The Alternating Surface Segmented Lap Joint: a Design for Thin Highly Loaded Joints

The combination of thin airfoil sections and high aerodynamic loads on many wind tunnel models presents a major problem for attachment of flap elements. Conventional methods of attaching fixed control elements such as lap and tongue-in-groove joints are not rigid enough to provide surface continuity required in high Reynolds number research. For the extreme cases, the solution has been to fabricate separate wings for each flap setting with the flap element being and integral part of the wing. Here an attractive solution to this problem, the alternating surface segmented lap joint, is discussed. This joint provides increased rigidity and lower stress levels than conventional joints. Additionally, attachment fastener loading is low and the joint can be designed to accommodate high shear levels due to bending without the use of dowel pins

Investigation of Low-temperature Solders for Cryogenic Wind Tunnel Models

The advent of high Reynolds number cryogenic wind tunnels has forced alteration of manufacturing and assembly techniques and eliminated usage of many materials associated with conventional wind tunnel models. One of the techniques affected is soldering. Solder alloys commonly used for wind tunnel models are susceptible to low-temperature embrittlement and phase transformation. The low-temperature performance of several solder alloys is being examined during research and development activities being conducted in support of design and fabrication of cryogenic wind tunnel models. Among the properties examined during these tests are shear strength, surface quality, joint stability, and durability when subjected to dynamic loading. Results of these tests and experiences with recent models are summarized

Deep Ordinal Reinforcement Learning

Reinforcement learning usually makes use of numerical rewards, which have nice properties but also come with drawbacks and difficulties. Using rewards on an ordinal scale (ordinal rewards) is an alternative to numerical rewards that has received more attention in recent years. In this paper, a general approach to adapting reinforcement learning problems to the use of ordinal rewards is presented and motivated. We show how to convert common reinforcement learning algorithms to an ordinal variation by the example of Q-learning and introduce Ordinal Deep Q-Networks, which adapt deep reinforcement learning to ordinal rewards. Additionally, we run evaluations on problems provided by the OpenAI Gym framework, showing that our ordinal variants exhibit a performance that is comparable to the numerical variations for a number of problems. We also give first evidence that our ordinal variant is able to produce better results for problems with less engineered and simpler-to-design reward signals.Comment: replaced figures for better visibility, added github repository, more details about source of experimental results, updated target value calculation for standard and ordinal Deep Q-Networ

Using CliftonStrengthsTM for Professional Development: Recommendations for Practice

This article explores how a culture of strengths-based leadership can positively impact professional development for school site administrators. The strengths of school district administrators were measured through the administration of CliftonStrengths™ assessment. Themes that emerged were determined through the assessment and qualitative analysis of responses. A sample of convenience 50 principals and assistant principals from a public school district in Southern California participated in this research. The findings revealed that the common talent themes among school site administrators were relationship building, executing, influencer, and learner. This study supports future practices to enable human resources personnel to design targeted professional development for school site administrators. An analysis of a school administrator\u27s strengths and personality traits is unique to each school district. The results support human resource professionals\u27 efforts to determine personnel\u27s future needs, including hiring and developing school leaders

Pre- and post-processing for Cosmic/NASTRAN on personal computers and mainframes

An interface between Cosmic/NASTRAN and GIFTS has recently been released, combining the powerful pre- and post-processing capabilities of GIFTS with Cosmic/NASTRAN's analysis capabilities. The interface operates on a wide range of computers, even linking Cosmic/NASTRAN and GIFTS when the two are on different computers. GIFTS offers a wide range of elements for use in model construction, each translated by the interface into the nearest Cosmic/NASTRAN equivalent; and the options of automatic or interactive modelling and loading in GIFTS make pre-processing easy and effective. The interface itself includes the programs GFTCOS, which creates the Cosmic/NASTRAN input deck (and, if desired, control deck) from the GIFTS Unified Data Base, COSGFT, which translates the displacements from the Cosmic/NASTRAN analysis back into GIFTS; and HOSTR, which handles stress computations for a few higher-order elements available in the interface, but not supported by the GIFTS processor STRESS. Finally, the versatile display options in GIFTS post-processing allow the user to examine the analysis results through an especially wide range of capabilities, including such possibilities as creating composite loading cases, plotting in color and animating the analysis

US Political Leadership and Crisis Communication During COVID-19

The research explored the role of political leadership in response to the novel coronavirus (COVID-19). The researchers conducted a political discourse analysis on 239 transcripts from the press briefings of President Trump and seven U. S. governors to determine the extent to which the research subjects used effective crisis leadership and communication. These results suggest that President Trump and Governors DeSantis, DeWine, Ducey, and Ivey are particularly vulnerable to political fallout for their handling of COVID-19 because stakeholders might view them as inattentive to the crisis and ineffective in their policy responses. Governors Cuomo, Newsom, and Whitmer may be in a better position to avoid fallout due to their information-seeking, hands-on approaches, which some will deem as competent and appropriate to the threat (although others may see their efforts as overcontrolling). The research demonstrated how discourse analysis could predict political behaviors and blame assignment for crisis responses

Developing Critical Thinking Within A Master of Science in Leadership Program

Critical thinking involves an important set of competencies, skills, and behaviors that can be systematically developed and cultivated. Critical thinking is fostered within the Master of Science in Leadership Program to help students achieve higher levels of thinking through the program and also to help them improve their leadership acumen. The paper describes critical thinking, provides background on the Paulian view of critical thinking used within the program, and presents the approach used to infuse critical thinking into the curriculum. The Master of Science in Leadership Program introduces critical thinking in the first required course and weaves critical thinking concepts and exercises throughout the entire program. Program administrators and course developers incorporated desired learning points into the curriculum through conceptual frameworks, active learning activities, targeted instructional techniques, and intellectual moves. Each of those components is part of a schema that ensures students engage concepts at the highest analytical levels within their individual contexts as leaders

Using Art to Promote Student Learning and Build Community Partnerships

In his vision for the ”New Museum,” John Cotton Dana advocated placing art close to books and journals, offering arts related programs, and developing an art collection to enhance visual learning. Dana Library, located on the Newark Campus of Rutgers-The State University of New Jersey, has succeeded in implementing these principles through its multifaceted arts program. Rotating fine arts and pedagogical exhibits along with a permanent art collection overrides the language and cultural differences of a diverse student body and the surrounding community. Interactions with the art support learning and self-discovery. The exhibit spaces and accompanying programming draw in New Jersey artists and local cultural organizations, strengthening the library’s outreach and the campus’s influence

Commercial fishing vessel as research vessels in the Antarctic – requirements and solutions exemplified with a new vessel

The climate-induced changes presently seen in the ecosystems of the Antarctic region require a precautionary approach with respect to the human use of these ecosystems. In particular, resource harvesting requires enough basic knowledge, as well as adequate monitoring, to avoid unintended impacts on the harvested stocks and the associated ecosystem. Due to the vastness and remoteness of the Antarctic region, research vessel capacity is not readily available for conventional coverage of harvested stocks and their ecosystems. This paper describes the potential of using commercial fishing vessels to bridge the gap in research vessel capacity. The various tasks and required instrumentation are presented and discussed. To illustrate this concept a description of a Norwegian krill fishing vessel now under construction is presented. This type of combined fishing and research vessel could make a large amount of important data available for both management, through CCAMLR, and the broader scientific community and thus improve the basis for resource evaluation and management