WorldWideScience

Sample records for network circle santa

  1. Social Circles Detection from Ego Network and Profile Information

    Science.gov (United States)

    2014-12-19

    0704-0188 3. DATES COVERED (From - To) - UU UU UU UU Approved for public release; distribution is unlimited. Social Circles Detection from Ego Network...Research Triangle Park, NC 27709-2211 ego network, social copying community REPORT DOCUMENTATION PAGE 11. SPONSOR/MONITOR’S REPORT NUMBER(S) 10. SPONSOR...ABSTRACT Social Circles Detection from Ego Network and Profile Information Report Title This report presents a study making our first approach to the

  2. Relationships, networks and innovation - Squaring the circle?

    DEFF Research Database (Denmark)

    Goduscheit, René Chester

    2009-01-01

    The virtue of interorganisational networks as the locus of innovation is widely acknowledged. However, it is often neglected that interorganisational collaboration does not automatically lead to idea generation and the exploration of new possibilities. On the basis of a case study from the Danish...

  3. Relationships, networks and innovation - squaring the circle?

    DEFF Research Database (Denmark)

    Goduscheit, René Chester

    2009-01-01

    The virtue of interorganisational networks as the locus of innovation is widely acknowledged. However, it is often neglected that interorganisational collaboration does not automatically lead to idea generation and the exploration of new possibilities. On the basis of a case study from the Danish...

  4. Using Social Networks and ICTs to Enhance Literature Circles: A Practical Approach

    Science.gov (United States)

    Walker, Andrea

    2010-01-01

    The purpose of this paper is to describe and demonstrate how social networks such as "Facebook" and "Goodreads", and information and communication technologies (ICTs) tools like laptops and iPods can support and enhance literature circles. The innovation described is implemented by the library and aims to promote reading for…

  5. [Quality circle in a trauma network of the German Association for Trauma Surgery. Upgrading patient care].

    Science.gov (United States)

    Ernstberger, A; Koller, M; Nerlich, M

    2011-02-01

    In industry, especially in the automobile industry, improvements in efficiency could be demonstrated by quality management and quality circles. There is no doubt that in medicine, major trauma is also a very complex challenge.The German Association for Trauma Surgery published the White Paper on the Management of the Seriously Injured in 2006. The White Paper specifies the demand for quality of care, sets the level of structural requirements for trauma care and postulates the cooperation of regional hospitals within a network of dedicated trauma centres. The Trauma Network Eastern Bavaria (TNO) was the first certified trauma network in Germany. One of the reasons for this success is the fact that cooperation between trauma surgeons has already had a long tradition in this geographic area. The key factor is communication which is supported by all technical and organisational means. The formal installation of quality circles on each level of trauma care, e.g. within and across institutions, was accepted by all partners within the network. The goal is the improvement of patient care in trauma above and beyond the guidelines of the White Paper. This paper shows the instruments used to enhance the quality of trauma care within a network.

  6. [Child protection network and the intersector implementation of the circle of security as alternatives to medication].

    Science.gov (United States)

    Becker, Ana Laura Martins M M; de Souza, Paulo Haddad; de Oliveira, Mônica Martins; Paraguay, Nestor Luiz Bruzzi B

    2014-09-01

    To describe the clinical history of a child with aggressive behavior and recurring death-theme speech, and report the experience of the team of authors, who proposed an alternative to medication through the establishment of a protection network and the inter-sector implementation of the circle of security concept. A 5-year-old child has a violent and aggressive behavior at the day-care. The child was diagnosed by the healthcare center with depressive disorder and behavioral disorder, and was medicated with sertraline and risperidone. Side effects were observed, and the medications were discontinued. Despite several actions, such as talks, teamwork, psychological and psychiatric follow-up, the child's behavior remained unchanged. A unique therapeutic project was developed by Universidade Estadual de Campinas' Medical School students in order to establish a connection between the entities responsible for the child's care (daycare center, healthcare center, and family). Thus, the team was able to develop a basic care protection network. The implementation of the inter-sector circle of security, as well as the communication and cooperation among the teams, produced very favorable results in this case. This initiative was shown to be a feasible and effective alternative to the use of medication for this child. Copyright © 2014 Sociedade de Pediatria de São Paulo. Publicado por Elsevier Editora Ltda. All rights reserved.

  7. The combination of circle topology and leaky integrator neurons remarkably improves the performance of echo state network on time series prediction.

    Science.gov (United States)

    Xue, Fangzheng; Li, Qian; Li, Xiumin

    2017-01-01

    Recently, echo state network (ESN) has attracted a great deal of attention due to its high accuracy and efficient learning performance. Compared with the traditional random structure and classical sigmoid units, simple circle topology and leaky integrator neurons have more advantages on reservoir computing of ESN. In this paper, we propose a new model of ESN with both circle reservoir structure and leaky integrator units. By comparing the prediction capability on Mackey-Glass chaotic time series of four ESN models: classical ESN, circle ESN, traditional leaky integrator ESN, circle leaky integrator ESN, we find that our circle leaky integrator ESN shows significantly better performance than other ESNs with roughly 2 orders of magnitude reduction of the predictive error. Moreover, this model has stronger ability to approximate nonlinear dynamics and resist noise than conventional ESN and ESN with only simple circle structure or leaky integrator neurons. Our results show that the combination of circle topology and leaky integrator neurons can remarkably increase dynamical diversity and meanwhile decrease the correlation of reservoir states, which contribute to the significant improvement of computational performance of Echo state network on time series prediction.

  8. The combination of circle topology and leaky integrator neurons remarkably improves the performance of echo state network on time series prediction.

    Directory of Open Access Journals (Sweden)

    Fangzheng Xue

    Full Text Available Recently, echo state network (ESN has attracted a great deal of attention due to its high accuracy and efficient learning performance. Compared with the traditional random structure and classical sigmoid units, simple circle topology and leaky integrator neurons have more advantages on reservoir computing of ESN. In this paper, we propose a new model of ESN with both circle reservoir structure and leaky integrator units. By comparing the prediction capability on Mackey-Glass chaotic time series of four ESN models: classical ESN, circle ESN, traditional leaky integrator ESN, circle leaky integrator ESN, we find that our circle leaky integrator ESN shows significantly better performance than other ESNs with roughly 2 orders of magnitude reduction of the predictive error. Moreover, this model has stronger ability to approximate nonlinear dynamics and resist noise than conventional ESN and ESN with only simple circle structure or leaky integrator neurons. Our results show that the combination of circle topology and leaky integrator neurons can remarkably increase dynamical diversity and meanwhile decrease the correlation of reservoir states, which contribute to the significant improvement of computational performance of Echo state network on time series prediction.

  9. 3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, and River Reservation, Arapaho and Shoshone Tribes, Wyoming

    Energy Technology Data Exchange (ETDEWEB)

    La Pointe, Paul R.; Hermanson, Jan

    2002-09-09

    The goal of this project is to improve the recovery of oil from the Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models.

  10. Solving Problems through Circles

    Science.gov (United States)

    Grahamslaw, Laura; Henson, Lisa H.

    2015-01-01

    Several problem-solving interventions that utilise a "circle" approach have been applied within the field of educational psychology, for example, Circle Time, Circle of Friends, Sharing Circles, Circle of Adults and Solution Circles. This research explored two interventions, Solution Circles and Circle of Adults, and used thematic…

  11. [The regionalized healthcare network in Santa Catarina State, Brazil, from 2011 to 2015: governance system and oral healthcare].

    Science.gov (United States)

    Godoi, Heloisa; Andrade, Selma Regina de; Mello, Ana Lúcia Schaefer Ferreira de

    2017-09-28

    : The objective was to describe the governance system used in structuring the regionalized healthcare network in Santa Catarina State, Brazil, based on the Bipartite Inter-Managerial Commission (CIB), with a focus on structuring of oral healthcare. This was a qualitative, exploratory-descriptive documental study, based on the foundations of governance as an analytical tool through identification of the dimensions actors, norms, nodal points, and processes. Secondary data were collected from the minutes of CIB meetings held from January 2011 to December 2015. The analysis shows weaknesses in CIB governance in Santa Catarina in relation to regionalized structuring of oral healthcare from a network perspective. Structuring of oral healthcare occurs in parallel to that of other thematic networks in the state and shows the expansion of dental services, especially those with medium complexity, as an effect of the prevailing governance process. The relations established between administrators and decision-making processes allowed recognizing this network's "prescription", since there is little negotiation and local demand, limited more to following recommendations and incentives from the federal/state sphere, intermediated by staff from the State Health Secretariat. Thus, setting a policy agenda for oral healthcare for the population of Santa Catarina is weakened, with a peripheral position in relation to other health programs.

  12. Bridging Social Circles: Need for Cognition, Prejudicial Judgments, and Personal Social Network Characteristics

    Science.gov (United States)

    Curşeu, Petru L.; de Jong, Jeroen P.

    2017-01-01

    Various factors pertaining to the social context (availability of plausible social contacts) as well as personality traits influence the emergence of social ties that ultimately compose one’s personal social network. We build on a situational selection model to argue that personality traits influence the cognitive processing of social cues that in turn influences the preference for particular social ties. More specifically, we use a cross-lagged design to test a mediation model explaining the effects of need for cognition (NFC) on egocentric network characteristics. We used the data available in the LISS panel, in which a probabilistic sample of Dutch participants were asked to fill in surveys annually. We tested our model on data collected in three successive years and our results show that people scoring high in NFC tend to revolve in information-rich egocentric networks, characterized by high demographic diversity, high interpersonal dissimilarity, and high average education. The results also show that the effect of NFC on social network characteristics is mediated by non-prejudicial judgments. PMID:28790948

  13. Literature Circles.

    Science.gov (United States)

    Katz, Claudia Anne; Kuby, Sue Ann

    2002-01-01

    Describes the use of literature circles, a student-led reading and discussion method that encourages students to see stories in various ways. Explains the student selection of titles, roles of group members, and collaborative projects that complete the activity. (LRW)

  14. Vygotsky circle as a personal network of scholars: restoring connections between people and ideas.

    Science.gov (United States)

    Yasnitsky, Anton

    2011-12-01

    The name of Lev Vygotsky (1896-1934) is well-known among contemporary psychologists and educators. The cult of Vygotsky, also known as "Vygotsky boom", is probably conducive to continuous reinterpretation and wide dissemination of his ideas, but hardly beneficial for their understanding as an integrative theory of human cultural and biosocial development. Two problems are particularly notable. These are, first, numerous gaps and age-old biases and misconceptions in the historiography of Soviet psychology, and, second, the tendency to overly focus on the figure of Vygotsky to the neglect of the scientific activities of a number of other protagonists of the history of cultural-historical psychology. This study addresses these two problems and reconstructs the history and group dynamics within the dense network of Vygotsky's collaborators and associates, and overviews their research, which is instrumental in understanding Vygotsky's integrative theory in its entirety as a complex of interdependent ideas, methods, and practices.

  15. Small circles

    DEFF Research Database (Denmark)

    Ling, Richard; Bjelland, Johannes; Sundsøy, Pål

    2014-01-01

    This article examines how we use mobile telephony to maintain our physically and socially closest social circle. The analysis is based on traffic data gathered from Norway using approximately 24 million calls and texts made by private individuals. Previous research has shown that our temporal and...... as information and communication technologies (ICTs) potentially put the world at our fingertips, the mobile phone is an instrument of a more limited geographical and social sphere. Approximately two-thirds of our calls/texts go to strong ties that are within a 25-km radius.......This article examines how we use mobile telephony to maintain our physically and socially closest social circle. The analysis is based on traffic data gathered from Norway using approximately 24 million calls and texts made by private individuals. Previous research has shown that our temporal...

  16. Research circles

    DEFF Research Database (Denmark)

    Nordentoft, Helle Merete; Thomsen, Rie; Möller, Jonas

    It is key challenge to continuously develop guidance practices to meet participants´ needs and demands from policy makers. The European Lifelong Guidance Policy Network (ELGPN) states that the guidance practitioner and citizens/users should be the focus of development of international and nationa...

  17. Random Circles and Fields on Circles.

    Science.gov (United States)

    1986-05-01

    p is on the true circle C ; X is the corresponding radius of the random circle -5- Examples and comments Let W be a Wiener process on 3+, let a > 0 be...properties on C when M = W, it is expected that X be the analog of the Ornstein-Uhlenbeck process on the circle C . Indeed, the representation (2.12) shows this...evolution in time of a random field on the circle C . -35- The message of the following theorem is that the sections of X are all stationary and Markov

  18. 3-D RESERVOIR AND STOCHASTIC FRACTURE NETWORK MODELING FOR ENHANCED OIL RECOVERY, CIRCLE RIDGE PHOSPHORIA/TENSLEEP RESERVOIR, WIND RIVER RESERVATION, ARAPAHO AND SHOSHONE TRIBES, WYOMING

    Energy Technology Data Exchange (ETDEWEB)

    Paul La Pointe; Jan Hermanson; Robert Parney; Thorsten Eiben; Mike Dunleavy; Ken Steele; John Whitney; Darrell Eubanks; Roger Straub

    2002-11-18

    This report describes the results made in fulfillment of contract DE-FG26-00BC15190, ''3-D Reservoir and Stochastic Fracture Network Modeling for Enhanced Oil Recovery, Circle Ridge Phosphoria/Tensleep Reservoir, Wind River Reservation, Arapaho and Shoshone Tribes, Wyoming''. The goal of this project is to improve the recovery of oil from the Tensleep and Phosphoria Formations in Circle Ridge Oilfield, located on the Wind River Reservation in Wyoming, through an innovative integration of matrix characterization, structural reconstruction, and the characterization of the fracturing in the reservoir through the use of discrete fracture network models. Fields in which natural fractures dominate reservoir permeability, such as the Circle Ridge Field, often experience sub-optimal recovery when recovery processes are designed and implemented that do not take advantage of the fracture systems. For example, a conventional waterflood in a main structural block of the Field was implemented and later suspended due to unattractive results. It is estimated that somewhere less than 20% of the OOIP in the Circle Ridge Field have been recovered after more than 50 years' production. Marathon Oil Company identified the Circle Ridge Field as an attractive candidate for several advanced IOR processes that explicitly take advantage of the natural fracture system. These processes require knowledge of the distribution of matrix porosity, permeability and oil saturations; and understanding of where fracturing is likely to be well-developed or poorly developed; how the fracturing may compartmentalize the reservoir; and how smaller, relatively untested subthrust fault blocks may be connected to the main overthrust block. For this reason, the project focused on improving knowledge of the matrix properties, the fault block architecture and to develop a model that could be used to predict fracture intensity, orientation and fluid flow/connectivity properties. Knowledge

  19. Circles of Confidence in Correspondence: Modeling Confidentiality and Secrecy in Knowledge Exchange Networks of Letters and Drawings in the Early Modern Period.

    Science.gov (United States)

    van den Heuvel, Charles; Weingart, Scott B; Spelt, Nils; Nellen, Henk

    2016-01-01

    Science in the early modern world depended on openness in scholarly communication. On the other hand, a web of commercial, political, and religious conflicts required broad measures of secrecy and confidentiality; similar measures were integral to scholarly rivalries and plagiarism. This paper analyzes confidentiality and secrecy in intellectual and technological knowledge exchange via letters and drawings. We argue that existing approaches to understanding knowledge exchange in early modern Europe--which focus on the Republic of Letters as a unified entity of corresponding scholars--can be improved upon by analyzing multilayered networks of communication. We describe a data model to analyze circles of confidence and cultures of secrecy in intellectual and technological knowledge exchanges. Finally, we discuss the outcomes of a first experiment focusing on the question of how personal and professional/official relationships interact with confidentiality and secrecy, based on a case study of the correspondence of Hugo Grotius.

  20. Circle diffeomorphisms forced by expanding circle maps

    NARCIS (Netherlands)

    Homburg, A.J.

    2012-01-01

    We discuss the dynamics of skew product maps defined by circle diffeomorphisms forced by expanding circle maps. We construct an open class of such systems that are robustly topologically mixing and for which almost all points in the same fiber converge under iteration. This property follows from the

  1. Caution: Quality Circles Ahead.

    Science.gov (United States)

    Metz, Edmund J.

    1981-01-01

    While articles written about quality circles are always positive, there are negative aspects to such programs, and there have been programs which have failed. This article describes the advantages and disadvantages of Quality Circle Programs. (JOW)

  2. Quality Circle Competencies.

    Science.gov (United States)

    Reeves, Cecil

    The assessment instrument to be used with seven monographs relating to quality circles, this booklet is used to evaluate quality circle competencies for participants attending Quality Circle Training Institutes. The assessment instrument contains nine competency areas for evaluating effectiveness of participants on a scale from 1 (ineffective) to…

  3. Quality Circles for School Districts.

    Science.gov (United States)

    Zahra, Shaker A.; And Others

    1985-01-01

    Discusses the applicability of quality circles in schools. Examines elements of a successful quality circle program, the decision to have such a program, establishing quality circles, potential problems, and the use of quality circles in school districts. (CT)

  4. Maxi-circles and mini-circles in kinetoplast DNA from Trypanosoma cruzi.

    NARCIS (Netherlands)

    W. Leon; A.C.C. Frasch; J.H.J. Hoeijmakers (Jan); F. Fase-Fowler; P. Borst (Piet); F. Brunel; J. Davison

    1980-01-01

    textabstractMaxi-circles are a minor component of kinetoplast DNAs from all trypanosomatids studied, but they have not previously been found in Trypanosoma cruzi; We have spread intact kinetoplast DNA from the epimastigotes of strain Y in protein monolayers and analysed the mini-circle networks by

  5. "Meth circles" and "pipe pirates": crystal methamphetamine smoking and identity management among a social network of young adults.

    Science.gov (United States)

    Green, Rachael; Moore, David

    2013-06-01

    This article analyzes crystal methamphetamine smoking among a social network of young Australian adults. Ethnographic data were collected from 2005 to 2007 among 60 individuals, and semistructured in-depth interviews were conducted with a sub-set of 25 individuals. Fieldnotes and interview transcripts were entered into NVivo7 and thematically analyzed. We argue that although drug use may be considered "normal" among some social networks, the management of stigma associated with drug use is more complex and contested than portrayed in the literature. Policy implications are discussed. The study was supported by funds from Australia's National Health and Medical Research Council.

  6. The Quality Circle Concept.

    Science.gov (United States)

    Hawley, David

    1985-01-01

    Quality Circle members identify problems, select one for attention, analyze the potential causes of the problem, and identify and select preferred solutions that are proposed to the administration. Skills, knowledge, and experience gained by people in an education Quality Circle become theirs as well as those of the school. (MLF)

  7. Polygons and Their Circles

    Science.gov (United States)

    Stephenson, Paul

    2009-01-01

    In order to find its circumference, Archimedes famously boxed the circle between two polygons. Ending the first of a series of articles (MT179) with an aside, Francis Lopez-Real reverses the situation to ask: Which polygons can be boxed between two circles? (The official term for such polygons is "bicentric".) The sides of these polygons are…

  8. General minisum circle location

    DEFF Research Database (Denmark)

    Körner, Mark; Brimberg, Jack; Juel, Henrik

    2009-01-01

    In our paper we approximate a set of given points by a general circle. More precisely, we consider the problem of locating and scaling the unit ball of some given norm k1 with respect to xed points on the plane such that the sum of weighted distances between the circle and the xed points...

  9. The experience of meaning in circle dance

    Science.gov (United States)

    Borges da Costa, Ana L.; Cox, Diane L.

    2016-01-01

    ABSTRACT Circle dance, which derives from the tradition of folk dances, is practised worldwide. This article explores the meanings participants attribute to it. In-depth interviews with 39 participants, teachers and coordinators of teacher training programmes from the circle dance network in the United Kingdom were undertaken. Applying a constructivist grounded theory approach, major categories, representing respectively the experiences of circle dance participants, teachers and coordinators, were developed. This article specifically focuses on the first major category, termed “I can't imagine life without it”, which relates to the experience of 22 dancers. From an occupational perspective, the study reveals how participants realise a sense of meaning and satisfaction through engagement in circle dance and the potential contribution of this occupation to well-being. PMID:27366111

  10. Quality Circles in Education.

    Science.gov (United States)

    Curran, Mary

    1983-01-01

    Discusses the use of quality circles in vocational education as a preparation for students entering the world of work. (Marketing and Distributive Education Association, 1908 Association Dr., Reston, VA 22091) (JOW)

  11. Santa Muerte

    OpenAIRE

    Fraser, A; The Photographers' Gallery; Trolley Books; Bar-Tur Foundation; Arts Council England

    2015-01-01

    The origins of Santa Muerte - a religion/cult that has been denounced as satanic by the Mexican Catholic Church - can be dated back hundreds of years. It was developed through a syncretism between indigenous Mesoamerican and Spanish Catholic beliefs and practices. Only in the last decade however has it become more predominant in Mexican society, where many commentators have noted its rise with the killing and violence associated with the war between rival drug cartels and the Mexican Governme...

  12. Quality Circles and Library Management.

    Science.gov (United States)

    Sell, Daniel; Mortola, Mary Ellen

    1985-01-01

    Discusses the use of quality circles within the college library. Defines a quality circle; examines the history, philosophy, characteristics, and objectives of quality circles; discusses the relationship of quality circles with library management; and explains their creation, implementation, benefits and limitations. (DMM)

  13. Differentiating through Literature Circles

    Science.gov (United States)

    Helgeson, John

    2017-01-01

    This article begins with an example of a typical middle-school experience with literature circles. Students read a common text and come prepared to share and discuss the text based on individual roles they are assigned. Teachers are using this practice to address the complexity levels of texts in order to help students develop the skills they need…

  14. Why Story Circle Matters

    Science.gov (United States)

    Lyon, George Ella

    2016-01-01

    If adult attention is screen scrambled, what about kids, whose brains are still developing? In a world where we are over stimulated and hyperlinked-in we are deprived of the kind of time with a person or experience that deepens and sustains us. Here, poet laureate George Ella Lyon writes that the story circle can be such an experience. A school…

  15. Dynamics on the Circle

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 8; Issue 11. Dynamics on the Circle - Interval Dynamics and Rotation Number. Siddhartha Gadgil. General Article Volume 8 Issue 11 November ... Author Affiliations. Siddhartha Gadgil1. Stat-Math Unit Indian Statistical Institute Bangalore 560 064, India.

  16. Q-circle measurement error

    Science.gov (United States)

    Hearn, Chase P.; Bradshaw, Edward S.

    1991-05-01

    High-Q lumped and distributed networks near resonance are generally modeled as elementary three element RLC circuits. The widely used Q-circle measurement technique is based on this assumption. It is shown that this assumption can lead to errors when measuring the Q-factor of more complex resonators, particularly when heavily loaded by the external source. In the Q-circle technique, the resonator is assumed to behave as a pure series (or parallel) RLC circuit and the intercept frequencies are found experimentally at which the components of impedance satisfy the absolute value of Im(Z) = Re(Z) (unloaded Q) and absolute value of Im(Z) = Ro+Re(Z) (loaded Q). The Q-factor is then determined as the ratio of the resonant frequency to the intercept bandwidth. This relationship is exact for simple series or parallel RLC circuits, regardless of the Q-factor, but not for more complex circuits. This is shown to be due to the fact that the impedance components of the circuit vary with frequency differently from those in a pure series RLC circuit, causing the Q-factor as determined above to be in error.

  17. Quality Circles Improve School Operations.

    Science.gov (United States)

    Ladwig, Dennis J.

    1983-01-01

    Quality Circles are a participative management technique allowing employees opportunities to participate in decisionmaking and problem-solving processes at work. A Wisconsin vocational school successfully implemented Quality Circles with management and nonmanagement staff participating. (MD)

  18. Training Needs of Quality Circles.

    Science.gov (United States)

    Smeltzer, Larry R.; Kedia, Ben L.

    1987-01-01

    Quality circle training has been adapted from Japan, but United States training needs are very different. A survey of quality circle members indicated they perceived human relations skills to be significantly more important than problem-analysis skills. (CH)

  19. Quality Circles: Making Schools Productive.

    Science.gov (United States)

    Bellanca, James A.

    1982-01-01

    Describes a training format that gives educators the skills to use quality circles. The three parts of this training program are examined: the ABC's of quality circles, leader training, and facilitator training. (CT)

  20. Locating Problems with Quality Circles.

    Science.gov (United States)

    White, Donald D.; Bednar, David A.

    1985-01-01

    Five categories of common quality circles problems are identified to help firms anticipate difficulties and avert circle failures. These categories include encountered internal problems, encountered external problems, created internal problems, created external problems, and interface problems. Solutions are suggested. (CT)

  1. Improving Education Through Quality Circles.

    Science.gov (United States)

    Hunnicutt, David

    1987-01-01

    This article provides an overview of quality circles and suggests the integration through quality circles of administration, faculty, and staff in the decision-making process to enhance educational productivity and quality. (MT)

  2. Layered circle packings

    Directory of Open Access Journals (Sweden)

    David Dennis

    2005-01-01

    Full Text Available Given a bounded sequence of integers {d0,d1,d2,…}, 6≤dn≤M, there is an associated abstract triangulation created by building up layers of vertices so that vertices on the nth layer have degree dn. This triangulation can be realized via a circle packing which fills either the Euclidean or the hyperbolic plane. We give necessary and sufficient conditions to determine the type of the packing given the defining sequence {dn}.

  3. A game magically circling

    DEFF Research Database (Denmark)

    Ejsing-Duun, Stine

    2011-01-01

    This chapter analyses the relationship between players, the game world, and the ordinary world in alternative reality games (ARGs) and location-based games (LBGs). These games use technology to create a game world in the everyday scene. The topic of this chapter is the concept of the 'magic circle......', which defines the relationship between play and the ordinary world, and how this concept relates to a new kind of game....

  4. Domain Discretization and Circle Packings

    DEFF Research Database (Denmark)

    Dias, Kealey

    , and the edges are geodesic segments (Euclidean, hyperbolic, or spherical) connecting centers of circles that are tangent to each other. Three circles that are mutually tangent form a face of the triangulation. Since circle packing is closely related to triangulation, circle packing methods can be applied...... to domain discretization problems such as triangulation and unstructured mesh generation techniques. We wish to ask ourselves the question: given a cloud of points in the plane (we restrict ourselves to planar domains), is it possible to construct a circle packing preserving the positions of the vertices...

  5. Circle of Form

    DEFF Research Database (Denmark)

    Jaeger, Thomas Arvid

    2012-01-01

    of architecture, design, art, art theory, and perception. It was then obvious in related areas to look for systems or models which organized opposites. The colour system has the same fundamental dualistic structure based on complementary colours, on light and dark (black and white), cold and warm. Inspired...... by this model, and using the knowledge gathered from the other areas, especially perception psychology, it showed to be a possible way to organize contrasts in form, a system of 4 different opposites, geometric, organic, mass and structure: The Circle of Form....

  6. [Willis and his circle].

    Science.gov (United States)

    van Gijn, Jan; Gijselhart, Joost P

    2012-01-01

    Thomas Willis (1621-1675) grew up in Wiltshire and studied medicine in Oxford, at a time when the city was besieged and then occupied by Parliamentarian troops. He started his career as a country doctor while concurrently taking part in informal gatherings with other scientists (William Petty, Christopher Wren and, later on, Robert Hooke, Richard Lower and Robert Boyle). They performed physical and chemical experiments and carried out a variety of tests on animals. After the restoration of the monarchy in 1660 Willis combined his practice with academic teaching. From then on he focused his studies on the structure and function of the brain, dissecting brains after removal from the skull and fixation in 'spirit of wine'. In his 'Cerebri anatome' of 1664, illustrated by Wren, he drew attention to the arterial circle at the base of the brain, including its physiological advantages. This arterial circle had been incompletely described by others in the past and fully, but only in writing, by Wepfer in 1658.

  7. Circle of Ashes

    Science.gov (United States)

    2006-01-01

    [figure removed for brevity, see original site] Circle of Ashes This plot tells astronomers that a pulsar, the remnant of a stellar explosion, is surrounded by a disk of its own ashes. The disk, revealed by the two data points at the far right from NASA's Spitzer Space Telescope, is the first ever found around a pulsar. Astronomers believe planets might rise up out of these stellar ashes. The data in this plot, or spectrum, were taken by ground-based telescopes and Spitzer. They show that light from around the pulsar can be divided into two categories: direct light from the pulsar, and light from the dusty disk swirling around the pulsar. This excess light was detected by Spitzer's infrared array camera. Dust gives off more infrared light than the pulsar because it's cooler. The pulsar, called 4U 0142+61, was once a massive star, until about 100,000 years ago, when it blew up in a supernova explosion and scattered dusty debris into space. Some of that debris was captured into what astronomers refer to as a 'fallback disk,' now circling the leftover stellar core, or pulsar. The disk resembles protoplanetary disks around young stars, out of which planets are thought to be born. The data have been corrected to remove the effects of light scattering from dust that lies between Earth and the pulsar. The ground-based data is from the Keck I telescope atop Mauna Kea, Hawaii.

  8. Recumbent Stone Circles

    Science.gov (United States)

    Ruggles, Clive L. N.

    During the 1970s and early 1980s, British archaeoastronomers were striving to bridge the interpretative gulf between the "megalithic observatories" of Alexander Thom and an archaeological mainstream that, generally speaking, was hostile to any mention of astronomy in relation to the megalithic monuments of Neolithic and Early Bronze Age Britain. The Scottish recumbent stone circles (RSCs) came to represent an example where sounder methodology could overcome many of the data selection issues that had beset earlier studies and, with due restraint, produce credible interpretations. Systematic studies of their orientations consistently concluded that the RSCs had a strong lunar connection, and it was widely envisaged that they were the setting for ceremonies associated with the appearance of the moon over the recumbent stone. Other evidence such as the presence of white quartz and the spatial distribution of cupmarks appeared to back up this conclusion. New archaeological investigations since 1999 have challenged and modified these conclusions, confirming in particular that the circles were built to enclose cairns rather than to demarcate open spaces. Yet the restricted pattern of orientations of these structures could only have been achieved by reference to the basic diurnal motions of the skies, and orientation in relation to simple observations of the midsummer moon remains the most likely reading of the alignment evidence taken as a whole. On the other hand, a consideration of the broader context, which includes the nearby Clava cairns, highlights instead the symbolic importance of the sun.

  9. Quality Circles in Law Teaching.

    Science.gov (United States)

    Orts, Eric W.

    1997-01-01

    Explains use of quality circles, a system of regular faculty meetings with students to discuss how a course is going, in law courses. Argues that quality circles give constructive criticism of teaching, let teachers counter criticisms and explain methods, help with diversity issues, offer a mechanism for criticizing students, and give students a…

  10. Quality Circles and Employee Attitudes.

    Science.gov (United States)

    Rafaeli, Anat

    1985-01-01

    Explored relationship between employees' participation in quality circle activities and perceptions of the influence they have on their job, characteristics of their jobs, and overall job satisfaction. Involvement in a quality circle was significantly related to employees' perception of influence, and some job characteristics, but not to job…

  11. Rigidity of critical circle maps

    OpenAIRE

    Guarino, Pablo; Martens, Marco; de Melo, Welington

    2015-01-01

    We prove that any two $C^4$ critical circle maps with the same irrational rotation number and the same odd criticality are conjugate to each other by a $C^1$ circle diffeomorphism. The conjugacy is $C^{1+\\alpha}$ for Lebesgue almost every rotation number.

  12. Queuing systems on a circle

    OpenAIRE

    Kroese, Dirk; Schmidt, Volker

    1993-01-01

    Consider a ring on which customers arrive according to a Poisson process. Arriving customers drop somewhere on the circle and wait there for a server who travels on the ring. Whenever this server encounters a customer, he stops and serves the customer according to an arbitrary service time distribution. After the service is completed, the server removes the client from the circle and resumes his journey. We are interested in the number and the locations of customers that are waiting for servi...

  13. Santa and the Moon

    NARCIS (Netherlands)

    Barthel, P.

    This article reflects on the use of illustrations of the Moon in images of Santa Claus, on Christmas gift-wrapping paper and in children's books, in two countries which have been important in shaping the image of Santa Claus and his predecessor Sinterklaas: the USA and the Netherlands. The

  14. Partial covering of a circle by equal circles. Part II: The case of 5 circles

    Directory of Open Access Journals (Sweden)

    Zsolt Gáspár

    2014-05-01

    Full Text Available How must n equal circles of given radius r be placed so that they cover as great a part of the area of the unit circle as possible? In this Part II of a two-part paper, a conjectured solution of this problem for n = 5 is given for r varying from the maximum packing radius to the minimum covering radius. Results are obtained by applying a mechanical model described in Part I. A generalized tensegrity structure is associated with a maximum area configuration of the 5 circles, and by using catastrophe theory, it is pointed out that the ''equilibrium paths'' have bifurcations, that is, at certain values of r, the type of the tensegrity structure and so the type of the circle configuration changes.

  15. The Discovery of Rolling Circle Amplification and Rolling Circle Transcription.

    Science.gov (United States)

    Mohsen, Michael G; Kool, Eric T

    2016-11-15

    Nucleic acid amplification is a hugely important technology for biology and medicine. While the polymerase chain reaction (PCR) has been highly useful and effective, its reliance on heating and cooling cycles places some constraints on its utility. For example, the heating step of PCR can destroy biological molecules under investigation and heat/cool cycles are not applicable in living systems. Thus, isothermal approaches to DNA and RNA amplification are under widespread study. Perhaps the simplest of these are the rolling circle approaches, including rolling circle amplification (RCA) and rolling circle transcription (RCT). In this strategy, a very small circular oligonucleotide (e.g., 25-100 nucleotides in length) acts as a template for a DNA or an RNA polymerase, producing long repeating product strands that serve as amplified copies of the circle sequence. Here we describe the early developments and studies involving circular oligonucleotides that ultimately led to the burgeoning rolling circle technologies currently under development. This Account starts with our studies on the design of circular oligonucleotides as novel DNA- and RNA-binding motifs. We describe how we developed chemical and biochemical strategies for synthesis of well-defined circular oligonucleotides having defined sequence and open (unpaired) structure, and we outline the unusual ways in which circular DNAs can interact with other nucleic acids. We proceed next to the discovery of DNA and RNA polymerase activity on these very small cyclic DNAs. DNA polymerase "rolling circle" activities were discovered concurrently in our laboratory and that of Andrew Fire. We describe the surprising efficiency of this process even on shockingly small circular DNAs, producing repeating DNAs thousands of nucleotides in length. RNA polymerase activity on circular oligonucleotides was first documented in our group in 1995; especially surprising in this case was the finding that the process occurs efficiently

  16. Moving in Social Circles – Social Circle Membership and Performance Implications

    OpenAIRE

    Verbeke, Willem; Wuyts, Stefan

    2006-01-01

    textabstractWe investigate social circles in intra-firm settings. First, we argue that social circles are inhabited by individuals whose attitudes display fit with the objectives of the social circle rather than more self-centered instrumentalism or calculation. For a test of this hypothesis, we distinguish between friendship circles and strategy-influence circles. We find that friendship circle membership is positively associated with attitudes that display empathic concern but negatively wi...

  17. Locating a minisum circle in the plane

    DEFF Research Database (Denmark)

    Brimberg, Jack; Juel, Henrik; Schöbel, Anita

    2009-01-01

    We consider the problem of locating a circle with respect to existing facilities in the plane such that the sum of weighted distances between the circle and the facilities is minimized, i.e., we approximate a set of given points by a circle regarding the sum of weighted distances. If the radius...... of the circle is a variable we show that there always exists an optimal circle passing through two of the existing facilities. For the case of a fixed radius we provide characterizations of optimal circles in special cases. Solution procedures are suggested....

  18. On the Circle of Apollonius

    Science.gov (United States)

    Ayoub, Ayoub B.

    2006-01-01

    The circle discussed in this paper is named after "The Great Geometer of Antiquity", that is Apollonius of Perga (ca. 262-190 BCE). Among his many contributions to geometry is a book with the title "Plane Loci." This book included, among others, a problem about the locus of a point moving in a plane such that the ratio of its distances from two…

  19. The Circle Approach to Trigonometry

    Science.gov (United States)

    Moore, Kevin c.; LaForest, Kevin R.

    2014-01-01

    How do students think about an angle measure of ninety degrees? How do they think about ratios and values on the unit circle? How might angle measure be used to connect right-triangle trigonometry and circular functions? And why might asking these questions be important when introducing trigonometric functions to students? When teaching…

  20. Digital Storytelling: Reinventing Literature Circles

    Science.gov (United States)

    Tobin, Maryann Tatum

    2012-01-01

    New literacies in reading research demand the study of comprehension skills using multiple modalities through a more complex, multi-platform view of reading. Taking into account the robust roll of technology in our daily lives, this article presents an update to the traditional literature circle lesson to include digital storytelling and…

  1. On a Family of Circles

    Science.gov (United States)

    Feeman, Timothy G.

    2011-01-01

    We generalize a standard example from precalculus and calculus texts to give a simple description in polar coordinates of any circle that passes through the origin. We discuss an occurrence of this formula in the context of medical imaging. (Contains 1 figure.)

  2. Queuing systems on a circle

    NARCIS (Netherlands)

    Kroese, Dirk; Schmidt, Volker

    1993-01-01

    Consider a ring on which customers arrive according to a Poisson process. Arriving customers drop somewhere on the circle and wait there for a server who travels on the ring. Whenever this server encounters a customer, he stops and serves the customer according to an arbitrary service time

  3. Social Circles: A 3D User Interface for Facebook

    Science.gov (United States)

    Rodrigues, Diego; Oakley, Ian

    Online social network services are increasingly popular web applications which display large amounts of rich multimedia content: contacts, status updates, photos and event information. Arguing that this quantity of information overwhelms conventional user interfaces, this paper presents Social Circles, a rich interactive visualization designed to support real world users of social network services in everyday tasks such as keeping up with friends and organizing their network. It achieves this by using 3D UIs, fluid animations and a spatial metaphor to enable direct manipulation of a social network.

  4. Are Quality Circles Right for Your Company?

    Science.gov (United States)

    Ambler, Aldonna R.; Overholt, Miles H.

    1982-01-01

    The concept of quality circles is discussed. The authors explore company compatibility with Japanese management philosophy, a compatibility test, planning for the change to quality circles, need for a flexible design, and setting worthwhile goals. (CT)

  5. Combining Quality Control Circles and Work Simplification.

    Science.gov (United States)

    Rowland, Alan D.

    1984-01-01

    Discusses the benefits of combining a quality circles program with a work simplification program. Points out that both require participative management and that their combination can improve the effectiveness of quality circles. (JOW)

  6. Quality circles: Organizational adaptations, improvements and results

    Science.gov (United States)

    Tortorich, R.

    1985-01-01

    The effective application in industry and government of quality circles work was demonstrated. The results achieved in quality and productivity improvements and cost savings are impressive. The circle process should be institutionalized within industry and government. The stages of circle program growth, innovations that help achieve circle process institutionalization, and the result achieved at Martin Marietta's Michoud Division and within the National Aeronautics and Space Administration (NASA) are addressed.

  7. Improving Your School through Quality Circles.

    Science.gov (United States)

    Dunne, Thomas O'Neill; Maurer, Rick

    1982-01-01

    Asserts that the quality circle management technique is an exciting and challenging way to improve staff satisfaction and the quality of service. Defines the quality circle concept, outlines steps school administrators should take to establish quality circles, and warns of possible pitfalls. (Author/PGD)

  8. Perceptual Differences in Attitudes on Quality Circles.

    Science.gov (United States)

    Holcomb, Lynn; Berger, Leonard

    1986-01-01

    A study was conducted to determine any perceptual differences toward quality circles in a chemical plant. It also tried to determine if any perceptual differences that might be found could be related to attitudes toward the circles themselves or the attitudes toward circle members. Length of service was also a factor. (CT)

  9. Yarning Circles in the Literacy Classroom

    Science.gov (United States)

    Mills, Kathy A.; Sunderland, Naomi; Davis-Warra, John

    2014-01-01

    This article explains how the speaking and listening practice of yarning circles can be used in the literacy classroom. The article opens with an account of a live enactment of yarning circles with elementary students in a mainstream classroom in Australia. It explains the purpose and origin of yarning circles in Indigenous communities, and…

  10. A Sufficient Condition for the Circle of the 6 Points to Become Euler’s Circle

    OpenAIRE

    Patrascu, Ion; Smarandache, Florentin

    2016-01-01

    In this article, we prove the theorem relative to the circle of the 6 points and, requiring on this circle to have three other remarkable triangle’s points, we obtain the circle of 9 points (the Euler’s Circle).

  11. Nanogrid rolling circle DNA sequencing

    Energy Technology Data Exchange (ETDEWEB)

    Church, George M.; Porreca, Gregory J.; Shendure, Jay; Rosenbaum, Abraham Meir

    2017-04-18

    The present invention relates to methods for sequencing a polynucleotide immobilized on an array having a plurality of specific regions each having a defined diameter size, including synthesizing a concatemer of a polynucleotide by rolling circle amplification, wherein the concatemer has a cross-sectional diameter greater than the diameter of a specific region, immobilizing the concatemer to the specific region to make an immobilized concatemer, and sequencing the immobilized concatemer.

  12. Circle communication: an old form of communication useful for 21st century leadership.

    Science.gov (United States)

    Michaels, Cathleen L

    2002-01-01

    Circle communication is a form of group exchange that builds a network of relationships, a sense of community. Through practices of active listening, intentional speaking, and conscious self-monitoring, circle communication emphasizes individual contribution while building consensus to fulfill the purpose of the group. In this regard, circle communication supports a shared leadership in which all individual and unique perspectives are engaged to create the common ground for action. Circle communication emerges from a shared humanity, which can balance the "division of labor" and people only being known by their specific organizational roles. Both are needed to sustain an organization. By nurturing the human side, regardless of role and function, circle communication intersects with diversity or the uniqueness of each individual, storytelling, coaching, guiding, and mentoring, as well as discovering and responding to conflict.

  13. On a conjecture concerning helly circle graphs

    Directory of Open Access Journals (Sweden)

    Durán Guillermo

    2003-01-01

    Full Text Available We say that G is an e-circle graph if there is a bijection between its vertices and straight lines on the cartesian plane such that two vertices are adjacent in G if and only if the corresponding lines intersect inside the circle of radius one. This definition suggests a method for deciding whether a given graph G is an e-circle graph, by constructing a convenient system S of equations and inequations which represents the structure of G, in such a way that G is an e-circle graph if and only if S has a solution. In fact, e-circle graphs are exactly the circle graphs (intersection graphs of chords in a circle, and thus this method provides an analytic way for recognizing circle graphs. A graph G is a Helly circle graph if G is a circle graph and there exists a model of G by chords such that every three pairwise intersecting chords intersect at the same point. A conjecture by Durán (2000 states that G is a Helly circle graph if and only if G is a circle graph and contains no induced diamonds (a diamond is a graph formed by four vertices and five edges. Many unsuccessful efforts - mainly based on combinatorial and geometrical approaches - have been done in order to validate this conjecture. In this work, we utilize the ideas behind the definition of e-circle graphs and restate this conjecture in terms of an equivalence between two systems of equations and inequations, providing a new, analytic tool to deal with it.

  14. Circle-valued Morse theory

    CERN Document Server

    Pajitnov, Andrei V

    2006-01-01

    In 1927 M. Morse discovered that the number of critical points of a smooth function on a manifold is closely related to the topology of the manifold. This became a starting point of the Morse theory which is now one of the basic parts of differential topology. It is a large and actively developing domain of differential topology, with applications and connections to many geometrical problems. The aim of the present book is to give a systematic treatment of the geometric foundations of a subfield of that topic, the circle-valued Morse functions, a subfield of Morse theory.

  15. Creating collaborative advantage through students' quality circles

    OpenAIRE

    Ennals, Richard; KOKSAL, Hayal

    2011-01-01

    Turkey has played a pioneering role in the Quality movement in both industry and education, providing sound foundations for current development processes. Students’ Quality Circles, or Imece Circles, have provided a focus in Turkey and internationally. In the context of Knowledge Society and Knowledge Economy, new forms of work organisation offer collaborative advantage.\\ud \\ud Keywords: collaboration, empowerment, Imece, Quality, social capital, Students’ Quality Circles

  16. Fairy circle landscapes under the sea

    KAUST Repository

    Ruiz-Reynés, Daniel

    2017-08-03

    Short-scale interactions yield large-scale vegetation patterns that, in turn, shape ecosystem function across landscapes. Fairy circles, which are circular patches bare of vegetation within otherwise continuous landscapes, are characteristic features of semiarid grasslands. We report the occurrence of submarine fairy circle seascapes in seagrass meadows and propose a simple model that reproduces the diversity of seascapes observed in these ecosystems as emerging from plant interactions within the meadow. These seascapes include two extreme cases, a continuous meadow and a bare landscape, along with intermediate states that range from the occurrence of persistent but isolated fairy circles, or solitons, to seascapes with multiple fairy circles, banded vegetation, and

  17. Santa and the moon

    CERN Document Server

    Barthel, Peter

    2011-01-01

    Happy end-of-the-year evening and night events provide good opportunities to explain the phases of the moon. The need for such moon phase education is once again demonstrated, through an investigation of illustrations on Santa Claus and Christmas gift wrap and in children's books, in two countries which have been important in shaping the image of Santa Claus and his predecessor Sinterklaas: The Netherlands and the USA. The moon on Halloween illustrations is also considered. The lack of knowledge concerning the physical origin of the moon phases, or lack of interest in understanding, is found to be widespread in The Netherlands but is also clearly present in the USA, and is quite possibly global. Definitely incomplete, but surely representative lists compiling both scientifically correct and scientifically incorrect gift wrap and children's books are also presented.

  18. Moving in Social Circles – Social Circle Membership and Performance Implications

    NARCIS (Netherlands)

    W.J.M.I. Verbeke (Willem); S.H.K. Wuyts (Stefan)

    2006-01-01

    textabstractWe investigate social circles in intra-firm settings. First, we argue that social circles are inhabited by individuals whose attitudes display fit with the objectives of the social circle rather than more self-centered instrumentalism or calculation. For a test of this hypothesis, we

  19. Beyond Quality Circles: Self-Managing Teams.

    Science.gov (United States)

    Sims, Henry P., Jr.; Dean, James W., Jr.

    1985-01-01

    This article reviews the quality circle concept, shows why its characteristics appeal to American executives, and examines some of its limitations. It looks at self-managing teams and discusses the reasons that adoptions have been relatively few. It then shows what organizational conditions are necessary for quality circles to evolve into teams.…

  20. Japanese Quality Circles in the Classroom.

    Science.gov (United States)

    Lenmark-Ellis, Barbara

    1988-01-01

    Describes the use of quality circles in an Oregon State University class, "Survey of the Media," to improve group dynamics and modify problem behavior. Explains how the quality circles are set up and how team ratings are used to grade student work. (DMM)

  1. Quality Circle Applications to Residence Life.

    Science.gov (United States)

    Keller, Robert J.

    1987-01-01

    Discusses quality circle programs in educational systems and describes a successful application of quality circles within a residential life program at Pittsburg State University in Pittsburg, Kansas. Presents findings from program evaluation which focused on quality of committee products and which illustrated success of quality circle…

  2. Education for "Quality Circles" in Japanese Schools.

    Science.gov (United States)

    Torrance, E. Paul

    1982-01-01

    The Quality Circle is a simple management technique in which workers in the same production area meet to solve company problems. The Quality Circle has been applied to elementary and secondary schools in Japan to help students to develop creative problem solving skills and independent study skills. Recommendations are given for implementing…

  3. Drum Circles and the National Standards

    Science.gov (United States)

    Fidyk, Steve

    2009-01-01

    The beauty of hand drums is that a child of nearly any age can grab one and get a sound. So how can classroom teachers incorporate this enjoyable activity into something that's actually educational? For young students especially, a drum circle can be liberating. Children can be given various responsibilities--as participants, circle organizers,…

  4. Developing Soft Skills Using "Literature Circles"

    Science.gov (United States)

    Azmi, Mohd Nazri Bin Latiff

    2013-01-01

    This study investigates the impact of the implementation of "Literature Circles" in an Active Learning classroom in relations to developing soft skills among university students. The use of Literature Circles is a well-known strategy in teaching the students to be more creative, independent, and think out of the box. A group of…

  5. Unit Circles and Inverse Trigonometric Functions

    Science.gov (United States)

    Barrera, Azael

    2014-01-01

    Historical accounts of trigonometry refer to the works of many Indian and Arab astronomers on the origin of the trigonometric functions as we know them now, in particular Abu al-Wafa (ca. 980 CE), who determined and named all known trigonometric functions from segments constructed on a regular circle and later on a unit circle (Moussa 2011;…

  6. Rigidity of smooth critical circle maps

    OpenAIRE

    Guarino, Pablo; de Melo, Welington

    2013-01-01

    We prove that any two $C^3$ critical circle maps with the same irrational rotation number of bounded type and the same odd criticality are conjugate to each other by a $C^{1+\\alpha}$ circle diffeomorphism, for some universal $\\alpha>0$.

  7. Locating a circle on a sphere

    DEFF Research Database (Denmark)

    Brimberg, Jack; Juel, Henrik; Schöbel, Anita

    2003-01-01

    We consider the problem of locating a spherical circle with respect to existing facilities on a sphere, such that the sum of weighted distances between the circle and the facilities is minimized, or such that the maximum weighted distance is minimized. The problem properties are analyzed, and we ...

  8. Locating a circle on a sphere

    DEFF Research Database (Denmark)

    Brimberg, Jack; Juel, Henrik; Schöbel, Anita

    2007-01-01

    We consider the problem of locating a spherical circle with respect to existing facilities on a sphere, such that the sum of distances between the circle and the facilities is minimized or such that the maximum distance is minimized. The problem properties are analyzed, and we give solution proce...

  9. The circle equation over finite fields

    DEFF Research Database (Denmark)

    Aabrandt, Andreas; Hansen, Vagn Lundsgaard

    2017-01-01

    Interesting patterns in the geometry of a plane algebraic curve C can be observed when the defining polynomial equation is solved over the family of finite fields. In this paper, we examine the case of C the classical unit circle defined by the circle equation x2 + y2 = 1. As a main result, we...

  10. Análisis de las fuentes de información sobre medicamentos de carácter personal en la red de farmacias del municipio Santa Clara Analysis of personal sources of information on drugs present in the network of pharmacies of Santa Clara municipality

    Directory of Open Access Journals (Sweden)

    Manuel Osvaldo Machado Rivero

    2008-12-01

    Full Text Available Se realizó un análisis de las fuentes de información sobre medicamentos no documentales (personales, disponibles en la red de farmacias del municipio Santa Clara. Este estudio tuvo como objetivo la evaluación de las fuentes de información no documentales de carácter personal con que cuenta dicha red. Se incluyeron en esta investigación 26 unidades de farmacias comunitarias. Se diseñó un modelo de recogida de datos para recopilar información sobre el tipo de fuente sujeto de análisis en el presente trabajo. Se encuestaron 7 licenciados en Ciencias Farmacéuticas, profesionales responsables del servicio de información en las distintas unidades de la red de farmacias comunitarias. Paralelamente se estudió la posible función que podían tener los técnicos de Farmacia en dicho servicio, para lo cual se encuestaron a 47 personas que se desempeñan en esa profesión. Los resultados permitieron determinar que existen dificultades con la accesibilidad de la población a estas fuentes; los profesionales de nivel superior no ejercen de manera diaria su función como fuentes de información; se debe profundizar en la superación de técnicos y licenciados, así como en la participación en eventos y la publicación de artículos. No existieron diferencias significativas entre la cantidad de encuestados que refieren emplear la forma personal, responder a consultas telefónicas, o aquellos que combinan ambas formas cotidianamente para brindar información sobre medicamentos.The objective of this study was the evaluation of non-documentary (personal sources of information available in the pharmacy network of Santa Clara municipality. To this end, twenty six community-based pharmacies were included. A data collection model to gather information on the type of source under analysis in this paper was designed. Seven Bachelors of Pharmaceutical Sciences, who are the professionals in charge of the information service in the network of community

  11. A comprehensive study of the anatomical variations of the circle of willis in adult human brains.

    Science.gov (United States)

    Iqbal, S

    2013-11-01

    Cerebrovascular diseases such as stroke, aneurysms and arterio-venous malformations are very much prevalent in our country. Circle of Willis, as an anastomotic polygon at the base of the brain forms an important collateral network to maintain adequate cerebral perfusion. Changes in the normal morphology of the circle may condition the appearance and severity of symptoms of cerebrovascular disorders, such as aneurysms, infarctions and other vascular anomalies. A possible link between abnormalities of the circle of Willis and the mentally ill patients has been observed. The aim of the present study is to have an intimate knowledge of the variations in the cerebral arterial circle and to clarify the clinical importance of these variations in certain forms of cerebrovascular diseases. So an attempt was made to analyse the anatomical variations of the circle in a random population. The work was based on fifty adult brains from persons died of diverse causes. The materials were obtained during routine autopsy studies. The base of the brain including the brain stem with intact arterial circle was preserved in 10% formalin for 10 days. The circle of Willis and its major branches were carefully dissected under water using a magnifying lens. The variations were recorded and photographed. Majority of the circles (52%) showed anomalies. Hypoplasia was the most frequent anomaly and was found in 24% of the brains. Accessory vessels in the form of duplications/triplications of anterior communicating artery were seen in 12% of the circles. The embryonic origin of the posterior cerebral artery from the internal carotid persisted in 10% of the circles. An incomplete circle due to the absence of one or other posterior communicating artery was found in 6% of the specimens.Variations are more frequent in posterior half of the circle. The anatomical variations of the circle of Willis were probably genetically determined, develop in early embryonic stage and persist in post natal life

  12. Darboux cyclides and webs from circles

    KAUST Repository

    Pottmann, Helmut

    2012-01-01

    Motivated by potential applications in architecture, we study Darboux cyclides. These algebraic surfaces of order ≤4 are a superset of Dupin cyclides and quadrics, and they carry up to six real families of circles. Revisiting the classical approach to these surfaces based on the spherical model of 3D Möbius geometry, we provide computational tools for the identification of circle families on a given cyclide and for the direct design of those. In particular, we show that certain triples of circle families may be arranged as so-called hexagonal webs, and we provide a complete classification of all possible hexagonal webs of circles on Darboux cyclides. © 2011 Elsevier B.V. All rights reserved.

  13. Robust Circle Detection Using Harmony Search

    Directory of Open Access Journals (Sweden)

    Jaco Fourie

    2017-01-01

    Full Text Available Automatic circle detection is an important element of many image processing algorithms. Traditionally the Hough transform has been used to find circular objects in images but more modern approaches that make use of heuristic optimisation techniques have been developed. These are often used in large complex images where the presence of noise or limited computational resources make the Hough transform impractical. Previous research on the use of the Harmony Search (HS in circle detection showed that HS is an attractive alternative to many of the modern circle detectors based on heuristic optimisers like genetic algorithms and simulated annealing. We propose improvements to this work that enables our algorithm to robustly find multiple circles in larger data sets and still work on realistic images that are heavily corrupted by noisy edges.

  14. Area of Common Overlap of Three Circles

    National Research Council Canada - National Science Library

    Fewell, M. P

    2006-01-01

    .... The results presented here have general significance in the corpus of menstruation formulae, and could be of specific use in any quantitative application of the three-circle Venn diagram such as for...

  15. Classification by causes of dark circles and appropriate evaluation method of dark circles.

    Science.gov (United States)

    Park, S R; Kim, H J; Park, H K; Kim, J Y; Kim, N S; Byun, K S; Moon, T K; Byun, J W; Moon, J H; Choi, G S

    2016-08-01

    Dark circles refer to a symptom that present darkness under the eyes. Because of improvement in the quality of life, the dark circles have been recognized as one of major cosmetic concerns. However, it is not easy to classify the dark circles because they have various causes. To select suitable instruments and detailed evaluation items, the dark circles were classified according to the causes through visual assessment, Wood's lamp test, and medical history survey for 100 subjects with dark circles. After the classification, were newly recruited for instrument conformity assessment. Through this, suitable instruments for dark circle evaluation were selected. We performed a randomized clinical trial for dark circles, a placebo-controlled double-blind study, using effective parameters of the instruments selected from the preliminary test. Dark circles of vascular type (35%) and mixed type (54%), a combination of pigmented and vascular types, were the most common. Twenty four subjects with the mixed type dark circles applied the test product (Vitamin C 3%, Vitamin A 0.1%, Vitamin E 0.5%) and placebo on randomized split-face for 8 weeks. The effective parameters (L*, a, M.I., E.I., quasi L*, quasi a* and dermal thickness) were measured during the study period. Result showed that the L* value of Chromameter(®) , Melanin index (M.I.) of Mexameter(®) and quasi L* value obtained by image analysis improved with statistical significance after applying the test product compared with the placebo product. We classified the dark circles according to the causes of the dark circles and verified the reliability of the parameter obtained by the instrument conformity assessment used in this study through the efficacy evaluation. Also based on this study, we were to suggest newly established methods which can be applied to the evaluation of efficacy of functional cosmetics for dark circles. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  16. [Sociabilities, networks and the circulation of knowledges in the creation of a "psy scope" in Argentina during the inter-war period (Santa Fe, 1919-1943)].

    Science.gov (United States)

    Allevi, José Ignacio

    2016-01-01

    This article presents the findings of a research study on the construction of a psy scientific field in Argentina during the inter-war period, with a focus on subnational spaces. After 1920, the mental hygiene movement, in its different disciplinary manifestations, became notable in the public sphere, in university education and - belatedly - in healthcare policies, in an expansion that led to the creation of an autonomous field with its own logic. I argue that the creation of this "psy field" - while it was as yet inexistent - was largely due to the strength of sociability networks that facilitated the management of resources and institutional spaces of power, making it possible for the field to become independent and established.

  17. Training for Quality--The Italian Experience of Quality Circles.

    Science.gov (United States)

    Ferrari, S.

    1986-01-01

    Examines the organization of quality circles in Italy, the training aspect of these quality circles, and advantages and limitations of quality circles. For successful circles, the author recommends a feasibility study by qualified consultants, an experimental pilot project confined to certain parts of the company, and a fully informed management.…

  18. Quality Circles: Implications for Training. Information Series No. 243.

    Science.gov (United States)

    Harshman, Carl L.

    This paper explores the background to and process of quality circles as well as the implications of circles for training. In the first section, the emergence and growth of quality circles in Japan and the United States are traced. Next, the theoretical and conceptual bases of quality circles are examined, while section 3 looks at implementation in…

  19. the conception of the circle of concerned african women theologians

    African Journals Online (AJOL)

    Circle members on the beginnings of the Circle have clearly indicated that the Circle was meant to be African. .... The role of Mercy Dakwaa Yamoah in establishing her children in leader- ship posi tions is also highlighted in ..... the Yale Divinity College during the student exchange visits in which Circle women participated.

  20. In the company of my sisters: sister circles as an anxiety intervention for professional African American women.

    Science.gov (United States)

    Neal-Barnett, Angela M; Stadulis, Robert; Payne, Margaret Ralston; Crosby, Lori; Mitchell, Monica; Williams, Lakisha; Williams-Costa, Crystal

    2011-03-01

    Sister circles have been used within African American communities to raise awareness about physical health. The possibility exists that sister circles could be used to educate and teach women strategies about managing anxiety and panic. In this paper we examine professional Black women's conceptualization of panic attacks and other related anxiety issues. Then, we explore the feasibility of sister circles as a psycho-educational anxiety intervention for African American professional women. Four focus groups (n=37) were conducted. Focus group interviews were transcribed and were coded into three categories: (a) a major theme; (b) a minor theme; or (c) an off-topic comment. Specifically, we generate information regarding the key content and research components of a sister circle for African American female professionals. Focus group members saw a distinct difference between anxiety and panic. The number of African American women who experienced was seen as low. Women felt sister circles were a nice vehicle for helping African American women manage their anxiety and panic. Confidentially was a key component. Sister circles for anxiety and panic were seen as a natural outgrowth of African American women's professional networks. Limited data were collected on participant's anxiety levels. Overall, sister circles were seen as feasible interventions for African American professional women. The data from the focus groups were used to enhance the development of a sister circle intervention for anxious professional African American women. Copyright © 2010 Elsevier B.V. All rights reserved.

  1. Magnetic Resonance Angiographic Study of Anatomic Variations of the Circle of Willis in a Population in Tehran.

    Science.gov (United States)

    Jalali Kondori, Bahman; Azemati, Fateme; Dadseresht, Sonia

    2017-04-01

    The circle of Willis, an anastomotic polygon at the base of the brain, forms an important collateral network to maintain cerebral blood perfusion. The aim of this study was to investigate different anatomic variations of the circle of Willis and their prevalence. This cross-sectional study was conducted on 525 healthy participants including 205 men and 320 women. The mean age of the patients was 51.5 years. Three-dimensional time-of-flight magnetic resonance angiography (3D-TOF MRA) technique was used. Vascular variations in the anterior and posterior parts of the circle were evaluated. The findings show that the complete circle of Willis was visible in a small number of patients. The circle of Willis had a complete vascular structure in 20.9% of the patients. The anterior part of the circle of Willis had a complete structure in 80.95% of the cases, while the posterior part had a complete structure in 20.95% of the cases. We observed wide variations in the circle of Willis configuration in our study. Similar to other studies, most variations are related to the posterior part of the circle of Willis. Absence of bilateral posterior communicating artery variation is more common than other types of variations in this population.

  2. Attributions of Quality Circles' Failure: Perceptions among Top-Management, Supporting Staff, and Quality Circle Members.

    Science.gov (United States)

    Tang, Thomas Li-Ping; Butler, Edie Aguilar

    Quality circles, a management practice that involves groups of workers from the same work area voluntarily meeting on a regular basis to identify, analyze, and solve various work-related problems, have been used in Japan for over 40 years. In the United States, quality circles have been tried in many organizations during the past 2 decades and…

  3. Expanding-Circle Students Learning "Standard English" in the Outer-Circle Asia

    Science.gov (United States)

    Kobayashi, Yoko

    2011-01-01

    Drawing upon Kachru's concentric circles of English, the present study explores whether middle-class Japanese students who chose to study English solo at private language schools in Singapore diverge from many others who (wish to) study inner-circle English. The study is stimulated by the repeated interdisciplinary findings that, in spite of the…

  4. ciudad de Santa Marta

    Directory of Open Access Journals (Sweden)

    Javier Alfredo Ferreira Ospino

    2008-01-01

    Full Text Available Esta investigación evalúa los resultados de un programa de Formación en Derechos con madres comunitarias para la solución de conflictos en la Comuna Ocho de la ciudad de Santa Marta. El programa buscó el desarrollo de la capacidad de análisis y discernimiento para la toma de decisiones, que les permitan participar activamente en la solución de problemas de la comunidad, tendientes a mejorar las condiciones de vida de los miembros de la ésta. El proyecto se enmarca en un diseño de investigación cuasiexperimental con grupo control y medida pre y post, de forma que puedan medirse no sólo los resultados del programa, sino su efectividad para la resolución de conflictos en la comunidad. Se utilizó el cuestionario adaptado a la Teoría de Rahim y otros autores de la teoría del conflicto con el fin de determinar la manera como se resuelven los conflictos en la comunidad. Esta investigación se centró en demostrar objetivamente la efectividad del programa y las diferencias deliberativas y discursivas más relevantes entre los sujetos que recibieron formación en derechos.

  5. ENTREPRENEURSHIP EDUCATION AND THE ECONOMY VICIOUS CIRCLES

    Directory of Open Access Journals (Sweden)

    MEDAR LUCIAN ION

    2015-06-01

    Full Text Available Education for sustainable development, involves training honest, active, social and creative persons for ensuring the link between environment, society, economy and politics. Trained entrepreneurs in sustainable development, are the engine system which can bring an economic prosperity. Lack of entrepreneurial education in the last 25 years has led accentuated conditions to avoiding economic development in all reference fields where added value can be achieved. Running away from excessive taxation led to the establishment of vicious circles in the economy. Vicious circles of the economy can be found in saving, tax policy, productive investment and the informal economy. Through this study will present the importance of entrepreneurship education in the real economy and some specifications to exit entrepreneurs from vicious circles of the economy.

  6. Packing circles and spheres on surfaces

    KAUST Repository

    Schiftner, Alexander

    2009-01-01

    Inspired by freeform designs in architecture which involve circles and spheres, we introduce a new kind of triangle mesh whose faces\\' incircles form a packing. As it turns out, such meshes have a rich geometry and allow us to cover surfaces with circle patterns, sphere packings, approximate circle packings, hexagonal meshes which carry a torsion-free support structure, hybrid tri-hex meshes, and others. We show how triangle meshes can be optimized so as to have the incircle packing property. We explain their relation to conformal geometry and implications on solvability of optimization. The examples we give confirm that this kind of meshes is a rich source of geometric structures relevant to architectural geometry. © 2009 ACM.

  7. Packing circles and spheres on surfaces

    KAUST Repository

    Schiftner, Alexander

    2009-12-01

    Inspired by freeform designs in architecture which involve circles and spheres, we introduce a new kind of triangle mesh whose faces\\' incircles form a packing. As it turns out, such meshes have a rich geometry and allow us to cover surfaces with circle patterns, sphere packings, approximate circle packings, hexagonal meshes which carry a torsion-free support structure, hybrid tri-hex meshes, and others. We show how triangle meshes can be optimized so as to have the incircle packing property. We explain their relation to conformal geometry and implications on solvability of optimization. The examples we give confirm that this kind of meshes is a rich source of geometric structures relevant to architectural geometry.

  8. Students’ Scientific Circle of Obstetrics and Gynaecology

    Directory of Open Access Journals (Sweden)

    Ivan Polishchuk

    2017-06-01

    Full Text Available The students’ scientific circle is the kind of teaching obstetrics and gynaecology in a higher medical institution. The circle is an elective form of learning that allows the students to get deeper knowledge of a subject and to perfect themselves in the issues of diagnostics in obstetrics and gynaecology as well as to acquaint themselves with basic medical techniques. It helps identify students who are capable of scientific research and allows the students to improve their ability to analytical perception of professional information, the ability to present it to the audience, ask and answer the questions publicly. The article presents the results of practical and research activities of obstetric and gynaecologic section of the students’ scientific circle of Ivano-Frankivsk National Medical University.

  9. Study Circles and Socio-cultural Animation

    Directory of Open Access Journals (Sweden)

    Vilma Malečkar

    2001-12-01

    Full Text Available Informal learning and participating in study circles is a way of applying the ideas of socio-cultural animation. It is based on the assumption that within a society there are mechanisms that institutions don't comprise and therefore don't fulfil various, often urgent needs deriving from everyday life and the community. What is going on here is identifying and solving burning problems; some of them have already become an integral part of the way of living in a community. Study circles as an informal phenomenon in Slovenia create new possibilities of social activities based on common learning and participating in a community.

  10. Study Circles and Socio-cultural Animation

    OpenAIRE

    Vilma Malečkar

    2001-01-01

    Informal learning and participating in study circles is a way of applying the ideas of socio-cultural animation. It is based on the assumption that within a society there are mechanisms that institutions don't comprise and therefore don't fulfil various, often urgent needs deriving from everyday life and the community. What is going on here is identifying and solving burning problems; some of them have already become an integral part of the way of living in a community. Study circles as an in...

  11. Dark circles: etiology and management options.

    Science.gov (United States)

    Friedmann, Daniel P; Goldman, Mitchel P

    2015-01-01

    Given their multifactorial nature and the fact that individual patients may have more than a single underlying cause, cosmetic practitioners should be well versed in a number of potential treatment options encompassing all facets of under-eye dark circles. New therapeutic options are also forthcoming. Longer-lasting HA fillers, wavelength tunable laser devices, and topicals speeding up healing and enhancing results after fractionated laser therapy will all serve to make the future of dark circle treatment unabatedly bright. Copyright © 2015 Elsevier Inc. All rights reserved.

  12. Peer Evaluation of Master Programs: Closing the Quality Circle of the CDIO Approach?

    DEFF Research Database (Denmark)

    Hussmann, Peter Munkebo; Bisi, Anita; Malmqvist, Johan

    2012-01-01

    peer evaluations of educational programs to enable their further development and close the quality circle. In addition, the project will contribute to the consolidation of the N5T alliance by facilitating contacts between faculty members and providing them with an in-depth knowledge of the study...... programs within their field at another N5T institution. The article describes the quality enhancement tool in detail, its contribution to the development of the involved programs, and how international peer evaluation can contribute to closing the quality circle. Finally, it assesses the value...... of the approach to contribute to the creation of long-term relationships in educational networks....

  13. Partial covering of a circle by equal circles. Part I: The mechanical models

    Directory of Open Access Journals (Sweden)

    Zsolt Gáspár

    2014-05-01

    Full Text Available How must n equal circles of given radius be placed so that they cover as great a part of the area of the unit circle as possible? To analyse this mathematical problem, mechanical models are introduced. A generalized tensegrity structure is associated with a maximum area configuration of the n circles, whose equilibrium configuration is determined numerically with the method of dynamic relaxation, and the stability of equilibrium is investigated by means of the stiffness matrix of the tensegrity structure. In this Part I, the principles of the models are presented, while an application will be shown in the forthcoming Part II.

  14. Quality Circles in Education. Final Report.

    Science.gov (United States)

    Moretz, H. Lynn

    Following an 11-month period of study, planning, and pilot testing, a project was undertaken at Central Piedmont Community College (CPCC) to implement quality circles, i.e., small groups of employees doing similar work who voluntarily meet on a regular basis to set goals, identify and analyze problems, find solutions, and cooperate with management…

  15. Everything within a Circle Is One Thing

    Centers for Disease Control (CDC) Podcasts

    2017-12-19

    Byron Breedlove, EID managing editor, discuses and reads his December 2017 cover essay, Everything within a Circle is One Thing.  Created: 12/19/2017 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 12/19/2017.

  16. Syllable Circles for Pronunciation Learning and Teaching

    Science.gov (United States)

    Whipple, John; Cullen, Charlie; Gardiner, Keith; Savage, Tim

    2015-01-01

    Syllable Circles are interactive visualizations representing prominence as a feature in short phrases or multi-syllable words. They were designed for computer-aided pronunciation teaching. This study explores whether and how interactive visualizations can affect language learners' awareness of prominence, or stress, in English pronunciation. The…

  17. Information flow through the disaster circle

    DEFF Research Database (Denmark)

    Egedorf, Maren Marie; Villanueva Holm-Nielsen, Pablo

    The traditional view of the disaster circle is phase based. Disaster and development professionals recognize that the actions carried out in the various phases of the disaster management cycle are overlapping and build upon each other, having resilience as the overall goal. However information do...

  18. Waring's Problem and the Circle Method

    Indian Academy of Sciences (India)

    ematicalOlympiad. Programme at different levels since 1989. His research interests lie in number theory; his other interests include classical music and mountaineering. the problems they worked on. Their proof of a slightly. Keywords weaker form of Ramanujan's original formula was pub-. Waring's problem, circle method,.

  19. Modelling the self-organization and collapse of complex networks

    Indian Academy of Sciences (India)

    Modelling the self-organization and collapse of complex networks. Sanjay Jain Department of Physics and Astrophysics, University of Delhi Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore Santa Fe Institute, Santa Fe, New Mexico.

  20. Another lesson from Santa Barbara.

    Science.gov (United States)

    Holmquest, Donald L

    2007-01-01

    In this commentary, Don Holmquest, speaking from the perspective of a statewide regional health information organization (RHIO), responds to papers by Robert Miller and Bradley Miller and by David Brailer on lessons learned from the Santa Barbara County Care Data Exchange project and its subsequent demise. He posits that one of the critical lessons learned through the Santa Barbara experience is the need for a careful analysis of who benefits from health information exchange as part of creating a sustainable business model for health information exchange projects.

  1. The Key to Effective Quality Circles. Research Report.

    Science.gov (United States)

    Honeycutt, Alan

    1989-01-01

    A survey of 83 quality circle members determined that there was no single variable that consistently emerged as the most important contributor to the effectiveness of quality circles. Member training did appear to be stronger than the other variables. (JOW)

  2. How to Avoid Quality Circle Failure in Your Company.

    Science.gov (United States)

    Ingle, Sud

    1982-01-01

    Describes the successful quality circle program at Mercury Marine, a leading outboard motor manufacturer. Discusses reasons for quality circle failure in American industries and suggests ways to achieve success. (JOW)

  3. Locating a circle on the plane using the minimax criterion

    DEFF Research Database (Denmark)

    Brimberg, Jack; Juel, Henrik; Schoebel, Anita

    2006-01-01

    We consider the problem of locating a circle with respect to existing facilities on the plane, such that the largest weighted distance between the circle and the facilities is minimized. The problem properties are analyzed, and a solution procedure proposed.......We consider the problem of locating a circle with respect to existing facilities on the plane, such that the largest weighted distance between the circle and the facilities is minimized. The problem properties are analyzed, and a solution procedure proposed....

  4. Quality Circles in Higher Education: A Survey of Mismanagement.

    Science.gov (United States)

    Simmons, John; Kahn, Susan

    1990-01-01

    The article examines reasons for the decline in use of quality circles in higher education. A 1988 survey of eight universities and colleges using circles in 1986 found that because quality circle principles were violated, similar problems (such as inadequate training, problematic group membership, and exclusion of supervisors) were encountered at…

  5. Quality/Performance Circles Three Years after Implementation.

    Science.gov (United States)

    Ladwig, Dennis J.

    An overview is provided of the development of quality/performance circles at Lakeshore Technical Institute (LTI), Wisconsin, and of the projects undertaken through the quality/performance circle program during its 3-year history. First, background information is provided on the use of quality circles in Japan and the United States, including…

  6. Quality Circles and Organizational Change in Educational Administration.

    Science.gov (United States)

    Lilly, Edward R.

    Quality circles are groups of people performing similar work that meet regularly to improve their work settings. Since the quality circle is a means for organizational change, it is helpful to place the concept within the literature of organizational change in the field of educational administration. With the use of quality circles, change occurs…

  7. Mismanagement and Quality Circles: How Middle Managers Influence Direct Participation.

    Science.gov (United States)

    Brennan, Maire

    1991-01-01

    Case studies of five Scottish companies found that four of their quality circles programs had ceased. Essential to the success of quality circles were changes in the systems of reward, communication, and decision making and the cooperation and support of middle managers, who may see quality circles as a threat and who control the resources they…

  8. The Relationship between Quality Circles and Teacher Satisfaction.

    Science.gov (United States)

    Sherman, Ross

    1990-01-01

    The relationship of teacher participation in Quality Circles to teacher satisfaction was examined for 64 elementary school teachers participating in 9 Quality Circle decision-making groups. Participation in the Quality Circles did not meet subjects' needs for achievement, recognition, or growth; and it did not increase job satisfaction. (SLD)

  9. Effective Teaching Circles: Support for Math Anxious Students

    Science.gov (United States)

    Powell, Mary Ann; Harrington, Judy

    2011-01-01

    Teaching circles are an innovative mechanism to support faculty and improve student learning. This article describes the use of instructor teaching circles to support math-anxious students at a mid-sized urban university, including the purposes, formation, and sometimes surprising outcomes associated with using this method. Teaching circles for…

  10. Forming Circle Formations of Anonymous Mobile Agents With Order Preservation

    NARCIS (Netherlands)

    Wang, Chen; Xie, Guangming; Cao, Ming

    2013-01-01

    We propose distributed control laws for a group of anonymous mobile agents to form desired circle formations when the agents move in the one-dimensional space of a circle. The agents are modeled by kinematic points. They share the common knowledge of the orientation of the circle, but are oblivious

  11. Locating a general minisum 'circle' on a plane

    DEFF Research Database (Denmark)

    Brimberg, Jack; Juel, Henrik; Körner, Mark-Christoph

    2011-01-01

    We approximate a set of given points in the plane by the boundary of a convex and symmetric set which is the unit circle of some norm. This generalizes previous work on the subject which considers Euclidean circles only. More precisely, we examine the problem of locating and scaling the unit circle...

  12. Yoctomole electrochemical genosensing of Ebola virus cDNA by rolling circle and circle to circle amplification.

    Science.gov (United States)

    Carinelli, S; Kühnemund, M; Nilsson, M; Pividori, M I

    2017-07-15

    This work addresses the design of an Ebola diagnostic test involving a simple, rapid, specific and highly sensitive procedure based on isothermal amplification on magnetic particles with electrochemical readout. Ebola padlock probes were designed to detect a specific L-gene sequence present in the five most common Ebola species. Ebola cDNA was amplified by rolling circle amplification (RCA) on magnetic particles. Further re-amplification was performed by circle-to-circle amplification (C2CA) and the products were detected in a double-tagging approach using a biotinylated capture probe for immobilization on magnetic particles and a readout probe for electrochemical detection by square-wave voltammetry on commercial screen-printed electrodes. The electrochemical genosensor was able to detect as low as 200 ymol, corresponding to 120 cDNA molecules of L-gene Ebola virus with a limit of detection of 33 cDNA molecules. The isothermal double-amplification procedure by C2CA combined with the electrochemical readout and the magnetic actuation enables the high sensitivity, resulting in a rapid, inexpensive, robust and user-friendly sensing strategy that offers a promising approach for the primary care in low resource settings, especially in less developed countries. Copyright © 2016 Elsevier B.V. All rights reserved.

  13. Differences between Active and Inactive Quality Circles in Attendance and Performance.

    Science.gov (United States)

    Tang, Thomas Li-Pang; And Others

    1993-01-01

    Discriminant analysis of differences between 32 active and 12 inactive quality circles on member participation and circle performance showed that active circles had a lower failure rate, higher attendance, and higher net savings in circle projects. (SK)

  14. Canadian Quality Circle pilot project in osteoporosis

    Science.gov (United States)

    Ioannidis, George; Papaioannou, Alexandra; Thabane, Lehana; Gafni, Amiram; Hodsman, Anthony; Kvern, Brent; Johnstone, Dan; Plumley, Nathalie; Baldwin, Alanna; Doupe, M.; Katz, Alan; Salach, Lena; Adachi, Jonathan D.

    2007-01-01

    PROBLEM ADDRESSED Family physicians are not adequately following the 2002 Osteoporosis Canada guidelines for providing optimal care to patients with osteoporosis. OBJECTIVE OF PROGRAM The Canadian Quality Circle (CQC) pilot project was developed to assess the feasibility of the CQC project design and to gather informationfor implementing a national study of quality circles (QCs). The national study would assess whether use ofQCs could improve family physicians’ adherence to the osteoporosis guidelines. PROGRAM DESCRIPTION The pilot project enrolled 52 family physicians and involved 7 QCs. The project had 3 phases: training and baseline data collection, educational intervention and follow-up data collection, and sessions on implementing strategies for care. CONCLUSION Findings from the pilot study showed that the CQC project was well designed and well received. Use of QCs appeared to be feasible for transferring knowledge and giving physicians an opportunity to analyze work-related problems and develop solutions to them. PMID:17934033

  15. Function representation with circle inversion map systems

    Science.gov (United States)

    Boreland, Bryson; Kunze, Herb

    2017-01-01

    The fractals literature develops the now well-known concept of local iterated function systems (using affine maps) with grey-level maps (LIFSM) as an approach to function representation in terms of the associated fixed point of the so-called fractal transform. While originally explored as a method to achieve signal (and 2-D image) compression, more recent work has explored various aspects of signal and image processing using this machinery. In this paper, we develop a similar framework for function representation using circle inversion map systems. Given a circle C with centre õ and radius r, inversion with respect to C transforms the point p˜ to the point p˜', such that p˜ and p˜' lie on the same radial half-line from õ and d(õ, p˜)d(õ, p˜') = r2, where d is Euclidean distance. We demonstrate the results with an example.

  16. CHARACTERISTICS OF HYDROCARBON EXPLOITATION IN ARCTIC CIRCLE

    Directory of Open Access Journals (Sweden)

    Vanja Lež

    2013-12-01

    Full Text Available The existence of large quantities of hydrocarbons is supposed within the Arctic Circle. Assumed quantities are 25% of the total undiscovered hydrocarbon reserves on Earth, mostly natural gas. Over 500 major and minor gas accumulations within the Arctic Circle were discovered so far, but apart from Snøhvit gas field, there is no commercial exploitation of natural gas from these fields. Arctic gas projects are complicated, technically hard to accomplish, and pose a great threat to the return of investment, safety of people and equipment and for the ecosystem. Russia is a country that is closest to the realization of the Arctic gas projects that are based on the giant gas fields. The most extreme weather conditions in the seas around Greenland are the reason why this Arctic region is the least explored and furthest from the realization of any gas project (the paper is published in Croatian .

  17. Rolling circle amplification of metazoan mitochondrialgenomes

    Energy Technology Data Exchange (ETDEWEB)

    Simison, W. Brian; Lindberg, D.R.; Boore, J.L.

    2005-07-31

    Here we report the successful use of rolling circle amplification (RCA) for the amplification of complete metazoan mt genomes to make a product that is amenable to high-throughput genome sequencing techniques. The benefits of RCA over PCR are many and with further development and refinement of RCA, the sequencing of organellar genomics will require far less time and effort than current long PCR approaches.

  18. Developing Learning Analytics for TUT Circle

    OpenAIRE

    Tervakari, Anne-Maritta; Marttila, Jarno; Kailanto, Meri; Huhtamäki, Jukka; Koro, Juho; Silius, Kirsi

    2012-01-01

    Part 4: Learning Analytics in Higher Education; International audience; In this article, we introduce the concept of learning analytics in the context of TUT Circle, a social media enhanced web service for learning in use at Tampere University of Technology. Through three case studies, we apply the methods of learning analytics for insight into the bursty nature of learning activities, procrastination, peer learning, and co-operation between two academic tribes. We found learning analytics us...

  19. Walking in circles: a modelling approach.

    Science.gov (United States)

    Maus, Horst-Moritz; Seyfarth, Andre

    2014-10-06

    Blindfolded or disoriented people have the tendency to walk in circles rather than on a straight line even if they wanted to. Here, we use a minimalistic walking model to examine this phenomenon. The bipedal spring-loaded inverted pendulum exhibits asymptotically stable gaits with centre of mass (CoM) dynamics and ground reaction forces similar to human walking in the sagittal plane. We extend this model into three dimensions, and show that stable walking patterns persist if the leg is aligned with respect to the body (here: CoM velocity) instead of a world reference frame. Further, we demonstrate that asymmetric leg configurations, which are common in humans, will typically lead to walking in circles. The diameter of these circles depends strongly on parameter configuration, but is in line with empirical data from human walkers. Simulation results suggest that walking radius and especially direction of rotation are highly dependent on leg configuration and walking velocity, which explains inconsistent veering behaviour in repeated trials in human data. Finally, we discuss the relation between findings in the model and implications for human walking. © 2014 The Author(s) Published by the Royal Society. All rights reserved.

  20. The life cycle and life span of Namibian fairy circles.

    Science.gov (United States)

    Tschinkel, Walter R

    2012-01-01

    In Namibia of southwestern Africa, the sparse grasslands that develop on deep sandy soils under rainfall between 50 and 100 mm per annum are punctuated by thousands of quasi-circular bare spots, usually surrounded by a ring of taller grass. The causes of these so-called "fairy circles" are unknown, although a number of hypotheses have been proposed. This paper provides a more complete description of the variation in size, density and attributes of fairy circles in a range of soil types and situations. Circles are not permanent; their vegetative and physical attributes allow them to be arranged into a life history sequence in which circles appear (birth), develop (mature) and become revegetated (die). Occasionally, they also enlarge. The appearance and disappearance of circles was confirmed from satellite images taken 4 years apart (2004, 2008). The frequency of births and deaths as a fraction of the total population of circles allowed the calculation of an approximate turnover rate, and from this, an estimate of circle lifespan. Lifespan appeared to vary with circle size, with small circles averaging about 24 years, and larger ones 43-75 years. Overall lifespan averaged about 41 yr. A second, independent estimate of lifespan was made by revisiting circles 2 to 9 years after their clear status had been confirmed. This resulted in a lifespan estimate of about 60 years. Any causal explanation of fairy circles must include their birth, development and death, their mean lifespan and the variation of their features under different conditions.

  1. Introducing Nine-Point Circle to Junior High School Students

    Science.gov (United States)

    Fiangga, S.; Azizah, M. A. N.; Rini, R. N. K.; Hidayanti, A. N.

    2018-01-01

    The concept of circles is an ancient concept that has appeared since Ancient Egypt from which this concept gives many significant contributions in mathematics’ development until now. Nevertheless, the concept of circles hides many uncover mysterious features that are of applications in mathematics. One of the mysterious features is the Nine-Point Circle. This Nine-point circle is also known as Euler’s circle, six-point circle, Feuerbach’s circle, the twelve-point circle, and many others. Because of these different names, there have been misunderstand among mathematicians about the Nine-Point Circle’s history. Besides, the discussion of Nine-Point Circle can be used to be an initial material to explain elementary geometry topic in junior high school’s level curriculum of 2013. Therefore, this concept needs to be delivered to the students as a geometry introduction. A possible form of the integration historical aspect of Nine-point circle is suggested in this paper as well as its importance in the curriculum of 2013.

  2. Half circle chrome loss by electrochemical effects

    Science.gov (United States)

    Caspary, D.; Jähne, S.; Nesladek, P.; Kristlib, M.; Bahrig, L.; Feicke, A.; Kaiser, M.; Lorbeer, J.; Wandel, T.

    2017-06-01

    For certain designs, we observe a rather peculiar defect during phase-shift mask production. At distinct positions on the mask, the chrome disappears within the second level process in almost perfect half circles. This effect can even be observed if no etching is applied at all. The root cause of this defect is electrochemical dissolving of chrome in DI water during the development rinse process, which appears at locations where the chrome is in contact to the developer rinse medium. In this publication we describe the experimental set-up to investigate the root cause mechanism and propose solutions to overcome the effect.

  3. A Graphical Method for Great Circle Routes

    Directory of Open Access Journals (Sweden)

    Hsu Tien-Pen

    2017-03-01

    Full Text Available A great circle route (GCR is the shortest route on a spherical earth model. Do we have a visual diagram to handle the shortest route? In this paper, a graphical method (GM is proposed to solve the GCR problems based on the celestial meridian diagram (CMD in celestial navigation. Unlike developed algebraic methods, the GM is a geometric method. Appling computer software to graph, the GM does not use any equations but is as accurate as using algebraic methods. In addition, the GM, which emphasizes the rotational surface, can depict a GCR and judge its benefit.

  4. Circle Maps and C*-algebras

    DEFF Research Database (Denmark)

    Schmidt, Thomas Lundsgaard; Thomsen, Klaus

    2015-01-01

    We consider a construction of $C^*$-algebras from continuous piecewise monotone maps on the circle which generalizes the crossed product construction for homeomorphisms and more generally the construction of Renault, Deaconu and Anantharaman-Delaroche for local homeomorphisms. Assuming that the map...... is surjective and not locally injective we give necessary and sufficient conditions for the simplicity of the $C^*$-algebra and show that it is then a Kirchberg algebra. We provide tools for the calculation of the K-theory groups and turn them into an algorithmic method for Markov maps....

  5. Environmental Assessment: Disposition of Chiefs’ Circle Residential Structures

    Science.gov (United States)

    2012-04-27

    Fax (404) 657-1040 http://www.gashpo.org RE: Robins AFB: Conversion of Chiers Circle HD Housing Units to Administrative Functions Houston County...Pennsylvania Ave., NW Suite 809 Washington, DC 20004 29 August 2007 RE: Proposed Demolition of Chiers Circle Historic District and Draft Comprehensive Pr...demolition of the Chiers Circle Historic District. While we appreciate the work you have done to develop a comprehensive programmatic agreement for

  6. Stability of a Perforated Quarter Circle Breakwater

    Directory of Open Access Journals (Sweden)

    ArkalVittal Hegde

    2015-12-01

    Full Text Available Many new types of breakwaters have been constructed of lateto fulfill the ever increasing demand of marine traffic. The quarter circle breakwater (QBW is a recent type of breakwater developed on the lines of an earlier semicircular breakwater (SBW. QBW may be without perforations, seaside perforated or both sides perforated. A series of laboratory experiments were conducted in a two dimensional monochromatic wave flume on an emerged seaside perforated non-overtopping quarter circle breakwater model to study its stability against sliding. The scale of the model was 1:30. A range of incident wave heights (Hi and wave periods (T were generated in the flume simulating the wave climate off Mangaluru coast in the Karnataka State of India. The experimental data so collected was analyzed to understand the variation of the non-dimensional stability parameter with incident wave steepness for different values of dimensionless depth parameter In the end a nomogram was developed for computing the sliding stability of the breakwater.

  7. A mechanism for ramified rolling circle amplification

    Directory of Open Access Journals (Sweden)

    Smith James H

    2010-12-01

    Full Text Available Abstract Background Amplification of single-stranded DNA circles has wide utility for a variety of applications. The two-primer ramified rolling circle amplification (RAM reaction provides exponential DNA amplification under isothermal conditions, creating a regular laddered series of double-stranded DNA products. However, the molecular mechanism of the RAM reaction remains unexplained. Results A RAM reaction model predicts exponential accumulation of a double-stranded DNA product size series, and product-size ratios, that are consistent with observed RAM reaction products. The mechanism involves generation of a series of increasing size intermediate templates; those templates produce RAM products and recursively generate smaller intermediate templates. The model allows prediction of the number of rounds of circular template replication. Real-time RAM reaction data are consistent with the model. Analysis of RAM reaction products shows exponential growth limitation consistent with the model's predictions. Conclusions The model provides a rationale for the observed products of the RAM reaction, and the molecular yield among those products. Experimental results are consistent with the model.

  8. You're a "What"? Santa Claus

    Science.gov (United States)

    Royster, Sara

    2013-01-01

    Professional Santas entertain children and adults during the holiday season at all types of events. They work at shopping malls or stores; entertain crowds at parades and tree lightings; and make appearances at holiday parties, charity events, and people's homes. Most Santas work during the Christmas holiday season, which usually lasts from late…

  9. Efek Suplementasi ENERVON-C dan SANTA-e dalam Pakan terhadap Motilitas Spermatozoa Ayam Kampung

    Directory of Open Access Journals (Sweden)

    Triva Murtina Lubis

    2012-04-01

    Full Text Available Effect of Supplementation of ENERVON-C and SANTA-e in Feed on Sperm Motility of Local Cocks ABSTRACT. This study aimed to observe the effect of supplementation of ENERVON-C and SANTA-e in feed on sperm motility of local cocks. The research was conducted at Reproduction Laboratory, Faculty of Veterinary Medicine, Syiah Kuala University, Banda Aceh. The research used 12 local cocks divided into 4 treatment groups : P0 (feed of 521, P1 (feed of 521 + 200 mg ENERVON-C/kg of feed, P2 (feed of 521 + 200 mg SANTA-e/kg feed and P3 (feed of 521 + 100 mg ENERVON-C/kg of feed and 100 mg SANTA-e/kg of feed. During the research, all cocks were given 100 g of 521 feed/day. Feed with ENERVON-C and SANTA-e was given for 2 weeks before semen collections. Drink was given ad libitum. Data were analysed with analysis of variance and if there are effects among the treatments, analysis will be continued with Duncan Test. Results shows that supplementation of ENERVON-C or SANTA-e and their combination in feed can increase the percentage of sperm motility. There are significant differences (p<0,05 between control and treatment groups. To sum up, supplementation of ENERVON-C or SANTA-e in feed can improve the quality of sperm (motility of local cocks. The sperm quality is better after giving of ENERVON-C and SANTA-e together than single supplementation.

  10. Neurodynamics in Randomly Coupled Circle Maps

    Science.gov (United States)

    Matsuno, Tetsuya; Toko, Kiyoshi; Yamafuji, Kaoru

    1996-05-01

    The dynamics of retrieval processes in a system composed of coupled circle maps is studied by means of a statistical method and numerical simulations. Phase patterns are embedded in coupling parameters so that the system may work as an associative memory system. A parameter, which is an amplification factor multiplied to all the coupling strengths, is introduced for investigating the effect of the strength of the coupling nonlinearity on the behavior of the system concerned. The statistical method provides a set of time evolution equations representing the macroscopic behavior. It is found that the storage capacity is considerably enhanced by the introduced amplification factor. It is also shown that the system exhibits macroscopic chaotic oscillations when the strength of the coupling is sufficiently large. Moreover, the clustering is observed, as in other types of the globally coupled nonlinear systems.

  11. KNOWLEDGE OF JOURNALISM IN THE HERMENEUTIC CIRCLE

    Directory of Open Access Journals (Sweden)

    Christa Berger

    2010-12-01

    Full Text Available In the letters written by Voltaire, Juan Luis Cebrián and AlbertoDines, I find a wisdom originating from experience which istransformed into knowledge for the practice of the profession.In this wisdom there are signs that journalism dialogues with thedisciplines of the social sciences and of language, at the same time that their authors point out the issues which will be transformed into the subject for study according to the theories of journalism. From the wisdom of experience to scientific practice and from the latter to the practice of the profession there is a circulation of knowledge which, in this article, I place in the perspective of thehermeneutic circle indicated by Boaventura de Souza Santos.

  12. Circle Maps and C*-algebras

    DEFF Research Database (Denmark)

    Schmidt, Thomas Lundsgaard

    Let $\\T$ be the unit circle in the complex plane, and let $\\phi:\\T\\to\\T$ be a map which is continuous, surjective and piecewise monotone. We stress that $\\phi$ is allowed to have critical points. This thesis introduces a construction of a two \\'etale groupoids, $\\Gamma_\\phi$, $\\Gamma_\\phi^+$, from...... such a map, generalising the transformation groupoid of a local homeomorphism first introduced by Renault in \\cite{re}. We conduct a detailed study of the relationship between the dynamics of $\\phi$, the properties of these groupoids, the structure of their corresponding reduced groupoid $C^*$-algebras, and......, for certain classes of maps, the K-theory of these algebras. When the map $\\phi$ is transitive, we show that the algebras $C^*_r(\\Gamma_\\phi)$ and $C^*_r(\\Gamma_\\phi^+)$ are purely infinite and satisfy the Universal Coefficient Theorem. Furthermore, we find necessary and sufficient conditions for simplicity...

  13. Quality Circles. Supervising: Technical Aspects of Supervision. The Choice Series #39. A Self Learning Opportunity.

    Science.gov (United States)

    Carlisle, Ysanne

    This student guide is intended to assist persons employed as supervisors to develop and participate in quality circles. Discussed in the first three sections are the following topics: the purpose of quality circles (what a quality circle is, why quality circles developed, how they work, and the roles of various quality circle participants);…

  14. Squaring the circle of healthcare supplies.

    Science.gov (United States)

    Böhme, Tillmann; Williams, Sharon; Childerhouse, Paul; Deakins, Eric; Towill, Denis

    2014-01-01

    The purpose of this paper is to use a systems lens to assess the comparative performance of healthcare supply chains and provide guidance for their improvement. A well-established and rigorous multi-method audit methodology, based on the uncertainty circle model, yields an objective assessment of value stream performance in eight Australasian public sector hospitals. Cause-effect analysis identifies the major barriers to achieving smooth, seamless flows. Potentially high-leverage remedial actions identified using systems thinking are examined with the aid of an exemplar case. The majority of the healthcare value streams studied are underperforming compared with those in the European automotive industry. Every public hospital appears to be caught in the grip of vicious circles of system uncertainty, in large part being caused by problems of their own making. The single exception is making good progress towards seamless functional integration, which has been achieved by elevating supply chain management to a core competence; having a clearly articulated supply chain vision; adopting a systems approach; and, managing supplies with accurate information. The small number of cases limits the generalisability of the findings at this time. Hospital supply chain managers endeavouring to achieve smooth and seamless supply flows should attempt to elevate the status of supplies management within their organisation to that of a core competence, and should use accurate information to manage their value streams holistically as a set of interwoven processes. A four-level prism model is proposed as a useful framework for thus improving healthcare supply delivery systems. Material flow concepts originally developed to provide objective assessments of value stream performance in commercial settings are adapted for use in a healthcare setting. The ability to identify exemplar organisations via a context-free uncertainty measure, and to use systems thinking to identify high

  15. Ground-water quality in the Santa Rita, Buellton, and Los Olivos hydrologic subareas of the Santa Ynez River basin, Santa Barbara County, California

    Science.gov (United States)

    Hamlin, S.N.

    1985-01-01

    Groundwater quality in the upper Santa Ynez River Valley in Santa Barbara County has degraded due to both natural and anthropogenic causes. The semiarid climate and uneven distribution of rainfall has limited freshwater recharge and caused salt buildup in water supplies. Tertiary rocks supply mineralized water. Agricultural activities (irrigation return flow containing fertilizers and pesticides, cultivation, feedlot waste disposal) are a primary cause of water quality degradation. Urban development, which also causes water quality degradation (introduced contaminants, wastewater disposal, septic system discharge, and land fill disposal of waste), has imposed stricter requirements on water supply quality. A well network was designed to monitor changes in groundwater quality related to anthropogenic activities. Information from this network may aid in efficient management of the groundwater basins as public water supplies, centered around three basic goals. First is to increase freshwater recharge to the basins by conjunctive surface/groundwater use and surface-spreading techniques. Second is to optimize groundwater discharge by efficient timing and spacing of pumping. Third is to control and reduce sources of groundwater contamination by regulating wastewater quality and distribution and, preferably, by exporting wastewaters from the basin. (USGS)

  16. Japanese Quality Circles: Can They Work in Education?

    Science.gov (United States)

    Bonner, James S.

    1982-01-01

    Describes the concept of quality circles: small, homogeneous groups of workers who discuss product improvement. The idea originated in Japan and has infiltrated U.S. industry and, ultimately, U.S. schools. Explains the quality circle program in the Muskegon (Michigan) schools and its effects in improving communication among employees and…

  17. Quality Circle: A Tool for the '80s.

    Science.gov (United States)

    Yager, Ed

    1980-01-01

    The quality circle, a group of employees who meet to discuss problems and discover solutions, is receiving increasing attention in organizations concerned with quality, productivity, and morale. Based upon behavioral science concepts, the quality circle technique can be applied to a wide variety of work situations. (SK)

  18. Quality Circles: A Japanese Management Technique for the Classroom.

    Science.gov (United States)

    Kogut, Leonard S.

    1984-01-01

    The use of quality circles in three undergraduate courses in general chemistry at Penn State is described. A key ingredient to the success of a quality circle is that the instructor must be willing to consider student opinions as valid and be willing to make adjustments. (MLW)

  19. Quality Circles: Applications in Vocational Education. Information Series No. 249.

    Science.gov (United States)

    Lloyd, Russell F.; Rehg, Virgil R.

    A strategy for increasing worker participation in an effort to remedy the problems of declining productivity and quality is the quality circles concept. The quality circles process involves small groups of employees who meet voluntarily on a regular basis to identify, analyze, and develop solutions to problems and to implement the solutions when…

  20. Site-Based Management and Quality Circles: A Natural Combination.

    Science.gov (United States)

    Hansen, J. Merrell

    1990-01-01

    Quality circles can be an effective way to strengthen three significant forces influencing school organizations today. Quality circles allow teachers to participate in more meaningful ways, transform the principal's instructional leadership role, and allow site-based management, or bottom-up decision making, to succeed. (MLH)

  1. Talking Circle: Creating Community in our Elementary Classrooms

    Science.gov (United States)

    Triplett, Cheri Foster; Hunter, Anne

    2005-01-01

    A Talking Circle incorporates traditions from various Native American tribes and represents the practice of gathering as a community to solve problems, and the practice of respectful listening. This article describes the benefits of introducing students to a Talking Circle as a way of creating community in the classroom. Having a weekly class…

  2. Research Circles - a method for developing guidance practices

    DEFF Research Database (Denmark)

    2012-01-01

    This video reports on our work with using research circles to improve our understanding of how to provide guidance and counseling to help young people in danger of dropping out of school. The video is based on the paper: Research Circles -- a method for developing guidance practices...

  3. DNA circles with cruciforms from Isospora (Toxoplasma) gondii

    NARCIS (Netherlands)

    Weijers, P.J.; Borst, P.; Overdulve, J.P.; Fase-Fowler, F.; Berg, Marlene van den

    1984-01-01

    We have isolated a closed circular duplex DNA fraction from the unicellular parasite Isospora (Toxoplasma) gondii and examined the purified DNA by electron microscopy. A major part of this circular DNA consists of 12-μm circles containing a cruciform with 0.5-μm tails. We also found 23-μm circles

  4. An Effective Time and Management Strategy in Quality Circles.

    Science.gov (United States)

    Halverson, Don E.

    Contending that participation in quality circles enhances effective time management by school administrators and teachers, this guide provides both a theoretical briefing and practical recommendations for better time management. A pre- posttest prefaces a review of basic concepts of quality circles with reference to the work of Abraham Maslow,…

  5. Families and the Circle of Courage[TM

    Science.gov (United States)

    Garfat, Thom; Van Bockern, Steve

    2010-01-01

    The Circle of Courage philosophy encourages thoughts about the importance of courage in the lives of children and young people--the courage to face what life offers and the resilience to handle life's challenges. Belonging, mastery, independence, and generosity, the four areas identified by the Circle of Courage, are pathways to help young people…

  6. Circle of Courage: Reaching Youth in Residential Care

    Science.gov (United States)

    Lee, Bethany; Perales, Kelly

    2005-01-01

    The Circle of Courage, based on traditional Native American philosophy, emphasizes belonging, mastery, independence, and generosity. This study assessed the prevalence of the Circle of Courage values among youth in a residential facility and examined the relationship between these ideals and indicators of placement success. After 12 weeks in…

  7. Circle packing: experiments in discrete analytic function theory

    OpenAIRE

    Dubejko, Tomasz; Stephenson, Kenneth

    1995-01-01

    Circle packings are configurations of circles with specified patterns of tangency, and lend themselves naturally to computer experimentation and visualization. Maps between them display, with surprising faithfulness, many of the geometric properties associated with classical analytic functions. This paper introduces the fundamentals of an emerging "discrete analytic function theory'' and investigates connections with the classical theory. It then describes several experiment...

  8. Covering a rectangle with six and seven equal circles

    NARCIS (Netherlands)

    Melissen, J.B.M.; Schuur, Peter

    2000-01-01

    In a recent article (Heppes and Melissen, Period. Math. Hungar. 34 (1997) 63–79), Heppes and Melissen have determined the thinnest coverings of a rectangle with up to five equal circles and also for seven circles if the aspect ratio of the rectangle is either between 1 and 1.34457…, or larger than

  9. Geometric Limits of Julia Sets with Parameters on the Circle

    OpenAIRE

    Kaschner, Scott R.; Romero, Reaper; Simmons, David

    2014-01-01

    We show that the geometric limit as $n\\rightarrow\\infty$ of the Julia sets $J(P_{n,c})$ for the maps $P_{n,c}(z) = z^n+c$ does not exist for almost every c on the unit circle. Furthermore, we show that there is always a subsequence along which the limit does exist and equals the unit circle.

  10. Locating a circle on the plane using the minimax criterion

    DEFF Research Database (Denmark)

    Brimberg, Jack; Juel, Henrik; Schöbel, Anita

    2009-01-01

    We consider the problem of locating a circle with respect to existing facilities on the plane, such that the largest weighted distance between the circumference of the circle and the facilities is minimized. The problem properties are analyzed, and a solution procedure proposed...

  11. Empowerment of Children through Circle Time: Myth or Reality?

    Science.gov (United States)

    Collins, Bernie

    2013-01-01

    The focus of this paper is circle time, a widely used method in primary schools in Ireland and elsewhere. It involves children sitting in a circle with their teacher using method-specific techniques and strategies for self-esteem enhancement, promoting positive relationships and development of social skills. Qualitative research was undertaken in…

  12. Circle formation for anonymous mobile robots with order preservation

    NARCIS (Netherlands)

    Wang, Chen; Cao, Ming; Xie, Guangming; Wang, Long

    2012-01-01

    This paper proposes a distributed control law for a group of mobile robots to form any given formation on a circle of a prescribed radius. The robots are modeled by point masses with the constraint that all of them can move only on the circle. In particular, robots are oblivious, anonymous, and

  13. Aboriginal talking circle: Aboriginal perspectives on caribou conservation - Overview by the Aboriginal Talking Circle Coordinating Team

    Directory of Open Access Journals (Sweden)

    Deborah Simmons

    2012-03-01

    Full Text Available The 13th North American Caribou Workshop in 2010 was the venue for a remarkable forum of Aboriginal knowledge holders in which experiences and ideas about caribou research and stewardship were shared in a Talking Circle format. Facilitated by Danny Beaulieu (Denesųłıné /Deninu Kųę First Nation and Walter Bayha (Dé lįnęgotı˛nę/Dé lı˛nę First Nation, the Aboriginal Talking Circle took place over a full day as well as a half day, totalling more than ten hours. At least thirty-six Aboriginal people contributed to the discussion, representing thirty organisations and nearly as many First Nation, Inuit and Métis nations. Delegates converged from a geographical area spanning caribou ranges in six provinces and all three territories of northern Canada.

  14. Exploring quality circles in the provision of therapeutic recreation services.

    Science.gov (United States)

    Wilhite, B; Terry, B; Yoshioka, C F; McLean, D D

    1983-01-01

    This article provides a discussion of the advantages of implementing a Quality Circles program into a therapeutic recreation setting. Quality Circles, a Japanese management concept, has received increased support in American industry and human service organizations. It is founded on the principle of employee involvement and concern for the improvement of the organization. Disadvantages of Quality Circles include: (1) lack of management support; (2) time required to implement; (3) failure to hire consultants; and (4) improper composition of Circles. Advantages of Quality Circles are (1) improved communication; (2) management awareness of employee job-related concerns; (3) personal growth and development; (4) enhanced decision making skills; (5) increased individual power; (5) improved motivation; and (6) opportunities for recognition of individual improvement.

  15. Infraorbital dark circles: definition, causes, and treatment options.

    Science.gov (United States)

    Roh, Mi Ryung; Chung, Kee Yang

    2009-08-01

    Infraorbital dark circles refer to the conditions that present with darkness of the infraorbital eyelids. Although it is not a medical concern, it can be a cosmetic concern for a large number of individuals. Moreover, clear definition and possible causes have not been elucidated. To review the possible causes and treatment options for infraorbital dark circles. The article is based on a review of the medical literature and the author's clinical experience in treating infraorbital dark circles. Possible causative factors of infraorbital dark circles include excessive pigmentation, thin and translucent lower eyelid skin overlying the orbicularis oculi muscle, and shadowing due to skin laxity and tear trough, but because multiple factors cause infraorbital dark circles in the majority of patients, it is essential to identify the cause and choose the appropriate treatment according to the cause.

  16. Santa Barbara Final Technical Report

    Energy Technology Data Exchange (ETDEWEB)

    Hacker, Angela; Hansen, Sherman; Watkins, Ashley

    2013-11-30

    This report serves as the Final Report for Santa Barbara County’s Energy Efficiency and Conservation Block Grant (EECBG) BetterBuildings Neighborhood Program (BBNP) award from the U.S. Department of Energy (DOE). This report explains how DOE BBNP funding was invested to develop robust program infrastructure designed to help property owners complete energy improvements, thereby generating substantial outcomes for the local environment and economy. It provides an overview of program development and design within the grant period, program accomplishments and challenges to date, and a plan for the future sustainability of emPower, the County’s innovative clean energy and building efficiency program. During the grant period, Santa Barbara County’s emPower program primarily targeted 32,000 owner occupied, single family, detached residential homes over 25 years old within the County. In order to help these homeowners and their contractors overcome market barriers to completing residential energy improvements, the program developed and promoted six voluntary, market-based service areas: 1) low cost residential financing (loan loss reserve with two local credit unions), 2) residential rebates, 3) local customer service, 4) expert energy advising, 5) workforce development and training, and 6) marketing, education and outreach. The main goals of the program were to lower building energy use, create jobs and develop a lasting regional building performance market. These services have generated important early outcomes and lessons after the program’s first two years in service. The DOE BBNP funding was extended through October 2014 to enable Santa Barbara County to generate continued outcomes. In fact, funding related to residential financing remains wholly available for the foreseeable future to continue offering Home Upgrade Loans to approximately 1,300 homeowners. The County’s investment of DOE BBNP funding was used to build a lasting, effective, and innovative

  17. An exploration of social circles and prescription drug abuse through Twitter.

    Science.gov (United States)

    Hanson, Carl Lee; Cannon, Ben; Burton, Scott; Giraud-Carrier, Christophe

    2013-09-06

    Prescription drug abuse has become a major public health problem. Relationships and social context are important contributing factors. Social media provides online channels for people to build relationships that may influence attitudes and behaviors. To determine whether people who show signs of prescription drug abuse connect online with others who reinforce this behavior, and to observe the conversation and engagement of these networks with regard to prescription drug abuse. Twitter statuses mentioning prescription drugs were collected from November 2011 to November 2012. From this set, 25 Twitter users were selected who discussed topics indicative of prescription drug abuse. Social circles of 100 people were discovered around each of these Twitter users; the tweets of the Twitter users in these networks were collected and analyzed according to prescription drug abuse discussion and interaction with other users about the topic. From November 2011 to November 2012, 3,389,771 mentions of prescription drug terms were observed. For the 25 social circles (n=100 for each circle), on average 53.96% (SD 24.3) of the Twitter users used prescription drug terms at least once in their posts, and 37.76% (SD 20.8) mentioned another Twitter user by name in a post with a prescription drug term. Strong correlation was found between the kinds of drugs mentioned by the index user and his or her network (mean r=0.73), and between the amount of interaction about prescription drugs and a level of abusiveness shown by the network (r=0.85, PTwitter users who discuss prescription drug abuse online are surrounded by others who also discuss it-potentially reinforcing a negative behavior and social norm.

  18. Sleep disturbances and PTSD: a perpetual circle?

    Directory of Open Access Journals (Sweden)

    Saskia van Liempt

    2012-10-01

    Full Text Available Background : Sleep facilitates the consolidation of fear extinction memory. Nightmares and insomnia are hallmark symptoms of posttraumatic stress disorder (PTSD, possibly interfering with fear extinction and compromising recovery. A perpetual circle may develop when sleep disturbances increase the risk for PTSD and vice versa. To date, therapeutic options for alleviating sleep disturbances in PTSD are limited. Methods : We conducted three studies to examine the relationship between sleep and posttraumatic symptoms: (1 a prospective longitudinal cohort study examining the impact of pre-deployment insomnia symptoms and nightmares on the development of PTSD; (2 a cross-sectional study examining subjective sleep measures, polysomnography, endocrinological parameters, and memory in veterans with PTSD, veterans without PTSD, and healthy controls (HCs; (3 a randomized controlled trial (RCT (n=14 comparing the effect of prazosin and placebo on sleep disturbances in veterans with PTSD. In addition to these studies, we systematically reviewed the literature on treatment options for sleep disturbances in PTSD. Results : Pre-deployment nightmares predicted PTSD symptoms at 6 months post-deployment; however, insomnia symptoms did not. Furthermore, in patients with PTSD, a correlation between the apnea index and PTSD severity was observed, while obstructive sleep apnea syndrome was not more prevalent. We observed a significant increase in awakenings during sleep in patients with PTSD, which were positively correlated with adrenocorticotropic hormone (ACTH levels, negatively correlated with growth hormone (GH secretion, and the subjective perception of sleep depth. Also, heart rate was significantly increased in PTSD patients. Interestingly, plasma levels of GH during the night were decreased in PTSD. Furthermore, GH secretion and awakenings were independent predictors for delayed recall, which was lower in PTSD. In our RCT, prazosin was not associated with

  19. Circle of Willis atherosclerosis, Alzheimer's disease and the Dean number.

    Science.gov (United States)

    Ismailov, Rovshan M

    2013-10-26

    The important role of atherosclerosis in pathophysiology of Alzheimer's Disease has become evident. Mechanisms such as hyperlipidemia, inflammation, abdominal obesity and insulin resistance are important yet they may not fully explain the specific involvement of the Circle of Willis in these pathologies. The Circle of Wills is a complex geometrical structure which has several areas with different curvature as well as various branching angles of vessels composing the circle. The hemodynamics in this region should take into account the Dean number which indicates the influence of curvature on the resistance to blood flow. Thus, areas with various curvature and angles may have different hemodynamics and there are certain areas in the Circle of Willis that are more likely to develop atherosclerotic changes. Therefore, this could suggest the novel pathophysiological pathway resulting from the geometric peculiarities of the Circle of Willis. One of the directions of future research is to examine whether specific areas of the Circle of Willis are more likely to develop atherosclerotic changes compared to other ones. Selective areas of the Circle of Willis affected by atherosclerotic changes could indicate the primary role of atherosclerosis promoting Alzheimer's disease although other pathophysiological mechanisms suggesting the opposite direction should be also examined in prospective studies.

  20. Geršgorin and his circles

    CERN Document Server

    Varga, Richard S

    2004-01-01

    TheGer? sgorin CircleTheorem, averywell-known resultin linear algebra today, stems from the paper of S. Ger? sgorin in 1931 (which is reproduced in AppendixD)where,givenanarbitraryn×ncomplexmatrix,easyarithmetic operationsontheentriesofthematrixproducendisks,inthecomplexplane, whose union contains all eigenvalues of the given matrix. The beauty and simplicity of Ger? sgorin’s Theorem has undoubtedly inspired further research in this area, resulting in hundreds of papers in which the name “Ger? sgorin” appears. The goal of this book is to give a careful and up-to-date treatment of various aspects of this topic. The author ?rst learned of Ger? sgorin’s results from friendly conversations with Olga Taussky-Todd and John Todd, which inspired me to work in this area.Olgawasclearlypassionateaboutlinearalgebraandmatrixtheory,and her path-?nding results in these areas were like a magnet to many, including this author! It is the author’s hope that the results, presented here on topics related to Ger? sgorin...

  1. Teacher Networks Companion Piece

    Science.gov (United States)

    Hopkins, Ami Patel; Rulli, Carolyn; Schiff, Daniel; Fradera, Marina

    2015-01-01

    Network building vitally impacts career development, but in few professions does it impact daily practice more than in teaching. Teacher networks, known as professional learning communities, communities of practice, peer learning circles, virtual professional communities, as well as other names, play a unique and powerful role in education. In…

  2. Geometric fit of a point set by generalized circles

    DEFF Research Database (Denmark)

    Körner, Mark-Christopher; Brimberg, Jack; Juel, Henrik

    2010-01-01

    In our paper we approximate a set of given points by a general circle. More precisely, given two norms k 1 and k 2 and a set of points in the plane, we consider the problem of locating and scaling the unit circle of norm k 1 such that the sum of weighted distances between the circumference...... of the circle and the given points is minimized, where the distance is measured by a norm k 2. We present results for the general case. In the case that k 1 and k 2 are both polyhedral norms, we are able to solve the problem by investigating a finite candidate set....

  3. A Hochschild homology Euler characteristic for circle actions

    OpenAIRE

    Geoghegan, Ross; Nicas, Andrew

    1998-01-01

    We define a "circle Euler characteristic" of a circle action on a compact manifold or finite complex X. It lies in the first Hochschild homology group of ZG where G is the fundamental group of X. It is analogous in many ways to the ordinary Euler characteristic. One application is an intuitively satisfying formula for the Euler class (integer coefficients) of the normal bundle to a smooth circle action without fixed points on a manifold. In the special case of a 3-dimensional Seifert fibered ...

  4. Backscatter [SWATH]--Offshore Santa Cruz, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the acoustic-backscatter map of Offshore of Santa Cruz map area, California. Backscatter data are provided as three separate...

  5. Folds--Offshore of Santa Barbara, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3281 presents data for folds for the geologic and geomorphic map (see sheet 10, SIM 3281) of the Offshore of Santa Barbara map area, California. The...

  6. Habitat--Offshore Santa Cruz, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the habitat map of the seafloor of the Offshore of Santa Cruz map area, California. The vector data file is included in...

  7. Folds--Offshore Santa Cruz, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the folds for the geologic and geomorphic map of the Offshore Santa Cruz map area, California. The vector data file is included...

  8. Faults--Offshore Santa Cruz, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the faults for the geologic and geomorphic map of the Offshore Santa Cruz map area, California. The vector data file is...

  9. Faults--Offshore of Santa Barbara, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3281 presents data for folds for the geologic and geomorphic map (see sheet 10, SIM 3281) of the Offshore of Santa Barbara map area, California. The...

  10. Contours--Offshore Santa Cruz, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore Santa Cruz map area, California. The vector data file is...

  11. La Ex Hacienda de Santa Cruz

    Directory of Open Access Journals (Sweden)

    Berta Pinto de Estrada

    1975-06-01

    Full Text Available Ex hacienda Santa Cruz was chosen to show the differences in the geographic and economic structure, and the historic causes that originated them, as an example of ihe situation in the northem part of Campeche.

  12. Impact of a learning circle intervention across academic and service contexts on developing a learning culture.

    Science.gov (United States)

    Walker, Rachel; Henderson, Amanda; Cooke, Marie; Creedy, Debra

    2011-05-01

    Partnerships between university schools of nursing and health services lead to successful learning experiences for students and staff. A purposive sample of academics and students from a university school of nursing and clinicians from three health institutions involved in clinical learning (n=73) actively participated in a learning circles intervention conducted over 5 months in south east Queensland. Learning circle discussions resulted in enhanced communication and shared understanding regarding: (1) staff attitudes towards students, expectations and student assessment; (2) strategies enhancing preparation of students, mechanisms for greater support of and recognition of clinicians; (3) challenges faced by staff in the complex processes of leadership in clinical nursing education; (4) construction of learning, ideas for improving communication, networking and sharing; and (5) questioning routine practices that may not enhance student learning. Pre-post surveys of hospital staff (n=310) revealed significant differences across three sub-scales of 'accomplishment' (t=-3.98, pLearning circles can positively enhance organisational learning culture. The intervention enabled participants to recognise mutual goals. Further investigation around staff perception of their influence on their workplace is required. Copyright © 2010 Elsevier Ltd. All rights reserved.

  13. Lessons Learned from Native C.I.R.C.L.E., a Culturally Specific Resource.

    Science.gov (United States)

    Garcia, Andrea; Baethke, Lisa; Kaur, Judith S

    2017-12-01

    Cancer is now the second leading cause of death among American Indians and Alaska Natives (AIAN), and trends in cancer-related mortality over the past 2 decades show inferior control in AIAN compared to non-Hispanic Whites. The American Indian/Alaska Native Cancer Information Resource Center and Learning Exchange (Native C.I.R.C.L.E.) was developed in the year 2000 as part of a comprehensive network of partnerships to develop, maintain, and disseminate culturally appropriate cancer and other health information materials for AIAN educators and providers. Now, in its 15th year of existence, enough data has been accumulated by Native C.I.R.C.L.E. to analyze trends in the distribution of culturally relevant cancer information materials and compare access to both printed (hard copy) and online materials. The amount of culturally appropriate materials available since its creation has increased more than 10-fold. Print materials are now distributed throughout the world, and the number of materials requested from print and downloads combined are in the thousands on a monthly basis. Native C.I.R.C.L.E. is in the process of expanding its access and capabilities to target more of the lay AIAN public in order to address the digital divide.

  14. The rolling circle for phiX DNA replication. II. Synthesis of single-stranded circles.

    Science.gov (United States)

    Dressler, D

    1970-12-01

    varphiX-infected cells have been allowed to incorporate tritiated thymidine late in the phage life cycle when single-stranded circles are the product of DNA synthesis. Virtually all of the radioactivity is recovered in a continuum of actively replicating viral DNA molecules. These molecules are termed rolling circle intermediates because they are characterized by three structural properties. They possess positive strands that are longer than the length of a mature viral genome, and negative strands that are covalently closed single-stranded circles. The 3' termini of the long positive strands lie upon the template rings, while the 5' ends are free in solution. From these experimental data, the basic mode of synthesis is deduced to involve the continuous elongation of the open positive strand by endless copying around the circular negative strand template. As new bases are added to the template-bound (3') end of the positive strand, the distal (5') end is displaced from the template ring as a single-stranded tail of increasing length. It is the tail which serves as the source of material for progeny chromosomes. These data confirm our characterization of this varphiX intermediate, which initially was based only on the possession of long positive strands, and extend this characterization to include experimental statements about the circular nature of the template DNA strand, and the 5' to 3' direction of polynucleotide chain growth within the intermediate. Moreover, the description can now be applied to all of the molecules which acquire label during a pulse.

  15. From Quality Circles to Participation: Managing the Transition (Part Two).

    Science.gov (United States)

    Simmons, John

    1985-01-01

    This article draws on the experience of such firms as People Express, General Motors, and Digital Equipment Corporation to illustrate successful transition from quality circle participation to full participation in management. (CT)

  16. Arctic circle: on thin ice : battle for the pole

    National Research Council Canada - National Science Library

    2009-01-01

    ... the most. Shot in HD, at some of the world's most desolate and stunning locations, The Arctic Circle marries dramatic footage with hard science and striking computer graphics to tell the story of climate...

  17. Packing 16, 17 of 18 circles in an equilateral triangle

    NARCIS (Netherlands)

    Melissen, J.B.M.; Schuur, Peter

    1995-01-01

    We present new, efficient packings for 16, 17 and 18 congruent circles in an equilateral triangle. The results have been found by the use of simulated annealing and a quasi-Newton optimization technique, supplemented with some human intelligence.

  18. Parhelic-like circle from light scattering in Plateau borders

    Energy Technology Data Exchange (ETDEWEB)

    Tufaile, A., E-mail: tufaile@usp.br; Tufaile, A.P.B.

    2015-03-06

    We are reporting a new simple optical element to generate halos. We have observed interesting patterns of light scattering in Plateau borders in foams. In analogy to the atmospheric phenomena known as parhelic circle, sun dogs, and sun pillars, we have named the features of the patterns observed as parlaseric circle, laser dogs, and laser pillars. The triangular symmetry of the Plateau borders is analogous to the hexagonal symmetry of ice crystals which produce these atmospheric phenomena. Working with one Plateau border at a time, we have observed wave optics phenomena that are not perceived in the atmospheric phenomena, such as diffraction and interference. - Highlights: • We obtained halo formation from light scattering in a Plateau border using an experiment. • We explained halo formation using geometrical theory of diffraction. • An optical element based on a Plateau border is proposed. • We compared some aspects of the parhelic circle with the parlaseric circle.

  19. The value of circle time as an intervention strategy

    OpenAIRE

    Glazzard, J

    2016-01-01

    Literature on circle time emphasises benefits such as improved self-esteem, improvements in speaking and listening skills and social skills. However, evidence-based research is more limited and much of the available research is anecdotal. Whilst this paper does not offer a systematic evaluation of the impact of circle time on specific groups of children it does synthesise the key arguments in the literature. This paper concludes that is a need for more systematic research on the effects of ci...

  20. Regularity of critical circles in non-twist maps.

    CERN Document Server

    Apte, A; Petrov, N

    2004-01-01

    We study critical invariant circles of several noble rotation numbers at the edge of breakdown for area preserving maps of the cylinder which violate the twist conditions. These circles admit essentially unique parameterizations by rotational coordinates. We present a high accuracy computation of about $10^7$ Fourier coefficients. This allows us to compute the regularity of the conjugating maps and show that, to the extent of the precision, it only depends on the tail of the continued fraction expansion.

  1. Developing Peacemaking Circles in a European Context. Main Report

    OpenAIRE

    Weitekamp, Elmar G. M.

    2015-01-01

    This study represents the background and results of a pilot study to implement peacemaking or healing circles in Europe. Even though victim- offender mediation is well known and applied in various forms in practice, this study explores the possibilities to add the community in this picture. For this pilot study three countries were chosen: Germany, Belgium and Hungary. A total of 30 peace making circles were conducted in these countries and we were able to implement them in these different co...

  2. Comparison of the coaxial circle circuit with the conventional circle circuit.

    Science.gov (United States)

    Mizrak, Ayse; Bilgi, Murat; Koruk, Senem; Ganidagli, Suleyman; Karatas, Erkan; Oner, Unsal; Gul, Rauf; Sahin, Levent

    2011-08-01

    The coaxial circle system helps prevent heat loss during surgery, and it also acts as a humidifier. This study aimed to compare the coaxial breathing system and the conventional system in their ability to warm and moisturize inhaled gases, and we also analyzed lung function protection and saccharin clearance time in patients who underwent tympanomastoidectomy (TMT) with the aid of these two systems. Forty adult patients of ASA physical status I-II were scheduled for elective TMT. A standard volume-dependent ventilator setting was used to establish normocapnia. The coaxial circle system was used in the treated group (n=20), whereas the conventional circuit system was used in the control group (n=20). Saccharin clearance, VC (vital capacity), FRC (functional residual capacity), FEV1 (forced expiratory volume in 1 second), airway pressure, relative humidity and temperature of inspired gas, body temperature and adverse and hemodynamic effects were measured at different perioperative periods. The relative humidity (mg H2O Lt -1) of inspired gas in the treated group was higher than in the control group at 5, 15, 30, 45, 60 and 90 minutes after anesthesia induction. The temperature of inspired gas (Centigrade) in the treated group was higher than in the control group (pcircle system decreased postoperative saccharin clearance time and increased postoperative FRC, relative humidity and the temperature of inspired fresh gas, without any adverse perioperative effects in patients who underwent TMT.

  3. [Implementation and evaluation of quality circles in general practice].

    Science.gov (United States)

    Tausch, B; Härter, M; Niebling, W; Dieter, G; Berger, M

    1995-08-01

    In the beginning of 1993, society of panel doctors Südbaden, Germany, has constituted a group of experts from the Department of General Medicine of the university hospital and practising general practitioners (GPs) to develop an organisational and conceptional framework for setting up quality circles. At present, 23 quality circles with 6-12 participants are holding regular meetings every 4 to 8 weeks in the region of Südbaden. The group members, who are all physicians working in primary health care, are selecting and discussion topics which are important in general practice. In order to facilitate the discussions, the research group has developed predefined guidelines covering a wide range of common and important conditions in general practice (Hypertension, sleeping disorders, diabetes mellitus, COPD, dementia, lower back pain, cardio-vascular disease, depression, headache, vertigo etc). In presenting these structurized guidelines, the moderator prompts and encourage the group members to identify common problems in their own practices. The use of these guidelines in, quality circles and research may provide a starting point for developing consensus guidelines. The quality circle projects is given as systematic evaluation for both participants and moderators at different levels. Main objectives of the assessment are the recruitment, motivation and the specific goals of general practitioners to participate in quality circles. Currently, we are evaluating the development of quality circle for a period of 18 months.

  4. Models to support students’ understanding of measuring area of circles

    Science.gov (United States)

    Rejeki, S.; Putri, R. I. I.

    2018-01-01

    Many studies showed that enormous students got confused about the concepts of measuring area of circles. The main reason is because mathematics classroom practices emphasized on memorizing formulas rather than understanding concepts. Therefore, in this study, a set of learning activities were designed as an innovation in learning area measurement of circles. The activities involved two models namely grid paper and reshaping which are respectively as a means and a strategy to support students’ learning of area measurement of circles. Design research was used as the research approach to achieve the aim. Thirty-eight of 8th graders in Indonesia were involved in this study. In this study, together with the contextual problems, the grid paper and reshaping sectors, which used as the models in this learning, helped the students to gradually develop their understanding of the area measurement of circles. The grid papers plays important role in comparing and estimating areas. Whereas, the reshaping sectors might support students’ understanding of the circumference and the area measurement of circles. Those two models could be the tool for promoting the informal theory of area measurement. Besides, the whole activities gave important role on distinguishing the area and perimeter of circles.

  5. Biology coming full circle: joining the whole and the parts.

    Science.gov (United States)

    Wikswo, John P; Porter, Andrew P

    2015-01-01

    The new cover of Experimental Biology and Medicine features the hermeneutic circle of biology, a concept we have adapted from the hermeneutic principle that one understands the whole only in terms of each part and the parts only in terms of the whole. Our hermeneutic circle summarizes the course of experimental biology through 2500 years of the achievements of reductionist research (understanding the parts), which culminates in our ability to rapidly sequence the genome. Rather than returning along the same path in a constructionist approach that simply builds upon this knowledge, but in reverse, an alternative is to close the circle with synthetic constructions that seek to integrate the full complexity of biological and physiological systems (understanding the whole), of which organs-on-chips are one example. This closing of the circle cannot be a comprehensively accurate representation of biology, but it can be a synthetic one that effectively defines particular biological subsystems. The illustration of the hermeneutic circle of biology is also intended to suggest both the multiple cycles that may be required to reach such a synthesis and the expansion of the circle in an outward spiral as knowledge increases. Our commentary explains the symbolism of the new cover in a philosophical and scientific discussion. © The Author(s) 2015 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

  6. 77 FR 55691 - Establishment of Class E Airspace; Circle Town, MT

    Science.gov (United States)

    2012-09-11

    ... Federal Aviation Administration 14 CFR Part 71 Establishment of Class E Airspace; Circle Town, MT AGENCY... airspace at Circle Town County Airport, Circle Town, MT to accommodate aircraft using new Area Navigation (RNAV) Global Positioning System (GPS) standard instrument approach procedures at Circle Town County...

  7. Three Concentric Circles: Young Chinese English Learners' Perceptions of Purposeful Audiences

    Science.gov (United States)

    Liu, Jack Jinghui

    2015-01-01

    English learners have more access to communicate with different purposeful audiences across the Three Concentric Circles of English (Kachu, 1985): the Inner Circle, the Outer Circle and the Expanding Circle. However, young language learners' purposeful audience as a focus of communication has not been emphasized as much as other linguistic…

  8. Analysis of the symmetric configuration of the circle of Willis in a series of autopsied corpses.

    Science.gov (United States)

    Stojanović, Nebojga; Stefanović, Ivica; Kostić, Aleksandar; Radisavejević, Misa; Stojanov, Dragan; Petrović, Sladjana

    2015-04-01

    The forming of the blood vessels network configuration at the base of the brain and interconnecting of blood vessels during the embryogenesis is directly related to the phylogenetic development of the brain and brain structures. A blood vessel configuration at the brain base, in the form of a ring or a hexagon, stands in direct relation to the perfusion needs of certain parts of the brain during its primary differentiation. The aim of this paper was to determine the incidence of certain blood vessel configurations at the base of the brain and understanding their symmetry or asymmetry. Analysis of the blood vessels at the base of the brain was performed on the autopsied subjects. The object of observation was the anterior segment of the circle of Willis consisting of C1- a. carotis interna (ICA), above a. communicaus posterior (PcoA), the segment A1 a. cerebri anterior (ACA) from a. carotis interna bifurcation to the a. communicans anterior (AcoA) and a communicans anterior itself, as well as the posterior segment consisting of PcoA and the segment P1--a. cerebri posterior (PCA) from the a. basilaris bifurcation to the PcoA. For the purpose of grouping the findings, the four basic configuration types of the circle of Willis were identified based on its symmetry or asymmetry. Type-A (symmetric circle of Willis), type-B (asymmetric circle of Willis' due to the unilateral hypoplastic A1-ACA); type-C (symmetric circle of Willis with bilateral symmetric changes on PcoA) and type-D (asymmetric circle of Willis due to the asymmetric changes on PcoA). Autosy was performed on 56 corpses. A total of 41 (73.2%) subjects were recorded with a symmetric configuration of the circle of Willis', of which 27 (48.2%) subjects had type A and 14 (25%) type C. The asymmetric configuration was present in 15 (26.8%) subjects, of whom 9 (16%) had type B and 6 (10.8%) subjects, of whom 9 (16%) had type B and 6 (10.8%) type D. The symmetric Willis group (73.2%) did not have a homogeneous

  9. Macroeconomia do Turismo Argentino em Santa Catarina

    Directory of Open Access Journals (Sweden)

    Roberto Meurer

    2010-07-01

    Full Text Available Resumo O Estado de Santa Catarina experimentou um considerável crescimento do setor de turismo nas últimas décadas. O fluxo turístico de origem argentina revelou-se um ingrediente importante dessa trajetória. Este artigo focaliza um aspecto pouco explorado, aparentemente, da participação argentina no turismo estadual: a relação entre a situação macroeconômica do país vizinho e a demanda turística por Santa Catarina lá originada. Começa-se abordando brevemente a problemática geral da macroeconomia do turismo. Depois, discorre-se sobre o crescimento desse setor em Santa Catarina, destacando a presença de argentinos. A terceira parte desenvolve uma análise baseada em tratamento estatístico de dados sobre demanda e receita geradas por esses turistas no estado, com exame das correlações envolvendo taxa de câmbio e taxa de crescimento do PIB da Argentina. Palavras-chave: turismo; Santa Catarina; turistas argentinos; economia argentina Abstract The State of Santa Catarina has witnessed a considerable development of its tourist sector in the last decades. The demand from Argentina has proved to be an important factor of that growth. This article deals with a feature of the presence of Argentinians in the state which seems to be scarcely studied: the relationship between the macroeconomic situation of Argentina and the tourist demand in Santa Catarina originated from that country. The first part of the article considers briefly the general issue of tourism macroeconomics. The second one looks upon tourism growth in Santa Catarina, stressing the presence of visitors from Argentine. The third section develops an analysis based on statistical treatment of data concerning demand and income generated by such tourists in Santa Catarina, involving correlations that consider aspects like exchange rate and the rate of GDP increase in Argentina. Keywords: tourism; Santa Catarina; tourists from Argentina; Argentina’s economy

  10. Inferring Social Relations from Online and Communication Networks

    OpenAIRE

    Nasim, Mehwish

    2016-01-01

    In this work analyzed the interplay between social relations in the form of friendship ties, attributes and interaction in online social networks. In this context we analyzed composition of social circles in online social networks and showed that social circles are homophilious with respect to at least one node attribute. We showed that using the right combination of network and interaction features, links can be inferred in online covert networks. We also analyzed longitudinal dyadic interac...

  11. Stable Matching with Incomplete Information in Structured Networks

    OpenAIRE

    Ling, Ying; Wan, Tao; Qin, Zengchang

    2015-01-01

    In this paper, we investigate stable matching in structured networks. Consider case of matching in social networks where candidates are not fully connected. A candidate on one side of the market gets acquaintance with which one on the heterogeneous side depends on the structured network. We explore four well-used structures of networks and define the social circle by the distance between each candidate. When matching within social circle, we have equilibrium distinguishes from each other sinc...

  12. The E-learning Circle – a holistic software design tool for e-learning

    OpenAIRE

    Kolås, Line; Staupe, Arvid

    2010-01-01

    The article introduces the E-learning Circle, a tool developed to assure the quality of the software design process of e-learning systems, considering pedagogical principles as well as technology. The E-learning Circle consists of a number of concentric circles which are divided into three sectors. The content of the inner circles is based on pedagogical principles, while the outer circle specifies how the pedagogical principles may be implemented with technology. The circle’s centre is dedic...

  13. White matter disease and an incomplete circle of Willis.

    Science.gov (United States)

    Ryan, Daniel James; Byrne, Susan; Dunne, Ruth; Harmon, Mark; Harbison, Joseph

    2015-06-01

    White matter disease occurs as a consequence of small vessel disease; however, hypoperfusion may also play a role. We investigated whether patients with less cerebral vessel anastomosis may develop more white matter disease. Magnetic resonance imaging (1.5t) with intracranial magnetic resonance angiography data was collected on a convenience sample between July 2008 and January 2009. All patients were independently assessed for circle of Willis variants by two researchers and categorized into two groups: those with a complete circle of Willis and those with an incomplete circle of Willis (absent vessels). The complete group was sub-divided into a classical group (entirely normal circle of Willis) and a hypoplastic group (hypoplasia but no absent vessels). White matter disease assessment was conducted for these groups, by two researchers blind to magnetic resonance angiography findings, on all patients over 50 years old. The circle of Willis was characterized in 163 patients, while 90 (>50 years) underwent white matter disease assessment. The kappa inter-rater reliability between both circle of Willis assessors and between both white matter disease assessors was 0.57 and 0.63, respectively. The prevalence of circle of Willis variants strongly correlated with the seminal paper by Riggs and Rupp. Independent of age and gender, those with an incomplete circle of Willis (n = 68) exhibited 58% more white matter disease than those with a complete circle of Willis (n = 22) (white matter disease score 6.52 vs. 4.11, respectively, P = 0.03). Patients with absent anterior vessels exhibited more frontal white matter disease than those with intact anterior vessels (3.7 vs. 1.72, P < 0.001). Patients with absent posterior vessels exhibited more occipital white matter disease than those with intact posterior vessels (2.52 vs. 1.34, P = 0.014). These data suggest that congenital absence of anastomotic capacity correlates with incident white matter disease, thus

  14. Ethical dimension of circle Integrative Community Therapy on qualitative research

    Directory of Open Access Journals (Sweden)

    Paula Renata Miranda dos Santos

    2014-12-01

    Full Text Available This study discusses ethical issues in research involving human beings and seeks to understand the relationship between qualitative research and the ethical care guidelines for Integrative Community Therapy (ICT circles based on Resolution 466/12 of the National Health Council of the Ministry of Health of Brazil. This is documentary research, which analyzed Resolution 466/12 and ICT circles seeking to make a connection between the ethical guidelines contained in both. The analysis of the corpus was directed toward the construction of the following results: the person's perception, cultural diversity and community. It also brings in consideration of the influence of the ethical dimension of the ICT circles on qualitative research. We conclude that ICT circles are innovative in the sense of the diversity of participants and respect for cultural and social differences. Thus, ICT circles promote acquisition of quality information for social research as well as compliance with the ethical guidelines outlined in Resolution No. 466/12.

  15. [Acceptance of dental care guidelines by quality circles].

    Science.gov (United States)

    Bergmann-Krauss, Barbara; Micheelis, Wolfgang; Szecsenyi, Joachim

    2010-01-01

    The discussion about the advantages of evidence-based guidelines in daily dental practice is a matter of current interest. In this report three high-quality S3 level pilot guidelines which have been developed in dental medicine were evaluated under practice conditions. Quality circles in the city of Hamburg readily accepted to join this survey. By means of a questionnaire before and after a 4-month field test in dental practices the participants of quality circles were interviewed about their attitude towards guidelines and to the application of the guidelines. In addition, the experience gained with the application of the guidelines was incorporated into a group discussion with moderators of quality circles. The inclusion of quantitative and qualitative methods enabled a recording of the complete range of differentiated opinions concerning the application of guidelines. The results show that the concerns expressed by participants can be reduced by integrating guidelines in their everyday clinical practice. A strength and weakness analysis demonstrates that the quality circle moderators' attitudes towards approved guidelines range from rather positive to ambivalent. Field testing by quality circles proves to be a sound method for evaluating the acceptance of guidelines in daily practice. Copyright © 2009. Published by Elsevier GmbH.

  16. Ethical dimension of circle Integrative Community Therapy on qualitative research

    Directory of Open Access Journals (Sweden)

    Paula Renata Miranda dos Santos

    Full Text Available This study discusses ethical issues in research involving human beings and seeks to understand the relationship between qualitative research and the ethical care guidelines for Integrative Community Therapy (ICT circles based on Resolution 466/12 of the National Health Council of the Ministry of Health of Brazil. This is documentary research, which analyzed Resolution 466/12 and ICT circles seeking to make a connection between the ethical guidelines contained in both. The analysis of the corpus was directed toward the construction of the following results: the person's perception, cultural diversity and community. It also brings in consideration of the influence of the ethical dimension of the ICT circles on qualitative research. We conclude that ICT circles are innovative in the sense of the diversity of participants and respect for cultural and social differences. Thus, ICT circles promote acquisition of quality information for social research as well as compliance with the ethical guidelines outlined in Resolution No. 466/12.

  17. Circles of Support and personalization: Exploring the economic case.

    Science.gov (United States)

    Wistow, Gerald; Perkins, Margaret; Knapp, Martin; Bauer, Annette; Bonin, Eva-Maria

    2016-06-01

    Circles of Support aim to enable people with learning disabilities (and others) to live full lives as part of their communities. As part of a wider study of the economic case for community capacity building conducted from 2012 to 2014, we conducted a mixed methods study of five Circles in North West England. Members of these Circles were supporting adults with moderate to profound learning disabilities and provided accounts of success in enabling the core member to live more independent lives with improved social care outcomes within cost envelopes that appeared to be less than more traditional types of support. The Circles also reported success in harnessing community resources to promote social inclusion and improve well-being. This very small-scale study can only offer tentative evidence but does appear to justify more rigorous research into the potential of Circles to secure cost-effective means of providing support to people with learning disabilities than the alternative, which in most cases would have been a long-term residential care placement. © The Author(s) 2016.

  18. Talking Circles for Adolescent Girls in an Urban High School

    Directory of Open Access Journals (Sweden)

    Ann Schumacher

    2014-10-01

    Full Text Available Restorative Practices (RP in schools is a new and emerging field. Meeting in Circles to build friendships, develop emotional literacy skills, resolve conflict, or learn interactively are some of the core components of these programs. This article describes a 2-year study of 12 weekly Talking Circles organized under the auspices of a RP program in an urban high school with 60 adolescent girls. Primary data sources included 257 hr of participant observations in Talking Circles and individual, semi-structured interviews with 31 students. The Relational Cultural model, rooted in the work of Jean Baker Miller, served as the conceptual framework for understanding teens’ interactions within the Circle’s unique set of social conditions in a school environment. Findings demonstrated that Talking Circles provided a safe space for peers helping peers, and that the girls improved their listening, anger management, and empathic skills, which led to greater self-efficacy. It appears that Talking Circles could provide another venue for developing social-emotional literacy skills and growth-fostering relationships in schools.

  19. Circle Detection Using an Electromagnetism-Inspired Algorithm

    Directory of Open Access Journals (Sweden)

    Cuevas E.

    2011-10-01

    Full Text Available The Physic-inspired computation is becoming popular and has been acknowledged by the scientific community. This emerging area has developed a wide range of techniques and methods for dealing with complex problems. On the other hand, automatic circle detection in digital images has been considered as an important and complex task for the computer vision community that has devoted a tremendous amount of research seeking for an optimal circle detector. This article presents an algorithm for the automatic detection of circular shapes embedded into complicated and noisy images with no consideration of the conventional Hough transform techniques. The approach is based on a nature-inspired technique called the Electromagnetism- Like Optimization (EMO which is a heuristic method following electromagnetism principles for solving complex optimization problems. For the EMO algorithm, solutions are built considering the electromagnetic attraction and repulsion among charged particles with a charge representing the fitness solution for each particle. The algorithm uses the encoding of three non-collinear points as candidate circles over an edge-only image. Guided by the values of the objective function, the set of encoded candidate circles (charged particles are evolved using the EMO algorithm so that they can fit into the actual circles on the edge map of the image. Experimental results from several tests on synthetic and natural images with a varying range of complexity are included to validate the efficiency of the proposed technique regarding accuracy, speed, and robustness.

  20. A vitivinicultura de altitude em Santa Catarina

    OpenAIRE

    Losso, Flavia Baratieri

    2016-01-01

    Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-Graduação em Geografia, Florianópolis, 2016. O presente estudo analisou as relações entre a formação sócio-espacial, a produção e o consumo de vinhos finos de altitude em Santa Catarina como indutores do desenvolvimento do Enoturismo no Estado mediante o entendimento de que este tipo de turismo poderá intervir na economia do vinho, agregando valor e influenciando o consumo des...

  1. 27 CFR 9.217 - Happy Canyon of Santa Barbara.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Happy Canyon of Santa... Areas § 9.217 Happy Canyon of Santa Barbara. (a) Name. The name of the viticultural area described in this section is “Happy Canyon of Santa Barbara”. For purposes of part 4 of this chapter, “Happy Canyon...

  2. 33 CFR 80.1102 - Santa Catalina Island, CA.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Santa Catalina Island, CA. 80... INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Pacific Coast § 80.1102 Santa Catalina Island, CA. The 72 COLREGS shall apply to the harbors on Santa Catalina Island. ...

  3. Co-Constructing Knowledge through NGO-Driven Circle Work

    DEFF Research Database (Denmark)

    Agerbæk, Jonas

    This presentation revolves around the question of what degree of control, if any, the users participating in NGO-driven development programs may have over their own development. Based on a multi-sited ethnography of NGO organizing and communication that I conducted in the period of 2010 to 2015......, and with a special analytical focus on the facilitating role of frontline NGO workers in rural East Africa, this presentation discusses enabling and constraining aspects of using circle work to co-produce knowledge in international development. More particularly I am focusing an approach to circle work called...

  4. THE SOCIAL ISSUE AND THE RECIFE WORK CIRCLES

    Directory of Open Access Journals (Sweden)

    Carlos Miranda

    1996-12-01

    Full Text Available The article addresses the Christian movements among the workers in Brazil. The question goes back to Pope Leo XIII's encyclical Rerum Novarum. At the heart of this relationship is the inseparability between the workers' movements, the Church and the State, opposing the socialist movements. Pernambuco was the pioneering center of the working circles. these were processed from the beginning of the twentieth century to the end of the New State when its decline is observed. The peak of the Operational Circles takes place during the Vargas dictatorship in Pernambuco, under the intervention of Agamenon Magalhães.

  5. A simple algorithm for computing the smallest enclosing circle

    DEFF Research Database (Denmark)

    Skyum, Sven

    1991-01-01

    Presented is a simple O(n log n) algorithm for computing the smallest enclosing circle of a convex polygon. It can be easily extended to algorithms that compute the farthest-and the closest-point Voronoi diagram of a convex polygon within the same time bound.......Presented is a simple O(n log n) algorithm for computing the smallest enclosing circle of a convex polygon. It can be easily extended to algorithms that compute the farthest-and the closest-point Voronoi diagram of a convex polygon within the same time bound....

  6. Identifcation of circles from datapoints using the Legendre transform

    CERN Document Server

    Alexopoulos, T.; Leontsinis, S.; Ntekas, K.; Polychronakos, V.

    2014-01-01

    In this paper we present a method of reconstructing the circle parameters from a set of datapoints on a plane. The method is based on the geometrical Legendre transform. We test the method under various scenarios using Monte Carlo generated data. These scenarios include variation of the noise hits percentage, uncertainties in the hit position and the number of datapoints. The technique is proven to be robust and provide quickly and effciently very accurate results. Furthermore, the use of the geometrical Legendre transform method for the identifcation of two overlapping circles is shown.

  7. The core of C*-algebras associated with circle maps

    DEFF Research Database (Denmark)

    Johannesen, Benjamin Randeris

    2017-01-01

    The relationship between dynamical systems and operator algebras is one that has been fruitful and mutually beneficial and is by now both well-established, -aged and -matured. This thesis contribute in developing the relationship between dynamical systems, groupoids and operator algebra for circle...... dynamics. Another aspect of this thesis are the results solely about dynamics on the unit circle. The reader is supposed to be well versed in C*-algebras and K-theory (and classification). The reader is not assumed to be familiar with dynamical system theory nor with groupoids....

  8. Circles Disturbed The Interplay of Mathematics and Narrative

    CERN Document Server

    Doxiadis, Apostolos

    2012-01-01

    Circles Disturbed brings together important thinkers in mathematics, history, and philosophy to explore the relationship between mathematics and narrative. The book's title recalls the last words of the great Greek mathematician Archimedes before he was slain by a Roman soldier--"Don't disturb my circles"--words that seem to refer to two radically different concerns: that of the practical person living in the concrete world of reality, and that of the theoretician lost in a world of abstraction. Stories and theorems are, in a sense, the natural languages of these two worlds--stories represent

  9. The role of Willis circle variations during unilateral selective cerebral perfusion: a study of 500 circles.

    Science.gov (United States)

    Papantchev, Vassil; Stoinova, Vesela; Aleksandrov, Alexander; Todorova-Papantcheva, Daniela; Hristov, Stanislav; Petkov, Dimitar; Nachev, Gencho; Ovtscharoff, Wladimir

    2013-10-01

    During unilateral selective cerebral perfusion (uSCP), with right axillary artery or brachiocephalic trunk cannulation, the brain receives blood only via the right common carotid artery and right vertebral artery (VA). The left hemisphere is perfused mainly through the circle of Willis (CW). However, at least 50% of individuals have some variation in the CW. The aim of the present work was to study the variations in CW and VA that could have an impact on haemodynamics during uSCP. From May 2005 to March 2012, a total number of 250 circles obtained via routine dissection for medico-legal reasons were examined. The external diameters of all CW segments and both VAs were measured. From January 2008 to March 2012, a total number of 250 patients subjected to computed tomographic angiography of the CW were also examined. Nine evident configurations of the CW that could cause hypoperfusion during uSCP were observed. They were subdivided in to seven types, according to location and the number of major vessels at risk of hypoperfusion. Type IA: hypo/aplasia of left posterior communicating artery (PComA), found in 35.6% of cases; Type IB: hypo/aplasia of anterior communicating artery (AComA), found in 2% of cases; Type IIA: hypo/aplasia of both left PComA and AComA, found in 4.8% of cases; Type IIB: hypo/aplasia of precommunicating (P1) segment of left posterior cerebral artery or right VA, found in 9.2% of cases; Type IIIA: hypo/aplasia of precommunicating (A1) segment of right anterior cerebral artery, found in 6% of cases; Type IIIB: hypo/aplasia of both right VA and AComA, found in 0.2% of cases; Type IV: hypo/aplasia of both right A1 and right VA or both right A1 and left P1, found in 0.8% of cases. All types were present in 58.6% of all examined CWs. Our results show that CW variations are present in a significant number of patients. Our data support the need for extensive preoperative examination and meticulous intraoperative monitoring of cerebral perfusion during u

  10. Ecotourism: The Santa Elena Rainforest Project.

    Science.gov (United States)

    Wearing, Stephen

    1993-01-01

    Describes an ecotourism project in which the community of Santa Elena, Costa Rica, are developing a rainforest reserve on government land leased permanently to the local high school. Discusses the impact of the project on the community's economy and environment. (Contains 30 references.) (MDH)

  11. Contours--Offshore of Santa Barbara, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3281 presents data for the bathymetric contours for several seafloor maps (see sheets 1, 2, 3, 7, 10, SIM 3281) of the Offshore of Santa Barbara map...

  12. Freshwater Fishes, Ilha de Santa Catarina, southern coastal drainage of the state of Santa Catarina, Brazil

    Directory of Open Access Journals (Sweden)

    Bertaco, V. A.

    2009-01-01

    Full Text Available The ilha de Santa Catarina is situated in southern Brazil, Atlantic Forest, in the state of Santa Catarina,municipality of Florianópolis. Fish specimens were collected in 15 sampling points along the drainages of rio CórregoGrande, rio Palha, rio Ratones, rio Tavares, rio Vermelho, as well as in the channel of lagoa do Peri. Specimensbelonging to 16 species (one of them exotic were collected, distributed in 12 families and six orders.

  13. The Dual Role of Cerebral Autoregulation and Collateral Flow in the Circle of Willis After Major Vessel Occlusion.

    Science.gov (United States)

    Kennedy McConnell, Flora; Payne, Stephen

    2017-08-01

    Ischaemic stroke is a leading cause of death and disability. Autoregulation and collateral blood flow through the circle of Willis both play a role in preventing tissue infarction. To investigate the interaction of these mechanisms a one-dimensional steady-state model of the cerebral arterial network was created. Structural variants of the circle of Willis that present particular risk of stroke were recreated by using a network model coupled with: 1) a steady-state physiological model of cerebral autoregulation; and 2) one wherein the cerebral vascular bed was modeled as a passive resistance. Simulations were performed in various conditions of internal carotid and vertebral artery occlusion. Collateral flow alone is unable to ensure adequate blood flow ([Formula: see text] normal flow) to the cerebral arteries in several common variants during internal carotid artery occlusion. However, compared to a passive model, cerebral autoregulation is better able to exploit available collateral flow and maintain flows within [Formula: see text] of baseline. This is true for nearly all configurations. Hence, autoregulation is a crucial facilitator of collateral flow through the circle of Willis. Impairment of this response during ischemia will severely impact cerebral blood flows and tissue survival, and hence, autoregulation should be monitored in this situation.

  14. [Goals and reality of quality circles in outpatient care in Germany].

    Science.gov (United States)

    Härter, M; Tausch, B

    2004-02-01

    In Germany's outpatient care, quality circles are strongly encouraged as a tool for peer review in order to implement quality assurance and management in daily practice. This paper presents an overview of the status of implementing quality circles in outpatient care. The main features of successful quality circles are described in terms of conditions, structures, and methodological approach. The objectives of quality circles are outlined, and it is discussed to which extent the quality circle concept is established. Recommendations for further developments of quality circles are drawn from this analysis.

  15. Types of the cerebral arterial circle (circle of Willis in a Sri Lankan Population

    Directory of Open Access Journals (Sweden)

    Gunasekera WSL

    2011-01-01

    Full Text Available Abstract Background The variations of the circle of Willis (CW are clinically important as patients with effective collateral circulations have a lower risk of transient ischemic attack and stroke than those with ineffective collaterals. The aim of the present cadaveric study was to investigate the anatomical variations of the CW and to compare the frequency of prevalence of the different variations with previous autopsy studies as variations in the anatomy of the CW as a whole have not been studied in the Indian subcontinent. Methods The external diameter of all the arteries forming the CW in 225 normal Sri Lankan adult cadaver brains was measured using a calibrated grid to determine the prevalence in the variation in CW. Chisquared tests and a correspondence analysis were performed to compare the relative frequencies of prevalence of anatomical variations in the CW across 6 studies of diverse ethnic populations. Results We report 15 types of variations of CW out of 22 types previously described and one additional type: hypoplastic precommunicating part of the anterior cerebral arteries (A1 and contralateral posterior communicating arteries (PcoA 5(2%. Statistically significant differences (p Conclusion The present study reveals that there are significant variations in the CW among intra and inter ethnic groups (Caucasian, African and Asian: Iran and Sri Lanka dominant populations, and warrants further studies keeping the methods of measurements, data assessment, and the definitions of hypoplasia the same.

  16. Preliminary geologic map of the Santa Barbara coastal plain area, Santa Barbara County, California

    Science.gov (United States)

    Minor, Scott A.; Kellogg, Karl S.; Stanley, Richard G.; Stone, Paul; Powell, Charles L.; Gurrola, Larry D.; Selting, Amy J.; Brandt, Theodore R.

    2002-01-01

    This report presents a new geologic digital map of the Santa Barbara coastal plain area at a compilation scale of 1:24,000 (one inch on the map = 2,000 feet on the ground) and with a horizontal positional accuracy of at least 20 m. This preliminary map depicts the distribution of bedrock units and surficial deposits and associated deformation underlying and adjacent to the coastal plain within the contiguous Santa Barbara and Goleta 7.5' quadrangles. A planned second version will extend the mapping westward into the adjoining Dos Pueblos Canyon quadrangle and eastward into the Carpinteria quadrangle. The mapping presented here results from the collaborative efforts of geologists with the U.S. Geological Survey Southern California Areal Mapping Project (SCAMP) (Minor, Kellogg, Stanley, Stone, and Powell) and the tectonic geomorphology research group at the University of California at Santa Barbara (Gurrola and Selting). C.L. Powell, II, performed all new fossil identifications and interpretations reported herein. T.R. Brandt designed and edited the GIS database,performed GIS database integration and created the digital cartography for the map layout. The Santa Barbara coastal plain is located in the western Transverse Ranges physiographic province along a west-trending segment of the southern California coastline about 100 km (62 mi) northwest of Los Angeles. The coastal plain region, which extends from the Santa Ynez Mountains on the north to the Santa Barbara Channel on the south, is underlain by numerous active and potentially active folds and partly buried thrust faults of the Santa Barbara fold and fault belt. Strong earthquakes that occurred in the region in 1925 (6.8 magnitude) and 1978 (5.1 magnitude) are evidence that such structures pose a significant earthquake hazard to the approximately 200,000 people living within the major coastal population centers of Santa Barbara and Goleta. Also, young landslide deposits along the steep lower flank of the Santa

  17. Network versus Economic Incentives

    DEFF Research Database (Denmark)

    Larsen, Christian Albrekt

    might be an important part of the vicious circles of unemployment. Finally, the article analyse the importance of network versus the importance of economic incentives. The result supports the thesis that economic sociology provides a better account of the transition from unemployment to employment than...

  18. Quality Circles: Answers to 100 Frequently Asked Questions.

    Science.gov (United States)

    Dewar, Donald L.

    This booklet contains frequently asked questions--and their answers--about "quality circles," a factory program first introduced in Japan in which workers participate voluntarily in quality control and management decisions through various means of communication. Following an introductory chapter, the remainder of the booklet answers…

  19. Revisiting Cyberbullying in Schools Using the Quality Circle Approach

    Science.gov (United States)

    Paul, Simone; Smith, Peter K.; Blumberg, Herbert H.

    2012-01-01

    An earlier study reported the use of Quality Circles (QC) in a UK school in the context of understanding and reducing bullying and cyberbullying. Here, we report further work in the same school setting. The QC approach allows explorative analysis of problems in school settings, whereby students embark on a problem-solving exercise over a period of…

  20. Majorization algorithms for inspecting circles, ellipses, squares, rectangles, and rhombi

    NARCIS (Netherlands)

    K. van Deun; P.J.F. Groenen (Patrick)

    2003-01-01

    textabstractIn several disciplines, as diverse as shape analysis, location theory, quality control, archaeology, and psychometrics, it can be of interest to fit a circle through a set of points. We use the result that it suffices to locate a center for which the variance of the distances from the

  1. "Talking Circle": Conversation and Negotiation in the ESL Classroom.

    Science.gov (United States)

    Ernst, Gisela

    1994-01-01

    In a microethnographic study of an elementary second-language (L2) classroom, one recurring event of the classroom, the "talking circle," is analyzed in terms of its topic development, social demands, and communicative dimensions. It is argued that L2 students need abundant practice in turn-taking, interrupting, and listening. (Contains…

  2. Examining Circle of Security™: A Review of Research and Theory

    Science.gov (United States)

    Mercer, Jean

    2015-01-01

    The Circle of Security™ interventions are psychosocial treatments intended to increase maternal sensitivity and thus child attachment security in infants and young children. A small number of publications have reported empirical research on outcomes of these treatments. This article reviews the research evidence, plausibility, theoretical…

  3. Language Teachers through the Looking Glass: Expanding Circle Teachers' Discourse

    Science.gov (United States)

    Lovtsevich, Galina N.

    2005-01-01

    When English language teachers from Russia join in professional discourse with their counterparts from other countries, they do so in English, using a professional register which is, to a large extent, determined by language teaching theorists and practitioners in Inner Circle countries. This paper examines some of the issues surrounding…

  4. Circle Time for Social and Emotional Learning in Primary School

    Science.gov (United States)

    Cefai, Carmel; Ferrario, Erika; Cavioni, Valeria; Carter, Audrey; Grech, Tracy

    2014-01-01

    This paper discusses the findings and implications of a semi-randomised control trial study on the effectiveness of circle time (CT) on primary school students' social and emotional learning, as well as classroom teachers' and students' experience of CT. A social and emotional learning programme was delivered through CT by trained classroom…

  5. Uncertainty budget for optical coordinate measurements of circle diameter

    DEFF Research Database (Denmark)

    Morace, Renate Erica; Hansen, Hans Nørgaard; De Chiffre, Leonardo

    2004-01-01

    An uncertainty analysis for circle diameter measurements using a coordinate measuring machine (CMM) equipped with an optical probe is presented in this paper. A mathematical model for data evaluation and uncertainty assessment was formulated in accordance with Guide to the Expression of Uncertainty...

  6. Circle Maps and the Devil's Staircase in a Chemical Oscillator

    DEFF Research Database (Denmark)

    Brøns, Morten; Gross, P.; Bar-Eli, K.

    1996-01-01

    We explain numerical results on a periodically perturbed Oregonator by Markman and Bar-Eli (J. Phys. Chem. 98 12248 (1994)). If the dynamics of the system is governed by a family of diffeomorphisms of a circle with a Devil's staircase one will expect the observed behavior, i.e. (1) Only periodic ...

  7. Full circle? Renato Amato's literary antipodes 1 | Hill | Italian Studies ...

    African Journals Online (AJOL)

    Il titolo stesso dell'opera di Amato The Full Circle of the Travelling Cuckoo (1967) rivela il senso di dislocazione dello scrittore migrante ma, al contempo, ne indica la capacità di riconciliarsi con il proprio difficile passato e di adattarsi alla sua patria adottiva, la Nuova Zelanda. Amato (1928-1964) ha dato un contribuito ...

  8. The rolling circle amplification and next generation sequencing ...

    African Journals Online (AJOL)

    This is an innovative approach that utilizes the robustness of the bacteriophage phi29 DNA polymerase used in circle amplification, together with deep sequencing using Illumina Miseq and bioinformatics to assess population diversity of begomoviruses in naturally infected cassava. The approach is suitable for detecting ...

  9. The magic of fairy circles: Built or created?

    Science.gov (United States)

    Sahagian, Dork

    2017-05-01

    Fairy circles are rings of relatively dense grass in arid regions with sparse vegetation. The most famous examples are found in the Namib Desert. There has been an ongoing debate regarding the origin of these features, and a recent paper by Ravi et al. (2017, doi:10.1002/2016JG003604) sheds some light on this situation.

  10. Quality Productivity Circle in Manufacture | Achi | Nigerian Journal of ...

    African Journals Online (AJOL)

    A brief history of quality control and productivity is hereby traced. The cultural implications of quality Circle management technique are discussed in its relationship with productivity. The paper emphasizes the role of total preventive maintenance in productivity and quality improvements. In all these the workforce holds the ...

  11. The power of Nutrition Impact and Positive Practice (NIPP) Circles

    African Journals Online (AJOL)

    promoting the use of high-energy, high-nutrient. • recipes through participatory cooking practices, stimulating behaviour change to improve household ... garden in Baliet County, Upper Nile State (credit Frank Okello). Figure 2. Female NIPP circle session in Ulang County, Upper. Nile State showing female participants ...

  12. Assessment of the Circle of Willis with Cranial Tomography Angiography.

    Science.gov (United States)

    Karatas, Ayse; Coban, Gokmen; Cinar, Celal; Oran, Ismail; Uz, Aysun

    2015-09-06

    The circle of Willis is a major collateral pathway important in ischemic conditions. The aim of our study was to assess the structural characteristics of the circle of Willis within the Turkish adult population, along with variations and arteries involved in the measurement of diameters and lengths on cranial computed tomography angiography (CTA). One hundred adult patients who underwent CTA images were evaluated retrospectively. Results of the study revealed 82% adult, 17% fetal, and 1% transitional configurations. A complete polygonal structure was observed in 28% of cases. Variations of the circle of Willis were more common in the posterior portion. Hypoplasia was found to be the most common variation and was observed as a maximum in the posterior communicating artery (AComP). The patency and size of arteries in the circle of Willis are important in occlusive cerebrovascular diseases and cerebrovascular surgery. Although CTA is an easily accessible non-invasive clinical method for demonstrating the vascular structure, CTA should be evaluated taking into account image resolution quality and difficulties in the identification of small vessels.

  13. Modeling of human circle of Willis with and without aneurisms.

    Science.gov (United States)

    Ivanov, Dmitry; Dol, Alexander; Pavlova, Olga; Aristambekova, Asel

    2014-01-01

    This paper includes results of the first stage of research aimed at the development of recommendations for physicians in order to help them to choose a particular type of cerebral arteries aneurysms treatment. Recent studies show that the majority of aneurysms develop as a result of hemodynamic and degenerative lesions of the vascular wall. Obviously, such wall damage can be studied using the methods of continuum mechanics and numerical simulations. Biomechanical modelling allows us to study hemodynamic parameters and stress-strain state of these arteries in health and disease, and to formulate practical recommendations for the necessity and reasonable selection of a particular type of cerebral arteries aneurysm treatment. At this stage the realistic geometric models of arterial circle of Willis were built for its normal state and in the presence of aneurysms. The ultrasound analysis of circle of Willis was conducted in order to obtain blood flow parameters and the boundary conditions for carotid and vertebral arteries. Also, the mechanical properties of these arteries were investigated and constants of the Mooney-Rivlin strain energy function were obtained. Thus, the boundary problem describing the behaviour of human Willis circle arteries was stated. Further, this problem will be solved numerically using the finite element method. The numerical results will be analyzed from the point of view of the influence of the mechanical factors on the emergence, growth and rupture of circle of Willis aneurysms.

  14. Problem Posing and Problem Solving in a Math Teacher's Circle

    Science.gov (United States)

    Appleton, Eric; Farina, Solange; Holzer, Tyler; Kotelawala, Usha; Trushkowsky, Mark

    2017-01-01

    This article describes the New York City Community of Adult Math Instructors (CAMI), a math teachers' circle founded in November 2014. The authors share details about their own participation in CAMI to show the professional growth that research-based, peer-led professional development can offer for adult educators.

  15. The Governance of Australia. Civics and Citizenship Learning Circle Kit.

    Science.gov (United States)

    Gow, Neil

    This kit, the first of four learning circles on civics and citizenship, addresses a series of broad issues about the way in which Australia is governed. Introductory materials include a synopsis of the six sessions; lists of 51 references, 29 Internet sites, and 13 videos and CDs; glossary; and list of 19 resource materials. Session guides are…

  16. The power of Nutrition Impact and Positive Practice (NIPP) Circles

    African Journals Online (AJOL)

    The Nutrition Impact and Positive Practice (NIPP) circle model was designed to provide alternative, community-based treatment and prevention of moderate acute malnutrition (MAM) to food-aid initiatives, including blanket supplementary feeding programmes (BSFP) and/ or targeted supplementary feeding programmes ...

  17. Optimizing care in osteoporosis: The Canadian quality circle project

    Directory of Open Access Journals (Sweden)

    Kvern Brent

    2008-10-01

    Full Text Available Abstract Background While the Osteoporosis Canada 2002 Canadian guidelines provided evidence based strategies in preventing, diagnosing, and managing this condition, publication and distribution of guidelines have not, in and of themselves, been shown to alter physicians clinical approaches. We hypothesize that primary care physicians enrolled in the Quality Circle project would change their patient management of osteoporosis in terms of awareness of osteoporosis risk factors and bone mineral density testing in accordance with the guidelines. Methods The project consisted of five Quality Circle phases that included: 1 Training & Baseline Data Collection, 2 First Educational Intervention & First Follow-Up Data Collection 3 First Strategy Implementation Session, 4 Final Educational Intervention & Final Follow-up Data Collection, and 5 Final Strategy Implementation Session. A total of 340 circle members formed 34 quality circles and participated in the study. The generalized estimating equations approach was used to model physician awareness of risk factors for osteoporosis and appropriate utilization of bone mineral density testing pre and post educational intervention (first year of the study. Odds ratios (OR and 95% confidence intervals (95% CI were calculated. Results After the 1st year of the study, physicians' certainty of their patients' risk factor status increased. Certainty varied from an OR of 1.4 (95% CI: 1.1, 1.8 for prior vertebral fracture status to 6.3 (95% CI: 2.3, 17.9 for prior hip fracture status. Furthermore, bone mineral density testing increased in high risk as compared with low risk patients (OR: 1.4; 95% CI: 1.2, 1.7. Conclusion Quality Circle methodology was successful in increasing both physicians' awareness of osteoporosis risk factors and appropriate bone mineral density testing in accordance with the 2002 Canadian guidelines.

  18. Can quality circles improve hospital-acquired infection control?

    Science.gov (United States)

    Forster, D H; Krause, G; Gastmeier, P; Ebner, W; Rath, A; Wischnewski, N; Lacour, M; Rüden, H; Daschner, F D

    2000-08-01

    It is a fundamental principle of continuous quality improvement (CQI) that processes should be the objects of quality improvement. The objective of this study was to improve process quality concerning the prevention of hospital-acquired infections in surgical departments and intensive care units by a continuous quality improvement (CQI) approach based mainly on quality circles. This approach was evaluated in a prospective controlled intervention study in medium-size acute care hospitals (four intervention and four control hospitals). During two intervention periods (each 10 months) four external physicians with training in hospital epidemiology and infection control introduced and supervised quality circles in the intervention hospitals. Process quality was assessed by interviewing senior staff members before the first and after the second intervention period using standardized questionnaires. The gold standard process quality was defined on the basis of the CDC/HICPAC-guidelines for the prevention of hospital-acquired infections. Most of the evaluated aspects of process quality belonged to the HICPAC-categories IA and IB respectively, the CDC category I. Fifty quality circle sessions were performed in the four intervention hospitals of which 28 were dealing directly with key subjects in infection control. In the intervention hospitals, 19.8% of evaluated aspects of process quality which concerned the prevention of hospital-acquired infections were improved compared to only 6.9% in the control hospitals (Pquality were initiated by the results of the quality circles. Our study demonstrates that a CQI approach based on infection control quality circles can lead to a substantial improvement of process quality regarding the prevention of hospital-acquired infections.

  19. Circle (CO2 reabsorbing) breathing systems: Human applications.

    Science.gov (United States)

    Magee, Patrick

    2017-07-01

    Artificial breathing systems to help humans survive extreme environments are used over a range of ambient pressures, using various gases of different volumetric concentrations. These activities include anaesthesia and intensive care activity, high-altitude mountaineering, firefighting, aerospace extravehicular space activity and underwater diving operations. A circle breathing system is one in which the exhaled carbon dioxide is absorbed by an alkali substance and the remaining unused gases are recirculated, usually for the sake of economy and environment. This allows the flow of the fresh gas to be considerably reduced, thereby saving on fresh-gas supply. Circle systems are often used in the circumstances cited above, although not always at low fresh-gas flows. The circle system used in anaesthesia and intensive care has the least engineering demands made on it, although it is used on patients who are highly vulnerable; it usually provides a mixture of air and oxygen, and perhaps a breathable anaesthetic gas, all at sea-level pressure. Mountaineering and firefighting applications involve an extreme earthbound environment, with the user undergoing extreme physical work. The astronaut's spacesuit and life support system contains a high-flow circle system, the breathing gases themselves pressurising the suit as well as providing respiratory life support and thermal comfort; the gas provided is pure oxygen at about a third of sea-level atmosphere. There are numerous varieties of breathing systems for diving, including a circle system, often for clandestine naval activity; the gases used are a combination of oxygen, nitrogen and helium, to minimise the possibility of decompression sickness, nitrogen narcosis and oxygen toxicity and must be provided at a varying pressure and concentration appropriate to depth.

  20. The C-Circle Assay for alternative-lengthening-of-telomeres activity.

    Science.gov (United States)

    Henson, Jeremy D; Lau, Loretta M; Koch, Sylvia; Martin La Rotta, Nancy; Dagg, Rebecca A; Reddel, Roger R

    2017-02-01

    The C-Circle Assay has satisfied the need for a rapid, robust and quantitative ALT assay that responds quickly to changes in ALT activity. The C-Circle Assay involves (i) extraction or simple preparation (Quick C-Circle Preparation) of the cell's DNA, which includes C-Circles (ii) amplification of the self-primed C-Circles with a rolling circle amplification reaction and (iii) sequence specific detection of the amplification products by native telomeric DNA dot blot or telomeric qPCR. Here we detail the protocols and considerations required to perform the C-Circle Assay and its controls, which include exonuclease removal of linear telomeric DNA, production of the synthetic C-Circle C96 and modulation of ALT activity by γ-irradiation. Copyright © 2016 Elsevier Inc. All rights reserved.

  1. Variations in maxi-circle and mini-circle sequences in kinetoplast DNAs from different Trypanosoma brucei strains.

    NARCIS (Netherlands)

    P. Borst (Piet); F. Fase-Fowler; J.H.J. Hoeijmakers (Jan); A.C.C. Frasch

    1980-01-01

    textabstractWe have compared a total of 30 recognition sites for eight restriction endonucleases on the 20-kilobase-pair maxi-circle of kinetoplast DNAs from five different Trypanosoma brucei strains. In addition to three polymorphic sites were have found a 5 kilobase-pair region that is not cleaved

  2. Innovation and Organizational Communication in Corporate America: The Rhetorical Visions of Managers, Facilitators, and Employees on Quality Circles.

    Science.gov (United States)

    Eyo, Bassey A.

    1992-01-01

    Examines the dynamics of organizational communication following corporate implementation of quality circles. Describes the rhetorical visions of people at three organizational levels closely associated with quality circles: (1) managers; (2) facilitators who organize the quality circles; and (3) employees. (SR)

  3. Theory of fractional order elements based impedance matching networks

    KAUST Repository

    Radwan, Ahmed G.

    2011-03-01

    Fractional order circuit elements (inductors and capacitors) based impedance matching networks are introduced for the first time. In comparison to the conventional integer based L-type matching networks, fractional matching networks are much simpler and versatile. Any complex load can be matched utilizing a single series fractional element, which generally requires two elements for matching in the conventional approach. It is shown that all the Smith chart circles (resistance and reactance) are actually pairs of completely identical circles. They appear to be single for the conventional integer order case, where the identical circles completely overlap each other. The concept is supported by design equations and impedance matching examples. © 2010 IEEE.

  4. Are Namibian "fairy circles" the consequence of self-organizing spatial vegetation patterning?

    Directory of Open Access Journals (Sweden)

    Michael D Cramer

    Full Text Available Causes of over-dispersed barren "fairy circles" that are often surrounded by ca. 0.5 m tall peripheral grasses in a matrix of shorter (ca. 0.2 m tall grasses in Namibian grasslands remain mysterious. It was hypothesized that the fairy circles are the consequence of self-organizing spatial vegetation patterning arising from resource competition and facilitation. We examined the edaphic properties of fairy circles and variation in fairy circle size, density and landscape occupancy (% land surface with edaphic properties and water availability at a local scale (<50 km and with climate and vegetation characteristics at a regional scale. Soil moisture in the barren fairy circles declines from the center towards the periphery and is inversely correlated with soil organic carbon, possibly indicating that the peripheral grass roots access soil moisture that persists into the dry season within fairy circles. Fairy circle landscape occupancy is negatively correlated with precipitation and soil [N], consistent with fairy circles being the product of resource-competition. Regional fairy circle presence/absence is highly predictable using an empirical model that includes narrow ranges of vegetation biomass, precipitation and temperature seasonality as predictor variables, indicating that fairy circles are likely a climate-dependent emergent phenomenon. This dependence of fairy circle occurrence on climate explains why fairy circles in some locations may appear and disappear over time. Fairy circles are only over-dispersed at high landscape occupancies, indicating that inter-circle competition may determine their spacing. We conclude that fairy circles are likely to be an emergent arid-grassland phenomenon that forms as a consequence of peripheral grass resource-competition and that the consequent barren circle may provide a resource-reservoir essential for the survival of the larger peripheral grasses and provides a habitat for fossicking fauna.

  5. Experiences with Quality Circles in the South-West United States.

    Science.gov (United States)

    Burpeau-DiGregorio, Michele Y.; Dickson, John W.

    1983-01-01

    Reviews the accepted and published features of quality circles; examines the current practices in four organizations in the southwestern United States; interprets the use of quality circles in the context of human relations styles of management; and notes principles associated with successful quality circles. (JOW)

  6. Quality Circle Training for Community College Educators and Students and the Businesses They Serve. Final Report.

    Science.gov (United States)

    McIlwain, Doris W.

    A project sought to extend Central Piedmont Community College's (CPCC) expertise in quality circles. Objectives were to provide low-cost quality circle training for personnel in community colleges and business and industry and to provide instruction in quality circles for college students. Three hundred educators and business people attended…

  7. The Value of the Math Circle for Gifted Middle School Students

    Science.gov (United States)

    Burns, Barbara; Henry, Julie; McCarthy, Dianne; Tripp, Jennifer

    2017-01-01

    Math Circles are designed to allow students to explore mathematics using a problem-solving/inquiry approach. Many of the students attending our Math Circle are mathematically talented and curious. This study examines the perspectives of the students and their families in determining why students attend Math Circle, what they enjoy about Math…

  8. 77 FR 39651 - Proposed Establishment of Class E Airspace; Circle Town, MT

    Science.gov (United States)

    2012-07-05

    ... Class E Airspace; Circle Town, MT AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: This action proposes to establish Class E airspace at Circle Town County Airport, Circle Town, MT, to accommodate aircraft using new Area Navigation (RNAV) Global...

  9. 78 FR 15057 - The Advisors' Inner Circle Fund, et al.; Notice of Application

    Science.gov (United States)

    2013-03-08

    ... From the Federal Register Online via the Government Publishing Office SECURITIES AND EXCHANGE COMMISSION The Advisors' Inner Circle Fund, et al.; Notice of Application March 4, 2013. AGENCY: Securities.... Applicants: The Advisors' Inner Circle Fund (``AIC''), The Advisors' Inner Circle Fund II (``AIC II'') and...

  10. 78 FR 9910 - Circle Environmental #1 and #2 Sites; Dawson, Terrell County, GA; Notice of Settlement

    Science.gov (United States)

    2013-02-12

    ... AGENCY Circle Environmental 1 and 2 Sites; Dawson, Terrell County, GA; Notice of Settlement AGENCY... removal action at the Circle Environmental 1 and 2 Superfund Sites located in Dawson, Terrell County.... Submit your comments by Site name Circle Environmental 1 and 2 Site by one of the following methods: www...

  11. Transaction Circles with Digital Texts as a Foundation for Democratic Practices

    Science.gov (United States)

    Brown, Sally

    2015-01-01

    Transaction circles weave together elements of guided reading and literature circles in an open conversational structure that supports students as agentive learners. Discourse within these circles utilizing digital informational texts assist in the development of democratic practices even in a time when federal mandates limit curricula and…

  12. Expanding the Reach of Extension to Underserved Audiences through Study Circles in Rural Idaho

    Science.gov (United States)

    Cummins, Melissa; Petty, Barbara; Hansen, Lyle; Hoffman, Katie; Wittman, Grace

    2012-01-01

    Extension educators expanded the reach of their programming to underserved audiences through the implementation of Study Circles in rural Southern Idaho. Study Circles gave educators entry into communities by establishing relationships necessary for long-term change. Study Circle discussions in rural Southern Idaho led to stronger relationships…

  13. A reconsideration of the status of English in the Netherlands within the Kachruvian Three Circles model

    NARCIS (Netherlands)

    Gerritsen, M.; Meurs, W.F.J. van; Planken, B.C.; Korzilius, H.P.L.M.

    2016-01-01

    The English used in the Netherlands, a European Union country, is classified by many linguists as an ESL variety, or, within Kachru’s (1985) Three Circles model, as an Outer Circle variety, or as being between an Outer and an Expanding Circle variety. This paper investigates the status of English in

  14. La subjetividad internacional de la Santa Sede

    OpenAIRE

    Mosquera Monelos, Susana

    2014-01-01

    Presentamos el caso de la subjetividad internacional de la Santa Sede como un ejemplo que nos permita afrontar un nuevo enfoque del concepto de sujeto para el derecho internacional. El cumplimiento de los requisitos clásicos de la subjetividad internacional se ha visto superado por la fuerza creadora del derecho que nuevos sujetos internacionales han impulsado: ONG, sociedad civil, transnacionales, sujetos atípicos. Analizando el mecanismo de atribución de personalidad internacional de la San...

  15. Incidental discovery of circle contact lens by MRI: you can't scan my poker face, circle contact lens as a potential MRI hazard.

    Science.gov (United States)

    Tokue, Hiroyuki; Taketomi-Takahashi, Ayako; Tokue, Azusa; Tsushima, Yoshito

    2013-03-25

    Circle contact lenses, also known as color contact lenses and big eye contact lenses, are a type of cosmetic contact lens. It is not generally known that a circle contact lens usually contains iron oxide and other metals, which means their use during magnetic resonance imaging (MRI) is a potential hazard. We present a rare case of incidental discovery of circle contact lenses by MRI and MRI images of circle lenses in vitro. Circle contact lenses usually contain iron oxide, which is a known source of susceptibility artifact on MRI. Not only radiologists and radiographers but also referring physicians should be familiar with the imaging findings and potential risk of scanning circle contact lenses by MRI.

  16. Incidental discovery of circle contact lens by MRI: you can’t scan my poker face, circle contact lens as a potential MRI hazard

    Science.gov (United States)

    2013-01-01

    Background Circle contact lenses, also known as color contact lenses and big eye contact lenses, are a type of cosmetic contact lens. It is not generally known that a circle contact lens usually contains iron oxide and other metals, which means their use during magnetic resonance imaging (MRI) is a potential hazard. Case presentation We present a rare case of incidental discovery of circle contact lenses by MRI and MRI images of circle lenses in vitro. Conclusions Circle contact lenses usually contain iron oxide, which is a known source of susceptibility artifact on MRI. Not only radiologists and radiographers but also referring physicians should be familiar with the imaging findings and potential risk of scanning circle contact lenses by MRI. PMID:23530981

  17. Outer Circle Versus Inner Circle: Special Considerations While Rejuvenating an Indian Face Using Fillers.

    Science.gov (United States)

    Shetty, Rashmi

    2015-01-01

    An oval face, pronounced cheek bones, a defined jaw line and a smooth Ogee curve are global aesthetic beauty goals. Though criteria are similar the Indian face poses some unique challenges because of the innate differences in skeletal shape, size, and soft tissue disposition. Width of the malar prominences and mandibular angles along with height are smaller compared to the other Asian and Caucasian populations along with a much heavier soft tissue disposition. This creates unique deficits and places unique demands on aesthetic intervention. The evolution of practice patterns has lead to a variety of newer approaches; however, it is still common to target the nasolabial and mid-face volumizing as basic intervention for facial beautifying and rejuvenation. As aging progresses, Indian faces tend to get fuller and the tissue then descends downwards similar to other ethnic groups albeit more aggressive due to higher volumes of facial fat pad and smaller bone framework. Any excess correction in the inner circle zones will further add to the bulk along with cumulative remnants of previously administered fillers. In a younger face when the goal is beautification the attempt is to address the specific structural deficit on the outer bony framework along with the chin. This enhances the appearance immediately as well as holds up the tissue descent as they age. When the goal is youthful transition of an aging face, then again the bony changes further enhance the deficit in framework and the loss of fat pads along the periphery that is lateral forehead, temples and lateral cheek. Fat pad correction will give the most natural and best results as against working on the anterior mid cheek, nasolabials and angle of the mouth in a soft tissue heavy center zone of the face. Botulinum toxin and hyaluronic acid (HA) fillers remain the most popular facial injectables used for facial rejuvenation and structural enhancement. Naturally enhanced faces, and gracefully addressed aging

  18. Outer circle versus inner circle: Special considerations while rejuvenating an Indian face using fillers

    Directory of Open Access Journals (Sweden)

    Rashmi Shetty

    2015-01-01

    Full Text Available Introduction: An oval face, pronounced cheek bones, a defined jaw line and a smooth Ogee curve are global aesthetic beauty goals. Though criteria are similar the Indian face poses some unique challenges because of the innate differences in skeletal shape, size, and soft tissue disposition. Width of the malar prominences and mandibular angles along with height are smaller compared to the other Asian and Caucasian populations along with a much heavier soft tissue disposition. This creates unique deficits and places unique demands on aesthetic intervention. Objectives: The evolution of practice patterns has lead to a variety of newer approaches; however, it is still common to target the nasolabial and mid-face volumizing as basic intervention for facial beautifying and rejuvenation. As aging progresses, Indian faces tend to get fuller and the tissue then descends downwards similar to other ethnic groups albeit more aggressive due to higher volumes of facial fat pad and smaller bone framework. Any excess correction in the inner circle zones will further add to the bulk along with cumulative remnants of previously administered fillers. Methods: In a younger face when the goal is beautification the attempt is to address the specific structural deficit on the outer bony framework along with the chin. This enhances the appearance immediately as well as holds up the tissue descent as they age. When the goal is youthful transition of an aging face, then again the bony changes further enhance the deficit in framework and the loss of fat pads along the periphery that is lateral forehead, temples and lateral cheek. Fat pad correction will give the most natural and best results as against working on the anterior mid cheek, nasolabials and angle of the mouth in a soft tissue heavy center zone of the face. Botulinum toxin and hyaluronic acid (HA fillers remain the most popular facial injectables used for facial rejuvenation and structural enhancement. Results

  19. Rolling circle amplification of complete nematode mitochondrial genomes.

    Science.gov (United States)

    Tang, Sha; Hyman, Bradley C

    2005-06-01

    To enable investigation of nematode mitochondrial DNA evolution, methodology has been developed to amplify intact nematode mitochondrial genomes in preparative yields using a rolling circle replication strategy. Successful reactions were generated from whole cell template DNA prepared by alkaline lysis of the rhabditid nematode Caenorhabditis elegans and a mermithid nematode, Thaumamermis cosgrovei. These taxa, representing the two major nematode classes Chromodorea and Enoplea, maintain mitochondrial genomes of 13.8 kb and 20.0 kb, respectively. Efficient amplifications were conducted on template DNA isolated from individual or pooled nematodes that were alive or stored at -80 degrees C. Unexpectedly, these experiments revealed that multiple T. cosgrovei mitochondrial DNA haplotypes are maintained in our local population. Rolling circle amplification products can be used as templates for standard PCR reactions with specific primers that target mitochondrial genes or for direct DNA sequencing.

  20. Spectrum of sight line displacements in the axial meridian circle.

    Science.gov (United States)

    Bakhonskij, A. V.; Kostyuchenko, V. L.; Lazorenko, P. F.

    The authors analyze the residuals Δα cos δ and Δδ obtained in the reduction of star observations made with the axial meridian circle of the Main Astronomical Observatory, National Academy of Sciences of Ukraine. The mean autocorrelation functions, variances, and spectra are given. The averaging allowed for the bias of sample functions for finite measurement runs. The spectra expressed in [open square]″Hz are fitted by the two-component models g(f) = 563(T0f)-2.2+7.0 and g(f) = 242(T0f)-1.5+5.1 for right ascension and declination residuals, respectively, with T0 = 18000 s. The data are compared with those for the Bordeaux meridian circle of the classical type. The spectral low-frequency component is shown to be produced by thermal deformations of the instrument tube.

  1. The black-and-white coloring problem on circle graphs

    CERN Document Server

    Kloks, Ton; Wang, Yue-Li

    2012-01-01

    Given a graph G and integers b and w. The black-and-white coloring problem asks if there exist disjoint sets of vertices B and W with |B|=b and |W|=w such that no two vertices x in B and y in W are adjacent. In this paper we show that the problem is polynomial when restricted to permutation graphs and, more generally, to circle graphs.

  2. BANQUET SPEECH Full Circle: Star Ferry to Stardust

    Science.gov (United States)

    Matthews, Clifford N.

    2008-10-01

    Good evening. I'd like to invite you to join me on a journey that could be entitled “Full Circle: Star Ferry to Stardust”. “Star Ferry” represents Hong Kong, my home town, and especially its university - Hong Kong University - as I knew it during the years of World War II. “Stardust” refers to our gathering here to report on our research on possible organic chemistry in space.

  3. Rolling circle amplification detection of RNA and DNA

    Science.gov (United States)

    Christian, Allen T.; Pattee, Melissa S.; Attix, Cristina M.; Tucker, James D.

    2004-08-31

    Rolling circle amplification (RCA) has been useful for detecting point mutations in isolated nucleic acids, but its application in cytological preparations has been problematic. By pretreating cells with a combination of restriction enzymes and exonucleases, we demonstrate RCA in solution and in situ to detect gene copy number and single base mutations. It can also detect and quantify transcribed RNA in individual cells, making it a versatile tool for cell-based assays.

  4. On the position uncertainty measure on the circle

    Energy Technology Data Exchange (ETDEWEB)

    Trifonov, D A [Institute for Nuclear Research, 72 Tzarigradsko Chaussee, 1784 Sofia (Bulgaria)

    2003-11-28

    New position uncertainty (delocalization) measures for a particle on the circle are proposed and illustrated in several examples, where the previous measures (based on 2{pi}-periodic position operators) appear to be unsatisfactory. The new measures are suitably constructed using the standard multiplication angle operator variances. They are shown to depend solely on the state of the particle and to obey uncertainty relations of the Schroedinger-Robertson type.

  5. Circles of support and accountability: the characteristics of core members in England and Wales

    OpenAIRE

    Clarke, Martin; Warwick, Leah; Völlm, Birgit

    2016-01-01

    Background\\ud Circles of support and accountability, or Circles, use community volunteers to help reintegrate sex offenders at risk of reoffending in the community.\\ud \\ud Aims\\ud The aims of this study are to describe the first 275 male sex offenders (‘core members’) in England and Wales supported by a Circle and to compare those attending the five largest Circles.\\ud \\ud Methods\\ud As part of their monitoring activity, 10 Circles extracted data from case files, anonymised it and submitted i...

  6. Comparison between SVPWM two level in internal and external circle of hexagon

    Science.gov (United States)

    Giyantara, Andhika; Rameli, Mochammad

    2017-01-01

    This study presents a space vector pulse width modulation (SVPWM) method. Switching time for SVPWM two level is used to generate a sinusoidal waveform from the inverter. This waveform using as input for the induction motor. Usually, we use the internal circle to generate sinusoidal method. However, from the calculation, we can get two different equations, for the internal circle in hexagon and external circle for the hexagon. Comparison between voltage vector in the internal and external circle of hexagon using THD (Total Harmonic Distortion) value for each circle.

  7. [Data supporting quality circle management of inpatient depression treatment].

    Science.gov (United States)

    Brand, S; Härter, M; Sitta, P; van Calker, D; Menke, R; Heindl, A; Herold, K; Kudling, R; Luckhaus, C; Rupprecht, U; Sanner, Dirk; Schmitz, D; Schramm, E; Berger, M; Gaebel, W; Schneider, F

    2005-07-01

    Several quality assurance initiatives in health care have been undertaken during the past years. The next step consists of systematically combining single initiatives in order to built up a strategic quality management. In a German multicenter study, the quality of inpatient depression treatment was measured in ten psychiatric hospitals. Half of the hospitals received comparative feedback on their individual results in comparison to the other hospitals (bench marking). Those bench markings were used by each hospital as a statistic basis for in-house quality work, to improve the quality of depression treatment. According to hospital differences concerning procedure and outcome, different goals were chosen. There were also differences with respect to structural characteristics, strategies, and outcome. The feedback from participants about data-based quality circles in general and the availability of bench-marking data was positive. The necessity of carefully choosing quality circle members and professional moderation became obvious. Data-based quality circles including bench-marking have proven to be useful for quality management in inpatient depression care.

  8. Fucus extract: cosmetic treatment for under-eye dark circles.

    Science.gov (United States)

    Chavan, Manasi; Sun, Yuhua; Litchauer, Jill; Denis, Alain

    2014-01-01

    Dark circles around the eyes are a complex issue with two main possible causes, the accumulation of melanin in the skin around the eyes and the accumulation of heme resulting from blood leakage. The free heme produced in this manner is highly cytotoxic, proinflammatory and pro-oxidative. To evaluate the effect of Fucus extract on heme oxygenase-1 (HO-1) stimulation activity, and to study its in vitro anti-inflammatory, antioxidative, and collagen stimulation activity. The HO-1 stimulation activity was first evaluated at gene level by reverse transcriptase- polymerase chain reaction targeting specific HO-1 gene, and then followed by Western blot in protein level. The in vitro anti-inflammatory effect was measured by quantification of interleukin-8 (IL-8) level. The in vitro antioxidative activity was measured. Collagen stimulation activity was quantitatively measured by the amount of deposited collagen I in the extracellular matrix. Fucus extract was identified to have HO-1 stimulation activity at both gene and protein level. By stimulating this enzyme, it promotes the degradation of toxic heme to its protective catabolites (CO, Ferritin, and bilirubin) and reduces the source of dark circles. In addition, Fucus extract showed good anti-inflammatory efficacy. The strong antioxidation property of Fucus extract can reduce eye bags and wrinkles while its collagen boosting activity will potentially reduce fine lines and wrinkles. Fucus extract is a novel product that brings a quadruple approach to the treatment of under-eye dark circles.

  9. Recruitment Pattern in a Complete Cerebral Arterial Circle.

    Science.gov (United States)

    de Lancea, Christine L; David, Tim; Alastruey, Jordi; Brown, Richard G

    2015-11-01

    Blood flow through a vessel depends upon compliance and resistance. Resistance changes dynamically due to vasoconstriction and vasodilation as a result of metabolic activity, thus allowing for more or less flow to a particular area. The structure responsible for directing blood to the different areas of the brain and supplying the increase flow is the cerebral arterial circle (CAC). A series of 1D equations were utilized to model propagating flow and pressure waves from the left ventricle of the heart to the CAC. The focus of the current research was to understand the collateral capability of the circle. This was done by decreasing the peripheral resistance in each of the efferent arteries, up to 10% both unilaterally and bilaterally. The collateral patterns were then analyzed. After the initial 60 simulations, it became apparent that flow could increase beyond the scope of a 10% reduction and still be within in vivo conditions. Simulations with higher percentage decreases were performed such that the same amount of flow increase would be induced through each of the efferent arteries separately, same flow tests (SFTs), as well as those that were found to allow for the maximum flow increase through the stimulated artery, maximum flow tests (MFTs). The collateral pattern depended upon which efferent artery was stimulation and if the stimulation was unilaterally or bilaterally induced. With the same amount of flow increase through each of the efferent arteries, the MCAs (middle cerebral arteries) had the largest impact on the collateral capability of the circle, both unilaterally and bilaterally.

  10. Host RNA circles and the origin of hepatitis delta virus.

    Science.gov (United States)

    Taylor, John M

    2014-03-21

    Recent reports show that many cellular RNAs are processed to form circular species that are relatively abundant and resistant to host nucleases. In some cases, such circles actually bind host microRNAs. Such depletion of available microRNAs appears to have biological roles; for instance, in homeostasis and disease. These findings regarding host RNA circles support a speculative reappraisal of the origin and mode of replication of hepatitis delta virus, hepatitis delta virus (HDV), an agent with a small circular RNA genome; specifically, it is proposed that in hepatocytes infected with hepatitis B virus (HBV), some viral RNA species are processed to circular forms, which by a series of chance events lead to an RNA that can be both replicated by host enzymes and assembled, using HBV envelope proteins, to form particles some of which are infectious. Such a model also may provide some new insights into the potential pathogenic potential of HDV infections. In return, new insights into HDV might provide information leading to a better understanding of the roles of the host RNA circles.

  11. Circles of support and accountability: The characteristics of core members in England and Wales.

    Science.gov (United States)

    Clarke, Martin; Warwick, Leah; Völlm, Birgit

    2017-04-01

    Circles of support and accountability, or Circles, use community volunteers to help reintegrate sex offenders at risk of reoffending in the community. The aims of this study are to describe the first 275 male sex offenders ('core members') in England and Wales supported by a Circle and to compare those attending the five largest Circles. As part of their monitoring activity, 10 Circles extracted data from case files, anonymised it and submitted it to Circles UK, the national oversight body. Circles have expanded rapidly with 165 (60%) of Circles commencing in the three years 2011-2013 compared with 110 in the nine years 2002-2010. Most core members were referred from the Probation Service (82%). Circles were provided to men with a range of predicted risks of reoffending - from low (26%) to very high (12%). There were some positive changes between the beginning and end of Circles, such as fewer men being unemployed and more living in their own chosen accommodation. Circles have been used to support the reintegration of a wide range of sex offenders. Given their rapid growth and flexibility, consistent recording standards are required across. These standards should be reviewed periodically to ensure all important fields of change are captured, including frequency of attendance, length per session and quality of engagement in the work. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.

  12. Reconnaissance Report for Navigation Improvements (Reduction of Shoaling) at Santa Cruz Harbor Santa Cruz County, California

    Science.gov (United States)

    1992-05-01

    Central California Coast. Ghost Town Publications, Canmel CA 93921. Rickets , Edward F., Jack Calvin & Joel W. Hedgepeth. 1985. Between Pacific Tides...banning of DDT, birds have begun to return in force. The brown pelican now breeds in waters of southern California and Mexico and migrate into the Santa

  13. Mixteco de Santa Maria Penoles, Oaxaca (Mixtec of Santa Maria Penoles, Oaxaca).

    Science.gov (United States)

    Mexico Coll. (Mexico City)

    This document is one of 17 volumes on indigenous Mexican languages and is the result of a project undertaken Archivo de Lenguas Indigenas de Mexico. This volume contains information on Mixtec, an indigenous language of Mexico spoken in Santa Maria Penoles in the state of Oaxaca. The objective of collecting such a representative sampling of the…

  14. Chocho de Santa Catarina Ocotlan, Oaxaca (Chocho of Santa Catarina Ocotlan, Oaxaca).

    Science.gov (United States)

    Mexico Coll. (Mexico City)

    This document is one of 17 volumes on indigenous Mexican languages and is the result of a project undertaken by the Archivo de Lenguas Indigenas de Mexico. This volume contains information on Chocho, an indigenous language of Mexico spoken in Santa Catarina Ocotlan, in the state of Oaxaca. The objective of collecting such a representative sampling…

  15. Can the Expanding Circle Own English? Comments on Yoo's "Nonnative Teachers in the Expanding Circle and the Ownership of English"

    Science.gov (United States)

    Ren, Wei

    2014-01-01

    Yoo's (2014) article raises a number of questions concerning local teachers' status and the ownership of English in the Expanding Circle. In this article, I address five issues that I see as most important relating to the ownership of English and empowering local teachers in the Expanding Circle. I provide up-to-date evidence of World…

  16. PRECENCIA DE LOS NEGROS EN SANTA MARTA

    Directory of Open Access Journals (Sweden)

    Edgar Rey Sinning

    2002-08-01

    Full Text Available Partimos de señalar que las investigaciones sobre los negros en la Provincia de Santa Marta, son escasas; sin embargo, podemos afirmar que dos trabajos dan cuenta de su presencia en la ciudad y en todo su territorio. El primero, de ellos es la reciente publicación sobre la esclavitud entre los años 1791- 1851, de Dolcey Romero Jaramillo que revisa el papel de los negros en dicha provincia y ciudad. El otro es nuestro estudio sobre 10s negros llegados a Santa Marta desde el Departamento de Bolívar, en la década de los 80 del siglo pasado, titulado "Cristo Rey: Un Espacio para permanecer en el Tiempo". El presente artículo elabora una cronología de la presencia de los negros esclavos que llegaron a Santa Marta desde 1525, año de su fundación. Se señala cómo durante los primeros años se fueron autorizando dos (2 esclavos negros para algunas personas importantes, destinados a1 servicio doméstico. Política que se comienza a modificar a partir de 1535, cuando se le autorizan cien (100 esclavos al Gobernador Pedro Fernández de Lugo, y desde entonces, es importante su presencia en oficios varios, sobre todo en las actividades de las haciendas cercanas a Santa Marta, hasta el siglo XIX. A finales de ese siglo y comienzos del XX, es significativa su vinculación a] muelle -más tarde puerto-, como "muelleros" o "portuarios", asumiendo la responsabilidad de garantizar las actividades de carga y descarga del puerto samario. Igualmente se muestra su papel determinante en la construcción de las líneas férreas que unirían a la ciudad-puerto con la "Zona Bananera". Es para esta última actividad, que se traen negros desde Jamaica conocidos como "yumecas", llamados "yumecas" por los samarios.

  17. Mujeres Latinas--Santas y Marquesas.

    Science.gov (United States)

    Arredondo, Patricia

    2002-11-01

    This presidential address is a conceptualization and application of psychohistorical and mestizo psychology frameworks to address gender and ethnic identity conflicts for contemporary Latinas. Connections are made between historical and cultural icons and Latina literature of the 21st century with protagonists who give voice to the struggles of acculturated and self-empowered women. Spanish terms are used to communicate and give emphasis to the Latino landscape. The article comes to conclusion with personal reflections about María Morales de Zaldívar, or Mamá, the author's grandmother, who embodies the santa y marquesa life script.

  18. Un ensayo de Elisa Mujica: Santa Teresa

    Directory of Open Access Journals (Sweden)

    Elisa Mújica

    1980-06-01

    Full Text Available Santa Teresa de Avila empezó a escribir El Castillo Interior o Las Moradas el 2 de junio de 1577. Lo terminó el 29 de noviembre del mismo año, o sea poco menos de seis meses más tarde. El increíble plazo todavía se acorta por la interrupción de varias semanas a consecuencia de un viaje de Toledo a Avila, efectuado por la autora. Entonces tocaba a su fin la lucha para implantar la Reforma carmelita, entre intrigas, críticas e incomprensiones de toda clase.

  19. Geologic Map of the Santa Barbara Coastal Plain Area, Santa Barbara County, California

    Science.gov (United States)

    Minor, Scott A.; Kellogg, Karl S.; Stanley, Richard G.; Gurrola, Larry D.; Keller, Edward A.; Brandt, Theodore R.

    2009-01-01

    This report presents a newly revised and expanded digital geologic map of the Santa Barbara coastal plain area at a compilation scale of 1:24,000 (one inch on the map to 2,000 feet on the ground)1 and with a horizontal positional accuracy of at least 20 m. The map depicts the distribution of bedrock units and surficial deposits and associated deformation underlying and adjacent to the coastal plain within the contiguous Dos Pueblos Canyon, Goleta, Santa Barbara, and Carpinteria 7.5' quadrangles. The new map supersedes an earlier preliminary geologic map of the central part of the coastal plain (Minor and others, 2002; revised 2006) that provided coastal coverage only within the Goleta and Santa Barbara quadrangles. In addition to new mapping to the west and east, geologic mapping in parts of the central map area has been significantly revised from the preliminary map compilation - especially north of downtown Santa Barbara in the Mission Ridge area - based on new structural interpretations supplemented by new biostratigraphic data. All surficial and bedrock map units, including several new units recognized in the areas of expanded mapping, are described in detail in the accompanying pamphlet. Abundant new biostratigraphic and biochronologic data based on microfossil identifications are presented in expanded unit descriptions of the marine Neogene Monterey and Sisquoc Formations. Site-specific fault kinematic observations embedded in the digital map database are more complete owing to the addition of slip-sense determinations. Finally, the pamphlet accompanying the present report includes an expanded and refined summary of stratigraphic and structural observations and interpretations that are based on the composite geologic data contained in the new map compilation. The Santa Barbara coastal plain is located in the western Transverse Ranges physiographic province along an east-west-trending segment of the southern California coastline about 100 km (62 mi) northwest

  20. Voice of the voiceless: The legacy of the Circle of Concerned African Women Theologians

    Directory of Open Access Journals (Sweden)

    Hazel O. Ayanga

    2016-07-01

    Full Text Available The Circle of Concerned African Women Theologians (the Circle formally came into existence in 1989 in Accra, Ghana. Under the charismatic leadership of Mercy Amba Oduyoye, the Circle sought to be the voice of African Christian women at the grass roots level. To this end research and publication was and still is one of the major pillars and activities of the Circle. The main objective of the Circle is �to write and publish theological literature written by African women from their own experience of religion and culture on this continent�. In this regard the Circle has been and continues to be the voice for and on behalf of the African woman in religion, culture and theology. However, 25 years down the line there is need for an evaluation of the legacy of the Circle. How has the Circle been a voice for the voiceless, a mentoring instrument for women venturing into the academia? This article seeks to do this evaluation by examining the activities of the Circle including research publication.Intradisciplinary and/or interdisciplinary implications: This article seeks to evaluate the achievements of the Circle of Concerned African Women Theologians in relation to the Circle�s stated objectives. The article picks up the notion of the Circle theologians as the voice of the voiceless women of Africa. The general approach of the article brings together discussions on social issues like gender, poverty and marginalisation as well as language. Theological and religious perspectives on these issues are understood from a Circle point of view.Keywords: women; voice; voicelessness; poverty; gender; The Circle; theology

  1. "Santa Maria" forever : Eesti ja Portugali kirjandussuhetest / Toomas Haug

    Index Scriptorium Estoniae

    Haug, Toomas, 1956-

    2012-01-01

    Jaanuaris 1961 Portugali diktaatorlikule režiimile protestiks kaaperdatud laevast "Santa Maria", mis sai omamoodi vabaduse ja vastuhaku sümboliks ka okupeeritud Eestis. Artiklis käsitletakse sellest sündmusest mõjutatud teoseid, täpsemalt Aleksander Suumanni maali "Santa Maria" ja Paul-Eerik Rummo samanimelist luuletust

  2. 27 CFR 9.126 - Santa Clara Valley.

    Science.gov (United States)

    2010-04-01

    ...), photoinspected 1973; (8) Loma Prieta, Calif., 1955 (photorevised 1968); (9) Los Gatos, Calif., 1953 (photorevised... boundary) approx. 7 miles until it converges with Los Trancos Creek (Santa Clara County/San Mateo County... along Los Trancos Creek (Santa Clara County/San Mateo County boundary) until it intersects the 600 foot...

  3. 27 CFR 9.31 - Santa Cruz Mountains.

    Science.gov (United States)

    2010-04-01

    ..., California—San Mateo County”; (9) “La Honda Quadrangle, California—San Mateo County”; (10) “Laurel Quadrangle..., California—San Mateo County”; (18) “San Mateo Quadrangle, California—San Mateo County”; (19) “Santa Teresa... Quadrangle, California—San Mateo County”; and (24) One 5 × 11 minute series map entitled: “Santa Cruz...

  4. "Santa Maria" forever : Eesti ja Portugali kirjandussuhetest / Toomas Haug

    Index Scriptorium Estoniae

    Haug, Toomas, 1956-

    2015-01-01

    Jaanuaris 1961 Portugali diktaatorlikule režiimile protestiks kaaperdatud laevast "Santa Maria", mis sai omamoodi vabaduse ja vastuhaku sümboliks ka okupeeritud Eestis. Artiklis käsitletakse sellest sündmusest mõjutatud teoseid, täpsemalt Aleksander Suumanni maali "Santa Maria" ja Paul-Eerik Rummo samanimelist luuletust

  5. Physical, mechanical and chemical properties of plums (cv. Santa ...

    African Journals Online (AJOL)

    The effect of AVG (Aminoethoxyvinylglycine) treatments on some physical, mechanical and chemical properties of plum fruits (cv. Santa Rosa) were determined. Materials and Methods: For this research, the plant material 'Santa Rosa' plum (Prunus salicina L.) fruits were obtained in Tokat/Turkey (39o51' N and 40o55' E), ...

  6. 46 CFR 7.115 - Santa Catalina Island, CA.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Santa Catalina Island, CA. 7.115 Section 7.115 Shipping... Coast § 7.115 Santa Catalina Island, CA. (a) A line drawn from the northernmost point of Lion Head to the north tangent of Bird Rock Island; thence to the northernmost point of Blue Cavern Point. (b) A...

  7. Free inside: The Music Class at Santa Ana Jail

    Science.gov (United States)

    Fierro, Joe

    2010-01-01

    This article examines the workings of the music class at the Santa Ana Jail in Santa Ana, California. It gives us insight into a jail system and a music class focused on helping inmates position themselves to become productive members of society. In this article I examine how the facility encourages inmates' good behaviour and why the music class…

  8. Deteksi Iris Berdasarkan Metode Black Hole dan Circle Curve Fitting

    Directory of Open Access Journals (Sweden)

    Danny Kurnianto

    2013-11-01

    Full Text Available Sistem pengenalan identitas personal berdasarkan ciri biometrika adalah suatu sistem pengenalan seseorang berdasarkan pada ciri biometrika yang melekat pada orang tersebut. Iris mata merupakan salah satu ciri biometrik yang handal untuk sistem pengenalan identitas personal. Bagian sistem pengenalan identitas personal berdasarkan biometrik iris yang dianggap paling krusial adalah deteksi lokasi iris, karena akurasi deteksi iris berpengaruh pada tingkat akurasi sistem secara keseluruhan. Lokasi iris pada citra mata dibatasi oleh dua buah lingkaran yang memisahkan antara bagian iris  dengan pupil dan sklera. Telah banyak metodemetode yang diusulkan oleh para peneliti untuk menghasilkan deteksi lokasi iris dengan akurat dan cepat. Masalah akurasi, kecepatan waktu eksekusi dan ketahanan terhadap noise merupakan bidang penelitian yang menantang pada deteksi iris. Makalah ini menyajikan metode deteksi iris menggunakan metode black hole dan circle curve fitting. Langkah pertama, mencari batas dalam lingkaran iris yang memisahkan antara daerah iris dan pupil. Dengan metode black hole yang bekerja berdasarkan fakta bahwa lokasi pupil merupakan daerah  lingkaran yang paling hitam dan memiliki distribusi nilai intensitas yang seragam, maka lokasi pupil dapat ditentukan dengan teknik pengambangan. Batas lingkaran pupil dapat ditentukan dengan circle curve fitting dari parameter lingkaran daerah pupil. Langkah kedua,  mencari batas luar lingkaran iris yang memisahkan antara iris dan sklera. Peta tepi citra iris dicari dengan menggunakan deteksi tepi Canny, kemudian diambil satu komponen tepi arah vertikal yang dapat mewakili batas lingkaran luar iris. Dari komponen tepi tersebut, dihitung jari-jari iris yang berpusat di pusat pupil. Dengan jari-jari iris dan pusat iris maka dapat ditentukan batas luar iris menggunakan circle curve fitting

  9. Heavy rainfall equations for Santa Catarina, Brazil

    Directory of Open Access Journals (Sweden)

    Álvaro José Back

    2011-12-01

    Full Text Available Knowledge of intensity-duration-frequency (IDF relationships of rainfall events is extremely important to determine the dimensions of surface drainage structures and soil erosion control. The purpose of this study was to obtain IDF equations of 13 rain gauge stations in the state of Santa Catarina in Brazil: Chapecó, Urussanga, Campos Novos, Florianópolis, Lages, Caçador, Itajaí, Itá, Ponte Serrada, Porto União, Videira, Laguna and São Joaquim. The daily rainfall data charts of each station were digitized and then the annual maximum rainfall series were determined for durations ranging from 5 to 1440 min. Based on these, with the Gumbel-Chow distribution, the maximum rainfall was estimated for durations ranging from 5 min to 24 h, considering return periods of 2, 5, 10, 20, 25, 50, and 100 years,. Data agreement with the Gumbel-Chow model was verified by the Kolmogorov-Smirnov test, at 5 % significance level. For each rain gauge station, two IDF equations of rainfall events were adjusted, one for durations from 5 to 120 min and the other from 120 to 1440 min. The results show a high variability in maximum intensity of rainfall events among the studied stations. Highest values of coefficients of variation in the annual maximum series of rainfall were observed for durations of over 600 min at the stations of the coastal region of Santa Catarina.

  10. Quality control circles in the Veterans Administration hospital.

    Science.gov (United States)

    Canel, Cem; Kadipasaoglu, Sukran

    2002-01-01

    In response to residents' reports of inefficiencies in the Veterans Administration (VA) system, a temporary task force of quality control circles was implemented at a VA hospital. A total of 25 internal medicine residents, on rotation at the VA, were subdivided into four groups. Each group was presented with a different problem, given the components and constraints of the problem, and asked to identify possible solutions. Program results were submitted to the hospital administration. Efforts are now being made to improve the working environment for medical residents.

  11. [Gambling addiction: the psychopathological structure of game-circle].

    Science.gov (United States)

    Malygin, V L; Chugaevskaia, E V; Khvostikov, G S

    2010-01-01

    Thirty-two pathological gamblers were examined. The SCL-90-R, the LSI (Life Style Index) and the CSW questionnaires were used to evaluate psychopathological disorders. Based on the data obtained and the analysis of the development of pathological behavior, authors singled out 6 periods of the game-circle: 1) distress that directly followed the game (anxiety-depressive, obsessive-compulsive and paranoia disorders); 2) moderate anxiety-depressive disorders; 3) subdepressive disorders with predominance of asthenia and apathy; 4) anxiety and dysphoria comorbid with subdepression; 5) the narrow state of consciousness (game trans) preceding the relapse; 6) the return to game.

  12. The dot-in-circle sign of mycetoma on MRI.

    Science.gov (United States)

    Kumar, Jyoti; Kumar, Atin; Sethy, Pradeep; Gupta, Somesh

    2007-12-01

    Mycetoma is a chronic granulomatous disease prevalent in tropical countries, but it also occurs in Europe and the United States. Early diagnosis is important as it has therapeutic implications. Although biopsy and microbiological culture provide the definitive diagnosis, these are difficult to achieve in many instances. The dot-in-circle sign is a recently proposed magnetic resonance imaging (MRI) sign of mycetoma, which is likely to be highly specific. We present a case of mycetoma of the thigh with characteristic MRI features. To the best of our knowledge, only 2 cases of mycetoma of the foot demonstrating this sign have been previously published.

  13. The Function of Love in Solzhenitsyn's The First Circle

    Directory of Open Access Journals (Sweden)

    John Schillinger

    1977-01-01

    Full Text Available Aleksander Solzhenitsyn, like Boris Pasternak before him, insists upon the primacy of life over any socio-political system. To lead truly meaningful lives, his characters must comprehend that they are responsible for their own actions; that they are engaged in an existential struggle which pits individual freedom against the will of authority. In The First Circle , this struggle is clearly reflected in the theme of love which, when analyzed in terms of the suppression or triumph of its four basic elements ( sex, eros, philia, and agape , offers a convincing allegory of man's existential self-definition by free choice.

  14. Circle Kabaddi: juego tradicional y deporte espectáculo

    OpenAIRE

    Césaro, Aldo Román

    2015-01-01

    El siguiente artículo tiene como principal objetivo presentar y analizar un juego/deporte de persecución y lucha denominado “Circle Kabaddi”. En este sentido, se relatan, explican e interpretan los detalles de esta práctica lúdico deportiva a partir de relatos y observaciones realizadas como jugador/luchador en cuatro mundiales de la especialidad (2011; 2012; 2013; 2014) realizados en el estado de Punjab, India. Entre párrafos se agregan observaciones relevantes que amplían o ejemplifican cir...

  15. Orthogonal polynomials on the unit circle part 2 spectral theory

    CERN Document Server

    Simon, Barry

    2013-01-01

    This two-part book is a comprehensive overview of the theory of probability measures on the unit circle, viewed especially in terms of the orthogonal polynomials defined by those measures. A major theme involves the connections between the Verblunsky coefficients (the coefficients of the recurrence equation for the orthogonal polynomials) and the measures, an analog of the spectral theory of one-dimensional Schrödinger operators. Among the topics discussed along the way are the asymptotics of Toeplitz determinants (Szegő's theorems), limit theorems for the density of the zeros of orthogonal po

  16. Orthogonal polynomials on the unit circle part 1 classical theory

    CERN Document Server

    2009-01-01

    This two-part book is a comprehensive overview of the theory of probability measures on the unit circle, viewed especially in terms of the orthogonal polynomials defined by those measures. A major theme involves the connections between the Verblunsky coefficients (the coefficients of the recurrence equation for the orthogonal polynomials) and the measures, an analog of the spectral theory of one-dimensional Schrodinger operators. Among the topics discussed along the way are the asymptotics of Toeplitz determinants (Szegő's theorems), limit theorems for the density of the zeros of orthogonal po

  17. Adaptive Networks: the Governance for Sustainable Development

    NARCIS (Netherlands)

    S.G. Nooteboom (Sibout)

    2006-01-01

    textabstractIn this book, I reconstruct how policy makers, working together in what I term adaptive networks, have enabled a breakthrough in thinking about sustainable mobility in certain policy circles. I define the conduct of leading actors in these adaptive networks as sustainable change

  18. Social Networks and Mourning: A Comparative Approach.

    Science.gov (United States)

    Rubin, Nissan

    1990-01-01

    Suggests using social network theory to explain varieties of mourning behavior in different societies. Compares participation in funeral ceremonies of members of different social circles in American society and Israeli kibbutz. Concludes that results demonstrated validity of concepts deriving from social network analysis in study of bereavement,…

  19. SPECTRA OF MOTHERS OF PREMATURE CHILDREN ABOUT THE EDUCATIVE CIRCLE OF CULTURE

    Directory of Open Access Journals (Sweden)

    Camila Santos do Couto

    2014-12-01

    Full Text Available Abstract We sought to know the spectra of mothers of premature children regarding their experience with circle of culture of educational character and identifying the learning provided by the circle of culture about newborn care after hospital discharge. A descriptive study was performed in a hospital located in Fortaleza, Brazil. Three meetings of a circle of culture with 17 mothers of premature newborns were performed. The interpretation of the corpus was performed using thematic analysis. Emerged from the categories: Maternal experience in a circle of culture; Promoted social support among mothers through the circle of culture; and Learning provided by the circle of culture. It was concluded that teaching parents during the hospitalization of the child should be held in a way to involve parents in the care of the newborn, provide moments of health education, opportunities for support and dialogue between professionals and family.

  20. Spectra of mothers of premature children about the educative circle of culture.

    Science.gov (United States)

    Couto, Camila Santos do; Tupinambá, Milena Colares; Rangel, Aldecira Uchôa Monteiro; Frota, Mirna Albuquerque; Martins, Elis Mayre da Costa Silveira; Nobre, Caroline Soares; Landim, Átima Luna Pinheiro

    2014-12-01

    We sought to know the spectra of mothers of premature children regarding their experience with circle of culture of educational character and identifying the learning provided by the circle of culture about newborn care after hospital discharge. A descriptive study was performed in a hospital located in Fortaleza, Brazil. Three meetings of a circle of culture with 17 mothers of premature newborns were performed. The interpretation of the corpus was performed using thematic analysis. Emerged from the categories: Maternal experience in a circle of culture; Promoted social support among mothers through the circle of culture; and Learning provided by the circle of culture. It was concluded that teaching parents during the hospitalization of the child should be held in a way to involve parents in the care of the newborn, provide moments of health education, opportunities for support and dialogue between professionals and family.

  1. Perceived effectiveness of diagnostic and therapeutic guidelines in primary care quality circles.

    Science.gov (United States)

    Tausch, B D; Härter, M C

    2001-06-01

    The main objectives of this study were to implement quality circle programs among general practitioners and to evaluate this quality management tool as a way to develop clinical guidelines in general practice. The quality circle program was evaluated within a formative and summative evaluation design by both participants and moderators for a period of 18 months using structured questionnaires. At time one, participants were asked about their goals and current job satisfaction, and rated the perceived effectiveness and the usefulness of predefined guidelines of each quality circle meeting. At time two, participants and moderators reported again about their achieved goals and job satisfaction. Two hundred and forty-three general practitioners in a district of South Germany (Südbaden), in 25 quality circle groups participated. Demographic variables of the participating physicians, quality circle goals, job satisfaction, usefulness of guidelines and perceived effectiveness of the quality circle process were collected. One hundred and six quality circle meetings were evaluated. When asked to rank the goals of quality circle work, participants provided the highest rankings for improvement of the doctor-doctor relationship, agreeing on consensus for diagnostic procedures and therapy management, and developing local guidelines. The comparison between time one and time two ratings provided evidence for an increase in overall job satisfaction. Higher benefit is correlated with more regular participation in quality circle meetings. Working with predefined guidelines is both feasible and effective in quality circles and may provide a starting point for developing guidelines in primary care. There is some empirical evidence that participating in quality circles may increase general practitioners' job satisfaction. Further studies using intervention and control group designs should investigate whether quality circles really improve daily practice through clinical audit and

  2. Developing Peacemaking Circles in a European Context. Additional Reports and Documents

    OpenAIRE

    Weitekamp, Elmar G. M.

    2016-01-01

    This volume is a companion volume to TüKrim, No. 34, which – as the main research report – represents the background and results of a pilot study to implement peace-making or healing circles in Europe. Here pieces of additional information are presented in detail. They refer in particular to issues like circle process analyses, researchers´ observation, questionnaires for circle participants, keepers´ reflection, follow-up interviews, and expert interviews. Even though victim- offender mediat...

  3. Federally sponsored multidisciplinary research centers: Learning, evaluation, and vicious circles.

    Science.gov (United States)

    Youtie, Jan; Corley, Elizabeth A

    2011-02-01

    Despite the increasing investment in multi-year federally funded science and technology centers in universities, there are few studies of how these centers engage in learning and change based on information submitted from various agents in the oversight and evaluation process. One challenge is how to manage and respond to this evaluative information, especially when it is conflicting. Although the center can learn and adapt in response to this information, it can also become subject to a vicious circle of continuous restructuring and production of documentation to address various and potentially inconsistent recommendations. In this paper we illustrate the effects of such a dynamic based on our experiences as external evaluators of the $25 million NSF-funded Learning in Informal and Formal Environments (LIFE) Center. The case study presents an analysis of annual reports and strategic planning documents along with other sources of evidence to illustrate the evolution of center organizational approaches in response to evaluations by external review panels, center evaluators, program managers, and other external stakeholders. We conclude with suggestions for how evaluators may help centers ease the cost of learning and reduce the likelihood of a vicious circle. 2010 Elsevier Ltd. All rights reserved.

  4. Development of a compact six-circle goniometer.

    Science.gov (United States)

    Tweet, D J; Oyanagi, H

    1998-05-01

    A compact versatile six-axis goniometer has been built which can be used with the scattering plane vertical or horizontal for anomalous X-ray diffraction and diffraction X-ray absorption fine structure using a tunable X-ray undulator at SPring-8. The diffractometer consists of a four-circle goniometer for the standard omega, 2theta, phi and chi motions and a two-circle goniometer on the 2theta arm for mounting the detector and analyser crystal. The goniometer is controlled via Ethernet, and standard data-acquisition software with a graphical user interface has been developed. A closed-cycle helium cryostat is mounted on the omega axis for temperature-dependent experiments from 330 K to 14 K. Preliminary experiments on a Bi(2)Sr(2)CaCu(2)O(8) single crystal demonstrate the performance. Superstructure peaks due to the one-dimensional spatial modulations in the b axis were recorded as a function of temperature above 20 K using an image plate.

  5. Increasingly branched rolling circle amplification for the cancer gene detection.

    Science.gov (United States)

    Li, Hongling; Xu, Jianguo; Wang, Zhenmeng; Wu, Zai-Sheng; Jia, Lee

    2016-12-15

    An increasingly branched rolling circle amplification (IB-RCA) which contains a padlock probe (PP) and a structurally tailored molecular beacon (MB) was innovatively developed for highly sensitive detection of cancer gene, Kras gene codon 12. In this system, the PP can be circularized after hybridization with the precisely-matched target DNA, while the stem of MB can be also opened by target DNA, resulting in hybridization with the circularized PP to generate a long tandem single-stranded DNA (ssDNA) product. Since the MB is also designed to hybridize with ssDNA product, the newly-opened MBs are able to trigger the next RCA reactions, therapy producing branched rolling circle amplification (RCA) products and in turn leading to the increasingly branched RCA (IB-RCA). This alternately and continuously operates hybridization-based MB opening and opened MBs-triggered RCA. As a result, a great number of MBs are opened that is associated with a dramatically amplified fluorescent signal, enabling to quantify target DNA down to 100 fM. This sensing method demonstrates a new concept of IB-RCA amplification even in a simple way to efficiently transduce the fluorescence signal, accomplishing the highly sensitive and selective detection of cancer gene. Copyright © 2016 Elsevier B.V. All rights reserved.

  6. Loopback rolling circle amplification for ultrasensitive detection of Kras gene.

    Science.gov (United States)

    Xu, Huo; Wu, Dong; Jiang, Yifan; Zhang, Rongbo; Wu, Qingzheng; Liu, Yiyun; Li, Feng; Wu, Zai-Sheng

    2017-03-01

    Mutations in Kras gene may be used as a diagnostic marker and a target for treatment of the broad spectrum of human cancers. In this study, we developed a new class of amplification assay, double-hairpin molecular beacon (DHMB)-based cascade rolling circle amplification (RCA), for ultrasensitive and selective detection of Kras gene in a homogenous solution. Specifically, target DNA can hybridize with DHMB and activate cyclical target strand-displacement polymerization (CTDP) and nicking-mediated strand-displacement polymerization (NMDP). The resulting nicked/displaced fragments substantially outnumber target DNA and cause the cascade rolling circle amplification (C-RCA) and nicked fragment-induced strand-displacement polymerization (NFDP). Even if four amplification processes are designed, only DHMB, padlock probe and polymerization primer are involved. Under optimized conditions, this screening system exhibits a linear range of 5 orders of magnitude (from 100fM to 20nM), and the detection limit is down to 16fM. Moreover, the developed biosensing system offers a high assay specificity for perfectly matched target DNA, and the measured data from practical samples demonstrated the potential application in the cancer diagnoses. As a proof-of-concept genetic assay, the novel signaling strategy, as well as desirable analytical capability, would significantly benefit the development of versatile amplification gene profiling platforms, revealing great promise in biological studies and medical diagnostics. Copyright © 2016 Elsevier B.V. All rights reserved.

  7. Two-colour rotations of the unit circle

    Science.gov (United States)

    Zhuravlev, Vladimir G.

    2009-02-01

    We consider two-colour, or double, rotations S_{(\\alpha,\\beta,\\varepsilon)}(x) of the unit circle C the colouring of which depends on a continuous parameter \\varepsilon\\in C and each area of which is given its own rotation angle, \\alpha or \\beta. We choose as a model the one-parameter family of two-colour rotations S_\\varepsilon(x)=S_{(2\\tau,\\tau,\\varepsilon)}(x), where \\tau=(1+\\sqrt{5}\\,)/2 is the golden ratio, which have rotation rank d=2. It is proved that the first-return map S_\\varepsilon\\vert\\mathrm{Att}_\\varepsilon (the restriction of the rotation S_\\varepsilon(x) to its attractor \\mathrm{Att}_\\varepsilon) is isomorphic to the integral map T_\\varepsilon=T(S^{\\pm1},d_\\varepsilon) constructed from the simple rotation S of the circle through the angle \\pm \\tau and some piecewise-constant function d_\\varepsilon. An exact formula is obtained for the function \

  8. Two-colour rotations of the unit circle

    Energy Technology Data Exchange (ETDEWEB)

    Zhuravlev, Vladimir G [Vladimir State Pedagogical University, Vladimir (Russian Federation)

    2009-02-28

    We consider two-colour, or double, rotations S{sub ({alpha},{beta},{epsilon})}(x) of the unit circle C the colouring of which depends on a continuous parameter {epsilon} element of C and each area of which is given its own rotation angle, {alpha} or {beta}. We choose as a model the one-parameter family of two-colour rotations S{sub {epsilon}}(x)=S{sub (2{tau},{tau},{epsilon})}(x), where {tau}=(1+{radical}5 )/2 is the golden ratio, which have rotation rank d=2. It is proved that the first-return map S{sub {epsilon}}|Att{sub {epsilon}} (the restriction of the rotation S{sub {epsilon}}(x) to its attractor Att{sub {epsilon}}) is isomorphic to the integral map T{sub {epsilon}}=T(S{sup {+-}}{sup 1},d{sub {epsilon}}) constructed from the simple rotation S of the circle through the angle {+-}{tau} and some piecewise-constant function d{sub {epsilon}}. An exact formula is obtained for the function {nu}({epsilon}) of frequency distribution of points of the orbits under the action of S{sub {epsilon}}.

  9. The Solomon Islands tsunami of 6 February 2013 field survey in the Santa Cruz Islands

    Science.gov (United States)

    Fritz, H. M.; Papantoniou, A.; Biukoto, L.; Albert, G.

    2013-12-01

    On February 6, 2013 at 01:12:27 UTC (local time: UTC+11), a magnitude Mw 8.0 earthquake occurred 70 km to the west of Ndendo Island (Santa Cruz Island) in the Solomon Islands. The under-thrusting earthquake near a 90° bend, where the Australian plate subducts beneath the Pacific plate generated a locally focused tsunami in the Coral Sea and the South Pacific Ocean. The tsunami claimed the lives of 10 people and injured 15, destroyed 588 houses and partially damaged 478 houses, affecting 4,509 people in 1,066 households corresponding to an estimated 37% of the population of Santa Cruz Island. A multi-disciplinary international tsunami survey team (ITST) was deployed within days of the event to document flow depths, runup heights, inundation distances, sediment and coral boulder depositions, land level changes, damage patterns at various scales, performance of the man-made infrastructure and impact on the natural environment. The 19 to 23 February 2013 ITST covered 30 locations on 4 Islands: Ndendo (Santa Cruz), Tomotu Noi (Lord Howe), Nea Tomotu (Trevanion, Malo) and Tinakula. The reconnaissance completely circling Ndendo and Tinakula logged 240 km by small boat and additionally covered 20 km of Ndendo's hard hit western coastline by vehicle. The collected survey data includes more than 80 tsunami runup and flow depth measurements. The tsunami impact peaked at Manoputi on Ndendo's densely populated west coast with maximum tsunami height exceeding 11 m and local flow depths above ground exceeding 7 m. A fast tide-like positive amplitude of 1 m was recorded at Lata wharf inside Graciosa Bay on Ndendo Island and misleadingly reported in the media as representative tsunami height. The stark contrast between the field observations on exposed coastlines and the Lata tide gauge recording highlights the importance of rapid tsunami reconnaissance surveys. Inundation distance and damage more than 500 m inland were recorded at Lata airport on Ndendo Island. Landslides were

  10. [Family practice quality circles between goals and reality--an interaction analysis].

    Science.gov (United States)

    Weisser, P; Härter, M; Tausch, B

    2000-01-01

    Quality circles are considered a key method for quality assurance in health care. However, there is a lack of systematic evaluation for quality circles in general practice, especially regarding the process quality of quality circle work. This article presents the results of an interaction analysis completing the systematic evaluation of quality circles in general practice in a region of south Germany. Using the so-called conference encoding method for interaction analysis we analyzed 7 out of 25 evaluated quality circles and 2348 interactions between the quality circle members. The participation rate of the moderators is high compared to the relative low contribution of the group members to the quality circle work. We could show that quality circles work topic-oriented, there is a wide exchange of experience between the group members and the group climate is positive. However, there were almost no specific activities to develop guidelines for diagnostic and therapeutic procedures. The results showed a significant discrepancy between the aims of quality circles and their practical realisation. Besides improved option for information and training programs for moderators and participants, we recommend further evaluation studies complemented with specific analysis of the process quality for example with the conference encoding method.

  11. Edges and vertices in a unique signed circle in a signed graph

    Directory of Open Access Journals (Sweden)

    Richard Behr

    2017-12-01

    Full Text Available We examine the conditions under which a signed graph contains an edge or a vertex that is contained in a unique negative circle or a unique positive circle. For an edge in a unique signed circle, the positive and negative case require the same structure on the underlying graph, but the requirements on the signature are different. We characterize the structure of the underlying graph necessary to support such an edge in terms of bridges of a circle. We then use the results from the edge version of the problem to help solve the vertex version.

  12. Position and Attitude Estimation from a Image Sequence of a Circle

    OpenAIRE

    佐藤, 真知子; Machiko, SATO; Tokyo Institute of Polytechnics Faculty of Engineering

    1995-01-01

    A method to estimate the position and attitude of a helicopter with respect to the landing site from a image sequence of a heliport is presented. The method use the circle of the heliport marking as the visual cue. The projection of the circle on the successive image taken by on board camera will change, therefore a Kalman filter can be build for the recursive estimation. The method needs to know just there is a circle ; The size of the circle is not necessary. The result of the experiment on...

  13. South Fork of the Santa Clara River, Santa Clarita Valley, California. Supplement.

    Science.gov (United States)

    1985-01-01

    well as from the Miocene Topanga sandstone and the Modelo shale found near the crest of the Santa Susana Mountains in Aliso and Rice Canyons. Fossil...ground squirrel. The woodland habitat provides excellent habitat for wildlife in the project area, particularly hole nesting species such as plain...coyote (Canis latrans), dusky-footed woodrat (Neotoma fuscipes), and California ground squirrel. The woodland habitat provides excellent habitat for

  14. Frequencies of polymorphisms of the Rh, Kell, Kidd, Duffy and Diego systems of Santa Catarina, Southern Brazil

    Directory of Open Access Journals (Sweden)

    Daiane Cobianchi Costa

    Full Text Available ABSTRACT BACKGROUND: Red blood cell genes are highly polymorphic with the distribution of alleles varying between different populations and ethnic groups. The objective of this study was to investigate gene polymorphisms of blood groups in the state of Santa Catarina, Southern Brazil. METHODS: Three hundred and seventy-three unrelated blood donors and 31 transfusion-dependent patients were evaluated to investigate polymorphisms of the Rh, Kell, Duffy, Kidd, and Diego blood group systems in a population from the state of Santa Catarina. The subjects, from seven regions that comprise the blood-banking network of the state, were assessed between August 2011 and March 2014. The genotypes of the Rh, Kell, Duffy, Kidd, and Diego systems were determined using the restriction fragment length polymorphism-polymerase chain reaction and allele-specific polymerase chain reaction techniques. RESULTS: The genotype frequencies in this study were significantly different when populations from different regions of Santa Catarina were compared. Furthermore, there were also significant differences in the genetic frequencies compared to other Brazilian states. The genotype frequencies of the Kell and Kidd blood groups are similar to European populations from Naples, Italy and Zurich, Switzerland. CONCLUSION: This article reports for the first time the frequency of polymorphisms of blood group systems in blood donors from Santa Catarina, Southern Brazil.

  15. Computer Security: a plea to Santa Claus

    CERN Multimedia

    Stefan Lueders, Computer Security Team

    2015-01-01

    Running pirated software or illegal licences, using cracking tools to bypass software activation measures, sharing music and films – these are problems that academic environments unfortunately have to deal with. All violate the copyright of the software/music/film owners, and copyright owners are not Santa Claus...    CERN, like other research organisations and universities, regularly receives allegations from external companies complaining about laptops or PCs running illegal software or sharing their films, videos or music with peers – and thus violating copyright.  Usually, we then contact the owners of the corresponding devices in order to understand whether these allegations are true. Very often such allegations boil down to a laptop whose owner replies “I confirm that a torrent client was left up and running on my device by mistake” or “This is a file that is stored on my personal hard disk.” As if those allegatio...

  16. SantaPark Oy:n asiakastyytyväisyyskysely

    OpenAIRE

    Välitalo, Marjut; Taipale, Hanna

    2011-01-01

    Opinnäytetyömme tarkoitus oli selvittää SantaPark Oy:n asiakkaiden taustatietoja ja heidän kokemuksiaan SantaParkista. Opinnäytetyön toimeksiantajana toimi SantaPark Oy, joka on Rovaniemellä Napapiirin tuntumassa sijaitseva vuonna 1998 avattu elämyspuisto. Selvitys tehtiin rajahaastattelun avulla, kvantitatiivisena tutkimuksena. Tutkimus suoritettiin kyselylomakkeella, johon oli lisätty avoimia kysymyksiä täydentämään vastauksia. Tutkimusaineisto kerättiin heinäkuun 2011 – elokuun 2011 väl...

  17. SOCIAL NETWORKS AND INTERPERSONAL COMMUNICATION

    OpenAIRE

    Veronica GHEORGHIȚĂ; Alexandrina PĂDUREȚU

    2014-01-01

    Social networks visible influence people's ability to interact and communicate. Extending social circles by establishing virtual links involves a number of positive aspects such as: instant access to options for interaction, sharing of information to large communities of people, intensification of acts of communication, high levels of feedback and trust with people with whom we communicate. On the other hand, social networks adversely affects communication by decreasing the interaction face t...

  18. Circle Hough transform implementation for dots recognition in braille cells

    Science.gov (United States)

    Jacinto Gómez, Edwar; Montiel Ariza, Holman; Martínez Sarmiento, Fredy Hernán.

    2017-02-01

    This paper shows a technique based on CHT (Circle Hough Transform) to achieve the optical Braille recognition (OBR). Unlike other papers developed around the same topic, this one is made by using Hough Transform to process the recognition and transcription of Braille cells, proving CHT to be an appropriate technique to go over different non-systematics factors who can affect the process, as the paper type where the text to traduce is placed, some lightning factors, input image resolution and some flaws derived from the capture process, which is realized using a scanner. Tests are performed with a local database using text generated by visual nondisabled people and some transcripts by sightless people; all of this with the support of National Institute for Blind People (INCI for their Spanish acronym) placed in Colombia.

  19. Training of students’ special endurance in ping pong sport circles

    Directory of Open Access Journals (Sweden)

    V.M. Grinko

    2017-04-01

    Full Text Available Urpose: to test experimentally influence of aerobic trainings (cross country training and basic aerobic on students’ special endurance in sport oriented groups (sport circles, ping pong. Material: 106 first year students (n=53 - control group and n=53 - experimental participated in experiment. For determination of temporal series’ trends R-S analysis was used. Prognostication of mistakes’ quantity per one set was fulfilled with the help of exponential smoothing method. Results: it was shown that exponential smoothing method permits to prognosticate by one set ahead with rather high accuracy. As initial predictor we found mean quantity of mistakes in all sets. It permits to average all internal and external factors, which influence on the next predicting indicators. Such approach increases confidence of mistakes’ calculation in prognostication. Criteria of prognostication methodic for possible indicators’ values were also determined. Conclusions: the recommended time distribution in program is as follows: ping pong - 75%; cross country training and basic aerobic - 25%.

  20. Minimalisasi Kekurangan Material Melalui Implementasi Quality Control Circle

    Directory of Open Access Journals (Sweden)

    Togar W. S. Panjaitan

    2011-01-01

    Full Text Available The revolution of traditional quality management concept into total quality management (TQM inspired industry for establishing and implementing quality control circle (QCC. Before starting a project as the implementation of the QCC, the training was held for supporting the knowledge of the QCC team. As the pilot project of the QCC, this research will try to minimize the percentage of the lack material in the production process of 8340 type by working together with the QCC team. The result of QCC implementation could reach the target set by the team, the percentage of the lack material reached less than 3%. The percentage of the lack material kontaktarm reduced from 3.09% to 0.00%, flachdrahtspule reduced from 9.20% to 0.40%, and niet reduced from 7.71% to 2.73%. Besides, the implementation of QCC also resulted in positive impact for all the members of the team about the benefits and experiences gained.

  1. Literature circles book club for science and language arts

    Science.gov (United States)

    Bombard, Britain

    Students from an urban middle school participated in a Science Book Club for one semester using the literature circles format. These students voluntarily attended twice weekly lunch meetings, reading books that followed their Grade 7 science classes. Groups of three to six participants read the same text, each performing rotating jobs to improve group discussions during meetings. When a group completed a book, participants created a presentation to share what they learned with the other groups in the club and the researcher/teacher. This research measured gains in science content knowledge and language arts skills focusing on reading comprehension, and literary response and analysis. Gains were measured using pre-existing district benchmarks. An ANCOVA showed that while no gains were found in science content knowledge, there were gains in language arts in the areas of reading comprehension and literary response and analysis.

  2. TRAINING OF STUDENTS’ SPECIAL ENDURANCE IN PING PONG SPORT CIRCLES

    Directory of Open Access Journals (Sweden)

    Grinko V.M.

    2017-04-01

    Full Text Available Urpose: to test experimentally influence of aerobic trainings (cross country training and basic aerobic on students’ special endurance in sport oriented groups (sport circles, ping pong. Material: 106 first year students (n=53 - control group and n=53 - experimental participated in experiment. For determination of temporal series’ trends R-S analysis was used. Prognostication of mistakes’ quantity per one set was fulfilled with the help of exponential smoothing method. Results: it was shown that exponential smoothing method permits to prognosticate by one set ahead with rather high accuracy. As initial predictor we found mean quantity of mistakes in all sets. It permits to average all internal and external factors, which influence on the next predicting indicators. Such approach increases confidence of mistakes’ calculation in prognostication. Criteria of prognostication methodic for possible indicators’ values were also determined. Conclusions: the recommended time distribution in program is as follows: ping pong - 75%; cross country training and basic aerobic - 25%.

  3. Literature Circles in 18. Century; As a Cultural Centers of Istanbul: The Role of "Literature Circles" in the Transmission of The Cultural Heritage

    Directory of Open Access Journals (Sweden)

    Zehra ÖKSÜZ

    2015-08-01

    Full Text Available The aim of this study is to explore the particular examples of literature circles which were seen as wisdom centre and were influential in 18th century Ottoman social and cultural life. This study foc uses on the literature circles in the capital of Ottomans and examines their roles in the transmission of cultural heritage. Mahfil, which means the meeting place, became the centre of literature activities which are performed in a particular place. This li terature circles gained the status of being a prestigious literature and art centre which witnessed the creation of significant works in 18th. They functioned as a transmitter of culture in terms of the works studied and role model literary figures. Patron age tradition promoted the progress of literary activities in the circles. With regard to their significant contribution to the Ottoman culture and civilization, literature circles emerged at the patronage of Sultan III. Ahmed, Sultan III. Selim, Sadrazam Nevşehirli Damad İbrahim Paşa, Sadrazam Koca Râgıb Paşa, Hoca Neş’et Efendi, Şeyh Gâlib, Hoca Süleyman Vahyî. Therefore, it is essential to study these circles in terms of its importance as being home to important literary figures with a sophisticated sen se of art.

  4. The E-learning Circle – a holistic software design tool for e-learning

    Directory of Open Access Journals (Sweden)

    Arvid Staupe

    2010-07-01

    Full Text Available The article introduces the E-learning Circle, a tool developed to assure the quality of the software design process of e-learning systems, considering pedagogical principles as well as technology. The E-learning Circle consists of a number of concentric circles which are divided into three sectors. The content of the inner circles is based on pedagogical principles, while the outer circle specifies how the pedagogical principles may be implemented with technology. The circle’s centre is dedicated to the subject taught, ensuring focus on the specific subject’s properties. The three sectors represent the student, the teacher and the learning objectives. The strengths of the E-learning Circle are the compact presentation combined with the overview it provides, as well as the usefulness of a design tool dealing with complexity, providing a common language and embedding best practice. The E-learning Circle is not a prescriptive method, but is useful in several design models and processes. The article presents two projects where the E-learning Circle was used as a design tool.

  5. Quality circles to improve prescribing patterns in primary medical care: what is their actual impact?

    NARCIS (Netherlands)

    Wensing, M.J.P.; Broge, B.; Kaufmann-Kolle, P.; Andres, E.; Szecsenyi, J.

    2004-01-01

    RATIONALE, AIMS AND OBJECTIVES: Quality circles comprise small group sessions of doctors and written feedback on their individual practice patterns. Although 50% of German primary care doctors participate in quality circles, their effectiveness has hardly been evaluated in Germany. This study

  6. Quality Circles: The Effects of Varying Degrees of Voluntary Participation on Employee Attitudes and Program Efficacy.

    Science.gov (United States)

    Geehr, Jill L.; And Others

    1995-01-01

    A study with 206 federal government employees reveals that degree of voluntary participation in quality circles is positively related to following quality circle guidelines and that following such guidelines is positively related to economic gain. Implications of voluntary and nonvoluntary participation on cost-benefit outcomes is discussed. (SLD)

  7. Providing a Full Circle of Support to Teachers in an Inclusive Elementary School

    Science.gov (United States)

    Waldron, Nancy L.; Redd, Lacy

    2011-01-01

    Providing a full circle of support to teachers in an inclusive elementary school, the Newberry Elementary School (NES) principal and staff have worked for 5 years to ensure the inclusion of students with disabilities in general education classrooms. The authors would like to share their perceptions of how this full circle (the multiple systems) of…

  8. Fostering Positive Peer Relations in the Primary Classroom through Circle Time and Co-Operative Games

    Science.gov (United States)

    Mary, Latisha

    2014-01-01

    The aim of this study was to investigate the role of co-operative games and circle time activities in fostering positive peer relations in two French Primary classrooms (N = 40). It presents French teachers' and pupils' perceptions of a set of co-operative games and circle time activities implemented within a year long study on personal, social…

  9. When Two Circles Determine a Triangle. Discovering and Proving a Geometrical Condition in a Computer Environment

    Science.gov (United States)

    Metaxas, Nikolaos; Karagiannidou, Andromachi

    2010-01-01

    Visualization of mathematical relationships enables students to formulate conjectures as well as to search for mathematical arguments to support these conjectures. In this project students are asked to discover the sufficient and necessary condition so that two circles form the circumscribed and inscribed circle of a triangle and investigate how…

  10. Normal Variants of the Circle of Willis in patients undergoing CT Angiography

    Directory of Open Access Journals (Sweden)

    V Natraj Prasad

    2017-03-01

    Full Text Available Background & Objectives: The Circle of Willis represents the important anastomotic cerebral vessels at the base of the brain. Variation in the Circle of Willis is common. A complete or normal Circle of Willis varies widely in the literature. As no prior data on the variations of Circle of Willis is available on Nepalese population, this study was undertaken in patients undergoing CT Angiography.Materials & Methods: During the period July 2016 till Dec 2016, 65 patients who were referred for brain CT Angiography (Toshiba Aquilion Prime 160 slice Multi Detector CT scanner from medicine, neurology and neuro-surgery were included in the study. CT scans were taken from the base of skull to the vertex. In addition to the axial source data, post-processed multiplanar reformatted (MPR, maximum-intensity projection (MIP, and 3D volume-rendering (VR images were evaluated. Results: Of the 65 patients who underwent CT Angiography a normal or complete Circle of Willis was seen in only 35.4 % (23 patients. The most common variant of the Circle of Willis was a hypoplastic Pcom seen in 26.2 % (17 patients. This was followed by fetal origin of PCA seen in 13.8 % (9 patients. An absent Pcom and hypoplastic / absent Acom was in 12.3 % each (8 patients each. Conclusion: Variation in the Circle of Willis is common. Variations in the posterior portion of the Circle of Willis are more common than the anterior portion.

  11. Dynamic Investigation of Triangles Inscribed in a Circle, Which Tend to an Equilateral Triangle

    Science.gov (United States)

    Stupel, Moshe; Oxman, Victor; Sigler, Avi

    2017-01-01

    We present a geometrical investigation of the process of creating an infinite sequence of triangles inscribed in a circle, whose areas, perimeters and lengths of radii of the inscribed circles tend to a limit in a monotonous manner. First, using geometrical software, we investigate four theorems that represent interesting geometrical properties,…

  12. A surface containing a line and a circle through each point is a quadric

    KAUST Repository

    Nilov, Fedor K.

    2012-06-20

    We prove that a surface in 3-dimensional Euclidean space containing a line and a circle through each point is a quadric. We also give some particular results on the classification of surfaces containing several circles through each point. © 2012 Springer Science+Business Media B.V.

  13. Carnegie, Dupont Circle, and the AAUP: (Re)Shaping a Cosmopolitan, Locally Engaged Professoriate

    Science.gov (United States)

    Rhoades, Gary

    2009-01-01

    In this article, the author looks back at the academic profession in the 20th century, as it was shaped by the Carnegie Foundation for the Advancement of Teaching, by key higher education associations situated at One Dupont Circle in Washington D.C. ("Dupont Circle" became the collective name for these associations), and by the American…

  14. The Effect of Literature Circles on Text Analysis and Reading Desire

    Science.gov (United States)

    Karatay, Halit

    2017-01-01

    In order to make teaching activities more appealing, different techniques and strategies have been constantly employed. This study utilized the strategy of "literature circles" to improve the text-analysis skills, reading desires, and interests of prospective teachers of Turkish. "Literature circles" was not chosen to be used…

  15. We Can All Participate! Adapting Circle Time for Children with Autism

    Science.gov (United States)

    Barton, Erin E.; Reichow, Brian; Wolery, Mark; Chen, Ching-I

    2011-01-01

    This article describes a set of strategies for including children with autism in circle time. Successful inclusion involves careful planning, collaboration, and consideration of individual needs. Circle time can be a positive activity for children with autism when individual needs and strengths are considered. Environmental modifications and…

  16. The Circle Nephrostomy Tube: An Attractive Nephrostomy Drainage System Following Complex Percutaneous Nephrolithotomy.

    Science.gov (United States)

    El Tayeb, Marawan M; Borofsky, Michael S; Lingeman, James E

    2017-05-01

    To describe our experience with the circle nephrostomy tube (NT) (Cook Medical), a drainage system uniquely designed for use after multiple-access percutaneous nephrolithotomy (PNL). A retrospective review of 1317 consecutive patients undergoing 1599 PNLs at IU Health Methodist Hospital was performed. All multiple access cases utilizing circle NTs were reviewed and analyzed. The method of insertion of circle NT was demonstrated. A total of 1843 accesses were obtained in 1599 renal units (RUs): 380 upper pole, 129 interpolar, and 1334 lower pole. Multiple accesses in this series were required in 282 RUs (17.6%). Following multiple-access PNL, circle NTs, Cope loop, and reentry Malecot NTs were inserted in 91 RUs (32.3%), 208 RUs (73.8%), and 31 RUs (11%), respectively. None of the patients who had circle NT experienced clogging, dislodgement, or obstruction of the tube. The cost of circle, Cope loop, and Malecot NTs are 121.73 USD, 95.20 USD, and 81 USD, respectively. Circle NTs are easy to insert, secure, cost-effective compared with inserting two NTs. Circle NTs provide excellent drainage and facilitate secondary procedures. Copyright © 2017 Elsevier Inc. All rights reserved.

  17. Seeds of Change: Using Peacemaking Circles to Build a Village for Every Child

    Science.gov (United States)

    Boyes-Watson, Carolyn

    2005-01-01

    Roca, Inc., a grassroots human development and community organization, has adopted the peacemaking circle as a tool in its relationship building with youth, communities, and formal systems. Circles are a method of communication derived from aboriginal and native traditions. In Massachusetts, the Department of Social Services and the Department of…

  18. Accuracy of tree diameter estimation from terrestrial laser scanning by circle-fitting methods

    Science.gov (United States)

    Koreň, Milan; Mokroš, Martin; Bucha, Tomáš

    2017-12-01

    This study compares the accuracies of diameter at breast height (DBH) estimations by three initial (minimum bounding box, centroid, and maximum distance) and two refining (Monte Carlo and optimal circle) circle-fitting methods The circle-fitting algorithms were evaluated in multi-scan mode and a simulated single-scan mode on 157 European beech trees (Fagus sylvatica L.). DBH measured by a calliper was used as reference data. Most of the studied circle-fitting algorithms significantly underestimated the mean DBH in both scanning modes. Only the Monte Carlo method in the single-scan mode significantly overestimated the mean DBH. The centroid method proved to be the least suitable and showed significantly different results from the other circle-fitting methods in both scanning modes. In multi-scan mode, the accuracy of the minimum bounding box method was not significantly different from the accuracies of the refining methods The accuracy of the maximum distance method was significantly different from the accuracies of the refining methods in both scanning modes. The accuracy of the Monte Carlo method was significantly different from the accuracy of the optimal circle method in only single-scan mode. The optimal circle method proved to be the most accurate circle-fitting method for DBH estimation from point clouds in both scanning modes.

  19. A Historical Note on the Proof of the Area of a Circle

    Science.gov (United States)

    Wilamowsky, Yonah; Epstein, Sheldon; Dickman, Bernard

    2011-01-01

    Proofs that the area of a circle is nr[superscript 2] can be found in mathematical literature dating as far back as the time of the Greeks. The early proofs, e.g. Archimedes, involved dividing the circle into wedges and then fitting the wedges together in a way to approximate a rectangle. Later more sophisticated proofs relied on arguments…

  20. On the existence of periodic orbits for the fixed homogeneous circle problem

    OpenAIRE

    Azevêdo, C.; Ontaneda, P.

    2007-01-01

    We prove the existence of some types of periodic orbits for a particle moving in Euclidean three-space under the influence of the gravitational force induced by a fixed homogeneous circle. These types include periodic orbits very far and very near the homogeneous circle, as well as eight and spiral periodic orbits.

  1. Santa Barbara, California Tsunami Forecast Grids for MOST Model

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Santa Barbara, California Forecast Model Grids provides bathymetric data strictly for tsunami inundation modeling with the Method of Splitting Tsunami (MOST)...

  2. Santa Monica, California Tsunami Forecast Grids for MOST Model

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Santa Monica, California Forecast Model Grids provides bathymetric data strictly for tsunami inundation modeling with the Method of Splitting Tsunami (MOST)...

  3. Geology and geomorphology--Offshore Santa Cruz, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the geologic and geomorphic map of the Offshore Santa Cruz map area, California. The vector data file is included in...

  4. Geology and geomorphology--Offshore of Santa Barbara, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3281 presents data for the geologic and geomorphic map (see sheet 10, SIM 3281) of the Offshore of Santa Barbara map area, California. The vector...

  5. Backscatter B [USGS]--Offshore of Santa Barbara, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3281 presents data for part of the acoustic-backscatter map (see sheet 3, SIM 3281) of the Offshore of Santa Barbara map area, California. The...

  6. Backscatter A [CSUMB]--Offshore of Santa Barbara, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3281 presents data for part of the acoustic-backscatter map (see sheet 3, SIM 3281) of the Offshore of Santa Barbara map area, California. The...

  7. Bathymetry and Acoustic Backscatter: Northern Santa Barbara Channel, Southern California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This report presents bathymetry and acoustic backscatter data collected in July 2008 in the northern Santa Barbara Channel, California, using a bathymetric sidescan...

  8. Environmental Law Series Links Campus and Community in Santa Barbara.

    Science.gov (United States)

    McGinnes, J. Marc

    1981-01-01

    Describes a three-course series in environmental law developed at the University of California, Santa Barbara as part of the undergraduate Environmental Studies Program. The series progresses from theory to simulation to field experience. (Author/WB)

  9. Seafloor character--Offshore of Santa Barbara, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3281 presents data for the seafloor-character map (see sheet 5, SIM 3281) of the Offshore of Santa Barbara map area, California. The raster data...

  10. ULYSSES comes full circle, before revisiting the Sun's poles

    Science.gov (United States)

    1998-04-01

    From its unique perspective, Ulysses has provided scientists with the very first all-round map of the heliosphere, the huge bubble in space filled by the Sun's wind. The Earth swims deep inside the heliosphere, and gusts and shocks in the solar wind can harm satellites, power supplies and ommunications. They may also affect our planet's weather. A better grasp of the solar weather in the heliosphere is therefore one of the major aims of ESA's science programme. In a project of international cooperation between ESA and NASA, Ulysses was launched towards Jupiter in October 1990 by the US space shuttle Discovery. Arriving in February 1992, Ulysses stole energy from the giant planet in a slingshot manoeuvre and was propelled back towards the Sun in an elongated orbit almost at right angles to the ecliptic plane, where the Earth and other planets circle the Sun. "This month Ulysses returns to the point in space where its out-of-ecliptic journey began, but Jupiter isn't there," explains Richard Marsden, ESA's project scientist for Ulysses. "Following its own inexorable path around the Sun, Jupiter is far away on the opposite side of the Solar System. So Ulysses' course will not be changed a second time. The spacecraft is now in effect a man-made comet, forever bound into a 6-year polar orbit around the Sun." Ulysses now starts its second orbit. It will travel over the poles of the Sun in 2000-2001 just as the count of dark sunspots is expected to reach a maximum. With its operational life extended for the Ulysses Solar Maximum Mission, the spacecraft will find the heliosphere much stormier than during its first orbit. Discoveries so far Like its mythical namesake, Ulysses has already had an eventful voyage of discovery. Its unique trajectory has provided the scientific teams with a new perspective, from far out in space and especially in the previously unknown regions of the heliosphere over the Sun's poles. Passing within 9.8 degrees of the polar axis, the highly

  11. Migraine without aura is not associated with incomplete circle of Willis

    DEFF Research Database (Denmark)

    Ezzatian-Ahar, Shabnam; Amin, Faisal Mohammad; Obaid, Hayder Ghani

    2014-01-01

    the prevalence of incomplete circle of Willis in migraineurs and controls. In the present study we compared the prevalence of incomplete circle of Willis in female migraine patients without aura to female healthy non-migraine controls.Using 3-Tesla magnetic resonance angiography we recorded three......-dimensional time-of-flight angiograms in 85 female participants (48 migraine patients without aura [median age 28 years] and 37 healthy controls [median age 25 years]). The images were subsequently analysed blindly by a neuroradiologist to detect incomplete circle of Willis. FINDINGS: We found no difference...... between the prevalence of incomplete circle of Willis in patients, 20/47 (43%), and controls, 15/37 (41%), p = 0.252. Post hoc analysis showed a significant relationship between age and prevalence of incomplete circle of Willis, p = 0.003. CONCLUSION: We found no relationship between migraine without aura...

  12. Vision-based technique for circle detection and measurement using lookup table and bitwise center accumulator.

    Science.gov (United States)

    Yu, Hancheng; Wang, Tuo

    2017-03-01

    In this paper, we proposed a fast algorithm for circle detection and measurement, which uses a lookup table and bitwise center accumulator (LUT-BCA). The LUT-BCA is a two-stage procedure. The first stage determines the candidate circle centers with normal lines produced by the lookup table and recorded by the bitwise center accumulator. The second stage computes the radius of each candidate circle center and validates these centers, which eliminates the false detections. The proposed LUT-BCA can also be easily implemented on massively parallel high-performance graphics hardware using the compute unified device architecture. Experimental results indicate that the LUT-BCA can locate circle centers and measure their radii accurately and is very suitable for real-time circle detection and measurement.

  13. A new method for fast circle detection in a complex background image

    Science.gov (United States)

    Wu, Meijun; Yang, Jie; Sun, Yadong

    2011-11-01

    A new method for circle detection, Hough gradient clustering method, has been developed in this paper. By using gradient direction angle to find the diameter of a circle, the new method can rapidly detect the circle in a complex background. The crucial steps in this method are the feature extraction and the clustering of the points which have the same gray direction angle and are collinear along the gradient direction. The application of the two-to-one space mapping and 1-2Hough transform can further reduce the useless calculation in the process of circle detection. Comparing with the Hough gradient method in OpenCV, the newly developed method shows a higher efficiency of circle detection in a complex background image as well as a great improvement in the anti-noise ability.

  14. Circles of Support and Accountability for Sex Offenders: A Systematic Review of Outcomes.

    Science.gov (United States)

    Clarke, Martin; Brown, Susan; Völlm, Birgit

    2017-08-01

    We conducted a systematic review of studies reporting on the effectiveness of Circles of Support and Accountability (Circles). Circles use volunteers to provide support for sex offenders living in the community. We searched 10 databases up to the end of 2013 and identified 3 relevant outcome studies. An additional 12 papers or reports were identified by searching reference lists, Google, and contacting key authors and Circles providers to obtain unpublished data. These 15 studies comprised one randomized controlled trial, three retrospective cohorts with matched controls, and 11 case series. The majority reported measures of recidivism, particularly reconviction. The 4 studies with controls generally reported that participation in Circles was associated with lower recidivism although there were few statistically significant differences. Few studies examined changes in risk or psychosocial outcomes. A number of methodological issues are discussed. Longer term, prospective follow-up studies with control groups are required to address these issues.

  15. Morphometry and Variability of the Brain Arterial Circle in Chinchilla (Chinchilla laniger, Molina).

    Science.gov (United States)

    Kuchinka, Jacek

    2017-08-01

    Arterial circles of brains from 70 adult chinchillas were filled with synthetic latex. The arterial circle of the brain is formed as the result of vertebral arteries being merged into the basilar artery. Caudally, both vertebral arteries gave rise to the ventral spinal artery. The ventral spinal artery splits into tiny cerebellar vessels, the pontine and cochlear branches. Distally, the basilar artery ramified into two terminal branches that formed the arterial circle of brain, rostrally open in most cases (75%). The observed variability of the arterial circle of brain of chinchillas pertained to all elements of that circle. The greatest variability within the vessels of the circle of Willis in chinchillas was observed in 22 cases (31.4%) of internal ophthalmic arteries. In chinchillas, a trend toward slight variability within the arteries comprising the arterial circle of the brain was observed in 44 animals. This accounted for 62.8% of all cases. Only in three cases was the arterial circle of brain clearly symmetrical. At the same time, 23 animals (32.8%) revealed features of significant vascular variability within the brain base region. These consisted of disturbed geometry of the entire arterial circle, different levels of ramifications into individual arteries, as well as the number and diameter of arteries. No internal carotid arteries were observed in chinchillas apart from one atypical case in which the carotid artery extended unilaterally into the basilar artery. These investigations indicate on the significant variability of arterial circle in rodents. Anat Rec, 300:1472-1480, 2017. © 2017 Wiley Periodicals, Inc. © 2017 Wiley Periodicals, Inc.

  16. In Santa We Trust: Santa Claus as a God, and Consumption as Religion

    OpenAIRE

    Staver, Jeppe

    2014-01-01

    I denne oppgaven ble usagnet "Julenissen (Santa Claus) kan bli ansett som en gud, og konsum kan bli kategorisert som en religion" analysert og funnet belegg for. Studiet ble basert på et gruppeintervju med fire barn i 7-8 års-alderen, samt to reklamebilder med hovedsaklig like bilder, men med forskjellig tekst, hvor et var på norsk og et på engelsk. Problemer med metodevalget viste seg tidlig i analysen av intervjuet, da både intervjutypen (gruppeintervju) og tiden for intervjuet var problem...

  17. Online cardiac arrhythmia classification by means of circle maps analysis implemented on an intelligent miniaturized sensor.

    Science.gov (United States)

    Schiek, Michael; Schlösser, Mario; Schnitzer, Andreas; Ying, Hong

    2008-01-01

    The intermittent occurrence of cardiac arrhythmias like e.g. atrial fibrillation hampers their diagnosis and hence the treatment. Since persons suffering from atrial fibrillation are known to have a remarkable increased risk of stroke the diagnosis of atrial fibrillation is a matter of great importance. Easy and comfortable to use long term ECG recording systems capable of online arrhythmia classification might help to solve this problem. We developed an intelligent, miniaturized, and wireless networking sensor which allows lossless local data recordings up to 4 GB. With its outer dimensions of 20mm per rim and less than 15g of weight including the Lithium-Ion battery our modular designed sensor node is thoroughly capable of up to eight channel recordings with 8 kHz sample rate each and provides sufficient computational power for online digital signal processing. For online arrhythmia classification we will record one ECG channel and 3-axis accelerometer data with 512 Hz each, the later being used for activity classification based artifact identification. We adapted our recently developed circle maps analysis of short term heart rate variation to run on this miniaturized intelligent sensor powered by the Texas Instruments MSP430 microcontroller derivate F1611. With this configuration we started to evaluate the cardiac arrhythmia classification in long term ECG recordings.

  18. Study Circles in Online Learning Environment in the Spirit of Learning-Centered Approach

    Directory of Open Access Journals (Sweden)

    Simándi Szilvia

    2017-08-01

    Full Text Available Introduction: In the era of information society and knowledge economy, learning in non-formal environments gets a highlighted role: it can supplement, replace or raise the knowledge and skills gained in the school system to a higher level (Forray & Juhász, 2008, as the so-called “valid” knowledge significantly changes due to the acceleration of development. With the appearance of information technology means and their booming development, the possibilities of gaining information have widened and, according to the forecasts, the role of learning communities will grow. Purpose: Our starting point is that today, with the involvement of community sites (e.g. Google+, Facebook etc. there is a new possibility for inspiring learning communities: by utilizing the power of community and the possibilities of network-based learning (Ollé & Lévai, 2013. Methods: We intend to make a synthesis based on former research and literature focusing on the learning-centered approach, online learning environment, learning communities and study circles (Noesgaard & Ørngreen, 2015; Biggs & Tang, 2007; Kindström, 2010 Conclusions: The online learning environment can be well utilized for community learning. In the online learning environment, the process of learning is built on activity-oriented work for which active participation, and an intensive, initiative communication are necessary and cooperative and collaborative learning get an important role.

  19. The role of Circle women in curbing violence against women and girls in Africa

    Directory of Open Access Journals (Sweden)

    Sylvia Owusu-Ansah

    2016-07-01

    Full Text Available The article looks at the role Circle of Concerned African Women Theologians (the Circle have played in the struggle to end or reduce the rate at which violence against women and girls occurs in West Africa by highlighting the contributions of older Circle women, especially the initiator of the Circle, Mercy Amba Oduyoye. The initiator of the Circle and other older Circle women have left a remarkable legacy that needs to continue by the current and future generations of the Circle. The background information examines the leadership and mentorship of Mercy Amba Oduyoye and the impact she has made in the lives of African women. The essay then looks at the types of violence that women face in West Africa with the specific contributions of Circle women in the struggle to end violence against women and girls. It then argues that Circle women have played very significant roles both in setting the pace and giving the platform for women activities to minimise gender-based violence against women and girls. Circle women have written and presented papers that have addressed many challenges including HIV and/or AIDS, Girl Child trafficking, Marriage of Minors, and almost all kinds of violence against women and girls. Currently, religious violence threatens the fabric of African nations causing insecurity and panic, women and girls being the most vulnerable. The challenge to the present and future Circle members is to contribute in significant ways towards religious harmony in Africa and beyond. The Circle acknowledges the leadership role of women and encourages them to spearhead the liberation of women as well as empower them to be able to aspire to get to the top or become independent. No one understands what someone else feels better than the person experiencing the ordeal. Women can better understand what they go through and also have the passion to strive towards liberation.Intradisciplinary and/or interdisciplinary implications: In this article, the

  20. An in vitro assessment of the cerebral hemodynamics through three patient specific circle of Willis geometries.

    Science.gov (United States)

    Fahy, Paul; Delassus, Patrick; McCarthy, Peter; Sultan, Sheriff; Hynes, Niamh; Morris, Liam

    2014-01-01

    The Circle of Willis (CoW) is a complex pentagonal network comprised of fourteen cerebral vessels located at the base of the brain. The collateral flow feature within the circle of Willis allows the ability to maintain cerebral perfusion of the brain. Unfortunately, this collateral flow feature can create undesirable flow impact locations due to anatomical variations within the CoW. The interaction between hemodynamic forces and the arterial wall are believed to be involved in the formation of cerebral aneurysms, especially at irregular geometries such as tortuous segments, bends, and bifurcations. The highest propensity of aneurysm formation is known to form at the anterior communicating artery (AcoA) and at the junctions of the internal carotid and posterior communicating arteries (PcoAs). Controversy still remains as to the existence of blood flow paths through the communicating arteries for a normal CoW. This paper experimentally describes the hemodynamic conditions through three thin walled patient specific models of a complete CoW based on medical images. These models were manufactured by a horizontal dip spin coating method and positioned within a custom made cerebral testing system that simulated symmetrical physiological afferent flow conditions through the internal carotid and vertebral arteries. The dip spin coating procedure produced excellent dimensional accuracy. There was an average of less than 4% variation in diameters and wall thicknesses throughout all manufactured CoW models. Our cerebral test facility demonstrated excellent cycle to cycle repeatability, with variations of less than 2% and 1% for the time and cycle averaged flow rates, respectively. The peak systolic flow rates had less than a 4% variation. Our flow visualizations showed four independent flow sources originating from all four inlet arteries impacting at and crossing the AcoA with bidirectional cross flows. The flow paths entering the left and right vertebral arteries dissipated

  1. Quality circles to improve prescribing patterns in primary medical care: what is their actual impact?

    Science.gov (United States)

    Wensing, Michel; Broge, Björn; Kaufmann-Kolle, Petra; Andres, Edith; Szecsenyi, Joachim

    2004-08-01

    Quality circles comprise small group sessions of doctors and written feedback on their individual practice patterns. Although 50% of German primary care doctors participate in quality circles, their effectiveness has hardly been evaluated in Germany. This study determined the impact of a large-scale programme of quality circles on quality and costs of prescribing. A controlled before-after study was performed, in which primary care doctors were allocated to a quality circles group or a control group. Subjects were 100,000 patients in 1996 and in 1998, who had visited one of 177 doctors in the 3 month registration periods in one region in Germany. The intervention comprised a quality circles programme, comprising 11 sessions and repeated feedback on prescribing. Main outcome measures were proportion of patients who received a prescription, mean prescription costs per patient and proportion of generic prescriptions. The absolute numbers of prescriptions decreased in both groups, but the mean prescription costs per patient increased. The quality circles reduced the proportion of patients who received a prescription (OR = 0.86) and the mean prescription costs per patient (B = -3.99 euro), while it increased the proportion of generic drugs (OR = 1.10). The intervention had intended effects on four of the 15 secondary indicators. Large-scale application of quality circles had intended effects on prescribing decisions in primary care in Germany. The effects found in this study may reflect better what improvements can be achieved than randomized trials of similar interventions.

  2. [Quality circles in rehabilitation clinics. What has been effective in general practice?].

    Science.gov (United States)

    Häussler, B

    1998-06-01

    Within the framework of their quality assurance programme, the German statutory pension funds in 1994 and 1995 required over 400 rehabilitation hospitals to develop structures permitting to establish comprehensive quality management programmes. In particular, they asked that these hospitals should establish quality circles. Structured information could be gathered from 380 hospitals at the end of a pilot phase. According to this information, 233 hospitals conduct a total of 558 quality circles. However, only 23.5% of these quality circles fulfil the criteria of a well-structured quality circle. Another 34.7% of the reported activities can, in a broader sense, be considered as activities that might be helpful in developing Total Quality Management (TQM) systems, whereas 41.8% account for more routine activities such as floor meetings etc. A detailed analysis of the documented information revealed that a high proportion of quality circle participants are recruited from leadership positions. From a subject matter perspective, quality circles still focus on their conceptualization. Taking into consideration the large number of hospitals, the introduction of quality circles can be considered quite successful.

  3. Variations in cerebral arterial circle of Willis in adult Pakistani population.

    Science.gov (United States)

    Siddiqi, Hina; Tahir, Mohammad; Lone, Khalid Parvez

    2013-09-01

    To identify the anatomical variations in cerebral arterial circle of Willis. Descriptive study. Department of Anatomy, University of Health Sciences, Lahore, from February 2009 to January 2010. Human brains were removed from fifty-one consecutive cadavers at the time of autopsy from Forensic Department, King Edward Medical University, Lahore, to observe anatomical variations in the cerebral arterial circle regarding its completeness, pattern and symmetry. The individual cerebral vessels were also noted for the presence, origin, caliber and symmetry. Pictures from each dissection, showing the complete circle were taken. The variations of the circle as whole and segmental variations were studied and described in percentage. Thirty-seven (72.5%) of the 51 (100%) cerebral arterial circles were complete; 15 subjects (29.4%) had typical configuration; 25 (49%) had symmetrical arrangement and 39 subjects (76.4%) had different types of variations in their component vessels. Variations were most common in the posterior communicating artery followed by anterior communicating artery, pre-communicating segments of the posterior cerebral and pre-communicating segments of anterior cerebral arteries. No circle was found with aneurysm. Different variations in the formation of circle of Willis and in its component vessels are common in the local adult population of Pakistan. These should be taken into consideration during angiographic evaluation and neurosurgical procedures on the anterior circulation.

  4. The "dot-in-circle" sign in musculoskeletal mycetoma on magnetic resonance imaging and ultrasonography.

    Science.gov (United States)

    Laohawiriyakamol, Teeranan; Tanutit, Pramot; Kanjanapradit, Kanet; Hongsakul, Keerati; Ehara, Shigeru

    2014-01-01

    This study aimed to present the 'dot-in-circle' sign, which indicates the typical magnetic resonance imaging (MRI) and ultrasonographic (USG) findings for mycetoma involving soft tissue and bone. A total of 8 cases with histopathological proof of mycetoma affecting the musculoskeletal system, and that were examined via MRI and/or coexistent diagnostic ultrasonography between 2004 and 2013 in Songklanagarind Hospital were included in this study. The 'dot-in-circle' sign on the MRI and USG images of all the patients was reviewed by two radiologists. The analytic method was descriptive. All cases of musculoskeletal mycetoma revealed the 'dot-in-circle' sign on MRI, which was seen as multiple, small, round- to oval-shaped hyperintense lesions separated and surrounded by a low-signal intensity rim (circle), and a tiny, central, low-signal focus (dot). An USG study was available in four patients, and all USG findings demonstrated the 'dot-in-circle' sign as a central hyperechoic area (dot) surrounded by hypoechoic tissue (circle). In conclusion, the 'dot-in-circle' sign is a typical feature on MRI and USG findings for the diagnosis of musculoskeletal mycetoma.

  5. Anofelinos de Santa Catarina (Diptera: Culicidae, Brasil Anophelines of Santa Catarina (Diptera: Culicidae, Brazil

    Directory of Open Access Journals (Sweden)

    Maria da Graça Teixeira Portes

    2010-04-01

    Full Text Available INTRODUÇÃO: No Brasil, a Região Amazônica é endêmica em malária. Em Santa Catarina, a malária foi eliminada na década de 80. A partir daí, ocorreram poucos casos autóctones isolados, e esporádicos. No entanto, em função da existência do vetor em seu território, da existência de extensa área endêmica no Brasil e da grande mobilidade de pessoas em áreas turísticas no estado, existe a probabilidade de reintrodução da doença. MÉTODOS: Utilizou-se os seguintes dados: Banco de Dados do Núcleo de Entomologia da Fundação Nacional de Saúde, Santa Catarina (ACCES,1997-2000; Sistema de Informação de Vigilância Epidemiológica, Secretaria de Vigilância em Saúde (Malária/SC e Sistema de Informação de Notificação e Agravo(SINAN/SC. Os mesmos foram transportados e analisados, no programa Microsoft Office Excel 2007. RESULTADOS: As coletas foram realizadas em 48 municípios, 159 localidades, sendo identificados 12.310 Culicídeos, 11.546 (93,7% Anopheles e 764 (6,2% como outros. Foram identificados três subgêneros e 13 espécies de anofelinos. CONCLUSÕES: Considerando que nos municípios pesquisados, foi identificada a presença de importantes vetores como Anopheles cruzii e Anopheles albitasis e há circulação de pessoas infectadas provenientes de áreas endêmicas, pode-se considerar que os mesmos são áreas receptivas e vulneráveis à malária. Essas espécies são suspeitas de serem responsáveis pela transmissão de malária na região, principalmente nos municípios de Gaspar, Indaial e Rodeio.INTRODUCTION: The Amazon region of Brazil is endemic for malaria. In the State of Santa Catarina, malaria was eliminated in the 1980s. Since then, a few sporadic isolated autochthonous cases have occurred. However, because malaria vectors are present within Brazilian territory and extensive endemic areas exist in this country, along with the great mobility of people in tourist areas of Santa Catarina, there is the

  6. Meat quality of Santa Inês and F1 Santa Inês x Dorper Lambs

    Directory of Open Access Journals (Sweden)

    Rafael dos Santos Costa

    2014-09-01

    Full Text Available ABSTRACT. Costa R.S., Henriques L.S.V., Tavares E.M., Alves E.N., Henry F.C. & Quirino C.R. [Meat quality of Santa Inês and F1 Santa Inês x Dorper Lambs.] Qualidade da carne de cordeiros Santa Inês e F1 Santa Inês x Dorper. Revista Brasileira de Medicina Veterinária, 36(3:337-343, 2014. Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, RJ 28013-602, Brasil. E-mail: fabiocosta@uenf.br Fifty intact male ovines breed were randomly assembled, 25 of the Santa Inês breed and 25 F1 Santa Inês x Dorper to evaluation of dental cronology, live weight at slaughter, withers height, hip height, body length and thorax circumference. After exsanguination, were measured temperature and pH at different times (4h; 12h and 24h of Semitendinosus and Triceps brachii muscles and shear force or tenderness (48h of Semitendinosus muscle. In parallel was accomplished the sensorial analysis relationships to instrumental values of this muscle. The chilling room temperature varied between 12.2°C (4h a -0.5°C (24h, and the mean temperature of carcasses was 26.80°C and -0.20°C, respectively. The mean initial pH of Semitendinosus was 6.62 and final 5.64 and of Triceps brachii was 6.50 (4h and 5.68 (24h. Semitendinosus muscle shear force and tenderness was similar in lambs of Santa Ines breed and F1 Dorper x Santa Ines, demonstrating that the genetic group did not affect meat tenderness. The sensory panel confirmed the results obtained in instrumental analysis. The correlation of instrumental analysis (shear force when compared different genetic groups, was found a good inversed correlation (r = -0.87. The mean of body length and thorax circumference levels don’t have significant difference between genetic groups. The mean of morphometric measurements analyzed on Santa Inês was higher than F1 Santa Inês x Dorper, but don’t have

  7. Handwriting: hand-pen contact force synergies in circle drawing tasks.

    Science.gov (United States)

    Shim, Jae Kun; Hooke, Alexander W; Kim, You-Sin; Park, Jaebum; Karol, Sohit; Kim, Yoon Hyuk

    2010-08-26

    This study investigated synergistic actions of hand-pen contact forces during circle drawing tasks in three-dimensional (3D) space. Twenty-four right-handed participants drew thirty concentric circles in the counterclockwise (CCW) and clockwise (CW) directions. Three-dimensional forces acting on an instrumented pen as well as 3D linear and angular positions of the pen were recorded. These contact forces were then transformed into the 3D radial, tangential, and normal force components specific to circle drawing. Uncontrolled manifold (UCM) analysis was employed to calculate the magnitude of the hand-pen contact force synergy. Three hypotheses were tested. First, hand-pen contact force synergies during circle drawing are dependent on the angular position of the pen tip. Second, hand-pen contact force synergies are dependent on force components in circle drawing. Third, hand-pen contact force synergies are greater in CCW direction than CW direction. The results showed that the strength of the hand-pen contact force synergy increased during the initial phase of circle drawing and decreased during the final phase. The synergy strength was greater for the radial and tangential components as compared to the normal component. Also, the circle drawing in CW direction was associated with greater hand-pen contact force synergy than the CCW direction. The results of this study suggest that the central nervous system (CNS) prioritizes hand-pen contact force synergies for the force components (i.e., radial and tangential) that are critical for circle drawing. The CNS modulates hand-pen contact force synergies for preparation and conclusion of circle drawing, respectively. Published by Elsevier Ltd.

  8. Systematic comparison of the use of annular and Zernike circle polynomials for annular wavefronts.

    Science.gov (United States)

    Mahajan, Virendra N; Aftab, Maham

    2010-11-20

    The theory of wavefront analysis of a noncircular wavefront is given and applied for a systematic comparison of the use of annular and Zernike circle polynomials for the analysis of an annular wavefront. It is shown that, unlike the annular coefficients, the circle coefficients generally change as the number of polynomials used in the expansion changes. Although the wavefront fit with a certain number of circle polynomials is identically the same as that with the corresponding annular polynomials, the piston circle coefficient does not represent the mean value of the aberration function, and the sum of the squares of the other coefficients does not yield its variance. The interferometer setting errors of tip, tilt, and defocus from a four-circle-polynomial expansion are the same as those from the annular-polynomial expansion. However, if these errors are obtained from, say, an 11-circle-polynomial expansion, and are removed from the aberration function, wrong polishing will result by zeroing out the residual aberration function. If the common practice of defining the center of an interferogram and drawing a circle around it is followed, then the circle coefficients of a noncircular interferogram do not yield a correct representation of the aberration function. Moreover, in this case, some of the higher-order coefficients of aberrations that are nonexistent in the aberration function are also nonzero. Finally, the circle coefficients, however obtained, do not represent coefficients of the balanced aberrations for an annular pupil. The various results are illustrated analytically and numerically by considering an annular Seidel aberration function.

  9. Improving American Healthcare Through "Clinical Lab 2.0": A Project Santa Fe Report.

    Science.gov (United States)

    Crawford, James M; Shotorbani, Khosrow; Sharma, Gaurav; Crossey, Michael; Kothari, Tarush; Lorey, Thomas S; Prichard, Jeffrey W; Wilkerson, Myra; Fisher, Nancy

    2017-01-01

    Project Santa Fe was established both to provide thought leadership and to help develop the evidence base for the valuation of clinical laboratory services in the next era of American healthcare. The participants in Project Santa Fe represent major regional health systems that can operationalize laboratory-driven innovations and test their valuation in diverse regional marketplaces in the United States. We provide recommendations from the inaugural March 2016 meeting of Project Santa Fe. Specifically, in the transition from volume-based to value-based health care, clinical laboratories are called upon to provide programmatic leadership in reducing total cost of care through optimization of time-to-diagnosis and time-to-effective therapeutics, optimization of care coordination, and programmatic support of wellness care, screening, and monitoring. This call to action is more than working with industry stakeholders on the basis of our expertise; it is providing leadership in creating the programs that accomplish these objectives. In so doing, clinical laboratories can be effectors in identifying patients at risk for escalation in care, closing gaps in care, and optimizing outcomes of health care innovation. We also hope that, through such activities, the evidence base will be created for the new value propositions of integrated laboratory networks. In the very simplest sense, this effort to create "Clinical Lab 2.0" will establish the impact of laboratory diagnostics on the full 100% spend in American healthcare, not just the 2.5% spend attributed to in vitro diagnostics. In so doing, our aim is to empower regional and local laboratories to thrive under new models of payment in the next era of American health care delivery.

  10. End of the line to build a circle

    CERN Multimedia

    2006-01-01

    The installation of the cryogenic distribution line in the LHC tunnel is finally finished! All the sectors have undergone pressure and helium leak tests at room temperature, and one complete sector was cold tested in cryogenic conditions. Some of the QRL team in UJ22 of the LHC tunnel, where the last sector of the cryogenic distribution line was installed.It must have been a joyous moment in UJ22 of the LHC tunnel (near Point 2, Saint Genis Pouilly) on 19 October. This was where the last external weld of the cryogenic distribution line, also known as QRL, was made, thus completing the full distribution ring. The QRL is a circle built in 8 sectors, each approximately 3 km in length. It will circulate helium in liquid and gas phases, at different temperatures and pressures, to provide the cryogenic conditions for the superconducting magnets in the LHC tunnel. The last sector installed (sector 1-2) passed the pressure and helium leak tests at room temperature on 28 October. As part of the warm test, each sector...

  11. Is "circling" behavior in humans related to postural asymmetry?

    Directory of Open Access Journals (Sweden)

    Emma Bestaven

    Full Text Available In attempting to walk rectilinearly in the absence of visual landmarks, persons will gradually turn in a circle to eventually become lost. The aim of the present study was to provide insights into the possible underlying mechanisms of this behavior. For each subject (N = 15 six trajectories were monitored during blindfolded walking in a large enclosed area to suppress external cues, and ground irregularities that may elicit unexpected changes in direction. There was a substantial variability from trial to trial for a given subject and between subjects who could either veer very early or relatively late. Of the total number of trials, 50% trajectories terminated on the left side, 39% on the right side and 11% were defined as "straight". For each subject, we established a "turning score" that reflected his/her preferential side of veering. The turning score was found to be unrelated to any evident biomechanical asymmetry or functional dominance (eye, hand.... Posturographic analysis, used to assess if there was a relationship between functional postural asymmetry and veering revealed that the mean position of the center of foot pressure during balance tests was correlated with the turning score. Finally, we established that the mean position of the center of pressure was correlated with perceived verticality assessed by a subjective verticality test. Together, our results suggest that veering is related to a "sense of straight ahead" that could be shaped by vestibular inputs.

  12. Pervasive horizontal transfer of rolling-circle transposons among animals.

    Science.gov (United States)

    Thomas, Jainy; Schaack, Sarah; Pritham, Ellen J

    2010-01-01

    Horizontal transfer (HT) of genes is known to be an important mechanism of genetic innovation, especially in prokaryotes. The impact of HT of transposable elements (TEs), however, has only recently begun to receive widespread attention and may be significant due to their mutagenic potential, inherent mobility, and abundance. Helitrons, also known as rolling-circle transposons, are a distinctive subclass of TE with a unique transposition mechanism. Here, we describe the first evidence for the repeated HT of four different families of Helitrons in an unprecedented array of organisms, including mammals, reptiles, fish, invertebrates, and insect viruses. The Helitrons present in these species have a patchy distribution and are closely related (80-98% sequence identity), despite the deep divergence times among hosts. Multiple lines of evidence indicate the extreme conservation of sequence identity is not due to selection, including the highly fragmented nature of the Helitrons identified and the lack of any signatures of selection at the nucleotide level. The presence of horizontally transferred Helitrons in insect viruses, in particular, suggests that this may represent a potential mechanism of transfer in some taxa. Unlike genes, Helitrons that have horizontally transferred into new host genomes can amplify, in some cases reaching up to several hundred copies and representing a substantial fraction of the genome. Because Helitrons are known to frequently capture and amplify gene fragments, HT of this unique group of DNA transposons could lead to horizontal gene transfer and incur dramatic shifts in the trajectory of genome evolution.

  13. Gold Nanowire Based Electrical DNA Detection Using Rolling Circle Amplification

    Science.gov (United States)

    2014-01-01

    We present an electrical sensor that uses rolling circle amplification (RCA) of DNA to stretch across the gap between two electrodes, interact with metal nanoparticle seeds to generate an electrically conductive nanowire, and produce electrical signals upon detection of specific target DNA sequences. RCA is a highly specific molecular detection mechanism based on DNA probe circularization. With this technique, long single-stranded DNA with simple repetitive sequences are produced. Here we show that stretched RCA products can be metalized using silver or gold solutions to form metal wires. Upon metallization, the resistance drops from TΩ to kΩ for silver and to Ω for gold. Metallization is seeded by gold nanoparticles aligned along the single-stranded DNA product through hybridization of functionalized oligonucleotides. We show that combining RCA with electrical DNA detection produces results in readout with very high signal-to-noise ratio, an essential feature for sensitive and specific detection assays. Finally, we demonstrate detection of 10 ng of Escherichia coli genomic DNA using the sensor concept. PMID:24433087

  14. Ciclicidade e kinesis em Circles de Luciano Berio

    Directory of Open Access Journals (Sweden)

    Silvio Ferraz

    2011-12-01

    Full Text Available Este artigo realiza uma leitura da primeira canção de Circles, para voz feminina, percussão e harpa, de Luciano Berio, composta sobre poema de e.e.cummings. O principal objetivo é o de demonstrar como o compositor, através da recorrência de fragmentos, dá consistência a uma sobreposição de elementos sem necessária conexão estrutural. A análise toma por ferramenta o conceito de Ritornelo, desenvolvido por Gilles Deleuze e Félix Guattari em Mil Platôs, sobretudo as noções de código e consistência. Tal ferramenta visa compreender uma prática composicional em que as conexões de elementos e ideias se deem no plano imanente da escuta sem a intervenção de conexões de ordem abstrata, seja formal ou linguística. Por outro lado, a imanência da ideia de ciclos que tomamos por base para esta análise também se conjuga com a ideia de kinesis apontada por Ivanka Stoïanova na obra de Luciano Berio.

  15. Vascular remodeling of the circle of Willis in moyamoya disease.

    Science.gov (United States)

    Mikami, Takeshi; Noshiro, Shouhei; Komatsu, Katsuya; Miyata, Kei; Akiyama, Yukinori; Wanibuchi, Masahiko; Mikuni, Nobuhiro

    2015-10-01

    A positive (outward) remodelling pattern in patients with typical atherosclerotic disease was recognised using magnetic resonance imaging (MRI). In this report, the outer diameter of the circle of Willis was evaluated in patients with moyamoya disease, and its remodelling pattern was verified. A total of 18 consecutive patients with moyamoya disease were included in this analysis. The diameter of the terminal portion of the internal carotid artery (ICA) (C1), proximal portion of the middle cerebral artery (MCA) (M1) and proximal portion of the anterior cerebral artery (A1) was evaluated using fast imaging employing steady-state acquisition (FIESTA) imaging. The outer diameter was estimated using these images, and compared with the control group, and the correlation with magnetic resonance angiography (MRA) scores was calculated for patients with moyamoya disease. The mean diameter of the moyamoya patient group on FIESTA was significantly lower than that of the control group in the C1, M1 and A1 (P moyamoya disease MRA score (y = (0.53x+2.31; R = 0.72), whereas the C1 diameter on the FIESTA image showed only a weak correlation (y = (0.16x+2.47; R = 0.21). We found that the outer diameter of all the vessels around the C1 was generally reduced in patients with moyamoya disease. Diameter of the MCA especially decreases as the disease progresses, similar to the negative (constrictive) remodelling pattern.

  16. Clinical analysis and classification of dark eye circle.

    Science.gov (United States)

    Huang, Yau-Li; Chang, Shyue-Luen; Ma, Lih; Lee, Mei-Ching; Hu, Sindy

    2014-02-01

    Dark eye circle (DEC) is a common problem that usually lacks detailed classification in the etiology and structural variations. A newly-developed DEC Assessment Score using Wood's lamp and ultrasonogram will provide a more precise evaluation of DEC for improving treatment results. Sixty-five cases, including eight males and 57 females with a mean age of 38.9 years, were enrolled. DEC were classified into pigmented (brown), vascular (blue to purple), structural, and mixed type by Wood's lamp and ultrasonogram. A scoring system with nine parameters, including brown hue, pigmented lesions, blue/pink/purple hue, periorbital puffiness, shadow hue, infraorbital palpebral bags, infraorbital grooves, blepharoptosis, and skin type, was used for clinical evaluation. Pigmented, vascular, structural, and mixed types of DEC represented 5%, 14%, 3%, and 78%, respectively. Thirty-three cases with periorbital puffiness were found to have higher "pre-septal thickness" than those of 20 controlled cases (P = 0.032). Fourteen patients with infraorbital palpebral bags were proved to have protruded retroseptal fat pads by ultrasonography. Pigmentation and vascular and structural components may play important roles in DEC. Detailed classification of DEC types will access physicians in the decision of appropriate therapeutic modalities. © 2013 The International Society of Dermatology.

  17. La granitula de la Santa du Niolu

    Directory of Open Access Journals (Sweden)

    Davia Benedetti

    2012-01-01

    Full Text Available Abstract – IT   Quale modalità sociale fonda la pratica di una danza rituale pre-cristiana, la granitula, in occasione della festa annuale della Santa nel Niolo, in Corsica? Questa danza vi perdura nel quadro di un pellegrinaggio istituito sulla base di un racconto leggendario, in commemorazione della natività della Vergine. Essa è associata a una cerimonia religiosa e a una fiera. Consiste in una marcia a spirale a doppio senso, scandita da canti e condotta dai membri delle confraternite. La granitula ha rilievo nel campo etno-scenologico con la trasposizione corporea di immagini del labirinto, dell'origine e del sé. Simboleggia il corpo sociale corso e il suo senso d'appartenenza regionale e paesana. Coloro che la eseguono entrano in coesione con la comunità corsa. Fanno corpo con essa per proiettare nel vivere comune della società la loro assicurazione di uscita da ogni labirinto grazie a una prassi solidare, al rinserrare dei legami comunitari e a un adattamento identitario ai cambiamenti. Abstract – FR Quelle sociabilité fonde la pratique d’une danse rituelle antechrétienne, la granitula, lors de la fête annuelle de la Santa dans le Niolu, en Corse? Cette danse y perdure dans le cadre d’un pèlerinage établi sur un récit légendaire, en commémoration de la nativité de la Vierge. Elle est associée à une cérémonie religieuse catholique et à une foire. Elle consiste en une marche spiralée à double sens, scandée par des chants et exécutée par les membres des confréries. La granitula relève du champ de l’ethnoscénologie avec une mise en corps des figures du labyrinthe, de l’origine et du même. Elle symbolise le corps social corse et ses sentiments d’appartenance régionale et villageoise. Ses exécutants entrent en cohésion avec la communauté corse. Ils font corps avec elle pour projeter dans le vivre ensemble sociétal leur assurance de la sortie de tout labyrinthe par une pratique des solidarit

  18. Unidirectional ultraviolet whispering gallery mode lasing from floating asymmetric circle GaN microdisk

    Science.gov (United States)

    Zhu, G. Y.; Qin, F. F.; Guo, J. Y.; Xu, C. X.; Wang, Y. J.

    2017-11-01

    Floating asymmetric circle and circle GaN microdisks are fabricated by using standard semiconductor techniques. Unidirectional ultraviolet whispering gallery mode lasing results from floating asymmetric circle GaN microdisks under optical pumping conditions at room temperature. The characteristics of the unidirectional whispering gallery mode lasing, including the lasing emission direction, threshold, emission intensity, and lasing mode number, are studied. A 2D finite difference time domain simulation on optical field distribution confirmed the resonance mechanism of whispering gallery mode lasing. This work is crucial for enhancing collection efficiency and facilitating the coupling of the electronic and photonic devices.

  19. Classification and equivariant cohomology of circle actions on 3d manifolds

    Science.gov (United States)

    He, Chen

    2017-10-01

    The classification of Seifert manifolds was given in terms of numeric data by Seifert (1933), and then generalized by Raymond (1968) and Orlik and Raymond (1968) to circle actions on closed 3d manifolds. In this paper, we further generalize the classification to circle actions on 3d manifolds with boundaries by adding a numeric parameter and a graph of cycles. Then, we describe the rational equivariant cohomology of 3d manifolds with circle actions in terms of ring, module and vector-space structures. We also compute equivariant Betti numbers and Poincaré series for these manifolds and discuss the equivariant formality.

  20. A Context for Professional Learning: Teacher Candidates in Intergenerational Literature Circles

    Directory of Open Access Journals (Sweden)

    Marg Epp

    2009-01-01

    Full Text Available Our findings indicate that intergenerational literature circles were sites where multi-layered learning took place for teacher candidates. These adult learners developed a deeper understanding of and how children read, learn concepts and respond to text and they enhanced their understandings of multiple perspectives. Teacher candidates indicated that co-learning in the context of a literature circle helped them in their transformation into professional teachers as they experienced and reflected on learners, learning and teaching/learning strategies. Many revised their definitions of ‘teacher’ as a result of their experiences in intergenerational literature circles.

  1. Santa Fe Alliance for Science: The First Eight Years

    Science.gov (United States)

    Eisenstein, Robert A.

    2013-04-01

    The Santa Fe Alliance for Science (SFAFS) was founded in May, 2005. SFAFS exists to provide assistance in K-14 math and science education in the greater Santa Fe area. It does this via extensive programs (1) in math and science tutoring at Santa Fe High School, Santa Fe Community College and to a lesser degree at other schools, (2) science fair advising and judging, (3) its ``Santa Fe Science Cafe for Young Thinkers'' series, (4) a program of professional enrichment for K-12 math and science teachers, and (5) a fledging math intervention program in middle school math. Well over 150 STEM professionals, working mostly as volunteers, have contributed since our beginning. Participation by students, parents and teachers has increased dramatically over the years, leading to much more positive views of math and science, especially among elementary school students and teachers. Support from the community and from local school districts has been very strong. I will present a brief status report on SFAFS activities, discuss some of the lessons learned along the way and describe briefly some ideas for the future. More information can be found at the SFAFS website, www.sfafs.org.

  2. Santa Elena. Ready to reshape its transport energy matrix

    Energy Technology Data Exchange (ETDEWEB)

    Moreano, Hernan [Universidad Estatal Peninsula de Santa Elena (Ecuador). Inst. de Investigacion Cientifica y Desarrollo Tecnologico (INCYT)

    2012-07-01

    The renewable energy issue opens the door to an ambient of opportunities. Santa Elena, one of the coastal provinces of Ecuador has the chance to go from a fossil fuel energy culture to a new energy scheme based on the use of environmental friendly fuels like natural gas and other renewable energy carriers like hydrogen. The marginal production of oil and natural gas from the Gustavo Galindo Velasco field and the updated gas reserves from the Gulf of Guayaquil make it possible. Infrastructure for natural gas production and distribution for vehicles is almost ready and any of the three refineries can generate hydrogen from natural gas. This provides the opportunity to reshape the Santa Elena transport energy matrix, where vehicles can burn natural gas and inter country buses can work with hydrogen. Traditional Fishing boats can be fitted with hydrogen storage and fuel systems later on. Santa Elena should face this challenge through a joint effort of public and private parties. Santa Elena State University and its partners as a focus point to create: The Campus of Energy Knowledge, where research, science and technology will serve companies that work in the energy business with a strong synergy, which will create jobs for the Santa Elena people. (orig.)

  3. Deposição tecidual em cordeiros Santa Inês, ½ Dorper-Santa Inês e ½ White Dorper-Santa Inês avaliados por ultrassonografia Tissue deposition in Santa Inês, ½ Dorper-Santa Inês and ½ White Dorper-Santa Inês lambs assessed by ultrasonography

    Directory of Open Access Journals (Sweden)

    Franciane Barbiéri Dias

    2011-09-01

    Full Text Available Foram utilizados 36 cordeiros machos não castrados, dos quais, 12 de cada grupo genético: Santa Inês, ½ Dorper-Santa Inês e ½ White Dorper-Santa Inês, mantidos em confinamento. Realizaram-se pesagens e avaliações semanais na região do lombo entre a 12ª e 13ª costelas, por ultrassonografia, para obtenção da espessura de gordura subcutânea e profundidade do músculo Longissimus lumborum. Para a verificação de diferenças no desenvolvimento da espessura de gordura subcutânea e profundidade do músculo Longissimus lumborum, em função dos dias em confinamento entre os grupos, foi assumida distribuição normal em análise Bayesiana. A equação obtida para o ganho de peso em função dos dias em confinamento apresentou coeficiente angular (b1 maior para ½ Dorper-Santa Inês (0,26 e menor para o Santa Inês (0,22. O coeficiente angular (b1 da espessura de gordura subcutânea, em função dos dias em confinamento foi maior para os cordeiros ½ Dorper-Santa Inês (0,038 e ½ White Dorper-Santa Inês (0,039 comparados ao Santa Inês (0,037, o que expressa maior precocidade para esta característica nos cordeiros cruzados. A avaliação da profundidade do músculo Longissimus lumborum indicou maior taxa (b1 de deposição muscular para os cordeiros Santa Inês (0,072 comparado aos ½ Dorper-Santa Inês (0,057 e ½ White Dorper-Santa Inês (0,057, no entanto, a deposição inicial de músculos foi maior nos cordeiros cruzados. Os cordeiros cruzados apresentam desenvolvimento mais precoce e podem ser abatidos com mais músculos e mais gordura em menor tempo.Thirty six male lambs, not castrated, twelve of each genetic group: Santa Inês, ½ Dorper-Santa Inês and ½ White Dorper-Santa Inês, were used, and raised in feedlot. Weight measurements and assessments in the region of the loin, between the 12th and 13th ribs, by ultrasound, were conducted weekly, to obtain the subcutaneous fat thickness and the Longissimus lumborum muscle depth

  4. Using Quality Circles in the Classroom To Improve Student Learning and Satisfaction.

    Science.gov (United States)

    Cullen, Janice A.; Johnston, Linda W.

    1999-01-01

    A quality circle of four nursing students (student management team) represented class concerns to faculty at biweekly meetings. Students felt it increased their sense of course ownership and created a positive perception of faculty concern for their learning. (SK)

  5. Physicians-pharmacists quality circles: shared responsibility of the freedom of prescription

    National Research Council Canada - National Science Library

    Bugnon, O; Jotterand, S; Niquille Charrière, A; Ruggli, M; Herzig, L

    2012-01-01

    Physicians-pharmacists quality circles (PPQCs) were introduced in 1997-98 by visionary healthcare practitioners of the French-speaking part of Switzerland with the aim to improve the quality of drug prescription...

  6. Rich services in interoperable Learning Designs: can the circle be squared?

    NARCIS (Netherlands)

    Griffiths, David

    2009-01-01

    Griffiths, D. (2009). Rich services in interoperable Learning Designs: Can the circle be squared?. Presented at Opening Up Learning Design, European LAMS and Learning Design Conference 2009. July, 6-9, 2009, Milton Keynes, United Kingdom.

  7. College geometry an introduction to the modern geometry of the triangle and the circle

    CERN Document Server

    Altshiller-Court, Nathan

    2007-01-01

    The standard university-level text for decades, this volume offers exercises in construction problems, harmonic division, circle and triangle geometry, and other areas. 1952 edition, revised and enlarged by the author.

  8. Geologic Provinces of the Circum-Arctic, 2008 (north of the Arctic Circle)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This shapefile includes arcs and polygons that describe U.S. Geological Survey defined 33 geologic provinces of the Circum-Arctic (north of the Arctic Circle). Each...

  9. Work with gifted students – Successfulness of study circles in primary schools

    Directory of Open Access Journals (Sweden)

    Vilma Malečkar

    2013-07-01

    Full Text Available The article presents informal learning in study circles, organized for gifted pupils in primary schools. The principles underlying the concept of study circles (learners' participation in the selection of the contents and organization of work and learning, identification and realization of educational and action plans, etc. form a solid basis for work with the children who wish to be more active and to take self-initiative in their learning. Study circles, which incorporate democratic learning principles, are a welcome way of learning. They supplement the mandatory primary school curricula and motivate learners in their quest of knowledge, which they are willing to share in study circles at school and in the wider community.

  10. Correlation between leukoaraiosis volume and circle of Willis variants.

    Science.gov (United States)

    Saba, Luca; Raz, Eytan; Fatterpekar, Girish; Montisci, Roberto; di Martino, Michele; Bassareo, Pier Paolo; Piga, Mario

    2015-01-01

    The Circle of Willis (COW) is the main collateral system between the bilateral carotid systems and the posterior circulation. COW normal variants are encountered in up to 62% of subjects. We hypothesize that, in patients with carotid artery stenosis, the presence of COW variants is a risk factor for leukoaraiosis. Forty-seven patients (mean age 72.1 ± 9 years, males = 39) with carotid artery stenosis admitted for carotid endarterectomy were included and underwent an admission brain MRI/MRA. Two neuroradiologists evaluated the COW variants. FLAIR-leukoaraiosis lesion-volume was performed using a semiautomated segmentation technique. Mann-Whitney and Pearson correlations were conducted to identify the correlation between the FLAIR-leukoaraiosis lesion-volume and the COW variants. ROC analysis was performed to evaluate the AUC of FLAIR-leukoaraiosis lesion-volume and presence/absence of COW variants. Pearson correlation demonstrated that the leukoaraiosis lesion-volume is significantly associated with the COW variants number (rho = .358, P = .0215). When patients were dicotomized in two subgroups, with and without COW variants, the lesion-volume was significantly higher in the variants group (P = .0405). The ROC curve analysis showed an AUC of .688 (SE = .083, 95%CI = .525-.823) with a statistically significant P = .0225, between the presence of COW variants and the FLAIR-leukoaraiosis lesion-volume. The presence and the number of COW variants are associated with a higher leukoaraiosis volume in patients with significant internal carotid artery stenosis. Copyright © 2014 by the American Society of Neuroimaging.

  11. Biocalcarenites as construction materials in Santa Marina de Aguas Santas Church at Cordoba, Spain

    Directory of Open Access Journals (Sweden)

    Meroño, J. E.

    2009-03-01

    Full Text Available This study consisted in characterizing the materials used to build Santa Marina de Aguas Santas Church at Cordoba and locating the original quarries. The techniques used in the lithological and chemical characterization included XRD, petrographic microscopy and electron dispersive scanning microscopy. The chemical index of weathering (CIW was used to quantify the state of stone decay. The lithology and different types of alterations observed were mapped. A comparison of the material on the building to ancient quarries identified “Naranjo” as the possible site where the stone was originally quarried.Para la caracterización litológica y determinación del grado de alteración de los materiales pétreos se han empleado las siguientes técnicas: difracción de rayos X (método del polvo, microscopía petrográfica (sobre lámina delgada y microscopía de barrido con EDS (energía dispersiva de rayos X, para determinar la composición química. El estado de degradación del material pétreo se ha cuantificado a partir del índice químico de alteración (CIW. Se han realizado cartografías sobre la fachada oeste: a de las litologías presentes y b de los diferentes tipos de alteración observados. La comparación de muestras del edificio con las de antiguas canteras ha permitido identificar la del Naranjo como la posible cantera de origen.

  12. Seafloor character from air-photo data-Santa Barbara Channel

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Seafloor character was derived from interpretations of aerial photograph-derived kelp-distribution data available for Santa Cruz Island in the Santa Barbara Channel,...

  13. Local smoke-free policy development in Santa Fe, Argentina

    Science.gov (United States)

    Glantz, Stanton A

    2010-01-01

    Objective To describe the process of approval and implementation of a comprehensive smoke-free law in the province of Santa Fe, Argentina, between 2005 and 2009. Methods Review of the Santa Fe smoke-free legislation, articles published in local newspapers and documentation on two lawsuits filed against the law, and interviews with key individuals in Santa Fe. Results Efforts to implement smoke-free policies in Santa Fe began during the 1990s without success, and resumed in 2005 when the provincial Legislature approved the first 100% smoke-free subnational law in Argentina. There was no strong opposition during the discussions within the legislature. As in other parts of the world, pro-tobacco industry interests attempted to block the implementation of the law using well known strategies. These efforts included a controversy media campaign set up, the creation of a hospitality industry association and a virtual smokers' rights group, the introduction of a counterproposal seeking modification of the law, the challenge of the law in the Supreme Court, and the proposal of a weak national bill that would ‘conflict’ with the subnational law. Tobacco control advocates sought media attention as a strategy to protect the law. Conclusions Santa Fe is the first subnational jurisdiction in Latin America to have enacted a comprehensive smoke-free policy following the recommendations of the World Health Organization (WHO) Framework Convention on Tobacco Control. After 3 years of implementation, pro-tobacco industry forces failed to undermine the law. Other subnational jurisdictions in Argentina, as well as in Mexico and Brazil are following the Santa Fe example. PMID:19955534

  14. [Basic tenets for quality circles in North Rhine Medical Service of Public Health Insurance].

    Science.gov (United States)

    Lauven, G; Becker, H; Euteneuer, H; Greven, T; Grossgarten, K H; Kost, H G; Niessen, B; Pichlo, H G; Schöngart, C; Uphaus, W; Vogt, R; Hufer, H; Müller-Held, W

    2000-01-01

    The Medical Advisory Service of the Health Insurance in the area of the Northern Rhine (MDK Nordrhein) has set up an internal concept for quality management since 1998. This concept includes the installation and performance of quality circles. Staff members were internally qualified as "presenters". They worked out principles for quality circles of the MDK North Rhine which were implemented as binding basic rules by the managing conference of the MDK. The principles will be presented in detail.

  15. Configurations of the circle of Willis: a computed tomography angiography based study on a Polish population.

    Science.gov (United States)

    Klimek-Piotrowska, W; Kopeć, M; Kochana, M; Krzyżewski, R M; Tomaszewski, K A; Brzegowy, P; Walocha, J

    2013-11-01

    The aim of the study was to investigate the distribution of the circle of Willis variants in Polish population by means of computed tomography angiography (CTA). The results were then analysed and compared with another study that used similar methods but that was carried out on an ethnically distinct population. Patients presenting with intracranial pathology were excluded from the initial study population. In total, 250 CTA belonging to 129 female and 121 male patients were reviewed. A modified classification system of the circle was proposed, which took into consideration the anterior and the posterior aspects of the circle individually. The typical variant of Willis's circle occurred in 16.80% of cases. The anterior and the posterior portions of the circle were normal in 47.20% and 26.80% of the patients respectively. As for the anterior part, lack of the anterior communicating artery was the most frequent abnormality (22.80%). Bilateral absence of posterior communicating arteries was the most common anomaly in the posterior part of the circle (29.20%). This type of anomaly was also the most common, when taking into consideration the entire circle (12.00%). There were statistically significant differences between the age groups and genders when considering the occurrence of an incomplete circle. Overall, a substantial proportion of patients manifested clinically important variants that were incapable of providing collateral circulation. Comparison with other imaging-based and cadaveric studies revealed noticeable differences, that may have resulted from the variable technical features of other studies or other factors such as the ethnical origins of the studied populations.

  16. The role of circle of Willis anomalies in cerebral aneurysm rupture.

    Science.gov (United States)

    Lazzaro, Marc A; Ouyang, Bichun; Chen, Michael

    2012-01-01

    Limited data exist to guide patient selection for preventive treatment of unruptured cerebral aneurysms. Cerebral aneurysms have been associated with circle of Willis anomalies but whether this association is also related to aneurysm rupture is not known. The occurrence of cerebral aneurysm rupture when a circle of Willis anomaly was present or absent was compared. Patients admitted over a 2 year period with a diagnosis of a cerebral aneurysm and an anterior communicating artery (ACoA) or posterior communicating artery (PCoA) aneurysm were included in the analysis. Brain vascular imaging was reviewed for aneurysm size, morphology and presence of circle of Willis anomaly. Relevant medical history and demographics were obtained from the medical records. Of the 113 patients with ACoA or PCoA aneurysms, 85 (75.2%) cases were ruptured. There were 49 (43.4%) PCoA aneurysms and 64 (56.6%) ACoA aneurysms. Mean aneurysm size was 5.65 mm (SD 3.31). A circle of Willis anomaly was identified in 46 (40.7%) of all patients. Circle of Willis anomalies were present in 38 (46.9%) ruptured aneurysm cases and eight (29.6%) unruptured aneurysm cases. Multivariate analysis revealed a higher risk of aneurysm rupture when a circle of Willis anomaly was present (p=0.0245, OR 3.72 (CI 1.18 to 11.66)). This series shows that circle of Willis anomalies are more commonly found in ruptured as opposed to unruptured cerebral aneurysms of the anterior and posterior communicating arteries. The presence of a circle of Willis anomaly may be an important characteristic for selecting patients for preventive aneurysm treatment.

  17. Occlusion of the circle of Willis. Diagnosis by 3D-time of flight MR angiography

    Energy Technology Data Exchange (ETDEWEB)

    Komatsumoto, Satoru; Ushioda, Takakazu; Nara, Masaharu [Ashikaga Red Cross Hospital, Tochigi (Japan)

    1996-08-01

    Magnetic resonance angiograms (MRA) were studied in 7 cases of occlusion of the circle of Willis. MRA successfully demonstrated the vascular obstructions and moyamoya vessels with a positive correlation to the angiographic findings. Leptomeningeal and transdural collateral vessels were also identified with MRA. As MRA is not invasive, it promises to become a valuable alternature to conventional angiography in the diagnosis of occlusion of the circle of Willis. (author)

  18. On a Theorem of Szegoe on Univalent Convex Maps of the Unit Circle.

    Science.gov (United States)

    1984-02-01

    fleit) -x(t) + iy(t) traces out a circle C having the interval of reals (1/(l + X), 1/(I - A)] as diameter and therefore the radius (4.5) II 2...the circle C and that its curvature Xn(tlYn(t )- yn(t )x,-t) (n)2 + (t)2)3/2 (x’(t)2 + Y converges uniformly in t, as n + , to the curvature 1/R of C

  19. La Santa Muerte y la cultura de los derechos humanos

    OpenAIRE

    Pilar Castells Ballarín

    2008-01-01

    Este artículo tiene su origen en la siguiente pregunta: ¿qué valores se construyen en el culto a La Santa Muerte y cómo afectan el contexto socio-simbólico de los derechos humanos? Reflexiono el culto a La Santa Muerte como un fenómeno social con dos pautas: 1. Una original expresión estratégica para enfrentar la precariedad y muerte social (como efectos indeseados del neoliberalismo); 2. Una expresión que confirma la cultura del miedo como instrumento de control social.

  20. Nesh Dhillon: Manager, Santa Cruz County Community Farmers' Markets

    OpenAIRE

    Rabkin, Sarah

    2010-01-01

    Nesh (pronounced “Naysh”) Dhillon is operations manager for the Santa Cruz Community Farmers’ Markets, which include locations in downtown and Westside Santa Cruz, Live Oak, Felton, and (added in 2009, after this oral history was recorded) Scotts Valley. All operate open year-round except the Felton market, which is open May through October. Dhillon’s parents both grew up poor—his father in a farming family in northern India, his mother in rural Oregon—but with a preference for fresh...

  1. La Santa Muerte y la cultura de los derechos humanos

    Directory of Open Access Journals (Sweden)

    Pilar Castells Ballarín

    2008-06-01

    Full Text Available Este artículo tiene su origen en la siguiente pregunta: ¿qué valores se construyen en el culto a La Santa Muerte y cómo afectan el contexto socio-simbólico de los derechos humanos? Reflexiono el culto a La Santa Muerte como un fenómeno social con dos pautas: 1. Una original expresión estratégica para enfrentar la precariedad y muerte social (como efectos indeseados del neoliberalismo; 2. Una expresión que confirma la cultura del miedo como instrumento de control social.

  2. Prevalência de autismo em Santa Catarina

    OpenAIRE

    Ferreira, Evelise Cristina Vieira

    2008-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde. Programa de Pós-Graduação em Saúde Pública. Objetivos: Estimar a prevalência de autismo por região de residência, sexo e idade, e avaliar os critérios de diagnóstico de autismo, comparando-os aos critérios do DSM IV (1995), no estado de Santa Catarina no ano de 2006. Metodologia: Trata-se de um estudo epidemiológico populacional, com delineamento transversal, descritivo, que utilizou dados sec...

  3. Fabrication and characteristics of thin disc piezoelectric transformers based on piezoelectric buzzers with gap circles.

    Science.gov (United States)

    Chang, Kuo-Tsai; Lee, Chun-Wei

    2008-04-01

    This paper investigates design, fabrication and test of thin disc piezoelectric transformers (PTs) based on piezoelectric buzzers with gap circles at different diameters of the gap circles. The performance test is focused on characteristics of voltage gains, including maximum voltage gains and maximum-gain frequencies, for each piezoelectric transformer under different load conditions. Both a piezoelectric buzzer and a gap circle on a silver electrode of the buzzer are needed to build any type of the PTs. Here, the gap circle is used to form a ring-shaped input electrode and a circle-shaped output electrode for each piezoelectric transformer. To do so, both structure and connection of a PT are first expressed. Then, operating principle of a PT and its related vibration mode observed by a carbon-power imaging technique are described. Moreover, an experimental setup for characterizing each piezoelectric transformer is constructed. Finally, effects of diameters of the gap circles on characteristics of voltage gains at different load resistances are discussed.

  4. A Voyage around the Recumbent Stone Circles of North-East Scotland

    Science.gov (United States)

    Henty, Liz

    2015-05-01

    This paper details new archaeoastronomical research undertaken at the Recumbent Stone Circles (RSCs) of Scotland. Research to date has concentrated on the recumbent arrangement and the major theorists such as Thom, Ruggles and Burl, proposed that the recumbent and pillars are aligned to the lunar standstills or the passage of the moon over the recumbent. This research took a different voyage around the circles, which included checking all the stones of the circle for solar and stellar alignments as well as lunar alignments. It looks at nine RSCs, using both new plans drawn up by RCAHMS and plans published by Thom. The research was prompted by preliminary research, reported on at SEAC 2010, which detailed fieldwork completed at three sites. Because of the earlier focus on the recumbent, the RSCs have generally been interpreted in terms of a lunar narrative. By contrast, the aims of this research were to examine the circle in its entirety examining each circle stone for possible solar, lunar and stellar alignments using the dates of 2500 BC and 2000 BC. The results for all the circle stones showed that there were just as many solar as lunar alignments and that some stellar alignments may have been important symbolically.

  5. A multidetector CT angiography study of variations in the circle of Willis in a Chinese population.

    Science.gov (United States)

    Li, Qi; Li, Jialun; Lv, Fajin; Li, Kewei; Luo, Tianyou; Xie, Peng

    2011-03-01

    The circle of Willis is a major collateral circulation that has an important role in ischemic events. The purpose of our study was to investigate the collateral circulation in a Chinese population with 64-section multidetector CT angiography (CTA). A total of 170 patients who underwent 64-section CT angiography at The First Affiliated Hospital of Chongqing Medical University were included in our study. The morphological variations in the anterior and posterior circle of Willis were assessed in each patient. A total of 160 patients were included in the final analysis, of whom 126 (79%) demonstrated a complete anterior circle of Willis, and 50 (31%) had a complete posterior circle of Willis. A complete circle of Willis was seen in 43 of 160 participants (27%). A fetal-type posterior circle of Willis was seen in 15 (9.4%) patients. This is the first report of a CTA study of collateral circulation in a Chinese population. A higher prevalence of compromised posterior collaterals was observed in this Chinese population compared to Western and Japanese populations. Copyright © 2010 Elsevier Ltd. All rights reserved.

  6. Component analysis and synthesis of dark circles under the eyes using a spectral image

    Science.gov (United States)

    Akaho, Rina; Hirose, Misa; Ojima, Nobutoshi; Igarashi, Takanori; Tsumura, Norimichi

    2017-02-01

    This paper proposes to apply nonlinear estimation of chromophore concentrations: melanin, oxy-hemoglobin, deoxyhemoglobin and shading to the real hyperspectral image of skin. Skin reflectance is captured in the wavelengths between 400nm and 700nm by hyperspectral scanner. Five-band wavelengths data are selected from skin reflectance. By using the cubic function which obtained by Monte Carlo simulation of light transport in multi-layered tissue, chromophore concentrations and shading are determined by minimize residual sum of squares of reflectance. When dark circles are appeared under the eyes, the subject looks tired and older. Therefore, woman apply cosmetic cares to remove dark circles. It is not clear about the relationship between color and chromophores distribution in the dark circles. Here, we applied the separation method of the skin four components to hyperspectral image of dark circle, and the separated components are modulated and synthesized. The synthesized images are evaluated to know which components are contributed into the appearance of dark circles. Result of the evaluation shows that the cause of dark circles for the one subject was mainly melanin pigmentation.

  7. Application of probability circles analysis to the construction of calibration curves for infra red spectroscopy.

    Science.gov (United States)

    Nigmatullin, R R; Fishman, A I; Filippova, E A; Smith, G

    2005-09-01

    A new method, based on the presentation of initial data in the form of probability circles (PC), has been developed for constructing a calibration curve, which shows a monotonic dependence with respect to the given concentration. The centre of the reference probability circle is defined by its mean value and the radius of the circle is calculated as the value of the standard deviation of the sampling considered. The comparative probability circle is defined by the same corresponding parameters but rotated, relative to the initial reference circle, by an angle, which is related to the Pearson's correlation coefficient (PCC). The two parameters of the PCC and the statistical proximity factor (PCF), which defines the positions of the centres of the circles relative to each other, can be chosen as statistical parameters for the construction of the desired calibration curve. Experiments realized with the mixture of two liquids (chloroform serves as the basic matrix) and acetone (serves as an additive) confirm the efficiency of this new analytical method and demonstrate a possible increase sensitivity for the detection of lower concentration limit by approximately one order of magnitude. This new approach, which is free from model assumptions, and having very clear geometrical meaning, can be applied for different types of spectra and has many potential applications in the construction of calibration curves for different additives embedded within different matrices.

  8. Las ermitas de Portera y Santa Olalla

    Directory of Open Access Journals (Sweden)

    Enrique CERRILLO MARTIN DE CÁCERES

    2009-12-01

    Full Text Available RESUMEN: A partir del estudio de los restos de dos construcciones culturaes aún en pie (Portera y Santa Olalla en la provincia de Cáceres, se intenta llegar a un aislamiento de los santuarios, centros de culto cuya morfología tanto interna como externa es rectangular en oposición a ábside. Con estos datos y los obtenidos de otros similares se trata de buscar los orígenes de tal tipología como resultado de una solución tectónica de cubierta debida en gran parte a un influjo externo. La tipología resultante quedará definida por un cambio cualitativo en los materiales empleados, un cambio en el sistema de construcción y un cambio, en definitva, en la estructura de cubierta que será abovedada. La aplicación exclusiva al centro de culto de estos cambios indicará una diferenciación jerárquica respecto a la nave. Una de las consecuencias que ocasionará el cambio será una considerable reducción del espacio interno, que a su vez afectará posiblemente al mobiliario litúrgico. Por los datos cronológicos que proporcionan los hallazgos conocidos hasta ahora, debieron ser los alrededores de Mérida la zona geográfica que constituyó el centro de estos cambios a fines del s. VI. Las construcciones de la Meseta quedarían encuadradas en una fase que se denomina plena, correspondiente a la segunda mitad del s. VII, mientras que la etapa que une ambos hitos cronológicos sería la fase de transición, en la que coexistirían soluciones constructivas derivadas del sistema romano, junto con el afianzamiento de los nuevos cambios, lo que supondría un período de ensayo.RÉSUMÉ: A partir de l'étude des restes de deux constructions cultuelles encore debout (Portera et Santa Olalla dans la province de Cáceres, on cherche à isoler les sanctuaires, centres de culte, dont la morphologie tant intérieure qu'extérieure est rectangulaire en opposition à \\'abside. Avec ces données et celles tirées d'autres découvertes, il s'agit de chercher

  9. A case study of the Santa Ana winds in the San Gabriel mountains

    Science.gov (United States)

    Michael A. Fosberg

    1965-01-01

    Santa Ana wind structure varies between the high main ridges, the foothills, and the canyon bottoms. In each of these regions, a typical pattern characterizes the Santa Ana. Strong steady wind, at the high levels are determined almost completely by the large scale weather patterns. lntermediate canyons and ridges are affected by Santa Ana winds only when the foehn is...

  10. 77 FR 34991 - Notice of Inventory Completion: University of California, Santa Barbara, Repository of...

    Science.gov (United States)

    2012-06-12

    ... the UCSB and a student crew, as well as by the Santa Barbara County Archaeological Society. No known... National Park Service Notice of Inventory Completion: University of California, Santa Barbara, Repository..., Interior. ACTION: Notice. SUMMARY: The University of California, Santa Barbara (UCSB), has completed an...

  11. PID comes full circle: Applications of V(DJ recombination excision circles in research, diagnostics and newborn screening of primary immunodeficiency disorders

    Directory of Open Access Journals (Sweden)

    Menno C. Van Zelm

    2011-05-01

    Full Text Available The vast majority of patients suffering from a primary immunodeficiency (PID have defects in their T- and/or B-cell compartments. Despite advances in molecular diagnostics, in many patients no underlying genetic defect has been identified. B- and T-lymphocytes are unique in their ability to create a receptor by genomic rearrangement of their antigen receptor genes via V(DJ recombination. During this process, stable circular excision products are formed that do not replicate when the cell proliferates. Excision circles can be reliably quantified using real-time quantitative (RQ-PCR techniques. Frequently occurring δREC–ψJα T-cell receptor excision circles (TRECs have been used to assess thymic output and intronRSS–Kde recombination excision circles (KREC to quantify B-cell replication history. In this perspective, we describe how TRECs and KRECs are formed during precursor- T and B cell differentiation, respectively. Furthermore, we discuss new insights obtained with TRECs and KRECs and specifically how these excision circles can be applied to support therapy monitoring, patient classification and newborn screening of PID.

  12. Literature Circles in a Fifth Grade Classroom: A Qualitative Study Examining How the Teacher and Students Used Literature Circles and the Impact They Have on Student Learning

    Science.gov (United States)

    Pambianchi, Laura Claypool

    2017-01-01

    State and national standards, including the Common Core State Standards, state that students should be expected to learn to discuss and analyze texts, comprehend ideas in increasingly complex texts, and justify their thinking. Literature circles are an instructional practice suggested by many educational writers as an instructional practice that…

  13. Anatomical variations of the circle of Willis and cerebrovascular accidents in transitional Albania

    Directory of Open Access Journals (Sweden)

    Edlira Harizi (Shemsi

    2015-12-01

    Full Text Available Aim: The purpose of this study was twofold: i in a case-control design, to determine the relationship between anatomical variations of the circle of Willis and cerebrovascular accidents; ii to assess the association between anatomical variations of the circle of Willis and aneurisms among patients with subarachnoid hemorrhage. Methods: A case-control study was conducted in Albania in 2013-2014, including 100 patients with subarachnoid hemorrhage and 100 controls (individuals without cerebrovascular accidents. Patients with subarachnoid hemorrhage underwent a CT angiography procedure, whereas individuals in the control group underwent a magnetic resonance angiography procedure. Binary logistic regression was used to assess the association between cerebrovascular accidents and the anatomical variations of the circle of Willis. Conversely, Fisher’s exact test was used to compare the prevalence of aneurisms between subarachnoid hemorrhage patients with and without anatomical variations of the circle of Willis. Results: Among patients, there were 22 (22% cases with anatomical variations of the circle of Willis compared with 10 (10% individuals in the control group (P=0.033. There was no evidence of a statistically significant difference in the types of the anatomical variations of the circle of Willis between patients and controls (P=0.402. In age- and-sex adjusted logistic regression models, there was evidence of a significant positive association between cerebrovascular accidents and the anatomical variations of the circle of Willis (OR=1.87, 95%CI=1.03-4.68, P=0.048. Within the patients’ group, of the 52 cases with aneurisms, there were 22 (42.3% individuals with anatomical variations of the circle of Willis compared with no individuals with anatomical variations among the 48 patients without aneurisms (P<0.001. Conclusion: This study provides useful evidence on the association between anatomical variations of the circle of Willis and

  14. Caracterización de las asfaltitas de Pesca Boyacá - Cantera Santa Teresa

    Directory of Open Access Journals (Sweden)

    Carlos Hernando Higuera-Sandoval

    2013-01-01

    Full Text Available The research presents the technical feasibility of use the asphaltites of Santa Teresa in the municipality of Pesca Boyacá-Colombia, after adjustment for particle size and the bituminous binder, of way to get hot (MDC-2 dense mixtures with Marshall and Ramcodes methodology, according to the regulations of the Instituto Nacional de Vías - INVIAS, for the construction of layers of tread at low volumes of transit routes. The preparation of mixtures dense hot using the asphaltites or asphaltic conglomerates is feasible from the technical and economic point of view and allows you to use a natural resource that is abundant in the municipality of Pesca Boyacá-Colombia to improve the layer of the local and regional road network where the intensity of traffic loads are low, which brings as a consequence an improvement of the quality of life of the inhabitants of the regions.

  15. Submarine Landslides at Santa Catalina Island, California

    Science.gov (United States)

    Legg, M. R.; Francis, R. D.

    2011-12-01

    Santa Catalina Island is an active tectonic block of volcanic and metamorphic rocks originally exposed during middle Miocene transtension along the evolving Pacific-North America transform plate boundary. Post-Miocene transpression created the existing large pop-up structure along the major strike-slip restraining bend of the Catalina fault that forms the southwest flank of the uplift. Prominent submerged marine terraces apparent in high-resolution bathymetric maps interrupt the steep submarine slopes in the upper ~400 meters subsea depths. Steep subaerial slopes of the island are covered by Quaternary landslides, especially at the sea cliffs and in the blueschist metamorphic rocks. The submarine slopes also show numerous landslides that range in area from a few hectares to more than three sq-km (300 hectares). Three or more landslides of recent origin exist between the nearshore and first submerged terrace along the north-facing shelf of the island's West End. One of these slides occurred during September 2005 when divers observed a remarkable change in the seafloor configuration after previous dives in the area. Near a sunken yacht at about 45-ft depth where the bottom had sloped gently into deeper water, a "sinkhole" had formed that dropped steeply to 100-ft or greater depths. Some bubbling sand was observed in the shallow water areas that may be related to the landslide process. High-resolution multibeam bathymetry acquired in 2008 by CSU Monterey Bay show this "fresh" slide and at least two other slides of varying age along the West End. The slides are each roughly 2 hectares in area and their debris aprons are spread across the first terrace at about 85-m water depth that is likely associated with the Last Glacial Maximum sealevel lowstand. Larger submarine slides exist along the steep Catalina and Catalina Ridge escarpments along the southwest flank of the island platform. A prominent slide block, exceeding 3 sq-km in area, appears to have slipped more than

  16. En el Cincuentenario del Hospital Santa Clara

    Directory of Open Access Journals (Sweden)

    Gilberto Rueda Pérez

    1992-12-01

    Full Text Available

    El 16 de julio de 1942 nace el Hospital Sanatorio Antituberculoso Santa Clara en Santafé de Bogotá.
    Un siglo atrás, casi a la fecha, en 1843, nace en Alemania Roberto Koch, quien, 60 años antes de la fundación del Hospital, el 24 de marzo de 1882, presenta al mundo el descubrimiento del Micobacterium Tuberculosis, germen causante de la enfermedad que ataca alhombre desde sus más remotos orígenes y que aún nos acompaña, especialmente en los países subdesarrollados, causando severo impacto en la salud de las poblaciones más necesitadas, apesar de los grandes avances alcanzados en el campo de la Medicina a nivel mundial.
    Por haber sido destinado el Hospital altratamiento de los tuberculosos, destino que aún conserva primordialmente aunque, como se verá posteriormente, sus camas reciben enfermos de medicina general dada la evolución de los tratamientos y la modernización de los esquemas terapéuticos, se justifica ampliamente mencionar aquí los principales avances relacionados con el control de la Tuberculosis a través de los tiempos hasta la fundación del Hospital.

    Estos se pueden resumir así:

    • 'HIPOCRATES (460-377 a. C.:describe la consunción y la llama tisis; lanza el concepto de herencia que perdura por siglos.
    • ARISTOTELES(324-284a. C.:habla del contagio a través de la respiración.
    • CELSO (siglo I a. C.: describe el tubérculo y señala tres formas de consunción: atrofia, caquexia y tisis.
    • GALENO(181-261 d. C.: la agrupa con otras enfermedades transmisibles: la peste, la sarna, etc.
    • EDADMEDIA(sigloVII alXIIId. C.:se destaca únicamente como aporte nuevo Maimonides, filósofo judío radicado en Granada (11351204,quien describe la tisis de los animales.

    Posteriormente Girolamo Fracastoro (1478-1553, nacido en Verona,la asimila a la viruela y lanza la teoría microbiana.

    • PARACELSO(1493-1541pregona que: los

    • Influencia del marketing a través de facebook en la economía de negocios locales de Santa Rosa, Provincia de El Oro

      Directory of Open Access Journals (Sweden)

      Tatiana Sánchez

      2015-12-01

      to quantitatively analyze the data obtained from the surveys specified. The results of the analysis of the data showed that promoting products and services through the social network Facebook has positively influenced the economy of Santa Rosa. Similarly, the results show that businesses that have used this as a marketing tool for longer perform advertising updates more frequently, which may positively affect the increase in customers and thus raising the income received sales.

    • Santa Fé ante el ataque de Raleigh a la Guayana

      Directory of Open Access Journals (Sweden)

      Manuel Lucena Salmoral

      1962-11-01

      Full Text Available A la una de la tarde del 12 de enero de 1618 comenzaron a desembarcar los efectivos militares que el corsario inglés Walter Raleigh lanzaba contra la pequeña ciudad de Santo Tomé (Guayana, dependiente por aquel entonces, como toda la provincia de El Dorado, de la Real Audiencia de Santa Fé.

    • Coyote Creek (Santa Clara County) Pilot Revegetation Project

      Science.gov (United States)

      John T. Stanley; L. R. Silva; H. C. Appleton; M. S. Marangio; W. J. Lapaz; B. H. Goldner

      1989-01-01

      The Santa Clara Valley Water District, located in Northern California, is currently evaluating a pilot riparian revegetation project on a 1.6 ha (4 ac) site adjacent to Coyote Creek in the south San Francisco Bay Area. Specific techniques used during the design, site preparation and installation of 3640 plants (including seed planting locations) are described. This...

    • Quantifying Sulfur-Containing Compounds Over the Santa Barbara Channel

      Science.gov (United States)

      Black, J.; Hughes, S.; Blake, D. R.

      2016-12-01

      Carbonyl sulfide (OCS) is emitted to the atmosphere through the outgassing of ocean surface waters. OCS is also the primary source of sulfur-containing compounds in the stratosphere and contributes to the formation of the stratospheric sulfate layer. During the 2016 Student Airborne Research Program (SARP), whole air samples were collected on the NASA DC-8 aircraft over the Santa Barbara Channel. Five additional surface samples were taken at various locations along the Santa Barbara Channel. The samples were analyzed using gas chromatography in the Rowland-Blake lab at UC Irvine, and compounds such as OCS, dimethyl sulfide (DMS), carbon disulfide (CS2), bromoform (CHBr3), and methyl iodide (CH3I) associated with ocean emissions and stratospheric aerosols were analyzed. These marine sourced compounds, excluding OCS, showed expected trends of dilution with increasing altitude. The surface samples from the Santa Barbara Channel all exhibited elevated concentrations of OCS in comparison to samples taken from the aircraft, with an average of 666 ± 12 pptv, whereas the average background concentration of OCS was 587 ± 19 pptv. SARP flights from 2009-2015 over the Santa Barbara Channel saw an average OCS concentration of 548 ± 26 pptv. Elevated levels of OCS have never been detected from the aircraft during SARP flights, indicating that OCS emissions must be measured using surface sampling if emission estimates from the ocean are to be evaluated.

  1. Natural Law, Santa Clara, and the Supreme Court.

    Science.gov (United States)

    Rodgers, Raymond S.; Lujan, Phillip

    The court case, "Santa Clara Pueblo, et al. v. Julia Martinez, et al.," is the subject of this paper. It gives the background of the case of a woman whose children were refused admittance to tribal rolls because of an ordinance prohibiting the enrollment of children whose father is not a tribal member. The paper gives the arguments of…

  2. Seafloor off Pleasure Point, Santa Cruz County, California

    Science.gov (United States)

    Storlazzi, Curt D.; Golden, Nadine E.; Gibbons, Helen

    2013-01-01

    The seafloor off Pleasure Point, Santa Cruz County, California, is extremely varied, with sandy flats, boulder fields, faults, and complex bedrock ridges. These ridges support rich marine ecosystems; some of them form the "reefs" that produce world-class surf breaks. Colors indicate seafloor depth, from red-orange (about 2 meters or 7 feet) to magenta (25 meters or 82 feet)

  3. Updates on the genus Euphorbia (Euphorbiaceae) in Santa Catarina, Brazil

    DEFF Research Database (Denmark)

    Hassemer, Gustavo; Marques da Silva, Otávio Luis; Funez, Luís Adriano

    2017-01-01

    This contribution presents updates to the knowledge of the species of Euphorbia that occur in Santa Catarina state, southern Brazil. More specifically, we here typify the names E. cyathophora, E. hirtella, E. paranensis and E. stenophylla, and present the first records of E. cyathophora, E...

  4. [Medical speciality, belief in Santa and the risk of divorce].

    Science.gov (United States)

    Lund, Kamma Sundgaard; Aabenhus, Rune Munck; Arreskov, Anne Beiter

    2016-12-12

    Christmas is a unique time for family occasions - unfortunately the number of divorces increase in the months after Christmas. In this study, we examined the relationship between medical speciality, length of relationship, risk of divorce and if belief in Santa impacted on these outcomes. A questionnaire was developed from the lived experiences of the authors and distributed to doctors of any speciality through links (SurveyXact) in emails, text messages and Facebook from June 28 2016 to August 1 2016. Multivariate regression models were used to analyze the results. A total of 1,100 completed questionnaires were included in the analyses. The divorce rate among respondents was 12%. Compared to the speciality "general practice" all other specialities had higher divorce rates. The highest risk of divorce was reported by physicians specialized in psychiatry (odds ratio 2.13 (95% confidence interval: 1.03-4.43)). Belief in Santa was associated with a slightly increased risk of divorce in all medical specialities, with the exception of psychiatry. General practitioners also exhibited the longest duration of relationships compared to peers in other medical specialities. Being a general practitioner was associated with a low risk of divorce and significantly longer relationships than in other medical specialities. Belief in Santa in regard to divorce only seemed to be beneficial for psychiatrists. So please participate in the joy of Christmas but do not rely on Santa - go shop your own presents for the family. none. not relevant.

  5. A Santa Sé e a Conferência de Helsinque

    Directory of Open Access Journals (Sweden)

    Virgílio Caixeta Arraes

    2011-02-01

    Full Text Available A presente exposição busca, brevemente, estudar a atuação da Santa Sé durante a Conferência de Helsinque e analisar a diplomacia pontifica durante esse período da Guerra Fria.

  6. Breeding and trade of wildlife in Santa Catarina state, Brazil

    Directory of Open Access Journals (Sweden)

    VV Kuhnen

    Full Text Available The wildlife trade is becoming increasingly more relevant in discussions concerning conservation biology and the sustainable management of natural resources. The aim of this study was to document the trade and breeding of wildlife in Santa Catarina state, in southern Brazil. Data was collected from annual reports (1996-2008 of wildlife breeders which were sent to IBAMA. By the end of 2008, there were 79 wildlife breeders and 11 wildlife traders distributed in Santa Catarina. Commercial breeding accounted for the highest number of breeders (51%. In total, there are 213 species of wild animals bred in the state: 177 birds, 19 mammals and 17 reptiles. Of these, 48% are native to Santa Catarina, 32% occur in other Brazilian states and 20% are exotic to Brazil. Nine percent of the species bred are vulnerable or endangered. It was observed that some breeders reported breeding unauthorized species. Altogether, 93 species are bred illegally by 19 breeders. Of these species, 48 are native to Santa Catarina and three are classified as vulnerable or in danger of extinction. We hope the data presented in this paper contributes to the development of conservation strategies and conscious use of wildlife resources in Brazil.

  7. Breeding and trade of wildlife in Santa Catarina state, Brazil.

    Science.gov (United States)

    Kuhnen, V V; Remor, J O; Lima, R E M

    2012-02-01

    The wildlife trade is becoming increasingly more relevant in discussions concerning conservation biology and the sustainable management of natural resources. The aim of this study was to document the trade and breeding of wildlife in Santa Catarina state, in southern Brazil. Data was collected from annual reports (1996-2008) of wildlife breeders which were sent to IBAMA. By the end of 2008, there were 79 wildlife breeders and 11 wildlife traders distributed in Santa Catarina. Commercial breeding accounted for the highest number of breeders (51%). In total, there are 213 species of wild animals bred in the state: 177 birds, 19 mammals and 17 reptiles. Of these, 48% are native to Santa Catarina, 32% occur in other Brazilian states and 20% are exotic to Brazil. Nine percent of the species bred are vulnerable or endangered. It was observed that some breeders reported breeding unauthorized species. Altogether, 93 species are bred illegally by 19 breeders. Of these species, 48 are native to Santa Catarina and three are classified as vulnerable or in danger of extinction. We hope the data presented in this paper contributes to the development of conservation strategies and conscious use of wildlife resources in Brazil.

  8. Islas de Old Providence y Santa Catalina. Presente y futuro

    Directory of Open Access Journals (Sweden)

    June Marie Mow

    2005-11-01

    Full Text Available Las Islas de Providencia y Santa Catalina ofrecen una combinación única de diversidad biológica y autenticidad cultural, convirtiéndose en las Islas menos degradadas ambiental y culturalmente en el Caribe; son áreas naturales, con bajos niveles de turismo, relativamente intactas en las cuales la comunidad isleña nativa local juega un papel significativo. La falta de una marca como destino turístico único nacional e internacionalmente, la baja conectividad, la carencia de una estrategia promocional, así como la baja importancia del sector para el gobierno local, brindan la oportunidad para que el ecoturismo trabaje para la gente de Old Providence y Santa Catalina bajo sus propias reglas de juego y que la voluntad política no sea desviada por ganancias de corto plazo o esquemas superficialmente muy atractivos, pero que no generan beneficios para la población local. La visión de la gente de Old Providence y Santa Catalina es que, sea el ecoturismo la forma de ofrecer nuevas opciones socioeconómicas a las poblaciones locales para que puedan obtener los beneficios de sus senderos, playas, arrecifes y áreas naturales, la tradición, y cultura local. Para ello, es posible aprovechar de manera sostenible la introducción de un nuevo paradigma para el desarrollo sostenible de Old Providence y Santa Catalina: La Reserva de Biosfera Seaflower.

  9. Cultural resources of the Santa Rita Experimental Range

    Science.gov (United States)

    John H. Madsen

    2003-01-01

    The Santa Rita Experimental Range is a vast open space with few signs of houses or human habitation, but at one time it was quite the opposite scene. Archaeological surface inspections reveal heavy use of the Range dating back hundreds of years. This paper will review the history of cultural resource management on the Range and provide a timeline of local cultural...

  10. Use of quality circles among first year medical students and impact on student satisfaction.

    Science.gov (United States)

    Akturk, Zekeriya; Dagdeviren, Nezih; Sahin, Erkan Melih; Ozer, Cahit

    2002-03-23

    Quality circles in the classroom setting are composed of students who meet regularly to identify, analyse and solve problems related to a course, and implement solutions. We recently instituted quality circles (QCs) among preclinical medical students and evaluated their impact on quality of learning and student satisfaction. Included in the study were all 135 first-year medical students of Trakya University School of Medicine in the 2000-2001 academic year. Six students were selected randomly out of 26 volunteers as circle members. Circle participants met once a week for 14 45-minute sessions to discuss educational issues, propose solutions and prepare a report for submission to the dean. A questionnaire was administered to all first-year students and the replies provided the problem pool from which the QC chose the problem to be addressed. A total of 22 problems concerned education and 28 were identified in the fields of accommodation, social activities and other issues. To evaluate the change in the perceived quality of learning, circle members prepared a questionnaire designed to compare satisfaction at the beginning and end of the study period. This questionnaire was composed of 26 items and evaluated various aspects of education. There was a significant increase in student satisfaction after the one-year study period (p = 0.001). In addition to enhancing quality of learning, quality circles improved student satisfaction as well. More studies should be conducted to test the impact of QCs on education in different settings and different classes. Our results show that the use of quality circles in first-year medical students improves quality of learning and student satisfaction.

  11. Native fish population and habitat study, Santa Ana River, California

    Science.gov (United States)

    Wulff, Marissa L.; Brown, Larry R.; May, Jason

    2017-01-01

    Collection of additional data on the Santa Ana Sucker (Catostomus santaanae) and the Arroyo Chub (Gila orcutti) has been identified as a needed task to support development of the upper Santa Ana River Habitat Conservation Plan (HCP; http://www.uppersarhcp.com/). The ability to monitor population abundance and understanding the habitats used by species are important when developing such plans. The Santa Ana Sucker (Catostomus santaanae) is listed as a threatened species under federal legislation and is considered a species of special concern in California by the California Department of Fish and Wildlife (Moyle 2002). The Arroyo Chub (Gila orcutti) is considered a species of special concern in California by the California Department of Fish and Wildlife (Moyle 2002). Both species are present in the Santa Ana River watershed in the area being evaluated for establishment of the upper Santa Ana River Habitat Conservation Plan (HCP; http://www.uppersarhcp.com/). The HCP is a collaborative effort involving the water resource agencies of the Santa Ana River Watershed, the US Fish and Wildlife Service, California Department of Fish and Wildlife, and other government agencies and stakeholder organizations. The goals of the HCP are to: 1) enable the water resource agencies to provide a reliable water supply for human uses; 2) conserve and maintain natural rivers and streams that provide habitat for a diversity of unique and rare species; and 3) maintain recreational opportunities for activities such as hiking, fishing, and wildlife viewing, provided by the protection of these habitats and the river systems they depend on. The HCP will specify how species and their habitats will be protected and managed in the future and will provide the incidental take permits needed by the water resource agencies under the federal and State endangered species acts to maintain, operate, and improve their water resource infrastructure. Although the Santa Ana Sucker has been the subject of

  12. Beyond the magic circle : A network perspective on role-play in online games

    NARCIS (Netherlands)

    Copier, M.

    2007-01-01

    Currently, game research is characterized by the (re)construction of contested boundaries such as the “magic circle” of the game experience. These boundaries create dichotomies, for instance, between the real and the imaginary that hide the complexity of actual play, design and research. In this

  13. A Method for Converting the British Circle C Coefficient Based on the Froude ’O’ Values to a Circle C Coefficient Based on the Schoenherr Formula. Second Edition,

    Science.gov (United States)

    parameter, known as circle C , is generally calculated from the resistance or effective horsepower of a given ship as predicted from model-test data using the...R.E. Froude frictional constants for both model and full scale. For comparative purposes, the circle C values for the various vessels are generally...all American model basins, for use internationally. One of the consequences of such a proposed change is that the numerical values of circle C calculated

  14. California State Waters Map Series: offshore of Santa Barbara, California

    Science.gov (United States)

    Johnson, Samuel Y.; Dartnell, Peter; Cochrane, Guy R.; Golden, Nadine E.; Phillips, Eleyne L.; Ritchie, Andrew C.; Greene, H. Gary; Krigsman, Lisa M.; Kvitek, Rikk G.; Dieter, Bryan E.; Endris, Charles A.; Seitz, Gordon G.; Sliter, Ray W.; Erdey, Mercedes D.; Gutierrez, Carlos I.; Wong, Florence L.; Yoklavich, Mary M.; Draut, Amy E.; Hart, Patrick E.; Conrad, James E.; Cochran, Susan A.; Johnson, Samuel Y.; Cochran, Susan A.

    2013-01-01

    In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and visualization of swath sonar data, acoustic backscatter, seafloor video, seafloor photography, high-resolution seismic-reflection profiles, and bottom-sediment sampling data. The map products display seafloor morphology and character, identify potential marine benthic habitats, and illustrate both the surficial seafloor geology and shallow (to about 100 m) subsurface geology. The Offshore of Santa Barbara map area lies within the central Santa Barbara Channel region of the Southern California Bight. This geologically complex region forms a major biogeographic transition zone, separating the cold-temperate Oregonian province north of Point Conception from the warm-temperate California province to the south. The map area is in the southern part of the Western Transverse Ranges geologic province, which is north of the California Continental Borderland. Significant clockwise rotation—at least 90°—since the early Miocene has been proposed for the Western Transverse Ranges province, and geodetic studies indicate that the region is presently undergoing north-south shortening. Uplift rates (as much as 2.2 mm/yr) that are based on studies of onland marine terraces provide further evidence of significant shortening. The city of Santa Barbara, the main coastal population center in the map area, is part of a contiguous urban area that extends from Carpinteria to Goleta. This urban area was developed on the coalescing alluvial surfaces, uplifted marine terraces, and low hills that lie south of the east-west-trending Santa Ynez Mountains. Several beaches line the actively

  15. Hormigas (Hymenoptera: Formicidae de la provincia de Santa Fe, Argentina Ants (Hymenoptera: Formicidae of Santa Fe province, Argentina

    Directory of Open Access Journals (Sweden)

    Fernando Vittar

    2008-06-01

    Full Text Available El presente trabajo pretende aportar una lista faunística actualizada de las subfamilias, tribus, géneros y especies de hormigas de la provincia de Santa Fe, Argentina. Si bien estos listados tienen poca duración temporal, contribuyen en gran medida a incrementar el conocimiento de un taxón determinado, despertando interés y brindando una herramienta fundamental para el desarrollo de estudios posteriores. Como resultado, nueve registros son nuevos para la Argentina y dos géneros y 18 citas de especies nuevas para la provincia de Santa Fe.The present paper provides an updated faunistic list of the subfamilies, tribes, genera and species of ants of Santa Fe province, Argentina. To a great extent, these listings contribute to increase the knowledge of a specific taxa, awaking interest, and offering a fundamental tool for the development of subsequent studies. As a result, nine species are cited as new for Argentina, and two genera and 18 species are cited for Santa Fe province for the first time.

  16. Hyperbolic Hopfield neural networks.

    Science.gov (United States)

    Kobayashi, M

    2013-02-01

    In recent years, several neural networks using Clifford algebra have been studied. Clifford algebra is also called geometric algebra. Complex-valued Hopfield neural networks (CHNNs) are the most popular neural networks using Clifford algebra. The aim of this brief is to construct hyperbolic HNNs (HHNNs) as an analog of CHNNs. Hyperbolic algebra is a Clifford algebra based on Lorentzian geometry. In this brief, a hyperbolic neuron is defined in a manner analogous to a phasor neuron, which is a typical complex-valued neuron model. HHNNs share common concepts with CHNNs, such as the angle and energy. However, HHNNs and CHNNs are different in several aspects. The states of hyperbolic neurons do not form a circle, and, therefore, the start and end states are not identical. In the quantized version, unlike complex-valued neurons, hyperbolic neurons have an infinite number of states.

  17. Network systems security analysis

    Science.gov (United States)

    Yilmaz, Ä.°smail

    2015-05-01

    Network Systems Security Analysis has utmost importance in today's world. Many companies, like banks which give priority to data management, test their own data security systems with "Penetration Tests" by time to time. In this context, companies must also test their own network/server systems and take precautions, as the data security draws attention. Based on this idea, the study cyber-attacks are researched throughoutly and Penetration Test technics are examined. With these information on, classification is made for the cyber-attacks and later network systems' security is tested systematically. After the testing period, all data is reported and filed for future reference. Consequently, it is found out that human beings are the weakest circle of the chain and simple mistakes may unintentionally cause huge problems. Thus, it is clear that some precautions must be taken to avoid such threats like updating the security software.

  18. [Goal analysis of participants and moderators of general practice quality circles].

    Science.gov (United States)

    Tausch, B; Härter, M

    1996-08-01

    Quality circles (peer review) are a process of a continuous, systematic and critical reflection of care providers on their own and colleagues' performance by using structured procedures with the aim of achieving a continuous improvement. Main goal of the topic-oriented quality circle model in Sudbaden (Germany) is the development of guidelines for primary health care. The quality circle programme of the society of health insurances of Sudbaden is currently given a systematic evaluation. The results presented refer to 246 participants and moderators of 25 groups who have completed questionnaires. Attention is given to the general goals of the doctors participating in quality circle groups. When asked about the most important goals of peer review the participants scored the highest ranking on (1) exchanging practice experiences with colleagues (2) the personal reflection of one's way of working (3) agreeing on guidelines and targets for desirable performance and (4) developing guidelines for general practice. From the results, conclusions regarding the concept of quality circles and the methods for developing practice guidelines are drawn.

  19. The Exclusionary Circle Game: A Tool to Promote Critical Dialogue About HIV Stigma and Social Justice.

    Science.gov (United States)

    Wong, Josephine Pui; Li, Alan Tai

    2015-01-01

    The Exclusionary Circle Game was a learning tool developed for an intervention study to address stigma associated with human immunodeficiency virus (HIV) infection and social exclusion. The objectives of The Exclusionary Circle Game were to enhance collective resonance and empathy, promote critical reflection and dialogue, and motivate collective action to address social exclusion. The game began with all participants being inside a circle. Each participant was randomly given one color-coded card. Each card color represented a character with a specific lived experience associated with racism, patriarchy, homophobia, transphobia, HIV stigma, and so on. Participants holding a marginalized status card were asked to leave the circle in sequence and go to designated spaces. Eventually, only one half of the participants were left in the circle. Participants then debriefed about their experiences within the entire group. The game has been used, beyond the intervention study, at research conferences with positive feedback. In this article, we detail the processes, strengths, and possibility of using this game for empowerment education.

  20. Adult education for local community development: A cross-border experience of study circles

    Directory of Open Access Journals (Sweden)

    Giovanna Del Gobbo

    2014-04-01

    Full Text Available The relationship between adult education and local community development is emphasised by the contextualisation of study circles in the cross-border area along the border between Italy and Slovenia. The system of crossborder study circles development is described on the basis of local challenges framed in the theory of human and social capital. The educational model of study circles, well developed in Slovenia, is implemented. New dimensions development and empirical data are provided by the EU project. Monitoring evidence stimulated educational demands of the local community on various levels of activity (training programmes for mentors, study circles, stakeholders round tables and at the same time stimulated offers as well. The project described demonstrates the possibility of building a local system of study circles linked to local development in the border area via a multi-level approach and the direct involvement of the various stakeholders. The final discussion highlights the importance of vertical and horizontal integration, typical for long-term bottom-up development. The diversity of learning devices and the role of the intermediary level provide a greater degree of creativity and initiative than the formal educational system, but only when it is recognised and empowered by top-down decision making.

  1. Automatic Detection and Quantification of WBCs and RBCs Using Iterative Structured Circle Detection Algorithm

    Science.gov (United States)

    Alomari, Yazan M.; Zaharatul Azma, Raja

    2014-01-01

    Segmentation and counting of blood cells are considered as an important step that helps to extract features to diagnose some specific diseases like malaria or leukemia. The manual counting of white blood cells (WBCs) and red blood cells (RBCs) in microscopic images is an extremely tedious, time consuming, and inaccurate process. Automatic analysis will allow hematologist experts to perform faster and more accurately. The proposed method uses an iterative structured circle detection algorithm for the segmentation and counting of WBCs and RBCs. The separation of WBCs from RBCs was achieved by thresholding, and specific preprocessing steps were developed for each cell type. Counting was performed for each image using the proposed method based on modified circle detection, which automatically counted the cells. Several modifications were made to the basic (RCD) algorithm to solve the initialization problem, detecting irregular circles (cells), selecting the optimal circle from the candidate circles, determining the number of iterations in a fully dynamic way to enhance algorithm detection, and running time. The validation method used to determine segmentation accuracy was a quantitative analysis that included Precision, Recall, and F-measurement tests. The average accuracy of the proposed method was 95.3% for RBCs and 98.4% for WBCs. PMID:24803955

  2. [Results of residual ametropia correction using CIRCLE technology after femtosecond laser SMILE surgery].

    Science.gov (United States)

    Kostin, O A; Rebrikov, S V; Ovchinnikov, A I; Stepanov, A A; Takhchidi, Kh P

    to evaluate functional results of reoperation performed according to the CIRCLE technology and using the VisuMax femtosecond laser and MEL-80 excimer laser in cases of regression of the refractive effect after SMILE surgery. We studied a group of post-SMILE patients. In those, who showed regression of the refractive effect at 1 year, reoperation was performed according to the CIRCLE technology and using the VisuMax femtosecond laser. The corneal flap was separated from the stromal bed and turned aside. Excimer laser ablation of the stromal bed was performed with the MEL 80 machine. The corneal flap was then placed back and rinsed from both sides. Uncorrected (UCVA) and corrected (BCVA) visual acuity as well as spherical equivalent (SE) were estimated before reoperation, on day 1, and at 1 month. After reoperation, BCVA and UCVA improved. Patient refraction became close to emmetropia. Specifically, UCVA was 0.23±0.18 at baseline (i.e. 1 year after SMILE) and 0.93±0.11 after the CIRCLE procedure (pCIRCLE, respectively (p0.05). Reoperation performed according to the CIRCLE technology and using the VisuMax femtosecond laser and MEL-80 excimer laser provides an increase in visual acuity in case of post-SMILE regression of the refractive effect.

  3. Traffic flow behavior at a single lane roundabout as compared to traffic circle

    Energy Technology Data Exchange (ETDEWEB)

    Lakouari, N.; Ez-Zahraouy, H., E-mail: ezahamid@fsr.ac.ma; Benyoussef, A.

    2014-09-05

    In this paper, we propose a stochastic Cellular Automata (CA) model to study traffic flow at a single-lane urban roundabout (resp. traffic circle) of N entry points (resp. exit points), the entry points are controlled by rates α{sub 1} and α{sub 2} while the removal rates from the exit points are denoted by β. The traffic is controlled by a self-organized scheme. Based on computer simulation, density profiles, global density and current are calculated in terms of rates. Furthermore, the phase diagrams for roundabout as well as traffic circle are constructed. It has turned out that the phase diagrams consist essentially of two phases namely free flow and jamming. It is noted that the typology of the phase diagrams of the roundabout is not similar to it in the traffic circle. Furthermore, we have compared the performance of the two systems in terms of the geometrical properties and the number of entry points. - Highlights: • Simulations are conducted to study traffic flow at a single-lane urban roundabout as well as traffic circle. • Phase diagrams for roundabout as well as traffic circle are constructed. • The performance of the two systems are compared in terms of the geometrical properties and the number of entry points.

  4. Does the Value Circle Exist Within Persons or Only Across Persons?

    Science.gov (United States)

    Borg, Ingwer; Bardi, Anat; Schwartz, Shalom H

    2017-04-01

    This study tests whether the Schwartz (1992) value circle exists within individuals, not only across individuals, thereby providing evidence for the within-person rationale underlying the value circle. We analyze responses from five samples (a representative sample in Britain, a general population sample in the United States, and university students in Britain and Iran) varying in value measures of the Schwartz value theory (SVS, PVQ40, PVQ21). An unfolding model is used to map each person's value profile into a two-dimensional space representing both persons and values. In all samples, clear value circles were found, with values ordered around the circle largely according to the theory. The model also represents most individuals well. The value circle exists within individuals, providing strong support for the underlying within-person rationale for the Schwartz (1992) value theory. The unfolding analysis allows identifying which persons fit the model less well and in which way, identifying how meaningful subgroups differ in their value profiles, and testing whether meaningful subgroups have different value structures. The model opens up many new possibilities for research linking values to other variables. © 2015 Wiley Periodicals, Inc.

  5. Promoting retention, enabling success: Discovering the potential of student support circles.

    Science.gov (United States)

    Bass, Janice; Walters, Caroline; Toohill, Jocelyn; Sidebotham, Mary

    2016-09-01

    Retention of students is critical to education programs and future workforce. A mixed methods study evaluated student engagement within a Bachelor of Midwifery program and connection with career choice through participation in student support circles. Centred on the Five Senses of Success Framework (sense of capability, purpose, identity, resourcefulness and connectedness) and including four stages of engagement (creating space, preparing self, sharing stories, focused conversations), the circles support and develop student and professional identity. Of 80 students 43 (54%) provided responses to a two item survey assessed against a five point Likert scale to determine utility. Using a nominal group technique, student's voices gave rich insight into the personal and professional growth that participation in the student support circles provided. Evaluated as helpful to first year students in orientating to university study and early socialisation into the profession, the circles appear to influence the development of a strong sense of professional identity and personal midwifery philosophy based on the relational nature of the midwife being with woman rather than doing midwifery. This suggests that student support circles positively influence perceptions and expectations, contributing to a shared sense of purpose and discipline connection, for enhancing student retention and future workforce participation. Copyright © 2016 Elsevier Ltd. All rights reserved.

  6. Automatic Detection and Quantification of WBCs and RBCs Using Iterative Structured Circle Detection Algorithm

    Directory of Open Access Journals (Sweden)

    Yazan M. Alomari

    2014-01-01

    Full Text Available Segmentation and counting of blood cells are considered as an important step that helps to extract features to diagnose some specific diseases like malaria or leukemia. The manual counting of white blood cells (WBCs and red blood cells (RBCs in microscopic images is an extremely tedious, time consuming, and inaccurate process. Automatic analysis will allow hematologist experts to perform faster and more accurately. The proposed method uses an iterative structured circle detection algorithm for the segmentation and counting of WBCs and RBCs. The separation of WBCs from RBCs was achieved by thresholding, and specific preprocessing steps were developed for each cell type. Counting was performed for each image using the proposed method based on modified circle detection, which automatically counted the cells. Several modifications were made to the basic (RCD algorithm to solve the initialization problem, detecting irregular circles (cells, selecting the optimal circle from the candidate circles, determining the number of iterations in a fully dynamic way to enhance algorithm detection, and running time. The validation method used to determine segmentation accuracy was a quantitative analysis that included Precision, Recall, and F-measurement tests. The average accuracy of the proposed method was 95.3% for RBCs and 98.4% for WBCs.

  7. Microstructural asymmetry of the corticospinal tracts predicts right-left differences in circle drawing skill in right-handed adolescents

    DEFF Research Database (Denmark)

    Angstmann, Steffen; Madsen, Kathrine Skak; Skimminge, Arnold

    2016-01-01

    of circle drawing movements was assessed for each hand using a digitizing tablet. Although all participants were right-handed, there was substantial inter-individual variation regarding the relative right-hand advantage for fluent circle drawing. All subjects underwent whole-brain diffusion tensor imaging...... relationship with right-left asymmetry in fluent circle drawing after correction for age and gender. The higher the mean FA values were in the left dominant CST relative to the right non-dominant CST, the stronger was the relative right-hand advantage for regular circle drawing. These findings show that right...

  8. [Evaluation of a training program for moderators of panel doctor quality circles: a progress assessment].

    Science.gov (United States)

    Szecsenyi, J; Andres, E; Bahrs, O; Gerlach, F M; Weiss-Plumeyer, M

    1995-08-01

    We report about the first 7 seminars of a training programme for presenters of quality circles for panel doctors. The seminars aim to train techniques of moderating a group and to give a methodological background for the work with quality circles. 65 (44.2%) of the 147 participants were general practitioners, 34 (23.1%) were internists and 32 (21.8%) were specialists of other disciplines. 16 (10.9%) were not physicians or not working as a physician. An evaluation of the seminars by a structured questionnaire showed mean ratings of 2.1 for lectures [in terms of school-marks from 1 (very good) to 6 (very poor)] and 1.8 for the work in small groups. Working atmosphere and opportunities for active participation were rated most positively. 6 months after the course, 64.9% of the participants already had arranged dates for meetings or had started with own quality circles.

  9. PACKING CIRCLES WITHIN CIRCULAR CONTAINERS: A NEW HEURISTIC ALGORITHM FOR THE BALANCE CONSTRAINTS CASE

    Directory of Open Access Journals (Sweden)

    Washington Alves de Oliveira

    Full Text Available ABSTRACT In this work we propose a heuristic algorithm for the layout optimization for disks installed in a rotating circular container. This is a unequal circle packing problem with additional balance constraints. It proved to be an NP-hard problem, which justifies heuristics methods for its resolution in larger instances. The main feature of our heuristic is based on the selection of the next circle to be placed inside the container according to the position of the system's center of mass. Our approach has been tested on a series of instances up to 55 circles and compared with the literature. Computational results show good performance in terms of solution quality and computational time for the proposed algorithm.

  10. Great circle solution to polarization-based quantum communication (QC) in optical fiber

    Science.gov (United States)

    Nordholt, Jane Elizabeth; Peterson, Charles Glen; Newell, Raymond Thorson; Hughes, Richard John

    2016-03-15

    Birefringence in optical fibers is compensated by applying polarization modulation at a receiver. Polarization modulation is applied so that a transmitted optical signal has states of polarization (SOPs) that are equally spaced on the Poincare sphere. Fiber birefringence encountered in propagation between a transmitter and a receiver rotates the great circle on the Poincare sphere that represents the polarization bases used for modulation. By adjusting received polarizations, polarization components of the received optical signal can be directed to corresponding detectors for decoding, regardless of the magnitude and orientation of the fiber birefringence. A transmitter can be configured to transmit in conjugate polarization bases whose SOPs can be represented as equidistant points on a great circle so that the received SOPs are mapped to equidistant points on a great circle and routed to corresponding detectors.

  11. Circle Solutions, a philosophy and pedagogy for learning positive relationships: What promotes and inhibits sustainable outcomes?

    Directory of Open Access Journals (Sweden)

    Florence McCarthy

    2013-04-01

    Full Text Available Educators are increasingly aware that the efficacy of social and emotional learning (SEL is dependent on implementation factors, not just program content. These include the philosophy underpinning an intervention, the beliefs as well as the skills of facilitators, and the classroom/whole school context in which the intervention takes place. This article outlines the philosophy and pedagogy of Circle Solutions and presents findings from research where 18 undergraduate students supported and developed ‘Circle Time’ in 8 Greater Western Sydney primary schools for a university module on community service. The study indicates that when there is full teacher participation within the principles of the Circle philosophy, together with activeschool support that promotes relational values, the learning outcomes for positive relationship building are more sustainable.

  12. Mosh pits and Circle pits: Collective motion at heavy metal concerts

    Science.gov (United States)

    Bierbaum, Matthew; Silverberg, Jesse L.; Sethna, James P.; Cohen, Itai

    2013-03-01

    Heavy metal concerts present an extreme environment in which large crowds (~102 -105) of humans experience very loud music (~ 130 dB) in sync with bright, flashing lights, often while intoxicated. In this setting, we find two types of collective motion: mosh pits, in which participants collide with each other randomly in a manner resembling an ideal gas, and circle pits, in which participants run collectively in a circle forming a vortex of people. We model these two collective behaviors using a flocking model and find qualitative and quantitative agreement with the behaviors found in videos of metal concerts. Futhermore, we find a phase diagram showing the transition from a mosh pit to a circle pit as well as a predicted third phase, lane formation.

  13. Experimental implementation of a quantum walk on a circle with single photons

    Science.gov (United States)

    Bian, Zhi-Hao; Li, Jian; Zhan, Xiang; Twamley, Jason; Xue, Peng

    2017-05-01

    We experimentally implement a quantum walk on a circle in position space. Using a different arrangement of linear optical elements, our experiment realizes clockwise-cycling and counterclockwise-cycling walks. Periodic evolutions in quantum walks on three- and four-node circles with uniform coin flipping for each step and a localized initial walker state are observed, and the full revival of the walker+coin state occurs. Coherent information encoded in the coin state shows the periodic collapse and revival due to the interaction between the coin and walker. The technology to realize clockwise-cycling and counterclockwise-cycling walks can be expanded to simulate a quantum walk on a circle with arbitrary nodes.

  14. Zernike expansion of derivatives and Laplacians of the Zernike circle polynomials.

    Science.gov (United States)

    Janssen, A J E M

    2014-07-01

    The partial derivatives and Laplacians of the Zernike circle polynomials occur in various places in the literature on computational optics. In a number of cases, the expansion of these derivatives and Laplacians in the circle polynomials are required. For the first-order partial derivatives, analytic results are scattered in the literature. Results start as early as 1942 in Nijboer's thesis and continue until present day, with some emphasis on recursive computation schemes. A brief historic account of these results is given in the present paper. By choosing the unnormalized version of the circle polynomials, with exponential rather than trigonometric azimuthal dependence, and by a proper combination of the two partial derivatives, a concise form of the expressions emerges. This form is appropriate for the formulation and solution of a model wavefront sensing problem of reconstructing a wavefront on the level of its expansion coefficients from (measurements of the expansion coefficients of) the partial derivatives. It turns out that the least-squares estimation problem arising here decouples per azimuthal order m, and per m the generalized inverse solution assumes a concise analytic form so that singular value decompositions are avoided. The preferred version of the circle polynomials, with proper combination of the partial derivatives, also leads to a concise analytic result for the Zernike expansion of the Laplacian of the circle polynomials. From these expansions, the properties of the Laplacian as a mapping from the space of circle polynomials of maximal degree N, as required in the study of the Neumann problem associated with the transport-of-intensity equation, can be read off within a single glance. Furthermore, the inverse of the Laplacian on this space is shown to have a concise analytic form.

  15. "Socratic Circles are a Luxury": Exploring the Conceptualization of a Dialogic Tool in Three Science Classrooms

    Science.gov (United States)

    Copelin, Michelle Renee

    Research has shown that dialogic instruction promotes learning in students. Secondary science has traditionally been taught from an authoritative stance, reinforced in recent years by testing policies requiring coverage. Socratic Circles are a framework for student-led dialogic discourse, which have been successfully used in English language arts and social studies classrooms. The purpose of this research was to explore the implementation process of Socratic Circles in secondary science classes where they have been perceived to be more difficult. Focusing on two physical science classes and one chemistry class, this study described the nature and characteristics of Socratic Circles, teachers' dispositions toward dialogic instruction, the nature and characteristics of student discussion, and student motivation. Socratic Circles were found to be a dialogic support that influenced classroom climate, social skills, content connections, and student participation. Teachers experienced conflict between using traditional test driven scripted teaching, and exploring innovation through dialogic instruction. Students experienced opportunities for peer interaction, participation, and deeper discussions in a framework designed to improve dialogic skills. Students in two of the classrooms showed evidence of motivation for engaging in peer-led discussion, and students in one class did not. The class that did not show evidence of motivation had not been given the same scaffolding as the other two classes. Two physical science teachers and one chemistry teacher found that Socratic Circles required more scaffolding than was indicated by their peers in other disciplines such as English and social studies. The teachers felt that student's general lack of background knowledge for any given topic in physical science or chemistry necessitated the building of a knowledge platform before work on a discussion could begin. All three of the teachers indicated that Socratic Circles were a

  16. Ferrugem em framboesa no estado de Santa Catarina Red raspberry rust in Santa Catarina state

    Directory of Open Access Journals (Sweden)

    Ricardo Trezzi Casa

    2010-09-01

    Full Text Available Folhas e frutos de framboesa (Rubus idaeus L. da cultivar Batum coletados de plantas do pomar do Centro de Ciências Agroveterinárias, CAV, município de Lages-SC, apresentando pústulas de ferrugem, foram encaminhados para análise no Laboratório de Fitopatologia do CAV. A diagnose indireta indicou a presença de pústulas com uma massa de esporos de cor amarela na face abaxial das folhas e superfície dos frutos. No exame ao microscópio, observou-se urédia e urediniósporos pequenos, obovados ou elipsoides, medindo 12,5-17,5 x 15,0-30,0 µm sobre a epiderme da folha e frutos, sem a presença de télias. Suspensão de urediniósporos (50.000 esporos mL-1 em água esterilizada foi pulverizada em folhas destacadas da mesma cultivar, mantidas por 24 h no escuro e 12 h de fotoperíodo em câmara úmida a 20ºC. Folhas-controle foram pulverizadas com água esterilizada. Após 10 dias detectaram-se urédias contendo urediniósporos na face abaxial das folhas, cujas características morfológicas e mensuração dos urediniósporos, sintomas e patogenicidade permitiram a identificação do agente causal como sendo Pucciniastrum americanum (Farl. Arthur pela primeira vez no Estado de Santa Catarina.Leaves and fruits of red raspberry (Rubus idaeus L. of the cultivar Batum collected from the Agriculture and Life Science College - CAV orchard in Lages, SC, presenting rust pustules were analyzed in the CAV Plant Pathology Laboratory. Indirect diagnosis indicated in the abaxial side of the infected leaves and fruits surface pustules filled with masses of yellow spores. Under microscope exam, uredia and small, obovate or elliptical and averaged 12,5-17,5 x 15,0-30,0 µm urediniospores become evident in leaves and fruit surface. Telia were not observed. Urediniopores (50.000 esporos mL-1 were suspended in sterile water and sprayed onto same cultivar leaves that were maintained in a darkened mist chamber at 20ºC for 24 h and transferred to a 20ºC and 12 h

  17. Evidências de Isomorfismo nas Funções da Controladoria das Empresas Familiares Têxteis de Santa Catarina

    Directory of Open Access Journals (Sweden)

    Ilse Maria Beuren

    2010-01-01

    Full Text Available The objective is to verify the evidence of isomorphism in the functions of controlling family textile business in Santa Catarina. Descriptive study was conducted by surveying or survey, with a qualitative approach. The survey includes 46 family businesses associated with Sintex Blumenau, Santa Catarina. The controller of these were sent a questionnaire to indicate the degree of importance in controlling the functions of your company, we obtained 13 responses, comprising the non-random sample. To identify the networks of isomorphism present in controllership functions investigated, we proceeded to calculate a weighted function with software UNICET ®. The survey results show similarities in the degree of importance attributed to accounting functions, managerial and strategic decisions, costs, tax, asset protection and control, internal controls, risk control, information management and operational control. We conclude that there is evidence of isomorphism in most of the functions of controlling family businesses surveyed, considering the degree of importance attributed by respondents to the activities distributed in nine functions mentioned. The functions managerial / strategic, cost accounting and occupied the central positions of the network isomorphisms showing greater similarity between the firms.

  18. [General practice quality circles in the large city. Participation by Hamburg general physicians].

    Science.gov (United States)

    Steinkohl, M; Niemann, D

    1997-01-01

    Quality circles (peer review) will play an increasing and important role in ambulatory care when they are based on voluntary participation and in a setting of open discussion. Goal is the further qualification of physicians by critical reflections on their practice based on learning processes and the experiences of the participants. Reported are experiences from the unit for primary care and health service research of the Hamburg University on implementing quality circles. Engagement in quality assurance may be helpful in the shaping and professionalisation of general practice.

  19. The quantum harmonic oscillator on a circle and a deformed quantum field theory

    Energy Technology Data Exchange (ETDEWEB)

    Rego-Monteiro, M.A. [Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil). E-mail: regomont@cbpf.br

    2001-05-01

    We construct a deformed free quantum field theory with an standard Hilbert space based on a deformed Heisenberg algebra. This deformed algebra is a Heisenberg-type algebra describing the first levels of the quantum harmonic oscillator on a circle of large length L. The successive energy levels of this quantum harmonic oscillator on a circle of large length L are interpreted, similarly to the standard quantum one-dimensional harmonic oscillator on an infinite line, as being obtained by the creation of a quantum particle of frequency w at very high energies. (author)

  20. Investigation of Brain Arterial Circle Malformations Using Electrical Modelling and Simulation

    Directory of Open Access Journals (Sweden)

    Klara Capova

    2006-01-01

    Full Text Available The paper deals with the cerebral arterial system investigation by means of electrical modelling and simulations. The main attention is paid to the brain arterial circle malformations (stenoses and aneurysms and their determination and evaluation by computer-aided methods as tools of a non-invasive diagnostics. The compensation possibilities of brain arterial circle in case of presence of concrete arterial malformations are modelled and simulated. The simulation results of brain arteries blood pressures and volume flow velocities time dependences are presented and discussed under various health conditions.

  1. Circle of Willis variation in a complex stroke presentation: a case report

    Directory of Open Access Journals (Sweden)

    Young Carolyn A

    2006-03-01

    Full Text Available Abstract Background The impact of circle of Willis anatomical variation upon the presentation of stroke is probably underrecognised. Case presentation A 63-year-old right-handed woman developed a left hemiparesis and right leg weakness sequentially following a road traffic accident (RTA. Despite initial concern about the possibility of cervical spinal cord injury, the final diagnosis was bilateral artery-to-artery embolic cerebral infarction with dominant right internal carotid artery. Conclusion The case illustrates the complex presentation of stroke as a pseudo-cervical cord lesion and the impact of circle of Willis anatomical variation upon the expression of large vessel cerebrovascular disease.

  2. Circular and linear regression fitting circles and lines by least squares

    CERN Document Server

    Chernov, Nikolai

    2010-01-01

    Find the right algorithm for your image processing applicationExploring the recent achievements that have occurred since the mid-1990s, Circular and Linear Regression: Fitting Circles and Lines by Least Squares explains how to use modern algorithms to fit geometric contours (circles and circular arcs) to observed data in image processing and computer vision. The author covers all facets-geometric, statistical, and computational-of the methods. He looks at how the numerical algorithms relate to one another through underlying ideas, compares the strengths and weaknesses of each algorithm, and il

  3. Collective motions of globally coupled oscillators and some probability distributions on circle

    Energy Technology Data Exchange (ETDEWEB)

    Jaćimović, Vladimir [Faculty of Natural Sciences and Mathematics, University of Montenegro, Cetinjski put, bb., 81000 Podgorica (Montenegro); Crnkić, Aladin, E-mail: aladin.crnkic@hotmail.com [Faculty of Technical Engineering, University of Bihać, Ljubijankićeva, bb., 77000 Bihać, Bosnia and Herzegovina (Bosnia and Herzegovina)

    2017-06-28

    In 2010 Kato and Jones described a new family of probability distributions on circle, obtained as Möbius transformation of von Mises distribution. We present the model demonstrating that these distributions appear naturally in study of populations of coupled oscillators. We use this opportunity to point out certain relations between Directional Statistics and collective motion of coupled oscillators. - Highlights: • We specify probability distributions on circle that arise in Kuramoto model. • We study how the mean-field coupling affects the shape of distribution of phases. • We discuss potential applications in some experiments on cell cycle. • We apply Directional Statistics to study collective dynamics of coupled oscillators.

  4. Vicious circles of punishment: a reading of Melanie Klein's Envy and gratitude.

    Science.gov (United States)

    Smith, Henry F

    2008-01-01

    Staged as a moral drama, Melanie Klein's Envy and Gratitude (1957) straddles two eras: one reflecting a simpler more concrete, historical method, and the other an approach of greater complexity, focused on the transferential moment. Embedded within the transference are the vicious circles of envy and punishment that are the hallmark of Klein's text. Punishment itself which is always punishment of both self and other, creates its own vicious circle, set in motion by a single act. In the sadomasochistic enactments that result, the moral force of Klein's categories fuels the countertransference. A detailed clinical hour is presented.

  5. CircleBoard-Pro: Concrete manipulative-based learning cycle unit for learning geometry

    Science.gov (United States)

    Jamhari, Wongkia, Wararat

    2018-01-01

    Currently, a manipulative is commonly used in mathematics education as a supported tool for teaching and learning. With engaging natural interaction of a concrete manipulative and advantages of a learning cycle approach, we proposed the concrete manipulative-based learning cycle unit to promote mathematics learning. Our main objectives are to observe possibilities on the use of a concrete manipulative in learning geometry, and to assess students' understanding of a specific topic, angle properties in a circle, of secondary level students. To meet the first objective, the concrete manipulative, called CricleBoard-Pro, was designed. CircleBoard-Pro is built for easy to writing on or deleting from, accurate angle measurement, and flexible movement. Besides, learning activities and worksheets were created for helping students to learn angle properties in a circle. Twenty eighth graders on a lower secondary school in Indonesia were voluntarily involved to learn mathematics using CircleBoard-Pro with the designed learning activities and worksheets. We informally observed students' performance by focusing on criteria of using manipulative tools in learning mathematics while the learning activities were also observed in terms of whether they work and which step of activities need to be improved. The results of this part showed that CircleBoard-Pro complied the criteria of the use of the manipulative in learning mathematics. Nevertheless, parts of learning activities and worksheets need to be improved. Based on the results of the observation, CircleBoard-Pro, learning activities, and worksheets were merged together and became the CircleBoardPro embedded on 5E (Engage - Explore - Explain - Elaborate - Evaluate) learning cycle unit. Then, students understanding were assessed to reach the second objective. Six ninth graders from an Indonesian school in Thailand were recruited to participate in this study. Conceptual tests for both pre-and post-test, and semi

  6. 33 CFR 334.730 - Waters of Santa Rosa Sound and Gulf of Mexico adjacent to Santa Rosa Island, Air Force Proving...

    Science.gov (United States)

    2010-07-01

    ... Gulf of Mexico adjacent to Santa Rosa Island, Air Force Proving Ground Command, Eglin Air Force Base... Sound and Gulf of Mexico adjacent to Santa Rosa Island, Air Force Proving Ground Command, Eglin Air... regulations. (1) Experimental test operations will be conducted by the U.S. Air Force within the prohibited...

  7. Mammalia, Didelphimorphia and Rodentia, central Santa Fe Province, Argentine.

    Directory of Open Access Journals (Sweden)

    Teta, P.

    2010-01-01

    Full Text Available Three owl pellets samples collected in the localities of Pedro Gómez Cello (= Estación Km. 197;30°02’14” S, 60°18’56” W, Colonia Silva (= Estación Abipones; 30°26’59” S, 60°25’58” W and Jacinto L. Arauz(30°44’01” S, 60°58’31” W, Province of Santa Fe, Argentina, were studied. We registered 11 genera of smallmammals, including Didelphidae marsupials (1 species, and Caviidae (1, Cricetidae (10, and Muridae (1rodents. We documented the southernmost record for Pseudoryzomys simplex and the first and second recordinglocalities for Santa Fe of Oligoryzomys nigripes and Graomys chacoensis, respectively.

  8. Migraine with aura is associated with an incomplete circle of willis: results of a prospective observational study.

    Directory of Open Access Journals (Sweden)

    Brett Cucchiara

    Full Text Available To compare the prevalence of an incomplete circle of Willis in patients with migraine with aura, migraine without aura, and control subjects, and correlate circle of Willis variations with alterations in cerebral perfusion.Migraine with aura, migraine without aura, and control subjects were prospectively enrolled in a 1∶1∶1 ratio. Magnetic resonance angiography was performed to examine circle of Willis anatomy and arterial spin labeled perfusion magnetic resonance imaging to measure cerebral blood flow. A standardized template rating system was used to categorize circle of Willis variants. The primary pre-specified outcome measure was the frequency of an incomplete circle of Willis. The association between circle of Willis variations and cerebral blood flow was also analyzed.170 subjects were enrolled (56 migraine with aura, 61 migraine without aura, 53 controls. An incomplete circle of Willis was significantly more common in the migraine with aura compared to control group (73% vs. 51%, p = 0.02, with a similar trend for the migraine without aura group (67% vs. 51%, p = 0.08. Using a quantitative score of the burden of circle of Willis variants, migraine with aura subjects had a higher burden of variants than controls (p = 0.02. Compared to those with a complete circle, subjects with an incomplete circle had greater asymmetry in hemispheric cerebral blood flow (p = 0.05. Specific posterior cerebral artery variants were associated with greater asymmetries of blood flow in the posterior cerebral artery territory.An incomplete circle of Willis is more common in migraine with aura subjects than controls, and is associated with alterations in cerebral blood flow.

  9. Migraine with aura is associated with an incomplete circle of willis: results of a prospective observational study.

    Science.gov (United States)

    Cucchiara, Brett; Wolf, Ronald L; Nagae, Lidia; Zhang, Quan; Kasner, Scott; Datta, Ritobrato; Aguirre, Geoffrey K; Detre, John A

    2013-01-01

    To compare the prevalence of an incomplete circle of Willis in patients with migraine with aura, migraine without aura, and control subjects, and correlate circle of Willis variations with alterations in cerebral perfusion. Migraine with aura, migraine without aura, and control subjects were prospectively enrolled in a 1∶1∶1 ratio. Magnetic resonance angiography was performed to examine circle of Willis anatomy and arterial spin labeled perfusion magnetic resonance imaging to measure cerebral blood flow. A standardized template rating system was used to categorize circle of Willis variants. The primary pre-specified outcome measure was the frequency of an incomplete circle of Willis. The association between circle of Willis variations and cerebral blood flow was also analyzed. 170 subjects were enrolled (56 migraine with aura, 61 migraine without aura, 53 controls). An incomplete circle of Willis was significantly more common in the migraine with aura compared to control group (73% vs. 51%, p = 0.02), with a similar trend for the migraine without aura group (67% vs. 51%, p = 0.08). Using a quantitative score of the burden of circle of Willis variants, migraine with aura subjects had a higher burden of variants than controls (p = 0.02). Compared to those with a complete circle, subjects with an incomplete circle had greater asymmetry in hemispheric cerebral blood flow (p = 0.05). Specific posterior cerebral artery variants were associated with greater asymmetries of blood flow in the posterior cerebral artery territory. An incomplete circle of Willis is more common in migraine with aura subjects than controls, and is associated with alterations in cerebral blood flow.

  10. Migration, Informalization and Public Space in Santa Cruz, Bolivia

    Directory of Open Access Journals (Sweden)

    Joshua Kirshner

    2011-01-01

    Full Text Available In this paper, I ask how migrant insertion into the local economy, in particular in the informal economy, has led to contestation over public space in Santa Cruz.  Related to this issue, the paper asks what sorts of collective actions are used to defend rights to the use of urban public space, and what are the key points of contention.  In my analysis, I look at theoretical connections between the informal economy and urban space, recent changes in the Santa Cruz local economy ‒including accelerated migration and the burgeoning informal economy‒ and conflicts over uses of public urban space.En este trabajo indago cómo la inserción migratoria en la economía local, particularmente en la economía informal, ha llevado a un debate sobre los usos del espacio público en Santa Cruz. En relación con esta problemática, mi trabajo explora qué tipo de acciones colectivas se utilizan para defender los derechos del uso del espacio público urbano, y cuáles son los puntos claves de conflicto. En mi análisis, exploro las conexiones teóricas entre la economía informal y el espacio urbano, los cambios recientes en la economía local de Santa Cruz ‒incluyendo la migración acelerada y la emergente economía informal‒ y los conflictos sobre usos del espacio urbano público.

  11. Diagnosis of the retail flower market of Santa Maria, RS

    OpenAIRE

    Janine Farias Menegaes; Fernanda Alice Antonello Londero Backes; Rogério Antônio Bellé; Rogério Luiz Backes

    2015-01-01

    The present study aimed to diagnose the flowers retail market and ornamental plants in Santa Maria, RS, Brazil, by means of a research in loco, from January to June of 2013, based on questionnaires and interviews applied to the managers of the establishment, as well as of an application of a visual and phytosanitary scale to other establishments that sell flowers and ornamental plants, such as agricultural shops, fairs of horticultural products, supermarkets and providers of funeral services ...

  12. Tetanus epidemiology in Santa Catarina, Brazil from 1998 to 2008

    OpenAIRE

    Mattos, Ana Carolina Squeff de; Hernandes Júnior, Clineu Gaspar; Fuentefria, Alexandre Meneghello

    2010-01-01

    Objetive: This work describes demographic and clinical characteristics of individuals with accidental tetanus in Santa Catarina, Brazil. Materials and Methods: 291 cases of accidental tetanus reported from 1998 to 2008 were analyzed retrospectively through a cross-sectional, descriptive and correlated study based on percentage and numeric frequency as well as on number and incidence rate (i.r.) found in compulsory notification forms. Results: Most cases (73,54%) occurred among men residing in...

  13. Status of Santa Clara MCFC product development test

    Energy Technology Data Exchange (ETDEWEB)

    Leo, A.J.; O`Shea, T.P.

    1995-08-01

    The objective of the 2MW Santa Clara Demonstration Project is the demonstration of the carbonate fuel cell technology at full scale. Additional objectives of the project include the demonstration of specific advantages of the direct carbonate fuel cell power plant, such as high efficiency, low emissions, reactive power capability, and high reliability and availability. The project will also provide design input for precommercial early production power plants.

  14. Migración negra en Santa Marta

    Directory of Open Access Journals (Sweden)

    Josè Luis Vega de Lavalle

    2013-11-01

    Full Text Available El objetivo de este artículo es dar cuenta de los procesos e inserción urbana de la Gente Negra  se ha instalado en Santa Marta, los cuales han llegado a partir de la década de los años ochenta a  en el sector turístico de esta ciudad.

  15. Theoretical Considerations about the Quality of Life in Santa Marta

    Directory of Open Access Journals (Sweden)

    Néstor Ramos N.

    2015-07-01

    Full Text Available Rev.esc.adm.neg Poverty, social exclusion, the gentrification phenomenon, the spatial segregation in big urban areas are factors that led to a decrease in the levels of the inhabitants´ quality of life, even more when these phenomena involve the destruction of natural resources necessary for the preservation of environmental sustainability, starting with its sustainable growth. This objective could be reached when identifying the variables that its inhabitants take into account for their quality of life. Santa Marta, a Caribbean city of Colombia, should focus its development on generating a good quality of life for its inhabitants. This article shows the final outcomes of the study which define the theoretical bases of this research, being still in development; its title is The Quality of Life in Santa Marta, a perspective from its inhabitants´ concepts. The aim of this final stage is to define the main concepts that are part of this research and to make a description of Santa Marta, Magdalena region. This project has been completely financed by Universidad Jorge Tadeo Lozano.

  16. Santa Clara County Planar Solid Oxide Fuel Cell Demonstration Project

    Energy Technology Data Exchange (ETDEWEB)

    Fred Mitlitsky; Sara Mulhauser; David Chien; Deepak Shukla; David Weingaertner

    2009-11-14

    The Santa Clara County Planar Solid Oxide Fuel Cell (PSOFC) project demonstrated the technical viability of pre-commercial PSOFC technology at the County 911 Communications headquarters, as well as the input fuel flexibility of the PSOFC. PSOFC operation was demonstrated on natural gas and denatured ethanol. The Santa Clara County Planar Solid Oxide Fuel Cell (PSOFC) project goals were to acquire, site, and demonstrate the technical viability of a pre-commercial PSOFC technology at the County 911 Communications headquarters. Additional goals included educating local permit approval authorities, and other governmental entities about PSOFC technology, existing fuel cell standards and specific code requirements. The project demonstrated the Bloom Energy (BE) PSOFC technology in grid parallel mode, delivering a minimum 15 kW over 8760 operational hours. The PSOFC system demonstrated greater than 81% electricity availability and 41% electrical efficiency (LHV net AC), providing reliable, stable power to a critical, sensitive 911 communications system that serves geographical boundaries of the entire Santa Clara County. The project also demonstrated input fuel flexibility. BE developed and demonstrated the capability to run its prototype PSOFC system on ethanol. BE designed the hardware necessary to deliver ethanol into its existing PSOFC system. Operational parameters were determined for running the system on ethanol, natural gas (NG), and a combination of both. Required modeling was performed to determine viable operational regimes and regimes where coking could occur.

  17. Landscapes of Santa Rosa Island, Channel Islands National Park, California

    Science.gov (United States)

    Schumann, R. Randall; Minor, Scott A.; Muhs, Daniel R.; Pigati, Jeffery S.

    2014-01-01

    Santa Rosa Island (SRI) is the second-largest of the California Channel Islands. It is one of 4 east–west aligned islands forming the northern Channel Islands chain, and one of the 5 islands in Channel Islands National Park. The landforms, and collections of landforms called landscapes, of Santa Rosa Island have been created by tectonic uplift and faulting, rising and falling sea level, landslides, erosion and deposition, floods, and droughts. Landscape features, and areas delineating groups of related features on Santa Rosa Island, are mapped, classified, and described in this paper. Notable landscapes on the island include beaches, coastal plains formed on marine terraces, sand dunes, and sand sheets. In this study, the inland physiography has been classified into 4 areas based on relief and degree of fluvial dissection. Most of the larger streams on the island occupy broad valleys that have been filled with alluvium and later incised to form steep- to vertical-walled arroyos, or barrancas, leaving a relict floodplain above the present channel. A better understanding of the processes and mechanisms that created these landscapes enhances visitors’ enjoyment of their surroundings and contributes to improving land and resource management strategies in order to optimize and balance the multiple goals of conservation, preservation, restoration, and visitor experience.

  18. Santa Teresa y sus cartas, historia de los sentimientos

    Directory of Open Access Journals (Sweden)

    Egido, Teófanes

    2015-12-01

    Full Text Available Historical reflection on a peculiar dimension of St. Teresa of Jesus: the expression of her feelings in her writings, particularly in her abundant letters. The article focuses on the sense of humor, the joyfulness, and the importance of laughter in St. Teresa language, and also on the feeling of endearment with her family, with her order, with fray Juan de la Cruz. Ample space is dedicated to the tenderness towards girls in her convents. St. Teresa of Jesus appears as transgressor of 16th century social behaviours.Reflexión histórica sobre una dimensión peculiar de santa Teresa de Jesús: la expresión de sus sentimientos en sus escritos, de forma más especial en sus cartas abundantes. El artículo se centra en el sentido del humor, de la alegría, en la importancia de la risa en el lenguaje de santa Teresa y en el sentimiento de ternura con su familia, con su orden, con fray Juan de la Cruz. Se dedica un espacio amplio a la ternura hacia las niñas en sus conventos. Aparece santa Teresa de Jesús como trasgresora de los comportamientos sociales del siglo XVI.

  19. A quantitative analysis of surgical capacity in Santa Cruz, Bolivia.

    Science.gov (United States)

    Markin, Abraham; Barbero, Roxana; Leow, Jeffrey J; Groen, Reinou S; Skow, Evan J; Apelgren, Keith N; Kushner, Adam L; Nwomeh, Benedict C

    2013-11-01

    This investigation aimed to document surgical capacity at public medical centers in a middle-income Latin American country using the Surgeons OverSeas (SOS) Personnel, Infrastructure, Procedures, Equipment, and Supplies (PIPES) survey tool. We applied the PIPES tool at six urban and 25 rural facilities in Santa Cruz, Bolivia. Outcome measures included the availability of items in five domains (Personnel, Infrastructure, Procedures, Equipment, and Supplies) and the PIPES index. PIPES indices were calculated by summing scores from each domain, dividing by the total number of survey items, and multiplying by 10. Thirty-one of the 32 public facilities that provide surgical care in Santa Cruz were assessed. Santa Cruz had at least 7.8 surgeons and 2.8 anesthesiologists per 100,000 population. However, these providers were unequally distributed, such that nine rural sites had no anesthesiologist. Few rural facilities had blood banking (4/25), anesthesia machines (11/25), postoperative care (11/25), or intensive care units (1/25). PIPES indices ranged from 5.7-13.2, and were significantly higher in urban (median 12.6) than rural (median 7.8) areas (P Bolivia's development status. Unfortunately, surgeons are limited in rural areas by deficits in anesthesia and perioperative services. These results are currently being used to target local quality improvement initiatives. Copyright © 2013 Elsevier Inc. All rights reserved.

  20. The rolling circle . capsid complex as an intermediate in phi X DNA replication and viral assembly.

    Science.gov (United States)

    Koths, K; Dressler, D

    1980-05-10

    Late in the life cycle of the single-stranded DNA phage phi X, the synthesis of positive strand DNA is coupled to the maturation of progeny virions. DNA synthesis and packaging take place in a replication-assembly complex, which we have purified to homogeneity and characterized. The following conclusions can be drawn: 1. The DNA component of the replication-assembly complex is a rolling circle with a single-stranded DNA tail which is less than or equal to genome length. 2. The major protein component of the replication-assembly complex is an intact viral capsid, as shown by gel analysis of 35S-labeled complexes. As replication proceeds at the DNA growing point, the positive strand tail of the rolling circle is displaced directly into the capsid. In addition to the capsid, the complex contains at least 1 molecule of the phi X gene A nicking protein, which appears to be covalently linked to the DNA. 3. The rolling circle . capsid complex can be purified to homogeneity by taking advantage of its uniform sedimentation velocity (35 S) and its uniform density upon equilibrium centrifugation in CsCl (1.50 g/cc). 4. The replication-assembly complex can be visualized in the electron microscope. An electron-dense particle, which has the dimensions of a viral capsid, is observed attached to a rolling circle at the DNA growing point. 5. Hybridization of specific phi X restriction fragments to the deproteinized, single-stranded tails of intact rolling circles has allowed the use of these replicating intermediates to determine both the origin/terminus and the direction of phi X positive strand DNA synthesis. The ends of the rolling circle tails map in the Hae III restriction Fragment Z6b, at the position on the phi X genome at which the gene A endonuclease is known to cut. This result indicates that this endonuclease participates in the "termination" of each round of synthesis by cutting off unit-length viral genomes. 6. Rolling circle . capsid complexes were also isolated from