Vestibular evaluation in children with otitis media with effusion.

Science.gov (United States)

Kolkaila, E A; Emara, A A; Gabr, T A

2015-04-01

Fifty per cent of children with serous otitis media may have some balance disturbances. To evaluate vestibular function in children with otitis media with effusion. The control group comprised 25 children with bilateral normal hearing and middle-ear function. The study group consisted of 30 children with bilateral otitis media with effusion; these were divided into 2 subgroups according to air-bone gap size. Measures included the Arabic Dizziness Handicap Inventory, an imbalance evaluation sheet for children, vestibular bedside tests for children, and air- and bone-conducted vestibular-evoked myogenic potential testing. Arabic Dizziness Handicap Inventory scores and some vestibular bedside test results were significantly abnormal, with normal video-nystagmography results, in children with otitis media with effusion. Air-conducted vestibular-evoked myogenic potentials were recorded in 73 per cent of children with otitis media with effusion, with significantly delayed latencies. Bone-conducted vestibular-evoked myogenic potentials were successfully detected in 100 per cent of children with otitis media with effusion with similar results to the control group. The Arabic Dizziness Handicap Inventory and vestibular bedside tests are valuable tools for detecting vestibular impairment in children. Bone-conducted vestibular-evoked myogenic potentials are useful for vestibular system evaluation.

Evaluation of blind signal separation methods

NARCIS (Netherlands)

Schobben, D.W.E.; Torkkola, K.; Smaragdis, P.

1999-01-01

Recently many new Blind Signal Separation BSS algorithms have been introduced Authors evaluate the performance of their algorithms in various ways Among these are speech recognition rates plots of separated signals plots of cascaded mixingunmixing impulse responses and signal to noise ratios Clearly

Media Fill Test for validation of autologous leukocytes separation and labelling by (99m)Tc-HmPAO.

Science.gov (United States)

Urbano, Nicoletta; Modoni, Sergio; Schillaci, Orazio

2013-01-01

Manufacturing of sterile products must be carried out in order to minimize risks of microbiological contamination. White blood cells (WBC) labelled with (99m)Tc-exametazime ((99m)Tc-hexamethylpropyleneamine oxime; (99m)Tc-HMPAO) are being successfully applied in the field of infection/inflammation scintigraphy for many years. In our radiopharmacy lab, separation and labelling of autologous leukocytes with (99m)Tc-HMPAO were performed in a laminar flow cabinet not classified and placed in a controlled area, whereas (99m)Tc-HMPAO radiolabelling procedure was carried out in a hot cell with manipulator gloves. This study was conducted to validate this process using a Media Fill simulation test. The study was performed using sterile Tryptic Soy Broth (TSB) in place of active product, reproducing as closely as possible the routine aseptic production process with all the critical steps, as described in the our internal standard operative procedures (SOP). The final vials containing the media of each processed step were then incubated for 14 days and examined for the evidence of microbial growth. No evidence of turbidity was observed in all the steps assayed by the Media Fill. In the separation and labelling of autologous leukocytes with (99m)Tc-HmPAO, Media-Fill test represents a reliable tool to validate the aseptic process. Copyright © 2013 Elsevier Inc. All rights reserved.

Smart surfaces with switchable superoleophilicity and superoleophobicity in aqueous media: Toward controllable oil/water separation

KAUST Repository

Zhang, L.

2012-02-01

Advanced materials with surfaces that have controllable oil wettability when submerged in aqueous media have great potential for various underwater applications. Here we have developed smart surfaces on commonly used materials, including non-woven textiles and polyurethane sponges, which are able to switch between superoleophilicity and superoleophobicity in aqueous media. The smart surfaces are obtained by grafting a block copolymer, comprising blocks of pH-responsive poly(2-vinylpyridine) and oleophilic/hydrophobic polydimethylsiloxane (i.e., P2VP-b-PDMS) on these materials. The P2VP block can alter its wettability and its conformation via protonation and deprotonation in response to the pH of the aqueous media, which provides controllable and switchable access of oil by the PDMS block, resulting in the switchable surface oil wettability in the aqueous media. On the other hand, the high flexibility of the PDMS block facilitates the reversible switching of the surface oil wettability. As a proof of concept, we also demonstrate that materials functionalized with our smart surfaces can be used for highly controllable oil/water separation processes.

Anion exchange separation of the light lanthanoids with nitric acid-methyl alcohol mixed media at elevated temperature

International Nuclear Information System (INIS)

Usuda, S.; Magara, M.

1987-01-01

Anion exchange chromatography with nitric acid-methyl alcohol mixed media at elevated temperature was applied to mutual separation of the light lanthanoids, La, Ce, Pr, Nd and Pm. The individual elements could be effectively separated from each other, main fission products and actinoids with 0.01M HNO 3 -90% CH 3 OH or 0.5M HNO 3 -80% CH 3 OH eluent at 90 deg C. (author) 14 refs.; 3 tables

Evaluating a Passive Social Media Citizensourcing Innovation

OpenAIRE

Loukis , Euripidis; Charalabidis , Yannis; Androutsopoulou , Aggeliki

2015-01-01

Part 4: Application Areas and Evaluation; International audience; Governments initially used social media mainly in order to disseminate information to the public about their activities, services, policies and plans. Then they started using social media also in order to collect from citizens useful information, knowledge, opinions and ideas concerning the problems and needs of modern societies and more recently in order to apply crowdsourcing ideas in the public sector context and promote ‘ci...

Development and evaluation of separation elements

International Nuclear Information System (INIS)

Guimaraes, R.R.R.; Rocha, Z.

1990-01-01

For industrial testing of the uranium enrichment technology by the jet nozzle process, it is being erected in Resende the 'First Cascade' (FC) and it was built the Separation Element Plant (FES). For the development, optimization and quality control of the separation elements produced by FES, it was set up in CDTN a laboratorial infrastructure. As part of it, it was designed, built and assembled the Separation Slit Testing Equipment (ITRS), with several components developed and constructed in CDTN. The tests are being carried out in ITRS with the objective of adjusting the machine tools of FES used in the line production of the separation elements. From the satisfactory results obtained with these tests, FES will start the production of separation tubes to be installed in FC. The objective of this paper is to describe the operation and evaluation tests in ITRS, as well as to present their contribution to the development and quality control of the separation elements produced in FES. (author) [pt

Evaluation of an Australian Alcohol Media Literacy Program.

Science.gov (United States)

Gordon, Chloe S; Howard, Steven J; Jones, Sandra C; Kervin, Lisa K

2016-11-01

A 10-lesson alcohol media literacy program was developed, underpinned by the message interpretation processing model, inoculation theory, and constructivist learning theory, and was tailored to be culturally relevant to the Australian context. This program aimed to increase students' media deconstruction skills and reduce intent to drink alcohol. The purpose of this study was to evaluate the effectiveness of the program in achieving these goals through a short-term quasi-experimental trial. Elementary schools were assigned to either the intervention group (83 students) or a wait-list control group (82 students). Student questionnaires were administered at three time points (baseline, after the intervention group completed the program, and after the wait-list control group completed the program) to evaluate the effectiveness of the intervention. The intervention and wait-list control groups reported significantly higher media deconstruction skills as a result of the intervention. Both groups reported significantly lower social norms, whereas the wait-list control group reported significantly lower positive alcohol expectancies. There were no significant changes to self-efficacy to refuse alcohol, preference for alcohol-branded merchandise, and understanding of persuasive intent as a result of the intervention. To date, the majority of alcohol media literacy studies have been conducted in the United States and have focused on deconstructing television and print-based ads. This evaluation provides evidence that an alcohol media literacy program that was developed for a specific cultural context, and that incorporates a broad range of multimodal advertisements, can have a positive impact on beliefs and attitudes that are known predictors/precursors of drinking behaviors.

Study of electrochemical processes for separation of the actinides and lanthanides in molten fluoride media

International Nuclear Information System (INIS)

Zvejskova, R.; Chuchvalcova Bimova, K.; Lisy, F.; Soucek, P.

2005-01-01

The technology of the Molten Salt Reactors (MSR) is developed for two possible applications: For one thing as the Molten Salt Transmutation Reactor (MSTR) incinerating plutonium and minor actinides within reprocessing of spent fuel from PWR or FBR and for another thing as electricity generating MSR working under thorium uranium fuel cycle. Electrochemical separation processes are one of promising pyrochemical techniques that should enable the on-line reprocessing of circulating fuel salt in MSR (fuel cycle back-end). The former application represents the Czech P and T concept, in which framework the electrolytic separation can be applied both in the front-end and back-end of the MSTR fuel cycle. Within the front-end electro separation should follow the Fluoride Volatility Method (FVM), which should separate 95 % of uranium from the spent fuel in the form of volatile uranium hexafluoride. The residual uranium and fission products (FP) are supposed to be separated among others also by electrochemical methods. The presented work comprises the results reached within development of electrochemical separation of the actinides and fission products from each other by electrolytic deposition method on solid cathode in molten fluoride media, that represent he carrier salts of MSR technology. The knowledge of electrochemical properties (red-ox potentials, mainly of deposition potentials) is necessary for determination of separation possibilities of individual components by electrolysis. (authors)

Rapid ion-exchange separations of actinides

International Nuclear Information System (INIS)

Usuda, Shigekazu

1988-01-01

For the purpose of studying short-lived actinide nuclides, three methods for rapid ion exchange separation of actinide elements with mineral acid-alcohol mixed media were developed: anion exchange with nitric acid-methyl alcohol mixed media to separate the transplutonium and rare earth elements from target material, U or Pu and Al catcher foils; anion exchange with hydrochloric acid-methyl alcohol media to separate Am+Cm, Bk and Cf+Fm from the target, catcher foils and major fission products; and cation exchange with hydrochloric acid-methyl alcohol media and with concentrated hydrochloric acid to separate the transplutonium elements as a group from the rare earths after eliminating the large amounts of U, Al, Cu, Fe etc. The methods enable one to perform rapid and effective separation at elevated temperature (90 deg C) and immediate source preparation for alpha-ray spectrometry. (author) 47 refs.; 10 figs

Chemical exchange equilibria in isotope separation. Part I : Evaluation of separation factors

International Nuclear Information System (INIS)

Dave, S.M.

1980-01-01

The theory of chemical exchange equilibria as applied to the isotope separation processes and the isotope effects on equilibrium constants of different exchange reactions has come a long way since its inception by Urey and Rittenberg. An attempt has been made to bring relevant information together and present a unified approach to isotopic chemical exchange equilibrium constant evaluation and its implications to separation processes. (auth.)

EVALUATION OF ALTERNATIVE FILTER MEDIA FOR THE ROTARY MICROFILTER

Energy Technology Data Exchange (ETDEWEB)

Poirier, M.; Herman, D.; Bhave, R.

2011-09-13

higher flux than the Mott filter media in bench-scale and pilot-scale testing. The Accusep and Graver filter media were not evaluated in that testing, because they are not available as flat sheets. The Accusep filter was developed at ORNL and licensed to Pall Corporation. This filter has a stainless steel support structure with a zirconium oxide ceramic membrane. The pore size is 0.1 {micro}m absolute. The Graver filter has a stainless steel support structure with a titanium dioxide ceramic membrane. The pore size is 0.07 {micro}m absolute. SRNL and ORNL are working together to develop filter media similar to the Accusep and Graver media, and to test them in a bench-scale filtration apparatus to attempt to improve the throughput of the rotary microfilter. This report describes the effort.

A social media self-evaluation checklist for medical practitioners.

Science.gov (United States)

Visser, Benjamin J; Huiskes, Florian; Korevaar, Daniel A

2012-01-01

Increasing numbers of medical practitioners and medical students are using online social and business-related networking websites such as Facebook, Doc2doc and LinkedIn. These rapidly evolving and growing social media have potential to promote public health by providing powerful instruments for communication and education. However, evidence is emerging from studies, legal cases, and media reports that the use of these new technologies is creating several ethical problems for medical practitioners as well as medical students. Improper online activities may harm not only individual reputations and careers, but also the medical profession as a whole, for example by breach of patient confidentiality, defamation of colleagues and employers, undisclosed conflict of interests that bias the medical practitioner's medical advice, posting of advice/information without an evidence base, and infringement of copyright. We developed a self-evaluation checklist for medical practitioners using social media. The checklist addresses three key elements in the use of social media: personal information and accessibility, connections, and postings. It contains questions specifically formulated to evaluate a medical practitioner's social media profile, to prevent unintended, improper online activities and to promote professional online behaviour.

Use of social media in health promotion: purposes, key performance indicators, and evaluation metrics.

Science.gov (United States)

Neiger, Brad L; Thackeray, Rosemary; Van Wagenen, Sarah A; Hanson, Carl L; West, Joshua H; Barnes, Michael D; Fagen, Michael C

2012-03-01

Despite the expanding use of social media, little has been published about its appropriate role in health promotion, and even less has been written about evaluation. The purpose of this article is threefold: (a) outline purposes for social media in health promotion, (b) identify potential key performance indicators associated with these purposes, and (c) propose evaluation metrics for social media related to the key performance indicators. Process evaluation is presented in this article as an overarching evaluation strategy for social media.

Credit risk evaluation based on social media.

Science.gov (United States)

Yang, Yang; Gu, Jing; Zhou, Zongfang

2016-07-01

Social media has been playing an increasingly important role in the sharing of individuals' opinions on many financial issues, including credit risk in investment decisions. This paper analyzes whether these opinions, which are transmitted through social media, can accurately predict enterprises' future credit risk. We consider financial statements oriented evaluation results based on logit and probit approaches as the benchmarks. We then conduct textual analysis to retrieve both posts and their corresponding commentaries published on two of the most popular social media platforms for financial investors in China. Professional advice from financial analysts is also investigated in this paper. We surprisingly find that the opinions extracted from both posts and commentaries surpass opinions of analysts in terms of credit risk prediction. Copyright © 2015 Elsevier Inc. All rights reserved.

Application of radiation grafted media for lectin affinity separation and urease immobilization: a novel approach to tumor therapy and renal disease diagnosis

International Nuclear Information System (INIS)

Mueller-Schulte, D.; Daschek, W.

1995-01-01

Carriers modified by synergistic radiation grafting are used as affinity media for the separation of a lectin from a mistletoe extract. The grafted supports show distinctly superior properties when compared to conventional affinity media. The application of these carriers as urease immobilization support incorporated in a conductimetric bioreactor for urea analysis as potential diagnostic device in renal diseases is also described. (Author)

Media exposure and health in Europe: Mediators and moderators of media systems

NARCIS (Netherlands)

Blom, N.; Zanden, R. van der; Buijzen, M.A.; Scheepers, P.L.H.

2016-01-01

This study examined media exposure as an explanatory factor for individual and cross-national differences in self-assessed general health. In studying media exposure, traditional media (television, radio, and newspapers) and contemporary media (internet) were separately considered. Aside from

Radiologic and histopathologic evaluation of various contrast media for bronchography

International Nuclear Information System (INIS)

Kang, Eun Young; Hong, Ki Taek; Kim, Jin Hyung; Kim, Hyung Rae; Shin, Bong Kyung; Oh, Yu Whan; Kim, Han Kyeom; Park, Cheol Min; Seol, Hae Young; Cha, In Ho

1999-01-01

To determine which contrast media are both efficient and safe for the imaging of airways. We evaluated five contrast media (barium, gastrografin, iotrolan, ioxaglate, iopentol) in terms of image quality and their effects on the lungs of 25 white rabbits. For bronchography 0.5ml of contrast media was used. In each contrast group, HRCT scans were obtained immediately (n=5), 12 hours (n=4), 1 day (n=3), 2 days (n=2), and 1 week (n=1) after bronchography. Histopathologic specimens were obtained immediately, 12 hours, 1 day, 2 days, and 1 week later. Bronchograms were evaluated for image quality by three radiologists working independently, and were scored as 1(poor), 2(moderate), or 3(good) in terms of contrast quality and bronchial coating. HRCT was evaluated by two radiologists who reached a concensus;they determined the presence of contrast media, and then the pattern and extent of pulmonary opacity, and any related changes. Histopatholgic specimens were evaluated by two pathologists who sought consensus as to the extent of inflammation, pulmonary edema, and hemorrhage, and any changes in these aspects. Bronchography indicated that the sum of scores for contrast quality was 45 for barium, 33 for gastrografin, 28 for iotrolan, 30 for ioxaglate, and 28 for iopentol, while for each of these media, the sum of scores for bronchial coating was 39, 19, 25, 23, and 21, respectively. Barium showed the best image quality. In all rabbits, HRCT demonstrated the variable extent of ground-glass attenuation and/or consolidation. Lesions were most extensive at 1-2days and then regressed at 1 week;these HRCT findings correlated well with histologic findings. In histologic studies of all five contrast media groups, variable severe inflammatory reactions were observed, with or without necrosis, congesion, edema, and hemorrhage. It was noted that ioxaglate appeared to cause least tissue reaction. The imaging results of this experimental study indicate that for bronchography, barium is

Untargeted LC-MS/MS Profiling of Cell Culture Media Formulations for Evaluation of High Temperature Short Time Treatment Effects.

Science.gov (United States)

Floris, Patrick; McGillicuddy, Nicola; Albrecht, Simone; Morrissey, Brian; Kaisermayer, Christian; Lindeberg, Anna; Bones, Jonathan

2017-09-19

An untargeted LC-MS/MS platform was implemented for monitoring variations in CHO cell culture media upon exposure to high temperature short time (HTST) treatment, a commonly used viral clearance upstream strategy. Chemically defined (CD) and hydrolysate-supplemented media formulations were not visibly altered by the treatment. The absence of solute precipitation effects during media treatment and very modest shifts in pH values observed indicated sufficient compatibility of the formulations evaluated with the HTST-processing conditions. Unsupervised chemometric analysis of LC-MS/MS data, however, revealed clear separation of HTST-treated samples from untreated counterparts as observed from analysis of principal components and hierarchical clustering sample grouping. An increased presence of Maillard products in HTST-treated formulations contributed to the observed differences which included organic acids, observed particularly in chemically defined formulations, and furans, pyridines, pyrazines, and pyrrolidines which were determined in hydrolysate-supplemented formulations. The presence of Maillard products in media did not affect cell culture performance with similar growth and viability profiles observed for CHO-K1 and CHO-DP12 cells when cultured using both HTST-treated and untreated media formulations.

Study of the separation of metallic compounds by means of an anion exchanger resin and of complexing media

International Nuclear Information System (INIS)

Denis de Trobriand, Anne

1971-01-01

In order to define better separation conditions of molybdenum and aluminium from uranium alloys, this research thesis first reports the study of the fixation of each of these elements on a Dowex resin in a carbonate medium. Results obtained by other studies in a hydrogen carbonate medium has leaded to the use of mixing of CO 3 2- and HCO 3 - . In a last part, the author reports the analysis of two samples (uranium-molybdenum and uranium-aluminium): after an attack of these alloys in a melt carbonate medium, components are separated by elution in one of the studied media

75 FR 77670 - SuperMedia, LLC, Formerly Known as Idearc Media, LLC, a Subsidiary of SuperMedia Information...

Science.gov (United States)

2010-12-13

... Known as Idearc Media, LLC, a Subsidiary of SuperMedia Information Services, LLC Publishing Group, Troy... Subsidiary of SuperMedia Information Services, LLC, Troy, New York, to apply for Trade Adjustment Assistance..., Publishing Group, Troy, New York, who became totally or partially separated from employment on or after...

The social strategy cone: Towards a framework for evaluating social media strategies

NARCIS (Netherlands)

Effing, Robin; Spil, Antonius A.M.

2016-01-01

Social media is growing rapidly. Providing both risks and opportunities for organizations as it does. The social strategy cone is developed for evaluating social media strategies. This framework comprises of seven key elements of social media strategies as based on a systematic literature review and

Review and assessment of technologies for the separation of cesium from acidic media

Energy Technology Data Exchange (ETDEWEB)

Orth, R.J.; Brooks, K.P.; Kurath, D.E.

1994-09-01

A preliminary literature survey has been conducted to identify and evaluate methods for the separation of cesium from acidic waste. The most promising solvent extraction, precipitation, and ion exchange methods, along with some of the attributes for each method, are listed. The main criteria used in evaluating the separation methods were as follows: (1) good potential for cesium separation must be demonstrated (i.e., cesium decontamination factors on the order of 50 to 100). (2) Good selectivity for cesium over bulk components must be demonstrated. (3) The method must show promise for evolving into a practical and fairly simple process. (4) The process should be safe to operate. (5) The method must be robust (i.e., capable of separating cesium from various acidic waste types). (6) Secondary waste generation must be minimized. (7) The method must show resistance to radiation damage. The most promising separation methods did not necessarily satisfy all of the above criteria, thus key areas requiring further development are suggested for each method. The report discusses in detail these and other areas requiring further development, as well as alternative solvent extraction, precipitation, ion exchange, and {open_quote}other{close_quote} technologies that, based on current information, show less promise for the separation of cesium from acidic wastes because of significant process limitations. When appropriate, the report recommends areas of future development.

Separation of milk fat globules via microfiltration: Effect of diafiltration media and opportunities for stream valorization.

Science.gov (United States)

Jukkola, A; Partanen, R; Rojas, O J; Heino, A

2016-11-01

Milk fat globule membranes (MFGM) sourced in buttermilk have gained recent interest given their nutritional value and functional properties. However, production of isolated MFGM has been challenging given their size similarity with casein micelles, which limits attempts toward fractionation by size exclusion techniques. Therefore, the hypothesis underpinning this study is that the removal of proteins from cream before butter-making facilitates MFGM isolation. As such, milk fat globules were separated from raw whole milk via microfiltration (1.4-µm pore diameter and 0.005-m 2 filtration surface area) by using 3 diafiltration media; namely, skim milk ultrafiltration permeate, saline, and water. Their effects on the stability of the milk fat globules and protein permeation was elucidated. Whereas a substantial reduction in protein concentration was achieved with all diafiltration media (~90% reduction), water and saline produced negligible membrane fouling with better filtration performance. Moreover, diafiltration with skim milk ultrafiltration permeate exhibited reduced permeate flux. Colloidal stability of the resultant milk decreased with all diafiltration solutions due to changing composition and reduced apparent viscosity. Overall, microfiltration was found to be an efficient method for separation of milk fat globules from whole milk, leading to increased MFGM fragment concentration in buttermilk dry matter, thus making it more suitable for industrial utilization. Copyright © 2016 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.

Evaluation and Modification of Processes for Bioethanol Separation and Production

Directory of Open Access Journals (Sweden)

Johnner P Sitompul

2012-04-01

Full Text Available This paper concerns on process evaluation and modification for bioethanol separation and production by applying pinch technology. Further, the paper is also focused on obtaining a most energy-efficient process among several processes. Three basic process configurations of bioethanol separation and production were selected for this study. The three separations and production systems are Othmer process, Barbet process and a separation process that operates under vacuum condition. Basically, each process is combination of Danish Distilleries process with a separation system yielding 95% (v/v bioethanol. The production capacity of the plant is estimated about 4 x 107 litre of bioethanol 95% (v/v per year. The result of the studies shows that the most energy efficient process among the three processes evaluated is the Othmer process, followed by the Barbet process and the process involving vacuum operation. The evaluation also shows that further energy saving can be carried for Barbet and Othmer process configuration when Tmin = 10oC for heat exchange possible.

Ionic Liquids as Extraction Media for Metal Ions

Science.gov (United States)

Hirayama, Naoki

In solvent extraction separation of metal ions, recently, many researchers have investigated possible use of hydrophobic ionic liquids as extraction media instead of organic solvents. Ionic liquids are salts of liquid state around room temperature and can act not only as solvents but also as ion-exchangers. Therefore, the extraction mechanism of metal ions into ionic liquids is complicated. This review presents current overview and perspective on evaluation of nature of hydrophobic ionic liquids as extraction media for metal ions.

Consumer Trust in and Emotional Response to Advertisements on Social Media and their Influence on Brand Evaluation

Directory of Open Access Journals (Sweden)

Ivanete Schneider Hahn

2016-01-01

Full Text Available Social media is becoming an important part of an organization's media strategy. This study examines the effects of trust and consumer emotional response to advertisements on brand evaluation in an online social media context. The study used a survey method, and the studied population consisted of 927 Brazilian social media users (Facebook subscribers. The results showed the following: (1 the emotional response to advertising on social media had a positive influence on brand evaluation; and (2 consumer trust had a positive influence on brand evaluation and emotional response to advertisements on social media. It is possible to conclude that consumer trust is the key variable to a positive emotional response to advertisements on social media and to a positive brand evaluation. Finally, this study demonstrates that companies must measure the emotional response to advertising in their social media activities as a way of enhancing brand evaluation.

Usefulness of enteral contrast media in MR evaluation of pelvic mass

International Nuclear Information System (INIS)

Kim, Hun; Kim, Jung Sik; Kim, Hong; Shon, Chul Ho; Lee, Hee Jung; Lee, Sung Moon; Woo, Sung Ku; Suh, Soo Jhi

1999-01-01

To assess the value of enteral contrast media for the evaluation of pelvic masses by MR imaging. Between April and July 1998, 16 women with pelvic masses were examined by MRI. The origin of the lesion was the ovary in twelve cases, the uterus in three, and the sigmoid in one. Using a 1.5T scanner(Magnetom Vision, Siemens), T1-weighted axial spin echo(SE), T2-weighted turbo spin echo(TSE), two dimensional fast low-angle shot(FLASH 2D), and half-Fourier TSE(HASTE) images were obtained in all patients after the administration of Magnevist Enteral (Shering, Berlin, Germany). In each MR imagine sequence, distinction between the lesion and adjacent bowel (1, not distinguished; 2, partly distinguished; 3, clearly distinguished), artifact (0, absent; 1, mild; 2, severe), image quality (1, poor; 2, fair; 3, good), were compared before and after the use of enteral contrast media. Changes in MRI impression after the use of enteral contrast media were also evaluated. Two radiologists reached a consensus after reviewing the images. Statistical significance was determined by Wilcoxon's signed ranked test. For distinguishing lesions, SE T1WI and FLASH 2D with enteral contrast media were significantly superior to SE T1WI without enteral contrast media (p < 0.05). With regard to image quality, FLASH 2D and HASTE, both with enteral contrast media, were significantly superior to SE T1WI and TSE T2WI, respectively, both without enteral contrast media (p < 0.05). Artefacts were more frequently found after the application of enteral contrast media in conventional sequences but were not present in breathhold sequences. In two patients, MRI impression changed after the application of enteral contrast media. In a limited number of cases, enteral contrast media improved lesion detection, image quality and diagnostic accuracy when breathhold fast MR imaging was applied

In Vivo Differentiation of Complementary Contrast Media at Dual-Energy CT

Science.gov (United States)

Mongan, John; Rathnayake, Samira; Fu, Yanjun; Wang, Runtang; Jones, Ella F.; Gao, Dong-Wei

2012-01-01

Purpose: To evaluate the feasibility of using a commercially available clinical dual-energy computed tomographic (CT) scanner to differentiate the in vivo enhancement due to two simultaneously administered contrast media with complementary x-ray attenuation ratios. Materials and Methods: Approval from the institutional animal care and use committee was obtained, and National Institutes of Health guidelines for the care and use of laboratory animals were observed. Dual-energy CT was performed in a set of iodine and tungsten solution phantoms and in a rabbit in which iodinated intravenous and bismuth subsalicylate oral contrast media were administered. In addition, a second rabbit was studied after intravenous administration of iodinated and tungsten cluster contrast media. Images were processed to produce virtual monochromatic images that simulated the appearance of conventional single-energy scans, as well as material decomposition images that separate the attenuation due to each contrast medium. Results: Clear separation of each of the contrast media pairs was seen in the phantom and in both in vivo animal models. Separation of bowel lumen from vascular contrast medium allowed visualization of bowel wall enhancement that was obscured by intraluminal bowel contrast medium on conventional CT scans. Separation of two vascular contrast media in different vascular phases enabled acquisition of a perfectly coregistered CT angiogram and venous phase–enhanced CT scan simultaneously in a single examination. Conclusion: Commercially available clinical dual-energy CT scanners can help differentiate the enhancement of selected pairs of complementary contrast media in vivo. © RSNA, 2012 PMID:22778447

Modelling extraction and separation of some alpha-transition elements from acidic media by synergic combinations of aromatic polyimines and micellar cationic exchangers

International Nuclear Information System (INIS)

Vitart, X.; Musikas, C.

1988-01-01

In this paper is emphasized, taking the extraction and separation by Dinonylnaphtalene sulfonic acid (HDMNS)of ruthenium-rhodium from a nitric acid media and nickel-cobalt from a sulfuric acid media as examples, the quantified chemical equilibria involved in order to elucidate the extraction mechanism. Reactions in aqueous media were investigated within three aspects: kinetics of formation, stability of metal complexes, ionic associations between complexes and mineral anions present in acidic media. This last point explains partly the selectivity of the system. The behaviour of HDNNS within extraction conditions, was studied leading to the structure of the micelle and to the quantification of equilibria involved (critical micelle concentration, polymerisation constant, etc...). Ligand extraction was studied previously to metal complexes extraction since the general mechanism of the system proceeds as a competitive extraction of cationic species in aqueous media (protonated forms of the free ligand, cationic metal complexes). The modelling of independent extraction of metals was used to predict numerically the behaviour of a multicomponent system where few metals are initially in aqueous media. These simulations are in accordance with experimental results

Evaluation of phase separator number in hydrodesulfurization (HDS) unit

Science.gov (United States)

Jayanti, A. D.; Indarto, A.

2016-11-01

The removal process of acid gases such as H2S in natural gas processing industry is required in order to meet sales gas specification. Hydrodesulfurization (HDS)is one of the processes in the refinery that is dedicated to reduce sulphur.InHDS unit, phase separator plays important role to remove H2S from hydrocarbons, operated at a certain pressure and temperature. Optimization of the number of separator performed on the system is then evaluated to understand the performance and economics. From the evaluation, it shows that all systems were able to meet the specifications of H2S in the desired product. However, one separator system resulted the highest capital and operational costs. The process of H2S removal with two separator systems showed the best performance in terms of both energy efficiency with the lowest capital and operating cost. The two separator system is then recommended as a reference in the HDS unit to process the removal of H2S from natural gas.

Evaluation of Advertising Campaigns on Social Media Networks

Directory of Open Access Journals (Sweden)

Jurgita Raudeliūnienė

2018-03-01

Full Text Available As the virtual environment is constantly changing, not only users’ informational and knowledge needs but also the means and channels of communication with customers applied by organizations change. There is a noticeable trend to move more and more advertising campaigns to social media networks because of the opportunities they provide to organizations and users, which results in the ever-increasing popularity of social media networks and a number of their users. Such a transition is explained by one of the main objectives organizations have: to inform their customers in an appropriate way and receive feedback on social media networks, which is difficult when traditional advertising channels and means are applied. Since advertising campaigns on social media networks are evolving rapidly, their assessment factors and methods, which receive controversial opinions in both scientific literature and practice, change too. Researchers assess and interpret the factors that influence the effectiveness of advertising campaigns on social media networks differently. Thus, a problem arises: how should we evaluate which approach is more capable of accurately and fully reflecting and conveying reality? In this research, this problem is studied by connecting approaches of different researchers. These approaches are linked to the effectiveness assessment of advertising campaigns on social media network aspects. To achieve the objective of this study, such research methods as analysis of scientific literature, multiple criteria and expert assessment (a structured survey and an interview were applied. During the study, out of 39 primary assessment factors, eight primary factors that influence the effectiveness of advertising campaigns on social media networks were identified: sales, content reach, traffic to website, impressions, frequency, relevance score, leads and audience growth.

Improving the Quality of Mixed Recycled Coarse Aggregates from Construction and Demolition Waste Using Heavy Media Separation with Fe3O4 Suspension

Directory of Open Access Journals (Sweden)

Heonchan Kang

2017-01-01

Full Text Available The primary objectives of this study are to investigate the feasibility of a heavy media separation process with magnetite (Fe3O4 suspension for upgrading the quality of mixed recycled coarse aggregates from construction and demolition waste (CDW in Korea and to determine a range of effective operating density of Fe3O4 suspension for producing high-quality RCA acceptable to structural concrete applications. For the purposes, six 200 kg recycled coarse aggregates (RCAs samples were collected from a conventional recycling plant in Korea. Subsequently, the samples were processed by a heavy media separation process using Fe3O4 suspensions with various densities from 2.65 g/cm3 to 2.40 g/cm3 with an interval of 0.05 g/cm3. Next, a series of tests was performed in the laboratory to evaluate properties of finished sink and float products from the HMS processes, including oven-dry density, absorption capacity, and physical durability. Furthermore, compressive strength of concrete cylinders (150 mm by 300 mm made of the finished sink products from Fe3O4 suspensions with three different densities (2.4, 2.5, and 2.6 g/cm3 was tested in this study. As a result, it was demonstrated that the HMS process using Fe3O4 suspension with a density ranging between 2.40 and 2.65 g/cm3 was effective for upgrading mixed CDW RCAs in Korea to high-quality RCAs acceptable for structural concrete applications.

Infant otitis media and the use of secondary heating sources.

Science.gov (United States)

Pettigrew, Melinda M; Gent, Janneane F; Triche, Elizabeth W; Belanger, Kathleen D; Bracken, Michael B; Leaderer, Brian P

2004-01-01

This prospective study investigated the association of exposure to indoor secondary heating sources with otitis media and recurrent otitis media risk in infants. We enrolled mothers living in nonsmoking households and delivering babies between 1993 and 1996 in 12 Connecticut and Virginia hospitals. Biweekly telephone interviews during the first year of life assessed diagnoses from doctors' office visits and use of secondary home heating sources, air conditioner use, and day care. Otitis media episodes separated by more than 21 days were considered to be unique episodes. Recurrent otitis media was defined as 4 or more episodes of otitis media. Repeated-measures logistic regression modeling evaluated the association of kerosene heater, fireplace, or wood stove use with otitis media episodes while controlling for potential confounders. Logistic regression evaluated the relation of these secondary heating sources with recurrent otitis media. None of the secondary heating sources were associated with otitis media or with recurrent otitis media. Otitis media was associated with day care, the winter heating season, birth in the fall, white race, additional children in the home, and a maternal history of allergies in multivariate models. Recurrent otitis media was associated with day care, birth in the fall, white race, and a maternal history of allergies or asthma. We found no evidence that the intermittent use of secondary home heating sources increases the risk of otitis media or recurrent otitis media. This study confirms earlier findings regarding the importance of day care with respect to otitis media risk.

Consumer Trust in and Emotional Response to Advertisements on Social Media and their Influence on Brand Evaluation

OpenAIRE

Ivanete Schneider Hahn; Flavia Luciane Scherer; Kenny Basso; Marindia Brachak dos Santos

2016-01-01

Social media is becoming an important part of an organization's media strategy. This study examines the effects of trust and consumer emotional response to advertisements on brand evaluation in an online social media context. The study used a survey method, and the studied population consisted of 927 Brazilian social media users (Facebook subscribers). The results showed the following: (1) the emotional response to advertising on social media had a positive influence on brand evaluation; and ...

Filter Media Tests Under Simulated Martian Atmospheric Conditions

Science.gov (United States)

Agui, Juan H.

2016-01-01

Human exploration of Mars will require the optimal utilization of planetary resources. One of its abundant resources is the Martian atmosphere that can be harvested through filtration and chemical processes that purify and separate it into its gaseous and elemental constituents. Effective filtration needs to be part of the suite of resource utilization technologies. A unique testing platform is being used which provides the relevant operational and instrumental capabilities to test articles under the proper simulated Martian conditions. A series of tests were conducted to assess the performance of filter media. Light sheet imaging of the particle flow provided a means of detecting and quantifying particle concentrations to determine capturing efficiencies. The media's efficiency was also evaluated by gravimetric means through a by-layer filter media configuration. These tests will help to establish techniques and methods for measuring capturing efficiency and arrestance of conventional fibrous filter media. This paper will describe initial test results on different filter media.

Evaluation of a school-based violence prevention media literacy curriculum.

Science.gov (United States)

Fingar, Kathryn R; Jolls, Tessa

2014-06-01

Evaluate whether Beyond Blame, a violence prevention media literacy curriculum, is associated with improved knowledge, beliefs and behaviours related to media use and aggression. Using a quasi-experimental design, from 2007 to 2008, teachers from schools across Southern California administered the curriculum with or without training or served as controls. Students were tested before and after the curriculum was implemented, and during the fall semester of the next academic year. Multivariate hierarchical regression was used to compare changes from baseline to follow-up between the intervention and control groups. Compared with controls, at the first post-test, students in the trained and untrained groups reported increased knowledge of five core concepts/key questions of media literacy, increased self-rated exposure to media violence, as well as stronger beliefs that media violence affects viewers and that people can protect themselves by watching less. Regarding behaviours, controls were more likely to report ≥8 h of media consumption at the second post-test than at baseline (OR=2.11; 95% CI 1.13 to 3.97), pushing or shoving another student (OR=2.16; 95% CI 1.16 to 4.02) and threatening to hit or hurt someone (OR=2.32; 95% CI 1.13 to 4.78). In comparison, there was no increase in these behaviours in the trained and untrained groups. This study suggests media literacy can be feasibly integrated into schools as an approach to improving critical analysis of media, media consumption and aggression. Changing the way youth engage media may impact many aspects of health, and an important next step will be to apply this framework to other topics. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

Separation unit for uranium isotopes etc

International Nuclear Information System (INIS)

1975-01-01

The task of the invention - improving the efficiency of a uranium isotope separation unit with a rotor as separation chamber by improving its flow characteristics - is solved by a central-axial gas conduction system with radial branches which leads the media into the separation chambers or out of these. (UWI) [de

‘I’d just lose it if there was any more stress in my life’: Separated Fathers, Fathers’ Rights and the News Media

Directory of Open Access Journals (Sweden)

Vivienne Elizabeth

2016-06-01

Full Text Available Custody abductions and filicides-suicides are not every day occurrences and typically become ‘media events’. Through an analysis of newspaper representations of two custody abductions and one filicide-suicide, this article examines the role played by fathers’ rights discourse in the construction of the separated father in each case. It argues that fathers’ rights discourse played a central role in the sympathetic portrayal of the two fathers involved in the custody abductions, but was less obviously present in the case of the filicide-suicide. These divergent representations indicate that news media representations are contingent on circumstances and also point to the limits of fathers’ rights discourses in legitimating and neutralising the actions of fathers in pain over the loss of intimate personal relationships. However, the use of a forensic approach to reporting meant that each case remained decontextualised from the pattern of violence and coercive control that typically characterises conflictual separations and custody disputes.

Selective separation of hydroxy polychlorinated biphenyls (HO-PCBs) by the structural recognition on the molecularly imprinted polymers: Direct separation of the thyroid hormone active analogues from mixtures

International Nuclear Information System (INIS)

Kubo, Takuya; Matsumoto, Hideyuki; Shiraishi, Fujio; Nomachi, Makoto; Nemoto, Koji; Hosoya, Ken; Kaya, Kunimitsu

2007-01-01

We developed novel separation media for hydroxy polychlorinated biphenyls (HO-PCBs) using the molecular imprinting techniques. The results of evaluation for the molecularly imprinted polymers (MIPs) by the liquid chromatography (LC) suggested that MIPs had selective separation ability for certain HO-PCB analogues. The results of the LC evaluations and molecular modeling indicated that the molecular volumes and pK a values of template molecules were related with the retention factor of HO-PCBs. Additionally, according to the detail evaluation toward the selective separation behaviors of MIPs, these HO-PCB analogues have low pK a values dependent on their chemical structures. In other words, the prepared MIPs had selective recognition ability against the analogues, which have an OH group on a phenyl carbon and two chlorine atoms on the both neighboring carbons of the carbon attached with the OH group. Moreover, these analogues may have a potential for thyroid hormone activities so that we attempted to separate these analogues directly from mixtures of HO-PCBs using a prepared MIP

An evaluation of the Parents Plus-Parenting When Separated programme.

Science.gov (United States)

Keating, Adele; Sharry, John; Murphy, Michelle; Rooney, Brendan; Carr, Alan

2016-04-01

This study evaluated the Parents Plus-Parenting when Separated Programme, an intervention specifically designed to address the needs of separated parents in an Irish context. In a randomized control trial, 82 separated parents with young children were assigned to the Parents Plus-Parenting when Separated Programme treatment group and 79 to a waiting-list control group. They were assessed on measures of client goals, parenting satisfaction, child and parental adjustment and interparental conflict at baseline (Time 1) and 6 weeks later (Time 2), after the treatment group completed the Parents Plus-Parenting when Separated Programme. From Time 1 to 2, significant goal attainment, increases in parenting satisfaction and decreases in child behaviour problems, parental adjustment problems and interparental conflict occurred in the Parents Plus-Parenting when Separated Programme group, but not in the control group. These results supported the effectiveness of Parents Plus-Parenting when Separated Programme, which should be made more widely available to separated parents. © The Author(s) 2015.

An animal experimental model for evaluating endothelial damage caused by various angiographic contrast media

International Nuclear Information System (INIS)

Gottlob, R.

1981-01-01

The endothelial damage caused by X-ray contrast media is tested on en face preparations of the rat aorta after silver staining. Hypertonic contrast media cause dehydration of the vessels so that solutions of silver nitrate penetrate into the media during the phase of rehydration whereby medial transverse lines are stained. These artifacts can be avoided by 3 minute rehydration of the vessels by Ringer solution prior to silver staining. In addition it is recommended to add highly diluted silver nitrate to the fixing media in order to intensify the pattern of the endothelial silver lines. Modern contrast media may cause very little endothelial damage, however, significant differences can be detected when in addition to the evaluation of larger foci damages of single endothelial cells ( brown cells with sparing of the nuclei and pseudonuclei ) are evaluated as well. No significant differences were found between the endothelial toxicity of meglumin diatrizoate and meglumin iothalamate. (orig.) [de

Social media and internet driven study recruitment: evaluating a new model for promoting collaborator engagement and participation.

Science.gov (United States)

Khatri, Chetan; Chapman, Stephen J; Glasbey, James; Kelly, Michael; Nepogodiev, Dmitri; Bhangu, Aneel; Fitzgerald, J Edward

2015-01-01

A substantial challenge facing multicentre audit and research projects is timely recruitment of collaborators and their study centres. Cost-effective strategies are required and fee-free social media has previously been identified as a potential conduit. We investigated and evaluated the effectiveness of a novel multi-format social media and Internet strategy for targeted recruitment to a national multicentre cohort study. Interventions involved a new Twitter account, including weekly live question-and-answer sessions, a new Facebook group page, online YouTube presentations and an information page on a national association website. Link tracking analysis was undertaken using Google Analytics, which was then related to subsequent registration. Social influence was calculated using the proprietary Klout score. Internet traffic analysis identified a total of 1562 unique registration site views, of which 285 originated from social media (18.2%). Some 528 unique registrations were received, with 96 via social media platforms (18.2%). Traffic source analysis identified a separate national association webpage as resulting in the majority of registration page views (15.8%), followed by Facebook (11.9%), Twitter (4.8%) and YouTube (1.5%). A combination of publicity through Facebook, Twitter and the dedicated national association webpage contributed to the greatest rise in registration traffic and accounted for 312 (48%) of the total registrations within a 2-week period. A Twitter 'social influence' (Klout) score of 42/100 was obtained during this period. Targeted social media substantially aided study dissemination and collaborator recruitment. It acted as an adjunct to traditional methods, accounting for 18.2% of collaborator registration in a short time period with no associated financial costs. We provide a practical model for designing future recruitment campaigns, and recommend Facebook, Twitter and targeted websites as the most effective adjuncts for maximising cost

Social Media and Internet Driven Study Recruitment: Evaluating a New Model for Promoting Collaborator Engagement and Participation

Science.gov (United States)

Khatri, Chetan; Chapman, Stephen J.; Glasbey, James; Kelly, Michael; Nepogodiev, Dmitri; Bhangu, Aneel; Fitzgerald, J. Edward

2015-01-01

Aims A substantial challenge facing multicentre audit and research projects is timely recruitment of collaborators and their study centres. Cost-effective strategies are required and fee-free social media has previously been identified as a potential conduit. We investigated and evaluated the effectiveness of a novel multi-format social media and Internet strategy for targeted recruitment to a national multicentre cohort study. Methods Interventions involved a new Twitter account, including weekly live question-and-answer sessions, a new Facebook group page, online YouTube presentations and an information page on a national association website. Link tracking analysis was undertaken using Google Analytics, which was then related to subsequent registration. Social influence was calculated using the proprietary Klout score. Results Internet traffic analysis identified a total of 1562 unique registration site views, of which 285 originated from social media (18.2%). Some 528 unique registrations were received, with 96 via social media platforms (18.2%). Traffic source analysis identified a separate national association webpage as resulting in the majority of registration page views (15.8%), followed by Facebook (11.9%), Twitter (4.8%) and YouTube (1.5%). A combination of publicity through Facebook, Twitter and the dedicated national association webpage contributed to the greatest rise in registration traffic and accounted for 312 (48%) of the total registrations within a 2-week period. A Twitter ‘social influence’ (Klout) score of 42/100 was obtained during this period. Conclusions Targeted social media substantially aided study dissemination and collaborator recruitment. It acted as an adjunct to traditional methods, accounting for 18.2% of collaborator registration in a short time period with no associated financial costs. We provide a practical model for designing future recruitment campaigns, and recommend Facebook, Twitter and targeted websites as the most

Social media and internet driven study recruitment: evaluating a new model for promoting collaborator engagement and participation.

Directory of Open Access Journals (Sweden)

Chetan Khatri

Full Text Available A substantial challenge facing multicentre audit and research projects is timely recruitment of collaborators and their study centres. Cost-effective strategies are required and fee-free social media has previously been identified as a potential conduit. We investigated and evaluated the effectiveness of a novel multi-format social media and Internet strategy for targeted recruitment to a national multicentre cohort study.Interventions involved a new Twitter account, including weekly live question-and-answer sessions, a new Facebook group page, online YouTube presentations and an information page on a national association website. Link tracking analysis was undertaken using Google Analytics, which was then related to subsequent registration. Social influence was calculated using the proprietary Klout score.Internet traffic analysis identified a total of 1562 unique registration site views, of which 285 originated from social media (18.2%. Some 528 unique registrations were received, with 96 via social media platforms (18.2%. Traffic source analysis identified a separate national association webpage as resulting in the majority of registration page views (15.8%, followed by Facebook (11.9%, Twitter (4.8% and YouTube (1.5%. A combination of publicity through Facebook, Twitter and the dedicated national association webpage contributed to the greatest rise in registration traffic and accounted for 312 (48% of the total registrations within a 2-week period. A Twitter 'social influence' (Klout score of 42/100 was obtained during this period.Targeted social media substantially aided study dissemination and collaborator recruitment. It acted as an adjunct to traditional methods, accounting for 18.2% of collaborator registration in a short time period with no associated financial costs. We provide a practical model for designing future recruitment campaigns, and recommend Facebook, Twitter and targeted websites as the most effective adjuncts for

Supported ionic liquids: versatile reaction and separation media

DEFF Research Database (Denmark)

Riisager, Anders; Fehrmann, Rasmus; Haumann, Marco

2006-01-01

The latest developments in supported ionic liquid phase (SILP) systems for catalysis and separation technology are surveyed. The SILP concept combines the advantages of homogeneous catalysis with heterogeneous process technology, and a variety of reactions have been studied where supported ionic ...... liquid catalysts proved to be more active and selective than common systems. In separation applications the use of supported ionic liquids can facilitate selective transport of substrates across membranes.......The latest developments in supported ionic liquid phase (SILP) systems for catalysis and separation technology are surveyed. The SILP concept combines the advantages of homogeneous catalysis with heterogeneous process technology, and a variety of reactions have been studied where supported ionic...

A Preliminary Evaluation of a School-Based Media Education and Reduction Intervention.

Science.gov (United States)

Bickham, David S; Hswen, Yulin; Slaby, Ronald G; Rich, Michael

2018-06-01

While media education and reduction programs have been proposed to prevent adverse health and academic outcomes related to heavy electronic media use among school-aged children, few have been formally piloted and evaluated. We used a quasi-experimental design to evaluate the effectiveness of Take the Challenge (TtC), a school-based media education/reduction program for the primary prevention of sleep deprivation, dysfunctional social-emotional behaviors, and poor academic performance. Sixth- to eighth-grade students at a rural Midwestern U.S. middle school received the TtC program, while a similar school in the same district served as the comparison group. Health-related and academic measures were collected from students and teachers at both schools before and after the intervention. The primary outcome measure was student-reported electronic media use (television, video games, Internet). Secondary measures included student health behaviors (student-reported sleep, exercise, and outdoor play) and academic activities (teacher-reported homework and classroom performance). Compared to the comparison group, students receiving TtC slept more and reduced television viewing, background television time, after-school video gaming, and weekend Internet use. Teachers reported increases in the extent to which TtC students completed homework assignments and stayed on task in the classroom. Well-designed school-based programs such as TtC can reduce electronic media use among middle-school children and improve related health and academic outcomes.

Image of Refugees and Asylum-Seekers in the Media: An Evaluation on Media Politics

Directory of Open Access Journals (Sweden)

Suat Kolukırık

2009-06-01

Full Text Available The case of refugees and asylum-seekers constitutes one of the most important problems of today’s developed and developing countries. Immigration and sanctuary which arise generally from economic causes have reached a more intensified state due to deficiencies in the process of democratization and establishment of an environment of peace. Although it is difficult to provide an exact number, it is observed that a population of more than 10 million people in the world today continue their lives outside their home countries and seek new environments for survival. It is known that refugee mobility follows a route from the south to northern countries and in the case of Turkey it is realized along the coastal lines and through east/south highways, and occupies a significant area of coverage in the Turkish printed media. This article aims to analyze and evaluate the media language and discourse on the lives of refugees or asylum seekers through the perspective of democratization and human rights. Critical discourse analysis will be used to analyze the main axes of enquiry which include the news released in the Turkish printed media on refugees and asylum seekers, the approach adopted in shaping such news coverage, the messages they convey, and their role in molding public opinion

Separation of lanthanides through hydroxyapatite

International Nuclear Information System (INIS)

Garcia M, F.G.

2006-01-01

With the objective of obtaining from an independent way to each one of the lanthanides 151 Pm, 161 Tb, 166 Ho and 177 Lu free of carrier and with high specific activities starting from the indirect irradiation via, it intends in this work to determine the viability of separation of the couples Nd/Pm, Dy/Ho, Gd/Tb and Yb/Lu, by means of ion exchange column chromatography, using hydroxyapatite (HAp) and fluorite like absorbent material in complexing media. It is important to mention that have registered separation studies among lanthanides of the heavy group with those of the slight group, using the same mass and, in comparison with this work, quantities different from the father were used and of the son, also, that the separation studies were carried out among neighboring lanthanides. In this investigation, it was determined the effect that its have the complexing media: KSCN, sodium tartrate, sodium citrate, EDTA and aluminon, their pH and concentration, in the adsorption of the lanthanides in both minerals, in order to determine the chromatographic conditions for separation of the couples Nd/Pm, Dy/Ho, Gd/Tb and Yb/Lu. The work consists of five chapters, in the first one they are presented a theoretical introduction of the characteristics more important of the lanthanides, the hydroxyapatite and the fluorite; in the second, it is deepened in the ion exchange, as well as the two techniques (XRD and High Vacuum Electron Microscopy) to make the characterization of LnCI 3 (Ln = Nd, Gd, Dy or Yb) synthesized. The third chapter, it describes the methodology continued in our experimental work; in the room, its are presented the obtained results of the static and dynamic method to determine the viability of separation of neighboring lanthanides; and finally, the five chapter shows the conclusions. In this study, it is concludes that the separation among neighboring lanthanides cannot be carried out in the minerals and used media; because practically these lanthanides

Evaluation of interlayer ferromagnetic coupling for stacked media by adding reference layer

International Nuclear Information System (INIS)

Tham, K K; Saito, S; Itagaki, N; Hinata, S; Takahashi, M; Hasegawa, D

2011-01-01

The trial for quantitative evaluation of interlayer ferromagnetic coupling between granular and cap layer in stacked media is reported. The evaluation is realized by analyzing M-H loop of stacked media with another reference layer added on the cap layer. The reference layer is antiferromagnetically coupled with the cap layer through non-magnetic spacer layer. In this experiment, Rh which leads to antiferromagnetic coupling constant along film normal direction of around 2 erg/cm 2 was used as non-magnetic spacer layer. According to the evaluation result done by this method, when thickness of the spacer Pd layer between granular layer and cap layer is increased to 1.1 nm, ferromagnetic coupling constant is weakened to 7.2 erg/cm 2 which results in reduction of saturation field.

A Subjective Evaluation of the Minimum Audible Channel Separation in Binaural Reproduction Systems Through Loudspeakers

DEFF Research Database (Denmark)

Lacouture Parodi, Yesenia; Rubak, Per

2010-01-01

To evaluate the performance of crosstalk cancellation systems the channel separation is usually used as parameter.  However, no systematic evaluation of the minimum audible channel separation has been found in the literature known by the authors.  This paper describes a set of subjective experime......To evaluate the performance of crosstalk cancellation systems the channel separation is usually used as parameter.  However, no systematic evaluation of the minimum audible channel separation has been found in the literature known by the authors.  This paper describes a set of subjective...... simulated.  Results indicate that  in order to avoid lateralization the  channel separation should be below -15dB for most of the stimuli and around -20dB for broad-band noise....

Playing the Ranking Game: Media Coverage of the Evaluation of the Quality of Research in Italy

Science.gov (United States)

Blasi, Brigida; Romagnosi, Sandra; Bonaccorsi, Andrea

2017-01-01

University rankings have raised huge interest in the social sciences because of their methodological foundations and impact. Rankings have also gained popularity in the media system. In this article we analyze the coverage offered by the media to the Italian Research Evaluation exercise--VQR 2004-2010. Even though this evaluation did not have…

Bioadhesive agents in addition to oral contrast media - evaluation in an animal model

International Nuclear Information System (INIS)

Conrad, R.; Schneider, G.; Textor, J.; Schild, H.H.; Fimmers, R.

1998-01-01

Purpose: To evaluate the additional effect of bioadhesives in combination with iotrolan and barium as oral contrast media in an animal model. Method: The bioadhesives Noveon, CMC, Tylose and Carbopol 934 were added to iotrolan and barium. The solutions were administered to rabbits by a feeding tube. The animals were investigated by computed tomography (CT) and radiography after 0,5, 4, 12, 24 and in part after 48 hours. Mucosal coating and contrast filling of the bowel were evaluated. Results: Addition of bioadhesives to oral contrast media effected long-term contrast in the small intestine and colon, but no improvement in continuous filling and coating of the gastrointestinal tract was detected. Mucosal coating was seen only in short regions of the caecum and small intestine. In CT the best results for coating were observed with tylose and CMC, in radiography additionally with carbopol and noveon. All contrast medium solutions were well tolerated. Conclusion: The evaluated contrast medium solutions with bioadhesives have shown long-term contrast but no improvement in coating in comparison to conventional oral contrast media. (orig.) [de

Evaluation of the effect of media velocity on HEPA filter performance

International Nuclear Information System (INIS)

Alderman, Steven; Parsons, Michael; Hogancamp, Kristina; Norton, O. Perry; Waggoner, Charles

2007-01-01

Section FC of the ASME AG-1 Code addresses glass fiber HEPA filters and restricts the media velocity to a maximum of 2.54 cm/s (5 ft/min). Advances in filter media technology allow glass fiber HEPA filters to function at significantly higher velocities and still achieve HEPA performance. However, diffusional capture of particles < 100 nm is reduced at higher media velocities due to shorter residence times within the media matrix. Therefore, it is unlikely that higher media velocities for HEPA filters will be allowed without data to demonstrate the effect of media velocity on removal of particles in the smaller size classes. In order to address this issue, static testing has been conducted to generate performance related data and a range of dynamic testing has provided data regarding filter lifetimes, loading characteristics, changes in filter efficiency and the most penetrating particle size over time. Testing was conducted using 31 cm x 31 cm x 29 cm deep pleat HEPA filters supplied from two manufacturers. Testing was conducted at media velocities ranging from 2.0-4.5 cm/s with a solid aerosol challenge composed of potassium chloride. Two set of media velocity data were obtained for each filter type. In one set of evaluations, the maximum aerosol challenge particle size was limited to 3 μm, while particles above 3 μm were not constrained in the second set. This provided for considerable variability in the challenge mass mean diameter and overall mass loading rate. Results of this testing will be provided to the ASME AG-1 FC Committee for consideration in future versions of the HEPA standard. In general, the initial filter efficiency decreased with increasing media velocity. However, initial filter efficiencies were generally good in all cases. Filter efficiency values averaged over the first ten minute of the loading cycle ranged from 99.970 to 99.996 %. Additionally, the most penetrating particle size was observed to decrease with increasing media velocity

Preventing DoS attacks in peer-to-peer media streaming systems

Science.gov (United States)

Conner, William; Nahrstedt, Klara; Gupta, Indranil

2006-01-01

This paper presents a framework for preventing both selfishness and denial-of-service attacks in peer-to-peer media streaming systems. Our framework, called Oversight, achieves prevention of these undesirable activities by running a separate peer-to-peer download rate enforcement protocol along with the underlying peer-to-peer media streaming protocol. This separate Oversight protocol enforces download rate limitations on each participating peer. These limitations prevent selfish or malicious nodes from downloading an overwhelming amount of media stream data that could potentially exhaust the entire system. Since Oversight is based on a peer-to-peer architecture, it can accomplish this enforcement functionality in a scalable, efficient, and decentralized way that fits better with peer-to-peer media streaming systems compared to other solutions based on central server architectures. As peer-to-peer media streaming systems continue to grow in popularity, the threat of selfish and malicious peers participating in such large peer-to-peer networks will continue to grow as well. For example, since peer-to-peer media streaming systems allow users to send small request messages that result in the streaming of large media objects, these systems provide an opportunity for malicious users to exhaust resources in the system with little effort expended on their part. However, Oversight addresses these threats associated with selfish or malicious peers who cause such disruptions with excessive download requests. We evaluated our Oversight solution through simulations and our results show that applying Oversight to peer-to-peer media streaming systems can prevent both selfishness and denial-of-service attacks by effectively limiting the download rates of all nodes in the system.

Extraction and separation studies of uranium(VI) with tris-(2-ethyl hexyl) phosphate

International Nuclear Information System (INIS)

Sundaramurthi, N.M.; Desai, G.S.; Shinde, V.M.

1990-01-01

A solvent extraction method is proposed for the extraction and separation of uranium from salicylate media using tris-(2-ethyl hexyl) phosphate dissolved in xylene as an extractant. The optimum conditions were evaluated from a critical study of pH, salicylate concentration, extractant concentration, period of equilibration and diluent. The method permits the separation of uranium from thorium, cerium, titanium, zirconium, hafnium, copper, vanadium and chromium from binary mixtures and is applicable to the analysis of uranium in synthetic samples. The method is precise, accurate, fast and selective. (author) 5 refs.; 2 tabs

Fluid-transfer properties of recombinant battery separator media

Energy Technology Data Exchange (ETDEWEB)

Zguris, G.C. [Hollingsworth and Vose, Groton, MA (United States)

2000-05-01

The fluid-transfer properties of the separator play a critical role in both acid- and alkaline-based batteries. These properties are of particular importance in a lead-acid battery since the sulfuric acid is an active component of the battery reaction; the acid is depleted as the battery discharges. In a flooded lead-acid, the function of the separator to deliver acid is less significant than in a valve-regulated design. This paper discusses some issues with regards to this important interaction. (orig.)

Mild separation system for olive oil: quality evaluation and pilot plant design

Directory of Open Access Journals (Sweden)

Francesco Genovese

2013-09-01

Full Text Available The entire process of olive oil extraction involves the breakage of olive fruits to obtain a paste, the kneading of the paste, a centrifugation, and a further cleaning, performed by a disc stack centrifuge, to separate the residual water. In this research, in order to evaluate the effect of final centrifugal separation on olive oil quality and to both define and design the settings of a innovative separation system, olive oil was separated off from water using an accelerated separation process, tested in comparison with a disc centrifuge. The laboratory plant used for the trials was constituted by a twin cylindrical separator equipped with 4 variable frequency inverters, in order to regulate the fluid flow rates in the plant. Oil samples were collected during the trials to evaluate the influence of the proposed innovative process on oil quality; measuring some parameters as free acidity, peroxides (PV, specific extinction coefficients K232 and K270, chlorophylls , carotenoids, total polyphenols (POL and turbidity. Results showed statistically significant differences (p-values<0.05 in some parameters as POL, PV, and ultraviolet absorption K232 and K270.

Design and Evaluation of Nextgen Aircraft Separation Assurance Concepts

Science.gov (United States)

Johnson, Walter; Ho, Nhut; Arutyunov, Vladimir; Laue, John-Luke; Wilmoth, Ian

2012-01-01

To support the development and evaluation of future function allocation concepts for separation assurance systems for the Next Generation Air Transportation System, this paper presents the design and human-in-the-loop evaluation of three feasible function allocation concepts that allocate primary aircraft separation assurance responsibilities and workload to: 1) pilots; 2) air traffic controllers (ATC); and 3) automation. The design of these concepts also included rules of the road, separation assurance burdens for aircraft of different equipage levels, and utilization of advanced weather displays paired with advanced conflict detection and resolution automation. Results of the human-in-the-loop simulation show that: a) all the concepts are robust with respect to weather perturbation; b) concept 1 (pilots) had highest throughput, closest to assigned spacing, and fewest violations of speed and altitude restrictions; c) the energy of the aircraft during the descent phase was better managed in concepts 1 and 2 (pilots and ATC) than in concept 3 (automation), in which the situation awareness of pilots and controllers was lowest, and workload of pilots was highest. The paper also discusses further development of these concepts and their augmentation and integration with future air traffic management tools and systems that are being considered for NextGen.

Evaluation of Soil Media for Stormwater Infiltration Best Management Practices (BMPs)

Science.gov (United States)

This project will improve the performance of structural management practices, and provide guidance that will allow designers to balance infiltration rates with sorption capacity. This project will also perform a standard column test procedure for evaluating candidate soil media.

Magnetic Separations with Magnetite: Theory, Operation, and Limitations

Energy Technology Data Exchange (ETDEWEB)

G. B. Cotten

2000-08-01

This dissertation documents the theory development and experimental plan followed to describe how a magnetite-based column under the influence of an external magnetic field functions as a magnetic separator. Theoretical simulations predict that weekly paramagnetic particles in the sub-micron range can be magnetically separated while diamagnetic particles as large as 2 microns in diameter may pass. Magnetite-based columns were evaluated as magnetically-controllable enhanced filtration devices. There was no evidence of enhanced filtration for diamagnetic particles by the magnetite-based bed. Magnetite-based magnetic separators have proven to be effective in specific laboratory experiments, indicating a potential feasibility for scale-up operations. Column media-filter type filtration effects indicate a magnetite-based column would not be suitable for treatment of a waste stream with a high diamagnetic solids content or high volume throughput requirements. Specific applications requiring removal of sub-micron para- or ferromagnetic particles under batch or Stokes flow conditions would be most applicable.

Magnetic Separations with Magnetite: Theory, Operation, and Limitations

International Nuclear Information System (INIS)

Cotten, G.B.

2000-01-01

This dissertation documents the theory development and experimental plan followed to describe how a magnetite-based column under the influence of an external magnetic field functions as a magnetic separator. Theoretical simulations predict that weekly paramagnetic particles in the sub-micron range can be magnetically separated while diamagnetic particles as large as 2 microns in diameter may pass. Magnetite-based columns were evaluated as magnetically-controllable enhanced filtration devices. There was no evidence of enhanced filtration for diamagnetic particles by the magnetite-based bed. Magnetite-based magnetic separators have proven to be effective in specific laboratory experiments, indicating a potential feasibility for scale-up operations. Column media-filter type filtration effects indicate a magnetite-based column would not be suitable for treatment of a waste stream with a high diamagnetic solids content or high volume throughput requirements. Specific applications requiring removal of sub-micron para- or ferromagnetic particles under batch or Stokes flow conditions would be most applicable

The development of children's language and ethical media competences and media skills

OpenAIRE

Valli, Raine; Hautaviita, Janika; Meriläinen, Merja

2015-01-01

The children's developing media competences and media skills are evaluated in this article on the basis of the evaluation indicator developed by Hautaviita (2012). The indicator has been developed for measuring the 6–9-year-old children's (the preschoolers and the pupils in grades 1-2) media competences. In it, the children's developing media skills are divided into practical, social, language and ethical media competences, of which this article concentrates on the last two, language and ethi...

Characteristic evaluation of cooling technique using liquid nitrogen and metal porous media

International Nuclear Information System (INIS)

Tanno, Yusuke; Ito, Satoshi; Hashizume, Hidetoshi

2014-01-01

A remountable high-temperature superconducting magnet, whose segments can be mounted and demounted repeatedly, has been proposed for construction and maintenance of superconducting magnet and inner reactor components of a fusion reactor. One of the issues in this design is that the performance of the magnet deteriorates by a local temperature rise due to Joule heating in jointing regions. In order to prevent local temperature rise, a cooling system using a cryogenic coolant and metal porous media was proposed and experimental studies have been carried out using liquid nitrogen. In this study, flow and heat transfer characteristics of cooling system using subcooled liquid nitrogen and bronze particle sintered porous media are evaluated through experiments in which the inlet degree of subcooling and flow rate of the liquid nitrogen. The flow characteristics without heat input were coincided with Ergun’s equation expressing single-phase flow in porous materials. The obtained boiling curve was categorized into three conditions; convection region, nucleate boiling region and mixed region with nucleate and film boiling. Wall superheat did not increase drastically with porous media after departure from nucleate boiling point, which is different from a situation of usual boiling curve in a smooth tube. The fact is important characteristic to cooling superconducting magnet to avoid its quench. Heat transfer coefficient with bronze particle sintered porous media was at least twice larger than that without the porous media. It was also indicated qualitatively that departure from nucleate boiling point and heat transfer coefficient depends on degree of subcooling and mass flow rate. The quantitative evaluation of them and further discussion for the cooling system will be performed as future tasks

High-functionalization of fiber-forming materials. Polymer membrane as separation media

Energy Technology Data Exchange (ETDEWEB)

Kamide, Kenji; Iijima, Hideki (Asahi Chemical Industry Co. Ltd., Osaka, (Japan))

1989-07-05

For obtaining higher functions by donating specific functions to the fiber, it is effective to change its structure. Various separating films which is known as an example of the high-functionalization of the fiber materials is an example of the fiber structure conversion from the view-point of substance-permeating function. This report firstly describes the features and types of the film separation method and the production of films, and then on the correlation between the structure and functions of the fibers, the correlation of the structure and the separating characteristics of the films, and the mechanism of the emergence of the film structure. Finally, applied examples of the film separating method in the medical field are described. In the medical liquid film separation, blood or plasma are the object of the separation. Blood has various components whose concentration and particle size are multiplicated, and yet requires a tremendous separating accuracy when compared with the industrial separation. Examples are a blood dialyzer film and an ultrafiltration film (film for plasma separation and virus separation), etc.. 28 refs., 6 figs., 2 tabs.

Evaluation of Biaxial Mechanical Properties of Aortic Media Based on the Lamellar Microstructure

Directory of Open Access Journals (Sweden)

Hadi Taghizadeh

2015-01-01

Full Text Available Evaluation of the mechanical properties of arterial wall components is necessary for establishing a precise mechanical model applicable in various physiological and pathological conditions, such as remodeling. In this contribution, a new approach for the evaluation of the mechanical properties of aortic media accounting for the lamellar structure is proposed. We assumed aortic media to be composed of two sets of concentric layers, namely sheets of elastin (Layer I and interstitial layers composed of mostly collagen bundles, fine elastic fibers and smooth muscle cells (Layer II. Biaxial mechanical tests were carried out on human thoracic aortic samples, and histological staining was performed to distinguish wall lamellae for determining the dimensions of the layers. A neo-Hookean strain energy function (SEF for Layer I and a four-parameter exponential SEF for Layer II were allocated. Nonlinear regression was used to find the material parameters of the proposed microstructural model based on experimental data. The non-linear behavior of media layers confirmed the higher contribution of elastic tissue in lower strains and the gradual engagement of collagen fibers. The resulting model determines the nonlinear anisotropic behavior of aortic media through the lamellar microstructure and can be assistive in the study of wall remodeling due to alterations in lamellar structure during pathological conditions and aging.

Seeds of Cross-Media Production

DEFF Research Database (Denmark)

Bødker, Susanne; Petersen, Anja Bechmann

2007-01-01

separately and of cross-media production. Since cross-media production is in the making, we study the instruments currently used for planning and coordination, and analyze them as seeds that will eventually make cross-media production happen. Time and timing are important in news production in general......We present an empirical study of an organization that has recently moved from traditional newspaper production towards cross-media production involving the integrated digital production of newspaper, television, radio and web-news. The paper focuses on the daily production rhythms of the media...... with planning and coordination. We demonstrate how the production rhythms of the individual media collide with that of cross-media, and how product lifecycle rhythms add to the list of causes of problems that may jeopardize crossmedia production. We propose to strengthen planning and overview support elements...

Evaluating the Impact of Social Media Marketing on Online Course Registration

Science.gov (United States)

Spackman, Jonathan S.; Larsen, Ross

2017-01-01

This article validated one possible method, found in the luxury fashion industry, for evaluating the effectiveness of Facebook marketing activities on increasing enrollments in continuing higher education online courses. A survey assessing the qualities of social media marketing, value equity, relationship equity, brand equity, and purchase…

Measuring motivations for media exposure: A thesis

NARCIS (Netherlands)

Hendriks Vettehen, P.G.J.; Snippenburg, L.B. van

2002-01-01

The present article discusses the problem of separating the motivation conceptempirically from other relevant concepts in research on mass media audiences. For about half a century, audience researchers use questionnaire items with adistinct format as measurements of motivations for media exposure.

Extraction behaviour of 2-octylaminopyridine towards lead(II) from succinate media and its separation from other toxic metals

International Nuclear Information System (INIS)

Mane, Chandrashekhar P.; Anuse, Mansing A.

2008-01-01

Liquid-liquid extraction of lead(II) from succinate media was carried out with 2-octylaminopyridine (2-OAP) in chloroform. Lead(II) was quantitatively extracted with 0.036 M 2-OAP in chloroform from 0.005-0.007 M sodium succinate when equilibrated for 5 min. Lead(II) from the organic phase was stripped with three 10 mL portions of 0.4 M acetic acid and determined titrimetrically with EDTA. The nature of extracted species was determined from the log-log plot. The optimum conditions have been evaluated based on a critical study of weak acid concentration, extractant concentration, period of equilibration and effect of diluents. The metal loading capacity of the reagent was found to be 8 mg of lead(II) with 10 mL 0.036 M of the extractant. The extraction of the lead(II) was carried out in presence of various ions to ascertain the tolerance limit of individual. Temperature dependence of the extraction equilibrium constants was examined to estimate the apparent thermodynamic functions (ΔH, ΔS and ΔG) for extraction reaction. Lead(II) was successfully separated from commonly associated metal ions such as Bi(III), Hg(II), Cr(VI), Cd(II), Zn(II), Al(III), Ca(II), Ba(II) and from binary and ternary mixtures. The method was extended for determination of lead(II) in real samples

Effects of Valenced Media Frames of Cancer Diagnoses and Therapies: Quantifying the Transformation and Establishing of Evaluative Schemas.

Science.gov (United States)

Guenther, Lars; Froehlich, Klara; Milde, Jutta; Heidecke, Gitte; Ruhrmann, Georg

2015-01-01

Journalists portray health issues within different frames, which may shape news recipients' evaluations, attitudes, and behaviors. As the research on framing continues to face theoretical challenges and methodological concerns, this study examines the transformation and establishing of evaluative schemas, which are steps in the process toward attitudinal change. The study measures recipients' evaluations of actual television clips dealing with cancer diagnoses and cancer therapies. Two valenced (positive vs. negative) media frames were tested in a 3-week online panel (n = 298) using a pretest-posttest design with a German sample. The results offer limited support for the hypothesis that media frames transform participants' schemas, but do not support the hypothesis that new schemas are established in response to media frames. The study also investigates interactions between framing and participants' issue involvement, as well as between framing and topic-specific interest and media use.

An Evaluation of the Impact of E-Learning Media Formats on Student Perception and Performance

Science.gov (United States)

Kurbel, Karl; Stankov, Ivo; Datsenka, Rastsislau

Factors influencing student evaluation of web-based courses are analyzed, based on student feedback from an online distance-learning graduate program. The impact of different media formats on the perception of the courses by the students as well as on their performance in these courses are examined. In particular, we studied conventional hypertext-based courses, video-based courses and audio-based courses, and tried to find out whether the media format has an effect on how students assess courses and how good or bad their grades are. Statistical analyses were performed to answer several research questions related to the topic and to properly evaluate the factors influencing student evaluation.

Enable, Engage and Evaluate: Introducing the 3E Social Media Strategy Canvas Based on the European Airline Industry

NARCIS (Netherlands)

Spil, Antonius A.M.; Effing, Robin; Both, Menno P.; Dwivedi, Yogesh K.; Mantymaki, Matti; Ravishankar, M.N.; Janssen, Marijn; Clement, Marc; Slade, Emma L.; Rana, Nripendra P.; Al-Sharhan, Salah; Simintiras, Antonis C.

2016-01-01

The strategic use of social media has increased in importance. However, there is a lack of theory to design and evaluate social media strategies. In a competitive environment, airlines need to excel on service, customer satisfaction and marketing. Social media could support those areas of business.

Designing and Testing an Inventory for Measuring Social Media Competency of Certified Health Education Specialists.

Science.gov (United States)

Alber, Julia M; Bernhardt, Jay M; Stellefson, Michael; Weiler, Robert M; Anderson-Lewis, Charkarra; Miller, M David; MacInnes, Jann

2015-09-23

. Psychometric analyses of the data revealed acceptable reliability evidence for the following scales: Social Media Self-Efficacy (alpha=.98, item reliability=.98, item separation=6.76), Social Media Experience (alpha=.98, item reliability=.98, item separation=6.24), Effort Expectancy(alpha =.74, item reliability=.95, item separation=4.15), Performance Expectancy (alpha =.81, item reliability=.99, item separation=10.09), Facilitating Conditions (alpha =.66, item reliability=.99, item separation=16.04), and Social Influence (alpha =.66, item reliability=.93, item separation=3.77). There was some evidence of local dependence among the scales, with several observed residual correlations above |.20|. Through the multistage instrument-development process, sufficient reliability and validity evidence was collected in support of the purpose and intended use of the SMCI. The SMCI can be used to assess the readiness of health education specialists to effectively use social media for health promotion research and practice. Future research should explore associations across constructs within the SMCI and evaluate the ability of SMCI scores to predict social media use and performance among CHES and MCHES.

An evaluation of the role of the mass media in conflict management ...

African Journals Online (AJOL)

An evaluation of the role of the mass media in conflict management: The Niger ... ups and downs to the public within the ambit of social responsibility theory of the ... Thus, blowing mere misunderstanding and misconception of issues from the ...

Evaluating social media's capacity to develop engaged audiences in health promotion settings: use of Twitter metrics as a case study.

Science.gov (United States)

Neiger, Brad L; Thackeray, Rosemary; Burton, Scott H; Giraud-Carrier, Christophe G; Fagen, Michael C

2013-03-01

Use of social media in health promotion and public health continues to grow in popularity, though most of what is reported in literature represents one-way messaging devoid of attributes associated with engagement, a core attribute, if not the central purpose, of social media. This article defines engagement, describes its value in maximizing the potential of social media in health promotion, proposes an evaluation hierarchy for social media engagement, and uses Twitter as a case study to illustrate how the hierarchy might function in practice. Partnership and participation are proposed as culminating outcomes for social media use in health promotion. As use of social media in health promotion moves toward this end, evaluation metrics that verify progress and inform subsequent strategies will become increasingly important.

Pore size distribution effect on rarefied gas transport in porous media

Science.gov (United States)

Hori, Takuma; Yoshimoto, Yuta; Takagi, Shu; Kinefuchi, Ikuya

2017-11-01

Gas transport phenomena in porous media are known to strongly influence the performance of devices such as gas separation membranes and fuel cells. Knudsen diffusion is a dominant flow regime in these devices since they have nanoscale pores. Many experiments have shown that these porous media have complex structures and pore size distributions; thus, the diffusion coefficient in these media cannot be easily assessed. Previous studies have reported that the characteristic pore diameter of porous media can be defined in light of the pore size distribution; however, tortuosity factor, which is necessary for the evaluation of diffusion coefficient, is still unknown without gas transport measurements or simulations. Thus, the relation between pore size distributions and tortuosity factors is required to obtain the gas transport properties. We perform numerical simulations to prove the relation between them. Porous media are numerically constructed while satisfying given pore size distributions. Then, the mean-square displacement simulation is performed to obtain the tortuosity factors of the constructed porous media.. This paper is based on results obtained from a project commissioned by the New Energy and Industrial Development Organization (NEDO).

Extractive separation of tellurium(4)

International Nuclear Information System (INIS)

Gawali, S.B.; Shinde, V.M.

1977-01-01

A method is described for the extraction of tellurium (4) from hydrobromic acid media using 4-methyl-2-pentanol as an extractant. The method affords the determination of tellurium after its separation from Se, Au, Cu, Pb, Fe, Os, V and Al. (author)

Researching media through practices: an ethnographic approach

Directory of Open Access Journals (Sweden)

Antoni Roig

2009-05-01

Full Text Available Anthropological and ethnographic research on media have been largely focused on analyzing reception of media products (television, radio, press and film and media consumption related to domestic appropriation of technologies (Rothenbuhler et al., 2005. There is also a wide body of research devoted to the study of the political dimension of alternative and indigenous media (Ginsburg, 2002. However, there has been a separation between media and internet studies, and between the analysis of media reception and practices of self-production, such as family photography or home video. Current digital media practices urge reexamination of self-produced content and media flows from a broader perspective that cuts across divisions between public and private, corporative media products and people's releases, home production and cultural industry, political activism and everyday life.

Comparison of gas membrane separation cascades using conventional separation cell and two-unit separation cells

International Nuclear Information System (INIS)

Ohno, Masayoshi; Morisue, Tetsuo; Ozaki, Osamu; Miyauchi, Terukatsu.

1978-01-01

The adoption of two-unit separation cells in radioactive rare gas membrane separation equipment enhances the separation factor, but increases the required membrane area and compressive power. An analytical economic evaluation was undertaken to compare the conventional separation cell with the two-unit separation cells, adopting as parameters the number of cascade stages, the membrane area and the operating power requirements. This paper describes the models used for evaluating the separation performance and the economics of cascade embodying these different concepts of separation cell taken up for study, and the results obtained for the individual concepts are mutually compared. It proved that, in respect of the number required of cascade stages, of operating power requirements and of the annual expenditure, better performance could always be expected of the two-unit separation cells as compared with the conventional separation cell, at least in the range of parameters adopted in this study. As regards the minimum membrane area, the conventional separation cell and the series-type separation cell yielded almost the same values, with the parallel-type separation cell falling somewhat behind. (auth.)

Photon activation therapy: a Monte Carlo study on dose enhancement by various sources and activation media

International Nuclear Information System (INIS)

Bakhshabadi, Mahdi; Ghorbani, Mahdi; Meigooni, Ali Soleimani

2013-01-01

In the present study, a number of brachytherapy sources and activation media were simulated using MCNPX code and the results were analyzed based on the dose enhancement factor values. Furthermore, two new brachytherapy sources ( 131 Cs and a hypothetical 170 Tm) were evaluated for their application in photon activation therapy (PAT). 125 I, 103 Pd, 131 Cs and hypothetical 170 Tm brachytherapy sources were simulated in water and their dose rate constant and the radial dose functions were compared with previously published data. The sources were then simulated in a soft tissue phantom which was composed of Ag, I, Pt or Au as activation media uniformly distributed in the tumour volume. These simulations were performed using the MCNPX code, and dose enhancement factor (DEF) was obtained for 7, 18 and 30 mg/ml concentrations of the activation media. Each source, activation medium and concentration was evaluated separately in a separate simulation. The calculated dose rate constant and radial dose functions were in agreement with the published data for the aforementioned sources. The maximum DEF was found to be 5.58 for a combination of the 170 Tm source with 30 mg/ml concentration of I. The DEFs for 131 Cs and 170 Tm sources for all the four activation media were higher than those for other sources and activation media. From this point of view, these two sources can be more useful in photon activation therapy with photon emitter sources. Furthermore, 131 Cs and 170 Tm brachytherapy sources can be proposed as new options for use in the field of PAT.

Social Media Indicator and Local Elections in the Netherlands: Towards a Framework for Evaluating the Influence of Twitter, YouTube, and Facebook

NARCIS (Netherlands)

Effing, R.; van Hillegersberg, Jos; Huibers, Theo W.C.; Zahid Sobaci, M.

2015-01-01

Social media has become a popular tool in the political landscape. As a result, it is of increased importance to evaluate social media campaigns of politicians. However, there is currently little knowledge how to measure and evaluate the influence of social media in political campaigns, especially

A formative evaluation of social media campaign to reduce adolescent dating violence.

Science.gov (United States)

Lambert, Danielle N; Bishop, Lauren E; Guetig, Stephanie; Frew, Paula M

2014-11-12

The Emory Jane Fonda Center implemented the Start Strong Atlanta social marketing campaign, "Keep It Strong ATL", in 2007 to promote the development of healthy adolescent relationships and to foster the prevention of adolescent dating abuse among 11-14 year olds. A formative evaluation was conducted to understand whether messages directed at the target audience were relevant to the program's relationship promotion and violence prevention goals, and whether the "Web 2.0" social media channels of communication (Facebook, Twitter, YouTube, Flickr, Tumblr, and Pinterest) were reaching the intended audience. Mixed methodologies included qualitative interviews and a key informant focus group, a cross-sectional survey, and web analytics. Qualitative data were analyzed using constant comparative methodology informed by grounded theory. Descriptive statistics were generated from survey data, and web analytics provided user information and traffic patterns. Results indicated that the Keep It Strong ATL social marketing campaign was a valuable community resource that had potential for broader scope and greater reach. The evaluation team learned the importance of reaching adolescents through Web 2.0 platforms, and the need for message dissemination via peers. Survey results indicated that Facebook (ranked 6.5 out of 8) was the highest rated social media outlet overall, and exhibited greatest appeal and most frequent visits, yet analytics revealed that only 3.5% of "likes" were from the target audience. These results indicate that the social media campaign is reaching predominantly women (76.5% of viewership) who are outside of the target age range of 11-14 years. While the social media campaign was successfully launched, the findings indicate the need for a more focused selection of communication channels, timing of media updates to maximize visibility, balancing message tone and delivery, and incorporating differentiated messaging for the target audiences. Collaboration with

Wet separation processes as method to separate limestone and oil shale

Science.gov (United States)

Nurme, Martin; Karu, Veiko

2015-04-01

Biggest oil shale industry is located in Estonia. Oil shale usage is mainly for electricity generation, shale oil generation and cement production. All these processes need certain quality oil shale. Oil shale seam have interlayer limestone layers. To use oil shale in production, it is needed to separate oil shale and limestone. A key challenge is find separation process when we can get the best quality for all product types. In oil shale separation typically has been used heavy media separation process. There are tested also different types of separation processes before: wet separation, pneumatic separation. Now oil shale industry moves more to oil production and this needs innovation methods for separation to ensure fuel quality and the changes in quality. The pilot unit test with Allmineral ALLJIG have pointed out that the suitable new innovation way for oil shale separation can be wet separation with gravity, where material by pulsating water forming layers of grains according to their density and subsequently separates the heavy material (limestone) from the stratified material (oil shale)bed. Main aim of this research is to find the suitable separation process for oil shale, that the products have highest quality. The expected results can be used also for developing separation processes for phosphorite rock or all others, where traditional separation processes doesn't work property. This research is part of the study Sustainable and environmentally acceptable Oil shale mining No. 3.2.0501.11-0025 http://mi.ttu.ee/etp and the project B36 Extraction and processing of rock with selective methods - http://mi.ttu.ee/separation; http://mi.ttu.ee/miningwaste/

Evaluation of Mars CO2 Capture and Gas Separation Technologies

Science.gov (United States)

Muscatello, Anthony C.; Santiago-Maldonado, Edgardo; Gibson, Tracy; Devor, Robert; Captain, James

2011-01-01

Recent national policy statements have established that the ultimate destination of NASA's human exploration program is Mars. In Situ Resource Utilization (ISRU) is a key technology required to ,enable such missions and it is appropriate to review progress in this area and continue to advance the systems required to produce rocket propellant, oxygen, and other consumables on Mars using the carbon dioxide atmosphere and other potential resources. The Mars Atmospheric Capture and Gas separation project is selecting, developing, and demonstrating techniques to capture and purify Martian atmospheric gases for their utilization for the production of hydrocarbons, oxygen, and water in ISRU systems. Trace gases will be required to be separated from Martian atmospheric gases to provide pure CO2 to processing elements. In addition, other Martian gases, such as nitrogen and argon, occur in concentrations high enough to be useful as buffer gas and should be captured as well. To achieve these goals, highly efficient gas separation processes will be required. These gas separation techniques are also required across various areas within the ISRU project to support various consumable production processes. The development of innovative gas separation techniques will evaluate the current state-of-the-art for the gas separation required, with the objective to demonstrate and develop light-weight, low-power methods for gas separation. Gas separation requirements include, but are not limited to the selective separation of: (1) methane and water from unreacted carbon oxides (C02-CO) and hydrogen typical of a Sabatier-type process, (2) carbon oxides and water from unreacted hydrogen from a Reverse Water-Gas Shift process, (3)/carbon oxides from oxygen from a trash/waste processing reaction, and (4) helium from hydrogen or oxygen from a propellant scavenging process. Potential technologies for the separations include' freezers, selective membranes, selective solvents, polymeric sorbents

Evaluation plan for a cardiological multi-media workstation (I4C project)

NARCIS (Netherlands)

Hofstede, J.W. van der; Quak, A.B.; Ginneken, A.M. van; Macfarlane, P.W.; Watson, J.; Hendriks, P.R.; Zeelenberg, C.

1997-01-01

The goal of the I4C project (Integration and Communication for the Continuity of Cardiac Care) is to build a multi-media workstation for cardiac care and to assess its impact in the clinical setting. This paper describes the technical evaluation plan for the prototype.

Media Exposure and Genetic Literacy Skills to Evaluate Angelina Jolie's Decision for Prophylactic Mastectomy.

Science.gov (United States)

Abrams, Leah R; Koehly, Laura M; Hooker, Gillian W; Paquin, Ryan S; Capella, Joseph N; McBride, Colleen M

2016-01-01

To examine public preparedness to evaluate and respond to Angelina Jolie's well-publicized decision to have a prophylactic mastectomy. A consumer panel (n = 1,008) completed an online survey in November 2013, reporting exposure to Jolie's story, confidence applying genomic knowledge to evaluate her decision, and ability to interpret provided genetic risk information (genetic literacy skills). Linear and logistic regressions tested mediating/moderating models of these factors in association with opinions regarding mastectomies. Confidence with genomics was associated with increased genetic literacy skills and increased media exposure, with a significant interaction between the two. Confidence was also associated with favoring mastectomies for women with BRCA mutations, mediating the relationship with media exposure. Respondents were more likely to form opinions about mastectomies if they had high genetic literacy skills. These findings suggest that having higher genetic literacy skills may increase the public's ability to form opinions about clinical applications of genomic discovery. However, repeated media exposure to high-profile stories may artificially inflate confidence among those with low genetic literacy. © 2016 S. Karger AG, Basel.

Evaluation of contrast media submitted to ionizing radiation

International Nuclear Information System (INIS)

Pinho, Katia Elisa Prus; Gewehr, Pedro Miguel; Soboll, Danyel Scheidegger; Silva, Caroline Werner Pereira da; Barison, Andersson; Tilly Junior, Joao Gilberto

2009-01-01

Objective: the purpose of the present study was to investigate the influence of ionizing radiation from x-rays and gamma rays on the molecular structure stability of several radiologic contrast media employed in diagnostic imaging by means of 1 H and 1 3C nuclear magnetic resonance spectroscopy. Materials and methods: eight different types of iodinated contrast media (three ionic and five non-ionic) were exposed to x-rays and gamma rays irradiation. Subsequently, the 1 H and 1 3C{ 1 H} nuclear magnetic resonance spectra of these contrast media were collected. Results: the 1 H and 1 3C{ 1 H} nuclear magnetic resonance spectra of both ionic and non-ionic contrast media irradiated by x-rays or gamma rays demonstrated the absence of any alteration of the contrast media chemical composition. Conclusion: there is no problem in keeping contrast media inside examination rooms or close to radiological equipment. It is important to mention that, during the tests, the samples were directly irradiated, while in a radiology examination room, the irradiation is not direct and, therefore, radiation levels in these cases are much lower than those employed in the present study. (author)

MEDIA AND WOMEN HEALTH IN INDIA

OpenAIRE

K. Parkavi

2017-01-01

Health Communication is an important domain in communication arena aims at disseminating health messages to the public. In this study the role of media in giving health information to women is analysed. The portrayal of women in media, the impact it creates on the minds of women, both urban and rural background is scrutinised separately. The responsibility of media in the rural health of women is critically studied and media’s role in Idealising body images in the mind of urban women is also ...

Social Media for the Dissemination of Cochrane Child Health Evidence: Evaluation Study.

Science.gov (United States)

Dyson, Michele P; Newton, Amanda S; Shave, Kassi; Featherstone, Robin M; Thomson, Denise; Wingert, Aireen; Fernandes, Ricardo M; Hartling, Lisa

2017-09-01

Health care providers value ready access to reliable synthesized information to support point-of-care decision making. Web-based communities, facilitated by the adoption of social media tools such as Facebook, Twitter, and YouTube, are increasingly being used for knowledge dissemination, bridging the gap between knowledge generation and synthesis and knowledge implementation. Our objective was to implement and evaluate a structured social media strategy, using multiple platforms, to disseminate Cochrane Child Health evidence to health care providers caring for children. Our social media strategy had three components: daily "tweets" using the Cochrane Child Health Twitter account, weekly WordPress blog posts, and a monthly journal club on Twitter ("tweet chat"). Each tweet, blog, and journal club shared Cochrane evidence on a child health topic. We evaluated the strategy through (1) Twitter and blog site analytics, (2) traceable link (Bitly) statistics, (3) Altmetric.com scores for promoted evidence, and (4) participant feedback. We also tracked the resources required to write the blog, tweet content, and manage the strategy. The 22-week social media strategy ran between November 2014 and April 2015. We created 25 blog posts, sent 585 tweets, and hosted 3 tweet chats. Monthly blog visits and views and Twitter account followers increased over time. During the study period, the blog received 2555 visitors and 3967 page views from a geographically diverse audience of health care providers, academics, and health care organizations. In total, 183 traceable Bitly links received 3463 clicks, and the Twitter account gained 469 new followers. The most visited and viewed blog posts included gastrointestinal topics (lactose avoidance), research on respiratory conditions (honey for cough and treatments for asthma), and maternal newborn care (skin-to-skin contact). On Twitter, popular topics were related to public health (vaccination) and pain management. We collected Altmetric

Seeds of Cross-Media Production

DEFF Research Database (Denmark)

Bødker, Susanne; Petersen, Anja Bechmann

2007-01-01

We present an empirical study of an organization that has recently moved from traditional newspaper production towards cross-media production involving the integrated digital production of newspaper, television, radio and web-news. The paper focuses on the daily production rhythms of the media...... separately and of cross-media production. Since cross-media production is in the making, we study the instruments currently used for planning and coordination, and analyze them as seeds that will eventually make cross-media production happen. Time and timing are important in news production in general......, and our analyses focus on the rhythm of the daily planning, coordination and production processes. Specifically, we analyze the temporal coordination of the activities in and around the Superdesk – the current center of coordination of the news organization, and of the persons who work specifically...

Social Media Across the Organization

DEFF Research Database (Denmark)

Kampf, Constance Elizabeth; Mohammadreza, Marjan

2016-01-01

Social Media studies tend to focus on either internal (Friedl & Verčič, 2011; Huang et al, 2013) or external communication (Briones et al, 2011; Hanna et al, 2011; Saschi, 2012; Byrd, 2012; Kilgour et al, 2015) , rather than addressing social media across the organization. This is problematic...... because of the diversity in perspectives about how social media should be deployed among competing department perspectives in an organization are generally not explicitly considered when internal and external communication are dealt with separately. These diverse perspectives lead to tensions between...... differing needs and practices across the organization that affect the understanding of social media value and use, as well as how social media fits with overall communication strategy planning. To address this issue, we have conceptualized the “Online Reputation Chain” as a metaphor for understanding social...

Implementation of Text-Messaging and Social Media Strategies in a Multilevel Childhood Obesity Prevention Intervention: Process Evaluation Results.

Science.gov (United States)

Loh, Ivory H; Schwendler, Teresa; Trude, Angela C B; Anderson Steeves, Elizabeth T; Cheskin, Lawrence J; Lange, Sarah; Gittelsohn, Joel

2018-01-01

Social media and text messaging show promise as public health interventions, but little evaluation of implementation exists. The B'more Healthy Communities for Kids (BHCK) was a multilevel, multicomponent (wholesalers, food stores, recreation centers) childhood obesity prevention trial that included social media and text-messaging components. The BHCK was implemented in 28 low-income areas of Baltimore City, Maryland, in 2 waves. The texting intervention targeted 241 low-income African American caregivers (of 283), who received 3 texts/week reinforcing key messages, providing nutrition information, and weekly goals. Regular posting on social media platforms (Facebook, Instagram, Twitter) targeted community members and local stakeholders. High implementation standards were set a priori (57 for social media, 11 for texting), with low implementation defined as social media implementation improved from low-moderate to high reach, dose delivered, and fidelity. Text messaging increased from moderate to high in reach and dose delivered, fidelity decreased from high to moderate. Data were used to monitor and revise the BHCK intervention throughout implementation. Our model for evaluating text messaging-based and social media-based interventions may be applicable to other settings.

Evaluation of two modified culture media for Leishmania infantum cultivation versus different culture media.

Science.gov (United States)

Castelli, Germano; Galante, Antonella; Lo Verde, Vincenza; Migliazzo, Antonella; Reale, Stefano; Lupo, Tiziana; Piazza, Maria; Vitale, Fabrizio; Bruno, Federica

2014-04-01

The aim of this study is to improve the cultivation of Leishmania promastigotes without the use of common, semisolid culture media such as Evans' modified Tobie's medium (EMTM), liquid RPMI 1640, and Peptone-yeast extract medium (P-Y). Although EMTM medium permits the growth of a high number of parasites, it is technically difficult to prepare as it requires the use of fresh rabbit blood from animals bred on farms, while RPMI 1640 and P-Y show lower growth rates than the EMTM. There is, therefore, a need to develop new blood-free and time-saving culture systems. The aim of this paper is to propose new modified microbiological media, named RPMI-PY and Tobie-PY, to isolate Leishmania and cultivate parasites for research and diagnostic purposes. This study compares classic culture media to the new media, RPMI-PY and Tobie-PY, and demonstrates that the new media have superior performance in terms of time and parasitic load. The growth rate of the parasite was significantly higher at 24, 48, and 72 hr cultivation, based on counts using Bürker's chambers, when compared to classic media. This study was carried out at the National References Centre for Leishmaniasis (C.Re.Na.L.) where the isolation procedures are conducted daily from a number of different biological matrices.

ESTEEM: A Novel Framework for Qualitatively Evaluating and Visualizing Spatiotemporal Embeddings in Social Media

Energy Technology Data Exchange (ETDEWEB)

Arendt, Dustin L.; Volkova, Svitlana

2017-07-30

Analyzing and visualizing large amounts of social media communications and contrasting short-term conversation changes over time and geo-locations is extremely important for commercial and government applications. Earlier approaches for large-scale text stream summarization used dynamic topic models and trending words. Instead, we rely on text embeddings – low-dimensional word representations in a continuous vector space where similar words are embedded nearby each other. This paper presents ESTEEM,1 a novel tool for visualizing and evaluating spatiotemporal embeddings learned from streaming social media texts. Our tool allows users to monitor and analyze query words and their closest neighbors with an interactive interface. We used state-of- the-art techniques to learn embeddings and developed a visualization to represent dynamically changing relations between words in social media over time and other dimensions. This is the first interactive visualization of streaming text representations learned from social media texts that also allows users to contrast differences across multiple dimensions of the data.

Best Practices for Suicide Prevention Messaging and Evaluating California's "Know the Signs" Media Campaign.

Science.gov (United States)

Acosta, Joie; Ramchand, Rajeev; Becker, Amariah

2017-09-01

Although communication is a key component of US strategies to prevent suicide and there are a number of marketing campaigns promoting messages that suicide is a preventable public health problem, there has been little evaluation of these campaigns. The study describes the development of a checklist of best practices for suicide prevention communication campaigns and the use of the checklist to evaluate California's investment in "Know the Signs" (KTS-M), a suicide prevention mass media campaign. We conducted a literature review and solicited expert feedback to identify best practices and then used the RAND/UCLA appropriateness method to assess whether KTS-M was consistent with the identified best practices. Overall, experts agreed that KTS-M adhered to most of the 46 checklist items and suggested that the campaign was among the best suicide prevention media campaigns they had observed. The checklist was developed through expert input and literature review and focuses only on media campaigns. Given the nascent state of the evidence about what makes an effective suicide prevention message and the growing number of campaigns, the checklist of best practices reflects one way of promoting quality in this evolving field. The consistency between the experts' comments and their ratings of KTS-M suggests that the checklist may provide important guidance to inform the development of future campaigns and the evaluation of ongoing campaigns.

Catalyst functionalized buffer sorbent pebbles for rapid separation of carbon dioxide from gas mixtures

Energy Technology Data Exchange (ETDEWEB)

Aines, Roger D

2015-03-31

A method for separating CO.sub.2 from gas mixtures uses a slurried media impregnated with buffer compounds and coating the solid media with a catalyst or enzyme that promotes the transformation of CO.sub.2 to carbonic acid. Buffer sorbent pebbles with a catalyst or enzyme coating are provided for rapid separation of CO.sub.2 from gas mixtures.

Catalyst functionalized buffer sorbent pebbles for rapid separation of carbon dioxide from gas mixtures

Science.gov (United States)

Aines, Roger D.

2013-03-12

A method for separating CO.sub.2 from gas mixtures uses a slurried media impregnated with buffer compounds and coating the solid media with a catalyst or enzyme that promotes the transformation of CO.sub.2 to carbonic acid. Buffer sorbent pebbles with a catalyst or enzyme coating are provided for rapid separation of CO.sub.2 from gas mixtures.

Comparing the Cost-Effectiveness of Campaigns Delivered via Various Combinations of Television and Online Media.

Science.gov (United States)

Allom, Vanessa; Jongenelis, Michelle; Slevin, Terry; Keightley, Stacey; Phillips, Fiona; Beasley, Sarah; Pettigrew, Simone

2018-01-01

Reflecting the increasing prevalence of online media, many mass media health campaigns are now delivered using both television (TV) and online media formats. The aim of this study was to evaluate a smoking cessation mass media campaign according to the cost-effectiveness of the various combinations of TV and online media formats to inform future media buying decisions. A quasi-experimental interrupted time series approach was employed. The campaign was delivered in seven 1-week bursts using TV, online video (OV), or online display (OD) (e.g., banner ads) formats in isolation and in various combinations over a 13-week period. Campaign bursts were separated by "off-weeks" in which no campaign materials were delivered. Assessed outcomes were the number of campaign response "events" recorded (campaign web page views, calls to a smoking cessation telephone service, and registrations for smoking cessation services). The cost-effectiveness of each individual and combined media format condition in terms of these outcome variables was calculated using attributed production and broadcasting costs. Overall, OD alone was found to be the most cost-effective means of achieving the nominated campaign outcomes, followed by a combination of OV and OD and a combination of TV and OV. The use of TV in isolation was the least cost-effective. The results of this evaluation indicate that online media constitute a promising means of enhancing the cost-effectiveness of smoking cessation campaigns. Future research assessing a broader range of outcomes, especially smoking cessation, is needed to provide a more comprehensive account of the cost-effectiveness of various campaign media.

Subjective Evaluation of Media Content as a Moderator of Media Effects on European Identity: Mere Exposure and the Hostile Media Phenomenon

Directory of Open Access Journals (Sweden)

Waqas Ejaz

2017-05-01

Full Text Available This paper posits that the concept of European identity is an important indicator of the legitimacy of the European Union (EU. It further assumes that the exposure to EU related media content can influence the feeling of European identity. In order to verify this assumption, we combined the mere-exposure-theory and the hostile media phenomenon. We assume that these theoretical concepts could help to understand the influence of media on people’s levels of attachment to the EU. Regression analyses are performed on secondary data that were collected in a Eurobarometer survey in 2013. Our findings revealed that media exposure affected the respondents’ identification with Europe, as well as the modifications of this effect based on their assessments of EU media coverage. The results of the current study not only validate assumptions about the mere-exposure effects on identity but also confirm the theoretical assumption that perceived hostility reduces such effects, whereas exposure to information that is perceived as neutral promotes the effects of media exposure on the feeling of European identity.

A Formative Evaluation of a Social Media Campaign to Reduce Adolescent Dating Violence

Science.gov (United States)

Lambert, Danielle N; Bishop, Lauren E; Guetig, Stephanie

2014-01-01

Background The Emory Jane Fonda Center implemented the Start Strong Atlanta social marketing campaign, “Keep It Strong ATL”, in 2007 to promote the development of healthy adolescent relationships and to foster the prevention of adolescent dating abuse among 11-14 year olds. Objective A formative evaluation was conducted to understand whether messages directed at the target audience were relevant to the program’s relationship promotion and violence prevention goals, and whether the “Web 2.0” social media channels of communication (Facebook, Twitter, YouTube, Flickr, Tumblr, and Pinterest) were reaching the intended audience. Methods Mixed methodologies included qualitative interviews and a key informant focus group, a cross-sectional survey, and web analytics. Qualitative data were analyzed using constant comparative methodology informed by grounded theory. Descriptive statistics were generated from survey data, and web analytics provided user information and traffic patterns. Results Results indicated that the Keep It Strong ATL social marketing campaign was a valuable community resource that had potential for broader scope and greater reach. The evaluation team learned the importance of reaching adolescents through Web 2.0 platforms, and the need for message dissemination via peers. Survey results indicated that Facebook (ranked 6.5 out of 8) was the highest rated social media outlet overall, and exhibited greatest appeal and most frequent visits, yet analytics revealed that only 3.5% of “likes” were from the target audience. These results indicate that the social media campaign is reaching predominantly women (76.5% of viewership) who are outside of the target age range of 11-14 years. Conclusions While the social media campaign was successfully launched, the findings indicate the need for a more focused selection of communication channels, timing of media updates to maximize visibility, balancing message tone and delivery, and incorporating

Steel grinding media in production use

International Nuclear Information System (INIS)

Nass, D.E.

1975-01-01

This paper reviews the types of steel being used for grinding rods and balls by the mining industry in U. S. and Canada. Results of a Dec. 1973 grinding media survey of U. S. and Canadian mills are summarized. Common alloying elements (C, Mn, Cr, Mo, Cu, etc.) are discussed. Grinding balls and rods are discussed separately; wear tests using irradiated balls are described. Finally, defects in grinding media are discussed

Separation of tungsten and rhenium on alumina

Directory of Open Access Journals (Sweden)

MILOVAN SM. STOILJKOVIC

2004-09-01

Full Text Available The conditions for the efficient separation of tungsten(VI and rhenium (VII on alumina were established. The distribution coefficients Kd for tungstate and perrhenate anions, as well as the separation factors a (a = KdWO42-/Kd ReO4- were determined using hydrochloric or nitric acid as the aqueous media. A solution of sodium chloride in the pH range 2–6 was also examined. Under all the tested experimental conditions, alumina is a much better adsorbent for tungsten than for rhenium. The obtained results indicated that the best separation of these two elements is achieved when 0.01– 0.1 mol dm-3 HCl or 1.0 mol dm-3 HNO3 are used as the aqueous media. If NaCl is used as the aqueous phase, the best separation is achieved with 0.20 mol dm-3 NaCl, pH 4–6. Under these experimental conditions, the breakthrough and saturation capacities of alumina for tungsten at pH 4 are 17 and 26 mg W/g Al2O3, respectively. With increasing pH, these values decrease. Thus, at pH 6 they are only 4 and 13 mg W/g Al2O3, respectively.

Separation of DR synthesized Ti-Mg Alloy by dissolution of waste by-products in acid media

CSIR Research Space (South Africa)

Mushove, T

2010-06-01

Full Text Available Of DR Synthesized Ti-Mg Alloy By Dissolution Of Waste By-Products In Acid Media. The dissolution experiments were done in a Julabo SW23 waterbath shaker, with 300 ml flasks. Acid solution of predetermined molarity was charged into a flask and heated... of the diffraction peaks of Mg and TiO2. The reduction of TiO2 at 32hrs of milling was evaluated from Equation 6.2 to be 90.4% (4). Calculated proportions of products, and the respective masses from a 2g sample, are shown in Table 1. Constituent TiO2 Ti-Mg Mg...

An Evaluation of Media-Oriented Rate Selection Algorithm for Multimedia Transmission in MANETs

Directory of Open Access Journals (Sweden)

Guionnet Thomas

2005-01-01

Full Text Available We focus on the optimization of real-time multimedia transmission over 802.11-based ad hoc networks. In particular, we propose a simple and efficient cross-layer mechanism that considers both the channel conditions and characteristics of the media for dynamically selecting the transmission mode. This mechanism called media-oriented rate selection algorithm (MORSA targets loss-tolerant applications such as VoD that do not require full reliable transmission. We provide an evaluation of this mechanism for MANETs using simulations with NS and analyze the video quality obtained with a fine-grain scalable video encoder based on a motion-compensated spatiotemporal wavelet transform. Our results show that MORSA achieves up to 4 Mbps increase in throughput and that the routing overhead decreases significantly. Transmission of a sample video flow over an 802.11a wireless channel has been evaluated with MORSA. Important improvement is observed in throughput, latency, and jitter while keeping a good level of video quality.

Stereotypes in media and media literacy among young people

Directory of Open Access Journals (Sweden)

Đerić Ivana

2006-01-01

Full Text Available Young people, the most common consumers of media content, bear out the view that media shapes people’s lives. Therefore we must not underestimate the effect media exerts on young people’s values and behavioral patterns. Television is the medium which draws children and young people for the greatest part of their free time. Regardless whether television programs are described as positive or negative, whether they abound with stereotypes or not, it is important that young people develop a critical attitude towards them so that they may resist different forms of media manipulation. The paper discusses how stereotypes are generated and used by media and the manners in which stereotypical concepts affect young people’s attitudes. It highlights the importance of the development of media literacy which implies a critical attitude towards media images and discourses, the development of criteria for the selection and evaluation of information broadcast by media, the development of skills in interpreting and understanding stereotypical concepts and familiarity with alternative forms of media culture. The paper draws special attention to the issue of media education. The conclusion is that schools should offer media literacy as part of their curriculum and in it possible solutions to the problems discussed. .

Enriching Higher Education with Social Media: Development and Evaluation of a Social Media Toolkit

Science.gov (United States)

Gülbahar, Yasemin; Rapp, Christian; Kilis, Selcan; Sitnikova, Anna

2017-01-01

While ubiquitous in everyday use, in reality, social media usage within higher education teaching has expanded quite slowly. Analysis of social media usage of students and instructors for teaching, learning, and research purposes across four countries (Russia, Turkey, Germany, and Switzerland) showed that many higher education instructors actively…

The Living the Example Social Media Substance Use Prevention Program: A Pilot Evaluation

Science.gov (United States)

Andrade, Elizabeth; Goldmeer, Sandra; Smith, Michelle; Snider, Jeremy; Girardo, Gunilla

2017-01-01

Background Adolescent substance use rates in rural areas of the United States, such as upstate New York, have risen substantially in recent years, calling for new intervention approaches in response to this trend. The Mentor Foundation USA conducts the Living the Example (LTE) campaign to engage youth in prevention using an experiential approach. As part of LTE, youth create their own prevention messages following a training curriculum in techniques for effective messaging and then share them via social media. This paper reports on a pilot evaluation of the LTE program. Objective To conduct a pilot test of LTE in two rural high schools in upstate New York. We hypothesized that positive antidrug brand representations could be promoted using social media strategies to complement the Shattering the Myths (STM) in-person, event-based approach (hypothesis 1, H1), and that youth would respond positively and engage with prevention messages disseminated by their peers. We also hypothesized that exposure to the social media prevention messages would be associated with more positive substance use avoidance attitudes and beliefs, reductions in future use intentions, and decreased substance use at posttest (hypothesis 2, H2). Methods We adapted a previously published curriculum created by the authors that focuses on branding, messaging, and social media for prevention. The curriculum consisted of five, one-hour sessions. It was delivered to participating youth in five sequential weeks after school at the two high schools in late October and early November 2016. We designed a pre- and posttest pilot implementation study to evaluate the effects of LTE on student uptake of the intervention and short-term substance use and related outcomes. Working at two high schools in upstate New York, we conducted a pilot feasibility evaluation of LTE with 9th-grade students (ie, freshmen) at these high schools. We administered a 125-item questionnaire online to capture data on media use

An Evaluation of Two Hydrograph Separation Methods of Potential Use in Regional Water Quality Assessment

Energy Technology Data Exchange (ETDEWEB)

Huff, D.D.

1999-01-01

Streamflow data are more useful for evaluating hydrologic model results and studying water quality once baseflow and storm runoff have been separated. However, it is important to select an appropriate hydrograph separation method. They examined tow methods and evaluated their conceptual basis, ease of application, cost of data processing, and acceptability of results. they chose the quick flow hydrograph separation method, which is in use at the Coweeta Hydrologic Laboratory, because it gives acceptable results and is easy and inexpensive to use. For regional assessment, they anticipate that the Coweeta program will be useful as an aid in developing general quantitative relationships between changes in land use and the associated changes in surface runoff yield and water quality degradation.

Mass transfer modeling on the separation of tantalum and niobium from dilute hydrofluoric media through a hollow fiber supported liquid membrane

International Nuclear Information System (INIS)

Buachuang, Duenphen; Ramakul, Prakorn; Leepipatpiboon, Natchanun; Pancharoen, Ura

2011-01-01

Highlights: → Simultaneous separation of tantalum and niobium from the mixture solution. → An extraction through a hollow fiber supported liquid membrane (HFSLM). → The effect on tantalum removal found from Aliquat 336. → The mathematical model focusing on the extraction side of the liquid membrane system was presented. → The mass transfer coefficients of the aqueous feed (k i ) and the organic membrane phase (k m ) for the system were estimated as 1.19 x 10 -5 and 1.39 x 10 -7 cm/s, respectively. → Experimental data and theoretical values were found to be in good agreement when the concentration of Aliquat336 in the membrane phase was below 4% (v/v). - Abstract: The separation of a mixture of tantalum and niobium in dilute hydrofluoric media via hollow fiber supported liquid membrane (HFSLM) was examined. Quaternary ammonium salt (Aliquat336) diluted in kerosene was used as a carrier. The various effects on the transport and separation of tantalum and niobium were studied: concentration of hydrofluoric acid in the feed solution, concentration of the carrier (Aliquat336) in the membrane phase, types of stripping solutions (NaClO 4 , thiourea and HCl) and their concentration. The extraction of tantalum in the membrane phase from 0.3 M hydrofluoric acid (HF) by 3% (v/v) Aliquat336 was achieved by leaving niobium in the feed solution. Quantitative recovery of tantalum was achieved by 0.2 M NaClO 4 . Furthermore, a mathematical model focusing on the extraction side of the liquid membrane system was presented in order to predict the concentration of tantalum at different times. The mass transfer coefficients of the aqueous feed (k i ) and the organic membrane phase (k m ) were estimated as 1.19 x 10 -5 and 1.39 x 10 -7 cm/s, respectively. Therefore, the mass transfer limiting step is the diffusion of tantalum-Aliquat336 through the liquid membrane. Moreover, mass transfer modeling was performed and the validity of the developed model evaluated. Experimental

Mass transfer modeling on the separation of tantalum and niobium from dilute hydrofluoric media through a hollow fiber supported liquid membrane

Energy Technology Data Exchange (ETDEWEB)

Buachuang, Duenphen [Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330 (Thailand); Ramakul, Prakorn [Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom 73000 (Thailand); Leepipatpiboon, Natchanun [Chromatography and Separation Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Patumwan, Bangkok 10330 (Thailand); Pancharoen, Ura, E-mail: ura.p.@chula.ac.th [Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330 (Thailand)

2011-09-29

Highlights: > Simultaneous separation of tantalum and niobium from the mixture solution. > An extraction through a hollow fiber supported liquid membrane (HFSLM). > The effect on tantalum removal found from Aliquat 336. > The mathematical model focusing on the extraction side of the liquid membrane system was presented. > The mass transfer coefficients of the aqueous feed (k{sub i}) and the organic membrane phase (k{sub m}) for the system were estimated as 1.19 x 10{sup -5} and 1.39 x 10{sup -7} cm/s, respectively. > Experimental data and theoretical values were found to be in good agreement when the concentration of Aliquat336 in the membrane phase was below 4% (v/v). - Abstract: The separation of a mixture of tantalum and niobium in dilute hydrofluoric media via hollow fiber supported liquid membrane (HFSLM) was examined. Quaternary ammonium salt (Aliquat336) diluted in kerosene was used as a carrier. The various effects on the transport and separation of tantalum and niobium were studied: concentration of hydrofluoric acid in the feed solution, concentration of the carrier (Aliquat336) in the membrane phase, types of stripping solutions (NaClO{sub 4}, thiourea and HCl) and their concentration. The extraction of tantalum in the membrane phase from 0.3 M hydrofluoric acid (HF) by 3% (v/v) Aliquat336 was achieved by leaving niobium in the feed solution. Quantitative recovery of tantalum was achieved by 0.2 M NaClO{sub 4}. Furthermore, a mathematical model focusing on the extraction side of the liquid membrane system was presented in order to predict the concentration of tantalum at different times. The mass transfer coefficients of the aqueous feed (k{sub i}) and the organic membrane phase (k{sub m}) were estimated as 1.19 x 10{sup -5} and 1.39 x 10{sup -7} cm/s, respectively. Therefore, the mass transfer limiting step is the diffusion of tantalum-Aliquat336 through the liquid membrane. Moreover, mass transfer modeling was performed and the validity of the

Long-term evaluation of a Canadian back pain mass media campaign.

Science.gov (United States)

Suman, Arnela; Bostick, Geoffrey P; Schopflocher, Donald; Russell, Anthony S; Ferrari, Robert; Battié, Michele C; Hu, Richard; Buchbinder, Rachelle; Gross, Douglas P

2017-09-01

This paper evaluates the long-term impact of a Canadian mass media campaign on general public beliefs about staying active when experiencing low back pain (LBP). Changes in beliefs about staying active during an episode of LBP were studied using telephone and web-based surveys. Logistic regression analysis was used to investigate changes in beliefs over time and the effect of exposure to campaign messaging. The percentage of survey respondents agreeing that they should stay active through LBP increased annually from 58.9 to ~72.0%. Respondents reporting exposure to campaign messaging were statistically significantly more likely to agree with staying active than respondents who did not report exposure to campaign messaging (adjusted OR, 95% CI = 1.96, 1.73-2.21). The mass media campaign had continued impact on public LBP beliefs over the course of 7 years. Improvements over time were associated with exposure to campaign messaging.

THE IMPACT OF MASS MEDIA ON CHILDREN

Directory of Open Access Journals (Sweden)

Maria Katarzyna Grzegorzewska

2008-01-01

Full Text Available The 21th century from the standpoint of man is regarded as a time of domestication of new media technologies. During that era audiovisual media have displayed the traditional media. Written word has lost is place to television, video games, and in the Internet, whichare having a major impact on people of all ages including young children. The word “illusion” originates from the Latin word “illusio” which means to pretend, to elude. The media world has become independent in terms of the real word and started tolive according to its own rules. We have started to function in two separate realities: actual reality, and virtual media reality. For some people it is very hard to distinguish two types of realities, not to mention kids, which usually perceive media reality as entirely real, actual domain.

The evidence-based evaluation of the safety of contrast media in patients with diabetes mellitus

International Nuclear Information System (INIS)

Li Jixia; Huang Baosheng

2009-01-01

Contrast-induced nephropathy (CIN) has now been the third most common cause of acquired renal failure. Diabetes mellitus (DM), the type of contrast agent used and the intra-arterial route of administration are three important risk factors inducing CIN. The incidence rate of CIN is very high in patients with DM or renal insufficiency after iodinated contrast was administered. Unfortunately, it has not yet attracted physicians'and radiologists'sufficient attention. This paper aims to make an evidence-based evaluation of the safety and rephrotoxicity of various contrast agents when they are used in patients with DM. Usually, intravenous administration of contrast media will not cause permanent damage to the kidney in highrisk patients. Low-osmolarity contrast media is relatively safe for patients with DM only, while it takes much risk of CIN when low-osmolarity contrast media is used in patients with diabetic nephropathy or in patients of DM accompanied with renal insufficiency, for such patients, the iso-osmolarity contrast media, iodixanol, can be used. (authors)

Comparative evaluation of six chromogenic media for presumptive yeast identification.

Science.gov (United States)

Vecchione, Alessandra; Florio, Walter; Celandroni, Francesco; Barnini, Simona; Lupetti, Antonella; Ghelardi, Emilia

2017-12-01

The present study was undertaken to evaluate the discrimination ability of six chromogenic media in presumptive yeast identification. We analysed 108 clinical isolates and reference strains belonging to eight different species: Candida albicans , Candida dubliniensis , Candida tropicalis , Candida krusei , Candida glabrata , Candida parapsilosis , Candida lusitaniae and Trichosporon mucoides . C. albicans , C. tropicalis and C. krusei could be distinguished from one another in all the tested chromogenic media, as predicted by the manufacturers. In addition, C. albicans could be distinguished from C. dubliniensis on BBL CHROMagar Candida, Kima CHROMagar Candida and Brilliance Candida, and C. parapsilosis could be identified on CHROMATIC Candida agar, CHROMOGENIC Candida agar, and Brilliance Candida agar. Brilliance Candida provided the widest discrimination ability, being able to discriminate five out of the seven Candida species tested. Interestingly, C. tropicalis and C. krusei could be already distinguished from each other after 24 hours of incubation. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

Comparing the Cost-Effectiveness of Campaigns Delivered via Various Combinations of Television and Online Media

Directory of Open Access Journals (Sweden)

Vanessa Allom

2018-03-01

Full Text Available BackgroundReflecting the increasing prevalence of online media, many mass media health campaigns are now delivered using both television (TV and online media formats. The aim of this study was to evaluate a smoking cessation mass media campaign according to the cost-effectiveness of the various combinations of TV and online media formats to inform future media buying decisions.MethodsA quasi-experimental interrupted time series approach was employed. The campaign was delivered in seven 1-week bursts using TV, online video (OV, or online display (OD (e.g., banner ads formats in isolation and in various combinations over a 13-week period. Campaign bursts were separated by “off-weeks” in which no campaign materials were delivered. Assessed outcomes were the number of campaign response “events” recorded (campaign web page views, calls to a smoking cessation telephone service, and registrations for smoking cessation services. The cost-effectiveness of each individual and combined media format condition in terms of these outcome variables was calculated using attributed production and broadcasting costs.ResultsOverall, OD alone was found to be the most cost-effective means of achieving the nominated campaign outcomes, followed by a combination of OV and OD and a combination of TV and OV. The use of TV in isolation was the least cost-effective.ConclusionThe results of this evaluation indicate that online media constitute a promising means of enhancing the cost-effectiveness of smoking cessation campaigns. Future research assessing a broader range of outcomes, especially smoking cessation, is needed to provide a more comprehensive account of the cost-effectiveness of various campaign media.

Indigenous development and performance evaluation of BARC aerodynamic size separator (BASS)

CERN Document Server

Singh, S; Khan, A; Mayya, Y S; Narayanan, K P; Purwar, R C; Sapra, B K; Sunny, F

2002-01-01

Commercially available cascade impactors, commonly used for aerodynamic size separation of aerosol particles, are based on the principle of inertial impaction. As of now, these instruments are imported at a cost of several lakhs of rupees; hence an effort has been made to develop an aerodynamic particle sizer indigenously in BARC. This unit, referred to as BARC Aerodynamic Size Separator (BASS), separates aerosols into seven size classes ranging from 0.53 mu m to 10 mu m and operates at a flow rate of 45 Ipm. Intercomparison studies between the standard Andersen Mark-II (Grasbey Andersen Inc.) impactor and BASS using nebulizer generated aerosols have consistently shown excellent performance by BASS in all respects. In particular, BASS yielded the parameters of polydisperse aerosols quite accurately. Experiments to evaluate the individual stage cut-off diameters show that these are within 8% of their designed value for all stages except the higher two stages which indicate about 30% lower values than the desig...

Sizing Up Social Media

Science.gov (United States)

Pearson, Jerold

2010-01-01

Most people are aware of the increasing importance of social media to institutional advancement, and many colleges and universities have started investing resources in these media. The next step is to measure the impact of social media on the institution and evaluate the success of one's efforts. Every advancement leader should understand how…

Extraction and separation of molybdenum and vanadium from acidic and alkaline media using tertiary and quaternary amines

International Nuclear Information System (INIS)

Stas, J.; Dahdouh, A.; Rizkallah, I.

2010-01-01

phases (TDA and QA) with several stripping agents (H 2 SO 4 , (NH 4 ) 2 SO 4 , (NH 4 ) 2 CO 3 , Na 2 CO 3 , NaOH) has been studied and it was found that NaOH is the best stripping media for both extractants but with more difficulties for the quaternary amine methyl trioctyl ammonium chloride. Finally, it has been suggested two flowsheets for vanadium separation from molybdenum using TDA and QA. (author)

Separation of lanthanides through hydroxyapatite; Separacion de lantanidos mediante hidroxiapatita

Energy Technology Data Exchange (ETDEWEB)

Garcia M, F.G

2006-07-01

With the objective of obtaining from an independent way to each one of the lanthanides {sup 151} Pm, {sup 161} Tb, {sup 166} Ho and {sup 177} Lu free of carrier and with high specific activities starting from the indirect irradiation via, it intends in this work to determine the viability of separation of the couples Nd/Pm, Dy/Ho, Gd/Tb and Yb/Lu, by means of ion exchange column chromatography, using hydroxyapatite (HAp) and fluorite like absorbent material in complexing media. It is important to mention that have registered separation studies among lanthanides of the heavy group with those of the slight group, using the same mass and, in comparison with this work, quantities different from the father were used and of the son, also, that the separation studies were carried out among neighboring lanthanides. In this investigation, it was determined the effect that its have the complexing media: KSCN, sodium tartrate, sodium citrate, EDTA and aluminon, their pH and concentration, in the adsorption of the lanthanides in both minerals, in order to determine the chromatographic conditions for separation of the couples Nd/Pm, Dy/Ho, Gd/Tb and Yb/Lu. The work consists of five chapters, in the first one they are presented a theoretical introduction of the characteristics more important of the lanthanides, the hydroxyapatite and the fluorite; in the second, it is deepened in the ion exchange, as well as the two techniques (XRD and High Vacuum Electron Microscopy) to make the characterization of LnCI{sub 3} (Ln = Nd, Gd, Dy or Yb) synthesized. The third chapter, it describes the methodology continued in our experimental work; in the room, its are presented the obtained results of the static and dynamic method to determine the viability of separation of neighboring lanthanides; and finally, the five chapter shows the conclusions. In this study, it is concludes that the separation among neighboring lanthanides cannot be carried out in the minerals and used media; because

Learning Through Media; An IMC Handbook for Chelmsford Teachers.

Science.gov (United States)

Morrow, James; Wallace, Daniel

This handbook is designed to provide basic information that is necessary to use the Chelmsford School System's Instructional Media Center (IMC). It defines six different media (print, sound, television, photography, movies and design) and suggests a series of separate classroom production activities in each. An emphasis is given to the ways in…

Evaluation of enrichment by centrifugal separation: the future of the centrifugal-separation method

International Nuclear Information System (INIS)

Kanagawa, A.

A gas centrifuge plant for uranium enrichment is considered from the point of view of economic competition with other methods. Characteristics of the method are presented including: energy efficiency, the cascade, the separation coefficient, the equilibrium separation process, and capability as centrifugal pump. The structure of an individual gas centrifuge separator is described including the rotating cylinder, mechanisms for gas injection and extraction, mechanisms for counter-streaming of gas, the axle holder mechanism, the gas sealing mechanism, and the driving mechanism. (U.S.)

Evaluation of the Impact of Media Marketing Strategies on Continuing Education Enrollments. AIR Forum 1982 Paper.

Science.gov (United States)

Campbell, Jill F.; Spiro, Louis M.

The impact of media marketing strategies on continuing education enrollment at the State University of New York College at Brockport (SUNY-CB), was evaluated. The evaluation of advertising impacts used advertising records of SUNY-CB and other area colleges and a telephone questionnaire instrument. A stratified, random countywide sample, in…

Factors associated with online media attention to research: a cohort study of articles evaluating cancer treatments.

Science.gov (United States)

Haneef, Romana; Ravaud, Philippe; Baron, Gabriel; Ghosn, Lina; Boutron, Isabelle

2017-01-01

New metrics have been developed to assess the impact of research and provide an indication of online media attention and data dissemination. We aimed to describe online media attention of articles evaluating cancer treatments and identify the factors associated with high online media attention. We systematically searched MEDLINE via PubMed on March 1, 2015 for articles published during the first 6 months of 2014 in oncology and medical journals with a diverse range of impact factors, from 3.9 to 54.4, and selected a sample of articles evaluating a cancer treatment regardless of study design. Altmetric Explorer was used to identify online media attention of selected articles. The primary outcome was media attention an article received online as measured by Altmetric score (i.e., number of mentions in online news outlets, science blogs and social media). Regression analysis was performed to investigate the factors associated with high media attention, and regression coefficients represent the logarithm of ratio of mean (RoM) values of Altmetric score per unit change in the covariate. Among 792 articles, 218 (27.5%) received no online media attention (Altmetric score = 0). The median [Q1-Q3] Altmetric score was 2.0 [0.0-8.0], range 0.0-428.0. On multivariate analysis, factors associated with high Altmetric score were presence of a press release (RoM = 10.14, 95%CI [4.91-20.96]), open access to the article (RoM = 1.48, 95%CI [1.02-2.16]), and journal impact factor (RoM = 1.10, 95%CI [1.07-1.12]. As compared with observational studies, systematic reviews were not associated with high Altmetric score (RoM = 1.46, 95%CI [0.74-2.86]; P  = 0.27), nor were RCTs (RoM = 0.65, 95%CI [0.41-1.02]; P  = 0.059) and phase I/II non-RCTs (RoM = 0.58, 95%CI [0.33-1.05]; P  = 0.07). The articles with abstract conclusions favouring study treatments were not associated with high Altmetric score (RoM = 0.97, 95%CI [0.60-1.58]; P  = 0

Students' use of social media during the travel process

OpenAIRE

Nemec Rudež, Helena; Vodeb, Ksenija

2015-01-01

Purpose – The purpose of the study is to explore how students as an important travel segment are involved in social media during the travel process and explore the underlying dimensions of social media use by students during the travel process. Design/methodology/approach – The quantitative research focuses on the students’ use of social media in the three phrases of the travel process – before travel, during travel and after travel separately. Survey instrument was a structured questionna...

A Systematic Search and Review of Adult-Targeted Overweight and Obesity Prevention Mass Media Campaigns and Their Evaluation: 2000-2017.

Science.gov (United States)

Kite, James; Grunseit, Anne; Bohn-Goldbaum, Erika; Bellew, Bill; Carroll, Tom; Bauman, Adrian

2018-01-01

Mass media campaigns are a commonly used strategy in public health. However, no review has assessed whether the design and evaluation of overweight and obesity campaigns meets best practice recommendations. This study aimed to fill this gap. We systematically searched five databases for peer-reviewed articles describing adult-targeted obesity mass media campaigns published between 2000 and 2017, complemented by reference list searches and contact with authors and agencies responsible for the campaigns. We extracted data on campaign design, implementation, and evaluation from eligible publications and conducted a qualitative review of 29 publications reporting on 14 campaigns. We found a need for formative research with target audiences to ensure campaigns focus on the most salient issues. Further, we noted that most campaigns targeted individual behaviors, despite calls for campaigns to also focus upstream and to address social determinants of obesity. Television was the dominant communication channel but, with the rapid advance of digital media, evaluation of other channels, such as social media, is increasingly important. Finally, although evaluation methods varied in quality, the evidence suggests that campaigns can have an impact on intermediate outcomes, such as knowledge and attitudes. However, evidence is still limited as to whether campaigns can influence behavior change.

Pilot evaluation of a media literacy program for tobacco prevention targeting early adolescents shows mixed results.

Science.gov (United States)

Kaestle, Christine E; Chen, Yvonnes; Estabrooks, Paul A; Zoellner, Jamie; Bigby, Brandon

2013-01-01

The purpose of this pilot study was to assess the impact of media literacy for tobacco prevention for youth delivered through a community site. A randomized pretest-posttest evaluation design with matched-contact treatment and control conditions. The pilot study was delivered through the YMCA in a lower-income suburban and rural area of Southwest Virginia, a region long tied, both economically and culturally, to the tobacco industry. Children ages 8 to 14 (76% white, 58% female) participated in the study (n = 38). The intervention was an antismoking media literacy program (five 1-hour lessons) compared with a matched-contact creative writing control program. General media literacy, three domains of tobacco-specific media literacy ("authors and audiences," "messages and meanings," and "representation and reality"), tobacco attitudes, and future expectations were assessed. Multiple regression modeling assessed the impact of the intervention, controlling for pretest measures, age, and sex. General media literacy and tobacco-specific "authors and audiences" media literacy improved significantly for treatment compared with control (p literacy measures and for tobacco attitudes were not significant. Future expectations of smoking increased significantly for treatment participants ages 10 and younger (p literacy are accompanied by an increase in future expectations to smoke for younger children.

Extraction and separation of U(VI and Th(IV from hydrobromic acid media using Cyanex-923 extractant

Directory of Open Access Journals (Sweden)

Ghag Snehal M.

2010-01-01

Full Text Available A systematic study of the solvent extraction of uranium(VI and thorium(IV from hydrobromic acid media was performed using the neutral phosphine oxide extractant Cyanex-923 in toluene. These metal ions were found to be quantitatively extracted with Cyanex-923 in toluene in the acidity range 5x10-5-1x10-4 M and 5x10-5-5x10-3 M, respectively, and they are stripped from the organic phase with 7.0 M HClO4 and 2.0- 4.0 M HCl, respectively. The effect of the equilibrium period, diluents, diverse ions and stripping agent on the extraction of U(VI and Th(IV was studied. The stoichiometry of the extracted species of these metal ions was determined based on the slope analysis method. The extraction reactions proceed by solvation and their probable extracted species found in the organic phase were UO2Br2•2Cyanex-923 and ThBr4•2Cyanex-923. Based on these results, a sequential procedure for their separation from each other was developed.

Fast algorithms for evaluating the stress field of dislocation lines in anisotropic elastic media

Science.gov (United States)

Chen, C.; Aubry, S.; Oppelstrup, T.; Arsenlis, A.; Darve, E.

2018-06-01

In dislocation dynamics (DD) simulations, the most computationally intensive step is the evaluation of the elastic interaction forces among dislocation ensembles. Because the pair-wise interaction between dislocations is long-range, this force calculation step can be significantly accelerated by the fast multipole method (FMM). We implemented and compared four different methods in isotropic and anisotropic elastic media: one based on the Taylor series expansion (Taylor FMM), one based on the spherical harmonics expansion (Spherical FMM), one kernel-independent method based on the Chebyshev interpolation (Chebyshev FMM), and a new kernel-independent method that we call the Lagrange FMM. The Taylor FMM is an existing method, used in ParaDiS, one of the most popular DD simulation softwares. The Spherical FMM employs a more compact multipole representation than the Taylor FMM does and is thus more efficient. However, both the Taylor FMM and the Spherical FMM are difficult to derive in anisotropic elastic media because the interaction force is complex and has no closed analytical formula. The Chebyshev FMM requires only being able to evaluate the interaction between dislocations and thus can be applied easily in anisotropic elastic media. But it has a relatively large memory footprint, which limits its usage. The Lagrange FMM was designed to be a memory-efficient black-box method. Various numerical experiments are presented to demonstrate the convergence and the scalability of the four methods.

Solid-liquid separation in the mining industry

CERN Document Server

Concha A , Fernando

2014-01-01

This book covers virtually all of the engineering science and technological aspects of separating water from particulate solids in the mining industry. It starts with an introduction to the field of mineral processing and the importance of water in mineral concentrators. The consumption of water in the various stages of concentration is discussed, as is the necessity of recovering the majority of that water for recycling. The book presents the fundamentals under which processes of solid-liquid separation are studied, approaching mixtures of discrete finely divided solid particles in water as a basis for dealing with sedimentation in particulate systems. Suspensions, treated as continuous media, provide the basis of sedimentation, flows through porous media and filtration. The book also considers particle aggregations, and thickening is analyzed in depth. Lastly, two chapters cover the fundamentals and application of rheology and the transport of suspensions.  This work is suitable for researchers and profess...

Boundaries of the Realizability Region of Membrane Separation Processes

Science.gov (United States)

Tsirlin, A. M.; Akhrenemkov, A. A.

2018-01-01

The region of realizability of membrane separation systems having a constant total membrane area has been determined for a definite output of a final product at a definite composition of a mixture flow. The law of change in the pressure in the mixture, corresponding to the minimum energy required for its separation, was concretized for media close in properties to ideal gases and solutions.

Educational Potential of New Media

Directory of Open Access Journals (Sweden)

Maria Yu. Kazak

2017-11-01

Full Text Available Digitalization of the mass media, which has radically changed the information environment, creates new opportunities for self-education and upgrowth of the audience. The paper defines the communicative and cultural status of new media, characterizes the socio-cultural and technological aspects of their dynamics; substantiates the necessity of elaborating mechanisms for systematization of heterogeneous information flows and elaborating criteria for their evaluation in the era of globalization of the media sphere, what implies a qualitatively different level of media competence of the audience, provided with such factors as media education, media coverage, media criticism. The definition of concepts "media competence", "media enlightenment", "media education", "media criticism" is given and their functional areas are delineated. Social networks are considered as an important tool for media enlightenment which provides significant opportunities for promoting cultural achievements in the new media environment.

The non-Newtonian heat and mass transport of He 2 in porous media used for vapor-liquid phase separation. Ph.D. Thesis

Science.gov (United States)

Yuan, S. W. K.

1985-01-01

This investigation of vapor-liquid phase separation (VLPS) of He 2 is related to long-term storage of cryogenic liquid. The VLPS system utilizes porous plugs in order to generate thermomechanical (thermo-osmotic) force which in turn prevents liquid from flowing out of the cryo-vessel (e.g., Infrared Astronomical Satellite). An apparatus was built and VLPS data were collected for a 2 and a 10 micrometer sintered stainless steel plug and a 5 to 15 micrometer sintered bronze plug. The VLPS data obtained at high temperature were in the nonlinear turbulent regime. At low temperature, the Stokes regime was approached. A turbulent flow model was developed, which provides a phenomenological description of the VLPS data. According to the model, most of the phase separation data are in the turbulent regime. The model is based on concepts of the Gorter-Mellink transport involving the mutual friction known from the zero net mass flow (ZNMF) studies. The latter had to be modified to obtain agreement with the present experimental VLPS evidence. In contrast to the well-known ZNMF mode, the VLPS results require a geometry dependent constant (Gorter-Mellink constant). A theoretical interpretation of the phenomenological equation for the VLPS data obtained, is based on modelling of the dynamics of quantized vortices proposed by Vinen. In extending Vinen's model to the VLPS transport of He 2 in porous media, a correlation between the K*(GM) and K(p) was obtained which permits an interpretation of the present findings. As K(p) is crucial, various methods were introduced to measure the permeability of the porous media at low temperatures. Good agreement was found between the room temperature and the low temperature K(p)-value of the plugs.

Pure Quasi-P-wave calculation in transversely isotropic media using a hybrid method

KAUST Repository

Wu, Zedong

2018-04-12

The acoustic approximation for anisotropic media is widely used in current industry imaging and inversion algorithms mainly because P-waves constitute the majority of the energy recorded in seismic exploration. The resulting acoustic formulas tend to be simpler, resulting in more efficient implementations, and depend on fewer medium parameters. However, conventional solutions of the acoustic wave equation with higher-order derivatives suffer from shear wave artifacts. Thus, we derive a new acoustic wave equation for wave propagation in transversely isotropic (TI) media, which is based on a partially separable approximation of the dispersion relation for TI media and free of shear wave artifacts. Even though our resulting equation is not a partial differential equation, it is still a linear equation. Thus, we propose to implement this equation efficiently by combining the finite difference approximation with spectral evaluation of the space-independent parts. The resulting algorithm provides solutions without the constrain of ε ≥ δ. Numerical tests demonstrate the effectiveness of the approach.

Pure Quasi-P-wave calculation in transversely isotropic media using a hybrid method

KAUST Repository

Wu, Zedong; Liu, Hongwei; Alkhalifah, Tariq Ali

2018-01-01

The acoustic approximation for anisotropic media is widely used in current industry imaging and inversion algorithms mainly because P-waves constitute the majority of the energy recorded in seismic exploration. The resulting acoustic formulas tend to be simpler, resulting in more efficient implementations, and depend on fewer medium parameters. However, conventional solutions of the acoustic wave equation with higher-order derivatives suffer from shear wave artifacts. Thus, we derive a new acoustic wave equation for wave propagation in transversely isotropic (TI) media, which is based on a partially separable approximation of the dispersion relation for TI media and free of shear wave artifacts. Even though our resulting equation is not a partial differential equation, it is still a linear equation. Thus, we propose to implement this equation efficiently by combining the finite difference approximation with spectral evaluation of the space-independent parts. The resulting algorithm provides solutions without the constrain of ε ≥ δ. Numerical tests demonstrate the effectiveness of the approach.

Evaluating Trade Areas Using Social Media Data with a Calibrated Huff Model

Directory of Open Access Journals (Sweden)

Yandong Wang

2016-07-01

Full Text Available Delimitating trade areas is a major business concern. Today, mobile communication technologies make it possible to use social media data for this purpose. Few studies however, have focused on methods to extract suitable samples from social media data for trade area delimitation. In our case study, we divided Beijing into regular grid cells and extracted activity centers for each social media user. Ten sample sets were obtained by selecting users based on the retail agglomerations they visited and aggregating user activity centers to each grid cell. We calculated distance and visitation frequency attributes for each user and each grid cell. The distance value of a grid cell is the average distance of user activity centers in this grid cell to a retail agglomeration. The visitation frequency of a grid cell refers to the average count of visits to retail agglomerations by user activity centers for a cell. The calculated attribute values of 10 sets were input into a Huff model and the delimitated trade areas were evaluated. Results show that sets obtained by aggregating user activity centers have a better delimitating effect than sets obtained without aggregation. Differences in the distribution and intensity of trade areas also became apparent.

The Living the Example Social Media Substance Use Prevention Program: A Pilot Evaluation.

Science.gov (United States)

Evans, William; Andrade, Elizabeth; Goldmeer, Sandra; Smith, Michelle; Snider, Jeremy; Girardo, Gunilla

2017-06-27

Adolescent substance use rates in rural areas of the United States, such as upstate New York, have risen substantially in recent years, calling for new intervention approaches in response to this trend. The Mentor Foundation USA conducts the Living the Example (LTE) campaign to engage youth in prevention using an experiential approach. As part of LTE, youth create their own prevention messages following a training curriculum in techniques for effective messaging and then share them via social media. This paper reports on a pilot evaluation of the LTE program. To conduct a pilot test of LTE in two rural high schools in upstate New York. We hypothesized that positive antidrug brand representations could be promoted using social media strategies to complement the Shattering the Myths (STM) in-person, event-based approach (hypothesis 1, H1), and that youth would respond positively and engage with prevention messages disseminated by their peers. We also hypothesized that exposure to the social media prevention messages would be associated with more positive substance use avoidance attitudes and beliefs, reductions in future use intentions, and decreased substance use at posttest (hypothesis 2, H2). We adapted a previously published curriculum created by the authors that focuses on branding, messaging, and social media for prevention. The curriculum consisted of five, one-hour sessions. It was delivered to participating youth in five sequential weeks after school at the two high schools in late October and early November 2016. We designed a pre- and posttest pilot implementation study to evaluate the effects of LTE on student uptake of the intervention and short-term substance use and related outcomes. Working at two high schools in upstate New York, we conducted a pilot feasibility evaluation of LTE with 9th-grade students (ie, freshmen) at these high schools. We administered a 125-item questionnaire online to capture data on media use; attitudes toward social media

Resistance of HEPA filter separator materials to humid air--hydrogen fluoride--fluorine environments

International Nuclear Information System (INIS)

Weber, C.W.; Petit, G.S.; Woodfin, S.B.

1977-01-01

The U. S. Energy Research and Development Administration (ERDA) is interested in the development of a high-efficiency particulate air (HEPA) filter that is resistant to such corrosive reagents as hydrogen fluoride (HF) and fluorine (F 2 ) in air environments of normal relative humidity (about 50% RH). Several types of separator materials are used in the fabrication of commercial filters. The basic types of separator materials are asbestos, Kraft paper, plastic, and aluminum. At the request of the ERDA Division of Operational Safety, the different types of separator materials have been evaluated for their resistance to corrosive attack by HF and F 2 . The separator materials were dynamically tested in the 4-stage multiunit tester located in the Oak Ridge Gaseous Diffusion Plant laboratories. This is the system previously used in the evaluation of the Herty Foundation filter paper samples. Concurrent with the testing of filter media for its resistance to HF and F 2 , another component of the completed filter, the separator, was tested. All samples were exposed to a constant air flow (50% RH) of 32 liters/min, at 100 0 F, containing 900 ppM HF and 300 ppM F 2 . Exposure periods varied from 2 to 1000 h; however, the longer exposures were made only on the stronger candidates. Test results show the plastic and aluminum separator materials to be superior to the other types in resistance to HF and F 2 . The asbestos separators disintegrated after a relatively short exposure time; the Kraft paper types were the next weakest. The Clear Plastic S was the best performer of the plastics tested

Separation of Nanoparticles in Aqueous Multiphase Systems through Centrifugation

KAUST Repository

Akbulut, Ozge; Mace, Charles R.; Martinez, Ramses V.; Kumar, Ashok A.; Nie, Zhihong; Patton, Matthew R.; Whitesides, George M.

2012-01-01

This paper demonstrates the use of aqueous multiphase systems (MuPSs) as media for rate-zonal centrifugation to separate nanoparticles of different shapes and sizes. The properties of MuPSs do not change with time or during centrifugation; this stability facilitates sample collection after separation. A three-phase system demonstrates the separation of the reaction products (nanorods, nanospheres, and large particles) of a synthesis of gold nanorods, and enriches the nanorods from 48 to 99% in less than ten minutes using a benchtop centrifuge. © 2012 American Chemical Society.

Separation of Nanoparticles in Aqueous Multiphase Systems through Centrifugation

KAUST Repository

Akbulut, Ozge

2012-08-08

This paper demonstrates the use of aqueous multiphase systems (MuPSs) as media for rate-zonal centrifugation to separate nanoparticles of different shapes and sizes. The properties of MuPSs do not change with time or during centrifugation; this stability facilitates sample collection after separation. A three-phase system demonstrates the separation of the reaction products (nanorods, nanospheres, and large particles) of a synthesis of gold nanorods, and enriches the nanorods from 48 to 99% in less than ten minutes using a benchtop centrifuge. © 2012 American Chemical Society.

Qualitative and quantitative evaluation of solvent systems for countercurrent separation.

Science.gov (United States)

Friesen, J Brent; Ahmed, Sana; Pauli, Guido F

2015-01-16

Rational solvent system selection for countercurrent chromatography and centrifugal partition chromatography technology (collectively known as countercurrent separation) studies continues to be a scientific challenge as the fundamental questions of comparing polarity range and selectivity within a solvent system family and between putative orthogonal solvent systems remain unanswered. The current emphasis on metabolomic investigations and analysis of complex mixtures necessitates the use of successive orthogonal countercurrent separation (CS) steps as part of complex fractionation protocols. Addressing the broad range of metabolite polarities demands development of new CS solvent systems with appropriate composition, polarity (π), selectivity (σ), and suitability. In this study, a mixture of twenty commercially available natural products, called the GUESSmix, was utilized to evaluate both solvent system polarity and selectively characteristics. Comparisons of GUESSmix analyte partition coefficient (K) values give rise to a measure of solvent system polarity range called the GUESSmix polarity index (GUPI). Solvatochromic dye and electrical permittivity measurements were also evaluated in quantitatively assessing solvent system polarity. The relative selectivity of solvent systems were evaluated with the GUESSmix by calculating the pairwise resolution (αip), the number of analytes found in the sweet spot (Nsw), and the pairwise resolution of those sweet spot analytes (αsw). The combination of these parameters allowed for both intra- and inter-family comparison of solvent system selectivity. Finally, 2-dimensional reciprocal shifted symmetry plots (ReSS(2)) were created to visually compare both the polarities and selectivities of solvent system pairs. This study helps to pave the way to the development of new solvent systems that are amenable to successive orthogonal CS protocols employed in metabolomic studies. Copyright © 2014 Elsevier B.V. All rights reserved.

Evaluation of chromogenic media and seminested PCR in the identification of Candida species

Science.gov (United States)

Daef, Enas; Moharram, Ahmed; Eldin, Salwa Seif; Elsherbiny, Nahla; Mohammed, Mona

2014-01-01

Identification of Candida cultured from various clinical specimens to the species level is increasingly necessary for clinical laboratories. Although sn PCR identifies the species within hours but its cost-effectiveness is to be considered. So there is always a need for media which help in the isolation and identification at the species level. The study aimed to evaluate the performance of different chromogenic media and to compare the effectiveness of the traditional phenotypic methods vs. seminested polymerase chain reaction (sn PCR) for identification of Candida species. One hundred and twenty seven Candida strains isolated from various clinical specimens were identified by conventional methods, four different chromogenic media and sn PCR. HiCrome Candida Differential and CHROMagar Candida media showed comparably high sensitivities and specificities in the identification of C. albicans, C. tropicalis, C. glabrata and C. krusei. CHROMagar Candida had an extra advantage of identifying all C. parapsilosis isolates. CHROMagar-Pal’s medium identified C. albicans, C. tropicalis and C. krusei with high sensitivities and specificities, but couldn’t identify C. glabrata or C. parapsilosis. It was the only medium that identified C. dubliniensis with a sensitivity and specificity of 100%. Biggy agar showed the least sensitivities and specificities. The overall concordance of the snPCR compared to the conventional tests including CHROMAgar Candida in the identification of Candida species was 97.5%. The use of CHROMAgar Candida medium is an easy and accurate method for presumptive identification of the most commonly encountered Candida spp. PMID:24948942

News Media Use, Informed Issue Evaluation, and South Koreans' Support for Genetically Modified Foods

Science.gov (United States)

Kim, Sei-Hill; Kim, Jeong-Nam; Choi, Doo-Hun; Jun, Sangil

2015-01-01

Analyzing survey data on the issue of genetically modified foods in South Korea, this study explores the role of news media in facilitating informed issue evaluation. Respondents who read a newspaper more often were more knowledgeable about the issue. Also, heavy newspaper readers were more able than light readers to hold "consistent"…

Frequency of otitis media based on otoendoscopic evaluation in preterm infants.

Science.gov (United States)

Coticchia, James; Shah, Priyanka; Sachdeva, Livjot; Kwong, Kelvin; Cortez, Josef M; Nation, Javan; Rudd, Tracy; Zidan, Marwan; Cepeda, Eugene; Gonik, Bernard

2014-10-01

This study was conducted to determine the frequency of otitis media in preterm neonates using otoendoscopy and tympanometry. Prospective study. Wayne State University, Hutzel Women's Hospital Neonatal Intensive Care Unit. Eighty-six preterm infants were included (gestational age otitis media. Kappa statistic and logistic regression were used for statistical analysis. Otoendoscopy was performed in 85 patients. The frequency of otoendoscopy-diagnosed otitis media was 72.9% (62/85). Tympanometry could be performed on 69.76% of the ears. There was 73.5% agreement between the findings of tympanometry and those of otoendoscopy. The association between the presence of otitis media and gestational age at birth was statistically significant. The lower the gestational age, the higher the frequency of otoendoscopy-diagnosed otitis media (P = .001). Otoendoscopically diagnosed otitis media is frequent in preterm neonates. There was agreement between the results of tympanometry and those of otoendoscopy. The frequency of otitis media increased with lower gestational age. © American Academy of Otolaryngology—Head and Neck Surgery Foundation 2014.

Evaluation of culture media for growth and sporulation of ...

African Journals Online (AJOL)

Colocasia esculenta) in Cameroon and no information is yet available on its culture on common media. Six artificial media, V6 juice agar, V8 juice agar, V8m juice agar, potato dextrose agar, onion agar and taro leaf agar were assessed in vitro to ...

A fast pointwise strategy for anisotropic wave-mode separation in TI media

KAUST Repository

Liu, Qiancheng

2017-08-17

The multi-component wavefield contains both compressional and shear waves. Separating wave-modes has many applications in seismic workflows. Conventionally, anisotropic wave-mode separation is implemented by either directly filtering in the wavenumber domain or nonstationary filtering in the space domain, which are computationally expensive. These methods could be categorized into the pseudo-derivative family and only work well within Finite Difference (FD) methods. In this paper, we establish a relationship between group-velocity direction and polarity direction and propose a method, which could go beyond modeling by FD. In particular, we are interested in performing wave-mode separation in a Spectral Element Method (SEM), which is widely used for seismic wave propagation on various scales. The separation is implemented pointwise, independent of its neighbor points, suitable for running in parallel. Moreover, no correction for amplitude and phase changes caused by the derivative operator is required. We have verified our scheme using numerical examples.

A fast pointwise strategy for anisotropic wave-mode separation in TI media

KAUST Repository

Liu, Qiancheng; Peter, Daniel; Lu, Yongming

2017-01-01

The multi-component wavefield contains both compressional and shear waves. Separating wave-modes has many applications in seismic workflows. Conventionally, anisotropic wave-mode separation is implemented by either directly filtering in the wavenumber domain or nonstationary filtering in the space domain, which are computationally expensive. These methods could be categorized into the pseudo-derivative family and only work well within Finite Difference (FD) methods. In this paper, we establish a relationship between group-velocity direction and polarity direction and propose a method, which could go beyond modeling by FD. In particular, we are interested in performing wave-mode separation in a Spectral Element Method (SEM), which is widely used for seismic wave propagation on various scales. The separation is implemented pointwise, independent of its neighbor points, suitable for running in parallel. Moreover, no correction for amplitude and phase changes caused by the derivative operator is required. We have verified our scheme using numerical examples.

Separation of Process Water using Hydroxy Sodalite Membranes

NARCIS (Netherlands)

Khajavi, S.

2010-01-01

This thesis describes the synthesis, characterization, and application of Hydroxy Sodalite (H-SOD) membranes in selective separation of water from aqueous solutions and reaction media. The emphasis has been put on the development of a tight membrane film that could be primarily used for water

The Journey of Business Model Innovation in Media Agencies

DEFF Research Database (Denmark)

Jensen, Henrik; Sund, Kristian J.

2018-01-01

these agencies have altered their business models over a decade. We discuss three separate stages in this innovation process, labelled business model innovation (BMI) awareness, business model exploration, and business model exploitation. We find and document how different building blocks of the business model......Digital entrants have changed the competitive landscape for advertisers and media. Over the past decade, media agencies have grown more rapidly than the media market as a whole, securing a larger share of the value generated in the advertising industry. We develop a process model describing how...... are a focal point of innovation in each stage of the BMI process. Our findings offer a way for the media industry to understand the transformation of media agencies....

Strategi Media Relations Humas PT. Pelabuhan Indonesia III Dalam Handling Crisis Pemberitaan

OpenAIRE

RM, Agesty Sabreyna; Moertijoso, R. Bambang

2015-01-01

Media Relations was a requirement for Public Relation practitioners thatPR had an important role in a relationship with media. It was because thetask of public relation was the mass media and journalist. PT PelabuhanIndonesia III (Persero) as a State-owned enterprised cannot separate withthe crisis news. The strategy of media relations was very important to handlethe negative publicity because it could affect a company’s image.This research used qualitative descriptive method with data collec...

Serologic Evaluation of Cornea Donors and Microbiologic Evaluation of Cornea Storage Media in an Eye Bank from Izmir, Turkey.

Science.gov (United States)

Palamar, Melis; Degirmenci, Cumali; Sertoz, Ruchan; Aydemir, Sohret; Egrilmez, Sait; Yagci, Ayse

2017-12-01

Our objective was to evaluate the serologic positivity of cornea donors and microbiologic positivity of cornea storage media at the Ege University Tissue and Cornea Bank, Izmir, Turkey. We retrospectively investigated the serologic blood sample and microbiological culture media analysis results of all cornea donors at Ege University Tissue and Cornea Bank between 2007 and 2015 with reference to age, sex, and cause of death of each donor. Mean age of the 955 deceased donors was 43.19 ± 15.89 years (range, 2-65 y). The mean postmortem time to blood sample removal and excision of the cornea tissue was 8.4 hours (range, 4-12 h). Serologic analyses showed that 855 donors (89.5%) were seronegative. The remaining donors were seropositive for hepatitis B (54 donors; 5.7%), human immunodeficiency (27 donors; 2.8%), hepatitis C (14 donors; 1.5%), and syphilis (5 donors; 0.5%) virus infections. Microbiologic analyses of the storage media were negative, with no microorganisms shown in 855 samples (89.5%). Candida species (32 donors; 3.4%), Escherichia coli (14 donors; 1.5%), Pseudomonas aeruginosa (11 donors; 1.2%), methicillin-resistant Staphylococcus aureus (11 donors; 1.2%), Enterobacter species (11 donors; 1.2%), Klebsiella pneumoniae (7 donors; 0.7%), Acinetobacter baumannii (6 donors; 0.6%), Proteus species (5 donors; 0.5%), and Corynebacterium species (3 donors; 0.3%) were the detected microorganisms in the infected storage media. False-positive serologic results among cornea donors were high. The incidence of false-positive results might be decreased by earlier blood removal from deceased donors and testing of all potential donors in intensive care units. Although rare, endophthalmitis after keratoplasty might be a devastating problem. In addition to serologic testing, microbiologic analyses of cornea storage media before transplant may be an effective way to prevent postoperative infectious complications.

How Media Companies Should Create Value: Innovation Centered Business Models and Dynamic Capabilities

NARCIS (Netherlands)

Kranenburg, H.L. van; Ziggers, G.W.; Friedrichsen, M.; Mühl-Benninghaus, W.; Picard, R.; Vartanova, E.

2014-01-01

Globalization, deregulation, technological innovation and the convergence of previously separated industries such as media, entertainment, information, and consumer electronics industries, have changed the media landscape into a turbulent environment. As a consequence of these developments, many

Social Media Reputation

DEFF Research Database (Denmark)

Etter, Michael; Colleoni, Elanor; Ravasi, Davide

directly to corporate performance and actions. Secondly, prominent reputation measurements couple stakeholders´ believes to reputation drivers through the use of predefined scales and items. We argue that with the rise of social media a company´s reputation has increasingly become autonomous from corporate...... actions, which demands a greater decoupling of stakeholders´ perceptions from corporate signals or actions in corporate reputation research. We develop the concept of social media reputation as the overall evaluation of a company presented in social media and present a new approach of measuring reputation...... based on social media data that accounts for the autonomy of stakeholder´s perception of a firm. We compare and contrast this novel social media reputation measure (SMRM) with traditional reputation measurements and find that SMRM is a valuable measurement to capture the autonomy of the stakeholders...

Evaluation of aqueous Na+/Cs+ separation by electrodialysis

International Nuclear Information System (INIS)

Buehler, M.F.; Lawrence, W.E.; Norton, J.D.

1993-12-01

In support of the Hanford Site cleanup, electrodialysis is being investigated as a method to separate aqueous sodium (Na + ) and cesium (Cs + ) ions. The approach has many advantages over existing separation technologies; in particular, electrodialysis creates little secondary waste while producing usable acid and base streams. The fundamentals of electrodialysis are presented in this report to provide a foundation for interpreting experimental data. A flat-plate laboratory-scale apparatus was used to determine the feasibility of separating Na + /Cs + mixtures by electrodialysis. The results showed that Cs + is preferentially separated over Na + by a factor of 2 to 3 using a Nafion reg-sign 417 cationic membrane. The separation is relatively insensitive to solution ionic strength and flow-rate variations. The current efficiency of the separation ranges from 0.60 to 0.65 depending on the applied voltage. The laboratory-scale system was characterized by dimensional analysis, which demonstrated that the process could be scaled up to a size attractive for the volume of waste at the Hanford Site. Preliminary experiments on a bench-scale system were also conducted. The initial results showed that the current-voltage response of the laboratory- and the bench-scale unit is identical

Method to manufacture bit patterned magnetic recording media

Science.gov (United States)

Raeymaekers, Bart; Sinha, Dipen N

2014-05-13

A method to increase the storage density on magnetic recording media by physically separating the individual bits from each other with a non-magnetic medium (so-called bit patterned media). This allows the bits to be closely packed together without creating magnetic "cross-talk" between adjacent bits. In one embodiment, ferromagnetic particles are submerged in a resin solution, contained in a reservoir. The bottom of the reservoir is made of piezoelectric material.

Evaluation of goat milk as storage media to preserve viability of human periodontal ligament cells in vitro.

Science.gov (United States)

Ulusoy, Ayça Tuba; Kalyoncuoglu, Elif; Kaya, Senay; Cehreli, Zafer Cavit

2016-08-01

The purpose of this study was to evaluate the effectiveness of goat milk as a storage media for maintenance of periodontal ligament (PDL) cell viability of avulsed teeth and compare it with commonly used and/or investigated storage media. PDL cells were obtained from the root surface of healthy premolars and were cultured in Eagle's maintenance medium (EMM). Cell cultures were treated with the following storage media: tap water (negative control); EMM (positive control); Hank's balanced salt solution; ultra high temperature (UHT) long-shelf-life lactose-free cow milk; UHT long-shelf-life whole cow milk; UHT long-shelf-life skimmed cow milk; UHT long-shelf-life soy milk; UHT long-shelf-life goat milk, UHT long-shelf-life follow on milk with probiotic, 20% propolis, and egg white. Culture plates were incubated with experimental media at 20°C for 1, 3, 6, 12, and 24 h. PDL cell viability was assessed by tetrazolium salt-based colorimetric (MTT) assay at each test period. One-way anova was used to evaluate the effects of storage solutions at each time point, followed by post hoc Duncan's multiple comparison test (P = 0.05). A dendrogram was constructed to show the arrangement of hierarchical clustering. Goat milk displayed the highest capacity to maintain cell viability at all test intervals (P milk with the probiotic showed the lowest time-dependent PDL cell viability among all test media (P milks, HBSS performed significantly less effectively in maintaining PDL cell viability during the entire test period (P milk can be recommended as a suitable storage medium for avulsed teeth. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

Evaluating the Effectiveness of a Mass Media Ethics Course.

Science.gov (United States)

Lee, Byung; Padgett, George

2000-01-01

Examines the effectiveness of an ethics education component in a media law and ethics course. Suggests that a short-term mass media ethics study could not develop values considered essential for ethical behavior. Argues that students developed more complexity in their reasoning not measurable by the scale. Suggests a course or module on ethics…

Radiochemical separation of Tb-149 after tandem accelerator production

International Nuclear Information System (INIS)

Sarkar, S.R.

1996-01-01

Full text: Terbium-149 is produced by the heavy ion induced reaction of the type 142 Nd( 12 C,5n) 149 Dy→ 149 Tb. This work concerns the separation of terbium from neodymium target, and other lanthanides produced by secondary reactions on neodymium target. Firstly, anion-exchange separation is carried out at room temperature using acid-alcohol media (90% methanol-10% 5M nitric acid) as eluent. But the separation is not satisfactory. To achieve satisfactory separation, cation exchange separation is performed under pressure at room temperature using 0.1 6M α-hydroxyisobutyric acid of pH 5 as eluent. The pressure is exerted from a nitrogen gas cylinder. The simplicity and efficacy of this method for the separation of terbium are discussed in comparison with the commercially available high performance liquid chromatography system

Use of Web 2.0 Social Media Platforms to Promote Community-Engaged Research Dialogs: A Preliminary Program Evaluation

Science.gov (United States)

Valdez Soto, Miguel; Bishop, Shawn G; Aase, Lee A; Timimi, Farris K; Montori, Victor M; Patten, Christi A

2016-01-01

Background Community-engaged research is defined by the Institute of Medicine as the process of working collaboratively with groups of people affiliated by geographic proximity, special interests, or similar situations with respect to issues affecting their well-being. Traditional face-to-face community-engaged research is limited by geographic location, limited in resources, and/or uses one-way communications. Web 2.0 technologies including social media are novel communication channels for community-engaged research because these tools can reach a broader audience while promoting bidirectional dialogs. Objective This paper reports on a preliminary program evaluation of the use of social media platforms for promoting engagement of researchers and community representatives in dialogs about community-engaged research. Methods For this pilot program evaluation, the Clinical and Translational Science Office for Community Engagement in Research partnered with the Social Media Network at our institution to create a WordPress blog and Twitter account. Both social media platforms were facilitated by a social media manager. We used descriptive analytics for measuring engagement with WordPress and Twitter over an 18-month implementation period during 2014-2016. For the blog, we examined type of user (researcher, community representative, other) and used content analysis to generate the major themes from blog postings. For use of Twitter, we examined selected demographics and impressions among followers. Results There were 76 blog postings observed from researchers (48/76, 64%), community representatives (23/76, 32%) and funders (5/76, 8%). The predominant themes of the blog content were research awareness and dissemination of community-engaged research (35/76, 46%) and best practices (23/76, 30%). For Twitter, we obtained 411 followers at the end of the 18-month evaluation period, with an increase of 42% (from 280 to 411) over the final 6 months. Followers reported varied

Use of Web 2.0 Social Media Platforms to Promote Community-Engaged Research Dialogs: A Preliminary Program Evaluation.

Science.gov (United States)

Valdez Soto, Miguel; Balls-Berry, Joyce E; Bishop, Shawn G; Aase, Lee A; Timimi, Farris K; Montori, Victor M; Patten, Christi A

2016-09-09

Community-engaged research is defined by the Institute of Medicine as the process of working collaboratively with groups of people affiliated by geographic proximity, special interests, or similar situations with respect to issues affecting their well-being. Traditional face-to-face community-engaged research is limited by geographic location, limited in resources, and/or uses one-way communications. Web 2.0 technologies including social media are novel communication channels for community-engaged research because these tools can reach a broader audience while promoting bidirectional dialogs. This paper reports on a preliminary program evaluation of the use of social media platforms for promoting engagement of researchers and community representatives in dialogs about community-engaged research. For this pilot program evaluation, the Clinical and Translational Science Office for Community Engagement in Research partnered with the Social Media Network at our institution to create a WordPress blog and Twitter account. Both social media platforms were facilitated by a social media manager. We used descriptive analytics for measuring engagement with WordPress and Twitter over an 18-month implementation period during 2014-2016. For the blog, we examined type of user (researcher, community representative, other) and used content analysis to generate the major themes from blog postings. For use of Twitter, we examined selected demographics and impressions among followers. There were 76 blog postings observed from researchers (48/76, 64%), community representatives (23/76, 32%) and funders (5/76, 8%). The predominant themes of the blog content were research awareness and dissemination of community-engaged research (35/76, 46%) and best practices (23/76, 30%). For Twitter, we obtained 411 followers at the end of the 18-month evaluation period, with an increase of 42% (from 280 to 411) over the final 6 months. Followers reported varied geographic location (321/411, 78

Social media and everyday language use among Copenhagen youth

DEFF Research Database (Denmark)

Stæhr, Andreas

carried out online ethnography by following the adolescents’ activities on Facebook. In the dissertation I pursue the topics of social media and sociolinguistic normativity and social media, semiotic resources and popular culture. Regarding the first thematic direction I find that social network sites......The dissertation concerns the role of social media in young peoples’ everyday lives and it addresses how social media can be approached from a sociolinguistic and ethnographic perspective. My research is driven by an interest in how the complexity and mobility of linguistic and social resources...... are not free or unregulated orthographic spaces as depicted in public discourses on youth and social media, that linguistic and social normativity is polycentrically organized and that spoken and written discourse should not be separated in accounts of enregisterment in contemporary societies. Regarding...

Comparison between Microscopic and Endoscopic Approaches for Evaluation of Anatomic Areas in Surgically Treated Chronic Otitis Media

Directory of Open Access Journals (Sweden)

M.T. Goodarzi

2013-07-01

Full Text Available Introduction & Objective: The diagnostic value of endoscopic and microscopic procedures for viewing different structures of middle ear has been widely assessed however, no published study is available for comparing the diagnostic value of them in chronic otitis media patients. The present study conducted to compare diagnostic value of these two procedures for as-sessment of middle ear normal structures and possible defects in these patients. Materials & Methods: In a prospective descriptive analytical study, fifty eight consecutive pa-tients older than 15 years who suffered from chronic otitis media and were candidates for tympanoplasty with or without mastoidectomy were included into the study and underwent operation. After entering the middle ear by post auricular incision and elevation of a tym-panomeatal flap, and prior to surgery , the middle ear was first examined by an operating mi-croscope in different bed and microscope positions and by performing gentle maneuvers on the head and then was reevaluated using a rigid 0 & 30 degree sinoscope. The visible areas of middle ear were separately noted. Results: Structures of epitympanum, posterior mesotympanum, and hypotympanum structures were more visible using endoscope compared with microscope(P0.05. Conclusion: Endoscopic and microscopic procedures had similar diagnostic values to view ossicular chain mobility and reflexes of round window as well as to detect ossicular chain erosions, but different anatomical parts and more hidden pits of the middle ear such as epitympanum, posterior mesotympanum, and hypotympanum are more visible by an endoscopic tool.In case of pathologic conditions, endoscopic approach is recommended for better observation and adequate evaluation of the location before and after the removal of the lesion. (Sci J Hamadan Univ Med Sci 2013; 20 (2:95-100

Electromagnetism on anisotropic fractal media

Science.gov (United States)

Ostoja-Starzewski, Martin

2013-04-01

Basic equations of electromagnetic fields in anisotropic fractal media are obtained using a dimensional regularization approach. First, a formulation based on product measures is shown to satisfy the four basic identities of the vector calculus. This allows a generalization of the Green-Gauss and Stokes theorems as well as the charge conservation equation on anisotropic fractals. Then, pursuing the conceptual approach, we derive the Faraday and Ampère laws for such fractal media, which, along with two auxiliary null-divergence conditions, effectively give the modified Maxwell equations. Proceeding on a separate track, we employ a variational principle for electromagnetic fields, appropriately adapted to fractal media, so as to independently derive the same forms of these two laws. It is next found that the parabolic (for a conducting medium) and the hyperbolic (for a dielectric medium) equations involve modified gradient operators, while the Poynting vector has the same form as in the non-fractal case. Finally, Maxwell's electromagnetic stress tensor is reformulated for fractal systems. In all the cases, the derived equations for fractal media depend explicitly on fractal dimensions in three different directions and reduce to conventional forms for continuous media with Euclidean geometries upon setting these each of dimensions equal to unity.

Recommending access control decisions to social media users

OpenAIRE

Misra, Gaurav; Such, Jose M.

2017-01-01

Social media has become an integral part of the Internet and has revolutionized interpersonal communication. The lines of separation between content creators and content consumers have blurred as normal users have platforms such as social media sites, blogs and microblogs at their disposal on which they can create and consume content as well as have the opportunity to interact with other users. This change has also led to several well documented privacy problems for the users. The privacy pro...

Qualitative process evaluation of an Australian alcohol media literacy study: recommendations for designing culturally responsive school-based programs

Directory of Open Access Journals (Sweden)

Chloe S. Gordon

2017-02-01

Full Text Available Abstract Background Alcohol media literacy programs seek to mitigate the potentially harmful effects of alcohol advertising on children’s drinking intentions and behaviours through equipping them with skills to challenge media messages. In order for such programs to be effective, the teaching and learning experiences must be tailored to their specific cultural context. Media in the Spotlight is an alcohol media literacy program aimed at 9 to 12 year old Australian children. This study evaluates the process and implementation of the program, outlining the factors that facilitated and inhibited implementation. From this evaluation, a pedagogical framework has been developed for health professionals implementing culturally responsive programs in school settings. Methods Process measures included: semi-structured interviews with teachers before and after the program was implemented (n = 11 interviews, program evaluation questionnaires completed by children (n = 166, lesson observations completed by teachers (n = 35 observations, and reflective journal entries completed by the researcher (n = 44 entries. A thematic analysis approach was used to analyse all of the data sets using NVivo. Inductive coding was used, whereby the findings were derived from the research objectives and multiple readings and interpretations of the data. Results Five key pedagogical considerations were identified that facilitated implementation. These were: connecting to the students’ life worlds to achieve cultural significance; empowering students with real-world skills to ensure relevance; ensuring programs are well structured with strong connections to the school curriculum; creating developmentally appropriate activities while providing a range of assessment opportunities; and including hands-on and interactive activities to promote student engagement. Three potential inhibitors to implementing the alcohol media literacy program in upper

Qualitative process evaluation of an Australian alcohol media literacy study: recommendations for designing culturally responsive school-based programs.

Science.gov (United States)

Gordon, Chloe S; Kervin, Lisa K; Jones, Sandra C; Howard, Steven J

2017-02-02

Alcohol media literacy programs seek to mitigate the potentially harmful effects of alcohol advertising on children's drinking intentions and behaviours through equipping them with skills to challenge media messages. In order for such programs to be effective, the teaching and learning experiences must be tailored to their specific cultural context. Media in the Spotlight is an alcohol media literacy program aimed at 9 to 12 year old Australian children. This study evaluates the process and implementation of the program, outlining the factors that facilitated and inhibited implementation. From this evaluation, a pedagogical framework has been developed for health professionals implementing culturally responsive programs in school settings. Process measures included: semi-structured interviews with teachers before and after the program was implemented (n = 11 interviews), program evaluation questionnaires completed by children (n = 166), lesson observations completed by teachers (n = 35 observations), and reflective journal entries completed by the researcher (n = 44 entries). A thematic analysis approach was used to analyse all of the data sets using NVivo. Inductive coding was used, whereby the findings were derived from the research objectives and multiple readings and interpretations of the data. Five key pedagogical considerations were identified that facilitated implementation. These were: connecting to the students' life worlds to achieve cultural significance; empowering students with real-world skills to ensure relevance; ensuring programs are well structured with strong connections to the school curriculum; creating developmentally appropriate activities while providing a range of assessment opportunities; and including hands-on and interactive activities to promote student engagement. Three potential inhibitors to implementing the alcohol media literacy program in upper-elementary school classrooms were identified. These included topic

Radiographic and computed tomographic evaluation of otitis media in the dog

International Nuclear Information System (INIS)

Love, N.E.; Kramer, R.W.; Spodnick, G.J.; Thrall, D.E.

1995-01-01

The purpose of this study was to compare computed tomography (CT) and radiography in the identification of canine middle ear disease. Fourteen canine patients underwent a radiographic “bullae series” and CT examination of the tympanic bullae. Confirmation of otitis media was based on surgery. The overall diagnostic accuracy of CT and radiographs regarding the diagnosis of otitis media was similar. Although a marked difference was not detected between radiographs and CT for detecting otitis media using Youden's index values, CT was a more sensitive test for the detection of otitis media

Customer Engagement & Loyalty Cultivation Through Social Media : A Small Business Perspective

OpenAIRE

Starkenberg, Marilyn; Åman, Jacob; Magnusson, Kristin

2013-01-01

Background:  Social media is a constantly growing medium for communication that enables companies to interact with current and potential customers. It is of utmost importance that companies learn how to use social media in order to engage their customers, which will lead to greater customer loyalty. There is a large amount of literature on social media and customer loyalty separately, but not on how these subjects relate and interact. Therefore, the case study performed involving Mormor Magda...

Separation of rubidium from irradiated aluminum-encapsulated uranium

International Nuclear Information System (INIS)

Horwitz, E.P.; Schmitz, F.J.; Rokop, D.J.

1982-01-01

A procedure was developed for separating rubidium from irradiated aluminum encapsulated uranium. The separations procedure produces a final ultra-high purity RbCl product for subsequent high performance mass spectrometric analysis. The procedure involves first removing most of the macro-components and fission products by strong base anion exchange using, first, concentrated HCl, then oxalic acid media and second, selectively separating rubidium from alkaline-earth ions and other alkali-metal ions, including cesium, using Bio-Rex-40 cation-exchange resin. The resultant RbCl is then put through a final vacuum sublimation step. Ultra-pure reagents and specially clean glassware are used throughout the procedure to minimize contamination by naturally-occurring rubidium

Teachers’ ability in using math learning media

Science.gov (United States)

Masniladevi; Prahmana, R. C. I.; Helsa, Y.; Dalais, M.

2017-12-01

The studies aim to enhance teachers’ knowledge and skill in making math instructional media, develop math instructional media, train and assist the use of instructional media in learning math in the classroom. The method used in the activities adopted the pattern of preventive implementation, planning stage, program implementation, observation and evaluation and reflection. The research results show that the evaluation of teachers’ ability is still in average category. The result required more intensive training.

Mineralogy and geochemistry of density-separated Greek lignite fractions

NARCIS (Netherlands)

Iordanidis, A.; Doesburg, van J.D.J.

2006-01-01

In this study, lignite samples were collected from the Ptolemais region, northern Greece, homogenized, crushed to less than I nun, and separated in three density fractions using heavy media. The mineralogical investigation of the density fractions showed a predominance of pyrite in the light

Media Use by Children, and Parents' Views on Children's Media Usage.

Science.gov (United States)

Dinleyici, Meltem; Carman, Kursat Bora; Ozturk, Emel; Sahin-Dagli, Figen

2016-06-07

New (mobile phones, smartphones, tablets, and social media) and traditional media (television) have come to dominate the lives of many children and adolescents. Despite all of this media time and new technology, many parents seem to have few rules regarding the use of media by their children and adolescents. The aim of this study was to evaluate media access/use of children and to evaluate beliefs and attitudes of parents concerning the use of old and new media in Turkey. This is a cross-sectional electronic survey of a national convenience sample in Turkey via SurveyMonkey, including 41 questions regarding topics relevant to television, computers, mobile phones, iPad/tablet use, and social media accounts. The responses of the 333 participants (238 women, 95 men; 27-63 years) were evaluated. The average daily watching alone time was 0 to 2 hours among 53.4% (46/86), and daily coviewing time with parents of children was 0 to 2 hours among 62.7% (54/86) of children below 2 years of age. Regarding parents' monitoring their children's computer use (n=178), 35.4% (63/178) of the parents prefer coviewing, 13.5% of the parents use a family filter (24/178), and 33.1% (59/178) of the parents prefer to check Web history. Approximately 71.2% (237/333) of the participants had an iPad/tablet in the house, 84.3% (200/333) of the parents give their children permission to use the iPad/tablet. Of the parents, 22.5% (45/200) noted that their children used the iPad/tablet at the table during lunch/dinner and 57.9% (26/45) of these children were aged 5 years and below. Of parents, 27.3% (91/333) agreed that the optimal age for owning a mobile phone was 12 years, and 18.0% (60/333) of the parents noted that their children (one-third was below 2 years) used the mobile phone at the table during meals. A total of 33.3% (111/333) children/adolescents have a Facebook profile, and 54.0% (60/111) were below 13 years of age. Approximately 89.2% (297/333) of the parents emphasized that the

Liquid-liquid extraction and separation studies of uranium(VI)

International Nuclear Information System (INIS)

Langade, A.D.; Shinde, V.M.

1980-01-01

Separation of uranium(VI) from iron(III), molybdenum(VI), vanadium(V), bismuth(III), zirconium(IV) and thorium(IV) is achieved by liquid-liquid extraction with 4-methyl-3-pentene-2-one (mesityl oxide; MeO) from sodium salicylate media (0.1M, pH 6.0). The extracted species is UO 2 (HO.C 6 H 4 COO) 2 .2MeO. A procedure for separating 50 μg of uranium from mg amounts of the other metals is described. (author)

Replacement of low pressure reheater and performance evaluation on domestic NPP moisture separator reheater

International Nuclear Information System (INIS)

Choi, Y. S.; Jeong, W. T.; Shon, S. Y.; Kim, M. H.

2003-01-01

Moisture Separator Reheater is one of the most important equipment for the integrity of low pressure turbine and the total efficiency of the nuclear power plant, It supplies the dry steam to low pressure turbine after separation of moisture and reheating the wet steam out of high pressure turbine. This equipment is always operated under severe conditions, therefore it should be carefully maintained for safe operation and operating confidence. After replacement low pressure reheater of moister separator reheater on domestic nuclear power plant, there was MSR performance degradation and vibration of condensate drain line. So I found out root cause and commented a solution, site people modified the equipment. Finally I concluded the performanc of MSR was good condition, after I inspected the equipment and evaluated the performance of MSR

Social media, help or hindrance: what role does social media play in young people's mental health?

Science.gov (United States)

Lloyd, Alfie

2014-11-01

Social media is a huge force in the lives of young people with wide ranging effects on their development; given the importance of adolescence in the genesis of mental illness, social media is a factor in the mental health of young people. Despite the role that social media obviously plays in the development of mental illness, little research has been done into the impact that social media has on in the mental illness of young people. In general, what research there is points towards social media having a large impact on young people in both positive and negative ways. In particular, certain studies show a greater incidence and severity of bullying online compared to offline which may contribute to the development of depression. This contrasts with the positive impact that social media seems to have for young people in minority groups (ethnic minorities and those with chronic disease or disability) by allowing them to connect with others who live similar lives despite geographical separation. This acts as a positive influence in these people's lives though a direct link to mental illness was not shown. Overall, several important issues are raised: firstly, the lack of research that has been conducted in the area; secondly, the gulf that exists between the generation of younger, 'digital native' generations and the older generations who are not as engaged with social media; and finally, the huge potential that exists for the use of social media as a protective influence for adolescents. With proper engagement, policy makers and health professionals could use social media to connect with young people on issues like mental health.

Biodegradation of ion-exchange media

International Nuclear Information System (INIS)

Bowerman, B.S.; Clinton, J.H.; Cowdery, S.R.

1988-08-01

Ion-exchange media, both bead resins and powdered filter media, are used in nuclear power plants to remove radioactivity from process water prior to reuse or environmental discharge. Since the ion- exchange media are made from synthetic hydrocarbon-based polymers, they may be susceptible to damage from biological activity. The purpose of this study was to investigate some of the more basic aspects of biodegradation of ion-exchange media, specifically to evaluate the ability of microorganisms to utilize the ion-exchange media or materials sorbed on them as a food source. The ASTM-G22 test, alone and combined with the Bartha Pramer respirometric method, failed to indicate the biodegradability of the ion-exchange media. The limitation of these methods was that they used a single test organism. In later phases of this study, a mixed microbial culture was grown from resin waste samples obtained from the BNL High Flux Beam Reactor. These microorganisms were used to evaluate the susceptibility of different types of ion-exchange media to biological attack. Qualitative assessments of biodegradability were based on visual observations of culture growths. Greater susceptibility was associated with increased turbidity in solution indicative of bacterial growth, and more luxuriant fungal mycelial growth in solution or directly on the ion-exchange resin beads. 21 refs., 9 figs., 18 tabs

Interface effects on dose distributions in irradiated media

International Nuclear Information System (INIS)

Wright, H.A.; Hamm, R.N.; Turner, J.E.

1980-01-01

It has long been recognized that nonuniformities in dose distributions may occur in the immediate vicinity of a boundary between two different media. Considerable work has been done to determine interface effects in media irradiated by photons or in media containing β- or α-particle emitters. More recently interface effects have become of interest in additional problems, including pion radiotherapy and radiation effects in electronic microcircuits in space vehicles. These problems arise when pion capture stars or proton-nucleus interactions produce a spectrum of charged nuclear fragments near an interface. The purpose of this paper is to examine interface effects in detail as to their specific origin. We have made Monte Carlo calculations of dose distributions near an interface in a systematic way for a number of idealized cases in order to indicate the separate influences of several factors including different stopping powers of the two media, nonconstancy (e.g., Bragg peak) in the energy loss curve for the particles, different particle spectra in the two media, and curvature of the boundary between the two media

Lessons learned from the Syrian sarin attack: evaluation of a clinical syndrome through social media.

Science.gov (United States)

Rosman, Yossi; Eisenkraft, Arik; Milk, Nadav; Shiyovich, Arthur; Ophir, Nimrod; Shrot, Shai; Kreiss, Yitshak; Kassirer, Michael

2014-05-06

On the night of 21 August 2013, sarin was dispersed in the eastern outskirts of Damascus, killing 1400 civilians and severely affecting thousands more. This article aims to delineate the clinical presentation and management of a mass casualty event caused by a nerve agent as shown in the social media. Authors searched YouTube for videos uploaded of this attack and identified 210 videos. Of these, 67 met inclusion criteria and were evaluated in the final analysis.These videos displayed 130 casualties; 119 (91.5%) of which were defined as moderately injured or worse. The most common clinical signs were dyspnea (53.0%), diaphoresis (48.5%), and loss of consciousness (40.7%). Important findings included a severe shortage of supporting measures and lack of antidotal autoinjectors. Decontamination, documented in 25% of the videos, was done in an inefficient manner. Protective gear was not noticed, except for sporadic use of latex gloves and surgical masks.This is believed to be the first time that social media was used to evaluate clinical data and management protocols to better prepare against future possible events.

Thinspiration: Self-Improvement Versus Self-Evaluation Social Comparisons with Thin-Ideal Media Portrayals.

Science.gov (United States)

Knobloch-Westerwick, Silvia

2015-01-01

Much research has demonstrated negative impacts of idealized-body imagery exposure on body satisfaction. Yet, paradoxically, media with such imagery attract mass audiences. Few studies showed women's body satisfaction increased due to thin-ideal exposure. The kind of social comparison women engage in (self-evaluation vs. self-improvement) may explain these inconsistent findings and the paradoxical attraction to thin-ideal messages. Across 5 days, thin-ideal messages were presented to 51 women; self-evaluation and self-improvement social comparisons as well as body satisfaction were measured each day. A linear positive change in body satisfaction emerged. Greater self-improvement social comparisons increased this change, whereas greater self-evaluation social comparisons reduced it. Extent of both social comparison types changed during the prolonged exposure. A greater tendency to compare one's body with others' improved body satisfaction through self-improvement social comparisons and fostered weight-loss behaviors through self-evaluation social comparisons.

The role of social media in schizophrenia: evaluating risks, benefits, and potential.

Science.gov (United States)

Torous, John; Keshavan, Matcheri

2016-05-01

Patients with schizophrenia suffer from numerous social problems often because of negative symptoms of the illness and impairments in social cognition. Social media and social networks now offer a novel tool to engage and help patients navigate and potentially improve social functioning. In this review, we aim to explore how impaired neural networks in schizophrenia impair social functioning, examine the evidence base for social networks and social media to help in the role, consider the evidence for current risks and benefits of use, and discuss the future of social media and social networks for schizophrenia. Patients with schizophrenia are increasingly connected to and engaged with social media. There is strong evidence that they own, use, and accept digital tools like smartphones and already use social media services like Facebook at high rates, especially among those who are younger. Less is known about the clinical risks and benefits of social media use in schizophrenia, although there are increasingly more social networking platforms being designed specifically for those with mental illness. Social media tools have the potential to offer a plethora of new services to patients with schizophrenia, although the clinical evidence base for such is still nascent. It is important to ensure that both clinicians and patients are aware of and educated about the risks of using social media. Going forward, it is likely that social media will have an expanding role in care, with social media offering new pathways to address negative symptoms and impairments in social cognition in schizophrenia.

Impairment in the recognition of emotion across different media following traumatic brain injury.

Science.gov (United States)

Williams, Claire; Wood, Rodger Ll

2010-02-01

The current study examined emotion recognition following traumatic brain injury (TBI) and examined whether performance differed according to the affective valence and type of media presentation of the stimuli. A total of 64 patients with TBI and matched controls completed the Emotion Evaluation Test (EET) and Ekman 60 Faces Test (E-60-FT). Patients with TBI also completed measures of information processing and verbal ability. Results revealed that the TBI group were significantly impaired compared to controls when recognizing emotion on the EET and E-60-FT. A significant main effect of valence was found in both groups, with poor recognition of negative emotions. However, the difference between the recognition of positive and negative emotions was larger in the TBI group. The TBI group were also more accurate recognizing emotion displayed in audiovisual media (EET) than that displayed in still media (E-60-FT). No significant relationship was obtained between emotion recognition tasks and information-processing speed. A significant positive relationship was found between the E-60-FT and one measure of verbal ability. These findings support models of emotion that specify separate neurological pathways for certain emotions and different media and confirm that patients with TBI are vulnerable to experiencing emotion recognition difficulties.

Fashion alienation: older adults and the mass media.

Science.gov (United States)

Kaiser, S B; Chandler, J L

1984-01-01

A self-administered questionnaire including questions related to fashion alienation, frequency of use of mass media for fashion information, and demographics was completed by 209 "50-plus" aged consumers in Northern California. Fashion alienation was measured using ten separate statements related to 1) degree of identification with fashion symbols in the media and 2) feelings of social and economic estrangement from fashion. Two of the statements produced significant regression models. In both statements, age was positively related to fashion alienation, and there was an inverse relationship between frequency of use of media for fashion information and fashion alienation. The data provide implications for a conceptual distinction between information and meaning processing with regard to fashion.

Evaluation and ranking of the tank focus area solid liquid separation needs

Energy Technology Data Exchange (ETDEWEB)

McCabe, D.J.

1995-08-17

The Tank Focus Area (TFA) of the Department of Energy (DOE) Office of Environmental Restoration and Waste Management (EM) addresses remediation of liquid waste currently stored in underground tanks. Several baseline technologies for treatment of tank waste can be categorized into three types of solid liquid separation: (a) removal of radioactive species that have been absorbed or precipitated, (b) pretreatment for ion exchange, and (c) volume reduction of sludge and wash water. The solids formed from precipitation or absorption of radioactive ions require separation from the liquid phase to permit treatment of the liquid as Low Level Waste. Prior to ion exchange of radioactive ions, removal of insoluble solids is needed to prevent bed fouling and downstream contamination. Volume reduction of washed sludge solids would reduce the tank space required for interim storage. The scope of this document is to evaluate the solid/liquid separations needed to permit treatment of tank wastes to accomplish these goals. The document summarizes previous alkaline waste testing, with an emphasis on crossflow filtration, to-obtain a general understanding of the behavior of radioactive wastes on available equipment. The document also provides general information about filtration and a path forward for testing.

Evaluation and ranking of the tank focus area solid liquid separation needs

International Nuclear Information System (INIS)

McCadbe, D.J.

1995-01-01

The Tank Focus Area (TFA) of the Department of Energy (DOE) Office of Environmental Restoration and Waste Management (EM) addresses remediation of liquid waste currently stored in underground tanks. Several baseline technologies for treatment of tank waste can be categorized into three types of solid liquid separation: (a) removal of radioactive species that have been absorbed or precipitated, (b) pretreatment for ion exchange, and (c) volume reduction of sludge and wash water. The solids formed from precipitation or absorption of radioactive ions require separation from the liquid phase to permit treatment of the liquid as Low Level Waste. Prior to ion exchange of radioactive ions, removal of insoluble solids is needed to prevent bed fouling and downstream contamination. Volume reduction of washed sludge solids would reduce the tank space required for interim storage. The scope of this document is to evaluate the solid/liquid separations needed to permit treatment of tank wastes to accomplish these goals. The document summarizes previous alkaline waste testing, with an emphasis on crossflow filtration, to-obtain a general understanding of the behavior of radioactive wastes on available equipment. The document also provides general information about filtration and a path forward for testing

Evaluation of chromatographic columns packed with semi- and fully porous particles for benzimidazoles separation.

Science.gov (United States)

Gonzalo-Lumbreras, Raquel; Sanz-Landaluze, Jon; Cámara, Carmen

2015-07-01

The behavior of 15 benzimidazoles, including their main metabolites, using several C18 columns with standard or narrow-bore diameters and different particle size and type were evaluated. These commercial columns were selected because their differences could affect separation of benzimidazoles, and so they can be used as alternative columns. A simple screening method for the analysis of benzimidazole residues and their main metabolites was developed. First, the separation of benzimidazoles was optimized using a Kinetex C18 column; later, analytical performances of other columns using the above optimized conditions were compared and then individually re-optimized. Critical pairs resolution, analysis run time, column type and characteristics, and selectivity were considered for chromatographic columns comparison. Kinetex XB was selected because it provides the shortest analysis time and the best resolution of critical pairs. Using this column, the separation conditions were re-optimized using a factorial design. Separations obtained with the different columns tested can be applied to the analysis of specific benzimidazoles residues or other applications. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

PEREMPUAN DALAM JERATAN EKSPLOITASI MEDIA MASSA

Directory of Open Access Journals (Sweden)

Delmira Syafrini

2014-06-01

Full Text Available Exploitation of women now comes in new faces; through the mass media. Media currently has a dual role, like two sides of a coin, on one side the media serves as a mediator for the improvement and progress of the nation, on the other side contributes to the suppression of media for the benefit of market capitalism toward consumer culture women once again being the subject of image construction. Expansion of the market and the mass media can not be separated from the flow of consumerism, because the mass media (particularly advertising on television is an extension of the market to boost sales of industrial products in the form of imagery that originates from the "mode of production". Through the process of meaning people are affected by the image created by the market and advertisement that increase their consumptive behavior. Here begins the role of advertising in blurring the identity as the supporting tool of consumerism, therefore those who identify themselves as modern men are no longer themselves but apparently no more than "Robot Man" impersonator without original identity, the principle of life pawned in the name of modernity. Women are vying to look beautiful, to buy up all whitening products, hair straightener tools, body slimming drugs, making them "Paranoid" who are restless because being haunted by old age. Actually they are aware of the exploitation, but enjoy it on the pretext of style and fashion. Key words: women, exploitation, mass media

New test techniques to evaluate near field effects for supersonic store carriage and separation

Science.gov (United States)

Sawyer, Wallace C.; Stallings, Robert L., Jr.; Wilcox, Floyd J., Jr.; Blair, A. B., Jr.; Monta, William J.; Plentovich, Elizabeth B.

1989-01-01

Store separation and store carriage drag studies were conducted. A primary purpose is to develop new experimental methods to evaluate near field effects of store separation and levels of store carriage drag associated with a variety of carriage techniques for different store shapes and arrangements. Flow field measurements consisting of surface pressure distributions and vapor screen photographs are used to analyze the variations of the store separation characteristics with cavity geometry. Store carriage drag measurements representative of tangent, semi-submerged, and internal carriage installations are presented and discussed. Results are included from both fully metric models and models with only metric segments (metric pallets) and the relative merits of the two are discussed. Carriage drag measurements for store installations on an aircraft parent body are compared both with prediction methods and with installations on a generic parent body.

Computed tomography study of otitis media; A tomografia computadorizada no estudo das otites medias

Energy Technology Data Exchange (ETDEWEB)

Bahia, Paulo Roberto Valle; Marchiori, Edson [Universidade Federal, Rio de Janeiro, RJ (Brazil). Dept. de Radiologia

1997-03-01

The findings of computed tomography (CT) of 89 patients clinically suspected of having otitis media were studied in this work. Such results were compared to clinical diagnosis, otoscopy, surgical findings and previous data. Among the results of our analysis, we studied seven patients with acute otitis media and 83 patients with chronic otitis media. The patients with acute otitis media have undergone CT examinations to evaluate possible spread to central nervous system. The diagnosis of cholesteatoma, its extension and complications were the main indication. for chronic otitis media study. The main findings of the cholesteatomatous otitis were the occupation of the epitympanun, the bony wall destruction and the ossicular chain erosion. The CT demonstrated a great sensibility to diagnose the cholesteatoma. (author) 25 refs., 10 figs.

Basic separative power of multi-component isotopes separation in a gas centrifuge

International Nuclear Information System (INIS)

Jiang, Hongmin; Lei, Zengguang; Zhuge, Fu

2008-01-01

On condition that the overall separation factor per unit exists in centrifuge for multi-component isotopes separation, the relations between separative power of each component and molecular weight have been investigated in the paper while the value function and the separative power of binary-component separation are adopted. The separative power of each component is proportional to the square of the molecular weight difference between its molecular weight and the average molecular weight of other remnant components. In addition, these relations are independent on the number of the components and feed concentrations. The basic separative power and related expressions, suggested in the paper, can be used for estimating the separative power of each component and analyzing the separation characteristics. The most valuable application of the basic separative power is to evaluate the separative capacity of centrifuge for multi-component isotopes. (author)

Entrainment separator performance

International Nuclear Information System (INIS)

First, M.W.; Leith, D.

1976-01-01

Clean and dust-loaded ACS entrainment separators mounted upstream of HEPA filters were exposed to a combination of fine water mist and steam at about 70 0 C from one to four hours. In every trial, the ACS entrainment separator prevented measurable deterioration of performance in the following HEPA filter. Droplet size-efficiency evaluation of the ACS entrainment separators showed that, within the accuracy of the measurements, they meet all service requirements and are fully equal to the best separator units available for service on pressurized water reactors

An evaluation of a mass media campaign to encourage parents of adolescents to talk to their children about sex.

Science.gov (United States)

DuRant, Robert H; Wolfson, Mark; LaFrance, Betty; Balkrishnan, Rajesh; Altman, David

2006-03-01

We evaluated a mass media campaign in North Carolina that used television (TV) public service announcements (PSAs), radio PSAs, and billboards to encourage parents of adolescents to talk to their children about sex. The primary message of the campaign was "Talk to your kids about sex. Everyone else is." Thirty-two of the 100 counties in North Carolina were chosen to evaluate the mass media campaign. Paid TV PSAs were aired in 22 of these counties, radio PSAs were aired in 21 counties, and billboards were displayed in 6 counties over a period of 9 months. The counties in our sample varied from no exposure to exposure to all 3 types of media. To assess the impact of the campaign, a sample of 1,132 parents of adolescents living in the 32 counties was administered a postexposure survey via a telephone interview. Questions about exposure to the media campaign were embedded among questions concerning media exposure to other health-related messages. The parent survey assessed the frequency the parents reported exposure to each type of media message, correct knowledge of the message, and multiple item scales that assessed how often they had talked to their child about various issues related to sex during the previous 6 months, intentions to talk to their child about these issues during the next month, and attitudes about discussing sexual issues with their child. In bivariate analyses the levels of parental exposure to the 3 types of media messages were associated with both having talked to their children and intentions to talk to their children about sex (p TV PSA about sex, and frequency of hearing a radio PSA about sex and teenage pregnancy accounted for 12.8% (p TV PSA about sex, and frequency of hearing radio PSAs about sex accounted for 12.3% of the variation in parental intentions to talk to their child about sex during the next month. Exposure to each component of this mass media campaign was associated with parents recently having talked to their adolescent

A Review of Biorefinery Separations for Bioproduct Production via Thermocatalytic Processing.

Science.gov (United States)

Nguyen, Hannah; DeJaco, Robert F; Mittal, Nitish; Siepmann, J Ilja; Tsapatsis, Michael; Snyder, Mark A; Fan, Wei; Saha, Basudeb; Vlachos, Dionisios G

2017-06-07

With technological advancement of thermocatalytic processes for valorizing renewable biomass carbon, development of effective separation technologies for selective recovery of bioproducts from complex reaction media and their purification becomes essential. The high thermal sensitivity of biomass intermediates and their low volatility and high reactivity, along with the use of dilute solutions, make the bioproducts separations energy intensive and expensive. Novel separation techniques, including solvent extraction in biphasic systems and reactive adsorption using zeolite and carbon sorbents, membranes, and chromatography, have been developed. In parallel with experimental efforts, multiscale simulations have been reported for predicting solvent selection and adsorption separation. We discuss various separations that are potentially valuable to future biorefineries and the factors controlling separation performance. Particular emphasis is given to current gaps and opportunities for future development.

Novel reprocessing methods with nuclide separation for volume reduction of high level radioactive waste

International Nuclear Information System (INIS)

Suzuki, Tatsuya

2015-01-01

We have proposed the reprocessing system with nuclide separation processes based on the chromatographic technique in the hydrochloric acid solution system. Our proposing system consists of the dissolution process, the reprocessing process, the MA separation process, and nuclide separation processes. In our proposing processes, the pyridine resin is used as a main separation media. We expect that our proposing will contribute to that volume reduction of high level radioactive waste by combining the transmutation techniques, usage of valuable elements, and so on. (author)

Interpersonal versus Mass Media Communication: A False Dichotomy.

Science.gov (United States)

Reardon, Kathleen K.; Rogers, Everett M.

1988-01-01

Challenges the intellectual separation of interpersonal and mass media communication, arguing that this division rests primarily on grounds of historical convenience and university politics. Discusses the consequences of this dichotomy and suggests ways of encouraging intellectual exchange between the two subdisciplines. (MM)

Porous media experience applicable to field evaluation for compressed air energy storage

Energy Technology Data Exchange (ETDEWEB)

Allen, R.D.; Gutknecht, P.J.

1980-06-01

A survey is presented of porous media field experience that may aid in the development of a compressed air energy storage field demonstration. Work done at PNL and experience of other groups and related industries is reviewed. An overall view of porous media experience in the underground storage of fluids is presented. CAES experience consists of site evaluation and selection processes used by groups in California, Kansas, and Indiana. Reservoir design and field evaluation of example sites are reported. The studies raised questions about compatibility with depleted oil and gas reservoirs, storage space rights, and compressed air regulations. Related experience embraces technologies of natural gas, thermal energy, and geothermal and hydrogen storage. Natural gas storage technology lends the most toward compressed air storage development, keeping in mind the respective differences between stored fluids, physical conditions, and cycling frequencies. Both fluids are injected under pressure into an aquifer to form a storage bubble confined between a suitable caprock structure and partially displaced ground water. State-of-the-art information is summarized as the necessary foundation material for field planning. Preliminary design criteria are given as recommendations for basic reservoir characteristics. These include geometric dimensions and storage matrix properties such as permeability. Suggested ranges are given for injection air temperature and reservoir pressure. The second step in developmental research is numerical modeling. Results have aided preliminary design by analyzing injection effects upon reservoir pressure, temperature and humidity profiles. Results are reported from laboratory experiments on candidate sandstones and caprocks. Conclusions are drawn, but further verification must be done in the field.

Decoupled equations for reverse time migration in tilted transversely isotropic media

KAUST Repository

Zhan, Ge; Pestana, Reynam C.; Stoffa, Paul L.

2012-01-01

Conventional modeling and migration for tilted transversely isotropic (TTI) media may suffer from numerical instabilities and shear wave artifacts due to the coupling of the P-wave and SV-wave modes in the TTI coupled equations. Starting with the separated P- and SV-phase velocity expressions for vertical transversely isotropic (VTI) media, we extend these decoupled equations for modeling and reverse time migration (RTM) in acoustic TTI media. Compared with the TTI coupled equations published in the geophysical literature, the new TTI decoupled equations provide a more stable solution due to the complete separation of the P-wave and SV-wave modes. The pseudospectral method is the most convenient method to implement these equations due to the form of wavenumber expressions and has the added benefit of being highly accurate and thus avoiding numerical dispersion. The rapid expansion method (REM) in time is employed to produce a broad band numerically stable time evolution of the wavefields. Synthetic results validate the proposed TTI decoupled equations and show that modeling and RTM in TTI media with the decoupled equations remain numerically stable even for models with strong anisotropy and sharp contrasts. © 2012 Society of Exploration Geophysicists.

Decoupled equations for reverse time migration in tilted transversely isotropic media

KAUST Repository

Zhan, Ge

2012-03-01

Conventional modeling and migration for tilted transversely isotropic (TTI) media may suffer from numerical instabilities and shear wave artifacts due to the coupling of the P-wave and SV-wave modes in the TTI coupled equations. Starting with the separated P- and SV-phase velocity expressions for vertical transversely isotropic (VTI) media, we extend these decoupled equations for modeling and reverse time migration (RTM) in acoustic TTI media. Compared with the TTI coupled equations published in the geophysical literature, the new TTI decoupled equations provide a more stable solution due to the complete separation of the P-wave and SV-wave modes. The pseudospectral method is the most convenient method to implement these equations due to the form of wavenumber expressions and has the added benefit of being highly accurate and thus avoiding numerical dispersion. The rapid expansion method (REM) in time is employed to produce a broad band numerically stable time evolution of the wavefields. Synthetic results validate the proposed TTI decoupled equations and show that modeling and RTM in TTI media with the decoupled equations remain numerically stable even for models with strong anisotropy and sharp contrasts. © 2012 Society of Exploration Geophysicists.

Evaluating the effects of a youth health media campaign.

Science.gov (United States)

Beaudoin, Christopher E; Thorson, Esther

2007-01-01

This article examines the impact of a socially oriented public health media campaign that aims to influence social indicators among adults as a means to advances in youth health outcomes. Hierarchical regression analyses are conducted on telephone survey data from 18 weekly telephone surveys of adults in Kansas. Media campaign exposure was positively associated with two outcome measures: beliefs about youth development and behaviors toward youth development. In addition, these two outcome measures increased significantly over time, with the dissemination of the campaign's television and newspaper advertisements. Furthermore, these over-time increases were present only among respondents who were exposed to the media campaign. These findings offer support for the campaign's influence on the two social indicators, which would, per other research, be expected to influence improvements in youth health. Findings are discussed in reference to previous research in the areas of public health and mass communication, with implications made for practitioners and researchers.

Cryo magnetic separation adaptation to environment technologies: application to industrial effluents; Adaptation de la separation cryomagnetique aux technologies de l`environnement: application a l`epuration d`effluents liquides industriels

Energy Technology Data Exchange (ETDEWEB)

Bureau, V

1993-12-20

Cryomagnetic separation adaptation to environment technologies application to industrial liquid effluents. The performance, obtained by superconducting high filed - high gradient magnetic separation, permitted to foresee the magnetic treatment of heavy metals in rinse waters, derived from the surface finishing industry. The paramagnetic ions, precipitated in basic media as hydroxides, present a very hydrated amorphous structure, which masks their subjacent magnetic properties. Coprecipitation of a `magnetic carrier`, jointly with the heavy metals, has been studied: ferric chloride forms in basic media, an hydrated iron oxide. Its structure is of the goethite type, and it stabilizes as hematite. The magnetic susceptibility of the obtained product is still weak and its crystalline structure is not enough affirmative to utilize magnetic filtration with efficiency. Mixture of ferrous sulphate and ferric chloride forms, in a basic media, an hydrated magnetite. Initial ideal ratio between divalent iron and trivalent iron, varies between 0,5 and 1,2. This mixture, coprecipitated with the heavy metals, permits to optimize the magnetic cleaning of the fluids in a high field - high gradient filter. (author)

Did we make it to the news? Effects of actual and perceived media coverage on media orientations of communication professionals

NARCIS (Netherlands)

Jacobs, S.; Wonneberger, A.

The aim of this study is to assess the mass media orientations of communication professionals: Is past media coverage for their organization related to the way communication professionals currently evaluate the importance of the media for their organizations? Following the debates on mediatization

Reference mean temperature for evaluation of performance of thermal diffusion column for isotope separation

International Nuclear Information System (INIS)

Yamamoto, Ichiro; Kanagawa, Akira

1987-01-01

In order to evaluate separative performance of a thermal diffusion column, a simplification is usually made in which the temperature dependence of the relevant properties such as thermal diffusion constant is ignored and some proper mean values evaluated at a specific ''mean'' temperature are used. Adoption of weighted average of temperature distribution is common for the ''mean'' temperature, but there exists no definite way of determining mean temperature. The present paper proposes a new reference mean temperature determined by the equation governing the free convection. It is based on the fact that the multiplication effect of free convection is essential to separation by thermal diffusion column. The reference mean temperature is related to pressure difference between top and bottom of column and is higher than a mass-averaged temperature (due to gravitational force) by a contribution of viscous force. The reference mean temperature was calculated, as a reference, for an Ar isotope separating column with an inner hot radius of 0.2 mm and an outer cold radius of 5 mm. The results confirmed the validity of an approximate formula expressing effects of temperature difference and ratio of inner and outer radii of column explicitly for the temperature. The reference mean temperature calculated from pressure difference given by axisymmetric solution of equations of change was in good agreement with the analytical solution. (author)

Evaluation of Periodontal Ligament Cell Viability in Three Different Storage Media: An in Vitro Study

Directory of Open Access Journals (Sweden)

Meenakshi Sharma

2016-01-01

Full Text Available Objectives: This study was undertaken to evaluate the viability of periodontal ligament (PDL cells of avulsed teeth in three different storage media.Materials and Methods: Forty-five premolars extracted for orthodontic therapeutic purposes were randomly and equally divided into three groups based on storage media used [Group I: milk (control; Group II: aloe vera (experimental; Group III: egg white (experimental]. Following extractions, the teeth were placed in one of the three different storage media for 30 minutes, following which the scrapings of the PDL from these teeth were collected in Falcon tubes containing collagenase enzyme in 2.5 mL of phosphate buffered saline. The tubes were subsequently incubated for 30 minutes and centrifuged for five minutes at 800 rpm. The obtained PDL cells were stained with Trypan Blue and were observed under optical microscope. The percentage of viable cells was calculated.Results: Aloe vera showed the highest percentage of viable cells (114.3±8.0, followed by egg white (100.9±6.3 and milk (101.1±7.3.Conclusion: Within the limitations of this study, it appears that aloe vera maintains PDL cell viability better than egg white or milk.

The evaluation of the transformation of government public relations in the new media era

OpenAIRE

Hasnawati, Siti; Salamah, Ummi

2017-01-01

New media creates ways to interact between government and relevant stakeholders. Nowadays, public have an opportunity to participate and engage in direct dialogue with the government. This research applied qualitative methodology with case study on The Audit Board of The Republic of Indonesia (BPK RI). Aimed to evaluate the implementation of the transformation of government public relations performed by Public Relations and International Cooperation Bureau, The Audit Board of the Republic Ind...

Final Evaluation of Assignment: Media Literacy. A Report to the Discovery Channel.

Science.gov (United States)

Kubey, Robert; Serafin, Gina Marcello

The Assignment: Media Literacy curriculum is a 6-module media literacy curriculum developed by Renee Hobbs of Babson College and her staff in collaboration with the Discovery Channel. There are three versions of Assignment: Media Literacy, one for elementary school students, one for middle school students, and one for high school students. Close…

Abnormal gel flotation caused by contrast media during adrenal vein sampling.

Science.gov (United States)

Lima-Oliveira, Gabriel; Lippi, Giuseppe; Salvagno, Gian Luca; Gelati, Matteo; Bassi, Antonella; Contro, Alberto; Pizzolo, Francesca; Guidi, Gian Cesare

2016-10-15

During adrenal venous sampling (AVS) procedure, radiologists administer a contrast agent via the catheter to visualize the proper catheter position. A patient with primary aldosteronism diagnostic-hypothesis was admitted for AVS. A venogram was performed to
confirm the catheter's position with 2mL of Iopamidol 300 mg/mL. Samples were collected with syringe connected to a hydrophilic coated catheter by low-pressure aspiration from each of the four collection sites: inferior vena cava in the suprarenal portion, inferior vena cava in the infrarenal portion, left adrenal vein, and right adrenal vein; then immediately transferred from syringe to tubes with gel separator. All tubes were centrifuged at 1200 x g for 10 minutes. At the end of centrifugation process, primary blood tubes containing blood from inferior vena cava and left adrenal vein exhibited the standard gel separator barrier, while tubes from right adrenal vein showed abnormal flotation of gel separator. The radiologist confirmed the usage of 2.6 mL instead of 2.0 mL of Iopamidol 300 mg/mL. This iodinated contrast media, with 1.33 g/cm 3 of density, was used close to the right adrenal vein due to some difficulty to access it. The abnormal flotation of gel separator in samples taken from right adrenal vein can be explained by the usage of the iodinated
contrast media. We suggest using plain-tubes (without gel separator) for AVS in order to avoid preanalytical nonconformities. Moreover, a blood volume equivalent to twice the catheter extension should be discarded to eliminate residual contrast media before collection of samples for laboratory assays.

Evaluation of a mass media campaign promoting using help to quit smoking.

Science.gov (United States)

Gibson, Laura A; Parvanta, Sarah A; Jeong, Michelle; Hornik, Robert C

2014-05-01

Although there is evidence that promoting individual cessation aids increases their utilization, mass media campaigns highlighting the benefit of using help to quit have not been evaluated. The effects of a Philadelphia adult smoking-cessation media campaign targeting using help in ad taglines were analyzed from March to November 2012. This study distinctively analyzed the campaign's impact at both the population level (effects on the average person) and the individual level (effects among those who reported exposure). The 16-month mass media campaign aired in Philadelphia PA from December 2010 to March 2012. A representative sample of adult Philadelphia smokers was interviewed by telephone at baseline (n=491) and new samples were interviewed monthly throughout the campaign (n=2,786). In addition, a subsample of these respondents was reinterviewed 3 months later (n=877). On average, participants reported seeing campaign ads four times per week. Among individual respondents, each additional campaign exposure per week increased the likelihood of later reporting using help (OR=1.08, p<0.01), adjusting for baseline use of help and other potential confounders. This corresponded to a 5% increase in the use of help for those with average exposure relative to those with no exposure. Cross-sectional associations between individual campaign exposure and intentions to use help were consistent with these lagged findings. However, there was no evidence of population-level campaign effects on use of help. Although the campaign was effective at the individual level, its effects were too small to have a population-detectable impact. Copyright © 2014 American Journal of Preventive Medicine. Published by Elsevier Inc. All rights reserved.

Effects of two types of medical contrast media on routine chemistry results by three automated chemistry analyzers.

Science.gov (United States)

Park, Yu Jin; Rim, John Hoon; Yim, Jisook; Lee, Sang-Guk; Kim, Jeong-Ho

2017-08-01

The use of iodinated contrast media has grown in popularity in the past two decades, but relatively little attention has been paid to the possible interferential effects of contrast media on laboratory test results. Herein, we investigate medical contrast media interference with routine chemistry results obtained by three automated chemistry analyzers. Ten levels of pooled serum were used in the study. Two types of medical contrast media [Iopamiro (iopamidol) and Omnipaque (iohexol)] were evaluated. To evaluate the dose-dependent effects of the contrast media, iopamidol and iohexol were spiked separately into aliquots of serum for final concentrations of 1.8%, 3.6%, 5.5%, 7.3%, and 9.1%. The 28 analytes included in the routine chemistry panel were measured by using Hitachi 7600, AU5800, and Cobas c702 analyzers. We calculated the delta percentage difference (DPD) between the samples and the control, and examined dose-dependent trends. When the mean DPD values were compared with the reference cut-off criteria, the only uniformly interferential effect observed for all analyzers was in total protein with iopamidol. Two additional analytes that showed trends toward interferential effects only in few analyzers and exceeded the limits of the allowable error were the serum iron and the total CO 2 . The other combinations of analyzer and contrast showed no consistent dose-dependent propensity for change in any analyte level. Our study suggests that many of the analytes included in routine chemistry results, except total protein and serum iron, are not significantly affected by iopamidol and iohexol. These results suggest that it would be beneficial to apply a flexible medical evaluation process for patients requiring both laboratory tests and imaging studies, minimizing the need for strict regulations for sequential tests. Copyright © 2017 The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.

The geochemical aspect for the evaluations of radioelements transfers in subterranean porous media

International Nuclear Information System (INIS)

Rancon, Daniel.

1978-10-01

Radiological safety studies upon radioactivity transfers in soils and subterranean waters need geochemical studies to evaluate the retention of radionuclides by the solid matrix of porous media. The interaction between radionuclides water and substratum allow determination of the retention term in the transfer equation and estimation of relative speeds of the pollutant and the water which carries it. The retention, characterized by the distribution coefficient or by the soption isotherms, can be due to several mechanisms: precipitation, adsorption, ions exchange which have to be determined because they introduce the important concepts of reversibility, irreversible fixation and saturation. Retention is a function of various factors which can have a great influence: temperature, nature and texture of the solid, composition and pH of the solution, presence of complexing agent. This report is illustrated by original examples chosen among well know elements (Cs, Sr) and mainly among less studied elements (Co, Ba, Ra, U, Th, Np, Pu). Recommendations are proposed to make these transfer measurements more realistic and more adapted to the natural conditions of subterranean media [fr

Media Education Initiatives by Media Organizations: The Uses of Media Literacy in Hong Kong Media

Science.gov (United States)

Chu, Donna; Lee, Alice Y. L.

2014-01-01

As more media organizations have engaged in media education, this paper investigates the goals and practices of these activities. This article coins media education initiatives by media organizations with the term "media-organization media literac"y (MOML). Four MOML projects in Hong Kong were selected for examination. Built on critical…

Social media usage among health care providers.

Science.gov (United States)

Surani, Zoya; Hirani, Rahim; Elias, Anita; Quisenberry, Lauren; Varon, Joseph; Surani, Sara; Surani, Salim

2017-11-29

The objective of this study was to evaluate the use of social media among healthcare workers in an attempt to identify how it affects the quality of patient care. An anonymous survey of 35 questions was conducted in South Texas, on 366 healthcare workers. Of the 97% of people who reported owning electronic devices, 87.9% indicated that they used social media. These healthcare workers indicated that they spent approximately 1 h on social media every day. The healthcare workers below the age of 40 were more involved in social media compared to those above 40 (p social media among physicians and nurses was noted to be identical (88% for each group), and both groups encouraged their patients to research their clinical conditions on social media (p social media policy in their hospital compared to nurses (p < 0.05). However, a large proportion of healthcare workers (40%) were unaware of their workplace policy, which could potentially cause a privacy breach of confidential medical information. Further studies are required to evaluate specific effects of these findings on the quality of patient care.

Statistical mechanics of dense granular media

International Nuclear Information System (INIS)

Coniglio, A; Fierro, A; Nicodemi, M; Ciamarra, M Pica; Tarzia, M

2005-01-01

We discuss some recent results on the statistical mechanics approach to dense granular media. In particular, by analytical mean field investigation we derive the phase diagram of monodisperse and bidisperse granular assemblies. We show that 'jamming' corresponds to a phase transition from a 'fluid' to a 'glassy' phase, observed when crystallization is avoided. The nature of such a 'glassy' phase turns out to be the same as found in mean field models for glass formers. This gives quantitative evidence for the idea of a unified description of the 'jamming' transition in granular media and thermal systems, such as glasses. We also discuss mixing/segregation transitions in binary mixtures and their connections to phase separation and 'geometric' effects

“Tonight’s Secret Ingredient Is...”: Iron Chef America as Media Ritual

OpenAIRE

Christopher Bell

2010-01-01

The Food Network program Iron Chef America creates a media ritual space in which public displays of virtuosity and the engendering of parasocial relationships combine to present both the media ritual itself (the cooking competition) and the media ritual it engenders (the viewing of and parasocial interaction with the cooking competition). These rituals though separate and distinct are inextricably tied together. Couched in the ritual tropes and memes of sporting events, Iron Chef America is a...

One Health in social networks and social media.

Science.gov (United States)

Mekaru, S R; Brownstein, J S

2014-08-01

In the rapidly evolving world of social media, social networks, mobile applications and citizen science, online communities can develop organically and separately from larger or more established organisations. The One Health online community is experiencing expansion from both the bottom up and the top down. In this paper, the authors review social media's strengths and weaknesses, earlier work examining Internet resources for One Health, the current state of One Health in social media (e.g. Facebook, Twitter, YouTube) and online social networking sites (e.g. LinkedIn and ResearchGate), as well as social media in One Health-related citizen science projects. While One Health has a fairly strong presence on websites, its social media presence is more limited and has an uneven geographic distribution. In work following the Stone Mountain Meeting,the One Health Global Network Task Force Report recommended the creation of an online community of practice. Professional social networks as well as the strategic use of social media should be employed in this effort. Finally, One Health-related research projects using volunteers (citizen science) often use social media to enhance their recruitment. Including these researchers in a community of practitioners would take full advantage of their existing social media presence. In conclusion, the interactive nature of social media, combined with increasing global Internet access, provides the One Health community with opportunities to meaningfully expand their community and promote their message.

Social media in otolaryngology-head and neck surgery.

Science.gov (United States)

Oyewumi, Modupe; Lee, John; Vescan, Allan

2017-09-01

The objective of this study was to assess the current use of social media tools within Canadian otolaryngology-head and neck surgery (OHNS) programs and to assess the interest within these programs to integrate social media for networking, social, and educational programs. A prospective study from September 2013 to February 2014 was performed involving residents and faculty in Canadian OHNS programs. A 26-item questionnaire was created and sent to staff and resident physicians who met the study inclusion criteria using an online survey tool (http://surveymonkey.com). There were 101 respondents for a 10% response rate. More than half (58.4%) of respondents reported use of social media for personal and/or professional matters. Residents and junior faculty physicians 39 years and younger were more likely to have social media accounts and used them more frequently than their older counterparts. Among staff physicians, pediatric otolaryngologists had the highest rate of use, and otologists exhibited the lowest rate. Cellular phones were the most commonly used devices to access social media sites. Fewer than 35% of social media users failed to separate their personal and professional accounts. Although OHNS trainees and practicing physicians identified the potential benefits of social media tools in their specialty, most were unsure how to apply these tools to their practice. Ours is the first study to assess social media use in OHNS. Otolaryngologists are currently using social media; however, their application as a communication and educational tool in otolaryngology remains to be defined.

Multisided Media Markets: Applying the Theory of Multisided Markets to Media Markets

OpenAIRE

Nadine Lindstädt

2009-01-01

Media markets recently have been identified as multisided markets. The application of the theory of multisided markets provides a better understanding of such markets. It enriched the hitherto economic approach and led to new insights and perspectives especially for the antitrust authorities when evaluating competition constraints and mergers. This paper reviews the theory of multisided markets and subsequently applies it to media markets. Finally the paper draws attention to the new perspect...

SOCIAL MEDIA INTELLIGENCE: OPPORTUNITIES AND LIMITATIONS

Directory of Open Access Journals (Sweden)

Adrian Liviu IVAN

2015-09-01

Full Text Available An important part of the reform of the intelligence community is felt in the opening linked with the widening spectrum of methods and spaces which can be used to collect and analyse dates and information. One of these methods that produce large mutations in the system is connected to the world of social media which proves to be a huge source of information. Social Media Intelligence (SOCMINT, the newest member of the family INT's, is undoubtedly a separate domain, a practice rooted in the work of the intelligence community. This paper proposes a general characterization of the most important aspects of Social Media Intelligence, a brand new way for the intelligence community to collect and analyse information for national security purposes (but not only in the context of the current global challenges. Moreover, the work is focused in identifying the further limitations and opportunities of this practice in the upcoming decade.

Harnessing emotional connections to improve financial decisions : evaluating the impact of financial education in mainstream media

OpenAIRE

Berg,Gunhild; Zia,Bilal Husnain

2013-01-01

This paper exploits the emotional connections and viewer attentiveness of mainstream media to evaluate the economic impact of financial education messages on debt management delivered through a popular television soap opera in South Africa. The study uses a symmetric encouragement design to compare outcomes of individuals who were randomly assigned to watch a soap opera with financial mess...

An evaluation of the use of oral contrast media in abdominopelvic CT

Energy Technology Data Exchange (ETDEWEB)

Buttigieg, Erica Lauren; Cortis, Kelvin; Galea Soler, Sandro [Mater Dei Hospital, Medical Imaging Department, Msida (Malta); Borg Grima, Karen; Zarb, Francis [Mater Dei Hospital, Faculty of Health Sciences, Msida (Malta)

2014-11-15

To evaluate the diagnostic efficacy of different oral contrast media (OCM) for abdominopelvic CT examinations performed for follow-up general oncological indications. The objectives were to establish anatomical image quality criteria for abdominopelvic CT; use these criteria to evaluate and compare image quality using positive OCM, neutral OCM and no OCM; and evaluate possible benefits for the medical imaging department. Forty-six adult patients attending a follow-up abdominopelvic CT for general oncological indications and who had a previous abdominopelvic CT with positive OCM (n = 46) were recruited and prospectively placed into either the water (n = 25) or no OCM (n = 21) group. Three radiologists performed absolute visual grading analysis (VGA) to assess image quality by grading the fulfilment of 24 anatomical image quality criteria. Visual grading characteristics (VGC) analysis of the data showed comparable image quality with regards to reproduction of abdominal structures, bowel discrimination, presence of artefacts, and visualization of the amount of intra-abdominal fat for the three OCM protocols. All three OCM protocols provided similar image quality for follow-up abdominopelvic CT for general oncological indications. (orig.)

An evaluation of the use of oral contrast media in abdominopelvic CT

International Nuclear Information System (INIS)

Buttigieg, Erica Lauren; Cortis, Kelvin; Galea Soler, Sandro; Borg Grima, Karen; Zarb, Francis

2014-01-01

To evaluate the diagnostic efficacy of different oral contrast media (OCM) for abdominopelvic CT examinations performed for follow-up general oncological indications. The objectives were to establish anatomical image quality criteria for abdominopelvic CT; use these criteria to evaluate and compare image quality using positive OCM, neutral OCM and no OCM; and evaluate possible benefits for the medical imaging department. Forty-six adult patients attending a follow-up abdominopelvic CT for general oncological indications and who had a previous abdominopelvic CT with positive OCM (n = 46) were recruited and prospectively placed into either the water (n = 25) or no OCM (n = 21) group. Three radiologists performed absolute visual grading analysis (VGA) to assess image quality by grading the fulfilment of 24 anatomical image quality criteria. Visual grading characteristics (VGC) analysis of the data showed comparable image quality with regards to reproduction of abdominal structures, bowel discrimination, presence of artefacts, and visualization of the amount of intra-abdominal fat for the three OCM protocols. All three OCM protocols provided similar image quality for follow-up abdominopelvic CT for general oncological indications. (orig.)

Activity coefficients of plutonium and cerium in liquid gallium at 1073 K: Application to a molten salt/solvent metal separation concept

International Nuclear Information System (INIS)

Lambertin, David; Ched'homme, Severine; Bourges, Gilles; Sanchez, Sylvie; Picard, Gerard S.

2005-01-01

Activity coefficients in liquid metal and salt phases are important parameters for predicting the separation efficiency of reductive extraction or electrochemical pyrochemical processes. The electrochemical properties of Ce and Pu in gallium metal and chlorides media - CaCl 2 and equimolar NaCl-KCl - have been studied at 1073 K. Cyclic voltammetry and chronoamperometry show the thermodynamic feasibility of using gallium as solvent metal for pyrochemical processes involving Pu and Ce. The activity coefficient of Pu in liquid Ga (log(γ Pu,Ga ) = -7.3 ± 0.5) is deduced from the results and is a basis of assessing the potential for using liquid metals in pyrochemical separation of actinides and lanthanides. Evaluation of literature data for Al, Bi and Cd suggests that Ga is most favorable for selective separation of Pu from Ce near 1073 K

Multisided Media Markets

DEFF Research Database (Denmark)

Lindstädt, Nadine

Media markets recently have been identified as multisided markets. The application of the theory of multisided markets provides a better understanding of such markets. It enriched the hitherto economic approach and led to new insights and perspectives especially for the antitrust authorities when...... evaluating competition constraints and mergers. This paper reviews the theory of multisided markets and subsequently applies it to media markets. Finally the paper draws attention to the new perspectives and insights the theory provides but also brings open research questions to light....

The evaluation of the angles of Eustachian tubes in the patients with chronic otitis media on the temporal computerized tomography.

Science.gov (United States)

Aksoy, S; Sayin, I; Yazici, Z M; Kayhan, F T; Karahasanoglu, A; Hocaoglu, E; Inci, E

2016-01-01

Chronic otitis media (COM), affecting all over the world and in a wide range of age groups in Turkey, is an important cause of ear discharge and hearing loss. The main clinical manifestations are tympanic membrane perforation, ear, nose and throat problems. On the tympanic membrane perforation becomes persistent and cholesteatoma development, there are a lot of opinions today. Especially in the pathology associated with otitis media with effusion eustachian tube, it is known that COM and cholesteatoma develop. In our study, we interpreted 210 patients' temporal computed tomography (CT). Seventy of these 210 patients had otitis media with cholesteatoma, 70 patients had only otitis media without cholesteatoma, and 70 patients had no otitis media. The eustachian tubes were evaluated using temporal CT multiplanar reconstruction method. Angles with the horizontal plane of the eustachian tube and Reid and tubotympanic angles were measured. The angles between eustachian tube and horizontally oriented Reid plane of the patients with cholesteatoma were found to be significantly lower than the patients with otitis media without cholesteatoma and the patients with no history of otitis media. For the tubotympanic angle, no statistically significant differences were observed between the groups. These results suggest that the decrease in the angle with the horizontal plane of Reid in the eustachian tube in adults may play a significant role in the etiology of cholesteatoma.

Correlated Photon Dynamics in Dissipative Rydberg Media

Science.gov (United States)

Zeuthen, Emil; Gullans, Michael J.; Maghrebi, Mohammad F.; Gorshkov, Alexey V.

2017-07-01

Rydberg blockade physics in optically dense atomic media under the conditions of electromagnetically induced transparency (EIT) leads to strong dissipative interactions between single photons. We introduce a new approach to analyzing this challenging many-body problem in the limit of a large optical depth per blockade radius. In our approach, we separate the single-polariton EIT physics from Rydberg-Rydberg interactions in a serialized manner while using a hard-sphere model for the latter, thus capturing the dualistic particle-wave nature of light as it manifests itself in dissipative Rydberg-EIT media. Using this approach, we analyze the saturation behavior of the transmission through one-dimensional Rydberg-EIT media in the regime of nonperturbative dissipative interactions relevant to current experiments. Our model is able to capture the many-body dynamics of bright, coherent pulses through these strongly interacting media. We compare our model with available experimental data in this regime and find good agreement. We also analyze a scheme for generating regular trains of single photons from continuous-wave input and derive its scaling behavior in the presence of imperfect single-photon EIT.

Actinide-Lanthanide separation by an electrolytic method in molten salt media: feasibility assessment of a renewed liquid cathode

International Nuclear Information System (INIS)

Huguet, A.

2009-12-01

This study is part of a research program concerning the assessment of pyrochemical methods for the nuclear waste processing. The An-Ln partitioning could be achieved by an electrolytic selective extraction in molten salt media. It has been decided to focus on liquid reactive cathode which better suits to a group actinides co-recycling. The aim of the study is to propose, define and initiate the development of an electrolytic pyro-process dedicated to the quantitative and selective recovery of the actinides. Quantitativeness is related to technology, whereas selectivity is governed by chemistry. The first step consisted in selecting the adequate operating conditions, which enables a sufficient An-Ln separation. The first step consisted, by means of thermodynamic calculi and electrochemical investigations, in selecting a promising combination between molten electrolyte and cathodic material, regarding the process constraints. To improve the recovery yield, it is necessary to develop a disruptive technology: here comes the concept of a dynamic electrodeposition carried out onto liquid metallic drops. The next step consisted in designing and manufacturing a lab-scale device which enables dropping flow studies. Since interfacial phenomena are of primary meaning in such a concept, it has been decided to focus on high temperature liquid-liquid interfacial measurements. (author)

Evaluation of the separation and purification of 227Th from its decay progeny by anion exchange and extraction chromatography

International Nuclear Information System (INIS)

Ivanov, P.I.; Collins, S.M.; Es, E.M. van; García-Miranda, M.; Jerome, S.M.; Russell, B.C.

2017-01-01

Thorium-227 is currently undergoing evaluation as a potential radionuclide for targeted cancer therapy, and as such a high chemical purity of the material is required. To establish a reliable procedure for radiochemical isolation of 227 Th from the parent 227 Ac and decay progeny, which includes the radiotherapeutic 223 Ra, the performance of three different separation schemes based on ion-exchange and extraction chromatography have been evaluated. The results suggest that both ion exchange and extraction chromatographic techniques can be successfully used for the separation of 227 Th from its decay progeny, however extraction chromatographic resins demonstrate favourable performance in terms of Th recovery and purification from radionuclide impurities. - Highlights: • Development of a radiochemical separation of 227 Th from residual 227Ac as well as from decay progeny. • Evaluation of ion-exchange and extraction chromatography techniques. • TEVA resin demonstrates favourable performance in terms of Th recovery and purification. • Developed method is applicable to both nuclear medicine and environmental analysis.

Evaluation of the effect of media velocity on filter efficiency and most penetrating particle size of nuclear grade high-efficiency particulate air filters.

Science.gov (United States)

Alderman, Steven L; Parsons, Michael S; Hogancamp, Kristina U; Waggoner, Charles A

2008-11-01

High-efficiency particulate air (HEPA) filters are widely used to control particulate matter emissions from processes that involve management or treatment of radioactive materials. Section FC of the American Society of Mechanical Engineers AG-1 Code on Nuclear Air and Gas Treatment currently restricts media velocity to a maximum of 2.5 cm/sec in any application where this standard is invoked. There is some desire to eliminate or increase this media velocity limit. A concern is that increasing media velocity will result in higher emissions of ultrafine particles; thus, it is unlikely that higher media velocities will be allowed without data to demonstrate the effect of media velocity on removal of ultrafine particles. In this study, the performance of nuclear grade HEPA filters, with respect to filter efficiency and most penetrating particle size, was evaluated as a function of media velocity. Deep-pleat nuclear grade HEPA filters (31 cm x 31 cm x 29 cm) were evaluated at media velocities ranging from 2.0 to 4.5 cm/sec using a potassium chloride aerosol challenge having a particle size distribution centered near the HEPA filter most penetrating particle size. Filters were challenged under two distinct mass loading rate regimes through the use of or exclusion of a 3 microm aerodynamic diameter cut point cyclone. Filter efficiency and most penetrating particle size measurements were made throughout the duration of filter testing. Filter efficiency measured at the onset of aerosol challenge was noted to decrease with increasing media velocity, with values ranging from 99.999 to 99.977%. The filter most penetrating particle size recorded at the onset of testing was noted to decrease slightly as media velocity was increased and was typically in the range of 110-130 nm. Although additional testing is needed, these findings indicate that filters operating at media velocities up to 4.5 cm/sec will meet or exceed current filter efficiency requirements. Additionally

PENGEMBANGAN MEDIA PAPAN PERMAINAN PANJAT PINANG

Directory of Open Access Journals (Sweden)

Desty Triastuti

2017-10-01

Full Text Available Media is a very important component in the learning process. Media can be used as a toll for learning, that can be easy for the teachers to learn of the material, and at the same time can be facilitate the students to accepting and understanding of the material.  The purpose of this study is to produce the product that are specialized media to help the process of thematic learning. This media serves as a tool for stimulate memory recall and reinforce the material in students of fifth grade in elementary school. The media called board games panjat pinang has been validated on the the content and design, next then tried out on one to one evaluation, 6 students on small group evaluation and 23 students on field trial. The results of the tryouts indicating the level of feasibility of teaching materials is very high. The average validity is 90,025, attractiveness 91,80, effectiveness of 92,75, and practicality 92,18, so that media announced eligible and effective for use in thematic learning especially for matter circulatory systems human and animal. Media memiliki peranan yang sangat penting dalam proses pembelajaran. Media dapat dijadikan sebagai alat bantu belajar yang dapat memudahkan guru dalam penyampain materi sekaligus memudahkan siswa dalam menerima dan memahami materi.  Tujuan penelitian ini adalah menghasilkan produk media papan permainan panjat pinang untuk pembelajaran tematik. Media ini berfungsi sebagai alat bantu menstimulasi daya ingat dan penguatan materi bagi siswa kelas V SD. Media divalidasi pada aspek isi dan desain, diujicobakan kepada satu orang siswa pada uji coba perorangan, enam siswa pada uji coba kelompok kecil dan 23 siswa pada uji coba lapangan. Hasil uji coba menunjukkan tingkat kevalidan sangat tinggi. Rata-rata kevalidan 87,7, kepraktisan 90,55, kemenarikan 92,22, dan keefektifan 91,0. Berdasarkan skor perolehan tersebur, media dinyatakan layak dan efektif untuk digunakan di dalam pembelajaran tematik, �

Media Komunitas dan Media Literacy

Directory of Open Access Journals (Sweden)

Pawito .

2013-12-01

Full Text Available Abstract:This essay deals with community media in relation to media literacy. After a short discussion on a number of community media characters is made the essay goes further with somewhat detail theoretical presumptions of the roles of media community with respect primarily to the development as Amartya Sen mentioned about. The author suggests that community media may play some significant roles in the development including (a disseminating information (from varieties of perspective, (b facilitating public discussion, (c helping to reach solutions of problems, (d encouraging participations, and (e encouraging the development of media literacy. Regarding the last point the author remarks that media community may have a dual-roles i.e facilitating community’s member in media participation and facilitating community’s member in media education.

Magnetic separation of algae genetically modified for increased intracellular iron uptake

Energy Technology Data Exchange (ETDEWEB)

Buck, Amy [Case Western Reserve University, Cleveland, OH (United States); Cleveland Clinic, Cleveland, OH (United States); Moore, Lee R. [Cleveland Clinic, Cleveland, OH (United States); Lane, Christopher D.; Kumar, Anil; Stroff, Clayton; White, Nicolas [Phycal Inc., Cleveland, OH (United States); Xue, Wei; Chalmers, Jeffrey J. [The Ohio State University, Columbus, OH (United States); Zborowski, Maciej, E-mail: zborowm@ccf.org [Cleveland Clinic, Cleveland, OH (United States)

2015-04-15

Algae were investigated in the past as a potential source of biofuel and other useful chemical derivatives. Magnetic separation of algae by iron oxide nanoparticle binding to cells has been proposed by others for dewatering of cellular mass prior to lipid extraction. We have investigated feasibility of magnetic separation based on the presence of natural iron stores in the cell, such as the ferritin in Auxenochlorella protothecoides (A. protothecoides) strains. The A. protothecoides cell constructs were tested for inserted genes and for increased intracellular iron concentration by inductively coupled plasma atomic absorption (ICP–AA). They were grown in Sueoka’s modified high salt media with added vitamin B1 and increasing concentration of soluble iron compound (FeCl{sub 3} EDTA, from 1× to 8× compared to baseline). The cell magnetic separation conditions were tested using a thin rectangular flow channel pressed against interpolar gaps of a permanent magnet forming a separation system of a well-defined fluid flow and magnetic fringing field geometry (up to 2.2 T and 1000 T/m) dubbed “magnetic deposition microscopy”, or MDM. The presence of magnetic cells in suspension was detected by formation of characteristic deposition bands at the edges of the magnet interpolar gaps, amenable to optical scanning and microscopic examination. The results demonstrated increasing cellular Fe uptake with increasing Fe concentration in the culture media in wild type strain and in selected genetically-modified constructs, leading to magnetic separation without magnetic particle binding. The throughput in this study is not sufficient for an economical scale harvest. - Highlights: • Auxenochlorella protothecoides algae were genetically modified for biofuel production. • Algal iron metabolism was sufficient for their label-less magnetic separation. • High magnetic field and low flow required make the separation scale-up uneconomical.

Magnetic separation of algae genetically modified for increased intracellular iron uptake

International Nuclear Information System (INIS)

Buck, Amy; Moore, Lee R.; Lane, Christopher D.; Kumar, Anil; Stroff, Clayton; White, Nicolas; Xue, Wei; Chalmers, Jeffrey J.; Zborowski, Maciej

2015-01-01

Algae were investigated in the past as a potential source of biofuel and other useful chemical derivatives. Magnetic separation of algae by iron oxide nanoparticle binding to cells has been proposed by others for dewatering of cellular mass prior to lipid extraction. We have investigated feasibility of magnetic separation based on the presence of natural iron stores in the cell, such as the ferritin in Auxenochlorella protothecoides (A. protothecoides) strains. The A. protothecoides cell constructs were tested for inserted genes and for increased intracellular iron concentration by inductively coupled plasma atomic absorption (ICP–AA). They were grown in Sueoka’s modified high salt media with added vitamin B1 and increasing concentration of soluble iron compound (FeCl 3 EDTA, from 1× to 8× compared to baseline). The cell magnetic separation conditions were tested using a thin rectangular flow channel pressed against interpolar gaps of a permanent magnet forming a separation system of a well-defined fluid flow and magnetic fringing field geometry (up to 2.2 T and 1000 T/m) dubbed “magnetic deposition microscopy”, or MDM. The presence of magnetic cells in suspension was detected by formation of characteristic deposition bands at the edges of the magnet interpolar gaps, amenable to optical scanning and microscopic examination. The results demonstrated increasing cellular Fe uptake with increasing Fe concentration in the culture media in wild type strain and in selected genetically-modified constructs, leading to magnetic separation without magnetic particle binding. The throughput in this study is not sufficient for an economical scale harvest. - Highlights: • Auxenochlorella protothecoides algae were genetically modified for biofuel production. • Algal iron metabolism was sufficient for their label-less magnetic separation. • High magnetic field and low flow required make the separation scale-up uneconomical

Over all separation factors for stable isotopes by gas centrifuge

International Nuclear Information System (INIS)

Chuntong Ying; Nie Yuguang; Zeng Shi; Shang Xiuyong; Wood, Houston G.

1999-01-01

The separation factor for the elements with molar wight differences, γ 0 , is an important characteristic parameter for separation of varied isotopes. Besides the dependence on construction parameters of the gas centrifuge it depends on many variables. Some of them are operation conditions, such as feeding flow rate F, pressure at wall p w , temperature T 0 and distribution temperature on the wall and others. Separation factor γ 0 depends on physical properties, such as molar weight M, viscosity μ, product of ρD, where ρ is density of working media and D is its diffusion coefficient. It was taken four examples: UF 6 , WF 6 , OsO 4 and Xe [ru

Social Media: Portrait of an Emerging Tool in Medical Education.

Science.gov (United States)

Roy, Durga; Taylor, Jacob; Cheston, Christine C; Flickinger, Tabor E; Chisolm, Margaret S

2016-02-01

The authors compare the prevalence of challenges and opportunities in commentaries and descriptive accounts versus evaluative studies of social media use in medical education. A previously published report of social media use in medical education provided an in-depth discussion of 14 evaluative studies, a small subset of the total number of 99 articles on this topic. This study used the full set of articles identified by that review, including the 58 commentaries and 27 descriptive accounts which had not been previously reported, to provide a glimpse into how emerging tools in medical education are initially perceived. Each commentary, descriptive account, and evaluative study was identified and compared on various characteristics, including discussion themes regarding the challenges and opportunities of social media use in medical education. Themes related to the challenges of social media use in medical education were more prevalent in commentaries and descriptive accounts than in evaluative studies. The potential of social media to affect medical professionalism adversely was the most commonly discussed challenge in the commentaries (53%) and descriptive accounts (63%) in comparison to technical issues related to implementation in the evaluative studies (50%). Results suggest that the early body of literature on social media use in medical education-like that of previous innovative education tools-comprises primarily commentaries and descriptive accounts that focus more on the challenges of social media than on potential opportunities. These results place social media tools in historical context and lay the groundwork for expanding on this novel approach to medical education.

Electrochemical behavior of uranyl in anhydrous polar organic media

Energy Technology Data Exchange (ETDEWEB)

Burn, Adam G.; Nash, Kenneth L. [Washington State Univ., Pullmann, WA (United States). Dept. of Chemistry

2017-09-01

Weak complexes between pentavalent and hexavalent actinyl cations have been reported to exist in acidic, non-complexing high ionic strength aqueous media. Such ''cation-cation complexes'' were first identified in the context of actinide-actinide redox reactions in acidic aqueous media relevant to solvent extraction-based separation systems, hence their characterization is of potential interest for advanced nuclear fuel reprocessing. This chemistry could be relevant to efforts to develop advanced actinide separations based on the upper oxidation states of americium, which are of current interest. In the present study, the chemical behavior of pentavalent uranyl was examined in non-aqueous, aprotic polar organic solvents (propylene carbonate and acetonitrile) to determine whether UO{sub 2}{sup +} cations generated at the reducing working electrode surface would interact with the UO{sub 2}{sup 2+} cations in the bulk phase to form cation-cation complexes in such media. In magnesium perchlorate media, the electrolyte adsorbed onto the working electrode surface and interfered with the uranyl reduction/diffusion process through an ECE (electron transfer/chemical reaction/electron transfer) mechanism. In parallel studies of uranyl redox behavior in tetrabutylammonium hexafluorophosphate solutions, an EC (electron transfer/chemical reaction) mechanism was observed in the cyclic voltammograms. Ultimately, no conclusive electrochemical evidence demonstrated uranyl cation-cation interactions in the non-aqueous, aprotic polar organic solvent solutions, though the results reported do not completely rule out the presence of UO{sub 2}{sup +}.UO{sub 2}{sup 2+} complexes.

A Case Study On Media Literacy Levels Of Secondary Students Who Attend Media Literacy Course

Directory of Open Access Journals (Sweden)

Erhan GÖRMEZ

2017-05-01

Full Text Available The aim of this study is to determine the media literacy levels of secondary school students who attend media literacy courses. In this qualitative study, interview method was used to gather required data. In this qualitative study, interview method was used to gather required data. The interviews were conducted with 10 secondary school students of grade 8 attending media literacy courses by using semi-structured interview forms developed by the researcher. The questions used in semi-structured interview forms were prepared considering the outcomes of Media Literacy program related to units in Media Literacy Lesson Teacher Guide Book such as What is Communication?, Mass Communication, Media, Television, Newspaper and the Internet. The data gathered through the student's interviews were analyzed by applying content analysis method. Having evaluated the research results, it was concluded that the students who attend Media Literacy courses have a bit data and skills as knowing what communication is, using media and knowing its functions, telling the difference between TV program sorts in terms of their functions, knowing smart signs and explanations and obeying them, knowing basic concepts about newspaper and knowing and applying basic concepts concerning internet usage.

Polymethacrylate-based monoliths as stationary phases for separation of biopolymers and immobilization of enzymes.

Science.gov (United States)

Martinović, Tamara; Josić, Djuro

2017-11-01

The experiences in the production and application of polymethacrylate-based monolithic supports, since their development almost thirty years ago, are presented. The main driving force for the development of new chromatographic supports was the necessity for the isolation and separation of physiologically active biopolymers and their use for therapeutic purposes. For this sake, a development of a method for fast separation, preventing denaturation and preserving their biological activity was necessary. Development of polysaccharide-based supports, followed by the introduction of polymer-based chromatographic media, is shortly described. This development was followed by the advances in monolithic media that are now used for both large- and small-scale separation of biopolymers and nanoparticles. Finally, a short overview is given about the applications of monoliths for sample displacement chromatography, resulting in isolation of physiologically active biomolecules, such as proteins, protein complexes, and nucleic acid, as well as high-throughput sample preparation for proteomic investigations. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Communications and Media Relations Officer | IDRC - International ...

International Development Research Centre (IDRC) Digital Library (Canada)

Brings to the attention of the Media Relations Advisor and/or Social Media Officer in ... Monitors, evaluates and reports on the effectiveness and influence of IDRC's social ... projects to promote research results among regional decision-makers.

Does Media Literacy Mitigate Risk for Reduced Body Satisfaction Following Exposure to Thin-Ideal Media?

Science.gov (United States)

McLean, Siân A; Paxton, Susan J; Wertheim, Eleanor H

2016-08-01

Exposure to thin-ideal media can contribute to increased body dissatisfaction in adolescent girls. Understanding the factors that may prevent or exacerbate the negative effects of media exposure on body dissatisfaction is important to facilitate prevention of these problems. This study evaluated the effects of exposure to thin-ideal media images on body image in three instructional set experimental conditions: appearance comparison, peer norms, and control. An important aim was to examine baseline levels of media literacy as a protective factor and trait thin-ideal internalization and trait upward appearance comparison as risk factors. Early adolescent girls (N = 246) completed baseline measures and 1 week later viewed thin-ideal media images, before and after which they rated their state body satisfaction. Participants in the appearance comparison instruction but not peer norms instruction condition had significantly reduced body satisfaction. Media literacy, particularly high levels of critical thinking, mitigated the negative effects of trait thin-ideal internalization and trait upward appearance comparison on body satisfaction outcomes. These findings provide evidence for the role of media literacy as a protective factor against the negative effects on body satisfaction of exposure to thin-ideal media images, and also provide evidence to support the development and implementation of media literacy-based body image interventions.

Carrot Cultivar Evaluation: Soilless Media vs. Hydroponics

OpenAIRE

Pinnock, Derek R.; Bugbee, Bruce

2002-01-01

Nine cultivars of carrots were grown in a growth chamber. Each cultivar was grown both in hydroponic and soil-less media root-zone for sixty days. Three 30L tubs were used for each root-zone treatment. Three cultivars were planted in each tub, initially at 180 plants m-2 then thinned to 90 plants m-2 on day 45.

Children's media policy.

Science.gov (United States)

Jordan, Amy B

2008-01-01

' ability to supervise their children's media use. Jordan concludes by considering the relevance and efficacy of today's media policy given the increasingly rapid pace of technological change. The need for research in informing and evaluating media policy, she says, has never been greater.

Smart surfaces with switchable superoleophilicity and superoleophobicity in aqueous media: Toward controllable oil/water separation

KAUST Repository

Zhang, L.; Zhang, Z.; Wang, Peng

2012-01-01

Advanced materials with surfaces that have controllable oil wettability when submerged in aqueous media have great potential for various underwater applications. Here we have developed smart surfaces on commonly used materials, including non

Corporate Evaluation in Banks - Development of a New Evaluation Model with the Special Focus on the Separation of the Value of Maturity Transformation

Directory of Open Access Journals (Sweden)

Svend Reuse

2011-01-01

Full Text Available Banks have to be handled differently in the theory of corporate evaluation. After a critical discussion of existing approaches of corporate evaluation, the following results can be stated: As banks generate value by an efficient liability side, gross methods do not lead to reliable results concerning a bank’s value. Further, the effects of maturity transformation have to be separated as they do not increase the value of banks. The model developed by the author takes these aspects into consideration. By an integrated usage of the market interest rate method and the usage of secure cash flows, the CAPM approach could be avoided. The model separates the treasury effects and quantifies the value of a bank in a more realistic way. The first empirical test shows that the model works in practice.

Evaluation of culture-based techniques and 454 pyrosequencing for the analysis of fungal diversity in potting media and organic fertilizers.

Science.gov (United States)

Al-Sadi, A M; Al-Mazroui, S S; Phillips, A J L

2015-08-01

Potting media and organic fertilizers (OFs) are commonly used in agricultural systems. However, there is a lack of studies on the efficiency of culture-based techniques in assessing the level of fungal diversity in these products. A study was conducted to investigate the efficiency of seven culture-based techniques and pyrosequencing for characterizing fungal diversity in potting media and OFs. Fungal diversity was evaluated using serial dilution, direct plating and baiting with carrot slices, potato slices, radish seeds, cucumber seeds and cucumber cotyledons. Identity of all the isolates was confirmed on the basis of the internal transcribed spacer region of the ribosomal RNA (ITS rRNA) sequence data. The direct plating technique was found to be superior over other culture-based techniques in the number of fungal species detected. It was also found to be simple and the least time consuming technique. Comparing the efficiency of direct plating with 454 pyrosequencing revealed that pyrosequencing detected 12 and 15 times more fungal species from potting media and OFs respectively. Analysis revealed that there were differences between potting media and OFs in the dominant phyla, classes, orders, families, genera and species detected. Zygomycota (52%) and Chytridiomycota (60%) were the predominant phyla in potting media and OFs respectively. The superiority of pyrosequencing over cultural methods could be related to the ability to detect obligate fungi, slow growing fungi and fungi that exist at low population densities. The evaluated methods in this study, especially direct plating and pyrosequencing, may be used as tools to help detect and reduce movement of unwanted fungi between countries and regions. © 2015 The Society for Applied Microbiology.

Stable lattice Boltzmann model for Maxwell equations in media

Science.gov (United States)

Hauser, A.; Verhey, J. L.

2017-12-01

The present work shows a method for stable simulations via the lattice Boltzmann (LB) model for electromagnetic waves (EM) transiting homogeneous media. LB models for such media were already presented in the literature, but they suffer from numerical instability when the media transitions are sharp. We use one of these models in the limit of pure vacuum derived from Liu and Yan [Appl. Math. Model. 38, 1710 (2014), 10.1016/j.apm.2013.09.009] and apply an extension that treats the effects of polarization and magnetization separately. We show simulations of simple examples in which EM waves travel into media to quantify error scaling, stability, accuracy, and time scaling. For conductive media, we use the Strang splitting and check the simulations accuracy at the example of the skin effect. Like pure EM propagation, the error for the static limits, which are constructed with a current density added in a first-order scheme, can be less than 1 % . The presented method is an easily implemented alternative for the stabilization of simulation for EM waves propagating in spatially complex structured media properties and arbitrary transitions.

From Augmentation Media to Meme Media.

Science.gov (United States)

Tanaka, Yuzuru

Computers as meta media are now evolving from augmentation media vehicles to meme media vehicles. While an augmentation media system provides a seamlessly integrated environment of various tools and documents, meme media system provides further functions to edit and distribute tools and documents. Documents and tools on meme media can easily…

Evaluation of wall thinning profile by flow accelerated corrosion in separation and union pipe

International Nuclear Information System (INIS)

Watanabe, Shun; Yoneda, Kimitoshi

2013-01-01

Flow Accelerated Corrosion (FAC) is a pipe wall thinning phenomena to be monitored and managed in power plants with high priority. At present, its management has been conducted with conservative evaluation of thinning rate and residual lifetime of the piping based on wall thickness measurements. However, noticeable case of wall thinning was occurred at separation and union pipe. In such pipe system, it is a problem to manage section beneath reinforcing plate of T-tube pipe and 'crotch' of T-joint pipe; the region where wall thickness measurement is difficult to conduct with ordinary ultrasonic testing device. In this study, numerical analysis for separation and union part of T-tube and T-joint pipe was conducted, and wall thinning profile by Flow Accelerated Corrosion was evaluated by calculating mass transfer coefficient and geometry factor. Based on these results, we considered applicable wall thinning management for T-tube and T-joint pipe. In the case of union flow from main and branch pipe, the wall thinning profile of T-tube showed the tendency of increase at main pipe like semielliptical region. On the other hand, noticeable profile appeared at 'crotch' in T-joint. Although it was found that geometry factor of T-joint in this case was half the value of T-tube, an alternative evaluation method to previous one might be needed for the profiles of 'semielliptical region' and 'crotch'. (author)

Mobilization and Resistance through Social Media

DEFF Research Database (Denmark)

Vestergaard Jørgensen, Anne; Etter, Michael; Colleoni, Elanor

Social media are widely considered as driving force for the institutionalization of CSR. It holds great potential for the empowerment of citizens, consumers, social movements or pressure groups. So far, this role of social media in the strategic communication of pressure groups is underexplored...... and associative frames (Guo & McCombs, 2011, Schultz et al., 2011) of the actors via semantic network analysis (1765 sentences in social media, 132 in press releases). The findings allow further evaluations of institutional, ethical and political conditions and reflections on the implications of “social media....... By analysing the use and content of social media of protest actors on the one hand and corporations on the other, the paper contributes to understanding the mechanisms, conditions and effects of social media based pressure on corporations. Drawing on social movement theory, discourse theory and neo...

Evaluating the Social Media Performance of Hospitals in Spain: A Longitudinal and Comparative Study.

Science.gov (United States)

Martinez-Millana, Antonio; Fernandez-Llatas, Carlos; Basagoiti Bilbao, Ignacio; Traver Salcedo, Manuel; Traver Salcedo, Vicente

2017-05-23

Social media is changing the way in which citizens and health professionals communicate. Previous studies have assessed the use of Health 2.0 by hospitals, showing clear evidence of growth in recent years. In order to understand if this happens in Spain, it is necessary to assess the performance of health care institutions on the Internet social media using quantitative indicators. The study aimed to analyze how hospitals in Spain perform on the Internet and social media networks by determining quantitative indicators in 3 different dimensions: presence, use, and impact and assess these indicators on the 3 most commonly used social media - Facebook, Twitter, YouTube. Further, we aimed to find out if there was a difference between private and public hospitals in their use of the aforementioned social networks. The evolution of presence, use, and impact metrics is studied over the period 2011- 2015. The population studied accounts for all the hospitals listed in the National Hospitals Catalog (NHC). The percentage of hospitals having Facebook, Twitter, and YouTube profiles has been used to show the presence and evolution of hospitals on social media during this time. Usage was assessed by analyzing the content published on each social network. Impact evaluation was measured by analyzing the trend of subscribers for each social network. Statistical analysis was performed using a lognormal transformation and also using a nonparametric distribution, with the aim of comparing t student and Wilcoxon independence tests for the observed variables. From the 787 hospitals identified, 69.9% (550/787) had an institutional webpage and 34.2% (269/787) had at least one profile in one of the social networks (Facebook, Twitter, and YouTube) in December 2015. Hospitals' Internet presence has increased by more than 450.0% (787/172) and social media presence has increased ten times since 2011. Twitter is the preferred social network for public hospitals, whereas private hospitals

Comparative evaluation of four transport media for maintaining cell viability in transportation of an avulsed tooth - An in vitro study.

Science.gov (United States)

Bharath, Makonahalli Jaganath; Sahadev, Chickmagravalli Krishnegowda; Ramachandra, Praveen Kumar Makonahalli; Rudranaik, Sandeep; George, Jijo; Thomas, Ashna

2015-01-01

The study was performed to compare and evaluate the efficacy of four experimental storage media (Hank's balanced salt solution, Ringer's lactate solution, tender coconut water, and green tea extract) for maintaining cell viability of human periodontal cells at different time intervals of 15 min 30 min, 60 min, and 90 min. Human periodontal cells were cultured and stored in the four media. After 15 min 30 min, 60 min, and 90 min, the different media were examined under optical microscope and viabilities analyzed using an optical calorimeter. Mean and standard deviation were estimated from the results that were statistically analyzed using one-way analysis of variance (ANOVA) to identify the significant groups. The results indicated that there was no difference in cell viability between the four media up to a period of 60 min, whereas green tea extract showed a lower cell viability after 90 min. Within the limitations of the present study, it appears that due to superior osmolality, cost effectiveness, and easier availability, Ringer's lactate, tender coconut water, and green tea extract can be used as alternate storage media for avulsed tooth.

Computed tomography study of otitis media

International Nuclear Information System (INIS)

Bahia, Paulo Roberto Valle; Marchiori, Edson

1997-01-01

The findings of computed tomography (CT) of 89 patients clinically suspected of having otitis media were studied in this work. Such results were compared to clinical diagnosis, otoscopy, surgical findings and previous data. Among the results of our analysis, we studied seven patients with acute otitis media and 83 patients with chronic otitis media. The patients with acute otitis media have undergone CT examinations to evaluate possible spread to central nervous system. The diagnosis of cholesteatoma, its extension and complications were the main indication. for chronic otitis media study. The main findings of the cholesteatomatous otitis were the occupation of the epitympanun, the bony wall destruction and the ossicular chain erosion. The CT demonstrated a great sensibility to diagnose the cholesteatoma. (author)

Social media management and media environment

Directory of Open Access Journals (Sweden)

Šiđanin Iva

2012-01-01

Full Text Available The paper deals with the system of services that social media management can offer to a variety of users. As social media systems are emerging, social media management can strengthen teams in social media and help to manage numerous social channels and distribution of social information from one place. Social media management is a system of procedures that are used to manage the flow of information in the environment of social media. This involves connecting with social media like Facebook, Twitter, LinkedIn, Plaxo, Ecademy, YouTube and many others, then the aggregation and management of social data. Social media management services are analysed through various fields, such as managing multiple social media profiles, mail scheduling and filtering, reporting and analytics. Social media management enables managing personal business through social media, which contributes to a significant reduction in expenditures. The paper also discusses the importance of social media management in marketing activities and various forms of social promotion, which allow companies to easily reach their customers.

Evaluation of Ultrafiltration Performance for Phospholipid Separation

Science.gov (United States)

Aryanti, N.; Wardhani, D. H.; Maulana, Z. S.; Roberto, D.

2017-11-01

Ultrafiltration membrane for degumming of crude palm oil has been applied as an alternative method since the membrane process required less procedure than the conventional degumming. This research focused on the examination of ultrafiltration performance for phospholipid separation from model crude palm oil degumming. Specifically, profile flux and rejection, as well as blocking mechanism, were investigated. Feed consisting of Refined Crude Palm Oil - Isopropanol - Lecithin mixtures were represented as crude palm oil degumming. Lecithin was denoted a phospholipid component, and the concentrations of lecithin in feed were varied to 0.1%, 0.2%, and 0.3%. The concentration of phospholipid was determined as phosphor content. At the concentration of lecithin in feed representing phospholipid concentration of 8,45 mg/kg, 8,45 mg/kg, 24,87 mg/kg and 57,58 mg/kg, respectively. Flux profiles confirmed that there was a flux decline during filtration. In addition, the lecithin concentrations do not significantly effect on further flux decline. Rejection characteristic and phospholipid concentration in the permeate showed that the phospholipid rejections by ultrafiltration were in the range of 23-79,5% representing permeate’s phospholipid concentration of 1,73 - 44,25 mg/kg. Evaluation of fouling mechanism by Hermia’s blocking model confirmed that the standard blocking is the dominant mechanism in the ultrafiltration of lecithin mixture.

Technical feasibility of advanced separation; Faisabilite technique de la separation poussee

Energy Technology Data Exchange (ETDEWEB)

Rostaing, Ch

2004-07-01

Advanced separation aims at reducing the amount and toxicity of high-level and long lived radioactive wastes. The Purex process has been retained as a reference way for the recovery of the most radio-toxic elements: neptunium, technetium and iodine. Complementary solvent extraction processes have to be developed for the separation of americium, curium and cesium from the high activity effluent of the spent fuel reprocessing treatment. Researches have been carried out with the aim of demonstrating the scientifical and technical feasibility of advanced separation of minor actinides and long lived fission products from spent fuels. The scientifical feasibility was demonstrated at the end of 2001. The technical feasibility works started in the beginning of 2002. Many results have been obtained which are presented and summarized in this document: approach followed, processes retained for the technical feasibility (An/Ln and Am/Cm separation), processes retained for further validation at the new shielded Purex installation, technical feasibility of Purex adaptation to Np separation, technical feasibility of Diamex (first step: (An+Ln)/other fission products) separation), technical feasibility of Sanex process (second step: An(III)/Ln(III) separation), technical feasibility of Am(III)/Cm(III) separation, cesium separation, iodine separation, technical-economical evaluation, conclusions and perspectives, facilities and apparatuses used for the experiments. (J.S.)

The Use of Violence in Media: Economics of Violence, the Ideological Violence of Media and an Evaluation in Retrospect of Cultivation Theory

OpenAIRE

Ömer ÖZER

2017-01-01

The main focus of this study is violence used in the media. Especially today for Turkey, the heavy use of violence in the media is an important problem. Indeed, the mass media coverage is loaded with violence. However, it is hard to say that so far there is enough research done on this issue. In the study, first, we showed that the researches done within the scope of effect problem do not provide adeaquate answers to the question of why media use so much violence. This is suitable fo...

An efficient Helmholtz solver for acoustic transversely isotropic media

KAUST Repository

Wu, Zedong

2017-11-11

The acoustic approximation, even for anisotropic media, is widely used in current industry imaging and inversion algorithms mainly because P-waves constitute the majority of the energy recorded in seismic exploration. The resulting acoustic formulas tend to be simpler, resulting in more efficient implementations, and depend on less medium parameters. However, conventional solutions of the acoustic wave equation with higher-order derivatives suffer from S-wave artifacts. Thus, we propose to separate the quasi-P wave propagation in anisotropic media into the elliptic anisotropic operator (free of the artifacts) and the non-elliptic-anisotropic components, which form a pseudo-differential operator. We, then, develop a separable approximation of the dispersion relation of non-elliptic-anisotropic components, specifically for transversely isotropic (TI) media. Finally, we iteratively solve the simpler lower-order elliptical wave equation for a modified source function that includes the non-elliptical terms represented in the Fourier domain. A frequency domain Helmholtz formulation of the approach renders the iterative implementation efficient as the cost is dominated by the Lower-Upper (LU) decomposition of the impedance matrix for the simpler elliptical anisotropic model. Also, the resulting wavefield is free of S-wave artifacts and has balanced amplitude. Numerical examples show that the method is reasonably accurate and efficient.

An efficient Helmholtz solver for acoustic transversely isotropic media

KAUST Repository

Wu, Zedong; Alkhalifah, Tariq Ali

2017-01-01

The acoustic approximation, even for anisotropic media, is widely used in current industry imaging and inversion algorithms mainly because P-waves constitute the majority of the energy recorded in seismic exploration. The resulting acoustic formulas tend to be simpler, resulting in more efficient implementations, and depend on less medium parameters. However, conventional solutions of the acoustic wave equation with higher-order derivatives suffer from S-wave artifacts. Thus, we propose to separate the quasi-P wave propagation in anisotropic media into the elliptic anisotropic operator (free of the artifacts) and the non-elliptic-anisotropic components, which form a pseudo-differential operator. We, then, develop a separable approximation of the dispersion relation of non-elliptic-anisotropic components, specifically for transversely isotropic (TI) media. Finally, we iteratively solve the simpler lower-order elliptical wave equation for a modified source function that includes the non-elliptical terms represented in the Fourier domain. A frequency domain Helmholtz formulation of the approach renders the iterative implementation efficient as the cost is dominated by the Lower-Upper (LU) decomposition of the impedance matrix for the simpler elliptical anisotropic model. Also, the resulting wavefield is free of S-wave artifacts and has balanced amplitude. Numerical examples show that the method is reasonably accurate and efficient.

A system for evaluating the use of media in CDC's National AIDS Information and Education Program.

Science.gov (United States)

Salmon, C T; Jason, J

1991-01-01

The National AIDS Information and Education Program (NAIEP) commissioned the National Academy of Sciences to design a prototypical system of research for use in the evaluation of the agency's media campaign. It consists of four types of evaluation: formative, efficacy, process, and outcome. These types of evaluations are used to answer such questions as the following: What message strategies will work best? Can a campaign under optimal conditions be expected to make a difference? What interventions are actually delivered during the campaign? Has the campaign actually had an impact? How NAIEP has used the system and adapted it during 1 year of research activities is outlined, and examples from a variety of other social marketing programs are described.

Indigenous development and performance evaluation of BARC aerodynamic size separator (BASS)

International Nuclear Information System (INIS)

Singh, Sanjay; Purwar, R.C.; Das, Tanmoy; Narayanan, K.P.; Sapra, B.K.; Sunny, Faby; Khan, Arshad; Mayya, Y.S.

2002-06-01

Commercially available cascade impactors, commonly used for aerodynamic size separation of aerosol particles, are based on the principle of inertial impaction. As of now, these instruments are imported at a cost of several lakhs of rupees; hence an effort has been made to develop an aerodynamic particle sizer indigenously in BARC. This unit, referred to as BARC Aerodynamic Size Separator (BASS), separates aerosols into seven size classes ranging from 0.53 μm to 10 μm and operates at a flow rate of 45 Ipm. Intercomparison studies between the standard Andersen Mark-II (Grasbey Andersen Inc.) impactor and BASS using nebulizer generated aerosols have consistently shown excellent performance by BASS in all respects. In particular, BASS yielded the parameters of polydisperse aerosols quite accurately. Experiments to evaluate the individual stage cut-off diameters show that these are within 8% of their designed value for all stages except the higher two stages which indicate about 30% lower values than the designed ones. The replotting of all the mass distribution data using the experimental cut-off diameters showed perfect lognormal fits, thereby indicating that these diameters are closer to the true stage cut-off diameters for BASS. The studies show that BASS will be suitable for determining the particle size distributions in the context of the radiological safety programmes of DAE. Being indigenous in design, it may be fabricated on a commercial scale at a cost far less than that of the imported units. Such a venture will greatly help several national programmes on atmospheric pollution being carried out by many laboratories and institutions across the country. (author)

Social media as an open-learning resource in medical education: current perspectives

Directory of Open Access Journals (Sweden)

Sutherland S

2017-06-01

Full Text Available S Sutherland,1 A Jalali2 1Department of Critical Care, The Ottawa Hospital, ²Division of Clinical and Functional Anatomy, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada Purpose: Numerous studies evaluate the use of social media as an open-learning resource in education, but there is a little published knowledge of empirical evidence that such open-learning resources produce educative outcomes, particularly with regard to student performance. This study undertook a systematic review of the published literature in medical education to determine the state of the evidence as to empirical studies that conduct an evaluation or research regarding social media and open-learning resources.Methods: The authors searched MEDLINE, ERIC, Embase, PubMed, Scopus, and Google Scholar from 2012 to 2017. This search included using keywords related to social media, medical education, research, and evaluation, while restricting the search to peer reviewed, English language articles only. To meet inclusion criteria, manuscripts had to employ evaluative methods and undertake empirical research.Results: Empirical work designed to evaluate the impact of social media as an open-learning resource in medical education is limited as only 13 studies met inclusion criteria. The majority of these studies used undergraduate medical education as the backdrop to investigate open-learning resources, such as Facebook, Twitter, and YouTube. YouTube appears to have little educational value due to the unsupervised nature of content added on a daily basis. Overall, extant reviews have demonstrated that we know a considerable amount about social media use, although to date, its impacts remain unclear.Conclusion: There is a paucity of outcome-based, empirical studies assessing the impact of social media in medical education. The few empirical studies identified tend to focus on evaluating the affective outcomes of social media and medical education as opposed to

Safety in online media – freedom of the media; safety of media actors and media education

OpenAIRE

Moeller, Ch

2013-01-01

In this paper, prepared for the international conference ‘Mass Media – Society – Education: Media Safety Problems’ at the Chelyabinsk State University’s Department for Journalism and Media Education from September 30 – October 3, 2013, I would like to address three dimensions of media safety and security in online media.

Leaving work at work: a balanced, compassionate, separate home life.

Science.gov (United States)

Mendes, Aysha

We all know it's important to keep our work and home lives separate, but in an age of new media, of being constantly 'on', how can we do this in practice? These issues are even more acute for nurses, argues Aysha Mendes, since the emotional nature of their work makes 'switching off' all the harder.

Educational Potential of New Media

OpenAIRE

Maria Yu. Kazak; Irina I. Karpenko; Aleksandr P. Korochenskiy; Andrey V. Polonskiy; Yan I. Tiazhlov; Svetlana V. Ushakova

2017-01-01

Digitalization of the mass media, which has radically changed the information environment, creates new opportunities for self-education and upgrowth of the audience. The paper defines the communicative and cultural status of new media, characterizes the socio-cultural and technological aspects of their dynamics; substantiates the necessity of elaborating mechanisms for systematization of heterogeneous information flows and elaborating criteria for their evaluation in the era of globalization ...

Fundamentals of affinity cell separations.

Science.gov (United States)

Zhang, Ye; Lyons, Veronica; Pappas, Dimitri

2018-03-01

Cell separations using affinity methods continue to be an enabling science for a wide variety of applications. In this review, we discuss the fundamental aspects of affinity separation, including the competing forces for cell capture and elution, cell-surface interactions, and models for cell adhesion. Factors affecting separation performance such as bond affinity, contact area, and temperature are presented. We also discuss and demonstrate the effects of nonspecific binding on separation performance. Metrics for evaluating cell separations are presented, along with methods of comparing separation techniques for cell isolation using affinity capture. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Evaluation of High Density Air Traffic Operations with Automation for Separation Assurance, Weather Avoidance and Schedule Conformance

Science.gov (United States)

Prevot, Thomas; Mercer, Joey S.; Martin, Lynne Hazel; Homola, Jeffrey R.; Cabrall, Christopher D.; Brasil, Connie L.

2011-01-01

In this paper we discuss the development and evaluation of our prototype technologies and procedures for far-term air traffic control operations with automation for separation assurance, weather avoidance and schedule conformance. Controller-in-the-loop simulations in the Airspace Operations Laboratory at the NASA Ames Research Center in 2010 have shown very promising results. We found the operations to provide high airspace throughput, excellent efficiency and schedule conformance. The simulation also highlighted areas for improvements: Short-term conflict situations sometimes resulted in separation violations, particularly for transitioning aircraft in complex traffic flows. The combination of heavy metering and growing weather resulted in an increased number of aircraft penetrating convective weather cells. To address these shortcomings technologies and procedures have been improved and the operations are being re-evaluated with the same scenarios. In this paper we will first describe the concept and technologies for automating separation assurance, weather avoidance, and schedule conformance. Second, the results from the 2010 simulation will be reviewed. We report human-systems integration aspects, safety and efficiency results as well as airspace throughput, workload, and operational acceptability. Next, improvements will be discussed that were made to address identified shortcomings. We conclude that, with further refinements, air traffic control operations with ground-based automated separation assurance can routinely provide currently unachievable levels of traffic throughput in the en route airspace.

Modelling of Emulsion Flow in Porous Media

Energy Technology Data Exchange (ETDEWEB)

Abou-Kassem, J.H. [UAE University (United Arab Emirates); Farouq Ali, S.M. [UAE University (United Arab Emirates)

1995-06-01

Oil recovery methods predominantly involve emulsion formation. Oil recovery simulation requires the incorporation of emulsion characteristics and flow in porous media, in order to optimize oil recovery from petroleum reservoirs. This paper explored the nature and rheology of emulsions, and evaluated several models of flow of Newtonian and non-Newtonian fluids in porous media. It also summarized in situ emulsion formation in porous media. A model for both Newtonian and non-Newtonian emulsion fluid flow was proposed, with special emphasis on pore size, and tortuosity in the porous media.

New Texts, New Tools: An Argument for Media Literacy.

Science.gov (United States)

McBrien, J. Lynn

1999-01-01

Adults cannot adequately prevent their children from observing media messages. Students are actually safer if they are educated about analyzing and assessing unsavory messages for themselves. Appropriate media-literacy pedagogy involves five essential elements: background, tools, deconstruction of media techniques, product evaluation, and original…

Using media to impact health policy-making: an integrative systematic review.

Science.gov (United States)

Bou-Karroum, Lama; El-Jardali, Fadi; Hemadi, Nour; Faraj, Yasmine; Ojha, Utkarsh; Shahrour, Maher; Darzi, Andrea; Ali, Maha; Doumit, Carine; Langlois, Etienne V; Melki, Jad; AbouHaidar, Gladys Honein; Akl, Elie A

2017-04-18

Media interventions can potentially play a major role in influencing health policies. This integrative systematic review aimed to assess the effects of planned media interventions-including social media-on the health policy-making process. Eligible study designs included randomized and non-randomized designs, economic studies, process evaluation studies, stakeholder analyses, qualitative methods, and case studies. We electronically searched Medline, EMBASE, Communication and Mass Media Complete, Cochrane Central Register of Controlled Trials, and the WHO Global Health Library. We followed standard systematic review methodology for study selection, data abstraction, and risk of bias assessment. Twenty-one studies met our eligibility criteria: 10 evaluation studies using either quantitative (n = 7) or qualitative (n = 3) designs and 11 case studies. None of the evaluation studies were on social media. The findings of the evaluation studies suggest that media interventions may have a positive impact when used as accountability tools leading to prioritizing and initiating policy discussions, as tools to increase policymakers' awareness, as tools to influence policy formulation, as awareness tools leading to policy adoption, and as awareness tools to improve compliance with laws and regulations. In one study, media-generated attention had a negative effect on policy advocacy as it mobilized opponents who defeated the passage of the bills that the media intervention advocated for. We judged the confidence in the available evidence as limited due to the risk of bias in the included studies and the indirectness of the evidence. There is currently a lack of reliable evidence to guide decisions on the use of media interventions to influence health policy-making. Additional and better-designed, conducted, and reported primary research is needed to better understand the effects of media interventions, particularly social media, on health policy-making processes, and

Production and chemical separation of 48 V radioisotope

International Nuclear Information System (INIS)

Szucs, Z.; Dudu, D.; Cimpeanu, C.; Luca, A.; Duta, E.; Sahagia, M.

2003-01-01

The positron emitter 48 V isotope (T 1/2 =16 d, γ-lines: 511 keV (100%), 983.5 (100%), 1312 (97.6%)) is of interest in several fields of science. This is valid for transmitting scans in the validation process of PET-camera by positron emission. It can be used as an industrial monitoring isotope by its γ-photons having high energy and intensity. Also, it is suitable for biological study since it is the only radioisotope of the biological trace element vanadium which can be a radiotracer due to its longer half-life. The 48 V was produced by nat Ti (d,xn) 48 V nuclear reaction in the U-120 cyclotron with activity of 6 mCi. The energy of irradiating beam was 13 MeV, its intensity was 5 μA and the metallic Ti target dimensions were 16 x 11 x 2 mm. For target cooling, the water circulation in the back side was used. After 3 cooling days, only 48 V, and some 46 Sc (T 1/2 = 84 d), produced by the side nuclear reaction 48 Ti (d,α) 46 Sc were found in the target. For the preparation of 48 V source, the Ti target was dissolved in HF and sulfuric acid. The ion exchange separation was developed for both dissolving methods. The dissolution of the chemically resistant Ti target is so violent in concentrated (3.5 % m/m) HF, that it is necessary to be carried out in polyethylene tube in order to avoid the splash of the dissolved target. An anion exchange column, Dowex 1-8 (size 100-200 mesh, length 12 cm, ID 10 mm, treated 1 day earlier, prepared fresh), was used for separation in HF media. The reduced ionic form of Ti bonds to resin, therefore the dissolved target was saturated with sulfur-dioxide produced in the Kipp-equipment by the following chemical reaction: Na 2 SO 3 + 2 HCl → 2 NaCl + H 2 SO 3 . The treated solution was diluted to a concentration of 2 mol/l of HF and the same concentration of the HF was used as an eluent for separation. Flow rate of the elution was 1 ml/min. The eluate was cooled fractionally. The fractions were measured by γ-spectrometry, which

Separation of uranium by extraction with foamed plastics

International Nuclear Information System (INIS)

Korkisch, J.

1983-07-01

Polyurethane foams are frequently used for the extraction and separation of inorganic and organic species. The attraction of the materials lies in their favourable hydrodynamic properties obviating the need for the forced-flow conditions associated with conventional chromatographic-type column packing of small particles. The research work described has been directed to providing information on the extraction and separation of uranium (and thorium) by an open-cell polyurethane foam from media containing nitrates and from hydrochloric acid systems. The influence of many different experimental parameters (concentrations, acidity, impregnation of the foam with organic extractants) on the extraction was investigated. Based on the results of these investigations two methods were developed to separate uranium from nitric acid solution and from hydrochloric acid solution, respectively. The first uses calcium or aluminium nitrate salting and foam impregnated with Aliquat 336, the second ascorbic acid addition and TOPO-impregnated foam. The methods separate uranium and thorium from each other and from most other elements and can be used analytically or in the purification of uranium from impure plant products such as yellow cake

My three shrinks: Personal stories of social media exploration.

Science.gov (United States)

Daviss, Steve; Hanson, Annette; Miller, Dinah

2015-04-01

Three psychiatrist authors illustrate the impact of social media on their professional lives by reflecting on personal stories about their experiences with social media. They reflect on their experiences with listservs, chat rooms, online forums, blogs, podcasts, and other interactive media, while recounting actual stories involving those media. The impact of social media on professional advocacy across broad populations is addressed. In addition, the use of social media in educating psychiatric trainees and informing forensic evaluations is discussed. Finally, social media as a tool for enhancing consumer advocacy and addressing controversial patient safety procedures in emergency settings is discussed.

The Takeoff of Social Media in Tourism

DEFF Research Database (Denmark)

Hvass, Kristian Anders; Munar, Ana Maria

2012-01-01

Over the years, online marketing has grown in importance in the tourism industry. This media space offers companies throughout the tourism value system numerous marketing tools, one of the most recent being social media. Social media allows companies to interact directly with customers via various...... Internet platforms and monitor and interact with customer opinions and evaluations of services. This exploratory article studies the travel portion of the tourism experience through airlines’ use of social media on two social media platforms for a 6-month time period. The social media content posted...... by airlines is analyzed and categorized according to the promotional marketing mix. In addition, the authors propose four categories to describe the overall communicative behavior. Among the results, it is shown that there is a lack of strategic perspective among airlines’ utilization of social media...

Determination of residual cell culture media components by MEKC.

Science.gov (United States)

Zhang, Junge; Chakraborty, Utpal; Foley, Joe P

2009-11-01

Folic acid, hypoxanthine, mycophenolic acid, nicotinic acid, riboflavin, and xanthine are widely used as cell culture media components in monoclonal antibody manufacturing. These components are subsequently removed during the downstream purification processes. This article describes a single MEKC method that can simultaneously determine all the listed compounds with acceptable LOD and LOQ. All the analytes were successfully separated by MEKC using running buffer containing 40 mM SDS, 20 mM sodium phosphate, and 20 mM sodium borate at pH 9.0. The MEKC method was compared to the corresponding CZE method using the same running buffer containing no SDS. The effect of SDS concentration on separation, the pH of the running buffer, and the detection wavelength were studied and optimal MEKC conditions were established. Good linearity was obtained with correlation coefficients of more than 0.99 for all analytes. Specificity, accuracy, and precision were also evaluated. The recovery was in the range of 89-112%. The precision results were in the range of 1.7-4.8%. The experimentally determined data demonstrated that the MEKC method is applicable to the determination of the six analytes in in-process samples from monoclonal antibody manufacturing processes.

Social media as an open-learning resource in medical education: current perspectives.

Science.gov (United States)

Sutherland, S; Jalali, A

2017-01-01

Numerous studies evaluate the use of social media as an open-learning resource in education, but there is a little published knowledge of empirical evidence that such open-learning resources produce educative outcomes, particularly with regard to student performance. This study undertook a systematic review of the published literature in medical education to determine the state of the evidence as to empirical studies that conduct an evaluation or research regarding social media and open-learning resources. The authors searched MEDLINE, ERIC, Embase, PubMed, Scopus, and Google Scholar from 2012 to 2017. This search included using keywords related to social media, medical education, research, and evaluation, while restricting the search to peer reviewed, English language articles only. To meet inclusion criteria, manuscripts had to employ evaluative methods and undertake empirical research. Empirical work designed to evaluate the impact of social media as an open-learning resource in medical education is limited as only 13 studies met inclusion criteria. The majority of these studies used undergraduate medical education as the backdrop to investigate open-learning resources, such as Facebook, Twitter, and YouTube. YouTube appears to have little educational value due to the unsupervised nature of content added on a daily basis. Overall, extant reviews have demonstrated that we know a considerable amount about social media use, although to date, its impacts remain unclear. There is a paucity of outcome-based, empirical studies assessing the impact of social media in medical education. The few empirical studies identified tend to focus on evaluating the affective outcomes of social media and medical education as opposed to understanding any linkages between social media and performance outcomes. Given the potential for social media use in medical education, more empirical evaluative studies are required to determine educational value.

Pengembangan Media Pembelajaran Fisika Mobile Learning berbasis Android

Directory of Open Access Journals (Sweden)

Irnin Agustina Dwi Astuti

2017-06-01

Full Text Available Abstract Physics topic about pressure sometime feels abstract for students. For solution about abtract problem the students, needed media learning can explain physics topic is with mobile learning with android. Almost all the students have smartphone, it would be nice if the smartphone is used for learning. Android apps in this study shows competence, materials, example problems, learning videos and interactive evaluation questions. The method used is the Research and Development (R&D with its development process using a model ADDIE (Analysis, Design, Development, Implementation and Evaluation. ADDIE model development research is done only until the Development stage, because of this study was limited to develop and produce a valid instructional media applications to be implemented based on an assessment validator. Data collection instruments consist of expert validation sheet material and sheet media expert validation given to 6 (six people validator that three media experts and three experts material. This study shows that the validation results are to be obtained percentage scoring average of 85.25% with a valid category. Based on the results of a study and discussion can be concluded that the application of instructional media android-based mobile learning are valid for use in learning of physics. Key words: physics learning media, android, mobile learning. Abstrak Materi fisika mengenai tekanan sering terkesan abstrak bagi siswa. Untuk mengatasi masalah keabstrakan siswa, maka diperlukan media pembelajaran yang dapat menjelaskan konsep fisika yaitu dengan media pembelajaran mobile learning berbasis android. Hampir semua siswa kini memiliki smartphone, sehingga lebih baik jika smartphone digunakan sebagai media belajar. Aplikasi android dalam penelitian ini berisi kompetensi, materi, contoh soal, video pembelajaran dan soal evaluasi interaktif. Metode penelitian yang digunakan adalah metode Research and Development (RnD dengan proses

[The evaluation of the quality of life in the patients presenting with various forms of chronic otitis media].

Science.gov (United States)

Kosyakov, S Ya; Minavnina, Yu V; Gunenkov, A V

Chronic otitis media (COM) is a widespread pathological condition that affects up to 2% of the general population. Certain forms of this disease markedly deteriorate the quality of life of the patients which makes them overestimate the severity of harm to their health status and can be a cause of inflated expectations as regards the results of the planned surgical treatment. The linking element between the patient's expectations and the outcomes of the surgical intervention may be the recently developed questionnaires for the evaluation of the health-related quality of life (HRQoL). One of them, the COMQ-12 questionnaire, was devised to estimate the subjective reports by the patients concerning the deterioration of their quality of life attributable to chronic otitis media. The objective of the present study was to characterize the value of the 5-point Russian-language version of COMQ-12 for the evaluation of each of its 12 items concerning various aspects of health based on the personal opinions of the patients suffering from chronic otitis media The study included 108 patients 49 of whom were men and 59 women (45% and 55% respectively) at the age varying from 16 to 84 years. The COMQ-12 scores, according to the reports of individual patients, ranged from 4 to 43 of the 60 ones possible. The average score was 19.4 (SD=8.3). The overall median COMQ-12 score was 20, and the mode scored 14. The Cronbach-alpha index was equal to 0.860. The Russian-language version of the COMQ-12 questionnaire provides a reliable tool for the estimation of the quality of life in the patients presenting with various forms of chronic otitis media.

Media Literacy in Times of Media Divides

Directory of Open Access Journals (Sweden)

Kaja Žuran

2013-12-01

Full Text Available We live in a post-modern society, an information society, a society based around knowledge and participation, and above all in a media society. In a media culture where media holds a dominant position, we cannot overlook the emerging idea of a ‘media divide’ within the frame of media education, media literate individuals and the expansion of the traditional concept of media literacy. Firstly, we are in an era of technological revolution, and it is time to consider the meaning and function of media and how we experience it in our everyday life. Secondly, as a society we are subject to intense media invasion and we all need to learn how to use it to our benefit and apply a critical and autonomous perspective towards selecting media content. Otherwise the media divide between the media literate and illiterate will widen; but is there even a chance to overcome the supposed divide between those who are formally media educated and those who are not?

Values of Modern Technology to Electronic Media Management in ...

African Journals Online (AJOL)

This paper examines the influence, impact and communicative values of modern technology to electronic media management in Nigeria. It evaluates changes in distribution and consumer technologies, the impact on media content, new business models for the electronic media, and concludes with a discussion of issues ...

Collisions of Two Spatial Solitons in Inhomogeneous Nonlinear Media

International Nuclear Information System (INIS)

Zhong Weiping; Yi Lin; Yang Zhengping; Xie Ruihua; Milivoj, Belic; Chen Goong

2008-01-01

Collisions of spatial solitons occurring in the nonlinear Schroeinger equation with harmonic potential are studied, using conservation laws and the split-step Fourier method. We find an analytical solution for the separation distance between the spatial solitons in an inhomogeneous nonlinear medium when the light beam is self-trapped in the transverse dimension. In the self-focusing nonlinear media the spatial solitons can be transmitted stably, and the interaction between spatial solitons is enhanced due to the linear focusing effect (and also diminished for the linear defocusing effect). In the self-defocusing nonlinear media, in the absence of self-trapping or in the presence of linear self-defocusing, no transmission of stable spatial solitons is possible. However, in such media the linear focusing effect can be exactly compensated, and the spatial solitons can propagate through

Center for Media Literacy Unveils the CML Medialit Kit[TM]: A Free Educational Framework that Helps Students Challenge and Understand Media

Science.gov (United States)

Social Studies, 2004

2004-01-01

Five key questions form the basis of the new CML MediaLit Kit, an educational framework and curriculum guide developed by the Center for Media Literacy. Adaptable to all grades, the key questions help children and young people evaluate the thousands of media messages that bombard them daily. More than two years in development and available for…

Rapid expansion and pseudo spectral implementation for reverse time migration in VTI media

KAUST Repository

Pestana, Reynam C

2012-04-24

In isotropic media, we use the scalar acoustic wave equation to perform reverse time migration (RTM) of the recorded pressure wavefield data. In anisotropic media, P- and SV-waves are coupled, and the elastic wave equation should be used for RTM. For computational efficiency, a pseudo-acoustic wave equation is often used. This may be solved using a coupled system of second-order partial differential equations. We solve these using a pseudo spectral method and the rapid expansion method (REM) for the explicit time marching. This method generates a degenerate SV-wave in addition to the P-wave arrivals of interest. To avoid this problem, the elastic wave equation for vertical transversely isotropic (VTI) media can be split into separate wave equations for P- and SV-waves. These separate wave equations are stable, and they can be effectively used to model and migrate seismic data in VTI media where |ε- δ| is small. The artifact for the SV-wave has also been removed. The independent pseudo-differential wave equations can be solved one for each mode using the pseudo spectral method for the spatial derivatives and the REM for the explicit time advance of the wavefield. We show numerically stable and high-resolution modeling and RTM results for the pure P-wave mode in VTI media. © 2012 Sinopec Geophysical Research Institute.

Rapid expansion and pseudo spectral implementation for reverse time migration in VTI media

KAUST Repository

Pestana, Reynam C; Ursin, Bjø rn; Stoffa, Paul L

2012-01-01

In isotropic media, we use the scalar acoustic wave equation to perform reverse time migration (RTM) of the recorded pressure wavefield data. In anisotropic media, P- and SV-waves are coupled, and the elastic wave equation should be used for RTM. For computational efficiency, a pseudo-acoustic wave equation is often used. This may be solved using a coupled system of second-order partial differential equations. We solve these using a pseudo spectral method and the rapid expansion method (REM) for the explicit time marching. This method generates a degenerate SV-wave in addition to the P-wave arrivals of interest. To avoid this problem, the elastic wave equation for vertical transversely isotropic (VTI) media can be split into separate wave equations for P- and SV-waves. These separate wave equations are stable, and they can be effectively used to model and migrate seismic data in VTI media where |ε- δ| is small. The artifact for the SV-wave has also been removed. The independent pseudo-differential wave equations can be solved one for each mode using the pseudo spectral method for the spatial derivatives and the REM for the explicit time advance of the wavefield. We show numerically stable and high-resolution modeling and RTM results for the pure P-wave mode in VTI media. © 2012 Sinopec Geophysical Research Institute.

Bound dipole solitary solutions in anisotropic nonlocal self-focusing media

DEFF Research Database (Denmark)

Mamaev, A.V.; Zozulya, A.A.; Mezentsev, V.K.

1997-01-01

We find and analyze bound dipole solitary solutions in media with anisotropic nonlocal photorefractive material response. The dipole solutions consist of two elliptically shaped Gaussian-type beams separated by several diameters, and with a pi phase shift between their fields. Spatial evolution...

Social Media Metrics Importance and Usage Frequency in Latvia

Directory of Open Access Journals (Sweden)

Ronalds Skulme

2017-12-01

Full Text Available Purpose of the article: The purpose of this paper was to explore which social media marketing metrics are most often used and are most important for marketing experts in Latvia and can be used to evaluate marketing campaign effectiveness. Methodology/methods: In order to achieve the aim of this paper several theoretical and practical research methods were used, such as theoretical literature analysis, surveying and grouping. First of all, theoretical research about social media metrics was conducted. Authors collected information about social media metric grouping methods and the most frequently mentioned social media metrics in the literature. The collected information was used as the foundation for the expert surveys. The expert surveys were used to collect information from Latvian marketing professionals to determine which social media metrics are used most often and which social media metrics are most important in Latvia. Scientific aim: The scientific aim of this paper was to identify if social media metrics importance varies depending on the consumer purchase decision stage. Findings: Information about the most important and most often used social media marketing metrics in Latvia was collected. A new social media grouping framework is proposed. Conclusions: The main conclusion is that the importance and the usage frequency of the social media metrics is changing depending of consumer purchase decisions stage the metric is used to evaluate.

The Eurosceptic Europeanization of Public Spheres: Print and Social Media Reactions to the 2014 European Parliament Elections

DEFF Research Database (Denmark)

Dutceac Segesten, Anamaria; Bossetta, Michael

2017-01-01

The present study tests the theoretical claim that Eurosceptics contribute to the Europeanization of national public spheres. Although advocating a renationalization of European politics, Eurosceptic parties can engender public media debates of transnational or European relevance. Through...... of social media vis-à-vis traditional media structures: print media was more Europeanized in scope, whereas social media publics were more aligned in their sentiment towards Euroscepticism....... a comparative research design of two national cases (Sweden and Denmark), we examine the public discourse on the day following the 2014 European Parliament elections across three media: print, Twitter, and Facebook. Separating the discussions of Eurosceptic issues and actors from other topics of the election...

媒体绩效考评指标体系建构探析%Construction and Analysis of Media Performance Examination and Evaluation Index System

Institute of Scientific and Technical Information of China (English)

梅笑冬; 陈小康

2014-01-01

Media performance examination and evaluation is to use qualitative and quantitative methods to examine media per-formance and make comprehensive evaluation, however, media performance examination and evaluation is different from the ex-amination and evaluation on a general enterprise and a general public organization and is more than the examination and evaluation on the individual of the organization employees, as a result, the examination and evaluation should take care of both social benefit and economic benefit. This paper constructs three primary examination indicators such as “the potential of resources and assets, business management capacity and result benefit capacity” and 18 secondary examination indicators in media performance exami-nation and evaluation by using Delphi Method, analytic hierarchy process, and comprehensive index method and so on.%媒体绩效考评，是指运用定性和定量的方法，对媒体绩效进行考核并作出综合评定、评价。媒体的绩效考评不同于一般企业和一般公共组织，更不同于对组织员工个人的考评。对它的考评，既要关心其社会效益，也要关心其经济效益。本文运用德菲尔法、层级分析法、综合指数法等方法，构建了媒体绩效考评的“资源资产潜力、经营管理能力、结果效益实力”3项一级考核指标和18项二级考评指标。

[Chronic otitis mediaChronic Otitis Media].

Science.gov (United States)

Kohles, N; Schulz, T; Eßer, D

2015-11-01

There are 2 different kinds of chronic otitis media: Otitis media chronica mesotympanalis and otitis media chronica epitympanalis (cholesteatoma). The incidence of chronic otitis media as reported in literature differs in a wide range. The incidence rates vary between 0.45 and 46%. Both, otitis media chronica mesotympanalis and cholesteatoma, lead to eardrum perforation due to lengthy and recurring inflammations. Furthermore, chronic otitis media is characterized by frequently recurring otorrhea and conductive hearing loss. Georg Thieme Verlag KG Stuttgart · New York.

Epidemiology of Intratemporal Complications of Otitis Media

Directory of Open Access Journals (Sweden)

Maranhão, André

2014-01-01

Full Text Available Introduction Despite the advent of antibiotics and immunizations in the last century, complications of otitis media remain quite frequent, have high morbidity and mortality rates, and pose a challenge to the otorhinolaryngologist. Objective To establish the annual incidence of intratemporal complications of otitis media and prospectively evaluate patients via an analysis of epidemiologic and clinical aspects. Methods Prospective, observational study. Between February 2010 and January 2011, patients admitted to a tertiary care, university-based otology practice with diagnosis of otitis media and an associated intratemporal complication (ITC were included in the study. The following data were evaluated: age, sex, type of ITC, treatment, imaging tests findings, type and degree of hearing loss, and clinical outcome. The overall incidence of all complications and of each complication individually was determined. Results A total of 1,816 patients were diagnosed with otitis media. For 592 (33% individuals, the diagnosis was chronic otitis media; for 1,224 (67%, the diagnosis was acute otitis media. ITCs of otitis media were diagnosed in 15 patients; thus, the annual incidence of intratemporal complications was 0.8%. We identified 19 ITC diagnoses in 15 patients (3 patients had more than one diagnosis. Labyrinthine fistulae were diagnosed in 7 (36.8% individuals, mastoiditis in 5 (26.3%, facial palsy in 4 (21.1%, and labyrinthitis in 3 (15.8%. Conclusion The incidence of intratemporal complications in Brazil remains significant when compared with developed countries. Chronic otitis media with cholesteatoma is the most frequent etiology of intratemporal complications. Labyrinthine fistula is the most common intratemporal complication.

Evaluation of adverse reactions to contrast media in the hospital

Science.gov (United States)

Ryu, J-H; Kim, E-Y

2013-01-01

Objective: To determine and analyse the characteristics of contrast media adverse reactions (CM-ARs) reported in a hospital. Methods: A retrospective review of CM-ARs from the electronic spontaneous adverse drug reaction (ADR) report system between January 2011 and August 2012 was conducted. CM-ARs were evaluated in terms of causality, severity, preventability and affected organs. Also, agreement and correlation among the tools used to evaluate CM-ARs were analysed. Results: The overall reaction rate was 1.5% (n = 286). In total, 269 CM-ARs were identified. For ADR causality, 96.7% (n = 260) and 98.5% (n = 265) were evaluated as “probable” ADR using the Naranjo probability scale and the World Health Organization–Uppsala Monitoring Centre causality categories, whereas 98.1% (n = 264) were evaluated as “certain” with Korean algorithm v. II. Of these, 91.4% (n = 246) were mild in severity and 96.7% (n = 260) were unpreventable. Most patients (n = 233, 86.7%) could be managed with observation and/or simple treatment. The most frequent reaction (n = 383, 79.5%) was dermatological. Spearman's correlation coefficient was 0.667 (p < 0.01), and the agreement was 98.1% between the Naranjo scale and the World Health Organization–Uppsala Monitoring Centre categories. No relationship was seen between CM-AR severity and gender or between in- and outpatients. Conclusion: In our study, most CM-ARs were mild and managed with simple treatment. However, as the number of patients undergoing CT procedures continues to increase, it is essential to identify and observe patients at risk for CM-ARs to prevent severe ADRs. Advances in knowledge: Continuous careful review of reporting and treatment protocols of CM-ARs is needed to prevent morbidity and mortality. PMID:24191123

Solving potential field problems in composite media with complicated geometries

International Nuclear Information System (INIS)

Yeh, H.

1977-01-01

Recently, Yeh developed a method of solving potential field problems for complicated geometries and theorems of piecewise continuous eigenfunctions which can be used to solve boundary-value problems in composite media by the separation of variables. This paper shows that by a proper arrangement of matching conditions and boundary conditions, this method and these theorems can be applied simultaneously so that the problems in composite media with complicated geometries can be solved. To illustrate this, a heat-conduction problem in a composite cylinder with an abrupt change in cross-section area is solved. Also presented in this paper are the method of handling the nonhomogeneous boundary conditions for composite media and the extension of one of the above-mentioned theorems to include imperfect contact on material boundaries

Opinion dynamics on interacting networks: media competition and social influence.

Science.gov (United States)

Quattrociocchi, Walter; Caldarelli, Guido; Scala, Antonio

2014-05-27

The inner dynamics of the multiple actors of the informations systems - i.e, T.V., newspapers, blogs, social network platforms, - play a fundamental role on the evolution of the public opinion. Coherently with the recent history of the information system (from few main stream media to the massive diffusion of socio-technical system), in this work we investigate how main stream media signed interaction might shape the opinion space. In particular we focus on how different size (in the number of media) and interaction patterns of the information system may affect collective debates and thus the opinions' distribution. We introduce a sophisticated computational model of opinion dynamics which accounts for the coexistence of media and gossip as separated mechanisms and for their feedback loops. The model accounts also for the effect of the media communication patterns by considering both the simple case where each medium mimics the behavior of the most successful one (to maximize the audience) and the case where there is polarization and thus competition among media memes. We show that plurality and competition within information sources lead to stable configurations where several and distant cultures coexist.

Opinion dynamics on interacting networks: media competition and social influence

Science.gov (United States)

Quattrociocchi, Walter; Caldarelli, Guido; Scala, Antonio

2014-05-01

The inner dynamics of the multiple actors of the informations systems - i.e, T.V., newspapers, blogs, social network platforms, - play a fundamental role on the evolution of the public opinion. Coherently with the recent history of the information system (from few main stream media to the massive diffusion of socio-technical system), in this work we investigate how main stream media signed interaction might shape the opinion space. In particular we focus on how different size (in the number of media) and interaction patterns of the information system may affect collective debates and thus the opinions' distribution. We introduce a sophisticated computational model of opinion dynamics which accounts for the coexistence of media and gossip as separated mechanisms and for their feedback loops. The model accounts also for the effect of the media communication patterns by considering both the simple case where each medium mimics the behavior of the most successful one (to maximize the audience) and the case where there is polarization and thus competition among media memes. We show that plurality and competition within information sources lead to stable configurations where several and distant cultures coexist.

Energy-Reduction Offloading Technique for Streaming Media Servers

Directory of Open Access Journals (Sweden)

Yeongpil Cho

2016-01-01

Full Text Available Recent growth in popularity of mobile video services raises a demand for one of the most popular and convenient methods of delivering multimedia data, video streaming. However, heterogeneity of currently existing mobile devices involves an issue of separate video transcoding for each type of mobile devices such as smartphones, tablet PCs, and smart TVs. As a result additional burden comes to media servers, which pretranscode multimedia data for number of clients. Regarding even higher increase of video data in the Internet in the future, the problem of media servers overload is impending. To struggle against the problem an offloading method is introduced in this paper. By the use of SorTube offloading framework video transcoding process is shifted from the centralized media server to the local offloading server. Thus, clients can receive personally customized video stream; meanwhile the overload of centralized servers is reduced.

Social Media Programs at the National Optical Astronomy Observatory

Science.gov (United States)

Sparks, Robert T.; Walker, Constance Elaine; Pompea, Stephen M.

2015-08-01

Observatories and other science research organizations want to share their research and activities with the public. The last several years, social media has become and increasingly important venue for communicating information about observatory activities, research and education and public outreach.The National Optical Astronomy Observatory (NOAO) uses a wide variety of social media to communicate with different audiences. NOAO is active on social media platforms including Facebook, Twitter, Google+ and Pinterest. Our social media accounts include those for the National Optical Astronomy Observatory, Cerro Tololo Inter-American Observatory, Kitt Peak National Observatory and our dark skies conservation program Globe at Night.Our social media programs have a variety of audiences. NOAO uses social media to announce and promote NOAO sponsored meetings, observatory news and proposal deadlines to the professional astronomical community. Social media accounts are used to disseminate NOAO press releases, images from the observatory and other science using data from NOAO telescopes.Social media is important in our Education and Public Outreach programs (EPO). Globe at Night has very active facebook and twitter accounts encouraging people to become involved in preserving dark skies. Social media plays a role in recruiting teachers for professional development workshops such as Project Astro.NOAO produces monthly podcasts for the 365 Days of Astronomy podcast featuring interviews with NOAO astronomers. Each podcast highlights the science of an NOAO astronomer, an NOAO operated telescope or instrument, or an NOAO program. A separate series of podcasts is produced for NOAO’s Dark Skies Education programs. All the podcasts are archived at 365daysofastronomy.org.

Examining the sources of variability in cell culture media used for biopharmaceutical production.

Science.gov (United States)

McGillicuddy, Nicola; Floris, Patrick; Albrecht, Simone; Bones, Jonathan

2018-01-01

Raw materials, in particular cell culture media, represent a significant source of variability to biopharmaceutical manufacturing processes that can detrimentally affect cellular growth, viability and specific productivity or alter the quality profile of the expressed therapeutic protein. The continual expansion of the biopharmaceutical industry is creating an increasing demand on the production and supply chain consistency for cell culture media, especially as companies embrace intensive continuous processing. Here, we provide a historical perspective regarding the transition from serum containing to serum-free media, the development of chemically-defined cell culture media for biopharmaceutical production using industrial scale bioprocesses and review production mechanisms for liquid and powder culture media. An overview and critique of analytical approaches used for the characterisation of cell culture media and the identification of root causes of variability are also provided, including in-depth liquid phase separations, mass spectrometry and spectroscopic methods.

An approach for evaluating the effects of source separation on municipal solid waste management

Energy Technology Data Exchange (ETDEWEB)

Tanskanen, J.H. [Finnish Environment Institute, Helsinki (Finland)

2000-07-01

An approach was developed for integrated analysis of recovery rates, waste streams, costs and emissions of municipal solid waste management (MSWM). The approach differs from most earlier models used in the strategic planning of MSWM because of a comprehensive analysis of on-site collection systems of waste materials separated at source for recovery. As a result, the recovery rates and sizes of waste streams can be calculated on the basis of the characteristics of separation strategies instead of giving them as input data. The modelling concept developed can also be applied in other regions, municipalities and districts. This thesis consists of four case studies. Three of these were performed to test the approach developed and to evaluate the effects of separation on MSWM in Finland. In these case studies the approach was applied for modelling: (1) Finland's national separation strategy for municipal solid waste, (2) the effects of separation on MSWM systems in the Helsinki region and (3) the efficiency of various waste collection methods in the Helsinki region. The models developed for these three case studies are static and linear simulation models which were constructed in the format of an Excel spreadsheet. In addition, a new version of the original Swedish MIMES/Waste model was constructed and applied in one of the case studies. The case studies proved that the approach is an applicable tool for various research settings and circumstances in the strategic planning of MSWM. The following main results were obtained from the case studies: A high recovery rate level (around 70 %wt) can be achieved in MSWM without incineration; Central sorting of mixed waste must be included in Finland's national separation strategy in order to reach the recovery rate targets of 50 %wt (year 2000) and 70 %wt (year 2005) adopted for municipal solid waste in the National Waste Plan. The feasible source separation strategies result in recovery rates around 35-40 %wt with the

Fluorescence excitation-emission matrix (EEM) spectroscopy for rapid identification and quality evaluation of cell culture media components.

Science.gov (United States)

Li, Boyan; Ryan, Paul W; Shanahan, Michael; Leister, Kirk J; Ryder, Alan G

2011-11-01

The application of fluorescence excitation-emission matrix (EEM) spectroscopy to the quantitative analysis of complex, aqueous solutions of cell culture media components was investigated. These components, yeastolate, phytone, recombinant human insulin, eRDF basal medium, and four different chemically defined (CD) media, are used for the formulation of basal and feed media employed in the production of recombinant proteins using a Chinese Hamster Ovary (CHO) cell based process. The comprehensive analysis (either identification or quality assessment) of these materials using chromatographic methods is time consuming and expensive and is not suitable for high-throughput quality control. The use of EEM in conjunction with multiway chemometric methods provided a rapid, nondestructive analytical method suitable for the screening of large numbers of samples. Here we used multiway robust principal component analysis (MROBPCA) in conjunction with n-way partial least squares discriminant analysis (NPLS-DA) to develop a robust routine for both the identification and quality evaluation of these important cell culture materials. These methods are applicable to a wide range of complex mixtures because they do not rely on any predetermined compositional or property information, thus making them potentially very useful for sample handling, tracking, and quality assessment in biopharmaceutical industries.

Double blind evaluation of the effects of various contrast media on extremity veins in the dog

International Nuclear Information System (INIS)

Laerum, F.; Dehner, L.P.; Rysavy, J.; Amplatz, K.; Minnesota Univ., Minneapolis

1987-01-01

Canine superficial extremity veins were examined grossly and microscopically in a double blind fashion for endothelial damage and phlebitis one hour and four days after the injection of ionic monomeric or dimeric, and non-ionic monomeric, 300 mg I/ml, contrast media. Superficial veins of all four extremities and the tail vein were injected with the same amounts of contrast medium after application of tourniquets for 20 minutes following the injections. Silver staining and prefixation of the veins were done in situ. The specimens were evaluated together with cross-sectioned, hematoxylin-eosin stained biopsies. On the basis of a randomized study of 77 dogs, endothelial damage or thrombosis caused by various contrast media as seen in man was not demonstrated. This may be due to species differences. It is postulated that canine endothelium may have a higher resistance to contrast medium injury than human endothelium. (orig.)

Immunomagnetic cell separation, imaging, and analysis using Captivate ferrofluids

Science.gov (United States)

Jones, Laurie; Beechem, Joseph M.

2002-05-01

We have developed applications of CaptivateTM ferrofluids, paramagnetic particles (approximately 200 nm diameter), for isolating and analyzing cell populations in combination with fluorescence-based techniques. Using a microscope-mounted magnetic yoke and sample insertion chamber, fluorescent images of magnetically captured cells were obtained in culture media, buffer, or whole blood, while non-magnetically labeled cells sedimented to the bottom of the chamber. We combined this immunomagnetic cell separation and imaging technique with fluorescent staining, spectroscopy, and analysis to evaluate cell surface receptor-containing subpopulations, live/dead cell ratios, apoptotic/dead cell ratios, etc. The acquired images were analyzed using multi-color parameters, as produced by nucleic acid staining, esterase activity, or antibody labeling. In addition, the immunomagnetically separated cell fractions were assessed through microplate analysis using the CyQUANT Cell Proliferation Assay. These methods should provide an inexpensive alternative to some flow cytometric measurements. The binding capacities of the streptavidin- labled Captivate ferrofluid (SA-FF) particles were determined to be 8.8 nmol biotin/mg SA-FF, using biotin-4- fluorescein, and > 106 cells/mg SA-FF, using several cell types labeled with biotinylated probes. For goat anti- mouse IgG-labeled ferrofluids (GAM-FF), binding capacities were established to be approximately 0.2 - 7.5 nmol protein/mg GAM-FF using fluorescent conjugates of antibodies, protein G, and protein A.

A research framework for pharmacovigilance in health social media: Identification and evaluation of patient adverse drug event reports.

Science.gov (United States)

Liu, Xiao; Chen, Hsinchun

2015-12-01

Social media offer insights of patients' medical problems such as drug side effects and treatment failures. Patient reports of adverse drug events from social media have great potential to improve current practice of pharmacovigilance. However, extracting patient adverse drug event reports from social media continues to be an important challenge for health informatics research. In this study, we develop a research framework with advanced natural language processing techniques for integrated and high-performance patient reported adverse drug event extraction. The framework consists of medical entity extraction for recognizing patient discussions of drug and events, adverse drug event extraction with shortest dependency path kernel based statistical learning method and semantic filtering with information from medical knowledge bases, and report source classification to tease out noise. To evaluate the proposed framework, a series of experiments were conducted on a test bed encompassing about postings from major diabetes and heart disease forums in the United States. The results reveal that each component of the framework significantly contributes to its overall effectiveness. Our framework significantly outperforms prior work. Published by Elsevier Inc.

Arsenic Removal from Drinking Water by Adsorptive Media - U.S. EPA Demonstration Project at Rollinsford, NH, Final Performance Evaluation Report

Science.gov (United States)

This report documents the activities performed and the results obtained from the arsenic removal treatment technology demonstration project at Rollinsford, New Hampshire. The objectives of the project were to evaluate: 1) the effectiveness of AdEdge Technologies’ AD -33TM media ...

Who owns the images? Image politics and media criticism in theater: a separation of powers

NARCIS (Netherlands)

Röttger, K.; Jackob, A.

2007-01-01

This article investigates the ownership of images analyzing not only the place and mode of image circulation, but also the question of who can access these images under what circumstances. It is not only concerned with the technical or electronic media that are often held responsible for the

Evaluating the Effect of Educational Media Exposure on Aggression in Early Childhood

Science.gov (United States)

Ostrov, Jamie M.; Gentile, Douglas A.; Mullins, Adam D.

2013-01-01

Preschool-aged children (M = 42.44 months-old, SD = 8.02) participated in a short-term longitudinal study investigating the effect of educational media exposure on social development (i.e., aggression and prosocial behavior) using multiple informants and methods. As predicted, educational media exposure significantly predicted increases in both…

Enhancing Media Personalization by Extracting Similarity Knowledge from Metadata

DEFF Research Database (Denmark)

Butkus, Andrius

be seen as a cognitive foundation for modeling concepts. Conceptual Spaces is applied in this thesis to analyze media in terms of its dimensions and knowledge domains, which in return defines properties and concepts. One of the most important domains in terms of describing media is the emotional one...... only “more of the same” type of content which does not necessarily lead to the meaningful personalization. Another way to approach similarity is to find a similar underlying meaning in the content. Aspects of meaning in media can be represented using Gardenfors Conceptual Spaces theory, which can......) using Latent Semantic Analysis (one of the unsupervised machine learning techniques). It presents three separate cases to illustrate the similarity knowledge extraction from the metadata, where the emotional components in each case represents different abstraction levels – genres, synopsis and lyrics...

Some Implications for Regulation of ICT and Media Convergence

DEFF Research Database (Denmark)

Henten, Anders; Falch, Morten; Tadayoni, Reza

The term convergence in the areas of ICT and media means the coming together of IT, telecommunications, broadcasting and other media, technologically, market and policy wise. It is the sectoral convergence of the hitherto more separate ICT and media areas, which is in focus, even though...... there certainly are also changes taking place vertically in the different sectors. The paper examines the relationships between technology and market developments and policy and regulatory initiatives. The issue is, therefore, not solely the implications of market and technology trends on policy and regulation......, but also the reverse implications of policy and regulatory frameworks on technology and market developments. The paper analyses the convergence tendencies at a technological, market level and policy and regulatory level. It is, however, the policy level, which is the centre of attention in the paper...

Developing android-based science instructional media to improve scientific literacy of junior high school students

Science.gov (United States)

Farida, I. I.; Jumadi; Wilujeng; Senam

2018-04-01

The aims of this study are: to develop android-based science instructional media and to reveal the characteristic, the quality, and the effectiveness of android-based science instructional media with global warming topic to increase junior high school students’ scientific literacy. This study is a development research. The instructional media were reviewed by a media expert, a material expert, science teachers, peer reviewers, and students. The data was collected using media evaluation questionnaires. The results of the study showed that: (1) the android-based science instructional media has characteristics including interesting visualization, easy to use, flexible, and practical, (2) the android-based science instructional media was appropriate for teaching, in terms of material evaluation aspects, media evaluation aspects, and based on student test results, and (3) the android-based science instructional media can effectively used for teaching.

COMPARATIVE EVALUATION OF CULTURE MEDIA FOR PATHOGEN ISOLATION OF PURULENT BACTERIAL MENINGITIS

Directory of Open Access Journals (Sweden)

Ya. V. Podkopaev

2016-01-01

Full Text Available The State Research Center for Applied Microbiology and Biotechnology has designed two nutrient media — chocolate agar and PBM-agar to isolate pathogens of purulent bacterial meningitis (PBM. In our previous research using collected microbial strains the media were shown to be highly susceptible and to provide the growth of Neisseria meningiti-dis, Streptococcus pneumoniae and Haemophilus influenzae strains, when inoculated with microbial suspensions containing single cells. When isolating Haemophilus influenzae, meningococci, and pneumococci the use of selective additives in both media assures selective isolation of required microorganisms, inhibiting contaminants. The objective of this research was to assess the media in bacteriological tests of clinical samples collected from the upper and lower respiratory tract in humans. The bacteriological plating of throat smear specimens (n = 90 from children and adults at the age of 0 to 66 with disorder of the upper respiratory tract on chocolate agar, PBM-agar and on a control medium in the absence of selective additives resulted in the equal amount of microbial cultures isolated. Of 154 isolated cultures 2, 23 and 9 were attributed to Neisseria meningitidis, Streptococcus pneumoniae and Haemophilus influenzae, respectively. The plating of throat smears (n = 10 from healthy people at the age of 30 to 55 on the analyzable and control media in the presence of additives allowed us to selectively isolate Haemophilus influenzae and Streptococcus pneumoniae cultures without a quantitative loss, with contaminants inhibited. By their growth characteristics chocolate agar and PBM-agar were highly competitive with reference media being used in clinical practice for isolating main causative agents of purulent bacterial meningitis.

Social Media and Seamless Learning: Lessons Learned

Science.gov (United States)

Panke, Stefanie; Kohls, Christian; Gaiser, Birgit

2017-01-01

The paper discusses best practice approaches and metrics for evaluation that support seamless learning with social media. We draw upon the theoretical frameworks of social learning theory, transfer learning (bricolage), and educational design patterns to elaborate upon different ideas for ways in which social media can support seamless learning.…

Impact of social media in sports marketing

OpenAIRE

Gadiraju, Gaurav Kumar

2016-01-01

JEL: M1 - Business Administration; M31 – Marketing; M37 - Advertising The purpose of this research is to evaluate the impact of social media in the field of sports marketing. This is carried out through an in-depth analysis on sports marketing and the rising popularity of social media marketing for sports brands in the world. One such brand is Nike, Inc. This company has shifted its focus to digital marketing. As social media marketing started to explode, the traditional marketing methods ...

Computers in radiology. The sedation, analgesia, and contrast media computerized simulator: a new approach to train and evaluate radiologists' responses to critical incidents

International Nuclear Information System (INIS)

Medina, L.S.; Racadio, J.M.; Schwid, H.A.

2000-01-01

Background. Awareness and preparedness to handle sedation, analgesia, and contrast-media complications are key in the daily radiology practice. Objective. The purpose is to create a computerized simulator (PC-Windows-based) that uses a graphical interface to reproduce critical incidents in pediatric and adult patients undergoing a wide spectrum of radiologic sedation, analgesia and contrast media complications. Materials and methods. The computerized simulator has a comprehensive set of physiologic and pharmacologic models that predict patient response to management of sedation, analgesia, and contrast-media complications. Photorealistic images, real-time monitors, and mouse-driven information demonstrate in a virtual-reality fashion the behavior of the patient in crisis. Results. Thirteen pediatric and adult radiology scenarios are illustrated encompassing areas such as pediatric radiology, neuroradiology, interventional radiology, and body imaging. The multiple case scenarios evaluate randomly the diagnostic and management performance of the radiologist in critical incidents such as oversedation, anaphylaxis, aspiration, airway obstruction, apnea, agitation, bronchospasm, hypotension, hypertension, cardiac arrest, bradycardia, tachycardia, and myocardial ischemia. The user must control the airway, breathing and circulation, and administer medications in a timely manner to save the simulated patient. On-line help is available in the program to suggest diagnostic and treatment steps to save the patient, and provide information about the medications. A printout of the case management can be obtained for evaluation or educational purposes. Conclusion. The interactive computerized simulator is a new approach to train and evaluate radiologists' responses to critical incidents encountered during radiologic sedation, analgesia, and contrast-media administration. (orig.)

Evolutionary Ship Track Planning within Traffic Separation Schemes – Evaluation of Individuals

Directory of Open Access Journals (Sweden)

Rafal Szlapczynski

2013-06-01

Full Text Available The paper presents an extended version of the author’s Evolutionary Sets of Safe Ship Trajectories method. The method plans safe tracks of all ships involved in an encounter including speed reduction maneuvers, if necessary, and taking into account Rule 10 of COLREGS, which specifies ships’ behavior within Traffic Separation Schemes governed by IMO. The paper focuses on the evaluation phase of the evolutionary process and shows how fitness function is designed to compare various possible tracks as well as to assess the quality of a final solution. The impact of the fitness function on the method’s results is illustrated by examples.

Transport phenomena in porous media

CERN Document Server

Ingham, Derek B

1998-01-01

Research into thermal convection in porous media has substantially increased during recent years due to its numerous practical applications. These problems have attracted the attention of industrialists, engineers and scientists from many very diversified disciplines, such as applied mathematics, chemical, civil, environmental, mechanical and nuclear engineering, geothermal physics and food science. Thus, there is a wealth of information now available on convective processes in porous media and it is therefore appropriate and timely to undertake a new critical evaluation of this contemporary information. Transport Phenomena in Porous Media contains 17 chapters and represents the collective work of 27 of the world's leading experts, from 12 countries, in heat transfer in porous media. The recent intensive research in this area has substantially raised the expectations for numerous new practical applications and this makes the book a most timely addition to the existing literature. It includes recent major deve...

Review and evaluation of extractants for strontium removal using magnetically assisted chemical separation

International Nuclear Information System (INIS)

Bauer, C.B.; Rogers, R.D.

1995-11-01

A literature review on extractants for strontium removal was initially performed at Northern Illinois University to assess their potential in magnetically assisted chemical separation. A series of potential strontium extractants was systematically evaluated there using radioanalytical methods. Initial experiments were designed to test the uptake of strontium from nitric acid using several samples of magnetic extractant particles that were coated with various crown ether ligands. High partition coefficient (K d ) values for stimulant tank waste were obtained. Further studies demonstrated that the large partitioning was due to uncoated particles

Review and evaluation of extractants for strontium removal using magnetically assisted chemical separation

Energy Technology Data Exchange (ETDEWEB)

Bauer, C.B.; Rogers, R.D. [Northern Illinois Univ., De Kalb, IL (United States). Dept. of Chemistry; Nunez, L.; Ziemer, M.D.; Pleune, T.T.; Vandegrift, G.F. [Argonne National Lab., IL (United States)

1995-11-01

A literature review on extractants for strontium removal was initially performed at Northern Illinois University to assess their potential in magnetically assisted chemical separation. A series of potential strontium extractants was systematically evaluated there using radioanalytical methods. Initial experiments were designed to test the uptake of strontium from nitric acid using several samples of magnetic extractant particles that were coated with various crown ether ligands. High partition coefficient (K{sub d}) values for stimulant tank waste were obtained. Further studies demonstrated that the large partitioning was due to uncoated particles.

Pilot and Controller Evaluations of Separation Function Allocation in Air Traffic Management

Science.gov (United States)

Wing, David; Prevot, Thomas; Morey, Susan; Lewis, Timothy; Martin, Lynne; Johnson, Sally; Cabrall, Christopher; Como, Sean; Homola, Jeffrey; Sheth-Chandra, Manasi; style="text-decoration: none; " href="javascript:void(0); " onClick="displayelement('author_20130014930'); toggleEditAbsImage('author_20130014930_show'); toggleEditAbsImage('author_20130014930_hide'); "> style="display:inline; width:12px; height:12px; " src="images/arrow-up.gif" width="12" height="12" border="0" alt="hide" id="author_20130014930_show"> style="width:12px; height:12px; display:none; " src="images/arrow-down.gif" width="12" height="12" border="0" alt="hide" id="author_20130014930_hide">

2013-01-01

Two human-in-the-loop simulation experiments were conducted in coordinated fashion to investigate the allocation of separation assurance functions between ground and air and between humans and automation. The experiments modeled a mixed-operations concept in which aircraft receiving ground-based separation services shared the airspace with aircraft providing their own separation service (i.e., self-separation). Ground-based separation was provided by air traffic controllers without automation tools, with tools, or by ground-based automation with controllers in a managing role. Airborne self-separation was provided by airline pilots using self-separation automation enabled by airborne surveillance technology. The two experiments, one pilot-focused and the other controller-focused, addressed selected key issues of mixed operations, assuming the starting point of current-day operations and modeling an emergence of NextGen technologies and procedures. In the controller-focused experiment, the impact of mixed operations on controller performance was assessed at four stages of NextGen implementation. In the pilot-focused experiment, the limits to which pilots with automation tools could take full responsibility for separation from ground-controlled aircraft were tested. Results indicate that the presence of self-separating aircraft had little impact on the controllers' ability to provide separation services for ground-controlled aircraft. Overall performance was best in the most automated environment in which all aircraft were data communications equipped, ground-based separation was highly automated, and self-separating aircraft had access to trajectory intent information for all aircraft. In this environment, safe, efficient, and highly acceptable operations could be achieved for twice today's peak airspace throughput. In less automated environments, reduced trajectory intent exchange and manual air traffic control limited the safely achievable airspace throughput and

Evaluating source separation of plastic waste using conjoint analysis.

Science.gov (United States)

Nakatani, Jun; Aramaki, Toshiya; Hanaki, Keisuke

2008-11-01

Using conjoint analysis, we estimated the willingness to pay (WTP) of households for source separation of plastic waste and the improvement of related environmental impacts, the residents' loss of life expectancy (LLE), the landfill capacity, and the CO2 emissions. Unreliable respondents were identified and removed from the sample based on their answers to follow-up questions. It was found that the utility associated with reducing LLE and with the landfill capacity were both well expressed by logarithmic functions, but that residents were indifferent to the level of CO2 emissions even though they approved of CO2 reduction. In addition, residents derived utility from the act of separating plastic waste, irrespective of its environmental impacts; that is, they were willing to practice the separation of plastic waste at home in anticipation of its "invisible effects", such as the improvement of citizens' attitudes toward solid waste issues.

Media Exposure: How Models Simplify Sampling

DEFF Research Database (Denmark)

Mortensen, Peter Stendahl

1998-01-01

In media planning, the distribution of exposures to more ad spots in more media (print, TV, radio) is crucial to the evaluation of the campaign. If such information should be sampled, it would only be possible in expensive panel-studies (eg TV-meter panels). Alternatively, the distribution...... of exposures may be modelled statistically, using the Beta distribution combined with the Binomial Distribution. Examples are given....

The effectiveness of different approaches to media literacy in modifying adolescents' responses to alcohol.

Science.gov (United States)

Chen, Yi-Chun Yvonnes

2013-01-01

Fearing the negative effect that alcohol advertising might have on adolescents' receptiveness to the consumption of alcohol, health educators have used media literacy as an effective strategy to mitigate the effect of these messages in the media. The present study applied parental mediation to the design and evaluations of a media literacy curriculum that targets alcohol decision-making processes illustrated in the message interpretation process model. The authors conducted a pretest-posttest quasi-experiment of 171 adolescents to examine the effect of a negative evaluative approach and a balanced evaluative approach (a combination of negative and positive evaluative strategies) to media literacy on modifying adolescents' responses to alcohol messages. Results showed that different media literacy approaches had varying degrees of effectiveness on adolescent boys and girls. After receiving a negative media literacy lesson, adolescent boys regarded television characters as less realistic and believed that drinking alcohol had negative consequences. In contrast, adolescent girls benefited more from a balanced evaluative approach as their media skepticism attitude was enhanced. Results suggest that health educators should choose tailored pedagogical approaches that are based on gender to improve decision making regarding alcohol consumption.

Evaluation of a multi-site program designed to strengthen relational bonds for siblings separated by foster care.

Science.gov (United States)

Waid, Jeffrey; Wojciak, Armeda Stevenson

2017-10-01

Sibling relationships in foster care settings have received increased attention in recent years. Despite growing evidence regarding the protective potential of sibling relationships for youth in care, some sibling groups continue to experience foster care related separation, and few programs exist to address the needs of these youth. This study describes and evaluates Camp To Belong, a multi-site program designed to provide short-term reunification to separated sibling groups through a week-long summer camp experience. Using a pre-test post-test survey design, this paper examines changes in youth ratings of sibling conflict and sibling support across camps located in six geographically distinct regions of the United States. The effects of youth age, number of prior camp exposures, and camp location were tested using multilevel modeling procedures. Findings suggest that participation in Camp To Belong may reduce sibling conflict, and improvements in sibling support are noted for youth who have had prior exposure to the camp's programming. Camp-level variance in the sibling support outcome highlight the complex nature of relationships for siblings separated by foster care, and suggest the need for additional research. Lessons learned from this multi-site evaluation and future directions are discussed. Copyright © 2017 Elsevier Ltd. All rights reserved.

Managing Media: Segmenting Media Through Consumer Expectancies

Directory of Open Access Journals (Sweden)

Matt Eastin

2014-04-01

Full Text Available It has long been understood that consumers are motivated to media differently. However, given the lack of comparative model analysis, this assumption is without empirical validation, and thus, the orientation of segmentation from a media management perspective is without motivational grounds. Thus, evolving the literature on media consumption, the current study develops and compares models of media segmentation within the context of use. From this study, six models of media expectancies were constructed so that motivational differences between media (i.e., local and national newspapers, network and cable television, radio, and Internet could be observed. Utilizing higher order statistical analyses the data indicates differences across a model comparison approach for media motivations. Furthermore, these differences vary across numerous demographic factors. Results afford theoretical advancement within the literature of consumer media consumption as well as provide media planners’ insight into consumer choices.

INDIVIDUALISME DAN LIBERALISME DALAM SEKULARISME MEDIA AMERIKA

Directory of Open Access Journals (Sweden)

Alia Azmi

2013-06-01

Full Text Available Liberal thoughts argue that men have rational and logical ability to decide the rightest and best choice for themselves, which means that men are autonomous in determining their life’s orientation and truth. Therefore men cannot be forced to accept certain general truth from the society because each person have distinguished goal, which is incommensurable. The single interpretation of truth is considered incompatible with human ability to contemplate their objectives. This makes the basis of the secular practice in American society; the separation of church (religion and state, where religion is considered private matters. The amendment of the constitution clearly notes that state should not make any law respecting or against practice of any religion. This practice can be seen in the American mass media, where most hold liberal view and shun away from religious debates. Media as a public sphere play an important role in facilitating the debate about discourses, therefore refrain from  private matters such as religion. Key words: liberal self-determinism, secularism, American media

An FDTD algorithm for simulating light propagation in anisotropic dynamic gain media

KAUST Repository

Al-Jabr, A. A.; San Roman Alerigi, Damian; Ooi, Boon S.; Alsunaidi, M. A.

2014-01-01

Simulating light propagation in anisotropic dynamic gain media such as semiconductors and solid-state lasers using the finite difference time-domain FDTD technique is a tedious process, as many variables need to be evaluated in the same instant of time. The algorithm has to take care of the laser dynamic gain, rate equations, anisotropy and dispersion. In this paper, to the best of our knowledge, we present the first algorithm that solves this problem. The algorithm is based on separating calculations into independent layers and hence solving each problem in a layer of calculations. The anisotropic gain medium is presented and tested using a one-dimensional set-up. The algorithm is then used for the analysis of a two-dimensional problem.

An FDTD algorithm for simulating light propagation in anisotropic dynamic gain media

KAUST Repository

Al-Jabr, A. A.

2014-05-02

Simulating light propagation in anisotropic dynamic gain media such as semiconductors and solid-state lasers using the finite difference time-domain FDTD technique is a tedious process, as many variables need to be evaluated in the same instant of time. The algorithm has to take care of the laser dynamic gain, rate equations, anisotropy and dispersion. In this paper, to the best of our knowledge, we present the first algorithm that solves this problem. The algorithm is based on separating calculations into independent layers and hence solving each problem in a layer of calculations. The anisotropic gain medium is presented and tested using a one-dimensional set-up. The algorithm is then used for the analysis of a two-dimensional problem.

A critical evaluation of science outreach via social media: its role and impact on scientists.

Science.gov (United States)

McClain, Craig; Neeley, Liz

2014-01-01

The role of scientists in social media and its impact on their careers are not fully explored.  While policies and best practices are still fluid, it is concerning that discourse is often based on little to no data, and some arguments directly contradict the available data.  Here, we consider the relevant but subjective questions about science outreach via social media (SOSM), specifically: (1) Does a public relations nightmare exist for science?; (2) Why (or why aren't) scientists engaging in social media?; (3) Are scientists using social media well?; and (4) Will social media benefit a scientist's career? We call for the scientific community to create tangible plans that value, measure, and help manage scientists' social media engagement.

STRATEGI MEDIA RELATIONS HUMAS PT. PELABUHAN INDONESIA III DALAM HANDLING CRISIS PEMBERITAAN

Directory of Open Access Journals (Sweden)

Agesty Sabreyna RM

2016-03-01

Full Text Available Media Relations was a requirement for Public Relation practitioners thatPR had an important role in a relationship with media. It was because thetask of public relation was the mass media and journalist. PT PelabuhanIndonesia III (Persero as a State-owned enterprised cannot separate withthe crisis news. The strategy of media relations was very important to handlethe negative publicity because it could affect a company’s image.This research used qualitative descriptive method with data collectiontechniques, observation, interviews, and literature. The aim was determinethe media relations strategy of PT. Pelabuhan Indonesia III (Persero tohandle media crisis and compared it with the theory used. This study usedtheory of public relations, crisis and the media of media relations in crisissituation. The crisis of media should solve quickly and precisely, by handling the crisis.The results of this research to handle a news crisis, the steps were: 1. Analysis,2. Identification, 3. Responds media. All the four steps above, the activity ofmedia relations were very important to do, and the strategy of media relationsused to support roles, functions and duties of public relations. The strategy ofmedia relations were: By served the media, By established a reputations for reliability, By supplying good copy, By cooperations in providing materials, verifications By provided facilities, and By build a personal relationship withthe media. The six of those strategies was the activity of public relationscommunications to establish understanding and good relations with the massmedia.Keywords: Crisis, Public Relations, Media Relations, Strategy, andPelabuhan Indonesia III (Persero

Magnetically Separable Fe3O4@DOPA-Pd: A Heterogeneous Catalyst for Aqueous Heck Reaction

Science.gov (United States)

Magnetically separable Fe3O4@DOPA-Pd catalyst has been synthesized via anchoring of palladium over dopamine-coated magnetite via non-covalent interaction and the catalyst is utilized for expeditious Heck coupling in aqueous media.

Corporate Evaluation in Banks - Development of a New Evaluation Model with the Special Focus on the Separation of the Value of Maturity Transformation

OpenAIRE

Svend Reuse

2011-01-01

Banks have to be handled differently in the theory of corporate evaluation. After a critical discussion of existing approaches of corporate evaluation, the following results can be stated: As banks generate value by an efficient liability side, gross methods do not lead to reliable results concerning a bank’s value. Further, the effects of maturity transformation have to be separated as they do not increase the value of banks. The model developed by the author takes these aspects into consid...

Separation of Tritium from Wastewater

International Nuclear Information System (INIS)

JEPPSON, D.W.

2000-01-01

A proprietary tritium loading bed developed by Molecular Separations, Inc (MSI) has been shown to selectively load tritiated water as waters of hydration at near ambient temperatures. Tests conducted with a 126 (micro)C 1 tritium/liter water standard mixture showed reductions to 25 (micro)C 1 /L utilizing two, 2-meter long columns in series. Demonstration tests with Hanford Site wastewater samples indicate an approximate tritium concentration reduction from 0.3 (micro)C 1 /L to 0.07 (micro)C 1 /L for a series of two, 2-meter long stationary column beds Further reduction to less than 0.02 (micro)C 1 /L, the current drinking water maximum contaminant level (MCL), is projected with additional bed media in series. Tritium can be removed from the loaded beds with a modest temperature increase and the beds can be reused Results of initial tests are presented and a moving bed process for treating large quantities of wastewaters is proposed. The moving bed separation process appears promising to treat existing large quantities of wastewater at various US Department of Energy (DOE) sites. The enriched tritium stream can be grouted for waste disposition. The separations system has also been shown to reduce tritium concentrations in nuclear reactor cooling water to levels that allow reuse. Energy requirements to reconstitute the loading beds and waste disposal costs for this process appear modest

Advanced Aqueous Separation Systems for Actinide Partitioning

Energy Technology Data Exchange (ETDEWEB)

Nash, Ken [Washington State Univ., Pullman, WA (United States); Martin, Leigh [Idaho National Lab. (INL), Idaho Falls, ID (United States); Lumetta, Gregg [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

2015-04-02

One of the most challenging aspects of advanced processing of used nuclear fuel is the separation of transplutonium actinides from fission product lanthanides. This separation is essential if actinide transmutation options are to be pursued in advanced fuel cycles, as lanthanides compete with actinides for neutrons in both thermal and fast reactors, thus limiting efficiency. The separation is difficult because the chemistry of Am3+ and Cm3+ is nearly identical to that of the trivalent lanthanides (Ln3+). The prior literature teaches that two approaches offer the greatest probability of devising a successful group separation process based on aqueous processes: 1) the application of complexing agents containing ligand donor atoms that are softer than oxygen (N, S, Cl-) or 2) changing the oxidation state of Am to the IV, V, or VI state to increase the essential differences between Am and lanthanide chemistry (an approach utilized in the PUREX process to selectively remove Pu4+ and UO22+ from fission products). The latter approach offers the additional benefit of enabling a separation of Am from Cm, as Cm(III) is resistant to oxidation and so can easily be made to follow the lanthanides. The fundamental limitations of these approaches are that 1) the soft(er) donor atoms that interact more strongly with actinide cations than lanthanides form substantially weaker bonds than oxygen atoms, thus necessitating modification of extraction conditions for adequate phase transfer efficiency, 2) soft donor reagents have been seen to suffer slow phase transfer kinetics and hydro-/radiolytic stability limitations and 3) the upper oxidation states of Am are all moderately strong oxidants, hence of only transient stability in media representative of conventional aqueous separations systems. There are examples in the literature of both approaches having been described. However, it is not clear at present that any extant process is sufficiently robust for application at the scale

Ionic and non-ionic contrast media used for contrast-enhanced computed tomography in experimental pancreatitis

International Nuclear Information System (INIS)

Kivisaari, L.; Nuutinen, P.; Lehtola, A.; Saari, A.; Pitkaeranta, P.; Standertskjoeld-Nordenstam, C.G.; Lempinen, M.; Schroeder, T.; Helsinki Univ. Central Hospital

1988-01-01

Contrast enhancement of the pancreas was studied in pigs using dynamic computed tomography in experimental oedematous and haemorrhagic/necrotizing pancreatitis during the first two minutes after injection of an intravenous bolus of non-ionic contrast medium (iohexol). The prospects of separating the two forms of the disease, known to be possible with ionic contrast media, were tested with a non-ionic contrast medium. In the oedematous form, contrast enhancement after 5 hours of the disease was significantly higher than in the haemorrhagic/necrotizing form. Contrast enhancement after 30 hours of disease tended to vary with the severity of the disease, showing that the course of oedematous pancreatitis is dynamic. Intermediate forms occur and follow-up studies are needed during the disease. A non-ionic contrast medium proved as good for separating the two forms of the disease in the early phase as were ionic contrast media. In severely ill patients, non-ionic contrast media should therefore be used. (orig.)

Pd-catalyzed ethylene methoxycarbonylation with Brønsted acid ionic liquids as promoter and phase-separable reaction media

DEFF Research Database (Denmark)

Garcia-Suarez, Eduardo J.; Khokarale, Santosh Govind; Nguyen van Buu, Olivier

2014-01-01

Brønsted acid ionic liquids (BAILs) were prepared and applied as combined acid promoters and reaction media in Pd–phosphine catalyzed methoxycarbonylation of ethylene to produce methyl propionate. The BAILs served as alternatives to common mineral acids required for the reaction, e.g. methanesulf......Brønsted acid ionic liquids (BAILs) were prepared and applied as combined acid promoters and reaction media in Pd–phosphine catalyzed methoxycarbonylation of ethylene to produce methyl propionate. The BAILs served as alternatives to common mineral acids required for the reaction, e...

f-Element Ion Chelation in Highly Basic Media

International Nuclear Information System (INIS)

Paine, Robert T.

1999-01-01

High-level radioactive waste (HLW) generated in the DOE complex is stored in tanks at several sites, but predominantly it is found at the Hanford reservation. Much of the material has been exposed to high pHs, consequently the waste exists in a complex, poorly understood mixture of solids, gels and solutions. The final waste remediation plan may involve chemical separation of fractions and a suitable, well developed molecular chemistry basis for performing these separations is not available. Indeed, the fundamental chemical behavior of most radioactive nuclides in basic media is not known. The goal of this project is to undertake fundamental studies of the coordination chemistry of f-element species in basic aqueous solutions containing common waste treatment ions (e.g., NO3 -, CO3 2-, organic carboxylates, and EDTA), as well as new waste scrubbing chelators produced in this study. The experimental agenda includes: 1. Studies of the speciation of Sr and Ln ions in basic solutions wit h and without common counterions; 2. Preparations of new multifunctional ligands that may act as strong, ion-specific chelators for Sr and/or Ln ions in basic media; and 3. Studies of the coordination and dissolution behavior of oxide-hydroxide species, as well as in insoluble sols, gels, and precipitates in combination with new chelating ligands. It is anticipated that this coordination chemistry will facilitate the design of advanced separation schemes required for handling the complex waste matrices found at the Hanford HLW facility

Media relations after the introduction of social media

OpenAIRE

Mesila, Helin

2010-01-01

In the light of the popularity of social media on one hand, and the contradictive relationships between journalists and public relations practitioners on the other hand, the thesis studies media relations after the introduction of social media. The study focuses on media relations in Estonian public relations scenery. The research answers to the questions: - What are media relations today? - What are the functions of social media and media relations in organizational communication? ...

Subjective and Objective Quality Assessment of Single-Channel Speech Separation Algorithms

DEFF Research Database (Denmark)

Mowlaee, Pejman; Saeidi, Rahim; Christensen, Mads Græsbøll

2012-01-01

Previous studies on performance evaluation of single-channel speech separation (SCSS) algorithms mostly focused on automatic speech recognition (ASR) accuracy as their performance measure. Assessing the separated signals by different metrics other than this has the benefit that the results...... are expected to carry on to other applications beyond ASR. In this paper, in addition to conventional speech quality metrics (PESQ and SNRloss), we also evaluate the separation systems output using different source separation metrics: blind source separation evaluation (BSS EVAL) and perceptual evaluation...... that PESQ and PEASS quality metrics predict well the subjective quality of separated signals obtained by the separation systems. From the results it is observed that the short-time objective intelligibility (STOI) measure predict the speech intelligibility results....

Evaluation of Social Media Utilization by Latino Adolescents: Implications for Mobile Health Interventions

Science.gov (United States)

Vyas, Amita; Turner, Monique; Glick, Sara; Wood, Susan

2015-01-01

Background Trends in social media use, including sending/receiving short message service (SMS) and social networking, are constantly changing, yet little is known about adolescent’s utilization and behaviors. This longitudinal study examines social media utilization among Latino youths, and differences by sex and acculturation. Objectives The purpose of this study was to examine Latino adolescents’ social media utilization and behavior over a 16-month period, and to assess whether changes in use differed by sex and acculturation. Methods This study included 555 Latino youths aged 13-19 who completed baseline and 16-month follow-up surveys. Prevalence of social media utilization and frequency, by sex and acculturation categories, was examined using generalized estimating equations. Results Women are more likely to use SMS, but men are significantly more likely to SMS a girl/boyfriend (P=.03). The use of Internet by men and women to research health information increased over time. Facebook use declined over time (PInstagram (P<.001) increased, especially among women and more US acculturated youths. Conclusion Social media is ubiquitous in Latino adolescents’ lives and may be a powerful mode for public health intervention delivery. PMID:26420553

Evaluation of Social Media Utilization by Latino Adolescents: Implications for Mobile Health Interventions.

Science.gov (United States)

Landry, Megan; Vyas, Amita; Turner, Monique; Glick, Sara; Wood, Susan

2015-09-29

Trends in social media use, including sending/receiving short message service (SMS) and social networking, are constantly changing, yet little is known about adolescent's utilization and behaviors. This longitudinal study examines social media utilization among Latino youths, and differences by sex and acculturation. The purpose of this study was to examine Latino adolescents' social media utilization and behavior over a 16-month period, and to assess whether changes in use differed by sex and acculturation. This study included 555 Latino youths aged 13-19 who completed baseline and 16-month follow-up surveys. Prevalence of social media utilization and frequency, by sex and acculturation categories, was examined using generalized estimating equations. Women are more likely to use SMS, but men are significantly more likely to SMS a girl/boyfriend (P=.03). The use of Internet by men and women to research health information increased over time. Facebook use declined over time (Puse of YouTube (P=.03) and Instagram (Pincreased, especially among women and more US acculturated youths. Social media is ubiquitous in Latino adolescents' lives and may be a powerful mode for public health intervention delivery.

Social Media Participation in an Activist Movement for Racial Equality.

Science.gov (United States)

De Choudhury, Munmun; Jhaver, Shagun; Sugar, Benjamin; Weber, Ingmar

2016-05-01

From the Arab Spring to the Occupy Movement, social media has been instrumental in driving and supporting socio-political movements throughout the world. In this paper, we present one of the first social media investigations of an activist movement around racial discrimination and police violence, known as "Black Lives Matter". Considering Twitter as a sensor for the broader community's perception of the events related to the movement, we study participation over time, the geographical differences in this participation, and its relationship to protests that unfolded on the ground. We find evidence for continued participation across four temporally separated events related to the movement, with notable changes in engagement and language over time. We also find that participants from regions of historically high rates of black victimization due to police violence tend to express greater negativity and make more references to loss of life. Finally, we observe that social media attributes of affect, behavior and language can predict future protest participation on the ground. We discuss the role of social media in enabling collective action around this unique movement and how social media platforms may help understand perceptions on a socially contested and sensitive issue like race.

Frontier Scientists use Modern Media

Science.gov (United States)

O'connell, E. A.

2013-12-01

Engaging Americans and the international community in the excitement and value of Alaskan Arctic discovery is the goal of Frontier Scientists. With a changing climate, resources of polar regions are being eyed by many nations. Frontier Scientists brings the stories of field scientists in the Far North to the public. With a website, an app, short videos, and social media channels; FS is a model for making connections between the public and field scientists. FS will demonstrate how academia, web content, online communities, evaluation and marketing are brought together in a 21st century multi-media platform, how scientists can maintain their integrity while engaging in outreach, and how new forms of media such as short videos can entertain as well as inspire.

A social media self-evaluation checklist for medical practitioners

NARCIS (Netherlands)

Visser, Benjamin J.; Huiskes, Florian; Korevaar, Daniel A.

2012-01-01

Increasing numbers of medical practitioners and medical students are using online social and business-related networking websites such as Facebook, Doc2doc and LinkedIn. These rapidly evolving and growing social media have potential to promote public health by providing powerful instruments for

Dynamics of a Highly Viscous Circular Blob in Homogeneous Porous Media

Directory of Open Access Journals (Sweden)

Vandita Sharma

2017-06-01

Full Text Available Viscous fingering is ubiquitous in miscible displacements in porous media, in particular, oil recovery, contaminant transport in aquifers, chromatography separation, and geological CO2 sequestration. The viscosity contrasts between heavy oil and water is several orders of magnitude larger than typical viscosity contrasts considered in the majority of the literature. We use the finite element method (FEM-based COMSOL Multiphysics simulator to simulate miscible displacements in homogeneous porous media with very large viscosity contrasts. Our numerical model is suitable for a wide range of viscosity contrasts covering chromatographic separation as well as heavy oil recovery. We have successfully captured some interesting and previously unexplored dynamics of miscible blobs with very large viscosity contrasts in homogeneous porous media. We study the effect of viscosity contrast on the spreading and the degree of mixing of the blob. Spreading (variance of transversely averaged concentration follows the power law t 3 . 34 for the blobs with viscosity ∼ O ( 10 2 and higher, while degree of mixing is found to vary non-monotonically with log-mobility ratio. Moreover, in the limit of very large viscosity contrast, the circular blob behaves like an erodible solid body and the degree of mixing approaches the viscosity-matched case.

When Can Social Media Lead Financial Markets?

Science.gov (United States)

Zheludev, Ilya; Smith, Robert; Aste, Tomaso

2014-02-01

Social media analytics is showing promise for the prediction of financial markets. However, the true value of such data for trading is unclear due to a lack of consensus on which instruments can be predicted and how. Current approaches are based on the evaluation of message volumes and are typically assessed via retrospective (ex-post facto) evaluation of trading strategy returns. In this paper, we present instead a sentiment analysis methodology to quantify and statistically validate which assets could qualify for trading from social media analytics in an ex-ante configuration. We use sentiment analysis techniques and Information Theory measures to demonstrate that social media message sentiment can contain statistically-significant ex-ante information on the future prices of the S&P500 index and a limited set of stocks, in excess of what is achievable using solely message volumes.

Staging Urban Interactions with Media Facades

DEFF Research Database (Denmark)

Brynskov, Martin; Dalsgaard, Peter; Ebsen, Tobias

2009-01-01

Using media façades as a subcategory of urban computing, this paper contributes to the understanding of spatial interaction, sense-making, and social mediation as part of identifying key characteristics of interaction with media façades. Our research addresses in particular the open......-ended but framed nature of interaction, which in conjunction with varying interpretations enables individual sense-making. Moreover, we contribute to the understanding of flexible social interaction by addressing urban interaction in relation to distributed attention, shared focus, dialogue and collective action......, and reflective evaluation of a 180 m2(1937 square feet) interactive media façade in operation 24/7 for more than 50 days....

A review of physical properties of separators for valve-regulated lead/acid batteries

Energy Technology Data Exchange (ETDEWEB)

Zguris, G.C. [Hovosorb Separators, Hollingsworth and Vose Co., West Groton, MA (United States)

1996-03-01

The microglass separator has been used from the conception of valve-regulated lead/acid (VRLA) technology. There is increasing recognition that the separator has a critical role in battery performance. Research is supporting the position that compression exerted by the separator has an important role in premature capacity loss. Some companies have suggested that the separator compression set/creep plays a critical role in the battery failure mechanism in float applications. ALABC studies have shown that designs with higher compression improve the cycle life of batteries. Increasing numbers of manufacturers are designing their separators around the end-application of the battery. The separator in a VRLA battery is not an inactive spacer/barrier, as in a flooded lead/acid cell. Instead, these separators function as a key element, the third electrode. This paper reviews aspects of the microglass separator used in VRLA batteries. Information is provided to make a better separator selection, since a 100% microglass media, or any recombinant battery separator mat (RBSM) for a VRLA battery has a critical role in assuring the performance of the battery. A poor design can thus decrease the expected life of the battery. (orig.)

Are the nonionic contrast media really safe

International Nuclear Information System (INIS)

Seyferth, W.; Zeitler, E.

1987-01-01

The authors used a wide variety of ionic and nonionic contrast media in 11,203 patient examinations (angiography, phlebography, CT). Data have been collected in prospective studies since 1982. The rate of mild side effects was reduced by a factor of 2 to 3 for all examinations when nonionic contrast media were used. Angiography may not be suitable for evaluating the safety of contrast media. Because of statistical requirements, the influence of nonionic media on the rate of severe side effects will not be known for some time. The side effects of nonionic contrast media were somewhat delayed, and differed from times reported in the literature: 29% of wide effects were noticed within 15 minutes and 71% between 25 minutes to 72 hours after the study. The final results of the study will have numerous consequences for patient treatment protocols

SOCIAL MEDIA

Science.gov (United States)

RESPONSIBILITY CENTCOM COALITION MEDIA SOCIAL MEDIA NEWS ARTICLES PRESS RELEASES IMAGERY VIDEOS TRANSCRIPTS VISITORS AND PERSONNEL FAMILY CENTER FAMILY READINESS CENTCOM WEBMAIL SOCIAL MEDIA SECURITY ACCOUNTABILITY HomeMEDIASOCIAL MEDIA Social Media CENTCOM'S ENGLISH SOCIAL MEDIA ACCOUNTS There are many U.S. military commands

Media Education: Opinions of Russian Teachers

Directory of Open Access Journals (Sweden)

Alexander Fedorov

2014-11-01

pedagogical institutes. Only when the media literate graduates of universities come to work in schools, we will be able to evaluate the position of media education within the curriculum

Evaluation of a new solid media specimen transport card for high risk HPV detection and cervical cancer prevention.

Science.gov (United States)

Maurer, Kathryn; Luo, Hongxue; Shen, Zhiyong; Wang, Guixiang; Du, Hui; Wang, Chun; Liu, Xiaobo; Wang, Xiamen; Qu, Xinfeng; Wu, Ruifang; Belinson, Jerome

2016-03-01

Solid media transport can be used to design adaptable cervical cancer screening programs but currently is limited by one card with published data. To develop and evaluate a solid media transport card for use in high-risk human papillomavirus detection (HR-HPV). The Preventative Oncology International (POI) card was constructed using PK 226 paper(®) treated with cell-lysing solution and indicating dye. Vaginal samples were applied to the POI card and the indicating FTA (iFTA) elute card. A cervical sample was placed in liquid media. All specimens were tested for HR-HPV. Color change was assessed at sample application and at card processing. Stability of the POI card and iFTA elute card was tested at humidity. 319 women were enrolled. Twelve women had at least one insufficient sample with no difference between media (p=0.36). Compared to liquid samples, there was good agreement for HR-HPV detection with kappa of 0.81 (95% CI 0.74-0.88) and 0.71 (95% CI 0.62-0.79) for the POI and iFTA elute card respectively. Sensitivity for ≥CIN2 was 100% (CI 100-100%), 95.1% (CI 92.7-97.6%), and 93.5% (CI 90.7-96.3%) for the HR-HPV test from the liquid media, POI card, and iFTA elute card respectively. There was no color change of the POI card noted in humidity but the iFTA elute card changed color at 90% humidity. The POI card is suitable for DNA transport and HR-HPV testing. This card has the potential to make cervical cancer screening programs more affordable worldwide. Copyright © 2015 Elsevier B.V. All rights reserved.

Calibration of redox potential in sperm wash media and evaluation of oxidation-reduction potential values in various assisted reproductive technology culture media using MiOXSYS system.

Science.gov (United States)

Panner Selvam, M K; Henkel, R; Sharma, R; Agarwal, A

2018-03-01

Oxidation-reduction potential describes the balance between the oxidants and antioxidants in fluids including semen. Various artificial culture media are used in andrology and IVF laboratories for sperm preparation and to support the development of fertilized oocytes under in vitro conditions. The composition and conditions of these media are vital for optimal functioning of the gametes. Currently, there are no data on the status of redox potential of sperm processing and assisted reproduction media. The purpose of this study was to compare the oxidation-reduction potential values of the different media and to calibrate the oxidation-reduction potential values of the sperm wash medium using oxidative stress inducer cumene hydroperoxide and antioxidant ascorbic acid. Redox potential was measured in 10 different media ranging from sperm wash media, freezing media and assisted reproductive technology one-step medium to sequential media. Oxidation-reduction potential values of the sequential culture medium and one-step culture medium were lower and significantly different (p value to identify the physiological range of oxidation-reduction potential that does not have any adverse effect on normal physiological sperm function. © 2017 American Society of Andrology and European Academy of Andrology.

Evaluation of starter dietary digestible lysine level on broilers raised under a sex-separated or straight-run housing regime, part 2: Economics of sex separation and digestible lysine level for maximum returns.

Science.gov (United States)

Da Costa, M J; Colson, G; Frost, T J; Halley, J; Pesti, G M

2017-09-01

The objective of this experiment was to determine the maximum net returns digestible lysine (dLys) levels (MNRL) when maintaining the ideal amino acid ratio for starter diets of broilers raised sex separate or comingled (straight-run). A total of 3,240 Ross 708 chicks was separated by sex and placed in 90 pens by 2 rearing types: sex separate (36 males or 36 females) or straight-run (18 males + 18 females). Each rearing type was fed 6 starter diets (25 d) formulated to have dLys levels between 1.05 and 1.80%. A common grower diet with 1.02% of dLys was fed from 25 to 32 days. Body weight gain (BWG) and feed intake were assessed at 25 and 32 d for performance evaluation. Additionally, at 26 and 33 d, 4 birds per pen were sampled for carcass yield evaluation. Data were modeled using response surface methodology in order to estimate feed intake and whole carcass weight at 1,600 g live BW. Returns over feed cost were estimated for a 1.8-million-broiler complex of each rearing system under 9 feed/meat price scenarios. Results indicated that females needed more feed to reach market weight, followed by straight-run birds, and then males. At medium meat and feed prices, female birds had MNRL at 1.07% dLys, whereas straight-run and males had MNRL at 1.05%. As feed and meat prices increased, females had MNRL increased up to 1.15% dLys. Sex separation resulted in increased revenue under certain feed and meat prices, and before sex separation cost was deducted. When the sexing cost was subtracted from the returns, sex separation was not shown to be economically viable when targeting birds for light market BW. © 2017 Poultry Science Association Inc.

Extraction of zirconium(IV) and separation of 95Zr-95Nb from acidic thiocyanate media by LIX 54 and its mixtures with TBP

International Nuclear Information System (INIS)

Mishra, P.K.; Chakravortty, V.; Dash, K.C.; Das, N.R.; Bhattacharyya, S.N.

1990-01-01

Appreciable extraction of 95 Zr- 95 Nb by LIX 54 from aqueous HCl alone is not observed in the concentration range from 0.1 to 2 M HCl. Presence of thiocyanate ions results in appreciable extraction of this pair from such acid medium. Synergism has been observed in the extraction of zirconium(IV) by mixtures of LIX 54 and TBP from thiocyanate media, whereas there has been no appreciable synergism in case of niobium(V) under identical conditions. Slope analyses indicate the species extracted by pure TBP to be disolvate whereas for extraction by the mixtures of LIX 54 and TBP it is found to be monosolvate with respect to TBP. The extraction of both the metal ions have been found to depend on the concentration of acid as well as that of thiocyanate ions. Extraction increases with increase in percentage of either of the extractants. Effective separation of these congeneric pairs has been achieved by suitable choice of above system. Extraction is independent of aq. zirconium concentration up to 0.01 M above which it decreases. (orig.)

Validation of the Otitis Media-6 Questionnaire for European Portuguese

Directory of Open Access Journals (Sweden)

Ana Rita Lameiras

2017-05-01

Conclusion: The Portuguese version of the Otitis Media-6 questionnaire is a valid, reliable and sensitive instrument to evaluate the health-related quality of life in Portuguese children with otitis media.

Mars Atmospheric Capture and Gas Separation

Science.gov (United States)

Muscatello, Anthony; Santiago-Maldonado, Edgardo; Gibson, Tracy; Devor, Robert; Captain, James

2011-01-01

The Mars atmospheric capture and gas separation project is selecting, developing, and demonstrating techniques to capture and purify Martian atmospheric gases for their utilization for the production of hydrocarbons, oxygen, and water in ISRU systems. Trace gases will be required to be separated from Martian atmospheric gases to provide pure C02 to processing elements. In addition, other Martian gases, such as nitrogen and argon, occur in concentrations high enough to be useful as buffer gas and should be captured as welL To achieve these goals, highly efficient gas separation processes will be required. These gas separation techniques are also required across various areas within the ISRU project to support various consumable production processes. The development of innovative gas separation techniques will evaluate the current state-of-the-art for the gas separation required, with the objective to demonstrate and develop light-weight, low-power methods for gas separation. Gas separation requirements include, but are not limited to the selective separation of: (1) methane and water from un-reacted carbon oxides (C02- CO) and hydrogen typical of a Sabatier-type process, (2) carbon oxides and water from unreacted hydrogen from a Reverse Water-Gas Shift process, (3) carbon oxides from oxygen from a trash/waste processing reaction, and (4) helium from hydrogen or oxygen from a propellant scavenging process. Potential technologies for the separations include freezers, selective membranes, selective solvents, polymeric sorbents, zeolites, and new technologies. This paper and presentation will summarize the results of an extensive literature review and laboratory evaluations of candidate technologies for the capture and separation of C02 and other relevant gases.

Separation of DR synthesized Ti-Mg Alloy by dissolution of waste by-products in acid media

CSIR Research Space (South Africa)

Mushove, T

2010-06-01

Full Text Available The objective of this work is to isolate synthesized Ti-Mg alloy powder through leaching out of MgO and any unreduced oxides of Titanium. Leaching media investigated are H2SO4, HCl and organic acids ascorbic acid/oxalic and L-cysteine /ascorbic...

Recurrent acute otitis media detracts from health-related quality of life.

Science.gov (United States)

Kujala, T; Alho, O-P; Kristo, A; Uhari, M; Renko, M; Pokka, T; Koivunen, P

2017-02-01

Acute otitis media causes discomfort to children and inconvenience to their parents. This study evaluated the quality of life in children with recurrent acute otitis media aged less than 24 months. Quality of life was evaluated in 149 children aged 10 to 24 months who were referred to the Oulu University Hospital on account of recurrent acute otitis media. The children were treated with or without surgery. Age-matched controls were selected randomly from the general child population. Parents completed the Child Health Questionnaire. The children with recurrent acute otitis media had a significantly poorer quality of life than control children. The control children with a history of a few acute otitis media episodes had a significantly poorer quality of life than those without any such history. The quality of life of the children with recurrent acute otitis media improved during the one-year follow up, regardless of the treatment, but did not reach the same level as healthy children. Acute otitis media detracted from quality of life when a generic measure was used. The mode of treatment used to prevent further recurrences of acute otitis media did not influence quality of life improvement.

Fast propagation of electromagnetic fields through graded-index media.

Science.gov (United States)

Zhong, Huiying; Zhang, Site; Shi, Rui; Hellmann, Christian; Wyrowski, Frank

2018-04-01

Graded-index (GRIN) media are widely used for modeling different situations: some components are designed considering GRIN modulation, e.g., multi-mode fibers, optical lenses, or acousto-optical modulators; on the other hand, there are other components where the refractive-index variation is undesired due to, e.g., stress or heating; and finally, some effects in nature are characterized by a GRIN variation, like turbulence in air or biological tissues. Modeling electromagnetic fields propagating in GRIN media is then of high importance for optical simulation and design. Though ray tracing can be used to evaluate some basic effects in GRIN media, the field properties are not considered and evaluated. The general physical optics techniques, like finite element method or finite difference time domain, can be used to calculate fields in GRIN media, but they need great numerical effort or may even be impractical for large-scale components. Therefore, there still exists a demand for a fast physical optics model of field propagation through GRIN media on a large scale, which will be explored in this paper.

Social media audits achieving deep impact without sacrificing the bottom line

CERN Document Server

Gattiker, Urs E

2014-01-01

Social media is quickly becoming important to most businesses, but many managers, professionals, and marketing experts are unsure about the practicalities of social media marketing and how to measure success. Social Media Audits gives people dealing with social business in their working life a guide to social media marketing, measurement, and how to evaluate and improve the use of social media in an organizational context. This book consists of three parts, the first of which introduces the reader to concepts and ideas emerging in social media. The second part considers the need to shift from

CLASSICAL MEDIA RELATIONS AND NEW MEDIA RELATIONS IN SPORT

Directory of Open Access Journals (Sweden)

Alexandru Lucian MIHAI

2014-06-01

Full Text Available Media relations in sport mean maintenance of networks and positive relationships with people in the media to obtain positive media exposure for a sport product (informal and formal information sessions with media representatives. Because of the pervasive influence the media has on marketing success, sport marketers must make concerted efforts to create a positive relationship between their sport event and the media. They may accomplish this by providing the media with press releases, having news conferences, having media-day events (in which the media are invited to interact with the players, coaches, and administrators, providing media guides for the respective sport events and so on. Each of these activities promotes active involvement from the media, which will subsequently contribute to relationship building with the community.

Social media use among patients and caregivers: a scoping review.

Science.gov (United States)

Hamm, Michele P; Chisholm, Annabritt; Shulhan, Jocelyn; Milne, Andrea; Scott, Shannon D; Given, Lisa M; Hartling, Lisa

2013-05-09

To map the state of the existing literature evaluating the use of social media in patient and caregiver populations. Scoping review. Medline, CENTRAL, ERIC, PubMed, CINAHL Plus Full Text, Academic Search Complete, Alt Health Watch, Health Source, Communication and Mass Media Complete, Web of Knowledge and ProQuest (2000-2012). Studies reporting primary research on the use of social media (collaborative projects, blogs/microblogs, content communities, social networking sites, virtual worlds) by patients or caregivers. Two reviewers screened studies for eligibility; one reviewer extracted data from relevant studies and a second performed verification for accuracy and completeness on a 10% sample. Data were analysed to describe which social media tools are being used, by whom, for what purpose and how they are being evaluated. Two hundred eighty-four studies were included. Discussion forums were highly prevalent and constitute 66.6% of the sample. Social networking sites (14.8%) and blogs/microblogs (14.1%) were the next most commonly used tools. The intended purpose of the tool was to facilitate self-care in 77.1% of studies. While there were clusters of studies that focused on similar conditions (eg, lifestyle/weight loss (12.7%), cancer (11.3%)), there were no patterns in the objectives or tools used. A large proportion of the studies were descriptive (42.3%); however, there were also 48 (16.9%) randomised controlled trials (RCTs). Among the RCTs, 35.4% reported statistically significant results favouring the social media intervention being evaluated; however, 72.9% presented positive conclusions regarding the use of social media. There is an extensive body of literature examining the use of social media in patient and caregiver populations. Much of this work is descriptive; however, with such widespread use, evaluations of effectiveness are required. In studies that have examined effectiveness, positive conclusions are often reported, despite non

Reliability Omnipotent Analysis For First Stage Separator On The Separation Process Of Gas, Oil And Water

International Nuclear Information System (INIS)

Sony Tjahyani, D. T.; Ismu W, Puradwi; Asmara Santa, Sigit

2001-01-01

Reliability of industry can be evaluated based on two aspects which are risk and economic aspects. From these points, optimation value can be determined optimation value. Risk of the oil refinery process are fire and explosion, so assessment of this system must be done. One system of the oil refinery process is first stage separator which is used to separate gas, oil and water. Evaluation of reliability for first stage separator system has been done with FAMECA and HAZap method. The analysis results, the probability of fire and explosion of 1.1x10 - 2 3 /hour and 1.2x10 - 1 1 /hour, respectively. The reliability value of the system is high because each undesired event is anticipated with safety system or safety component

[Evaluation of Storage Performance of Preserving Bags for Manually Separated Platelets].

Science.gov (United States)

Liu, Min-Xia; Duan, Lan; Wang, Jie-Xi; Wang, Yan; Zhuo, Hai-Long; Cai, Li-Na; Yi, Xiao-Yang; Zhou, Jian-Wei; Ang, Jian-Wei; Han, Ying

2015-08-01

To evaluate the storage performance of the domestically made platelet storage bags (experimental group) and the United States Trima set platelet storage bags (control group). The manually separated platelets were divided in two equal parts, which was added to control blood bags and experimental blood bags respectively, all samples were stored at a 22 °C ± 2 °C. The platelet count, mean volume, aggregation activity (ADP, THR), pH, glucose, lactate concentration, lactate dehydrogenase concentration, hypotonic shock reaction, CD62P and phosphatidic acid serine content were detected at day 0, 3, 5 and 7 of storage. There was no significant difference of platelet quality at day 5 after storage between the experimental group and the control group (T-test, P > 0.05). Two kinds of platelet storage bags have the similar storage performance.

Media education and media influence on youth

OpenAIRE

LILÁK, Karel

2011-01-01

Bachelor´s work is focused on the questions of the medial education and the medias themselves. This work also investigate with the influence of the action of medias to the students of apprenticeship. The first part of the theoretical work has generally explains what is media education, what is its significance for society and for the benefit of education in school. They are given functions, types and objectives of media education and communications capabilities via the media. The second part ...

Assessment of parameters of gas centrifuge and separation cascade basing on integral characteristics of separation plant

Energy Technology Data Exchange (ETDEWEB)

Borisevich, Valentin, E-mail: VDBorisevich@mephi.ru [National Research Nuclear University MEPhI, Kashirskoe Shosse 31, Moscow 115409 (Russian Federation); National Research Center “Kurchatov Institute”, Kurchatov Square 1, Moscow 123182 (Russian Federation); Borshchevskiy, Michael, E-mail: Michael_mephi@mail.ru [National Research Nuclear University MEPhI, Kashirskoe Shosse 31, Moscow 115409 (Russian Federation); Andronov, Igor, E-mail: andronov@imp.kiae.ru [National Research Center “Kurchatov Institute”, Kurchatov Square 1, Moscow 123182 (Russian Federation); Senchenkov, Sergey, E-mail: senchenkov@imp.kiae.ru [National Research Center “Kurchatov Institute”, Kurchatov Square 1, Moscow 123182 (Russian Federation)

2013-12-15

Highlights: • We developed the calculation method to assess a feed flow rate into a gas centrifuge. • It is based on the knowledge of the integral characteristics of a separation plant. • Our method is verified by comparison with the results of the independent one. • The method also allows to specify other features of the separation cascade work. - Abstract: A calculation technique to assess a feed flow rate into a single GC, a total number of centrifuges in a separation cascade and to determine its likely configurations basing on the known integral characteristics of a centrifugal plant is developed. Evaluation of characteristics of the industrial gas centrifuge TC-12 and separation cascades of the NEF plant performed by two independent calculation techniques demonstrates their satisfactory agreement. This methodology would help to some extent the nuclear inspectors in evaluating and assessing the capability of an enrichment facility, and discovering any use for undeclared purposes.

Graduating student pharmacists' perspectives on e-professionalism and social media: qualitative findings.

Science.gov (United States)

Ness, Genevieve Lynn; Sheehan, Amy Heck; Snyder, Margie E

2014-01-01

OBJECTIVE To characterize students' views and opinions of professionalism on popular social media sites and compare responses about social media behavior among students in different groups. DESIGN Cross-sectional survey. SETTING Four colleges of pharmacy in midwestern United States. PARTICIPANTS 516 graduating student pharmacists. INTERVENTIONS Online survey with open-ended questions. MAIN OUTCOME MEASURES Qualitative analysis of responses and themes. RESULTS A total of 212 student pharmacists completed surveys (41% response rate). Mean (± SD) age was 25.2 ± 4.6 years, and 72% of respondents were women. Major overarching themes identified in the qualitative analysis were separation of personal and professional lives, how accountability for actions should vary by severity, and the extent of representation of the students' character on social media. CONCLUSION Identified themes provided important insights into the ways in which student pharmacists view social media and use this widely accessible means of personal communication.

Model of two-temperature convective transfer in porous media

Science.gov (United States)

Gruais, Isabelle; Poliševski, Dan

2017-12-01

In this paper, we study the asymptotic behaviour of the solution of a convective heat transfer boundary problem in an ɛ -periodic domain which consists of two interwoven phases, solid and fluid, separated by an interface. The fluid flow and its dependence with respect to the temperature are governed by the Boussinesq approximation of the Stokes equations. The tensors of thermal diffusion of both phases are ɛ -periodic, as well as the heat transfer coefficient which is used to describe the first-order jump condition on the interface. We find by homogenization that the two-scale limits of the solutions verify the most common system used to describe local thermal non-equilibrium phenomena in porous media (see Nield and Bejan in Convection in porous media, Springer, New York, 1999; Rees and Pop in Transport phenomena in porous media III, Elsevier, Oxford, 2005). Since now, this system was justified only by volume averaging arguments.

DIGITAL LOYALTY FOR SOCIAL MEDIA, A CASE STUDY ON BOXPLOSIVE B.V.

Directory of Open Access Journals (Sweden)

Christopher Pandoyo

2017-01-01

Full Text Available Digital loyalty is the process of providing incentives to customers through digital media to increase customer loyalty. Nowadays, Boxplosive B.V. using app to distribute deal and saver cards from retailers like AH to go and Etos to their customer. But the problem is that not all the customers are willing to download the app. To overcome this problem, this research investigate how social media app can be used for distributing deal and saver card. Therefore, a prototype program will be built for the implementation to show that social media app can be used for business purposes. The result shows that now the customer do not need to download the separate apps to get the deas and saver card.

Thermally assisted acoustofluidic separation of extracellular vesicles from cells

Science.gov (United States)

Mirtaheri, Elnaz; Dolatmoradi, Ata; Pimentel, Krystine; Bhansali, Shekhar; El-Zahab, Bilal

2018-02-01

Extracellular vesicles (EVs) have been gaining increasing attention given their role in communicating information between cells. Composition-based isolation of EVs is particularly of high significance as the proteomic and lipidomic characterization of their cargo could provide valuable clues to the role of EVs in mediating the biology of various conditions. This has, however, proved to be challenging as EVs, despite their abundance, are very small and difficult to be differentiated from the other constituents of host media. In addition, currently available methods like ultracentrifugation and filtration are cumbersome and capable of achieving mostly size-based separations. In this work, we demonstrate the possibility of separating submicron EV-like vesicles from cancer cells using a thermally-assisted acoustophoretic device. In a system composed of MCF-7 breast cancer cells spiked with two different types of same-size vesicles, composition-based isolation of vesicles was shown to be realizable through opposite focusing of the system's components at the node and antinodes of the overlaid ultrasonic standing wave. By proper choice of temperature in the microchannel, we were able to achieve separations with purities exceeding 93%. Furthermore, cells recovered from the channel were shown to be viable after the separation.

Evaluation of Force Degradation Pattern of Elastomeric Ligatures and Elastomeric Separators in Active Tieback State

Directory of Open Access Journals (Sweden)

Amir Mohammadi

2015-12-01

Full Text Available Background and aims. The purpose of this study was to evaluate initial force and force decay of commercially available elastomeric ligatures and elastomeric separators in active tieback state in a simulated oral environment. Materials and methods. A total of 288 elastomeric ligatures and elastomeric separators from three manufacturers (Dentaurum, RMO, 3M Unitek were stretched to 100% and 150% of their original inner diameter. Force levels were measured initially and at 3-minute, 24-hour, and 1-, 2-, 3- and 4-week intervals. Data were analyzed by univariate analysis of variance and a post hoc Tukey test. Results. The means of initial forces of elastomeric ligatures and separators from three above-mentioned companies, when stretched to 100% of their inner diameters, were 199, 305 and 284 g, and 330, 416, 330 g; when they were stretched to 150% of their inner diameters the values were 286, 422 and 375 g, and 433, 540 and 504 g, respectively. In active tieback state, 11‒18% of the initial force of the specimens was lost within the first 3 minutes and 29‒63% of the force decay occurred in the first 24 hours; then force decay rate decreased. 62‒81% of the initial force was lost in 4 weeks. Although force decay pattern was identical in all the products, the initial force and force decay of Dentaurum elastomeric products were less than the similar products of other companies (P<0.05. Under the same conditions, the force of elastomeric separators was greater than elastomeric ligatures of the same company. Conclusion. Regarding the force pattern of elastomeric ligatures and separators and optimal force for tooth movement, many of these products can be selected for applying orthodontic forces in active tieback state.

Audit stakeholder media market: the need for and characteristics of the organization

Directory of Open Access Journals (Sweden)

S.V. Bardash

2016-12-01

Full Text Available Active Ukraine media market development and its integration into the global market space cause a number of problems faced by scientists and practitioners in the fild of audit organizing of firms that saturate this market sector. The market research problems and organizing business parameters audit in this market are segmental in nature as the vast majority of work media market, accounting of its financial performance and its audit are dealt with separately, thus leaving aside the causal link between the trends of the industry and the specifics of audit of its subjects who in their turn represent different legal forms. The article deals with domestic and foreign experience of media market development for using it as marketing communications tools. The study takes the media companies organizational form as the basis for organizing and holding internal and external audits. The article summarizes the list of domestic audit challenges that accompany media market globalization. Therefore, the system that would efficiently respond to these challenges and, thereby, ensure effective company operation has great significance for the subjects of the media market taking into account their legal status and type of business.

Oily Bilgewater Separators

Science.gov (United States)

2011-11-01

11 3.3.4 Flotation ...Flocculation, • Flotation , and • Ultrafiltration . EPA evaluated the effectiveness of bilge separators by their ability to achieve low effluent oil...parameters, suspended solids), metals (arsenic, copper , cadmium, chromium, lead, mercury, selenium and zinc) and organics (benzene, chloroform

Media(ted) fabrications: how the science-media symbiosis helped 'sell' cord banking.

Science.gov (United States)

Michelle, Carolyn

2006-01-01

This paper considers the problematic role of the science-media symbiosis in the dissemination of misleading and emotionally manipulative information regarding services offered by CordBank, New Zealand's only umbilical cord blood banking facility. As this case study illustrates, the growing reliance of health and science reporters on the knowledge capital of medical specialists, biogenetic researchers, and scientists potentially enhances the ability of 'expert' sources to set the agenda for media representations of emerging medical and scientific developments, and may undermine the editorial independence of journalists and editors, many of whom in this case failed to critically evaluate deeply problematic claims regarding the current and future benefits of cord banking. Heavy reliance on established media frames of anecdotal personalization and technoboosterism also reinforced a proscience journalistic culture in which claims by key sources were uncritically reiterated and amplified, with journalistic assessments of the value of cord banking emphasizing potential benefits for individual consumers. It is argued that use of these media frames potentially detracts from due consideration of the broader social, ethical, legal, and health implications of emerging biomedical developments, along with the professional, personal, and increasingly also financial interests at stake in their public promotion, given the growing commercialization of biogenetic technologies.

High-Pressure Liquid Chromatography of Irradiated Nuclear Fue - Separation of Neodymium for Burn-up Determination

DEFF Research Database (Denmark)

Larsen, N. R.

1979-01-01

Neodymium is separated from solutions of spent nuclear fuel by high-pressure liquid chromatography in methanol-nitric acid-water media using an anion-exchange column. Chromatograms obtained by monitoring at 280 nm, illustrate the difficulties especially with the fission product ruthenium in nuclear...

Ugandan Adolescents' Sources, Interpretation and Evaluation of Sexual Content in Entertainment Media Programming

Science.gov (United States)

Miller, Ann Neville; Nalugya, Evangeline; Gabolya, Charles; Lagot, Sarah; Mulwanya, Richard; Kiva, Joseph; Nabasaaka, Grace; Chibita, Monica

2016-01-01

Although mounting evidence in Western nations indicates that entertainment media influence young people's sexual socialisation, virtually no research has addressed the topic in sub-Saharan Africa. The present study employed 14 focus groups of Ugandan high school students to identify media through which they were exposed to sexual content, how they…

The influence of media suggestions about links between criminality and autism spectrum disorder.

Science.gov (United States)

Brewer, Neil; Zoanetti, Jordana; Young, Robyn L

2017-01-01

We examined whether media reports linking criminal behaviour and autism spectrum disorder foster negative attitudes towards individuals with autism spectrum disorder. In a between-subjects design, participants were exposed to (a) a media story in which a murderer was labelled with autism spectrum disorder (media exposure condition) or not labelled with any disorder (control) and (b) an autism spectrum disorder-education condition attacking the myth that people diagnosed with autism spectrum disorder are likely to be violent criminals or a no-autism spectrum disorder-education condition. Participants attitudes towards three different crime perpetrators (one with autism spectrum disorder) described in separate vignettes were probed. The media exposure linking crime and autism spectrum disorder promoted more negative attitudes towards individuals with autism spectrum disorder, whereas the positive autism spectrum disorder-related educational message had the opposite effect. © The Author(s) 2016.

Increased carotid intima thickness and decreased media thickness in premenopausal women with systemic lupus erythematosus: an investigation by non-invasive high-frequency ultrasound.

Science.gov (United States)

Leonard, D; Akhter, T; Nordmark, G; Rönnblom, L; Naessen, T

2011-01-01

To determine whether high-frequency ultrasound (US) yielding separate assessments of intima and media thickness gives additional information about the vascular morphology compared with the total common carotid artery intima-media thickness (CCA-IMT). Using a 22 MHz US instrument, we determined the near-wall CCA-IMT, the intima and media layers, and the intima/media (I/M) ratio in 47 premenopausal women with systemic lupus erythematosus (SLE), 20 healthy women, and 17 postmenopausal women (mean ages 37, 40, and 69 years, respectively). In SLE, the carotid intima was thicker (0.19 ± 0.04 vs. 0.12 ± 0.02 mm), the media thinner (0.45 ± 0.12 vs. 0.68 ± 0.24 mm), the I/M ratio higher (0.45 ± 0.17 vs. 0.20 ± 0.07) (all p women (0.19 ± 0.04 vs. 0.14 ± 0.03 mm, p media, and a higher I/M ratio in women with SLE compared to healthy controls and indicated an artery wall status in SLE comparable to 30-years-older healthy women. Separate estimates of carotid intima and media layers may be preferable to CCA-IMT in SLE patients.

Evaluation of a Health and Fitness Social Media Experience

Science.gov (United States)

Frimming, Renee E.; Polsgrove, Myles Jay; Bower, Glenna G.

2011-01-01

Background: University health and fitness faculty members are continually striving to enhance the health knowledge of their students. Purpose: The purpose of this case study was to survey student reflections of a social media experience. Methods: Students were placed into one of two groups: Learners (N = 92) or Pre-Service Health and Fitness…

Mediatized participation and forms of media use and multiple meaning making: the Baltic perspective

OpenAIRE

Balčytienė, Auksė; Vinciūnienė, Aušra; Auškalnienė, Lina

2012-01-01

In this paper all arguments move around the idea that there is a very close interrelationship between the status of being an informed citizen, and public participation, activism and engagement in social life. For that reason, contemporary media are seen not just as separate channels representing ideas and interests of different groups and social divisions of society. While providing news and information, and conveying common values and ideals, any media has potential to gather people with sim...

Music goes social! : music startups' viewpoints on marketing communications, social media and music industry

OpenAIRE

Vermasheinä, Kaisa

2011-01-01

This thesis studies Finnish music industry startups’ viewpoints on marketing communica-tions and social media, as well as their views on the future of the music business. Four Finland based music industry startups were interviewed for the study. Separate chapters deal with the framework of the study: marketing communications, social media and music industry. During the past few years a number of startup companies have been established in Finland with the aim of providing online and digit...

Influence of radiographic contrast media on phagocytosis

International Nuclear Information System (INIS)

Rasmussen, F.; Georgsen, J.; Grunnet, N.; Aalborg Sygehus

1988-01-01

To evaluate the influence of radiographic contrast media (CM) on human polymorphonuclear leucocytes (PML), the ability of these cells to ingest latex particles after in vitro exposure to five different radiographic contrast media was investigated. All CM inhibited the phagocytic properties of PML. The inhibition was dose dependent. The inhibitory effect was partly due to hyperosmolality but CM specific inhibition was also evident. (orig.)

POI Summarization by Aesthetics Evaluation From Crowd Source Social Media.

Science.gov (United States)

Qian, Xueming; Li, Cheng; Lan, Ke; Hou, Xingsong; Li, Zhetao; Han, Junwei

2018-03-01

Place-of-Interest (POI) summarization by aesthetics evaluation can recommend a set of POI images to the user and it is significant in image retrieval. In this paper, we propose a system that summarizes a collection of POI images regarding both aesthetics and diversity of the distribution of cameras. First, we generate visual albums by a coarse-to-fine POI clustering approach and then generate 3D models for each album by the collected images from social media. Second, based on the 3D to 2D projection relationship, we select candidate photos in terms of the proposed crowd source saliency model. Third, in order to improve the performance of aesthetic measurement model, we propose a crowd-sourced saliency detection approach by exploring the distribution of salient regions in the 3D model. Then, we measure the composition aesthetics of each image and we explore crowd source salient feature to yield saliency map, based on which, we propose an adaptive image adoption approach. Finally, we combine the diversity and the aesthetics to recommend aesthetic pictures. Experimental results show that the proposed POI summarization approach can return images with diverse camera distributions and aesthetics.

Study on the Effect of the Separating Unit Optimization on the Economy of Stable Isotope Separation

Directory of Open Access Journals (Sweden)

YANG Kun

2015-01-01

Full Text Available An economic criterion called as yearly net profit of single separating unit (YNPSSU was presented to evaluate the influence of structure optimization on the economy. Using YNPSSU as a criterion, economic analysis was carried out for the structure optimization of separating unit in the case of separating SiF4 to obtain the 28Si and 29Si isotope. YNPSSU was calculated and compared with that before optimization. The results showed that YNPSSU was increased by 12.3% by the structure optimization. Therefore, the structure optimization could increase the economy of the stable isotope separation effectively.

Evaluation of the Efficiency of Two Different Freezing Media and Two Different Protocols to Preserve Human Spermatozoa from Cryoinjury

Directory of Open Access Journals (Sweden)

Gemma Fabozzi

2016-01-01

Full Text Available It is universally recognized that cryopreservation impairs sperm quality. In order to improve postthawing sperm survival and motility, media of different composition and different protocols have been proposed. However, no clear evidence is available to understand which are the most efficient protocol and medium for sperm cryopreservation. The present study evaluates the efficiency of two different cryopreservation protocols and two common freezing media (FM containing different cryoprotectants (CPs, TEST Yolk Buffer (TYB and Sperm Freeze (SF, to preserve human sperm quality. Our data suggest that TYB is better than SF both in terms of postthaw viability and in terms of progressive motility, while the direct addition of FM to the sperm sample resulted in the most efficient protocol in terms of postthaw viability but not in terms of progressive motility.

MENGEMBANGKAN KETERAMPILAN BERPIKIR TINGKAT TINGGI MAHASISWA MELALUI MEDIA SOSIAL

OpenAIRE

R Nadia Hanoum

2014-01-01

Abstract. Social media allow their users to share, collaborate, and making network more flexibly without having to be in the same place and time. The use of social media in learning gives students more opportunities to interact and exchange information with each other through various activities like discussion, peer correction, and peer evaluation. Viewing from social learning and social constructivism theories, using social media in learning will affect students’ behavior and learning outcom...

Social Media Marketing in Fast Moving Consumer Goods Industry

OpenAIRE

Huber, Markus

2014-01-01

The aim of this master thesis is to analyze the social media engagement of the FMCGs (Fast Moving Consumer Goods) in Austria. The used methodologies are literature studies, Internet searches as well as internal data evaluations of the FMCG clients of a marketing agency. The thesis analyses selected key success factors on Social Media focusing on facebook, evaluates their development in the monitored period, and recommends main possibilities of future measures aiming on reaching an improvement...

Naive Bayes as opinion classifier to evaluate students satisfaction based on student sentiment in Twitter Social Media

Science.gov (United States)

Candra Permana, Fahmi; Rosmansyah, Yusep; Setiawan Abdullah, Atje

2017-10-01

Students activity on social media can provide implicit knowledge and new perspectives for an educational system. Sentiment analysis is a part of text mining that can help to analyze and classify the opinion data. This research uses text mining and naive Bayes method as opinion classifier, to be used as an alternative methods in the process of evaluating studentss satisfaction for educational institution. Based on test results, this system can determine the opinion classification in Bahasa Indonesia using naive Bayes as opinion classifier with accuracy level of 84% correct, and the comparison between the existing system and the proposed system to evaluate students satisfaction in learning process, there is only a difference of 16.49%.

Study on a particle separator using ultrasonic wave

International Nuclear Information System (INIS)

Lee, Young Seop; Kwon, Jae Hwa; Seo, Dae Chul; Yun, Dong Jin

2005-01-01

This paper presents the theory, design and evaluation of a smart device for the enhanced separation of particles mixed in fluid. The smart device takes advantage of the ultrasonic standing wave, which was generated by the operation of a piezoceramic PZT patch installed in the smart device. The details of the device design including the electro-acoustical modelling for separation and PZT transducer are described at the first. Based on this design, the separation device was fabricated and evaluated. In the experiments, an optical camera with a zoom lense was used to monitor the position of interested particles within the separation channel layer in the device. The electric impedance of the PZT patch bonded on the separation device was measured. The device shows a strong levitation and separation force against 50m diameter particles mixed with water at the separation channel in the device. Experimental results also showed that the device can work at both heavy and light sand particles mixed with water due to the generated standing wave field in the separation channel.

Media identities and media-influenced indentifications Visibility and identity recognition in the media

Directory of Open Access Journals (Sweden)

Víctor Fco. Sampedro Blanco

2004-10-01

Full Text Available The media establish, in large part, the patterns of visibility and public recognition of collective identities. We define media identities as those that are the object of production and diffusion by the media. From this discourse, the communities and individuals elaborate media-influenced identifications; that is, processes of recognition or banishment; (rearticulating the identity markers that the media offer with other cognitive and emotional sources. The generation and appropriation of the identities are subjected to a media hierarchisation that influences their normalisation or marginalisation. The identities presented by the media and assumed by the audience as part of the official, hegemonic discourse are normalised, whereas the identities and identifications formulated in popular and minority terms are marginalised. After presenting this conceptual and analytical framework, this study attempts to outline the logics that condition the presentation, on the one hand, andthe public recognition, on the other hand, of contemporary identities.

Survey: Research on QoS of P2P Reliable Streaming Media

OpenAIRE

Xiaofeng Xiong; Jiajia Song; Guangxue Yue; Jiansheng Liu; Linquan Xie

2011-01-01

Streaming media application has become one of the main services over Internet. As streaming media have special attributes, it is very important to ensure and improve the quality of service in large-scale streaming media. Based on the development of media streaming, it compared and analyzed the typical flow service strategy of media streaming system, and summarized the features and shortcomings of different systems. Moreover, it take the reputation evaluation, node selection, strategy of copy ...

The Role of Mass Media in the Delivery of Adult Education for ...

African Journals Online (AJOL)

We live in a global world where everyone is interconnected. Investment in the education of adults which will eventually lead to skills development, information and communication technologies, and capital formation at the grassroots level through the mass media cannot be understated. The main thing that separates ...

On-line separation of Pu(III) and Am(III) using extraction and ion chromatography

International Nuclear Information System (INIS)

Jernstroem, J.; Lehto, J.; Betti, M.

2007-01-01

An on-line method developed for separating plutonium and americium was developed. The method is based on the use of HPLC pump with three analytical chromatographic columns. Plutonium is reduced throughout the procedure to trivalent oxidation state, and is recovered in the various separation steps together with americium. Light lanthanides and trivalent actinides are separated with TEVA resin in thiocyanate/formic acid media. Trivalent plutonium and americium are pre-concentrated in a TCC-II cation-exchange column, after which the separation is performed in CS5A ion chromatography column by using two different eluents. Pu(III) is eluted with a dipicolinic acid eluent, and Am(III) with oxalic acid eluent. Radiochemical and chemical purity of the eluted plutonium and americium fractions were ensured with alpha-spectrometry. (author)

Further evaluation of the CSNI separate effect test activity

Energy Technology Data Exchange (ETDEWEB)

D`Auria, F.; Aksan, S.N.; Glaeser, H. [and others

1995-09-01

An internationally agreed Separate Effect Test (SET) Validation Matrix for the thermalhydraulic system codes has been established by a subgroup of the Task Group on Thermalhydraulic System Behaviour as requested by OECD/NEA Committee on the Safety of Nuclear Installations (CSNI) Principal Working Group No. 2 on Coolant System Behavior. The construction of such matrix constituted an attempt to collect together in a systematic way the best sets of openly available test data to select for code validation. As a final result, 67 phenomena have been identified and characterized, roughly 200 facilities have been considered and more than 1000 experiments have been selected as useful for the validation of the codes. The objective of the present paper is to provide additional evaluation of the obtained data base and to supply an a-posteriori judgement in relation to (a) the data base adequacy, (b) the phenomenon, and (c) the need for additional experiments. This has been provided independently by each of the authors. The main conclusions are that large amount of data are available for certain popular phenomena e.g. heat transfer, but data are severely lacking in more esoteric areas e.g. for characterizing phenomena such as parallel channel instability and boron mixing and transport.

Use of Propensity Score Matching to Evaluate a National Smoking Cessation Media Campaign

Science.gov (United States)

Villanti, Andrea C.; Cullen, Jennifer; Vallone, Donna M.; Stuart, Elizabeth A.

2011-01-01

Sustained mass media campaigns have been recommended to stem the tobacco epidemic in the United States. Propensity score matching (PSM) was used to estimate the effect of awareness of a national smoking cessation media campaign (EX[R]) on quit attempts and cessation-related cognition. Participants were 4,067 smokers and recent quitters aged 18-49…

Suicide and the media. Part III: Theoretical issues.

Science.gov (United States)

Blood, R W; Pirkis, J

2001-01-01

The body of evidence suggests that there is a causal association between nonfictional media reporting of suicide (in newspapers, on television, and in books) and actual suicide, and that there may be one between fictional media portrayal (in film and television, in music, and in plays) and actual suicide. This finding has been explained by social learning theory. The majority of studies upon which this finding is based fall into the media "effects tradition," which has been criticized for its positivist-like approach that fails to take into account of media content or the capacity of audiences to make meaning out of messages. A cultural studies approach that relies on discourse and frame analyses to explore meanings, and that qualitatively examines the multiple meanings that audiences give to media messages, could complement the effects tradition. Together, these approaches have the potential to clarify the notion of what constitutes responsible reporting of suicide, and to broaden the framework for evaluating media performance.

Using factorial experimental design to evaluate the separation of plastics by froth flotation.

Science.gov (United States)

Salerno, Davide; Jordão, Helga; La Marca, Floriana; Carvalho, M Teresa

2018-03-01

This paper proposes the use of factorial experimental design as a standard experimental method in the application of froth flotation to plastic separation instead of the commonly used OVAT method (manipulation of one variable at a time). Furthermore, as is common practice in minerals flotation, the parameters of the kinetic model were used as process responses rather than the recovery of plastics in the separation products. To explain and illustrate the proposed methodology, a set of 32 experimental tests was performed using mixtures of two polymers with approximately the same density, PVC and PS (with mineral charges), with particle size ranging from 2 to 4 mm. The manipulated variables were frother concentration, air flow rate and pH. A three-level full factorial design was conducted. The models establishing the relationships between the manipulated variables and their interactions with the responses (first order kinetic model parameters) were built. The Corrected Akaike Information Criterion was used to select the best fit model and an analysis of variance (ANOVA) was conducted to identify the statistically significant terms of the model. It was shown that froth flotation can be used to efficiently separate PVC from PS with mineral charges by reducing the floatability of PVC, which largely depends on the action of pH. Within the tested interval, this is the factor that most affects the flotation rate constants. The results obtained show that the pure error may be of the same magnitude as the sum of squares of the errors, suggesting that there is significant variability within the same experimental conditions. Thus, special care is needed when evaluating and generalizing the process. Copyright © 2017 Elsevier Ltd. All rights reserved.

Atmospheric pressure surface sampling/ionization techniques for direct coupling of planar separations with mass spectrometry.

Science.gov (United States)

Pasilis, Sofie P; Van Berkel, Gary J

2010-06-18

Planar separations, which include thin layer chromatography and gel electrophoresis, are in widespread use as important and powerful tools for conducting separations of complex mixtures. To increase the utility of planar separations, new methods are needed that allow in situ characterization of the individual components of the separated mixtures. A large number of atmospheric pressure surface sampling and ionization techniques for use with mass spectrometry have emerged in the past several years, and several have been investigated as a means for mass spectrometric read-out of planar separations. In this article, we review the atmospheric pressure surface sampling and ionization techniques that have been used for the read-out of planar separation media. For each technique, we briefly explain the operational basics and discuss the analyte type for which it is appropriate and some specific applications from the literature. Copyright (c) 2010 Elsevier B.V. All rights reserved.

Dry Separation of Palm Kernel and Palm Shell Using a Novel Five-Stage Winnowing Column System

Directory of Open Access Journals (Sweden)

Rohaya Mohamed Halim

2016-04-01

Full Text Available The conventional separation system for the recovery of palm kernel from its palm shell–kernel mixture using water as process media generates a considerable amount of waste effluent that harms the environment. The aim of this study is to develop a dry separation process for the recovery of palm kernel by using winnowing columns. A commercial system consisting of a series of five winnowing columns was developed and installed at a local palm oil mill. The system parameters, including column height, blower capacity, airflow rate and mesh screen size for shell removal, were studied and optimized to ensure good separation of kernel and shell in the column to enable collection of different sizes of kernel and shell at each column outlet. The performance of the separation process was evaluated in terms of its kernel losses, dirt content and kernel recovery rate. The average kernel losses based on oil palm fresh fruit bunches processed were found to vary from 0.11 to 0.30 wt %, with most of the values obtained being below the targeted limit of 0.30 wt %. The dirt content was in the range 4.56–6.03 wt %, which was mostly below the targeted limit of 5.5 wt %. The kernel recovery rate was in the range 5.69–6.89 wt %, with most of the values achieving the minimum targeted limit of 6.00 wt %. The system operates under completely dry conditions and, therefore, produces zero waste effluent.

Advanced high-temperature thermal energy storage media for industrial applications

Science.gov (United States)

Claar, T. D.; Waibel, R. T.

1982-02-01

An advanced thermal energy storage media concept based on use of carbonate salt/ceramic composite materials is being developed for industrial process and reject heat applications. The composite latent/sensible media concept and its potential advantages over state of the art latent heat systems is described. Media stability requirements, on-going materials development efforts, and planned thermal energy storage (TES) performance evaluation tests are discussed.

Medicine in the popular press: the influence of the media on perceptions of disease.

Directory of Open Access Journals (Sweden)

Meredith E Young

Full Text Available In an age of increasing globalization and discussion of the possibility of global pandemics, increasing rates of reporting of these events may influence public perception of risk. The present studies investigate the impact of high levels of media reporting on the perceptions of disease. Undergraduate psychology and medical students were asked to rate the severity, future prevalence and disease status of both frequently reported diseases (e.g. avian flu and infrequently reported diseases (e.g. yellow fever. Participants considered diseases that occur frequently in the media to be more serious, and have higher disease status than those that infrequently occur in the media, even when the low media frequency conditions were considered objectively 'worse' by a separate group of participants. Estimates of severity also positively correlated with popular print media frequency in both student populations. However, we also see that the concurrent presentation of objective information about the diseases can mitigate this effect. It is clear from these data that the media can bias our perceptions of disease.

Social Media Management Strategies for Organizational Impression Management and their Effect on Public Perception

OpenAIRE

Benthaus, Janek; Risius, Marten; Beck, Roman

2016-01-01

With the growing importance of social media, companies increasingly rely on social media management tools to analyze social media activities and to professionalize their social media engagement. In this study, we evaluate how social media management tools, as part of an overarching social media strategy, help companies to positively influence the public perception among social media users. A mixed methods approach is applied, where we quantitatively analyze 15 million user-generated Twitter m...

[What Can Health Journalism Achieve? A Criterion-Based Evaluation of Print Media Coverage of the HPV Vaccine in Germany, 2006 to 2009].

Science.gov (United States)

Niewald, Ann-Kristin; Oedingen, Carina; Razum, Oliver

2018-03-16

In 2006, the first human papillomavirus (HPV) vaccine was licensed in Europe and in 2007 it was included in the service catalogue of the statutory health insurance. The HPV vaccine led to a controversy in public and print media even before it was licensed. We evaluated the quality of the newspaper coverage of the HPV vaccine during the controversy in Germany. The LexisNexis print media database was scanned for health journalism articles on HPV in 4 high-circulation national newspapers and 4 magazines using pre-defined search terms for the period 2006-2009. Articles were evaluated using established indicators and were graded using a decimal grading scale. 58 articles were identified and evaluated by 2 persons independently. The indicators reflecting health journalism quality received on average a grade of 4.6 out of 6. The major quality categories which give a comprehensive overview of the HPV vaccine scored low in the majority of the articles. Only categories like simplicity of language and structure/order scored high in most of them. Compliance with established quality standards is an important basis of health journalism but seems difficult to achieve in the news coverage on the HPV vaccine. When applying the indicators to the HPV coverage, some avoidable deficiencies was identified from a public health perspective, relating in particular to the evidence base of the vaccination. Monitoring public health media can help to systematically identify information shortfalls or errors and respond with appropriate educational campaigns. © Georg Thieme Verlag KG Stuttgart · New York.

Pengembangan Media Pembelajaran Fisika Menggunakan Lectora Inspire pada Materi Usaha dan Energi SMA

Directory of Open Access Journals (Sweden)

Inggrid Ayu Putri

2016-12-01

Full Text Available Abstract The development of instructional media aims to help students to do independent learning outside the classroom but still under the supervision of teachers. This study uses Research and Development (R & D DDD-E type developed by Ivers and Barron. The steps of DDD-E developing method method consist of Decide, Design, Develop, and Evaluate. Decide is determination of the project objectives, design determines the structure of the media contents to be developed, develop step is developing a media that is already planned. The evaluation exist on DDD steps, so the instructional media can be controlled. The software used in this research is Lectora Inspire. Lectora Inspire used on this research because the software user friendly or easy to use. Keywords: Lectora Inspire, media, work, energy Abstrak Pengembangan media pembelajaran ini bertujuan untuk membantu siswa dalam melakukan pembelajaran mandiri diluar kelas tetapi masih dalam pengawasan guru. Penelitian ini menggunakan metode penelitian dan pengembangan atau Research and Development (R&D tipe DDD-E yang dikembangkan oleh Ivers dan Barron. Langkah – langkah metode pengembangan DDD-E terdiri dari tahap decide, yaitu penentuan tujuan proyek, design, yaitu menentukan struktur isi dari media yang akan dikembangkan, develop adalah tahap untuk mengembangkan media pembelajaran yang sudah direncanakan. Tahap Evaluate adalah tahap evaluasi pengembangan media, dimana langkah ini terdapat pada seluruh tahapan DDD. Perangkat lunak yang digunakan adalah Lectora Inspire. Software ini dipilih karena langkah penggunaan yang user friendly atau mudah digunakan. Kata-kata kunci:Lectora Inspire, media, usaha, energi

Komunikasi Krisis di Era New Media dan Social Media

OpenAIRE

Prastya, Narayana Mahendra

2016-01-01

New media and social media have changed the practice of public relations. One area that changed is crisis communication. Because of these new technologies, crisis can be more complex. The pace of information, the uncertainty, and the rumors, are increasing. Public relations practitioners should include the new media and social media use in their crisis communication plan. Before doing that, public relations practitioners should change their mindset about social media and new media. The first ...

Importance of Strategic Social Media Marketing

Directory of Open Access Journals (Sweden)

Simona VINEREAN

2017-08-01

Full Text Available Technological innovation has grown at an unprecedented rate over the past couple of decades, creating multiple opportunities for marketing in online settings. The proliferation of social media helps customers become more empowered and engaged in their brand interactions, while also providing them with new tools in their search, evaluation, choice and purchases of marketing offerings. Consequently, these developments are influencing marketing practices, both strategically, and tactically. Nowadays, social media has developed in an essential part of marketing strategy for its ability to generate co-created value, to interactively connect brands to consumers, to monitor brand-related discussions and sentiments, to guide consumers in the decision-making process, to instigate customer-to-customer interactions, and transform consumers into brand advocates. The purpose of this paper is to examine the strategic opportunities of social media marketing for organizations. By providing a comprehensive conceptualization and definition of social media marketing, this research outlines its role in advertising, Customer Relationship Management, and e-Word-of-Mouth.

Numerical investigation of vapor–liquid heat and mass transfer in porous media

International Nuclear Information System (INIS)

Xin, Chengyun; Rao, Zhonghao; You, Xinyu; Song, Zhengchang; Han, Dongtai

2014-01-01

Highlights: • The heat and mass transfer behaviors in porous media was investigated. • A modified separate flow model (MSFM) was developed. • The influence of heat flux direction on heat and fluid flow behaviors is great. • The saturation profile is weakly discontinuous on the phase interface. • A countercurrent flow exists in two-phase region. - Abstract: A modified separate flow model (MSFM) is developed to numerically investigate the heat and mass transfer behaviors in porous media in this paper. In the MSFM, the effects of capillarity, liquid phase change, nonisothermal two-phase region and the local thermal non-equilibrium (LTNE) are considered. The vapor and liquid velocities are both converted into intermediate variables in the simulations and conveniently convergent solutions are obtained because a special upwind scheme for the convection or boiling heat transfer source and variable convergence factors are simultaneously employed. Two typical numerical examples with a one-dimension model of porous media are studied that the high heat fluxes are vertical and parallel to the fluid flow direction, respectively. And the results indicated that the influence of heat flux direction on heat and fluid flow behaviors in porous media is great. The nonisothermal phenomenon in the two-phase region is obvious for the former while the LTNE phenomenon is remarkable in the two-phase region for the latter. The results also showed several similar behaviors that the saturation profile is weakly discontinuous on the phase interface and a countercurrent flow exists in two-phase region

Stakeholder acceptance analysis: In-well vapor stripping, in-situ bioremediation, gas membrane separation system (membrane separation)

International Nuclear Information System (INIS)

Peterson, T.

1995-12-01

This document provides stakeholder evaluations on innovative technologies to be used in the remediation of volatile organic compounds from soils and ground water. The technologies evaluated are; in-well vapor stripping, in-situ bioremediation, and gas membrane separation

Separation of nitrogen-krypton by the freeze-dried cellulose acetate membrane

International Nuclear Information System (INIS)

Tanioka, Akihiko; Ishikawa, Kinzo; Kakuta, Akio; Ozaki, Osamu; Oono, Masanori.

1977-01-01

The utility of freeze-dried cellulose acetate membranes, which consist of a thin skin layer supported upon a more porous matrix substructure, was examined for separation of nitrogen-radioactive krypton 85. The high permeable and separative membranes were prepared by fixed freezed-drying of swollen membrane after evaporation of acetone for 4-6 minutes. The permeation rate of nitrogen was 10 -1 -10 -3 (cc/cm 2 .sec.atm). Knudsen flow was predominant, since the permeation rate was inversely proportional to square root of molecular weight of gases. The influence of viscous flow was also observed by slight dependence on the pressure. The mean pore size was calculated by the equation of gas permeation in porous media. There exist fine pores of 30-40A radii in the skin layer. The separation factor (dilution of Kr) was about 0.7 and the separation efficiency was 60%. The collision between different gas molecules (Present-de Bethunes' effect) and the influence of viscous flow depreciates the efficiency. The separation efficiency which was determined by the experiment coincided with the one predicted according to the Present-de Bethunes' equation, supposing that the pore size in skin layer was 10-25A. (auth.)

Media education and media enlightenment as attributes of information society

Directory of Open Access Journals (Sweden)

Лилия Борисовна Белоглазова

2014-12-01

Full Text Available The article deals with the problem of the functioning of media-education and media-enlightenment in modern society. Focuses on the impact of this socio-cultural phenomenon on consciousness of members of the Information Society. Are the main characteristics of media-education and media-education and media-enlightenment. Concludes that media-education and media-enlightenment forms unscientific and anti-scientific thinking and style speech.

Hydrostaticity of Pressure Media in Diamond Anvil Cells

International Nuclear Information System (INIS)

Shu-Jie, You; Liang-Chen, Chen; Chang-Qing, Jin

2009-01-01

Hydrostaticity under high pressure of several materials from solid, fluid to gas, which are widely used as pressure media in modern high-pressure experiments, is investigated in diamond anvil cells. Judging from the R-line widths and R 1 – R 2 peak separation of Ruby fluorescence, the inert argon gas is hydrostatic up to about 30 GPa. The behavior of silicon oil is found to be similar to argon at pressures less than 10 GPa, while the widening of R-lines and increase of R 1 – R 2 peak separation at higher pressure loads indicate a significant degradation of hydrostaticity. Therefore silicon oil is considered as a good pressure medium at pressures less than 10 GPa but poor at higher pressures

Model of separated form factors for unilamellar vesicles

International Nuclear Information System (INIS)

Kiselev, M.A.; Aksenov, V.L.; Lesieur, P.; Lombardo, D.; Kiselev, A.M.

2001-01-01

A new model of separated form factors is proposed for the evaluation of small-angle neutron scattering curves from large unilamellar vesicles. The validity of the model was checked via comparison with the model of a hollow sphere. The model of separated form factors and the hollow sphere model give a reasonable agreement in the evaluation of vesicle parameters

Exploring the uncharted territory of social media: the next frontier of medical education in nephrology.

Science.gov (United States)

Desai, Tejas; Sridharan, Sivakumar; Parada, Xavier; Claure-Del Granado, Rolando; Orantes, Carlos; Madariaga, Hector; Penmatsa, Krishnam Raju; Basu, Gopal; Arce Amare, Fernanda

2018-04-01

Social media is gaining popularity amongst both medical educators and life-long learners. One of the most popular social media platforms used by the medical community is Twitter, which is popular amongst physicians, students and patients, and particularly in medical societies. Major international and regional societies commonly use Twitter to amplify their reach beyond what their live annual meetings can achieve. There has been a unique and notable effort by Nephrology societies to craft a structured social media strategy that results in the broadest reach to the community of nephrology providers. We report on the first three such experiments performed by three separate nephrology organizations.

PENGEMBANGAN MEDIA PEMBELAJARAN KIMIA BERBASIS ANDROID UNTUK MENINGKATKAN MOTIVASI BELAJAR DAN PRESTASI KOGNITIF PESERTA DIDIK SMA

Directory of Open Access Journals (Sweden)

Isma Ramadhani Lubis

2015-10-01

Full Text Available Penelitian ini bertujuan untuk mengembangkan media pembelajaran kimia berbasis android dan mengetahui karakteristik, kualitas dan efektifitas dari media pembelajaran berbasis android. Jenis penelitian ini merupakan penelitian dan pengembangan. Penilaian produk dilakukan oleh ahli media, ahli materi, pendidik kimia, peer reviewers dan uji coba peserta didik. Data penelitian dikumpulkan melalui angket penilaian media, angket motivasi dan tes, kemudian dianalisis dengan Manova. Hasil dari penelitian ini adalah: (1 media pembelajaran kimia berbasis android memiliki karakteristik, yaitu visualisasi menarik, praktis dan fleksibel serta evaluasi soal yang variatif, (2 media pembelajaran kimia berbasis android dinilai layak digunakan dalam pembelajaran, ditinjau dari aspek materi, aspek media dan hasil uji coba peserta didik, serta (3 terdapat peningkatan yang signifikan antara motivasi belajar dan prestasi kognitif peserta didik yang mengikuti pembelajaran menggunakan media pembelajaran kimia berbasis android dengan pembelajaran konvensional. Hasil penelitian ini menunjukkan bahwa media pembelajaran kimia berbasis android layak dan efektif digunakan dalam pembelajaran kimia. Kata Kunci: pengembangan, media pembelajaran kimia berbasis android, motivasi, prestasi kognitif.   DEVELOPING ANDROID-BASED CHEMISTRY INSTRUCTIONAL MEDIA TO IMPROVE THE LEARNING MOTIVATION AND COGNITIVE ACHIEVEMENT OF SMA STUDENTS Abstract The aims of this study are: to develop android-based chemistry instructional media and to reveal the characteristic, the quality, and the effectiveness of android-based chemistry instructional media. This research was research and development. The product assessment was conducted by a media expert, a material expert, chemistry teachers peer reviewers and students. The data collecting technique was done by using media evaluation questionnaires, motivation questionnaire and test, then it was analysed by Manova. The results of the study show that

Media Watchers: A Profile of Press Criticism in Latin America

Directory of Open Access Journals (Sweden)

Rogerio Christofoletti

2006-12-01

Full Text Available Media watchers are recent actors on the Latin American media scene, including the Brazilian one. However, there are examples of monitoring activity spread around the entire continent. Over and above contributing to the improvement of mass media, the observatories help to diff use a culture of critical consumption of information. That contributes to the development of democracy by promoting values such as transparency, freedom and citizenship. This article refl ects, initially, on the conditions of the Brazilian media market. Following that, it evaluates the obstacles to the dissemination of a media criticism culture. At a third moment, the focus is amplifi ed and a profi le of Latin American media watchers is provided, emphasizing characteristics in common and aspects that distinguish them.

Extraction and separation of zinc and cadmium chlorides by TOPO from mixed media

International Nuclear Information System (INIS)

Ben Mousa, S.; Altakrory, A.; Abdel Raouf, M.W.; Alian, A.

1997-01-01

The effect of water-miscible alcohols and acetone on the extraction and separation of Cd and Zn chlorides by TOPO was systematically investigated. The maximum extraction of Zn chloride with 0.1 M TOPO decreases in the order: acetone> methanol> ethanol> 2-propanol> 2-butanol. For alcohols, the sequence of decreasing extractability is thus parallel to the order of their dielectric constants. This can be explained by the increase of HCl extraction by TOPO in the same direction. The presence of additives in the polar phase prevents the formation of a bulky white precipitate encountered during extraction of Zn Cl 2 from pure aqueous solutions. A decrease of Cd chloride extraction was generally noticed in presence of additives; this is more noticeable for the longer chain alcohols. The highest separation factor (E) for Zn Cl 2 and Cd Cl 2 in 0.4 M HCl is obtained from 30% methanol (13.8 compared to about 3.8 in absence of methanol) and from 10-20% acetone where it reaches 30

Recent or imminent separation and intimate violence against women. A conceptual overview and some Canadian examples.

Science.gov (United States)

Sev'er, A

1997-12-01

The link between recent or imminent separation and violence against female partners is discussed. Interviews were conducted among 87 divorced, separated and domestic violence survivors during 1985-88 to study violence perpetrated by men against their female intimate partners. Various bodies of literature are reviewed to establish the fact that separation heightens the risk of violence. The conceptual contributions of social learning and power and control theories are presented as they pertain to intimate violence against women. An expanded version of the power-and-control model is used to underscore the violence proneness of separations, especially when women initiate separations. To illustrate the expanded model, numerous Canadian examples are provided, drawn from interviews with divorced women, survivors of intimate violence, and news media reports. Finally, different strategies to break the cycle of violence are summarized.

Contemporary use of social media by consultant colorectal surgeons.

Science.gov (United States)

McDonald, J J; Bisset, C; Coleman, M G; Speake, D; Brady, R R W

2015-02-01

There is evidence of significant growth in the engagement of UK health-care professionals with 'open' social media platforms, such as Twitter and LinkedIn. Social media communication provides many opportunities and benefits for medical education and interaction with patients and colleagues. This study was undertaken to evaluate the uptake of public social media membership and the characteristics of use of such media channels amongst contemporary UK consultant colorectal surgeons. Colorectal surgeons were identified from the Association of Coloproctology of Great Britain and Ireland (ACPGBI) national registry of colorectal mortality outcomes and were cross-referenced with the General Medical Council (GMC) register. Individuals were identified by manual searching on a number of social media platforms. Matching accounts were then examined to confirm ownership and to evaluate key markers of use. Six-hundred and eighteen individual consultant colorectal surgeons from 142 health authorities were studied (79.5% were ACPGBI members and 90.8% were male). Two-hundred and twenty-nine (37.1%) had LinkedIn profiles (37.7% male surgeons, 29.8% female surgeons; P = 0.2530). LinkedIn membership was significantly higher in ACPGBI members (P social media than reported studies from other health-care professional groups. Further education and appropriate guidance on usage may encourage uptake and confidence, particularly in younger consultants. Colorectal Disease © 2014 The Association of Coloproctology of Great Britain and Ireland.