Improving the fatigue resistance of adhesive joints in laminated wood structures

The premature fatigue failure of a laminated wood/epoxy test beam containing a cross section finger joint was the subject of a multi-disciplinary investigation. The primary objectives were to identify the failure mechanisms which occurred during the finger joint test and to provide avenues for general improvements in the design and fabrication of adhesive joints in laminated wood structures

Is society\u27s view of sexual harassment evolving along with new legal precedents?

This study was designed to investigate if society\u27s view of sexual harassment is evolving along with new legal precedents that include remedies for same-sex sexual harassment. By using an aggressive provocation questionnaire and varied scenarios where responses were recorded on a 5-point Likert scale assessing their perception of the level of sexual harassment depicted in the scenario. Thus examining the role of aggression in people\u27s perceptions of sexual harassment

An Architecture for Blockchain-based Collaborative Signature-based Intrusion Detection System

Collaborative intrusion detection system (CIDS), where IDS hosts work with each other and share resources, have been proposed to cope with the increasingly sophisticated cyberattacks. Despite the promising benefits such as expanded signature databases and alert data from multiple sites, trust management and consensus building remain as challenges for a CIDS to work effectively. The blockchain technology with built-in immutability and consensus building capability provides a viable solution to the issues of CIDS. In this paper, we introduce an architecture for a blockchain-enabled signature-based collaborative IDS, discuss the implementation strategy of the proposed architecture and developed a prototype using Hyperledger and Snort. Our preliminary evaluation on a bench mark showed the proposed architecture offers a solution by addressing the issues of trust, data sharing and insider attacks in the network environment of CIDSs. The implications and limitations of this study are also discussed

Linking Social Emotional Learning and Literacy

This capstone project explores the linkage between social emotional learning and literacy in a second-grade general education classroom. It provides details on the social emotional assessment tool, the Devereux Student Strengths Assessment (DESSA), and the literacy assessments, Fountas and Pinnell Benchmark Assessments and DIBELS 8th Edition Oral Reading Fluency Benchmark Assessments. This capstone discusses the social emotional literacy lessons that were implemented in the classroom between the collection of baseline and final data. It also reviews existing research that links social emotional learning and literacy. This capstone examines the results of this study and the direction future research should consider. This research finds that student reading levels and social emotional skills are directly related

Ekstraksi Dna Dan Amplifikasi Its Rdna Isolat Fungi Endofit Lbkurcc67 Umbi Tanaman Dahlia (Dahlia Variabilis)

> Endophyte fungi lives in the plant tissues without causing harm to their host and has known that can produce secondary metabolite and extracellular enzyme. Fungi LBKURCC67 is an endophyte fungi that was isolated from tubers of yellow flowered Dahlia variabilis in Padang Panjang, West Sumatera. Species of fungi LBKURCC67 isolate was not known exactly because the morphology identification has been previously is appropriate for genus level. The accurate identification to known species is molecular with phylogenetic analysis. Before determine species in molecular analysis, it must extraction and amplification DNA. This research aims to optimation of DNA extraction and rDNA amplification in Internal Transcribed Spacer (ITS) regions with Polymerase Chain Reactions (PCR) methods. The DNA of fungi LBKURCC67 isolate was extract with Wizard Genomic DNA Purification kit ex Promega Corp. (Madison, USA) from cultur mycelium. The result shows extraction DNA was success from fourth days mycelia. Optimum condition for rDNA amplification with PCR were used ITS5 and ITS4 primers and 41°C annealing temperature. Electrophoresis analysis shows molecular weight of DNA isolate is 16.951 bp and molecular weight of PCR product is 583 bp

Characterizing the Nonlinear Behavior of Flakeboards

To predict accurately the failure load of a layered flakeboard in bending, the stress-strain relations appropriate for each layer must be known. This paper describes the application of a method for characterizing the nonlinear behavior of a flakeboard material subjected to axial stresses. The model permits prediction of the stress-strain curve to the ultimate stress and ultimate strain points for the material regardless of fiber alignment or board density. Comparisons are made between traditional failure criteria, experimental results, and the model predictions

Population dynamics and genetic structure of Louisiana black bears in the Lower Mississippi Alluvial Valley of Louisiana

In 1992, the U.S. Fish and Wildlife Service granted the Louisiana black bear threatened status under the U.S. Endangered Species Act, listing loss and fragmentation of habitat as the primary threats. The 1995 Recovery Plan outlines recovery goals designed to meet the objective of reducing threats to the Louisiana black bear metapopulation and supporting habitat. To meet that objective, the Recovery Plan requires 1) at least 2 viable subpopulations, 1 each in the Tensas and Atchafalaya River Basins, 2) movement corridors between the 2 viable subpopulations, and 3) long-term protection of the habitat supporting each viable subpopulation and interconnecting corridors for delisting to occur. To address criteria 1 and 2, my objectives were 1) to estimate demographic rates of Louisiana black bear subpopulations, 2) to evaluate genetic structure and interchange of Louisiana black bear subpopulations, 3) to develop data-driven projection models to assess long-term persistence of individual subpopulations and the metapopulation in Louisiana, and 4) to determine how different model assumptions and parameter values affect estimates of long-term persistence. I used telemetry, den check data, and DNA-based capture-mark-recapture to demographic rates. Bayesian hierarchical modeling methods were used to estimate temporal process variance and parameter uncertainty. I developed stochastic population projection models based on estimates of demographic rates, process variances, and parameter uncertainty to estimate probabilities of persistence. I used 2 genetic clustering analyses to evaluate genetic structure among subpopulations in Louisiana and used 2 genetic assignment tests to measure interchange among subpopulations. Based on most projection models, estimates of persistence probabilities indicate that a viable subpopulation exists within the Tensas River Basin and within the Upper Atchafalaya River Basin. However, simulations under the most pessimistic set of assumptions suggested that the probability of extinction was slightly less than 95% for the Upper Atchafalaya (93%). Genetic analyses revealed that Louisiana black bear subpopulations were genetically distinct from each other and that contemporary gene flow is occurring between the Tensas River Basin and Upper Atchafalaya River Basin via a recently reintroduced population located between the two at the Three Rivers Complex. Those results suggest movement pathways currently exist between viable subpopulations