scholarly journals Plutonium chemistry under conditions relevant for WIPP performance assessment. Review of experimental results and recommendations for future work

2000 ◽  
Author(s):  
Virginia M. Oversby
Keyword(s):  
Performance Assessment ◽  
Experimental Results ◽  
Future Work

Performance assessment of a candidate architecture for real-time woofer-tweeter controllers: simulation and experimental results

2013 ◽  
Author(s):  
Andrew Norton ◽  
Don Gavel ◽  
Renate Kupke ◽  
Marc Reinig ◽  
Srikar Srinath ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Real Time ◽  
Experimental Results

Influence of Carbonate on Uranium Solubility in the WIPP

2012 ◽  
Vol 1444 ◽  
Author(s):  
Jean-Francois Lucchini ◽  
Sally Ballard ◽  
Hnin Khaing
Keyword(s):  
Performance Assessment ◽  
Pilot Plant ◽  
Solubility Limit ◽  
Experimental Results ◽  
Waste Isolation Pilot Plant ◽  
Long Term Experiments ◽  
Order Of Magnitude ◽  
Carbonate Complexation ◽  
Borate Complexation

ABSTRACTIn the performance assessment (PA) for the Waste Isolation Pilot Plant (WIPP), the solubility of uranium (VI) was conservatively set at 10-3 M for all expected WIPP conditions, including the potential and likely effects of carbonate complexation [1]. Under WIPP-relevant conditions, long-term experiments were performed to establish the uranium (VI) solubility limits in WIPP-simulated brine over a broad range of pCH+ values [7.5-12.5] and to evaluate the contribution of carbonate complexation and hydrolysis to uranium (VI) speciation. Data obtained in carbonate-free ERDA-6 brine, a simulated WIPP brine, were reported earlier [2]. In the absence of carbonate, uranium solubility approached 10-7 M at the expected pCH+ in the WIPP (~ 9.5). In the presence of a significant amount of carbonate (millimole levels), recent experimental results showed that uranium (VI) concentrations will not exceed 10-4M. This measured solubility limit is an order of magnitude lower than the uranium solubility value currently used in the WIPP PA [3]. A small effect of borate complexation was found in the pCH+ range [7.5-10]. At pCH+ ≥ 10, hydrolysis overwhelmed carbonate effects, and no amphoteric effect was observed.

A Comparative, Experimental Study of Model Suitability to Describe Vehicle Rollover Dynamics for Control Design

2005 ◽  
Author(s):  
John T. Cameron ◽  
Sean Brennan
Keyword(s):  
Experimental Validation ◽  
Controller Design ◽  
Experimental Testing ◽  
Control Strategies ◽  
Control Design ◽  
Experimental Results ◽  
Dynamics And Control ◽  
Vehicle Rollover ◽  
And Control ◽  
Future Work

This work presents results of an initial investigation into models and control strategies suitable to prevent vehicle rollover due to untripped driving maneuvers. Outside of industry, the study of vehicle rollover inclusive of both experimental validation and practical controller design is limited. The researcher interested in initiating study on rollover dynamics and control is left with the challenging task of identifying suitable vehicle models from the literature, comparing these models with experimental results, and determining suitable parameters for the models. This work addresses these issues via experimental testing of published models. Parameter estimation data based on model fits is presented, with commentary given on the validity of different methods. Experimental results are then presented and compared to the output predicted by the various models in both the time and frequency domain in order to provide a foundation for future work.

Geographical query reformulation using a geographical adjacency taxonomy builder and word senses

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Omar El Midaoui ◽  
Btihal El Ghali ◽  
Abderrahim El Qadi ◽  
Moulay Driss Rahmani
Keyword(s):  
Semantic Analysis ◽  
Experimental Results ◽  
Query Reformulation ◽  
Components Separation ◽  
Content Type ◽  
Spatial Entities ◽  
Spatial Entity ◽  
Future Work ◽  
Data Context ◽  
Word Senses

Purpose Geographical query formulation is one of the key difficulties for users in search engines. The purpose of this study is to improve geographical search by proposing a novel geographical query reformulation (GQR) technique using a geographical taxonomy and word senses. Design/methodology/approach This work introduces an approach for GQR, which combines a method of query components separation that uses GeoNames, a technique for reformulating these components using WordNet and a geographic taxonomy constructed using the latent semantic analysis method. Findings The proposed approach was compared to two methods from the literature, using the mean average precision (MAP) and the precision at 20 documents (P@20). The experimental results show that it outperforms the other techniques by 15.73% to 31.21% in terms of P@20 and by 17.81% to 35.52% in terms of MAP. Research limitations/implications According to the experimental results, the best created taxonomy using the geographical adjacency taxonomy builder contains 7.67% of incorrect links. This paper believes that using a very big amount of data for taxonomy building can give better results. Thus, in future work, this paper intends to apply the approach in a big data context. Originality/value Despite this, the reformulation of geographical queries using the new proposed approach considerably improves the precision of queries and retrieves relevant documents that were not retrieved using the original queries. The strengths of the technique lie in the facts of reformulating both thematic and spatial entities and replacing the spatial entity of the query with terms that explain the intent of the query more precisely using a geographical taxonomy.

Orientation and Insertion of Randomly Presented Parts Using Vibratory Agitation

1991 ◽  
Author(s):  
Paul H. Moncevicz ◽  
Mark J. Jakiela ◽  
Karl T. Ulrich
Keyword(s):  
Experimental Results ◽  
Automated Assembly ◽  
New Approach ◽  
Initial Implementation ◽  
Future Work

Abstract In this article, we propose a new approach to automated assembly. Currently, automated assembly is expensive and difficult because all of the machines required for its implementation impose organization on the parts being assembled. It is this organization that is costly. We investigate an approach that requires less organization and results in assembly as a bulk process. We describe an initial implementation of this approach with a particular parts presentation system. Experiments are performed to determine the part characteristics that promote the success of the implementation. The experimental results are described and future work is suggested.

Corrosion-Resistant Electrochemical Platings on Magnesium Alloys: A State-of-the-Art Review

CORROSION ◽  
2012 ◽  
Vol 68 (6) ◽  
pp. 518-535 ◽  
Author(s):  
X.B. Chen ◽  
H.Y. Yang ◽  
T.B. Abbott ◽  
M.A. Easton ◽  
N. Birbilis
Keyword(s):  
Ionic Liquids ◽  
High Temperature ◽  
Performance Assessment ◽  
Magnesium Alloys ◽  
Electroless Plating ◽  
Molten Salts ◽  
State Of The Art ◽  
Corrosion Resistant ◽  
The Common ◽  
Future Work

Industrial deployment of magnesium alloys in most instances requires anti-corrosion coatings. Distinct from conversion coatings, the electro/electroless plating techniques are emerging as the common means of coating magnesium; however, more research is needed. A state-of-the-art review was undertaken with respect to aqueous plating systems (including pretreatment, under-coating, and electroplating), electroless plating (being treated individually, though it is used as undercoating for subsequent plating in some cases), non-aqueous plating systems (including high-temperature molten salts and ionic liquids), and novel plating methods. In addition to the performance assessment of various plated coatings on magnesium alloys, merits and demerits of existing plating techniques are discussed. Based on the literature to date, the practical issues faced in magnesium plating are raised, and possible advances discussed, providing some instructive guidelines for future work.

scholarly journals Principles of Green Design: Analyzing User Activities and Product Feedback

2012 ◽  
Author(s):  
Nicole Esposito ◽  
Julie Linsey
Keyword(s):  
Energy Savings ◽  
Negative Impact ◽  
Experimental Results ◽  
Environmental Attitude ◽  
Environmentally Responsible Behavior ◽  
Product Usage ◽  
Responsible Behavior ◽  
Environmentally Responsible ◽  
Future Work ◽  
User Activities

This study investigated the design principles applicable to environmentally friendly product design. An experimental approach was taken to examine principles that aid designers in producing an eco-friendly product that consumers will enjoy and use. Another important aspect to this study was to determine whether a user’s positive environmental attitude or a willingness to change for the environment relates to environmentally responsible behavior. Two hypotheses were developed for successful eco-friendly products and then appropriate products were purchased and modified to test these hypotheses. The activity hypothesis claims that if a product adds user activities, is less likely to be used. The feedback hypothesis states that a product that gives clear feedback is more likely to be used than a product that does not. Student participants took home products to use for one week, recorded each time they used the products, and then completed surveys afterword. For the activity hypothesis, we supposed that the product not adding user activities would be used more than the product adding activities. However, the experimental results have shown that this may not always be the case. For the feedback hypothesis, we speculated that visual reminder feedback and energy savings feedback both increase product usage. An increase in eco-friendly product usage would lead to a lessened negative impact that products are having on our environment. Experimental results indicate that there were errors in the experimental design, but these problems also aid in future work for this research.

Performance Assessment of Photocatalyst for Ethanol Removal

2011 ◽  
Vol 213 ◽  
pp. 35-38
Author(s):  
Chih Ming Ma ◽  
Gui Bing Hong ◽  
Yong Chuan Lo ◽  
Chang Tang Chang
Keyword(s):  
Performance Assessment ◽  
Equilibrium Constant ◽  
Residence Time ◽  
Uv Irradiation ◽  
Rate Constant ◽  
Reaction Rate ◽  
Adsorption Equilibrium ◽  
Reaction Rate Constant ◽  
Experimental Results ◽  
Ethanol Removal

This study evaluated the performance of a photoreactor packed with TiO2/Quartz and ZrO2/Quartz, ZnO/Quartz, initiated by UV irradiation. The experimental results showed that the concentration of VOCs increased and the degration efficiency decreased at the same residence time. Additionally, as the residence time increased, degration efficiency increased. According to the Langmuir-Hinshelwood Model’s predicted results, the reaction rate constant (kc) was 50.1, 7.2, and 3.0 ppm min-1 for TiO2/Quartz, ZrO2/Quartz and ZnO/Quartz, respectively. In contrast, the adsorption equilibrium constant (K) was 10.0, 21.9, and 2.4 ppm-1 with the previous catalyst, individually.

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