Adaptive reuse of vacant houses in Japan offers an innovative and sustainable solution to the increase in vacant houses. This approach aligns with principles of sustainable architecture and the circular economy by reducing waste, lowering energy consumption, and extending the lifecycle of existing structures. This study uses purposive sampling, analyzing 262 adaptive reuse cases across Japanese prefectures through partial surveys, municipal records, and online maps. K-prototype clustering identified three distinct patterns. Cluster 1 emphasizes modern businesses, such as food, beverage, and accommodation services, within urban areas to address the needs of densely populated regions and tourist hubs. Cluster 2 blends urban and rural contexts, balancing historical preservation with modern functionality. Cluster 3 highlights rural and scenic accommodations that cater to tourists seeking cultural immersion and authentic experiences, despite challenges like low population density and limited accessibility. These findings contribute to the theoretical understanding of adaptive reuse as a key strategy for repurposing underutilized spaces, promoting both economic and social resilience. In practical terms, it demonstrates how adaptive reuse advances circular economy objectives by preserving cultural heritage, enhancing environmental sustainability, and creating economic opportunities. Further investigation is needed to unlock the unexplored potential of adaptive reuse in broader contexts and functions.

Urbanization is an undeniable phenomenon that happens globally, including in Indonesia. Indonesian cities are growing, causing urban sprawl and transformation of rural areas into urban areas. In between the urban and rural there is peri-urban area that has unique mixed characteristics of both. Areas with such characteristics can be found easily in the outskirts of Bandung city. The growth of peri-urban areas in Bandung occurs simultaneously with the growing tourism industries. This phenomenon caused a spatial transformation especially to the existing houses, which gives impacts to the livability of the area. This article would focus upon how housing transformation in peri-urban areas can affect the livability of the area by using the North Bandung peri-urban area as a case study. The result shows that the spatial transformation that happens in peri-urban areas gives positive impacts to social, economy, and spatial aspects, but unfortunately not the environmental aspects.

Industrial Revolution has a significant contribution to forming the global cities. Many developments happened dictated by Industrial needs simultaneously with increasing number of populations by urbanization. One part of development to support industrialization and urbanization is infrastructures. Infrastructures such as street for cars and train railway. The development of infrastructures is affecting health, social, economic, and environment of citizen. It is also responsible for the decline of quality of life in many global cities. As time goes by, another significant shift happens in many global cities. Infrastructure becomes outdated, industry leaves, the local economy deflates, residents flee and the community implodes. It leaves many derelict infrastructures, other facilities of industry, and diverse impacts. To tackle this situation, Urban Regeneration concept was introduced. Furthermore, landscape also can be used as a tool of urban regeneration concept that intended to improve quality of life in the cities. According to this situation, there are two projects that represent landscape project as urban regeneration. The first project is The Highline project in New York by James Corner Field Operations, Diller Scofidio + Renfro, and Piet Oudolf that revitalizing previous railway and Seoullo 7017 Skygarden in South Korea by MVRDV that revitalizing previous highway. The aim of this paper are to presents more insight and elaboration about how urban regeneration implemented in the cities from two landscape projects example and describe some critical review of both projects.

. This research conducted to determine the understanding of the civil craftmanship according to SNI 28847:2013 on requirements for Concrete Structural Building. The Indicator in this research are concrete material standard, reinforced concrete standard, and concrete on site construction standard. Respondents consisted of college students and several construction practitioners surveyed using online questionnares and interviews. Based on the results obtained by analysis of the distribution of about 132 respondents consisting 85 college students respondents and 47 construction practitioners with diverse background positions. The majority college student are 3rd and 5th semester student while construction Practitioners respondents with 0-5 years field experience. The result of this analysis also shows the level of understanding respondents to concrete indicator standard that is 72% respondent understand about concrete material standard, 53 % respondent understand about reinforced concrete standard, and 48% respondent understand about concrete workmanship standard on site construction.Keyword: SNI 2847:2013, concrete, craftmanship Abstrak: Penelitian ini dilakukan untuk mengetahui pemahaman ketukangan Sipil terhadap SNI 2847:2013 tentang Persyaratan Beton Struktural untuk Bangunan Gedung. Indikator dalam penelitian ini yaitu standar bahan beton, standar tulangan beton dan standar pengerjaan beton di lapangan. Responden terdiri dari mahasiswa dan praktisi konstruksi yang disurvey menggunakan kuisioner online dan wawancara langsung. Berdasarkan hasil analisis diperoleh sebaran responden sebanyak 132 terdiri dari 85 responden mahasiswa dan 47 responden praktisi dengan berbagai latarbelakang posisi. Sebagain besar responden mahasiswa duduk di semester 3 dan 5 sementara untuk responden praktisi yaitu tukang dengan pengalaman lapangan 0-5 tahun. Hasil analisis juga menunjukan tingkat kepamahan respoden terhadap indikator standar beton yaitu 72% responden paham mengenai standar bahan beton, 53% responden yang paham standar tulangan beton dan 48% responden yang paham standar pengerjaan beton di lapanga. Kata Kunci: SNI 2847:2013, beton, ketukangan

In the global context, the phenomenon of urban shrinking has grown increasingly prominent in many cities. It poses challenges to urban planning and regional development, such as the occurrence of vacant houses. In the context of Japan, the demographic condition has substantially changed over the last few decades into a declining and aging population. The situation has been discussed in many articles as the main factor in the proliferation of vacant houses across the country. Regarding this issue, this study aims to examine the correlation between the age structure composition and the number of vacant houses according to the classification of vacant houses. The study employs quantitative analysis based on the official government data of vacant houses and age structure composition. The study found that there was a strong positive correlation between the age structure composition and the number of vacant houses. Furthermore, the study revealed that areas with a higher percentage of elderly residents tended to have a higher number of vacant house rates. Nevertheless, the investigation also revealed significant correlations with other age groups, indicating that vacant houses are not exclusively influenced by the elderly population but rather by a more intricate demographic landscape. Understanding the impact of age composition on vacant houses can help policymakers develop targeted strategies to address this issue. By focusing on areas with a high percentage of elderly residents, urban planners can implement initiatives to revitalize neighborhoods and reduce the number of vacant properties.

This study discusses mechanical properties and analysis of composite materials to develop building bricks for structural lightweight concrete replacement applications made from three different waste materials, i.e. sawdust, polyethylene terephthalate (PET) plastic bottle, and used diaper. All waste materials are used to mixture composite, as cement replacement, with a mixture of 0, 5, 10, 15, and 20 percent of the total weight. This study uses a quantitative method with the sample used as cylindrical tube with 20 mm of diameter and 40 mm of height. Tests were carried out in the form of compressive and specific gravity tests to determine the mechanical and physical properties of the composite material. The use of waste materials as mixtures for composite manufacture with a water per cement ratio of 0.4 at the age of 28 days results in the best compressive strength of 20.70 MPa (5 percent of sawdust), 33.04 MPa (5 percent of PET), and 18.05 MPa (5 percent of used diaper). The density value shows that the addition of waste materials tends to decrease the weight of the composite result. Based on these results, it can be concluded that the use of waste composite materials is a potential replacement for lightweight structural concrete as an effort to reduce the cement requirement for building material applications. DOI: 10.17977/um024v7i22022p092