Universitas Maritim Raja Ali Haji Pusat Jurnal Ilmiah
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The Role of Carbon Emission Disclosure in Moderating Profitability and GCG on Firm Value in Indonesia
Full text linkThis study aims to examine the relationship between profitability and good corporate governance (GCG), measured through independent commissioners, institutional ownership, managerial ownership, and gender diversity, on firm value, with carbon emission disclosure as a moderating variable. This study employs the panel data regression method using a sample of energy sector companies listed on the Indonesia Stock Exchange from 2019 to 2023. The findings suggest that profitability significantly enhances firm value, whereas independent commissioners and gender diversity have a negative impact. On the other hand, institutional ownership and managerial ownership do not show any effect. Additionally, carbon emission disclosure can positively moderate the relationship between independent commissioners, institutional ownership, and gender diversity with firm value. However, carbon emission disclosure negatively moderates the relationship between profitability and managerial ownership with firm value. The findings of this study can serve as a reference for companies in addressing environmental responsibility disclosures and provide recommendations for the government to consider policies regarding carbon emission disclosure in sustainability reporting
Peningkatan keterampilan pengarsipan digital siswa sekolah menengah kejuruan dan implikasinya terhadap kebijakan pendidikan kejuruan
Full text linkPengabdian masyarakat ini dilaksanakan sebagai respons terhadap pesatnya perkembangan teknologi informasi yang berdampak pada dunia kerja, khususnya di bidang administrasi perkantoran. Keterampilan dalam pengarsipan digital menjadi kompetensi penting bagi siswa SMK jurusan Administrasi Perkantoran di Kota Jayapura agar lebih siap menghadapi tuntutan dunia kerja berbasis digital. Kegiatan ini bertujuan untuk meningkatkan keterampilan siswa dalam mengelola dokumen digital dan menganalisis implikasinya terhadap pendidikan vokasi. Pelatihan dilaksanakan selama tiga hari, melibatkan 61 siswa dari tiga kelas, dengan metode berupa workshop interaktif yang mencakup pembuatan dokumen resmi menggunakan Microsoft Word dan pengorganisasian file digital melalui Google Drive. Materi disampaikan melalui presentasi dan praktik langsung di laboratorium komputer. Teknik analisis data yang digunakan adalah kuantitatif deskriptif, dengan membandingkan hasil post-test praktik siswa di akhir sesi. Hasil menunjukkan peningkatan signifikan dalam keterampilan siswa setelah mengikuti pelatihan. Sebagian besar peserta (73,7%) mencapai nilai ≥70 pada post-test, meningkat tajam dibandingkan hasil pre-test. Peningkatan tampak pada kemampuan menyusun dokumen formal, menata folder secara sistematis, serta menggunakan Google Drive untuk menyimpan dan membagikan file. Pelatihan berbasis praktik terbukti efektif dalam membangun pemahaman dan keterampilan siswa terhadap pengarsipan digital, serta menunjukkan pentingnya integrasi keterampilan digital dalam kurikulum pendidikan vokasi untuk menjawab tantangan dunia kerja modern
PQRST (Preview, Question, Read, Summarize, Test) Technique to Enhance Students’ Reading Comprehension on Narrative Text at SMP Negeri 1 Bintan Timur
Full text linkPeer Score Presentation in Non-English Department Classes: Investigating Students’ Perceptions to Boost Confidence
Full text linkEnglish is a required course during the first and second semesters learning in Vocational Higher Education in Indonesia. Recognizing the importance of future career demands, presentation skills are incorporated into the Semester Learning Plans as English for Specific Purposes. This research focuses on students\u27 perspectives regarding English learning through presentations regarding their own field particularly the implementation of peer scoring. Employing a qualitative descriptive approach, the study involved first-semester students at Politeknik Negeri Banjarmasin. One hundred and fifteen students of Banjarmasin State Polytechnic, Indonesia majoring in Mining Engineering (19 students), Civil Engineering (35 students) and Accounting (61 students) responded to a questionnaire, and ten students were interviewed, serving as voluntarily participants. Data collection method included a questionnaire administered via Google Form and interviews for triangulation. Students filled in the questionnaire after scoring their peer’s presentation. In scoring their peers, they used a presentation scoring rubric. Findings indicate a generally positive perception among students towards peer scoring presentations. Despite experiencing anxiety during preparation and delivery of presentation, students expressed high motivation and found the presentation experience rewarding as the scores not only from the lecturer but also from their peers. They worried to score at the beginning, but the scoring rubric help them guide along the process. Some students who commonly do not pay attention to the presenters in the presentation are now fully paying attention because they are in charge to score. Overall, students viewed presentation projects favorably, highlighting their potential to improve speaking performance and be a rater on their peers’ performance. The implication of this research is to highlight students’ ability to deliver a presentation as well as build their confidence in speaking activities
REDUKSI EMISI PARTIKULAT DARI PELEBURAN LIMBAH PLASTIK: TINJAUAN TEKNOLOGI FILTRASI UDARA BERBASIS BAHAN ALAMI
Full text linkEmisi gas dan partikel halus hasil dari proses peleburan limbah plastik dalam pembuatan paving block dapat memberikan dampak negatif terhadap lingkungan dan kesehatan manusia. Review penelitian ini bertujuan untuk mengkaji berbagai jenis emisi yang dihasilkan selama proses peleburan dan mengevaluasi teknologi filtrasi yang paling efektif dalam mereduksi polutan udara. Metode penelitian dilakukan melalui studi literatur dari berbagai jurnal terkait emisi dari proses peleburan plastik serta teknologi filtrasi yang tersedia. Hasil kajian menunjukkan bahwa emisi utama mencakup senyawa organik volatil (VOC), dioksin, furan, karbon monoksida (CO), dan partikel halus (PM10 dan PM2.5). Berdasarkan analisis, kombinasi filter HEPA, karbon aktif, dan scrubber basah berbasis larutan alkali merupakan solusi optimal dalam mengurangi dampak emisi. Penelitian ini juga mengusulkan model filtrasi berbahan alami yang dinamakan AIRPUSAKA, yang terdiri dari air kapur, sabut kelapa, dan karbon aktif tempurung kelapa, sebagai solusi alternatif yang ramah lingkungan untuk aplikasi industri daur ulang plasti
EFEKTIVITAS PENGGUNAAN APLIKASI QUIZWHIZZER UNTUK MENINGKATKAN KEMANDIRIAN BELAJAR MAHASISWA
Full text linkRendahnya pemanfaatan media pembelajaran berbasis gamifikasi menjadikan mahasiswa kurang termotivasi dalam perkuliahan, sehingga kemandirian belajar menjadi rendah. Penerapan aplikasi quizwhizzer merupakan salah satu upaya untuk meningkatkan kemandirian belajar mahasiswa. Tujuan penelitian ini adalah untuk menguji efektivitas aplikasi quizwhizzer dalam peningkatan kemandirian belajar mahasiswa. Sampel penelitin ini adalah 26 mahasiswa Pendidikan Kimia Universitas Jambi pada matakuliah praaktikum kimia anorganik. Penelitian ini merupakan jenis quasi eksperimen dengan desain single-group pretest-posttest terhadap kemandirian belajar mahasiswa. Data kemandirian belajar diperoleh dengan menggunakan angket pada sebelum dan sesudah penerapan aplikasi quizwhizzer. Aplikasi quizwhizzer yang diterapkan pada perkuliahan meliputi materi unsur alkali tanah, aluminium dan senyawanya, kimia besi, pembuatan garam mohr. Uji hipotesis menggunakan uji paired samples t test. Hasil penelitian menunjukkan adanya peningkatan kemandirian belajar setelah penerapan sebesar 14,08. Peningkatan tersebut merupakan peningkatan yang signifikan setelah dilakukan uji paired samples t test dengan nilai signifikansi sebesar 0,00. Oleh karena itu pada penelitian ini dapat disimpulkan bahwa penerapan aplikasi quizwhizzer dapat meningkatkan kemandirian belajar khsususnya pada mahasiswa Program Studi Pendidikan Kimia Universitas Jambi kelas R-002 pada mata kuliah praktikum kimia anorganik
Empowering EFL Learners’ Pronunciation Skills through the Employment of ELSA Application
Full text linkAbstract
The constant activation of effective mobile-assisted language learning applications is deemed a necessary step to respond to the dynamic changes in modern communicative learning enterprises. Previous researchers believed that with the accompaniment of sophisticated digital learning media, language learners can potentially transform into more proficient communicators as they have mastered a wide variety of useful language expressions and words to be efficiently integrated into their communication enterprises. This small-scale library study attempted to investigate the usefulness of the ELSA application in empowering EFL learners’ pronunciation skills. As pronunciation is an inseparable element related to the insistent development of communicative skills, the researcher initiated this investigation to encourage second language educators to be more open-minded and technologically literate in utilizing a vast range of relevant technological learning platforms to improve their learners’ speaking proficiency. To achieve the aforesaid study objective, the researcher employed a thematic analysis approach while analyzing the findings from 30 previous ELSA application journal articles. A thematic analysis approach helped the researcher to yield more accurate, robust, and relevant findings as identical findings were grouped into some main themes. The thematically-categorized findings disclosed that the ELSA application enhanced EFL learners’ pronunciation accuracy and pronunciation learning autonomy.
Keywords: MALL, EFL learners, pronunciation, library study, thematic analysis
 
Simulation Study of Small-Scale Electricity Generation Plant Utilizing Flue Gas of Solid Garbage Waste Incineration as Energy Source
Full text linkThis study aims to get an overview of the operational parameters of a small-scale electrical generation plant that utilizes thermal energy included in the flue gases of garbage waste incineration. The organic Rankine cycle (ORC) thermodynamic system was performed to evaluate this system. The organic fluid was used as a heat transfer medium instead of water because it has a low boiling point so it does not require a lot of thermal energy to generate small-scale electric power. Hexane was used as the working fluid and Aspen Hysys was used as a tool to perform simulations. The plant is optimized through the operating temperature, working fluid flow rate, and pressure to obtain electrical output power that can be obtained. The simulation results show that flue gas at a temperature range of 300 to 350 0C can produce electric power in the ranges of 7.84 to 128.6 kW at a working pressure ranges of 2.5 to 7.5 bar, and working fluid flow rate of 3.600 to 10.100 kg/
New Viewpoint Era of Weather Monitoring: Arduino Based Portable Weather Station Design
Full text linkWeather changes play a crucial role in key sectors in Indonesia, such as agriculture and fisheries. However, limited weather data in all regions is an obstacle. This research proposes an innovative Arduino-based weather monitoring instrument that is flexible, economical and increases data availability in Indonesia. The ergonomic and flexible design of the Portable Weather Station allows mobility without dependence on building structures. With real-time monitoring using sensors for temperature, humidity, air pressure, wind speed and wind direction, this tool provides comprehensive information. Field testing shows good operation. The diversity of sensor parameters and efficient design make the Portable Weather Station innovative. Optimizing energy use and integration of advanced technologies, such as remote monitoring and cloud data processing, are recommended. The benefits involve easy and accurate access to weather information, supporting vital sectors. With continuous monitoring and evaluation, the Portable Weather Station has the potential to be an effective solution in dynamic weather monitoring, advancing sectors such as agriculture, fisheries and environmental policy, and creating communities that are more resilient to climate and economic change
PENGARUH DEGRADASI PELUMAS BEKAS MENGGUNAKAN TiO2/ZEOLIT TERHADAP KANDUNGAN Mg DAN Na SECARA FOTOLISIS
Full text linkUsed lubricants are one of the wastes included in B3 waste, used lubricants contain heavy metals that can pollute the environment and are harmful to living things. Used lubricants contain metals, namely Pb, Zn, Ca, Ba, Na and Mg which can damage vehicle engines. The application of the photolysis method using TiO2/Zeolite catalysts can degrade Mg and Na metals in used lubricants. This study aims to determine the effect of using TiO2/Zeolite catalysts on the degradation of used lubricants by the photolysis method. Analysis of Mg and Na metal content in used lubricants was measured using an Atomic Absorption Spectrophotometer (AAS). Analysis of used lubricants before and after adsorption with Fourier Transform Infrared (FTIR). Characterization of TiO2/Zeolite before and after degradation using X-Ray Diffraction (XRD). The research obtained the optimum conditions for the degradation of Mg and Na metals in used lubricants, namely the optimum degradation time for Mg and Na metals is 15 minutes, the optimum amount of catalyst for degradation for Mg and Na metals is 0.4 grams, and the optimum volume of used lubricant for the degradation of Mg and Na metals is 10 mL with a large percentage of degradation of 83.37% Mg and 74.98% Na. Characterization of TiO2/Zeolite using XRD showed no change in the structure of TiO2/Zeolite. Based on these data, it can be said that the TiO2 catalyst supported by zeolite can be used to degrade Mg and Na metals in used lubricants. Characterization of used lubricants using FTIR showed a shift in wave numbers before and after degradation which indicated a degradation process.
Pelumas bekas merupakan salah satu limbah yang termasuk dalam limbah B3, pelumas bekas mengandung logam berat yang dapat mencemari lingkungan dan berbahaya bagi makhluk hidup. Pelumas bekas mengandung logam yaitu Pb, Zn, Ca, Ba, Na dan Mg yang dapat merusak mesin kendaraan. Penerapan metode fotolisis dengan menggunakan katalis TiO2/Zeolit dapat mendegradasi logam Mg dan Na pada pelumas bekas. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan katalis TiO2/Zeolit terhadap degradasi pelumas bekas dengan metode fotolisis. Analisis kandungan logam Mg dan Na pada pelumas bekas diukur dengan menggunakan alat Spektrofotometer Serapan Atom (AAS). Analisis pelumas bekas sebelum dan sesudah adsorpsi dengan Fourier Transform Infrared (FTIR). Karakterisasi TiO2/Zeolit sebelum dan sesudah degradasi menggunakan X-Ray Diffraction (XRD). Dari penelitian ini diperoleh kondisi optimum untuk degradasi logam Mg dan Na pada pelumas bekas, yaitu waktu degradasi optimum untuk logam Mg dan Na adalah 15 menit, jumlah katalis optimum untuk degradasi logam Mg dan Na adalah 0,4 gram, dan volume pelumas bekas yang optimum untuk degradasi logam Mg dan Na adalah 10 mL dengan besar persen degradasi 83,37% Mg dan 74,98% Na. Karakterisasi TiO2/Zeolit dengan menggunakan XRD menunjukkan tidak adanya perubahan struktur TiO2/Zeolit. Berdasarkan data tersebut dapat dikatakan bahwa katalis TiO2 yang didukung oleh zeolit dapat digunakan untuk mendegradasi logam Mg dan Na pada pelumas bekas. Karakterisasi pelumas bekas menggunakan FTIR menunjukkan adanya pergeseran bilangan gelombang sebelum dan sesudah degradasi yang mengindikasikan adanya proses degradasi