1,653 research outputs found
Interview with K.A. Hays
No full textK.A. Hays’ most recent book is Anthropocene Lullaby (February 2022, Carnegie Mellon). She is the author of three prior books of poetry: Windthrow (2017), Early Creatures, Native Gods (2012) and Dear Apocalypse (2009). Her poems appear widely in journals and have been selected for two editions of Best American Poetry. Born in Phoenixville, Pennsylvania, she earned an MFA from Brown University. She teaches Creative Writing at Bucknell University in Lewisburg, PA, and directs the Bucknell Seminar for Undergraduate Poets, a 3-week all-expenses paid summer writing retreat and conference for undergraduate poets from any university or college in the United States
Skin-Friction Measurements on Mathematically Generated Roughness in a Turbulent Channel Flow
No full textEngineering systems are affected by surface roughness, however, predicting frictional drag has proven to be challenging. The present work takes a systematic approach by generating and manufacturing surfaces roughness where surface statistics, such as rms, skewness and power-spectral density can be controlled. The frictional drag on these surfaces is measured in a turbulent channel flow facility
International Research Roundtable “History of the Kazakh Statehood. On the 80th Anniversary of the Famous Researcher K.A. Pischulina” (December 24, 2014) »
No full textThis article contains a brief description of the International research conference. The author gives a brief description of the papers presented at the conference. The following reports were presented at the conference: K.Z. Uskenbay. “The Kazakh Statehood during the Late Middle Ages in the Scientific Biography of K.A. Pishchulina”; A. Daulethan. “Formation of Kazakh Culture in the Era of the Mongol Uluses (13th–16th centuries)”; N. Kenzheahmet. “The Kazakh Khanate in the Chinese Sources (15th–16th centuries)”; I.M. Mirgaleev. “Activities of the Centre for Research on the Golden Horde History (Sh.Marjani Institute of History, Academy of Sciences of the Republic of Tatarstan) Aimed at Studying New Sources”; K.U. Torlanbaeva. “Ancient and Medieval Kazakhstan in Migration Processes”; Zh.Zh. Zhenis. “Continuity of Statehood and Traditional Worldview in the Empire of Genghis Khan”; A.P. Ermuhamedova. “The Oghuz Role in World History”; N.A. Atygaev. “Early Stage in the History of Kazakh Khanate in the Works of K.A. Pischulina”
Empirical Research and Modeling of Longitudinal Driving Behavior Under Adverse Conditions
No full textAdverse conditions (emergency situations, adverse weather conditions, freeway incidents) have been shown to have a substantial impact on traffic flow operations. It is however unclear to what extent the conditions impact longitudinal driving behavior and what the determinants of these changes in driving behavior are. Furthermore, it is not yet clear how these changes in driving behavior can best be modeled. To this end we performed three extensive driving simulator experiments intended to investigate the influence of emergency situations, adverse weather conditions and freeway incidents on empirical longitudinal driving behavior as well as driver workload. Furthermore we determined the influence of these conditions on parameter values and model performance of an often used car-following model, i.e., the Intelligent Driver Model (Treiber et al., 2000). We also determined changes in the position of so-called action points in a psycho-spacing model and took some first steps towards the development of a new stochastic car following model based on a Bayesian network modeling approach.Transport & PlanningCivil Engineering and Geoscience
EFFECT OF FLY ASH AND RBI GRADE 81 ON SWELLING CHARACTERISTICS OF CLAYEY SOIL
No full textThe thickness of road depends on geotechnical properties of subgrade soil and traffic intensity. The clayey soil is not suitable for subgrade due to its swelling characteristics. The soil having more liquid limit (LL), lower Maximum dry density (MDD) and higher Optimum moisture content (OMC) is suitable for subgrade of road. The clayey soil having more LL, lower MDD and higher OMC. Therefore clayey soil is not suitable as subgrade soil of roads. This paper deals with stabilization of clayey soil by using fly ash and RBI Grade 81 to improve the geotechnical properties of soil. The fly ash is a thermal waste and RBI Grade 81 is a chemical soil stabilizer. In the laboratory standard Proctor test (SPT), Atterbergs limits and differential free swelling index (DFS) test for different proportions of soil, fly ash and RBI Grade 81conducted. The results show that, the LL, MDD, OMC and DFS index of clayey soil improved considerably. The LL of untreated soil is 67% and it reduces to 46% for mix of soil: fly ash: RBI Grade 81 for 76:20:04 proportion. The DFS of untreated soil is 65% and it reduces to 40% for addition of fly ash and RBI Grade 81
Effect of industrial waste and RBI Grade 81 on swelling characteristics of clayey soil
No full textThis paper deals with improvement of swelling characteristics of clayey soil
by adding industrial waste and RBI Grade 81. The construction of road in
clayey soil is challenging due to its more swelling and more shrinkage
characteristics. To overcome this problem there are two solutions one is
replace the clayey soil by good quality granular material. The second is
stabilizing the subgrade clayey soil by using various industrial wastes.
Generally pond ash, fly ash and stone dust are use for soil stabilization.
The swelling and shrinkage characteristics of clayey soil are considerably
improved if it treated with industrial wastes and RBI Grade 81. The RBI Grade
81 is chemical soil stabilizer. The differential free swell index (DFS) test
was carried out on different mix of soil, industrial waste and RBI Grade 81.
The result shows that the DFS index of untreated soil obtained is 65% reduces
to 35% by addition of 20% fly ash and 4% RBI Grade 81. This reduction in DFS
index helps to reduce the effect of moisture variation in clayey soil
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Structural organization of a major neuronal g protein regulator, the RGS7-Gβ5-R7BP complex
No full textSignaling by the G-protein-coupled receptors (GPCRs) plays fundamental role in a vast number of essential physiological functions. Precise control of GPCR signaling requires action of regulators of G protein signaling (RGS) proteins that deactivate heterotrimeric G proteins. RGS proteins are elaborately regulated and comprise multiple domains and subunits, yet structural organization of these assemblies is poorly understood. Here, we report a crystal structure and dynamics analyses of the multisubunit complex of RGS7, a major regulator of neuronal signaling with key roles in controlling a number of drug target GPCRs and links to neuropsychiatric disease, metabolism, and cancer. The crystal structure in combination with molecular dynamics and mass spectrometry analyses reveals unique organizational features of the complex and long-range conformational changes imposed by its constituent subunits during allosteric modulation. Notably, several intermolecular interfaces in the complex work in synergy to provide coordinated modulation of this key GPCR regulator. © Patil et al
Self-organizing avulsions in an endorheic dryland river system
No full textAccepted author manuscriptApplied Geolog
Actual Problems of Kazakh History. Review of the Book by K.A. Pishchulina “Essays on the History of the Kazakh Khanate”
No full textA collection of articles written by a well-known orientalist-historian K.A. Pishchulina and published in 2016 includes papers of different years, written on the basis of Persian and Turkic sources reflecting the most pressing issues related to Kazakh khanate. The publishing of this work immediately became a major event in historical scholarship of Kazakhstan.
During the Soviet period, the history of this state, as well as of other states created by nomadic peoples, remained poorly understood. Many questions were debatable, since Marxism-Leninism, which was in forefront of science, could not adapt the formational class theory for a nomadic society and nomadic mode of production etc.
However, some researchers, including K.A. Pishchulina, were already thinking about these issues. Particularly she studied the role of Turkestan cities as part of Kazakh khanate. According to her main findings, these cities performed a variety of functions being centers of handicraft production, agriculture and trade. As for Turkestan city itself, it was capital and spiritual center of the state, and the management of settled-agricultural population was carried out by various officials. Furthermore, the collection of Pishchulina’s papers discusses management system of nomadic population, tax system of the Khanate. The author comes to a justified conclusion that monetary system needs to be studied further.
Next major issue relates to mythologization of Turkic peoples’ history. The books written by amateurs assert that the Golden Horde was a part of Khanate, and Chinggis Khan was a Kazakh. Therefore, several Pishchulina’s articles were published in order to expose these myths. Thus, in this collection the reader would find answers to a variety of questions related to the history of Kazakhstan and adjacent territories and its impact in modern times
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