Housing Production Research Articles

Tunnel-Ventilated Sheds with Negative Pressure Reduce Thermal Stress and Improve the Meat Quality of Broilers.

This study aimed to evaluate the thermal performance and meat quality in broilers reared in positive pressure tunnel ventilation (PP) and negative pressure tunnel ventilation (NP) in production houses. 320 Cobb broilers (40 broilers per house) were used. Pectoralis major muscles from 40 broilers (10 broilers per house) were randomly selected and analysed for L* (lightness), a* (redness), b* (yellowness), pH, drip loss (DL), cooking loss (CL) and shear force (SF). Air temperature and humidity of the transportation and slaughterhouse waiting room were recorded in the last week of rearing. Subsequently, the enthalpy comfort index (ECI) was calculated. Air temperature and ECI were higher (p < 0.05) in positive pressure sheds, whereas relative humidity was higher (p < 0.001) in negative pressure sheds. There was no statistically significant difference between the enthalpy comfort index during transport and lairage (p > 0.005). Meat quality defects (high L*, DL, CL, SF) were found in PP and NP. It was observed that b* was higher in PP, although pH and CL were higher in NP. Differences in pH, b* and CL indicate that broilers from PP had a higher level of heat stress. In conclusion, differences in pH, b*value and cooking loss in breast broilers indicate that birds in PP had a higher level of heat stress. Additional studies investigating pre-slaughter handling methods to minimise injuries and heat stress are recommended in order to improve animal welfare and meat quality.

Sustainable Structural System Selection Using Hybrid Fuzzy Multi-Criteria Decision Model Based on Seismic Performance

In the rapidly evolving field of sustainable construction, this study aims to address the critical need for advancement in the building industry, focusing on vital indicators like energy efficiency and cost-effectiveness, as well as improving occupant comfort. This research introduces a novel approach to support the choice of suitable structural systems for mass housing projects, with a case study on Iran’s national housing scheme. This methodology involves a four-phase process, beginning with compiling a database from existing studies to outline primary and secondary indicators affecting structural system selection. It utilizes the fuzzy AHP method for criteria prioritization and the fuzzy TOPSIS technique for alternatives (LSF, 3DP, ICF, TRC, and RCCF). The study identified the light steel framing (LSF) system as the optimal choice for Iran’s housing needs based on various criteria. Then, in the final phase, the study evaluates the seismic performance of cold-formed steel (CFS) frames with various sheathing panel types (OSB, DFP, CSP, and GWB) under monotonic loads, examining key seismic parameters across 38 frame setups. The findings reveal that LSF structures can effectively withstand seismic events within the elastic behavior range, suggesting that this construction approach is viable for enhancing mass housing production in Iran’s construction sector.

Identification of N, P, and K in Solid Waste from Palm Flour Production and Their Benefits as Organic Compost Fertilizer Ingredients

The palm flour manufacturing industry produces a lot of liquid waste and solid waste. The absence of a waste processing system means the waste is dumped around the production house. The large amount of solid waste that is dumped every day causes a buildup of waste on riverbanks. The flow of river water is disturbed, pollutes the river ecosystem, and the smell is unpleasant. The research aims to identify the content of N, P, and K elements in palm flour solid waste. The data obtained will be used as a basic reference for using palm flour solid waste as an alternative compost material considering that most of the Pucang Miliran village area is an agricultural area. The research was carried out by taking a sample of 1 kg of sugar palm flour solid waste and testing it for the content of N, P, and K. Data from laboratory tests were analyzed descriptively supported by a literature study. The research results showed that palm flour solid waste contained Nitrogen (N) of 194.227 mg/Kg, Phosphorus (P) of 410.270 mg/Kg, and Potassium (K) of 832.382 mg/Kg. The presence of the three nutrients N, P, and K in large enough quantities can be considered that palm flour solid waste can be a good alternative material for making organic fertilizer/compost. Further research is needed to determine the comparison and combination of various compost material compositions to produce the best palm solid waste compost.

Japanese Prefabricated Housing Manufacturers

Japanese prefabricated housing manufacturers have gained international recognition for their innovative approaches to the whole design process, ranging from initial design to innovative cutting-edge technologies, state-of-the-art automated production lines, meticulous workmanship, and mass customisation. In this entry, three manufacturers (Daiwa House, Sekisui House, and Misawa Homes) were selected as case studies for close examination. By studying these leading companies, researchers and industry professionals can gain valuable insights into best practices, challenges, and innovations within the Japanese prefabricated housing sector. The research methods involved a desktop study of available information on websites, articles, and reports, as well as undertaking two study tours on residential sustainable design in Japan in 2022 and 2023. These three manufacturers were discussed and compared with respect to their development trajectories, design customisation, research capabilities and technological advancements, sustainable initiatives and procurement, as well as their after-sale services. They have demonstrated their adaptability and flexibility in response to natural disasters and the transformation of the needs in society. They are all keen on reducing the environmental impacts of their work towards zero carbon emissions and a sustainable future.

Old and New Vallila. The early years of affordable housing production in Helsinki

ABSTRACT Vallila is a showcase of Finnish social housing at the beginning of the twentieth century. Old wooden Vallila was built 1908–1915. It consisted of 22 small building lots, all meant to be built as one family houses by standardized drawings. As times were poor, the population grew out of control. In 1908, Bertel Jung started his work as the first town planning architect of Helsinki. He signed the first town plan for New Vallila in 1913, aiming at a clearly urban environment. Houses of three to four floors height were regulated by detailed facade schemes. Trees and greenery were respected in New stone Vallila and some blocks were built around private courtyards (Swedish name: storgårdskvarter). The biggest and most impressive of them is the block 555, started in 1916 as a company dwelling, and finished as a semi-communal project in 1929. The architects were Armas Lindgren and Bertel Liljequist. During the 1920s townscape was internationally in the spotlight, and Finnish architects followed keenly Nordic and German examples. They read and travelled a widely. Contacts with Swedish colleagues brought the peculiar dwelling type of landshövdingehus from Gothenburg to New Vallila. Italian architecture gave faith in the ever-lasting value of classicism.

Pendampingan Rumah Produksi Telur Asin Pak Jaini Desa Masangan Kulon, Kecamatan Sukodono, Kabupaten Sidoarjo

The mentoring program for Pak Jaini's salted egg production house in Masangankulon Village, Sukodono District, Sidoarjo Regency is an initiative to improve the quality and capacity of local production. This activity aims to assist Mr Jaini in developing his business through the application of simple technology, business management training, and effective marketing strategies. The methods used in the mentoring programme include observation, interviews, and hands-on training in the field. The results of this mentoring programme showed significant improvements in product quality, production efficiency, and sales. Thus, this programme is expected to make a positive contribution to the local economy and become a model for other small and medium enterprises in the region

Design of an Electric Vehicle Charging System Consisting of PV and Fuel Cell for Historical and Tourist Regions

One of the most important problems in the widespread use of electric vehicles is the lack of charging infrastructure. Especially in tourist areas where historical buildings are located, the installation of a power grid for the installation of electric vehicle charging stations or generating electrical energy by installing renewable energy production systems such as large-sized PV (photovoltaic) and wind turbines poses a problem because it causes the deterioration of the historical texture. Considering the need for renewable energy sources in the transportation sector, our aim in this study is to model an electric vehicle charging station using PVPS (photovoltaic power system) and FC (fuel cell) power systems by using irradiation and temperature data from historical regions. This designed charging station model performs electric vehicle charging, meeting the energy demand of a house and hydrogen production by feeding the electrolyzer with the surplus energy from producing electrical energy with the PVPS during the daytime. At night, when there is no solar radiation, electric vehicle charging and residential energy demand are met with an FC power system. One of the most important advantages of this system is the use of hydrogen storage instead of a battery system for energy storage and the conversion of hydrogen into electrical energy with an FC. Unlike other studies, in our study, fossil energy sources such as diesel generators are not included for the stable operation of the system. The system in this study may need hydrogen refueling in unfavorable climatic conditions and the energy storage capacity is limited by the hydrogen fuel tank capacity.

Das House Kapital: A Long-Run Theory of House Prices and Housing Wealth

Abstract Over the last 70 years, many advanced countries have experienced growing real house prices and an increasing housing wealth-to-income ratio. To explain these long-run patterns, this paper introduces a novel multi-sector growth model where housing services are produced using non-reproducible land and reproducible structures. Land is also employed in the non-housing sector. First, we identify two fundamental mechanisms driving the long-run increase in the real house price: (i) technological progress in the construction sector lags behind the technological progress of the rest of the economy and (ii) housing production is more land-intensive than non-housing production. Second, we study transitional dynamics for the US, UK, France, and Germany. Our calibrated model explains most of the observed increase in the housing wealth-to-income ratio since 1950. Counterfactual experiments identify initially low stocks of residential structures and non-residential capital as key exogenous drivers for this increase. The associated investment incentives led to a long-lasting construction boom and steadily increasing land scarcity, boosting residential land prices.

Peri-urban landscapes and the potential of integrated foodscapes to support healthy cities: an Aotearoa New Zealand case study

ABSTRACT Aotearoa New Zealand is experiencing unprecedented competition in land use priorities on the edges of its cities and settlements – referred to as the peri-urban zone. Housing and food production compete with one another in a legislative planning context that supports a dichotomy of urban or rural land use. Food production is being driven further away from urban settlements, where 85% of New Zealanders live, as demand for housing increases, and land is re-zoned from rural to urban. Consequently, cities and settlements within Aotearoa New Zealand are increasingly seen to be spatially disconnected from their productive hinterlands. The resulting land use polarity occurring in the peri-urban zone is problematic for local food production, driving issues of agricultural land fragmentation, the loss of highly productive soils, ‘reverse sensitivity’, and impacts on human health and wellbeing. Engaging with both residents and food producers who reside and work within the peri-urban zone, this research applies a ‘design thinking’ methodology to the case study site of Ōtautahi Christchurch, exploring the question, ‘how can food production and housing best co-exist at the edges of Aotearoa New Zealand’s cities and settlements?’ to support human health and wellbeing outcomes. This paper presents five participant-driven future land use scenarios, which were developed based on survey responses collected from both peri-urban residents and food producers. The land use scenarios were then tested in a workshop setting with both groups assessing the potential of each scenario to address the land use conundrum that Aotearoa New Zealand peri-urban areas are currently facing, ultimately identifying land use strategies for healthier city areas that are designed for both housing and local food production.

Analyzing the Interactions among Barriers to the Use of Solar Energy for Heating in Residential Buildings in Van, Türkiye

In terms of environmental sustainability, the barriers—and interactions between these barriers—to the use of solar energy for active and passive heating in residential buildings stem from location-specific housing production patterns and the actors involved in these patterns. A clear definition of hierarchies and priorities between barriers helps managers set strategic priorities and action plans to find solutions. After the earthquake in Van in 2011, 6000 hectares of land were opened for new development, and research using the sampling method discovered that the most common type of housing production in the city is the build-to-sell housing production method. The actors involved in build-to-sell housing production are technical staff, local–central administrations, entrepreneurs, end users, landowners, financial companies, non-governmental organizations, and building inspection institutions. This article examines the barriers to the use of solar energy for active and passive heating purposes, the interactions between these barriers using ISM and MICMAC methods, and the build-to-sell housing production method and actors. Barriers were identified through a literature review and semi-structured interviews. The barriers were further categorized under eight main headings according to their subject matter. The hierarchies of barriers in creating problems and solutions were determined using ISM and MICMAC methods and the findings were interpreted. In the City of Van, with regard to the houses produced via the build-to-sell production method, the barriers against the use of solar energy for heating purposes in houses considering active and passive methods are ranked in order of priority in creating the problem and the solution. Barriers caused by political and administrative issues are ranked first; barriers caused by social awareness and end users are ranked second; barriers caused by social and sociological events are ranked third; barriers caused by laws and regulations are ranked fourth; barriers caused by the knowledge, skills, and awareness of designers are ranked fifth; barriers caused by deficiencies in technical issues are ranked sixth; and barriers caused by economic and financial issues are ranked seventh. Even though the barrier caused by the working mode of build-to-sell productions is the largest in creating the problem, it is the least effective barrier to solving the problem in the ISM hierarchical and MICMAC schemes. The research process is presented in the Methods section.

IoT Model for Production House Control from the Development of Wetland Commodity Start-up

Abstract A startup must have a realistic vision and a profitable business plan. It should be able to find customers willing to pay during the customer validation process. Products which customers are interested in must gain popularity consistently with repeatable and scalable startup business models. The aim of the research was to design an IoT model for production house control from the development of a Wetland Commodity Start-up. The business model was designed based on the concept of a Product-Service System (PSS) oriented towardscreating according to the wishes and needs of the users. The design thinking developed referredto 5 (five) stages of the process, namely Empathize, Define, Ideate, Prototype and Test. It was hoped the User would reach the stage of trying out the trial product after it had been made. Oneof the outputs was in the form of an IoT model implemented in an environmentally friendly wetland commodity production house. The advantages of this model were in terms of efficiency of electricity resources and smart monitoring based on mobile (Android &amp; IoS). The power source was carried out in a hybrid manner, that is electricity from PLN and solar panels, so that it could detect quickly when a power outage occurred and then automatically switch according to the availability of electric power. Another advantage was smart monitoring. With this feature, the model was able to monitor and control nutrients so it was in sufficient ppm concentration according to the growth phase of the commodity.

Research of the influence of temperature on the physical and mechanical properties of polymers for the manufacture of LED lamp housings

Methods for predicting of the influence of temperature on the physical and mechanical properties of structural polymer composite materials under development used in LED lamps are considered. Using the differential scanning calorimetry, the specific heat capacity and phase transformations of light-conducting polymers and samples of housings for lamps being developed are studied. The choice of fillers is carried out taking into account the optimization of the composition of polymer materials. Keywords:research, polymeric materials, temperature, hardness, elastic modulus, specific heat capacity, thermal analysis alekc_sap@mail.ru

Improvement and Roles of the USU Community Service Team in Educating Halal Certification to the Giat Maju Farmer Group in Parbuluan Village VI Dairi

Currently, the need for halal products has increased rapidly. Halal food has become a profitable business with the largest market share, especially in Indonesia. To improve the quality of the coffee products of the Giat Maju farmer group in Parbuluan VI Dairi Village, the USU community service team is given to educate about halal certification and how to register it. The product certification can expand the market reach of product buyers, and buyers will feel safe and comfortable. Thus, this can increase sales of partner coffee products. Some of the activities carried out by the community service team are identify the problem, socialization and education, document creation and collection, registration and completion of facilities and infrastructure, and assistance for registration of LPPOM MUI halal certification. From the socialization, partners strongly desire to obtain halal product certification by building new production houses, participating in halal certification webinars, and preparing all required documents for registration.

Usulan Perancangan Tata Letak Fasilitas Produksi Dengan Metode BLOCPLAN Untuk Meningkatkan Produktivitas CV. Madu Apiari Mutiara

CV. Madu Apiari Mutiara is a company that operates in the field of derivative honey products such as pure honey, candy, soap, and health products such as propolis and other derivative products which have various shapes and compositions. This condition makes it necessary to have the most efficient spatial layout of work areas and production facilities in order to increase work morale and work productivity in terms of the layout of production facilities. The method used to solve this problem is the BLOCPLAN method. This method can solve facility layout problems in CV Madu Apiari Mutiara production houses with the level of close relationship, area requirements, taking into account the distance of material movement and final layout. The area on CV. Madu Apiari Mutiara is 100 m2, the total area requirement is 70.48 m2. There are 3 alternative layouts in the BLOCPLAN method, the proposed layout chosen is based on the R-Score value which is close to 1, namely the 2nd layout with a material movement distance efficiency of 8.1 meters or 20.9%.

Beyond Functionality: Morphological Design Tools for Users’ Satisfaction in Housing

Various factors can affect an individual’s satisfaction level. While studying residential satisfaction and assessing it, subjective perceptions have the most significant influence. An essential element in ensuring satisfaction in housing is to consider the design of spaces that cater to individuals’ specific desires and needs that change over time. Housing was frequently constructed considering the specific subjective needs of individuals, before the era of industrialization. As industrialization rises, housing gradually transformed into a commodity. Certain researchers propose that studying traditional built environments and harnessing the data gained from such analyses can be advantageous for contemporary housing production. Notably, Habraken is a prominent researcher who sought to ensure users’ satisfaction in housing by devising the “Support System” rooted in his analysis of Dutch houses. Traditional house plans in Türkiye exhibit resemblances to the morphological arrangements observed by Habraken in Dutch houses, yet with some distinctive characteristics. In modern times, designers often prioritize function as the primary consideration. However, there have been attempts, such as Habraken’s, to shift towards prioritizing morphology instead. This paper will explain links between users’ satisfaction and their ability to change their immediate environments through morphologies that accommodate diverse functions.

Warding off Development: Local Control, Housing Supply, and NIMBYs

Abstract Local control of land-use regulation creates a not-in-my-backyard (NIMBY) problem that can suppress housing construction, contributing to rising prices and potentially slowing economic growth. I study how increased local control affects housing production by exploiting a common electoral reform—changing from “at-large” to “ward” elections for town council. These reforms, which are not typically motivated by housing markets, shrink each representative’s constituency from the entire town to one ward. Results from a variety of difference-in-differences estimators show that this decentralization decreases housing units permitted by 20%, with similar effects on multi- and single-family permits. Effects are larger in whiter and higher-income towns.

Exploring Ethnomathematics on The Batik Patterns of Jember In Mathematics Concept

This study aims to identify and describe mathematical concepts and describe the results of ethnomathematics exploration contained in Jember batik motifs. The type of research used in this study is qualitative research with an ethnographic approach. The research instruments used were observation, tests, and interviews with batik artisans. The results of this study indicate that the combination of coffee bean and tobacco leaf motifs has applied mathematical concepts of geometry. In the motif of coffee beans and tobacco leaves from the Nhora Pangetu hand-written batik production house, there are mathematical concepts of curves, points, circles, and the concept of dilation. The motif of coffee beans and tobacco leaves from the Gangsar Ngaidin batik production house contains mathematical concepts of reflection (mirroring), congruence, and flat shapes of circles, triangles, and rhombuses.

Building a resources-modulable approach as appropriate strategy to reduce and rehabilitate spontaneous housing area (SHA) in developing countries cities: the case of Mokolo in Yaoundé, Cameroon city

ABSTRACT Cities in developing countries are facing a critical housing deficiency, seen, for example, in Cameroon by an estimated deficit about two million units. Despite real estate programmes in response, supply remains very low compared to demand. It favours the growth of anarchical housing production so-called spontaneous housing area (SHA) or slums. High concentration of poor households in these informal areas coupled with their expansion (about 5.5% per year) is a real headache for population, government authorities who fight for the common good. A major challenge has been how to ensure access to land certificates, basic urban services and decent housing while fighting against urban sprawl and SHA growth. Within the framework of cognitive science, our study provides a multidisciplinary tool for calibrating rehabilitation of SHA based on eight technical criteria, and on profitability. It enables decision-makers not only to assess the degree of precariousness, but also to know in advance whether the intervention will be profitable. This determines whether rehabilitation is bankable for government or whether total destruction is better. Upon application on Mokolo, the case study region in Yaoundé, it revealed how it can be made affordable while reducing the slum rate from 54%–20%.

Relation between renovation and space density of small-type house in a row house pattern

Small type houses answer the need for residential housing in sub-urban areas. The increasing price of land and the affordability of buyers has encouraged the production of small type residential houses to increase. Small type residential houses have a land area of ≥ 90 m2 and a building area of ≥ 36 m2. However, small type residential houses do not fully answer space needs. Small residential houses tend to undergo renovation to meet space needs. This research uses quantitative descriptive methods. This research aims to formulate a pattern for renovating small residential houses using the case study of the Jasmine Cluster, Sawangan, Depok. This research is necessary considering that during the pandemic, homes are the safest areas for quarantine and as a means of self-isolation for those who are infected. The pandemic event has become a valuable lesson, especially for getting a healthy home. Efforts to fill the space in small type houses in the Jasmine Cluster are carried out by renovating the houses vertically and horizontally. The development was carried out because the existing space does not meet needs. Factors that influence the development of this residence are the number of family members and other rooms that are not provided by developers of small type residences. The density levels before and after renovation show significant changes, and become alternative solutions (quarantine and isolation) as a response to future pandemics.

Foraging animal origin food samples as passive indicators of dioxin-like POPs contamination in industry sites: Method development, characterisation and risk assessment

Titanium dioxide (TiO2) is an important industrial chemical, and studies suggest its major production route - the chloride process could lead to the generation of unintentional dl-POPs. However, no relevant studies assessed the occurrence of dl-POPs associated with TiO2 production in the industrial zones, which is mostly due to the ultra-trace level distribution of these compounds in environmental compartments. The present study explored the novel possibility of utilising foraging animal-origin foods as sensitive indicators for addressing this challenge and generated a globally beneficial dataset by assessing the background levels of dl-POPs in the vicinity of a TiO2 production house in Southern India. Systematic sampling of foraging cow's milk and free-ranging hen's eggs was carried out from the study site, and the dl-POPs assessments were conducted utilising an in-house developed cost-effective GC-MS/MS-based analytical methodology. The median dl-POPs levels in milk and egg samples were about 3 times higher than the control samples collected from farm-fed animals and retail markets. The contaminant loads in the foraging animal-origin food samples were further traced to their presence in environmental compartments of soil and sediment and admissible degree of correlations were observed in congener fingerprints. Elevated health risks were inferred for the population in the industrial zones with weekly intakes weighing about 0.15–17 times the European Food Safety Authority-assigned levels. The consumption of foraging cow's milk was observed to have a higher contribution towards the hazard indices and cancer risk estimates and were significantly higher (p < 0.05) for children. The study also presents a critical validation of the GC-MS/MS-based method for the purpose of regulatory monitoring of dl-POPs, which could be of practical significance in economies in transition.