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Academic literature on the topic 'Flow aid'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Flow aid"

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Zond, John R. "Flow cytometry: A diagnostic aid." Journal of the American Osteopathic Association 90, no. 7 (July 1, 1991): 687–90. http://dx.doi.org/10.1515/jom-1991-900712.

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Oishi, Koji, Hiroto Ito, Yohsuke Murase, Hiroki Takikawa, and Takuto Sakamoto. "Evolution of global development cooperation: An analysis of aid flows with hierarchical stochastic block models." PLOS ONE 17, no. 8 (August 3, 2022): e0272440. http://dx.doi.org/10.1371/journal.pone.0272440.

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Despite considerable scholarly attention on the institutional and normative aspects of development cooperation, its longitudinal dynamics unfolding at the global level have rarely been investigated. Focusing on aid, we examine the evolving global structure of development cooperation induced by aid flows in its entirety. Representing annual aid flows between donors and recipients from 1970 to 2013 as a series of networks, we apply hierarchical stochastic block models to extensive aid-flow data that cover not only the aid behavior of the major OECD donors but also that of other emerging donors, including China. Despite a considerable degree of external expansion and internal diversification of aid relations over the years, the analysis has uncovered a temporally persistent structure of aid networks. The latter comprises, on the one hand, a limited number of major donors with far-reaching resources and, on the other hand, a large number of mostly poor but globally well-connected recipients. The results cast doubt on the efficacy of recurrent efforts for “aid reform” in substantially changing the global aid flow pattern.
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Moszynski, Peter. "High prices drive down flow of food aid." BMJ 336, no. 7658 (June 19, 2008): 1397.2–1397. http://dx.doi.org/10.1136/bmj.a372.

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Efobi, Uchenna, Ibukun Beecroft, and Simplice Asongu. "Foreign Aid and Corruption: Clarifying Murky Empirical Conclusions." Foreign Trade Review 54, no. 3 (July 19, 2019): 253–63. http://dx.doi.org/10.1177/0015732519851633.

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This study considers foreign aid flow by sector in which the aid is directed and then estimates its impact on corruption in order to clarify the specific direction of aid flow that triggers (or does not trigger) corrupt practices. Data are from the Organisation for Economic Co-operation and Development database, Freedom House dataset, and the World Bank Governance Indicators. The dynamic system GMM and quantile regressions (QR) were estimated for robust estimation and correction of endogeneity issues. We found that aid flows for the development of economic infrastructure, multi-sector and programme assistance were consistently reducing corruption. This result stands for both the entire sample and for the African countries (especially for countries at the 25th, 50th and 75th quintiles). Aid flows to social infrastructure and debt relief significantly induce corrupt practices in the sampled countries. These forms of aid only spur rent-seeking behaviour for countries at the lower quintiles of corruption. Two robust checks were estimated, including: (a) using an alternate explained variable—the corruption measure by Transparency International; and (b) correcting for endogeneity in the QR estimation by instrumenting the independent variables of interest with their first-lags. For both checks, the signs and significant values of the variables were consistent with the earlier estimation. JEL Codes: B20, F35, F50, O10, O55
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Abbas, Ali S., Noor Y. Abbas, and Shahed A. Kamel. "INVESTIGATION OF FLOW FIELD OVER POST FLOW MODEL WITH THE AID OF ePIV SYSTEM." IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING 18, no. 1 (July 31, 2018): 31–40. http://dx.doi.org/10.32852/iqjfmme.vol18.iss1.57.

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Post flow model was used in the present study as an insert model for the interactiveflow study innovative device namely called ePIV. The separation of the flow and itssubsequent reattachment to a solid surface occurs in many systems, and is of practical aswell as of theoretical interest. Three different values for the upstream velocity were selectedin the present work within the range (14, 24, and 32 mm\s) and two set of figures wereobserved for every value of upstream velocity. First set for velocity vector plots and shadedcolor plot while the second is for picture frames captured for the purpose of ePIV systemsoftware. It was found that ePIV system can be used in diverse educational settings becauseof its effectiveness as an educational tool, high-tech appeal, compact size, low cost andsafety. Also, It was concluded that the sudden appearance for the post height result in avortex spot that lead to an adverse pressure gradient concentrate the majority of high bulkvelocity magnitude at the upper half of the post flow model height.
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Woyengo, Tofuko A., Aaron J. Cowieson, Olayiwola Adeola, and Charles M. Nyachoti. "Ileal digestibility and endogenous flow of minerals and amino acids: responses to dietary phytic acid in piglets." British Journal of Nutrition 102, no. 3 (January 15, 2009): 428–33. http://dx.doi.org/10.1017/s0007114508184719.

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Effects of phytic acid (PA) on ileal mineral and amino acid (AA) digestibilities and ileal endogenous AA flow in piglets were investigated. Seven ileal-cannulated weanling pigs were fed a casein–maize starch-based diet with PA (as sodium phytate) at 0, 5, 10 or 20 g/kg in 4 × 4 Latin square design with three added columns to give seven observations per treatment. The basal diet was formulated to meet National Research Council energy and AA requirements for piglets. The respective digestibility and endogenous lysine loss were determined by indicator and homoarginine methods. The apparent ileal digestibility (AID) of Na, K and P was linearly and quadratically reduced (P < 0·05) by increased dietary PA concentration, whereas that of Ca and Mg was only linearly reduced (P < 0·05) by the dietary PA. The AID values for Mg and Na were negative ( − 0·03 and − 0·18, respectively) when PA was supplemented at 20 g/kg. The AID of isoleucine, leucine and valine responded quadratically to dietary PA concentration, though the differences between the AID values of the AA due to change in dietary PA concentration were marginal (at most by 1·8 percentage units). Furthermore, dietary PA did not affect (P>0·05) endogenous AA losses. The results suggest that PA has limited effect on the digestibility and endogenous losses of AA in piglets, but can reduce AID of Mg and Na partly by increasing endogenous losses of these minerals as evidenced by their negative AID values.
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Fan, Victoria Y., Karen A. Grépin, Gordon C. Shen, and Lucy Chen. "Tracking the flow of health aid from BRICS countries." Bulletin of the World Health Organization 92, no. 6 (June 1, 2014): 457–58. http://dx.doi.org/10.2471/blt.13.132472.

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Geyser, Mariëtte. "CASH FLOW RISK RATIO: AN AID TO MARKETING DECISIONS." Agrekon 39, no. 1 (March 2000): 36–45. http://dx.doi.org/10.1080/03031853.2000.9523565.

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URICH, ANDREW L. "BATTLE OF THE FORMS FLOW CHART: AN INSTRUCTIONAL AID." Journal of Legal Studies Education 9, no. 1 (September 1990): 141–44. http://dx.doi.org/10.1111/j.1744-1722.1990.tb00011.x.

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Carpenter, Chris. "Passive Acoustic Tools Aid Analysis of Sand-Screen Completion." Journal of Petroleum Technology 74, no. 10 (October 1, 2022): 110–12. http://dx.doi.org/10.2118/1022-0110-jpt.

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_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 209030, “Complete Analysis of a Complex Sand-Screen Completion in a Single Run in Hole is Enabled by Combination of Novel Passive Acoustic Tools With Conventional PLT and Caliper Techniques,” by Duncan Troup, SPE, Archer. The paper has not been peer reviewed. _ Wells with sand-control measures may still exhibit the onset of sanding during production, often because of isolated damage to individual screen sections. Positive identification of sand-production location allows targeted mitigation while retaining as much hydrocarbon flow as possible. The complete paper discusses novel acoustic techniques used to identify productive zones and areas of sand production in a well with a sanding event. Digital Signal Processing Most modern tools will perform one or two fast Fourier transforms per second, but the tool design presented in the paper has a very fast sampling rate and completes 220 transforms per second. This allows the output frequency information to be further sampled in statistically meaningful ways to provide three additional noise parameters. The time-filtered noise level is the general, steady-state noise amplitude with outliers removed and generally is used for leak and flow detection. The mean noise level is composed of all data samples and is an indication of the total acoustic energy present. The third parameter, the transient noise level, is an indication of time variability of the received signal and is sensitive to short-lived transient acoustic signals. It is this parameter that is of the most interest in the detection of sand impact, because, by its nature, a sand strike is a transient event. The data generated can be displayed as a variable density log of frequency response against time or logging depth, with the amplitude of each frequency band represented by a color map, and a total noise energy curve may be derived over any frequency range desired. To test the suitability of the signal processing for viable sand discrimination, the background flow noise was increased every 2 minutes and sand particles were drizzled onto the sensor plate for 1 minute of each flow period. When no background flow noise existed, the sand-impact noise shows up well. When flow noise is introduced, the baseline of the noise energy curve is shifted higher but good contrast with the sand signal remains. A further test placed a tool inside a water-filled 5-in. liner section and a stream of water was directed against it (Fig. 1). The rate of water flow was controlled, and sand was introduced at known mass rates up to 1.17 gal/min. The results were plotted as noise energy against fluid velocity for each of the sand mass flow rates. Good correlation exists between the rates of both liquid and sand rates and total energy, and good correlation exists for liquid and sand flow rates. At low liquid flow rate, better discrimination between the rates of sand in the flow is observed, indicating that the full bandwidth transient parameter will provide better resolution when sand and fluid flow rates are low.
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Dissertations / Theses on the topic "Flow aid"

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Shabbir, Muhammad Humas. "Streamlining information and part flow by re-designing process flow to aid root cause analysis." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113727.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (page 63).
Waters Corporation is a world leading analytical instrument manufacturing company, with an overarching goal of achieving and maintaining high product robustness. Analysis of the challenge identifies the problem of lack of root cause analysis. This is further attributed to the inefficient process flow of information and parts: there is a lack of tracking mechanism for parts which is induced from lack of ownership and value at each stage of the root cause analysis phase. A new process flow is designed around the current process to address gaps and inefficiencies. This process flow redesign is done for both information flow for hot parts list and the movement of parts; this will streamline the overall root cause process and secondarily help save cost and eliminate redundancies. A layout improvement solution is developed, and a plan for implementation recommended. The new process flow is designed to increase visual control of the process and to effectively move the material. Each phase of the project has been reviewed and discussed to encourage stakeholder involvement in order to develop a continuous improvement culture.
by Muhammad Humas Shabbir.
M. Eng.
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Houston, Jonas H. "Developing Dendrifrom Facades Using Flow Nets as a Design Aid." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/670.

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This thesis highlights a method of arriving at form that minimizes the need for high end technology and complex mathematical models, yet has structural principles of load flow at the highlighted methods core. Similar to how graphical statics assisted earlier architects and engineers to arrive at form by relating form and forces, this thesis suggests a method of form finding that relates the flow of stresses within solid masses to possible load-bearing façades. Looking to nature, where an abundance of efficient structural solutions can be found, this thesis focuses on a tree-like structural form called the dendriform. In doing so, this thesis explores the idea that through an understanding of typical load flow patterns and the removal of minimally stressed material of the solid body, dendriforms can be revealed that qualitatively exemplify load flow yet maintain an architectural aesthetic.
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Åkesson, Anna. "Hydraulic- hydromorphologic analysis as an aid for improving peak flow predictions." Licentiate thesis, KTH, Vattendragsteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-25425.

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Conventional hydrological compartmental models have been shown to exhibit a high degree of uncertainty for predictions of peak flows, such as the design floods for design of hydropower infrastructure. One reason for these uncertainties is that conventional models are parameterised using statistical methods based on how catchments have responded in the past. Because the rare occurrence of peak flows, these are underrepresented during the periods used for calibration. This implies that the model has to be extrapolated beyond the discharge intervals where it has been calibrated. In this thesis, hydromechanical approaches are used to investigate the properties of stream networks, reflecting mechanisms including stage dependency, damming effects, interactions between tributaries (network effects) and the topography of the stream network. Further, it is investigated how these properties can be incorporated into the streamflow response functions of compartmental hydrological models. The response of the stream network was shown to vary strongly with stage in a non-linear manner, an effect that is commonly not accounted for in model formulation. The non-linearity is particularly linked to the flooding of stream channels and interactions with the flow on flood-plains. An evaluation of the significance of using physically based response functions on discharge predictions in a few sub-catchments in Southern Sweden show improvements (compared to a conventional model) in discharge predictions – particularly when modelling peak discharges. An additional benefit of replacing statistical parameterisation methods with physical parameterisation methods is the possibility of hydrological modelling during non-stationary conditions, such as the ongoing climate change.
QC 20101022
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Miller, Adin T. "Walking Assistant - A Mobile Aid for the Visually-Impaired." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1262.

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The most common navigation aid visually-impaired people employ is a white cane, but, recently, technology has given rise to a varied set of sophisticated navigation aids. While these new aids can provide more assistance to a visually-impaired person than a white cane, they tend to be expensive due to a small market segment, which in turn can reduce their accessibility. In an effort to produce a technologically-advanced yet accessible navigation aid, an Android application is proposed that detects and notifies users about obstacles within their path through the use of a smartphone's camera. While the smartphone is mounted on a harness worn by the user, the Walking Assistant application operates by capturing images as the user walks, finding features of objects within each frame, and determining how the features have moved from image to image. If it is discovered that an object is moving towards the user, the Walking Assistant will activate the smartphone's vibration mode to alert the user to the object's presence. Additionally, the user can control the Walking Assistant through the use of either touch or voice commands. By conducting real-world tests, it was determined that the Walking Assistant can correctly identify obstacles 42.1% of the time, while generating false positive obstacle identifications only 15.0% of the time. The accuracy of the Walking Assistant can be further improved by implementing additional features, such as a fuzzy-decision-based thresholding system or image stabilization.
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Buys, Angela. "Development of a flow cytometric bead immunoassay as an aid to potency evaluation of enterotoxaemia vaccines." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/30924.

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Enterotoxaemia is an economically important disease of sheep, goats and calves. The disease affects mainly young animals aged between four to six months. Enterotoxaemia is caused by systemic effects of the epsilon toxin produced by the anaerobic bacterium Clostridium perfringens Type D. Due to almost certain death of affected animals, there is no form of treatment. The only practical means of controlling the occurrence of enterotoxaemia is to immunize animals through vaccination. The vaccine is prepared by toxoiding the bacterial culture filtrate, and contains a range of proteins in addition to the epsilon toxin. Batches of the vaccine are thus required to be tested for safety, efficacy and potency. The potency of the vaccines is currently tested with the in vivo mouse neutralisation test (MNT). However, due to ethical, economic and technical reasons, alternative in vitro assays are needed. In this study, an indirect cytometric bead immunoassay (I-CBA) was developed for use in vaccine potency testing and the results were compared with those obtained using an indirect ELISA (I-ELISA) and the MNT. To investigate, three groups of eight guinea pigs were immunized with one of three different production batches of the enterotoxaemia vaccine. Guinea pig sera were collected prior to vaccination and at five weeks post-vaccination, and the sera of four guinea pigs per group were pooled to give six test sera. The levels of anti-epsilon toxin antibodies in the respective test sera were subsequently determined using MNT, I-ELISA and I-CBA. The I-CBA assay developed during the course of this study is based on coating of functional beads with purified epsilon toxin that serves to capture anti-epsilon toxin antibodies from the test sera. Following incubation with fluorescein isothiocyanate (FITC)-labelled anti-guinea pig IgG, the samples were analyzed by flow cytometry and the anti-epsilon toxin antibody concentrations were extrapolated from a standard curve using linear curve fitting. Although the intra- and inter-assay variability was satisfactory, epsilon antitoxin levels of the guinea pig test sera determined by both the ICBA and I-ELISA tests were higher than that of the MNT assay which is accepted as the current “gold standard”. Moreover, in contrast to the MNT, all of the serum samples were identified as having antitoxin levels above the required minimum (i.e. not less than 5 U/ml). These results indicate that the respective in vitro tests in their current formats are not yet suitable alternatives to the in vivo MNT. The growing demand for a more humane, cost-effective and efficient method for testing the potency of enterotoxaemia vaccines, however, provides a strong impetus for further optimization and standardization of the I-CBA assay described in this study.
Dissertation (MSc)--University of Pretoria, 2012.
Microbiology and Plant Pathology
MSc
Unrestricted
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Gezimati, Robinson. "Good governance as key to the flow of foreign development aid: the sub-Saharan Africa perspective." Thesis, University Of Cape Town, 2018. http://hdl.handle.net/11427/29947.

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The aim of this study was to evaluate the importance of good governance to the flow of foreign development aid. The researcher used the sub-Saharan Africa region to accomplish the aim of his study. The study examined the extent to which foreign development aid has been targeted at countries with sound governance systems, that is, strong institutions and policies. This study therefore determined whether the flow of foreign development aid in sub-Saharan African developing countries has changed since the endorsement of the “Monterrey Consensus” by targeting those countries with sound economic institutions and policy environments. Empirical and theoretical literature was reviewed on foreign development aid as well as governance systems especially the Ibrahim Index of African Governance (IIAG), which was discussed and used in this study as the governance indicator system. The study’s results and findings were deduced from secondary data which addressed the governance indicators in sub-Saharan Africa for 2010 to 2015, gathered from the IIAG assessment reports of 12 selected sub-Saharan African countries as well as the amount of foreign development aid received by each of the countries during the same period gathered from OECD and World Bank statistics. Additionally, inferential analysis was undertaken using the Spearman’s correlation test as well as a multiple linear regression analysis to establish the relationships and/or impact of the governance indicators on the flow of foreign development aid to sub-Saharan Africa. The study concluded that the combined effect of all the governance indicators have a statistical significant effect on the flow of foreign development aid to developing countries in sub-Saharan Africa. Individually, Participation and Human Rights indicators as well as Sustainable Economic Opportunities indicators have a positive effect or impact on the flow of foreign development aid in sub-Saharan African countries, with Sustainable Economic Opportunities indicators having the highest impact. However, Safety and Rule of Law indicators were discovered to have a negative effect on the flow of foreign development aid in sub-Saharan Africa whilst Human Development indicators were discovered not to have any effect or impact. On the other hand, the study also noted that in further determining allocations funding agencies may consider a country’s Safety and Rule of Law indicators as well as Human Development indicators whilst Participation and Human Rights indicators and Sustainable Economic Opportunity indicators were seen not have any significant effect on determination of funding allocations.
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Svedberg, Anna. "Improvement of the retention-fromation relationship using three-component retention aid systems." Doctoral thesis, KTH, Fiberteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96259.

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Weseman, Brian D. "The Effects of Retention Aid Dosage and Mechanical Energy Dissipation on Fiber Flocculation in a Flow Channel." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7960.

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Formation plays an important role in the end-use properties of paper products, but before formation can be optimized to achieve superior properties, an understanding about the causes of formation must be developed. Formation is caused by variations in the basis weight of paper that are results of fiber floc formation before and during the forming of the sheet. This project is a first step in a larger research program aimed at studying formation. By observing the effects that mechanical energy dissipation (in the form of turbulence) and retention chemical dosage have on floc formation, we may develop a better understanding of how to control formation. In this study, a rectangular cross-section flow channel was constructed to aid in the acquisition of digital images of a flowing fiber suspension. The furnish consisted of a 55:45 spruce:pine bleached market pulp mix from a Western Canadian mill. Turbulence was varied by changing the flow rate; Reynolds numbers achieved range from 20,000 to 40,000. The retention aid used was a cationic polyacrylamide with a medium charge density. Dosage of the retention aid was varied from 0 to 2 pounds per ton OD fiber. Digital images of the flowing fiber suspension were acquired with a professional digital SLR camera with a forensics-quality lens. Three separate image analysis techniques were used to measure the flocculation state of the fiber suspension: morphological image operations, formation number analysis, and fast Fourier transform analysis. Morphological image analysis was capable of measuring floc size increases seen in the acquired floc images. It was shown how floc diameter could increase simultaneously with decreasing total floc area and total floc number. A regression model relating retention aid dosage and energy dissipation was constructed in an effort to predict flocculation. The regression model was used to predict F2 (formation number squared) results from the study. The interaction effect RE was shown to have a differing effect across the retention aid dosage levels. As a result, this model and technique may prove to be a beneficial tool in optimizing retention aid applications.
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Eliasson, Åse. "Groundwater impact assessment and protection." Licentiate thesis, KTH, Civil and Environmental Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1234.

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In the recent decades, therehave been frequent conflicts between groundwater waterresources and environmentally hazardous activities. Newmethodologies for aiding decision-making in groundwater impactassessment and protection areneeded and in which issues ofincreased awareness, better understanding of the groundwaterresources processes, and validation of predictive mathematicalmodels are addressed.

A framework fordecision–aid, based on predictive simulations that a)predicts the environmental impacts b) provides the totaleconomical value c) visualises the impacts and the groundwaterproperties and d) describes the uncertainties in the results isproposed herein. The framework can be applied in environmentalimpact assessments, strategic environmental assessments andprotection and management of water resources. The results ofthe model are used as feedback for determining new scenarios,depending on the required uncertainties, and if the plannedactivity is sustainable, and/or fulfils the legislative andpolicy measures. This framework is applied to a particular casestudy, Nybroåsen, in the south-eastern part of Sweden,where the highway E22 is constructed through the importantglaciofluvial esker aquifer, passing the protection zone of thewater supply for the Kalmar municipality.

The impacts from the new highwayand the existing road have been predicted by two-dimensionalphysically based time-variant flow and solute groundwatermodelling. The results, breakthrough curves of contaminantconcentration in wells and maps of concentration distributions,as well as travel times, flow paths, and capture zones forwells determined by particle tracking have been presented.

The constructed model of theNybroåsen study area was calibrated by comparing observedand simulated groundwater levels for 15 observation wells forten years of measurements. The model has been evaluated bothgraphically and numerically and the calibration target wasfulfilled for 13 of the 15 observation wells. The model workincludes investigations of the catchment information, a waterbalance study, simulation of the groundwater recharge,consideration of the unsaturated zone by a numerical columnsimulation, and sensitivity analysis.

From the sensitivity analysis ofthe flow and transport parameters, it has been shown that theuncertainties are mainly due to the hydraulic conductivity.Comparison of the derived conductivity from the steady-stateautomatic calibration and the time-variant calibration showedthat there are major differences in the derived parameters,which illustrates the importance of a time dependentcalibration over both wet and dry periods and in more than onepoint in the area of interest of the model predictions.

In addition, a multi-criteriadecision analysis has been carried out for four roadalternatives (including the new highway E22) and the existingroad in the case study concerned. The multi-criteria decisionaid is applied as an illustration of how it can be used in thestudy area to identify a) interest groups of actors and theirconcerns b) ranking of alternative road scenarios according toactors’preferences and c) coalition groups of actorsi.e.groups that have similar views with regard to theroad alternatives.

Keywords:Physically-based groundwater modelling,contamination, flow and solute transport, glaciofluvialdeposits, Nybroåsen, Sweden, and multi-criteriadecision-aid.

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Miclo, Romain. "Challenging the "Demand Driven MRP" Promises : a Discrete Event Simulation Approach." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2016. http://www.theses.fr/2016EMAC0016/document.

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Les principaux enjeux des supply chain d’aujourd’hui concernent l’adaptation à des environnements instables. Demand Driven Material Requirements Planning (DDMRP) est une méthode récente et prometteuse de gestion des flux qui a été conçue pour faire face aux problématiques actuelles. Le travail de recherche réalisé détaille et positionne DDMRP par rapport aux autres méthodes connues de pilotage de flux. Le but de ce travail est de challenger les principales promesses de DDMRP. Pour cela, un plan d’expériences a été réalisé sur un cas d’étude pour évaluer le comportement de MRP II, Kanban et DDMRP face à différentes sources de variabilité. Le dimensionnement des buffers DDMRP est un sujet majeur pour la méthode. Il a été traité sur un cas d’étude avec un travail d’optimisation. Toutes les contributions ont été expérimentées avec l’implémentation de DDMRP sur un cas réel. La thèse permet ainsi de valider certains atouts de DDMRP, tels que l’adaptation du système à différentes formes de variabilités, mais elle permet également de souligner des perspectives majeures de recherche sur ce sujet
The main Supply Chain current issues concern the adaptation to unstable environments. Demand Driven Material Requirements Planning (DDMRP) is a recent and promising material management method that is designed to tackle these current issues. The research work details and classifies DDMRP compared to the other material management methods known. The goal of this work is to challenge the main DDMRP promises. This is why a design of experiments was realised on a case study in order to assess MRP II, Kanban and DDMRP behaviours with different variability sources. The DDMRP buffer sizing is a major issue. It was dealt with an optimisation work on a case study. All the contributions were experimented with a DDMRP implementation on a real case. The research work enables several DDMRP advantages to be validated, such as the system adjustment to different variability sources, however this work also allows research perspectives to be underlined
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Books on the topic "Flow aid"

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M, Clifford J., ed. International aid: The flow of public resources from rich to poor countries. New Brunswick, N.J: AldineTransaction, 2006.

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The future of bilateral aid in Africa: Size, flow, conditionalities, and relative importance in countries' budget. Harare, Zimbabwe: African Capacity Building Foundation, 2010.

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Plett, E. G. Open ended shock tube flow as a tool to aid development of a two-dimensional compressible nonsteady computer code. New York: AIAA, 1986.

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Edwards, Charles J. How federal funds flow to local schools: An explanation of the formula grant allocation process. Arlington, VA: Education Funding Research Council, 1992.

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Office, General Accounting. Traffic congestion: Federal efforts to improve mobility : report to the chairman, Subcommittee on Transportation and Related Agencies, Committee on Appropriations, U.S. Senate. Washington, D.C: The Office, 1989.

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Relieving highway congestion through capacity enhancements and increased efficiency: Hearing before the Subcommittee on Highways and Transportation [i.e Transit] of the Committee on Transportation and Infrastructure, House of Representatives, One Hundred Seventh Congress, second session, May 21, 2002. Washington: U.S. G.P.O., 2002.

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Chang, Charles C. Measuring aid flows: A new approach. Washington, DC: World Bank, Development Research Group, Macroeconomics and Growth, 1999.

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Harris, Mollie. Where the Windrush flows, and will forever flow. Gloucester: Sutton, 1989.

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Office, General Accounting. Traffic congestion: Trends, measures, and effects. Washington, D.C: U.S. General Accounting Office, 1989.

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Office, General Accounting. Traffic congestion: Activities to reduce travel demand and air pollution are not widely implemented : report to congressional requesters. Washington, D.C: The Office, 1992.

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Book chapters on the topic "Flow aid"

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Wallace, Tina, Lisa Bornstein, and Jennifer Chapman. "The major UK donors and the flow of aid through the NGO sector." In The Aid Chain, 49–72. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 2006. http://dx.doi.org/10.3362/9781780440019.004.

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Sharma, S. K. "Regional Heat Flow: An Aid to Geothermal Exploration in Chattisgarh, India." In Uranium in the Aquatic Environment, 945–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-55668-5_111.

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Bippes, H., M. Wiegel, and F. Bertolotti. "Experiments on the Control of Crossflow Instability with the Aid of Suction Through Perforated Walls." In IUTAM Symposium on Mechanics of Passive and Active Flow Control, 165–70. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4199-4_27.

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Bridge, P. D. "Flow Micro-fluorimetry as an Aid to DNA Determinations in the Genus Penicillium." In Biodeterioration 7, 679–82. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1363-9_88.

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Lukefahr, Steven D., James I. McNitt, Peter R. Cheeke, and Nephi M. Patton. "Economics and financial management." In Rabbit production, 83–88. 10th ed. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781789249811.0006.

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Abstract This chapter aims to ensure that prospective rabbit raisers enter the business fully aware of the financial limitations and to emphasize the procedures that might aid in attaining financial success. Sections of this chapter cover the financing, expenses, income and cash flow of rabbit enterprises.
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Pravin, Patil, Sharma Satish, and Jain Satish. "Modelling Copper Omega Type Coriolis Mass Flow Sensor with an Aid of ANFIS Tool." In Advances in Intelligent and Soft Computing, 131–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20505-7_11.

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Colchester, A. C. F., D. J. Hawkes, J. N. H. Brunt, G. H. du Boulay, and A. Wallis. "Pulsatile Blood Flow Measurements with the Aid of 3-D Reconstructions From Dynamic Angiographic Recordings." In Information Processing in Medical Imaging, 247–65. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4261-5_19.

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Rathanasamy, Rajasekar, Yogeswaran Baskar, Vinith Ravichandran, Rohit Kannan, and Santhosh Sivaraj. "Prevention of Reversal Blood Flow Phenomenon into Intravenous Line with the Aid of Smart Device." In Lecture Notes in Mechanical Engineering, 391–401. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4147-4_40.

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Abramo, Antonio. "Flow Chart for Treatment: A Standardized Treatment Program as an Aid in Primary Treatment of Distal Radius Fractures." In Distal Radius Fractures, 105–7. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54604-4_13.

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Zischka, Hans, Josef Lichtmannegger, Nora Jägemann, Luise Jennen, Daniela Hamöller, Evamaria Huber, Axel Walch, Karl H. Summer, and Martin Göttlicher. "Isolation of Highly Pure Rat Liver Mitochondria with the Aid of Zone-Electrophoresis in a Free Flow Device (ZE-FFE)." In Methods in Molecular Biology™, 333–48. Totowa, NJ: Humana Press, 2008. http://dx.doi.org/10.1007/978-1-60327-064-9_26.

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Conference papers on the topic "Flow aid"

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Burkhart, Brenda J., and Marc E. Fusco. "Using animation to aid process flow visualization." In Conference companion. New York, New York, USA: ACM Press, 1996. http://dx.doi.org/10.1145/257089.257108.

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Abbott, David, Shane Dunn, and Nichole Gassien. "Refraction Seismic Tomography - Aid in Groundwater Flow Modelling." In 19th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2006. http://dx.doi.org/10.3997/2214-4609-pdb.181.122.

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Abbott, David, Shane Dunn, and Nichole Gassien. "Refraction Seismic Tomography‐Aid in Ground Water Flow Modeling." In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2006. Environment and Engineering Geophysical Society, 2006. http://dx.doi.org/10.4133/1.2923577.

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Goharzadeh, Afshin, and Peter Rodgers. "Experimental Characterization of Slug Flow Velocity Distribution in Two Phase Pipe Flow." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11201.

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This paper presents an experimental study of gas-liquid slug flow inside a horizontal pipe. The influence of air bubble passage on liquid flow is characterized using Particle Image Velocimetry (PIV) combined with Refractive Index Matching (RIM) and fluorescent tracers. A physical insight into the velocity distribution within slug flow is presented. It was observed that the slug flow significantly influences the velocity profile in the liquid film. Measured velocity distributions also revealed a significant drop in the velocity magnitude immediately upstream of the slug nose. These findings aim to aid an understanding of the mechanism of solid transportation in slug flows.
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Carstensen, C. "Supression of Slug Flow With the Aid of New Equipment." In Offshore Technology Conference. Offshore Technology Conference, 1989. http://dx.doi.org/10.4043/6100-ms.

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Dudley, Scott P., Tommy B. Hoover, and Robert E. Barry. "Optical Methods Aid for Visualization of Convective Heat Flow Patterns." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1994. http://dx.doi.org/10.4271/940503.

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Ghiduk, Ahmed S., Mary Jean Harrold, and Moheb R. Girgis. "Using Genetic Algorithms to Aid Test-Data Generation for Data-Flow Coverage." In 14th Asia-Pacific Software Engineering Conference (APSEC'07). IEEE, 2007. http://dx.doi.org/10.1109/aspec.2007.73.

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Ghiduk, Ahmed S., Mary Jean Harrold, and Moheb R. Girgis. "Using Genetic Algorithms to Aid Test-Data Generation for Data-Flow Coverage." In 14th Asia-Pacific Software Engineering Conference (APSEC'07). IEEE, 2007. http://dx.doi.org/10.1109/apsec.2007.100.

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Weiss, Alexander, Sylvester Abanteriba, and Thomas Esch. "Investigation of Flow Separation Inside a Conical Rocket Nozzle With the Aid of an Annular Cross Flow." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37387.

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Flow separation is a phenomenon that occurs in all kinds of supersonic nozzles sometimes during run-up and shut-down operations. Especially in expansion nozzles of rocket engines with large area ratio, flow separation can trigger strong side loads that can damage the structure of the nozzle. The investigation presented in this paper seeks to establish measures that may be applied to alter the point of flow separation. In order to achieve this, a supersonic nozzle was placed at the exit plane of the conical nozzle. This resulted in the generation of cross flow surrounding the core jet flow from the conical nozzle. Due to the entrainment of the gas stream from the conical nozzle the pressure in its exit plane was found to be lower than that of the ambient. A Cold gas instead of hot combustion gases was used as the working fluid. A mathematical simulation of the concept was validated by experiment. Measurements confirmed the simulation results that due to the introduction of a second nozzle the pressure in the separated region of the conical nozzle was significantly reduced. It was also established that the boundary layer separation inside the conical nozzle was delayed thus allowing an increased degree of overexpansion. The condition established by the pressure measurements was also demonstrated qualitatively using transparent nozzle configurations.
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Shepard, Thomas, and Aleksey Garbaly. "Experimental Investigation of Choked Flow Conditions for Bubbly Flow." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5225.

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Abstract In an effervescent atomizer, a bubbly two-phase mixture flows through a convergent section before exhausting from an exit orifice. It is commonly believed that one of the key effects of including bubbles is in the substantial decrease in the speed of sound experienced by the two-phase flow allowing for choked flow conditions at the exit. The existence of choked conditions would result in under-expanded bubbles that would further expand upon exiting the atomizer and provide additional forces to aid in the break-up of the bulk liquid into droplets. This study examines how the homogenous two-phase flow model of speed of sound, and thus critical conditions, compare with experiments in order to better understand the fundamental physics of effervescent atomization. In these experiments, an effervescent atomizer is connected to a vacuum chamber allowing for internal atomizer pressure, liquid flow rate and air flow rate to be monitored as the post-exit pressure is decreased. Experiments reveal that the flow remains subcritical well beyond conditions that the homogenous flow theory might predict being choked. High-speed imaging is used to capture internal atomizer bubble size.
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Reports on the topic "Flow aid"

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Schulson, Erland M. The Flow and Fracture of Cracked Ice: Experiments to Aid Modeling. Fort Belvoir, VA: Defense Technical Information Center, September 1997. http://dx.doi.org/10.21236/ada628764.

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Schulson, Erland M. The Flow and Fracture of Cracked Ice: Experiments to Aid Modeling. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada619286.

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Vernon, Christopher R., Evan V. Arntzen, Marshall C. Richmond, R. A. McManamay, Timothy P. Hanrahan, and Cynthia L. Rakowski. GIS Framework for Large River Geomorphic Classification to Aid in the Evaluation of Flow-Ecology Relationships. Office of Scientific and Technical Information (OSTI), February 2013. http://dx.doi.org/10.2172/1079745.

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McKay, S. Is mean discharge meaningless for environmental flow management? Engineer Research and Development Center (U.S.), September 2022. http://dx.doi.org/10.21079/11681/45381.

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River ecosystems are highly dependent on and responsive to hydrologic variability over multiple time scales (e.g., hours, months, years). Fluctuating river flows present a key challenge to river managers, who must weigh competing demands for freshwater. Environmental flow recommendations and regulations seek to provide management targets balancing socio-economic outcomes with maintenance of ecological integrity. Often, flow management targets are based on average river conditions over temporal windows such as days, months, or years. Here, three case studies of hydrologic variability are presented at each time scale, which demonstrate the potential pitfalls of mean-based environmental flow criteria. Each case study shows that the intent of the environmental flow target is not met when hydrologic variability is considered. While mean discharge is inadequate as a single-minded flow management target, the consequences of mean flow prescriptions can be avoided in environmental flow recommendations. Based on these case studies, a temporal hierarchy of environmental flow thresholds is proposed (e.g., an instantaneous flow target coupled with daily and monthly averages), which would improve the efficacy of these regulations.
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Dou, Winston Wei, Leonid Kogan, and Wei Wu. Common Fund Flows: Flow Hedging and Factor Pricing. Cambridge, MA: National Bureau of Economic Research, July 2022. http://dx.doi.org/10.3386/w30234.

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Cram, Jana, Mary Levandowski, Kaci Fitzgibbon, and Andrew Ray. Water resources summary for the Snake River and Jackson Lake Reservoir in Grand Teton National Park and John D. Rockefeller, Jr. Memorial Parkway: Preliminary analysis of 2016 data. National Park Service, June 2021. http://dx.doi.org/10.36967/nrr-2285179.

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This report summarizes discharge and water quality monitoring data for the Snake River and Jackson Lake reservoir levels in Grand Teton National Park and John D. Rockefeller, Jr. Memorial Parkway for calendar year 2016. Annual and long-term discharge summaries and an evaluation of chemical conditions relative to state and federal water quality standards are presented. These results are considered provisional, and may be subject to change. River Discharge: Hydrographs for the Snake River at Flagg Ranch, WY, and Moose, WY, exhibit a general pattern of high early summer flows and lower baseflows occurring in late summer and fall. During much of 2016, flows at the Flagg Ranch monitoring location were similar to the 25th percentile of daily flows at that site. Peak flows at Flagg Ranch were similar to average peak flow from 1983 to 2015 but occurred eleven days earlier in the year compared to the long-term average. Peak flows and daily flows at the Moose monitoring station were below the long-term average. Peak flows occurred four days later than the long-term average. During summer months, the unnatural hydro-graph at the Moose monitoring location exhibited signs of flow regulation associated with the management of Jackson Lake. Water Quality Monitoring in the Snake River: Water quality in the Snake River exhibited seasonal variability over the sampling period. Specifically, total iron peaked during high flows. In contrast, chloride, sulfate, sodium, magnesium, and calcium levels were at their annual minimum during high flows. Jackson Lake Reservoir: Reservoir storage dynamics in Jackson Lake exhibit a pattern of spring filling associated with early snowmelt runoff reaching maximum storage in mid-summer (on or near July 1). During 2016, filling water levels and reservoir storage began to increase in Jackson Lake nearly two weeks earlier than the long-term average and coincident with increases in runoff-driven flows in the Snake River. Although peak storage in Jackson Lake was larger and occurred earlier than the long-term average, minimum storage levels were similar to the long-term average.
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Herbert, Thorwald. Graphics Workstation for Studies of Flows and Flow Control. Fort Belvoir, VA: Defense Technical Information Center, May 1996. http://dx.doi.org/10.21236/ada310044.

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Hammack, E., and Morgan Johnston. Three-dimensional numerical model study of flow near a scour hole in Isle of Wight Bay near Ocean City, Maryland. Engineer Research and Development Center (U.S.), April 2022. http://dx.doi.org/10.21079/11681/43921.

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A scour hole has developed in Isle of Wight Bay near Ocean City, MD. This hole could grow to the point that nearby land developments are threatened, so channel-bed protection measures may be implemented near this scour hole. Appropriately designing those bed protection measures requires knowledge of the flow behavior in the scour hole, so a three-dimensional model study has been conducted to determine the flow behavior at the extreme flood and ebb tides present during a pre-selected month of tide cycles. Steady-state simulations of the flows during those two tide conditions have been completed. Contour plots of the flow velocity near the bed and the corresponding bed shear stresses are provided as input for the design of the bed protection measures.
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Tremblay, T., and M. Lamothe. New contributions to the ice-flow chronology in the Boothia-Lancaster Ice Stream catchment area. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/331062.

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Within the Boothia-Lancaster Ice Stream (BLIS) catchment area, ice flow patterns were reconstructed based on the synthesis of striation directions and cross-cutting relationships, transport patterns of erratic boulders, glacial landforms, cold-based glacial landsystems, and ice-retreat chronology. New ArcticDEM data, high-definition satellite imagery and multibeam echosounder bathymetric datasets provided increased details on ice flow indicators. Convergent high-velocity ice flows through the BLIS main axis were major, persistent features in the northeastern Laurentide Ice Sheet through the last glaciation, and this study highlights intensity fluctuations and ice flow pattern variations that occurred during that time. Highly contrasting glacial geomorphology, notably in the abundance of moraines, reflects marked differences in ice-margin retreat rates and patterns during deglaciation between the western and eastern sides of the BLIS.
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Whitelaw, J. H. Flow and Turbulence Characteristics of Separated Flows with Active Control. Fort Belvoir, VA: Defense Technical Information Center, May 1998. http://dx.doi.org/10.21236/ada348989.

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