JST (Jurnal Sains Terapan)
Not a member yet
97 research outputs found
Sort by
Aplikasi Asam Humat Hasil Isolasi Tanah Gambut Kalimantan sebagai Adsorben Zat Warna Naphtol Blue Black dan Indigosol Blue: Studi Perbandingan Model Kinetika dan Isoterm Adsorpsi
Get PDFA comparative study of kinetic and isotherm adsorption models of naphtol blue black (NBB) and indigosol blue (IB) dyes adsorption onto humic acid (HA) isolated from Kalimantan peat soils has been carried out. Adsorption of NBB and IB in HA follows the second order Ho kinetics model, with the reaction rate constant of NBB adsorption onto HA higher than the the reaction rate constant of IB adsorption onto HA. Studi of adsorption isotherm showed that the adsorption of NBB and IB in HA follows the Langmuir isotherm model with the maximum adsorption capacity of NBB and IB in HA respectively 0.12 x 10-4 and 1.04 x 10-4 mol/g. Keywords : naphtol blue black, indigosol blue, humic acid, adsorption kinetic, adsorption isotermABSTRAKStudi perbandingan model kinetika dan isoterm adsorpsi zat warna naphtol blue black (NBB) dan indigosol blue (IB) pada asam humat (HA) hasil isolasi tanah gambut Kalimantan telah dilakukan. Adsorpsi NBB dan IB pada HA mengikuti model kinetika orde dua Ho, dengan konstanta laju reaksi adsorpsi NBB pada HA lebih tinggi dibandingkan konstanta laju reaksi adsorpsi IB pada HA. Studi isoterm reaksi menunjukkan bahwa adsorpsi NBB dan IB pada HA mengikuti model isoterm Langmuir dengan kapasitas adsorpsi maksimum NBB dan IB pada HA berturut-turut adalah 0,12 x 10-4 dan 1,04 x 10-4 mol/g.Kata kunci : naphtol blue black, indigosol blue, asam humat, kinetika adsorpsi, isoterm adsorps
Penerapan K-Means Clustering Dalam Pengelompokan Lipstik Matte Lip Cream Berdasarkan Warna RGB
Get PDFLipstick is the most widely used type of cosmetics and very familiar in the community, almost all make-up brands produce this type of cosmetics. Lipstick colors can generally be grouped into the following: nude, pink, and red. The lipstick used as the object of the study were 10 (ten) samples obtained from NYX Matte Lip Cream Lipstick, from each sample sampled 1 time. From the diversity of colors, lipstick can be grouped into 3 (three), 4 (four) and 5 (five) groups. Based on this, the lipstick will be grouped using the K-Means Clustering method, but before grouping the characteristics obtained with the Euclidean Distance and Coefficient Correlation methods and the combination of various attribute formation are needed. The grouping results using the K-Means Clustering method produces 3 clusters, 4 clusters and 5 clusters where the formation of attributes by Summing up and searching for Average Values is the formation of attributes that produce the same clustering in clustering processes 3 and 4 clusters. The formation of centroid values also affects the results of grouping. The results of the grouping comparison are: grouping 3 clusters produces group A consisting of 8 members, group B and C have 1 different member. And grouping 4 clusters results in a division of groups A and D having 4 different members and groups B and C having each cluster 1 member
Efektifitas dan Efisiensi Penggunaan Klorinator sebagai Sarana Pelarut Disinfektan di Usaha Kecil dan Menengah (UKM)
Get PDFWater is an important substances in the food industry. The quality of water that is used in the small Industry (UKM) generally has bad quality. This is caused by lack of knowledge and cost. The aim of the study was to evaluate effectiveness and efficiency of using chlorinator as disinfectan (chlorine) solvent in the small industry (UKM). This study used complete randomized design with 2 repetitions and analyzed water quality before and after treatment. The parameters that was used was coliform and eschericia coli (e. coli) contaminant and total chlorine in the water. The cost efficiency was calculated with evaluate chlorine/m3. Results showed a decrease of coliform and E.coli (p<0.05), from 2,3 x105 cfu/100 ml to 0 cfu/ml for both. Furthermore, total chlorine after treatment showed no decrease significantly (p<0.05). The cost efficiency of using chlorinator was cheap, just Rp. 916/m3. The use of chlorinator was effective to decrease total microbiology contaminant and can keep total chlorine concentration in the standard of water quality for hygiene and sanitation. Furthermore, chlorinator was also efficience in cost to be implemented in small industry (UKM
Perancangan dan Analisa Implementasi LTE Home pada Jaringan 4G LTE di Frekuensi 2300 Mhz
Get PDFDesign and analysis of lte home implementation on 4g lte networks in 2300mhz frequency. The demand for data connections for customers is currently increasing. FTTx as one of the Fix broadband technology (FBB) has several weaknesses, especially when applied to rural areas. LTE Home as a smart home technology is a form of WTTx 4G LTE technology service that is expected to be able to meet the data needs of customers. This study aims to design and analyze the implementation of LTE home by measuring the value of QoS Class Identifier (QCI) and the value of Radio Frequency Key Performance Indicator (RF KPI) to improve network reliability for voice and data communication services. Some parameters measured are packet loss, delay, jitter, throughput for QCI values and Radio Signal Received Power (RSRP) and Radio Signal Received Quality (RSRQ) for RF KPI values.The results of RF KPI Measurement show that the value for RSRP is -89dBm. This value is quite good because it matches the predetermined KPI standard, which is between -70 to -90 dBm. For RSRQ values obtained for -11dBM, this result is classified as good according to the KPI standard which is <-8 dBm. These results indicate that the quality of 4GLTE network services provided for LTE Home implementation services has met RF KPI standard values. Whereas for the QCI parameters obtained results that both voice call and video streaming, the value still meets the standard Good for the User Experience KPI (QCI) value that is packet loss <5%, delay <150 ms and jitter <75 msKeywords: LTE home, RF KPI. QCI, RSRP, RSCP,packet loss, jitte
Perfomansi Parameter Carrier to Noise Interference Ratio (C/N+I) terhadap Penggunaan Metode Physical Cell Identitiy (PCI) Teknologi 4G LTE 1800 MHz
Get PDFLong Term Evolution (LTE) is a fourth generation technology (4G) developed by the 3rd Generation Partnership Project (3GPP). LTE is able to provide downlink speeds of up to 100 Mbps and uplink of 50 Mbps. Interference is a signal whose presence in telecommunications networks is undesirable, has a disturbing nature and can reduce the performance of telecommunications networks including 4G LTE technology In this study, physical cell identity (PCI) method was used to improve carrier performance to noise interference ratio which resulted in an increase in the value of 5.08 dB to 5.14 dB with a difference of 0.06 d
Rancang Bangun Alat Pendeteksi Kebusukan Telur Menggunakan Metode Fuzzy Logic Berbasis Mikrokontroler Arduino Nano 328
Get PDFEggs are a source of protein for the people of Indonesia and are always the main choice in meeting daily food needs. This is because the processing is practical and the price tends to be relatively cheap when compared to other animal protein sources.Currently the need for national chicken eggs has reached 65%, dominated by broiler eggs. It is predicted that the need for eggs nationally will increase until 2021 by 4.87% with a consumption level of 4.18% per year. Even so, in the selection of quality eggs from producers, sellers and consumers it is still fairly conventional and not guaranteed whether the eggs are suitable for consumption or not, so a new method is needed that is more efficient and knows the characteristics of good egg quality.Based on this background, a practical tool that is easy to use for conventional traders is formed.This tool works by using BH1750 and MQ-2 sensors as parameters in determining rotten eggs which are then processed using Arduino-nano 328 microcontroller, then processing the data using fuzzy logic artificial intelligence based on parameters that have been compiled from the membership function of each parameter that has been obtained from sensor. This research was conducted by collecting information first, then conducting a survey to a location in the form of a traditional market to find eggs taken randomly by testing 3 egg samples.Based on the results of three tests on 3 egg samples taken randomly, it was found that egg 2 with a Ro value of 4.29 K.Ohm, 4.53 K.Ohm and 4.79 K.Ohm and had a value of light intensity of 10.00 lux and 5.00 lux are eggs that have the best quality compared to 2 other eggs. Keywords: Egg, Fuzzy Logic, Ligh
Penentuan Kadar Capsaicin Menggunakan Metode Kromatografi Lapis Tipis (Klt) Pada Cabe Katokkon
Get PDF Penelitian ini bertujuan menentukan jenis pelarut yang terbaik berdasarkan kadar capsaicinnya, mengetahui kadar capsaicin pada buah cabe katokkon berwarna hijau dan berwarna merah dengan perlakuan bubuk dan hasil ekstraksinya pada cabe katokkon. Penelitian ini menggunakan metode kromatografi berupa kromatografi lapis tipis (KLT) yang merupakan cara pemisahan dengan adsorbsi pada lapisan tipis adsorbennya. Pelarut yang digunakan untuk mengekstrak capsaicin yaitu etanol. Hasil penelitian menunjukkan bahwa kadar capsaicin tertinggi terdapat pada bubuk cabe katokkon merah sebesar 0,304% (± 0,016) sedangkan bubuk cabe katokkon hijau sebesar 0,266% (± 0,015)
Verifikasi Golongan Darah Manusia Berbasis Citra Dijital Menggunakan Logika Fuzzy
Get PDFSistem biometrika merupakan teknologi pengenalan diri dengan menggunakan bagian tubuh manusia ataupun dari perilaku manusia, untuk meningkatkan efisiensi dan efektifitas dalam setia aspek kehidupan dengan mengurangi pemakaian kartu identitas dan kata sandi. Diperlukan sebuah sistem yang dapat membantu manusia untuk mengenali tipe golongan darah. pengenalan tipe golongan darah dapat dilakukan computer salah satunya dengan metode pengenalan pola dan pelatihan masing masing karakterristik golongan darah melalui citra.Percobaan pada penelitian ini membahas tentang verifikasi golongan darah manusia yang diawali dengan pengumpulan data, akusisi citra, preprocessing, ekstraksi ciri. dari sel darah manusia yang nantinya dapat membentuk suatu pola khusus dari kumpulan hasil ekstraksi ciri. Dengan menggunakan kombinasi metode euclidean distance dan correlation coefficient diperoleh pola hasil pelatihan yang menggunakan fuzzy linguistic value berada pada rentang low medium dan medium. Dengan menggunakan 20 data uji dimana setiap golongan darah terdiri dari 5 sampel, diperoleh keputusan hasil verifikasi kecocokan yang diuji dengan menggunakan metode unjuk kerja False Acceptance Rate (FAR) sebesar dan False Rejected Rate (FRR) sebesar 45% dengan tingkat Akurasi (Acc) sebesar 83
Microwave Rectifier untuk Transmisi Listrik Tanpa Kabel dengan Metode Matching Impedance
Get PDFIn this modern era, the high consumption of electrical energy requires considerable resources. Resources used in this modern era include non-renewable energy and environmentally unfriendly, so it takes a new method that is environmentally friendly to meet the needs of electric energy consumption. The energy harvesting technique comes as an environmentally friendly source of energy, harvesting energy techniques utilize the resources around us without causing waste and pollution. Rectifier with matching impedance as a wireless power transmission with signal rectifier capability is an environmentally friendly method of energy harvesting technique. Rectifiers can generate electrical energy sources by utilizing electromagnetic waves as resources captured by antennas. Rectifiers are designed with application simulation process, matching impedance calculation, design printing and measurement with special measuring instrument. Rectifiers are designed and realized in the form of full-wave rectifier types. This rectifier uses a schottky diode HSMS 2860, The measurement of rectifier that uses a signal generator as a measuring device generated output of 5.08 V at 2.4 Ghz level +20 dBm and return loss -37.70 dBm at 2.4 Ghz level +5 dB. Keywords: Microwave, Rectifier and Matching Impedanc
Analisa Head Mayor Dan Minor Pompa Chiller Dengan Bukaan Katup Instalasi Pompa Tunggal
Get PDFPompa sentrifugal merupakan salah satu jenis pompa yang banyak digunakan dalam bidang industri, pertanian dan rumah tangga. Pompa sentrifugal dapat dijumpai pada pompa Chiller yang dipakai di perusahaan PT.X Bontang. Telah dilakukan penelitian dan analisis terhadap pompa chiller yang dipasang tunggal. Penelitian ini bertujuan untuk menghitung head losses mayor dan head losses minor pada variasi bukaan katup instalasi pompa tunggal. Dalam penelitian pompa chiller yang penulis lakukan, menggunakan variasi bukaan katup 100%, 75%, 50%, 25%, dan 10%. Dari hasil pengujian dilapangan debit terbesar ditunjukan pada bukaan 100% dengan 0,0053 m3/s. Dari hasil perhitungan untuk head losses mayor diperoleh 4,629 m bukaan 100% dan 1,151 m bukaan 10%. Perhitungan head losses minor diperoleh 9,7 m bukaan 100% dan 2,1 m bukaan 10%. Dari data yang diperoleh bahwa semakin besar bukaan katup maka semakin besar pula head losses mayor dan head losses minor