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All Journal AUSTENIT The IJICS (International Journal of Informatics and Computer Science) Jurnal Ekonomi International Journal of Research in Vocational Studies (IJRVOCAS) Buletin Utama Teknik El-Mal: Jurnal Kajian Ekonomi & Bisnis Islam

Wirda Novarika

Universitas Islam Sumatera Utara

Author-ID : 2770438

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Articles

PENGARUH PARAMETER PROSES RAPID PROTOTYPING DENGAN TEKNOLOGI STEREOLITHOGRAPHY TERHADAP KEKERASAN SPESIMEN UJI Wirda Novarika; Muchtar Ginting; Almadora Anwar Sani; Dicki Astra
AUSTENIT Vol. 11 No. 2 (2019): AUSTENIT 11022019
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Tujuan utama dari penelitian ini adalah untuk mengetahui kekerasan material resin spesimen roda gigi dengan menggunakan prameter berbeda. Pada proses pengujian ini penguji menggunakan alat uji kekerasan Brinnel (HB / BHN), yang menggunakan indentor bola baja ⌀5 mm dan P(Kg) 250 Kg. Hasil dari pengujian ini didapatkan bahwa pengaruh prameter Exposure Time berpengaruh terhadap kekerasan. Teknik pengumpulan data yang dilakukan dengan cara Studi Literatur, observasi dan Konsultasi. Dalam pengolahan data penelitian ini menggunakan metode analisis Statistical Anova.

Design Manufacture of Fixture Fire Fighter Kit Wirda Novarika; Fatahul Arifin; Eka Satria Martomi; Indra Gunawan; Fathur Raihan Perdana
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 3 (2021): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Forest fires are one that needs attention in Indonesia. Due to spent a lot of money to solve this problem. One of the tools to solve this problem is fire fighter, so in case is need to make the fixture can manufacture the fire fighter kit. In this study, we propose the fixture that can be produce the kit. It call fixture fire fighter kit. Autodesk inventor is applied in the simulation design and also it is considering with the ergonomic for the worker especially the Indonesian male. Finally, this tool can be resistant with load 50 kg, the deflection is 0.831 mm, and the maximum von misses stress is 34.12 MPa.

Study Leaf Spring for Punch in Press Tools Ahmad Zamheri; Azharuddin; Wirda Novarika
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 1 (2022): IJRVOCAS - April
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i1.93

The development of technology in the material sector is currently very fast, it can be seen from the many uses of metal materials, especially in the mass production industry with certain specifications, such as stainless steel, high carbon steel, and tool steel. Home industries such as the manufacture of rings, pans, bottle caps, stove components and others often use these materials as materials to make tools called press tools. In this press tool, high carbon steel or tool steel is mostly used as a punch, but as the cost and difficulty of these materials make home industries suffer big losses for the manufacture of production tools. For this reason, through this study the authors conducted experiments in the laboratory on recycle leaf spring materials. The experiment was carried out in four stages of testing, namely composition test, tensile test, hardness test, and microstructure test. The composition of elements of the recycle leaf spring are 0.6627% Carbon (C), 0.7304% Manganese (Mn), 0.0240% Sulfur (S), 0.0257% Phosphorus (P). The tensile strength of recycle leaf springs is 1332.5 kg/mm2. The hardness is carried out with the Rockwell C hardness test, the result of the test is 52.5 HRC. There are elements of martensitic and austenite in the microstructure test. The results of the laboratory experiments were compared with the data in the literature, so this recycle leaf spring material could be used as a substitute for cutting blades in press tools.

Implementation of Data Mining Using Naïve Bayes Classification Method To Predict Participation of Governor And Vocational Governor Selection In Jemirahan Village, Jabon District Arif Senja Fitrani; Fajrillah Fajrillah; Wirda Novarika
The IJICS (International Journal of Informatics and Computer Science) Vol 3, No 2 (2019): September 2019
Publisher : STMIK Budi Darma

General Election (ELECTION) is an important political event to determine a leader in a democratic country. The General Election (ELECTION) in East Java which was held on 27 June 2018 yesterday was the election of the Governor and Deputy Governor for the 2019-2024 period. There are two pairs of candidates for Governor and Deputy Governor. Through the General Election (ELECTION) then all parties can be accommodated what they want and aspire to so that a better life can be realized. The community is the determining component of the success or failure of an Election. Therefore, in this study the researcher wanted to examine how the electoral participation in Jemirahan Village, Jabon District by using the classification method, the Naïve Bayes algorithm. To predict the participation of the General Election (PEMILU) in Jemirahan Village, Jabon District, it can be done using the Naïve Bayes Algorithm with 6 predefined variables. The results of the prediction of election participation from the dataset taken were 300 data divided by 2, as many as 65% of 195 training data and 35% of 105 data testing.

CALCULATION MANAGEMENT OF PALM KERNEL LOSSES ON FIBER CYCLONE AT PT. HUTA BAYU MARSADA Mahrani Arfah; Wirda Novarika; Suliawati Suliawati
Jurnal Ekonomi Vol. 12 No. 01 (2023): Jurnal Ekonomi, 2023 Periode Januari - Maret
Publisher : SEAN Institute

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This research was conducted at PT. Huta Bayu Marsada especially on fiber cyclone units. To produce palm kernel products with good quality, the processing process is carried out as efficiently as possible, one of which is by preventing core losses. The problem in this study is to find out the total percentage of losses and the amount of palm kernel losses to the incoming feed on Fiber Cyclone at PT. Huta Bayu Marsada. Sampling was carried out for 6 (six) days from the fiber cyclone unit and analysis was carried out in the laboratory for 4 (four) components, namely fiber, intact core, broken core, and core + shell. Samples were taken as much as + 1000 grams at 13.00 WIB - 15.00 WIB. The sample is cyclone fiber waste and analysis of core losses from cyclone fiber is carried out in the factory laboratory. The results of the study showed losses of palm kernel on fiber cyclone at PT. Huta bayu marsada for 6 consecutive days is 0.835%; 0.823 %; 0.785 %; 0.732 %; 0.862% and 0.894% which are still in accordance with the standards at this factory, namely ≤ 1.02%. The difference in the results of the sample components is due to the different sample sizes. Factors affecting palm kernel losses in the Fiber Cyclone process are caused by fruit maturity, harvest phase and air velocity on the specific gravity of the sample. The largest number of palm kernel losses occurred on the sixth day of 518.4668 kg, this was influenced by the total % LossesThe largest number of palm kernel losses occurred on the sixth day of 518.4668 kg, this was influenced by the total % Losses. The amount of palm kernel loss to incoming feed is getting bigger because of its thin and flat shape which makes it easy to lift up and causes losses to increase.

POTENSI KERUGIAN EKONOMI AKIBAT KEHILANGAN MINYAK PADA LIMBAH CAIR DI UNIT SLUDGE SEPARATOR DI PTPN IV KEBUN ADOLINA PERBAUNGAN Indri Stephani Manalu; Siti Rahmah Sibuea; Wirda Novarika
Buletin Utama Teknik Vol 18, No 3 (2023): Edisi Mei
Publisher : Universitas Islam Sumatera Utara

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Kehilangan minyak pada limbah cair di sludge separator tidak dapat dihindari, jika kehilangan minyak melebihi norma yang telah ditetapkan akan memberikan potensi kerugian. Limbah kelapa sawit adalah sisa-sisa hasil tanaman kelapa sawit yang tidak termasuk dalam produk utama atau merupakan hasil sampingan dari proses pengolahan kelapa sawit. Tujuan dari penelitian ini adalah untuk mengetahui potensi kerugian akibat kehilangan minyak pada limbah cair unit sludge separator. Penelitian ini dilakukan di PTPN IV Kebun Adolina, Perbaungan, Sumatera Utara. Hasil penelitian ini adalah losses yang terdapat pada limbah cair selama bulan September - November 2022 ada beberapa yang melebihi standart pabrik yaitu maksimal 0,60%, hal ini disebabkan karena jam operasional sludge separator sudah tinggi sehingga losses yang dihasilkan tinggi.

STRATEGI PENGEMBANGAN USAHA MENGGUNAKAN PENDEKATAN BISNIS MODEL CANVAS STUDI KASUS IKM TAHU SALJU DI NIAS SELATAN Agung Arifman Vau; Wirda Novarika; Mahrani Arfah
Buletin Utama Teknik Vol 18, No 3 (2023): Edisi Mei
Publisher : Universitas Islam Sumatera Utara

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IKM Tahu Salju di kota Teluk Dalam dirintis sejak tahun 2016. IKM Tahu Salju memiliki peluang besar dan mulai berkembang, maka perlu dilakukan strategi pengembangan usaha. Penelitian ini bertujuan untuk menentukan strategi alternatif untuk merancang model bisnis yang baru menggunakan metode pendekatan Business Model Canvas.Penelitian ini menggunakan kombinasi pendekatan Business Model Canvas, matriks Strengths, Weakness, Opportunities, dan Threats (SWOT) untuk merumuskan strategi perbaikan dan pengembangan IKM Tahu Salju. Hasil penelitian berdasarkan matriks Internal Faktor Evaluation(IFE) dan Eskternal Faktor Evaluation (EFE) menghasilkan matriks Internal-Eksternal (IE) dapat dilihat bahwa posisi IKM Tahu Salju berada pada sel V. Jika suatu perusahaan berada pada sel III, V, VII dapat digambarkan bahwa perusahaan (guard dan maintain). Guard and Maintain strategy menunjukkan perusahaan membutuhkan strategi pengembangan produk dan penetrasi pasar. Dari hasil analisis SWOT pada IKM Tahu Salju memiliki nilaimatriksInternal Faktor Evaluation(IFE) 2,84 dan nilai matriks Eskternal Faktor Evaluation(EFE) 2,69. Kondisi Business Model Canvas pada IKM Tahu Salju terdiri dari, Customer Segment, Value Proposition, Channel, Customer Relationship, Revenue Stream, Key Resource, Key Activity, Key Partners, Cost Structure.

STUDI PERAMALAN JUMLAH PENUMPANG ARMADA BUS MEDAN JAYA DENGAN MENGGUNAKAN PEMULUSAN (SMOOTHING) EKSPONENSIAL GANDA METODE DUA PARAMETER DARI HOLT DI PT. MEDAN JAYA Muhammad Qodri Ramadhan Harahap; Wirda Novarika; Tri Hernawati
Buletin Utama Teknik Vol 18, No 3 (2023): Edisi Mei
Publisher : Universitas Islam Sumatera Utara

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Peramalan merupakan bagian integral dari kegiatan pengambilan keputusan manajemen dalam menentukan sasaran dan tujuan. Berusaha menganalisis faktor-faktor lingkungan, peramalan menjadi lebih ilmiah sifatnya dalam menghadapi lingkungan manajemen, karena setiap bagian organisasi berkaitan satu samalain, baik buruknya peramalan dapat mempengaruhi seluruh bagian organisasi. perhitungan jumlah penumpang dengan menggunakan metode eksponensial yang diterapkan dalam penelitian ini adalah dengan menggunakan metode eksponensial ganda dua parameter dari Holt. Untuk melakukan peramalan maka harus diperoleh data dari tahun sebelumnya. Jika dibandingkan dengan data aktual jumlah penumpang bulan Januari 2021 sampai dengan Juli 2022 dengan hasil peramalan bulan Juli tahun 2023 terjadi kenaikan jumlah penumpang Bus sekitar 15.498 penumpang. Peramalan ini dilakukan untuk mengetahui seberapa besar jumlah penumpang yang menggunakan Bus Medan Jaya selama setahun kedepan.Agar tidak terjadinya penurunan penumpang maka perlu dilakukannya evaluasi atau peneliti selanjutnya. Dan kebijakan yang perlu dilakukan PT.Medan Jaya harus membuka kantor pelayanan atau tempat pengambilan tiket yang mudah dijangkau oleh masyarakat agar penurunan jumlah penumpang dapat diatasi secara Optimal.

Analisis Pengukuran Produktivitas Menggunakan Metode Pendekatan Objective Matrix (OMAX) pada Proses Pengolahan Air Bersih di PT. Dain Celicani Cemerlang KIM III Mabar Wirda Novarika; Suliawati; Fachrun Fikriyyah
El-Mal: Jurnal Kajian Ekonomi & Bisnis Islam Vol. 5 No. 4 (2024): El-Mal: Jurnal Kajian Ekonomi & Bisnis Islam
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/elmal.v5i4.876

This research aims to measure the productivity level using the objective Matrix (OMAX) approach method based on raw material usage data, available operator hours data, and operator hours data. As well as determining the causes of decreased productivity using a cause-and-effect diagram (Fishbone Diagram). Based on the calculation of the productivity index for the period from January to June 2022, it was 39.89%. While the highest productivity occurs in May with a value of 480 and the lowest productivity is in March with a total yield of 116. Based on the achievement of the lowest productivity ratio score is found in ratio 2, namely, labour productivity with a total score of 15 and the lowest total score is in January, March and May. Changes in performance values indicate that the level of productivity is not yet good, it is necessary to improve the factors that influence it. The causal diagram shows that the machine damage factors also affect the operator’s working hours, which become ineffective. In terms of productivity, we must require pretty good machine maintenance so that production can run smoothly and machine maintenance on a regular basis. The workforce greatly influences the occurrence of low productivity due to inexperienced and unskilled operators and sufficient training for operators must be needed to increase the productivity of the company. Keywords: Objective Matrix (OMAX), Productivity, Clean Water.

Co-Authors Agung Arifman Vau Ahmad Zamheri Almadora Anwar Sani Arif Senja Fitrani Azharuddin Dicki Astra Eka Satria Martomi Fachrun Fikriyyah Fajrillah Fajrillah Fatahul Arifin Fathur Raihan Perdana Indra Gunawan Indri Stephani Manalu Mahrani Arfah Muchtar Ginting Muhammad Qodri Ramadhan Harahap Siti Rahmah Sibuea Suliawati Suliawati Suliawati Tri Hernawati

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