1,215 research outputs found
Liftings for noncomplete probability spaces
No full textThe current state of knowledge concerning liftings for noncomplete probability spaces is discussed. This is a somewhat expanded version of the author's talk given at the 1991 Summer Conference on General Topology and Applications in Honor of Mary Ellen Rudin and Her Work.PT: S; CR: BURKE MR, IN PRESS P AM MATH S BURKE MR, 1991, ISRAEL J MATH, V73, P33 BURKE MR, 1992, ISRAEL J MATH, V79, P289 CARLSON T, THEOREM LIFTING CHRISTENSEN JPR, 1974, TOPOLOGY BOREL STRUC FREMLIN DH, 1989, HDB BOOLEAN ALGEBRAS, P877 INOESCUTULCEA A, 1966, 5TH P BERK S MATH ST, V2 IONESCUTULCEA A, 1967, CONTRIBUTIONS PROB 1, P63 IONESCUTULCEA A, 1969, TOPICS THEORY LIFTIN JECH TJ, 1978, SET THEORY JOHNSON RA, 1980, P AM MATH SOC, V80, P234 JUST W, IN PRESS T AM MATH S KUPKA J, 1983, INDIANA U MATH J, V32, P717 LOSERT V, 1983, LNM, V1080, P95 MAHARAM D, 1958, P AM MATH SOC, V9, P987 SHELAH S, 1983, ISRAEL J MATH, V45, P90 TALAGRAND M, 1982, P AM MATH SOC, V84, P379 VONNEUMANN J, 1931, CRELLES J MATH, V165, P109; NR: 18; TC: 0; J9: ANN N Y ACAD SCI; PG: 4; GA: BZ86BSource type: Electronic(1
The capacitated lot-sizing and energy efficient single machine scheduling problem with sequence dependent setup times and costs in a closed-loop supply chain network
No full textIn this paper, the capacitated lot-sizing and scheduling problem with sequence dependent setup times and costs in a closed loop supply chain is addressed. The system utilizes the closed-loop supply chain strategy so that the multi-class single-level products are produced through both manufacturing of raw materials and remanufacturing of returned recovered products. In this system, a single machine with a limited capacity in each time period is used to perform both the manufacturing and remanufacturing operations. The sequence-dependent setup times and costs (both between two lots of products of different classes and between two lots belonging to the same class of products produced through different methods) are considered. A large-bucket mixed integer programming formulation is proposed for the problem. This model minimizes not only the manufacturing and remanufacturing costs, the setup costs and the inventory holding and backlogging costs over the planning horizon, but also the energy costs paid for the utilization of machine and the compression of processing times. Since the problem is NP-hard, a matheuristic and a grey wolf optimization algorithm are proposed to solve it. To evaluate the efficiency of the proposed algorithm, some experimental instances are generated and solved. The obtained results show the effectiveness of the proposed algorithms.</p
A Diploid Evolutionary Algorithm for Sustainable Truck Scheduling at a Cross-Docking Facility
No full textSupply chains have become more time-sensitive in recent years. Delays in supply chain operations may cause significant negative externalities, including lost sales and customers. In order to facilitate the product distribution process within supply chains, reduce the associated delays, and improve sustainability of the supply chain operations, many distribution companies started implementing the cross-docking technique. One of the challenging problems in management of the cross-docking facilities is efficient scheduling of the arriving trucks. This study proposes a novel Diploid Evolutionary Algorithm for the truck scheduling problem at a cross-docking facility, which—unlike the Evolutionary Algorithms presented in the cross-docking literature to date—stores the genetic information from the parent chromosomes after performing a crossover operation. The objective of the formulated mathematical model is to minimize the total truck service cost. The conducted numerical experiments demonstrate that the optimality gap of the developed algorithm does not exceed 0.18% over the considered small size problem instances. The analysis of the realistic size problem instances indicates that deployment of the developed solution algorithm reduces the total truck handling time, the total truck waiting time, and the total truck delayed departure time on average by 6.14%, 32.61%, and 34.01%, respectively, as compared to a typical Evolutionary Algorithm. Furthermore, application of the diploidy concept decreases the total truck service cost by 18.17%
PROBLEM OF A RATIO OF THE POINTS OF VIEW IN THE NOVEL “FOMA GORDEYEV” BY MAXIM GORKY
No full textVarious points of view of the characters of the novel “Foma Gordeyev” by Maxim Gorky come
to light and are analysed in the article, their complicated ratio supported by certain motives – work or business, dissociation, loneliness, enrichment and search of the place in life – is considered. It is proved that the
ratio of the characters’ points of view understood by the author as positions, from which events are considered, is among the bright artistic touches of early works of Maxim Gorky. This inclusion in the Fin de siècle
era, time of the overall overturn and of the new judgement of many concepts could be used in connection
with unwillingness of Maxim Gorky’s open expression of his author’s opinion. Composing a fancy plot, bringing heroes together, the
writer offers the sooth at the reader’s discretion rather than making emphases. The narrator’s voice is dominating, beginning and finishing the epic narration, at the same time only framing various points of view of the characters. The polyphony of the novel and the
thought-over ratio between the author, the storyteller and the heroes allowed Maxim Gorky creating gallery of living, spatial characters,
emphasising dramatic bases of the Russian life of the represented period and reducing all voices to a uniform denominator. The ratio
of the heroes’ points of view becomes one of the bases of the work’s composition and leads to understanding of the reasons of failures
of many characters. The author of the article analyses ways of introducing the speaking people’s images to the artistic text, emphasises
existence of the special sayings for all occasions in the text designed to influence the recipient by the offer of “wisdom formulas” to it,
only to be taken stock of by the reader. Most likely, the ratio of the points of view in the novel as a special device had, on the one hand,
already been preconditioned, and, on the other hand, could affect a peculiar mosaicity of the upcoming Maxim Gorky’s personal artistic
method. Moreover, features of the narration and substantial aspects of composition allow us saying that in the novel “Foma Gordeyev”,
Maxim Gorky creatively masters and actively uses findings of the Russian classics of the second half of the 19th century
170226 ELDER CARE EVENT BEARD 007
No full textProfessor Laura Olson, a member of the Political Science department at Lehigh, listens to her audience on Wednesday, Feb. 22, 2017 in Williams Hall. Olson is the author of "Elder Care Journey: A View from the Front Lines" (Maxim Beard/B&W Staff
170226 ELDER CARE EVENT BEARD 003
No full textProfessor Laura Olson, author of "Elder Care Journey: A View from the Front Lines", talks during a Brown Bag Series on Wednesday, Feb. 22, 2017 in Williams Hall. Olson is a professor of Political Science at Lehigh. (Maxim Beard/B&W Staff
170226 ELDER CARE EVENT BEARD 005
No full textProfessor Laura Olson, author of "Elder Care Journey: A View from the Front Lines", speaks during a Brown Bag Series on Wednesday, Feb. 22, 2017 in Williams Hall. Olson passionately discussed her personal experience with the long-term care system in the U.S. (Maxim Beard/B&W Staff
A New Simulation Model for a Comprehensive Evaluation of Yard Truck Deployment Strategies at Marine Container Terminals
No full textTaking into account increasing volumes of the international seaborne trade and increasing port congestion, marine container terminal operators have to improve efficiency of their operations in order to provide timely service of vessels and avoid product delivery delays to customers. This paper focuses on improvement of container transfer operations between the seaside and the marshaling yard and proposes five yard truck deployment strategies. Performance of the considered marine container terminal is evaluated under each one of the yard truck deployment strategies via simulation. Different performance indicators are estimated to determine how the suggested yard truck deployment strategies will affect all equipment types, involved in container handling and transfer. Results from the extensive simulation experiments showcase that all five yard truck deployment strategies provide similar values of vessel service and quay crane performance indicators, while the shortest distance based yard truck deployment strategy yields superior gantry crane and yard truck performance indicators. The worst values of performance indicators are recorded for the random yard truck deployment strategy. Furthermore, the developed simulation model can serve as an efficient planning tool for marine container terminal operators and enhance productivity of the available equipment
An RNA interference knock-down of nitrate reductase enhances lipid biosynthesis in the diatom Phaeodactylum tricornutum
No full textWhen diatoms are stressed for inorganic nitrogen they remodel their intermediate metabolism and redirect carbon towards lipid biosynthesis. However, this response comes at a significant cost reflected in decreased photosynthetic energy conversion efficiency and growth. Here we explore a molecular genetics approach to restrict the assimilation of inorganic nitrogen by knocking down nitrate reductase (NR). The transformant strain, NR21, exhibited about 50% lower expression and activity of the enzyme but simultaneously accumulated over 40% more fatty acids. However, in contrast to nitrogen-stressed wild-type (WT) cells, which grow at about 20% of the rate of nitrogen-replete cells, growth of NR21 was only reduced by about 30%. Biophysical analyses revealed that the photosynthetic energy conversion efficiency of photosystem II was unaffected in NR21; nevertheless, the plastoquinone pool was reduced by 50% at the optimal growth irradiance while in the WT it was over 90% oxidized. Further analyses reveal a 12-fold increase in the glutamate/glutamine ratio and an increase NADPH and malonyl-CoA pool size. Transcriptomic analyses indicate that the knock down resulted in changes in the expression of genes for lipid biosynthesis, as well as the expression of specific transcription factors. Based on these observations, we hypothesize that the allocation of carbon and reductants in diatoms is controlled by a feedback mechanism between intermediate metabolites, the redox state of the plastid and the expression and binding of transcription factors related to stress responses.Peer reviewe
Contribution of Citizen Science to Biodiversity Data Mobilization in Russia
No full textPresentation for TDWG 2020 - A Virtual Conference
Session: CO03, 22 October 2020
Conference Abstract: https://doi.org/10.3897/biss.4.59197
video: https://youtu.be/dOp6j69qxT4Presenting author: Maxim Shashko
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