENCE AND BIOMEDICAL APPLICATIONS
No full text“Advances in Biomaterials Science and Biomedical Applications” merupakan buku teks yang disusun oleh beberapa penulis dari berbagai disiplin ilmu dari berbagai negara. Setiap bab yang ditulis merupakan hasil kajian, penelitian atau pengalaman pribadi penulis. Para pembaca dapat memperoleh gambaran umum untuk mengetahui potensi biomaterial di masa-masa mendatang. Pembaca juga akan mendapatkan gambaran bagaimana proses fabrikasi material implan berbasis organ manusia dilakukan dengan teknologi cetak 3 dimensi (3D printing). Buku ini terbagi menjadi 21 bab. Setiap bab diulas secara detail agar mudah dipahami
ROLE OF REDUCING CELL LEAKAGE IN CELL CULTURE USING LARGE PORE SIZE PERMEABLE MEMBRANE
No full textPermeable membranes are widely used in many in vitro studies using cell culture. Some cell leakage are often occurs when using permeable membrane with large pore size. Unfortunately the use of permeable membrane with smaller pore size in permeability studies faces some difficulties due to its small pore size and pore density. Recent study provides the protocol in using permeable membrane with large pore size with smaller cell leakage. Vero cell line (CCL-81, ATCC) was used and culture on polyester permeable membrane with 3 µm pore size. Visualization using inverted microscope was used to analized the cell leakage on the permeable membrane. Parallel plate flow chamber was used to analized the permeability performance of the Vero cell cultured on the permeable membrane. The result showed that the current technique is significant in reducing cell leakage of the cell cultured on large pore size of permeable membrane. The same results were found in using polyester and polycarbonate permeable membrane
OPTIMASI FORMULASI SABUN MANDI CAIR EKSTRAK ETANOL RIMPANG JAHE MERAH (Zingiber officinale Rosc. var rubrum) DENGAN METODE SIMPLEX LATTICE DESIGN
No full textPrevention of diseases caused by bacteria can be carried out with the use of antibacterial soap. The use of antibacterial soaps derived from natural one is to plant a red ginger (Zingiber officinale Rosc. var rubrum) which proved to have antibacterial activity. Therefore, preparations to make it more acceptable liquid soap containing antibacterial compounds 6-shogaol, gingerol, and zingiberen from red ginger plant. Simplex Lattice Design is a method which to find a good formula of dosage from. The study aims to determine the optimum formulation liquid soap ethanolic extract of red ginger rhizome using the method of Simplex Lattice Design. Simplex Lattice Design Methods used to optimize the formulation of liquid soap with five formulas with variations in the amount of olive oil and potassium hydroxide (KOH), FI (0%:100%), FII (25%:75%), FIII (50%:50%), FIV (75%:25%), FV (100%:0%). Evaluation of liquid soap ethanol extract of red ginger rhizome (Zingiber officinale Rosc. var rubrum) include an examination viscosity, pH, and free alkali. Physical stability was analized to find higher total response value (R total) as parameter of the optimum formula by Simplex Lattice Design Methods with Design Expert software version 8.0.7.1. Optimum formula liquid soap ethanolic extract of red ginger rhizome with the proportion of variation base olive oil 98,1%(27,167 g) and potassium hydroxide (KOH) 1,9%(3,99 g). Data obtained physical characteristics test compared with prediction value using Design Expert software version 8.0.7.1. The result showed that physical properties of liquid soap formula optimum didn’t different significantly for easy response
APPLYING ALPHA-BETA ALGORITHM IN A CHESS ENGINE
No full textMinimax Algorithm, is a solution to reduce the burden on hardware in chess engine. However, a more in-depth method is needed to further increase the search algorithm. One of those solutions is called Alpha-Beta Pruning algorithm. The idea is to eliminate the unnecessary nodes in the search tree.
EVALUASI KOMPLIKASI PLATE EXPOSURE PASCA RESEKSI AMELOBL ASTOMA MANDIBULA DENGAN REKONSTRUKSI PELAT TITANIUM DI RSUP DR. SARDJITO YOGYAKARTA
No full textResection of the jaw is a primary option of treatment in mandibular ameloblastoma with bone damage. Mandibular resection will cause mandibular stability disturbance due toloss of some part of the bone. Instability of the mandible can cause aesthetic, physiological, and psychological malfunctioning. To restore its stability, installment of mandibular reconstruction plate on the remaining mandibular by using screws. However, it is not uncommon that plate exposure occurs following mandibular reconstruction, caused by inaccurate adaptation of the plates to the mandibular bone. A 3D stereolithography modelcan help provide the best assesment on the bone defect, plan the making of the more easily pre-operative curved plates and provide more accurate faster surgery time. Objective: To evaluate plate exposure after mandibular resection with titanium reconstruction plates in Dr. SardjitoHospital. Case report: A case was reported on mandibular reconstruction after resection of ameloblastoma with titanium plate performed in Dr. Sardjito Hospital that experienced intra-oral plate exposure and oro-cutaneous fistula on the left mandible. The clinical evaluation showed the curved titanium plate did not adapt well with the remaining mandibular bone; therefore, the titanium plate was removed without replacing it with a new plate. Inappropriate adaptationof curved titanium plate is one of the main causes of plate exposure. The use of a 3D stereolithography model is very helpful for the success of mandibular reconstruction
UJI SITOKSISITAS CAMPURAN RESIN AKRILIK DENGAN KITOSAN SEBAGAI BAHAN GIGI TIRUAN ANTI JAMUR
No full textDenture acrylic resin contain monomer residue that can cause allergic reactions and inflammation in the mouth. Chitosan has advantage biocompatible and antifungal. The purpose of this study was to examine toxicity acrylic resin blends with chitosan as denture antifungal in fibroblast cell culture. This study uses chitosan concentration 0.5%, 1%, 2% and 4% of 2.5 ml were blends with acrylic resin. Fibroblast cell cellular responses were assessed using MTT assay. Data at the cell viability analyzes used Anova one path (p <0.05). The results showed the greatest average adsorbansi fibroblast cell in blends acrylic resin was chitosan concentration of 0.5% (0.434 ± 0.119) with 99.810% cell viability, and the smallest average chitosan concentration of 4% (0.385 ± 0.023) and 88.523% cell viability. Anova test showed there were differences the effect of varying concentrations of chitosan significantly to adsorbansi and cell viability (p <0.05). The results of post hoc test showed a concentration of 4% was significantly different than other concentration. Conclusion, acrylic resin blends with chitosan at a concentration of 0.5%, 1%, 2% were non-toxic, being mild toxic concentration of 4%