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Discrepant responses of soil organic carbon dynamics to nitrogen addition in different layers: a casestudy in an agroecosystem RESEARCH ARTICLE

Frontiers of Agricultural Science and Engineering 2024, Volume 11, Issue 2,   Pages 314-325 doi: 10.15302/J-FASE-2024565

Abstract: In this study, soils under varying N fertilizer application rates were sampled up to 100 cm deep to examine

Keywords： case study agroecosystem     Discrepant responses soil    

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EXPLORING THE RECYCLING OF MANURE FROM URBAN LIVESTOCK FARMS: A CASE STUDY IN ETHIOPIA

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1,

Abstract:

• Livestock manure was the main organic waste in urban and peri-urban areas.

• Manure production will increase by a factor of 3–10 between 2015–2050.

• Only 13%–38% of excreted N by livestock will be recycled in croplands.

• Intensification of urban livestock production greatly increased N surpluses.

• Reducing population growth and increasing livestock productivity needed.

 

Urban population growth is driving the expansion of urban and peri-urban agriculture (UPA) in developing countries. UPA is providing nutritious food to residents but the manures produced by UPA livestock farms and other wastes are not properly recycled. This paper explores the effects of four scenarios: (1) a reference scenario (business as usual), (2) increased urbanization, (3) UPA intensification, and (4) improved technology, on food-protein self-sufficiency, manure nitrogen (N) recycling and balances for four different zones in a small city (Jimma) in Ethiopia during the period 2015-2050. An N mass flow model with data from farm surveys, field experiments and literature was used. A field experiment was conducted and N use efficiency and N fertilizer replacement values differed among the five types of composts derived from urban livestock manures and kitchen wastes. The N use efficiency and N fertilizer replacement values were used in the N mass flow model.

Livestock manures were the main organic wastes in urban areas, although only 20 to 40% of animal-sourced food consumed was produced in UPA, and only 14 to 19% of protein intake by residents was animal-based. Scenarios indicate that manure production in UPA will increase 3 to 10 times between 2015 and 2050, depending on urbanization and UPA intensification. Only 13 to 38% of manure N will be recycled in croplands. Farm-gate N balances of UPA livestock farms will increase to>1 t·ha−1 in 2050. Doubling livestock productivity and feed protein conversion to animal-sourced food will roughly halve manure N production.

Costs of waste recycling were high and indicate the need for government incentives. Results of these senarios are wake-up calls for all stakeholders and indicate alternative pathways.

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Microplastics in municipal wastewater treatment plants: a case study of Denizli/Turkey

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1699-8

Abstract:

● High amounts of microplastics are released to receiving media from WWTPs.

Keywords： Microplastics     Wastewater treatment plant     Removal efficiency     Daily discharge    

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Identification of variants associated with sporadic thoracic aortic dissection: a case--control study

Frontiers of Medicine 2021, Volume 15, Issue 3,   Pages 438-447 doi: 10.1007/s11684-020-0826-1

Abstract: Our study identified a profile of known heritable TAD genes in the Chinese STAD population and found

Keywords： sporadic thoracic aortic dissection     exome sequencing     gene COL3A1     case–control study     extracellular    

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Optimizing nitrogen management in the food system for sustainable development: a case study of Quzhou REVIEW

Frontiers of Agricultural Science and Engineering 2024, Volume 11, Issue 1,   Pages 113-121 doi: 10.15302/J-FASE-2024540

Abstract: This study employed strategies for optimizing N management in the food system, using Quzhou County asThis study provides new insights into the synergistic achievement of multi-objective N management in

Keywords： Agriculture green development     food system     multi-objective     nitrogen management    

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Stock Volatility Increases the Mortality Risk of Major Adverse Cardiovascular Events and Suicide: A Case-CrossoverStudy of 12 Million Deaths

Ya Gao,Peng Yin,Haidong Kan,Renjie Chen,Maigeng Zhou,

Engineering doi: 10.1016/j.eng.2024.05.010

Abstract: Here, we conducted an individual-level time-stratified case-crossover study to explore the association

Keywords： Stock volatility     Major adverse cardiovascular events     Suicide     Case-crossover study    

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Screening of indicator pharmaceuticals and personal care products in landfill leachates: a case study

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1716-y

Abstract:

● A systematic framework was developed to identify i-PPCPs for landfill leachate.

Keywords： Landfill leachates     PPCPs     Indicator     Screening criteria     Source-specificity    

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Supplier development and its incentives in infrastructure mega-projects: A case study on Hong Kong-Zhuhai-Macao

Wei ZENG, Jinwen ZHANG, Hongwei WANG, Hongtao ZHOU

Frontiers of Engineering Management 2018, Volume 5, Issue 1,   Pages 88-97 doi: 10.15302/J-FEM-2018077

Abstract: In this paper the Hong Kong-Zhuhai-Macao Bridge project is taken as a case to analyze supplier development

Keywords： infrastructure mega-project     supplier development     critical success factors     incentives     case study    

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Pavement sustainability index for highway infrastructures: A case study of Maryland

Stella O. OBAZEE-IGBINEDION, Oludare OWOLABI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 2,   Pages 192-200 doi: 10.1007/s11709-017-0413-y

Abstract: Pavement deterioration creates conditions that undermine their performances, which gives rise to the need for maintenance and rehabilitation. This paper develops a mathematical multi-linear regression analysis (MLRA) model to determine a pavement sustainability index ( ) as dependent variable for flexible pavements in Maryland. Four categories of pavement performance evaluation indicators are subdivided into seven pavement condition indices and analyzed as independent variables for each section of pavement. Data are collected from five different roadways using field evaluations and existing database. Results indicate that coefficient of determination ( ) is correlated and significant, = 0.959. Of the seven independent variables, present serviceability index ( ) is the most significant with a coefficient value of 0.032, present serviceability rating ( ) coefficient value= 0.028, and international roughness index ( ) coefficient value= ?0.001. Increasing each unit value of coefficients for and would increase the value of ; thereby providing a more sustainable pavement infrastructure; which explains the significance of the model and why will most likely impact environmental, economic and social values.

Keywords： pavement indices     sustainability     pavement performance     flexible pavements    

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TRADE-OFFS IN THE DESIGN OF SUSTAINABLE CROPPING SYSTEMS AT A REGIONAL LEVEL: A CASE STUDY ON THE NORTH

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 2,   Pages 295-308 doi: 10.15302/J-FASE-2021434

Abstract:

Since the Green Revolution cropping systems have been progressively homogenized and intensified with increasing rates of inputs such as fertilizers, pesticides and water. This has resulted in higher crop productivity but also a high environmental burden due to increased pollution and water depletion. To identify opportunities for increasing the productivity and reducing the environmental impact of cropping systems, it is crucial to assess the associated trade-offs. The paper presents a model-based analysis of how 30 different crop rotations practiced in the North China Plain could be combined at the regional level to overcome trade-offs between indicators of economic, food security, and environmental performance. The model uses evolutionary multi-objective optimization to maximize revenues, livestock products, dietary and vitamin C yield, and to minimize the decline of the groundwater table. The modeling revealed substantial trade-offs between objectives of maximizing productivity and profitability versus minimizing ground water decline, and between production of livestock products and vitamin C yield. Six strategies each defining a specific combination of cropping systems and contributing to different extents to the various objectives were identified. Implementation of these six strategies could be used to find opportunities to mitigate the trade-offs between objectives. It was concluded that a holistic analysis of the potential of a diversity cropping systems at a regional level is needed to find integrative solutions for challenges due to conflicting objectives for food production, economic viability and environmental protection.

Keywords： crop rotation / food security / multi-objective optimization / water use    

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Comparison of indirect boundary element and finite element methods A case study: Shiraz-Esfahan railway

Amin MANOUCHEHRIAN, Mohammad Fatehi MARJI, Mohsen MOHEBBI

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 385-392 doi: 10.1007/s11709-012-0173-7

Abstract: Results of current theoretical study have shown that the presented approach using IBEM is reasonably

Keywords： indirect boundary element method     finite element method     displacement     tunnel     case study    

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Classification and quantification of excavated soil and construction sludge: A case study in Wenzhou,

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 202-213 doi: 10.1007/s11709-021-0795-8

Abstract: The present study has attempted to classify the excavated soil and construction sludge according to theirA case study in Wenzhou city of China was also pursued to illustrate the validity of the newly developed

Keywords： excavated soil     construction sludge     geotechnical and underground engineering     production     classification    

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Aerosol transmission, an indispensable route of COVID-19 spread: case study of a department-store cluster

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-021-1386-6

Abstract:

• Aerosol transmission is an indispensable route of COVID-19 spread.

Keywords： SARS-CoV-2     COVID-19     Environmental factor     Aerosol transmission     Epidemiologic characteristic    

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Assessing the potential impacts of public transport-based crowdshipping: A case study in a central district

Frontiers of Engineering Management doi: 10.1007/s42524-024-4019-5

Abstract: A case study conducted in the central district of Copenhagen utilizing real-world data assesses the effects

Keywords： last-mile delivery     crowdshipping     public transport-based crowdshipping     integrated passenger and freight transportation     impact assessment    

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An integrated framework for automatic green building evaluation: A case study of China

Frontiers of Engineering Management 2024, Volume 11, Issue 2,   Pages 269-287 doi: 10.1007/s42524-023-0274-0

Abstract: accordance with the Assessment Standard for Green Building (GB/T 50378-2019) in China, this studyUltimately, a residential building is employed as a case study to validate the theoretical and technical

Keywords： automatic evaluation     green building     BIM     web map service     ontology inference application    

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Title Author Date Type Operation

Discrepant responses of soil organic carbon dynamics to nitrogen addition in different layers: a casestudy in an agroecosystem

Journal Article

EXPLORING THE RECYCLING OF MANURE FROM URBAN LIVESTOCK FARMS: A CASE STUDY IN ETHIOPIA

Journal Article

Microplastics in municipal wastewater treatment plants: a case study of Denizli/Turkey

Journal Article

Identification of variants associated with sporadic thoracic aortic dissection: a case--control study

Journal Article

Optimizing nitrogen management in the food system for sustainable development: a case study of Quzhou

Journal Article

Stock Volatility Increases the Mortality Risk of Major Adverse Cardiovascular Events and Suicide: A Case-CrossoverStudy of 12 Million Deaths

Ya Gao,Peng Yin,Haidong Kan,Renjie Chen,Maigeng Zhou,

Journal Article

Screening of indicator pharmaceuticals and personal care products in landfill leachates: a case study

Journal Article

Supplier development and its incentives in infrastructure mega-projects: A case study on Hong Kong-Zhuhai-Macao

Wei ZENG, Jinwen ZHANG, Hongwei WANG, Hongtao ZHOU

Journal Article

Pavement sustainability index for highway infrastructures: A case study of Maryland

Stella O. OBAZEE-IGBINEDION, Oludare OWOLABI

Journal Article

TRADE-OFFS IN THE DESIGN OF SUSTAINABLE CROPPING SYSTEMS AT A REGIONAL LEVEL: A CASE STUDY ON THE NORTH

Journal Article

Comparison of indirect boundary element and finite element methods A case study: Shiraz-Esfahan railway

Amin MANOUCHEHRIAN, Mohammad Fatehi MARJI, Mohsen MOHEBBI

Journal Article

Classification and quantification of excavated soil and construction sludge: A case study in Wenzhou,

Journal Article

Aerosol transmission, an indispensable route of COVID-19 spread: case study of a department-store cluster

Journal Article

Assessing the potential impacts of public transport-based crowdshipping: A case study in a central district

Journal Article

An integrated framework for automatic green building evaluation: A case study of China

Journal Article