Quantitative Analysis of Full Spectrum LEDs for High Quality Lighting

2018 ◽  
Author(s):  
Jay Guoxu Liu ◽  
Wei Tang ◽  
Yonghao Qin ◽  
Guoxi Sun ◽  
Chongyu Shen
Keyword(s):  
Quantitative Analysis ◽  
High Quality ◽  
Full Spectrum

Enhanced Cyan Emission and Optical Tuning of Ca 3 Ga 4 O 9 :Bi 3+ for High‐Quality Full‐Spectrum White Light‐Emitting Diodes

2020 ◽  
Vol 8 (22) ◽  
pp. 2001037 ◽  
Author(s):  
Dongjie Liu ◽  
Xiaohan Yun ◽  
Guogang Li ◽  
Peipei Dang ◽  
Maxim S. Molokeev ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
High Quality ◽  
Full Spectrum ◽  
Light Emitting ◽  
White Light Emitting Diodes

scholarly journals Construct Validity in Software Engineering

2021 ◽  
Author(s):  
Dag Sjøberg ◽  
Gunnar Bergersen
Keyword(s):  
Quantitative Analysis ◽  
Software Engineering ◽  
Construct Validity ◽  
Common Ground ◽  
Conceptual Level ◽  
High Quality ◽  
Operational Level ◽  
Minimalist Approach ◽  
Unbiased Manner ◽  
Statistical Conclusion

Empirical research aims to establish generalizable claims from data. Such claims involve concepts that often must be measured indirectly by using indicators. Construct validity is concerned with whether one can justifiably make claims at the conceptual level that are supported by results at the operational level. We report a quantitative analysis of the awareness of construct validity in the software engineering literature between 2000 and 2019 and a qualitative review of 83 articles about human-centric experiments published in five high-quality journals between 2015 and 2019. Over the two decades, the appearance in the literature of the term construct validity increased sevenfold. Some of the reviewed articles we reviewed employed various ways to ensure that the indicators span the concept in an unbiased manner. We also found articles that reuse formerly validated constructs. However, the articles disagree about how to define construct validity. Several interpret construct validity excessively by including threats to internal, external, or statistical conclusion validity. A few articles also include fundamental challenges of a study, such as cheating and misunderstandings of experiment material. The diversity of topics discussed makes us recommend a minimalist approach to construct validity. We propose seven guidelines to establish a common ground for addressing construct validity in software engineering.

scholarly journals Extragalactic Supergiants

2016 ◽  
Vol 12 (S329) ◽  
pp. 297-304
Author(s):  
Miguel A. Urbaneja ◽  
Rolf P. Kudritzki
Keyword(s):  
Quantitative Analysis ◽  
Chemical Composition ◽  
Optical Spectra ◽  
Host Galaxies ◽  
High Quality ◽  
Distant Galaxies ◽  
Wide Range

AbstractBlue supergiant stars of B and A spectral types are amongst the visually brightest non-transient astronomical objects. Their intrinsic brightness makes it possible to obtain high quality optical spectra of these objects in distant galaxies, enabling the study not only of these stars in different environments, but also to use them as tools to probe their host galaxies. Quantitative analysis of their optical spectra provide tight constraints on their evolution in a wide range of metallicities, as well as on the present-day chemical composition, extinction laws and distances to their host galaxies. We review in this contribution recent results in this field.

scholarly journals XRD-Rietveld Method for Evaluating the Leaching Characteristics of Hardened Cement Paste in Flowing Water

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Lunchao Zhang ◽  
Jikai Zhou ◽  
Xu He ◽  
Chen Chen
Keyword(s):  
Quantitative Analysis ◽  
Cement Paste ◽  
Rietveld Method ◽  
Tap Water ◽  
Relative Content ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Full Spectrum ◽  
Obvious Effect ◽  
Leaching Characteristics

In order to study the leaching characteristics of hardened cement paste by flowing environmental water, indoor simulated leaching tests of Portland cement paste were carried out at different flow velocities with home-made flow field device and tap water as the erosion medium. By means of mechanical properties tests, X-ray diffraction (XRD), and Rietveld full-spectrum quantitative analysis of specimens after leaching at different ages, the change rules of the flexural strength, main phase composition, and mass fraction of the specimens after leaching were obtained. The results show that, within 90 days, the flow rate in the test has no obvious effect on the leaching of hardened cement paste. With the increase in age, the leaching of hardened cement paste gets more obvious. Rietveld full-spectrum quantitative analysis shows that the leaching of hardened cement paste changes with the relative content of CaCO3 and Ca(OH)2. The higher the relative content of CaCO3 is, the better compaction and leaching resistance the paste has. The leaching resistance of hardened cement paste is also related to the gradient of Ca(OH)2. The smaller the gradient is, the better the leaching resistance is. The Rietveld full-spectrum quantitative analysis method can be used as a method to evaluate the leaching effect of hardened cement paste.

Research on Task Allocation Model of Materiel Readiness Rate and the Talented Person Growing Law

2013 ◽  
Vol 401-403 ◽  
pp. 2213-2216
Author(s):  
Bing Chen ◽  
Xiao Dong Zhu ◽  
Yi Gang Wang ◽  
Fei Ye
Keyword(s):  
Quantitative Analysis ◽  
Task Allocation ◽  
Armed Forces ◽  
Allocation Problem ◽  
Equipment Maintenance ◽  
Analysis Method ◽  
High Quality ◽  
Allocation Model ◽  
Quantitative Analysis Method ◽  
System Maintenance

The army's existing preparation system, maintenance task allocation problem is missing quantitative analysis method, Research on Materiel readiness rate and the talented person growing law of task allocation model, This method has guiding significance for the Army equipment maintenance tasks assigned, At the same time which has important effect on improving the combat effectiveness of our armed forces and cultivate high-quality constructive. finally, test the feasibility of the method with examples.

Quantitative Study of Municipal Solid Waste Management in Algeria: A Perspective

2020 ◽  
Vol 46 (3) ◽  
pp. 293-298
Author(s):  
Bendjelloul Amina ◽  
Bennekrouf Mohamed ◽  
Kouloughli Sihem
Keyword(s):  
Developing Countries ◽  
Quantitative Analysis ◽  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Solid Waste Management ◽  
Raw Material ◽  
Municipal Solid Waste Management ◽  
High Quality ◽  
Recycling Industry

MSWM (Municipal Solid Waste Management) is a challenge in developing countries, especially in Algeria. In this paper, a quantitative analysis is proposed, showing that the collection of recyclable items qualified as a high-quality raw material will build a wide profit. The locations of recycling centers in Algeria were determined for the plastic, paper/cardboard, metal, textile and glass. The annual generated amount of each type of recyclable was defined and finally a range of purchase prices was established to estimate the possible price to sell these products. The purpose was to find the most profitable recyclable material to be collected in order to motivate both the informal sector and the recycling industry to collect recyclables. It was observed that plastic is the most profitable recyclable followed by the paper/cardboard, and then textile.

scholarly journals Fish for the city: meta-analysis of archaeological cod remains and the growth of London's northern trade

Antiquity ◽  
2014 ◽  
Vol 88 (340) ◽  
pp. 516-530 ◽  
Author(s):  
David C. Orton ◽  
James Morris ◽  
Alison Locker ◽  
James H. Barrett
Keyword(s):  
Quantitative Analysis ◽  
Food Supply ◽  
Meta Analysis ◽  
Northern Europe ◽  
Black Death ◽  
High Quality ◽  
Changing Patterns ◽  
The Impact ◽  
The City ◽  
Insight Into

The growth of medieval cities in Northern Europe placed new demands on food supply, and led to the import of fish from increasingly distant fishing grounds. Quantitative analysis of cod remains from London provides revealing insight into the changing patterns of supply that can be related to known historical events and circumstances. In particular it identifies a marked increase in imported cod from the thirteenth century AD. That trend continued into the fifteenth and sixteenth centuries, after a short downturn, perhaps attributable to the impact of the Black Death, in the mid fourteenth century. The detailed pattern of fluctuating abundance illustrates the potential of archaeological information that is now available from the high-quality urban excavations conducted in London and similar centres during recent decades.

An On-Line Spectrophotometer for Collection and Manipulation of Absorbance Spectra

1973 ◽  
Vol 27 (4) ◽  
pp. 279-284 ◽  
Author(s):  
Richard J. DeSa ◽  
John E. Wampler
Keyword(s):  
Wave Length ◽  
General Purpose ◽  
Wave Number ◽  
High Quality ◽  
Full Spectrum ◽  
Double Beam ◽  
Data Points ◽  
On Line ◽  
Recording Spectrophotometer ◽  
Factor Data

A uv-visible recording spectrophotometer has been developed which uses an on-line general purpose digital computer and the optical train of a conventional double beam recording spectrophotometer. The computer controls all functions of the instrument and permits the collection and manipulation of high quality absorption spectra without the use of electronic or optical correction devices. Spectra are represented by a series of up to 500 individual data points. Spectra can be manipulated in a variety of ways to meet particular experimental situations and can be displayed or plotted on an arbitrary absorbance scale. A spectrum can be added to, or substracted from, any other spectrum, differentiated, converted to log absorbance, or multiplied by an arbitrary factor. Data can be preserved on paper tape or presented graphically as a high quality labeled plot of variable size on either a wave-length or a wave number scale. The complete system can scan a full spectrum at a maximum rate of 30 nm/sec over any part of a range from 230 to 700 nm. Details of the system are presented with examples of its performance.

The role of the keyworker in breaking down professional culture barriers to providing high-quality palliative care: a literature review

2013 ◽  
Vol 13 (4) ◽  
pp. 465-472 ◽  
Author(s):  
Carina Feuz
Keyword(s):  
Palliative Care ◽  
Disease Management ◽  
Complex Disease ◽  
English Literature ◽  
Interdisciplinary Approach ◽  
Professional Culture ◽  
Adverse Outcomes ◽  
Full Potential ◽  
High Quality ◽  
Full Spectrum

AbstractBackgroundPalliative cancer care is by definition multi-professional in nature. An interdisciplinary approach to disease management emphasising continuity of care results in increased quality of life for patients and families. Complex disease management demands the provision of a full spectrum of high-quality care; requiring both specialist and generalist services. Appointed keyworkers are knowledgeable about patient preferences enabling effective coordination of care and promotes collaborative team-working. The need for diversity in the provision of palliative care is recommended but can challenge effective interdisciplinary collaboration by creating tension and limiting the interdisciplinary team (IDT) from reaching its full potential resulting in adverse outcomes.PurposeThe purpose of this paper is to review the literature available regarding how IDTs and keyworkers influence high-quality palliative care; evaluate how professional culture barriers can influence team collaboration; discuss the keyworker role in minimising these barriers and clinical implications.MethodologyA review of the English literature from 2003 to 2013 was performed using the databases PubMed (NML), OVID Medline and Google Scholar.Results and conclusionKeyworkers can help overcome professional culture barriers that result from ineffective team communication. Facilitating improved communication regarding professional roles fosters mutual understanding among team members. The dissemination of relevant and timely information minimises fragmentation, prompting team decision-making and promotes continuity of high-quality palliative care.

scholarly journals Construct Validity in Software Engineering

2021 ◽  
Author(s):  
Dag Sjøberg ◽  
Gunnar Bergersen
Keyword(s):  
Quantitative Analysis ◽  
Software Engineering ◽  
Construct Validity ◽  
Common Ground ◽  
Conceptual Level ◽  
High Quality ◽  
Operational Level ◽  
Minimalist Approach ◽  
Unbiased Manner ◽  
Statistical Conclusion

Empirical research aims to establish generalizable claims from data. Such claims involve concepts that often must be measured indirectly by using indicators. Construct validity is concerned with whether one can justifiably make claims at the conceptual level that are supported by results at the operational level. We report a quantitative analysis of the awareness of construct validity in the software engineering literature between 2000 and 2019 and a qualitative review of 83 articles about human-centric experiments published in five high-quality journals between 2015 and 2019. Over the two decades, the appearance in the literature of the term construct validity increased sevenfold. Some of the reviewed articles we reviewed employed various ways to ensure that the indicators span the concept in an unbiased manner. We also found articles that reuse formerly validated constructs. However, the articles disagree about how to define construct validity. Several interpret construct validity excessively by including threats to internal, external, or statistical conclusion validity. A few articles also include fundamental challenges of a study, such as cheating and misunderstandings of experiment material. The diversity of topics discussed makes us recommend a minimalist approach to construct validity. We propose seven guidelines to establish a common ground for addressing construct validity in software engineering.

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