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Sample records for two-factor study process

  1. The Revised Two-Factor Study Process Questionnaire (R-SPQ-2F): Exploratory and Confirmatory Factor Analyses at Item Level

    Science.gov (United States)

    Justicia, Fernando; Pichardo, M. Carmen; Cano, Francisco; Berben, A. B. G.; De la Fuente, Jesus

    2008-01-01

    The underlying structure of the Revised Two Factor version of the Study Process Questionnaire (R-SPQ-2F), a 20-item instrument for the evaluation of students' approaches to learning (SAL), was examined at item level using two independent groups of undergraduate students enrolled in the first (n = 314) and last (n = 522) years of their studies. The…

  2. The Revised Two-Factor Study Process Questionnaire (R-SPQ-2F): Exploratory and Confirmatory Factor Analyses at Item Level

    Science.gov (United States)

    Justicia, Fernando; Pichardo, M. Carmen; Cano, Francisco; Berben, A. B. G.; De la Fuente, Jesus

    2008-01-01

    The underlying structure of the Revised Two Factor version of the Study Process Questionnaire (R-SPQ-2F), a 20-item instrument for the evaluation of students' approaches to learning (SAL), was examined at item level using two independent groups of undergraduate students enrolled in the first (n = 314) and last (n = 522) years of their studies. The…

  3. Examining the cross-cultural sensitivity of the Revised Two-Factor Study Process Questionnaire (R-SPQ-2F and validation of a Dutch version.

    Directory of Open Access Journals (Sweden)

    Ann Stes

    Full Text Available The Revised Two-Factor Study Process Questionnaire (R-SPQ-2F is used to examine students' study approaches in higher education. The questionnaire assumes to measure two factors: a deep and a surface study approach. Analyses into the validity and reliability of the original English R-SPQ-2F yielded positive results. In this study, we examined the degree to which these positive results can also be found for the Dutch version that we developed. By comparing our results with the results of earlier studies in different cultures, we conclude cross-cultural sensitivity is an important point to be borne in mind when using the R-SPQ-2F. Our research supports the validity and reliability of our Dutch version of the R-SPQ-2F.

  4. Assessing the reliability and validity of the Revised Two Factor Study Process Questionnaire (R-SPQ2F in Ghanaian medical students

    Directory of Open Access Journals (Sweden)

    Victor Mogre

    2014-08-01

    Full Text Available Purpose: We investigated the validity and reliability of the Revised Two Factor Study Process Questionnaire (R-SPQ2F in preclinical students in Ghana. Methods: The R-SPQ2F was administered to 189 preclinical students of the University for Development Studies, School of Medicine and Health Sciences. Both descriptive and inferential statistics with Cronbach’s alpha test and factor analysis were done. Results: The mean age of the students was 22.69 ± 0.18 years, 60.8% (n = 115 were males and 42.3% (n = 80 were in their second year of medical training. The students had higher mean deep approach scores (31.23 ± 7.19 than that of surface approach scores (22.62 ± 6.48. Findings of the R-SPQ2F gave credence to a solution of two-factors indicating deep and surface approaches accounting for 49.80% and 33.57%, respectively, of the variance. The scales of deep approach (Cronbach’s alpha, 0.80 and surface approach (Cronbach’s alpha, 0.76 and their subscales demonstrated an internal consistency that was good. The factorial validity was comparable to other studies. Conclusion: Our study confirms the construct validity and internal consistency of the R-SPQ2F for measuring approaches to learning in Ghanaian preclinical students. Deep approach was the most dominant learning approach among the students. The questionnaire can be used to measure students’ approaches to learning in Ghana and in other African countries.

  5. Employing Two Factor Authentication Mechanisms: A Case Study

    Science.gov (United States)

    Lawrence, Cameron; Fulton, Eric; Evans, Gerald; Firth, David

    2014-01-01

    This case study examines the life of a digital native who has her online accounts hacked, passwords reset, and is locked out of important online resources including her university email account and Facebook. Part one of the case study examines how the hack was perpetrated and the fallout of losing control of one's digital identity. Part two of the…

  6. Studying Term Structure of SHIBOR with the Two-Factor Vasicek Model

    Directory of Open Access Journals (Sweden)

    Chaoqun Ma

    2014-01-01

    Full Text Available With the development of the Chinese interest rate market, SHIBOR is playing an increasingly important role. Based on principal component analysing SHIBOR, a two-factor Vasicek model is established to portray the change in SHIBOR with different terms. And parameters are estimated by using the Kalman filter. The model is also used to fit and forecast SHIBOR with different terms. The results show that two-factor Vasicek model fits SHIBOR well, especially for SHIBOR in terms of three months or more.

  7. Two-factor authentication

    CERN Document Server

    Stanislav, Mark

    2015-01-01

    During the book, readers will learn about the various technical methods by which two-factor authentication is implemented, security concerns with each type of implementation, and contextual details to frame why and when these technologies should be used. Readers will also be provided with insight about the reasons that two-factor authentication is a critical security control, events in history that have been important to prove why organization and individual would want to use two factor, and core milestones in the progress of growing the market.

  8. A Two-Factor Model of Temperament

    OpenAIRE

    Evans, David E.; Rothbart, Mary K.

    2009-01-01

    The higher order structure of temperament was examined in two studies using the Adult Temperament Questionnaire. Because previous research showed robust levels of convergence between Rothbart’s constructs of temperament and the Big Five factors, we hypothesized a higher order two-factor model of temperament based on Digman’s higher order two-factor model of personality traits derived from factor analysis of the Big Five factors. Study 1 included 258 undergraduates. Digman’s model did not fit ...

  9. Two-factor experimental study on cutting force of sawing Wulian red granite with diamond circular saw%金刚石圆锯片锯切花岗石的切削力双因素实验研究

    Institute of Scientific and Technical Information of China (English)

    夏继梅

    2011-01-01

    Based on two-factor experiment of sawing Wulian red granite with diamond circular saw, the relation between cutting force with cutting speed and feed rate was studied. Through the range analysis, the feed rate is the main factor that influenced the cutting force of Fx, Fy and Fx. The research shows that the cutting forces are basically reduced with the increase of cutting speed and aggrandized with the increase of feed rate. The mathematical models are concluded by regression analysis, it is the theoretical foundation for prediction of cutting forces according to the processing parameters.%基于金刚石圆锯片锯切五莲红花岗石的双因素实验,对切削速度和进给速度与切削力的关系进行研究.通过极差分析和趋势图得出进给速度是影响切削力Fx、Fy、Fz的主要因素,切削力随切削速度的增大而减小,随进给速度的增大而增大.通过回归分析建立了切削力数学模型,为生产中根据给定的加工参数来预测切削力提供了理论支持.

  10. Two-Factor Cancelable Biometrics Authenticator

    Institute of Scientific and Technical Information of China (English)

    Ying-Han Pang; Andrew T. B. J; David N. C. L

    2007-01-01

    Biometrics-based authentication system offers advantages of providing high reliability and accuracy.However,the contemporary authentication system is impuissance to compromise.If a biometrics data is compromised, it cannot be replaced and rendered unusable.In this paper, a cancelable biometrics-based authenticator is proposed to solve this irrevocability issue.The proposed approach is a two-factor authentication system, which requires both of the random data and facial feature in order to access the system.In this system, tokenized pseudo-random data is coupled with moment-based facial feature via inner product algorithm.The output of the product is then discretized to generate a set of private binary code, coined as 2factor-Hashing code, which is acted as verification key.If this biometrics-based verification key is compromised, a new one can be issued by replacing a different set of random number via token replacement.Then, the compromised one is rendered completely useless.This feature offers an extra protection layer against biometrics fabrication since the verification code is replaceable.Experimental results demonstrate that the proposed system provides zero Equal Error Rate in which there is a clear separation in between the genuine and the imposter distribution populations.

  11. Entrepreneurship and Process Studies

    DEFF Research Database (Denmark)

    Hjorth, Daniel; Holt, Robin; Steyaert, Chris

    2015-01-01

    Process studies put movement, change and flow first; to study processually is to consider the world as restless, something underway, becoming and perishing, without end. To understand firms processually is to accept but also – and this is harder perhaps – to absorb this fluidity, to treat...... a variable as just that, a variable. The resonance with entrepreneurship studies is obvious. If any field is alive to, and fully resonant with, a processual understanding of, for example, the creation of firms, it is entrepreneurship studies. This special issue is an attempt to consider the promise...... and potential of processual approaches to studying, researching and practising entrepreneurship. The articles in the issue attest to an increasing sensitivity to processual thinking. We argue that appreciating entrepreneurial phenomena processually opens up the field to an understanding of entrepreneurship...

  12. Study on Glulam Process

    Institute of Scientific and Technical Information of China (English)

    PENG Limin; WANG Haiqing; HE Weili

    2006-01-01

    This paper selected lumbers of Manchurian ash (Fraxinus rnandshurica), Manchurian walnut (Juglans mandshuricd) and Spruce (Picea jezoensis vai.kornamvii) for manufacturing glulam with water-borne polymeric-isocyanate adhesive to determine process variables. The process variables that include specific pressure, pressing time and adhesive application amount influencing the shear strength of the glulam, were investigated through the orthogonal test. The results indicated that optimum process variables for glulam manufacturing were as follows: Specific pressure of 1.5 MPa for Spruce and 2,0 MPa both for Manchurian ash and Manchurian walnut, pressing time of 60 min and adhesive application amount of 250 g/m2.

  13. Satisfiers and Dissatisfiers: A Two-Factor Model for Website Design and Evaluation.

    Science.gov (United States)

    Zhang, Ping; von Dran, Gisela M.

    2000-01-01

    Investigates Web site design factors and their impact from a theoretical perspective. Presents a two-factor model that can guide Web site design and evaluation. According to the model, there are two types of design factors: hygiene and motivator. Results showed that the two-factor model provides a means for Web-user interface studies. Provides…

  14. 公务员职业倦怠现象探析——基于双因素理论的视角%The Study of Civil Servants' Job Burnout Based on Two -factors Theory

    Institute of Scientific and Technical Information of China (English)

    缪国书; 许慧慧

    2012-01-01

    本文阐述了当前公务员职业倦怠的内涵、现状以及危害,认为公务员职业倦怠主要涉及的是公务员个体与工作之间的不协调关系;其次,基于"双因素"的理论激励角度分析,认为工作的挑战性、缺乏竞争激励等因素导致了公务员职业倦怠现象的发生;最后,从"双因素"理论的激励因素六个维度引入工作特征模型,提出了具有激励作用的工作以及建立竞争性的激励机制等纾解公务员职业倦怠的对策。%This paper at first expounds the definition, status and risk of current civil servants' burnout; moreover, it considers that civil servants' burnout mainly relates to the uncoordinated relationship between civil servants as an individual and their work. Then, based on the thought of people - orientation and starting from the view of incentive failure, the writer thinks the challenge of work and the lack of incentive promotion cause the civil servants' burnout. Finally, from the six dimen- sions of motivation in Two Factor Theory, the writer presents some measures to relieve the burnout phenomenon correspond- ingly, such as introducing a job characteristics model, and establishing a competitive promotion mechanism.

  15. Studies on process synthesis and process integration

    OpenAIRE

    Fien, Gert-Jan A. F.

    1994-01-01

    This thesis discusses topics in the field of process engineering that have received much attention over the past twenty years: (1) conceptual process synthesis using heuristic shortcut methods and (2) process integration through heat-exchanger networks and energy-saving power and refrigeration systems. The shortcut methods for conceptual process synthesis presented in Chapter 2, utilize Residue Curve Maps in ternary diagrams and are illustrated with examples of processes...

  16. Studying through the Bologna process

    DEFF Research Database (Denmark)

    Sarauw, Laura Louise

    Studying through the Bologna Process – alternative approaches to studying large-scale policy reforms / Laura Louise Sarauw (University of Aarhus). National perspective: EU, 47 member countries of the Bologna Process The presentation revolves around a series of methodological questions about...... to open the floor for a critical discussion of value of the latter, I draw on my recent studies of the Bologna process as a multiplicity of happenings which radiate in different directions and involve a multiplicity of competing claims and contestations (Sarauw, 2011, 2013). Bibliography: Latour, B. (2005....... Shore and D. Pero (2011), Policy worlds. Anthropology and the Analysis of Contemporary Power, Berghahn Books, 87-104....

  17. The serenity of the meditating mind: a cross-cultural psychometric study on a two-factor higher order structure of mindfulness, its effects, and mechanisms related to mental health among experienced meditators.

    Directory of Open Access Journals (Sweden)

    Ulrich S Tran

    Full Text Available OBJECTIVE: To investigate the psychometric and structural properties of the Five Facets Mindfulness Questionnaire (FFMQ among meditators, to develop a short form, and to examine associations of mindfulness with mental health and the mechanisms of mindfulness. METHODS: Two independent samples were used, a German (n = 891 and a Spanish (n = 393 meditator sample, practicing various meditation styles. Structural and psychometric properties of the FFMQ were investigated with multigroup confirmatory factor analysis and exploratory structural equation modeling. Associations with mental health and mechanisms of mindfulness were examined with path analysis. RESULTS: The derived short form broadly matched a previous item selection in samples of non-meditators. Self-regulated Attention and Orientation to Experience governed the facets of mindfulness on a higher-order level. Higher-order factors of mindfulness and meditation experience were negatively associated with symptoms of depression and anxiety, and perceived stress. Decentering and nonattachment were the most salient mechanisms of mindfulness. Aspects of emotion regulation, bodily awareness, and nonattachment explained the effects of mindfulness on depression and anxiety. CONCLUSIONS: A two-component conceptualization for the FFMQ, and for the study of mindfulness as a psychological construct, is recommended for future research. Mechanisms of mindfulness need to be examined in intervention studies.

  18. Putting Herzberg's Two Factor Theory of Motivation in Perspective.

    Science.gov (United States)

    May, Charles R.; Decker, Robert H.

    1988-01-01

    Explores challenges to Frederick Herzberg's Two Factor Theory of Motivation--a required concept in many administrator preparation programs. Herzberg used modified critical incident (or self-reporting) techniques to illustrate that job satisfaction and dissatisfaction occupied different continua and were not opposed to each other. Criticisms, study…

  19. Putting Herzberg's Two Factor Theory of Motivation in Perspective.

    Science.gov (United States)

    May, Charles R.; Decker, Robert H.

    1988-01-01

    Explores challenges to Frederick Herzberg's Two Factor Theory of Motivation--a required concept in many administrator preparation programs. Herzberg used modified critical incident (or self-reporting) techniques to illustrate that job satisfaction and dissatisfaction occupied different continua and were not opposed to each other. Criticisms, study…

  20. Internet Banking Two-Factor Authentication using Smartphones

    Directory of Open Access Journals (Sweden)

    Costin Andrei Soare

    2012-03-01

    Full Text Available This paper describes a method of implementing two-factor authentication using smart phones as software tokens. The proposed system will use the mobile phone as a software token and generate unique one time passwords (OTP that will be used when authenticating to an Internet Banking application. The tokens can also serve as a method of signing online money orders. We will prove in this article the cost efficiency of the proposed architecture for both consumers and companies.

  1. Time process study with UML.

    Science.gov (United States)

    Shiki, N; Ohno, Y; Fujii, A; Murata, T; Matsumura, Y

    2009-01-01

    We propose a new business-process analysis approach, Time Process Study (TPS), which comprises process analysis and time and motion studies (TMS). TPS offsets weaknesses of TMS; the cost of field studies and the difficulties in applying them to tasks whose time span differs from those of usual tasks. In TPS, the job procedures are first displayed using a unified modeling language (UML). Next, time and manpower for each procedure are studied through interviews and TMS, and the information is appended to the UML diagram. We applied TPS in the case of a hospital-based cancer registry (HCR) of a university hospital to clarify the work procedure and the time required, and investigated TPS's availability. Meetings for the study were held once a month from July to September in 2008, and one inquirer committed a total of eight hours to the hospital survey. TPS revealed that HCR consisted of three tasks and 14 functions. The registration required 123 hours/month/person, the quality control required 6.5 hours/ 6 months/person and filing data into the population-based cancer registry required 0.5 hours/6 months/person. Of the total tasks involved in registration, 116.5 hours/month/person were undertaken by a registration worker, which shows the necessity of employing one full-time staff. With TPS, it is straightforward to share the concept among the study-team because the job procedure is first displayed using UML. Therefore, it requires a few workload to conduct TMS and interview. The obtained results were adopted for the review of staff assignment of HCR by Japanese government.

  2. The applicability of Herzberg's two-factor theory to the job satisfaction of Malaysian polytechnic instructors

    OpenAIRE

    Sipon, Ahamad B.

    1996-01-01

    The purpose of this study were: 1) to determine whether support exists for Herzberg's two factor theory in an educational setting in Malaysia; 2) to determine and describe the job satisfaction of polytechnic instructors in Malaysia and 3) to examine the relationships between job satisfaction and selected personal charactoristics contextual characterisitcs, and students perceptions of instructors' teaching effectiveness.

  3. Solutions of two-factor models with variable interest rates

    Science.gov (United States)

    Li, Jinglu; Clemons, C. B.; Young, G. W.; Zhu, J.

    2008-12-01

    The focus of this work is on numerical solutions to two-factor option pricing partial differential equations with variable interest rates. Two interest rate models, the Vasicek model and the Cox-Ingersoll-Ross model (CIR), are considered. Emphasis is placed on the definition and implementation of boundary conditions for different portfolio models, and on appropriate truncation of the computational domain. An exact solution to the Vasicek model and an exact solution for the price of bonds convertible to stock at expiration under a stochastic interest rate are derived. The exact solutions are used to evaluate the accuracy of the numerical simulation schemes. For the numerical simulations the pricing solution is analyzed as the market completeness decreases from the ideal complete level to one with higher volatility of the interest rate and a slower mean-reverting environment. Simulations indicate that the CIR model yields more reasonable results than the Vasicek model in a less complete market.

  4. Psychosis, agnosia, and confabulation: an alternative two-factor account.

    Science.gov (United States)

    Turner, Mark A

    2014-01-01

    Theories of delusions which rely on a combination of abnormal experience and defective belief evaluation and/ or cognitive bias are the subject of an emerging consensus. This paper challenges the validity of these theories and constructs a two factor alternative. The paper starts by identifying the difficulty the current theories have explaining the complex delusions of schizophrenia and then, by considering, first, the aetiology of somatopsychotic symptoms, and second, the literature on the relationship between confabulation and allopsychotic symptoms, demonstrates that the natural solution is to retain the experiential factor whilst replacing the second factor with confabulation. The paper is then able to demonstrate that the resultant two-factory theory can clarify recent work on the aetiological role of autonoetic agnosia and on the relationships between confabulation, delusion, and thought disorder. The theory supersedes currently available theories in terms of its simplicity, fruitfulness, scope and conservatism and represents an advance in the search for unified theory of psychosis.

  5. IronMaking Process Alternatives Screening Study

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2000-10-01

    This study by Lockwood Greene evaluates a number ironmaking processes. The appendices provide greater detail and further exploration of the ironmaking processes, including components, relative costs, and comparisons.

  6. Due Process Hearing Case Study

    Science.gov (United States)

    Bateman, David F.

    2009-01-01

    William is 9 years of age, residing with his parent within the boundaries of an unnamed district ("the District"). As a student with autism he is eligible for special education programming and services. There was one issue presented for this due process hearing: What was the appropriate program and placement for him for the 2008-2009 school year?…

  7. Kinetic study of oxychlorination process

    OpenAIRE

    Abdollahi, Reza

    2012-01-01

    Doped CuCl2/Alumina is the catalyst for ethylene dichloride (C2H4CL2) production. Ethylene dichloride is the intermediate for generating polyvinyl chloride (PVC) and is produced as result of catalytic oxy-chlorination of ethylene (C2H4). The process of ethylene oxy-chlorination can be split to three steps on gamma-alumina support. The first step is reduction of cupric chloride which is actually ethylene chlorination step where the second and third steps are re-oxidation and Chlorination of cu...

  8. The two-factor model of evaluating mining rights of coal resources based on options

    Institute of Scientific and Technical Information of China (English)

    ZHANG Jin-suo; ZOU Shao-hui; SHI Xin-min

    2008-01-01

    MRCR could be regarded as a multi-stage compounding real option, based on option theory, assuming the convenience yield of coal reserves to be constant, built a one-factor model of valuating MRCR with the stochastic value of coal reserves. On the basis of our one-factor model, set up a two-factor model of evaluating MRCR assuming the convenience yield follows the mean-reverting process. When applied to valuate the MRCR of a coalmine, this model gives higher values than the one-factor model and the NPV. This is because the increase of convenience yield can improve the executive opportunity of MRCR.

  9. The functions of nonsuicidal self-injury: converging evidence for a two-factor structure.

    Science.gov (United States)

    Klonsky, E David; Glenn, Catherine R; Styer, Denise M; Olino, Thomas M; Washburn, Jason J

    2015-01-01

    Research has identified more than a dozen functions of non-suicidal self-injury (NSI), but the conceptual and empirical overlap among these functions remains unclear. The present study examined the structure of NSI functions in two large samples of patients receiving acute-care treatment for NSI. Two different measures of NSI functions were utilized to maximize generalizability of findings: one sample (n = 946) was administered the Inventory of Statements About Self-injury (ISAS; Klonsky and Glenn in J Psychopathol Behav Assess 31:215-219, 2009), and a second sample (n = 211) was administered the Functional Assessment of Self-Mutilation (FASM; Lloyd et al. in Self-mutilation in a community sample of adolescents: descriptive characteristics and provisional prevalence rates. Poster session at the annual meeting of the Society for Behavioral Medicine, New Orleans, LA, 1997). Exploratory factor analyses revealed that both measures exhibited a robust two-factor structure: one factor represented Intrapersonal functions, such as affect regulation and anti-dissociation, and a second factor represented Social functions, such as interpersonal influence and peer bonding. In support of the two-factor structure's construct validity, the factors exhibited a pattern of correlations with indicators of NSI severity that was consistent with past research and theory. Findings have important implications for theory, research, and treatment. In particular, the two-factor framework should guide clinical assessment, as well as future research on the implications of NSI functions for course, prognosis, treatment, and suicide risk.

  10. Enhanced Two-Factor Authentication and Key Agreement Using Dynamic Identities in Wireless Sensor Networks

    Directory of Open Access Journals (Sweden)

    I-Pin Chang

    2015-11-01

    Full Text Available Key agreements that use only password authentication are convenient in communication networks, but these key agreement schemes often fail to resist possible attacks, and therefore provide poor security compared with some other authentication schemes. To increase security, many authentication and key agreement schemes use smartcard authentication in addition to passwords. Thus, two-factor authentication and key agreement schemes using smartcards and passwords are widely adopted in many applications. Vaidya et al. recently presented a two-factor authentication and key agreement scheme for wireless sensor networks (WSNs. Kim et al. observed that the Vaidya et al. scheme fails to resist gateway node bypassing and user impersonation attacks, and then proposed an improved scheme for WSNs. This study analyzes the weaknesses of the two-factor authentication and key agreement scheme of Kim et al., which include vulnerability to impersonation attacks, lost smartcard attacks and man-in-the-middle attacks, violation of session key security, and failure to protect user privacy. An efficient and secure authentication and key agreement scheme for WSNs based on the scheme of Kim et al. is then proposed. The proposed scheme not only solves the weaknesses of previous approaches, but also increases security requirements while maintaining low computational cost.

  11. Study On Machining Processing Technology Risk Control

    Institute of Scientific and Technical Information of China (English)

    Li Xiqing

    2015-01-01

    In the industrial production process,only to ful y guarantee the machining production safety, it can been ensured that the smooth completion of machining process.Under this back ground,in the machining production process,the machinery processing safety would been ful y concerned,several factors, which may lead to the problem of mechanical processing and production process,were analyzed,and the relevant control strategies were researched.In view of this situation,this paper wil specifical y combined with the machining process characteristics to study the machining process manufacturability risk control.

  12. University Teachers' Job Dissatisfaction: Application of Two-Factor Theory--A Case of Pakistani Education System

    Science.gov (United States)

    Mir, Imran Anwar

    2012-01-01

    This qualitative case study presents the reasons of teachers' job dissatisfaction in the government educational institutes in Pakistan. This case study is based on the two factor theory of Herzberg. The results of this case study reveal four core factors that cause job dissatisfaction among teachers in the public sector universities in developing…

  13. University Teachers' Job Dissatisfaction: Application of Two-Factor Theory--A Case of Pakistani Education System

    Science.gov (United States)

    Mir, Imran Anwar

    2012-01-01

    This qualitative case study presents the reasons of teachers' job dissatisfaction in the government educational institutes in Pakistan. This case study is based on the two factor theory of Herzberg. The results of this case study reveal four core factors that cause job dissatisfaction among teachers in the public sector universities in developing…

  14. Rosenberg's Self-Esteem Scale: Two Factors or Method Effects.

    Science.gov (United States)

    Tomas, Jose M.; Oliver, Amparo

    1999-01-01

    Results of a study with 640 Spanish high school students suggest the existence of a global self-esteem factor underlying responses to Rosenberg's (M. Rosenberg, 1965) Self-Esteem Scale, although the inclusion of method effects is needed to achieve a good model fit. Method effects are associated with item wording. (SLD)

  15. Registered nurse retention strategies in nursing homes: a two-factor perspective.

    Science.gov (United States)

    Hunt, Selina R; Probst, Janice C; Haddock, Kathlyn S; Moran, Robert; Baker, Samuel L; Anderson, Ruth A; Corazzini, Kirsten

    2012-01-01

    As the American population ages and the proportion of individuals over the age of 65 expands, the demand for high-quality nursing home care will increase. However, nursing workforce instability threatens care quality and sustainability in this sector. Despite increasing attention to nursing home staff turnover, far less is known about registered nurse (RN) retention. In this study, the relationships between retention strategies, employee benefits, features of the practice environment, and RN retention were explored. Further, the utility of Herzberg's two-factor theory of motivation as a framework for nursing home retention studies was evaluated. This study was a secondary analysis of the nationally representative 2004 National Nursing Home Survey. The final sample of 1,174 participating nursing homes were either certified by Medicare or Medicaid or licensed by state agencies. We used a weighted multinomial logistic regression using an incremental approach to model the relationships. Although most nursing homes offered some combination of retention programs, the majority of strategies did not have a significant association with the level of RN retention reported by facilities. Director of nursing tenure and other extrinsic factors had the strongest association with RN retention in adjusted analyses. To improve RN retention, organizations may benefit greatly from stabilizing nursing home leadership, especially the director of nursing position. Second, managers of facilities with poor retention may consider adding career ladders for advancement, awarding attendance, and improving employee benefits. As a behavioral outcome of motivation and satisfaction, retention was not explained as expected using Herzberg's two-factor theory.

  16. A Two-Factor Model Better Explains Heterogeneity in Negative Symptoms: Evidence from the Positive and Negative Syndrome Scale.

    Science.gov (United States)

    Jang, Seon-Kyeong; Choi, Hye-Im; Park, Soohyun; Jaekal, Eunju; Lee, Ga-Young; Cho, Young Il; Choi, Kee-Hong

    2016-01-01

    Acknowledging separable factors underlying negative symptoms may lead to better understanding and treatment of negative symptoms in individuals with schizophrenia. The current study aimed to test whether the negative symptoms factor (NSF) of the Positive and Negative Syndrome Scale (PANSS) would be better represented by expressive and experiential deficit factors, rather than by a single factor model, using confirmatory factor analysis (CFA). Two hundred and twenty individuals with schizophrenia spectrum disorders completed the PANSS; subsamples additionally completed the Brief Negative Symptom Scale (BNSS) and the Motivation and Pleasure Scale-Self-Report (MAP-SR). CFA results indicated that the two-factor model fit the data better than the one-factor model; however, latent variables were closely correlated. The two-factor model's fit was significantly improved by accounting for correlated residuals between N2 (emotional withdrawal) and N6 (lack of spontaneity and flow of conversation), and between N4 (passive social withdrawal) and G16 (active social avoidance), possibly reflecting common method variance. The two NSF factors exhibited differential patterns of correlation with subdomains of the BNSS and MAP-SR. These results suggest that the PANSS NSF would be better represented by a two-factor model than by a single-factor one, and support the two-factor model's adequate criterion-related validity. Common method variance among several items may be a potential source of measurement error under a two-factor model of the PANSS NSF.

  17. Laser surface processing and model studies

    CERN Document Server

    Yilbas, Bekir Sami

    2013-01-01

    This book introduces model studies associated with laser surface processing such as conduction limited heating, surface re-melting, Marangoni flow and its effects on the temperature field, re-melting of multi-layered surfaces, laser shock processing, and practical applications. The book provides insight into the physical processes involved with laser surface heating and phase change in laser irradiated region. It is written for engineers and researchers working on laser surface engineering.

  18. Some results on 4~m2~n designs with clear two-factor interaction components

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Clear effects criterion is one of the important rules for selecting optimal fractional factorial designs,and it has become an active research issue in recent years.Tang et al.derived upper and lower bounds on the maximum number of clear two-factor interactions(2fi’s) in 2n-(n-k) fractional factorial designs of resolutions III and IV by constructing a 2n-(n-k) design for given k,which are only restricted for the symmetrical case.This paper proposes and studies the clear effects problem for the asymmetrical case.It improves the construction method of Tang et al.for 2n-(n-k) designs with resolution III and derives the upper and lower bounds on the maximum number of clear two-factor interaction components(2fic’s) in 4m2n designs with resolutions III and IV.The lower bounds are achieved by constructing specific designs.Comparisons show that the number of clear 2fic’s in the resulting design attains its maximum number in many cases,which reveals that the construction methods are satisfactory when they are used to construct 4m2n designs under the clear effects criterion.

  19. Some results on 4m2n designs with clear two-factor interaction components

    Institute of Scientific and Technical Information of China (English)

    ZHAO ShengLi; ZHANG RunChu; LIU MinQian

    2008-01-01

    Clear effects criterion is one of the important rules for selecting optimal fractional factorial designs, and it has become an active research issue in recent years.Tang et al. derived upper and lower bounds on the maximum number of clear two-factor interactions (2fi's) in 2n-(n-k)fractional factorial designs of resolutions Ⅲ and Ⅳ by constructing a 2n-(n-k) design for given k, which are only restricted for the symmetrical case. This paper proposes and studies the clear effects problem for the asymmetrical case. It improves the construction method of Tang et al. for 2n-(n-k)designs with resolution Ⅲ and derives the upper and lower bounds on the maximum number of clear two-factor interaction components(2fic's) in 4m2n designs with resolutions Ⅲ and Ⅳ. The lower bounds are achieved by constructing specific designs. Comparisons show that the number of clear 2fic's in the resulting design attains its maximum number in many cases, which reveals that the construction methods are satisfactory when they are used to construct 4m2n designs under the clear effects criterion.

  20. Study on Professional Process of Bra Design

    Institute of Scientific and Technical Information of China (English)

    李明菊; 徐朝晖

    2001-01-01

    The process of bra design in the underwear industry is studied. Several important aspects of the process were identified: sizing, fabric selection, pattern development and grading, the use of CAD system, fitting and wear trials. Although the design process relies heavily on the expertise and experience of designers, the modern technology such as CAD can facilitate and optimize the design process, and the fitting process on life models is essential for the underwear design. The differences between domestic underwear companies and foreign major ones mainly lie at the lack of dress form specially used for underwear design, lack of CAD/CAM or not making full use of them, and most of all, lack of the professional bra designers or even skillful pattern designers. The prospects and future model of bra design process were also elaborated in this paper.

  1. ERPs studies of cognitive processing during sleep.

    Science.gov (United States)

    Ibáñez, Agustín M; Martín, René San; Hurtado, Esteban; López, Vladimir

    2009-08-01

    In the last few decades, several works on cognitive processing during sleep have emerged. The study of cognitive processing with event related potentials (ERPs) during sleep is a topic of great interest, since ERPs allow the study of stimulation with passive paradigms (without conscious response or behavioural response), opening multiple research possibilities during different sleep phases. We review ERPs modulated by cognitive processes during sleep: N1, Mismatch Negativity (MMN), P2, P3, N400-like, N300-N550, among others. The review shows that there are different cognitive discriminations during sleep related to the frequency, intensity, duration, saliency, novelty, proportion of appearance, meaning, and even sentential integration of stimuli. The fascinating results of cognitive processing during sleep imply serious challenges for cognitive models. The studies of ERPs, together with techniques of neuroimaging, have demonstrated the existence of cognitive processing during sleep. A fundamental question to be considered is if these cognitive phenomena are similar to processing that occurs during wakefulness. Based on this question we discussed the existence of possible mechanisms associated with sleep, as well as the specific cognitive and neurophysiologic differences of wakefulness and sleep. Much knowledge is still required to even understand the conjunction of dramatic changes in cerebral dynamics and the occurrence of cognitive processes. We propose some insights based on ERPs research for further construction of theoretical models for integrating both cognitive processing and specific brain sleep dynamics.

  2. Robustness studies on coal gasification process variables

    Directory of Open Access Journals (Sweden)

    RLJ Coetzer

    2004-12-01

    Full Text Available Optimisation of the Sasol-Lurgi gasification process was carried out by utilising the method of Factorial Experimental Design on the process variables of interest from a specifically equipped full-scale test gasifier. The process variables that govern gasification are not always fully controllable during normal operation. This paper discusses the application of statistical robustness studies as a method for determining the most efficient combination of process variables that might be hard-to-control during normal operation. Response surface models were developed in the process variables for each of the performance variables. It will be shown how statistical robustness studies provided the optimal conditions for sustainable gasifier operability and throughput. In particular, the optimum operability region is significantly expanded towards higher oxygen loads by changing and controlling the particle size distribution of the coal.

  3. THERMODYNAMIC STUDY OF CHROMITE CAUSTICFUSION PROCESS

    Institute of Scientific and Technical Information of China (English)

    S.L. Zheng; Y. Zhang

    2001-01-01

    A new method for chromate cleaning production named chromite caustic fusion pro-cess, is advanced by Institute of Chemical Metallurgy, the Chinese Academy of Sci-ences. With sodium hydroxide as reaction medium, the new process is composed ofthree procedures: liquid phase oxidation of chromite - metastable phase separation -carbonation ammonium transition. Generally illustrating the new process and its fea-tures, this paper mainly studies the thermodynamics of chromite oxidation. The newprocess has much better practical results than the conventional chromate productionprocess in which sodium carbonate is used as reaction medium. The superiority is alsoshown through thermodynamic studies.``

  4. Two-factor authentication system based on optical interference and one-way hash function

    Science.gov (United States)

    He, Wenqi; Peng, Xiang; Meng, Xiangfeng; Liu, Xiaoli

    2012-10-01

    We present a two-factor authentication method to verify the personal identification who tries to access an optoelectronic system. This method is based on the optical interference principle and the traditional one-way Hash function (e.g. MD5). The authentication process is straightforward, the phase key and the password-controlled phase lock of one user are loading on two Spatial Light Modulators (SLMs) in advance, by which two coherent beams are modulated and then interference with each other at the output plane leading to an output image. By comparing the output image with all the standard certification images in the database, the system can thus verify the user's identity. However, the system designing process involves an iterative Modified Phase Retrieval Algorithm (MPRA). For an uthorized user, a phase lock is first created based on a "Digital Fingerprint (DF)", which is the result of a Hash function on a preselected user password. The corresponding phase key can then be determined by use of the phase lock and a designated standard certification image. Note that the encode/design process can only be realized by digital means while the authentication process could be achieved digitally or optically. Computer simulations were also given to validate the proposed approach.

  5. Femtosecond laser studies of ultrafast intramolecular processes

    Energy Technology Data Exchange (ETDEWEB)

    Hayden, C. [Sandia National Laboratories, Livermore, CA (United States)

    1993-12-01

    The goal of this research is to better understand the detailed mechanisms of chemical reactions by observing, directly in time, the dynamics of fundamental chemical processes. In this work femtosecond laser pulses are used to initiate chemical processes and follow the progress of these processes in time. The authors are currently studying ultrafast internal conversion and subsequent intramolecular relaxation in unsaturated hydrocarbons. In addition, the authors are developing nonlinear optical techniques to prepare and monitor the time evolution of specific vibrational motions in ground electronic state molecules.

  6. Surface studies of plasma processed Nb samples

    Energy Technology Data Exchange (ETDEWEB)

    Tyagi, Puneet V. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Doleans, Marc [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Hannah, Brian S. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Afanador, Ralph [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Stewart, Stephen [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Mammosser, John [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Howell, Matthew P [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Saunders, Jeffrey W [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Degraff, Brian D [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Kim, Sang-Ho [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

    2015-01-01

    Contaminants present at top surface of superconducting radio frequency (SRF) cavities can act as field emitters and restrict the cavity accelerating gradient. A room temperature in-situ plasma processing technology for SRF cavities aiming to clean hydrocarbons from inner surface of cavities has been recently developed at the Spallation Neutron Source (SNS). Surface studies of the plasma-processed Nb samples by Secondary ion mass spectrometry (SIMS) and Scanning Kelvin Probe (SKP) showed that the NeO2 plasma processing is very effective to remove carbonaceous contaminants from top surface and improves the surface work function by 0.5 to 1.0 eV.

  7. Elongated Styloid Process - A Radiographic Study

    Directory of Open Access Journals (Sweden)

    Vajendra Joshi

    2007-01-01

    Full Text Available Eagle′s syndrome, also known as elongated styloid process syndrome, is a condition that may be the source of craniofacial and cervical pain. The styloid process is a slender bony projection arising from the lower surface of the petrous portion of the temporal bone. It has been estimated that between 2% to 28% of the general adult population has radiographic evidence of elongated styloid process. In adults, the mean radiographic length of the styloid process is 20 to 30 mm and its tip is located between the external and internal carotid arteries, just lateral to the tonsillar fossa. This study was done to evaluate the elongation of the styloid process and/or ligament ossification by using panoramic radiographs. Both ossification of stylohyoid and stylomandibular ligaments and truly elongated styloid process were defined as elongated styloid process. Elongated styloid processes should be kept in mind when the clinician is faced with oropharyngeal/ maxillary pain originating from impacted or unerupted third molars or dental caries.

  8. Theoretical aspects of studying the migration processes

    Directory of Open Access Journals (Sweden)

    Dilfuza Rasulova

    2010-02-01

    Full Text Available In conditions of continuous growth of population in Uzbekistan the issue of managing the labor migration processes is becoming more important. Effective coordination of migration processes requires comprehensive study of theory and methodology of labour migration, particularly considering cases of transition countries. The paper considers some theoretic concepts that seem important for understanding the mechanism of migration princesses, suggests practical recommendations for the associated decision-making.

  9. A discrete-time two-factor model for pricing bonds and interest rate derivatives under random volatility

    OpenAIRE

    Heston, Steven L.; Nandi, Saikat

    1999-01-01

    This paper develops a discrete-time two-factor model of interest rates with analytical solutions for bonds and many interest rate derivatives when the volatility of the short rate follows a GARCH process that can be correlated with the level of the short rate itself. Besides bond and bond futures, the model yields analytical solutions for prices of European options on discount bonds (and futures) as well as other interest rate derivatives such as caps, floors, average rate options, yield curv...

  10. Using vignettes to study family consumption processes

    DEFF Research Database (Denmark)

    Grønhøj, Alice; Bech-Larsen, Tino

    2010-01-01

    . Following an overview of methodological and practical problems of studying consumption interaction processes in families, a discussion of how vignettes may be used to enhance knowledge of family decision-making processes in real-life contexts is presented. Design implications are discussed and strategies......The use of vignettes for qualitative consumer research is discussed in this article. More specifically, vignettes are proposed as a useful research technique for conducting systematic and rigorous studies of consumer interaction processes, in particular as these relate to family consumption issues...... for applying the vignette method are outlined and illustrated by two recent studies of proenvironmental consumer behavior in a family context. The paper concludes with a discussion of the benefits and the possible pitfalls of using vignettes....

  11. A simulation study on garment manufacturing process

    Science.gov (United States)

    Liong, Choong-Yeun; Rahim, Nur Azreen Abdul

    2015-02-01

    Garment industry is an important industry and continues to evolve in order to meet the consumers' high demands. Therefore, elements of innovation and improvement are important. In this work, research studies were conducted at a local company in order to model the sewing process of clothes manufacturing by using simulation modeling. Clothes manufacturing at the company involves 14 main processes, which are connecting the pattern, center sewing and side neating, pockets sewing, backside-sewing, attaching the front and back, sleeves preparation, attaching the sleeves and over lock, collar preparation, collar sewing, bottomedge sewing, buttonholing sewing, removing excess thread, marking button, and button cross sewing. Those fourteen processes are operated by six tailors only. The last four sets of processes are done by a single tailor. Data collection was conducted by on site observation and the probability distribution of processing time for each of the processes is determined by using @Risk's Bestfit. Then a simulation model is developed using Arena Software based on the data collected. Animated simulation model is developed in order to facilitate understanding and verifying that the model represents the actual system. With such model, what if analysis and different scenarios of operations can be experimented with virtually. The animation and improvement models will be presented in further work.

  12. Using vignettes to study family consumption processes

    DEFF Research Database (Denmark)

    Grønhøj, Alice; Bech-Larsen, Tino

    2010-01-01

    The use of vignettes for qualitative consumer research is discussed in this article. More specifically, vignettes are proposed as a useful research technique for conducting systematic and rigorous studies of consumer interaction processes, in particular as these relate to family consumption issues...... for applying the vignette method are outlined and illustrated by two recent studies of proenvironmental consumer behavior in a family context. The paper concludes with a discussion of the benefits and the possible pitfalls of using vignettes....

  13. Ironmaking Process Alternative Screening Study, Volume 1

    Energy Technology Data Exchange (ETDEWEB)

    Lockwood Greene, . .

    2005-01-06

    Iron in the United States is largely produced from iron ore mined in the United States or imported from Canada or South America. The iron ore is typically smelted in Blast Furnaces that use primarily iron ore, iron concentrate pellets metallurgical coke, limestone and lime as the raw materials. Under current operating scenarios, the iron produced from these Blast Furnaces is relatively inexpensive as compared to current alternative iron sources, e.g. direct iron reduction, imported pig iron, etc. The primary problem the Blast Furnace Ironmaking approach is that many of these Blast furnaces are relatively small, as compared to the newer, larger Blast Furnaces; thus are relatively costly and inefficient to operate. An additional problem is also that supplies of high-grade metallurgical grade coke are becoming increasingly in short supply and costs are also increasing. In part this is due to the short supply and costs of high-grade metallurgical coals, but also this is due to the increasing necessity for environmental controls for coke production. After year 2003 new regulations for coke product environmental requirement will likely be promulgated. It is likely that this also will either increase the cost of high-quality coke production or will reduce the available domestic U.S. supply. Therefore, iron production in the United States utilizing the current, predominant Blast Furnace process will be more costly and would likely be curtailed due to a coke shortage. Therefore, there is a significant need to develop or extend the economic viability of Alternate Ironmaking Processes to at least partially replace current and declining blast furnace iron sources and to provide incentives for new capacity expansion. The primary conclusions of this comparative Study of Alternative Ironmaking Process scenarios are: (1) The processes with the best combined economics (CAPEX and OPEX impacts in the I.R.R. calculation) can be grouped into those Fine Ore based processes with no scrap

  14. Plasma chemistry study of PLAD processes

    Energy Technology Data Exchange (ETDEWEB)

    Qin Shu; Brumfield, Kyle; Liu, Lequn Jennifer; Hu, Yongjun Jeff; McTeer, Allen; Hsu, Wei Hui; Wang Maoying [Nanya Technology Inc., Santa Clara, CA 95054 (United States); Micron Technology Inc., Boise, ID 83707 (United States)

    2012-11-06

    Plasma doping (PLAD) shows very different impurity profiles compared to the conventional beam-line-based ion implantations due to its non-mass separation property and plasma environment. There is no simulation for PLAD process so far due to a lack of a dopant profile model. Several factors determine impurity profiles of PLAD process. The most significant factors are: plasma chemistry and deposition/etching characteristics of multi-ion species plasmas. In this paper, we present plasma chemistry and deposition/etching characteristics of PLAD processes versus co-gas dilutions. Four dopant plasmas including B{sub 2}H{sub 6}, BF{sub 3}, AsH{sub 3}, and PH{sub 3}, and two non-dopant plasmas including CH{sub 4} and GeH{sub 4} are studied and demonstrated.

  15. Fuel quality processing study, volume 1

    Science.gov (United States)

    Ohara, J. B.; Bela, A.; Jentz, N. E.; Syverson, H. T.; Klumpe, H. W.; Kessler, R. E.; Kotzot, H. T.; Loran, B. L.

    1981-01-01

    A fuel quality processing study to provide a data base for an intelligent tradeoff between advanced turbine technology and liquid fuel quality, and also, to guide the development of specifications of future synthetic fuels anticipated for use in the time period 1985 to 2000 is given. Four technical performance tests are discussed: on-site pretreating, existing refineries to upgrade fuels, new refineries to upgrade fuels, and data evaluation. The base case refinery is a modern Midwest refinery processing 200,000 BPD of a 60/40 domestic/import petroleum crude mix. The synthetic crudes used for upgrading to marketable products and turbine fuel are shale oil and coal liquids. Of these syncrudes, 50,000 BPD are processed in the existing petroleum refinery, requiring additional process units and reducing petroleum feed, and in a new refinery designed for processing each syncrude to produce gasoline, distillate fuels, resid fuels, and turbine fuel, JPGs and coke. An extensive collection of synfuel properties and upgrading data was prepared for the application of a linear program model to investigate the most economical production slate meeting petroleum product specifications and turbine fuels of various quality grades. Technical and economic projections were developed for 36 scenarios, based on 4 different crude feeds to either modified existing or new refineries operated in 2 different modes to produce 7 differing grades of turbine fuels. A required product selling price of turbine fuel for each processing route was calculated. Procedures and projected economics were developed for on-site treatment of turbine fuel to meet limitations of impurities and emission of pollutants.

  16. Herzberg’s Two Factor Theory of Work Motivation: The Case of Tourism Employees

    OpenAIRE

    Daša Fabjan; Nina Lovec; Žana Čivre

    2013-01-01

    The article focuses on work motivation of Slovenian front-line employees working in tourism. The motivation is analyzed using a Herzberg’s Two Factor Theory of work motivation, which is based on two factor groups of work motivation – growth factors that motivate, and hygiene factors that do not motivate, yet their absence causes work dissatisfaction. The empirical research results indicated that growth factors (e.g. recognition and responsibility) have a major impact on work motivation, while...

  17. AX Tank farm process impacts study

    Energy Technology Data Exchange (ETDEWEB)

    SKELLY, W.A.

    1999-03-18

    This study provides facility and process concepts and costs for partial decontamination of the most heavily contaminated debris from the demolition of the four AX tanks and ancillary equipment items. This debris would likely be classified as high-level and/or remote handle TRU waste based on source and radiological inventory. A process flow sheet was developed to treat contaminated metal wastes such as pipes and tank liners as well as contaminated concrete and the residual waste and grout left in the tanks after final waste retrieval. The treated solid waste is prepared for delivery to either the ERDF or the Low-Level waste burial grounds. Liquid waste products are delivered to the private vitrification contractor for further treatment and storage. This is one of several reports prepared for use by the Hanford Tanks Initiative Project to develop retrieval performance criteria for tank farms.

  18. Fundamental studies on cavitation melt processing

    Science.gov (United States)

    Tzanakis, I.; Hodnett, M.; Lebon, G. S. B.; Eskin, D. G.; Pericleous, K.

    2016-05-01

    The application of ultrasound to industrial casting processes has attracted research interest during the last 50 years. However, the transfer and scale-up of this advanced and promising technology to industry has been hindered by difficulties in treating large volumes of liquid metal due to the lack of understanding of certain fundamentals. In the current study experimental results on ultrasonic processing in deionised water and in liquid aluminium (Al) are reported. Cavitation activity was determined in both liquid environments and acoustic pressures were successfully measured using an advanced high-temperature cavitometer sensor. Results showed that highest cavitation intensity in the liquid bulk is achieved at lower amplitudes of the sonotrode tip than the maximum available, suggesting nonlinearity in energy transfer to the liquid, while the location of the sonotrode is seen to substantially affect cavitation activity within the liquid. Estimation of real-time acoustic pressures distributed inside a crucible with liquid Al was performed for the first time.

  19. Study of supracondylar process of humerus

    Directory of Open Access Journals (Sweden)

    Ravi Vandana

    2014-01-01

    Full Text Available The supra condylar process is occasional beak like projection from anteromedial surface of distal 1/3 rd of humerus. It appears to be phylogenetic remnant of complete osseous bridge found in reptiles, marsupials, cats, lemurs and new world monkeys. Among 133 dried humeri studied only one right humerus showed SCP (incidence 0.75% whose dimensions were recorded and photographed. SCP is usually clinically silent but can be the cause for median or ulnar nerve and brachial artery compression syndrome especially when associated with Struthers ligament. Therefore the knowledge of presence of SCP is important for clinicians and radiologists along with anatomists and anthropologists.

  20. Facilities for pyrochemical process studies at ENEA

    Energy Technology Data Exchange (ETDEWEB)

    De Angelis, G.; Fedeli, C.; Tiranti, G. [Italian National Agency for New Technology, Energy and the Environment - ENEA, Casaccia Research Center, Via Anguillarese 301, 00123 S. Maria di Galeria, Roma (Italy); Baicchi, E. [ENEA, Brasimone Research Center, 40032 Camugnano, Bologna (Italy)

    2013-07-01

    Some facilities have successfully been installed at ENEA laboratories for pyrochemical process studies under inactive conditions. PYREL III, MECRYP and OGATA plants allow to perform experiments about electrorefining and electroreduction of simulated fuel, melt crystallization of lithium chloride containing impurities from electroreduction campaigns, and trapping of volatile and semi-volatile fission products. Moreover, an argon-atmosphere glove-box is used for conditioning of chloride salt wastes with sodalite or SAP (SiO{sub 2}-Al{sub 2}O{sub 3}-P{sub 2}O{sub 5}) matrix.

  1. Digital signal processing for radioactive decay studies

    Energy Technology Data Exchange (ETDEWEB)

    Miller, D.; Madurga, M.; Paulauskas, S. V. [Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 (United States); Ackermann, D.; Heinz, S.; Hessberger, F. P.; Hofmann, S. [GSI Helmholtzzentrum fuer Schwerionenforschung, D-64220, Darmstadt (Germany); Grzywacz, R. [Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 (United States); Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Miernik, K.; Rykaczewski, K. [Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Tan, H. [XIA LLC, Hayward, CA 94544 (United States)

    2011-11-30

    The use of digital acquisition system has been instrumental in the investigation of proton and alpha emitting nuclei. Recent developments extend the sensitivity and breadth of the application. The digital signal processing capabilities, used predominately by UT/ORNL for decay studies, include digitizers with decreased dead time, increased sampling rates, and new innovative firmware. Digital techniques and these improvements are furthermore applicable to a range of detector systems. Improvements in experimental sensitivity for alpha and beta-delayed neutron emitters measurements as well as the next generation of superheavy experiments are discussed.

  2. Hydrodynamic Study Of Column Bioleaching Processes

    Directory of Open Access Journals (Sweden)

    Sadowski Zygmunt

    2015-06-01

    Full Text Available The modelling of flow leaching solution through the porous media has been considered. The heap bioleaching process can be tested using the column experimental equipment. This equipment was employed to the hydrodynamic studies of copper ore bioleaching. The copper ore (black shale ore with the support, inertial materials (glass small balls and polyethylene beads was used to the bioleaching tests. The packed beds were various composition, the ore/support ratio was changed. The correlation between the bed porosity and bioleaching kinetics, and copper recovery was investigated.

  3. Avio case study: the MRO process

    Science.gov (United States)

    Corallo, Angelo; Dimartino, Angelo; Errico, Fabrizio; Giangreco, Enza

    This chapter presents the case study of the Avio Brindisi plant where a profound process of change has been in progress for a number of years. We use the TEKNE Project methodology of change to analyze the different aspects of the case, highlighting the firm's strategic, organizational and technological characteristics and the environment it operates in. In particular, we envisage a change in the plant's business model in response to the expansion of its client segments and a potential new approach to MRO operations based on advanced fleet management practices that would radically change the firm's organization and value network with respect to its MRO service offering, thereby yielding extensive global market opportunities.

  4. Creativity and the homospatial process. Experimental studies.

    Science.gov (United States)

    Rothenberg, A

    1988-09-01

    Through empirical studies involving intensive and extensive interviewing of outstanding creative persons in literature, visual art, and science, a specific creative cognitive operation involving complex mental imagery was identified. This operation has been designated the "homospatial process" and defined as actively conceiving two or more discrete entities occupying the same space, a conception leading to the articulation of new identities. Four experimental assessments involving exposure to stimuli designed to evoke the homospatial process have been carried out with groups of talented persons as follows: (1) 43 writers produced short poetic metaphors in response to 10 different pairs of slide stimuli. Subjects were randomly assigned to view the pairs either superimposed upon one another, and thereby appearing to occupy the same spatial location, or separated and side by side on the screen as a control condition. (2) 46 writers were similarly divided and exposed for a shortened period of time to the same stimuli in order to encourage mental elaboration in the creation of poetic metaphors. (3) Drawings were created by 43 artists separated into a group exposed to three superimposed images and a control group exposed to the same component images side by side. (4) 39 artists were separated into a group exposed to three superimposed images and a control group exposed to the same images constructed into a single-image figure-ground display. Findings were that, in all four experiments, subjects' productions in response to the superimposed visual stimuli were rated significantly higher in creativity, by independent experts, than productions in response to the control condition. Therefore, the externalized representations of the homospatial process facilitated both literary and artistic creativity.

  5. Validation of the French version of the marijuana craving questionnaire (MCQ) generates a two-factor model.

    Science.gov (United States)

    Chauchard, Emeline; Goutaudier, Nelly; Heishman, Stephen J; Gorelick, David A; Chabrol, Henri

    2015-01-01

    Craving is a major issue in drug addiction, and a target for drug treatment. The Marijuana Craving Questionnaire-Short Form (MCQ-SF) is a useful tool for assessing cannabis craving in clinical and research settings. To validate the French version of the MCQ-SF (FMCQ-SF). Young adult cannabis users not seeking treatment (n = 679) completed the FMCQ-SF and questionnaires assessing their frequency of cannabis use and craving, cannabis use disorder criteria, and alcohol use. Confirmatory factor analysis of the four-factor FMCQ-SF model did not fit the data well. Exploratory factor analysis suggested a two-factor solution ("pleasure", characterized by planning and expectation of positive effects, and "release of tension", characterized by relief from anxiety, nervousness, or tension) with good psychometric properties. This two-factor model showed good internal and convergent validity and correlated with cannabis abuse and dependence and with frequency of cannabis use and craving. Validation of the FMCQ-SF generated a two-factor model, different from the four-factor solution generated in English language studies. Considering that craving plays an important role in withdrawal and relapse, this questionnaire should be useful for French-language addiction professionals.

  6. Assessing Cognitive and Affective Empathy Through the Interpersonal Reactivity Index: An Argument Against a Two-Factor Model.

    Science.gov (United States)

    Chrysikou, Evangelia G; Thompson, W Jake

    2016-12-01

    One aspect of higher order social cognition is empathy, a psychological construct comprising a cognitive (recognizing emotions) and an affective (responding to emotions) component. The complex nature of empathy complicates the accurate measurement of these components. The most widely used measure of empathy is the Interpersonal Reactivity Index (IRI). However, the factor structure of the IRI as it is predominantly used in the psychological literature differs from Davis's original four-factor model in that it arbitrarily combines the subscales to form two factors: cognitive and affective empathy. This two-factor model of the IRI, although popular, has yet to be examined for psychometric support. In the current study, we examine, for the first time, the validity of this alternative model. A confirmatory factor analysis showed poor model fit for this two-factor structure. Additional analyses offered support for the original four-factor model, as well as a hierarchical model for the scale. In line with previous findings, females scored higher on the IRI than males. Our findings indicate that the IRI, as it is currently used in the literature, does not accurately measure cognitive and affective empathy and highlight the advantages of using the original four-factor structure of the scale for empathy assessments. © The Author(s) 2015.

  7. Study of The Final Customer Loyalty Process

    Directory of Open Access Journals (Sweden)

    Juan Carlos Fandos

    2013-12-01

    Full Text Available For any business is important to maintain a loyal customer base to help they to survive over time. This situation is accentuated even to the extent that increases competition and increases uncertainty. At present these are two features that are really developed. Because of the deep crisis in which we are, and other elements such as globalization and the development of new technologies and communication systems, we are faced with a scenario of intense competition and uncertainty manifest. It is therefore more necessary than ever to know in depth how to get customers to be faithful, and develop true loyalty strategies.In this paper, we present the sequential approach to the formation of consumer loyalty in order to deepen understanding of the concept. It is supplemented by studying the combined effect of switching costs as an element that promotes the continuity of the relationship. The results shows that the consumer takes a more cognitive process information in their initial assessments of the service and therefore in the early stages of loyalty. As advances in consumer behavior process becomes more direct and mechanic, so we can say that the customer-company bond is stronger.

  8. Two-Factor User Authentication with Key Agreement Scheme Based on Elliptic Curve Cryptosystem

    Directory of Open Access Journals (Sweden)

    Juan Qu

    2014-01-01

    Full Text Available A password authentication scheme using smart card is called two-factor authentication scheme. Two-factor authentication scheme is the most accepted and commonly used mechanism that provides the authorized users a secure and efficient method for accessing resources over insecure communication channel. Up to now, various two-factor user authentication schemes have been proposed. However, most of them are vulnerable to smart card loss attack, offline password guessing attack, impersonation attack, and so on. In this paper, we design a password remote user authentication with key agreement scheme using elliptic curve cryptosystem. Security analysis shows that the proposed scheme has high level of security. Moreover, the proposed scheme is more practical and secure in contrast to some related schemes.

  9. Monoclonal Antibodies Production Platforms: An Opportunity Study of a Non-Protein-A Chromatographic Platform Based on Process Economics.

    Science.gov (United States)

    Grilo, António L; Mateus, Marília; Aires-Barros, Maria R; Azevedo, Ana M

    2017-09-13

    Monoclonal antibodies currently dominate the biopharmaceutical market with growing sales having reached 80 billion USD in 2016. As most top-selling mAbs are approaching the end of their patent life, biopharmaceutical companies compete fiercely in the biosimilars market. These two factors present a strong motivation for alternative process strategies and process optimization. In this work a novel purification strategy for monoclonal antibodies comprising phenylboronic acid multimodal chromatography for capture followed by polishing by ion-exchange monolithic chromatography and packed bed hydrophobic interaction chromatography is presented and compared to the traditional protein-A-based process. Although the capital investment is similar for both processes, the operation cost is 20% lower for the novel strategy. This study shows that the new process is worthwhile investing in and could present a viable alternative to the platform process used by most industrial players. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  10. Determinants of Business Student Satisfaction and Retention in Higher Education: Applying Herzberg's Two-Factor Theory

    Science.gov (United States)

    DeShields, Oscar W., Jr.; Kara, Ali; Kaynak, Erdener

    2005-01-01

    Purpose: This paper focuses on the determinants of student satisfaction and retention in a college or university that are assumed to impact students' college experience. Design/methodology/approach: Using empirical data and Herzberg's two-factor theory, a modified version of the questionnaire developed by Keaveney and Young was administered to…

  11. A two-factor, stochastic programming model of Danish mortgage-backed securities

    DEFF Research Database (Denmark)

    Nielsen, Søren S.; Poulsen, Rolf

    2004-01-01

    -trivial, both in terms of deciding on an initial mortgage, and in terms of managing (rebalancing) it optimally.We propose a two-factor, arbitrage-free interest-rate model, calibrated to observable security prices, and implement on top of it a multi-stage, stochastic optimization program with the purpose...

  12. Determinants of Business Student Satisfaction and Retention in Higher Education: Applying Herzberg's Two-Factor Theory

    Science.gov (United States)

    DeShields, Oscar W., Jr.; Kara, Ali; Kaynak, Erdener

    2005-01-01

    Purpose: This paper focuses on the determinants of student satisfaction and retention in a college or university that are assumed to impact students' college experience. Design/methodology/approach: Using empirical data and Herzberg's two-factor theory, a modified version of the questionnaire developed by Keaveney and Young was administered to…

  13. Using Trusted Execution Environments in Two-factor Authentication: comparing approaches

    NARCIS (Netherlands)

    van Rijswijk, Roland M.; Poll, Erik

    Classic two-factor authentication has been around for a long time and has enjoyed success in certain markets (such as the corporate and the banking environ- ment). A reason for this success are the strong security properties, particularly where user interaction is concerned. These properties hinge

  14. A Two-Factor Autoregressive Moving Average Model Based on Fuzzy Fluctuation Logical Relationships

    Directory of Open Access Journals (Sweden)

    Shuang Guan

    2017-10-01

    Full Text Available Many of the existing autoregressive moving average (ARMA forecast models are based on one main factor. In this paper, we proposed a new two-factor first-order ARMA forecast model based on fuzzy fluctuation logical relationships of both a main factor and a secondary factor of a historical training time series. Firstly, we generated a fluctuation time series (FTS for two factors by calculating the difference of each data point with its previous day, then finding the absolute means of the two FTSs. We then constructed a fuzzy fluctuation time series (FFTS according to the defined linguistic sets. The next step was establishing fuzzy fluctuation logical relation groups (FFLRGs for a two-factor first-order autoregressive (AR(1 model and forecasting the training data with the AR(1 model. Then we built FFLRGs for a two-factor first-order autoregressive moving average (ARMA(1,m model. Lastly, we forecasted test data with the ARMA(1,m model. To illustrate the performance of our model, we used real Taiwan Stock Exchange Capitalization Weighted Stock Index (TAIEX and Dow Jones datasets as a secondary factor to forecast TAIEX. The experiment results indicate that the proposed two-factor fluctuation ARMA method outperformed the one-factor method based on real historic data. The secondary factor may have some effects on the main factor and thereby impact the forecasting results. Using fuzzified fluctuations rather than fuzzified real data could avoid the influence of extreme values in historic data, which performs negatively while forecasting. To verify the accuracy and effectiveness of the model, we also employed our method to forecast the Shanghai Stock Exchange Composite Index (SHSECI from 2001 to 2015 and the international gold price from 2000 to 2010.

  15. Studies of dynamical processes affecting global climate

    Energy Technology Data Exchange (ETDEWEB)

    Keller, C.; Cooper, D.; Eichinger, W. [and others

    1998-12-31

    This is the final report of a three-year, Laboratory Directed Research and Development project at the Los Alamos National Laboratory (LANL). The main objective was, by a combined theoretical and observational approach, to develop improved models of dynamic processes in the oceans and atmosphere and to incorporate them into large climate codes, chiefly in four main areas: numerical physics, chemistry, water vapor, and ocean-atmosphere interactions. Main areas of investigation included studies of: cloud parameterizations for global climate codes, Lidar and the planetary boundary layer, chemistry, climate variability using coupled ocean-atmospheric models, and numerical physical methods. This project employed a unique approach that included participation of a number of University of California faculty, postdoctoral fellows and graduate students who collaborated with Los Alamos research staff on specific tasks, thus greatly enhancing the research output. Overall accomplishments during the sensing of the atmospheric planetary were: (1) first two- and three-dimensional remote sensing of the atmospheric planetary boundary layer using Lidars, (2) modeling of 20-year cycle in both pressure and sea surface temperatures in North Pacific, (3) modeling of low frequency internal variability, (4) addition of aerosols to stratosphere to simulate Pinatubo effect on ozone, (5) development of fast, comprehensive chemistry in the troposphere for urban pollution studies, (6) new prognostic cloud parameterization in global atmospheric code remedied problems with North Pacific atmospheric circulation and excessive equatorial precipitation, (7) development of a unique aerosol analysis technique, the aerosol time-of-flight mass spectrometer (ATOFMS), which allows real-time analysis of the size and chemical composition of individual aerosol particles, and (8) numerical physics applying Approximate Inertial Manifolds to ocean circulation. 14 refs., 6 figs.

  16. Information Processing Approaches to Studying Spelling Deficiencies.

    Science.gov (United States)

    Gerber, Michael M.; Hall, Robert J.

    1987-01-01

    The article explores information processing models of spelling performance and argues that an adequate theory of spelling processes must include: (1) qualitative changes in performance as a function of maturation that underlie development of automaticity; (2) transactional development of spelling-related knowledge structures and efficient…

  17. Feed process studies: Research-Scale Melter

    Energy Technology Data Exchange (ETDEWEB)

    Whittington, K.F.; Seiler, D.K.; Luey, J.; Vienna, J.D.; Sliger, W.A.

    1996-09-01

    In support of a two-phase approach to privatizing the processing of hazardous and radioactive waste at Hanford, research-scale melter (RSM) experiments were conducted to determine feed processing characteristics of two potential privatization Phase 1 high-level waste glass formulations and to determine if increased Ag, Te, and noble metal amounts would have bad effects. Effects of feed compositions and process conditions were examined for processing rate, cold cap behavior, off-gas, and glass properties. The 2 glass formulations used were: NOM-2 with adjusted waste loading (all components except silica and soda) of 25 wt%, and NOM-3 (max waste loaded glass) with adjusted waste loading of 30 wt%. The 25 wt% figure is the minimum required in the privatization Request for Proposal. RSM operated for 19 days (5 runs). 1010 kg feed was processed, producing 362 kg glass. Parts of runs 2 and 3 were run at 10 to 30 degrees above the nominal temperature 1150 C, with the most significant processing rate increase in run 3. Processing observations led to the choice of NOM-3 for noble metal testing in runs 4 and 5. During noble metal testing, processing rates fell 50% from baseline. Destructive analysis showed that a layer of noble metals and noble metal oxides settled on the floor of the melter, leading to current ``channeling`` which allowed the top section to cool, reducing production rates.

  18. Study of Image Processing, Enhancement and Restoration

    Directory of Open Access Journals (Sweden)

    Bhausaheb Shivajirao Shinde

    2011-11-01

    Full Text Available Digital image processing is a means by which the valuable information in observed raw image data can be revealed. A web-based image processing pipeline was created under the ambitious educational program Venus Transit 2004 (VT-2004. The active participants in the VT-2004 can apply the basic processing methods to the images obtained by their amateur telescopes and/or they can process an image observed at any observatory involved in the project. The processed result image is displayed immediately on the display. Above that all participants can follow the distance Sun-Venus centers computation performed at the professional observatory in the real time. There is a possibility to submit an image from their own observation into the database. It will be used for the distance Earth-Sun computation.

  19. A study of processes for welding pipelines

    Energy Technology Data Exchange (ETDEWEB)

    Weston, J. (ed.)

    1991-07-01

    A review was made of exisiting and potential processes for welding pipelines: fusion welding (arc, electron beam, laser, thermit) and forge welding (friction, flash, magnetically impelled arc butt, upset butt, explosive, shielded active gas, gas pressure). Consideration of J-lay operations gave indications that were reflections of the status of the processes in terms of normal land and offshore S-lay operation: forge welding processes, although having promise require considerable development; fusion welding processes offer several possibilities (mechanized GMA welding likely to be used in 1991-2); laser welding requires development in all pipeline areas: a production machine for electron beam welding will involve high costs. Nondestructive testing techniques are also reviewed. Demand for faster quality assessment is being addressed by speeding radiographic film processing and through the development of real time radiography and automatic ultrasonic testing. Conclusions on most likely future process developments are: SMAW with cellulosic electrodes is best for tie-ins, short pip runs; SMAW continues to be important for small-diameter lines, although mechanized GMA could be used, along with mechanical joining, MIAB, radial fraction, and flash butt; mechanized GMA welding is likely to predominate for large diameter lines and probably will be used for the first J-lay line (other techniques could be used too); and welding of piping for station facilities involves both shop welding of sub-assemblies and on-site welding of pipe and sub-assemblies to each other (site welding uses both SMAW and GMAW). Figs, tabs.

  20. Plasma characterization studies for materials processing

    Energy Technology Data Exchange (ETDEWEB)

    Pfender, E.; Heberlein, J. [Univ. of Minnesota, Minneapolis, MN (United States)

    1995-12-31

    New applications for plasma processing of materials require a more detailed understanding of the fundamental processes occurring in the processing reactors. We have developed reactors offering specific advantages for materials processing, and we are using modeling and diagnostic techniques for the characterization of these reactors. The emphasis is in part set by the interest shown by industry pursuing specific plasma processing applications. In this paper we report on the modeling of radio frequency plasma reactors for use in materials synthesis, and on the characterization of the high rate diamond deposition process using liquid precursors. In the radio frequency plasma torch model, the influence of specific design changes such as the location of the excitation coil on the enthalpy flow distribution is investigated for oxygen and air as plasma gases. The diamond deposition with liquid precursors has identified the efficient mass transport in form of liquid droplets into the boundary layer as responsible for high growth, and the chemical properties of the liquid for the film morphology.

  1. A STUDY ON THE WRITING PROCESS

    Institute of Scientific and Technical Information of China (English)

    Qiu; Xu

    2007-01-01

    The objective of this paper is to help the students become good writers by guiding them through the process of writing,such as generating ideas, drafting, and revising. The ability to write well will help students provide answers in examinations and write project reports and academic essays which will be understood easily and appreciated by the teachers. Writing well is also an asset at the work place, where you may be writing memos, e-mail messages, reports, or proposals to various types of readers. Therefore, it is crucial for the students to be coached in the use of the writing process. In this paper, we will analyze the complete writing process by dividing it into three stages: planning, writing, and finalizing. Within each of these stages, there are a few steps.

  2. Two-factor theory – at the intersection of health care management and patient satisfaction

    Science.gov (United States)

    Bohm, Josef

    2012-01-01

    Using data obtained from the 2004 Joint Canadian/United States Survey of Health, an analytic model using principles derived from Herzberg’s motivational hygiene theory was developed for evaluating patient satisfaction with health care. The analysis sought to determine whether survey variables associated with consumer satisfaction act as Hertzberg factors and contribute to survey participants’ self-reported levels of health care satisfaction. To validate the technique, data from the survey were analyzed using logistic regression methods and then compared with results obtained from the two-factor model. The findings indicate a high degree of correlation between the two methods. The two-factor analytical methodology offers advantages due to its ability to identify whether a factor assumes a motivational or hygienic role and assesses the influence of a factor within select populations. Its ease of use makes this methodology well suited for assessment of multidimensional variables. PMID:23055755

  3. Two-factor theory - at the intersection of health care management and patient satisfaction.

    Science.gov (United States)

    Bohm, Josef

    2012-01-01

    Using data obtained from the 2004 Joint Canadian/United States Survey of Health, an analytic model using principles derived from Herzberg's motivational hygiene theory was developed for evaluating patient satisfaction with health care. The analysis sought to determine whether survey variables associated with consumer satisfaction act as Hertzberg factors and contribute to survey participants' self-reported levels of health care satisfaction. To validate the technique, data from the survey were analyzed using logistic regression methods and then compared with results obtained from the two-factor model. The findings indicate a high degree of correlation between the two methods. The two-factor analytical methodology offers advantages due to its ability to identify whether a factor assumes a motivational or hygienic role and assesses the influence of a factor within select populations. Its ease of use makes this methodology well suited for assessment of multidimensional variables.

  4. Studies in the theory of random processes

    CERN Document Server

    Skhorokhod, A V

    1982-01-01

    This text is devoted to the development of certain probabilistic methods in the specific field of stochastic differential equations and limit theorems for Markov processes. Specialists, researchers, and students in the field of probability will find it a source of important theorems as well as a remarkable amount of advanced material in compact form.The treatment begins by introducing the basic facts of the theory of random processes and constructing the auxiliary apparatus of stochastic integrals. All proofs are presented in full. Succeeding chapters explore the theory of stochastic different

  5. Two Factor Authentications Using One Time Random Password for Secure Online Transaction

    OpenAIRE

    G. Umamaheswari; Dr.A.Kangaiammal; K.K.Kavitha

    2015-01-01

    The concepts of secure transactions are essential for almost all online transaction. Generally such methodologies were adapted in recent days using one time password. The one time password is a random password generated by the server send to the user for their person authentication access. In contract with the traditional approach the work addresses the concept of two factor authentication for accessing and approving the one time password by the legitimate user. This works on all platforms an...

  6. Two-factor theory – at the intersection of health care management and patient satisfaction

    Directory of Open Access Journals (Sweden)

    Bohm J

    2012-10-01

    Full Text Available Josef BohmHealth Services Administration, New York City College of Technology, City University of New York, Brooklyn, NY, USAAbstract: Using data obtained from the 2004 Joint Canadian/United States Survey of Health, an analytic model using principles derived from Herzberg’s motivational hygiene theory was developed for evaluating patient satisfaction with health care. The analysis sought to determine whether survey variables associated with consumer satisfaction act as Hertzberg factors and contribute to survey participants' self-reported levels of health care satisfaction. To validate the technique, data from the survey were analyzed using logistic regression methods and then compared with results obtained from the two-factor model. The findings indicate a high degree of correlation between the two methods. The two-factor analytical methodology offers advantages due to its ability to identify whether a factor assumes a motivational or hygienic role and assesses the influence of a factor within select populations. Its ease of use makes this methodology well suited for assessment of multidimensional variables.Keywords: two-factor theory, behavioral theory, sociology of health care, patient satisfaction

  7. ECCO Mnemonic Authentication—Two-Factor Authentication Method with Ease-of-Use

    Directory of Open Access Journals (Sweden)

    Saman Gerami Moghaddam

    2014-06-01

    Full Text Available Not very long ago, organizations used to identify their customers by means of one-factor authentication mechanisms. In today's world, however, these mechanisms cannot overcome the new security threats at least when it comes to high risk situations. Hence, identity providers have introduced varieties of two-factor authentication mechanisms. It may be argued that users may experience difficulties at time of authentication in systems that use two-factor authentication mechanisms for example because they may be forced to carry extra devices to be authenticated more accurately. This is however the tradeoff between ease-of-use and having a secure system that may be decided by the users and not the security providers. In this paper we present a new two-factor authentication mechanism that secures systems and at the same time is easier to use. We have used mnemonic features and the cache concept to achieve ease-of-use and security, respectively. Also, we have tested our method with almost 6500 users in real world using The Mechanical Turk Developer Sandbox.

  8. Image Processing Algorithms – A Comprehensive Study

    Directory of Open Access Journals (Sweden)

    Mahesh Prasanna K

    2014-06-01

    Full Text Available Digital image processing is an ever expanding and dynamic area with applications reaching out into our everyday life such as medicine, space exploration, surveillance, authentication, automated industry inspection and many more areas. These applications involve different processes like image enhancement and object detection [1]. Implementing such applications on a general purpose computer can be easier, but not very time efficient due to additional constraints on memory and other peripheral devices. Application specific hardware implementation offers much greater speed than a software implementation. With advances in the VLSI (Very Large Scale Integrated technology hardware implementation has become an attractive alternative. Implementing complex computation tasks on hardware and by exploiting parallelism and pipelining in algorithms yield significant reduction in execution times [2].

  9. B Plant process piping replacement feasibility study

    Energy Technology Data Exchange (ETDEWEB)

    Howden, G.F.

    1996-02-07

    Reports on the feasibility of replacing existing embedded process piping with new more corrosion resistant piping between cells and between cells and a hot pipe trench of a Hanford Site style canyon facility. Provides concepts for replacement piping installation, and use of robotics to replace the use of the canyon crane as the primary means of performing/supporting facility modifications (eg, cell lining, pipe replacement, equipment reinstallation) and operational maintenenace.

  10. Coastal and Submesoscale Process Studies for ASIRI

    Science.gov (United States)

    2017-01-30

    seasonal Monsoonal forecast , ocean-atmosphere coupled models 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF a. REPORT b. ABSTRACT c. THIS PAGE...and air-sea interaction in the Bay of Bengal. This, in the long run, would contribute toward improving the intra- seasonal Monsoonal forecast in...of upper ocean processes and air-sea interaction in the Bay of Bengal. This, in the long run , would contribute toward improving the intra- seasonal

  11. A STUDY ON QUALITY ANALYSIS MEASURING PROCESS

    Directory of Open Access Journals (Sweden)

    Liliana LUCA

    2016-12-01

    Full Text Available The paper presents the results of a study concerning the use of the Ishikawa diagram in analyzing the causes that determine errors in the measuring the sizes of the pieces of machine construction field. The studied problem was "errors in the measurement process” and this constitutes the head of the Ishikawa diagram skeleton.All the possible, main and secondary causes that could generate the studied problem were identified. The paper shows the potential causes of the studied problem, which were firstly grouped in fives categories, as follows: man/people methods, machines/ measuring devices, material/ piece of measured, environment. Performing the Ishikawa diagram in a more detailed form in order to determine the potential causes of a found defect has the advantage that it offers the possibility to identify and analyze all factors, which relate to the problem studied. The paper presented a formula for the Ishikawa diagram was determined, 4M+E.

  12. Construction of 2Ⅲm-(m-κ) Designs with the Maximum Number of Clear Two-factor Interactions

    Institute of Scientific and Technical Information of China (English)

    Gui-Jun Yang

    2007-01-01

    It is useful to know the maximum number of clear two-factor interactions in a 2Ⅲm-(m-k) design.This paper provides a method to construct a 2Ⅲm-(m-k) design with the maximum number of clear two-factor interactions. And it is proved that the resulting designs have more clear two-factor interactions than those constructed by Tang et al.[6]. Moreover, the designs constructed are shown to have concise grid representations.

  13. BENCH SCALE SALTSTONE PROCESS DEVELOPMENT MIXING STUDY

    Energy Technology Data Exchange (ETDEWEB)

    Cozzi, A.; Hansen, E.

    2011-08-03

    The Savannah River National Laboratory (SRNL) was requested to develop a bench scale test facility, using a mixer, transfer pump, and transfer line to determine the impact of conveying the grout through the transfer lines to the vault on grout properties. Bench scale testing focused on the effect the transfer line has on the rheological property of the grout as it was processed through the transfer line. Rheological and other physical properties of grout samples were obtained prior to and after pumping through a transfer line. The Bench Scale Mixing Rig (BSMR) consisted of two mixing tanks, grout feed tank, transfer pump and transfer hose. The mixing tanks were used to batch the grout which was then transferred into the grout feed tank. The contents of the feed tank were then pumped through the transfer line (hose) using a progressive cavity pump. The grout flow rate and pump discharge pressure were monitored. Four sampling stations were located along the length of the transfer line at the 5, 105 and 205 feet past the transfer pump and at 305 feet, the discharge of the hose. Scaling between the full scale piping at Saltstone to bench scale testing at SRNL was performed by maintaining the same shear rate and total shear at the wall of the transfer line. The results of scaling down resulted in a shorter transfer line, a lower average velocity, the same transfer time and similar pressure drops. The condition of flow in the bench scale transfer line is laminar. The flow in the full scale pipe is in the transition region, but is more laminar than turbulent. The resulting plug in laminar flow in the bench scale results in a region of no-mixing. Hence mixing, or shearing, at the bench scale should be less than that observed in the full scale, where this plug is non existent due to the turbulent flow. The bench scale tests should be considered to be conservative due to the highly laminar condition of flow that exists. Two BSMR runs were performed. In both cases, wall

  14. Spectral study on feldspar thermoluminescence process

    Institute of Scientific and Technical Information of China (English)

    GONG GeLian; LIU ShunSheng; XIA Bin; SUN WeiDong; HUANG BaoLin

    2008-01-01

    Feldspar thermoluminescence fading phenomena were investigated here by using newly-constructed thermoluminescence spectrometer on the basis of charge-cou-pled detector, and thereafter the discussion and explanation on feldspar TL fading mechanism were presented.The experimental results show that the fading rate of feldspar TL depends on both wavelength and stimulated temperature, and normally the feldspar TL in every region of wavelength and temperature shows different traits, namely the low temperature TL (170℃-190℃) fading at the rate of logarith-mic function and furthermore the TL of different wavelengths fading at approxi-mately the same rate on the condition of 160℃ preheating.While the medium and high temperature TLs (290℃-400℃) do not show much thermal fading, their fading rate at room temperature invariably correlates well with their wavelength, namely the longer TL wavelength, the slower TL fading rate.The thermal instability of traps and the quantum-mechanical tunneling effects can explain the above fading phe-nomena respectively.It is recognized that feldspar TL fading depends on its wave-length, and furthermore new aspects of the solid thermoluminescence process can be displayed by the combination of three-dimensional TL spectral analysis and thermal fading or anomalous fading of TL for feldspar.

  15. Spectral study on feldspar thermoluminescence process

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Feldspar thermoluminescence fading phenomena were investigated here by using newly-constructed thermoluminescence spectrometer on the basis of charge-cou-pled detector,and thereafter the discussion and explanation on feldspar TL fading mechanism were presented. The experimental results show that the fading rate of feldspar TL depends on both wavelength and stimulated temperature,and normally the feldspar TL in every region of wavelength and temperature shows different traits,namely the low temperature TL (170℃-190℃) fading at the rate of logarith-mic function and furthermore the TL of different wavelengths fading at approxi-mately the same rate on the condition of 160℃ preheating. While the medium and high temperature TLs (290℃-400℃) do not show much thermal fading,their fading rate at room temperature invariably correlates well with their wavelength,namely the longer TL wavelength,the slower TL fading rate. The thermal instability of traps and the quantum-mechanical tunneling effects can explain the above fading phe-nomena respectively. It is recognized that feldspar TL fading depends on its wave-length,and furthermore new aspects of the solid thermoluminescence process can be displayed by the combination of three-dimensional TL spectral analysis and thermal fading or anomalous fading of TL for feldspar.

  16. Cryptanalysis and Security Improvements of ‘Two-Factor User Authentication in Wireless Sensor Networks’

    Directory of Open Access Journals (Sweden)

    Muhammad Khurram Khan

    2010-03-01

    Full Text Available User authentication in wireless sensor networks (WSN is a critical security issue due to their unattended and hostile deployment in the field. Since sensor nodes are equipped with limited computing power, storage, and communication modules; authenticating remote users in such resource-constrained environments is a paramount security concern. Recently, M.L. Das proposed a two-factor user authentication scheme in WSNs and claimed that his scheme is secure against different kinds of attack. However, in this paper, we show that the M.L. Das-scheme has some critical security pitfalls and cannot be recommended for real applications. We point out that in his scheme: users cannot change/update their passwords, it does not provide mutual authentication between gateway node and sensor node, and is vulnerable to gateway node bypassing attack and privileged-insider attack. To overcome the inherent security weaknesses of the M.L. Das-scheme, we propose improvements and security patches that attempt to fix the susceptibilities of his scheme. The proposed security improvements can be incorporated in the M.L. Das-scheme for achieving a more secure and robust two-factor user authentication in WSNs.

  17. A two-factor theory for concussion assessment using ImPACT: memory and speed.

    Science.gov (United States)

    Schatz, Philip; Maerlender, Arthur

    2013-12-01

    We present the initial validation of a two-factor structure of Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) using ImPACT composite scores and document the reliability and validity of this factor structure. Factor analyses were conducted for baseline (N = 21,537) and post-concussion (N = 560) data, yielding "Memory" (Verbal and Visual) and "Speed" (Visual Motor Speed and Reaction Time) Factors; inclusion of Total Symptom Scores resulted in a third discrete factor. Speed and Memory z-scores were calculated, and test-retest reliability (using intra-class correlation coefficients) at 1 month (0.88/0.81), 1 year (0.85/0.75), and 2 years (0.76/0.74) were higher than published data using Composite scores. Speed and Memory scores yielded 89% sensitivity and 70% specificity, which was higher than composites (80%/62%) and comparable with subscales (91%/69%). This emergent two-factor structure has improved test-retest reliability with no loss of sensitivity/specificity and may improve understanding and interpretability of ImPACT test results.

  18. MECHANISTIC STUDIES OF IMPROVED FOAM EOR PROCESSES

    Energy Technology Data Exchange (ETDEWEB)

    William R. Rossen

    2003-03-31

    The objective of this research is to widen the application of foam to enhanced oil recovery (EOR) by investigating fundamental mechanisms of foams in porous media. This research will lay the groundwork for more applied research on foams for improved sweep efficiency in miscible gas, steam and surfactant-based EOR. Task 1 investigates the pore-scale interactions between foam bubbles and polymer molecules. Task 2 examines the mechanisms of gas trapping, and interaction between gas trapping and foam effectiveness. Task 3 investigates mechanisms of foam generation in porous media. Significant progress was made during this period on all three Tasks. Regarding Task 1, we studied the behavior of foam made without polymer, with low-molecular-weight and high-molecular-weight polyacrylamide, and with xanthan polymer in sandpacks. Results consistently showed that polymer does not stabilize foam in porous media per se. Rather, it destabilizes foam to some extent, but may increase the viscosity of water sufficiently to increase the resistance to flow in spite of the lower intrinsic stability of the foam. This is consistent with the hypothesis the motivated our study. Results also showed that polymer shifts behavior from the high-quality foam-flow regime toward the low-quality regime, consistent with our initial hypothesis. Other aspects of the experimental results were puzzling and are discussed in the text of this report. Research on Task 2 included building an apparatus for gas-phase tracer tests for direct measurement of trapped-gas saturation with foam. We also investigated the nature of the low-quality foam regime, which is thought to be controlled by gas trapping and mobilization. In both the studies of polymers and foam and separate studies of CO{sub 2} foam, we observed behavior that seems to be related to the low-quality regime, but shows unexpected trends: specifically, a decrease in pressure gradient with increasing liquid injection rate, at fixed gas injection rate

  19. Psychology and the study of marital processes.

    Science.gov (United States)

    Gottman, J M

    1998-01-01

    The divorce rate in the United States is extremely high. It is estimated that between 50% and 67% of first marriages end in divorce. For second marriages, failure rates are even higher. There are strong negative consequences to separation and divorce on the mental and physical health of both spouses, including increased risk for psychopathology, increased rates of automobile accidents, and increased incidence of physical illness, suicide, violence, homicide, significant immunosuppression, and mortality from diseases. In children, marital distress, conflict, and disruption are associated with depression, withdrawal, poor social competence, health problems, poor academic performance, and a variety of conduct-related difficulties. Though intervention techniques might be expected to reduce these grim statistics, our best scholars have concluded that marital therapy is at a practical and theoretical impasse. This article discusses the progress of research on the study of marriage.

  20. Theoretical studies on aerosol agglomeration processes

    Energy Technology Data Exchange (ETDEWEB)

    Lehtinen, K.E.J. [VTT Energy, Espoo (Finland). Energy Use

    1997-12-31

    In this thesis, theoretical modeling of certain aerosol systems has been presented. At first, the aerosol general dynamic equation is introduced, along with a discretization routine for its numerical solution. Of the various possible phenomena affecting aerosol behaviour, this work is mostly focused on aerosol agglomeration. The fundamentals of aerosol agglomeration theory are thus briefly reviewed. The two practical applications of agglomeration studied in this thesis are flue gas cleaning using an electrical agglomerator and nanomaterial synthesis with a free jet reactor. In an electrical agglomerator the aerosol particles are charged and brought into an alternating electric field. The aim is to remove submicron particles from flue gases by collisions with larger particles before conventional gas cleaning devices that have a clear penetration window in the problematic 0.1-1{mu}m size range. A mathematical model was constructed to find out the effects of the different system parameters on the agglomerator`s performance. A crucial part of this task was finding out the collision efficiencies of particles of varying size and charge. The original idea was to use unipolar charging of the particles, and a laboratory scale apparatus was constructed for this purpose. Both theory and experiments clearly show that significant removal of submicron particles can not be achieved by such an arrangement. The theoretical analysis further shows that if the submicron particles and the large collector particles were charged with opposite polarity, significant removal of the submicron particles could be obtained. The second application of agglomeration considered in this thesis is predicting/controlling nanoparticle size in the gas-to-particle aerosol route to material synthesis. In a typical material reactor, a precursor vapor reacts to form molecules of the desired material. In a cooling environment, a particulate phase forms, the dynamics of which are determined by the rates of

  1. A comparative study on microwave and routine tissue processing

    Directory of Open Access Journals (Sweden)

    T Mahesh Babu

    2011-01-01

    Conclusions: The individual scores by different observers regarding the various parameters included in the study were statistically insignificant, the overall quality of microwave-processed and microwave-stained slides appeared slightly better than conventionally processed and stained slides.

  2. Pre-attentive processing and schizophrenia: animal studies.

    NARCIS (Netherlands)

    Ellenbroek, B.A.

    2004-01-01

    RATIONALE: Schizophrenia is characterized by a large variety of cognitive symptoms, among which information processing deficits have been extensively studied. So far, these aspects have been found to be remarkably stable and effective treatment is still lacking. Traditionally, information processing

  3. Weak minimum aberration and maximum number of clear two-factor interactions in 2

    Institute of Scientific and Technical Information of China (English)

    YANG; Guijun

    2005-01-01

    [1]Wu, C. F. J., Chen, Y., A graph-aided method for planning two-level experiments when certain interactions are important, Technometrics, 1992, 34: 162-175.[2]Fries, A., Hunter, W, G., Minimum aberration 2к-p designs, Technometrics, 1980, 22: 601-608.[3]Chen, H., Hedayat, A. S., 2n-l designs with weak minimum aberration, Ann. Statist., 1996, 24: 2536-2548.[4]Chen, J., Some results on 2n-к fractional factorial designs and search for minimum aberration designs, Ann.Statist., 1992, 20: 2124-2141.[5]Chen, J., Intelligent search for 213-6 and 214-7 minimum aberration designs, Statist. Sinica, 1998, 8: 1265-1270.[6]Chen, J., Sun, D. X., Wu, C. F. J., A catalogue of two-level and three-level fractional factorial designs with small runs, Internat. Statist. Rev., 1993, 61: 131-145.[7]Chen, J., Wu, C. F. J., Some results on 2n-к fractional factorial designs with minimum aberration or optimal moments, Ann. Statist., 1991, 19: 1028-1041.[8]Cheng, C. S., Mukerjee, R., Regular fractional factorial designs with minimum aberration and maximum estimation capacity, Ann. Statist., 1998, 26: 2289-2300.[9]Cheng, C. S., Steinberg, D. M., Sun, D. X., Minimum aberration and model robustness for two-level fractional factorial designs, J. Roy. Statist. Soc. Ser. B, 1999, 61: 85-93.[10]Draper, N. R., Lin, D. K. J., Capacity consideration for two-level fractional factorial designs, J. Statist. Plann.Inference, 1990, 24: 25-35.[11]Fang, K. T., Mukerjee, R., A connection between uniformity and aberration in regular fractions of two-level factorial, Biometrika, 2000, 87: 193-198.[12]Tang, B., Wu, C. F. J., Characterization of minimum aberration 2n-к designs in terms of their complementary designs, Ann. Statist., 1996, 24: 2549-2559.[13]Chen, H., Hedayat, A. S., 2n-m designs with resolution Ⅲ or Ⅳ containing clear two-factor interactions, J.Statist. Plann. Inference, 1998, 75: 147-158.[14]Tang, B., Ma, F., Ingram, D., Wang, H., Bounds on the maximum numbers of clear two factor

  4. Herzberg’s Two Factor Theory of Work Motivation: The Case of Tourism Employees

    Directory of Open Access Journals (Sweden)

    Daša Fabjan

    2013-01-01

    Full Text Available The article focuses on work motivation of Slovenian front-line employeesworking in tourism. The motivation is analyzed using a Herzberg’sTwo Factor Theory of work motivation, which is based on two factorgroups of work motivation – growth factors that motivate, and hygienefactors that do not motivate, yet their absence causes work dissatisfaction.The empirical research results indicated that growth factors (e.g.recognition and responsibility have a major impact on work motivation,while hygiene factors (e.g. salary did not show statistically significantimpact. The findings of the research could be useful for managementin tourism industry, who should give more attention to growthfactors or strengthen their meaning by increasing front-line employees’responsibilities, recognition, enabling additional trainings andgiving adequate information as these factor have a pivotal meaning foremployees’ work motivation.

  5. Water retention of rigid soils from a two-factor model for clay

    CERN Document Server

    Chertkov, V Y

    2014-01-01

    Water retention is one of the key soil characteristics. Available models of soil water retention relate to the curve-fitting type. The objective of this work is to suggest a physical model of water retention (drying branch) for soils with a rigid matrix. "Physical" means the prediction based on the a priori measured or estimated soil parameters with a clear physical meaning. We rely on the two-factor model of clay that takes into account the factors of capillarity and shrinkage. The key points of the model to be proposed are some weak pseudo shrinkage that the rigid soils demonstrate according to their experimental water retention curves, and some specific properties of the rigid grain matrix. The three input parameters for prediction of soil water retention with the rigid grain matrix include inter-grain porosity, as well as maximum and minimum grain sizes. The comparison between measured and predicted sand water retention curves for four different sands is promising.

  6. 2CAuth: A New Two Factor Authentication Scheme Using QR-Code

    Directory of Open Access Journals (Sweden)

    N. Harini

    2013-04-01

    Full Text Available Password based schemes has been the standard means of authentication over decades. Enhancements use entities like ownership (something one possess, knowledge (something one knows, and inherence (something one is as first factor and mobile phones as token less second factor, in combinations, to offer different levels of security assurances, trading off usability. In this paper we present ‘2CAuth’ a new two factor authentication scheme that enhances secure usage of application information and preserves usability, without sacrificing user’s privacy. A significant feature of the scheme is that it DOES NOT call for any synchronization between Mobile Network Operator (MNO and users. The analysis of the scheme clearly brings out itseffectiveness in terms of its usability even at times of peak loads on mobile networks. The scheme has the dual advantage of carrying out the verification of transactions which involve the physical presence of the user as well as those to be done in his absence.

  7. Analysis of the Data From a Technical Processing Cost Study.

    Science.gov (United States)

    Rocke, Hans Joachim

    This study was conducted to analyze and summarize raw data obtained from a 1972 study: "Report on a Cost Study of Specific Technical Processing Activities of the California State University and College Libraries" with the hypothesis that the cost of technical processes increases as the production volume both rises above and falls below…

  8. Study on the Process of Gender Identification : Process by Children in Kindergarten Peer Groups

    OpenAIRE

    大滝, 世津子; Setsuko, OHTAKI; 東京大学大学院; Graduate School, The University of Tokyo

    2006-01-01

    The purpose of this study is to examine the relationship between the formation of groups in kindergarten and the process of gender identification by children through their kindergarten life. In the field of sociology of education in Japan, there have been some studies on the process of gender identification. However, they have focused on the intensification process of gender categories, but tended to ignore the trigger that leads children to recognize their own "correct" gender, and how they ...

  9. Evaluating Students' Beliefs in Problem Solving Process: A Case Study

    Science.gov (United States)

    Ozturk, Tugba; Guven, Bulent

    2016-01-01

    Problem solving is not simply a process that ends when an answer is found; it is a scientific process that evolves from understanding the problem to evaluating the solution. This process is affected by several factors. Among these, one of the most substantial is belief. The purpose of this study was to evaluate the beliefs of high school students…

  10. Historical Process and Semantic Study of Rhetorical Apostrophe

    Directory of Open Access Journals (Sweden)

    Abdollah Radmard

    2013-05-01

    Full Text Available Abstract Apostrophe means paying attention to someone or something. It is a literary technique which has not been studied deeply despite its widespread role in fo regrounding the literary language , norm-breaking and creating a sense of defamiliarization in the audience. Its meaning is limited to the " transferring the speaker from the absence to the audience and vice versa ". In rhetorical texts apostrophe is attributed to the three areas of semantics , eloquence and rhetoric. Such triple attribution is due to two factors : the mixing of rhetoric areas in previous periods and the extension of apostrophe 's meaning in rhetorical books. But it seems that a variety of notions which are raised in traditional rhetorical books should be examined in the field of semantics. The only type of apostrophe which can be analyzed in rhetoric is the one proposed in some contemporary books as the result of semantic extension and is used in the vertical axis of poem. Therefore , regarding semantic extension, we consider apostrophe as any change in semantic structure , narrative , texture , etc which occurs without any background and surprises the reader. The presence of different types of apostrophe in various branches of rhetoric and literature lead to the creation of many names for this literary technique. This technique was not called apostrophe in the first period of the Arab rhetoric which coincided with the rise of Islam in Ibn Motaz period. It was always called “metonymy”. Then Asmaee used apostrophe in its technical sense in the second century (A.H and Ibn Motaz presented it in Albadi. Gradually and in later periods rhetoricians such as Qodame Ibn Jafar, Ibn Rashigh Ghiravani, Abu Halal Asgari etc. gave other names to this technique such as inflection and dissuasion, completion, objection, Estetrad, Talvin, Shojaol Arabiyat and so on. Apostrophe has the same meaning in Persian rhetorical books. The first rhetorical book is Tarjomanol Balaghat written

  11. A STUDY ON IMPROVING INFORMATION PROCESSING ABILITIES BASED ON PBL

    Directory of Open Access Journals (Sweden)

    Du Gyu KIM,

    2014-04-01

    Full Text Available This study examined an instruction method for the improvement of information processing abilities in elementary school students. Current elementary students are required to develop information processing abilities to create new knowledge for this digital age. There is, however, a shortage of instruction strategies for these information processing abilities. This research proposes a method for teaching information processing abilities based on a problem-based learning model, and was tested with elementary students. The students developed an improved ability to create new knowledge and to present relationships with information through the process of problem solving. This study performed experimental research by comparing pre- and post-tests with twenty-three fifth grade elementary students over the course of eight months. This study produced a remarkable improvement in information selection, information reliability, information classification, information analysis, information comparison, and information internalization. This study presents an improved methodology for the teaching of information processing abilities.

  12. Case Studies in Modelling, Control in Food Processes.

    Science.gov (United States)

    Glassey, J; Barone, A; Montague, G A; Sabou, V

    2017-01-01

    This chapter discusses the importance of modelling and control in increasing food process efficiency and ensuring product quality. Various approaches to both modelling and control in food processing are set in the context of the specific challenges in this industrial sector and latest developments in each area are discussed. Three industrial case studies are used to demonstrate the benefits of advanced measurement, modelling and control in food processes. The first case study illustrates the use of knowledge elicitation from expert operators in the process for the manufacture of potato chips (French fries) and the consequent improvements in process control to increase the consistency of the resulting product. The second case study highlights the economic benefits of tighter control of an important process parameter, moisture content, in potato crisp (chips) manufacture. The final case study describes the use of NIR spectroscopy in ensuring effective mixing of dry multicomponent mixtures and pastes. Practical implementation tips and infrastructure requirements are also discussed.

  13. Sensitivity study for s process nucleosynthesis in AGB stars

    Science.gov (United States)

    Koloczek, A.; Thomas, B.; Glorius, J.; Plag, R.; Pignatari, M.; Reifarth, R.; Ritter, C.; Schmidt, S.; Sonnabend, K.

    2016-03-01

    In this paper we present a large-scale sensitivity study of reaction rates in the main component of the s process. The aim of this study is to identify all rates, which have a global effect on the s process abundance distribution and the three most important rates for the production of each isotope. We have performed a sensitivity study on the radiative 13C-pocket and on the convective thermal pulse, sites of the s process in AGB stars. We identified 22 rates, which have the highest impact on the s-process abundances in AGB stars.

  14. Sensitivity study for s process nucleosynthesis in AGB stars

    CERN Document Server

    Koloczek, A; Glorius, J; Plag, R; Pignatari, M; Reifarth, R; Ritter, C; Schmidt, S; Sonnabend, K

    2016-01-01

    In this paper we present a large-scale sensitivity study of reaction rates in the main component of the $s$ process. The aim of this study is to identify all rates, which have a global effect on the $s$ process abundance distribution and the three most important rates for the production of each isotope. We have performed a sensitivity study on the radiative $^{13}$C-pocket and on the convective thermal pulse, sites of the $s$ process in AGB stars. We identified 22 rates, which have the highest impact on the $s$-process abundances in AGB stars.

  15. Study of Purchase Process Modeling and Reengineering Effects Evaluation

    Institute of Scientific and Technical Information of China (English)

    ZhenhuanJiang; LiangQuan; PeiwuDong

    2004-01-01

    Purchase process is an important part in the process of running an enterprise.For reengineering the process of'enterprise, raise business efficiency of enterprise , make enterprise competitive among complicated and changeable market environment. Use the method of planning to evaluate the technology modeling and method to set up evaluation index, based on the basic principle business process reengineering, studied the methods of modeling and evaluating of the reengineering of the purchase process. Given the intact method of modeling process. Give the mathematics express method and figure express method of the process, propose using PT reducing rate to evaluate the effect of the process reengineer, and has analysed three kinds of situations that affect the reducing rate of PT.

  16. Processing fluency hinders subsequent recollection: An electrophysiological study

    Directory of Open Access Journals (Sweden)

    Bingbing eLi

    2015-06-01

    Full Text Available Although many behavioural studies have investigated the effect of processing fluency on subsequent recognition memory, little research has examined the neural mechanism of this phenomenon. The present study aimed to explore the electrophysiological correlates of the effects of processing fluency on subsequent recognition memory by using an event-related potential (ERP approach. The masked repetition priming paradigm was used to manipulate processing fluency in the study phase, and the R/K paradigm was utilised to investigate which recognition memory process (familiarity or recollection was affected by processing fluency in the test phase. Converging behavioural and ERP results indicated that increased processing fluency impaired subsequent recollection. Results from the analysis of ERP priming effects in the study phase indicated that increased perceptual processing fluency of object features, reflected by the N/P 190 priming effect, can hinder encoding activities, reflected by the LPC priming effect, which leads to worse subsequent recollection based recognition memory. These results support the idea that processing fluency can influence subsequent recognition memory and provide a potential neural mechanism underlying this effect. However, further studies are needed to examine whether processing fluency can affect subsequent familiarity.

  17. Early left-hemispheric dysfunction of face processing in congenital prosopagnosia: an MEG study.

    Directory of Open Access Journals (Sweden)

    Christian Dobel

    Full Text Available BACKGROUND: Congenital prosopagnosia is a severe face perception impairment which is not acquired by a brain lesion and is presumably present from birth. It manifests mostly by an inability to recognise familiar persons. Electrophysiological research has demonstrated the relevance to face processing of a negative deflection peaking around 170 ms, labelled accordingly as N170 in the electroencephalogram (EEG and M170 in magnetoencephalography (MEG. The M170 was shown to be sensitive to the inversion of faces and to familiarity--two factors that are assumed to be crucial for congenital prosopagnosia. In order to locate the cognitive dysfunction and its neural correlates, we investigated the time course of neural activity in response to these manipulations. METHODOLOGY: Seven individuals with congenital prosopagnosia and seven matched controls participated in the experiment. To explore brain activity with high accuracy in time, we recorded evoked magnetic fields (275 channel whole head MEG while participants were looking at faces differing in familiarity (famous vs. unknown and orientation (upright vs. inverted. The underlying neural sources were estimated by means of the least square minimum-norm-estimation (L2-MNE approach. PRINCIPAL FINDINGS: The behavioural data corroborate earlier findings on impaired configural processing in congenital prosopagnosia. For the M170, the overall results replicated earlier findings, with larger occipito-temporal brain responses to inverted than upright faces, and more right- than left-hemispheric activity. Compared to controls, participants with congenital prosopagnosia displayed a general decrease in brain activity, primarily over left occipitotemporal areas. This attenuation did not interact with familiarity or orientation. CONCLUSIONS: The study substantiates the finding of an early involvement of the left hemisphere in symptoms of prosopagnosia. This might be related to an efficient and overused featural

  18. Searching for a two-factor model of marriage duration: commentary on Gottman and Levenson.

    Science.gov (United States)

    DeKay, Michael L; Greeno, Catherine G; Houck, Patricia R

    2002-01-01

    Gottman and Levenson (2002) report a number of post hoc ordinary least squares regressions to "predict" the length of marriage, given that divorce has occurred. We argue that the type of statistical model they use is inappropriate for answering clinically relevant questions about the causes and timing of divorce, and present several reasons why an alternative family of models called duration models would be more appropriate. The distribution of marriage length is not bimodal, as Gottman and Levenson suggest, and their search for a two-factor model for explaining marriage length is misguided. Their regression models omit many variables known to affect marriage length, and instead use variables that were pre-screened for their predictive ability. Their final model is based on data for only 15 cases, including one unusual case that has undue influence on the results. For these and other technical reasons presented in the text, we believe that Gottman and Levenson's results are not replicable, and that they should not be used to guide interventions for couples in clinical settings.

  19. Two-factor Analysis of Employee Motivation at "Postal Traffic – Department in Novi Sad"

    Directory of Open Access Journals (Sweden)

    Jelena Pandža

    2015-06-01

    Full Text Available Motivation is a highly individual matter. It depends not only on the actual needs of the employee, but also on his personality, experience and scale of values. The employee work motivation directly influences the company productivity. In order to achieve the maximum level of motivation, managers need to know their needs and motivating factors of employees they supervise. Money is the key motivation factor for people, who need money to maintain their own existence. Non-financial factors of motivation also have a growing importance on the individual employee motivation. The main objective of this paper is to determinate the main intrinsic and extrinsic factors of employee motivation, and its effect on the provided service quality in the "Postal Traffic - Department in Novi Sad". The research is based on Herzberg's Two-factor theory. The results of the research showed, that majority of the factors is rated fairly high. The "Salary" is the lowest rated factor, while the factor "Colleagues" have the highest effect on employee motivation.

  20. A two-Factor Asset Pricing Model and the Fat Tail Distribution of Firm Sizes

    CERN Document Server

    Malevergne, Y

    2007-01-01

    In the standard equilibrium and/or arbitrage pricing framework, the value of any asset is uniquely specified from the belief that only the systematic risks need to be remunerated by the market. Here, we show that, even for arbitrary large economies when the distribution of the capitalization of firms is sufficiently heavy-tailed as is the case of real economies, there may exist a new source of significant systematic risk, which has been totally neglected up to now but must be priced by the market. This new source of risk can readily explain several asset pricing anomalies on the sole basis of the internal-consistency of the market model. For this, we derive a theoretical two-factor model for asset pricing which has empirically a similar explanatory power as the Fama-French three-factor model. In addition to the usual market risk, our model accounts for a diversification risk, proxied by the equally-weighted portfolio, and which results from an ``internal consistency factor'' appearing for arbitrary large econ...

  1. Designing Robust Process Analytical Technology (PAT) Systems for Crystallization Processes: A Potassium Dichromate Crystallization Case Study

    DEFF Research Database (Denmark)

    Abdul Samad, Noor Asma Fazli Bin; Sin, Gürkan

    2013-01-01

    The objective of this study is to test and validate a Process Analytical Technology (PAT) system design on a potassium dichromate crystallization process in the presence of input uncertainties using uncertainty and sensitivity analysis. To this end a systematic framework for managing uncertaintie...

  2. Fractions of Rechtschaffner matrices as supersaturated designs in screening experiments aimed at evaluating main and two-factor interaction effects.

    Science.gov (United States)

    Cela, R; Phan-Tan-Luu, R; Claeys-Bruno, M; Sergent, M

    2012-04-06

    Optimal fractions of resolution V design matrices proposed by Rechtschaffner in 1967 are developed and applied as supersaturated designs in screening experiments. Rechtschaffner matrices allow evaluation of all main factors and two-factor interactions, which in many real-world studies are of practical significance. However, the number of experimental runs increases rapidly with the number of factors in the matrices, which are therefore impractical for more than 5-6 factors. On the contrary, saturated fractions based on Hadamard matrices, which are commonly applied in screening studies, cannot evaluate the interaction effects. Here, a procedure for selecting the optimum fractions of Rechtschaffner matrices is presented and provides supersaturated matrices that are well adapted to a variety of problems, thus allowing the development of screening studies with a relatively small number of experiments. The procedures developed to derive the size-reduced matrices and to evaluate the active factors are discussed and compared in terms of efficiency and reliability, by means of simulation studies and application to a real problem. These fractions are the first supersaturated design matrices capable of estimating interaction effects. Additionally, one important advantage of these supersaturated matrices is that they enable development of follow-up procedures in cases of inconclusive results, by enlarging the matrix and eventually resolving the full Rechtschaffner matrix of departure when it is necessary to evaluate the active factors and their interactions.

  3. Study of Injection Process Capability in Production of Plastic Boxes

    Directory of Open Access Journals (Sweden)

    Lestyánszka Škůrková Katarína

    2015-06-01

    Full Text Available Ensuring the process capability currently means the warranty that produced products will be in accordance with requirements, both on the company‘s as well as customer‘s side. This study focuses on the statistical control of injection process capability in serial production in a company focusing on products for healthcare. The injection process is evaluated by control charts, specifically by control chart for average and range ( x̄ , R. As the results showed, based on the chart for average and range, we are able to say that the injection process is under statistical control. The requirement for process capability was met; the indices of process capability Cp and Cpk are higher than the determined value 1.33. The normality of measured values was verified by histogram. The obtained values are: Cp = 1.85 and Cpk = 1.82. Therefore, we may consider the process as capable.

  4. Study on customization process and application via Internet

    Institute of Scientific and Technical Information of China (English)

    周康渠; YANG; Yu; 等

    2002-01-01

    Networked customization is an important way for enterprises to satisfy customers'individual requirements.From this point of view,the study on networked customization process and application is started with analyzing the customization process in detail,in which the customization process is divided into 6 stages including information capture,need submission,need affirmation,need interaction,creating customization orders and customization production.A general customization process chart for common products is presented,which describes the communication between customers and enterprises in the entire customization process.The method of analyzing customization process is pressented.The product customization subsystem in the system of ceramic product marketing and customization of Chongqing CHN & CHN Ceramics Co.Ltd.is introduced to explicate the process of customization via Internet.

  5. Study of Injection Process Capability in Production of Plastic Boxes

    OpenAIRE

    Lestyánszka Škůrková Katarína; Kudičová Jozefína

    2015-01-01

    Ensuring the process capability currently means the warranty that produced products will be in accordance with requirements, both on the company‘s as well as customer‘s side. This study focuses on the statistical control of injection process capability in serial production in a company focusing on products for healthcare. The injection process is evaluated by control charts, specifically by control chart for average and range ( x̄ , R). As the results showed, based on the chart for average an...

  6. Sensitivity study for s process nucleosynthesis in AGB stars

    OpenAIRE

    2016-01-01

    In this paper we present a large-scale sensitivity study of reaction rates in the main component of the $s$ process. The aim of this study is to identify all rates, which have a global effect on the $s$ process abundance distribution and the three most important rates for the production of each isotope. We have performed a sensitivity study on the radiative $^{13}$C-pocket and on the convective thermal pulse, sites of the $s$ process in AGB stars. We identified 22 rates, which have the highes...

  7. Green Diesel from Hydrotreated Vegetable Oil Process Design Study

    NARCIS (Netherlands)

    Hilbers, T.J.; Sprakel, L.M.J.; Enk, van den L.B.J.; Zaalberg, B.; Berg, van den H.; Ham, van der A.G.J.

    2015-01-01

    A systematic approach was applied to study the process of hydrotreating vegetable oils. During the three phases of conceptual, detailed, and final design, unit operations were designed and sized. Modeling of the process was performed with UniSim Design®. Producing green diesel and jet fuel from vege

  8. A qualitative single case study of parallel processes

    DEFF Research Database (Denmark)

    Jacobsen, Claus Haugaard

    2007-01-01

    Parallel process in psychotherapy and supervision is a phenomenon manifest in relationships and interactions, that originates in one setting and is reflected in another. This article presents an explorative single case study of parallel processes based on qualitative analyses of two successive ra...

  9. A Study in generative process : The art of theorizing

    NARCIS (Netherlands)

    Zandee, D.P.

    2005-01-01

    This dissertation is an inquiry in the process of generativity. The study was inspired by the notion that generative process is vital for the continuous renewal of possibility in our personal, social and organized existence. Generativity is defined in the following two dimensions: an idea, event, or

  10. A qualitative single case study of parallel processes

    DEFF Research Database (Denmark)

    Jacobsen, Claus Haugaard

    2007-01-01

    Parallel process in psychotherapy and supervision is a phenomenon manifest in relationships and interactions, that originates in one setting and is reflected in another. This article presents an explorative single case study of parallel processes based on qualitative analyses of two successive...

  11. A Study on Translation Process Based on Relevance Theory

    Institute of Scientific and Technical Information of China (English)

    吴竞

    2015-01-01

    Relevance theory belongs to the field of pragmatics. Translation is a kind of communicative activity in nature. In the frame of relevance theory, translation is the process of cognition and inference. This paper focuses on the study of trans-lation process on the basis of relevance theory in order to improve the practice of translation.

  12. Green Diesel from Hydrotreated Vegetable Oil Process Design Study

    NARCIS (Netherlands)

    Hilbers, T.J.; Sprakel, Lisette Maria Johanna; van den Enk, L.B.J.; Zaalberg, B.; van den Berg, Henderikus; van der Ham, Aloysius G.J.

    2015-01-01

    A systematic approach was applied to study the process of hydrotreating vegetable oils. During the three phases of conceptual, detailed, and final design, unit operations were designed and sized. Modeling of the process was performed with UniSim Design®. Producing green diesel and jet fuel from

  13. A Study on Improving Information Processing Abilities Based on PBL

    Science.gov (United States)

    Kim, Du Gyu; Lee, JaeMu

    2014-01-01

    This study examined an instruction method for the improvement of information processing abilities in elementary school students. Current elementary students are required to develop information processing abilities to create new knowledge for this digital age. There is, however, a shortage of instruction strategies for these information processing…

  14. Studies on additive properties of some processing operations

    Directory of Open Access Journals (Sweden)

    Jerzy Malewski

    2013-09-01

    Full Text Available The accuracy of prediction of mineral processing operation by partial effects summation is analyzed. Methodological and practical aspects of the problem are discussed using laboratory studies of selected comminution and classifying operations as examples. Laboratory experiments show that the effects of examined mineral processing operation depend on simultaneously running processes of classification and comminution. The influence rate of interaction between both processes on the final results is significant, but in some cases it may be neglected. The obtained results have preliminary character and needed a further verification.

  15. A Study on the Kinetic Characteristics of Transmutation Process Reactor

    Energy Technology Data Exchange (ETDEWEB)

    Chung, Chang Hyun; You, Young Woo; Cho, Jae seon; Huh, Chang Wook; Kim, Doh Hyung [Seoul National University, Seoul (Korea, Republic of)

    1997-07-01

    The purpose of this study is to examine the transient heat transfer characteristics of liquid mental as the coolant used in accelerator-driven transmutation process reactor which is related the disposal of high-level radioactive nuclide. At current stage, the accelerator-driven transmutation process is investigated as the most appropriate method among many transmutation process methods. In this study, previous research works are investigated especially about the thermal hydraulics and kinetic behavior of coolant material including heat transfer of coolant in transmutation process reactor. A study on the heat transfer characteristics of liquid metal is performed based on the thermal hydraulic kinetic characteristics of liquid metal reactor which uses liquid metal coolant. Based on this study, the most appropriate material for the coolant of transmutation reactor will be recommended. 53 refs., 15 tabs., 33 figs. (author)

  16. Data assimilation in modeling ocean processes: A bibliographic study

    Digital Repository Service at National Institute of Oceanography (India)

    Mahadevan, R.; Fernandes, A.A.; Saran, A.K.

    An annotated bibliography on studies related to data assimilation in modeling ocean processes has been prepared. The bibliography listed here is not comprehensive and is not prepared from the original references. Information obtainable from...

  17. THE COMBINED PROCESSES STUDY FOR MANUFACTURING AIRCRAFT PARTS

    Directory of Open Access Journals (Sweden)

    Mr. Boris N. Maryin

    2016-06-01

    Full Text Available The article is devoted to research of the combined processes of forming tubular billets with various media in the process of bending-expanding, breaking-down -expanding while using thermal effects. The paper discusses the processes of forming tubular billets of hard punches, using elastic-granular materials, the peculiarities of forming tubular billets, while the breaking-down -expanding of crimp in a hard punch using elastic-granular bodies. The article presents experimental studies of the bending-expanding of tubular billets in horn-shaped blanks. The authors established the main features of billet distorting in the combined process. The article shows a diagram of the true distorting distribution in the process of stretching and compression in the horn-shaped blanks. The recommendations allow increasing the bending moment and realizing better shaping. The authors make conclusions about the prospects of the application of combined processes in air and rocket.

  18. Emergency Management Operations Process Mapping: Public Safety Technical Program Study

    Science.gov (United States)

    2011-02-01

    DRDC CSS CR 2011-09 i Emergency Management Operations Process Mapping : Public Security Technical Program Study Anet Greenley ...processus/outils). DRDC CSS CR 2011-09 iii Executive summary Emergency Management Operations Process Mapping PSTP Study [ Greenley , A...technique de sécurité publique – Etude DSTP [ Greenley , A.; Poursina, S.]; DRDC CSS CR 2011-09 L’objectif principal du Programme technique de sécurité

  19. Early Student Support for Process Studies of Surface Freshwater Dispersal

    Science.gov (United States)

    2016-06-24

    light field is varied to decay exponentially with depth. The spectra of tracer variance are computed for different growth rates and related to the...To) 06/24/2016 FINAL 12/01 /2012-03/31 /2016 4. TITLE AND SUBTITLE sa. CONTRACT NUMBER Early Student Support for Process Studies of Surface...ONRREPORT Early Student Support Process Studies of Surface Freshwater Dispersal June 24, 2016 Amala Mahadevan Woods Hole Oceanographic Institution

  20. OPTIMIZATION STUDY IN MANUFACTURING PROCESS FOR PC/ABS BLENDS

    Institute of Scientific and Technical Information of China (English)

    Huang Chenghung; Fung Chinping; Chang Shihhsing; Hwang Jiunren; Doong Jiliang

    2003-01-01

    The optimization of injection molding process for polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blends is studied using Taguchi method and principal component analysis (PCA). Four controllable process factors are studied at three levels each in the manufacturing process. The L9 orthogonal array is conducted to determine the optimum process factor/level combination for single quality of mechanical properties. In addition, the principal component analysis is employed to transform the correlated mechanical properties to a set of uncorrelated components and to evaluate a comprehensive index for multi-response cases. Then the optimum process factor/level combination for multiple qualities can be determined. Finally, the analysis of variance is used to find out the most influential injection molding parameter for single and multiple qualities problems.

  1. Department of Energy solar process heat program: FY 1991 solar process heat prefeasibility studies activity

    Science.gov (United States)

    Hewett, R.

    1992-11-01

    During fiscal year (FY) 1991, the US Department of Energy (DOE) Solar Process Heat Program implemented a Solar Process Heat Prefeasibility Studies activity. For Program purposes, a prefeasibility study is an engineering assessment that investigates the technical and economic feasibility of a solar system for a specific application for a specific end-user. The study includes an assessment of institutional issues (e.g., financing, availability of insurance, etc.) that impact the feasibility of the proposed solar project. Solar process heat technology covers solar thermal energy systems (utilizing flat plate or concentrating solar collectors) for water heating, water preheating, cooling/refrigeration, steam generation, ventilation air heating/preheating, etc., for applications in industry, commerce, and government. The studies are selected for funding through a competitive solicitation. For FY-91, six projects were selected for funding. As of 31 Aug. 1992, three teams had completed their studies. This paper describes the prefeasibility studies activity, presents the results from the study performed by United Solar Technologies, and summarizes the conclusions from the studies that have been completed to date and their implications for the Solar Process Heat Program.

  2. Designing Robust Process Analytical Technology (PAT) Systems for Crystallization Processes: A Potassium Dichromate Crystallization Case Study

    DEFF Research Database (Denmark)

    Abdul Samad, Noor Asma Fazli Bin; Sin, Gürkan

    2013-01-01

    The objective of this study is to test and validate a Process Analytical Technology (PAT) system design on a potassium dichromate crystallization process in the presence of input uncertainties using uncertainty and sensitivity analysis. To this end a systematic framework for managing uncertainties...... in the nucleation and crystal growth parameters affect the product-process performances (e.g. crystal size distribution (CSD)). Analysis of the proposed PAT system design (closedloop), on the other hand, shows that the effect of the input uncertainties on the outputs (product quality) is minimized, and the target...

  3. A Study on Translation Process Based on Relevance TheoryA Study on Translation Process Based on Relevance Theory

    Institute of Scientific and Technical Information of China (English)

    吴竞

    2015-01-01

    Relevance theory belongs to the field of pragmatics. Translation is a kind of communicative activity in nature. In the frame of relevance theory, translation is the process of cognition and inference. This paper focuses on the study of translation process on the basis of relevance theory in order to improve the practice of translation.

  4. Containerless Processing Studies in the MSFC Electrostatic Levitator

    Science.gov (United States)

    Rogers, J. R.; SanSoucie, M. P.

    2012-01-01

    Levitation or containerless processing represents an important tool in materials research. Levitated specimens are free from contact with a container, which permits studies of deeply undercooled melts, and high-temperature, highly reactive materials. Containerless processing provides data for studies of thermophysical properties, phase equilibria, metastable state formation, microstructure formation, undercooling, and nucleation. Levitation techniques include: acoustic, aero-acoustic, electromagnetic, and electrostatic. In microgravity, levitation can be achieved with greatly reduced positioning forces. Microgravity also reduces the effects of buoyancy and sedimentation in melts. The European Space Agency (ESA) and the German Aerospace Center (DLR) jointly developed an electromagnetic levitator facility (MSL-EML) for containerless materials processing in space. The MSL-EML will be accommodated in the European Columbus Facility on the International Space Station (ISS). The electrostatic levitator (ESL) facility at the Marshall Space Flight Center provides support for the development of containerless processing studies for the ISS. The capabilities of the facility and recent results will be discussed.

  5. Behavioral Processes in Long-Lag Intervention Studies.

    Science.gov (United States)

    Miller, Dale T; Dannals, Jennifer E; Zlatev, Julian J

    2017-05-01

    We argue that psychologists who conduct experiments with long lags between the manipulation and the outcome measure should pay more attention to behavioral processes that intervene between the manipulation and the outcome measure. Neglect of such processes, we contend, stems from psychology's long tradition of short-lag lab experiments where there is little scope for intervening behavioral processes. Studying process in the lab invariably involves studying psychological processes, but in long-lag field experiments it is important to study causally relevant behavioral processes as well as psychological ones. To illustrate the roles that behavioral processes can play in long-lag experiments we examine field experiments motivated by three policy-relevant goals: prejudice reduction, health promotion, and educational achievement. In each of the experiments discussed we identify various behavioral pathways through which the manipulated psychological state could have produced the observed outcome. We argue that if psychologists conducting long-lag interventions posited a theory of change that linked manipulated psychological states to outcomes via behavioral pathways, the result would be richer theory and more practically useful research. Movement in this direction would also permit more opportunities for productive collaborations between psychologists and other social scientists interested in similar social problems.

  6. A study of process parameters on workpiece anisotropy in the laser engineered net shaping (LENSTM) process

    Science.gov (United States)

    Chandra, Shubham; Rao, Balkrishna C.

    2017-06-01

    The process of laser engineered net shaping (LENSTM) is an additive manufacturing technique that employs the coaxial flow of metallic powders with a high-power laser to form a melt pool and the subsequent deposition of the specimen on a substrate. Although research done over the past decade on the LENSTM processing of alloys of steel, titanium, nickel and other metallic materials typically reports superior mechanical properties in as-deposited specimens, when compared to the bulk material, there is anisotropy in the mechanical properties of the melt deposit. The current study involves the development of a numerical model of the LENSTM process, using the principles of computational fluid dynamics (CFD), and the subsequent prediction of the volume fraction of equiaxed grains to predict process parameters required for the deposition of workpieces with isotropy in their properties. The numerical simulation is carried out on ANSYS-Fluent, whose data on thermal gradient are used to determine the volume fraction of the equiaxed grains present in the deposited specimen. This study has been validated against earlier efforts on the experimental studies of LENSTM for alloys of nickel. Besides being applicable to the wider family of metals and alloys, the results of this study will also facilitate effective process design to improve both product quality and productivity.

  7. Simplification of Process Integration Studies in Intermediate Size Industries

    DEFF Research Database (Denmark)

    Dalsgård, Henrik; Petersen, P. M.; Qvale, Einar Bjørn

    2002-01-01

    It can be argued that the largest potential for energy savings based on process integration is in the intermediate size industry. But this is also the industrial scale in which it is most difficult to make the introduction of energy saving measures economically interesting. The reasons...... associated with a given process integration study in an intermediate size industry. This is based on the observation that the systems that eventually result from a process integration project and that are economically and operationally most interesting are also quite simple. Four steps that may be used...... separately or in series ahead of or simultaneously with the conventional process integration procedures (for example, the pinch point method) are described and are applied to an industrial case study. It might be feared that the use of preselections and groupings would limit the "freedom of movement...

  8. A Study of Facilitating Cognitive Processes with Authentic Support

    Science.gov (United States)

    Shadiev, Rustam; Hwang, Wu-Yuin; Huang, Yueh-Min; Liu, Tzu-Yu

    2014-01-01

    This study designed learning activity to enhance students' cognitive processes. Students could learn in class and then apply and analyze new knowledge to solve daily life problems by taking pictures of learning objects in familiar authentic context, describing them, and sharing their homework with peers. This study carried out an experiment and it…

  9. Studying MHD and radiative processes in Sgr A*

    NARCIS (Netherlands)

    S. Dibi

    2014-01-01

    This thesis details four different studies of accretion and emission processes around the Galactic Center Sgr A*. We are studying Sgr A* in particular because it is the closest supermassive black hole and therefore we have incomparable observational data to test our theories and predictions. However

  10. METALS LEACHING FROM A MINERAL PROCESSING WASTE: A COLUMN STUDY

    Science.gov (United States)

    A mineral processing waste was used to study the effect of liquid to solid ratio (L/S) on the leaching behavior of metals. Leaching tests in the form of column and batch studies were carried out to investigate liquid to solid ratios ranging from 0.7 to 50. Although the waste pass...

  11. Study on Performance and Processability of Sirofil Lightweight Worsted Fabric

    Institute of Scientific and Technical Information of China (English)

    李明菊; 范德炘; 葛惠萍; 侯祖龄

    2001-01-01

    The lightweight worsted fabric made of Sirofil yarn was developed and its textile performance was studied. By means of conventional testing, KES and FAST, it is concluded that with the coordination of proper fabric design and processing technique, the performance of this innovative fabric is superior to that of the conventional lightweight fabric Furthermore, it is predicted from the relevant parameters that its processability in the following suit manufacture is very desirable.

  12. A comparative study of face processing using scrambled faces

    OpenAIRE

    Taubert, Jessica; Aagten-Murphy, David; Parr, Lisa A.

    2012-01-01

    It is a widespread assumption that all primate species process faces in the same way because the species are closely related and they engage in similar social interactions. However, this approach ignores potentially interesting and informative differences that may exist between species. This paper describes a comparative study of holistic face processing. Twelve subjects (six chimpanzees Pan troglodytes and six rhesus monkeys Macaca mulatta) were trained to discriminate whole faces (faces wit...

  13. Current methods for studying dynamic processes in the ionosphere

    Science.gov (United States)

    Filipp, Nikolai D.; Blaunshtein, Natan Sh.; Erukhimov, Lev M.; Ivanov, Vladimir A.; Uriadov, Valerii P.

    Current experimental and theoretical data relevant to the study of dynamic processes in the ionospheric plasma using state-of-the-art methods are summarized. The methods used include linear FM sounding, partial radio wave reflection, oblique-incidence radio wave scattering, radio wave heating of the ionosphere, plasma injection, and computer simulation of physical processes. For each specific method, experimental data are compared against theoretical predictions and numerical calculations.

  14. Mathematical modeling of DNA's transcription process for the cancer study

    Science.gov (United States)

    Morales-Peñaloza, A.; Meza-López, C. D.; Godina-Nava, J. J.

    2012-10-01

    The cancer is a phenomenon caused by an anomaly in the DNA's transcription process, therefore it is necessary to known how such anomaly is generated in order to implement alternative therapies to combat it. We propose to use mathematical modeling to treat the problem. Is implemented a simulation of the process of transcription and are studied the transport properties in the heterogeneous case using nonlinear dynamics.

  15. Process management in healthcare.Sant Camil Hospital case study

    OpenAIRE

    Sánchez Ruiz, Lidia; Blanco Rojo, Beatriz; Simón, Rosa María

    2013-01-01

    Nowadays due to the crisis, some government measures are aimed at reducing healthcare spending, affecting in some level or another the quality offered. Process management is said to be a useful tool for reducing healthcare costs by improving management without any additional economic investment. That is doing more with the same resources and without reducing the quality offered. In this study an empirical case of a Catalan hospital is presented. Overall, the usefulness of process managemen...

  16. A COMPUTERIZED TOMOGRAPHIC STUDY OF UNCINATE PROCESS OF ETHMOID BONE

    Directory of Open Access Journals (Sweden)

    N. Vinay Kumar

    2015-03-01

    Full Text Available Background: The uncinate process is an important landmark in the anatomy of osteo-meatal complex of frontal recess which also plays a vital role in the ventilation of middle meatus and sinuses. Its superior attachment shows great anatomic variability. The aim of this study was to observe and classify superior attachment and presence of pneumatisation in uncinate process. Materials and methods: Computed tomographic images of paranasal region from 100 patients were studied retrospectively. In 100 patients, 54 belonged to male and 46 female and were in the age group of 11 to 75 years with an average of 32.7 years. The superior attachment of uncinate process was observed and tabulated according to Landsberg and Friedman classification and pneumatisation of uncinate process was also noted. The results were analysed statistically. Results: The superior attachment of uncinate process was observed in 200 sides out of 100 patients and its attachment to the agger nasi cells (type - 2 was found in 36% while its attachment to lamina papyracea (type – 1 and to middle turbinate (type – 6 were found in 19% and 20% respectively. Uncinate process ending at the junction of middle turbinate with cribriform plate (type – 4, at the ethmoid skull base (type – 5, bifurcating towards lamina papyracea and junction of middle turbinate with cribriform plate (type – 3 were seen in 2%, 8% and 5% respectively. In 11%, the superior end showed no attachment to surrounding structures. The uncinate process was pneumatised in 34 of 200 sides (17%, among which 45.5% was unilateral and 54.5% bilateral. Conclusion: Preoperatively evaluating variations of uncinate process and its pneumatisation helps to avoid intraoperative damage to surrounding structures. The detailed knowledge of extent of uncinate process may also help to deduce the reason for refractory chronic sinusitis.

  17. A study of palm biomass processing strategy in Sarawak

    Science.gov (United States)

    Lee, S. J. Y.; Ng, W. P. Q.; Law, K. H.

    2017-06-01

    In the past decades, palm industry is booming due to its profitable nature. An environmental concern regarding on the palm industry is the enormous amount of waste produced from palm industry. The waste produced or palm biomass is one significant renewable energy source and raw material for value-added products like fiber mats, activated carbon, dried fiber, bio-fertilizer and et cetera in Malaysia. There is a need to establish the palm biomass industry for the recovery of palm biomass for efficient utilization and waste reduction. The development of the industry is strongly depending on the two reasons, the availability and supply consistency of palm biomass as well as the availability of palm biomass processing facilities. In Malaysia, the development of palm biomass industry is lagging due to the lack of mature commercial technology and difficult logistic planning as a result of scattered locality of palm oil mill, where palm biomass is generated. Two main studies have been carried out in this research work: i) industrial study of the feasibility of decentralized and centralized palm biomass processing in Sarawak and ii) development of a systematic and optimized palm biomass processing planning for the development of palm biomass industry in Sarawak, Malaysia. Mathematical optimization technique is used in this work to model the above case scenario for biomass processing to achieve maximum economic potential and resource feasibility. An industrial study of palm biomass processing strategy in Sarawak has been carried out to evaluate the optimality of centralized processing and decentralize processing of the local biomass industry. An optimal biomass processing strategy is achieved.

  18. [The teaching-learning process in ICU: a phenomenological study].

    Science.gov (United States)

    Guedes, Glauteice Freitas; Ohara, Conceição Vieira da Silva; Silva, Gilberto Tadeu Reis da

    2008-01-01

    This study aimed to understanding the meaning attributed by teaching staff throughout the traineeship from nursing under graduation course in intensive care on the teaching and learning process. It's a study of phenomenological qualitative approach. The data were obtained through the following guiding question: 'How do you live the teaching-learning process at the ICU traineeship?'. From the subjects' descriptions, four open categories came up: 'An awakening to ICU', 'A searching for how to teaching Nursing in Intensive Care', 'A connection between the teaching staff and the students' and 'A meaningful experience'. This study showed that this living experience, which is shared, permits an approaching and the meeting of the teaching staff with the students in this setting, facilitating the teaching-learning process.

  19. Selection process for trade study: Graphite Composite Primary Structure (GCPS)

    Science.gov (United States)

    Greenberg, H. S.

    1994-01-01

    This TA 2 document describes the selection process that will be used to identify the most suitable structural configuration for an SSTO winged vehicle capable of delivering 25,000 lbs to a 220 nm circular orbit at 51.6 degree inclination. The most suitable unpressurized graphite composite structures and material selections is within this configuration and will be the prototype design for subsequent design and analysis and the basis for the design and fabrication of payload bay, wing, and thrust structure full scale test articles representing segments of the prototype structures. The selection process for this TA 2 trade study is the same as that for the TA 1 trade study. As the trade study progresses additional insight may result in modifications to the selection criteria within this process. Such modifications will result in an update of this document as appropriate.

  20. Indonesian EFL Students’ Perspective on Writing Process: A Pilot Study

    OpenAIRE

    Imelda Hermilinda Abas; Noor Hashima Abd. Aziz

    2016-01-01

    The study was aimed at understanding the EFL Indonesian students’ perspective on the writing process. The pilot study involved two male Indonesian postgraduate students in Universiti Utara Malaysia. The Indonesian students were selected based on the following criteria: (1) had enough knowledge in English writing, indicated by the completion of Academic Writing and Research Methodology courses taken in UUM; (2) had written an unpublished thesis during their undergraduate studies in Indonesia a...

  1. An experimental and numerical study of water jet cleaning process

    CERN Document Server

    Guha, Anirban; Balachandar, Ram

    2010-01-01

    In this paper, we have experimentally, numerically and theoretically investigated the water jet cleaning process. Very high speed water jets (~80-200 m/s) are used in such cleaning operations. These jets diffuse in the surrounding atmosphere by the process of air entrainment and this contributes to the spreading of the jet and subsequent decay of pressure. Estimation of this pressure decay and subsequent placement of the cleaning object is of paramount importance in manufacturing and material processing industries. Also, the pressure distribution on the cleaning surface needs to be assessed in order to understand and optimize the material removal process. Experimental study is performed to understand the pressure characteristics. A Semi-empirical model for capturing the air entrainment has been added to the commercial CFD package FLUENT. The simulation results are validated against ours as well as previous experimental findings. The numerical results have shown that the optimal stand-off distance in cleaning ...

  2. A study of the process of desorption of hexavalent chromium

    Directory of Open Access Journals (Sweden)

    W.B. Amorim

    2003-09-01

    Full Text Available In this work the process of desorption of hexavalent chromium, a toxic metal ion, from the marine algae Sargassum sp, following biosorption experiments 2³ factorial design was studied. A technique was applied to three eluents: HCl, H2SO4 and EDTA. Three factors of importance were evaluated: concentration of eluent, the ratio between mass of biosorbent and volume of eluent (S/L and process time. A statistical analysis of the experimental results showed that the three variables evaluated are significant for all three eluents. The models for chromium desorption were validated, as the results agreed well with the observed values. Through use of the response surface methodology, a factorial design based optimization technique; it was possible to identify the most suitable eluent and the interval of values for the process variables that resulted in the most significant desorption of chromium, which is relevant information for work aiming at process optimization.

  3. Applying Business Process Mode ling Techniques : Case Study

    Directory of Open Access Journals (Sweden)

    Bartosz Marcinkowski

    2010-12-01

    Full Text Available Selection and proper application of business process modeling methods and techniques have a significant impact on organizational improvement capabilities as well as proper understanding of functionality of information systems that shall support activity of the organization. A number of business process modeling notations were implemented in practice in recent decades. Most significant of the notations include ARIS, Business Process Modeling Notation (OMG BPMN and several Unified Modeling Language (OMG UML extensions. In this paper, the assessment whether one of the most flexible and strictly standardized contempo-rary bus iness process modeling notations, i.e. Rational UML Profile for Business Modeling, enable business analysts to prepare business models that are all-embracing and understandable by all the stakeholders. After the introduction, me-thodology of res earch is discussed. The following section presents selected case study results. The paper is concluded with a summary

  4. STUDY OF ELECTROPOLIMERIZATION PROCESSES OF PYRROLE BY CYCLIC VOLTAMMETRIC TECHNIQUE

    Directory of Open Access Journals (Sweden)

    Adhitasari Suratman

    2010-06-01

    Full Text Available Electropolymerization processes and electrochemical properties of polypyrrole as electroactive polymer have been studied by cyclic voltammetric technique. Pyrrole was electropolymerized to form polypyrrole in water-based solvent containing sodium perchlorate as supporting electrolyte in several pH values. The pH of the solutions were varied by using Britton Robinson buffer. The results showed that oxidation potential limit of electropolymerization processes of pyrrole was 1220 mV vs Ag/AgCl reference electrode. It can be seen that cyclic voltammetric respon of polypyrrole membrane that was prepared by electropolymerization processes of pyrrole at the scanning rate of 100 mV/s was stable. While the processes of pyrrole electropolymerization carried out at the variation of pH showed that the best condition was at the pH range of 2 - 6.   Keywords: polypyrolle, electropolymer, voltammetric technique

  5. Corrosion study in the chemical air separation (MOLTOX trademark ) process

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Doohee; Wong, Kai P.; Archer, R.A.; Cassano, A.A.

    1988-12-01

    This report presents the results of studies aimed at solving the corrosion problems encountered during operation of the MOLTOX{trademark} pilot plant. These studies concentrated on the screening of commercial and developmental alloys under conditions simulating operation conditions in this high temperature molten salt process. Process economic studies were preformed in parallel with the laboratory testing to ensure that an economically feasible solution would be achieved. In addition to the above DOE co-funded studies, Air Products and Chemicals pursued proprietary studies aimed at developing a less corrosive salt mixture which would potentially allow the use of chemurgically available alloys such as stainless steels throughout the system. These studies will not be reported here; however, the results of corrosion tests in the new less corrosive salt mixtures are reported. Because our own studies on salt chemistry impacts heavily on the overall process and thereby has an influence on the experimental work conducted under this contract, some of the studies discussed here were impacted by our own proprietary data. Therefore, the reasons behind some of the experiments presented herein will not be explained because that information is proprietary to Air Products. 14 refs., 42 figs., 21 tabs.

  6. Numerical Study of Single Well Vapor Extraction Process

    Directory of Open Access Journals (Sweden)

    Milad Rahnema

    2016-01-01

    Full Text Available Vapor extraction (Vapex is an emerging technology to produce heavy oil and bitumen from subsurface formations. Single well (SW Vapex technique uses the same concept of Vapex process but only with one horizontal well. In this process solvent is injected from the toe of the horizontal well with oil production at the heel section. The main advantage of SW-Vapex process lies in the economic saving and applicability in problematic reservoirs, where drilling of two horizontal wells is impractical. The performance of SW-Vapex seems to be comparable with dual horizontal Vapex process using proper optimization schemes. This study is grouped into two sections: (i a screening study of early time operating performance of SW-Vapex and (ii a sensitivity analysis of the effect of the reservoir and well completion parameters. Simulation results show that solvent injection rate can be optimized to improve oil production rate. Higher injection rates may not necessarily lead to increase in production. This study confirms that SW-Vapex process is very ineffective in reservoirs with high oil viscosity (more than 1,500 cp and thin formations (less than 10 m.

  7. Experimental studies of some moderately fast processes initiated by radiation

    Science.gov (United States)

    Butler, J.; Hodgson, B. W.; M. Hoey, Brigid; Land, E. J.; Lea, J. S.; Lindley, Elizabeth J.; Rushton, F. A. P.; Swallow, A. J.

    Numerous improvements have been made to the Paterson Institute linear accelerator since its installation in 1967. New light sources, improved light guidance, smaller cells and a wider range of photo-detecting devices are now in routine use. Data are collected and processed by a computer-based method which has replaced the original oscilloscope-based system. Processes taking place over more than a few seconds can be studied with an arrangement combining pulse radiolysis with an ordinary spectrophotometer and arrangements for "single-shot" studies of faster processes are now being designed. Detection methods are also available which do not rely on transmission of light, and transient changes in conductivity can be measured. Among the systems which have been extensively studied are the Fricke dosimeter, in which measured overall yields can now be quantitatively correlated with the rate constants of 34 individual reactions taking place. Studies have also been conducted with peptides and proteins in which electrochemically-driven charge transfers have been demonstrated between methionine, tryptophan, tyrosine and cysteine/cystine units. Free radical reactions in Mitomycin C have been elucidated which are consistent with pulse radiolysis observations and the formation of radiolytic products as determined by HPLC. Adriamycin reduction has also been studied: the Adriamycin semiquinone is unusually stable with respect to dismutation but its lifetime is limited by a decomposition process in which daunosamine is expelled. The expulsion is followed by a further rearrangement. Many of the reactions investigated require tens or hundreds of seconds to reach essential completion.

  8. THE STUDY ON MECHANISM OF BINDER MIGRATION DURING COATING PROCESS

    Institute of Scientific and Technical Information of China (English)

    Yun Liang; Kefu Chen

    2004-01-01

    Binder migration during coating process and the mechanism of binder migration were studied in this paper. After the latex was tagged by osmium, the degree of binder migration was measured by energy-dispersive X-ray spectrometer. For the wet sample just after coating application, the real information of binder distribution was kept by quenching the sample in liquid nitrogen followed by freeze-drying. The results showed: under the condition of this research, binder migration occurred both in the process of coating application and drying.But the amount of binder migration occurred during coating application was much little than that occurred during drying. The mechanism of binder migration during the process of coating application was studied by force analyses. And one viewpoint was proposed that was binder migration was caused by Magnus force and Saffman force.

  9. Process property studies of melt blown thermoplastic polyurethane polymers

    Science.gov (United States)

    Lee, Youn Eung

    The primary goal of this research was to determine optimum processing conditions to produce commercially acceptable melt blown (MB) thermoplastic polyurethane (TPU) webs. The 6-inch MB line and the 20-inch wide Accurate Products MB pilot line at the Textiles and Nonwovens Development Center (TANDEC), The University of Tennessee, Knoxville, were utilized for this study. The MB TPU trials were performed in four different phases: Phase 1 focused on the envelope of the MB operating conditions for different TPU polymers; Phase 2 focused on the production of commercially acceptable MB TPU webs; Phase 3 focused on the optimization of the processing conditions of MB TPU webs, and the determination of the significant relationships between processing parameters and web properties utilizing statistical analyses; Based on the first three phases, a more extensive study of fiber and web formation in the MB TPU process was made and a multi liner regression model for the MB TPU process versus properties was also developed in Phase 4. In conclusion, the basic MB process was fundamentally valid for the MB TPU process; however, the MB process was more complicated for TPU than PP, because web structures and properties of MB TPUs are very sensitive to MB process conditions: Furthermore, different TPU grades responded very differently to MB processing and exhibited different web structure and properties. In Phase 3 and Phase 4, small fiber diameters of less than 5mum were produced from TPU237, TPU245 and TPU280 pellets, and the mechanical strengths of MB TPU webs including the tensile strength, tear strength, abrasion resistance and tensile elongation were notably good. In addition, the statistical model showed useful interaction regarding trends for processing parameters versus properties of MB TPU webs. Die and air temperature showed multicollinearity problems and fiber diameter was notably affected by air flow rate, throughput and die/air temperature. It was also shown that most of

  10. Personality Traits and Critical Thinking Skills in College Students: Empirical Tests of a Two-Factor Theory

    Science.gov (United States)

    Clifford, Jennifer S.; Boufal, Magdalen M.; Kurtz, John E.

    2004-01-01

    The two-factor theory defines critical thinking skills as a combined effect of cognitive abilities and personality dispositions. Although the available research supports the association between critical thinking and measures of cognitive ability, the specific traits contained in the dispositional factor have not been clearly identified through…

  11. Locus of Learning and Affective Strategy Use: Two Factors Affecting Success in Self-Instructed Language Learning

    Science.gov (United States)

    Bown, Jennifer

    2006-01-01

    As distance learning and other nontraditional methods of language learning become more popular, it is important to understand the factors that influence learners' ability to succeed in such environments. This paper reports on two factors that have a significant impact on the student experience in a self-instructed language program: locus of…

  12. Improving Group Processes in Transdisciplinary Case Studies for Sustainability Learning

    Science.gov (United States)

    Hansmann, Ralf; Crott, Helmut W.; Mieg, Harald A.; Scholz, Roland W.

    2009-01-01

    Purpose: Deficient group processes such as conformity pressure can lead to inadequate group decisions with negative social, economic, or environmental consequences. The study aims to investigate how a group technique (called INFO) improves students' handling of conformity pressure and their collective judgments in the context of a…

  13. Study of respiratory processes in clinical antibiotic resistant staphylococci strains

    Directory of Open Access Journals (Sweden)

    S. I. Paranko

    2006-01-01

    Full Text Available 54 staphylococcus strains with different resistance levels to a number of antibiotics have been extracted from the reproductive canal of women who had a miscarriage. The respiration activity of the selected cultures has been studied. Endogenic respiration processes in staphylococcus cells intensified in consequence of the development of antimicrobial medication resistance.

  14. Study of respiratory processes in clinical antibiotic resistant staphylococci strains

    OpenAIRE

    S. I. Paranko; V. G. Gavrilyuk; A. I. Vinnikov

    2006-01-01

    54 staphylococcus strains with different resistance levels to a number of antibiotics have been extracted from the reproductive canal of women who had a miscarriage. The respiration activity of the selected cultures has been studied. Endogenic respiration processes in staphylococcus cells intensified in consequence of the development of antimicrobial medication resistance.

  15. Study on the process of Fe (III) oxide fluorination

    Science.gov (United States)

    Sophronov, V. L.; Kalaev, M. E.; Makaseev, Yu N.; Sachkov, V. I.; Verkhoturova, V. V.

    2016-02-01

    The article deals with a fundamentally new fluoride technology for obtaining fluoride materials, provides data on the kinetics of the process of fluorination of Fe oxide with fluorine, fluoride and ammonium bifluoride. The physical and chemical properties of obtained fluorides are shown: a study of the elemental composition, grain-size composition using the method of scanning electron microscopy and laser diffraction.

  16. Factors Causing Demotivation in EFL Teaching Process: A Case Study

    Science.gov (United States)

    Aydin, Selami

    2012-01-01

    Studies have mainly focused on strategies to motivate teachers or the student-teacher motivation relationships rather than teacher demotivation in the English as a foreign language (EFL) teaching process, whereas no data have been found on the factors that cause teacher demotivation in the Turkish EFL teaching contexts at the elementary education…

  17. Natural Language Processing in Game Studies Research: An Overview

    Science.gov (United States)

    Zagal, Jose P.; Tomuro, Noriko; Shepitsen, Andriy

    2012-01-01

    Natural language processing (NLP) is a field of computer science and linguistics devoted to creating computer systems that use human (natural) language as input and/or output. The authors propose that NLP can also be used for game studies research. In this article, the authors provide an overview of NLP and describe some research possibilities…

  18. Hadoop for EEG Storage and Processing: A Feasibility Study

    NARCIS (Netherlands)

    Berrada, Ghita; Keulen, van Maurice; Habib, Mena B.; Slezak, Dominik; Tan, Ah-Hwee; Peters, James F.; Schwabe, Lars

    2014-01-01

    Lots of heterogeneous complex data are collected for diagnosis purposes. Such data should be shared between all caregivers and, often at least partly automatically processed, due to its complexity, for its full potential to be harnessed. This paper is a feasibility study that assesses the potential

  19. Hadoop for EEG Storage and Processing: A Feasibility Study

    NARCIS (Netherlands)

    Berrada, Ghita; van Keulen, Maurice; Habib, Mena Badieh; Slezak, Dominik; Tan, Ah-Hwee; Peters, James F.; Schwabe, Lars

    2014-01-01

    Lots of heterogeneous complex data are collected for diagnosis purposes. Such data should be shared between all caregivers and, often at least partly automatically processed, due to its complexity, for its full potential to be harnessed. This paper is a feasibility study that assesses the potential

  20. A Collaborative Problem-Solving Process through Environmental Field Studies

    Science.gov (United States)

    Kim, Mijung; Tan, Hoe Teck

    2013-01-01

    This study explored and documented students' responses to opportunities for collective knowledge building and collaboration in a problem-solving process within complex environmental challenges and pressing issues with various dimensions of knowledge and skills. Middle-school students ("n" =?16; age 14) and high-school students…

  1. Building Inclusive Processes for School Improvement: A Case Study

    Science.gov (United States)

    Arnaiz, Pilar; Escarbajal, Andrés; Guirao, José Manuel; Martínez, Rogelio

    2016-01-01

    This paper presents a study carried out in a nursery and primary school in order to ascertain the level of self-assessment undertaken by teachers with respect to their educational processes using the "ACADI" instrument, "School-based self-assessment of diversity awareness from an inclusive approach." The objective was to…

  2. Digital Image Processing application to spray and flammability studies

    Science.gov (United States)

    Hernan, M. A.; Parikh, P.; Sarohia, V.

    1985-01-01

    Digital Image Processing has been integrated into a new technique for measurements of fuel spray characteristics. The advantages of this technique are: a wide dynamic range of droplet sizes, accounting for nonspherical droplet shapes not possible with other spray assessment techniques. Finally, the technique has been applied to the study of turbojet engine fuel nozzle atomization performance with Jet A and antimisting fuel.

  3. Injury and time studies of working processes in fishing

    DEFF Research Database (Denmark)

    Jensen, Olaf Chresten

    2006-01-01

    Epidemiological studies of occupational injury document the incidence rates of the main structures as type of workplace and the work departments. The work processes within the departments represent an internal structure where the injury rates have not been given much attention before. The purpose...

  4. Study on the Competitiveness of the Romanian Meat Processing Industry

    Directory of Open Access Journals (Sweden)

    Silvius Stanciu

    2015-11-01

    Full Text Available Meat processing represents a strategic sector that can significantly contribute to local food industry competitiveness and national food security. The generous natural resources available to Romania and the tradition in animal husbandry can provide adequate raw materials for the processing industry in order to cover domestic consumption needs and obtain substantial revenues by export. Currently, Romanian meat market is dependent on the imports of meat, as carcasses or processed products. There have been mainly live animals or semi-finished products which are exported, fact which led to an imbalance of trade and to low revenues for the domestic meat industry. This article proposes an analysis of the local meat processing industry in terms of production, consumption and trade transactions, assessed in the international context of the meat market. The study indicates that in the last few years, Romania has recorded significant progress in the meat processing and production domain; nevertheless, the financial performance of the local companies is inferior to that of the EU companies. Except the poultry meat and mutton sectors, in which the export value exceeds imports, the other sectors show a deficit, the domestic demand not being covered. The low concentration degree of the companies from the meat processing industry show a continued market fragmentation and a growth potential for the existing companies.

  5. [Study on preparation process of artesunate polylactic acid microspheres].

    Science.gov (United States)

    Pan, Xu-Wang; Wang, Wei; Fang, Hong-Ying; Wang, Fu-Gen; Cai, Zhao-Bin

    2013-12-01

    This study aims to investigate the preparation process and in vitro release behavior of artesunate polylactic acid microspheres, in order to prepare an artesunate polylactic acid (PLA) administration method suitable for hepatic arterial embolization. With PLA as the material and polyvinyl alcohol (PVA) as the emulsifier, O/W emulsion/solvent evaporation method was adopted to prepare artesunate polylactic acid microspheres, and optimize the preparation process. With drug loading capacity, encapsulation efficiency and particle size as indexes, a single factor analysis was made on PLA concentration, PVA concentration, drug loading ratio and stirring velocity. Through an orthogonal experiment, the optimal processing conditions were determined as follows: PLA concentration was 9. 0% , PVA concentration was 0. 9% , drug loading ratio was 1:2 and stirring velocity was 1 000 r x min(-1). According to the verification of the optimal process, microsphere size, drug loading and entrapment rate of artesunate polylactic acid microspheres were (101.7 +/- 0.37) microm, (30.8 +/- 0.84)%, (53.6 +/- 0.62)%, respectively. The results showed that the optimal process was so reasonable and stable that it could lay foundation for further studies.

  6. WORD PROCESSING AND SECOND LANGUAGE WRITING: A LONGITUDINAL CASE STUDY

    Directory of Open Access Journals (Sweden)

    Alister Cumming

    2001-12-01

    Full Text Available The purpose of this study was to determine whether word processing might change a second language (L2 leamer's writing processes and improve the quality of his essays over a relatively long period of time. We worked from the assumption that research comparing word-processing to pen and paper composing tends to show positive results when studies include lengthy terms of data collection and when appropriate instruction and training are provided. We compared the processes and products of L2 composing displayed by a 29-year-old, male Mandarin leamer of English with intermediate proficiency in English while he wrote, over 8 months, 14 compositions grouped into 7 comparable pairs of topics altemating between uses of a lap-top computer and of pen and paper. Al1 keystrokes were recorded electronically in the computer environrnent; visual records of al1 text changes were made for the pen-and paper writing. Think-aloud protocols were recorded in al1 sessions. Analyses indicate advantages for the word-processing medium over the pen-and-paper medium in terms ofi a greater frequency of revisions made at the discourse level and at the syntactical level; higher scores for content on analytic ratings of the completed compositions; and more extensive evaluation ofwritten texts in think-aloud verbal reports.

  7. Auditing of Innovation Process: a case study in Inmetro

    Directory of Open Access Journals (Sweden)

    Vanessa Lage Bellazzi de Pellegrini

    2014-04-01

    Full Text Available The main objective of the research was to describe the contribution of the audit for the INMETRO innovation process. The intermediate objectives sought to characterize the innovation process INMETRO; identify the procedures and instruments used by the institute in the auditing of the innovation process, and describe the influence of the auditing in the development of two innovations by INMETRO. As a secondary objective the INMETRO innovation process was evaluated by using the evaluation model of Tidd, Bessant & Pavitt (2008.The research method was a single case study with a descriptive purpose. Semistructured interviews with eight employees working with audit and control as well as narratives of two innovations by employees who closely followed the development of innovations were used for data collection. The collected data were treated by means of content analysis. The survey results indicated that neither the innovation process nor the process innovation audit is institutionalized in INMETRO. This makes each main unit of the institute develop innovations according to a viewpoint itself. The absence of reports of audit processes of innovation management with suggestions for improvements in the processes of innovation, and the few references to issues related to audit on the accounts obtained during narratives of development of the innovations surveyed show that the influence of management innovation audit is still small in INMETRO. This is compounded by the fact that management innovation audit is still in its infancy. Paradoxically the legitimate concern of the Institute with normalization may be harming the correct understanding of what would be the appropriate procedures and instruments to an innovation audit. While not referring directly to the question innovation, often appear reports of respondents complaining of excessive standards.

  8. Process: A Case Study of Development and Re-engineering of an Absence and Leave Management Process

    OpenAIRE

    Nyström, Malena

    2016-01-01

    The purpose of this thesis was to develop, re-engineer and improve the case company’s Absence and Leave Management Process by applying business process improvement and business process re-engineering and design methodologies. The data for the theoretical study was collected through relevant literature for the topic. The main focus was business process improvement and business process re-engineering of administrational processes. The empirical study was based on the case company’s existin...

  9. A case study on point process modelling in disease mapping

    DEFF Research Database (Denmark)

    Møller, Jesper; Waagepetersen, Rasmus Plenge; Benes, Viktor

    2005-01-01

    We consider a data set of locations where people in Central Bohemia have been infected by tick-borne encephalitis (TBE), and where population census data and covariates concerning vegetation and altitude are available. The aims are to estimate the risk map of the disease and to study the dependence...... of the risk on the covariates. Instead of using the common areal level approaches we base the analysis on a Bayesian approach for a log Gaussian Cox point process with covariates. Posterior characteristics for a discretized version of the log Gaussian Cox process are computed using Markov chain Monte Carlo...

  10. Study of Aerospace Materials, Coatings, Adhesions and Processes. Aircraft Icing Processes. Volume 1.

    Science.gov (United States)

    1984-09-14

    AP A160 413 STUDY OF AEROSPACE MATERIALS CATIS AD|SIOS A - PROCESSES AIRCRAFT IC.. (UI INSTITUbO NACIONAL DE TECNICA AEROESPACIAL MORID ISPAIN) E I...Approved for public release; distribution unlimited. Prepared for INSTITTTTO NACIONAL DE TECNICA AEROESPACIAL "Esteban Terradas". Torrejdn de Ardoz...ADDRESS il0. PROGRAM ELEMENT. PROJECT, TASKC Thstituto Naciorial Tecnica Aeroespacial Dto. Aerodindmica y Navegabilidad 2301 / D1 Torrejcn de Ardoz

  11. Face processing biases in social anxiety: an electrophysiological study.

    Science.gov (United States)

    Moser, Jason S; Huppert, Jonathan D; Duval, Elizabeth; Simons, Robert F

    2008-04-01

    Studies of information processing biases in social anxiety suggest abnormal processing of negative and positive social stimuli. To further investigate these biases, behavioral performance and event-related brain potentials (ERPs) were measured, while high- and low-socially anxious individuals performed a modified version of the Erikson flanker task comprised of negative and positive facial expressions. While no group differences emerged on behavioral measures, ERP results revealed the presence of a negative face bias in socially anxious subjects as indexed by the parietally maximal attention- and memory-related P3/late positive potential. Additionally, non-anxious subjects evidenced the presence of a positive face bias as reflected in the centrally maximal early attention- and emotion-modulated P2 and the frontally maximal response monitoring-related correct response negativity. These results demonstrate the sensitivity of different processing stages to different biases in high- versus low-socially anxious individuals that may prove important in advancing models of anxious pathology.

  12. A study on the production processes of granulated iron

    Science.gov (United States)

    Nokhrina, O. I.; Rozhikhina, I. D.; Khodosov, I. E.

    2016-09-01

    The results of theoretical and experimental studies on the production process of high-quality granulated iron using hematite-magnetite iron ore and coal of different brands as a raw material are presented. According to the research the optimal coal consumption, temperature and time parameters of the metallization process, necessary for obtaining metallized materials with the specified composition and metallization degree, are defined. The conditions for the formation of metal granules with high content (over 98%) of primary iron are found. The process includes two stages: initially the solid-phase reduction of iron from oxides with production of metallized sponge material is carried out, further as the temperature increases the separation of slag and metal phases takes place.

  13. THE STUDY ON MECHANISM OF BINDER MIGRATION DURING COATING PROCESS

    Institute of Scientific and Technical Information of China (English)

    YunLiang; KefuChen

    2004-01-01

    Binder migration during coating process and themechanism of binder migration were studied in thispaper. After the latex was tagged by osmium, thedegree of binder migration was measured byenergy-dispersive X-ray spectrometer. For the wetsample just after coating application, the realinformation of binder distribution was kept byquenching the sample in liquid nitrogen followed byfreeze-drying. The results showed: under thecondition of this research, binder migration occurredboth in the process of coating application and drying.But the amount of binder migration occurred duringcoating application was much little than that occurredduring drying. The mechanism of binder migrationduring the process of coating application was studiedby force analyses. And one viewpoint was proposedthat was binder migration was caused by Magnusforce and Saffman force.

  14. STUDY ON GIS DATA DIRECTLY INTEGRATED INTO IMAGE PROCESSING

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The basic properties to be dealt with ,when considering initially the research needs related to the integration of remote sensing (RS) information into a geographic information system (GIS),are many-sided.The primary combination of remote sensing and GIS is mainly realized by the transforms of data structure .Because of its own limitations,there is an urgent need to investigate the integration of RS and GIS in higher levels.In this paper,we discuss the different types of combinations of RS with GIS,and propose that GIS data should be directly brought into image processing from the beginning.A tentative idea of how to use the method of granularity to study the common processing unit of RS and GIS is described.The example for the determination of granularity of spatial data processing related to run-length-code line is also given.

  15. Feasibility Studies on Underwater Laser Surface Hardening Process

    Directory of Open Access Journals (Sweden)

    Biao Jin

    2015-01-01

    Full Text Available Laser surface hardening process is a very promising hardening method for ferrous and nonferrous alloys where transformations occur during cooling after laser melting in the solid state. This study experimentally characterizes laser surface hardening of tool steel in both water and air. For the underwater operation, laser surface scanning is performed over the tool steel surface which is immersed in water. The laser surface hardening tests are performed with a maximum 200 W fiber laser with a Gaussian distribution of energy in the beam. For the surface hardening, single-track melting experiment which sequentially scans elongated path of single line has been performed. As the hardened depth depends on the thermal conductivity of the material, the surface temperature and the penetration depth may be varied by underwater laser processing. The feasibility of underwater laser surface hardening process is discussed on the basis of average hardness level and hardened bead shape.

  16. Capability studies, helpful tools in process quality improvement

    Directory of Open Access Journals (Sweden)

    Simion Carmen

    2017-01-01

    Full Text Available Ability of processes to meet customer’quality requirements has become essential for providing competitive advantages such as cost savings, reducing the number of nonconfoming products or increasing customer satisfaction. This paper aims to conduct a capability study for a swaging process (that ensures an assembly dimension of a key product characteristic (the outer diameter of a new part, related to the concept of capability and performance indices and how these metrics can be used and interpreted to become powerful tools for decision making. To achieve the goal of the paper, the following key aspects were analyzed: capability of the measurement system capability (gage R&R, production equipment (machine capability and process capability/performance during the first serial production. The analysis was performed with Minitab® 17, the most commonly used software for quality improvement.

  17. Selected studies in HTGR reprocessing development. [KA2C process

    Energy Technology Data Exchange (ETDEWEB)

    Notz, K.J.

    1976-03-01

    Recent work at ORNL on hot cell studies, off-gas cleanup, and waste handling is reviewed. The work includes small-scale burning tests with irradiated fuels to study fission product release, development of the KALC process for the removal of /sup 85/Kr from a CO/sub 2/ stream, preliminary work on a nonfluidized bed burner, solvent extraction studies including computer modeling, characterization of reprocessing wastes, and initiation of a development program for the fixation of /sup 14/C as CaCO/sub 3/. (auth)

  18. Fuzzy-based HAZOP study for process industry

    Energy Technology Data Exchange (ETDEWEB)

    Ahn, Junkeon; Chang, Daejun, E-mail: djchang@kaist.edu

    2016-11-05

    Highlights: • HAZOP is the important technique to evaluate system safety and its risks while process operations. • Fuzzy theory can handle the inherent uncertainties of process systems for the HAZOP. • Fuzzy-based HAZOP considers the aleatory and epistemic uncertainties and provides the risk level with less uncertainty. • Risk acceptance criteria should be considered regarding the transition region for each risk. - Abstract: This study proposed a fuzzy-based HAZOP for analyzing process hazards. Fuzzy theory was used to express uncertain states. This theory was found to be a useful approach to overcome the inherent uncertainty in HAZOP analyses. Fuzzy logic sharply contrasted with classical logic and provided diverse risk values according to its membership degree. Appropriate process parameters and guidewords were selected to describe the frequency and consequence of an accident. Fuzzy modeling calculated risks based on the relationship between the variables of an accident. The modeling was based on the mean expected value, trapezoidal fuzzy number, IF-THEN rules, and the center of gravity method. A cryogenic LNG (liquefied natural gas) testing facility was the objective process for the fuzzy-based and conventional HAZOPs. The most significant index is the frequency to determine risks. The comparison results showed that the fuzzy-based HAZOP provides better sophisticated risks than the conventional HAZOP. The fuzzy risk matrix presents the significance of risks, negligible risks, and necessity of risk reduction.

  19. Study on the ignition process of a segmented plasma torch

    Science.gov (United States)

    Cao, Xiuquan; Yu, Deping; Xiang, Yong; Li, Chao; Jiang, Hui; Yao, Jin

    2017-07-01

    Direct current plasma torches have been applied to generate unique sources of thermal energy in many industrial applications. Nevertheless, the successful ignition of a plasma torch is the key process to generate the unique source (plasma jet). However, there has been little study on the underlying mechanism of this key process. A thorough understanding of the ignition process of a plasma torch will be helpful for optimizing the design of the plasma torch structure and selection of the ignition parameters to prolong the service life of the ignition module. Thus, in this paper, the ignition process of a segmented plasma torch (SPT) is theoretically and experimentally modeled and analyzed. Corresponding electrical models of different stages of the ignition process are set up and used to derive the electrical parameters, e.g. the variations of the arc voltage and arc current between the cathode and anode. In addition, the experiments with different ignition parameters on a home-made SPT have been conducted. At the same time, the variations of the arc voltage and arc current have been measured, and used to verify the ones derived in theory and to determine the optimal ignition parameters for a particular SPT.

  20. Experiment Study on Castex Process of AS Wire

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    In order to optimize the Castex process of AS wire, the systematic experiments have been done for different process parameters with self-made DZJ-II 350 Castex machine. The parameters, such as casting temperature of aluminum, flow of cooling water, extrusion ratio and the gap between the surface of wheel and that of the mould, have been mainly studied. The results show that with the increase of casting temperature or rotating speed of wheel the measured length of liquid metal zone increases too. However, the length of liquid metal zone decreases with the increase of the flow of cooling water. Moreover, the relationship between the extrusion ratio and the extrusion power is studied.

  1. Current Conceptual Challenges in the Study of Rhythm Processing Deficits

    Directory of Open Access Journals (Sweden)

    Pauline eTranchant

    2015-06-01

    Full Text Available Interest in the study of rhythm processing deficits (RPD is currently growing in the cognitive neuroscience community, as this type of investigation constitutes a powerful tool for the understanding of normal rhythm processing. Because this field is in its infancy, it still lacks a common conceptual vocabulary to facilitate effective communication between different researchers and research groups. In this commentary, we provide a brief review of recent reports of RPD through the lens of one important empirical issue: the method by which beat perception is measured, and the consequences of method selection for the researcher’s ability to specify which mechanisms are impaired in RPD. This critical reading advocates for the importance of matching measurement tools to the putative neurocognitive mechanisms under study, and reveals the need for effective and specific assessments of the different aspects of rhythm perception and synchronization.

  2. A study of correlation technique on pyramid processed images

    Indian Academy of Sciences (India)

    M Sankar Kishore; K Veerabhadra Rao

    2000-02-01

    The pyramid algorithm is potentially a powerful tool for advanced television image processing and for pattern recognition. An attempt is made to design and develop both hardware and software for a system which performs decomposition and reconstruction of digitized images by implementing the Burt pyramid algorithm. In this work, an attempt is also made to study correlation performance on reconstructed images. That is, the reference image is taken from the original image and correlation is performed on expanded images of the same size. Similarly, correlation performance study is carried out on different pyramid- processed levels. In this paper results are presented in terms of RMS error between original and expanded images. Only still images are considered, and the hardware is designed around an i486 processor and software is developed in PL/M 86.

  3. Effective Factors in Job Motivation of Faculty Members of Shaheed Beheshti University of Medical Sciences Based on Herzberg's Two-Factor Theory of Motivation in 1394

    Directory of Open Access Journals (Sweden)

    Somaie Ziar

    2017-06-01

    Full Text Available Background and objective: The most important factor for success in every organization, s its human resources. Human resources with the power of creativity, imagination, faith and commitment, have a great impact on the performance of the organization. University faculty members are the main pillars of human resources and affect the development of universities to promote academic standing in their communities. In this regard, the role of job motivation of faculty members to further efficiency helps universities. Materials and Methods: To determine the effective factors in job motivation of Shaheed Beheshti University of Medical Sciences’ faculty members, we conducted the study based on Herzberg's two factor motivation theory. In this across-sectional study, a sample of 137, (10% of the population in 12 faculties were selected by random and proportional sampling based on size and gender of faculty members. The instrument used was a questionnaire containing 40 of the 11 areas of external factors and an effective two-factor theory of Herzberg's motivation-based job. The reliability of the questionnaire was calculated using Cronbach's alpha (%86. After collecting data gamma and correlation multipliers Ki-test and logistic regression analysis was carried was with software SPSS16. Results: The internal factors were more important than external factors. Internal factors were more important in younger people. External factors, however, were more important in older people. Three areas, nature of work, professional development and career is also the most importance among the areas of internal factors, respectively. Two areas of occupational safety and connection are the most importance among the external factors. Conclusion: Providing the perfect environment, according to members of academic faculty, job security, moral values, decreasing problems of employment due to age and work experience, training individuals and providing a salary based on ability

  4. A study of a photoelectrooptical light modulator for image processing

    Energy Technology Data Exchange (ETDEWEB)

    Bun, A.Z.; Feldvush, V.I.; Merkin, S.U.; Mezhevenko, E.S.; Oparin, A.N.; Potaturkin, O.P.; Sherbakov, G.N.

    1982-01-01

    The operation of a photoelectrooptical spatial modulator as one element in an optoelectronic system is studied during the on-line introduction and initial processing of perceptible images. Possible contouring variations for use with this scheme are analyzed. The use of such a modulator in conjunction with a holographic intensity correlator, upon which the system is based, makes it possible to produce quasioptimal recognition algorithms. Experimental results are given.

  5. Feasibility Studies on Underwater Laser Surface Hardening Process

    OpenAIRE

    Biao Jin; Min Li; TaeWoo Hwang; YoungHoon Moon

    2015-01-01

    Laser surface hardening process is a very promising hardening method for ferrous and nonferrous alloys where transformations occur during cooling after laser melting in the solid state. This study experimentally characterizes laser surface hardening of tool steel in both water and air. For the underwater operation, laser surface scanning is performed over the tool steel surface which is immersed in water. The laser surface hardening tests are performed with a maximum 200 W fiber laser with a ...

  6. USAF Logistics Process Optimization Study for the Aircraft Asset Sustainment Process. Volume 3. Future to be Asset Sustainment Process Model.

    Science.gov (United States)

    2007-11-02

    Models), contains the To-Be Retail Asset Sustainment Process Model displaying the activities and functions related to the improved processes for receipt...of a logistics process model for a more distant future asset sustainment scenario unconstrained by today’s logistics information systems limitations...It also contains a process model reflecting the Reengineering Team’s vision of the future asset sustainment process.

  7. Experimental and theoretical study on the electrospinning nanoporous fibers process

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, Jianghui; Si, Na [National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou (China); Xu, Lan, E-mail: lanxu@suda.edu.cn [National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou (China); Nantong Textile Institute of Soochow University, Nantong (China); Tang, Xiaopeng; Song, Yanhua; Sun, Zhaoyang [National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou (China)

    2016-02-15

    Porous materials can be prepared by sol–gel method, hydrothermal synthesis method, electrospinning and other methods. In this paper, electrospun porous nanofibers were prepared by adjusting electrospinning parameters. And the properties of obtained porous nanofiber mats were investigated. Theoretical analysis and experiment research were carried out to research mechanical mechanism of electrospun porous nanofibers, and could be used to optimize and control the porous structure. The theoretical analysis results were further verified according to the experimental data. In addition, Bernoulli equation was used to study the electrospinning “splaying” process. We found the ratio of pore width to pore length was varied along with the variation of the internal pressure of the jet, and the internal pressure of the jet increases with the velocity of the charged jet decreases. - Highlights: • Mechanical mechanism of electrospun porous nanofibers process was studied. • A simplifying gas–liquid two-phase flow model was established. • Bernoulli equation was used to study the electrospinning “splaying” process. • The theoretical results were in good agreement with the experimental data. • The electrospinning parameters affected the surface morphology of charged jet.

  8. Bureaucracy and Culture: Toward Two-Factor Theory of Organizational Control

    Directory of Open Access Journals (Sweden)

    Tomasz Olejniczak

    2014-03-01

    Full Text Available Purpose: In this article we focus on the issue of organizational control in its bureaucratic and cultural forms. Methodology: This research uses exploratory case study analysis of Matsushita Konosuke’s management style of in the early years of the Panasonic Corporation. Findings: First of all, we fi nd that despite the impressive body of knowledge accumulated over the years, some questions concerning the relationship between two modes of control and their changes over time still remain unanswered. As a result of case study analysis we put forward an original model illustrating the relationship between bureaucratic and cultural modes of control over stages of the organization life cycle. Research implications and limitations: Implications of the study consist of prescriptions on how to successfully exert control by combining formal and informal measures. Main limitations of the study are related to its generalizability. Originality: Originality of the study results both from putting forward a new theoretical models and using original historical case of Panasonic Corporation.

  9. Weak minimum aberration and maximum number of clear two-factor interactions in 2m-p Ⅳ designs

    Institute of Scientific and Technical Information of China (English)

    YANG Guijun; LIU Minqian; ZHANG Runchu

    2005-01-01

    Both the clear effects and minimum aberration criteria are the important rules for the design selection. In this paper, it is proved that some 2m-p Ⅳ designs have weak minimum aberration, by considering the number of clear two-factor interactions in the designs.And some conditions are provided, under which a 2m-p Ⅳ design can have the maximum number of clear two-factor interactions and weak minimum aberration at the same time.Some weak minimum aberration 2m-p Ⅳ designs are provided for illustrations and two nonisomorphic weak minimum aberration 213-6 Ⅳ designs are constructed at the end of this paper.

  10. Industrial and agricultural process heat information user study

    Energy Technology Data Exchange (ETDEWEB)

    Belew, W.W.; Wood, B.L.; Marle, T.L.; Reinhardt, C.L.

    1981-03-01

    The results of a series of telephone interviews with groups of users of information on solar industrial and agricultural process heat (IAPH) are described. These results, part of a larger study on many different solar technologies, identify types of information each group needed and the best ways to get information to each group. In the current study only high-priority groups were examined. Results from 10 IAPH groups of respondents are analyzed in this report: IPH Researchers; APH Researchers; Representatives of Manufacturers of Concentrating and Nonconcentrating Collectors; Plant, Industrial, and Agricultural Engineers; Educators; Representatives of State Agricultural Offices; and County Extension Agents.

  11. Construct Validity of the Psychopathic Personality Inventory Two-Factor Model with Offenders

    Science.gov (United States)

    Patrick, Christopher J.; Edens, John F.; Poythress, Norman G.; Lilienfeld, Scott O.; Benning, Stephen D.

    2006-01-01

    Much of the research on psychopathy has treated it as a unitary construct operationalized by total scores on one (or more) measures. More recent studies on the Psychopathic Personality Inventory (PPI) suggest the existence of two distinct facets of psychopathy with unique external correlates. Here, the authors report reanalyses of two offender…

  12. Study of Fragmentation Process of Fused Fluxes Using Air

    Directory of Open Access Journals (Sweden)

    Daniel Pérez Pérez

    2011-06-01

    Full Text Available In the paper the fragmentation process with air of fused fluxes is studied by means of a particular treatment of the interaction process between the air and flux fluids starting from physical and mathematical considerations of the collision phenomenon which are the result of the application of Newton's mechanics-classical theory. In the paper is schematized the impact and change of trajectory process of the incandescent fused flux flow because of the air mechanical action provided by a blowpipe and the equations referred to the interaction between the fluids are set. As a result, the equations for estimating the exit angle and the average velocities of the pellets formed are determined whenever the interacting air and flux fluxes are known as well as the incidence angles. From the theory developed the essential parameters of the granulation process with air of fused fluxes, by considering the average diameter of the particles to be obtained for their industrial performance can be estimated.

  13. A Comparative Study of Point Cloud Data Collection and Processing

    Science.gov (United States)

    Pippin, J. E.; Matheney, M.; Gentle, J. N., Jr.; Pierce, S. A.; Fuentes-Pineda, G.

    2016-12-01

    Over the past decade, there has been dramatic growth in the acquisition of publicly funded high-resolution topographic data for scientific, environmental, engineering and planning purposes. These data sets are valuable for applications of interest across a large and varied user community. However, because of the large volumes of data produced by high-resolution mapping technologies and expense of aerial data collection, it is often difficult to collect and distribute these datasets. Furthermore, the data can be technically challenging to process, requiring software and computing resources not readily available to many users. This study presents a comparison of advanced computing hardware and software that is used to collect and process point cloud datasets, such as LIDAR scans. Activities included implementation and testing of open source libraries and applications for point cloud data processing such as, Meshlab, Blender, PDAL, and PCL. Additionally, a suite of commercial scale applications, Skanect and Cloudcompare, were applied to raw datasets. Handheld hardware solutions, a Structure Scanner and Xbox 360 Kinect V1, were tested for their ability to scan at three field locations. The resultant data projects successfully scanned and processed subsurface karst features ranging from small stalactites to large rooms, as well as a surface waterfall feature. Outcomes support the feasibility of rapid sensing in 3D at field scales.

  14. Study on mineral processing technology for abrasive minerals

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Seong Woong; Yang, Jung Il; Hwang, Seon Kook; Choi, Yeon Ho; Cho, Ken Joon; Shin, Hee Young [Korea Inst. of Geology Mining and Materials, Taejon (Korea, Republic of)

    1995-12-01

    Buyeo Materials in Buyeogun, Choongnam province is a company producing feldspar concentrate, but does not yet utilize the garnet as abrasive material and other useful heavy minerals wasted out from the process of feldspar ore. The purpose of this study is to develop technology and process for the recovery of garnet concentrate. As results, the garnet is defined as ferro manganese garnet. The optimum process for recovery of garnet concentrate is to primarily concentrate heavy minerals from tailings of feldspar processing. And secondly the heavy minerals concentrated is dried and separated garnet concentrate from other heavy minerals. At this time, the garnet concentrate is yield by 0.176%wt from 0.31%wt of heavy minerals in head ore. The garnet concentrate contains 33.35% SiO{sub 2}, 12.20% Al{sub 2}O{sub 3}, 28.47% Fe{sub 2}O{sub 3}, 11.96% MnO. As for utilization of abrasive materials, a fundamental data was established on technology of grinding and classification. (author). 13 refs., 47 figs., 24 tabs.

  15. A Comparative Study of Default Reasoning and Epistemic Processes

    Institute of Scientific and Technical Information of China (English)

    李未

    1993-01-01

    A comparative study between the theories of default reasoning and open logic is given.Some concepts of open logic,such as new premises,rejections by facts,reconstructions ,epistemic processes,and its limit are introduced to describe th evolution of hypotheses.An improved version of the limit theorem is given and proved.A model-theoretic interpretation of the closed normal defaults is given using the above concepts and the corresponding completeness is proved.Any extension of a closed normal default theory is proved to be the linit of a δ-partial increasing epistemic process of that theory,and vice versa.It is proved that there exist two distinct extensions of a closed normal default theory iff there is an δ-non-monotonic epistemic process of that theory.The completeness of Reiter's proof is also given and proved,in terms of the epistemic processes.Finally,the work is compared with Gaerdenfors's theory of knowledge in flux.

  16. Study of user influence in routine SPM data processing

    Science.gov (United States)

    Nečas, D.; Klapetek, P.

    2017-03-01

    The quantitative results obtained using scanning probe microscopy (SPM) are influenced not only by instrumentation factors, but also by humans—the SPM users that perform the data processing and the evaluation of statistical characteristics, dimensions and other parameters from the images. We investigate this user influence empirically by performing several experiments in which real humans process SPM data in different settings using the same software, and statistically characterise the results. Two types of experiments are conducted: one in a well-defined laboratory setting where prescribed procedures requiring user input are applied by experienced users to large ensembles of similar data; the other in an open setting in which a large group of SPM users evaluate the same images to obtain specified parameters but without external guidance. The open study in particular brings about results that should be alarming for the SPM community and SPM metrology in particular. We also attempt to derive some guidance for the design of SPM data processing software functions from the results and classify the amount of user input in the data processing functions.

  17. The Study of Vibration Processes in Oil Flooded Screw Compressors

    Directory of Open Access Journals (Sweden)

    I. V. Filippov

    2014-01-01

    Full Text Available Vibration processes that accompany most of machines and mechanisms are of interest to the researcher, as a source of information about the technical condition and the nature of the business processes flow. Vibration-based diagnostics of oil flooded screw compressors allows us to estimate the deviation of their operation from the main mode in accordance with changing the settings of vibration processes.The oil flooded screw compressor transition from the main mode of operation to the abnormal one is accompanied by complex gas-dynamic phenomena i.e. the initial gaps and their decays. This leads to changes in the nature of vibration processes, prompting suggestions that there is a relationship to a change of vibration parameters and mode of compressor operation.Studies were conducted by combined method using an analytical calculation of the decay parameters of the initial discontinuity and an experimental one based on the measurement of acceleration on the body of the real oil flooded screw compressor. A virtually adequate reaction of the decay parameters of the initial gap and the peak values of vibration acceleration to the change of operation mode of oil flooded screw compressor has been received. The peak value of the vibration acceleration was selected by the method of Gating being time-coinciding with the beginning discharge phase of the oil flooded screw compressor, and therefore, with the decay time of the initial discontinuity.This indicates a large degree of hypothesis likelihood on an existing initial break in oil flooded screw compressor when operating in abnormal conditions. This work contains the study results of vibration processes and their relationship to the operating mode of the oil flooded screw compressor, which distinguish it from the other works studied vibration processes in reciprocating compressors. The vibration parameters control of operating oil flooded screw compressor allows us to create an automatic capacity control

  18. Bureaucracy and Culture: Toward Two-Factor Theory of Organizational Control

    OpenAIRE

    Tomasz Olejniczak; Kishi Yasuyuki

    2014-01-01

    Purpose: In this article we focus on the issue of organizational control in its bureaucratic and cultural forms. Methodology: This research uses exploratory case study analysis of Matsushita Konosuke’s management style of in the early years of the Panasonic Corporation. Findings: First of all, we fi nd that despite the impressive body of knowledge accumulated over the years, some questions concerning the relationship between two modes of control and their changes over time still remain ...

  19. Industrial process heat case studies. [PROSYS/ECONMAT code

    Energy Technology Data Exchange (ETDEWEB)

    Hooker, D.W.; May, E.K.; West, R.E.

    1980-05-01

    Commercially available solar collectors have the potential to provide a large fraction of the energy consumed for industrial process heat (IPH). Detailed case studies of individual industrial plants are required in order to make an accurate assessment of the technical and economic feasibility of applications. This report documents the results of seven such case studies. The objectives of the case study program are to determine the near-term feasibility of solar IPH in selected industries, identify energy conservation measures, identify conditions of IPH systems that affect solar applications, test SERI's IPH analysis software (PROSYS/ECONOMAT), disseminate information to the industrial community, and provide inputs to the SERI research program. The detailed results from the case studies are presented. Although few near-term, economical solar applications were found, the conditions that would enhance the opportunities for solar IPH applications are identified.

  20. A Process Study of the Development of Virtual Research Environments

    Science.gov (United States)

    Ahmed, I.; Cooper, K.; McGrath, R.; Griego, G.; Poole, M. S.; Hanisch, R. J.

    2014-05-01

    In recent years, cyberinfrastructures have been deployed to create virtual research environments (VREs) - such as the Virtual Astronomical Observatory (VAO) - to enhance the quality and speed of scientific research, and to foster global scientific communities. Our study utilizes process methodology to study the evolution of VREs. This approach focuses on a series of events that bring about or lead to some outcome, and attempts to specify the generative mechanism that could produce the event series. This paper briefly outlines our approach and describes initial results of a case study of the VAO, one of the participating VREs. The case study is based on interviews with seven individuals participating in the VAO, and analysis of project documents and online resources. These sources are hand tagged to identify events related to the thematic tracks, to yield a narrative of the project. Results demonstrate the event series of an organization through traditional methods augmented by virtual sources.

  1. An fMRI study of processing novel metaphoric sentences.

    Science.gov (United States)

    Mashal, N; Faust, M; Hendler, T; Jung-Beeman, M

    2009-01-01

    Due to inconsistent findings, the role of the two cerebral hemispheres in processing metaphoric language is controversial. The present study examined the possibility that these inconsistent findings may be due, at least partly, to differences in the type (i.e., words vs sentences) or the familiarity of the linguistic material. Previous research has shown that novel two-word metaphoric expressions showed stronger activation in the right homologue of Wernicke's area for the novel metaphors than for both literal expressions and unrelated word pairs. In the present study fMRI was used to identify the left (LH) and the right hemisphere (RH) neural networks associated with processing unfamiliar, novel metaphoric sentences taken from poetry, as compared to those involved in processing familiar literal sentences and unfamiliar nonsensical sentences. Across participants, several left lateralised brain regions showed stronger activation for novel metaphoric sentences than for the nonsensical sentences although both types of sentence represent unfamiliar linguistic expressions. Moreover, the metaphoric sentences elicited more activation in the left dorsolateral prefrontal cortex and the posterior middle temporal gyri than did both the literal sentences and the nonsensical sentences. The increased activation in these brain regions might reflect the enhanced demand on the episodic and semantic memory systems in order to generate de-novo verbal semantic associations. The involvement of the left posterior middle temporal gyri could reflect extra reliance on classical brain structures devoted to sentence comprehension.

  2. Process and equipment development for hot isostatic pressing treatability study

    Energy Technology Data Exchange (ETDEWEB)

    Bateman, Ken; Wahlquist, Dennis; Malewitz, Tim

    2015-03-01

    Battelle Energy Alliance (BEA), LLC, has developed processes and equipment for a pilot-scale hot isostatic pressing (HIP) treatability study to stabilize and volume reduce radioactive calcine stored at Idaho National Laboratory (INL). In 2009, the U. S. Department of Energy signed a Record of Decision with the state of Idaho selecting HIP technology as the method to treat 5,800 yd^3 (4,400 m^3) of granular zirconia and alumina calcine produced between 1953 and 1992 as a waste byproduct of spent nuclear fuel reprocessing. Since the 1990s, a variety of radioactive and hazardous waste forms have been remotely treated using HIP within INL hot cells. To execute the remote process at INL, waste is loaded into a stainless-steel or aluminum can, which is evacuated, sealed, and placed into a HIP furnace. The HIP simultaneously heats and pressurizes the waste, reducing its volume and increasing its durability. Two 1 gal cans of calcine waste currently stored in a shielded cask were identified as candidate materials for a treatability study involving the HIP process. Equipment and materials for cask-handling and calcine transfer into INL hot cells, as well as remotely operated equipment for waste can opening, particle sizing, material blending, and HIP can loading have been designed and successfully tested. These results demonstrate BEA’s readiness for treatment of INL calcine.

  3. Highly Automated Agile Testing Process: An Industrial Case Study

    Directory of Open Access Journals (Sweden)

    Jarosław Berłowski

    2016-09-01

    Full Text Available This paper presents a description of an agile testing process in a medium size software project that is developed using Scrum. The research methods used is the case study were as follows: surveys, quantifiable project data sources and qualitative project members opinions were used for data collection. Challenges related to the testing process regarding a complex project environment and unscheduled releases were identified. Based on the obtained results, we concluded that the described approach addresses well the aforementioned issues. Therefore, recommendations were made with regard to the employed principles of agility, specifically: continuous integration, responding to change, test automation and test driven development. Furthermore, an efficient testing environment that combines a number of test frameworks (e.g. JUnit, Selenium, Jersey Test with custom-developed simulators is presented.

  4. Concentrative meditation enhances preattentive processing: a mismatch negativity study.

    Science.gov (United States)

    Srinivasan, Narayanan; Baijal, Shruti

    2007-10-29

    The mismatch negativity (MMN) paradigm that is an indicator of preattentive processing was used to study the effects of concentrative meditation. Sudarshan Kriya Yoga meditation is a yogic exercise practiced in an ordered sequence beginning with breathing exercises, and ending with concentrative (Sahaj Samadhi) meditation. Auditory MMN waveforms were recorded at the beginning and after each of these practices for meditators, and equivalently after relaxation sessions for the nonmeditators. Overall meditators were found to have larger MMN amplitudes than nonmeditators. The meditators also exhibited significantly increased MMN amplitudes immediately after meditation suggesting transient state changes owing to meditation. The results indicate that concentrative meditation practice enhances preattentive perceptual processes, enabling better change detection in auditory sensory memory.

  5. Electronmicroscopic Study of Sand Erosion Processes in Metals.

    Science.gov (United States)

    1979-06-01

    AO—A073 k97 ISRAEL INST OF MEtALS HAIFA - ~ - - — Ffl 11/6 ELECTROI~~ICROSCOPIC STUDY OF SAND EROSION PROCESSES IN METALS, IU) UNCLASSIFIED 79...General Appearance 8 4.2.2 Local Erosion Processes and Hard Phase Par t icles 9 5. Further Discussion 10 S S-_ S _~S _~~SS ~~~ S ~~~~~~~~~~~~~~~~~~ __SS...research was to ga in addit iona l unders tan di ng of the mechanism of loca l mater ia l removal from eroded compos ite meta l l i c surface

  6. Boronic acids as tools to study (plant) developmental processes?

    Science.gov (United States)

    Matthes, Michaela; Torres-Ruiz, Ramón A

    2017-05-04

    Boron (B) is an essential micronutrient for organisms. In plants, B is known to stabilize the cell wall by crosslinking Rhamnogalacturonan II through ester bonds formed with cis-diols of sugar moieties. However, B is believed to be required for additional functions such as stability and function of (plasma membrane) proteins involved in signal transduction pathways. We have recently shown that boronic acids, competitors of B, efficiently induce perfect phenocopies of monopteros mutants. This effect is enigmatic because like B, boronic acids should find numerous cellular targets and thus disturb many biologic processes ending in a spectrum of unspecific embryo phenotypes. Based on chemical characteristics of boronic acids and their derivatives we discuss reasons that could explain this unusual specificity. The peculiarities of this class of compounds could provide new tools for studying developmental processes.

  7. Corrosion processes in quantized semiconductor colloids studied by pulse radiolysis

    Energy Technology Data Exchange (ETDEWEB)

    Nenadovic, M.T.; Nedeljkovic, J.M.; Micic, O.I.

    1987-04-01

    Electron-transfer reactions from different electron donors to PbSe colloids with diameter size less than 5 nm were studied by pulse-radiolysis techniques. Colloidal particles accept electrons from redox couples whose redox potentials are more negative than -0.8 V (vs. NHE). The optical properties of injected electrons show formation of Pb/sup +/ in bulk semiconductor after 1 ms and then reduction to Pb/sup 0/ in a second slower step ca. 10 s after electron injection. This cathodic corrosion process is also the dominant process during illumination of the colloids in the presence of hole scavengers. The photoreductive corrosion can be partially suppressed in the presence of an electron acceptor. Reduction reactions that cannot occur in bulk materials can occur in sufficiently small particles. Other quantized metal selenides show similar behaviour. The largest yield of hydrogen was produced with extremely small ZnSe colloids.

  8. Indonesian EFL Students’ Perspective on Writing Process: A Pilot Study

    Directory of Open Access Journals (Sweden)

    Imelda Hermilinda Abas

    2016-06-01

    Full Text Available The study was aimed at understanding the EFL Indonesian students’ perspective on the writing process. The pilot study involved two male Indonesian postgraduate students in Universiti Utara Malaysia. The Indonesian students were selected based on the following criteria: (1 had enough knowledge in English writing, indicated by the completion of Academic Writing and Research Methodology courses taken in UUM; (2 had written an unpublished thesis during their undergraduate studies in Indonesia and they are writing their master or doctoral thesis in English; (3 used English extensively in writing their assignments, and in daily activities. Pseudonyms were used to refer to the participants as Sukarno and Suharto. The data were collected through in-depth interviews with the participants. The interview sessions took approximately 15-20 minutes for each participant and were videotaped and audiotaped. Semi-structured interview with 15 questions and probes were used. The results showed that the two participants had positive feelings and attitudes towards writing in English. Although they had a hard time in English writing during their undergraduate in Indonesia, they become fond of writing in English in their postgraduate time due to the exposure to English extensively. In composing, they used brainstorming, drafting, pausing, revising and editing in a recursive manner. Keywords: in-depth interview, pilot study, writing process, English as a Foreign Language (EFL

  9. The Bologna Process in Portugal and Poland: A comparative study

    Directory of Open Access Journals (Sweden)

    Eduardo Tomé

    2016-04-01

    Full Text Available We analyze the consequences of the introduction of the EU directed Bologna Process in Portuguese and Polish Universities. Specifically, we study how the Bologna Process has impacted in the employment situations of graduates in Portugal and Poland. Concerning methodology, we use available official data on the implementation of the Bologna Process in Poland and Portugal. We have found that the investment in Higher Education (HE stalled in both countries in the years since the implementation of the Bologna Process due to massive budgetary restrictions. Nevertheless, the stock of HE graduates increased massively, seemingly because the authorities thought that the free market should lead the HE market in the two countries. Employment prospects, unemployment prospects and wages of graduates continued to be much higher than those of non-graduates. But an unexpected divide appeared between graduates and Masters/PhDs, with important social consequences. While the first “saved” themselves and prospered going into high skilled jobs, the later had to endure minimum wage and underskilled occupations. The low payment for these youngsters was also justified because the supply of HE with Bologna increased but the demand by companies did not match. In fact, both Portugal and Poland have stronger needs in the demand side of the market than in the supply side. Finally, both markets continue to be essentially public and the experiences of privatization did not succeed to much. In terms of social implications, the Bologna Process faces in both countries the massive and decisive challenge of eliminating youth unemployment and emigration but this can only be done with the cooperation of companies that should create high paid and high skilled jobs. Only when this occurs the Bologna Process will achieve its ultimate goal of transforming Portugal and Poland in high skilled equibriuns. Let us hope it happens, for the good of the two countries and particularly for the

  10. Information Technology Process Improvement Decision-Making: An Exploratory Study from the Perspective of Process Owners and Process Managers

    Science.gov (United States)

    Lamp, Sandra A.

    2012-01-01

    There is information available in the literature that discusses information technology (IT) governance and investment decision making from an executive-level perception, yet there is little information available that offers the perspective of process owners and process managers pertaining to their role in IT process improvement and investment…

  11. Zone Freezing Study for Pyrochemical Process Waste Minimization

    Energy Technology Data Exchange (ETDEWEB)

    Ammon Williams

    2012-05-01

    Pyroprocessing technology is a non-aqueous separation process for treatment of used nuclear fuel. At the heart of pyroprocessing lies the electrorefiner, which electrochemically dissolves uranium from the used fuel at the anode and deposits it onto a cathode. During this operation, sodium, transuranics, and fission product chlorides accumulate in the electrolyte salt (LiCl-KCl). These contaminates change the characteristics of the salt overtime and as a result, large volumes of contaminated salt are being removed, reprocessed and stored as radioactive waste. To reduce the storage volumes and improve recycling process for cost minimization, a salt purification method called zone freezing has been proposed at Korea Atomic Energy Research Institute (KAERI). Zone freezing is melt crystallization process similar to the vertical Bridgeman method. In this process, the eutectic salt is slowly cooled axially from top to bottom. As solidification occurs, the fission products are rejected from the solid interface and forced into the liquid phase. The resulting product is a grown crystal with the bulk of the fission products near the bottom of the salt ingot, where they can be easily be sectioned and removed. Despite successful feasibility report from KAERI on this process, there were many unexplored parameters to help understanding and improving its operational routines. Thus, this becomes the main motivation of this proposed study. The majority of this work has been focused on the CsCl-LiCl-KCl ternary salt. CeCl3-LiCl-KCl was also investigated to check whether or not this process is feasible for the trivalent species—surrogate for rare-earths and transuranics. For the main part of the work, several parameters were varied, they are: (1) the retort advancement rate—1.8, 3.2, and 5.0 mm/hr, (2) the crucible lid configurations—lid versus no-lid, (3) the amount or size of mixture—50 and 400 g, (4) the composition of CsCl in the salt—1, 3, and 5 wt%, and (5) the

  12. Decision Making Processes for Global Product Development - a Case Study

    DEFF Research Database (Denmark)

    Søndergaard, Erik Stefan; Ahmed-Kristensen, Saeema

    2015-01-01

    to investigate how decisions are made and which information decisions are based on. The study found that decision making is not always structured, and that prioritised decision making is more dominant than planned decision making. The findings set the stage for further analysis of decision making in GPD......Global Product Development (GPD), outsourcing and offshoring of product development is a widespread phenomenon on today’s global economy, and consequently most engineering manufacturing companies will have to make decisions regarding how to organise their product development activities globally....... This paper investigates decision making in the GPD context, partly by summarizing existing literatures and studies in the field, and partly through a case study of decision making processes in a global engineering company. Through interviews a range of GPD decisions were mapped and analysed in order...

  13. The Rosenberg Self-Esteem Scale: a bifactor answer to a two-factor question?

    Science.gov (United States)

    McKay, Michael T; Boduszek, Daniel; Harvey, Séamus A

    2014-01-01

    Despite its long-standing and widespread use, disagreement remains regarding the structure of the Rosenberg Self-Esteem Scale (RSES). In particular, concern remains regarding the degree to which the scale assesses self-esteem as a unidimensional or multidimensional (positive and negative self-esteem) construct. Using a sample of 3,862 high school students in the United Kingdom, 4 models were tested: (a) a unidimensional model, (b) a correlated 2-factor model in which the 2 latent variables are represented by positive and negative self-esteem, (c) a hierarchical model, and (d) a bifactor model. The totality of results including item loadings, goodness-of-fit indexes, reliability estimates, and correlations with self-efficacy measures all supported the bifactor model, suggesting that the 2 hypothesized factors are better understood as "grouping" factors rather than as representative of latent constructs. Accordingly, this study supports the unidimensionality of the RSES and the scoring of all 10 items to produce a global self-esteem score.

  14. 双元性理论视阈中技术学习的双因素测度模型研究%Research on Two-factors Measurement Model of Technological Learning Based on the Theory of Ambidexterity

    Institute of Scientific and Technical Information of China (English)

    李俊华

    2015-01-01

    基于双元性理论对组织技术学习过程进行研究,突破传统学习曲线的单因素局限,从挖掘性学习与探索性学习两个维度,构建双因素测度模型。综合测度组织技术学习率,反映技术学习的两个子过程对组织资源的获取和利用,同时为组织双元性技术创新路径的平衡协调提供依据。%Based on the theory of ambidexterity,the paper studies the learning process of organization's technology,and breaks through the single factor of the limitations of the learning curve.Constructing two-factor measure model from two dimensions of the exploitation study and the exploration study,it measures comprehensively the technological learning rate,and reflects two subprocedures of technological learning process to obtain and make use of organizational resources, as well as provides the basis for the technological innovation of organizational ambidexterity.

  15. STUDIES ON CONTINUOUS GRINDING PROCESS FOR DRIED WATER CHESTNUT KERNEL

    Directory of Open Access Journals (Sweden)

    S.K. GARG

    2010-06-01

    Full Text Available Grinding is a unit operation to break big solid material into smaller pieces. As far as process of grinding is concerned, power consumption, specific energy consumption and particle size distribution and mill capacity are main considerations from engineering point of view. The experiments were conducted to study the effect of speed of mill, sieve size, feed rate and time of grinding on power consumption and average particle diameter of water chestnut in continuous grinding process. Power consumption was measured for a constant feed rate of 1 and 2 kg/h at different speed of the mill varied from 800 to 1200 rpm for the sieve openings of 0.5 mm, 1.0 mm and 2.0 mm. For all the sieve sizes and feed rates, it was observed that as the speed of the mill increases, there is an increase in power consumption and found significantly low for higher sieve size and lower feed rate. The size distribution of the water chestnut kernel for different speeds and sieve sizes at constant feed rate were obtained by sieve analysis. The milling speed has no significant effect on particle size distribution of ground product and mass fraction was minimum at lower feed rate and higher sieve size. Harris model was found best suitable to describe the size distribution in continuous grinding process. Fineness modulus decreases with increase of milling speed for experimental sieve size and feed rate.

  16. Fuzzy-based HAZOP study for process industry.

    Science.gov (United States)

    Ahn, Junkeon; Chang, Daejun

    2016-11-05

    This study proposed a fuzzy-based HAZOP for analyzing process hazards. Fuzzy theory was used to express uncertain states. This theory was found to be a useful approach to overcome the inherent uncertainty in HAZOP analyses. Fuzzy logic sharply contrasted with classical logic and provided diverse risk values according to its membership degree. Appropriate process parameters and guidewords were selected to describe the frequency and consequence of an accident. Fuzzy modeling calculated risks based on the relationship between the variables of an accident. The modeling was based on the mean expected value, trapezoidal fuzzy number, IF-THEN rules, and the center of gravity method. A cryogenic LNG (liquefied natural gas) testing facility was the objective process for the fuzzy-based and conventional HAZOPs. The most significant index is the frequency to determine risks. The comparison results showed that the fuzzy-based HAZOP provides better sophisticated risks than the conventional HAZOP. The fuzzy risk matrix presents the significance of risks, negligible risks, and necessity of risk reduction. Copyright © 2016 Elsevier B.V. All rights reserved.

  17. Study on biodegradation process of lignin by FTIR and DSC.

    Science.gov (United States)

    Liu, Yang; Hu, Tianjue; Wu, Zhengping; Zeng, Guangming; Huang, Danlian; Shen, Ying; He, Xiaoxiao; Lai, Mingyong; He, Yibin

    2014-12-01

    The biodegradation process of lignin by Penicillium simplicissimum was studied to reveal the lignin biodegradation mechanisms. The biodegradation products of lignin were detected using Fourier transform infrared spectroscopy (FTIR), UV-Vis spectrophotometer, different scanning calorimeter (DSC), and stereoscopic microscope. The analysis of FTIR spectrum showed the cleavage of various ether linkages (1,365 and 1,110 cm(-1)), oxidation, and demethylation (2,847 cm(-1)) by comparing the different peak values in the corresponding curve of each sample. Moreover, the differences (Tm and ΔHm values) between the DSC curves indirectly verified the FTIR analysis of biodegradation process. In addition, the effects of adding hydrogen peroxide (H2O2) to lignin biodegradation process were analyzed, which indicated that H2O2 could accelerate the secretion of the MnP and LiP and improve the enzymes activity. What is more, lignin peroxidase and manganese peroxidase catalyzed the lignin degradation effectively only when H2O2 was presented.

  18. Parametric Study of Carbon Nanotube Production by Laser Ablation Process

    Science.gov (United States)

    Arepalli, Sivaram; Nikolaev, Pavel; Holmes, William; Hadjiev, Victor; Scott, Carl

    2002-01-01

    Carbon nanotubes form a new class of nanomaterials that are presumed to have extraordinary mechanical, electrical and thermal properties. The single wall nanotubes (SWNTs) are estimated to be 100 times stronger than steel with 1/6th the weight; electrical carrying capacity better than copper and thermal conductivity better than diamond. Applications of these SWNTs include possible weight reduction of aerospace structures, multifunctional materials, nanosensors and nanoelectronics. Double pulsed laser vaporization process produces SWNTs with the highest percentage of nanotubes in the output material. The normal operating conditions include a green laser pulse closely followed by an infrared laser pulse. Lasers ab late a metal-containing graphite target located in a flow tube maintained in an oven at 1473K with argon flow of 100 sccm at a 500 Torr pressure. In the present work a number of production runs were carried out, changing one operating condition at a time. We have studied the effects of nine parameters, including the sequencing of the laser pulses, pulse separation times, laser energy densities, the type of buffer gas used, oven temperature, operating pressure, flow rate and inner flow tube diameters. All runs were done using the same graphite target. The collected nanotube material was characterized by a variety of analytical techniques including scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman and thermo gravimetric analysis (TGA). Results indicate trends that could be used to optimize the process and increase the efficiency of the production process.

  19. Science into art: A study of the creative process

    Energy Technology Data Exchange (ETDEWEB)

    Marchant, M. [Cosumnes River Coll., Folsom Lake Center, CA (United States); Sesko, S.C. [Lawrence Livermore National Lab., CA (United States)

    1997-03-14

    Objective was to examine the creative process, demonstrated by 5 student participants in a class at the Art Center College of Design in Pasadena CA, from the germ of the creative idea through the final creative product. The students, drawn from classes sponsored by LLNL, were assigned the problem of representing ``big`` science, as practiced at LLNL, in a graphic, artistic, or multimedia product. As a result of this study, it was discovered that the process of creativity with these students was not linear in nature, nor did it strictly follow the traditional creativity 5-step schema of preparation, incubation, insight, evaluation, and elaboration. Of particular interest were several emergent themes of the creative process: spontaneous use of metaphor to describe the Laboratory; a general lack of interest in ``school`` science or mathematics by the American art students; a well developed sense of conscience; and finally, the symbolism inherent in the repeated use of a single artistic element. This use of the circle revealed a continuity of thinking and design perhaps related to the idealistic bias mentioned above.

  20. THE PROCESS OF INTERNATIONALIZATION OF BRAZILIAN FIRMS: STUDY WITH FRANCHISORS

    Directory of Open Access Journals (Sweden)

    Daniela Motta Romeiro Khauaja

    2012-01-01

    Full Text Available The purpose of this study is to analyze the process of internationalization of Brazilian firms, including the motivations for the internationalization, the modes of entry and the difficulties faced during this process. This research is relevant due to the importance of international management for Brazilian firms at the current global scenario. Firstly, it was developed a theoretical basis and, afterwards, an empirical qualitative and exploratory research was carried out. The data were collected from in depth interviews with the representatives of ten Brazilian franchisors that became international, which are associated to the Brazilian Association of Franchising (ABF, who gave support to the research. The analytical procedure adopted was the content analysis. Franchising was chosen because Brazil is one of the most developed countries in this field and franchising is recognized as an important booster of the globalization process. The interviews were conducted with either the owner of the firm or the marketing or international executive officers. The results of the empirical research show that, although Brazilian firms are late movers, the firms analyzed do not seem handicapped in terms of managerial capacity or technological competences. It is clear, nevertheless, that they are late movers because they have a huge internal market to explore. Adopting a global vision is very important, even if they prefer a gradual approach towards internationalization.

  1. Process window study with various illuminations for EUV lithography applications

    Science.gov (United States)

    Lee, Sang Hun; Zhang, Zhiyu

    2007-03-01

    EUV lithography has the ability to support 22 nm logic manufacturing and beyond. Similar to the DUV lithographic systems, partial coherence on EUV lithographic systems can have a big impact on process latitude for critical layers. Thus, it is important to understand the effect of partial coherence on EUV imaging systems. In this paper, process windows with various illumination settings are investigated. The experiments are conducted using the MET station at the Advance Light Source (ALS). In addition to the annular and dipole illuminations which reported in our last paper1, C-quad and Quad illuminations are used to explore the impact of the partial coherence on the process window. Even though the MET system has resolutions below 30nm dense lines, the exposures are targeted for 60nm, 50nm, and 45nm dense features due to the resist limitation. The experimental results are compared with simulation results using Intel's lithography modeling tool, I-Photo. Resist and aerial image threshold models are used for the comparison study. The experimental results correlate well with the resist based simulation results, but some discrepancies are observed for the aerial image threshold cases. We believe the discrepancies are due to the resist limitations. We found that the dipole shows the largest Depth of Focus for dense lines and spaces.

  2. A study of four-fermion processes at LEP

    Science.gov (United States)

    Adam, A.; Adriani, O.; Aguilar-Benitez, M.; Ahlen, S.; Alcaraz, J.; Aloisio, A.; Alverson, G.; Alviggi, M. G.; Ambrosi, G.; An, Q.; Anderhub, H.; Anderson, A. L.; Andreev, V. P.; Angelescu, T.; Antonov, L.; Antreasyan, D.; Arce, P.; Arefiev, A.; Atamanchuk, A.; Azemoon, T.; Aziz, T.; Baba, P. V. K. S.; Bagnaia, P.; Bakken, J. A.; Ball, R. C.; Banerjee, S.; Banicz, K.; Bao, J.; Barillère, R.; Barone, L.; Baschirotto, A.; Battiston, R.; Bay, A.; Becattini, F.; Becker, U.; Behner, F.; Behrens, J.; Bencze, Gy. L.; Berdugo, J.; Berges, P.; Bertucci, B.; Betev, B. L.; Biasini, M.; Biland, A.; Bilei, G. M.; Bizzarri, R.; Blaising, J. J.; Bobbink, G. J.; Bock, R.; Böhm, A.; Borgia, B.; Bosetti, M.; Bourilkov, D.; Bourquin, M.; Boutigny, D.; Bouwens, B.; Brambilla, E.; Branson, J. G.; Brock, I. C.; Brooks, M.; Bujak, A.; Burger, J. D.; Burger, W. J.; Busenitz, J.; Buytenhuijs, A.; Cai, X. D.; Capell, M.; Caria, M.; Carlino, G.; Cartacci, A. M.; Castello, R.; Cerrada, M.; Cesaroni, F.; Chang, Y. H.; Chaturvedi, U. K.; Chemarin, M.; Chen, A.; Chen, C.; Chen, G.; Chen, G. M.; Chen, H. F.; Chen, H. S.; Chen, M.; Chen, W. Y.; Chiefari, G.; Chien, C. Y.; Choi, M. T.; Chung, S.; Civinini, C.; Clare, I.; Clare, R.; Coan, T. E.; Cohn, H. O.; Coignet, G.; Colino, N.; Contin, A.; Costantini, S.; Cotorobai, F.; Cui, X. T.; Cui, X. Y.; Dai, T. S.; D'Alessandro, R.; de Asmundis, R.; Degré, A.; Deiters, K.; Dénes, E.; Denes, P.; DeNotaristefani, F.; Dhina, M.; DiBitonto, D.; Diemoz, M.; Dimitrov, H. R.; Dionisi, C.; Dittmar, M.; Djambazov, L.; Dova, M. T.; Drago, E.; Duchesneau, D.; Duinker, P.; Duran, I.; Easo, S.; El Mamouni, H.; Engler, A.; Eppling, F. J.; Erné, F. C.; Extermann, P.; Fabbretti, R.; Fabre, M.; Falciano, S.; Fan, S. J.; Fackler, O.; Fay, J.; Felcini, M.; Ferguson, T.; Fernandez, D.; Fernandez, G.; Ferroni, F.; Fesefeldt, H.; Fiandrini, E.; Field, J. H.; Filthaut, F.; Fisher, P. H.; Forconi, G.; Fredj, L.; Freudenreich, K.; Friebel, W.; Fukushima, M.; Gailloud, M.; Galaktionov, Yu.; Gallo, E.; Ganguli, S. N.; Garcia-Abia, P.; Gele, D.; Gentile, S.; Gheordanescu, N.; Giagu, S.; Goldfarb, S.; Gong, Z. F.; Gonzalez, E.; Gougas, A.; Goujon, D.; Gratta, G.; Gruenewald, M.; Gu, C.; Guanziroli, M.; Guo, J. K.; Gupta, V. K.; Gurtu, A.; Gustafson, H. R.; Gutay, L. J.; Hangarter, K.; Hasan, A.; Hauschildt, D.; He, C. F.; He, J. T.; Hebbeker, T.; Hebert, M.; Hervé, A.; Hilgers, K.; Hofer, H.; Hoorani, H.; Hu, G.; Hu, G. Q.; Ille, B.; Ilyas, M. M.; Innocente, V.; Janssen, H.; Jin, B. N.; Jones, L. W.; Josa-Mutuberria, I.; Kasser, A.; Khan, R. A.; Kamyshkov, Yu.; Kapinos, P.; Kapustinsky, J. S.; Karyotakis, Y.; Kaur, M.; Khokhar, S.; Kienzle-Focacci, M. N.; Kim, J. K.; Kim, S. C.; Kim, Y. G.; Kinnison, W. W.; Kirkby, A.; Kirkby, D.; Kirsch, S.; Kittel, W.; Klimentov, A.; König, A. C.; Koffeman, E.; Kornadt, O.; Koutsenko, V.; Koulbardis, A.; Kraemer, R. W.; Kramer, T.; Kramer, T.; Krastev, V. R.; Krenz, W.; Krivshich, A.; Kuijten, H.; Kumar, K. S.; Kunin, A.; Landi, G.; Lanske, D.; Lanzano, S.; Lebedev, A.; Lebrun, P.; Lecomte, P.; Lecoq, P.; Le Coultre, P.; Lee, D. M.; Lee, J. S.; Lee, K. Y.; Leedom, I.; Leggett, C.; Le Goff, J. M.; Leiste, R.; Lenti, M.; Leonardi, E.; Li, C.; Li, H. T.; Li, P. J.; Liao, J. Y.; Lin, W. T.; Lin, Z. Y.; Linde, F. L.; Lindemann, B.; Lista, L.; Liu, Y.; Lohmann, W.; Longo, E.; Lu, W.; Lu, Y. S.; Lubbers, J. M.; Lübelsmeyer, K.; Luci, C.; Luckey, D.; Ludovici, L.; Luminari, L.; Lustermann, W.; Ma, J. M.; Ma, W. G.; MacDermott, M.; Malgeri, L.; Malik, R.; Malinin, A.; Maña, C.; Maolinbay, M.; Marchesini, P.; Marion, F.; Marin, A.; Martin, J. P.; Martinez-Laso, L.; Marzano, F.; Massaro, G. G. G.; Mazumdar, K.; McBride, P.; McMahon, T.; McNally, D.; Merk, M.; Merola, L.; Meschini, M.; Metzger, W. J.; Mi, Y.; Mihul, A.; Mills, G. B.; Mir, Y.; Mirabelli, G.; Mnich, J.; Möller, M.; Monteleoni, B.; Morand, R.; Morganti, S.; Moulai, N. E.; Mount, R.; Müller, S.; Nadtochy, A.; Nagy, E.; Napolitano, M.; Nessi-Tedaldi, F.; Newman, H.; Neyer, C.; Niaz, M. A.; Nippe, A.; Nowak, H.; Organtini, G.; Pandoulas, D.; Paoletti, S.; Paolucci, P.; Pascale, G.; Passaleva, G.; Patricelli, S.; Paul, T.; Pauluzzi, M.; Paus, C.; Pauss, F.; Pei, Y. J.; Pensotti, S.; Perret-Gallix, D.; Perrier, J.; Pevsner, A.; Piccolo, D.; Pieri, M.; Piroué, P. A.; Plasil, F.; Plyaskin, V.; Pohl, M.; Pojidaev, V.; Postema, H.; Qi, Z. D.; Qian, J. M.; Qureshi, K. N.; Raghavan, R.; Rahal-Callot, G.; Rancoita, P. G.; Rattaggi, M.; Raven, G.; Razis, P.; Read, K.; Ren, D.; Ren, Z.; Rescigno, M.; Reucroft, S.; Ricker, A.; Riemann, S.; Riemers, B. C.; Riles, K.; Rind, O.; Rizvi, H. A.; Ro, S.; Rodriguez, F. J.; Roe, B. P.; Röhner, M.; Röhner, S.; Romero, L.; Rosier-Lees, S.; Rosmalen, R.; Rosselet, Ph.; van Rossum, W.; Roth, S.; Rubbia, A.; Rubio, J. A.; Rykaczewski, H.; Sachwitz, M.; Salicio, J.; Salicio, J. M.; Sanders, G. S.; Santocchia, A.; Sarakinos, M. S.; Sartorelli, G.; Sassowsky, M.; Sauvage, G.; Schäfer, C.; Schegelsky, V.; Schmitz, D.; Schmitz, P.; Schneegans, M.; Schopper, H.; Schotanus, D. J.; Shotkin, S.; Schreiber, H. J.; Shukla, J.; Schulte, R.; Schultze, K.; Schwenke, J.; Schwering, G.; Sciacca, C.; Scott, I.; Sehgal, R.; Seiler, P. G.; Sens, J. C.; Servoli, L.; Sheer, I.; Shen, D. Z.; Shevchenko, S.; Shi, X. R.; Shumilov, E.; Shoutko, V.; Son, D.; Sopczak, A.; Soulimov, V.; Spickermann, T.; Spillantini, P.; Starosta, R.; Steuer, M.; Stickland, D. P.; Sticozzi, F.; Stone, H.; Strauch, K.; Sudhakar, K.; Sultanov, G.; Sun, L. Z.; Susinno, G. F.; Suter, H.; Swain, J. D.; Syed, A. A.; Tang, X. W.; Taylor, L.; Terzi, G.; Ting, Samuel C. C.; Ting, S. M.; Toker, O.; Tonutti, M.; Tonwar, S. C.; Tóth, J.; Tsaregorodtsev, A.; Tsipolitis, G.; Tully, C.; Tung, K. L.; Ulbricht, J.; Urbán, L.; Uwer, U.; Valente, E.; Van de Walle, R. T.; Vetlitsky, I.; Viertel, G.; Vikas, P.; Vikas, U.; Vivargent, M.; Vogel, H.; Vogt, H.; Vorobiev, I.; Vorobyoy, A. A.; Vuilleumier, L.; Wadhwa, M.; Wallraff, W.; Wang, C.; Wang, C. R.; Wang, X. L.; Wang, Y. F.; Wang, Z. M.; Weber, A.; Weber, J.; Weill, R.; Wenaus, T. J.; Wenninger, J.; White, M.; Willmott, C.; Wittgenstein, F.; Wright, D.; Wu, S. X.; Wynhoff, S.; Wysłouch, B.; Xie, Y. Y.; Xu, J. G.; Xu, Z. Z.; Xue, Z. L.; Yan, D. S.; Yang, B. Z.; Yang, C. G.; Yang, G.; Ye, C. H.; Ye, J. B.; Ye, Q.; Yeh, S. C.; Yin, Z. W.; You, J. M.; Yunus, N.; Yzerman, M.; Zaccardelli, C.; Zemp, P.; Zeng, M.; Zeng, Y.; Zhang, D. H.; Zhang, Z. P.; Zhou, B.; Zhou, G. J.; Zhou, J. F.; Zhu, R. Y.; Zichichi, A.; van der Zwaan, B. C. C.; L3 Collaboration

    1994-01-01

    We have studied the four-fermion processes ee → eeee, ee μμ, ee ττ, μμμμ, μμττ, eeqq and μμqq with the L3 detector at LEP. For an integrated luminosity of 36 pb -, corresponding to 960 000 hadronic Z decays, we find a total of 67 candidate events. The rate and kinematical distributions are found to be consistent with first order Monte Carlo calculations based on the Standard Model. No significant structure is seen in the dilepton invariant or recoil mass spectra.

  3. Study guide to accompany computers data and processing

    CERN Document Server

    Deitel, Harvey M

    1985-01-01

    Study Guide to Accompany Computer and Data Processing provides information pertinent to the fundamental aspects of computers and computer technology. This book presents the key benefits of using computers.Organized into five parts encompassing 19 chapters, this book begins with an overview of the evolution of modern computing systems from the earliest mechanical calculating devices to microchips. This text then introduces computer hardware and describes the processor. Other chapters describe how microprocessors are made and describe the physical operation of computers. This book discusses as w

  4. The Study on Business Growth Process Management Entropy Model

    Science.gov (United States)

    Jing, Duan

    Enterprise's growth is a dynamic process. The factors of enterprise development are changing all the time. For this reason, it is difficult to study management entropy growth-oriented enterprises from static view. Its characteristic is the business enterprise growth stage, and puts forward a kind of measuring and calculating model based on enterprise management entropy for business scale, the enterprise ability and development speed. According to entropy measured by the model, enterprise can adopt revolution measure in the moment of truth. It can make the enterprise avoid crisis and take the road of sustainable development.

  5. Flexibility Study of a Liquid Food Production Process

    DEFF Research Database (Denmark)

    Cheng, Hongyuan; Friis, Alan

    2006-01-01

    Applying process engineering simulation method to model the processing of liquid food can provide a way to build a flexible food factory that can efficiently offer a wide range of tailored products in short delivery time. A milk production process, as an example, is simulated using a process...... engineering software to investigate the process operation conditions and flexibility. The established simulation method can be adapted to simulate similar liquid food production processes through suitable modifications....

  6. Study on the Efficiency of the Vegetables Freezing Process

    Directory of Open Access Journals (Sweden)

    Simona Paulikienė

    2014-10-01

    Full Text Available Changes taking place during the storage of the products of vegetable origin are inevitable. Products can deteriorate and change their shelf appearance, nutritional value, texture, taste and aroma. Freezing is one of the most appropriate technological operations for the product storage. By freezing products of vegetable origin, cleaner production technology can be used to consume less energy and to preserve quality of the product as well as valuable nutritional/ biologically active substances.The study of vegetable freezing process was carried out by freezing red beets. Beetroot was frozen in a chamber with controlled climatic environment - the Feutron.A portion of moisture content always evaporates from products of vegetable origin at freezing. Air flow velocity has a great influence on freezing rate of vegetables. Intensity of moisture evaporation also increases up to the moment of freezing-up of the surface layers.Intensity of retardation of the evaporation process depends on a peel and on stomata on it. Moisture evaporation’s retardation rate of the red beet peel εevp.ap = 0,50 ± 0,02. When air velocity was 0,15 m/s - εevp varied from 0,47 to 0,53, whilst at the air flow velocity 0,65 m/s - εevp = 0,37 – 0,45.Purpose of the study - to analyse the freezing process of vegetables (by the red beetroot example under the influence of different environment factors.DOI: http://dx.doi.org/10.5755/j01.erem.69.3.6064

  7. Study and Redefining Beneficiary Participation in Process Of House Design

    Directory of Open Access Journals (Sweden)

    Monshizadeh Morteza

    2016-01-01

    Full Text Available Since housing has a special place in human life and his physical, psychological and interactions, so in addition the unity of humans, multiplicity and diversity of them must be considered. This possible only by beneficiary participation in the design process, but because society has different economic and social texture and classes; and settling suit because of the time and place of special indexes are entitled, so prepare a comprehensive model includes the testimony and circumstances; identify factors influencing participation optimum need to selection population and certain species of private construction. Standard tool to study topic does not exist, so in order to produce tools using qualitative research methods; interpretation - historical correlation to extract components and variables and their effects on each other and enjoyed target table Content consisting of four domains of general knowledge - specialized knowledge of participation - participation mechanisms and factors influencing participation achieved. Extracted factors are: the initial formation of partnership - partnership executive process - the role of participant - optimal participation; by study and analyze the theoretical model. Due to history and social aspects; cultural participation in Shiraz; promote scientific and participatory approach designed to make operating housing; bed and new horizons of development of facilities and areas in the design of residential environment created and due consultation and decision making in addition to beneficiary participation to promote optimum utility of space; mutual flexibility and utilization of space; increase fixation and motivation will lead beneficiary reside” and the main question: “how is the model of scientific position optimal participation planning instrument in private housing in the city of Shiraz, in the process of design, implementation and use”.

  8. Thermal comfort study of plastics manufacturing industry in converting process

    Directory of Open Access Journals (Sweden)

    Sugiono Sugiono

    2017-09-01

    Full Text Available Thermal comfort is one of ergonomics factors that can create a significant impact to workers performance. For a better thermal comfort, several environment factors (air temperature, wind speed and relative humidity should be considered in this research. The object of the study is a building for converting process of plastics manufacturing industry located in Malang, Indonesia. The maximum air temperature inside the building can reach as high as 36°C. The result of this study shows that heat stress is dominantly caused by heat source from machine and wall building. The computational fluid dynamics (CFD simulation is used to show the air characteristic through inside the building. By using the CFD simulation, some scenarios of solution are successfully presented. Employees thermal comfort was investigated based on predicted mean vote model (PMV and predicted percentage of dissatisfied model (PPD. Existing condition gives PMV in range from 1.83 to 2.82 and PPD in range from 68.9 to 98%. Meanwhile, modification of ventilation and replacing ceiling material from clear glass into reflective clear glass gave significant impact to reduce PMV into range from 1.63 to 2.18 and PPD into range from 58.2 to 84.2%. In sort, new design converting building process has more comfortable for workers.

  9. A study on sampling strategies in the figure cognitive process

    Institute of Scientific and Technical Information of China (English)

    曹立人; 苏昊; 曹珍副

    2004-01-01

    This study was aimed at investigating the sampling strategies for 2 types of figures: 3-D cubes and human faces. The research was focused on: (a) from where the sampling process started; (b) in what order the figures' features were sampled. The study consisted of 2 experiments: (a) sampling strategies for 3-D cubes; (b) sampling strategies for human faces. The results showed that: (a), for 3-D cubes, the first sampling was mostly located at the outline parts, rarely at the center part; while for human faces, the first sampling was mostly located at the hair and outline parts, rarely at the mouth or cheek parts, in most cases, the first sampling-position had no significant effects on cognitive performance and that (b), the sampling order, both for 3-D cubes and for human faces, was determined by the degree of difference among the sampled-features.

  10. A study on sampling strategies in the figure cognitive process

    Institute of Scientific and Technical Information of China (English)

    曹立人; 苏昊; 曹珍副

    2004-01-01

    This study was aimed at investigating the sampling strategies for 2 types of figures: 3-D cubes and human faces.The research was focused on: (a) from where the sampling process started; (b) in what order the figures' features were sampled. The study consisted of 2 experiments: (a) sampling strategies for 3-D cubes; (b) sampling strategies for human faces. The results showed that: (a), for 3-D cubes, the first sampling was mostly located at the outline parts, rarely at the center part; while for human faces, the first sampling was mostly located at the hair and outline parts, rarely at the mouth or cheek parts, in most cases, the first sampling-position had no significant effects on cognitive performance and that (b), the sampling order, both for 3-D cubes and for human faces, was determined by the degree of difference among the sampled-features.

  11. Study on Charged Top-Pion Decay Processes

    Institute of Scientific and Technical Information of China (English)

    WANG Xue-Lei; XU Wen-Na; DU Lin-Lin

    2004-01-01

    In the framework of top-color assisted technicolor (TC2) theory, we study the four decay processes of charged top-pion, i.e., П+t → t-b, П+t → c-b, П+t → W+γ П+t → W+ Z0. The decay branching ratio of these modes are calculated. The results show that the main decay channels of charged top-pion are the tree level modes: П+t → t-b and П+t → c-b. Light П+t is easier to be detected than heavy one at future coliders. So, the study provides us with some useful informations to search for charged top-pion.

  12. THE PROBLEM OF INTERDISCIPLINARITY IN LEARNING PROCESS STUDIES

    Directory of Open Access Journals (Sweden)

    I. M. Osmolovskaya

    2017-01-01

    Full Text Available Introduction. The process of convergence and integration of scientific disciplines involves research in the field of education. Polydisciplinary studies wherein the knowledge is integrated from various scientific disciplines, do not meet the requirements of the solution of complex didactic problems, such as organization of the educational process in the information and educational environment, the construction of education for sustainable development of society, education in modern geopolitical conditions, etc. Thus, the importance of interdisciplinary research with a single subject matter, complementarity of research methods, integrated theoretical grounds and results, will make the contribution to all those scientific fields that are involved in assigned task solution.The aim of the article is to present intermediate results on identification and characteristic features of interdisciplinary studies in the field of education.Methodology and research methods. General scientific theoretical methods of research were used: analysis, comparison, fact-finding, generalization.Results and scientific novelty. An attempt to differentiate the concepts of interdisciplinarity, polydisciplinarity and transdisciplinarity is made. In spite of the fact that these issues are actively discussed in the field of philosophy, there are no precise and unambiguous definitions of these terms; though, there is a research framework, the author of the article makes reference to. The features of an interdisciplinary study are formulated.The functions of didactics as a scientific field are specified. Updating of interdisciplinary studies in education, need of formation of their specific methodologies and expansion of the research field of didactics by means of other interdisciplinary studies and scientific directions are proved. Psycho-didactic and cognitivedidactic studies are considered. Cognitive didactics at the moment does not seem to claim the status of independent

  13. The Development of Experimental Setups And Experimental Studies of The Process of Energy-Technological Processing of Wood

    Science.gov (United States)

    Timerbaev, Nail F.; Safin, Rushan G.; Ziatdinova, Dilyara F.; Fomin, Anatoly A.; Mokhovikov, Alexey A.

    2016-08-01

    The paper describes the experimental setups for the study of the various stages of the process of energy-technological processing of wood waste with the production of synthesis gas. The systems for the study of conjugated processes of drying, pyrolysis and gasification, that are an integral part of energy-technological processing of wood wastes were developed. Experimental studies of the processes have identified their basic properties and optimum operating parameters, allowing to obtain a synthesis gas suitable for the chemical synthesis of various olefins.

  14. BOUND ON THE MAXIMUM NUMBER OF CLEAR TWO-FACTOR INTERACTIONS FOR 2n-(n-k) DESIGNS

    Institute of Scientific and Technical Information of China (English)

    Zhao Shengli; Zhang Runchu

    2008-01-01

    Clear effects criterion is an important criterion for selecting fractional factorial designs [1]. Tang et al. [2] derived upper and lower bounds on the maximum number of clear two-factor interactions (2fi's) in 2n-(n-k) designs of resolution Ⅲ and Ⅳ by constructing 2n-(n-k) designs. But the method in [2] does not perform well sometimes when the resolution is III. This article modifies the construction method for 2n-(n-k) designs of resolution Ⅲ in [2]. The modified method is a great improvement on that used in [2].

  15. Isomer and decay studies for the rp process at IGISOL

    Energy Technology Data Exchange (ETDEWEB)

    Kankainen, A.; Elomaa, V.V.; Eronen, T.; Hakala, J.; Jokinen, A.; Karvonen, P.; Reponen, M.; Rissanen, J.; Saastamoinen, A.; Weber, C.; Aeystoe, J. [University of Jyvaeskylae, Department of Physics, Jyvaeskylae (Finland); Novikov, Yu.N.; Batist, L. [Petersburg Nuclear Physics Institute, Gatchina (Russian Federation); Oinonen, M. [University of Helsinki, Dating Laboratory, Helsinki (Finland); Vorobjev, G. [Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)

    2012-04-15

    This article reviews the decay studies of neutron-deficient nuclei within the mass region A=56-100 performed at the Ion-Guide Isotope Separator On-Line (IGISOL) facility in the University of Jyvaeskylae over last 25 years. Development from He-jet measurements to on-line mass spectrometry, and eventually to atomic mass measurements and post-trap spectroscopy at IGISOL, has yielded studies of around 100 neutron-deficient nuclei over the years. The studies form a solid foundation to astrophysical rp -process path modelling. The focus is on isomers studied either via spectroscopy or via Penning-trap mass measurements. The review is complemented with recent results on the ground and isomeric states of {sup 90}Tc. The excitation energy of the low-spin isomer in {sup 90}Tc has been measured as E{sub x}=144.1(17) keV with JYFLTRAP double Penning trap and the ground state of {sup 90}Tc has been confirmed to be the (8{sup +}) state with a half-life of T{sub 1/2}=49.2(4) s. Finally, the mass-excess results for the spin-gap isomers {sup 53}Co{sup m} and {sup 95}Pd{sup m} and implications from the JYFLTRAP mass measurements for the (21{sup +}) isomer in {sup 94}Ag are discussed. (orig.)

  16. Laser-driven hydrothermal process studied with excimer laser pulses

    Science.gov (United States)

    Mariella, Raymond; Rubenchik, Alexander; Fong, Erika; Norton, Mary; Hollingsworth, William; Clarkson, James; Johnsen, Howard; Osborn, David L.

    2017-08-01

    Previously, we discovered [Mariella et al., J. Appl. Phys. 114, 014904 (2013)] that modest-fluence/modest-intensity 351-nm laser pulses, with insufficient fluence/intensity to ablate rock, mineral, or concrete samples via surface vaporization, still removed the surface material from water-submerged target samples with confinement of the removed material, and then dispersed at least some of the removed material into the water as a long-lived suspension of nanoparticles. We called this new process, which appears to include the generation of larger colorless particles, "laser-driven hydrothermal processing" (LDHP) [Mariella et al., J. Appl. Phys. 114, 014904 (2013)]. We, now, report that we have studied this process using 248-nm and 193-nm laser light on submerged concrete, quartzite, and obsidian, and, even though light at these wavelengths is more strongly absorbed than at 351 nm, we found that the overall efficiency of LDHP, in terms of the mass of the target removed per Joule of laser-pulse energy, is lower with 248-nm and 193-nm laser pulses than with 351-nm laser pulses. Given that stronger absorption creates higher peak surface temperatures for comparable laser fluence and intensity, it was surprising to observe reduced efficiencies for material removal. We also measured the nascent particle-size distributions that LDHP creates in the submerging water and found that they do not display the long tail towards larger particle sizes that we had observed when there had been a multi-week delay between experiments and the date of measuring the size distributions. This is consistent with transient dissolution of the solid surface, followed by diffusion-limited kinetics of nucleation and growth of particles from the resulting thin layer of supersaturated solution at the sample surface.

  17. THE PROCESS CAPABILITY ANALYSIS - A TOOL FOR PROCESS PERFORMANCE MEASURES AND METRICS - A CASE STUDY

    Directory of Open Access Journals (Sweden)

    Yerriswamy Wooluru

    2014-09-01

    Full Text Available Process Capability can be evaluated through the computations of various process capability ratios and indices. The basic three capability indices commonly used in manufacturing industries are Cp, Cpk, Cpm and Cpmk .Process capability indices are intended to provide single number assessment of the ability of a process to meet specification limits on quality characteristics of interest. Thus, it identifies the opportunities for improving quality and productivity. The level of significance on process capability analysis has been increased considerably over last decade, but the literature findings reveal the importance of understanding the concepts, methodologies and critical assumptions while its implementation in manufacturing process. The objective of this paper is to conduct process capability analysis for boring operation by understanding the concepts, methodologies and making critical assumptions.

  18. Study on Thixojoining Process Using Partial Remelting Method

    Directory of Open Access Journals (Sweden)

    M. N. Mohammed

    2013-01-01

    Full Text Available Cold-work tool steel is considered to be a nonweldable metal due to its high percentage content of carbon and alloy elements. The application of a new process of the semisolid joining of two dissimilar metals is proposed. AISI D2 cold-work tool steel was thixojoined to 304 stainless steel by using a partial remelting method. After thixojoining, microstructural examination including metallographic analysis, energy dispersive spectroscopy (EDS, and Vickers hardness tests was performed. From the results, metallographic analyses along the joint interface between semisolid AISI D2 and stainless steel showed a smooth transition from one to another and neither oxides nor microcracking was observed. Hardness values obtained from the points in the diffusion zone were much higher than those in the 304 stainless steel but lower than those in the AISI D2 tool steel. The study revealed that a new type of nonequilibrium diffusion interfacial structure was constructed at the interface of the two different types of steel. The current work successfully confirmed that avoidance of a dendritic microstructure in the semisolid joined zone and high bonding quality components can be achieved without the need for force or complex equipment when compared to conventional welding processes.

  19. Attitude toward money modulates outcome processing: an ERP study.

    Science.gov (United States)

    Jia, Shiwei; Zhang, Wenxin; Li, Peng; Feng, Tingyong; Li, Hong

    2013-01-01

    Love of money (LOM) is concerned with the attitude toward money, which can be measured by the LOM scale through affective, behavioral, and cognitive dimensions. Research has observed that monetary attitude was tightly related to reward processing and could affect economic behavior. This study examined how monetary attitude modulated risky behavior and the underlying neural mechanisms of reward processing using event-related potential (ERP) technique. We compared both the risk level and brain responses of a high-level LOM (HLOM) group to a low-level LOM (LLOM) group using a simple gambling task. The behavioral results showed that the HLOM group was more risky than the LLOM group, particularly after loss. The feedback-related negativity (FRN) was measured as the difference wave (gain-related ERP was subtracted from loss-related ERP). The FRN difference wave was larger in the HLOM group than that in the LLOM group. The P3 in the HLOM group was more positive than that in the LLOM group. These results suggest that monetary attitude can modulate both the underlying neural mechanisms and behavioral performance in a reward-related task. The HLOM participants are more sensitive to gain/loss than the LLOM participants.

  20. Dyadic Coping in Couple Therapy Process: An Exploratory Study.

    Science.gov (United States)

    Margola, Davide; Donato, Silvia; Accordini, Monica; Emery, Robert E; Snyder, Douglas K

    2017-07-10

    This study aimed at moving beyond previous research on couple therapy efficacy by examining moment-by-moment proximal couple and therapist interactions as well as final treatment outcomes and their reciprocal association. Seven hundred four episodes of dyadic coping within 56 early therapy sessions, taken from 28 married couples in treatment, were intensively analyzed and processed using a mixed-methods software (T-LAB). Results showed that negative dyadic coping was self-perpetuating, and therapists tended to passively observe the negative couple interaction; on the contrary, positive dyadic coping appeared to require a therapist's intervention to be maintained, and successful interventions mainly included information gathering as well as interpreting. Couples who dropped out of treatment were not actively engaged from the outset of therapy, and they used more negative dyadic coping, whereas couples who successfully completed treatment showed more positive dyadic coping very early in therapy. Results highlight the role of therapist action and control as critical to establishing rapport and credibility in couple therapy and suggest that dyadic coping patterns early in therapy may contribute to variable treatment response. © 2017 Family Process Institute.

  1. Process Cycle Efficiency Improvement Through Lean: A Case Study

    Directory of Open Access Journals (Sweden)

    P.V. Mohanram

    2011-06-01

    Full Text Available Lean manufacturing is an applied methodology of scientific, objective techniques that cause work tasks in a process to be performed with a minimum of non-value adding activities resulting in greatly reduced wait time, queue time, move time, administrative time, and other delays. This work addresses the implementation of lean principles in a construction equipment company. The prime objective is to evolve and test several strategies to eliminate waste on the shop floor. This paper describes an application of value stream mapping (VSM. Consequently, the present and future states of value stream maps are constructed to improve the production process by identifying waste and its sources. A noticeable reduction in cycle time and increase in cycle efficiency is confirmed. The production flow was optimized thus minimizing several non-value added activities/times such as bottlenecking time, waiting time, material handling time, etc. This case study can be useful in developing a more generic approach to design lean environment.

  2. Experimental Study on Deep Desulfurizer in LF Process

    Institute of Scientific and Technical Information of China (English)

    WU Long; PEI Fen; CHEN Yut; LI Shi-qi

    2012-01-01

    CaO-Al2O3-SiO2-CaF2-MgO was selected as the slag system for desulfurization in LF process.The reaction between steel and slag during desulfurization has been simulated by using Factsage software to study the influence of component on the sulfur distribution ratio.In order to research the influence of CaO content,aluminum powder content and its granularity on desulfurization,laboratory experiments have been carried out in a 200 kg inductive furnace.Results showed that the optimal composition of deep desulfurizer is wCaO=64% and aluminium powder 10% with a granularity of 30 μm.Industrial trials showed that the main composition range of final slag in LF process is wCaO=53.0%-57.0%,wAl2O3=23.4%-25.1%,wSiO2=8.1%-10.0%,and wCaF2=3.2%-4.7%.The sulfur mass percent in steel is lower than 0.0008% with a desulfurization rate above 89%.According to the result of industrial production,this desulfurizer could meet the production requirement for ultra-low sulfur steel,of which sulfur mass percent is under 0.0015%

  3. Interdisciplinary hospice team processes and multidimensional pain: a qualitative study.

    Science.gov (United States)

    Dugan Day, Michele

    2012-01-01

    Hospice teams may address multidimensional pain through the synergistic interaction of team members from various professional disciplines during regularly scheduled team meetings. However, the occurrence of that critical exchange has not been adequately described or documented. The purpose of this qualitative study was to explore two processes in team pain palliation: communication and collaboration. Data were gathered through individual interviews and a 1-year observation of team members from two hospices (physicians, nurses, aides, chaplains, social workers). Utilizing constant comparison, 14 final thematic categories were discovered. Use of biopsychosocial/spiritual terms by all team members meant that the team had the common language needed to communicate about multidimensional pain. Interviews and observation revealed a gap in translating multidisciplinary communication in team meetings into collaborative acts for pain treatment. In addition, structural influences inhibited creativity in pain palliation. There was no mutual understanding of the purpose for team meetings, no recognition of the need to reflect on team process, or common definition of leadership. Social work roles in hospice should include leadership that moves teams toward interdisciplinary care for multidimensional pain.

  4. Study of mixing process in the IRIS downcomer

    Energy Technology Data Exchange (ETDEWEB)

    Diaz, Elizabeth; Montesinos, Maria E.; Garcia, Carlos; Rives, Ronny; Rojas, Leorlen Y., E-mail: ciazbueno@instec.cu, E-mail: mmontesi@instec.cu, E-mail: cgh@instec.cu, E-mail: rsanz@instec.cu, E-mail: leored1984@gmail.com [Instituto Superior de Tecnologias y Ciencias Aplicadas (InSTEC), La Habana (Cuba); Bezerra, Jair L.; Lira, Carlos A.B. de Oliveira, E-mail: jairbezerra@gmail.com, E-mail: cabol@ufpe.br [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Departamento de Energia Nuclear

    2015-07-01

    The reactivity of a water cooled reactor is controlled using control rods or boron dilution in water of the primary circuit. The Boron-10 (10B) is an efficient neutron absorber, especially when used in the absorption of thermal neutrons. Transient analysis with disabilities in the homogenization of Boron in PWR reactors becomes important as the boric acid solution is added to the primary circuit coolant in order to help control the fission rate in the reactor core. After reactor shutdown, the Boron present in coolant has the function of maintaining the reactor subcriticality. The aim of this research is to study the Boron homogenization processes in the downcomer of the IRIS nuclear reactor. It was used a test section, which represents a quarter of the interest geometry to harness the domain symmetry. By using the CFX code, the startup and shutdown were simulated in order to analyze the mixing processes in the coolant. It was evaluated the influence in the Boron homogenization of different geometrical configurations such as three different positions of coolant entrance with respect to the core holders and the variation of the dimensions of the DVI lines. This paper also analyze an event of partial loss of coolant because a coolant pump failure. (author)

  5. Cognitive processes in criminal profile construction: a preliminary study.

    Science.gov (United States)

    Kocsis, Richard N; Middledorp, Jenny; Try, Andrew C

    2005-12-01

    This study undertook an empirically based examination of the cognitive processes associated with the accurate construction of a criminal psychological profile. This was accomplished by comparing the abilities of profilers and nonprofilers in two simulated profiling exercises that measured both profile accuracy and an individual's performance on various tests of memory and comprehension related to the case materials presented in each exercise. The results of these experiments suggest that an incremental relationship exists between comprehension of the case materials and accuracy of the profiles generated. In addition, the findings provide some tentative indications that the comprehension of case material in a narrative (i.e., written) format is an integral cognitive function to proficient profiling.

  6. Drug approval processes: A case study of rivaroxaban

    Directory of Open Access Journals (Sweden)

    Sally A Arif

    2013-01-01

    Full Text Available Rivaroxaban, a Xa inhibitor, was recently approved (March 2013 in the setting of post-acute coronary syndromes (ACS by the European Medicine Agency. This is in contrast to not being approved by the Food and Drug Agency in the United States for the same indication in 2012 and 2013. The FDA′s decision was based on a lack of follow-up data for the patients enrolled in the study based on the pivotal Anti-Xa Therapy to Lower Cardiovascular Events in Addition to Standard Therapy in Subjects with Acute Coronary Syndrome (ATLAS-ACS 2-TIMI 51 trial. While both agencies have similar roles when functioning as drug regulatory bodies and goal of granting approval of safe and efficacious drugs, the difference in approval outcome in the case of rivaroxaban highlights the differences in drug review process when both agencies are presented with the same Phase 3 data to review.

  7. Assertiveness process of Iranian nurse leaders: a grounded theory study.

    Science.gov (United States)

    Mahmoudirad, Gholamhossein; Ahmadi, Fazlollah; Vanaki, Zohreh; Hajizadeh, Ebrahim

    2009-06-01

    The purpose of this study was to explore the assertiveness process in Iranian nursing leaders. A qualitative design based on the grounded theory approach was used to collect and analyze the assertiveness experiences of 12 nurse managers working in four hospitals in Iran. Purposeful and theoretical sampling methods were employed for the data collection and selection of the participants, and semistructured interviews were held. During the data analysis, 17 categories emerged and these were categorized into three themes: "task generation", "assertiveness behavior", and "executive agents". From the participants' experiences, assertiveness theory emerged as being fundamental to the development of a schematic model describing nursing leadership behaviors. From another aspect, religious beliefs also played a fundamental role in Iranian nursing leadership assertiveness. It was concluded that bringing a change in the current support from top managers and improving self-learning are required in order to enhance the assertiveness of the nursing leaders in Iran.

  8. Sample processing for earth science studies at ANTARES

    Science.gov (United States)

    Child, D.; Elliott, G.; Mifsud, C.; Smith, A. M.; Fink, D.

    2000-10-01

    AMS studies in earth sciences at ANTARES, ANSTO created a need for the processing of mineral and ice samples for 10Be, 26Al and 36Cl target preparation. Published procedures have been adapted to our requirements and improved upon where necessary. In particular, new methods to isolate Be with reproducible, high recoveries in the presence of excess Al and Ti were achieved. An existing elution scheme for a cation exchange column procedure was modified to incorporate the use of a 0.25 M H2SO4+0.015% H 2O2 washing step to elute the Ti peroxide complex formed. Problems with dust contamination in ice contributing to measured 10Be signals are also addressed and a procedure developed for its removal.

  9. Study on process control and acceptability of irradiated seasonings

    Science.gov (United States)

    Qixun, Chen; Peishu, Xu; Hao, Chen; Lihua, Chen; Shaobin, Dong

    1993-07-01

    This paper studied the process control and quality control of irradiated seasonings for commercial purpose, market test and consumers' acceptability. The results showed that the rate of relative deviation of dose was less than 2 and the uniformity was better than 1.31 and the number of microbes decreased by 3-4 orders of magnitude after treatment with 8kGy. No pathogenic bacteria were discovered and sensary evaluation as well as quality analysis were not changed. 110 tons of irradiated seasonings have been supplied to domestic markets and stores since 1990. The statistic data of 2045 consumers investigated showed that 67% of consumers heard about food irradiation. 72% of persons and 67% of families were willing to buy irradiated seasonings. This research is a program supported by IAEA and UNDP.

  10. Studies of Ionospheric Processes in the Atmosphere and the Laboratory

    Science.gov (United States)

    2006-06-01

    relevance to HAARP observations, and on vibrationally-excited levels of the O2 ground state [2] and the b1Σ +g excited state [3]. Synergy with the...UT [20] 29.4 (33) 260 0.94 .077 3/24/95 1737 UT 43.4 (44) 278 0.54 0.53 HAARP 62N, 145W 3/20/04 0617 UT [21] 54 (44) 290 0.33 0.54... HAARP 0.62 5.0E8 1.09E8 4.6 Studies of Ionospheric Processes in the Atmosphere and the Laboratory RTO-MP-IST-056 1 - 9 UNCLASSIFIED/UNLIMITED

  11. Study of Dynamic Characteristics of Slow-Changing Process

    Directory of Open Access Journals (Sweden)

    Yinong Li

    2000-01-01

    Full Text Available A vibration system with slow-changing parameters is a typical nonlinear system. Such systems often occur in the working and controlled process of some intelligent structures when vibration and deformation exist synchronously. In this paper, a system with slow-changing stiffness, damping and mass is analyzed in an intelligent structure. The relationship between the amplitude and the frequency of the system is studied, and its dynamic characteristic is also discussed. Finally, a piecewise linear method is developed on the basis of the asymptotic method. The simulation and the experiment show that a suitable slow-changing stiffness can restrain the amplitude of the system when the system passes through the resonant region.

  12. RP process studies with radioactive beams at ATLAS

    Energy Technology Data Exchange (ETDEWEB)

    Rehm, K.E. [Argonne National Lab., Physics Div., Argonne, IL (United States)

    1998-06-01

    Reactions of interest to nuclear astrophysics have been studied with radioactive beams at the ATLAS accelerator. Using a modified ISOL technique, beams of {sup 18}F(T{sub 1/2}=110 min) and {sup 56}Ni(T{sub 1/2}=6.1 d) have been produced. The reactions {sup 18}F(p,{alpha}){sup 15}O, {sup 18}F(p,{gamma}){sup 19}Ne, and {sup 56}Ni(d,p){sup 57}Ni have been investigated. The results indicate that the {sup 18}F(p,{gamma}) route is a small contributor to the breakout from the hot CNO cycle into the rp process, while the {sup 56}Ni(p,{gamma}){sup 57}Cu rate is about ten times larger than previously assumed. (orig.)

  13. A tale of two factors: what determines the rate of progression in Huntington's disease? A longitudinal MRI study.

    Science.gov (United States)

    Rosas, H Diana; Reuter, Martin; Doros, Gheorghe; Lee, Stephanie Y; Triggs, Tyler; Malarick, Keith; Fischl, Bruce; Salat, David H; Hersch, Steven M

    2011-08-01

    Over the past several years, increased attention has been devoted to understanding regionally selective brain changes that occur in Huntington's disease and their relationships to phenotypic variability. Clinical progression is also heterogeneous, and although CAG repeat length influences age of onset, its role, if any, in progression has been less clear. We evaluated progression in Huntington's disease using a novel longitudinal magnetic resonance imaging analysis. Our hypothesis was that the rate of brain atrophy is influenced by the age of onset of Huntington's disease. We scanned 22 patients with Huntington's disease at approximately 1-year intervals; individuals were divided into 1 of 3 groups, determined by the relative age of onset. We found significant differences in the rates of atrophy of cortex, white matter, and subcortical structures; patients who developed symptoms earlier demonstrated the most rapid rates of atrophy compared with those who developed symptoms during middle age or more advanced age. Rates of cortical atrophy were topologically variable, with the most rapid changes occurring in sensorimotor, posterior frontal, and portions of the parietal cortex. There were no significant differences in the rates of atrophy in basal ganglia structures. Although both CAG repeat length and age influenced the rate of change in some regions, there was no significant correlation in many regions. Rates of regional brain atrophy seem to be influenced by the age of onset of Huntington's disease symptoms and are only partially explained by CAG repeat length. These findings suggest that other genetic, epigenetic, and environmental factors play important roles in neurodegeneration in Huntington's disease.

  14. Two-Factor Model of Soil Suction from Capillarity, Shrinkage, Adsorbed Film, and Intra-aggregate Structure

    CERN Document Server

    Chertkov, V Y

    2014-01-01

    The objective of this work is to derive the soil water retention from the soil structure without curve-fitting and only using the physical parameters found irrespective of an experimental retention curve. Two key points underlie the work: (i) the soil suction at drying coincides with that of the soil intra-aggregate matrix and contributive clay; and (ii) both the soil suction and volume shrinkage at drying depend on the same soil water content. In addition the two following results are used: (i) the available two-factor (capillarity and shrinkage) model of clay suction enables one to connect a clay suction and clay water content using the clay matrix structure; and (ii) the recent reference shrinkage curve model based on the concepts of intra-aggregate soil structure permits one to connect the soil water content at shrinkage with the water content of the contributive clay. With that the available two-factor model was essentially modified and, in particular, the effect of adsorbed water film was taken into acc...

  15. The NWMO Study and Process of Collaborative Development

    Energy Technology Data Exchange (ETDEWEB)

    Facella, Jo-Ann [Nuclear Waste Management Organization, Toronto (Canada)

    2006-09-15

    The Nuclear Waste Management Organization (NWMO) was tasked, through federal legislation, to conduct a study of long term approaches for the management of spent nuclear fuel and recommend a preferred approach to the Government of Canada. The Nuclear Fuel Waste Act requires the NWMO to study at least three approaches, one for each of deep geological disposal in the Canadian Shield, storage at nuclear reactor sites, and centralized storage either above or below ground. It also requires that within three years the NWMO make a recommendation to government on a preferred approach for Canada. One of these approaches - that of deep geological disposal in the Canadian Shield - was the subject of an extensive environmental assessment through much of the 1990s. This assessment concluded that, on balance the concept of deep geological disposal had been adequately demonstrated from a technical perspective, but the same was not true from a social perspective. The environmental assessment panel indicated there was no evidence of broad public support for the concept and that it lacked the required level of public acceptability to be adopted. The lesson taken from this assessment was that to choose the right technical solution, we must first ask what requirements the technology has to live up to. We need to know what social values citizens want to protect. The study process was designed to ask Canadians for the list of values and objectives against which a management approach should be assessed, and then engage Canadians in a dialogue to assess the approaches against that list. Citizens were asked to provide direction on: The questions which ought to be asked and answered in the study, and the key issues to be addressed in the assessment of the management approaches; The range of technical methods which ought to be considered in the NWMO study; The risks, costs and benefits of each management approach; and Design of the overarching management structure and implementation plans

  16. Study of pineapple peelings processing into vinegar by biotechnology.

    Science.gov (United States)

    Sossou, Seyram K; Ameyapoh, Yaovi; Karou, Simplice D; de Souza, Comlan

    2009-06-01

    This study aimed to reduce post-harvest losses of pineapple local variety egbenana by the transformation of juice into vinegar through biotechnological process. Vinegar was produced through two successive fermentations: alcoholic and acetic fermentations. The alcohol fermentation was carried out at 30 degrees C using yeast. Biomass, pH and Brix were evaluated daily during the fermentation. Acetic fermentation was carried out at 30 degrees C using an acetic bacteria strain isolated from pineapple wine previously exposed to ambient temperature (28 degrees C) for 5 days. Biomass, pH and acid levels were monitored each 2 days. The performance of acetic bacteria isolated was also assessed by studying their glucose and ethanol tolerance. The study allowed the isolation of yeast coded Saccharomyces cerevisiae (LAS01) and an acetic bacteria coded Acetobacter sp. (ASV03) both occurring in the pineapple juice. The monitoring of successive fermentations indicated that the pineapple juice with sugar concentration of 20 Brix, seeded with 10(6) cells of Saccharomyces cerevisiae (LAS01) for alcoholic fermentation for 4 days and afterwards seeded with 10(6) cells of Acetobacter sp. resulted in 4.5 acetic degree vinegar at Brix 5.3% and pH 2.8 for 23 to 25 days. The study of glucose tolerance of the strain of Acetobacter sp. showed that the growth of acetic bacteria was important in a juice with high concentration of sugar. However, the concentration of ethanol did not effect on the acetic bacteria growth. These results enabled on one hand to improve the manufacturing technology of vinegar from fruits and on the other hand to produce a starter of yeast and acetic bacteria strains for this production.

  17. Cogeneration technology alternatives study. Volume 2: Industrial process characteristics

    Science.gov (United States)

    1980-01-01

    Information and data for 26 industrial processes are presented. The following information is given for each process: (1) a description of the process including the annual energy consumption and product production and plant capacity; (2) the energy requirements of the process for each unit of production and the detailed data concerning electrical energy requirements and also hot water, steam, and direct fired thermal requirements; (3) anticipated trends affecting energy requirements with new process or production technologies; and (4) representative plant data including capacity and projected requirements through the year 2000.

  18. A process mining approach to redesign business processes : A case study in gas industry

    NARCIS (Netherlands)

    van Beest, N. R. T. P.; Maruster, L.; Negru,; Jebelean, T; Petcu, D; Zaharie, D

    2007-01-01

    Nowadays organizations have to adjust their business processes along with the changing environment, in order to maintain a competitive advantage. Often, a change in a part of the system which is to support the business process implies a change of the whole system, which causes complex redesign activ

  19. Process of technology management in SMEs of the metal processing industry – the case study investigation

    Directory of Open Access Journals (Sweden)

    Krawczyk-Dembicka Elżbieta

    2017-03-01

    Full Text Available The main purpose of this work is to identify the factors that influence the process of technology management in the sector of small- and medium-sized enterprises of the metal processing industry, considering the shape and course required to achieve modern operation conditions by enterprises in the market.

  20. Social signal processing for studying parent–infant interaction

    Science.gov (United States)

    Avril, Marie; Leclère, Chloë; Viaux, Sylvie; Michelet, Stéphane; Achard, Catherine; Missonnier, Sylvain; Keren, Miri; Cohen, David; Chetouani, Mohamed

    2014-01-01

    Studying early interactions is a core issue of infant development and psychopathology. Automatic social signal processing theoretically offers the possibility to extract and analyze communication by taking an integrative perspective, considering the multimodal nature and dynamics of behaviors (including synchrony). This paper proposes an explorative method to acquire and extract relevant social signals from a naturalistic early parent–infant interaction. An experimental setup is proposed based on both clinical and technical requirements. We extracted various cues from body postures and speech productions of partners using the IMI2S (Interaction, Multimodal Integration, and Social Signal) Framework. Preliminary clinical and computational results are reported for two dyads (one pathological in a situation of severe emotional neglect and one normal control) as an illustration of our cross-disciplinary protocol. The results from both clinical and computational analyzes highlight similar differences: the pathological dyad shows dyssynchronic interaction led by the infant whereas the control dyad shows synchronic interaction and a smooth interactive dialog. The results suggest that the current method might be promising for future studies. PMID:25540633

  1. NATO Advanced Study Institute on Chemical Transport in Melasomatic Processes

    CERN Document Server

    1987-01-01

    As indicated on the title page, this book is an outgrowth of the NATO Advanced Study Institute (ASI) on Chemical Transport in Metasomatic Processes, which was held in Greece, June 3-16, 1985. The ASI consisted of five days of invited lectures, poster sessions, and discussion at the Club Poseidon near Loutraki, Corinthia, followed by a two-day field trip in Corinthia and Attica. The second week of the ASI consisted of an excursion aboard M/S Zeus, M/Y Dimitrios II, and the M/S Irini to four of the Cycladic Islands to visit, study, and sample outstanding exposures of metasomatic activity on Syros, Siphnos, Seriphos, and Naxos. Nine­ teen invited lectures and 10 session chairmen/discussion leaders participated in the ASI, which was attended by a total of 92 professional scientists and graduate stu­ dents from 15 countries. Seventeen of the invited lectures and the Field Excursion Guide are included in this volume, together with 10 papers and six abstracts representing contributed poster sessions. Although more...

  2. Studies on the runaway reaction of ABS polymerization process.

    Science.gov (United States)

    Hu, Kwan-Hua; Kao, Chen-Shan; Duh, Yih-Shing

    2008-11-15

    Taiwan has the largest acrylonitrile-butadiene-styrene (ABS) copolymer production in the world. Preventing on unexpected exothermic reactions and related emergency relief hazard is essential in the safety control of ABS emulsion polymerization. A VSP2 (Vent Sizing Package 2) apparatus is capable of studying both normal and abnormal conditions (e.g., cooling failure, mischarge, etc.) of industrial process. In this study, the scenarios were verified from the following abnormal conditions: loss of cooling, double charge of initiator, overcharge of monomer, without charge of solvent, and external fire. An external fire with constant heating will promote higher self-heat rate and this is recommended as the worst case scenario of emulsion polymerization on butadiene. Cooling failure coupled with bulk system of reactant was determined to be the credible worst case in ABS emulsion polymerization. Finally, the emergency vent sizing based on thermokinetics from VSP associated with DIERS methodology were used for evaluating the vent sizing and compared to that of the industrial plants.

  3. Ceramic/metal nanocomposites by lyophilization: Processing and HRTEM study

    Energy Technology Data Exchange (ETDEWEB)

    Gutierrez-Gonzalez, C.F. [Centro de Investigacion en Nanomateriales y Nanotecnologia (CINN), Consejo Superior de Investigaciones Cientificas - CSIC - Universidad de Oviedo - UO - Principado de Asturias - PA, Parque Tecnologico de Asturias, 33428 Llanera (Spain); Agouram, S. [Department of Applied Physics and Electromagnetism, Universitat de Valencia, 46100 Burjassot (Spain); Torrecillas, R. [Centro de Investigacion en Nanomateriales y Nanotecnologia (CINN), Consejo Superior de Investigaciones Cientificas - CSIC - Universidad de Oviedo -UO - Principado de Asturias- PA, Parque Tecnologico de Asturias, 33428 Llanera (Spain); Moya, J.S. [Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas (ICMM-CSIC), Cantoblanco, 28049 Madrid (Spain); Lopez-Esteban, S., E-mail: s.lopez@cinn.es [Centro de Investigacion en Nanomateriales y Nanotecnologia (CINN), Consejo Superior de Investigaciones Cientificas - CSIC - Universidad de Oviedo - UO - Principado de Asturias - PA, Parque Tecnologico de Asturias, 33428 Llanera (Spain)

    2012-02-15

    Highlights: Black-Right-Pointing-Pointer A cryogenic route has been used to obtain ceramic/metal nanostructured powders. Black-Right-Pointing-Pointer The powders present good homogeneity and dispersion of metal. Black-Right-Pointing-Pointer The metal nanoparticle size distributions are centred in 17-35 nm. Black-Right-Pointing-Pointer Both phases, ceramic and metal, present a high degree of crystallinity. Black-Right-Pointing-Pointer Good metal/ceramic interfaces due to epitaxial growth, studied by HRTEM. -- Abstract: This work describes a wet-processing route based on spray-freezing and subsequent lyophilization designed to obtain nanostructured ceramic/metal powders. Starting from the ceramic powder and the corresponding metal salt, a water-based suspension is sprayed on liquid nitrogen. The frozen powders are subsequently freeze-dried, calcined and reduced. The material was analyzed using X-ray diffraction analysis at all stages. High resolution transmission electron microscopy studies showed a uniform distribution of metal nanoparticles on the ceramic grain surfaces, good interfaces and high crystallinity, with an average metal particle size in the nanometric range.

  4. Zonotopes and zonoids: studies and applications to separation processes

    Energy Technology Data Exchange (ETDEWEB)

    Daoudi, O.

    1995-10-19

    The geometric modeling of mixture manufacturing management in petrochemical engineering led to consider some particular polytopes called zonotopes. The management criterion used implied the resolution of a constraint nonlinear optimization problem. Data`s problem are constituted of some measured specifications of basic product and hence subject to errors. We study the variation of the optimization problem solution with respect to data. We characterize the confident region of the solution when errors are assumed to be Gaussian and independent. Zonoids are the limit, in Hausdorff metric sense, of a sequence of zonotopes. The geometric modeling of continue manufacturing processes led to consider some particular zonoids called zonoids associated to parametric curves. We give some properties of such convex sets, we present a parametrization of the their boundaries surfaces and we study under some hypothesis the regularity of this parametrization knowing the regularity of the parametric curve. Finally, we tackle the problem of approximation of zonoids by zonotopes in Hausdorff metric sense. A constructive method of zonotope sequences which converge to a given zonoids have been established. For each zonotope, element of such sequences, we evaluate the approximation error. The convergence rates of this sequences is given. (author). 69 refs., 77 figs., 24 tabs.

  5. Social signal processing for studying parent-infant interaction.

    Science.gov (United States)

    Avril, Marie; Leclère, Chloë; Viaux, Sylvie; Michelet, Stéphane; Achard, Catherine; Missonnier, Sylvain; Keren, Miri; Cohen, David; Chetouani, Mohamed

    2014-01-01

    Studying early interactions is a core issue of infant development and psychopathology. Automatic social signal processing theoretically offers the possibility to extract and analyze communication by taking an integrative perspective, considering the multimodal nature and dynamics of behaviors (including synchrony). This paper proposes an explorative method to acquire and extract relevant social signals from a naturalistic early parent-infant interaction. An experimental setup is proposed based on both clinical and technical requirements. We extracted various cues from body postures and speech productions of partners using the IMI2S (Interaction, Multimodal Integration, and Social Signal) Framework. Preliminary clinical and computational results are reported for two dyads (one pathological in a situation of severe emotional neglect and one normal control) as an illustration of our cross-disciplinary protocol. The results from both clinical and computational analyzes highlight similar differences: the pathological dyad shows dyssynchronic interaction led by the infant whereas the control dyad shows synchronic interaction and a smooth interactive dialog. The results suggest that the current method might be promising for future studies.

  6. Anticipatory processes under academic stress: an ERP study.

    Science.gov (United States)

    Duan, Hongxia; Yuan, Yiran; Yang, Can; Zhang, Liang; Zhang, Kan; Wu, Jianhui

    2015-03-01

    It is well known that preparing for and taking high-stakes exams has a significant influence on the emotional and physiological wellbeing of exam-takers, but few studies have investigated the resulting cognitive changes. The current study examined the effect of examination-induced academic stress on anticipation in information processing. Anticipation was indexed using the contingent negative variation (CNV). Electroencephalograms (EEG) were collected from 42 participants using the classic S1-S2 paradigm. These participants were preparing for the Chinese National Postgraduate Entrance Exam (NPEE). EEGs were also collected from 21 age-matched, non-exam comparison participants. The levels of perceived stress and state anxiety were higher and both the initial CNV (iCNV) and the late CNV (lCNV) were more negative in the exam group than in the non-exam group. These results suggest that participants under academic stress experienced greater anticipation of upcoming events. More important, for the non-exam group, state anxiety was positively related to both the iCNV and lCNV amplitude, and this correlation existed when trait anxiety was controlled; however, there was no such relationship in the exam group. These results suggested that the cortical anticipatory activity in the high-stressed exam group reached the maximum ceiling, leaving little room for transient increases in state anxiety.

  7. Aerosol and Trace Gas Processing by Clouds During the Cumulus Humilis Aerosol Processing Study (CHAPS)

    Science.gov (United States)

    Yu, X.; Berg, L.; Berkowitz, C.; Alexander, L.; Lee, Y.; Ogren, J.; Andrews, B.

    2008-12-01

    Clouds play an active role in the processing and cycling of atmospheric constituents. Gases and particles can partition to cloud droplets by absorption and condensation as well as activation and pact scavenging. The Cumulus Humilis Aerosol Processing Study (CHAPS) aimed at characterizing freshly emitted aerosols above, within and below fields of cumulus humilis (or fair-weather cumulus) in the vicinity of Oklahoma City. The experiment took place in June 2007. Evolution of aerosol and cloud properties downwind of the Oklahoma City is of particular interest in this project. These observations of a mid-size and mid-latitude city can be used in the development and evaluation of regional-scale and global climate model cumulus parameterizations that describes the transport and transformations of these aerosols by fair-weather cumulus. The Department of Energy (DOE) G-1 aircraft was one of the main platforms used in CHAPS. It carried a suite of instruments to measure properties of interstitial aerosols behind an isokinetic inlet and a set of duplicate instruments to determine properties of activated particles behind a counter-flow virtual impactor (CVI). The sampling line to the Aerodyne Aerosol Mass Spectrometer was switched between the isokinetic inlet and the CVI to allow characterization of interstitial particles out of clouds in contrast to particles activated in clouds. Trace gases including ozone, carbon monoxide, sulfur dioxide, and a series of volatile organic compounds (VOCs) were also measured as were key meteorological state parameters including liquid water content, cloud drop size, and dew point temperature were measured. This presentation will focus on results related to the transformation and transport of aerosols and trace gases observed in fair-weather cumulus and compare these results with concurrent observations made outside these clouds. Our interest will focus on the differences in particle size and composition under varying conditions. The role of

  8. Multilevel cortical processing of somatosensory novelty: a magnetoencephalography study

    Directory of Open Access Journals (Sweden)

    Gilles eNaeije

    2016-06-01

    Full Text Available Using magnetoencephalography (MEG, this study investigates the spatio-temporal dynamics of the multilevel cortical processing of somatosensory change detection. Neuromagnetic signals of sixteen healthy adult subjects (7 females and 9 males, mean age 29 +/-3 y were recorded using whole-scalp-covering MEG while they underwent an oddball paradigm based on simple standard (right index fingertip tactile stimulation and deviant (simultaneous right index fingertip and middle phalanx tactile stimulation stimuli gathered into sequences to create and then deviate from stimulus patterns at multiple (local versus global levels of complexity. Five healthy adult subjects (3 females and 2 males, mean age 31,6 +/-2 y also underwent a similar oddball paradigm in which standard and deviant stimuli were flipped.Local deviations led to a somatosensory mismatch response peaking at 55-130 ms post-stimulus onset with a cortical generator located at the contralateral secondary somatosensory cortex. The mismatch response was independent of the deviant stimuli physical characteristics. Global deviants led to a P300 response with cortical sources located bilaterally at temporo-parietal junction (TPJ and supplementary motor area (SMA. The posterior parietal cortex (PPC and the SMA were found to generate a contingent magnetic variation (CMV attributed to top-down expectations. Amplitude of mismatch responses were modulated by top-down expectations and correlated with both the magnitude of the CMV and the P300 amplitude at the right TPJ. These results provide novel empirical evidence for a unified sensory novelty detection system in the human brain by linking detection of salient sensory stimuli in personal and extra-personal spaces to a common framework of multilevel cortical processing.

  9. A Study of the Source Processes of Colima Volcano Explosions

    Science.gov (United States)

    Nunez-Cornu, F. J.; Vargas-Bracamontes, D.; Sanchez, J. J.; Suarez-Plascencia, C.

    2007-12-01

    Colima volcano, considered as Mexico's most active volcano, has presented several intermittent effusive and explosive phases in recent years. During 2005, a sequence of explosive events with VEI less than or equal to 3 occurred. This activity presented the most intense explosions since the seismic network was deployed. Many of the explosive events were recorded by the digital three-component seismic stations operated by the University of Guadalajara and Jalisco State Civil Defense. These signals were recorded not only by stations located on the volcanic edifice, but also by stations on the northern coast of Jalisco (MCUJ, BSSJ) and Ceboruco Volcano at 184, 182 and 200 km distance, respectively. A study of these signals will be presented. Each explosion was preceded by a seismic event. Nevertheless, the located earthquakes preceding the explosions did not show a common source under the volcano structure, which suggests the existence of a complex structure with possibly more than one conduit, this is also confirmed from a first motion analysis for station F03J, located 12 km at north of the volcano. From analysis of the first ten seconds of the seismic signal on F03J using different representations of the seismic signals, such as waveforms, spectra, time-frequency and time-scale analysis, it is suggested that the source processes are non-stationary, implying that for the case of this period, a general model of the source process of the Colima volcano explosions can not be formulated. The size of the events is evaluated using different criteria. A clear relation between the magnitude of the seismic signals and the amplitude of the sonic and infrasonic waves was not observed.

  10. Survey of biological processes for odor reduction; Kartlaeggning och studie av biologiska processer foer luktreduktion

    Energy Technology Data Exchange (ETDEWEB)

    Arrhenius, Karine; Rosell, Lars [SP Technical Research Inst. of Sweden, Boraas (Sweden); Hall, Gunnar [SIK Swedish Inst. for Food and Biotechnology, Gothenburg (Sweden)

    2009-09-15

    This project aims to characterize chemical and subsequently odor emissions from a digester plant located closed to Boraas in Sweden (Boraas Energi och Miljoe AB). The digestion produces mainly 2 by-products, biogas and high quality organic biofertilizer. Biogas is a renewable source of electrical and heat energy and subsequently digester have a promising future. Unfortunately, release of unpleasant odours is one of the problems that may limit development of the technique as odours strongly influence the level of acceptance of the neighbours. The number of complaints due to odours depends mostly, upon the degree of odour release, the weather condition and plant environment (which influence the risks for spreading out), and the tolerance of the neighbours. These parameters are strongly variable. Many processes inside the plant distributed on a large surface may contribute to odour release. Chemical emissions were studied, in this project, by extensive sampling inside the plant. Results were then evaluated regarding risk for odour releases. The goal was to suggest controls and routines to limit releases. The conditions leading to the higher risks for odour emissions were studied by performing sampling at different periods of the year and subsequently different weather conditions. At first, places for measurement were chosen together with personal of the plant. Three zones are considered to mainly contribute to the odour emissions: the landfill region, the cisterns region and the leaching lake region. Totally 13 places were studied with regard to odour and chemical emissions under 2008-2009 at different weather conditions. Some results from a previous project (2007) are also presented here. Results show that the spreading out of can be maintained to an acceptable level as long as the plant is functioning without disturbances. The early stages of the treatment of waste should be confined in locals with closed doors to avoid spreading out of odours. Through controlled

  11. Fuzzy forecasting based on two-factors second-order fuzzy-trend logical relationship groups and the probabilities of trends of fuzzy logical relationships.

    Science.gov (United States)

    Chen, Shyi-Ming; Chen, Shen-Wen

    2015-03-01

    In this paper, we present a new method for fuzzy forecasting based on two-factors second-order fuzzy-trend logical relationship groups and the probabilities of trends of fuzzy-trend logical relationships. Firstly, the proposed method fuzzifies the historical training data of the main factor and the secondary factor into fuzzy sets, respectively, to form two-factors second-order fuzzy logical relationships. Then, it groups the obtained two-factors second-order fuzzy logical relationships into two-factors second-order fuzzy-trend logical relationship groups. Then, it calculates the probability of the "down-trend," the probability of the "equal-trend" and the probability of the "up-trend" of the two-factors second-order fuzzy-trend logical relationships in each two-factors second-order fuzzy-trend logical relationship group, respectively. Finally, it performs the forecasting based on the probabilities of the down-trend, the equal-trend, and the up-trend of the two-factors second-order fuzzy-trend logical relationships in each two-factors second-order fuzzy-trend logical relationship group. We also apply the proposed method to forecast the Taiwan Stock Exchange Capitalization Weighted Stock Index (TAIEX) and the NTD/USD exchange rates. The experimental results show that the proposed method outperforms the existing methods.

  12. Puerto Rico - 2002 : field studies to resolve aerosol processes.

    Energy Technology Data Exchange (ETDEWEB)

    Gaffney, J. S.; Marley, N. A.; Ravelo, R.

    1999-10-05

    A number of questions remain concerning homogeneous aerosol formation by natural organics interacting with anthropogenic pollutants. For example, chlorine has been proposed as a potential oxidant in the troposphere because of its very high reactivity with a wide range of organics (Finlayson-Pitts, 1993). Indeed, sea salt aerosol in the presence of ozone has been shown to produce chlorine atoms in heterogeneous photochemical reactions under laboratory conditions. Whether chlorine can initiate oxidation of natural organics such as monoterpene hydrocarbons and can generate homogeneous nucleation or condensable material that contributes to aerosol loadings needs to be assessed. The nighttime reactions of ozone and nitrate radical can also result in monoterpene reactions that contribute to aerosol mass. We are currently planning field studies in Puerto Rico to assess these aerosol issues and other atmospheric chemistry questions. Puerto Rico has a number of key features that make it very attractive for a field study of this sort. The principal feature is the island's very regular meteorology and its position in the Caribbean Sea relative to the easterly trade winds. This meteorology and the island's rectangular shape (100 x 35 miles) make it highly suitable for simplification of boundary layer conditions. In addition, the long stretch between Puerto Rico and the nearest pollution sources in Africa and southern Europe make the incoming background air relatively clean and constant. Furthermore, Puerto Rico has approximately 3.5 million people with a very well defined source region and a central area of rain forest vegetation. These features make Puerto Rico an ideal locale for assessing aerosol processes. The following sections describe specific areas of atmospheric chemistry that can be explored during the proposed field study.

  13. Space Shuttle processing - A case study in artificial intelligence

    Science.gov (United States)

    Mollikarimi, Cindy; Gargan, Robert; Zweben, Monte

    1991-01-01

    A scheduling system incorporating AI is described and applied to the automated processing of the Space Shuttle. The unique problem of addressing the temporal, resource, and orbiter-configuration requirements of shuttle processing is described with comparisons to traditional project management for manufacturing processes. The present scheduling system is developed to handle the late inputs and complex programs that characterize shuttle processing by incorporating fixed preemptive scheduling, constraint-based simulated annealing, and the characteristics of an 'anytime' algorithm. The Space-Shuttle processing environment is modeled with 500 activities broken down into 4000 subtasks and with 1600 temporal constraints, 8000 resource constraints, and 3900 state requirements. The algorithm is shown to scale to very large problems and maintain anytime characteristics suggesting that an automated scheduling process is achievable and potentially cost-effective.

  14. Study on buoyancy convection phenomenon in the crystal growth process

    Institute of Scientific and Technical Information of China (English)

    DUAN Li; KANG Qi

    2009-01-01

    Real-time phase shift Mach-Zehnder interference technique,imaging technique,and computer image processing technique were combined to perform a real-time diagnosis of NaCIO3 crystal,which described both the dissolution process end the crystallization process of the NaCIO3 crystal in real-time condition.The dissolution fringes and the growth fringes in the process were obtained.Moreover,a distribution of concentration field in this process was obtained by inversion calculation.Finally,the buoyancy convection phenomenon caused by gravity in the crystal growth process was analyzed.The results showed that this convection phenomenon directly influences the growth rate of each crystal face in the crystal.

  15. Study on buoyancy convection phenomenon in the crystal growth process

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Real-time phase shift Mach-Zehnder interference technique, imaging technique, and computer image processing technique were combined to perform a real-time diagnosis of NaClO3 crystal, which de- scribed both the dissolution process and the crystallization process of the NaClO3 crystal in real-time condition. The dissolution fringes and the growth fringes in the process were obtained. Moreover, a distribution of concentration field in this process was obtained by inversion calculation. Finally, the buoyancy convection phenomenon caused by gravity in the crystal growth process was analyzed. The results showed that this convection phenomenon directly influences the growth rate of each crystal face in the crystal.

  16. Development studies of a novel wet oxidation process

    Energy Technology Data Exchange (ETDEWEB)

    Rogers, T.W.; Dhooge, P.M.

    1995-12-01

    Many DOE waste streams and remediates contain complex and variable mixtures of organic compounds, toxic metals, and radionuclides. These materials are often dispersed in organic or inorganic matrices, such as personal protective equipment, various sludges, soils, and water. Incineration and similar combustive processes do not appear to be viable options for treatment of these waste streams due to various considerations. There is a need for non-combustion processes with a wide application range to treat the large majority of these waste forms. The non-combustion process should also be safe, effective, cost-competitive, permit-able, and preferrably mobile. This paper describes the DETOX process of organic waste oxidation.

  17. The role of social and ecological processes in structuring animal populations: a case study from automated tracking of wild birds.

    Science.gov (United States)

    Farine, Damien R; Firth, Josh A; Aplin, Lucy M; Crates, Ross A; Culina, Antica; Garroway, Colin J; Hinde, Camilla A; Kidd, Lindall R; Milligan, Nicole D; Psorakis, Ioannis; Radersma, Reinder; Verhelst, Brecht; Voelkl, Bernhard; Sheldon, Ben C

    2015-04-01

    Both social and ecological factors influence population process and structure, with resultant consequences for phenotypic selection on individuals. Understanding the scale and relative contribution of these two factors is thus a central aim in evolutionary ecology. In this study, we develop a framework using null models to identify the social and spatial patterns that contribute to phenotypic structure in a wild population of songbirds. We used automated technologies to track 1053 individuals that formed 73 737 groups from which we inferred a social network. Our framework identified that both social and spatial drivers contributed to assortment in the network. In particular, groups had a more even sex ratio than expected and exhibited a consistent age structure that suggested local association preferences, such as preferential attachment or avoidance. By contrast, recent immigrants were spatially partitioned from locally born individuals, suggesting differential dispersal strategies by phenotype. Our results highlight how different scales of social decision-making, ranging from post-natal dispersal settlement to fission-fusion dynamics, can interact to drive phenotypic structure in animal populations.

  18. Time Reversal Signal Processing in Communications - A Feasibility Study

    Energy Technology Data Exchange (ETDEWEB)

    Meyer, A W; Candy, J V; Poggio, A J

    2002-01-30

    A typical communications channel is subjected to a variety of signal distortions, including multipath, that corrupt the information being transmitted and reduce the effective channel capacity. The mitigation of the multipath interference component is an ongoing concern for communication systems operating in complex environments such as might be experienced inside buildings, urban environments, and hilly or heavily wooded areas. Communications between mobile units and distributed sensors, so important to national security, are dependent upon flawless conveyance of information in complex environments. The reduction of this multipath corruption necessitates better channel equalization, i.e., the removal of channel distortion to extract the transmitted information. But, the current state of the art in channel equalization either requires a priori knowledge of the channel or the use of a known training sequence and adaptive filtering. If the ''assumed'' model within the equalization processor does not at least capture the dominant characteristics of the channel, then the received information may still be highly distorted and possibly useless. Also, the processing required for classical equalization is demanding in computational resources. To remedy this situation, many techniques have been investigated to replace classical equalization. Such a technique, the subject of this feasibility study, is Time Reversal Signal Processing (TRSP). Multipath is particularly insidious and a major factor in the deterioration of communication channels. Unlike most other characteristics that corrupt a communications channel, the detrimental effects of multipath cannot be overcome by merely increasing the transmitted power. Although the power in a signal diminishes as a function of the distance between the transmitter and receiver, multipath further degrades a signal by creating destructive interference that results in a loss of received power in a very localized area

  19. On the Security of a Two-Factor Authentication and Key Agreement Scheme for Telecare Medicine Information Systems.

    Science.gov (United States)

    Arshad, Hamed; Teymoori, Vahid; Nikooghadam, Morteza; Abbassi, Hassan

    2015-08-01

    Telecare medicine information systems (TMISs) aim to deliver appropriate healthcare services in an efficient and secure manner to patients. A secure mechanism for authentication and key agreement is required to provide proper security in these systems. Recently, Bin Muhaya demonstrated some security weaknesses of Zhu's authentication and key agreement scheme and proposed a security enhanced authentication and key agreement scheme for TMISs. However, we show that Bin Muhaya's scheme is vulnerable to off-line password guessing attacks and does not provide perfect forward secrecy. Furthermore, in order to overcome the mentioned weaknesses, we propose a new two-factor anonymous authentication and key agreement scheme using the elliptic curve cryptosystem. Security and performance analyses demonstrate that the proposed scheme not only overcomes the weaknesses of Bin Muhaya's scheme, but also is about 2.73 times faster than Bin Muhaya's scheme.

  20. Generation of induced pluripotent stem cells from human cord blood cells with only two factors: Oct4 and Sox2.

    Science.gov (United States)

    Giorgetti, Alessandra; Montserrat, Nuria; Rodriguez-Piza, Ignacio; Azqueta, Carmen; Veiga, Anna; Izpisúa Belmonte, Juan Carlos

    2010-04-01

    Induced pluripotent stem cells (iPSC) provide an invaluable resource for regenerative medicine as they allow the generation of patient-specific progenitors with potential value for cell therapy. However, in many instances, an off-the-shelf approach is desirable, such as for cell therapy of acute conditions or when the patient's somatic cells are altered as a consequence of a chronic disease or aging. Cord blood (CB) stem cells appear ideally suited for this purpose as they are young cells expected to carry minimal somatic mutations and possess the immunological immaturity of newborn cells; additionally, several hundred thousand immunotyped CB units are readily available through a worldwide network of CB banks. Here we present a detailed protocol for the derivation of CB stem cells and how they can be reprogrammed to pluripotency by retroviral transduction with only two factors (OCT4 and SOX2) in 2 weeks and without the need for additional chemical compounds.

  1. Pilot Study of a Patient-Centered Radiology Process Model.

    Science.gov (United States)

    Swan, J Shannon; Furtado, Vanessa F; Keller, Lisa A; Lotti, Judith Borsody; Saltalamacchia, Catherine A; Lennes, Inga T; Salazar, Gloria M

    2017-02-01

    The Radiology Process Model (RPM) was previously described in terms of its conceptual basis and proposed survey items. The current study describes the first pilot application of the RPM in the field and the results of initial psychometric analysis. We used an Institutional Review Board-approved pilot RPM survey in 100 patients having outpatient interventional radiology procedures. The 24 survey items had 4 or 5 levels of severity. We assessed for missing data, items that patients found confusing, any suggestions by patients for additional items and clarity of items from patient feedback. Factor analysis was performed and internal consistency measured. Construct validity was assessed by correlation of patient responses to the items as a summated scale with a visual analog scale (VAS) they completed indicating their interventional radiology experience. The visual analog scale and the RPM summated scale were strongly correlated (r = 0.7). Factor analysis showed four factors: interactions with facility and doctors/staff, time-sensitive aspects, pain, and anxiety. The items showed high internal consistency (alpha: 0.86) as a group and approximately 0.7 to 0.9 by the factors. Analysis shows that two items could be deleted (cost and communication between radiologist and referrers). Revision of two items and potential addition of others are discussed. The RPM shows initial evidence of psychometric validity and internal consistency reliability. Minor changes are anticipated before wider use. Copyright © 2016 American College of Radiology. Published by Elsevier Inc. All rights reserved.

  2. A comparative kinetic study of SNCR process using ammonia

    Energy Technology Data Exchange (ETDEWEB)

    Javed, M. Tayyeb; Ahmed, Z.; Ibrahim, M. Asim; Irfan, N.

    2008-07-01

    The paper presents comparative kinetic modelling of nitrogen oxides (NOx) removal from flue gases by selective non-catalytic reduction process using ammonia as reducing agent. The computer code SENKIN is used in this study with the three published chemical kinetic mechanisms; Zanoelo, Kilpinen and Skreiberg. Kinetic modeling was performed for an isothermal plug flow reactor at atmospheric pressure so as to compare it with the experimental results. A 500 ppm NOx background in the flue gas is considered and kept constant throughout the investigation. The ammonia performance was modeled in the range of 750 to 1250{sup o}C using the molar ratios NH{sub 3}/NOx from 0.25 to 3.0 and residence times up to 1.5 seconds. The modeling using all the mechanisms exhibits and confirms a temperature window of NOx reduction with ammonia. It was observed that 80% of NOx reduction efficiency could be achieved if the flue gas is given 300 msec to react with ammonia, while it is passing through a section within a temperature range of 910 to 1060{sup o}C (Kilpinen mechanism) or within a temperature range of 925 to 1030{sup o}C (Zanoelo mechanism) or within a temperature range of 890 to 1090{sup o}C (Skreiberg mechanism). 20 refs., 6 figs.

  3. Studies on the refolding process of recombinant horseradish peroxidase.

    Science.gov (United States)

    Asad, Sedigheh; Dabirmanesh, Bahareh; Ghaemi, Nasser; Etezad, Seyed Masoud; Khajeh, Khosro

    2013-06-01

    Horseradish peroxidase (HRP) is an important heme-containing glyco-enzyme that has been used in many biotechnological fields. Valuable proteins like HRP can be obtained in sufficient amounts using Escherichia coli as an expression system. However, frequently, the expression of recombinant enzyme results in inclusion bodies, and the refolding yield is generally low for proteins such as plant peroxidases. In this study, a recombinant HRP was cloned and expressed in the form of inclusion bodies. Initially, the influence of few additives on HRP refolding was assessed by the one factor at a time method. Subsequently, factors with significant effects including glycerol, GSSG/DTT, and the enzyme concentration were selected for further optimization by means of the central composite design of response surface methodology (RSM). Under the obtained optimal condition, refolding increased about twofold. The refolding process was then monitored by the intrinsic fluorescence intensity under optimal conditions (0.35 mM GSSG, 0.044 mM DTT, 7 % glycerol, 1.7 M urea, and 2 mM CaCl2 in 20 mM Tris, pH 8.5) and the reconstitution of heme to the refolded peroxidase was detected by the Soret absorbance. Additionally, samples under unfolding and refolding conditions were analyzed by Zetasizer to determine size distribution in different media.

  4. Single molecule study of a processivity clamp sliding on DNA

    Energy Technology Data Exchange (ETDEWEB)

    Laurence, T A; Kwon, Y; Johnson, A; Hollars, C; O?Donnell, M; Camarero, J A; Barsky, D

    2007-07-05

    Using solution based single molecule spectroscopy, we study the motion of the polIII {beta}-subunit DNA sliding clamp ('{beta}-clamp') on DNA. Present in all cellular (and some viral) forms of life, DNA sliding clamps attach to polymerases and allow rapid, processive replication of DNA. In the absence of other proteins, the DNA sliding clamps are thought to 'freely slide' along the DNA; however, the abundance of positively charged residues along the inner surface may create favorable electrostatic contact with the highly negatively charged DNA. We have performed single-molecule measurements on a fluorescently labeled {beta}-clamp loaded onto freely diffusing plasmids annealed with fluorescently labeled primers of up to 90 bases. We find that the diffusion constant for 1D diffusion of the {beta}-clamp on DNA satisfies D {le} 10{sup -14} cm{sup 2}/s, much slower than the frictionless limit of D = 10{sup -10} cm{sup 2}/s. We find that the {beta} clamp remains at the 3-foot end in the presence of E. coli single-stranded binding protein (SSB), which would allow for a sliding clamp to wait for binding of the DNA polymerase. Replacement of SSB with Human RP-A eliminates this interaction; free movement of sliding clamp and poor binding of clamp loader to the junction allows sliding clamp to accumulate on DNA. This result implies that the clamp not only acts as a tether, but also a placeholder.

  5. Evaluating Decoupling Process in OECD Countries: Case Study of Turkey

    Science.gov (United States)

    An, Nazan; Şengün Ucal, Meltem; Kurnaz, M. Levent

    2017-04-01

    Climate change is at the top of the present and future problems facing humanity. Climate change is now largely attributed to human activities and economic activities are the source of human activities that cause climate change by creating pressure on the environment. Providing the sustainability of resources for the future seems possible by reducing the pressure of these economic activities on the environment. Given the increasing population pressure and growth-focused economies, it is possible to say that achieving decoupling is not so easy on a global basis. It is known that there are some problems in developing countries especially in terms of accessing reliable data in transition and implementation process of decoupling. Developed countries' decoupling practices and proper calculation methods can also be a guide for developing countries. In this study, we tried to calculate the comparative decoupling index for OECD countries and Turkey in terms of data suitability, and we showed the differences between them. We tried to indicate the level of decoupling (weak, stable, strong) for each country. We think that the comparison of Turkey can be an example in terms of developing countries. Acknowledgement: This research has been supported by Bogazici University Research Fund Grant Number 12220.

  6. Studies of electron correlation in the photoionization process

    Energy Technology Data Exchange (ETDEWEB)

    Rosenberg, Richard Allen [Univ. of California, Berkeley, CA (United States)

    1979-03-01

    Electron correlation is a result of the interaction of two or more electrons confined in a region of space, and may conveniently be treated under the formalism of configuration interaction (CI). Photoionization provides a rather direct experimental method for studying configuration interaction. The types of CI involved in the photoionization process can be divided into three categories: initial state configuration interaction (ISCI), final ionic state configuration interaction (FISCI), and continuum state configuration interaction (CSCI). This thesis deals with experimental studies which reveal how the various types of CI may become manifested in photoionization. The experimental methods utilized in this work are photoelectron spectroscopy (PES), electron impact spectroscopy (EIS), and time-resolved fluorescence spectroscopy. The EIS was carried out following the discovery that the UV lamp on a Perkin-Elmer photoelectron spectrometer could be utilized as a source of low energy electrons. The time-resolved fluorescence work utilized both the tunability and the time structure of the radiation available at the Stanford Synchrotron Radiation Laboratory (SSRL). A commercial photoelectron spectrometer equipped with a conventional UV lamp (Hei, Nei) was employed for some of the PES studies, and a novel time-of-flight photoelectron spectrometer was developed for the PES work performed using synchrotron radiation. The PES of Ba, Sm, Eu, and Yb was studied using both Hei (22.22 eV) and Nei (16.85 eV) radiation. Satellite structure observed in these spectra using Nei (and for Yb, Hei also) radiation could be satisfactorily explained by ISCI alone. The Hei spectra of Sm, Eu, and, in particular, Ba showed dramatic changes in the satellite population which could only be explained by a new mechanism, autoionization, which is a special form of CSCI. The detailed nature of this mechanism was explored in Ba using synchrotron radiation. It was found that the autoionizing level decays

  7. Targeted Acoustic Data Processing for Ocean Ecological Studies

    Science.gov (United States)

    Sidorovskaia, N.; Li, K.; Tiemann, C.; Ackleh, A. S.; Tang, T.; Ioup, G. E.; Ioup, J. W.

    2015-12-01

    The Gulf of Mexico is home to many species of deep diving marine mammals. In recent years several ecological studies have collected large volumes of Passive Acoustic Monitoring (PAM) data to investigate the effects of anthropogenic activities on protected and endangered marine mammal species. To utilize these data to their fullest potential for abundance estimates and habitat preference studies, automated detection and classification algorithms are needed to extract species acoustic encounters from a continuous stream of data. The species which phonate in overlapping frequency bands represent a particular challenge. This paper analyzes the performance of a newly developed automated detector for the classification of beaked whale clicks in the Northern Gulf of Mexico. Current used beaked whale classification algorithms rely heavily on experienced human operator involvement in manually associating potential events with a particular species of beaked whales. Our detection algorithm is two-stage: the detector is triggered when the species-representative phonation band energy exceeds the baseline detection threshold. Then multiple event attributes (temporal click duration, central frequency, frequency band, frequency sweep rate, Choi-Williams distribution shape indices) are measured. An attribute vector is then used to discriminate among different species of beaked whales present in the Gulf of Mexico and Risso's dolphins which were recognized to mask the detections of beaked whales in the case of widely used energy-band detectors. The detector is applied to the PAM data collected by the Littoral Acoustic Demonstration Center to estimate abundance trends of beaked whales in the vicinity of the 2010 oil spill before and after the disaster. This algorithm will allow automated processing with minimal operator involvement for new and archival PAM data. [The research is supported by a BP/GOMRI 2015-2017 consortium grant.

  8. Processing Depth and Episodic Retrieval: an fMRI study

    OpenAIRE

    Beratis, Ion

    2010-01-01

    Background. According to the reinstatement theory that stems from the transfer appropriate processing (TAP) and the encoding specificity principles, episodic retrieval involves reactivation of processes and, therefore, of brain regions that were active during encoding. Hence, if two encoding conditions engage different cognitive operations, qualitative differences are expected also to be present at the retrieval phase. Functional neuroimaging applications have detected qualitative differences...

  9. A Process and Outcome Study Examining Career Indecision and Indecisiveness.

    Science.gov (United States)

    Heppner, Mary J.; Hendricks, Frederica

    1995-01-01

    Used both process and outcome measures to investigate the counseling process with an undecided college student and an indecisive one. Results supported previous speculation about the differential utility of interventions for undecided and indecisive clients and suggest that the counselor-client relationship may be important to clients in career…

  10. Study on the Medical Image Distributed Dynamic Processing Method

    Institute of Scientific and Technical Information of China (English)

    张全海; 施鹏飞

    2003-01-01

    To meet the challenge of implementing rapidly advanced, time-consuming medical image processing algorithms,it is necessary to develop a medical image processing technology to process a 2D or 3D medical image dynamically on the web. But in a premier system, only static image processing can be provided with the limitation of web technology. The development of Java and CORBA (common object request broker architecture) overcomes the shortcoming of the web static application and makes the dynamic processing of medical images on the web available. To develop an open solution of distributed computing, we integrate the Java, and web with the CORBA and present a web-based medical image dynamic processing methed, which adopts Java technology as the language to program application and components of the web and utilies the CORBA architecture to cope with heterogeneous property of a complex distributed system. The method also provides a platform-independent, transparent processing architecture to implement the advanced image routines and enable users to access large dataset and resources according to the requirements of medical applications. The experiment in this paper shows that the medical image dynamic processing method implemented on the web by using Java and the CORBA is feasible.

  11. Gaussian process classification of superparamagnetic relaxometry data: Phantom study.

    Science.gov (United States)

    Sovizi, Javad; Mathieu, Kelsey B; Thrower, Sara L; Stefan, Wolfgang; Hazle, John D; Fuentes, David

    2017-07-24

    Superparamagnetic relaxometry (SPMR) is an emerging technology that holds potential for use in early cancer detection. Measurement of the magnetic field after the excitation of cancer-bound superparamagnetic iron oxide nanoparticles (SPIONs) enables the reconstruction of SPIONs spatial distribution and hence tumor detection. However, image reconstruction often requires solving an ill-posed inverse problem that is computationally challenging and sensitive to measurement uncertainty. Moreover, an additional image processing module is required to automatically detect and localize the tumor in the reconstructed image. Our goal is to examine the use of data-driven machine learning technique to detect a weak signal induced by a small cluster of SPIONs (surrogate tumor) in presence of background signal and measurement uncertainty. We aim to investigate the performance of both data-driven and image reconstruction models to characterize situations that one can replace the computationally-challenging reconstruction technique by the data-driven model. We utilize Gaussian process (GP) classification model and a physics-based image reconstruction method, tailored to SPMR datasets that are obtained from (i) in silico simulations designed based on mouse cancer models and (ii) phantom experiments using MagSense system (Imagion Biosystems, Inc.). We investigate the performance of the GP classifier against the reconstruction technique, for different levels of measurement noise, different scenarios of SPIONs distribution, and different concentrations of SPIONs at the surrogate tumor. In our in silico source detection analysis, we were able to achieve high sensitivity results using GP model that outperformed the image reconstruction model for various choices of SPIONs concentration at the surrogate tumor and measurement noise levels. Moreover, in our phantom studies we were able to detect the surrogate tumor phantoms with 5% and 7.3% of the total used SPIONs, surrounded by 9 low

  12. Single and few photon avalanche photodiode detection process study

    Science.gov (United States)

    Blazej, Josef; Prochazka, Ivan

    2009-07-01

    We are presenting the results of the study of the Single Photon Avalanche Diode (SPAD) pulse response risetime and its dependence on several key parameters. We were investigating the unique properties of K14 type SPAD with its high delay uniformity of 200 μm active area and the correlation between the avalanche buildup time and the photon number involved in the avalanche trigger. The detection chip was operated in a passive quenching circuit with active gating. This setup enabled us to monitor the diode reverse current using an electrometer, a fast digitizing oscilloscope, and using a custom design comparator circuit. The electrometer reading enabled to estimate the photon number per detection event, independently on avalanche process. The avalanche build up was recorded on the oscilloscope and processed by custom designed waveform analysis package. The correlation of avalanche build up to the photon number, bias above break, photon absorption location, optical pulse length and photon energy was investigated in detail. The experimental results are presented. The existing solid state photon counting detectors have been dedicated for picosecond resolution and timing stability of single photon events. However, the high timing stability is maintained for individual single photons detection, only. If more than one photon is absorbed within the detector time resolution, the detection delay will be significantly affected. This fact is restricting the application of the solid state photon counters to cases where single photons may be guaranteed, only. For laser ranging purposes it is highly desirable to have a detector, which detects both single photon and multi photon signals with picoseconds stability. The SPAD based photon counter works in a purely digital mode: a uniform output signal is generated once the photon is detected. If the input signal consists of several photons, the first absorbed one triggers the avalanche. Obviously, for multiple photon signals, the

  13. The experimental study on the contact process of passive walking

    Science.gov (United States)

    Qi, Feng; Bi, Lai-Ye; Wang, Tian-Shu; Li, Jun-Feng

    2012-08-01

    The passive dynamic walking is a new concept of biped walking. Researchers have been working on this area with both theoretical analysis and experimental analysis ever since McGeer. This paper presents our compass-like passive walking model with a new set of testing system. Two gyroscopes are used for measuring the angles of two legs, and ten FlexiForce sensors are used for measuring the contact forces on the feet. We got the experimental data on the passive walking process with the validated testing system. A great emphasis was put on the contact process between the feet and the slope. The contact process of the stance leg was divided into four sections, and differences between the real testing contact process and the classic analytical contact process with no bouncing and slipping were summarized.

  14. Study of the ship design process model for collaborative design

    Science.gov (United States)

    He, Ze; Qiu, Chang-Hua; Wang, Neng-Jian

    2005-09-01

    The ship design process model is the basis for developing the ship collaborative design system under network environment. According to the characteristics of the ship design, a method for dividing the ship design process into, three layers is pat forward, that is project layer, design task layer and design activity layer, then the formalized definitions of the ship design process model, the decomposing principles of the ship design process and the architecture of the ship collaborative design (SDPM) system are presented. This method simplifies the activity network makes the optimization and adjustment of the design plan convenient and also makes the design process easier to control and change, at last the architecture of the ship collaborative design system is discussed.

  15. Study of the ship design process model for collaborative design

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    The ship design process model is the basis for developing the ship collaborative design system under network environment.According to the characteristics of the ship design, a method for dividing the ship design process into three layers is pat forward, that is project layer, design task layer and design activity layer, then the formalized definitions of the ship design process model, the decomposing principles of the ship design process and the architecture of the ship collaborative design (SDPM) system are presented. This method simplifies the activity network, makes the optimization and adjustment of the design plan convenient and also makes the design process easier to control and change, at last the architecture of the ship collaborative design system is discussed.

  16. The experimental study on the contact process of passive walking

    Institute of Scientific and Technical Information of China (English)

    Feng Qi; Lai-Ye Bi; Tian-Shu Wang; Jun-Feng Li

    2012-01-01

    The passive dynamic walking is a new concept of biped walking.Researchers have been working on this area with both theoretical analysis and experimental analysis ever since McGeer.This paper presents our compass-like passive walking model with a new set of testing system.Two gyroscopes are used for measuring the angles of two legs,and ten FlexiForce sensors are used for measuring the contact forces on the feet.We got the experimental data on the passive walking process with the validated testing system.A great emphasis was put on the contact process between the feet and the slope.The contact process of the stance leg was divided into four sections,and differences between the real testing contact process and the classic analytical contact process with no bouncing and slipping were summarized.

  17. Process study and exergy analysis of a novel air separation process cooled by LNG cold energy

    Science.gov (United States)

    Xu, Wendong; Duan, Jiao; Mao, Wenjun

    2014-02-01

    In order to resolve the problems of the current air separation process such as the complex process, cumbersome operation and high operating costs, a novel air separation process cooled by LNG cold energy is proposed in this paper, which is based on high-efficiency heat exchanger network and chemical packing separation technology. The operating temperature range of LNG cold energy is widened from 133K-203K to 113K-283K by high-efficiency heat exchanger network and air separation pressure is declined from 0.5MPa to about 0.35MPa due to packing separation technology, thereby greatly improve the energy efficiency. Both the traditional and novel air separation processes are simulated with air handling capacity of 20t·h-1. Comparing with the traditional process, the LNG consumption is reduced by 44.2%, power consumption decrease is 211.5 kWh per hour, which means the annual benefit will be up to 1.218 million CNY. And the exergy efficiency is also improved by 42.5%.

  18. Study the Formation Process of Cuboid Microprotrusion by Glass Molding Process

    Directory of Open Access Journals (Sweden)

    Tao Wang

    2017-02-01

    Full Text Available This paper investigates the formation process of a typical microstructure in the glass microfluidic chip, i.e., cuboid microprotrusion, by the soda-lime glass molding process (GMP. The finite element models on the platform Abaqus/Standard were established for simulating the glass molding process. The glass viscoelasticity at pressing temperature was described by the General Maxwell model. The influence of the temperature, aspect ratio and side wall angle on the replication ratio was investigated, and the corresponding predicted molded profiles were demonstrated as well. The established simulation model was verified by experimental results eventually. It could provide a fundamental experience for optimizing glass molding parameters to fabricate microstructures on glass chips.

  19. Development studies of a novel wet oxidation process

    Energy Technology Data Exchange (ETDEWEB)

    Rogers, T.W.; Dhooge, P.M. [Delphi Research, Inc., Albuquerque, NM (United States)

    1995-10-01

    Many DOE waste streams and remediates contain complex and variable mixtures of organic compounds, toxic metals, and radionuclides. These materials are often dispersed in organic or inorganic matrices, such as personal protective equipment, various sludges, soils, and water. Incineration and similar combustive processes do not appear to be viable options for treatment of these waste streams due to various considerations. The objective of this project is to develop a novel catalytic wet oxidation process for the treatment of multi-component wastes. The DETOX process uses a unique combination of metal catalysts to increase the rate of oxidation of organic materials.

  20. Comparative Study of Image Denoising Algorithms in Digital Image Processing

    Directory of Open Access Journals (Sweden)

    Aarti

    2014-05-01

    Full Text Available This paper proposes a basic scheme for understanding the fundamentals of digital image processing and the image denising algorithm. There are three basic operation categorized on during image processing i.e. image rectification and restoration, enhancement and information extraction. Image denoising is the basic problem in digital image processing. The main task is to make the image free from Noise. Salt & pepper (Impulse noise and the additive white Gaussian noise and blurredness are the types of noise that occur during transmission and capturing. For denoising the image there are some algorithms which denoise the image.

  1. Comparative Study of Image Denoising Algorithms in Digital Image Processing

    Directory of Open Access Journals (Sweden)

    Aarti Kumari

    2015-11-01

    Full Text Available This paper proposes a basic scheme for understanding the fundamentals of digital image processing and the image denising algorithm. There are three basic operation categorized on during image processing i.e. image rectification and restoration, enhancement and information extraction. Image denoising is the basic problem in digital image processing. The main task is to make the image free from Noise. Salt & pepper (Impulse noise and the additive white Gaussian noise and blurredness are the types of noise that occur during transmission and capturing. For denoising the image there are some algorithms which denoise the image.

  2. An experimental study on effect of process parameters in deep ...

    African Journals Online (AJOL)

    DR OKE

    Literature review reveals that the research on various aspects of modeling, simulation and process optimization of deep .... methodology is valuable only when the design parameters are qualitative and discrete. .... Work hardening exponent.

  3. Nuclear structure studies for the astrophysical r-process

    CERN Document Server

    Pfeiffer, B; Thielemann, F K; Walters, W B

    2001-01-01

    The production of the heaviest elements in nature occurs via the r-process, i.e. a combination of rapid neutron captures, the inverse photodisintegrations, and slower beta sup - -decays, beta-delayed processes as well as fission and possibly interactions with intense neutrino fluxes. A correct understanding and modeling requires the knowledge of nuclear properties far from stability and a detailed prescription of the astrophysical environment. Experiments at radioactive ion beam facilities have played a pioneering role in exploring the characteristics of nuclear structure in terms of masses and beta-decay properties. Initial examinations paid attention to highly unstable nuclei with magic neutron numbers and their beta-decay properties, related to the location and height of r-process peaks, while recent activities focus on the evolution of shell effects at large distances from the valley of stability. We show in site-independent applications the effect of both types of nuclear properties on r-process abundanc...

  4. Saltstone studies using the scaled continuous processing facility

    Energy Technology Data Exchange (ETDEWEB)

    Fowley, M. D. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Cozzi, A. D. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Hansen, E. K. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

    2015-08-01

    The Savannah River National Laboratory (SRNL) has supported the Saltstone Facility since its conception with bench-scale laboratory experiments, mid-scale testing at vendor facilities, and consultations and testing at the Saltstone Facility. There have been minimal opportunities for the measurement of rheological properties of the grout slurry at the Saltstone Production Facility (SPF); thus, the Scaled Continuous Processing Facility (SCPF), constructed to provide processing data related to mixing, transfer, and other operations conducted in the SPF, is the most representative process data for determining the expected rheological properties in the SPF. These results can be used to verify the laboratory scale experiments that support the SPF using conventional mixing processes that appropriately represent the shear imparted to the slurry in the SPF.

  5. The MBTI and social information processing: an incremental validity study.

    Science.gov (United States)

    Edwards, John A; Lanning, Kevin; Hooker, Karen

    2002-06-01

    The ability of the Myers-Briggs Type Indicator (MBTI; Myers & McCaulley, 1985) to predict performance on social cognitive tasks tapping information processing effort was assessed. Judgment and intuition interacted to predict amount of attributional adjustment on a dispositional attribution task. The MBTI scales predicted processing above and beyond measures of the five factors, rational-experiential preferences, and causal uncertainty. The relevance of these results for interpretation of the MBTI indexes is discussed.

  6. Study the effect of cryogenic cooling on orthogonal machining Process

    Directory of Open Access Journals (Sweden)

    Arvind Kaushal

    2016-06-01

    Full Text Available In present scenario , all the manufacturing organization aims to maximize the productivity of organization in respect of all the aspect of manufacturing process, in case of machining process, it associated with various factors which affect the productivity directly in sense of tool life . Temperature, cutting forces, shear angle, work-piece surface finishing & accuracy, amount of power consumed in machining process and other thing also. All the factors might be optimized by applying effective and efficient amount of coolant throughout the process, to get desired efficiency of process. A coolant play a vital role in machining operation but which must have specific properties which have been reviewed in previous article of various student , research scholars , scientist and industrial candidates .in this research paper , we were focusing on the effect of cryogenic cooling on cutting temperature , cutting forces , chip behavior , shear angle , when alloy steel EN-8 and aluminum alloy 6061-T89 was machined by carbide cutting tool (coated & uncoated & applying liquid nitrogen as a coolant and observed that temperature was decreased during the machining process about 16% to 27% and cutting forces improved to 13%when the machining was performed , the same without cooling of EN-8 alloy, similarly on the other hand in case of aluminum alloy 6061-T89 , temperature was decreased to 25% to 37% and cutting force improved to 9% .

  7. Study on transient aerodynamic characteristics of parachute opening process

    Institute of Scientific and Technical Information of China (English)

    Li Yu; Xiao Ming

    2007-01-01

    In the research of parachute, canopy inflation process modeling is one of the most complicated tasks. As canopy often experiences the largest deformations and loa-dings during a very short time, it is of great difficulty for theoretical analysis and experimental measurements. In this paper, aerodynamic equations and structural dynamics equa-tions were developed for describing parachute opening process, and an iterative coupling solving strategy incorpo-rating the above equations was proposed for a small-scale, flexible and flat-circular parachute. Then, analyses were car-ried out for canopy geometry, time-dependent pressure diffe-rence between the inside and outside of the canopy, transient vortex around the canopy and the flow field in the radial plane as a sequence in opening process. The mechanism of the canopy shape development was explained from perspective of transient flow fields during the inflation process. Experi-ments of the parachute opening process were conducted in a wind tunnel, in which instantaneous shape of the canopy was measured by high velocity camera and the opening loading was measured by dynamometer balance. The theoretical pre-dictions were found in good agreement with the experimen-tal results, validating the proposed approach. This numerical method can improve the situation of strong dependence of parachute research on wind tunnel tests, and is of signifi-cance to the understanding of the mechanics of parachute inflation process.

  8. Computational Studies for Underground Coal Gasification (UCG) Process

    Science.gov (United States)

    Chatterjee, Dipankar

    2017-07-01

    Underground coal gasification (UCG) is a well proven technology in order to access the coal lying either too deep underground, or is otherwise too costly to be extracted using the conventional mining methods. UCG product gas is commonly used as a chemical feedstock or as fuel for power generation. During the UCG process, a cavity is formed in the coal seam during its conversion to gaseous products. The cavity grows in a three-dimensional fashion as the gasification proceeds. The UCG process is indeed a result of several complex interactions of various geo-thermo-mechanical processes such as the fluid flow, heat and mass transfer, chemical reactions, water influx, thermo-mechanical failure, and other geological aspects. The rate of the growth of this cavity and its shape will have a significant impact on the gas flow patterns, chemical kinetics, temperature distributions, and finally the quality of the product gas. It has been observed that there is insufficient information available in the literature to provide clear insight into these issues. It leaves us with a great opportunity to investigate and explore the UCG process, both from the experimental as well as theoretical perspectives. In the development and exploration of new research, experiment is undoubtedly very important. However, due to the excessive cost involvement with experimentation it is not always recommended for the complicated process like UCG. Recently, with the advent of the high performance computational facilities it is quite possible to make alternative experimentation numerically of many physically involved problems using certain computational tools like CFD (computational fluid dynamics). In order to gain a comprehensive understanding of the underlying physical phenomena, modeling strategies have frequently been utilized for the UCG process. Keeping in view the above, the various modeling strategies commonly deployed for carrying out mathematical modeling of UCG process are described here in

  9. Wetlands in the ecological risk assessment process: A case study

    Energy Technology Data Exchange (ETDEWEB)

    Saban, L.B. [Roy F. Weston, Inc., Seattle, WA (United States)

    1995-12-31

    In the past few years, the ecological risk assessment (ERA) process as outlined in the EPA document Framework for Ecological Risk Assessment has been successfully used to assess risk to birds, mammals, aquatic organisms, plants, and to a limited extent, reptiles and amphibians, but has only recently been applied to wetlands. Due to the unique role that wetlands play in the environment as sources and sinks for nutrients, sediment retention, high productivity, habitat transition zones, aquifer recharge, high diversity and richness of biota, and aesthetic value, it is important to consider the entire wetland system in the ERA process. Because nearly sixty percent of Superfund sites are located in or near wetlands, a comprehensive approach is proposed to evaluate potential risks to flora and fauna in these wetland environments. Using the delineation and functional assessment techniques developed by wetland scientists, an estuarine wetland in western Washington was evaluated within the scope of ERA`S. The ERA was applied to the wetland using functional assessments as an integral part of the problem formulation phase of the risk assessment process. Applying the ERA process to wetlands enhances the functional assessment process and helps to define critical elements to evaluate within wetland systems. The results of this risk assessment help to define patches within a landscape that are potentially at risk and how to prioritize remedial actions.

  10. A Study on the LEED Energy Simulation Process Using BIM

    Directory of Open Access Journals (Sweden)

    Han-Soo Ryu

    2016-02-01

    Full Text Available In the domestic and international environmentally friendly certification system, energy-related credit occupies a high ratio in the total distribution of certification score Leadership in the Energy and Environmental Design (LEED system is a certification system developed by the US Green Building Council (USGBC in order to assess the environmental friendliness of buildings. The energy-related credit is approximately 30% of the total and also the energy simulation ratio specifically is the highest among the single credits as it is 20%. In this research, the energy simulation process using Building Information Modeling (BIM based on the energy simulation case performed at the A-Tower, LEED certification was proposed. It places an emphasis on the verification process which was short in the previous research. The architectural geometry modeled through the BIM tool is converted to the gbXML, and in this process the geometry is verified through the interference check functions, the gbXML Viewer and the FZKViewer. The energy simulation is performed after the verification procedure. The geometry verification process in the A-Tower project is presented throughout this paper. In conclusion, an improved process is proposed for the productivity and reliability of energy simulation.

  11. Development studies for a novel wet oxidation process. Phase 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-07-01

    DETOX{sup SM} is a catalyzed wet oxidation process which destroys organic materials in an acidic water solution of iron at 373 to 473 K. The solution can be used repeatedly to destroy great amounts of organic materials. Since the process is conducted in a contained vessel, air emissions from the process can be well controlled. The solution is also capable of dissolving and concentrating many heavy and radioactive metals for eventual stabilization and disposal. The Phase 2 effort for this project is site selection and engineering design for a DETOX demonstration unit. Site selection was made using a set of site selection criteria and evaluation factors. A survey of mixed wastes at DOE sites was conducted using the Interim Mixed Waste Inventory Report. Sites with likely suitable waste types were identified. Potential demonstration sites were ranked based on waste types, interest, regulatory needs, scheduling, ability to provide support, and available facilities. Engineering design for the demonstration unit is in progress and is being performed by Jacobs Applied Technology. The engineering design proceeded through preliminary process flow diagrams (PFDs), calculation of mass and energy balances for representative waste types, process and instrumentation diagrams (P and IDs), preparation of component specifications, and a firm cost estimate for fabrication of the demonstration unit.

  12. Defense Waste Processing Facility Simulant Chemical Processing Cell Studies for Sludge Batch 9

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Tara E. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Newell, J. David [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Woodham, Wesley H. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

    2016-08-10

    The Savannah River National Laboratory (SRNL) received a technical task request from Defense Waste Processing Facility (DWPF) and Saltstone Engineering to perform simulant tests to support the qualification of Sludge Batch 9 (SB9) and to develop the flowsheet for SB9 in the DWPF. These efforts pertained to the DWPF Chemical Process Cell (CPC). CPC experiments were performed using SB9 simulant (SB9A) to qualify SB9 for sludge-only and coupled processing using the nitric-formic flowsheet in the DWPF. Two simulant batches were prepared, one representing SB8 Tank 40H and another representing SB9 Tank 51H. The simulant used for SB9 qualification testing was prepared by blending the SB8 Tank 40H and SB9 Tank 51H simulants. The blended simulant is referred to as SB9A. Eleven CPC experiments were run with an acid stoichiometry ranging between 105% and 145% of the Koopman minimum acid equation (KMA), which is equivalent to 109.7% and 151.5% of the Hsu minimum acid factor. Three runs were performed in the 1L laboratory scale setup, whereas the remainder were in the 4L laboratory scale setup. Sludge Receipt and Adjustment Tank (SRAT) and Slurry Mix Evaporator (SME) cycles were performed on nine of the eleven. The other two were SRAT cycles only. One coupled flowsheet and one extended run were performed for SRAT and SME processing. Samples of the condensate, sludge, and off-gas were taken to monitor the chemistry of the CPC experiments.

  13. Innovativeness In Process Study Relationship Between Organizational Climate & Innovativeness In Process By SEM

    Directory of Open Access Journals (Sweden)

    fatemeh shakeri

    2012-02-01

    Full Text Available In the world of today, most of countries attempt to improve their productivity and economic status by concentrating on innovation. Organizations have considered factors affecting innovation and have achieved enormous competitive advantages. The aim of this research is to investigate the influence of organizational climate in terms of seven dimensions of cohesiveness, autonomy, challenge, resources, openness to innovation, encouragement and supervision on process innovativeness. Data has been collected by random sampling in Khodrocar Lizing company as a subdivision of Iran Khodro Industrial Group. The validity of the conceptual models of each dimension of climate and process innovativeness has been assessed by confirmatory factor analysis (CFA. Results imply the validity of causal relationship between components and the latent variable except for the cohesiveness dimension. Finally, the hypotheses of research have been examined by structural equation modeling (SEM. Findings imply that challenge, resources, openness to innovation, and supervision influence process innovativeness. Supervision has the highest influence and openness to innovation has negative influence on innovativeness, while in prioritizing the factors by the Vikor technique, openness to innovation has the first rank.

  14. TREATMENT TANK CORROSION STUDIES FOR THE ENHANCED CHEMICAL CLEANING PROCESS

    Energy Technology Data Exchange (ETDEWEB)

    Wiersma, B.

    2011-08-24

    Radioactive waste is stored in high level waste tanks on the Savannah River Site (SRS). Savannah River Remediation (SRR) is aggressively seeking to close the non-compliant Type I and II waste tanks. The removal of sludge (i.e., metal oxide) heels from the tank is the final stage in the waste removal process. The Enhanced Chemical Cleaning (ECC) process is being developed and investigated by SRR to aid in Savannah River Site (SRS) High-Level Waste (HLW) as an option for sludge heel removal. Corrosion rate data for carbon steel exposed to the ECC treatment tank environment was obtained to evaluate the degree of corrosion that occurs. These tests were also designed to determine the effect of various environmental variables such as temperature, agitation and sludge slurry type on the corrosion behavior of carbon steel. Coupon tests were performed to estimate the corrosion rate during the ECC process, as well as determine any susceptibility to localized corrosion. Electrochemical studies were performed to develop a better understanding of the corrosion mechanism. The tests were performed in 1 wt.% and 2.5 wt.% oxalic acid with HM and PUREX sludge simulants. The following results and conclusions were made based on this testing: (1) In 1 wt.% oxalic acid with a sludge simulant, carbon steel corroded at a rate of less than 25 mpy within the temperature and agitation levels of the test. No susceptibility to localized corrosion was observed. (2) In 2.5 wt.% oxalic acid with a sludge simulant, the carbon steel corrosion rates ranged between 15 and 88 mpy. The most severe corrosion was observed at 75 C in the HM/2.5 wt.% oxalic acid simulant. Pitting and general corrosion increased with the agitation level at this condition. No pitting and lower general corrosion rates were observed with the PUREX/2.5 wt.% oxalic acid simulant. The electrochemical and coupon tests both indicated that carbon steel is more susceptible to localized corrosion in the HM/oxalic acid environment than

  15. TREATMENT TANK CORROSION STUDIES FOR THE ENHANCED CHEMICAL CLEANING PROCESS

    Energy Technology Data Exchange (ETDEWEB)

    Wiersma, B.

    2011-08-24

    Radioactive waste is stored in high level waste tanks on the Savannah River Site (SRS). Savannah River Remediation (SRR) is aggressively seeking to close the non-compliant Type I and II waste tanks. The removal of sludge (i.e., metal oxide) heels from the tank is the final stage in the waste removal process. The Enhanced Chemical Cleaning (ECC) process is being developed and investigated by SRR to aid in Savannah River Site (SRS) High-Level Waste (HLW) as an option for sludge heel removal. Corrosion rate data for carbon steel exposed to the ECC treatment tank environment was obtained to evaluate the degree of corrosion that occurs. These tests were also designed to determine the effect of various environmental variables such as temperature, agitation and sludge slurry type on the corrosion behavior of carbon steel. Coupon tests were performed to estimate the corrosion rate during the ECC process, as well as determine any susceptibility to localized corrosion. Electrochemical studies were performed to develop a better understanding of the corrosion mechanism. The tests were performed in 1 wt.% and 2.5 wt.% oxalic acid with HM and PUREX sludge simulants. The following results and conclusions were made based on this testing: (1) In 1 wt.% oxalic acid with a sludge simulant, carbon steel corroded at a rate of less than 25 mpy within the temperature and agitation levels of the test. No susceptibility to localized corrosion was observed. (2) In 2.5 wt.% oxalic acid with a sludge simulant, the carbon steel corrosion rates ranged between 15 and 88 mpy. The most severe corrosion was observed at 75 C in the HM/2.5 wt.% oxalic acid simulant. Pitting and general corrosion increased with the agitation level at this condition. No pitting and lower general corrosion rates were observed with the PUREX/2.5 wt.% oxalic acid simulant. The electrochemical and coupon tests both indicated that carbon steel is more susceptible to localized corrosion in the HM/oxalic acid environment than

  16. Impact of Altimeter Data Processing on Sea Level Studies

    Directory of Open Access Journals (Sweden)

    Clara Lázaro

    2006-03-01

    Full Text Available This study addresses the impact of satellite altimetry data processing on sea levelstudies at regional scale, with emphasis on the influence of various geophysical correctionsand satellite orbit on the structure of the derived interannual signal and sea level trend. Thework focuses on the analysis of TOPEX data for a period of over twelve years, for threeregions in the North Atlantic: Tropical (0o≤φ≤25o, Sub-Tropical (25o≤φ≤50o and Sub-Arctic (50o≤φ≤65o. For this analysis corrected sea level anomalies with respect to a meansea surface model have been derived from the GDR-Ms provided by AVISO by applyingvarious state-of-the-art models for the geophysical corrections. Results show that sea leveltrend determined from TOPEX altimetry is dependent on the adopted models for the majorgeophysical corrections. The main effects come from the sea state bias (SSB, and from theapplication or not of the inverse barometer (IB correction. After an appropriate modellingof the TOPEX A/B bias, the two analysed SSB models induce small variations in sea leveltrend, from 0.0 to 0.2 mm/yr, with a small latitude dependence. The difference in sea leveltrend determined by a non IB-corrected series and an IB-corrected one has a strong regionaldependence with large differences in the shape of the interannual signals and in the derivedlinear trends. The use of two different drift models for the TOPEX Microwave Radiometer(TMR has a small but non negligible effect on the North Atlantic sea level trend of about0.1 mm/yr. The interannual signals of sea level time series derived with the NASA and theCNES orbits respectively, show a small departure in the middle of the series, which has noimpact on the derived sea level trend. These results strike the need for a continuousimprovement in the modelling of the various effects that influence the altimetermeasurement.

  17. Syntactic processing with aging: an event-related potential study.

    Science.gov (United States)

    Kemmer, Laura; Coulson, Seana; De Ochoa, Esmeralda; Kutas, Marta

    2004-05-01

    To assess age-related changes in simple syntactic processing with normal aging, event-related brain potentials (ERPs) elicited by grammatical number violations as individuals read sentences for comprehension were analyzed. Violations were found to elicit a P600 of equal amplitude and latency regardless of an individual's age. Instead, advancing age was associated with a change in the scalp distribution of the P600 effect, being less asymmetric and more frontal (though still with a parietal maximum) in older than younger adults. Our results thus show that the brain's response to simple syntactic violations, unlike those reported for simple binary categorizations and simple semantic violations, is neither slowed nor diminished in amplitude by age. At the same time, the brain's processing of these grammatical number violations did engage at least somewhat different brain regions as a function of age, suggesting a qualitative change rather than any simple quantitative change in speed of processing.

  18. A study on the polymer catalyst process technology

    Energy Technology Data Exchange (ETDEWEB)

    Chung, H.; Lee, H. S.; Ahn, D. H.; Kim, K. R.; Kang, H. S.; Paek, S. W.; Lee, S. H.; Sung, K. W.

    1997-06-01

    Heavy water is used as moderator and coolant in Pressurized Heavy Water Power Plants. According to the governmental long-term plan for power supply Korea is scheduled to construct and operate total four pressurized heavy water power plant till the year 1999. Total heavy water make-up for these plants would be 18 Mg/a from the year 1999. Reformed hydrogen processes is considered best suited to Korea. Polymer catalysts for this process were manufactured and the performance of hydrogen isotope exchange was investigated. The overall mass transfer coefficients varied between 0.004 and 2.295 m{sup 3}.HD/m{sup 3} Bed.sec. and heavy water separation process using the catalysis were optimized. (author). 102 refs., 134 tabs., 65 figs.

  19. Experimental study on laser shock processing of brass

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Laser shock processing (LSP) is a new surface treatment technique for improving hardness, wear resistance, and fatigue.In this paper, basic theories were introduced and the influence of laser pulse intensity on the laser shock processing of brass specimens was investigated by experiments. Microhardness, roughness, microstructure, wear resistance, friction coefficient evolution, and residual stress were examined with different laser pulse intensities of LSP. The results show that the microhardness increases after LSP treatment, and the higher the pulse intensity, the higher the microhardness. Though the microstructure shows no remarkable change, the roughness and wear resistance increase with the increase in pulse density. Laser shock processing has great potential as a means to improve the mechanical properties of components.

  20. The mat study: global insight into the medication administration process.

    Science.gov (United States)

    Elganzouri, Erika; Standish, Cynthia; Androwich, Ida

    2009-01-01

    An important aspect of global patient safety that has recently become a focal topic is preventing adverse drug events. As many as 7,000 patients die every year as a result of medication errors. (1) According to Bates, Spell, & Cullen, adverse drug events can cost up to an average of $8.4 million per year in a 700 bed hospital, not including injury to patient or malpractice costs. (2) Errors can occur throughout the process of ordering a medicine, dispensing, retrieving, and administrating process. Safety measures have been implemented for physicians prescribing medication and pharmacists dispensing medication through MARs and CPOE. However, there is no safety net for nursing. Bar coding can offer that safety net and allow the nurse to verify "the five rights" of medication administration electronically. However, prior to implementation of a bar coding medication system (BCMA), it is important for an institution to gain full understanding of its current nursing work flow during the medication administration process.

  1. Study on the numerical simulation of batch sieving process

    Institute of Scientific and Technical Information of China (English)

    JIAO Hong-guang; MA Jiao; ZHAO Yue-min; CHEN Lun-jian

    2006-01-01

    Screening was widely used in many sectors of industry. However, it is rather incomplete to the cognition of the sieving process for us due to the daedal separation process involving interactions of thousands of particulates. To address this problem, two dimensional numerical simulation of batch sieving process was performed by adopting advanced discrete element method (DEM), which is one of the highly nonlinear digitized dynamic simulative methods and can be used to reveal the quantitative change from particle dimension level. DEM simulation results show that the jam phenomena of sieve-plate apertures of the "blinding particles" in the screen feed can be demonstrated vividly and results also reveal that the velocity of particle moving on the screen plate will vary along with the screen length. This conclusion will be helpful to the design and operation of screen.

  2. A Study on Numerical Simulation of Core-Shooting Process

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    In order to evaluate the main factors influencing the core-shooting process and to optimize the design of core boxes, the fluid-particle (air-sand) model has been built based on the two-phase flow theory. The fluid phase, air, and the particulate phase, sand granules, have been treated as a continuum. By using this model, it is possible to simulate the flow and compaction behavior of sand particles during the core-shooting process. To benchmark the calculated results, the shooting process has been recorded with a digital high speed camera, and the inlet condition of sand particles has also been achieved by using the camera. The preliminary results have showed that the calculation is in agreement with the testing results.

  3. Accreditation and improvement in process quality: A nationwide study

    DEFF Research Database (Denmark)

    Bie Bogh, Søren; Hollnagel, Erik; Johnsen, Søren P;

    Objectives: To examine the development in process quality related to stroke, heart failure and ulcer (bleeding and perforated) between accredited and non-accredited hospitals. Method: All Danish hospitals which treated patients with stroke or heart failure during 2004-2008 or treated patients...... with bleeding or perforated ulcer during 2006-2008 were included. The hospitals were categorized in two groups, non-accredited hospitals (i.e., hospitals not participating in an accreditation program) and hospitals accredited either by Joint Commission International or Health Quality Service. Individual......-level processes of care data was obtained from national population-based registries. The accredited and non-accredited hospitals were compared using 20 processes of care indicators reflecting hospital compliance with national clinical guidelines. The 20 indicators included seven indicators for stroke, seven...

  4. [Study on modern processing technologies of aconiti kusnezoffii radix].

    Science.gov (United States)

    Lin, Hua; Deng, Guang-hai; Gong, You-ming

    2014-07-01

    To compare different processing technologies of Aconiti Kusnezoffii Radix, and to optimize a kind of "low toxicity and high efficiency", simple and practical processing technology for Aconiti Kusnezoffii Radix. HPLC method was used to determine the content of six kinds of alkaloids, and titration method to determine the content of total alkaloids. These contents combined with production were used to evaluate the modern processing technologies of Aconiti Kusnezoffii Radix. There was serious drain of Aconitum alkaloids after treated by soaking, and the loss rates of the content of monoester alkaloids, diester alkaloids and total alkaloid were 20.97%, 31.13% and 14.57%, respectively. The content of alkaloids could maximize the retention using wetting method, the best methods for reducing poison were atmospheric pressure and high pressure steaming cooking methods, and its total diester alkaloids content was too low to be detected, the contents of alkaloids in samples of two kinds of high-temperature baking were 0.6903 mg/g and 0.5575 mg/g, which were higher than the requirement of Chinese Pharmacopoeia. The content of monoester alkaloids was 0.6336 - 2.2721 mg/g of 10 kinds of processing technologies, between which there were nine kinds of processing technologies beyong the Chinese Pharmacopoeia requirement of 0.7 mg/g, while the total alkaloids content was 7.8019 - 11.2078 mg/g. The best method for reducing poison is high-pressure steaming, whose content of diester alkaloids can reach the Chinese Pharmacopoeia requirement after treatment of wet autoclaved products, with higher content of total alkaloids. It is simple, controllable, and suitable for processing of Aconiti Kusnezoffii Radix.

  5. Experimental process development and aerospace alloy formability studies for hydroforming

    Science.gov (United States)

    Mojarad Farimani, Saeed

    In tube hydroforming process, a pressurized liquid is used to expand a thin walled tube inside a closed die in order to fill the die cavity. Tube hydroforming has many advantages that make it interesting for different industries such as automotive and aerospace, but due to the effects of different factors, such as formability of the material, load path (end feeding force and internal pressure during the process), tool geometry and friction, it is a quite complex manufacturing process. Therefore, finite element simulation along with optimization methods can significantly reduce the cost of trial and error approach used in conventional manufacturing methods. In this work, to investigate the effects of different process parameters such as friction condition, tube thickness and end feeding on the final product, tube hydroforming experiments were performed using a round to square-shape die. Experiments were performed on stainless steel 321 tubes with 50.8 mm (2 in) diameter and two different thicknesses; 0.9 mm and 1.2 mm. Experimental load paths were obtained via the data acquisition system of the hydroforming press, which is fully instrumented. An automated deformation measurement system, Argus, was used to measure the strains on the hydroformed tubes. Data collected from the initial experiments were used to simulate and then optimize the process. The process was simulated and optimized using Ls-Dyna and Ls-Opt software, respectively. Strains and thickness variations measured from experiments were compared to FE simulation results at critical sections. The comparison of the results from FE simulations and experiments were in good agreement, indicating that the approach can be used for predicting the final shape and thickness variations of the hydroformed parts for aerospace applications.

  6. Mercury Phase II Study - Mercury Behavior in Salt Processing Flowsheet

    Energy Technology Data Exchange (ETDEWEB)

    Jain, V. [Savannah River Remediation, LLC., Aiken, SC (United States); Shah, H. [Savannah River Remediation, LLC., Aiken, SC (United States). Sludge and Salt Planning; Bannochie, C. J. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Wilmarth, W. R. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

    2016-07-25

    Mercury (Hg) in the Savannah River Site Liquid Waste System (LWS) originated from decades of canyon processing where it was used as a catalyst for dissolving the aluminum cladding of reactor fuel. Approximately 60 metric tons of mercury is currently present throughout the LWS. Mercury has long been a consideration in the LWS, from both hazard and processing perspectives. In February 2015, a Mercury Program Team was established at the request of the Department of Energy to develop a comprehensive action plan for long-term management and removal of mercury. Evaluation was focused in two Phases. Phase I activities assessed the Liquid Waste inventory and chemical processing behavior using a system-by-system review methodology, and determined the speciation of the different mercury forms (Hg+, Hg++, elemental Hg, organomercury, and soluble versus insoluble mercury) within the LWS. Phase II activities are building on the Phase I activities, and results of the LWS flowsheet evaluations will be summarized in three reports: Mercury Behavior in the Salt Processing Flowsheet (i.e. this report); Mercury Behavior in the Defense Waste Processing Facility (DWPF) Flowsheet; and Mercury behavior in the Tank Farm Flowsheet (Evaporator Operations). The evaluation of the mercury behavior in the salt processing flowsheet indicates, inter alia, the following: (1) In the assembled Salt Batches 7, 8 and 9 in Tank 21, the total mercury is mostly soluble with methylmercury (MHg) contributing over 50% of the total mercury. Based on the analyses of samples from 2H Evaporator feed and drop tanks (Tanks 38/43), the source of MHg in Salt Batches 7, 8 and 9 can be attributed to the 2H evaporator concentrate used in assembling the salt batches. The 2H Evaporator is used to evaporate DWPF recycle water. (2) Comparison of data between Tank 21/49, Salt Solution Feed Tank (SSFT), Decontaminated Salt Solution Hold Tank (DSSHT), and Tank 50 samples suggests that the total mercury as well as speciated

  7. Nitrogen Trifluoride-Based Fluoride- Volatility Separations Process: Initial Studies

    Energy Technology Data Exchange (ETDEWEB)

    McNamara, Bruce K.; Scheele, Randall D.; Casella, Andrew M.; Kozelisky, Anne E.

    2011-09-28

    This document describes the results of our investigations on the potential use of nitrogen trifluoride as the fluorinating and oxidizing agent in fluoride volatility-based used nuclear fuel reprocessing. The conceptual process uses differences in reaction temperatures between nitrogen trifluoride and fuel constituents that produce volatile fluorides to achieve separations and recover valuable constituents. We provide results from our thermodynamic evaluations, thermo-analytical experiments, kinetic models, and provide a preliminary process flowsheet. The evaluations found that nitrogen trifluoride can effectively produce volatile fluorides at different temperatures dependent on the fuel constituent.

  8. Experimental Study on Minimization of Sludge Production by Ozonation Process

    Institute of Scientific and Technical Information of China (English)

    何圣兵; 薛罡; 王宝贞; 王琳

    2003-01-01

    Based on the hypothesis of reducing sludge production under cryptic growth conditions, ozone was used as cell lysis agent to treat excess sludge,and then the ozonated supernatant was returned to the aeration tank. The results show that COD and NH+4-N removal efficiencies in ozonation process were 87.96% and 84.42%, respectively. Meanwhile, a low excess sludge yield coefficient of 0. 113 ( g SS/g COD removed) was obtained. Compared with that of the control test, the process configuration decreased the excess sludge production by 51.3%.

  9. Dynamic study on the transformation process of gold nanoclusters.

    Science.gov (United States)

    Ma, Xiaoqian; Wen, Xiaoming; Toh, Yon-Rui; Huang, Kuo-Yen; Tang, Jau; Yu, Pyng

    2014-11-01

    In this paper, the transformation process from Au8 to Au25 nanoclusters (NCs) is investigated with steady state fluorescence spectroscopy and time-resolved fluorescence spectroscopy at various reaction temperatures and solvent diffusivities. Results demonstrate that Au8 NCs, protected by bovine serum albumin, transform into Au25 NCs under controlled pH values through an endothermic reaction with the activation energy of 74 kJ mol(-1). Meanwhile, the characteristic s-shaped curves describing the formation of Au25 NCs suggest this process involves a diffusion controlled growth mechanism.

  10. Particle sizing in rocket motor studies utilizing hologram image processing

    Science.gov (United States)

    Netzer, David; Powers, John

    1987-01-01

    A technique of obtaining particle size information from holograms of combustion products is described. The holograms are obtained with a pulsed ruby laser through windows in a combustion chamber. The reconstruction is done with a krypton laser with the real image being viewed through a microscope. The particle size information is measured with a Quantimet 720 image processing system which can discriminate various features and perform measurements of the portions of interest in the image. Various problems that arise in the technique are discussed, especially those that are a consequence of the speckle due to the diffuse illumination used in the recording process.

  11. Multiwavelength micropulse lidar in atmospheric aerosol study: signal processing

    Science.gov (United States)

    Posyniak, Michal; Malinowski, Szymon P.; Stacewicz, Tadeusz; Markowicz, Krzysztof M.; Zielinski, Tymon; Petelski, Tomasz; Makuch, Przemyslaw

    2011-11-01

    Multiwavelength micropulse lidar (MML) designed for continuous optical sounding of the atmosphere is presented. A specific signal processing technique applying two directional Kalman filtering is introduced in order to enhance signal to noise ratio. Application of this technique is illustrated with profiles collected in course of COAST 2009 and WRNP 2010 research campaigns.

  12. Advancing e-commerce personalization: Process framework and case study

    NARCIS (Netherlands)

    Kaptein, M.C.; Parvinen, P.

    2015-01-01

    Personalization is widely used in e-commerce, and as computational power increases, personalization is now within reach for many online vendors. We describe a process framework to structure our knowledge of online personalization both from academia and from applied attempts. This framework is expect

  13. Three Case Studies on Business Collaboration and Process Management

    Science.gov (United States)

    Fan, Shaokun

    2012-01-01

    The importance of collaboration has been recognized for more than 2000 years. While recent improvement in technology creates vast opportunities for collaboration, effective collaboration remains challenging as ad hoc teams work across time, geographical, language, and technical boundaries, and suffer from process inefficiency. My dissertation…

  14. Cogeneration Technology Alternatives Study (CTAS). Volume 3: Industrial processes

    Science.gov (United States)

    Palmer, W. B.; Gerlaugh, H. E.; Priestley, R. R.

    1980-01-01

    Cogenerating electric power and process heat in single energy conversion systems rather than separately in utility plants and in process boilers is examined in terms of cost savings. The use of various advanced energy conversion systems are examined and compared with each other and with current technology systems for their savings in fuel energy, costs, and emissions in individual plants and on a national level. About fifty industrial processes from the target energy consuming sectors were used as a basis for matching a similar number of energy conversion systems that are considered as candidate which can be made available by the 1985 to 2000 time period. The sectors considered included food, textiles, lumber, paper, chemicals, petroleum, glass, and primary metals. The energy conversion systems included steam and gas turbines, diesels, thermionics, stirling, closed cycle and steam injected gas turbines, and fuel cells. Fuels considered were coal, both coal and petroleum based residual and distillate liquid fuels, and low Btu gas obtained through the on site gasification of coal. An attempt was made to use consistent assumptions and a consistent set of ground rules specified by NASA for determining performance and cost. Data and narrative descriptions of the industrial processes are given.

  15. a Numerical Study of Precipitation Processes in Stable Orographic Storms

    Science.gov (United States)

    Oolman, Larry David

    A numerical model has been developed to retrieve the microphysical and precipitation process of clouds utilizing the kinematic fields obtained from Doppler radar. This model uses parameterized bulk microphysics in which the water condensate is divided into three classes: cloud water, rain, and snow. The model was applied to a deep, stable orographic storm over the Sierra Nevada. The simulations indicated that these storms precipitate with a 90% efficiency. The time scale for a parcel to traverse the barrier is sufficiently long for precipitation processes to be effective. Modifying parameters in the model merely shifts the relative importance of various processes and has little effect on the precipitation efficiency. Only by shortening the parcel transit time, such as by increasing the wind velocity, does the precipitation efficiency decrease. The predicted ice particle spectra from the model agree quite well with the actual spectra from the Wyoming King Air aircraft through most of the interior of the cloud. The spectra does not agree as well near the cloud edges. Entrainment, which was not included in the model, may be an important process in these regions.

  16. Study of pulse mode of processing of the thermoplastic target

    Directory of Open Access Journals (Sweden)

    M. V. Derenovskii

    1983-12-01

    Full Text Available The temperature characteristics and parameters of the relief formation process of thermoplastic target in pulse mode of treatment of target. It was demonstrated the effect on the light transmission characteristics of the material amount of post-erase cycles.

  17. The Process of Mentoring Pregnant Adolescents: An Exploratory Study.

    Science.gov (United States)

    Blinn-Pike, Lynn; Kuschel, Diane; McDaniel, Annette; Mingus, Suzanne; Mutti, Megan Poole

    1998-01-01

    The process that occurs in relationships between volunteer adult mentors and pregnant adolescent "mentees" is described empirically; testable hypotheses based on findings concerning the mentor role are proposed. Case records from 20 mentors are analyzed; findings regarding mentors' roles are discussed. Criteria for conceptualizing quasi-parenting…

  18. Sustainability Indicators for Chemical Processes: III. Biodiesel Case Study

    Science.gov (United States)

    The chemical industry is one of the most important business sectors, not only economically, but also societally; as it allows humanity to attain higher standards and quality of life. Simultaneously, chemical products and processes can be the origin of potential human health and ...

  19. Advancing e-commerce personalization : Process framework and case study

    NARCIS (Netherlands)

    Kaptein, Maurits; Parvinen, Petri

    2015-01-01

    Personalization is widely used in e-commerce, and as computational power increases, personalization is now within reach for many online vendors. We describe a process framework to structure our knowledge of online personalization —both from academia and from applied attempts. This framework is

  20. Advancing e-commerce personalization: Process framework and case study

    NARCIS (Netherlands)

    Kaptein, M.C.; Parvinen, P.

    2015-01-01

    Personalization is widely used in e-commerce, and as computational power increases, personalization is now within reach for many online vendors. We describe a process framework to structure our knowledge of online personalization both from academia and from applied attempts. This framework is

  1. Waste management study: Process development at Lawrence Livermore National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    1984-12-01

    This report presents the results of an evaluation of the present Toxic Waste Control Operations at the Lawrence Livermore National Laboratory, evaluates the technologies most applicable to the treatment of toxic and hazardous wastes and presents conceptual designs of processes for the installation of a new decontamination and waste treatment facility (DWTF) for future treatment of these wastes.

  2. A Case Study of How Teaching Practice Process Takes Place

    Science.gov (United States)

    Yalin Ucar, Meltem

    2012-01-01

    The process of "learning" carries an important role in the teaching practice which provides teacher candidates with professional development. Being responsible for the learning experiences in that level, cooperating teacher, teacher candidate, mentor and practice school are the important variables which determine the quality of the teaching…

  3. Advancing e-commerce personalization : Process framework and case study

    NARCIS (Netherlands)

    Kaptein, Maurits; Parvinen, Petri

    2015-01-01

    Personalization is widely used in e-commerce, and as computational power increases, personalization is now within reach for many online vendors. We describe a process framework to structure our knowledge of online personalization —both from academia and from applied attempts. This framework is expec

  4. Advancing e-commerce personalization: Process framework and case study

    NARCIS (Netherlands)

    Kaptein, M.C.; Parvinen, P.

    2015-01-01

    Personalization is widely used in e-commerce, and as computational power increases, personalization is now within reach for many online vendors. We describe a process framework to structure our knowledge of online personalization both from academia and from applied attempts. This framework is expect

  5. Unpacking the Evaluation Process: A Study of Transitional Bilingual Education

    Science.gov (United States)

    Hofstetter, C.H.

    2004-01-01

    This article examines the process of an ongoing, independent evaluation of atransitional Spanish/English bilingual program housed at a large, urban school district in Northern California. The program is designed to enhance Kindergarten through Grade 5 (K-5) students' English language proficiency, as well as their English performance in academic…

  6. NATO/CCMS PILOT STUDY - CLEAN PRODUCTS AND PROCESSES

    Science.gov (United States)

    The proposed objective of the NATO/CCMS Pilot on clean products and processes is to facilitate further gains in pollution prevention, waste minimization, and design for the environment. It is anticipated that the free exchange of knowledge, experience, data, and models will fost...

  7. Face Context Influences Local Part Processing: An ERP Study.

    Science.gov (United States)

    Zhang, Hong; Sun, Yaoru; Zhao, Lun

    2017-01-01

    Perception of face parts on the basis of features is thought to be different from perception of whole faces, which is more based on configural information. Face context is also suggested to play an important role in face processing. To investigate how face context influences the early-stage perception of facial local parts, we used an oddball paradigm that tested perceptual stages of face processing rather than recognition. We recorded the event-related potentials (ERPs) elicited by whole faces and face parts presented in four conditions (upright-normal, upright-thatcherised, inverted-normal and inverted-thatcherised), as well as the ERPs elicited by non-face objects (whole houses and house parts) with corresponding conditions. The results showed that face context significantly affected the N170 with increased amplitudes and earlier peak latency for upright normal faces. Removing face context delayed the P1 latency but did not affect the P1 amplitude prominently for both upright and inverted normal faces. Across all conditions, neither the N170 nor the P1 was modulated by house context. The significant changes on the N170 and P1 components revealed that face context influences local part processing at the early stage of face processing and this context effect might be specific for face perception. We further suggested that perceptions of whole faces and face parts are functionally distinguished.

  8. Process development studies of the bioconversion of cellulose and production of ethanol. Semi annual report

    Energy Technology Data Exchange (ETDEWEB)

    Wilke, C.R.; Blanch, H.W.

    1981-04-01

    Progress in the following process development studio is reported: economic evaluation of hydrolysis and ethanol fermentation schemes, economic evaluation of alternative fermentation processes, raw materials evaluation, and evaluation of pretreatment process. Microbiological and enzymatic studies reported are: production of cellulase enzyme from high yielding mutants, hydrolysis reactor development, xylose fermentation, and xylanese production. Fermentation and separation processes include: process development studies on vacuum fermentation and distillation, evaluation of low energy separations processes, large scale hollow fiber reactor development. (MHR)

  9. Fuzzy forecasting based on two-factors second-order fuzzy-trend logical relationship groups and particle swarm optimization techniques.

    Science.gov (United States)

    Chen, Shyi-Ming; Manalu, Gandhi Maruli Tua; Pan, Jeng-Shyang; Liu, Hsiang-Chuan

    2013-06-01

    In this paper, we present a new method for fuzzy forecasting based on two-factors second-order fuzzy-trend logical relationship groups and particle swarm optimization (PSO) techniques. First, we fuzzify the historical training data of the main factor and the secondary factor, respectively, to form two-factors second-order fuzzy logical relationships. Then, we group the two-factors second-order fuzzy logical relationships into two-factors second-order fuzzy-trend logical relationship groups. Then, we obtain the optimal weighting vector for each fuzzy-trend logical relationship group by using PSO techniques to perform the forecasting. We also apply the proposed method to forecast the Taiwan Stock Exchange Capitalization Weighted Stock Index and the NTD/USD exchange rates. The experimental results show that the proposed method gets better forecasting performance than the existing methods.

  10. Summary of some feasibility studies for site-specific solar industrial process heat

    Energy Technology Data Exchange (ETDEWEB)

    None

    1982-01-01

    Some feasibility studies for several different site specific solar industrial process heat applications are summarized. The followng applications are examined. Leather Tanning; Concrete Production: Lumber and Paper Processing; Milk Processing; Molding, Curing or Drying; Automobile Manufacture; and Food Processing and Preparation. For each application, site and process data, system design, and performance and cost estimates are summarized.

  11. Mercury Phase II Study - Mercury Behavior in Salt Processing Flowsheet

    Energy Technology Data Exchange (ETDEWEB)

    Jain, V. [Savannah River Remediation, LLC., Aiken, SC (United States); Shah, H. [Savannah River Remediation, LLC., Aiken, SC (United States). Sludge and Salt Planning; Bannochie, C. J. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Wilmarth, W. R. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

    2016-07-25

    Mercury (Hg) in the Savannah River Site Liquid Waste System (LWS) originated from decades of canyon processing where it was used as a catalyst for dissolving the aluminum cladding of reactor fuel. Approximately 60 metric tons of mercury is currently present throughout the LWS. Mercury has long been a consideration in the LWS, from both hazard and processing perspectives. In February 2015, a Mercury Program Team was established at the request of the Department of Energy to develop a comprehensive action plan for long term management and removal of mercury. Evaluation was focused in two Phases. Phase I activities assessed the Liquid Waste inventory and chemical processing behavior using a system by system review methodology and determined the speciation of the different mercury forms (Hg+, Hg++, elemental Hg, organomercury, and soluble versus insoluble mercury) within the LWS. The evaluation of the mercury behavior in the salt processing flowsheet indicates: • In the assembled Salt Batches 7, 8 and 9 in Tank 21, the total mercury is mostly soluble with methylmercury (MHg) contributing over 50% of the total mercury. Based on the analyses of samples from 2H Evaporator feed and drop tanks (Tanks 38/43), the source of MHg in Salt Batches 7, 8 and 9 can be attributed to the 2H evaporator concentrate used in assembling the salt batches. The 2H Evaporator is used to evaporate DWPF recycle water. • Comparison of data between Tank 21/49, Salt Solution Feed Tank (SSFT), Decontaminated Salt Solution Hold Tank (DSSHT), and Tank 50 samples suggests that the total mercury as well as speciated forms in the assembled salt batches in Tanks 21/49 pass through the Actinide Removal Process (ARP) / Modular Caustic Side Solvent Extraction Unit (MCU) process to Tank 50 with no significant change in the mercury chemistry. • In Tank 50, Decontaminated Salt Solution (DSS) from ARP/MCU is the major contributor to the total mercury including MHg. More information can be found about what

  12. Distributed Processing of Projections of Large Datasets: A Preliminary Study

    Science.gov (United States)

    Maddox, Brian G.

    2004-01-01

    Modern information needs have resulted in very large amounts of data being used in geographic information systems. Problems arise when trying to project these data in a reasonable amount of time and accuracy, however. Current single-threaded methods can suffer from two problems: fast projection with poor accuracy, or accurate projection with long processing time. A possible solution may be to combine accurate interpolation methods and distributed processing algorithms to quickly and accurately convert digital geospatial data between coordinate systems. Modern technology has made it possible to construct systems, such as Beowulf clusters, for a low cost and provide access to supercomputer-class technology. Combining these techniques may result in the ability to use large amounts of geographic data in time-critical situations.

  13. In situ studies of microbial inactivation during high pressure processing

    Science.gov (United States)

    Maldonado, Jose Antonio; Schaffner, Donald W.; Cuitiño, Alberto M.; Karwe, Mukund V.

    2016-01-01

    High pressure processing (HPP) has been shown to reduce microbial concentration in foods. The mechanisms of microbial inactivation by HPP have been associated with damage to cell membranes. The real-time response of bacteria to HPP was measured to elucidate the mechanisms of inactivation, which can aid in designing more effective processes. Different pressure cycling conditions were used to expose Enterobacter aerogenes cells to HPP. Propidium iodide (PI) was used as a probe, which fluoresces after penetrating cells with damaged membranes and binding with nucleic acids. A HPP vessel with sapphire windows was used for measuring fluorescence in situ. Membrane damage was detected during pressurization and hold time, but not during depressurization. The drop in fluorescence was larger than expected after pressure cycles at higher pressure and longer times. This indicated possible reversible disassociation of ribosomes resulting in additional binding of PI to exposed RNA under pressure and its release after depressurization.

  14. Study of CMOS integrated signal processing circuit in capacitive sensors

    Institute of Scientific and Technical Information of China (English)

    CAO Yi-jiang; YU Xiang; WANG Lei

    2007-01-01

    A CMOS integrated signal processing circuit based on capacitance resonance principle whose structure is simple in capacitive sensors is designed. The waveform of output voltage is improved by choosing bootstrap reference current mirror with initiate circuit, CMOS analogy switch and positive feedback of double-stage inverter in the circuit. Output voltage of this circuit is a symmetric square wave signal. The variation of sensitive capacitance, which is part of the capacitive sensors, can be denoted by the change of output voltage's frequency. The whole circuit is designed with 1.5 μm P-well CMOS process and simulated by PSpice software.Output frequency varies from 261.05 kHz to 47.93 kHz if capacitance varies in the range of 1PF~15PF. And the variation of frequency can be easily detected using counter or SCU.

  15. An experimental study of high-hydrogen welding processes

    Energy Technology Data Exchange (ETDEWEB)

    Fydrych, D.; Labonowski, J.

    2015-07-01

    This paper presents investigation results of determination of the diffusible hydrogen content in deposited metal obtained by means of two most often used methods-the glycerin method and the mercury method. Relation has been defined between results of those methods in the area characteristic of low-hydrogen as well as high-hydrogen welding processes. Relations available in the literature do not include the diffusible hydrogen content in deposited metal greater than 35 ml/100 g. Extending the scope of analysis of the diffusible hydrogen quantity to an 80 ml/100 g level considerably simplifies carrying out the steel weldability assessment with the use of high-hydrogen processes and with welding in water environment. (Author)

  16. Mental fatigue impairs pre-attentive processing: a MMN study.

    Science.gov (United States)

    Yang, Bo; Xiao, Wei; Liu, Xufeng; Wu, Shengjun; Miao, Danmin

    2013-01-04

    Individuals frequently experience mental fatigue during or after prolonged periods of cognitive activity. We investigated the effects of mental fatigue on the ability to detect minor changes in the pre-attentive stage of information processing by recoding MMN of ERP components. The equal probable paradigm was employed to elicit pure memory-comparison-based MMN component. Mental fatigue was induced by the continuous performance for 2h of mental arithmetic tasks. MMN amplitudes at fronto-central electrode sites were significantly decreased in subjects with mental fatigue than in subjects under control conditions, whereas temporal MMN was not affected by mental fatigue. These results suggest that mental fatigue impairs pre-attentive processing.

  17. Experimental study of digital image processing techniques for LANDSAT data

    Science.gov (United States)

    Rifman, S. S. (Principal Investigator); Allendoerfer, W. B.; Caron, R. H.; Pemberton, L. J.; Mckinnon, D. M.; Polanski, G.; Simon, K. W.

    1976-01-01

    The author has identified the following significant results. Results are reported for: (1) subscene registration, (2) full scene rectification and registration, (3) resampling techniques, (4) and ground control point (GCP) extraction. Subscenes (354 pixels x 234 lines) were registered to approximately 1/4 pixel accuracy and evaluated by change detection imagery for three cases: (1) bulk data registration, (2) precision correction of a reference subscene using GCP data, and (3) independently precision processed subscenes. Full scene rectification and registration results were evaluated by using a correlation technique to measure registration errors of 0.3 pixel rms thoughout the full scene. Resampling evaluations of nearest neighbor and TRW cubic convolution processed data included change detection imagery and feature classification. Resampled data were also evaluated for an MSS scene containing specular solar reflections.

  18. Numerical studies of the metamodel fitting and validation processes

    OpenAIRE

    Iooss, Bertrand; Boussouf, Loïc; Feuillard, Vincent; Marrel, Amandine

    2010-01-01

    Complex computer codes, for instance simulating physical phenomena, are often too time expensive to be directly used to perform uncertainty, sensitivity, optimization and robustness analyses. A widely accepted method to circumvent this problem consists in replacing cpu time expensive computer models by cpu inexpensive mathematical functions, called metamodels. In this paper, we focus on the Gaussian process metamodel and two essential steps of its definition phase. First, the initial design o...

  19. Process improvement in ICT services purchasing : Case study: Posti Oy

    OpenAIRE

    2016-01-01

    This thesis is about purchasing ICT services and the empirical research is made for Posti Oy. The aim of the research is to describe present ICT services purchasing procedures in theory and in practice in Posti Oy, and also to give recommendations for improvement of the ICT services purchasing process in Posti Oy. The research includes mainly recent theory of ICT services purchasing and is not adaptable to any other type of service purchasing since service purchasing types differ between ...

  20. Block diagrams for the study of some endocrine processes.

    Science.gov (United States)

    Derevenco, P; Vincze, J

    1977-01-01

    With the help of bibliographical data and contributions of the authors two block diagrams have been built. These block diagrams are scheming two processes connected with the exposure of the organism to a moderate physical exercise: (a) the control of the release and the effect of ACTH (b) the control of the release and effect of STH. Some practical conclusion can be drawn regarding the interpretation of the endocrine modifications during exercise including those during standard functional tests.

  1. A magnetoencephalography study of visual processing of pain anticipation.

    Science.gov (United States)

    Machado, Andre G; Gopalakrishnan, Raghavan; Plow, Ela B; Burgess, Richard C; Mosher, John C

    2014-07-15

    Anticipating pain is important for avoiding injury; however, in chronic pain patients, anticipatory behavior can become maladaptive, leading to sensitization and limiting function. Knowledge of networks involved in pain anticipation and conditioning over time could help devise novel, better-targeted therapies. With the use of magnetoencephalography, we evaluated in 10 healthy subjects the neural processing of pain anticipation. Anticipatory cortical activity elicited by consecutive visual cues that signified imminent painful stimulus was compared with cues signifying nonpainful and no stimulus. We found that the neural processing of visually evoked pain anticipation involves the primary visual cortex along with cingulate and frontal regions. Visual cortex could quickly and independently encode and discriminate between visual cues associated with pain anticipation and no pain during preconscious phases following object presentation. When evaluating the effect of task repetition on participating cortical areas, we found that activity of prefrontal and cingulate regions was mostly prominent early on when subjects were still naive to a cue's contextual meaning. Visual cortical activity was significant throughout later phases. Although visual cortex may precisely and time efficiently decode cues anticipating pain or no pain, prefrontal areas establish the context associated with each cue. These findings have important implications toward processes involved in pain anticipation and maladaptive pain conditioning.

  2. Modality-specific processing precedes amodal linguistic processing during L2 sign language acquisition: A longitudinal study.

    Science.gov (United States)

    Williams, Joshua T; Darcy, Isabelle; Newman, Sharlene D

    2016-02-01

    The present study tracked activation pattern differences in response to sign language processing by late hearing second language learners of American Sign Language. Learners were scanned before the start of their language courses. They were scanned again after their first semester of instruction and their second, for a total of 10 months of instruction. The study aimed to characterize modality-specific to modality-general processing throughout the acquisition of sign language. Results indicated that before the acquisition of sign language, neural substrates related to modality-specific processing were present. After approximately 45 h of instruction, the learners transitioned into processing signs on a phonological basis (e.g., supramarginal gyrus, putamen). After one more semester of input, learners transitioned once more to a lexico-semantic processing stage (e.g., left inferior frontal gyrus) at which language control mechanisms (e.g., left caudate, cingulate gyrus) were activated. During these transitional steps right hemispheric recruitment was observed, with increasing left-lateralization, which is similar to other native signers and L2 learners of spoken language; however, specialization for sign language processing with activation in the inferior parietal lobule (i.e., angular gyrus), even for late learners, was observed. As such, the present study is the first to track L2 acquisition of sign language learners in order to characterize modality-independent and modality-specific mechanisms for bilingual language processing. Copyright © 2015 Elsevier Ltd. All rights reserved.

  3. What Are the Learning Approaches Applied by Undergraduate Students in English Process Writing Based on Gender?

    Science.gov (United States)

    Veloo, Arsaythamby; Krishnasamy, Hariharan N.; Harun, Hana Mulyani

    2015-01-01

    The purpose of this study is to determine gender differences and type of learning approaches among Universiti Utara Malaysia (UUM) undergraduate students in English writing performance. The study involved 241 (32.8% male & 67.2% female) undergraduate students of UUM who were taking the Process Writing course. This study uses a Two-Factor Study…

  4. Studies on Environmentally Friendly Leaching Processes in China

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The newly developed green leaching processes for chromium, lead and gold extraction from ores or concentrates are described. The chromium is extracted from the iron chromite ore with fused sodium hydroxide at 500-550°C as sodium chromate. The galena in lead sulfide concentrate is converted into lead carbonate in ammonium or sodium carbonate solution at 50-80°C followed by the separation of lead carbonate formed from the unconverted sulfide ores by flotation. Gold associated with sulfide ore (such as pyrite and chalcopyrite) can be extracted into sodium thiosulfate solution without any pretreatment such as roasting, high pressure aqueous oxidation or bacteria pre-leaching.

  5. Study of reactive ion etching for reverse tone nanoimprint process

    Energy Technology Data Exchange (ETDEWEB)

    Tsuji, Y; Yanagisawa, M; Yoshinaga, H; Hiratsuka, K, E-mail: tsuji-yukihiro@sei.co.j [Fiber-optics Core Devices R and D Department, Transmission Devices R and D Laboratories, Sumitomo Electric Industries, LTD. 1, Taya-cho, Sakae-ku, Yokohama, Kanagawa, 244-8588 (Japan)

    2009-11-15

    We have used reverse nanoimprint for fabricating diffraction gratings of distributed feedback laser diodes. Generation of residues in the etching process of resin is a serious issue leading to poor line edge roughness of the grating patterns. We have found that the residues are composed of oxide products from Si-containing resin. We have successfully suppressed the generation of the residues by optimizing oxygen partial pressure of reactive ion etching (RIE). We have also succeeded in effectively removing the residues by utilizing sputtering effect of RIE.

  6. Continuous improvement processes using Lean Management tools. A case study

    Directory of Open Access Journals (Sweden)

    Pârv Luminița

    2017-01-01

    Full Text Available The paper describes how Lean Management may be applied in the university setting to improve the management processes. The correlation of didactic, educational and research activities with the stakeholders needs is one of the main objectives of the university. In this respect, an indicator used to analyse a university, for the purposes of fulfilling its mission, respectively for the purposes of streamlining its didactic and scientific activity, is related to the number of graduates on the labour market, acting in their area of specialization. This work presents a best practice of Lean Management at Transilvania University of Brasov, Romania.

  7. Why Process-Orientation is Scarce: An Empirical Study of Process-oriented Information Systems in the Automotive Industry

    NARCIS (Netherlands)

    Mutschler, B.B.; Bumiller, J.; Reichert, M.U.

    2006-01-01

    Several studies have indicated that existing information systems (IS) often fail to provide adequate business process support. To systematically identify the reasons for this drawback, we conducted a case study in the automotive domain and a survey among 79 IT practitioners. This paper presents the

  8. A new, integrated, continuous purification process template for monoclonal antibodies: Process modeling and cost of goods studies.

    Science.gov (United States)

    Xenopoulos, Alex

    2015-11-10

    An evolving biopharmaceutical industry requires advancements in biomanufacturing that offer increased productivity and improved economics without sacrificing process robustness. Accordingly, we have developed a new monoclonal antibody purification template comprised of flocculation-based clarification, capture by continuous multi-column protein A chromatography and flow-through polishing. The new process offers a robust, single-use manufacturing solution while significantly reducing overall cost of goods. Modeling studies verify that the individual clarification, capture and polishing solutions offer significant advantages as stand-alone unit operations. These technologies were also designed to be integrated into a continuous purification template. Process modeling studies have been used to highlight both cost and operational advantages of the new process template. Depending on scale, savings of more than 20% and 60% were seen for commercial and clinical operation, respectively. Integrating the technologies into a continuous process consistently offered additional cost advantages. During template development, process modeling was instrumental in highlighting the importance of identifying technologies that provided high product yield and purification factors. Additionally, high product concentration and eliminating the need for intermediate product dilution emerged as important considerations for newly developed unit operations. Combining experimental work with insights from modeling can significantly improve the outcome of product and process development.

  9. Electronics and Sensor Study with the OKI SOI process

    CERN Document Server

    Arai, Yasuo

    2007-01-01

    While the SOI (Silicon-On-Insulator) device concept is very old, commercialization of the technology is relatively new and growing rapidly in high-speed processor and lowpower applications. Furthermore, features such as latch-up immunity, radiation hardness and high-temperature operation are very attractive in high energy and space applications. Once high-quality bonded SOI wafers became available in the late 90s, it opened up the possibility to get two different kinds of Si on a single wafer. This makes it possible to realize an ideal pixel detector; pairing a fully-depleted radiation sensor with CMOS circuitry in an industrial technology. In 2005 we started Si pixel R&D with OKI Electric Ind. Co., Ltd. which is the first market supplier of Fully-Depleted SOI products. We have developed processes for p+/n+ implants to the substrate and for making connections between the implants and circuits in the OKI 0.15μm FD-SOI CMOS process. We have preformed two Multi Project Wafer (MPW) runs using this SOI proces...

  10. Study on the syhthesis process of tetracaine hydrochloride

    Science.gov (United States)

    Li, Wenli; Zhao, Jie; Cui, Yujie

    2017-05-01

    Tetrachloride hydrochloride is a local anesthetic with long-acting ester, and it is usually present in the form of a hydrochloride salt. Firsleb first synthesized the tetracaine by experiment in 1928, which is one of the recognized clinical potent anesthetics. This medicine has the advantages of stable physical and chemical properties, the rapid role and long maintenance. Tetracaine is also used for ophthalmic surface anesthesia as one of the main local anesthetic just like conduction block anesthesia, mucosal surface anesthesia and epidural anesthesia. So far, the research mainly engaged in its clinical application research, and the research strength is relatively small in the field of synthetic technology. The general cost of the existing production process is high, and the yield is low. In addition, the reaction time is long and the reaction conditions are harsh. In this paper, a new synthetic method was proposed for the synthesis of tetracaine hydrochloride. The reaction route has the advantages of few steps, high yield, short reaction time and mild reaction conditions. The cheap p-nitrobenzoic acid was selected as raw material. By esterification with ethanol and reaction with n-butyraldehyde (the reaction process includes nitro reduction, aldol condensation and hydrogenation reduction), the intermediate was transesterified with dimethylaminoethanol under basic conditions. Finally, the PH value was adjusted in the ethanol solvent. After experiencing 4 steps reaction, the crude tetracaine hydrochloride was obtained.

  11. Experimental study of coal topping process in a downer reactor

    Energy Technology Data Exchange (ETDEWEB)

    Wang, J.G.; Lu, X.S.; Yao, J.X.; Lin, W.G.; Cui, L.J. [Chinese Academy of Science, Beijing (China). Inst. of Processing Engineering

    2005-02-02

    Experiments were carried out in a downer reactor integrated in a circulating fluidized bed combustor to examine the performance of the coal topping process. The effects of reaction temperature and coal particle size on the product distribution and their compositions were determined. The experimental results show that an increase in temperature will increase the yields of gas and liquid product, and the liquid yield decreases with the increase in coal particle size. The experiments exhibit an optimal condition for the liquid product. When the pyrolysis temperature is 660{sup o}C and coal particle size is less than 0.2-8 mm, the yield of light tar (hexane-soluble fraction) reaches 7.5 wt % (dry coal basis). The light tar is composed of acid groups (57.1 wt %), crude gasoline (aliphatics) (12.9 wt %), aromatics (21.4 wt %), and polar and basic groups (8.6 wt %). The experiments indicate that the coal topping process is a promising technology for partially converting coal into liquid fuels and fine chemicals.

  12. Optical studies of dynamical processes in disordered materials

    Energy Technology Data Exchange (ETDEWEB)

    Yen, W.M.

    1991-07-01

    In general terms, our research activities under the present Agency sponsorship continue to focus on processes and interactions which affect the dynamical behavior of excitations/excited states of optically activated amorphous or disordered solids. The framework of our understanding of these processes has been established with work performed over the past two decades. The advent of more refined spectroscopies, most of them laser based, has allowed a re-examination of these properties in a much more detailed and basic way. A deeper understanding of the interactions which lead to relaxation, energy diffusion and nonlinearities in the disordered phases is important to the development of more efficient and better materials to service all of the technologies which employ optically activated materials. In this document, we will present an abbreviated synopsis of the research we have conducted under the auspices of the present grant. We will then outline directions we wish to maintain and will render descriptions of new opportunities which have ensued from our current efforts and which we wish to exploit under renewed sponsorship. 52 refs., 12 figs.

  13. Spectroscopic studies of triethoxysilane sol-gel and coating process.

    Science.gov (United States)

    Li, Ying-Sing; Ba, Abdul

    2008-10-01

    Silica sol-gels have been prepared under different conditions using triethoxysilane (TES) as precursor. The prepared sol-gels have been used to coat aluminum for corrosion protection. Vibrational assignments have been made for most vibration bands of TES, TES sol-gel, TES sol-gel-coated aluminum and xerogel. It has been noticed that air moisture may have helped the hydrolysis of the thin coating films. Xerogels have been obtained from the sol-gel under different temperature conditions and the resulting samples have been characterized by using infrared and Raman spectroscopic methods. IR data indicate that the sol-gel process is incomplete under the ambient conditions although an aqueous condition can have slightly improved the process. Two nonequivalent silicon atoms have been identified from the collected 29Si NMR spectra for the sol-gel, supporting the result derived from the IR data. The frequency of Si-H bending vibration has been found to be more sensitive to the skeletal structure than that of the Si-H stretching vibration. A higher temperature condition could favor the progression of hydrolysis and condensation. A temperature higher than 300 degrees C would cause sample decomposition without seriously damaging the silica network. From infrared intensity measurements and thermo-gravimetric analyses, the fractions of incomplete hydrolysis and condensation species have been estimated to be 4% and 3%, respectively. Electrochemical data have shown that the sol-gel coating significantly improves the corrosion protection properties of aluminum.

  14. INTERDISCURSIVE PROCESSES IN LINGUISTICS AND LITERARY STUDIES: LANGUAGES AND MEDIA IN THE INNOVATION PROCESS OF THE FIELD

    Directory of Open Access Journals (Sweden)

    Rogério Barbosa da Silva

    2013-12-01

    Full Text Available We propose a brief reflection on the interaction between languages ??and media, resulting in a close dialogue between language and technological processes that underlie the historical, and temporal dimensions, but also discursive and audiovisual, especially in poetic interart. Such elements have formed the basis of the discussion held in the discipline Language, Media and Discourse Processes within the Postgraduate in Studies of Languages of CEFET MG

  15. Comments: Should Principal Stratification Be Used to Study Mediational Processes?

    Science.gov (United States)

    VanderWeele, Tyler J.

    2012-01-01

    Principal stratification provides an approach to study the effect of an exposure on an outcome within strata defined by the effect of the exposure on some third, posttreatment, variable (Frangakis & Rubin, 2002). There has been more recent interest in using principal stratification to study the extent to which the effect of an exposure on an…

  16. Fractures of the mandibular coronoid process: a two centres study

    NARCIS (Netherlands)

    Boffano, P.; Kommers, S.C.; Roccia, F.; Gallesio, C.; Forouzanfar, T.

    2014-01-01

    The aim of this study was to assess the characteristics of patients with coronoid fractures treated in two European centres over 10 years and to briefly review the literature. This study is based on 2 systematic computer-assisted databases that have continuously recorded patients hospitalized with m

  17. The Whittard Canyon - A case study of submarine canyon processes

    Science.gov (United States)

    Amaro, T.; Huvenne, V. A. I.; Allcock, A. L.; Aslam, T.; Davies, J. S.; Danovaro, R.; De Stigter, H. C.; Duineveld, G. C. A.; Gambi, C.; Gooday, A. J.; Gunton, L. M.; Hall, R.; Howell, K. L.; Ingels, J.; Kiriakoulakis, K.; Kershaw, C. E.; Lavaleye, M. S. S.; Robert, K.; Stewart, H.; Van Rooij, D.; White, M.; Wilson, A. M.

    2016-08-01

    Submarine canyons are large geomorphological features that incise continental shelves and slopes around the world. They are often suggested to be biodiversity and biomass hotspots, although there is no consensus about this in the literature. Nevertheless, many canyons do host diverse faunal communities but owing to our lack of understanding of the processes shaping and driving this diversity, appropriate management strategies have yet to be developed. Here, we integrate all the current knowledge of one single system, the Whittard Canyon (Celtic Margin, NE Atlantic), including the latest research on its geology, sedimentology, geomorphology, oceanography, ecology, and biodiversity in order to address this issue. The Whittard Canyon is an active system in terms of sediment transport. The net suspended sediment transport is mainly up-canyon causing sedimentary overflow in some upper canyon areas. Occasionally sediment gravity flow events do occur, some possibly the result of anthropogenic activity. However, the role of these intermittent gravity flows in transferring labile organic matter to the deeper regions of the canyon appears to be limited. More likely, any labile organic matter flushed downslope in this way becomes strongly diluted with bulk material and is therefore of little food value for benthic fauna. Instead, the fresh organic matter found in the Whittard Channel mainly arrives through vertical deposition and lateral transport of phytoplankton blooms that occur in the area during spring and summer. The response of the Whittard Canyon fauna to these processes is different in different groups. Foraminiferal abundances are higher in the upper parts of the canyon and on the slope than in the lower canyon. Meiofaunal abundances in the upper and middle part of the canyon are higher than on adjacent slopes, but lower in the deepest part. Mega- and macrofauna abundances are higher in the canyon compared with the adjacent slope and are higher in the eastern than

  18. Study on the Synthesis Process of Dibenzylidene Sorbitol and Derivative

    Institute of Scientific and Technical Information of China (English)

    Li; JiChun

    2001-01-01

    Dibenzylidene Sorbitol (DBS) and Di(P-methylbenzylidene) Sorbitol (P-MeDBS) derivatives, used as crystallinity Polyolefine kind resin transparency nucleating agent, can reduce to a large extent the product's haze, improve its transparency, validly resin's rigidity, heat resistant temperature and modulus of bending. Its good transparency and glossiness are as good as transparent material. It has become polyolefine processing auxiliary that develop most quickly and consume most massively in the world. It is used widely in the processing of transparent plastic package vessel, equipment's parts, file folder and transperene material. The nucleating agent of DBS analog is made from one mole Sorbitol and two mole benzaldehyde dehydration condensation reaction, which associates with by-reaction. Sorbitol containing six hydroxyl group ring condensates with benzaldehyde and yield three acetal compounds-monobenzylidene Sorbitol(hereafier briefly referred to as "MBS”), DBS and Tridibenzylidene Sorbitol(hereafter briefly referred to as "TBS”). MBS and TBS are by-products. The experiment is carried out under the condition of temperature 75'C, reaction time 4 hours and agitation velocity 370 r/min. We conducted intensive research on the effects of Sorbitol/benzaldehyde(S/B) and Sorbitol/P-Me-DBS feeding molar ratios. When B/S is 2, the target product's yield can even be improved to 98.5% and 97.17% respectively, whereas feeding molar ratio are increased or reduced, the product's yield reduces definitely. The reason is that DBS and Derivative are produced by the process that one mole Sorbitol and two mole benzaldehyde condense. Sorbitol can't react validly with the molar ratio being lower than 2 .While B/S is in excess of 2.1, the excess benzaldehyde condenses some yielded DBS and produces TBS. Research data show that feeding molar ratio ought to range from 1.9 to 2.1 in order to acquire high yield and selectivity's target product. The result of synthesizing P-Me-DBS homologue

  19. Study on the Synthesis Process of Dibenzylidene Sorbitol and Derivative

    Institute of Scientific and Technical Information of China (English)

    Li JiChun

    2001-01-01

    @@ Dibenzylidene Sorbitol (DBS) and Di(P-methylbenzylidene) Sorbitol (P-MeDBS) derivatives, used as crystallinity Polyolefine kind resin transparency nucleating agent, can reduce to a large extent the product's haze, improve its transparency, validly resin's rigidity, heat resistant temperature and modulus of bending. Its good transparency and glossiness are as good as transparent material. It has become polyolefine processing auxiliary that develop most quickly and consume most massively in the world. It is used widely in the processing of transparent plastic package vessel, equipment's parts, file folder and transperene material. The nucleating agent of DBS analog is made from one mole Sorbitol and two mole benzaldehyde dehydration condensation reaction, which associates with by-reaction. Sorbitol containing six hydroxyl group ring condensates with benzaldehyde and yield three acetal compounds-monobenzylidene Sorbitol(hereafier briefly referred to as "MBS”), DBS and Tridibenzylidene Sorbitol(hereafter briefly referred to as "TBS”). MBS and TBS are by-products. The experiment is carried out under the condition of temperature 75'C, reaction time 4 hours and agitation velocity 370 r/min. We conducted intensive research on the effects of Sorbitol/benzaldehyde(S/B) and Sorbitol/P-Me-DBS feeding molar ratios. When B/S is 2, the target product's yield can even be improved to 98.5% and 97.17% respectively, whereas feeding molar ratio are increased or reduced, the product's yield reduces definitely. The reason is that DBS and Derivative are produced by the process that one mole Sorbitol and two mole benzaldehyde condense. Sorbitol can't react validly with the molar ratio being lower than 2 .While B/S is in excess of 2.1, the excess benzaldehyde condenses some yielded DBS and produces TBS. Research data show that feeding molar ratio ought to range from 1.9 to 2.1 in order to acquire high yield and selectivity's target product. The result of synthesizing P

  20. Studying Bounds on Lepton Flavor Violating (LFV) Decay Processes

    CERN Document Server

    Aslam, M J

    2002-01-01

    This dissertation reviews the Standard Model formalism as well as the Lepton Flavour Violating (LFV) decay processes which cause its extension, known as the physics beyond the SM. Firstly, using the experimental bounds on three body LFV decays, the corresponding bounds on two body LFV decays are reviewed. The dynamical suppression of three body LFV decays due to momentum dependent couplings is also reviewed. Secondly, the role of the LFV decays to explain the LSND excess is discussed in detail, for which the experimental bounds on three body LFV decays, i.e. \\mu -> 3e are used to constraint the coupling \\tilde{g}_{Z_{\\mu e}}, which is needed to calculate the anomalous muon decay \\mu -> e\

  1. Urgency/Emergency Health Processes' Modelling: A Case Study

    CERN Document Server

    Santos, Carlos; Ferreira, Carla; Tribolet, José

    2011-01-01

    The growing complexity and sophistication of the organizational information systems, and hospital ones particularly, render difficult their comprehension and, consequently, the implementation of control mechanisms that may assure, at all times, the auditability of the above mentioned systems, without having to use models. This paper, framed in a wider investigation, aims to describe the application of techniques and methodologies, in the sphere of action of Organizational Engineering, in the modelling of business processes developed in the main Operating Theatre of the Coimbra's University Hospital Emergency Service, as a support for the implementation of an information system architecture, using for that purpose the CEO framework, developed and suggested by the Centre for Organizational Engineering (CEO), based on the UML language.

  2. A Study on Signal Group Processing of AUTOSAR COM Module

    Science.gov (United States)

    Lee, Jeong-Hwan; Hwang, Hyun Yong; Han, Tae Man; Ahn, Yong Hak

    2013-06-01

    In vehicle, there are many ECU(Electronic Control Unit)s, and ECUs are connected to networks such as CAN, LIN, FlexRay, and so on. AUTOSAR COM(Communication) which is a software platform of AUTOSAR(AUTomotive Open System ARchitecture) in the international industry standards of automotive electronic software processes signals and signal groups for data communications between ECUs. Real-time and reliability are very important for data communications in the vehicle. Therefore, in this paper, we analyze functions of signals and signal groups used in COM, and represent that functions of signal group are more efficient than signals in real-time data synchronization and network resource usage between the sender and receiver.

  3. Studies on Separation Process and Production Technology of Boron Isotope

    Directory of Open Access Journals (Sweden)

    LI Jian-ping

    2014-02-01

    Full Text Available The boron isotopes separation test was performed by chemical exchange reaction in the benzene ether -three boron fluoride system, which resulted to the boron isotopic enrichment of -10 in the liquid phase, the boron isotopic enrichment of -11 in the gas phase. After then, boron isotope separation trial production has been finished. In this process, the exchange column and complex tower normal operating parameters and the complex tower technology have been obtained, the problems of material distillation purification is solved, boron isotopes feasibility with PTFE packing enrichment is verified in an exchange column. Also, effect of operating pressure, flow and other parameters on boron -10 isotopic enrichment experiments and the effect and properties of the PTFE packing have been investigated in the existing system. All the results are very useful for the industrialization of the boron isotopes separation system.

  4. Technoeconomic study on steam explosion application in biomass processing.

    Science.gov (United States)

    Zimbardi, Francesco; Ricci, Esmeralda; Braccio, Giacobbe

    2002-01-01

    This work is based on the data collected during trials of a continuous steam explosion (SE) plant, with a treatment capacity of about 350 kg/h, including the biomass fractionation section. The energy and water consumption, equipment cost, and manpower needed to run this plant have been used as the base case for a techno-economic evaluation of productive plants. Three processing plant configurations have been considered: (I) SE pretreatment only; (II) SE followed by the hemicellulose extraction; (III) SE followed by the sequential hemicellulose and lignin extractions. The biomass treatment cost has been evaluated as a function of the plant scale. For each configuration, variable and fixed cost breakdown has been detailed in the case of a 50,000 t/y plant.

  5. Transitivity Study-Material Process in Business Negotiation

    Institute of Scientific and Technical Information of China (English)

    刘茜

    2013-01-01

    Since China entered into the World Trade Organization and became a member of this institution, business negotiation has become the important implement in communicating and information exchanging in business market. Compared with the past time, more and more companies involve in the business negotiation at present. This paper uses Halliday* s transitivity theory-material process as its theoretical framework to analyze business negotiation. As soon as reading this thesis totally, English teacher, especially business English teachers should add the awareness on considering unconscious points of business negotiation. They should be led to hold the deep cognition and language choice. Moreover, it is hoped for negotiators to have the understanding for choosing the better words and structure in order to make an agreement in business negotiation.

  6. An experimental study of high-hydrogen welding processes

    Directory of Open Access Journals (Sweden)

    Fydrych, Dariusz

    2015-12-01

    Full Text Available This paper presents investigation results of determination of the diffusible hydrogen content in deposited metal obtained by means of two most often used methods-the glycerin method and the mercury method. Relation has been defined between results of those methods in the area characteristic of low-hydrogen as well as high-hydrogen welding processes. Relations available in the literature do not include the diffusible hydrogen content in deposited metal greater than 35 ml/100 g. Extending the scope of analysis of the diffusible hydrogen quantity to an 80 ml/100 g level considerably simplifies carrying out the steel weldability assessment with the use of high-hydrogen processes and with welding in water environment.Este trabajo presenta los resultados de una investigación sobre la determinación del contenido de hidrógeno difusible en el material aportado mediante dos métodos: el de la glicerina (el más utilizado y el del mercurio. El contenido de dicho hidrógeno se ha definido a partir de los resultados de esos métodos en una zona con bajo contenido en hidrógeno, así como procesos de soldadura con alto contenido en hidrógeno. No hay datos disponibles en la literatura para contenidos de hidrógeno difusible en metal depositado mayores de 35 ml/100 g. Ampliando el análisis de la cantidad de dicho hidrógeno hasta los 80 ml/100 g, se simplifica considerablemente la realización de ensayos de soldabilidad del acero en procesos de alto contenido en hidrógeno así como en la soldadura en medio acuoso.

  7. A combined disease management and process modeling approach for assessing and improving care processes: a fall management case-study.

    Science.gov (United States)

    Askari, Marjan; Westerhof, Richard; Eslami, Saied; Medlock, Stephanie; de Rooij, Sophia E; Abu-Hanna, Ameen

    2013-10-01

    To propose a combined disease management and process modeling approach for evaluating and improving care processes, and demonstrate its usability and usefulness in a real-world fall management case study. We identified essential disease management related concepts and mapped them into explicit questions meant to expose areas for improvement in the respective care processes. We applied the disease management oriented questions to a process model of a comprehensive real world fall prevention and treatment program covering primary and secondary care. We relied on interviews and observations to complete the process models, which were captured in UML activity diagrams. A preliminary evaluation of the usability of our approach by gauging the experience of the modeler and an external validator was conducted, and the usefulness of the method was evaluated by gathering feedback from stakeholders at an invitational conference of 75 attendees. The process model of the fall management program was organized around the clinical tasks of case finding, risk profiling, decision making, coordination and interventions. Applying the disease management questions to the process models exposed weaknesses in the process including: absence of program ownership, under-detection of falls in primary care, and lack of efficient communication among stakeholders due to missing awareness about other stakeholders' workflow. The modelers experienced the approach as usable and the attendees of the invitational conference found the analysis results to be valid. The proposed disease management view of process modeling was usable and useful for systematically identifying areas of improvement in a fall management program. Although specifically applied to fall management, we believe our case study is characteristic of various disease management settings, suggesting the wider applicability of the approach. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.

  8. Modification of averaging process in GR: Case study flat LTB

    CERN Document Server

    Khosravi, Shahram; Mansouri, Reza

    2007-01-01

    We study the volume averaging of inhomogeneous metrics within GR and discuss its shortcomings such as gauge dependence, singular behavior as a result of caustics, and causality violations. To remedy these shortcomings, we suggest some modifications to this method. As a case study we focus on the inhomogeneous model of structured FRW based on a flat LTB metric. The effect of averaging is then studied in terms of an effective backreaction fluid. This backreaction fluid turns out to behave like a dark matter component, instead of dark energy as claimed in literature.

  9. A Meta-Synthesis of Turkish Studies in Science Process Skills

    Science.gov (United States)

    Yildirim, Murat; Çalik, Muammer; Özmen, Haluk

    2016-01-01

    This study thematically evaluates Turkish studies in science process skills (SPS) from 2000 to 2015. In looking for SPS studies, the authors entered the keywords "process skills, science process skills, science education and Turkey/Turkish" in well-known databases (i.e., Academic Search Complete, Education Research Complete, ERIC, and…

  10. VUV photo-processing of PAH cations: quantitative study on the ionization versus fragmentation processes

    CERN Document Server

    Zhen, Junfeng; Joblin, Christine; Mulas, Giacomo; Sabbah, Hassan; Giuliani, Alexandre; Nahon, Laurent; Martin, Serge; Champeaux, Jean-Philippe; Mayer, Paul M

    2016-01-01

    Interstellar polycyclic aromatic hydrocarbons (PAHs) are strongly affected by the absorption of vacuum ultraviolet (VUV) photons in the interstellar medium (ISM), yet the branching ratio between ionization and fragmentation is poorly studied. This is crucial for the stability and charge state of PAHs in the ISM in different environments, affecting in turn the chemistry, the energy balance, and the contribution of PAHs to the extinction and emission curves. We studied the interaction of PAH cations with VUV photons in the 7-20 eV range from the synchrotron SOLEIL beamline, DESIRS. We recorded by action spectroscopy the relative intensities of photo-fragmentation and photo-ionization for a set of eight PAH cations ranging in size from 14 to 24 carbon atoms, with different structures. At photon energies below ~13.6 eV fragmentation dominates for the smaller species, while for larger species ionization is immediately competitive after the second ionization potential (IP). At higher photon energies, all species be...

  11. Subaru/HDS study of CH stars: elemental abundances for stellar neutron-capture process studies

    Science.gov (United States)

    Goswami, Aruna; Aoki, Wako; Karinkuzhi, Drisya

    2016-01-01

    A comprehensive abundance analysis providing rare insight into the chemical history of lead stars is still lacking. We present results from high-resolution (R ˜ 50 000) spectral analyses of three CH stars, HD 26, HD 198269 and HD 224959, and, a carbon star with a dusty envelope, HD 100764. Previous studies on these objects are limited by both resolution and wavelength regions and the results differ significantly from each other. We have undertaken to reanalyse the chemical composition of these objects based on high-resolution Subaru spectra covering the wavelength regions 4020-6775 Å. Considering local thermodynamic equilibrium and using model atmospheres, we have derived the stellar parameters, the effective temperatures Teff, surface gravities log g, and metallicities [Fe/H] for these objects. The derived parameters for HD 26, HD 100764, HD 198269 and HD 224959 are (5000, 1.6, -1.13), (4750, 2.0 -0.86), (4500, 1.5, -2.06) and (5050, 2.1, -2.44), respectively. The stars are found to exhibit large enhancements of heavy elements relative to iron in conformity to previous studies. Large enhancement of Pb with respect to iron is also confirmed. Updates on the elemental abundances for several s-process elements (Y, Zr, La, Ce, Nd, Sm and Pb) along with the first-time estimates of abundances for a number of other heavy elements (Sr, Ba, Pr, Eu, Er and W) are reported. Our analysis suggests that neutron-capture elements in HD 26 primarily originate in the s-process while the major contributions to the abundances of neutron-capture elements in the more metal-poor objects HD 224959 and HD 198269 are from the r-process, possibly from materials that are pre-enriched with products of the r-process.

  12. VUV photo-processing of PAH cations: quantitative study on the ionization versus fragmentation processes.

    Science.gov (United States)

    Zhen, Junfeng; Castillo, Sarah Rodriguez; Joblin, Christine; Mulas, Giacomo; Sabbah, Hassan; Giuliani, Alexandre; Nahon, Laurent; Martin, Serge; Champeaux, Jean-Philippe; Mayer, Paul M

    2016-05-10

    Interstellar polycyclic aromatic hydrocarbons (PAHs) are strongly affected by the absorption of vacuum ultraviolet (VUV) photons in the interstellar medium (ISM), yet the branching ratio between ionization and fragmentation is poorly studied. This is crucial for the stability and charge state of PAHs in the ISM in different environments, affecting in turn the chemistry, the energy balance, and the contribution of PAHs to the extinction and emission curves. We studied the interaction of PAH cations with VUV photons in the 7 - 20 eV range from the synchrotron SOLEIL beamline, DESIRS. We recorded by action spectroscopy the relative intensities of photo-fragmentation and photo-ionization for a set of eight PAH cations ranging in size from 14 to 24 carbon atoms, with different structures. At photon energies below ~13.6 eV fragmentation dominates for the smaller species, while for larger species ionization is immediately competitive after the second ionization potential (IP). At higher photon energies, all species behave similarly, the ionization yield gradually increases, leveling off between 0.8 and 0.9 at ~18 eV. Among isomers, PAH structure appears to mainly affect the fragmentation cross section, but not the ionization cross section. We also measured the second IP for all species and the third IP for two of them, all are in good agreement with theoretical ones confirming that PAH cations can be further ionized in the diffuse ISM. Determining actual PAH dication abundances in the ISM will require detailed modeling. Our measured photo-ionization yields for several PAH cations provide a necessary ingredient for such models.

  13. Comparative Study between Programming Systems for Incremental Sheet Forming Process

    Directory of Open Access Journals (Sweden)

    Moayedfar Majid

    2014-07-01

    Full Text Available Incremental Sheet Forming (ISF is a method developed to form a desired surface feature on sheet metals in batch production series. Due to a lack of dedicated programming system to execute, control and monitor the whole ISF, researchers tried to utilize programming systems designed for chip making process to suits for ISF. In this work, experiments were conducted to find suitability and quality of ISF parts produced by using manual CNC part programming. Therefore, ISF was carried out on stainless steel sheets using Computer Numerical Control (CNC milling machines. Prior to running the experiments, a ball-point shaped tool made of bronze alloy was fabricated due to its superior ability to reduce the amount of friction and improve the surface quality of the stainless steel sheet metal. The experiments also employed the method of forming in negative direction with a blank mould and the tool which helped to shape the desired part quickly. The programming was generated using the MasterCAM software for the CNC milling machine and edited before transferring to the machine. However, the programming for the machine was written manually to show the differences of output date between software programming and manual programming. From the results, best method of programming was found and minimum amount of contact area between tool and sheet metal achieved.

  14. A STUDY OF NUCLEAR PHYSICS PROCESSES AT MIDDLE SCHOOL

    Directory of Open Access Journals (Sweden)

    Mykola I. Sadovyi

    2011-02-01

    Full Text Available The article discloses the problem of new technology usage for the physics’ experiment in the quantum physics modeling. Currency of investigation consists in the need of physics experiment organization and realization in high energy physics with the consistent usage of activity method in middle education institutions. This kind of method considerably stirs up the process of model usage and modeling, abstracting, idealization and analogy. Idealized objects’ creation, elementary part transmutation, in particular, that does not exist in the objective reality, but possesses definite prototypes in the real world that help in their first approximation to the truth. The program Macromedia Flesh has been used in the article. This program has a range of advantages comparing to other possible software according to their possibilities and usage simplicity. The program uses all kinds of computer graph (raster, vectorial, which gives great opportunities for graphic objects’ creation, and prepared files take minimum of the constant memory. A part of developed experiments of the modeling character is given in the article. Demonstrations are done in dynamic rate.

  15. Inferring conduit process from population studies of cinder cone craters

    Science.gov (United States)

    Bemis, Karen G.

    2014-05-01

    One of the most observable aspects of magma conduits is of course their exit to the Earth's surface: the volcanic crater. The craters resulting from small mostly-monogenetic volcanic eruptions vary in considerable in size and shape, even after accounting for variation in size. Presumably, these variations tell us something about the state of the conduit at least in the ending stages of eruption. But what? This work explores the statistical properties of crater populations in Guatemala and elsewhere and speculates on the conduit processes that may explain the complex behavior. Crater depths are strongly correlated with cone slopes even when normalized by cone diameter, which suggests the importance of the impact of the volatile content (which may influence slope through fragmentation and the resulting grain size) and the duration of eruption (which may influence whether the cone is built to its maximum slope) despite erosion acting to reduce observed crater depths (cone slopes are known to decrease with erosion but cone diameters increase).

  16. A study of saltation process using hydrogel particles

    Science.gov (United States)

    Wang, Stella; Zhao, Yuchen; Behringer, Robert

    2016-11-01

    Saltation is a natural process for sediments transported by flow, and occurs in situations such as wind-driven sand dunes in the dessert, and rivers or streams where fluid motion drives gravel. The onset of grain motions is set by the strength of the shear, and grains exhibit rolling, successive jumping where they are lifted by the turbulence. It is an open issue as to how the grain size affects saltation transport, particle velocities and mass fluxes, etc [1]., and also how the inelastic collision between grains affects saltation. Here, we describe a new saltation experiment using hydrogel particles immersed in uniform flow of water. Because the refraction indexes of particles and the fluid are nearly matched, the hydrogel particles can be imaged by a parallel light source, resulting in overlapping dark rings that not only reflect lateral positions, but also depths in one 2D image at one time. Mono-disperse particles are used and their size is adjusted by changing salt concentrations in the fluid. Preliminary results show that the softness of hydrogel particles leads to relatively large collisional losses. This property allows us to explore the phase diagram of saltation transport in the in-elastic collision regime. NSF-DMR-1206351 and the William M. Keck Foundation.

  17. Study on thorium recovery from bastnaesite treatment process

    Institute of Scientific and Technical Information of China (English)

    ZHANG Yongqi; XU Yang; HUANG Xiaowei; LONG Zhiqi; CUI Dali; HU Feng

    2012-01-01

    Thorium (Th) stripping behavior from HEH/EHP (2-(ethylhexyl) phosphoric acid mono-2-ethylhexyl ester) with H2SO4,HCl and HNO3 were investigaated.The results indicated that H2SO4 was the most effective stripping reagent compared with HCl and HNO3.Selecting H2SO4 as the stripping reagent,the effect of phase ratio,acidity,H2SO4 amount,HEH/EHP concentration and Th loading in HEH/EHP on Th stripping were systematically investigated.As a result,the optimum stripping conditions of Th(Ⅳ) were obtained as the concentration of H2SO4 solution was 3.50 mol/L,phase ratio was 4∶1.Low HEH/EHP concentration was benefit for Th stripping.Based on the results,pilot test for new Bastnaesite treatment process was carried out and the recovery of Ce,F and Th were more than 99%,98% and 95% separately.

  18. Study on rolling process optimization of high carbon steel wire

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The existing problems in the manufacture of SWRH82B high carbon steel wire were discussed by sampling and testing the microstructure and properties of the steel from the workshop. To solve the problems, the experimental parameters for thermal simulation were optimized, and the thermal simulating experiments were carried out on a Gleeble1500 thermal simulator. The process parameters for the manufacture were optimized after analysis of the data, and the productive experiments were performed after the water box in front of the no-twist blocks was reconstructed, to control the temperature of the loop layer. The results from the productive experiments showed that the cooling rate of 10-15 ℃/s was reasonable before phase transformation, about 5℃/s during phase wire was increased to 1150-1170 MPa with an increase of 20-30 MPa, the percentage reduction of section was to 34%-36% with an increase of 1%-3% by testing the finished products after reconstruction.

  19. Dynamical Study of Prebiotic Processing by Comet Impact

    Science.gov (United States)

    Huo, Winifred M.; Dateo, Christopher E.; McKay, Christopher P.; Borucki, William J.

    2003-01-01

    Comets and meteoroids that bombarded the Earth, other planets and moons are considered possible deliverers of prebiotic materials manufactured in space. Simultaneously, chemical processing can be initiated by the large kinetic energy imparted to the planetary atmosphere during comet/meteoroid entry. The efficiency of organic synthesis and the diversity of products by impact shock are known to decrease as the reducing power of the atmosphere decreases. It is generally accepted that rich organic products are produced in a methane atmosphere whereas a carbon dioxide atmosphere is reported to yield a dearth of products In order to understand the details of impact chemistry and how it depends on the atmospheric composition, we carried out simulations of the chemistry initiated by comet/meteoroid impact upon a planetary atmosphere using different atmospheric compositions. The simulations were done by solving the set of coupled equations for mass, momentum, and energy conservations, chemical kinetics, and transport, that describe a high-energy impact shock, subsequent expansion and cooling of the hot shocked gas by mixing with the ambient gas, and the eventual steady state composition.

  20. Optical emission spectroscopy study on deposition process of microcrystalline silicon

    Institute of Scientific and Technical Information of China (English)

    Wu Zhi-Meng; Lei Qing-Song; Geng Xin-Hua; Zhao Ying; Sun Jian; Xi Jian-Ping

    2006-01-01

    This paper reports that the optical emission spectroscopy (OES) is used to monitor the plasma during the deposition process of hydrogenated microcrystalline silicon films in a very high frequency plasma enhanced chemical vapour deposition system. The OES intensities (SiH*, H*α and H*β) are investigated by varying the deposition parameters. The result shows that the discharge power, silane concentrations and substrate temperature affect the OES intensities. When the discharge power at silane concentration of 4% increases, the OES intensities increase first and then are constant, the intensities increase with the discharge power monotonously at silane concentration of 6%. The SiH* intensity increases with silane concentration, while the intensities of H*α and H*β increase first and then decrease. When the substrate temperature increases, the SiH* intensity decreases and the intensities of H*α and H*β are constant. The correlation between the intensity ratio of IH*α/ISiH* and the crystalline volume fraction (Xc) of films is confirmed.

  1. Devolatilization studies of oil palm biomass for torrefaction process optimization

    Science.gov (United States)

    Daud, D.; Abd Rahman, A.; Shamsuddin, A. H.

    2013-06-01

    Torrefaction of palm biomass, namely Empty Fruit Bunch (EFB) and Palm Kernel Shell (PKS), was conducted using thermogravimetric analyser (TGA). The experiment was conducted in variation of temperatures of 200 °C, 260 °C and 300 °C at a constant residence time of 30 minutes. During the torrefaction process, the sample went through identifiable drying and devolatilization stages from the TGA mass loss. The percentage of volatile gases released was then derived for each condition referring to proximate analysis results for both biomass. It was observed an average of 96.64% and 87.53 % of the total moisture is released for EFB and PKS respectively. In all cases the volatiles released was observed to increase as the torrefaction temperature was increased with significant variation between EFB and PKS. At 300°C EFB lost almost half of its volatiles matter while PKS lost slightly over one third. Results obtained can be used to optimise condition of torrefaction according to different types of oil palm biomass.

  2. Beneficiation-hydroretort processing of US oil shales, engineering study

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, L.R.; Riley, R.H.

    1988-12-01

    This report describes a beneficiation facility designed to process 1620 tons per day of run-of-mine Alabama oil shale containing 12.7 gallons of kerogen per ton of ore (based on Fischer Assay). The beneficiation facility will produce briquettes of oil shale concentrate containing 34.1 gallons of kerogen per ton (based on Fischer Assay). The beneficiation facility will produce briquettes of oil shale concentrate containing 34.1 gallons of kerogen per ton (based on Fischer Assay) suitable for feed to a hydroretort oil extraction facility of nominally 20,000 barrels per day capacity. The beneficiation plant design prepared includes the operations of crushing, grinding, flotation, thickening, filtering, drying, briquetting, conveying and tailings empoundment. A complete oil shale beneficiation plant is described including all anticipated ancillary facilities. For purposes of determining capital and operating costs, the beneficiation facility is assumed to be located on a generic site in the state of Alabama. The facility is described in terms of the individual unit operations with the capital costs being itemized in a similar manner. Additionally, the beneficiation facility estimated operating costs are presented to show operating costs per ton of concentrate produced, cost per barrel of oil contained in concentrate and beneficiation cost per barrel of oil extracted from concentrate by hydroretorting. All costs are presented in fourth quarter of 1988 dollars.

  3. The role of early stages of cortical visual processing in size and distance judgment: a transcranial direct current stimulation study.

    Science.gov (United States)

    Costa, Thiago L; Costa, Marcelo F; Magalhães, Adsson; Rêgo, Gabriel G; Nagy, Balázs V; Boggio, Paulo S; Ventura, Dora F

    2015-02-19

    Recent research suggests that V1 plays an active role in the judgment of size and distance. Nevertheless, no research has been performed using direct brain stimulation to address this issue. We used transcranial direct-current stimulation (tDCS) to directly modulate the early stages of cortical visual processing while measuring size and distance perception with a psychophysical scaling method of magnitude estimation in a repeated-measures design. The subjects randomly received anodal, cathodal, and sham tDCS in separate sessions starting with size or distance judgment tasks. Power functions were fit to the size judgment data, whereas logarithmic functions were fit to distance judgment data. Slopes and R(2) were compared with separate repeated-measures analyses of variance with two factors: task (size vs. distance) and tDCS (anodal vs. cathodal vs. sham). Anodal tDCS significantly decreased slopes, apparently interfering with size perception. No effects were found for distance perception. Consistent with previous studies, the results of the size task appeared to reflect a prothetic continuum, whereas the results of the distance task seemed to reflect a metathetic continuum. The differential effects of tDCS on these tasks may support the hypothesis that different physiological mechanisms underlie judgments on these two continua. The results further suggest the complex involvement of the early visual cortex in size judgment tasks that go beyond the simple representation of low-level stimulus properties. This supports predictive coding models and experimental findings that suggest that higher-order visual areas may inhibit incoming information from the early visual cortex through feedback connections when complex tasks are performed. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  4. Molecular Dynamics Studies of Energy Transfer Processes in Crystal Systems.

    Science.gov (United States)

    1984-11-30

    Computer molecular dynamics studies have been carried out on the problem of attaining a fundamental understanding of shock-induced initiation of...intramolecular energy exchange in shock-loaded systems are presented. Originator-supplied keywords include: Molecular dynamics , Energy transfer, Shock front, Shock wave, Explosives, Shock structure.

  5. Collection & Processing of Vertebrate Specimens for Arbovirus Studies.

    Science.gov (United States)

    Sudia, W. Daniel; And Others

    Described are techniques used by the National Communicable Disease Center in obtaining blood and tissues from man and other vertebrates for arbovirus isolation and antibody studies. Also included are techniques for capturing and handling vertebrates; banding and marking; restraining and bleeding; storing of specimens to preserve antibody and…

  6. The Processing of Architects' Records. A Case-Study: France.

    Science.gov (United States)

    Hildesheimer, Francoise

    By means of close examination of the records created and accumulated by individual architects and architectural firms in France, this Records and Archives Management Programme (RAMP) study is intended to call attention to the basic documentary values of these architectural records and to provide practical guidance to help ensure their preservation…

  7. Face Processing at Birth: A Thatcher Illusion Study

    Science.gov (United States)

    Leo, Irene; Simion, Francesca

    2009-01-01

    The present study was aimed at exploring newborns' ability to recognize configural changes within real face images by testing newborns' sensitivity to the Thatcher illusion. Using the habituation procedure, newborns' ability to discriminate between an unaltered face image and the same face with the eyes and the mouth 180 degrees rotated (i.e.…

  8. Explorative computational study of the singlet fission process

    NARCIS (Netherlands)

    Havenith, Remco W. A.; de Gier, Hilde D.; Broer, Ria

    2012-01-01

    Different ab initio methods, namely multi-reference and nonorthogonal configuration interaction techniques, are explored for their applicability in studying the singlet fission problem. It has been shown for 2-methyl-1,5-hexadiene that the (TT)-T-1 state can be identified using multi-reference techn

  9. Error and reinforcement processing in ADHD : An electrophysiological study

    NARCIS (Netherlands)

    Groen, Yvonne

    2011-01-01

    Introduction and Objective(s) Current explanatory models of ADHD suggest abnormal reinforcement sensitivity, but the exact nature of this deficit is unclear. In this study we investigate electrophysiological reactions to positive/negative reinforcement as well as correct/error responses to gain more

  10. A computational study of the time dependent crack growth process

    Energy Technology Data Exchange (ETDEWEB)

    Brust, F.W.; Krishnaswamy, P.

    1992-01-01

    Universal studies of creep crack growth for (1) constant load and (2) variable load cases are presented. Results of the constant load cases is compared to experiment. The behavior of displacements and integral creep for fracture parameters are discussed for both load cases. The need for using a constitutive law which can handle cyclic creep is discussed.

  11. Initial study of Nickel Electrolyte for EnFACE Process

    Directory of Open Access Journals (Sweden)

    Tri Widayatno

    2015-03-01

    Full Text Available Nickel electrolyte for a micro-pattern transfer process without photolithography, EnFACE, has been developed. Previous work on copper deposition indicated that a conductivity of ~2.7 Sm-1 is required. Electrochemical parameters of electrolyte i.e. current density and overpotential are also crucial to govern a successful pattern replication. Therefore, the investigation focused on the measurement of physicochemical properties and electrochemical behaviour of the electrolyte at different nickel concentrations and complexing agents of chloride and sulfamate. Nickel electrolytes containing sulfamate, chloride and combined sulfamate-chloride with concentrations between 0.14 M and 0.3 M were investigated. Physicochemical properties i.e. pH and conductivity were measured to ensure if they were in the desired value. The electrochemical behaviour of the electrolytes was measured by polarisation experiments in a standard three-electrode cell. The working electrode was a copper disc (surface area of 0.196 cm2 and the counter electrode was platinum mesh. The potential was measured againts a saturated calomel reference electrode (SCE. The experiments were carried out at various scan rate and Rotating Disc Electrode (RDE rotation speed to see the effect of scan rate and agitation. Based on the measured physicochemical properties, the electrolyte of 0.19 M nickel sulfamate was chosen for experimentation. Polarisation curve of agitated solution suggested that overall nickel electrodeposition reaction is controlled by a combination of kinetics and mass transfer.  Reduction potential of nickel was in the range of -0.7 to -1.0 V. The corresponding current densities for nickel deposition were in the range of -0.1 to -1.5 mA cm-2.

  12. Overview of the Dissertation Process within the Framework of Flow Theory: A Qualitative Study

    Science.gov (United States)

    Cakmak, Esra; Oztekin, Ozge; Isci, Sabiha; Danisman, Sahin; Uslu, Fatma; Karadag, Engin

    2015-01-01

    The purpose of this study is to examine the flow of doctoral students who are also research assistants and in the dissertation process. The study was designed using the case study method. The case undertaken in the study was the dissertation process. Eleven participants were selected into the study using maximum variation sampling. Face-to-face,…

  13. Process Integration in the Danish Food Industry. A Case Study

    Directory of Open Access Journals (Sweden)

    Bjørn Qvale

    2000-12-01

    Full Text Available

    This paper describes the results from a case study in the Danish medium-size industry. A heat-recovery system, producing 120 m3 of hot water per working day, has been constructed and has been in operation since the beginning of the year 2000.

    In this study, simplified procedures and networks for heat recovery were combined with economic evaluations based on suppliers’ offers and the marginal values of the investments. By logical procedures described in an earlier paper, the problem was reduced to the design and optimisation of a network for production of hot water. A short description of the basic ideas is given in the Appendix.

    •  This paper was presented at the ECOS'00 Conference in Enschede, July 5-7, 2000

  14. Coalescent processes arising in a study of diffusive clustering

    CERN Document Server

    Greven, Andreas; Winter, Anita

    2007-01-01

    This paper studies spatial coalescents on $\\Z^2$. In our setting, the partition elements are located at the sites of $\\Z^2$ and undergo local delayed coalescence and migration. The system starts in either locally finite configurations or in configurations containing countably many partition elements per site. Our goal is to determine the longtime behavior with an initial population of countably many individuals per site restricted to a box $[-t^{\\alpha/2}, t^{\\alpha/2}]^2 \\cap \\Z^2$ and observed at time $t^\\beta$ with $1 \\geq \\beta \\geq \\alpha\\ge 0$. We study both asymptotics, as $t\\to\\infty$, for a fixed value of $\\alpha$ as the parameter $\\beta\\in[\\alpha,1]$ varies, and for a fixed $\\beta=1$, as the parameter $\\alpha\\in [0,1]$ varies. A new random object, the so-called {\\em coalescent with rebirth}, is constructed and shown to arise in the limit. In view of future applications we introduce the spatial coalescent with rebirth and study its longtime asymptotics as well. The present paper is the basis for fort...

  15. Laboratory studies of nitrate radical chemistry - application to atmospheric processes

    Energy Technology Data Exchange (ETDEWEB)

    Noremsaune, Ingse

    1997-12-31

    This thesis studies atmospheric chemistry and tries in particular to fill gaps in the data base of atmospheric reactions. It studies the nitrate radical reactions with chloroethenes and with but-2-yne (2-butyne). The mechanisms and rate coefficients for the NO{sub 3}-initiated degradation of the chloroethenes and 2-butyne were investigated by means of the static reaction chamber and the fast flow-discharge technique. The reactions between the nitrate radical and the chloroethenes were studied at atmospheric pressure in a reaction chamber with synthetic air as bath gas. FTIR (Fourier Transform InfraRed spectroscopy) spectroscopy was used to follow the reactions and to identify the products. Products were observed for the reactions with (E)-1,2-dichloroethene and tetrachloroethene, although the absorption bands are weak. The alkyl peroxynitrate and nitrate compounds form very strong and characteristic absorption bands. The rate coefficients for the reactions between NO{sub 3} and the chloroethenes were investigated at room temperature by three different methods. The results are given in tables. 132 refs., 44 figs., 21 tabs.

  16. A Study on the Influence of Process Parameters on the Viscoelastic Properties of ABS Components Manufactured by FDM Process

    Science.gov (United States)

    Dakshinamurthy, Devika; Gupta, Srinivasa

    2016-06-01

    Fused Deposition Modelling (FDM) is a fast growing Rapid Prototyping (RP) technology due to its ability to build parts having complex geometrical shape in reasonable time period. The quality of built parts depends on many process variables. In this study, the influence of three FDM process parameters namely, slice height, raster angle and raster width on viscoelastic properties of Acrylonitrile Butadiene Styrene (ABS) RP-specimen is studied. Statistically designed experiments have been conducted for finding the optimum process parameter setting for enhancing the storage modulus. Dynamic Mechanical Analysis has been used to understand the viscoelastic properties at various parameter settings. At the optimal parameter setting the storage modulus and loss modulus of the ABS-RP specimen was 1008 and 259.9 MPa respectively. The relative percentage contribution of slice height and raster width on the viscoelastic properties of the FDM-RP components was found to be 55 and 31 % respectively.

  17. Coastal Processes Study of Santa Barbara and Ventura Counties, California

    Science.gov (United States)

    Barnard, Patrick L.; Revell, David L.; Hoover, Dan; Warrick, Jon; Brocatus, John; Draut, Amy E.; Dartnell, Pete; Elias, Edwin; Mustain, Neomi; Hart, Pat E.; Ryan, Holly F.

    2009-01-01

    The Santa Barbara littoral cell (SBLC) is a complex coastal system with significant management challenges. The coastline ranges broadly in exposure to wave energy, fluvial inputs, hard structures, and urbanization. Geologic influence (structural control) on coastline orientation exerts an important control on local beach behavior, with anthropogenic alterations and the episodic nature of sediment supply and transport also playing important roles. Short- and long-term temporal analyses of shoreline change, beach width, and volume change show no obvious trends in regional beach behavior. Extensive armoring along the SBLC has accreted the back beach, narrowing beach widths and in some cases increasing sediment transport. Unarmored beaches have exhibited mild erosion while maintaining similar widths. Harbor constructions have had notable impacts on downdrift beaches, but once the coastal system has equilibrated the signal becomes strongly dampened and littoral-drift gradients driven by natural shoreline orientation again become dominant. Sediment inputs from the Santa Clara River dominate sediment processes on beaches to the south. The SBLC is dominated by episodic flood and storm-wave events. Exceptionally large accretion signals along this stretch of coastline are closely tied to major flood events when large amounts of sediment are deposited in deltas. These deltas decay over time, supplying downdrift beaches with sediment. Storm-wave impacts and gradients in alongshore transport can lead to beach rotations and migrating erosion hotspots when geological controls are weak. Annual and seasonal rates of cross-shore and alongshore transport are at least 2-3 times higher for the more west- and southwest-facing beaches south of the Ventura River as compared to the more sheltered beaches to the west/north. Gross littoral transports are good approximations of net littoral transports for beaches west/north of Ventura as transport is almost purely unidirectional. However

  18. Laboratory studies of aeolian sediment transport processes on planetary surfaces

    Science.gov (United States)

    Rasmussen, Keld R.; Valance, Alexandre; Merrison, Jonathan

    2015-09-01

    We review selected experimental saltation studies performed in laboratory wind tunnels and collision experiments performed in (splash-) laboratory facilities that allow detailed observations between impinging particles on a stationary bed. We also discuss progress in understanding aeolian transport in nonterrestrial environments. Saltation studies in terrestrial wind tunnels can be divided into two groups. The first group comprises studies using a short test bed, typically 1-4 m long, and focuses on the transitional behavior near the upwind roughness discontinuity where saltation starts. The other group focuses on studies using long test beds - typically 6 m or more - where the saturated saltation takes place under equilibrium conditions between wind flow and the underlying rough bed. Splash studies using upscaled model experiments allow collision simulations with large spherical particles to be recorded with a high speed video camera. The findings indicate that the number of ejected particles per impact scales linearly with the impact velocity of the saltating particles. Studies of saturated saltation in several facilities using predominantly Particle Tracking Velocimetry or Laser Doppler Velocimetry indicate that the velocity of the (few) particles having high trajectories increases with increasing friction velocity. However, the speed of the majority of particles that do not reach much higher than Bagnold's focal point is virtually independent of Shields parameter - at least for low or intermediate u*-values. In this case mass flux depends on friction velocity squared and not cubed as originally suggested by Bagnold. Over short beds particle velocity shows stronger dependence on friction velocity and profiles of particle velocity deviate from those obtained over long beds. Measurements using horizontally segmented traps give average saltation jump-lengths near 60-70 mm and appear to be only weakly dependent on friction velocity, which is in agreement with some

  19. Autonomous Research Vessels for Adaptive Upper-Ocean Process Studies

    Science.gov (United States)

    2014-09-30

    wave and turbulence modeling for interpretation. OBJECTIVES This award is supporting the development  of Autonomous Research Vessels   (ARVs) for...outlet glacier,  and within meters of large icebergs .   This vehicle  was  specifically  developed  for fjord research, so is small (2...sampling.   As an example,  data from a 1.5 hour mission to study the dynamics of iceberg wakes is shown  below.   During this period, R/V Rob

  20. [Preparation of recombinant human insulin--study of downstream process].

    Science.gov (United States)

    Yu, Rong; Li, Xiaohong; Yang, Jiyu; Wu, Wutong

    2004-10-01

    This study was intended to establish a method of preparation of recombinant human insulin, with (His)6-Arg-Arg-human proinsulin (RRhPI) expressed by Escherichia coli. After DEAE-Sepharose Fast Flow ion-exchange chromatography, Sephadex G-25 chromatography and refolding, enzyme cleavage and Superdex 75 size exclusion chromatography,the RRhPI expressed by Escherichia coli in inclusion body form was converted to human insulin. The obtained recombinant human insulin was analyzed by SDS-PAGE, HPLC, amino acid composition analysis and bioidentity test (mouse convulsion test). The results indicate that our obtained preparation is highly purified, active recombinant human insulin.

  1. NMR potentials for studying physical processes in fossil coals

    Energy Technology Data Exchange (ETDEWEB)

    Alekseev, Anatolii D; Ul' yanova, Ekaterina V; Vasilenko, Tat' yana A [Institute of Mining Processes Physics, National Academy of Sciences of Ukraine, Donetsk (Ukraine)

    2005-11-30

    High-resolution, pulsed, and wide-line NMR studies of fossil coals are reviewed. Coal substance conversion due to outbursts is discussed. Results on water and methane interactions with coal substance, which provide insight into the dynamic characteristics of boundary water, the location of methane in coal structure, and water and methane's hazard implications for coal beds (gas- or geodynamic phenomena) are presented; these are shown to have potential for predicting and preventing life threatening situations. (instruments and methods of investigation)

  2. Spin studies via Drell-Yan processes at PANDA

    Science.gov (United States)

    Destefanis, M.

    2014-06-01

    The nucleon structure is still not completely understood. A transverse momentum dependent description of the nucleon structure is a crucial milestone for several forthcoming studies in a wide range of experimental scenarios. By means of antiproton beams, possibly polarized in a later stage of the project, with a beam momentum up to 15 GeV/c, which will be available at the future FAIR facility, the nonperturbative region of QCD is planned to be investigated. One of the main goals of the forthcoming experiments at FAIR is the study of Drell-Yan lepton pairs by means of proton-antiproton annihilations, taking also advantage of the expected high luminosity. The Drell-Yan production is a unique tool to access the spin dependent properties of the nucleon, and in particular its transverse degrees of freedom. Transverse Momentum Dependent (TMD) Parton Distribution Functions (PDFs), i.e. the Boer-Mulders function, the Sivers function, and the Transversity, could be deeply investigated by means of experimental angular asymmetries. In later stages of FAIR, single- and double-spin asymmetries could be investigated as well. The Drell-Yan physics program which could be accessed at FAIR with the PANDA experiment will be discussed in details, in the light of existing results in the field.

  3. Spin studies via Drell-Yan processes at PANDA

    Directory of Open Access Journals (Sweden)

    Destefanis M.

    2014-06-01

    Full Text Available The nucleon structure is still not completely understood. A transverse momentum dependent description of the nucleon structure is a crucial milestone for several forthcoming studies in a wide range of experimental scenarios. By means of antiproton beams, possibly polarized in a later stage of the project, with a beam momentum up to 15 GeV/c, which will be available at the future FAIR facility, the nonperturbative region of QCD is planned to be investigated. One of the main goals of the forthcoming experiments at FAIR is the study of Drell-Yan lepton pairs by means of proton-antiproton annihilations, taking also advantage of the expected high luminosity. The Drell-Yan production is a unique tool to access the spin dependent properties of the nucleon, and in particular its transverse degrees of freedom. Transverse Momentum Dependent (TMD Parton Distribution Functions (PDFs, i.e. the Boer-Mulders function, the Sivers function, and the Transversity, could be deeply investigated by means of experimental angular asymmetries. In later stages of FAIR, single- and double-spin asymmetries could be investigated as well. The Drell-Yan physics program which could be accessed at FAIR with the PANDA experiment will be discussed in details, in the light of existing results in the field.

  4. Study of hard processes in the ALICE experiment

    CERN Document Server

    Vajzer, Michal; Bielcikova, Jana

    2015-01-01

    Jets are collimated sprays of particles resulting from fragmentation of associated hard scattered partons. They are measured in different types of collisions at different energies to test perturbative quantum chromodynamic calculations and are used to study the hard scattering, fragmentation, hadronisation and other properties of partons. These properties studied in simple systems such as proton-proton collisions, serve as a baseline to investigate their modifications by hot and dense nuclear matter created in high energy heavy-ion collisions. This thesis presents analysis of data from minimum bias proton-proton collisions at centre of mass energy of 2.76 and 7 TeV collected using the ALICE detector system at the LHC is presented with jet transverse momenta in range from 20 GeV/c to 100 GeV/c. Reconstruction of the inclusive jet cross-section from charged tracks at midrapidity is done using standard modern anti-k$_T$ and k$_T$ algorithms with underlying event subtraction and correction for detector effects vi...

  5. Fractures of the mandibular coronoid process: a two centres study.

    Science.gov (United States)

    Boffano, Paolo; Kommers, Sofie C; Roccia, Fabio; Gallesio, Cesare; Forouzanfar, Tymour

    2014-10-01

    The aim of this study was to assess the characteristics of patients with coronoid fractures treated in two European centres over 10 years and to briefly review the literature. This study is based on 2 systematic computer-assisted databases that have continuously recorded patients hospitalized with maxillofacial fractures and surgically treated in two European centres between 2001 and 2010. During the 10 years, 1818 patients and 523 patients with maxillofacial fractures were admitted to the two centres respectively: 21 patients (16 males, 5 females) were admitted with 21 coronoid fractures and 28 associated maxillofacial fractures. A mean age of 42.1 years was observed. The fractures were mainly the result of motor vehicle accidents, followed by assaults and falls. The most frequently observed associated maxillofacial fracture was a zygomatic fracture (13 fractures). In both centres, mandibular coronoid fractures are treated unless a severe dislocation of the fractured coronoid is observed or a functional mandibular impairment is encountered. Conservative treatment can be used, together with the open reduction and internal fixation of associated fractures. The crucial point is to prevent ankylosis, which may be prevented by correct and early postoperative physiotherapy and mandibular function.

  6. Technology for advanced liquefaction processes: Coal/waste coprocessing studies

    Energy Technology Data Exchange (ETDEWEB)

    Cugini, A.V.; Rothenberger, K.S.; Ciocco, M.V. [Pittsburgh Energy Technology Center, PA (United States)] [and others

    1995-12-31

    The efforts in this project are directed toward three areas: (1) novel catalyst (supported and unsupported) research and development, (2) study and optimization of major operating parameters (specifically pressure), and (3) coal/waste coprocessing. The novel catalyst research and development activity has involved testing supported catalysts, dispersed catalysts, and use of catalyst testing units to investigate the effects of operating parameters (the second area) with both supported and unsupported catalysts. Several supported catalysts were tested in a simulated first stage coal liquefaction application at 404{degrees}C during this performance period. A Ni-Mo hydrous titanate catalyst on an Amocat support prepared by Sandia National laboratories was tested. Other baseline experiments using AO-60 and Amocat, both Ni-Mo/Al{sub 2}O{sub 3} supported catalysts, were also made. These experiments were short duration (approximately 12 days) and monitored the initial activity of the catalysts. The results of these tests indicate that the Sandia catalyst performed as well as the commercially prepared catalysts. Future tests are planned with other Sandia preparations. The dispersed catalysts tested include sulfated iron oxide, Bayferrox iron oxide (iron oxide from Miles, Inc.), and Bailey iron oxide (micronized iron oxide from Bailey, Inc.). The effects of space velocity, temperature, and solvent-to-coal ratio on coal liquefaction activity with the dispersed catalysts were investigated. A comparison of the coal liquefaction activity of these catalysts relative to iron catalysts tested earlier, including FeOOH-impregnated coal, was made. These studies are discussed.

  7. Writing in an Electronic Age: A Case Study of L2 Composing Processes

    Science.gov (United States)

    Stapleton, Paul

    2010-01-01

    Studies on second language (L2) learners writing in English have found that composing is a recursive process requiring planning, formulating and revising. Of particular note among the many studies that have explored the composing processes of L2 writers are two characteristics: 1) They examine the composing processes of writers in real-time while…

  8. Study on Cracking Process of Power Boiler Element

    Science.gov (United States)

    Mutwil, K.; Cieśla, M.

    2012-05-01

    This paper presents the study of the reasons for cracking of spray steam attemperator. The element being analysed is a temperature controller of steam for turbine; its proper functioning has considerable impact on operation of power generating set of boiler and turbine. Damage to the steam attemperator may affect the durability of neighbouring components, replacement or repair of which results in a long-term outage of power generation unit. The reason for attemperator cracking has been determined on the basis of strength calculations and micro-and macro-analysis of fracture surfaces. The conducted tests were the basis for modification of attemperator design, which will ensure reliable functioning of the analysed element.

  9. Study of Energy Consumption of Potato Slices During Drying Process

    Directory of Open Access Journals (Sweden)

    Hafezi Negar

    2015-06-01

    Full Text Available One of the new methods of food drying using infrared heating under vacuum is to increase the drying rate and maintain the quality of dried product. In this study, potato slices were dried using vacuum-infrared drying. Experiments were performed with the infrared lamp power levels 100, 150 and 200 W, absolute pressure levels 20, 80, 140 and 760 mmHg, and with three thicknesses of slices 1, 2 and 3 mm, in three repetitions. The results showed that the infrared lamp power, absolute pressure and slice thickness have important effects on the drying of potato. With increasing the radiation power, reducing the absolute pressure (acts of vacuum in the dryer chamber and also reducing the thickness of potato slices, drying time and the amount of energy consumed is reduced. In relation to thermal utilization efficiency, results indicated that with increasing the infrared radiation power and decreasing the absolute pressure, thermal efficiency increased.

  10. The glass transition process in humid biopolymers. DSC study

    Energy Technology Data Exchange (ETDEWEB)

    Grunina, N A; Belopolskaya, T V; Tsereteli, G I [V.A. Fock Research Institute for Physics of Saint-Petersburg State University, 198504, Petrodvorets (Russian Federation)

    2006-05-15

    Thermal properties of native and denatured biopolymers with quite different chemical and steric structure (globular and fibrillar proteins, DNA, starches) were studied by means of differential scanning calorimetry in a wide range of temperatures and concentrations of water. It was shown that both native and denatured humid biopolymers are glassy systems. The glass transition temperature of these systems strongly depends on percentage of water, with water being simultaneously an intrinsic element of systems' ordered structure and a plasticizer of its amorphous state. On the base of the absolute values of heat capacities for biopolymer-water systems as a whole, heat capacities for biopolymers themselves were calculated as functions on water concentration at fixed temperatures. The S-shaped change of heat capacity observed on diagrams of state both for native and denatured biopolymers is the manifestation of biopolymers' passing through the vitrification region, as it occurs for denatured samples at heating.

  11. A novel device for the study of somatosensory information processing.

    Science.gov (United States)

    Holden, Jameson K; Nguyen, Richard H; Francisco, Eric M; Zhang, Zheng; Dennis, Robert G; Tommerdahl, Mark

    2012-03-15

    Current methods for applying multi-site vibratory stimuli to the skin typically involve the use of multiple, individual vibrotactile stimulators. Limitations of such an arrangement include difficulty with both positioning the stimuli as well as ensuring that stimuli are delivered in a synchronized and deliberate manner. Previously, we reported a two-site tactile stimulator that was developed in order to solve these problems (Tannan et al., 2007a). Due to both the success of that novel stimulator and the limitations that were inherent in that device, we designed and fabricated a four-site stimulator that provides a number of advantages over the previous version. First, the device can stimulate four independent skin sites and is primarily designed for stimulating the digit tips. Second, the positioning of the probe tips has been re-designed to provide better ergonomic hand placement. Third, the device is much more portable than the previously reported stimulator. Fourth, the stimulator head has a much smaller footprint on the table or surface where it resides. To demonstrate the capacity of the device for delivering tactile stimulation at four independent sites, a finger agnosia protocol, in the presence and absence of conditioning stimuli, was conducted on seventeen healthy control subjects. The study demonstrated that with increasing amplitudes of vibrotactile conditioning stimuli concurrent with the agnosia test, inaccuracies of digit identification increased, particularly at digits D3 and D4. The results are consistent with prior studies that implicated synchronization of adjacent and near-adjacent cortical ensembles with conditioning stimuli in impacting TOJ performance (Tommerdahl et al., 2007a,b).

  12. A novel device for the study of somatosensory information processing

    Science.gov (United States)

    Holden, Jameson K.; Nguyen, Richard H.; Francisco, Eric M.; Zhang, Zheng; Dennis, Robert G.; Tommerdahl, Mark

    2012-01-01

    Current methods for applying multi-site vibratory stimuli to the skin typically involve the use of multiple, individual vibrotactile stimulators. Limitations of such an arrangement include difficulty with both positioning the stimuli as well as ensuring that stimuli are delivered in a synchronized and deliberate manner. Previously, we reported a two-site tactile stimulator that was developed in order to solve these problems (Tannan et al., 2007a). Due to both the success of that novel stimulator and the limitations that were inherent in that device, we designed and fabricated a four-site stimulator that provides a number of advantages over the previous version. First, the device can stimulate four independent skin sites and is primarily designed for stimulating the digit tips. Second, the positioning of the probe tips has been re-designed to provide better ergonomic hand placement. Third, the device is much more portable than the previously-reported stimulator. Fourth, the stimulator head has a much smaller footprint on the table or surface where it resides. To demonstrate the capacity of the device for delivering tactile stimulation at four independent sites, a finger agnosia protocol, in the presence and absence of conditioning stimuli, was conducted on seventeen healthy control subjects. The study demonstrated that with increasing amplitudes of vibrotactile conditioning stimuli concurrent with the agnosia test, inaccuracies of digit identification increased, particularly at digits D3 and D4. The results are consistent with prior studies that implicated synchronization of adjacent and near-adjacent cortical ensembles with conditioning stimuli in impacting TOJ performance (Tommerdahl et al., 2007). PMID:22155443

  13. Small angle detectors for study diffractive processes with CMS

    Energy Technology Data Exchange (ETDEWEB)

    Albrow, M. [Fermilab; Bell, A. J. [CERN; d' Enterria, D. [CERN; Hall-Wilton, R. [CERN; Los, S. [Fermilab; Mokhov, N. [Fermilab; Murray, M. [Kansas State U.; Penzo, A. [INFN, Trieste; Popescu, S. [Bucharest, IFIN-HH; Ronzhin, A. [Fermilab; Samoylenko, V. D. [Serpukhov, IHEP; Sobol, A. [Serpukhov, IHEP; Veres, G. [CERN

    2014-10-22

    The approach and detectors for diffractive physics based on two current projects—Forward Shower Counter (FSC) and Proton Precision Spectrometer (PPS) are presented. FSC system consists of six (3+3) Stations of scintillator counters, which surround closely the beam pipes along 59 m < |z| < 140 m from IP5 on both plus (+) and minus (-) sides. These will detect showers from very forward particles with rapidity 7.5 < |η| < 10 interacting in the beam pipe and surrounding material. FSC allow measurements of single diffraction: p+p → p+G+X (where G is rapidity gap) for lower masses and double diffraction p+p → X+G+X with a large central rapidity gap. The counters can also be used for beam real-time monitoring and will make an invaluable contribution to the understanding of the background environment and its topology. PPS is designed for study the central exclusive production pp → p+X+p, where the + signs denote the absence of hadronic activity (that is, the presence of a rapidity gap) between the outgoing protons and the decay products of the central system X. The precise measurement of the kinematical parameters of the outgoing protons enables to study the properties of the central state X. In PPS part we consider the detector for high precision timing of these protons—QUARTIC. It consists of L-shape bars with quartz or sapphire radiator. The time resolution of the QUARTIC prototypes achieved ≈ 10 ps.

  14. Framework to study dynamic dependencies in networks of interacting processes.

    Science.gov (United States)

    Chicharro, Daniel; Ledberg, Anders

    2012-10-01

    The analysis of dynamic dependencies in complex systems such as the brain helps to understand how emerging properties arise from interactions. Here we propose an information-theoretic framework to analyze the dynamic dependencies in multivariate time-evolving systems. This framework constitutes a fully multivariate extension and unification of previous approaches based on bivariate or conditional mutual information and Granger causality or transfer entropy. We define multi-information measures that allow us to study the global statistical structure of the system as a whole, the total dependence between subsystems, and the temporal statistical structure of each subsystem. We develop a stationary and a nonstationary formulation of the framework. We then examine different decompositions of these multi-information measures. The transfer entropy naturally appears as a term in some of these decompositions. This allows us to examine its properties not as an isolated measure of interdependence but in the context of the complete framework. More generally we use causal graphs to study the specificity and sensitivity of all the measures appearing in these decompositions to different sources of statistical dependence arising from the causal connections between the subsystems. We illustrate that there is no straightforward relation between the strength of specific connections and specific terms in the decompositions. Furthermore, causal and noncausal statistical dependencies are not separable. In particular, the transfer entropy can be nonmonotonic in dependence on the connectivity strength between subsystems and is also sensitive to internal changes of the subsystems, so it should not be interpreted as a measure of connectivity strength. Altogether, in comparison to an analysis based on single isolated measures of interdependence, this framework is more powerful to analyze emergent properties in multivariate systems and to characterize functionally relevant changes in the

  15. Processing of toxicological studies results in the statistical program R

    Directory of Open Access Journals (Sweden)

    Fedoseeva Elena Vasilyevna

    2015-09-01

    Full Text Available The presented article is devoted to the analysis of the experimental values and the applicability of the toxicological studies results in the statistical environment R. This freely distributed program has great functional potential and well-designed algorithm, these make it "...the undisputed leader among the freely distributed systems for statistical analysis..." As the data, the experimental results to assess the toxicity of a highly- mineralized sample in the industrial production wastes were used. We evaluated two test-functions: the change in the population increase of cells and the fluorescence level of laboratory culture of the marine diatom algae Phaeodactylum tricornutum. The detailed algorithm of the analysis, namely: data initialization, evaluation of selective parameters of descriptive statistics, toxicity assessment, single-factor analysis of variance (ANOVA, Tukey and Dunnett multiple comparison tests, evaluation of correlation between the observed variable (Spearman and Pearson correlation coefficients are presented in the article. The complete list of scripts in the program R allows to reproduce a similar analysis.

  16. [Study of microbial contamination of processed fresh vegetables and lettuce].

    Science.gov (United States)

    efimochkina, N R; Bykova, I B; Batishcheva, S Iu; Minaeva, L P; Markova, Iu M; Korotkevich, Iu V; Shilov, G Iu; Sheveleva, S A

    2014-01-01

    Investigations of microbial contamination and species composition of the Enterobacteriaceae family in fresh vegetables and lettuce has been conducted. The objects of study were new types of fresh ready-to-eat vegetable foods - salads, sliced vegetables and mixtures thereof, sampled at the main stages of production, including washing, antimicrobial treatment with sodium hypochlorite, and packaging in the film under vacuum. Quantitative analysis of Enterobacteriaceae levels in fresh and packaged vegetables and salads showed that their part in the total amount of microbial contaminants is large enough. Average Enterobacteriaceae content ranged from 2,14 to 3,34 lg cfu/g, reaching in some samples values 4,38-4,74 lg, comparable with the levels of total bacteria. Considerable species diversity of microflora contaminating ready-to-eat vegetable products has been found. Bacteria of the genera Enterobactel; Pantoea, Citrobacter, Serratia, Pseudomonas, Kluyvera, Klebsiella, Escherichia, Rahnella, Acinetobacter were found in the salads and sliced vegetables. In the tested samples most frequently detected Enterobacter spp. - 37% of identified strains and Pantoea spp - 25% of strains. The data on the composition and levels of microbial contaminants in vegetable and salad products highlight not only the need to monitor coliform bacteria - traditional indicators of faecal contamination of raw materials, but also the need to introduce criteria for the amount of Enterobacteriaceae.

  17. Arcmon for Process Control in Silicomanganese Production: A Case Study

    Science.gov (United States)

    Steenkamp, Joalet Dalene; Hockaday, Christopher James; Gous, Johan Petrus; Clark, Wilma; Corfield, Archie

    2017-08-01

    Arcmon is a device that is used to quantify the amount of arcing (expressed as arc power fraction) that takes place in submerged-arc furnaces (SAFs). During a trial installation on a 48-MVA SAF used for the production of SiMn, differences in arcing behavior between the three different electrodes were observed, with the amount of arcing on one electrode being significantly higher than on the other two. During the subsequent excavation of the SAF, the increased amount of arcing had been attributed to the presence of a hard build-up below the electrode. Phase chemical analysis of the hard build-up indicated that it consisted primarily of portlandite (a reaction product of calcium carbide that probably reacted with the water used to cool down the burden during excavation) and silicon carbide. In comparison, the coke-bed below one of the other electrodes consisted mainly of graphite, silicon carbide, and phases which will typically precipitate from slag upon cooling, i.e. phases expected to be present in a coke-bed. The presence of such a large build-up of carbide material is undesirable as it effectively reduces the volume of coke-bed available for the reduction reactions to occur. The study indicated that Arcmon could potentially be applied as an early warning system to identify the presence of such a build-up.

  18. Combining the People Power and the Process Power to Achieve Six Sigma Process Capability——A Case Study

    Institute of Scientific and Technical Information of China (English)

    G; Srinivasan; N; Srinivasa; Gupta

    2002-01-01

    Achieving Six-Sigma process capability starts with l istening to the Voice of the Customers, and it becomes a reality by combining th e People Power and the Process Power of the organisation. This paper presents a Six-Sigma implementation case study carried out in a magnet manufacturing compa ny, which produces bearing magnets to be used in energy meters. If the thickness of the produced bearing magnets is between 2.35 mm and 2.50 mm, they will be ac cepted by the customers. All the time the company coul...

  19. Study of the aging processes in polyurethane adhesives using thermal treatment and differential calorimetric, dielectric, and mechanical techniques ; 1, identifying the aging processes ; 2, quantifying the aging effect

    CERN Document Server

    Althouse, L P

    1979-01-01

    Study of the aging processes in polyurethane adhesives using thermal treatment and differential calorimetric, dielectric, and mechanical techniques ; 1, identifying the aging processes ; 2, quantifying the aging effect

  20. Electroacoustic Process Study of Plasma Sparker Under Different Water Depth

    KAUST Repository

    Huang, Yifan

    2015-01-05

    The plasma sparker has been applied in oceanic high-resolution seismic exploration for decades. Normally it is towed on the water surface. This is suitable for shallow water, but if the water depth is great, the resolution will decrease dramatically, especially in the horizontal direction. This paper proposes the concept of a deep-towed plasma sparker and presents an experimental study of plasma sparker performance in terms of electric parameters, bubble behavior, and acoustic characteristics. The results show that hydrostatic pressure at a source depth ranging from 1 to 2000 m has a negligible influence on the electric parameters but a strong influence on bubble behavior, wherein both the maximum bubble radius and oscillation period are decreased. The collapse pulse vanishes when the source depth reaches 1000 m or deeper, and no bubble oscillation can be distinguished. The source level (evaluated by the expansion pulse) is also decreased as the source depth increases; moreover, the greater the discharge energy, the smaller the source level loss. The discharge energy per electrode should be greater than 20 J for the deep-towed plasma sparker, which can make the source level loss induced by hydrostatic pressure smaller than the transmission loss. The fast Fourier transform (FFT) results show that the dominant energy is around 20 kHz, which is mainly induced by the expansion pulse and its oscillation. According to the simulation results, the fundamental frequency of the acoustic waveform increases with source depth in accord with a log linear trend, and also reaches tens of kilohertz in deep water. So, before the development of deep-towed plasma sparker, a new technical solution will need to be developed to solve this problem. © 1976-2012 IEEE.

  1. Investigating the Facilitator's Role during the Lesson Study Process in High Schools

    Science.gov (United States)

    Vaughn, Stephanie Michelle

    2012-01-01

    Lesson study, a teaching and learning strategy used in Japan, is a new area of consideration for teacher professional development in the United States. An important component of the lesson study process is the role of the facilitator. The intent of this study was to investigate the role of the facilitator in the lesson study process relative to…

  2. The MSFC Collaborative Engineering Process for Preliminary Design and Concept Definition Studies

    Science.gov (United States)

    Mulqueen, Jack; Jones, David; Hopkins, Randy

    2011-01-01

    This paper describes a collaborative engineering process developed by the Marshall Space Flight Center's Advanced Concepts Office for performing rapid preliminary design and mission concept definition studies for potential future NASA missions. The process has been developed and demonstrated for a broad range of mission studies including human space exploration missions, space transportation system studies and in-space science missions. The paper will describe the design team structure and specialized analytical tools that have been developed to enable a unique rapid design process. The collaborative engineering process consists of integrated analysis approach for mission definition, vehicle definition and system engineering. The relevance of the collaborative process elements to the standard NASA NPR 7120.1 system engineering process will be demonstrated. The study definition process flow for each study discipline will be will be outlined beginning with the study planning process, followed by definition of ground rules and assumptions, definition of study trades, mission analysis and subsystem analyses leading to a standardized set of mission concept study products. The flexibility of the collaborative engineering design process to accommodate a wide range of study objectives from technology definition and requirements definition to preliminary design studies will be addressed. The paper will also describe the applicability of the collaborative engineering process to include an integrated systems analysis approach for evaluating the functional requirements of evolving system technologies and capabilities needed to meet the needs of future NASA programs.

  3. Evaluating Process Quality Based on Change Request Data - An Empirical Study of the Eclipse Project

    Science.gov (United States)

    Schackmann, Holger; Schaefer, Henning; Lichter, Horst

    The information routinely collected in change request management systems contains valuable information for monitoring of the process quality. However this data is currently utilized in a very limited way. This paper presents an empirical study of the process quality in the product portfolio of the Eclipse project. It is based on a systematic approach for the evaluation of process quality characteristics using change request data. Results of the study offer insights into the development process of Eclipse. Moreover the study allows assessing applicability and limitations of the proposed approach for the evaluation of process quality.

  4. Life cycle analysis within pharmaceutical process optimization and intensification: case study of active pharmaceutical ingredient production.

    Science.gov (United States)

    Ott, Denise; Kralisch, Dana; Denčić, Ivana; Hessel, Volker; Laribi, Yosra; Perrichon, Philippe D; Berguerand, Charline; Kiwi-Minsker, Lioubov; Loeb, Patrick

    2014-12-01

    As the demand for new drugs is rising, the pharmaceutical industry faces the quest of shortening development time, and thus, reducing the time to market. Environmental aspects typically still play a minor role within the early phase of process development. Nevertheless, it is highly promising to rethink, redesign, and optimize process strategies as early as possible in active pharmaceutical ingredient (API) process development, rather than later at the stage of already established processes. The study presented herein deals with a holistic life-cycle-based process optimization and intensification of a pharmaceutical production process targeting a low-volume, high-value API. Striving for process intensification by transfer from batch to continuous processing, as well as an alternative catalytic system, different process options are evaluated with regard to their environmental impact to identify bottlenecks and improvement potentials for further process development activities.

  5. Crossover of Phonological Processing Skills: A Study of Spanish-Speaking Students in Two Instructional Settings

    Science.gov (United States)

    Leafstedt, Jill M.; Gerber, Michael M.

    2005-01-01

    This study investigated three questions: Do phonological processes show cross-linguistic transfer? How does the language of instruction influence the relationship between phonological processes and decoding? Does performance on Spanish and English phonological processing tasks similarly predict English decoding for the same English learners (ELs)?…

  6. Effects of Business School Student's Study Time on the Learning Process

    Science.gov (United States)

    Tetteh, Godson Ayertei

    2016-01-01

    Purpose: This paper aims to clarify the relationship between the student's study time and the learning process in the higher education system by adapting the total quality management (TQM) principles-process approach. Contrary to Deming's (1982) constancy of purpose to improve the learning process, some students in higher education postpone their…

  7. Crossover of Phonological Processing Skills: A Study of Spanish-Speaking Students in Two Instructional Settings

    Science.gov (United States)

    Leafstedt, Jill M.; Gerber, Michael M.

    2005-01-01

    This study investigated three questions: Do phonological processes show cross-linguistic transfer? How does the language of instruction influence the relationship between phonological processes and decoding? Does performance on Spanish and English phonological processing tasks similarly predict English decoding for the same English learners (ELs)?…

  8. Thought Processes College Students Use When Evaluating Faculty: A Qualitative Study

    Science.gov (United States)

    Pinto, Mary Beth; Mansfield, Phylis M.

    2010-01-01

    This study explores the thought processes college students use when answering survey questions on standardized course/faculty evaluations. Thought processes are categorized as: System One or System Two, based on the framework developed by Kahneman (2003) and Stanovich and West (2000). System One processes are typically hurried, superficial,…

  9. Business process adoption in organisations: A case study from an insurance company in South Africa

    CSIR Research Space (South Africa)

    Luzipo, S

    2015-05-01

    Full Text Available business process analysts to gain an understanding of how business processes are used in this organisation. This was followed by an online survey targeted at 120 business process users for which 65 responses were received. From the results of this study, a...

  10. The scientific study of managing innovations in teaching process at higher education system

    OpenAIRE

    Asanov Naukan Altaevich; Ibragimova Meruert Nurhjigitovna

    2015-01-01

    The scientific study of managing innovations in teaching process at higher education system has been researched in the given article. The researchers’ scientific statements have been separately described.

  11. IN SITU INTERFEROMETRIC STUDY ON THE GELATION PROCESS OF POLYACRYLIC ACID GELS

    Institute of Scientific and Technical Information of China (English)

    Ying Guan; Qiang Chen; Xian-min Zhang; Yu-xing Peng; Jian Xu

    2000-01-01

    In situ interferometry was used to investigate the gelation process of polyacrylic acid (PAA) gels. The basic principle of the in situ interferometry technique is illustrated. It can give sufficient information for non-destructive and successful investigation of the whole gelation process. The effect of initiator concentration on the gelation process was studied. The polymerization rate of AA increases with increasing initiator concentration. The error arising from the thermal effect in the gelation process can be neglected.

  12. Benchmarking healthcare logistics processes: a comparative case study of Danish and US hospitals

    DEFF Research Database (Denmark)

    Feibert, Diana Cordes; Andersen, Bjørn; Jacobsen, Peter

    2017-01-01

    of supply and employee engagement. Based on these decision criteria, performance indicators were developed to enable benchmarking of logistics processes in healthcare. The study contributes to the limited literature on healthcare logistics benchmarking. Furthermore, managers in healthcare logistics......Logistics processes in hospitals are vital in the provision of patient care. Improving healthcare logistics processes provides an opportunity for reduced healthcare costs and better support of clinical processes. Hospitals are faced with increasing healthcare costs around the world and improvement...... initiatives prevalent in manufacturing industries such as lean, business process reengineering and benchmarking have seen an increase in use in healthcare. This study investigates how logistics processes in a hospital can be benchmarked to improve process performance. A comparative case study of the bed...

  13. Gasoline from coal in the state of Illinois: feasibility study. Volume I. Design. [KBW gasification process, ICI low-pressure methanol process and Mobil M-gasoline process

    Energy Technology Data Exchange (ETDEWEB)

    1980-01-01

    Volume 1 describes the proposed plant: KBW gasification process, ICI low-pressure methanol process and Mobil M-gasoline process, and also with ancillary processes, such as oxygen plant, shift process, RECTISOL purification process, sulfur recovery equipment and pollution control equipment. Numerous engineering diagrams are included. (LTN)

  14. Gasoline from coal in the state of Illinois: feasibility study. Volume I. Design. [KBW gasification process, ICI low-pressure methanol process and Mobil M-gasoline process

    Energy Technology Data Exchange (ETDEWEB)

    1980-01-01

    Volume 1 describes the proposed plant: KBW gasification process, ICI low-pressure methanol process and Mobil M-gasoline process, and also with ancillary processes, such as oxygen plant, shift process, RECTISOL purification process, sulfur recovery equipment and pollution control equipment. Numerous engineering diagrams are included. (LTN)

  15. The role of social and ecological processes in structuring animal populations

    NARCIS (Netherlands)

    Farine, D.R.; Firth, J.A.; Aplin, L.M.; Crates, R.A.; Culina, Antica; Garroway, Colin J.; Hinde, C.A.

    2015-01-01

    Both social and ecological factors influence population process and structure, with resultant consequences for phenotypic selection on individuals. Understanding the scale and relative contribution of these two factors is thus a central aim in evolutionary ecology. In this study, we develop a fra

  16. Using ERP and WfM Systems for Implementing Business Processes: An Empirical Study

    Science.gov (United States)

    Aversano, Lerina; Tortorella, Maria

    Software systems mainly considered from enterprises for dealing with a business process automation belong to the following two categories: Workflow Management Systems (WfMS) and Enterprise Resource Planning (ERP) systems. The wider diffusion of ERP systems tends to favourite this solution, but there are several limitations of most ERP systems for automating business processes. This paper reports an empirical study aiming at comparing the ability of implementing business processes of ERP systems and WfMSs. Two different case studies have been considered in the empirical study. It evaluates and analyses the correctness and completeness of the process models implemented by using ERP and WfM systems.

  17. STUDIES ON WETTABILITY OF STAINLESS STEEL 316L POWDER IN LASER MELTING PROCESS

    Directory of Open Access Journals (Sweden)

    KURIAN ANTONY

    2014-10-01

    Full Text Available Laser sintering is one of the techniques used in additive manufacturing processes. The main objective of the work is to study the effects of process parameters on wetting phenomenon and interfacial energy during laser melting of stainless steel powder. This paper reports wetting of laser melted powder particles and its use for the determination of surface energy of stainless steel powder under laser beam exposure. Process parameters such as laser power, scan speed and beam diameter are considered for study. This study also identifies the process parameters for better wettability which produces smooth surfaces.

  18. Longitudinal Case Studies of the Information Search Process of Users in Libraries.

    Science.gov (United States)

    Kuhlthau, Carol Collier

    1988-01-01

    Presents longitudinal case studies of four students in high school and after completion of college to compare their perceptions of the information search process in libraries. Library user studies are discussed, a model of the search process is described, and implications for the design of information systems are suggested. (36 references) (LRW)

  19. A Case Study of the Decision-Making Process of Educational Leaders When Considering Program Implementation

    Science.gov (United States)

    Laird, Scott

    2012-01-01

    The purpose of this study was to discover what school leaders considered during the decision-making process when adding a transitional kindergarten program and how the decision was made. This study investigated the decision-making process for superintendents and principals by examining decisions made by rural, suburban, and large school…

  20. Ethnographic studies as a requirement gathering process for the design of context aware middleware

    DEFF Research Database (Denmark)

    Kjær, Kristian Ellebæk

    2007-01-01

    As a preparation for building service oriented, context aware middleware for agriculture, we have employed ethnographic field studies as a mean in the requirements gathering process.......As a preparation for building service oriented, context aware middleware for agriculture, we have employed ethnographic field studies as a mean in the requirements gathering process....

  1. Frontal Electroencephalogram Asymmetry during Affective Processing in Children with Down Syndrome: A Pilot Study

    Science.gov (United States)

    Conrad, N. J.; Schmidt, L. A.; Niccols, A.; Polak, C. P.; Riniolo, T. C.; Burack, J. A.

    2007-01-01

    Background: Although the pattern of frontal electroencephalogram (EEG) asymmetry during the processing of emotion has been examined in many studies of healthy adults and typically developing infants and children, no published work has used these theoretical and methodological approaches to study emotion processing in children with Down syndrome.…

  2. FURTHER DEVELOPMENT OF THE QUALITATIVE ELLIPSOMETRIC TECHNIQUE FOR THE STUDY OF CORROSION PROCESSES UNDER ORGANIC COATINGS

    OpenAIRE

    Ritter, J; Kruger, J.

    1983-01-01

    We describe the further development of an ellipsometric technique used to study corrosion processes under organic coatings. These developments include the ability to (1) detect the effect of different organic coating, (2) distinguish between surface roughening and film growth or dissolution, and (3) study corrosion processes occurring on separate anodic and cathodic sites.

  3. Lessons Learnt from the Improvement of Customer Support Processes: A Case Study on Incident Management

    Science.gov (United States)

    Jäntti, Marko

    IT Infrastructure Library (ITIL) is the most widely used IT service management framework that provides guidelines how to create, manage and support IT services. Service support processes, such as incident management and problem management, are among the first ITIL processes that organizations start to implement. However, several challenges may exist in the process implementation. The research question of this study is: which issues are important in establishing an ITIL-based incident management process? The main contribution of this paper is to present lessons learnt from an ITIL-based process improvement project that focused on establishing an incident management process in an IS department of a university hospital. Our results show that key issues in implementing incident management are to 1) define the basic concepts of incident management with concrete examples and 2) define process interfaces between incident management and other support processes.

  4. The reduction of irregularities in the use of “process fmea”: a study for a cold stamping process

    Directory of Open Access Journals (Sweden)

    Carla Estorilio

    2011-12-01

    Full Text Available The Failure Mode and Effect Analysis (FMEA is a requirement for ISO/TS 16949. However, researches show nonconformities in its use by automotive suppliers. The objective of this study is to identify these nonconformities, aiming to suggest methods for minimizing this problem. Therefore, questionnaires were applied in seven automotive suppliers and, for each one, ten FMEA`s were analysed. The research identified nonconformities in the use of FMEA for the stamping process and highlighted seven influencing factors. Based on this data, a strategy is suggested. A partially parameterised FMEA spreadsheet is suggested and tested in three suppliers, showing significant improvements.

  5. Stream computing for biomedical signal processing: A QRS complex detection case-study.

    Science.gov (United States)

    Murphy, B M; O'Driscoll, C; Boylan, G B; Lightbody, G; Marnane, W P

    2015-01-01

    Recent developments in "Big Data" have brought significant gains in the ability to process large amounts of data on commodity server hardware. Stream computing is a relatively new paradigm in this area, addressing the need to process data in real time with very low latency. While this approach has been developed for dealing with large scale data from the world of business, security and finance, there is a natural overlap with clinical needs for physiological signal processing. In this work we present a case study of streams processing applied to a typical physiological signal processing problem: QRS detection from ECG data.

  6. Processed meat and colorectal cancer: a quantitative review of prospective epidemiologic studies.

    Science.gov (United States)

    Alexander, Dominik D; Miller, Arthur J; Cushing, Colleen A; Lowe, Kimberly A

    2010-09-01

    A tremendous amount of scientific interest has been generated regarding processed meat consumption and cancer risk. Therefore, to estimate the association between processed meat intake and colorectal cancer (CRC), a meta-analysis of prospective studies was conducted. Twenty-eight prospective studies of processed meat and CRC were identified, of which 20 represented independent nonoverlapping study populations. Summary relative risk estimates (SRREs) for high versus low intake and dose-response relationships were calculated. The SRRE for high (vs. low) processed meat intake and CRC was 1.16 [95% confidence interval (CI): 1.10-1.23] for all studies. Summary associations were modified considerably by sex; the SRRE for men was 1.23 (95% CI: 1.07-1.42) and the SRRE for women was 1.05 (95% CI: 0.94-1.16), based on nine and 13 studies, respectively. Sensitivity analyses did not indicate appreciable statistical variation by tumor site, processed meat groups, or study location. The SRRE for each 30-gram increment of processed meat and CRC was 1.10 (95% CI: 1.05-1.15) based on nine studies, and the SRRE for each incremental serving of processed meat per week was 1.03 (95% CI: 1.01-1.05) based on six studies. Overall, summary associations were weak in magnitude (i.e. most less than 1.20), processed meat definitions and analytical comparisons were highly variable across studies, and isolating the independent effects of processed meat intake is difficult, given the likely influence of confounding by other dietary and lifestyle factors. Therefore, the currently available epidemiologic evidence is not sufficient to support a clear and unequivocal independent positive association between processed meat consumption and CRC.

  7. The negative cascade of incongruent generative study-test processing in memory and metacomprehension.

    Science.gov (United States)

    Thomas, Ayanna Kim; McDaniel, Mark A

    2007-06-01

    Previous research suggests that when participants engage in generative study activities, the processing of text is enhanced and improvements in memory and metacomprehension result. However, few studies have investigated the influence of processes required by the testing situation or the interaction between encoding and retrieval processes on metacomprehension accuracy. The present experiments examine whether the congruency of processes generated during study and required at retrieval affect memory, metacomprehension, and control processes. Study orientation and test type were congruent (i.e., letter-reinsertion: detailed test), incongruent (i.e., letter-reinsertion: conceptual test), or neutral (i.e., read: conceptual test). After generative study, but before testing, participants made metacomprehension predictions for previously studied texts. Controlled strategy selection was measured in Experiment 2. When processes at study and test were congruent, cued recall performance and metacomprehension predictions were more accurate than when study and test were incongruent. For incongruent conditions, metacomprehension predictions were no better than chance; thus, controlled strategy selection was based on inaccurate metacomprehension, thereby further penalizing memory performance relative to congruent conditions. These findings extend a transfer-appropriate processing framework to metacomprehension.

  8. Studies on the finite element simulation in sheet metal stamping processes

    Science.gov (United States)

    Huang, Ying

    The sheet metal stamping process plays an important role in modern industry. With the ever-increasing demand for shape complexity, product quality and new materials, the traditional trial and error method for setting up a sheet metal stamping process is no longer efficient. As a result, the Finite Element Modeling (FEM) method has now been widely used. From a physical point of view, the formability and the quality of a product are influenced by several factors. The design of the product in the initial stage and the motion of the press during the production stage are two of these crucial factors. This thesis focuses on the numerical simulation for these two factors using FEM. Currently, there are a number of commercial FEM software systems available in the market. These software systems are based on an incremental FEM process that models the sheet metal stamping process in small incremental steps. Even though the incremental FEM is accurate, it is not suitable for the initial conceptual design for its needing of detailed design parameters and enormous calculation times. As a result, another type of FEM, called the inverse FEM method or one-step FEM method, has been proposed. While it is less accurate than that of the incremental method, this method requires much less computation and hence, has a great potential. However, it also faces a number of unsolved problems, which limits its application. This motivates the presented research. After the review of the basic theory of the inverse method, a new modified arc-length search method is proposed to find better initial solution. The methods to deal with the vertical walls are also discussed and presented. Then, a generalized multi-step inverse FEM method is proposed. It solves two key obstacles: the first one is to determine the initial solution of the intermediate three-dimensional configurations and the other is to control the movement of nodes so they could only slide on constraint surfaces during the search by

  9. A Process Re-engineering Framework for Reverse Logistics based on a Case Study

    Directory of Open Access Journals (Sweden)

    Hing Kai Chan

    2010-09-01

    Full Text Available Reverse logistics has gained increasing attention in recent years as a channel for companies to achieve operational excellence. The process involves manipulation of returned materials, or even products, which forms a pivotal role in sustainable development throughout the whole supply chains. To make reverse logistics possible, process re-engineering may need to be carried out. However, the processes involved in reengineering are practically complicated. Objectives, benefits, and applicability of any process re-engineering require a careful and detailed strategic planning. This paper aims to propose an easy-to-follow step-by-step framework for practitioners to perform process re-engineering, to learn and identify the critical issues in each step, and to be successful in applying process re-engineering in order to enhance reverse logistics performance. A learner-centred approach is adopted based on a case study of process re-engineering, which is demonstrated in the paper for explanation.

  10. Processes Involved in Chinese and English Writing: A Study of Chinese University Students

    Directory of Open Access Journals (Sweden)

    Meihua Liu

    2013-11-01

    Full Text Available The present study examined the writing processes of 20 L1 writers and 20 L2 writers on a course task of writing a narrative in a Chinese university naturalistic setting, as well as the challenges they encountered and their coping strategies during the processes. Analyses of the data collected via questionnaire, journal and semi-structured interviews revealed that (1 both L1 and L2 writing processes were nonlinear and cyclical, involving a constant interplay of thinking, writing, and revising throughout the process, (2 though having a lot in common, the two groups differed in many aspects regarding the foci of concern during the process of writing the narrative, (3 both groups encountered common challenges as well as those peculiar of their own writing during the composing process, and (4 both groups were resourceful learners. Based on these findings, some suggestions are discussed. Keywords: writing process; narrative; L1; L2; challenge; strategy

  11. Comparison endpoint study of process plasma and secondary electron beam exciter optical emission spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Stephan Thamban, P. L.; Yun, Stuart; Padron-Wells, Gabriel; Hosch, Jimmy W.; Goeckner, Matthew J. [Department of Mechanical Engineering, University of Texas at Dallas, 800W Campbell Road, Richardson, Texas 75080 (United States); Department of Electrical Engineering, University of Texas at Dallas, 800W Campbell Road, Richardson, Texas 75080 (United States); Verity Instruments, Inc., 2901 Eisenhower Street, Carrollton, Texas 75007 (United States); Department of Mathematical Sciences, University of Texas at Dallas, 800 W Campbell Road, Richardson, Texas 75080 (United States)

    2012-11-15

    Traditionally process plasmas are often studied and monitored by optical emission spectroscopy. Here, the authors compare experimental measurements from a secondary electron beam excitation and direct process plasma excitation to discuss and illustrate its distinctiveness in the study of process plasmas. They present results that show excitations of etch process effluents in a SF{sub 6} discharge and endpoint detection capabilities in dark plasma process conditions. In SF{sub 6} discharges, a band around 300 nm, not visible in process emission, is observed and it can serve as a good indicator of etch product emission during polysilicon etches. Based on prior work reported in literature the authors believe this band is due to SiF{sub 4} gas phase species.

  12. A parametric simulation study for solvent co-injection process in bitumen deposits

    Energy Technology Data Exchange (ETDEWEB)

    Yazdani, A.; Alvestad, J.; Kjonsvik, D.; Gilje, E.; Kowalewski, E. [Statoil Canada (Canada)

    2011-07-01

    The extraction of very large Canadian extra heavy oil and bitumen deposits is facing major challenges, such as energy requirements and access to sustainable water resources. Steam assisted gravity drainage (SAGD) is the most common commercial in-situ recovery process used for the extraction but it has many associated economic and environmental challenges. Moreover, current knowledge of the fundamental physics and mechanics involved in the process is not satisfactory. This paper presents a parametric simulation study for a solvent co-injection (SCI) process in bitumen deposits. This process has the potential to improve the efficiency of steam processes as well as to reduce energy use and CO2 emissions. The study contributes to further understanding of the development process. Several operational and geological parameters were evaluated to assess their impact on SAGD operations. The results demonstrated that the basis for selecting the optimum solvent should not only be mobility improvement capability but should also include other operational and geological conditions.

  13. USE OF INFORMATION AND COMMUNICATION TECHNOLOGY IN THE STUDY PROCESS: TEACHERS’ EXPERIENCE

    Directory of Open Access Journals (Sweden)

    Valdonė Indrašienė

    2015-03-01

    Full Text Available Aim: To analyse teachers’ experience in applying information communication technologies (from now on referred to as ICT during the study process. Methodology: The analysis is based on a qualitative research methodology determined by the novelty of the problem under analysis. Six teachers of the University X (faculty Y participating in the study were selected by applying a random sampling procedure and were interviewed by using the semi-structured interviews. Results: The research revealed that the use of ICT in the study process is still fragmented due to the lack of the teachers` ICT competence and to teaching priority given to direct communication. Because of the lack of higher level competence in ICT necessary for the efficient use of ICT tools in the study process, teachers as a rule resort to limited opportunities to increase the attractiveness of the process. Research limitations: in order to theoretically and empirically validate ICT applicationpossibilities in the study process, teachers of one faculty of one university have been interviewed. In view of this, the conclusions cannot be extended to all teachers. Practical significance: the research revealed problems faced by the university teachers in applying ICT during the study process. Identification of problems will facilitate a more efficient use of ICT in the study process, as well as the development of teachers’ qualification. Originality and value: the research provided more information on teachers` competence in using ICT.

  14. Self-specific processing in the default network: a single-pulse TMS study

    OpenAIRE

    Lou, Hans C; Luber, Bruce; Stanford, Arielle; Lisanby, Sarah H.

    2010-01-01

    In examining neural processing specific to the self, primarily by contrasting self-related stimuli with non-self-related stimuli (i.e., self vs. other), neuroimaging studies have activated a consistent set of regions, including medial prefrontal cortex (MPFC), precuneus, and right and left inferior parietal cortex. However, criticism has arisen that this network may not be specific to self-related processing, but instead reflects a more general aspect of cortical processing. For example, it i...

  15. Exploring the role of usability in the software process: a study of Irish software SMEs

    OpenAIRE

    O'Connor, Rory V.

    2009-01-01

    peer-reviewed This paper explores the software processes and usability techniques used by Small and Medium Enterprises (SMEs) that develop web applications. The significance of this research is that it looks at development processes used by SMEs in order to assess to what degree usability is integrated into the process. This study seeks to gain an understanding into the level of awareness of usability within SMEs today and their commitment to usability in practice. The motivation ...

  16. How to implement process-oriented care: a case study on the implementation of process-oriented in-hospital stroke care.

    NARCIS (Netherlands)

    Vos, L.; Oostenbrugge, R.J. van; Limburg, M.; Merode, G.G. van; Groothuis, S.

    2009-01-01

    Dutch hospitals are in the midst of a transition towards process-oriented organisation to realise optimal and undisturbed care processes. Between 2004 and 2007, the University Hospital of Maastricht conducted a case study implementing process-oriented in-hospital stroke unit care. The case study

  17. [Comparative study on decoction and dissolution of crude and processed corni fructus].

    Science.gov (United States)

    Zhou, Han-Yu; Yang, Pei-Pei; Cong, Xiao-Dong; Zhang, Cheng-Rong; Cai, Bao-Chang

    2013-11-01

    To compare and study the decoction and dissolution of active constituents in crude and processed Corni Fructus. HPLC, the traditional Chinese medicine (TCM) decoction method and the dissolution methods were adopted to compare and study the decoction yield and dissolution rate of loganin and morroniside, active constituents in crude and processed Corni Fructus. The results showed that the content of active constituents loganin and morroniside in crude and processed Corni Fructus did not change significantly; compared with crude Corni Fructus, processed Corni Fructus (decoction) contained much higher loganin, with no obvious change in morroniside; compared with crude Corni Fructus, processed Corni Fructus (extracts) showed no significant difference in loganin dissolution, but notable increase in morroniside dissolution in intestinal fluid; in gastric fluid, processed Corni Fructus showed significant increase in loganin and morroniside dissolutions. However, in comprehensive consideration of the decoction dose in clinical administration, and calculated on the basis of the formula of the decoction yield x dissolution rate = decoction-dissolution product, it showed increase in the decoction-dissolution products of both of the active constituents loganin and morroniside, with significant difference. This suggested that processed Corni Fructus is superior to crude Corni Fructus in clinical application. In this article, we proposed to compare the changes in decoction and dissolution of active constituents in crude and processed Corni Fructus, study the decoction-dissolution product, and then apply it in the quality evaluation of crude and processed Corni Fructus.

  18. A Comparative Study on Retirement Process in Korea, Germany, and the United States: Identifying Determinants of Retirement Process.

    Science.gov (United States)

    Cho, Joonmo; Lee, Ayoung; Woo, Kwangho

    2016-10-01

    This study classifies the retirement process and empirically identifies the individual and institutional characteristics determining the retirement process of the aged in South Korea, Germany, and the United States. Using data from the Cross-National Equivalent File, we use a multinomial logistic regression with individual factors, public pension, and an interaction term between an occupation and an education level. We found that in Germany, the elderly with a higher education level were more likely to continue work after retirement with a relatively well-developed social support system, while in Korea, the elderly, with a lower education level in almost all occupation sectors, tended to work off and on after retirement. In the United States, the public pension and the interaction terms have no statistically significant impact on work after retirement. In both Germany and Korea, receiving a higher pension decreased the probability of working after retirement, but the influence of a pension in Korea was much greater than that of Germany. In South Korea, the elderly workers, with lower education levels, tended to work off and on repeatedly because there is no proper security in both the labor market and pension system.

  19. Processing expected and unexpected uncertainty is modulated by fearless-dominance personality traits - An exploratory ERP study on feedback processing.

    Science.gov (United States)

    Kogler, Lydia; Sailer, Uta; Derntl, Birgit; Pfabigan, Daniela M

    2017-01-01

    Expectancy and certainty regarding an outcome are important factors during performance monitoring. However, the separate contributions of expected and unexpected uncertainty on different measures of performance monitoring, including feedback-related negativity (FRN) and P300 components, are not well established. The current study investigated their relationship to fearless-dominance, a personality construct described by high social potency and low anxiety. Accurately predicting environmental outcomes in certain and uncertain situations might be a prerequisite of social potency, therefore it may be associated with increased performance monitoring and its ERP correlates. Consequently, expected-uncertain and unexpected-uncertain feedback (by violating previously learned certain and expected feedback) was introduced in addition to expected-certain feedback in healthy individuals during a probabilistic gambling task. In both FRN and P300 components, difference waves were more pronounced for unexpected-uncertain and expected-uncertain compared to expected-certain feedback. Moreover, more fearless-dominant individuals showed diminished feedback processing specifically in expected-uncertain trials, but concurrently enhanced attentional processing in expected-certain trials. These findings indicate adaptive and situation-appropriate utilization of performance monitoring resources in individuals with more pronounced fearless-dominance personality traits. The results indicate that a precise differentiation of expected and unexpected uncertainty in fearless-dominant individuals is mandatory in order to better understand the underlying personality construct and related behavior.

  20. Study on the physical basis of pressure and particle velocity combine processing

    Institute of Scientific and Technical Information of China (English)

    HUI Junying; LIU Hong; YU Huabing; FAN Minyi; LIANG Guolong

    2001-01-01

    Some basic studies of pressure and particle velocity combine processing such as correlation between them, average acoustic intensity processing, rotating and sharpening of directivity are described. Preliminary results based on theoretical analysis and lake trail will lay a foundation for further research.