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All Journal Widya Warta PYTHAGORAS: Jurnal Program Studi Pendidikan Matematika Al-Jabar : Jurnal Pendidikan Matematika EDUPEDIA Journal Of Business, Finance, and Economics (JBFE) Gemilang: Jurnal Manajemen dan Akuntansi Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) QISTINA: Jurnal Multidisiplin Indonesia Jurnal Kesehatan Amanah Journal of Artificial Intelligence and Digital Business Cakrawala: Jurnal Pengabdian Masyarakat Global
Vigih Hery Kristanto
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Religion Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Nursing Public Health Social Sciences

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Analisis Aktivitas Belajar Siswa Kelas XI SMA dalam Pembelajaran Matematika Berbantuan Geogebra antara Pendekatan Laboratorium dan Pendekatan Klasikal Rudhito, Marcellinus Andy; Iman Santoso, Fransiskus Gatot; Kristanto, Vigih Hery
Widya Warta No. 01 Tahun XXXVIII / Januari 2014
Publisher : Universitas Katolik Widya Mandala Surabaya Kampus Kota Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (405.958 KB)

Abstract

This research aims to find whether or not there is any difference of students’ study activity in GoeGebra assisted mathematics learning with laboratory approach and that with classical approach on the second-year-students of senior high school. The research is quantitative in nature. It was carried out at SMAN 1 and SMAN 5 Madiun in the semester two of the academic year 2012/2013. The data were collected using non-test method. It was in the form of observation sheets of students’ activity. The sample was obtained applying cluster random sampling technique. The statistical analysis of the data showed that students’ study activity in GoeGebra assisted mathematics learning with laboratory approach was better than thatwith classical approach.
PENGEMBANGAN MEDIA PEMBELAJARAN MENGGUNAKAN GEOGEBRA PADA SUB POKOK BAHASAN GARIS SINGGUNG PERSEKUTUAN DUA LINGKARAN Rohmawati, Elok; Kristanto, Vigih Hery
PYTHAGORAS : Jurnal Program Studi Pendidikan Matematika Vol 7, No 1 (2018): PYTHAGORAS: Jurnal Program Studi Pendidikan Matematika
Publisher : UNIVERSITAS RIAU KEPULAUAN, BATAM, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (645.944 KB) | DOI: 10.33373/pythagoras.v7i1.1186

Abstract

This research is a development research that aims to to find out the process and result of development of learning media of mathematics using Geogebra on sub subject of tangent alliance of two circles. Supporting devices used are RPP, BKS, BPG, and THB. The chosen development stage is Research and Development (R D) which has been modified by adding Nieveen criteria that is valid, practical and effective. Data collection techniques used questionnaires, observation sheets and tests. According to the criteria of practicality, it is known that the questionnaire of ease of using media reaches 79.8%. The operation of this media is so easy that it's easy to remember and can be used as a tool to learn the material. Questionnaires the role of teachers reached 81%. By using the teacher's activity media in explaining the material to be a little, because the students are more observing, summing up opinions, and working on the problem, so the teacher's interaction with the students is minimal, and the material explanation is enough to use the media. Observation sheet minimizes teacher's role by 76.95%. From the observer observation the students observed more, no difficulties in the use of media. However, learning cannot be finished as in RPP. According to the effectiveness criteria seen from the test of student learning outcomes so that the mastery of classical reach 35%. This is because learning is too focused on observation and discovery of the formula so that students do not practice in doing the problem. From this research, there are several findings, namely: learning media using Geogebra, supporting tool, namely RPP, BKS, BPG, THB and instrument have validity level on valid criteria, learning media using Geogebra is easy to use, learning media using Geogebra with supporting device can minimize the role of teachers so that the media meet the practical criteria. The test of learning outcomes has not been completed in a classical manner because the classical completeness does not reach 75% upwards, meaning that the media has not met the effective criteria.
ANALISIS TAHAP PEMBUKTIKAN TEOREMA STEWART PADA MAHASISWA PROGRAM STUDI PENDIDIKAN MATEMATIKA UNIVERISTAS KATOLIK WIDYA MANDALA MADIUN Kristanto, Vigih Hery
PYTHAGORAS : Jurnal Program Studi Pendidikan Matematika Vol 7, No 2 (2018): PYTHAGORAS: Jurnal Program Studi Pendidikan Matematika
Publisher : UNIVERSITAS RIAU KEPULAUAN, BATAM, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (669.586 KB) | DOI: 10.33373/pythagoras.v7i2.1316

Abstract

The purpose of this research was to find out how the stage of proofing the Stewart theorem was conducted by students of the Mathematics Education Department at Catholic Widya Mandala University of Madiun. This type of research is qualitative research with descriptive data analysis. The number of research subjects consisted of three students. This study describes the stage of proofing Stewart's theorem by students. The data collection process begins with the subject being asked to prove Stewart's theorem and write down the process of proving Stewart's theorem on the answer sheet provided. From the results of data collection, it was found that the verification process carried out by the three students used the direct verification method, there were some similarities between the three students in initiating the verification process, namely: drawing a high line on a triangle and using the pythagoras theorem to add information used in the verification process, to proving that Stewart's theorem required precision when describing an algebraic form and understanding of algebraic concepts from numbers, to prove Stewart's theorem needed time according to the speed of thinking that proves, to prove the Stewart theorem required problem solving skills, logical thinking, critical, analytical and systematic. Thus it can be concluded that, in general the steps of proving Stewart's theorem carried out by students of the Mathematics Education Department, starting with drawing ABC triangles and also describing auxiliary lines (high of CE), collecting information used in the verification process, then use the information obtained to describe the shape of the right side of the equation  becomes the left hand side, so that the equation applies.
GLOSSARY ENGLISH MATHEMATICS: LEARNING MEDIA TO IMPROVE STUDENTS' DIGITAL AND VOCABULARY LITERACY Septia, Tika; Fachrudin, Achmad Dhany; Kristanto, Vigih Hery
EDUPEDIA Vol 8, No 2 (2024): Oktober
Publisher : Universitas Muhammadiyah Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24269/ed.v8i2.3028

Abstract

English is a demand in the 5.0 era, especially in education. Students use many English journals and references. However, the students' interest in English still needs to be improved. Students need to understand books in English. An English math glossary can help them understand math terms in English. The English Mathematical Glossary contains explanations of mathematical terms—development of a Mathematical English Glossary using an Android application. Android applications have recently developed rapidly because of their nature that can be used anywhere and anytime. This research is development research using the SDLC (System Development Life Cycle) model. The Mathematical English Glossary's development has undergone five stages: planning, analyzing, designing, implementing, and testing. The product developed is an Android-based Mathematical English Glossary. The study results show that the Android-based Mathematical English Glossary is valid and practical in content, language, and presentation and effectively increases student digital literacy. After the vocabulary size test was carried out, it was found that the Android-based Mathematical English Glossary could improve the vocabulary skills of mathematics education students
Sosialisasi Pemanfaatan Chatgpt Sebagai Pendukung Alat Pembelajaran Bagi Guru SMP PGRI 8 Sidoarjo Vigih Hery Kristanto; Eka Nurmala Sari Agustina; Tanti Diyah Rahmawati; Diyah Purwitasari
Cakrawala: Jurnal Pengabdian Masyarakat Global Vol. 3 No. 4 (2024): Cakrawala: Jurnal Pengabdian Masyarakat Global
Publisher : Universitas 45 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30640/cakrawala.v3i4.3322

Abstract

In the ever-evolving digital era, education faces unprecedented challenges and opportunities. Technology is now an integrated part of the learning process, providing various tools that can increase the effectiveness and efficiency of education. One technological innovation that has great potential to support educators is ChatGPT. This ability can be utilized by teachers for various purposes, including in making learning tools. With the help of ChatGPT, teachers can save time and energy in designing teaching materials, assignments and learning evaluations that suit students' needs (Kharis et al., 2024). The teachers at SMP PGRI 8 Sidoarjo have not made much use of technology that makes it easier for them to prepare learning tools. This can be seen from the results of initial observations which show that 71.4% of teachers have never used applications or technology that makes it easier to create learning tools. This Community Service implementation was carried out with the aim of introducing, socializing and assisting teachers in utilizing ChatGPT to develop learning tools more quickly, effectively and efficiently. The results of participant responses regarding the implementation of activities are measured by participant satisfaction, which is the average of participant satisfaction with the satisfaction indicator factors. In this activity, 84.46% of participants gave an average rating of very good to the statement items in the questionnaire, which can be interpreted as meaning that 84.46% of participants were very satisfied.
Pengaruh Efisiensi Biaya dan Operasional Keagenan terhadap Implementasi SSM Pengangkut pada PT Pertamina Transkontinental Balikpapan Fahrezi, Irgi Ahmad; Putri, Indah Ayu Johanda; Kristanto, Vigih Hery; Amrullah, Romanda Annas
QISTINA: Jurnal Multidisiplin Indonesia Vol 4, No 1 (2025): June 2025
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/qistina.v4i1.6178

Abstract

Penelitian ini bertujuan untuk mengkaji dan menganalisis secara mendalam pengaruh efisiensi biaya dan operasional keagenan terhadap implementasi Sistem Single Submission (SSM) Pengangkut pada PT Pertamina Transkontinental Balikpapan. Implementasi SSM Pengangkut yang merupakan sistem baru integrasi layanan digital di bidang pelayaran, diharapkan mampu menyederhanakan proses pengajuan dokumen, meningkatkan transparansi, mempercepat layanan clearance kapal, serta mengurangi pemborosan biaya dalam kegiatan keagenan kapal. Dengan metode penelitian  kuantitatif, serta teknik analisis regresi linier berganda untuk menguji hubungan antara variabel independen (efisiensi biaya dan operasional keagenan) dengan variabel dependen (implementasi SSM Pengangkut). Hasil penelitian menunjukkan bahwa baik efisiensi biaya maupun efisiensi operasional keagenan memiliki pengaruh signifikan terhadap keberhasilan implementasi SSM Pengangkut. Efisiensi biaya terbukti mampu menurunkan total pengeluaran dalam pengurusan dokumen kapal dan mendukung profitabilitas perusahaan. Sementara itu, efisiensi operasional berkontribusi dalam menekan waktu pelayanan serta mencegah keterlambatan keberangkatan kapal yang berdampak luas bagi pemilik kapal, agen, dan pengguna jasa. Dengan demikian, penelitian ini merekomendasikan optimalisasi penggunaan SSM Pengangkut secara menyeluruh di seluruh unit operasional, peningkatan kompetensi sumber daya manusia, serta pengembangan infrastruktur digital yang mendukung integrasi antar instansi. Diharapkan hasil penelitian ini dapat memberikan kontribusi nyata dalam upaya peningkatan efisiensi layanan keagenan kapal dan mendukung pertumbuhan sektor logistik nasional yang lebih kompetitif di era global
Evaluasi Penurunan Kecelakaan Kerja di Kapal Melalui Penerapan Aturan Emas HSSE Secara Efektif Inaya Ajeng Larasati; Romanda Annas Amrullah; Vigih Hery Kristanto; Bugi Nugraha
Jurnal Kesehatan Amanah Vol. 9 No. 1 (2025): Jurnal Kesehatan Amanah
Publisher : Universitas Muhammadiyah Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57214/jka.v9i1.839

Abstract

In the shipping industry, safety on board is one of the serious challenges that must be addressed due to the high risk of occupational accidents. PT X implements the HSSE Golden Rules, which consist of the principles of compliance, intervention, and care as a preventive measure to reduce the level of work accident.. This study aims to analyze the implementation of HSSE Golden Rules in reducing the level of work accidents on board PT X. The research method used is descriptive qualitative with data collection techniques in the form of interviews (through online forms) and documentation of unsafe action, unsafe condition, and nearmiss reports. The data analysis technique used is Strengths, Weakness, Opportunities, Threats (SWOT) analysis. The result show that the HSSE Golden Rules are eable to reduce the level of work accidents on ships, as evidenced by the decrease in the number of unsafe action, unsafe condition, and nearmiss reports from 2023 to 2024. More structured reports that include corrective actions indicate the formation of a better reporting and prevention culture. It can be concluded that the implementation of HSSE Golden Rules is effective in forming a safety culture and can reduce the level of work accidents on PT X ships.
Pengaruh Integrasi Pelabuhan PT. Berlian Manyar Sejahtera dengan Kawasan Industri JIIPE terhadap Efisiensi Distribusi Logistik Alfiana Noor Fajari; Faris Nofandi; Vigih Hery Kristanto; Indah Ayu Johanda Putri
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v4i1.4913

Abstract

This study aims to analyze the effect of port integration of PT Berlian Manyar Sejahtera with JIIPE Industrial Estate on logistics distribution efficiency. The background is the existence of distribution costs in Indonesia, which are relatively expensive. The integration of ports with industrial estates and other factors could cut distribution costs. The purpose of this research is to find out how many percent of the influence of proximity distance for distribution costs and also the time in the distribution process. In this research, a quantitative methods is used which is assisted by a software, namely SPSS version 27. Data collection techniques were carried out by interviews, documentation, and literature study. The data used includes the distance from the port to the warehouse receiving goods, distribution rates, and the length of time in the loading and unloading process. The results of the analysis show that there is an influence between distance, costs, and tariffs in the distribution process. And how this integration is significantly beneficial for service users
Strategi Peningkatan Efisiensi Waktu Bongkar Muat Antara Dermaga dan Container Yard di PT. Terminal Teluk Lamong Nabila Aisya Savitri; Elly Kusumawati; Vigih Hery Kristanto
GEMILANG: Jurnal Manajemen dan Akuntansi Vol. 5 No. 3 (2025): Jurnal Manajemen dan Akuntansi
Publisher : BADAN PENERBIT STIEPARI PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56910/gemilang.v5i3.2218

Abstract

This study aims to determine the condition of existing activities in loading and unloading at the Teluk Lamong Terminal Port. Also, to find out how the strategy is to increase the effiency of loading and unloading time between the pier and container yard at Teluk Lamong Port based on a comparison of performance before and after the implementation solution. The background of this study based on the importance of operational efficiency of the Port in supporting smooth logistic and increasing the competitiveness of the marine transportation sector. The method used in this study is mix methods, which is a combination of qualitative and quantitative approaches. Data collection was carried out through direct observation, interviews with related parties, field documentation, and statistical analysis using normality, homogeneity, and t-test tests. The findings show that the additional of equipment can significantly reduce loading and unloading process time and increase work effectiveness. Thus, the use of this tool contributes to improving operational performance at Teluk Lamong Terminal and supports faster and more efficient logistic services.
Pengaruh Penerapan Supply Chain Resilience terhadap Kepuasan Pelanggan di Terminal Berlian Manyar Sejahtera Mohammad Arif Rahmadhani; Elly Kusumawati; Vigih Hery Kristanto; Bugi Nugraha
GEMILANG: Jurnal Manajemen dan Akuntansi Vol. 5 No. 3 (2025): Jurnal Manajemen dan Akuntansi
Publisher : BADAN PENERBIT STIEPARI PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56910/gemilang.v5i3.2241

Abstract

This study aims to analyze the influence of the implementation of Supply Chain Resilience(SCR) on customer satisfaction at the Berlian Manyar Sejahtera Terminal, Gresik, which is part of the Java Integrated Industrial and Ports Estate (JIIPE) area. The background of this study is based on the importance of supply chain resilience in ensuring operational continuity, especially in the dynamic and competitive maritime logistics sector. The study uses a quantitative approach with a survey method by distributing questionnaires to terminal service users. The sampling technique used ispurposive sampling, with a total of 30 respondents. The data were analyzed using SPSS software version 27 with a series of statistical tests, including validity, reliability, normality, linearity, heteroscedasticity, simple linear regression, and t test.t. The results of the study show that the implementation ofSupply Chain Resiliencehas a positive and significant effect on customer satisfaction. The regression coefficient value of 0.721 indicates that every one unit increase in SCR will increase customer satisfaction by 0.721 units. In addition, the coefficient of determination (R²) of 0.753 indicates that 75.3% of the variation in customer satisfaction can be explained by the SCR variable. This finding confirms that aspects such as HR readiness, operational flexibility, and coordination and communication in the supply chain have an important role in shaping positive customer perceptions of port services. Thus, increasing supply chain resilience is a key strategy in improving terminal competitiveness.
Co-Authors Ais Sanda Putra Trisna Alfiana Noor Fajari Amelia, Jessica Cikitha Anggraeni, Anggita Adelia Arisusanty, Dian Junita Bugi Nugraha Dhany Fachrudin, Achmad Diyah Purwitasari Eka Nurmala Sari Agustina, Eka Nurmala Sari Elly Kusumawati Elsa Maulinda Savana Fahrezi, Irgi Ahmad Faris Nofandi Faris Nofandi Henna Nurdiansari Inaya Ajeng Larasati Indah Ayu Johanda Putri Marcellinus Andy Rudhito Maulana, Moch Rabbul Maulidiah Rahmawati Mohammad Arif Rahmadhani Nabila Aisya Savitri Putri, Indah Ayu Johanda Rahajeng, Resty Rahmawati, Maulidiah Resty Rahajeng Rohmawati, Elok Romanda Annas Amrullah Sandi, Wulan Marlia Santoso, Fransiskus Gatot Iman Sianturi, Intan Tanti Diyah Rahmawati Tanti Diyah Rahmawati, Tanti Diyah Tika Septia