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Khairuddin Tampubolon
Universitas Pembinaan Masyarakat Indonesia
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Analisis Penggunaan Knalpot Berbahan Komposit Untuk Mengurangi Tingkat Kebisingan Pada Motor Suzuki Satria khairuddin tampubolon; Fider Lumbanbatu
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol 4, No 2 (2020): EDISI DESEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v4i2.4065

Abstract

Pertambahan jumlah penduduk sejalan dengan pertambahan jumlah Produksi dan Pemakaian kendaraan bermotor. Selain meningkatnya penggunaan Sepeda motor baru, tidak sedikit Sepeda motor bekas dan bahkan Sepeda motor kategory Sepeda motor tua masih dipakai. Menurut pengamatan Peneliti hal ini telah menimbulkan sejumlah permasalahan, diantaranya: sumber kebisingan atau polusi suara. kemudian terjadinya Polusi  Udara akibat gas buang dan pemakaian bahan bakar lebih, karena penggunaan Sepeda motor bekas category tua. Keadaan ini berlangsung terus menerus mungkin tanpa mereka sadari dampaknya, dapat kita lihat Setiap keluarga kebanyakan mempunyai sepeda motor 2 atau 3 buah. Padahal alternatif lain masih ada yaitu dengan menggunakan angkutan umum. Melihat fenomena ini Peneliti tertarik melakukan penelitian dengan tujuan: 1.Menganalisis tingkat kebisingan yang ditimbulkan Sepeda Motor, 2.Menganalisis Emisi Gas Buang Sepeda Motor, 3. Menganjurkan Pemakaian Knalpot berbahan Komposit untuk Mengurangi kebisingan, 4.Menganalisis pengaruh penggunaan Knalpot bahan Komposit pada Sepeda Motor terhadap penggunaan bahan bakar. Penelitian ini dilakukan diWorkshop Kampus UPMI Medan dan sebagai objeknya adalah Knalpot Sepeda Motor Suzuki Satria sedangkan proses analisis tingkat Kebisingan dan Test Emisi Gas Buangnya dilakukan di Laboratorium Teknik Universitas Sumatera Utara Medan. Penelitian ini menggunakan metode eksperimental, yaitu suatu penelitian yang berusaha mencari pengaruh variabel tertentu terhadap variabel yang lain dalam kondisi terkontrol secara total. Dari hasil penelitian diperoleh: 1. Perbandingan tingkat kebisingan knalpot pada rpm 1000, terjadi penurunan kebisingan yaitu: 10,52 %, 2. Sedang Perbandingan tingkat kebisingan knalpot pada putaran 4000 rpm, terjadi penurunan kebisingan sebesar : 5.22 %. Luaran penelitian ini akan dipubikasikan ke Jurnal Terakreditasi (SINTA), sedangkan Tingkat Kesiapterapan Teknologinya berupa: 1. Referensi Penggunaan Knalpot berbahan Komposit, 2. Data hasil penelitian tentang Analsis Polusi  Suara.
Pengaruh Campuran Silikon Pada Aluminium Terhadap Kekerasan Dan Tingkat Keausannya Wispi Elbar; khairuddin tampubolon
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol 4, No 2 (2020): EDISI DESEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v4i2.4070

Abstract

Salah satu Faktor penentu kekeran dan keuletan Logam yaitu dari proses pemotongannya sebab proses pemotongan logam merupakan suatu proses yang digunakan untuk mengubah bentuk dari logam (komponen mesin) dengan cara memotong. Proses pemotongan dengan menggunakan pahat potong yang dipasang pada mesin perkakas Komponen mesin yang terbuat dari logam mempunyai bentuk yang beraneka ragam. Umumnya dibuat dengan proses permesinan dari bahan yang berasal dari proses penuangan (casting) atau proses pengolahan bentuk (forming). Karena bentuknya yang beraneka ragam tersebut maka proses permesinan yang dilakukannya pun bermacam-macam sesuai dengan bidang yang dihasilkan yaitu silindrik atau rata dan ini akan berpengaruh terhadap kekuatan logam. Begitupun dengan bahan campurannya yang harus diuji lagi dan disesuikan dengan kegunaannya. Sehubungan dengan hal tersebut peneliti tertarik melakukan penelitian dengan tujuan: 1. Untuk Mengetahui pengaruh gaya potong pada kekerasan Aluminium, 2.Untuk Mengetahui pengaruh gaya potong pada keausan Aluminium, 3.Untuk Mengetahui Tingkat Kekerasan Aluminium setelah ditambah Silikon, 4.Untuk Mengetahui Tingkat Keausan Aluminium setelah ditambah Silikon. Penelitian ini dilakukan di Laboratorium teknik mesin Growth Center LLDikti Wil 1 Sumut Medan, Adapun objek penelitian ini adalah Material Aluminium 6061 dan Silikon, Penelitian ini menggunakan metode eksperimental, yaitu suatu penelitian yang berusaha mencari pengaruh variabel tertentu terhadap variabel yang lain dalam kondisi terkontrol secara total. Hasil penelitian ini akan dipubikasikan ke Jurnal Terakreditasi (SINTA), sedangkan Tingkat Kesiapterapan Teknologinya berupa: Data hasil penelitian.
Pengaruh Unsur Fe dan Penambahan Grain Refiner Al-5TiB Terhadap Morfologi Fasa Intermetalik dan Sifat Mekanis Pada Paduan Zamak 3 Surya Irawan; Khairuddin Tampubolon
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol 5, No 2 (2021): EDISI DESEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v5i2.4629

Abstract

In general, in the hot chamber diecasting industry the use of scrap gating and machining has never been optimally used for recycling so that it can become raw material. This is due to the presence of iron impurities (Fe) forming an intermetallic phase which is dissolved into the Zn-Al alloy which can be seen in its microstructure. So that problems arise that will result in defects in the castings and reduce the mechanical properties of the castings. This study aims to determine the effect of adding Al-5TiB modifier as a grain refiner in changing the morphology of the intermetallic phase of the alloy. This research was conducted at the Department of Metallurgy and Materials, FTUI, Depok and the objects were Zinc-Aluminum Zamak 3 and several other supporting metals. This study uses an experimental method. The results of the investigation show that the effect of impurities through the addition of iron (Fe) 0.04% and 0.19% can lead to an increase in the intermetallic phase fraction at the grain boundaries which causes a decrease in tensile strength, impact, and fluidity in Zinc - Aluminum alloys. The addition of 0.5% and 1% Al-5TiB grain refiner to the Zamak 3 master alloy with 0.19% iron (Fe) content resulted in an increase in the mechanical properties and fluidity values of the alloy. This is due to the formation of an intermetallic phase which is more uniformly distributed over the finer grain boundaries.
ANALISIS PERBANDINGAN EFISIENSI KERJA MESIN BENSIN PADA MOBIL TAHUN 2000 SAMPAI TAHUN 2005 DAN MOBIL TAHUN 2018 SERTA PENGARUH TERHADAP KONSUMSI BAHAN BAKAR DAN CARA PERAWATANNYA SEBAGAI REKOMENDASI BAGI KONSUMEN khairuddin tampubolon; Faimal Rivai Koto
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol 3, No 2 (2019): EDISI DESEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v3i2.2773

Abstract

Pengetahuan Masyarakat umum tentang mesin mobil bekas dan mobil baru sangat rendah. Sehingga peneliti tertarik melakukan penelitian dengan tujuan: 1. Untuk menganalisis besarnya efisiensi kerja mesin mobil bensin Tahun 2000 s/d Tahun 2005 dan mobil  Tahun 2018 serta pengaruh terhadap konsumsi bahan bakar dan cara perawatannya. 2. Memberikan kontribusi kepada konsumen tentang Efisiensi kerja Mesin mobil bensin bekas dan mobil bensin baru, serta pengaruh terhadap bahan bakar dan cara perawatannya. Subjek dalam penelitian ini adalah mesin mobil bensin bekas tahun 2000 sampai dengan 2005 dan mesin mobil bensin baru 2018. Sebagai mitra adalah PT Astra International tbk Daihatsu Jl..M.Raja no.170 Medan. Setelah melakukan survey lokasi, verifikasi izin, waktu dan jadwal penelitian, kemudian akan dilakukan Pengumpulan data dengan metode komparatif melalui pengujian variabel dan membandingkannya dengan angka korelatif indekx “r”. Luaran penelitian ini yaitu: 1. Akan dikirim ke salah satu jurnal nasional Terakreditasi . 2. Dijadikan buku Ajar . 3. Dipublikasikan ke Media cetak lokal. Sedangkan Tingkat Kesiapterapan Teknologinya berupa data hasil penelitian yang akan memberikan kontribusi terhadap konsumen.
Perancangan Sepatu Kuda Berbahan Dasar Polymeric Foam dan Diperkuat dengan Fiber Glass Fider Lumbanbatu; Surya Irawan; Khairuddin Tampubolon
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 6 No. 2 (2022): Edisi Desember 2022
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v6i2.6707

Abstract

This study aims to obtain the best design and material for horseshoes. The research method used is experimental and research target design. This research was conducted in Medan and most of the experiments were conducted at USU University Medan. The results of this research are: it is known that horse shoes will be better if they are made using polymeric foam and reinforced with glass fiber. Furthermore, it was found that other advantages of horseshoe material made of polymeric foam reinforced fiberglass when compared to low carbon mild steel A 36 material, namely: a) Light weight, so it does not burden the horse's feet. b) Flexible, so it can adjust to the horse's hooves. c) Soft, so it can reduce the risk of injury. Horseshoe made of iron, when the horse is moving, if it hits a hard surface, it can cause a reaction force that over time can damage the horse's hooves, the joints of the horse's legs and even the horse's feet, if used for a long time. d) Resistant to chemicals found in the horse's environment, for example horse urine contained in horse stables, where horse urine contains ammonia, and is mixed with other harmful substances. e) Not slippery, thus preventing the horse from slipping and reducing the risk of injury.
THE INFLUENCE OF EDUCATIONAL ADMINISTRATION ON TEACHER PERFORMANCE AT SMA NEGERI 1 SERBAJADI, SERBAJADI DISTRICT, DELI SERDANG REGENCY Ramadha Yanti Parinduri; Khairuddin Tampubolon; Barham Siregar
International Journal of Educational Review, Law And Social Sciences (IJERLAS) Vol. 3 No. 1 (2023): January
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijerlas.v3i1.603

Abstract

The effect of educational administration on teacher performance at SMA Negeri 1 Serbajadi according to the hypothesis and from the observations of researchers is quite significant. This study aims to determine how much influence the educational administration has had on teacher performance at SMA Negeri 1 Serbajadi. This research method uses quantitative research methods. The sample is teachers at SMA Negeri 1 Serbajadi, a total of 37 people. The data processing method was carried out using SPSS software version 26. The results of the study: 1) From the results of the t test analysis, it is known that the sig. for the effect of the independent variable Education Administration on the dependent variable Teacher Performance is: 0.006 <0.05 and the t-count value is 3.526 > t table 2.026 so that it can be concluded that H is accepted, meaning that there is an influence of the independent variable Education Administration on the dependent variable Teacher Performance. 2) the output of the F test is known to be the sig. for the independent variables of Education Administration and other external elements simultaneously on the dependent variable Teacher Performance is 0.006 <0.05 and the calculated F value is 22.330 > F table 4.08, so it can be concluded that Ha is accepted means that there is influence of the Education Administration variables and other external elements simultaneously on teacher performance variable. 3) Based on the test results of the coefficient of determination (R2) it is known that the value of R Square is 0.862,
THE INFLUENCE OF SUPERVISORY WORK MOTIVATION AND COMPETENCE ON THE PERFORMANCE OF SCHOOL SUPERINTENDENTS IN PADANGSIDIMPUAN CITY EDUCATION OFFICE Khairuddin Tampubolon; Elazhari; Nunti Sibuea
International Journal of Educational Review, Law And Social Sciences (IJERLAS) Vol. 3 No. 1 (2023): January
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijerlas.v3i1.604

Abstract

The background of this research is related to the performance of school supervisors. School supervisors are ASNs who are one of the school administrative staff assigned to their respective work areas. Permen PAN and RB no. 21 of 2010 article 5 explains that the main duties of school supervisors themselves consist of carrying out academic and managerial supervisory duties in education units. With regard to the main tasks carried out by a school supervisor, of course it is not too much to say that the barometer of national education quality is determined by the level of competence of a school supervisor. Based on the background of the problems above, the problems identified in this study are as follows: 1) The role of school supervisors is not optimal in carrying out supervisory duties and functions, 2) The intensity of attendance of supervisors at target schools is still lacking, 3) Supervisors who come to schools tend to only carry out aspects of managerial supervision while other aspects are given little attention, 4) School supervisors rarely conduct class visits and provide direct guidance to teachers. In addition, school supervisors are considered to be lacking in providing guidance related to educational research. This research uses a quantitative approach. This research was conducted in the Padangsidimpuan City Education Office, on Jl. AH Nasution No. 97 Pijorkoling Padangsidimpuan. carried out from May 2021 to July 2021. with a population of 49 people, data collection techniques were carried out by observing, interviewing and distributing questionnaires/questions. Furthermore, the data were analyzed using SPSS Software Version 26. Based on the results of the study, it was concluded that: 1) The effect of work motivation on supervisory performance is: 67.1%; 2) the influence of Supervisory Competence on Supervisory Performance is: 64.4%; 3) The simultaneous influence of work motivation and competence of supervisors on supervisory performance is 65.6%.
ZOMBIE COMPANIES IN THE CONTEXT OF STATE- OWNED ENTERPRISES IN INDONESIA Elazhari Elazhari; Khairuddin Tampubolon; Barham Siregar; Ramadha Yanti Parinduri; Boby Indra Prayoga
International Journal of Artificial Intelligence Research Vol 6, No 1.1 (2022)
Publisher : International Journal of Artificial Intelligence Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29099/ijair.v6i1.1.785

Abstract

This paper discusses “zombie” companies in the context of state- owned companies in Indonesia. Specifically, we will examine the factors that determine them to become a “zombie” company. In addition, we will examine the impact of their existence on the economy. Using a sample of 159 Indonesian state-owned companies from 2010 to 2020, we find that Indonesian state-owned companies are indicated to have zombie companies. Their existence is significantly determined by internal factors rather than external factors. Dominant external factors are significant when tested simultaneously with internal factors. In addition, we also find that their presence has a significant negative impact on economic growth and national productivity. Therefore, the government, as well as controlling the company, is expected to be able to immediately overcome their existence, which can be done by restructuring the company or if possible liquidating them. Their existence not only harms themselves, but also harms other companies, and can even harm the national economy.
Pengaruh Motivasi dan Gaya Kepemimpinan Kepala Sekolah Terhadap Kinerja Guru di SMP Negeri 2 Tanjung Balai Elazhari Elazhari; Khairuddin Tampubolon; Barham Barham; Ramadha Yanti Parinduri
All Fields of Science Journal Liaison Academia and Sosiety Vol 1, No 1: Maret 2021
Publisher : Lembaga Komunikasi dan Informasi Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (856.892 KB) | DOI: 10.58939/afosj-las.v1i1.308

Abstract

Penelitian ini menggunakan pendekatan kuantitatif dengan mengkaji fakta-fakta yang telah terjadi serta semua data dan informasi diwujudkan dalam bentuk angka,dengan analisis statistik parametrik dengan menggunakan Software SPPS versi 11. Adapun hasil penelitian ini berdasarkan hasil analisis regresi sederhana, menunjukkan bahwa: 1) Variabel motivasi kerja (X1) mempunyai pengaruh positif terhadap kinerja guru (Y), dengan kontribusi yang diberikan sebesar 74,8%. Pengaruh positif tersebut menunjukkan bahwa semakin baik motivasi kerja (X1), maka kinerja guru (Y) juga semakin baik. 2) Pengujian regresi sederhana antara gaya kepemimpinan (X2) mempunyai pengaruh positif terhadap kinerja guru (Y), dengan kontribusi yang diberikan sebesar 58,4%. Pengaruh positif tersebut menunjukkan bahwa semakin baik kepemimpinan (X2), maka kinerja guru (Y) juga semakin baik. 3) Hasil pengujian koefisien determinasi menunjukkan bahwa kinerja guru dapat dijelaskan oleh variabel motivasi kerja (X1), dan kepemimpinan (X2) sebesar 66,3%. Sedangkan selebihnya yaitu 33,7% kinerja guru (Y) dapat dijelaskan oleh variabel selain yang tidak diteliti. Kata Kunci: Pengaruh; Motivasi; Gaya Kepemimpinan; Kepala Sekolah; Kinerja Guru.
Peran Perilaku Guru dalam Menciptakan Disiplin Siswa Khairuddin Tampubolon; Nunti Sibuea
All Fields of Science Journal Liaison Academia and Sosiety Vol 2, No 4: Desember 2022
Publisher : Lembaga Komunikasi dan Informasi Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (770.027 KB) | DOI: 10.58939/afosj-las.v2i4.467

Abstract

Tujuan penulisan ini untuk memberikan uraian bahwa perilaku guru berperan dalam menciptakan disiplin siswa. Adapun hasil yang diuraikan diketahui perilaku guru dalam kedisiplinan dan diimplementasikan pada saat melaksanakan proses belajar mengajar akan dapat memberikan contoh kepada siswa sehingga akan membentuk siswa yang disiplin, sebab sifat dasar siswa adalah menjadikan guru sebagai panutannya. Adapun perilaku guru yang perlu menjadi dasar penerapan disiplin yang akan memberikan contoh kepada siswa yaitu: 1) Disiplin dalam Kehadiran, 2) Disiplin dalam melaksanakan aturan sekolah, 3) Berpakaian rapi, bersih dan sopan, 4) Mampu mengendalikan diri dalam mengatasi permasalahan, 5) Menciptakan hubungan kekeluargaan antara sesama, 6) Berempati, 7) Bertutur kata dan bersikap sopan santun, 8) Selalu menjaga kesesuaian antara perkataan dengan perbuatan, 9) Tidak pernah bosan membimbing siswa agar selalu disiplin dalam belajar dan mengikuti aturan yang ada. Kata Kunci : Perilaku; Guru; Disiplin; Siswa.
Co-Authors Ahmad Karim Ahmad Karim Aidil Fithrah Ali Mukti Tanjung ALINUR . Ardi Ermawy Ardy Ermawy Barham Siregar Boby Indra Prayoga Elazhari Elazhari Elazhari Elazhari Elisabeth Sitepu Faimal Rivai Koto Fider Lumban Batu Fider Lumbanbatu Hetty Elfina Julian Julian Khairul Saleh M. Ali Musri S Manurung, Ridho Syahputra Marihot Manullang Muhammad Ali Musri S Muhammad Razali Nunti Sibuea Pangeran Pangeran Ramadha Yanti Parinduri Reza Hanafi Lubis Suhelmi Suhelmi Surya Irawan Surya Irawan Surya Irawan Wispi Elbar Yuanita Yuanita Zulkifli Zulkifli