157 research outputs found
Author Order and Research Quality
No full textSouthern Economic Journal © 2005 Southern Economic AssociationWe observe a great deal of heterogeneity in the manner in which author orderings are assigned both across and within academic markets. To better understand this phenomenon, we develop and analyze a stochastic model of author orderings. In our model, authors work equally hard to obtain priority in listings but final contributions are stochastic. Further, research outlets differ in their quality hurdles. In this setting, our simulation results are consistent with two empirical regularities. First, we find that the rate of alphabetization increases with the stringency with which papers are accepted for publication. Second, conditional on clearing the publication hurdle, quality increases with alphabetization. These findings arise because increases in the publication hurdle make it more likely that authors will exceed this threshold only when both contribute a high amount. This, in turn, leads to roughly equal contributions (alphabetization) and also generates a positive correlation between alphabetization and quality
New synthesis of 2,2 '-heteroarylpyrroles from heteroarylchlorocarbenes
No full text2,2'-Pyridyl- and 2,2'-thienylpyrroles containing substituents at the 1- and 3-positions of the pyrrole ring have been prepared from the reaction of heteroarylchlorocarbenes with 1-azabuta-1,3-dienes. Laser flash photolysis of heteroarylchlorocarbene in isooctane in the presence of 1-azabuta-1,3-diene yields an azomethine ylide (lambda=550 nm) as an intermediate. The kinetic parameters for the ylide formation and further 1,5-intramolecular cyclization to the pyrrole ring have been determined. (C) 1999 Elsevier Science Ltd. All rights reserved.PT: J; CR: BAIRD MS, 1990, J CHEM RES M, P946 ENGEL N, 1978, ANGEW CHEM INT EDIT, V17, P676 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 KATRITZKY AR, 1994, SYNTHESIS-STUTTGART, P93 KOROSTOVA SE, 1989, KHIM GETEROTSIKL+, P901 KOTKAR D, 1988, J CHEM SOC CHEM COMM, P917 KOZAKI M, 1996, J ORG CHEM, V61, P3657 LIU MTH, 1994, INT J CHEM KINET, V26, P1179 LUCCHESINI F, 1992, TETRAHEDRON, V48, P9951 MOSS RA, 1987, J AM CHEM SOC, V109, P4341 MOSS RA, 1992, TETRAHEDRON LETT, V33, P1427 NAITOH S, 1986, J CHEM SOC CHEM COMM, P1348 PATIL AO, 1988, CHEM REV, V88, P183 ROMASHIN YN, 1999, CHEM COMMUN 0307, P447 RONCALI J, 1992, CHEM REV, V92, P711 WALTMAN RJ, 1986, CAN J CHEM, V64, P76 ZELIKIN A, 1999, J ORG CHEM, V64, P3379; NR: 17; TC: 11; J9: TETRAHEDRON LETT; PG: 3; GA: 236PXSource type: Electronic(1
Forward osmosis for Desalination.
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Misusing mobile phones to break the ice: The tabletop game Maze Maestro
No full textPerformance of newly-formed project teams is often limited, or at least delayed, when team members refrain from sharing their ideas due to unfamiliarity with their peers. A variety of ice-breaking methods can help overcome this cold start, but mostly they need to be deployed and moderated by experienced facilitators. This setup is rarely an option for most undergrad project courses at university level, typically carried out in small teams. In order to help breaking the ice in this context, we developed Maze Maestro, a collaborative tabletop game in which the board is made up by attaching the displays of the team members' mobile phones to form a large maze. Each member controls a character in the maze, and the whole team has the common goal of leaving the maze together; however, this is only possible with timely communication and much cooperation. While playing, team members are encouraged to confer possible plans and share their ideas, which is the fertile ground for breaking the ice. Play testing has shown that Maze Maestro was perceived as a fun and original collaborative game. So far, results of a preliminary user study are optimistic about the ability of Maze Maestro to break the ice within newly-formed teams, without requiring any facilitator.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Computer Graphics and Visualisatio
Problem Sets for Aerospace Structures
No full textThis collection of interactive problems and solutions includes over twenty-five collections of 3-5 problems each on topics relevant to undergraduate-level aerospace structures such as: load factors, strain, stress, stress transformation and principal stresses, material properties, composites, equations of equilibrium, Airy stress function, thermoelasticity, failure theories, elastic-plastic analysis, fracture, beam bending, principal of minimum total potential energy, finite element method for beams, plate bending, buckling, structural dynamics, and aeroelasticity.
Purpose
The problem sets were developed to help faculty provide regular formative assessments to the students without any corresponding grading burden (for the faculty or TA). The assessments can be given twice a week in a typical class and can help the students get feedback on a regular basis. Problem sets supplement the open textbook, Aerospace Structures by Eric Raymond Johnson (2022) https://doi.org/10.21061/AerospaceStructures.
Author and license information
The problem sets were developed by Mayuresh Patil, former Associate Department Chair, Kevin T. Crofton Department of Aerospace and Oceanic Engineering at Virginia Tech, and currently Professor of Practice at Daniel Guggenheim School of Aerospace Engineering at Georgia Tech.
Problem sets are ©2021 Mayuresh Patil and released under a Creative Commons NonCommercial ShareAlike 4.0 (CC BY NC-SA) license. License terms are available at https://creativecommons.org/licenses/by-nc-sa/4.0.
Suggested citation
Patil, Mayuresh. (2021) Problem Sets for Aerospace Structures. CC BY-NC-SA. Retrieved from http://hdl.handle.net/10919/104169.
Technical notes regarding use of the problem sets
Each of the 25+ problem sets were built in Canvas “legacy quizzes” and exported into the IMS QTI 1.2 format.
Open access to the problem sets
- Problem sets are available for free public view in Canvas Commons. View the list of direct links provided below, download the file titled "Problem_set_URLs_for_Canvas_Commons.txt (2.863Kb)" from this page, or search for “Aerospace Structures” at https://lor.instructure.com. A Canvas account is not required to view items designated as “public” in Canvas Commons.
- Users logged into a Canvas account may import these directly to an existing course or download them in IMS QTI 1.2 format for use in a different IMS QTI compatible system such as Blackboard, D2L, or other IMS QTI-compliant systems.
- Users without a Canvas account have the option to create a free canvas account at: https://canvas.instructure.com/register_from_website, which will allow them to export / download them.
- IMS QTI 1.2 formatted downloads of problem sets are also available as Zip files without a login on the left side of this page. They were exported using open source 7zip software.
Please note that we are unable to provide additional file types, support for uploading, or assistance with reformatting files. Please contact your local learning management system (LMS) manager for additional support.
Help us!
If you are an instructor using, reviewing, adopting, or adapting questions from the problem set we would love to know! Please help us understand your use by filling out this form.
Acknowledgments
This project was made possible in part by funding of the Virtual Library of Virginia and assistance from the Open Education Initiative of the University Libraries at Virginia Tech.
Author: Mayuresh Patil
Project Manager: Anita Walz
Direct links to problem sets in the Canvas Commons system
- Airy Stress Function (Part I)
https://lor.instructure.com/resources/bc7f1eac158e4ec69d8542348492cbe7?shared
- Airy Stress Function (Part II):
https://lor.instructure.com/resources/cadcd3b91117444a8539e6068fae4860?shared
- Beam Buckling:
https://lor.instructure.com/resources/dbd9e74cbe4c474483aed9ba3d46cebd?shared
- Beam Buckling using PMTPE:
https://lor.instructure.com/resources/09051d82e6f145d292d43f2192a08dce?shared
- Buckling (Discrete Systems):
https://lor.instructure.com/resources/1f444c42b32c40899ebbf183cc43ad80?shared
- Beam Analysis using PMTPE:
https://lor.instructure.com/resources/d1cc9160c39b48f493a59c6104d5d33a?shared
- Composites:
https://lor.instructure.com/resources/4b776606c2e9494f8464b775815878c3?shared
- Constitutive Law:
https://lor.instructure.com/resources/e55059203a5d45f29a9f1468f1a48b9d?shared
- Elastic-Plastic Analysis:
https://lor.instructure.com/resources/7b7f2fcf64bd44d880695ee33bda08fd?shared
- Equilibrium:
https://lor.instructure.com/resources/52995ce999ad4894b8e2b312bba7bfc6?shared
- Failure Theories:
https://lor.instructure.com/resources/007a7ae0772644e387f2473ba5a1ed46?shared
- Fracture:
https://lor.instructure.com/resources/f7c46457a70e4a21a2b5b3bf819fc804?shared
- Load Factors:
https://lor.instructure.com/resources/b1d1974fe78c46ba8f4c5c6c733a1737?shared
- Material Properties:
https://lor.instructure.com/resources/75def72391b945c3bce8c73a5eb6c052?shared
- Plate Bending:
https://lor.instructure.com/resources/285f2faccc8a4ce5a45d2256e8106066?shared
- Plate Buckling using PMTPE:
https://lor.instructure.com/resources/49937783dff542e1b4dc80fa979a4d87?shared
- PMTPE (Discrete Systems):
https://lor.instructure.com/resources/3b9e350fa6004c18aa2568b16caddfc8?shared
- Strain:
https://lor.instructure.com/resources/934505d71f124d249067be1f5b7eb753?shared
- Stress:
https://lor.instructure.com/resources/90190ea55ae641459661c1f199549948?shared
- Thermoelasticity:
https://lor.instructure.com/resources/d0a90b895c2545768b3df07c0210ffea?shared
- V-n diagram:
https://lor.instructure.com/resources/32617ae1ff3344258354b4385693f4aa?shared
- Plate Buckling:
https://lor.instructure.com/resources/1264f807f84f44808e03e00be51e5c49?shared
- Plate with a Hole:
https://lor.instructure.com/resources/672eca566a814e16b052757004f68963?shared
- Polar Coordinates:
https://lor.instructure.com/resources/2b20db974faa44309430866eae247a9e?shared
- Principle/Maximum Stresses:
https://lor.instructure.com/resources/df7c8e088ccb4a9991753f87b15c99ff?shared
- Stress/Strain Transformation:
https://lor.instructure.com/resources/4a11d3349e8e4443b607915656279cd3?sharedVIVA (Virtual Library of Virginia
Preparation of ZnS/ZnO core - Shell nanocomposite and its photocatalytic behaviour for dye degradation
No full textBinding sensorgram for tannic acid interaction with immobilized AChE.
No full textIncreasing concentrations of tannic acid from 0.78 μM-12.5 μM were injected over the enzyme surface at 25°C. The flow rate is maintained at 45 μl min-1. Contact time and dissociation time was kept at 120 s and 200 s. Regeneration was carried out using 10 mM glycine HCl with pH 3 for 30 s and at 30 μl min-1. The data analysis was done using Biacore X100 evaluation software ver 2.0.2 and data was fit to two state. The resulting equilibrium dissociation constants KD, kinetic association kon and dissociation koff rates are given in Table 2.</p
Binding sensorgram for quercetin interaction with immobilized AChE.
No full textIncreasing concentrations of quercetin from 50 μM-800 μM were injected over the enzyme surface at 25°C. The flow rate is maintained at 45 μl min-1. Contact time and dissociation time was kept at 120 s and 200 s. Regeneration was carried out using 10 mM glycine HCl with pH 3 for 30 s and at 30 μl min-1. The data analysis was done using Biacore X100 evaluation software ver 2.0.2 and data was fit to two state. The resulting equilibrium dissociation constants KD, kinetic association kon and dissociation koff rates are given in Table 2.</p
Binding sensorgram for galamer4 interaction with immobilized AChE.
No full textIncreasing concentrations of galanthamine tablet from 50 μM-800 μM were injected over the enzyme surface at 25°C. Flow rate is maintained at 45 μl min-1. Contact time and dissociation time was kept at 120 s and 200 s. Regeneration was carried out using 10 mM glycine HCl with pH 3 for 30 s and at 30 μl min-1. The data analysis was done using Biacore X100 evaluation software ver 2.0.2 and data was fit to two state. The resulting equilibrium dissociation constants KD, kinetic association kon and dissociation koff rates are given in Table 2.</p
Binding sensorgram for tannic acid and galanthamine hydrobromide interaction with immobilized AChE.
No full textIncreasing concentrations of tannic acid from 3.12 μM-50 μM and galanthamine hydrobromide from 50 μM-800 μM were injected over the enzyme surface at 25°C. The flow rate is maintained at 45 μl min-1. Contact time and dissociation time was kept at 120 s and 200 s. Regeneration was carried out using 10 mM glycine HCl with pH 3 for 30 s and at 30 μl min-1. The data analysis was done using Biacore X100 evaluation software ver 2.0.2 and data was fit to heterogeneous analyte fit. The resulting equilibrium dissociation constants are given in Table 3.</p
- …
