Development of an experimental setup and a study for the comparison between optical properties and the subjective perception of a quality of a display surface

2019 ◽  
Author(s):  
Theresa Puder ◽  
Florian Rudek ◽  
Christopher Taudt ◽  
Alexander Kabardiadi-Virkovski ◽  
Peter Hartmann
Keyword(s):  
Optical Properties ◽  
Subjective Perception ◽  
Experimental Setup ◽  
Display Surface

Fluorescent Nanotechnology: An Evolution in Optical Sensors

2020 ◽  
Vol 17 ◽  
Author(s):  
Dilawar Hassan ◽  
Hadi Bakhsh ◽  
Asif M. Khurram ◽  
Shakeel A. Bhutto ◽  
Nida S. Jalbani ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Sensors ◽  
Light Emission ◽  
Environmental Contaminants ◽  
Fluorescent Nanoparticles ◽  
Sensing Applications ◽  
Properties Of Materials ◽  
Optical Properties Of Materials ◽  
Fluorescent Nanomaterials

Background: The optical properties of nanomaterials have evolved enormously with the introduction of nanotechnology. The property of materials to absorb and/or emit specific wavelength has turned them into one of the most favourite candidates to be effectively utilized in different sensing applications e.g organic light emission diodes (OLEDs) sensors, gas sensors, biosensors and fluorescent sensors. These materials have been reported as a sensor in the field of tissue and cell imaging, cancer detection and detection of environmental contaminants etc. Fluorescent nanomaterials are heling in rapid and timely detection of various contaminants that greatly impact the quality of life and food, that is exposed to these contaminants. Later, all the contaminants have been investigated to be most perilous entities that momentously affect the life span of the animals and humans who use those foods which have been contaminated. Objective: In this review, we will discuss about various methods and approaches to synthesize the fluorescent nanoparticles and quantum dots (QDs) and their applications in various fields. The application will include the detection of various environmental contaminants and bio-medical applications. We will discuss the possible mode of action of the nanoparticles when used as sensor for the environmental contaminants as well as the surface modification of some fluorescent nanomaterials with anti-body and enzyme for specific detection in animal kingdom. We will also describe some RAMAN based sensors as well as some optical sensing-based nanosensors. Conclusion: Nanotechnology has enabled to play with the size, shape and morphology of materials in the nanoscale. The physical, chemical and optical properties of materials change dramatically when they are reduced to nanoscale. The optical properties can become choosy in terms of emission or absorption of wavelength in the size range and can result in production of very sensitive optical sensor. The results show that the use of fluorescent nanomaterials for the sensing purposes are helping a great deal in the sensing field.

scholarly journals Tap Water Quality: Seasonal User Surveys in Poland

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3841
Author(s):  
Józef Ober ◽  
Janusz Karwot
Keyword(s):  
Water Quality ◽  
World Literature ◽  
Mixed Methods Research ◽  
Tap Water ◽  
Quality Parameters ◽  
Subjective Perception ◽  
Quality Of Water ◽  
Profit Analysis ◽  
Tap Water Quality

Security of supply of water, which meets the quality parameters specified in applicable standards, is now the basis for the functioning of most societies. In addition to climatic, biological, chemical, and physical hazards, it is worth paying attention to consumers’ subjective perception of the quality of tap water supplied in the area of Poland. The article discusses various activities related to water resources management and analyses the results of an evaluation of selected quality parameters of tap water in Poland. A novelty on a European scale here is an examination of the evaluation of these parameters based on potential seasonal differences (spring, summer, autumn, winter). For the first time in the world literature, PROFIT analysis was used to evaluate selected parameters of tap water quality. The aim of the article was to present a model for the evaluation of the parameters of tap water supplied in different seasons of the year in Poland. Due to the complexity of the research aspects, a mixed-methods research procedure was used in which a literature review was combined with a survey and statistical analysis. For the purpose of the survey, an original survey questionnaire called “Survey of customer opinions on selected parameters of tap water supplied in Poland” was developed especially for this study. The conducted research confirmed the adopted hypothesis that the results of evaluation of selected tap water parameters vary depending on the period (spring, summer, autumn, winter) in Poland. The model developed by means of PROFIT analysis makes it possible to highlight to water suppliers the specific quality parameters in particular seasons of the year (spring, summer, autumn, winter), which may improve the quality of water supplied in Poland and thus, in the long-term perspective, increase the level of satisfaction of water recipients and confidence in drinking tap water in Poland.

Sound Quality of Aircraft Cabin for VIP and Business Jets

2018 ◽  
Author(s):  
Nurkan Turkdogru Gurun ◽  
Hemang N. Sheth
Keyword(s):  
Prediction Model ◽  
Paired Comparison ◽  
Semantic Differential ◽  
Sound Quality ◽  
Subjective Perception ◽  
Subjective Test ◽  
Aircraft Cabin ◽  
Listening Tests ◽  
Potential Customers

This paper aims to identify the attributes that describe aircraft interior noise, determine most important psychoacoustic models that characterize cabin sounds, and construct a prediction model that can be utilized for VIP and business jets to evaluate subjective perception. In the first part, paired comparison listening tests and free verbalization are conducted with expert subjects who experienced VIP and business aircraft flight. The study generated a list of adjective pairs that describe perception of cabin sounds to be used for semantic differential listening tests. Multi-dimensional scaling is performed on paired comparison data. Results showed that subjects’ decisions can be categorized in loudness and annoyance dimensions which are not necessarily linearly associated. The second part of the study is the development of a sound quality prediction model for aircraft cabin. Semantic differential tests are conducted with potential customers. Objective sound quality metrics are correlated to subjective test responses using principal components regression. This model is found to be most effective explaining pleasantness, comfort, and loudness perception. It is intended to be utilized to modify/redesign noise control treatments and sound signature of an aircraft. All listening tests were conducted inside an aircraft cabin simulator considering the influence of visual content.

The Influence of Social Capital, Parenting, and Environment on Quality of Life among 2-4 Years Old Children

2020 ◽  
Author(s):  
Heni Puji Wahyuningsih ◽  
◽  
Bhisma Murti ◽  
Eny Lestari ◽  
Reviono Reviono ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Social Capital ◽  
Parenting Styles ◽  
Economic Status ◽  
Doctoral Program ◽  
Subjective Perception ◽  
Independent Variables ◽  
Depth Interview ◽  
Good Environment

Background: Quality of life is actually a broader construct that encompasses aspects of life that may not be amenable to healthcare service. The quality of life of children is a subjective perception of satisfaction or happiness on quality of life. The quality of life is influenced by various factors, namely health conditions, socio-economic status, parenting styles, and the environment. According to HL Bloom’s theory, health status is determined by 40 percent of environmental factors, 30 percent of behavioral factors, 20 percent of health services, and 10 percent of genetics or heredity. The purpose of this study was to determine the effect of social capital, parenting, and the environment on the quality of life among children. Subjects and Method: This was a retrospective cohort study. Total of 400 children aged 2-4 years old who reside in the desa layak anak villages and ordinary villages in the region of Sleman regency. The dependent variable was quality of life among children. The independent variables were social capital, parenting, and the environment. Data were obtained from in-depth interview and questionnaire. Data were analyzed using path analysis. Results: The good quality of life of children was affected directly by positive social capital (b = 0.084; SE = 0.049; p = 0.001), good parenting style (b = 0.123; SE = 0.050; p <0.001), and good environment (b = 0.128; SE = 0.048; p <0.001). Conclusion: Social capital, parenting and environment have a direct influence on the quality of life among children. Keywords: quality of life, children, social capital, parenting, environment Correspondence: Heni Puji Wahyuningsih. Doctoral Program of Development Counseling, Universitas Sebelas Maret/ School of Health Polytechnis, Yogyakarta, Indonesia. Email: [email protected] DOI: https://doi.org/10.26911/the7thicph.01.15

Surveying the Ashes: Experience from the 2007 Peloponnese Wildfires Six Months after the Disaster

2011 ◽  
Vol 26 (2) ◽  
pp. 79-89 ◽  
Author(s):  
Vasiliki Papanikolaou ◽  
Gloria R Leon ◽  
John Kyriopoulos ◽  
Jeffrey Levett ◽  
Eleftherios Pallis
Keyword(s):  
Health Status ◽  
Group Living ◽  
Total Sample ◽  
Psychological Status ◽  
Control Group ◽  
Subjective Perception ◽  
The Government ◽  
Perception Of Health ◽  
Positive Effect

AbstractIntroduction: Major disasters disrupt the infrastructure of communities and have lasting psychological, economic, and environmental effects on the affected areas. The psychological status and community effects of the devastating 2007 wildfires on the Peloponnese Peninsula of Greece were assessed six months following the disaster.Methods:Adult inhabitants, 18–65 years of age, living in villages affected by the wildfires were selected randomly and compared with a demographically similar group living in neighboring villages that were unaffected by the fires. Regions were chosen based on the extent of fire damage in that area. There were 409 participants in the fire group, and 391 in the control group. Participants completed a questionnaire that included the SCL-90-R symptom checklist, a subjective perception of health status, and a series of items assessing views about current problems, personal values, and trust in different institutions.Results:The fire group scored significantly higher on psychological distress compared to the control group. Both groups viewed their health status in the previous year as better than at the present time. There were few significant differences between groups in the designation of regional problems, attitudes, and values. In the total sample, 41.6% listed unemployment, and 15.0% listed poverty as the most important problem in their region. The Church was indicated as the most trusted institution by 36.7% of the group and the Government by 13.3%. A total of 30.2% did not have a trusted institution.Conclusions:The hardiness and resilience of the fire-impacted group was evident. However, an improvement in economic conditions is needed to maintain the health and enhance the quality of life of the population living in the Peloponnese region. This improvement likely would have a positive effect on the attitude of trust in government institutions.

GaN On 6H-SiC – Structural And Optical Properties

1994 ◽  
Vol 339 ◽  
Author(s):  
C. Wetzel ◽  
D. Volm ◽  
B. K. Meyer ◽  
K. Pressel ◽  
S. Nilsson ◽  
...  
Keyword(s):  
Optical Properties ◽  
Transition Metal Ions ◽  
Substrate Material ◽  
X Ray Diffraction ◽  
High Quality ◽  
Paramagnetic Resonance ◽  
Lattice Constants ◽  
Donor Acceptor ◽  
Related Donor

ABSTRACTRecent progress in the growth of high quality 6H-SiC single crystals has led to an ideal substrate material for GaN epitaxial films. Nearly matching lattice constants of wurzite GaN to 6H-SiC in the hexagonal plane can reduce strain effects at the interface. We employed the sublimation sandwich method to grow single crystal layers at reasonable growth rates with free carrier concentrations of 2×1017 cm-3. Very sharp x-ray diffraction peaks of the GaN (0002) plane are obtained indicating the high quality of this system (Δ(2θ) < 0.1 degrees). These findings are directly reflected in the optical properties. The photoluminescence is dominated by a single sharp exciton line, impurity related donor acceptor transitions are seen with very weak intensities. However, at lower energies the internal luminescence transitions of the 3d transition metal ions Fe and V are observable. The incorporation of Fe is confirmed by electron paramagnetic resonance.

Modeling the Femtosecond Laser Pulse-Train Ablation of Dielectrics

2005 ◽  
Author(s):  
L. Jiang ◽  
H. L. Tsai
Keyword(s):  
Optical Properties ◽  
Laser Pulse ◽  
Femtosecond Laser ◽  
Pulse Train ◽  
Femtosecond Pulse ◽  
Laser System ◽  
Ablation Depth ◽  
Plasma Model ◽  
Depth Zone

Recently, a new laser micromachining technique using multiple femtosecond pulses with a picosecond-to-nanosecond separation as a train group has demonstrated the ability to increase the ablation quality of dielectrics and semiconductors. However, the mechanisms involved in the technique are not fully understood. This study employs the plasma model recently developed by the authors to analyze the femtosecond pulse-train ablation of dielectrics. It is found that the transient significantly varying optical properties are the important reasons that lead to the advantages of the pulse-train technique. It has demonstrated that there exits a constant ablation-depth zone with respect to fluence, which has also been observed experimentally. By using the pulse-train technology, it is possible to obtain repeatable nanostructures, even when the laser system is subject to some fluctuations in fluences.

scholarly journals A soundscape analysis for selected parks in Bydgoszcz

2018 ◽  
Vol 45 ◽  
pp. 00097
Author(s):  
Małgorzata Sztubecka
Keyword(s):  
Sustainable Development ◽  
Sound Level ◽  
Green Spaces ◽  
Future Generations ◽  
Subjective Perception ◽  
Negative Effects ◽  
City Center ◽  
The City

Areas that are considered human-friendly are green spaces. The existing urban parks are designed to fulfill the role of relaxation, recreation, and entertainment. However, in many cases, these are historic places, which at the time didn't have much of an impact on external factors. Sustainable development issues are related to the quality of life and the usage of the environment and its resources by present and future generations. Noise and noise protection is an issue that is part of sustainable development. The inadequate implementation of the principles of sustainable development and non-inclusion of noise can noticeably lead to negative effects now and in the future. The aim of the paper is to analyze the soundscapes of two Bydgoszcz parks located in the city center. The values of the equivalent sound level for these areas were obtained from the existing Bydgoszcz acoustic plan. Subsequently, the resulting distribution of noise was compared with the results of subjective perception of sounds by visitors. On this basis, conclusions can be drawn regarding the ways of shaping such areas while taking into account the perception of visitors.

Services communautaires et qualité de la vie: une étude d'impact en région éloignée*

1992 ◽  
Vol 37 (8) ◽  
pp. 553-563 ◽  
Author(s):  
Céline Mercier ◽  
Raymond Tempier ◽  
Et Claude Renaud
Keyword(s):  
Quality Of Life ◽  
Support Services ◽  
Satisfaction With Life ◽  
Group Living ◽  
Community Support ◽  
Remote Area ◽  
Subjective Perception ◽  
Community Support Services ◽  
The Impact

This longitudinal study with a matched comparison group was conducted in Abitibi, an area in North-West Quebec. Its goal was to observe the impact of community support services on the quality of life of long term psychiatric patients living in a remote area. A cohort of 47 subjects, living in a small town with a comprehensive network of community support services, was compared with a similar group living in a neighbouring city with only outpatient services. The satisfaction with life domains scale developed by Andrews and Withey and adapted by Baker and Intagliata was used at four times during the study. According to the results, the subjective perception of the quality of life in the two groups is comparable, even though the objective conditions are less favorable for the group participating in the community support program. The highest ratings were given to the place of residence, the neighborhood and its commodities; the lowest ratings were given to their love life and financial situation. One can observe a stability of the measures of quality of life over time and for the two groups. The perceptions of the sample living in a remote area are much more favorable than the ones of a comparable group living in the Montreal area. These results are discussed in a double perspective: the role of community support services in the daily life of people who are having severe and persistant problems of mental health, and the interest of measures of quality of life.

Sign in / Sign up

Export Citation Format

Share Document