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All Journal Bulletin of Electrical Engineering and Informatics SITEKIN: Jurnal Sains, Teknologi dan Industri CESS (Journal of Computer Engineering, System and Science) Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat JITK (Jurnal Ilmu Pengetahuan dan Komputer) Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika Al-Irsyad: Jurnal Pendidikan dan Konseling CCIT (Creative Communication and Innovative Technology) Journal Jurnal Mantik Journal of Intelligent Decision Support System (IDSS) Journal of Research in Mathematics Trends and Technology Bahtera Inovasi Jurnal SAINTIKOM (Jurnal Sains Manajemen Informatika dan Komputer) FARABI: Jurnal Matematika dan Pendidikan Matematika
Sutarman Sutarman
Department Of Mathematics, Universitas Sumatera Utara, Medan, 20155, Indonesia
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Social Sciences Other

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Dampak Perubahan Tick Size Terhadap Likuiditas Saham (Studi Empiris pada Bursa Efek Indonesia Berdasarkan Tick Size 6 Januari 2014) Risdy Absari Indah Pratiwi; Isfenti Sadalia; Sutarman Sutarman
Bahtera Inovasi Vol 2 No 2 (2019): Jurnal Bahtera Inovasi
Publisher : Program Studi Manajemen Fakultas Ekonomi UMRAH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/bi.v2i2.1628

Abstract

The objective of the research was to find out and to analyze the influence of the change in tick size on stock liquidity and the factors which influenced stock liquidity. Tick size which became the research object in this evet study was the tick size on January 6, 2014. The sources of data were secondary data from BEI and Yahoo Finance. The samples were 147 stocks before the change in tick size and 147 stocks after the change in tick size, using purposive sampling technique.The data were analyzed by using Wilcoxon signed-rank test and regression analysis with an SPSS software program. The result of the research showed that spread and depth decreased significantly after the change in tick size. Lower spread and depth had contradictory implication on stock liquidity. Based on the dimension of immediacy cost and width, lower spread indicated that stock liquidity increased, while based on the dimension of market depth, lower depth indicated that stock liquidity decreased. In order to settlethis contradiction, the researcher used depth to spread ratio. Intuitively, this ratio measured whether the decrease in depthwas bigger or smaller that the decrease in spread. The result of Wilcoxon signed-rank test indicated that depth to spread ratio increased significantly which indicated that the decrease in depth was smaller than in spread so that it was concluded that stock liquidity increased after the change in tick size. The result of F-test showed that stock price, stock return volatility, and stock trading frequency simultaneously had significant influence on spread and depth. The result of t-test also indicated that stock price, stock return volatility, and stock trading frequency partially had significant influence on spread and depth.
ANALISIS DAN EVALUASI STRATEGI BERSAING DALAM UPAYA PENINGKATAN VOLUME PENJUALAN SEPEDA MOTOR HONDA DI WILAYAHSUMATERA UTARA (STUDI KASUS: MAIN DEALER SEPEDA MOTOR HONDAWILAYAH SUMATERA UTARA CV. INDAKO TRADING CO. JL. PEMUDA NO. 18 DEFGH, MEDAN) JefrY Sudono Halim; Rismayani .; Sutarman .
Al-Irsyad: Jurnal Pendidikan dan Konseling Vol 5, No 2 (2015): Edisi Juli-Desember 2015
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/al-irsyad.v5i2.6544

Abstract

Strategies are being made to increase the volume of sales of Honda motorcyclesin 2013 of raising consumer awardness to Honda through an ad campaign. Viewed fromthe strategy that has been implemented in 2013, the sales unit has not reached thepredetermined targets, but seen from the market share has increased (seize the marketshare of competitors). Realized sales from the year 2009-2011 increased volume salesof Honda motorcycles, while from 2011- 2013 year decline in sales volume Hondamotorcycles. The purpose of this study was to determine the effect of variable brands,design, features, quality, price, sale, resale value, and after-sales service to variableinterest of consumers simultaneously and partially and competitive strategy that iseffective to increase the volume of sales of the Honda Motorcycle in North Sumatra.Keywords: Minat Konsumen, Strategi Bersaing, Volume Penjualan.
STRATEGI DALAM MENINGKATKAN PERTUMBUHAN DEBITU SMALL MEDIUM ENTERPRISE BANK CIMB NIAGA CABANG MEDAN BUKIT BARISAN Afrizal .; Iskandarini .; Sutarman .
Al-Irsyad: Jurnal Pendidikan dan Konseling Vol 5, No 2 (2015): Edisi Juli-Desember 2015
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/al-irsyad.v5i2.6545

Abstract

The strategy set by Bank CIMB Niaga in promoting growth Debtor Small MediumEnterprise Branch Medan Bukit Barisan up to date has focused on the application ofexcellent service to attract customers and prospective debtor as a partner in apartnership. However it is felt not to be able to make the maximum contribution inincreasing the number of Debtors Branch Medan Bukit Barisan so diada-kan need aresearch study to find additional strategies in doubt-sanaannya signifikant able to giveeffect to this increase SME Debtor Bank CIMB Niaga. In the Division of Small MediumEnterprise [SME] Bank CIMB Niaga Medan Bukit Barisan, loan products as one of themajor and mainstay products decreased Debtor growth in 2010 and 2011.Keywords: Strategi, Debitu Small Medium Enterprise, Bank Cimb Niaga.
Estimation of Heteroskedasticity Semiparametric Regression Curve Using Fourier Series Approach Rahmawati Pane; Sutarman; Andi Tenri Ampa
Journal of Research in Mathematics Trends and Technology Vol. 2 No. 1 (2020): Journal of Research in Mathematics Trends and Technology (JoRMTT)
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jormtt.v2i1.3744

Abstract

A heteroskedastic semiparametric regression model consists of two main components, i.e. parametric component and nonparametric component. The model assumes that any data (x̰ i′ , t i , y i ) follows y i = x̰ i′ β̰+ f(t i ) + σ i ε i , where i = 1,2, … , n , x̰ i′ = (1, x i1 , x i2 , … , x ir ) and t i is the predictor variable. Parameter vector β̰ = (β 1 , β 2 , … , β r ) ′ ∈ ℜ r is unknown and f(t i ) is also unknown and is assumed to be in interval of C[0,π] . Random error ε i is independent on zero mean and varianceσ 2 . Estimation of the heteroskedastic semiparametric regression model was conducted to evaluate the parametric and nonparametric components. The nonparametric component f(t i ) regression was approximated by Fourier series F(t) = bt + 12 α 0 + ∑ α k ???? ???????? kt Kk=1 . The estimation was obtained by means of Weighted Penalized Least Square (WPLS): min f∈C(0,π) {n −1 (y̰− Xβ̰−f̰) ′ W −1 (y̰− Xβ̰− f̰) + λ ∫ 2π [f ′′ (t)] 2 dt π0 } . The WPLS solution provided nonparametric component f̰̂ λ (t) = M(λ)y̰ ∗ for a matrix M(λ) and parametric component β̰̂ = [X ′ T(λ)X] −1 X ′ T(λ)y̰
DETEKSI DAN KOREKSI MULTI BIT ERROR DENGAN PARTITION HAMMING CODE Fajar Muhajir; Syahril Efendi; Sutarman Sutarman
Jurnal Teknovasi : Jurnal Teknik dan Inovasi Vol 3, No 2 (2016): Teknovasi Oktober 2016
Publisher : LPPM Politeknik LP3I Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55445/teknovasi.v3i2.64

Abstract

Mengirimkan data dari pengirim ke penerima merupakan salah satu bentuk komunikasi. Data dapat dikirim menggunakan saluran nirkabel ataupun saluran kabel, pada saat proses data dikirimkan dapat terjadi error yang disebabkan oleh saluran yang bising. Error yang terjadi dapat merusak data yang dikirim, error tersebut dapat berupa single bit error atau multi bit error. Error dapat diperbaiki dengan menerapkan error control coding. Hamming code merupakan salah satu contoh teknik error control coding yang dapat mendeteksi dan mengkoreksi error. Pada penelitian ini dianalisa metode untuk mendeteksi dan mengkoreksi multi bit error pada pesan yang dikirimkan menggunakan partition hamming code. Sebelum data dikirim ke penerima, pengirim membuat pola partition bit pesan yang lebih kecil dari hamming code (7,4) dan menambahkan bit parity dalam semua blok pesan yang dipecah sehingga menjadi sebuah codeword baru. Partition digunakan agar penerima mudah dalam mendeteksi dan mengkoreksi multi bit error.
ANALISIS SUBSPACE CLUSTERING MENGGUNAKAN DBSCAN DAN SUBCLU UNTUK PROYEKSI PEKERJAAN ALUMNI PERGURUAN TINGGI Anni Rotua Aritonang; Sutarman Sutarman; Poltak Sihombing
Jurnal Teknovasi : Jurnal Teknik dan Inovasi Vol 2, No 1 (2015): Teknovasi April 2015
Publisher : LPPM Politeknik LP3I Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55445/teknovasi.v2i1.42

Abstract

Subspace clustering diproyeksikan sebagai teknik pencarian untuk mengelompokkan data atau atribut pada klaster yang berbeda, Pengelompokan dilakukan dengan menentukan tingkat kerapatan data dan juga mengidentifikasi outlier atau data yang tidak relevan, sehingga masing-masing cluster ada dalam subset tersendiri. Tesis ini mengusulkan inovasi algoritma subspace clustering based on density connection. Pada tahap awal akan dihitung kerapatan dimensi, hasil kerapatan dimensi akan dijadikan data masukan untuk menentukan klaster awal yang berdasarkan kerapatan dimensi, yakni dengan menggunakan Algoritma DBSCAN. Data pada setiap klaster kemudian akan diuji apakah memiliki hubungan dengan data pada klaster yang lain, yakni dengan menggunakan Algoritma SUBCLU. Hasil dari penelitian ini ditemukan bahawa SUBCLU tidak memiliki un-cluster dataset nyata, sehingga persepsi hasil cluster akan menghasilkan informasi yang lebih akurat sedangkan untuk kepuasan kerja dataset DBSCAN membutuhkan waktu lebih lama daripada metode SUBCLU. Untuk lebih besar dan lebih kompleks data, kinerja SUBCLU terlihat lebih efisien daripada DBSCAN.
E-Learning Sebagai Solulusi Pembelajaran Dari Rumah Di Tengah Pandemi Covid-19 Di MTs. MAS Al-Jamiyatul Washliyah Lubuk Pakam Herman Mawengkang; Sutarman Sutarman; Husain Husain; Mochamad Wahyudi
Jurnal Mantik Vol. 4 No. 3 (2020): November: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Various information technology-based learning products were created to improve the quality of learning, one of which is online learning media known as e-learning. In addition, during the Covid 19 pandemic, which required learning from home, Mts.Mas Al-Jamiyatul Washliyah Lubuk Pakam was no exception. The use of the E-Learning application in PKM aims to help Mts.Mas Al-Jamiyatul Washliyah Lubuk Pakam in the process of teaching and learning activities. With this application, it is hoped that it can help problems faced by teachers and students outside of class hours, such as lack of communication time between teachers and students, searching for information about the material being taught, and of course to facilitate teachers in providing material to students. The result achieved is the availability of supporting applications for teaching and learning activities that can be obtained regardless of time and place. The conclusion with the existence of E-Learning is that it makes it easier for teachers to provide learning to students outside of class hours such as providing material, easiness in giving assignments and collecting assignments, exams, and facilitating value information.
Analisis Keputusan Menggunakan Pendekatan Model Causal Loop Diagram (CLD) Model Dinamik untuk Perencanaan Wisata Syariah Berkelanjutan Herman Mawengkang; Sutarman; Husain
Jurnal Mantik Vol. 4 No. 3 (2020): November: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol4.2020.1122.pp2288-2291

Abstract

Sustainable tourism development impacts on many factors, so that a dynamic model approach to tourism research becomes clear in many cases, one of which is in the development of Islamic sustainable tourism. These approaches usually look at a particular problem or the whole picture of tourism. As a result, it becomes difficult to manage tourism towards sustainability. This paper provides an overview of the systems thinking approach to systems analysis using the Causal Loop Diagram (CLD) model for sustainable Islamic tourism planning problems. This study shows that systems thinking has proven to be an effective and powerful tool for explaining the complexity of the tourism system. This has helped simplify, clarify and integrate isolated problems associated with the industry, and provided a mechanism for group learning and decision making to achieve desired results. This paper proposes systems thinking to be used as an appropriate tool for sustainable tourism development. The results of this study can describe the dynamic model of sharia tourism development with the CLD approach so that it can see the influencing factors that indicate causation. Keywords: Model Causal Loop Diagram, Dynamic, Tourism, sharia
Penaksiran Parameter Distribusi Weibull Menggunakan Algoritma Genetika dan Particle Swarm Optimization Sarah Ayatun Nufus; Sutarman Sutarman
FARABI: Jurnal Matematika dan Pendidikan Matematika Vol 5 No 2 (2022): FARABI
Publisher : Program Studi Pendidikan Matematika FKIP UNIVA Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/farabi.v5i2.401

Abstract

This study aims toestimate and compare the results of the estimated parameters of the Weibull distributionusing the Genetic Algorithm (GA) and Particle Swarm Optimization (PSO). The Weibull distribution used is a two-parameter Weibull distribution and a three-parameterWeibull distribution. In the GA Algorithm, there are evolution operators such as crossover and mutation. Meanwhile, in PSO algorithm doesn’t. The evolution operators that can optimize complex problems and a very wide search space Evaluation of the two method is carried out by observing the difference in the resulting fitness values.Based on the simulation data from the estimator obtained using the R program, it is found that the two-parameter Weibull distribution parameter and a three-parameterWeibull distribution using a AG algorithm are both used in this distribution. This is supported by the small difference in the fitness value of the GA algorithm obtained compared to the PSO algorithm. The sample space also affects the difference in fitness. The large the sample space, the greater the fitness.
Improved Benders decomposition approach to complete robust optimization in box-interval Hendra Cipta; Saib Suwilo; Sutarman Sutarman; Herman Mawengkang
Bulletin of Electrical Engineering and Informatics Vol 11, No 5: October 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v11i5.4394

Abstract

Robust optimization is based on the assumption that uncertain data has a convex set as well as a finite set termed uncertainty. The discussion starts with determining the robust counterpart, which is accomplished by assuming the indeterminate data set is in the form of boxes, intervals, box-intervals, ellipses, or polyhedra. In this study, the robust counterpart is characterized by a box-interval uncertainty set. Robust counterpart formulation is also associated with master and subproblems. Robust Benders decomposition is applied to address problems with convex goals and quasiconvex constraints in robust optimization. For all data parameters, this method is used to determine the best resilient solution in the feasible region. A manual example of this problem's calculation is provided, and the process is continued using production and operations management–quantitative methods (POM-QM) software.
Co-Authors Ade Candra, Ade Afrizal . Albadri, Aldhi Alya Nadhira Nur Ananda Nabilah Faisal Andi Tenri Ampa Anni Rotua Aritonang E Herawati E Rosmaini Efendi, Syahril Elvina Herawati Erna Budhiarti Nababan Erwin ESM Nababan Esther SM Nababan Fahmi Izhari Fajar Muhajir Fathree Halawa Hanna Willa Dhany Heni Pujiastuti Herman Mawengkang Herman Saputra Husain Husain Husain Husain Ibnu Jaki Lubis Isfenti Sadalia Iskandarini Iwada Grawilser Talunohi JefrY Sudono Halim Jonathan Liviera Marpaung M Harun Al Rasyid Mahyuddin Mahyuddin K. M Nasution Mardiningsih Marpongahtun Maulida Yanti Mochamad Wahyudi Muhammad Ardiansyah Sembiring Muhammad Arsyad Parapat Gultom Poltak Sihombing Pratiwi, Risdy Absari Indah R Pane Rahmawati Pane Riki Andri Yusda Rismayani . Saib Suwilo Sarah Ayatun Nufus Sawaluddin Nasution