Does species interference play a role in habitat preference of the freshwater snails Elimia livescens and Planorbella campanulata?

General EcologyHabitat selection is an important mechanism for the determination of the realized niche, which may be influenced by factors such as nutrient availability or interference. This project explores the habitat selection and interactions of two freshwater snail species E. livescens and P.campanulata, found in Douglas Lake, Michigan. Substrate preference of each species was examined, both alone and in the presence of the other species. Our findings suggest that interference is occurring between the two snail species since the substrate preference of E. livescens changed in the presence of P. campanulata.http://deepblue.lib.umich.edu/bitstream/2027.42/89583/1/Igra_Kiel_Clark_2011.pd

THE INFLUENCE OF BOARD OF COMMISSIONERS' CHARACTERISTICS ON EARNING MANAGEMENT (The Case of Banking Company Listed in Jakarta Stock Exchange)

This study observes obout the influence of Board of Commissioners' characteristics such as, Board of Commissioners' size, composition, and annual meeting on the earnings management practice in public bank companies listed in Indonesia Stock Exchange in 2003-2005. Result show that Board of Commissioners' size has negative significant influence on earning management in banking company as a whole and in small company Board of Commissioners' composition is insignificantly influencing the earning management in all conditions and Board of Commissioners' annual meeting has significant negative influence to earning management as a whole, but it found to be insignificant in big and small company. These results mean that board of commissioners'function in monitoring and supervising the fficiency of monagement does not have big influence on earning management practice done by banking compony listed in Indonesia Stock Exchange

Knots and Chaos in the R\"ossler System

The R\"ossler System is one of the best known chaotic dynamical systems, exhibiting a plethora of complex phenomena - and yet, only a few studies tackled its complexity analytically. In this paper we find sufficient conditions for the existence of chaotic dynamics for the R\"ossler System. This will allow us to prove the existence of infinitely many periodic trajectories for the flow, and determine their knot types.Comment: 58 pages, 56 figure

One Dimensional Dynamics and the R\"ossler attractor

The R\"ossler system is one of the best known chaotic dynamical systems, generating a chaotic attractor which, by the numerical evidence, arises by a period-doubling route to chaos. In this paper we state and prove a topological criterion for the existence of an attractor for the R\"ossler system - and then analyze the dynamics of the non-wandering set by reducing the flow to the dynamics of a well-known one dimensional model: the Quadratic Family, $x^2+c$, $-2\leq c\leq\frac{1}{4}$

Topological lower bounds for the R\"ossler System

The R\"ossler System is one of the best known chaotic dynamical systems, exhibiting a plethora of complex phenomena - and yet, only a few studies tackled its complexity analytically. Building on previous work by the author, in this paper we characterize the dynamical complexity for the R\"ossler System at parameter values at which the flow satisfies a certain heteroclinic condition. This will allow us to characterize the knot type of infinitely many periodic trajectories for the flow - and reduce the R\"ossler system to a simpler hyperbolic flow, capturing its essential dynamics.Comment: 24 pages, 32 figure

Adults with spontaneous aerobic Gram-negative bacillary meningitis admitted to the intensive care unit

ABSTRACTThe characteristics of spontaneous aerobic Gram-negative bacillary meningitis (AGNBM) were determined in 40 adults requiring admission to an intensive care unit (ICU) during a 16-year period in ten French ICUs. Eight infections were hospital-acquired and most patients had predisposing factors, mainly chronic alcoholism and an immunocompromised status. Three immunosuppressed patients had disseminated strongyloidiasis. Gram's stain, cerebrospinal fluid and blood cultures were positive for 85%, 98% and 80% of cases, respectively. Escherichia coli (57%) and Klebsiella pneumoniae (17%) were the most frequent pathogens. In-ICU mortality was 38%. Spontaneous AGNBM is a rare complication of bacteraemia in adults. The severity of predisposing underlying diseases might explain the poor prognosis despite appropriate antimicrobial therapy

Urinary ATP as an indicator of infection and inflammation of the urinary tract in patients with lower urinary tract symptoms

BACKGROUND: Adenosine-5'-triphosphate (ATP) is a neurotransmitter and inflammatory cytokine implicated in the pathophysiology of lower urinary tract disease. ATP additionally reflects microbial biomass thus has potential as a surrogate marker of urinary tract infection (UTI). The optimum clinical sampling method for ATP urinalysis has not been established. We tested the potential of urinary ATP in the assessment of lower urinary tract symptoms, infection and inflammation, and validated sampling methods for clinical practice. METHODS: A prospective, blinded, cross-sectional observational study of adult patients presenting with lower urinary tract symptoms (LUTS) and asymptomatic controls, was conducted between October 2009 and October 2012. Urinary ATP was assayed by a luciferin-luciferase method, pyuria counted by microscopy of fresh unspun urine and symptoms assessed using validated questionnaires. The sample collection, storage and processing methods were also validated. RESULTS: 75 controls and 340 patients with LUTS were grouped as without pyuria (n = 100), pyuria 1-9 wbc ?l(-1) (n = 120) and pyuria ?10 wbc ?l(-1) (n = 120). Urinary ATP was higher in association with female gender, voiding symptoms, pyuria greater than 10 wbc ?l(-1) and negative MSU culture. ROC curve analysis showed no evidence of diagnostic test potential. The urinary ATP signal decayed with storage at 23°C but was prevented by immediate freezing at ??-20°C, without boric acid preservative and without the need to centrifuge urine prior to freezing. CONCLUSIONS: Urinary ATP may have a role as a research tool but is unconvincing as a surrogate, clinical diagnostic marker

PENGEMBANGAN ALAT EVALUASI MENGGUNAKAN MEDIA QUIZIZZ BERBASIS PAPERMODE DI SDN TUNDAGAN

This study was intended to make an evaluation tool using Quizizz based on Papermode to improve the motivation and learning outcomes of fourth-grade students in IPAS at SDN Tundagan. The issues addressed include the limited variety of evaluation methods and student engagement in learning, with the expectation of providing an effective solution. This study employs the Research and Development (R&D) methodology with the ADDIE model, which includes analysis, design, development, implementation, and evaluation. Data were gathered from interviews, questionnaires, and observations of students and teachers. Validation was conducted by experts in media, content, and technology to ensure the suitability and effectively of the evaluation tool that was developed. The findings showed that the evaluation tool using the Quizizz-based Papermode media was deemed highly suitable, with a validation percentage of 96.67% by media experts, 94.00% by technology experts, and 92.00% by content experts. Students gave a positive response with a score of 91.63%, indicating an enhancement in motivation and engagement in IPAS learning in the fourth grade at SDN Tundagan. By this research, it is identified that the Quizizz-based Papermode evaluation tool effectively enhances student motivation and learning outcomes in the fourth grade for the IPAS subject. It is recommended that teachers utilize this media regularly and incorporate visual elements to capture students' attention, as well as provide training to optimize the use of technology in learning