Impacts of Climate Change on the Agricultural Environment

Irrigated agriculture is expected to play a major role in reaching the broader development objectives of achieving food security and improvements in the quality of life, while conserving the environment, in both the developed and developing countries. Especially as we are faced with the prospect of global population growth from almost 6 billion today to at least 8 billion by 2025 [1]. In this context, the prospects of increasing the gross cultivated area, in both the developed and developing countries, are limited by the dwindling number of economically attractive sites for new large¬ scale irrigation and drainage projects. Therefore, any increase in agricultural production will necessarily rely largely on a more accurate estimation of crop water requirements on the one hand, and on major improvements in the operation, management and performance of existing irrigation and drainage systems, on the other.

2018 ◽  
Vol 1 (1) ◽  

Irrigated agriculture is expected to play a major role in reaching the broader development objectives of achieving food security and improvements in the quality of life, while conserving the environment, in both the developed and developing countries. Especially as we are faced with the prospect of global population growth from almost 6 billion today to at least 8 billion by 2025 [1].


Irrigated agriculture is expected to play a major role in reaching the broader development objectives of achieving food security and improvements in the quality of life, while conserving the environment, in both the developed and developing countries. Especially as we are faced with the prospect of global population growth from almost 6 billion today to at least 8 billion by 2025 [1].


2020 ◽  
Vol 138 (2) ◽  
pp. 187-200
Author(s):  
ALEKSANDRA NOWAK

The article provides an overview of the causes of the current environmental crisis, with three main sources being identifi ed: industrial development and large-scale agriculture, a rapidly growing global population, and environmental crime.The most serious environmental problems, such as global warming, air and soil pollution have also been characterised. The author briefl y charac-terises the defi nitions related to eco-criminology. The international commu-nity, governments, and NGOs are involved in improving the effectiveness of police cooperation in the fi ght against eco-crime, but it is still not effective enough.Environmental protection is currently one of the most important issues that humanity must address. The quality of our lives and maybe our surviv-al depend on it.


2018 ◽  
Vol 39 (2) ◽  
pp. 231-240
Author(s):  
Danping Ren ◽  
Kun Guo ◽  
Qiuyan Yao ◽  
Jijun Zhao

AbstractThe impairment-aware routing and wavelength assignment algorithm with probe flow (P-IA-RWA) can make an accurate estimation for the transmission quality of the link when the connection request comes. But it also causes some problems. The probe flow data introduced in the P-IA-RWA algorithm can result in the competition for wavelength resources. In order to reduce the competition and the blocking probability of the network, a new P-IA-RWA algorithm with segmentation monitoring-control mechanism (SMC-P-IA-RWA) is proposed. The algorithm would reduce the holding time of network resources for the probe flow. It segments the candidate path suitably for the data transmitting. And the transmission quality of the probe flow sent by the source node will be monitored in the endpoint of each segment. The transmission quality of data can also be monitored, so as to make the appropriate treatment to avoid the unnecessary probe flow. The simulation results show that the proposed SMC-P-IA-RWA algorithm can effectively reduce the blocking probability. It brings a better solution to the competition for resources between the probe flow and the main data to be transferred. And it is more suitable for scheduling control in the large-scale network.


2021 ◽  
Author(s):  
Allen Yen-Cheng Yu

Many large-scale online applications enable thousands of users to access their services simultaneously. However, the overall service quality of an online application usually degrades when the number of users increases because, traditionally, centralized server architecture does not scale well. In order to provide better Quality of Service (QoS), service architecture such as Grid computing can be used. This type of architecture offers service scalability by utilizing heterogeneous hardware resources. In this thesis, a novel design of Grid computing middleware, Massively Multi-user Online Platform (MMOP), which integrates the Peer-to-Peer (P2P) structured overlays, is proposed. The objectives of this proposed design are to offer scalability and system design flexibility, simplify development processes of distributed applications, and improve QoS by following specified policy rules. A Massively Multiplayer Online Game (MMOG) has been created to validate the functionality and performance of MMOP. The simulation results have demonstrated that MMOP is a high performance and scalable servicing and computing middleware.


2021 ◽  
Author(s):  
Allen Yen-Cheng Yu

Many large-scale online applications enable thousands of users to access their services simultaneously. However, the overall service quality of an online application usually degrades when the number of users increases because, traditionally, centralized server architecture does not scale well. In order to provide better Quality of Service (QoS), service architecture such as Grid computing can be used. This type of architecture offers service scalability by utilizing heterogeneous hardware resources. In this thesis, a novel design of Grid computing middleware, Massively Multi-user Online Platform (MMOP), which integrates the Peer-to-Peer (P2P) structured overlays, is proposed. The objectives of this proposed design are to offer scalability and system design flexibility, simplify development processes of distributed applications, and improve QoS by following specified policy rules. A Massively Multiplayer Online Game (MMOG) has been created to validate the functionality and performance of MMOP. The simulation results have demonstrated that MMOP is a high performance and scalable servicing and computing middleware.


2021 ◽  
Author(s):  
Anatoly Zeyliger ◽  
Olga Ermolaeva

<p>Until recently, new technologies introduced into irrigated agriculture were mainly aimed at developing one or several related control actions. However, the needs of society to increase the volume and improve the quality of agricultural products have led to significant qualitative changes in irrigated agriculture. The various robotic systems used for this have proven their effectiveness in the mechanization and automation of the irrigation process, as well as in the application of chemical fertilizers and chemical protection of agricultural crops from diseases and pests. This resulted in higher yields while lowering production costs.Nowadays, biotechnologies currently being developed and being introduced into irrigated agriculture, as well as systems for controlling and monitoring environmental impacts, are aimed at solving problems related to further increasing the efficiency of the use of natural resources, while minimizing the risks of negative impact on components and services of the environment.This is largely due to the impact of the rapid development of IC and sensor technologies aimed at creating production management systems based on the cyber-physical systems (CPS) paradigm. For this, there are using a holistic vision of the structure and cybernetic methods of management, artificial intelligence technologies, as well as digital platforms for integrating information flows between sub-subsystems of management, control, monitoring and decision support.In this context, the main difference between developed agricultural CPSs from the existing industrial agricultural systems focused on current economic efficiency lies in the plane of making agricultural production sustainable in the long term based on a balance between economic efficiency and the quality of natural resources used and services of the environment. From this point of view, irrigated agriculture focuses on the efficient use of natural resources, which are water, soil and air, as well as renewable and non-renewable (fossil) energy. At the same time, weather are considered as the impact of the external environment providing an irreplaceable source of water, heat and energy resources but with stochastic characteristics that are difficult to formalize. In connection with this diversity, a CPSs are built taking into account a complex compromise that takes into account many aspects of the negative impact of intensive agricultural production technologies on the qualitative and quantitative characteristics of these resources, not only in the place of their use, but also on the external environment beyond these limits. In this regard, water resources are one of the most important factors necessary, on the one hand, to impart long-term sustainability to irrigated agriculture, and on the one hand, as a factor that can lead in the near future to a significant decrease in fertility, as well as to a negative impact on the environmental services of the surrounding area. This contribution discusses some points of the development of an agricultural irrigation CPS’ subsystem aimed to monitor the soil moisture content at the root zone of the soil cover at the scale of irrigated agricultural crops and their relationship with industrial sprinkling technologies.Acknowledgments: The reported study was funded by RFBR, project number 19-29-05261 mk</p>


2019 ◽  
Vol 252 ◽  
pp. 01002
Author(s):  
Zbigniew Siemiątkowski

The paper describes sequence of machining operations that leads to the desired quality of the produced crankshaft, as well as in-situ inspection, correction and compensation procedures performed and controlled by computer. The form deviation values after correction are being compared with those obtained before. In case of crank pins, values of form deviations, and hence those of corrections, are much larger than for main journals. During the measurement, the probe collects data from 3600 points per revolution, and then averaging procedure reduces data down to 360 points. There are several algorithms for data processing available, so the operator may choose the one most appropriate. Substantial difference between out-of-roundness values of main journals and crank pivot was registered. Before form compensation, the former was between 0.01 and 0.02 mm, while the latter were in range 0.07-0.09 mm. Program of grinding is parametric, i.e. at each stage of the process all values responsible for the tool movement undergo correction. The applied computer monitoring enabled to achieve the demanded quality of grinded surface, as well as dimensions and form deviations in the tolerances set by the product specifications. Form compensation procedure enabled to reduce peak-to-peak deviation from 30.37 μm down to 8.14 μm.


2002 ◽  
Vol 11 (05) ◽  
pp. 459-475
Author(s):  
FRANK VAHID ◽  
TONY GIVARGIS ◽  
SUSAN COTTERELL

Memory accesses account for a large percentage of total power in microprocessor-based embedded systems. The increasing use of microprocessor cores and synthesis, rather than prefabricated microprocessor chips, creates the opportunity to tune a memory hierarchy to the one program that will execute in the embedded system. Such tuning requires fast and accurate estimation of the power and performance of different memory configurations. We describe a general three-step approach to developing such estimators, based on our experiences on several different projects. Each step is increasingly fast, using the previous step to gauge accuracy. The first step uses high-level functional simulation, the second step uses trace simulation, and the third step uses equations. A tool developer can follow these three steps to create a powerful environment for core users to support synthesis of the best memory hierarchy for a particular embedded system. The approach can be applied to components other than memory also.


Author(s):  
Yutian Chen ◽  
Oswald Chong

The Chinese construction industry (CCI) has grown to be one of the largest in the world within the last 10 years. The size of the CCI is on par with many developed nations, despite it being a developing country. Despite its rapid growth, the productivity and profitability of the CCI is low compared to similar sized construction industries. In addition to the low efficiency of the CCI, the minimal documented performance information collected, shows projects being completed over budget, over the scheduled time, with poor quality of work. A literature research was performed on other developing countries similar to the CCI, to identify if there were any solutions that had been proven to improve the productivity and performance of a construction industry. It was found that Vietnam, The Kingdom of Saudi Arabia and India were the closest to China with enough documentation on their construction industry. Both countries identified the Best value Approach (BVA) as the only solution with documented performance showing it could solve the issues developing countries face with their construction industry. This paper proposes that more research should be performed looking into the ability of the CCI to implement the BVA.


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