ENVIRONMENTAL DESIGN
Permanent URI for this collection
Browse
Recent Submissions
1 - 5 of 1002
- ItemASSESSING INTERELATIONSHIPS AMONGST CRITICAL SUCCESS FACTORS FOR THE ADOPTION OF CIRCULAR PUBLIC PROCUREMENT(2025-04)Circular procurement occurs when the buyer purchases products or services that follow the principles of the circular economy, supporting the assessment of designing, making, selling, reusing and recycling products to determine how to get the maximum value from them, both in use and at the end of their life”. The need to reduce waste and resource inefficiency in public procurement and the need for a transition to a Circular Economy (CE) led to the development of circular public procurement (CPP). Despite the benefits of CPP, the adoption remains very low. The aim of this study is to assess the interrelationships amongst CSFs for the successful adoption of CPP. The study adopted a quantitative research approach using a questionnaire survey. The population of the study was made up of 943 Ministries, Departments and Agencies (MDAs) while the sample size was 281 MDAs. Descriptive statistics was carried out (mean, standard deviation and frequency table) using SPSS and structural equation modeling was performed with the aid of PLS to assess interrelationships amongst critical success factors for the adoption of circular public procurement. The findings revealed that organizational circular public procurement competency has a significant and positive effect on planning and monitoring (P Value < 0.01). Also, organizational circular public procurement competency has a significant and positive effect on change management program (P Value < 0.01) and lastly organizational circular public procurement competency has a significant and positive effect on re-engineering program (P Value < 0.01). They are also mutually influential. It is therefore recommended that Procuring entities should initiate planning and monitoring, change management program and re-engineering process geared towards circular public procurement competency.
- ItemMODELLING OF SUITABLE AREAS FOR ESTABLISHING GRAZING RESERVES AND STOCK ROUTES IN ZURU EMIRATE, KEBBI STATE, NIGERIA(2024-09)Recent occurrences in Zuru Emirate have revealed that the struggle for common resources (land) is one of the factors that has resulted into violent conflicts in the area between Fulani herders and local crop farmers. With increasing urbanisation and land use and land cover changes, the identification of adequate and suitable grazing areas is becoming crucial to ensuring the survival of pastoral communities. This research used geospatial techniques and multicriteria decision analysis tools to model suitable areas for siting grazing reserves in Zuru Emirate, Kebbi State. The eleven criteria used to conduct the land suitability analysis for the grazing reserve in Zuru Emirate are land use, land cover, slope, temperature, precipitation, elevation, distance from water, distance from road, distance from settlement, soil organic carbon, soil pH, and soil depth. All the criteria were standardised and weighted using the Analytical Hierarchy Process AHP in order to produce a land suitability map for the grazing reserve. To assess the reliability of the land suitability map, zonal statistical analysis was used to calculate the mean Normalized Difference Vegetation Index NDVI value of each land suitability class. The results of the AHP weighted analysis of the criteria revealed that land use was the most influential criterion with a weight of 0.22 (22%), while soil depth and soil pH had the lowest weight of 0.04 (4%). The results of land suitability mapping for grazing reserves indicated that 0.92% of the study area is least suitable, 83.13% is moderately suitable, 16.48% is suitable, and only 0.46% of the study area is most suitable for siting grazing reserves. This may fit into determining the reliability of a suitability map for vegetation or crop areas. It is recommended that consistent monitoring and revisions of the land suitability map be conducted to allow decision-makers to make informed decisions about sustainable land use planning and management
- ItemAN APPRAISAL OF COLLABORATION REQUIREMENT FOR THE LAST PLANNER SYSTEM IMPLEMENTATION IN CONSTRUCTION PROJECTS(2025-05)The construction industry in Nigeria faces significant challenges related to project delays, cost overruns, and workflow inefficiencies. The Last Planner System (LPS), a lean construction management tool, has proven effective in improving planning reliability and reducing variability through enhanced collaboration among stakeholders. However, the successful implementation of LPS requires a structured, collaborative framework that is often underdeveloped in many Nigerian construction projects. This study examines the collaboration requirements essential for the successful application of LPS in Nigeria‘s construction industry. The study adopted a survey design approach for data collection whereby 140 questionnaires were distributed both online and offline and a total of 70 valid responses were retrieved, the data collected was analyzed using frequency distribution, mean scores, standard deviation and regression analysis. The results show that 83% of the participants agree that the requirements for LPS are achievable in construction projects while about 70%-83% of the respondents indicated that the requirements for team processes are averagely exhibited in construction projects. The research identifies key factors such as stakeholder’s communication, commitment planning, early involvement of subcontractors and regular coordination meetings as critical elements for effective LPS deployment. The Findings highlight the need for a cultural shift towards more integrated team-based planning processes and provide recommendations for fostering collaboration to improve project outcomes in Nigeria’s construction sector. Thus, to implement LPS in construction projects the team processes have to be highly exhibited or more than just averagely exhibited which will thereby lead to more adoption of LPS which will make the Nigerian construction industry to also benefit from its implementation. This research contributes to the growing body of knowledge on lean construction by providing insights into how LPS can be adapted to unique challenges of the Nigerian context.
- ItemEXPLORING PRINCIPLES OF ORGANIC ARCHITECTURE TO FACILITATE HEALING OF DRUG ADDICTS IN THE DESIGN OF REHABILITATION CENTRE, KADUNA(2023-01)Drug addiction is a serious menace to our society that has afflicted a large majority of youth in Kaduna State, Nigeria, and the world at large. Though not an active preventive measure, rehabilitation is an integral part of the fight against drug addiction. Unfortunately, the rehabilitation centres in Kaduna serve more as detention centres. This problem is beyond the practice of the process of rehabilitation, but it even extends to the buildings used to house and administer the necessary treatment of this menacing element of our society. This research reviewed relevant literature on the topic, which revealed that Architecture plays an important role in the healing of patients, a concept known as Healing Architecture. Healing Architecture is a subset of a larger and more established concept called Organic Architecture. Organic Architecture has principles that provide design elements that influence healing of Drug Addicts in a Rehabilitation Centre. These design elements such as Indoor Temperature, Humidity, Sound Intensity and more were analysed using a combination of qualitative and quantitative methods. The results of the analysis revealed that the buildings used for Drug Addict Rehabilitation in Kaduna lack the necessary design considerations that enhance the healing process. It was also established through various interviews that patients in the rehabilitation centres would prefer improvements in their buildings such as brighter coloured rooms, access to gardens and cool temperature in their interior spaces. This would be a reflection of the use of principles of Organic Architecture in the design of their facilities. This study posits that the Government and relevant authorities should consider factors that encourage the use of Healing Architecture in the design and construction of Drug Addict’s Rehabilitation Centres. The proposed rehabilitation centre demonstrates the design considerations that could facilitate the healing process of drug addict rehabilitation.
- ItemMODELLING OF SUITABLE AREAS FOR ESTABLISHING GRAZING RESERVES AND STOCK ROUTES IN ZURU EMIRATE, KEBBI STATE, NIGERIA(2024-11)Recent occurrences in Zuru Emirate have revealed that the struggle for common resources (land) is one of the factors that has resulted into violent conflicts in the area between Fulani herders and local crop farmers. With increasing urbanisation and land use and land cover changes, the identification of adequate and suitable grazing areas is becoming crucial to ensuring the survival of pastoral communities. This research used geospatial techniques and multicriteria decision analysis tools to model suitable areas for siting grazing reserves in Zuru Emirate, Kebbi State. The eleven criteria used to conduct the land suitability analysis for the grazing reserve in Zuru Emirate are land use, land cover, slope, temperature, precipitation, elevation, distance from water, distance from road, distance from settlement, soil organic carbon, soil pH, and soil depth. All the criteria were standardised and weighted using the Analytical Hierarchy Process AHP in order to produce a land suitability map for the grazing reserve. To assess the reliability of the land suitability map, zonal statistical analysis was used to calculate the mean Normalized Difference Vegetation Index NDVI value of each land suitability class. The results of the AHP weighted analysis of the criteria revealed that land use was the most influential criterion with a weight of 0.22 (22%), while soil depth and soil pH had the lowest weight of 0.04 (4%). The results of land suitability mapping for grazing reserves indicated that 0.92% of the study area is least suitable, 83.13% is moderately suitable, 16.48% is suitable, and only 0.46% of the study area is most suitable for siting grazing reserves. This may fit into determining the reliability of a suitability map for vegetation or crop areas. It is recommended that consistent monitoring and revisions of the land suitability map be conducted to allow decision-makers to make informed decisions about sustainable land use planning and management.