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Sample records for penn study transforming

  1. Penn State DOE GATE Program

    Energy Technology Data Exchange (ETDEWEB)

    Anstrom, Joel

    2012-08-31

    The Graduate Automotive Technology Education (GATE) Program at The Pennsylvania State University (Penn State) was established in October 1998 pursuant to an award from the U.S. Department of Energy (U.S. DOE). The focus area of the Penn State GATE Program is advanced energy storage systems for electric and hybrid vehicles.

  2. PennDOT : fact book

    Science.gov (United States)

    2008-06-01

    PennDOT was created in 1970 when the former : Department of Highways was merged with transportation related : functions from the Departments of Revenue, : Commerce, Community Affairs and Military Affairs. With : an annual budget of about $5.4 billion...

  3. Use of social media in graduate-level medical humanities education: two pilot studies from Penn State College of Medicine.

    Science.gov (United States)

    George, Daniel R; Dellasega, Cheryl

    2011-01-01

    Social media strategies in education have gained attention for undergraduate students, but there has been relatively little application with graduate populations in medicine. To use and evaluate the integration of new social media tools into the curricula of two graduate-level medical humanities electives offered to 4th-year students at Penn State College of Medicine. Instructors selected five social media tools--Twitter, YouTube, Flickr, blogging and Skype--to promote student learning. At the conclusion of each course, students provided quantitative and qualitative course evaluation. Students gave high favourability ratings to both courses, and expressed that the integration of social media into coursework augmented learning and collaboration. Others identified challenges including: demands on time, concerns about privacy and lack of facility with technology. Integrating social media tools into class activities appeared to offer manifold benefits over traditional classroom methods, including real-time communication outside of the classroom, connecting with medical experts, collaborative opportunities and enhanced creativity. Social media can augment learning opportunities within humanities curriculum in medical schools, and help students acquire tools and skill-sets for problem solving, networking, and collaboration. Command of technologies will be increasingly important to the practice of medicine in the twenty-first century.

  4. 2014 Penn State Bioinorganic Workshop

    Energy Technology Data Exchange (ETDEWEB)

    Golbeck, John [Pennsylvania State Univ., State College, PA (United States)

    2015-10-01

    The 3rd Penn State Bioinorganic Workshop took place in early June 2014 and was combined with the 3rd Penn State Frontiers in Metallobiochemistry Symposium. The workshop was even larger than the 2nd Penn State Bioinorganic Workshop we offered in 2012. It had even more participants (162 rather than 123 in 2012). Like the 2012 workshop, the 2014 workshop had three parts. The first part consisted of 16 90-minute lectures presented by faculty experts on the topic of their expertise (see below). Based on the suggestions from the 2012 workshop, we have recorded all 16 lectures professionally and make them available to the entire bioinorganic community via online streaming. In addition, hard copies of the recordings are available as backup.

  5. The Penn Polarimeters

    Directory of Open Access Journals (Sweden)

    Robert H. Koch

    2012-03-01

    Full Text Available This report describes the inception, development and extensive use over 30 years of elliptical polarimeters at the University of Pennsylvania. The initial Mark I polarimeter design utilized oriented retarder plates and a calcite Foster-Clarke prism as the analyzer. The Mark I polarimeter was used on the Kitt Peak 0.9 m in 1969-70 to accomplish a survey of approximately 70 objects before the device was relocated to the 0.72 m reflector at the Flower and Cook Observatory. Successive generations of automation and improvements included the early-80’s optical redesign to utilize a photoelastic modulated wave plate and an Ithaco lock-in amplifier–the photoelastic modulating polarimeter. The final design in 2000 concluded with a fully remote operable device. The legacy of the polarimetric programs includes studies of close binaries, pulsating hot stars, and luminous late-type variables.

  6. Risk of long-term hot flashes after natural menopause: evidence from the Penn Ovarian Aging Study cohort.

    Science.gov (United States)

    Freeman, Ellen W; Sammel, Mary D; Sanders, Richard J

    2014-09-01

    This study aims to estimate the risk of hot flashes relative to natural menopause and to evaluate the associations of hormone levels, behavioral variables, and demographic variables with the risk of hot flashes after menopause. We performed annual assessment of 255 women who were premenopausal at baseline and reached natural menopause within 16 years of follow-up. The prevalence of moderate/severe hot flashes increased in each premenopausal year, reaching a peak of 46% in the first 2 years after the final menstrual period (FMP). Hot flashes decreased slowly after menopause and did not return to premenopausal levels until 9 years after the FMP. The mean (SD) duration of moderate/severe hot flashes after the FMP was 4.6 (2.9) years (for any hot flashes, 4.9 [3.1] y). One third of women at 10 years or more after menopause continued to experience moderate/severe hot flashes. African-American women (obese and nonobese) and obese white women had significantly greater risks of hot flashes compared with nonobese white women (interaction, P = 0.01). In multivariable analysis, increasing follicle-stimulating hormone levels before the FMP (P menopause; more than one third of women observed for 10 years or more after menopause have moderate/severe hot flashes. Continuation of hot flashes for more than 5 years after menopause underscores the importance of determining individual risks/benefits when selecting hormone or nonhormone therapy for menopausal symptoms.

  7. Penn State advanced light water reactor concept

    International Nuclear Information System (INIS)

    Borkowski, J.A.; Smith, K.A.; Edwards, R.M.; Robinson, G.E.; Schultz, M.A.; Klevans, E.H.

    1987-01-01

    The accident at Three Mile Island heightened concerns over the safety of nuclear power. In response to these concerns, a research group at the Pennsylvania State University (Penn State) undertook the conceptual design of an advanced light water reactor (ALWR) under sponsorship of the US Dept. of Energy (DOE). The design builds on the literally hundreds of years worth of experience with light water reactor technology. The concept is a reconfigured pressurized water reactor (PWR) with the capability of being shut down to a safe condition simply by removing all ac power, both off-site and on-site. Using additional passively activated heat sinks and replacing the pressurizer with a pressurizing pump system, the concept essentially eliminates the concerns of core damage associated with a total station blackout. Evaluation of the Penn State ALWR concept has been conducted using the EPRI Modular Modeling System (MMS). Results show that a superior response to normal operating transients can be achieved in comparison to the response with a conventional PWR pressurizer. The DOE-sponsored Penn State ALWR concept has evolved into a significant reconfiguration of a PWR leading to enhanced safety characteristics. The reconfiguration has touched a number of areas in overall plant design including a shutdown turbine in the secondary system, additional passively activated heat sinks, a unique primary side pressurizing concept, a low pressure cleanup system, reactor building layout, and a low power density core design

  8. Penn State Radar Systems: Implementation and Observations

    Science.gov (United States)

    Urbina, J. V.; Seal, R.; Sorbello, R.; Kuyeng, K.; Dyrud, L. P.

    2014-12-01

    Software Defined Radio/Radar (SDR) platforms have become increasingly popular as researchers, hobbyists, and military seek more efficient and cost-effective means for radar construction and operation. SDR platforms, by definition, utilize a software-based interface for configuration in contrast to traditional, hard-wired platforms. In an effort to provide new and improved radar sensing capabilities, Penn State has been developing advanced instruments and technologies for future radars, with primary objectives of making such instruments more capable, portable, and more cost effective. This paper will describe the design and implementation of two low-cost radar systems and their deployment in ionospheric research at both low and mid-latitudes. One radar has been installed near Penn State campus, University Park, Pennsylvania (77.97°W, 40.70°N), to make continuous meteor observations and mid-latitude plasma irregularities. The second radar is being installed in Huancayo (12.05°S, -75.33°E), Peru, which is capable of detecting E and F region plasma irregularities as well as meteor reflections. In this paper, we examine and compare the diurnal and seasonal variability of specular, non- specular, and head-echoes collected with these two new radar systems and discuss sampling biases of each meteor observation technique. We report our current efforts to validate and calibrate these radar systems with other VHF radars such as Jicamarca and SOUSY. We also present the general characteristics of continuous measurements of E-region and F-region coherent echoes using these modern radar systems and compare them with coherent radar events observed at other geographic mid-latitude radar stations.

  9. Psychometric Properties of the Penn State Worry Questionnaire for Children in a Large Clinical Sample

    Science.gov (United States)

    Pestle, Sarah L.; Chorpita, Bruce F.; Schiffman, Jason

    2008-01-01

    The Penn State Worry Questionnaire for Children (PSWQ-C; Chorpita, Tracey, Brown, Collica, & Barlow, 1997) is a 14-item self-report measure of worry in children and adolescents. Although the PSWQ-C has demonstrated favorable psychometric properties in small clinical and large community samples, this study represents the first psychometric…

  10. After the Prestige: A Postmodern Analysis of Penn and Teller

    Directory of Open Access Journals (Sweden)

    Miller, Liz

    2015-12-01

    Full Text Available By mocking the magic community and revealing the secret behind some of their tricks, Penn and Teller perform a kind of parodic and post-modern “anti-magic.” Penn and Teller display an artful use of rhetoric; in exposing the secrets and shortcomings of conjuring, they are revolutionizing the way people think about both the art of magic and the magic community. Individuals such as Penn and Teller may use parody to subvert the hegemonic interpretations. However, we also know that it is difficult to bring down a system while operating within that system. Thus, this article explores the way Penn and Teller are challenging the metanarrative of the magic community, using several of the duo’s more popular illusions as examples for analysis. Ultimately, this paper should help us gain a better understanding of the way parody can be used to challenge hegemonic conceptions, and the limitations of this type of rhetorical approach.

  11. Study of allotropic transformations in plutonium

    International Nuclear Information System (INIS)

    Spriet, B.

    1966-06-01

    The allotropic transformations in plutonium have been studied by different methods: metallography, dilatometry, thermal analysis, resistivity measurements, examination with a hot stage microscope. In order to study the importance of the purity, purification process such as zone-melting or electro-diffusion have been developed. The characteristics of the α ↔ β transformation can be explained in terms of the influence of internal stresses on the transition temperature and on the transformation kinetics. Some particular characteristics of δ → γ, γ → α, δ ↔ ε, β ↔ γ and δ → α transformations are also given. (author) [fr

  12. Penn gap rule in phase-change memory materials: No clear evidence for resonance bonds

    Directory of Open Access Journals (Sweden)

    K. Shimakawa

    2015-04-01

    Full Text Available Although a proposal of resonance bonds in crystalline phase-change materials based on the GeSbTe system has been provided, we do not find any clear evidence in favor of the proposal. The ellipsometric study demonstrates that a change in the high frequency dielectric constant ε∞ between the amorphous and crystalline phases is only scaled by the average bandgap (the Penn gap rule. Even for a pure antimony film, regarded as a prototype resonance bonding material, ε∞ was found to follow the Penn gap rule. Experimentally, we did not find any evidence of a significant change in the optical transition matrix element during the phase change, which is necessary to support the idea of resonance bonds.

  13. 4th Penn State Bioinorganic Workshop

    Energy Technology Data Exchange (ETDEWEB)

    Krebs, Carsten [Pennsylvania State Univ., University Park, PA (United States)

    2017-08-22

    Pennsylvania State University and our unique laboratory space are well suited for the continuation of such training workshops. The co-principal investigators of this award lead these efforts. After a smaller “trial workshop” in 2010, the Penn State bioinorganic group, led by the co-PIs, offers these workshops biennially. The 2012, 2014, and 2016 workshops provided training to 123, 162, and 153 participants, respectively, by offering (i) a series of lectures given by faculty experts on the given topic, (ii) hands-on training in small groups by experts in the various methods, and (iii) sharing research results of the participants by oral and poster presentations. The centerpiece of the workshops is the hands-on training, in which approximately half of the participants from all ranks (undergraduate students to faculty) served as teachers. In this section, the traditional roles of teachers and students were sometimes reversed to the extent that undergraduate students taught faculty in the students' areas of specialty. We anticipate that these workshops will facilitate research in bioinorganic chemistry and will help establish future collaborations among “workshop alumni” to carry out cutting-edge research in bioinorganic chemistry that will address many important topics relevant to our society.

  14. PENN neurodegenerative disease research - in the spirit of Benjamin Franklin.

    Science.gov (United States)

    Trojanowski, John Q

    2008-01-01

    Benjamin Franklin (1706-1790) was entrepreneur, statesman, supporter of the public good as well as inventor, and his most significant invention was the University of Pennsylvania (PENN). Franklin outlined his plans for a college providing practical and classical instruction to prepare youth for real-world pursuits in his 'Proposals Relating to the Education of Youth in Pensilvania' (1749), and Franklin's spirit of learning to serve society guides PENN to the present day. This is evidenced by the series of articles in this special issue of Neurosignals, describing research conducted by seasoned and newly recruited PENN faculty, addressing consequences of the longevity revolution which defines our epoch at the dawn of this millennium. While aging affects all organ systems, the nervous system is most critical to successful aging. Thus, the articles in this special issue of Neurosignals focus on research at PENN that is designed to prevent or ameliorate aging-related neurodegenerative disorders such as Alzheimer's and Parkinson's disease, amyotrophic lateral sclerosis and frontotemporal dementia. This research could enhance our chances of aging successfully in the continuing longevity revolution, and the essay here provides context and background on this research.

  15. Studying entanglement-assisted entanglement transformation

    International Nuclear Information System (INIS)

    Hsu Liyi

    2004-01-01

    In this paper, we study catalysis of entanglement transformations for n-level pure entangled states. We propose an algorithm of finding the required catalystic entanglement. We introduce several examples by way of demonstration. We evaluate the lower and upper bound of the required inequalities for deciding whether there are m-level appropriate catalyst states for entanglement transformations for two n-level pure entangled states

  16. Undergraduate recruitment strategies at Penn State's School of Forest Resources

    OpenAIRE

    Harper, Betty

    2004-01-01

    Enrollment declines in natural resources programs across the nation since the mid-nineties have raised concerns about the future of natural resources education. Since its peak in 1998, enrollment in Penn State's School of Forest Resources has dropped from a record high of 535 to 315 in fall 2003. At the same time state and federal agencies seeking to maintain and diversify their workforce are facing unprecedented rates of retirement. To address this issue, the School of Forest Resources is co...

  17. Transformation of UML models to CSP : a case study for graph transformation tools

    NARCIS (Netherlands)

    Varró, D.; Asztalos, M.; Bisztray, D.; Boronat, A.; Dang, D.; Geiß, R.; Greenyer, J.; Van Gorp, P.M.E.; Kniemeyer, O.; Narayanan, A.; Rencis, E.; Weinell, E.; Schürr, A.; Nagl, M.; Zündorf, A.

    2008-01-01

    Graph transformation provides an intuitive mechanism for capturing model transformations. In the current paper, we investigate and compare various graph transformation tools using a compact practical model transformation case study carried out as part of the AGTIVE 2007 Tool Contest [22]. The aim of

  18. Case study : a transformer repair facility

    Energy Technology Data Exchange (ETDEWEB)

    Jerade, L. [Jacques Whitford Environment Ltd., Vancouver, BC (Canada)

    2006-07-01

    Polychlorinated biphenyls (PCBs) are synthetic chemical compounds consisting of chlorine, carbon and hydrogen. They are very stable, fire resistant, do not conduct electricity and have low volatility at normal temperatures. They were mainly used as a cooling and insulating fluid for industrial transformers and capacitors. Some of the same properties that made PCBs so widely used, also make them environmentally hazardous, especially their extreme resistance to chemical and biological breakdown by natural processes in the environment. Typical chemicals associated with the presence of PCB oils are chlorobenzene, lead, xylene, and petroleum hydrocarbons. A case study of a transformer repair facility was discussed along with its soil and groundwater remediation. This presentation discussed the delineation program for the site which operated as a repair facility of PCB-containing transformers from 1968 until 1998. The property was bought by Siemens Canada Ltd. in 1998 and was sold in 2004. As part of the purchasing agreement, a Certificate of Compliance from the British Columbia Ministry of Environment was required. Remediation work was therefore needed. The presentation also covered: zones of contamination and contaminants of concern, soil impacts, groundwater impacts, and an evaluation of remediation options. In-situ treatment of soil with hydrogen peroxide and the selected remedial option were discussed. A soil economic analysis was also conducted. Last, challenges, solutions, and conclusions were presented. tabs., figs.

  19. Our Stories Transforming Our Libraries: The York County Library System

    Directory of Open Access Journals (Sweden)

    Mina Edmondson

    2016-11-01

    Full Text Available These narratives chronicle the authors’ journeys to collaborate and discover the transformative impact that stories have on library culture and library staff. This study describes a research collaboration between York County Libraries and Penn State York. In Phase I, we collected stories from library staff as the library system was being challenged to reimage public libraries for the future. The major themes and types of organizational stories identified in the initial narrative project were presented during a county-wide all-staff in-service training. The library District Consultant (first author and the Penn State professor (second author then facilitated a workshop designed to lead staff in their exploration of these topics and generate a written record of their storytelling/discussions. This data became the basis for Phase II of the project and allowed the system to strategically assess its evolving culture and identity.

  20. Tomorrow's engineers through teacher/student programs at Penn State

    International Nuclear Information System (INIS)

    Davidson, C.

    1992-01-01

    Interest in math and science increases when the problems and topics are current and socially relevant. A course that integrates various sciences requires a solid foundation in mathematics and an understanding that real life consists of an interaction of the basic sciences. One topical area that requires the understanding of math and science and affects our society is radiation. Although nuclear issues are prevalent in the news, very few secondary science educators receive much formal training in radiation and nuclear science. A strong push for educational programs on this topic by the U.S. Atomic Energy Commission and state departments of education began in the late 1960s and early 1970s. Through this effort, Pennsylvania State University (Penn State) developed the Nuclear Concepts Institute for secondary science teachers and has continued its involvement with educational programs in nuclear science for teachers and students. From discussions with teachers and students along with formal and informal surveys, the programs have had a positive impact on teachers' interest in learning more about nuclear science and on students' choices to enter nuclear engineering or a related field. The paper discusses the Nuclear Concepts Program; formation of the American Nuclear Science Teachers Association (ANSTA); ANSTA projects; other Penn State educational programs; and impact of education programs

  1. Flow Visualization of Three-Dimensionality Inside the 12 cc Penn State Pulsatile Pediatric Ventricular Assist Device

    OpenAIRE

    Roszelle, Breigh N.; Deutsch, Steven; Manning, Keefe B.

    2010-01-01

    In order to aid the ongoing concern of limited organ availability for pediatric heart transplants, Penn State has continued development of a pulsatile Pediatric Ventricular Assist Device (PVAD). Initial studies of the PVAD observed an increase in thrombus formation due to differences in flow field physics when compared to adult sized devices, which included a higher degree of three-dimensionality. This unique flow field brings into question the use of 2D planar particle image velocimetry (PIV...

  2. Nuclear transformations studies in selenium isotopes

    International Nuclear Information System (INIS)

    Lopez M, B.E.

    1976-01-01

    A compilation is made with regard to the chemical effects produced by nuclear transformations, such as the chemical effects of the beta decay and the chemical effects of the reaction (n,γ) in selenium radioisotopes. As a particular case the chemical effect of the isomeric transition of sup(81m)Se(VI) in potassium selenate crystals marked with radioactive selenium is studied experimentally and the method of adsorption in activated carbon is applied for the analytical separation of the traces of the nuclear isomer tetravalent sup(81b)Se(IV) of one fraction which contains the mixture of the selenium radioisotopes. (author)

  3. Recycling at Penn State's Beaver Stadium. "Recycle on the Go" Success Story

    Science.gov (United States)

    US Environmental Protection Agency, 2009

    2009-01-01

    With a 13-year-old recycling program, The Pennsylvania State University's (Penn State) Beaver Stadium in the past diverted nearly 30 tons of recyclables per year from local landfills. A new initiative to promote recycling in the stadium's tailgating area has helped Penn State more than triple its old recycling record, collecting 112 tons in 2008.…

  4. Transformation

    DEFF Research Database (Denmark)

    Bock, Lars Nicolai

    2011-01-01

    Artiklen diskuterer ordet "transformation" med udgangspunkt i dels hvorledes ordet bruges i arkitektfaglig terminologi og dels med fokus på ordets potentielle indhold og egnethed i samme teminologi.......Artiklen diskuterer ordet "transformation" med udgangspunkt i dels hvorledes ordet bruges i arkitektfaglig terminologi og dels med fokus på ordets potentielle indhold og egnethed i samme teminologi....

  5. TRANSFORMATION

    Energy Technology Data Exchange (ETDEWEB)

    LACKS,S.A.

    2003-10-09

    Transformation, which alters the genetic makeup of an individual, is a concept that intrigues the human imagination. In Streptococcus pneumoniae such transformation was first demonstrated. Perhaps our fascination with genetics derived from our ancestors observing their own progeny, with its retention and assortment of parental traits, but such interest must have been accelerated after the dawn of agriculture. It was in pea plants that Gregor Mendel in the late 1800s examined inherited traits and found them to be determined by physical elements, or genes, passed from parents to progeny. In our day, the material basis of these genetic determinants was revealed to be DNA by the lowly bacteria, in particular, the pneumococcus. For this species, transformation by free DNA is a sexual process that enables cells to sport new combinations of genes and traits. Genetic transformation of the type found in S. pneumoniae occurs naturally in many species of bacteria (70), but, initially only a few other transformable species were found, namely, Haemophilus influenzae, Neisseria meningitides, Neisseria gonorrheae, and Bacillus subtilis (96). Natural transformation, which requires a set of genes evolved for the purpose, contrasts with artificial transformation, which is accomplished by shocking cells either electrically, as in electroporation, or by ionic and temperature shifts. Although such artificial treatments can introduce very small amounts of DNA into virtually any type of cell, the amounts introduced by natural transformation are a million-fold greater, and S. pneumoniae can take up as much as 10% of its cellular DNA content (40).

  6. A Cross-Cultural Study on Transformational Leadership

    Institute of Scientific and Technical Information of China (English)

    XU Wei

    2016-01-01

    This paper examines transformational leadership theory and the relationship between transformational leadership and group performance as well. Transformational leadership asks leaders to understand the needs of followers and motivate follow-ers for their overall development, which brings benefits to a group. It is hoped that this paper can contribute to comparative stud-ies on Transformational leadership in the U.S. and China.

  7. Transformation Craft (T-Craft) Concept Study

    National Research Council Canada - National Science Library

    Marks, Cynthia; Phelps, Chance; Ryan, Justin; Sorensen, Paul

    2007-01-01

    The objective of the Transformation Craft (T-Craft) innovation team was to develop a conceptual craft that addresses the problem of transporting military vehicles at high speed from the Sea Base to troops inland...

  8. Study of an amorphous alloy core transformer

    Science.gov (United States)

    Nafalski, A.; Frost, D. C.

    1994-05-01

    Amorphous core transformers (ACT) have become a technological and commercial reality and there are an estimated 400,000 units installed worldwide [1]. Their applications reflect changes in buying practices, where the efficiency evaluation is an important factor in the purchasing decision for distribution transformers. Use of the total ownership cost (TOC) concept facilities the selection of a transformer on the basis of its performance. This concept is used in this paper to investigate the feasibility of applying a distribution ACT in Western Australian (WA). A 10 kVA ACT, evaluated by the TOC method, was compared with a traditional silicon iron core transformer of the same rating. The cost of amorphous metal (relative to alternative materials), the distribution load profile, and the values of capitalised loss costs are factors which affect the cost effectiveness of ACTs.

  9. FEASIBILITY ANALYSIS FOR INSTALLING A CIRCULATING FLUIDIZED BED BOILER FOR COFIRING MULTIPLE BIOFUELS AND OTHER WASTES WITH COAL AT PENN STATE UNIVERSITY

    International Nuclear Information System (INIS)

    Bruce G. Miller; Sharon Falcone Miller; Robert Cooper; Douglas Donovan; John Gaudlip; Matthew Lapinsky; William Serencsits; Neil Raskin; Dale Lamke; Joseph J. Battista

    2001-01-01

    The Pennsylvania State University, under contract to the U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL) is performing a feasibility analysis on installing a state-of-the-art circulating fluidized bed (CFB) boiler and ceramic filter emission control device at Penn State's University Park campus for cofiring multiple biofuels and other wastes with coal, and developing a test program to evaluate cofiring multiple biofuels and coal-based feedstocks. Penn State currently operates an aging stoker-fired steam plant at its University Park campus and has spent considerable resources over the last ten to fifteen years investigating boiler replacements and performing life extension studies. This effort, in combination with a variety of agricultural and other wastes generated at the agricultural-based university and the surrounding rural community, has led Penn State to assemble a team of fluidized bed and cofiring experts to assess the feasibility of installing a CFB boiler for cofiring biomass and other wastes along with coal-based fuels. The objective of the project is being accomplished using a team that includes personnel from Penn State's Energy Institute and the Office of Physical Plant, Foster Wheeler Energy Services, Inc., and Cofiring Alternatives

  10. TRANSFORMER

    Science.gov (United States)

    Baker, W.R.

    1959-08-25

    Transformers of a type adapted for use with extreme high power vacuum tubes where current requirements may be of the order of 2,000 to 200,000 amperes are described. The transformer casing has the form of a re-entrant section being extended through an opening in one end of the cylinder to form a coaxial terminal arrangement. A toroidal multi-turn primary winding is disposed within the casing in coaxial relationship therein. In a second embodiment, means are provided for forming the casing as a multi-turn secondary. The transformer is characterized by minimized resistance heating, minimized external magnetic flux, and an economical construction.

  11. Study of allotropic transformations in plutonium; Etude des transformations allotropiques du plutonium

    Energy Technology Data Exchange (ETDEWEB)

    Spriet, B [Commissariat a l' Energie Atomique, Fontenay-aux-Roses (France). Centre d' Etudes Nucleaires

    1966-06-01

    The allotropic transformations in plutonium have been studied by different methods: metallography, dilatometry, thermal analysis, resistivity measurements, examination with a hot stage microscope. In order to study the importance of the purity, purification process such as zone-melting or electro-diffusion have been developed. The characteristics of the {alpha} {r_reversible} {beta} transformation can be explained in terms of the influence of internal stresses on the transition temperature and on the transformation kinetics. Some particular characteristics of {delta} {yields} {gamma}, {gamma} {yields} {alpha}, {delta} {r_reversible} {epsilon}, {beta} {r_reversible} {gamma} and {delta} {yields} {alpha} transformations are also given. (author) [French] Les transformations, allotropiques du plutonium ont ete etudiees a l'aide de differentes methodes: metallographie, dilatometrie, analyse thermique, mesure de resistivite, examen au microscope a platine chauffante. Pour preciser l'influence de la purete, des procedes de purification comme la fusion de zone ou l'electrodiffusion ont ete mis au point. Les caracteres de la transformation {alpha} {r_reversible} {beta} s'expliquent par le role des contraintes internes sur la temperature de transition et la cinetique de transformation. Quelques particularites des transformations {delta} {yields} {gamma}, {gamma} {yields} {alpha}, {delta} {r_reversible} {epsilon}, {beta} {r_reversible} {gamma} et {delta} {yields} {alpha} sont egalement presentees. (auteur)

  12. A study for designing YBCO power transformer

    International Nuclear Information System (INIS)

    Hayashi, H.; Okamoto, H.; Harimoto, T.; Imayoshi, T.; Tomioka, A.; Bouno, T.; Konno, M.; Iwakuma, M.

    2007-01-01

    It is highly expected that superconducting transformers, which are characterized by incombustibility, light weight, and compactness, will be used practically for equipment in substations and office buildings sited in urban areas. In recent years, remarkable improvements in the performance of YBaCuO (YBCO) tape wire have been seen. This kind of tape wire has the property that its critical current is large in a highly magnetic field; and, its use is expected to reduce AC loss by applying slit processing on the tape wire, contributing to future cost reductions. In addition, the development of efficient, economical cryogenic units is also expected. The authors have developed a conceptual design for a 66 kV/20 MVA power transformer using YBCO tape wires, or an YBCO power transformer. As a result, we were able to identify the transformer's optimal system structure including coil winding comprised of coils and tape wires; and, we confirmed that the devised transformer can made to be both compact and highly efficient

  13. Pennsylvania: Penn State University Integrated Pest Management Project (A Former EPA CARE Project)

    Science.gov (United States)

    Penn State University (PSU) is the recipient of a Level II CARE cooperative agreement targeting environmental risks in Philadelphia communities. PSU is involved in developing IPM management practices recommendations and policies.

  14. The future of acoustics distance education at Penn State

    Science.gov (United States)

    Brooks, Karen P.; Sparrow, Victor W.; Atchley, Anthony A.

    2005-04-01

    For nearly 20 years Penn State's Graduate Program in Acoustics has offered a graduate distance education program, established in response to Department of Defense needs. Using satellite technology, courses provided synchronous classes incorporating one-way video and two-way audio. Advancements in technology allowed more sophisticated delivery systems to be considered and courses to be offered to employees of industry. Current technology utilizes real time video-streaming and archived lectures to enable individuals anywhere to access course materials. The evolution of technology, expansion of the geographic market and changing needs of the student, among other issues, require a new paradigm. This paradigm must consider issues such as faculty acceptance and questions facing all institutions with regard to blurring the distinction between residence and distance education. Who will be the students? What will be the purpose of education? Will it be to provide professional and/or research degrees? How will the Acoustics Program ensure it remains attractive to all students, while working within the boundaries and constraints of a major research university? This is a look at current practice and issues with an emphasis on those relevant to constructing the Acoustics Programs distance education strategy for the future.

  15. Comparison of Fourier transform and continuous wavelet transform to study echo-planar imaging flow maps

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez G, A.; Bowtell, R.; Mansfield, P. [Area de Procesamiento Digital de Senales e Imagenes Biomedicas. Universidad Autonoma Metropolitana Iztapalapa. Mexico D.F. 09340 Mexico (Mexico)

    1998-12-31

    Velocity maps were studied combining Doyle and Mansfield method (1986) with each of the following transforms: Fourier, window Fourier and wavelet (Mexican hat). Continuous wavelet transform was compared against the two Fourier transform to determine which technique is best suited to study blood maps generated by Half Fourier Echo-Planar Imaging. Coefficient images were calculated and plots of the pixel intensity variation are presented. Finally, contour maps are shown to visualize the behavior of the blood flow in the cardiac chambers for the wavelet technique. (Author)

  16. Comparison of Fourier transform and continuous wavelet transform to study echo-planar imaging flow maps

    International Nuclear Information System (INIS)

    Rodriguez G, A.; Bowtell, R.; Mansfield, P.

    1998-01-01

    Velocity maps were studied combining Doyle and Mansfield method (1986) with each of the following transforms: Fourier, window Fourier and wavelet (Mexican hat). Continuous wavelet transform was compared against the two Fourier transform to determine which technique is best suited to study blood maps generated by Half Fourier Echo-Planar Imaging. Coefficient images were calculated and plots of the pixel intensity variation are presented. Finally, contour maps are shown to visualize the behavior of the blood flow in the cardiac chambers for the wavelet technique. (Author)

  17. Regeneration and Agrobacterium -mediated transformation studies ...

    African Journals Online (AJOL)

    Leaf explants of carnation (Dianthus caryophyllus L. cv. Turbo) were used for the transformation of gene performed by the EHA 105 strain of Agrobacterium tumefaciens harboring the binary vector, pGA482GG. This vector carries the marker genes, neomycin phosphotansferase II (npt II) that determine resistance to ...

  18. SERT Transformation Study. Technical Report No. 70.

    Science.gov (United States)

    Day, Richard; And Others

    This research report deals with the transformations of stimulus sentences that primary grade speakers of Hawaii Creole English (HCE) made when they were asked to repeat sentences said to them in Standard English. The test used was the Kamehameha Early Education Program (KEEP) Standard English Repetition Test (SERT) which was administered to the 21…

  19. Transformational leadership and depressive symptoms: a prospective study.

    Science.gov (United States)

    Munir, Fehmidah; Nielsen, Karina; Carneiro, Isabella Gomes

    2010-01-01

    The aim of this study was to examine the association between transformational leadership and depressive symptoms in employees working within healthcare. 447 employees completed a baseline survey and 274 completed a follow-up survey 18 months later. 188 completed both baseline and follow-up survey. Transformational leadership was measured using the Global Transformational Leadership Scale and depression was measured using with the Major Depression Inventory. Transformational leadership was negatively associated with depressive symptoms at baseline (beta=-0.31, ptransformational leadership style may help toward protecting employees from developing major depression.

  20. Neutron scattering studies of pretransitional phenomena in structural phase transformations

    International Nuclear Information System (INIS)

    Shapiro, S.M.

    1979-03-01

    Materials exhibiting structural phase transformations are well known to possess pretransitional phenomena. Below the transition temperature, T/sub c/, an order parameter appears and the pretransitional effects are associated with the fluctuations of the order parameter. Neutron scattering techniques have proved invaluable in studying the temporal and spatial dependence of these fluctuations. SrTiO 3 is the prototypical example of a structural phase transformation exhibiting features observable in other transformations such as martensitic and order-disorder. The experimental evolution of the understanding of the phase transformation in SrTiO 3 will be reviewed and the features observed will be shown to typify other systems

  1. Preliminary Normative Data on the Penn State University Symbol Cancellation Task With Nonconcussed Adolescents.

    Science.gov (United States)

    Conder, Robert L; Conder, Alanna A; Register-Mihalik, Johna; Conder, Lauren H; Newton, Shannon

    2015-01-01

    Visual concentration impairment after neurologic injury is frequent, making its identification a critical component of neurocognitive concussion assessment. Visual target cancellation tests such as the Penn State University Symbol Cancellation Task (PSUSCT) have been widely used in assessing professional and collegiate athletes. To date, there are no normative studies using the PSUSCT with an adolescent population. Given that 38 million children and adolescents participate in sports and an estimated 5% to 10% are concussed annually, adolescent normative data are critically needed to evaluate concussions in this vulnerable population. The purpose of this study was to provide adolescent normative data on the PSUSCT. Participants included 40 healthy, nonconcussed high school students aged 14 to 19 years old (20 men, 20 women). Participants were administered Forms A and C of the PSUSCT within a 4-day period. Data analysis examined hits, omission errors, and commission errors, with descriptive statistics calculated for the total sample and for subgroups by gender and age. Study 1 provided normative adolescent data on Form A. Study 2 examined practice effects and established reliable change indexes (RCIs) by comparing results on Forms A and C. Neither Study 1 nor Study 2 demonstrated significant group differences for gender or age. In conclusion, this study presents adolescent normative data, apparent practice effects, and RCIs on the PSUSCT. These norms provide data needed to appropriately include the PSUSCT in baseline and postinjury concussion evaluation batteries with adolescent student-athletes. Findings should be replicated with a larger, more heterogeneous sample.

  2. Development of abbreviated eight-item form of the Penn Verbal Reasoning Test.

    Science.gov (United States)

    Bilker, Warren B; Wierzbicki, Michael R; Brensinger, Colleen M; Gur, Raquel E; Gur, Ruben C

    2014-12-01

    The ability to reason with language is a highly valued cognitive capacity that correlates with IQ measures and is sensitive to damage in language areas. The Penn Verbal Reasoning Test (PVRT) is a 29-item computerized test for measuring abstract analogical reasoning abilities using language. The full test can take over half an hour to administer, which limits its applicability in large-scale studies. We previously described a procedure for abbreviating a clinical rating scale and a modified procedure for reducing tests with a large number of items. Here we describe the application of the modified method to reducing the number of items in the PVRT to a parsimonious subset of items that accurately predicts the total score. As in our previous reduction studies, a split sample is used for model fitting and validation, with cross-validation to verify results. We find that an 8-item scale predicts the total 29-item score well, achieving a correlation of .9145 for the reduced form for the model fitting sample and .8952 for the validation sample. The results indicate that a drastically abbreviated version, which cuts administration time by more than 70%, can be safely administered as a predictor of PVRT performance. © The Author(s) 2014.

  3. Development of Abbreviated Eight-Item Form of the Penn Verbal Reasoning Test

    Science.gov (United States)

    Bilker, Warren B.; Wierzbicki, Michael R.; Brensinger, Colleen M.; Gur, Raquel E.; Gur, Ruben C.

    2014-01-01

    The ability to reason with language is a highly valued cognitive capacity that correlates with IQ measures and is sensitive to damage in language areas. The Penn Verbal Reasoning Test (PVRT) is a 29-item computerized test for measuring abstract analogical reasoning abilities using language. The full test can take over half an hour to administer, which limits its applicability in large-scale studies. We previously described a procedure for abbreviating a clinical rating scale and a modified procedure for reducing tests with a large number of items. Here we describe the application of the modified method to reducing the number of items in the PVRT to a parsimonious subset of items that accurately predicts the total score. As in our previous reduction studies, a split sample is used for model fitting and validation, with cross-validation to verify results. We find that an 8-item scale predicts the total 29-item score well, achieving a correlation of .9145 for the reduced form for the model fitting sample and .8952 for the validation sample. The results indicate that a drastically abbreviated version, which cuts administration time by more than 70%, can be safely administered as a predictor of PVRT performance. PMID:24577310

  4. Preventing adolescents’ externalizing and internalizing symptoms: Effects of the Penn Resiliency Program

    Directory of Open Access Journals (Sweden)

    J. J. Cutuli

    2013-11-01

    Full Text Available This study reports secondary outcome analyses from a past study of the Penn Resiliency Program (PRP, a cognitive-behavioral depression prevention program for middle-school aged children. Middle school students (N = 697 were randomly assigned to PRP, PEP (an alternate intervention, or control conditions. Gillham et al., (2007 reported analyses examining PRP’s effects on average and clinical levels of depression symptoms. We examine PRP’s effects on parent-, teacher-, and self-reports of adolescents’ externalizing and broader internalizing (depression/anxiety, somatic complaints, and social withdrawal symptoms over three years of follow-up. Relative to no intervention control, PRP reduced parent-reports of adolescents’ internalizing symptoms beginning at the first assessment after the intervention and persisting for most of the follow-up assessments. PRP also reduced parent-reported conduct problems relative to no-intervention. There was no evidence that the PRP program produced an effect on teacher- or self-report of adolescents’ symptoms. Overall, PRP did not reduce symptoms relative to the alternate intervention, although there is a suggestion of a delayed effect for conduct problems. These findings are discussed with attention to developmental trajectories and the importance of interventions that address common risk factors for diverse forms of negative outcomes.

  5. Method of studying polymorphic transformations in melts of metals

    International Nuclear Information System (INIS)

    Magomedov, A.M.

    1986-01-01

    This paper presents a method used to study the dynamics of the change in the electrical properties of specimens during melting and crystallization and to quite accurately determine the phase transformation temperatures in melts. A block diagram of the unit for measuring the magnetoresistive effect in melts of metals is shown. The authors found that the strength of the magnetic field affects the magnitude of the jumps associated with the anomalies rather than the temperature range of the polymorphic transformations. The method described accurately determines the transformation temperatures for first- and second-order phase transformations; it does not require the use of complicated and expensive equipment. The measurement time is much shorter and the amount of material needed for studies is much smaller than with the use of any other method. The proposed method can be used to study melts of metals and construct phase deagrams of alloys

  6. Penn West Energy Trust CO{sub 2} EOR storage monitoring project

    Energy Technology Data Exchange (ETDEWEB)

    Chalaturnyk, R. [Alberta Univ., Edmonton, AB (Canada)

    2007-07-01

    This presentation described Penn West Energy Trust's carbon dioxide (CO{sub 2}) enhanced oil recovery (EOR) storage monitoring project. The project formed part of a royalty credit program that offered a royalty reduction to energy companies as part of a plan to encourage the development of a CO{sub 2} storage industry in Alberta. The multi-agency project is expected to provide a better understanding of the fate of CO{sub 2} injected into petroleum reservoirs and the role that CO{sub 2} storage will play in reducing greenhouse gas (GHG) emissions. The project is located in a reservoir that had previously been waterflooded. High purity CO{sub 2} is injected through 2 directional wells. Data acquired from the field is used to provide information on baseline geology and hydrogeology, as well as to provide details of baseline leakages. Rock properties are investigated in order identify issues affecting rock strength. Geophysical monitoring is conducted to interpret baseline seismic profile datasets as well as to integrate active and passive survey analyses with geochemical characterization studies and reservoir models. The project is currently in the stage of developing a simulation model based on a comprehensive understanding of CO{sub 2} injection mechanisms. The model will be used to predict CO{sub 2} storage capacity and movement. refs., tabs., figs.

  7. First results from the Penn State Allsky Imager at the Arecibo Observatory

    Science.gov (United States)

    Seker, I.; Mathews, J. D.; Wiig, J.; Gutierrez, P. F.; Friedman, J. S.; Tepley, C. A.

    2007-03-01

    The Penn State Allsky imager (PSASI), a user-owned-public-access (UOPA) instrument installed at Arecibo Observatory (AO: 18.3°N, 66.75°W; altitude: 350 m a.s.l.; L = 1.43 at 300 km; dip angle: 46°; geomagnetic coordinates: 29°N, 5.5°E), is a CCD-based high-resolution allsky optical imager that has been collecting ionospheric airglow data at night since May 2003. The computer controlled six-position filter wheel is equipped with three filters at 630 nm (red), 557.7 nm (green), and 777.4 nm (near-IR), respectively, which correspond to ionosphere-related oxygen emissions. The imager data, taken for more than 3.5 years now, is being used to study various ionospheric processes, such as mapped equatorial spread-F plumes, E-region gravity waves, among other, in conjunction with the AO incoherent scatter radar (ISR), mesosphere and lower thermosphere (MLT) metals lidar, and other instruments, including microbarographs. Data availability and quality as well as specific airglow events on both small/large time/spatial scales are examined, categorized, and made freely available at a data-server website. Our goal here is to briefly review the airglow science enabled by allsky imaging at AO, to describe the instrument and the data-collection methodology, and to present some of the significant results, including airglow events that correspond to ISR results.

  8. 75 FR 38127 - Visteon Systems, LLC North Penn Plant Electronics Products Group Including On-Site Leased Workers...

    Science.gov (United States)

    2010-07-01

    ..., North Penn Plant, Electronics Products Group to be covered by this certification. The intent of the... North Penn Plant Electronics Products Group Including On-Site Leased Workers From Ryder Integrated... Certification Regarding Eligibility To Apply for Worker Adjustment Assistance and Alternative Trade Adjustment...

  9. Transformation induced plasticity in maraging steel: an experimental study

    International Nuclear Information System (INIS)

    Nagayama, K.; Kitajima, Y.; Kigami, S.; Tanaka, K.

    2000-01-01

    The deformation behavior of a maraging TRIP (transformation induced plasticity) steel (MAVAL X12) is studied experimentally under a constant load. The existence of the back stress in the axial direction is directly proved by investigating the dilatation curves. Martensite-start lines are given under tensile, compressive and shear stresses. The evolution of TRIP strain and the maximum TRIP strain are determined. The alloy response during isothermal tensile test is explained in terms of influences both by the composite and transformation. (orig.)

  10. Investigating employee resistance to Lean transformation: UK case study.

    OpenAIRE

    Bruce, J.; Scott, Philip; Roberts, Martyn

    2011-01-01

    Lean is a business process transformation approach that eliminates ‘wastes’ – activities that generate no value for the customer. Lean originated from the production line but is widely implemented in the service sector. This study investigates human and social factors in a Lean transformation in a ‘knowledge worker’ environment. We identify a paradox: a successful Lean programme in the service sector develops staff who are educated and empowered and thus potential opponents to future business...

  11. 75 FR 81331 - Surety Companies Acceptable on Federal Bonds: Termination-Penn Millers Insurance Company

    Science.gov (United States)

    2010-12-27

    ... should be accepted from this company, and bonds that are continuous in nature should not be renewed. The... DEPARTMENT OF THE TREASURY Fiscal Service Surety Companies Acceptable on Federal Bonds: Termination--Penn Millers Insurance Company AGENCY: Financial Management Service, Fiscal Service, Department...

  12. EVIDENCE FOR METAL ATTENUATION IN ACID MINE WATER BY SULFATE REDUCTION, PENN MINE, CALAVERAS COUNTY, CALIFORNIA

    Science.gov (United States)

    The Penn Mine in Calaveras County, California, produced Cu from massive sulfide ores from 1861 to 1953. Mine wastes were removed to a landfill during the late 1990s, improving surface-water quality, but deep mine workings were not remediated and contain metalliferous water with p...

  13. Particle transport methods for LWR dosimetry developed by the Penn State transport theory group

    International Nuclear Information System (INIS)

    Haghighat, A.; Petrovic, B.

    1997-01-01

    This paper reviews advanced particle transport theory methods developed by the Penn State Transport Theory Group (PSTTG) over the past several years. These methods have been developed in response to increasing needs for accuracy of results and for three-dimensional modeling of nuclear systems

  14. Pedagogies of Transformation for High School Study Abroad Programming

    Science.gov (United States)

    Monaghan, Christine E.; Hartmann, Gennifre

    2014-01-01

    This autoethnographic case study examines the ways in which high school students and teachers' behaviors, values, and attitudes were transformed during their participation on a semester-long study abroad program in Central America. The study found that an integrative pedagogical approach in which place-based content was paired with place-based…

  15. Transformational change in healthcare: an examination of four case studies.

    Science.gov (United States)

    Charlesworth, Kate; Jamieson, Maggie; Davey, Rachel; Butler, Colin D

    2016-04-01

    Objectives Healthcare leaders around the world are calling for radical, transformational change of our health and care systems. This will be a difficult and complex task. In this article, we examine case studies in which transformational change has been achieved, and seek to learn from these experiences. Methods We used the case study method to investigate examples of transformational change in healthcare. The case studies were identified from preliminary doctoral research into the transition towards future sustainable health and social care systems. Evidence was collected from multiple sources, key features of each case study were displayed in a matrix and thematic analysis was conducted. The results are presented in narrative form. Results Four case studies were selected: two from the US, one from Australia and one from the UK. The notable features are discussed for each case study. There were many common factors: a well communicated vision, innovative redesign, extensive consultation and engagement with staff and patients, performance management, automated information management and high-quality leadership. Conclusions Although there were some notable differences between the case studies, overall the characteristics of success were similar and collectively provide a blueprint for transformational change in healthcare. What is known about the topic? Healthcare leaders around the world are calling for radical redesign of our systems in order to meet the challenges of modern society. What does this paper add? There are some remarkable examples of transformational change in healthcare. The key factors in success are similar across the case studies. What are the implications for practitioners? Collectively, these key factors can guide future attempts at transformational change in healthcare.

  16. Transformative Learning through Music: Case Studies from Brazil

    Science.gov (United States)

    Qi, Nan; Veblen, Kari K.

    2016-01-01

    In this study we consider meaningful, emancipatory, and affirming music-making in Brazil through the lens of five case studies. Each illustrates aspects of transformative theory through music-making in music education as advanced by Mezirow, Freire, and contemporary Brazilian music educators.

  17. Transforming the Legal Studies Classroom: Clickers and Engagement

    Science.gov (United States)

    Park, Susan; Farag, Denise

    2015-01-01

    In this article the authors address the use of a personal response system ("clickers") in legal studies courses. As legal studies professors, the authors both found that the use of clickers transformed their classrooms--both professors and students are more engaged in the material and in the process of teaching and learning. Building off…

  18. Journey through Transformation: A Case Study of Two Literacy Learners

    Science.gov (United States)

    Duckworth, Vicky; Ade-Ojo, Gordon O.

    2016-01-01

    The study draws on life history, literacy studies, and ethnographic approaches to exploring social practices as a frame to explore the narratives of two UK adult literacy learners who provide a description of their engagement with a transformative curriculum and pedagogical approach. One of the learners reveals his frustration at the lack of…

  19. A comprehensive review of metal-induced cellular transformation studies.

    Science.gov (United States)

    Chen, Qiao Yi; Costa, Max

    2017-09-15

    In vitro transformation assays not only serve practical purposes in screening for potential carcinogenic substances in food, drug, and cosmetic industries, but more importantly, they provide a means of understanding the critical biological processes behind in vivo cancer development. In resemblance to cancer cells in vivo, successfully transformed cells display loss of contact inhibition, gain of anchorage independent growth, resistant to proper cell cycle regulation such as apoptosis, faster proliferation rate, potential for cellular invasion, and ability to form tumors in experimental animals. Cells purposely transformed using metal exposures enable researchers to examine molecular changes, dissect various stages of tumor formation, and ultimately elucidate metal induced cancer mode of action. For practical purposes, this review specifically focuses on studies incorporating As-, Cd-, Cr-, and Ni-induced cell transformation. Through investigating and comparing an extensive list of studies using various methods of metal-induced transformation, this review serves to bridge an information gap and provide a guide for avoiding procedural discrepancies as well as maximizing experimental efficiency. Copyright © 2017 Elsevier Inc. All rights reserved.

  20. Transformational leadership in merging higher education institutions: A case study

    Directory of Open Access Journals (Sweden)

    Crispen Chipunza

    2010-06-01

    Research purpose: The objectives of this study were to establish an understanding of ‘transformational leadership’ and to determine the extent to which it was employed by leaders in an institution of higher education which had incorporated another institution. Motivations for the study: The study provides a starting point, not only for the successful implementation of higher education changes in the future but also the building of leadership commitment and alignment to the proposed changes in the sector as well as the development of institutional leadership teams to take responsibility for any other transformation processes. Research design, approach and method: The population of the study consisted of 350 full-time employees of the institution who had experienced the incorporation process. Two samples – one consisting of six executive management leaders and the other consisting of 153 employees – were used. Both qualitative and quantitative research approaches were employed using the case study method. Main findings: Results showed that transformational principles of idealised influence, intellectual stimulation, and inspirational motivation principles were used more than others and that employees were generally not satisfied with how the incorporation process had taken place. Practical/managerial implications: The results of the study affected the attitude and satisfaction of the employees in this study. Contribution/value-add: The study reveals that leaders in the institution played key roles such as shared vision, team work and the creation of an enabling environment. An important point that has emanated from this study is the evidence that during transformation, a lack of strategic direction and empowering of followers and capacitating them leads to dissatisfaction with the whole process, despite the transformation process being declared a success.

  1. Effect of isochronal annealing on phase transformation studies of ...

    Indian Academy of Sciences (India)

    The mixed phase sample shows higher value of magnetization because of the presence of ferromagnetic γ-Fe2O3 ... 1. Introduction. The study of particle size, phase transformation and micros- ..... The results are in qualitative agreement with ...

  2. Radiological environmental study in area to future anthropogenic transformations

    International Nuclear Information System (INIS)

    Grinnan, T.; MIller, C.R.A.

    1998-01-01

    In this work the existent relationship is identified between the data radioecologics and the geological formations to the north area Holguin with the objective to study the possible incidence that this can have in the rate environmental dose in the event of transformations anthropogenic the place

  3. A Phenomenological Study of an Indonesian Cohort Group's Transformative Learning

    Science.gov (United States)

    Budiraharjo, Markus

    2013-01-01

    This study was set to investigate how a cohort of ten Indonesian teachers experienced transformations in their teaching professionalism upon receiving an assignment of instructional leadership training to other school leaders. These ten teachers, who came from three different Indonesian Jesuit high schools and one archdiocese-based educational…

  4. Study of effect of chromium on titanium dioxide phase transformation ...

    Indian Academy of Sciences (India)

    Administrator

    Study of effect of chromium on titanium dioxide phase transformation by A Bellifa (pp 669–677). Figure S1. Structural ... 4 × 1⋅9486; 2 × 1⋅9799. Octahedral packing. 2 × 2 shared edges. 8 free edges. 3 shared edges. 4 corners. 5 free edges. 2 parallel shared edges. 2 corners. 10 free edges. O. O. Coordination scheme.

  5. A thermal study of an encapsulated electrical transformer

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, A. [Unidad Geotermia, Temixco (Mexico). Instituto de Investigaciones Electricas; Espinosa-Paredes, G. [Universidad Autonoma Metropolitana, Vicentina (Mexico). Dpto. de Ingenieria de Procesos e Hidraulica; Hernandez, I. [Centro de Sistemas de Manufactura, Nuevo Leon (Mexico). Instituto Tecnologico y de Estudios Superiores de Monterrey

    2002-11-01

    A thermal study of a 45 KVA-prototype encapsulated transformer is described. Casting resin systems were used as insulating systems for encapsulated electric transformers. Normal transformer operation is at full load and, thus the conductor and insulating system becomes hot owing to current circulation through the winding. To determine the various temperature distributions throughout the transformer, the thermal properties of the insulating system and boundary conditions must be known, so that hot spots are located via numerical modelling and maximum permissible temperatures are not attained. Results presented herein include thermal conductivity, thermal diffusivity, and specific heat capacity. Thermal conductivity was obtained experimentally by means of the line-source technique at various temperatures, between room temperature and 155{sup o}C which is the thermal limit of class F insulators. The thermal diffusivity was obtained by parameter estimation by fitting an approximate analytical model to the temperature-time data of the thermal conductivity experiment. Specific heat capacity was obtained from the definition of thermal diffusivity and the insulating-system density. In order to improve the electrical performance of the transformer criteria, a numerical simulation of the different dielectric structures was made using computer program. The boundary conditions for the thermal simulation stage were also determined experimentally from temperature test runs. Finally, in order to obtain data for thermal design, a numerical simulation of the high tension winding was carried out. The thermal simulation stage was performed at different current densities in the conductor with and without electrostatic shields to determine the temperature field and maximum attainable temperatures. Maximum transformer temperature were found to be 15-20{sup o}C below its thermal limit and a correlation of maximum temperature as function of circulating current was developed for design

  6. The influence of device position on the flow within the Penn State 12 cc pediatric ventricular assist device.

    Science.gov (United States)

    Schönberger, Markus; Deutsch, Steven; Manning, Keefe B

    2012-01-01

    Ventricular assist devices are a commonly used heart failure therapy for adult patients as bridge-to-transplant or bridge-to-recovery tools. The application of adult ventricular assist devices in pediatric patients has led to increased thrombotic events. Therefore, we have been developing a pediatric ventricular assist device (PVAD), the Penn State 12 cc PVAD. It is designed for patients with a body weight of 5-15 kg and has a stroke volume of 12 cc. Clot formation is the major concern. It is correlated to the coagulability of blood, the blood contacting materials and the fluid dynamics within the system. The intent is for the PVAD to be a long term therapy. Therefore, the system may be oriented in different positions according to the patient's behavior. This study evaluates for the first time the impact of position on the flow patterns within the Penn State 12 cc PVAD, which may help to improve the PVAD design concerning chamber and ports geometries. The fluid dynamics are visualized by particle image velocimetry. The evaluation is based on inlet jet behavior and calculated wall shear rates. Vertical and horizontal model orientations are compared, both with a beat rate of 75, outlet pressures of 90/60 mm Hg and a flow rate of 1.3 l/min. The results show a significant change of the inlet jet behavior and the development of a rotational flow pattern. Vertically, the inlet jet is strong along the wall. It initiates a rotational flow pattern with a wandering axis of rotation. In contrast, the horizontal model orientation results show a weaker inlet jet along the wall with a nearly constant center of rotation location, which can be correlated to a higher risk of thrombotic events. In addition, high speed videography illustrates differences in the diaphragm motion during diastole. Diaphragm opening trajectories measurements determine no significant impact of the density of the blood analog fluids. Hence, the results correlate to human blood.

  7. '½ vol. not relevant': The scrapbook of Winifred Penn-Gaskell

    Directory of Open Access Journals (Sweden)

    Caitlin Doherty

    2014-10-01

    Full Text Available The scrapbook of Winifred Penn-Gaskell – celebrated aerophilatelist and collector of aeronautica –reveals a great deal about its maker and the social and political context of early flight history in Britain. It is argued here that a ‘reading’ of the book as a non-textual object offers a predictive argument for the aesthetic and cultural representation of heavier-than-air craft and pilots in the years immediately prior to the First World War. By viewing each section of the scrapbook as parts of a contingent whole, the early-twentieth century interest in performative masculinity (physical culture and boxing becomes a part of the technological narrative of aviation development. In this paper I question the implications of branding an object such as this ‘irrelevant’ to the broader themes of the Penn-Gaskell collection, and offer some views of my own on how the notion of failure affects museological practices.

  8. A feasibility study on wavelet transform for reactivity coefficient estimation

    International Nuclear Information System (INIS)

    Shimazu, Yoichiro

    2000-01-01

    Recently, a new method using Fourier transform has been introduced in place of the conventional method in order to reduce the time required for the measurement of moderator temperature coefficient in domestic PWRs. The basic concept of these methods is to eliminate noise in the reactivity signal. From this point of view, wavelet analysis is also known as an effective method. In this paper, we tried to apply this method to estimate reactivity coefficients of a nuclear reactor. The basic idea of the reactivity coefficient estimation is to analyze the ratios themselves of the corresponding expansion coefficients of the wavelet transform of the signals of reactivity and the relevant parameter. The concept requires no inverse wavelet transform. Based on numerical simulations, it is found that the method can reasonably estimate reactivity coefficient, for example moderator temperature coefficient, with less length of time sequence data than those required for Fourier transform method. We will continue this study to examine the validity of the estimation procedure for the actual reactor data and further to estimate the other reactivity coefficients. (author)

  9. Pressure-induced transformations in amorphous silicon: A computational study

    Energy Technology Data Exchange (ETDEWEB)

    Garcez, K. M. S., E-mail: kmgarcez@ufma.br [Universidade Federal do Maranhão, 65700-000 Bacabal, Maranhão (Brazil); Antonelli, A., E-mail: aantone@ifi.unicamp.br [Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, UNICAMP, 13083-859 Campinas, São Paulo (Brazil)

    2014-02-14

    We study the transformations between amorphous phases of Si through molecular simulations using the environment dependent interatomic potential (EDIP) for Si. Our results show that upon pressure, the material undergoes a transformation from the low density amorphous (LDA) Si to the high density amorphous (HDA) Si. This transformation can be reversed by decompressing the material. This process, however, exhibits clear hysteresis, suggesting that the transformation LDA ↔ HDA is first-order like. The HDA phase is predominantly five-fold coordinated, whereas the LDA phase is the normal tetrahedrally bonded amorphous Si. The HDA phase at 400 K and 20 GPa was submitted to an isobaric annealing up to 800 K, resulting in a denser amorphous phase, which is structurally distinct from the HDA phase. Our results also show that the atomic volume and structure of this new amorphous phase are identical to those of the glass obtained by an isobaric quenching of the liquid in equilibrium at 2000 K and 20 GPa down to 400 K. The similarities between our results and those for amorphous ices suggest that this new phase is the very high density amorphous Si.

  10. Pressure-induced transformations in amorphous silicon: A computational study

    Science.gov (United States)

    Garcez, K. M. S.; Antonelli, A.

    2014-02-01

    We study the transformations between amorphous phases of Si through molecular simulations using the environment dependent interatomic potential (EDIP) for Si. Our results show that upon pressure, the material undergoes a transformation from the low density amorphous (LDA) Si to the high density amorphous (HDA) Si. This transformation can be reversed by decompressing the material. This process, however, exhibits clear hysteresis, suggesting that the transformation LDA ↔ HDA is first-order like. The HDA phase is predominantly five-fold coordinated, whereas the LDA phase is the normal tetrahedrally bonded amorphous Si. The HDA phase at 400 K and 20 GPa was submitted to an isobaric annealing up to 800 K, resulting in a denser amorphous phase, which is structurally distinct from the HDA phase. Our results also show that the atomic volume and structure of this new amorphous phase are identical to those of the glass obtained by an isobaric quenching of the liquid in equilibrium at 2000 K and 20 GPa down to 400 K. The similarities between our results and those for amorphous ices suggest that this new phase is the very high density amorphous Si.

  11. Transformational leadership and shared governance: an action study.

    Science.gov (United States)

    Bamford-Wade, Anita; Moss, Cheryle

    2010-10-01

    The present study demonstrates the practical relevance of the concepts of transformational leadership as a Director of Nursing working with structure (shared governance) and active processes, informed by action research, to achieve the incremental breakthroughs associated with culture change in nursing. Responding to the context of a decade of health reforms in a New Zealand tertiary hospital, the leadership challenge, as a Director of Nursing, was to find ways of transforming the nursing workforce. How could nursing evolve from a relatively disempowered position within the organization (impact of the reforms) and reshape to achieve effectiveness within the new organizational culture? Interwoven with transformational leadership are action processes progressively moving forward through cycles of reconnaissance, planning, implementation and evaluation. The principles of shared governance 'partnership', 'equity', 'accountability' and 'ownership' underpin and work synchronically with the active processes in advancing the effectiveness of nursing. It is leadership for and in action. This study is descriptive and exploratory overall, and more specifically it uses reflective practice and self-reporting as methods. The outcomes of transformational leadership are evident in a confident, competent and committed nursing workforce which embraces continuous learning and expresses a professional respect for each other. The practical inter-weaving of the concepts of transformational leadership, shared governance and action processes provide a framework for sustainable change processes both at a unit and organizational level. It is the interplay between the three concepts that generates a process of creative innovation, questioning and challenging existing structures to try and reach a new level of excellence through the participation and valuing of nurses and nursing practice. © 2010 The Authors. Journal compilation © 2010 Blackwell Publishing Ltd.

  12. Experimental and Computational Instrumentation for Rotorcraft Noise and Vibration Control Research at the Penn State Rotorcraft Center

    National Research Council Canada - National Science Library

    Smith, Edward

    2001-01-01

    A team of faculty at the Penn State Rotorcraft Center of Excellence has integrated five new facilities into a broad range of research and educational programs focused on rotorcraft noise and vibration control...

  13. DCU 250 Arabic dependency bank: an LFG gold standard resource for the Arabic Penn treebank

    OpenAIRE

    Al-Raheb, Yafa; Akrout, Amine; van Genabith, Josef; Dichy, J.

    2006-01-01

    This paper describes the construction of a dependency bank gold standard for Arabic, DCU 250 Arabic Dependency Bank (DCU 250), based on the Arabic Penn Treebank Corpus (ATB) (Bies and Maamouri, 2003; Maamouri and Bies, 2004) within the theoretical framework of Lexical Functional Grammar (LFG). For parsing and automatically extracting grammatical and lexical resources from treebanks, it is necessary to evaluate against established gold standard resources. Gold standards for various languages h...

  14. Penn State University ground software support for X-ray missions.

    Science.gov (United States)

    Townsley, L. K.; Nousek, J. A.; Corbet, R. H. D.

    1995-03-01

    The X-ray group at Penn State is charged with two software development efforts in support of X-ray satellite missions. As part of the ACIS instrument team for AXAF, the authors are developing part of the ground software to support the instrument's calibration. They are also designing a translation program for Ginga data, to change it from the non-standard FRF format, which closely parallels the original telemetry format, to FITS.

  15. Investigations of groundwater system and simulation of regional groundwater flow for North Penn Area 7 Superfund site, Montgomery County, Pennsylvania

    Science.gov (United States)

    Senior, Lisa A.; Goode, Daniel J.

    2013-01-01

    Groundwater in the vicinity of several industrial facilities in Upper Gwynedd Township and vicinity, Montgomery County, in southeast Pennsylvania has been shown to be contaminated with volatile organic compounds (VOCs), the most common of which is the solvent trichloroethylene (TCE). The 2-square-mile area was placed on the National Priorities List as the North Penn Area 7 Superfund site by the U.S. Environmental Protection Agency (USEPA) in 1989. The U.S. Geological Survey (USGS) conducted geophysical logging, aquifer testing, and water-level monitoring, and measured streamflows in and near North Penn Area 7 from fall 2000 through fall 2006 in a technical assistance study for the USEPA to develop an understanding of the hydrogeologic framework in the area as part of the USEPA Remedial Investigation. In addition, the USGS developed a groundwater-flow computer model based on the hydrogeologic framework to simulate regional groundwater flow and to estimate directions of groundwater flow and pathways of groundwater contaminants. The study area is underlain by Triassic- and Jurassic-age sandstones and shales of the Lockatong Formation and Brunswick Group in the Mesozoic Newark Basin. Regionally, these rocks strike northeast and dip to the northwest. The sequence of rocks form a fractured-sedimentary-rock aquifer that acts as a set of confined to partially confined layers of differing permeabilities. Depth to competent bedrock typically is less than 20 ft below land surface. The aquifer layers are recharged locally by precipitation and discharge locally to streams. The general configuration of the potentiometric surface in the aquifer is similar to topography, except in areas affected by pumping. The headwaters of Wissahickon Creek are nearby, and the stream flows southwest, parallel to strike, to bisect North Penn Area 7. Groundwater is pumped in the vicinity of North Penn Area 7 for industrial use, public supply, and residential supply. Results of field investigations

  16. Studying and simulating transformer configuration to improve power quality

    Directory of Open Access Journals (Sweden)

    Oscar J. Peña Huaringa

    2011-06-01

    Full Text Available This paper presents a study and simulation of transformer configurations to improve power quality; it provides theoretical support based on the expansion of the Fourier series and analysis of symmetrical components. A test system was set up in the laboratory, taking measurements and checking configuration effectiveness in reducing the system’s harmonic content. The configurations were modelled with PSCAD / EMTDC software, using two 6 pulse rectifiers as test loads and two variable speed drives.

  17. Labor Markets in Transformation: Case Studies of Latin America

    OpenAIRE

    Jonasson, Erik

    2009-01-01

    This dissertation contains three independent studies that analyze labor markets in transformation. They focus on two central elements of labor markets in developing countries: non-agricultural employment in the rural economy and informal employment in the urban economy. Rural non-agricultural employment (RNAE) is being increasingly emphasized as a potential pathway out of rural poverty for people who are unable to secure their income in agriculture. By paying particular attention to th...

  18. Leadership in transformation: a longitudinal study in a nursing organization.

    Science.gov (United States)

    Viitala, Riitta

    2014-01-01

    Not only does leadership produce changes, but those changes produce leadership in organisations. The purpose of this paper is to present a theoretical and empirical analysis of the transformation of leadership at two different historical points in a health care organisation. It leans on the perspective of social constructionism, drawing especially from the ideas of Berger and Luckmann (1966). The paper seeks to improve understanding of how leaders themselves construct leadership in relation to organisational change. The empirical material was gathered in a longitudinal case study in a nursing organisation in two different historical and situational points. It consists of written narratives produced by nurse leaders that are analysed by applying discourse analysis. The empirical study revealed that the constructions of leadership were dramatically different at the two different historical and situational points. Leadership showed up as a complex, fragile and changing phenomenon, which fluctuates along with the other organisational changes. The results signal the importance of agency in leadership and the central role of "significant others". The paper questions the traditional categorisation and labelling of leadership as well as the cross-sectional studies in understanding leadership transformation. Its originality relates to the longitudinal perspective on transformation of leadership in the context of a health care organisation.

  19. Elastic neutron diffraction study of transforming and non-transforming single crystal ZrV2

    International Nuclear Information System (INIS)

    Bostock, J.; Wong, M.; MacVicar, M.L.A.; Levinson, M.

    1980-01-01

    The mosaic spread of single crystal ZrV 2 is unusually narrow, approx. 1' from room temperature to 130K. For non-transforming perfect single crystal the mosaic gradually increases to approx. 1.86' at 4.2K; for transforming, twinned single crystal the room temperature mosaic is maintained to 110K, then increases to 2.76' at 94K when the crystal transforms to a mixed cubic (30%) and rhombohedral state (70%). The onset of the electronic instability (approx. 100K) is accompanied by an increase in diffuse scattering background which, for the twinned crystal, peaks at the structural transformation. The electronic instability coupled to the localized lattice stress appears to be the driving mechanism for the transformation

  20. Study of alloy crystallization in systems undergoing peritectic transformations

    International Nuclear Information System (INIS)

    Psarev, V.I.; Kirij, V.G.; Kuznetsov, A.V.; Psareva, I.V.; Ivanov, A.L.

    1982-01-01

    Studies into Ge-Te, In-Te, Al-Mn, Sb-Zn, Sn-Au systems are carried out at melt cooling rates from 50 deg/h to 10 5 deg/h to establish regularities in stable and metastable crystallization of alloys undergoing peritectic transformations. Methods of metallographic, X-ray phase and X-ray diffraction analyses are used. Differentiation in types of peritectic transformations is made through their mechanisms under equilibrium and non-equilibrium crystallization conditions for various alloy systems. It is found out that ability to supercooling even at low or moderate cooling rates for Te-Ge and Te-In system melts can be one of the main indication of the possibility of amorphous alloy formation [ru

  1. Considerations Concerning Matrix Diagram Transformations Associated with Mathematical Model Study of a Three-phase Transformer

    Directory of Open Access Journals (Sweden)

    Mihaela Poienar

    2014-09-01

    Full Text Available The clock hour figure mathematical model of a threephase transformer can be expressed, in the most plain form, through a 3X3 square matrix, called code matrix. The lines position reflect the modification in the high voltage windings terminal and the columns position reflect the modification in the low voltage winding terminal. The main changes on the transformer winding terminal are: the circular permutation of connection between windings; terminal supply reversal; reverse direction for the phase winding wrapping; reversal the beginning with the end for a phase winding; the connection conversion from N in Z between phase winding or inverse. The analytical form of these changes actually affect the configuration of the mathematical model expressed through a transformations diagram proposed and analyzed in two ways: bipolar version and unipolar version (fanwise. In the end of the paper are presented about the practical exploitation of the transformations diagram.

  2. Penn State geoPebble system: Design,Implementation, and Initial Results

    Science.gov (United States)

    Urbina, J. V.; Anandakrishnan, S.; Bilen, S. G.; Fleishman, A.; Burkett, P.

    2014-12-01

    The Penn State geoPebble system is a new network of wirelessly interconnected seismic and GPS sensor nodes with flexible architecture. This network will be used for studies of ice sheets in Antarctica and Greenland, as well as to investigate mountain glaciers. The network will consist of ˜150 geoPebbles that can be deployed in a user-defined spatial geometry. We present our design methodology, which has enabled us to develop these state-of- the art sensors using commercial-off-the-shelf hardware combined with custom-designed hardware and software. Each geoPebble is a self- contained, wirelessly connected sensor for collecting seismic measurements and position information. Key elements of each node encompasses a three-component seismic recorder, which includes an amplifier, filter, and 24- bit analog-to-digital converter that can sample up to 10 kHz. Each unit also includes a microphone channel to record the ground-coupled airwave. The timing for each node is available from GPS measurements and a local precision oscillator that is conditioned by the GPS timing pulses. In addition, we record the carrier-phase measurement of the L1 GPS signal in order to determine location at sub-decimeter accuracy (relative to other geoPebbles within a few kilometers radius). Each geoPebble includes 16 GB of solid-state storage, wireless communications capability to a central supervisory unit, and auxiliary measurements capability (including tilt from accelerometers, absolute orientation from magnetometers and temperature). A novel aspect of the geoPebble is a wireless charging system for the internal battery (using inductive coupling techniques). The geoPebbles include all the sensors (geophones, GPS, microphone), communications (WiFi), and power (battery and charging) internally, so the geoPebble system can operate without any cabling connections (though we do provide an external connector so that different geophones can be used). We report initial field-deployment results and

  3. A study of principle and testing of piezoelectric transformer

    International Nuclear Information System (INIS)

    Liu Weiyue; Wang Yanfang; Huang Yihua; Shi Jun

    2002-01-01

    The operating principle and structure of a kind of piezoelectric transformer which can be used in a particle accelerator are investigated. The properties of piezoelectric transformer are tested through equivalent circuit combined with experiment

  4. From "fixing women" to "institutional transformation": An ADVANCE case study

    Science.gov (United States)

    Yennello, Sherry; Kaunas, Christine

    2015-12-01

    The United States' position in the global economy requires an influx of women into science, technology, engineering, and mathematics (STEM) fields in order to remain competitive. Despite this, the representation of women in STEM continues to be low. The National Science Foundation's ADVANCE Program addresses this issue by funding projects that aim to increase the representation of women in academic STEM fields through transformation of institutional structures that impede women's progress in academic STEM fields. This paper includes a case study of the Texas A&M University ADVANCE Program.

  5. Radiation transformation studies: are they relevant to radiation protection problems?

    International Nuclear Information System (INIS)

    Seymour, C.B.; Mothersill, C.

    1988-01-01

    Because of the difficulties of studying radio-carcinogenesis in humans, several in vitro systems are utilised. These cell transformation systems are reviewed, with particular emphasis on their relevance to human radiological protection problems. Most available systems use rodent fibroblasts. These are discussed in detail. Attention is drawn to certain artefacts which can cause problems with interpretation of such data. The relevance of these systems is questionable because of species differences, particularly concerning life span and because most human tumours are derived from epithelial cells. New epithelial culture systems and three-dimensional tissue culture methods becoming available are discussed in the light of their potential for addressing radiation protection problems. (author)

  6. Study of the maguemite-hematite transformation by magnetic resonance

    International Nuclear Information System (INIS)

    Portella, P.D.

    1979-08-01

    The conversion of γ-Fe 2 O 3 powders to α-Fe 2 O 3 has been studied with the magnetic resonance technique. The residual fraction of γ-Fe 2 O 3 was measured for several times and temperatures of isothermal treatments, in the range 450 0 C - 550 0 C. The transformation can be described by a first order Kinetic equation and the apparent activation energy is about 200 kJ/mol (48 kcal/mol). This value is independent of temperature and particle size. The experimental data suggest that the reaction is growth-controlled and nucleation occurs preferably at the particle surface. (Author) [pt

  7. Migrants and the transformation of local neighbourhoods: A study of the socioeconomic transformation of Lidcombe, Australia

    Directory of Open Access Journals (Sweden)

    Franklin OBENG-ODOOM

    2016-06-01

    Full Text Available A major contributor to negative attitudes towards migrants is that they exert pressure on the facilities of the host communities without making any (substantial contribution to the host economy and society. This negative sentiment is particularly acute in cities, where pressure on amenities is concentrated and more visible. In turn, migrant neighbourhoods are particularly despised. Migration experiences in the Rookwood Cemetery area of Sydney, Australia, widely regarded as the “largest necropolis in the southern hemisphere”, however, challenge this stereotypical view. This migrant neighbourhood is the site of vibrant and diverse migration and migrant (especially Korean activities never before seen in the history of the area, which is now called Lidcombe. Drawing on multiple sources of evidence, including archival research at local libraries, discussion with long-time residents of the neighbourhood and visual ethnography (analysed from the historical-structural perspective in migration studies, this study offers a history of Lidcombe and appraises its twenty-first-century migration experiences. By doing so, it highlights the demographic, social and economic changes to emphasise the contribution of migrants to the regeneration of a “dead city” and also to contest inherited stereotypes of migrants that often lead to racial scapegoating and misrepresentation as “parasites”, “criminals” and a “drain” on the host economy. Overall, this case study suggests that migrants can and often do transform the spaces they occupy in ways that make a positive and lasting contribution to the host economy and society more generally. This is an important lesson for European countries facing the “migrant crisis” to consider, as it also is for politicians around the world seeking to wall out migrants to protect host economies and societies.

  8. Study of low insertion loss and miniaturization wavelet transform and inverse transform processor using SAW devices.

    Science.gov (United States)

    Jiang, Hua; Lu, Wenke; Zhang, Guoan

    2013-07-01

    In this paper, we propose a low insertion loss and miniaturization wavelet transform and inverse transform processor using surface acoustic wave (SAW) devices. The new SAW wavelet transform devices (WTDs) use the structure with two electrode-widths-controlled (EWC) single phase unidirectional transducers (SPUDT-SPUDT). This structure consists of the input withdrawal weighting interdigital transducer (IDT) and the output overlap weighting IDT. Three experimental devices for different scales 2(-1), 2(-2), and 2(-3) are designed and measured. The minimum insertion loss of the three devices reaches 5.49dB, 4.81dB, and 5.38dB respectively which are lower than the early results. Both the electrode width and the number of electrode pairs are reduced, thus making the three devices much smaller than the early devices. Therefore, the method described in this paper is suitable for implementing an arbitrary multi-scale low insertion loss and miniaturization wavelet transform and inverse transform processor using SAW devices. Copyright © 2013 Elsevier B.V. All rights reserved.

  9. Study on linear canonical transformation in a framework of a phase space representation of quantum mechanics

    International Nuclear Information System (INIS)

    Raoelina Andriambololona; Ranaivoson, R.T.R.; Rakotoson, H.; Solofoarisina, W.C.

    2015-04-01

    We present a study on linear canonical transformation in the framework of a phase space representation of quantum mechanics that we have introduced in our previous work. We begin with a brief recall about the so called phase space representation. We give the definition of linear canonical transformation with the transformation law of coordinate and momentum operators. We establish successively the transformation laws of mean values, dispersions, basis state and wave functions.Then we introduce the concept of isodispersion linear canonical transformation.

  10. Study of some parameters of the fibrinogen - fibrin transformation reaction

    International Nuclear Information System (INIS)

    Hollard, D.; Suscillon, M.; Marcille, G.; Rambaud, F.; Baloyan, M.

    1966-01-01

    The authors studied the action of some parameters on the reaction of transformation fibrinogen-fibrin. The five parameters studied are: the concentration of substratum: a certain quantity of enzyme determines an optimum quantity of fibrinogen; the concentration of enzyme: a certain quantity of substratum defines an optimum quantity of enzyme, beyond which the excess of enzyme is unable to act, the substratum being saturated by the enzyme; the concentration of Ca ions: between 0,07 and 0,10 mg of Ca by mg of fibrinogen, the reaction appears with a great speed. Between 0,02 and 0,40 mg of Ca by mg of fibrinogen the fibrin stabilisation is possible, the FSF can act only inside the definite bounds; the ph of the solution: the reaction of the transformation appears with its maximum intensity on physiological ph, the polymerisation is not possible on acid ph; the temperature has an effect which could not really be verified owing to the fact that the technical realisation is difficult. (author) [fr

  11. Modification of the Penn State Reactor to allow transverse and rotational core motion to increase operational versatility

    International Nuclear Information System (INIS)

    Hughes, Daniel E.

    1994-01-01

    At Penn State the Nuclear Engineering students have the opportunity to perform experiments in reactor physics, work with reactor and radiation instrumentation, and operate a nuclear reactor. These activities are done at the Penn State Breazeale Reactor (PSBR), a General Atomics Mark III TRIGA reactor. Unfortunately this activity alone can not fully support the facility. The PSBR is mandated by Penn State to provide a portion of its operating budget by selling services to users outside as well as inside Penn State. In order to increase the marketability of PSBR an upgrade program was started to increase the quality and versatility of operation. The PSBR is the longest operating university reactor in the United States. The first phase of the upgrade program began in 1992. The quality of operation was increased by replacing a 1965 vintage console with a more reliable digital control and monitoring system. The present phase of the upgrade program is to increase the versatility of operation by modifying the reactor to allow transverse and rotational core motion. Adding two more degrees of motion to the reactor core increases the capability of the facility to meet the needs of present and future users. This upgrade is being financed by a grant from the Department of Energy and matching funds from Penn State. (author)

  12. Code Generation by Model Transformation : A Case Study in Transformation Modularity

    NARCIS (Netherlands)

    Hemel, Z.; Kats, L.C.L.; Visser, E.

    2008-01-01

    Preprint of paper published in: Theory and Practice of Model Transformations (ICMT 2008), Lecture Notes in Computer Science 5063; doi:10.1007/978-3-540-69927-9_13 The realization of model-driven software development requires effective techniques for implementing code generators for domain-specific

  13. Validation of the Penn Acoustic Neuroma Quality-of-Life Scale (PANQOL) for Spanish-Speaking Patients.

    Science.gov (United States)

    Medina, Maria Del Mar; Carrillo, Alvaro; Polo, Ruben; Fernandez, Borja; Alonso, Daniel; Vaca, Miguel; Cordero, Adela; Perez, Cecilia; Muriel, Alfonso; Cobeta, Ignacio

    2017-04-01

    Objective To perform translation, cross-cultural adaptation, and validation of the Penn Acoustic Neuroma Quality-of-Life Scale (PANQOL) to the Spanish language. Study Design Prospective study. Setting Tertiary neurotologic referral center. Subjects and Methods PANQOL was translated and translated back, and a pretest trial was performed. The study included 27 individuals diagnosed with vestibular schwannoma. Inclusion criteria were adults with untreated vestibular schwannoma, diagnosed in the past 12 months. Feasibility, internal consistency, test-retest reliability, construct validity, and ceiling and floor effects were assessed for the present study. Results The mean overall score of the PANQOL was 69.21 (0-100 scale, lowest to highest quality of life). Cronbach's α was 0.87. Intraclass correlation coefficient was performed for each item, with an overall score of 0.92. The κ coefficient scores were between moderate and almost perfect in more than 92% of patients. Anxiety and energy domains of the PANQOL were correlated with both physical and mental components of the SF-12. Hearing, balance, and pain domains were correlated with the SF-12 physical component. Facial and general domains were not significantly correlated with any component of the SF-12. Furthermore, the overall score of the PANQOL was correlated with the physical component of the SF-12. Conclusion Feasibility, internal consistency, reliability, and construct validity outcomes in the current study support the validity of the Spanish version of the PANQOL.

  14. [The transformation of Friedrich the Great. A psychoanalytic study].

    Science.gov (United States)

    Lewy, E

    1995-08-01

    The transformation of Frederick the Great. A psychoanalytic study.--As a child and young man, Prince Frederick Hohenzollern, later King Frederick II of Prussia, flatly rejected his father's militaristic, Teutonic code of behaviour with its emphasis on dutiful service, self-abnegation and obedience. Instead he indulged his more "effeminate" leanings, taking an interest in literature, music and the unsoldierly delights provided by the courtly life of the age, and was encouraged in this by both his mother and his sister. This refusal to espouse the manly, paternal principle drove the crown prince into an increasingly vehement conflict with his father, who observed his son's indifference to all things military with growing bitterness, and finally led to a catastrophe in the course of which Frederick's closest friend was executed and he himself only just escaped his father's deadly vengeance. After this crisis, Frederick conformed more and more closely to his father's expectations and instructions and after the latter's death in 1740 developed into a ruler who enhanced Prussia's military and political glory and established a paternalistic principle that not only equalled but indeed exceeded everything that his father had stood for. The author traces in detail Frederick's astounding transformation into the "Frederick the Great" familiar to us from history books, analysing it both psychodynamically and in terms of identity theory. His conclusion is that it was the strength of Frederick's ego--itself the very prerequisite of "greatness"--that saved him from coming to grief over this conflict of identity.

  15. A Discourse of Transformative Islam within Curriculum Transformation at State Institute for Islamic Studies of Purwokerto (IAIN Purwokerto

    Directory of Open Access Journals (Sweden)

    Sabarudin

    2017-06-01

    Full Text Available This research is aimed to trace the thoughts and actions as efforts to achieve vision and mission of state institute for Islamic studies of Purwokerto (IAIN. The study is directed to answer following questions. Firstly, why transformative Islam becomes a discourse on curriculum development. Secondly, how a discourse of transformative Islam implicates in curriculum development at state institute for Islamic studies of Purwokerto (IAIN. Then, the findings show that a discourse of Islam tranformative in curriculum development at state institute for Islamic studies of Purwokerto (IAIN emerges as a result of an incapability of traditional and modern Islam perspective to resolve people’s problem due to lack of critical understanding of the meaning and message of the Qur’an and Hadith. Then, implication of Islamic transformative discourse in curriculum development at state institute for Islamic studies of Purwokerto can be seen in its intra curricular activities, co-curricular, and extra curricular activities. Through intra-curricular activities, transformative Islam is embodied in Islamic building lectures. In co-curricular program, Islam is indigenized through activity of knowledge and practice of worship (nationally abbreviated PPI, while within extra-curricular activities transformative Islamic values come into student activities which are strongly supported by policies of university leaders.

  16. FEASIBILITY ANALYSIS FOR INSTALLING A CIRCULATING FLUIDIZED BED BOILER FOR COFIRING MULTIPLE BIOFUELS AND OTHER WASTES WITH COAL AT PENN STATE UNIVERSITY

    Energy Technology Data Exchange (ETDEWEB)

    Bruce G. Miller; Sharon Falcone Miller; Robert Cooper; John Gaudlip; Matthew Lapinsky; Rhett McLaren; William Serencsits; Neil Raskin; Tom Steitz; Joseph J. Battista

    2003-03-26

    The Pennsylvania State University, utilizing funds furnished by the U.S. Department of Energy's Biomass Power Program, investigated the installation of a state-of-the-art circulating fluidized bed boiler at Penn State's University Park campus for cofiring multiple biofuels and other wastes with coal, and developing a test program to evaluate cofiring biofuels and coal-based feedstocks. The study was performed using a team that included personnel from Penn State's Energy Institute, Office of Physical Plant, and College of Agricultural Sciences; Foster Wheeler Energy Services, Inc.; Foster Wheeler Energy Corporation; Parsons Energy and Chemicals Group, Inc.; and Cofiring Alternatives. The activities included assessing potential feedstocks at the University Park campus and surrounding region with an emphasis on biomass materials, collecting and analyzing potential feedstocks, assessing agglomeration, deposition, and corrosion tendencies, identifying the optimum location for the boiler system through an internal site selection process, performing a three circulating fluidized bed (CFB) boiler design and a 15-year boiler plant transition plan, determining the costs associated with installing the boiler system, developing a preliminary test program, determining the associated costs for the test program, and exploring potential emissions credits when using the biomass CFB boiler.

  17. Spanish adaptation of The Penn State College of Medicine Scale to assess professionalism in medical students.

    Science.gov (United States)

    Bustamante, Eliseo; Sanabria, Álvaro

    2014-01-01

    Professionalism is a subject of interest in medical schools around the world. The use of a questionnaire could be useful to assess professionalism in Colombia. To adapt The Penn State University College of Medicine Professionalism Questionnaire as a culturally valid instrument in the Spanish language. We followed recommendations from the IQOLA project and used forward and back translation with four independent translations, as well as a pilot evaluation and an evaluation of psychometric features with 250 students. We evaluated item-scale correlations and internal consistency with Chronbach's alpha test and conducted a principal components factor analysis. Global Cronbach's alpha was 0.86, the Kaiser-Meyer-Olkin measure of sampling adequacy was 0.83, and Bartlett's test of sphericity had a p >0.00001. We found six factors that explained 93% of the total variance and four new factors emerged in the factor analysis, while eight items had high uniqueness. The Penn State University College of Medicine Scale measures professionalism attitudes in medical students with good reliability. However, the structure of the scale demonstrated differences when used in the Latin American medical student population.

  18. Flow visualization of three-dimensionality inside the 12 cc Penn State pulsatile pediatric ventricular assist device.

    Science.gov (United States)

    Roszelle, Breigh N; Deutsch, Steven; Manning, Keefe B

    2010-02-01

    In order to aid the ongoing concern of limited organ availability for pediatric heart transplants, Penn State has continued development of a pulsatile Pediatric Ventricular Assist Device (PVAD). Initial studies of the PVAD observed an increase in thrombus formation due to differences in flow field physics when compared to adult sized devices, which included a higher degree of three-dimensionality. This unique flow field brings into question the use of 2D planar particle image velocimetry (PIV) as a flow visualization technique, however the small size and high curvature of the PVAD make other tools such as stereoscopic PIV impractical. In order to test the reliability of the 2D results, we perform a pseudo-3D PIV study using planes both parallel and normal to the diaphragm employing a mock circulatory loop containing a viscoelastic fluid that mimics 40% hematocrit blood. We find that while the third component of velocity is extremely helpful to a physical understanding of the flow, particularly of the diastolic jet and the development of a desired rotational pattern, the flow data taken parallel to the diaphragm is sufficient to describe the wall shear rates, a critical aspect to the study of thrombosis and design of such pumps.

  19. Validation of the facial dysfunction domain of the Penn Acoustic Neuroma Quality-of-Life (PANQOL) Scale.

    Science.gov (United States)

    Lodder, Wouter L; Adan, Guleed H; Chean, Chung S; Lesser, Tristram H; Leong, Samuel C

    2017-06-01

    The objective of this study is to evaluate the strength of content validity within the facial dysfunction domain of the Penn Acoustic Neuroma Quality-of-Life (PANQOL) Scale and to compare how it correlates with a facial dysfunction-specific QOL instrument (Facial Clinimetric Evaluation, FaCE). The study design is online questionnaire survey. Members of the British Acoustic Neuroma Association received both PANQOL questionnaires and the FaCE scale. 158 respondents with self-identified facial paralysis or dysfunction had completed PANQOL and FaCE data sets for analysis. The mean composite PANQOL score was 53.5 (range 19.2-93.5), whilst the mean total FaCE score was 50.9 (range 10-95). The total scores of the PANQOL and FaCE correlated moderate (r = 0.48). Strong correlation (r = 0.63) was observed between the PANQOL's facial dysfunction domain and the FaCE total score. Of all the FaCE domains, social function was strongly correlated with the PANQOL facial dysfunction domain (r = 0.66), whilst there was very weak-to-moderate correlation (range 0.01-0.43) to the other FaCE domains. The current study has demonstrated a strong correlation between the facial dysfunction domains of PANQOL with a facial paralysis-specific QOL instrument.

  20. Use of the modular modeling system in the design of the Penn State Advanced Light Water Reactor

    International Nuclear Information System (INIS)

    Smith, K.A.

    1988-12-01

    This study involves the design and subsequent transient analysis of the Penn State Advanced Light Water Reactor (PSU ALWR). The performance of the PSU ALWR is evaluated during small step changes in power and a turbine trip from full power without scram. The Modular Modeling System (MMS), developed by Babcock and Wilcox under a contract from the Electric Power Research Institute (EPRI), is a computer code designed for the simulation of nuclear and fossil power plants. MMS uses preprogrammed modules to represent specific power plant components such as pipes, pumps, steam generators, and a nuclear reactor. These components can then be connected in any manner the user desires providing certain simple interconnection rules are followed. In this study, MMS is used to develop computer models of both the PSU ALWR and a conventional PWR operating at the same power level. These models are then subjected to the transients mentioned above to evaluate the ability of the letdown-injection system to maintain primary system pressure. The transient response of the PSU ALWR and conventional PWR MMS models were compared to each other and whenever possible to actual plant transient data. 14 refs., 29 figs., 5 tabs

  1. Study on transformation of cowpea trypsin inhibitor gene into ...

    African Journals Online (AJOL)

    Cowpea Trypsin Inhibitor (CpTI) gene was transferred into cauliflower by agrobacterium-mediated transformation method, and 14 transgenic cauliflower plants were obtained. Cotyledons and hypocotyls were used as explants. The putative transformants were assayed by PCR and Southern blotting analysis. The results ...

  2. Finite Countermodel Based Verification for Program Transformation (A Case Study

    Directory of Open Access Journals (Sweden)

    Alexei P. Lisitsa

    2015-12-01

    Full Text Available Both automatic program verification and program transformation are based on program analysis. In the past decade a number of approaches using various automatic general-purpose program transformation techniques (partial deduction, specialization, supercompilation for verification of unreachability properties of computing systems were introduced and demonstrated. On the other hand, the semantics based unfold-fold program transformation methods pose themselves diverse kinds of reachability tasks and try to solve them, aiming at improving the semantics tree of the program being transformed. That means some general-purpose verification methods may be used for strengthening program transformation techniques. This paper considers the question how finite countermodels for safety verification method might be used in Turchin's supercompilation method. We extract a number of supercompilation sub-algorithms trying to solve reachability problems and demonstrate use of an external countermodel finder for solving some of the problems.

  3. Thermoanalytical study of polymorphic transformation in Fluconazole drug

    International Nuclear Information System (INIS)

    Desai, S.R.; Shaikh, M.M.; Dharwadkar, S.R.

    2003-01-01

    Polymorphic transformation in Fluconazole (I) drug has been studied employing differential scanning calorimetry (DSC), X-ray diffraction and FT-IR techniques. Fluconazole (I) exhibited the sharp melting point at 138.4 deg. C. Considerable under cooling was, however, observed for the drug during cooling. No indication of freezing of molten Fluconazole (I) was evident in the DSC curve recorded up to a temperature of 25 deg. C in the cooling cycle. Reheating of the sample obtained after cooling, produced the DSC pattern much different compared to that obtained in the first heating and consisted of a sharp exothermic peak beginning at 81 deg. C preceding the twin endothermic peak with an onset temperature of 135.3 deg. C. In addition to these two peaks, a small endothermic peak was also observed around 31 deg. C, which could be attributed to a glass transition with an associated relaxation. The precise glass transition temperature derived from the data collected from six different independent experiments was found to be (31.67±0.13) deg. C. X-ray diffraction pattern of the Fluconazole (I) indicated that the as received sample was crystalline. The molten Fluconazole on cooling, however, produced a glassy amorphous mass. The amorphous product on heating to temperature >81 deg. C transformed to Fluconazole (II) which subsequently changed to Fluconazole (I) prior to melting. The split endothermic peak beginning at 135.3 deg. C recorded for the solidified Fluconazole sample is consistent with the observations made by X-ray diffraction. The observations made by employing DSC and X-ray diffraction were corroborated by FT-IR data on the samples isolated at different stages in the experiments

  4. Thermoanalytical study of polymorphic transformation in Fluconazole drug

    Energy Technology Data Exchange (ETDEWEB)

    Desai, S.R.; Shaikh, M.M.; Dharwadkar, S.R

    2003-03-24

    Polymorphic transformation in Fluconazole (I) drug has been studied employing differential scanning calorimetry (DSC), X-ray diffraction and FT-IR techniques. Fluconazole (I) exhibited the sharp melting point at 138.4 deg. C. Considerable under cooling was, however, observed for the drug during cooling. No indication of freezing of molten Fluconazole (I) was evident in the DSC curve recorded up to a temperature of 25 deg. C in the cooling cycle. Reheating of the sample obtained after cooling, produced the DSC pattern much different compared to that obtained in the first heating and consisted of a sharp exothermic peak beginning at 81 deg. C preceding the twin endothermic peak with an onset temperature of 135.3 deg. C. In addition to these two peaks, a small endothermic peak was also observed around 31 deg. C, which could be attributed to a glass transition with an associated relaxation. The precise glass transition temperature derived from the data collected from six different independent experiments was found to be (31.67{+-}0.13) deg. C. X-ray diffraction pattern of the Fluconazole (I) indicated that the as received sample was crystalline. The molten Fluconazole on cooling, however, produced a glassy amorphous mass. The amorphous product on heating to temperature >81 deg. C transformed to Fluconazole (II) which subsequently changed to Fluconazole (I) prior to melting. The split endothermic peak beginning at 135.3 deg. C recorded for the solidified Fluconazole sample is consistent with the observations made by X-ray diffraction. The observations made by employing DSC and X-ray diffraction were corroborated by FT-IR data on the samples isolated at different stages in the experiments.

  5. Validation of the Penn Inventory of Scrupulosity (PIOS) in scrupulous and nonscrupulous patients: Revision of factor structure and psychometrics.

    Science.gov (United States)

    Huppert, Jonathan D; Fradkin, Isaac

    2016-06-01

    Scrupulosity, or obsessive-compulsive symptoms related to religiosity or religion, is a common presentation of obsessive compulsive disorder (OCD), and it is important to elucidate its phenomenology and measurement. Today, the most widespread questionnaire for the assessment of scrupulosity is the Penn Inventory of Scrupulosity (PIOS). The current study examines the psychometric properties of the PIOS in outpatient, treatment-seeking patients. Results of a confirmatory factor analysis suggested an unsatisfactory fit for previously suggested factor structures. A follow-up exploratory factor analysis suggested that a bifactor model was the most suitable solution. In addition, the scores of the PIOS and its revised subscales were found to have moderate-good concurrent validity; however, its scores discriminated poorly between patients with scrupulous obsessions and patients with OCD and other repugnant obsessions. Group differences and receiver operating characteristics (ROC) analyses both indicated that the PIOS is more suitable in discriminating scrupulous obsessions in Christian patients but not in other religious groups (i.e., Jews, nonreligious patients). Additional analyses revealed that the co-occurrence of scrupulous and other repugnant obsessions is also moderated by religious affiliation. These results raise questions in terms of grouping scrupulosity with other repugnant obsessions and suggest for the need of culturally sensitive instruments of scrupulosity. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  6. Efficient transformer study: Analysis of manufacture and utility data

    Energy Technology Data Exchange (ETDEWEB)

    Burkes, Klaehn [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Cordaro, Joe [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); McIntosh, John [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); McConnell, Benjamin [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Hammerstrom, Donald [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

    2017-05-16

    Distribution transformers convert power from the distribution system voltage to the end-customer voltage, which consists of residences, businesses, distributed generation, campus systems, and manufacturing facilities. Amorphous metal distribution transformers (AMDT) are also more expensive and heavier than conventional silicon steel distribution transformers. This and the difficulty to measure the benefit from energy efficiency and low awareness of the technology have hindered the adoption of AMDT. This report presents the cost savings for installing AMDT and the amount of energy saved based on the improved efficiency.

  7. Transform: assessing the potential of e-health to transform patient recruitment and follow-up in primary care studies.

    NARCIS (Netherlands)

    Mastellos, N.; Andreasson, A.; Curcin, V.; Verheij, R.; Hek, K.; Car, J.; Delaney, B.

    2014-01-01

    Background: Opportunistic recruitment to clinical studies is a particularly demanding process for GPs, patients and researchers. To date, this is performed manually using paper-based administration methods. The EU FP7-funded TRANSFoRm project team is currently finalising the tools to enable

  8. A Study on quality improvement and application technology in pad-mounted transformers

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Soon Tae; Mun, Kyung Hwa; Jung, Dong Won; Kim, Sang Jun; Lee, Nam Woo; Kang, Nae Kuk; Kim, Dong Mung [Korea Electric Power Corp. (KEPCO), Taejon (Korea, Republic of). Research Center; Kim, Kwang Ha; Kang, Young Sik; Lee, Woo Young; Lyu, Hee Suk; Sun, Jong Ho; Lyu, Hyung Ki; Kim, Yik Soo; Park, Sung Jae; Kim, Won Ho [Korea Electrotechnology Research Inst., Changwon (Korea, Republic of)

    1995-12-31

    In order to increase the reliability of pad-mounted transformers, the authors investigated operating condition of pad-mounted transformers and understood their failure mechanisms. The objective of their study was to improve quality and operating condition and install switches to be able to check and maintain transformers and optimise protection devices and increase cooling effect in pad-mounted transformers (author). 65 refs., 130 figs.

  9. Aragonite→calcite transformation studied by EPR of Mn 2+ ions

    Science.gov (United States)

    Lech, J.; Śl|zak, A.

    1989-05-01

    The irreversible transformation aragonite→calcite has been studied both at different fixed heating rates (5, 10, 15 and 20 K/min) and at different fixed temperatures. Apparent progression rates of the transformation were observed above 685 K. At 730 K the transformation became sudden and violent. Time developments of the transformation at fixed temperatures have been discussed in terms of Avrami-Lichti's approach to transitions involving nucleation processes.

  10. Studies on Agrobacterium-mediated genetic transformation of ...

    African Journals Online (AJOL)

    SERVER

    2008-03-04

    Mar 4, 2008 ... Sweet potato (Ipomoea batatas) is the sixth most impor- tant crop in the world after ... mediated transformation system does not involve sophis- .... (w/v) agarose gel. .... This work was supported by National Natural Science.

  11. Fourier Transform Infrared and Resonance Raman Spectroscopic Studies of Bacteriorhodopsin.

    Science.gov (United States)

    Earnest, Thomas Nixon

    Fourier transform infrared and resonance Raman spectroscopy were used to investigate the structure and function of the light-activated, transmembrane proton pump, bacteriorhodopsin, from the purple membrane of Halobacterium halobium. Bacteriorhodopsin (bR) is a 27,000 dalton integral membrane protein consisting of 248 amino acids with a retinylidene chromophore. Absorption of a photon leads to the translocation of one or two protons from the inside of the cell to the outside. Resonance Raman spectroscopy allows for the study of the configuration of retinal in bR and its photointermediates by the selective enhancement of vibrational modes of the chromophore. This technique was used to determine that the chromophore is attached to lysine-216 in both the bR _{570} and the M _{412} intermediates. In bR with tyrosine-64 selectively nitrated or aminated, the chromophore appears to have the same configuration in that bR _{570} (all- trans) and M _{412} (13- cis) states as it does in unmodified bR. Polarized Fourier transform infrared spectroscopy (FTIR) permits the study of the direction of transition dipole moments arising from molecular vibrations of the protein and the retinal chromophore. The orientation of alpha helical and beta sheet components was determined for bR with the average helical tilt found to lie mostly parallel to the membrane normal. The beta sheet structures also exhibit an IR linear dichroism for the amide I and amide II bands which suggest that the peptide backbone is mostly perpendicular to the membrane plane although it is difficult to determine whether the bands originate from sheet or turn components. The orientation of secondary structure components of the C-1 (residues 72-248) and C-2 (residues 1-71) fragments were also investigated to determine the structure of these putative membrane protein folding intermediates. Polarized, low temperature FTIR -difference spectroscopy was then used to investigate the structure of bR as it undergoes

  12. Comparison study on transformation of iron oxyhydroxides: Based on theoretical and experimental data

    International Nuclear Information System (INIS)

    Lu Bin; Guo Hui; Li Ping; Liu Hui; Wei Yu; Hou Denglu

    2011-01-01

    We have investigated the catalytic transformation of ferrihydrite, feroxyhyte, and lepidocrocite in the presence of Fe(II). In this paper, the transformation from akaganeite and goethite to hematite in the presence of trace Fe(II) was studied in detail. The result indicates that trace Fe(II) can accelerate the transformation of akaganeite and goethite. Compared with the transformation of other iron oxyhydroxides (e.g., ferrihydrite, feroxyhyte, lepidocrocite, and akaganeite), a complete transformation from goethite to hematite was not observed in the presence of Fe(II). On the basis of our earlier and present experimental results, the transformation of various iron oxyhydroxides was compared based on their thermodynamic stability, crystalline structure, transformation mechanism, and transformation time. - Graphical abstract: The transformation of various iron oxyhydroxides in the presence of trace Fe(II) was compared based on experimental results, thermodynamic stability, crystalline structure, and transformation mechanism. Highlights: → Fe(II) can accelerate the transformation from akaganeite to hematite. → Small particles of goethite can transform to hematite in the presence of Fe(II). → Some hematite particles were found to be embedded within the crystal of goethite. → The relationship between structure and transformation mechanism was revealed.

  13. Application of Differential Scanning Calorimetry (DSC in study of phase transformations in ductile iron

    Directory of Open Access Journals (Sweden)

    R. Przeliorz

    2010-04-01

    Full Text Available The effect of heating rate on phase transformations to austenite range in ductile iron of the EN-GJS-450-10 grade was investigated. For studies of phase transformations, the technique of differential scanning calorimetry (DSC was used. Microstructure was examined by optical microscopy. The calorimetric examinations have proved that on heating three transformations occur in this grade of ductile iron, viz. magnetic transformation at the Curie temperature, pearlite→austenite transformation and ferrite→austenite transformation. An increase in the heating rate shifts the pearlite→austenite and ferrite→austenite transformations to higher temperature range. At the heating rate of 5 and 15°C/min, local extrema have been observed to occur: for pearlite→austenite transformation at 784°C and 795°C, respectively, and for ferrite→austenite transformation at 805°C and 821°C, respectively. The Curie temperature of magnetic transformation was extrapolated to a value of 740°C. Each transformation is related with a specific thermal effect. The highest value of enthalpy is accompanying the ferrite→austenite transformation, the lowest occurs in the case of pearlite→austenite transformation.

  14. The comparison study among several data transformations in autoregressive modeling

    Science.gov (United States)

    Setiyowati, Susi; Waluyo, Ramdhani Try

    2015-12-01

    In finance, the adjusted close of stocks are used to observe the performance of a company. The extreme prices, which may increase or decrease drastically, are often become particular concerned since it can impact to bankruptcy. As preventing action, the investors have to observe the future (forecasting) stock prices comprehensively. For that purpose, time series analysis could be one of statistical methods that can be implemented, for both stationary and non-stationary processes. Since the variability process of stocks prices tend to large and also most of time the extreme values are always exist, then it is necessary to do data transformation so that the time series models, i.e. autoregressive model, could be applied appropriately. One of popular data transformation in finance is return model, in addition to ratio of logarithm and some others Tukey ladder transformation. In this paper these transformations are applied to AR stationary models and non-stationary ARCH and GARCH models through some simulations with varying parameters. As results, this work present the suggestion table that shows transformations behavior for some condition of parameters and models. It is confirmed that the better transformation is obtained, depends on type of data distributions. In other hands, the parameter conditions term give significant influence either.

  15. Education programs at Penn State Breazale Reactor - a focus on waste

    International Nuclear Information System (INIS)

    Davison, C.

    1993-01-01

    Discussions about energy policy and issues focus on environmental impact of energy production and the generation of waste. When dealing specifically with nuclear energy, one of the major concerns is the solution to the open-quotes waste problem.close quotes Since there is no repository in the US for the isolation of high-level radioactive waste generated by nuclear power plants, questions and criticism arise concerning this issue. Education is the key to providing information about this issue to help develop a more technologically literate society. Several educational programs and approaches will be discussed including: Penn State University's programs for students and teachers. The US DOE curriculum materials - open-quotes Science, Society and America's Nuclear Waste,close quotes the open-quotes International Workshop on Education in the field of Radioactive Waste Management - at the crossroad of energy, science and environment,close quotes and the American Nuclear Science Teacher's Association

  16. Displaying a Poster, Unifying a Campus: Undergraduate Research Day at Penn State Wilkes-Barre

    Directory of Open Access Journals (Sweden)

    Jennie Levine Knies

    2015-11-01

    Full Text Available This article describes the first official Undergraduate Research Day at Penn State Wilkes-Barre, a small campus with approximately 550 undergraduate students and 8 four-year degree programs. In 2015, an informal planning committee, consisting of two librarians and two faculty members, embarked on a project to turn what had been an informal course assignment into a campus-wide research event.  By remaining flexible, engaged, and open to collaboration, the committee made Undergraduate Research Day in April 2015 a success, and plans are underway to hold this event in subsequent years.  The event energized and motivated students, faculty, and staff on campus and paved the way toward a unified organizational identity on campus.

  17. Study of nuclear statics and dynamics using the Wigner transform

    International Nuclear Information System (INIS)

    Shlomo, S.

    1983-01-01

    The Wigner phase-space distribution function, given as the shifted Fourier transform of the density matrix, provides a framework for an exact reformulation of non-relativistic quantum mechanics in terms of classical concepts. The Wigner distribution function (WDF), f(r-vector, p-vector), is considered as a quantum mechanical generalization of the classical phase space distribution function. While basic observables, such as matter density and momentum density, are given by the same integrals over f(r-vector, p-vector) as in classical physics, f(r-vector, p-vector) differs from its classical analog by the fact that it can assume negative values in some regions. However, it is known that the WDF is a useful and convenient tool for the study of the static and the dynamical aspects of many-body quantum systems, and the equation of motion for f(r-vector, p-vector) serves as a starting point for semi-classical approximations. The aim of this talk is to present and discuss some recent results for static and dynamic properties of nuclei obtained by exact evaluation of the WDF

  18. Fourier transform nuclear magnetic resonance studies of 199Hg

    International Nuclear Information System (INIS)

    Krueger, H.; Lutz, O.; Nolle, A.; Schwenk, A.

    1975-01-01

    199 Hg Fourier Transform NMR studies of various solutions of diverse mercury salts in H 2 O and D 2 O or in the appropriate protonated and deuterated acids are reported for both Hg 2 ++ and Hg ++ . In the different solutions investigated the 199 Hg line positions depend on the concentration of the solution, on the solvents and their isotopic composition and on the temperature of the sample. A ratio of the Larmor frequency of 199 Hg and of 2 H in a Hg(NO 3 ) 2 solution in dilute DNO 3 is given. Using this ratio and the measured chemical shifts, a ratio of the Larmor frequencies of 199 Hg for infinite dilution relative to 2 H in pure D 2 O is given. From this a g 1 -factor for 199 Hg is derived and compared with the g 1 -factor of an optical pumping experiment. The resulting shielding constant is sigma (hydrated 199 Hg ++ versus 199 Hg atom) = -24.32(5) x 10 -4 . This yields an atomic reference scale for all measured NMR line shifts of mercury. (orig.) [de

  19. Modelling and study on the output flow characteristics of expansion energy used hydropneumatic transformer

    Energy Technology Data Exchange (ETDEWEB)

    Shi, Yan; Wu, Tiecheng; Cai, Maolin; Liu, Chong [Beihang University, Beijing (China)

    2016-03-15

    Hydropneumatic transformer (short for HP transformer) is used to pump pressurized hydraulic oil. Whereas, due to its insufficient usage of energy and low efficiency, a new kind of HP transformer: EEUHP transformer (Expansion energy used hydropneumatic transformer) was proposed. To illustrate the characteristics of the EEUHP transformer, a mathematical model was built. To verify the mathematical model, an experimental prototype was setup and studied. Through simulation and experimental study on the EEUHP transformer, the influence of five key parameters on the output flow of the EEUHP transformer were obtained, and some conclusions can be drawn. Firstly, the mathematical model was proved to be valid. Furthermore, the EEUHP transformer costs fewer of compressed air than the normal HP transformer when the output flow of the two kinds of transformers are almost same. Moreover, with an increase in the output pressure, the output flow decreases sharply. Finally, with an increase in the effective area of hydraulic output port, the output flow increases distinctly. This research can be referred to in the performance and design optimization of the EEUHP transformers.

  20. A study on the diagnosis for power transformer by ultrasonic wave detection(2)

    International Nuclear Information System (INIS)

    Lee, Sang Guk; Gil Doo Song

    2003-01-01

    The objectives of this study is to develop a device which could diagnose periodically the degradation of power transformer using ultrasonic signal through ultrasonic transducer attached surface of power transformer. And also it makes possible to reduce power failure time due to the power transformer fault and makes power system more reliable. Ultrasonic diagnostic device for power transformer was developed through this study. The developed device will contributed to early detection of fault and its location in the power transformer while it is operated, and also to extension of transformer life cycle, localization of this device will be reduced it's cost down compared with off shore. This device consisted of a new diagnostic algorithm is well suited for the power transformer which could found out some fault during the operation of on line monitoring system. This system could be extended to the general industrial plant utilizing the accumulated diagnostic technique.

  1. A study on the diagnosis for power transformer by Ultrasonic wave detection (2)

    International Nuclear Information System (INIS)

    Lee, Sang Guk; Gil, Doo Song

    2003-01-01

    The objectives of this study is to develop a device which could diagnosis periodically the degradation of power transformer using ultrasonic signal through ultrasonic transducer attached surface of power transformer. And also it makes possible to reduce power failure time due to the power transformer fault and makes power system more reliable. Ultrasonic diagnostic device for power transformer was developed through this study. The developed device will contributed to early detection of fault and its location in the power transformer while it is operated, and also to extension of transformer life cycle, localization of this device will be reduced it's cost down compared with off shore. This device consisted of a new diagnostic algorithm is well suited for the power transformer which could found out some fault during the operation of on line monitoring system. This system could be extended to the general industrial plant utilizing the accumulated diagnostic technique.

  2. Origen of Alexandria: The study of the Scriptures as transformation ...

    African Journals Online (AJOL)

    Test

    2011-06-07

    Jun 7, 2011 ... ... of the Scriptures as transformation of the readers into images of the God of love ... He continues: 'it is clear that the authoritative text being explicated was not ..... to John as John's mother.19 Origen first explains this kind of identity by ... the Logos himself approaches the home of the readers and knocks in ...

  3. The Transformation of Music Education: A South African Case Study

    Science.gov (United States)

    de Villiers, Alethea

    2015-01-01

    In this paper I reflect on transformation in South African education policy, post-1994. The new curriculum for schools was underpinned by the democratic values of the constitution and was a time of renewal for music education. However, over time as the original curriculum documents were revised, the focus of promoting indigenous traditions was…

  4. A Study of Color Transformation on Website Images for the Color Blind

    OpenAIRE

    Siew-Li Ching; Maziani Sabudin

    2010-01-01

    In this paper, we study on color transformation method on website images for the color blind. The most common category of color blindness is red-green color blindness which is viewed as beige color. By transforming the colors of the images, the color blind can improve their color visibility. They can have a better view when browsing through the websites. To transform colors on the website images, we study on two algorithms which are the conversion techniques from RGB colo...

  5. Digital transformation and its effects on the competency framework: a case study of digital banking

    OpenAIRE

    Kreitstshtein, Anton

    2017-01-01

    This thesis is a qualitative study on how the digital transformation affects the firm’s competency framework in the banking sector. The aim of the study is to establish what are the differences between the firms of various degrees of digitalisation, and to use that insight to create a competency framework for a digitally transforming firm. The theoretical framework provides background to the notion of digital transformation and describes the specificities of the digital aspects of the ba...

  6. Statistical Study of Transformation Changes in the Ukrainian Economy

    Directory of Open Access Journals (Sweden)

    O. V.

    2017-12-01

    Full Text Available The article deals with the economic diagnostics of some important macroeconomic indicators of Ukraine that will reveal the nature and speed of the economic transformation. During the period of 2003–2007, the Ukrainian economy grew at an impressive pace. However, at present, the country is undergoing a period of serious trials, it needs to address structural problems that endanger long-term economic growth. The way out of the current situation should be the realization of the potential for growth of advanced sectors and increase of productivity across the national economy. Special attention should be paid to the transition from extractive institutions to inclusive ones. Key factors in accelerating the Ukrainian economy are more vigorous fight against corruption and investment attraction. A set of institutional variables is proposed, which allows for a more thorough assessment of the nature of economic transformation in Ukraine and detection of such deviations – transformation of the national economy occurs at different speeds. Along with the traditional shifts in the structure of GDP (the dominating share of services, there’s still insignificant statistical effect of such important institutional categories as the level of political globalization, the control of corruption, the level of property rights protection, the rule of law, and the level of social globalization.

  7. A New Coherent Science Content Storyline Astronomy Course for Pre-Service Teachers at Penn State

    Science.gov (United States)

    Palma, Christopher; Plummer, Julia; Earth and Space Science Partnership

    2016-01-01

    The Earth and Space Science Partnership (ESSP) is a collaboration among Penn State scientists, science educators and seven school districts across Pennsylvania. One of the ESSP goals has been to provide pre-service teachers with new or improved science course offerings at Penn State in the Earth and Space Science domains. In particular, we aim to provide students with opportunities to learn astronomy content knowledge through teaching methods that engage them in investigations where they experience the practices used by astronomers. We have designed a new course that builds on our research into students' ideas about Solar System astronomy (Plummer et al. 2015) and the curriculum our team created for a professional development workshop for in-service teachers (Palma et al. 2013) with this same theme. The course was offered for the first time in the spring 2015 semester. We designed the course using a coherent science content storyline approach (see, e.g., Palma et al. 2014), which requires all of the student investigations to build towards a big idea in science; in this case, we chose the model for formation of our Solar System. The course led pre-service teachers through a series of investigations that model the type of instruction we hope they will adopt in their own classrooms. They were presented with a series of research questions that all tie in to the big idea of Solar System formation, and they were responsible for collecting and interpreting their own data to draw evidence-based conclusions about one aspect of this model. Students in the course were assessed on their astronomy content knowledge, but also on their ability to construct arguments using scientific reasoning to answer astronomy questions. In this poster, we will present descriptions of the investigations, the assessments used, and our preliminary results about how the course led this group of pre-service teachers to improved understanding of astronomy content and the practices astronomers use in

  8. PRELATIONSHIP BETWEEN TRANSFORMATIONAL LEADERSHIP, EMPOWERMENT AND FOLLOWERS’ PERFORMANCE: A EMPIRICAL STUDY IN MALAYSIA

    Directory of Open Access Journals (Sweden)

    Azman Ismail

    2009-07-01

    Full Text Available Further research reveals that the effect of transformational leadership on followers’ performance is indirectly affected by empowerment. The nature of this relationship is less emphasized in organizational leadership literature. Therefore, this study was conducted to examine the effect of transformational leadership on followers’ performance and investigate the mediating effect of empowerment in the relationship between transformational leadership and followers’ performance. Findings showed that the relationship between empowerment and transformational leadership had increased followers’ performance. This result confirms that empowerment acts as a full mediating role in the leadership model of the studied organization.

  9. Media business transformation based on information technology : A pilot study of three Swedish newspapers

    OpenAIRE

    Sadat Alavioon, Samin

    2017-01-01

    The newspaper industry has been transformed after the emergence of information technology. According to the transformation of media businesses by technology advancement this study realizes the importance of opportunities and threats brought by new information technology in the newspaper industry. Therefore, to develop an understanding of how the newspaper industry can transform due to technology advancement three research questions were answered; RQ 1. How can information technologies transfo...

  10. A technique to study Meloidogyne arenaria resistance in Agrobacterium rhizogenes-transformed peanut

    Science.gov (United States)

    A reliable peanut root transformation system would be useful to study the functions of genes involved in root biology and disease resistance. The objective of this study was to establish an effective protocol to produce composite plants mediated by Agrobacterium rhizogenes transformation. More tha...

  11. Heading for Success: Three Case Studies of School Transformation through Capital Construction

    Science.gov (United States)

    Chen, Wen-Yan; Pan, Hui-Ling Wendy

    2016-01-01

    Utilizing capital as a construct to analyze leadership that triggers school transformation is a newly emerged perspective. This study employed the capital theory as the framework to explore how schools undertook the transformative tasks by multi-case study. Three secondary schools in Taiwan were recruited to investigate how leaders constructed the…

  12. Here's the beef: A case study in organizational transformation

    Science.gov (United States)

    Huseonica, William F.; Giardino, Marco J.

    The Science and Technology Lab (STL) is tasked with the design, development, and application of the science and engineering services. Formed in the early 1970's STL adhered to many traditional attitudes including barriers to communication, excessive management control, parochial strategies, unclear measures of success, lack of customer focus, underutilization of people, and excessive administrative burdens on scientists and engineers. The challenge for the STL was to maximize customer satisfaction through the effective and efficient application of the notable skills and talents of the STL's workforce. In this way, the Lab would begin its exciting journey toward becoming world class. A discussion of this on-going transformation is presented.

  13. Fourier transform infrared studies in solid egg white lysozyme

    International Nuclear Information System (INIS)

    Rivzi, T.Z.

    1994-12-01

    Fourier Transform Infrared (FTIR) Spectroscopy is the most recent addition to the arsenal of bioanalytical techniques capable of providing information about the secondary structure of proteins in a variety of environments. FTIR spectra have been obtained in solid egg white lysozyme. The spectra display the usual amide I, II and III bands. Secondary structural information obtained from the spectra after applying resolution enhancement techniques to the amide I band has been found consistent with the x-ray crystallographic data of the protein and also to the spectroscopic data of the protein in aqueous solution. (author). 17 refs, 6 figs, 2 tabs

  14. Power reactor services provided by the Penn State Radiation Science and Engineering Center

    International Nuclear Information System (INIS)

    Voth, M.H.; Jester, W.A.

    1993-01-01

    The power reactor industry emerged from extensive research and development performed at nonpower reactors (NPRs). As the industry matures, NPRs continue to support and enhance power reactor technology. With the closure of many government and private industry NPRS, there is an increasing call for the 33 universities with operating research reactors to provide the needed services. The Penn State Radiation Science and Engineering Center (RSEC) includes a 1-MW pool-type pulsing TRIGA reactor, a neutron beam laboratory with real-time neutron radiography equipment, hot cells with master-slave manipulators for remote handling of radioactive materials, a gamma-ray irradiation pool, a low-level radiation monitoring laboratory, and extensive equipment for radiation monitoring, dosimetry, and material properties determination. While equipment is heavily utilized in the instructional and academic research programs, significant time remains available for service work. Cost recovery for service work generates income for personnel, equipment maintenance, and facility improvements. With decreasing federal and state funding for educational programs, it is increasingly important that facilities be fully utilized to generate supplementary revenue. The following are examples of such work performed at the RSEC

  15. Final report to DOE: Matching Grant Program for the Penn State University Nuclear Engineering Program

    International Nuclear Information System (INIS)

    Jack S. Brenizer, Jr.

    2003-01-01

    The DOE/Industry Matching Grant Program is designed to encourage collaborative support for nuclear engineering education as well as research between the nation's nuclear industry and the U.S. Department of Energy (DOE). Despite a serious decline in student enrollments in the 1980s and 1990s, the discipline of nuclear engineering remained important to the advancement of the mission goals of DOE. The program is designed to ensure that academic programs in nuclear engineering are maintained and enhanced in universities throughout the U.S. At Penn State, the Matching Grant Program played a critical role in the survival of the Nuclear Engineering degree programs. Funds were used in a variety of ways to support both undergraduate and graduate students directly. Some of these included providing seed funding for new graduate research initiatives, funding the development of new course materials, supporting new teaching facilities, maintenance and purchase of teaching laboratory equipment, and providing undergraduate scholarships, graduate fellowships, and wage payroll positions for students

  16. Study on renormalization transformation for U(1) gauge theory in the neighbourhood of gaussian fixed point

    International Nuclear Information System (INIS)

    Neves, A.G.M.

    1988-01-01

    The renormalization transformation e sup(-S 1) sup((B)) const. ζ e sup(-S o (A) - V(A)) δ (B-C sub(1) A) δ sub(Ax) (A)DA for the U(1) lattice gauge theory, where S sub(o) (A) is the gaussian fixed point of the transformation, V(A) is a gauge invariant perturbation, C sub(1) is the averaging operator and δ sub(Ax) (A) fixes the local axial gauge is studied via an equivalent renormalization transformation on the 2-forms F = dA. The transformation is linearized in the neighborhood of the fixed point and then diagonalized. (author)

  17. The Cortex Transform as an image preprocessor for sparse distributed memory: An initial study

    Science.gov (United States)

    Olshausen, Bruno; Watson, Andrew

    1990-01-01

    An experiment is described which was designed to evaluate the use of the Cortex Transform as an image processor for Sparse Distributed Memory (SDM). In the experiment, a set of images were injected with Gaussian noise, preprocessed with the Cortex Transform, and then encoded into bit patterns. The various spatial frequency bands of the Cortex Transform were encoded separately so that they could be evaluated based on their ability to properly cluster patterns belonging to the same class. The results of this study indicate that by simply encoding the low pass band of the Cortex Transform, a very suitable input representation for the SDM can be achieved.

  18. Near infrared spectroscopy in the study of polymorphic transformations

    Energy Technology Data Exchange (ETDEWEB)

    Blanco, Marcel [Department of Chemistry, Analytical Chemistry Unity, Faculty of Sciences, Autonomous University of Barcelona, E-08193 Bellaterra, Barcelona (Spain)]. E-mail: marcel.blanco@uab.es; Alcala, Manel [Department of Chemistry, Analytical Chemistry Unity, Faculty of Sciences, Autonomous University of Barcelona, E-08193 Bellaterra, Barcelona (Spain); Gonzalez, Josep M. [Laboratorios Menarini S.A., c/. Alfons XII, 587, E-08918 Badalona, Barcelona (Spain); Torras, Ester [Laboratorios Menarini S.A., c/. Alfons XII, 587, E-08918 Badalona, Barcelona (Spain)

    2006-05-17

    The potential of near infrared (NIR) spectroscopy for the characterization of polymorphs in the active principle of a commercial formulation prior to and after the manufacturing process was assessed. Polymorphism in active principles is extremely significant to the pharmaceutical industry. Polymorphic changes during the production of commercial pharmaceutical formulations can alter some properties of the resulting end-products. Multivariate curve resolution-alternating least squares (MCR-ALS) methodology was used to obtain the 'pure' NIR spectrum for the active principle without the need to pretreat samples. This methodology exposed the polymorphic transformation of Dexketoprofen Trometamol (DKP) in both laboratory and production samples obtained by wet granulation. No polymorphic transformation, however, was observed in samples obtained by direct compaction. These results were confirmed using by X-ray powder diffractometry (XRD) and differential scanning calorimetry (DSC) measurements. Pure crystalline polymorphs of DKP were available in the laboratory but amorphous form was not, nevertheless the developed methodology allows the identification of amorphous and crystal forms in spite of the lack of pure DKP.

  19. The Best Practices for School Transformation: A Multiple-Case Study

    Science.gov (United States)

    Waheed, Zarina; Hussin, Sufean; Bin Megat Daud, Megat Ahmad Kamaluddin

    2018-01-01

    Purpose: The purpose of this paper is to explore the best practices of school leaders, teachers, pupils, parents and the community in selected transformed schools in Selangor, Malaysia. Design/methodology/approach: This qualitative multiple-case study explores the best practices in two selected transformed schools through in-depth interviews,…

  20. Study of the rates of dissemination of elastic waves with diffraction transformation of seismic recordings. [USSR

    Energy Technology Data Exchange (ETDEWEB)

    Telegin, A.N.; Bulatov, M.G.

    1982-01-01

    An algorithm is proposed for determining effective velocities in the process of diffraction transformation of seismic waves. It is based on summation with conjugate recordings. Results of the study of velocities are indicated in materials of Sakhalin. A difference is noted in the procedures for computing effective velocities in the OGT method and diffraction transformation.

  1. Comparative Study of Phase Transformation in Single-Crystal Germanium during Single and Cyclic Nanoindentation

    Directory of Open Access Journals (Sweden)

    Koji Kosai

    2017-11-01

    Full Text Available Single-crystal germanium is a semiconductor material which shows complicated phase transformation under high pressure. In this study, new insight into the phase transformation of diamond-cubic germanium (dc-Ge was attempted by controlled cyclic nanoindentation combined with Raman spectroscopic analysis. Phase transformation from dc-Ge to rhombohedral phase (r8-Ge was experimentally confirmed for both single and cyclic nanoindentation under high loading/unloading rates. However, compared to single indentation, double cyclic indentation with a low holding load between the cycles caused more frequent phase transformation events. Double cyclic indentation caused more stress in Ge than single indentation and increased the possibility of phase transformation. With increase in the holding load, the number of phase transformation events decreased and finally became less than that under single indentation. This phenomenon was possibly caused by defect nucleation and shear accumulation during the holding process, which were promoted by a high holding load. The defect nucleation suppressed the phase transformation from dc-Ge to r8-Ge, and shear accumulation led to another phase transformation pathway, respectively. A high holding load promoted these two phenomena, and thus decreased the possibility of phase transformation from dc-Ge to r8-Ge.

  2. Transformative Learning and Professional Identity Formation During International Health Electives: A Qualitative Study Using Grounded Theory.

    Science.gov (United States)

    Sawatsky, Adam P; Nordhues, Hannah C; Merry, Stephen P; Bashir, M Usmaan; Hafferty, Frederic W

    2018-03-27

    International health electives (IHEs) are widely available during residency and provide unique experiences for trainees. Theoretical models of professional identity formation and transformative learning may provide insight into residents' experiences during IHEs. The purpose of this study was to explore transformative learning and professional identity formation during resident IHEs and characterize the relationship between transformative learning and professional identity formation. The authors used a constructivist grounded theory approach, with the sensitizing concepts of transformative learning and professional identity formation to analyze narrative reflective reports of residents' IHEs. The Mayo International Health Program supports residents from all specialties across three Mayo Clinic sites. In 2015, the authors collected narrative reflective reports from 377 IHE participants dating from 2001-2014. Reflections were coded and themes were organized into a model for transformative learning during IHEs, focusing on professional identity. Five components of transformative learning were identified during IHEs: a disorienting experience; an emotional response; critical reflection; perspective change; and a commitment to future action. Within the component of critical reflection three domains relating to professional identity were identified: making a difference; the doctor-patient relationship; and medicine in its "purest form." Transformation was demonstrated through perspective change and a commitment to future action, including continued service, education, and development. IHEs provide rich experiences for transformative learning and professional identity formation. Understanding the components of transformative learning may provide insight into the interaction between learner, experiences, and the influence of mentors in the process of professional identity formation.

  3. A rheumatoid arthritis study by Fourier transform infrared spectroscopy

    Science.gov (United States)

    Carvalho, Carolina S.; Silva, Ana Carla A.; Santos, Tatiano J. P. S.; Martin, Airton A.; dos Santos Fernandes, Ana Célia; Andrade, Luís E.; Raniero, Leandro

    2012-01-01

    Rheumatoid arthritis is a systemic inflammatory disease of unknown causes and a new methods to identify it in early stages are needed. The main purpose of this work is the biochemical differentiation of sera between normal and RA patients, through the establishment of a statistical method that can be appropriately used for serological analysis. The human sera from 39 healthy donors and 39 rheumatics donors were collected and analyzed by Fourier Transform Infrared Spectroscopy. The results show significant spectral variations with p<0.05 in regions corresponding to protein, lipids and immunoglobulins. The technique of latex particles, coated with human IgG and monoclonal anti-CRP by indirect agglutination known as FR and CRP, was performed to confirm possible false-negative results within the groups, facilitating the statistical interpretation and validation of the technique.

  4. Study of gluon condensates using the Bogolyubov transformation

    International Nuclear Information System (INIS)

    Iracane, Daniel

    1985-01-01

    We describe the ground state of non-perturbative QCD as a gluon condensate. In the framework of the Coulomb gauge Hamiltonian, we introduce an effective interaction between infrared gluons by removing high-momentum gluons. The Bogoliubov transformation provides us with our variational space. The minimisation over this Fock subspace leads to a non-perturbative vacuum and its excitations. The minimum functional space for a boson dynamic is a distribution set. We find two kinds of condensation. The first one occurs only for zero-momentum states and looks like the Bose Condensation. In the second one, the quasiparticle spectrum shows a finite gap and the vacuum is a superconducting state. We give constraints on the interaction so that the superconducting phase is more bounded than the Bose one. (author) [fr

  5. Study of the phase transformations in Ni2MnGa by capacitance dilatometry

    International Nuclear Information System (INIS)

    Wu, X D; Finlayson, T R

    2007-01-01

    High precision capacitance dilatometry has been used to study the phase transformations in a Ni 2 MnGa single crystal. The results show that capacitance dilatometry is an effective method to study the phase transformations. The thermal strain accompanying the martensitic transformation was not reproducible, but became more reproducible with the application of external stress. The first-order character of the martensitic transformation was enhanced by external stress. The intermediate transformation temperature decreased with increasing external stress with a temperature coefficient of -2.40 K MPa -1 . The coefficient of thermal expansion was 1.7 x 10 -5 K -1 for the parent phase and 1.4 x 10 -5 K -1 for the intermediate phase

  6. Transmodern Critical Tourism Studies: A Call for Hope and Transformation

    Directory of Open Access Journals (Sweden)

    Irena Ateljevic

    2011-12-01

    Full Text Available AbstractIn this paper I engage with a broad range of literature that provides evidence of an emerging and significant paradigm shift in human evolution as we face an increasingly distressed and unsustainable world that screams for some hope and transformation. To describe this shift, different authors use a variety of terms, such as transmodernity paradigm (Ghisi; transmodern philosophy of political liberation (Dussel; Hegelian dialectical triad of thesis, antithesis and synthesis (Magda; reflective/living-systems paradigm (Elgin; partnership model of caring economics (Eisler; relational global consciousness and biosphere politics (Rifkin. Reviewing a broad range of these perspectives, I will argue that tourism is actually one of the key indicators that manifest the global shift in human consciousness. In consequence, an engagement with transmodern critical tourism studies and hopeful tourism scholarship gives us an enormous political weight to point to the agency and authority of tourism to possibly change the world for the better and assist it in its longings for more caring global economy and society. In doing so, we can finally penetrate public discourses and change their dominant interpretations of tourism as being nothing more than a frivolous leisure activity or yet another form of economic developmentKeywords: tMalignant transformation of Taiwanese patients with oral leukoplakia: A nationwide population-based retrospective cohort study

    Directory of Open Access Journals (Sweden)

    Tung-Yuan Wang

    2018-05-01

    Full Text Available Background/Purpose: Oral leukoplakia (OL is one of the clinically diagnosed oral potentially malignant disorders (OPMDs with an increased risk of oral cancer development. In this study, we investigated the malignant transformation of OL in Taiwanese population. Methods: A retrospective cohort study was analyzed from Taiwan's National Health Insurance Research Database. A comparison cohort was randomly frequency-matched with the OL cohort according to age, sex, and index year. Oral submucous fibrosis (OSF and oral lichen planus (OLP were further stratified to evaluate the possible synergistic effects for OL-associated malignant transformation. Results: In this cohort, 102 (5.374% of 1898 OL patients were observed to transform into oral cancer. The malignant transformation rate was 26.40-fold in the OL cohort than in the comparison cohort after adjustment (95% confidence intervals 18.46–37.77. To further stratify with OSF and OLP, OL with OSF (58.38; 95% confidence intervals 34.61–98.50 and OL with OLP (36.88; 95% confidence intervals 8.90–152.78 had higher risk of malignant transformation rate than OL alone (27.01; 95% confidence intervals 18.91–38.59. The Kaplan–Meier plot revealed the free of malignant transformation rate was significant over the 13 years follow-up period (log-rank test, p < 0.001. Conclusion: OL patients exhibited a significantly higher risk of malignant transformation than those without OL. In addition, both OSF and OLP could enhance malignant transformation in patients with OL. However, further studies are required to identify the histopathological and clinical parameters in the pathogenesis of malignant transformation among OPMDs. Keywords: Oral leukoplakia, Oral submucous fibrosis, Oral lichen planus, Malignant transformation, Nationwide population, Cohort study, Taiwan

  7. Compton suppression system at Penn State Radiation Science and Engineering Center

    International Nuclear Information System (INIS)

    Cetiner, N.Oe.; Uenlue, K.; Brenizer, J.S.

    2008-01-01

    A Compton suppression system is used to reduce the contribution of scattered gamma-rays that originate within the HPGe detector to the gamma ray spectrum. The HPGe detector is surrounded by an assembly of guard detectors, usually NaI(Tl). The HPGe and NaI(Tl) detectors are operated in anti-coincidence mode. The NaI(Tl) guard detector detects the photons that Compton scatter within, and subsequently escape from the HPGe detector. Since these photons are correlated with the partial energy deposition within the detector, much of the resulting Compton continuum can be subtracted from the spectrum reducing the unwanted background in gamma-ray spectra. A commercially available Compton suppression spectrometer (CSS) was purchased from Canberra Industries and tested at the Radiation Science and Engineering Center at Penn State University. The PSU-CSS includes a reverse bias HPGe detector, four annulus NaI(Tl) detectors, a NaI(Tl) plug detector, detector shields, data acquisition electronics, and a data processing computer. The HPGe detector is n-type with 54% relative efficiency. The guard detectors form an annulus with 9-inch diameter and 9-inch height, and have a plug detector that goes into/out of the annulus with the help of a special lift apparatus to raise/lower. The detector assembly is placed in a shielding cave. State-of-the-art electronics and software are used. The system was tested using standard sources, neutron activated NIST SRM sample and Dendrochronologically Dated Tree Ring samples. The PSU-CSS dramatically improved the peak-to-Compton ratio, up to 1000 : 1 for the 137 Cs source. (author)

  8. Severe transient analysis of the Penn State University Advanced Light Water Reactor

    International Nuclear Information System (INIS)

    Borkowski, J.A.

    1988-08-01

    The Penn State University Advanced Light Water Reactor (PSU ALWR) incorporates various passive and active ultra-safe features, such as continuous online injection and letdown for pressure control, a raised-loop primary system for enhanced natural circulation, a dedicated primary reservoir for enhanced thermal hydraulic control, and a secondary shutdown turbine. Because of the conceptual design basis of the project, the dynamic system modeling was to be performed using a code with a high degree of flexibility. For this reason the modeling has been performed with the Modular Modeling System (MMS). The basic design and normal transients have been performed successfully with MMS. However, the true test of an inherently safe concept lies in its response to more brutal transients. Therefore, such a demonstrative transient is chosen for the PSU ALWR: a turbine trip and reactor scram, concurrent with total loss of offsite ac power. Diesel generators are likewise unavailable. This transient demonstrates the utility of the pressure control system, the shutdown turbine generator, and the enhanced natural circulation of the PSU ALWR. The low flow rates, low pressure drops, and large derivative states encountered in such a transient pose special problems for the modeler and for MMS. The results of the transient analyses indicate excellent performance by the PSU ALWR in terms of inherently safe operation. The primary coolant enters full natural circulation, and removes all decay heat through the steam generators. Further, the steam generators continually supply sufficient steam to the shutdown power system, despite the abrupt changeover to the auxiliary feedwater system. Finally, even with coincident failures in the pressurization system, the primary repressurizes to near-normal values, without overpressurization. No core boiling or uncovery is predicted, and consequently fuel damage is avoided. 17 refs., 19 figs., 4 tabs

  9. On the study of the solid-solid phase transformation of TlBiTe2

    International Nuclear Information System (INIS)

    Chrissafis, K.; Vinga, E.S.; Paraskevopoulos, K.M.; Polychroniadis, E.K.

    2003-01-01

    The narrow gap semiconductor TlBiTe 2 undergoes a solid-solid phase transformation from the rhombohedral (D 3d ) to the cubic (O h ) phase. The present paper deals with the study of this phase transformation combining the results of Differential Scanning Calorimetry (DSC) and Transmission Electron Microscopy (TEM). It has been found that during heating the transformation is an athermal activated process, which can be described only by a combination of more than one processes while during cooling it exhibits an expectable thermal hysteresis due to the volume difference. The results of the kinetic analysis combined with the electron microscopy findings, supported also by the Fourier Transform Infrared (FTIR) spectroscopy ones, lead to the conclusion that TlBiTe 2 undergoes a multiple-step, displacive, martensitic type transformation. (Abstract Copyright [2003], Wiley Periodicals, Inc.)

  10. Dynamic Diffraction Studies on the Crystallization, Phase Transformation, and Activation Energies in Anodized Titania Nanotubes.

    Science.gov (United States)

    Albetran, Hani; Vega, Victor; Prida, Victor M; Low, It-Meng

    2018-02-23

    The influence of calcination time on the phase transformation and crystallization kinetics of anodized titania nanotube arrays was studied using in-situ isothermal and non-isothermal synchrotron radiation diffraction from room temperature to 900 °C. Anatase first crystallized at 400 °C, while rutile crystallized at 550 °C. Isothermal heating of the anodized titania nanotubes by an increase in the calcination time at 400, 450, 500, 550, 600, and 650 °C resulted in a slight reduction in anatase abundance, but an increase in the abundance of rutile because of an anatase-to-rutile transformation. The Avrami equation was used to model the titania crystallization mechanism and the Arrhenius equation was used to estimate the activation energies of the titania phase transformation. Activation energies of 22 (10) kJ/mol for the titanium-to-anatase transformation, and 207 (17) kJ/mol for the anatase-to-rutile transformation were estimated.

  11. Experimental study of stress-induced localized transformation plastic zones in tetragonal zirconia polycrystalline ceramics

    International Nuclear Information System (INIS)

    Sun, Q.; Zhao, Z.; Chen, W.; Qing, X.; Xu, X.; Dai, F.

    1994-01-01

    Stress-induced martensitic transformation plastic zones in ceria-stabilized tetragonal zirconia polycrystalline ceramics (Ce-TZP), under loading conditions of uniaxial tension, compression, and three-point bending, are studied by experiments. The transformed monoclinic phase volume fraction distribution and the corresponding plastic strain distribution and the surface morphology (surface uplift) are measured by means of moire interferometry, Raman microprobe spectroscopy, and the surface measurement system. The experimental results from the above three kinds of specimens and methods consistently show that the stress-induced transformation at room temperature of the above specimen is not uniform within the transformation zone and that the plastic deformation is concentrated in some narrow band; i.e., macroscopic plastic flow localization proceeds during the initial stage of plastic deformation. Flow localization phenomena are all observed in uniaxial tension, compression, and three-point bending specimens. Some implications of the flow localization to the constitutive modeling and toughening of transforming thermoelastic polycrystalline ceramics are explored

  12. Synchrotron radiation : characteristics and application in structural studies and phase transformations of materials

    International Nuclear Information System (INIS)

    Craievich, A.F.

    1984-01-01

    The main characteristics of the synchrotron radiation for studying atomic structure and phase transformations in materials are presented. Some specific applications in alloys, glass and solids are described. (E.G.) [pt

  13. Malignant transformation of Taiwanese patients with oral leukoplakia: A nationwide population-based retrospective cohort study.

    Science.gov (United States)

    Wang, Tung-Yuan; Chiu, Yu-Wei; Chen, Yi-Tzu; Wang, Yu-Hsun; Yu, Hui-Chieh; Yu, Chuan-Hang; Chang, Yu-Chao

    2018-05-01

    Oral leukoplakia (OL) is one of the clinically diagnosed oral potentially malignant disorders (OPMDs) with an increased risk of oral cancer development. In this study, we investigated the malignant transformation of OL in Taiwanese population. A retrospective cohort study was analyzed from Taiwan's National Health Insurance Research Database. A comparison cohort was randomly frequency-matched with the OL cohort according to age, sex, and index year. Oral submucous fibrosis (OSF) and oral lichen planus (OLP) were further stratified to evaluate the possible synergistic effects for OL-associated malignant transformation. In this cohort, 102 (5.374%) of 1898 OL patients were observed to transform into oral cancer. The malignant transformation rate was 26.40-fold in the OL cohort than in the comparison cohort after adjustment (95% confidence intervals 18.46-37.77). To further stratify with OSF and OLP, OL with OSF (58.38; 95% confidence intervals 34.61-98.50) and OL with OLP (36.88; 95% confidence intervals 8.90-152.78) had higher risk of malignant transformation rate than OL alone (27.01; 95% confidence intervals 18.91-38.59). The Kaplan-Meier plot revealed the free of malignant transformation rate was significant over the 13 years follow-up period (log-rank test, p < 0.001). OL patients exhibited a significantly higher risk of malignant transformation than those without OL. In addition, both OSF and OLP could enhance malignant transformation in patients with OL. However, further studies are required to identify the histopathological and clinical parameters in the pathogenesis of malignant transformation among OPMDs. Copyright © 2018. Published by Elsevier B.V.

  14. Application of Laplace transform to analysis of the excretory organs radionuclide study

    International Nuclear Information System (INIS)

    Knigavko, V.G.; Pilipenko, M.Yi.; Pakhomov, V.Yi.; Lyisovij, V.M.; Nesterov, V.G.; Bondarenko, M.A.

    1993-01-01

    The paper is devoted to application of Laplace transform to solving equations at performing stochastic mathematical modelling of radiopharmaceuticals (RP) transportation in the studied organs. Application of this method allows to derive a formula for transformation of the curves of RP excretion from the body at intravenous administration, i.e. provides the possibility to calculate traditional values at extravascular administration of the preparations. Application of Laplace transform with bioexponencial approximation of the blood clearance curve also allows to develop a new algorithm of radionephrogram deconvolution analysis

  15. Phase transformation in delta Pu alloys at low temperature: in situ dilatometric study

    Energy Technology Data Exchange (ETDEWEB)

    Texier, G.; Oudot, B.; Platteau, C.; Ravat, B.; Delaunay, F. [CEA Valduc, 21 - Is-sur-Tille (France)

    2010-07-01

    The purpose of this work is to precisely study the martensitic transformation in a plutonium-gallium alloy. Thus, the thermodynamics and kinetics of the {delta} {yields} {alpha}' + {delta} transformation in a Pu-Ga alloy were studied under isochronal and isothermal conditions. The activation energy of the {delta} {yields} {alpha}' + {delta} phase transformation at a constant cooling rate (0.5 K. min{sup -1}) was determined by using Kissinger and Ozawa models. The average value of the activation energy was found to be at -56 kJ.mol{sup -1}. Dilatometry measurement was also used to trace 'in situ' the entire transformation for several temperatures. The kinetics of the {delta} {yields} {alpha}' + {delta} transformation were modelled under isothermal conditions in the theoretical frame of the Johnson-Mehl-Avrami-Kolmogorov (JMAK) theory. It is proposed that the transformation consists of three stages. The {alpha}' transformation begins with a nucleation of pre-existing embryos. Then, both nucleation and rapid growth of {alpha}' occurs simultaneously and finally, the plates width expend. Apparent activation energies for nucleation and growth transformation were determined from the temperature dependence of the constant K at respectively -34 kJ.mol{sup -1} and -60 kJ.mol{sup -1}. Dler et al. [1] investigated also the thermodynamics and the kinetics of the martensitic transformation in Pu alloys. These nucleation energies were found by modelling of heterogeneous martensitic nucleation via strain interaction with observed superdislocation-like nucleation sites in PuGa alloys. The values obtain by this model was very close to those we find. Investigations in steels alloys indicate that these energies are of the same order for nucleation near dislocation. Then, it could be indicating a strong relationship between these dislocations and martensitic nucleation sites. (authors)

  16. Phase transformation in {delta} Pu alloys at low temperature: In situ dilatometric study

    Energy Technology Data Exchange (ETDEWEB)

    Texier, G; Oudot, B; Platteau, C; Ravat, B; Delaunay, F, E-mail: gwenael.texier@cea.fr, E-mail: benoit.oudot@cea.fr [CEA, DAM, Valduc, Is sur Tille 21120 (France)

    2010-03-15

    The purpose of this work is to precisely study the martensitic transformation in a plutonium-gallium alloy. Thus, the thermodynamics and kinetics of the {delta}{yields}{alpha}'+{delta} phase transformation in a Pu-Ga alloy were studied under isochronal and isothermal conditions. The activation energy of the {delta}{yields}{alpha}'+{delta} phase transformation at a constant cooling rate (0.5 K.min{sup -1}) was determined by using Kissinger and Ozawa models. The average value of the activation energy was found to be at -56 kJ.mol{sup -1}. Dilatometry measurement was also used to trace 'in situ' the entire transformation for several temperatures. The kinetics of the {delta}{yields}{alpha}'+{delta} transformation were modelled under isothermal conditions in the theoretical frame of the Johnson-Mehl-Avrami-Kolmogorov (JMAK) theory. It is proposed that the transformation consists of three stages. The {alpha}' transformation begins with a nucleation of pre-existing embryos. Then, both nucleation and rapid growth of {alpha}' occurs simultaneously and finally, the plates width expend. Apparent activation energies for nucleation and growth transformation were determined from the temperature dependence of the constant K at respectively -34 kJ.mol{sup -1} and -60 kJ.mol{sup -1}. Adler et al. [1] investigated also the thermodynamics and the kinetics of the martensitic transformation in Pu alloys. These nucleation energies were found by modelling of heterogeneous martensitic nucleation via strain interaction with observed superdislocation-like nucleation sites in PuGa alloys. The values obtain by this model was very close to those we find. Investigations in steels alloys indicate that these energies are of the same order for nucleation near dislocation. Then, it could be indicating a strong relationship between these dislocations and martensitic nucleation sites.

  17. The relationship between internationalisation, creativity and transformation: A case study of higher education in Hungary

    Directory of Open Access Journals (Sweden)

    Melanie K. Smith

    2017-09-01

    Full Text Available The main objective of this article is to explore the relationship between internationalisation, creativity and transformation in the context of higher education. It is argued in academic theory that the process of internationalisation in higher education has two pillars: transformational learning and creative development, and that creativity is an integral part of transformational learning. To explore this relationship further, the authors draw on primary research undertaken in the context of a higher education institution in Budapest, Hungary. A Delphi study with senior academic staff and a focus group with Hungarian and international students were included in the research. Questions were asked which aimed to determine whether creativity is indeed an integral part of transformational learning, and whether creativity and transformation are the most important elements of internationalisation. Staff and students recognise the creative and transformative potential of internationalisation, but they also identified several challenges. These include encouraging students to go beyond instrumental approaches to learning, providing staff with the relevant training and support, changing the culture of institutions and overcoming the lack of flexibility in existing national education structures. Overall, the research findings reinforced theoretical perspectives, which propose creative thinking, cooperative and communicative learning, project-based and problem-solving activities as some of the main tools in the process of transformational learning and prerequisites for internationalisation.

  18. The effects of transformational and change leadership on employees' commitment to a change: a multilevel study.

    Science.gov (United States)

    Herold, David M; Fedor, Donald B; Caldwell, Steven; Liu, Yi

    2008-03-01

    The effects of transformational leadership on the outcomes of specific change initiatives are not well understood. Conversely, organizational change studies have examined leader behaviors during specific change implementations yet have failed to link these to broader leadership theories. In this study, the authors investigate the relationship between transformational and change leadership and followers' commitment to a particular change initiative as a function of the personal impact of the changes. Transformational leadership was found to be more strongly related to followers' change commitment than change-specific leadership practices, especially when the change had significant personal impact. For leaders who were not viewed as transformational, good change-management practices were found to be associated with higher levels of change commitment. Copyright 2008 APA

  19. Sea-Level Static Testing of the Penn State Two-Dimensional Rocket-Based Combined Cycle (RBCC) Testbed

    Science.gov (United States)

    Cramer, J. M.; Marshall, W. M.; Pal, S.; Santoro, R. J.

    2003-01-01

    Twin thruster tests have been conducted with the Penn State RBCC test article operating at sea- level static conditions. Significant differences were observed in the performance characteristics for two different thruster centerline spacings. Changing the thruster spacing from 2.50 to 1.75 in. reduced the entrained air velocity (-17%) and the thrust (-7%) for tests at a thruster chamber pressure of 200 psia and MR = 8. In addition, significant differences were seen in the static pressure profiles, the Raman spectroscopy profiles, and the acoustic power spectrum for these two configurations.

  1. Ask! Your Library at the HUB: Penn State Libraries’ Experiences Providing Reference Services at the Campus Student Union Building

    Directory of Open Access Journals (Sweden)

    Anne Charlotte Behler

    2008-06-01

    Full Text Available The Web 2.0 generation presents many service challenges to libraries. College students of today have work styles that emphasize collaboration, preference for flexible and comfortable spaces, and independent discovery of information. Given that challenge, it is important for libraries to experiment with new and unique models of service. Librarians and Staff at the Penn State University Libraries explored offering library service at the main campus’s student union building during two trials, during the Spring and Fall semesters of 2006.

  2. Influence of Transformational and Transactional Leadership Towards Employee Performance (study at PT Ekistindo, Makassar)

    OpenAIRE

    Idayanti

    2012-01-01

    The purpose of this study was to anallze (1) the significances of the transformational leadership and transactional leadership to employees performance, and (2) the dominant variable affecting employee performance. From the sample that consisted of 102 respondent, the analysis used multiple linear regression to determine a model which best predicts the performance of these firms. Result of this research shown that transformational and transactional leadership variables have significant effect...

  3. Application of the Analog Method to Modelling Heat Waves: A Case Study with Power Transformers

    Science.gov (United States)

    2017-04-21

    UNCLASSIFIED Massachusetts Institute of Technology Lincoln Laboratory APPLICATION OF THE ANALOG METHOD TO MODELLING HEAT WAVES: A CASE STUDY WITH...18 2 Calibration and validation statistics with the use of five atmospheric vari- ables to construct analogue diagnostics for JJA of transformer T2...electrical grid as a series of nodes (transformers) and edges (transmission lines) so that basic mathematical anal- ysis can be performed. The mathematics

  4. Study of martensitic transformation in stainless steel by CEMS and RBS channeling

    International Nuclear Information System (INIS)

    Hayashi, N.; Sakamoto, I.; Tanoue, H.

    1993-01-01

    The effect of Xe ion irradiation in a single crystal of 17/13 stainless steel has been studied, using RBS channeling techniques and conversion electron Moessbauer spectroscopy (CEMS). 300 keV Xe ions were used to induce martensitic transformation in the austentic steel. A dynamic behavior of the transformation was observed as functions of the fluence and depth dependence. The martensite appears abruptly at a critical fluence, in contrast with polycrystalline 17/7 stainless steel. (orig.)

  5. Contribution towards the study of β→α transformation in uranium and its alloys (1962)

    International Nuclear Information System (INIS)

    Aubert, H.

    1962-05-01

    The kinetics of the transformation of uranium alloys containing 0.5 - 0.75 - 1.0 - 1.5 and 3 atoms per cent have been studied. The influence of heat treatment before decomposition has been discussed. The study of the transformation characteristics such as kinetics, residual phases, phenomena connected with the coherence between phases, reversibility below the equilibrium temperature, shows the following mechanisms exhibited during the decomposition of the β phase on lowering the temperature: 1 ) eutectoid, 2) bainitic, 3) martensitic. The study of the TTT diagrams of alloys containing decreasing percentages of chromium indicates that the unalloyed uranium transforms without maintaining the coherence above 600 deg. C, where as at lower temperatures the transformation is mainly martensitic. The various alloying elements can be characterised by their influence on the three TTT curves corresponding to the three possible transformation mechanisms. The ability of the uranium alloys to alpha grain refining during isothermal decomposition or ambient temperature quenching is directly connected with the characteristics of the TTT diagrams and especially to the mode of bainitic transformation. (author) [fr

  6. Creative Transformation in African Art Music: A Case Study # | Adjei ...

    African Journals Online (AJOL)

    The study examines and analyses the significance of the style of music composition employing traditional and contemporary models noted in the solo voice and piano works of Nketia. It argues that an imaginative African contemporary composer can elect to work within the limitations of selected traditional instruments and ...

  7. Beyond Languages, beyond Modalities: Transforming the Study of Semiotic Repertoires

    Science.gov (United States)

    Kusters, Annelies; Spotti, Massimiliano; Swanwick, Ruth; Tapio, Elina

    2017-01-01

    This paper presents a critical examination of key concepts in the study of (signed and spoken) language and multimodality. It shows how shifts in conceptual understandings of language use, moving from bilingualism to multilingualism and (trans)languaging, have resulted in the revitalisation of the concept of language repertoires. We discuss key…

  8. Transforming and enhancing metadata for enduser discovery: a case study

    Directory of Open Access Journals (Sweden)

    Edward M. Corrado

    2014-05-01

    The Libraries’ workflow and portions of code will be shared; issues and challenges involved will be discussed. While this case study is specific to Binghamton University Libraries, examples of strategies used at other institutions will also be introduced. This paper should be useful to anyone interested in describing large quantities of photographs or other materials with preexisting embedded metadata.

  9. Transforming Cultures of Care: A Case Study in Organizational Change

    Science.gov (United States)

    Purvis, Karyn; Cross, David; Jones, Daren; Buff, Gary

    2012-01-01

    The authors report on a small organizational case study highlighting the dimensions of trauma-informed care, the processes of organizational change, and the growth of caregiver expertise. The article is framed by the notion of caregiving cultures, which refers to the beliefs, languages, and practices of caregivers and caregiving organizations.…

  10. Analysis and Countermeasure Study on DC Bias of Main Transformer in a City

    Science.gov (United States)

    Wang, PengChao; Wang, Hongtao; Song, Xinpu; Gu, Jun; Liu, yong; Wu, weili

    2017-07-01

    According to the December 2015 Guohua Beijing thermal power transformer DC magnetic bias phenomenon, the monitoring data of 24 hours of direct current is analyzed. We find that the maximum DC current is up to 25 and is about 30s for the trend cycle, on this basis, then, of the geomagnetic storm HVDC and subway operation causes comparison of the mechanism, and make a comprehensive analysis of the thermal power plant’s geographical location, surrounding environment and electrical contact etc.. The results show that the main reason for the DC bias of Guohua thermal power transformer is the operation of the subway, and the change of the DC bias current is periodic. Finally, of Guohua thermal power transformer DC magnetic bias control method is studied, the simulation results show that the method of using neutral point with small resistance or capacitance can effectively inhibit the main transformer neutral point current.

  11. Mechanistic studies of neoplastic cell transformation by ionizing radiation

    International Nuclear Information System (INIS)

    Yang, T.C.; Craise, L.M.; Tobias, C.A.

    1982-01-01

    As part of the Biology and Medicine heavy-ion radiation program, we are systematically investigating the potential carcinogenic and mutagenic effects of high- and low-linear energy transfer (LET) radiation at the cellular level. From these studies, we anticipate additional insight into the molecular and cellular mechanisms of radiation carcinogenesis. Such results should provide quantitative information useful for assessing the undesirable biological effects of cosmic rays in space. Some of our recent experimental results are presented here

  12. Exploring the impact of transformational leadership on nurse innovation behaviour: a cross-sectional study.

    Science.gov (United States)

    Weng, Rhay-Hung; Huang, Ching-Yuan; Chen, Li-Mei; Chang, Li-Yu

    2015-05-01

    This study explored the influences of transformational leadership on nurse innovation behaviour and the mediating role of organisational climate. Recently, global nursing experts have been aggressively encouraging nurses to pursue innovation in nursing in order to improve nursing outcomes. Nursing innovation, in turn, is affected by nursing leadership. We employed a questionnaire survey to collect data, and selected a sample of nurses from hospitals in Taiwan. A total of 439 valid surveys were obtained. Hierarchical multiple regression model analysis was conducted to test the study hypothesis. The mean values of agreement of nurse innovation behaviour and transformational leadership were 3.40 and 3.78, respectively. Patient safety climate and innovation climate were found to have full mediating effects on the relationship between transformational leadership and innovation behaviour. Organisational climate has a significant impact on innovation behaviour. Transformational leadership has indirect effects on innovation behaviour via the mediation of patient safety climate and innovation climate. Hospitals should enhance transformational leadership by designing leadership training programmes and establishing transformational culture. In addition, nursing managers should foster nursing innovation through improvements in organisational climate. © 2013 John Wiley & Sons Ltd.

  13. Malignant transformation of oral submucous fibrosis in Taiwan: A nationwide population-based retrospective cohort study.

    Science.gov (United States)

    Yang, Po-Yu; Chen, Yi-Tzu; Wang, Yu-Hsun; Su, Ni-Yu; Yu, Hui-Chieh; Chang, Yu-Chao

    2017-11-01

    Oral submucous fibrosis (OSF) is one of the well-recognized oral potentially malignant disorders. In this study, we investigated the malignant transformation of OSF in a Taiwanese population. A retrospective cohort study was analyzed from Taiwan's National Health Insurance Research Database. A comparison cohort was randomly frequency-matched with the OSF cohort according to age, sex, and index year. Oral leukoplakia (OL) was further stratified to evaluate for the possible synergistic effects of OSF-associated malignant transformation. In this cohort, 71 (9.13%) of 778 cases of OSF were observed to transform into oral cancer. The malignant transformation rate was 29.26-fold in the OSF cohort than in the comparison cohort after adjustment (95% confidence intervals 20.55-41.67). To further stratify with OL, OSF with OL (52.46%; 95% confidence intervals 34.88-78.91) had higher risk of malignant transformation rate than OSF alone (29.84%; 95% confidence intervals 20.99-42.42). The Kaplan-Meier plot revealed the rate free of malignant transformation was significant over the 13-year follow-up period (log-rank test, Ptransformation was 5.1, 2.7, and 2.2 years for non-OSF, OSF alone, and OSF with OL, respectively. Oral submucous fibrosis patients exhibited a significantly higher risk of malignant transformation than those without OSF. OL could enhance malignant transformation in patients with OSF. © 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  14. Hydroxyl radical induced transformation of phenylurea herbicides: A theoretical study

    International Nuclear Information System (INIS)

    Mile, Viktória; Harsányi, Ildikó; Kovács, Krisztina; Földes, Tamás; Takács, Erzsébet; Wojnárovits, László

    2017-01-01

    Aromatic ring hydroxylation reactions occurring during radiolysis of aqueous solutions are studied on the example of phenylurea herbicides by Density Functional Theory calculations. The effect of the aqueous media is taken into account by using the Solvation Model Based on Density model. Hydroxyl radical adds to the ring because the activation free energies (0.4–47.2 kJ mol −1 ) are low and also the Gibbs free energies have high negative values ((−27.4) to (−5.9) kJ mol −1 ). According to the calculations in most of cases the ortho- and para-addition is preferred in agreement with the experimental results. In these reactions hydroxycyclohexadienyl type radicals form. In a second type reaction, when loss of chlorine atom takes place, OH/Cl substitution occurs without cyclohexadienyl type intermediate. - Highlights: • Attack of • OH to aniline, phenol, fenuron, monuron, diuron was studied by DFT. • Ortho-para directing is suggested with –NH 2 , –OH and –NHCON(CH 3 ) 2 groups. • • OH addition to the ring gives hydroxycyclohexadienyl radical. • Attack at C-Cl leads to • OH/Cl substitution without cyclohexadienyl intermediate.

  15. Fuel salt and container material studies for MOSART transforming system

    Energy Technology Data Exchange (ETDEWEB)

    Ignatiev, V.; Feynberg, O.; Merzlyakov, A.; Surenkov, A.; Zagnitko, A. [National Research Center, Kurchatov Institute, Moscow (Russian Federation); Afonichkin, V.; Bovet, A.; Khokhlov, V. [Institute of High Temperature Electrochemisty, Ekaterinburg (Russian Federation); Subbotin, V.; Gordeev, M.; Panov, A.; Toropov, A. [Institute of Technical Physics, Snezhinsk (Russian Federation)

    2013-07-01

    A study is under progress to examine the feasibility of single stream Molten Salt Actinide Recycling and Transmuting system without and with Th support (MOSART) fuelled with different compositions of actinide tri-fluorides (AnF{sub 3}) from used LWR fuel. New fast-spectrum design options with homogeneous core and fuel salts with high enough solubility for AnF{sub 3} are being examined because of new goals. The flexibility of single fluid MOSART concept with Th support is underlined, particularly, possibility of its operation in self-sustainable mode (Conversion Ratio: CR=1) using different loadings and make up. The paper summarizes the most current status of fuel salt and container material data for the MOSART concept received within ISTC-3749 and ROSATOM-MARS projects. Key physical and chemical properties of various fluoride fuel salts are reported. The issues like salt purification, the electroreduction of U(IV) to U(III) in LiF-ThF{sub 4} and the electroreduction of Yb(III) to Yb(II) in LiF-NaF are detailed.

  16. A phase-field study of the physical concepts of martensitic transformations in steels

    International Nuclear Information System (INIS)

    Yeddu, Hemantha Kumar; Borgenstam, Annika; Hedström, Peter; Ågren, John

    2012-01-01

    Highlights: ► Critical driving forces associated with martensitic transformation are estimated. ► Plastic relaxation rate affects the transformation and microstructure evolution. ► Low relaxation rate promotes multi-domained martensitic microstructure. ► High relaxation rate promotes growth of a single martensite domain. ► The model predicts the final habit plane of martensite to be (−2 1 1) γ . - Abstract: A 3D elastoplastic phase-field model is employed to study various driving forces associated with martensitic transformations, plastic deformation behavior as well as the habit plane concept. Usage of thermodynamic parameters corresponding to Fe–0.3%C alloy in conjunction with anisotropic physical parameters of steels as the simulation parameters have yielded the results in reasonable agreement with experimental observations. From the simulation results, it is concluded that there exist three critical driving forces that control the transformation and also that the plastic deformation behavior of the material greatly affects the transformation. The model predicts the initial habit plane of the first infinitesimal unit of martensite as (−1 1 1). The model also predicts that, as the transformation progresses, the above mentioned martensite domain rotates and finally orients along the new habit plane of (−2 1 1).

  17. Study on sampling of continuous linear system based on generalized Fourier transform

    Science.gov (United States)

    Li, Huiguang

    2003-09-01

    In the research of signal and system, the signal's spectrum and the system's frequency characteristic can be discussed through Fourier Transform (FT) and Laplace Transform (LT). However, some singular signals such as impulse function and signum signal don't satisfy Riemann integration and Lebesgue integration. They are called generalized functions in Maths. This paper will introduce a new definition -- Generalized Fourier Transform (GFT) and will discuss generalized function, Fourier Transform and Laplace Transform under a unified frame. When the continuous linear system is sampled, this paper will propose a new method to judge whether the spectrum will overlap after generalized Fourier transform (GFT). Causal and non-causal systems are studied, and sampling method to maintain system's dynamic performance is presented. The results can be used on ordinary sampling and non-Nyquist sampling. The results also have practical meaning on research of "discretization of continuous linear system" and "non-Nyquist sampling of signal and system." Particularly, condition for ensuring controllability and observability of MIMO continuous systems in references 13 and 14 is just an applicable example of this paper.

  18. Studying the complexity of change: toward an analytical framework for understanding deliberate social-ecological transformations

    Directory of Open Access Journals (Sweden)

    Michele-Lee Moore

    2014-12-01

    Full Text Available Faced with numerous seemingly intractable social and environmental challenges, many scholars and practitioners are increasingly interested in understanding how to actively engage and transform the existing systems holding such problems in place. Although a variety of analytical models have emerged in recent years, most emphasize either the social or ecological elements of such transformations rather than their coupled nature. To address this, first we have presented a definition of the core elements of a social-ecological system (SES that could potentially be altered in a transformation. Second, we drew on insights about transformation from three branches of literature focused on radical change, i.e., social movements, socio-technical transitions, and social innovation, and gave consideration to the similarities and differences with the current studies by resilience scholars. Drawing on these findings, we have proposed a framework that outlines the process and phases of transformative change in an SES. Future research will be able to utilize the framework as a tool for analyzing the alteration of social-ecological feedbacks, identifying critical barriers and leverage points and assessing the outcome of social-ecological transformations.

  19. Studies on the coupling transformer to improve the performance of microwave ion source.

    Science.gov (United States)

    Misra, Anuraag; Pandit, V S

    2014-06-01

    A 2.45 GHz microwave ion source has been developed and installed at the Variable Energy Cyclotron Centre to produce high intensity proton beam. It is operational and has already produced more than 12 mA of proton beam with just 350 W of microwave power. In order to optimize the coupling of microwave power to the plasma, a maximally flat matching transformer has been used. In this paper, we first describe an analytical method to design the matching transformer and then present the results of rigorous simulation performed using ANSYS HFSS code to understand the effect of different parameters on the transformed impedance and reflection and transmission coefficients. Based on the simulation results, we have chosen two different coupling transformers which are double ridged waveguides with ridge widths of 24 mm and 48 mm. We have fabricated these transformers and performed experiments to study the influence of these transformers on the coupling of microwave to plasma and extracted beam current from the ion source.

  20. Knowledge Transmission versus Social Transformation: A Critical Analysis of Purpose in Elementary Social Studies Methods Textbooks

    Science.gov (United States)

    Butler, Brandon M.; Suh, Yonghee; Scott, Wendy

    2015-01-01

    In this article, the authors investigate the extent to which 9 elementary social studies methods textbooks present the purpose of teaching and learning social studies. Using Stanley's three perspectives of teaching social studies for knowledge transmission, method of intelligence, and social transformation; we analyze how these texts prepare…

  1. Transformation of tourist landscapes in mountain areas: Case studies from Slovakia

    Directory of Open Access Journals (Sweden)

    Branislav Chrenka

    2011-11-01

    Full Text Available After two decades of deregulated free market economy the post-socialist rural mountain areas are being unprecedently commodified. Landscapes of tourist consumption with specific behaviour patterns are produced and reproduced. The paper explores how landscapes are transformed due to massive investments into tourist infrastructure with questionable impacts on quality of life and environmental sustainability. Power relations and related production of space are analysed in three case studies in the selected mountain areas in Slovakia. First, the Oščadnica case study reflects on rural landscape rapidly transformed by massive ski resort development and deforestation. Second, the Tále golf course development case study describes commodification and gentrification processes in Central Slovakia. Third, the High Tatras case study explores how power structures push on the transformation of the oldest and most visited National Park in Slovakia.

  2. Source study of the Jan Mayen transform fault strike-slip earthquakes

    Science.gov (United States)

    Rodríguez-Pérez, Q.; Ottemöller, L.

    2014-07-01

    Seismic source parameters of oceanic transform zone earthquakes have been relatively poorly studied. Previous studies showed that this type of earthquakes has unique characteristics such as not only the relatively common occurrence of slow events with weak seismic radiation at high frequencies but also the occurrence of some events that have high apparent stress indicating strong high frequency radiation. We studied 5 strike-slip earthquakes in the Jan Mayen fracture zone with magnitudes in the range of 5.9 centroid time delay compared to other oceanic transform fault earthquakes.

  3. Transforming Language Ideologies through Action Research: A Case Study of Bilingual Science Learning

    Science.gov (United States)

    Yang, Eunah

    2012-01-01

    This qualitative case study explored a third grade bilingual teacher's transformative language ideologies through participating in a collaborative action research project. By merging language ideologies theory, Cultural Historical Activity Theory (CHAT), and action research, I was able to identify the analytic focus of this study. I analyzed…

  4. The Transformation of a Private University's School of Nursing, 1999-2009: An Historical Case Study

    Science.gov (United States)

    Selick, Sandra A.

    2014-01-01

    The purpose of this study was to examine the transformation of the School of Nursing at a private university in a Middle Atlantic state during the years 1999 to 2009. The secondary purpose of this study was to determine the leadership style of the Director of the School of Nursing at this private university in a Middle Atlantic state that led this…

  5. Influence of Transformational Leadership Style on Decision-Making Style and Technology Readiness: A Correlation Study

    Science.gov (United States)

    Mueller, Crystal A.

    2009-01-01

    The research addressed the problem of technology initiatives failing to meet organizational objectives. The purpose of the quantitative correlation study was to determine the relationship between transformational leadership styles, decision-making styles, and technology readiness. The findings of the study answered research questions in three…

  6. Educating Preservice School Librarians to Lead: A Study of Self-Perceived Transformational Leadership Behaviors

    Science.gov (United States)

    Smith, Daniella

    2011-01-01

    The purpose of this study was to determine the factors that impacted the level of self-perceived transformational leadership potential in preservice school librarians who participated in a master's degree program in library and information studies focusing on leadership development. A mixed-method concurrent triangulation research design was…

  7. Exploring Attitude Transformation: A Grounded Theory Study of Romanian Teachers of Roma Students

    Science.gov (United States)

    Jones, Laura Estella

    2016-01-01

    The purpose of this systematic grounded theory study was to explore the process of change in teacher attitudes toward including Roma ("Gypsy") students in non-segregated schools in Romania. The theories guiding this study included Mezirow's (1991, 2000) theory of transformation, Gay's (2002, 2013) theory of culturally responsive…

  8. The Reverberations of a Graduate Study Abroad Course in India: Transformational Journeys

    Science.gov (United States)

    Anderson Sathe, Laurie; Geisler, Carol C.

    2017-01-01

    Faculty in a transdisciplinary graduate program in holistic health studies, which is grounded in transformational learning led a study abroad course in India. The focus of the course is on perspectives of health and healing in India, including an understanding of Yoga, meditation, Ayurvedic medicine, and Tibetan medicine. The purpose of this…

  9. Studies of transformational leadership: evaluating two alternative models of trust and satisfaction.

    Science.gov (United States)

    Yang, Yi-Feng

    2014-06-01

    This study evaluates the influence of leadership style and employee trust in their leaders on job satisfaction. 341 personnel (164 men, 177 women; M age = 33.5 yr., SD = 5.1) from four large insurance companies in Taiwan completed the transformational leadership behavior inventory, the leadership trust scale and a short version of the Minnesota (Job) Satisfaction Questionnaire. A bootstrapping mediation and structural equation modeling revealed that the effect of transformational leadership on job satisfaction was mediated by leadership trust. This study highlights the importance of leadership trust in leadership-satisfaction relationships, and provides managers with practical ways to enhance job satisfaction.

  10. Electron backscatter diffraction studies of focused ion beam induced phase transformation in cobalt

    Energy Technology Data Exchange (ETDEWEB)

    Jones, H.G., E-mail: helen.jones@npl.co.uk [National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW (United Kingdom); Day, A.P. [Aunt Daisy Scientific Ltd, Claremont House, High St, Lydney GL15 5DX (United Kingdom); Cox, D.C. [National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW (United Kingdom); Advanced Technology Institute, University of Surrey, Guildford GU2 7XH (United Kingdom)

    2016-10-15

    A focused ion beam microscope was used to induce cubic to hexagonal phase transformation in a cobalt alloy, of similar composition to that of the binder phase in a hardmetal, in a controlled manner at 0°, 45° and 80° ion incident angles. The cobalt had an average grain size of ~ 20 μm, allowing multiple orientations to be studied, exposed to a range of doses between 6 × 10{sup 7} and 2 × 10{sup 10} ions/μm{sup 2}. Electron backscatter diffraction (EBSD) was used to determine the original and induced phase orientations, and area fractions, before and after the ion beam exposure. On average, less phase transformation was observed at higher incident angles and after lower ion doses. However there was an orientation effect where grains with an orientation close to (111) planes were most susceptible to phase transformation, and (101) the least, where grains partially and fully transformed at varying ion doses. - Highlights: •Ion-induced phase change in FCC cobalt was observed at multiple incidence angles. •EBSD was used to study the relationship between grain orientation and transformation. •Custom software analysed ion dose and phase change with respect to grain orientation. •A predictive capability of ion-induced phase change in cobalt was enabled.

  11. Spatially resolved Raman spectroscopy study of transformed zones in magnesia-partially-stabilized zirconia

    International Nuclear Information System (INIS)

    Davskardt, R.H.; Veirs, D.K.; Ritchie, R.O.

    1989-01-01

    Raman vibrational spectroscopy provides an effective phase characterization technique in materials systems containing particle dispersions of the tetragonal and monoclinic polymorphs of zirconia, each of which yields a unique Raman spectrum. An investigation is reported to assess a novel, spatially resolved Raman spectroscopy system in the study of transformed zones surrounding cracks in partially stabilized MgO-ZrO 2 (PSZ). The experimental arrangement uses an imaging (two-dimensional) photomultiplier tube to produce a one-dimensional Raman profile of phase compositions along a slitlike laser beam without translation of either the sample or the laser beam and without scanning the spectrometer. Results from phase characterization studies of the size, frontal morphology, and extent of transformation of transformation zones surrounding cracks produced under monotonic and cyclic loading conditions are presented

  12. Malignant transformation of oral leukoplakia: a retrospective cohort study of 218 Chinese patients

    International Nuclear Information System (INIS)

    Liu, Wei; Wang, Yu-Feng; Zhou, Hai-Wei; Shi, Peng; Zhou, Zeng-Tong; Tang, Guo-Yao

    2010-01-01

    Oral leukoplakia (OL) is the best-known potentially malignant disorder. A new binary system to grade dysplasia was proposed by WHO, but the biological significance in predicting malignant transformation risk is unknown. The objective of this study is to estimate the rate of malignant transformation in a long-term follow-up cohort, explore the usefulness of the new binary system of grading dysplasia and identify significant risk factors of OL malignant transformation in China. A total of 218 patients with clinical and histopathologic diagnosis of OL were retrospectively reviewed. They were selected among all archived files at the Department of Oral Mucosal Diseases, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine. The mean follow-up period was 5.3 years. Among 218 cases, 39 (17.9%) OL patients developed oral cancer, with a mean duration of 5.2 years. Cox regression analysis revealed that dysplasia was an independent risk factor for OL malignant transformation, but age, gender, lesion site, diet habit, smoking and ethanol intake were not risk factors. High-risk dysplastic OL was associated with a 4.57-fold (95% confidence interval, 2.36-8.84; P < 0.001) increased risk of malignant transformation, compared with low-risk dysplasia. Consistent with this result, high-risk dysplastic OL had signicantly higher malignant incidence than low-risk dysplasia, particularly during the first 2-3 years of follow-up, by Kaplan-Meier analysis (Log-rank test, P < 0.001). The new binary system's function in predicting OL malignant transformation risk was investigated in this survey. The utilization of high-risk dysplasia as a significant indicator for evaluating malignant transformation risk in patients with OL was suggested, which may be helpful to guide treatment selection in clinical practice

  13. Dynamic Diffraction Studies on the Crystallization, Phase Transformation, and Activation Energies in Anodized Titania Nanotubes

    Directory of Open Access Journals (Sweden)

    Hani Albetran

    2018-02-01

    Full Text Available The influence of calcination time on the phase transformation and crystallization kinetics of anodized titania nanotube arrays was studied using in-situ isothermal and non-isothermal synchrotron radiation diffraction from room temperature to 900 °C. Anatase first crystallized at 400 °C, while rutile crystallized at 550 °C. Isothermal heating of the anodized titania nanotubes by an increase in the calcination time at 400, 450, 500, 550, 600, and 650 °C resulted in a slight reduction in anatase abundance, but an increase in the abundance of rutile because of an anatase-to-rutile transformation. The Avrami equation was used to model the titania crystallization mechanism and the Arrhenius equation was used to estimate the activation energies of the titania phase transformation. Activation energies of 22 (10 kJ/mol for the titanium-to-anatase transformation, and 207 (17 kJ/mol for the anatase-to-rutile transformation were estimated.

  14. Evaluating Pillar Industry's Transformation Capability: A Case Study of Two Chinese Steel-Based Cities.

    Science.gov (United States)

    Li, Zhidong; Marinova, Dora; Guo, Xiumei; Gao, Yuan

    2015-01-01

    Many steel-based cities in China were established between the 1950s and 1960s. After more than half a century of development and boom, these cities are starting to decline and industrial transformation is urgently needed. This paper focuses on evaluating the transformation capability of resource-based cities building an evaluation model. Using Text Mining and the Document Explorer technique as a way of extracting text features, the 200 most frequently used words are derived from 100 publications related to steel- and other resource-based cities. The Expert Evaluation Method (EEM) and Analytic Hierarchy Process (AHP) techniques are then applied to select 53 indicators, determine their weights and establish an index system for evaluating the transformation capability of the pillar industry of China's steel-based cities. Using real data and expert reviews, the improved Fuzzy Relation Matrix (FRM) method is applied to two case studies in China, namely Panzhihua and Daye, and the evaluation model is developed using Fuzzy Comprehensive Evaluation (FCE). The cities' abilities to carry out industrial transformation are evaluated with concerns expressed for the case of Daye. The findings have policy implications for the potential and required industrial transformation in the two selected cities and other resource-based towns.

  15. Feasibility Study for Applicability of the Wavelet Transform to Code Accuracy Quantification

    International Nuclear Information System (INIS)

    Kim, Jong Rok; Choi, Ki Yong

    2012-01-01

    A purpose of the assessment process of large thermal-hydraulic system codes is verifying their quality by comparing code predictions against experimental data. This process is essential for reliable safety analysis of nuclear power plants. Extensive experimental programs have been conducted in order to support the development and validation activities of best estimate thermal-hydraulic codes. So far, the Fast Fourier Transform Based Method (FFTBM) has been used widely for quantification of the prediction accuracy regardless of its limitation that it does not provide any time resolution for a local event. As alternative options, several time windowing methods (running average, short time Fourier transform, and etc.) can be utilized, but such time windowing methods also have a limitation of a fixed resolution. This limitation can be overcome by a wavelet transform because the resolution of the wavelet transform effectively varies in the time-frequency plane depending on choice of basic functions which are not necessarily sinusoidal. In this study, a feasibility of a new code accuracy quantification methodology using the wavelet transform is pursued

  16. Box-Cox transformation on dataset from compositional studies of archaeological potteries

    International Nuclear Information System (INIS)

    Santos, J.O.; Santana Reis, Michael; Silva, J.E.

    2017-01-01

    In archaeometric data set it was verified by statistical tests that some variables almost never follow a multivariate normal distribution using logarithmic transformation or other. This work presents a multivariate Box-Cox transformation for Mardia's and Royton's tests for a data set of fifty ceramic fragments from archaeological site Justino, Xingo, Brazil, and one clay sample collected near of the site. The samples were analyzed by instrumental neutron activation analysis, INAA. The study was made using companion to applied regression package from R software and was tested by Hotelling's T"2 statistics. (author)

  17. A biomonitoring study of genotoxic risk to workers of transformers and distribution line stations.

    Science.gov (United States)

    Celikler, Serap; Aydemir, Nilufer; Vatan, Ozgur; Kurtuldu, Sevim; Bilaloglu, Rahmi

    2009-12-01

    A cytogenetic monitoring study was carried out on a group of workers from transformer and distribution line stations in the Bursa province of Turkey, to investigate the genotoxic risk of occupational exposure to extremely low frequency electric (ELF) and magnetic fields (EMF). Cytogenetic analysis, namely chromosomal aberrations (CAs) and micronucleus (MN) tests were performed on a strictly selected group of 55 workers and compared to 17 controls. CA and MN frequencies in electrical workers appeared significantly higher than in controls (p electric transformer and distribution stations.

  18. Moessbauer study of magnetic transformation of Ni3Al-(57Co+57Fe) surface layer

    International Nuclear Information System (INIS)

    Dudas, J.; Zemcik, T.

    1975-01-01

    The results of the magnetic transformation study of the Ni 3 Al-( 57 Co+ 57 Fe) surface layer by the 57 Fe Moessbauer effect in dependence on the penetration depth of ( 57 Co+ 57 Fe) are presented. These results are discussed in terms of the magnetic polarization of the Co (and Fe) atoms and the appearance of the 'giant' magnetic moment. The critical concentration of Co+Fe impurities sufficient for transformation of the originally paramagnetic surface layer into ferromagnetic at room temperature was determined to be 1.03 at.'=.. (author)

  19. Overvoltage Protection of Large Power Transformers - A Real-Life Study Case

    DEFF Research Database (Denmark)

    Bak, Claus Leth; Einarsdottir, K. E.; Andresson, E.

    2008-01-01

    This paper demonstrates the results from a detailed study of the overvoltage protection of a particular 400/150-kV 400-MVA power transformer. The work presented here is based on a real-life power system substation design and data and initiated by Danish TSO Energinet.dk as a consequence of serious...... transformer overvoltage damage. A simulation model for the entire system consisting of overhead line, transformer, surge arrester, and earth grid has been created in PSCAD/EMTDC. The main focus has been put on the earth grid, which has been submodeled in detail in MATLAB using an electromagnetic transient...... exceeded. It is clearly illustrated that the transient performance of the earth grid plays an important role in the overall overvoltage protection system design....

  20. Study on ventilation and noise reduction in the main transformer room in indoor substation

    Directory of Open Access Journals (Sweden)

    Hu Sheng

    2016-01-01

    Full Text Available The noise emission should be considered in the ventilation and cooling design for the main transformer room of indoor substation. In this study, based on Soundplan software, effects of four common ventilation and cooling schemes on the cooling and sound insulation were compared. The research showed that the region with low noise requirement, the ventilation could be set on the outer wall or on the door of the main transformer room, while the region with high noise requirement, air inlet muffler or ventilation through the cable interlayer under the main transformer room must be used. All of the four kinds of ventilation schemes, ventilation through the cable interlayer is the best in cooling and noise reduction.

  1. How Multilevel Societal Learning Processes Facilitate Transformative Change: A Comparative Case Study Analysis on Flood Management

    Directory of Open Access Journals (Sweden)

    Claudia Pahl-Wostl

    2013-12-01

    Full Text Available Sustainable resources management requires a major transformation of existing resource governance and management systems. These have evolved over a long time under an unsustainable management paradigm, e.g., the transformation from the traditionally prevailing technocratic flood protection toward the holistic integrated flood management approach. We analyzed such transformative changes using three case studies in Europe with a long history of severe flooding: the Hungarian Tisza and the German and Dutch Rhine. A framework based on societal learning and on an evolutionary understanding of societal change was applied to identify drivers and barriers for change. Results confirmed the importance of informal learning and actor networks and their connection to formal policy processes. Enhancing a society's capacity to adapt is a long-term process that evolves over decades, and in this case, was punctuated by disastrous flood events that promoted windows of opportunity for change.

  2. Genetic transformation of Fusarium oxysporum f.sp. gladioli with Agrobacterium to study pathogenesis in Gladiolus

    Science.gov (United States)

    Fusarium rot caused by Fusarium oxysporum f.sp. gladioli (Fog) is one of the most serious diseases of Gladiolus, both in the field and in stored bulbs. In order to study the pathogenesis of this fungus, we have transformed Fog with Agrobacterium tumefaciens binary vectors containing the hygromycin B...

  3. A Correlational Study on Transformational Leadership and Resilience in Higher Education Leadership

    Science.gov (United States)

    Wasden, Shane T.

    2014-01-01

    This quantitative correlational study investigated the relationship between self-perceived transformational leadership and self-perceived resilience within the confines of higher education leadership. This dissertation is written from a professional practice doctorate (PPD) perspective. A discussion of the PPD and its components is provided along…

  4. Upper Secondary French Students, Chemical Transformations and the "Register of Models": A Cross-Sectional Study

    Science.gov (United States)

    Cokelez, Aytekin; Dumon, Alain; Taber, Keith S.

    2008-01-01

    The purpose of this study is to identify how upper secondary school French students (Grade 10-12) interpret chemical transformation with regards to the changes within molecules and atoms, and in terms of intramolecular and/or intermolecular bond breaking. In order to identify and describe the students' assimilated knowledge, four questions were…

  5. Transforming Language Ideologies through Action Research: A Case Study of Bilingual Science Learning

    Science.gov (United States)

    Yang, Eunah

    This qualitative case study explored a third grade bilingual teacher's transformative language ideologies through participating in a collaborative action research project. By merging language ideologies theory, Cultural Historical Activity Theory (CHAT), and action research, I was able to identify the analytic focus of this study. I analyzed how one teacher and I, the researcher, collaboratively reflected on classroom language practices during the video analysis meetings and focus groups. Further, I analyzed twelve videos that we coded together to see the changes in the teacher's language practices over time. My unit of analysis was the discourse practice mediated by additive language ideologies. Throughout the collaborative action research process, we both critically reflected on the classroom language use. We also developed a critical consciousness about the participatory shifts and learning of focal English Learner (EL) students. Finally, the teacher made changes to her classroom language practices. The results of this study will contribute to the literacy education research field for theoretical, methodological, and practical insights. The integration of language ideologies, CHAT, and action research can help educational practitioners, researchers, and policy makers understand the importance of transforming teachers' language ideologies in designing additive learning contexts for ELs. From a methodological perspective, the transformative language ideologies through researcher and teacher collaborated video analysis process provide a unique contribution to the language ideologies in education literature, with analytic triangulation. As a practical implication, this study suggests action research can be one of the teacher education tools to help the teachers transform language ideologies for EL education.

  6. Transformation in Higher Education: A Case Study of Successful Organization Change and Rebirth

    Science.gov (United States)

    Kirby, Janet A.

    2011-01-01

    This history and case study of the transformation of a private Catholic junior college to a branch campus of a private Catholic university system is one of successful organization change achieved through entrepreneurial leadership, resilient culture, teleological change processes, and sound business strategies. The use of the term…

  7. A Study of Transformational Change at Three Schools of Nursing Implementing Healthcare Informatics

    Science.gov (United States)

    Cornell, Revonda Leota

    2009-01-01

    The "Health Professions Education: A Bridge to Quality" (IOM, 2003) proposed strategies for higher education leaders and faculty to transform their institutions in ways that address the healthcare problems. This study provides higher education leaders and faculty with empirical data about the processes of change involved to implement the…

  8. Researching the Practice of Fostering Transformative Learning: Lessons Learned From the Study of Andragogy

    Science.gov (United States)

    Taylor, Edward W.; Laros, Anna

    2014-01-01

    This article identifies factors that have contributed to the challenges associated with the practice and research of fostering transformative learning (TL), by drawing on the work by Rachal and others in reviewing the study of andragogy--theory, research, and practice. Implications are also discussed of how scholars of TL can best respond to the…

  9. Study of cancer cell lines with Fourier transform infrared (FTIR)/vibrational absorption (VA) spectroscopy

    DEFF Research Database (Denmark)

    Uceda Otero, E. P.; Eliel, G. S. N.; Fonseca, E. J. S.

    2013-01-01

    In this work we have used Fourier transform infrared (FTIR) / vibrational absorption (VA) spectroscopy to study two cancer cell lines: the Henrietta Lacks (HeLa) human cervix carcinoma and 5637 human bladder carcinoma cell lines. Our goal is to experimentally investigate biochemical changes...

  10. Raman spectroscopy study of the nanodiamond-to-carbon onion transformation

    International Nuclear Information System (INIS)

    Cebik, Jonathan; Peerally, Filipe; Medrano, Rene; Osswald, Sebastian; McDonough, John K; Neitzel, Ioannis; Gogotsi, Yury

    2013-01-01

    Here, we present a comprehensive study analyzing early stages of the transformation of detonation nanodiamond (ND) powder to graphitic carbon onions via thermal annealing in argon atmosphere. Raman spectroscopy was employed to monitor this transformation, starting with the sp 3 -to-sp 2 conversion of the ND surface at the onset of the graphitization process. Additionally, transmission electron microscopy, x-ray diffraction, and thermogravimetric analysis were used to supplement the structural information obtained from Raman spectroscopy and allow for an accurate interpretation of the obtained Raman data. The effect of the annealing time on the transformation process was also studied to determine the kinetics of the conversion at low temperatures. The results presented in this study complement previous work on ND annealing and provide deeper insight into the nanodiamond-to-carbon onion conversion mechanism, in particular the time and size dependence. We present further evidence for the existence of a disordered sp 2 phase as an intermediate step in the transformation process. (paper)

  11. Transformative Learning of Pre-Service Teachers during Study Abroad in Reggio Emilia, Italy: A Case Study

    Science.gov (United States)

    Vatalaro, Angela; Szente, Judit; Levin, Judith

    2015-01-01

    The present paper explores the transformative learning of five pre-service teachers participating in a two-week study abroad program to Reggio Emilia, Italy. The study was conducted in order to understand how a study abroad program could contribute to pre-service teachers' content knowledge, teaching practices, and global competence. Through a…

  12. Clinicopathological Profile and Malignant Transformation in Oral Lichen Planus: A Retrospective Study

    Science.gov (United States)

    Bandyopadhyay, Alokenath; Behura, Shyam Sundar; Nishat, Roquaiya; Dash, Kailash Chandra; Bhuyan, Lipsa; Ramachandra, Sujatha

    2017-01-01

    Objectives: The aim of this study was to analyze the histopathologically diagnosed cases of oral lichen planus (OLP) in terms of age, gender, clinical variant, site, hyperpigmentation, systemic illness, grade of dysplasia, and associated malignant transformation. This study also intended to do a review of reported cases of OLP with malignant transformation. Materials and Methods: One hundred and forty-three cases of histopathologically diagnosed OLP between 2010 and 2016 were retrospectively reviewed. Demographic and clinicopathological data including malignant transformation were obtained. The data obtained were analyzed using the Statistical Package for the Social Sciences (SPSS) software for Windows version 20.0 (IBM SPSS, SPSS Inc., Chicago, IL, USA). A review of published literature on OLP with malignant transformation was also done from 1988 to 2017 and tabulated. Results: OLP in this study showed a male predilection with most of the patients in the third decade. The buccal mucosa (bilateral presentation) was the most common site (79.72%), and reticular type was the most common clinical type (79.02%) followed by erosive type (20.98%). The majority (92.31%) of cases were diagnosed with OLP without dysplasia. The rest (7.69%) of dysplastic cases were predominantly seen in the buccal mucosa of 58 years and above, female patients manifesting mainly as erosive type. Two patients (1.4%) previously diagnosed clinically and histopathologically as OLP developed oral squamous cell carcinoma. Conclusion: The present investigation revealed the predominance of OLP among middle-aged male population and the prevalence of bilateral involvement of buccal mucosa. Two of our cases showed malignant transformation over an average period of 3.5 years. The outcome of this study emphasizes the role of clinical follow-up of patients with OLP. PMID:28584781

  13. A new approach for AC loss reduction in HTS transformer using auxiliary windings, case study: 25 kA HTS current injection transformer

    Science.gov (United States)

    Heydari, Hossein; Faghihi, Faramarz; Aligholizadeh, Reza

    2008-01-01

    AC loss is one of the important parameters in HTS (high temperature superconducting) AC devices. Among the HTS AC power devices, the transformer is an essential part in the electrical power system. The AC losses in an HTS tape depend on the magnetic field. One of the techniques usually adopted to mitigate the unwanted magnetic field is using a system of coils that produce a magnetic field opposite to the incident one, reducing the total magnetic field. In this paper adding two auxiliary windings to the HTS transformer to produce this opposite magnetic field is proposed. The proper use of these auxiliary windings could reduce the leakage flux and, therefore, the AC loss. A mathematical model is used to describe the behaviour of a transformer operating with auxiliary windings, based on the theory of electromagnetic coupled circuits. The influence of the auxiliary windings on the leakage field is studied by the finite element method (FEM) and the AC loss of an HTS transformer was calculated. Also, the simulation results show that employing auxiliary windings will improve the HTS transformer efficiency.

  14. A new approach for AC loss reduction in HTS transformer using auxiliary windings, case study: 25 kA HTS current injection transformer

    International Nuclear Information System (INIS)

    Heydari, Hossein; Faghihi, Faramarz; Aligholizadeh, Reza

    2008-01-01

    AC loss is one of the important parameters in HTS (high temperature superconducting) AC devices. Among the HTS AC power devices, the transformer is an essential part in the electrical power system. The AC losses in an HTS tape depend on the magnetic field. One of the techniques usually adopted to mitigate the unwanted magnetic field is using a system of coils that produce a magnetic field opposite to the incident one, reducing the total magnetic field. In this paper adding two auxiliary windings to the HTS transformer to produce this opposite magnetic field is proposed. The proper use of these auxiliary windings could reduce the leakage flux and, therefore, the AC loss. A mathematical model is used to describe the behaviour of a transformer operating with auxiliary windings, based on the theory of electromagnetic coupled circuits. The influence of the auxiliary windings on the leakage field is studied by the finite element method (FEM) and the AC loss of an HTS transformer was calculated. Also, the simulation results show that employing auxiliary windings will improve the HTS transformer efficiency

  15. A new approach for AC loss reduction in HTS transformer using auxiliary windings, case study: 25 kA HTS current injection transformer

    Energy Technology Data Exchange (ETDEWEB)

    Heydari, Hossein; Faghihi, Faramarz; Aligholizadeh, Reza [Center of Excellence for Power System Automation and Operation, Electrical Engineering Department, Iran University of Science and Technology, Tehran (Iran, Islamic Republic of)

    2008-01-15

    AC loss is one of the important parameters in HTS (high temperature superconducting) AC devices. Among the HTS AC power devices, the transformer is an essential part in the electrical power system. The AC losses in an HTS tape depend on the magnetic field. One of the techniques usually adopted to mitigate the unwanted magnetic field is using a system of coils that produce a magnetic field opposite to the incident one, reducing the total magnetic field. In this paper adding two auxiliary windings to the HTS transformer to produce this opposite magnetic field is proposed. The proper use of these auxiliary windings could reduce the leakage flux and, therefore, the AC loss. A mathematical model is used to describe the behaviour of a transformer operating with auxiliary windings, based on the theory of electromagnetic coupled circuits. The influence of the auxiliary windings on the leakage field is studied by the finite element method (FEM) and the AC loss of an HTS transformer was calculated. Also, the simulation results show that employing auxiliary windings will improve the HTS transformer efficiency.

  16. A comparison study of Agrobacterium-mediated transformation methods for root-specific promoter analysis in soybean.

    Science.gov (United States)

    Li, Caifeng; Zhang, Haiyan; Wang, Xiurong; Liao, Hong

    2014-11-01

    Both in vitro and in vivo hairy root transformation systems could not replace whole plant transformation for promoter analysis of root-specific and low-P induced genes in soybean. An efficient genetic transformation system is crucial for promoter analysis in plants. Agrobacterium-mediated transformation is the most popular method to produce transgenic hairy roots or plants. In the present study, first, we compared the two different Agrobacterium rhizogenes-mediated hairy root transformation methods using either constitutive CaMV35S or the promoters of root-preferential genes, GmEXPB2 and GmPAP21, in soybean, and found the efficiency of in vitro hairy root transformation was significantly higher than that of in vivo transformation. We compared Agrobacterium rhizogenes-mediated hairy root and Agrobacterium tumefaciens-mediated whole plant transformation systems. The results showed that low-phosphorous (P) inducible GmEXPB2 and GmPAP21 promoters could not induce the increased expression of the GUS reporter gene under low P stress in both in vivo and in vitro transgenic hairy roots. Conversely, GUS activity of GmPAP21 promoter was significantly higher at low P than high P in whole plant transformation. Therefore, both in vitro and in vivo hairy root transformation systems could not replace whole plant transformation for promoter analysis of root-specific and low-P induced genes in soybean.

  17. Breaking new ground in the mind: an initial study of mental brittle transformation and mental rigid rotation in science experts.

    Science.gov (United States)

    Resnick, Ilyse; Shipley, Thomas F

    2013-05-01

    The current study examines the spatial skills employed in different spatial reasoning tasks, by asking how science experts who are practiced in different types of visualizations perform on different spatial tasks. Specifically, the current study examines the varieties of mental transformations. We hypothesize that there may be two broad classes of mental transformations: rigid body mental transformations and non-rigid mental transformations. We focus on the disciplines of geology and organic chemistry because different types of transformations are central to the two disciplines: While geologists and organic chemists may both confront rotation in the practice of their profession, only geologists confront brittle transformations. A new instrument was developed to measure mental brittle transformation (visualizing breaking). Geologists and organic chemists performed similarly on a measure of mental rotation, while geologists outperformed organic chemists on the mental brittle transformation test. The differential pattern of skill on the two tests for the two groups of experts suggests that mental brittle transformation and mental rotation are different spatial skills. The roles of domain general cognitive resources (attentional control, spatial working memory, and perceptual filling in) and strategy in completing mental brittle transformation are discussed. The current study illustrates how ecological and interdisciplinary approaches complement traditional cognitive science to offer a comprehensive approach to understanding the nature of spatial thinking.

  18. Simple material physics experiment for studying phase diagrams and solid state transformations in alloys

    Energy Technology Data Exchange (ETDEWEB)

    Kaur, S; Kamal, R [Punjabi Univ., Patiala (India). Dept. of Physics

    1977-09-01

    Study of phase diagram and accompanying solid state transformations is essential to determine the best possible composition, manufacturing techniques and physical properties of an alloy. A simple technique having wide applications in metallurgical industry is to study the temperature--time curve of the alloy undergoing cooling with an uniform rate. An experiment which uses this technique is described. It is widely applicable in the fields of materials science, applied solid state physics, physical metallurgy and physical chemistry.

  19. A Study of Transformational Leadership and Managerial Competencies in the Flower Agricultural Sector of Colombia

    Directory of Open Access Journals (Sweden)

    Iliana Páez

    2014-07-01

    Full Text Available Rev.esc.adm.neg A good leadership is essential for the successful development of organizations and their staff members. Transformational leadership is a contemporary focus which highlights the moral bases of leadership and which has been valued in different cultures, being associated with its efectiviness and workers´ outcomes such as satisfaction and performance. This leadership is manifested through four basic performance dimensions (idealized influence, inspiring motivation, intellectual stimulus and individual consideration and through the managerial competencies of an executive. In this case study, these dimensions and ten leadership competencies (integrity and confidence, orientation to outcomes, importance of action, perseverance, effective use of time, effective communication, high performance team formation and development, decision making, business capacity and strategic management capacity have been analyzed taking an executive sample of 16 companies from the flower agricultural sector with the Florverde seal. This seal shows care for products and compromise with companies regarding environmental affairs and social responsibility, issues which are closely related with transformational leadership. Two transformational leadership dimensions were found: idealized influence and inspiring motivation, and its most outstanding competence was confidence and integrity, key elements for the successful development of transformational leadership.

  20. Study on New Smart Transformer Terminal Unit Based on ARM and GPRS Network

    Directory of Open Access Journals (Sweden)

    Na Wu

    2013-12-01

    Full Text Available Distribution transformer is one of the most important power equipments in distribution network, whose running state exercises a great influence on the stability of the network. Transformer Terminal Unit (TTU is an effective device to monitor the running state of transformers in the distribution automation system. In this paper, we study a new smart TTU which uses ARM7 series chip as processor, equipped with ATT7022B based electric meter module and GPRS module for remote data transmission control. We focus on the corresponding hardware, software design and the measurement principle of harmonics of TTU. The new TTU can measure the electric parameters of the distribution transformer precisely. Taking advantage of the powerful ARM processor, it can analyze harmonic of the power line effectively. Due to the always-on-line feature of GPRS, TTU can achieve reliable communication with the remote terminal and the master station. Compared with other similar units, the new unit outperforms in terms of real-time, precision and reliability, which can fully meet with the high-speed development of distribution automation system.

  1. Moessbauer and TEM study of martensitic transformations in ion implanted 17/7 stainless steel

    International Nuclear Information System (INIS)

    Johnson, E.; Johansen, A.; Sarholt-Kristensen, L.; Graabaek, L.

    1986-01-01

    It has earlier been shown that implantation of antimony into austenitic stainless steels induces martensitic phase transformations γ (fcc)→α (bcc). In the present work we have investigated which mechanisms are responsible for the transformation. Samples of 17/7 steels were implanted with noble gases (Kr, Ar) or the stainless steel constituent elements (Fe, Ni, Cr). The energies were selected to give ranges ∝40 nm. The phases present after implantation and the microstructures of the implanted samples were studied by CEMS and TEM respectively. A martensitic (α) phase was found to form after implantation both with Ni, Fe and Cr, in spite of the fact that these elements have opposite tendencies for stabilization of the austenite (γ) phase. The efficiency of martensite formation is therefore mainly related to stress relief associated with secondary radiation damage. This was substantiated from the noble gas implantations, where the highest degree of transformation was observed for fluences where bubble formation occurs. The CEMS analyses show that the transformation efficiency in such cases is nearly 100%. The hyperfine parameters of the implantation induced α phase are similar to those from conventionally induced martensites. (orig.)

  2. Phase transformation during silica cluster impact on crystal silicon substrate studied by molecular dynamics simulation

    International Nuclear Information System (INIS)

    Chen Ruling; Luo Jianbin; Guo Dan; Lu Xinchun

    2008-01-01

    The process of a silica cluster impact on a crystal silicon substrate is studied by molecular dynamics simulation. At the impact loading stage, crystal silicon of the impact zone transforms to a locally ordered molten with increasing the local temperature and pressure of the impact zone. And then the transient molten forms amorphous silicon directly as the local temperature and pressure decrease at the impact unloading stage. Moreover, the phase behavior between the locally ordered molten and amorphous silicon exhibits the reversible structural transition. The transient molten contains not only lots of four-fold atom but also many three- and five-fold atoms. And the five-fold atom is similar to the mixture structure of semi-Si-II and semi-bct5-Si. The structure transformation between five- and four-fold atoms is affected by both pressure and temperature. The structure transformation between three- and four-fold atoms is affected mostly by temperature. The direct structure transformation between five- and three-fold atoms is not observed. Finally, these five- and three-fold atoms are also different from the usual five- and three-fold deficient atoms of amorphous silicon. In addition, according to the change of coordination number of atoms the impact process is divided into six stages: elastic, plastic, hysteresis, phase regressive, adhesion and cooling stages

  3. Transforming Anatomy

    OpenAIRE

    Hall, Anndee

    2017-01-01

    Abstract: Transforming Anatomy Studying historic books allows people to witness the transformation of the world right before their very eyes. The Bruxellensis Icones Anatomicae[1] by Andreas Vesalius is a vital piece of evidence in the movement from a more rudimentary understanding of the human body into the more complex and accurate development of modern anatomy. Vesalius’ research worked to both refute and confirm findings of his predecessor, the great historical Greek philosopher, Galen...

  4. Implications of male circumcision for women in Papua New Guinea: a transformational grounded theory study.

    Science.gov (United States)

    Redman-MacLaren, Michelle; Mills, Jane; Tommbe, Rachael; MacLaren, David; Speare, Rick; McBride, William J H

    2017-07-27

    Male circumcision reduces the risk of female-to-male transmission of human immunodeficiency virus (HIV) and is being explored for HIV prevention in Papua New Guinea (PNG). PNG has a concentrated HIV epidemic which is largely heterosexually transmitted. There are a diverse range of male circumcision and penile modification practices across PNG. Exploring the implications of male circumcision for women in PNG is important to inform evidence-based health policy that will result in positive, intended consequences. The transformational grounded theory study incorporated participatory action research and decolonizing methodologies. In Phase One, an existing data set from a male circumcision study of 861 male and 519 female participants was theoretically sampled and analyzed for women's understanding and experience of male circumcision. In Phase Two of the study, primary data were co-generated with 64 women in seven interpretive focus group discussions and 11 semi-structured interviews to develop a theoretical model of the processes used by women to manage the outcomes of male circumcision. In Phase Three participants assisted to refine the developing transformational grounded theory and identify actions required to improve health. Many women know a lot about male circumcision and penile modification and the consequences for themselves, their families and communities. Their ability to act on this knowledge is determined by numerous social, cultural and economic factors. A transformational grounded theory was developed with connecting categories of: Women Know a Lot, Increasing Knowledge; Increasing Options; and Acting on Choices. Properties and dimensions of each category are represented in the model, along with the intervening condition of Safety. The condition of Safety contextualises the overarching lived realty for women in PNG, enables the inclusion of men in the transformational grounded theory model, and helps to explain relationships between men and women. The

  5. A flow-through hydrothermal cell for in situ neutron diffraction studies of phase transformations

    International Nuclear Information System (INIS)

    O'Neill, Brian; Tenailleau, Christophe; Nogthai, Yung; Studer, Andrew; Brugger, Joel; Pring, Allan

    2006-01-01

    A flow-through hydrothermal cell for the in situ neutron diffraction study of crystallisation and phase transitions has been developed. It can be used for kinetic studies on materials that exhibit structural transformations under hydrothermal conditions. It is specifically designed for use on the medium-resolution powder diffractometer (MRPD) at ANSTO, Lucas Heights, Sydney. But it is planned to adapt the design for the Polaris beamline at ISIS and the new high-intensity powder diffractometer (Wombat) at the new Australian reactor Opal. The cell will operate in a flow-through mode over the temperature range from 25-300 deg. C and up to pressures of 100 bar. The first results of a successful transformation of pentlandite (Fe,Ni) 9 S 8 to violarite (Fe,Ni) 3 S 4 under mild conditions (pH∼4) at 120 deg. C and 3 bar using in situ neutron diffraction measurements are presented

  6. Gas phase ion/molecule reactions as studied by Fourier Transform Ion Cyclotron Resonance mass spectrometry

    International Nuclear Information System (INIS)

    Joergensen, S.I.

    1985-01-01

    The subject of this thesis is gas phase ion/molecule reactions as studied by Fourier Transform Ion Cyclotron Resonance (FT-ICR) mass spectrometry (chapter 2 contains a short description of this method). Three chapters are mainly concerned with mechanistic aspects of gas phase ion/molecule reactions. An equally important aspect of the thesis is the stability and reactivity of α-thio carbanions, dipole stabilized carbanions and homoenolate anions, dealt with in the other four chapters. (Auth.)

  7. Transforming a school: A case study of a Catholic school principal in Indonesia

    OpenAIRE

    Siok Fei Oei

    2015-01-01

    Transforming a struggling private Catholic Vocation al School into a well-improved school requires a lot of hard work. Improving a school allowed for no sho rt-cut to assure students’ high achievement. An outstanding school was the res ult of much hard work. The current case study shall focus on the journey of Mater Amabilis School for Training Home Economics Teachers (MA SGKP). More specifically, the paper sh all ...

  8. Analytical electron microscope study of the omega phase transformation in a zirconium-niobium alloy

    International Nuclear Information System (INIS)

    Zaluzec, N.J.

    1979-01-01

    The study of the as-quenched omega phase morphology shows that the domain size of Zr-15% Nb is on the order of 30 A. No alignment of omega domains along β directions was observed and samples having undergone thermal cycling in thin foil form, did not develop a long-period structure of alternating β and ω phases below the omega transformation temperature

  9. A comparative study of different transformer connections for railway power supply- mitigation of voltage unbalance

    DEFF Research Database (Denmark)

    Firat, Gurkan; Yang, Guangya; Ali Hussain Al-Ali, Haider

    2015-01-01

    The railway represents a large power consumer that can cause uneven loading of the phases in the high voltage grid. These unbalanced loads supplied by the utility may lead to voltage unbalance problems in the system and thereby affects the other consumers connected to the same network. It is fact...... that, voltage unbalance appears mainly as a result of unbalanced currents at the points of common coupling drawn by unevenly distributed loads. Because of a significant amount of negative sequence current injected to the system, the power system components will suffer from consequent negative effects...... such as overheating, additional losses of lines and transformers, interference with communication systems etc. This paper presents a comparative study of some transformer connections which commonly used in railway supplying AC traction loads, for voltage unbalance mitigations. Simulations for comparison...

  10. Integrated Comprehensive Care - A Case Study in Nursing Leadership and System Transformation.

    Science.gov (United States)

    Wheatley, Laura; Doyle, Winnie; Evans, Cheryl; Gosse, Carolyn; Smith, Kevin

    2017-01-01

    Calls for transformational change of our healthcare system are increasingly clear, persuasive and insistent. They resonate at all levels, with those who fund, deliver, provide and receive care, and they are rooted in a deep understanding that the system, as currently rigidly structured, most often lacks the necessary flexibility to comprehensively meet the needs of patients across the continuum of care. The St. Joseph's Health System (SJHS) Integrated Comprehensive Care (ICC) Program, which bundles care and funding across the hospital to home continuum, has reduced fragmentation of care, and it has delivered improved outcomes for patients, providers and the system. This case study explores the essential contribution of nursing leadership to this successful transformation of healthcare service delivery.

  11. Study of pollutant transport in surface boundary layer by generalized integral transform technique

    International Nuclear Information System (INIS)

    Guerrero, Jesus S.P.; Heilbron Filho, Paulo F.L.; Pimentel, Luiz C.G.; Cataldi, Marcio

    2001-01-01

    A theoretical study was developed to obtain solutions of the atmospheric diffusion equation for various point source, considering radioactive decay and axial diffusion, under neutral atmospheric conditions. It was used an algebraic turbulence model available in the literature, based on Monin-Obukhov similarity theory, for the representation of the turbulent transport in the vertical direction, in the longitudinal directions was considered a constant mass eddy diffusivity . The bi-dimensional transient partial differential equation, representative of the physical phenomena, was transformed into a coupled one-dimensional transient equation system by applying the Generalized Integral Transform Technique. The coupled system was solved numerically using a subroutine based in the lines method. In order to evaluate the computational algorithm were analyzed some representative physical situations. (author)

  12. The relationship between transformational leadership and work engagement in governmental hospitals nurses: a survey study.

    Science.gov (United States)

    Hayati, Davood; Charkhabi, Morteza; Naami, Abdolzahra

    2014-01-14

    The aim of this study was to determine the effects of transformational leadership and its components on work engagement among hospital nurses. There are a few set of researches that have focused on the effects of transformational leadership on work engagement in nurses. A descriptive, correlational, cross-sectional design was used. In this study, 240 nurses have been chosen by stratified random sampling method which filled related self-reported scales include multifactor leadership questionnaire (MLQ) and work engagement scale. Data analysis has been exerted according to the statistical method of simple and multiple correlation coefficients. Findings indicated that the effect of this type of leadership on work engagement and its facets is positive and significant. In addition, the research illustrates that transformational leaders transfer their enthusiasm and high power to their subordinates by the way of modeling. This manner can increase the power as a component of work engagement in workers. Idealized influence among these leaders can result in forming a specific belief among employees toward those leaders and leaders can easily transmit their inspirational motivation to them. Consequently, it leads to make a positive vision by which, and by setting high standards, challenges the employees and establishes zeal along with optimism for attaining success in works. regarding to the results we will expand leadership and work engagement literature in hospital nurses. Also, we conclude with theoretical and practical implications and propose a clear horizon for future researches.

  13. Study of the mechanism of radiation-chemical transformations in rubber-resinous materials

    International Nuclear Information System (INIS)

    Sharova, L.B.; Astakhova, L.G. Trufanova, N.D.; Persinen, A.A.; Vasil'ev, I.A.

    1993-01-01

    Materials based on butadiene-nitrile rubbers reinforced by phenol-formaldehyde resins presently find wide application as reliable heat-insulating coatings for various metallic constructions and are utilized under exposure to ionizing radiation. In this connection, when estimating the assured lifetime of heat-insulating coatings, it is necessary to take into account the character and degree of their radiation-chemical transformations. The aim of the present work was to study the radiation-chemical transformations of materials based on a composite of butadiene-nitrile rubber and phenol-formaldehyde resin. The investigations were carried out on model materials S-O, S-25, S-100, S-130, and S-150 based on the SKN-40M rubber with a varied content of SF-010A brand phenol-formaldehyde resin, the content of which in parts by weight per 100 parts by weight of rubber is indicated in the specifications of the materials. The possible directions of the radiation-chemical transformations in the rubber-resinous vulcanizates were studied by the method of disrupted total internal reflection (MDTIR) IR spectroscopy

  14. Classical Optical Transforms Studied in the Context of Quantum Optics via the Route of Developing Dirac's Symbolic Method

    Science.gov (United States)

    Fan, Hong-Yi; Lu, Hai-Liang

    Via the route of developing Dirac's symbolic method and following Dirac's assertion: "⋯ for a quantum dynamic system that has a classical analogue, unitary transformation in the quantum theory is the analogue of contact transformation in the classical theory", we find the generalized Fresnel operator (GFO) corresponding to the generalized Fresnel transform (GFT) in classical optics. We derive GFO's normal product form and its canonical coherent state representation and find that GFO is the loyal representation of symplectic group multiplication rule. We show that GFT is just the transformation matrix element of GFO in the coordinate representation such that two successive GFTs is still a GFT. The ABCD rule of the Gaussian beam propagation is directly demonstrated in quantum optics. With the aid of entangled state representation the entangled Fresnel transform is proposed; new eigenfunctions of the complex fractional Fourier transform and fractional Hankel transform are obtained; the two-variable Hermite eigenmodes of light propagation are used in studying the Talbot effect in quadratic-index media; the complex wavelet transform and the condition of mother wavelet are studied in the context of quantum optics too. Moreover, quantum optical version of classical z-transforms is obtained on the basis of the eigenvector of creation operator. Throughout our discussions, the coherent state, squeezing operators and the technique of integration within an ordered product (IWOP) of operators are fully used.

  15. Comparative study on γ energy spectrum denoise by fourier and wavelet transforms

    International Nuclear Information System (INIS)

    Shi Dongsheng; Di Yuming; Zhou Chunlin

    2007-01-01

    This paper introduces the basic principle of wavelet and Fourier transforms, applies wavelet transform method to denoise γ energy spectrum of 60 Co and compares it with Fourier transform method. The result of simulation with MATLAB software tool showed that as compared with traditional Fourier transform, wavelet transform has comparatively higher accuracy for γ energy spectrum denoising and is more feasible to γ energy spectrum denoising. (authors)

  16. A case study about the transformation of a traditional carrier in a logistic provider

    Directory of Open Access Journals (Sweden)

    Gabriel Sperandio Milan

    2013-11-01

    Full Text Available Logistics operation outsourcing has become a regular practice for many companies strategy. As result, the use of specialized services provided by logistic operators appears as a way to increase company’s competitiveness. In order to respond to this need and add value to services offered, many cargo transport companies have changed their business to logistic operators. Thus, this article presents an analysis related to the organization, adaptation and evolution of a traditional cargo transport company to become a logistic operator. A qualitative-exploratory methodology, implemented by means a single case study, was used to develop this research. To data collection, in depth individual interviews were done, with a semi-structured approached. In addition, data were used from direct observation and documental research. The techniques used to analyze the results are understood by content analysis. As result of the transformation process, the organization increased its competitiveness, by value aggregation to its services and looking for long term relationship with its customers. Also, optimization of available and existing resources and quality improvement of provided services were perceived by company during the transformation process. The company transformation into a logistic operator reflected in greater credibility and expansion of the services offered, resulting in billing and profitability increase and a differential against the competitors.

  17. Study of transformation behavior in a Ti-4.4 Ta-1.9 Nb alloy

    International Nuclear Information System (INIS)

    Mythili, R.; Paul, V. Thomas; Saroja, S.; Vijayalakshmi, M.; Raghunathan, V.S.

    2005-01-01

    An alloy of composition Ti-4.4 wt.% Ta-1.9 wt.% Nb is being developed as a structural material for corrosion applications, as titanium and its alloys possess excellent corrosion resistance in many oxidizing media. The primary physical metallurgy database for the Ti-4.4 wt.% Ta-1.9 wt.% Nb alloy is being presented for the first time. Determination of the β transus, M s temperature and classification of the alloy have been carried out, employing a variety of microscopy techniques, X-ray diffraction (XRD), micro-hardness and differential scanning calorimetry (DSC). The β transition temperature or β transus determined using different experimental techniques was found to agree very well with evaluations based on empirical calculations. Based on chemistry and observed room temperature microstructure, the alloy has been classified as an α + β titanium alloy. The high temperature β transforms to either α' or α + β by a martensitic or Widmanstatten transformation. The mechanisms of transformation of β under different conditions and characteristics of different types of α have been studied and discussed in this paper

  18. A Study of the Value Added by Transformational Leadership Practices to Teachers' Job Satisfaction and Organizational Commitment

    Science.gov (United States)

    Kieres, Katherine H.; Gutmore, Daniel

    2014-01-01

    Based on Bass and Riggio's (2006) Augmentation Model of Transactional and Transformational Leadership, this quantitative study sought to identify the amount of variance in teacher job satisfaction and organizational commitment that can be explained by principals' transformational leadership behaviors, above and beyond the influence of…

  19. Sustainable housing transformations : The housing association as a change agent for environmental innovation and social regeneration - Two case studies

    NARCIS (Netherlands)

    Hal, van J.D.M. (Anke); Femenías, P.

    2009-01-01

    The starting point for this study is the central role of the housing association in sustainable transformations of existing post-war housing stocks in Europe. The paper explores the role of the housing association to drive and support transformation processes where the aim is to address both

  20. Study of Dielectric Breakdown Performance of Transformer Oil Based Magnetic Nanofluids

    Directory of Open Access Journals (Sweden)

    Yuzhen Lv

    2017-07-01

    Full Text Available Research on the transformer oil-based nanofluids (NFs has been raised expeditiously over the past decade. Although, there is discrepancy in the stated results and inadequate understanding of the mechanisms of improvement of dielectric nanofluids, these nanofluids have emerged as a potential substitute of mineral oils as insulating and heat removal fluids for high voltage equipment. The transformer oil (TO based magnetic fluids (ferrofluids may be regarded as the posterity insulation fluids as they propose inspiring unique prospectus to improve dielectric breakdown strength, as well as heat transfer efficiency, as compared to pure transformer oils. In this work, transformer oil-based magnetic nanofluids (MNFs are prepared by dispersal of Fe3O4 nanoparticles (MNPs into mineral oil as base oil, with various NPs loading from 5 to 80% w/v. The lightning impulse breakdown voltages (BDV measurement was conducted in accordance with IEC 60897 by using needle to sphere electrodes geometry. The test results showed that dispersion of magnetic NPs may improve the insulation strength of MO. With the increment of NPs concentrations, the positive lightning impulse (LI breakdown strength of TO is first raised, up to the highest value at 40% loading, and then tends to decrease at higher concentrations. The outcomes of negative LI breakdown showed that BDV of MNFs, with numerous loadings, were inferior to the breakdown strength of pure MO. The 40% concentration of nanoparticles (optimum concentration was selected, and positive and negative LI breakdown strength was also further studied at different sizes (10 nm, 20 nm, 30 nm and 40 nm of NPs and different electrode gap distances. Augmentation in the BDV of the ferrofluids (FFs is primarily because of dielectric and magnetic features of Fe3O4 nanoaprticles, which act as electron scavengers and decrease the rate of free electrons produced in the ionization process. Research challenges and technical difficulties

  1. The Idea of Conformation in the Study of Systemic Socio-Economic Transformations

    Directory of Open Access Journals (Sweden)

    Olga Valentinovna Brizhak

    2016-12-01

    Full Text Available The author shows the idea of conformation at studying the issues of intracorporate structure, corporate capital and economic (productive relations in the context of specific systemic socio-economic transformations. The dynamism and depth of current changes makes reflect on their nature, their objective conditionality, their dependence on existing factors. The problems of systemic market reforms are projected to private transformations. They relate both to individual economic entities (firms, companies, corporations, and to individual regions and territories of the national economy. In such conditions the aims of economic system development are changing and being corrected, and the possibilities are being reestimated. In the process of reforming the Russian economy some of the borrowed elements were rejected as inadequate and socially unacceptable. The other part was modified and embedded in public life in the course of implementation, so that they often served the opposite purposes in comparison with those for which they were borrowed. The article reveals the mission of conformation as a seamless integration of this process into the context of systemic socio-economic reforms, ensuring the necessary proportionality of transformations, the prevention of arousing gaps that threaten the sustainable movement in the corporate sector and systemic organization of economic relations at the intra-corporate level. Core development of contradictions, sprouts of post-market relations, components of the traditional capitalist market organization in terms of socio-economic transformation of Russia have impact on the economic behavior of corporations and on the specifics of intracorporate relations and interests. The corporation’s behavior is always focused on the specifics of domestic relations, the stability of legal and political system, property rights protection, preservation of national culture, etc. The author carries out the present research on the

  2. Levofloxacin oxidation by ozone and hydroxyl radicals: kinetic study, transformation products and toxicity.

    Science.gov (United States)

    Hamdi El Najjar, Nasma; Touffet, Arnaud; Deborde, Marie; Journel, Romain; Leitner, Nathalie Karpel Vel

    2013-10-01

    This work was carried out to investigate the fate of the antibiotic levofloxacin upon oxidation with ozone and hydroxyl radicals. A kinetic study was conducted at 20 °C for each oxidant. Ozonation experiments were performed using a competitive kinetic method with carbamazepin as competitor. Significant levofloxacin removal was observed during ozonation and a rate constant value of 6.0×10(4) M(-1) s(-1) was obtained at pH 7.2. An H2O2/UV system was used for the formation of hydroxyl radicals HO. The rate constant of HO was determined in the presence of a high H2O2 concentration. The kinetic expressions yielded a [Formula: see text] value of 4.5×10(9) M(-1) s(-1) at pH 6.0 and 5.2×10(9) M(-1) s(-1) at pH 7.2. These results were used to develop a model to predict the efficacy of the ozonation process and pharmaceutical removal was estimated under different ozonation conditions (i.e. oxidant concentrations and contact times). The results showed that levofloxacin was completely degraded by molecular ozone during ozonation of water and that hydroxyl radicals had no effect in real waters conditions. Moreover, LC/MS/MS and toxicity assays using Lumistox test were performed to identify ozonation transformation products. Under these conditions, four transformation products were observed and their chemical structures were proposed. The results showed an increase in toxicity during ozonation, even after degradation of all of the observed transformation products. The formation of other transformation products not identified under our experimental conditions could be responsible for the observed toxicity. These products might be ozone-resistant and more toxic to Vibrio fisheri than levofloxacin. Copyright © 2013 Elsevier Ltd. All rights reserved.

  3. Quasiparticle relaxation in Heavy Fermions studied using Inverse Fourier Transform of optical conductivity

    International Nuclear Information System (INIS)

    Dordevic, S.V.

    2012-01-01

    Inverse Fourier Transform of optical conductivity is used for studies of quasiparticle relaxation in Heavy Fermions in time domain. We demonstrate the usefulness of the procedure on model spectra and then use it to study quasiparticle relaxation in two Heavy Fermions YbFe 4 Sb 12 and CeRu 4 Sb 12 . Optical conductivity in time domain reveals details of quasiparticle relaxation close to the Fermi level, not readily accessible from the spectra in the frequency domain. In particular, we find that the relaxation of heavy quasiparticles does not start instantaneously, but typically after a few hundred femto-seconds.

  4. Multistep translation and cultural adaptation of the Penn acoustic neuroma quality-of-life scale for German-speaking patients.

    Science.gov (United States)

    Kristin, Julia; Glaas, Marcel Fabian; Stenin, Igor; Albrecht, Angelika; Klenzner, Thomas; Schipper, Jörg; Eysel-Gosepath, Katrin

    2017-11-01

    Monitoring the health-related quality of life (HRQOL) for patients with vestibular schwannoma (VS) has garnered increasing interest. In German-speaking countries, there is no disease-specific questionnaire available similar to the "Penn Acoustic Neuroma Quality-of-life Scale" (PANQOL). We translated the PANQOL for German-speaking patients based on a multistep protocol that included not only a forward-backward translation but also linguistic and sociocultural adaptations. The process consists of translation, synthesis, back translation, review by an expert committee, administration of the prefinal version to our patients, submission and appraisal of all written documents by our research team. The required multidisciplinary team for translation comprised head and neck surgeons, language professionals (German and English), a professional translator, and bilingual participants. A total of 123 patients with VS underwent microsurgical procedures via different approaches at our clinic between January 2007 and January 2017. Among these, 72 patients who underwent the translabyrinthine approach participated in the testing of the German-translated PANQOL. The first German version of the PANQOL questionnaire was created by a multistep translation process. The responses indicate that the questionnaire is simple to administer and applicable to our patients. The use of a multistep process to translate quality-of-life questionnaires is complex and time-consuming. However, this process was performed properly and resulted in a version of the PANQOL for assessing the quality of life of German-speaking patients with VS.

  5. STUDY REGARDING EFFICIENCY OF INDUCED GENETIC TRANSFORMATION IN BACILLUS LICHENIFORMIS WITH PLASMID DNA

    Directory of Open Access Journals (Sweden)

    T. VINTILĂ

    2007-05-01

    Full Text Available A strain of Bacillus licheniformis was subject to genetic transformation with plasmid vectors (pLC1 and pNC61, using electroporation technique, protoplast transformation and bivalent cations (CaCl2 mediated transformation. In the case of transformation by electroporation of Bacillus licheniformis B40, the highest number of transformed colonies (3 were obtained only after a 1,79 KV electric shock, for 2,2 milliseconds. Using this transformation technique we have obtained six kanamycin resistant transformants. The frequency of Bacillus licheniformis B40 protoplasts transformation using pLC1 and pNC61 plasmid vectors is approximately 10% (TF = 10%. As a result of pLC1 plasmid integration in Bacillus licheniformis protoplasts, six kanamycin resistant transformants were obtained. The pNC61 plasmid, which confers trimethoprim resistance, does not integrate in receiver cells by protoplast transformation. The direct genetic transformation in the presence of bivalent cations (CaCl2, mediated by pLC1 and pNC61 plasmid vectors, produce a low transformation frequency. Using this technique, we have obtained three trimethoprim resistant colonies and four kanamycin resistant colonies. The chemical way of transformation is the only technique, which realizes the integration of pNC61 in B. licheniformis B40 cells.

  6. Transformation of AgCl nanoparticles in a sewer system — A field study

    Energy Technology Data Exchange (ETDEWEB)

    Kaegi, Ralf, E-mail: ralf.kaegi@eawag.ch [Eawag, Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, 8600 Dübendorf (Switzerland); Voegelin, Andreas; Sinnet, Brian [Eawag, Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, 8600 Dübendorf (Switzerland); Zuleeg, Steffen [KUSTER + HAGER Group, Oberstrasse 222, 9014 St. Gallen (Switzerland); Siegrist, Hansruedi [Eawag, Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, 8600 Dübendorf (Switzerland); Burkhardt, Michael [HSR University of Applied Sciences, Institute of Environmental and Process Engineering (UMTEC), Oberseestrasse 10, 8640 Rapperswil (Switzerland)

    2015-12-01

    Silver nanoparticles (Ag-NP) are increasingly used in consumer products and their release during the use phase may negatively affect aquatic ecosystems. Research efforts, so far, have mainly addressed the application and use of metallic Ag(0)-NP. However, as shown by recent studies on the release of Ag from textiles, other forms of Ag, especially silver chloride (AgCl), are released in much larger quantities than metallic Ag(0). In this field study, we report the release of AgCl-NP from a point source (industrial laundry that applied AgCl-NP during a piloting phase over a period of several months to protect textiles from bacterial regrowth) to the public sewer system and investigate the transformation of Ag during its transport in the sewer system and in the municipal wastewater treatment plant (WWTP). During the study period, the laundry discharged ~ 85 g of Ag per day, which dominated the Ag loads in the sewer system from the respective catchment (72–95%) and the Ag in the digested WWTP sludge (67%). Combined results from electron microscopy and X-ray absorption spectroscopy revealed that the Ag discharged from the laundry to the sewer consisted of about one third AgCl and two thirds Ag{sub 2}S, both forms primarily occurring as nanoparticles with diameters < 100 nm. During the 800 m transport in the sewer channel to the nearby WWTP, corresponding to a travel time of ~ 30 min, the remaining AgCl was transformed into nanoparticulate Ag{sub 2}S. Ag{sub 2}S-NP also dominated the Ag speciation in the digested sludge. In line with results from earlier studies, the very low Ag concentrations measured in the effluent of the WWTP (< 0.5 μg L{sup −1}) confirmed the very high removal efficiency of Ag from the wastewater stream (> 95%). - Highlights: • First field study on the transformation of AgCl nanoparticles released from a point source into the municipal sewer system. • Transformation of AgCl-NP into Ag{sub 2}S already occurred during 30-min transport in the

  7. Negotiated Grammar Transformation

    NARCIS (Netherlands)

    V. Zaytsev (Vadim)

    2012-01-01

    htmlabstractIn this paper, we study controlled adaptability of metamodel transformations. We consider one of the most rigid metamodel transformation formalisms — automated grammar transformation with operator suites, where a transformation script is built in such a way that it is essentially meant

  8. Study of the cubic - to - monoclinic transformation in magnesia partially stabilized zirconia

    International Nuclear Information System (INIS)

    Muccillo, R.

    1988-01-01

    The transformation of the cubic phase to the stable monoclinic phase in ZrO 2 : 3%MgO quenched from 1450 0 C to RT has been studied by X-ray diffractometry in order to explain the thermal hysteresis in the electrical conductivity. The monoclinic-to-cubic ratio has been measured for samples annealed in the 500 0 C-1000 0 C temperature range. The results show that the decrease in the cubic phase content is the main responsible for the thermal hysteresis in the electrical conductivity of the magnesia partially stabilized zirconia solid electrolytes. (author) [pt

  9. A Study to Determine The Perception of Transformational Leadership of The Hotel Staff

    Directory of Open Access Journals (Sweden)

    Ozan Çatır

    2015-09-01

    Full Text Available The aim of the research is determining the perception of transformational leadership of the hotel staff and identifying whether this perception differs depending on the situation at hotel and demographic characteristics. This study was performed on 391 employees in four and five star hotels operating in Antalya province. Data were collected through a questionnaire. As a result of the analysis, it was concluded that the employees showed intellectual stimulation behavior mostly for the organization’s benefit and that the perceptions of employees’ differ significantly with respect to educational status, position, total operating time, department, the condition of tourism education and the number of stars

  10. Dynamic Diffraction Studies on the Crystallization, Phase Transformation, and Activation Energies in Anodized Titania Nanotubes

    OpenAIRE

    Hani Albetran; Victor Vega; Victor M. Prida; It-Meng Low

    2018-01-01

    The influence of calcination time on the phase transformation and crystallization kinetics of anodized titania nanotube arrays was studied using in-situ isothermal and non-isothermal synchrotron radiation diffraction from room temperature to 900 °C. Anatase first crystallized at 400 °C, while rutile crystallized at 550 °C. Isothermal heating of the anodized titania nanotubes by an increase in the calcination time at 400, 450, 500, 550, 600, and 650 °C resulted in a slight reduction in anatase...

  11. A study of complex scaling transformation using the Wigner representation of wavefunctions.

    Science.gov (United States)

    Kaprálová-Ždánská, Petra Ruth

    2011-05-28

    The complex scaling operator exp(-θ ̂x̂p/ℏ), being a foundation of the complex scaling method for resonances, is studied in the Wigner phase-space representation. It is shown that the complex scaling operator behaves similarly to the squeezing operator, rotating and amplifying Wigner quasi-probability distributions of the respective wavefunctions. It is disclosed that the distorting effect of the complex scaling transformation is correlated with increased numerical errors of computed resonance energies and widths. The behavior of the numerical error is demonstrated for a computation of CO(2+) vibronic resonances. © 2011 American Institute of Physics

  12. Studies of martensitic transformation in Cu-Al alloys by positron annihilation

    International Nuclear Information System (INIS)

    Kojima, T.; Kuribayashi, K.; Doyama, M.

    1977-01-01

    The reverse martensitic transformations in Cu-23.5 at-%Al, and Cu-25.3 at-%Al have been studied by means of positron annihilation. The coincidence counting rates of angular correlation were measured as a function of the specimen temperature. The change of counting rates in heating run was rather different from that in cooling run due to the influence of tempering of martensitic structure. The results were interpreted by the change of the formation energy of a vacancy with phase transition. Influence of heating rate is also discussed. (orig.) [de

  13. Studies of gas phase ion/molecule reactions by Fourier transform ion cyclotron resonance mass spectrometry

    International Nuclear Information System (INIS)

    Kleingeld, J.C.

    1984-01-01

    An important field in which Fourier-transform ion cyclotron resonance has useful applications is that of gas phase ion chemistry, the subject of this thesis. First, the general picture of ion-molecule reactions in the gas phase is discussed. Next, some positive ion-molecule reactions are described, whereas the remaining chapters deal with negative ion-molecule reactions. Most of these studies have been performed using the FT-ICR method. Reactions involving H 3 O - and NH 4 - ions are described whereas the other chapters deal with larger organic complexes. (Auth.)

  14. Time-resolved FTIR [Fourier transform infrared] emission studies of laser photofragmentation and chain reactions

    International Nuclear Information System (INIS)

    Leone, S.R.

    1990-01-01

    Recent progress is described resulting from the past three years of DOE support for studies of combustion-related photofragmentation dynamics, energy transfer, and reaction processes using a time-resolved Fourier transform infrared (FTIR) emission technique. The FTIR is coupled to a high repetition rate excimer laser which produces radicals by photolysis to obtain novel, high resolution measurements on vibrational and rotational state dynamics. The results are important for the study of numerous radical species relevant to combustion processes. The method has been applied to the detailed study of photofragmentation dynamics in systems such as acetylene, which produces C 2 H; chlorofluoroethylene to study the HF product channel; vinyl chloride and dichloroethylene, which produce HCl; acetone, which produces CO and CH 3 ; and ammonia, which produces NH 2 . In addition, we have recently demonstrated use of the FTIR technique for preliminary studies of energy transfer events under near single collision conditions, radical-radical reactions, and laser-initiated chain reaction processes

  15. Simulation study on the lightning overvoltage invasion control transformer intelligent substation

    Science.gov (United States)

    Xi, Chuyan; Hao, Jie; Zhang, Ying

    2018-04-01

    By simulating lightning on substation line of one intelligent substation, research the influence of different lightning points on lightning invasion wave overvoltage, and the necessity of arrester for the main transformer. The results show, in a certain lightning protection measures, the installation of arrester nearby the main transformer can effectively reduce the overvoltage value of bus and the main transformer [1].

  16. An Ecological Perspective of Power in Transformational Learning: A Case Study of Ethical Vegans.

    Science.gov (United States)

    McDonald, Barbara; Cervero, Ronald M.; Courtenay, Bradley C.

    1999-01-01

    In-depth interviews with 12 ethical vegans revealed the process of becoming vegetarian. Transformative learning proved to be a journey rather than a one-time decision. Mezirow's transformative theory does not adequately account for the power relations central to this process. Therefore, transformative learning should be viewed more holistically.…

  17. Aging studies of batteries and transformers in class IE power systems

    International Nuclear Information System (INIS)

    Edson, J.L.; Roberts, E.W.

    1992-01-01

    A Phase I aging study of batteries used in 1E Power Systems of nuclear power plants concluded that significant aging effects for aged batteries are growth of positive plants, loosening of active material in plates that have grown, loss of active material caused by gassing and corrosion, and embrittlement of the lead grids and straps. These effects contribute to decreased electrical capacity and decreased seismic ruggedness which, during a seismic event, can lead to decreased electrical performance or complete failure. Subsequently a Phase II test program was conducted to determine if seismic ruggedness of aged batteries can be inadequate even if the electrical capacity is satisfactory, as determined by tests recommended by IEEE Std 450-1987, open-quote IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Storage Batteries for Generating Stations and Substations.close quotes In addition, a Phase I aging study of transformers in 1E Power Systems was performed to identify stressors and failure mechanisms, investigate whether transformers are showing the effects of aging as they grow older, and to determine if current surveillance methods are effective in mitigating aging effects. This paper presents the results of these studies

  18. Connecting the dots and merging meaning: using mixed methods to study primary care delivery transformation.

    Science.gov (United States)

    Scammon, Debra L; Tomoaia-Cotisel, Andrada; Day, Rachel L; Day, Julie; Kim, Jaewhan; Waitzman, Norman J; Farrell, Timothy W; Magill, Michael K

    2013-12-01

    To demonstrate the value of mixed methods in the study of practice transformation and illustrate procedures for connecting methods and for merging findings to enhance the meaning derived. An integrated network of university-owned, primary care practices at the University of Utah (Community Clinics or CCs). CC has adopted Care by Design, its version of the Patient Centered Medical Home. Convergent case study mixed methods design. Analysis of archival documents, internal operational reports, in-clinic observations, chart audits, surveys, semistructured interviews, focus groups, Centers for Medicare and Medicaid Services database, and the Utah All Payer Claims Database. Each data source enriched our understanding of the change process and understanding of reasons that certain changes were more difficult than others both in general and for particular clinics. Mixed methods enabled generation and testing of hypotheses about change and led to a comprehensive understanding of practice change. Mixed methods are useful in studying practice transformation. Challenges exist but can be overcome with careful planning and persistence. © Health Research and Educational Trust.

  19. Identity transformation

    DEFF Research Database (Denmark)

    Neergaard, Helle; Robinson, Sarah; Jones, Sally

    , as well as the resources they have when they come to the classroom. It also incorporates perspectives from (ii) transformational learning and explores the concept of (iii) nudging from a pedagogical viewpoint, proposing it as an important tool in entrepreneurship education. The study incorporates......This paper develops the concept of ‘pedagogical nudging’ and examines four interventions in an entrepreneurship classroom and the potential it has for student identity transformation. Pedagogical nudging is positioned as a tool, which in the hands of a reflective, professional......) assists students in straddling the divide between identities, the emotions and tensions this elicits, and (iv) transform student understanding. We extend nudging theory into a new territory. Pedagogical nudging techniques may be able to unlock doors and bring our students beyond the unacknowledged...

  20. From transitions to transformation - A study of pharmacists developing patient-centered communication skills.

    Science.gov (United States)

    Luetsch, Karen; Burrows, Judith

    2017-08-12

    Pharmacists' communication with patients often focuses on technical aspects of advice giving, while limiting socio-emotional content. To develop pharmacists' patient-centered communication a learning and practice module integrating motivational interviewing (MI) was designed for an online postgraduate program, and its impact on their self-described practice evaluated. To investigate whether training in patient-centered communication changes pharmacists' perceptions of communicating with patients, and how any changes in their communication style influenced interactions and relationships with patients. A descriptive, qualitative study analyzing reflective journal entries detailing pharmacists' experiences of implementing patient-centered communication in practice was designed, evaluating reflections on initial patient interactions after training and 9-12 weeks later. Using the framework method of content and thematic analysis, an evaluation framework was devised that integrated communication, change and learning theories. Reflections were categorized within the framework as transitional (e.g. using good communication skills), transactional (e.g. using MI techniques, achieving reciprocity) or transformational (e.g. describing transformative learning, changing frames of reference in understanding of patient-centeredness). Differences between the first and last journal entries were evaluated and analyzed using descriptive statistics. Eighty-nine pharmacists provided two reflective journal entries for evaluation. Over 9-12 weeks, pharmacists described a change in their perspective of patient-centeredness, how they expanded the socio-emotional aspects of communication and succeeded in difficult conversations. When applying the thematic evaluation framework to initial journal entries, 38 (42%) of reflections fell within the transitional category, 51 (58%) were deemed transactional and none transformational. This changed to 10 (11%) transitional, 45 (51%) transactional and

  1. Morphological transformations of diblock copolymers in binary solvents: A simulation study

    Science.gov (United States)

    Wang, Zheng; Yin, Yuhua; Jiang, Run; Li, Baohui

    2017-12-01

    Morphological transformations of amphiphilic AB diblock copolymers in mixtures of a common solvent (S1) and a selective solvent (S2) for the B block are studied using the simulated annealing method. We focus on the morphological transformation depending on the fraction of the selective solvent C S2, the concentration of the polymer C p , and the polymer-solvent interactions ɛ ij ( i = A, B; j = S1, S2). Morphology diagrams are constructed as functions of C p , C S2, and/or ɛ AS2. The copolymer morphological sequence from dissolved → sphere → rod → ring/cage → vesicle is obtained upon increasing C S2 at a fixed C p . This morphology sequence is consistent with previous experimental observations. It is found that the selectivity of the selective solvent affects the self-assembled microstructure significantly. In particular, when the interaction ɛ BS2 is negative, aggregates of stacked lamellae dominate the diagram. The mechanisms of aggregate transformation and the formation of stacked lamellar aggregates are discussed by analyzing variations of the average contact numbers of the A or B monomers with monomers and with molecules of the two types of solvent, as well as the mean square end-to-end distances of chains. It is found that the basic morphological sequence of spheres to rods to vesicles and the stacked lamellar aggregates result from competition between the interfacial energy and the chain conformational entropy. Analysis of the vesicle structure reveals that the vesicle size increases with increasing C p or with decreasing C S2, but remains almost unchanged with variations in ɛ AS2.

  2. Study of the kinetics of beta-alpha transformation in uranium; Doprinos proucavanju kinetike beta-alfa transformacije u uranijumu

    Energy Technology Data Exchange (ETDEWEB)

    Drobnjak, Dj; Mihajlovic, A [Institute of Nuclear Sciences Boris Kidric, Vinca, Beograd (Yugoslavia)

    1965-11-15

    The objective of this task was to study the influence of cooling rate, heating temperature and the time of spent in beta state on the kinetics of the beta {yields} alpha transformation. The experimental results are presented in this report.

  3. Using ERP Systems to Transform Business Processes: A Case Study at a Precession Engineering Company

    Directory of Open Access Journals (Sweden)

    C.K.M.Lee

    2009-10-01

    Full Text Available Enterprises nowadays strive to keep transforming their business processes in accordance with the fastchanging customer demands so as to survive the intense global competition. In an attempt to provide practitioners with an insight into ERP implementation and the resulting business performances, this paper investigate how a successful ERP implementation can help transform enterprises processes. Case based research which is based on an in-depth observation under managerial and practitioner situation. A case study at a precession engineering company is conducted to evaluate the feasibility of the proposed strategic enterprise information model. This paper focuses on the implementation of Sales & Marketing and Warehouse modules of an ERP system. The key performance indicators are used to evaluate how the ERP implementation can improve the business processes. It is found that ERP helps to improve data visibility and improve on-time delivery but less effective on improving employee productivity. This research proposes an enterprise information model to exploit what strategy should be formulate and how ERP tactic can be implemented in company to enhance enterprise competitive advantages. The strategic enterprise information model is formulated based on our in-depth case study and ERP consultant's experience.

  4. Structure of transformer oil-based magnetic fluids studied using acoustic spectroscopy

    International Nuclear Information System (INIS)

    Kúdelčík, Jozef; Bury, Peter; Drga, Jozef; Kopčanský, Peter; Závišová, Vlasta; Timko, Milan

    2013-01-01

    The structural changes in transformer oil-based magnetic fluids upon the effect of an external magnetic field and temperature were studied by acoustic spectroscopy. The attenuation of acoustic wave was measured as a function of the magnetic field in the range of 0–300 mT and in the temperature range of 15–35 °C for various magnetic nanoparticles concentrations. The effect of anisotropy of the acoustic attenuation was determined, too. The both strong influence of the magnetic field on the acoustic attenuation and its hysteresis were observed. When a magnetic field is increased, the interaction between the external magnetic field and the magnetic moments of the nanoparticles occurs, leading to the aggregation of magnetic nanoparticles and following clusters formation. However, the temperature of magnetic fluids also has very important influence on the structural changes because of the mechanism of thermal motion that acts against the cluster creation. The observed influences of both magnetic field and temperature on the investigated magnetic fluid structure are discussed. - Highlights: ► Structural changes in transformer oil-based magnetic fluids were investigated. ► The acoustic spectroscopy as the method of investigation was used. ► The influence of magnetic field on the structural was studied. ► The influence of temperatures on the structures was investigated, too. ► The influence of external conditions on the structure of MF is interpreted.

  5. Experimental and theoretical studies on the gas/solid/gas transformation cycle in extraterrestrial environments

    Science.gov (United States)

    Cottin, Hervé; Gazeau, Marie-Claire; Chaquin, Patrick; Raulin, François; Bénilan, Yves

    2001-12-01

    The ubiquity of molecular material in the universe, from hydrogen to complex organic matter, is the result of intermixed physicochemical processes that have occurred throughout history. In particular, the gas/solid/gas phase transformation cycle plays a key role in chemical evolution of organic matter from the interstellar medium to planetary systems. This paper focuses on two examples that are representative of the diversity of environments where such transformations occur in the Solar System: (1) the photolytic evolution from gaseous to solid material in methane containing planetary atmospheres and (2) the degradation of high molecular weight compounds into gas phase molecules in comets. We are currently developing two programs which couple experimental and theoretical studies. The aim of this research is to provide data necessary to build models in order to better understand (1) the photochemical evolution of Titan's atmosphere, through a laboratory program to determine quantitative spectroscopic data on long carbon chain molecules (polyynes) obtained in the SCOOP program (French acronym for Spectroscopy of Organic Compounds Oriented for Planetology), and (2) the extended sources in comets, through a laboratory program of quantitative studies of photochemical and thermal degradation processes on relevant polymers (e.g., Polyoxymethylene) by the SEMAPhOrE Cometaire program (French acronym for Experimental Simulation and Modeling Applied to Organic Chemistry in Cometary Environment).

  6. Experimental Study on Breakdown Characteristics of Transformer Oil Influenced by Bubbles

    Directory of Open Access Journals (Sweden)

    Chunxu Qin

    2018-03-01

    Full Text Available Bubbles will reduce the electric strength of transformer oil, and even result in the breakdown of the insulation. This paper has studied the breakdown voltages of transformer oil and oil-impregnated pressboard under alternating current (AC and direct current (DC voltages. In this paper, three types of electrodes were applied: cylinder-plan electrodes, sphere-plan electrodes, and cone-plan electrodes, and the breakdown voltages were measured in both no bubbles and bubbles. The sphere-sphere electrodes were used to study the breakdown voltage of the oil-impregnated pressboard. The results showed that under the influence of bubble, the breakdown voltage of the cylinder-plan electrode dropped the most, and the breakdown voltage of the cone-plan electrode dropped the least. The bubbles motion was the key factor of the breakdown. The discharge types of the oil-impregnated pressboard were different with bubbles, and under DC, the main discharge type was flashover along the oil-impregnated pressboard, while under AC, the main discharge type was breakdown through the oil-impregnated pressboard.

  7. Structure of transformer oil-based magnetic fluids studied using acoustic spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Kudelcik, Jozef, E-mail: kudelcik@fyzika.uniza.sk [Department of Physics, University of Zilina, Univerzitna 1, 010 01 Zilina (Slovakia); Bury, Peter; Drga, Jozef [Department of Physics, University of Zilina, Univerzitna 1, 010 01 Zilina (Slovakia); Kopcansky, Peter; Zavisova, Vlasta; Timko, Milan [Department of Magnetism, IEP SAS, Watsonova 47, 040 01 Kosice (Slovakia)

    2013-01-15

    The structural changes in transformer oil-based magnetic fluids upon the effect of an external magnetic field and temperature were studied by acoustic spectroscopy. The attenuation of acoustic wave was measured as a function of the magnetic field in the range of 0-300 mT and in the temperature range of 15-35 Degree-Sign C for various magnetic nanoparticles concentrations. The effect of anisotropy of the acoustic attenuation was determined, too. The both strong influence of the magnetic field on the acoustic attenuation and its hysteresis were observed. When a magnetic field is increased, the interaction between the external magnetic field and the magnetic moments of the nanoparticles occurs, leading to the aggregation of magnetic nanoparticles and following clusters formation. However, the temperature of magnetic fluids also has very important influence on the structural changes because of the mechanism of thermal motion that acts against the cluster creation. The observed influences of both magnetic field and temperature on the investigated magnetic fluid structure are discussed. - Highlights: Black-Right-Pointing-Pointer Structural changes in transformer oil-based magnetic fluids were investigated. Black-Right-Pointing-Pointer The acoustic spectroscopy as the method of investigation was used. Black-Right-Pointing-Pointer The influence of magnetic field on the structural was studied. Black-Right-Pointing-Pointer The influence of temperatures on the structures was investigated, too. Black-Right-Pointing-Pointer The influence of external conditions on the structure of MF is interpreted.

  8. Stemflow Variability in Tropical Lowland Forest Landscape Transformation System: Case Study at Jambi Province, Indonesia

    Directory of Open Access Journals (Sweden)

    Bejo Slamet

    2015-06-01

    Full Text Available Land cover change may cause change on the hydrological function of an area, particularly on the distribution of rainfall that reach land surface. This study describes the characteristic of stemflow occurred within 4 ecosystems in Jambi, namely logged forest, jungle rubber, rubber plantation, and oil palm plantation. The main objective of the study was to measure the variability of stemflow in those 4 ecosystems. The main data used were rainfall and stemflow data that were directly measured for 5 months. The derived regression equation model showed that stemflow increase with rainfall depth. It was shown that values of stemflow amongs plantation types was varied indicated by the difference of its regression coefficients, as well as variations of the rainfall at the same transformation type. The percentage of stemflow to rainfall was ranging from 0.04–0.21% for rubber, 0.10–0.38% for jungle rubber, 0.28–0.54% for forest, and 0.84–3.07% for oil palm. The oil palm provided the highest stemflow volume compared to other land cover type. The uniqueness of oil palm canopy may cause the drainage of water from the canopy to the main stem that indicated by highest stemflow funneling ratio value. Rainfall significantly affected the amount of stemflow compared with the characteristics of the plant. Keywords: forest transformation, land cover change, stemflow variability, stemflow funnelling ratio

  9. Surface morphological study of the transformation strain of martensites and bainites in copper alloys

    International Nuclear Information System (INIS)

    Marukawa, K.; Kumagai, I.; Takezawa, K.

    2000-01-01

    Transformation strain associated with martensites and bainites has been determined by surface relief measurements with an atomic force microscope. To this end, morphological data of transformation products have been combined with data on their crystallographic orientations, which have been determined by the electron back-scatter diffraction technique. The results have shown that the transformation strain of bainites has a comparable value to that of martensites in the same alloy. The orientation relationship between the transformation products and the parent crystal has also been determined. The relationship for bainites as well as martensites was consistent with the prediction of the phenomenological theory for the transformation. It was concluded that the transformation mechanism of bainites involves lattice shearing in a manner similar to that of the martensitic transformation. (orig.)

  10. The Bargmann transform and canonical transformations

    International Nuclear Information System (INIS)

    Villegas-Blas, Carlos

    2002-01-01

    This paper concerns a relationship between the kernel of the Bargmann transform and the corresponding canonical transformation. We study this fact for a Bargmann transform introduced by Thomas and Wassell [J. Math. Phys. 36, 5480-5505 (1995)]--when the configuration space is the two-sphere S 2 and for a Bargmann transform that we introduce for the three-sphere S 3 . It is shown that the kernel of the Bargmann transform is a power series in a function which is a generating function of the corresponding canonical transformation (a classical analog of the Bargmann transform). We show in each case that our canonical transformation is a composition of two other canonical transformations involving the complex null quadric in C 3 or C 4 . We also describe quantizations of those two other canonical transformations by dealing with spaces of holomorphic functions on the aforementioned null quadrics. Some of these quantizations have been studied by Bargmann and Todorov [J. Math. Phys. 18, 1141-1148 (1977)] and the other quantizations are related to the work of Guillemin [Integ. Eq. Operator Theory 7, 145-205 (1984)]. Since suitable infinite linear combinations of powers of the generating functions are coherent states for L 2 (S 2 ) or L 2 (S 3 ), we show finally that the studied Bargmann transforms are actually coherent states transforms

  11. Study on the Strategy of Transforming Students with Learning Difficulties in Polytechnic Schools

    Directory of Open Access Journals (Sweden)

    Fan Cui

    2014-05-01

    Full Text Available As demand of China’s social construction increasing and as the development of vocational education, polytechnic school plays an increasing important part, which, on the other hand, constitutes unprecedented challenges to the teaching in polytechnic schools. Most students, in the aspect of vocational education, are those from middle schools who have difficulties in their study. These students are entitled “Underachievers”. They are short in intellectual study and poor in curricular foundations. Teaching tasks cannot be satisfactorily accomplished in many of the polytechnic schools for the increasing number of underachievers. What have been harnessing the polytechnic school development is the poor study effect of these students. In this article, the internal reason of character and the external reason of social influence are analyzed as the cause that contributes to learning difficulties. And this article offers a pragmatic set of ideas for underachiever transformation.

  12. Short of transformation: American ADN students' thoughts, feelings, and experiences of studying abroad in a low-income country.

    Science.gov (United States)

    Foronda, Cynthia L; Belknap, Ruth Ann

    2012-06-03

    ADN students are a large yet distinct subgroup of nursing students who require research and understanding. The purpose of this study was to describe the thoughts, feelings, and experiences of American associate degree nursing (ADN) students who participated in a short study abroad course in a low-income country. A qualitative, narrative method was used. Three categories emerged from the analysis. Participants revealed thoughts of "constant comparisons", feelings of an "emotional journey", and they experienced "learning". Participants did not demonstrate perspective transformation as defined by Mezirow as participants signified no intent for social action. Several potential blocks to perspective transformation were identified: egocentrism/emotional disconnect, perceived powerlessness/being overwhelmed, and a vacation mindset. The findings provide insight into the student experience of studying abroad. Transformative learning is not a guaranteed result. Nurse educators must consider strategies to foster transformation including discussing global systemic oppressors, international relations, coping, connecting, and social action.

  13. Response transforms from comparative study of commercial pulsed-neutron-capture logging systems

    International Nuclear Information System (INIS)

    Salaita, G.N.

    1992-01-01

    This paper reports that three generations of Schlumberger's Thermal Decay Time (TDT SM ) logging devices - viz., TDT-K, TDT-M, and TDT-P - along with an Atlas Wireline PDK-100 SM system were run in a Saudi Aramco well. The wellbore (8 1/2 in. with 7-in. casing) penetrated a sequence of clean sand, shaly sand, and shale streaks as exhibited by the openhole natural gamma ray log. The initial wellbore fluid was diesel. The fluid was then changed to brines of 42,000 and 176,000 ppm NaCl, respectively. Three repeat passes at a logging speed of 900 ft/hr were obtained by each device for each borehole liquid. As a result of this extensive comparative study, a set of departure curves and mathematical transforms was developed primarily for standardizing the various Schlumberger tools to a common reference logging system and/or borehole environment. The transforms were used beneficially to determine residual oil saturation (ROS) from time-lapse logs in a Saudi Aramco reservoir

  14. How transformational leadership appears in action with adverse events? A study for Finnish nurse manager.

    Science.gov (United States)

    Liukka, Mari; Hupli, Markku; Turunen, Hannele

    2017-12-26

    The aim of this study was to determine whether elements of transformational leadership are present in nursing managers' actions following adverse events. Transformational leadership exerts a positive influence on organisational culture and patient safety. Eleven nursing managers were interviewed individually using a semi-structured format. Data were analysed using inductive content analysis. Four themes emerged relating to nursing managers' actions following adverse events: patient-centredness as a principle for common action, courage to reform operational models to prevent future adverse events, nursing staff's encouragement of open and blame-free discussion, and challenge to recognize adverse events. Nursing managers must understand their responsibilities and the importance of making it clear to staff that patient-centredness should be evident in all health care actions. Nursing managers must also recognize the need to ensure that staff treat patients' interests as the top priority. If an adverse event occurs, the situation should be discussed with the nursing staff and any unique aspects of the event must be accounted for. Nursing managers must have the skill to motivate and empower staff to find new ways to work, to prevent adverse events and to promote patient safety. © 2017 John Wiley & Sons Ltd.

  15. Partial discharge measurements on 110kV current transformers. Setting the control value. Case study

    Science.gov (United States)

    Dan, C.; Morar, R.

    2017-05-01

    The case study presents a series of partial discharge measurements, reflecting the state of insulation of 110kV CURRENT TRANSFORMERS located in Sibiu county substations. Measurements were performed based on electrical method, using MPD600: an acquisition and analysis toolkit for detecting, recording, and analyzing partial discharges. MPD600 consists of one acquisition unit, an optical interface and a computer with dedicated software. The system allows measurements of partial discharge on site, even in presence of strong electromagnetic interferences because it provides synchronous acquisition from all measurement points. Therefore, measurements, with the ability to be calibrated, do render: - a value subject to interpretation according to IEC 61869-1:2007 + IEC 61869-2:2012 + IEC 61869-3:2011 + IEC 61869-5:2011 and IEC 60270: 2000; - the possibility to determine the quantitative limit of PD (a certain control value) to which the equipment can be operated safely and repaired with minimal costs (relative to the high costs implied by eliminating the consequences of a failure) identified empirically (process in which the instrument transformer subjected to the tests was completely destroyed).

  16. Fourier Transform Infrared Analysis of Urinary Calculi and Metabolic Studies in a Group of Sicilian Children.

    Science.gov (United States)

    D'Alessandro, Maria Michela; Gennaro, Giuseppe; Tralongo, Pietro; Maringhini, Silvio

    2017-05-01

    Prevalence of urinary calculi in children has been increasing in the past years. We performed an analysis of the chemical composition of stones formers of the pediatric population in our geographical area over the years 2005 to 2013. Fourier transform infrared spectroscopy was employed for the determination of the calculus composition of a group of Sicilian children, and metabolic studies were performed to formulate the correct diagnosis and establish therapy. The prevalence of stone formation was much higher for boys than for girls, with a sex ratio of 1.9:1. The single most frequent component was found to be calcium oxalate monohydrate, and calcium oxalates (pure or mixed calculi) were the overall most frequent components. Calcium phosphates ranked 2nd for frequency, most often in mixed calculi, while urates ranked 3rd. The metabolic disorder most often associated with pure calcium oxalate monohydrate calculi was hypocitraturia, while hyperoxaluria was predominantly associated with calcium oxalate dihydrate calculi. Mixed calculi had the highest prevalence in our pediatric population. Our data showed that Fourier transform infrared spectroscopy was a useful tool for the determination of the calculi composition.

  17. Glucose transformation to 5-hydroxymethylfurfural in acidic ionic liquid: A quantum mechanical study.

    Science.gov (United States)

    Arifin; Puripat, Maneeporn; Yokogawa, Daisuke; Parasuk, Vudhichai; Irle, Stephan

    2016-01-30

    Isomerization and transformation of glucose and fructose to 5-hydroxymethylfurfural (HMF) in both ionic liquids (ILs) and water has been studied by the reference interaction site model self-consistent field spatial electron density distribution (RISM-SCF-SEDD) method coupled with ab initio electronic structure theory, namely coupled cluster single, double, and perturbative triple excitation (CCSD(T)). Glucose isomerization to fructose has been investigated via cyclic and open chain mechanisms. In water, the calculations support the cyclic mechanism of glucose isomerization; with the predicted activation free energy is 23.8 kcal mol(-1) at experimental condition. Conversely, open ring mechanism is more favorable in ILs with the energy barrier is 32.4 kcal mol(-1) . Moreover, the transformation of fructose into HMF via cyclic mechanism is reasonable; the calculated activation barriers are 16.0 and 21.5 kcal mol(-1) in aqueous and ILs solutions, respectively. The solvent effects of ILs could be explained by the decomposition of free energies and radial distribution functions of solute-solvent that are produced by RISM-SCF-SEDD. © 2015 Wiley Periodicals, Inc.

  18. Modernization Theory and House Garden Transformation; Erbil City as Case Study

    Directory of Open Access Journals (Sweden)

    Salahaddin Y. Baper

    2013-11-01

    Full Text Available Recently, the concept of modernity and its influences on global warming comes to be a common topic in architectural debates. The disappearance of gardens in the contemporary house layouts generated a need for new approaches to create a sustainable network of green areas within residential neighborhoods. The objectives of this paper intend to emphasize on the holistic phenomenon of house garden transformations. The rationale behind selecting cases inside Erbil city, Iraq return to its historical background which passed through rapid transformations due to the political, economic, and cultural changes. This paper aims to identify reason behind disappearance of house gardens in new developments. Moreover, it describes the physical elements of local traditions in different periods. The analytical methodology used in this paper relies on four different periods of the city evolution. It discusses the building garden visual elements in terms of architectural physical factors. The study emphases on two types of analyses, the morphology analyses for each period individually, and comparative analyses between different periods. The findings of this paper will indicate the crucial factors that affecting the disappearance of house garden as well as the general positive effects of vegetation in urban contexts.

  19. Study of Error Propagation in the Transformations of Dynamic Thermal Models of Buildings

    Directory of Open Access Journals (Sweden)

    Loïc Raillon

    2017-01-01

    Full Text Available Dynamic behaviour of a system may be described by models with different forms: thermal (RC networks, state-space representations, transfer functions, and ARX models. These models, which describe the same process, are used in the design, simulation, optimal predictive control, parameter identification, fault detection and diagnosis, and so on. Since more forms are available, it is interesting to know which one is the most suitable by estimating the sensitivity of the model to transform into a physical model, which is represented by a thermal network. A procedure for the study of error by Monte Carlo simulation and of factor prioritization is exemplified on a simple, but representative, thermal model of a building. The analysis of the propagation of errors and of the influence of the errors on the parameter estimation shows that the transformation from state-space representation to transfer function is more robust than the other way around. Therefore, if only one model is chosen, the state-space representation is preferable.

  20. Metallographic study of ferrite → sigma transformation using ferromagnetic colloid, microprobe analysis, and color etching

    International Nuclear Information System (INIS)

    Gray, R.J.; Crouse, R.S.; Sikka, V.K.; King, R.T.

    1976-01-01

    The mechanical properties of ferrite-containing austenitic stainless steel base metal and weldments are usually adversely affected by prolonged exposure to temperatures in the 482-900 0 C (900-1652 0 F) range. One cause of the property alteration is related to the transformation of relatively ductile delta-ferrite to less ductile sigma-phase. Attempts to identify sigma and delta ferrite phases by color staining techniques alone are well documented; however, the results are often questionable due to the difficulty in maintaining consistent color identifications. This investigation is concerned with the microstructural responses of the ferromagnetic delta-ferrite phase and the paramagnetic sigma-phase to a ferromagnetic iron colloid in a magnetic field. Such positive or negative responses of the two phases to the colloid offer a more definitive identification. With this technique, the identification of small amounts of these phases in the microstructure is limited only by the highest magnification and resolution of the optical microscope. The procedure is substantiated in this metallographic study with microprobe analysis and color metallography. Several examples of the correlative use of these three techniques in identifying varying amounts of delta-ferrite yields sigma transformation are presented

  1. Innovations In Diabetes Care Around the World: Case Studies Of Care Transformation Through Accountable Care Reforms.

    Science.gov (United States)

    Thoumi, Andrea; Udayakumar, Krishna; Drobnick, Elizabeth; Taylor, Andrea; McClellan, Mark

    2015-09-01

    The rising prevalence, health burden, and cost of chronic diseases such as diabetes have accelerated global interest in innovative care models that use approaches such as community-based care and information technology to improve or transform disease prevention, diagnosis, and treatment. Although evidence on the effectiveness of innovative care models is emerging, scaling up or extending these models beyond their original setting has been difficult. We developed a framework to highlight policy barriers-institutional, regulatory, and financial-to the diffusion of transformative innovations in diabetes care. The framework builds on accountable care principles that support higher-value care, or better patient-level outcomes at lower cost. We applied this framework to three case studies from the United States, Mexico, and India to describe how innovators and policy leaders have addressed barriers, with a focus on important financing barriers to provider and consumer payment. The lessons have implications for policy reform to promote innovation through new funding approaches, institutional reforms, and performance measures with the goal of addressing the growing burdens of diabetes and other chronic diseases. Project HOPE—The People-to-People Health Foundation, Inc.

  2. Combustion stratification study of partially premixed combustion using Fourier transform analysis of OH* chemiluminescence images

    KAUST Repository

    Izadi Najafabadi, Mohammad

    2017-11-06

    A relatively high level of stratification (qualitatively: lack of homogeneity) is one of the main advantages of partially premixed combustion over the homogeneous charge compression ignition concept. Stratification can smooth the heat release rate and improve the controllability of combustion. In order to compare stratification levels of different partially premixed combustion strategies or other combustion concepts, an objective and meaningful definition of “stratification level” is required. Such a definition is currently lacking; qualitative/quantitative definitions in the literature cannot properly distinguish various levels of stratification. The main purpose of this study is to objectively define combustion stratification (not to be confused with fuel stratification) based on high-speed OH* chemiluminescence imaging, which is assumed to provide spatial information regarding heat release. Stratification essentially being equivalent to spatial structure, we base our definition on two-dimensional Fourier transforms of photographs of OH* chemiluminescence. A light-duty optical diesel engine has been used to perform the OH* bandpass imaging on. Four experimental points are evaluated, with injection timings in the homogeneous regime as well as in the stratified partially premixed combustion regime. Two-dimensional Fourier transforms translate these chemiluminescence images into a range of spatial frequencies. The frequency information is used to define combustion stratification, using a novel normalization procedure. The results indicate that this new definition, based on Fourier analysis of OH* bandpass images, overcomes the drawbacks of previous definitions used in the literature and is a promising method to compare the level of combustion stratification between different experiments.

  3. Human cell transformation in the study of sunlight-induced cancers in the skin of man

    International Nuclear Information System (INIS)

    Sutherland, B.M.; Bennett, P.V.

    1988-01-01

    Human cell transformation provides a powerful approach to understanding - at the cellular and molecular levels - induction of cancers in the skin of man. A principal approach to this problem is the direct transformation of human skin cells by exposure to ultraviolet and/or near-UV radiation. The frequency of human cells transformed to anchorage independence increases with radiation exposure; the relative transforming efficiencies of different wavelengths implies that direct absorption by nucleic acids is a primary initial event. Partial reversal of potential transforming lesions by photoreactivation suggests that pyrimidine dimers, as well as other lesions, are important in UV transformation of human cells. Human cells can also be transformed by transfection with cloned oncogenes, or with DNAs from tumors or tumor cell lines. Cells treated by the transfection procedure (but without DNA) or cells transfected with DNAs from normal mammalian cells or tissues show only background levels of transformation. Human cells can be transformed to anchorage-independent growth by DNAs ineffective in transformation of NIH 3T3 cells (including most human skin cancers), permitting the analysis of oncogenic molecular changes even in tumor DNAs difficult or impossible to analyze in rodent cell systems. 29 refs.; 4 figs.; 1 table

  4. Study on Europium-Doped Hydroxyapatite Nanoparticles by Fourier Transform Infrared Spectroscopy and Their Antimicrobial Properties

    Directory of Open Access Journals (Sweden)

    Simona-Liliana Iconaru

    2013-01-01

    Full Text Available Fourier transform infrared spectroscopy (FT-IR analysis was conducted on europium-doped hydroxyapatite, Ca10-xEux(PO46(OH2 nanocrystalline powders (Eu:HAp with 0≤xEu≤0.2. Antimicrobial studies were also performed for the first time on Eu:HAp. The antimicrobial properties of Eu:HAp nanoparticles with 0≤xEu≤0.2 on Gram-negative (E. coli ATCC 25922, Pseudomonas aeruginosa 1397 and Gram-positive (Staphylococcus aureus 0364, Enterococcus faecalis ATCC 29212 bacteria systems and a species of fungus (Candida albicans ATCC 10231 were reported. Our study demonstrates that the antimicrobial activity of Eu:HAp nanoparticles is dependent on the europium concentration.

  5. Fourier transform IR studies on the interaction of selected chemicals with isolated cuticles

    International Nuclear Information System (INIS)

    Luque, P.; Ramirez, F.J.; Heredia, A.; Bukovac, M.J.

    1994-01-01

    It is known that the plant cuticle represents the first barrier that must be overcome by any chemical reaching the plant surface from the atmosphere before entering the plant. Because of the importance of the cuticle as a barrier to penetration of a wide variety of compounds, its morphology, chemistry, and permeability have been extensively studied. However, only limited information is available on the nature of functional chemical groups present and their interaction and role during the penetration process. The usefulness of in situ Fourier transform infrared spectroscopy studies in identifying functional groups present in isolated cuticles is described and their relationships to the structure of the cuticular membrane are discussed. Applications of infrared spectroscopy on the presence and role of phenolics in the cuticle structure and during the cuticle development, nitrogen oxide binding to isolated cuticles, and the interactions between selected chemical probes during sorption by the cuticle are also described. (orig.)

  6. Changes in cell surface structure by viral transformation studied by binding of lectins differing in sugar specificity.

    Science.gov (United States)

    Tsuda, M; Kurokawa, T; Takeuchi, M; Sugino, Y

    1975-10-01

    Changes in cell surface structure by viral transformation were studied by examining changes in the binding of various lectins differing in carbohydrate specificities. Binding of lectins was assayed directly using cells grown in coverslips. The following 125I-lectins were used: Concanavalin-A (specific for glucose and mannose), wheat germ agglutinin (specific for N-acetylglucosamine), castor bean agglutinin (specific for galactose), Wistaria floribunda agglutinin (specific for N-acetylgalactosamine), and soybean agglutinin (specific for N-acetyl-galactosamine). Cells for a clone, SS7, transformed by bovine adenovirus type-3, were found to bind 5 to 6 times more Wistaria floribunda agglutinin than the normal counterpart cells (clone C31, from C3H mouse kidney). In contrast, the binding of soybean agglutinin, which has a sugar specificity similar to Wistaria floribunda agglutinin, to normal and transformed cells was similar. The binding of wheat germ agglutinin and castor bean agglutinin, respectively, to normal and transformed cells was also similar. However, normal cells bound twice as much concanavalin-A as transformed cells. Only half as much Wistaria floribunda agglutinin was bound to transformed cells when they had been dispersed with EDTA. These changes in the number of lectin binding sites on transformation are thought to reflect alteration of the cell surface structure. The amount of lectins bound per cell decreased with increase in cell density, especially in the case of binding of Wistaria floribunda agglutinin to normal cells.

  7. Charismatic, transformational and visionary dimensions in sport leadership : toward news paths for the study of coach-athletes relationships

    OpenAIRE

    Gomes, António Rui; Cruz, José Fernando A.; Sousa, Sara Almeida e

    2006-01-01

    In this paper we suggest possible applications of the charismatic, transformational and visionary leadership approaches to the sports field, to help understand the dynamics of the coach-athlete relationship. We present the results of our research using these concepts to analyze the work of sports managers. We note that few studies have focused on coaches as promoters of charismatic and transformational behaviors on athletes and teams.

  8. Low-energy electron scattering from CO. 2: Ab-initio study using the frame-transformation theory

    Science.gov (United States)

    Chandra, N.

    1976-01-01

    The Wigner-Eisenbud R matrix method has been combined with the frame transformation theory to study electron scattering from molecular systems. The R matrix, calculated at the boundary point of the molecular core radius, has been transformed to the space frame in order to continue the solution of the scattering equations in the outer region where rotational motion of the nuclei is taken into account. This procedure has been applied to a model calculation of thermal energy electron scattering from CO.

  9. A theoretical study of the omega-phase transformation in metals

    Science.gov (United States)

    Sanati, Mahdi

    I have studied the formation of o-phase from electronic and mesoscopic (domain wall) points of view. To study the formation of domain walls, I have extended the Landau model of Cook for the o-phase transition by including a spatial gradient (Ginzburg) term of the scalar order parameter. In general, the Landau free energy is an asymmetric double-well potential. From the variational derivative of the total free energy I obtained a static equilibrium condition. By solving this equation for different physical parameters and boundary conditions, I obtained different quasi-one-dimensional soliton-like solutions. These solutions correspond to three different types of domain walls between the o-phase and the beta-matrix. These results are used to model the formation of the o-phase in bcc Ti. Canonical band model and first principles calculations confirmed the instability of the bcc-phase of group III and IV transition metals with respect to the o-phase transformation. I showed that the d-electron density is the controlling parameter for this type of the transformation. Also the possibility of formation of the o-phase for rare earth metals is discussed. First-principles full-potential linear muffin-tin orbital method (FPLMTO) calculations are performed for o-type displacement of the atoms to study the formation of the o-phase in TiAl and Ti 3Al2Nb alloys. The results of my calculations showed an instability in ordered B2 TiAl structure with respect to the o-phase when one third of the Al atoms are replaced by Nb atoms. These phenomena are explained, first by symmetry arguments; then a pair potential model is used to illustrate this instability based on interactions between different pair of atoms derived from the electronic structure. In addition, importance of the atomic arrangements on the structural stability of the Ti3Al2 Nb system is discussed.

  10. Rethinking exercise identity: a qualitative study of physically inactive cancer patients’ transforming process while undergoing chemotherapy

    Science.gov (United States)

    Adamsen, Lis; Andersen, Christina; Lillelund, Christian; Bloomquist, Kira; Møller, Tom

    2017-01-01

    Objective To explore physically inactive breast and colon cancer patients’ prediagnosis exercise history and attitudes to physical activity (PA) and experiences in initiating PA while undergoing adjuvant chemotherapy. Design An explorative qualitative study guided the interpretive analysis of semistructured, open-ended interviews conducted at initiation of chemotherapy and after 12 weeks. The study was embedded in a pilot randomised controlled trial. Setting Participants were recruited from the Oncological Department at a hospital in Copenhagen, Denmark. Participants 33 patients with cancer, median age 49 years: 25 patients with breast cancer and 8 with colon cancer, 72% with a low cardiac respiratory fitness level and the majority with a high level of education. Patients received adjuvant chemotherapy, oncologist’s PA recommendation and exercise, cancer nurse specialist’s counselling prior to allocation to PA interventions or waitlist control group. Results Prediagnosis exercise had been excluded from patients’ daily lives due to perceptions of exercise as boring, lack of discipline and stressful work conditions for both genders. Recommendations from oncologists and nurses inspired the patients to reconsider their attitudes and behaviour by accepting recruitment and participation in PA interventions during chemotherapy. Despite extensive side effects, most patients adhered to their PA commitment due to their perception of the bodily, emotional and social benefits and support of healthcare professionals, peers and family. Conclusion The patients’ attitude towards exercise transformed from having no priority in patients’ daily lives prediagnosis to being highly prioritised. This study identified four important phases in the exercise transformation process during the patients’ treatment trajectory of relevance to clinicians in identifying, motivating and supporting physically inactive patients with cancer at long-term risk. Clinicians should address

  11. Approximation for discrete Fourier transform and application in study of three-dimensional interacting electron gas.

    Science.gov (United States)

    Yan, Xin-Zhong

    2011-07-01

    The discrete Fourier transform is approximated by summing over part of the terms with corresponding weights. The approximation reduces significantly the requirement for computer memory storage and enhances the numerical computation efficiency with several orders without losing accuracy. As an example, we apply the algorithm to study the three-dimensional interacting electron gas under the renormalized-ring-diagram approximation where the Green's function needs to be self-consistently solved. We present the results for the chemical potential, compressibility, free energy, entropy, and specific heat of the system. The ground-state energy obtained by the present calculation is compared with the existing results of Monte Carlo simulation and random-phase approximation.

  12. In Situ Study of Phase Transformations during Non-Isothermal Tempering of Bainitic and Martensitic Microstructures

    Directory of Open Access Journals (Sweden)

    S. Hesamodin Talebi

    2017-09-01

    Full Text Available Phase transformations during non-isothermal tempering of bainitic or martensitic microstructures obtained after quenching of a medium-carbon low-alloy steel was studied. The microstructures correspond to different locations of an as-quenched large-sized forged ingot used as a die material in the automotive industry. High-resolution dilatometry experiments were conducted to simulate the heat treatment process, as well as to investigate different phenomena occurring during non-isothermal tempering. The microstructures were characterized using optical and scanning electron microscopy. Dilatometry analyses demonstrated that tempering behavior varied significantly from bainitic to martensitic microstructures. Retained austenite, which exists between bainitic ferrite sheaves, decomposes to lower bainite causing a remarkable volume increase. It was found that this decomposition finishes below 386 °C. By contrast, martensite tempering was accompanied with a volume decrease due to the decomposition of medium-carbon martensite to low carbon martensite and carbides.

  13. STM study on surface relief, ultra-fine structure and transformation mechanism of bainite in steels

    International Nuclear Information System (INIS)

    Fang, H.S.; Yang, Z.G.; Wang, J.J.; Zheng, Y.K.

    1995-01-01

    The surface reliefs accompanying lower bainite transformation in steels have been studied by scanning tunneling microscopy (STM). With the exclusive vertical resolution of STM, we observed that the surface relief associated with bainite is a group of surface reliefs related to subplates, subunits and sub-subunits. From the bainite plate to the sub-subunit in it, the reliefs are in a tent shape, not of invariant plane strain (IPS) type. The fine structure of bainite in a steel has also been shown by STM and TEM that bainite plate is composed of subplates, subunits and sub-subunits. On the basis of the fine structure inside a bainitic ferrite plate observed under STM, sympathetic-ledgewise mechanism of bainite formation is proposed. (orig.)

  14. Neutron diffraction study of the β1-β2 transformation in Ta2D

    International Nuclear Information System (INIS)

    Kaneko, H.; Kajitani, T.; Hirabayashi, M.

    1984-01-01

    The β 1 -β 2 phase transformation in Ta 2 D was studied by neutron diffraction using the pulsed source at the Tohoku Linac and the Intense Pulsed Neutron Source, Argonne National Laboratory. It was found that the hhO reflections almost disappear in the β 2 phase, whereas the 00l reflections are the same as those in the β 1 phase. The diffraction data show that the β 2 phase has an orthorhombic unit cell which is identical with that of the β 1 phase and contains four tantalum and two deuterium atoms in a volume which is approximately 2sup(1/2) X 1 X 2sup(1/2) that of the b.c.c. host lattice. The deuterium atoms fractionally occupy the tetrahedral sites in alternate (002)sub(orth) planes. (Auth.)

  15. Challenges and opportunities for genomic developmental neuropsychology: Examples from the Penn-Drexel collaborative battery

    Science.gov (United States)

    Gur, Ruben C.; Irani, Farzin; Seligman, Sarah; Calkins, Monica E.; Richard, Jan; Gur, Raquel E.

    2014-01-01

    Genomics has been revolutionizing medicine over the past decade by offering mechanistic insights into disease processes and harboring the age of “individualized medicine.” Because of the sheer number of measures generated by gene sequencing methods, genomics requires “Big Science” where large datasets on genes are analyzed in reference to electronic medical record data. This revolution has largely bypassed the behavioral neurosciences, mainly because of the paucity of behavioral data in medical records and the labor intensity of available neuropsychological assessment methods. We describe the development and implementation of an efficient neuroscience-based computerized battery, coupled with a computerized clinical assessment procedure. This assessment package has been applied to a genomic study of 10,000 children aged 8-21, of whom 1000 also undergo neuroimaging. Results from the first 3000 participants indicate sensitivity to neurodevelopmental trajectories. Sex differences were evident, with females outperforming males in memory and social cognition domains, while for spatial processing males were more accurate and faster, and they were faster on simple motor tasks. The study illustrates what will hopefully become a major component of the work of clinical and research neuropsychologists as invaluable participants in the dawning age of Big Science neuropsychological genomics. PMID:21902564

  16. Nodal kinetics model upgrade in the Penn State coupled TRAC/NEM codes

    International Nuclear Information System (INIS)

    Beam, Tara M.; Ivanov, Kostadin N.; Baratta, Anthony J.; Finnemann, Herbert

    1999-01-01

    The Pennsylvania State University currently maintains and does development and verification work for its own versions of the coupled three-dimensional kinetics/thermal-hydraulics codes TRAC-PF1/NEM and TRAC-BF1/NEM. The subject of this paper is nodal model enhancements in the above mentioned codes. Because of the numerous validation studies that have been performed on almost every aspect of these codes, this upgrade is done without a major code rewrite. The upgrade consists of four steps. The first two steps are designed to improve the accuracy of the kinetics model, based on the nodal expansion method. The polynomial expansion solution of 1D transverse integrated diffusion equation is replaced with a solution, which uses a semi-analytic expansion. Further the standard parabolic polynomial representation of the transverse leakage in the above 1D equations is replaced with an improved approximation. The last two steps of the upgrade address the code efficiency by improving the solution of the time-dependent NEM equations and implementing a multi-grid solver. These four improvements are implemented into the standalone NEM kinetics code. Verification of this code was accomplished based on the original verification studies. The results show that the new methods improve the accuracy and efficiency of the code. The verification of the upgraded NEM model in the TRAC-PF1/NEM and TRAC-BF1/NEM coupled codes is underway

  17. Analytical electron microscope study of the omega phase transformation in a zirconium--niobium alloy

    Energy Technology Data Exchange (ETDEWEB)

    Zaluzec, N.J.

    1979-06-01

    An in-situ study of the as-quenched omega phase transformation in Zr--15% Nb was conducted between the temperatures of 77 and 300/sup 0/K using analytical electron microscopy. The domain size of the omega regions observed in this investigation was on the order of 30 A, consistent with previous observations in this system. No alignment of omega domains along <222> directions of the bcc lattice was observed and in-situ thermal cycling experiments failed to produce a long period structure of alternating ..beta.. and ..omega.. phase regions as predicted by one theory of this transformation. Several techniques of microstructural analysis were developed, refined, and standardized. Grouped under the general classification of Analytical Electron Microscopy (AEM) they provide the experimentalist with a unique tool for the microcharacterization of solids, allowing semiquantitative to quantitative analysis of the morphology, crystallography, elemental composition, and electronic structure of regions as small as 20 A in diameter. These techniques have complications, and it was necessary to study the AEM system used in this work so that instrumental artifacts which invalidate the information produced in the microscope environment might be eliminated. Once these factors had been corrected, it was possible to obtain a wealth of information about the microvolume of material under investigation. The microanalytical techniques employed during this research include: energy dispersive x-ray spectroscopy (EDS) using both conventional and scanning transmission electron microscopy (CTEM, STEM), transmission scanning electron diffraction (TSED), the stationary diffraction pattern technique, and electron energy loss spectroscopy (ELS) using a dedicated scanning transmission electron microscope (DSTEM).

  18. Analytical electron microscope study of the omega phase transformation in a zirconium--niobium alloy

    International Nuclear Information System (INIS)

    Zaluzec, N.J.

    1979-06-01

    An in-situ study of the as-quenched omega phase transformation in Zr--15% Nb was conducted between the temperatures of 77 and 300 0 K using analytical electron microscopy. The domain size of the omega regions observed in this investigation was on the order of 30 A, consistent with previous observations in this system. No alignment of omega domains along directions of the bcc lattice was observed and in-situ thermal cycling experiments failed to produce a long period structure of alternating β and ω phase regions as predicted by one theory of this transformation. Several techniques of microstructural analysis were developed, refined, and standardized. Grouped under the general classification of Analytical Electron Microscopy (AEM) they provide the experimentalist with a unique tool for the microcharacterization of solids, allowing semiquantitative to quantitative analysis of the morphology, crystallography, elemental composition, and electronic structure of regions as small as 20 A in diameter. These techniques have complications, and it was necessary to study the AEM system used in this work so that instrumental artifacts which invalidate the information produced in the microscope environment might be eliminated. Once these factors had been corrected, it was possible to obtain a wealth of information about the microvolume of material under investigation. The microanalytical techniques employed during this research include: energy dispersive x-ray spectroscopy (EDS) using both conventional and scanning transmission electron microscopy (CTEM, STEM), transmission scanning electron diffraction (TSED), the stationary diffraction pattern technique, and electron energy loss spectroscopy (ELS) using a dedicated scanning transmission electron microscope

  19. Studies of transformational leadership in consumer service: leadership trust and the mediating-moderating role of cooperative conflict management.

    Science.gov (United States)

    Yang, Yi-Feng

    2012-02-01

    This is the third in a series of studies evaluating how transformational leadership is associated with related variables such as job satisfaction, change commitment, leadership trust, cooperative conflict management, and market orientation. The present paper evaluates the effects of transformational leadership and cooperative conflict management along with their mediating and moderating of leadership trust in the life insurance industry for two sample groups, sales managers and sales employees. The main effect of leadership trust was mediated and moderated by cooperative conflict management. Cooperative conflict management made a more important contribution than transformational leadership or the moderating effect (interaction), but these three together were the most important variables predicting highest leadership trust. Transformational leadership has an indirect influence on leadership trust. This work summarizes the specific contribution and importance of building successful leadership trust associations with employees in relation to leadership and satisfaction with change commitment.

  20. Martensitic transformation between competing phases in Ti–Ta alloys: a solid-state nudged elastic band study

    International Nuclear Information System (INIS)

    Chakraborty, Tanmoy; Rogal, Jutta; Drautz, Ralf

    2015-01-01

    A combined density functional theory and solid-state nudged elastic band study is presented to investigate the martensitic transformation between β → (α″, ω) phases in the Ti–Ta system. The minimum energy paths along the transformation are calculated and the transformation mechanisms as well as relative stabilities of the different phases are discussed for various compositions. The analysis of the transformation paths is complemented by calculations of phonon spectra to determine the dynamical stability of the β, α″, and ω phase. Our theoretical results confirm the experimental findings that with increasing Ta concentration there is a competition between the destabilisation of the α″ and ω phase and the stabilisation of the high-temperature β phase. (paper)

  1. Insomnia with short sleep duration and mortality: the Penn State cohort.

    Science.gov (United States)

    Vgontzas, Alexandros N; Liao, Duanping; Pejovic, Slobodanka; Calhoun, Susan; Karataraki, Maria; Basta, Maria; Fernández-Mendoza, Julio; Bixler, Edward O

    2010-09-01

    Because insomnia with objective short sleep duration is associated with increased morbidity, we examined the effects of this insomnia subtype on all-cause mortality. Longitudinal. Sleep laboratory. 1,741 men and women randomly selected from Central Pennsylvania. Participants were studied in the sleep laboratory and were followed-up for 14 years (men) and 10 years (women). "Insomnia" was defined by a complaint of insomnia with duration > or = 1 year. "Normal sleeping" was defined as absence of insomnia. Polysomnographic sleep duration was classified into two categories: the "normal sleep duration group" subjects who slept > or = 6 h and the "short sleep duration group" subjects who slept insomnia" group, (OR = 4.00, CI 1.14-13.99) after adjusting for diabetes, hypertension, and other confounders. Furthermore, there was a marginally significant trend (P = 0.15) towards higher mortality risk from insomnia and short sleep in patients with diabetes or hypertension (OR = 7.17, 95% CI 1.41-36.62) than in those without these comorbid conditions (OR = 1.45, 95% CI 0.13-16.14). In women, mortality was not associated with insomnia and short sleep duration. Insomnia with objective short sleep duration in men is associated with increased mortality, a risk that has been underestimated.

  2. Comparison of different spatial transformations applied to EEG data: A case study of error processing

    NARCIS (Netherlands)

    Cohen, M.X.

    2015-01-01

    The purpose of this paper is to compare the effects of different spatial transformations applied to the same scalp-recorded EEG data. The spatial transformations applied are two referencing schemes (average and linked earlobes), the surface Laplacian, and beamforming (a distributed source

  3. Transformative Leadership: A Reader. Counterpoints: Studies in the Postmodern Theory of Education. Volume 409

    Science.gov (United States)

    Shields, Carolyn M., Ed.

    2011-01-01

    This important, timely, and thought-provoking reader is a collection of original chapters by authors from five different countries, each of whom explores a facet of transformative leadership. Transformative leadership is fundamentally a critical approach to leadership that goes well beyond the tenets of most current leadership theories to focus on…

  4. Fundamental Studies on Phase Transformations and Mechanical Properties of Fusion Welds in Advanced Naval Steels

    Science.gov (United States)

    2017-07-31

    naval and structural applications. However, prior to this research project, a fundamental understanding of the phase transformation behavior under the...prior to this research project, a fundamental understanding of the phase transformation behavior under the high heating and cooling rates associated...HAZ mechanical properties. Such a treatment is expensive, time consuming , and cannot be practically applied to large structures. However, the absence

  5. Organic geochemical studies of the transformation of gymnospermous xylem during peatification and coalification to subbituminous coal

    Science.gov (United States)

    Hatcher, P.G.; Lerch, H. E.; Verheyen, T.V.

    1990-01-01

    It is generally recognized that xylem from trees that are buried in peat swamps is transformed first to huminite macerals in brown coal and then to vitrinite macerals in bituminous coal by processes collectively known as coalification. In order to understand the chemical nature of coalification of xylem and the chemical structures that eventually evolve in coal, we examined a series of gymnospermous xylem samples coalified to varying degrees. The samples included modern fresh xylem, modern degraded xylem in peat, and xylem coalified to ranks of brown coal (lignite B), lignite A, and subbituminous coal. The organic geochemical methods used in this study included solid-state 13C nuclear magnetic resonance (NMR) and pyrolysis/gas chromatography/mass spectrometry. The NMR method provided average compositional information, and the pyrolysis provided detailed molecular information. Although the samples examined include different plants of different geologic ages, they all share a common feature in that they are gymnospermous and presumably have or had a similar kind of lignin. The data obtained in this study provide enough details to allow delineation of specific coalification pathway for the xylem is microbial degradation in peat (peatification), leading to selective removal of cellulosic components. These components constitute a large fraction of the total mass of xylem, usually greater than 50%. Although cellulosic components can survive degradation under certain conditions, their loss during microbial degradation is the rule rather than exception during peatification. As these components of xylem are degraded and lost, lignin, another major component of xylem, is selectively enriched because it is more resistant to microbial degradation than the cellulosic components. Thus, lignin survives peatification in a practically unaltered state and becomes the major precursor of coalified xylem. During its transformation to brown coal and lignite A, lignin in xylem is altered

  6. A study on improvement of discharge characteristic by using a transformer in a capacitively coupled plasma

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Young-Cheol [Department of Nanoscale Semiconductor Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791 (Korea, Republic of); Kim, Hyun-Jun; Lee, Hyo-Chang; Chung, Chin-Wook, E-mail: joykang@hanyang.ac.kr [Department of Electrical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791 (Korea, Republic of)

    2015-12-15

    In a plasma discharge system, the power loss at powered line, matching network, and other transmission line can affect the discharge characteristics such as the power transfer efficiency, voltage and current at powered electrode, and plasma density. In this paper, we propose a method to reduce power loss by using a step down transformer mounted between the matching network and the powered electrode in a capacitively coupled argon plasma. This step down transformer decreases the power loss by reducing the current flowing through the matching network and transmission line. As a result, the power transfer efficiency was increased about 5%–10% by using a step down transformer. However, the plasma density was dramatically increased compared to no transformer. This can be understood by the increase in ohmic heating and the decrease in dc-self bias. By simply mounting a transformer, improvement of discharge efficiency can be achieved in capacitively coupled plasmas.

  7. Histological transformations of the dental pulp as possible indicator of post mortem interval: a pilot study.

    Science.gov (United States)

    Carrasco, Patricio A; Brizuela, Claudia I; Rodriguez, Ismael A; Muñoz, Samuel; Godoy, Marianela E; Inostroza, Carolina

    2017-10-01

    The correct estimation of the post mortem interval (PMI) can be crucial on the success of a forensic investigation. Diverse methods have been used to estimate PMI, considering physical changes that occur after death, such as mortis algor, livor mortis, among others. Degradation after death of dental pulp is a complex process that has not yet been studied thoroughly. It has been described that pulp RNA degradation could be an indicator of PMI, however this study is limited to 6 days. The tooth is the hardest organ of the human body, and within is confined dental pulp. The pulp morphology is defined as a lax conjunctive tissue with great sensory innervation, abundant microcirculation and great presence of groups of cell types. The aim of this study is to describe the potential use of pulp post mortem alterations to estimate PMI, using a new methodology that will allow obtainment of pulp tissue to be used for histomorphological analysis. The current study will identify potential histological indicators in dental pulp tissue to estimate PMI in time intervals of 24h, 1 month, 3 months and 6 months. This study used 26 teeth from individuals with known PMI of 24h, 1 month, 3 months or 6 months. All samples were manipulated with the new methodology (Carrasco, P. and Inostroza C. inventors; Universidad de los Andes, assignee. Forensic identification, post mortem interval estimation and cause of death determination by recovery of dental tissue. United State patent US 61/826,558 23.05.2013) to extract pulp tissue without the destruction of the tooth. The dental pulp tissues obtained were fixed in formalin for the subsequent generation of histological sections, stained with Hematoxylin Eosin and Masson's Trichrome. All sections were observed under an optical microscope using magnifications of 10× and 40×. The microscopic analysis of the samples showed a progressive transformation of the cellular components and fibers of dental pulp along PMI. These results allowed creating a

  8. Does self-efficacy mediate the relationship between transformational leadership behaviours and healthcare workers' sleep quality? A longitudinal study.

    Science.gov (United States)

    Munir, Fehmidah; Nielsen, Karina

    2009-09-01

    This paper is a report of a study conducted to investigate the longitudinal relationship between transformational leadership behaviours and employees' sleep quality, and the mediating effects of self-efficacy. Although there is evidence for the influential role of transformational leadership on health outcomes, researchers have used either attitude outcomes (e.g. job satisfaction) or softer health measures, such as general well-being. Specific measures of well-being such as sleep quality have not been used, despite its association with working conditions. A longitudinal design was used to collect data from Danish healthcare workers at time 1 in 2005 (n = 447) and 18 months later at time 2 in 2007 (n = 274). Structural equation modelling was used to investigate the relationships between transformational leadership, self-efficacy and sleep quality at both time points independently (cross-sectionally) and longitudinally. For all constructs, time 2 measures were influenced by the baseline level. Direct relationships between transformational leadership and sleep quality were found. This relationship was negative cross-sectionally at both time points, but positive between baseline and follow-up. The relationship between leadership and employees' sleep quality was not mediated by employees' self-efficacy. Our results indicate that training managers in transformational leadership behaviours may have a positive impact on healthcare workers' health over time. However, more research is needed to examine the mechanisms by which transformational leadership brings about improved sleep quality; self-efficacy was not found to be the explanation.

  9. Penn State Worry Questionnaire

    DEFF Research Database (Denmark)

    Esbjørn, Barbara Hoff; Reinholdt-Dunne, Marie Louise; Caspersen, Ida Dyhr

    2013-01-01

    Anxiety disorders are among the most prevalent psychiatric disturbances in childhood. Nonetheless, they often go unrecognized and untreated, which puts the child at risk for developing additional difficulties, such as academic difficulties, depression, and substance abuse. Further knowledge......¿=¿30) treated with cognitive behavioral therapy. Results from the community sample replicated previous findings supporting the strong psychometric properties of the PSWQ-C, and yielded Danish norms and clinical cut-offs for the measure. Clinically anxious children with a generalized anxiety disorder...

  10. Dual Transformer Model based on Standard Circuit Elements for the Study of Low- and Mid-frequency Transients

    Science.gov (United States)

    Jazebi, Saeed

    This thesis is a step forward toward achieving the final objective of creating a fully dual model for transformers including eddy currents and nonlinearities of the iron core using the fundamental electrical components already available in the EMTP-type programs. The model is effective for the study of the performance of transformers during power system transients. This is very important for transformer designers, because the insulation of transformers is determined with the overvoltages caused by lightning or switching operations. There are also internally induced transients that occur when a switch is actuated. For example switching actions for reconfiguration of distribution systems that offers economic advantages, or protective actions to clear faults and large short-circuit currents. Many of the smart grid concepts currently under development by many utilities rely heavily on switching to optimize resources that produce transients in the system. On the other hand, inrush currents produce mechanical forces which deform transformer windings and cause malfunction of the differential protection. Also, transformer performance under ferroresonance and geomagnetic induced currents are necessary to study. In this thesis, a physically consistent dual model applicable to single-phase two-winding transformers is proposed. First, the topology of a dual electrical equivalent circuit is obtained from the direct application of the principle of duality. Then, the model parameters are computed considering the variations of the transformer electromagnetic behavior under various operating conditions. Current modeling techniques use different topological models to represent diverse transient situations. The reversible model proposed in this thesis unifies the terminal and topological equivalent circuits. The model remains invariable for all low-frequency transients including deep saturation conditions driven from any of the two windings. The very high saturation region of the

  11. The Study of Thermal Comfort in Transforming Residential Area in Bandung using ENVI-met Software. Case Study: Progo Street

    Science.gov (United States)

    Aziz Soelaiman, Tubagus M.; Soedarsono, Woerjantari K.; Donny Koerniawan, M.

    2018-05-01

    Bandung has a high potential in attracting tourists. This potential impact on building function near tourist attraction that can transform residential uses into commercial uses. Progo Street and its surrounding area used as the case study, which is close to Gedung Sate and Riau Street as tourist destinations in Bandung. Moreover, this transformation is also reinforced by the spatial planning policies in Bandung, known as RTRW and RDTR, said that this area will be fully non-residential area. This condition in some cases could affect thermal comfort. This paper provides the changes of thermal comfort phenomenon that occurs using EnviMet software. The study compares Predicted Mean Voted (PMV) as thermal comfort indicator between existing and Bandung detailed spatial plan (RDTR) condition. The result shows that the PMV value of current condition is higher than future planning, nonetheless the planned area will be changed into higher non-residential buildings and less greeneries. Some environmental factors that are used to calculate PMV such as air temperature, mean radiant temperature, humidity, and wind speed are also examined to find out what makes the plan more comfortable than the existing. Simulations using ENVI-met software could be considered in making more objective planning policy in the future.

  12. Early Warning Signals of Social Transformation: A Case Study from the US Southwest.

    Directory of Open Access Journals (Sweden)

    Katherine A Spielmann

    Full Text Available Recent research in ecology suggests that generic indicators, referred to as early warning signals (EWS, may occur before significant transformations, both critical and non-critical, in complex systems. Up to this point, research on EWS has largely focused on simple models and controlled experiments in ecology and climate science. When humans are considered in these arenas they are invariably seen as external sources of disturbance or management. In this article we explore ways to include societal components of socio-ecological systems directly in EWS analysis. Given the growing archaeological literature on 'collapses,' or transformations, in social systems, we investigate whether any early warning signals are apparent in the archaeological records of the build-up to two contemporaneous cases of social transformation in the prehistoric US Southwest, Mesa Verde and Zuni. The social transformations in these two cases differ in scope and severity, thus allowing us to explore the contexts under which warning signals may (or may not emerge. In both cases our results show increasing variance in settlement size before the transformation, but increasing variance in social institutions only before the critical transformation in Mesa Verde. In the Zuni case, social institutions appear to have managed the process of significant social change. We conclude that variance is of broad relevance in anticipating social change, and the capacity of social institutions to mitigate transformation is critical to consider in EWS research on socio-ecological systems.

  13. Phase Transformation Study in Nb-Mo Microalloyed Steels Using Dilatometry and EBSD Quantification

    Science.gov (United States)

    Isasti, Nerea; Jorge-Badiola, Denis; Taheri, Mitra L.; Uranga, Pello

    2013-08-01

    A complete microstructural characterization and phase transformation analysis has been performed for several Nb and Nb-Mo microalloyed low-carbon steels using electron backscattered diffraction (EBSD) and dilatometry tests. Compression thermomechanical schedules were designed resulting in the undeformed and deformed austenite structures before final transformation. The effects of microalloying additions and accumulated deformation were analyzed after CCT diagram development and microstructural quantification. The resulting microstructures ranged from polygonal ferrite and pearlite at slow cooling ranges, to a combination of quasipolygonal ferrite and granular ferrite for intermediate cooling rates, and finally, to bainitic ferrite with martensite for fast cooling rates. The addition of Mo promotes a shift in the CCT diagrams to lower transformation start temperatures. When the amount of Nb is increased, CCT diagrams show little variations for transformations from the undeformed austenite and higher initial transformation temperatures in the transformations from the deformed austenite. This different behavior is due to the effect of niobium on strain accumulation in austenite and its subsequent acceleration of transformation kinetics. This article shows the complex interactions between chemical composition, deformation, and the phases formed, as well as their effect on microstructural unit sizes and homogeneity.

  14. Comparison of different spatial transformations applied to EEG data: A case study of error processing.

    Science.gov (United States)

    Cohen, Michael X

    2015-09-01

    The purpose of this paper is to compare the effects of different spatial transformations applied to the same scalp-recorded EEG data. The spatial transformations applied are two referencing schemes (average and linked earlobes), the surface Laplacian, and beamforming (a distributed source localization procedure). EEG data were collected during a speeded reaction time task that provided a comparison of activity between error vs. correct responses. Analyses focused on time-frequency power, frequency band-specific inter-electrode connectivity, and within-subject cross-trial correlations between EEG activity and reaction time. Time-frequency power analyses showed similar patterns of midfrontal delta-theta power for errors compared to correct responses across all spatial transformations. Beamforming additionally revealed error-related anterior and lateral prefrontal beta-band activity. Within-subject brain-behavior correlations showed similar patterns of results across the spatial transformations, with the correlations being the weakest after beamforming. The most striking difference among the spatial transformations was seen in connectivity analyses: linked earlobe reference produced weak inter-site connectivity that was attributable to volume conduction (zero phase lag), while the average reference and Laplacian produced more interpretable connectivity results. Beamforming did not reveal any significant condition modulations of connectivity. Overall, these analyses show that some findings are robust to spatial transformations, while other findings, particularly those involving cross-trial analyses or connectivity, are more sensitive and may depend on the use of appropriate spatial transformations. Copyright © 2014 Elsevier B.V. All rights reserved.

  15. STUDY REGARDING EFFICIENCY OF INDUCED GENETIC TRANSFORMATION IN BACILLUS LICHENIFORMIS WITH PLASMID DNA

    Directory of Open Access Journals (Sweden)

    VINTILĂ T.

    2007-01-01

    Full Text Available A strain of Bacillus licheniformis was subject to genetic transformation with plasmidvectors (pLC1 and pNC61, using electroporation technique, protoplasttransformation and bivalent cations (CaCl2 mediated transformation. In the case oftransformation by electroporation of Bacillus licheniformis B40, the highest numberof transformed colonies (3 were obtained only after a 1,79 KV electric shock, for 2,2milliseconds. Using this transformation technique we have obtained six kanamycinresistant transformants. The frequency of Bacillus licheniformis B40 protoplaststransformation using pLC1 and pNC61 plasmid vectors is approximately 10% (TF =10%. As a result of pLC1 plasmid integration in Bacillus licheniformis protoplasts,six kanamycin resistant transformants were obtained. The pNC61 plasmid, whichconfers trimethoprim resistance, does not integrate in receiver cells by protoplasttransformation. The direct genetic transformation in the presence of bivalent cations(CaCl2, mediated by pLC1 and pNC61 plasmid vectors, produce a lowtransformation frequency. Using this technique, we have obtained three trimethoprimresistant colonies and four kanamycin resistant colonies. The chemical way oftransformation is the only technique, which realizes the integration of pNC61 in B.licheniformis B40 cells.

  16. Early Warning Signals of Social Transformation: A Case Study from the US Southwest.

    Science.gov (United States)

    Spielmann, Katherine A; Peeples, Matthew A; Glowacki, Donna M; Dugmore, Andrew

    2016-01-01

    Recent research in ecology suggests that generic indicators, referred to as early warning signals (EWS), may occur before significant transformations, both critical and non-critical, in complex systems. Up to this point, research on EWS has largely focused on simple models and controlled experiments in ecology and climate science. When humans are considered in these arenas they are invariably seen as external sources of disturbance or management. In this article we explore ways to include societal components of socio-ecological systems directly in EWS analysis. Given the growing archaeological literature on 'collapses,' or transformations, in social systems, we investigate whether any early warning signals are apparent in the archaeological records of the build-up to two contemporaneous cases of social transformation in the prehistoric US Southwest, Mesa Verde and Zuni. The social transformations in these two cases differ in scope and severity, thus allowing us to explore the contexts under which warning signals may (or may not) emerge. In both cases our results show increasing variance in settlement size before the transformation, but increasing variance in social institutions only before the critical transformation in Mesa Verde. In the Zuni case, social institutions appear to have managed the process of significant social change. We conclude that variance is of broad relevance in anticipating social change, and the capacity of social institutions to mitigate transformation is critical to consider in EWS research on socio-ecological systems.

  17. A scoping study on energy-efficiency market transformation by California Utility DSM Programs

    Energy Technology Data Exchange (ETDEWEB)

    Eto, J.; Prahl, R.; Schlegel, J.

    1996-07-01

    Market transformation has emerged as a central policy objective for future publicly-funded energy-efficiency programs in California. California Public Utilities Commission (CPUC) Decision 95-12-063 calls for public funding to shift to activities designed to transform the energy-efficiency market. The CPUC envisions that funding {open_quotes}would only be needed for specific and limited periods of time to cause the market to be transformed{close_quotes}. At the same time, the CPUC also acknowledges that {open_quotes}there are many definitions of market transformation{close_quotes} ... and does {open_quotes}not attempt to refine those definitions today{close_quotes}. We argue that a definition of market transformation is essential. The literature is now replete with definitions, and an operational definition is needed for the CPUC to decide on which programs should be supported with public funds. The CPUC decision initially indicated a preference for programs that do not provide financial assistance 4-efficiency programs that rely on financial assistance to customers. However, energy customers have traditionally accounted for a substantial portion of California utility`s DSM programs, so the CPUC`s direction to use ratepayer funds to support programs that will transform the market raises critical questions about how to analyze what has happened in order to plan effectively for the future: Which utility energy-efficiency programs, including those that provide financial assistance to customers, have had market transforming effects? To what extent do current regulatory rules and practices encourage or discourage utilities from running programs that are designed to transform the market? Should the rules and programs be modified, and, if so, how, to promote market transformation?

  18. Physical transformations of iron oxide and silver nanoparticles from an intermediate scale field transport study

    Science.gov (United States)

    Emerson, Hilary P.; Hart, Ashley E.; Baldwin, Jonathon A.; Waterhouse, Tyler C.; Kitchens, Christopher L.; Mefford, O. Thompson; Powell, Brian A.

    2014-02-01

    In recent years, there has been increasing concern regarding the fate and transport of engineered nanoparticles (NPs) in environmental systems and the potential impacts on human and environmental health due to the exponential increase in commercial and industrial use worldwide. To date, there have been relatively few field-scale studies or laboratory-based studies on environmentally relevant soils examining the chemical/physical behavior of the NPs following release into natural systems. The objective of this research is to demonstrate the behavior and transformations of iron oxide and silver NPs with different capping ligands within the unsaturated zone. Here, we show that NP transport within the vadose zone is minimal primarily due to heteroaggregation with soil surface coatings with results that >99 % of the NPs remained within 5 cm of the original source after 1 year in intermediate-scale field lysimeters. These results suggest that transport may be overestimated when compared to previous laboratory-scale studies on pristine soils and pure minerals and that future work must incorporate more environmentally relevant parameters.

  19. Bainitic transformation behavior studied by simultaneous neutron diffraction and dilatometric measurement

    International Nuclear Information System (INIS)

    Koo, Minseo; Xu, Pingguang; Tomota, Yo; Suzuki, Hiroshi

    2009-01-01

    Bainitic transformation behavior has firstly been observed using in situ neutron diffraction with an angular dispersive method for a hard bainite steel. The dilatometric measurement was carried out simultaneously with the neutron experiment where changes in (1 1 1) austenite and (1 1 0) ferrite diffraction profiles were monitored during heating, cooling and holding at a transformation temperature. The neutron experiments results agree with dilatometry results. They appear to have found that the austenite peak broadening occurs after the onset of bainitic transformation but not before.

  20. Fourier transforms on Cantor sets: A study in non-Diophantine arithmetic and calculus

    International Nuclear Information System (INIS)

    Aerts, Diederik; Czachor, Marek; Kuna, Maciej

    2016-01-01

    Highlights: • Fractal arithmetic allows to define Fourier transforms on Cantor-like sets. • General construction is illustrated on the example of a sawtooth signal. • The formalism is much simpler than the approaches discussed so far in the literature. - Abstract: Fractals equipped with intrinsic arithmetic lead to a natural definition of differentiation, integration, and complex structure. Applying the formalism to the problem of a Fourier transform on fractals we show that the resulting transform has all the required basic properties. As an example we discuss a sawtooth signal on the ternary middle-third Cantor set. The formalism works also for fractals that are not self-similar.

  1. Study of 18-Pulse Rectifier Utilizing Hexagon Connected 3-Phase to 9-Phase Transformer

    Directory of Open Access Journals (Sweden)

    Ahmad Saudi Samosir

    2008-04-01

    Full Text Available The 18-pulse converter, using Y or -connected differential autotransformer, is very interesting since it allows natural high power factor correction. The lowest input current harmonic components are the 17th and 19th. The Transformer is designed to feed three six-pulse bridge rectifiers displaced in phase by 200. This paper present a high power factor three-phase rectifier bases on 3-phase to 9-phase transformer and 18-pulse rectifier. The 9-phase polygon-connected transformer followed by 18-pulse diode rectifiers ensures the fundamental concept of natural power factor correction. Simulation results to verify the proposed concept are shown in this paper.

  2. On New Families of Integrals in Analytical Studies of Superconductors within the Conformal Transformation Method

    Directory of Open Access Journals (Sweden)

    Ryszard Gonczarek

    2015-01-01

    Full Text Available We show that, by applying the conformal transformation method, strongly correlated superconducting systems can be discussed in terms of the Fermi liquid with a variable density of states function. Within this approach, it is possible to formulate and carry out purely analytical study based on a set of fundamental equations. After presenting the mathematical structure of the s-wave superconducting gap and other quantitative characteristics of superconductors, we evaluate and discuss integrals inherent in fundamental equations describing superconducting systems. The results presented here extend the approach formulated by Abrikosov and Maki, which was restricted to the first-order expansion. A few infinite families of integrals are derived and allow us to express the fundamental equations by means of analytical formulas. They can be then exploited in order to find quantitative characteristics of superconducting systems by the method of successive approximations. We show that the results can be applied in studies of high-Tc superconductors and other superconducting materials of the new generation.

  3. The use of N15 for studying the mechanism of transformation in the soil and plant

    International Nuclear Information System (INIS)

    Alchater, M.S.

    1995-01-01

    This research pertains to the study of the mechanism of transformation of added N 15 in the soil and plant in an attempt to determine the competition between microbial biomass and the plant for the use of N fertilizer in the form of (N 15 H 4)2 So 4. Additional amounts of barley straw were added as a source of energy. The study led to determining the real utilization coefficient of the canopy and the root system which amounted to 79% of N 15 added alone. Whereas it amounted to the treatments in which barley straw was added to N 15. Furthermore, there was a decrease in the amount of organic N 15 in the form of Gamma-amine as compared with other forms of organic N which also decreased to lesser degree. The results also indicated that the important N in the immobilization of nitrogen, as observed in previous field trials. Nitrogen balance and the contribution of soil N to plant nutrition were also calculated. 2 figs., 5 tabs

  4. Time-frequency analysis of phonocardiogram signals using wavelet transform: a comparative study.

    Science.gov (United States)

    Ergen, Burhan; Tatar, Yetkin; Gulcur, Halil Ozcan

    2012-01-01

    Analysis of phonocardiogram (PCG) signals provides a non-invasive means to determine the abnormalities caused by cardiovascular system pathology. In general, time-frequency representation (TFR) methods are used to study the PCG signal because it is one of the non-stationary bio-signals. The continuous wavelet transform (CWT) is especially suitable for the analysis of non-stationary signals and to obtain the TFR, due to its high resolution, both in time and in frequency and has recently become a favourite tool. It decomposes a signal in terms of elementary contributions called wavelets, which are shifted and dilated copies of a fixed mother wavelet function, and yields a joint TFR. Although the basic characteristics of the wavelets are similar, each type of the wavelets produces a different TFR. In this study, eight real types of the most known wavelets are examined on typical PCG signals indicating heart abnormalities in order to determine the best wavelet to obtain a reliable TFR. For this purpose, the wavelet energy and frequency spectrum estimations based on the CWT and the spectra of the chosen wavelets were compared with the energy distribution and the autoregressive frequency spectra in order to determine the most suitable wavelet. The results show that Morlet wavelet is the most reliable wavelet for the time-frequency analysis of PCG signals.

  5. VUV Fourier-transform absorption study of the Lyman and Werner bands in D2

    Science.gov (United States)

    de Lange, Arno; Dickenson, Gareth D.; Salumbides, Edcel J.; Ubachs, Wim; de Oliveira, Nelson; Joyeux, Denis; Nahon, Laurent

    2012-06-01

    An extensive survey of the D2 absorption spectrum has been performed with the high-resolution VUV Fourier-transform spectrometer employing synchrotron radiation. The frequency range of 90 000-119 000 cm-1 covers the full depth of the potential wells of the B sideset{^1}{+u}{Σ}, B^' } sideset{^1}{+u}{Σ}, and C 1Πu electronic states up to the D(1s) + D(2ℓ) dissociation limit. Improved level energies of rovibrational levels have been determined up to respectively v = 51, v = 13, and v = 20. Highest resolution is achieved by probing absorption in a molecular gas jet with slit geometry, as well as in a liquid helium cooled static gas cell, resulting in line widths of ≈0.35 cm-1. Extended calibration methods are employed to extract line positions of D2 lines at absolute accuracies of 0.03 cm-1. The D 1Πu and B^' ' } sideset{^1}{+u}{Σ} electronic states correlate with the D(1s) + D(3ℓ) dissociation limit, but support a few vibrational levels below the second dissociation limit, respectively, v = 0-3 and v = 0-1, and are also included in the presented study. The complete set of resulting level energies is the most comprehensive and accurate data set for D2. The observations are compared with previous studies, both experimental and theoretical.

  6. Alternative medicine in Paris and Rio de Janeiro: a study on transformative health experiences

    Directory of Open Access Journals (Sweden)

    Elisabeth Eglem

    2014-06-01

    Full Text Available The purpose of this paper is to explore the practice of alternative medicine as an experience capable of modifying the very perception of the body and body feeling, based in a two-field research in France (Paris and Brazil (Rio de Janeiro. In this research, the resort to alternative medicines was considered as urban practice and a possible response to emotional needs, beyond the curative specificities of these medicines. The two countries were chosen for their supposed complementarity concerning the perception of spirituality and therefore, the perception of holistic health concepts. The study relies on an inductive approach and a qualitative methodology: introspective interviews with consumers and professionals, as well as participant observations. After a review of the theoretical aspects on the subject — concepts related to health, alternative medicine, transformative experience —, empirical results are presented. They show that the experience of alternative medicine tends to modify body perception, understood as how individuals define their own body. It also tends to modify body internal feeling, literally how people feel their body. The second conclusion that can be drawn from our study is that, beyond cultural specificities, some similarities appear in the way the practice of alternative medicine impacts on body perception and individual values. In that sense, alternative medicine practices in big urban centers appear to be related to a global consumer culture. However, alternative health behaviors rely on a subjective quest of sense which can be expressed through a variety of practices related to better health, not necessarily involving consumption.

  7. Spectroscopic and DFT Study of RhIII Chloro Complex Transformation in Alkaline Solutions.

    Science.gov (United States)

    Vasilchenko, Danila B; Berdyugin, Semen N; Korenev, Sergey V; O'Kennedy, Sean; Gerber, Wilhelmus J

    2017-09-05

    The hydrolysis of [RhCl 6 ] 3- in NaOH-water solutions was studied by spectrophotometric methods. The reaction proceeds via successive substitution of chloride with hydroxide to quantitatively form [Rh(OH) 6 ] 3- . Ligand substitution kinetics was studied in an aqueous 0.434-1.085 M NaOH matrix in the temperature range 5.5-15.3 °C. Transformation of [RhCl 6 ] 3- into [RhCl 5 (OH)] 3- was found to be the rate-determining step with activation parameters of ΔH † = 105 ± 4 kJ mol -1 and ΔS † = 59 ± 10 J K -1 mol -1 . The coordinated hydroxo ligand(s) induces rapid ligand substitution to form [Rh(OH) 6 ] 3- . By simulating ligand substitution as a dissociative mechanism, using density functional theory (DFT), we can now explain the relatively fast and slow kinetics of chloride substitution in basic and acidic matrices, respectively. Moreover, the DFT calculated activation energies corroborated experimental data that the kinetic stereochemical sequence of [RhCl 6 ] 3- hydrolysis in an acidic solution proceeds as [RhCl 6 ] 3- → [RhCl 5 (H 2 O)] 2- → cis-[RhCl 4 (H 2 O) 2 ] - . However, DFT calculations predict in a basic solution the trans route of substitution [RhCl 6 ] 3- → [RhCl 5 (OH)] 3- → trans-[RhCl 4 (OH) 2 ] 3- is kinetically favored.

  8. Quantum-chemical study of hydride transfer in catalytic transformation of paraffins on zeolites

    NARCIS (Netherlands)

    Kazansky, V.B.; Frash, M.V.; Santen, van R.A.; Chon, H.; Ihm, S.-K.; Uh, Y.S.

    1997-01-01

    Ab initio quantum-chemical cluster calculations demonstrate that the activated complexes of hydride transfer reaction in catalytic transformation of paraffins on zeolites very much resembles adsorbed nonclassical carbonium ions. The calculated activation energies for reactions involving propane and

  9. The impact of photovoltaic systems on distribution transformer: A case study

    International Nuclear Information System (INIS)

    Jimenez, Humberto; Calleja, Hugo; Gonzalez, Raul; Huacuz, Jorge; Lagunas, Javier

    2006-01-01

    In this paper, the results obtained after monitoring a distribution transformer during an 18 months period are described and discussed. The transformer fed several households, each with a grid connected photovoltaic system, and it was found that the power factor at the transformer attained unusually low levels. This was due to the fact that under some conditions, the systems provided a large portion of the active power demanded by the households, while the grid supplied all the reactive and distortion powers. The operating temperature was used as an indicator of the stress on the transformer. The temperature was at its lowest when the systems were providing the maximum energy available from the solar cells

  10. Neutron scattering study of the phase transformation of LaNi3 induced by hydriding

    International Nuclear Information System (INIS)

    Ruan Jinghui; Zeng Xiangxin; Niu Shiwen

    1994-01-01

    The phase transformation of LaNi 3 induced by hydriding and de-hydriding is investigated using the neutron diffraction and the neutron inelastic scattering. The results show that the hydriding sample, LaNi 3 H x , is transformed from crystalline state of the LaNi 3 into amorphous state with a microcrystalline characteristic of LaNi 5 , and the de-hydriding sample produced by LaNi 3 H x dehydrated at 600 degree C is decomposed into new crystalline states composed by LaNi 5 -and La-hydrides. The procedure of phase transformation is that the result of the transformation of LaNi 3 induced by hydriding shows the properties of LaNi 5 -H 2 system

  11. The Method of Measured Electrical Resistivity in Studying Phase Transformations in Zr1Nb Alloy

    International Nuclear Information System (INIS)

    Gritsina, V.M.; Klimenko, S.P.; Chernyaeva, T.P.

    2006-01-01

    The paper systematically arranges and analyzes the data on the methods of research into α ↔ β transformation process in zirconium alloys, as well as capabilities and information provided by each method. A special emphasis is put on the method of measured electrical resistivity. The authors also present the results of their own research into α ↔ β transformation process in Zr1Nb alloy (in the material of Zr+1% Nb tubing produced in Ukraine from calciothermal zirconium). The ρ →T curve was used to define the maximum and minimum values for transformation temperatures. Combined processing of the phase data on Zr+1% Nb found in literature and obtained from measured resistivity suggests that transformation process happens in several stages. The maximum value on the ρ → T curve corresponds to the beginning of stage 3, whereas the minimum - to its completion; as suggested by the pooled data, accounts for over 95% of the total volume of the material

  12. How Does Environmental Regulation Affect Industrial Transformation? A Study Based on the Methodology of Policy Simulation

    Directory of Open Access Journals (Sweden)

    Wei Liu

    2016-01-01

    Full Text Available The difference of factor input structure determines different response to environmental regulation. This paper constructs a theoretical model including environmental regulation, factor input structure, and industrial transformation and conducts a policy simulation based on the difference of influencing mechanism of environmental regulation considering industrial heterogeneity. The findings show that the impact of environmental regulation on industrial transformation presents comparison of distortion effect of resource allocation and technology effect. Environmental regulation will promote industrial transformation when technology effect of environmental regulation is stronger than distortion effect of resource allocation. Particularly, command-control environmental regulation has a significant incentive effect and spillover effect of technological innovation on cleaning industries, but these effects do not exist in pollution-intensive industries. Command-control environmental regulation promotes industrial transformation. The result of simulation showed that environmental regulation of market incentives is similar to that of command-control.

  13. Army transformation leadership a study of core competencies for civilian leadership

    OpenAIRE

    Taylor, Vickie.

    2006-01-01

    The U. S. Army is undergoing a substantial departure from its historical underpinnings to adapt and succeed in the emerging arena of asymmetric warfare-i.e., migrating from a traditional 'heavy' approach to an agile and responsive capability. Changes are not limited to equipment and doctrine, but are pervasive throughout all aspects of infrastructure and processes, including leadership. Army Transformation is outlined by the Department of Defense (DoD) April 2003 Transformation Planning Guid...

  14. Electronic Data Safes as an Infrastructure for Transformational Government? A Case Study

    OpenAIRE

    Pfister, Joachim; Schwabe, Gerhard

    2015-01-01

    Part 3: Services, Processes and Infrastructure; International audience; This article introduces and explores the potential of an active electronic data safe (AEDS) serving as an infrastructure to achieve transformational government. An AEDS connects individuals and organizations from the private and the public sector to exchange information items related to business processes following the user-managed access paradigm. To realize the transformational government’s vision of user-centricity, fu...

  15. Models of Transformative Learning for Social Justice: Comparative Case Studies of Non-Formal Development Education in Britain and Spain

    Science.gov (United States)

    Brown, Eleanor J.

    2015-01-01

    This paper presents comparative case studies of non-formal development education by non-profit organisations in two European countries. The study aimed to explore the extent to which such activities provide opportunities for transformative learning. The research was qualitative and began with interviews with educators across 14 organisations in…

  16. A real time study on condition monitoring of distribution transformer using thermal imager

    Science.gov (United States)

    Mariprasath, T.; Kirubakaran, V.

    2018-05-01

    The transformer is one of the critical apparatus in the power system. At any cost, a few minutes of outages harshly influence the power system. Hence, prevention-based maintenance technique is very essential. The continuous conditioning and monitoring technology significantly increases the life span of the transformer, as well as reduces the maintenance cost. Hence, conditioning and monitoring of transformer's temperature are very essential. In this paper, a critical review has been made on various conditioning and monitoring techniques. Furthermore, a new method, hot spot indication technique, is discussed. Also, transformer's operating condition is monitored by using thermal imager. From the thermal analysis, it is inferred that major hotspot locations are appearing at connection lead out; also, the bushing of the transformer is the very hottest spot in transformer, so monitoring the level of oil is essential. Alongside, real time power quality analysis has been carried out using the power analyzer. It shows that industrial drives are injecting current harmonics to the distribution network, which causes the power quality problem on the grid. Moreover, the current harmonic limit has exceeded the IEEE standard limit. Hence, the adequate harmonics suppression technique is need an hour.

  17. [Study of the phase transformation of TiO2 with in-situ XRD in different gas].

    Science.gov (United States)

    Ma, Li-Jing; Guo, Lie-Jin

    2011-04-01

    TiO2 sample was prepared by sol-gel method from chloride titanium. The phase transformation of the prepared TiO2 sample was studied by in-situ XRD and normal XRD in different gas. The experimental results showed that the phase transformation temperatures of TiO2 were different under in-situ or normal XRD in different kinds of gas. The transformation of amorphous TiO2 to anatase was controlled by kinetics before 500 degrees C. In-situ XRD showed that the growth of anatase was inhibited, but the transformation of anatase to rutile was accelerated under inactive nitrogen in contrast to air. Also better crystal was obtained under hydrogen than in argon. These all showed that external oxygen might accelerate the growth of TiO2, but reduced gas might partly counteract the negative influence of lack of external oxygen. The mechanism of phase transformation of TiO2 was studied by in-situ XRD in order to control the structure in situ.

  18. COORDINATE TRANSFORMATION USING FEATHERSTONE AND VANÍČEK PROPOSED APPROACH - A CASE STUDY OF GHANA GEODETIC REFERENCE NETWORK

    Directory of Open Access Journals (Sweden)

    Yao Yevenyo Ziggah

    2017-03-01

    Full Text Available Most developing countries like Ghana are yet to adopt the geocentric datum for its surveying and mapping purposes. It is well known and documented that non-geocentric datums based on its establishment have more distortions in height compared with satellite datums. Most authors have argued that combining such height with horizontal positions (latitude and longitude in the transformation process could introduce unwanted distortions to the network. This is because the local geodetic height in most cases is assumed to be determined to a lower accuracy compared with the horizontal positions. In the light of this, a transformation model was proposed by Featherstone and Vaníček (1999 which avoids the use of height in both global and local datums in coordinate transformation. It was confirmed that adopting such a method reduces the effect of distortions caused by geodetic height on the transformation parameters estimated. Therefore, this paper applied Featherstone and Vaníček (FV model for the first time to a set of common points coordinates in Ghana geodetic reference network. The FV model was used to transform coordinates from global datum (WGS84 to local datum (Accra datum. The results obtained based on the Root Mean Square Error (RMSE and Mean Absolute Error (MAE in both Eastings and Northings were satisfactory. Thus, a RMSE value of 0.66 m and 0.96 m were obtained for the Eastings and Northings while 0.76 m and 0.73 m were the MAE values achieved. Also, the FV model attained a transformation accuracy of 0.49 m. Hence, this study will serve as a preliminary investigation in avoiding the use of height in coordinate transformation within Ghana’s geodetic reference network.

  19. Nitrogen transformations and greenhouse gas emissions from a riparian wetland soil: An undisturbed soil column study

    Energy Technology Data Exchange (ETDEWEB)

    Munoz-Leoz, Borja [Department of Chemical and Environmental Engineering, University of the Basque Country, UPV/EHU, E-48013 Bilbao (Spain); Antigueedad, Inaki [Department of Geodynamic, University of the Basque Country, UPV/EHU, E-48940 Leioa (Spain); Garbisu, Carlos [Department of Ecosystems, NEIKER-Tecnalia, E-48160 Derio (Spain); Ruiz-Romera, Estilita, E-mail: estilita.ruiz@ehu.es [Department of Chemical and Environmental Engineering, University of the Basque Country, UPV/EHU, E-48013 Bilbao (Spain)

    2011-01-15

    Riparian wetlands bordering intensively managed agricultural fields can act as biological filters that retain and transform agrochemicals such as nitrate and pesticides. Nitrate removal in wetlands has usually been attributed to denitrification processes which in turn imply the production of greenhouse gases (CO{sub 2} and N{sub 2}O). Denitrification processes were studied in the Salburua wetland (northern Spain) by using undisturbed soil columns which were subsequently divided into three sections corresponding to A-, Bg- and B2g-soil horizons. Soil horizons were subjected to leaching with a 200 mg NO{sub 3}{sup -} L{sup -1} solution (rate: 90 mL day{sup -1}) for 125 days at two different temperatures (10 and 20 {sup o}C), using a new experimental design for leaching assays which enabled not only to evaluate leachate composition but also to measure gas emissions during the leaching process. Column leachate samples were analyzed for NO{sub 3}{sup -} concentration, NH{sub 4}{sup +} concentration, and dissolved organic carbon. Emissions of greenhouse gases (CO{sub 2} and N{sub 2}O) were determined in the undisturbed soil columns. The A horizon at 20 {sup o}C showed the highest rates of NO{sub 3}{sup -} removal (1.56 mg N-NO{sub 3}{sup -} kg{sup -1} DW soil day{sup -1}) and CO{sub 2} and N{sub 2}O production (5.89 mg CO{sub 2} kg{sup -1} DW soil day{sup -1} and 55.71 {mu}g N-N{sub 2}O kg{sup -1} DW soil day{sup -1}). For the Salburua wetland riparian soil, we estimated a potential nitrate removal capacity of 1012 kg N-NO{sub 3}{sup -} ha{sup -1} year{sup -1}, and potential greenhouse gas emissions of 5620 kg CO{sub 2} ha{sup -1} year{sup -1} and 240 kg N-N{sub 2}O ha{sup -1} year{sup -1}. - Research Highlights: {yields}A new experimental design is proposed for leaching assays to simulate nitrogen transformations in riparian wetland soil. {yields}Denitrification is the main process responsible for nitrate removal in the riparian zone of Salburua wetland. {yields

  20. What ears do for bats: a comparative study of pinna sound pressure transformation in chiroptera.

    Science.gov (United States)

    Obrist, M K; Fenton, M B; Eger, J L; Schlegel, P A

    1993-07-01

    Using a moveable loudspeaker and an implanted microphone, we studied the sound pressure transformation of the external ears of 47 species of bats from 13 families. We compared pinna gain, directionality of hearing and interaural intensity differences (IID) in echolocating and non-echolocating bats, in species using different echolocation strategies and in species that depend upon prey-generated sounds to locate their targets. In the Pteropodidae, two echolocating species had slightly higher directionality than a non-echolocating species. The ears of phyllostomid and vespertilionid species showed moderate directionality. In the Mormoopidae, the ear directionality of Pteronotus parnellii clearly matched the dominant spectral component of its echolocation calls, unlike the situation in three other species. Species in the Emballonuridae, Molossidae, Rhinopomatidae and two vespertilionids that use narrow-band search-phase echolocation calls showed increasingly sharp tuning of the pinna to the main frequency of their signals. Similar tuning was most evident in Hipposideridae and Rhinolophidae, species specialized for flutter detection via Doppler-shifted echoes of high-duty-cycle narrow-band signals. The large pinnae of bats that use prey-generated sounds to find their targets supply high sound pressure gain at lower frequencies. Increasing domination of a narrow spectral band in echolocation is reflected in the passive acoustic properties of the external ears (sharper directionality). The importance of IIDs for lateralization and horizontal localization is discussed by comparing the behavioural directional performance of bats with their bioacoustical features.

  1. Ultrasonic spectroscopy study into the nature of a high-temperature phase transformation in V203

    International Nuclear Information System (INIS)

    Andrianov, G.O.; Drichko, I.L.; Lakhtman, B.D.

    1978-01-01

    The velocity of longitudinal sound wave propagation in V 2 O 3 vanadium sesquioxide was studied in the temperature range of 250-550 K in a wide range of ultrasound frequencies from 70 to 1500 MHz. The investigation was carried out in order to obtain the dynamic characteristics of the transition and to define the nature of high-temperature anomalies in V 2 O 3 . The sound velocity dispersion was observed. The frequency dependence of the sound velocity can be adequately described by the Mandelstam-Leontovich formula. Values and temperature dependences of tau, Vsub(infinity) and (Vsub(infinity)-Vsub(0)/Vsub(infinity) were calculated where tau is the relaxation time; Vsub(0), Vsub(infinity) are the values of velocitiea when ω→0 and ω→infinity respectively. The acoustic anomalies in the temperature range under investigation are shown to be well described qualitatively by the overlapping zone model. A deep maximum in the sound velocity at T=520 K can be explained by fluctuations in the neighbourhood of the magnetic phase transformation

  2. [A study of Boletus bicolor from different areas using Fourier transform infrared spectrometry].

    Science.gov (United States)

    Zhou, Zai-Jin; Liu, Gang; Ren, Xian-Pei

    2010-04-01

    It is hard to differentiate the same species of wild growing mushrooms from different areas by macromorphological features. In this paper, Fourier transform infrared (FTIR) spectroscopy combined with principal component analysis was used to identify 58 samples of boletus bicolor from five different areas. Based on the fingerprint infrared spectrum of boletus bicolor samples, principal component analysis was conducted on 58 boletus bicolor spectra in the range of 1 350-750 cm(-1) using the statistical software SPSS 13.0. According to the result, the accumulated contributing ratio of the first three principal components accounts for 88.87%. They included almost all the information of samples. The two-dimensional projection plot using first and second principal component is a satisfactory clustering effect for the classification and discrimination of boletus bicolor. All boletus bicolor samples were divided into five groups with a classification accuracy of 98.3%. The study demonstrated that wild growing boletus bicolor at species level from different areas can be identified by FTIR spectra combined with principal components analysis.

  3. Raman spectroscopic study of calcite III to aragonite transformation under high pressure and high temperature

    Science.gov (United States)

    Liu, Chuanjiang; Zheng, Haifei; Wang, Duojun

    2017-10-01

    In our study, a series of Raman experiments on the phase transition of calcite at high pressure and high temperature were investigated using a hydrothermal diamond anvil cell and Raman spectroscopy technique. It was found that calcite I transformed to calcite II and calcite III at pressures of 1.62 and 2.12 GPa and room temperature. With increasing temperature, the phase transition of calcite III to aragonite occurred. Aragonite was retained upon slowly cooling of the system, indicating that the transition of calcite III to aragonite was irreversible. Based on the available data, the phase boundary between calcite III and aragonite was determined by the following relation: P(GPa) = 0.013 × T(°C) + 1.22 (100°C ≤ T ≤ 170°C). It showed that the transition pressure linearly rose with increasing temperature. A better understanding of the stability of calcite III and aragonite is of great importance to further explore the thermodynamic behavior of carbonates and carbon cycling in the mantle.

  4. X-ray spectroscopic studies of uranium transformations in microbial cultures

    International Nuclear Information System (INIS)

    Dodge, C.J.; Francis, A.J.; Clayton, C.R.

    1995-01-01

    Microbial transformations of uranyl nitrate, U:citric acid, and mixed metal U:Fe:citric acid complex were investigated. X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge structure (XANES) analyses showed that soluble U 6+ was reduced to insoluble U 4+ by Clostridium sp. and was associated with the bacterial surface, whereas U 3+ was observed within the biomass. Uranium forms a binuclear complex with citric acid involving two carboxylic acid groups and the hydroxyl group. Biodegradation studies of U:citric acid and U:Fe:citric acid complexes using Pseudomonas fluorescens showed they were recalcitrant. The lack of biodegradation was due to the nature of the metal-citrate complex species and not due to toxicity. Characterization of the mixed metal U:Fe:citric acid complex by extended X-ray absorption fine structure (EXAFS) indicated that Fe was associated with the U and citric acid, resulting in formation of a bionuclear mixed metal citrate complex

  5. Understanding metastable phase transformation during crystallization of RDX, HMX and CL-20: experimental and DFT studies.

    Science.gov (United States)

    Ghosh, Mrinal; Banerjee, Shaibal; Shafeeuulla Khan, Md Abdul; Sikder, Nirmala; Sikder, Arun Kanti

    2016-09-14

    Multiphase growth during crystallization severely affects deliverable output of explosive materials. Appearance and incomplete transformation of metastable phases are a major source of polymorphic impurities. This article presents a methodical and molecular level understanding of the metastable phase transformation mechanism during crystallization of cyclic nitramine explosives, viz. RDX, HMX and CL-20. Instantaneous reverse precipitation yielded metastable γ-HMX and β-CL-20 which undergo solution mediated transformation to the respective thermodynamic forms, β-HMX and ε-CL-20, following 'Ostwald's rule of stages'. However, no metastable phase, anticipated as β-RDX, was evidenced during precipitation of RDX, which rather directly yielded the thermodynamically stable α-phase. The γ→β-HMX and β→ε-CL-20 transformations took 20 and 60 minutes respectively, whereas formation of α-RDX was instantaneous. Density functional calculations were employed to identify the possible transition state conformations and to obtain activation barriers for transformations at wB97XD/6-311++G(d,p)(IEFPCM)//B3LYP/6-311G(d,p) level of theory. The computed activation barriers and lattice energies responsible for transformation of RDX, HMX and CL-20 metastable phases to thermodynamic ones conspicuously supported the experimentally observed order of phase stability. This precise result facilitated an understanding of the occurrence of a relatively more sensitive and less dense β-CL-20 phase in TNT based melt-cast explosive compositions, a persistent and critical problem unanswered in the literature. The crystalline material recovered from such compositions revealed a mixture of β- and ε-CL-20. However, similar compositions of RDX and HMX never showed any metastable phase. The relatively long stability with the highest activation barrier is believed to restrict complete β→ε-CL-20 transformation during processing. Therefore a method is suggested to overcome this issue.

  6. Transformation of Nuclear Malaysia into Research and Development Organisation and Technical Support Organisation (TSO++): Restructuring Study

    International Nuclear Information System (INIS)

    Muhd Noor Muhd Yunus; Ariff Shah Ismail; Prak Tom, P.P.

    2011-01-01

    Malaysian Nuclear Agency (Nuklear Malaysia), formerly known as Malaysian Institute for Nuclear Technology Research (MINT) was established on September 1972. As an agency under the purview of Ministry of Science, Technology and Innovation (MOSTI), Nuklear Malaysia has a role to introduce and promote the application of nuclear science and technology for national development. Besides that, Nuklear Malaysia plays important role in providing quality and best-in-class research towards comprehensively generating new technologies in nuclear field. For the past few years, the government has been studying the possibility of deploying nuclear energy for electricity generation. On 11th January 2011, Y.A.B Prime Minister announced the establishment of Malaysian Nuclear Power Cooperation (MNPC) that is responsible to plan, spearhead and coordinate the implementation of nuclear energy development program for Malaysia and to take the necessary action to realize the development of the first nuclear power plant (NPP) in Malaysia. This is a strong and significant indication that Malaysia is seriously considering to embark into nuclear power program. As an agency that has been involve in nuclear field for the past few decades, Nuklear Malaysia has been identified as Technical Support Organisation (TSO) for the NPP project. Since then, preparation for transforming Nuklear Malaysia into TSO has been started. One of the areas that have been studied is the preparedness of organizations structure to effectively uphold the responsibilities of TSO. This paper briefly describes attributes of TSO, example of effective TSO organizations and study that has been conducted in preparation of Nuklear Malaysia to be Research and Development and Technical Support Organization (TSO++). (author)

  7. Study of tissue engineered bone nodules by Fourier transform infrared spectroscopy.

    Science.gov (United States)

    Aydin, Halil Murat; Hu, Bin; Suso, Josep Sulé; El Haj, Alicia; Yang, Ying

    2011-02-21

    The key criteria for assessing the success of bone tissue engineering are the quality and quantity of the produced minerals within the cultured constructs. The accumulation of calcium ions and inorganic phosphates in culture medium serves as nucleating agents for the formation of hydroxyapatite, which is the main inorganic component of bone. Bone nodule formation is one of the hallmarks of mineralization in such cell cultures. In this study, we developed a new two-step procedure to accelerate bone formation in which mouse bone cell aggregates were produced first on various chemically treated non-adhesive substrates. After this step, the bone cells' growth and mineralization were followed in conventional culture plates. The number and size of cell aggregates were studied with light microscopy. The minerals' formation in the form of nodules produced by the cell aggregates and the bone crystal quality were studied with Fourier Transform Infrared (FTIR) spectroscopy. The FTIR spectra of the ash specimens (mineral phase only) from thermal gravimetric analysis (TGA) provided valuable information of the quality of the minerals. The υ(4) PO(4) region (550-650 cm(-1)), which reveals apatitic and non-apatitic HPO(4) or PO(4) environments, and phosphate region (910-1180 cm(-1)) were examined for the minerals produced in the form of nodules. The peak position and intensity of the spectra demonstrate that the quality of the bone produced by cell aggregates, especially from the bigger ones, which were formed on Plunoric treated substrates, exhibit a composition more similar to that of native bone. This work establishes a new protocol for high quality bone formation and characterization, with the potential to be applied to bone tissue engineering.

  8. Determination of aluminium induced metabolic changes in mice liver: a Fourier transform infrared spectroscopy study.

    Science.gov (United States)

    Sivakumar, S; Sivasubramanian, J; Khatiwada, Chandra Prasad; Manivannan, J; Raja, B

    2013-06-01

    In this study, we made a new approach to evaluate aluminium induced metabolic changes in liver tissue of mice using Fourier transform infrared spectroscopy analysis taking one step further in correlation with strong biochemical evidence. This finding reveals the alterations on the major biochemical constituents, such as lipids, proteins, nucleic acids and glycogen of the liver tissues of mice. The peak area value of amide A significantly decrease from 288.278±3.121 to 189.872±2.012 between control and aluminium treated liver tissue respectively. Amide I and amide II peak area value also decrease from 40.749±2.052 to 21.170±1.311 and 13.167±1.441 to 8.953±0.548 in aluminium treated liver tissue respectively. This result suggests an alteration in the protein profile. The absence of olefinicCH stretching band and CO stretching of triglycerides in aluminium treated liver suggests an altered lipid levels due to aluminium exposure. Significant shift in the peak position of glycogen may be the interruption of aluminium in the calcium metabolism and the reduced level of calcium. The overall findings exhibit that the liver metabolic program is altered through increasing the structural modification in proteins, triglycerides and quantitative alteration in proteins, lipids, and glycogen. All the above mentioned modifications were protected in desferrioxamine treated mice. Histopathological results also revealed impairment of aluminium induced alterations in liver tissue. The results of the FTIR study were found to be in agreement with biochemical studies and which demonstrate FTIR can be used successfully to indicate the molecular level changes. Copyright © 2013 Elsevier B.V. All rights reserved.

  9. Use of in situ FT-Raman spectroscopy to study the kinetics of the transformation of carbamazepine polymorphs.

    Science.gov (United States)

    O'Brien, Laura E; Timmins, Peter; Williams, Adrian C; York, Peter

    2004-10-29

    The solid-state transformation of carbamazepine from form III to form I was examined by Fourier Transform Raman spectroscopy. Using a novel environmental chamber, the isothermal conversion was monitored in situ at 130 degrees C, 138 degrees C, 140 degrees C and 150 degrees C. The rate of transformation was monitored by taking the relative intensities of peaks arising from two CH bending modes; this approach minimised errors due to thermal artefacts and variations in power intensities or scattering efficiencies from the samples in which crystal habit changed from a characteristic prism morphology (form III) to whiskers (form I). The solid-state transformation at the different temperatures was fitted to various solid-state kinetic models of which four gave good fits, thus indicating the complexity of the process which is known to occur via a solid-gas-solid mechanism. Arrhenius plots from the kinetic models yielded activation energies from 344 kJ mol(-1) to 368 kJ mol(-1) for the transformation. The study demonstrates the value of a rapid in situ analysis of drug polymorphic type which can be of value for at-line in-process control.

  10. In situ ESEM study of the thermal decomposition of chrysotile asbestos in view of safe recycling of the transformation product

    International Nuclear Information System (INIS)

    Gualtieri, Alessandro F.; Gualtieri, Magdalena Lassinantti; Tonelli, Massimo

    2008-01-01

    The thermal transformation of asbestos into non-hazardous crystalline phases and their recycling is a promising solution for the 'asbestos problem'. The most common asbestos-containing industrial material produced worldwide is cement-asbestos. Knowledge of the kinetics of thermal transformation of asbestos fibers in cement-asbestos is of paramount importance for the optimization of the firing process at industrial scale. Here, environmental scanning electron microscopy (ESEM) was used for the first time to follow in situ the thermal transformation of chrysotile fibers present in cement-asbestos. It was found that the reaction kinetics of thermal transformation of chrysotile was highly slowed down in the presence of water vapor in the experimental chamber with respect to He. This was explained by chemisorbed water on the surface of the fibers which affected the dehydroxylation reaction and consequently the recrystallization into Mg-silicates. In the attempt to investigate alternative and faster firing routes for the decomposition of asbestos, a low melting glass was mixed with cement-asbestos and studied in situ to assess to which extent the decomposition of asbestos is favored. It was found that the addition of a low melting glass to cement-asbestos greatly improved the decomposition reaction and decreased the transformation temperatures

  11. Evaluating Pillar Industry’s Transformation Capability: A Case Study of Two Chinese Steel-Based Cities

    Science.gov (United States)

    Li, Zhidong; Marinova, Dora; Guo, Xiumei; Gao, Yuan

    2015-01-01

    Many steel-based cities in China were established between the 1950s and 1960s. After more than half a century of development and boom, these cities are starting to decline and industrial transformation is urgently needed. This paper focuses on evaluating the transformation capability of resource-based cities building an evaluation model. Using Text Mining and the Document Explorer technique as a way of extracting text features, the 200 most frequently used words are derived from 100 publications related to steel- and other resource-based cities. The Expert Evaluation Method (EEM) and Analytic Hierarchy Process (AHP) techniques are then applied to select 53 indicators, determine their weights and establish an index system for evaluating the transformation capability of the pillar industry of China’s steel-based cities. Using real data and expert reviews, the improved Fuzzy Relation Matrix (FRM) method is applied to two case studies in China, namely Panzhihua and Daye, and the evaluation model is developed using Fuzzy Comprehensive Evaluation (FCE). The cities’ abilities to carry out industrial transformation are evaluated with concerns expressed for the case of Daye. The findings have policy implications for the potential and required industrial transformation in the two selected cities and other resource-based towns. PMID:26422266

  12. A contribution to the structural and kinetic study of the slow transformation of an iron or uranium alpha crystal

    International Nuclear Information System (INIS)

    Donze, G.

    1958-12-01

    1- During the course of the work reported, we observed and studied a curious phenomenon of regeneration of an iron or uranium α crystal in the double transformation of iron or uranium: α → γ → α and α → β → α respectively. We have demonstrated that this phenomenon does not occur with very pure metals, but only in the case of metals containing impurities, and more particularly, containing carbon. The monocrystal is not regenerated unless care is taken not to exceed final transformation temperatures by more than a few degrees. The same phenomenon is encountered in polycrystalline compounds: the orientation of the crystals is maintained, though the respective grain positions ('joints') are considerably displaced. 2- Kinetic study of the transformation at cooling, on the one hand, and the analysis of the texture at the γ phase (iron) on the other, show that regeneration results from the conservation of the phase α germs at the high temperature phase. They appear to be relatively stable because they had retained their properties at the end of 24 hours at the experiment temperature. 3- Study of the twin crystals of γ iron engendered by the transformation α → γ demonstrated that there is no orientation relationship in the transformation: α → γ of pure iron. 4- Thanks to the production of an epitaxic oxide film on the surface of γ iron, we were able to evidence a new type of iron transformation twinned crystal which grows in one direction (110) and is in contact also at 110. Formed of very thin lamina, these crystals are very instable and become penetrant, each element - much larger - consisting of the increased thickness of a certain number of lamina. (author) [fr

  13. Hydrological simulation of flood transformations in the upper Danube River: Case study of large flood events

    Directory of Open Access Journals (Sweden)

    Mitková Veronika Bačová

    2016-12-01

    Full Text Available The problem of understand natural processes as factors that restrict, limit or even jeopardize the interests of human society is currently of great concern. The natural transformation of flood waves is increasingly affected and disturbed by artificial interventions in river basins. The Danube River basin is an area of high economic and water management importance. Channel training can result in changes in the transformation of flood waves and different hydrographic shapes of flood waves compared with the past. The estimation and evolution of the transformation of historical flood waves under recent river conditions is only possible by model simulations. For this purpose a nonlinear reservoir cascade model was constructed. The NLN-Danube nonlinear reservoir river model was used to simulate the transformation of flood waves in four sections of the Danube River from Kienstock (Austria to Štúrovo (Slovakia under relatively recent river reach conditions. The model was individually calibrated for two extreme events in August 2002 and June 2013. Some floods that occurred on the Danube during the period of 1991–2002 were used for the validation of the model. The model was used to identify changes in the transformational properties of the Danube channel in the selected river reach for some historical summer floods (1899, 1954 1965 and 1975. Finally, a simulation of flood wave propagation of the most destructive Danube flood of the last millennium (August 1501 is discussed.

  14. A complex guided spectral transform Lanczos method for studying quantum resonance states

    International Nuclear Information System (INIS)

    Yu, Hua-Gen

    2014-01-01

    A complex guided spectral transform Lanczos (cGSTL) algorithm is proposed to compute both bound and resonance states including energies, widths and wavefunctions. The algorithm comprises of two layers of complex-symmetric Lanczos iterations. A short inner layer iteration produces a set of complex formally orthogonal Lanczos (cFOL) polynomials. They are used to span the guided spectral transform function determined by a retarded Green operator. An outer layer iteration is then carried out with the transform function to compute the eigen-pairs of the system. The guided spectral transform function is designed to have the same wavefunctions as the eigenstates of the original Hamiltonian in the spectral range of interest. Therefore the energies and/or widths of bound or resonance states can be easily computed with their wavefunctions or by using a root-searching method from the guided spectral transform surface. The new cGSTL algorithm is applied to bound and resonance states of HO, and compared to previous calculations

  15. Moessbauer spectroscopy study on the hydrothermal transformation α-FeOOH → α-Fe2O3

    International Nuclear Information System (INIS)

    Barb, D.; Diamandescu, L.; Mihaila-Tarabsanu, D.; Rusi, A.; Moraria, M.

    1990-01-01

    The reaction kinetics of the hydrothermal transformation α-FeOOH→α-Fe 2 O 3 was studied by means of Moessbauer spectroscopy. From the reaction isotherms, a monomolecular, first order reaction was found to characterise the hydrothermal transformation of alpha oxihydroxide to the alpha iron oxide. The rate constant as well as the activation energy of this process were determined. No intermediate phases were identified in the hydrothermal samples. The thermodynamic properties of the hydrothermal system α-FeOOH→α-Fe 2 O 3 in correlation with Moessbauer spectroscopy data are discussed. (orig.)

  16. The tetragonal-monoclinic transformations of zirconia studied by small angle neutron scattering and differential thermal analysis

    International Nuclear Information System (INIS)

    Li, Z.; Epperson, J.E.; Fang, Y.; Chan, S.K.

    1992-08-01

    The tetragonal-monoclinic transformations of zirconia have been studied on pristine single crystals and on their cycled crystallites. Two complementary techniques have been used. Small angle neutron scattering experiments were carried out to monitor the degree of completion of a transformation under equilibrium conditions for collections of 20--30 large crystals using the total internal and external surface area as an indicator. Differential thermal analysis experiments were carried out on smaller single-domain crystals of different sizes individually during heating and cooling to measure the rates of latent heat absorption and emission. The investigation establishes the upper limit of stability of the monoclinic phase, the lower limit of stability of the tetragonal phase, and the coexistence temperature between the two phases. The characteristics of the transformations are also inferred from these experiments

  17. Study of dilution of Spin-On Glass by Fourier transform infrared spectroscopy

    International Nuclear Information System (INIS)

    Dominguez, Miguel; Rosales, Pedro; Torres, Alfonso; Moreno, Mario; Orduña, Abdu

    2012-01-01

    In this work, we study the dilution of Spin-On Glass (SOG) in order to obtain high quality SiO 2 films at 200 °C, with optical and electrical characteristics similar to those of the thermally grown SiO 2 . For the production of SiO 2 films we used 2-propanol and deionized water (DI) as diluents for the SOG and we compared the electrical and optical film properties with those of the films obtained from undiluted SOG. From Fourier transform infrared spectroscopy we observed a considerable reduction of Si-OH (920 cm −1 ), O-H (3490 cm −1 ) and C-H, C-O bonds (1139 cm −1 ) in the films produced from SOG diluted with DI. Besides the above, the insulator breakdown field was approximately 21 MV/cm, the refractive index and the dielectric constant were close to those of the thermally grown SiO 2 . Our results suggest that the film produced from SOG diluted with DI and cured at 200 °C is an excellent candidate to be used as insulator on flexible and large-area electronics. - Highlights: ► Preparation of high quality silicon oxide (SiO 2 ) films at 200 °C. ► Dilution of Spin-On Glass (SOG) solution was studied. ► Dilution of SOG is necessary to obtain high quality films annealed at 200 °C. ► n and k are close to those of the thermally grown SiO 2 .

  18. Study of dilution of Spin-On Glass by Fourier transform infrared spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Dominguez, Miguel, E-mail: mdominguez@inaoep.mx [National Institute for Astrophysics, Optics and Electronics (INAOE), Electronics Department, Luis Enrique Erro No. 1, Puebla 72840 (Mexico); Rosales, Pedro; Torres, Alfonso; Moreno, Mario [National Institute for Astrophysics, Optics and Electronics (INAOE), Electronics Department, Luis Enrique Erro No. 1, Puebla 72840 (Mexico); Orduna, Abdu [CIBA-Tlaxcala, Instituto Politecnico Nacional, Tepetitla, Tlax. 90700 (Mexico)

    2012-05-31

    In this work, we study the dilution of Spin-On Glass (SOG) in order to obtain high quality SiO{sub 2} films at 200 Degree-Sign C, with optical and electrical characteristics similar to those of the thermally grown SiO{sub 2}. For the production of SiO{sub 2} films we used 2-propanol and deionized water (DI) as diluents for the SOG and we compared the electrical and optical film properties with those of the films obtained from undiluted SOG. From Fourier transform infrared spectroscopy we observed a considerable reduction of Si-OH (920 cm{sup -1}), O-H (3490 cm{sup -1}) and C-H, C-O bonds (1139 cm{sup -1}) in the films produced from SOG diluted with DI. Besides the above, the insulator breakdown field was approximately 21 MV/cm, the refractive index and the dielectric constant were close to those of the thermally grown SiO{sub 2}. Our results suggest that the film produced from SOG diluted with DI and cured at 200 Degree-Sign C is an excellent candidate to be used as insulator on flexible and large-area electronics. - Highlights: Black-Right-Pointing-Pointer Preparation of high quality silicon oxide (SiO{sub 2}) films at 200 Degree-Sign C. Black-Right-Pointing-Pointer Dilution of Spin-On Glass (SOG) solution was studied. Black-Right-Pointing-Pointer Dilution of SOG is necessary to obtain high quality films annealed at 200 Degree-Sign C. Black-Right-Pointing-Pointer n and k are close to those of the thermally grown SiO{sub 2}.

  19. MR image features predicting hemorrhagic transformation in acute cerebral infarction: a multimodal study

    International Nuclear Information System (INIS)

    Liu, Chunming; Xu, Liang; Dong, Longchun; Liu, Zhenxing; Yang, Jun; Liu, Jun; Dong, Zhengchao; Khursheed, Aiman

    2015-01-01

    The aims of this study were to observe magnetic resonance imaging (MRI) features and the frequency of hemorrhagic transformation (HT) in patients with acute cerebral infarction and to identify the risk factors of HT. We first performed multimodal MRI (anatomical, diffusion weighted, and susceptibility weighted) scans on 87 patients with acute cerebral infarction within 24 hours after symptom onset and documented the image findings. We then performed follow-up examinations 3 days to 2 weeks after the onset or whenever the conditions of the patients worsened within 3 days. We utilized univariate statistics to identify the correlations between HT and image features and used multivariate logistical regression to correct for confounding factors to determine relevant independent image features of HT. HT was observed in 17 out of total 87 patients (19.5 %). The infarct size (p = 0.021), cerebral microbleeds (CMBs) (p = 0.004), relative apparent diffusion (rADC) (p = 0.023), and venous anomalies (p = 0.000) were significantly related with HT in the univariate statistics. Multivariate analysis demonstrated that CMBs (odd ratio (OR) = 0.082; 95 % confidence interval (CI) = 0.011-0.597; p = 0.014), rADC (OR = 0.000; 95 % CI = 0.000-0.692; p = 0.041), and venous anomalies (OR = 0.066; 95 % CI = 0.011-0.403; p = 0.003) were independent risk factors for HT. The frequency of HT is 19.5 % in this study. CMBs, rADC, and venous anomalies are independent risk factors for HT of acute cerebral infarction. (orig.)

  20. MR image features predicting hemorrhagic transformation in acute cerebral infarction: a multimodal study

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Chunming; Xu, Liang; Dong, Longchun; Liu, Zhenxing; Yang, Jun; Liu, Jun [Tianjin Union Medicine Centre, Department of Radiology, Tianjin (China); Dong, Zhengchao [Columbia University, Translational Imaging and MRI Unit, Department of Psychiatry, New York, NY (United States); New York State Psychiatric Institute, New York, NY (United States); Khursheed, Aiman [Tianjin Medical University, International Medical School, Tianjin (China)

    2015-11-15

    The aims of this study were to observe magnetic resonance imaging (MRI) features and the frequency of hemorrhagic transformation (HT) in patients with acute cerebral infarction and to identify the risk factors of HT. We first performed multimodal MRI (anatomical, diffusion weighted, and susceptibility weighted) scans on 87 patients with acute cerebral infarction within 24 hours after symptom onset and documented the image findings. We then performed follow-up examinations 3 days to 2 weeks after the onset or whenever the conditions of the patients worsened within 3 days. We utilized univariate statistics to identify the correlations between HT and image features and used multivariate logistical regression to correct for confounding factors to determine relevant independent image features of HT. HT was observed in 17 out of total 87 patients (19.5 %). The infarct size (p = 0.021), cerebral microbleeds (CMBs) (p = 0.004), relative apparent diffusion (rADC) (p = 0.023), and venous anomalies (p = 0.000) were significantly related with HT in the univariate statistics. Multivariate analysis demonstrated that CMBs (odd ratio (OR) = 0.082; 95 % confidence interval (CI) = 0.011-0.597; p = 0.014), rADC (OR = 0.000; 95 % CI = 0.000-0.692; p = 0.041), and venous anomalies (OR = 0.066; 95 % CI = 0.011-0.403; p = 0.003) were independent risk factors for HT. The frequency of HT is 19.5 % in this study. CMBs, rADC, and venous anomalies are independent risk factors for HT of acute cerebral infarction. (orig.)

  1. Study on rice transformation mediated by low energy ion beam implantation

    International Nuclear Information System (INIS)

    Li Hong; Wu Lifang; Yu Zengliang

    2001-01-01

    Delivery of foreign DNA into rice via ion beam was first reported in 1994. In recent years we have aimed to set up efficient transformation system mediated by low energy ion beam. The factors that influence the transformation including type of ion, parameters of ion energy, dose and dose rate, plant genotype, composition of media, concentration of hormones and antibiotics were carefully investigated. Treated with 25ke V Ar + , the transformation efficiencies of the mature embryos of rice variety 02428, Hua pei94-jian-09 and Minghui63 reached 11%, 11.4% and 7.1% measured by produced antibiotic resistant callus and l.52%, 1.87% and l.13% measured by regenerated plants respectively. PCR detection and Southern blot analysis showed that GUS report gene had inserted in rice genome. Low energy ion beam mediated gene transfer will be extended to other cereal recalcitrant to Agrobacterium tumefaciens as soon as methodological parameters were optimized. (authors)

  2. Raman studies of pressure and temperature induced phase transformations in calcite

    International Nuclear Information System (INIS)

    Exarhos, G.J.; Hess, N.J.

    1992-01-01

    This patent describes phase stability in the calcium carbonate system investigated as a simultaneous function of pressure and temperature up to 40 kbar and several hundred degrees Kelvin. Micro-Raman techniques were used to interrogate samples constrained within a resistively heated diamond anvil cell. Measured spectra allow unequivocal identification of crystalline phases and are used to refine the P,T phase diagram. Calcium carbonate was found to exhibit both reversible and irreversible transformation phenomena among the four known phases which exist under these conditions. Time-dependent Raman intensity variations as the material is perturbed from its equilibrium state allow real-time kinetics measurements to be performed. Evidence suggests that the order of certain observed transformations may be pressure dependent. The utility of Raman spectroscopy to follow transformation phenomena and to estimate fundamental thermophysical properties from the stress dependence of vibrational mode frequencies is demonstrated

  3. Moessbauer study of the magnetic phase transformations in SnMn3N

    International Nuclear Information System (INIS)

    Nagy, D.L.; Zimmer, G.J.; Lohner, T.; Senateur, J.P.

    1975-01-01

    Moessbauer measurements were performed on SnMn 3 N with the aim of verifying the magnetic phase transformations at 175 and 230 K and the Neel transition at 475 K as well as of seeking an explanation for the anomalous peak in magnetic susceptibility about 380 K. Moessbauer spectra were taken at several temperatures between 83 and 475 K and evaluated by a least square fitting program. Abrupt changes in the hyperfine field were found at 175, 230 and 350 K indicating first-order magnetic phase transformations at these temperatures; the 350 K transformation is certainly related to the anomaly in susceptibility. About 475 only a smooth change in the hyperfine field was found suggesting the Neel transition to be of the second order. An attempt is made to explain the relatively high hyperfine field in the cubic antiferromagnetic phase. (A.K.)

  4. Returnees, Student-Migrants and Second Chance Learners: Case Studies of Positional and Transformative Outcomes of Australian International Education

    Science.gov (United States)

    Robertson, Shanthi; Hoare, Lynnel; Harwood, Aramiha

    2011-01-01

    There is a clear need for new research into the work and life outcomes for graduates of Australian international education. Drawing upon divergent post-study transitions, this article aims to present a multi-faceted, qualitative foundation for the consideration of both positional and transformative impacts of international education on graduates'…

  5. A Phenomenological Study Investigating Transformative Learning Strategies Implemented by 10 Title I Elementary Principals That Influence Novice Teacher Retention

    Science.gov (United States)

    Fountain, Tara

    2014-01-01

    The purpose of this qualitative phenomenological study was to investigate transformative learning strategies implemented by 10 Title I elementary principals that influence novice teacher retention. Data were gathered by individual interviews. Data were analyzed using Creswell's (2013) description of qualitative research as a collection of data…

  6. Heat stability of proteins in desiccation tolerant cattail pollen (Typha latifolia): A Fourier transform infrared spectroscopic study.

    NARCIS (Netherlands)

    Wolkers, W.F.; Hoekstra, F.A.

    1997-01-01

    Secondary structure and aggregation behavior of proteins, as determined in situ in Typha latifolia pollen, were studied by means of Fourier transform infrared microspectroscopy. The amide-I band, arising from the peptide backbone, was recorded over a temperature range from -50 to 120°C at different

  7. Phase I study of transforming growth factor-beta 3 mouthwashes for prevention of chemotherapy-induced mucositis

    NARCIS (Netherlands)

    Wymenga, ANM; van der Graaf, WTA; Hofstra, LS; Spijkervet, FKL; Timens, W; Timmer-Bosscha, H; Sluiter, WJ; van Buuren, AHJAW; Mulder, NH; de Vries, EGE

    The purpose of this study was to establish the safety and tolerability of recombinant transforming growth factor-beta 3 (TGF-beta 3; CGP 46614) mouthwashes intended for prevention of chemotherapy-induced mucositis. Local effects were especially analyzed by objective and subjective measurements of

  8. Nonlinear operators and nonlinear transformations studied via the differential form of the completeness relation in quantum mechanics

    International Nuclear Information System (INIS)

    Fan Hongyi; Yu Shenxi

    1994-01-01

    We show that the differential form of the fundamental completeness relation in quantum mechanics and the technique of differentiation within an ordered product (DWOP) of operators provide a new approach for calculating normal product expansions of some nonlinear operators and study some nonlinear transformations. Their usefulness in perturbative calculations is pointed out. (orig.)

  9. A study on thermal characteristics analysis model of high frequency switching transformer

    Science.gov (United States)

    Yoo, Jin-Hyung; Jung, Tae-Uk

    2015-05-01

    Recently, interest has been shown in research on the module-integrated converter (MIC) in small-scale photovoltaic (PV) generation. In an MIC, the voltage boosting high frequency transformer should be designed to be compact in size and have high efficiency. In response to the need to satisfy these requirements, this paper presents a coupled electromagnetic analysis model of a transformer connected with a high frequency switching DC-DC converter circuit while considering thermal characteristics due to the copper and core losses. A design optimization procedure for high efficiency is also presented using this design analysis method, and it is verified by the experimental result.

  10. Metallographic Study of the Isothermal Transformation of Beta Phase in Zircaloy-2

    Energy Technology Data Exchange (ETDEWEB)

    Oestberg, G

    1960-06-15

    Observations of the structure of commercial zircaloy-2 have been made in the microscope showing that the high temperature beta phase is transformed isothermally at lower temperatures into alpha plus secondary precipitate. The alpha occurs mainly as Widmanstaetten plates developed by a shear mechanism. The secondary precipitate is formed from the beta - alpha structure at the phase boundary between these phases. This precipitation of particles of secondary phase occurs on account of a eutectoid reaction, alpha also being formed. A time-temperature transformation diagram has been constructed from the observations.

  11. Data in support of metabolic reprogramming in transformed mouse cortical astrocytes: A proteomic study

    Directory of Open Access Journals (Sweden)

    Azeddine Bentaib

    2015-03-01

    Full Text Available 2D-DIGE analysis coupled with mass spectrometry is a global, without a priori, comparative proteomic approach particularly suited to identify and quantify enzymes isoforms and structural proteins, thus making it an efficient tool for the characterization of the changes in cell phenotypes that occur in physiological and pathological conditions. In this data article in support of the research article entitled “Metabolic reprogramming in transformed mouse cortical astrocytes: a proteomic study” [1] we illustrate the changes in protein profile that occur during the metabolic reprogramming undergone by cultured mouse astrocytes in a model of in-vitro cancerous transformation [2].

  12. Transformative Learning

    Science.gov (United States)

    Wang, Victor C. X.; Cranton, Patricia

    2011-01-01

    The theory of transformative learning has been explored by different theorists and scholars. However, few scholars have made an attempt to make a comparison between transformative learning and Confucianism or between transformative learning and andragogy. The authors of this article address these comparisons to develop new and different insights…

  13. Study of planar defects associated to martensite transformation in copper alloys by transmission electron microscopy

    International Nuclear Information System (INIS)

    Condo, A.M.

    1997-01-01

    In this work the planar faults in non-compact planes (non-basal faults) in the 2H and 18R martensitic phases in Cu-Zn-Al alloys are analyzed. The study was carried out using transmission electron microscopy (TEM) combining the two-beam condition technique, high resolution transmission electron microscopy (HRTEM) and computer simulated images. The displacement vectors of the faults were determined. It was found that these vectors were different from those of the basal faults, even though the faults are connected. One single class of non-basal faults, named F 1 , was observed in the 2H phase, whereas two different classes were found in the 18R phase, named F o and F x . In the latter phase non-basal faults made up of different segments of F o and F x faults were observed (composed faults). The Burgers vectors of the partial dislocations at the edges of the non-basal faults were determined in both phases. Additionally, the Burgers vectors of the intermediate dislocations found between the different segments of the composed faults in the 18R phase were determined. It was verified that there exist two types of dislocations with Burgers vectors that differ in approximately 1/3 [100]. It was found that the presence of a particular dislocation type depends on the arrangement between the non-basal fault and the basal fault that originates the dislocation. The internal structure of the non-basal faults in the 18R phase was studied with HRTEM. It was observed that the shift of the crystal planes due to the presence of the faults occurs in a region of a finite extension of about 1.5 nm. It was also observed that in this region the crystal planes appear rotated and lose the characteristic corrugation they have in the 18R structure. As a consequence of this, new translation vectors appear in the defect; this fact could be reflected in new plastic deformation systems. The rotation of the crystal planes in the non-basal faulted area of the 18R phase was compared with the rotation

  14. A study on ranking the effects of transformational leadership style on organizational agility and mediating role of organizational creativity

    Directory of Open Access Journals (Sweden)

    Seidmehdi Veiseh

    2014-09-01

    Full Text Available The purpose of this study was to investigate the effects of the components of transformational leadership style on organizational agility and mediating role of organizational creativity in Ilam Gas Refinery located in province of Ilam, Iran. The method of the present study was descriptive and correlational-structural equation modeling. The population of this research included all 400 workers of Ilam gas refinery and the study chose a sample of196 employees. The questionnaire was standardized using Cronbach's alpha; the obtained reliability was 0.90, which indicated the reliability of the questionnaire. At the end, the data was analyzed by LISREL software and structural equation modeling analysis was conducted. The findings showed that transformational leadership style had an effect on organizational agility. In addition, organizational creativity maintained a mediator role on influencing the transformational leadership on organizational agility. The four dimensions of transformational leadership, hopeful influence, inspirational motivation, intellectual encouragement as well as personal considerations also influenced on the agility of organizations.

  15. Transformation of acesulfame in chlorination: Kinetics study, identification of byproducts, and toxicity assessment.

    Science.gov (United States)

    Li, Adela Jing; Wu, Pengran; Law, Japhet Cheuk-Fung; Chow, Chi-Hang; Postigo, Cristina; Guo, Ying; Leung, Kelvin Sze-Yin

    2017-06-15

    Acesulfame (ACE) is one of the most commonly used artificial sweeteners. Because it is not metabolized in the human gut, it reaches the aquatic environment unchanged. In the present study, the reactivity of ACE in free chlorine-containing water was investigated for the first time. The degradation of ACE was found to follow pseudo-first-order kinetics. The first-order rate increased with decreasing pH from 9.4 to 4.8 with estimated half-lives from 693 min to 2 min. Structural elucidation of the detected transformation products (TPs) was performed by ultra-high performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry. Integration of MS/MS fragments, isotopic pattern and exact mass allowed the characterization of up to 5 different TPs in the ultrapure water extracts analyzed, including two proposed new chlorinated compounds reported for the first time. Unexpectedly, several known and regulated disinfection by-products (DBPs) were present in the ACE chlorinated solution. In addition, two of the six DBPs are proposed as N-DBPs. Time-course profiles of ACE and the identified by-products in tap water and wastewater samples were followed in order to simulate the actual disinfection process. Tap water did not significantly affect degradation, but wastewater did; it reacted with the ACE to produce several brominated-DBPs. A preliminary assessment of chlorinated mixtures by luminescence inhibition of Vibrio fischeri showed that these by-products were up to 1.8-fold more toxic than the parent compound. The generation of these DBPs, both regulated and not, representing enhanced toxicity, make chlorine disinfection a controversial treatment for ACE. Further efforts are urgently needed to both assess the consequences of current water treatment processes on ACE and to develop new processes that will safely treat ACE. Human health and the health of our aquatic ecosystems are at stake. Copyright © 2017 Elsevier Ltd. All rights reserved.

  16. Pilot study of a training program to enhance transformational leadership in Spinal Cord Injury Peer Mentors.

    Science.gov (United States)

    Martin Ginis, Kathleen A; Shaw, Robert B; Stork, Matthew J; Battalova, Alfiya; McBride, Christopher B

    2018-01-01

    Experimental, pragmatic design. (1) To determine the effects of a transformational leadership (TFL) training program on spinal cord injury (SCI) peer mentors and their mentees; (2) To document characteristics of mentorship within a community-based SCI peer mentor program. In total 23 SCI peer mentors (70% male; M age = 47.4 ± 12.1) were randomly allocated to an Experimental or Control condition. Experimental condition mentors received a half-day TFL workshop and bi-weekly emailed information on using TFL in SCI peer mentorship. Sixteen SCI mentees (50% male; M age = 49.1 ± 12.9) enrolled in the study and 9 completed measures of self-efficacy and their mentors' use of TFL and supportiveness at 3 and 6-months. Mentors completed monthly reports of mentorship activities. Community-based peer mentorship program in British Columbia, Canada. There were no between-groups differences in mentee self-efficacy, mentor use of TFL or mentor supportiveness. In the Experimental condition only, total mentorship time and sessions were positively correlated with mentors' use of TFL and supportiveness. Mentorship occurred in-person, by phone, text, and email and mentors discussed an average of 11 topics. The intervention did not increase SCI peer mentors' use of TFL relative to a Control condition. Nevertheless, there may be merit in coaching SCI peer mentors to use TFL given the positive correlations between mentorship time and sessions, TFL use, and perceived supportiveness of the mentor. Although inherently challenging, research involving community-based SCI peer mentorship programs provides opportunities for scientists and community organizations to extend knowledge of peer mentorship beyond the context of hospital-based programs. Research supported by a SSHRC Partnership Development Grant.

  17. A study on ranking the effects of transformational leadership style on organizational agility and mediating role of organizational creativity

    OpenAIRE

    Seidmehdi Veiseh; Ardshir shiri; Neeman Eghbali

    2014-01-01

    The purpose of this study was to investigate the effects of the components of transformational leadership style on organizational agility and mediating role of organizational creativity in Ilam Gas Refinery located in province of Ilam, Iran. The method of the present study was descriptive and correlational-structural equation modeling. The population of this research included all 400 workers of Ilam gas refinery and the study chose a sample of196 employees. The questionnaire was standardized ...

  18. Transformation of 3-chloroallyl alcohol in water-saturated subsoil studied with a column method

    NARCIS (Netherlands)

    Beltman, W.H.J.; Leistra, M.; Matser, A.M.

    1996-01-01

    The performance of a newly developed column method for pesticide transformation rate measurements in the subsoil was tested using (Z)- and (E)-3-chloroallyl alcohol as model compounds. The subsoil columns were filled in situ. In the column experiment the half-life ranged from 0.5-5.2 d for

  19. A Study of Self-Perceived Transformational Leadership Behaviors of Special Education Directors

    Science.gov (United States)

    Williams, Kristen E.

    2014-01-01

    The special education director is responsible for a myriad of responsibilities related to the education of students with disabilities. Little is known about the leadership behaviors associated with this position. Considerable research has been done to document the many benefits of transformational leadership behaviors on organizational climate and…

  20. Using ERP systems to transform business processes : A case study at a precession engineering company

    NARCIS (Netherlands)

    Lee, C.K.M.; Zhang, L.; Lee, P.X.; Au, K.O.

    2009-01-01

    Enterprises nowadays strive to keep transforming their business processes in accordance with the fast-changing customer demands so as to survive the intense global competition. In an attempt to provide practitioners with an insight into ERP implementation and the resulting business performances,

  1. Comparative study of radiation, chemical, and aging effects on viral transformation. Annual progress report, 1975

    International Nuclear Information System (INIS)

    Coggin, J.H. Jr.

    1976-01-01

    Progress is reported on the following research projects: evaluation of isotopic antiglobulin test (IAT) to detect tumor associated antigens using antisera induced by x-irradiated tumor cells; development of cytotoxic antibody for embryonic antigens (EA); acrylamide gel cell culture assay for transformation; and evaluation of 3-MCA induced sarcomas for TSTA and cross-reacting antigens

  2. On the oxidation mechanism of microcrystalline silicon thin films studied by Fourier transform infrared spectroscopy

    NARCIS (Netherlands)

    Bronneberg, A. C.; Smets, A. H. M.; Creatore, M.; M. C. M. van de Sanden,

    2011-01-01

    Insight into the oxidation mechanism of microcrystalline silicon thin films has been obtained by means of Fourier transform infrared spectroscopy. The films were deposited by using the expanding thermal plasma and their oxidation upon air exposure was followed in time. Transmission spectra were

  3. Comparative study of radiation, chemical, and aging effects on viral transformation. Annual progress report, 1975

    Energy Technology Data Exchange (ETDEWEB)

    Coggin, J.H. Jr.

    1976-03-31

    Progress is reported on the following research projects: evaluation of isotopic antiglobulin test (IAT) to detect tumor associated antigens using antisera induced by x-irradiated tumor cells; development of cytotoxic antibody for embryonic antigens (EA); acrylamide gel cell culture assay for transformation; and evaluation of 3-MCA induced sarcomas for TSTA and cross-reacting antigens. (HLW)

  4. The Transformative Power of Travel? Four Social Studies Teachers Reflect on Their International Professional Development

    Science.gov (United States)

    Patterson, Timothy

    2015-01-01

    Common sense thinking on international professional development suggests that the rewards for teachers are automatic. One of the most frequently advertised gains teachers are expected to see from participation includes the likelihood that they will have a transformative experience, whereby aspects of their personal or professional attributes are…

  5. A Transformational Approach to VHDL and CDFG Based High-Level Synthesis: a Case Study

    NARCIS (Netherlands)

    Middelhoek, Peter F.A.; Middelhoek, P.F.A.; Mekenkamp, G.E.; Molenkamp, Egbert; Krol, Th.

    1995-01-01

    In this paper, a novel multi-target design methodology based on the concepts of transformational design, and its application to the interlaced-to-progressive scan conversion (IPSC) problem, are discussed. Starting from a single high-level behavioral specification in VHDL a direction detector used in

  6. Ab initio study of pressure stabilized NiTi allotropes: Pressure-induced transformations

    Czech Academy of Sciences Publication Activity Database

    Holec, D.; Friák, M.; Dlouhý, Antonín; Neugebauer, J.

    2011-01-01

    Roč. 84, č. 22 (2011), 224119/1-224119/8 ISSN 1098-0121 Institutional research plan: CEZ:AV0Z20410507 Keywords : shape - memory alloys * martensitic transformations * local stability Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.691, year: 2011

  7. Reforming a University during Political Transformation: A Case Study of Yangon University in Myanmar

    Science.gov (United States)

    Esson, James; Wang, Kevin

    2018-01-01

    Since 2010, Myanmar has been transitioning from an authoritarian military regime towards a parliamentary democracy. Several education policies have been launched as part of this political transformation process, including the reform of Myanmar's flagship higher education institution, Yangon University. This article investigates the reform of…

  8. Surface Immobilization of Engineered Nanomaterials for in Situ Study of their Environmental Transformations and Fate

    Science.gov (United States)

    The transformation and environmental fate of engineered nanomaterials (ENMs) is the focus of intense research due to concerns about their potential impacts in the environment as a result of their uniquely engineered properties. Many approaches are being applied to investigate th...

  9. Transformational Leadership and Organizational Commitment: A Study of UNC System Business School Department Chairs

    Science.gov (United States)

    Luton, Bill

    2010-01-01

    Ample evidence is available citing a positive relationship between transformational leadership and organizational commitment (Boerner et al., 2007; Bono & Judge, 2003; Bycio, Hackett, & Allen, 1995; Chen, 2004; Emery & Barker, 2007; Walumbwa, Orwa, Wang, & Lawler, 2005). The majority of research on leadership in higher education,…

  10. A study of transformation water - soluble forms of hevy metals at waste incenerator for detoxicationof ash.

    Directory of Open Access Journals (Sweden)

    Bilets'ka V. А.

    2011-11-01

    Full Text Available The complex research processes of transformation of soluble forms of heavy metals in sediment interaction with ash. Proved that the adsorption processes of immobilization lead to a significant decrease of soluble forms of heavy metals in the waste.

  11. Transformational Leadership and Innovation: A Comparison Study between Iraq's Public and Private Higher Education

    Science.gov (United States)

    Al-Husseini, Sawasn; Elbeltagi, Ibrahim

    2016-01-01

    With globalisation and a rapidly changing environment, the higher education sector in developing countries is facing challenges that require extraordinary leaders. Innovation is important for organisations, particularly in learning environments. Transformational leadership (TL) has been found to have an important influence on innovation, leading…

  12. Studies of Phase Transformation in Molecular Crystals Using the Positron Annihilation Technique

    DEFF Research Database (Denmark)

    Eldrup, Morten Mostgaard; Lightbody, David; Sherwood, John N.

    1980-01-01

    An examination has been made of the brittle/plastic phase transformation in the molecular crystals cyclohexane, DL-camphene and succinonitrile using the positron annihilation technique. In each material, the transition is characterized by a distinct increase in ortho-positronium lifetime. The inf...

  13. Ab initio study of the bcc-hcp transformation in iron

    Czech Academy of Sciences Publication Activity Database

    Friák, Martin; Šob, Mojmír

    2008-01-01

    Roč. 77, č. 17 (2008), 174117/1-174117/7 ISSN 1098-0121 R&D Projects: GA MŠk OC 147; GA AV ČR IAA1041302 Institutional research plan: CEZ:AV0Z20410507 Keywords : ab initio calculations * phase transformations * iron Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.322, year: 2008

  14. Pilot study of extremely low frequency magnetic fields emitted by transformers in dwellings. Social aspects.

    Science.gov (United States)

    Zaryabova, Victoria; Shalamanova, Tsvetelina; Israel, Michel

    2013-06-01

    in the International study TRANSEXPO. The pilot work has been completed in five countries (Finland, Hungary, Israel, Switzerland and Bulgaria). In 2008, Bulgaria through the National Centre of Public Health Protection joined with pilot study in TRANSEXPO Project. At this first stage of the project our investigation was directed to performing measurements in dwellings with built-in transformer stations, collecting data of population and cancer registry and choosing the epidemiology design feasible for continuing the project. Taking into account the available sources of information in Bulgaria (different registers of the population) needed for epidemiological approach, it was found that the most appropriate epidemiology design would be the nested case-control study. Control group could be collected in accordance with the international requirements for such epidemiological studies. This approach could be modified in the course of the further study in order to ensure achievement of the purposes of the main international requirements of the study.

  15. Contribution towards the study of {beta}{yields}{alpha} transformation in uranium and its alloys (1962); Contribution a l'etude de la transformation {beta}{yields}{alpha} dans l'uranium et ses alliages (1962)

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, H. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1962-05-15

    The kinetics of the transformation of uranium alloys containing 0.5 - 0.75 - 1.0 - 1.5 and 3 atoms per cent have been studied. The influence of heat treatment before decomposition has been discussed. The study of the transformation characteristics such as kinetics, residual phases, phenomena connected with the coherence between phases, reversibility below the equilibrium temperature, shows the following mechanisms exhibited during the decomposition of the {beta} phase on lowering the temperature: 1 ) eutectoid, 2) bainitic, 3) martensitic. The study of the TTT diagrams of alloys containing decreasing percentages of chromium indicates that the unalloyed uranium transforms without maintaining the coherence above 600 deg. C, where as at lower temperatures the transformation is mainly martensitic. The various alloying elements can be characterised by their influence on the three TTT curves corresponding to the three possible transformation mechanisms. The ability of the uranium alloys to alpha grain refining during isothermal decomposition or ambient temperature quenching is directly connected with the characteristics of the TTT diagrams and especially to the mode of bainitic transformation. (author) [French] II a ete etudie la cinetique de transformation des alliages uranium-chrome de teneur 0,5 - 0,75 - 1 - 1,5 - et 3 atomes pour cent. L'influence des traitements thermiques precedant la decomposition a ete discutee. L'etude des caracteristiques de la transformation: cinetique, phases residuelles, phenomenes lies a la coherence entre phases, reversibilite au-dessous de la temperature d'equilibre, permet de conclure que la decomposition met en jeu successivement les trois mecanismes eutectoide, bainitique et martensitique quand la temperature baisse. L'etude de l'evolution des diagrammes TTT quand la teneur en Cr decroit indique que dans l'uranium non allie la transformation se fait sans maintien de la coherence au-dessus de 600 deg. C; a

  16. Contribution towards the study of {beta}{yields}{alpha} transformation in uranium and its alloys (1962); Contribution a l'etude de la transformation {beta}{yields}{alpha} dans l'uranium et ses alliages (1962)

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, H [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1962-05-15

    The kinetics of the transformation of uranium alloys containing 0.5 - 0.75 - 1.0 - 1.5 and 3 atoms per cent have been studied. The influence of heat treatment before decomposition has been discussed. The study of the transformation characteristics such as kinetics, residual phases, phenomena connected with the coherence between phases, reversibility below the equilibrium temperature, shows the following mechanisms exhibited during the decomposition of the {beta} phase on lowering the temperature: 1 ) eutectoid, 2) bainitic, 3) martensitic. The study of the TTT diagrams of alloys containing decreasing percentages of chromium indicates that the unalloyed uranium transforms without maintaining the coherence above 600 deg. C, where as at lower temperatures the transformation is mainly martensitic. The various alloying elements can be characterised by their influence on the three TTT curves corresponding to the three possible transformation mechanisms. The ability of the uranium alloys to alpha grain refining during isothermal decomposition or ambient temperature quenching is directly connected with the characteristics of the TTT diagrams and especially to the mode of bainitic transformation. (author) [French] II a ete etudie la cinetique de transformation des alliages uranium-chrome de teneur 0,5 - 0,75 - 1 - 1,5 - et 3 atomes pour cent. L'influence des traitements thermiques precedant la decomposition a ete discutee. L'etude des caracteristiques de la transformation: cinetique, phases residuelles, phenomenes lies a la coherence entre phases, reversibilite au-dessous de la temperature d'equilibre, permet de conclure que la decomposition met en jeu successivement les trois mecanismes eutectoide, bainitique et martensitique quand la temperature baisse. L'etude de l'evolution des diagrammes TTT quand la teneur en Cr decroit indique que dans l'uranium non allie la transformation se fait sans maintien de la coherence au-dessus de 600 deg. C; a plus basse temperature la

  17. Backlund transformations as canonical transformations

    International Nuclear Information System (INIS)

    Villani, A.; Zimerman, A.H.

    1977-01-01

    Toda and Wadati as well as Kodama and Wadati have shown that the Backlund transformations, for the exponential lattice equation, sine-Gordon equation, K-dV (Korteweg de Vries) equation and modifies K-dV equation, are canonical transformation. It is shown that the Backlund transformation for the Boussinesq equation, for a generalized K-dV equation, for a model equation for shallow water waves and for the nonlinear Schroedinger equation are also canonical transformations [pt

  18. Digital Transformation and Disruption of the Health Care Sector: Internet-Based Observational Study.

    Science.gov (United States)

    Herrmann, Maximilian; Boehme, Philip; Mondritzki, Thomas; Ehlers, Jan P; Kavadias, Stylianos; Truebel, Hubert

    2018-03-27

    Digital innovation, introduced across many industries, is a strong force of transformation. Some industries have seen faster transformation, whereas the health care sector only recently came into focus. A context where digital corporations move into health care, payers strive to keep rising costs at bay, and longer-living patients desire continuously improved quality of care points to a digital and value-based transformation with drastic implications for the health care sector. We tried to operationalize the discussion within the health care sector around digital and disruptive innovation to identify what type of technological enablers, business models, and value networks seem to be emerging from different groups of innovators with respect to their digital transformational efforts. From the Forbes 2000 and CBinsights databases, we identified 100 leading technology, life science, and start-up companies active in the health care sector. Further analysis identified projects from these companies within a digital context that were subsequently evaluated using the following criteria: delivery of patient value, presence of a comprehensive and distinctive underlying business model, solutions provided, and customer needs addressed. Our methodological approach recorded more than 400 projects and collaborations. We identified patterns that show established corporations rely more on incremental innovation that supports their current business models, while start-ups engage their flexibility to explore new market segments with notable transformations of established business models. Thereby, start-ups offer higher promises of disruptive innovation. Additionally, start-ups offer more diversified value propositions addressing broader areas of the health care sector. Digital transformation is an opportunity to accelerate health care performance by lowering cost and improving quality of care. At an economic scale, business models can be strengthened and disruptive innovation models

  19. Study on critical heat flux based on wavelet transform in rectangular narrow channels

    International Nuclear Information System (INIS)

    Zhou Tao; Ju Zhongyun; Zhang Lei; Li Jingjing; Sheng Cheng; Xiao Zejun

    2014-01-01

    Critical heat flux is very important for the safety of nuclear reactor, and observing temperature rise rate is a feasible method. The wavelet transform is used to analyze the CHF temperature rise curves in rectangular narrow channels, which can remove relative weaker interference and effectively judge CHF. Rectangular narrow channel can strengthen heat transfer and reduce CHF, whose characteristics are proved by temperature rise curves analyzed by wavelet transform. Respectively applying Daubechies function and Haar function is to guarantee the accuracy of the wavelet analysis, and Daubechies function is more accurate than Haar function in the detail signal processing from results. While the wavelet analysis and experimental results are compared and found in good agreement with the experimental results. (authors)

  20. Study on critical heat flux based on wavelet transform in rectangular narrow channels

    International Nuclear Information System (INIS)

    Zhou Tao; Ju Zhongyun; Zhang Lei; Li Jingjing; Sheng Cheng; Xiao Zejun

    2014-01-01

    Critical heat flux is very important for nuclear reactor safety, and observing temperature rise rate is a feasible method. Through using the wavelet transform to analyze the CHF temperature rise curves in rectangular narrow channels, it can remove relative weaker interference and effectively judge CHF. Rectangular narrow channel can strengthen heat transfer and reduce CHF, whose characteristics are proved by, temperature rise curves analyzed by wavelet transform. Respectively applying Daubechies function and Haar function is for guarantee the accuracy of the wavelet analysis, and Daubechies function is more accurate than Haar function in the detail signal processing from results. While the wavelet analysis and experimental results are compared and found in good agreement with the experimental results. (authors)

  1. Nanocrystalline material in toroidal cores for current transformer: analytical study and computational simulations

    Directory of Open Access Journals (Sweden)

    Benedito Antonio Luciano

    2005-12-01

    Full Text Available Based on electrical and magnetic properties, such as saturation magnetization, initial permeability, and coercivity, in this work are presented some considerations about the possibilities of applications of nanocrystalline alloys in toroidal cores for current transformers. It is discussed how the magnetic characteristics of the core material affect the performance of the current transformer. From the magnetic characterization and the computational simulations, using the finite element method (FEM, it has been verified that, at the typical CT operation value of flux density, the nanocrystalline alloys properties reinforce the hypothesis that the use of these materials in measurement CT cores can reduce the ratio and phase errors and can also improve its accuracy class.

  2. The Study of Phase Transformations of AlSi9Cu3 Alloy by DSC Method

    Directory of Open Access Journals (Sweden)

    Piątkowski J.

    2016-12-01

    Full Text Available With the use of differential scanning calorimetry (DSC, the characteristic temperatures and enthalpy of phase transformations were defined for commercial AlSi9Cu3 cast alloy (EN AC-46000 that is being used for example for pressurized castings for automotive industry. During the heating with the speed of 10°C·min−1 two endothermic effects has been observed. The first appears at the temperature between 495 °C and 534 °C, and the other between 555 °C and 631 °C. With these reactions the phase transformation enthalpy comes up as +6 J g−1 and +327 J g−1. During the cooling with the same speed, three endothermic reactions were observed at the temperatures between 584 °C and 471 °C. The total enthalpy of the transitions is – 348 J g−1.

  3. Preliminary study of a phase transformation in insulin crystals using synchrotron-radiation Laue diffraction

    Energy Technology Data Exchange (ETDEWEB)

    Reynolds, C D; Stowell, B; Joshi, K K; Harding, M M; Maginn, S J; Dodson, G G

    1988-10-01

    Synchrotron-radiation Laue diffraction photographs have been recorded showing the transformation of single 4Zn insulin crystals (a=80.7 (1), c=37.6 (1) A, space group R3) to 2Zn insulin (a=82.5 (1), c=34.0 (1) A, space group R3). The transformation was brought about by changing the mother liquor in the capillary in which the crystal was mounted. Photographs were taken at 10 min intervals (exposure time 3 s) from 0.5 h after mounting. They showed initially a well ordered 4Zn insulin crystal (d/sub min/ ca 2.3 A), then a poorly ordered, sometimes multiple, crystal, and finally a 2Zn insulin crystal, about as well ordered as the initial crystal.

  4. Transforming vulnerability.

    Science.gov (United States)

    Jones, Patricia S; Zhang, Xinwei Esther; Meleis, Afaf I

    2003-11-01

    Asian American immigrant women engaged in filial caregiving are at special risk for health problems due to complex contextual factors related to immigration, cultural traditions, and role transition. This study examines the experience of two groups of immigrant Asian American women who are caring for older parents. A total of 41 women (22 Chinese American and 19 Filipino American) were interviewed in a study based on Strauss and Corbin's grounded theory methodology. The women were determined to be loyal to their traditional culture, which included strong filial values, while adapting to a new culture. Through the struggle of meeting role expectations and coping with paradox, the women mobilized personal and family resources to transform vulnerability into strength and well-being.

  5. A study of renal blood flow regulation using the discrete wavelet transform

    Science.gov (United States)

    Pavlov, Alexey N.; Pavlova, Olga N.; Mosekilde, Erik; Sosnovtseva, Olga V.

    2010-02-01

    In this paper we provide a way to distinguish features of renal blood flow autoregulation mechanisms in normotensive and hypertensive rats based on the discrete wavelet transform. Using the variability of the wavelet coefficients we show distinctions that occur between the normal and pathological states. A reduction of this variability in hypertension is observed on the microscopic level of the blood flow in efferent arteriole of single nephrons. This reduction is probably associated with higher flexibility of healthy cardiovascular system.

  6. Moessbauer study of the transformations occurring in egyptian alluvial and calcareous clays during firing

    International Nuclear Information System (INIS)

    Sallam, H.A.; Gomma, N.S.; El Meligy, W.M.; Eissa, N.A.

    1994-01-01

    Egyptian alluvial and calcareous clay samples, which are used in pottery production, were heated at different temperatures in air up to 1100 degree C. The physicochemical transformations were followed up and could be separated in two main stages; i) the dehydroxilation, of the clay mineral, stage for firing up to 700 degree C, ii) the second stage for firing at 900 degree C and higher. In the later stage the effect of calcium content was very pronounced. 2 figs

  7. Defense Science Board 2005 Summer Study on Transformation: A Progress Assessment. Volume 2. Supporting Reports

    Science.gov (United States)

    2006-04-01

    Banking Mr. Robert Luby, IBM Dr. Robert Lucky, Telcordia Technologies Mr. William Lynn, Raytheon Mr. Dave Oliver, EADS North America GOVERNMENT...MAY 2005 Central Command (CENTCOM) COL Peter Zielinski CENTCOM Office of Force Transformation (OFT) Review of COCOM Experimentation COL Richard...for Defense Analyses Mr. Patrick McCarthy, U.S. Joint Forces Command Mr. Stephen Moore, U.S. Joint Forces Command MAY 10, 2005 COL Peter Zielinski

  8. A Study of Transformational Leadership and Managerial Competencies in the Flower Agricultural Sector of Colombia

    OpenAIRE

    Iliana Páez; Andrés Rincón; Margarita Astudillo; Stella Bohórquez

    2014-01-01

    Rev.esc.adm.neg A good leadership is essential for the successful development of organizations and their staff members. Transformational leadership is a contemporary focus which highlights the moral bases of leadership and which has been valued in different cultures, being associated with its efectiviness and workers´ outcomes such as satisfaction and performance. This leadership is manifested through four basic performance dimensions (idealized influence, inspiring motivation, intellectu...

  9. Experimental studies of influence of different electrodes on bridging in contaminated transformer oil

    OpenAIRE

    Mahmud, S.; Chen, G.; Golosnoy, I.O.; Wilson, G.; Jarman, P.

    2015-01-01

    Contaminated transformer oil has been tested under non uniform electric fields and the effect of different electrode systems presented in this paper. Three different electric fields were examined i.e. DC, AC and DC biased AC. These experiments revealed that with all the different electrodes arrangements, contaminated particles always formed bridges between electrodes under DC electric field. The bridges were thicker and more particles were attracted with more uniform electric field (spherical...

  10. Structural transformation of compressed solid Ar: An x-ray diffraction study to 114 GPa

    International Nuclear Information System (INIS)

    Errandonea, D.; Boehler, R.; Japel, S.; Mezouar, M.; Benedetti, L. R.

    2006-01-01

    Room temperature angle-dispersive x-ray diffraction measurements on solid Ar up to 114 GPa reveal evidence of a structural phase transformation after stress relaxation by laser heating. Beyond 49.6 GPa, Ar exhibits the coexistence of fcc and hcp phases with an increasing hcp/fcc ratio, similar to the observation made recently on krypton and xenon. From the present results, we estimate the fcc-to-hcp transition to be completed at 300 GPa

  11. Fourier transform infrared spectroscopic study of intact cells of the nitrogen-fixing bacterium Azospirillum brasilense

    Science.gov (United States)

    Kamnev, A. A.; Ristić, M.; Antonyuk, L. P.; Chernyshev, A. V.; Ignatov, V. V.

    1997-06-01

    The data of Fourier transform infrared (FTIR) spectroscopic measurements performed on intact cells of the soil nitrogen-fixing bacterium Azospirillum brasilense grown in a standard medium and under the conditions of an increased metal uptake are compared and discussed. The structural FTIR information obtained is considered together with atomic absorption spectrometry (AAS) data on the content of metal cations in the bacterial cells. Some methodological aspects concerning preparation of bacterial cell samples for FTIR measurements are also discussed.

  12. Agrobacterium rhizogenes-mediated transformation of Arachis hypogaea: an efficient tool for functional study of genes

    Directory of Open Access Journals (Sweden)

    Shuai Liu

    2016-09-01

    Full Text Available We have developed a technique for efficient transformation of hairy roots of Arachis hypogaea L. using Agrobacterium rhizogenes K599, and have validated this approach for the investigation of gene function. As a model transgene, AhAREB1, a drought-resistance gene from peanut, was fused to green fluorescent protein, and four parameters that might influence the transformation efficiency were tested. The optimal procedure involved the use of petioles with four expanded leaves as explants, infection by K599 at optical density (OD600 of 0.6 for 15 min and co-cultivation for 2 d, giving transformation efficiencies of up to 91%. Hairy roots from transgenic peanut plants overexpressing AhAREB1 were unaffected by treatment with polyethylene glycol (PEG, demonstrating increased drought tolerance, whereas control roots showed clear signs of plasmolysis. Transgenic roots accumulated less superoxide anion (O2− than control roots under drought conditions. Additionally, transgenic roots displayed upregulation of four stress-response genes encoding WRKY transcription factor (WRKY33, MYB transcription factor (MYB92, abscisic acid receptor (PYL5 and dehydrin 2 (DHN2.

  13. Transitions to Sustainable Development. New Directions in the Study of Long Term Transformative Change

    International Nuclear Information System (INIS)

    Grin, J.; Rotmans, J.; Schot, J.; Geels, F.; Loorbach, D.

    2010-01-01

    Over the past few decades, there has been a growing concern about the social and environmental risks which have come along with the progress achieved through a variety of mutually intertwined modernization processes. In recent years these concerns are transformed into a widely-shared sense of urgency, partly due to events such as the various pandemics threatening livestock, and increasing awareness of the risks and realities of climate change, and the energy and food crises. This sense of urgency includes an awareness that our entire social system is in need of fundamental transformation. But like the earlier transition between the 1750s and 1890s from a pre-modern to a modern industrial society, this second transition is also a contested one. Sustainable development is only one of many options. This book addresses the issue on how to understand the dynamics and governance of the second transition dynamics in order to ensure sustainable development. It will be necessary reading for students and scholars with an interest in sustainable development and long-term transformative change.

  14. Martensitic transformation in Eurofer-97 and ODS-Eurofer steels: A comparative study

    International Nuclear Information System (INIS)

    Zilnyk, K.D.; Oliveira, V.B.; Sandim, H.R.Z.; Möslang, A.; Raabe, D.

    2015-01-01

    Highlights: • Martensitic transformation of RAFM steels promotes significant grain fragmentation. • Austenite grain growth occurs in Eurofer-97 steel but not in ODS-Eurofer steel. • Boundary misorientation distribution of the as-quenched steels show two maxima peaks. • The amount of retained austenite varies from one steel to another. - Abstract: Reduced-activation ferritic–martensitic Eurofer-97 and ODS-Eurofer steels are potential candidates for structural applications in advanced nuclear reactors. Samples of both steel grades in the as-tempered condition were austenitized in vacuum for 1 h from 900 °C to 1300 °C followed by air cooling to room temperature. The microstructure was characterized by dilatometry, electron backscatter diffraction (EBSD), and X-ray diffraction (XRD). Thermodynamic calculations provided by Thermo-Calc software were used to determine their transformation temperatures. Even having similar chemical composition, important changes were observed after martensitic transformation in these steels. Significant austenitic grain growth was observed in Eurofer-97 steel leading to the development of coarser martensitic packets. Contrastingly, austenitic grain growth was prevented in ODS-Eurofer steel due to fine and stable dispersion of Y-based particles

  15. Transitions to Sustainable Development. New Directions in the Study of Long Term Transformative Change

    Energy Technology Data Exchange (ETDEWEB)

    Grin, J. [Department of Political Science, University of Amsterdam, Amsterdam (Netherlands); Rotmans, J. [Sustainability Transitions and Transition Management, Erasmus University Rotterdam, Rotterdam (Netherlands); Schot, J. [Eindhoven University of Technology, Eindhoven (Netherlands); Geels, F. [Science Policy Research Unit SPRU, University of Sussex, Brighton (United Kingdom); Loorbach, D. [Dutch Research Institute for Transitions Drift, Erasmus University Rotterdam, Rotterdam (Netherlands)

    2010-07-01

    Over the past few decades, there has been a growing concern about the social and environmental risks which have come along with the progress achieved through a variety of mutually intertwined modernization processes. In recent years these concerns are transformed into a widely-shared sense of urgency, partly due to events such as the various pandemics threatening livestock, and increasing awareness of the risks and realities of climate change, and the energy and food crises. This sense of urgency includes an awareness that our entire social system is in need of fundamental transformation. But like the earlier transition between the 1750s and 1890s from a pre-modern to a modern industrial society, this second transition is also a contested one. Sustainable development is only one of many options. This book addresses the issue on how to understand the dynamics and governance of the second transition dynamics in order to ensure sustainable development. It will be necessary reading for students and scholars with an interest in sustainable development and long-term transformative change.

  16. Experimental studies on particle emissions from cruising ship, their characteristic properties, transformation and atmospheric lifetime in the marine boundary layer

    Science.gov (United States)

    Petzold, A.; Hasselbach, J.; Lauer, P.; Baumann, R.; Franke, K.; Gurk, C.; Schlager, H.; Weingartner, E.

    2008-05-01

    Particle emissions from ship engines and their atmospheric transformation in the marine boundary layer (MBL) were investigated in engine test bed studies and in airborne measurements of expanding ship plumes. During the test rig studies, detailed aerosol microphysical and chemical properties were measured in the exhaust gas of a serial MAN B&W seven-cylinder four-stroke marine diesel engine under various load conditions. The emission studies were complemented by airborne aerosol transformation studies in the plume of a large container ship in the English Channel using the DLR aircraft Falcon 20 E-5. Observations from emission studies and plume studies combined with a Gaussian plume dispersion model yield a consistent picture of particle transformation processes from emission to atmospheric processing during plume expansion. Particulate matter emission indices obtained from plume measurements are 8.8±1.0×1015(kg fuel)-1 by number for non-volatile particles and 174±43 mg (kg fuel)-1 by mass for Black Carbon (BC). Values determined for test rig conditions between 85 and 110% engine load are of similar magnitude. For the total particle number including volatile compounds no emission index can be derived since the volatile aerosol fraction is subject to rapid transformation processes in the plume. Ship exhaust particles occur in the size range Dp<0.3 μm, showing a bi-modal structure. The combustion particle mode is centred at modal diameters of 0.05 μm for raw emissions to 0.10 μm at a plume age of 1 h. The smaller-sized volatile particle mode is centred at Dp≤0.02 μm. From the decay of ship exhaust particle number concentrations in an expanding plume, a maximum plume life time of approx. 24 h is estimated for a well-mixed marine boundary layer.

  17. Anatase-rutile phase transformation of titanium dioxide bulk material: a DFT + U approach

    International Nuclear Information System (INIS)

    Vu, Nam H; Le, Hieu V; Cao, Thi M; Pham, Viet V; Le, Hung M; Nguyen-Manh, Duc

    2012-01-01

    The anatase-rutile phase transformation of TiO 2 bulk material is investigated using a density functional theory (DFT) approach in this study. According to the calculations employing the Perdew-Burke-Ernzerhof (PBE) exchange-correlation functional with the Vanderbilt ultrasoft pseudopotential, it is suggested that the anatase phase is more energetically stable than rutile, which is in variance with the experimental observations. Consequently, the DFT + U method is employed in order to predict the correct structural stability in titania from electronic-structure-based total energy calculations. The Hubbard U term is determined by examining the band structure of rutile with various values of U from 3 to 10 eV. At U = 5 eV, a theoretical bandgap for rutile is obtained as 3.12 eV, which is in very good agreement with the reported experimental bandgap. Hence, we choose the DFT + U method (with U = 5 eV) to investigate the transformation pathway using the newly-developed solid-state nudged elastic band (ss-NEB) method, and consequently obtain an intermediate transition structure that is 9.794 eV per four-TiO 2 above the anatase phase. When the Ti-O bonds in the transition state are examined using charge density analysis, seven Ti-O bonds (out of 24 bonds in the anatase unit cell) are broken, and this result is in excellent agreement with a previous experimental study (Penn and Banfield 1999 Am. Miner. 84 871-6).

  18. The contribution of skin blood flow in warming the skin after the application of local heat; the duality of the Pennes heat equation.

    Science.gov (United States)

    Petrofsky, Jerrold; Paluso, Dominic; Anderson, Devyn; Swan, Kristin; Yim, Jong Eun; Murugesan, Vengatesh; Chindam, Tirupathi; Goraksh, Neha; Alshammari, Faris; Lee, Haneul; Trivedi, Moxi; Hudlikar, Akshay N; Katrak, Vahishta

    2011-04-01

    As predicted by the Pennes equation, skin blood flow is a major contributor to the removal of heat from an external heat source. This protects the skin from erythema and burns. But, for a person in a thermally neutral room, the skin is normally much cooler than arterial blood. Therefore, if skin blood flow (BF) increases, it should initially warm the skin paradoxically. To examine this phenomenon, 10 young male and female subjects participated in a series of experiments to examine the contribution of skin blood flow in the initial warming the skin after the application of local heat. Heat flow was measured by the use of a thermode above the brachioradialis muscle. The thermode was warmed by constant temperature water at 44°C entering the thermode at a water flow rate of 100 cm(3)/min. Skin temperature was measured by a thermistor and blood flow in the underlying skin was measured by a laser Doppler imager in single point mode. The results of the experiments showed that, when skin temperature is cool (31-32°C), the number of calories being transferred to the skin from the thermode cannot account for the rise in skin temperature alone. A significant portion of the rise in skin temperature is due to the warm arterialized blood traversing the skin from the core areas of the body. However, as skin temperature approaches central core temperature, it becomes less of a heat source and more of a heat sync such that when skin temperature is at or above core temperature, the blood flow to the skin, as predicted by Pennes, becomes a heat sync pulling heat from the thermode. Copyright © 2010 IPEM. Published by Elsevier Ltd. All rights reserved.

  19. The Guatemala-Penn Partners: An Innovative Inter-Institutional Model for Scientific Capacity-Building, Healthcare Education, and Public Health

    Science.gov (United States)

    Paniagua-Avila, Maria Alejandra; Messenger, Elizabeth; Nelson, Caroline A.; Calgua, Erwin; Barg, Frances K.; Bream, Kent W.; Compher, Charlene; Dean, Anthony J.; Martinez-Siekavizza, Sergio; Puac-Polanco, Victor; Richmond, Therese S.; Roth, Rudolf R.; Branas, Charles C.

    2017-01-01

    Population health outcomes are directly related to robust public health programs, access to basic health services, and a well-trained health-care workforce. Effective health services need to systematically identify solutions, scientifically test these solutions, and share generated knowledge. The World Health Organization (WHO)’s Global Healthcare Workforce Alliance states that the capacity to perform research is an essential factor for well-functioning public health systems. Low- and middle-income countries have greater health-care worker shortages and lower research capacity than higher-income countries. International global health partnerships between higher-income countries and low-middle-income countries aim to directly address such inequalities through capacity building, a process by which human and institutional resources are strengthened and developed, allowing them to perform high-level functions, solve complex problems, and achieve important objectives. The Guatemala–Penn Partners (GPP) is a collaboration among academic centers in Guatemala and the University of Pennsylvania (Penn), in Philadelphia, Pennsylvania that echoes the vision of the WHO’s Global Healthcare Workforce Alliance. This article describes the historical development and present organization of the GPP according to its three guiding principles: university-to-university connections, dual autonomies with locally led capacity building, and mutually beneficial exchanges. It describes the GPP activities within the domains of science, health-care education, and public health, emphasizing implementation factors, such as sustainability and scalability, in relation to the guiding principles. Successes and limitations of this innovative model are also analyzed in the hope that the lessons learned may be applied to similar partnerships across the globe. PMID:28443274

  20. Contaminated site investigation using nuclear technique: a case study of temporary transformer storage sites in Ghana

    International Nuclear Information System (INIS)

    Sanu, J. K.

    2013-07-01

    Recent introduction of man-made toxic chemicals, and the massive relocation of natural materials to different environmental compartment like soil, ground water and atmosphere, has resulted in severe pressure on the self- cleansing capacity of recipient ecosystems. Various accomulated pollutants and contaminants such as polychlorinated biphenyls (PCBs) are of much concern relative to both human and ecosystemm exposure and potential health impact. PCBs which are resistant to degradation and bioremediation accumulated in different niches of the biosphere. This significantly affects the ecological balances and cause adverse health effect on both human and the environment. Temporal transformer storage sites at four locations in Ghana (Tema, Temale, Bolgatanga and Wa) were investigated for PCB contamination using nuclear techniques. Analysis of soil samples from four temporal transformer storage sites revealed that the soil samples from Tema, Tamale, Bolgatanga and Wa were generally sandy with pH and EC ranging between 6.24 - 7.29 and 44.60 - 188.30 respectively. The PCB levels detected in the soil samples from the various locations varied considerably with mean ranging between 7.69 and 51.92 mg/kg. The highest mean PCB level was recorded at the Tema temporal transformer storage site (51.92 mg/kg), whilst the least mean level of 7.69 mg/kg was recorded at Wa storage site. At Tamale the individual levels range between 3.57 mg/kg and 38.70 mg/kg while at Bolgatanga it was 6.85 - 16.30 mg/kg and Wa, 6.08 - 14.70mg/kg. About 9% of soil samples from temporal transformer storage sites analysed had total PCBs concentrations above the 25mg/kg and 33 mg/kg level recommended by the Canadian Council of Ministers of environment (CCME) and EPA Ghana respectively for the protection of environment and human health. Generally, the Levels of PCBs in soil samples were found to decrease with increasing depth at all the temporal transformer storage sites. Results obtained using the EPA's L

  1. Aging study on carboxymethyl cellulose-coated zero-valent iron nanoparticles in water: Chemical transformation and structural evolution

    International Nuclear Information System (INIS)

    Dong, Haoran; Zhao, Feng; Zeng, Guangming; Tang, Lin; Fan, Changzheng; Zhang, Lihua; Zeng, Yalan; He, Qi; Xie, Yankai; Wu, Yanan

    2016-01-01

    Highlights: • The chemical transformation and structural evolution of CMC-nZVI were investigated. • CMC could slow down the aging rate of nZVI and alter the species transformation. • Fe_3O_4 and/or γ-Fe_2O_3 are the dominant corrosion products of bare nZVI after aging. • γ-FeOOH is the primary corrosion product of CMC-nZVI after aging. - Abstract: To assess the long-term fate and the associated risks of nanoscale zero-valent iron (nZVI) used in the water remediation, it is essential to understand the chemical transformations during aging of nZVI in water. This study investigated the compositional and structural evolution of bare nZVI and carboxymethyl cellulose (CMC) coated nZVI in static water over a period of 90 days. Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy were used to characterize the corrosion products of nZVI and CMC-nZVI. Results show that both the structures and the compositions of the corrosion products change with the process of aging, but the coating of CMC could slow down the aging rate of nZVI (as indicated by the slower drop in Fe"0 intensity in XRD pattern). For the bare nZVI, magnetite (Fe_3O_4) and/or maghemite (γ-Fe_2O_3) are the dominant corrosion products after 90 days of aging. However, for the CMC-nZVI, the core-shell spheres collapses to acicular-shaped structures after aging with crystalline lepidocrocite (γ-FeOOH) as the primary end product. Moreover, more lepidocrocite present in the corrosion products of CMC-nZVI with higher loading of CMC, which reveals that the CMC coating could influence the transformation of iron oxides.

  2. Hadamard Transforms

    CERN Document Server

    Agaian, Sos; Egiazarian, Karen; Astola, Jaakko

    2011-01-01

    The Hadamard matrix and Hadamard transform are fundamental problem-solving tools in a wide spectrum of scientific disciplines and technologies, such as communication systems, signal and image processing (signal representation, coding, filtering, recognition, and watermarking), digital logic (Boolean function analysis and synthesis), and fault-tolerant system design. Hadamard Transforms intends to bring together different topics concerning current developments in Hadamard matrices, transforms, and their applications. Each chapter begins with the basics of the theory, progresses to more advanced

  3. X-ray diffraction study of low-temperature phase transformations in nickel-titanium orthodontic wires.

    Science.gov (United States)

    Iijima, M; Brantley, W A; Guo, W H; Clark, W A T; Yuasa, T; Mizoguchi, I

    2008-11-01

    Employ conventional X-ray diffraction (XRD) to analyze three clinically important nickel-titanium orthodontic wire alloys over a range of temperatures between 25 and -110 degrees C, for comparison with previous results from temperature-modulated differential scanning calorimetry (TMDSC) studies. The archwires selected were 35 degrees C Copper Ni-Ti (Ormco), Neo Sentalloy (GAC International), and Nitinol SE (3M Unitek). Neo Sentalloy, which exhibits superelastic behavior, is marketed as having shape memory in the oral environment, and Nitinol SE and 35 degrees C Copper Ni-Ti also exhibit superelastic behavior. All archwires had dimensions of 0.016in.x0.022in. (0.41 mm x 0.56 mm). Straight segments cut with a water-cooled diamond saw were placed side-by-side to yield a 1 cm x 1cm test sample of each wire product for XRD analysis (Rint-Ultima(+), Rigaku) over a 2theta range from 30 degrees to 130 degrees and at successive temperatures of 25, -110, -60, -20, 0 and 25 degrees C. The phases revealed by XRD at the different analysis temperatures were in good agreement with those found in previous TMDSC studies of transformations in these alloys, in particular verifying the presence of R-phase at 25 degrees C. Precise comparisons are not possible because of the approximate nature of the transformation temperatures determined by TMDSC and the preferred crystallographic orientation present in the wires. New XRD peaks appear to result from low-temperature transformation in martensite, which a recent transmission electron microscopy (TEM) study has shown to arise from twinning. While XRD is a useful technique to study phases in nickel-titanium orthodontic wires and their transformations as a function of temperature, optimum insight is obtained when XRD analyses are combined with complementary TMDSC and TEM study of the wires.

  4. The role of higher education in transforming the quality of dementia care: dementia studies at the University of Bradford.

    Science.gov (United States)

    Downs, M; Capstick, A; Baldwin, P C; Surr, C; Bruce, E

    2009-04-01

    There is now widespread concern about the inadequate care and support provided to people with dementia from diagnosis to death. It is acknowledged that while there is a range of effective ways to care for and support people with dementia and their families from diagnosis to death, these have yet to become integral to practice. In England, for example, the National Dementia Strategy seeks to transform the quality of dementia care. One of the key components to transforming the quality of care is to ensure we have an informed and effective workforce. We argue here that in order to transform the quality of care we need to distinguish between the aims of training and education. Whilst there is a place for skills-based workplace training, Higher Education in dementia studies has a key role to play in the provision of specialist knowledge and skills in dementia care emphasizing as it does the development of critical thinking, reflection and action. In this paper we describe dementia studies at Bradford University available at both undergraduate and postgraduate levels. We outline their aims and learning outcomes, curricula, approach to teaching, learning and assessment. We describe the nature of students who study with us, noting their fit with the Higher Education Funding Council in England's agenda for widening participation in higher education. Higher Education in dementia studies has a unique role to play in equipping practitioners and professionals with the information, skills and attitudes to realize the potential for quality of life for people with dementia and their families.

  5. Study on the dynamic evaluation of the regional green low-carbon transformation in China evidence from Qingdao, Yantai and Weihai

    International Nuclear Information System (INIS)

    Wang, Chongmei

    2016-01-01

    Green low-carbon transformation is necessary to achieve sustainable development in “the eighteenth”. Based on the literature review of regional green low-carbon transformation, regional green low-carbon transformation and evaluation framework are defined as the process of building regional green low-carbon transformation. We think that the system innovation is a complex system. By establishing collaborative model of the green transformation of the system innovation, we evaluate dynamically the regional green transformation capacity with data envelopment analysis from changing and developing of the two systems. Which react the efficiency of resource allocation of two systems in-depth analysis of the interaction between the two development of the internal mechanism, and clearing the mechanism between system innovation and transformation capacity. Be corroborated in the case of the practice green transformation of the Jiaodong Peninsula (Qingdao, Yantai and Weihai), strengthening the quantitative study of the depth of the theory and practice in transition. We concluded that: the overall coordination between system innovation and green transformation in Jiaodong Peninsula is good during 2010–2013. System innovation capacity cannot be fully translated into green transformation capacity, and lag weakens the supporting role of other developments in the field innovation for the transition. The situation has become better since 2010. Finally, it focus that the value of research applications and future research direction.

  6. Using Mindfulness to Build a Transformative School Culture: A Phenomenological Study of Elementary School Principals Who Create an Atmosphere of Academic Rigor and Teacher Effectiveness

    Science.gov (United States)

    FitzGerald, Susan

    2012-01-01

    This study focused on the motivations and discernment leading to the transformational leadership approach and showed there is continuing momentum in the area towards mindful engagement to build trust in a school culture. The purpose of the study was to investigate how transformational leaders build a culture through trust and commitment within a…

  7. Study on the algorithm of computational ghost imaging based on discrete fourier transform measurement matrix

    Science.gov (United States)

    Zhang, Leihong; Liang, Dong; Li, Bei; Kang, Yi; Pan, Zilan; Zhang, Dawei; Gao, Xiumin; Ma, Xiuhua

    2016-07-01

    On the basis of analyzing the cosine light field with determined analytic expression and the pseudo-inverse method, the object is illuminated by a presetting light field with a determined discrete Fourier transform measurement matrix, and the object image is reconstructed by the pseudo-inverse method. The analytic expression of the algorithm of computational ghost imaging based on discrete Fourier transform measurement matrix is deduced theoretically, and compared with the algorithm of compressive computational ghost imaging based on random measurement matrix. The reconstruction process and the reconstruction error are analyzed. On this basis, the simulation is done to verify the theoretical analysis. When the sampling measurement number is similar to the number of object pixel, the rank of discrete Fourier transform matrix is the same as the one of the random measurement matrix, the PSNR of the reconstruction image of FGI algorithm and PGI algorithm are similar, the reconstruction error of the traditional CGI algorithm is lower than that of reconstruction image based on FGI algorithm and PGI algorithm. As the decreasing of the number of sampling measurement, the PSNR of reconstruction image based on FGI algorithm decreases slowly, and the PSNR of reconstruction image based on PGI algorithm and CGI algorithm decreases sharply. The reconstruction time of FGI algorithm is lower than that of other algorithms and is not affected by the number of sampling measurement. The FGI algorithm can effectively filter out the random white noise through a low-pass filter and realize the reconstruction denoising which has a higher denoising capability than that of the CGI algorithm. The FGI algorithm can improve the reconstruction accuracy and the reconstruction speed of computational ghost imaging.

  8. DEMOCRACY AND AUTONOMY TRANSFORMATION IN THE GOVERNANCE OF MENGWI VILLAGE IN THE TRANSITION ERA: A CULTURAL STUDIES PERSPECTIVE

    Directory of Open Access Journals (Sweden)

    I Wayan Gede Suacana

    2012-11-01

    Full Text Available This study discusses “Democra cy and Autonomy Transformation in theGovernance of Mengwi Village in the Transition Era: A Cultural StudiesPerspective”. The problem investigated was the shift in the nation’s approach to thepolicy of villages after the reign of New Order. In this era, the policy ofdemocratization and decentralization appeared till the village level. However, thepolicy was not totally implemented in the villages. The aims of this study are: todescribe democracy transformation in the village governance in the transition era, toclarify autonomy transformation in the village governance in the transition era, and toanalyze the implication and the sense of democracy and autonomy transfor mation tothe development of village governance.This study was conducted employing qualitative method. Various forms ofdemocracy and autonomy transformation in the village governance took place duringthe transition era. In the first stage, the primary and secondary data were collected. Inthe second stage, the theory applied for examining the data was chosen, and in thethird stage, the collected and classified data were analyzed and interpreted. In thefourth stage the results of the study were reported and constructed. The theoriesapplied in this study include; democracy, political democracy, substantial democracy,decentrali zation and political culture. The approaches applied were Tranpolitic andpost-structuralism.The results of the study showed that; first, the village democracy in the firsttransition era (1998-1999 was mostly still uniform, and there were not many choicesin the implementation of the village democracy. The village autonomy was stillblocked in centralistic pattern, homogeneous with hierarchical structure. Second, inthe second transition era (2000-2004 the role of the village representatives became sodemocratic accompanied by the extended village autonomy. Third, in the thirdtransition era (2005-2008 democracy became retransformed to

  9. Collaborative Proposal: Transforming How Climate System Models are Used: A Global, Multi-Resolution Approach

    Energy Technology Data Exchange (ETDEWEB)

    Estep, Donald

    2013-04-15

    Despite the great interest in regional modeling for both weather and climate applications, regional modeling is not yet at the stage that it can be used routinely and effectively for climate modeling of the ocean. The overarching goal of this project is to transform how climate models are used by developing and implementing a robust, efficient, and accurate global approach to regional ocean modeling. To achieve this goal, we will use theoretical and computational means to resolve several basic modeling and algorithmic issues. The first task is to develop techniques for transitioning between parameterized and high-fidelity regional ocean models as the discretization grid transitions from coarse to fine regions. The second task is to develop estimates for the error in scientifically relevant quantities of interest that provide a systematic way to automatically determine where refinement is needed in order to obtain accurate simulations of dynamic and tracer transport in regional ocean models. The third task is to develop efficient, accurate, and robust time-stepping schemes for variable spatial resolution discretizations used in regional ocean models of dynamics and tracer transport. The fourth task is to develop frequency-dependent eddy viscosity finite element and discontinuous Galerkin methods and study their performance and effectiveness for simulation of dynamics and tracer transport in regional ocean models. These four projects share common difficulties and will be approach using a common computational and mathematical toolbox. This is a multidisciplinary project involving faculty and postdocs from Colorado State University, Florida State University, and Penn State University along with scientists from Los Alamos National Laboratory. The completion of the tasks listed within the discussion of the four sub-projects will go a long way towards meeting our goal of developing superior regional ocean models that will transform how climate system models are used.

  10. Study of phase transformation processes in steel after phosphor ion implantation and following thermal treatment

    International Nuclear Information System (INIS)

    Zhetbaev, A.K.; Vereshchak, N.F.; Satpaev, K.K.; Dosmagambetov, T.D.; Serikbaeva, Z.T.

    1999-01-01

    In the paper process of phase transformation after phosphor ion implantation in steel-45 and annealing in vacuum at 1000 deg C and irradiation by various doses of phosphor ions with energy 100 keV an accelerator are researched by conversion electron method. The phosphor overall solubility in iron is equal 4.53 %. Implantation dose below 6·10 17 ions/cm 2 allows increase phosphor ions content in implantation region to 35 %. Therefore, iron phosphides (Fe 3 P, Fe 2 P and Fe P) forming are possible. (author)

  11. Learning Dynamics in Transformational Change: A Study of Workforce Behavior in the Developing Economies

    Directory of Open Access Journals (Sweden)

    Abdul Majid

    2011-10-01

    Full Text Available Organizational and individual learning are two different concepts in contemporaryorganizational theory. Organizational learning is a difficult concept which needs to be furtherelucidated for organizational practitioner at actual work setting; especially in the developingcountries like Pakistan. This paper reviews the literature on organizational learning intransformational change, and the comparative learning processes in the developed anddeveloping economies. Furthermore, we are dealing here with the proposed learning cycle instrategic change process with special reference to the developing countries.Keywords: Learning cycle, Transformational change, Innovation, Learning Dynamics

  12. Visualizing Transformation

    DEFF Research Database (Denmark)

    Pedersen, Pia

    2012-01-01

    Transformation, defined as the step of extracting, arranging and simplifying data into visual form (M. Neurath, 1974), was developed in connection with ISOTYPE (International System Of TYpographic Picture Education) and might well be the most important legacy of Isotype to the field of graphic...... design. Recently transformation has attracted renewed interest because of the book The Transformer written by Robin Kinross and Marie Neurath. My on-going research project, summarized in this paper, identifies and depicts the essential principles of data visualization underlying the process...... of transformation with reference to Marie Neurath’s sketches on the Bilston Project. The material has been collected at the Otto and Marie Neurath Collection housed at the University of Reading, UK. By using data visualization as a research method to look directly into the process of transformation, the project...

  13. Application of wavelet and Fuorier transforms as powerful alternatives for derivative spectrophotometry in analysis of binary mixtures: A comparative study

    Science.gov (United States)

    Hassan, Said A.; Abdel-Gawad, Sherif A.

    2018-02-01

    Two signal processing methods, namely, Continuous Wavelet Transform (CWT) and the second was Discrete Fourier Transform (DFT) were introduced as alternatives to the classical Derivative Spectrophotometry (DS) in analysis of binary mixtures. To show the advantages of these methods, a comparative study was performed on a binary mixture of Naltrexone (NTX) and Bupropion (BUP). The methods were compared by analyzing laboratory prepared mixtures of the two drugs. By comparing performance of the three methods, it was proved that CWT and DFT methods are more efficient and advantageous in analysis of mixtures with overlapped spectra than DS. The three signal processing methods were adopted for the quantification of NTX and BUP in pure and tablet forms. The adopted methods were validated according to the ICH guideline where accuracy, precision and specificity were found to be within appropriate limits.

  14. Ash transformation and deposit build-up during biomass suspension and grate firing: Full-scale experimental studies

    DEFF Research Database (Denmark)

    Shafique Bashir, Muhammad; Jensen, Peter Arendt; Frandsen, Flemming

    2012-01-01

    An attractive option for reducing the net CO2 emissions is to substitute coal with biomass in large power plant boilers. However, the presence of chlorine (Cl) and alkali metals (K, Na) in biomassmay induce large operational problems due to ash deposit formation on the superheater tubes. The aim...... of this study was to investigate ash transformation and deposition behavior in two biomass-fired boilers, firing wheat straw and/or wood. The influence of strawfiring technology (grate and suspension) on the ash transformation, deposit formation rate and deposit characteristics has been investigated. Bulk...... elemental analysis of fly ashes revealed that fly ash from suspension firing of straw has high contents of Si, K and Ca, while fly ash from straw firing on grate was rich in the volatile elements K, Cl and S. Investigations of deposit formation ratesweremade in the superheater and convective pass regions...

  15. A study on the migration and transformation law of nitrogen in urine in municipal wastewater transportation and treatment.

    Science.gov (United States)

    Wuang, Ren; Pengkang, Jin; Chenggang, Liang; Xiaochang, Wang; Lei, Zhang

    2013-01-01

    Many studies suggest that the total nitrogen (TN) in urine is around 9,000 mg/L and about 80% of nitrogen in municipal wastewater comes from urine, because nitrogen mainly occurs in the form of urea in fresh human urine. Based on this fact, the study on the migration and transformation law of nitrogen in urine and its influencing factors was carried out. It can be seen from the experimental results that the transformation rate of urea in urine into ammonia nitrogen after standing for 20 days is only about 18.2%, but the urea in urine can be hydrolyzed into ammonia nitrogen rapidly after it is catalyzed directly with free urease or indirectly with microorganism. Adding respectively a certain amount of urease, activated sludge and septic-tank sludge to urine samples can make the maximum transformation rate achieve 85% after 1 day, 2 days and 6 days, respectively. In combination with some corresponding treatment methods, recycling of nitrogen in urine can be achieved. The results are of great significance in guiding denitrification in municipal wastewater treatment.

  16. Transformation of traditional houses in the development of sustainable rural tourism, case study of Brayut Tourism Village in Yogyakarta

    Science.gov (United States)

    Vitasurya, V. R.; Hardiman, G.; Sari, S. R.

    2018-01-01

    This paper aims to reveal local values used by Brayut villagers to maintain the existence of the traditional house as a dwelling. The transformation of traditional houses goes as time passes, influenced by internal aspects related to the needs of residents and external aspects related to the regional development by the government. Traditional Javanese house as a cultural identity of Javanese people, especially in the village, has also experienced the transformation phenomenon. Modernization affects local residents’ needs and the Government’s Development Program for tourism village influences demands of change. An unfocused transformation can lead to a total change that can eliminate the cultural identity of the rural Java community. The method used is the case study by taking three models of Javanese house in Brayut Village. Brayut Tourism Village is a cultural tourism village that relies on tradition as a tourist attraction. The existence of traditional Javanese house is an important asset for retaining its authenticity as a dwelling. Three models taken as the case studies represent the traditional Javanese house types. The result obtained is that the family bond is a major factor in preserving the traditional Javanese house in Brayut Village, Yogyakarta.

  17. Study on the Transformation and Upgrade of E-Commerce Application in Manufacturing Industry

    Directory of Open Access Journals (Sweden)

    Zhao Liang

    2017-01-01

    Full Text Available Under the Internet thinking, manufacturing management mode is changed, it is not depend on the scale, but in the user as the center, more dependent on the reaction rate of user requirements. As the big data, cloud computing, Internet of things technology such as the development of technology, manufacturing is from automatic to intelligent evolution, on the user's personalized customization is possible. Using Internet thinking positive development manufacturing enterprise electronic commerce application mode of transformation and upgrading of manufacturing industry plays an important role. Promoting the continued ascent of manufacturing industry informatization level, promote the transformation of the manufacturing production mode, provide greater profit space for the export of products. In industrial 4.0 mode, the user is the core of the enterprise, C2B model will be the mainstream of future manufacturing e-commerce application mode. This paper to present the sorted out the basic model of manufacturing enterprise electronic commerce application, point out the existing problems, and the computing technology, communication technology, the constant development of storage technology, such as background, puts forward the corresponding countermeasure, points out that the C2B model is the development direction of manufacturing enterprise electronic commerce application mode.

  18. Studying on tempering transformation and internal friction for low carbon bainitic steel

    Energy Technology Data Exchange (ETDEWEB)

    Li, Weijuan, E-mail: liweijuan826@163.com; Cai, Mingyu; Wang, Dong; Zhang, Junwei; Zhao, Shengshi; Shao, Peiying

    2017-01-02

    The changes of microstructure during the process of tempering transformation were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction and internal friction (IF) for low carbon bainite steel. The yield strength of the steel was tested after tempering transformation. The results showed that the microstructures of the experimental steel in rolled state were composed of lath bainite and granular bainite with a little Mo{sub 2}C and NbC precipitates. The lath width of bainite increased continuously with the tempering time. More cell structures with different orientations were formed in bainite laths. Furthermore, poly-gonization gradually began in some laths. The microstructure of granular bainite increased and was coarsened when it devoured the lath bainite continuously. The dislocation density of the bainitic ferrite decreased continuously as Mo{sub 2}C and NbC precipitations were further increasing. The peak value of Snoek decreased continuously in internal friction-temperature spectrum. The peak value of SKK at the surface decreased at first and then increased. The peak value of SKK at the center decreased firstly and then had little change. Besides, the yield strength of the steel increased firstly and then decreased.

  19. Study of the Transformation of the Oil of Used Soya in Fatty Acid Ethyl Ester

    Directory of Open Access Journals (Sweden)

    Anabel Sarracent-López

    2016-07-01

    Full Text Available The reuse of vegetable oils in food processing brings harmful health effects and on the other hand needs a complex treatment to discard without affecting the environment. Transformed into methyl or ethyl esters of fatty acids and glycerin by transesterification with the corresponding alcohol, can be a suitable method for treatment. It was investigated residual soybean oil from a producer of fried foods and ethanol. It is known that with this spirit the transformation process presents difficulties not listed with methanol, but at the same time does not bring the drawbacks of the latter, for toxicity and acquisition, and that since it is a derivative of the domestic sugar industry does not constitute a raw material import. We experimented with ethanol 80 %, 85 % and 90 % purity and worked 35 ºC and 50 ºC. Final yields of ethyl esters, are low compared with those obtained for similar processes with methanol, 85 % being the highest yield obtained under the conditions of the process. An assessment of costs was conducted to produce 1L of ethyl esters in the laboratory, the expenses of 0,56 pesos/L.

  20. Studying on tempering transformation and internal friction for low carbon bainitic steel

    International Nuclear Information System (INIS)

    Li, Weijuan; Cai, Mingyu; Wang, Dong; Zhang, Junwei; Zhao, Shengshi; Shao, Peiying

    2017-01-01

    The changes of microstructure during the process of tempering transformation were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction and internal friction (IF) for low carbon bainite steel. The yield strength of the steel was tested after tempering transformation. The results showed that the microstructures of the experimental steel in rolled state were composed of lath bainite and granular bainite with a little Mo 2 C and NbC precipitates. The lath width of bainite increased continuously with the tempering time. More cell structures with different orientations were formed in bainite laths. Furthermore, poly-gonization gradually began in some laths. The microstructure of granular bainite increased and was coarsened when it devoured the lath bainite continuously. The dislocation density of the bainitic ferrite decreased continuously as Mo 2 C and NbC precipitations were further increasing. The peak value of Snoek decreased continuously in internal friction-temperature spectrum. The peak value of SKK at the surface decreased at first and then increased. The peak value of SKK at the center decreased firstly and then had little change. Besides, the yield strength of the steel increased firstly and then decreased.

  1. Mechanistic studies on the transformation of ethanol into ethene over Fe-ZSM-5 zeolite.

    Science.gov (United States)

    Maihom, Thana; Khongpracha, Pipat; Sirijaraensre, Jakkapan; Limtrakul, Jumras

    2013-01-14

    Ethanol, through the utilization of bioethanol as a chemical resource, has received considerable industrial attention as it provides an alternative route to produce more valuable hydrocarbons. Using a density functional theory approach incorporating the M06-L functional, which includes dispersion interactions, a large 34T nanocluster model of Fe-ZSM-5 zeolite in which T is a Si or Al atom is employed to examine both the stepwise and concerted mechanisms of the transformation of ethanol into ethene. For the stepwise mechanism, ethanol dehydration commences from the first hydrogen abstraction of the ethanol OH group to form the ethoxide-hydroxide intermediate with a low activation energy of 17.7 kcal mol(-1). Consequently, the ethoxide-hydroxide intermediate is decomposed into ethene through hydrogen abstraction from the ethoxide methyl carbon to either the OH group of hydroxide or the oxygen of the ethoxide group with high activation energies of 64.8 and 63.5 kcal mol(-1), respectively. For the concerted mechanism, ethanol transformation into the ethene product occurs in a single step without intermediate formation, with an activation energy of 32.9 kcal mol(-1). Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  2. Limitations of Dower's inverse transform for the study of atrial loops during atrial fibrillation.

    Science.gov (United States)

    Guillem, María S; Climent, Andreu M; Bollmann, Andreas; Husser, Daniela; Millet, José; Castells, Francisco

    2009-08-01

    Spatial characteristics of atrial fibrillatory waves have been extracted by using a vectorcardiogram (VCG) during atrial fibrillation (AF). However, the VCG is usually not recorded in clinical practice and atrial loops are derived from the 12-lead electrocardiogram (ECG). We evaluated the suitability of the reconstruction of orthogonal leads from the 12-lead ECG for fibrillatory waves in AF. We used the Physikalisch-Technische Bundesanstalt diagnostic ECG database, which contains 15 simultaneously recorded signals (12-lead ECG and three Frank orthogonal leads) of 13 patients during AF. Frank leads were derived from the 12-lead ECG by using Dower's inverse transform. Derived leads were then compared to true Frank leads in terms of the relative error achieved. We calculated the orientation of AF loops of both recorded orthogonal leads and derived leads and measured the difference in estimated orientation. Also, we investigated the relationship of errors in derivation with fibrillatory wave amplitude, frequency, wave residuum, and fit to a plane of the AF loops. Errors in derivation of AF loops were 68 +/- 31% and errors in the estimation of orientation were 35.85 +/- 20.43 degrees . We did not find any correlation among these errors and amplitude, frequency, or other parameters. In conclusion, Dower's inverse transform should not be used for the derivation of orthogonal leads from the 12-lead ECG for the analysis of fibrillatory wave loops in AF. Spatial parameters obtained after this derivation may differ from those obtained from recorded orthogonal leads.

  3. Structural and metabolic studies of O-linked fucose-containing proteins of normal and virally-transformed rat fibroblasts

    International Nuclear Information System (INIS)

    Morton, P.A.

    1985-01-01

    Previous studies in this laboratory have demonstrated that cultured human and rodent cells contain a series of low molecular weight glycosylated amino acids of unusual structure, designated amino acid fucosides. The incorporation of radiolabelled-fucose into one of these components, designated FL4a (glucosylfucosylthreonine), is markedly-reduced in transformed epithelial and fibroblastic cells. The authors have examined fucose-labelled normal and virally-transformed rat fibroblast cell lines for glycoproteins which might be precursors to amino acid fucosides. Using milk alkaline/borohydride treatment (the beta-elimination reaction) to release O-linked oligosaccharides from proteins, they have isolated and partially characterized two low M/sub r/ reaction products (designated DS-ol and TS-ol) released from macromolecular cell material. The identity of one of these components (DS-ol, glucosylfucitol) suggested the existence in these cells of a direct protein precursor to FL4a. They examined fucose-labelled macromolecular cell material for proteins which release DS-ol (DS-proteins.). Using gel filtration chromatography and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) with subsequent autoradiography, they have observed DS-proteins which appear to exhibit a broad molecular weight size range, and are also present in culture medium from normal and transformed cells. The findings suggest that mammalian cells contain DS-proteins and TS-proteins with a novel carbohydrate-peptide linkage wherein L-fucose is O-linked to a polypeptide backbone. Metabolic studies were undertaken to examine both the relationship between DS-protein and FL4a and the biochemical basis for the decreased level of FL4a and the biochemical basis for the decreased level of FL4a observed in transformed cells

  4. The convolution transform

    CERN Document Server

    Hirschman, Isidore Isaac

    2005-01-01

    In studies of general operators of the same nature, general convolution transforms are immediately encountered as the objects of inversion. The relation between differential operators and integral transforms is the basic theme of this work, which is geared toward upper-level undergraduates and graduate students. It may be read easily by anyone with a working knowledge of real and complex variable theory. Topics include the finite and non-finite kernels, variation diminishing transforms, asymptotic behavior of kernels, real inversion theory, representation theory, the Weierstrass transform, and

  5. Comparative study of allotropic transformations of uranium and iron and of their structural consequences; Etude comparee des transformations allotropiques de l'uranium et du fer et de leurs consequences structurales

    Energy Technology Data Exchange (ETDEWEB)

    Lehr, P [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1957-06-15

    The {alpha} {r_reversible} {beta} phase change in pure uranium occurs, as in the case of the {alpha} {r_reversible} {gamma} transformation in pure iron, according to a nucleation and growth process. The development of the nuclei during these transformations have been studied by controlling in a furnace presenting a temperature gradient, a slow and regular movement of the interface between the two phase. In those conditions, the number of {alpha} nuclei so formed, is limited and the development of big crystals, elongated in the direction of the temperature gradient, or eventually single crystals are obtained. The crystallographic orientation of these iron or uranium crystals, and their degree of perfection have been analysed. The dilatometric behaviour of the uranium single crystals were studied on a fraction of their crystallographic orientation. The expansion coefficients along the three principal axes of the orthorhombic {alpha} cell were measured. By passing through the {alpha} {r_reversible} {beta} or {beta} {r_reversible} {gamma} transformation points of uranium, it is possible to suppress all prior textures presented by the metal. Especially, water-quenching of uranium from the {beta} phase, gives a grain sufficiently small in size and without preferential orientation, so that a statistic compensation of the expansion anisotropy of each grain can be obtained. The stresses, created by fast cooling in the transformation range, produce a recrystallization of the metal during further annealing in the {alpha} phase. The volume change, which accompanies the {alpha} {r_reversible} {beta} transformation in uranium, and the {alpha} {r_reversible} {gamma} transformation in iron, creates, during the formation of the new phase nuclei and their subsequent growth, stresses which are important enough, to produce a real plastic deformation of the metal. The deformation characteristics, its structural consequences and the effect of the thermal cycling in the transformation

  6. Comparative study of allotropic transformations of uranium and iron and of their structural consequences; Etude comparee des transformations allotropiques de l'uranium et du fer et de leurs consequences structurales

    Energy Technology Data Exchange (ETDEWEB)

    Lehr, P. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1957-06-15

    The {alpha} {r_reversible} {beta} phase change in pure uranium occurs, as in the case of the {alpha} {r_reversible} {gamma} transformation in pure iron, according to a nucleation and growth process. The development of the nuclei during these transformations have been studied by controlling in a furnace presenting a temperature gradient, a slow and regular movement of the interface between the two phase. In those conditions, the number of {alpha} nuclei so formed, is limited and the development of big crystals, elongated in the direction of the temperature gradient, or eventually single crystals are obtained. The crystallographic orientation of these iron or uranium crystals, and their degree of perfection have been analysed. The dilatometric behaviour of the uranium single crystals were studied on a fraction of their crystallographic orientation. The expansion coefficients along the three principal axes of the orthorhombic {alpha} cell were measured. By passing through the {alpha} {r_reversible} {beta} or {beta} {r_reversible} {gamma} transformation points of uranium, it is possible to suppress all prior textures presented by the metal. Especially, water-quenching of uranium from the {beta} phase, gives a grain sufficiently small in size and without preferential orientation, so that a statistic compensation of the expansion anisotropy of each grain can be obtained. The stresses, created by fast cooling in the transformation range, produce a recrystallization of the metal during further annealing in the {alpha} phase. The volume change, which accompanies the {alpha} {r_reversible} {beta} transformation in uranium, and the {alpha} {r_reversible} {gamma} transformation in iron, creates, during the formation of the new phase nuclei and their subsequent growth, stresses which are important enough, to produce a real plastic deformation of the metal. The deformation characteristics, its structural consequences and the effect of the thermal cycling in the transformation

  7. Study of transformations by annealing of the body. Centred cubic {gamma} phase of uranium-molybdenum alloys; Etude des transformations par revenu de la phase {gamma} cubique centree des alliages uranium-molybdene

    Energy Technology Data Exchange (ETDEWEB)

    Mikailoff, H [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1959-06-15

    By annealing at different temperatures, we have studied the transformations of the body centred cubic {gamma} phase for two alloys containing 6 and 10 per cent molybdenum by weight respectively. There is a return to the equilibrium state by formation of the stable {alpha} orthorhombic and {epsilon} ordered tetragonal phases, following two types of reaction: - pearlite transformation by nucleation and growth from the grain boundaries, preponderant when the annealing takes place at temperature above 400 deg. C, and identical for the two types of alloys. This reaction has already been studied by numerous authors, who have constructed the corresponding TTT curves, - transformation inside the grains of the quenched solid solution when annealing takes place at 400 deg. C or below: 6 per cent alloy - precipitation of fine a phase particles, followed by progressive ordering of the solid solution enriched in molybdenum, 10 per cent alloy - formation of small ordered regions and then a fine a phase precipitate. In the course of this work we have paid particular attention to the study of intragranular reactions after low-temperature annealing, the reactions involved in this case not having been explained up to the present. The {gamma} phase transformation has been studied by means of three techniques: micrography - microhardness tests - X-ray diffraction. (author) [French] Nous avons etudie les transformations par revenu a differentes temperatures, de la phase {gamma} cubique centree des alliages U-Mo trempes, pour deux alliages a 6 et a 10 pour cent de molybdene en poids. Il y a retour a l'etat d'equilibre par formation des phases stables {alpha} orthorhombique et quadratique ordonnee, suivant deux types de reactions: - transformation perlitique par germination et croissance a partir des joints de grains, preponderante lorsque le recuit a lieu a temperature superieure a 400 deg. C, et identique pour les deux types d'alliages. Cette reaction a deja ete etudiee par de nombreux

  8. A systematic study of finite BRST-BV transformations within W-X formulation of the standard and the Sp(2)-extended field-antifield formalism

    Energy Technology Data Exchange (ETDEWEB)

    Batalin, Igor A. [P.N. Lebedev Physical Institute, Moscow (Russian Federation); Tomsk State Pedagogical University, Tomsk (Russian Federation); Bering, Klaus [Masaryk University, Faculty of Science, Brno (Czech Republic); Lavrov, Peter M. [Tomsk State Pedagogical University, Tomsk (Russian Federation); National Research Tomsk State University, Tomsk (Russian Federation)

    2016-03-15

    Finite BRST-BV transformations are studied systematically within the W-X formulation of the standard and the Sp(2)-extended field-antifield formalism. The finite BRST-BV transformations are introduced by formulating a new version of the Lie equations. The corresponding finite change of the gauge-fixing master action X and the corresponding Ward identity are derived. (orig.)

  9. Pressure-induced transformations in glassy water: A computer simulation study using the TIP4P/2005 model

    Science.gov (United States)

    Wong, Jessina; Jahn, David A.; Giovambattista, Nicolas

    2015-08-01

    We study the pressure-induced transformations between low-density amorphous (LDA) and high-density amorphous (HDA) ice by performing out-of-equilibrium molecular dynamics (MD) simulations. We employ the TIP4P/2005 water model and show that this model reproduces qualitatively the LDA-HDA transformations observed experimentally. Specifically, the TIP4P/2005 model reproduces remarkably well the (i) structure (OO, OH, and HH radial distribution functions) and (ii) densities of LDA and HDA at P = 0.1 MPa and T = 80 K, as well as (iii) the qualitative behavior of ρ(P) during compression-induced LDA-to-HDA and decompression-induced HDA-to-LDA transformations. At the rates explored, the HDA-to-LDA transformation is less pronounced than in experiments. By studying the LDA-HDA transformations for a broad range of compression/decompression temperatures, we construct a "P-T phase diagram" for glassy water that is consistent with experiments and remarkably similar to that reported previously for ST2 water. This phase diagram is not inconsistent with the possibility of TIP4P/2005 water exhibiting a liquid-liquid phase transition at low temperatures. A comparison with previous MD simulation studies of SPC/E and ST2 water as well as experiments indicates that, overall, the TIP4P/2005 model performs better than the SPC/E and ST2 models. The effects of cooling and compression rates as well as aging on our MD simulations results are also discussed. The MD results are qualitatively robust under variations of cooling/compression rates (accessible in simulations) and are not affected by aging the hyperquenched glass for at least 1 μs. A byproduct of this work is the calculation of TIP4P/2005 water's diffusion coefficient D(T) at P = 0.1 MPa. It is found that, for T ≥ 210 K, D(T) ≈ (T - TMCT)-γ as predicted by mode coupling theory and in agreement with experiments. For TIP4P/2005 water, TMCT = 209 K and γ = 2.14, very close to the corresponding experimental values TMCT = 221 K

  10. Study on development of differential transformer for use in high-temperature environments

    International Nuclear Information System (INIS)

    Ara, Katsuyuki

    1983-11-01

    Today, in many fields of industrial science and technology, various efforts are being directed to the development of new technology aiming the technological inovation of the coming generation. Under these circumstances, new requirements are called for in instrumentation and measurement; one is the measurement at very severe environments such as high-temperature and high-pressure. Especially in the field of nuclear energy development, various kinds of measurements are needed under a high-temperature, high-pressure and high-radiation environments, and many sensors have been developed for such purposes. One of the most excellent heat-resisting sensors is the sensor based on and utilizing electromagnetic induction. Various electromagnetic sensors have been, therefore, developed and used in in-core environments of nuclear reactors. The author has been engaged in the development of differential transformers for use in in-core environments of Light Water Reactors: this paper compiles the results obtained through the development. (author)

  11. Kinetic study of olive oil degradation monitored by fourier transform infrared spectrometry. Application to oil characterization.

    Science.gov (United States)

    Román Falcó, Iván P; Grané Teruel, Nuria; Prats Moya, Soledad; Martín Carratalá, M Luisa

    2012-11-28

    A new approach for the determination of kinetic parameters of the cis/trans isomerization during the oxidation process of 24 virgin olive oils belonging to 8 different varieties is presented. The accelerated process of degradation at 100 °C was monitored by recording the Fourier transform infrared spectra. The parameters obtained confirm pseudo-first-order kinetics for the degradation of cis and the appearance of trans double bonds. The kinetic approach affords the induction time and the rate coefficient; these parameters are related to the fatty acid profile of the fresh olive oils. The data obtained were used to compare the oil stability of the samples with the help of multivariate statistical techniques. Fatty acid allowed a classification of the samples in five groups, one of them constituted by the cultivars with higher stability. Meanwhile, the kinetic parameters showed greater ability for the characterization of olive oils, allowing the classification in seven groups.

  12. High temperature Moessbauer study of order-disorder transformation in iron-aluminum alloys

    International Nuclear Information System (INIS)

    Oki, Kensuke; Yamamura, Akihiko; Kudo, Kazunao; Eguchi, Tetsuo

    1979-01-01

    Ordering process of iron rich Fe-Al alloys has been investigated at elevated temperatures by mean of Moessbauer spectroscopy. The observed spectra are analyzed to obtain the temperature dependences of the internal field, isomer shift and line width, and the results are discussed in connection with the ordering process. The alloy with 24.7 at% Al exhibits spectra, which are characteristic of the superposition of a single-line spectrum and a six-line one, originating from the ordered paramagnetic B2 or DO 3 state and disordered ferromagnetic α, respectively, and the results confirm the coexistence of α phase with B2 or DO 3 . The isomer shift of the paramagnetic component of the spectra shows discontinuous changes at the temperatures of transformation α reversible B2 and B2 reversible DO 3 . (author)

  13. Fourier transform infrared spectroscopic study of gamma irradiated SiO2 nanoparticles

    Science.gov (United States)

    Huseynov, Elchin; Garibov, Adil; Mehdiyeva, Ravan; Huseynova, Efsane

    2018-03-01

    In the present work, nano SiO2 particles are investigated before and after gamma irradiation (25, 50, 75, 100 and 200 kGy) using Fourier transform infrared (FTIR) spectroscopy method for the wavenumber between 400-4000 cm-1. It is found that as a result of spectroscopic analysis, five new peaks have appeared after gamma radiation. Two of new obtained peaks (which are located at 687 cm-1 and 2357 cm-1 of wavenumber) were formed as a result of gamma radiation interaction with Si-O bonds. Another three new peaks (peaks appropriate to 941, 2052 and 2357 cm-1 values of wavenumber) appear as a result of interaction of water with nano SiO2 particles after gamma irradiation. It has been defined as asymmetrical bending vibration, symmetrical bending vibration, symmetrical stretching vibration and asymmetrical stretching vibration of Si-O bonds appropriate to peaks.

  14. An in situ Fourier transform infrared spectroelectrochemical study on ethanol electrooxidation on Pd in alkaline solution

    Energy Technology Data Exchange (ETDEWEB)

    Fang, Xiang; Wang, Lianqin; Shen, Pei Kang [The State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275 (China); Cui, Guofeng [School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275 (China); Bianchini, Claudio [Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), via Madonna del Piano 10, 50019 Sesto Fiorentino (Italy)

    2010-03-01

    The mechanism of ethanol electrooxidation on a palladium electrode in alkaline solution (from 0.01 to 5 M NaOH) has been investigated by cyclic voltammetry and in situ Fourier transform infrared spectroelectrochemistry. The electrode performance has been found to depend on the pH of the fuel solution. The best performance was observed in 1 M NaOH solution (pH = 14), while the electrochemical activity decreased by either increasing or decreasing the NaOH concentration. In situ FTIR spectroscopic measurements showed the main oxidation product to be sodium acetate at NaOH concentrations higher than 0.5 M. The C-C bond cleavage of ethanol, put in evidence by the formation of CO{sub 2}, occurred at pH values {<=}13. In these conditions, however, the catalytic activity for ethanol oxidation was quite low. No CO formation was detected along the oxidation of ethanol by FTIR spectroscopy. (author)

  15. Japanese great pioneer and leader, Zenji Nishiyama, on studies of martensitic transformations

    Science.gov (United States)

    Shimizu, K.

    2003-10-01

    Professor Zenji Nishiyama passed away on March 12, 1991, at the age of 89. He was born on October 14, 1901, and so the last year was the centennial birthday anniversary. In such a occasion, his personality and academic achievements will be introduced, because he had been one of great leaders of the world-wide martensite community for a long time, as is well known. The introduction consists of his personal history and academic activities and achievements on martensitic transformations. In addition, some hidden stories will be introduced as to publication of the well-known Nishiyama's orientation relationship and of the crystal structure of a Cu-Al alloy martensite, and as to several works which were carried out during the 2nd world-war and so not published in English.

  16. Numerical Study of the Plasticity-Induced Stabilization Effect on Martensitic Transformations in Shape Memory Alloys

    Science.gov (United States)

    Junker, Philipp; Hempel, Philipp

    2017-12-01

    It is well known that plastic deformations in shape memory alloys stabilize the martensitic phase. Furthermore, the knowledge concerning the plastic state is crucial for a reliable sustainability analysis of construction parts. Numerical simulations serve as a tool for the realistic investigation of the complex interactions between phase transformations and plastic deformations. To account also for irreversible deformations, we expand an energy-based material model by including a non-linear isotropic hardening plasticity model. An implementation of this material model into commercial finite element programs, e.g., Abaqus, offers the opportunity to analyze entire structural components at low costs and fast computation times. Along with the theoretical derivation and expansion of the model, several simulation results for various boundary value problems are presented and interpreted for improved construction designing.

  17. Fuel and engine characterization study of catalytically cracked waste transformer oil

    KAUST Repository

    Prasanna Raj Yadav, S.; Saravanan, Chinnusamy G.; Vallinayagam, R.; Vedharaj, S.; Roberts, William L.

    2015-01-01

    This research work targets on the effective utilization of WTO (waste transformer oil) in a diesel engine and thereby, reducing the environmental problems caused by its disposal into open land. The novelty of the work lies in adoption of catalytic cracking process to chemically treat WTO, wherein waste fly ash has been considered as a catalyst for the first time. Interestingly, both the oil and catalyst used are waste products, enabling reduction in total fuel cost and providing additional benefit of effective waste management. With the considerable token that use of activated fly ash as catalyst requires lower reaction temperature, catalytic cracking was performed only in the range of 350-400°C. As a result of this fuel treatment process, the thermal and physical properties of CCWTO (catalytically cracked waste transformer oil), as determined by ASTM standard methods, were found to be agreeable for its use in a diesel engine. Further, FTIR analysis of CCWTO discerned the presence of essential hydrocarbons such as carbon and hydrogen. From the experimental investigation of CCWTO - diesel blends in a diesel engine, performance and combustion characteristics were shown to be improved, with a notable increase in BTE (brake thermal efficiency) and PHRR (peak heat release rate) for CCWTO 50 by 7.4% and 13.2%, respectively, than that of diesel at full load condition. In the same note, emissions such as smoke, HC (hydrocarbon) and CO (carbon monoxide) were noted to be reduced at the expense of increased NOx (nitrogen oxides) emission. © 2015 Elsevier Ltd. All rights reserved.

  18. Fuel and engine characterization study of catalytically cracked waste transformer oil

    KAUST Repository

    Prasanna Raj Yadav, S.

    2015-05-01

    This research work targets on the effective utilization of WTO (waste transformer oil) in a diesel engine and thereby, reducing the environmental problems caused by its disposal into open land. The novelty of the work lies in adoption of catalytic cracking process to chemically treat WTO, wherein waste fly ash has been considered as a catalyst for the first time. Interestingly, both the oil and catalyst used are waste products, enabling reduction in total fuel cost and providing additional benefit of effective waste management. With the considerable token that use of activated fly ash as catalyst requires lower reaction temperature, catalytic cracking was performed only in the range of 350-400°C. As a result of this fuel treatment process, the thermal and physical properties of CCWTO (catalytically cracked waste transformer oil), as determined by ASTM standard methods, were found to be agreeable for its use in a diesel engine. Further, FTIR analysis of CCWTO discerned the presence of essential hydrocarbons such as carbon and hydrogen. From the experimental investigation of CCWTO - diesel blends in a diesel engine, performance and combustion characteristics were shown to be improved, with a notable increase in BTE (brake thermal efficiency) and PHRR (peak heat release rate) for CCWTO 50 by 7.4% and 13.2%, respectively, than that of diesel at full load condition. In the same note, emissions such as smoke, HC (hydrocarbon) and CO (carbon monoxide) were noted to be reduced at the expense of increased NOx (nitrogen oxides) emission. © 2015 Elsevier Ltd. All rights reserved.

  19. Fuel and engine characterization study of catalytically cracked waste transformer oil

    International Nuclear Information System (INIS)

    Prasanna Raj Yadav, S.; Saravanan, C.G.; Vallinayagam, R.; Vedharaj, S.; Roberts, William L.

    2015-01-01

    Highlights: • Waste resources such as WTO and waste fly ash have been effectively harnessed. • WTO has been catalytically cracked using fly ash catalyst for the first time. • Characteristics of a diesel engine were evaluated for CCWTO-diesel blends. • BTE and PHRR were increased by 7.4% and 13.2%, respectively, for CCWTO 50. • HC and CO emissions were reduced for CCWTO 50 with the increased NO X emission. - Abstract: This research work targets on the effective utilization of WTO (waste transformer oil) in a diesel engine and thereby, reducing the environmental problems caused by its disposal into open land. The novelty of the work lies in adoption of catalytic cracking process to chemically treat WTO, wherein waste fly ash has been considered as a catalyst for the first time. Interestingly, both the oil and catalyst used are waste products, enabling reduction in total fuel cost and providing additional benefit of effective waste management. With the considerable token that use of activated fly ash as catalyst requires lower reaction temperature, catalytic cracking was performed only in the range of 350–400 °C. As a result of this fuel treatment process, the thermal and physical properties of CCWTO (catalytically cracked waste transformer oil), as determined by ASTM standard methods, were found to be agreeable for its use in a diesel engine. Further, FTIR analysis of CCWTO discerned the presence of essential hydrocarbons such as carbon and hydrogen. From the experimental investigation of CCWTO – diesel blends in a diesel engine, performance and combustion characteristics were shown to be improved, with a notable increase in BTE (brake thermal efficiency) and PHRR (peak heat release rate) for CCWTO 50 by 7.4% and 13.2%, respectively, than that of diesel at full load condition. In the same note, emissions such as smoke, HC (hydrocarbon) and CO (carbon monoxide) were noted to be reduced at the expense of increased NO X (nitrogen oxides) emission

  20. Multi-criteria decision analysis of energy system transformation pathways: A case study for Switzerland

    International Nuclear Information System (INIS)

    Volkart, Kathrin; Weidmann, Nicolas; Bauer, Christian; Hirschberg, Stefan

    2017-01-01

    Two recent political decisions are expected to frame the development of the Swiss energy system in the coming decades: the nuclear phase-out and the greenhouse gas (GHG) emission reduction target. To accomplish both of them, low-carbon technologies based on renewable energy and Carbon Capture and Storage (CCS) are expected to gain importance. The objective of the present work is to support prospective Swiss energy policy-making by providing a detailed sustainability analysis of possible energy system transformation pathways. For this purpose, the results of the scenario quantification with an energy system model are coupled with multi-criteria sustainability analysis. Two climate protection and one reference scenario are addressed, and the trade-offs between the scenarios are analysed based on a set of 12 interdisciplinary indicators. Implementing a stringent climate policy in Switzerland is associated with co-benefits such as less fossil resource use, less fatalities in severe accidents in the energy sector, less societal conflicts and higher resource autonomy. The availability and implementation of CCS allows for achieving the GHG emission reduction target at lower costs, but at the expense of a more fossil fuel-based energy system. - Highlights: • Three energy system transformation pathways for Switzerland are analysed. • A set of policy-relevant sustainability indicators are quantified for each pathway. • Implementing a stringent climate policy in Switzerland is associated with co-benefits. • In the CCS scenario fossil fuel use increases, but the total system costs are lower. • Fossil-fuelled transport substantially contributes to most of the addressed criteria.

  1. Probing atomic scale transformation of fossil dental enamel using Fourier transform infrared and nuclear magnetic resonance spectroscopy: a case study from the Tugen Hills (Rift Gregory, Kenya).

    Science.gov (United States)

    Yi, Haohao; Balan, Etienne; Gervais, Christel; Ségalen, Loïc; Roche, Damien; Person, Alain; Fayon, Franck; Morin, Guillaume; Babonneau, Florence

    2014-09-01

    A series of fossil tooth enamel samples was investigated by Fourier transform infrared (FTIR) spectroscopy, (13)C and (19)F magic-angle spinning nuclear magnetic resonance (MAS NMR) and scanning electron microscopy (SEM). Tooth remains were collected in Mio-Pliocene deposits of the Tugen Hills in Kenya. Significant transformations were observed in fossil enamel as a function of increasing fluorine content (up to 2.8wt.%). FTIR spectroscopy revealed a shift of the ν1 PO4 stretching band to higher frequency. The ν2 CO3 vibrational band showed a decrease in the intensity of the primary B-type carbonate signal, which was replaced by a specific band at 864cm(-1). This last band was ascribed to a specific carbonate environment in which the carbonate group is closely associated to a fluoride ion. The occurrence of this carbonate defect was consistently attested by the observation of two different fluoride signals in the (19)F NMR spectra. One main signal, at ∼-100ppm, is related to structural F ions in the apatite channel and the other, at -88ppm, corresponds to the composite defect. These spectroscopic observations can be understood as resulting from the mixture of two phases: biogenic hydroxylapatite (bioapatite) and secondary fluorapatite. SEM observations of the most altered sample confirmed the extensive replacement of the bioapatite by fluorapatite, resulting from the dissolution of the primary bioapatite followed by the precipitation of carbonate-fluorapatite. The ν2 CO3 IR bands can be efficiently used to monitor the extent of this type of bioapatite transformation during fossilization. Copyright © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

  2. Long-term batch study of sorption, transformation and extractability to characterize the fate of the veterinary antibiotic sulfadiazine

    Science.gov (United States)

    Sittig, Stephan; Kasteel, Roy; Groeneweg, Joost; Vereecken, Harry

    2010-05-01

    The occurrence of veterinary antibiotic substances in various environmental compartments is of growing concern. Once released into the environment (e.g. via manure), these organic substances can cause changes in the composition of microbial populations, provoke the development and spreading of resistance genes and finally reach the food chain. The substance under study is the veterinary antibiotic sulfadiazine (SDZ), which belongs to the chemical group of the sulfonamides. These compounds are widely applied in animal husbandry. There are hardly any studies on the macroscopic sorption and desorption behaviour in combination with transformation processes, particularly investigating the sorbed fraction. We are conducting long-term batch sorption experiments to characterize the partitioning between the liquid and the solid phases as well as formation of transformation products. A sequential extraction procedure enables us to analyse the composition of the various sorbed fractions. We applied 14C-labelled SDZ in aqueous solution to fresh soil, originating from an agricultural field (silty loam). Adsorption and desorption studies are conducted for the duration of 60 d and 80 d, respectively. Unique setups for single time-steps allow us to trace the development of the partition process between the liquid and the solid phase and also partitioning within the solid phase. The composition of these liquid phases concerning the parent substance and the transformation products is analyzed. Using Radio-HPLC we find at least five transformation products: 4-hydroxy-sulfadiazine (4-OH-SDZ), 4-(2-iminopyrimidin-1(2H)-yl)-aniline (An-SDZ) and additionally three yet unknown products. By means of a sequential extraction, differently strong bound fractions of the compound can be distinguished. Extractions consist of a mild method (0.01 M CaCl2-solution; 24 h) followed by a methanol extraction (4 h). Finally, a residual fraction is gained by microwave extraction at an elevated temperature

  3. Security Transformation

    National Research Council Canada - National Science Library

    Metz, Steven

    2003-01-01

    ... adjustment. With American military forces engaged around the world in both combat and stabilization operations, the need for rigorous and critical analysis of security transformation has never been greater...

  4. Landskabets transformation

    DEFF Research Database (Denmark)

    Munck Petersen, Rikke

    2005-01-01

    Seminaroplæg fra forskere. Faglige seminarer på KA, forår 2005. Belyser transformation af det danske landskab fysisk som holdningsmæssigt, samt hvordan phd-arbejdets egen proces håndterer den.......Seminaroplæg fra forskere. Faglige seminarer på KA, forår 2005. Belyser transformation af det danske landskab fysisk som holdningsmæssigt, samt hvordan phd-arbejdets egen proces håndterer den....

  5. Covariant Transform

    OpenAIRE

    Kisil, Vladimir V.

    2010-01-01

    The paper develops theory of covariant transform, which is inspired by the wavelet construction. It was observed that many interesting types of wavelets (or coherent states) arise from group representations which are not square integrable or vacuum vectors which are not admissible. Covariant transform extends an applicability of the popular wavelets construction to classic examples like the Hardy space H_2, Banach spaces, covariant functional calculus and many others. Keywords: Wavelets, cohe...

  6. Experimental studies on particle emissions from cruising ship, their characteristic properties, transformation and atmospheric lifetime in the marine boundary layer

    Directory of Open Access Journals (Sweden)

    A. Petzold

    2008-05-01

    Full Text Available Particle emissions from ship engines and their atmospheric transformation in the marine boundary layer (MBL were investigated in engine test bed studies and in airborne measurements of expanding ship plumes. During the test rig studies, detailed aerosol microphysical and chemical properties were measured in the exhaust gas of a serial MAN B&W seven-cylinder four-stroke marine diesel engine under various load conditions. The emission studies were complemented by airborne aerosol transformation studies in the plume of a large container ship in the English Channel using the DLR aircraft Falcon 20 E-5. Observations from emission studies and plume studies combined with a Gaussian plume dispersion model yield a consistent picture of particle transformation processes from emission to atmospheric processing during plume expansion. Particulate matter emission indices obtained from plume measurements are 8.8±1.0×1015(kg fuel−1 by number for non-volatile particles and 174±43 mg (kg fuel−1 by mass for Black Carbon (BC. Values determined for test rig conditions between 85 and 110% engine load are of similar magnitude. For the total particle number including volatile compounds no emission index can be derived since the volatile aerosol fraction is subject to rapid transformation processes in the plume. Ship exhaust particles occur in the size range Dp<0.3 μm, showing a bi-modal structure. The combustion particle mode is centred at modal diameters of 0.05 μm for raw emissions to 0.10 μm at a plume age of 1 h. The smaller-sized volatile particle mode is centred at Dp≤0.02 μm. From the decay of ship exhaust particle number concentrations in an expanding plume, a maximum plume life time of approx. 24 h is estimated for a well-mixed marine boundary layer.

  7. Aging study on carboxymethyl cellulose-coated zero-valent iron nanoparticles in water: Chemical transformation and structural evolution

    Energy Technology Data Exchange (ETDEWEB)

    Dong, Haoran, E-mail: dongh@hnu.edu.cn [College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082 (China); Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082 (China); Zhao, Feng; Zeng, Guangming; Tang, Lin; Fan, Changzheng; Zhang, Lihua; Zeng, Yalan; He, Qi; Xie, Yankai; Wu, Yanan [College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082 (China); Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082 (China)

    2016-07-15

    Highlights: • The chemical transformation and structural evolution of CMC-nZVI were investigated. • CMC could slow down the aging rate of nZVI and alter the species transformation. • Fe{sub 3}O{sub 4} and/or γ-Fe{sub 2}O{sub 3} are the dominant corrosion products of bare nZVI after aging. • γ-FeOOH is the primary corrosion product of CMC-nZVI after aging. - Abstract: To assess the long-term fate and the associated risks of nanoscale zero-valent iron (nZVI) used in the water remediation, it is essential to understand the chemical transformations during aging of nZVI in water. This study investigated the compositional and structural evolution of bare nZVI and carboxymethyl cellulose (CMC) coated nZVI in static water over a period of 90 days. Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy were used to characterize the corrosion products of nZVI and CMC-nZVI. Results show that both the structures and the compositions of the corrosion products change with the process of aging, but the coating of CMC could slow down the aging rate of nZVI (as indicated by the slower drop in Fe{sup 0} intensity in XRD pattern). For the bare nZVI, magnetite (Fe{sub 3}O{sub 4}) and/or maghemite (γ-Fe{sub 2}O{sub 3}) are the dominant corrosion products after 90 days of aging. However, for the CMC-nZVI, the core-shell spheres collapses to acicular-shaped structures after aging with crystalline lepidocrocite (γ-FeOOH) as the primary end product. Moreover, more lepidocrocite present in the corrosion products of CMC-nZVI with higher loading of CMC, which reveals that the CMC coating could influence the transformation of iron oxides.

  8. Transformation language integration based on profiles and higher order transformations

    NARCIS (Netherlands)

    Van Gorp, P.M.E.; Keller, A.; Janssens, D.; Gaševic, D.; Lämmel, R.; Van Wyk, Eric

    2009-01-01

    For about two decades, researchers have been constructing tools for applying graph transformations on large model transformation case studies. Instead of incrementally extending a common core, these competitive tool builders have repeatedly reconstructed mechanisms that were already supported by

  9. Changes in Maternal Serum Transforming Growth Factor Beta-1 during Pregnancy: A Cross-Sectional Study

    Directory of Open Access Journals (Sweden)

    Mandeep Singh

    2013-01-01

    Full Text Available Changes in circulating levels of maternal serum transforming growth factor beta-1 (TGF-β1, collected from 98 women (AGA at different gestational ages (10–38 weeks were measured and comparisons were made between levels in pregnant and nonpregnant controls and also between 10 women with small-for-gestational age (SGA and 7 with appropriate-for-gestational age (AGA fetuses. Maternal serum TGF-β1 levels at all stages of pregnancy were higher than those in normal healthy nonpregnant adults. The mean TGF-β1 levels in SGA pregnancies at 34-week gestation (32.5 + 3.2 ng/mL were significantly less than those in AGA pregnancies (39.2 + 9.8 ng/mL while at 38-week gestation, the levels were similar in the two groups (36.04 + 4.3 versus 36.7 + 7.0 ng/mL. This differential change in TGF-β1 levels is probably an important modulating factor in the aetiopathogenesis of abnormal intrauterine fetal growth.

  10. Comparative study of wine tannin classification using Fourier transform mid-infrared spectrometry and sensory analysis.

    Science.gov (United States)

    Fernández, Katherina; Labarca, Ximena; Bordeu, Edmundo; Guesalaga, Andrés; Agosin, Eduardo

    2007-11-01

    Wine tannins are fundamental to the determination of wine quality. However, the chemical and sensorial analysis of these compounds is not straightforward and a simple and rapid technique is necessary. We analyzed the mid-infrared spectra of white, red, and model wines spiked with known amounts of skin or seed tannins, collected using Fourier transform mid-infrared (FT-MIR) transmission spectroscopy (400-4000 cm(-1)). The spectral data were classified according to their tannin source, skin or seed, and tannin concentration by means of discriminant analysis (DA) and soft independent modeling of class analogy (SIMCA) to obtain a probabilistic classification. Wines were also classified sensorially by a trained panel and compared with FT-MIR. SIMCA models gave the most accurate classification (over 97%) and prediction (over 60%) among the wine samples. The prediction was increased (over 73%) using the leave-one-out cross-validation technique. Sensory classification of the wines was less accurate than that obtained with FT-MIR and SIMCA. Overall, these results show the potential of FT-MIR spectroscopy, in combination with adequate statistical tools, to discriminate wines with different tannin levels.

  11. A Fourier-Transform Infrared Study of Biochar Aging in Soils

    Science.gov (United States)

    Singh, B.; Fang, Y.; Johnston, C.T.

    2018-01-01

    We used diffuse reflectance Fourier-transform infrared (DR-FTIR) spectroscopy, X-ray diffraction (XRD), and chemical and isotopic analyses to characterize the light fraction of four contrasting soils (control and biocharamended soils) to determine changes in biochar properties after aging. Two Eucalyptus saligna Sm. wood biochars, produced at 450°C (B450) and 550°C (B550), were incubated separately in each of the four soils for up to 12 mo at 20, 40, and 60°C. Total C and isotopic (δ13C) methods were used to quantify the amounts of biochar C and native C mineralized during incubation. The DR-FTIR spectra of the light fraction showed distinct absorption bands representing native soil organic C, biochar C, and mineral constituents present in the soils; the mineral bands were consistent with XRD data of the clay fraction of the four soils. Analysis of the DR-FTIR spectra in the ν(C–H) bands showed that the ratio of the aromatic ν(C–H) bands systematically increased relative to the aliphatic ν(C–H) bands with increasing mineralization of biochar C in the B550 amended soils, and this relationship was unique for each soil type. In contrast, this relationship was not observed for the B450 amended soils that contained a relatively smaller proportion of aromatic C. PMID:29657354

  12. Key intermediates in nitrogen transformation during microwave pyrolysis of sewage sludge: a protein model compound study.

    Science.gov (United States)

    Zhang, Jun; Tian, Yu; Cui, Yanni; Zuo, Wei; Tan, Tao

    2013-03-01

    The nitrogen transformations with attention to NH3 and HCN were investigated at temperatures of 300-800°C during microwave pyrolysis of a protein model compound. The evolution of nitrogenated compounds in the char, tar and gas products were conducted. The amine-N, heterocyclic-N and nitrile-N compounds were identified as three important intermediates during the pyrolysis. NH3 and HCN were formed with comparable activation energies competed to consume the same reactive substances at temperatures of 300-800°C. The deamination and dehydrogenation of amine-N compounds from protein cracking contributed to the formation of NH3 (about 8.9% of Soy-N) and HCN (6.6%) from 300 to 500°C. The cracking of nitrile-N and heterocyclic-N compounds from the dehydrogenation and polymerization of amine-N generated HCN (13.4%) and NH3 (31.3%) between 500 and 800°C. It might be able to reduce the HCN and NH3 emissions through controlling the intermediates production at temperatures of 500-800°C. Copyright © 2013 Elsevier Ltd. All rights reserved.

  13. OH-initiated transformation and hydrolysis of aspirin in AOPs system: DFT and experimental studies.

    Science.gov (United States)

    He, Lin; Sun, Xiaomin; Zhu, Fanping; Ren, Shaojie; Wang, Shuguang

    2017-08-15

    Advanced oxidation processes (AOPs) are widely used in wastewater treatment of pharmaceutical and personal care products (PPCPs). In this work, the OH-initiated transformation as well as the hydrolysis of a typical PPCPs, aspirin, was investigated using density functional theory (DFT) calculations and laboratory experiments. For DFT calculations, the frontier electron densities and bond dissociation energies were analyzed. Profiles of the potential energy surface were constructed, and all the possible pathways were discussed. Additionally, rate constants for each pathway were calculated with transition state theory (TST) method. UV/H 2 O 2 experiments of aspirin were performed and degradation intermediates were identified by UPLC-MS-MS analysis. Different findings from previous experimental works were reported that the H-abstraction pathways at methyl position were dominated and OH-addition pathways on benzene ring were also favored. Meantime, hydroxyl ASA was confirmed as the main stable intermediate. Moreover, it was the first time to use DFT method to investigate the hydrolysis mechanisms of organic ester compound. Copyright © 2017 Elsevier B.V. All rights reserved.

  14. High resolution electron microscope study of the omega transformation in Zr--Nb alloys

    International Nuclear Information System (INIS)

    Chang, A.L.J.; Sass, S.L.; Krakow, W.

    1976-01-01

    High resolution direct lattice imaging and dark field electron microscopy were used to examine the omega phase transformation in Zr--Nb alloys. Direct lattice imaging demonstrated the existence of subvariants within an omega variant. The existence of an ordered sequence of subvariants, which is the basic premise of recent diffuse intensity calculations which seek to explain diffuse diffraction observations in high Nb content alloys, could not be checked because of the small size of the omega regions. In the low Nb content alloys dark field electron microscopy was used to show that the ω phase consists of large domains (100 to 200 A dia) the interior of which contains features that are 3 to 6 A dia. As the Nb content is increased the omega domains decrease in size until only 3 to 5 A images are observed in alloys containing 15 wt. percent Nb or more. The isolated images are present over the range of composition from 8 to 30 wt. percent Nb. Time sequence dark field micrographs show that these small images change with time. The diffuse ω reflections are believed due in part to the existence of a (111) linear detect, consisting of groups of (111) rows of atoms which are displaced from bcc to ω positions for short periods of time

  15. Study of Fourier transform spectrometer based on Michelson interferometer wave-meter

    Science.gov (United States)

    Peng, Yuexiang; Wang, Liqiang; Lin, Li

    2008-03-01

    A wave-meter based on Michelson interferometer consists of a reference and a measurement channel. The voice-coiled motor using PID means can realize to move in stable motion. The wavelength of a measurement laser can be obtained by counting interference fringes of reference and measurement laser. Reference laser with frequency stabilization creates a cosine interferogram signal whose frequency is proportional to velocity of the moving motor. The interferogram of the reference laser is converted to pulse signal, and it is subdivided into 16 times. In order to get optical spectrum, the analog signal of measurement channel should be collected. The Analog-to-Digital Converter (ADC) for measurement channel is triggered by the 16-times pulse signal of reference laser. So the sampling rate is constant only depending on frequency of reference laser and irrelative to the motor velocity. This means the sampling rate of measurement channel signals is on a uniform time-scale. The optical spectrum of measurement channel can be processed with Fast Fourier Transform (FFT) method by DSP and displayed on LCD.

  16. Positron lifetime studies of the hcp to fcc transformation induced by mechanical attrition of elemental titanium

    International Nuclear Information System (INIS)

    Manna, I.; Chattopadhyay, P.P.; Nandi, P.; Nambissan, P.M.G.

    2004-01-01

    Nanocrystallisation by planetary ball-milling of high purity elemental titanium (Ti) revealed a polymorphic transformation from its normal hexagonal close packed (hcp) structure to a face-centered cubic (fcc) phase. Positron lifetime measurements were carried out on samples collected after different hours of milling to characterize the defect structures at grain surfaces. With increasing hours of milling, the nanocrystalline grain size decreased and the positron lifetimes--one related to the annihilation at the grain surfaces and the other to that at the intergranular open volume domains--increased significantly due to the increased free volume at the trapping vacancy sites. However, between 5 to 10 hours of milling, the two lifetimes decreased before resuming increasing once again. This marked deviation from an otherwise expected continuous increase of positron lifetime coincided with structural rearrangement within the system bringing in an enhancement in the density of electrons. The repacking of atoms along the [0001] crystallographic direction could be a possibility for this observation. Positron radiation effects on the migration and agglomeration of nanoparticles are also discussed

  17. Disc piezoelectric ceramic transformers.

    Science.gov (United States)

    Erhart, Jirií; Půlpán, Petr; Doleček, Roman; Psota, Pavel; Lédl, Vít

    2013-08-01

    In this contribution, we present our study on disc-shaped and homogeneously poled piezoelectric ceramic transformers working in planar-extensional vibration modes. Transformers are designed with electrodes divided into wedge, axisymmetrical ring-dot, moonie, smile, or yin-yang segments. Transformation ratio, efficiency, and input and output impedances were measured for low-power signals. Transformer efficiency and transformation ratio were measured as a function of frequency and impedance load in the secondary circuit. Optimum impedance for the maximum efficiency has been found. Maximum efficiency and no-load transformation ratio can reach almost 100% and 52 for the fundamental resonance of ring-dot transformers and 98% and 67 for the second resonance of 2-segment wedge transformers. Maximum efficiency was reached at optimum impedance, which is in the range from 500 Ω to 10 kΩ, depending on the electrode pattern and size. Fundamental vibration mode and its overtones were further studied using frequency-modulated digital holographic interferometry and by the finite element method. Complementary information has been obtained by the infrared camera visualization of surface temperature profiles at higher driving power.

  18. Analytical Analysis and Case Study of Transient Behavior of Inrush Current in Power Transformer for Designing of Efficient Circuit Breakers

    Science.gov (United States)

    Harmanpreet, Singh, Sukhwinder; Kumar, Ashok; Kaur, Parneet

    2010-11-01

    Stability & security are main aspects in electrical power systems. Transformer protection is major issue of concern to system operation. There are many mall-trip cases of transformer protection are caused by inrush current problems. The phenomenon of transformer inrush current has been discussed in many papers since 1958. In this paper analytical analysis of inrush current in a transformer switched on dc and ac supply has been done. This analysis will help in design aspects of circuit breakers for better performance.

  19. A novel approach for in vitro studies applying electrical fields to cell cultures by transformer-like coupling.

    Science.gov (United States)

    Hess, R; Neubert, H; Seifert, A; Bierbaum, S; Hart, D A; Scharnweber, D

    2012-12-01

    The purpose of this study was to develop a new apparatus for in vitro studies applying low frequency electrical fields to cells without interfering side effects like biochemical reactions or magnetic fields which occur in currently available systems. We developed a non-invasive method by means of the principle of transformer-like coupling where the magnetic field is concentrated in a toroid and, therefore, does not affect the cell culture. Next to an extensive characterization of the electrical field parameters, initial cell culture studies have focused on examining the response of bone marrow-derived human mesenchymal stem cells (MSCs) to pulsed electrical fields. While no significant differences in the proliferation of human MSCs could be detected, significant increases in ALP activity as well as in gene expression of other osteogenic markers were observed. The results indicate that transformer-like coupled electrical fields can be used to influence osteogenic differentiation of human MSCs in vitro and can pose a useful tool in understanding the influence of electrical fields on the cellular and molecular level.

  20. The application of Fourier transform infrared microspectroscopy for the study of diseased central nervous system tissue.

    Science.gov (United States)

    Caine, Sally; Heraud, Philip; Tobin, Mark J; McNaughton, Donald; Bernard, Claude C A

    2012-02-15

    In the last two decades the field of infrared spectroscopy has seen enormous advances in both instrumentation and the development of bioinformatic methods for spectral analysis, allowing the examination of a large variety of healthy and diseased samples, including biological fluids, isolated cells, whole tissues, and tissue sections. The non-destructive nature of the technique, together with the ability to directly probe biochemical changes without the addition of stains or contrast agents, enables a range of complementary analyses. This review focuses on the application of Fourier transform infrared (FTIR) microspectroscopy to analyse central nervous system tissues, with the aim of understanding the biochemical and structural changes associated with neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, transmissible spongiform encephalopathies, multiple sclerosis, as well as brain tumours. Modern biospectroscopic methods that combine FTIR microspectroscopy with bioinformatic analysis constitute a powerful new methodology that can discriminate pathology from normal healthy tissue in a rapid, unbiased fashion, with high sensitivity and specificity. Notably, the ability to detect protein secondary structural changes associated with Alzheimer's plaques, neurons in Parkinson's disease, and in some spectra from meningioma, as well as in the animal models of Alzheimer's disease, transmissible spongiform encephalopathies, and multiple sclerosis, illustrates the power of this technology. The capacity to offer insight into the biochemical and structural changes underpinning aetio-pathogenesis of diseases in tissues provides both a platform to investigate early pathologies occurring in a variety of experimentally induced and naturally occurring central nervous system diseases, and the potential to evaluate new therapeutic approaches. Copyright © 2011 Elsevier Inc. All rights reserved.

  1. Measurement of breast milk intake using deuterium oxide and fourier transformed infrared spectrophotometer - a pilot study

    International Nuclear Information System (INIS)

    Adom, T.; Bansa, D.; Boatin, R.; Vuore, T.; Datohe, D.; Timpo, S.; Asamoa-Tutu, P.

    2011-01-01

    The measurement of breast milk intake of infants is essential to the estimation of nutrient requirements during infancy and lactation. The conventional method, test-weighing procedure for measuring breast milk is time consuming, most often inaccurate and may interfere with the mother's normal activities. A more practical and accurate method is isotope dilution using stable isotope-labelled water. The accuracy and ready availability of deuterium oxide (D 2 O) have led to its extensive use in measuring body composition and breast milk intake of infants. The D 2 O turnover method was field-tested in 13 lactating Ghanaian mother-baby pairs. Maternal and baby anthropometric measurements were made. Baby milk intake and maternal body composition were measured with the dose-to-mother method. Pre-dose samples of saliva were taken from each mother-baby pair. A measured D 2 O dose (30g) was administered orally to the mother. Post-dose saliva samples were collected from mother and baby on days 1, 2, 3, 4, 13, and 14. Samples were analysed using Fourier Transformed Infrared Spectrophotometer (FTIR). The mean ± SD maternal age was 24 ± 5 years. Babies were aged 3.5 months on the average and weighed 6.7 ± 0.7 kg. Mean milk intake of babies was 828 ± 132 ml/day with a range of 610 to 1040 ml/day. Maternal fat free mass and % body fat were 44.8 ± 5.3 kg, 23.1 ± 5.1 respectively. This non-invasive and convenient method has been used successfully to measure breast milk intake of Ghanaian infants. (au)

  2. Studies of the structure of insulin fibrils by Fourier transform infrared (FTIR) spectroscopy and electron microscopy.

    Science.gov (United States)

    Nielsen, L; Frokjaer, S; Carpenter, J F; Brange, J

    2001-01-01

    Fibril formation (aggregation) of insulin was investigated in acid media by visual inspection, transmission electron microscopy (TEM), and Fourier transform infrared (FTIR) spectroscopy. Insulin fibrillated faster in hydrochloric acid than in acetic acid at elevated temperatures, whereas the fibrillation tendencies were reversed at ambient temperatures. Electron micrographs showed that bovine insulin fibrils consisted of long fibers with a diameter of 5 to 10 nm and lengths of several microns. The fibrils appeared either as helical filaments (in hydrochloric acid) or arranged laterally in bundles (in acetic acid, NaCl). Freeze-thawing cycles broke the fibrils into shorter segments. FTIR spectroscopy showed that the native secondary structure of insulin was identical in hydrochloric acid and acetic acid, whereas the secondary structure of fibrils formed in hydrochloric acid was different from that formed in acetic acid. Fibrils of bovine insulin prepared by heating or agitating an acid solution of insulin showed an increased content of beta-sheet (mostly intermolecular) and a decrease in the intensity of the alpha-helix band. In hydrochloric acid, the frequencies of the beta-sheet bands depended on whether the fibrillation was induced by heating or agitation. This difference was not seen in acetic acid. Freeze-thawing cycles of the fibrils in hydrochloric acid caused an increase in the intensity of the band at 1635 cm(-1) concomitant with reduction of the band at 1622 cm(-1). The results showed that the structure of insulin fibrils is highly dependent on the composition of the acid media and on the treatment. Copyright 2001 Wiley-Liss Inc. and the American Pharmaceutical Association J Pharm Sci 90: 29-37, 2001

  3. Transformation of Digital Ecosystems

    DEFF Research Database (Denmark)

    Henningsson, Stefan; Hedman, Jonas

    2014-01-01

    the Digital Ecosystem Technology Transformation (DETT) framework for explaining technology-based transformation of digital ecosystems by integrating theories of business and technology ecosystems. The framework depicts ecosystem transformation as distributed and emergent from micro-, meso-, and macro- level......In digital ecosystems, the fusion relation between business and technology means that the decision of technical compatibility of the offering is also the decision of how to position the firm relative to the coopetive relations that characterize business ecosystems. In this article we develop...... coopetition. The DETT framework consists an alternative to the existing explanations of digital ecosystem transformation as the rational management of one central actor balancing ecosystem tensions. We illustrate the use of the framework by a case study of transformation in the digital payment ecosystem...

  4. Optical microscope study of the γ(FCC)ε(HC) martensitic transformation of a Fe-16%Mn-9%Cr-5%Si-4%Ni shape memory alloy

    International Nuclear Information System (INIS)

    Bergeon, N.; Guenin, G.

    1995-01-01

    The γ(FCC) ε(HC) transformation is studied by light optical microscopy and scanning electron microscopy in a polycrystalline Fe-Mn-Si-Cr-Ni shape memory alloy. Thermal and stress-induced martensites are both studied to point out differences. A color etching method permitted to clearly observe morphological evolutions during the transformation and its reversion. Deformations of a golden microgrid deposed on austenitic samples are observed by SEM during the transformation. This technic has led to point out microscopic differences concerning the two kinds of martensite. SEM results are used to explain light optical microscopy observations. (orig.)

  5. Study of the fibrinogen - fibrin transformation kinetics and modifications caused to this reaction by irradiation (X rays) of the fibrinogen solution

    International Nuclear Information System (INIS)

    Hollard, D.; Suscillon, M.; Marcille, G.; Rambaud, F.; Baloyan, M.

    1966-01-01

    The authors present a spectrophotometric method for studying the transformation fibrinogen - fibrin. This method has the advantage of drawing immediately in graph form the three, phases of this transformation: proteolysis or monomerization; polymerisation; clot stabilization. It is a simple, faithful and easily reproductive technic. Owing to this method, they studied modifications of this transformation due to irradiation of fibrinogen solution. Low doses (90 000 R/mn) prevent transverse polymerisation. To upper doses (180 000 R and more), the action of thrombin on fibrinogen does not give an organised clot but a lacteous and fragile gel. There is not here a coagulation in the physiological understanding. (author) [fr

  6. High-energy X-ray study of short range order and phase transformations in titanium-vanadium

    International Nuclear Information System (INIS)

    Ramsteiner, I.B.

    2005-01-01

    This work presents a study of configurational correlations and phase transformations in the binary alloy Ti-V, using high-energy X-ray diffraction. The experiments have been performed at the European Synchrotron Radiation Facility (ESRF) in Grenoble. The high-energy (60-100 keV) technique developed recently allows in-situ measurements on bulk material in transmission geometry. The first part of the thesis discusses multiple scattering effects which might occur with this method. These effects are experimentally verified and discussed. Special emphasis is put on the questions, whether they affect the results obtained with this method, and how they can be avoided. Understanding alloys on the most fundamental level requires knowledge about the atomic interaction potentials. Competing with entropy, these potentials determine the configurational short range order in a disordered alloy, which generates together with static and dynamic distortions the diffuse scattering. The thesis presents measurements and calculations of the diffuse scattering patterns of Ti-V. The calculations, taking into account configurational correlations, static distortions induced by atomic size mismatch and thermal diffuse scattering, agree with the experimental data. Structural transformations in Ti-V are carefully characterized using high-energy x-ray diffraction in combination with the complementary transmission electron microscopy (TEM). While the first technique allows to study the phenomena in-situ and time-resolved, TEM yields real space images and chemical information about the phases. Ti-V near the equiatomic composition is a beta-Ti-alloy. The body centered cubic beta phase is retained at room temperature by fast quenching. Aging the material below the phase transformation temperature, however, leads to the precipitation of hexagonal alpha titanium. Another transformation process confusing earlier works is identified as TiC formation from carbon impurities in the material. In addition

  7. Sustainable transformation

    DEFF Research Database (Denmark)

    Andersen, Nicolai Bo

    This paper is about sustainable transformation with a particular focus on listed buildings. It is based on the notion that sustainability is not just a question of energy conditions, but also about the building being robust. Robust architecture means that the building can be maintained and rebuilt......, that it can be adapted to changing functional needs, and that it has an architectural and cultural value. A specific proposal for a transformation that enhances the architectural qualities and building heritage values of an existing building forms the empirical material, which is discussed using different...... theoretical lenses. It is proposed that three parameters concerning the ꞌtransformabilityꞌ of the building can contribute to a more nuanced understanding of sustainable transformation: technical aspects, programmatic requirements and narrative value. It is proposed that the concept of ꞌsustainable...

  8. Transforming Conflict into Effective Action: A Case Study on the Effects of Anthropogenic Sound on Marine Mammals

    Science.gov (United States)

    Lewandowski, Jill K.

    Like many wicked environmental problems of our time, marine sound and its potential effects on marine mammals is characterized by high levels of scientific uncertainty, diversified values across many stakeholder groups, political and regulatory complexities, and a continually evolving ecological and social environment. Further, the history of conflict and the relationships between major actors has rooted the issue firmly in identity conflict where prejudices lead to avoidance of working together. What results is continuing controversy, failed management decisions, litigation and an increasing frustration by all parties on why a better solution cannot be found. Ultimately, the intractability of the issue is not about the science, nor will the science ever tame the issue on its own. Rather, the issue is intractable because of the conflict between people about the most appropriate path forward. It is then imperative to understand, address, and transform this conflict in order to move off the decision carousel toward improved conservation outcomes and sustainable decisions for all. This research used an explanatory case study approach to quantitatively and qualitatively investigate the context and reasoning underlying conflict on this issue. Three methods were used in order to triangulate the data, and thus add rigor, including: (1) a document review of 230 publications: (2) exploratory interviews with 10 collaborative action experts and semi-structured interviews with 58 marine mammals and sound stakeholders; and (3) participant review of selected analyses. Data elucidate how different stakeholder groups define the problem and potential solutions, how they see their role and view the role of other stakeholders, specific experiences that increased or decrease conflict, and design preferences for a collaborative effort. These data are combined with conflict transformation principles to provide recommendations for a collaborative, transformative framework designed to

  9. Effective Communication Practices during Organizational Transformation: A Benchmarking Study of the U.S. Automobile Industry and U.S. Naval Aviation Enterprise

    National Research Council Canada - National Science Library

    King, Cynthia L; Brook, Douglas A; Hartge, Timothy D

    2007-01-01

    .... Navy, the sponsor of the study, has been engaged in Enterprise transformation efforts for several years, introducing changes to improve combat readiness while simultaneously reducing costs and increasing efficiencies...

  10. Assessment of vocal cord nodules: a case study in speech processing by using Hilbert-Huang Transform

    Science.gov (United States)

    Civera, M.; Filosi, C. M.; Pugno, N. M.; Silvestrini, M.; Surace, C.; Worden, K.

    2017-05-01

    Vocal cord nodules represent a pathological condition for which the growth of unnatural masses on vocal folds affects the patients. Among other effects, changes in the vocal cords’ overall mass and stiffness alter their vibratory behaviour, thus changing the vocal emission generated by them. This causes dysphonia, i.e. abnormalities in the patients’ voice, which can be analysed and inspected via audio signals. However, the evaluation of voice condition through speech processing is not a trivial task, as standard methods based on the Fourier Transform, fail to fit the non-stationary nature of vocal signals. In this study, four audio tracks, provided by a volunteer patient, whose vocal fold nodules have been surgically removed, were analysed using a relatively new technique: the Hilbert-Huang Transform (HHT) via Empirical Mode Decomposition (EMD); specifically, by using the CEEMDAN (Complete Ensemble EMD with Adaptive Noise) algorithm. This method has been applied here to speech signals, which were recorded before removal surgery and during convalescence, to investigate specific trends. Possibilities offered by the HHT are exposed, but also some limitations of decomposing the signals into so-called intrinsic mode functions (IMFs) are highlighted. The results of these preliminary studies are intended to be a basis for the development of new viable alternatives to the softwares currently used for the analysis and evaluation of pathological voice.

  11. Assessment of vocal cord nodules: a case study in speech processing by using Hilbert-Huang Transform

    International Nuclear Information System (INIS)

    Civera, M; Surace, C; Filosi, C M; Silvestrini, M; Pugno, N M; Worden, K

    2017-01-01

    Vocal cord nodules represent a pathological condition for which the growth of unnatural masses on vocal folds affects the patients. Among other effects, changes in the vocal cords’ overall mass and stiffness alter their vibratory behaviour, thus changing the vocal emission generated by them. This causes dysphonia, i.e. abnormalities in the patients’ voice, which can be analysed and inspected via audio signals. However, the evaluation of voice condition through speech processing is not a trivial task, as standard methods based on the Fourier Transform, fail to fit the non-stationary nature of vocal signals. In this study, four audio tracks, provided by a volunteer patient, whose vocal fold nodules have been surgically removed, were analysed using a relatively new technique: the Hilbert-Huang Transform (HHT) via Empirical Mode Decomposition (EMD); specifically, by using the CEEMDAN (Complete Ensemble EMD with Adaptive Noise) algorithm. This method has been applied here to speech signals, which were recorded before removal surgery and during convalescence, to investigate specific trends. Possibilities offered by the HHT are exposed, but also some limitations of decomposing the signals into so-called intrinsic mode functions (IMFs) are highlighted. The results of these preliminary studies are intended to be a basis for the development of new viable alternatives to the softwares currently used for the analysis and evaluation of pathological voice. (paper)

  12. Narrative pedagogy with evolving case study--A transformative approach to gerontic nursing practice for undergraduate nursing students.

    Science.gov (United States)

    Laver, Shaorn; Croxon, Lyn

    2015-09-01

    Engaging nursing students in the complexities of care across community, acute, rehabilitation and residential aged care settings is challenging. Equally challenging is conceptualising and promoting diverse and comprehensive health assessments across care settings that reflect clinical reality, inform clinical decision making, traverse theory and practice, and transform clinical practice knowledge. This article describes the use of narrative and evolving case study as a teaching-learning tool utilised by the authors in a third year undergraduate gerontic nursing subject in a pre-service nursing degree at a rural university. Principles of transformative learning and strengths based nursing were drawn upon in the development of the case study. The aim of the approach was to draw on embedded knowledge and the experiences of students and academics from assorted practice settings to facilitate understanding of the lived experiences of an older community dwelling couple. Using social learning strategies students were encouraged to analyse and think critically and creatively about the situations they were presented with. They identified possible solutions that would be acceptable to the couple. Building on the older couple's strengths, achievements and personal social capital, the aim was to develop a positive paradigm for health and the way older people are viewed by nursing students. Copyright © 2015 Elsevier Ltd. All rights reserved.

  13. Návrh zásobníku na sypký vápenný hydrát

    OpenAIRE

    Perna, Marek

    2009-01-01

    Tato diplomová práce řeší návrh hlubokého zásobníku na sypký vápenný hydrát pro technologická zařízení čistíren odpadních vod. Je zde proveden rozbor volby typu a konstrukce zásobníku, návrh rozměrů a pevnostní výpočet zásobníku. Je zde popsána možnost vzniku klenby při vyprazdňování a její potlačení pomocí aktivních a pasivních prvků napomáhající toku. Popis aktivních a pasivních stavů napjatosti materiálu v zásobníku. This diploma thesis is solving systems design of silo for a powdery li...

  14. Green Energy-Industrial Innovation: A Comparative Study of Green Energy Transformations in Northern Europe

    Energy Technology Data Exchange (ETDEWEB)

    Eikeland, Per Ove; Christiansen, Atle Christer; Koefoed, Anne Louise; Midttun, Atle; Tangen, Kristian

    1999-07-01

    green energy-industrial innovation as stages of technological innovation and industrial and institutional transformation over time. Following Aldrich 1999, green innovation in the energy system is, thus, seen as a process involving variation, selection, retention and diffusion, and struggle over scarce resources. (author)

  15. Green Energy-Industrial Innovation: A Comparative Study of Green Energy Transformations in Northern Europe

    International Nuclear Information System (INIS)

    Eikeland, Per Ove; Christiansen, Atle Christer; Koefoed, Anne Louise; Midttun, Atle; Tangen, Kristian

    1999-01-01

    green energy-industrial innovation as stages of technological innovation and industrial and institutional transformation over time. Following Aldrich 1999, green innovation in the energy system is, thus, seen as a process involving variation, selection, retention and diffusion, and struggle over scarce resources. (author)

  16. Hot Spot Temperature and Grey Target Theory-Based Dynamic Modelling for Reliability Assessment of Transformer Oil-Paper Insulation Systems: A Practical Case Study

    Directory of Open Access Journals (Sweden)

    Lefeng Cheng

    2018-01-01

    Full Text Available This paper develops a novel dynamic correction method for the reliability assessment of large oil-immersed power transformers. First, with the transformer oil-paper insulation system (TOPIS as the target of evaluation and the winding hot spot temperature (HST as the core point, an HST-based static ageing failure model is built according to the Weibull distribution and Arrhenius reaction law, in order to describe the transformer ageing process and calculate the winding HST for obtaining the failure rate and life expectancy of TOPIS. A grey target theory based dynamic correction model is then developed, combined with the data of Dissolved Gas Analysis (DGA in power transformer oil, in order to dynamically modify the life expectancy calculated by the built static model, such that the corresponding relationship between the state grade and life expectancy correction coefficient of TOPIS can be built. Furthermore, the life expectancy loss recovery factor is introduced to correct the life expectancy of TOPIS again. Lastly, a practical case study of an operating transformer has been undertaken, in which the failure rate curve after introducing dynamic corrections can be obtained for the reliability assessment of this transformer. The curve shows a better ability of tracking the actual reliability level of transformer, thus verifying the validity of the proposed method and providing a new way for transformer reliability assessment. This contribution presents a novel model for the reliability assessment of TOPIS, in which the DGA data, as a source of information for the dynamic correction, is processed based on the grey target theory, thus the internal faults of power transformer can be diagnosed accurately as well as its life expectancy updated in time, ensuring that the dynamic assessment values can commendably track and reflect the actual operation state of the power transformers.

  17. The Influences of Transformational Leaderships on Employees Performance (A Study of the Economics and Business Faculty Employee at University of Muhammadiyah Malang)

    OpenAIRE

    Kamel Saleh Khalifa Elgelal; Noermijati Noermijati

    2015-01-01

    This study aims at investigating the effect of direct transformational leadership on employee motivation, jobs satisfaction, and employee performance. Then investigating the effect of direct employee satisfaction and motivation on employee job performance and employee's performance, and to know that job satisfaction gives direct influence on employee performance. Than in this study also investigates the influence of indirect transformational leadership on employee performance through employee...

  18. Transformations in destination texture

    DEFF Research Database (Denmark)

    Gyimóthy, Szilvia

    2018-01-01

    This article takes heterogeographical approaches to understand Bollywood-induced destination transformations in Switzerland. Positioned within the theoretical field of mediatized mobility, the study contextualizes Bollywood-induced tourism in Europe the concept of texture. Textural analysis (base...

  19. Matrices and transformations

    CERN Document Server

    Pettofrezzo, Anthony J

    1978-01-01

    Elementary, concrete approach: fundamentals of matrix algebra, linear transformation of the plane, application of properties of eigenvalues and eigenvectors to study of conics. Includes proofs of most theorems. Answers to odd-numbered exercises.

  20. Sustainable transformation

    DEFF Research Database (Denmark)

    Andersen, Nicolai Bo

    This paper is about sustainable transformation with a particular focus on listed buildings. It is based on the notion that sustainability is not just a question of energy conditions, but also about the building being robust. Robust architecture means that the building can be maintained and rebuil...