Socio-economic determinants of willingness to pay for safe and sustainable water supply in coastal urban areas

Background:  In many urban developing countries, the main obstacle to expanding and providing piped water supply is the cost to consumers. The coastal area of Bandar Lampung City is a slum seaside area that has a poor piped clean water supply system that requires improvements to various aspects of the system. So it is important to estimate the Willingness to Pay of the community to improve the quality of sustainable clean water which is determined by their socio-economic characteristics. The purpose of this study is to identify the amount of willingness of the residents of the coastal area of Bandar Lampung City to improve the quality of clean water. Methods: The analytical method used is descriptive quantitative with Willingness calculations and binary logistic regression. This study will take a sample of 100 families living in Teluk Betung Selatan District, Teluk Betung Timur, Bumi Waras District, and Panjang District as areas that are in direct contact with the coastal area of Bandar Lampung City. Finding: The results of this study indicate that the average willingness of PDAM customers to pay to improve the quality of clean water is  IDR 99,000 with gender and number of family members. Meanwhile, for residents who are prospective PDAM customers, the average willingness to pay is IDR 130,283 and the influencing factors are age and type of work. Conclusion: It can be seen that the willingness of the community to improve the quality of drinking water is quite high. The results of this study are as a reference for relevant stakeholders to improve the quality of clean water due to the high willingness of the community to pay in the coastal area of Bandar Lampung City. Novelty/Originality of this article:The novelty of this study lies in its contextual analysis of community willingness to pay for clean water improvement in coastal urban slum areas, an aspect rarely examined in previous research on water economics in Indonesia

From awareness to action: Understanding urban community participation in tree planting initiatives

Background: Tree planting activities in urban areas are an important strategy to enhance the environmental quality for the communities living in those regions. Tree planting offers numerous benefits that can be experienced in daily life, which is why it is essential to raise awareness, particularly among urban communities, to engage in tree planting around their residential area. In addition to the benefits gained from tree planting, there are also potential drawbacks that can arise from planting trees in urban areas. This article aims to examine the awareness behaviour of tree planting and the barriers faced by urban communities in this regard. Methods: Through a literature review and a study of the perceptions of the community in Tangerang City, this research identifies the factors influencing individual decisions to engage in tree planting and measures the positive impacts generated by such initiatives. Findings: The primary motivations of residents for tree planting are to improve air quality, reduce temperatures, and simultaneously enhance the beauty and aesthetics of the surrounding environment. Additionally, participation in urban tree planting is often influenced by environmental awareness, community support, and government policies. Some of the benefits of tree planting include improved air quality, CO2 emission absorption from human activities, and the enhancement of green spaces that positively impact public health. Conclusions: This study concludes that increasing awareness of the benefits of tree planting, along with support from the government and communities, can encourage broader participation in these activities. Policy recommendations include promoting tree planting programs, providing incentives for participants, and strengthening cooperation among stakeholders, all of which are expected to achieve more optimal outcomes in urban environmental management. Novelty/Originality of this Article: This study offers a novel perspective by exploring the awareness behavior and barriers faced by urban communities in tree planting, particularly in Tangerang City, Indonesia. Unlike previous studies that primarily focus on environmental impacts, this research integrates social perceptions to provide a comprehensive understanding of community motivations and challenges

Simulation of hybrid push/pull production system for cost reduction and resource optimization in sustainable automotive manufacturing

​​​Background: The rapid development of the automotive industry requires an efficient production system to minimize costs and optimize resources. PT XYZ, an automotive component manufacturer, previously relied on a push production system based on demand forecasts. However, discrepancies between forecasted and actual demand led to excess inventory and increased storage costs. To address this issue, a hybrid push/pull production system was introduced, aiming to balance inventory levels while maintaining production efficiency. Methods: This study employs a discrete event simulation method using Arena software to analyze the impact of implementing a hybrid push/pull production system at PT XYZ. The research utilizes company data from October 2016 to compare the efficiency of different production scenarios. Findings:  Findings indicate that adopting a hybrid push/pull production system significantly reduces inventory costs while preventing backorders. The system modifies the upstream process by transitioning from forecast-based production to a pull system that aligns with actual demand. Meanwhile, the push system remains in use for raw materials and semi-finished components to ensure production continuity. Additionally, worker and machine utilization decreased, allowing the company to reallocate resources for other product lines, thereby enhancing production capacity. Conclusion: The study concludes that implementing a hybrid push/pull production system provides PT XYZ with a competitive advantage by reducing operational costs without compromising demand fulfillment. However, this system requires careful inventory tracking and employee adaptation. In the long run, reduced storage costs lead to substantial savings. Novelty/Originality of this article: The novelty of this research lies in its application of hybrid push/pull production to an SME automotive manufacturer in Indonesia, demonstrating its effectiveness in reducing costs and improving resource utilization.

Green innovation for sustainable urban ecosystems: Overcoming challenges and promoting eco-friendly practices

​​​Background: Urban expansion has led to severe environmental degradation, often outpacing sustainability efforts. Green innovation, which integrates eco-friendly technology and economic models, offers a solution. However, its success depends on human involvement, including policymakers, scientists, and engineers. This study examines the role of humans in implementing green innovation in Jabodetabek, a densely populated and economically active region in Indonesia. Methods: This research employs a literature review to analyze existing studies on green innovation, focusing on its application in urban areas, particularly Jabodetabek. The review identifies key challenges and opportunities related to the adoption of green innovation in densely populated regions. By synthesizing the findings, the study examines the role of human involvement—policymakers, scientists, engineers, and communities—in overcoming obstacles and promoting green innovation. Findings:  The findings reveal that while green innovation is essential for creating a sustainable urban ecosystem, its implementation in Jabodetabek faces three major obstacles: lack of public awareness, high implementation costs, and regulatory uncertainty. Limited understanding among the public slows adoption, while significant financial investment is required to develop and apply green technologies. Additionally, inconsistent policies create barriers to implementation. To address these challenges, collaboration between the government, private sector, academics, and communities is crucial. Three main factors can accelerate the adoption of green innovation: strengthening regulations to support sustainability, developing better funding mechanisms to encourage investment, and promoting lifestyle changes that encourage eco-friendly habits. Conclusion: Green innovation is vital for sustainable cities, and human efforts play a key role in its success. In Jabodetabek, systematic and collaborative action can overcome obstacles and enhance both environmental and social well-being. Novelty/Originality of this article: This study highlights the role of humans in green innovation, emphasizing collaboration, commitment, and creativity, and explores how human efforts can drive sustainability in urban areas

Spatial risk assessment of population density and land use: Challenges and solutions for sustainable urban development

Background: The growth of major cities is directly related to the increasing population and rising density. The Special Capital Region (DKI) of Jakarta is the most densely populated, with 15,292 people/km² and a population growth rate of 1.11% per year. Land use in Kapuk Village consists of five main types, including residential, religious, socio-cultural, commercial, and other uses. The dominant land use in Kapuk Village is for residential purposes, covering an area of 2.566 km². Kapuk Village is the most densely populated village in Indonesia. Building density is related to the number of residents living in the area. Kapuk Village has the highest population, with a total of 174,349 people and a population density of 34,014 people/km². Vertical housing is a spatial planning concept where housing is built upward and can address land limitations in urban areas. According to data from the Jakarta Provincial Government, slum settlements in Kapuk Village cover an area of 2,594 km² or approximately 50.57% of the total area of Kapuk Village. Methods: This study employs a qualitative approach with descriptive analysis, integrating literature reviews and secondary data from the Central Statistics Agency and Jakarta Provincial Government. Spatial analysis techniques are applied using land use maps, building density maps, and slum settlement distributions to examine the correlation between population density and urban development patterns. Findings: The study reveals that residential land dominates Kapuk Village, covering 2,566 km², with slum areas comprising 50.57% of the total land. High building density contributes to limited open spaces and increased surface temperatures, affecting urban livability. The demand for social services, education, and healthcare surpasses available facilities, worsening urban disparities. The study also identifies the potential of vertical housing as a sustainable solution to accommodate the growing population. Conclusion: The research highlights the urgent need for strategic urban planning to address land use inefficiencies and mitigate the negative impacts of overpopulation. Vertical housing, combined with improved infrastructure and social services, can enhance urban resilience. Novelty/Originality of this article: This study provides a comprehensive spatial analysis of population density and land use in Kapuk Village, highlighting the direct impact on urban sustainability. It offers a novel perspective on integrating land use planning with social and environmental factors to promote better urban management strategies

Systematic study of political ecology and the role of local community in the development of the Ibu Kota Nusantara

Background: The development of the Indonesian Capital City (IKN) represents a transformative initiative aimed at relocating the capital from Jakarta to East Kalimantan to mitigate environmental degradation and promote equitable regional growth. This study investigates the ecological and social implications of IKN development by reviewing relevant literature and emphasizing the role of local communities and pentahelix collaboration in fostering sustainable outcomes. Methods: A systematic literature review was conducted using PRISMA and SALSA methodologies to screen 215 articles, of which 15 met the inclusion criteria for detailed analysis. Findings: The review revealed significant challenges—including ecological disruption, social inequality, and the marginalization of indigenous rights—while identifying pentahelix collaboration as a critical mechanism for integrating efforts from government, academia, the private sector, media, and community stakeholders. Conclusion: The study concludes that enhancing pentahelix collaboration and empowering local communities are essential for mitigating adverse impacts and achieving sustainable, inclusive development in the IKN context. Novelty/Originality of this article: This research introduces a novel framework that links political ecology with social justice and ecological sustainability, offering innovative insights for policy interventions that prioritize long-term equity and environmental stewardship

The impact of economic growth on urbanization, transmigration, employment opportunities, and urban population in the context of middle-income trap (a case study of Padang, West Sumatra)

Introduction: Padang, West Sumatra is especially concerned in this article where the causal effects between the economic growth, urbanization, transmigration, employment, Middle-Income Trap are explored. This study enhances the understanding of interdependencies of factors affecting economic growth, employment opportunities and urban population in Padang, and offers practical guidelines in managing the issues encountered by the city. Methods: In conducting this study, quantitative research method known as System Dynamics method is employed and in addition to this a literature study as a qualitative method is also conducted to have an overall understanding about the system dynamics of the various factors that affect the economic growth, employment opportunities and the population in Padang city. Findings: The findings also indicate that economic growth enhances the welfare of the of the urban residents while it degrades the employment probability. Although there are great gains on the economic aspect, the unemployment rate is not remarkable which means that it continues to be high. This can be attributed to the middle income trap which shows that the Padang economic growth does not translate to improved employment rate. Conclusion: For Padang to avoid falling into middle income trap as well as employment problem the government should take the challenges of job creation and better quality jobs in the formal sector, improve the quality of education and training and promote innovation and creativity. Moreover, the government is required the key causes which led to unemployment levels like poverty and income inequality, the poverty reduction policies is compulsory on the countryside

Kesehatan kerja pada pekerja industri tekstil yang terdiagnosis kanker akibat zat karsinogen

Pendahuluan: Perkembangan industri yang pesat memberikan dampak positif bagi kehidupan manusia, tetapi, terdapat dampak negatif yang terjadi dari perkembangan industri yang memberikan lapangan kerja, yaitu timbul penyakit akibat paparan bahan yang digunakan selama proses produksi. Tujuan penelitian ini untuk mengetahui uraian kasus mengenai pekerja tekstil yang terdiagnosis kanker. Metode: Penelitian dilakukan secara lapangan dengan target pekerja yang telah terdiagnosa kanker. Para pekerja merupakan pekerja atau pernah bekerja di bidang industri tekstil. Temuan: Studi kasus ini memberikan wawasan tentang risiko kanker yang dihadapi oleh pekerja industri tekstil di Purwakarta pada periode 2018-2019. Mayoritas pasien yang terdiagnosa menderita kanker paru-paru adalah mereka yang terpapar bahan-bahan berbahaya di lingkungan kerja, terutama asbes dan zat-zat karsinogenik lainnya. Faktor risiko tambahan juga memengaruhi kehidupan pekerja. Kesimpulan: Penelitian ini menyimpulkan bahwa diperukan bentuk pencegahan untuk mengatasi persoalan pekerja di Industri teksit.  Salah satu cara yang dapat dilakukan, yaitu penggunaan alat pelindung diri (APD), pemeriksaan kesehatan berkala, pendidikan dan pelatihan tenaga kerja, rotasi pekerjaan, pengawasan dan penegakan aturan, kolaborasi dengan ahli K3, serta evaluasi dan pemantauan berkelanjutan. Melalui implementasi tersebut diharapkan mampu menciptakan lingkungan kerja yang lebih aman dan sehat, serta mencegah risiko penyakit akibat kerja bagi pekerjanya

Environmental carrying capacity modeling using system dynamics in the context of smart sustainable city: Jakarta case study

Introduction: In Jakarta, rapid urbanization and population increase have led to serious environmental problems such air pollution, water scarcity, and land degradation. Excessive economic activity and population growth are placing pressure on the city's environmental carrying capacity, which is leading to a decline in living standards and an increase in demand on natural resources. Green open space in Jakarta has decreased significantly, currently at 9.8%, below the minimum requirement of 30%. Methods: This study uses a system dynamics approach to assess Jakarta’s environmental carrying capacity in the context of a sustainable city.  Finding: The study shows that Jakarta’s land carrying capacity has decreased since 2018, with indications that water carrying capacity will decrease by 2032 if Jakarta do business as usual. Future scenario suggest that reducing the rate of land turnover and improving water flow will significantly improve the city’s environmental sustainability. For example, reducing land change by 20-40% can restore land carrying capacity by 2040. Conclusion: By implementing policies that focus on reducing land change and improving water infrastructure, Jakarta can improve the quality of life and quality of life for its residents. The novelty of this study is that it integrates the concept of smart sustainable cities with system dynamics modelling to assess environmental sustainability and provides a comprehensive framework that can be adapted by other cities facing similar challenges. The report highlights gaps in current practices, such as the need to better integrate water and green space infrastructure, advanced technologies for water management, and overall land restoration strategies.

Sustainable urban farming management: a comparison study in Thailand and Indonesia

Introduction: Urban farming is the process of producing food and other products on urban land that provides social and environmental benefits and reduces negative environmental, social and health impacts associated with urban production and consumption patterns. This article identifies the key characteristics of urban agriculture in Thailand and Indonesia, focusing on the approaches and administration of production and distribution procedures. Methods: The approach employed in this article involves descriptive analysis, utilizing data sources derived from literature reviews of diverse scientific articles associated with urban farming management in Thailand and Indonesia in the 2015-2023 timeframe and then comparative analysis. Findings: Urban farming management in Thailand, especially in the Bangkok Metro Regions (BMR), and in Indonesia, especially in Jakarta, faces various challenges. The BMR in Thailand has been trying to improve food self-sufficiency since 2010, utilizing canals as a source of irrigation and transportation, and has the constraint of the lack of connection of urban agricultural actors to traditional markets. High population density and conversion of agricultural land in Jakarta are serious problems, especially after the 1998 economic crisis, urban agriculture developed with residents using land for agriculture, but uncertainty over land rights increased due to industrialization. Conclusion: A challenge in urban agriculture management in Thailand and Indonesia is the lack of coordination in urban agriculture regulations and infrastructure and stakeholders can address this through better communication between urban agricultural actors, retailers, and non-farming households