Computer program for structural analysis of layered orthotropic ring-stiffened shells of revolution (SALORS): Linear stress analysis option

Program handles segmented, laminar, orthotropic shells with discrete rings. Meridional variations are handled in material properties, temperatures, and wall thickness. Allows for linear variations of temperature through each layer of shell wall

Poisson factorization for peer-based anomaly detection

Anomaly detection systems are a promising tool to identify compromised user credentials and malicious insiders in enterprise networks. Most existing approaches for modelling user behaviour rely on either independent observations for each user or on pre-defined user peer groups. A method is proposed based on recommender system algorithms to learn overlapping user peer groups and to use this learned structure to detect anomalous activity. Results analysing the authentication and process-running activities of thousands of users show that the proposed method can detect compromised user accounts during a red team exercise

Childhood Abuse, Invalidation, and Personality in a College Population

Studies show the detrimental effects of childhood maltreatment (i.e., childhood physical abuse, childhood sexual abuse, invalidation, and multiple forms of maltreatment; Afifi et al., 2016). Research demonstrates individuals with a history of childhood maltreatment have distinct patterns of personality characteristics (Allen & Lauterbach, 2007). Specifically, individuals with history of childhood maltreatment typically report high neuroticism, high openness, and low agreeableness compared to those with no history of maltreatment (Distel et al., 2009; Huang et al., 2012). Less is known about personality differences among individuals with different forms of childhood maltreatment (e.g., physical abuse vs. sexual abuse vs. invalidation vs. multiple forms of abuse). This study examined the relationships among childhood maltreatment and personality characteristics within a college population. Specifically, the aim was to replicate previous findings demonstrating personality differences between those with and without histories of childhood maltreatment and to extend the research by examining potential personality differences related to type of childhood maltreatment

Receipt from J. M. Heard to Ogden Goelet

https://digitalcommons.salve.edu/ochre-court/1215/thumbnail.jp

Invoice from J. M. Heard to Ogden Goelet

https://digitalcommons.salve.edu/goelet-personal-expenses/1025/thumbnail.jp

Vibration and Instability of Plate-Assemblies including Shear and Anisotropy (VIPASA) user's guide, addendum

Extensions developed at Langley Research Center to the VIPASA computer program are described including a procedure for simple thermal stress analysis and options for graphical display of output. Input requirements for operation of the modified program are given in detail

The effect of ring distortions on buckling of blunt conical shells

A rigorous analytical study of cones stiffened by many thin-gage, open-section rings is presented. The results are compared with data previously obtained from uniform pressure tests of the Viking mission flight aeroshell and of the Viking structural prototype aeroshells. A conventional analysis, in which the rings are modeled as discrete rigid cross sections, is shown to lead to large, unconservative strength predictions. A more sophisticated technique of modeling the rings as shell branches leads to much more realistic strength predictions and more accurately predicts the failure modes. It is also shown that if a small initial imperfection proportional to the shape of the buckling mode is assumed, the critical buckling modes from analysis and test are in agreement. However, the reduction in buckling strength from the perfect-shell predictions is small

Flutter design of stiffened-skin panels for hypersonic aircraft

Design factors for flutter control of stiffened exterior skin panels for hypersonic aircraf

A taxonomic guide to the mysids of the South Atlantic Bight.

Following the examination of extensive collections from the National Museum of Natural History (NMNH), the Southeastern Regional Taxonomic Center (SERTC), and other regional institutions, 18 species of the family Mysidae are recognized and described from the South Atlantic Bight (Cape Lookout, North Carolina to Cape Canaveral, Florida). This report includes synonymies of previous records, as well as new species distribution records. Previous regional accounts of Metamysidopsis munda and Metamysidopsis mexicana are attributed to Metamysidopsis swifti. New regional records are established for Amathimysis brattegardi, Heteromysis beetoni, and Siriella thompsonii. Two other species tentatively identified as Amathimysis sp. (nr. serrata) and Mysidopsis sp. (cf. mortenseni) may represent new taxa. Neobathymysis renoculata is included and discussed as a potential regional species. An illustrated key to the species currently known from the South Atlantic Bight is presented. Relevant taxonomic, distributional, and ecological information is also included for each species. (PDF file contains 45 pages.

Efficient concepts for large erectable space structures

The status of Langley Research Center development of the nestable column concept is reviewed including results of member and truss component tests, and planned assembly studies. In addition, more recent studies of alternative member concepts are presented. Preliminary results on relative efficiency of several types of truss-type columns are compared and future test plans discussed