6,673 research outputs found
Directional selection effects on patterns of phenotypic (co)variation in wild populations.
Phenotypic (co)variation is a prerequisite for evolutionary change, and understanding how (co)variation evolves is of crucial importance to the biological sciences. Theoretical models predict that under directional selection, phenotypic (co)variation should evolve in step with the underlying adaptive landscape, increasing the degree of correlation among co-selected traits as well as the amount of genetic variance in the direction of selection. Whether either of these outcomes occurs in natural populations is an open question and thus an important gap in evolutionary theory. Here, we documented changes in the phenotypic (co)variation structure in two separate natural populations in each of two chipmunk species (Tamias alpinus and T. speciosus) undergoing directional selection. In populations where selection was strongest (those of T. alpinus), we observed changes, at least for one population, in phenotypic (co)variation that matched theoretical expectations, namely an increase of both phenotypic integration and (co)variance in the direction of selection and a re-alignment of the major axis of variation with the selection gradient
Theatrical Apartment
https://openscholarship.wustl.edu/bcs/1336/thumbnail.jp
Frequency versus relaxation oscillations in a semiconductor laser with coherent filtered optical feedback
We investigate the dynamics of a semiconductor laser subject to coherent delayed filtered optical feedback. A systematic bifurcation analysis reveals that this system supports two fundamentally different types of oscillations, namely relaxation oscillations and external roundtrip oscillations. Both occur stably in large domains under variation of the feedback conditions, where the feedback phase is identified as a key quantity for controlling this dynamical complexity. We identify two separate parameter regions of stable roundtrip oscillations, which occur throughout in the form of pure frequency oscillations
Role of Simulations in the Thai Graduate Business English Program: Can They Engage and Elicit Learnersâ Realistic Use of Specific Language?
This research paper aims at exploring the views of Thai adult learners enrolling in the one-year Graduate Diploma Program in English for Business and Management (EBM), Thammasat University, on the use of business simulations in terms of their realistic nature, level of engagement, and usefulness. In addition to the learnersâ views, outcomes of four different simulated meeting tasks conducted by a group of four learners were analyzed to explore how realistic patterns of interaction used in those simulations were. The hypothesis of this study is that if the learners find the simulated tasks engaging and representative of the real-world contexts, they are likely to focus on using specific and work-related language to fulfill the task purposes. In-depth interviews with a total of eight EBM students and audio-recordings of simulated meetings were the main data collection methods of this qualitative study. Discussion of the findings led to the conclusion that simulations strived to elicit the use of language which was similar to the authentic generic patterns found in the real worldâ business meetings. It further pointed out that the participants believed simulations were likely to assist them in improving their use of specific language to achieve their real-world business operations
Efficiency of Two Black-tailed Prairie Dog Rodenticides and Their Impacts on Non-target Bird Species
In 1983 zinc phosphide, strychnine with prebait, and strychnine without prebait were applied to black-tailed prairie dog (Cynomys ludovicianus) colonies in west-central South Dakota. Short-term (4 days later) and long-term (1 year later) poison efficiency and impact (short-term and long-term) on horned larks (Eromophila alpestrus) and other seed-eating birds of the prairie dog colonies were evaluated. Prairie dog burrow densities ranged from 54-187 burrows/ha with an average burrow density of 114 Âą8 (Âą SE) burrows/ha. Rodenticide short-term control reduced active burrows by 95% with zinc phosphide, 42% with only strychnine, and 78% with prebaited strychnine. More zinc phosphide was consumed after poisoning than strychnine. Long-term control was maintained with prebaited strychnine and zinc phosphide but not with strychnine only. Fifty species of birds were observed. Immediate impacts with poisons reduced horned lark relative densities 66% with strychnine only and 45% with prebaited strychnine. No measurable reduction was found with zinc phosphide. No direct long-term impacts on horned larks were found. Indirect impacts occurred on horned larks through habitat changes from prairie dog control. No short-term or long-term poison impacts were found on the seed-eating avian group
Thai Learnersâ Construction of Disability Identity in their Website Project: Transitivity Analysis of Process Types
A critical approach to discourse analysis can provide valuable insight into language as a social semiotic system, the discursive construction of identity and the operations of ideology and power. The purpose of this study is twofold. Firstly, it aims to explore process types constituting the transitivity system of language Thai undergraduates employed to enact the identities of the Baan Nontapum Foundation (BNF) or Home for Children with Disabilities, and disability in their website project. Secondly, the study attempts to further examine how and why those discursive strategies were utilized. Relying on Faircloughâs Critical Discourse Analysis and Hallidayâs Systemic Functional Linguistics, a critical analysis of the discourse revealed the participantsâ utilization of material processes to be far more frequent than other process types. Additionally, the Actor was found to be the participant function associated with the BNF, whereas the Goal and the Beneficiary were most frequently linked with disabled children. This transitivity analysis of process types and participant roles discloses that the BNF plays the role of an active agent that initiates and offers different forms of assistance to disabled children who do not seem to have any strong agency to voice their needs. In spite of being expected to be able to live independently, children with disabilities are represented as those who solely receive assistance which is assumed to be useful for them by others in the society.Keywords: critical discourse analysis, disability discourse, identity, process types, systemic functional linguistics, transitivity analysis.  āļāļēāļĢāļāļĢāļ°āļāļāļāļŠāļĢāđāļēāļāļāļąāļāļĨāļąāļāļĐāļāđāļāļ§āļēāļĄāļāļīāļāļēāļĢāđāļāđāļāļĢāļāļāļēāļāļŠāļĢāđāļēāļāđāļ§āđāļāđāļāļāđāļāļāļāļāļąāļāļĻāļķāļāļĐāļēāđāļāļĒāļĢāļ°āļāļąāļāļāļĢāļīāļāļāļēāļāļĢāļĩ : āļāļēāļĢāļ§āļīāđāļāļĢāļēāļ°āļŦāđāļāļĢāļ°āđāļ āļāļāļāļāļāļĢāļ°āļāļ§āļāļāļēāļĢ (Process Types)āļāļāļāļąāļāļĒāđāļāļ§āļēāļāļāļĢāļĢāļĄāļ§āļīāđāļāļĢāļēāļ°āļŦāđāđāļāļīāļāļ§āļīāļāļēāļāļĐāđāđāļāđāļāļāļĪāļĐāļāļĩāļāļąāļāļāļģāļĄāļēāļāļķāđāļāļĄāļļāļĄāļĄāļāļāđāļāļīāļāļĨāļķāļāđāļāļĩāđāļĒāļ§āļāļąāļāļāļēāļĢāļĻāļķāļāļĐāļēāļ āļēāļĐāļēāđāļāļāļēāļāļ°āļāļĩāđāđāļāđāļāļĢāļ°āļāļāļāļāļāļŠāļąāļāļĨāļąāļāļĐāļāđāđāļāļīāļāļŠāļąāļāļāļĄ āđāļāđāļāđāļāļĢāļ·āđāļāļāļĄāļ·āļāđāļāļāļēāļĢāļāļĢāļ°āļāļāļāļŠāļĢāđāļēāļāļāļąāļāļĨāļąāļāļĐāļāđāđāļĨāļ°āļāļģāļĢāļāļāļāđāļ§āđāļāļķāđāļāļāļģāļāļēāļāđāļĨāļ°āļāļļāļāļĄāļāļēāļĢāļāđ āļāļēāļāļ§āļīāļāļąāļĒāļāļĩāđāļĄāļĩāļ§āļąāļāļāļļāļāļĢāļ°āļŠāļāļāđāļŦāļĨāļąāļāļŠāļāļāļāļĢāļ°āļāļēāļĢ āđāļāđāđāļāđ (āđ) āļĄāļļāđāļāđāļāđāļāļĻāļķāļāļĐāļēāļāļĢāļ°āđāļ āļāļāļāļāļāļĢāļ°āļāļ§āļāļāļēāļĢ āļŦāļĢāļ·āļ process types āļāļĩāđāđāļāđāļāļŠāđāļ§āļāļŦāļāļķāđāļāļāļāļāļ āļēāļāđāļŠāļāļāđāļāļāļĢāļ°āđāļĒāļāļāļĩāđāļāļąāļāļĻāļķāļāļĐāļēāđāļāļĒāļĢāļ°āļāļąāļāļāļĢāļīāļāļāļēāļāļĢāļĩāđāļāđāđāļāļāļēāļĢāļāļĢāļ°āļāļāļāļŠāļĢāđāļēāļāļāļąāļāļĨāļąāļāļĐāļāđāļāļāļāļāđāļēāļāđāļāđāļāļāļīāļāļēāļĢāļāļāļāļ āļđāļĄāļīāđāļĨāļ°āļāļąāļāļĨāļąāļāļĐāļāđāļāļ§āļēāļĄāļāļīāļāļēāļĢāđāļāđāļāļĢāļāļāļēāļāļŠāļĢāđāļēāļāđāļ§āđāļāđāļāļāđāđāļŦāđāđāļāđāļŦāļāđāļ§āļĒāļāļēāļāļāļąāļāļāļĨāđāļēāļ§ (āđ) āļ§āļīāđāļāļĢāļēāļ°āļŦāđāļ§āđāļēāđāļŦāļāļļāđāļāđāļĨāļ°āļāļĒāđāļēāļāđāļĢāļāļĢāļ°āđāļ āļāļāļāļāļāļĢāļ°āļāļ§āļāļāļēāļĢ āļŦāļĢāļ·āļ process types āļāļĢāļ°āđāļ āļāļāļąāđāļāđāļāļķāļāđāļāđāļāļģāļĄāļēāđāļāđāđāļāļāļēāļĢāļāļĢāļ°āļāļāļāļŠāļĢāđāļēāļāļāļąāļāļĨāļąāļāļĐāļāđāļāļąāļāļāļĨāđāļēāļ§Â āļāļēāļāļ§āļīāļāļąāļĒāļāļĩāđāđāļāđāđāļāđāļāļĪāļĐāļāļĩāļ§āļēāļāļāļĢāļĢāļĄāļ§āļīāđāļāļĢāļēāļ°āļŦāđāđāļāļīāļāļ§āļīāļāļēāļāļĐāđāļāļāļāļāļāļĢāđāđāļĄāļ āđāļāļĢāđāļāļĨāļąāļ (Norman Fairclough) āđāļĨāļ°āļāļĪāļĐāļāļĩāđāļ§āļĒāļēāļāļĢāļāđāļĢāļ°āļāļāđāļĨāļ°āļŦāļāđāļēāļāļĩāđāļāļāļāđāļĄāđāļāļīāļĨ āļŪāļāļĨāļĨāļīāđāļāļĒāđ (M.A.K. Halliday) āļĄāļēāđāļāđāđāļāđāļāļāļąāđāļāļāļĪāļĐāļāļĩāđāļĨāļ°āļ§āļīāļāļĩāļ§āļīāļāļĒāļē āļāļĨāļāļēāļĢāļĻāļķāļāļĐāļēāļāļāļ§āđāļēāļāļĨāļļāđāļĄāļāļĢāļ°āļāļēāļāļĢāļāļąāļ§āļāļĒāđāļēāļāđāļāđ material processes āļĄāļēāļāļāļ§āđāļē process types āļāļĢāļ°āđāļ āļāļāļ·āđāļ āļāļāļāļāļēāļāļāļĩāđ āļĒāļąāļāļāļāļ§āđāļē Actor āđāļāđāļāļāļĢāļ°āđāļ āļāļāļāļāļāļđāđāđāļŠāļāļāļāļĩāđāļāļđāļāļāļģāļĄāļēāđāļāđāđāļŠāļāļāļ āļēāļāļāļāļāļāđāļēāļāđāļāđāļāļāļīāļāļēāļĢ āđāļāļāļāļ°āļāļĩāđ Goal āđāļĨāļ° Beneficiary āđāļāđāļāļāļĢāļ°āđāļ āļāļāļāļāļāļđāđāđāļŠāļāļāļāļĩāđāļāļĨāļļāđāļĄāļāļĢāļ°āļāļēāļāļĢāđāļāđāļāļģāđāļŠāļāļāļāļāļāļēāļāļāļāļāđāļāđāļāļāļīāļāļēāļĢ āļāļēāļĢāļ§āļīāđāļāļĢāļēāļ°āļŦāđ process types āđāļĨāļ° āļāļāļāļēāļāļāļāļāļāļđāđāđāļŠāļāļāđāļāļāļĢāļ°āđāļĒāļāļŠāļ°āļāđāļāļāđāļŦāđāđāļŦāđāļāļ§āđāļēāļŦāļāđāļ§āļĒāļāļēāļāļāđāļēāļāđāļāđāļāļāļīāļāļēāļĢāļāļđāļāļāļģāđāļŠāļāļāđāļāļāļēāļāļ°āļŦāļāđāļ§āļĒāļāļēāļāļāļĩāđāļĄāļĩāļāļ§āļēāļĄāļāļĢāļ°āļāļ·āļāļĢāļ·āļāļĢāđāļāđāļāļāļēāļĢāļĢāļīāđāļĢāļīāđāļĄāļāļēāļĢāđāļŦāđāļāļ§āļēāļĄāļāđāļ§āļĒāđāļŦāļĨāļ·āļāļŦāļĨāļēāļāļŦāļĨāļēāļĒāļĢāļđāļāđāļāļāđāļāđāļāļĨāļļāđāļĄāđāļāđāļāļāļīāļāļēāļĢ āđāļāļāļāļ°āļāļĩāđāđāļāđāļāļāļīāļāļēāļĢāđāļāđāļāļđāļāļāļģāđāļŠāļāļāđāļāļĨāļąāļāļĐāļāļ°āļāļĩāđāđāļĢāđāļāļ§āļēāļĄāļāļąāļāđāļāļāđāļāļāļ§āļēāļĄāļāđāļāļāļāļēāļĢāļāļāļāļāļāđāļāļ āļāļķāļāđāļĄāđāļ§āđāļēāļŠāļąāļāļāļĄāļāļ°āļĄāļĩāļāļ§āļēāļĄāļāļēāļāļŦāļ§āļąāļāđāļāđāļāļīāļāļāļ§āļāļāđāļāđāļāđāļāļāļīāļāļēāļĢ āļ§āđāļēāđāļāđāļāļāļĨāļļāđāļĄāļāļļāļāļāļĨāļāļĩāđāļŠāļēāļĄāļēāļĢāļāļāļ°āļāļąāļāļāļēāļāļāđāļāļāđāļĨāļ°āļāļģāļĢāļāļāļĒāļđāđāđāļāļŠāļąāļāļāļĄāđāļāđāļāļĒāđāļēāļāļāļīāļŠāļĢāļ° āļ āļēāļāļāļąāļ§āđāļāļāļāļāļāđāļāđāļāļāļīāļāļēāļĢāļāļĩāđāļāļđāļāļŠāļĢāđāļēāļāļāļķāđāļāļĒāļąāļāļāļāļŠāļ°āļāđāļāļāđāļāđāđāļāļĩāļĒāļāļāļ§āļēāļĄāļāđāļāļāļāļēāļĢāļāļ§āļēāļĄāļāđāļ§āļĒāđāļŦāļĨāļ·āļāļāļāļāđāļāđāļāļāļīāļāļēāļĢāļāļēāļāļāļĨāļļāđāļĄāļāļļāļāļāļĨāļāļ·āđāļāđ āļāļķāđāļāļĄāļāļāļāļ§āļēāļĄāļāđāļ§āļĒāđāļŦāļĨāļ·āļāļāļēāļāļĄāļļāļĄāļāļĩāđāļŠāļąāļāļāļĄāđāļŦāđāļāļ§āđāļēāđāļāđāļāļāļĢāļ°āđāļĒāļāļāđ āđāļĄāđāđāļāđāļĄāļēāļāļēāļāļĄāļļāļĄāļĄāļāļāđāļĨāļ°āļāļ§āļēāļĄāļāđāļāļāļāļēāļĢāļāļāļāļāļąāļ§āđāļāđāļāļāļīāļāļēāļĢāđāļāđāļāļĒāđāļēāļāđāļāļāļģāļŠāļģāļāļąāļ āļ§āļēāļāļāļĢāļĢāļĄāļ§āļīāđāļāļĢāļēāļ°āļŦāđāđāļāļīāļāļ§āļīāļāļēāļāļĐāđ āļ§āļēāļāļāļĢāļĢāļĄāļāļ§āļēāļĄāļāļīāļāļēāļĢ āļāļąāļāļĨāļąāļāļĐāļāđ āļāļĢāļ°āđāļ āļāļāļāļāļāļĢāļ°āļāļ§āļāļāļēāļĢ āđāļ§āļĒāļēāļāļĢāļāđāļĢāļ°āļāļāđāļĨāļ°āļŦāļāđāļēāļāļĩāđ āļāļēāļĢāļ§āļīāđāļāļĢāļēāļ°āļŦāđ transitivityÂ
Ottimizzazione aerodinamica di soffiaggi sul fondo di un'autovettura ad elevate prestazioni
In tale lavoro di tesi viene implementata una procedura di ottimizzazione per lo studio del soffiaggio sul fondo di un'autovettura ad elevate prestazioni al fine di incrementarne il carico aerodinamico. Inoltre sono stati analizzati i risultati ottenuti con lo scopo di compredere la fisica di base del problema in esame. I software utilizzati nella procedura di ottimizzazione sono modeFrontierÂŪ, MatlabÂŪ, CatiaÂŪ, GambitÂŪ e Ansys-FluentÂŪ
Pathologic Features of Behçet's Disease in the Tubuler Gut
Behçet's disease (BD) is a vasculitic disorder of relapsing acute inflammation characterized by recurrent oral ulcers, genital ulcers, uveitis, and skin lesions. The disease also affects other organs, including joints, the nervous system, blood vessels, and gastrointestinal (GI) system may also be involved and the lower GI tract is the mostly involved part, leading to severe morbidity. The frequency of GI involvement in BD varies among different ethnic groups. Although 50â60% of Japanese patients have GI disease, these manifestations are rare in patients from Mediterranean countries. The gastrointestinal manifestations of BD usually appear 4.5â6 years after the onset of the oral ulcers. The intestinal lesions are usually resistant to medical treatment and recur after surgery. The elementary lesion is apthous ulcer. Deep, round or oval ulcers with a punched-out appearance tend to perforate easily, so that many patients require urgent operation
- âĶ