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All Journal International Journal of Evaluation and Research in Education (IJERE) MEDIA PETERNAKAN - Journal of Animal Science and Technology Jurnal Ilmu Pertanian Indonesia Jurnal Teknologi Dan Industri Pangan Jurnal Teknologi Industri Pertanian Jurnal Silvikultur Tropika (JST) Buletin Peternakan Pastura; Journal Of Tropical Forage Science Jurnal Veteriner Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Ilmu Ternak Jurnal Ilmiah Aplikasi Isotop Radiasi BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Ilmu Komputer dan Agri-Informatika Jurnal Sain Peternakan Indonesia JURNAL PETERNAKAN WARTAZOA Indonesian Bulletin of Animal and Veterinary Sciences Journal of the Indonesian Tropical Animal Agriculture Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) JITRO (Jurnal Ilmiah dan Teknologi Peternakan Tropis) Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan Warta IHP (Warta Industri Hasil Pertanian) Jurnal Biodjati Animal Production : Indonesian Journal of Animal Production Jurnal Pendidikan Islam Tropical Animal Science Journal Jurnal Ilmu Nutrisi dan Teknologi Pakan Jurnal Kimia Terapan Indonesia BAREKENG: Jurnal Ilmu Matematika dan Terapan Edukasi Islami: Jurnal Pendidikan Islam Jurnal Nutrisi Ternak Tropis dan Ilmu Pakan Jurnal Ilmu Peternakan Terapan Tadarus Tarbawy : Jurnal Kajian Islam dan Pendidikan PETERPAN (Jurnal Peternakan Terapan) Journal of Applied Agricultural Science and Technology Livestock and Animal Research Jurnal Kedokteran Hewan Policy Brief Pertanian, Kelautan, dan Biosains Tropika Jurnal Pendidikan Islam Jurnal Agripet Animal Production
Anuraga Jayanegara
Department Of Nutrition And Feed Technology, Faculty Of Animal Science, Bogor Agricultural University, Bogor, 16680, Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Transportation Veterinary Other

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WHOLE LIFE INSURANCE UTILIZING THE COMMISSIONERS METHOD AND THE VASICEK INTEREST RATE MODEL FOR PREMIUM RESERVE ANALYSIS Romantica, Krishna Prafidya; Johan, Arsyelina Husni; Jayanegara, Anuraga; Leo, Jason Filbert
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 20 No 2 (2026): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol20iss2pp1001-1018

Abstract

Premium reserves play a vital role in ensuring that insurance firms can meet their future obligations to policyholders. Traditional fixed-rate approaches often fail to reflect market volatility, leading to potential misestimations. This study addresses this gap by integrating the Commissioners Method with the Vasicek stochastic interest rate model to evaluate premium reserves for whole life insurance. The research hypothesizes that the Vasicek model provides more realistic reserve estimates than fixed-rate models, that payment frequency and behavioral preferences significantly affect reserve levels, and that gender-specific mortality impacts reserve adequacy. Using BI-7D-RR interest rate data from 2019–2024, Vasicek parameters were calibrated and applied to reserve calculations. A sensitivity analysis was conducted by varying the model’s mean reversion, volatility, and long-term mean parameters. The results confirm that Vasicek-based reserves are more robust and realistic than fixed-rate estimates. Incorporating a DARA utility function adds behavioral realism, while payment frequency strongly influences reserve accumulation. Gender-specific mortality produces systematically higher reserves for male policyholders. Sensitivity analysis highlights the model’s robustness, with reserves responding predictably to parameter changes. This research contributes theoretically by linking stochastic modeling, demographics, and behavioral economics, while providing practical guidance for insurers to strengthen reserve adequacy and financial resilience under uncertainty.
TEA SAPONIN MODULATES IN VITRO RUMEN FERMENTATION PROFILE AND REDUCES METHANE PRODUCTION: A META-ANALYSIS Yanza, Yulianri Rizki; Mahmudah, Nurhayatun; Hidayat, Cecep; Jayanegara, Anuraga; Fitri, Ainissya; Ramadhani, Fitri; Syarifah, Hindun; Basri Jumin, Hasan; Andrian, Dedek; Melissa, Melissa; Fauziah, Nurul; Adhar Effendi, Leo
BIOTROPIA Vol. 30 No. 1 (2023): BIOTROPIA Vol. 30 No. 1 April 2023
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2023.30.1.1805

Abstract

Saponins are secondary plant metabolites binding hydrophobic non-sugar components that can reduce ruminant methane (CH4) production. Previous studies revealed that tea saponin is one of the common sources of saponins used to reduce enteric CH4 production. However, the effect of different levels of dietary tea saponin on rumen fermentation remains inconclusive. This study aimed to investigate the effect of tea saponin on in vitro rumen fermentation and methane production through a meta-analysis approach. A total of 6 articles were selected and included in the meta-analysis database, continued by the statistical analysis using SAS software through mixed model formula. The results showed that tea saponin levels lowered in vitro organic matter degradability (IVOMD) and in vitro dried matter degradability (IVDMD; P=0.01) by a linear response. Furthermore, increased tea saponin levels in the diet reduced enteric CH4 emission expressed as CH4/DM substrate and CH4/IVOMD by a quadratic (P=0.01) and a linear response (P=0.04), respectively. Increased tea saponin levels also tended to decrease gas production linearly (P=0.08). Tea saponins inclusion also decreased pH levels linearly (P=0.04) but increased NH3 quadratically (P=0.01). Moreover, total VFA concentration in the rumen also raised quadratically, followed by the increased acetate (C2) and propionate (C3) proportion by a linear response (P<0.05). As a result, the C2/C3 ratio was decreased in a linear response (P=0.01) by the increased tea saponin levels, where the protozoa population was also diminished by a quadratic response (P=0.01). In conclusion, tea saponin levels directly reduced enteric CH4 production by diminishing microbial populations.
Evaluation of Bio-Drying Cow Dung with Inoculation of Bacillus sp. as Refuse Derived Fuel (RDF) Material Febriantoko, Ardiansah; Jayanegara, Anuraga; Sholeha, Novia Amalia; A'yuni, Qurrota
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 23, No 1 (2026): March 2026
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v23i1.15-25

Abstract

Global warming, driven in part by livestock manure emissions, poses a major environmental challenge. Refuse Derived Fuel (RDF) offers a waste-to-energy solution by converting solid cow manure into an energy source. This study investigated the impact of Bacillus sp. inoculation on the biodrying process of cow dung. The main challenge in processing cow manure into RDF is ensuring that the moisture content and calorific value meet the minimum RDF standards. Therefore, a biodrying process was carried out on cow manure to achieve these required standards. Biodrying performance was assessed based on drying time, moisture content, pH, and calorific value. The results show that inoculation with Bacillus sp.. The results showed that inoculation with Bacillus sp. at 10⁶ log cfu ml⁻¹ kg⁻¹ yielded the most efficient outcome, achieving the fastest drying time (12 days), lowest moisture content (9.64%), optimal pH (7.8), and highest calorific value (2,656.5 kcal/kg). These findings confirm a direct link between moisture reduction and calorific improvement. Hence, bio-dried cow dung treated with inoculation of Bacillus sp. 106 log cfu ml-1 Kg-1 is recommended as a viable RDF material.
Co-Authors A S Tjakradidjaja A Sofyan A. A. Affan A. A. Samsudin A. A. Samsudin A. Anggraeny A. Atabany, A. A. E. Suryani A. Fitri A. GUNAWAN A. Ikhwanti A. Irawan A. Salleh A. Sofyan A. Sofyan A. Sofyan A. Sudarman A. T. Wahyudi A.K. Takyi A.O. Salih Abdulmana, Sahidan Achmadi, S. S. Aditya Wahyu Nugraha Aditya, S. Adli, D. N. Adriana, Savira Astri Afandi, Frendy Ahmad Afifah, Amalia Ahmad Sofyan Ahmad Sofyan Ahmad Sofyan Allaily Tarman Almira Firna Fitrianti Ludfi Alya Nur Zahra Amin, M. F. Amirul, F. M. A. Andrian, Dedek Anjas Asmara Samsudin Annisa Imran Ardani, V. Arief Sabdo Yuwono Arief, I. I. Asep Sudarman Awistaros Angger Sakti Ayinda, R. S. K. Ayu Septi Anggraeni Aziz Kustiyo Bambang Pramudya Noorachmat, Bambang Pramudya Basri Jumin, Hasan Budi Tangendjaja C. Hidayat C. SUMANTRI Cecep Hidayat Chung, T K D M Sinaga D. A. Astuti D. A. Astuti D. A. Astuti D. Setiawan D.A. Astuti DA Astuti DADIK PANTAYA Daulai, M. S. Dayat Dayat, Dayat Dede Rosyada Dedy Supriadin Desrial DEWI APRI ASTUTI Dias Indrasti Didid Diapari Diky Ramdani Dwinarto, Bondan E B Laconi E B Laconi E Palupi E Wina E. B. Laconi E. B. Laconi E. B. Laconi E. B. Laconi, E. B. E. Damayanti E. Wina E. Wina E.B. Laconi E.M. Hoffmann Effendi, Leo Adhar Elfawati Endang Warsiki Endrawati, Yuni Cahya Eneh Maesaroh Erica B. Laconi Erika B. Laconi Eylen Desy Novita Fahmi, Melta Rini FARAH FAHMA Fauzan, RM Muhammad Nur Febriantoko, Ardiansah Febrina, D. Fhonna, Fenda Alvionita Fitri Ramadhani Fitri, Ainissya Gumilang Khairulli H. A. Hassim H. A. Hassim, H. A. H. Herdian H. Julendra H. Matsui H. P S Makkar H.P S Makkar H.P.S. Makkar H.P.S. Makkar Hanny Hafiar Harahap, R. S. Hari Agung Adrianto Harningsih, Intan Sri Hasanah, Q. N. Hazen, K. Hendra Herdian Hendra Herdian Heri Ahmad Sukria Heru Nugraha Hindun Syarifah, Hindun I G Permana I Komang Gede Wiryawan I. G. Permana I. Ikhsan Ikhwan Shodiq Syifaudin ILHAM Iman Hernaman Indah Wijayanti Irawan Sugoro Irawan, A. Ismail Marzuki Ismail Marzuki Isnaini Dafri J. Nomura Johan, Arsyelina Husni Juniati, Indira K Becker K. A. Sarwono K. Becker K. Becker K. G. Wiryawan K. Nur, K. Khasrad . Krisnan, Rantan Kusuma, R. I. L. Abdullah L. Abdullah L. Abdullah L. Khotijah Laconi, Erika Budiarti Lendrawati Lendrawati Lendrawati, L. Leo, Jason Filbert Listyarini, K. M. Abdelbagi M. Adhyatma M. Kondo M. M. Sholikin M. Makmur M. Zamri-Saad Mafrika Ria Gita Solaya Mahmudah, Nurhayatun Martin, Rima Shidqiyya Hidayati Mauluddin, Dadan Mazlan, N. A. Melissa Melissa Milana Abdillah Subarkah Mira Andriani Mohamad Yamin Muhammad Alam Firmansyah Muhammad Arpah Muhammad Ridla Muis, Nurmaya Rahmawati Mukhtarom, Asrori Mulianda, R. Mutiara Rizky Raisa N. Laylli Nahri Idris Nahrowi Nahrowi Nahrowi Nanang Krisnawan Nanang Krisnawan Neni Sintawardani Nisrina, Aufa Novandri, B. Novia Qomariyah Nugraha Edhi Suyatma Nur Rochmah Kumalasari Nurfitriani, R. A. Nurrul Suri Aulia Nurul Fauziah Nurul Fitri Sari P. Yuliana Permana, I G Prameswara, Jordi Aditiya Prameswari, Febrina Pratama Satria, Borneo Pratama, Said Mirza Pristian Yuliana Pudji Muljono Qomariah, N. Qomariyah, Novia Qomariyah, Novia Qurrota A’yuni R A Nurfitriani R Ridwan R. Hana Nurfitrian Adjie R. K. Rusli R. P. Harahap R. P. Harahap R. Priyanto R. Ridwan R. S. H. Martin R. Solfaine Rahmatillah, Ririn Siti Raihan Raihan, Raihan Rakhmad Perkasa Harahap Rantan Krisnan Rardniyom, Chananpat Retnani, Y Retno Budi Lestari Retno Sri Hartati Mulyandari, Retno Sri Hartati Rima Shidqiyya Hidayati Martin Rini Purnawati Risyahadi, S. T. Rita Mutia Rizki Amalia Nurfitriani Rochimawati, Nur Riana Rohmah, Aenyfatchu Rohmatussolihat Rohmatussolihat Romantica, Krishna Prafidya Roni Ridwan Roni Ridwan Roni Ridwan Rudi Priyanto Rusli Fidriyanto Rusli, N. D. S. P. Dewi S. P. Dewi S. Suharti S. Suharti Saad, M. Z. Sabila, Maureen Sadarman Sadarman , Sadarman Sadarman Sadarman, S. Saeful Ansor Samadi Samadi Samadi Samadi Samsudin, A. A. Samsudin, Anjas Asmara Santi Ratnakomala Selly Anastassia Amellia Kharis Sholeha, Novia Amalia Sholikin, M. M. Silitonga, Rhoito Frista Sitti Wajizah Sitti Wajizah Suci Wulandari Sugiyono Sugiyono Suharlina Suharlina Suharti, Sri Sukria, H. A. Sumiati SUMINAR SETIATI ACHMADI Suryanegara, Lisman Syamsiyah, Dzorifatus T Sutardi T. Ban-Tokuda T. M. Syahniar T. Obitsu T. Sabhan T. Toharmat Tandio, Tjondroargo Tangendjaja, Budi Teuku Mujaddid Syahri Ar-Ridha Thamrin, Elfa Susanti Theo Mahiseta Syahniar Titi Candra Sunarti Toto Haryanto Tri Aminingsih Tri Rachmanto Prihambodo Tri Wijayanti Septiarini Tuti Suryati Usman Ali Utomo, D. W. Manalu W. W. Wardani Wardani, W. W. Wasmen Manalu Widjaja, H. Widya Hermana Wijayanti, I. Win Ariga Bungsu Wina, E Wulansih Dwi Astuti Y Retnani Y. Marlida Y. Retnani Y. Retnani Y. Yogianto, Y. Yantina, N. Yantyati Widyastuti Yantyati Widyastuti Yanza, Yulianri Rizki Yeni Widyawati Yeni Widyawati Yesi Chwenta Sari Yuli Retnani Yuliansyah, Andika Boy Zain, M. Zulkarnain Zulkarnain Zulkifli, Sunarto