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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains JURNAL PENDIDIKAN TAMBUSAI Golden Age: Jurnal Ilmiah Tumbuh Kembang Anak Usia Dini Pelita Masyarakat Journal of Applied Materials and Technology INCODING: Journal of Informatics and Computer Science Engineering SAINSTEK Jurnal Penelitian Pendidikan Indonesia
Ermiyati Ermiyati, Ermiyati
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Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Other

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Pengaruh Waktu Pengadukan Terhadap Nilai Slump Dan Kandungan Udara Serta Kuat Tekan Beton Khaidir, Trifad Mochd; Kurniawandy, Alex; Ermiyati, Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The compression strength of concrete can be affected by many factors. One of them are water-cement ratio and duration of mixing. The duration of mixing is usually only being estimated by workers and supervisors. In this research, the duration of mixing used are 2, 3, 4, 5, and 6 minutes with water-cement ratio 0,4 and 0,5. The 2 minutes duration of mixing being used as reference. From the result of the research, it can be seen that the value of water-cement ratio can also affect the value of air content and slump. The more liquid water-cement ratio of 0,5 can be produce a higher slump value. The air content and the slump may decrease as the duration of mixing increase, thus the 6 minutes duration has the smallest value compared to other duration. The highest compression strength is 33,12 MPa at 6 minutes for water-cement ratio 0,4 and 35,12 MPa at 5 minutes for water-cement ratio 0,5Keywords: water-cement ratio, compression strength, duration of mixing, air content, fresh concrete
Analisa perbandingan Kuat Tekan Beton Semen PCC Dan Semen Tipe 1 Terhadap Pemakaian Sikament NN Istighfar, Irfan; Kurniawandy, Alex; Ermiyati, Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The state of the art in cement manafacturer produces cement that can give high quality concrete and environmentally sustainable, which of product is Portland Composite Cement (PCC). This research aim to find solution to increase the compressive strength of PCC approaching the value of Ordinary Portland Cement (OPC) Compressive Strength. One of the solution is by adding Sikament NN into the concrete mixture. Samples are in Cylindrical shape 15 cm diameter and 30 cm height in age of test 7, 28 and 91 day with 3 samples per each. Design of mix composition use ACI method with w/c 0,4 ; 0,35 ; 0,3. The initial time for OPC  is 92,99 minute and the final setting time is 150 minute, the initial time for PCC is 119,17 minute and final setting time is 165,5 minute. The initial time for OPC  with Sikament NN is 222,5 minute and final setting time is 285 minute, the initial time for PCC with Sikament NN is 247,5 minute and final setting time is 300 minute. The result of compressive strength at age of samples of 7, 28 and 91 days with FAS of 0,4; 0,35; and 0,30; shows higher compressive strength of type 1 cement compared to PCC cement’s compressive strength and higher compresive strength of type 1+Sikament NN compared to PCC+Sikament NN’s compresive strength and higher compresive strength of PCC+Sikament NN compared to type 1 cement’s compressive strength.  Keyword : Compressive Strength, PCC cement, Type 1 cement , initial time, Sikament NN
Sifat Mekanis Beton Akibat Pengaruh Steel Slag Sebagai Bahan Subtitusi Agregat Halus dengan Agregat Lokal Riau Wirma, Rizki; Kurniawandy, Alex; Ermiyati, Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The research has a purpose to study the mechanical properties of concrete when using steel slag as an alternative for subtituting sand material in the mixture of concrete with fc’ 25 MPa. This research consisted of 6 tests. They were permeability, porosity, shrinkage, compressive strength, Scanning Electronic Microscope (SEM) and Energy Dispersive Spectrometry (EDS). The steel slag used were 0 % and 30 % of total weight of sand. The permeability and porosity test were carried out at 28 days. The shrinkage test was conducted at 7 days. The compressive strengths were tested at 28, 91, and 180 days. The samples were soaked in normal and peat water. According to the permeability, porosity, and shrinkage test, the concrete using 30 % steel slag got lower value compared to a normal concrete. Regularly, when the normal concrete is soaked in normal water, the compressive strength risen up at 28, 91, and 180 days. On the other hand, the concrete soaked in peat water gets the compressive strength increased at 28, 91 days, but fell down at 180 days. Based on the compressive strength results, the concrete using 30 % steel slag continued to increase with day, although they were soaked in normal or peat water. SEM test showed that steel slag occupied the void between aggregate and cement paste. It made the void of concrete became denser and got a higher strength. EDS test revealed that the concrete using 30 % steel slag contained pozzolanic material.Keywords : Steel slag, Permeability, Porosity, Shrinkage, Compressive strength, SEM, EDS.
Early Childhood Education Teachers' Perspectives on Play-Based Learning: A Survey in Yogyakarta Ermiyati, Ermiyati; Rohmadheny, Prima Suci; Rosada, Ulfa Danni; Hastuti, Dwi
Golden Age: Jurnal Ilmiah Tumbuh Kembang Anak Usia Dini Vol. 9 No. 2 (2024)
Publisher : Program Studi Pendidikan Islam Anak Usia Dini, Fakultas Ilmu Tarbiyah dan Keguruan, UIN Sunan Kalijaga, Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/jga.2024.92-10

Abstract

This study explores and analyzes the perspectives of early childhood education (ECE) teachers in Yogyakarta regarding Play-Based Learning (PBL) and evaluates the alignment of their perspectives with PBL implementation in early childhood settings. Utilizing a mixed-methods approach, data were collected through a structured questionnaire administered via Google Forms to 41 randomly selected ECE teachers, representing 20% of the target population. The survey included 26 closed-ended items on a Likert scale and four semi-open questions for additional insights. Descriptive statistical analysis using SPSS version 26 revealed a mean perspective score of 39.5854 with a standard deviation of 6.70439, categorizing 56.1% of teachers as having a medium alignment with PBL, 26.8% as high, and 17.1% as low. Thematic analysis of qualitative responses highlighted the perceived benefits of PBL for both children and teachers, including enhanced creativity, easier engagement, and improved learning environments. Despite the limited sample size and potential biases, the findings underscore the importance of continuous professional development for ECE teachers. Future research should expand the sample size and explore additional variables influencing teachers' perspectives. These insights are crucial for policymakers and educational institutions aiming to enhance early childhood education quality through effective PBL implementation.
E-module innovation: a product-based approach to database practicum Ermiyati, Ermiyati; Jalinus, Nizwardi; Waskito, Waskito; Muskhir, Mukhlidi
JPPI (Jurnal Penelitian Pendidikan Indonesia) Vol 10, No 4 (2024): JPPI (Jurnal Penelitian Pendidikan Indonesia)
Publisher : Indonesian Institute for Counseling, Education and Theraphy (IICET)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29210/020244654

Abstract

Learning media is a crucial component in supporting the educational process. However, the practical learning process for the database subject at SMK Negeri 1 Sintuk Toboh Gadang has not fully prepared students to be independent and work-ready. This study aims to develop a product-based practicum module for the database subject, which is expected to enhance students' creativity, independence, and learning outcomes. The research method used is Research and Development (R&D) with the 4D model (define, design, develop, disseminate). Validation was conducted by media and content experts, followed by field trials involving 23 students. The research results show that the developed product-based e-module is valid with an average score of 0.85. The practicality of the module was rated very high, with a Reproducibility Coefficient of 0.98 and a Scalability Coefficient of 0.95. Its effectiveness was demonstrated through an improvement in student learning outcomes, with an N-Gain score of 0.73, categorized as high. Based on these findings, the module is considered valid, practical, and effective in improving student learning outcomes while promoting creativity and independence in database learning.
A comparative study of data-driven models for discharge forecasting: a study case of Siak river, Pekanbaru water gauge station Fauzi, Manyuk; Sujatmoko, Bambang; Darmawan, Igeny Dwiana; Siswanto, Siswanto; Ermiyati, Ermiyati; Misriani, Merley
Journal of Applied Materials and Technology Vol. 6 No. 2 (2025): March 2025
Publisher : Faculty of Engineering Universitas Riau and Applied Materials and Technology Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.6.2.47-57

Abstract

The availability of long-term river discharge data covering at least 30 years is needed for proper hydrological studies, so the ability to predict river discharge is a matter of concern in the field of civil engineering. The Siak River in Pekanbaru City experiences overflowing water during the rainy season. One of the steps to prevent flooding on the Siak River is to utilize river discharge information, data-driven models utilize historical data to train or derive useful insights for predicting outputs, some data-driven models that are suitable for generating monthly historical data into new data include the Autoregressive Integrated Moving Average (ARIMA) method and the Thomas-Fiering method. The research begins by conducting the Rescaled Adjusted Partial Sums (RAPS) test to test the homogeneity of the data, then the prediction of discharge data with several schemes using the ARIMA and Thomas-Fiering methods, then the performance comparison between the two models is carried out using MAPE, RMSE, Nash-Sutcliffe, and correlation coefficient r. From the research results, it was found that the Thomas-Fiering method tends to be more accurate for predicting 1-year monthly discharge as well as long-term discharge, namely periods of 3, 5, and 7 years, with the best prediction being 1-year discharge prediction using 5 years of observed discharge with MAPE, RMSE, Nash-Sutcliffe, and correlation coefficient r values of 7.42%, 26.76 m3s-1, 0.92, and 0.96, respectively. This study could be a valuable reference for future studies in selection and further modification of data driven discharge simulation models.
Evaluasi Time Schedule Menggunakan Network Planning (Studi Kasus: Pada Proyek Pembangunan Gedung Rawat Inap Kelas III Tahap III Rumah Sakit Umum Daerah Bangkinang, Riau) Moreno, Yenita; Ermiyati, Ermiyati; Pratama, Syurya Adi; Suprasman, Suprasman
INCODING: Journal of Informatics and Computer Science Engineering Vol 3, No 1 (2023): INCODING APRIL
Publisher : Mahesa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34007/incoding.v3i1.331

Abstract

Time Schedule is a detailed division of work duration on each project work. The problem in this study is the ineffectiveness of the duration of the work and the amount of work done is not in accordance with the planned duration. The purpose of the study was to evaluate the time schedule using the network planning method to determine the critical trajectory by using Microsoft Project 2016 software and to accelerate the duration of work from its original duration by using the acceleration method of adding labor, increasing working hours and accelerating the work shift method. The conclusion of time schedule evaluation using network planning is obtained as many as 50 work items which are included in the critical path. After accelerating with three acceleration methods, it was found that the results of accelerating the addition of manpower which cut the time by 3 days from the original duration, acceleration by adding 2 hours of work cut 7 working days and acceleration with the work shift method which cut the duration to 21 working days from the original duration. which is 206 working days, then of the three methods of acceleration the most effective is the shift method.
Pelatihan Pemanfaatan Potensi Kayu Lokal Untuk Mendukung Sektor Pariwisata pada Kelompok Pemuda Desa Aur Sati Kecamatan Tambang Kampar Riau Nurdin, Nurdin; Fakhri, Fakhri; Ermiyati, Ermiyati; Morena, Yenita; Suprayogi, Imam; Fauzi, Manyuk; Novan, Andre
Pelita Masyarakat Vol. 6 No. 1 (2024): Pelita Masyarakat, September
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/pelitamasyarakat.v6i1.11220

Abstract

The potential of local wood and the large amount of wood waste from the wood processing industry and window and frame businesses in Aur Sati Village, Tambang District, Kampar Regency, need to be utilized by the community so that training is needed to utilize local wood potential to support the tourism sector for youth groups and PKK mothers in the village. The purpose of this activity is to assist in optimizing processed wood waste to add economic value, and it is hoped that the results of this activity can provide knowledge and technology for utilizing local wood resources so that in the future it will be able to increase community income to support the tourism sector. The activity results have been applied as decorative table products from Durian tree trunks that are no longer productive and processed wood waste from the community. The products produced in terms of visual appearance have distinctive characteristics and look classic, so they will have a fairly high selling price. The results of this community service activity are in the form of assistance to the target audience in the form of training/counseling on making decorative tables from pieces of Durian tree trunks that are no longer productive and processed waste from the community.
Pengaruh Penambahan Limbah Ekstraksi Buah Kelapa Sawit Terhadap Pembuatan Paving Block Setiawan, Wahyu; Kurniawandy, Alex; Ermiyati, Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The waste of palm know as waste of palm oil extraction, which is recently available abundantly. One of efforts in using this waste material is as additive in paving block industry. This research presents the efficiency of waste of palm oil extraction as an additive material of paving block at optimum mix composition regarding the paving block compressive strength, absorption and resistance to chemicals.The composition of waste of palm oil extraction was 0%, 2,5%, 5%, 7,5%, 10% and 12,5% by weight of cement. Research results showed that the use of waste of palm oil extraction as an additive affect the quality of the paving block. The best composition of paving block in this research was the amount of waste of palm oil extraction can be added to paving block as much as 7,5%. It was shown from the value of compressive strength of 7, 14, and 28 days increased to reach 18,3 MPa, water absorption is 5,9%, and resistant to sodium sulfate. Based on SNI 03-0691-1996, paving block generated from this treatment fitted in C quality of paving block and can be used for parking area.Keywords: waste of palm oil extraction, paving block
Pengaruh Penambahan Limbah Ekstraksi Buah Kelapa Sawit Terhadap Pembuatan Beton Kasuma, Halim; Kurniawandy, Alex; Ermiyati, Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The purpose of this research is to utilize the waste of palm oil with investigating the mechanical properties. The waste materials are the result of palm oil extraction. The experiment conducted to investigate the effect of this material over compressive strength, absorption, porosity, and setting time. The content of palm oil waste which added to normal concrete are varieties which are 0%, 2%, 4%, 6%, 8% and 10% of the weight of cement. The porosity test, absorption test and compressive test were performed at ages 7, 14 and 28 days for each test while curing with ordinary water. The results showed that the content of palm oil waste 2%, 4% and 6% decrease the compressive strength. Otherwise the addition of 8% and 10% increase the compressive strength. The absorption and porosity test value increase along with increase the content of palm oil using. The setting time with adding of palm oil waste is faster, rather than normal concrete. In conclusion, utilization of the waste of palm oil for concrete mixture can be done.Keyword: Concrete, Waste of Palm Oil, Extraction, Compressive strength, Porosity, Setting time
Co-Authors Alex Kurniawandy Bambang Sujatmoko Darmawan, Igeny Dwiana Dwi Hastuti Ernawati Ernawati Fakhri, Fakhri Fauzi, Manyuk Gussyafri Imam Suprayogi Istighfar, Irfan Kasuma, Halim Moreno, Yenita Muskhir, Mukhlidi Nizwardi Jalinus Novan, Andre Nurdin Nurdin Pratama, Syurya Adi Prima Suci Rohmadheny Rosada, Ulfa Danni S Siswanto Safridatul Audah Suprasman, Suprasman Trifad Mochd Khaidir, Trifad Mochd Wahyu Setiawan Waskito Waskito, Waskito Widya Wahyuni Wirma, Rizki Yenita Morena