scholarly journals Synthesis of High-Quality Carboxyl End-Functionalized Poly(3-hexylthiophene)/CdSe Nanocomposites

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
He-Ping Shi ◽  
Da-Wei Lin ◽  
Rui-feng Wu

Carboxyl end-functionalized poly(3-hexylthiophene) (P3HT-COOH) was grafted chemically with CdSe nanocrystals (NCs) by a phosphine-free method. The particle quality of P3HT-COOH/CdSe nanocomposites was better than that of P3HT/CdSe nanocomposites, which were synthesized using the same method. Nanocrystals with controllable particle size exhibited a wurtzite crystalline structure and showed excellent nanocrystal dispersion in the P3HT-COOH matrix. Photoluminescence (PL) characterization performed on nanocomposites suggested the efficient charge transfer at the P3HT-COOH/CdSe interface. This approach based on the phosphine-free method is not only environmentally friendly but also highly efficient.

2014 ◽  
Vol 1044-1045 ◽  
pp. 1549-1552 ◽  
Author(s):  
Otakar Cigler ◽  
Karel Kubečka ◽  
Petr Waldstein

The construction and rehabilitation of buildings and structures are intervention in the environment of people. Therefore, we are always looking for new technologies that are not only environmentally friendly but also acceptable from the point of view. Speed, flexibility, minimum limit for residents and transport, and also a high efficiency is the reason why more and more in recent years carried out the rehabilitation of sewerage using remediation sleeves. One of the systems of trenchless rehabilitation of sewerage systems used in Western Europe is a system company RELINEEUROPE Alphaliner Liner GmBH & co., the company's Technicians have developed one of the most important practices in the area of trenchless rehabilitation of sewerage systems. A large proportion of the development also has operators and owners of the pipeline. Technology offers very high quality of carried out restorations. This article describes the procedures for ensuring the quality of the used in Germany, which is a world leader in the development, production and use of this technology.


2015 ◽  
Vol 816 ◽  
pp. 313-320
Author(s):  
Daniela Perdukova ◽  
Mišel Batmend ◽  
Pavol Fedor

Nowadays, machine engraving of photos into solid materials such as marble or granite is becoming very popular. Relatively cheap CNC machines are available. The problem is that high quality photos are essential to obtain good results. The first part of the paper describes a model of a CNC machine used for engraving and puts down the principles of image processing applied to poor quality photos in order to get the best results, as well as the fundamental image processing methods necessary for achieving satisfactory results when using an electromagnetic diamond percussion tool for engraving. The second part of the paper describes a very simple method of data coding and the algorithm of engraving tool movement for image engraving process by means of a control system based on ATmega16 microcontroller. The quality of the engraved images is comparable, or even better, than that of manually engraved images or images engraved by other competitive CNC machines.


Author(s):  
Yuchuan Wang ◽  
Ying Cui ◽  
Bo Wang ◽  
Min Zhang

Skimmed milk powders (SMP) were produced by ultrasonic atomizing-assisted spray drying (UASD). It was found that UASD can produce high quality SMP (with < 5% moisture content and < 2% insolubility) at lower inlet temperatures (~130℃). The particle size of the UASD-SMP was 10 times smaller (decreased from ~20 µm to 4 µm) than the tranditionally spray-dried SMP and the color appeal of UASD-SMP was also better (L* value increased by > 6 %). Overall, this research shown that UASD can be used to produce small particle size and high quality SMP. Keywords: Skimmed milk powder; ultrasonic atomization; spray dryer; particle size distribution; color  


Crowdsourcing ◽  
2019 ◽  
pp. 881-897
Author(s):  
Ajax Persaud ◽  
Steven O'Brien

Organizations make extensive use of websites to communicate with people. Often, visitors to their sites speak many different languages and expect that they will be served in their native language. Translation of web content is a major challenge for many organizations because of high costs and frequent changes in the content. Currently, organizations rely on professional translators or machines to translate their content. The challenge is that professional translations is costly and too slow while machine translations do not produce high quality or accurate translations even though they may be faster and less expensive. Crowdsourcing has emerged as a technique with many applications. The purpose of this research is to test whether crowdsourcing can produce equivalent or better quality translations than professional or machine translators. A crowdsourcing study was undertaken and the results indicate that the quality of crowdsourced translations was equivalent to professional translations and far better than machine translations. The research and managerial implications are discussed.


2014 ◽  
Vol 955-959 ◽  
pp. 3088-3092
Author(s):  
Yu Bo Yang ◽  
Zhong Jun Deng

In order to research the groundwater quality of the Taikang Formation in Tertiary in west of Daqing Oilfield, resistivity logging data of 140 wells in the study area were used to analyze the relations between the groundwater quality and sedimentary sand body and buried depth. The south area of Hongweixing well area and the east of Xishuiyuan well area, including Ranghulu, Qianjincun, Dulitun and Nanshuiyuan well area are favorable for high quality groundwater. The shallower buried water quality is better than the deeper buried water quality of the Taikang Formation in Tertiary. The research provides the evidences to evaluate the groundwater quality in west Daqing Oilfield and determine specific well location, improving the efficiency of exploring the underground drinking water.


2012 ◽  
Vol 550-553 ◽  
pp. 667-670
Author(s):  
Chun Yu Wang ◽  
Jian Qiu Liu ◽  
Peng Guo

Limestone-gypsum desulfurization (LGD) technique is rather popular with the Electric Utility industries in their desulfuration operation. It’s been proved that, Control of PH Value and the concentration of gypsum may prevent scaling. Adoption of rubber or plastic linings based on the medium traits and the types of desulfuration system can prevent corrosion. Simple internal structure, control of pH Value of absorption liquid between 5.6 ~ 5.8, and limestone of the particle size ≤325 meshes particle above 90% may raise the efficiency of absorption tower, and promote its longevity. Control of the concentration of Chloride ion (Cl-) may guarantee a high quality of gypsum products.


2012 ◽  
Vol 4 (2) ◽  
pp. 16
Author(s):  
A Sulaiman

The research of Distillation And Raw Material Composition Effect of Yield And Quality EssentialOil of Leaves And Stem Patchouli (Pogostemon cablin Benth). This study aimed to examine the influence of the length of distillation and composition of raw materials to the yield and quality of essential oil of patchouli leaves and stems to produce essential oils that have a high quality and yield. The time required to obtain the highest yield of patchouli oil is 8 hours, by composition of 100% leaf (1:0), that is equal to 3.631%, while the lowest yield of patchouli oil are produced from 100% stem (1:0) by distillation of 4 hours, in the amount of 0.10%. Composition that produces patchouli oil with the best quality is 100% stems (0:1) but that yield is lower, while the quality of patchouli oil produced by 100% leaf (1:0) and a mixture of leaf-stem (1:1) quality is still lower than the patchouli oil from the stem, but its yield is better than the yield of oil patchouli by 100% composition of the stem (0:1).Keywords:  essential oil, pogostemon cablin benth, yield


2017 ◽  
Vol 35 (8_suppl) ◽  
pp. 48-48
Author(s):  
Holly Mead ◽  
Mandi Pratt-Chapman ◽  
Sean Cleary ◽  
Sarah Raskin

48 Background: With 15.5 million cancer survivors in the U.S., cancer is increasingly viewed as a chronic illness that requires systematic, coordinated care. Yet research has not determined what models of survivorship are most effective in providing high quality, patient-centered care. This study evaluates the quality of three models of cancer survivorship care using a newly developed patient-centered measure. Methods: We conducted a comparative effectiveness study with 32 cancer programs distributed across 3 distinct models of survivorship care: 1) Consultative Specialized Survivorship Clinic; 2) Longitudinal Specialized Survivorship Clinic; and 3) Oncology-Embedded Survivorship Clinic with Referrals. We developed the Patient-Prioritized Measure of High Quality Survivorship Care (PPM), a scale comprising 9 patient-prioritized components of survivorship care. We enrolled 991 survivors of breast, colorectal and prostate cancer across these programs and followed them over 6 months collecting self-reported data on quality of survivorship services. Results: Preliminary results suggest statistically significant differences across models of care for six PPM components. Model 1 is more likely than the other two models to provide a full spectrum of services (p=0.0001), mental health and social support (p<0.0001), and information and resources for patients in survivorship (p=0.0002). Model 2 is better than model 3 at providing a medical home (0.04), and outperforms both other models at coordinating care and transitions (p=0.0059). Both Models 1 and 2 are better than model 3 in ensuring productive patient-provider interactions (p=0.006). Conclusions: It appears that certain models of survivorship care are better at specific domains of patient-centered quality, suggesting cancer centers should consider their organizational context and their patients’ needs before committing to a particular model of care.


2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Xiao-Dan Liu ◽  
Kai Chen ◽  
Song Ma ◽  
Zhong-Hua Hao ◽  
Shan Liang ◽  
...  

AbstractMetal-semiconductor heterostructures integrate multiply functionalities beyond those of their individual counterparts. Great efforts have been devoted to synthesize heterostructures with controlled morphologies for the applications ranging from photocatalysis to photonic nanodevices. Beyond the morphologies, the interface between two counterparts also significantly influences the performance of the heterostructures. Here, we synthesize Au/CdSe Janus nanostructures consisting of two half spheres of Au and CdSe separated by a flat and high-quality interface. Au/CdSe with other morphologies could also be prepared by adjusting the overgrowth conditions. The photocatalytic hydrogen generation of the Au/CdSe Janus nanospheres is measured to be 3.9 times higher than that of the controlled samples with CdSe half-shells overgrown on the Au nanospheres. The highly efficient charge transfer across the interface between Au and CdSe contributes to the improved photocatalytic performance. Our studies may find the applications in the design of heterostructures with highly efficient photocatalytic activity.


2017 ◽  
Vol 13 (1) ◽  
pp. 100-115 ◽  
Author(s):  
Ajax Persaud ◽  
Steven O'Brien

Organizations make extensive use of websites to communicate with people. Often, visitors to their sites speak many different languages and expect that they will be served in their native language. Translation of web content is a major challenge for many organizations because of high costs and frequent changes in the content. Currently, organizations rely on professional translators or machines to translate their content. The challenge is that professional translations is costly and too slow while machine translations do not produce high quality or accurate translations even though they may be faster and less expensive. Crowdsourcing has emerged as a technique with many applications. The purpose of this research is to test whether crowdsourcing can produce equivalent or better quality translations than professional or machine translators. A crowdsourcing study was undertaken and the results indicate that the quality of crowdsourced translations was equivalent to professional translations and far better than machine translations. The research and managerial implications are discussed.


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