One of the objectives of sustainable city concept development is to realize the city, according to its historical, social and cultural background. City morphology is an accumulation process of physical manifestation of non-physical life, which is influenced by the values and norms system of the community. Indonesia is known as a multicultural plural country. Coastal cities are multicultural city typologies that form and evolve with multi-ethnic societies, forming heterogeneous city structures with new cultures through the process of acculturation. Communal space is one of the constituents of urban space structures which function is to support the ideal social, cultural and environmental aspects. The study of the dynamics of communal spaces is important to discover the characteristics of space and architectural concepts that shape urban morphological and cultural structures. This study applied morphology approach on spatial settings at historical urban multi-ethnic settlement through physical and non-physical observations. The descriptive analysis of morphological communal space pattern relates to six variables of a “Good Public Space Index”. The morphological pattern of Gresik City is dominated by multi-ethnic settlements. The history of Gresik as a center of learning and dissemination of Islam has shaped the Gresik community to have a strong religious life as reflected in Islamic rituals. The settlement dominated by household industry, craftsmanship, and small-scale trading, shows that entrepreneurship activities as social-economy activities have highly supported daily religious ritual activities. The pattern of communal space is dominated by two prominent characteristics of socio-economic activity and socio-cultural activity. The communal spaces in this area have a high intensity of use and social use, which indicate their important function in the daily activities of the community. The square serves as the center of urban communal space with appropriate functions for economic and cultural activities simultaneously, which are carried out democratically through time-sharing.

This paper discussed a new perspective on the path of sunlight as a basis for urban phytoarchitecture design, which empowers the ability of plants to absorb carbon dioxide and simultaneously lowers the surface temperature. The aim was to provide options for intensifying greenspace orientation and plant types as one of the goals of a sustainable city. This research analysed previous research sources collected from the reference management platform. The literature selection uses the keywords greenspace, orientation, carbon dioxide, and surface warming, all of which are the latest publications. The result for the first option was the orientation of the greenspace following the path of sunlight. For urban infrastructure in a North-South direction, it was advisable to intensify greenspace by planting trees that absorb large amounts of carbon dioxide. In addition, it was recommended to apply biodiversity to enhance the absorption of the gas. For East-West oriented infrastructure sites, intensifying greenspace with sunshade trees was the right choice, and biodiversity was not a limiting factor because it does not support leaf area growth. While the first option cannot be followed due to existing field conditions, the second option is intensifying tree species with biodiversity, which can absorb carbon dioxide and reduce surface warming.

Clean water provision is the sixth goal of SDGs, in which all countries are struggling to achieve those goals. Indonesia is archipelagic where only 12.38% or around 2,342 islands are inhabited by a total of 17,504 islands. Clean water provision for all inhabited islands, particularly for small islands, have been a significant issue for Government of Indonesia. Availability of fresh water, ground and surface, in a small island is often critical since the island is surrounded by the sea. Hydrological process in providing annual regional fresh water is relatively stagnant. Tarakan City is an island city, located at north-east of the mainland of Kalimantan. Water provision planning is important to close the gap between the supply and demand. The latest local statistics data of population in Tarakan (2015) was 227,200 people [1] and therefore the estimated maximum demand of fresh water was 74,158,080 liters per day or 838.3 liters/second. The capacity of Local State Own Water Enterprise was only 400 liters/second, less than half of the demand. Strategies that can be taken, apart of the efforts to maximize efficient use to save water, are to minimize storm water run-offs, promote better land use planning, and strictly preserve watershed regions to have at least 30% green area.

Coal mining activities has been accused as the generator of environmental hazards in many part of the globe. However, this non-renewable source of energy is still one of major sources of local revenue in Kalimantan (Burneo Island) Indonesia. To formulate the best policies regarding mining regulation in the future, it is important to identify the social impact of mining and to assess the level of social sustainability of the impacted area, i.e., impacted area of coal mining operated by the largest coal mining company in Indonesia, Kaltim Prima Coal (KPC). The social impact was analyzed by Social Impact Assessment (SIA) method while the social sustainability was assessed by Community Sustainability Assessment (CSA) method. The result shows that mining activities operated by KPC has created positive impacts on 3 social dimensions: social-institutional, social-economic, and social-environment. The activities has also increased social sustainability of the district from moderate (before mining activities) to high (on-going coal mining activities). The result indicates that KPC has practiced good coal mining activities that can be improved furthermore to become the benchmark of good coal mining practices in Indonesia and the government must refer best practices available into regulation.

MATEC Web of Conferences, open access proceedings in Materials science, Engineering and Chemistry

Atag functions as a place for the air curing process to dry tobacco leaves. This building, which is made of bamboo, has existed in Indonesia since 1850 and used to produce authentic quality cigars. Initially, this building was only utilized for local materials, however, based on the shape, dimensions, and construction, there is a tendency for atag to be established by considering several technical aspects. Therefore, this study aims to examine the technical ideas, such as calculations, practices, and procedures for making Atag using the ethnomodelling strategy. The results showed that the community's practices and calculations in building atag were a logical response in adapting to natural conditions such as climate, wind, and humidity. It also provided intelligence in utilizing the potential of local materials such as bamboo and sugarcane leaves