Nodulation and performance of exotic and native legumes in Australian soils

2003 ◽  
Vol 51 (5) ◽  
pp. 543 ◽  
Author(s):  
María A. Pérez-Fernández ◽  
Byron B. Lamont
Keyword(s):  
Native Species ◽  
Treated Soil ◽  
Retama Sphaerocarpa ◽  
Australian Species ◽  
And Performance ◽  
Natural Stands ◽  
High Degree ◽  
Western Australian ◽  
Cytisus Balansae ◽  
New Habitats

Six Spanish legumes, Cytisus balansae, C. multiflorus, C. scoparius, C. striatus, Genista hystrix and Retama sphaerocarpa, were able to form effective nodules when grown in six south-western Australian soils. Soils and nodules were collected from beneath natural stands of six native Australian legumes, Jacksonia floribunda, Gompholobium tomentosum, Bossiaea aquifolium, Daviesia horrida, Gastrolobium spinosum and Templetonia retusa. Four combinations of soils and bacterial treatments were used as the soil treatments: sterile soil (S), sterile inoculated soils (SI), non-treated soil (N) and non-treated inoculated soils (NI). Seedlings of the Australian species were inoculated with rhizobia cultured from nodules of the same species, while seedlings of the Spanish species were inoculated with cultures from each of the Australian species. All Australian rhizobia infected all the Spanish species, suggesting a high degree of 'promiscuity' among the bacteria and plant species. The results from comparing six Spanish and six Australian species according to their biomass and total nitrogen in the presence (NI) or absence (S) of rhizobia showed that all species benefitted from nodulation (1.02–12.94 times), with R.�sphaerocarpa and C. striatus benefiting more than the native species. Inoculation (SI and NI) was just as effective as, or more effective than the non-treated soil (i.e. non-sterile) in inducing nodules. Nodules formed on the Spanish legumes were just as efficient at fixing N2 as were those formed on the Australian legumes. Inoculation was less effective than non-treated soil at increasing biomass but just as effective as the soil at increasing nitrogen content. Promiscuity in the legume–bacteria symbiosis should increase the ability of legumes to spread into new habitats throughout the world.

scholarly journals Cross-section instability in financial markets: impatience, extrapolation, and switching

2021 ◽  
Author(s):  
Roberto Dieci ◽  
Xue-Zhong He
Keyword(s):  
Financial Markets ◽  
Cross Section ◽  
Asset Price ◽  
Asset Market ◽  
Long Run ◽  
Short Run ◽  
And Performance ◽  
Equilibrium Market ◽  
High Degree ◽  
Fundamental Price

AbstractThis paper presents a stylized model of interaction among boundedly rational heterogeneous agents in a multi-asset financial market to examine how agents’ impatience, extrapolation, and switching behaviors can affect cross-section market stability. Besides extrapolation and performance based switching between fundamental and extrapolative trading documented in single asset market, we show that a high degree of ‘impatience’ of agents who are ready to switch to more profitable trading strategy in the short run provides a further cross-section destabilizing mechanism. Though the ‘fundamental’ steady-state values, which reflect the standard present-value of the dividends, represent an unbiased equilibrium market outcome in the long run (to a certain extent), the price deviation from the fundamental price in one asset can spill-over to other assets, resulting in cross-section instability. Based on a (Neimark–Sacker) bifurcation analysis, we provide explicit conditions on how agents’ impatience, extrapolation, and switching can destabilize the market and result in a variety of short and long-run patterns for the cross-section asset price dynamics.

Evaluation of Clinical Competence: The Gap Between Expectation and Performance

PEDIATRICS ◽  
1996 ◽  
Vol 97 (2) ◽  
pp. 179-184
Author(s):  
Bahman Joorabchi ◽  
Jeffrey M. Devries
Keyword(s):  
Descriptive Analysis ◽  
Data Gathering ◽  
Community Based ◽  
Resident Performance ◽  
Faculty Expectations ◽  
Clinical Evaluations ◽  
Pediatric Residency ◽  
Objective Structured Clinical Examinations ◽  
And Performance ◽  
High Degree

Objective. To evaluate a 3-year experience with the Objective Structured Clinical Examinations (OSCEs) and to compare faculty expectations with resident performance. Design. Descriptive analysis of measures of resident performance. Setting. Community-based pediatric residency program in Michigan. Participants. One hundred twenty-six pediatric residents at all levels of training. Methods. The three examinations consisted of 36 to 42 5-minute stations, testing skills in physical examination, history, counseling, telephone management, and test interpretation. A committee of faculty and chief residents predetermined minimum pass levels for each resident level. Results were compared with other indices of resident performance. Results. There was evidence for content, construct, and concurrent validity, as well as a high degree of reliability. However, 40% to 96% of residents scored below the minimum pass levels for their levels. In each examination, third-year residents had the highest failure rates, yet they scored well on the American Board of Pediatrics in-training examination and on their monthly clinical evaluations. Furthermore, for residents at all levels, the scores reflecting application of data were significantly lower than those assessing data gathering. Conclusions. The gaps between expectations and performance, and between data gathering and application, have important implications for institutional educational philosophy, suggesting a shift toward more clinically oriented and learner-directed strategies in the design of instructional and evaluation methods.

Features of the development of a professional singing sound of pop-jazz performers in the process of teaching performance skills

2021 ◽  
pp. 123-129
Author(s):  
Olesya V. Arzamastseva ◽  
Larisa A. Tyurina
Keyword(s):  
Music Education ◽  
Professional Training ◽  
Sound Production ◽  
Singing Voice ◽  
Modern Music ◽  
Performance Skills ◽  
Effi Ciency ◽  
And Performance ◽  
Jazz Performance ◽  
High Degree

The urgency of vocational training for pop-jazz musicians is substantiated. The aim of the study is to determine the necessary components in the work on professional sound production in the process of teaching pop-jazz vocal, as well as to demonstrate some ways to increase the effi-ciency of work on sound in the classroom. The issues of the development of a professional singing voice in the process of teaching pop-jazz performance are considered. The research methods in-cluded: study of special literature, analysis and generalization of research and pedagogical expe-rience of the work of leading specialists in the field of music education and performance. The high degree of influence of the level of professional training of performers-vocalists on the national musical culture is proved. Practical recommendations for work on singing sound production in the process of professional training of pop-jazz singers in modern music educational institutions are presented.

The Genera of Oysters and the Australian Species

1954 ◽  
Vol 5 (1) ◽  
pp. 132 ◽  
Author(s):  
JM Thomson
Keyword(s):  
Native Species ◽  
Australian Species

Both conchological and malacological characters have been applied to the differentiation of the genera and species. Characters not previously used include the arrangement of tentacles on the mantle folds and the pigmentation on gills, palps, and mantle folds. Three genera are recognized, Ostrea Linnaeus, Crassostrea Sacco, and Pycnodonte Fischer de Waldheim. Ten native species of Australian oyster and one imported species are described in detail. Two keys to the species are provided, one based on shell characters and one based on the details of the soft anatomy.

scholarly journals The reality of Educational accountability and its mechanisms among school leaders in public education schools in Sharourah governorate/ Najran

2019 ◽  
Vol 3 (11) ◽  
Author(s):  
Mohammed Qasim Almqablah
Keyword(s):  
Public Education ◽  
School Leaders ◽  
Point Of View ◽  
School Level ◽  
First Semester ◽  
Female Teachers ◽  
General Average ◽  
And Performance ◽  
High Degree ◽  
Academic Year

The study aimed to identify the reality of practicing accountability among school leaders in public education schools in Sharourah Governorate / Najran and the degree of accountability in the administrative and technical domains. To achieve this goal, the researcher used the analytical survey approach. The study was applied to a sample of )177 ( teachers, including (101) male teachers and (76) female teachers, in the first semester of the academic year 2018- 2019. The results of the study found that, the practice of accountability among the leaders of public education schools in Sharourah governorate / Najran from teachers point of view has got a general average (4.02), high rating, and according to the domains level, practicing accountability in administrative domain has got an average; (3.93), with a high rating, also, practicing accountability in the technical domain has got an average of (3.90) with a high degree. There were no statistically significant differences at the level of (0.05 = α) between the arithmetical averages of the total score for the degree of accountability in administrative and technical domains due to the differences in the variables of the study (years of experience and the scientific qualification). There were statistically significant differences in the degree of accountability in administrative and technical domains due to gender in favor of males; and in the variable of a school level in favor of high school. The study recommended the need to spread the culture of accountability, And to clarify the nature, methods, objectives and mechanisms for teachers, and the need to provide standards and performance indicators used in accountability process.

scholarly journals Organizational culture and its impact on the behavior and performance of employees: الثقافة التنظيمية و أثرها على سلوك و أداء الموظفين

2017 ◽  
Vol 1 (9) ◽  
Author(s):  
Iman Ahmed Bakthir
Keyword(s):  
Organizational Culture ◽  
Team Work ◽  
Working Environment ◽  
Open Door Policy ◽  
Administrative Authority ◽  
Pressure Groups ◽  
Employees Satisfaction ◽  
And Performance ◽  
High Level ◽  
High Degree

The study aimed to identify the type of organizational culture among managers and department heads of United Sugar Company in Jeddah and its impact on the performance of employees. In addition to diagnose the staff and management understanding of the organizational culture role in improving the overall performance of the company. The study sample consisted of (17) managers and (141) employees from all departments within the United Sugar Company. The researcher used the study tool represented by two questioners, one for managers and the other for staff. Answers samples were treated statistically using the statistical analysis software SPSS. Approach that the researcher used was descriptive analytical approach, which describes the nature of the theoretical and field study. The researcher was able to reach managers’ answers results, represented by the diversity of the study sample in terms of organisational rank, qualifications, experience and age. Results indicated the presence of a degree of neutrality in giving managers a mandate administrative authority over employees. It was shown in the study the presence of margin of freedom for employees to express their opinions, however it was not in the required level. The study also shown that the administration involves staff in the development of current and future plans for the company with a high degree, also managers encourage staff to propose alternatives and scientific solutions to problems they face. Awareness demonstrated by staff and managers towards work policies and regulations indicates a good organizational culture. It was found also that managers contribute to modernizing the working environment and identify their needs in modern scientific ways and they encourage team work spirit within employees to create a healthy organizational culture while not afraid of pressure groups since they have a high level of organizational culture. Interest in transferring expertise from outside the company is evidence on the capacity of their organizational culture. The high degree employees’ satisfaction represents the drive to believe in the culture of the organization. The study recommended the need to raise the degree of mangers involving staff in the authorities delegation and the need to adopt open-door policy also for staff to participate in decision-making process. Also it was recommended by the research to direct the attention towards training on the job and make it a gateway to the company's culture. It was urged on the need for transferring a lot of successful experiences to other companies in support of spreading the organization's culture. It was recommended to care about the importance of the development of policies and administrative regulations and make them more flexible to allow for a wide organizational culture. And to follow global corporate developments and investigate the reasons for its success and the role of organizational culture in it and adopt accordingly. It was pointed the need to honor the contributions of outstanding efforts to encourage science and organizational culture. It also recommended holding periodic contests where workers highlight the performance and awareness degree of organizational culture, also holding seminars, lectures and exhibitions inside and outside the company to spread the organizational culture of the company to other parties.

scholarly journals Heterogeneity of the woody flora of swamp forests in southeastern and southern Brazil

Check List ◽  
2014 ◽  
Vol 10 (6) ◽  
pp. 1359 ◽  
Author(s):  
Bruno Coutinho Kurtz ◽  
Elisa Araujo Penna Caris ◽  
Fabio Rubio Scarano
Keyword(s):  
Native Species ◽  
Conservation Management ◽  
Southern Brazil ◽  
Hydromorphic Soils ◽  
Tolerant Species ◽  
The Future ◽  
Great Heterogeneity ◽  
Floristic Patterns ◽  
High Degree

Swamp forests are associated with hydromorphic soils and are naturally fragmented in their distribution. Several local phytosociological surveys on the woody flora of these forests have been conducted in southeastern and southern Brazil. We present here a comprehensive floristic list based on these surveys, including 77 families, 211 genera and 518 native species. The richest families were Myrtaceae (78 species), Fabaceae (47) and Lauraceae (38). The richest genera were Eugenia (24), Myrcia (24), Miconia (21) and Ocotea (20). The woody flora of these swamp forests has great heterogeneity, with most species occurring in one or few sites. Their flora is formed by a few flooding specialist or tolerant species, common in many sites, and many other species that come from the surrounding vegetation. Considering the high degree of deforestation in southeastern and southern Brazil, including swamp forests, the floristic patterns presented here can be useful for the future efforts of conservation, management and restoration of these forests.

Shape of Western Australian dragon lizards (Agamidae)

2005 ◽  
Vol 26 (1) ◽  
pp. 73-85 ◽  
Author(s):  
Philip Withers ◽  
Graham Thompson
Keyword(s):  
Principal Component Analysis ◽  
Body Length ◽  
Size Effects ◽  
Principal Component ◽  
Component Analysis ◽  
Regression Residuals ◽  
Performance Traits ◽  
And Performance ◽  
Western Australian

AbstractFor 41 species of Western Australian agamid lizards, we found that most appendage lengths vary isometrically, so shape is largely independent of size. Of the three methods we used to quantitatively remove the effects of size on shape, the two that use principal component analysis (PCA; Jolicoeur, 1963; Somers, 1986; 1989) provided similar results, whereas regression residuals (against body length) provided a different interpretation. Somers' size-free PCA approach to remove the size-effects was the most useful because it provided 'size-free' scores for each species that were further analysed using other techniques, and its results seemed more biologically meaningful. Some, but not all, of the variation in size-free shape for these lizards could be related to phylogeny, retreat choice and performance traits.

scholarly journals Germination and performance of seven native wildflowers in the Mediterranean landscape plantings

2017 ◽  
pp. 163-171 ◽  
Author(s):  
Enrico Scarici ◽  
Roberto Ruggeri ◽  
Maria Elena Provenzano ◽  
Francesco Rossini
Keyword(s):  
Environmental Sustainability ◽  
Native Species ◽  
Climatic Conditions ◽  
Mediterranean Environment ◽  
Seed Collection ◽  
Marginal Areas ◽  
The Mediterranean ◽  
Pre Treatment ◽  
And Performance ◽  
The Aesthetic

The use of native species in landscape design is a choice related to environmental sustainability and it contributes to the aesthetic appeal of urban and marginal areas. However, to date, the lack of knowledge of the ecological characteristics and agronomic practices of these species, represents a limit for their use. This study aims to obtain information about germination ecology, morphological traits and ornamental value of 7 selected perennial native taxa, with potential use in meadows seed mixtures for the Mediterranean environment. Seed germination for each taxon was assessed under different conditions (temperature, photoperiod and pre-treatment) in a controlled environment, while data on plant performances was collected from field plots. In general, the dormant seeds showed a positive response to pre-treatment with gibberellic acid (GA3) and chilling within a period of about six months from the time of seed collection. The dependence of germination on light and temperature was observed in most of the tested taxa. Differences in plant height and flowering dynamics gave practical directions in terms of combining seeds of different species to create and maintain a wildflower meadow in low-maintenance areas. Crepis bursifolia L. and Hypochaeris radicata L. were the only two species, which showed good persistence during the two-year field study and met the aesthetic requirements of low-input Mediterranean landscaping. Our study by adding original findings to the limited knowledge available on wildflower sowing in the Mediterranean environment, contributes to the development of sustainable strategies in the greening projects designed for those peculiar climatic conditions.

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