Groundwater quality assessment for the Upper East Fork Poplar Creek Hydrogeologic Regime at the Y-12 Plant. 1991 groundwater quality data and calculated rate of contaminant migration
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Section 3.0. A discussion of the interpretive assumptions used in evaluating the 1991 assessment data, and detailed descriptions of groundwater quality are presented in Section 4.0. Findings of the 1991 monitoring program are summarized in Section 5.0. Proposed modifications to the groundwater quality monitoring program in the UEFPCHR are presented.Keywords:
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It is imperative to reevaluate groundwater resources in Qianjin source field, DaQing City where groundwater system has been changed since the 1980s as the result of intensive exploitation of groundwater resources. Based on hydrogeological data and groundwater chemical analysis data and the theory and methodologies of groundwater chemical dynamics in combination with limited pumping test data, some groundwater chemical index such as activity of component(α)、mineral saturation index(β) are calculated and some hydrogeological parameters such as hydraulic conductively(k),transmissibility(T),artual speed of groundwater(U)、specific velocity(V) and groundwater age(t) are also calculated zonally.The above calculation results are beneficial to quantificationally recognize the local hydrogeological conditions and to attest that the confined aquifer of Taconic formation has good permeability and transmissibility and t good renewal ability because of the active groundwater movement. This case can supply not only hydrogeological parameters for groundwater resources evaluation but also quantificational basis for sustainable and reasonable development and management of groundwater resources.
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Most Bitcoin systems use blockchain technology to store all historical transaction data. Blockchain is a linked list structure but may be changed to a fork structure; a useful fork or an intentional fork. The useful fork may occur when the rules of the block are updated. On the other side, the intentional fork occurs when a miner has supercomputer properties that generate a set of blocks as a branch and does not publish this branch to the blockchain until the length of that branch is greater than the length of the main branch. When this fork occurs in the system, a set of blockchain transactions will be rollbacked, user waiting times increases, and miner rewards increases illegally. In this paper, the Lightweight algorithm is proposed to avoid the intentional fork issue and therefore rollback issue, users waiting time is reduced in the transaction process. The proposed algorithm is to make a single publisher in the system and divides the block construction into two phases. In the first phase, a miner generates a block and sends it to the memory pool. In the second phase, the memory pool will publish the block to the blockchain. The results show that the proposed algorithm has a good ability to avoid the intentional fork issue in the blockchain and the rollback issue thus minimize user waiting times.
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The received wisdom suggests that Unix's unusual combination of fork() and exec() for process creation was an inspired design. In this paper, we argue that fork was a clever hack for machines and programs of the 1970s that has long outlived its usefulness and is now a liability. We catalog the ways in which fork is a terrible abstraction for the modern programmer to use, describe how it compromises OS implementations, and propose alternatives.
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Fish measurement
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This paper confirms that the mining of the coal bed methane (CBM) are most significantly influenced by the hydrogeology parameters of the reservoir itself, the hydrogeology parameters, the supply properties and the geological structure of the roof and floor and other neighboring water-bearing rocks hydraulically associated with the coal bed as well as the difficulty degree of CBM mining; a evaluation indicator system structure of the hydrogeology conditions are established based on the foresaid conclusions and the CBM mining hydrogeology conditions are divided into “beneficial, moderate and adverse” grades; this paper finally divides the threshold to grade the hydrogeology condition evaluation indicators and a complete CBM mining hydrogeology conditions evaluation indicator system is founded to evaluate the hydrogeology conditions.
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From Farm to Fork is a compilation of various essays organized around three overarching topics: an overview of the food system with all its complications, views from within the food system, and the federal and local policies needed to move the U.S. to a more sustainable food system in the future. The thoughtful organization of the chapters around these three areas contributes to the book’s readability and digestibility....
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