253 research outputs found
Lymphocytic esophagitis: an update on histologic diagnosis, endoscopic findings, and natural history
No full text
An Update on the Role of Immunohistochemistry in the Evaluation of Gastrointestinal Tract Disorders
No full textUtility of Human Papillomavirus Capsid Protein L1 and p16 in the Assessment and Accurate Classification of Anal Squamous Intraepithelial Lesions
No full textAlphabetical ordering of author surnames in academic publishing: A detriment to teamwork.
No full textIntroductionIn academia, many institutions use journal article publication productivity for making decisions on tenure and promotion, funding grants, and rewarding stellar scholars. Although non-alphabetical sequencing of article coauthoring by the spelling of surnames signals the extent to which a scholar has contributed to a project, many disciplines in academia follow the norm of alphabetical ordering of coauthors in journal publications. By assessing business academic publications, this study investigates the hypothesis that author alphabetical ordering disincentivizes teamwork and reduces the overall quality of scholarship.MethodsTo address our objectives, we accessed data from 21,353 articles published over a 20-year period across the four main business subdisciplines. The articles selected are all those published by the four highest-ranked journals (in each year) and four lower-ranked journals (in each year) for accounting, business technology, marketing, and organizational behavior. Poisson regression and binary logistic regression were utilized for hypothesis testing.ResultsThis study finds that, although team size among business scholars is increasing over time, alphabetical ordering as a convention in journal article publishing disincentivizes author teamwork. This disincentive results in fewer authors per publication than for publications using contribution-based ordering of authors. Importantly, article authoring teamwork is related to article quality. Specifically, articles written by a single author typically are of lesser quality than articles published by coauthors, but the number of coauthors exhibits decreasing returns to scale-coauthoring teams of one to three are positively related to high-quality articles, but larger teams are not. Alphabetical ordering itself, however, is positively associated with quality even though it inhibits teamwork, but journal article coauthoring has a greater impact on article quality than does alphabetical ordering.ConclusionsThese findings have important implications for academia. Scholars respond to incentives, yet alphabetical ordering of journal article authors conflicts with what is beneficial for the progress of academic disciplines. Based on these findings, we recommend that, to drive the highest-quality research, teamwork should be incentivized-all fields should adopt a contribution-based journal article author-ordering convention and avoid author ordering based upon the spelling of surnames. Although this study was undertaken using articles from business journals, its findings should generalize across all academia
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
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
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