L'importance des interactions dans une population de l'araignée Lepthyphantes flavipes (Blackwall) (Araneida: Linyphiidae)

1991 ◽  
Vol 69 (8) ◽  
pp. 2246-2249 ◽  
Author(s):  
Jacques Leclerc ◽  
Patrick Blandin
Keyword(s):  
Field Experiment ◽  
Web Sites ◽  
Web Site ◽  
Field Experiments ◽  
Deciduous Forest ◽  
Interference Competition ◽  
Forest Litter

The significance of interactions between spiders was evaluated in a population of Lepthyphantes flavipes (Blackwall) that occurs on a deciduous forest litter. Three hypotheses are presented: (i) H0, interactions, mainly interference competition for web sites, are not important in structuring the population; (ii) H1, spiders tend to use silk from deserted webs; (iii) H2, dominant spiders tend to displace resident subordinate spiders from their web sites. Because spinning a new web is costly in Lepthyphantes, substantial gain may be obtained when moving to a new web site under hypotheses H1, and H2. These hypotheses were tested in a field experiment by means of plastic rings introduced on litter as web sites. Results confirm hypothesis H0. Hypothesis H1 is not rejected for small-sized spiders and needs to be explored through more field experiments. Hypothesis H2 is rejected.

Eliminating Invisible Barriers: Health Web Site Accessibility

2003 ◽  
Vol 1 (1) ◽  
pp. 70-86
Author(s):  
Christine Rzepka
Keyword(s):  
Health Information ◽  
Web Sites ◽  
Web Site ◽  
People With Disabilities ◽  
High Tech ◽  
Accessibility Issues ◽  
Accessibility Guidelines ◽  
Use Of The Internet ◽  
Simple Evaluation ◽  
The Web

One of the top reasons given for use of the internet is the ability to search for health information. However, much of the planning for web-based health information often fails to consider accessibility issues. If health care organizations and community agencies’ web sites have the latest, most wellresearched information on the health topics of the day, it is useless to those who cannot access it because of invisible technological barriers. Many flashy, high-tech sites were designed only to appeal to the needs of the mainstream population, with no consideration given to how people with disabilities must adapt their use of the web in order to access information. This article addresses issues of access specific to web site development, and will explore barriers to accessibility frequently experienced by web users with disabilities, requirements for ADA compliance, and how people with disabilities use the web. Web site accessibility guidelines, as well as simple evaluation tools, will be discussed. A thorough review of the article will enable even the least tech-savvy of health educators to enhance their skills in planning and evaluating web sites to promote access for people with disabilities.

CONTEMPORARY ASPECTS IN THE SELECTION OF TOOLS AND TECHNOLOGIES FOR DEVELOPING WEB SITES

2018 ◽  
pp. 125-131
Author(s):  
Petar Halachev ◽  
Aleksandra Todeva ◽  
Gergana Georgieva ◽  
Marina Jekova
Keyword(s):  
Programming Languages ◽  
Web Sites ◽  
Web Site ◽  
Work Process ◽  
Design And Development ◽  
Site Development ◽  
Complicated Process ◽  
The Creation ◽  
Guidelines And Recommendations ◽  
Selection Of

he report explores and analyzes the application of the most popular programming languages from different organizations: GitHub; Stackoverflow; the TIOBE's Community index. The main client technologies: HTML; CSS; JavaScript; Typescript are presented and analysed. Features are characterized and the advantages and the disadvantages of the server technologies are described: Java; PHP; Python; Ruby. The application areas for web site development technologies have been defined. The creation of a quality web site is a complex and complicated process, but by observing some guidelines and recommendations in the work process can help to select the tools and the technologies in its design and development.

scholarly journals A Non-Uniform Broadcast Fertilization Method and Its Performance Analysis under Basin Irrigation

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 292
Author(s):  
Kai Zhang ◽  
Meijian Bai ◽  
Yinong Li ◽  
Shaohui Zhang ◽  
Di Xu
Keyword(s):  
Field Experiment ◽  
Field Experiments ◽  
Transport Model ◽  
Inflow Rate ◽  
Application Performance ◽  
Solute Content ◽  
Basin Surface ◽  
Movement Characteristics ◽  
The Difference ◽  
Basin Irrigation

The broadcast fertilization method is widely used under basin irrigation in China. A reasonable broadcast fertilization method can effectively improve application performance of fertilization and reduce pollution from non-point agricultural sources. In this study, firstly, a non-uniform broadcast fertilization method and a non-uniform application coefficient were proposed. The value of non-uniform application coefficient is defined in this paper. It represents the ratio of the difference between the maximum and the average fertilization amount of fertilizer applied on the basin surface to the average fertilization amount of fertilizer applied on the basin surface. Secondly, field experiments were conducted to study the movement characteristics of fertilizer under non-uniform broadcast fertilization for basin irrigation. Field experiment results showed that under the condition of basin irrigation, the non-uniform broadcast fertilization method could weaken the non-uniform distribution of fertilizer due to erosion and transport capacity of solid fertilizer by irrigation water flow, which could significantly improve the uniformity of soil solute content. Thirdly, the solute transport model for broadcast fertilization was corroborated by the field experiment results. The variation rule of fertilization performance with non-uniform application coefficient under different basin length and inflow rate was achieved by simulation. The simulation results showed that fertilization uniformity and fertilization storage efficiency increased first and then decreased with the increase of non-uniform application coefficient. In order to be practically applicable, suitable irrigation programs of non-uniform application coefficient under different basin length and inflow rate conditions were proposed by numerical simulation.

High phosphorus concentrations in seed of wheat and annual medic are related to higher rates of dry matter production of seedlings and plants

1988 ◽  
Vol 28 (6) ◽  
pp. 765 ◽  
Author(s):  
MDA Bolland ◽  
MJ Baker
Keyword(s):  
Triticum Aestivum ◽  
Field Experiment ◽  
Western Australia ◽  
Dry Matter ◽  
Field Experiments ◽  
Medicago Polymorpha ◽  
P Concentration ◽  
Pot Experiments ◽  
Matter Production ◽  
Burr Medic

Seed of 2 cultivars of wheat (Triticum aestivum) and 1 burr medic (Medicago polymorpha) with increasing phosphorus (P) concentrations (wheat 1.4-3.7 g P/kg dry matter, medic 3.3-7.9 g P/kg dry matter) were collected from field experiments with variable levels of applied superphosphate (wheat 0- 577 kg P/ha, medic 0-364 kg P/ha) in south-western Australia. These seeds were used in further experiments to examine the effect of seed P concentration on the subsequent dry matter (DM) production of seedlings and plants in 3 glasshouse pot experiments and 1 field experiment. Seed of the same size (wheat, 35 mg/seed; medic, 3.6 mg/seed) but with increasing P concentration produced substantially higher DM yields in the absence or presence of freshly applied superphosphate P up to 28-35 days after sowing in the pot experiments and 67 days after sowing in the field experiment.

Return to relevance

2015 ◽  
Vol 31 (1) ◽  
pp. 2-6
Author(s):  
Robert Fox
Keyword(s):  
Literature Review ◽  
Web Sites ◽  
Web Site ◽  
Design Methodology ◽  
Library Science ◽  
User Needs ◽  
Content Type ◽  
Web Presence ◽  
Design Philosophy ◽  
Information Professionals

Purpose – In order to continue to respond to patron needs in a relevant way, it is necessary to continuously reevaluate the central message that the library website is intended to convey. It ' s necessary to question assumptions, listen to user needs, and shift our paradigm to make the library web presence as effective as possible. Design/methodology/approach – This is a regular viewpoint column. A basic literature review was done prior to the column being written. Findings – The library Web site remains, in many respects, the “first face” of the library for patrons. To remain relevant, traditional methodologies used in library science may need to be set aside or catered to the needs of the patron. Originality/value – Various methods regarding design philosophy are explored which may be of use to information professionals responsible for the design and content of the library Web sites.

Growth, freezing tolerance, and yield performance of alfalfa (Medicago sativaL.) cultivars grown under controlled and field conditions in northern latitudes

2018 ◽  
Vol 98 (5) ◽  
pp. 1109-1118 ◽  
Author(s):  
Mervi M. Seppänen ◽  
Ville Alitalo ◽  
Hanna K. Bäckström ◽  
Kirsi Mäkiniemi ◽  
Venla Jokela ◽  
...  
Keyword(s):  
Field Experiment ◽  
Cold Acclimation ◽  
Freezing Tolerance ◽  
Field Experiments ◽  
Starch Content ◽  
Day Length ◽  
Forage Legume ◽  
Northern Latitudes ◽  
Medicago Sativa L ◽  
Second Year

Alfalfa (Medicago sativa L.) is one of the most popular forage legume crops worldwide. Its cultivation in the boreal and sub-boreal zone is restricted by inadequate winter hardiness, but global warming may increase its adaptability in these latitudes. Here, we examined variation in growth and freezing tolerance of four alfalfa cultivars recommended for the northern temperate climates of Europe (Alexis, Lavo, Live, and Nexus) and two cultivars with adaptation to milder or Mediterranean climates (Rangelander and Hunter River). Two experiments under controlled conditions (growth cessation and cold acclimation experiments) along with a 2-yr field experiment were conducted. Lavo was the most freezing-tolerant cultivar in both the cold acclimation and field experiments. Both Rangelander and Hunter River showed poor freezing tolerance. Lavo responded to decreasing temperatures, unlike the response to shorter day length, by allocating biomass to the roots. In general, better freezing tolerance was associated with high total nonstructural carbohydrate and low starch content. The field experiment results revealed that the more freezing-tolerant cultivars may have some advantages regarding yield, especially in the second year, but the differences between the cultivars were modest.

Re-examining perceived usefulness and ease of use in online booking

2015 ◽  
Vol 27 (2) ◽  
pp. 185-198 ◽  
Author(s):  
Deniz Kucukusta ◽  
Rob Law ◽  
Alia Besbes ◽  
Patrick Legohérel
Keyword(s):  
Hong Kong ◽  
Technology Acceptance ◽  
Web Sites ◽  
Web Site ◽  
Ease Of Use ◽  
Perceived Usefulness ◽  
The Internet ◽  
Content Type ◽  
Tourism Product ◽  
New Perspective

Purpose – This paper aims to report the findings of an empirical research focusing on Hong Kong online users’ intention to book online tourism products with latest figures. Focusing on the technology acceptance model (TAM), this case study extends the recent research with providing insight regarding the online users’ perceptions of TAM dimensions and how these dimensions are perceived among different demographic groups and Internet usage characteristics with latest figures in Hong Kong, a major tourism destination in Asia with many world-class hotels. Design/methodology/approach – A total of 213 Hong Kong online users were surveyed in March and April 2013 in Hong Kong business districts. Findings – Findings reveal that most respondents who use the Internet for booking online travel products are young, and people above a certain age are not likely to favor booking tourism products online. They are more likely to stick to traditional personal service. Perceived usefulness of the Internet is found more influential than its ease of use in forming a usage intention, and ease of use is perceived more important by jobseekers, student and employees than the other profession groups. In addition, respondents who use the Internet every day and did purchase online tourism product perceived usefulness more important than ease of use. Research limitations/implications – The generalization of this research is limited by its sample size and number of questions. Originality/value – The study gives a new perspective by linking TAM with intention to book online in Hong Kong. The paper would be of interest to the Web site planners or online tourism practitioners to consider Web site usefulness as much as its ease of its use, as both usefulness and ease of use of tourism Web sites are strong predictors of intention to book online.

scholarly journals Ethical Approaches to Robotic Data Gathering in Academic Research

2016 ◽  
Author(s):  
Dan Burk
Keyword(s):  
Web Sites ◽  
Web Site ◽  
Ethical Issues ◽  
Human Subjects ◽  
Academic Research ◽  
Data Gathering ◽  
Data Retrieval ◽  
Technical Data ◽  
Deontological Ethics ◽  
Automated Software

Internet researchers increasingly have at their disposal of an array of automated software agents, or "bots," which can rapidly and efficiently retrieve a variety of economic and technical data from publicly accessible web sites. While these automated tools greatly facilitate the retrieval and analysis of data for academic research, they may pose ethical problems for Internet researchers. Specifically, automated software bots place some load on servers being accessed, possibly in contradiction to the expected use of such servers, and possibly in violation of the legal prerogatives of web site owners. Determining how and when to access such web sites, and whether to seek the consent of web site owners for retrieval of publicly accessible data presents an apparent conflict between general principles of information policy and the emerging legal precedent regarding trespass to computers. This conflict may be characterized as pitting utilitarian considerations against deontological considerations in a fashion reminiscent of previous debates over informed consent in on-line research. In this paper, we examine both utilitarian and deontological characterizations of the ethical obligations of researchers employing automated data retrieval bots, and argue that the contrasts between the two approaches do not necessarily result in conflict. Instead, we argue that the tension within the relevant practices indicates the need for a "meta-choice" between utilitarian and deontological considerations. We further suggest certain factors that may differentiate such a "metaethical" choice in the context of automated data retrieval from the "meta-ethical" choice presented in previously identified contexts of human subjects research or of web browser technology design. In the end, we argue that by analyzing the ethical issues in terms of the contrast between utilitarian and deontological ethics, it is possible to resolve some of the ethical dilemmas regarding automated data retrieval in fruitful and cogent ways.

scholarly journals Criação de um web site para enfermeiros sobre pé diabético

2006 ◽  
Vol 19 (1) ◽  
pp. 56-61 ◽  
Author(s):  
Vera Lúcia Souza Alves ◽  
Isabel Cristina Kowal Olm Cunha ◽  
Heimar F Marin ◽  
Odete de Oliveira
Keyword(s):  
Diabetes Mellitus ◽  
Web Sites ◽  
Web Site

OBJETIVOS: Descrever o processo de criação de um web site educacional para enfermeiros contendo informações sobre avaliação e cuidados preventivos dos pés em pacientes com diabetes mellitus. MÉTODOS: Pesquisa aplicada desenvolvida em 2004, baseada no modelo teórico de Tronchim (1999) para a construção de web sites, composto das fases de conceitualização, desenvolvimento, implementação e avaliação. RESULTADOS: O site possui 68 páginas contendo informações, orientações, fotos e ilustrações, estruturadas em tópicos com os conceitos básicos do diabetes mellitus, pé diabético, neuropatias, doença vascular periférica, infecções, amputações, educação e orientações de enfermagem. Foi avaliado por especialistas que referendaram seu conteúdo e fizeram sugestões para seu aperfeiçoamento. CONCLUSÕES: A criação e desenvolvimento do site foram descritos, podendo ser acessado no <A HREF="http://www.unifesp.br/denf/nien">www.unifesp.br/denf/nien</A> na opção pesquisa.

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