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All Journal MATEMATIKA BAREKENG: Jurnal Ilmu Matematika dan Terapan Parole (Jurnal Pendidikan Bahasa dan Sastra Indonesia) Journal of Indonesian Management
Fery Firmansyah
Universitas Sebelas Maret
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Physics Social Sciences Transportation

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PENERAPAN METODE DEMONSTRASI BERBASIS MEDIA CERITA LUCU BERGAMBAR DALAM PEMBELAJARAN MENULIS TEKS ANEKDOT PADA SISWA Firmansyah, Fery; Firmansyah, Dida
Parole (Jurnal Pendidikan Bahasa dan Sastra Indonesia) Vol 1, No 4 (2018): Volume 1 Nomor 4, Juli 2018
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (673.008 KB) | DOI: 10.22460/p.v1i4p585-590.956

Abstract

The research conducted in this article is to apply a method of media-based demonstration of funny pictorial stories in learning to write anecdotal text on students. The purpose of this research is to see the influence of media-based demonstration method of the funny story illustrated in the students. The reason for the implementation of the research because when students write anecdotal text they do not have the experience of a sarcastic story, so they do not find idea or idea. The quasi-experimental research method was chosen because it aims to test the effectiveness of demonstration methods and illustrated storytelling media on students' writing skills in anecdotal text writing lessons. The findings of an increase in writing an anecdotal text of students who initially pre-test value of 69.52 at the time of postest increased to 78.32. Mean value, Kolmogorov-Smirnov data normality test which states that the test score is normally distributed because the significance value (sig) is greater than 0.05 then H1 is accepted.
Graf Fuzzy Produk Firmansyah, Fery; Bayu, Surarso
MATEMATIKA Vol 14, No 3 (2011): Jurnal Matematika
Publisher : MATEMATIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (527.993 KB)

Abstract

Fuzzy graph is a graph which is consists of a pairs of vertex and edge that have degree contained on closed interval of real number [0,1] on each edge and vertex. Product fuzzy graph was defined by Dr. V. Ramaswamy and Poornima B by replacing “infimum” in definition of fuzzy graph by “product”. In this paper we study product fuzzy graph complete, in connection  complement of produk fuzzy graph, join of produk fuzzy graph and multiplication of produk fuzzy graph. We show that complement of the multiplication of two product fuzzy graphs complete is a multiplication of its complement, in which this disposition produces nil graph.  
The Influence Of Work Discipline And Work Ethic On The Work Productivity Of Restaurant Construction Workers Kampung Swasana Tasikmalaya Firmansyah, Fery; Rakhmat , Cece; Sutrisna , Arga
Journal of Indonesian Management Vol. 2 No. 3 (2022): September
Publisher : Penerbit Jurnal Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53697/jim.v2i3.907

Abstract

This study aims to determine simultaneously and partially the work productivity influenced by Work Discipline and Work Ethic in the Construction of The Swasana Village Restaurant. The method used in this study is a quantitative approach. The sample used was 30 respondents. The data obtained are primary data through questionnaires. The analysis used was multiple linear regression analysis via SPSS Version 24. The results of this study show that work discipline and work ethic simultaneously have a significant effect on Work Productivity. Work discipline partially has a significant effect on work productivity, work ethic partially has a significant effect on work productivity of workers in the construction of Kampung Swasana Restaurant.
OPTIMIZATION OF PARAMETERS IN MEWMV AND MEWMA CONTROL CHARTS FOR CLEAN WATER QUALITY CONTROL AT PP KRAKATAU TIRTA GRESIK Hafiyusholeh, Moh.; Khaulasari, Hani; Firmansyah, Fery; Ulinnuha, Nurissaidah
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 20 No 1 (2026): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol20iss1pp0729-0742

Abstract

Water is a vital resource whose quality directly affects public health. In Gresik Regency, water treatment processes must be closely monitored, particularly during production. PT PP Krakatau Tirta, a key provider of clean water in the region, plays a strategic role in treating raw water from the heavily polluted Bengawan Solo River. Ensuring that the treated water consistently meets health standards is crucial, highlighting the need for an effective process. This study aims to evaluate the clean water production process and assess the process capability in maintaining the quality of water produced by PT PP Krakatau Tirta Gresik. Laboratory data on key parameters, including pH, dissolved iron, and total dissolved solids, were collected daily from November 25, 2022, to May 31, 2023. These mandatory indicators were analyzed using Multivariate Exponentially Weighted Moving Variance (MEWMV) and Moving Average (MEWMA) control charts to assess process performance. A key contribution of this research lies in optimizing smoothing parameters to enhance control chart performance. Sixteen combinations of (ω,λ) were tested for MEWMV, with the optimal configuration found at (λ = 0.4) and (ω = 0.4), indicating that process variability is statistically stable. For MEWMA, nine values of λ were evaluated, and the optimal weight (λ=0.9) was identified as optimal, yielding a stable process mean after removing two out-of-control points. PT PP Krakatau Tirta, which plays a strategic role in treating raw water from the polluted Bengawan Solo River, was selected as a case study to evaluate the effectiveness of advanced monitoring methods. The results indicate that its clean water production process is well-controlled and capable, with water quality consistently meeting health and safety standards.
Co-Authors Hani Khaulasari Moh. Hafiyusholeh Nurissaidah Ulinnuha Rakhmat , Cece Surarso Bayu Sutrisna , Arga