cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
A. Jannifar
Contact Email
polimesin@pnl.ac.id
Phone
+628126930456
Journal Mail Official
polimesin@pnl.ac.id
Editorial Address
Politeknik Negeri Lhokseumawe Jl. Banda Aceh-Medan Km 280 Buketrata, Lhokseumawe, 24301, Aceh, Indonesia
Location
Kota lhokseumawe,
Aceh
INDONESIA
Jurnal Polimesin
Published by Politeknik Negeri Lhokseumawe
ISSN : 16935462     EISSN : 25491199     DOI : http://dx.doi.org/10.30811/jpl
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering
Polimesin mostly publishes studies in the core areas of mechanical engineering, such as energy conversion, machine and mechanism design, and manufacturing technology. As science and technology develop rapidly in combination with other disciplines such as electrical, Polimesin also adapts to new facts by accepting manuscripts in mechatronics. In Biomechanics, Mechanical study in musculoskeletal and bio-tissue has been widely recognized to help better life quality for disabled people and physical rehabilitation work. Such a wide range of Polimesin could be published, but it still has criteria to apply mechanical systems and principles. Exceeding the limitation has been a common reason for rejection by those outside the scope. Using chemical principles more than mechanical ones in material engineering has been a common reason for rejection after submission. Excessive exploration of the management within the discipline of Industrial Engineering in the manufacturing technology scope is also unacceptable. The sub-scope biomechanics that focuses on ergonomics and does not study movement involving applied force on the bio-tissue is also not suitable for submission.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 503 Documents
 22   23   24   25   26 
The development of a wearable device for Sign Language Gesture Recognition (SLGR) by using Conceptual Design Approach (CDA) Sarika Zuhri; Syahriza Syahriza; Teuku Andhika Malik Rahman; Rizki Agam Syahputra; Iskandar Hasanuddin
Jurnal POLIMESIN Vol 21, No 4 (2023): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i4.3744

Abstract

In recent years, there has been a significant focus on researching and developing Sign Language Gesture Recognition (SLGR) for people with hearing and speaking impairments. This is especially important in Indonesia, where there are approximately two million people with these disabilities. However, current research and developments on SLGR devices are specifically designed to understand only particular sign language systems, such as Korean Standard Sign Language (KSDSL) and American Sign Language (ASL), each of which has its unique gestures and models. As a result, no device has been developed to recognize the gestures of the Indonesian sign language system, known as Sistem Isyarat Bahasa Indonesia (SIBI). Therefore, this study aims to develop an SLGR device that can recognize and translate SIBI gestures into output images via text and speech. The development of the SLGR device in this study is conducted by using the Conceptual Design Approach (CDA) methodology. Where in this case, previous research on SLGR devices is first observed as a benchmark for comparison. Furthermore, the benchmark is used as the basis for the function, sub-function, and specification of the proposed design. Based on these stages of benchmarking and concept development, the study concluded that the final design of the proposed SLGR device is constructed by using 5 flex and Gyroscope sensors connected wirelessly to the Raspberry microcontroller. The device is equipped with a voice system and LCR RPi as the output system for translation. Based on the combination of these sensors, the device is able to identify any particular gestures that correspond to words and phrases in SIBI and translate them into speech via the designated speaker and text display on the LCD screen. To fully understand the performance of the device, experimental tests are conducted by analyzing the input of 26 alphabets in the SIBI system. As a result, the device demonstrated an average of 92% accuracy to convert sign language into voice and text, which demonstrates the usefulness of the proposed device
Pengaruh pengelasan pada baja karbon sedang terhadap ketangguhan retak Bukhari Bukhari
Jurnal POLIMESIN Vol 8, No 2 (2010): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jop.v8i2.1362

Abstract

Pengelasan merupakan salah satu cara untuk menyambung dua atau lebih potongan logam secara permanen. Ketangguhan suatu material hasil pengelasan sangat tergantung pada kualitas daerah lasan. Beberapa metode telah digunakan untuk mengetahui ketangguhan daerah lasan dari suatu material, seperti uji impact dengan metode Charpy, atau metode Izod. Metode lain yang bisa digunakan untuk pengujian ketangguhan daerah lasan adalah dengan metode pembebanan dinamik gas gun. Metode ini bisa memberikan hasil yang lebih spesifik terhadap ketangguhan dari material, dimana dengan metode ini nilai kekuatan material terhadap beban impact dapat diketahui dalam satuan gaya (Newton) persatuan luas penampang (mM), yaitu Mpa. Penelitian ini dilakukan untuk mengetahui pengaruh volume lasan terhadap ketangguhan retak dari material baja karbon sedang yang telah dilakukan proses pengelasan dengan elektroda terbungkus jenis oksida titan yang termasuk ke dalam klasifikasi JIS D4313: Uji retak impact dilakukan dengan mesin pembebanan dinamik gas gun. Spesimen uji dari pengujian ini divariasikan dalam tiga kelompok yaitu spesimen uji dengan volume lasan 9046, 10026, dan 11046. Besar beban impact diatur dengan cara mengatur jarak impact dan tekanan tabung gas. Pada pengujian ini, tekanan output tabung diatur pada 5,3 Bar dan jarak impact divariasikan mulai 25 cm sampai 125 cm. Pengukuran beban impact dilakukan dengan cara memasangkan sensor strain gauge pada lokasi impact. Nilai ketangguhan retak tertinggi dari ketiga spesimen uji adalah spesimen dengan volume lasan 9046 dengan harga tegangan sebesar 268,982Mpa.Kata kunci: ketangguhan retak, tegangan impact, laju intensitas tegangan
Pengaruh Fraksi Volume Komposit Poliester Diperkuat Serat Rambut Manusia Dan Serabut Kelapa Terhadap Sifat Mekanik akbar anggoro putra
Jurnal POLIMESIN Vol 20, No 2 (2022): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i2.2935

Abstract

Currently, composite applications range from the automotive, marine, and even aircraft sectors. One of the composites that have attracted a lot of attention from researchers is composites with natural fibers because natural fiber composites can be used as an alternative to synthetic or plastic materials. The low-density nature of natural fibers can provide good stiffness and strength as in fiberglass-reinforced composites. Coconut coir fiber and human hair waste are the basic materials for the manufacture of composites in this study. Because the amount is abundant so it is easy to obtain. The purpose of this study was to determine the effect of the variation of the best volume fraction of natural fiber composites with polyester matrix on the mechanical properties. The method used is hand layup with 3 variations of fiber volume fraction and polyester matrix, respectively 10:90, 15:85, and 20:80 and with the size of short hair fibers with a size of 3 cm and long coconut fibers with sizes according to the length of the print. The ratio of human hair fiber and coconut fiber is 1:1. Each fraction was tested 3 times to be more accurate. The results of the average tensile strength test with the largest ASTM D638 standard are at the volume fraction of 10:90 with a tensile strength of 19.2 MPa and the average impact test strength with the largest ISO 179-1 standard at the volume fraction of 20:80 is 17, 67 kJ/m². This study showed that the higher the fiber fraction in the composite, the lower the tensile strength but the higher the impact strength. Vice versa, the lower the fiber fraction in the composite, the tensile strength increases but the impact strength decreases.
Experimental Test of the Effect of PCM Volume as Thermal Energy Storage Solar Power in Solar Cooking Units Napitupulu, Richard A.M.; Peranginangin, Siwan E.A.; Siagian, Parulian
Jurnal Polimesin Vol 21, No 5 (2023): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i5.4266

Abstract

One solution that can be taken to reduce GHG emissions is to reduce consumption of fossil fuels and replace them with renewable energy sources. Indonesia is rich in renewable energy sources, and one that has potential to be developed is solar energy. In line with Indonesia's development into a developed country, energy consumption is increasing. One of the activities that contributes to the largest energy use is cooking. The need for energy for cooking in Indonesia is large because the population and households are very large, No. 4 in the world. Solar Cooker is an alternative to reduce the use of fossil or traditional energy for cooking activities. Previous research has shown how the performance of a Solar Cooker can be improved if it is integrated with PCM thermal energy storage, making it possible to speed up cooking time, cook with low solar intensity and even make it possible to cook at night. However, the quantitative influence of the number of PCMs in a solar cooker has not been specifically explained or studied. A low quantity of PCM results in reduced performance, while a high quantity will increase the thermal load, and thus overheating. This research tested 4 units of Simple Tube type Solar Cooker with different quantities of PCM for each unit. From the results of testing the Solar Cooker with the PCM thermal Energy Storage TEST with variations in PCM volume, it showed performance in storing heat for longer even in conditions of high rainfall day and night conditions. This is shown from all observation results during the 6 days of the experiment. As evidenced by the low ambient air temperature and high humidity, especially at night, the temperature drop in the cooking vessel water is quite low. This applies to every variant. From the experimental results, it can also be seen that variants number 1 and 3, especially number 3, have quite good performance, in absorbing heat and storing heat with an outer diameter of 350 mm
Analisis titik potong bentangan dua pipa untuk sambungan sudut 45° dengan metode grafik Turmizi Turmizi
Jurnal POLIMESIN Vol 7, No 2 (2009): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jop.v7i2.1386

Abstract

penyambungan  pipa   pada konstruksi   baja  dan pipa   melalui  gambar   bentangan  sehingga   memudahkan   untuk:   memotong bentuk  yang   diinginkan.    Berikut   sebuah    contoh    untuk  perpotongan  dua pipa  yang   terhubung dengansudut kemiringan 45°. Dengan beberapa tahap pembentangan untuk mendapatkan hasil perpotongannya. Setelah diameter pipa dipilih maka langkah pertama   pengerjaannya    adolah membagi  tiap  penampang    muka   dari  pipa  pertama   dan  kedua   menjadi   enam   bagian   untuk seperempat   lingkaran    dengan  besar  sudut yang  samo(l 5°),     kemudian  masing-masing   titik  dari penampang     depan    dan   penampang     samping     dihubungkan.      Langkah selanjutnya  ialah membentangkan setiap  pipa dimana  permukaan   silinder  lurus adalah  sama panjangnya   dengan keliling  lingkaran   (n x  garis  tengah)   dan  membaginya    menjadi   dua  puluh   empat    titik  dan dihubungkan  kembali  ke titik pertemuan   antara penampang  samping  dan penampang depan. Hasil dari analisa gambar  ini ditampilkan  berdasarkan  perpotongan   yang didapat.   Untuk mendapatkan garis   lengkung yang   mulus,  pergunakanlah    bidang proyeksi   sebanyak   mungkin dan  bidang proyeksi   ditempatkan  agak dekat  satu sama   lainnya. Kata Kunci :   Metode  Grafik,  Perpotongan,    Pembentangan,  Garis  proyeksi
Microcellulose From Pineapple Leaf Fiber as a PotentialSustainable Material: Extraction And Characterization Nawangsari, Putri; Fatra, Warman; Kusuma, Aryandi; Badri, Muftil; P.C1, Dedi Rosa; Masnur, Dedy
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4522

Abstract

Pineapple leaf fiber is consideredan agricultural waste during the harvesting process. Pineapple leaves are rich in cellulose, which made it applicable in many industrial applications. This study aims to extract and characterize microcellulose from pineapple leaf waste in Kampar district, Riau. Pineapple fibers were isolated by alkalization (5 % NaOH) at 70 ºC for 150 minutes, followed by bleaching treatment(3% H2O2) at 60°C for 60minutes. Microcellulosewascharacterized through various techniques, namely chemical composition analysis, Fourier transform analysis (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (DT/TGA). The results reveal that the extractedmicrocellulose has significantcellulose content (72.45%) with a crystallinity index of 73.48%. The FTIR spectra of microcellulose indicatethat alkalization and bleaching treatments removed lignin and hemicellulose in varying degrees. Moreover, the extracted microcelluloseshows high thermal stability, the maximum decompositionoccurredat 347 ºC (weight residue 16.37%).Pineappleleaf fiber in Kampar district, Riau, can be a source of microcellulose as a renewable, eco-friendly, and sustainable material for future industrial applications. 
Perancangan Kontroler Linear quadratic Regulator (LDR) Pada Sistem Suspensi Aktif untuk Mengontrol Gerak Vertikal Bodi Mobil Bukhari M Kasim
Jurnal POLIMESIN Vol 9, No 1 (2011): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v9i1.4

Abstract

Sebuah metode baru untuk menangani permasalahan aktif suspensi dilakukan dengan menambahkan motor listrik linear sebagai aktuator pada sistem suspensi. Keuntungan utama pemakaian motor listrik linear adalah dapat membangkitkan gaya aksi yang dibutuhkan unsprung mass dan sprung mass dari kenderaan, dapat mengisolasi dengan baik sprung mass kenderaan dari gangguan permukaan jalan. Dalam beberapa kondisi penggunaan motor listrik linear akan memberi peluang untuk mentransformasi energy mekanik menjadi energy listrik, dapat mengakumulasi energy tersebut dan dapat menggunakannya pada saat diperlukan. Penggunaan sistem aktif suspensi mempunyai dua alasan utama yaitu untuk meningkatkan kenyamanan berkenderaan dan meningkatkan kemampuan pengendalian kenderaan dalam merespon perubahan permukaan jalan. Kedua hal tersebut adalah kontradiktif dan tidak mungkin memenuhi keduanya kriteria tersebut secara simultan apabila hanya menggunakan jenis suspensi pasif Solusi dari permasalahan ini hanya bisa dilakukan dengan pemakaian jenis aktifsuspensi yang terintegrasi dengan sebuah kontroler. Sebuah kontrol suspensi aktive dari kendaraan di rancang dengan menggunakan metode Linear Quadratic Control (LQR). Hasil simulasi menunjukkan tingkat kenyamaman dan kemudahan pengendalian kenderaan dapat ditingkatkan secara bersamaan. Hal ini terukur dari pengurangan puncak serta semakin singkatnya waktu yang dibutuhkan oleh system suspensi untuk sampai pada posisi stabil setelah adanya gangguan.Keywords: aktif suspensi, linear motor, state space, Linear Quadratic Regulator.
Analisis struktur komputasional pemadat sampah plastik menggunakan Autodesk Inventor Nur Indah; Illiyas Widantoro Hendrawan
Jurnal POLIMESIN Vol 18, No 1 (2020): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i1.1354

Abstract

Persoalan sampah menjadi permasalahan di indonesia, karena berkaitan dengan pola hidup serta budaya masyarakat itu sendiri. Olehnya penanggulangan sampah bukan hanya urusan pemerintah semata akan tetapi penanganannya membutuhkan partisipasi masyarakat secara luas. Dalam hal penanganan sampah dapat diasumsikan bahwa laju produksi sampah tidak sebanding dengan proses  penanganann. Penelitian ini merupakan salah satu solusi atas keinginan untuk melakukan peningkatan terhadap proses penanggulangan sampah  di Perguruan Tinggi Swasta Universitas Mercubuana Jakarta melalui mesin pemadat sampah plastik. Penelitian ini bertujuan untuk membuat perancangan mesin pemadat sampah plastik dengan sistem kerja otomatis menggunakan PLC. Perancangan mesin pemadat sampah plastik ini menggabungkan beberapa cabang ilmu mekanika dan elektronika; mesin pemindah bahan, mekanika struktur, analisis motor dan teknikal kontrol. Keunggulan mesin pemadat sampah plastik dengan sistem kerja otomatis menggunakan PLC ini adalah mengurangi mobilitas kerja manusia dan lebih menitik beratkan kepada kinerja dari rangkaian alat yang ada pada mesin. Berdasarkan nilai tegangan von mises, faktor pergeseran, dan faktor keamanan dari pengujian komputasional, dan analisis momen pada perhitungan analitik dapat disimpulkan bahwa desain yang telah dibuat berada pada kondisi aman. Dengan nilai tegangan von mises memiliki nila terbesar  30,78 Mpa. Pergeseran memiliki nilai terbesar 0,02311 mm. Faktor keamanan bernilai 15 pada seluruh objek uji.Kata kunci: Sampah Plastik, Mesin Pemadat Sampah Plastik Otomatis, Desain, Pengujian Komputasional Analysis of computational structure of plastic waste compactors using Autodesk Inventor AbstractWaste problem is a problem in Indonesia, because it is related to the lifestyle and culture of the community itself. Therefore, waste management is not only a matter of government but its handling requires broad community participation. In the case of handling waste, it can be assumed that the rate of waste production is not proportional to the handling process. This research is one of the solutions to the desire to improve the process of tackling waste at the Private University of Mercubuana University Jakarta through a plastic waste compactor machine. This study aims to make the design of plastic waste compactor machines with automatic work systems using PLC. The design of this plastic waste compacting machine combines several branches of mechanics and electronics; material moving machinery, structural mechanics, motor analysis and technical control. The advantages of plastic garbage compactor machines with automatic work systems using PLC are to reduce the mobility of human work and focus more on the performance of the existing set of tools on the machine. Based on the von mises stress value, the shift factor, and the safety factor from computational testing, and moment analysis in analytical calculations it can be concluded that the design that has been made is in a safe condition. With von mises voltage values the largest value is 30.78 MPa. The shift has the largest value of 0.02311 mm. The safety factor is 15 for all test objects.
Implementation of rapid entire body assessment and anthropometry methods in conveyor design Nismah Panjaitan; Felica Felica
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3119

Abstract

The packaging station is one of the stations needed to produce the product. The workers in this station are still doing the process manually. The packaging station has several processes, namely the weighing process, the sewing process, and the moving process of the finished product by manually lofting the sack from the sewing machine to the pallet. The moving process has three activities holding, lifting, and moving. Workers who work manually often complain of pain felt while working, so they are at risk of experiencing musculoskeletal disorders. Accordingly, it is important to analyse the work posture to determine whether improvements must be made. The Rapid Entire Body Map (REBA) analyses the work position. Analysis of work posture is moving the product. The REBA method's posture assessment results are 8 for holding, 9 for lifting, and 10 for moving. From the results, it can be categorized as a high-risk level, and immediate improvements are needed. The improvements were made by designing a conveyor from the sewing machine to the pallet using the Anthropometric method with dimensions of 100cm, width of 65cm, and height of 113cm.
The effect of temperature, pressure, and grind size on Total Dissolved Solids (TDS) and extraction yield of semi-automatic espresso machines Winarso, Rochmad; Khoeron, Slamet; Wibowo, Rianto; Darmanto, Darmanto
Jurnal Polimesin Vol 22, No 3 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i3.4636

Abstract

The number of coffee shops in Indonesia has grown from 1,083 stalls in 2016 to over 2,937 booths in 2019, representing a threefold growth. Coffee shop establishments must provide two essential kinds of equipment: espresso machines, which use pressure, and filter machines, which employ infusion. The issue lies in the exorbitant cost and immense power requirements of semi-automatic and automated espresso machines, which necessitate the use of a manual espresso machine for commercial operations. The equipment can generate satisfactory espresso but encounters several challenges; specifically, the espresso generated is characterized by inconsistency, constantly varying in quality. This might arise due to the erratic nature of the manufacturing process. The two objectives of this study are: (1) to design an economically efficient semi-automatic espresso machine capable of producing products that meet the international quality standards set by the Specialty Coffee Association (SCA standard) and (2) to investigate the impact of critical factors such as pressure, temperature, and grind size, on the consistent quality of the resulting coffee (measured by Total Dissolved Solids (TDS) and extraction yield (EXT)). The research employs the Research and Development (RD) methodology. The research findings indicate that the optimal levels of Total Dissolved Solids (TDS) and extraction yield (EXT) may be attained by using a pressure setting of 8 bars, a temperature of 90ºC, and a grind size of 3.2 on the scale. The technique for optimizing the response resulted in Total Dissolved Solids (TDS) levels of 10.03% and extraction yield (EXT) values of 19.56%. The results have been deemed acceptable based on the criteria set by the global standards of Specialty Coffee Association (SCA).

Page 24 of 51 | Total Record : 503

 22   23   24   25   26 

Filter by Year

2003 2025


Reset
Filter By Issues
All Issue Vol 23, No 5 (2025): October Vol 23, No 4 (2025): August Vol 23, No 3 (2025): June Vol 23, No 2 (2025): April Vol 23, No 1 (2025): February Vol 22, No 6 (2024): December Vol 22, No 5 (2024): October Vol 22, No 4 (2024): August Vol 22, No 3 (2024): June Vol 22, No 2 (2024): April Vol 22, No 1 (2024): February Vol 21, No 6 (2023): December Vol 21, No 5 (2023): October Vol 21, No 4 (2023): August Vol 21, No 3 (2023): June Vol 21, No 2 (2023): April Vol 21, No 1 (2023): February Vol 20, No 2 (2022): August Vol 20, No 1 (2022): February Vol 19, No 2 (2021): Agustus Vol 19, No 1 (2021): February Vol 18, No 2 (2020): Agustus Vol 18, No 1 (2020): Februari Vol 17, No 2 (2019): Agustus Vol 17, No 1 (2019): Februari Vol 16, No 2 (2018): Agustus Vol 16, No 1 (2018): Februari Vol 15, No 2 (2017): Agustus Vol 15, No 1 (2017): Februari Vol 14, No 2 (2016): Agustus Vol 14, No 1 (2016): Februari Vol 9, No 1 (2011): Februari Vol 8, No 2 (2010): Agustus Vol 8, No 1 (2010): Februari Vol 7, No 2 (2009): Agustus Vol 7, No 1 (2009): Februari Vol 6, No 2 (2008): Agustus Vol 3, No 2 (2005): Agustus Vol 2, No 1 (2004): Februari Vol 1, No 1 (2003): Agustus More Issue