scholarly journals Responses of Landscape Groundcovers to Minimum Irrigation

2001 ◽  
Vol 19 (2) ◽  
pp. 78-84 ◽  
Author(s):  
Dennis R. Pittenger ◽  
David A. Shaw ◽  
Donald R. Hodel ◽  
Douglas B. Holt
Keyword(s):  
Real Time ◽  
Reference Evapotranspiration ◽  
Irrigation Treatment ◽  
Visual Quality ◽  
Hedera Helix ◽  
Applied Water ◽  
Twin Peaks ◽  
Baccharis Pilularis ◽  
Vinca Major

Abstract Four irrigation regimes based on percentages of real-time reference evapotranspiration (ET0) were applied to six widely used species of landscape groundcovers (Baccharis pilularis ‘Twin Peaks’, Drosanthemum hispidum, Vinca major, Gazania rigens v. leucolaena ‘Yellow Cascade’, Potentilla tabernaemontanii, and Hedera helix ‘Needlepoint’) during a 17-month period in Irvine, CA. Irrigation treatments (50%, 40%, 30% and 20% of ET0) were applied when accumulated real-time ET0 × treatment percentage reached 4.0 cm (1.6 in). Although the response to irrigation treatment was species dependent, Baccharis, Drosanthemum, and Hedera maintained at least minimally acceptable visual quality with applied water equal to 20% ET0, while Vinca required a minimum of 30% ET0. Acceptable visual quality of Gazania and Potentilla were not maintained at any treatment. Visual quality of Potentilla was better at ET0 greater than or equal to 30% ET0, but visual quality of Gazania was not improved with more water.

scholarly journals Quality of Experience (QoE)-Aware Fast Coding Unit Size Selection for HEVC Intra-prediction

2019 ◽  
Vol 11 (8) ◽  
pp. 175 ◽  
Author(s):  
Buddhiprabha Erabadda ◽  
Thanuja Mallikarachchi ◽  
Chaminda Hewage ◽  
Anil Fernando
Keyword(s):  
Video Coding ◽  
Real Time ◽  
Quality Of Experience ◽  
Visual Quality ◽  
Intra Prediction ◽  
Support Vector ◽  
Brute Force ◽  
Size Selection ◽  
Coding Unit

The exorbitant increase in the computational complexity of modern video coding standards, such as High Efficiency Video Coding (HEVC), is a compelling challenge for resource-constrained consumer electronic devices. For instance, the brute force evaluation of all possible combinations of available coding modes and quadtree-based coding structure in HEVC to determine the optimum set of coding parameters for a given content demand a substantial amount of computational and energy resources. Thus, the resource requirements for real time operation of HEVC has become a contributing factor towards the Quality of Experience (QoE) of the end users of emerging multimedia and future internet applications. In this context, this paper proposes a content-adaptive Coding Unit (CU) size selection algorithm for HEVC intra-prediction. The proposed algorithm builds content-specific weighted Support Vector Machine (SVM) models in real time during the encoding process, to provide an early estimate of CU size for a given content, avoiding the brute force evaluation of all possible coding mode combinations in HEVC. The experimental results demonstrate an average encoding time reduction of 52.38%, with an average Bjøntegaard Delta Bit Rate (BDBR) increase of 1.19% compared to the HM16.1 reference encoder. Furthermore, the perceptual visual quality assessments conducted through Video Quality Metric (VQM) show minimal visual quality impact on the reconstructed videos of the proposed algorithm compared to state-of-the-art approaches.

scholarly journals MINIMUM IRRIGATION OF LANDSCAPE GROUNDCOVERS.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 570a-570
Author(s):  
D.R. Pittenger ◽  
Donald R. Hodel ◽  
David A. Shaw ◽  
D.B. Holt
Keyword(s):  
Field Study ◽  
Reference Evapotranspiration ◽  
Plant Performance ◽  
Performance Ratings ◽  
Twin Peaks ◽  
Aesthetic Appearance ◽  
General Decline ◽  
Vinca Major ◽  
And Performance

A previous field study had shown that Baccharis pilularis, `Twin Peaks', Drosanthemum hispidum, Vinca major, Gazania hybrid, Potentilla tabernaemontanii and Hedera helix, `Needlepoint', express no loss in relative aesthetic appearance when irrigated for one season at 50% of reference evapotranspiration (ETo), but three species did not perform acceptably at 25% of ETo. In this study these six species were grown in the field for 16 months under treatments of 50%, 40%, 30% and 20% of real-time ETo to more closely determine their minimum irrigation needs. Analysis of seasonal plant performance ratings indicates that for Vinca, Gazania and Potentilla there is no significant increase in relative performance when irrigated at more than 30% of ETo. Baccharis, Drosanthemum and Hedera exhibited no significant improvement in performance when irrigated above 20% of ETo. A general decline in aesthetic appearance and performance was observed during the study in Gazania and Potentilla at all treatments, suggesting that their long-term minimum irrigation need may be more than 50% of ETo.

scholarly journals Aplicación para la inspección espacial, volumétrica y seccional interactiva de la Catedral de Santiago de Compostela

2012 ◽  
Vol 3 (6) ◽  
pp. 78
Author(s):  
Viviana Barneche Naya ◽  
Luis A. Hernández Ibáñez ◽  
Alberto Jaspe Villanueva ◽  
Gustavo Fariña Fernández
Keyword(s):  
Real Time ◽  
Cross Section ◽  
Formal Analysis ◽  
Visual Quality ◽  
Level Of Detail ◽  
Santiago De Compostela ◽  
Geometrical Complexity ◽  
Stylistic Elements ◽  
Design Production

<p>This paper describes the design, production and implementation of an application for the formal analysis of the Cathedral of Santiago de Compostela. The geometrical complexity of the model of this building for the level of detail required, derived from the profusion of stylistic elements present, that constitutes one of its signs of identity leaded to use the progressive refinement radiosity method to generate a model which could be handled in real-time, adding the visual quality of global<br />illumination, to be implemented in an application that allows the user to interactively inspect and cross-section the model.</p>

scholarly journals Influence of Irrigation Scheduling on Groundcover Performance

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 799A-799
Author(s):  
Dennis R. Pittenger ◽  
David A. Shaw ◽  
Donald R. Hodel ◽  
William E. Richie
Keyword(s):  
Soil Moisture Content ◽  
Irrigation Scheduling ◽  
The Other ◽  
Irrigation Season ◽  
Irrigation Frequency ◽  
Hedera Helix ◽  
Baccharis Pilularis ◽  
Vinca Major ◽  
Irrigation Treatments ◽  
Species Performance

The performance of six landscape groundcover species was evaluated when irrigated at 30% of ET0 at irrigation schedules of three times per week, once per week, once every 2 weeks, and once every 4 weeks. Potentilla tabernaemontani could not be sustained under any of the treatments. For the other species (Baccharis pilularis, Drosanthemum hispidum, Vinca major, Osteospermum fruticosum, and Hedera helix) there were no season-long differences in a species' performance or density due to irrigation frequency, but there were significant differences among species across irrigation treatments. Drosanthemum and Osteospermum provided good overall appearance and density consistently through the season. Baccharis maintained acceptable performance most of the irrigation season, while Vinca and Hedera became unacceptable in appearance in mid-season. Soil moisture content differed among species, but was not consistently different between irrigation treatments.

scholarly journals PERFORMANCE OF SIX GROUNDCOVER SPECIES UNDER MINIMUM IRRIGATION

HortScience ◽  
1996 ◽  
Vol 31 (6) ◽  
pp. 917C-917
Author(s):  
Dennis R. Pittenger
Keyword(s):  
Plant Performance ◽  
Performance Ratings ◽  
Irrigation Frequency ◽  
Hedera Helix ◽  
Follow Up Study ◽  
Twin Peaks ◽  
Baccharis Pilularis ◽  
Marked Decline

The performance of six landscape groundcover species was evaluated in a field experiment with irrigation treatments of 50%, 40%, 30%, and 20% of real-time ET0. Analysis of seasonal plant performance ratings indicated that for Baccharis pilularis `Twin Peaks', Drosanthemum hispidum, and Hedera helix `Needle point' there were no season-long increases in plant appearance when irrigated more than 20% ET0. Vinca major, Gazania hybrid, and Potentilla tabernaemontanii exhibited no significant improvement in appearance when irrigated above 30% ET0. A marked decline in performance was apparent in Gazania and Potentilla at all treatments during the study period, however, suggesting that their long-term minimum irrigation needs exceed 50% ET0. In a follow-up study, five of the above species and Osteospermum fruticosum received 30% ET0 at irrigation schedules of three times/week, once/week, once/2 weeks, and once/4 weeks. Potentilla was not sustained in acceptable condition at any treatment, while there were no season-long differences in performance within the other species due to irrigation frequency.

Development and Application of Quality Control System for Highway Subgrade Construction

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Tong Wang
Keyword(s):  
Quality Control ◽  
Real Time ◽  
Detection Method ◽  
System Development ◽  
Effective Control ◽  
Construction Process ◽  
Development Mode ◽  
The Road ◽  
Whole Process

The compaction quality of the subgrade is directly related to the service life of the road. Effective control of the subgrade construction process is the key to ensuring the compaction quality of the subgrade. Therefore, real-time, comprehensive, rapid and accurate prediction of construction compaction quality through informatization detection method is an important guarantee for speeding up construction progress and ensuring subgrade compaction quality. Based on the function of the system, this paper puts forward the principle of system development and the development mode used in system development, and displays the development system in real-time to achieve the whole process control of subgrade construction quality.

CONTROL IN REAL TIME THE DENSITY OF PRODUCT AT VARIOUS STAGES OF THE TECHNOLOGICAL PROCESS OF SUGAR PRODUCTION

2020 ◽  
Author(s):  
S.B. Kudryashev ◽  
◽  
N.S. Assev ◽  
R.D. Belashov ◽  
V.A. Naumenko ◽  
...  
Keyword(s):  
Real Time ◽  
Technological Process ◽  
Sugar Industry ◽  
Sugar Production ◽  
Production Processes ◽  
Quality Of Products

The article is devoted to solving one of the most important problems of the development of the sugar industry in Russia – the modernization of sugar production processes. Today, sugar production is actively being modernized, shifting most of its processes to the path of avomatization and optimization to improve the quality of products. This article describes one of the main ways to obtain information about the concentration of sucrose in syrup in the production of sugar.

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