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Jurnal Teknologi

teknologi
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Published by Politeknik Negeri Lhokseumawe

ISSN : 14121476 EISSN : 25500961 DOI : http://doi.org/10.30811/teknologi

Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

Jurnal Teknologi is a peer-reviewed journal that aims at the publication and dissemination of original research articles on the latest developments in all fields of technology and engineering sciences. The journal publishes original papers in Indonesian and English, which contribute to the understanding of engineering science and the improvement of engineering technology. Papers may be theoretical, experimental, or both, and applied engineering science and technology. The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere. The scope of Jurnal Teknologi includes a wide spectrum of technology and engineering science subjects including: Civil engineering; Mechanical engineering; Chemical engineering Electrical engineering; Information and technology; Computer science and engineering; Materials science and engineering; Renewable energy engineering;

Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)

Articles 76 Documents

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Pengaruh Penambahan Surfaktan Gum Arabic Terhadap Sifat Fisik dan Stabilitas Fluida Nano Titania (TiO2) Yulia Safitri; Irwan Irwan; Cut Aja Rahmawati
Jurnal Teknologi Vol 21, No 1 (2021): April 2021
Publisher : Politeknik Negeri Lhokseumawe

This study aims to examine the physical properties of titania (TiO2) by adding arabic gum surfactants to obtain stable nanofluid. Nano titania fluid preparation was carried out by dispersing titania nanoparticles and arabic gum in a homogenizer for 3 hours with particle variations in fraction volume and arabic gum surfactant concentration. The study was carried out by varying the volume of the particle fraction at 0.1%; 0.2%; 0.3%; 0.4% and 0.5% and arabic gum surfactant concentrations at 1%; 2%; 3%; 4%; and 5%. Measurements are also made at a temperature variation of 30 OC; 40 OC; and 50 OC. Measurement of physical properties is carried out by measuring the properties of electrical conductivity, density, viscosity, and stability of titania nanofluid. The measurement results indicate that the higher the concentration of surfactant and the volume fraction of particles, the electrical conductivity, density, and viscosity of nano titania fluid is increasing. Increased temperature will reduce the viscosity of titania nanofluid.

Kajian Sifat Mekanik Beban Kejut Komposit Epoksi Berpenguat Serat Sabut Kelapa Indra Mawardi; Zul Saputra; Fakhriza -
Jurnal Teknologi Vol 16, No 1 (2016): April 2016
Publisher : Politeknik Negeri Lhokseumawe

This study aims to determine the impact strength fiber-reinforced epoxy composites coco Composites made using a matrix of fiber-reinforced epoxy resin and coco. Coco fiber used is cleaned and dried in the sun for three days. Coco fiber is cut with every fiber length ± 3 cm, then soaked in an alkaline solution (NaOH) 2.5% for 5 hours. Composites formed with a variation of the weight of the matrix of the fiber that is 10, 20, and 30. This experiment is testing the impact. The highest impact toughness value generated on epoxy composite with the addition of coconut coir fiber as much as 30% compared to 20 and 10% variation. The greater the percentage of coco fiber, the higher the value of the impact toughness

ANALISA TEGANGAN ELBOW SPIRAL INLET PADA BEJANA TEKAN SIKLON PEMISAH UAP DAN AIR GEOTHERMAL MENGGUNAKAN ANSYS Asbar Razali
Jurnal Teknologi Vol 14, No 1 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Separating tool like cyclone is also used as a separator between steam and water in geothermal, which most of its vital components dominated from water and steam, The voltage analysis is necessary as a reference of integrated material when operating and distributing mechanical load received by object structure.This research is aimed to observe the level of safety occurred in inlet spiral elbow by using ANYSYS. This research used SA-516 Gr. 70,SA 106 Gr.B, and SA 36 materials which are appropriate based on ASTM standard. The materials modeling used by using Solidworks 2013 software. The analyzing system used in this research is Static Structural by choosing the result of voltage analys solution using von-mises and Total Deformation. The result showed that in cyclone separator of pressure vessel with pressure given 1.386 MPa gained the maximum voltage,432,72 N/mm2 and the distribution of maximum deformation was 5.099 mm

Analisis Parameter Geser Tanah Lempung Hasil Stabilisasi Dengan Abu Serbuk Kayu Supardin Supardin
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

This study aims to measure the shear parameters of clay mixed with variations in sawdust ash. Utilization of wood waste which is converted into ash and then mixed with clay of low strength is expected to give the effect of more bearing capacity on the soil. Mixing percentage of sawdust ash to clay was carried out with variations of 5%, 10%, 15% and 20%. The mixing of clay soil with sawdust ash was stabilized through compaction testing, then a direct shear test was carried out to obtain shear parameters. The test results obtained were an increase in the cohesion value of the original soil 0.182 kg/cm2, an increase of 0.240 kg/cm2 successively; 0.310 kg/cm2; 0.396 kg/cm2 and decreased with the addition of 20% sawdust ash 0.237 kg/cm2. Likewise, the increase in the value of the internal shear angle, the initial condition was 5,300 and increased with the addition of wood ash from 13,310; 15,030; 18,300 and decreased on a 20% mix to 15,700. This means that the use of sawdust ash can provide the carrying capacity of clay soil to a certain level (an average of 33.5% for the cohesion value and 34.8% for the average internal shear angle value).

Penggunaan Ekstrak Daun Pepaya Sebagai Inhibitor Korosi Baja Karbon Dalam Lingkungan Crude Oil Muhammad Libasut Taqwa; Irwan Irwan; Pardi Pardi
Jurnal Teknologi Vol 21, No 1 (2021): April 2021
Publisher : Politeknik Negeri Lhokseumawe

The study of papaya leaf extract as a carbon steel corrosion inhibitor in a crude oil environment has been investigated using a weight-loss method. The effects of papaya leaf extract concentrations and immersion time have been employed to investigate the corrosion rate, with a variation of papaya leaf extract concentrations of 0, 1, 2, 3, 4, and 5 % volume and immersion time of 1, 2, 3, 4 and 5 hours. The results showed that increasing papaya leaf extract concentrations decreased the corrosion rate of carbon steel in a crude oil environment. While the increase of immersion time enhances the carbon steel corrosion rate in a crude oil environment. The lowest rate of corrosion obtained was 4.0152 mpy using papaya leaf extract concentration of 5 % volume at 5 hours immersion time. The inhibition efficiency also increased with increasing concentrations of papaya extract and immersion time. The highest inhibition efficiency was 65.54% at the concentration of papaya leaf extract 5% vol. at 5 hours immersion time.

PENGENALAN CITRA TANDA TANGAN MENGGUNAKAN GRAY LEVEL CO-OCCURRENCE MATRIX (GLCM) DAN PROBABILISTIC NEURAL NETWORK (PNN) Ismi Amalia
Jurnal Teknologi Vol 14, No 1 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i1.261

The signature of a person is an important biometric attribute of a human being which can be used to authenticate human identity. There are various approaches to signature recognition with a lot of scope of research. In this paper, off-line signature recognition using probabilistic neural network is proposed, where the signature is captured and presented to the user in an image format. Signatures are recognized based on parameters extracted from the signature using gray level co-occurrence matrix. The features obtained are dissimilarity, entropy, and homogeneity. The recognition and verification was performed using probabilistic neural network. The proposed algorithm was tested on 100 signatures. The images of signature were divided in two sets: training set and test set. The leave-one-out cross-validation technique was applied for model validation. The research showed that the average accuracy from PNN was 71%

PENGARUH WAKTU PENCUCIAN TERHADAP SIFAT MEKANIS PRODUK LATEKS KARET ALAM RENDAH PROTEIN - Yuniati; - Adriana; Ramzi Jalal
Jurnal Teknologi Vol 14, No 2 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i2.247

This study is aimed to observe the use of coconut shell used as Carbon for filler material for gloves making. Two important factors in making gloves with the immersion technique are leaching and heating processes that can increase the mechanical properties. This research is also aimed to find a solution of washing procedure and the best time to get the mechanical properties, so the laundering can reduce the allergic reaction for the sentive users... A method which has been experienced is maturation process for 24 hours and was condunted of vulcanization by drying it in the oven with 100 °C for 15 minutes. The leaching process of the film is conducted by using some sort of solutions ; aquadest, 1% sodium hydroxide and 1% Ammonium hydroxide . The examining time used for laundering and soaking are 30, 60 and 90 minutes.. The highest tensile strength was obtained in 30 minutes soaking time with 25,3 MPa Aquadest. . The tensile strength increased along with the extra time for laudering and soaking process in 90 minutes with aqudest and 90 minutes with 800 % sodium hydroxide. . The highest modulus , 300 %, was obtained in 90 minutes soaking/ laundering time in 1,7 Mpa Ammonium Hydroxide solution

Sistem Informasi Bimbingan Akademik Mahasiswa Untuk Mengatasi Social Distancing Pada Masa Pandemi Covid-19 Musta’inul Abdi
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

Since the COVID-19 pandemic was declared a global pandemic in mid-March 2019, all countries in the world are struggling to overcome this pandemic. This pandemic greatly affects all sectors of human activity such as social, economic, and education. The Indonesian government has given instructions on preventing the spread of the COVID-19 virus in the university environment, all educational activities must be carried out online. In this difficult situation, students, lecturers, and universities find it difficult to adapt to these new habits. the process of student guidance and counseling as a means of supporting students in their education and monitoring student development becomes problematic. So that a solution is needed to solve the problem, the student guidance and counseling information system is a solution that can be done. This system is able to overcome the problem of space and time constraints for students and lecturers to conduct consultations. The results of the survey testing that have been carried out, 90% of respondents agree that this system is feasible to implement and is able to overcome the problems of guidance and counseling during social distancing.

Isolasi Senyawa Anti Bakteri Geraniol Dari Minyak Sereh Wangi (Citronella Oil) Dengan Menggunakan Distilasi Vakum Uswatun Hasanah; Zulkifli Zulkifli; Teuku Rihayat; Andi Wardana; Cut Nazia N
Jurnal Teknologi Vol 21, No 1 (2021): April 2021
Publisher : Politeknik Negeri Lhokseumawe

This study aims to increase geraniol levels in citronella oil, using vacuum distillation. Geraniol is a compound that has been legalized by IFRA (Fragrance International Association) as a scent compound, so geraniol is a reference to be formulated in the form of Anti-bacterial perfume products, but the levels of geraniol in citronella oil are still very low. This encourages the processing of fragrant citronella oil to be processed, by increasing geraniol levels using vacuum distillation, with variations in pressure: 8,6,4,2,1 mbar, during operating times: 20, 40, and 60 minutes up to FBP ( Final Boiling Point). Samples were analyzed using GC-MS (Gas Chromatography-Mass Spectrometry), FT-IR, refractive index, and bacterial testing. The results showed that the use of low pressure affected increasing geraniol levels. The maximum increase in geraniol content was 80.11% at a pressure of 1 mbar at the Final Boiling Point operation, with a refractive index of 1.501, whereas in the FTIR test there was an intense broad peak in the range 2200-3200 cm-1 especially at 3086.98cm-1 according to the OH hydroxyl polymer group at Geraniol. This study increased geraniol levels from 20.32% to 80.11%.

Koagulasi Protein Pada Pembuatan Tahu pengan Menggunakan Enzim Papain Ayu Ardia Rizki; Faridah -; Elwina -
Jurnal Teknologi Vol 16, No 1 (2016): April 2016
Publisher : Politeknik Negeri Lhokseumawe

Enzymes are protein which are used as catalyst in biologycal systems and could lead to changes of certain reactions. One of the enzymes that can be used to hydrolyze the proteins is papain enzyme. This study aimed to determine the effect on the reaction kinetics combine with the addition of the papain enzyme from papaya latex extraction. The soy milk obtained from the extraction of soya in a was of soybeans that have been soaked ± 12 hours and then cleaned and blended with the addition of hot water for three times. The ratio of weight of soya beans to water is 1 : 3. Further more, the soy milk was then heated and coagulated at 70oC and added with concentration of the papain enzyme from papaya latex extraction of 200, 600, and 1000 ppm concentration. The test results of reaction kinetics are obtained by Km 25 and Vm 3.303 ppm/minute.

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Irwan

Contact Email jurnalteknologi@pnl.ac.id

Phone +6282168374201

Journal Mail Official jurnalteknologi@pnl.ac.id

Editorial Address Politeknik Negeri Lhokseumawe Jl. Medan Banda Aceh Km. 280,3 Buketrata Lhokseumawe

Location Kota lhokseumawe, Aceh INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Irwan

Contact Email
jurnalteknologi@pnl.ac.id

Phone
+6282168374201

Journal Mail Official
jurnalteknologi@pnl.ac.id

Editorial Address
Politeknik Negeri Lhokseumawe Jl. Medan Banda Aceh Km. 280,3 Buketrata Lhokseumawe

Location
Kota lhokseumawe,

Aceh

INDONESIA