The impact of dynamic user workloads on web performance

2015 ◽  
pp. 253-282
Author(s):  
Raúl Peña-Ortiz ◽  
José Antonio Gil ◽  
Julio Sahuquillo ◽  
Ana Pont ◽  
Josep Domènech
Keyword(s):  
Web Performance ◽  
The Impact

scholarly journals Evaluating the impact of transport mechanisms on web performance for effective web access

2019 ◽  
Vol 137 ◽  
pp. 25-34 ◽  
Author(s):  
A.I.C. Mohideen ◽  
M. Rajiullah ◽  
R. Secchi ◽  
G. Fairhurst ◽  
A. Brunstrom ◽  
...  
Keyword(s):  
Transport Mechanisms ◽  
Web Performance ◽  
Web Access ◽  
The Impact

scholarly journals Small behavioral adaptations enable more effective prey capture by producing 3D-structured spider threads

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Caroline C. F. Grannemann ◽  
Marco Meyer ◽  
Marian Reinhardt ◽  
Martín J. Ramírez ◽  
Marie E. Herberstein ◽  
...  
Keyword(s):  
Prey Capture ◽  
Behavioral Differences ◽  
Research Attention ◽  
Fiber Alignment ◽  
Web Performance ◽  
Behavioral Adaptations ◽  
Zigzag Pattern ◽  
Orb Web ◽  
The Impact ◽  
The Web

AbstractSpiders are known for producing specialized fibers. The radial orb-web, for example, contains tough silk used for the web frame and the capture spiral consists of elastic silk, able to stretch when prey impacts the web. In concert, silk proteins and web geometry affects the spider’s ability to capture prey. Both factors have received considerable research attention, but next to no attention has been paid to the influence of fiber processing on web performance. Cribellate spiders produce a complex fiber alignment as their capture threads. With a temporally controlled spinneret movement, they connect different fibers at specific points to each other. One of the most complex capture threads is produced by the southern house spider, Kukulcania hibernalis (Filistatidae). In contrast to the so far characterized linear threads of other cribellate spiders, K. hibernalis spins capture threads in a zigzag pattern due to a slightly altered spinneret movement. The resulting more complex fiber alignment increased the thread’s overall ability to restrain prey, probably by increasing the adhesion area as well as its extensibility. Kukulcania hibernalis' cribellate silk perfectly illustrates the impact of small behavioral differences on the thread assembly and, thus, of silk functionality.

Evaluating an accessible web interface for older adults – the impact of mild cognitive impairment (MCI)

2015 ◽  
Vol 9 (4) ◽  
pp. 219-232 ◽  
Author(s):  
Marten Haesner ◽  
Anika Steinert ◽  
Julie Lorraine O'Sullivan ◽  
Elisabeth Steinhagen-Thiessen
Keyword(s):  
Older Adults ◽  
Cognitive Impairment ◽  
Mild Cognitive Impairment ◽  
Human Interaction ◽  
Cognitive Changes ◽  
Content Type ◽  
Web Performance ◽  
Cognitive Limitations ◽  
Usability Data ◽  
The Impact

Purpose – Cognitive changes occur with age and cognitive limitations can negatively influence computer use. Human-interaction studies show that especially older adults benefit considerably from using web platforms. The purpose of this paper is to measure the possible impact of cognitive impairment in web usability and to analyse the differences between older adults with and without cognitive impairment. Design/methodology/approach – In the presented pilot study, 50 older adults tested a web-based interface on a PC and tablet computer that was designed based on a styleguide for this specific user group. In two sessions participants had to conduct six tasks. In a third session older adults were left unsupervised in the laboratory where they were confronted with unexpected events triggered by a principal investigator. Findings – The performance results differed significantly between the two groups. Older adults with mild cognitive impairment (MCI) needed more time and were more likely to make mistakes when using a web platform. After analysing error data, it became apparent that errors made by older adults with MCI occurred due to a lack of orientation in websites. Originality/value – Little is known about web performance of older adults with cognitive impairment. The authors present valid data of this interesting target group and reveal their specific problems when handling a new online platform. The importance of a flat website hierarchy can be essential in developing senior friendly web pages. The authors also highlight methodological issues and illustrate the importance of qualitative information of the usability data, e.g. the different types of problems or errors.

DO GENDER, AGE AND FREQUENCY OF INTERNET ACCESS MATTER ON THE PERCEIVED IMPORTANCE OF HOTEL WEBSITE FEATURES?

2021 ◽  
Vol 27 (1) ◽  
pp. 167-187
Author(s):  
Imane Ezzaouia ◽  
Jacques Bulchand-Gidumal
Keyword(s):  
Design Methodology ◽  
Internet Access ◽  
Web Performance ◽  
Customer Feedback ◽  
Perceived Importance ◽  
Hotel Websites ◽  
Website Features ◽  
The Impact ◽  
The Given ◽  
Corporate Information

Purpose – This study measures the relative importance of hotel website features based on users’ perceptions and analyses the impact of gender, age, and frequency of Internet access on the given importance of features. Our study includes ten features and three hypotheses. Design/methodology/approach – A research questionnaire was developed and distributed to hotel guests. A total of 406 responses were collected. Statistical analysis included paired t-tests and oneway ANOVA. Findings – Results showed that users prioritized information about products and services, bookings and reservations, an easy-to-use website, and contact information. Privacy, design, and information on the surroundings were also important features. Customer feedback options, corporate information, and links to social media sites were ranked as significantly less important. Moreover, age and frequency of Internet access have a significant impact on the perceived importance of features, while no differences were found with regard to gender. Originality – Many studies have used web performance tools to measure the performance of hotel websites. However, these studies have not provided guests’ preferences and perceived importance of website features. To our knowledge, no previous research has examined the effect of gender, age, and frequency of Internet access on the perceived importance of hotel website features.

Formation of Lunar Craters and Bright Rays as a Result of Meteorite Impacts

1962 ◽  
Vol 14 ◽  
pp. 415-418
Author(s):  
K. P. Stanyukovich ◽  
V. A. Bronshten
Keyword(s):  
Explosive Charge ◽  
The Moon ◽  
Meteorite Impacts ◽  
The Earth ◽  
Lunar Craters ◽  
The Impact

The phenomena accompanying the impact of large meteorites on the surface of the Moon or of the Earth can be examined on the basis of the theory of explosive phenomena if we assume that, instead of an exploding meteorite moving inside the rock, we have an explosive charge (equivalent in energy), situated at a certain distance under the surface.

The Geosciences Applied to Lunar Exploration

1962 ◽  
Vol 14 ◽  
pp. 169-257 ◽  
Author(s):  
J. Green
Keyword(s):  
Lunar Surface ◽  
Probable Mechanism ◽  
Point Of View ◽  
Lunar Exploration ◽  
Geological Model ◽  
Apply Geophysics ◽  
Surface Features ◽  
The Impact

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.

Asteroid and Comet Impact Speeds upon Mars: Significance for Panspermia and the Supply of Organics

1997 ◽  
Vol 161 ◽  
pp. 197-201 ◽  
Author(s):  
Duncan Steel
Keyword(s):  
Probability Distributions ◽  
Regions Of Interest ◽  
Significant Fraction ◽  
Organic Chemicals ◽  
Impact Speed ◽  
The Mean ◽  
The Impact

AbstractWhilst lithopanspermia depends upon massive impacts occurring at a speed above some limit, the intact delivery of organic chemicals or other volatiles to a planet requires the impact speed to be below some other limit such that a significant fraction of that material escapes destruction. Thus the two opposite ends of the impact speed distributions are the regions of interest in the bioastronomical context, whereas much modelling work on impacts delivers, or makes use of, only the mean speed. Here the probability distributions of impact speeds upon Mars are calculated for (i) the orbital distribution of known asteroids; and (ii) the expected distribution of near-parabolic cometary orbits. It is found that cometary impacts are far more likely to eject rocks from Mars (over 99 percent of the cometary impacts are at speeds above 20 km/sec, but at most 5 percent of the asteroidal impacts); paradoxically, the objects impacting at speeds low enough to make organic/volatile survival possible (the asteroids) are those which are depleted in such species.

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