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Chairuddin Chairuddin

Universitas Sembilanbelas November Kolaka

Author-ID : 2492858

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Neuroscience Nursing Physics Public Health Social Sciences Veterinary Other

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PEMBUATAN KITOSAN PERAK SEBAGAI ADSORBEN UNTUK MENURUNKAN KADAR LOGAM BESI (Fe) DAN ZINK (Zn) PADA AIR SUNGAI DESA KOPAS KECAMATAN SIMPANG EMPAT KABUPATEN ASAHAN Agusnar, Harry; Chairuddin; Hannani, Nabilah
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 2 (2018): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Penelitian pembuatan kitosan yang dimodifikasi dengan larutan AgNO3 menjadi kitosan perak sebagai adsorben untuk menurunkan kadar logam besi (Fe) dan zink (Zn) pada air sungai desa Kopas kecamatan simpang empat kabupaten asahan telah dilakukan. Pada penelitian ini, didahului dengan pembuatan kitosan perak dengan melarutkan kitosan komersial dan asam asetat 1% serta dicampurkan dengan larutan AgNO3 0,5 M dengan rasio 2:1 lalu diteteskan kedalam larutan NaOH 2 M yang kemudian membentuk gel (bead) berwarna hitam. Kitosan perak yang telah dikeringkan dimasukkan ke dalam kolom, lalu ditambahkan dengan 50 mL sampel yang telah didestruksi dan sudah diketahui kadar logam Fe dan Zn sebesar 1,5175 mg/L dan 0,7218 mg/L. Didiamkan berdasarkan variasi waktu kontak selama 30, 45, dan 60 menit. Penentuan penurunan kadar logam yang telah di adsorbsi oleh kitosan perak dilakukan dengan menggunakan Spektrofotometri Serapan Atom (SSA). Hasil penelitian menunjukkan bahwa pada proses adsorpsi diperoleh persentase penyerapan logam Fe 82,154% dan logam Zn 84,871 % pada waktu kontak optimum penyerapan yaitu 45 menit.

EXPLORATION OF MATHEMATICAL CONCEPTS IN THE LOCAL WISDOM OF THE MEKONGGA PEOPLE Hidayati, Ully; Chairuddin, Chairuddin; Marillah, Dima
JME (Journal of Mathematics Education) Vol 10, No 2 (2025): JME (Jul - Dec)
Publisher : Universitas Sembilanbelas November Kolaka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31327/jme.v10i2.2520

This study explores the mathematical concepts embedded in the cultural practices and local wisdom of the Mekongga people in Kolaka and East Kolaka Regencies, Southeast Sulawesi, Indonesia. Guided by an ethnomathematical perspective, the research aims to identify and describe how mathematical reasoning manifests through traditional architecture, art, rituals, and social systems. A qualitative approach with an ethnographic design was employed, involving purposive interviews with cultural informants such as the Deputy King of Mekongga, traditional artists, and Tolea (customary leaders). Data were collected through observation, interviews, documentation, and literature review, then analyzed using the Miles and Huberman interactive model consisting of data reduction, display, and conclusion drawing. The findings reveal that Mekongga culture embodies diverse mathematical ideas: set theory in cultural classification and royal genealogies; geometry and proportion in traditional houses; transformational geometry in woven fabrics and decorative motifs; plane geometry and ratio in the kalo sara symbol; social arithmetic in mahar (dowry) traditions; and alternative numeral systems in historical records. These results confirm that mathematical thought is inherently present within local wisdom and daily life. Theoretically, this study strengthens D’Ambrosio’s framework of ethnomathematics by demonstrating how indigenous practices represent mathematical reasoning. Pedagogically, it highlights the potential of Mekongga cultural elements as contextual and meaningful learning resources, bridging abstract mathematical concepts with cultural understanding in mathematics education.

The Impact of Script Type Cooperative Learning Model Implementation on Mathematics Learning Outcomes in Class VIII Junior High School Students Chairuddin, Chairuddin
JME (Journal of Mathematics Education) Vol 6, No 1 (2021): JME
Publisher : Universitas Sembilanbelas November Kolaka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31327/jme.v6i1.1600

This is an experimental study to determine (1) the mathematics learning outcomes of class VIII students at SMP Negeri 16 Poleang Tengah after being taught using a script-type cooperative learning model on cube and block material; (2) the mathematics learning outcomes of class VIII students at SMP Negeri 16 Poleang Tengah after being taught using conventional learning models on cubes and blocks; and (3) the mathematics learning outcomes of students who are taught using a script-type cooperative learning model on cube and block material. The hypothesis of this study is that using the Script Type cooperative learning model to teach students mathematics is more effective than using traditional learning models on cube and block material in class VIII SMP Negeri 16 Poleang Tengah. The participants in this study were all students in class VIII, who were divided into three parallel classes with a total of 60 pupils. The Cluster Random Sampling approach was used to sample the two classes, one of which was designated as the control class and the other as the experimental class. A total of 40 people were included in the study from both classes. Data is retrieved through learning outcomes assessments, which are then utilized to collect information on students' math learning results. Descriptive and inferential statistics were employed in the data analysis technique. Inferential research using the t-test yielded a value of tcount = 2.293 in sig. = 0.027 = 0.05, indicating that H0 is rejected and H1 is accepted. This inferentially means that there is a significant difference in the mathematics learning outcomes of students in Class VIII SMP Negeri 16 Poleang Tengah who are taught the Script-type cooperative learning model versus the conventional learning model. Based on the findings of these research, it can be stated that using the script type cooperative learning model to teach students mathematics is more effective than using traditional learning models for class VIII students at SMP Negeri 16 Poleang Tengah.

Interest in Gamification Learning Based on Student Learning Styles Farman, Farman; Chairuddin, Chairuddin; Marniati, Marniati
JME (Journal of Mathematics Education) Vol 6, No 2 (2021): JME
Publisher : Universitas Sembilanbelas November Kolaka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31327/jme.v6i2.1586

This study aims to analyze student interest in gamification-assisted learning in terms of student learning styles. This research is a type of descriptive research using a qualitative approach. The subjects are students of the Mathematics Education Study Program, Faculty of Teacher Training and Education, USN Kolaka, a research course program with 20 students. The data collection technique used in this research is to use a questionnaire. The instrument used in this study was a questionnaire of learning styles and interest in learning in gamification-assisted learning. According to Miles and Huberman, the data analysis technique used in this study is a qualitative data analysis technique, namely data reduction, data presentation, and conclusion drawing. The results showed (1) the average student interest in gamification-assisted learning with word walls was in the high category, (2) student learning styles in research subjects mostly tended to be multimodal (60%), and (3) students with unimodal learning styles have high interest, bimodal, and trimodal learning styles have a very high interest in learning with gamification-assisted learning.

Mathematical Problem Solving Ability in Cooperative Learning Type Student Teams Achievement Division (STAD) Chairuddin, Chairuddin; Farman, Farman
JME (Journal of Mathematics Education) Vol 6, No 2 (2021): JME
Publisher : Universitas Sembilanbelas November Kolaka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31327/jme.v6i2.1669

This study aims to describe the mathematical problem solving ability of class IX students of SMP Negeri 1 Kolaka. The type of research used in this research is descriptive with a qualitative approach. The subjects of this study consisted of 25 students of class IXD SMP Negeri 1 Kolaka. The instruments in this study were a test of problem-solving skills and an observation sheet. The test questions for the ability to solve mathematical problems are in the form of a description test consisting of 5 questions. The observation sheet consists of teacher and student observation sheets which are arranged based on the application of STAD type cooperative learning. The data analysis technique in this study uses the Miles Huberman model which consists of data reduction, data presentation and conclusion drawing. The results showed that (1) the average mathematical problem solving ability of students taught by the STAD type cooperative learning model consisting of 25 students showed a mean value of 70, variance 82.82, and standard deviation 9.10. The average indicates that the problem-solving ability is in the good category. (2) The average percentage of teacher activity is 79.56% who are in the active category, while the average percentage of student activity is 76.67% who are in the active category. Thus, it can be concluded that STAD learning activities can facilitate the achievement of students' problem solving abilities

Penerapan Metode Design Thinking dalam Perancangan UI/UX pada Aplikasi Pintebs Kursus Online Bisnis dan Teknologi Syukur, Moh Rezky; Muhammad, Dian; Chairuddin, Chairuddin; Herwanto, Patah
VISA: Journal of Vision and Ideas Vol. 4 No. 3 (2024): VISA: Journal of Vision and Ideas
Publisher : IAI Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/visa.v4i3.4209

This article discusses the importance of designing user interface (UI) and user experience (UX) in mobile-based online course applications. In the introduction, the role of technology in learning, particularly online courses that enable remote learning interaction, is outlined. The literature review covers the concepts of UI, UX, and design thinking as a user-centered design methodology. The design thinking method is employed in the UI design of the online course application, encompassing the stages of empathy, problem definition, ideation, prototyping, and testing. The discussion results indicate that this approach is effective in generating UI/UX designs that align with user needs. Well-designed UI/UX facilitates user interaction and enhances their learning experience within the online course application. The conclusion of this article emphasizes the importance of user-centered UI/UX design in the development of online course applications to maximize the user's learning experience. The design thinking method has proven to be an effective approach in producing innovative designs that cater to user requirements.

DARI TRADISI KE TEKNOLOGI: PELATIHAN SISTEM INFORMASI GAMPONG (SIGAP) MENGUBAH DINAMIKA ADMINISTRATIF DI GAMPONG ACEH Kurniawan, Agus; Fairus, Fairus; Mastuti, Rini; Fuad, Muhammad; Purnama Sari, Riezky; Chairuddin, Chairuddin
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 7, No 3 (2024): MARTABE : JURNAL PENGABDIAN KEPADA MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v7i3.955-961

Penggunaan teknologi informasi dalam administrasi desa atau gampong memiliki potensi besar untuk meningkatkan efisiensi, transparansi, dan partisipasi masyarakat. Jurnal Pengabdian Masyarakat ini mendokumentasikan pelatihan penggunaan Aplikasi Sistem Informasi Gampong (SIGAP) di Provinsi Aceh dengan tujuan memperkenalkan dan meningkatkan keterampilan penggunaan teknologi informasi di tingkat lokal. Pelatihan ini melibatkan pemerintah gampong, petugas administrasi, dan mahasiswa sebagai peserta. Metodologi pelatihan mencakup sesi teori, demonstrasi, dan praktik langsung menggunakan SIGAP. Evaluasi dilakukan untuk mengukur efektivitas pelatihan dan dampaknya pada peningkatan kemampuan administratif di gampong. Hasil penelitian menunjukkan peningkatan signifikan dalam pemahaman dan penerapan SIGAP di antara peserta. Selain itu, aplikasi ini berhasil mempercepat proses administratif, meningkatkan akurasi data, dan memfasilitasi komunikasi antara pemerintah gampong dan masyarakat. Pelatihan SIGAP di Provinsi Aceh mendorong partisipasi aktif dalam pemanfaatan teknologi informasi di tingkat lokal, mendukung upaya pemberdayaan masyarakat, dan memberikan kontribusi positif terhadap pengembangan administrasi gampong yang modern dan efisien.

Study on Utilization of Active Natural Zeolite as Ammonia Absorbent in Aquarium as a Medium Fresh Fish Cultivation Chairuddin; Marbun, Roberta; Gulton, Jamahir
Journal of Chemical Natural Resources Vol. 4 No. 1 (2022): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

A study of the use of natural zeolite active as ammonia absorbent in an aquarium as the cultivation of medium fresh fish has been conducted. The water sample was taken from the surface water of Toba Lake, Pangururan, Samosir Regency. Natural zeolite was refined until measured at 200 mesh and activated by physics. Determination of ammonia was performed using spectrophotometrically with the Nessler method at the maximum wavelength of 410 nm. The result of the analysis of this study obtained that decrease in water pH and ammonia content in the water after feeding the fish was caused by the absorption of active natural zeolite active to the tenth day which concentration of ammonia on the first and tenth day was 1.2723 mg/L and 2.4171 mg/L with the largest absorption percent on the day to ten was 38.04%.

Synthesis of Cationic Surfactant N, N-(2-Laurate-Ethyl) Stearamidium Chloride Chairuddin
Journal of Chemical Natural Resources Vol. 3 No. 2 (2021): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

The cationic surfactant of N, N-(2-Lauric-Ethyl) Stearamidium Chloride had been successfully synthesized. It is long-chain alkyl surfactant derivative from ammonium salt with amide. Cationic surfactants that are synthesized from fatty acid derivatives are stearic acid and lauric acid. Stearic acid is used as stearamide-making material which is the product of methyl stearate amidation with diethanolamine use methoxide sodium catalyst. Lauric acid was used as esterification material with stearamide thus obtaining N, N-(2-Lauric-Ethyl) Stearamide of alcanolamide ester. Alcanolamide ester continued by salting reaction use HCl gas until obtained cationic surfactant of N, N-(2-Lauric-Ethyl) Stearimidium Chloride. Each compound analyzed function groups by FT-IR spectrophotometric with the analyzed change of melting points, and a part compound analyzed surface tension characteristic with measuring Critical Micelle Concentration (CMC) with use Du Nouy ring method. The analysis product obtained shows that methyl stearate by yield in the amount of 91.66% shows that melting point of 40.5Â°C, stearamide with yield in the amount of 87.6% show that melting point as 185Â°C by CMC value 0.133 mol/ L in 40.7 dyne/cm surface tension. Alcanolamide ester with a yield in the amount of 84.7% has a melting point of 55Â°C by a CMC value of 0.067 mol/L in 36.1 dyne/cm surface tension, and cationic surfactant has a melting point of 45Â°C by CMC value 0.055 mol/L in 31,1 dyne/cm surface tension. stearamide with a yield in the amount of 87.6% show that melting point of 185Â°C by a CMC value of 0.133 mol/L in 40.7 dyne/cm surface tension. Alcanolamide ester with a yield in the amount of 84.7% has a melting point of 55Â°C by a CMC value of 0.067 mol/L in 36.1 dyne/cm surface tension, and cationic surfactant has melting point as 45Â°C by CMC value 0.055 mol/L in 31,1 dyne/cm surface tension. stearamide with a yield in the amount of 87.6% show that melting point of 185Â°C by a CMC value of 0.133 mol/L in 40.7 dyne/cm surface tension. Alcanolamide ester with a yield in the amount of 84.7% has a melting point of 55Â°C by a CMC value of 0.067 mol/L in 36.1 dyne/cm surface tension, and cationic surfactant has a melting point of 45Â°C by CMC value 0.055 mol/L in 31,1 dyne/cm surface tension.

Determination of Copper and Zinc Content in Soil Based on Soil Position and Depth in Palm and Rambutan Garden Area Perangin Angin, Elsa Sucita; Chairuddin
Journal of Chemical Natural Resources Vol. 4 No. 2 (2022): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jcnar.v4i2.11969

The determination of copper and zinc in soil based on the position and depth at the application land of palm oil in the Rambutan garden. Part of control land, between rorak and plant, and rorak at a depth of 0-20 cm, 20-40 cm and 40-60 cm. Each 3 g soil sample was destructed with 10 mL of HNO3 concentrated at 180ÂºC for 20 minutes. Cu and Zn's content was determined using Atomic Absorption Spectroscopy (AAS) at wavelength 324.7 nm andÂ 213.9 nm, respectively. The analysis shows that Cu and Zn metal increase rorak at 84.0% and 57.7%, and soil between rorak and plant at 76.9% and 42.4%.

Co-Authors Ade Riska Sanjani Adryan Rachman Afzil Ramadian Agus Kurniawan Akbar Nasrum Akob, Bachtiar Al Tasa, Fiza Rauzika Amirul Mukminin ANDIKA SAPUTRA Andria Zulfa Arafah, Burhanuddin Arhita, Siska Arma Wangsa Asro Asro Aswin Aswin Ayu Asriani Baharudin Baharudin Bangun, Ahmad Darwin Bania, Allif Syahputra Basri, Teuku Hasan Cut Nuraini Dewi Andriani Dian Ulfa Sari Dwi Permatasari Efendi Barus, Efendi Encep Sopandi, Encep Erfina, Erfina Fairus, Fairus Faridy, Najihatul Farman, Farman Febrian , Fadri Febrian, Fadri Fitriyani Hali Fitriyani Hali Fitriyani Hali Fitriyani Hali, Fitriyani Gulton, Jamahir Guntur Arie Wibowo, Guntur Arie Halidin S.Pd., M.PMat Halidin, Halidin Hannani, Nabilah Harry Agusnar Hasrina, Noliza Herlina Herlina Herwanto, Patah Hidayati, Ully Husain, Dayana Sabila Husnaini, Nadia Indra Purnomo Irajuana Haidar Irma Dewi Isda Isra Djabbar Jahring Judijanto, Loso Jumino Suhadi, Jumino Karunia, Karunia La Ode Sirad Manugeren, M Marbun, Roberta Maria Ulfa Marillah, Dima Marniati Marniati Marniati Marniati, Marniati Martins, Agus Meiliati, Rafika Meilisa Alvita Muhammad Fuad Muhammad Reza Muhammad, Dian Nasarudin Nasarudin Nasruddin Nasruddin Nasruddin Nasruddin Nisa Miftachurohmah Nuraini Nuraini Nurliza Lubis Nuzwaty, Nuzwaty Ovan Ovan Padri, Abdul Robi Perangin Angin, Elsa Sucita PURBA, NORA MARIHOT Purnama Sari, Riezky Rachmawati Rachmawati Rahmah Fithriani Rahmi, Ummi Rahmiati Rahmiati Rahmiati Ramadhan, Nur Ihsan Rayhan Amadius Weihan Ridhonul Rahman Rinda Rini Mastuti Rusyda Auliya Saiful Anwar Matondang Salido, Achmad Samudra , Andika Sanjani, Ade Riska Sanjaya, Muhammad Arif Sari, Dian Ulfa Sari, Dian Ulfa Sari, Putri Mustika Sarimuddin, Sarimuddin Setiana, Diana sirad, La Ode Sitti Mutia Umasugi Siwi, Purwanto Sufri Mashuri Surlam, Ananda Eka Puspita Susanti, Gemi Syahputra Bania, Allif Syukur, Moh Rezky Tahir Tahir Tahir Tahir Tahir, Tahir Tasni, Nurfaida Tia, Elis Wilda Purnama Sari William Widjaja Zulida, Evi

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