103 research outputs found
Lagrangian dynamics of turbulent Rayleigh-Benard convection
No full textU of I Only Restriction Lifted for Item 112217 on 2021-08-24T09:15:10Z.This thesis focuses on laboratory experiments of turbulent Rayleigh Benard convection. Emphasis is placed on describing the Lagrangian dynamics of thermally-strati ed flows at Rayleigh numbers Ra = 2.8*10^9 and 1.1*10^10 for aspect ratios of 1.2, and 2. For this purpose, three-dimensional particle tracking velocimetry (3D-PTV) was used to characterize the three-dimensional Lagrangian paths of tracer particles in RB. The work also provides a general methodology for data pre-processing along with flow data post-processing. Lagrangian statistics including velocity and acceleration possibility density functions as well as pair dispersion are explored in detail. Inspection of the dynamics of buoyant particles, namely bubbles, are also discussed.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-05-01The student, Shikun Shen, accepted the attached license on 2019-04-25 at 11:27.The student, Shikun Shen, submitted this Thesis for approval on 2019-04-25 at 11:36.This Thesis was approved for publication on 2019-04-25 at 17:05.DSpace SAF Submission Ingestion Package generated from Vireo submission #13910 on 2019-08-22 at 15:08:37Made available in DSpace on 2019-08-23T20:36:12Z (GMT). No. of bitstreams: 2
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Previous issue date: 2019-04-25Embargo set by: Seth Robbins for item 112217
Lift date: 2021-08-23T20:36:18Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD syste
Meier Shfeyah signing ceremony
No full textThe Meir Shfeyah Youth Village was founded following World War One as an orphanage for girls. Boys were accepted shortly thereafter. Located in the Jewish colony of Meir Shfeyah, near Zikron Ya’akov, the facility was situated on the site of previous youth facilities. The American Jewish Joint Distribution Committee, or JDC, funded the orphanage through its Palestine Orphan Committee until 1925 when Junior Hadassah, a division of Hadassah for young, unmarried women, took over the responsibility after several years of supporting individual orphans. Meir Shfeyah Youth Village, alternately known as Meir Shfeyah Children's Village, became Junior Hadassah’s largest fundraising project. Junior Hadassah financed the institution’s expenses for three decades until turning over primary responsibility to the State of Israel’s Department of Agriculture in 1958. Although Junior Hadassah merged with other Hadassah divisions in 1967, Hadassah continued to provide support to the Meir Shfeyah Youth Village, which still exists today as a residential, comprehensive high school with an agricultural focus.Hadassah National President Miriam Freund signing a contract for the shikun [housing] at Meier ShfeyahDigital imageDigital finding aid
Using phospholipids to reduce intracellular cholesterol accumulation in npc1 deficiency
No full textNiemann-Pick type C (NPC) disease is a rare genetic disorder caused by mutations in the NPC1 or NPC2 genes, leading to abnormal intracellular cholesterol accumulation in late endosomes/lysosomes (LE/LY) that ultimately cause cells to fail and causes neurological symptoms in children and teenagers. Exogenous enrichment with lysobisphosphatidic acid (LBPA), also known as bis-monoacylglycerol phosphate or BMP, either directly or via the LBPA precursor phosphatidylglycerol (PG), has been shown to reduce LE/LY cholesterol accumulation and has been investigated as a potential therapeutic intervention in NPC disease. Here we report the effects of stereoisomer configuration and acyl chain composition of LBPA on cholesterol clearance in NPC1-deficient cells. We find that S,R, S,S, and S,R LBPA stereoisomers behaved similarly, with all 3 compounds leading to comparable reductions in cholesterol accumulation in two NPC1-deficient human fibroblast cell lines. Examination of several LBPA molecular species containing one or two mono- or polyunsaturated acyl chains showed that all LBPA species containing one 18:1 chain significantly reduced cholesterol accumulation, whereas the shorter chain saturated species di-14:0 LBPA had little effect on cholesterol clearance in NPC1 deficient cells. Since cholesterol accumulation in NPC1 deficient cells can also be cleared by PG incubation, we used non-hydrolyzable PG analogues to determine whether conversion to LBPA is required for sterol clearance, or whether PG itself is effective. The results showed that non-hydrolyzable PG species were not appreciably converted to LBPA and showed virtually no cholesterol clearance efficacy in NPC1 deficient cells, supporting the notion that LBPA is the active agent promoting cholesterol clearance from the LE/LY. In summary, the stereoisomers have no effect and the size (chain length) of LBPA have effect on cholesterol clearance in NPC1-/- cells, these studies are helping to define the molecular requirements for potential therapeutic use of LBPA as an option for addressing NPC disease.M.S.Includes bibliographical reference
Research progress of siloxane removal from biogas
No full textSiloxanes in biogas are detrimental to engine, turbine, fuel cell, etc., thus it is necessary to remove siloxanes from biogas before biogas high-value utilization. At present, there are few domestic researches and related reports in view of siloxanes removal from biogas. This paper introduces the property of siloxanes as well as sampling and analysis method, and then presents the research progress of siloxanes removal from biogas. Three commercial technologies overseas are adsorption, absorption and cryogenic condensation. Among them, adsorption on activated carbon is the most widely used method. Other technologies, such as biological removal, catalytic processes, membranes, source controlling, etc. are under exploration and development. At last, this paper summarizes the advantages and disadvantages of siloxanes removal technologies as well as the applicability and analyzes the future research trend and emphasis. This paper could provide a reference in the field of biogas high-value utilization
Complex Event Processing in RFID Middleware: A Three Layer Perspective
No full textIn this paper, we introduce a mechanism of using complex event processing technology to process high level business logic of RFID application. Based on our RFID middleware prototype PKU RFID Edge Server (PRES), we present a three-layer perspective for complex event processing in RFID middleware according to principle of "Separation of Concerns". We propose Petri net based models for each layer: logic structure, temporal constraint and event detection. Event operators are reconsidered based on net structure and given a universal definition, which server as a solid guidance for implementation of complex event processing engine in RFID middleware.Computer Science, Hardware & ArchitectureComputer Science, Information SystemsEngineering, Electrical & ElectronicEICPCI-S(ISTP)
A field study on acceptability of 4-in-1 biogas systems in Liaoning Province, China
No full textAbstractChina plays a leading role in the development and dissemination of household biogas technology. One such technology is the 4-in-1 biogas system, which has been promoted and implemented in colder regions of China. A survey on the acceptability of 4-in-1 biogas systems in two townships in Liaoning Province was undertaken in July, 2010. The purpose of the survey was to clarify the status of these 4-in-1 biogas systems and to learn more about local people's attitude and behavior towards them. This study looked specifically at the economic, social, technical, and environmental aspects of these systems. This study will discuss the advantages as well as the challenges that these systems currently face. From this survey, slurry is more easily accepted and used than biogas is. Farmers are neural towards the sanitation condition of the pigsty and toilet. Breeding pigs is becoming less common, which may restrict the expansion of 4-in-1 biogas systems. The greenhouse aspect of the system greatly supports the farmer's crops, which brings considerable more income to farmers. While the environmental benefits of 4-in-1 biogas systems are often promoted, the economic incentive is a much stronger motivator for farmers. The awareness and promotion of the multipurpose benefits of biogas need to be further popularized
A Lightweight Process Mashup Approach Based on Business Unit
No full textTraditional business process orchestration methods (e.g., service composition and workflow) are usually based on server-side middleware techniques and performed in a rigid development process that requires professional skills. As an emerging technology, mashup helps to move Web 2.0 into enterprises and leverage SOA investments, enabling end-users to draw upon contents, presentation or functionality logic from separated Web sources to create innovative applications. In this paper, we propose a lightweight process mashup approach. The fundamental principle of our approach is encapsulating business activities as browser-side components, and orchestrating them based on the event-driven Publish/Subscribe communication paradigm. The component model is named BU (Business Unit), representing basic blocks in business process mashups. Based on BU, the approach leverages the concept of composite event to define complex process behavior on browser side, and consequently hides classic process constructs like conditional branching and looping, allowing end-users to create articulated business processes in a lightweight fashion.Computer Science, Hardware & ArchitectureEngineering, Electrical & ElectronicEICPCI-S(ISTP)
A process mashup model based on complex event processing
No full textUnder the Web 2.0 circumstances that applications are usually constructed "on the fly" for some transient or personal needs by integrating existing services and information, the complexity and overhead of Web services models and service composition become a problem. As an emerging Web 2.0 technology, mashup enables end-users to integrate separated Web sources to create innovative applications. However, today's researches on mashup primarily focus on data integration and presentation integration instead of business process. This paper proposes a process mashup model based on complex event processing, which leverages event-driven Publish/Subscribe communication paradigm to orchestrate browser-side components. The model also provides a definition language of composite events to help end-users to define the process behavior, and consequently shields them from traditional process constructs like conditional branching and looping, allowing them to create articulated business processes in a lightweight fashion.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000325086200036&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Computer Science, Artificial IntelligenceComputer Science, Information SystemsComputer Science, Interdisciplinary ApplicationsEICPCI-S(ISTP)
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