This study assesses the level of radioactivity, its corresponding dose and risk in areas of intense agropastoral activities in the Mayo-Sava, Mayo-Tsanaga and Mayo-Kani Divisions of the Far North region of Cameroon. The ultimate aim is to show that beyond the geological structure and mineralogical composition of the soil, agricultural fertilizers and animal droppings from livestock farming can contribute significantly to the elevation of the 40K-induced radioactivity level in an environment. Natural radionuclide analysis was carried out on 55 soil samples collected from the three aforementioned localities, using a laboratory NaI (Tl) gamma spectrometer. The mean activity concentrations of 238U, 232Th and 40K were 41, 59 and 529 Bq/kg respectively. The total effective dose to the public and the risk of cancer morbidity were generated by RESRAD-ONSITE code version 7.2. The 0.7 mSv/year maximum total effective dose was estimated at time t = 38 years, with contributions of 56%, 37.3%, 3.9%, 2.1%, 0.7% and 0.07% from plant ingestion, external exposure, meat ingestion, milk ingestion, soil ingestion and inhalation, respectively. Potassium-40 (40K) from plant ingestion is the major contributor. The doses in the initial year of agropastoral activity and the total excess cancer risk were 0.3 mSv/year and 1.165×10-3 respectively. The 40K contributions to effective dose from plant ingestion obtained in this work are high compared to areas where agropastoral activities are not intensive. This may be due to the various fertilizers and animal droppings distributed in nature which are very rich in potassium. Although potassium is essential to life, it is nevertheless necessary for radiation protection to take into account this type of radiological exposure which is not without harmful effects on the environment and health.
{"title":"Contribution of 40K arising from agropastoral activities to the total effective dose by plant ingestion in the Far-North, Cameroon","authors":"Awe Richard, Koyang François, Bineng Guillaume Samuel, Ndimantchi Ayoba, Takoukam Soh Serge Didier, Saïdou-","doi":"10.3934/environsci.2022027","DOIUrl":"https://doi.org/10.3934/environsci.2022027","url":null,"abstract":"This study assesses the level of radioactivity, its corresponding dose and risk in areas of intense agropastoral activities in the Mayo-Sava, Mayo-Tsanaga and Mayo-Kani Divisions of the Far North region of Cameroon. The ultimate aim is to show that beyond the geological structure and mineralogical composition of the soil, agricultural fertilizers and animal droppings from livestock farming can contribute significantly to the elevation of the 40K-induced radioactivity level in an environment. Natural radionuclide analysis was carried out on 55 soil samples collected from the three aforementioned localities, using a laboratory NaI (Tl) gamma spectrometer. The mean activity concentrations of 238U, 232Th and 40K were 41, 59 and 529 Bq/kg respectively. The total effective dose to the public and the risk of cancer morbidity were generated by RESRAD-ONSITE code version 7.2. The 0.7 mSv/year maximum total effective dose was estimated at time t = 38 years, with contributions of 56%, 37.3%, 3.9%, 2.1%, 0.7% and 0.07% from plant ingestion, external exposure, meat ingestion, milk ingestion, soil ingestion and inhalation, respectively. Potassium-40 (40K) from plant ingestion is the major contributor. The doses in the initial year of agropastoral activity and the total excess cancer risk were 0.3 mSv/year and 1.165×10-3 respectively. The 40K contributions to effective dose from plant ingestion obtained in this work are high compared to areas where agropastoral activities are not intensive. This may be due to the various fertilizers and animal droppings distributed in nature which are very rich in potassium. Although potassium is essential to life, it is nevertheless necessary for radiation protection to take into account this type of radiological exposure which is not without harmful effects on the environment and health.","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70231467","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 : 2022-01-01DOI: 10.3934/environsci.2022007
Karolina Nowocień, B. Sokołowska
Bacteria belonging to the genus Bacillus are widely distributed in environments fulfilling several important functions. Due to their ability to produce antibiotics and other metabolites, these bacteria limit the development of pathogens and thus promote plant growth. They also play an important role in the deodorization of organic fertilizers, including manure, slurry, and dung. This article describes the characteristics of Bacillus spp., their properties, and their application in biocontrol.
{"title":"Bacillus spp. as a new direction in biocontrol and deodorization of organic fertilizers","authors":"Karolina Nowocień, B. Sokołowska","doi":"10.3934/environsci.2022007","DOIUrl":"https://doi.org/10.3934/environsci.2022007","url":null,"abstract":"<abstract> <p>Bacteria belonging to the genus <italic>Bacillus</italic> are widely distributed in environments fulfilling several important functions. Due to their ability to produce antibiotics and other metabolites, these bacteria limit the development of pathogens and thus promote plant growth. They also play an important role in the deodorization of organic fertilizers, including manure, slurry, and dung. This article describes the characteristics of <italic>Bacillus</italic> spp., their properties, and their application in biocontrol.</p> </abstract>","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70231483","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 : 2022-01-01DOI: 10.3934/environsci.2022044
Suprava Ranjan Laha, B. K. Pattanayak, Saumendra Pattnaik
The emergence of the Internet of Things (IoT) has brought a revolution in global communication network technology. It has acquired many day-to-day applications in healthcare, education, agriculture, etc. In addition, IoT has also had a significant impact in the field of environmental monitoring.The significant factors in a healthy environment are air quality, water pollution, and waste management, where the world's population can live securely. Monitoring is necessary for us to achieve global sustainability. As monitoring technology has advanced in recent years, environmental monitoring systems have evolved from essential remote monitoring to an advanced environment monitoring (AEM) system, incorporating Internet of Things (IoT) technology and sophisticated sensor modules.The present manuscript aims to accomplish a critical review of noteworthy contributions and research studies about environmental monitoring systems, which involve monitoring air quality, water quality, and waste management.The rapid growth of the world's population and the exhaustion of natural resources, coupled with the increasing unpredictability of environmental conditions, lead to significant concerns about worldwide food security, global warming, water pollution, and waste overflowing. Automating tasks in the building environment, based on the Internet of Things (IoT) application, is meant to eliminate problems with the traditional approach. This study aims to examine and evaluate numerous studies involving monitoring air, water, waste, and overall environmental pollution, as well as their effect on the environment. This article categorizes studies based on their research purposes, techniques, and findings. This paper examines advanced environmental monitoring systems through sensor technology, IoT, and machine learning.
{"title":"Advancement of Environmental Monitoring System Using IoT and Sensor: A Comprehensive Analysis","authors":"Suprava Ranjan Laha, B. K. Pattanayak, Saumendra Pattnaik","doi":"10.3934/environsci.2022044","DOIUrl":"https://doi.org/10.3934/environsci.2022044","url":null,"abstract":"The emergence of the Internet of Things (IoT) has brought a revolution in global communication network technology. It has acquired many day-to-day applications in healthcare, education, agriculture, etc. In addition, IoT has also had a significant impact in the field of environmental monitoring.The significant factors in a healthy environment are air quality, water pollution, and waste management, where the world's population can live securely. Monitoring is necessary for us to achieve global sustainability. As monitoring technology has advanced in recent years, environmental monitoring systems have evolved from essential remote monitoring to an advanced environment monitoring (AEM) system, incorporating Internet of Things (IoT) technology and sophisticated sensor modules.The present manuscript aims to accomplish a critical review of noteworthy contributions and research studies about environmental monitoring systems, which involve monitoring air quality, water quality, and waste management.The rapid growth of the world's population and the exhaustion of natural resources, coupled with the increasing unpredictability of environmental conditions, lead to significant concerns about worldwide food security, global warming, water pollution, and waste overflowing. Automating tasks in the building environment, based on the Internet of Things (IoT) application, is meant to eliminate problems with the traditional approach. This study aims to examine and evaluate numerous studies involving monitoring air, water, waste, and overall environmental pollution, as well as their effect on the environment. This article categorizes studies based on their research purposes, techniques, and findings. This paper examines advanced environmental monitoring systems through sensor technology, IoT, and machine learning.","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70232089","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 : 2022-01-01DOI: 10.3934/environsci.2022006
F. Sgroi
The ways in which the agricultural landscape has been used and managed by man has resulted in substantial changes over time in relation to the economic changes and social needs of local communities. In recent times, thanks to the multifunctional vision of agriculture, growing interest has focused on the recreational aspects of the landscape as a function of its usability. This interest derives both from its importance, highlighted by numerous studies on this aspect, and from its link with rural tourism. The latter phenomenon is growing rapidly and is capable of triggering important processes of development and local growth. In this context, the present study highlights some preliminary considerations on the relationships that, from the point of view of sustainable local development, exist between possible types of tourism and methods of landscape management. To this end, first explore some features of the agricultural landscape and their possible economic evaluations. The study shows that an agricultural landscape in which man is present with agricultural activity, and where the service sector offers adequate opportunities for receptivity, it is possible to create growth and development paths for the local economy. The empirical analysis carried out in the Madonie shows that the resilience of the agricultural landscape is strictly connected to the presence of man in the territory.
{"title":"Agriculture and tourism: economic evaluation of sustainable land management","authors":"F. Sgroi","doi":"10.3934/environsci.2022006","DOIUrl":"https://doi.org/10.3934/environsci.2022006","url":null,"abstract":"The ways in which the agricultural landscape has been used and managed by man has resulted in substantial changes over time in relation to the economic changes and social needs of local communities. In recent times, thanks to the multifunctional vision of agriculture, growing interest has focused on the recreational aspects of the landscape as a function of its usability. This interest derives both from its importance, highlighted by numerous studies on this aspect, and from its link with rural tourism. The latter phenomenon is growing rapidly and is capable of triggering important processes of development and local growth. In this context, the present study highlights some preliminary considerations on the relationships that, from the point of view of sustainable local development, exist between possible types of tourism and methods of landscape management. To this end, first explore some features of the agricultural landscape and their possible economic evaluations. The study shows that an agricultural landscape in which man is present with agricultural activity, and where the service sector offers adequate opportunities for receptivity, it is possible to create growth and development paths for the local economy. The empirical analysis carried out in the Madonie shows that the resilience of the agricultural landscape is strictly connected to the presence of man in the territory.","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70231448","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 : 2022-01-01DOI: 10.3934/environsci.2022032
H. Nour, F. Ramadan, Nouf El Shammari, Mohamed Tawfik
To assess the heavy metals concentration in the coastal sediments of the southern Kuwait coast, Fe, Mn, Cu, Pb, Ni, Co, Cd and Cr were measured by inductively coupled plasma mass spectroscopy. Whereas, the south of Kuwait coast is characterized by the presence of tourist resorts, and commercial and oil exports harbors. Moreover, environmental indicators were used to help in evaluating the degree and the intensity of pollutants in these sediments. Geoaccumulation index (Igeo) revealed that the sediments of hard all Hamara and Al-Khiran coasts are moderately polluted by Cu, while Ras Al-Zour and Ras Al-Jula'ia coasts are moderately polluted by Cd. Moreover, the enrichment factor (EF) indicated that the sediments of Hadd Al-Hamara coast are severely enriched with Ni, Cr and Pb, while the Al-Khiran coast is moderate severely enriched with the same metals. Ras Al-Zour and Ras Al-Jula'ia coasts are severely enriched with Ni and very severely enriched with Pb. Simultaneously, all studied sites are extremely severely enriched with Cu and Cd. These results were confirmed by the results of the contamination factor (CF) and the soil pollution index (SPI) indicated that Hadd Al-Hamara and Al-Khiran coasts are highly contaminated with Cu and Cd, while Ras Al-Zour and Ras Al-Jula'ia coasts are highly contaminated with Cd. Generally, the pollution load index showed that the sediments of all studied sites are no heavy metal pollution (PLI < 1). Pollutants might be originated from commercial wastes and construction activities.
{"title":"Status and contamination assessment of heavy metals pollution in coastal sediments, southern Kuwait","authors":"H. Nour, F. Ramadan, Nouf El Shammari, Mohamed Tawfik","doi":"10.3934/environsci.2022032","DOIUrl":"https://doi.org/10.3934/environsci.2022032","url":null,"abstract":"To assess the heavy metals concentration in the coastal sediments of the southern Kuwait coast, Fe, Mn, Cu, Pb, Ni, Co, Cd and Cr were measured by inductively coupled plasma mass spectroscopy. Whereas, the south of Kuwait coast is characterized by the presence of tourist resorts, and commercial and oil exports harbors. Moreover, environmental indicators were used to help in evaluating the degree and the intensity of pollutants in these sediments. Geoaccumulation index (Igeo) revealed that the sediments of hard all Hamara and Al-Khiran coasts are moderately polluted by Cu, while Ras Al-Zour and Ras Al-Jula'ia coasts are moderately polluted by Cd. Moreover, the enrichment factor (EF) indicated that the sediments of Hadd Al-Hamara coast are severely enriched with Ni, Cr and Pb, while the Al-Khiran coast is moderate severely enriched with the same metals. Ras Al-Zour and Ras Al-Jula'ia coasts are severely enriched with Ni and very severely enriched with Pb. Simultaneously, all studied sites are extremely severely enriched with Cu and Cd. These results were confirmed by the results of the contamination factor (CF) and the soil pollution index (SPI) indicated that Hadd Al-Hamara and Al-Khiran coasts are highly contaminated with Cu and Cd, while Ras Al-Zour and Ras Al-Jula'ia coasts are highly contaminated with Cd. Generally, the pollution load index showed that the sediments of all studied sites are no heavy metal pollution (PLI < 1). Pollutants might be originated from commercial wastes and construction activities.","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70231721","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 : 2022-01-01DOI: 10.3934/environsci.2022030
R. Darmawan, S. Juliastuti, N. Hendrianie, O. Rachmaniah, Nadila Shafira Kusnadi, Ghassani Salsabila Ramadhani, Yawo Serge Marcel, Simpliste Dusabe, M. Tominaga
Carcinogenic hexavalent chromium is increasing worldwide due to the increased electroplating, welding and textile industry. On the other hand, molasses, the sugar factory's byproduct with high organic compounds (sugars), may pollute the environment if it is not processed. However, microbial fuel cell (MFC) seems to be a promising technology due to its ability to produce electrical energy from pollutant degradation using microbes while reducing hexavalent chromium to trivalent chromium with less toxicity. Carbon felt was used at both electrodes. This research aimed to determine the effect of modifying the anode with rice bran and cathode with Cu catalyst towards electricity generation and pollutant removal in molasses and reducing Cr (Ⅵ) into Cr (Ⅲ) using tubular microbial fuel cells. Moreover, the effect of mixing Sidoarjo mud and Shewanella oneidensis MR-1 as electricigen bacteria toward electrical energy production and pollutant removal was determined. Experiments revealed that the S/CM/AM variable, which only used Shewanella oneidensis MR-1 as an electricigen bacteria with both modified electrodes, produced the highest total power density of 530.42 mW/m2 and the highest percentage of Cr (Ⅵ) reduction of 98.87%. In contrast, the highest microbial population of 66.5 × 1010 cells/mL, 61.28% of Biological Oxygen Demand (BOD5) removal and 59.49% of Chemical Oxygen Demand (COD) were achieved by SSi/CM/AM variable, mixing Shewanella oneidensis MR-1 and Sidoarjo mud as an electricigen bacteria with both modified electrodes. Therefore, this study indicates that double chamber tubular microbial fuel cells may be a sustainable solution for managing molasses and carcinogen hexavalent chromium.
{"title":"Effect of electrode modification on the production of electrical energy and degradation of Cr (Ⅵ) waste using tubular microbial fuel cell","authors":"R. Darmawan, S. Juliastuti, N. Hendrianie, O. Rachmaniah, Nadila Shafira Kusnadi, Ghassani Salsabila Ramadhani, Yawo Serge Marcel, Simpliste Dusabe, M. Tominaga","doi":"10.3934/environsci.2022030","DOIUrl":"https://doi.org/10.3934/environsci.2022030","url":null,"abstract":"Carcinogenic hexavalent chromium is increasing worldwide due to the increased electroplating, welding and textile industry. On the other hand, molasses, the sugar factory's byproduct with high organic compounds (sugars), may pollute the environment if it is not processed. However, microbial fuel cell (MFC) seems to be a promising technology due to its ability to produce electrical energy from pollutant degradation using microbes while reducing hexavalent chromium to trivalent chromium with less toxicity. Carbon felt was used at both electrodes. This research aimed to determine the effect of modifying the anode with rice bran and cathode with Cu catalyst towards electricity generation and pollutant removal in molasses and reducing Cr (Ⅵ) into Cr (Ⅲ) using tubular microbial fuel cells. Moreover, the effect of mixing Sidoarjo mud and Shewanella oneidensis MR-1 as electricigen bacteria toward electrical energy production and pollutant removal was determined. Experiments revealed that the S/CM/AM variable, which only used Shewanella oneidensis MR-1 as an electricigen bacteria with both modified electrodes, produced the highest total power density of 530.42 mW/m2 and the highest percentage of Cr (Ⅵ) reduction of 98.87%. In contrast, the highest microbial population of 66.5 × 1010 cells/mL, 61.28% of Biological Oxygen Demand (BOD5) removal and 59.49% of Chemical Oxygen Demand (COD) were achieved by SSi/CM/AM variable, mixing Shewanella oneidensis MR-1 and Sidoarjo mud as an electricigen bacteria with both modified electrodes. Therefore, this study indicates that double chamber tubular microbial fuel cells may be a sustainable solution for managing molasses and carcinogen hexavalent chromium.","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70231634","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 : 2022-01-01DOI: 10.3934/environsci.2022037
Francis I. Johnson, Richard Laing, Bassam Bjeirmi, M. Leon
The effect of pipeline vandalism among other pipeline disasters has been drastic on the Nigerian economy. The research aims to examine the level of awareness of stakeholders on the immediate and remote causes of pipeline disasters in Nigeria. This involved comprehensive review of literature along with semi-structured and open-ended interviews (as a pilot study) to enrich and strengthen the literature in Nigerian context and subsequently follow-up with semi-structured questionnaire survey; analyzed through content analysis using both descriptive and inferential statistics. In the methodology, three levels were adopted: confirmatory factor analysis (CFA), measurement model and structural model in the carrying out of structural equation modelling (SEM) analysis. The CFA analyzes the relationship between the dominant's variables and their related indicators. Based on the analysis carried out, activities of vandals has the highest influence on pipeline disasters. Human impacts resulting from pipeline disasters are very significant in Nigeria. Also, ecological impacts resulting from pipeline disasters have been extremely significant in Nigeria. There is high level of awareness of pipeline disasters among the different stakeholders interviewed.
{"title":"Examining the causes and impacts of pipeline disasters in Nigeria","authors":"Francis I. Johnson, Richard Laing, Bassam Bjeirmi, M. Leon","doi":"10.3934/environsci.2022037","DOIUrl":"https://doi.org/10.3934/environsci.2022037","url":null,"abstract":"The effect of pipeline vandalism among other pipeline disasters has been drastic on the Nigerian economy. The research aims to examine the level of awareness of stakeholders on the immediate and remote causes of pipeline disasters in Nigeria. This involved comprehensive review of literature along with semi-structured and open-ended interviews (as a pilot study) to enrich and strengthen the literature in Nigerian context and subsequently follow-up with semi-structured questionnaire survey; analyzed through content analysis using both descriptive and inferential statistics. In the methodology, three levels were adopted: confirmatory factor analysis (CFA), measurement model and structural model in the carrying out of structural equation modelling (SEM) analysis. The CFA analyzes the relationship between the dominant's variables and their related indicators. Based on the analysis carried out, activities of vandals has the highest influence on pipeline disasters. Human impacts resulting from pipeline disasters are very significant in Nigeria. Also, ecological impacts resulting from pipeline disasters have been extremely significant in Nigeria. There is high level of awareness of pipeline disasters among the different stakeholders interviewed.","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70231872","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 : 2022-01-01DOI: 10.3934/environsci.2022023
S. Hota, S. Ghosh, Biswajit Sarkar
The current study focuses on a two-echelon supply chain for a reliable retailer, an unreliable manufacturer, and selling price-dependent demand. Due to an unreliable manufacturer and transportation hazards, shortages arise, which negatively impact the reputation of the retailer. Moreover, customers are more conscious of the environment, as a result, most of the industry focuses on the production of green products. To reduce the holding cost of the retailer, a fuel consumption-based single-setup-multi-unequal-increasing-delivery policy was utilized in this current study. With this transportation policy, the number of shipments increases, which directly increases carbon emissions and transportation hazards. To protect the environment, the green level of the product is enhanced through some investments. The demand varies with the price of the product as well as with the level of the greenness of the product. Due to uncertain demand, the rate of the production is treated as controllable. A classical optimization technique and distribution-free approach have been utilized to obtain the optimum solution and the optimized system profit. To prove the applicability, the study is illustrated numerically and graphically via a well-explained analysis of sensitivity. The study proves that single-setup-multi-unequal-increasing delivery policy is $ 0.62 % $ beneficial compared to single-setup-single-delivery policy and $ 0.35 % $ better than the single-setup-multi-delivery policy.
{"title":"A solution to the transportation hazard problem in a supply chain with an unreliable manufacturer","authors":"S. Hota, S. Ghosh, Biswajit Sarkar","doi":"10.3934/environsci.2022023","DOIUrl":"https://doi.org/10.3934/environsci.2022023","url":null,"abstract":"The current study focuses on a two-echelon supply chain for a reliable retailer, an unreliable manufacturer, and selling price-dependent demand. Due to an unreliable manufacturer and transportation hazards, shortages arise, which negatively impact the reputation of the retailer. Moreover, customers are more conscious of the environment, as a result, most of the industry focuses on the production of green products. To reduce the holding cost of the retailer, a fuel consumption-based single-setup-multi-unequal-increasing-delivery policy was utilized in this current study. With this transportation policy, the number of shipments increases, which directly increases carbon emissions and transportation hazards. To protect the environment, the green level of the product is enhanced through some investments. The demand varies with the price of the product as well as with the level of the greenness of the product. Due to uncertain demand, the rate of the production is treated as controllable. A classical optimization technique and distribution-free approach have been utilized to obtain the optimum solution and the optimized system profit. To prove the applicability, the study is illustrated numerically and graphically via a well-explained analysis of sensitivity. The study proves that single-setup-multi-unequal-increasing delivery policy is $ 0.62 % $ beneficial compared to single-setup-single-delivery policy and $ 0.35 % $ better than the single-setup-multi-delivery policy.","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70231364","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 : 2022-01-01DOI: 10.3934/environsci.2023001
N. Sunusi, Giarno
The shift from manual weather measurements to automation is almost inevitable. When switching to AWS (Automatic Weather Station), WMO requires parallel data testing between automatic and manual measurements to be performed. The purpose of this paper is to conduct a parallel test of AWS data using a simple statistical test that has been applied to three main weather parameters, namely temperature, pressure, humidity, rainfall, and wind direction and speed. The months of January and June were used as samples to represent the character of the wet and dry seasons in the Makassar monsoon area. The results of the analysis show that during the rainy season, only pressure and temperature are identical and homogeneous. Meanwhile, in the dry season, apart from these two parameters, humidity and wind speed are also homogeneous and rainfall is a non-homogeneous parameter in January and June. Both AWS and manual observations show that the influence of land-sea winds in Makassar is very strong. Considering that there are inhomogeneous parameters, it is highly recommended to test for a longer time, taking into account the season, the influence of other global phenomena, the effect of missing data and incorrect data testing various methods of homogeneity and characteristics in each place and their effect on forecasts.
{"title":"Bias of automatic weather parameter measurement in monsoon area, a case study in Makassar Coast","authors":"N. Sunusi, Giarno","doi":"10.3934/environsci.2023001","DOIUrl":"https://doi.org/10.3934/environsci.2023001","url":null,"abstract":"The shift from manual weather measurements to automation is almost inevitable. When switching to AWS (Automatic Weather Station), WMO requires parallel data testing between automatic and manual measurements to be performed. The purpose of this paper is to conduct a parallel test of AWS data using a simple statistical test that has been applied to three main weather parameters, namely temperature, pressure, humidity, rainfall, and wind direction and speed. The months of January and June were used as samples to represent the character of the wet and dry seasons in the Makassar monsoon area. The results of the analysis show that during the rainy season, only pressure and temperature are identical and homogeneous. Meanwhile, in the dry season, apart from these two parameters, humidity and wind speed are also homogeneous and rainfall is a non-homogeneous parameter in January and June. Both AWS and manual observations show that the influence of land-sea winds in Makassar is very strong. Considering that there are inhomogeneous parameters, it is highly recommended to test for a longer time, taking into account the season, the influence of other global phenomena, the effect of missing data and incorrect data testing various methods of homogeneity and characteristics in each place and their effect on forecasts.","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70232102","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 : 2022-01-01DOI: 10.3934/environsci.2022015
K. Kisielinski, B. Wojtasik
Unworn masks and masks provided to us after having been worn conformable to law (mandatory wearing of masks) served as test objects. In order to identify the distribution of living microorganisms on the surface of a mask dependent on exposure time and distance from the human face we conducted a staining study using the bengal rose method. The regular deposition of living microorganisms on artificial mask surfaces was more intense in the areas close to the mouth and nose. A time dependent accumulation was larger on the inside in comparison to the outside of the mask, even if the mask was not worn but only left in the room. The most interesting finding was the ability of microorganisms to penetrate all layers of the mask. We therefore conclude that masks are a suitable substrate for the cultivation of germs, even when not worn. Colonisation increases with human use and with time.
{"title":"Suitability of Rose Bengal sodium salt staining for visualisation of face mask contamination by living organisms","authors":"K. Kisielinski, B. Wojtasik","doi":"10.3934/environsci.2022015","DOIUrl":"https://doi.org/10.3934/environsci.2022015","url":null,"abstract":"Unworn masks and masks provided to us after having been worn conformable to law (mandatory wearing of masks) served as test objects. In order to identify the distribution of living microorganisms on the surface of a mask dependent on exposure time and distance from the human face we conducted a staining study using the bengal rose method. The regular deposition of living microorganisms on artificial mask surfaces was more intense in the areas close to the mouth and nose. A time dependent accumulation was larger on the inside in comparison to the outside of the mask, even if the mask was not worn but only left in the room. The most interesting finding was the ability of microorganisms to penetrate all layers of the mask. We therefore conclude that masks are a suitable substrate for the cultivation of germs, even when not worn. Colonisation increases with human use and with time.","PeriodicalId":45143,"journal":{"name":"AIMS Environmental Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70231161","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}
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