scholarly journals Fast Image-Based Ambient Occlusion IBAO

2011 ◽  
Vol 10 (4) ◽  
pp. 61-65
Author(s):  
Robert Sajko ◽  
Zeljka Mihajlovic
Keyword(s):  
Real Time ◽  
Sampling Method ◽  
Dynamic Scenes ◽  
Heuristic Function ◽  
Ambient Occlusion ◽  
Improved Performance ◽  
Straightforward Solution ◽  
And Performance ◽  
Screen Space

The quality of computer rendering and perception of realism greatly depend on the shading method used to implement the interaction of light with the surfaces of objects in a scene. Ambient occlusion (AO) enhances the realistic impression of rendered objects and scenes. Properties that make Screen Space Ambient Occlusion (SSAO) interesting for real-time graphics are scene complexity independence, and support for fully dynamic scenes. However, there are also important issues with current approaches: poor texture cache use, introduction of noise, and performance swings. In this paper, a straightforward solution is presented. Instead of a traditional, geometry-based sampling method, a novel, image-based sampling method is developed, coupled with a revised heuristic function for computing occlusion. Proposed algorithm harnessing GPU power improves texture cache use and reduces aliasing artifacts. Two implementations are developed, traditional and novel, and their comparison reveals improved performance and quality of the proposed algorithm.

scholarly journals Stochastic-Depth Ambient Occlusion

2021 ◽  
Vol 4 (1) ◽  
pp. 1-15
Author(s):  
Jop Vermeer ◽  
Leonardo Scandolo ◽  
Elmar Eisemann
Keyword(s):  
Real Time ◽  
High Performance ◽  
Depth Map ◽  
Visual Quality ◽  
Ambient Light ◽  
Missing Information ◽  
Time Performance ◽  
Ambient Occlusion ◽  
Depth Buffer ◽  
Screen Space

Ambient occlusion (AO) is a popular rendering technique that enhances depth perception and realism by darkening locations that are less exposed to ambient light (e.g., corners and creases). In real-time applications, screen-space variants, relying on the depth buffer, are used due to their high performance and good visual quality. However, these only take visible surfaces into account, resulting in inconsistencies, especially during motion. Stochastic-Depth Ambient Occlusion is a novel AO algorithm that accounts for occluded geometry by relying on a stochastic depth map, capturing multiple scene layers per pixel at random. Hereby, we efficiently gather missing information in order to improve upon the accuracy and spatial stability of conventional screen-space approximations, while maintaining real-time performance. Our approach integrates well into existing rendering pipelines and improves the robustness of many different AO techniques, including multi-view solutions.

Quality of experience during psychosocial rehabilitation: A real-time investigation with experience sampling method.

2012 ◽  
Vol 35 (6) ◽  
pp. 447-453 ◽  
Author(s):  
Marta Bassi ◽  
Nicoletta Ferrario ◽  
Gabriella Ba ◽  
Antonella Delle Fave ◽  
Caterina Viganò
Keyword(s):  
Real Time ◽  
Quality Of Experience ◽  
Sampling Method ◽  
Psychosocial Rehabilitation ◽  
Experience Sampling ◽  
Experience Sampling Method

scholarly journals Real Time Meteorological Solar Data Based Modified Solar Aware LEACH

2019 ◽  
Vol 8 (12) ◽  
pp. 3860-3868
Keyword(s):  
Energy Consumption ◽  
Real Time ◽  
Network Performance ◽  
Meteorological Data ◽  
Vital Role ◽  
Wireless Sensor ◽  
Dense Network ◽  
Data Throughput ◽  
Improved Performance ◽  
And Performance

In hostile and non-accessible remote area, energy conservation plays vital role in the performance of Wireless Sensor Network (WSN). Shorter life of battery operated sensors tends to lower lifespan of the WSN which further degrades the dense network performance. In this paper, we propose the modified solar aware LEACH for efficient routing in WSN to maximize the network lifespan. This proposed scheme uses real time solar meteorological data for the implementation of solar aware LEACH (sLEACH), advance solar aware LEACH (AsLEACH), improved solar aware LEACH (IS-LEACH).The proposed algorithm is simulated using MATLAB and performance is evaluated on the basis of data throughput, energy consumption and network lifetime which show improved performance than existing techniques.

scholarly journals Good Governance, Anggaran Berbasis Kinerja, dan Kualitas Anggaran SKPD (Suatu Pengujian Model Struktural)

2018 ◽  
Vol 21 (2) ◽  
pp. 126
Author(s):  
Devie Octariani ◽  
Akram Akram ◽  
Animah Animah
Keyword(s):  
Goal Setting ◽  
Local Governments ◽  
Sampling Method ◽  
Good Governance ◽  
Analytical Techniques ◽  
Partial Least Square ◽  
Least Square ◽  
Setting Theory ◽  
And Performance

The aims of this study are to examine and analyze the influence of implementing good governance and performance based budgeting on the quality of budgets of local government offices (SKPD). This research used analytical techniques that included Partial Least Square (smartPLS) 3.0, while goal setting theory was used in o explaining the phenomenon of budget qualities. The population of the study was all SKPDs in Sumbawa Regency. Meanwhile, 94 respondents, who were selected using purposive sampling method served as respondents. The inclusion of SKPD was conditional on it having been examined for compliance with service quality considerations by Ombudsman in 2015. Data was collected using the questionnaire technique. The results of this study showed that the implementation of good governance and performance based budgeting through district contributes to improvement in budget quality. The implications of this study is that local governments should implement principles of good governance and performance based budgeting they aim to improve the quality of public services they deliver.

Real-Time Expert System Interfaces, Cognitive Processes, and Task Performance: An Empirical Assessment

1993 ◽  
Vol 35 (2) ◽  
pp. 243-261 ◽  
Author(s):  
Leonard Adelman ◽  
Marvin S. Cohen ◽  
Terry A. Bresnick ◽  
James O. Chinnis ◽  
Kathryn B. Laskey
Keyword(s):  
Expert System ◽  
Real Time ◽  
Cognitive Processes ◽  
Cognitive Process ◽  
Rule Generation ◽  
Process Measures ◽  
Unanticipated Consequences ◽  
Improved Performance ◽  
And Performance ◽  
System Interfaces

In this experiment we investigated the effect of different real-time expert system interfaces on operators' cognitive processes and performance. The results supported the principle that a real-time expert system's interface should focus operators' attention on where it is required most. However, following this principle resulted in unanticipated consequences. In particular, it led to inferior performance for less critical, yet important cases requiring operators' attention. For such cases operators performed better with an interface that let them select where they wanted to focus their attention. Having a rule generation capability improved performance with all interfaces but did so less than hypothesized. In all cases performance with different interfaces and a rule generation capability was explained by the effect of the interfaces on cognitive process measures.

scholarly journals PENGARUH KARAKTERISTIK PEKERJAAN DAN KOMITMEN ORGANISASI TERHADAP MOTIVASI SERTA DAMPAKNYA TERHADAP KINERJA PEGAWAI PADA DINAS KELAUTAN DAN PERIKANAN PROVINSI JAMBI.

2017 ◽  
Vol 2 (2) ◽  
pp. 150
Author(s):  
Dessy Jusfartinah ◽  
Tetty Asnawi ◽  
Arna Suryani
Keyword(s):  
Organizational Commitment ◽  
Path Analysis ◽  
Sampling Method ◽  
Work Motivation ◽  
Employee Performance ◽  
Employee Motivation ◽  
Positive Influence ◽  
Analysis Techniques ◽  
Improved Performance ◽  
And Performance

The purpose of this research is to gain an overview of karakeristik of work, organizational commitment, motivation and performance of employees at the Department ofmarine and Fisheries province of Jambi and to know the influence of characteristicsof work and commitment the Organization's response to the employee motivation and performance, as well as to know the influence of motivation on performance. To address the research objectives then requires the author studies the theory related to the variable of research i.e. the theory of characteristics of work, organizational commitment, motivation and performance. In addition the author also searched for relevant earlier research in the form of articles/journals and previous thesis to supportthis research. The population in this research is the Department of Marine and fisheries officer province of Jambi that add up to 57 employees. Due to the number of population in this study less than 100 people then in this research sampling method using the method of census. Analysis techniques using path analysis to see the direct and indirect influence, and was succeeded by testing RSquare and hypothesis testing partially and simultaneous with t-test and F-test of the test path analysis is done, the results Research shows that the characteristics of the work and the commitment of the Organization to have an impact on the motivation and performance of employees. Where on the basis of the results of the test t (partial) and F (Simultaneous) tests showed that the characteristics of the work and the commitment of the Organization had a significant and positive influence towards motivation and performance, so did motivasijuga have influence significant and positive on performance. This explains that the characteristics of the work and commitment of organizations that either have a positive influence in providing and enhancing motivation to work-have implications for improved performance against employees at the Department of marine and Fisheries The Province Of Jambi. This research makes some conclusions based on the results of research of characteristics of work, organizational commitment, motivation and performance of employees at the Department of marine and Fisheries province of Jambi in good enough conditions, characteristics the work and the commitment of the Organization a positive and significant effect against the motivation of working either partially or simultaneously, the characteristics of the job and the Organization's commitment to a positive and significant effect on performance of goodemployees partially or simultaneously, work motivation affects employee performance, and the characteristics of the work and commitment of organizations collectivelythrough motivation can direct and indirect effect against against performance employees at the Department of marine and Fisheries province of Jambi.Keywords: organizational commitment, Job Characteristics, Motivasidan performance.

A Wearable System to Assist Walking of Parkinson´s Disease Patients

2010 ◽  
Vol 49 (01) ◽  
pp. 88-95 ◽  
Author(s):  
M. Plotnik ◽  
D. Roggen ◽  
N. Giladi ◽  
J. M. Hausdorff ◽  
G. Tröster ◽  
...  
Keyword(s):  
Real Time ◽  
Detection System ◽  
Freezing Of Gait ◽  
Advanced Parkinson’S Disease ◽  
The Subject ◽  
And Performance ◽  
Pharmacologic Treatments ◽  
Context Aware System ◽  
Post Hoc

Summary Background: About 50% of the patients with advanced Parkinson’s disease (PD) suffer from freezing of gait (FOG), which is a sudden and transient inability to walk. It often causes falls, interferes with daily activities and significantly impairs quality of life. Because gait deficits in PD patients are often resistant to pharmacologic treatment, effective non-pharmacologic treatments are of special interest. Objectives: The goal of our study is to evaluate the concept of a wearable device that can obtain real-time gait data, processes them and provides asistance based on pre-determined specifications. Methods: We developed a real-time wearable FOG detection system that automatically provides a cueing sound when FOG is detected and which stays until the subject resumes walking. We evaluated our wearable assistive technology in a study with 10 PD patients. Over eight hours of data was recorded and a questionnaire was filled out by each patient. Results: Two hundred and thirty-seven FOG events have been identified by professional physiotherapists in a post-hoc video analysis. The device detected the FOG events online with a sensitivity of 73.1% and a specificity of 81.6% on a 0.5 sec frame-based evaluation. Conclusions: With this study we show that online assistive feedback for PD patients is possible. We present and discuss the patients’ and physiotherapists’ perspectives on wear-abilty and performance of the wearable assistant as well as their gait performance when using the assistant and point out the next research steps. Our results demonstrate the benefit of such a context-aware system and motivate further studies.

scholarly journals Real-Time Communications in Autonomic Networks: System Implementation and Performance Evaluation

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
C. Tselios ◽  
C. Papageorgiou ◽  
K. Birkos ◽  
I. Politis ◽  
T. Dagiuklas
Keyword(s):  
Quality Of Service ◽  
Performance Evaluation ◽  
Real Time ◽  
Video Communication ◽  
Network Characteristics ◽  
Autonomic Networks ◽  
And Performance ◽  
Distributed Networking ◽  
Environment Performance

This paper describes the design and prototype implementation of a communication platform aiming to provide voice and video communication in a distributed networking environment. Performance considerations and network characteristics have also been taken into account in order to provide the set of properties dictated by the sensitive nature and the real-time characteristics of the targeted application scenarios. The proposed system has been evaluated both by experimental means as well as subjective tests taken by an extensive number of users. The results show that the proposed platform operates seamlessly in two hops, while in the four hops scenario, audio and video are delivered with marginal distortion. The conducted survey indicates that the user experience in terms of Quality of Service has obtained higher scores in the scenario with the two hops.

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