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Jurnal Ilmiah Poli Rekayasa

JPR
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Published by Politeknik Negeri Padang

ISSN : 18583709 EISSN : 26853922 DOI : 10.30630/jipr

Core Subject : Education,

Education

Jurnal Ilmiah Poli Rekayasa adalah jurnal ilmiah yang diterbitkan 2 edisi dalam setahun, bulan April dan Oktober. Terbit sejak tahun 2005. Fokus Kajian jurnal ini adalah Fokus kajian artikel dalam JPR mencakup Mechanical Engineering, Civil Engineering, dan Electronica, Electricty dan Telecomunication EngineeringLingkup Jurnal Ilmiah Poli Rekayasa meliputi : 1) Energi terbarukan (rewnable energy), 2) Inovasi kendaran bermotor hemat BBM, 3) Material Maju, 4) Emisi dan pembakaran motor bakar, 5) Rekayasa termal dan fluida, 6) Rekayasa power plant, 7)Material komposit, 8) Biomaterial, 9)Teknologi pengujian tak merusak (Non Distruction Test/NDT), 10) Kontrol dan mekatronika, 11) Planing untuk pengurangan resiko bencana, 12) Sistem transportasi antar moda, 13) Rekayasa konstruksi, bangunan, jembatan dan Jalan, 14) Manajemen daerah aliran sungai, air tanah, sedimen dan waduk, 15) Remote Sensing Harap baca panduan ini dengan seksama. Penulis yang ingin mengirimkan artikel ke Jurnal Ilmiah Poli Rekayasa, harus mengikuti panduan penulisan. Jika artikel yang dikirim tidak sesuai dengan panduan penulisan atau ditulis dalam format yang berbeda, maka akan DITOLAK oleh editor sebelum ditinjau lebih lanjut. Para editor hanya menerima artikel yang memenuhi format yang ditetapkan. Artikel ditulis dalam bahasa indonesia. Jurnal Ilmiah Poli Rekayasa menggunakan prosedur penilaian Double Blind. Dimana antara penulis dengan mitra bestari tidak saling mengenal identitasnya masing-masing. Silahkan kirimkan artikel anda dan untuk unduh Template DI SINI Etika Publikasi dapat dilihat pada tautan berikut ini : ETIKA PUBLIKASI.

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Search results for , issue "Vol 15, No 2 (2020): -" : 11 Documents clear

Sifat Fisik Dan Mekanik Papan Komposit Dari Serat Tandan Kosong Kelapa Sawit (TKKS) Hasil Penguraian Secara Mekanis Dengan Perekat Gambir Junaidi - -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Oil palm empty fruit bunches (OPEFB) are a solid waste product from the oil palm industry that are about 70% fiber. Previous research has indicated that this fiber can be used to produce composite board. Gambier can be used in an adhesive to produce these boards as it has strong adhesive properties. This research investigates the suitability of four types of OPEFB fiber resulting from different mechanical separation speeds and three adhesive made from differing concentrations of Gambier (12%, 14%, 16%) to produce high quality composite board. The results of the research suggest the type of the fiber and the concentration of the gambier used significantly influence the density of the resulting board and that there are interactions between these two variables. The water content of the board is significantly influenced by the type of OPEFB fibre but not by the concentration of gambier or any interaction between these variables. Thickness swelling, modulus of rupture (MOR) and modulus of elasticity (MOE) are all influenced by type of fiber and concentration of gambier without any significant interaction between these two factors. The best types of fiber was those labeled A and B. The best performing composite board was produced from the longer B fibers and 16% gambier adhesive. This board a had density of 0.86 g/cm3, MOR 251.3 kg/cm2 and strength parallel to the grain of 145.6 kg/cm2. This data suggests that the density, water content and MOR of the boards made with this combination of material meets standard SNI 03-2105-2006 however the thickness swelling of the board fails this standard.

Analisa Pengaruh Perubahan Penggunaan Lahan terhadap DAS Batang Kuranji dengan Menggunakan Model Soil and Water Assessment Tool (SWAT) Annisa Fitriana Definnas; Rozy Fairuzza Reyandal; Elvi Roza Syofyan; Wisafri - -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Batang Kuranji is one of six rivers that flow in the city of Padang, and is the main source of water for residents of Padang City to meet the raw water which is then processed into clean water and the needs of Mt. Nago irrigation water. The increase in population causes the population to move to a higher area (green zone). Batang Kuranji watershed has experienced a reduction in the area of forest land due to changes in land use activities by the population movement. As a result, land that was not watertight at first became watertight, the mainstay discharge or expected discharge is always available, always increasing during the rainy season and decreasing during the dry season. This study was conducted to determine the extent of land use change in the Batang Kuranji watershed, also to determine the main discharge that occurred in 2009, 2011, and 2017 using the Soil and Water Assessment Tool (SWAT) model. The analysis consists of four processes, namely watershed delineation, formation of a Hydrologic Response Unit (HRU), formation of climatological data, and finally the simulation process. HRU analysis results obtained by Batang Kuranji watershed into 9 sub-watersheds, the dominant HRU is protection forest by 62%, soil type with depth (solum) level A and B, runoff coefficient of 0.3 and NS value obtained by 0.6. This shows that the SWAT model can predict the hydrological process in the upstream Batang Kuranji watershed. The most influential land use on surface runoff is land use for settlement.

Analisis Portofolio Optimal : Pendekatan Mean Variance Pada Harga Komoditas Pangan di Kota Padang Elfa Rafulta -; Roni Tri Putra
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Investment is a number of commitments or a number of funds or resources made at this time with the aim of obtaining future profits. One method that can be used to form an optimal portfolio is to use the mean variace approach. Asset selection is carried out on food commodities namely rice, eggs, cooking oil, granulated sugar, and red chili. From the data processing it is found that the weight of each commodity is cooking oil (99.95%), eggs (0.03%), granulated sugar (0.04%), red chili is negative (-0.02%), and rice (0.00%). So that it can be estimated that the expected profit is -0.0024% and risk is 0.0001%.

KAJIAN MANFAAT SENYAWA AKTIF DALAM EKSTRAK KULIT BUAH COKLAT (THEOBROMA CACAO ) -, Sukatik -; -, Rahmi Hidayati; Putra, Roni Tri; -, Ratih Paramitha
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Identification of active compounds in cacao pod rind has been done. Cacao pod rind contained active compound alkaloid, theobromine (3,7-dimethylxanthine). Cacao pod rind extract contained some other active compounds mixed flavonoid or condensed tannin such as anthocyanin, anthocyanidin, catechin, epicatechin, epigallocatechin, and leucoanthocyanidin. Cacao pod rind was extracted by maceration using methanol 70% and fractionated with hexane and ethyl acetate to obtain polar extracts. This study used an experimental method that was analyzed descriptively using Gas Chromatography-Mass Spectrometry (GC-MS) and Liquid Chromatography-Mass Spectrometry (LC-MS). Phytochemical screening test showed cocoa pod rind extracts contained alkaloids, flavonoids, tannins, terpenoids, and saponins. GC-MS analysis showed that cacao pod rind extracts contained 24 compounds. Polar extracts analysis with LC-MS obtained 10 compounds contained hydroxy groups, which can be used as corrosion inhibitors on metal. The result of this study showed that cocoa pod rind has potential as corrosion inhibitor. It also has potential as an anti-bacterial and antioxidant.

Studi Penentuan Nilai Koefisien Pengaliran DAS Batang Arau di Kota Padang Fitri Handayani -; Rahmania Hardiyenti -; Indra Agus -; Sadtim - -; Hartati - -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Batang Arau river is located 0048” up to 0056” SL (South Latitude) and on 100021” up to 100033” LE (Longitutede East), and upstream part water catcment area it is cover 30,90 km2 area. The above said catchment area is a region consist of densely .populated and also dominated by vegetation of natural forest, protected forest, people’s forest, mixed forest, farm, recefield and yard. Based on site observation, most of the forest has changed become residant farms and settlement. This condition can be shown by land use map and change of runoff which was change from year to year. With this land use change however will also affecty changing of runoff coefficient. The goals of this study is to get flow coefficient (c) based on land use coefficient, debit AWLR, and based on SWAT application. Calculation of the coefficient based on land use map until be done by Arcgis method, debit AWLR using Hasper method and SWAT application. Study shown in period between 2009 – 2017, coefficient flow result is in range 0,36 – 0,37. Flow coefficient using AWLR result is in range 0,36 – 0,37, while flow coefficient using SWAT method is 0,25 – 0,36

EFFECT OF DEM RESOLUTION ON EROSION IN BATANG KURANJI WATERSHED Syofyan, Elvi Roza; -, Bambang Istijono; -, Amrizal Saidi; -, Revalin Herdianto
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Batang Kuranji Watershed is one of the region river at Indragiri - Akuaman with a total area of Watershed 224.7 km2 consisting of Batang Sungai Sapiah Sub Watershed, Batang Danau Limau Manih Sub Watershed, Batang Sungkai Sub Watershed, Batang Bukik Tindawan Sub Watershed and Batang Padang Janiah Sub Watershed. Batang Kuranji flows from upstream of the Bukit Barisan with the highest elevation + 1,605 meters above sea level at the peak of Bukit Tinjau Laut and empties into the Padang beach with a main river length of ± 32.41. DEM has an influence on the results of land erosion by affecting the slope accuracy. The higher the DEM resolution, the more precise the results of the soil erosion simulation. With the Musle method the rate of erosion occurs in the Batang Kuranji watershed, with DEM data of 8m and land cover in 2017, an erosion rate of 23.91 tons / ha / year is classified in hazard class II (light), DEM data of 30m erosion rate is 7. 70 tons / ha / year are classified in hazard class I (very mild), with DEM data of 90m erosion rate of 4.54 tons / ha / year classified in hazard I class (very light). It can be seen that the higher the DEM resolution, the more accurate the erosion rate calculation in the watershed.

Analisis dan Pengukuran Tanggapan Frekuensi terhadap Redaman Serat Optik Uzma Septima -; Lince Markis -; Ramiati - -; Andi Ahmad Dahlan; Sri Nita -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

The concept of smart home and cyber home is not the same, even much different. If a smart home or smart home is more aimed at users or home users who lead to conventional homes equipped with digital devices, the concept of cyber home is more to the bandwidth capacity of the internet to complement digital devices in the home. For this reason, Cyber Park Indonesia cooperates with PT Wika Realty. Specifically to develop the housing as a cyber home, Cyber Park Indonesia uses optical fiber. [Kompas, 2017]. This fact states that communication using optical fiber becomes very important so that to optimize the optical fiber system, a study that produces frequency responses to optical fiber attenuation parameters is made. Various sine signal frequency and amplitude values are given as input from an optical fiber dispersing system by looking at the response of the receiver in the form of voltage parameter values. The frequency values given range from 100 Hz to 10 Khz. The linkage of the input amplitude value to the damping value is an output voltage output generated by the amplitude of the amplitude parameter at the sending end. This voltage value comparison is used as the damping parameter of an optical fiber communication system. Giving this frequency will provide the performance of a fiber optic communication system. The resulting voltage value is a constant of changes in the frequency value.

Kajian Manfaat Senyawa Aktif dalam Ekstrak Kulit Buah Coklat (Theobroma Cacao ) Sukatik - -; Yuli Yetri -; Rahmi Hidayati -; Roni Tri Putra; Ratih Paramitha -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Analisis Banjir Di Kawasan Jondul Rawang Kota Padang Beno Putra Susanto; Dyen Triana Putri; Zahrul Umar -; Aguskamar - -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Flood has been an endless disaster for human being all over the world since the past, nowadays and in future. Water flood may be affected by nature or human activities or even by both nature and human. Almost all region in Indonesia facing the flood problem with various scale and time.Jondul Rawang one place located in south side of Padang city for example is always suffer with water flood. This study is an analysis of flood for Jondul Rawang, using EPA SWMM 5.1 software with simulation method. The simulation result will show location of points on drainage system which start to offer flowincluding the time and duration. Calculation is made based on collected data, hydrology and hydraulyc analysis.The data should cover primary and secondary drainage system then come out with design flood and hydraulyc analysis to check the capacity of drainage.Calculation of rainfall for repeat period using probability method Chi-Kuadratand Smirnov-Kolmogorof will obtain Log Normal Method for rainfall 251,62 mm. To calculate water debit inside drainage for 5 years period flood exist channel 1-2, 3-4, 5-6, and 8-9 with respective overflow 4,5 m3/sec, 6,53 m3/sec, 6,36 m3/sec, and 6,50 m3/sec. While capacity of respective existing drainage are lower such as: 4,47 m3/sec, 5,48 m3/sec, 2,96 m3/sec, and 1,82 m3/sec. Solution to be taken place to resolve the flood problem for Jondul Rawang are Enlarge the drainage size, build retention pond and build infiltration pond.

Model Hidrologi Terdistribusi untuk Analisis Debit Terserap pada Sumur Resapan, Lubang Biopori dan Kolam Retensi Elvi Roza Syofyan; Bambang Istijono -; Amrizal Saidi -; Revalin Herdianto -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Infiltration wells, biopore holes, retention ponds serve to collect surface water from rain and then seep into the ground to become ground water reserves. This study aims to look at the application of a distributed hydrological model for the analysis of absorbed discharges in infiltration wells, biopore holes and retention ponds in the Batang Kuranji watershed. Research methods the study was conducted using a survey method that is secondary data collection and primary data. In this study the techniques of rainfall data analysis, Batang Kuranji watershed land use, Runoff analysis using distributed hydrological models and absorbed discharges in infiltration wells, biopore holes, retention ponds in the Batang Kuranji watershed. By applying model 4 using 1 infiltration wells, 2 biopore holes and 4 retention ponds can reduce the runoff rate in the sub-watershed by 7.514% - 27.545%, for the watershed level can reduce the discharge of 15.297%, the more the number of absorption wells, biopori holes and retention ponds more effective in reducing runoff in the Batang Kuranji watershed.

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