Article Per Year (5 Year)
p-Index From 2020 - 2025
0.947
P-Index
This Author published in this journals
All Journal IJoICT (International Journal on Information and Communication Technology) Communication in Biomathematical Sciences Jurnal Matematika UNAND Madani : Indonesian Journal of Civil Society Jurnal AbdiMas Nusa Mandiri Jurnal Pengabdian Sosial
Hilda Fahlena
Unknown Affiliation
Religion Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Law, Crime, Criminology & Criminal Justice Mathematics Physics Public Health Social Sciences Other

Published : 10 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 10 Documents
Search

 1 
On the Reproduction Ratio of Dengue Incidence in Semarang, Indonesia 2015-2018 Puspita, Juni Wijayanti; Fakhruddin, Muhammad; Fahlena, Hilda; Rohim, Fatkhur; Sutimin, Sutimin
Communication in Biomathematical Sciences Vol 2, No 2 (2019)
Publisher : Indonesian Bio-Mathematical Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/cbms.2019.2.2.5

Abstract

Dengue is one of the mosquito-borne diseases caused by dengue viruses (DENV), which has become endemic in most tropical and subtropical countries, including Indonesia. Since there is a lot of dengue incidence on children of age less than fourteen years old in Semarang, Indonesia, it is the interest here to analyze the different rates of infection among different age groups. A SIR-UV mathematical model with age structure in human the population is constructed to describe dengue transmission in Semarang from 2015 to 2018. In this study, we separated the human population into four age classes: children (0-4 years), youngster (5-14 years), productive adults (15-60 years) and non-productive adults (over 60 years). We use Particle Swarm  Optimization to obtain optimal parameters for the transmission rates based on the yearly incidence. The basic reproduction ratio (R0) is derived from the Next Generation Matrix and is evaluated by using the optimal parameters for data Semarang in 2015-2018. Numerical simulation results show that the number of dengue incidence is in a good agreement with the actual data in Semarang for 2015-2018.
Mathematical Model of an Interaction between Bears and Salmon; A Case in British Columbia Fahlena, Hilda; Sahetapy-Engel, Jane T. M.; Ramadhanty, Azhary; Sutanto, Dancent; Wijaya, Eduardus Axel; Winarni, Ambar
Communication in Biomathematical Sciences Vol 2, No 1 (2019)
Publisher : Indonesian Bio-Mathematical Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (523.412 KB) | DOI: 10.5614/cbms.2019.2.1.4

Abstract

An interaction model for the Pacific salmon and bear population in British Columbia is discussed here. The phenomenon is shown during the salmons period of migration back to their birthplace river at the end of their life. During this returning home, a large number of bears from the nearby state come and prey on them. This predation of salmon before spawning is suspected as the cause of the decline in Salmon production. Here a dynamical model involving a specific predator-prey type interaction between Salmon and Bears is constructed in the form of a non-autonomous dynamical system, in which the transition rate from the adult state of salmon to the spawning state is positive only in the month of migration. Dynamical analysis for the stability of the coexistence equilibrium for the autonomous case is shown and sensitivity analysis for the non-autonomous the case is done numerically.
Mathematical Model of an Interaction between Bears and Salmon; A Case in British Columbia Hilda Fahlena; Jane T. M. Sahetapy-Engel; Azhary Ramadhanty; Dancent Sutanto; Eduardus Axel Wijaya; Ambar Winarni
Communication in Biomathematical Sciences Vol. 2 No. 1 (2019)
Publisher : Indonesian Bio-Mathematical Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/cbms.2019.2.1.4

Abstract

An interaction model for the Pacific salmon and bear population in British Columbia is discussed here. The phenomenon is shown during the salmons period of migration back to their birthplace river at the end of their life. During this returning home, a large number of bears from the nearby state come and prey on them. This predation of salmon before spawning is suspected as the cause of the decline in Salmon production. Here a dynamical model involving a specific predator-prey type interaction between Salmon and Bears is constructed in the form of a non-autonomous dynamical system, in which the transition rate from the adult state of salmon to the spawning state is positive only in the month of migration. Dynamical analysis for the stability of the coexistence equilibrium for the autonomous case is shown and sensitivity analysis for the non-autonomous the case is done numerically.
On the Reproduction Ratio of Dengue Incidence in Semarang, Indonesia 2015-2018 Juni Wijayanti Puspita; Muhammad Fakhruddin; Hilda Fahlena; Fatkhur Rohim; Sutimin Sutimin
Communication in Biomathematical Sciences Vol. 2 No. 2 (2019)
Publisher : Indonesian Bio-Mathematical Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/cbms.2019.2.2.5

Abstract

Dengue is one of the mosquito-borne diseases caused by dengue viruses (DENV), which has become endemic in most tropical and subtropical countries, including Indonesia. Since there is a lot of dengue incidence on children of age less than fourteen years old in Semarang, Indonesia, it is the interest here to analyze the different rates of infection among different age groups. A SIR-UV mathematical model with age structure in human the population is constructed to describe dengue transmission in Semarang from 2015 to 2018. In this study, we separated the human population into four age classes: children (0-4 years), youngster (5-14 years), productive adults (15-60 years) and non-productive adults (over 60 years). We use Particle Swarm  Optimization to obtain optimal parameters for the transmission rates based on the yearly incidence. The basic reproduction ratio (R0) is derived from the Next Generation Matrix and is evaluated by using the optimal parameters for data Semarang in 2015-2018. Numerical simulation results show that the number of dengue incidence is in a good agreement with the actual data in Semarang for 2015-2018.
Analysis of A Coendemic Model of COVID-19 and Dengue Disease Hilda Fahlena; Widya Oktaviana; Farida; Sudirman; Nuning Nuraini; Edy Soewono
Communication in Biomathematical Sciences Vol. 4 No. 2 (2021)
Publisher : Indonesian Bio-Mathematical Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/cbms.2021.4.2.5

Abstract

The coronavirus disease 2019 (COVID-19) pandemic continues to spread aggressively worldwide, infecting more than 170 million people with confirmed cases, including more than 3 million deaths. This pandemic is increasingly exacerbating the burden on tropical and subtropical regions of the world due to the pre-existing dengue fever, which has become endemic for a longer period in the same region. Co-circulation dengue and COVID-19 cases have been found and confirmed in several countries. In this paper, a deterministic model for the coendemic of COVID-19 and dengue is proposed. The basic reproduction ratio is obtained, which is related to the four equilibria, disease-free, endemic-COVID-19, endemic-dengue, and coendemic equilibria. Stability analysis is done for the first three equilibria. Furthermore, a condition for coexistence equilibrium is obtained, which gives a condition for bifurcation analysis. Numerical simulations were carried out to obtain a stable limit-cycle resulting from two Hopf bifurcation points with dengue transmission rate and COVID-19 transmission rate as the bifurcation parameter, representing a stable periodic coexistence of dengue and COVID-19 transmission. We identify the period of limit cycle decreases after reaching the maximum value.
FUNGSI EVANS, SIFAT-SIFAT DAN APLIKASINYA PADA PELACAKAN NILAI EIGEN DARI MASALAH STURM-LIOUVILLE Hilda Fahlena; Mahdhivan Syafwan; Admi Nazra
Jurnal Matematika UNAND Vol 4, No 1 (2015)
Publisher : Jurusan Matematika FMIPA Universitas Andalas Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jmu.4.1.23-30.2015

Abstract

Pada paper ini dikonstruksi dan didenisikan fungsi Evans pada masalahSturm-Liouville. Beberapa sifat-sifat fungsi Evans juga dibuktikan, yaitu: (i) nilai nolnyaberkaitan dengan nilai eigen, (ii) analitik untuk semua nilai eigen yang bernilai kompleks,dan (iii) mempunyai simple zeros pada kasus khusus dari masalah Sturm-Liouville. Sifatsifatfungsi Evans tersebut kemudian diterapkan untuk melacak nilai eigen dari masalahSturm-Liouville.
Revealing the Impact of the Combination of Parameters on SVM Performance in COVID-19 Classification Sri Suryani Prasetiyowati; Sri Harini; Juniardi Nur Fadila; Hilda Fahlena
International Journal on Information and Communication Technology (IJoICT) Vol. 10 No. 1 (2024): Vol. 10 No.1 June 2024
Publisher : School of Computing, Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21108/ijoict.v10i1.965

Abstract

Non-linear SVM functions to modify the kernel in the SVM. Each kernel function in linear and non-linear SVMs has several parameters that are used in the classification process. SVM is a method that has advantages in classification, but there are still obstacles in selecting optimal parameters. This research investigates the effect of parameter variations on SVM classification performance on the COVID-19 dataset, using linear, RBF, Sigmoid and polynomial kernels. The analysis shows that the polynomial kernel is superior with the highest performance compared to other kernels. The highest accuracy of 77.57% was achieved with a combination of C values ??of 0.75 and Gamma of 0.75, and an F1-Score value of 76.67% indicating an optimal balance between precision and recall. The performance stability produced by the polynomial kernel provides advantages in classifying the COVID-19 dataset, with more controlled fluctuations compared to other kernels. The interaction between the C and Gamma parameters shows that a Gamma value of 0.75 consistently provides good results, while adjusting the C parameter shows more controlled performance variations. This confirms that appropriate Gamma parameter settings are key in improving the accuracy and consistency of SVM model predictions in this case.
Meningkatkan Kualitas Pembelajaran dengan Pemanfaatan Artificial Intelligence pada Guru SMP Al Fajar Ciparay Fahlena, Hilda; Pratama, Marchelle Fernanda; Putri W., Amanda Kayla; Tarihoran, Ekmal Reyhan; Tsamarrah, Fadlil Taufani; Stephania, Celenie Patrisse
Jurnal Pengabdian Sosial Vol. 2 No. 3 (2025): Januari
Publisher : PT. Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/xmkj9068

Abstract

SMP Al Fajar merupakan salah satu sekolah swasta yang berada di desa Ciheulang Bandung, Kabupaten Bandung. Salah satu permasalahan yang dihadapi sekolah adalah belum maksimal dalam penggunaan kemajuan informatika pada pembelajaran. Salah satunya adalah belum mengenal artificial intelligence (AI) serta manfaat dalam pembelajaran. Tim pengabdian masyarakat menawarkan solusi untuk melakukan kegiatan pelatihan pengenalan dan penggunaan ChatGPT pada proses pembelajaran, khususnya mencari ide pembuatan soal, materi, dan andministrasi pembelajaran di SMP. Metode yang digunakan berupa pelatihan penggunaan ChatGPT dalam pembelajaran. Tahapan pada kegiatan ini dimulai dari tahapan persiapan berupa mencari mitra dan wawancara kebutuhan. Hasil survey menjadikan Guru SMP Al Fajar sebagai mitra dengan tawaran solusi penggunaan artificial intelligence pada pembelajaran. Selain itu, tahapan persiapan juga berupa persiapan pelaksanaan yang berupa koordinasi tempat pelaksanaan dan waktu pelaksanaan. Persiapan materi yang disajikan dalam bentuk modul sederhana mulai dari pengenalan AI, penggunaan dalam keseharian, cara menggunakan ChatGPT dalam mencari materi pelajaran dan administrasi pembelajaran. Tahapan selanjutnya adalah tahapan pelaksanaan berupa pelatihan yang diberikan sesuai persiapan materi sebelumnya dan dilanjutkan dengan praktek langsung yang dilakukan oleh guru SMP Al Fajar sebanyak 10 orang dengan mengajar mata Pelajaran yang berbeda-beda. Tahapan terkahir berupa evaluasi yaitu pengisian umpan balik oleh peserta pengabidan masyarakat. Hasil menunjukkan bahwa pelaksanaan pelatihan pembelajaran dengan AI ini sangat baik serta butuh kegiatan kontinu khususnya dalam pendampingan guru untuk penggunaan AI dalam pembelajaran.
IMPLEMENTASI APLIKASI WEBSITE SEKOLAH TAMAN KANAK-KANAK DEWI SARTIKA BANDUNG Lukman, Achmad; Fahlena, Hilda; Anuwiksa, I Wayan Palton
Jurnal AbdiMas Nusa Mandiri Vol. 7 No. 1 (2025): Periode April 2025
Publisher : LPPM Universitas Nusa Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33480/abdimas.v7i1.5946

Abstract

Community service activities held at Dewi Sartika Bandung Kindergarten School are based on several areas for improvement in publicizing the school's activities to the community. The school only had social media such as Instagram and Facebook during its establishment. Another shortcoming is the documentation of new student registration, which still uses registration forms, hard copies of family cards, and identity cards of prospective students' parents. The effectiveness of document storage could be improved. It is still prone to data loss, so it is necessary to have digital data storage to overcome these shortcomings by creating a website that is integrated with digital prospective student data collection. The method applied to measure success in this community service activity is quantitative method, namely giving a questionnaire which is then calculating to obtain a percentage value of success from this activity.  The results of community service activities carried out at the school are in the form of a website that can be accessed by teachers, parents of students, prospective school students, and public society and is expected to help with administrative work at the Dewi Sartika Bandung Kindergarten. The percentage of success of the website that has been created is in the “sufficient/normal” category, which is represented by a percentage value of 46.5 %.
Peningkatan Kreativitas dan Keterampilan Digital Pemuda Karang Taruna Kampung Karasak Wibowo, Agung Toto; Fahlena, Hilda; Maharani, Warih; Ramadhan, Nur Ghaniaviyanto
Madani : Indonesian Journal of Civil Society Vol. 7 No. 2 (2025): Madani : Agustus 2025
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/m026yk06

Abstract

Karasak Village, Ciheulang Village, Ciparay District, Bandung Regency, still faces challenges, including low digital literacy and limited use of information technology to support the development of the village's potential. This condition has implications for the limited ability of the younger generation to produce and distribute creative content that can strengthen local identity and increase village competitiveness in the digital realm. To address these challenges, the community service team implemented a training program targeting Youth Karang Taruna on December 15, 2024. The training materials were comprehensively designed, covering the use of social media, talent modules, storytelling, on-camera communication, video shooting techniques, and music and video editing. The method employed was a combination of theoretical instruction, direct practice, and interactive mentoring, enabling participants to produce digital content products independently. Evaluation of the activity was conducted through the distribution of questionnaires, with the results showing that 94% of participants agreed or strongly agreed with the usefulness of the training. These findings confirm that the activity was effective, well-received by participants, and has the potential to encourage increased digital literacy capacity and creativity of youth in creating content based on local potential, ready for publication on social media.
Co-Authors Achmad Lukman, Achmad Admi Nazra Agung Toto Wibowo Ambar Winarni Azhary Ramadhanty Dancent Sutanto Eduardus Axel Wijaya Edy Soewono Fakhruddin, Muhammad Farida Fatkhur Rohim I Wayan Palton Anuwiksa Jane T. M. Sahetapy-Engel Juni Wijayanti Puspita Juniardi Nur Fadila Muhammad Fakhruddin Nuning Nuraini Nur Ghaniaviyanto Ramadhan Pratama, Marchelle Fernanda Putri W., Amanda Kayla Ramadhanty, Azhary Rohim, Fatkhur Sahetapy-Engel, Jane T. M. Sri Harini Sri Suryani Prasetiyowati Stephania, Celenie Patrisse Sudirman Sutanto, Dancent sutimin sutimin Syafwan, Mahdhivan Tarihoran, Ekmal Reyhan Tsamarrah, Fadlil Taufani Warih Maharani Widya Oktaviana Wijaya, Eduardus Axel