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Coincidence Point with Application to Stability of Iterative Procedure in Cone Metric Spaces
Get PDFWe obtain necessary conditions for the existence of coincidence point and common fixed point for contractive mappings in cone metric spaces. An application to the stability of J-iterative procedure for mappings having coincidence point in cone metric spaces is also given
An investigation of the corrosion behaviour of a FeNiCoAlTa shape memory alloy in 3.5 wt-% NaCl solution
No full textIn this study, the corrosion behaviour of an FeNiCoAlTa (NCAT) shape memory alloy in 3.5% (w w−1) NaCl solution was evaluated. Linear polarisation resistance and potentiodynamic polarisation tests were conducted at 25°C. An open circuit potential (OCP) of −381 mV (vs. saturated calomel reference electrode) and a corrosion rate (CR) of 0.0174 mm y−1 were obtained. The NCAT alloy did not show any passivation in the 3.5% (w w−1) NaCl solution. Its corrosion behaviour was very similar to that of G10180 (AISI 1018) carbon steel with the NCAT showing a lower CR and a less active OCP. Its corrosion in the solution was a combination of general dissolution and localised attack (pitting). Aging heat treatment caused β-Ni3Al phase, and tantalum to precipitate on the grain boundaries, resulting in chemical species segregation between the grain boundaries and the grains. The chemical segregation caused intergranular corrosion of the alloy
Cooperative deterministic learning control of multi-robot manipulators
No full textThis paper addresses the learning control problem for a group of robot manipulator systems in the presence of homogeneous nonlinear uncertain dynamics, where all the robots have an identical system structure but the reference signals to be tracked are different. Our control law has two objectives: one is tracking control, and the other is learning/identification. To this end, deterministic learning theory is incorporated with consensus theory to find a common neural network (NN) approximation of the nonlinear uncertain dynamics for the multi-robot system. Specifically, we first present a control scheme called cooperative deterministic learning using adaptive NNs to enable the robotic agents to track their respective reference trajectories on one hand, and to exchange their estimated NN weights online through networked communication on the other. As a result, a consensus about one common NN approximation for the nonlinear uncertain dynamics is achieved for all the agents. Thus, the trained distributed NNs have better generalization capability than those obtained by existing techniques. Numerical simulations on a team of two-degrees-of-freedom robot manipulators have been conducted to demonstrate the effectiveness of the proposed results
Proteomic landscape of seminal plasma associated with dairy bull fertility
No full textMale fertility is the ability of sperm to fertilize the egg and sustain embryo development. Several factors determine the fertilizing capacity of mammalian sperm, including those intrinsic to sperm and components of the seminal plasma. The present study analyzed the seminal fluid proteome of Bos taurus and potential associations between proteins and fertility scores. Mass spectrometry coupled with nano HPLC allowed the identification of 1,159 proteins in the dairy bull seminal plasma. There were 50 and 29 seminal proteins more abundant in high (HF) low fertility (LF) bulls, respectively. Based on multivariate analysis, C-type natriuretic peptide, TIMP-2, BSP5 and sulfhydryl oxidase indicated relationship with HF bulls. Clusterin, tissue factor pathway inhibitor 2, galectin-3-binding protein and 5′-nucleotidase were associated with LF bulls. Abundance of NAD(P)(+)-arginine ADP-ribosyltransferase, prosaposin and transmembrane protein 2 proteins had the highest positive correlations with fertility ranking. Quantities of vitamin D-binding protein, nucleotide exchange factor SIL1 and galectin-3-binding protein showed the highest negative correlations with fertility ranking. A fertility ranking score was calculated and the relationship with these proteins was significant (Spearman’s rho = 0.94). The present findings represent a major and novel contribution to the study of bovine seminal proteins. Indicators of fertility can be used to improve reproductive biotechnologies
Alfred N. Poindexter Veterinary Hospital - 1925
No full textThis facility was designed to house the animal science laboratories, the veterinarian hospital, and the animal husbandry classrooms. The Alfred N. Poindexter Veterinary Hospital is on the National Register of Historic Places (Date Issued: June 3, 1999). The legendary Dr. Alfred Nelson Poindexter served the university for nearly 60 years. Constructed 1925; Renovated 1972 (designed by PVAMU alumnus Louis E. Fry, class of 1922); Dedicated March 4, 2016.https://digitalcommons.pvamu.edu/preservation-week-2018/1015/thumbnail.jp
Psychiatry\u27s Role in the Management of Human Trafficking Victims: An Integrated Care Approach
No full textHuman trafficking is an outrageous human rights violation with potentially devastating consequences to individuals and the public health. Victims are often underrecognized and there are few guidelines for how best to identify, care for, and safely reintegrate victims back into the community. The purpose of this paper is to propose a multifaceted, interdisciplinary, and interprofessional guideline for providing care and services to human trafficking victims. Databases such as PubMed and PsycINFO were searched for papers outlining human trafficking programs with a primary psychiatric focus. No integrated care models that provide decisional guidelines at different points of intervention for human trafficking patients and that highlight the important role of psychiatric consultation were found. Psychiatrists and psychologists are pivotal to an integrated care approach in health care settings. The provision of such a comprehensive and integrated model of care should facilitate the identification of victims, promote their recovery, and reduce the possibility of retraumatization
Building intelligent conversational tutors and mentors for team collaborative problem solving: Guidance from the 2015 program for international student assessment
No full textThis chapter describes how conversational computer agents have been used in collaborative problem-solving environments. These agent-based systems are designed to (a) assess the students’ knowledge, skills, actions, and various other psychological states on the basis of the students’ actions and the conversational interactions, (b) generate discourse moves that are sensitive to the psychological states and the problem states, and (c) advance a solution to the problem. We describe how this was accomplished in the Programme for International Student Assessment (PISA) for Collaborative Problem Solving (CPS) in 2015. In the PISA CPS 2015 assessment, a single human test taker (15-year-old student) interacts with one, two, or three agents that stage a series of assessment episodes. This chapter proposes that this PISA framework could be extended to accommodate more open-ended natural language interaction for those languages that have developed technologies for automated computational linguistics and discourse. Two examples support this suggestion, with associated relevant empirical support. First, there is AutoTutor, an agent that collaboratively helps the student answer difficult questions and solve problems. Second, there is CPS in the context of a multi-party simulation called Land Science in which the system tracks progress and knowledge states of small groups of 3 4 students. Human mentors or computer agents prompt them to perform actions and exchange open-ended chat in a collaborative learning and problem-solving environment
Exploring patterns of personal growth initiative and posttraumatic stress: A latent profile analysis
No full textObjective: This study examined the inconsistent relationship found between personal growth initiative (PGI) and posttraumatic stress symptoms (PTSS) by exploring potential subgroups. In addition, after identifying the subgroups, potential predictors of these subgroups were examined. Participants: Participants were 534 undergraduate students who experienced a potentially traumatic event (PTE). Data collection occurred from March 2013 to December 2014. Methods: Because this was a preliminary study, archival data was used. Participants consisted of students who experienced a PTE within the past three years. Results: Latent profile analysis indicated a five-class model as the best-fitting model. Direct exposure and intentionality of the event were significant predictors of class membership; length of time since event and gender did not predict class membership. Conclusions: The current study provides a potential explanation of the inconsistent results between PGI and PTSS and also highlights the importance of acknowledging subgroups when utilizing PGI after a PTE
Acetylation and methylation of sperm histone 3 lysine 27 (H3K27ac and H3K27me3) are associated with bull fertility
No full textSummary: Epigenetic modifications in histones are crucial for proper sperm physiology, egg activation and reproductive development of males. The objectives of this study were to determine the conservation and interactomes of histone three (H3) and ascertain the expression dynamics of acetylated and methylated H3 lysine 27 (H3K27ac and H3K27me3) in spermatozoa from Holstein bulls with different fertility. Methods in immunocytochemistry and flow cytometry were used to evaluate the expression dynamics of H3K27ac and H3K27me3 in spermatozoa from 10 bulls with different in vivo fertility. Computational biology methods including Clustal Omega and Cytoscape were performed to determine the evolutionary conservation and interactome of H3. The post-translational modifications (PTM) of H3 (H3K27ac and H3K27me3) had different spatiotemporal dynamics in the sperm head. Intensities of methylation were higher than those of acetylation and inversely correlated between the two fertility groups (p =.0032). The interacting proteins of H3 are involved in critical subcellular processes such as regulation of methylation, nucleosome assembly, regulation of DNA replication and chromatin assembly. These results are significant because they help advance fundamental science and biotechnology of mammalian reproduction
Luckie Hall Men\u27s and Women\u27s Dormitory- 1909
No full textThis building served as both a male and female residence hall during its year of occupancy. It was named in honor of C.W. Luckie, 1889-1909. He was vice-principal, treasurer, and professor of English and Latin. Construction 1909.https://digitalcommons.pvamu.edu/preservation-week-2018/1019/thumbnail.jp