Pub Date : 2020-01-01DOI: 10.37421/JCDE.2020.10.362
N. M. Nde, D. Fokwa, M. Mbessa, T. Tamo, C. Pettang
The sometimes extreme hydro-climatic stresses that buildings undergo can lead to significant deterioration which can lead to their collapse. The concern to realize durable works and ensuring a comfortable framework for the life of the occupants leads to seek effective solutions, as well for the new construction as for the renovation of old construction, answering the sempiternal problem of harmful action of water on buildings materials. This paper proposes a numerical simulation of moisture migration in concrete building walls, the aim being to highlight the influence of pore size on the kinetics of moisture migration, and its gradient in the wall. A mathematical model taking into account the mechanisms of moisture migration due to liquid moisture gradient and by vapor diffusion is proposed; the discrete formulation of the equation by the numerical scheme of Crank Nicolson is then carried out, and results from computer modeling using Matlab software version 7.10.0.499 (R2010a), show that pore size is a key parameter that influences the dynamics of moisture migration in the wall. Indeed, this parameter qualitatively and quantitatively influences the kinetics of moisture migration, as well as it gradient in the concrete wall.
{"title":"Numerical Simulation of Influence of Pores Sizes on Water Migration Dynamic in Concrete Building Walls","authors":"N. M. Nde, D. Fokwa, M. Mbessa, T. Tamo, C. Pettang","doi":"10.37421/JCDE.2020.10.362","DOIUrl":"https://doi.org/10.37421/JCDE.2020.10.362","url":null,"abstract":"The sometimes extreme hydro-climatic stresses that buildings undergo can lead to significant deterioration which can lead to their collapse. The concern to realize durable works and ensuring a comfortable framework for the life of the occupants leads to seek effective solutions, as well for the new construction as for the renovation of old construction, answering the sempiternal problem of harmful action of water on buildings materials. This paper proposes a numerical simulation of moisture migration in concrete building walls, the aim being to highlight the influence of pore size on the kinetics of moisture migration, and its gradient in the wall. A mathematical model taking into account the mechanisms of moisture migration due to liquid moisture gradient and by vapor diffusion is proposed; the discrete formulation of the equation by the numerical scheme of Crank Nicolson is then carried out, and results from computer modeling using Matlab software version 7.10.0.499 (R2010a), show that pore size is a key parameter that influences the dynamics of moisture migration in the wall. Indeed, this parameter qualitatively and quantitatively influences the kinetics of moisture migration, as well as it gradient in the concrete wall.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88782787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/JCDE.2020.10.341
James Mushori, C. Rambo, C. Wafula
The quality of road infrastructure is dependent on many factors including materials used and contractor competency in terms of managing the project and the team. Poor workmanship has been mostly blamed on these factors. Kenya and Africa at large has realized the road to grow economy is through infrastructural development projects hence investing billions of money into this noble course. Although many studies have been conducted on road construction, the focus is always drawn on the implementation phase thereby forgetting the post-delivery phase. The study aimed to assess the moderating influence of process monitoring on the relationship between contractors’ capacity evaluation in tender award and performance of road construction infrastructural project in the context of Nairobi county, Kenya. The study used both a cross-sectional descriptive survey research design and correlation research design. A sample size of 210 was obtained from a target population of 460 comprising of 106 contractors and 104 Public Service Vehicles (PSVs) drivers. Stratified sampling and proportionate sampling were used to arrive at the right sample size. Simple random sampling helped in distribution of research instruments. Pilot test was done to ensure validity and reliability of research instruments is achieved. Validity of instruments was done by use of content validity to ensure research questions aided in achieving research objective. To maintain reliability of data, Cronbach alpha values of above 0.7 were deemed important. Questionnaires were administered to contractors registered by National Construction Authority of Kenya whereas structured interview schedules were distributed to the drivers in Nairobi County. In total, 153(72.8%) of response rate was recorded. Quantitative data was descriptively analyzed whereby measure of central tendency and dispersion was done through means and standard deviation. Karl Pearson Correlation Coefficient was used to show relationship between variables under the study. Hypothesis was tested by use of Analysis of Variance (ANOVA) whereby multiple regression and hierarchical analysis were conducted to explain the direction, the strength and the nature of relationship between the study variables. The results showed that in both step one and two, F-values were statistically significant. That in step one R=0.826, adjusted R2=0.673, F(4,148)=79.226, p=0.000<0.05 and in step two: R=0.837, adjusted R2=0.690, F(5,147)=68.520, p=0.000<0.05. This implies that contractors’ capacity evaluation in tender award alone explains 67.3% of variation in road performance. However when put together with process monitoring they explain 69.0% of total variation in road performance. Thus the null hypothesis was rejected and alternate hypothesis accepted that process monitoring significantly moderates the relationship between combined factors of contractors’ capacity evaluation in tender award and performance of road construction infrastructural projects. Th
{"title":"Moderating Influence of Process Monitoring on the Relationship between Contractors Capacity Evaluation in Tender Award and Performance of Road Construction Infrastructural Projects","authors":"James Mushori, C. Rambo, C. Wafula","doi":"10.37421/JCDE.2020.10.341","DOIUrl":"https://doi.org/10.37421/JCDE.2020.10.341","url":null,"abstract":"The quality of road infrastructure is dependent on many factors including materials used and contractor competency in terms of managing the project and the team. Poor workmanship has been mostly blamed on these factors. Kenya and Africa at large has realized the road to grow economy is through infrastructural development projects hence investing billions of money into this noble course. Although many studies have been conducted on road construction, the focus is always drawn on the implementation phase thereby forgetting the post-delivery phase. The study aimed to assess the moderating influence of process monitoring on the relationship between contractors’ capacity evaluation in tender award and performance of road construction infrastructural project in the context of Nairobi county, Kenya. The study used both a cross-sectional descriptive survey research design and correlation research design. A sample size of 210 was obtained from a target population of 460 comprising of 106 contractors and 104 Public Service Vehicles (PSVs) drivers. Stratified sampling and proportionate sampling were used to arrive at the right sample size. Simple random sampling helped in distribution of research instruments. Pilot test was done to ensure validity and reliability of research instruments is achieved. Validity of instruments was done by use of content validity to ensure research questions aided in achieving research objective. To maintain reliability of data, Cronbach alpha values of above 0.7 were deemed important. Questionnaires were administered to contractors registered by National Construction Authority of Kenya whereas structured interview schedules were distributed to the drivers in Nairobi County. In total, 153(72.8%) of response rate was recorded. Quantitative data was descriptively analyzed whereby measure of central tendency and dispersion was done through means and standard deviation. Karl Pearson Correlation Coefficient was used to show relationship between variables under the study. Hypothesis was tested by use of Analysis of Variance (ANOVA) whereby multiple regression and hierarchical analysis were conducted to explain the direction, the strength and the nature of relationship between the study variables. The results showed that in both step one and two, F-values were statistically significant. That in step one R=0.826, adjusted R2=0.673, F(4,148)=79.226, p=0.000<0.05 and in step two: R=0.837, adjusted R2=0.690, F(5,147)=68.520, p=0.000<0.05. This implies that contractors’ capacity evaluation in tender award alone explains 67.3% of variation in road performance. However when put together with process monitoring they explain 69.0% of total variation in road performance. Thus the null hypothesis was rejected and alternate hypothesis accepted that process monitoring significantly moderates the relationship between combined factors of contractors’ capacity evaluation in tender award and performance of road construction infrastructural projects. Th","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84597002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/jcde.2020.10.349
A. Ro, A. Hi, Anyasi Raymond Jo
Greenhouse assessment of the effect of oil on Chromolaena odorata ability to remove PCB from soil treated with transformer oil co-contaminated with Aroclor 1260 was done. Method: Plants were transplanted into one kilogram of soil contained in 1L pots differently containing 100, 200, and 500 ml of transformer oil (T/O), co-contaminated with 100 ppm of Aroclor. Treatments were done in two microcosms; direct contamination and soil cultured method. Measured plant growth parameters showed that C. odorata growth was affected by the different concentrations of oil. Inhibition of plant growth by oil increased with concentrations. Results: At the end of six weeks, plant growth was affected in T/O amended soil. Plants size was increased by 1.4, 0.46 and -1.0% in direct treatment and 17.01, 6.09 and 1.08% in soil culture at the 100, 200 and 500 ppm respectively. Untreated control showed a 43.07% increase. Slight PCB recovery was observed in root tissues of C. odorata but soil PCB was reduced by 66.6%, 53.2%, 41.5% and 77.3%, 74.7%, 58.8% at both treatments in their respective concentrations of oil. However, unplanted control was reduced by 21.4% and 16.7% in the two treatments at 100 ppm of oil. Conclusion: This study has shown that with improved agronomic practices, there is a possibility of phytoremediation of soil PCB from PCB contained transformer oil contaminated soil using Chromolaena odorata, hence it should be optimized in the field.
{"title":"Effect of Oil on Phytoremediation of PCB Co-Contamination in Transformer Oil Using Chromolaena odorata","authors":"A. Ro, A. Hi, Anyasi Raymond Jo","doi":"10.37421/jcde.2020.10.349","DOIUrl":"https://doi.org/10.37421/jcde.2020.10.349","url":null,"abstract":"Greenhouse assessment of the effect of oil on Chromolaena odorata ability to remove PCB from soil treated with transformer oil co-contaminated with Aroclor 1260 was done. Method: Plants were transplanted into one kilogram of soil contained in 1L pots differently containing 100, 200, and 500 ml of transformer oil (T/O), co-contaminated with 100 ppm of Aroclor. Treatments were done in two microcosms; direct contamination and soil cultured method. Measured plant growth parameters showed that C. odorata growth was affected by the different concentrations of oil. Inhibition of plant growth by oil increased with concentrations. Results: At the end of six weeks, plant growth was affected in T/O amended soil. Plants size was increased by 1.4, 0.46 and -1.0% in direct treatment and 17.01, 6.09 and 1.08% in soil culture at the 100, 200 and 500 ppm respectively. Untreated control showed a 43.07% increase. Slight PCB recovery was observed in root tissues of C. odorata but soil PCB was reduced by 66.6%, 53.2%, 41.5% and 77.3%, 74.7%, 58.8% at both treatments in their respective concentrations of oil. However, unplanted control was reduced by 21.4% and 16.7% in the two treatments at 100 ppm of oil. Conclusion: This study has shown that with improved agronomic practices, there is a possibility of phytoremediation of soil PCB from PCB contained transformer oil contaminated soil using Chromolaena odorata, hence it should be optimized in the field.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86917684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/jcde.2020.10.348
Nadine Al-Bqour
The City of Salt As the sixth Jordanian site in the list of World Heritage sites, there is many efforts have been devoted to include the city of Salt in the Hashemite Kingdom of Jordan to be nominated in the list of World Heritage Sites as it is an ancient city that has many historical, urban and archaeological qualifications in the distant and recent past, also with considering the natural qualifications of the city. The inclusion of the city of Salt in the list of World Heritage sites raises many questions about the possibility of achieving this achievement, and the implications of the local community based on this inclusion, whether the positive or negative effects in aspects of Economic, social, behavioral, political. Also considering the community and tourists vision of the state of the world heritage site in the city and its support to this status, and highlighting the role played by Salt in the development of tourism in the case if it takes a place in the World Heritage List, this paper will be examined through several previous studies in this framework, and will develop expected results for these impacts on the local community accordingly.
{"title":"The Impact of World Heritage Site Designation on Local Communities- The Al-Salt City as a Predicted Case Study","authors":"Nadine Al-Bqour","doi":"10.37421/jcde.2020.10.348","DOIUrl":"https://doi.org/10.37421/jcde.2020.10.348","url":null,"abstract":"The City of Salt As the sixth Jordanian site in the list of World Heritage sites, there is many efforts have been devoted to include the city of Salt in the Hashemite Kingdom of Jordan to be nominated in the list of World Heritage Sites as it is an ancient city that has many historical, urban and archaeological qualifications in the distant and recent past, also with considering the natural qualifications of the city. The inclusion of the city of Salt in the list of World Heritage sites raises many questions about the possibility of achieving this achievement, and the implications of the local community based on this inclusion, whether the positive or negative effects in aspects of Economic, social, behavioral, political. Also considering the community and tourists vision of the state of the world heritage site in the city and its support to this status, and highlighting the role played by Salt in the development of tourism in the case if it takes a place in the World Heritage List, this paper will be examined through several previous studies in this framework, and will develop expected results for these impacts on the local community accordingly.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87532209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/jcde.2020.10.343
A. Toure, Nick AuYeung, F. Sambe, Jackson Scoot Malace, Fuqiong Lei
The manufacturing of cement consumes energy and results carbon dioxide emissions. This work focused on producing cement clinker using coal fly ash (CFA), sewage sludge ash (SSA) and an industrial waste with a high content of calcium silicate (CS). Experiments were conducted to assume the use of a process that may consume less energy and raw materials that used in cement clinker manufacturing. The raw mixtures were prepared with lower clay and limestone contents than those used in Portland clinker manufacturing and then burned at lower temperatures, ranged from 1000 to 1200 °C. Due to the content of fluxes and mineralizers of the raw mixtures, this method could decrease carbon dioxide emissions from calcination up to 60% and energy consumption up to 350 kcal/kg of clinker. The free lime content of the clinker was found out by volumetric analysis and was consistent with free lime content in Portland cement clinker. Activation energies ranged from 42.7 to 91.1 kJ/mol and the cement clinkers contents of fluorine varied from 0.82 to 3.9%. The main characterizations of the obtained clinker, which were X-ray fluorescence, X-ray diffraction and SEM, highlighted interesting composition as building material.
{"title":"Cement Clinker based on industrial waste materials","authors":"A. Toure, Nick AuYeung, F. Sambe, Jackson Scoot Malace, Fuqiong Lei","doi":"10.37421/jcde.2020.10.343","DOIUrl":"https://doi.org/10.37421/jcde.2020.10.343","url":null,"abstract":"The manufacturing of cement consumes energy and results carbon dioxide emissions. This work focused on producing cement clinker using coal fly ash (CFA), sewage sludge ash (SSA) and an industrial waste with a high content of calcium silicate (CS). Experiments were conducted to assume the use of a process that may consume less energy and raw materials that used in cement clinker manufacturing. The raw mixtures were prepared with lower clay and limestone contents than those used in Portland clinker manufacturing and then burned at lower temperatures, ranged from 1000 to 1200 °C. Due to the content of fluxes and mineralizers of the raw mixtures, this method could decrease carbon dioxide emissions from calcination up to 60% and energy consumption up to 350 kcal/kg of clinker. The free lime content of the clinker was found out by volumetric analysis and was consistent with free lime content in Portland cement clinker. Activation energies ranged from 42.7 to 91.1 kJ/mol and the cement clinkers contents of fluorine varied from 0.82 to 3.9%. The main characterizations of the obtained clinker, which were X-ray fluorescence, X-ray diffraction and SEM, highlighted interesting composition as building material.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87668916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/jcde.2020.10.347
Damaris Kerubo Oyaro, Z. Oonge, P. Odira
Agriculture is one of the main economic activities for Kenyans; the wastes from agriculture are minimally used. Among the crops grown in Kenya is the banana and produces about one million tonnes of bananas yearly, mostly for local consumption, of which the banana herb produces the fruits once in a lifetime, thus the stem becomes waste afterward. The waste from the banana plant includes leaves, stems, peduncles, peels, and rejected fruits. The banana waste is organic and thus is suitable for anaerobic digestion in which the solid digestate has suitable nutrients to be used as fertilizer. Batch fermentation at the mesophilic temperature range was carried out in triple determinations, this also applied to the blank sample. After the batch test was complete, the pH of the fermentation residue was measured electrochemically using a pH meter. The COD of the residue (both Solid and liquid) was also determined. Analysis of the biogas produced by gas chromatography enabled the methane part of the gas to be calculated.
{"title":"Anaerobic Digestion of Banana Wastes for Biogas Production","authors":"Damaris Kerubo Oyaro, Z. Oonge, P. Odira","doi":"10.37421/jcde.2020.10.347","DOIUrl":"https://doi.org/10.37421/jcde.2020.10.347","url":null,"abstract":"Agriculture is one of the main economic activities for Kenyans; the wastes from agriculture are minimally used. Among the crops grown in Kenya is the banana and produces about one million tonnes of bananas yearly, mostly for local consumption, of which the banana herb produces the fruits once in a lifetime, thus the stem becomes waste afterward. The waste from the banana plant includes leaves, stems, peduncles, peels, and rejected fruits. The banana waste is organic and thus is suitable for anaerobic digestion in which the solid digestate has suitable nutrients to be used as fertilizer. Batch fermentation at the mesophilic temperature range was carried out in triple determinations, this also applied to the blank sample. After the batch test was complete, the pH of the fermentation residue was measured electrochemically using a pH meter. The COD of the residue (both Solid and liquid) was also determined. Analysis of the biogas produced by gas chromatography enabled the methane part of the gas to be calculated.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88783242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/JCCE.2020.10.355
M. Alsheyab
{"title":"Editorial Note for Journal of Civil and Environmental Engineering","authors":"M. Alsheyab","doi":"10.37421/JCCE.2020.10.355","DOIUrl":"https://doi.org/10.37421/JCCE.2020.10.355","url":null,"abstract":"","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88796542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/JCDE.2020.10.367
J. Ahmad, Aneel Manan, Asif Ali, M. TalhaIhsan, Osama Zaid, R. Ullah
It has been recommended that; the disposal of industrial waste would be greatly reduced if it could be incorporated in concrete production. One of these possibilities is the substitution of the fine aggregate by marble waste (MW), which contributes to the reduction of natural resources consumption, while solving a waste management problem. The basic objective of this investigation is to examine the characteristics of concrete using MW as fine aggregate in proportions 0%, 20%, 40%, 60%, 80% and 100% by weight of cement. Several fresh and harden properties have been reviewed in the current paper. The results observed from the various tests depict that increase the slump value with the increase the percentage level of MW. Moreover, strength was increase up to 60% substitution of MW and then decreases gradually. Therefore, it is recommended to MW as fine aggregate up to 60% substitution.
{"title":"Effects of Partially and Totally Substitution of Marble Waste as a Fine Aggregate on Workability and Mechanical Performance of Concrete","authors":"J. Ahmad, Aneel Manan, Asif Ali, M. TalhaIhsan, Osama Zaid, R. Ullah","doi":"10.37421/JCDE.2020.10.367","DOIUrl":"https://doi.org/10.37421/JCDE.2020.10.367","url":null,"abstract":"It has been recommended that; the disposal of industrial waste would be greatly reduced if it could be incorporated in concrete production. One of these possibilities is the substitution of the fine aggregate by marble waste (MW), which contributes to the reduction of natural resources consumption, while solving a waste management problem. The basic objective of this investigation is to examine the characteristics of concrete using MW as fine aggregate in proportions 0%, 20%, 40%, 60%, 80% and 100% by weight of cement. Several fresh and harden properties have been reviewed in the current paper. The results observed from the various tests depict that increase the slump value with the increase the percentage level of MW. Moreover, strength was increase up to 60% substitution of MW and then decreases gradually. Therefore, it is recommended to MW as fine aggregate up to 60% substitution.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78541444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/JCDE.2020.10.369
Mohammad Alkhatib, Parastoo Pourvahidi
Corona virus has changed the way of life and generally effects the expectations of employees in what they expect from office environments while they are returning to the physical office. Since, their time in the office is limited after the pandemic and most of the workers should be in office on rotation, therefore worker in the partial of time should have maximum productivity. One of the major determinants of employee productivity is the indoor physical environment. Today, organizations can improve their outcomes significantly when adequate attention is paid to promote the indoor workplace environment. This research aims to examine the effect of the workplace environment on the productivity of employees working in the ARAB bank in Jordan. Primary data was used in a form of self-reporting questionnaires distributed to 382 employees of ARAB bank in Jordan, 322 were analyzed using the version 26 of SPSS software. Outcomes of the research reveal that the indoor environment has a compelling impact on the employees' self-assessed productivity. The research is carried out during the Corona virus pandemic hence it is shared that most employees were working from home during the data collection phase.
{"title":"Impact of Indoor Physical Environment on Employee Productivity after Pandemic Period the Case of Arab Bank Jordan","authors":"Mohammad Alkhatib, Parastoo Pourvahidi","doi":"10.37421/JCDE.2020.10.369","DOIUrl":"https://doi.org/10.37421/JCDE.2020.10.369","url":null,"abstract":"Corona virus has changed the way of life and generally effects the expectations of employees in what they expect from office environments while they are returning to the physical office. Since, their time in the office is limited after the pandemic and most of the workers should be in office on rotation, therefore worker in the partial of time should have maximum productivity. One of the major determinants of employee productivity is the indoor physical environment. Today, organizations can improve their outcomes significantly when adequate attention is paid to promote the indoor workplace environment. This research aims to examine the effect of the workplace environment on the productivity of employees working in the ARAB bank in Jordan. Primary data was used in a form of self-reporting questionnaires distributed to 382 employees of ARAB bank in Jordan, 322 were analyzed using the version 26 of SPSS software. Outcomes of the research reveal that the indoor environment has a compelling impact on the employees' self-assessed productivity. The research is carried out during the Corona virus pandemic hence it is shared that most employees were working from home during the data collection phase.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85300565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/JCDE.2020.10.365
Arifin Islam, T. Adnan
Bicycle highways are specially designed infrastructures allowing cyclists to travel at a considerable speed through different environments. These elements in densely built urban areas are difficult to understand, since many requirements and standards need to be met. Serving all modes of traffic with acceptable efficiency and implementing a bicycle highway design is a challenge and therefore the aim of this study is to define a strategy for bicycle road traffic control in an urban area, the city center of Munich, which will improve its traffic efficiency. The current situation of the studied area was developed in PTV VISSIM to achieve the objective. Firstly, the base model was calibrated and validated to match the present state and synchronized separately for bicycles and cars. Five alternative models were developed based on coordinating and developing the bicycle highway infrastructure. Attempts were made to compare the models on efficiency measurements and the models were evaluated to analyze traffic safety parameters. In this assessment, interaction between pedestrians and bicycles was given priority. The research result shows improvement of the traffic efficiency of bicycle highways within the alternatives proposed. The loop pause time decreased up to 7%, the number of stops decreased by 28%, bicycle travel time has been reduced up to 7%. The results of this research show improvement of the traffic efficiency of bicycle highways within the alternatives proposed.
{"title":"Implementing an Urban Bicycle Highway on Pedestrian Traffic - Finding a Traffic Control Strategy with Optimal Coordination for the City Center of Munich","authors":"Arifin Islam, T. Adnan","doi":"10.37421/JCDE.2020.10.365","DOIUrl":"https://doi.org/10.37421/JCDE.2020.10.365","url":null,"abstract":"Bicycle highways are specially designed infrastructures allowing cyclists to travel at a considerable speed through different environments. These elements in densely built urban areas are difficult to understand, since many requirements and standards need to be met. Serving all modes of traffic with acceptable efficiency and implementing a bicycle highway design is a challenge and therefore the aim of this study is to define a strategy for bicycle road traffic control in an urban area, the city center of Munich, which will improve its traffic efficiency. The current situation of the studied area was developed in PTV VISSIM to achieve the objective. Firstly, the base model was calibrated and validated to match the present state and synchronized separately for bicycles and cars. Five alternative models were developed based on coordinating and developing the bicycle highway infrastructure. Attempts were made to compare the models on efficiency measurements and the models were evaluated to analyze traffic safety parameters. In this assessment, interaction between pedestrians and bicycles was given priority. The research result shows improvement of the traffic efficiency of bicycle highways within the alternatives proposed. The loop pause time decreased up to 7%, the number of stops decreased by 28%, bicycle travel time has been reduced up to 7%. The results of this research show improvement of the traffic efficiency of bicycle highways within the alternatives proposed.","PeriodicalId":52256,"journal":{"name":"Tumu yu Huanjing Gongcheng Xuebao/Journal of Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82876960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：