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All Journal JURNAL AIR INDONESIA Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Ilmiah Mandala Education (JIME) Jurnal Ilmiah Profesi Pendidikan Jurnal Pendidikan dan Pembelajaran Indonesia (JPPI) BAHTRA: Jurnal Pendidikan Bahasan dan Sastra Innovative: Journal Of Social Science Research Jurnal Ilmiah Pengabdian dan Pemberdayaan Masyarakat
A. Haris
Jurusan Kimia, Fakultas Sains dan Matematika Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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CORRELATION BETWEEN BIOMASS CONCENTRATION AND EXTENT OF SULPHATE REDUCTION IN AN ACIDOGENIC REACTOR Haris, A.; Pullammanappallil, P. C.; Keller, J.
Jurnal Air Indonesia Vol. 6 No. 1 (2010): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (203.716 KB) | DOI: 10.29122/jai.v6i1.2443

Abstract

Two stage high rate anaerobic treatment systems comprising of an acidogenic reactor (or equalisation/ buffer tank) followed by a methanogenic reactor are becoming increasingly popular to treat high strength wastewater from industries.  In these systems, sulphate present in the wastewater is reduced to sulphide either partially or completely in the acidogenic reactor and completely in the methanogenic reactor.  The effect of fermentation products on the extent of sulphate reduction in the acidogenic reactor was investigated in a continuously-fed, well mixed laboratory-scale 3 L fermenter operating at a temperature of 35oC and pH of 6.  The feed was based on either glucose or molasses as the carbon source.  It was observed that as the carbohydrate concentration in feed was increased sulphate reduction was suppressed.  It was confirmed that volatile organic acids like acetic, propionic and butyric acids, hydrogen and residual glucose did not cause inhibition of sulphate reduction.  However, biomass concentration correlated negatively with extent of sulphate reduction.  This correlation was expressed mathematically and the same expression with the same parameters adequately predicted the effect of biomass concentration on extent of sulphate removal for both steady state and transient data irrespective of glucose or molasses feed.  It was seen from the best fit of this expression that a biomass concentration of 3300 mg-COD.L-1 would completely repress sulphate reduction in the acidogenic reactor.  Even when sulphate removal was suppressed the presence of sulphate reducing bacteria (SRB) in the reactor was confirmed through Fluorescent In Situ Hybridisation (FISH) visualisation.  Moreover, the numbers of SRB seemed to increase with carbohydrate concentration in feed.  It was speculated the suppression of sulphate removal might be due to a switch in function of SRB from sulphate reducing to fermentation or acetogenesis.    Keywords: sulphate reducing bacteria, anaerobic digestion, inhibition, sulphate reduction, acidogenic reactor, high rate anaerobic treatment
CORRELATION BETWEEN BIOMASS CONCENTRATION AND EXTENT OF SULPHATE REDUCTION IN AN ACIDOGENIC REACTOR Haris, A.; Pullammanappallil, P. C.; Keller, J.
Jurnal Air Indonesia Vol. 6 No. 1 (2010): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jai.v6i1.2443

Abstract

Two stage high rate anaerobic treatment systems comprising of an acidogenic reactor (or equalisation/ buffer tank) followed by a methanogenic reactor are becoming increasingly popular to treat high strength wastewater from industries.  In these systems, sulphate present in the wastewater is reduced to sulphide either partially or completely in the acidogenic reactor and completely in the methanogenic reactor.  The effect of fermentation products on the extent of sulphate reduction in the acidogenic reactor was investigated in a continuously-fed, well mixed laboratory-scale 3 L fermenter operating at a temperature of 35oC and pH of 6.  The feed was based on either glucose or molasses as the carbon source.  It was observed that as the carbohydrate concentration in feed was increased sulphate reduction was suppressed.  It was confirmed that volatile organic acids like acetic, propionic and butyric acids, hydrogen and residual glucose did not cause inhibition of sulphate reduction.  However, biomass concentration correlated negatively with extent of sulphate reduction.  This correlation was expressed mathematically and the same expression with the same parameters adequately predicted the effect of biomass concentration on extent of sulphate removal for both steady state and transient data irrespective of glucose or molasses feed.  It was seen from the best fit of this expression that a biomass concentration of 3300 mg-COD.L-1 would completely repress sulphate reduction in the acidogenic reactor.  Even when sulphate removal was suppressed the presence of sulphate reducing bacteria (SRB) in the reactor was confirmed through Fluorescent In Situ Hybridisation (FISH) visualisation.  Moreover, the numbers of SRB seemed to increase with carbohydrate concentration in feed.  It was speculated the suppression of sulphate removal might be due to a switch in function of SRB from sulphate reducing to fermentation or acetogenesis.    Keywords: sulphate reducing bacteria, anaerobic digestion, inhibition, sulphate reduction, acidogenic reactor, high rate anaerobic treatment
EKSPLORASI NILAI-NILAI SOSIAL DALAM SASTRA LISAN MASYARAKAT DONGGO KABUPATEN BIMA Abimanyu, Dwi Yanto; Ikra, Ikra; Haris, A.
BAHTRA: Pendidikan Bahasa dan Sastra Vol 5, No 02 (2024): November 2024
Publisher : STKIP Harapan Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56842/bahtra.v5i02.630

Abstract

This study aims to explore the social values embedded in the oral literature of the Donggo community, Bima Regency. The underlying issue of this research is the limited number of studies on how oral literature functions as a medium for transmitting social values within the Donggo indigenous community. Using a qualitative approach, this research employs a descriptive-analytical method with data collected through in-depth interviews and participatory observation. The data were thematically analyzed to identify key social values contained in the oral narratives. The findings indicate that Donggo oral literature is rich in social values, with cooperation, wise leadership, and social harmony emerging as dominant themes. The value of cooperation is reflected in 32% of the analyzed stories, while leadership and social harmony appeared in 24% and 20% respectively. These findings demonstrate that oral literature plays a crucial role in reinforcing social solidarity and maintaining order within the community. This study concludes that Donggo oral literature serves not only as entertainment but also as an instrument for preserving socially relevant values in the lives of the people. The results of this study can serve as a foundation for the preservation of oral traditions and the development of character education based on local culture.
Digital Based Literacy Learning Integration to Increase The Appreciation and Creativity of High School Students Farniati, Farniati; Arwan, Arwan; Haris, A.
Jurnal Ilmiah Profesi Pendidikan Vol. 10 No. 3 (2025): Agustus
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jipp.v10i3.3912

Abstract

This study aims to examine the effectiveness of digital-based literary learning in enhancing high school students’ literary appreciation and creativity. The background of the study lies in the low student interest in literary learning, which is often delivered using conventional methods with limited media integration. This research employed a mixed-methods approach with an embedded design, combining quantitative data from pretests and posttests with qualitative data from observations and interviews. The intervention was conducted over four sessions using digital platforms such as Canva and Padlet to support both literary appreciation and creative production. The paired sample t-test results showed a significant improvement between pretest and posttest scores, indicating the effectiveness of the digital approach. Moreover, qualitative findings revealed that students were more enthusiastic, expressive, and engaged throughout the learning process. In conclusion, digital literary learning is an innovative instructional approach that responds to the challenges of modern literacy and is highly recommended for broader implementation in secondary education.
Karakterisasi Struktur Bawah Permukaan Menggunakan Inversi Data Gravitasi di Cekungan Ombilin Fitria; Haris, A.; Rinaldo
Jurnal Penelitian Pendidikan IPA Vol 11 No 8 (2025): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.11762

Abstract

The Ombilin Basin in West Sumatra is one of the oldest intermontane basins in Indonesia that has significant geological potential, especially in relation to coal content and possible petroleum systems. This study uses a three-dimensional gravity inversion method to model the distribution of subsurface density from a depth of 0 to 6000 meters. The purpose of this study is to examine the subsurface geological modeling in the Ombilin Basin and to be a reference in exploration geophysical studies in other basins in Indonesia that have similar characteristics. Corrected regional gravity data are used as input in the inversion process to reconstruct the relative density model of rocks. The inversion results show a low-density zone (Δg between -0.1995 to -0.0099 gr/cc) in the central and southwest parts of the basin associated with sedimentary deposits such as sandstone, shale, and coal. At depths of more than 4000 meters, a high-density zone is identified that reflects the presence of basement rocks or possible magmatic intrusions. This density distribution strengthens the understanding of the basin geometry and potential hydrocarbon traps. This study shows that the gravity inversion method is an effective and economical approach for subsurface geological interpretation, especially in areas with limited exploration data.
Implementasi Model Pembelajaran Discovery Tematik pada Siswa Kelas XII SMA Kae Woha dalam Membentuk Kreativitas Menulis Puisi di Era VUCA Haris, A.; Fadli, Bagus Muhammad; Yani, Muhammad; Subhan, Subhan
Jurnal Pendidikan dan Pembelajaran Indonesia (JPPI) Vol. 4 No. 4 (2024): Jurnal Pendidikan dan Pembelajaran Indonesia (JPPI), 2024 (4)
Publisher : Yayasan Pendidikan Bima Berilmu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53299/jppi.v4i4.735

Abstract

Penelitian ini bertujuan untuk menelaah dan mendeskripsikan implementasi model pembelajaran Discovery Tematik pada siswa kelas XII SMA Kae Woha dalam membentuk kreativitas menulis puisi di era VUCA. Penelitian ini berjenis kualitatif dengan menggunakan metode deskriptif. Data penelitian ini berupa kata, frasa, dan kalimat yang menggambarkan unsur batin, fisik, baris, dan isi puisi. Sumber data primer berasal dari siswa kelas XII IPA 1 dan IPA 2 SMA Kae Woha berupa karya puisi. Sumber data sekunder bersumber dari ahli materi dan model pembelajaran, jurnal dan buku. Teknik pengumpulan data menggunakan teknik observasi, wawancara, dokumentasi, dan eksperimen semu untuk mendapatkan data unsur fisik, batin, baris, dan isi puisi. Penelitian ini menggunakan teknik analisis data interaktif dan deskriptif analisis kualitatif. Hasil penelitian menunjukkan implementasi model pembelajaran Discovery Tematik pada siswa kelas XII SMA Kae Woha dalam membentuk kreativitas menulis puisi di era VUCA sangat membentuk kreativitas penulisan puisi dalam unsur fisik, batin, baris, dan isi puisi. Unsur fisik meliputi tipografi, diksi, imaji, kata konkret, bahasa figurasi, verifikasi, ritme, dan mentrum. Unsur batin berupa tema, feeling, nada, dan amanat. Unsur baris meliputi distikon, terzina, kuatrin, kuin, sekstet, septima, stanza, dan soneta. Adapun kreativitas dalam penulisan isi puisi berhubungan dengan ode, himne, elegi, epigram, satire, ballada, dan romansa. Implementasi model pembelajaran Discovery Tematik secara kuantitats dapat meningkatkan nilai siswa. Sebanyak 21 siswa, 16 siswa telah memenuhi nilai KKM dengan mendapatkan nilai 75, 80, 85, dan 90 dengan presentase 78,38095 dari dari indikator pencapaian sebesar 75%. Tiga siswa masih mendapatkan nilai di bawah KKM dengan nilai 65.
Language Development of Children aged 6-8 years in the Rato Village Community, Manggengula Hamlet, Bolo District, Bima Regency Dimas, Dimas; Haris, A.; Ikra, Ikra; Arwan, Arwan
Jurnal Ilmiah Mandala Education (JIME) Vol 10, No 4 (2024): Jurnal Ilmiah Mandala Education (Oktober)
Publisher : Lembaga Penelitian dan Pendidikan Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/jime.v10i4.7563

Abstract

This study aimed to determine and observe children's language development in Rato Village, Bolo District, Bima Regency. This research is qualitative research using qualitative descriptive methods. Data is analyzed based on theories and phenomena from the aspects studied. The data used in this research are sentences spoken by children aged 6-8 years in Rato village. The data source used in this research comes from daily conversations of 6 children aged 6-8 in Manggengula hamlet, Rato village. Data comes from journals and books as theories relevant to this research. The data collection techniques used in this research are observation and documentation. The data analysis technique in this research uses descriptive analysis techniques. The researchers' results found that the language development of children aged 6-8 years in the Rato Village Community, Manggengula Hamlet, Bolo District, Bima Regency is not the same. Language is learned through habituation from the environment and is the result of the imitation of adults. Language is something that is acquired naturally. Some factors influence the acquisition of a second language in children, namely: the age factor, because when you are still a child it will be easier to acquire a second language; the first language factor (mother), because the first language greatly influences the grammar of other languages; environmental factors, the environment is a very important factor for children's language acquisition because children aged up to 6 years will acquire and speak the language they often hear from the environment, especially family, friends and the community
Kesalahan Tanda Baca Pada Hasil Tugas Siswa Dalam Materi Teks Eksplanasi Kelas XI Jurusan TKJ SMK Taman Madya Baiturrahman Bima Subhan, Subhan; Haris, A.; Arwan, Arwan; Fadli, Bagus Muhammad
Innovative: Journal Of Social Science Research Vol. 5 No. 1 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i1.17492

Abstract

Punctuation errors in the results of student assignments at SMK Taman Madya Baiturrahman Bima are often found. These errors are reviewed to see the underlying factors. Based on that, the objectives of this study are 1) to describe the forms of punctuation errors in the results of student assignments in the explanatory text material for class XI TKJ Department of SMK Taman Madya Baiturrahman Bima, and 2) to examine the factors that influence punctuation errors in the results of student assignments in the explanatory text material for class XI TKJ Department of SMK Taman Madya Baiturrahman Bima. This study is a qualitative study using a qualitative descriptive method. The data for this study are sentences related to punctuation errors. The data source comes from teachers and students of class XI TKJ Department at SMK Taman Madya Baiturrahman Bima. The data collection techniques used are observation, assignments, interviews, and documentation. The data analysis technique for this study uses descriptive analysis techniques. The results of this study are (1) the forms of punctuation errors in the explanatory text assignments of class XI students majoring in Computer and Network Engineering at SMK Taman Madya Baiturrahman Bima include period punctuation, comma punctuation, colon punctuation, and hyphen; (2) the factors that influence punctuation errors in the explanatory text assignments of class XI students majoring in Computer and Network Engineering at SMK Taman Madya Baiturrahman Bima are caused by low student interest and motivation towards learning, varying levels of student cognitive ability, different student memories, lack of student understanding regarding punctuation, the surrounding environment that does not support learning, complicated teacher explanations, lack of time in learning, students' habits of not paying attention during learning, students' lack of self-confidence, and lack of student accuracy in placing punctuation.
Analisis Kemampuan Literasi Membaca Pada Siswa Kelas V Di SDN Inpres Simpasai Kecamatan Lambu Kabupaten Bima Ariani, Ariani; Salahuddin, Muhammad; Haris, A.; Juliawan, Rizcky
Innovative: Journal Of Social Science Research Vol. 5 No. 1 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i1.17496

Abstract

Reading literacy skills at SDN Inpres Simpasai, Lambu District, Bima Regency are still low due to the lack of motivation from parents and from several other factors. The purpose of this study is to study and describe students' reading literacy skills as measured through reading literacy indicators in grade V students at SDN Inpres Simpasai. This type of research is a qualitative research using a descriptive method. This research data is in the form of words, sentences, and paragraphs. The data was sourced from teachers and students of grade V at SDN Inpres Simpasai, the cematan lambu of Bima Regency. The data collection techniques in this study include observation, interview, and documentation techniques. The data analysis technique uses Miles and Huberman's descriptive and interactive analysis techniques. Based on the results of the analysis, it can be concluded that students' reading literacy skills are good. Reading skills can be categorized into four categories, (1) the category of poor reading can be 1 student with a percentage of 2.94%, (2) quite good there are 3 students with a percentage of 9.82%, (3) good there are 12 students with a percentage of 36.29%, and (4) very good there are 18 students with a percentage of 53.94%. Reading comprehension ability includes indicators (1) not understanding the text read, there are 6 students with a percentage of 17.64%, (2) very low reading ability, there is 1 student with a percentage of 2.94%, (3) difficulty concentrating in reading letters or words, there are 5 students with a percentage of 14.70%, (4) lack of understanding punctuation, there are 6 students with a percentage of 17.64%, (5) unable to explain the text read, there were 8 students with a percentage of 23.52%, (6) difficulty remembering the text read,there were 8 students with a percentage of 23.52%.
Bahasa Inggris Rinaldo; Haris, A.
Jurnal Penelitian Pendidikan IPA Vol 11 No 4 (2025): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i4.10911

Abstract

The North Sumatra Basin is one of the major sedimentary basins in Indonesia with significant hydrocarbon potential. However, exploration in this region faces challenges due to overpressure, which can increase operational risks such as blowouts. This study aims to analyze pore pressure and overpressure formation mechanisms in Well Al using the Eaton method and a crossplot approach between sonic and density data. The analysis results indicate that the top overpressure is identified at a depth of 8,500 ft in the Keutapang Formation and continues into the Baong, Bampo, and Parapat Formations. Wireline log evaluation indicates anomalies in the sonic, neutron, and density logs, which are consistent with disequilibrium compaction patterns. The Dutta crossplot results also confirm the dominance of smectite minerals without transformation into illite, reinforcing that the primary overpressure mechanism is loading due to disequilibrium compaction. Accurate pore pressure modeling is necessary to improve drilling safety and efficiency in this area.
Co-Authors Abimanyu, Dwi Yanto Anggi, Michael Ariani Ariani Arwan Arwan Dimas, Dimas Fadli, Bagus Muhammad Farniati, Farniati Fitria Ikra, Ikra J. Keller Juliawan, Rizcky Muhammad Salahuddin Muhammad Yani, Muhammad Muslimin Muslimin Pullammanappallil, P. C. Rahmawan, Ardi Rinaldo Said Sabbeq, Said Subhan Subhan Yudanur, Andhira Djafniel