The demand for monitoring activities has been more evident recently in oil and gas“O&G”activities such as exploration,drilling,production,logistics,or shipping.Consequently,these offshore infrastructures require...The demand for monitoring activities has been more evident recently in oil and gas“O&G”activities such as exploration,drilling,production,logistics,or shipping.Consequently,these offshore infrastructures require asset management(or facilities management).This study seeks to understand the research pattern of publications within the domain of asset management in offshore infrastructures with the aim of determining the present state of the field’s research.The paper conducts a scientometric analysis of publications that focus on offshore infrastructures’asset management published between 1992 and 2022.The employed search query yielded a total of 346 journal articles from the Scopus database and 43 from the Web of Science(WoS)database,respectively.The data analysis of the scientometric investigation explored research authorship,co-occurrence of keywords,number of publications,network mapping,country geographical breakdown,and literature coupling.The paper shows rising interest in monitoring and asset management in the oil and gas industry.It was concluded that the management of these infrastructures requires frequent review with the application of sustainable asset management strategies.展开更多
This paper investigates</span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><...This paper investigates</span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">the impact of biohazards and pandemics on construction workers’ health and well-being. A proper selection of control methods for biohazards and pandemics like COVID-19 pandemic will result in improved public health conditions. Occupational risks in the construction industry are also examined, with a focus on biohazards and pandemics, their containment, and the implications for health and safety. A safer work environment in the construction industry is encouraged. In this study, some statistical methods were used to analyse the data obtained from sampled</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">questionnaire. According to the findings, fewer people in poor developing</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">countries get routine check-ups compared to developed countries. The</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">construction industries studied have little or no insurance plans for staff. It also demonstrates that personal protective equipment (PPE) such as nasal masks, helmets, hand gloves, and work aprons can assist in the control of biohazards in the construction sector, such as asthma, cancer, and asbestosis. There should be safety awareness programmes, conferences, and seminars, as well as first-aid kits and HSE and qualified health workers on all building sites. In addition, the government should examine the site for the usage of PPEs and verify that records of family/personal medical history are maintained.展开更多
The purpose of this work was to explore the influence law of vibration load on rock mass structure and slope stability.Based on the type and transmission way of vibration stress wave,the main stress in the horizontal ...The purpose of this work was to explore the influence law of vibration load on rock mass structure and slope stability.Based on the type and transmission way of vibration stress wave,the main stress in the horizontal and vertical directions was analyzed and the superposition effect of the stress wave was revealed.After the mechanical analysis of the sliding mass,the calculation formulas of the anti-sliding force and the sliding force were derived and the damage mechanism of blasting vibration to the structural plane was defined.In addition,according to the structure and lithologic parameter of the slope as well as the vibration monitoring data,the west slope stability of Xiaolongtan open pit mine was analyzed.The results show that the time-dependent stability factor is proportional to the vibration speed and the peak values appear at the same time.Vibration load promotes the breakage of the structural plane leading to the drop of the west slope stability factor by 0.23%.Under the multipoint simultaneous blasting,the fluctuating laws of the stability factors are consistent.The more the start-up points are,the higher the weakening degree to the slope stability is.Under the multipoint allochronic blasting,the stability factor depends on the synthetic waveform structure of all vibration waves.The greater the blasting time difference is,the lower the weakening degree to the slope stability is.Selecting the reasonable quantity of start-up points and time difference could fully reduce the adverse influence of vibration load to slope stability.展开更多
Nigeria today faces serious challenge in providing adequate energy to meet the needs of her citizenry. Efforts are currently geared towards generation of more energy to ease the problem. While these efforts are commen...Nigeria today faces serious challenge in providing adequate energy to meet the needs of her citizenry. Efforts are currently geared towards generation of more energy to ease the problem. While these efforts are commendable, it is equally desirable to explore ways to minimize consumption of generated energy. The objective of this work is to investigate the effect of building orientation on energy demand in buildings. This paper considered the use of standard design considerations, fundamental cooling load equations and the guidelines stipulated by the American Society of Heating, Cooling and Air conditioning Engineers (ASHRAE). The study takes the designs of three buildings within the University of Ibadan, Nigeria into consideration with the view to harness the energy saving potentials through building orientation and selection of efficient cooling equipment. The results obtained were 155.34, 224.75, 86.35 kW and 163.60, 232.04 and 90.64 kW for the three lecture envelopes including the Faculty of Science, CBN and the Department of Chemistry lecture theatres using the North-South and East-West building orientations respectively. Increase in energy demand of 7.96, 7.29 and 4.29 kW was thus obtained with the East-West building orientation over North-South. Energy efficiency is thus guaranteed with North-South building orientation.展开更多
Zoning policies are measures used to enforce compliance and control the development of an area.These measures have been used in different countries to achieve a well-planned and habitable residential environment.Enfor...Zoning policies are measures used to enforce compliance and control the development of an area.These measures have been used in different countries to achieve a well-planned and habitable residential environment.Enforcement of these measures has tended to increase or decrease property values in some jurisdictions.Thus,the objective of this study was to measure the influence of zoning policies on rental values in Abuja,Nigeria.Due to the dearth of data related to the subject matter of this research,residents,property developers and personnel responsible for enforcement of these policies were targeted and used for data gathering.The hedonic price modeling(HPM)was used to assess the contribution of zoning policies to rental values in this analysis.The results,however,revealed that zoning is negatively correlated to rental values,while other zoning policies used in the study area are positively correlated to rental values.The result extends the debate that the impact of zoning could either be positively or negatively correlated to price relative to the underlying measures adopted within a jurisdiction.This result suggests that it is imperative to undertake a study in a jurisdiction before decisions could be made.Again,zoning policies should be extended to other suburbs of Abuja so that population pressure within Abuja and its immediate suburbs could be mitigated.展开更多
Land-use policies and regulations are employed all over the world to control land usage.Relative to the type of regulations,these can have several impacts on the value of properties.However,the value of properties mig...Land-use policies and regulations are employed all over the world to control land usage.Relative to the type of regulations,these can have several impacts on the value of properties.However,the value of properties might increase or decrease depending on the type of measures that are yearly employed.Thus the objective of this study was to assess the implication of land use regulations on rental value trend in Abuja,Nigeria.The survey design was used to elicit relevant information from occupiers and Estate Surveying and Valuation firms in Abuja.Results were presented on tables,and an annual growth rate factor was used to assess the relative growth of rent within the three locations(Wuse,Maitama and Nyanya),studied.Results indicate a significant rise in the rental value of properties between 2008 and 2017.Thus,the planning authorities in Abuja should reconsider the kind of policies they implement within the study area to avoid abuse and unnecessary restrictions that affect the state of the environment and value.展开更多
The purpose of this study is to explore the need to adopt the CAMA （computer assisted mass appraisal） based system into the Nigerian property market with an example data from Nasarawa in Nasarawa State. Using the ...The purpose of this study is to explore the need to adopt the CAMA （computer assisted mass appraisal） based system into the Nigerian property market with an example data from Nasarawa in Nasarawa State. Using the hedonic regression models on 312 samples, the results reveal the linear form to outperform the semi-log specification. This demonstration shows that CAMA system can be introduced into the local market of Nasarawa and indeed the whole of Nigeria for property taxes.展开更多
This paper examines land policies on acquisition and compensation practice in Nigeria with the aim of minimizing conflicts in land acquisition and compensation.It further explains the implications of uncoordinated lan...This paper examines land policies on acquisition and compensation practice in Nigeria with the aim of minimizing conflicts in land acquisition and compensation.It further explains the implications of uncoordinated land allocations arising from informal transactions.The paper used self-administered questionnaires on all the fifteen(15)registered estate firms in the 2009 NIESV Directory in Benin City,Edo state to obtain information that helped to determine the fairness of compensation practice and causes of conflict in some communities in the state.The paper revealed that the compensation on acquired landed properties in Nigeria violated the principles of good governance as against what is obtainable in advanced countries.It also observed that inadequacy of compensation paid and delay in payment are the causes of conflict between the acquiring authorities and the affected community/people.The paper concluded that a review of land policies on acquisition and compensation will be a panacea for achieving the principles of good governance.展开更多
With the increasing exploration of oil and gas into deep waters,the necessity for material development increases for lighter conduits such as composite marine risers,in the oil and gas industry.To understand the resea...With the increasing exploration of oil and gas into deep waters,the necessity for material development increases for lighter conduits such as composite marine risers,in the oil and gas industry.To understand the research knowledge on this novel area,there is a need to have a bibliometric analysis on composite marine risers.A research methodology was developed whereby the data retrieval was from SCOPUS database from 1977–2023.Then,VOSviewer was used to visualize the knowledge maps.This study focuses on the progress made by conducting knowledge mapping and scientometric review on composite marine risers.This scientometric analysis on the subject shows current advances,geographical activities by countries,authorship records,collaborations,funders,affiiliations,co‑occurrences,and future research areas.It was observed that the research trends recorded the highest publication volume in the U.S.A.,but less cluster affiiliated,as it was followed by countries like the U.K.,China,Nigeria,Australia and Singapore.Also,thisfiield has more conference papers than journal papers due to the challenge of adaptability,acceptance,qualifiication,and application of composite marine risers in the marine industry.Hence,there is a need for more collaborations on composite marine risers and more funding to enhance the research trend.展开更多
Urban growth is a continuous spatial expansion, and happens as a spatial-temporal process. This physical process influenced by various driving factors on the sub-systems within the main urban system. Analysing this sp...Urban growth is a continuous spatial expansion, and happens as a spatial-temporal process. This physical process influenced by various driving factors on the sub-systems within the main urban system. Analysing this spatial-temporal process and the influencing factors behind it is a substantial and essential task as it facilitates the local planning process. Previous studies were concerned with the individual effect of each driver on the main urban system rather than with the interactions between the drivers in the different sub-systems. This research aims to model urban growth and to consider the effect of the driving factors separately on the socio-economic, physical and environmental sub-systems. GIS based logistic regression modelling is used to model the fringe growth to find out the relationship between urban growth and its driving factors. These findings highlighted the positive and negative influencing factors in terms of, “where the growth should go?” and “how much of it should go?”. The factors in the socio-economic, physical, and environmental sub-systems can exert their influence in a positive or negative manner. The cumulative results of the various influences caused a unique pattern of growth in the Colombo urban fringe that is quite distinct from the pattern witnessed in other Asian countries.展开更多
基金The School of Engineering,Lancaster University,UK and the Engineering and Physical Sciences Research Council(EPSRC)’s Doctoral Training Centre(DTC),UK are highly appreciatedMoreso,the Foreign Postgraduate Scholarship of Niger Delta Development Commission(NDDC)Nigeria are also valued for financial support as well as the BOLD25 Initiative of Universiti Tenaga Nasional(UNITEN),Malaysia.
文摘The demand for monitoring activities has been more evident recently in oil and gas“O&G”activities such as exploration,drilling,production,logistics,or shipping.Consequently,these offshore infrastructures require asset management(or facilities management).This study seeks to understand the research pattern of publications within the domain of asset management in offshore infrastructures with the aim of determining the present state of the field’s research.The paper conducts a scientometric analysis of publications that focus on offshore infrastructures’asset management published between 1992 and 2022.The employed search query yielded a total of 346 journal articles from the Scopus database and 43 from the Web of Science(WoS)database,respectively.The data analysis of the scientometric investigation explored research authorship,co-occurrence of keywords,number of publications,network mapping,country geographical breakdown,and literature coupling.The paper shows rising interest in monitoring and asset management in the oil and gas industry.It was concluded that the management of these infrastructures requires frequent review with the application of sustainable asset management strategies.
文摘This paper investigates</span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">the impact of biohazards and pandemics on construction workers’ health and well-being. A proper selection of control methods for biohazards and pandemics like COVID-19 pandemic will result in improved public health conditions. Occupational risks in the construction industry are also examined, with a focus on biohazards and pandemics, their containment, and the implications for health and safety. A safer work environment in the construction industry is encouraged. In this study, some statistical methods were used to analyse the data obtained from sampled</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">questionnaire. According to the findings, fewer people in poor developing</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">countries get routine check-ups compared to developed countries. The</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">construction industries studied have little or no insurance plans for staff. It also demonstrates that personal protective equipment (PPE) such as nasal masks, helmets, hand gloves, and work aprons can assist in the control of biohazards in the construction sector, such as asthma, cancer, and asbestosis. There should be safety awareness programmes, conferences, and seminars, as well as first-aid kits and HSE and qualified health workers on all building sites. In addition, the government should examine the site for the usage of PPEs and verify that records of family/personal medical history are maintained.
基金Project(2015M580491)supported by the China Postdoctoral Science FoundationProject(51404262)supported by the National Natural Science Foundation of China+1 种基金Project(2014XT01)supported by the Research Funds for the Central Universities,ChinaProject supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions,China
文摘The purpose of this work was to explore the influence law of vibration load on rock mass structure and slope stability.Based on the type and transmission way of vibration stress wave,the main stress in the horizontal and vertical directions was analyzed and the superposition effect of the stress wave was revealed.After the mechanical analysis of the sliding mass,the calculation formulas of the anti-sliding force and the sliding force were derived and the damage mechanism of blasting vibration to the structural plane was defined.In addition,according to the structure and lithologic parameter of the slope as well as the vibration monitoring data,the west slope stability of Xiaolongtan open pit mine was analyzed.The results show that the time-dependent stability factor is proportional to the vibration speed and the peak values appear at the same time.Vibration load promotes the breakage of the structural plane leading to the drop of the west slope stability factor by 0.23%.Under the multipoint simultaneous blasting,the fluctuating laws of the stability factors are consistent.The more the start-up points are,the higher the weakening degree to the slope stability is.Under the multipoint allochronic blasting,the stability factor depends on the synthetic waveform structure of all vibration waves.The greater the blasting time difference is,the lower the weakening degree to the slope stability is.Selecting the reasonable quantity of start-up points and time difference could fully reduce the adverse influence of vibration load to slope stability.
文摘Nigeria today faces serious challenge in providing adequate energy to meet the needs of her citizenry. Efforts are currently geared towards generation of more energy to ease the problem. While these efforts are commendable, it is equally desirable to explore ways to minimize consumption of generated energy. The objective of this work is to investigate the effect of building orientation on energy demand in buildings. This paper considered the use of standard design considerations, fundamental cooling load equations and the guidelines stipulated by the American Society of Heating, Cooling and Air conditioning Engineers (ASHRAE). The study takes the designs of three buildings within the University of Ibadan, Nigeria into consideration with the view to harness the energy saving potentials through building orientation and selection of efficient cooling equipment. The results obtained were 155.34, 224.75, 86.35 kW and 163.60, 232.04 and 90.64 kW for the three lecture envelopes including the Faculty of Science, CBN and the Department of Chemistry lecture theatres using the North-South and East-West building orientations respectively. Increase in energy demand of 7.96, 7.29 and 4.29 kW was thus obtained with the East-West building orientation over North-South. Energy efficiency is thus guaranteed with North-South building orientation.
文摘Zoning policies are measures used to enforce compliance and control the development of an area.These measures have been used in different countries to achieve a well-planned and habitable residential environment.Enforcement of these measures has tended to increase or decrease property values in some jurisdictions.Thus,the objective of this study was to measure the influence of zoning policies on rental values in Abuja,Nigeria.Due to the dearth of data related to the subject matter of this research,residents,property developers and personnel responsible for enforcement of these policies were targeted and used for data gathering.The hedonic price modeling(HPM)was used to assess the contribution of zoning policies to rental values in this analysis.The results,however,revealed that zoning is negatively correlated to rental values,while other zoning policies used in the study area are positively correlated to rental values.The result extends the debate that the impact of zoning could either be positively or negatively correlated to price relative to the underlying measures adopted within a jurisdiction.This result suggests that it is imperative to undertake a study in a jurisdiction before decisions could be made.Again,zoning policies should be extended to other suburbs of Abuja so that population pressure within Abuja and its immediate suburbs could be mitigated.
文摘Land-use policies and regulations are employed all over the world to control land usage.Relative to the type of regulations,these can have several impacts on the value of properties.However,the value of properties might increase or decrease depending on the type of measures that are yearly employed.Thus the objective of this study was to assess the implication of land use regulations on rental value trend in Abuja,Nigeria.The survey design was used to elicit relevant information from occupiers and Estate Surveying and Valuation firms in Abuja.Results were presented on tables,and an annual growth rate factor was used to assess the relative growth of rent within the three locations(Wuse,Maitama and Nyanya),studied.Results indicate a significant rise in the rental value of properties between 2008 and 2017.Thus,the planning authorities in Abuja should reconsider the kind of policies they implement within the study area to avoid abuse and unnecessary restrictions that affect the state of the environment and value.
文摘The purpose of this study is to explore the need to adopt the CAMA （computer assisted mass appraisal） based system into the Nigerian property market with an example data from Nasarawa in Nasarawa State. Using the hedonic regression models on 312 samples, the results reveal the linear form to outperform the semi-log specification. This demonstration shows that CAMA system can be introduced into the local market of Nasarawa and indeed the whole of Nigeria for property taxes.
文摘This paper examines land policies on acquisition and compensation practice in Nigeria with the aim of minimizing conflicts in land acquisition and compensation.It further explains the implications of uncoordinated land allocations arising from informal transactions.The paper used self-administered questionnaires on all the fifteen(15)registered estate firms in the 2009 NIESV Directory in Benin City,Edo state to obtain information that helped to determine the fairness of compensation practice and causes of conflict in some communities in the state.The paper revealed that the compensation on acquired landed properties in Nigeria violated the principles of good governance as against what is obtainable in advanced countries.It also observed that inadequacy of compensation paid and delay in payment are the causes of conflict between the acquiring authorities and the affected community/people.The paper concluded that a review of land policies on acquisition and compensation will be a panacea for achieving the principles of good governance.
基金support of the School of Engineering,Lancaster University,UK,for the Engineering Department Studentship as well as the Engineering and Physical Sciences Research Council(EPSRC)’s Doctoral Training Centre(DTC)。
文摘With the increasing exploration of oil and gas into deep waters,the necessity for material development increases for lighter conduits such as composite marine risers,in the oil and gas industry.To understand the research knowledge on this novel area,there is a need to have a bibliometric analysis on composite marine risers.A research methodology was developed whereby the data retrieval was from SCOPUS database from 1977–2023.Then,VOSviewer was used to visualize the knowledge maps.This study focuses on the progress made by conducting knowledge mapping and scientometric review on composite marine risers.This scientometric analysis on the subject shows current advances,geographical activities by countries,authorship records,collaborations,funders,affiiliations,co‑occurrences,and future research areas.It was observed that the research trends recorded the highest publication volume in the U.S.A.,but less cluster affiiliated,as it was followed by countries like the U.K.,China,Nigeria,Australia and Singapore.Also,thisfiield has more conference papers than journal papers due to the challenge of adaptability,acceptance,qualifiication,and application of composite marine risers in the marine industry.Hence,there is a need for more collaborations on composite marine risers and more funding to enhance the research trend.
文摘Urban growth is a continuous spatial expansion, and happens as a spatial-temporal process. This physical process influenced by various driving factors on the sub-systems within the main urban system. Analysing this spatial-temporal process and the influencing factors behind it is a substantial and essential task as it facilitates the local planning process. Previous studies were concerned with the individual effect of each driver on the main urban system rather than with the interactions between the drivers in the different sub-systems. This research aims to model urban growth and to consider the effect of the driving factors separately on the socio-economic, physical and environmental sub-systems. GIS based logistic regression modelling is used to model the fringe growth to find out the relationship between urban growth and its driving factors. These findings highlighted the positive and negative influencing factors in terms of, “where the growth should go?” and “how much of it should go?”. The factors in the socio-economic, physical, and environmental sub-systems can exert their influence in a positive or negative manner. The cumulative results of the various influences caused a unique pattern of growth in the Colombo urban fringe that is quite distinct from the pattern witnessed in other Asian countries.
