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Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa
Published by Asosiasi Riset Ilmu Matematika dan Sains Indonesia
ISSN : 30326230     EISSN : 30465427     DOI : 10.62383
Core Subject : Science, Education,
Earth & Planetary Sciences Mathematics
Bidang kajian dalam jurnal ini termasuk sub rumpun Ilmu Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa. Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 174 Documents
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Penerapan Konsep Pembelajaran MIPA Topik Usaha dan Energi: Studi Pustaka Minerva Anindyta; Fajar Sodik; Nurzeini Herdiansyah; Muhamad Sofiandi; Rina Hidayati Pratiwi
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 4 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i4.678

Abstract

Work and energy are important topics in physics learning. Learning on this topic can be done using various methods and media, which provide different results depending on the approach used. This study aims to identify various learning models and media and their influence on learning about work and energy through a meta-analysis of 17 relevant research journals. The results of the study indicate that there are various learning methods that can be applied, including the 7E Learning Cycle, STEM, Problem Solving, Think-Pair-Share, Inquiry, and others. Of these various methods, the inquiry approach is the most widely used because it is relevant to the student-based curriculum that positions teachers as facilitators in developing students' thinking skills and intellectual discipline.
Isolasi dan Identifikasi Aktivitas Bakteri pada Air Batang Bungo Indri Artanti; Ardi Mustakim
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.724

Abstract

Batang Bungo River faces severe pollution from domestic waste and illegal gold mining, which has led to an increase in skin diseases and diarrhea among residents of Tanjung Gedang, exacerbated by poor physical-chemical water quality, including low pH and high levels of Total Suspended Solids (TSS) and Chemical Oxygen Demand (COD), all of which foster the growth of pathogenic microorganisme. This study aimed to identify bacteria and fungi present in Batang Bungo River water, characterizing their colony morphology and microscopic structures to understand the impact of pollution on microbial communities. The methodology involved serial dilution of water samples, followed by inoculation onto Nutrient Agar (NA) media using the pour plate technique, and incubation at 37°C for 24-48 hours. Macroscopic observations of colonies (color, shape, texture) were performed, and representative colonies were stained with crystal violet for microscopic observation at 1000x magnification to identify cellular and hyphal structures. The results indicated the presence of various microorganisms, including Gram-positive bacteria, filamentous fungi, and possibly protozoa, with colonies exhibiting characteristics such as off-white color, rough surfaces, and irregular edges. Microscopic examination after crystal violet staining revealed rod-shaped (bacilli), spherical (cocci) structures, and branched filamentous structures resembling hyphae, consistent with a mixture of bacteria and filamentous fungi. The identification of pathogens like Clostridium, Dermatophilus, and Escherichia coli in previous studies, coupled with the poor water quality, confirms significant microbiological and chemical contamination. Crystal violet proved effective as a stain for microscopic identification of microorganism structures. In conclusion, the water quality of Batang Bungo River is highly concerning and requires serious attention for monitoring and management to safeguard public health and the river ecosystem.
Identifikasi dan Karakterisasi Mikroba pada Tape Singkong (Manihot esculenta) Setelah Pengisolasian melalui Teknik Pengecatan Annisa Tuzzahra; Ardi Mustakim
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.725

Abstract

Cassava tape is a traditional fermented product widely consumed in Indonesia, especially in rural areas. It is produced from cassava (Manihot esculenta) through the activity of microorganisms during the fermentation process. The presence of microbes in this process plays a crucial role in the flavor, aroma, texture, and final quality of the product. The microorganisms involved, including bacteria, molds, and yeasts, work synergistically to break down the carbohydrate components of cassava into simpler products, resulting in the sweet taste and distinctive aroma of tape. This study aimed to identify and characterize the microbes present in cassava tape through isolation and microscopic staining using safranin. The isolation process involved several stages: sequential sample dilution, inoculation onto Nutrient Agar (NA) media using the pour method, and incubation at 37°C for 24 hours. The growing microbial colonies were observed macroscopically, then collected and subjected to simple safranin staining to determine the shape and distribution pattern of the microbial cells microscopically. Observations revealed colonies with diverse morphologies, including rod-shaped (bacilli) and spherical (cocci), evenly distributed across the observation area. This indicates that cassava tape contains microorganisms of various morphologies that play a role in the fermentation process. Simple safranin staining has been shown to provide an initial overview of the presence and form of microbes, although further identification to the genus or species level requires further tests such as Gram staining, biochemical tests, and molecular analysis. These findings open up opportunities for further in-depth research into consumption safety, the functional role of microbes in tape fermentation, and its potential use as a source of natural probiotics in traditional fermented foods.  
Proposisi dalam Matematika: Pemahaman Tentang Negasi Konjungsi, dan Disjungsi dan Penerapan Operasi Logika dalam Analisis Matematika Prihaten Maskhuliah; Tita Mustikawati Selayar; Aulia Salsabila Putri
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.744

Abstract

This article examines the concept of propositions in mathematics, which are statements referred to as (closed sentences, false, values, and true values). The discussion covers negation, or what is known as negation, as operations that have truth values and truth tables. In addition, this article examines conjunction, or compound propositions that are true. (the combination of two questions), which involves two propositions with either true or false values. Furthermore, this article also examines disjunction, which involves statements containing conjunctionand also has truth tables. The primary objective is to provide a concise yet comprehensive understanding of propositions as logical and mathematical concepts. In addition, this article examines conjunction, or compound propositions that are true. A conjunction involves two propositions that are combined using the logical operator "and," symbolized by ∧. The conjunction of two propositions is true only when both individual propositions are true. For example, if P is true and Q is true, then the conjunction P ∧ Q is also true. However, if either P or Q is false, the conjunction P ∧ Q becomes false. The truth table for conjunction helps to clarify these conditions. Conjunction is often used in mathematical proofs, where multiple conditions must be satisfied simultaneously for a statement to hold true. Furthermore, this article also examines disjunction, which involves statements containing conjunction and also has truth tables. Disjunction, represented by the symbol ∨, involves two propositions and is true if at least one of the propositions is true. If both propositions are false, the disjunction is false. For instance, if P is false and Q is true, then P ∨ Q is true. The truth table for disjunction provides clarity on how this operation works. Disjunction is frequently used in mathematics and logic to express situations where at least one condition must be satisfied.
Optimisasi Keuntungan Produksi Kue pada Cake By Cece Menggunakan Algoritma Branch and Bound Kosasih, Eva; Rusniati, Ni Wayan; Tari Tastrawati, Ni Ketut
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.748

Abstract

This study aims to optimize the cake production profit at Cake by Cece using the Branch and Bound algorithm. The data used include raw material requirements per batch, daily raw material availability, and selling prices for three types of cakes: Cookies, Brownies, and Cinnamon Roll. The optimization model is formulated as an Integer Linear Programming problem with the objective of maximizing total daily profit. The model is solved using the simplex method followed by the Branch and Bound algorithm to obtain valid integer solutions. The results indicate that the optimal production combination is 2 batches of Cookies, 2 batches of Brownies, and 3 batches of Cinnamon Roll, yielding a maximum profit of IDR 233,000 per day. This solution satisfies all raw material constraints and is feasible for daily operational implementation. This study provides quantitative recommendations to support production decision-making in culinary sector MSMEs.
Pendekatan Inovatif dalam Pembelajaran IPA : Sebuah Systematic Review 2020-2025 Amanda Gosynda Putri; Ernita Vika Aulia; Muhamad Arif Mahdiannur
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.791

Abstract

Natural Science (IPA) learning is an important foundation in developing students' scientific literacy, critical thinking skills, and scientific attitudes. However, the learning process still faces many challenges related to low learning interest, the dominance of conventional methods, and limited use of technology. This article aims to analyze the effectiveness of innovative approaches in science learning through a systematic review of 25 national and international journal articles published in 2020–2025. The systematic review method was carried out through the stages of identification, selection, data extraction, and thematic analysis. The results of the analysis show that the Problem-Based Learning (PBL), Inquiry-Based Learning (IBL), STEM Learning, and digital technology integration (PhET Simulation, mobile learning, gamification, blended learning) approaches have been proven to have a positive impact on learning outcomes, critical thinking skills, creativity, and student motivation. The thematic analysis resulted in four main themes: (1) strengthening critical thinking skills through PBL, (2) developing creativity and scientific literacy through IBL, (3) STEM integration to improve collaboration and scientific attitudes, and (4) utilizing digital technology for motivation and understanding abstract concepts. This study concludes that a combination of various innovative approaches is needed to make science learning more relevant to the demands of the 21st century.
Peninjauan Literatur Sistematis : Pemakaian Media Pembelajaran Digital dalam Mata Pembelajaran IPA di Tingkat Sekolah Dasar Yusrina Maulidya Zahira; Ernita Vika Aulia; Muhammad Arif Mahdiannur
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.792

Abstract

The use of digital-based learning media has revolutionized the way we learn and teach. Particularly in teaching science at the elementary school level, the application of this type of media stands out as a relevant and interesting topic. This media can significantly improve the quality of science learning, while providing a more interactive and enjoyable learning experience for students. This study aims to review the literature related to the use of digital learning media in the context of science teaching. The approach used is a Systematic Literature Review (SLR). The data collection process involved compiling and analyzing articles discussing digital learning media in science learning, focusing on publications from 2021 to 2023. A total of six articles from journals available on Google Scholar were collected by the researcher. From a systematic review of various published studies, it can be summarized that various types of digital media can be applied in the science learning process. The most commonly used media include digital elements such as images, videos, simulations, and interactive games, as these tools can motivate students to learn and strengthen their curiosity about the material being studied.
Correct Programming and Robust Queueing Theory in an Integrated Model for Quality-Of-Service Enhancement in Service Systems Hasanain Hamed Ahmed
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.712

Abstract

This article presents a review study that proposes a blended model combining actual programming techniques with queuing theory to improve the performance and service quality of service systems. The main objective is to design a system that is capable of serving customers as efficiently as possible, using solutions derived from queuing theory to regulate and optimize customer flow, while applying accurate programming methods to ensure that the system operates correctly and in accordance with established standards. The study discusses how these two approaches complement each other and demonstrates that integrating them provides a balance between operational efficiency and the quality of services delivered. To illustrate the effectiveness of this hybrid model, a case study is examined to highlight the practical impact and real-world implications of the proposed framework. Both mathematical formulations and experimental analyses were employed to evaluate the model’s effectiveness. Findings indicate that this combined approach not only enhances system reliability but also provides measurable improvements in customer satisfaction and service outcomes. By offering a structured way to integrate queuing solutions with precise programming, this research contributes to the development of more sustainable and effective service management strategies. The model therefore has significant potential for broader application in industries that rely heavily on service delivery and customer flow optimization.
Isolasi dan Pertumbuhan Mikroba dari Tanah menggunakan Media Berbasis Ekstrak Singkong Dian Novita; Ardi Mustakim
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.758

Abstract

This study aims to explore the potential of cassava extract (Manihot esculenta)-based growth media for isolating microorganisms from soil. The use of alternative culture media is crucial, especially in regions with limited access to commercial media such as Nutrient Agar or Potato Dextrose Agar, which are relatively expensive. Cassava, a tropical tuber rich in starch and widely available in Indonesia, offers significant promise as a natural substrate for microbial growth. Microbial isolation was performed using a serial dilution method on soil samples collected from an organic garden. The media was prepared from cassava juice mixed with agar and glucose, sterilized, and poured into petri dishes. After inoculation, microbes were incubated for seven days at room temperature. Colony morphology was observed macroscopically, and Gram staining was used to identify bacterial characteristics. The results revealed that cassava extract media effectively supported the growth of diverse microbial colonies, varying in shape, color, and edge structure. Most isolates were identified as Gram-positive, with rod and coccus forms. The presence of pigmented colonies indicates the potential of certain isolates to produce bioactive compounds. In conclusion, cassava extract-based media is a viable alternative for soil microbiology studies. It is not only cost-effective but also facilitates the exploration of local microbial diversity with potential applications in biotechnology, including bioremediation and enzyme production. This approach encourages the use of indigenous resources in scientific research, promoting sustainability and accessibility in microbiological practices.
Analisis Morfologi Koloni dan Pewarnaan Gram Jamur Isolat Singkong (Manihot Esculenta) Novita Maharani; Ardi Mustakim
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.759

Abstract

Cassava (Manihot esculenta) is a staple food that is widely consumed by the Indonesian population, especially in rural areas. However, during post-harvest handling and storage, cassava is highly susceptible to contamination by microorganisms, particularly fungi. These fungi can cause damage to the food, reduce its nutritional quality, and even produce mycotoxins that are harmful to human health. The increased risk of contamination has become an important concern in efforts to improve the quality and safety of cassava food products. This study aimed to identify the morphology of fungal colonies and the characteristics of fungal cell walls isolated from cassava stored in open environmental conditions for several days. The methods used in this study included isolation using Potato Dextrose Agar (PDA) media, macroscopic observation of fungal colony morphology, including color, edge, elevation, and texture, as well as Gram staining to observe the fungal cell wall properties. The results of this study revealed a diversity of fungal colony morphology, with three dominant types suspected to belong to the genera Aspergillus, Penicillium, and Rhizopus. Gram staining showed that the three isolates were characterized as Gram-negative, indicated by the absorption of safranin as the secondary stain. This study provides an initial overview of the types of fungi that may develop on cassava during storage, and it offers a foundation for further studies on the toxicity and food microbiology applications related to cassava. Morphological identification and Gram staining play an essential role in the initial screening before molecular identification is performed.

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