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DAMPAK PENGGUNAAN LAHAN TERHADAP STOK KARBON DI TANAH GAMBUT: STUDI PERBANDINGAN DAN IMPLIKASI KEBIJAKAN Ilmi, Rozatul; Hermansah; Yulnafatmawita; Yasin, Syafrimen
JTSL (Jurnal Tanah dan Sumberdaya Lahan) Vol. 13 No. 1 (2026)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2026.013.1.1

Tropical peatlands are among the largest carbon stocks on earth, but also the most vulnerable to anthropogenic disturbances. This study aims to analyze the impacts of land-use change on carbon stocks in peatlands, focusing on conversion to plantations, agriculture, and infrastructure, as well as to evaluate the effectiveness of restoration strategies and protection policies. Using a systematic review approach of 50 recent scientific publications (2010–2025), the results show that peatland conversion causes large amounts of carbon release, ranging from 70–120 tons of CO₂ per hectare per year, accompanied by land subsidence of up to 7 cm per year. Drainage and land fires are the main factors accelerating carbon emissions. In contrast, restoration efforts through rewetting and revegetation have been shown to reduce emissions by up to 65% and increase long-term carbon accumulation. The success of this strategy is greatly influenced by the biophysical conditions of the land, policy support, and local community participation. This study recommends the need for an integrated approach that includes moratoriums, economic incentives, legal strengthening, and technology-based monitoring as strategic steps in protecting carbon stocks and mitigating climate change.

Critical Thinking Of Students In Solving Ill-Structured Mathematical Problems: A Scoping Review Nursyafiqoh Undaresta, Sheren; Maliah Ahmad, Ros; Nur Aini, Aida; Hanggara, Yudhi; Hermansah; Hartanto, Suryo; Shalehoddin
Pi: Mathematics Education Journal Vol. 9 No. 1 (2026): April
Publisher : Program Studi Pendidikan Matematika Universitas PGRI Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/pmej.v9i1.13220

This study highlights the importance of developing critical thinking skills in modern mathematics, particularly when students face ill-structured problems. Using a scoping review method, the research followed five stages: formulating research questions, identifying relevant articles, removing duplicates, mapping data, and summarizing findings. Data were collected from Google Scholar, Publish or Perish, and Connected Papers, covering publications from 2015 to 2025. Based on the PRISMA selection process, 20 relevant articles were analyzed. The findings reveal that students’ critical thinking and mathematical problem-solving abilities in ill-structured contexts are still relatively low. Many students struggle with key aspects of critical thinking, such as verifying information, conducting in-depth analysis, and reflecting on their solutions. These limitations indicate that students are not yet fully equipped to handle complex, open-ended mathematical problems. Thematic analysis shows a shift in research focus over time. Between 2015 and 2020, studies primarily identified students’ difficulties and barriers. However, from 2021 to 2025, research has increasingly emphasized the development of higher-order thinking skills (HOTS), numeracy literacy, and preparedness for the Industrial Revolution 4.0. The study recommends future research to explore innovative learning interventions that integrate creativity, critical thinking, and ill-structured problem-solving.

Critical Thinking Of Students In Solving Ill-Structured Mathematical Problems: A Scoping Review Nursyafiqoh Undaresta, Sheren; Maliah Ahmad, Ros; Nur Aini, Aida; Hanggara, Yudhi; Hermansah; Hartanto, Suryo; Shalehoddin
Pi: Mathematics Education Journal Vol. 9 No. 1 (2026): April
Publisher : Program Studi Pendidikan Matematika Universitas PGRI Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/pmej.v9i1.13220

This study highlights the importance of developing critical thinking skills in modern mathematics, particularly when students face ill-structured problems. Using a scoping review method, the research followed five stages: formulating research questions, identifying relevant articles, removing duplicates, mapping data, and summarizing findings. Data were collected from Google Scholar, Publish or Perish, and Connected Papers, covering publications from 2015 to 2025. Based on the PRISMA selection process, 20 relevant articles were analyzed. The findings reveal that students’ critical thinking and mathematical problem-solving abilities in ill-structured contexts are still relatively low. Many students struggle with key aspects of critical thinking, such as verifying information, conducting in-depth analysis, and reflecting on their solutions. These limitations indicate that students are not yet fully equipped to handle complex, open-ended mathematical problems. Thematic analysis shows a shift in research focus over time. Between 2015 and 2020, studies primarily identified students’ difficulties and barriers. However, from 2021 to 2025, research has increasingly emphasized the development of higher-order thinking skills (HOTS), numeracy literacy, and preparedness for the Industrial Revolution 4.0. The study recommends future research to explore innovative learning interventions that integrate creativity, critical thinking, and ill-structured problem-solving.

PENGARUH DISIPLIN KERJA DAN LINGKUNGAN KERJA TERHADAP KINERJA PEGAWAI PADA PUSKESMAS KECAMATAN PESANGGRAHAN JAKARTA SELATAN Hermansah
Jurnal Menara Vol. 1 No. 2 (2024): September 2024
Publisher : Al Hasanah Barokah Foundation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65978/jm.v1i2.9

This study aims to determine the effect of work discipline and work environment on the performance of Puskesmas Pesanggrahan South Jakarta employees. The research method used is descriptive associative with a total sample population of 64 respondents. Methods of data collection using a questionnaire. The analysis used includes: validity test, reliability test, classical assumption test, correlation coefficient test, coefficient of determination test, simple linear regression test, t-test and F-test. The results of the partial test (t-test) obtained that work discipline and work environment partially have a significant effect on employee performance. The results of the simultaneous test show that discipline affects the performance of the regression equation Y = 17.934 + 0.549X1, the correlation coefficient is 0.613, meaning that the two variables have a strong relationship. The value of determination or contribution of influence is 0.624 or 62.4% the work environment affects the performance of the regression equation Y = 21.127 + 0.465X2, the correlation coefficient of 0.593 means that the two variables have a strong relationship level. The value of determination or contribution of influence is 0.649 or 64.9% work discipline and work environment together have a significant effect on employee performance with a calculated F value > F table or (36.831 > 2.760). This is reinforced by the multiple linear regression equation Y = 18.224 + 0.395X1 + 0.147X2. While the contribution of work discipline and work environment variables to employee performance is 57.6%.

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