A k-partite assignment problem

Narula, Subhash C.; Ogbu, Ugonnaya

doi:10.1016/0305-0483(80)90048-1

Cited by 5 publications

(7 citation statements)

References 3 publications

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“…In the process of homogeneous nucleation, the molecules randomly diffuse throughout the solution, meet, and coalesce into the newly formed particle in the interior of the liquid; in contrast, in the process of heterogeneous nucleation, the new molecules selectively rely on the heterogeneous nucleation sites and gradually grow and transform into crystals. 25,26 Both the in situ growth of metal oxides and metals can provide enough energy to overcome the nucleation energy (ΔG*), which depends on the interfacial energy of the metals formed in the reaction medium. 25 The homogeneous nucleation and heterogeneous nucleation in certain systems can be related by their nucleation energy:…”

Section: Mechanisms Of In Situ Growth Of Metal Oxides and Metalsmentioning

confidence: 99%

“…25,26 Both the in situ growth of metal oxides and metals can provide enough energy to overcome the nucleation energy (ΔG*), which depends on the interfacial energy of the metals formed in the reaction medium. 25 The homogeneous nucleation and heterogeneous nucleation in certain systems can be related by their nucleation energy:…”

Section: Mechanisms Of In Situ Growth Of Metal Oxides and Metalsmentioning

confidence: 99%

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Methodology for Robust Superhydrophobic Fabrics and Sponges from In Situ Growth of Transition Metal/Metal Oxide Nanocrystals with Thiol Modification and Their Applications in Oil/Water Separation

Wang

et al. 2013

ACS Appl. Mater. Interfaces

265

161

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Solid surfaces possessing both superhydrophobic and superoleophilic properties have attracted significant interest in fundamental investigations and potential applications in the fields of self-cleaning surfaces, oil/water separation, and microfluidic channels. In this paper, a general methodology for robust superhydrophobic fabrics and sponges was proposed via the in situ growth of both transition-metal oxides and metallic nanocrystals, including the simple neutralization reaction and oxidation-reduction reaction. The porous surfaces coated with Group VIII and IB nanocrystals (such as Fe, Co, Ni, Cu, and Ag) can not only present multiscale surface roughness, but also readily coordinate with thiols, leading to special wettability. In our previous work, it has been confirmed that the interaction between the nanocrystals and thiols plays a significant role in the introduction of hydrophobic ingredients. In this work, it has been demonstrated that the efficient control of the nucleation and growth of Group VIII and IB nanocrystals on the porous surfaces becomes the key factor in the formation of multiscale surface roughness, resulting in the achievement of controllable special wettability. In addition, these as-prepared superhydrophobic and superoleophilic fabrics and sponges were successfully used for application in oil/water separation.

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Section: Mechanisms Of In Situ Growth Of Metal Oxides and Metalsmentioning

confidence: 99%

Section: Mechanisms Of In Situ Growth Of Metal Oxides and Metalsmentioning

confidence: 99%

Methodology for Robust Superhydrophobic Fabrics and Sponges from In Situ Growth of Transition Metal/Metal Oxide Nanocrystals with Thiol Modification and Their Applications in Oil/Water Separation

Wang

et al. 2013

ACS Appl. Mater. Interfaces

265

161

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“…No new crystalline phase is observed after calcining ceria−alumina or lanthana−ceria−alumina samples at 900 °C. Incorporation of alkaline earths in alumina from heterometallic alkoxides has also been investigated . The mechanism of the hydrolysis of heterometallic alkoxides is not well understood, although current studies suggest that bridging alkoxy groups are replaced with hydroxy groups in the early stages of hydrolysis …”

Section: Automotive Catalystsmentioning

confidence: 99%

Materials Chemistry Issues Related to Advanced Materials Applications in the Automotive Industry

et al. 1996

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The driving force behind the research on advanced materials has largely been aerospace and defense applications. In such applications the customer-induced limitations and infrastructural economic factors are secondary to the application-oriented parameters. Automobiles, on the other hand, represent the primary consumers of advanced materials in civilian applications. Automobiles are high-technology, low-cost machines which need to be robust for various climatic conditions and driver behavior. Advanced materials play an important role in the design and fabrication of various components of automobiles, and the use of new materials continues to increase. Recent interest in developing highly fuel efficient vehicles with low emissions has focused efforts toward materials, designs, and devices and is spurring research into advanced materials for weight reduction. The goal is to achieve fuel efficiency by weight reduction and a more efficient powertrain. In this review article, we summarize the efforts of the 1970s and the 1980s on the development of ceramic gas turbine engines with emphasis on materials processing and properties. This is followed by a discussion of metal-matrix composites and reinforced plastics, the structural materials of current interest. The materials issues related to automotive exhaust reduction catalysts are discussed since materials continue to play an important role in designing catalysts to meet the new EPA regulations. The understanding of materials chemistry is expected to play an important role in designing new materials and developing new processes that can be used economically to mass produce vehicle components. We also summarize reports based on ceramic precursor technology and sol-gel processes that show promise in the fabrication of automotive components.

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“…The reliability of the instrument therefore has room for improvement. However, because the questionnaire's items had only 5 or fewer variables, overall instrument reliability is quite good [22].…”

Section: Reliability Checkmentioning

confidence: 99%

“…Assignment problem formulations date back to the mid-1950s [8] I l l ] [I91 [29] [30] and continue to appear in the literature [22] [27] [26] [20]. A search of the literature reveals four different approaches to assignment problems: random assignment, heuristic assignment, free-market assignment, and optimal algorithm assignment.…”

Section: Introductionmentioning

confidence: 99%

Education DEVELOPMENT AND VALIDATION OF A TOOL FOR ASSIGNING STUDENTS TO GROUPS FOR CLASS PROJECTS*

Beheshtian-Ardekani

Mahmood

1986

Decision Sciences

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Group project work is an integral part of many university courses. Assigning students to project groups can be difficult because of the students' diverse backgrounds. Many instructors therefore decide not to assign group projects. This paper develops and validates an instrument that assigns both experienced and inexperienced students to different project groups, thereby creating a balanced, fair environment. The instrument is checked for reliability and validity and then is used to assign students to different project groups. Based on group performance, the end-of-the-semester results also are provided. Path analysis is used to test a causal model. Conclusions and implications for future research are presented.

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A k-partite assignment problem

Cited by 5 publications

References 3 publications

Methodology for Robust Superhydrophobic Fabrics and Sponges from In Situ Growth of Transition Metal/Metal Oxide Nanocrystals with Thiol Modification and Their Applications in Oil/Water Separation

Methodology for Robust Superhydrophobic Fabrics and Sponges from In Situ Growth of Transition Metal/Metal Oxide Nanocrystals with Thiol Modification and Their Applications in Oil/Water Separation

Materials Chemistry Issues Related to Advanced Materials Applications in the Automotive Industry

Education DEVELOPMENT AND VALIDATION OF A TOOL FOR ASSIGNING STUDENTS TO GROUPS FOR CLASS PROJECTS*

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