Kalimantan Island Research Articles

Effectiveness of ethnomathematics-based learning on students’ mathematical literacy: a meta-analysis study

This study aims to determine the effectiveness of ethnomathematics-based learning on students’ mathematical literacy through a meta-analysis study. Primary studies were collected from Google Scholar and ERIC databases based on the inclusion criteria. The results of the literature review obtained 16 studies, either from theses, proceedings, or journal articles. Furthermore, the effect sizes were combined according to the Random Effects Model (REM) and data analysis using CMA v3 and R Studio (Meta Package). The calculation results obtained an overall effect size which indicates that ethnomathematics-based learning has a “strong” effect on students’ mathematical literacy when compared to conventional learning. As a result of the moderator category analysis, it was found that the effect sizes differed significantly according to students’ regional demographics, independent variables, and subject matter. However, it does not show significant differences when based on the duration of the meeting, education level, sample size, experimental design, type and year of publication. Thus, it can be said that ethnomathematics-based learning can be an effective learning model for increasing students’ understanding of mathematical literacy, especially in the Kalimantan Island region, recommended to be integrated with the Ethnomathematics Pop Up Book and Visual Thinking learning model, and Probability & Sets and Transformation Geometry materials, using Nonequivalent Control Group Design are recommended to be taught through this learning model.

The Effect of Service Quality And Agency Skills on The Effectiveness of Sailing Time at Bulk Cargo Carrier

The length of the ship clearance process at an agency company makes a reference for each company in improving the quality of services provided and the skills of its employees. This study aims to determine the effect of service quality and skills on the effectiveness of sailing time for bulk cargo ships loaded with coal at three different agency companies on the island of Kalimantan. The method used is a quantitative approach through primary data processing on IBM SPSS (Statistical Package for the Social Science) 25 which comes from 30 respondents. The results of the research proven through the t test show that service quality and skills partially have a positive and significant influence on effectiveness. Simultaneous testing with an Fcount value of 33.755> 4.20 and a sig value of 0.000 <0.05 proves that service quality and skills together have a significant influence on effectiveness. This is supported by the coefficient of determination test which states that the service quality and skills variables have an influence of 71.4%, on the effectiveness variable, while 28.6% of effectiveness is influenced by variables outside of service quality and skills not examined by the author. The conclusion in this study is that the service quality and skills variables have a positive influence on the effectiveness variable partially and simultaneously.

Should developed regions bear more responsibility in addressing environmental issues? Insights from Indonesia's unequal regional development

Addressing environmental issues is inherently complex due to the fundamental question of who should bear the responsibility. While it is more prominent at the global level, this issue is also pertinent at a subnational level, such as in Indonesia, where significant disparities exist in economic development and environmental degradation across the archipelago. Our research intends to fill the gap by measuring environmental footprints in the country by accounting for the interregional trade between provinces. We integrate an Interregional Input-Output (IRIO) model developed by Indonesia's Central Bureau of Statistics with the national sectoral energy input dataset, the blue water consumption vector from EXIOBASE, and the national land use map, creating an Environmentally-Extended Interregional Input-Output (EE IRIO). The study revealed that Indonesia's carbon and water footprints are primarily consumed and produced on Java Island; meanwhile, the agricultural footprint is produced on Sumatra and Kalimantan Island but consumed significantly on Java Island. This result corresponds with Java Island's domination in terms of the economy and population. The study revealed that developed regions produce footprints directly and induce footprint generation in other areas through import demand, emphasizing the relevance of ‘common but differentiated responsibility’ in local development.

Comparison of Climatology of Precipitation Diurnal Cycle in Kalimantan Deduced from Rain Gauge and IMERG Data

Abstract The diurnal cycle is repetitive pattern of changes in weather factors on land and oceans due to the Earth rotation. Kalimantan Island as the largest island in the Maritime Islands region has a complex rainfall pattern that is influenced by local factors and global circulation. The research was conducted to find out the climatological comparison of the diurnal cycle of rain in Kalimantan based on rain gauge data and Integrated Multi-SatellitE Retrievals for GPM Version 07 (IMERG V07) data for the period 2016 - 2022. Data validation using rain gauge data to validate and calibrate IMERG satellite data, improving the accuracy and reliability of satellite rainfall estimates. The diurnal cycle is evaluated through a Precipitation Amount (PA), Precipitation Frequency (PF), and Precipitation Intensity (PI) every hour. The results show that the maximum rainfall occurs in the afternoon and evening along the coast, and in the middle of the night and morning on the Kalimantan plains. Kalimantan has high rainfall intensity values at short rainfall durations, i.e. rain lasting less than 3 hours. This is expected to improve the quality of hydrometeorological disaster mitigation in Kalimantan.

Passive Cooling Design Opportunities: Lessons Learned from Traditional Banjar Houses

Abstract Indonesia is an archipelago country that encompasses many different ethnicities across five large islands, one of which is Kalimantan (Borneo) Island. The river has become the lifeline in Borneo, especially for Banjar people. Banjar people have eleven types of traditional houses, each designed for specific social classes, which differ from one another in terms of materials, layout, and roof proportions. In this paper, three different types of Banjar traditional houses are compared to study the passive cooling conditions related to the proportions of the floor plan and cross-section. These three types are: (1) Bubungan Tinggi House, (2) Palimbangan House, and (3) Lanting House. The three types of houses are modelled and simulated using RWIND CFD software, by inputting the maximum and minimum wind speed (3.5 and 17 m/s), to study the potential of imitating vernacular forms that assures effective passive cooling. The result is that the Palimbangan house has the most balanced passive cooling performance through wind movements and direction. The findings could serve as an alternative for application in modern housing architecture that is sustainable and energy-efficient.

Development of a Prediction Model for Potential Forest and Land Fires using Machine Learning Algorithms Based on Patrol Data

Indonesia allocates 120 million hectares or 64% of its land area as forest areas. Indonesia's forests continue to experience deforestation; one of the causes is forest and land fires (karhutla). The government conducts forest and land fire prevention through integrated patrols with the Forest and Land Fire Prevention Patrol Information System (SIPP Karhutla) facility for patrol data management. However, the patrol data are still primarily used for data observation and simple spatial analysis in the spatial module. Patrol data has not been used for further forest and land fire prevention studies. Based on these problems, this research aims to build a prediction model of potential forest and land fires using SVM, Random Forest, and XGBoost algorithms and compare model performance to get the best model. The preprocessing stage uses the SMOTE-ENN method to handle data class imbalance, and the k-fold cross-validation stage and hyperparameter tuning use the random search method. The confusion matrix evaluation method to see the model performance in terms of accuracy is XGBoost (94.81%), Random Forest (90.23%), SVM-linear (79.58%), SVM-polynomial model (73.99%), SVM-rbf (74.26%), and SVM-sigmoid (35.04%). Therefore, the best prediction model is XGBoost (94.81%) with boosting technique. The results of this study have implications for helping early prevention of forest and land fires on the islands of Sumatra and Kalimantan.

Influence of autumn soil moisture over Kalimantan Island on following winter precipitation over southern China

AbstractThe atmospheric activity on Kalimantan Island (KI) is important for regulating regional weather and climate. This study investigates the effect of autumn soil moisture over KI on following winter precipitation over southern China (SC) during 1968–2014. The results show that the autumn soil moisture over the KI has a significant negative correlation with subsequent winter precipitation over SC. The correlation remains statistically significant when using partial correlation to filter out the concurrent influences of El Niño–Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) signals. The soil moisture anomalies over KI, which initiate in the autumn and persist into the winter, lead to changes in local thermal conditions and atmospheric temperature. Negative soil moisture anomalies over KI will result in positive heating anomalies of the atmosphere above the land surface. This atmospheric heating causes ascending motion, which creates a semi‐closed vertical circulation from KI to the tropical northwest Pacific. This vertical circulation would strengthen the northwest Pacific anticyclone and weaken the East Asian winter monsoon (EAWM). Consequently, southwesterly water vapour flux prevails in the SC as well as the South China Sea (SCS), facilitating the transportation of more water vapour into the SC. Simultaneously, water vapour convergence in the SC. Collectively, these contribute to an addition of precipitation over SC.

Variability and pharmacological potential of bajakah (Spatholobus sp.) as an indigenous medicinal plant: a review

Bajakah (Spatholobus sp.) is an indigenous Indonesian plant that has been traditionally used as medicine, especially in Kalimantan Island, Indonesia. The variability and potential of bajakah as a traditional Indonesian medicinal plant have attracted research attention. This review article describes the traditional use, distribution, and pharmacological activity of bajakah. An integrative review method was employed, following procedures such as literature search, data analysis, and result presentation. Understanding the variations is important to understand the therapeutic potential and differences in active compound content among different types of bajakah. Furthermore, the chemical composition of bajakah has been identified, including alkaloids, flavonoids, tannins, saponins, and triterpenoids, which can potentially exhibit pharmacological effects and mechanisms of action associated with its traditional use. This review provided additional insights into the potential of bajakah as an herbal medicinal in the future. Therefore, this review article provides an overview of the traditional use distribution, and pharmacological activity of bajakah as a promising traditional medicine. Further research, including clinical studies, is needed to scientifically validate the therapeutic potential of bajakah and further understand the mechanisms of action and potential side effects associated with it.

Mapping the habitat distribution of horseshoe crabs (Tachypleus gigas) in Pamekasan, Madura Island, Indonesia

Abstract Horseshoe crabs, often known as Belangkas or Mimi, is one of the ancient marine faunas with protected conservation status. Horseshoe crabs are distributed in coastal waters of Indonesia of the islands of Sumatra, Java, Kalimantan, and Sulawesi, which are often caught as bycatch. Horseshoe crabs’s bloods were uniquewhich contain amebocytes as a test material for the presence of endotoxin bacteria. The purpose of this study was to identify the species of horseshoe crabs and to analyze environmental conditions, as well as the distribution of horseshoe crabs in the coastal waters of Pamekasan, Madura Island. This study was conducted in June 2023 by collecting data from crab fishers. ArcGIS was applied to delineate the distribution of horseshoe crab. The identification results showed that there was one species horseshoe crab of the Tachypleus gigas in the waters of Polagan Village, Galis District, Pamekasan Regency. The environmental condition of the waters in Polagan Village, Galis District, and Pamekasan Regency was relatively good. Habitat mapping is one way to protect these animals from the threat of extinction and support conservation efforts.

Antioxidant Activity, Total Phenolics, and Total Flavonoids Content of Bajakah Tampala (Spatholobus littoralis): The Indigenous Herbal Medicine from Kalimantan

Bajakah tampala (Spatholobus littoralis), a medicinal plant traditionally used in Indonesia, particularly on Kalimantan Island, has garnered interest for its potential health benefits. However, scientific evidence remains scarce. This study investigated the antioxidant activity of S. littoralis extract and its total phenolic and flavonoid content. Ethanol extraction and evaporation were used to prepare the extract. The DPPH method assessed antioxidant activity, while Folin–Ciocalteu and AlCl3 complexation methods quantified total phenolics and flavonoids, respectively. The S. littoralis extract exhibited strong antioxidant activity with an IC50 value of 54.19 ± 8.15 µg/mL. Additionally, the extract contained substantial levels of phenolics (0.649 ± 0.026% GAE) and flavonoids (1.084 ± 0.043% QE). These findings suggest a link between the high phenolic and flavonoid content of S. littoralis extract and its observed strong antioxidant activity.

Mapping Asia Plants: Plant Diversity and a Checklist of Vascular Plants in Indonesia.

Indonesia, located in Southeast Asia, is the world's largest tropical island country. It is globally recognized as a unique center of biodiversity in the Asian-Australian transitional zone. To date, however, no national plant checklist of Indonesia has been published. Here, we collected botanical information on the flora of Indonesia and presented for the first time a checklist of known native species of vascular plants in the country. Our checklist included 30,466 species belonging to 2968 genera and 317 families, representing 8.7% of the 351,180 vascular plant species worldwide. Among the seven regions, Sumatra had the highest number of species at 10,902, followed by Indonesian New Guinea (9935), Java (9289), Kalimantan (9191), Sulawesi (7048), Maluku (5294), and Lesser Sunda Islands (4514). In contrast, Indonesian New Guinea had a much higher proportion of locally endemic species than other regions (59%). The seven regions were divided into three phytogeographical areas: the Sunda Shelf, the Sahul Shelf, and the Wallacea, based on similarities in floristic composition. Our checklist for Indonesia provides basic information for biodiversity conservation and associated research.

PEMODELAN GEOGRAPHICALLY WEIGHTED REGRESSION (GWR) MENGGUNAKAN PEMBOBOT KERNEL PADA KASUS TINGKAT PENGANGGURAN TERBUKA DI KALIMANTAN

AbstractUnemployment is one of the serious problems in Indonesia's economic development. This unemployment describes human resources that have not been utilized optimally, as a result of which people's productivity and income have not been maximized, this can also be one of the causes of poverty and other social problems. This study aims to find out the general picture of the open unemployment rate in the Kalimantan region, get the best model and factors that influence the open unemployment rate and illustrate it through thematic maps. The study began with testing assumptions and spatial effects then continued with testing global regression modeling and Geographically Weighted Regression. The weighting function used in this study is adaptive gaussian kernel. The variable that has a positive effect on the open unemployment rate in the Kalimantan region is population density. While the variable that negatively affects the open unemployment rate is the Labor Force Participation Rate. Keywords: Open Unemployment Rate, Kalimantan Island, Spatial, GWR

Infrastruktur Konektivitas, Peran Pemerintah, dan Perkembangan Sosial Ekonomi Regional: Bukti dari Kalimantan

The Island of Kalimantan, designated by the Indonesian government as the site for the new capital city, necessitates significant infrastructure improvements to support its economic development. This research evaluates the progress of the connectivity infrastructure in Kalimantan, reviews the role of the government in facilitating this development, and estimates the relationship between infrastructure and the community’s social and economic activities. The study applies descriptive statistics, correlation analysis, comparative studies, and interregional input-output methodology by utilizing various data sources including the central government budget, regional government budget, village potential data, Susenas, and Geographic Information System GIS) data. Our findings reveal increasing budgets from both central and local governments, yet limited improvements in road infrastructure. An increase in the availability of road infrastructure per km² is positively correlated with enhanced trading activities, the provision of shops, improved public transportation, and better access to education and health facilities. In addition, the establishment of airports and ports is linked to higher per capita income and increased service and manufacturing activities, as well as the growth of food stalls, shops, and banking services.

THE PERFORMANCE OF TJILIK RIWUT AIRPORT TAXIS IN THE CITY OF PALANGKA RAYA CITY ACCORDING TO USER

The existence of the Tjilik Riwut airport plays a big role in the development of the Palangka Raya area and its surroundings, especially in providing convenience for domestic passengers who want to visit Palangka Raya City, especially students or tourists who come from outside the island of Kalimantan. The Tjilik Riwut airport taxi is the only airport taxi owned by the Tjilik Riwut airport taxi in the city of Palangka Raya. and it is necessary to know how the performance of the Tjilik Riwut airport taxi in Palangka Raya City according to airport taxi passengers as a consideration for users in determining the mode of transportation. Sampling was carried out by distributing questionnaires with a total of 94 respondents and then analyzed using the Customer Satisfaction Index (CSI) method to determine the level of customer satisfaction with the performance of airport taxis. The results of the CSI analysis on the performance assessment of Tjilik Riwut airport taxis in the city of Palangka Raya show the numbers 54.99 which are included in the category Quite Satisfied

A critical review of peatland ecosystem services research in Indonesia: Uncovering knowledge gaps and research needs

Peatlands provide a broad range of ecosystem services (ES) that are critical to ecosystem regulating and human well-being. However, anthropogenic activities threaten their existence, leading to degradation, destruction, and loss of these ecosystems. To effectively convey the value of peatlands, it is important to share knowledge on the ES they provide. This review aims to provide an overview of the ES provided by peatlands in Indonesia. We undertook a critical review of articles published on Scopus, ScienceDirect, and Google Scholar to investigate various aspects of peatland ES. Our examination encompassed data types, valuation methods, modes of assessment, ecosystem services categories, study site scale, temporal patterns, purposes of publication, and study limitations related to peatland ES. From a set of 1,115 potentially relevant papers, 45 were selected for analysis. Our findings showed that ES studies are heavily concentrated on the Kalimantan and Sumatra islands, with most studies focused on specific provinces such as Central Kalimantan and Riau. The most commonly used data type, method, and mode of assessment were secondary data, look-up tables, and economic valuation, respectively. Provisioning services were the most frequently studied ES category, followed by regulating services, supporting services, and cultural services. However, gaps persist, including limited data, understanding, and long-term sustainability consideration. Future research should address these gaps by focusing on underrepresented peatland ecosystems, integrating diverse approaches, and considering global peatland issues.

Analysis of the Effect of Poverty and Economic Growth on the Human Development Index (HDI) in Kalimantan Island

The Human Development Index (HDI) is a tool to assess the effectiveness of a development aimed at improving living standards and can be used as a measure of the status or level of progress of a particular region or country. According to data from the Central Bureau of Statistics (BPS), the poverty rate in Kalimantan Island has decreased between 2013 and 2023, although its economic growth tends to be unstable. However, the HDI in Kalimantan Island continues to experience a significant increase. This research applies quantitative methods with panel data regression analysis. This study was conducted to determine the effect of poverty and economic growth on HDI in Kalimantan Island. The findings of this study show that in Kalimantan Island, HDI is significantly affected by poverty, but not by economic growth. However, when analyzed together, poverty and economic growth have a significant influence on HDI in Kalimantan Island. Following up on the findings of this study, it is important to optimize the Human Development Index to increase the effectiveness of maximum development in Kalimantan Island.

EVALUASI KINERJA PELABUHAN PANTOLOAN KOTA PALU

The city of Palu is located in a very strategic area which making it a gateway to connect Central Sulawesi with Kalimantan Island. Pantoloan port developed as a support for the movement but even with the strategic location and enormous potential, this port tends to be quiet with activities that should be present at ports in general. This research aims to determine the level of satisfaction of port users and to analyze the factors that influence its performance. This research using a descriptive method with qualitative approach through distributing questionnaires to respondents which later be analyzed using the Customer Satisfaction Index and Importance Performance Analysis methods. The results of the evaluation study on the performance of Pantoloan Port are that port users are quite satisfied with a percentage reaching 52%. Other factors that greatly influence the level of satisfaction and are priorities in developing port performance are timeliness, accessibility and affordable rates.

Sounds of Lengilo based on the Swadesh List

The Lengilo is a small indigenous group who live in northern Sarawak and Malinau on Kalimantan Island of the Republic of Indonesia. They generally identify themselves as Lun Bawang in Sarawak and Lun Dayeh in Indonesia because of assimilation into these larger speech communities. This preliminary study examines phonetic aspects of the Lengilo language, focussing on vowels, consonants and diphthongs. To collect the data, a Swadesh list of 100 words was used. The informant interviewed was an 80-year-old native speaker of Lengilo. The results show that the Lengilo language has six types of consonants, three types of vowels and diphthongs. The six consonants are plosive, nasal, fricative, trill, lateral, and partial vowel. The Lengilo consonants do not occupy all the initial, middle and final positions of words. For example, velar plosive [g], alveolar fricative [s], glottal fricative [h], and lateral-alveolar [l]. The eight vowels in Lengilo are narrow front vowel [i], semi-narrow front vowels [e], semi-wide front vowels [ɛ], wide front vowels [a], semi-wide middle vowel [ə], narrow back vowel [u], semi-narrow back vowel [o], and semi-wide back vowel [ͻ]. The three types of diphthongs in Lengilo are [ai], [ui] and [oi]. The diphthong [ai] appears to be more productive than the diphthong [ui] and [oi] which are quite limited in number. The initial description of the Lengilo language is important for comparison with languages of indigenous groups in the Lun Bawang category.

Revisi Peta Distribusi Ikan Padi (Adrianichthyidae: Oryzias spp.) Berdasarkan Identifikasi Morfologi di Paparan Sunda Indonesia

Members of the Adrianichthyidae family share typical distributions, as does the javanicus group, which inhabits western parts of Southeast Asia. Javanicus group members, specifically Oryzias javanicus and Oryzias hubbsi, is the only Adrianichthyidae species that can be spotted in Sundaland Indonesia. Morphological identification and the species distribution mapping of Oryzias specimens from Sundaland in this study were interpreted using ecoregional and dendogram tree approach. Specimens were collected from 11 areas representing five ecoregions in Sundaland Indonesia. Specimens were collected from islands of Java, Sumatra, Belitung and Kalimantan. Six individuals from each population of Oryzias were sampled for morphological identification. Specimens collected from estuaries were morphologically identified as O. javanicus and specimens from freshwater identified as O. hubbsi. Distribution of O. hubbsi from Salatiga is the first record from Central East Java (CEJ) ecoregion, which was previously only distributed in Southern Sumatra-Western Java (SWJ) ecoregion. Morphology of O. hubbsi from Sundaland Indonesia has mean of Standard Length (SL) 1.56 cm, Total Length (TL) 1.94 cm, Anal rays (A) 16, Pectoral rays (P) 8, and Dorsal rays (D) 6. Meanwhile, morphology of O. javanicus from Sundaland has mean of SL 2.07 cm, TL 2.56 cm, A 22, P 11, and D 6.

Forecasting Palm Oil Production Using Long Short-Term Memory (LSTM) With Time Series Cross Validation (TSCV)

Oil palm plant (Elaeis guineensis Jacq.) is a plantation crop that has a high economic value for Indonesia, because the results of oil palm plantations can increase the country's foreign exchange. Oil palm plantations can create jobs for the people of Indonesia, thus reducing unemployment in Indonesia. Oil palm plantations in Indonesia have spread to various regions, besides being found on the islands of Sumatra and Kalimantan, now oil palm plantations are almost found in various regions in Indonesia both small-scale plantations and large-scale plantations. This research uses historical data in the form of monthly palm oil production to predict the price of strategic food commodities. The period of palm oil production used is from January 1997 to December 2023 obtained from the website of PT. X or documentation data at PT. X. In this study the data was divided into 4 data scenarios using the Time Series Cross Validation (TSCV) method. The results of palm oil production modeling with LSTM that have been carried out show that palm oil production data shows differences in forecasting values and accuracy in the number of neurons and epochs used. The conclusion of this study is that from data processing and analysis in the previous chapter, it can be concluded that forecasting the amount of palm oil production in PT X can be modeled with LTSM and SARIMA method using Time Series Cross Validation (TSCV) data.