2,195 research outputs found
Optimal Operation of a Network of Multi-purpose Reservoir: A Review
No full textAbstractDue to the effects of climate change and population growth, reservoirs play a more and more important role in water resources management. The management of a multi-reservoir system is complex due to the curse of dimensionalities, nonlinearities and conflicts between different objectives. The optimal operation of a multi-reservoir system operation typically involves optimization and simulation models, which can provide the quantitative information to improve operational water management. The objectives of this paper are to extend previous state-of-the-art reviews in the operational management of a network of multi-purpose reservoirs with recent developments and to focus on the application of Model Predictive Control for real time control of a reservoir system
Performance of a micro-engineered ultrasonic particle manipulator
No full textAn ultrasonic microfluidic particle manipulator has been modeled and its experimentally measured separation performance has been compared with the modeled results for 1 µm latex particles, and yeast particles in water
Real-time operation of a multi-reservoir system
No full textReservoirs have a significant role to manage fresh water resources for irrigation, hydropower generation, domestic and industrial use, flood and drought control and navigation. To date, more than 50,000 large dams have been constructed in the world for providing water-related services to our society that support socioeconomic development of many regions. An efficient reservoir operation helps us to maximize benefits and to minimize the negative impacts of existing reservoirs. In practice, reservoir operation is a complex decision-making process involving multi-variables, multiple objectives and constraints, nonlinearity, and uncertainty. A framework of reservoir operation typically involves optimization and simulation procedures in which releases of reservoirs are determined by optimizing the objective functions and the system performance is evaluated using a simulation model. Despite significant developments in reservoir operation have been made in the last 50 years, there is a little progress for operation of a multi-reservoir system concerning real-time control, multi-objective optimization and a basin-wide approach. Therefore, Chapter 2 presents optimization and simulation methods developed in the recent literature and the potential of model predictive control (MPC) for real-time reservoir operation.Water Resource
Dorsoventral patterning of the C. elegans postembryonic mesoderm requires both LIN-12/Notch and TGFβ signaling
No full textAbstractThe C. elegans postembryonic mesodermal lineage arises from a single cell M, which generates distinct dorsal and ventral cell types. We have previously shown that mutations in the Schnurri homolog sma-9 cause ventralization of the M lineage and that wild-type SMA-9 antagonizes the Sma/Mab TGFβ pathway to promote dorsal M lineage fates [Foehr, M.L., Lindy, A.S., Fairbank, R.C., Amin, N.M., Xu, M., Yanowitz, J., Fire, A.Z., Liu, J., 2006. An antagonistic role for the C. elegans Schnurri homolog SMA-9 in modulating TGFbeta signaling during mesodermal patterning. Development 133, 2887–2896]. Interestingly, loss-of-function mutations in the Notch receptor lin-12 cause dorsalization of the M lineage [Greenwald, I.S., Sternberg, P.W., Horvitz, H.R., 1983. The lin-12 locus specifies cell fates in Caenorhabditis elegans. Cell 34, 435–444]. We have found that although LIN-12 protein is present in both the dorsal and ventral M lineage cells, its ligands LAG-2 and APX-1 are asymmetrically localized in cells adjacent to ventral M-derived cells, and may function redundantly in promoting ventral M lineage fates. To investigate how LIN-12/Notch signaling interacts with SMA-9 and Sma/Mab TGFβ signaling in regulating M lineage patterning, we generated double and triple mutant combinations among lin-12, sma-9 and dbl-1 (the ligand for the Sma/Mab TGFβ pathway) and examined their M lineage phenotypes. Our results suggest that the LIN-12/Notch pathway and the Sma/Mab TGFβ pathway function independently in regulating dorsoventral patterning of the M lineage, with LIN-12/Notch required for ventral M lineage fates, and SMA-9 antagonism of TGFβ signaling required for dorsal M lineage fates. Our work provides a model for how combined Notch and TGFβ signaling regulates the developmental potential of two equipotent cells along the dorsoventral axis
Religious and philosophical psychology in the works of N.M. Bogolyubov
No full textWe present the results of historical and psychological research filling the gaps of contemporary knowledge about personalities of religious and philosophical direction of Russian psychology in late XIX – early XX centuries. The author introduces the biography of events and the views of Russian psychologist N.M. Bogolyubov – a man of uneasy fate, embodied in his work the idea of spiritual practice in the analysis and description of a person's inner world. Psychological works of N.M. Bogolyubov reflect the views common for Russian spiritual direction in psychology: consideration of man's inner world by revealing how mental experience is given to the person, his self, recognition of the soul as a sphere of inner reality, recognition of the mental world of a person as an independent entity, living by its own laws, which do not depend on the laws of the material world, asserting that faith can be a valid knowledge. In the arsenal of creative achievements of N.M. Bogolyubov are determination of the value of psychology in studying the problem of religious consciousness and professionalism as a necessary quality of a researcher psychologist in the field
An improved thick-film piezoelectric material by powder blending and enhanced processing parameters
No full textThis paper details improvements of the d33 coefficient for thick-film lead zirconate titanate (PZT) layers. In particular, the effect of blending ball and attritor milled powders has been investigated. Mathematical modeling of the film structure has produced initial experimental values for powder combination percentages. A range of paste formulations between 8:1 and 2:1 ball to attritor milled PZT powders by weight have been mixed into a screen-printable paste. Each paste contains 10% by weight of lead borosilicate glass and an appropriate quantity of solvent to formulate a screen printable thixotropic paste. A d33 of 63.5 pC/N was obtained with a combination of 4:1 ball milled to attritor milled powder by weight. The improved paste combines the high d33 values of ball and the consistency of attritor milled powder. The measured d33 coefficient was further improved to 131 pC/N by increasing the furnace firing pro-file to 100
Spectral characterisation of shortened pulse position modulation format
No full textShortened pulse position modulation (SPPM) is a new modulation format that has recently been proposed for underwater wireless optical communications. A full spectral characterisation of SPPM is considered and original expressions are presented, which are validated numerically for predicting both the continuous and discrete spectrum
N.M. JADRINTSEV AND ALTAY: RESEARCH ACTIVITIES OF THE PUBLICIST AND HIS ROLE IN THE DEVELOPMENT OF ALTAI PERIODICALS
No full textPurpose. The purpose of this article is to study the role of Nikolai Mikhailovich Yadrintseva in the course of development of the Altai periodicals and its research and statistical activities in the Altai.
Methodology. When writing the article were used General scientific methods like analysis, comparison, generalization.
Results. As a result, the author analyzed the research, ethnographic and statistical activities of Nikolai Mikhailovich Yadrintsev in the Altai. Visiting with the research mission Altai, N.M. Yadrintsev published grandiose essays and articles not only about the ethnographic side of the Altaian “aliens”, but also was able to give his inhabitants a map of the locality and a detailed description of meteorological observations. The role of N.M. Yadrintsev in the development of the Altai periodicals and gives a general description of the newspaper “Eastern Review” under his leadership. Despite the fact that publications on behalf of N.M. Yadrintsev in the Altai were not preserved, with the exception of a small quatrain, he managed to raise the provincial periodicals to a completely new level. Together with Siberian correspondents, he was able to inspire a whole generation, as a result of which universities, museums and numerous Siberian publishing houses began to develop in the cities of Siberia. With the arrival of Nikolai Mikhailovich in the Altai, the periodical press noticeably developed and strengthened.
Practical implications. The article can be used in the teaching of local history, the history of Russia and Russian journalism
Spectral characterisation of nk pulse position modulation format
No full textnk pulse position modulation (PPM) is a new modulation format that has recently been proposed for the optical wireless channel. This Letter considers, for the first time, a full spectral characterisation of -PPM and presents original expressions, which are validated numerically, for predicting both the continuous and discrete spectrum
Soil Chemistry
No full textMichael McLaughlin, Rebecca E. Hamon, David R. Parker, Gary M. Pierzynski, Erik Smolders, Iain Thronton and Gerd Werphttp://www.amazon.com/gp/reader/1880611422/ref=sib_dp_pop_toc?ie=UTF8&p=S008#reader-lin
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